CN104823569B - Seeding transplant machine - Google Patents

Abstract

The present invention provides a seedling transplanting machine which prevents consumption of excess fertilizer, prevents a section where no fertilizer is supplied, performs appropriate fertilization work, and improves the workability of fertilization. A seedling planting section is provided at the rear of the traveling vehicle body in a freely movable manner, a floating body in contact with the farmland surface is installed in the seedling planting section, a fertilization device for supplying fertilizer to the farmland is installed, and an angle detection device for detecting the rotation angle of the floating body is installed. Components, equipped with the rotary interlocking mechanism that switches the lifting of the seedling planting part and the action of the seedling planting part and the fertilization device in conjunction with the rotation of the traveling car body, and the fertilization transmission on-off part (422 ), a control device is set, and when the seedling planting part is lowered by the rotary linkage mechanism and the detection angle of the angle detection part is within the specified angle range, the control device makes the fertilization transmission on-off part (422) in the ON state.

Description

Seedling transplanting machine

technical field

The present invention relates to a seedling transplanting machine provided with a planting device for planting a seedling in an agricultural field.

Background technique

In the conventional seedling transplanting machine, there is known a technique of reducing the burden on the operator by controlling the planting device in conjunction with the turning operation of the body during the reciprocating planting work in the field. The following Patent Document 1 discloses a structure in which, as a seedling transplanting machine applicable to wide-width conditions, a control unit having a plurality of turning modes is provided, so that the turning operation of the body can be performed according to the site conditions and work contents. The planting device is controlled in linkage.

According to this structure, since an appropriate turning pattern can be selected at the time of turning of a seedling transplanting machine, turning operation|movement suitable for a condition can be performed.

prior art literature

Patent Document 1: Japanese Patent No. 4543247

Contents of the invention

The problem to be solved by the invention

However, the seedling transplanting machine described in Patent Document 1 has a structure in which, when the completion of the rotation is detected at the operating position of the rotary operation member, the fertilization device is operated before the operation of the planting device, and the fertilizer is applied simultaneously with the start of planting of the seedlings. supply. Therefore, after the turning operation member is operated to the turning end position, the planting device operates only after the body advances a predetermined distance, so there is a problem that fertilizer is supplied first and excess fertilizer is consumed.

In addition, there is another problem that if the body reaches the planting start position of the seedlings earlier than the fertilizer reaches the field from the storage hopper of the fertilization device via the fertilization hose, a section where no fertilizer is supplied occurs.

The object of the present invention is to provide a seedling transplanting machine which prevents excess fertilizer from being consumed, prevents a section where no fertilizer is supplied, performs appropriate fertilization work, and improves the workability of fertilization.

Solution to the problem

The above-mentioned problems of the present invention are solved by the following solutions.

The invention described in Claim 1 is a kind of seedling transplanting machine, in which left and right rear wheels as drive wheels are provided on the traveling vehicle body, a seedling planting part is provided in a freely ascending and descending manner at the rear part of the traveling vehicle body, and on the seedling planting part A floating body in contact with the farmland surface is provided, a fertilizing device for supplying fertilizer to the farmland is provided, an angle detection member for detecting the rotation angle of the above-mentioned floating body is provided, and the lifting and lowering of the seedling planting part is switched in conjunction with the rotation of the above-mentioned traveling vehicle body. The rotary interlocking mechanism of the operation of the seedling planting part and the fertilization device, the above-mentioned seedling transplanting machine is characterized in that a planting action on-off part for switching on and off the planting action of the above-mentioned seedling planting part is provided, and the rotation speed of the rotation speed of the above-mentioned rear wheel is detected. The sensor is provided with a fertilization transmission on-off component that switches the action of the above-mentioned fertilization device, and a control device is provided. When the seedling planting part rises through the above-mentioned rotary interlocking mechanism and starts to detect the rotational speed by the rotation sensor, the planting action is turned on and off. When the seedling planting part is lowered to ground the floating body and the detection angle of the angle detection part is within the specified angle range, the control device makes the above-mentioned fertilization transmission on-off part in the on-state , when the rotational speed detected by the above-mentioned rotation sensor reaches a predetermined rotational speed, the control device puts the planting operation on-off component in the on-state.

The invention according to claim 2 is the seedling transplanting machine according to claim 1, wherein the control device turns on the fertilization drive on-off part while keeping the planting operation on-off part off.

The invention according to claim 3 is the seedling transplanting machine according to claim 1 or 2, wherein left and right rear wheel gearboxes for respectively supplying drive power to the left and right rear wheels are provided, and the left and right rear wheel gearboxes A fertilization transmission unit for supplying driving force to the fertilization device via the rear wheel gearbox and the fertilization transmission on-off unit for switching on and off the transmission to the fertilization transmission unit constitute a fertilization transmission mechanism.

The invention described in claim 4 is the seedling transplanting machine described in claim 3, wherein a planting on-off switching member for turning on and off the above-mentioned planting action on-off member, and a device for switching on and off of the above-mentioned fertilizing drive on-off member are provided. The fertilization transmission on-off switching component and the fertilization transmission switching component that operates the fertilization transmission on-off switching component. range or any condition that the above-mentioned fertilization transmission switching part is turned on and operated, the above-mentioned fertilization transmission on-off switching part is actuated to make the fertilization transmission on-off part in the on-state, and one side end of the above-mentioned fertilization transmission part It protrudes to the outside of the rear wheel gearbox, and in the fertilization transmission part, a manual operation part for manually operating the fertilizer supply of the fertilization device is provided at the part protruding from the rear wheel gearbox.

The invention according to claim 5 is the seedling transplanting machine according to claim 3, wherein a turning operation member for steering the above-mentioned traveling vehicle body is provided, left and right front wheels are provided on the above-mentioned traveling vehicle body, and the turning operation member is provided in accordance with the turning operation. The steering mechanism that changes the direction of the left and right front wheels in conjunction with the operation of the components and disengages the side clutch of the rear wheel on the inside of the rotation is equipped with a turning direction detection device that detects the turning operation direction of the turning operation member. component, the above-mentioned control device is configured such that when the rotation direction detected by the rotation direction detection component is that the rear wheel gearbox on the left and right side of the above-mentioned fertilization transmission component is turned inside, the above-mentioned fertilization transmission on-off switching component makes the fertilization transmission The moment when the on-off member is in the on-state is earlier than the rear wheel gearbox on the other side of the left and right being turned inside.

The invention according to claim 6 is the seedling transplanting machine according to claim 1 or 2, wherein an engine and left and right front wheels are provided on the above-mentioned traveling vehicle body, and a pair of transmissions from the engine to the above-mentioned front wheels and rear wheels is provided. The transmission device is provided with an auxiliary transmission switching operation member for switching the auxiliary transmission device, and an auxiliary transmission operation position detection member for detecting the operation position of the auxiliary transmission switching operation member is provided, so that the auxiliary transmission device cuts off the front wheel. and the transmission of the rear wheels to switch to the neutral operation position of the above-mentioned auxiliary transmission switching operation member that switches to the driving neutral state and makes the above-mentioned planting action on-off member in the off state, and forms a stop planting position on the side of the neutral operation position. , setting the stop planting position detection part that detects that the sub-speed switching operation part is located in the stop planting position, through the operation of the above-mentioned sub-speed changeover operation part to the above-mentioned stop planting position, switch to cut off the transmission to the above-mentioned front wheel and rear wheel In the state where the above-mentioned planting operation on-off member is in the ON state and the planting device is operated to stop the planting state, the control device is configured to detect that the sub-speed switching operation member is operated to stop planting by using the above-mentioned stop planting position detection unit. position, and when the rotation angle of the floating body is within the specified angle range, the planting action on-off part that makes the planting action of the seedling planting part on and off is in the on state, and although the above-mentioned stop planting position detection part is used to detect the secondary The speed change switching operation part is operated to the planting stop position, but when the rotation angle of the floating body detected by the angle detection part is outside the specified angle range, the planting action on-off part is in the off state.

The invention according to claim 7 is the seedling transplanting machine according to claim 1 or 2, characterized in that an engine and left and right front wheels are provided on the traveling vehicle body, and an engine is provided to extend from the engine to the left and right front wheels and the left and right rear wheels. The auxiliary transmission device of the wheel transmission is provided with an auxiliary transmission switching operation member for switching operation of the auxiliary transmission device, and an auxiliary transmission operation position detection member for detecting the operation position of the auxiliary transmission switching operation member is provided, forming the above auxiliary transmission device The neutral operation position of the above-mentioned auxiliary transmission switching operation member that cuts off the transmission of the front wheel and the rear wheel to switch to the driving neutral state and makes the above-mentioned planting operation on-off member in the off state, and is configured to be on the side of the neutral operation position. The planting stop position is formed squarely, and the planting stop position detection part for detecting that the auxiliary speed switching operation part is located at the planting stop position is provided. By operating the planting stop position of the auxiliary speed changeover operation part, it is switched to cut off the planting position of the front wheel. And under the state that the transmission of the rear wheel is stopped, the above-mentioned planting action on-off part is in the on-state and the planting device is in the stopped planting state, and the continuously variable transmission device for transmission from the above-mentioned engine to the auxiliary transmission is provided. A main shift switching operation member of the speed change device for shifting operation, a main shift operating amount detecting member for detecting the operation of the main shift switching operating member is provided, and the above continuously variable transmission device is provided based on the detection of the main shift operating amount detecting member. A trunnion driver that rotates a trunnion is provided with a trunnion detection member that detects the rotational position of the trunnion, and the control device is configured to detect that the main transmission switching operation member is operated to When the above-mentioned traveling vehicle body is stopped at the neutral position, and when the rotation angle of the floating body is detected to be within a predetermined angle range by the above-mentioned angle detection part, if the above-mentioned auxiliary transmission switching operation part is operated to the stop planting position, the above-mentioned planting The action on-off component is in a connected state.

The effects of the present invention are as follows.

According to the invention described in claim 1, if the angle detection part detects that the floating body is grounded during rotation, the fertilization drive on-off part will be turned on to activate the fertilization device, and when the rotational speed detected by the rotation sensor reaches a predetermined rotational speed, the planting device will be activated. When the operation on-off member is turned on to plant the seedlings, the timing of starting the planting of the turning seedlings and the timing of starting the fertilizer supply can be made different.

In addition, since the fertilizer is supplied in a state where the floating body is grounded, scattering into the air is prevented.

In addition, when the seedling planting part rises through the rotary linkage mechanism, the planting action on-off part and the fertilization transmission on-off part enter the off state, thereby preventing the seedling planting part from releasing fertilizer at a position away from the farmland surface, preventing Diffusion of fertilizers.

According to the invention described in claim 2, in addition to the effects of the invention described in claim 1, the fertilization drive on-off member is turned on while the planting operation on-off member is off to operate the fertilization device, thereby Since the fertilizer applicator can be operated to start the supply of fertilizer before the planting of the turned seedlings starts, the fertilizer reaches the field when the planting of the turned seedlings starts, and it is possible to prevent a section where no fertilizer is supplied.

According to the invention described in scheme 3, in addition to the effect of the invention described in scheme 1 or 2, the fertilization transmission mechanism is formed by setting the fertilization transmission part and the fertilization transmission on-off part at the rear wheel gearboxes on the left and right sides, so that the fertilization transmission mechanism can be independently The fertilization device can be switched on and off in a timely manner, so it can prevent the amount of fertilizer supply from being too much or too little.

In addition, the transmission path from the rear wheel gearbox to the fertilization device can be shortened by providing the fertilization transmission component and the fertilization transmission on-off component on the rear wheel gearbox that transmits the driving force to the rear wheels.

According to the invention described in scheme 4, in addition to the effect of the invention described in scheme 3 above, the on-off of the fertilization transmission on-off component can be automated by using the fertilization transmission on-off switching component. Therefore, the work efficiency can be improved, and the fertilization device can be reliably turned on and off, so as to prevent the supply of fertilizer from being too much or too little.

And, by protruding one side end of the fertilization transmission part to the outside of the rear wheel gearbox, and setting the manual operation part on the protruding part, the fertilization device can be operated manually to supply fertilizer, so there is no need to drive The setting of the fertilizer supply amount can be confirmed by moving the vehicle body, and unnecessary fuel consumption can be suppressed.

In addition, since the transmission path to the fertilization device can be shortened by providing the manual operation member on the fertilization transmission member protruding from the rear wheel gearbox, the operator's effort to operate the manual operation member can be reduced.

According to the invention described in claim 5, in addition to the effects of the invention described in claim 3 above, when the rear wheel gearboxes on the left and right sides of the fertilization transmission part are turned into the inside of the rotation, the fertilization drive on-off switching part turns the fertilization drive on and off. The timing at which the disconnecting member is turned on becomes earlier, so that the supply of fertilizer starts at the same timing as when the left and right rear wheel gearboxes are on the outside of the rotation, so that the supply of fertilizer can be prevented from being too much or too little.

According to the invention described in claim 6, in addition to the effects of the invention described in claim 1 or 2 above, if the floating body is not in the grounded state, even if the sub-shift switching operation member is operated, it will not be switched to the stop planting state, and the planting part of the seedlings can be prevented. Since the operation of planting seedlings is performed above the field surface due to erroneous operations, consumption of unnecessary seedlings can be prevented.

In addition, if the speed change switching operation member is operated to the stop planting position, the seedling planting part will operate, thus the seedlings can be planted without moving the traveling vehicle body on the spot, and it is easy to make the planting position of the seedlings coincide with the adjacent row, and the seedlings can be raised. planting accuracy.

According to the invention described in claim 7, in addition to the effects of the invention described in claim 1 or 2 above, when the floating body is in the grounded state and the main transmission switching operation member is in the neutral position, if the auxiliary transmission switching operation member is operated to stop At the planting position, the seedling planting part operates, and thus the seedlings can be planted without moving the traveling vehicle body on the spot, so it is easy to align the planting position of the seedlings with the adjacent row, and improve the planting accuracy of the seedlings.

In addition, since it is possible to prevent the seedling planting unit from performing the seedling planting operation above the field surface due to erroneous operation, consumption of unnecessary seedlings can be prevented.

Description of drawings

Fig. 1 is a side view of a riding-type rice transplanter.

Fig. 2 is a plan view of the riding-type rice transplanter.

It is a perspective view which shows the steering structure of the left and right front wheels of a riding-type rice transplanter.

Fig.4 (a) is a top view of the display panel of a riding type rice transplanter, and Fig.4 (b) is a top view of an operation panel.

Fig. 5 is a block diagram of a control device of a riding-type rice transplanter.

Fig. 6 is a schematic plan view showing a transfer structure of a riding-type rice transplanter.

It is a schematic plan view which shows the transmission structure of the driving force inside the left rear wheel gearbox of a riding-type rice transplanter.

It is a schematic plan view which shows the transmission structure of the driving force inside the right rear wheel gearbox of a riding-type rice transplanter.

It is a flowchart of the control apparatus of a riding-type rice transplanter.

It is a top view which shows the transmission mechanism which transmits to the drive wheel in the gearbox body of a passenger type rice transplanter.

Fig. 11 is an explanatory diagram of the operation of the sub-transmission mechanism in the gearbox body of the passenger-use rice transplanter.

Fig. 12 is a transmission mechanism diagram of the operating position (on-road speed) of the auxiliary transmission switching operating member.

Fig. 13 is a diagram of the transmission mechanism of the operation position (planting operation speed) of the auxiliary transmission switching operation member.

Fig. 14 is a diagram of the transmission mechanism of the operation position (neutral) of the auxiliary transmission switching operation member.

Fig. 15 is a transmission mechanism diagram of the operation position (stop planting) of the auxiliary transmission switching operation member.

FIG. 16 is a flowchart of a control device of another configuration example.

Fig. 17 is a flowchart of a control device of another configuration example.

Fig. 18 is a flowchart of a control device of another configuration example.

FIG. 19 is a flowchart of a control device of another configuration example.

Fig. 20 is a flowchart of a planting stop function of the control device of the riding-type rice transplanter.

FIG. 21 is a flowchart of planting stop processing 0 .

FIG. 22 is a flowchart of planting stop processing 1 .

FIG. 23 is a flowchart of the planting stop process 2 .

FIG. 24 is a flowchart of the planting stop process 3 .

FIG. 25 is a flowchart of the planting stop process 4 .

FIG. 26 is a flowchart summarizing FIGS. 21 to 25 .

FIG. 27 is a flowchart summarizing FIGS. 21 to 25 .

Fig. 28 is a hydraulic circuit diagram of a continuously variable transmission device of a riding-type rice transplanter.

Fig. 29 is a side sectional view of the continuously variable transmission.

Fig. 30 is a top sectional view of the continuously variable transmission.

Fig. 31 is an enlarged view of the piston portion of the continuously variable transmission.

Fig. 32 is a piston portion of a continuously variable transmission device of another configuration example.

In the picture:

2—traveling vehicle body, 4—seedling planting part, 5—fertilization device, 10—front wheel, 11—rear wheel, 16—main shift switching operation component, 16b—main shift operation amount detection component, 17—auxiliary shift switching operation Components, 17b—auxiliary transmission operation position detection component, 20—engine, 23—continuously variable transmission device, 25a—planting action on-off component, 34—rotary operation component, 55—floating body, 87—side clutch, 103—trunnion Electric motor, 113—trunnion detection component, 162—angle detection component, 163—control device, 200L—left rear wheel gearbox, 200R—right rear wheel gearbox, 295—trunnion, 401—fertilization drive Components, 420—fertilization transmission mechanism, 422—fertilization transmission on-off component, 426—manual operation part, 426a—fertilization transmission driver, 428—fertilization transmission switch, 430—stop planting position detection component, 571—secondary transmission device, N— Neutral position, T—rotary interlocking mechanism, W—stop planting position.

Detailed ways

Embodiments of the present invention will be described below.

In FIG.1 and FIG.2, the left side view and top view of the riding-type rice transplanter for 8-row planting are shown as the seedling transplanter of this embodiment. In addition, in this specification, the left and right are respectively defined as the left and right toward the advancing direction of the rice transplanter 1, and the front and rear are respectively defined as the front and the rear.

This rice transplanter 1 is configured such that a seedling planting unit 4 is mounted on the rear side of a traveling vehicle body 2 so that it can be raised and lowered via an elevating link mechanism 3, and a main body portion of a fertilization device 5 is provided on the rear upper side of the traveling vehicle body 2. . The traveling vehicle body 2 is a four-wheel drive vehicle equipped with a pair of left and right front wheels 10, 10 and a pair of left and right rear wheels 11, 11 as driving wheels. Front wheel end housings 13 are provided on the left and right sides of 12, and a left and right pair of front wheels 10, 10 are installed on left and right front wheel axles protruding outward from the front wheel support portions of the left and right front wheel end housings 13, respectively.

In addition, the traveling vehicle body 2 has: a base frame 100 whose front end has a main frame 15 fastened to the rear portion of the transmission case 12, and is disposed in the left-right direction of the traveling vehicle body 2 constituting the rear portion of the main frame 15. above ( FIG. 2 ); and a pair of left and right link base frames 42L, 42R standing upward from both end sides of the base frame 100 and connecting the front end side of the elevating link mechanism 3 .

In addition, a left rear wheel gear box 200L and a right rear wheel gear box 200L are arranged on the left and right sides of the rear portion of the traveling vehicle body 2 to house the transmission mechanism for transmitting the driving force from the engine 20 to the left and right pair of rear wheels 11 and 11. Box 200R.

The engine 20 is mounted on the main frame 15 , and the rotational power of the engine 20 is transmitted to the transmission case 12 via a belt transmission 21 and a continuously variable transmission 23 as a main transmission. Then, the rotational power transmitted to the transmission case 12 is separated into traveling power and externally extracted power by an auxiliary transmission device 571 ( FIG. 10 ) in the transmission case 12 and extracted. The auxiliary transmission device 571 changes the output of the running power from the engine 20 to the front wheels 10 , 10 and the rear wheels 11 , 11 .

And, a part of the running power is transmitted to the front wheel end housing 13 to drive the pair of left and right front wheels 10, 10, and the remaining part is transmitted to the left rear wheel gearbox 200L via the first transmission shaft 230L, and The transmission is transmitted to the right rear wheel gearbox 200R via the second transmission shaft 230R, thereby driving the pair of left and right rear wheels 11 , 11 .

In addition, a part of the running power transmitted to the left rear wheel gearbox 200L is sent to the plant mounted on the seedling planting unit 4 through the ground leveling clutch mechanism 320 ( FIGS. 6 and 7 ) provided in the left rear wheel gearbox 200L. The ground leveling rotor 27 (sometimes the combination of the first leveling rotor 27a and the second leveling rotor 27b is simply referred to as the leveling rotor 27) drives. The ground leveling clutch mechanism 320 will be described later using FIG. 7 and the like.

In addition, part of the running power transmitted to the right rear wheel gearbox 200R is transmitted to the fertilization device 5 via the fertilization transmission mechanism 420 ( FIG. 6 , FIG. 8 ) provided in the right rear wheel gearbox 200R. The fertilization transmission mechanism 420 will be described later using FIG. 8 and the like.

And the external power is taken out and transmitted to the planting clutch housing 25 located at the rear portion of the traveling vehicle body 2, from the planting clutch housing 25 through the planting drive shaft 26 to the seedling planting part 4 transmission.

The upper part of the engine 20 is covered with the engine cover 30, and the operator's seat 31 is provided on it. In front of the operator's seat 31 is a front cover 32 incorporating various operating mechanisms, and above the front cover 32 is provided a turning operation member 34 for steering the left and right front wheels 10 , 10 .

In addition, in the vicinity of the operator's seat 31, there is provided the main transmission switching operation member 16 for switching the output of the continuously variable transmission device 23, and the swash plate can be changed by rotating the lever guide 16a (FIG. 4) in the front and rear directions. The trunnion 295 (FIG. 30) at an inclination angle of 69 (FIG. 29) rotates, and the swash plate 69 is used to adjust the hydraulic pressure output from the continuously variable transmission device 23, thereby changing the output of the continuously variable transmission device 23 to enable travel. The structure of the forward and backward (start), stop (neutral), increase and deceleration of the car body 2.

The operating position of the main shift switching operating member 16 is detected by a main shift operating amount detecting member 16 b provided at the base of the main shift switching operating member 16 . The operation amount from the neutral position 16aa ( FIG. 4 ) detected by the main transmission operation amount detection unit 16b ( FIG. 5 ) is matched with the operation direction using the control device 163 and through the trunnion electric motor 103 shown in FIG. 5 . To make the trunnion 295 of the continuously variable transmission device 23 rotate. The output of the continuously variable transmission device 23 can be changed steplessly by changing the inclination angle of the swash plate 69 using the rotation angle of the trunnion 295 . In addition, the above-mentioned trunnion electric motor 103 is a motor which operates so that forward rotation may be performed on the forward side, and reverse rotation may be performed on the reverse side.

In addition, by rotating the auxiliary transmission switching operation member 17 (FIG. 2) along the lever guide 17a (FIG. 4), the auxiliary transmission device 571 is manually switched to the position and operation of the on-road speed (high speed) for movement. Any one of the position of the used planting operation speed (low speed) and the neutral position that is not transmitted to the driving system. The operation position of the auxiliary transmission switching operation member 17 is detected by an auxiliary transmission operation position detection member 17 b ( FIG. 5 ) provided at the base of the auxiliary transmission switching operation member 17 .

The left and right sides of the lower ends of the engine cover 30 and the front cover 32 form horizontal bottom steps 35 . The bottom step 35 has a partial lattice shape (see FIG. 2 ), and has a structure in which soil on the shoes of workers walking on the bottom step 35 falls to the field.

The lift link mechanism 3 is a parallel link structure, and includes an upper link 40 and a pair of left and right lower links 41 . The base sides of the upper link 40 and the lower link 41 are rotatably attached to the base frame 100 erected at the rear end of the main frame 15, a pair of left and right link base frames constituting a gate-shaped frame viewed from the back. 42L, 42R is connected with the vertical link 43 at the front-end side. And the connection shaft 44 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 43, and the seedling planting part 4 is connected swingably centering on the connection shaft 44.

An elevating hydraulic cylinder 46 is provided between the supporting member fastened to the main frame 15 and the front end of the swing arm (not shown) integrally formed on the upper link 40, and the elevating hydraulic cylinder 46 is hydraulically expanded and contracted. Thereby, the upper link 40 rotates up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

Seedling planting part 4 is the structure that 8 rows are planted, possesses: the planting transmission case 50 that doubles as frame; Carrying seedling platform (seedling loading part) 51, it carries cushion-shaped seedling and carries out reciprocating movement left and right, and seedlings are planted one by one. The seedlings are supplied to the seedling removal ports 51a of each row, and when all the seedlings in a horizontal row are supplied to the seedling removal ports 51a, the seedlings are transferred to the bottom by the seedling conveyor belt 51b; The seedlings of 51a are planted in the planting device 52 etc. in the farmland.

The center of the bottom of the seedling planting part 4 is provided with a floating body 55, and an intermediate floating body 57 and a side floating body 56 are respectively provided at its left and right sides. If these floating bodies 55, the middle floating body 57 and the side floating bodies 56 are brought into contact with the soil surface of the farmland, the body is advanced, while the floating body 55, the middle floating body 57 and the side floating bodies 56 level the soil surface. While gliding, plant seedlings on this smooth track by planting device 52.

The floating body 55, the middle floating body 57 and the side floating body 56 correspond to the unevenness of the farmland topsoil surface, and the front end side is installed so as to freely rotate in the up and down direction. The angle detecting part 162 of the front side upper part of this floating body 55 detects, switches the electromagnetic hydraulic valve 161 (Fig. The planting depth is always kept constant.

The fertilization device 5 has the following structure, that is, the granular fertilizer stored in the fertilizer container 60 is conveyed in a constant amount through the conveying part 61, and the fertilizer is guided to the floating body 55, the intermediate floating body 57 and the side floating body with the fertilizing hose 62. The fertilization guide (not shown) that the left and right sides of body 56 is installed falls in the fertilization ditch that is formed in the side portion near the seedling planting row by the ditch body 64 that is located at the front side of the fertilization guide. It becomes the structure that the air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilization hose 62 through the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilization hose 62 is blown by the wind pressure. carry out.

Moreover, the seedling loading platform 51 is a structure which slides in the left-right direction, and a pair of spare seedling frame 38,38 which mounts the seedling for replenishment is provided in the front part left and right sides of the traveling vehicle body 2.

The perspective view shown in FIG. 3 shows the steering structure of the left and right front wheels 10 and 10 of the riding-type rice transplanter shown in FIG. 1 . The configuration of a portion where the left and right front wheels 10 , 10 are steered by the turning operation member 34 will be described.

The turning operation part 34 is fixed on the upper part of the steering shaft arranged in the front cover 32 , and the rotation of the steering shaft is transmitted to the output shaft 174 after being decelerated by the steering transmission gear arranged in the transmission case 12 . In addition, the lower end of the output shaft 174 protrudes from the bottom surface of the transmission case 12 and is fixed with a steering arm 175 . The front left and right sides of the steering arm 175 and the left and right front wheel end housings 13, 13 are connected by left and right rods 176, 176 (FIG. 1).

Therefore, if the turning operation member 34 is rotated, it is transmitted to the steering shaft, the steering transmission gear, the output shaft 174, the steering arm 175, the left and right rods 176, 176, and the left and right front wheel end housings 13, 13, so that the left and right The front wheels 10,10 of the steering wheel are turned to the left and right.

On the other hand, on the upper surface of the rear portion of the steering arm 175, an operating roller 177 is rotatably provided, and the left and right sides surrounding the operating roller 177 have a follower with a U-shaped notch 178 in plan view. The body 179 is rotatably supported on the bottom surface of the transmission case 12 .

In addition, left and right side clutch operating arms 86, 86 for operating left and right side clutches 87, 87 for side clutch shafts 586, 586 (FIG. 10) of the left and right rear wheels 11 are connected to the left and right side parts of the driven body 179. The front parts of the connected left and right rods 180, 180. In addition, the left and right side clutches 87, 87 are always on.

Therefore, if the rotation operation member 34 is rotated to the right by a predetermined amount (it has the meaning of turning the body to the right, the operator turns the amount to the right, for example, 200 degrees) or more, then the steering arm 175 also rotates to the right to move. The roller 177 rotates in the (I) direction, and in order to press the left side 178a of the cutout portion 178 of the driven body 179, the driven body 179 is rotated in the (II) direction, and the right lever 180 is pulled, and the right clutch operating arm 86 is operated. The right clutch 87 is thereby disengaged.

The turning operation member 34 , the output shaft 174 , the steering arm 175 , the operating roller 177 , the driven body 179 , the lever 180 , the side clutch operating arm 86 for clutch interlocking, and the like are referred to as a steering mechanism S. Since the right rear wheel 11 on the turning center side is in a floating state, the right rear wheel 11 does not damage the plow layer, and does not pick up a large amount of soil and cause the soil surface to be rough, and can smoothly turn to the right.

Conversely, if the turning operation member 34 is turned to the left by a predetermined amount or more, the steering arm 175 also turns to the left, and the action roller 177 turns in the direction opposite to (I). The right side 178b makes the driven body 179 rotate in the direction opposite to (II), pulls the left lever 180, the left side clutch operating arm 86 is operated and the left side clutch 87 is disconnected, and the left rear wheel 11 on the rotation center side Since it is in a floating state, it is possible to prevent the left rear wheel 11 from damaging the plow bed, and it is possible to smoothly perform a left turn without taking up a large amount of soil and causing a rough surface of the soil.

As described above, at the time of turning, the turning outer side clutch 87 is kept on, but only the turning inner side clutch 87 can be turned off.

FIG. 4( a ) shows an example of a top view of the display panel 80 , and FIG. 4( b ) shows an example of a top view of the operation panel 70 . In addition, FIG. 5 has shown the block diagram of the control apparatus 163 of the rice transplanter 1 of FIG. 1. As shown in FIG.

And, in the rice transplanter 1 of this embodiment, an operation panel 70 is provided near the rotary operation member 34 on the front cover 32 top, and the operation panel 70 is equipped with various switches, buttons, dials, etc., and the operation panel 70 A display panel 80 is provided above, and this display panel 80 displays operation information such as the operation operation position, operation, and operation control status of the rice transplanter 1 .

As shown in Figure 4, viewed from the operator's seat 31, the main transmission switching operation member 16 is arranged on the right side, the auxiliary transmission switching operation member 17 is arranged on the left side, and each ridge clutch (not shown) is arranged on the lower side. ) to carry out the on-off clutch switch 82. Ridge clutch switch 82 is arranged with the ridge clutch switch 82a of 1 row and 2 rows and the ridge clutch switch 82b of 3 rows and 4 rows on the left side, is arranged with the ridge clutch switch 82c of 5 rows and 6 rows and 7 rows and 82b on the right side. 8 rows of clutch switches 82d.

In addition, on the right side of the guide 17a of the sub-shift switching operation member 17, there is a rotary interlocking switch 90, which automatically performs the operation and lifting of the seedling planting part 4 and the operation of the fertilization device 5 in accordance with the rotation. The rotary interlocking mode of the rotary interlocking switch 90 is configured with a planting start adjustment dial 92, a height adjustment dial 94 of the soil preparation rotor, etc. on the upper side of the rotary interlocking switch 90.

In addition, the "planting" on the upper side of the monitor 83 of the display panel 80 lights up when the planting operation on-off part 25a in the planting clutch housing 25 is turned on, and the rotation interlocking lamp 84 lights up when the above-mentioned rotation interlocking mode is turned on. . The on-off state of the planting action on-off member 25a is detected by the planting action detection unit 25ab. In addition, the rotation interlocking lamp 84 is displayed as "rotation" as an example. In addition, when the ridge clutch is off, when the fertilizer from the fertilization device 5 is clogged, or when the fertilizer supply is exhausted, there are provided lamps, etc. that are turned on.

If it is in the rotation interlocking mode by the rotation interlocking switch 90, the rotation interlocking mechanism T will function. The so-called slewing interlocking mechanism T is specifically a mechanism, that is, when the slewing operation member 34 is operated to start slewing travel, the control device 163 switches the electromagnetic hydraulic valve 161 to shrink the lifting hydraulic cylinder 46 to plant the seedlings. Section 4 rises. Then, counting of the rotation speed difference between the left and right rear wheel rotation sensors 205, 205 provided on the rear wheel main shaft 341 is started, and the rotation speeds of the left and right rear wheel rotation sensors 205, 205 are counted from when the turning operation member 34 is operated to the turning end side. When the difference is less than a certain value, the electromagnetic hydraulic valve 161 is switched by the control device 163, the lifting hydraulic cylinder 46 is extended and the seedling planting part 4 is lowered, and if the rotating speed of the left and right rear wheel rotation sensors 205, 205 reaches the specified rotating speed, the The planting operation on-off component 25a is in the ON state. Further details are given below.

First, when the operator rotates the swivel operation member 34 by 200 degrees to either the left or right (the swivel operation member 34 is rotated by a maximum of 360 to 400 degrees to the left and right), the swivel travel is started. The control device 163 calculates the turning start time based on the detection result of the turning direction detection member 193 of the turning operation member 34 . In addition, the turning direction detection part 193 can detect not only the steering angle of the turning operation part 34 but also the turning direction. Furthermore, the turning direction detecting member 193 is a potentiometer provided on the steering shaft of the turning operating member 34 .

And, if start turning travel, then output signal from control device 163 and control the electromagnetic solenoid (not shown) that makes electromagnetic hydraulic valve 161 actuate, make seedling planting part 4 rise, and planting clutch motor 24 is actuated to the disengagement side. The planting action on-off member 25a is turned off. In addition, the above-mentioned steering mechanism S disengages the rotation inner side clutch 87 among the left and right side clutches 87 , 87 ( FIG. 10 ) built in the transmission case 12 .

And if start left and right rear wheel rotation sensor 205,205 the counting of rotational speed difference, and swing operation part 34 is operated to the turning end side and then the side clutch 87 of turning inner side is connected and left and right rear wheel rotation sensor 205,205 If the rotation speed difference is less than a certain value, the control device 163 controls the electromagnetic solenoid that operates the electromagnetic hydraulic valve 161 and lowers the seedling planting part 4, and if the rotation speeds of the left and right rear wheel rotation sensors 205, 205 reach a predetermined rotation speed, the The planting clutch motor 24 is turned on to turn on the planting operation on-off member 25a.

The on-off parts 25a of the planting action become on-state, the seedling planting utensils 52a of all the planting rows move, and the seedling-carrying platform 51 also starts to move left and right, and at the left-right moving end of the seedling-carrying platform 51, the seedling conveyor belts of all the planting rows 51b performs an action. As a transmission mechanism, the planting action on-off part 25a is transmitted to the seedling planting part 4 through the planting transmission shaft 26, and in the seedling planting part 4, it is transmitted to the corresponding seedling planting utensils 52a via each ridge clutch respectively. , respectively to the corresponding seedling conveying belt 51b through each seedling conveying clutch (not shown). As mentioned above, even if the operation of the seedling planting lever 19 (FIG. 2) is not performed, planting of a seedling starts automatically.

In addition, the fertilization device 5 also operates in conjunction with the raising and lowering of the above-mentioned seedling planting part 4, and its structure will be described later.

Next, the transmission structure of the left rear wheel gearbox 200L for transmitting the driving force from the transmission case 12 side will be described using FIGS. 6 and 7 . 6 is a schematic plan view showing the transmission structure of the transmission case 12 , the left rear wheel gearbox 200L, and the right rear wheel gearbox 200R, and FIG. 7 is an enlarged view of the left rear wheel gearbox 200L in FIG. 6 . In addition, in FIG. 6 and FIG. 7, arrows F, B, L, and R indicate the front side, the rear side, the left side, and the right side of the traveling vehicle body 2, respectively. The same applies to FIG. 8 described later.

As shown in FIGS. 6 and 7 , the ground leveling clutch mechanism 320 including the first input shaft 321L is configured to transmit power from the transmission case 12 side to the first input shaft 321L via the first transmission shaft 230L. The first bevel gear 321aL on the rear end side of the first input shaft 321L transmits to the second rotating shaft 340L to which the second bevel gear 330L is fastened, and transmits to the large-diameter gear through the small-diameter gear 331L fastened to the second rotating shaft 340L. 332L transmits, whereby the left rear wheel spindle 341L rotates.

Next, the structure of switching the driving force to the rotor transmission shaft 301 by the ground leveling clutch mechanism 320 will be described.

The ground leveling clutch mechanism 320 has at the front end: a first input shaft 321L; a ground leveling rotor on-off clutch 322 that is spline-connected to the first input shaft 321L in a slidable manner; 322 the booster spring 323 of booster; And overcome the active force of booster spring 323 and press the protrusion 324aL of the flange part 322a of ground leveling rotor on-off clutch 322, as shown in Figure 7, possess: make the ground leveling rotor on-off clutch 322 along the axial direction of the first input shaft 321L, the switching fork 324L that changes in the direction of the arrow E; The first gear 325 on the side.

And, on the surface of the first gear 325 side of the leveling rotor on-off clutch 322, a plurality of first clutch claws 322b are formed. The claws 322b are fitted to form a plurality of second clutch claws 325a. Moreover, the transmission force generated by the rotation of the first gear 325 is transmitted to the second gear 312 fastened to the rotor transmission shaft 301 via the chain 311 . Accordingly, the driving force is transmitted to the leveling rotor 27 side.

Also, the base portion 324b side of the switching fork 324L is connected to a switching interlocking mechanism 326a formed of a rod, wire, spring, etc., which is provided on the traveling vehicle body 2 side of the elevating link mechanism 3 . When the machine body is turning or retreating, or when the seedling planting part 4 is raised by the operation of the operator, if the lifting link mechanism 3 moves upward to a predetermined height, the switching link mechanism 326a operates the switching fork 324L, so that The ground leveling clutch mechanism 320 is in a disengaged state. Thereby, when the seedling planting part 4 ascends, the drive of the leveling rotor 27 can be stopped.

In addition, as described above, if the rotor transmission shaft 301 that transmits the driving force to the leveling rotor 27 side is disposed inside the body, the rotor transmission shaft 301 is located on the inside of the body rather than the left rear wheel gearbox 200L, and is disposed away from the body. The left rear wheel 11 is located on the outer side of the machine body than the left rear wheel gear box 200L. Therefore, the mud that jumps up due to the rotation of the rear wheel 11 is received by the left rear wheel gear box 200L, and it is difficult to transfer to the rotor. The flying of the transmission shaft 301 can prevent the oil seal of the rotor transmission shaft 301 from being damaged.

Lubricating oil for the internal gear mechanism is sealed in the left rear wheel gearbox 200L, and an oil seal is provided at the protruding portion of the rotor transmission shaft 301 . If the oil seal is damaged, the lubricating oil may leak out due to the rotation of the rotor transmission shaft 301 . However, according to the above configuration, the lubricating oil hardly leaks out.

In addition, the rotor transmission shaft 301 may be arranged below the left rear wheel gearbox 200L. As a result, the height of the leveling rotor 27 below the left rear wheel gearbox 200L becomes close to the height at which the leveling rotor 27 operates, and transmission loss of driving force can be prevented.

On the other hand, the rotor transmission shaft 301 may be arranged above the left rear wheel gearbox 200L. This prevents mud from scattering toward the rotor shaft 301 , so that damage to the oil seal due to the mud can be prevented, and the durability of the rotor shaft 301 can be improved.

Next, the transmission structure of the right rear wheel gearbox 200R for transmitting the driving force from the transmission case 12 side will be described using FIGS. 6 and 8 . FIG. 8 is a schematic plan view showing a driving force transmission structure inside the right rear wheel gearbox 200R.

As shown in FIG. 6, in the fertilization transmission mechanism 420, the structure is such that power is transmitted from the transmission case 12 side to the second input shaft 321R via the second transmission shaft 230R, and the power is transmitted from the rear of the second input shaft 321R. The first bevel gear 321aR on the end side transmits to the second rotating shaft 340R fastened with the second bevel gear 330R, and transmits to the large-diameter gear 332R via the small-diameter gear 331R fastened to the second rotating shaft 340R. The rear wheel spindle 341R rotates.

Next, the configuration of turning on and off the driving force to the fertilization transmission member 401 by the fertilization transmission mechanism 420 will be described.

The fertilization transmission mechanism 420 has at the front end: a second input shaft 321R; a fertilization transmission on-off component 422 that is slidably connected to the second input shaft 321R; The fertilization force spring 423 of the broken part 422 force; and overcome the force of the fertilization force spring 423 and press the protrusion 324aR of the fertilization flange part 422a of the fertilization transmission on-off part 422, as shown in Figure 8, possess: The fertilization transmission on-off component 422 is a switching fork 324R that changes in the direction of the arrow E along the axial direction of the second input shaft 321R; The third bevel gear 425 on the side opposite to the first bevel gear 321aR side.

And, a plurality of third clutch pawls 422b are formed on the surface of the third bevel gear 425 side of the fertilization transmission on-off component 422, and on the surface of the fertilization transmission on-off component 422 side of the third bevel gear 425, in order to be compatible with the third A plurality of fourth clutch claws 425a are formed by fitting the clutch claws 422b.

In addition, the root portion 324bR of the switching fork 324R is connected to the fertilization transmission driver 426a that cuts off the driving force of the fertilization device 5 via the cable 427, and the fertilization transmission driver 426a is used to switch the fertilization transmission in conjunction with the lifting of the seedling planting part 4. The structure of the on-off component 422 .

The planting clutch motor 24 is operated in accordance with the raising and lowering of the seedling planting unit 4 by the control device 163 , and the fertilization transmission driver 426 a is operated in accordance with the operation of the planting clutch motor 24 . However, it is configured that when the seedling planting part 4 descends (during planting operation), as shown in FIG. 5 , the fertilization transmission driver 426a is turned on and off by the fertilization transmission switch 428 to independently plant and fertilize the seedlings.

If the switching fork 324 is switched to one side, i.e. the right side of FIG. Since the clutch pawl 422 b is disengaged from the fourth clutch pawl 425 a , the driving force generated by the rotation of the input shaft 321 is not transmitted to the third bevel gear 425 . Therefore, the driving force is not transmitted to the fertilization device 5 side.

On the other hand, as shown in FIG. 8, if the switching fork 324 is switched to the other side, that is, the left side of FIG. 8, the third clutch claw 422b is fitted with the fourth clutch claw 425a, so that the driving force generated by the rotation of the input shaft 321 is transmitted to the third bevel gear 425. And, the transmission force generated by the rotation of the third bevel gear 425 is transmitted to the fourth bevel gear 412 fastened to the fertilization transmission member 401 . Thereby, the driving force is transmitted to the fertilization device 5 side.

In addition, the arrangement of the right rear wheel gearbox 200R and the left rear wheel gearbox 200L can also be reversed left and right, and the ground leveling clutch mechanism 320 can also be provided on the right rear wheel gearbox 200R, and the left rear wheel gear The box 200L is provided with a fertilization transmission mechanism 420 .

In addition, in the rice transplanter 1, it is characterized in that, when the turning interlocking mechanism T is functioning during turning travel, if the angle detecting member 162 detects that it is an angle at which the entire front and rear areas of the floating body 55 are in contact with the farmland surface. , then the fertilization transmission on-off component 422 is switched to the ON state, and the fertilization device 5 is driven by the fertilization transmission driver 426 a of the fertilization device 5 . In addition, when the fertilization transmission on-off member 422 is turned on, the blower electric motor 53 also operates simultaneously, thereby generating fertilizer conveying wind, and improving the fertilizer conveying efficiency.

And, it is characterized in that, when the angle detection part 162 detects that the floating body 55 leaves the farmland surface, that is, when it does not detect contact with the ground, the fertilization transmission on-off part 422 is in a disconnected state through the fertilization transmission driver 426a, and the blower electric motor 53 It operates in conjunction with each other, and does not drive the fertilization device 5 . FIG. 9 shows a flow chart at this time.

If it is detected by the angle detection part 162 that the floating body 55 is in contact with the farmland surface, then the on-off state of the fertilization drive at this point in time is judged, and when the fertilization device 5 is operated, this state is maintained. 5, when not in operation, switch the drive to operate the fertilization transmission driver 426a.

In addition, it is configured such that when the floating body 55 is not detected to be in contact with the farmland surface by the angle detection member 162, that is, when separation is detected, the on-off state of the fertilization drive at this point is judged and switched when the fertilization device 5 is in operation. Drive it to a stop. On the other hand, when the fertilization device 5 is not operating, this state is maintained. The on-off state of the fertilization drive is determined by setting a sensor (not shown) that detects the on-off state of the fertilization drive on-off part 422 on the fertilization drive on-off part 422, or by the on-off state of the fertilization drive switch 428.

As detected by the angle detection part 162, it can be regarded as the angle at which the floating body 55 leaves the farmland surface. ~ 5 degrees or more can be. Furthermore, since the vertical rotation fulcrum of the floating body 55 is at the rear of the floating body, this angle is expressed in consideration of being negative when the front end of the floating body 55 falls from the reference value, and positive when rising.

If it is detected by the angle detection part 162 that the floating body 55 leaves the farmland surface, the fertilization device 5 stops, and if the seedling planting part 4 starts to rise, the supply of the fertilizer from the fertilization device 5 stops, so it can be prevented from being discharged at a position away from the farmland surface. fertilizer, thereby preventing the spreading of excess fertilizer.

In addition, if the angle detecting member 162 detects that the floating body 55 is in the grounded state, the fertilization device 5 is operated, so that the fertilization device 5 can be operated before the planting of the seedlings after rotation is started, and the application of fertilizers can be started. Since it is transported, fertilizer is supplied to the farmland when the planting of the seedlings after rotation starts. Therefore, it is possible to prevent the occurrence of a section where no fertilizer is supplied. In addition, since the fertilizer is supplied with the floating body 55 in contact with the ground, it does not deflect in the air.

In addition, regarding the stoppage of the operation of the fertilizing device 5 when the seedling planting part 4 rises, it is also possible to make the following structure, that is, not by the angle detection member 162, but by the planting operation detection member that detects the on-off of the planting operation on-off member 25a. When 25ab detects the off state of the planting operation on-off member 25a, the fertilization transmission driver 426a becomes the off state, and thus the operation of the fertilization device 5 stops.

After the planting device 52 is stopped after the planting operation on-off member 25a is disconnected, by stopping the fertilizing device 5, the fertilizing hose 62 from the fertilizing device 5 can be moved to the field surface during the period when the seedling planting part 4 rises to the maximum position. Since more fertilizer is supplied to the farmland, it is possible to prevent excessive fertilizer supply at the start of fertilizer supply after rotation, and to prevent excessive fertilizer supply.

In addition, when the seedling planting unit 4 descends, as described above, if the angle detection member 162 detects that the floating body 55 is in the grounded state, the fertilization device 5 is operated, thereby preventing the generation of the interval where no fertilizer is supplied and the fertilizer being in the air. Sow and spread.

These controls are performed by the control device 163, and are configured as follows, that is, as shown in FIGS. Based on the detected result or the result detected by the planting operation detecting unit 25ab, the operation stop of the fertilizing device 5 when the seedling planting part 4 is raised can be selected according to working conditions, field conditions, and the like. If the selection switch 432 is operated to the left, it will be based on the result detected by the angle detection unit 162, and if it is operated to the right, it will be based on the result detected by the planting operation detection unit 25ab.

In addition, as described above, the fertilization transmission mechanism 420 and the fertilization transmission member 401 are provided on the left and right rear wheel gearboxes 200 (in the illustrated example, the right rear wheel gearbox 200R), and are configured to communicate with each other via the planting clutch housing 25. And plant transmission shaft 26 to the planting transmission mechanism that seedling planting portion 4 transmits the independent fertilization transmission mechanism.

That is, since the drive of the fertilizing device 5 can be turned on and off independently, the start and end of fertilizer supply can be operated regardless of whether the planting device 52 is turned on or off, and it is possible to prevent excessive fertilizer supply and a section where no fertilizer is supplied.

Furthermore, a fertilization transmission switch 428 for on-off operation of the fertilization transmission mechanism 420 is provided on the operation panel 70, and the fertilization device 5 can also be operated by the fertilization transmission driver 426a when the operator presses the fertilization transmission switch 428 .

And, the fertilization transmission mechanism 420 is turned on and off by the fertilization transmission driver 426a operating based on the on-off operation of the fertilization transmission switch 428, the detection result of the angle detection part 162, the detection result of the planting operation detection part 25ab, etc. (fertilization transmission function) , so that the on-off of the fertilization transmission mechanism 420 is easy to automate, so the work efficiency can be improved, and the on-off of the fertilization device 5 can be reliably performed.

In addition, as shown in FIG. 6 , by arranging the fertilization transmission member 401 that transmits the driving force to the fertilization device 5 side inside the machine body, that is, it is arranged opposite to the side where the rear wheel 11 is provided with the right rear wheel gearbox 200R as a reference. Therefore, the earth that jumps up due to the rotation of the rear wheel 11 is received by the body outer surface of the right rear wheel gearbox 200R, so that the earth can be prevented from adhering to the fertilization transmission part 401 .

On the other hand, by arranging the fertilization transmission part 401 on the outside of the body, that is, the fertilization transmission part 401 is arranged on the rear wheel 11 side (right side) with the right rear wheel gearbox 200R as a reference, so that the operator can easily access the fertilization from the rear wheel. Since the maintenance of the fertilization transmission part 401 and its periphery is performed on the 11 side, that is, the outside of the machine body, the workability of maintenance is improved.

In addition, by arranging the fertilization transmission member 401 above the right rear wheel gearbox 200R, the distance from the fertilization device 5 disposed on the traveling vehicle body 2 to the transport unit 61 can be shortened, thereby suppressing transmission loss of driving force.

In addition, if the fertilization transmission driver 426a is disposed above the right rear wheel gearbox 200R and below the bottom pedal 35, it is difficult for the soil jumped up by the rotation of the rear wheel 11 to reach the fertilization transmission part 401, and it is possible to prevent the soil from adhering to the fertilization transmission part 401. On the fertilization transmission part 401.

In addition, it is also possible to install a rod (not shown) on the lower link 41 of the lifting linkage mechanism 3, and connect the rod to the root 324bR of the switching fork 324R via a cable 427, so that it has an on-off component 422 for fertilization transmission. The function of on-off operation.

In addition, a configuration may be adopted in which the manual operation member 426 is attached to the fertilization transmission member 401 so that the fertilizer can be conveyed manually. Fig. 8 shows the structure in which the fertilization transmission part 401 protrudes to the inside (i.e. the left side) of the rear wheel gearbox 200R on the right side, but if the fertilization transmission part 401 is protruded to the outside (i.e. the right side) of the rear wheel gearbox 200R on the right side side) protrudes, and the manual operation part 426 is assembled on the protruding part, then the fertilization device 5 can be manually operated to supply fertilizer.

The operator changes the fertilizer supplied from the fertilization device 5 according to the composition of the field and the crops to be cultivated, and the specific gravity of the fertilizer differs depending on the composition. Therefore, even if the setting of the supply amount of fertilizer of the fertilization device 5 is the same, the amount of the actually supplied fertilizer may be more or less than the setting, and the supply amount of the fertilizer supplied to the farmland may be more or less. Case. In order to prevent this, it is necessary to operate the fertilization device 5 before planting seedlings in the farmland, and perform a so-called "experimental transport" operation to confirm the amount of fertilizer discharged from the fertilization device 5 within a predetermined period of time. The amount is set in advance as an amount suitable for the working conditions.

On the other hand, the fertilization device 5 is a structure that does not drive if the seedling planting part 4 is not driven. Therefore, when performing the "experimental transport" operation, it is necessary to carry out the seedlings before placing the seedlings on the seedling planting part 4, or to temporarily remove the seedlings. There is a problem that it takes extra work time to detach from the seedling planting part 4 . Moreover, if a seedling is placed on the seedling planting part 4, there exists a problem that a seedling will be scraped at the time of experimental conveyance, and a seedling will be consumed excessively. In addition, since the engine needs to be operated, there is a problem that excess fuel is consumed and fuel consumption increases.

However, as described above, if one end of the fertilization transmission member 401 protrudes to the right from the right rear wheel gearbox 200R, and the manual operation member 426 is attached to the protruding portion, fertilization can be performed manually. The "experimental delivery" operation of device 5.

Therefore, when the operator manually operates the manual operation member 426 to perform the "experimental transportation" work, excessive fuel consumption of the traveling vehicle body 2 can be suppressed and fuel consumption can be reduced.

In addition, by installing the manual operation member 426 near the rear wheel gearbox 200R on the right side and on the protruding part of the fertilization transmission member 401, the supply distance of the driving force to the fertilization device 5 at the rear of the body can be shortened. The transmission loss of the driving force is small, the work efficiency is improved, and the force of operating the manual operation member 426 can be reduced, so the labor of the operator can be reduced.

In addition, when the rear wheel 11 on the side of the right rear wheel gearbox 200R with the fertilization transmission member 401 is installed is turned and travels in such a way that the rear wheel 11 turns inside, the rear wheel 11 on the left side of the rear wheel gearbox 200L without the fertilization transmission member 401 is not installed. The rear wheel 11 has a structure in which the operation timing of the fertilization transmission driver 426a after turning is earlier than when the rear wheel 11 is turned inside.

During turning travel, the turning inner side clutch 87 is disengaged by the above-mentioned steering mechanism S, so that transmission of the driving force to the right rear wheel gearbox 200R located on the turning inner side is disengaged. Therefore, when turning to the right side where the fertilization transmission member 401 is provided, the rotation speed of the fertilization transmission member 401 when the fertilization transmission on-off member 422 is turned on is lower than when turning to the left side, so there is the following problem. That is, the timing at which the fertilization device 5 operates is delayed, and the fertilizer supply start position changes depending on the direction of rotation, resulting in a position where no fertilizer is supplied.

However, by making the operation timing of the fertilization transmission driver 426a after turning to the right earlier than that after turning to the left, the rotation speed of the fertilization transmission member 401 that starts the fertilization transmission after turning can be reliably ensured, so it is independent of the direction of rotation. It is possible to stabilize the timing at which the supply of fertilizer is started, and it is possible to prevent a period in which no fertilizer is supplied.

In the above description, since the fertilization transmission member 401 is provided in the right rear wheel gearbox 200R, the operation timing of the fertilization transmission driver 426a is made earlier by the control device 163 when turning to the right than when turning to the left. control. Specifically, by setting the turn-on time of the rotation pulse of the fertilization transmission member 401 after the floating body 55 touches the ground during the clockwise rotation to be shorter than that during the counterclockwise rotation, the fertilization transmission driver 426a is activated at an earlier time, thereby Make the fertilization drive on-off component 422 in the on state.

When turning right, the output rotational speed of the fertilization driving of the rear wheel gearbox 200R to the right decreases with the disengagement of the side clutch 87 on the right. With this configuration, the drive of the fertilization device 5 can be made constant regardless of the direction of rotation.

In addition, when the operator neutralizes the auxiliary transmission switching operation member 17 along the lever guide 17a, as shown in FIG. The operation of the planting device 52 is stopped by operating the planting clutch motor 24 to the OFF side to turn the planting operation on-off member 25 a into the OFF state (stop function). On the other hand, if the auxiliary transmission switching operation member 17 is operated to the stop planting position W beside the neutral position, the driving force can be applied to the left and right front wheels 10, 10 and the left and right rear wheels 11, 11 of the traveling vehicle body 2. The planting device 52 is actuated in a state where the supply of the plant is stopped. Call it "stop planting".

A planting stop position detection member 430 serving as a sensor switch is provided at the planting stop position W, and when the sub-shift switching operation member 17 is operated, it is turned on and a signal is input to the control device 163 . Then, a signal for operating the planting clutch motor 24 to the on side is output from the control device 163, the planting operation on-off member 25a is turned on, and the planting device 52 operates. This is called the stop planting function.

The auxiliary transmission switching operation member 17 is configured such that it is always biased from the planting stop position W to the neutral position N side by means of an urging member such as a torsion spring not shown in the figure, and when the operator leaves the auxiliary transmission switching operation member 17, Immediately return to neutral position N. Thus, if the operator does not intentionally operate the auxiliary transmission switching operation member 17 to the planting stop position W, the auxiliary transmission switching operation member 17 is not detected by the planting stop position detection member 430 and the planting device 52 does not operate.

FIG. 10 shows a top view of the transmission mechanism for transmission to the driving wheels in the transmission case 12 . The transmission shafts are not actually arranged on the same plane, but for the description of the transmission mechanism, they are shown as being arranged on the same plane. In addition, in FIG. 10 , the upper direction of the drawing is the right side of the vehicle body, and the lower direction is the left side of the vehicle body.

The gearbox body 12 receives the rotational power from the continuously variable transmission device 23 through the gearbox input shaft 583, and the left and right front wheels 10, 10 and the left and right rear wheels 11, which are drive wheels, are connected via the auxiliary transmission device 571, the differential device 585, and the like. , 11 to drive.

The sub-transmission device 571 has a mechanism for switching the running state of the traveling vehicle body 2 to "planting operation speed", "on-road speed" and "traveling neutral". Switching part 573, planting speed transmission part 574, speed transmission part 575 on the road and intermediate shaft 576 that are contained in this auxiliary transmission switching shaft 572 constitute. The running state is changed by changing the ratio of the rotational speeds of the relay shaft 576 and the auxiliary transmission switching shaft 572 . The sub-transmission switching shaft 572 and the switching member 573 are splined so as to be movable in the axial direction of the sub-transmission switching shaft 572, and the switching member 573 is actuated by an operator operating the sub-transmission switching operation member 17, thereby A structure for switching the traveling state of the traveling vehicle body 2 .

The relay shaft 576 has two gears with different diameters, one of which receives the rotational power from the gearbox input shaft 583 . Among the two gears, the gear with the largest diameter is the on-road speed transmission part 575, which meshes with the gear of the switching part 573 when the operating position of the auxiliary transmission switching operation part 17 is "on-road speed". The little gear of diameter always meshes with planting speed transmission part 574. Through this engagement, the relay shaft 576 transmits power to the planting speed transmission member 574 and the on-road speed transmission member 575 .

The planting speed transmission part 574 meshes with the gear with a small diameter of the relay shaft 576 and is arranged on the right side coaxially with the auxiliary transmission switching shaft 572 . The planting speed transmission member 574 and the auxiliary transmission switching shaft 572 are configured to be rotatable relative to each other via metal bearings. And the planting main transmission shaft 582 which transmits the driving force to the seedling planting part 4 is coupled to the planting speed transmission member 574 so that coaxial rotation is possible. Thereby, the planting main transmission shaft 582 and the sub-transmission switching shaft 572 are coaxial and can rotate relative to each other.

On the right side of the switching member 573, an engaging portion of a dog clutch coupled with the planting speed transmission member 574 is provided, and teeth for meshing with the on-road speed transmission member 575 are formed on the outer periphery.

A part of the rotational power from the auxiliary transmission switching shaft 572 is distributed and transmitted to the left and right front wheel axles 584, 584 through the differential device 585, and is transmitted to the front wheel end housings 13, 13 through the front wheel axles 584, 584 to forward The wheels 10, 10 are driven. And the power for driving the rear wheels taken out from the back of the transmission case 12 via the left and right front wheel axles 584, 584 is transmitted to the rear wheel gearboxes 200L, 200R via the rear wheel propeller shafts 230L, 230R, and is then transmitted to the rear wheels 11, 11. to drive. On the transmission case 12 , on the left side of the auxiliary transmission switching shaft 572 , there is provided a brake device 581 that restricts the rotation of the front wheels 10 , 10 and the rear wheels 11 , 11 .

FIG. 11 is an explanatory view showing the operation of the auxiliary transmission mechanism in the transmission case 12 of FIG. 10 . Fig. 11(a) is a diagram showing the engagement when the operation position of the auxiliary transmission switching operation member 17 is "road speed", and Fig. 11(b) is a diagram showing the engagement when the operation position of the auxiliary transmission switching operation member 17 is "neutral". , FIG. 11(c) shows a diagram of meshing when the operation position of the sub-speed switching operation member 17 is "planting operation speed". In addition, also in FIG. 11 , the upper direction of the drawing is the right side of the vehicle body, and the lower direction is the left side of the vehicle body.

At the time of "on-road speed", the teeth on the outer periphery of the switching member 573 mesh with the teeth on the on-road speed transmission member 575 of the relay shaft 576 . According to this configuration, the rotational power is transmitted to the switching member 573 , the auxiliary transmission switching shaft 572 meshed with the switching member 573 through the spline rotates together with the switching member 573 , and is transmitted to the differential device 585 by the gear located on the left side of the switching member 573 rotational power. At this time, although the planting speed transmission member 574 is rotated by the relay shaft 576 , it rotates at a rotational speed different from that of the relatively rotatable auxiliary transmission switching shaft 572 .

During "neutral", the switching part 573 is not engaged with any one of the planting speed transmission part 574 and the speed transmission part 575 on the road. Although the planting speed transmission member 574 is rotated by the relay shaft 576, the auxiliary transmission switching shaft 572 that does not transmit rotational power still stops. At this time, only the seedling planting part 4 can be operated by combining the planting speed transmission member 574 and the planting main transmission shaft 582 so that coaxial rotation is possible. The same mechanism also applies when the auxiliary transmission switching operation member 17 is operated to the planting stop position W.

During " planting working speed ", the right side of switching part 573 is meshed with the left side of planting speed transmission part 574 by claw clutch, and is mutually linked. The planting speed transmission part 574 rotates through the relay shaft 576, the switching part 573 connected by the dog clutch rotates, and the auxiliary transmission switching shaft 572 meshed with the switching part 573 through the spline rotates, and thus the rotational power is transmitted from the relay shaft 576 to the auxiliary gear. The speed change switching shaft 572 transmits rotational power to the differential device 585 via a gear located on the left side of the switching member 573 .

In addition, when the sub-speed switching operation member 17 is in the neutral position N, the transmission to the seedling planting part 4 is cut off by the planting action on-off part 25a, so that the transmission to the seedling planting part 4 is cut off. Therefore, even when it is in the neutral position N, when the planting operation on-off member 25a is connected, that is, it becomes an ON state, the seedling planting part 4 will be in a drive state. Thus, if the sub-speed switching operation member 17 is operated to the planting stop position W, the planting operation on-off member 25a becomes on in the state of maintaining the above-mentioned "traveling neutral", so the planting device 52 is placed on the rice transplanter 1. Operates while stopped.

12 to 15 show diagrams (schematic diagrams) of transmission mechanisms corresponding to the operating positions of the auxiliary transmission switching operation member 17 .

When the operating position of the auxiliary transmission switching operation member 17 shown in FIG. 12 is the on-road speed and the planting operation speed shown in FIG. All the clutches of the planting system, fertilization system, etc. are in the ON state. However, when running on the road, it basically becomes non-working driving, so the seedling planting part 4 rises, and the planting operation on-off part 25a, the fertilization transmission on-off part 422 and the soil leveling rotor on-off clutch 322 become disconnected.

Moreover, when the operation position of the auxiliary transmission switching operation member 17 shown in FIG. 14 is neutral, it does not transmit the driving force to the traveling system, and therefore does not transmit the driving force to the land preparation system and the fertilization system downstream of the transmission. In addition, since the planting operation on-off member 25a is also in the OFF state, the traveling is stopped, and the planting device 52, the fertilizing device 5, etc. are also in a non-operating state.

On the other hand, when the operation position of the auxiliary transmission switching operation member 17 shown in FIG. 15 is to stop planting, the transmission to the traveling system becomes the disconnected state as in the neutral state, but the planting operation on-off member 25a is in the connected state. , so the power from the engine 20 is transmitted to the planting system, and the planting device 52 operates. In addition, since the driving force is not transmitted to the traveling system, the driving force is not transmitted to the fertilization system and the soil preparation system branched from the right rear wheel gearbox 200R.

As described above, if the auxiliary transmission switching operation member 17 is operated to the stop planting position W, the planting operation can be performed in a state where the running is stopped, so in the state where the seedling planting part 4 is lowered at the head of the field, one plant can be planted. A large number of seedlings are needed, so the workability is excellent, and it is not necessary to replant the seedlings manually, which can reduce the labor of the operator.

When seedling planting starts, if the position where the planting device 52 plants the first seedling does not coincide with the planting end position of the adjacent row, the seedlings can be planted without moving on the spot, thereby improving the planting accuracy of the seedlings. Especially, at the corner of the farmland, when the machine body is rotated by 90°, the position is easy to be confused, and the seedling can be reliably planted at the position where the seedling can be planted.

Usually, it is necessary to drive when planting seedlings. When planting seedlings without moving on the spot, it is necessary to perform driving start, stop, and planting on-off operations in advance. It is difficult for unskilled personnel, but according to this structure, anyone can I can easily plant a seedling.

However, if the seedling planting operation is carried out in a state where the floating body 55, the intermediate floating bodies 57, 57, and the side floating bodies 56, 56 do not touch the ground, it is possible to move the seedling planting tool 52a above the farmland surface and cause Make the seedlings fall. Therefore, it is configured such that the planting device 52 does not operate even if the auxiliary transmission switching operation member 17 is operated to the planting stop position W if the floating body 55 is not detected to be in the grounded state by the angle detection unit 162 . Call it the stop seeding invalidation function.

According to this structure, it can prevent that a seedling falls above a farmland surface by erroneous operation, and can prevent consumption of an unnecessary seedling.

In addition, in the rotation interlocking mode, by enabling the above-mentioned stop planting function and stop planting invalidation function, it is possible to prevent planting devices such as aerial planting of seedlings, that is, separation of seedlings above the field surface, etc., during the turning of the field head. 52 misoperations. Fig. 16 shows this flowchart.

In the rotation interlocking mode in which the planting stop position detection part 430 detects that the auxiliary transmission switching operation part 17 is at the planting stop position W (precondition), and the rotary interlocking switch 90 is turned on at this time, and the angle detection part 162 When it is detected that the floating body 55 is a grounded state, the planting function is effectively stopped (permission), and the planting clutch motor 24 is output from the control device 163 to the signal of the side action, and the planting action on-off part 25a is connected to carry out the planting of seedlings.

On the other hand, when not in the rotation interlocking mode, or when the floating body 55 is in a disengaged state, the planting stop function does not work (prohibited), and a signal is output from the control device 163 to make the planting clutch motor 24 move to the disconnected side, and planting is performed. Since the operation on-off member 25a is off, the seedlings are not planted.

As described above, whether or not the planting operation (suspension of the planting operation) in the state where the traveling vehicle body 2 is stopped depends on the grounding of the floating body 55 , thereby preventing a decrease in working efficiency.

In addition, the planting stop function may be configured so that it does not operate when the brake pedal 110 shown in FIG. Fig. 17 shows this flowchart.

The operation amount of the brake pedal 110 , that is, the depression amount is detected by a brake pedal sensor 110 a provided at the base of the brake pedal 110 shown in FIG. 5 . The brake pedal sensor 110a may be of a type that contacts when stepped on to a certain extent, but may be a stroke sensor or the like. By stepping on this brake pedal 110, the planting stop function does not work, and it can prevent the misoperation when the rice transplanter 1 stops, and it is safe.

In addition, this rice transplanter 1 switches the output of the continuously variable transmission device 23 by operating the main transmission switching operation member 16 to drive the trunnion electric motor 103 ( FIG. 5 ) in the forward rotation or reverse rotation direction (changing the continuously variable transmission The rotation speed and the direction of rotation of the output shaft of the device 23), so that the structure can be shifted, and the drive command is output to the trunnion electric motor 103 in accordance with the operation position of the main shift switching operation member 16 detected by the main shift operation amount detecting member 16b. The structure of the signal. The trunnion electric motor 103 is provided outside the continuously variable transmission device 23, and operates in conjunction with the operation amount of the main transmission switching operation member 16 detected by the main transmission operation amount detection member 16b.

In addition, the trunnion electric motor 103 operates and rotates a trunnion arm (not shown) that rotates the trunnion 295 and is directly connected to the trunnion 295 until the rotation angle of the trunnion 295 becomes a predetermined angle. The rotation direction and the rotation angle of the trunnion 295 are detected by the trunnion detection part 113 provided on the trunnion arm.

And, also can be following structure, namely, when the rotation interlocking switch 90 is turned on rotation interlocking mode, even if the floating body 55 is detected by the angle detection part 162 is grounded state, Fig. 4 (a) ~ Fig. 4 ( When the operating position of the main transmission switching operation member 16 shown in b) is also in the neutral position 16aa, and the trunnion 295 is also in the neutral position, the planting stop function is valid. Call it the stop planting neutral function. Fig. 18 shows this flowchart.

In the rotary interlocking mode in which the rotary interlocking switch 90 is turned on, if the angle detection part 162 detects that the floating body 55 is in a grounded state, and the main transmission switching operation position of the operating part 16 detected by the main transmission operation amount detection part 16b It is a neutral position, and it is detected that the trunnion 295 is a neutral position by the trunnion detection part 113, then the stop planting function is valid (allowed), if the auxiliary transmission switching operation part 17 is operated to the stop planting position W, the planting action on-off part 25a becomes ON state, and planting of a seedling is performed.

On the other hand, when the operation position of the main transmission switching operation member 16 detected by the main transmission operation amount detection member 16b is not the neutral position 16aa, or based on the rotation direction and rotation angle of the trunnion 295 detected by the trunnion detection member 113 When not the neutral position 16aa, even if the sub-speed switching operation part 17 is operated to the stop planting position W, the stop planting function does not work (prohibition), and the planting action on-off part 25a is in an off state, so the planting of seedlings is not carried out.

As described above, if the traveling of the traveling vehicle body 2 is not completely stopped, the planting operation will not be performed, thereby preventing malfunction of the planting device 52 . For example, during the planting operation (working travel), even if the auxiliary transmission switching operation member 17 is operated to the planting stop position W due to misoperation, the auxiliary transmission switching operation member 17 is operated to a position where it is in contact with the planting stop position detection member 430. On the other hand, there is no change in the running of the planting operation of the seedlings, so it is possible to prevent the reduction of the working efficiency and the planting accuracy of the seedlings due to misoperation.

In addition, the planting of the seedlings at this time may be performed by turning the trunnion 295 at a predetermined angle and then turning the planting operation on-off member 25a into the ON state. Fig. 19 shows this flowchart.

That is, when the operation position of the main shift switching operation member 16 detected by the main shift operation amount detecting member 16b is at the neutral position, and when the trunnion 295 detected by the trunnion detecting member 113 is at the neutral position, the function of stopping planting is enabled, and from The control device 163 outputs a signal for operating the planting clutch motor 24 to the ON side. The controller 163 is configured to output an actuation signal to the trunnion electric motor 103 after judging by the control device 163 that it has a planting stop function, and the trunnion 295 reaches a predetermined angle (target value), and then outputs an actuation signal to the planting clutch motor 24. And the fertilization transmission driver 426a is operated, and the fertilization transmission on-off member 422 is turned on. This is called a planting stop operation function.

By increasing the output of the continuously variable transmission device 23 to a predetermined value and then supplying driving force to the planting device 52, the planting device 52 can be reliably operated while the running is stopped, and the planting accuracy and fertilization accuracy can be improved.

If it is the processing flow of first turning on the planting action on-off part 25a and then outputting to the trunnion electric motor 103 of the trunnion 295, then it is a control process in which the rotational speed of the seedling planting utensil 52a of the planting device 52 becomes faster gradually, and the operation unstable. However, according to this configuration, the rotation speed of the seedling planting tool 52a is smoothly rotated from the beginning and stabilized by turning on the planting operation on-off member 25a after outputting to the trunnion electric motor 103 .

That is, if the output of the continuously variable transmission device 23 is rising, the rotation speed of the seedling planting tool 52a also increases step by step, and the operation of the seedling planting tool 52a becomes unstable. However, as in this structure, when the continuously variable transmission device When the output of 23 reaches a certain value, the rotation speed of the seedling planting tool 52a is stabilized immediately, and it becomes a smooth operation.

In addition, it is configured such that during the on-off processing of the planting operation on-off member 25a when the signal for operating the planting clutch motor 24 to the ON side is output after the previous trunnion 295 reaches the target value, the planting operation When the on-off member 25a becomes the on-state (equivalent to the "continuously variable transmission forward output" of Fig. 22 described later and "during the time when the planting connection delay time expires"), the control is stopped, and the output causes the planting clutch motor 24 to The signal of the disconnecting side action makes the planting action on-off component 25a disconnected. After this control is stopped, the ON time of the stop planting position detection member 430, that is, the time for pressing the sub-shift switching operation member 17 to the stop planting position W is calculated within a time not shown, which is too short.

Make the following structure, that is, even in the on-processing of the planting operation on-off member 25a, also by returning the planting operation on-off member 25a to the off state after the control is stopped, to prevent the operation member 17 from switching every time the auxiliary transmission is switched. When contacting with the stop planting position detection component 430, the planting action on-off component 25a is switched on and off, which can prevent malfunction.

And, make following structure, promptly, when stopping control in the on-off process of this planting operation on-off member 25a, when making planting operation on-off member 25a be in off state, after planting operation on-off member becomes off state, make After the seedling planting tool 52a rotates for a certain period of time (for example, about 0.5 to 2 seconds) (rotating with inertia), it outputs to the trunnion electric motor 103 to make the trunnion 295 change from the previous target value (can ensure the stepless speed change when the planting operation is stopped). The rotational position of the trunnion arm of the output of the device) becomes the neutral position.

If the trunnion 295 is in the neutral position and then the planting operation on-off member 25a is in the disconnected state, the driving force will not be supplied to the seedling planting utensil 52a, and the stop position is the position at this time, so the seedling planting utensil 52a is in the normal stop. The location does not stop.

Then, the seedling planting tool 52a is stopped at the regular stop position by turning the seedling planting tool 52a for a certain period of time after the planting operation on-off member 25a is turned off. This normal stop position is designed by the gear combination inside the seedling planting tool 52a. Therefore, the stop position of the seedling planting tool 52a becomes stable.

Then, after the process of setting the trunnion 295 in the neutral position after the planting operation on-off member 25a is turned off, the planting clutch motor 24 is operated to turn the planting operation on-off member 25a on. The operator sometimes forgets to turn on the planting operation on-off member 25a when starting work after operating the sub-speed switching operation member 17 to the stop planting position W and planting a seedling of one plant. However, after the planting operation is stopped, the planting operation on-off member 25a is automatically turned on, so that the operation can be restarted by traveling at the planting speed.

In addition, a specific flow chart of the planting stop function when the auxiliary transmission switching operation member 17 is operated to the planting stop position W is shown below.

FIG. 20 shows a schematic flowchart of processing to stop the planting function. There are 5 types of this process, ie stop planting process 0 to 4, and they are performed in order of 1, 2, 3, 4 from stop planting process 0. Fig. 21 shows the flow process of stopping planting process 0, Fig. 22 shows the flow process of stopping planting process 1, Fig. 23 shows the flow process of stopping planting process 2, Fig. 24 shows the flow process of stopping planting process 3, Fig. 25 shows the flow process of stopping planting process 4.

In the stop planting process 0 of FIG. 21 , when the operating position of the main shift switching operation member 16 is a neutral position and the operation position of the auxiliary shift switching operating member 17 is also a neutral position, the stop planting function is valid (permitted), and becomes a standby position. state. In addition, when it is detected by the planting stop position detection unit 430 that the auxiliary transmission switching operation member 17 has been operated to the planting stop position W, the planting stop process 1 is set. Then, the control device 163 sets the planting ON delay time (predetermined time, for example, 1 second) of the signal to activate the planting clutch motor 24, and then moves to the flow of the planting stop process 1 in FIG. 22 .

In the planting stop process 1, the trunnion electric motor 103 is rotated forward (advance side), and the trunnion 295 of the continuously variable transmission device 23 is rotated. In addition, at this time, the position of the main transmission switching operation member 16 is still at the neutral position, and the seedling planting unit 4 is in a power transmission state by only turning the trunnion 295 to the forward side by the trunnion electric motor 103 .

And, after passing through the setting time of previous planting connection delay time (time is up), set and stop planting process 2, set the action time (such as 1～2 seconds) that planting action on-off part 25a is connected, from control device 163 outputs a signal for operating the planting clutch motor 24 . And next, it moves to the flowchart of the planting stop process 2 of FIG. 23.

In stop planting processing 2, planting clutch motor 24 is operated and planting operation on-off member 25a is turned on state and set stop planting process 3, then move to the flow chart of stop planting process 3 of Fig. 24. And, in stop planting process 3, set stop planting process 4 after passing through the previous action time (when time is up), set the time until the trunnion 295 is returned to the neutral position after the planting action on-off member 25a becomes the disconnected state (for example 1-2 seconds), make the planting operation on-off member 25a in the off state, and then move to the flow chart of the stop planting process 4 of FIG. 25 .

In the planting stop process 4, when the time elapses until the previous trunnion 295 is returned, the trunnion 295 turns from the advancing side to the stopping side, and then becomes a neutral position, and the flow chart ends.

The following FIGS. 26 and 27 show the overall flow of the respective flow charts described above. When the seedling planting tool 52a of the planting device 52 rotates once at the end of the planting operation, or stops after the time for planting the seedlings has passed, and when the operation of the sub-speed switching operation member 17 is stopped midway, FIG. 26 shows the flow of the former Fig. 27 shows a flowchart of the latter. In addition, FIG. 27 shows not only the latter but also the overall flow.

In FIG. 26, when the trunnion 295 of the continuously variable transmission device 23 rotates to the forward side or the reverse side, when the planting process is not stopped, the normal continuously variable transmission device output process is performed. That is, the driving force corresponding to the operating position of the main transmission switching operation member 16 is output. On the other hand, in the planting stop process (any one of the above-mentioned processes 0 to 4), when the trunnion 295 is output to the stop side by the trunnion electric motor 103 (corresponding to the "continuously variable transmission stop" in FIG. 25 Output "), it is judged whether the trunnion 295 is in the neutral position, if the trunnion 295 is detected to be in the neutral position by the trunnion detection part 113, then the stop planting process ends.

And, once stop planting processing finishes, judge whether to have carried out stop planting process 4, when having carried out stop planting process 4, make planting clutch motor 24 actuate and planting operation on-off member 25a becomes ON state. In the state of FIG. 26 , the planting of the seedlings is basically performed normally, so after the stop planting process is completed, the process moves to the normal planting work. At this time, if the planting operation on-off member 25a is still in the off state, then there is a possibility that the planting start will be delayed when the running starts, so finally enter the process of switching the planting operation on-off member 25a to the on state.

By making the planting operation on-off member 25a in the ON state, if the auxiliary transmission switching operation member 17 is operated to the position of the planting operation speed, and the main transmission switching operation member 16 is operated to the forward side, the planting operation can be started immediately. Then, stop planting process 0 is set, and the next stop planting process is newly set in order to start from stop planting process 0.

In addition, when outputting the trunnion 295 to the advancing side (or the retreating side) even during the planting stop process, the output is at a constant opening (previous target value).

In FIG. 27 , firstly, in the planting stop process in which the auxiliary transmission switching operation member 17 is operated to the planting stop position W, if the auxiliary transmission switching operation member 17 leaves the planting stop position W and the planting stop position detection unit 430 detects that the planting stop is not When the position is W, it is judged which stage the planting stop processing at this time point is.

At this time, when the process of planting process 1 is stopped, planting process 0 is set, and the trunnion 295 is output to the stop side by the trunnion electric motor 103 (equivalent to "continuously variable transmission stop output" in FIG. 25 ). On the other hand, when the stop planting process is not the stop planting process 0, it is judged whether it is the stop planting process 2 or 3; 24 "planting action on-off part cuts off the output"), setting stops planting process 0, and the trunnion 295 is output to the stop side by the trunnion electric motor 103.

Fig. 28 shows the structure of the hydraulic circuit of the continuously variable transmission device 23 of the rice transplanter 1 of this embodiment, Fig. 29 shows a side sectional view of the continuously variable transmission device 23, and Fig. 30 shows a top sectional view of the continuously variable transmission device 23.

As shown in FIG. 28 , a variable-capacity hydraulic pump A and a fixed-capacity hydraulic motor B form a continuously variable transmission device 23 connected via hydraulic closed circuits 266 and 267 . The input shaft 274 of the fixed capacity hydraulic motor B is adjusted according to the amount of oil discharged by the hydraulic pump A and the direction of the discharge of the hydraulic oil by using the reciprocating motion of a plurality of pistons 248 arranged side by side. The rotation speed and direction of the output shaft 275 are changed according to the discharge direction.

In addition, as shown in Fig. 29 and Fig. 30, a part of the hydraulic closed circuit 266, 267 is provided inside, and a valve port block (port block) 271 is arranged in a direction perpendicular to the input shaft 274 and the output shaft 275, and the valve is built in. The port block 271 is connected to the block interior of the hydraulic pump side cylinder 247a of the hydraulic pump A and the block interior of the hydraulic motor side cylinder 247b containing the hydraulic motor B to form the hydraulic closed circuits 266 and 267 described above.

The hydraulic closed circuit 266 and the hydraulic closed circuit 267 shown in FIG. 28 form a closed circuit. If the swash plate 69 on the A side of the variable capacity hydraulic pump shown in FIG. The hydraulic pressure flowing to the fixed displacement hydraulic motor B side becomes high pressure, and the hydraulic closed circuit 267 on the opposite side of the hydraulic closed circuit 266 becomes low pressure at this time, and the oil discharged from the fixed displacement hydraulic motor B side is sucked into the variable displacement hydraulic pump A .

The casing 272 of the continuously variable transmission and the casing of the booster pump 273 (refer to FIG. 28 ) shown in FIG. 29 and FIG. It is integrally formed and supports an input shaft 274 and an output shaft 275 whose axial directions are parallel to each other. A hydraulic pump A and a trochoidal rotor (not shown) of the booster pump 273 are provided around the input shaft 274 , and a hydraulic motor B is provided around the output shaft 275 .

In the above-mentioned hydraulic pump A and hydraulic motor B, a plurality of cylinders 247 are arranged parallel to the axial direction around the input shaft 274 and the output shaft 275 to form a cylinder block, and a piston sliding in the axial direction is provided in each cylinder 247. 248. The respective pistons 248 are rotatably supported by respective ball joints of the joint plate 277 , and are provided so as to freely rotate about shafts 274 and 275 with respect to the thrust plate 278 of the swash plate 69 .

The above-mentioned booster pump 273 is used to replenish oil from the container port T to the hydraulic closed circuits 266, 267, and communicates with the oil filter 280, the main safety valve 281, the magnetic field valves (one-way valves) 282a, 282b and the neutral valve 283, etc. Each hydraulic closed circuit 266, 267 is connected. A high-pressure safety valve 285 is provided throughout the above-mentioned two hydraulic closed circuits 266 and 267 .

The trunnion 295 is provided in a direction perpendicular to the input shaft 274, and the pin slider 298 of the crank arm 296 integrated with the trunnion 295 at the front end of the trunnion 295 engages with the roller groove 69a formed in the swash plate 69. Together, the trunnion arm of the trunnion 295 is rotated by actuating the trunnion electric motor 103, so that the pin slider 298 is rocked to adjust the inclination angle of the swash plate 69.

When the angle of the swash plate 69 is changed by rotating the trunnion 295, the pressing position of the piston 248 is changed, and the high pressure and low pressure of the hydraulic pump A are switched.

FIG. 31 shows an enlarged view of a portion of the piston 248 . Generally, as shown in Fig. 31(a), a dome-shaped piston is used, but if the R dimension at the front end of the piston is small, the surface pressure becomes high and the strength becomes weak. Conversely, if the R dimension is increased, there is a swash plate The problem that the reaction force of 69 becomes large and the operating load of trunnion 295 becomes heavy.

Therefore, as shown in Figure 31(b) and (c), the piston 248a on the A side of the hydraulic pump uses a piston with a small R size to reduce the operating load of the trunnion electric motor 103 on the trunnion 295, and always engages with the trunnion at a certain angle. The piston 248b on the B side of the hydraulic motor that the disk 277 contacts should only use a piston with a large R dimension to ensure strength.

Fig. 31(b) shows the piston 248a on the hydraulic pump A side, and Fig. 31(c) shows the piston 248b on the hydraulic motor B side. For example, the R dimension of the piston 248a is set to 24 (mm), and the R dimension of the piston 248b is set to 28 (mm).

Usually, the piston 248a of the hydraulic pump A and the piston 248b of the hydraulic motor B use pistons of the same shape, and by changing the R dimension of the tip of the piston 248 on the hydraulic pump A side and the hydraulic motor B side as described above, the following Effect.

That is, on the side of the hydraulic pump A, the contact position of the joint plate 277 and the R portion at the tip of the piston 248a changes due to the movement of the swash plate 69. Therefore, a small R dimension is adopted that improves the strength and has a small reaction to the swash plate 69. As for the piston of the hydraulic motor B side, since the engagement plate 277 and the R portion of the front end of the piston 248b are always in contact at a certain angle, a piston with a large R dimension at the front end that requires a certain degree of strength can be provided. The shaft 295 is a continuously variable transmission 23 with a light operating load and high pressure resistance.

FIG. 32 shows an example different from the piston 248 shown in FIGS. 31( a ) to 31 ( c ).

In addition, as shown in FIG. 32( a ), a spiral groove 248 c may be provided on the outer peripheral surface (side surface) of the piston 248 . In the dome-shaped piston, if the sliding part U on the side causes the oil film to fall off, it will cause abnormal wear and burns between the dome-shaped piston and the cylinder block. However, the helical groove provided on the outer peripheral surface On the other hand, an oil film is easily formed, so that the above-mentioned disadvantages can be prevented.

That is, by introducing the working oil into the groove 248c in accordance with the back and forth movement of the piston 248, the formation of the oil film is promoted, and there is an effect of preventing troubles such as abnormal wear.

In addition, the shape of the groove is not limited to the spiral shape, and may be a grid-shaped groove 248d as shown in FIG. 32( b ), or a wedge-shaped groove 248e as shown in FIG. 32( c ). In addition, the piston 248 shown in FIG. 32 is common to both the piston 248a of the hydraulic pump A and the piston 248b of the hydraulic motor B.

production availability

The present invention can be used for a passenger-type seedling transplanting machine equipped with a fertilization device and a seedling planting unit.

Claims (7)

1. A kind of seedling transplanting machine, the left and right rear wheels as driving wheels are set on the traveling body, the seedling planting part is set in the rear part of the traveling car body in a manner that can be lifted and lowered freely, and the seedling planting part is provided with a surface contacting with the farmland surface. The floating body is provided with a fertilizing device for supplying fertilizer to the farmland, and an angle detection member for detecting the rotation angle of the above-mentioned floating body is provided. The rotary linkage mechanism of the action of the device, The above-mentioned seedling transplanting machine is characterized in that, A planting action on-off part for on-off of the planting action of the above-mentioned seedling planting part is provided, and a rotation sensor for detecting the rotation speed of the above-mentioned rear wheel is provided, a fertilization transmission on-off part for on-off of the action of the above-mentioned fertilization device is provided, and a control device is provided. , when the seedling planting part rises through the above-mentioned rotary interlocking mechanism, and when the rotation sensor starts to detect the rotational speed, the planting action on-off part and the fertilization transmission on-off part enter the off state, and when the seedling planting part descends, the floating body is grounded And when the detection angle of the angle detection part is within the specified angle range, the control device will make the above-mentioned fertilization transmission on-off part in the on state, and when the rotation speed detected by the above-mentioned rotation sensor reaches the specified speed, the control device will make the planting action on-off part is on. 2. The seedling transplanting machine according to claim 1, characterized in that, The above-mentioned control device makes the fertilization transmission on-off component in the on state while keeping the planting action on-off component in the off state. 3. The seedling transplanting machine according to claim 1 or 2, characterized in that, The left and right rear wheel gearboxes for respectively supplying driving force to the above-mentioned left and right rear wheels are provided, and the fertilization transmission part and the opposing fertilization transmission part for supplying driving force to the above-mentioned fertilization device through the rear wheel gearbox are arranged on the left and right rear wheel gearboxes. The above-mentioned fertilization transmission on-off component for switching on and off the transmission of the fertilization transmission component constitutes a fertilization transmission mechanism. 4. The seedling transplanting machine according to claim 3, characterized in that, A planting on-off switching part for turning on and off the above-mentioned planting action on-off part, a fertilizing transmission on-off switching part for switching on and off the above-mentioned fertilization transmission on-off part, and a fertilization transmission for operating the fertilization transmission on-off switching part are provided. switch parts, The above-mentioned control device is configured such that when the detection angle of the above-mentioned angle detection part is within a predetermined angle range or any one of the conditions of turning on the above-mentioned fertilization transmission switching part is satisfied during the operation of the above-mentioned rotary interlocking mechanism, the above-mentioned fertilization transmission will be activated. The on-off switching part acts to make the fertilization transmission on-off part in the on state, One end of the fertilization transmission member protrudes to the outside of the rear wheel gearbox. In the fertilization transmission member, a manual operation member for manually manipulating fertilizer supply to the fertilization device is provided at the portion protruding from the rear wheel gearbox. 5. The seedling transplanting machine according to claim 3, characterized in that, A turning operation member for steering the above-mentioned traveling vehicle body is provided, left and right front wheels are provided on the above-mentioned traveling vehicle body, and the direction of the left and right front wheels is changed and turned inside in conjunction with the operation of the turning operation member. The steering mechanism in which the side clutch of the rear wheel is in a disengaged state is provided with a turning direction detecting member for detecting the turning operation direction of the turning operating member, The above-mentioned control device is configured such that when the rotation direction detected by the rotation direction detection part is such that the left and right rear wheel gearboxes on which the above-mentioned fertilization transmission part is installed are turned inside, the above-mentioned fertilization transmission on-off switching part turns on and off the fertilization transmission. The component is switched on earlier than when the rear wheel gearbox on the other side of the left and right is the inside of the swing. 6. The seedling transplanting machine according to claim 1 or 2, characterized in that, An engine and left and right front wheels are provided on the above-mentioned traveling vehicle body, an auxiliary transmission device for transmission from the engine to the above-mentioned left and right front wheels and left and right rear wheels is provided, and an auxiliary transmission switching operation member for switching the auxiliary transmission device is provided. , setting an auxiliary transmission operation position detecting member for detecting the operation position of the auxiliary transmission switching operation member, The neutral operating position of the auxiliary transmission switching operation member is formed to cut off the transmission of the front wheel and the rear wheel to switch to the driving neutral state and the above-mentioned planting operation on-off member is in the off state, and, The planting stop position is formed on the side of the neutral operation position, and the planting stop position detection member for detecting that the auxiliary transmission switching operation member is located at the planting stop position is provided, and the planting stop position is operated by the auxiliary transmission switching operation member. , switch to the stop planting state in which the above-mentioned planting action on-off member is in the on-state and the planting device is operated under the state of cutting off the transmission to the above-mentioned front wheel and rear wheel, The above control device is configured to cause the planting operation of the seedling planting part to be performed when it is detected by the planting stop position detecting part that the auxiliary transmission switching operation member is operated to the planting stop position and the rotation angle of the floating body is within a predetermined angle range. The on-off planting action on-off part is in the on-state, and the rotation angle of the floating body detected by the above-mentioned angle detection part is detected by the above-mentioned stop planting position detection part. When it is outside the specified angle range, the above-mentioned planting action on-off component is in a disconnected state. 7. The seedling transplanting machine according to claim 1 or 2, characterized in that, An engine and left and right front wheels are provided on the above-mentioned traveling vehicle body, an auxiliary transmission device for transmission from the engine to the above-mentioned left and right front wheels and left and right rear wheels is provided, and an auxiliary transmission switching operation member for switching the auxiliary transmission device is provided. , an auxiliary transmission operating position detection member is provided to detect the operating position of the auxiliary transmission switching operation member, so that the auxiliary transmission device cuts off the transmission of the front wheel and the rear wheel, switches to the driving neutral state, and makes the above-mentioned planting action on and off. The neutral operating position of the above-mentioned auxiliary transmission switching operating member with the member in the disconnected state, and, The planting stop position is formed on the side of the neutral operation position, and the planting stop position detection member for detecting that the auxiliary transmission switching operation member is located at the planting stop position is provided, and the planting stop position is operated by the auxiliary transmission switching operation member. , switching to the stop planting state in which the above-mentioned planting operation on-off member is in the on-state and the planting device is operated under the state of cutting off the transmission to the above-mentioned front wheel and the rear wheel, A continuously variable transmission device for transmission from the above-mentioned engine to the auxiliary transmission device is provided, a main transmission switching operation member for performing a shift operation on the continuously variable transmission device is provided, and a main transmission operation amount detection unit for detecting the operation of the main transmission switching operation member is provided. A trunnion driver for rotating a trunnion of the continuously variable transmission device based on detection by the main transmission operation amount detection member is provided, a trunnion detection member for detecting a rotational position of the trunnion is provided, The control device is configured to detect, by the main transmission operation amount detection unit, that the main transmission switching operation member has been operated to a neutral position where the traveling of the traveling vehicle body is stopped, and that the rotation angle of the floating body is detected by the angle detection unit. When the angle is within the specified angle range, if the above-mentioned sub-speed switching operation member is operated to the planting stop position, the above-mentioned planting action on-off member is in the ON state.