JP6304414B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling transplanting machine that can plant seedlings in a field.

  Prior Patent Document 1 (Japanese Patent Application Laid-Open No. 2011-31) discloses a seedling transplanting machine in which a transmission mechanism to a leveling rotor is provided in a rear wheel transmission case on one side of the left and right sides.

  As a result, the driving force transmitted from the drive shaft to the rear wheel transmission case can be used to drive the leveling rotor, so there is no need to form a transmission path for the leveling rotor, and the configuration is simplified by reducing the number of parts. And weight reduction.

  In addition, since the driving of the leveling rotor is changed according to the traveling speed, the rotation of the leveling rotor is insufficient and the unevenness of the field is not leveled, or the field scene is disturbed by excessive rotation and the planting depth is reduced. Disturbance is prevented.

  Prior Patent Document 2 (Japanese Patent Application Laid-Open No. 2014-212718) discloses a seedling transplanting machine in which a rear wheel transmission case on one of the left and right sides is provided with a transmission mechanism to a fertilizer application device.

  As a result, the driving force transmitted from the drive shaft to the rear wheel transmission case can be used to drive the fertilizer application, so there is no need to form a transmission path for the fertilizer application, and the configuration is simplified by reducing the number of parts. And weight reduction. Further, since the drive of the fertilizer application is changed in accordance with the traveling speed, it is possible to prevent the seedling from being poorly grown due to insufficient supply of fertilizer or excessive supply of fertilizer.

  However, the leveling shaft that transmits the driving force to the leveling rotor is arranged in a downward inclined posture from the rear wheel transmission case toward the rear of the fuselage, but the fertilizer transmission mechanism that transmits to the fertilizer is the rear wheel transmission case. Therefore, it is necessary to make the structures of the left and right rear wheel transmission cases different from each other. Thereby, since the rear-wheel transmission case transmitted to the left and right rear wheels has a structure that is not common to the left and right, there is a problem that the number of parts increases, resulting in a complicated configuration and an increase in weight.

  And the seedling planting part carried by the seedling transplanting machine described in Patent Documents 1 and 2 is configured so that the planting interval in the left-right direction between the seedlings, so-called streak, is constant. Depending on the location, the setting of the interval may be different, and the design according to the different interval is performed.

  At this time, it is necessary to set the distance between the left and right front wheels and the rear wheel, that is, the so-called tread that passes between the planted seedlings, but the treads of the front and rear wheels are transmitted according to the length of the seedling planting part to be mounted. Since it is designed from the case, there is a problem that the front wheel and the rear wheel are not compatible and the productivity of the seedling transplanter is lowered.

JP 2011-31 A JP 2014-212718 A

  In the configuration of the seedling transplanter described in Patent Documents 1 and 2, the front and rear treads are designed from the transmission case in accordance with the width of the seedling planting part to be mounted, so that the front wheels and rear wheels are compatible. It is necessary to solve the problem that the productivity of the seedling transplanter is low.

  Accordingly, an object of the present invention is to provide a seedling transplanter with high productivity in which front wheels and rear wheels are compatible.

  The above-described problems of the present invention are solved by the following solution means.

According to the first aspect of the present invention, the left and right traveling transmission cases (13, 18) that transmit driving force to the left and right traveling wheels (10, 11) are mounted on the traveling vehicle body (2), respectively. A seedling transplanting machine provided with an auxiliary work device (68) including a fertilizer (5) for supplying fertilizer to the field and a leveling device (27) for leveling the field while being provided with a seedling planting part (4) in the right and left traveling transmission case (13, 18), the auxiliary working device (68) to the mounting can be changed each detachable in and attached orientation the auxiliary transmission case (67) for transmitting the driving force, the The fertilizer application (5) is driven by one of the left and right auxiliary transmission cases (67), and the leveling device (27) is driven by the other auxiliary transmission case (67). , attached figure of the left and right auxiliary transmission case (67) , The fertilizing device (5) transmission before Symbol leveling device to (27) and mutually different posture transmission to the left and right traveling transmission case the left and right traveling wheels (10, 11) (13, 18) The seedling transplanting machine is characterized in that the left-right distance between the left and right traveling wheels (10, 11) is changed when the direction to be attached to is changed.

According to a second aspect of the present invention, the left and right traveling wheels (10, 11) are constituted by left and right front wheels (10) and left and right rear wheels (11), and the front wheels are mounted on the axles of the left and right front wheels (10). Support members (92) are provided, and the left and right wheels (10) are each provided with mounting flanges (88) that can be attached to the left and right front wheel support members (92) on either the left or right side,
The left and right mounting surfaces of the left and right mounting flanges (88) are biased to the same side from the left and right central portions of the left and right wheels (10), and the surface to which the left and right wheels (10) are mounted is changed. Then, it is set as the structure by which the space | interval of the right-and-left wheel (10) was changed, It is a seedling transplanter of Claim 1 characterized by the above-mentioned.

  According to a third aspect of the present invention, the left and right traveling wheels (10, 11) are composed of left and right front wheels (10) and left and right rear wheels (11), and the left and right rear wheels (11) are mounted. Each of the left and right rear wheel axles (75) is provided via a support member (80), and each of the left and right mounting bosses (80) is provided with a protrusion (80a) protruding left and right. 80a) protrudes toward the inner side of the vehicle body of the traveling vehicle body (2) and the left and right rear wheels (11) are mounted, and protrudes toward the outer side of the vehicle body of the traveling vehicle body (2). The seedling transplanting machine according to claim 1, wherein when the rear wheel (11) is mounted, the left and right rear wheels (11) are configured to change a left-right distance.

According to a fourth aspect of the present invention, the left and right traveling transmission cases (13, 18) that transmit driving force to the left and right traveling wheels (10, 11) are mounted on the traveling vehicle body (2), respectively. A seedling transplanting machine provided with an auxiliary work device (68) including a fertilizer (5) for supplying fertilizer to the field and a leveling device (27) for leveling the field while being provided with a seedling planting part (4) in the right and left traveling transmission case (13, 18), the auxiliary working device (68) to the mounting can be changed each detachable in and attached orientation the auxiliary transmission case (67) for transmitting the driving force, the The fertilizer application (5) is driven by one of the left and right auxiliary transmission cases (67), and the leveling device (27) is driven by the other auxiliary transmission case (67). , attached figure of the left and right auxiliary transmission case (67) , Said a respective different orientation in transmission to the fertilizer unit transmission before Symbol leveling device to (5) (27), said right and left traveling transmission case (13, 18) is mounted on said vehicle body (2) An upper case (83), a lower case (84) slidably attached to the upper case (83), and a spring (85) in a space between the upper case (83) and the lower case (84) Each of the suspension mechanisms (87) includes a pressure release portion connected to a space in which the spring (85) is disposed in the upper case (83) or the lower case (84), or the upper case (83). The seedling transplanting machine is characterized in that a pressure-extracting portion is formed by extracting a part of a ball of a bearing (90) between the traveling transmission members (69).

  In addition to this, in the first related invention, the left and right traveling wheels (10, 11) and the left and right traveling transmission cases (13, 18) are provided at the front and rear portions of the traveling vehicle body (2), respectively. Auxiliary transmission case for transmitting the driving force to the auxiliary work device (68) to the left and right rear wheel transmission cases (18) provided at the rear of the traveling vehicle body (2). (67) are detachably mounted and turnable, and the left and right auxiliary transmission cases (67) have auxiliary operation output shafts (79) in the front-rear direction for rotating the transmission mechanism of the auxiliary operation device (68). A left and right rear wheel transmission case (18) and a left and right auxiliary transmission case (67) are transmitted to the transmission case (12). Providing a transmission member (69), The right rear wheel transmission case (18) has left and right output members (72) respectively transmitted from the left and right traveling transmission members (69), and left and right input members respectively transmitted from the left and right output members (72). The left and right traveling wheel axles (75) that rotate the left and right traveling wheels (11) by the member (73) and the left and right input members (73), respectively, and the left and right auxiliary transmission cases (67) Left and right output rotators (76) respectively transmitted from the left and right traveling transmission members (69), left and right input rotators (77) respectively transmitted from the left and right output rotators (76), and the left and right A seedling transplanting machine comprising the left and right auxiliary work output shafts (79) respectively rotated by the input rotating body (77).

  According to the first aspect of the present invention, the auxiliary transmission case (67) is detachably provided on the left and right traveling transmission cases (13, 18), so that the auxiliary work device (68) is added or removed. At this time, since the auxiliary transmission case (67) can be attached and detached, the adaptability of the working conditions is improved as compared with the prior art.

  In addition, since the left and right traveling transmission cases (13, 18) do not affect the transmission to the auxiliary work device (68), the left and right traveling transmission cases (13, 18) can have the same configuration. Productivity of the transmission case (13, 18) is improved.

  Moreover, when the right and left distance between the left and right traveling wheels (10, 11) is changed, the left and right traveling wheels (10, 11) are mounted when the seedling planting part (4) having different planting strips is mounted. The seedlings planted by the seedling planting part (4) can be easily moved to a position where the seedlings are not stepped on, and work efficiency is improved.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the mounting surface of the mounting flange (88) of the front wheel support member (92) has a left or right front wheel (10 ) And the left and right front wheels (10) are biased to the same side from each other so that if the direction of attaching the left and right front wheels (10) is changed, the distance between the left and right front wheels (10) is changed. As a result, the front wheel (10) can be separated from the seedling planting position when the seedling planting part (4) having different planting strips is mounted, and the time and labor required for the change work are reduced. The

  Further, since there is no need to change the transmission path to the front wheel transmission case (13), the number of parts does not increase, and the configuration can be simplified and reduced in weight.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1, changing the direction in which the left and right rear wheels (11) are attached can change the distance between the left and right rear wheels (11). As a result, the rear wheel (11) can be separated from the planting position of the seedling when the seedling planting part (4) having different planting strips is mounted, and the time and labor required for the change work are reduced. .

  Further, since there is no need to change the transmission path to the left and right rear wheel transmission cases (18), the number of parts does not increase, and the configuration can be simplified and reduced in weight.

  According to the fourth aspect of the present invention, the pressure in the front wheel transmission case (13) when the suspension mechanism (87) is actuated by forming the pressure release portion in the upper case (83) or the lower case (84). Since the change can be reduced, breakage in the front wheel transmission case (13) is prevented.

  Moreover, since the buffer effect by the load of a spring (85) improves by suppressing the pressure change in a front-wheel transmission case (13), driving | running | working property and planting precision improve.

  In addition to this, according to the related invention 1, the left and right traveling transmission members (69) are mounted with the left and right traveling transmission cases (13, 18) and the left and right auxiliary transmission cases (67), respectively. Since the driving force can be supplied to the traveling transmission case (13, 18) and the auxiliary transmission case (67) by the transmission member (69), the transmission path is simplified and the number of parts can be reduced.

  Further, even if the auxiliary transmission case (67) is removed, the transmission path to the traveling transmission case (13, 18) does not change, so that it can be easily changed to a configuration adapted to the attachment / detachment of the auxiliary work device (68).

  Then, by providing the output member (72) and the output rotating body (76) on the same traveling power transmission member (69), the amount of operation of the auxiliary work device (68) according to the change in the traveling speed of the traveling vehicle body (2). Therefore, it is possible to prevent the operation not suitable for the traveling speed from being performed and to improve the growth of the seedling.

It is a left view of the seedling transplanter of one Example of this invention. It is a top view of the seedling transplanting machine of FIG. It is a principal part top view of the driving | running | working transmission case and auxiliary | assistant transmission case of the left side of the body of the seedling transplanter of one Example of this invention. It is a principal part top view of the driving | running | working transmission case and auxiliary | assistant transmission case of the body right side of the seedling transplanter of one Example of this invention. FIG. 5 is a top view of the traveling transmission case and the auxiliary transmission case of FIGS. 3 and 4. FIGS. 6A and 6B are front wheel mounting diagrams (FIG. 6A shows a tread of 1220 mm and FIG. 6B shows a tread of 1000 mm) when changing the tread of the front wheel of the seedling transplanter of one embodiment of the present invention. It is each detail drawing of FIG. 6 (A) and FIG. 6 (B). It is a principal part front view of the driving | running | working transmission case and power input shaft of the right side of the body of the seedling transplanter of one Example of this invention. It is a principal part front view of the driving | running | working transmission case and power input shaft of the right side of the body of the seedling transplanter of one Example of this invention. It is a side view of the front wheel support part on the right side of the body of the seedling transplanter of one embodiment of the present invention. It is a body front view of a seedling transplanter of one example of the present invention. It is a top view of the seedling transplanter of a prior art.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, the configuration and operation of the work vehicle according to the present embodiment will be specifically described with reference to FIGS. 1 and 2.

  In the present specification, the forward direction of the seedling transplanter is referred to as the front side, the backward direction is referred to as the rear side, and the left-right direction toward the forward direction is referred to as the left side and the right side, respectively.

  FIG.1 and FIG.2 is the side view and top view of the riding type rice transplanter which are one Example of this invention. In this riding type rice transplanter 1, a seedling planting part 4 is mounted on the rear side of the traveling vehicle body 2 through a lifting link device 3 so as to be movable up and down, and a main body portion of the fertilizer device 5 is provided on the rear upper side of the traveling vehicle body 2. ing.

  The traveling vehicle body 2 is a vehicle having a pair of left and right front wheels 10 and 10 and a pair of left and right rear wheels 11 and 11, and a transmission case 12 is disposed in the front part of the fuselage. Front wheel transmission cases (front wheel axle cases) 13, 13 are provided, and the left and right front wheels 10, on the left and right front wheel axles projecting outward from respective front wheel support portions capable of changing the steering direction of the left and right front wheel axle cases 13, 13. 10 are attached to each. Further, the front end of the main frame 15 is fixed to the rear portion of the transmission case 12, and a rear wheel transmission case (with a rear wheel rolling shaft provided horizontally in the front and rear of the rear end of the main frame 15 as a fulcrum) (Rear wheel gear cases) 18 and 18 are supported in a freely rolling manner, and the rear wheels 11 and 11 are attached to a rear wheel axle 11a projecting outward from the rear wheel gear cases 18 and 18.

  In this embodiment, a four-wheel drive vehicle is illustrated, but a configuration in which engine driving force is transmitted to the rear wheels 11 or a configuration in which engine driving force is transmitted to the front wheels 10 may be employed.

  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 the belt transmission device 21 and the HST 23. The rotational power transmitted to the mission case 12 is shifted by a transmission in the case 12 and then separated into traveling power and external power to be extracted. A part of the traveling power is transmitted to the front wheel axle cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the traveling transmission cases (rear wheel transmission cases) 18 and 18 to transmit the rear wheels 11 and 13. 11 is driven. Further, the external take-out power is transmitted to a planting clutch case (not shown) provided in the mission case 12, and then transmitted to the seedling planting unit 4 by a planting transmission shaft 26, and also a fertilizer transmission mechanism (not shown). (Omitted) is transmitted to the fertilizer application 5.

  The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the front wheels 10 and 10 is provided above the front cover 32. The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. The floor step 35 is partly grid-shaped (see FIG. 2), and mud on the shoe of the worker walking through the step 35 falls on the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

  Further, on both the left and right sides of the front part of the traveling vehicle body 2, the spare seedling platforms 38, 38 on which the replenishment seedlings are placed can be pivoted to a position projecting laterally from the machine body and a position housed inside. Is provided.

  The elevating link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing. And the connecting 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 so as to be able to roll around the connecting shaft 44. An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip of a swing arm (not shown) integrally formed with the upper link 40, and the cylinder 46 is expanded and contracted by hydraulic pressure. The upper link 40 pivots up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

  The seedling planting section 4 has a six-row planting structure, a transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to supply seedlings to the seedling outlet 51a of each row one by one. When all the seedlings are supplied to the seedling outlet 51a, the seedling feed belt 51b is used to transfer the seedlings downward by a seedling feeding belt 51b, and the seedling planting is carried out in the field. Attaching device 52,... Includes a pair of left and right drawing markers 97 for drawing the aircraft path in the next stroke to the topsoil surface. In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and side floats 56, 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55, 56, 56 in contact with the mud surface of the field, the floats 55, 56, 56 slide while leveling the mud surface, and the seedling planting device 52, Seedlings are planted by ... Each of the floats 55, 56, and 56 is rotatably attached so that the front end side thereof moves up and down according to the unevenness of the soil surface of the field, and the vertical angle movement of the front part of the center float 55 is not shown during planting work. By switching a hydraulic valve (not shown) that controls the lifting hydraulic cylinder 46 according to the detection result, the seedling planting part 4 is moved up and down, so that the seedling planting depth is always maintained constant.

  The fertilizer applicator 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a certain amount by the feeding portions 61,... And applies the fertilizer to the left and right sides of the floats 55, 56, 56 with the fertilizer hoses 62,. Guided to a guide (not shown),... Is dropped into a fertilization structure formed in the vicinity of the side portion of the seedling planting line by a grooved body 69 provided on the front side of the fertilization guide. Air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hose 62 through the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hose 62 is forced by the wind pressure. It is designed to be transported.

  A rotor 27 (27a, 27b) which is an example of a leveling device is attached to the seedling planting unit 4. In addition, the seedling mount 51 is configured to slide in the left-right direction using a support roller 65a of a rectangular support frame 65 having a full width in the left-right direction and the vertical direction that supports the entire seedling planting unit 4 as a rail.

  Next, based on FIG. 3 and 4, the structure and operation | movement of the seedling transplanter (rice transplanter) of this invention are demonstrated concretely. FIG. 3 is a plan view of main parts of the traveling transmission case and auxiliary transmission case on the left side of the machine body of the seedling transplanter, and FIG. 4 is a plan view of essential parts of the traveling transmission case and auxiliary transmission case on the right side of the machine body.

  FIG. 3 shows a state where the drive system of the leveling rotor 27 is attached to the auxiliary transmission case 67, and FIG. 4 shows a state where the fertilizer transmission system is attached to the auxiliary transmission case 67.

  FIG. 5 shows a plan view of the auxiliary transmission case 67 for driving the leveling rotors 27a and 27b (see FIG. 1) attached rotatably about the rotation shaft 18a of the rear wheel transmission case 18. As shown in FIG.

  The left and right rear wheel transmission cases 18 that transmit the driving force to the left and right rear wheels 11 are connected to the auxiliary work device 68 (referred to generically as a fertilizer 5, the ground leveling rotors 27a and 27b, and the devices composed of these drive systems). The auxiliary transmission cases 67 for transmitting the driving force are detachably and rotatably mounted. This is because the auxiliary transmission case 67 can be attached or detached when the auxiliary work device 68 is added or removed.

  Further, since the auxiliary transmission case 67 is mounted on the rear wheel transmission case 18 so as to be rotatable about the rotation center 18 a, the auxiliary transmission case 67 is arranged in accordance with the mounting direction of the transmission mechanism of the auxiliary work device 68. Since the mounting posture can be changed, the auxiliary work device 68 can be easily attached and detached by moving to a place where the auxiliary work device 68 can be easily attached and detached, and the auxiliary transmission case 67 can be shared between the left and right.

  Furthermore, since the rear wheel transmission case 18 does not affect the transmission to the auxiliary work device 68, the configuration of the left and right rear wheel transmission cases 18 can be made the same, so that the productivity of the rear wheel transmission case 18 is the prior art. More improved.

  Although the transmission case 2 is mounted on the traveling vehicle body 2, a traveling transmission member (drive shaft) 69 that transmits driving force from the transmission case 12 to the left and right traveling transmission cases (rear wheel transmission cases) 18 is provided. 69, an auxiliary transmission case 67 and a traveling transmission case (rear wheel transmission case) 18 are mounted so that driving force is supplied from the same traveling transmission member 69 to the traveling transmission case 18 and the auxiliary transmission case 67. The transmission case 67 and the traveling vehicle body (airframe frame) 2 are coupled via a connecting member (joint plate) 71 (FIGS. 3 and 4).

  By mounting the traveling transmission case 18 and the auxiliary transmission case 67 on the left and right traveling transmission members 69, a driving force is supplied to the traveling transmission case (rear wheel transmission case) 18 and the auxiliary transmission case 67 with one traveling transmission member 69. Therefore, the transmission path is simplified, and the number of parts can be reduced.

  Further, even if the auxiliary transmission case 67 is removed, the transmission path to the rear wheel transmission case 18 does not change, so that it can be easily changed to a configuration that matches the attachment / detachment of the auxiliary work device 68.

  In the rear wheel transmission case 18, an input member (input bevel gear) 73 (see FIG. 4) that meshes with an output member (output bevel gear) 72 attached to the traveling transmission member 69, and the traveling wheel 11 is rotated by the rotation of the input bevel gear 73. An axle 75 is arranged, and in the auxiliary transmission case 67, an output rotation body (output sprocket) 76 mounted on a traveling transmission member (drive shaft) 69 and an input rotation for transmitting a driving force to the transmission mechanism of the auxiliary work device 68. A body (input sprocket) 77 and an auxiliary work output shaft 79 (FIG. 4) for rotating the transmission mechanism of the auxiliary work device 68 were provided.

  Since the output member 72 and the output rotator 76 are provided on the same drive shaft 69, the operation amount of the auxiliary work device 68 can be changed in accordance with the change in the traveling speed of the traveling vehicle body 2, and thus is not suitable for the traveling speed. The work is prevented from being performed, and the growth of the seedling is improved.

  Next, FIG. 6 (A) and FIG. 6 (B) show a configuration for changing the distance between the left and right rear wheels 11 that can be applied to change the distance between the left and right seedlings.

  An attachment support member (attachment boss) 80 for attaching the traveling wheel (rear wheel) 11 to both ends of the axle 75 is provided, and a protrusion 80 a that protrudes laterally from the rear wheel 11 is provided at one end of the attachment support member 80. Provide. At this time, when the projection 80a of the mounting support member 80 shown in FIG. 6 (A) is mounted on the axle 75 from the rear wheel 11 toward the inside of the traveling vehicle body 2, the rear wheel 11 is removed and the wheel 11 is reversed. 6 (B), the protruding portion 80a of the mounting support member 80 is mounted on the axle 75 from the rear wheel 11 toward the outside of the traveling vehicle body 2, so that the left-right distance between the pair of rear wheels 11 is increased. Can be changed.

  That is, as shown in FIG. 7A, the rear wheel 11 is removed from the mounting support member 80 when the protruding portion 80a of the mounting support member 80 is mounted on the axle 75 from the rear wheel 11 toward the inside of the traveling vehicle body 2, When the projection 80a of the mounting support member 80 is mounted on the axle 75 from the rear wheel 11 toward the outside of the traveling vehicle body 2 as shown in FIG. The planting interval D in FIG. 7A is, for example, 30 cm, and in FIG. 7B, for example, it is 25 cm.

  7 (A) and 7 (B), the auxiliary traveling wheel 81 and the axle 75 are simultaneously shown when the rear wheel 11 is mounted on the axle 75 corresponding to FIGS. 6 (A) and 6 (B). The case where it is attached to is shown.

  In addition, the driving assistance wheel 81 is provided to be mounted in order to increase the driving force of the seedling transplanter in a field where it is difficult to escape. Here, as shown in FIG. 7 (A), when the traveling auxiliary wheel 81 is mounted on the axle 75 inside the rear wheel 11 (on the center of the fuselage), it is arranged along the axis of the mounting support member 80. The auxiliary driving wheel 81 is provided using the mounting hole 80b closest to the rear wheel transmission case 18 among the three mounting holes 80b. As shown in FIG. 7B, when the auxiliary wheel 81 is mounted on the axle 75 outside the rear wheel 11 (outside the fuselage), the farthest from the rear wheel 11 in the three mounting holes 80b. A travel assist wheel 81 is provided using the mounting hole 80b.

  With the above-described configuration, the left-right distance between the rear wheels 11 can be changed by changing the mounting position for mounting the rear wheel 11 on the axle 75, and further, the spacing between the planting strips of the seedling planting unit 4 (left-right distance between the seedlings) When changing, it is possible to move the rear wheel 11 to a position where the seedling is not stepped on by simply reversing the rear wheel 11, and the time and labor required for the change work are reduced.

  In addition, since there is no change in the transmission path to the traveling transmission case (rear wheel transmission case) 18, the number of parts does not increase, and the configuration can be simplified and reduced in weight.

  A front wheel support member (front wheel transmission case) 13 having the right front wheel 10 shown in a partial front sectional view in FIG. A suspension mechanism 87 having a spring 85 is provided in a space between the upper case 83 and the lower case 84, and a flange of the upper case 83 or the lower case 84. A pressure relief portion 88 a connected to a space in which the spring 85 is disposed is formed inside the portion 88. The driving force is transmitted to the rear wheel 11 by the gear 89a at the tip of the input shaft 89 meshing with a gear 69a provided in the middle portion of the drive shaft 69 that is long in a direction substantially perpendicular to the input shaft 89. Is called.

  As described above, the pressure release portion 88a is formed in the upper case 83 or the lower case 84, so that the change in pressure in the front wheel support member (front wheel transmission case) 13 when the suspension mechanism 87 acts is reduced, thereby reducing the front wheel support member. (Front wheel transmission case) 13 is prevented from being damaged. In addition, since the change in pressure in the front wheel support member (front wheel transmission case) 13 is suppressed, the buffering effect by the load of the spring 85 is improved as compared with the prior art, so that the runnability and planting accuracy of the seedling transplanter are also improved. .

  Further, by removing a part of the ball of the bearing 90 provided between the upper case 83 and the drive shaft 69 in place of the pressure release portion 88a, the pressure change in the front wheel support member (front wheel transmission case) 13 is reduced. You can also.

  FIG. 9 is a partial front sectional view of the main part of the right front wheel support structure (the same structure on the left side) including the front wheel 10. The spring case of the front wheel support member (front wheel transmission case) 13 includes an upper case 83 and a lower case 84. However, the transmission of the driving force to the rear wheel 11 is such that the gear 89a at the tip of the input shaft 89 meshes with a gear 69a provided at an intermediate portion of the drive shaft 69 that is long in a direction substantially perpendicular to the input shaft 89. Is done.

  Similarly to the case shown in FIG. 8, the upper case 83 attached to the traveling vehicle body 2, the lower case 84 slidably and rotatably attached to the upper case 83, and the upper case 83 and the lower case 84. A suspension mechanism 87 having a spring 85 is provided in the space between them. A part of the bearing 90 inside the upper case 83 that supports the drive shaft 69 and the spring 85 is made free of bearing balls, so that this part becomes a cavity and the front wheel final when the suspension mechanism 87 is acted on. It becomes a pressure release part in the case 13, and the damage in the front wheel final case 13 is prevented by reducing the pressure change, the buffering effect due to the spring load is stabilized, and muddy water is released from the seal part when the spring 85 is extended. To prevent inhalation.

  As shown in the side view of the front wheel support portion in FIG. 10, the front wheel transmission case 13 for mounting the front wheel 10 to the lower case 84 has a front wheel support member 92 and a concave mounting flange at the center of the front wheel 10 (in cross section). When the front wheel support member 92 is covered with the concave portion 88a of the mounting flange 88 and the flat portion 88b formed on the bottom of the concave portion 88a of the mounting flange 88 is attached to the front wheel support member 92. Therefore, the left and right distance between the front wheels 10 is changed.

  10A, the tread 1124 mm when the flat portion of the mounting flange 88 is attached to the front wheel support member 92 as shown in FIG. 10A, and the front wheel support member 92 in the concave portion of the mounting flange 88 as shown in FIG. The tread 1039 mm when the cover is mounted is different.

  When changing the spacing between the front wheels 10 in the direction in which the front wheel 10 is mounted on the front wheel support member 92 in this way, when changing the planting strips of the seedling planting unit 4 (left-right spacing between the seedlings), Since the front wheel 10 can be moved away from the seedling planting position simply by reversing the front wheel 10, the time and labor required for the change work can be reduced.

  In addition, since there is no change in the power transmission path from the front wheel final case 13 to the front wheel support member 92, the number of parts does not increase, and the configuration can be simplified and reduced in weight.

  As shown in the front view of the seedling transplanter in FIG. 11, the preliminary seedling frame 38 is supported by the pillars 93 provided at both ends of the step 35. On the other hand, a support column 93 made of a quadrangular column is set up by welding connection in the vertical direction. For this reason, the cross-sectional end portion of the support column 93 made of a quadrangular column is emphasized in appearance, and the welded connection portion is visible, so the visibility is not good.

  Therefore, as shown in FIG. 11, the rising portion on the step 35 of the support column 93 is bent toward the center of the vehicle body, and the rising portion of the support 93 extending upward from the step 35 is bent from a combination of square pipes. It was made to make it composition.

  By adopting such a configuration, the design is excellent, and the clearance between the end portion of step 35 and the support column 93 is reduced, so that the present embodiment shown in FIG. In the case of the column 93, the foot is not inadvertently placed on the step 35 between the end of the step 35 and the column 93, and the foot is not inadvertently taken. Since the column 93 of this embodiment is separated from the position of the drawing marker 97 (FIG. 1), it does not become an obstacle to the drawing marker 97.

  In addition, a member for mounting the battery 95 can be attached to the support column 93 below the lower preliminary seedling table 38.

  Conventionally, the battery 95 is placed on the floor step 35, but the step 95 is easily wetted, and the battery 95 may cause an electrical failure. However, as shown in FIG. 11, by placing the battery 95 on the support column 93, maintenance at the time of replacement of the battery 95 is facilitated. If a cover 95a for preventing rain is attached to the upper side of the battery 95 placed on the support column 93, the battery 95 will not cause an electrical failure.

  At this time, it is desirable to place a member capable of achieving a weight balance on the step 35 where the column 93 opposite to the region where the battery 95 is placed is located.

2 Traveling body 3 Lifting link device 4 Seedling planting part 5 Fertilizer 10 Front wheel (traveling wheel)
11 Rear wheel
13 Front wheel transmission case (running transmission case)
15 Main frame 18 Rear wheel transmission case (travel transmission case)
67 Auxiliary transmission case 68 Auxiliary work device 69 Traveling transmission member (drive shaft)
72 Output member 73 Input bevel gear 75 Axle (rear wheel axle)
76 Output rotating body (output sprocket)
77 Input rotating body (input sprocket)
79 Auxiliary work output shaft 80 Mounting support member 80a Protruding portion 81 Traveling auxiliary wheel 83 Upper case 84 Lower case 85 Spring 87 Suspension mechanism 88 Mounting flange 90 Bearing 92 Front wheel support member

Claims (4)

The left and right traveling transmission cases (13, 18) that transmit driving force to the left and right traveling wheels (10, 11) are respectively mounted on the traveling vehicle body (2), and the seedling planting portion (4) is mounted on the traveling vehicle body (2). And a seedling transplanting machine in which an auxiliary work device (68) including a fertilizer application device (5) for supplying fertilizer to the field and a leveling device (27) for leveling the field is detachably provided,
Attached to the left and right traveling transmission cases (13, 18) are auxiliary transmission cases (67) for transmitting driving force to the auxiliary working device (68), respectively, detachable and changeable mounting postures,
A configuration in which the fertilizer application (5) is driven by one of the left and right auxiliary transmission cases (67) and the leveling device (27) is driven by the other auxiliary transmission case (67). age,
The mounting orientation of the left and right auxiliary transmission case (67), and each different postures in transmission of the the fertilizing device (5) transmission before Symbol leveling device to (27),
When the direction in which the left and right traveling wheels (10, 11) are attached to the left and right traveling transmission cases (13, 18) is changed, the left-right distance between the left and right traveling wheels (10, 11) is changed. A seedling transplanter characterized by that. The left and right traveling wheels (10, 11) are composed of left and right front wheels (10) and left and right rear wheels (11),
Front wheel support members (92) are provided on the axles of the left and right front wheels (10), respectively, and the left and right wheels (10) can be attached to the left and right front wheel support members (92) on either the left or right side. (88) respectively,
The left and right mounting surfaces of the left and right mounting flanges (88) are biased to the same side from the left and right central portions of the left and right wheels (10), respectively.
The seedling transplanting machine according to claim 1, wherein when the surface on which the left and right wheels (10) are attached is changed, the left and right distance between the left and right wheels (10) is changed. The left and right traveling wheels (10, 11) are composed of left and right front wheels (10) and left and right rear wheels (11),
The left and right rear wheels (11) are provided on the left and right rear wheel axles (75) via mounting support members (80), respectively, and the left and right mounting bosses (80) protrude to the left and right sides (80a). )
When the left and right rear wheels (11) are mounted with the left and right protrusions (80a) protruding toward the inside of the vehicle body of the traveling vehicle body (2), and toward the outside of the vehicle body of the traveling vehicle body (2). The seedling transplanter according to claim 1, wherein when the left and right rear wheels (11) are mounted so as to protrude and the left and right rear wheels (11) are spaced apart from each other. The left and right traveling transmission cases (13, 18) that transmit driving force to the left and right traveling wheels (10, 11) are respectively mounted on the traveling vehicle body (2), and the seedling planting portion (4) is mounted on the traveling vehicle body (2). And a seedling transplanting machine in which an auxiliary work device (68) including a fertilizer application device (5) for supplying fertilizer to the field and a leveling device (27) for leveling the field is detachably provided,
Attached to the left and right traveling transmission cases (13, 18) are auxiliary transmission cases (67) for transmitting driving force to the auxiliary working device (68), respectively, detachable and changeable mounting postures,
A configuration in which the fertilizer application (5) is driven by one of the left and right auxiliary transmission cases (67) and the leveling device (27) is driven by the other auxiliary transmission case (67). age,
The mounting orientation of the left and right auxiliary transmission case (67), and each different postures in transmission of the the fertilizing device (5) transmission before Symbol leveling device to (27),
The left and right traveling transmission cases (13, 18) include an upper case (83) mounted on the traveling vehicle body (2), a lower case (84) mounted slidably on the upper case (83), Each is constituted by a suspension mechanism (87) having a spring (85) in the space between the upper case (83) and the lower case (84),
The upper case (83) or the lower case (84) is formed with a pressure release portion connected to a space in which the spring (85) is arranged, or a bearing (90 between the upper case (83) and the traveling transmission member (69). The seedling transplanting machine is characterized by forming a pressure-extracted portion by extracting a part of the ball.

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