JP4816001B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle such as a riding rice transplanter.

A seedling planting device in a riding type rice transplanter, which is currently widely used, is connected to the rear of the traveling vehicle body, and when seedlings are planted, they are lowered onto paddy fields to plant seedlings. In parallel with the seedling planting work, fertilizer made of powder from the fertilizer is dropped into a fertilization groove formed near the side of the seedling planting strip. At this time, in the conventional fertilizer application device, the fertilizer feed unit located below the fertilizer tank is fed downward by a predetermined amount, and the fed granular fertilizer is blown from the blower provided on the side of the fertilizer feed unit to the air chamber and It is designed to be dropped into the fertilizer groove via a fertilizer hose.
JP 2004-81099 A

The fertilizer application disclosed in the above-mentioned patent documents has a configuration in which a blower is disposed on the side of a fertilizer feeding portion and the blower is driven by an electric motor, and an extra power source other than the engine is used. Further, when the blower is driven via the belt using power from the engine without using the electric motor, it is necessary to adjust the arrangement position of the blower in order to make the belt drive system simple. However, in order to adjust the position of the blower, it is necessary to adjust the positional relationship between the blower and the air chamber provided between the fertilizer feed hose, and the power from the engine is transmitted to the blower via the belt. In addition, it is difficult to adjust the arrangement positions of the blower and the air chamber.
The subject of this invention is providing the work vehicle provided with the fertilizer which can transmit the motive power from an engine to a blower via a belt with a comparatively simple structure.

The above-mentioned problem of the present invention is solved by the following means.
That is, the present invention relates to a prime mover (9), a traveling vehicle body (1) that travels with power from the prime mover (9), and a work device (7) provided on the rear side of the traveling vehicle body (1) so as to be movable up and down. And a granular material storage tank (41) provided at the rear of the traveling vehicle body (1) and on the front side of the working device (7), and a granular material feeding unit (under the storage tank (41)) ( 42), an air chamber (48) for temporarily storing the pressure air for transporting the powder material fed by the powder material delivery unit (42), and the pressure air to the air chamber (48). The blower to be supplied (47), the pressurized air supply path (49) for supplying the pressurized air from the blower (47) to the air chamber (48), and the endless power for transmitting the power from the prime mover (9) to the blower (47) The belt (14a) is fed around the swing fulcrum (46b) arranged on the air chamber (48) side. Machine (47) is swung to a working vehicle that includes a blower mobile flange (46) that allows changing the distance from the prime mover (9) of the blower (47).

  According to the present invention, the air blower (47) is swung around the swing fulcrum (46b) of the blower moving flange (46) disposed on the air chamber (48) side to change the distance from the prime mover (9). Therefore, even if the flange (46) is swung, the positional relationship between the blower (47) and the air chamber (48) does not change so much, so that the supply of pressurized air to the air chamber (48) is stable. Moreover, stabilization of the granular material transfer accuracy can be achieved.

A four-row planting type rice transplanter as an embodiment of the present invention will be described in detail with reference to the drawings. A side view of the riding rice transplanter is shown in FIG. 1, and a plan view is shown in FIG.
A pair of left and right front wheels 2, 2 and rear wheels 3, 3 serving as traveling wheels are installed before and after the traveling vehicle body 1. A steering device having an operation box 4 and a steering handle 5 and the like is provided on the front step 6 at the front upper part of the vehicle body, and a seedling planting part 7 is attached to the rear part of the vehicle body so as to be movable up and down. A driver's seat 8 is provided on the rear side of the operation box 4, and an engine 9 that transmits power to each part of the rice transplanter is mounted below the driver's seat 8. The rear portion of step 6 also serves as a fender cover for the rear wheel 3. In this specification, the left direction and the right direction toward the forward side of the riding rice transplanter are referred to as the left side and the right side, respectively.

  The seedling planting unit 7 includes a seedling mounting tank 10 that reciprocates left and right, a planting device 11 that cuts out one seedling and transplants it into the soil, a float 12 that levels the seedling planting surface, and the like. The engine 9 is driven to transmit to an input shaft (not shown) via the engine output pulley 13, the transmission belt 14 b and the mission input pulley 15, and the power is transmitted into the mission case 17 by the input shaft.

  The transmission is transmitted from the transmission case 17 to the left and right front wheel drive case 19 through a front wheel axle case projecting in the left and right direction, and the front wheel axle 20 is driven to rotate to drive the left and right front wheels 2 and 2. Also, left and right rear wheel transmission shafts 21 for transmitting power from the rear part of the transmission case 17 to the rear are provided, and the left and right rear wheel transmission shafts 21 are driven to transmit into the left and right rear wheel transmission cases 22 to The wheel axle 23 is rotationally driven to drive the left and right rear wheels 3 and 3.

  The seedling planting section 7 is provided so as to be moved up and down by the vertical movement of the lifting link mechanism 25 by expansion and contraction of the hydraulic lifting cylinder 24. In addition, the seedling planting portion 7 is configured to operate by being transmitted by a planting transmission shaft 26 extending rearward from the case 17 by the power from the transmission case 17.

  The steering handle 5 is steered by steering the left and right front wheels 2 and 2 via a steering shaft 27 and a pitman arm (not shown), a tie rod, and the like. A main transmission lever 29 is provided on the left side of the steering handle 5, and a throttle lever 30 is provided on the right side. In addition, a stop lever 31 for stopping the driving of the aircraft and driving of the seedling planting unit 7 is provided on the left side of the operation box 4, and a planting capable of moving the seedling planting unit 7 up and down and driving on and off is provided on the right side. Attaching / elevating lever 32 (FIG. 2) is provided.

  A main clutch pedal 33 (FIG. 2) is provided at a position on the left side of the front portion of the vehicle body 1. The operation of the main body and the driving of the seedling planting unit 7 are stopped by the depression operation of the main clutch pedal 33. Further, a brake operating tool (hereinafter referred to as a brake pedal) 34 (FIG. 2) is provided at a position near the right side of the front portion of the vehicle body 1. The brake pedal 34 operates a four-wheel brake device (not shown) in the transmission case 17 via a connecting mechanism (not shown) by depressing the pedal 34 to brake the left and right front and rear wheels 2 and 3. It is composed. The main clutch pedal 33 may be omitted, and the main clutch may be disengaged at the same time when the brake pedal 34 is depressed.

  In the present embodiment, a fertilizer application device 40 is provided behind the driver's seat 8. The fertilizer application device 40 feeds the granular fertilizer stored in the fertilizer tank 41 by a fixed amount by the feeding portions 42,..., And applies the fertilizer to the left and right sides of the float 12 with the fertilizer hose 43,. Are introduced into a fertilization structure formed in the vicinity of the side portion of the seedling planting row by a grooved body 45 provided on the front side of the fertilizer application guide 44.

  Further, the driving force of the engine 9 is transmitted by a belt 14a via a pulley 47a disposed below the driver's seat 8, the blower 47 rotates, and the air generated by the blower 47 is changed from the air chamber 48 which is long in the left-right direction to the chamber. It is blown into the fertilizer hose 43, ... via the hose 49, ..., and the fertilizer in the fertilizer hose 43, ... is forcibly conveyed by wind pressure.

Further, by configuring the U-shaped chamber hose 49,... With an elastic body, maintenance of the feeding portion 42 can be performed from the driver's seat 8 side.
In addition, if a small drainage hole is provided below the blower 47 so that there is no problem with blowing air, it can prevent water from being accumulated in the blower 47 when the car is washed and blown out when the blower 47 is used. it can.
As shown in the side view of the blower 47 in FIG. 3, the drain hole 47b is provided with a lid so that the hole 47b is opened only when the blower 47 is not in operation. When 47c is closed and the engine 9 is turned off, the lid 47c is preferably a spring lid or the like so that a light force is applied so that the lid 47c is pushed upward.

FIG. 4 shows a left side view of the work machine at a portion where the blower 47 and the air chamber 48 are installed, and FIG. 5 shows a rear view of the work machine. Further, FIG. 6A shows a simplified left side view of a portion where the blower 47 and the air chamber 48 are installed, and FIG. 6B shows a plan view thereof.
A rubber pipe 48 a is provided as a connecting pipe for absorbing a change in the position of the blower 47 in the pressurized air supply path from the blower 47 to the air chamber 48.

The fan drive shaft 47e of the blower 47 is provided with a pulley 47a for transmitting a driving force from the engine 9, and a blower moving flange 46 for changing the installation position of the pulley 47a to adjust the length of the belt 14a. Is provided so as to be swingable in the front-rear direction.
The blower moving flange 46 is provided with a swinging fulcrum 46b at its upper end, and a long hole 46a is provided at the end opposite to the swinging fulcrum 46b around the fan drive shaft 47e which is also the drive shaft of the pulley 47a. Yes. The swinging fulcrum 46b of the blower moving flange 46 is rotatably supported by a frame 59 fixed to the step receiving frame 52, and the oblong hole 46a of the blower moving flange 46 on the opposite side of the swinging fulcrum 46b has a horizontal frame 57. Since the pin 58a of the support plate 58 provided in the front is inserted, the blower moving flange 46 can swing around the swing fulcrum 46b.

  At this time, since the swing fulcrum 46b is provided at the upper end portion of the flange 46, the positional relationship between the blower outlet of the blower 47 and the air inlet of the air chamber 48 does not change much even if the flange 46 is swung. The supply of the pressure air to the air chamber 48 is stabilized, and the granular material transfer accuracy can be stabilized.

  Further, since the piping 48a for connecting the blower 47 and the air chamber 48 is made of rubber, even if the blower 47 is slightly swung, the piping 48a is fixed between the air chamber 48 and the blower 47 fixed to the airframe. Misalignment can be absorbed.

  Further, if the connecting pipe 48a is a rigid body and the air chamber 48 is supported by the pipe 48a and the air chamber 48 is also moved back and forth as the position of the blower 47 is changed, Since the positional relationship with the air chamber 48 does not change so much, the supply of pressurized air to the air chamber 48 is stabilized, and the accuracy of the granular material transfer can be stabilized.

  Further, as shown in the side view of the main part of the blower 47 in FIG. 7, the swing fulcrum 46 b of the blower moving flange 46 may be provided at the outlet of the blower 47. Also in this case, the swing fulcrum 46b of the blower moving flange 46 during adjustment of the belt 14a hardly moves relative to the outlet portion of the blower 47.

  Also, as shown in FIGS. 4 and 5, a blower 47 is disposed between the outer frame 55 of the fuselage and the engine 9, and a muffler 51 is provided obliquely downward below the front of the blower 47. At this time, the blower 47 is disposed at the lower left rear of step 6 and the muffler 51 is attached to the left rear portion of the engine 9. A square-pipe horizontal frame 57 is provided behind the machine body outer frame 55, and between the round pipe-shaped step receiving frames 52 extending in a direction parallel to the frame 57 above these frames 52, 57. Thus, the blower 47 is supported, and the space between the outer frame 55 and the step receiving frame 52 is fixed by a plate 56.

  Since the blower 47 is arranged under the step receiving frame 52 that receives the step 6, compared with the electric motor type blower arranged above the step 6, the inside of the frame 52, 55, 57 and the plate 56 of the fuselage Blower-related parts can be effectively arranged in a small space.

  The round pipe-shaped step receiving frame 52 may bend in the vertical direction, but the blower 47 connects the round pipe-shaped step receiving frame 52 at the upper rear and the square pipe-shaped horizontal frame 57 at the lower rear. Therefore, the blower 47 itself can increase the rigidity of the step receiving frame 52 and can prevent deflection.

  Further, since the blower moving flange 46 also supports both the frames 52 and 55 between the body outer frame frame 55 and the step receiving frame 52, the blower moving flange 46 also serves to reinforce these frames 52 and 55.

  Further, power transmission from the engine 9 to the blower 47 is performed by the transmission belt 14a, and power transmission from the engine 9 to the traveling device in the transmission case 17 is performed by the transmission belt 14b. 40 and the transmission case 17 are disposed, and the traction force from the engine 9 is applied in the opposite direction by the transmission belts 14a and 14b, respectively, thereby preventing the engine 9 from being pulled in one direction by the belt 14a or 14b. The balance of the driving force transmission system can be improved.

  In addition, as shown in the rear view of the rice transplanter in FIG. 5, a blower 47 is arranged on the lower left side between the fertilization tanks 41, 41 arranged separately on the left and right sides, and the planting part 7 is planted on the lower right side. A planting transmission shaft 26 for driving the clutch and a fertilization drive output shaft 61 for driving the feeding portion 42 of the fertilizer application apparatus 40 are arranged. According to this structure, a power transmission mechanism can be arrange | positioned with sufficient balance in the left-right direction of a body.

  Further, the fertilization drive output shaft 61 is disposed obliquely above the planting transmission shaft 26, and the planting transmission shaft 26 and the fertilization drive output shaft 61 are disposed in a planting clutch case 62 that is disposed to be inclined with respect to the field scene. By providing, the planting clutch case 62 does not interfere with the rear wheel 3, and it is possible to prevent the fertilization drive output shaft 61 and the planting transmission shaft 26 from interfering when the planting part 7 is raised. With the above configuration, these members could be installed compactly even in a four-row rice transplanter with a narrow tread.

  Further, as shown in the side view of the main part of the fertilizer device 40 in FIG. 8 (FIG. 8A) and the rear plan view of the step 6 (FIG. 8B), the air chamber 48 and the funnel part of the fertilizer tank 41 A configuration may be adopted in which the chamber hose 49 connecting the two is disposed so as to pass through the hole 6 a formed in the step 6 of the vehicle body 1. In this case, the fertilizer tank 41 can be arrange | positioned in a position lower than before, and the height of the whole rice transplanter can be made low.

  The fertilizer tank 41 shown in the side view of FIG. 9 may be configured such that the rear part of the feeding part 42 is hooked on the drive shaft 36 and the front part of the feeding part 42 can be fixed with a clip-type lock 38. Thus, the feeding portion 42 can be opened forward with the drive shaft 36 as a fulcrum. Since the operator can open the feeding part 42 from the driver's seat 8, the maintenance of the feeding part 42 becomes possible.

Further, as shown in the rear view of the main part of the fertilizer tank 41 in FIG. 10, the fertilizer tank 41 is arranged on both sides of the driver seat 8, and the height of the tank 41 and the height of the driver seat 8 are made substantially the same. Yes.
With the above configuration, the upper surface of the fertilizer tank 41 serves as an armrest for an operator who is in the driver's seat 8, and workability can be improved because the backrest portion of the driver's seat 8 does not get in the way when the fertilizer tank 41 is supplied with fertilizer.

FIG. 11 is a schematic plan view of a riding type rice transplanter in which a fertilizer application device 40 including a fertilizer tank 41 according to another embodiment of the present invention is disposed in the vicinity of the driver's seat 8.
As shown in FIG. 11, a pair of fertilizer application devices 40 are provided on the left and right sides of the driver's seat 8, and a space is provided in the middle portion thereof. It protrudes in a shape along 42.

  Therefore, even if the fertilizer 40 is attached to the vehicle body 1, the step 6 can be detached from the vehicle body 1, and the center of the rear end protrudes into a shape along the feeding portion 42 of the fertilizer tank 40 of the fertilizer tank 41. Therefore, even if the fertilizer leaks from the fertilizer tank 41, the fertilizer does not fall below the step 6. As a result, there is an anti-rust effect on important functional parts below step 6.

  In addition, an air chamber 48 is provided in front of the feeding portion 42, and the air chamber 48 has a convex portion rearward in the plan view in the rear portion of the driver's seat 8. Space that can be used can be secured and workability can be improved. In addition, if the central portion of the air chamber 48 is fixed and both end portions (shaded portions) 48b are made of an elastic body and can be removed, the maintainability of the removing portion is good.

  Further, a fertilizer spare tank 37 can be disposed in the space between the left and right fertilizer tanks 41, 41 as shown in the rear view of the fertilizer tank portion in FIG. 12 and the perspective view of the spare tank in FIG. . Since the reserve tank 37 is provided with concave handles 37a at both upper and lower ends and a fertilizer charging port 37b is provided on the upper surface, the fertilizer tank 41 can be easily replenished with fertilizer even during farming.

  In addition, as shown in FIG. 6A, since the suction port 47d of the blower 47 is arranged above the muffler 51, the air warmed by the muffler 51 can be easily sucked into the blower 47. In a blower using an electric motor, if the electric motor is disposed in the vicinity of the engine 9, the motor loses its durability due to heat from the engine 9. However, in the case of the mechanical blower 47 of the present embodiment, the engine 9 is relatively Even if the blower 47 is disposed nearby, the blower 47 is hardly affected by heat, so the suction port 47d of the blower 47 can be disposed in the vicinity of the muffler 51 from which the heat from the engine 9 is discharged. The blower 47 can inhale air.

  The work vehicle of the present invention can be used as a compact seedling transplanter such as a riding rice transplanter.

1 is an overall side view of a passenger rice transplanter according to an embodiment of the present invention. It is a whole top view of the riding rice transplanter of FIG. It is a side view of the blower of the fertilizer application of the riding rice transplanter of FIG. It is a principal part left view of the fertilizer application part of the riding rice transplanter of FIG. It is a principal part rear view of the fertilizer application part of the riding rice transplanter of FIG. It is the principal part left view (FIG. 6 (a)) and top view (FIG. 6 (b)) of the fertilizer application part of the riding rice transplanter of FIG. It is a principal part left view of the fertilizer application part of the other Example of this invention. It is the principal part left view (FIG. 8 (a)) of the fertilizer applicator installation part of the other Example of this invention, and the partial top view (FIG.8 (b)) of a step part. It is a principal part left view of the fertilizer application part of the other Example of this invention. It is a principal part rear view of the fertilizer application part of the other Example of this invention. It is a top view of the fertilizer application part of other examples of the present invention, and the step corresponding to it. It is a principal part rear view explaining installation of the fertilizer reserve tank arrange | positioned between the fertilizer application of FIG. It is a perspective view of the reserve tank of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Front wheel 3 Rear wheel 4 Operation box 5 Steering handle 6 Step 6a Hole 7 Seedling planting part 8 Driver's seat 9 Engine 10 Seedling tank 11 Planting device 12 Float 13 Engine output pulleys 14a and 14b Transmission belt 15 Mission input pulley 17 transmission case 19 left and right front wheel drive case 20 front wheel axle 21 rear wheel transmission shaft 22 rear wheel transmission case 23 rear wheel axle 24 hydraulic lifting cylinder 25 lifting link mechanism 26 planting transmission shaft 27 steering shaft 29 main speed change lever 30 throttle lever 31 stop Lever 32 Planting / elevating lever 33 Main clutch pedal 34 Brake pedal 36 Drive shaft 37 Spare tank 37a Handle 37b Fertilizer inlet 38 Clip lock 40 Fertilizer 41 Fertilizer tank 42 Feeding section 43 Fertilizer hose 44 Fertilizer guide 45 Groove body 46 Blower moving flange 46a Long hole 46b Oscillating fulcrum 47 Blower 47a Pulley 47b Drain hole 47c Lid 47d Suction port 47e Fan drive shaft 48 Air chamber 48a Connecting pipe 48b Air chamber end 49 Chamber hose 51 Muffler 52 Step receiving frame 52a Oscillating fulcrum 55 Outer frame frame of aircraft
56 Plate 57 Square pipe-shaped horizontal frame 58 Support plate 58a Pin 59 Frame 61 Fertilization drive output shaft 62 Planting clutch case

Claims (1)

A prime mover (9), a traveling vehicle body (1) that travels with the power from the prime mover (9), a working device (7) that can be moved up and down on the rear side of the traveling vehicle body (1), and a traveling vehicle body (1 ) And a powder storage tank (41) provided on the front side of the working device (7), a powder supply part (42) provided in the lower part of the storage tank (41), and the powder An air chamber (48) for temporarily storing the pressure air for transferring the granular material fed by the granule feeding portion (42), and a blower (47) for supplying the pressure air to the air chamber (48) A pressurized air supply path (49) for supplying pressurized air from the blower (47) to the air chamber (48), an endless belt (14a) for transmitting the power from the prime mover (9) to the blower (47), The blower (47) is swung around the swing fulcrum (46b) arranged on the air chamber (48) side. Te, the work vehicle, characterized in that a blower mobile flange (46) that allows changing the distance from the prime mover (9) of the blower (47).

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