JP4405885B2 - Paddy field work vehicle - Google Patents

Description

  The present invention relates to a transmission structure in a paddy field work vehicle such as a riding rice transplanter or a riding direct sowing machine.

  In the rice paddy machine that is an example of a paddy field work vehicle, as disclosed in Patent Documents 1 and 2, the right and left rear wheels are supported by the body via a suspension mechanism with respect to the right and left front wheels. There is something that is configured to improve the running performance on paddy fields and roads. As a structure for supporting the right and left rear wheels to the airframe via a suspension mechanism, the rear ends of the right and left are supported at the rear ends of the right and left support cases that can swing up and down independently as in Patent Documents 1 and 2, respectively. There are a structure for supporting the wheel and a structure for supporting the rear axle case including the right and left rear wheels on the airframe via a suspension mechanism.

JP 2004-17934 A JP 2003-81140 A

In the paddy field work vehicle, the machine body is provided with a hopper for storing powder particles (for example, fertilizer and seeds) and a feeding unit so that the powder particles fed from the feeding unit are supplied to the rice field through the supply unit. There is a configuration (see Patent Document 1). In this case, it is necessary to configure such that the power of the engine is transmitted to the feeding portion and the feeding portion is driven.
The present invention is a paddy work vehicle configured to support the right and left rear wheels to the airframe via a suspension mechanism. When the airframe is provided with a hopper for storing powder particles and a feeding portion, the engine power is delivered. It is intended to be configured to be properly transmitted to the part.

[I]
(Constitution)
The first feature of the present invention is that the paddy field vehicle is configured as follows.
The engine is mounted on the fuselage, the mission case is fixed to the fuselage, the rear axle case with the right and left rear wheels is supported on the fuselage via the suspension mechanism, and the engine power is transmitted to the mission case. The power of the travel output shaft provided in is transmitted to the rear axle case via the universal joint and the transmission shaft. The machine body is provided with a hopper for storing powder particles and a feeding unit, and the powder material fed from the feeding unit is supplied to the rice field via the supply unit . Than the self standing joint comprises a transmission mechanism for transmitting the feeding unit takes out the power of the traveling output shaft from the power transmission direction upstream side position. A rear axle case is supported on a support member of the airframe via a suspension mechanism, and a transmission mechanism is disposed between the support member of the airframe and the rear axle case in a side view.

(Function)
According to the first feature of the present invention, the rear axle case having the right and left rear wheels is supported by the airframe via the suspension mechanism, and the positional relationship between the right and left rear axle cases and the airframe changes. . On the other hand, since the mission case is fixed to the airframe, the positional relationship between the mission case and the airframe does not change, and the hopper and the feeding part are also provided in the airframe. The positional relationship of is not changed.

  Thus, according to the first feature of the present invention, since the transmission mechanism is installed across the traveling output shaft and the feeding portion provided in the transmission case where the positional relationship with the airframe does not change, the right and left rear wheels Even if the positional relationship between the aircraft and the aircraft changes or the attitude of the aircraft changes, the positional relationship between the transmission mechanism and the aircraft does not change, and the engine power is transmitted to the mission case. The power from the travel output shaft is properly transmitted to the feeding section without difficulty.

According to the first feature of the present invention, when the rear axle case is supported on the support member of the fuselage via the suspension mechanism, a slight gap is formed between the support member of the fuselage and the rear axle case. Utilizing this, the transmission mechanism is disposed between the support member of the fuselage and the rear axle case, and the transmission mechanism is located above the rear axle case.

(The invention's effect)
According to the first feature of the present invention, in the paddy field work vehicle configured to support the right and left rear wheels on the airframe via the suspension mechanism, the airframe is provided with a hopper for storing powder particles and a feeding portion. From the part of the traveling output shaft where the positional relationship with the aircraft does not change, the power transmission mechanism can reasonably and appropriately transmit the power to the feeding part, and the power transmission efficiency to the feeding part can be improved. .

According to the first aspect of the present invention, the transmission mechanism is arranged between the support member of the fuselage and the rear axle case by effectively utilizing the gap between the support member of the fuselage and the rear axle case. The mechanism can be arranged without waste, which is advantageous in terms of space saving.
According to the first feature of the present invention, the transmission mechanism is located on the upper side of the rear axle case, and the transmission mechanism is less likely to come into contact with the paddle surface, so that the transmission mechanism is prevented from being damaged and improved in durability. It became advantageous in terms.

[II]
(Constitution)
The second feature of the present invention resides in the following configuration in the paddy field work vehicle of the first feature of the present invention.
In the vicinity of the traveling output shaft of the transmission mechanism, a clutch capable of transmitting and interrupting power is provided.

(Function)
According to the second feature of the present invention, the “action” described in the preceding item [I] of the first feature of the present invention is provided, and in addition to this, the following “action” is provided.
When the transmission mechanism is provided with a clutch capable of transmitting and shutting off the power to the feeding portion, according to the second feature of the present invention, the clutch is provided in the vicinity of the traveling output shaft in the transmission mechanism. Thus, according to the second feature of the present invention, the clutch is disposed at a position close to the transmission case, so that the operation system (operation rod, operation link, etc.) connected to the transmission case is connected to the clutch. The operating system (operating rod, operating link, etc.) is close to each other, so that the operating system connected to the mission case and the operating system connected to the clutch can be easily arranged in a compact manner. become.

(The invention's effect)
According to the second feature of the present invention, it has the “effect of the invention” described in the preceding item [I] of the first feature of the present invention, and in addition, the following “effect of the invention”. .
According to the second feature of the present invention, when the transmission mechanism is provided with a clutch capable of transmitting and shutting off the power to the feeding portion, the operation system connected to the transmission case and the operation system connected to the clutch are combined in a compact manner. Arrangement can be easily performed, which is advantageous in terms of space saving for simplification of the structure and arrangement of the operation system.

[III]
(Constitution)
The third feature of the present invention resides in the following configuration in the paddy field work vehicle of the first or second feature of the present invention.
The transmission mechanism is supported on the support member of the airframe .

(Function)
According to the third feature of the present invention, the “action” described in the preceding item [I] [II] is provided in the same manner as the first or second feature of the present invention . In addition, the following “action” is provided. It has.
According to the third aspect of the present invention, in addition to the rear axle case being supported by the support member of the airframe via the suspension mechanism, the transmission mechanism is supported by the support member of the airframe. Thus, according to the third feature of the present invention, the rear axle case and the transmission mechanism are supported by the support member of the fuselage, which is a common member, so that transmission is performed between the support member of the fuselage and the rear axle case. With the mechanism disposed, the positional relationship between the rear axle case and the transmission mechanism can be determined with high accuracy.

(The invention's effect)
According to a third aspect of the present invention, similarly to the first or second aspect of the present invention set forth in the preceding paragraph [I] Ri Contact comprise "Effect of the Invention" as described in [II], the following in addition to “Effect of the invention” is provided.
According to the third feature of the present invention, the positional relationship between the rear axle case and the transmission mechanism can be accurately determined in a state where the transmission mechanism is disposed between the support member of the fuselage and the rear axle case. Even if the positional relationship between the axle case and the fuselage (the support member of the fuselage) changes, the rear axle case can be configured to appropriately avoid interference with the transmission mechanism (from the rear axle case to the transmission mechanism unnecessarily. Does not need to be released).

[1]
As shown in FIG. 1, a link mechanism 3 and a hydraulic cylinder 4 that drives the link mechanism 3 to move up and down are provided at the rear part of the airframe having right and left front wheels 1 and right and left rear wheels 2. A seedling planting device 5 is supported at the rear of the mechanism 3 to constitute a riding type rice transplanter as an example of a paddy field work vehicle.

  As shown in FIG. 1, the seedling planting device 5 includes a transmission case 6, a planting case 7 that is rotatably supported at the rear part of the transmission case 6, and a pair of plantings provided at both ends of the planting case 7. The arm 8, the grounding float 9, and the seedling platform 10 are provided. As a result, the planting case 7 is rotationally driven as the seedling platform 10 is driven to reciprocate laterally to the left and right, and the planting arm 8 alternately takes out the seedlings from the lower part of the seedling platform 10 so that Plant.

As shown in FIGS. 1 and 4, a hopper 12 for storing fertilizer and a feeding portion 13 are fixed to the rear side of the driver seat 11, and a blower 14 is provided below the driver seat 11. The ground float 9 is provided with a groover 15 (corresponding to a supply part), and a hose 16 is connected across the feeding part 13 and the groover 15. As a result, the fertilizer is fed from the hopper 12 by a predetermined amount by the feeding section 13 along with the seedling planting as described above, and the fertilizer is supplied to the groove producing device 15 through the hose 16 by the blower 14 blowing. Yes, fertilizer is supplied to the rice field through the groove producing device 15.
By storing the seed pods in the hopper 12 instead of the fertilizer, a direct sowing operation for supplying the seed potatoes from the hopper 12 to the rice field via the groove producing device 15 can also be performed (in this case, the seedling planting device 5 is stopped). .

[2]
Next, support structures for the right and left front wheels 1 and the right and left rear wheels 2 will be described.
As shown in FIGS. 1, 3, and 5, the transmission case 17 is fixed to the front portion of the airframe, and the engine 19 is supported on a support frame 18 connected to the front portion of the transmission case 17. Square pipe-shaped right and left fuselage frames 21 (corresponding to the support members of the fuselage) are connected to the upper part of the rear part of the transmission case 17 and extend rearward. A reinforcing member 20 having a triangular shape in side view is connected to the body frame 21.

  As shown in FIGS. 1 and 5, right and left front axle cases 23 are extended from the right and left lateral sides of the mission case 17, and cylindrical ends are formed at the ends of the right and left front axle cases 23. A support portion 23a is provided obliquely forward and downward (see the vertical axis P1). A front wheel support portion 24 that supports the right and left front wheels 1 is supported by the support portion 23a of the right and left front axle cases 23 so as to be rotatable around the vertical axis P1 and slidable in the direction of the vertical axis P1. Yes. As shown in FIGS. 2, 3, and 5, a pitman arm 25 is swingably supported around the longitudinal axis P <b> 8 at the lower portion of the mission case 17 and extends rearward. A tie rod 26 is connected over the entire area. As shown in FIG. 1, a steering handle 27 for swinging the pitman arm 25 is provided, and the right and left front wheels 1 are steered by swinging the pitman arm 25 with the steering handle 27. .

  As shown in FIGS. 3, 5, and 6, a rear axle case 28 is integrally formed, and the right and left rear wheels 2 are supported by the rear axle case 28. Vertical right and left brackets 22 having a U-shaped cross section are fixed to the front portion of the rear axle case 28, and right and left upper links 29 are vertically moved around the horizontal axis P2 at the top of the right and left brackets 22. A right and left upper link 29 swings up and down around a horizontal axis P3 of a bracket 21a that is supported in a swingable manner and extends forward and is fixed to an intermediate portion of the right and left airframe frames 21. It is supported freely.

  As shown in FIGS. 3, 5, and 6, support pins 31 are fixed laterally outwardly to the lower portions of the right and left brackets 22, and right and left lower links 30 are formed around the horizontal axis P <b> 4 of the support pins 31. It is supported so that it can swing up and down and extends forward, and the right and left lower links 30 are supported so as to swing up and down around the horizontal axis P5 at the lower part of the rear part of the transmission case 17. . The receiving part 21b is fixed to the right and left body frames 21, the receiving part 31a is fixed to the support pin 31, and the receiving part 21b of the right and left body frame 21 and the receiving part 31a of the support pin 31 are connected to each other. The right and left suspension springs 32 (corresponding to suspension mechanisms) are attached. As shown in FIGS. 5 and 6, a lateral rod 34 is supported so as to be swingable up and down around the front and rear axis P6 at the rear end of the left fuselage frame 21, and the right and left front and rear shafts of the rear axle case 28 are supported. A lateral rod 34 is supported around the core P7 so as to be swingable up and down.

  As a result, as shown in FIGS. 3, 5, and 6, the rear axle case 28 is supported by the right and left suspension springs 32 so as to move up and down and roll freely, and the right and left upper links 29, right and left The lower link 30 determines the position of the rear axle case 28 in the front-rear direction, and the lateral rod 34 determines the position of the rear axle case 28 in the left-right direction.

[3]
Next, the transmission structure to the right and left front wheels 1 will be described.
As shown in FIGS. 5 and 7, a hydrostatic continuously variable transmission 33 is connected to the left lateral portion of the transmission case 17, and the power of the engine 19 is transmitted to the hydrostatic continuously variable transmission 33. The power transmitted to the hydrostatic continuously variable transmission 33 is transmitted to the hydraulic pump 37 via the transmission shaft 36 as it is.

  As shown in FIG. 7, the power of the output shaft 33a of the hydrostatic continuously variable transmission 33 is transmitted to the transmission shaft 56 through the transmission gear 55, and the transmission shaft 56 has a low speed gear 57, a high speed gear 58, and a transmission. A gear 59 is fixed. A shift gear 61 is externally fitted to the transmission shaft 60 arranged in parallel with the transmission shaft 56 so as to be integrally rotatable and slidable with the transmission shaft 60 in a spline structure, and the transmission gear 62 is fixed to the transmission shaft 60. As a result, the shift gear 61 is slid and meshed with the low speed gear 57 and the high speed gear 58, whereby the power of the transmission shaft 56 is shifted in two steps to be transmitted to the transmission shaft 60.

  As shown in FIGS. 7 and 9, a pair of transmission shafts 63 are arranged to face each other across the transmission case 17 and the right and left front axle cases 23, and a differential mechanism 64 is provided between the pair of transmission shafts 63. The transmission gear 65 fixed to the case 64 a of the differential mechanism 64 meshes with the transmission gear 62, and the bevel gear 66 is fixed to the ends of the pair of transmission shafts 63. A cylindrical member 81 is externally fitted to one transmission shaft 63 by a key structure so as to be integrally rotatable and slidable. By engaging the cylindrical member 81 with an end portion of the case 64a of the differential mechanism 64, the differential mechanism 64 is locked. It can be.

  As shown in FIG. 9, a bevel gear 68 (upper side) and a receiving member 69 (lower side) are supported by a support portion 23a of the right and left front axle cases 23 via a bearing 67, and the bevel gears 66 and 68 are engaged with each other. ing. The transmission shaft 70 is attached to the bevel gear 68 and the receiving member 69 so as to be integrally rotatable and slidable by a spline structure, and the bevel gear 71 is fixed to the lower end of the transmission shaft 70.

  As shown in FIG. 9, the front wheel support portion 24 is provided with an axle 72 that supports the right (left) front wheel 1, a bevel gear 73 fixed to the axle 72, and a cylindrical sleeve 74 at the upper end of the front wheel support portion 24. It is fixed. The front wheel support 24 and the sleeve 74 are rotatably supported by the transmission shaft 70 by bearings 75, and a seal member 76 is provided between the support 23 a and the sleeve 74 of the right and left front axle cases 23, and the bevel gear 71. 73 are biting. A receiving member 77 is applied to the upper bearing 75, and the suspension spring 40 is provided between the receiving members 69 and 77 in a double manner on the inner side and the outer side.

  As a result, as shown in FIGS. 7 and 9, the power of the output shaft 33 a of the hydrostatic continuously variable transmission 33 is transmitted via the transmission shafts 56 and 60, the differential mechanism 64, the transmission shafts 63 and 70, and the axle 72. It is transmitted to the right and left front wheels 1. The front wheel support portion 24 is supported by the support portions 23a of the right and left front axle cases 23 so as to be rotatable about the vertical axis P1 and slidable in the direction of the vertical axis P1. The suspension spring 40 acts on the slide in the direction of the core P1.

[4]
Next, the transmission structure of the rear axle case 28 to the right and left rear wheels 2 will be described.
As shown in FIGS. 2, 3, and 7, a traveling output shaft 78 is provided at a lower portion of the rear portion of the transmission case 17 (slightly to the right of the center CL on the left and right sides in plan view) and protrudes rearward. Is engaged with a bevel gear 80 fixed to the traveling output shaft 78. A universal joint 82 is attached to the end of the travel output shaft 78, and the transmission shaft 84 is connected to the universal joint 82 via a cylindrical joint 83 (allowing the transmission shaft 84 to slide relative to the universal joint 82 while transmitting power). ing. An input shaft 38 protrudes forward from the front portion of the rear axle case 28 (slightly to the right of the center CL on the left and right sides), and the transmission shaft 84 and the input shaft 38 are connected via a universal joint 82.

  As shown in FIG. 2, a transmission shaft 39 is provided in the rear axle case 28, and a bevel gear 38 a fixed to the input shaft 38 is engaged with a bevel gear 39 a fixed to the transmission shaft 39. Friction multi-plate type right and left side clutches 41 are provided at the right and left ends of the transmission shaft 39, and an axle 43 that supports the right and left side clutches 41 and the right and left rear wheels 2. Between them, a transmission shaft 42 is provided. As a result, as shown in FIGS. 2, 3, and 7, the power of the output shaft 33 a of the hydrostatic continuously variable transmission 33 is transmitted to the transmission shafts 56 and 60, the case 64 a of the differential mechanism 64, the travel output shaft 78, and the transmission shaft 84. These are transmitted to the right and left rear wheels 2 through the input shaft 38, the transmission shaft 39, the right and left side clutch 41, and the transmission shaft 42.

  As shown in FIG. 7, a plurality of friction plates 44 are provided between the wall portion inside the mission case 17 and the travel output shaft 78, and the disc-shaped operation member 45 is attached to the travel output shaft 78 so as to be rotatable relative to the travel output shaft 78. It is fitted. The operating shaft 46 is rotatably supported so as to cross the lower side of the travel output shaft 78, the intermediate portion 46a of the operating shaft 46 is formed in a semi-moon shape, and the intermediate portion 46a of the operating shaft 46 is operated. It is in contact with the rear end of the member 45. As described above, the friction plate 44, the operation member 45, the operation shaft 46, and the like constitute the brake 47, and the brake pedal (not shown), the operation shaft 46, and the hydrostatic continuously variable transmission 33 are mechanically connected. Are linked together.

  As a result, when the brake pedal is depressed, the hydrostatic continuously variable transmission 33 is operated to the neutral stop position, and the operation shaft 46 is rotated by a predetermined angle in the clockwise direction in FIG. The operating member 45 is pushed upward in the drawing of FIG. 7 by the intermediate portion 46a of 46, the operating member 45 presses the friction plate 44, and the brake 47 is operated to the braking side. As shown in FIGS. 2, 7, and 9, when the brake 47 is operated to the braking side, the right and left front wheels 1 are braked via the differential mechanism 64 and the transmission shafts 63 and 70. 78, the right and left rear wheels 2 are braked via the transmission shaft 84, the input shaft 38, the transmission shaft 39, the right and left side clutches 41, and the transmission shaft 42.

  As shown in FIG. 2, the right and left side clutches 41 are urged to a transmission state by springs (not shown), and the right and left operation arms for operating the right and left side clutches 41 in the disengaged state. 51 and a linkage rod 53 is connected across the pitman arm 25 and the right and left operation arms 51. The state shown in FIG. 2 is a state in which the right and left front wheels 1 are steered to the rectilinear position A0, and the right and left side clutch 41 are operated to the transmission state, and the right and left front wheels 1 Power is transmitted to the right and left rear wheels 2. Even if the right and left front wheels 1 are steered between the rectilinear position A0 and the right and left set angles A1, the above-described state occurs, and the aircraft moves straight or gently to the right or left. Change.

  As shown in FIG. 2, when the right and left front wheels 1 are steered between the right set angle A1 and the right steer limit A2, the right linkage rod 53 is pulled by the pitman arm 25. Thus, the right side arm 41 is operated to the disengaged state by the right operating arm 53, and the right rear wheel 2 is in a freely rotating state. In this case, the left side clutch 41 is left in a transmission state, and power is transmitted to the left rear wheel 2. When the right and left front wheels 1 are steered between the left set angle A1 and the left steering limit A2, the left linkage rod 53 is pulled by the pitman arm 25, and the left operation arm 53 is operated. As a result, the left side clutch 41 is operated in the disconnected state, and the left rear wheel 2 is in a free rotating state. In this case, the right side clutch 41 is left in a transmission state, and power is transmitted to the right rear wheel 2.

  As described above, when the right and left front wheels 1 are steered between the right set angle A1 and the right steer limit A2, or between the left set angle A1 and the left steer limit A2. In the state where the power is transmitted to the right and left front wheels 1 and the rear wheel 2 outside the turning, the power to the rear wheel 2 on the turning center side is cut off, and the rear wheel 2 on the turning center side is in a freely rotating state. , Turn right or left. As a result, the rear wheel 2 on the turn center side moves forward while appropriately rotating along with the turn, and the state in which the surface is roughened by the rear wheel 2 on the turn center side during turning is reduced.

[5]
Next, the transmission structure to the seedling planting device 5 will be described.
As shown in FIGS. 7 and 8, the transmission gear 48 and the six transmission gears 49 are connected to each other so as to rotate integrally, so that the transmission gear 48 and the six transmission gears 49 are rotatable relative to the transmission shaft 60. The transmission gears 48 and 59 are engaged with each other. Six transmission gears 52 are fitted on a transmission shaft 50 arranged in parallel with the transmission shaft 60 so as to be relatively rotatable, and the six transmission gears 49 and 52 are engaged with each other. An operation rod 54 is provided which can select one of the transmission gears 52 and can be connected to and disconnected from the transmission shaft 50. As described above, the stock transmission 85 is constituted by the six transmission gears 49, 52 and the operation rod 54, and one of the six transmission gears 52 is selected by the operation rod 54. By connecting to the transmission shaft 50, the power of the transmission shaft 60 is shifted to six stages and transmitted to the transmission shaft 50.

  As shown in FIGS. 5 and 8, an output shaft 86 is provided at the lower portion of the rear portion of the mission case 17 (position of the left and right center CL of the airframe in plan view) and protrudes rearward so that the output shaft 86 can rotate relative to the output shaft 86. The externally fitted bevel gear 87 is engaged with a bevel gear 88 fixed to the transmission shaft 50. A shift member 89 is externally fitted to the output shaft 86 so as to be rotatable and slidable integrally with the output shaft 86 in a spline structure, and a spring 90 is provided to bias the shift member 89 toward the occlusal side with the bevel gear 87. An operating rod 91 is provided to release the power, and thereby, a planting clutch 92 that can transmit and shut the power of the transmission shaft 50 to and from the output shaft 86 is configured.

  As shown in FIGS. 1, 5 and 6, a transmission shaft 93 is connected to an output shaft 86 and extends rearward, and is disposed at the position of the left and right center CL of the airframe in plan view. The transmission shaft 93 is rotatably supported by a support portion 94 fixed to the transmission 21, and the transmission shaft 93 is disposed on the upper side of the rear axle case 28 (the right and left body frames 21 and the rear axle case in a side view). 28). A transmission shaft 95 is connected to the transmission shaft 93 via a universal joint 82, and the transmission shaft 95 is connected to the seedling planting device 5. As a result, as shown in FIGS. 5, 7, and 8, the power of the transmission shaft 60 is transmitted through the inter-strain transmission device 85, the bevel gears 87 and 88, the planting clutch 92, the output shaft 86, and the transmission shafts 93 and 95. It is transmitted to the attaching device 5.

[6]
Next, a transmission structure to the feeding unit 13 will be described.
As shown in FIGS. 3, 5, and 10, a transmission gear 96 is fixed to a portion of the travel output shaft 78 that protrudes from the transmission case 17 between the universal joint 82 and the transmission case 17 of the travel output shaft 78. A transmission case 97 (corresponding to a transmission mechanism) is externally fitted to the traveling output shaft 78 and the transmission gear 96 via a bearing 98 so as to cover the transmission gear 96, and the traveling output shaft 78 and the transmission gear are thus fitted. A transmission case 97 is connected to the mission case 17 so as not to be rotated together with 96.

  As shown in FIGS. 3, 5, and 10, the transmission case 97 is provided with an output shaft 99 and protrudes rearward, and the output shaft 99 is located at a lower portion of the rear portion of the transmission case 17 (a little of the left and right center CL in the plan view). Located on the right). In the transmission case 97, the transmission gear 100 is fitted on the output shaft 99 so as to be relatively rotatable, the transmission gears 96 and 100 are engaged, and the shift member 101 is rotated and slid integrally with the output shaft 99 in a spline structure. A spring 102 that is freely fitted and urges the shift member 101 toward the occlusal side with the transmission gear 100 is provided. As a result, a clutch 103 is configured in the transmission case 97 so that the power of the travel output shaft 78 can be transmitted to and disconnected from the output shaft 99.

  As shown in FIG. 3, an operation arm 104 for operating the clutch 103 in the disengaged state (operation for moving the shift member 101 away from the transmission gear 100) is provided on the right side of the transmission case 97, and an opening 20 a is formed in the reinforcing member 20. The operation arm 104 faces the opening 20 a of the reinforcing member 20. As shown in FIGS. 3 and 8, the operation rod 91 for operating the planting clutch 92 in the disengaged state (the operation for moving the shift member 89 away from the bevel gear 87) protrudes from the mission case 17 to the right as in the operation arm 104. Yes.

  As shown in FIGS. 3, 4, and 5, a transmission shaft 105 (corresponding to a transmission mechanism) is connected to the output shaft 99 and extends rearward, and is arranged at a position slightly to the right of the left and right center CL in plan view. The transmission shaft 105 is rotatably supported by the support portions 106 fixed to the right and left body frames 21, and the transmission shaft 105 is disposed on the upper side of the rear axle case 28 (right and left in a side view). It is disposed between the left body frame 21 and the rear axle case 28). An operation arm 105 a is fixed to the transmission shaft 105, and a linkage rod 107 (corresponding to a transmission mechanism) is connected across the input portion 13 a of the feeding portion 13 positioned above and the operation arm 105 a of the transmission shaft 105. Yes. As a result, the power of the travel output shaft 78 is transmitted to the transmission shaft 105 via the transmission case 97 (the transmission gears 96 and 100, the clutch 103 and the output shaft 99), and the rotational power of the transmission shaft 105 is used as the power of pushing and pulling. The signal is transmitted to the input unit 13 a of the feeding unit 13 through the linkage rod 107.

The configuration shown in FIG. 11 is different from the present invention described in the claims.
As shown in FIG. 11, the support frame 108 is fixed to the rear axle case 28 and extended upward instead of fixing the hopper 12 for storing fertilizer and the feeding portion 13 to the rear side of the driver seat 11. The hopper 12 and the feeding unit 13 are fixed to the slab 108. With this configuration, the output shaft 109 is provided at the rear portion of the rear axle case 28, and the power of the input shaft 38 is branched and transmitted to the output shaft 109. The operation arm 109a and the feeding portion of the output shaft 109 are configured. The linkage rod 110 is connected to 13 input portions 13a.
As a result, the power of the travel output shaft 78 is transmitted to the output shaft 109 via the transmission shaft 84 and the input shaft 38, and the rotational power of the output shaft 109 serves as push-pull power via the linkage rod 110. 13 input units 13a.

Overall left side view of riding rice transplanter Plan view showing the transmission system to the rear axle case, right and left rear wheels Rear side view showing rear axle case support structure, transmission system from transmission case to rear axle case, and transmission system from transmission case to feeding section Left side view showing rear axle case support structure, transmission system from transmission case to rear axle case, and transmission system from transmission case to feeding section Plan view showing support structure of rear axle case, transmission system from transmission case to rear axle case, and transmission system from transmission case to feeding part Front view of rear axle case support structure, transmission system from the transmission case to the rear axle case, transmission system from the transmission case to the feeding section, transmission system from the transmission case to the seedling planting device Cross-sectional plan view of the mission case Cross-sectional plan view of the transmission case in the vicinity of the stock transmission Longitudinal front view near the front wheel support Longitudinal right side view near the traveling output shaft and transmission case Left side view showing rear axle case support structure, transmission system from transmission case to rear axle case, and transmission system from transmission case to feeding section

2 Right and left rear wheels 12 Hopper 13 Feeding portion 15 Supplying portion 17 Mission case 19 Engine 21 Airframe support member 28 Rear axle case 32 Suspension mechanism 78 Traveling output shaft 82 Universal joint 84 Transmission shaft 97, 105, 107 Transmission mechanism 103 clutch

Claims (3)

The engine is mounted on the fuselage, the transmission case is fixed to the fuselage, the rear axle case with the right and left rear wheels is supported on the fuselage via the suspension mechanism,
The power of the engine is transmitted to the transmission case, and the power of the traveling output shaft provided in the transmission case is configured to be transmitted to the rear axle case through a universal joint and a transmission shaft.
The machine body is provided with a hopper and a feeding unit for storing powder particles, and the powder material fed from the feeding unit is configured to be supplied to the surface via the supply unit,
A power transmission mechanism that extracts the power of the travel output shaft from the position on the upper side of the power transmission direction than the universal joint and transmits the power to the feeding portion ;
A paddy field work vehicle in which the rear axle case is supported on a support member of a machine body via the suspension mechanism, and the transmission mechanism is disposed between the support member of the machine body and the rear axle case in a side view .   The paddy field work vehicle according to claim 1, wherein a clutch capable of transmitting and shutting off power is provided in a vicinity of a traveling output shaft in the transmission mechanism. The paddy field work vehicle according to claim 1 or 2, wherein the transmission mechanism is supported by a support member of the machine body .

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