JPH10225217A - Riding mobile farm machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a riding mobile farm machine improving running behavior by constituting the transmitting shaft of a transmission of an inputting shaft for inputting engine power and a traveling and working power transmitting shaft so as to reduce the number of points of components to miniaturize. SOLUTION: In order to integrally arrange the transmission 8 at a front axle case 4, the transmitting shaft of the transmission 8 consists of the three of the inputting shaft 23 for inputting engine power, a traveling power transmitting shaft 26 transmitting the power of the shaft 23 to the case 4 and a rear wheel power fetching shaft 21 and a working power transmitting shaft for transmitting the power of the shaft 23 to a working power fetching shaft 22. In addition, it is desirable to the shaft 23 behind the case 4 and to arrange the working power transmitting shaft and a traveling power transmitting shaft 26 between the axis 23 and the case 4 in the state of vertically sorting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a riding mobile agricultural machine such as a riding rice transplanter.

[0002]

2. Description of the Related Art Generally, in this kind of riding mobile agricultural machine, engine power input to a transmission is distributed to a front axle case for driving front wheels, a rear axle case for driving rear wheels, a working machine for performing various operations, and the like. It is configured to be transmitted to.

[0003]

However, in the prior art, since the transmission is constituted by using a large number of transmission shafts (four or more transmission shafts), the number of parts cannot be increased, and the transmission becomes larger. Therefore, there was a problem of increasing the weight of the aircraft.

[0004]

SUMMARY OF THE INVENTION The present invention has been made with the object of providing a riding mobile agricultural machine capable of solving these problems in view of the above-mentioned circumstances. Engine power is input to the front axle case and the rear axle case to be driven via a transmission, and the engine power distributed by the transmission is input to a work machine. When installing the transmission, the transmission shaft of the transmission is operated by an input shaft for inputting engine power, the traveling power transmission shaft for transmitting the power of the input shaft to the front axle case and the rear wheel power take-off shaft, and the power of the input shaft. A work power transmission shaft that transmits power to the power take-off shaft. That. In other words, since the transmission is composed of the minimum necessary transmission shaft, the number of parts cannot be reduced, but the transmission can be downsized, and the weight and cost of the aircraft can be reduced. . Further, in the above-mentioned configuration, the input shaft is arranged behind the front axle case, and the working power transmission shaft and the traveling power transmission shaft are arranged vertically between the input shaft and the front axle case. is there. That is, since the power of the working power transmission shaft and the traveling power transmission shaft can be taken out rearward through the upper and lower portions of the input shaft, the vertical thickness of the transmission can be reduced as much as possible. Not only is it not possible to reduce the weight and cost, but also the running height in wet fields and the like can be improved by increasing the ground clearance as much as possible. Further, in the above-mentioned apparatus, a traveling speed fixed gear is provided on the input shaft, a traveling speed movable gear is provided on the traveling power transmission shaft, and a traveling speed back gear is provided on the working power transmission shaft. In other words, since the working power transmission shaft is also used as the traveling reverse transmission shaft, the transmission can be configured with three transmission shafts, and the reverse transmission can be performed without adding the traveling reverse transmission shaft. it can.

[0005]

Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling body of a riding rice transplanter, and the traveling body 1 has traveling power,
An engine 2 for obtaining working power and hydraulic pump driving force, a left-right split axle case 4 for driving the front wheels 3, an integrated rear axle case 6 for driving the rear wheels 5, and shifting the power input from the engine 2 After that, the front axle case 4 and the rear axle case 6
The transmission 8 is transmitted to the planting machine 7 in a distributed manner, and the front wheels 3
A lifting mechanism 11 for supporting the planting work machine 7 so as to be able to move up and down is connected to the rear of the traveling machine body 1 so as to be able to swing up and down. The mounting position of the engine 2 is set on the rear side of the front axle case 4 and on the front side of the rear axle case 6.

Reference numeral 12 denotes a main frame of the traveling body 1. The main frame 12 includes a pair of left and right frame members 12a arranged in parallel at a predetermined interval, and a front end portion and a rear end portion of the frame members 12a. A pair of front and rear connection brackets 12b, 12c for integrally connecting comrades respectively
And is integrally interposed between the front axle case (transmission) 4 and the rear axle case 6, and further supports the base end of the lifting link mechanism 11 at the rear of the frame member 12a. The link frame 13 is integrally erected.

Reference numeral 14 denotes a sub-frame for supporting the step 15 and the like. The sub-frame 14 integrally includes a frame-shaped loop frame member 14a and left and right side portions of the loop frame member 14a. And a connecting frame member 14b connected to the connecting frame member 14b. The front end of the loop frame member 14a is integrally connected to a front end of a transmission case 16 to be described later via a stay 17, while the rear end of the loop frame member 14a is integrated with the link frame 13. The connection frame member 14b is connected to the main frame 12
Is integrally connected to the front connection frame member 12b, but the loop frame member 14a
The frame is formed in a loop-shaped integral frame along the outer peripheral portion, so that the frame structure can be simplified to reduce the number of parts and improve assemblability. Is available.

Reference numeral 18 denotes the traveling body 1 and the lifting link mechanism 11
And a lifting / lowering hydraulic cylinder interposed in a front-to-back and rear-low inclination posture, and an upper end of the lifting / lowering hydraulic cylinder 18 is provided with an upper link 11 a constituting a lifting / lowering link mechanism 11.
While the lower end of the lifting hydraulic cylinder 18 is connected to the rear connection bracket 12.
c is connected to a cylinder connecting portion 12d integrally formed with the cylinder connecting portion 12d.
It is set at the axle position of the rear wheel 5 or at a position on the front side of the axle position. In other words, the weight of the lifting hydraulic cylinder 18 itself, the hanging load of the planting work machine 7 and the reaction force at the time of the lifting operation act on the axle position of the rear wheel 5 or a position on the front side thereof. . In addition, in setting the lower end side connection position of the lifting hydraulic cylinder 18 to the front side of the axle position of the rear wheel 5, in the present embodiment, the center line of the lifting hydraulic cylinder 18 passes through substantially the center of the rear wheel axle. The connection position is selected.

The front axle case 4 divided into the left and right as described above is integrally assembled to the left and right side surfaces of the transmission case 16 in which the transmission 8 is installed, and the power supplied from the transmission 8 is provided. The power is transmitted to the left and right front wheels 3 via the front wheel differential mechanism 19, and the lower final case portion 4 a to which the front wheels 3 are attached rotates with respect to the upper final case portion 4 b fixed to the front axle case 4. Because it is freely supported, the front wheels 3 are steered according to the operation of the steering wheel 9 that is interlocked and connected via the steering mechanism 10.

The transmission 8 includes an engine 2
And the power input through the belt transmission mechanism 20 is transmitted, and the shifted power is transmitted to the front wheel differential mechanism 19, the rear wheel power output shaft 21 and the work power output shaft 22. This transmission 8 (transmission part)
Is arranged at the rear of the front axle case 4 and the engine power is input behind the front axle case 4. That is, the power of the engine 2 mounted behind the front axle case 4 is transmitted to the transmission 8 and the front axle case 4 (using a relatively short power transmission mechanism (belt transmission mechanism 20) that does not pass above the front axle case 4). The transmission of the transmission 8 can be transmitted to the front axle case 19 and the rear axle case 6 and the planting operation using a relatively short power transmission mechanism that does not pass above or below the front axle case 4. Machine 7 can be transmitted.

A transmission shaft (excluding a power take-off shaft) constituting the transmission 8 includes an input shaft 23 for inputting engine power via the belt transmission mechanism 20 and a fixed gear for transmitting the power of the input shaft 23. The power of a traveling power transmission shaft 26 which is transmitted to the front wheel differential mechanism 19 via the drive wheel 24 and is transmitted to the rear wheel power take-out shaft 21 via the bevel gear mechanism 25, and the power of the input shaft 23 via the bevel gear mechanism 27. The power transmission shaft 28 is composed of a work power transmission shaft 28 that transmits power to the power take-off shaft 22. Therefore, the number of transmission shafts that constitute the transmission unit of the transmission 8 can be minimized to reduce the number of parts. Instead, the size of the transmission case 16 can be reduced.

The input shaft 23 is arranged behind the front axle case 4 (the front wheel differential mechanism 19) at a predetermined interval. The working power transmission shaft 28 and the traveling power transmission shaft 26 It is arranged between the shaft 23 and the front wheel differential mechanism 19 in a vertically distributed manner. That is, although the front-rear width of the transmission 8 can be reduced, the power of the working power transmission shaft 28 and the traveling power transmission shaft 26 can be passed through the upper and lower portions of the input shaft 23 and taken out rearward. The upper and lower width of the front axle case 4 can be substantially accommodated within the upper and lower width of the front axle case 4.

A traveling speed change mechanism 29 is provided in the transmission case 16. The traveling speed change mechanism 29 includes a traveling speed fixed gear 30 and a traveling power transmission shaft 26 provided integrally with the input shaft 23. The driving gear 31 is composed of a traveling gear 31 and a traveling gear back gear 32 rotatably provided on the working power transmission shaft 28. In the traveling speed change mechanism 29, a high-speed traveling state in which the large-diameter gear portion 30a of the traveling-speed fixed gear 30 meshes with the small-diameter gear portion 31a of the traveling-speed movable gear 31, and the small-diameter of the traveling-speed fixed gear 30 A low-speed traveling state in which the large-diameter gear portion 31b of the traveling-speed movable gear 31 meshes with the gear portion 30b, and a traveling-speed traveling state in which the large-diameter gear portion 32a always meshes with the small-diameter gear portion 30b of the traveling-speed fixed gear 30. The shift operation is performed between a low-speed running state in which the large-diameter gear portion 31b of the traveling-speed movable gear 31 meshes with the small-diameter gear portion 32b of the back gear 32, and a neutral state in which the traveling-speed movable gear 31 is not meshed with any gear portion. However, since the working power transmission shaft 28 is also used as a back gear shaft for traveling speed change, the transmission unit of the transmission 8 is constituted by three transmission shafts. There will, so that it is possible to perform a back gear (reverse gear) without especially providing a travel gear for reverse gear shaft.

33, 34 are transmission cases 1
6, a pair of stock conversion gears, which are detachably mounted on the input shaft 23 and one end of the working power transmission shaft 28, respectively. And the inter-stock conversion gear 33 meshing with each other,
Reference numeral 34 denotes a power transmission shaft 2 for shifting the power of the input shaft 23 to transmit the power.
8, when the inter-plant conversion gears 33 and 34 are replaced with gears having different transmission ratios, the planting stock of the planting work machine 7 is changed based on a relative change in the planting work speed with respect to the traveling speed. It has been changed.

A torque limiter 35 is provided on the working power transmission shaft 28. The torque limiter 35 includes a clutch 36 that is spline-fitted to the working power transmission shaft 28, and a torque limiter 35 that is connected to the working power transmission shaft 28. A clutch claw that meshes with an inclined surface is formed on a surface facing a rotatably supported bevel gear 37 (a driven bevel gear constituting the bevel gear mechanism 27).
8, the urging force is always applied to the meshing side. That is, when the work load of the planting work machine 7 exceeds the set load,
The clutch 36 is separated from the bevel gear 37 against the ammunition 38 so as to cut off the power transmission to the planting machine 7. In the present embodiment, the empty space in the transmission case 16 is used. Torque limiter 3
5, the transmission case 16
As in the conventional case in which the torque limiter 35 is disposed in a protruding shape on the outer surface of the transmission case, a cover member for the torque limiter 35 is not required, and a compact transmission case 16 having no protrusion can be formed. I can do it. Reference numeral 39 denotes a planting work clutch formed on the work power take-out shaft 22.

On the other hand, the steering mechanism 10 applies the rotational operation force of the steering wheel shaft 40 to the first transmission gear 41, the second transmission gear 42, the intermediate shaft 43, and the third transmission gear 4.
The transmission gear mechanism is configured to transmit power to the pitman arm shaft 46 via the fourth transmission gear 45 and the fourth transmission gear 45. The transmission gear mechanism is provided in the transmission case 16 at the front side of the front axle case 4. That is, before and after the front axle case 4, the transmission gear mechanism of the steering mechanism 10 and the transmission portion of the transmission 8 are arranged in a distributed manner without interfering with each other, so that the transmission case 16 is made as small as possible. You can do it.

The steering mechanism 10 is provided with any of the transmission shafts 23, 26, 2 constituting the transmission.
8 so that the pitman arm 47 can be disposed above the bottom position of the transmission case 16 so that the aircraft ground height can be as high as possible. In addition, the amount of oil filled in the transmission case 16 can be reduced to contribute to weight reduction and cost reduction.

48 is a pair of left and right side brake pedals 4
9L, 49R and a pedal shaft that supports the clutch pedal 50, and when a right side brake pedal 49R that is rotatably provided at the right end of the pedal shaft 48 is depressed, an operation is performed via the right connecting rod 51R. While the right side brake mechanism (including the disengagement operation of the right side clutch mechanism) is operated, when the left side brake pedal 49L provided integrally with the right end of the pedal shaft 48 is depressed, the pedal shaft 48 and the left side The left side brake mechanism (including the disengagement operation of the left side clutch mechanism) is actuated via the connecting rod 51L.
When a depressing operation is performed on a clutch pedal 50 that is rotatably provided at the left end of the pedal shaft 48, the main clutch mechanism is disengaged via a clutch rod 52. It is arranged between the step 15 and the transmission case 16.
That is, in the present embodiment, since the vertical width of the transmission case 16 can be made as small as possible as described above, a space is secured between the step 15 and the transmission case 16 and the space is utilized. Thus, the pedal shaft 48 and the like can be arranged.

On the other hand, the planting work machine 7 has a drive case assembly 54 connected to a rear end of the elevating link mechanism 11 via a rolling support shaft 53, and can reciprocate right and left over the drive case assembly 54. , A float 56 and the like are provided below the drive case assembly 54 so as to be vertically swingable.
The drive case assembly 54 includes a drive case 58 having an input shaft 57, a plurality of planting transmission cases 59 protruding rearward from left and right ends of the drive case 58, and a lateral feed conversion case provided at one end of the drive case 58. 60 and the like are integrally assembled. Then, the power transmitted from the transmission 8 to the input shaft 57 is transmitted to the power distribution shaft 62 in the drive case 58 via the bevel gear mechanism 61, and then via the chain transmission mechanism 63 in the lateral feed conversion case 60. Side feed shaft 6
4 and transmitted to a planting drive shaft 66 via a chain transmission mechanism 65 in each planting transmission case 59. In other words, the seedling mounting table 55 on which the mat-shaped planted seedlings are placed is reciprocated with the rotation of the lateral feed shaft 64, and the planting claw mechanism 67 attached to the planting drive shaft 66.
The planted seedlings are scraped from the seedling mounting table 55 and are planted on the rice field.

The planting transmission case 59 cuts a general-purpose tubular member such as an aluminum drawn material having the same cross section continuously into a predetermined size, and also inserts a through hole 59a for a power distribution shaft and a planting into the cut tubular member. It is formed by processing a through hole 59b for an attached drive shaft. The base end of each planted transmission case 59 is located between the right flange portion 58a of the drive case 58 and the traverse conversion case 60 or the drive case 58.
Is fixed between the left-side flange portion 58b and the cap member 68 and is tightened with the through bolt 69. A base-side boss member 71 that supports the power distribution shaft 62 (or chain sprocket 65a) via a bearing 70 is provided between the left-side planting transmission case 59 and the left-side flange portion 58b. That is,
In providing the base-side boss member 71 that supports the power distribution shaft 62 on either the left or right of each planted transmission case 59, the base-side boss member 71 is provided on the side feed conversion case 60 side of each planted transmission case 59. As a result, the traverse conversion case 6
In addition, it is not necessary to separately provide a bearing on the base 0, and the assembly direction of the base-side boss member 71 with respect to each planting transmission case 59 can be unified to facilitate assembly management.

Incidentally, the planting claw mechanism 67 includes a crank type planting claw mechanism 67A having a single planting arm 72.
And a rotary planting claw mechanism 67B having a pair of planting arms 73, and any one of the planting claw mechanisms 67 is selectively assembled according to the model or the like. That is, when assembling the crank type planting claw mechanism 67A, the intermediate portion of the planting arm 72 is connected to the planting drive shaft 66 via the crank arm 74, and the base end of the planting arm 72 is connected to the bell. It is connected to the planting transmission case 59 side via a crank 75. The planting drive shaft 6 is used to perform planting work.
6, the planting arm 72, which moves in a cranking manner, swings up and down in a complex manner by the action of the bell crank 75 to draw a predetermined movement trajectory, and in the process, scraping and planting of the planted seedlings. However, in the crank type planting claw mechanism 67A,
Each time the planting drive shaft 66 makes one rotation, planting is performed once.

On the other hand, when assembling the rotary type planting claw mechanism 67B, a pair of planting arms 73 is provided at both ends of the case, and an intermediate portion of a rotary case 77 in which a planetary gear mechanism 76 is incorporated in the case. Is connected to the planting drive shaft 66. Then, when the planting drive shaft 66 is rotated to perform the planting operation, the pair of planting arms 73 that circularly move with the rotation of the rotary case 77 are complexly rotated by the action of the planetary gear mechanism 76. Moving, drawing a predetermined locus of movement, and in the process, scraping and planting of the planted seedling. In the rotary type planting claw mechanism 67B, the planting drive shaft 66
The planting is carried out twice each time one rotation.

Reference numeral 78 denotes the planting drive shaft 6 via a bearing 79.
6 (or chain sprocket 65b), a pair of left and right distal boss members,
Numeral 8 is assembled to the planting transmission case 59 so as to close the planting drive shaft through hole 59b from the left and right. The B type functions only as a boss member, and the A also functions as a support arm for the bell crank 75. Type and are prepared. That is, an arm portion 78a extending rearward is integrally formed with the latter distal end side boss member 78A, and a rotatable pin 80 is attached to the distal end portion.
When assembling the rotary planting claw mechanism 67B, the B-type tip side boss member 78B functioning only as a boss member is pre-assembled, while when assembling the crank type planting claw mechanism 67A, A with arm 78a
The tip-side boss member 78A of the type is assembled in advance, and thereafter, the bell crank 75 of the crank-type planting claw mechanism 67A is connected to the pin 80.

In the structure described above, the engine power is distributed to the front axle case 4, the rear axle case 6, and the planting work machine 7 via the transmission 8, and the transmission constituting the transmission 8 is described. An input shaft 23 for inputting engine power; a traveling power transmission shaft 26 for transmitting the power of the input shaft 23 to the front wheel differential mechanism 19 and transmitting the power to the rear wheel power take-out shaft 21; Since the power transmission shaft 28 is configured with three power transmission shafts that transmit power to the work power take-off shaft 22, the number of transmission shafts that constitute the transmission unit of the transmission 8 can be minimized to reduce the number of parts. Not
The size of the transmission case 16 can be reduced.

Further, since the working power transmission shaft 28 and the traveling power transmission shaft 26 are arranged vertically between the input shaft 23 and the front wheel differential mechanism 19, the front-rear width of the transmission 8 can be reduced. In addition, since the power of the working power transmission shaft 28 and the traveling power transmission shaft 26 can be extracted rearward through the input shaft 23 in a distributed manner, the vertical width of the transmission 8 can be reduced by the front axle case 4. It can fit within the vertical width, and as a result, it is not possible to reduce the weight and cost of the fuselage, but also improve the running performance in wet fields by increasing the ground height of the fuselage as much as possible. be able to.

Further, since the working power transmission shaft 28 is also used as a traveling transmission back gear shaft provided with the traveling transmission back gear 32, the transmission unit of the transmission 8 is constituted by three transmission shafts. In particular, a reverse gear shift (reverse gear shift) can be performed without providing a back gear shaft for further shifting.

[Brief description of the drawings]

FIG. 1 is a side view of a riding rice transplanter.

FIG. 2 is a plan view of the same.

FIG. 3 is a perspective view of an essential part showing a connection bracket of the hydraulic cylinder for lifting.

FIG. 4 is a side sectional view of a transmission case.

FIG. 5 is a planar sectional view of the same.

FIG. 6 is a plan development sectional view of a planting working machine to which a crank type planting claw mechanism is assembled.

FIG. 7 is a side view and a front sectional view of the planting transmission case.

FIG. 8 is a plan sectional view of the same.

FIG. 9 is a plan sectional view of a main part showing an assembled state of a rotary type planting claw mechanism.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 traveling machine body 2 engine 4 front axle case 6 rear axle case 7 planting work machine 8 transmission 10 steering mechanism 16 transmission case 20 belt transmission mechanism 23 input shaft 26 traveling power transmission shaft 28 work power transmission shaft 29 traveling transmission mechanism 30 traveling speed change Fixed gear 31 Movable gear for traveling gear 32 Back gear for traveling gear

Claims (3)

[Claims] 1. A riding mobile agricultural machine which inputs engine power via a transmission to a front axle case and a rear axle case for driving front and rear wheels, respectively, and further inputs engine power distributed by the transmission to a work machine. When installing the transmission integrally in the axle case,
A transmission shaft of the transmission, an input shaft for inputting engine power, a traveling power transmission shaft for transmitting the power of the input shaft to a front axle case and a rear wheel power take-off shaft,
A riding mobile farming machine comprising a working power transmission shaft for transmitting the power of the input shaft to the working power take-out shaft. 2. An input shaft according to claim 1, wherein an input shaft is disposed behind the front axle case, and a working power transmission shaft and a traveling power transmission shaft are arranged vertically between the input shaft and the front axle case. Riding agricultural machine. 3. A traveling gear transmission shaft according to claim 1, wherein a traveling speed fixed gear is provided on the input shaft, a traveling speed moving gear is provided on the traveling power transmission shaft, and a traveling speed back gear is provided on the working power transmission shaft. Riding mobile agricultural machine equipped with.