JPH0631015B2 - Passenger paddy work vehicle - Google Patents

Description

Description: (a) Field of Industrial Application The present invention relates to a paddy field working vehicle such as a riding rice transplanter, a riding submerged paddy soil seeder, and the like, and more particularly to a body structure of the paddy working vehicle.

(b) Conventional Technology Generally, in a passenger rice transplanter, a planting device is supported behind a traveling body suspended by wheels via a link device, and the planting device is provided between the plant and the body. The hydraulic cylinder device is arranged so as to control up and down, and on the other hand, the power from the engine is transmitted to the planting device through a universal joint and a propeller shaft.
Conventionally, in order to reduce the bending angle of the universal joint, the universal joint on the traveling machine body side is installed at a lower position of the traveling machine body, and the propeller shaft extends toward the planting device at a relatively small angle.

(c) Problems to be solved by the invention For this reason, the traveling-body-side pivot shaft of the link device and the universal joint are arranged at a considerable distance,
When the planting device moves up and down, the bending of the universal joint and the axial movement of the propeller shaft are not performed smoothly due to the rotation of the link device, and unreasonable forces act on each other, reducing the strength and size of the components. However, the friction at each pivot is large, and in particular, the bending angle of the universal joint and the axial movement of the propeller shaft are large, and the durability is reduced.

(d) Means for Solving Problems Therefore, the present invention is intended to solve the above problems, and for example, as shown in FIGS. , Mission case 1 located in the front
6 and the rear axle case 17 are composed of two frames 19 and 19 for connecting and joining. Then, the rear ends of these two frames 19, 19 are connected and fixed by a U-shaped bracket 37, and the recess 37 of the bracket 37 is formed.
The intermediate case portion 42 of the rear axle case 17 is fixed to the lower surface of the a, and the universal joint 32 is further connected to the traveling body side pivot shaft 50 of the lower link 10b in the link device 10.
The propeller shaft 33 is located near the universal joint 32 and the propeller shaft 33 is recessed 37a of the U-shaped bracket.
It is characterized in that it extends toward the paddy field working device.

(e) Operation Based on the above-described configuration, the rotation of the engine 7 is transmitted to the mission in the mission case 16 to drive the front wheels 2, and the rear axle case 17 via the traveling transmission shaft 26.
It is transmitted to the inner mission and drives the rear wheels 3. At the same time, the planted transmission shaft 2 extending from the mission case 16
5 is driven, and the fuselage side universal joint 32
And planting via the propeller shaft 34 etc. (paddy work)
It is transmitted to the equipment and paddy work such as planting is performed. At this time, since the propeller shaft 33 passes through the recess 37a of the U-shaped bracket 37, the inclination angle thereof is small even though the transmission shaft 25 is installed at a relatively high position.
The universal joint 32 smoothly transmits rotation. Further, during the planting work, the planting device moves up and down due to the unevenness of the tiller, but since the pivot shaft 50 of the lower link 10b and the universal joint 32 are close to each other, the universal joint is also moved up and down. The angular movement of 32 and the axial movement of the propeller shaft 33 are small, and smooth power transmission is maintained. Further, even when the planting device is rotated or the like, the universal joint 32 and the propeller shaft 33 smoothly follow the rotation of the link device.

(f) Example An example of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the riding rice transplanter 1 has a traveling machine body 5 supported by front wheels 2 and rear wheels 3. The traveling machine body 5 has a front frame 6 at the front portion of the front wheels 2. The engine 7 is mounted, and the driver's seat 9 is arranged so that the seat 8 is positioned in the middle portion between the front and rear wheels, that is, the center of gravity of the machine. Further, behind the traveling machine body 5, a parallel link device 1 including an upper link 10a and a lower link 10b.
The planting device 11 is supported so as to be vertically movable via 0,
The planting device 11 includes a large number of planters 12 and floats 13.
Also provided is a long seedling stand 15 on which two and a half mat seedlings can be placed vertically.

On the other hand, in the traveling vehicle body 5, the mission case 16 is arranged at the front wheel portion thereof, and the rear axle case 17 is arranged at the rear wheel portion thereof.
Is arranged, and both cases 16 and 17 are
Two frames 19, each of which has a pipe structure with a rectangular cross section,
The traveling machine body 5 is configured by being connected and coupled by 19. Further, the transmission case 16 has an input pulley 20 installed on one side thereof so that power is transmitted from the engine 7 to the mission in the case, and front axles 21 and 21 are connected and supported on both sides of the case. The front wheel 2 is vertically movably suspended, and power is transmitted to the front wheel. The mission case 16 is mounted on the bracket 22 fixed to the front ends of the two frames 19, 19 as shown in FIGS. 2 and 3 in detail.
It is fixed through 3 and the mission case 16
The planted transmission shaft 25 extends rearward on one side of the center line C-C and above the frame 19, and on the other side of the center line C-C and on the frame 1.
9, a travel transmission shaft 26 extends at a position below 9, and a hydraulic cylinder device 29 having a small diameter and a long stroke, which is vertically swingable by a pin 27 below the frame 19 on the center line C-C. The cylinder ends are connected. The planted transmission shaft 25 is attached to the frame 19
Is supported by a bearing 31 installed on one of the seat rear posts 46, which will be described later, and is further interlocked with the reception device 11 via a universal joint 32 and a propeller shaft 33. Also, the traveling transmission shaft 2
6 also extends in parallel with the frame 19 and is interlocked with the rear axle case 17. The hydraulic cylinder device 29 extends slightly upward on the center line C-C, and its piston tip is pin 36 between the two bracket plates 35, 35 fixed to the upper link 10a.
(See FIG. 5).

On the other hand, as shown in detail in FIGS. 4 to 6, the rear axle case 17 is composed of the left and right axle case portions 43, 43 and the intermediate case portion 42, and the rear axle is supported by the axle case portion 43. The rotation from the traveling power transmission shaft 26 is transmitted to the rear wheel 3 via the shaft and gear in the case 17. Further, a U-shaped bracket 37 is disposed so as to bridge between the rear ends of the two frames 19 and 19, and the end surfaces of the two frames 19 and 19 and the U-shaped bracket 37 are fixed to each other. While being fixed via the plate 39,
The end fixing plate 39 and the side surface of one frame are fixed to each other via a side fixing plate 40.
And the lower surfaces of the two frames 19 and 19 to the lower fixing plate 41.
It is fixed through. And U-shaped bracket 3
The lower surface of the concave portion 37a of 7 and the upper surface of the intermediate case portion 42 forming the rear axle case 17 are fixed via a plurality of bolts, and the side surface of the intermediate case portion 42, the side fixing plate 40, and the lower fixing plate 41 are fixed. And are respectively fixed via bolts.

Further, as shown in detail in FIG. 4, front seat posts 45, 45 and rear posts 46, 46 are respectively erected from the frames 19, 19 and a seat base fixedly mounted on the upper ends of these posts. A seat 9 is rotatably and fixedly installed on a 47, and if necessary, a reinforcing plate 4 is provided between the front post 45 and the rear post 45 in a staggered manner.
4 is fixed (FIG. 2). Further, a bracket 48a is fixedly installed on one side of the seat front post 45, and an operating lever 48 is pivotally supported on the bracket 48a such that its operating portion is located on the side of the seat 9. .
Further, the upper link 10a and the lower link 10b are respectively provided on the upper and lower parts of the rear posts 46, 46 with shafts 49,
It is pivoted by 50. This makes link 10
The rear post 46 and the seat base 47, which are firmly configured to support the a and 10b, are fixed to each other, and the front post 45 and the seat base 47 are connected and fixed to each other at the substantially center of gravity of the seat 9. Since the seat 9 is supported by the link device 10, the seat 9 can be firmly supported to reduce vibration, and the rear post 46 that pivotally supports the link is also reinforced, and the planting device is connected via the link device 10. The rear post 46 on which the load of 11 acts is extremely robust, and the operation lever 48 can be installed at an optimal position for operation without requiring a special supporting member. In a side view, the universal joint 32 is arranged near the pivot shaft 50 of the lower link 10b, and the propeller shaft 33 extends from the universal joint 32 to the U-shaped bracket 3.
The recess 37a of FIG. 7 and a notch 37b in which the rear end of the recess 37 is notched extend toward the planting device 11.

Since the present embodiment is configured as described above, the rotation of the engine 7 is transmitted to the input pulley 20 via the belt,
The transmission in the mission case 16 is appropriately changed in speed and transmitted to the front wheels 2, the traveling transmission shaft 26, and the planted transmission shaft 25. Further, it is transmitted to the mission in the rear axle case 17 via the traveling transmission shaft 26, and the rear wheels 3 are transferred to the front wheels 2.
The rice transplanter 1 is driven in synchronization with. At the same time, power is transmitted to the planting device 11 via the planting transmission shaft 25, the universal joint 32, and the propeller shaft 33, and the planter 12, the seedling stand 15 and the like are driven to perform planting work. At this time, since the planted transmission shaft 25 is arranged at a relatively high position due to the arrangement of the hydraulic cylinder device 29 and the frames 19 and 19, the universal joint 3
2 is also at a high position, but as shown in FIG. 4, the propeller shaft 33 extends through the concave portion 37a of the U-shaped bracket 37 and the cutout portion 37b.
Even in the planted state in which the
Is gentle, so that the universal joint 32 can smoothly transmit the rotation without being largely bent. Further, based on the vertical movement of the float 13, the hydraulic cylinder device 29 expands and contracts to subtly control the planting device 11 so that the planting device 11 is in a constant planting state regardless of the unevenness of the tiller. Since the pivot shaft 50 and the universal joint 32 are close to each other, the angular movement of the universal joint 32 and the axial movement of the propeller shaft 33 are small and smooth power transmission is maintained even when the planting device is moved up and down. . Further, since the rice transplanter 1 is rotated at the end of the field, when the hydraulic cylinder device 29 is extended to raise the planting device 11, the position of the universal joint 32 is brought close to the pivot shaft of the lower link 10b and the lower link 10b. Since the propeller shaft 33 and the propeller shaft 33 rotate at substantially the same pivotal position, the universal joint 32 and the propeller shaft 33 smoothly follow the lower link 10b, and the link device 10 and the planted transmission shaft 2
5, universal joint 32, propeller shaft 3
Unreasonable force such as twisting to 3 does not act.

In addition, although the above-mentioned embodiment explained the riding rice transplanter,
Of course, it can be applied to other paddy field work vehicles such as a submerged paddy field soil seeder.

(g) Effects of the Invention As described above, according to the present invention, even though the universal joint 32 is installed at a relatively high position, the propeller shaft 33 is passed through the concave portion 37a of the U-shaped bracket 37 to perform paddy work. Since it is extended toward the device 11, the bending angle of the universal joint 32 can be used at a small angle less than the use limit, smooth rotation can be maintained, and the position of the universal joint 32 can be set on the pivot shaft 50 of the lower link 10b. Since they are arranged close to each other, the angular movement of the universal joint 32 and the propeller shaft 3 are prevented even when the working device 11 moves up and down during the planting work.
The axial movement of 3 is small, smooth power transmission can be maintained, and even when the working device 11 is moved up and down when turning, an unreasonable force acts on the link device 10, the universal joint 32, and the propeller shaft 33. As a result, the link device 10, the universal joint 32, the propeller shaft 33, and the like can be small and lightweight, and the sliding portions 49, 50, particularly the universal joint 32 and the propeller shaft 33 can be moved in the axial direction. The sliding amount of the sliding portion can be reduced, and the durability can be improved. Further, the traveling machine body 5 includes two frames 1 that connect and join the mission case 16 and the rear axle case 17.
9 and 19, and the rear end portions of these two frames are fixed to the lower surface of the recess 37a of the U-shaped bracket 37 with the intermediate case portion 42 of the rear axle case 17, so that the traveling machine body 5 moves in the left-right direction. It has a robust structure that does not rattle.

[Brief description of drawings]

1 is an overall side view showing a riding rice transplanter according to an embodiment of the present invention, FIG. 2 is a view showing a main part of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG. 2 is a perspective view of FIG. 2, FIG. 5 is a rear view seen from the direction V of FIG. 1, and FIG. 6 is a bottom view seen from the direction VI of FIG. 1-passenger paddy work vehicle (passenger rice transplanter), 5-traveling vehicle, 7-engine, 10-link device, 10b-
Lower link, 16 ... Mission case, 17 ... Rear axle case, 19 ... Frame, 32 ... Universal joint, 33 ... Propeller shaft, 37 ...
U-shaped bracket, 37a ... Recess, 42 ... Intermediate case, 50 ... Pivot shaft.

Claims (1)

[Claims] 1. A paddy field working device is movably supported by a link device at the rear of a traveling machine body having an engine mounted on the front part and a driver's seat disposed at the rear of the engine, and the power from the engine is provided. In a passenger paddy field vehicle in which the vehicle is transmitted to the paddy field working device via a universal joint and a propeller shaft, two frames for connecting and coupling the traveling machine body to a mission case and a rear axle case located in the front part. In addition, the rear end portions of these two frames are connected and fixed by a U-shaped bracket, the intermediate case portion of the rear axle case is fixed to the lower surface of the concave portion of the bracket, and the universal joint is further attached. The lower link in the link device is located in the vicinity of the main body supporting shaft of the traveling body, and the propeller is connected to the universal joint. A passenger paddy work vehicle, wherein a shaft extends toward a paddy work apparatus through a recess of the U-shaped bracket.