JP3949115B2 - Riding machine - Google Patents

Description

  FIG. 1 shows a riding rice transplanter as an example of a riding agricultural machine to which the present invention is applied. In this riding rice transplanter, a four-row seedling planting device 5 can be moved up and down via a hydraulically driven link mechanism 4 at the rear of a four-wheel drive type traveling machine body 3 having a front wheel 1 and a rear wheel 2. Concatenated. As shown in FIGS. 1 and 3, an engine 6 is mounted on the front portion of the traveling body 3, and the output of the engine 6 is transmitted to a transmission case 7 that pivotally supports the front wheels 1 via a belt transmission device 8. The gear is changed by 7 and the front wheel 1 is driven. The output extracted from the transmission case 7 is transmitted to the rear transmission case 9 that pivotally supports the rear wheel 2, and the working power extracted from the transmission case 7 is transmitted to the seedling planting device 5.

As shown in FIGS. 3 and 4, a pitman arm 11 swinging left and right around the axis a by the steering handle 10 is provided in a cantilever direction at the bottom of the mission case 7. The front end and the knuckle arms 12 of the left and right front wheels 1 are interlocked and connected by tie rods 13 to form a steering link mechanism 14 for the front wheels 1.
As shown in FIG. 4, the operation arm 24 a extending left and right from the balance arm 24 and the side clutch and brake 43 of the left and right rear wheels 2 are linked by a wire 65, and the steering lever 26 is moved from the straight position. When the front wheel 1 is steered by operating to the left or right beyond the set angle, the side clutch / brake 43 of the rear wheel 2 inside the steer is operated and the rear wheel 2 inside the steer is stopped. Yes. As a result, it is possible to control the traveling machine body 3 with a small turn from the ground. In this case, when the steering lever 26 is operated to the left or right from the straight traveling position by a set angle or more, only the side clutch of the rear wheel 2 may be turned off.

  As shown in FIG. 3 and FIG. 6, a sprocket 15 as a rotating member is connected to the lower end portion of the pitman arm 11 concentrically with the shaft center a, and as a rotating operation member at a position on the front side of the pitman arm 11 The operation sprocket 16 is rotatably provided around an axis b parallel to the axis a, and the sprocket 15 and the operation sprocket 16 are wound and interlocked by a chain 17 as an interlocking member.

As shown in FIG. 6 , the operation sprocket 16 is rotatably supported by a fixed boss 19 fixed to the traveling machine body 3, and is spline-fitted or key-fitted to the operation sprocket 16 at the center of the fixed boss 19. The operation shaft 20 is inserted so as to be slidable up and down. The upper portion of the operation shaft 20 is supported by a fixed boss 22 via a rotation boss 21, and a rotation bracket 23 extending forward from the rotation boss 21 is connected to the axis b so as to be rotatable left and right. . A balance arm 24 is supported so as to be rotatable up and down around a lateral axis c of the rotating bracket 23, and the rear end of the balance arm 24 and the operation shaft 20 are connected by a pin 25, and the axis c of the balance arm 24 is connected. The operation shaft 20 is slid up and down along the axis b along with the surrounding vertical rotation. A steering lever 26 as a gripping operation tool is connected to the front end of the balance arm 24 around the lateral axis c so as to swing up and down.

  As shown in FIG. 3, when the steering lever 26 is tilted forward, the balance arm 24 integrated with the steering lever 26 rotates around the axis c, and the rear end of the balance arm 24 is moved upward. The operation shaft 20 is slid upward.

  As shown in FIG. 6, a disk 28 having a pair of pins 27 erected upward is fixed to the lower end of the operation shaft 20, and an engagement hole 29 facing the pin 27 is provided in the operation sprocket 16. In a state where the operation shaft 20 is slid downward, the pin 27 is detached from the engagement hole 29, the linkage between the operation shaft 20 and the operation sprocket 16 is broken, and the operation shaft 20 is slid upward. As a result, the pin 27 is engaged with the engagement hole 29 and the operation shaft 20 and the operation sprocket 16 are connected.

  As described above, when the steering lever 26 is set in the standing posture, the linkage between the operation shaft 20 and the operation sprocket 16 is broken, and when the steering lever 26 is tilted forward, the operation shaft 20 and the operation sprocket 16 are moved. A linkage interrupting mechanism 30 to be connected is configured.

  Thus, in a state where the steering lever 26 is tilted forward and the operating shaft 20 and the operating sprocket 16 are connected, the operating shaft 20 is moved together with the rotating bracket 23 by swinging the steering lever 26 left and right. The operation sprocket 16 can be rotated to rotate, the rotation of the operation sprocket 16 is transmitted to the sprocket 15 by the chain 17, and the pitman arm 11 is forcibly operated in the same direction as the operation direction of the steering lever 26. .

As shown in FIG. 6, an engagement pin 61 that can be inserted into and removed from the balance arm 24 is provided, and a plurality of engagement holes 62 into which the engagement pins 61 are inserted into the rotating bracket 23 are arcs centered on the axis c. Formed on top. The balance arm 24 and the steering lever 26 are integrated, and the steering lever 26 can be fixed and used in a plurality of lying postures. Accordingly, it is possible to operate the steering lever 26 by applying a force in the vertical direction while operating the steering lever 26 sideways.

As shown in FIG. 8, when the traveling machine body 3 is taken in and out of the field through a relatively steep slope, or when the traveling machine body 3 is loaded onto or unloaded from a truck bed using a step board, the traveling machine body 3 is used. When maneuvering with a large forward / backward inclination, the steering lever 26 is tilted forward to connect the operating shaft 20 and the operating sprocket 16 so that an operator standing on the ground in front of the traveling body 3 By swinging the steering lever 26 to the left and right, the pitman arm 11 is forcibly operated to steer in a desired direction while moving the traveling machine body 3 at an extremely low speed. When the disk 28 comes into contact with the lower surface of the operation sprocket 16, the steering lever 26 can no longer fall down. In this state, the push-down force of the steering lever 26 is transmitted to the front part of the traveling body 3 to travel. It is possible to maneuver while preventing the front part of the body 3 from being lifted.

As shown in FIGS. 6 and 7 , a check pin 35 protrudes rearward from the upper end of the operation shaft 20, and a V-shaped guide recess 37 is formed in the check fitting 36 provided on the traveling machine body 3 side. . As a result, when the steering lever 26 is set to the standing posture while sliding the operation shaft 20 downward, the steering lever 26 is directed to the front side of the traveling machine body 3 (the straight traveling state where the pitman arm 11 is directed forward). Thus, the steering lever 26 is in the standing posture.

  In the case of steering from the ground using the steering lever 26, the following structure is provided in order to stop the traveling machine body 3. As shown in FIGS. 2 and 4, a main clutch pedal 41 is provided at the left front portion of the driving step 40 of the traveling machine body 3, and a pair of left and right steering pedals 42 are provided at the right front portion of the driving step 40. The steering pedal 42 and the left and right side clutches / brakes 43 provided in the rear transmission case 9 are independently linked by a rod 44.

  As shown in FIGS. 2, 4, and 5, the main clutch lever 45 extends forward from the main clutch pedal 41, and the main clutch pedal 41 can be manually cut from the front portion of the traveling machine body 3. . A linkage shaft 46 that rotates in conjunction with the clutch disengagement operation of the main clutch pedal 41 is provided, and the right end of the linkage shaft 46 and the left and right steering pedals 42 are linked via a linkage fitting 48 having a long hole interchange 47. When the main clutch pedal 41 is disengaged, the left and right steering pedals 42 are operated in the depression direction via the linkage bracket 48, and the left and right side clutches and brakes 43 are simultaneously operated, so that the aircraft is stopped. Is called. The main clutch pedal 41 can be locked and fixed at the depression operation position by the lock lever 49, and is used when the traveling machine body 3 is stopped in an inclined state.

  As shown in FIGS. 2 and 3, a loop-shaped handle portion 26 a is formed at the tip of the steering lever 26, and the traveling body 3 is moved back and forth by holding the handle portion 26 a of the steering lever 26 in the lying posture. It can be easily pushed and pulled. The steering lever 26 is provided with a sighting tool 50 for visually confirming the advancing direction of the traveling vehicle body 3 during planting traveling work. Fold it back and use it. As shown by a two-dot chain line in FIG. 3, during maintenance for opening and closing the engine bonnet 51 and inspecting and maintaining the engine 6, the sighting tool 50 is lifted and used to lock and hold the engine bonnet 51 in the open posture. You can also.

[Another Embodiment of the Invention]
The present invention can also be implemented in the following forms.
(1) For simplicity, the steering lever 26 and the operation sprocket 16 may be always interlocked.

(2) As shown in FIG. 9 , a main clutch lever 64 linked to the main clutch pedal 41 via a wire 63 is provided near the handle portion 26a of the steering lever 26, and the handle portion 26a and the main clutch lever 64 are provided. It is convenient to configure so that the traveling machine body 3 can be stopped by performing a joint grip operation.

(3) The linkage interrupting mechanism 30 for linking and releasing the steering lever 26 and the operation sprocket 16 can be configured to be switched by a dedicated operation lever or the like.

(4) In a model in which the left and right rear wheels 2 are driven via the differential mechanism and the side brake, if the steering lever 26 is operated from the straight advance position to the left or right by a set angle or more, the side brake of the rear wheel 2 inside the steering is released. It is also possible to make a small turn during ground maneuvering by braking.

(5) The sprocket 15 as a rotation member that rotates integrally with the pitman arm 11 and the operation sprocket 16 as a rotation operation member that rotates by the steering lever 26 are changed to gears, and the sprocket 15 and the operation sprocket 16 are changed to intermediate gears. Thus, the pitman arm 11 can be rotated in the operation direction of the steering lever 26. The pivoting member that rotates integrally with the pitman arm 11 and the pivoting operation member that rotates by the steering lever 26 are constituted by an arm member, and the steering lever 26 can also be connected by connecting the sprocket 15 and the operating sprocket 16 with a rod. It is possible to operate the pitman arm 11 in the operating direction.

(6) As a simple structure, the steering lever 26 is configured to be attachable to and detachable from the operation sprocket 16, and the operation sprocket 16 is rotated by the attached steering lever 26 only in the case of ground maneuvering, thereby performing normal boarding maneuvering. Sometimes the steering lever 26 can be removed and stored.

Overall side view of riding rice transplanter Perspective view of the front of the traveling aircraft Side view of the front of the traveling aircraft Schematic plan view of the control system of the traveling aircraft Side view of the main clutch pedal and steering pedal operating system Longitudinal side view near the base of the steering lever Rear view near the base of the steering lever Side view showing the state during ground control The top view of the vicinity of the steering lever in another embodiment of the invention

Explanation of symbols

1 front wheel 3 traveling machine body 4 link mechanism 5 seedling planting device (work machine)
26 steering lever (grip operating tool)
30 linkage intermittent mechanism

Claims (6)

In the riding type farm work machine in which the work machine (5) is connected to the traveling machine body (3) via the link mechanism (4)
A grip operating tool (26) having a base end pivotably supported around a horizontal axis is provided at the left and right center of the front portion of the traveling machine body (3) .
An upright posture in which the grip operation tool (26) is erected at the center of the front left and right of the traveling machine body (3), and a lying posture in which the tip of the grip operation tool (26) swings forward from the standing posture. And can be switched to
A riding type farm working machine configured to be able to fix the grip operating tool (26) in a plurality of lying postures . The riding type farm working machine according to claim 1, further comprising a mechanism for stopping a driving force inside the turning by operating the grip operating tool (26). The riding type farm working machine according to claim 2 , wherein the mechanism for stopping the driving force inside the turning by the operation of the grip operating tool (26) is a side clutch . The riding type farm working machine according to claim 2 , wherein the mechanism for stopping the driving force inside the turning by the operation of the grip operating tool (26) is a side brake . The grip operation tool (26) is linked to a steering operation system for steering the front wheel (1) to the left and right, and the front wheel (1) is operated by swinging the grip operation tool (26) in the left-right direction in the lying posture. ) Is configured to be steered right and left. The riding type agricultural working machine according to any one of claims 1 to 4. The riding type farm working machine according to claim 5, further comprising a linkage interrupting mechanism (30) capable of switching the grip operating tool (26) between a linkage state linked to the steering operation system and a linkage release state not linked.

Images