JP7041609B2 - Passenger porting machine - Google Patents

Description

The present invention relates to a passenger port equipped with a steering angle detecting mechanism for detecting a steering angle of a front wheel.

A passenger porting machine provided with a steering angle detecting mechanism for detecting a steering angle of a front wheel is known (see, for example, Patent Document 1). The steering angle detection mechanism is indispensable for a model equipped with an automatic turning control function that automatically raises the planting work machine according to the turning operation of the steering handle, and an automatic turning control function is added. In that case, it is necessary to provide a steering angle detection mechanism.

Japanese Unexamined Patent Publication No. 2010-837

However, the conventional steering angle detection mechanism as shown in Patent Document 1 is at least a linking mechanism that links a rotation angle detection sensor such as a potentiometer with the steering angle detection sensor and a steering member such as a pitman arm. Therefore, there is a problem that the number of parts and the cost increase.

The present invention has been created for the purpose of solving these problems in view of the above circumstances, and the invention of claim 1 is to steer the left and right front wheels according to the operation of the steering handle. The mechanism, the left and right side clutches that are built in the rear axle case and individually switch power transmission to the left and right rear wheels, and the front wheel steering mechanism and the left and right side clutches are mechanically linked to turn the steering handle. The front wheel corresponds to the operation of the side clutch interlocking mechanism that automatically disengages the side clutch on the inside of the turn according to the operation and the disengagement operation tool in the state where the side clutch on the inside of the turn is automatically disengaged. A passenger transplant machine including a side clutch linkage release operation mechanism for releasing the linkage between the steering mechanism and the left and right side clutches, and a steering angle detection mechanism for detecting the steering angle of the front wheels, wherein the side clutch linkage is released. The operating mechanism includes a linking release member that rotates from a first position to a second position in conjunction with the side clutch linking mechanism automatically disengaging either the left or right side clutch. The disengagement operating tool is the front wheel steering mechanism by rotating the linkage release member from the second position to the first position when the linkage release member is operated in a state of being rotated to the second position. The steering angle detection mechanism is characterized by comprising a rotation angle detection sensor that detects the steering angle of the front wheel based on the change in the rotation angle of the linkage release member. And.
The invention according to claim 2 is the passenger transplant machine according to claim 1, further comprising a transmission case for shifting the power of the prime mover, and the rotation angle detection sensor is located behind the transmission case in a side view. It is characterized by being arranged.
The invention according to claim 3 is the passenger transplant machine according to claim 1 or 2, wherein the transmission case for shifting the power of the prime mover and the main frame for connecting the transmission case and the rear axle case are provided. The rotation angle detection sensor is characterized in that it is arranged in a space surrounded by the main frame in a plan view.
The invention of claim 4 is the passenger transplanter according to any one of claims 1 to 3, further comprising a connecting rod for connecting the side clutch linking mechanism and the linking release member, and the connecting rod. The feature is that the length of the rod can be adjusted.

According to the first aspect of the present invention, the steering angle detection mechanism detects the steering angle of the front wheels by using the side clutch linkage release operation mechanism, so that the steering angle of the front wheels can be detected with the minimum component configuration, and the cost. You can go down. Further, since the linkage release member of the side clutch linkage release operation mechanism is interlocked with the steering of either the left or right front wheel, it is possible to detect the steering angle of the front wheel with one rotation angle detection sensor.
Further, according to the second aspect of the present invention, since the rotation angle detection sensor is arranged behind the transmission case in the side view, it suppresses the adhesion of mud from the wheels jumping up and the adhesion of mud in Fukada work. can do.
Further, according to the third aspect of the present invention, since the rotation angle detection sensor is arranged in the space surrounded by the main frame in a plan view, the adhesion of mud from the wheels jumping up and the adhesion of mud in Fukada work Can be further suppressed.
Further, according to the invention of claim 4, since the connecting rod for connecting the side clutch linking mechanism and the linking release member is provided and the length of the connecting rod can be adjusted, the steering detected by the rotation angle detection sensor is provided. The operation timing of the device that operates according to the angle and the detection angle of the rotation angle detection sensor can be easily adjusted.

It is an overall side view of the passenger rice transplanter which concerns on one Embodiment of this invention. It is a side view which shows the side clutch linkage mechanism and the side clutch linkage release operation mechanism. It is an enlarged side view which shows the side clutch linkage mechanism and the side clutch linkage release operation mechanism. It is a top view which shows the side clutch linkage mechanism and the side clutch linkage release operation mechanism. It is an enlarged plan view which shows the side clutch linkage mechanism and the side clutch linkage release operation mechanism. It is a rear view which shows the side clutch linkage mechanism and the side clutch linkage release operation mechanism. It is an enlarged rear view which shows the side clutch linkage mechanism and the side clutch linkage release operation mechanism. It is sectional drawing of the main part which shows the side clutch. It is a perspective view which looked at the side clutch linkage mechanism, the side clutch linkage release operation mechanism, and the steering angle detection mechanism from above. It is a perspective view which looked at the side clutch linkage mechanism, the side clutch linkage release operation mechanism, and the steering angle detection mechanism from below. It is a main part plan view of the passenger rice transplanter which shows the side clutch linkage mechanism, the side clutch linkage release operation mechanism, and the steering angle detection mechanism. It is a side view of the main part of the passenger rice transplanter which shows the side clutch linkage mechanism, the side clutch linkage release operation mechanism, and the steering angle detection mechanism.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a traveling machine of a passenger rice transplanter P (passenger transplanter), and a planting portion 3 is connected to the rear portion of the traveling machine 1 via an elevating link mechanism 2. The traveling machine body 1 itself includes an engine 4 mounted on the front part of the machine body, a transmission case 5 for shifting the power of the engine 4, front wheels 7 provided on both left and right sides of the transmission case 5 via a front axle case 6, and a rear axle case. The rear wheels 9 and the like provided on both the left and right sides of the 8 are provided.

The power transmitted by the transmission case 5 is transmitted to the left and right front wheels 7 via the front axle case 6, and is transmitted to the left and right rear wheels 9 via the rear axle case 8, and further to the planting portion 3. Is also transmitted. Inside the rear axle case 8, left and right rear wheel power transmission paths are configured in which the power input from the transmission case 5 is branched and transmitted to the left and right rear wheels 9, respectively. A side clutch 10 (see FIG. 8) is interposed in each of the left and right rear wheel power transmission paths, and the power transmission to the left and right rear wheels 9 is individually turned on and off based on the on / off operation thereof.

As shown in FIG. 8, the side clutch 10 of the present embodiment is a wet multi-plate clutch, and has an inner cylinder member 12 spline-fitted to the upstream transmission shaft 11 and a retaining ring provided on the outer periphery of the inner cylinder member 12. 13 and a plurality of disks 14, an outer cylinder member 16 integrally coupled to a downstream transmission shaft 15, a retaining ring 17 and a plurality of disks 18 provided on the inner circumference of the outer cylinder member 16, and an inner cylinder member 12 A spring 19 that is interposed between the outer cylinder member 16 and urges the inner cylinder member 12 in the separating direction, and a shifter shaft 20 that extends downward from one end position of the inner cylinder member 12 and protrudes to the outside of the case. It is configured to include an operation arm 21 extending from the lower end of the shifter shaft 20 toward the outside of the machine body.

The disks 14 and 18 are alternately polymerized between the retaining rings 13 and 17, and are always compressed by the urging force of the spring 19. As a result, the inner cylinder member 12 and the outer cylinder member 16 rotate integrally due to the frictional force between the disks 14 and 18, and the rotation of the upstream side transmission shaft 11 is transmitted to the downstream side transmission shaft 15. On the other hand, when the operation arm 21 is pulled forward, the shifter shaft 20 pushes the inner cylinder member 12 against the spring 19. As a result, slippage occurs between the disks 14 and 18, and power transmission from the upstream transmission shaft 11 to the downstream transmission shaft 15 is cut off.

The left and right front wheels 7 are steerably provided on the front axle case 6 and are steered according to the operation of the steering handle 22. The front wheel steering mechanism 23 that steers the front wheels 7 has a steering shaft 24 that rotates in response to an operation of the steering handle 22, a pitman arm 25 that is integrally provided on the steering shaft 24, and a pitman arm 25 on the left and right front wheels 7. It is configured to include a pair of left and right rods 26 to be connected.

The traveling machine body 1 mechanically links the front wheel steering mechanism 23 and the left and right side clutches 10 (operation arms 21), and automatically disengages the left and right side clutches 10 inside the turning according to the turning operation of the steering handle 22. A pair of side clutch linkage mechanisms 27 are provided. As shown in FIGS. 2 to 7, the side clutch linking mechanism 27 has a front half portion 27a in which the front end portion is connected to the front wheel steering mechanism 23, a second half portion 27b in which the rear end portion is connected to the operation arm 21, and the first half. It is configured to include an intermediate connecting portion 27c that connects the portion 27a and the latter half portion 27b.

An interlocking plate 28 extending in the left-right direction is integrally provided at the lower end of the steering shaft 24, and an arcuate elongated hole 28a centered on the steering shaft 24 is formed at both left and right ends thereof. ing. The front half portion 27a of the side clutch linking mechanism 27 is composed of a first connecting rod 29 facing in the front-rear direction, and a pin 29a loosely fitted in the elongated hole 28a of the interlocking plate 28 is provided at the front end portion thereof. .. That is, when the steering handle 22 is turned left, the first connecting rod 29 on the left side is pushed backward, and when the steering handle 22 is turned right, the first connecting rod 29 on the right side is pushed backward.

The latter half portion 27b of the side clutch linking mechanism 27 is composed of a second connecting rod 30 facing in the front-rear direction, and the rear end portion thereof is connected to the operation arm 21 of the side clutch 10 via a pin 30a.

The intermediate connecting portion 27c is composed of a link mechanism, for example, an intermediate link 31 along the left-right direction. The intermediate link 31 is configured to rotate back and forth around a rotation shaft 31a extending in the vertical direction, and is connected to the rear end of the first connecting rod 29 inside the machine body with respect to the rotation shaft 31a. At the same time, it is connected to the front end portion of the second connecting rod 30 on the outside of the machine body from the rotating shaft 31a.

That is, when the first connecting rod 29 on the left side is pushed backward in response to the left turning operation of the steering handle 22, the intermediate link 31 on the left side rotates and the second connecting rod 30 on the left side is pulled forward. , The operation arm 21 of the left side clutch 10 is pulled, and the power transmission to the left rear wheel 9 is cut off. Further, when the first connecting rod 29 on the right side is pushed backward in response to the right turning operation of the steering handle 22, the intermediate link 31 on the right side rotates and the second connecting rod 30 on the right side is pulled forward. As a result, the operation arm 21 of the right side clutch 10 is pulled, and the power transmission to the right rear wheel 9 is cut off.

Next, the side clutch linkage release operation mechanism 32 for releasing the linkage between the front wheel steering mechanism 23 and the left and right side clutches 10 will be described with reference to FIGS. 2 to 12. The side clutch linkage release operation mechanism 32 is operated when the side clutch 10 is disengaged due to steering interlocking and when traveling becomes impossible due to insufficient driving force, and the steering interlocking of the side clutch 10 is released in response to this operation. It is configured in. Specifically, a pedal 33 (linkage release operation tool) that is stepped on when the linkage is released, and a side view inverted L-shaped release arm 34 (linkage release member) that rotates in response to the depression operation of the release pedal 33. A pair of left and right release rods 35 (connecting rods) that are pulled forward by the release arm 34 when the release pedal is depressed are provided, and the rear end portion of the left side release rod 35 is the inner end of the left side intermediate link 31. The rear end portion of the right side release rod 35 is connected to the inner end portion of the right side intermediate link 31.

That is, when the release pedal 33 is depressed while the left or right intermediate link 31 is rotated in response to the turning operation of the steering handle 22, the release rod 35 is pulled forward via the release arm 34, and the intermediate link is pulled forward. 31 is returned to the clutch engaging side. As a result, the steering linkage operation of the side clutch 10 can be temporarily released. In addition, it is assumed that a flexible means for allowing the movement of the intermediate link 31 at the time of the steering linkage release operation is provided between the intermediate link 31 and the first connecting rod 29.

Specifically, as shown in FIGS. 9 and 10, the release arm 34 has a tubular portion 34a that rotatably fits on a support shaft 36 along the left-right direction, and a tubular portion 34a rearward and rearward from one end side of the tubular portion 34a. Between the side view inverted L-shaped first arm portion 34b extending downward, the second arm portion 34c extending downward from the other end side of the tubular portion 34a, and the lower ends of both arm portions 34b, 34c. It includes a shaft-shaped erection portion 34d that is rotatably erected, and a third arm portion 34e that extends upward from the intermediate portion of the tubular portion 34a. A release pedal 33 is connected to the rear end of the first arm portion 34b, a pair of left and right release rods 35 are connected to the erection portion 34d, and a return spring 37 is connected to the third arm 34e. ..

The pair of left and right release rods 35 connect the through bolt 38 having the head portion 38a, the shaft portion 38b, and the screw portion 38c, the side view U-shaped connecting plate 39, and the through bolt 38 and the connecting plate 39, respectively. It is configured to include a pair of nuts 40. The through bolt 38 is slidably inserted from the front into a pair of left and right insertion holes 34f formed in the erection portion 34d of the release arm 34, and the head 38a is engaged with the erection portion 34d from the front. The open end of the connecting plate 39 is rotatably connected to the intermediate link 31 via a pin 41, while the threaded portion 38c of the through bolt 38 is inserted through the other end of the connecting plate 39. , Fixed via a pair of nuts 40. At this time, the length of the release rod 35 can be adjusted by changing the fixing position of the through bolt 38 by the pair of nuts 40.

According to such a side clutch interlocking release operation mechanism 32, when the side clutch interlocking mechanism 27 automatically disengages either the left or right side clutch 10 in response to the turning operation of the steering handle 22, the left or right side clutch 10 is automatically disengaged. When either the left or right release rod 35 moves rearward in conjunction with the rotation of the link 31, the erection portion 34d of the release arm 34 engaged with the front end portion of the release rod 35 is pulled backward and the release arm 34 Rotates from the front position (first position) to the rear position (second position). At this time, the release rod 35 on either the left or right side does not hinder the rotation of the release arm 34 by relatively moving in the insertion hole 34f of the erection portion 34d. Then, when the pedal 33 is depressed while the release arm 34 is rotating to the rear position, the release rod 35 is pulled forward as the release arm 34 rotates from the rear position to the front position, and is intermediate. The link 31 is returned to the side where the clutch is engaged. As a result, the steering linkage operation of the side clutch 10 is temporarily released.

Next, the steering angle detecting mechanism 50 for detecting the steering angle of the front wheel 7 (the turning angle of the steering handle 22) will be described with reference to FIGS. 9 to 12. The steering angle detection mechanism 50 is configured to detect the steering angle of the front wheels 7 by using the side clutch linkage release operation mechanism 32, and specifically, it rotates according to the turning operation of the steering handle 22. A rotation angle detection sensor 51 that detects the rotation angle of the front wheel 7 based on the change in the rotation angle of the release arm 34 is provided. According to such a steering angle detecting mechanism 50, by detecting the steering angle of the front wheel 7 by using the side clutch linkage release operation mechanism 32, the steering angle of the front wheel 7 can be detected with the minimum component configuration. Cost can be reduced. Further, since the release arm 34 of the side clutch linkage release operation mechanism 32 is interlocked with either the left or right turning operation of the steering handle 22, it is possible to detect the steering angle of the front wheel 7 with one rotation angle detection sensor 51. become.

Specifically, the steering angle detection mechanism 50 releases the potentiometer constituting the rotation angle detection sensor 51, the bracket 52 supporting the rotation angle detection sensor 51, and the detection shaft 51a of the rotation angle detection sensor 51. A detection lever 53 connected to a fourth arm portion 34g extending rearward from the tubular portion 34a of the arm 34 is provided. When the release arm 34 rotates in response to a turning operation on either the left or right side of the steering handle 22, the detection shaft 51a of the rotation angle detection sensor 51 is rotated via the fourth arm portion 34g and the detection lever 53. This makes it possible to detect the steering angle of the front wheel 7 by using the side clutch linkage release operation mechanism 32.

Further, the side clutch linkage release operation mechanism 32 of the present embodiment includes a release rod 35 that connects the intermediate link 31 of the side clutch linkage mechanism 27 and the release arm 34, and the length of the release rod 35 can be adjusted. It is possible to easily adjust the operation timing of the device that operates according to the steering angle detected by the moving angle detection sensor 51 and the detection angle of the rotation angle detection sensor 51.

Further, the rotation angle detection sensor 51 is attached to the main frame 54 via the bracket 52. The main frame 54 is a pair of left and right frame members along the front-rear direction that connects the transmission case 5 and the rear axle case 8, and the rotation angle is detected on the inner side of either the left or right main frame 54 via the bracket 52. The sensor 51 is attached. The rotation angle detection sensor 51 attached in this way is not only arranged in the space surrounded by the main frame 54 in the plan view, but also arranged behind the transmission case 5 in the plan view and the side view, so that the front wheels are arranged. It is possible to suppress the adhesion of mud that 7 jumps up and the adhesion of mud in Fukada work.

According to the present embodiment configured as described above, the front wheel steering mechanism 23 that steers the left and right front wheels 7 in response to the operation of the steering handle 22 and the rear axle case 8 are installed to transmit power to the left and right rear wheels 9. The left and right side clutches 10 that individually turn on and off, the front wheel steering mechanism 23, and the left and right side clutches 10 are mechanically linked, and the side clutch 10 on the inside of the turn is automatically disengaged according to the turning operation of the steering handle 22. The side clutch interlocking mechanism 27 for causing the front wheel to be engaged, and the side clutch interlocking mechanism for releasing the interlocking between the front wheel steering mechanism 23 and the left and right side clutches 10 in response to the operation of the pedal 33 in a state where the side clutch 10 on the inner side of turning is automatically disengaged. A passenger field planting machine P including a release operation mechanism 32 and a steering angle detection mechanism 50 for detecting the steering angle of the front wheel 7. In the side clutch linkage release operation mechanism 32, the side clutch linkage mechanism 27 is either left or right. A release arm 34 that rotates from the front position to the rear position in conjunction with the automatic disengagement of the side clutch 10 is provided, and the pedal 33 is operated in a state where the release arm 34 is rotated to the rear position. When the release arm 34 is rotated from the rear position to the front position, the front wheel steering mechanism 23 and the left and right side clutches 10 are released from each other, and the steering angle detection mechanism 50 changes the rotation angle of the release arm 34. Since the rotation angle detection sensor 51 that detects the steering angle of the front wheel 7 is provided based on the above, it becomes possible to detect the steering angle of the front wheel 7 by using the side clutch linkage release operation mechanism 32, and as a result, the minimum amount. The steering angle of the front wheel 7 can be detected by the component configuration of the above, and the cost can be reduced.

Further, since the release arm 34 of the side clutch linkage release operation mechanism 32 is interlocked with the steering of either the left or right front wheel, it becomes possible to detect the steering angle of the front wheel 7 with one rotation angle detection sensor 51.

Further, the passenger rice transplanter P includes a transmission case 5 for shifting the power of the engine 4, and the rotation angle detection sensor 51 is arranged at least behind the transmission case 5 in a side view, so that the front wheels 7 jump up. It is possible to suppress the adhesion of mud and the adhesion of mud in Fukada work.

Further, since the passenger rice transplanter P includes a main frame 54 that connects the transmission case 5 and the rear axle case 8, the rotation angle detection sensor 51 is arranged in a space surrounded by the main frame 54 in a plan view. It is possible to further suppress the adhesion of mud that the front wheel 7 jumps up and the adhesion of mud in the Fukada work.

Further, the side clutch linkage release operation mechanism 32 includes a release rod 35 that connects the side clutch linkage mechanism 27 and the release arm 34, and the length of the release rod 35 can be adjusted, so that the rotation angle detection sensor 51 The operation timing of the device that operates according to the steering angle detected by the above and the detection angle of the rotation angle detection sensor 51 can be easily adjusted.

P Passenger field planting machine 1 Traveling machine 4 Engine 5 Transmission case 7 Front wheel 8 Rear axle case 10 Side clutch 22 Steering handle 23 Front wheel steering mechanism 27 Side clutch linkage mechanism 31 Intermediate link 32 Side clutch linkage release operation mechanism 33 Pedal 34 Release arm 35 Release rod 50 Steering angle detection mechanism 51 Rotation angle detection sensor 54 Main frame

Claims (4)

A front wheel steering mechanism that steers the left and right front wheels according to the operation of the steering wheel,
The left and right side clutches, which are installed in the rear axle case and individually switch power transmission to the left and right rear wheels,
A side clutch linking mechanism that mechanically links the front wheel steering mechanism and the left and right side clutches to automatically disengage the side clutch inside the turning according to the turning operation of the steering handle.
A side clutch linkage release operation mechanism that releases the linkage between the front wheel steering mechanism and the left and right side clutches in response to an operation of the linkage release operation tool in a state where the side clutch on the inside of the turn is automatically disengaged.
A passenger porting machine including a steering angle detecting mechanism for detecting the steering angle of the front wheels.
The side clutch linkage release operation mechanism is a linkage release member that rotates from a first position to a second position in conjunction with the side clutch linkage mechanism automatically disengaging the left or right side clutch. Equipped with
The front wheel is operated by rotating the linkage release member from the second position to the first position when the linkage release operation tool is operated in a state where the linkage release member is rotated to the second position. The linkage between the steering mechanism and the left and right side clutches is released,
The steering angle detection mechanism is a passenger transplant machine including a rotation angle detection sensor that detects a steering angle of the front wheel based on a change in the rotation angle of the linkage release member. Equipped with a transmission case that shifts the power of the prime mover
The passenger transplant machine according to claim 1, wherein the rotation angle detection sensor is arranged behind the transmission case in a side view. A transmission case that shifts the power of the prime mover,
A main frame for connecting the transmission case and the rear axle case is provided.
The passenger transplanter according to claim 1 or 2, wherein the rotation angle detection sensor is arranged in a space surrounded by the main frame in a plan view. The passenger transplant according to any one of claims 1 to 3, further comprising a connecting rod for connecting the side clutch linking mechanism and the linking release member, and the length of the connecting rod can be adjusted. Machine.

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