JPH0948257A - Farm working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an operator to easily push to operate a finger clutch lever with a hand holding a handle and to operate a main clutch lever without making handle operation unstable and moreover to shift a clutch without directly operating the finger clutch lever and main clutch lever at the time of emergency. SOLUTION: A right handle 19 is provided with a finger clutch lever 3 for changing on/off with every finger push operation of the lever, and a left handle 18 is provided with a main clutch lever 4 for changing on/off with lever angle change operation. The finger clutch lever 3 and the main clutch lever 4 are interlockingly connected by an interlocking body 5 laid across laterally.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural working machine such as a walking type management machine having a steering handle provided with a finger clutch lever and a main clutch lever.

[0002]

2. Description of the Related Art Conventionally, as this type of agricultural working machine, for example, as shown in JP-A-6-344787 and as shown in FIG. 13, a right handle A held by the right hand and a left handle B held by the left hand are provided. A finger clutch lever C and a main clutch lever D are provided in parallel on one of the right handle A and the left handle B. Then, during the agricultural work in which the right handle A and the left handle B are gripped by both hands, if the on / off of the main clutch can be switched by the fingers of the hands gripping the handles, the right handle A and the left handle B are switched. In the gripped state, for example, the thumb holding the one-sided handle provided with the finger clutch lever C and the main clutch lever D is extended to the finger clutch lever C side and the finger clutch lever C is pushed. When it is difficult to switch the main clutch on and off with only the finger holding the handle, it is difficult to switch the main clutch on and off with the fingers of the hand holding the handle. The hand holding one of the handles provided with the finger clutch lever C and the main clutch lever D is released, and the main clutch lever D is operated with this released hand.

[0003]

However, in the case where the finger clutch lever C and the main clutch lever D are provided on the right handle A as shown in FIG. 13, the fingers of the right hand holding the right handle A are used. Since the clutch lever C can be pushed and operated, the finger clutch lever C can be relatively easily operated by the strong force of the right hand, which is generally the dominant arm. However, when the main clutch lever D is operated, the right hand is operated by the right handle A. Since it is separated from the steering wheel, there is a problem in that the handle operation during agricultural work tends to be unstable. On the other hand, although not shown, when the finger clutch lever C and the main clutch lever D are provided on the left handle B, the left hand is released while the right handle A is held by the right hand, and the left hand holds the main clutch. Since the lever D can be operated, the clutch can be switched without causing the steering wheel operation to become unstable during agricultural work, but on the other hand, the finger clutch lever C is operated by pushing with the finger of the left hand holding the left handle B. Therefore, it is difficult to push the finger clutch lever C, and even if the finger clutch lever C can be operated, switching of the main clutch is delayed.

According to the present invention, the finger clutch lever can be easily pushed and operated by the fingers of the hand holding the handle, and the main clutch lever can be operated without destabilizing the handle operation during agricultural work. It is a main object of the present invention to provide an agricultural work machine capable of switching the clutch without directly operating the finger clutch lever and the main clutch lever in an emergency.

[0005]

In order to achieve the above object, therefore, as clearly shown in FIG. 1, a right handle 19 held by the right hand and a left handle 18 held by the left hand are provided,
The right handle 19 is provided with a finger clutch lever 3 whose clutch is switched on and off each time the lever is pushed, and a left handle 18 is provided.
The main clutch levers 4 that switch between on and off of the clutch by the operation of changing the lever angle are provided respectively, and the finger clutch lever 3 and the main clutch lever 4 are interlocked and coupled by the interlocking body 5 that bridges left and right.

[0006]

Since the finger clutch lever 3 is provided on the right handle 19 and the main clutch lever 4 is provided on the left handle 18, the finger clutch lever 3 is easily pushed by the finger of the right hand holding the right handle 19. In addition, since the left hand can be released from the left handle 18 and the main clutch lever 4 can be operated while the right handle 19 is being held by the right hand, the handle operation during farming does not become unstable. The clutch can be switched, and further, in an emergency, the clutch can be switched by the interlocking body 5 which is bridged to the left and right without directly operating the finger clutch lever 3 and the main clutch lever 4. Can be improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The agricultural working machine according to the embodiment shown in FIGS. 1 and 12 has an engine 11 mounted on the upper front part of the machine body 10 and has a drive shaft of the engine 11 mounted on the rear side of the machine body 10. A mission case 12 having a main shaft that interlocks via a clutch is provided, and an axle 13 is provided below the mission case 12 via a power transmission mechanism that interlocks with the rotation of the main shaft. 14 and a hitch 15 for a working machine such as a rotary device is provided at the rear end of the machine body 1, while a handle mount 16 is provided on the upper side of the mission case 12, and the handle mount 16 is provided at the rear side. A handle support 17 extending obliquely upward toward the left side is branched into left and right sides, and supports a right handle 18 held by the right hand and a left handle 19 held by the left hand.

The left and right handles 18, 19 are provided with grips 18a, 19a at their rear ends, and a rotary clutch lever 22 for the working machine is provided at an intermediate part of the left handle 18. In addition, the transmission case 12 supports a traveling shift lever 23,
It is possible to change gears between three stages of forward movement and one stage of reverse movement.

The right handle 19 of the agricultural work machine constructed as described above is provided with the finger clutch lever 3 for switching between ON and OFF of the main clutch each time the lever is pushed.
The left handle 18 is provided with a main clutch lever 4 for switching between ON and OFF of the main clutch by changing the lever angle, and the finger clutch lever 3 and the main clutch lever 4 are interlocked by an interlocking body 5 that bridges left and right. In a state where the finger clutch lever 3 can be pushed and operated by the finger of the right hand which is connected and grips the right handle 19, and the right handle 19 is gripped by the right hand,
By releasing the left hand from the left handle 18 and operating the main clutch lever 4 with this left hand, the finger clutch lever 3 and the main clutch lever 4 are operated by operating the interlocking member 5, and the main clutch lever 4 is operated via the operation wire 6. The clutch can be switched.

The finger clutch lever 3 of the embodiment shown in FIGS. 2 to 4 includes a finger lever body 30 that is swingably supported by a bracket 7 fixed to a right handle 19 via a lever shaft 71, and the finger clutch lever 3 is also the same as that described above. The reversing body 31 that is swingably supported by the bracket 7 via the horizontal shaft 72, the wire receiving body 32 pivotally supported by the reversing body 31, and the operation force of the finger lever body 30 are transmitted to the reversing body 31. And a control body 33.

The finger lever body 30 includes the lever shaft 71.
Extending in the front-rear direction from a cylindrical boss portion 30a pivotally supported on the rear end, an operation portion 30b is provided on the rear end side, and a transmission groove portion 30 on the front end side.
c and a control surface 30d that is continuous with the transmission groove portion 30c, and a return spring 34 that constantly urges the finger lever body 30 in the returning direction is interposed between the spring bearing 73 protruding from the bracket 7. are doing.

The reversing body 31 includes an arm piece 31b projecting radially outward from a cylindrical portion 31a fitted to the horizontal shaft 72 in a freely rotatable manner, and a pair of stoppers provided on the bracket 7. The arm piece 31b is provided with a restricting piece 31c that abuts against 74 and 75 to determine the reversing position of the reversing body 31, and one end of the wire receiving body 32 having a substantially U-shape is attached to the arm piece 31b.
And the operation wire 6 of the main clutch is connected to the other end of the wire receiver 32. The operation wire 6 is inserted into the outer cylinder 6a supported by an outer receiver 76 fixed to the front side of the bracket 7 and the wire receiver 32 and the main clutch. The inner wire 6b is connected to the inner wire 6b.

Further, the control body 33 is composed of a plate body having a cylindrical portion rotatably fitted to the distal end portion of the horizontal shaft 72, and the plate portion has a roller engaged with the transmission groove portion 30c. 33a, a pair of contact surfaces 33b and 33c that engages with the restriction piece 31c to rotate the reversing body 31, and the rotation stopping surface 3
3d and a spring bearing 33e are provided, and this spring bearing 33e
An unstable switching spring 36 for urging the reversing body 31 to one side in the swinging direction is interposed between and the regulating piece 31c.

On the other hand, the main clutch lever 4 of the embodiment shown in FIGS. 2 and 10 is attached to a lever shaft 81 which is rotatably supported by a bracket 8 fixed to the left handle 18, and is attached to the bracket 8. A pair of protruding stoppers 8
It is possible to swing in the range between 2 and 83. The main clutch lever 4 may be rotatably supported on a lever shaft 81 attached to a bracket 8, and the interlocking body 5 may be connected to the main clutch lever 4.

Further, the interlocking body 5 is, as shown in FIG.
The interlocking body 5 is formed integrally with the lever shaft 81, and the other end of the interlocking body 5 is attached to the tubular portion 31a of the reversing body 31. The main clutch lever 4 and the finger clutch lever 3 are interlockingly connected via the reversing body 31 and the control body 33.
When the finger clutch lever 3 and the main clutch lever 4 are in the on position, the interlocking body 5 has its intermediate portion 5a directed rearward as shown in FIGS.
By pushing a from the on position of FIG. 12 to the lower side and reversing it to the disengaged position, the finger clutch lever 3 and the main clutch lever 4 are operated to the disengaged position so that the main clutch can be disengaged. ing.

In FIG. 1, 77 and 84 are lever covers attached to the left and right handles 18 and 19.

Next, the operation of the above configuration will be described.

First, an operation procedure for operating the finger clutch lever 3 to switch the main clutch from the disengaged position to the engaged position will be described with reference to FIGS.

FIG. 3 shows the operating portion 30 of the finger lever body 30.
b is in the initial position where it is locked in the stopper groove 7a of the bracket 7 by the biasing force of the return spring 34, and the reversing body 31 is caused by the biasing force of the unstable switching spring 36 and the operating wire 6. It is brought into contact with the first stopper 74 by the pulling force, the wire receiver 32 is held in the disengaged position, and the main clutch is maintained in the disengaged state. On the other hand, the control body 33 controls the unstable switching spring 3
The first contact surface 33b is brought into contact with the restricting piece 31c of the reversing body 31 by 6 to prevent the control body 33 from rotating more than necessary, and the roller of the control body 33 at this time. 33a is a transmission groove portion 30c of the finger lever body 30.
The main clutch lever 4 is inserted into the inside of the transmission groove portion 30c and is in contact with the opening side lower end edge portion of the transmission groove portion 30c.
As shown in FIG. 5, the first stopper 82 is brought into contact with the first stopper 82 and stopped at the insertion position.

Then, the grip portion 18 of the left handle 18
Grip a with the left hand, and grip portion 19a of the right handle 19
From the state in which the right hand is grasped, for example, the thumb of the right hand is extended to the operation portion 30b side of the finger lever body 30 and the operation portion 30b is extended.
5 is pressed downward, the finger lever body 30 is rotated clockwise around the lever shaft 71, and the transmission groove portion 30c of the finger lever body 30 moves the roller 33a upward as shown in FIG. By pushing up, the control body 33 is rotated in the counterclockwise direction about the horizontal shaft 72, and accordingly, the first contact surface 33b provided on the control body 33 becomes the restricting piece 31c of the reversing body 31. Abutting this inverted body 3
1 is inverted from the disengaged position to the engaged position side, and the operation wire 6 is pulled in the direction of the chain line arrow in FIG. 5 by the wire receiving body 32 connected to the arm piece 31b of the reversing body 31 to engage the main clutch. Be operated. At this time, the main clutch lever 4 swings counterclockwise in FIG. 10 in conjunction with the reversing body 31, contacts the second stopper 83 as shown in FIG. 11, and stops at the off position. Further, the connecting portion between the restricting piece 31c of the reversing body 31 and the wire receiving body 32 is on an extension line in the pulling direction of the operation wire 6 as shown in FIG.
2, the restricting piece 31c of the reversing body 31 is brought into contact with the second stopper 75 by the pulling force of the operating wire 6 in the direction of the solid line arrow in FIG. Held in. By doing so, various works are performed by the working machine connected to the machine body 1.

After that, by releasing the finger from the operating portion 30b of the finger lever body 30 at the position shown in FIG. 5, as shown in FIG.
The finger lever body 30 is rotated counterclockwise around the lever shaft 71 by the urging force of the return spring 34, locked in the stopper groove 7a of the bracket 7 and returned to the initial position described above. . At this time, the roller 3 of the control body 33
3a is pushed downward and the control body 33 is rotated in the clockwise direction. Further, the control body 33 is rotated between the regulating piece 31c of the reversing body 31 and the spring bearing 33e of the control body 33. The stable switching spring 36 is provided on the lever shaft 71.
By virtue of the fact that the fulcrum is exceeded, the control body 33 causes the roller 33a to move in the finger lever body 30 via the unstable switching spring 36 as shown in FIG. The second contact surface 33c provided on the control body 33 is brought into contact with the regulation piece 31c by being rotated in a direction to be detached outward from the transmission groove portion 30c, and the detent surface 33d is provided with the second stop surface 33d. It is positioned so as to face the stopper 75. Further, at this time, the unstable switching spring 36 goes beyond the fulcrum with respect to the horizontal shaft 72, and the second contact surface 33c of the control body 33 is brought into contact with the regulation piece 31c, whereby the roller 33a is detached outward from the transmission groove portion 30c of the finger lever body 30,
In addition, the roller 33a is held in contact with the control surface 30d that is continuously formed below the opening of the transmission groove portion 30c.

When the main clutch is disengaged from the above main clutch engaged state, the same operation as the main clutch engagement operation is performed.
By extending the thumb of the right hand holding the grip portion 19a of the right handle 19 to the operation portion 30b side of the finger lever body 30 and pressing the operation portion 30b, the finger lever body 30 moves the lever shaft 30 as shown in FIG. The roller 33a is rotated clockwise about 71 to be pushed by the control surface 30d, and accordingly, the control body 33 is pushed through the roller 33a.
However, the rotation stopping surface 33d is rotated clockwise about the horizontal shaft 72 within a range until the rotation stopping surface 33d contacts the second stopper 75, and the second contact surface 33c of the control body 33 moves the contact position to the insertion position. The restriction piece 31c of the reversing body 31 is pushed to rotate the reversing body 31 to the cut position side (clockwise direction),
At the same time, the main clutch lever 4 rotates in the clockwise direction in FIG. 11 via the interlocking body 5. At this time, since the rotation stopping surface 33d of the control body 33 contacts the second stopper 75, the control body 33 cannot be further rotated.
The connecting portion between the arm piece 31b and the wire receiving body 32 is located below the horizontal shaft 72, and the operation wire 6 is beyond the fulcrum with respect to the horizontal shaft 72. In FIG. 9, the reversal body 31 is reversed to the disengaged position by the pulling force in the direction of the solid arrow, and at the same time, the main clutch lever 4 is reversed to the disengaged position via the interlocking body 5 to contact the first stopper 82. The reversing body 31 is brought into contact with the first stopper 74, the reversing body 31 and the wire receiving body 32 are held in the disengaged position, and the main clutch is maintained in the disengaged state.

At this time, the unstable switching spring 36 is also used.
Goes beyond the fulcrum with respect to the horizontal axis 72 as shown in FIG. 9, so that the control body 33 tends to rotate counterclockwise. Then, when the thumb of the right hand is released from the operation portion 30b of the finger lever body 30, the finger lever body 30 is returned to the original position by the return spring 34, and the roller 33a of the control body 33 is set to the above-mentioned position. By the biasing force of the stable switching spring 36, it is inserted into the transmission groove portion 30c of the finger lever body 30 and returned to the initial state of the main clutch disengagement shown in FIG.

When the main clutch lever 4 is operated to switch the main clutch from the disengaged position to the engaged position, the right handle 19 is held by the right hand and the left handle 18 is held by the left hand. The main clutch lever 4 shown in FIG. 10 is rotated to the entry position side (counterclockwise direction) by separating from the left handle 18 and using this left hand. At this time, the wire receiver 32 connected to the reversing body 31 of the finger clutch lever 3 and the arm piece 31b of the reversing body 31 in conjunction with the main clutch lever 4.
Turns from the disengaged position in FIG. 3 to the engaged position in FIG. 5, and the main clutch is engaged. Further, at this time, as shown in FIG. 6 through FIG. 5, the urging direction of the unstable switching spring 36 is reversed, and the reversing body 31, the wire receiving body 32, and the main clutch lever 4 are held in the engaged position. .

When the main clutch lever 4 is operated to switch the main clutch from the engaged position to the disengaged position, similarly, the left hand is separated from the left handle 18, and the left hand is used to move the FIG.
The main clutch lever 4 is rotated to the disengaged position side (clockwise direction). At this time, the reversing body 31 of the finger clutch lever 3 and the wire receiving body 32 connected to the arm piece 31b of the reversing body 31 interlocked with the main clutch lever 4 are reversed from the insertion position of FIG. 6 to the cutting position of FIG. , The main clutch is disengaged. At this time, as shown in FIG. 3, the biasing direction of the unstable switching spring 36 is reversed, and the reversing body 31, the wire receiving body 32, and the main clutch lever 4 are held in the disengaged position.

Further, when various agricultural works are performed with the main clutch engaged, for example, when an emergency occurs due to sudden dashing of the machine body 10, the machine body 10 is bridged to the left and right. When the intermediate portion 5a of the interlocking body 5 is pushed downward, the main clutch can be disengaged. That is, similarly to the case where the main clutch lever 4 is moved from the on position to the off position, the wire receiving body 32 connected to the reversing body 31 of the finger clutch lever 3 and the arm piece 31b of the reversing body 31 is interlocked with the interlocking body 5. Is reversed from the engaged position of FIG. 6 to the disengaged position of FIG. 3, and the main clutch is disengaged. Further, since the intermediate portion 5a of the interlocking body 5 is directed obliquely downward with respect to the horizontal position in the clutch engaged state as shown in FIG. 12, the machine body 10 suddenly moves rearward so that the operator can move the interlocking body 5a. When it is sandwiched between the object and the object, the interlocking body 5 is automatically pushed downward by the sandwiched operator, and the main clutch can be disengaged.

In the finger clutch lever 3 of the above-described embodiment, the control body 33 is operated by pushing one lever body 30.
Although the reversal body 31 is reversed between the cut position and the insertion position via the, the other two finger lever bodies biased toward the initial position are used, and one of the finger lever bodies is pushed to perform the operation described above. Invert the reversal body 31 to one side of the cutting position and the entering position,
The inversion body may be inverted to the other side by pushing the other finger lever body. In addition, the finger lever body 30
In addition to being swingable about the horizontal lever shaft, it may be swingable about the vertical lever shaft.

Further, although the interlocking body 5 made of a rod is used in the above-mentioned embodiments, the interlocking body 5 may also use an operating wire made of an inner wire and an outer tube for guiding the inner wire. Good. In this case, for example, the end portion of the operation wire is connected to the wire receiving piece extending radially outward from the reversing body 31 and the intermediate portion of the main clutch lever 4.

[Brief description of drawings]

FIG. 1 is a plan view of the entire agricultural working machine of the present invention.

FIG. 2 is a perspective view in which a part of the finger clutch lever and a main clutch lever are omitted.

FIG. 3 is a side view of the finger clutch lever portion.

FIG. 4 is a plan view of FIG.

FIG. 5 is an operation state diagram from FIG. 3;

FIG. 6 is an operation state diagram from FIG. 5;

FIG. 7 is an operation state diagram from FIG. 6;

FIG. 8 is an operation state diagram from FIG. 7.

FIG. 9 is an operation state diagram from FIG.

FIG. 10 is a side view of the main clutch lever portion.

11 is an operation state diagram from FIG.

FIG. 12 is a side view of the entire agricultural working machine.

FIG. 13 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

 3 ... Finger clutch lever 4 ... Main clutch lever 5 ... Interlocking body 18 ... Right handle 19 ... Left handle

Claims (1)

[Claims] 1. A finger having a right handle (19) gripped by the right hand and a left handle (18) gripped by the left hand, wherein the right handle (19) switches between on and off of the clutch each time the lever is pushed. Replace the clutch lever (3) with the left handle (1
8) is provided with main clutch levers (4) for switching the clutch on / off by changing the lever angle, and the interlocking body that bridges the finger clutch lever (3) and the main clutch lever (4) left and right. An agricultural working machine characterized by being interlockingly connected in (5).