JPH10272952A - Mobile farm machine clutch operating device - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To reduce the operation force of the on-lever and improve the operability by the thumb of the hand holding the operation unit, and to prevent the body posture from swaying right and left when starting. SOLUTION: A main clutch lever 17 is connected to a main clutch via a fulcrum crossing link 28 and a clutch wire 29, and an on lever 22 is provided in parallel with an operating portion 15a of a steering handle 15 to provide the operating portion. In the clutch operating device of the mobile agricultural machine in which the on-lever 22 is operated with the thumb of the gripped hand to engage the main clutch lever 17, a rotating body 31 is attached to a shaft 30 fixed to the main clutch lever.
Lever arm 3 for attaching a rotating body 31
2 is fixed to the on-lever 22 so that the action length of the lever arm 32 from the support shaft 33 with respect to the rotating body 31 is gradually reduced during the on-operation of the on-lever 22, and the operating force of the main clutch lever is required to be maximum. The lever arm 32 is configured such that the working length of the lever arm 32 is minimized at a point when the fulcrum is exceeded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch operating device for a walking type mobile agricultural machine such as a management machine for performing various management operations.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Utility Model Unexamined Publication No. Sho 61-95284, there is a technique in which an on lever for turning on a clutch is provided near an operating portion of a steering handle.

[0003]

In the prior art, the operating force of the on lever for engaging the clutch by tensioning the clutch wire cannot be easily reduced, and the thumb of the hand holding the operating portion of the steering handle cannot be used. The on-lever cannot be easily turned on.Therefore, by releasing the handle from the steering wheel and turning on the clutch lever, the course of the aircraft changes from side to side due to the running resistance difference between the left and right wheels when starting. The steering handle easily swings to the left and right, the aircraft attitude becomes unstable at the start and moves away from the predetermined course, there is a problem that a lot of residual tillage occurs during tilling work, and there is a problem that damages crops during middle tillage work between crops There is.

[0004]

SUMMARY OF THE INVENTION In the present invention, a main clutch lever provided on a steering wheel is connected to a main clutch via a fulcrum link and a clutch wire. An on lever is provided substantially in parallel in a plan view, and in a clutch operating device of a mobile agricultural machine that operates the on lever with a thumb of a hand gripping the operating portion to engage the main clutch lever, a rotating body is fixed to a shaft fixed to the main clutch lever. The lever arm to be mounted and abutting on the rotating body is fixed to the on lever, so that the working length of the lever arm from the support shaft with respect to the rotating body is gradually reduced during the ON operation of the on lever, and the operation of the main clutch lever The lever arm's working length is minimized when the fulcrum where the maximum force is required is reached. The working length of the lever arm is reduced in proportion to the increase in the tension of the clutch wire due to the movement of the link beyond the fulcrum, and the operation of the link beyond the fulcrum over the fulcrum is performed via the lever arm of the minimum working length. , The on-lever main clutch engagement operation force can be reduced more easily than before, and the on-lever operation force can be easily reduced and the operability can be easily improved by the thumb of the hand holding the operation unit. It can be operated lightly to start this machine, and it can easily prevent the attitude of the aircraft from swinging out of the course due to swinging left and right at the time of starting, and it can easily eliminate problems such as generating residual tillage and damaging crops Things.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is an explanatory side view of a main clutch lever portion, FIG. 2 is an overall side view of a management machine, in which (1) is a chassis, (2) is an engine mounted on the chassis (1), and (3) is A transmission case in which the rear end of the chassis (1) is integrally connected; (4) an axle that is suspended below the transmission case (3); and (5) an axle (4)
(6) is a hitch before fixing the balance weight and the like by fixing to the front end of the chassis (1);
(7) is a fuel tank mounted above the engine (2), (8) is an output pulley (9) of the engine (2), an input pulley (10) of the transmission case (3) and each pulley (9). ) (10) V-belt suspended between (1)
(1) a transmission case in which the transmission case is installed; (12) a stand that is foldably mounted on the bracket (13) at the front end of the chassis (1); and (14) a handle that is supported on the upper end of the transmission case (3) so as to be horizontally rotatable. Base, (1
5) is a steering handle connected to the handle base (14), (16) is a rear hitch fixed to the middle rear of the transmission case (3), and (17) is a clutch element, that is, the V-belt (11). A main clutch lever for turning on / off a main clutch (18) which is a tension pulley of
(19) is a traveling speed change lever, and (20) is a side clutch lever. The steering handle (15) is extended forward or backward of the body, and is configured to move forward or backward to perform agricultural work.

As shown in FIG. 3, the main clutch lever (17) is provided near an operation portion (15a) which is a handle portion of the handle (15) via a lever guide plate (21). 17), an on-lever (22) and an off-lever (23) as auxiliary clutch levers are provided side by side. The main clutch lever (17) has a support shaft (24) fixedly mounted on a bracket (21a) of a lever guide plate (21) swingably supporting a base end cylinder shaft (25). ), The tip of which is fixed to the clutch arm (26) and the pin (27) and the link (2)
8) to the clutch wire (29) of the main clutch (18), and swing the main clutch lever (17) in the direction indicated by the arrow in FIG. ) Is pulled to turn on or turn on the main clutch (18).

Further, a shaft (30) is fixedly mounted on the clutch arm (26), and an on-operation rotating body (31) is fitted to the shaft (30) so as to freely rotate, and the on lever (22) is rotated. The tip of the lever arm (32), which is a one-touch member integrally connected to the rotating body (31), is provided so as to abut and lock on the rotating body (31). The on-lever (22) allows the fixed support shaft (33) of the bracket (21a) to swingably support the base end cylinder shaft (34), and also connects the base end of the lever arm (32) to the cylinder shaft (34). When the main clutch lever (17) is turned off, the lever arm (32) is brought into contact with and engaged with the rotating body (31) to maintain the off position of the on lever (32), and the on lever (32) When the lever arm (32) lifts the rotating body (31), the main clutch lever (17) is switched to the ON operation when the swinging operation is performed in the direction of the arrow in FIG. The main clutch (18) is turned on.

Reference numeral (35) denotes a stopper pin of the main clutch lever (17), which is turned off by engaging the lever (17) with the pin (35) by the pulling force of the wire (29). It is intended to hold the clutch arm (26) in contact with the pin (35) and to hold the clutch arm (26) on.

As is apparent from the above description, the main clutch lever (17) provided on the steering handle (15) is connected to the main clutch (18) via the fulcrum link (28) and the clutch wire (29). An on-lever (22) is provided substantially parallel to the plane of the operation unit (15a) of the steering handle (15) in a plan view, and the on-lever (22) is operated with the thumb of the hand gripping the operation unit (15a). In a clutch operating device of a mobile agricultural machine for engaging a clutch lever (17), a rotating body (31) is attached to a shaft (30) fixed to the main clutch lever (17), and a lever abuts against the rotating body (31). The arm (32) is fixed to the on-lever (22), and the working length (L2) of the lever arm (32) from the support shaft (33) with respect to the rotating body (31).
Are formed so as to gradually decrease during the ON operation of the ON lever (22), and the lever arm (32) is moved at a point where the operating force of the main clutch lever (17) exceeds the fulcrum at which the operating force is required maximum.
Is formed such that the operation length (L2) of the first element is minimized.
The working length (L2) of the lever arm (32) decreases in proportion to the increase in the tension of the clutch wire (29) due to the movement of the fulcrum link (28) for engaging the main clutch (18). Become a fulcrum link (28)
Is performed via the lever arm (32) having the minimum working length (L2), the on-lever (22) main clutch (18) engagement operation force is reduced as compared with the conventional case, and the operation section (15a) is moved. On lever (22) with thumb of gripped hand
Operational power is reduced and operability is improved.
While gripping a), lightly operate the on-lever (22) to start the machine, prevent the aircraft attitude from swinging to the left and right when starting, and prevent leftover tillage, damage to crops, etc. Is configured to eliminate the inconvenience.

This embodiment is constructed as described above, and the on lever (22) is moved in the direction of the dashed arrow in FIG. 1 from the state in which all the levers (17) and (22) are in the off position as shown by the solid line in FIG. When turning on, the on lever (22)
The operating force of the lever arm (32) and the rotating body (3)
1), transmitted to the main clutch lever (17) via the shaft (30) and the clutch arm (26). In this case, the working length of the main clutch lever (17), the support shaft (24) and the shaft (30). ) Is constant and the on-lever (2)
Distance (L2) between the rotating body (31), the contact portion of the lever arm (32), and the support shaft (33), which is the contact operation length of 2).
Reduces the distance (L2) sequentially as the lever arm (32) swings upward about the support shaft (33). Therefore, if the operating force at the time of the ON operation of the main clutch lever (17) is kept constant, the operating force of the ON lever (22) can be proportionally reduced by the decrease in the distance (L2). As shown in FIG.
8) When the operating force of the main clutch lever (17) is required to maximize the pulling force of the wire (29) near the fulcrum near the fulcrum, the distance (L2) is minimized, whereby the on lever ( The operation force of 22) can be reduced, that is, when the fulcrum of the main clutch lever (17) is exceeded, the relation of the distance (L2) of the on lever (22) is smaller than that at the time of the off position. The operation force of the ON lever (22) can be reduced.

[0011]

As can be seen from the above embodiment, the present invention allows the main clutch lever (17) provided on the steering handle (15) to be connected to the main clutch (18) via the fulcrum link (2).
8) and a clutch wire (29), and an on-lever (22) is provided on the inside of the operation portion (15a) of the steering handle (15) in a substantially parallel plane view to allow the operation portion (15a) to be connected. On lever (22) with thumb of grasped hand
In the clutch operating device of the mobile agricultural machine for operating the main clutch lever (17) by operating the rotary body (31), the rotary body (31) is attached to the shaft (30) fixed to the main clutch lever (17), and the rotary body (31) The lever arm (32) to be brought into contact with is fixed to the on-lever (22), and the rotating body (3)
The operation length (L2) of the lever arm (32) from the support shaft (33) with respect to 1) is formed so as to gradually decrease during the ON operation of the ON lever (22), and the operating force of the main clutch lever (17) is reduced. The working length (L2) of the lever arm (32) is minimized at the point when the fulcrum exceeds the maximum required fulcrum, and the movement of the fulcrum link (28) for engaging the main clutch (18) causes the clutch to move. The working length (L2) of the lever arm (32) decreases in proportion to the increase in the tension of the wire (29), and the fulcrum exceeding operation of the fulcrum link (28) is reduced to the minimum working length (L2).
Of the on-lever (22), the on-lever (22) of the thumb of the hand gripping the operating portion (15a) can be reduced more easily than before. The operation force can be reduced and the operability can be easily improved. The on-lever (22) can be lightly operated while the operation unit (15a) is being gripped to start the machine. In this way, it is possible to easily prevent a problem such as the occurrence of residual tillage or damage to crops by easily preventing the water from falling off the course.

[Brief description of the drawings]

FIG. 1 is an explanatory side view of a main clutch lever portion.

FIG. 2 is an overall side view of the management machine.

FIG. 3 is an explanatory plan view of a main clutch lever portion.

FIG. 4 is an explanatory diagram showing the same operation state.

[Explanation of symbols]

 (15) Steering handle (15a) Handle operating section (17) Main clutch lever (18) Main clutch (clutch element) (22) On lever (28) Crossing fulcrum link (29) Clutch wire (30) Shaft (31) Rotation Body (32) Lever arm (one-touch member) (33) Support shaft (L2) Working length

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G05G 1/24 G05G 1/24 C

Claims (1)

[Claims] 1. A main clutch lever (17) provided on a steering handle (15) is connected to a main clutch (18) via a fulcrum link (28) and a clutch wire (29). ) Operation unit (15a)
An on lever (22) is provided substantially parallel to the plane inside the
In a clutch operating device of a mobile agricultural machine in which an on-lever (22) is operated with a thumb of a hand gripping the operation unit (15a) and a main clutch lever (17) is engaged, a shaft ( 30) Rotating body (3
1), and a lever arm (32) to be brought into contact with the rotating body (31) is fixed to the on-lever (22), and the support shaft (3) of the lever arm (32) with respect to the rotating body (31).
The working length (L2) from 3) is formed so as to gradually decrease during the on-operation of the on-lever (22), and the lever arm (32) at the point when the operating force of the main clutch lever (17) exceeds the fulcrum where the maximum is required. ) Is configured such that the operation length (L2) is minimized.