JPH0650024Y2 - Clutch operating device for mobile agricultural machinery - Google Patents

Description

[Detailed description of the device]

[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 work.

[0002] "Prior Art", Japanese Utility Model Laid-Open No. 61-95284, has a means for providing an on-lever for turning on a clutch near a handle clip.

“Problems to be solved by device” However, in this case,
When the clutch is turned on by operating the on lever,
The tension of the clutch operation wire also increases the lever operation force, and it is impossible to operate the on-lever with a finger while grasping the handle.

Therefore, in the present invention, a main clutch lever for turning on / off a clutch element provided in the machine and a sub-clutch lever for turning on the clutch element are provided in the vicinity of a handle operating portion of the machine. In the above structure, an on-operation rotating body is integrally attached to the main clutch lever, and an on-operation one-touch member for contacting the rotating body to operate the main clutch lever in an on-state is provided as the auxiliary clutch lever. The contact action length of the one-touch member with respect to the rotating body is gradually reduced during the ON operation of the sub clutch lever.

Then, the ON operation force of the sub clutch lever is reduced by an amount corresponding to the contact action length of the one-touch member that is made smaller than the rotating body of the main clutch lever, and the finger of the sub clutch lever is reduced. It is possible to easily and surely perform the operation by, and to improve safety and workability.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a side view of the main clutch lever portion, and FIG.
The figure is an overall side view of the management machine.In the figure, (1) is the chassis,
(2) is an engine mounted on the chassis (1), (3) is a mission case in which the rear end of the chassis (1) is integrally connected, and (4) is a shaft mount at the bottom of the mission case (3). Axle, (5) running wheels supported on the axle (4), (6) a front hitch for fixing balance weights etc. fixed to the front end of the chassis (1), and (7) an engine (2). Fuel tank installed in the upper part, (8) is the output pulley (9) of the engine (2)
And a transmission case in which an input pulley (10) of the mission case (3) and a V-belt (11) suspended between the pulleys (9) and (10) are installed, and (12) is a bracket at the front end of the chassis (1).
A stand that is foldably attached to (13), (14) is a handle base that is horizontally rotatably supported on the upper end of the mission case (3), and (15) is a steering handle that is connected to the handle base (14). 16) is a rear hitch fixed to the rear of the middle of the mission case (3), and (17) is a clutch element, that is, a main clutch (1) which is a tension pulley of the V belt (11).
8) is a main clutch lever for on / off operation, (19) is a traveling speed change lever, and (20) is a side clutch lever, and the steering handle (15) is extended forward or backward of the body to move forward or backward. It is configured to perform agricultural work.

As shown in FIG. 3, the main clutch lever
(17) is provided near the operation part (15a) which is a handle part of the handle (15) through a lever guide plate (21).
An on-lever (22) and an off-lever (23), which are sub clutch levers, are arranged in parallel with the (17). The main clutch lever (17) has a support shaft (24) fixedly mounted on a bracket (21a) of a lever guide plate (21) swingably supports a proximal end cylindrical shaft (25) and also has a cylindrical shaft (25). ) Clutch arm (26) fixed at the base end
The tip is connected to the clutch wire (29) of the main clutch (18) through the pin (27) and the fulcrum crossing link (28), and the main clutch lever (17) is swung forward in the arrow direction of FIG. The wire (29) is pulled to engage or disengage the main clutch (18) when operated to bring it into a virtual line state.

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 provided. The lever arm (32), which is a one-touch member integrally connected to the rotary body (31), is provided so as to abut and lock the rotary body (31). The on-lever (22) is attached to the fixed support shaft (33) of the bracket (21a) at the base end cylindrical shaft (3).
4) is swingably supported, the base end of the lever arm (32) is connected and fixed to the cylinder shaft (34), and the lever arm is attached to the rotating body (31) when the main clutch lever (17) is off. When the on-lever (32) is held in the off position by abutting and locking (32), the on-lever (32) is swung in the direction of the downward arrow in FIG. The rotating body (31) is actuated by (32) to raise the rotating body (31) to switch the main clutch lever (17) to an on-operation to turn on the main clutch (18).

Reference numeral (35) is a stopper pin of the main clutch lever (17), which is pulled by the pulling force of the wire (29).
The lever (17) is brought into contact with and locked to the lever (5) to hold it off, and the clutch arm (26) is brought into contact with and locked to the pin (35) to hold it on.

This embodiment is constructed as described above, and when the levers (17) and (22) are in the off position as shown by the solid line in FIG. 1, the on lever (22) is moved in the direction of the broken line arrow in FIG. The operation force of the on-lever (22) is transmitted to the main clutch lever (17) via the lever arm (32), the rotating body (31), the shaft (30) and the clutch arm (26) when the on-operation is performed. so,
At this time, the spindle (24) which is the working length of the main clutch lever (17)
The distance between the shaft and the shaft (30) (liter) is constant, and the on-lever
The distance (L) between the contact point between the rotating body (31) and the lever arm (32) and the support shaft (33), which is the working length of the (22), is the lever arm (32) about the support shaft (33). The distance (L) is gradually reduced as the oscillates upward. Therefore, if the operating force at the time of turning on the main clutch lever (17) is constant, the operating force of the on-lever (22) can be proportionally reduced as the distance (L) becomes smaller. As shown in FIG. 4, when the operation force of the main clutch lever (17) is maximized so that the tensile force of the wire (29) near the fulcrum of the link (28) is maximized, the distance (L) is reduced. By minimizing it, the operating force of the on-lever (22) can be reduced, that is, when the fulcrum of the main clutch lever (17) is exceeded, the relationship of the distance (L) of the on-lever (22). The operating force of the on-lever (22) can be reduced as is smaller than that at the off position.

[0011]

[Effects of the Invention] As is apparent from the embodiments described above, the present invention provides a main clutch lever (17) for turning on and off the clutch element (8) provided in the machine and a sub clutch for turning on and off the clutch element (8). In the structure in which the clutch lever (22) is arranged in the vicinity of the handle operating portion (15a) of the machine, the main clutch lever (17) is integrally provided with the rotating body (31) for on-operation, and the rotating body (31 ), And an on-operation one-touch member (32) for interlocking the main clutch lever (17) to perform an on-operation is fixed to the sub-clutch lever (22), and the one-touch member (32) for the rotating body (31) is attached. The contact action length (L) is set so as to be gradually reduced during the ON operation of the sub clutch lever (22), and this operation force is reduced during the ON operation of the sub clutch lever (22). Easily and securely the auxiliary clutch lever (22) with a small operating force such as fingers Operation as it can be possible, therefore handle (15) a reliable clutch operation in a state of being stick in both hands can thereby improving the safety and operability.

[Brief description of drawings]

FIG. 1 is a side view illustrating a main clutch lever portion.

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

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

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

[Explanation of symbols]

 (15a) Handle operation part (17) Main clutch lever (18) Clutch element (22) Sub clutch lever (31) Rotating body (32) One-touch member (L) Working length

Claims (1)

[Scope of utility model registration request] 1. A structure in which a main clutch lever for turning on / off a clutch element provided in the machine and a sub clutch lever for turning on / off the clutch element are arranged in the vicinity of a handle operating portion of the machine, and the main clutch lever is provided. An on-operation one-touch member for integrally turning on the on-rotation member and abutting on the on-rotation member to interlock the main clutch lever to perform an on-operation is fixedly provided on the sub clutch lever. A clutch operating device for a mobile agricultural machine, wherein the contact action length is configured to be successively reduced during the ON operation of the sub clutch lever.