JPH081241U - Clutch operating device for mobile agricultural machinery - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To easily and surely perform an operation of a clutch lever (23) with a finger to improve workability. SOLUTION: A structure is provided in which a clutch lever (23) is arranged near a rear end of a handle (15) extending rearward of the main body in a plan view in a substantially parallel manner to an operating portion (15a) substantially parallel to left and right in plan view. At the end of the handle (15), the base end of the clutch lever (23) is rotatably rotatably supported, and the operating portion on the tip side of the clutch lever (23) is attached to the operating portion (15a) of the handle (15). ) Is provided substantially parallel to the side portion, and the operating portion of the clutch lever (23) is located near the operating portion (15a) of the handle (15).

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a clutch operating device for a walk-behind mobile agricultural machine such as a management machine that performs various management tasks.

[0002]

[Prior art]

 Conventionally, as shown in Japanese Utility Model Application No. 61-95284, there has been provided a clutch lever for operating a clutch near the handle grip.

[0003]

[Problems to be solved by the device]

 However, when the clutch lever is lengthened and the operating force is reduced, the clutch lever base end is attached to the diverging inclined part in the middle of the handle, the clutch lever operating part separates from the operating part of the handle, and the There was a problem that the lever operation force became so large that it was not possible to easily operate the clutch lever finger while grasping the handle.

[0004]

[Means for Solving the Problems]

 Therefore, according to the present invention, in the structure in which the clutch lever is arranged in the vicinity of the substantially parallel operation portion on the rear end side of the handle, which is extended in the rear end of the machine in the shape of the letter C in plan view, which is substantially parallel to the left and right sides of the handle, The clutch lever base end is rotatably supported by the diverging portion, the clutch lever tip side operation part is provided in a substantially horizontal manner on the operation part side of the handle, and the clutch lever operation part is provided on the handle. The clutch lever can be made longer to reduce the operating force, and the operating part of the clutch lever can be brought closer to the handle to improve the finger operability of the clutch lever. The operation of the clutch lever with a finger can be performed easily and reliably, and workability can be improved more easily than in the past.

[0005]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view of the main clutch lever portion, and FIG. 2 is an overall side view of the management machine. In the figure, (1) is a chassis, (2) is an engine mounted on the chassis (1), and (3) is A mission case in which the rear end of the chassis (1) is integrally connected, (4) is an axle mounted on the lower part of the mission case (3), (5) is a running wheel supported on the axle (4), (6) is a front hitch for fixing a balance weight etc. by fixing it to the front end of the chassis (1), (7) is a fuel tank mounted on the upper part of the engine (2), and (8) is for the engine (2). A transmission case in which an output pulley (9) and an input pulley (10) of a transmission case (3) and a V-belt (11) suspended between the pulleys (9) and (10) are internally provided, and (12) is the chassis (1). ) Front bracket (13 (14) is a handle base that is supported on the upper end of the mission case (3) so as to be horizontally rotatable, and (15) is a steering handle that is connected to the handle base (14), and (16). Is a rear hitch fixed to the middle rear of the mission case (3), (17) is a main clutch lever for turning on and off a clutch element, that is, a main clutch (18) which is a tension pulley of the V-belt (11), Numeral 19) is a traveling speed change lever, and numeral 20 is a side clutch lever, which is configured to extend the steering handle 15 in front of or behind the machine body and to move forward or backward to perform farming. .

As shown in FIG. 3, the main clutch lever (17) is provided in the vicinity of an operating portion (15a) which is a grip portion of the handle (15) via a lever guide plate (21). An on-lever (22) and an off-lever (23), which are sub clutch levers, are arranged in parallel with (17). 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) and at the same time, the cylinder shaft (25). ) Is connected to the clutch wire (29) of the main clutch (18) via a pin (27) and a fulcrum crossing link (28). When the lever (17) is swung forward in the direction of the arrow in FIG. 1 to bring it into a virtual line state, the wire (29) is pulled to engage or disengage the main clutch (18).

Further, as is apparent from the above, the handle (15) extending toward the rear of the main body in the shape of a letter C in plan view has a clutch lever in the vicinity of the operation part (15a) which is substantially parallel to the rear end side of the handle (15) in plan view. In the structure in which the off-lever (23) is provided, the base end of the off-lever (23) is rotatably supported by the flared end of the handle (15), and the operation of the tip side of the off-lever (23) is performed. The handle is provided substantially parallel to the side of the handle (15a) of the handle (15), and the handle of the off-lever (23) is located near the handle (15a) of the handle (15). (15) The clutch lever (23) is offset to the handle (15) side so that the operator can operate the clutch lever (23) while holding the operating part deeply.

Further, a shaft (30) is fixedly mounted on the clutch arm (26), and an ON operation rotating body (31) is freely rotatably fitted to the shaft (30), and the ON lever (22) is attached. 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) swingably supports a base end cylinder shaft (34) on a fixed support shaft (33) of the bracket (21a), and at the same time, the cylinder shaft (34) supports the lever arm (32) base. The ends are connected and fixed, and when the main clutch lever (17) is off, the lever arm (32) is abutted and locked to the rotating body (31) to hold the on-lever (32) in the off position, and the on-lever (32) is held. 32) swinging downward in the direction of the arrow in FIG. 1 to bring it into a virtual line state, the lever arm (32) acts to lift the rotating body (31) to turn on the main clutch lever (17). The main clutch (18) is turned on by switching to.

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

The present embodiment is configured 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) through the lever arm (32), the rotating body (31), the shaft (30) and the clutch arm (26) when it is turned on. At this time, the axial distance (L1) between the support shaft (24) and the shaft (30), which is the working length of the main clutch lever (17), is constant, and the rotating body (the working length of the on-lever (22) ( The distance (L2) between the contact point between the lever (31) and the lever arm (32) and the support shaft (33) is the distance (L2) as the lever arm (32) swings upward about the support shaft (33). ) Is gradually reduced. 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 by the reduction of the distance (L2). As shown in FIG. 4, when the operation force of the main clutch lever (17) that maximizes the tensile force of the wire (29) near the fulcrum of the link (28) is the maximum, the distance (L2) 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 crossed, the distance (L2) of the on-lever (22) can be reduced. The operating force of the on lever (22) can be reduced as the relationship is made smaller than that at the off position.

[0011]

[Effect of device]

 As is apparent from the above-described embodiments, the present invention provides a clutch near the rear end of the handle (15) extending rearwardly of the machine in the shape of a letter C in plan view. In the structure in which the lever (23) is arranged, the base end of the clutch lever (23) is rotatably supported by the divergent portion of the handle (15), and the operating portion on the tip side of the clutch lever (23) is The handle (15) is provided substantially parallel to the side of the operating portion (15a), and the operating portion of the clutch lever (23) is located near the operating portion (15a) of the handle (15). The clutch lever (23) can be lengthened to reduce the operating force, and the operating portion of the clutch lever (23) can be brought closer to the handle to improve the finger operability of the clutch lever (23). In addition, the clutch can be turned on and off with a light finger operation while holding the operating part of the handle as deeply as when working, allowing quick response to unforeseen situations such as the danger of operator error. Therefore, the operation of the clutch lever (23) with the finger can be performed easily and surely, and the workability can be easily improved as compared with the conventional case.

[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]

 (15) Handle (15a) Handle operation part (23) Off lever (clutch lever)

Claims (1)

[Scope of utility model registration request] 1. A clutch lever (23) is disposed near a rear end of a handle (15) extending rearwardly of the machine in a plan view C-shape and near an operation portion (15a) which is substantially parallel to the left and right in plan view. In the structure, the base end portion of the clutch lever (23) is rotatably supported by the divergent portion of the handle (15), and the operation portion on the tip end side of the clutch lever (23) is the operation portion of the handle (15) ( 15a) is provided substantially parallel to the side portion, and the operation part of the clutch lever (23) is located near the operation part (15a) of the handle (15).