JPH0524459A - Clutch operation device - Google Patents

Abstract

(57) [Summary] [Purpose] The clutch can be operated while holding the steering handle of the walk-type cultivator, the clutch operation lever can be rotated smoothly, and the lever stroke can be shortened to open and close the clutch. To ensure that [Structure] A wire operation tool 16 and a lever operation tool 17 are pivotally attached to a mounting plate 13. A clutch operating lever 22 is fixedly mounted on the lever operating tool 17, and a pin 23 is projectingly provided in the vicinity of a rotation base portion thereof to engage with a long hole 24 opened in the mounting plate 13.
When the clutch operating lever 22 is rotated, the pin 23 slides in the elongated hole 24 and comes into contact with the end portion of the elongated hole 24, and the clutch operating lever 22 crosses the dead point and is turned "on" or "off". Positioned.

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, and more particularly to a clutch operating device in which a steering handle is provided with a clutch operating lever in a walk-type cultivator or the like.

[0002]

2. Description of the Related Art In the operation of a walking cultivator of this kind, a pair of left and right steering handles are grasped to move the attitude of the machine back and forth,
Alternatively, turn while turning left and right. When operating the clutch, it is configured such that one hand is released from the grip portion of the steering handle, the clutch operating lever is swung quickly, and then the steering handle is gripped with both hands again to continue steering. There are many things.

It has also been proposed that an operating lever for turning the clutch on or off is provided near the inside of the grip portion of the steering handle so that the operating lever of the clutch can be turned on and off while holding the steering handle with both hands.

[0004]

The former of the conventional walk-type cultivators, the clutch operation cannot be performed unless one hand is once released from the steering handle, the operation is complicated, and even if one-hand operation is performed, it is dangerous. is there. On the other hand, the latter of the conventional type is an improvement of this defect, and the clutch can be operated by rotating the operation lever with the fingertips while holding the steering handle with both hands. However, when the clutch is turned on or off, the operation lever may be swung or the lever stroke may be large.

Therefore, there arises a technical problem to be solved in order to smoothly rotate the clutch operating lever and shorten the lever stroke to surely perform the on / off operation of the clutch. It aims to solve problems.

[0006]

The present invention has been proposed in order to achieve the above object, and one end of a clutch wire is locked to a wire operation tool, and the wire operation is performed by rotating a clutch operation lever. In a clutch operating device for moving a tool over a dead center to an "on" or "off" position, a pin is provided in the vicinity of a rotation base of the clutch operation lever, and a rotation fulcrum of the clutch operation lever is pivotally attached. A clutch operating device is characterized in that a long hole is opened in the mounting plate, the pin is engaged with the mounting plate, and the rotation range of the clutch operating lever is restricted to a position range of "ON" to "OFF". Is provided.

[0007]

The pivoting fulcrum of the clutch operating lever is pivotally attached to the mounting plate, and when the clutch operating lever is pivoted in either the "on" or "off" direction, the pin protruding near the pivot base is Slide in the long hole of the mounting plate. Therefore, the rotation of the clutch operating lever is smoothly guided by the elongated hole, and the wire operating tool is moved to the "on" or "off" position to reach the dead point to switch the clutch. At that time, the pin reaches the one end of the elongated hole and is locked, and the clutch operating lever is restricted so as not to rotate any more. That is, the clutch operating lever is positioned in the "on" or "off" state.

[0008]

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 shows a walk-type cultivator, in which an engine 2 is mounted on the front part of a machine body 1, and the power of the engine 2 is transmitted through a belt tension clutch (not shown) in a transmission cover 3 to a transmission case. 4 is transmitted. Transmission case 4
An axle 5 is provided on the lower part of the vehicle so that the left and right wheels 6 and 7 are pivotally attached. Then, a pair of left and right steering handles 8 and 9 are projectingly provided to the rear of the machine body 1, gripping portions 10 and 11 are provided at respective rear end portions, and a clutch operating device 12 is attached to the belt tension clutch, which is a main clutch. It is configured so that it can be operated.

FIG. 2 shows a main part of the clutch operating device 12, in which an operation tool mounting plate 13 is fixedly provided near the one gripping portion 11, and pins 14 and 15 are provided on the side surfaces thereof so as to project therefrom. A rotation fulcrum portion 16a of a wire operation tool 16 is pivotally attached to the pin 14, and a rotation fulcrum portion 17a of a lever operation tool 17 is pivotally attached to the pin 15.
To pivot. Then, the wire operation tool 16 has a long hole 18
Rotating body 1 which is opened and is pivotally attached to the tip of the lever operation tool 17.
9 is engaged, the locking tool 20 is pivotally attached to the tip of the wire operating tool 16, and one end of the clutch wire 21 is locked.

Further, the rotation fulcrum 17a of the lever operating tool 17
The base portion of the clutch operating lever 22 is fixed to the clutch operating lever 22, and the clutch operating lever 22 is projected rearward so as to be substantially along the grip portion 11 of the steering handle 9. Further, in the figure, a lever operating tool 17 near the rotation base of the clutch operating lever 22 is shown.
A positioning pin 23 is provided on the back surface of the projection 23, and a long hole 24 is opened at a corresponding position of the operation tool mounting plate 13 to engage the pin 23.

In FIG. 2, the clutch operating lever 22 is flipped up and the clutch wire 21 is pulled, and the clutch is "on". If the operator pushes down the clutch operating lever 22 with his fingertip, the pin 1
5, the lever operating tool 17 rotates clockwise in the figure, and since the rotating body 19 and the elongated hole 18 are engaged with each other, the wire operating tool 16 rotates counterclockwise about the pin 14 as a fulcrum. Move. In that case, the pin 2 on the back side of the lever operation tool 17
3 and the long hole 24 are engaged with each other, the pin 23 slides in the long hole 24 in accordance with the rotation of the clutch operating lever 22 to guide the rotation of the clutch operating lever 22 to cause a shake or the like. A smooth turning operation is performed without causing any trouble.

Then, as shown in FIG. 3, the clutch operating lever 22 rotates downward and the rotating body 19 of the lever operating tool 17 pushes up the long hole 18 of the wire operating tool 16 to cause the wire operating tool 16 to move. The locking tool 20 stops in a state where the pin 14 has passed the dead center, the clutch wire 21 is pulled back to the main clutch side, and the clutch is turned off. At that time, the pin 23 reaches the one end of the elongated hole 24 and is locked, and the clutch operating lever 22 is regulated so as not to rotate further. That is, the clutch operating lever 22 is positioned with the clutch in the "on" or "off" state, and the lever stroke does not exceed the rotation range.

Further, as shown in FIG. 4, the operation tool attachment plate 13 of the clutch operation device 12 is obliquely attached to the steering handle 9 so that the operator holds the grip 11 while operating the clutch operation lever 22. When the finger is pushed downward from the "on" state with the fingertip, the clutch operating lever 22 rotates to the position beyond the dead center as described above, and "off".
It becomes the state of. On the other hand, turn off the clutch operating lever 22.
From this state, the operator pushes the clutch operating lever 22 upward inward with the fingertip or pivots upward with the palm to move the clutch operating lever 22 to the "on" state to reach the dead center. That is, "ON"
The changeover operation from "off" to "off" can be performed lighter and faster, which can contribute to the improvement of safety in an emergency.

FIG. 5 shows a mounting portion of the handle frame 25, and a spacer 28 of synthetic resin or the like is interposed between the lock plate 26 of the handle frame 25 and the handle bracket 27. Therefore, the lock lever 2
9 is rotated downward to disengage the lock pin 30 from the lock plate 26, and the handle frame 25 is horizontally rotated, so that the handle frame 25 and the lock plate 26 are moved to the left and right around the rotation shaft pin 31. The steering handle can be turned in any direction. In that case, since the synthetic resin spacer 28 is interposed, the turning direction of the handle frame 25 becomes extremely smooth, and the turning shaft pin 31 is fitted to the handle bracket 27. The occurrence of backlash is also suppressed.
Further, since the synthetic resin spacer 28 facilitates the rotation, the surface processing accuracy of the component is facilitated and the assembling property is also improved.

FIGS. 6 and 7 show the mounting portion of the fuel tank 32. The fuel tank bracket 33 is bolted to the upper surface of the engine 2 to cover the front upper surface and the left and right upper surfaces of the engine 2. ing. The fuel tank bracket 33 is formed along the shape of the fuel tank 32 in consideration of aesthetics, and is formed so that the high heat of the engine 2 is not directly transmitted to the fuel tank 32. Furthermore, the muffler 3 protruding from the side of the engine 2
4 is covered with a muffler cover 35, serves as a shield for the exhaust heat of the muffler 34, and is covered with a bonnet cover 36.

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention covers the modified ones.

[0017]

As described in detail in the above one embodiment, the present invention has a pin projecting in the vicinity of the rotation base of the clutch operating lever so as to engage with the elongated hole of the mounting plate so that the "insertion" over the dead point is performed. And "off"
Is being positioned. Conventionally, the guide pin was provided as a separate member from the clutch operating lever, so the rotation of the clutch operating lever was not smooth, but the clutch operating lever and the pin were formed integrally, so there was an error during operation. Is extremely small, the clutch operating lever is reliably positioned at the “on” or “off” position, and the lever stroke can be made as small as possible, which can contribute to improvement in operability.

[Brief description of drawings]

FIG. 1 is a side view of a walk-behind cultivator according to an embodiment of the present invention.

FIG. 2 is a side view of the essential parts of the clutch operating device with the clutch “on”.

FIG. 3 is a side view of essential parts of the clutch operating device with the clutch being “disengaged”.

FIG. 4 is a rear view of the essential parts of the clutch operating device with the clutch in the “on” state.

FIG. 5 is a vertical sectional side view of a main part of a mounting portion of a handle frame.

FIG. 6 is a side view of a main part of a mounting portion of a fuel tank.

FIG. 7 is a plan view of a main part of a mounting portion of a fuel tank.

[Explanation of symbols]

 12 Clutch Operating Device 13 Operating Tool Mounting Plate 14, 15 Pin 16 Wire Operating Tool 17 Lever Operating Tool 20 Locking Tool 21 Clutch Wire 22 Clutch Operating Lever 23 Pin 24 Long Hole

Claims (1)

Claims: 1. One end of a clutch wire is locked to a wire operation tool, and the wire operation tool is crossed to a "on" or "off" position by rotating a clutch operation lever. In the clutch operating device, a pin is provided in the vicinity of the rotation base of the clutch operation lever, and a long hole is opened in an attachment plate pivotally supporting the rotation fulcrum of the clutch operation lever to engage the pin. The clutch operating device is characterized in that the rotation range of the clutch operating lever is restricted within the range of "ON" to "OFF".