JPS6215062Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a clutch operating device for mobile agricultural machinery.

Conventionally, many walking-type mobile agricultural machines having a handle have used a tension clutch, and the handle is generally provided with an operating lever for engaging and engaging the tension clutch.
In addition, when operating the control lever, one hand must be removed from the handle, and it is difficult to suddenly disengage the clutch and stop the operation during operation, which may lead to danger.

This invention was developed in view of the above, and the object is to provide a clutch operating device for a mobile agricultural machine that can instantly disengage the clutch while holding the handle grip.

This device biases an operating lever provided on a rod-shaped handle that engages and disengages the clutch in the direction of disengaging the clutch, and also provides a movable locking member that locks the operating lever with the clutch connected. By providing a lock release lever that moves the member in the unlocking direction close to the grip of the handle, the clutch can be instantaneously disengaged while holding the grip of the handle.

An embodiment of this invention will be described based on the drawings. A body 2 of a mobile agricultural machine having a pair of left and right running wheels 1 is provided with a rod-shaped handle 3 extending rearward. A case body 4 is provided at the rear of the handle 3.
is fixed, and a U-shaped guide groove 5 is formed in the upper surface of the case body 4. The case body 4
Inside are fixed shafts 6, 7, 8 with left and right axes.
is fixed, and a boss 9 that is rotatable in the front and rear directions around the axis is attached to the center portion of the fixed shaft 6 in the left-right direction, and the boss 9 extends upward and is inserted into the guide groove 5. The operating lever 10 is connected to the pin 10a.
are connected to be rotatable in the left and right directions. Furthermore, rotating bodies 11 are provided at both left and right ends of the fixed shaft 6.
12 is fitted to be rotatable around the axis of the fixed shaft 6, and one rotating body 11 has a low-speed side tension arm (not shown) of a double tension clutch (not shown) that is a clutch. One end of a wire 13 is connected to the rotating body 12, and a wire 14 connected to the high speed side tension arm (not shown) of the double tension clutch is connected to the other rotating body 12.
One end of is connected. Furthermore, the rotating body 1
1 and 12 are formed with an engagement groove 15 in which the operating lever 10 is engaged, and the rotating bodies 11 and 1
Pins 16 and 17 are fixed to 2, respectively.

A cylindrical body 18 is fitted to the fixed shaft 8 so as to be rotatable around the axis of the fixed shaft 8, and plates 19, which are locking members, are provided at both left and right ends of the cylindrical body 18.
20 is fixed, and a lock release lever 21 extending rearward is fixed to the center portion of the cylindrical body 18 in the left-right direction. This lock release lever 21 protrudes outward from the inside of the case body 4, and its rear end is located close to the side of the grip portion 22 of the handle 3. The plates 19 and 20 have a guide surface 23 on which the pins 16 and 17 move while being joined when the operating lever 10 is rotated in the front-back direction;
The pin 16 is located at the end of this guide surface 23,
17 is formed, and a spring 2 is formed between the protrusion 25 formed on the plate 19 so as to protrude laterally and the fixed shaft 7.
6 is stretched.

In such a configuration, by rotating the operating lever 10 to the left after rotating it forward, the operating lever 10 engages the engagement groove 15 of the rotating body 12 connected to the high-speed side tension arm. By being engaged and rotating to the right, the operating lever 10 is engaged with the engagement groove 15 of the rotating body 11 connected to the low-speed tension arm. When the operating lever 10 is rotated backward along the guide groove 5 while being engaged with the engagement groove 15 of the rotating body 11, the rotating body 11 is rotated backward around the axis of the fixed shaft 6.
As the wire 13 is pulled backward, the pin 16 moves while being joined to the guide surface 22 of the plate 19, and eventually the pin 16 engages with the engaging portion 24 and moves forward of the rotating body 11 and the operating lever 10. The rotational movement in the return direction is locked. Note that this lock maintains the tension clutch in a state where the gear is shifted to the low speed side. Similarly, when the operating lever 10 is rotated backward along the guide groove 5 while engaged with the engagement groove 15 of the rotating body 12, the wire 14 is pulled backward by the rotation of the rotating body 12. When the tension clutch is shifted to the high speed side, the pin 17 engages the engaging portion 24 of the plate 20.
The rotating body 12 and the operating lever 10 are locked from rotating in the forward return direction. When working at high speed or low speed, when the tension clutch is disengaged to stop the machine 2 from moving, push the lock release lever 21 downward. As a result, the lock release lever 21, the cylindrical body 18, and the plates 19, 20 rotate integrally around the axis of the fixed shaft 8 against the tensile force of the spring 26, and the pin 16,
17 is disengaged from the engaging portion 24, the operating lever 10 and the rotating bodies 11, 12 are automatically rotated forward by the tensile force of the wires 13, 14, and the tension clutch becomes disengaged. In this way, to disengage the tension clutch, it is only necessary to push the lock release lever 21 downward, and since the lock release lever 21 is provided close to the grip part 22 of the handle 3, it is easy to grip the grip part 22. It is possible to disengage the tension clutch in the same state, and even in sudden situations, the aircraft 2 can be stopped instantaneously to avoid danger.

In this invention, as mentioned above, the lock release lever that moves the locking member that locks the clutch in the engaged state in the unlocking direction is provided close to the grip of the handle, so that it is possible to keep the clutch in the engaged state. The clutch can be disengaged by operating the lock release lever, which has the effect of instantly stopping the movement of the aircraft and avoiding danger even in sudden situations.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
2 is an enlarged longitudinal sectional side view of a portion thereof, and FIG. 3 is a cross-sectional plan view showing a state in which the gear has been shifted to a high speed side. 2...Body, 3...Handle, 10...Operation lever, 19-20...Plate (lock member),
21...Lock release lever, 22...Grip portion.

Claims (1)

[Scope of utility model registration request] An operating lever for engaging and disengaging the clutch is provided on a rod-shaped handle of the body of the mobile agricultural machine, and a locking member is moved that urges the operating lever in the direction of disengaging the clutch and locks the operating lever with the clutch connected. A clutch operating device for a mobile agricultural machine, characterized in that a lock release lever is provided in close proximity to a grip portion of the handle for freely disposing the lock member and moving the lock member in the unlocking direction.