JPH07310760A - Clutch lever of control machine - Google Patents

Abstract

PURPOSE:To facilitate operation and to avoid wrong operation by attaching a detent to a driving gear externally fitted to a rotary shaft of a clutch lever through a one-way clutch and pivoting the end part of a clutch wire to a driven gear. CONSTITUTION:When a clutch lever 9 is pressed by a finger from the press position of an upper stopper 20a to be pressed to a lower stopper 20b, a driving gear 17 is turned by a 60-degree and a driven gear 15 is turned by 180-degree. When the finger is separated, the driving gear 17 and the driven gear 15 are held by a detent device 18 to be located as they are, a rotational fulcrum shaft 9a is freely rotated upward by a one-way clutch 16, and the clutch lever 9 is turned upward by a return spring 19 and stopped in in its initial position. At this time, when the position where a clutch wire 14 is stretched most strongly is taken as the 'connect' position X, and the position where it is most loosened is taken as the 'disconnect' position Y, the driven gear 15 is turned in a 180-degree arc by one finger operation of the clutch lever 9, and the clutch can be switched to the 'connect' or 'disconnect' by each one finger operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a clutch lever in a management machine, which can be operated to open and close a main clutch with one finger.

[0002]

2. Description of the Related Art Conventionally, the structure of a clutch lever, which is a clutch lever disposed in a handle of a management machine, and which allows the main clutch to be turned on and off by operating the lever with one finger, has been publicly known. , For example, fairness 4-2769
Two lever structure as shown in 7 and Japanese Patent Publication No. 5-49
There is a single lever as shown in 490.

[0003]

With the conventional clutch lever having the two-clutch structure, the operation is complicated and an operation error is likely to occur. In addition, the one-lever structure has a complicated structure as in the above-described conventional technique, and the "engagement" operation of the clutch is easy to perform by pressing the finger,
When performing the "off" operation, the lever had to be lifted with a finger, which made the operation difficult and caused an operation error.

[0004]

The present invention uses the following means in order to solve the above problems. That is, in the main clutch lever arranged in the handle of the management machine, the drive gear is externally fitted to the rotation shaft of the clutch lever via the one-way clutch, and the detent device is attached to the drive gear and held at a predetermined position. The driven gear is engaged with the driven gear, and the end portion of the clutch wire is pivotally supported by the driven gear.

[0005]

When the clutch lever is pressed with a finger, the drive gear and the driven gear are rotated to pull or loosen the clutch wire, the drive gear is maintained in that position by the detent device, and the clutch lever is moved to the one-way clutch. Due to the interposition, it returns upward due to the spring force.

[0006]

The problems and configurations to be solved by the present invention are as described above, and the embodiments of the present invention shown in the accompanying drawings will be described below. 1 is an overall side view of the management machine, FIG. 2 is a plan view of the same, FIG. 3 is a side view of the clutch lever mechanism of the present invention, and FIG.
Is also a plan view.

The overall configuration of the management machine will be described with reference to FIGS. 1 and 2. The engine E is mounted on the engine base 1, and the transmission case 2 is transmitted from the engine E via the transmission case M.
It has a structure for driving the axle 3 to which the traveling wheels 4 are attached, and a hitch 5 for mounting a rotary tiller or the like is provided at the rear portion. A handle base 6 is pivotally supported on the upper part of the mission case M so as to be rotatable in all directions.
Has been extended. A main gear shift lever 8 is provided on the side of the handle base 6 so as to project, and a grip portion 7 a of the handle 7 is provided.
The clutch lever 9 and the auxiliary shift lever 1 are located near 7a.
0, and side clutch levers 11 and 11 for turning the left and right side clutches of the axle 3 in the mission case M to turn the vehicle.

The structure of the clutch lever 9 will be described with reference to FIGS. 3 and 4. The clutch lever 9 is a transmission case 2
It is a lever that pushes and pulls a tension pulley 13 that tensions a transmission belt 12 in the inside to transmit or cut power from the engine E. One end of a clutch wire 14 is attached to an arm that pivotally supports the tension pulley 13. The other end of the clutch wire 14 is connected to the mounting plate 20 attached to the handle 7 in front of the clutch lever 9.
The driven gear 15 is pivotally supported on the side circumferential portion. As the driven gear 15 rotates, the pivot point at the end of the clutch wire 14 rotates, and the clutch wire 14 is operated to be pulled and loosened. When the clutch wire 14 is pulled, the tension pulley 13 tensions the transmission belt 12 to "engage" the clutch. When the power is transmitted and loosened, the tension pulley 13 loosens the tension of the transmission belt 12 and the clutch "disengages".
It will be in a state and power will not be transmitted.

The clutch lever 9 is fixed to a rotation fulcrum shaft 9a, and the rotation fulcrum shaft 9a is pivotally supported by the mounting plate 20. Further, a drive gear 17 is externally fitted to the rotation fulcrum shaft 9a via a one-way clutch (one-way clutch) 16 that is a member that is allowed to rotate in only one direction, and pushes the clutch lever 9 downward. Only when it rotates, the rotation fulcrum shaft 9a and the drive gear 17 simultaneously rotate, releasing the clutch lever 9 and being pulled by the spring 19 to rotate upwards,
The rotation fulcrum shaft 9a idles and returns to its original position while the drive gear 17 remains unchanged.

A fixed rotary plate 17a extending from the drive gear 17 is externally fitted on the one-way clutch 16, and a plurality of ball fitting portions 17b are formed on the outer peripheral portion of the fixed rotary plate 17a. 17b ... is cut out. A detent device 18 that presses the ball 18a against the outer peripheral portion of the fixing rotary plate 17a from the mounting plate 20 by the pressing force of the spring 18b is provided. When the fixing rotary plate 17a is rotated, the ball 18a is released. When the ball 18 fits into the ball fitting portion 17b by riding on the outer periphery and sliding, the fixing rotary plate 17a and the drive gear 17 at that position.
Is configured to be held in that position.

As described above, the drive gear 17 which rotates only on the clutch pressing side is attached to the clutch lever 9 fitted on the rotation fulcrum shaft 9a so as to return to the initial upper position after pressing. A return spring 19 is connected to the plate 20 to urge it upward, and an upper stopper 20a and a lower stopper 20b are provided at the upper end position and the lower end position of the clutch lever 9 so as to project from the mounting plate 20. It is arranged so that 9 contacts. The ball fitting portions 17b and 17 into which the detent device 18 is fitted.
The positions of b ... are the upper and lower stoppers 20a, 20b.
It is set according to the pushing position (rotational angle of the clutch lever 9).

With the above structure, the clutch lever 9 is pressed against the upper stopper 20a by the urging force of the return spring 19 as the initial position, and the clutch lever 9 is pressed against the lower stopper 20b by the finger. When it is pushed downward until it is pressed, the drive gear 17 rotates by a certain amount, and the driven gear 15 rotates in proportion thereto. When the finger is released, the drive gear 17 and the driven gear 15 are held by the detent device and are left at the same positions, and the rotation fulcrum shaft 9a is freely rotated upward by the one-way clutch 16. The urging force causes the clutch lever 9 to rotate upward, press against the upper stopper 20a, and stop at the initial position.

The rotation angle θ of the clutch lever 9 is set to 60 °, and the gear ratio of the drive gear 17 and the driven gear 15 is set to 1: 3. Therefore, the driven gear 15 is rotated 180 ° while the drive gear 17 is rotated 60 ° by one pressing operation of the clutch lever 9. Therefore, two fixed positions can be set during one rotation of the driven gear 15, the position where the clutch wire 14 is pulled most is the clutch “engaged” position X, and the position where the clutch wire 14 is most loosened is the clutch “disengaged” position Y. There is. In this way, by operating the clutch lever 9 with one finger, the driven gear 15 is moved to the 1st position.
Rotate 80 °, clutch "engaged" with each finger operation
"Turn off" can be switched.

[0014]

Since the present invention is configured as described above, it has the following effects. In other words, there is only one clutch lever, and the appearance is neat, and the clutch lever can be used to "engage" and "disengage" the clutch only by pressing the finger, and lever operation by pushing up the finger is unnecessary. Therefore, the operation becomes very easy and erroneous operation can be avoided.

[Brief description of drawings]

FIG. 1 is an overall side view of a management work machine.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the clutch lever mechanism of the present invention.

FIG. 4 is a plan view of the same.

[Explanation of symbols]

 7 Handle 9 Clutch Lever 9a Rotating Support Shaft 14 Clutch Wire 15 Driven Gear 16 One-way Clutch 17 Drive Gear 17a Fixing Rotating Plate 17b Ball Fitting Part 18 Detent Device 19 Return Spring 20 Mounting Plate 20a Upper Stopper 20b Lower Stopper

Claims (1)

[Claims] 1. A main clutch lever disposed in a handle portion of a management machine, wherein a drive gear is externally fitted to a rotating shaft of the clutch lever via a one-way clutch, and a predetermined detent device is attached to the drive gear. A clutch lever for a management machine, characterized in that it can be held at a position, a driven gear is meshed with a driven gear, and an end of a clutch wire is pivotally supported by the driven gear.