JPH0723618Y2 - Clutch actuator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a clutch actuating device for smoothly engaging a clutch.

[Prior Art] A clutch operating mechanism in a conventional boring machine will be described with reference to FIG. First, when the clutch is disengaged, when the clutch release shaft 1 directly connected to the lever is rotated by rotating the clutch lever (not shown), the clutch fork 9 moves left and right, which causes the bearing 8 to move. The clutch lever 2 is rotated clockwise around the fulcrum 2a through the second fulcrum 2b.
Is moved rightward, the pressure plate 3 is moved rightward against the acting force of the spring 4. As a result, the flywheel 5 and the clutch disc 6 are separated from each other, and the transmission of power is cut off. When connecting the clutch, if the clutch lever is rotated in the opposite direction to the above, the force of the spring 4 causes the clutch lever 2 to rotate counterclockwise and the pressure plate 3 to the left. The clutch disc 6 is moved and pressed against the flywheel 5, whereby power is transmitted.

[Problems to be Solved by the Invention] However, in the above-described configuration, when the clutch lever is normally rotated when the clutch is connected, the stationary flywheel 5 and the stationary clutch disc 6 move to the spring 4. Since they are instantly pressed by the acting force, there is a problem that a sudden load is applied to both of them, they are easily damaged, and wear is fast, so it was necessary to slowly rotate the clutch lever and slowly connect it.

When the clutch in the rotating state is disengaged, the clutch lever is normally disengaged so that the flywheel 5 rotating together.
Since there is a problem that friction occurs when the clutch disk 6 and the clutch disk 6 separate from each other and wear is fast, it is necessary to rapidly rotate the clutch lever to rapidly disengage the clutch. However, it takes time to get used to the above operation, and the operation of the clutch lever is often mistaken.

The present invention has been made in view of the above circumstances, and is capable of softening a shock at the time of clutch engagement and disengagement to prevent damage and wear, and a clutch actuation device having a new interlocking mechanism of a clutch lever and a piston. Is provided.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a clutch release shaft and a clutch by rotating a clutch lever to rotate a pressure plate that is always urged in a clutch connecting direction by a clutch spring. The lever is moved so that the clutch disc is pressed against and separated from the flywheel, and fluid pressure is filled between the clutch lever and the clutch release arm fixed to the clutch release shaft. A piston that reciprocates in conjunction with a clutch lever is interposed in the cylinder, and a relatively large fluid hole provided with a check valve that operates when the clutch is connected to the piston and an orifice that imparts resistance to the fluid, or the orifice. Instead of a bypass pipe equipped with a throttle valve outside the cylinder In girder clutch, and the clutch lever and the piston is characterized in that it is linked via the abutting roller cam and the cam.

[Operation] When the clutch is engaged and the clutch lever is rotated in one direction, the piston moves due to the acting force of the spring. In that case, the steel ball in the fluid hole acts as a check valve, so the fluid passes through the orifice only. To do. Therefore, since the piston moves slowly due to the resistance of the fluid passing through the orifice, the pressure plate also moves slowly. As a result, the clutch disc is also gently pressed against the flywheel, the shock at the time of connection is relieved, damage is avoided, and wear of both is reduced.

Further, by providing a bypass pipe having an adjustable throttle valve instead of the orifice, the speed at which the clutch disc is pressed against the flywheel can be appropriately adjusted.

When the clutch lever is turned in the other direction when the clutch is disengaged, the piston moves against the elastic force of the spring, but in that case, the check valve does not work, so the fluid flows through the relatively large fluid hole. Moves. Therefore, since the piston moves rapidly, the pressure plate also moves rapidly.

Further, since the clutch lever and the piston are interlocked via the cam and the roller that abuts on the cam, the operation of the clutch lever is smoothly transmitted to the piston.

[Embodiment] Hereinafter, the present invention will be described in detail with reference to the illustrated embodiment.

1 and 2 are a front sectional view and a side view showing an embodiment of the present invention. In the figure, 10 is a machine equipped with a clutch, and a side bracket 11 of the machine 10 has a cam 13 integrally formed at the lower end of a clutch lever 12 and the center of which is pivotally mounted.
A cylinder 14 accommodating a piston 15 is fixed to a bracket 20 below it. An orifice 16 is provided on one side of the piston 15, and a large-diameter fluid hole 18 provided with a steel ball 17 as a check valve is provided on the other side in the vertical direction. Further, a roller 19 with which the concave portion 13a provided in the cam 13 is engaged is attached to the upper end of the piston 15,
A bolt 21 is fixed to the lower end. Reference numeral 22 denotes a clutch release arm fixed to one end of the clutch release shaft 1, the upper surface of one end of which is in contact with the head 21a of the bolt 21. The clutch fork 9 of the known clutch device shown in FIG. 5 is attached to the other end of the clutch release shaft 1. The cylinder
A fluid 23 such as oil, air, or glycerin is filled in the inside 14.

The operation of the above device will be described. FIGS. 1 and 2 show the state when the clutch is engaged. To disengage the clutch from this state, when the clutch lever 12 is rotated, the cam 13 rides on the roller 19 at the upper end of the piston 15, so that the piston 15 moves. When pushed down, the head 21a of the bolt 21 at the lower end rotates the clutch release arm 22 in the clockwise direction in FIG. As a result, the clutch release shaft 1 also rotates in the same direction, so that the clutch fork 9 shown in FIG. 5 rotates counterclockwise and pushes the lower end 2c of the clutch lever 2 through the bearing 8, so that the clutch lever 2 supports the fulcrum 2a. The pressure plate 3 attached to the second fulcrum 2b by rotating clockwise around
Is moved to the right against the acting force of the spring 4. As a result, the flywheel 5 and the clutch disc 6 are separated from each other, and the transmission of power is cut off.

When the piston 15 descends, the fluid 23 mainly passes through the large-diameter fluid hole 18 with almost no resistance, so that the piston 15 is pushed down according to the operation speed of the clutch lever 12. Therefore, the clutch is immediately disengaged.

Next, when connecting the clutch, rotate the clutch lever 12 in the direction opposite to the above direction to move the
Since the concave portion 13a of 13 is formed, the piston 15 is moved up by the acting force of the spring 4 shown in FIG. On the other hand, the clutch lever 2 rotates counterclockwise and the pressure plate 3
Moves to the left and presses the clutch disc 6 against the flywheel 5, whereby power is transmitted.

Although the piston 15 rises via the clutch release shaft 1 and the clutch release arm 22, the fluid hole 18
The steel balls 17 of the
23 passes through orifice 16 only. Therefore, the piston 15
Rises slowly due to the resistance of its fluid 23. Therefore, since the pressure plate 3 is moved slowly, the clutch disc 6 is also gently pressed against the flywheel 5, the shock at the time of connection is relieved, damage is avoided, and wear of both is reduced.

3 and 4 are a front sectional view and a side view showing another embodiment. In this embodiment, a bypass pipe 25 is provided outside the cylinder 14 instead of providing the orifice 16 in the piston 15a. A throttle valve 26 is attached in the middle of the bypass pipe 25. By adjusting the opening amount of the throttle valve 26, the speed at which the piston 15a rises when the clutch is engaged, and the speed at which the clutch disc 6 is pressed against the flywheel 5 can be adjusted appropriately.

[Effects of the Invention] As described above, according to the present invention, the clutch is slowly connected at the time of engagement and rapidly disengaged at the time of engagement by simply operating the clutch lever normally, so that the clutch device is prevented from being damaged. In addition, the wear of the clutch disc and the flywheel can be reduced.

Moreover, according to the present invention, since the clutch lever and the piston are interlocked via the cam and the roller that abuts on the cam, the operation of the clutch lever is smoothly transmitted to the piston.

[Brief description of drawings]

1 is a front sectional view showing an embodiment of the present invention, FIG. 2 is a side sectional view of the same, FIG. 3 is a front sectional view of another embodiment of the present invention, FIG. FIG. 1 is a sectional view showing an example of a conventional clutch. 1 ... Clutch release shaft, 2 ... Clutch lever, 2a ... Support point, 2b ... Second support point, 3 ... Pressure plate, 4 ... Spring, 5 ... Flywheel,
6 ... Clutch disk, 8 ... Bearing, 9 ... Clutch forked, 10 ... Machine, 12 ... Clutch lever, 13 ...
… Cam, 14 …… Cylinder, 15,15a …… Piston, 16 ……
Orifice, 17 …… Steel ball, 18 …… Fluid hole, 19
...... Roller, 22 …… Clutch release arm, 23 …… Fluid, 25 …… Bypass pipe, 26 …… Throttle valve.

Claims (1)

[Scope of utility model registration request] 1. A pressure plate, which is always urged in the clutch connecting direction by a spring of a clutch, is moved by a clutch release shaft and a clutch lever by rotating a clutch lever, whereby a clutch disc is flywheel. And a piston that reciprocates in the cylinder filled with fluid pressure in conjunction with the clutch lever between the clutch lever and the clutch release arm fixed to the clutch release shaft. The piston is provided with a relatively large fluid hole provided with a check valve that operates when the clutch is engaged and an orifice for providing resistance to the fluid, or a bypass pipe provided with a throttle valve outside the cylinder instead of the orifice. In the clutch, the clutch lever and the piston The emission, the clutch actuating device, characterized by being linked through the abutting roller cam and the cam.