JPS5865331A - Automatic clutch - Google Patents

Abstract

PURPOSE:To perform smooth engagement of a clutch, by supporting a fluid resistance member to the end part of a rod, temporarily reducing passing area of a pressure fluid outlet in a fluid hydraulic actuator through said fluid resistance member and delaying returning motion of the rod. CONSTITUTION:At speed change operation, if a switch 28 is pressed, a solenoid selector valve 5 is switched, and an inlet 24 is connected to a fluid pressure source 6, while an outlet 25 is closed. Accordingly, if fluid pressure is applied to a chamber 40, a rod 4 is moved leftward againt a spring 3 together with a diaphragm 1, and a clutch shaft 13 is turned counter clockwise together with a lever 7, then a clutch is disconnected. Then at an end of shifting operation of a speed changer if the switch 28 is opened, a diaphragm 16 and rod 2 are returned rightward by tension of the return spring 3, and a fluid resistance member 23 enters the inside of a throttle passage 39 to reduce area of the throttle passage 39 between the chamber 40 and the outlet 25, then a returning speed of the rod 2 can be delayed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to an automatic clutch in which a fluid pressure actuator is created by operating a switching valve to connect and disconnect the clutch.

Conventional automatic clutches of this type electrically control the operation of the electromagnetic control valve so that it operates quickly when disengaging and slowly when engaging, similar to when the driver operates the clutch pedal. However, such an electromagnetic control valve 1 is independent of the stroke of the fluid pressure actuator that provides the clutch &:!I actuating force.
This requires the provision of special regulating circuits in the electrical control device.

The object of the present invention is to simply replace the switch for operating the solenoid valve with
To provide an automatic clutch in which the operating speed of a fluid pressure actuator is automatically controlled in relation to the stroke and the clutch is connected to the clutch only by opening and closing.

For this reason, the configuration of the present invention is such that the clutch is connected to the rod of the hydraulic actuator, and the clutch is disconnected by supplying pressure fluid to the hydraulic actuator, and the clutch is disconnected by supplying pressure fluid to the hydraulic actuator. In an automatic clutch in which the clutch is connected by the release of fluid and the restoring force of a spring, a fluid resistance member is supported at the end of the rod, and the fluid resistance member reduces the passage pile up at the pressure fluid outlet of the fluid pressure actuator. The rod is temporarily contracted to delay the return movement of the rod.

To explain the present invention based on an embodiment, Fig. 1 shows a clutch mass-actuating mechanism. Lever 17
is adapted to abut against an annular plate surface of a release bearing 16 at this end, and this release bearing 16 is rotatably and axially connected to a front cover surrounding an input shaft (not shown) of the transmission. It is slidably supported.

In order to push the release bearing 16 in the axial direction, a shift block 15 is supported by the front cover so as to be able to rotate once relative to each other and once in the axial direction, and the shift fork 14 is brought into abutment with this forward bend. There is. The shift fork 14 is fixedly supported by the clutch shaft 13 arranged perpendicularly to the input shaft described above. An ms metal fitting 34 is connected with a pin 12 to the lever 7 fixed to the end of the clutch shaft 13, and a rod 2 of a fluid pressure actuator is connected to this metal fitting 34.

As shown in FIG. 12, the fluid pressure actuator is coupled to the opening edges of the cup-shaped divided body 19 and 20 with the edge of the diaphragm 1 sandwiched therebetween, and forms a fluid operating chamber inside the divided body 20. A return spring 3 is housed in an atmospheric pressure chamber on the side of the divided body 19, and a rod 2 passes through and is connected to a seat plate 4 connected to the center of the diaphragm 1. The left end of the rod 2 is projected to the outside through a stopper 822 fixed to the inner surface of the divided body 19, and is connected to the threaded shaft 41 of the connecting fitting 34 via the turnbuckle 30. The portion where the rod 2 passes through the split body 19 is covered by the filter 18. An inlet 24 for introducing pressure fluid is provided at a location offset from the center of the end wall of the divided body 20, and a reservoir chamber 21 is provided in the center via a throttle passage 39.
An outlet 25 is provided in the end wall of. Inlet 24 and outlet 2
5 is alternately connected (one side is connected to the fluid pressure source 6 and the other side is connected to the atmosphere) through the electromagnetic switching valve 5. This electromagnetic switching valve 5 is energized from the power source 119 by the switch 28 disposed on the speed change lever 729. When this happens, the valve body moves upward against the spring 27.

The essential structure of the present invention is that the cross-body resistance member 23 is attached to the right end of the rod 2, and is configured to pass through the throttle passage 39 during the return movement of the fluid pressure actuator.

In the embodiment shown in No. 2 IlI, the fluid resistance member 2-3u,
It has a cylindrical shape and has an outer diameter slightly smaller than the inner diameter of the aperture passage 1!39, but it may be a fluid resistance member 37 that is longer in the axial direction as shown in No. 411 or a taper as shown in FIG. By providing the fluid resistance portion 138 of the shape, the operating characteristics of the fluid pressure 7 cutuator can be reduced as desired.

Next, the operation of the device of the present invention will be explained. In FIG. 2, when the switch 28 is pressed at the beginning of the speed change operation, the electromagnetic switching valve 5 is switched from the state shown in the figure, and the input 024 is connected to the fluid pressure 116. Exit 25 is closed. Therefore, as shown in FIG. 3, the pressure hw & body (compressed air) is supplied to the chamber 40, and the rod 4 along with the diaphragm 1 moves to the left 5 against the spring 3, causing the renohes 7 and b to move. clutch shaft 13
move counterclockwise. At the iao, the release bearing 6 is pushed to the left, the clutch lever 17 is moved, and the force of the known pressure plate against the clutch disc is released.

In this way, the clutch can be quickly shut off just by operating the switch 28! i will be treated.

And lol! When the switch 28 is opened at the end of the shift operation of the l-speed machine, the electromagnetic switching valve 5 is moved by the spring 27 to the state shown in the figure S&-aδ. Therefore, the inlet 24 is shielded from the fluid pressure 116, while the outlet 25 is open to the atmosphere, and the force of the return spring 3 causes the diaphragm 16 and the rod 2 to return to the right.

At this time, as shown in No. 3 IlI, the fluid resistance *@23 enters the inside of the throttle passage 39 and reduces the passage m volume of the throttle passage 39 that connects the chamber 40 and the outlet 25. As shown by line 23A in FIG.
The return speed becomes slower.

Due to this, the release bearing 16 also returns slowly, and the shift fork 14, shift block 6 and 15, release bearing 16, and clutch lever 17 move accordingly, and the pressure plate (not shown) slowly moves the clutch disc. This will push it against the flywheel, and the clutch will connect smoothly. Then, as shown in FIG. 1, complete engagement of the clutch is achieved until the rod 2 is completely returned. Fluid resistance member 37.38
If it is constructed as shown in Fig. 4.5, the lines 37A and 37A in Fig. 6 will appear.
The return motion characteristics of the hydraulic pressure 7 cutuator as shown at 38A are obtained.

Note that an electromagnetic switching valve 31 as shown in FIG. 7 may be used instead of the electromagnetic switching valve 5, and the λ port 24 and the outlet 25 may be connected to the electromagnetic switching valve 31. In this case, a check valve 32 is inserted and connected to the passage on the inlet 24 side.

The above is an example in which compressed air is used as the fluid pressure, but the eighth example shows an example of a fluid pressure 7 cutuator that uses the negative pressure of the engine's intake manifold or the negative pressure of a vacuum pump.
The reason is shown below. In this case, a return spring 3 is interposed between the split body 20 and the spring seat 4, and a spring 3 protrudes from the side of the split body 20.
An inlet 25a is provided at each end of the air storage chamber 21.

In addition, the end of the rod 2 is connected to the relay lever 36 by holding the bottle 12.
connected to one end of the A relay lever 36 rotatably supported on the vehicle body side with a support shaft 35 is connected to the lever 7 with a pin 11 at the other end.

The other configurations are the same as the embodiment shown in FIG.
The same reference numerals are used to omit the explanation.

In the embodiment of FIG. 8, the outlet 24a is connected to a negative pressure source and -
When the inlet 25a is closed, the rod 2 together with the diaphragm 1 moves to the right against the force of the spring 3, and the lever 7 is moved in the same way as in the embodiment shown in FIG. 2, and the clutch is disengaged. Ru. During this time, the fluid resistance member 23 passes through the throttle 29 and protrudes deep into the reservoir chamber 21 .

Next, when the outlet 24a is closed and the inlet 25a is released to the atmosphere, the rod 3 moves to the left by the force of the return spring 3, and when the fluid resistance member 23 enters the throttle passage 29, the inlet 25a opens into the chamber. The flow resistance of the atmosphere flowing to 40 increases,
The moving speed of the rod 2 increases, and smooth connection of the clutch is achieved.

As described above, in the present invention, the clutch lever 17 for connecting and disconnecting the clutch is connected to the rod 2 of the fluid pressure actuator.
Since the rod 2 is provided with the fluid resistance member 23, the operating speed can be changed in relation to the stroke of the rod 2. That is, when the clutch is engaged, the clutch is operated quickly at first and then gradually slowed down to achieve a smooth latch connection. The connecting operation of the clutch and the synchronization of the fluid resistance section 123 can be easily adjusted by using the turnbuckle 30 to adjust the length of the connection of the rod 2 to the connecting fitting 14, and even when the clutch disc is worn out. Although the configuration is simple, excellent results can be obtained in that it can be easily readjusted.

[Brief explanation of the drawing]

1g4 is a perspective view showing a schematic configuration of an operating mechanism of an automatic clutch according to the present invention, FIG. 2 is a 9-side sectional view of a fluid pressure actuator in the same clutch, and FIG. 4 and 5 are side sectional views showing modified embodiments of the fluid resistance member, FIG. 6 is a miniature diagram showing the operating characteristics of the fluid resistance member, and FIG. 7 is a diagram showing the fluid resistance member 7. A circuit diagram showing another embodiment of the electromagnetic switching valve used in the actuator, and FIG. 8 is a side sectional view of another embodiment of the fluid pressure actuator. 1: Diaphragm 2: Rod 3: Return spring 5. 31
: Solenoid switching valve 6: Fluid pressure II 13: Clutch shaft 23.37.38: Fluid resistance member 24: Inlet 25: Outlet 28: Switch 29: Shift lever 30
:Turnbuckle patent applicant Isuzu Tol! Daisanjin Co., Ltd. Patent Attorney Toshio Yamamoto 10- -170→ v'i 4 Figure 6gl

Claims (1)

[Claims] A control lever that connects or disconnects the clutch is connected to the rod of the fluid pressure 7 actuator, disconnects the clutch by supplying pressure fluid to the am body pressure actuator, and releases the pressure fluid and the restoring force of the spring to close the clutch. In the automatic clutch configured to connect, a fluid resistance member is supported at the end of the rod, and the passage area of the pressure fluid outlet of the fluid pressure cutter is temporarily summarized by the cough fluid resistance member, and the An automatic clutch characterized by delayed return movement.