JPS61256027A - Automatic clutch - Google Patents

Abstract

PURPOSE:To connect the clutch quickly thus to shorten the time required for speed change operation by temporarily opening the exhaust valve until start of returning stroke upon finish of going stroke of actuator thereby discharging the excessive pressure of actuator during gear change. CONSTITUTION:A solenoid feed valve 7 is opened to cause go stroke of actuator 1 thus to disconnect the clutch through a clutch lever 5. While completion of go stroke is detected through a stroke sensor 11 to close said valve 7 through a controller 10 while to open a solenoid exhaust valve 8. Upon droppage of pressure in a pressure chamber 6 to predetermined level, said valve 8 is closed by the signal from the stroke stroke sensor 11 to execute gear change and upon finish of gear change, said valve 8 is opened by the signal from a gear sensor 12 thus to connect the clutch. Consequently, the clutch is connected quickly upon finish of gear change resulting in shortening of the time required for speed change operation.

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to an automatic clutch device, and in particular, it eliminates return delay caused by hysteresis such as frictional resistance of the clutch body, thereby enabling speedy latch connection. Related to automatic clutch device.

b. Conventional technology In conventional automatic clutch devices, driving pressure is supplied to the actuator for clutch operation to move this actuator forward, and when the forward movement of the actuator is completed and the clutch is disengaged, driving pressure is supplied. After the gear change is completed, the drive pressure is exhausted from the actuator, the actuator is moved back, and the clutch is connected.

C0 Problem to be solved by the invention By the way, since the relationship between the drive pressure and the stroke of the actuator has a hysteresis characteristic as shown in FIG. Even if you start exhausting the drive pressure after completing the switching,
From to B, the stroke of the actuator hardly changes, and the time loss during this period increases the overall time required for the gear shifting operation.

The present invention has been devised in view of the above circumstances, and its purpose is to provide an automatic clutch device that can quickly connect a latch.

The gist of the present invention is to provide an automatic clutch device that connects and disconnects a clutch by reciprocating an actuator; A stroke sensor detects the completion of the forward movement and the start of the backward movement of the actuator; (c) a gear sensor detects the completion of gear switching of the transmission; and (d) the detection signals of the stroke sensor and gear sensor are respectively inputted, and the A command to exhaust the drive pressure is issued to the control valve based on a forward motion completion signal from the stroke sensor, and a command to stop exhausting the drive pressure is issued to the control valve based on a backward motion start signal from the stroke sensor. and a controller that issues again an exhaust command for the drive pressure to the control valve based on a gear change completion signal from the gear sensor.

Means to solve the d0 problem An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, 1 is an actuator for clutch operation, and a power piston 13 and a piston rod 2 of this actuator 1 are connected to a relay piston 3 and a connecting rod 4.
It is connected to the clutch lever 5 via. The pressure chamber 6 of the actuator 1 is provided with a spring 14 that urges the power piston 13 in the forward direction and keeps the release bearing of the clutch body in constant contact with the release lever. 7 and an exhaust solenoid valve 8, and when the supply solenoid valve 7 is turned on, compressed air as the driving pressure in the air tank 9 is supplied to the pressure chamber 6 of the actuator 1, and on the other hand, the exhaust solenoid valve 8 is connected to the pressure chamber 6 of the actuator 1. When turned on, the compressed air in the pressure chamber 6 of the actuator 1 is discharged to the outside.

The supply solenoid valve 7 and the exhaust solenoid valve 8 are each controlled by a controller IO. A detection signal from a stroke sensor 11, which detects the completion of forward movement and the start of backward movement of the actuator 1, and a detection signal from a gear sensor 12, which detects the completion of gear switching of the transmission, are respectively input to the controller 10. There is.

Then, based on the forward movement completion signal of the stroke sensor 11, the supply solenoid valve 7 is turned OFF, and the exhaust solenoid valve 8 is turned ON, and based on the backward movement start signal of the stroke sensor 11, the exhaust solenoid valve 8 is temporarily turned OFF. and the exhaust electromagnetic valve 8 is turned ON again based on the gear change completion signal from the gear sensor 12.

Note that the clutch engagement/disengagement position will shift due to wear of the clutch plate, but by learning the half-clutch position when starting the engine and storing it in the controller 10,
The stroke sensor 11 can always accurately detect engagement and disengagement of the clutch.

The automatic clutch device for operation 03 is constructed as described above, and operates as follows when changing gears of the transmission. First, the supply solenoid valve 7 is turned on by a signal from the controller 10, and compressed air from the air tank 9 is supplied to the pressure chamber 6 of the actuator 1. When compressed air is supplied to the pressure chamber 6, the piston rod 2 of the actuator 1 moves forward in the right direction in Figure 1, and the clutch lever 5 is rotated counterclockwise in the figure to disengage the clutch. It will be done.

When the forward movement of the actuator l is completed (at point A in FIG. 2), the stroke sensor 11 detects this state, and this forward movement completion signal is input to the controller 10, and the supply solenoid valve 7 is turned off. At the same time, the exhaust solenoid valve 8 is turned on.
The compressed air in the pressure chamber 6 of the actuator 1 begins to be discharged to the outside. On the other hand, the forward movement completion signal from the stroke sensor 11 is also transmitted to the operation system of the transmission (not shown), and gear switching is started.

When the pressure in the pressure chamber 6 of the actuator 1 decreases to a constant pressure, the actuator 1 starts to move backward (as indicated by B in Fig. 2).
point), the start of this double movement immediately triggers the stroke sensor 1.
1, and this backward movement start signal is input to the controller 10 and the exhaust solenoid valve 8 is turned off. As a result, the actuator l is held in the forward movement state, and during this time the gear of the transmission is changed.

When the gear change of the transmission is completed, this state is detected by the gear sensor 12, this gear change completion signal is input to the controller 10, and the exhaust electromagnetic valve 8 is turned ON again. As a result, the compressed air in the pressure chamber 6 of the actuator 1 is discharged to the outside again, the actuator 1 moves back, and the clutch is connected.

In this manner, the automatic clutch device according to the present invention exhausts the excess pressure in the pressure chamber 6 of the actuator 1 while the gear change of the transmission is being performed, and exhausts the compressed air in the pressure chamber 6 after the gear change is completed. Since the double movement of the actuator 1 is started at the same time as the air is exhausted, the clutch can be connected quickly.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be modified in various ways. For example, in the above embodiment, the stroke sensor 11 is attached to the clutch lever 5, but this stroke sensor 11 is attached to the connecting rod 4, piston rod 2, etc. power piston 13
It is also possible to install it on Further, in the above embodiment, two solenoid valves 7.8 for supply and exhaust are used, but it is also possible to configure the valve with a three-bottom, three-position switching valve.

10 Effects of the Invention As described above, after the actuator is moved forward,
The system immediately starts discharging the compressed air in the pressure chamber to the outside, temporarily stops discharging the compressed air when the actuator starts to move backward, and discharges the compressed air again as soon as the transmission gear change is completed. Since the actuator is designed to move backward, it is possible to quickly connect the latch by eliminating the backward movement delay caused by hysteresis due to frictional resistance of the clutch body, etc., and significantly reduce the overall time required for shifting operations. Can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an automatic clutch device showing an embodiment of the present invention, and FIG. 2 is a pressure-stroke characteristic curve diagram of an actuator. DESCRIPTION OF SYMBOLS 1... Actuator, 5... Taranotile lever, 7... Solenoid valve for supply, 8... Solenoid valve for exhaust, 10... Controller, 11... Stroke sensor.

Claims (1)

[Scope of Claims] An automatic clutch device that connects and disconnects a clutch by reciprocating an actuator, comprising: (a) a control valve that controls supply and discharge of driving pressure to and from the actuator; A stroke sensor detects the completion of forward movement and the start of backward movement; (c) A gear sensor detects the completion of gear switching of the transmission; (d) The detection signals of the stroke sensor and gear sensor are respectively inputted, and the stroke sensor Based on the motion completion signal, a command to exhaust the drive pressure is issued to the control valve, and a command to stop exhausting the drive pressure is issued to the control valve based on the double motion start signal of the stroke sensor, and the gear sensor An automatic clutch device comprising: a controller that again issues an exhaust command for the drive pressure to the control valve based on a gear change completion signal;