JPH0667929U - Clutch device - Google Patents

Abstract

(57) [Abstract] [Purpose] The clutch booster is easily activated when the air fails, and the driver is not burdened. A line L2 connected to a line L1 applied to the clutch booster 3 from the auxiliary air source 20 via a check valve 24 is provided, and the line L2 is connected to the clutch booster 3 via a switching valve 21 and a double check valve 23. Connected

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clutch device for a mechanical electronically controlled transmission.

[0002]

[Prior art]

 A conventional clutch device will be described with reference to FIG. That is, the conventional clutch device includes a master cylinder 2 attached to a clutch pedal 1, a clutch booster 3, a push rod 9 driven by the clutch booster 3, an outer lever 10, a clutch stroke sensor 11 operated by the outer lever 10, and further. A line L1 connecting the air reservoir 6 and the inlet of the relay valve 5 of the clutch booster 3 and a line L3 branching from the line L1 to the valve V1 via the switching valve V2, and from the valve V1 to the cylinder 7 of the clutch booster 3. It has a line L4 that is connected and a line L5 that connects the valve V1 to the outlet of the relay valve 5 of the clutch booster 3. The valve V1 has a built-in plunger that moves according to the difference in air pressure from the opposite inlets, and the air with the higher pressure flows out from the outlet. When the clutch pedal 1 is stepped on, the hydraulic pressure generated by the master cylinder 2 urges the relay valve 5 so that the pressurized air from the air reservoir 6 opens the relay valve 5 via the line L1 and opens the plunger of the valve 1 via the line L5. Since it is lowered in the figure and flows into the cylinder 7 of the clutch booster 3 through the line L4 to move the piston 8 rightward in the figure, there is almost no physical burden on the driver.

At the time of air failure, the air pressure in the line L1 drops, so the pressure in the cylinder 7 drops, and the piston 8 moves to the left in the figure to rotate the outer lever 10 via the push rod 9 to cause the clutch stroke sensor 11 to move. It will be activated and the clutch will be engaged.

When the clutch pedal 1 is depressed to disengage the clutch in the event of air failure, pressure oil from the master cylinder 2 flows as shown by an arrow C and enters the hydraulic cylinder 4 of the clutch booster 3 and the piston. Since 8 moves to the right in the figure, the clutch outer lever 10 is rotated via the push rod 9.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional clutch device, the hydraulic pressure by the master cylinder 2 must be used by stepping on the clutch pedal 1 at the time of so-called air failure such that the pressure air cannot be obtained above a certain value. In order to increase the force applied to the hydraulic piston 12 having a small area to move the push rod 9 to the right in the figure, it is necessary to step on the clutch pedal 1 with a large force to increase the hydraulic pressure. In Japanese Utility Model Laid-Open No. 60-189626 published by the present applicant, there is disclosed a technique of providing a means capable of manually expanding and contracting the length of a push rod. It is necessary, time consuming and impractical.

An object of the present invention is to provide a clutch device that easily operates a clutch booster when air fails and does not burden the driver.

[0007]

[Means for Solving the Problems]

 According to the present invention, a clutch device provided with a line L1 for applying pressure oil to a relay valve by operating a clutch pedal and applying air from an air reservoir to a clutch booster by operating the relay valve is checked from an auxiliary air source. A line L2 connected to a line applied to the clutch booster via a valve is provided, and the line L2 is further connected to the clutch booster via a switching valve and a double check valve.

[0008]

[Action]

 According to the clutch device configured as described above, since the clutch booster is applied from the auxiliary air source through the line L2 having the check valve interposed, the clutch booster can be activated by activating the auxiliary air source. Operates to rotate the outer lever. Furthermore, since the line L2 is connected to the clutch booster through the switching valve and the double check valve, the pressure air from the auxiliary air source is directly clutched through the double check valve by operating the switching valve. The booster can be activated.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention, but the same reference numerals are given to the conventional configuration and the description thereof will be omitted.

The present apparatus comprises an auxiliary air source 20, a switching valve 21, a double check valve 23, and check valves 24 and 25 in addition to the conventional structure, and also includes new installation and modification of the line. Specifically, a line L2 is provided between the auxiliary air source 20 and the existing line L1, and a check valve 25 that flows only in the arrow F is provided between the air reservoir 6 at the junction X between the line L1 and the line L2. The line L2 is provided with a check valve 24 which is close to the auxiliary air source 20 and flows only in the arrow G. The portion of the joint X and the diaphragm booster 3 of the clutch booster 3 will be referred to as a line L11. The branch line L21 from the line L2 is connected to the double check valve 23 via the switching valve 21. Lines L41 and 42 are provided between the double check valve 23 and the existing valve V1 and the cylinder 7 of the clutch booster 3, respectively. The auxiliary air source 20 and the switching valve 21 are activated by turning on the switches SW1 and SW2, respectively.

The operation of this device will be described with reference to FIG.

There are two methods of disengaging the clutch when the air fails, that is, a manual operation and an automatic method.

In the case of automatic operation, when the switches SW1 and SW2 are turned on to operate the auxiliary air source 20 and the switching valve 21, respectively, pressurized air is generated in the line L2, and the plunger of the switching valve 21 is raised in the figure. As a result, the pressurized air enters the line L21 through the check valve 24 and the switching valve 21, raises the double check valve 23 in the figure, flows into the cylinder 7 of the clutch booster 3 through the line L42, and the piston 8 Move it to the middle right and rotate the outer lever 10 counterclockwise in the figure to disengage the clutch. Therefore, the pressurized air can be quickly obtained by the operation of the auxiliary air source 20.

In the case of a manual operation, if SW1 is turned on while SW2 is kept off, compressed air is generated in the line L2, so that normal air assist is possible and the driver's burden is light. That is, the pressurized air flows into the line L 11 by the check valve 25, while the hydraulic pressure produced by the master cylinder 2 by depressing the clutch pedal 1 causes the relay piston 13 to move to the right in the figure and opens the diaphragm valve 5. The pressurized air flows through line L5 to lower the plunger in valve V1 in the figure to flow into line L41, and further moves down the plunger in double check valve 23 in the figure to flow into cylinder 7 via line L42.

[0016]

[Effect of device]

 Since the present invention is configured as described above, the clutch can be disengaged without any physical burden on the driver, regardless of whether the operation at the time of failure is manual operation or automatic operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment according to the present invention.

FIG. 2 is a configuration diagram showing a conventional clutch device.

[Explanation of symbols]

1 ... Clutch pedal 2 ... Master cylinder 3 ... Clutch booster 4 ... Hydraulic cylinder 5 ... Relay valve 6 ... Air reservoir 7 ... Cylinder 8 ... Piston 9 ... Push rod 10 ... Outer lever 11 ... Clutch stroke sensor 12 ... Hydraulic piston 20 ... Auxiliary air source 21 ... Switching valve 23 ... Double check valve 24, 25 ... Check valve A, B, C, D, E, F, G ... Arrows L1, L11, L2, L3, L4, L41, L42, L
5 ... line SW1, SW2 ... switch V1 ... valve V2 ... switching valve X, Y ... junction

Claims (1)

[Scope of utility model registration request] 1. A line L for applying pressure oil to a relay valve by operating a clutch pedal and applying air from an air reservoir to a clutch booster by operating the relay valve.
In the clutch device provided with 1, a line L2 connected to a line applied to the clutch booster from an auxiliary air source via a check valve is provided, and the line L2 is connected to the clutch booster via a switching valve and a double check valve. A clutch device characterized by being connected.