JP3635334B2 - Auto clutch device for vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in an automatic clutch device for a vehicle that can also be operated manually.
[0002]
[Prior art]
An automatic transmission that electronically automatically shifts a transmission according to an operating state such as an engine speed, an accelerator opening degree, a vehicle speed, etc., and automatically connects and disconnects a mechanical friction clutch to control a vehicle is well known. In such an automatic transmission, an automatic transmission for a vehicle in which the mechanical friction clutch can be manually operated is known from, for example, Japanese Utility Model Publication No. 4-8023.
That is, the automatic transmission described in the above publication is suitable for starting under special conditions such as starting over obstacles, starting on a steep slope, starting on a snowy road, etc., which cannot handle the connection / disconnection control of the friction clutch and cannot start. In such special conditions, the automatic clutch control is stopped and the clutch can be connected / disconnected by manual operation. This is output to the control system of the automatic transmission during gear shifting. A means for shutting off the clutch operating signal when the clutch pedal is depressed, a control valve for supplying hydraulic fluid to the clutch booster (actuator such as a slave cylinder) in response to the clutch pedal, and a hydraulic fluid selected for the booster It is equipped with a double check valve that feeds automatically.
[0003]
On the other hand, the transmission is operated manually, and only the clutch is basically connected / disconnected automatically (automatically) according to the shifting state and the driving state. An automatic clutch device such as that shown in FIG. 3 that can be manually operated at this time has been put into practical use.
That is, this device rotates with a as a fulcrum, the lower end of which is connected to the upper end of the clutch release fork 3 that pushes the release bearing 2 of the friction clutch 1, and the booster mechanism 6 that operates when the clutch pedal 5 is depressed. A manual operation hydraulic oil supply mechanism 10 including a master cylinder 8 having an oil tank 7 and a hydraulic oil pipe 9 connected to the cylinder 8 is connected by an oil tank 11 and a pipe 12 and is driven by a motor 13. A gear pump 14, a hydraulic oil pipe 16 connected to the gear pump 14 via a check valve 15, a relief valve 18 provided in a pipe 17 extending between the gear pump 14 and the check valve 15 to the oil tank 11, and the Automatic operation comprising a solenoid valve 20 provided in a return line 19 from the hydraulic oil line 16 to the oil tank 11 It consists hydraulic oil supply mechanism 21, which are connected via line 23 to the slave cylinder 4 via the switching mechanism 22 and the two hydraulic fluid pipeline 9 and 16.
As the switching mechanism 22, for example, an electromagnetic switching valve 22 ′ as shown in FIG. 4 is used. The hydraulic oil line 9 of the manual operation hydraulic oil supply mechanism 10 and the hydraulic oil line of the automatic operation hydraulic oil supply mechanism 21 are used. 16 is connected to the slave cylinder 4.
[0004]
With the above configuration, when the operation of the friction clutch 1 is switched from manual operation to automatic operation, for example, the switching mechanism 22 (electromagnetic switching valve 22 ') is switched manually or automatically to the automatic side, and the gear 13 is driven by the motor 13. 14, the hydraulic oil opens the check valve 15, enters the slave cylinder 4 via the hydraulic oil line 16 and the switching mechanism 22 (electromagnetic switching valve 22 ′) via the pipe line 23, and moves the piston 4 a to the right in FIG. 3. As a result, the clutch release fork 3 rotates clockwise around the fulcrum a, and the release bearing 2 is pushed to the left to disengage the friction clutch 1. When it is detected by a position sensor (not shown) provided in the slave cylinder 4 that the piston 4a has moved a predetermined stroke, the power to the motor 13 is turned off and the rotation of the pump 14 is stopped.
After the power supply to the motor 13 is cut off and the gear pump 14 is stopped, if the solenoid valve 20 is opened while controlling to return the hydraulic oil, the hydraulic oil in the slave cylinder 4 is caused by the spring in the friction clutch 1. When the piston 4 a returns through the release bearing 2 and the clutch release fork 3, it returns from the pipe 23 and the hydraulic oil pipe 16 through the return pipe 19 to the oil tank 11 through the electromagnetic valve 20. As a result, the friction clutch 1 becomes “contact”.
[0005]
Similarly, when the switching mechanism 22 is manually or automatically switched to manual, for example, the switching mechanism 22, that is, the electromagnetic switching valve 22 'is switched to the manual side as shown in FIG. Then, the booster mechanism 6 is operated, the piston 8a in the master cylinder 8 is moved to the left in FIG. 3, and the hydraulic oil is passed through the hydraulic oil line 9 and the switching mechanism 22 (electromagnetic switching valve 22 ′) to form the pipe line 23. 2 and the piston 4a is pushed to the right in FIG. 2, whereby the clutch release fork 3 is rotated clockwise around the fulcrum a, and the release bearing 2 is pushed to the left to move the friction clutch 1 to “ ”
When the clutch pedal 5 is returned, the piston 8a in the master cylinder 8 returns to the right in FIG. 3 by the spring in the cylinder 8 and the booster mechanism 6, and at the same time, the release bearing 2 and clutch by the spring in the friction clutch 1 By the return of the piston 4 a through the release fork 3, the hydraulic oil in the slave cylinder 4 returns through the pipe line 23 and the hydraulic oil pipe 9 and returns to the oil tank 7 through the master cylinder 8. As a result, the friction clutch 1 becomes “contact”.
[0006]
In the meantime, in the case of operating with hydraulic oil such as that shown in FIG. 3, it has been found that there is the following problem when the electromagnetic switching valve 22 ′ is used as the switching mechanism as shown in FIG.
(1) Unbalance of hydraulic oil amount in both hydraulic oil supply mechanisms Switching between the automatic operation and manual operation is performed when the friction clutch 1 is “contact”, that is, the piston 4a of the slave cylinder 4 is at the left end in FIG. When there is no hydraulic oil in the slave cylinder 4, no hydraulic oil flows between the hydraulic oil supply mechanisms 10 and 21 and no malfunction occurs. However, when the clutch 1 is "disengaged", that is, the slave When the switching is performed when the piston 4a of the cylinder 4 is at the position in the drawing in FIG. 3 or to the right of the cylinder 4 and the slave cylinder 4 is filled with the hydraulic oil, the operation is performed between the hydraulic oil supply mechanisms 10 and 21. There is a problem in that oil flows and one of the oil tanks 7 and 11 overflows and the other becomes empty.
[0007]
For example, after depressing the clutch pedal 5 and disengaging the friction clutch 1 (at this time, the slave cylinder 4 is filled with hydraulic fluid from the oil tank 7), the electromagnetic switching valve 22 ′ is switched to auto. The pipe line 23 connected to the slave cylinder 4 is disconnected from the hydraulic oil pipe line 9 connected to the oil tank 7 and is connected to the return pipe line 19 of the automatic operation hydraulic oil supply mechanism 21.
Therefore, when the solenoid valve 20 is opened as described above in this state, the hydraulic oil in the slave cylinder 4 flows to the oil tank 11 through the return pipe 19, and the friction clutch 1 is "contacted". This phenomenon means that the hydraulic oil in the oil tank 7 is returned to the oil tank 11, and when the above operation is repeated many times, the oil tank 7 is finally emptied as described above. An event in which hydraulic oil overflows from the tank 11 can occur.
[0008]
(2) Rapid start of vehicle when switching from auto operation to manual operation As described above, there is no problem when switching from auto operation to manual operation when the friction clutch 1 is “engaged”. If the clutch 1 is switched to manual operation by the electromagnetic switching valve 22 ', the master cylinder 8 and the oil tank 7 are in communication when the clutch pedal 5 is not depressed. All of the hydraulic oil returns to the oil tank 7 via the pipe line 23, the electromagnetic switching valve 22 'and the hydraulic oil pipe line 9. As a result, the friction clutch 1 suddenly becomes "contact", and at this time, the gear of the transmission changes. If so, the vehicle may start suddenly.
[0009]
Various measures for preventing the occurrence of the above situation are conceivable. However, the modification of the master cylinder 8 is difficult due to air bleeding, difficulty in dealing with the wear of the clutch, and high cost. It is difficult to integrate the oil tanks 7 and 11 in 10 and 21 due to the positional constraints of both. In consideration of the above points and backup in the event of an electronic system failure, an auto clutch device for a vehicle as shown in FIGS. 5 and 6 has been considered.
5 includes a slave cylinder 4 that connects and disconnects the friction clutch 1, and an automatic operation hydraulic oil supply mechanism 21 that operates by a pump 14 and a manual operation operation that operates by a clutch pedal 5 with respect to the cylinder 4. in the automatic clutch device for a vehicle adapted to selectively actuate the oil supply mechanism 10, between the hydraulic fluid pipeline 9 and the automatic operation for the hydraulic oil supply mechanism 21 of the manual operation for the hydraulic oil supply mechanism 10, A switching cylinder 30 having a piston 33 biased by a spring 32 is disposed at one end of the cylinder 31 and the manual operation hydraulic fluid is supplied to the one end of the cylinder 30 on the piston 33 side. the hydraulic fluid pipeline 9 of the mechanism 10, also opposite to the spring 32 side of the end portion in the automatic operation for the hydraulic oil supply mechanism 21 and the slave Which are connected a conduit 23 Linda 4 each. In FIG. 5, the same reference numerals as those in FIG. 3 denote the same members.
[0010]
With such a configuration, when the operation of the friction clutch 1 is switched from manual operation to automatic operation, for example, in the vehicle auto clutch device of FIG. 5, the motor 13 is turned on manually or automatically. When the gear pump 14 is driven, the hydraulic oil opens the check valve 15 and enters the slave cylinder 4 through the hydraulic oil pipe 16 and the pipe 23, and pushes the piston 4a to the right in FIG. The friction clutch is “disengaged” through the release bearing. At this time, the spring 32 side of the cylinder 31 of the switching cylinder 30 has the same pressure as the inside of the pipe line 16, and there is no problem just by pressing the piston 33 against the one end 31a of the cylinder 31.
[0011]
If the electromagnetic valve 20 is controlled and opened to control the return speed of hydraulic oil after the power to the motor 13 is cut off and the gear pump 14 is stopped, the hydraulic oil in the slave cylinder 4 is caused by the spring in the friction clutch 1. Returning the piston 4a through the release bearing and the clutch release fork returns from the pipe 23 and the hydraulic oil pipe 16 to the oil tank 11 through the return pipe 19 and the electromagnetic valve 20. As a result, the friction clutch 1 becomes “contact”.
[0012]
When switching from auto operation to manual operation, if the clutch pedal 5 is depressed with the power to the motor 13 turned off, the piston 8a in the master cylinder 8 moves to the left in FIG. It is press-fitted into the cylinder 31 from the one end 31 a of the cylinder 31 in the switching cylinder 30 through the oil pipe 9.
As a result, the piston 33 moves to the left against the spring 32 in the cylinder 31, and the hydraulic oil on the spring 32 side of the cylinder 31 is pushed out to the hydraulic oil pipe 16 and the pipe 23. However, since the hydraulic oil pipe 16 side is shut off by the check valve 15 and the electromagnetic valve 20, the entire amount eventually enters the slave cylinder 4 through the pipe 23 and pushes the piston 4a to the right in FIG. In the same manner as described above, the friction clutch is "disengaged" through the clutch release fork and the release bearing.
[0013]
When the clutch pedal 5 is returned, the piston 8a in the master cylinder 8 is returned to the right in FIG. 5 by the spring of the cylinder 8 and the like, and at the same time, the release bearing and the clutch release fork by the spring in the friction clutch 1 are used. By the return of the piston 4a, the hydraulic oil in the slave cylinder 4 returns to the cylinder 31 of the switching cylinder 30 via the conduit 23, and the piston 33 moves to the one end 31a by the return hydraulic oil and the spring 32. Therefore, the hydraulic oil between the piston 33 and the one side end 31 a returns to the oil tank 7 via the master cylinder 8. As a result, the friction clutch 1 becomes “contact”.
[0014]
6 shows that the switching cylinder indicated by reference numeral 40 has a first piston 43 that is pressed against the one end 41a of the cylinder 41 by a first spring 42 when not in operation, and a gap between the first piston 43 and the first piston 43. It is assumed that a second piston 46 that is urged by the second spring 45 in the direction of the same piston while being maintained is disposed , and the hydraulic oil pipe of the manual operation hydraulic oil supply mechanism 21 is disposed on the first piston 43 side of the cylinder 41. The passage 16, the hydraulic fluid conduit 16 of the automatic operation hydraulic fluid supply mechanism 21 between the pistons 43, 46, the biasing spring 45 side of the second piston 46, that is, the one end of the cylinder 41 The pipe 23 of the slave cylinder 4 is connected to the end opposite to the portion 41a . In FIG. 6, the same reference numerals as those in FIGS. 3 and 5 represent the same members.
[0015]
With such a configuration, when the operation of the friction clutch 1 is switched from manual operation to automatic operation, for example, in the vehicle auto clutch device of FIG. 6, the motor 13 is turned on manually or automatically. When the gear pump 14 is driven, the hydraulic oil opens the check valve 15 and press-fits between the pistons 43 and 46 in the cylinder 41 of the switching cylinder 40 through the hydraulic oil pipe 16 and pushes the pistons 43 and 46. This second piston 46 is moved to the left in FIG. 6 against the second spring 45 by, press-fitting the hydraulic oil in the cylinder 41 with a second spring 45 to the slave cylinder 4 by pipe 23. Accordingly, the piston 4a is pushed to the right in FIG. 6, and thereby, the friction clutch is disengaged through the clutch release fork and the release bearing as described above.
[0016]
If the power to the motor 13 is cut off, the gear pump 14 is stopped, and the solenoid valve 20 is controlled and opened to control the return speed of the hydraulic oil, the hydraulic oil in the slave cylinder 4 passes through the pipe 23 to the cylinder. 41 returns to the chamber where the second spring 45 is located, and the returned hydraulic oil and the second spring 45 move the second piston 46 until it abuts against the piston stopper 44 in FIG. As a result, the hydraulic oil between the pistons 43 and 46 returns from the hydraulic oil pipe 16 to the oil tank 11 through the return pipe 19 and the electromagnetic valve 20. As a result, the friction clutch 1 becomes “contact”.
[0017]
When switching from auto operation to manual operation, if the clutch pedal 5 is depressed with the power to the motor 13 turned off, the piston 8a in the master cylinder 8 moves to the left in FIG. It is press-fitted into the cylinder 41 from one end 41 a of the cylinder 41 in the switching cylinder 40 through the oil pipe 9.
Accordingly, the first piston 43 moves to the left against the first spring 42 in the cylinder 41 moves the second piston 46 in FIG. 6 to the left against the second spring 45, second spring 45 The hydraulic oil in the cylinder 41 is pressed into the slave cylinder 4 through the pipe line 23. Accordingly, the piston 4a is pushed to the right in FIG. 6, and thereby, the friction clutch is disengaged through the clutch release fork and the release bearing as described above. At this time, the hydraulic oil between the pistons 43 and 46 also tends to flow to the hydraulic oil pipe 16, but the hydraulic oil pipe 16 side is blocked by the check valve 15 and the electromagnetic valve 20 and does not flow.
[0018]
When the clutch pedal 5 is returned, the piston 8a in the master cylinder 8 is returned to the right in FIG. 6 by the spring of the cylinder 8 and the like, and at the same time, the release bearing and the clutch release fork by the spring in the friction clutch 1 are used. By the return of the piston 4 a, the hydraulic oil in the slave cylinder 4 returns to the chamber having the second spring 45 in the cylinder 41 of the switching cylinder 40 through the pipe line 23, and further, the return hydraulic oil and the second spring 45 cause the first change. 2 The piston 46 returns until it abuts against the piston stopper 44, and the first piston 43 is moved to the one end 41a by the hydraulic oil and the first spring 42 , so that the first piston 43 and the one end 41a The hydraulic oil returns to the oil tank 7 via the master cylinder 8. As a result, the friction clutch 1 becomes “contact”.
[0019]
However, in the apparatus shown in FIGS. 5 and 6, when the operation is switched to the manual operation while the friction clutch is set to “disengaged” by the automatic operation as described above, the hydraulic oil in the slave cylinder 4 does not flow anywhere, so this is lost. However, there is no longer a risk that the clutch will be “contacted” and the vehicle will start suddenly. However, since the slave cylinder 4 is filled with hydraulic oil, the clutch pedal 5 cannot be stepped on as it is.
In this case, the driver returns the clutch operation to the automatic operation again with the transmission in the neutral state, turns on the solenoid valve 20 and opens the return pipe 19, and supplies the hydraulic oil in the slave cylinder 4 to the tank 11. After returning, the solenoid valve 20 was turned off, and then it was necessary to switch to manual operation again.
Further, when the clutch pedal 5 is stepped on while the hydraulic oil in the slave cylinder 4 is being returned to the tank 11, the hydraulic oil in the switching cylinders 30 and 40 escapes to the tank 11 together with the hydraulic oil from the slave cylinder 4. There is also a problem.
Further, when the motor 13 is turned off due to a failure, the operation is switched to manual operation, the power supply to the motor 13 and the solenoid valve 20 is temporarily turned off, and then only the solenoid valve 20 is turned on to turn on the slave cylinder 4. A complicated operation such as releasing the hydraulic oil in the tank 11 to the tank 11 is required, and there is a possibility that the driver who is not accustomed to the vehicle cannot respond quickly.
Incidentally, in the state of manual operation, when the clutch clutch 5 “disengages” the friction clutch and then switches to automatic operation, it is possible to open the solenoid valve 20 and “engage” the clutch. Even when the clutch pedal 5 is released in the state of switching to the automatic operation, it is possible to keep the clutch “disconnected” by the rotation of the pump 14 by the motor 13.
[0020]
[Problems to be solved by the invention]
Therefore, the problem to be solved by the present invention is to switch from auto operation to manual operation by eliminating the unbalance of the hydraulic oil amount in both the auto and manual hydraulic oil supply mechanisms in the vehicle auto clutch device that can also be operated manually. At the time of switching, and the function of returning the hydraulic oil staying in the slave cylinder to the oil tank by simple operation of the clutch pedal at the time of switching, and at the same time, failure of the slave cylinder due to excessive depression of the clutch pedal. It is an object of the present invention to provide an auto clutch device for a vehicle that is prevented.
[0021]
[Means for Solving the Problems]
An auto clutch device for a vehicle of the present invention for solving the above problems
“A slave cylinder that connects and disconnects a friction clutch is provided. For the connection and disconnection of the friction clutch by the slave cylinder, a hydraulic fluid supply mechanism for automatic operation that operates by a pump and a hydraulic fluid supply mechanism for manual operation that operates by a clutch pedal are selected. In the vehicle auto clutch device that is configured to be operated automatically,
A switching cylinder having a piston urged to one end of the cylinder by a spring is disposed, and a hydraulic oil conduit for a manual operation hydraulic oil supply mechanism is connected to the one end of the cylinder, and the cylinder Is connected to the slave cylinder by a pipe line, and the piston is moved by depressing a clutch pedal, whereby hydraulic oil is pumped to the slave cylinder,
A hydraulic oil line for the automatic operation hydraulic oil supply mechanism is connected to a spring side end of the cylinder, and the hydraulic pressure of the hydraulic oil line for the automatic operation hydraulic oil supply mechanism exceeds a set value. The relief valve for adjusting the pump pressure that opens when the cylinder is opened is provided, and the slave cylinder is provided with a stopper for regulating the stroke. ''
In the first invention, and the switching cylinder in the first invention, the piston and the spring (the first piston, the first spring) are urged by the second spring separately from the second cylinder. Using a switching cylinder with a piston,
Between the first spring side end of the cylinder and the first spring, a second piston urged by a second spring toward the one end of the cylinder is disposed, and the automatic operation is performed. When the hydraulic oil line of the hydraulic oil supply mechanism is connected between the first piston and the second piston, and the hydraulic pressure of the hydraulic oil line of the hydraulic oil supply mechanism for automatic operation exceeds a set value The relief valve for adjusting the pump pressure that is open to the rear is disposed, and the slave cylinder is provided with a stopper that restricts the stroke. "
[0022]
DETAILED DESCRIPTION OF THE INVENTION
The embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2, the same reference numerals as those in FIGS. 3 to 6 denote the same members, and a description thereof will be omitted.
In the auto clutch device of the present invention vehicle shown in FIGS. 1 and 2, the pump pressure adjusting relief valve 18 provided in the automatic operation hydraulic fluid supply mechanism 21 in the auto clutch device of the vehicle shown in FIGS. 1 and 2, between the hydraulic oil line 16 and the oil tank 11 of the hydraulic fluid supply mechanism 21 for automatic operation, specifically in the return line 19 connected to the hydraulic oil line 16. The pipe 47 is connected by a pipe 47 so as to bypass the solenoid valve 20, and the stroke of the piston 4a is regulated in proximity to the clutch release fork 3 of the slave cylinder 4, for example, connected to the tip of the rod 4b of the piston 4a. A stopper 48 is provided.
[0023]
1 and 2 configured as described above, when the operation of the friction clutch 1 is switched from manual operation to automatic operation, for example, the motor 13 is turned on manually or automatically. When the gear pump 14 is driven by the motor 13, the hydraulic oil opens the check valve 15 and is sent directly to the slave cylinder 4 through the hydraulic oil line 16 and the pipe line 23 (FIG. 1) or via the hydraulic oil line 16. The piston 41 is press-fitted between the pistons 43 and 46 in the cylinder 41 of the switching cylinder 40 and pushes the pistons 43 and 46. This second piston 46 against the second spring 45 is moved to the left in FIG. 2, the hydraulic oil in the cylinder 41 with a second spring 45 is press-fitted to the slave cylinder 4 in line 23 (FIG. 2 ).
[0024]
Accordingly, the piston 4a is pushed to the right in FIGS. 1 and 2, and as a result, the friction clutch is "disengaged" through the clutch release fork and the release bearing as described above, but the slave cylinder 4 is filled with hydraulic oil. Thus, when the automatic operation is switched to the manual operation as described above, the piston 8a in the master cylinder 8 is moved to the position shown in FIG. 2, the hydraulic oil moves in the left direction, and the hydraulic oil is press-fitted into the cylinders 31 and 41 from the one end portions 31a and 41a of the cylinders 31 and 41 in the switching cylinders 30 and 40 through the hydraulic oil conduit 9.
As a result, the pistons 33 and 43 move to the left in the cylinders 31 and 41 against the springs 32 and 42, and the hydraulic oil on the spring 32 side of the cylinder 31 in FIG. 1 or the first and second pistons in FIG. The hydraulic oil between 43 and 46 enters the pipe 47 through one of the hydraulic oil pipe 16 and the return pipe 19, opens the relief valve 18 disposed in the pipe 47 and tanks from the other of the return pipe 19. Return to 11.
If the clutch pedal 5 is returned from this state, the friction clutch of the hydraulic oil returned to the oil tank 11 becomes “contact”, and manual operation becomes possible.
Due to the strong depression of the clutch pedal 5, the hydraulic oil is further pressed into the slave cylinder 4 via the hydraulic oil pipe 23, and the piston 4a tries to move further in the direction of "disengagement" of the clutch. By restricting the stroke, it is possible to avoid an increase in hydraulic oil in the slave cylinder 4 and damage to the cylinder.
[0025]
【The invention's effect】
Both the first and second aspects of the present invention are an auto clutch device for a vehicle that selectively operates a hydraulic fluid supply mechanism for manual operation and a hydraulic fluid supply mechanism for automatic operation. A switching cylinder having a piston biased by a spring is disposed at a side end, the hydraulic oil conduit for the manual operation hydraulic oil supply mechanism is disposed at the one end of the cylinder, and the opposite spring side A slave cylinder pipe is connected to the end, and a pump pressure adjusting relief valve that opens when the hydraulic pressure exceeds a set value is disposed in the hydraulic oil supply line of the automatic operation hydraulic oil supply mechanism. The slave cylinder is provided with a stopper for regulating the stroke. And in 2nd invention, the switching cylinder which has the 2nd piston urged | biased by the 2nd spring is used for the said switching cylinder separately from the piston and the spring, and it is for the said auto operation between both pistons. The hydraulic oil line of the hydraulic oil supply mechanism is connected.
In other words, in the present invention, a switching cylinder containing a piston is provided in place of the conventional electromagnetic switching valve, and the hydraulic oil line of the manual operation hydraulic supply mechanism is separated from the pipe of the slave cylinder by this piston. Therefore, the hydraulic oil lines of both the automatic and manual hydraulic oil supply mechanisms do not communicate directly . Therefore, no matter what the switching between auto operation and manual operation is, the return hydraulic oil from the slave cylinder does not flow into either of the hydraulic fluid supply mechanisms. The balance is always maintained, and the return hydraulic oil from the slave cylinder also flows out to the communicating oil tank and the friction clutch suddenly becomes “contact”, so that the vehicle does not start rapidly.
In addition, a relief valve for adjusting the pump pressure provided in the hydraulic fluid supply mechanism for auto operation is connected between the hydraulic fluid line of the hydraulic fluid supply mechanism for the automatic operation and the oil tank, so that the slave cylinder is filled with hydraulic fluid. In this state, when switching from auto operation to manual operation, pressing the clutch pedal strongly will open the relief valve and return to the tank. It can be changed from operation to manual operation.
In addition, since the slave cylinder is provided with a stopper for restricting the stroke of the cylinder, the hydraulic oil is further pressed into the slave cylinder due to the strong depression of the clutch pedal, and the hydraulic oil in the slave cylinder increases. It is possible to prevent the cylinder from being damaged.
[Brief description of the drawings]
FIG. 1 is a fluid circuit diagram of an example of an auto clutch device of the vehicle of the present invention. FIG. 2 is a fluid circuit diagram of another example of the auto clutch device of the vehicle of the present invention. 4 is a schematic diagram showing an example of switching means in the vehicle auto clutch device shown in FIG. 3. FIG. 5 is a fluid circuit diagram of an example of the vehicle auto clutch device serving as a basis of the present invention. Fluid circuit diagram of another example of vehicle auto clutch device that is the basis of the vehicle
DESCRIPTION OF SYMBOLS 1 Friction clutch 2 Release bearing 3 Release fork 4 Slave cylinder 5 Clutch pedal 7, 11 Oil tank 8 Master cylinder 9, 16, 23 Hydraulic oil pipe 12, 17, 47 Pipe 10 Hydraulic oil supply mechanism for manual operation 13 Motor 14 Gear pump DESCRIPTION OF SYMBOLS 15 Check valve 18 Relief valve 19 Return line 20 Electromagnetic valve 21 Hydraulic oil supply mechanism for automatic operation 22 Switching mechanism 22 'Electromagnetic switching valve 30, 40 Switching cylinder 31, 41 Cylinder
32 Spring
42 First spring
45 Second spring 33 Piston 43 First piston 46 Second piston 48 Stopper

Claims (3)

A slave cylinder for connecting / disconnecting the friction clutch is provided, and the friction clutch connecting / disconnecting by the slave cylinder selectively selects a hydraulic fluid supply mechanism for automatic operation that is operated by a pump and a hydraulic fluid supply mechanism for manual operation that is operated by a clutch pedal. In the vehicle auto clutch device configured to be operated by
A switching cylinder having a piston urged to one end of the cylinder by a spring is disposed, and a hydraulic oil conduit for a manual operation hydraulic oil supply mechanism is connected to the one end of the cylinder, and the cylinder Is connected to the slave cylinder by a pipe line, and the piston is moved by depressing a clutch pedal, whereby hydraulic oil is pumped to the slave cylinder,
A hydraulic oil line for the automatic operation hydraulic oil supply mechanism is connected to a spring side end of the cylinder, and the hydraulic pressure of the hydraulic oil line for the automatic operation hydraulic oil supply mechanism exceeds a set value. An automatic clutch device for a vehicle , wherein a relief valve for adjusting pump pressure that is opened when the valve is opened, and a stopper that restricts a stroke is provided on the slave cylinder . A slave cylinder for connecting / disconnecting the friction clutch is provided, and the friction clutch connecting / disconnecting by the slave cylinder selectively selects a hydraulic fluid supply mechanism for automatic operation that is operated by a pump and a hydraulic fluid supply mechanism for manual operation that is operated by a clutch pedal. In the vehicle auto clutch device configured to be operated by
A switching cylinder having a first piston urged to one end of the cylinder by a first spring is disposed, and a hydraulic oil conduit of a manual operation hydraulic oil supply mechanism is connected to the one end of the cylinder. In addition, the first spring side end opposite to the cylinder is connected to the slave cylinder through a pipe line, and the first piston moves by depressing a clutch pedal, whereby hydraulic oil is pumped to the slave cylinder, ,
Between the first spring side end of the cylinder and the first spring, a second piston urged by a second spring toward the one end of the cylinder is disposed, and the automatic operation is performed. When the hydraulic oil line of the hydraulic oil supply mechanism is connected between the first piston and the second piston, and the hydraulic pressure of the hydraulic oil line of the hydraulic oil supply mechanism for automatic operation exceeds a set value An automatic clutch device for a vehicle , wherein a relief valve for adjusting pump pressure is provided, and a stopper for regulating a stroke is provided on the slave cylinder . The vehicle automatic clutch device according to claim 2, wherein the switching cylinder is provided with a piston stopper for restricting a range in which the second piston moves in the cylinder .

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