JPS60110560A - Brake holding device - Google Patents

Abstract

PURPOSE:To enable control of braking during failure in operation, by a method wherein, in a titled device which is adapted to be operated in linkage with operation of a clutch device so as to facilitate the starting of a vehicle on an ascent road, a valve device is held in an opening state through operation of a switch in linkage with excess movement of a control shaft. CONSTITUTION:A titled device is braked in a way that, when a vehicle is brought to a stop on an ascent road, working liquid, generated from a master cylinder through pedalling of a brake pedal, is supplied from connecting holes 7 and 8 to each wheel cylinder through valve devices A, B and connecting holes 9 and 10. A shaft part 19 of a plunger 15 is moved aside from a valve seat 16 with a cam 11 moved rightward through rotation of a control shaft 12 in linkage with disengaging control of a clutch through a wire 54, and a valve member 20 is seated on a valve seat 16 under gravity, and this hols a liquid pressure on the wheel cylinder side. In which case, when the control shaft 12 is excessively rotated due to some cause, such rotation is detected by a switch, not shown, and with an electromagnet 24 excited, a valve device B is held in an opening state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brake holding device that is linked to the operation of a clutch device in order to facilitate starting on a climbing road.

The applicant has previously made various proposals of this type, but their basic configuration is an inlet connected to a mask cylinder, an outlet connected to a wheel cylinder, and an inlet. A valve device having a movable valve member installed in a passageway communicating with an exit and capable of moving and seating under its own weight on a climbing path; and a valve operating device operating to open and close the valve device in response to actuation of a clutch device. , the valve operating device has an operating shaft that moves between a first position for opening the valve device and a second position for closing the valve, and the operating shaft is disposed between the valve device and the clutch device. The proposed device is biased toward one position via a fixed wire, and biased toward the other position by a spring stretched between it and a fixed object.

However, in such a device, when the operating shaft is no longer interlocked with the clutch device due to a wire being cut or the like, the operating shaft is located at the second position where the valve device closes, and pressure fluid flows downstream of the valve device. There is a problem in that the vehicle is supplied to the vehicle and is confined as it is, making it impossible to release the brakes and making it impossible to drive.

The present invention has been made in view of these problems, and an object of the present invention is to provide a brake holding device that allows normal brake operation in the event of a failure. The movable valve member is provided with a switch that is activated in response to the operation of the valve, and an electromagnet that is excited in response to the activation of the switch and urges the movable valve member to the unseated position.

As a result, in the event of a failure, the movable valve member cannot be moved by its own weight, and normal braking can be performed freely.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The brake holding device of the present invention will be explained in detail below based on illustrated examples.

FIG. 1 is a front sectional view showing the main parts of a brake holding device according to an embodiment of the present invention, and FIG. 2 is a plan view of the main parts shown in FIG. In the figure, the brake holding device is
The main part is indicated as 1 as a whole, and the device 1 has a main body 4 formed by combining a large main body 2 and a small main body 3, and this main body 4 includes a large main body 2 and a small main body 3, and a shaft hole 6 formed at the right end of the stepped hole.

The right and left ends of the stepped hole 5 are connected to piping connection parts 7 and 8 so as to be connected to different hydraulic pressure generation chambers of a two-system brake mask cylinder (not shown), and the central part of the stepped hole 5 is For example, the piping connection part 9 is connected to the brake wheel cylinders (not shown) of the front right wheel and the rear left wheel, and the vicinity of the left end of the stepped hole 5 is connected to the brake wheel cylinders (not shown) of the front left wheel and the rear right wheel. 1), respectively. Further, in the shaft hole 6, an operating shaft 12 having a cam 11 formed thereon by eccentrically reducing its diameter is provided with a close member 13 and a backup ring 1 on both sides of the cam 11.
4 and are inserted rotatably.

The cam 11 of the operating shaft 12 is located in the small diameter hole on the right end side of the stepped hole 5.
A plunger 15 that can come into contact with the stepped hole 5 is movably inserted between it and a ball guide 17 with a valve seat 16 disposed across the large diameter hole and the medium diameter hole in the center of the stepped hole 5. Due to the arranged spring 18, the plunger 15 is kept in contact with the cam at all times. Still, the left side of the plunger 15 is a small-diameter shaft portion 19, which protrudes into the ball guide 17 through the center hole of the valve seat 16, and is a ball-shaped valve member disposed within the ball guide 17 so as to be able to move under its own weight. 20 so that it can come into contact with it. Further, the granger 15 is movable leftward and rightward in accordance with the displacement of the cam 11 as described later, and by moving to the right, the small diameter shaft portion 19 does not protrude beyond the valve seat 16 and the valve member 20 closes the valve. The valve member 20 is moved to a position where it can be fully seated on the seat 16, and moved to the left.
be forcibly removed from the valve seat 16 or moved to a position where it cannot be seated. In addition, since the valve member 20 is attached to the vehicle body so that the left side of the stepped hole 5 is on the forward direction side of the vehicle and the axis of the stepped hole 5 is in the horizontal direction, the main body 4 is attached to the vehicle body. When the vehicle runs on a boarding road, it moves toward the valve seat 16 due to its own weight. The inside of the ball guide 17 communicates with the connecting portion 9 and the center hole of the valve seat 16.
The plunger 15 is connected to the connecting part 7 via the groove 21, etc., and both sides of the valve member 20 are connected to the groove 22 on the inner surface of the ball guide 17.
I am in touch with you. Therefore, the valve member 20 and the valve seat 16
This constitutes a first valve device A that can contain the pressure on the wheel cylinder side on one side of the two-system piping.

Slightly to the left of the center of the stepped hole 5, an electromagnet 24 is fitted inside the large hole of the stepped hole 5 and externally fitted into the cylindrical portion 23 of the small body 3.
A valve member 20 made of a magnetic material can be attracted to an adsorption portion 25 formed opposite to the valve member 20 in response to a signal from the outside. The electromagnet 24 is the main body 4
It is connected to an electric circuit (not shown) via a lead wire 26 extending outward. The adsorption part 25 of the electromagnet 24 is provided with a center hole 27, which provides liquid communication between the left and right sides of the adsorption part 25. Also, between the adsorption part 25 and the cylindrical part 23, there is a holed plate made of synthetic resin. 28 is placed under pressure.

A stepped piston 29 with a slightly smaller diameter on the left side is slidably inserted into the stepped hole 5 on the left side of the plate 28, and a return piston 29 is inserted between the left end and the bottom of the stepped hole 5. It is biased by a spring 30 to a position where it abuts against the shibrate 28.

The left side of the stepped piston 29 is a relay chamber 31 that connects the aforementioned connecting parts 8 and 10, and this relay chamber 3
The communication between the two connections 8 and 10 via 1 is as follows:
It is controlled by a second valve device B that can contain the wheel cylinder side pressure in the other side of the system piping.

The second valve device B includes a valve member 34 fitted into a support member 33 with a hole that is caulked to the cylindrical portion 32 of the stepped piston 29.
and a seat 34 formed at the bottom of the left end of the stepped hole 5, which can block free communication between the relay chamber 31 and the small hole 36 that opens in the bottom and communicates with the connection hole 8. It is. The outer periphery of the valve member 34 is supported by a retainer 37 which has a flange-like pot shape and has a hole at the bottom that allows the central part of the valve member 34 to sit on the seat 35. A protrusion 38 with an i+″ angle is provided near the opposite end.
is press-fitted into the groove 39 of the cylindrical portion 32 and integrated with the stepped piston 29 .

The protrusion 38 of the retainer 37 consists of a pair of 7. It is formed by bending the band-shaped wall portion located between the slots (not shown) inwardly, but due to the presence of the slots, the groove 39 is bent outward of the retainer 37. A valve chamber 40 is formed within the cylindrical portion 32 of the stepped piston 29 by communicating with the threaded groove 39 and the aforementioned support member 33 .

A valve body 43 is movably inserted into the valve chamber 40 and is lightly urged by a valve spring 42 toward a seat 41 provided at the right end of the support member 33. The valve body 43 is a rubber valve. It is constructed by combining a member and a metal external sound μ material fitted therein, and both can be seated on a seat 41. Valve body 43,
Seat 41 etc. + soil, even if the second valve device B is closed, the connector L
8 (11111 force) to 1 continuation (reverse that allows liquid movement to the Li2 side and prohibits the opposite) E-valve C is configured, and connecting hole 1
When the pressure on the 0 side is higher than the pressure on the connection hole 9 side, only the rubber valve member of the valve body 43 is seated on the seat 41 when the height is relatively small, and when it is thick, the rubber valve member is seated on the seat 41. and a metal pole valve member are both seated on the seat 41. Note that the support member 33
is made of metal.

On the other hand, the upper end of the operating shaft 12 inserted into the shaft hole 6 has a diameter reduced to form a mounting portion 44 that protrudes to the outside. 46 and is prevented from coming off, and the mounting portion 44
A waterproof and dustproof boot 47 is attached between the lower part of the main body 2 and the main body 2.

Further, on the upper side of the mounting portion 44, a fan-shaped rotating member 48 and a cover 49 that covers the boot 47 are strongly fixed via a washer 51 by a nut 50 screwed onto the upper end of the mounting portion 44. Although not shown explicitly, the operating shaft 12 and the rotating member 48 are connected by fitting holes with non-circular cross-sections into each other so that they can rotate integrally.

Bladder 1/r A and rotating member 4
8 is formed by welding plate members 52+j3 of approximately the same shape, and a wire 54 is inserted into the gap formed between the drawing board members 52 and 53, and a cylindrical shape integrated with the end of the wire 54 is formed. The stop 55 is fitted into a hole F+6 formed in alignment with the drawing board member 52,53. Most of the entire length of the wire 54 is covered by a wire guide 57, and the other end is connected to a clutch release lever of a clutch device (not shown), and when the lever swings in the direction of connecting the clutch, , in response, the rotating member 48 moves to the second position.
The cam 11 is rotated counterclockwise in the figure to move the cam 11 to the first position.
When the cam 11 is moved to the left in the figure and swings in the direction of disengaging the clutch, the rotating member 48 rotates clockwise in FIG.
Wire 54 is arranged to interlock the operating shaft 12 and the clutch device so as to move it to the right in the figure.

Such a wire 54 is attached to a support 59 which is bolted to the upper part of the main body 4 to attach a mounting bracket 58 at the end of the wire guide 57.
By being attached to the rotary member 48, the rotary member 48 is supported so that the rotational force applied to the rotary member 48 is in a fixed direction.

Furthermore, the rotating member 48 is provided with a pin 60 at its end in the clockwise direction, and this pin 6o and a support that are simultaneously attached to the small body 3 by bolts that connect the small body 3 and the large body 2 are attached. A spring 62 is tensioned with a predetermined tension between the rotation member 48 and the rotation member 6D, and positively applies rotation force to the rotation member 48 in the clockwise direction.

Further, one plate member 52 of the rotating member 48 is provided with a protrusion 63 on the radially outward side of the bottle 60.
1, there is a plate-shaped auxiliary protrusion 64 extending downward in FIG.
is formed. A switch 65 is installed opposite this auxiliary protrusion 64.

The switch 65 is a normal limit switch, but its installation position is such that it cannot be switched within the range in which the rotating member 48 normally rotates, but is switched when the rotating member 48 rotates beyond this range. Na・oshi, also lead wire 6
6 and is connected to an electric circuit (not shown). Such a switch 65 is connected to a board 67 attached to the bottom of the main body 1.
It is attached to a mounting portion 68 extending upward in FIG. 1.

Further, the board 67 is used to attach the main body 4 to the vehicle body in a predetermined relationship.

In the other figures, the sealing member and the waterproof member are both made of non-magnetic material in order for the electromagnet 24 to operate efficiently.

Electromagnet 24? The inches 65 are both connected to an electric circuit, and the electric circuit may be of any type as long as it functions as described below.

That is, the electric circuit is further connected to a reverse switch that detects that the gear change lever has been switched to the reverse position, and when the switch 65 or the reverse switch is actuated, it energizes the electromagnet 24. The notification lamp on the panel opposite the driver's seat lights up and a buzzer or chime sounds for a short time.

Hereinafter, the operation of the above embodiment will be explained in detail.

Assume that the brakes are not applied and the vehicle is traveling at a constant speed on level ground. Then, since there is no pressure in the stepped hole 5 and the clutch is also connected, the cam 11 is in a position shifted to the left side. As a result, as shown in the figure, in the first valve device A, since the small diameter shaft portion 19 of the plunger 15 protrudes from the valve seat 16, the valve member 20 cannot be seated, and the valve cannot be opened. The second valve device B is operated by the stepped piston 2 due to the biasing force of the return spring 30.
9 is in a position where it contacts the plate 28, and the valve is opened.
Further, the check valve C is closed with only the rubber valve member of the valve body 43 seated on the seat 41 due to the biasing force of the valve spring 42.

Note that even if the clutch pedal is depressed in this state and the operating shaft 12 rotates in response to the valve member 20 being seated, there is no problem since the brake is not applied.

From the above state, in other words, from constant speed driving on flat ground,
When the vehicle changes to running on a climbing road, the valve member 20 actively attempts to sit on the valve seat 16 due to its own weight, but since the small diameter shaft portion 19 protrudes from the valve seat 16, the valve member 20 does not sit on the valve seat 16.

If the brakes are applied due to a railroad crossing or a stop signal while driving on such a boarded road, then, in response to the operation of the mask cylinder, on the one hand, the first valve device is released from the connection hole 7. On the other hand, the hydraulic fluid flows from the connecting hole 8 to the connecting hole beyond the second valve device B or the check valve C, and on the other hand, the hydraulic fluid flows from the connecting hole 8 to the connecting hole beyond the second valve device B or check valve C.
is supplied to the cylinder, and the brake begins to apply. After this, as the fluid pressure rises further, when it starts to rise,
The stepped plunger 29 moves to the left against the biasing force of the return spring 30 due to the difference in the pressure receiving area difference between the left and right sides, and closes the second valve device B. Pressure liquid is supplied while opening the stop valve C.

When the brakes are applied in this way and the vehicle etc. is greatly decelerated, the driver operates the clutch to disengage, and the operating shaft 12 rotates in response to this, causing the cam 11 to move to the right in FIG. The plunger 15 is displaced to the right by the biasing force of the spring 18. As a result, the small diameter shaft portion 19 is drawn inward of the valve seat 16, and the valve member 20 is seated on the valve seat 16 by its own weight. Thereafter, in some piping, the flow of pressure liquid causes the valve member 20 to separate from the valve seat 16, thereby supplying the pressure liquid to the shift wheel cylinder side.

After passing through such a state, it is assumed that the vehicle or the like comes to a stop on the road and the brake is released.

Then, on one piping side, the first valve device A closes,
And on the other piping side, a second valve device B and a check valve C
Since the valve is closed, even if the hydraulic pressure on the master cylinder side is released, the hydraulic pressure on the wheel cylinder side is not released and remains contained, and in the end, the clutch disengagement operation is held and the brake is also applied. state.

After this, when attempting to start the vehicle, the driver changes gears, slightly depresses the accelerator, and gradually releases the clutch pedal.

Then, the clutch device enters a so-called half-clutch state, and driving force is gradually transmitted to the wheels. On the other hand, the operating shaft 12 gradually rotates counterclockwise in FIG. 2, and the cam 11 gradually moves to the left in FIG. Due to this displacement of the cam 11, the plunger 15 gradually moves the small diameter shaft portion 19 to the left so that it is projected from the valve seat 16, and finally, almost at the same time as a certain amount of driving force begins to be transmitted to the wheels. , the first valve device A is opened by separating the valve element 20 from the valve seat 16. By opening this first valve device A, the pressurized liquid that was sealed in the wheel cylinder side of one piping system is released to the mask cylinder side,
Start releasing the brakes. By loosening the brake on one of the piping systems, the pressure acting on the left and right ends of the stepped piston 29 decreases, and the pressure acting on the left end of the stepped piston 29 causes the stepped piston 29 to moves to the right and releases the valve member 34 from the seat 35 to open the second valve device B, and releases the pressure fluid on the wheel cylinder side of the other piping system to the mask cylinder side, and the brake Start to relax.

In this way, the driving force is transmitted to the wheels and the brakes are released, so the vehicle finally starts on the uphill road, and when this starting is completed, the clutch in the clutch device is completely connected. In the brake device, the brake is completely released, and the vehicle can then be driven in the normal manner.If the wire 54 is cut for some reason, the rotating member 48 is moved by the biasing force of the spring 62. , rotates clockwise in FIG. 2 until the auxiliary protrusion 64 comes into contact with the switch 65, thereby activating the switch 65. Then, a command to excite the electromagnet 24 and a command to activate the driver's notification device is issued from the electric circuit connected to this, and the valve member 34 is attracted to the suction portion 25, and a buzzer or alarm is emitted as an alarm. Sound a chime for a short time and turn on a lamp.

This allows the driver to know about the malfunction well in advance, and when stopping on the road, the driver must start using the normal means of using the handbrake, or
If you want to apply the handbrake when the machine has stopped, you can recognize in advance that releasing the pressure in the mask cylinder will release all the pressure, and even inexperienced users can perform various operations with sufficient leeway. This will further ensure traffic safety.

In addition, in the event of a failure, the valve member 20 is held while being attracted to the adsorption portion 25, so that the brake can be loosened and tightened in the same way as in the case where the first valve device A is not present. Even if the stepped piston 29 moves from side to side, the second valve device B can loosen the brake in accordance with the loosening of one piping system, and can maintain its original function as a brake.

Furthermore, since the 9 lamp continues to be lit until the failure is repaired, it is possible to carry out repairs without forgetting them.

Although the above embodiments have various useful effects, the present invention is not limited to the above embodiments, but can be implemented. That is, for example, an example in which the wheel cylinder sides of two systems are each sealed instead of only one side, an example in which the operating shaft is reciprocated in a certain direction instead of rotating, an example in which the operating shaft is moved excessively to one side. A switch is provided to detect not only excessive movement to the other side, but also excessive movement to the other side.
An example of activating a notification device in response to movement toward the blade side, an example of constantly measuring the movement of the operation axis over the entire movement range, and making it possible to notify even normal operation, an example of using an artificial voice as a notification device, Examples include interlocking with a clutch device so that the operating shaft 12 is displaced to the second position due to breakage of the spring 62, and it is also possible to implement the method other than this measuring tool.

As is clear from the above description, according to the present invention, the movable valve member can be attracted to the unseated position by an electromagnet, so that normal brake operation can be performed in the event of a failure.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing the main parts of a brake holding device according to an embodiment of the present invention, and FIG. 2 is a plan view of the main parts shown in FIG. 1...Brake holding device 12...Operation shaft 20...
Valve member 24...Paper magnet 65...Suinochi procedure amendment written type] March 23, 1980 Commissioner of the Patent Office Mr. Wainu Wakasugi Blind Go 1, Indication of the case 1982 Patent Application No. 218169 2, Invention Name of brake holding device 3, Person making the amendment Relationship to the case Patent applicant postal code 651 (Telephone: Kobe (078) 231-4134) 6, Specification of contents of amendment (no change in contents) as attached, Rules Attach a printout of the size that follows. 7. Attached document m (specification statement) 1 copy

Claims (1)

[Claims] A valve device having an inlet connected to a mask cylinder, an outlet connected to a wheel cylinder, and a movable valve member provided in a passage connecting the inlet and the outlet and capable of moving under its own weight on a boarding road and being seated; a valve actuating device that operates to open and close the valve device in response to actuation of a clutch device, the valve actuating device being in a first position for opening the valve device and a second position for closing the valve device; It has a moving operating shaft, which is biased towards either position via a wire disposed between it and the clutch device, and is biased towards either position by a spring stretched between it and the fixed object. The brake holding device includes a switch that operates in response to excessive movement of the operating shaft, and a switch that is energized in response to the operation of the switch to separate the movable valve member. A brake holding device comprising an electromagnet that urges the brake to a seated position.