JPH0661632U - Antilock brake device - Google Patents

Abstract

(57) [Abstract] [Purpose] The M / C port and seat plug are integrated with the flow control valve, so they can be easily and compactly assembled into the actuator housing, contributing to a reduction in the number of parts and cost. Providing ABS that can be done. In an ABS equipped with a flow control valve that closes a valve seat when the hydraulic pressure on the master cylinder side becomes higher than a hydraulic pressure on a wheel cylinder side by a predetermined value or more, a master cylinder port (7) formed in a valve axial direction and Connect the valve seat (16) and the master cylinder port (7) to the wheel cylinders (3A, 3).
A communication passage (1) communicating with the reflux liquid passage (11) from the B) side.
The plug member (8) having 2) and 2) is integrally incorporated in the flow control valve (1).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an anti-lock brake device, and in particular, when the hydraulic pressure on the wheel cylinder (W / C) side becomes lower than the hydraulic pressure on the master cylinder (M / C) side during its control operation, M / C and W It relates to an antilock brake device (hereinafter referred to as ABS) equipped with a flow rate control valve capable of narrowing the liquid path between the valve and / C and maintaining a gradually increased pressure characteristic in W / C.

[0002]

[Prior art]

 Conventionally, an ABS having a flow control valve for reducing such a pulse pressure has been known. For example, in the one disclosed in Japanese Utility Model Laid-Open No. 63-185774, each member directly related to ABS is A flow control valve that functions as described above is incorporated into the incorporated actuator housing.

[0003]

[Problems to be solved by the device]

 However, in the ABS in which the flow control valve is incorporated in the actuator housing as described above, the M / C port for guiding the M / C side hydraulic pressure to the flow control valve is embedded in the actuator housing. It is bored from the side toward the valve, and a seat tube for connecting a liquid path is arranged in the M / C port bored in this way. Therefore, not only the actuator housing becomes bulky, but also the flow control valve, the M / C port and the seat tube need to be separately arranged, which not only increases the number of parts but also increases the production cost. There was a problem of causing an increase.

An object of the present invention is to pay attention to such a conventional problem, and in order to solve the problem, an M / C port and a seat plug are integrally formed with a flow control valve so that the actuator can be easily and compactly constructed. It is to provide an ABS that can be incorporated into a housing and can contribute to cost reduction as well as the number of parts reduction.

[0005]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention is arranged in the main fluid passage between the master cylinder and the inlet solenoid valve, and when the fluid pressure on the master cylinder side becomes higher than the fluid pressure on the wheel cylinder side by a predetermined value or more, In an anti-lock brake device equipped with a flow control valve that closes the valve seat, a master cylinder port and the above-mentioned valve seat formed in the valve axis direction, and the master cylinder port are connected to the reflux fluid passage from the wheel cylinder side. The present invention is characterized in that a plug member having a communication passage communicating with the flow control valve is integrally incorporated into the flow control valve.

[0006]

[Action]

 According to the present invention, a plug member having a master cylinder port and a valve seat for the flow control valve and a communication passage for communicating the master cylinder port with the reflux liquid passage from the wheel cylinder side is integrally assembled with the flow control valve. This structure eliminates the need to drill the master cylinder port in the housing separately from the flow control valve body, which allows the housing to be downsized and the flow control valve itself. The size of the ABS can be reduced and the number of parts can be reduced, which can contribute to the cost reduction of the ABS as a whole.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In the following, the ABS related to the wheels on the rear wheel side will be taken out and described, but for the ABS control on the front wheel side, similar devices may be provided in parallel.

In FIG. 1, 1 is a flow control valve for reducing the pulse pressure according to the present invention, 2 is M / C which generates hydraulic pressure by a pedal 2A, 3A and 3B are W / C of rear wheels, 4 Is a hydraulic pressure transmission pipe for guiding the hydraulic pressure on the W / C side to the pressure receiving chamber 6 of the flow control valve 1 via the orifice 5. The structure of the flow rate control valve 1 will be described below with reference to FIG. 2. The M / C port 7 is configured to be embedded, and the reflux liquid passage 11 from the damper 10 is guided to the M / C port 7 through the communication hole 12. 13 is a seat tube pressed into the M / C port 7, 14 is a spherical valve, 15 is provided between the seat tube 13 and the spherical valve 14, and the spherical valve 14 is biased toward the valve seat 16. A spring 17 is a piston member that is slidably held in the pressure receiving chamber 6 and keeps the spherical valve 14 separated from the valve seat 16 via the rod portion 17A thereof by the spring force of the spring 18.

In this state, the piston member 17 is in contact with the lower end portion of the plug member 8 by the spring 18, but the normally open inlet solenoid valve 19 is provided around the lower end portion and the rod portion 17A. Since the communication passages 21A and 21B communicating with the main fluid passage 20 to the main hydraulic passage 20 are formed, unless the hydraulic pressure on the M / C2 side becomes higher than the hydraulic pressure on the W / C3A, 3B side by a predetermined value or more, The M / C 2 side and the inlet solenoid valve 19 are communicated with each other through the C port 7 through the above-mentioned communication passages 21A and 21B. Further, 22 is an orifice portion provided in the valve seat 16, the hydraulic pressure on the M / C2 side becomes higher than the hydraulic pressure on the W / C3 A and 3B sides, and the valve seat 16 is closed by the spherical valve 14. Even when it is kept at a low level, the orifice effect of the orifice portion 22 maintains the slow pressure increasing characteristic on the wheel cylinders 3A, 3B side. A seal member 23 is interposed between the plug member 8 and the actuator housing 9.

Returning to FIG. 1 again, the configuration of the ABS will be described. 24 is a normally closed outlet solenoid valve, 25 is a reservoir, 26 is a hydraulic pump driven by ABS control when the W / C 3A, 3B side is depressurized, 27 is its drive motor, and the hydraulic pump 26 discharges it. The applied brake fluid is returned to the M / C 2 side through the damper chamber 10, the orifice 28, and the M / C port 7 of the flow rate control valve 1.

In the operation during normal brake operation in the ABS configured as described above, the hydraulic pressure generated at the M / C 2 flows from the M / C port 7 of the flow control valve 1 to the main liquid passage 20 and the normally open outlet electromagnetic valve. It is guided to the W / Cs 3A and 3B via the valve 19 and brake control is performed according to the depression of the pedal 2A. Further, during the ABS control, the outlet solenoid valve 24 is opened, and the hydraulic pump 26 is driven to reduce the brake fluid of W / C3 A, 3B, so that the hydraulic pressure on the M / C2 side becomes W / C2. When the hydraulic pressure on the C3A, 3B side becomes higher than a predetermined value, the piston member 17 of the flow control valve 1 is pulled down against the spring force of the spring 18, and the valve seat 16 is closed by the spherical valve 14. Is made. Therefore, the hydraulic pressure on the M / C2 side is guided to the W / C3A, 3B side from the communication passages 21A, 21B through the inlet solenoid valve 19 only through the orifice 22 provided in the valve seat 16. Slow boosting characteristics can be maintained on the W / C 3A, 3B side.

[0013]

[Effect of device]

 As described above, according to the present invention, when the hydraulic pressure on the master cylinder side becomes higher than the hydraulic pressure on the wheel cylinder side by a predetermined value or more, it is arranged in the main hydraulic passage between the master cylinder and the inlet solenoid valve. In an anti-lock brake device equipped with a flow control valve that closes a valve seat, a master cylinder port formed in the valve axis direction, the valve seat, and the master cylinder port are connected to a reflux fluid passage from the wheel cylinder side. Since a plug member having a communication passage for allowing the flow control valve is integrally incorporated in the flow control valve, it is possible to suppress pulse pressure generation during ABS control with a simple structure of the flow control valve, and to reduce W / C. It contributes to the maintenance of the slow boosting characteristic on the side, and the actuator housing can be made compact and the man-hours for the assembling work can be reduced. It can contribute to the reduction.

[Brief description of drawings]

FIG. 1 is a piping system diagram showing a configuration of an embodiment according to the present invention.

FIG. 2 is a cross-sectional view showing the structure of a flow control valve according to the present invention.

[Explanation of symbols]

 1 Flow Control Valve 2 Master Cylinder (M / C) 3A, 3B Wheel Cylinder (W / C) 4 Hydraulic Pressure Transmission Pipe 5 Orifice 6 Pressure Receiving Chamber 7 M / C Port 8 Plug Member 9 Actuator Housing 11 Reflux Liquid Channel 13 Seat Tube 14 spherical valve 15 spring 16 valve seat 17 piston member 19 inlet solenoid valve 20 main liquid passage 21A, 21B communication passage 22 orifice portion 24 outlet solenoid valve

Claims (1)

[Scope of utility model registration request] 1. A flow rate which is arranged in a main fluid passage between a master cylinder and an inlet solenoid valve and closes a valve seat when the fluid pressure on the master cylinder side becomes higher than a fluid pressure on the wheel cylinder side by a predetermined value or more. In an anti-lock brake device including a control valve, a plug having a master cylinder port formed in the valve axis direction and the valve seat, and a communication passage communicating the master cylinder port with a reflux fluid passage from the wheel cylinder side. An antilock brake device, characterized in that a member is integrally incorporated in the flow control valve.