JP2001039284A - Vehicle brake fluid pressure control device - Google Patents

Abstract

(57) [Summary] A brake fluid can be returned to a master cylinder.
A reservoir that stores brake fluid as a function
Communication and disconnection between the
Switch the connection and disconnection between the rake and reservoir to
Control valve means capable of controlling the rake hydraulic pressure
Brake pressure control for vehicles installed on cylinder body of cylinder
In the control device, the fastening part of the cylinder body to the support member
Prevents large loads from acting. A valve mounting hole for mounting a control valve means.
4_FL, 64_FR, 64_RL, 64 _RR; 65_FL, 65_FR, 65
_RL, 65_RRAnd the reserve piston are slidably fitted.
And a reservoir hole 66A for constituting a reservoir.
Open the bottom of the cylinder body
The valve mounting hole 64 provided on the body_FL~ 64_RR; 65 _FL~ 65
_RRAnd the reservoir hole 66A includes the axis of the cylinder hole.
It is arranged symmetrically with respect to the vertical plane.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a master cylinder having a reserve tank attached to a cylinder body and a cylinder hole provided at a plurality of positions around an open end of the cylinder hole. A reservoir that is fastened to the member and stores the brake fluid by allowing the brake fluid to return to the master cylinder side during the return operation of the master cylinder, and the communication and cutoff between the master cylinder and the wheel brake, and between the wheel brake and the reservoir. Control valve means capable of controlling the hydraulic pressure of the wheel brakes by switching between communication and disconnection relates to a vehicle brake hydraulic pressure control device provided in the cylinder body.

[0002]

2. Description of the Related Art Conventionally, such a brake fluid pressure control device has
For example, it is already known in JP-A-10-67310.

[0003]

The above publication discloses a structure in which a control valve means is attached to a cylinder body on one side of an axis of a cylinder hole and a reservoir is provided in the cylinder body below the axis. A brake fluid pressure control device, and a brake fluid pressure control device having a configuration in which a reservoir is disposed in the cylinder body on one side of the axis of the cylinder hole and control valve means is attached to the cylinder body below the axis. However, in any of the devices, the weight balance on the left and right of the axis of the cylinder hole is not taken,
The rotational moment about the axis of the cylinder hole acts on the fastening portion of the cylinder body to the support member such as the booster shell of the negative pressure booster due to the imbalance of the weight, and the load on the fastening portion increases. .

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle brake fluid pressure control device which prevents a large load from acting on a fastening portion of a cylinder body to a support member. And

[0005]

In order to achieve the above object, the present invention provides a master cylinder having a cylinder body provided with a reserve tank and a cylinder hole, the cylinder body being provided around an open end of the cylinder hole. At a plurality of points, the cylinder body is fastened to a fixed support member, and a reservoir for storing brake fluid by allowing the brake fluid to return to the master cylinder side during the return operation of the master cylinder, and between the master cylinder and the wheel brake. Control valve means capable of controlling the hydraulic pressure of the wheel brakes by switching between communication and disconnection and between communication and disconnection between the wheel brakes and the reservoir, wherein the control valve means is provided in the cylinder body. To form a reservoir by slidably fitting a valve mounting hole for mounting valve means and a reserve piston A reservoir hole is provided in the cylinder body so as to open on the lower surface of the cylinder body, and the valve mounting hole and the reservoir hole are arranged symmetrically with respect to a vertical plane including an axis of the cylinder hole. It is characterized by.

According to such a configuration, the control valve means and the reservoir are disposed on the cylinder body in a symmetrical arrangement with respect to a vertical plane including the axis of the cylinder hole, and the control valve means and the reservoir are arranged on the left and right sides of the axis of the cylinder hole. The weight of the control valve means and the reservoir can be balanced, so that a large rotational moment around the axis of the cylinder hole is prevented from acting on the fastening portion of the cylinder body to the support member such as the booster shell of the negative pressure booster. The load on the unit can be reduced. Moreover, the control valve means is mounted on the cylinder body from below, and the reserve piston of the reservoir is fitted to the cylinder body from below, so that the control valve means and the reservoir are assembled and removed from the cylinder body from the same direction. As a result, the assembling and removing operations of the control valve means and the reservoir are facilitated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on one embodiment of the present invention shown in the attached drawings.

1 to 10 show a first embodiment of the present invention. FIG. 1 is a hydraulic circuit diagram of a vehicle brake hydraulic pressure control device, and FIG. 2 is a negative pressure booster and a brake hydraulic pressure control device. 3, FIG. 3 is an enlarged view as viewed in the direction of the arrow 3 in FIG. 2, FIG. 4 is a cross-sectional view taken along the line 4-4 in FIG. 3, FIG. FIG. 7 is a sectional view taken along line 7-7 of FIG. 3,
8 is a bottom view of the cylinder body as viewed from the direction of arrows 8-8 in FIG. 7, FIG. 9 is a perspective view showing a hollow portion in the cylinder body through, and FIG. 10 is a view showing a hollow portion in the cylinder body. 9 of 10
It is the perspective view seen from the arrow direction.

First, in FIG. 1, for example, left and right front wheels of a four-wheeled vehicle are equipped with wheel brakes B _FL and B _FR for left and right front wheels, respectively, and left and right rear wheels are respectively left and right. Wheel brakes B _RL and B _RR for the rear wheels are mounted respectively.

The depression force of the brake pedal 3 amplified by the negative pressure booster 2 acts on the master cylinder M provided with the reserve tank R, and the first and second output ports 4A, 4A, 4B outputs a brake fluid pressure corresponding to the pedaling force. The first output port 4A has wheel brakes B _FL for the left front wheel and the right rear wheel,
A first output hydraulic path 5A corresponding to B _RR is connected, and a second output hydraulic path 5B corresponding to the wheel brakes B _FR and B _RL for the right front wheel and the left rear wheel is connected to the second output port 4B. Connected.

The first output hydraulic pressure line 5A is connected to the first output hydraulic pressure line 5A.
First one-way valve 10 that permits the flow of brake fluid to A side
A, is connected to the first reservoir 7A for storing the brake fluid, and the second output hydraulic pressure passage 5B is connected to the second output hydraulic pressure passage 5B.
One-way valve 10B that allows the flow of brake fluid to the side
Is connected to a second reservoir 7B for storing the brake fluid. In other words, when the depression of the brake pedal 3 is stopped and the master cylinder M is returned, the brake fluid can be returned from the first and reservoirs 7A and 7B to the master cylinder M side.

Control valve means _6FL is provided between the left front wheel brake _BFL and the first output hydraulic pressure passage 5A and the first reservoir 7A, and the right rear wheel brake _BRR and the first rear wheel brake _BRR are provided. Control valve means _6RR is provided between the output hydraulic pressure path 5A and the first reservoir 7A. Wheel brake B for right front wheel
Control valve means _6FR is provided between _FR and the second output hydraulic path 5B and the second reservoir 7B, and a wheel brake _BRL for the rear left wheel, the second output hydraulic path 5B and the second reservoir 7B are provided. Is provided with a control valve means 6 _RL .

The control valve means 6 _FL corresponding to the wheel brake B _FL for the left front wheel, the normally open electromagnetic valve provided between the wheel brake B _FL for the first hydraulic pressure output channel 5A and the left front wheel 11
_FL , a check valve 12 _FL connected in parallel with the normally-open solenoid valve 11 _FL , a wheel brake B _FL for the left front wheel, and a first
A normally closed solenoid valve 13 _FL provided between the reservoirs 7A.

This control valve means 6_FLIs a normally open solenoid valve 11
_FLDemagnetize and open the valve and the normally closed solenoid valve 13_FLTurn off
Close the magnet and close the master cylinder M and the wheel block for the left front wheel.
Rake B_FLAnd the wheel brake B_FLAnd
Between the pressure and the first reservoir 7A.
Magnetic valve 11_FLThe solenoid valve 13 is energized and closed, and the normally closed solenoid valve 13 is closed.
_FLAnd open the valve for the master cylinder M and the left front wheel.
Wheel brake B_FLWheel between left and front wheels
Brake B_FLAnd pressure reduction communicating between the first reservoir 7A
State and normally open solenoid valve 11_FLExcitation and valve closing
Normally closed solenoid valve 13 _FLDemagnetize and close the valve to master cylinder M
And the first reservoir 7A and the wheel brake B for the left front wheel_FL
To switch between the hydraulic pressure holding state that shuts off both
Is controlled.

The control valve means 6 _FR corresponding to the wheel brake B _FR for the right front wheel, the normally open electromagnetic valve provided between the wheel brake B _FR of the second output hydraulic pressure line 5B and the right front wheel 11
_FR , a check valve 12 _FR connected in parallel with the normally-open solenoid valve 11 _FR , a wheel brake B _FR for the right front wheel, and a second
A normally closed solenoid valve 13 _FR provided between the reservoirs 7B communicates with the master cylinder M and the wheel brake B _FR for the front right wheel, and the wheel brake B for the front right wheel.
_A pressure increasing state in which the connection between _FR and the second reservoir 7B is cut off, and a pressure reducing state in which the connection between the master cylinder M and the wheel brake B _FR for the right front wheel and the communication between the wheel brake B _FR for the right front wheel and the reservoir 7B are established. , Master cylinder M
And it is controlled to switch between a hydraulic holding state to block both between the wheel brake B _FR for reservoir 7B and right front wheel.

The control valve means 6 _RR corresponding to the wheel brake B _RR for the right rear wheel includes a normally open solenoid valve 11 provided between the first output hydraulic pressure path 5A and the wheel brake B _RR for the right rear wheel.
_RR , a check valve 12 _RR connected in parallel with the normally-open solenoid valve 11 _RR , a wheel brake B _RR for the right rear wheel, and a first
A normally closed solenoid valve 13 _RR provided between the reservoirs 7A.

This control valve means 6_RRIs a normally open solenoid valve 11
_RRDemagnetize and open the valve and the normally closed solenoid valve 13_RRTurn off
Close the magnet and close the master cylinder M and the wheel block for the right rear wheel.
Rake B_RRAnd the wheel brake B_RRAnd
Between the pressure and the first reservoir 7A.
Magnetic valve 11_RRThe solenoid valve 13 is energized and closed, and the normally closed solenoid valve 13 is closed.
_RRAnd open the valve for the master cylinder M and the right rear wheel.
Wheel brake B_RRThe right rear wheel is cut off between
Brake B_RRAnd pressure reduction communicating between the first reservoir 7A
State and normally open solenoid valve 11_RRExcitation and valve closing
Normally closed solenoid valve 13 _RRDemagnetize and close the valve to master cylinder M
And the first reservoir 7A and the wheel brake B for the right rear wheel_RR
To switch between the hydraulic pressure holding state that shuts off both
Is controlled.

[0018] Further, the control valve means 6 _RL corresponding to the wheel brake B _RL for the rear left wheel, the normally open electromagnetic valve provided between the wheel brake B _RL of the second output hydraulic pressure line 5B and the left rear wheel 1
1 _RL , a check valve 12 _RL connected in parallel to the normally-open solenoid valve 11 _RL , a normally-closed solenoid valve 13 _RL provided between the wheel brake B _RL for the left rear wheel and the second reservoir 7 B. And a pressure-increasing state in which communication between the master cylinder M and the wheel brake B _RL for the left rear wheel and communication between the wheel brake B _RL and the second reservoir 7B are interrupted. and a reduced pressure state for communicating between the wheel brake B _RL and second reservoir 7B for the left rear wheel with blocking between brake B _RL, the master cylinder M and the second reservoir 7B and the wheel brake B _RL for the rear left wheel Control is performed so as to switch between a hydraulic pressure holding state in which both are shut off.

Moreover, each of the check valves 12 _FL , 12 _FR ,
12 _RL and 12 _RR are the corresponding normally open solenoid valves 11 _FL , 11 _FR and
11 _RL and 11 _RR respectively.

In FIG. 2, a rear portion of a booster shell 14 provided in the negative pressure booster 2 is connected to a dashboard 15 of the vehicle.
Is concluded. On the other hand, a pair of flange portions 16a, 16a projecting right and left is integrally provided at the rear end of the cylinder body 16 of the master cylinder M on the booster shell 14 side, and the flange portions 16a, 16a are provided with the booster. Each is fastened to the front part of the shell 14. That is, the rear end of the cylinder body 16 is fastened to the booster shell 14 as a support member fixed to the vehicle body,
The reserve tank R is provided above the cylinder body 16.

In the lower part of the cylinder body 16,
Control valve means 6 _FL , 6 _FR , 6 _RL , 6 _RR;
Reservoirs 7A, 7B and first and second one-way valves 10
A and 10B are provided, and the negative pressure booster 2 is provided.
As shown in FIG. 3, the control valve means 6 _FR , 6 _RL , 6 _RR , 6 _FL
The connection ports 17 _FR , 17 _RL , 17 _RR , and 17 _FL capable of outputting the brake fluid pressures respectively controlled by are provided in order from the left side to the right side in FIG. Thus, connection port 17
_FR is connected to the right front wheel brake _BFR , connection port _17RL is connected to the left rear wheel brake _BRL , connection port _17RR is connected to the right rear wheel brake _BRR , and connection port 17RL. _FL is connected to the left front wheel brake B _FL .

In FIG. 4, the cylinder body 16 has a bottomed hole 18 having a rear end (the right end in FIG. 4) on the side of the negative pressure booster 2 and a closed front end. The rear end (the right end in FIG. 4) of the bottomed hole 18 has a front part of the support cylinder 19 in which a part on the rear side projects into the negative pressure booster 2. Is screwed. Moreover, the bottomed hole 18 has the first, second and third cylinder hole forming bodies 20, 21, and
22 are inserted, and these cylinder hole forming bodies 2
0, 21 and 22 are sandwiched between the support cylinder 19 and the cylinder body 16.

The first cylinder hole forming body 20 has a flange 20a.
And formed in a ring shape. Further, the front part of the second cylinder hole forming body 21 formed in a cylindrical shape is fitted into the bottomed hole 18 so as to sandwich the flange 20 a of the first cylinder hole forming body 20 between the cylinder body 16 and the second cylinder hole forming body 21. The rear part of the two-cylinder hole forming body 21 is inserted into the front part of the support cylinder 19. Further, the third cylinder hole forming body 22 integrally has a flange portion 22a sandwiched between a step portion 19a provided on the inner surface of the support cylinder 19 in the axially intermediate portion and the rear end of the second cylinder hole forming body 21. The front part of the third cylinder hole forming body 22 is fitted to the rear end of the second cylinder hole forming body 21, and the rear part of the third cylinder hole forming body 22 is
9 is fitted to the rear part.

The inner surface of the first cylinder hole forming body 20 cooperates with the inner surface of the front end of the bottomed hole 18 to form a first cylinder hole 23. The front end of the first cylinder hole 23 has a bottomed hole. The hole 18 is closed at the front end closing portion. A first piston 2 forming a first hydraulic chamber 24 with the cylinder body 16;
5 is inserted into the first cylinder hole 23, and the first hydraulic chamber 24 accommodates a first return spring 26 for urging the first piston 25 rearward. Further, the first output port 4 </ b> A is provided in the cylinder body 16 in communication with the first hydraulic chamber 24.

Referring also to FIG. 5, the first piston 25
A first cup seal 27 mounted between the first cylinder hole forming body 20 and the cylinder body 16 is resiliently slidably contacting the outer periphery of the first cylinder hole forming body 20 and the first cup seal 27. Between the first and second
The second cup seal 28 mounted between the cylinder hole forming bodies 20 and 21 resiliently comes into sliding contact with each other.

An annular replenishing liquid chamber 29 is formed between the front end of the first cylinder hole forming body 20 and the cylinder body 16 so as to face the back surface of the first cup seal 27. Further, the outer circumference of the flange portion 20a provided in the first cylinder hole forming body 20 and the second
The front end of the cylinder hole forming body 21 and the cylinder body 16
An annular liquid chamber 30 communicating with the reserve tank R is formed between the flanges 20a. A plurality of slits 31 are provided at positions spaced apart in the circumferential direction of the flange portion 20a so as to extend in the radial direction. The replenishing liquid chamber 29 and the liquid chamber 30 are communicated with each other via.

A plurality of notches 32 are provided in the cylinder body 16 at a portion facing the front surface of the first cup seal 27 at intervals in the circumferential direction.
7 is a notch from the replenishing fluid chamber 29 when the fluid pressure in the first fluid pressure chamber 24 is lower than the fluid pressure in the replenishing fluid chamber 29 that has passed through the slits 31 and the fluid chamber 30 into the reserve tank R. 32 allows the brake fluid to flow to the first hydraulic chamber 24 side.

An annular minute gap 33 is formed between the inner surface of the first cylinder hole forming body 20 and the outer surface of the first piston 25. The minute gap 33 is formed through the slits 31. A plurality of communication holes 34 communicating with the liquid chamber 29 and the liquid chamber 30 are provided in the first cylinder hole forming body 20.

By the way, as shown in FIG. 4, the rear end of the first piston 25 is restricted by the rear end contacting a step 21a provided on the inner surface of the intermediate portion of the second cylinder hole forming body 21. The first piston 25 is provided with a plurality of relief holes 35 for communicating the first hydraulic chamber 24 with the minute gap 33 in a state where the first piston 25 is at the retreat limit position. These relief holes 35 release the hydraulic pressure of the first hydraulic chamber 24 to the reserve tank R when the first piston 25 retreats to the retreat limit, and when the first piston 25 advances from the retreat limit position. , Each relief hole 35
Are sealed by the first cup seal 27.

Referring again to FIG. 4, the inner surfaces of the second and third cylinder hole forming bodies 21 and 22 are formed with the first cylinder hole 23.
And a second cylinder hole 38 coaxially opened to the negative pressure booster 2 side, and a flange portion provided at the rear end of the cylinder body 16, that is, at the open end side of the second cylinder hole 38. 16a, 16a are formed so as to project to the left and right sides along one diameter line of the second cylinder hole 38.

The second cylinder hole 38 has a second piston 4
0 is inserted, and in the second cylinder hole forming body 21,
A second hydraulic chamber 39 is formed between the first and second pistons 25,40.

The first and second pistons 25, 40 are connected so as to regulate the maximum distance between the pistons 25, 40.
A second return spring 41 for urging the second piston 40 rearward is contracted between them.

An annular output chamber 42 is formed between the outer periphery of the front part of the second cylinder hole forming body 21 and the cylinder body 16, and a cylinder is formed on both sides of the output chamber 42 at the outer periphery of the second cylinder hole forming body 21. The output chamber 4 contacts the main body 16 resiliently.
A pair of annular seal members 43 and 44 for sealing the two are mounted. The second cylinder hole forming body 21 has a plurality of communication holes 45 for communicating the second hydraulic chamber 39 with the output chamber 42.
The second output port 4B is provided in the cylinder body 16 so as to communicate with the output chamber 42 that communicates with the second hydraulic chamber 39 through the communication holes 45.

Referring also to FIG. 6, the second piston 40
The second and third cylinder hole forming bodies 21 and 22
The third cylinder hole forming body 22 and the support cylinder are sandwiched between the third cylinder hole forming body 22 and the third cup seal 46 while the third cup seal 46 mounted therebetween is resiliently slidably contacted. The fourth cup seal 47 mounted between the lugs 19 slides resiliently.

Between the front end of the third cylinder hole forming body 22 and the rear part of the second cylinder hole forming body 21, an annular replenishing liquid chamber 48 facing the back surface of the third cup seal 46 is formed. An annular liquid chamber 49 communicating with the reserve tank R is formed between the cylinder body 16 and the second cylinder hole forming body 21 and the support cylinder 19 on the rear side of the output chamber 42. An annular seal member 50 which resiliently comes into contact with the cylinder body 16 so as to sandwich the liquid chamber 49 between the outer peripheral portion of the front portion 19 and the seal member 44 mounted on the outer periphery of the second cylinder hole forming body 21. Is attached.

Second cylinder hole forming body 21 and support cylinder 1
9, an annular passage 51 having a front end communicating with the liquid chamber 49 is formed. At a rear end of the second cylinder hole forming body 21, a rear end of the annular passage 51 is connected to the replenishing liquid chamber 48. A plurality of communicating grooves 52 are provided radially. That is, the replenishing liquid chamber 48 and the liquid chamber 49 communicate with each other via the grooves 52 and the annular passage 51.

The second cup seal 46 is located on the front side of the third cup seal 46.
The inner surface of the cylinder hole forming body 21 is provided with a plurality of grooves 53 extending in the axial direction.
Means that the hydraulic pressure in the second hydraulic chamber 39 is increased
When the fluid pressure is lower than the fluid pressure in the replenishing fluid chamber 48 that has passed through the fluid chamber 49 into the reserve tank R, the brake fluid flows from the replenishing fluid chamber 48 to the second fluid pressure chamber 39 through the groove 53. To allow.

An annular minute gap 54 is formed between the inner surface of the third cylinder hole forming body 22 and the outer surface of the second piston 40, and a plurality of communication holes for connecting the minute gap 54 to the grooves 52. 55 are the third cylinder hole forming bodies 22
Is provided.

A plurality of relief holes 58 are provided in the second piston 40 for communicating the second hydraulic chamber 39 with the minute gap 54 in a state where the second piston 40 is at the retreat limit position shown in FIG. These relief holes 58 release the hydraulic pressure in the second hydraulic chamber 39 to the reserve tank R when the second piston 40 retreats to the retreat limit, and the second piston 40
Is moved forward from the retreat limit position, the relief holes 5
8 are sealed by the third cup seal 46.

The second piston 40 is integrally and coaxially connected with an extension cylinder 40a extending rearward and entering the negative pressure booster 2. The booster shell 14 and the extension cylinder 40a of the negative pressure booster 2 are provided. An annular seal member 56 is interposed between them. The front end of the output rod 57 of the negative pressure booster 2 is connected to the second piston 40.

In FIG. 7, the normally open solenoid valve 11 _FL comprises a valve section 60 and a solenoid section 61, and is provided on the cylinder body 16 so as to open on the lower surface 16 b of the cylinder body 16. The valve portion 60 is mounted in the valve mounting hole _64FL , and the solenoid portion 61 is
6 protrudes downward from the lower surface 16b.

The normally open solenoid valve 11_FLWith control valve hand
Step 6_FLNormally closed solenoid valve 13 _FLAre the valve 62 and
And a solenoid 63.
The cylinder is opened to the lower surface 16b of the main body 16.
Valve mounting hole 65 provided in main body 16_FLThe valve part 62 is attached to
The solenoid 63 is mounted on the lower surface 16 of the cylinder body 16.
b protrudes downward.

Other normally open solenoid valves 11 _RR , 11 _RL , 11 _FR
Is configured similarly to the above-described normally-open solenoid valve 11 _FL ,
Valve section 6 of these normally open solenoid valves 11 _RR , 11 _RL , 11 _FR
Valve mounting holes 64 _RR , 64 _RL , 6 for mounting 0 ...
As shown in FIG. 8, _4FR is provided in the cylinder body 16 together with the valve mounting hole _64FL so as to open in the lower surface 16b in a line in the left-right direction at a position near the front surface of the cylinder body 16.

The other normally closed solenoid valves 13 _RR , 13 _RL , 1
3 _FR also the normally closed electromagnetic valve 13 _FL is configured similarly to their normally closed electromagnetic valve 13 _RR, 13 _RL, 13 _FR of the valve portion 62 ... valve mounting hole 65 _RR for allowing mounting the , 6
5 _RL , 65 _FR , as shown in FIG.
_The valve mounting holes 65 _FL , 65 _RR , 65 _RL , 65 _FR are provided in the cylinder body 16 in such a manner that they are arranged in a line in the left and right direction and open to the lower surface 16 b together with the _FL .
_FL , 64 _RR , 64 _RL , and 64 _FR are arranged behind the row.

The first reservoir 7A has a reservoir piston 67 which is slidably fitted into a bottomed reservoir hole 66A provided in the cylinder body 16 so as to open to the lower surface 16b, and an open end of the reservoir hole 66A. , A retaining ring 69 attached to the open end of the reservoir hole 66A so as to prevent the receiving member 68 from being detached from the reservoir hole 66A, a receiving member 68 and a reserve piston 67. A reserve chamber 71 is formed between the closed end of the reservoir hole 66A and the reserve piston 67.

The second reservoir 7B has the same configuration as the first reservoir 7A. A bottomed reservoir hole 66B for slidably fitting the reserve piston 67 of the second reservoir 7B is formed in the lower surface 16b. It is provided on the cylinder body 16 so as to open.

Further, the reservoir hole 66A is provided with the valve mounting hole 6
5 _FL and 65 _RR , the reservoir hole 66B is disposed behind the valve mounting holes 65 _RL and 65 _FR , and the valve mounting holes 64 _FL , 64 _FR , 64 _RL and 64 _RL . _RR ; 6
5 _FL , 65 _FR , 65 _RL , 65 _RR , and reservoir holes 66A,
66B are the first and second cylinders of the master cylinder M.
The cylinder holes 23 and 38 are arranged symmetrically with respect to the vertical plane L including the axis C of the cylinder holes 23 and 38.

The hydraulic path formed in the cylinder body 16 will be described with reference to FIGS. 9 and 10. The outlets of the normally open solenoid valves 11 _FL , 11 _RR , 11 _RL , 11 _FR and the normally open solenoid valves 11 _FL , 11 _RR , 11 _RL , 11 _FR The normally closed solenoid valves 13 _FL , 13 _RR , 13 _RL , 13 _FR which constitute the control valve means 6 _FL , 6 _RR , 6 _RL , 6 _FR together with the solenoid valves 11 _FL , 11 _RR , 11 _RL , 11 _FR are opened. The four passages 72 communicating with each other are formed in the cylinder body 16.
Connection ports 17 _FL , 17 _RR , 17
_RL, 17 respectively in _FR continues to the coaxial cylinder body 16
Is provided.

Each normally open solenoid valve 11_FL, 11_RR, 11_RL,
11_FRValve mounting hole 64_FL, 64
_RR, 64_RL, 64_FRFour entrances extending upward from the inner end of the
Passages 73 and each normally closed solenoid valve 13_FL, 13_RR, 1
3_RL, 13_FRValve mounting hole 6
5_FL, 65_RR, 65_RL, 65_FRExtends upward from the inner end of
The four outlet passages 74 and the normally open solenoid valve 11_FL, 11_RR
Inlet passage 73 ... and the normally open solenoid valve 11_FR, 11_RL
The left and right entrance passages 73 are made to communicate with each other.
A pair of inlet communication passages 75A, 75B extending in
Closed solenoid valve 13_FL, 13 _RRExit passage 74 ... and always
Closed solenoid valve 13_FR, 13_RLOutlet passages 74 are connected to each other.
A pair of outlet-side reams that extend in the left-right direction
Passages 76A and 76B are provided in the cylinder body 16.
The outer end openings of the inlet-side communication passages 75A and 75B are
7 (see FIG. 2), and the outlet side communication passage 7
The outer end openings of 6A and 76B are spherical bodies 78 (see FIG. 2).
Each is closed.

[0050] perpendicular to the inlet passage 73 and the normally closed electromagnetic valve 13 _FL of the outlet passage 74 of the normally open electromagnetic valves 11 _FL, a release passage 79A leading to the storage chamber 71 of the first reservoir 7A so as to communicate, normal open-type orthogonal to the solenoid valve 11 _FR inlet passage 73 and outlet passage 74 of the normally closed electromagnetic valve 13 _FR, and a release path 79B leading to the storage chamber 71 of the second reservoir 7B so as to communicate, the cylinder body 16 The one-way valves 10A, 10B are provided in the cylinder body 16 so as to extend in the front-rear direction from the front side, and between the inlet passage 73 and the outlet passage 74, in their release passages 79A, 79B. Moreover, the outer end openings of the release paths 79A and 79B are closed by spheres 80 (see FIGS. 3 and 7).

The first output hydraulic pressure passage 5A communicating with the first output port 4A of the master cylinder M is connected to a passage portion 81 provided coaxially with the first output port 4A from the left side surface of the cylinder body 16 and provided in the cylinder body 16. , Cylinder body 16
And a passage portion 82 extending downward from the upper surface of the cylinder body 16 so as to intersect with the passage portion 81 and have a lower end connected to the inlet-side passage 75A. The outer end opening of the passage portion 81 is a sphere 83 (See FIGS. 2 and 7)
And the outer end opening of the passage portion 82 is a sphere (not shown)
Respectively.

The second output hydraulic pressure passage 5B communicating with the second output port 4B of the master cylinder M is connected to a passage portion 85 provided in the cylinder body 16 coaxially from the right side of the cylinder body 16 to the second output port 4B. , Cylinder body 16
A passage portion 86 extending rearward from the front surface of the cylinder body at right angles to and communicating with the passage portion 85; And the passage portions 87 provided in the cylinder body 16, and the outer end openings of the passage portions 85 to 87 are respectively closed by spheres (not shown).

On the lower surface 16b of the cylinder body 16, the solenoid 6 of each of the normally open solenoid valves 11 _{FL to} 11 _RR is provided.
1, the solenoids 63 in the normally closed solenoid valves 13 _{FL to} 13 _RR , and the first and second reservoirs 7.
A cover 91 covering A and 7B is an endless seal member 92.
Between the cylinder body 16 and the cylinder body 16.

The cover 91 is formed of a synthetic resin at one end of a first resin molded body 91a formed of a synthetic resin into a tubular shape having a rectangular cross section, so as to cover one end opening of the first resin molded body 91a. The second resin molded body 91b is formed by vibration welding.

First resin molded body 91a on cover 91
A support plate in which the solenoids 61 of the normally open solenoid valves 11 _{FL to} 11 _{RR and} the bus bars 93 to be connected to the solenoids 63 of the normally closed solenoid valves 13 _{FL to} 13 _RR are embedded. The part 94 is formed integrally. Further and substrate 95 is fastened to the first resin molded body 91a, by the semiconductor chip (not shown) or the like is mounted on a substrate 95 an electric circuit is printed, the normally open electromagnetic valves 11 _FL ~ 11
An electronic control unit 96 that controls the operation of the _RR and each of the normally closed solenoid valves 13 _{FL to} 13 _RR is configured.

Further, a connector housing 97 protruding laterally from the cylinder body 16 is provided integrally with the first resin molded body 91a of the cover 91, and the bus bars 93 and the electronic control unit 96 are provided in the connector housing 97. A plurality of continuous connector terminals (not shown) are arranged.

Next, the operation of the first embodiment will be described.
Then, the cylinder body 16 of the master cylinder M is controlled
Valve means 6_FL, 6_RR, 6_RL, 6_FRNormally open solenoid valve
11 _FL, 11_RR, 11_RL, 11_FRAnd normally closed solenoid valve 1
3_FL, 13_RR, 13_RL, 13 _FROf the valve parts 60 ..., 62 ...
Valve mounting hole 64 for mounting_FL, 64_RR, 64_RL, 6
4 _FR; 65_FL, 65_RR, 65_RL, 65_FRAnd the reserve pi
The first 67 and the second 67 are slidably fitted to each other.
Reservoir hole 66 for forming reservoirs 7A and 7B
A and 66B correspond to the second cylinder in the master cylinder M.
Are arranged symmetrically with respect to the vertical plane L including the axis C of the
Is placed.

Therefore, the control valve means 6 _FL , 6 _RR , 6 _RL ,
6 _FR and the reservoirs 7A and 7B
Are arranged on the cylinder body 16 in a symmetrical arrangement with respect to the vertical plane L including the axis C of the cylinder axis C, so that the left and right weights of the cylinder axis C can be balanced. As a result, it is possible to prevent a large rotational moment from acting around the axis C of the second cylinder hole 38 on the fastening portion of the cylinder body 16 to the booster shell 14 of the negative pressure booster 2 and reduce the load on the fastening portion. Can be.

Further, the valve mounting holes 64 _FL , 64 _RR , 64 _RL ,
64 _FR ; 65 _FL , 65 _RR , 65 _RL , 65 _FR and the reservoir holes 66A, 66B are defined by the lower surface 16b of the cylinder body 16.
The valve mounting holes 64 _FL , 64 _RR , 64 _RL , 64 _FR ; 6
5 _FL , 65 _RR , 65 _RL , 65 _FR and reservoir hole 66
A and 66B can be processed simultaneously by a multi-axis drilling machine. Moreover, the normally open solenoid valves 11 _{FL to} 11 _FR and the normally closed solenoid valves 13 _{FL to} 13 _{FR of the} control valve means 6 _{FL to} 6 _FR are mounted on the cylinder body 16 from below, and the reservoirs 7A,
7B are also fitted to the cylinder body 16 from below, so that the control valve means 6 _{FL to} 6 _FR and the reservoirs 7A and 7B can be assembled and removed from the cylinder body 16 from the same direction. Assembly and removal operations are facilitated.

On the lower surface 16b of the cylinder body 16,
The cover 91 containing the electronic control unit 96 is fastened, but the electronic control unit 96 and the cover 91 are lightweight, and the weight balance on the left and right of the cylinder axis C is not lost by the cover 91 and the electronic control unit 96. When the cover 91 is fastened to the cylinder body 16, a large load does not act on the fastening portion of the cylinder body 16 to the booster shell 14.

[0061] Further, the control valve means 6 _FL to 6 _FR connection port 17 for to output the controlled brake fluid pressure in _FL, 1
Since 7 _RR , 17 _RL , and 17 _FR are arranged side by side on the front surface of the cylinder body 16, it is possible to share the brake fluid pressure control device of the present invention with a left-hand drive vehicle and a right-hand drive vehicle, and to use brake piping. The length of the pipe can be shortened while increasing the degree of freedom of the layout. That is,
In the brake fluid pressure control device disclosed in Japanese Patent Publication No. 0-67310, each connection port is provided in parallel on one of the left and right side surfaces of the cylinder body. Therefore, for example, when the brake fluid pressure control device in which the connection port is set on the left side of the cylinder body so as to be conveniently mounted on a right-hand drive vehicle is directly applied to a left-hand drive vehicle, the left side of the cylinder body As the empty space becomes smaller, not only the degree of freedom in the layout of the brake pipe is reduced, but also the length of the pipe of the brake pipe becomes longer. Therefore, in order to avoid such a problem, a brake fluid pressure control device provided with each connection port on the left side of the cylinder body for adapting to a right-hand drive vehicle and a cylinder for adapting for a left-hand drive are provided. It is necessary to prepare a brake fluid pressure control device provided with each connection port on the right side of the main body. On the other hand, when the connection ports 17 _{FL to} 17 _FR are arranged in parallel on the front surface of the cylinder body 16 as in the first embodiment, the degree of freedom of the layout of the brake pipe is limited by the right-hand drive and left-hand drive vehicles. Therefore, the layout flexibility can be increased, and the pipe length of the brake pipe does not greatly differ between right-hand drive and left-hand drive vehicles, and can be set as short as possible.

FIG. 11 shows a modification of the first embodiment.
Yes, connection port 17_FL, 17_FROpening direction is upward
And connection port 17_RL, 17_RROpening direction is left and right outward
May be set to the connection port 17_RL, 17
_RROpening direction of connection port 17 _FL, 17_FRAs well as upward
May be set at the moment.

FIGS. 12 and 13 show a second embodiment of the present invention. A connection port 17 _RR corresponding to the right rear wheel is provided on the left side of the cylinder body 16 (see FIGS. 2 to 8).
And a connection port 17 _FL corresponding to the left front wheel are provided so that the connection port 17 _FL is arranged behind the connection port 17 _RR , and a connection corresponding to the left rear wheel is provided on the right side surface of the cylinder body 16. and port 17 _RL, a connection port 17 _FR corresponding to the right front wheel is provided so as to connect the port 17 _FR are arranged in the rear side of the connection port 17 _RL.

Thus, between the connection ports 17 _RR and 17 _RL ,
The valve mounting holes 64 _RR , 65 _RR , 65 _RL , 64 _RL are arranged in a line from the left side to the right side of the cylinder body 16, and the valve mounting holes are provided between the connection ports 17 _FL , 17 _FR. The valve mounting holes 64 _FL , 65 _FL , 65 _FR , 64 _FR corresponding to the holes 64 _RR , 65 _RR , 65 _RL , 64 _RL are arranged in a line. In addition, reservoir holes 66A, 66B
Is disposed on the rear side of the valve mounting hole 65 _FL, 65 _FR, the valve mounting hole _{64 FL, 64 FR, 64 RL} , 64 RR; 6
5 _FL , 65 _FR , 65 _RL , 65 _RR , and reservoir holes 66A,
66B are the first and second cylinders of the master cylinder M.
The cylinder holes 23 and 38 are arranged symmetrically with respect to the vertical plane L including the axis C of the cylinder holes 23 and 38.

The inlet passage 73 extending upward from the inner ends of the valve mounting holes 64 _RR and 64 _{FL and} the inlet passage 73 extending upward from the inner ends of the valve mounting holes 64 _RL and 64 _FR are formed as inlet-side communicating passages extending in the front-rear direction. 98A and 98B communicate with each other. The outlet passage 74 extending upward from the inner ends of the valve mounting holes 65 _RR , 65 _{FL and} the outlet passage 74 extending upward from the inner ends of the valve mounting holes 65 _RL , 65 _FR are provided with an outlet-side communication passage 99A extending in the front-rear direction. , 99B and to the inner ends of the reservoir holes 66A, 66B, respectively.

Inlet passage 7 connected to the inner end of valve mounting hole 64 _RR
3 and an outlet passage 74 connected to the inner end of the valve mounting hole 65 _RR
Are communicated with each other through a communication passage 100A orthogonal to the inlet-side communication passage 98A and the outlet-side communication passage 99A.
Inlet passage 73 connected to the inner end of _RL and valve mounting hole 65 _RL
Outlet passage 74 communicating with the inner end of is communicated with each other communicating path 100B which is perpendicular to the inlet side communication passage 98 _B and the outlet-side communication passage 99 _B. The other end of the first output hydraulic pressure passage 5A, one end of which is connected to the first output port 4A, is connected to the intermediate portion of the communication passage 100A, and the other end of the second output hydraulic pressure passage 5B, one end of which is connected to the second output port 4B. Is communicated with an intermediate portion of the communication path 100B.

Further, the first and second output hydraulic pressure paths 5A, 5A
One-way valves 10A and 10B are provided in the communication paths 100A and 100B on the outlet communication paths 99A and 99B side of the connection point of B.

According to the second embodiment, effects similar to those of the first embodiment can be obtained.

FIG. 14 shows a modification of the second embodiment, in which the opening directions of the connection ports 17 _RR , 17 _FL ; 17 _RL , 17 _FR may be set upward.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the appended claims. It is possible to do.

For example, in each of the embodiments described above, the case where the control valve means is constituted by a normally-open solenoid valve and a normally-closed solenoid valve has been described. However, a state in which the wheel brake is communicated with the master cylinder and is disconnected from the reservoir. A brake that uses a three-port three-position electromagnetic switching valve capable of switching between a state in which the wheel brake communicates with the reservoir and is disconnected from the master cylinder and a state in which the wheel brake is disconnected from the master cylinder and the reservoir. The present invention is also applicable to a hydraulic pressure control device.

[0072]

As described above, according to the present invention, the load of the fastening portion on the support member of the master cylinder can be reduced by balancing the weight on the left and right sides of the axis of the cylinder hole. The assembling and removing operations of the means and the reservoir with respect to the cylinder body can be performed from the same direction, so that the assembling and removing operations can be facilitated.

[Brief description of the drawings]

FIG. 1 is a hydraulic circuit diagram of a vehicle brake hydraulic pressure control device according to a first embodiment.

FIG. 2 is a side view of a negative pressure booster and a brake fluid pressure control device.

FIG. 3 is an enlarged view as viewed in the direction of arrow 3 in FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 3;

FIG. 5 is an enlarged view of a part viewed from the arrow 5 in FIG. 4;

FIG. 6 is an enlarged view of a part viewed from an arrow 6 in FIG. 4;

FIG. 7 is a sectional view taken along line 7-7 of FIG. 3;

FIG. 8 is a bottom view of the cylinder body as viewed from the direction of arrows 8-8 in FIG. 7;

FIG. 9 is a perspective view showing a hollow portion in the cylinder main body in a see-through manner.

FIG. 10 is a perspective view of the hollow portion in the cylinder main body as viewed from the direction of arrow 10 in FIG. 9;

FIG. 11 is a perspective view corresponding to FIG. 9 of a modification of the first embodiment.

FIG. 12 is a perspective view showing a hollow portion in a cylinder main body in a second embodiment in a see-through manner.

FIG. 13 is a perspective view of a hollow portion in the cylinder main body as viewed from a direction indicated by an arrow 13 in FIG.

FIG. 14 is a perspective view corresponding to FIG. 12 of a modification of the second embodiment.

[Description of _Signs ] 6 _FL , 6 _FR , 6 _RL , 6 _RR Control valve means 7A, 7B Reservoir 14 Booster shell as a support member 16 Cylinder body 16b Cylinder Lower surface of main body 38 ... Cylinder hole _64FL , _64FR , _64RL , _64RR , _65FL , _65FR , 6
5 _RL, 65 _RR ... valve mounting hole 66A, 66B ... reservoir port 67 ... reserve piston _{B FL, B FR, B RL} , the axis L of the B _RR ... wheel brake C ... cylinder bore・ ・ ・ Vertical surface M ・ ・ ・ Master cylinder R ・ ・ ・ Reserve tank

Claims (1)

[Claims] 1. A cylinder body (16) of a master cylinder (M) is provided with a reserve tank (R) and a cylinder hole (38).
8) at a plurality of locations around the open end of the cylinder body (1).
6) is fastened to the fixed support member (14), and when the master cylinder (M) is returned, the master cylinder (M)
Reservoirs (7A, 7B) for storing brake fluid by allowing the brake fluid to return to the side, a master cylinder (M) and wheel brakes ( _BFL , _BFR , _BRL , _BRR )
Control valve means capable of controlling the fluid pressure of the wheel brakes (B _FL -B _RR ) by switching the communication / block between the wheel brakes (B _FL -B _RR ) and the reservoirs (7A, 7B). 6 _FL , 6 _FR , 6 _RL , 6 _RR ) are connected to the control valve means (6 _FL , 6 _FR , 6 _RL , 6 _RL ) in the vehicle brake fluid pressure control device disposed in the cylinder body (16). _RR ) mounting holes (64 _FL , 64 _FR , 64 _RL , 64
_RR ; 65 _FL , 65 _FR , 65 _RL , 65 _RR ) and the reserve piston (67) are slidably fitted to each other to form a reservoir (7).
A, 7B) to form reservoir holes (66A, 66A).
B) and the lower surface (16b) of the cylinder body (16).
The valve mounting hole (64 _FL- 64 _RR ; 65 _FL- 65 _RR )
And a brake fluid pressure control device for a vehicle, wherein the reservoir holes (66A, 66B) are arranged symmetrically with respect to a vertical plane (L) including an axis (C) of the cylinder hole (38).