JP2003327108A - Brake hydraulic pressure control device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To miniaturize a brake hydraulic pressure control device for a vehicle by minimizing a free space occurring in a storing chamber in a part corresponding to a reservoir, in the brake hydraulic pressure control device where the storing chamber for storing an electromagnetically driving part and an electronic control unit is formed between a first mounting surface of a substrate and a housing. <P>SOLUTION: A cylindrical part 15c rising to project from the first mounting surface 15a to the storing chamber 62 side is integrally disposed in the substrate 15. The reservoir 8A comprises a closed-end sliding hole 36 disposed in the substrate 15 so that at least a part is formed in the inner surface of the cylindrical part 15c, a reserve piston 38 slidably engaged with the sliding hole 36 so as to form a reserve chamber 37 between it and the blocking end of the sliding hole 36, a spring receiving member 39 mounted to the tip of the cylindrical part 15c, and a reserve spring 40 contracted and disposed between the reserve piston 38 and the spring receiving member 39. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle brake fluid pressure control device, and more particularly to a reservoir, a return pump, a damper, a master cylinder and a base body having first and second mounting surfaces facing each other. An electromagnetically driven inlet valve for switching communication / blocking between the wheel brakes and an electromagnetically driven outlet valve for switching communication / blocking between the wheel brakes and the reservoir make the electromagnetic drive section of each valve protrude from the first mounting surface. And a housing mounted on the first mounting surface and a housing chamber for housing the electromagnetic drive unit and the electronic control unit, and the electric motor is fastened to the second mounting surface. Relates to an improvement of a brake fluid pressure control device for a vehicle.

[0002]

2. Description of the Related Art Conventionally, such a device is disclosed in, for example, Japanese Unexamined Patent Application Publication No.
It is already known from the publication No. 00-168529.

[0003]

However, in the above-mentioned conventional apparatus, the reservoir is arranged on the base body such that the spring bearing member, which is one of the constituent elements, slightly protrudes from the first mounting surface. Therefore, there is a large empty space in the storage chamber at the portion corresponding to the reservoir. Therefore, the volume of the storage chamber is unnecessarily large, and in order to downsize the brake fluid pressure control device, it is desirable to make the empty space as small as possible.

The present invention has been made in view of the above circumstances, and has a brake fluid pressure control for a vehicle, which is capable of miniaturizing the empty space generated in the storage chamber in a portion corresponding to the reservoir as much as possible. The purpose is to provide a device.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 is to a substrate having first and second mounting surfaces facing each other, and a reservoir and pumping from the reservoir. A return pump that returns the brake fluid to the master cylinder side, a damper connected to the discharge side of the return pump, and communication between the master cylinder and the wheel brakes.
An electromagnetically driven inlet valve for switching shutoff and an electromagnetically driven outlet valve for switching communication / shutoff between the wheel brake and the reservoir are arranged such that the electromagnetic drive portions of the respective valves project from the first mounting surface. A housing chamber for housing the electromagnetic drive unit and an electronic control unit for controlling energization of the electromagnetic drive unit is formed between the housing mounted on the first mounting face and the first mounting face, and the return chamber is provided. In a vehicle brake fluid pressure control device in which an electric motor for driving a pump is fastened to the second mounting surface, the first base is provided on the base body.
A tubular portion is integrally provided so as to project from the attachment surface to the storage chamber side, and the reservoir is provided on the base body such that at least a part of the reservoir is formed on the inner surface of the tubular portion. And a reserve piston slidably fitted in the sliding hole so that a storage chamber connected to the outlet valve is formed between the sliding hole and the closed end of the sliding hole; It is characterized by comprising a spring receiving member attached to the tip of the portion, and a reserve spring contracted between the reserve piston and the spring receiving member.

According to this structure, a part of the reservoir is arranged in the storage chamber, so that the empty space in the storage chamber in the portion corresponding to the reservoir can be made as small as possible, and the reservoir can be arranged. Since the space required on the base side for installation can be reduced by the amount of the empty space in the storage chamber, it is possible to reduce the size and weight of the brake fluid pressure control device.

The invention according to claim 2 is the above-mentioned claim 1.
In addition to the configuration of the invention described above, the damper is disposed on the base between the closed end of the sliding hole and the second mounting surface. By arranging a part of the inside of the storage chamber to effectively utilize the space generated in the base body, the damper is arranged to further reduce the size and weight of the base body and further reduce the size and weight of the brake fluid pressure control device. be able to.

Further, in the invention according to claim 3, in addition to the structure of the invention according to claim 1, a breathing structure which allows breathing of the storage chamber and passes between the storage chamber and the outside is provided in the base body. Characteristically, according to such a configuration, it is possible to breathe the storage chamber, and the breathing volume is reduced by the volume of the storage chamber, so that the breathing structure can be downsized.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below based on an embodiment of the present invention shown in the accompanying drawings.

1 to 13 show an embodiment of the present invention. FIG. 1 is a brake hydraulic circuit diagram of a four-wheeled vehicle brake device, and FIG. 2 is a front view of a brake hydraulic pressure control device.
3 is a plan view taken along arrow 3 of FIG. 2, FIG. 4 is a sectional view taken along line 4-4 of FIG. 2, FIG. 5 is a sectional view taken along line 5-5 of FIG. 2, and FIG.
Line sectional view, FIG. 7 is a cutaway sectional view taken along line 7-7 of FIG.
FIG. 8 is an enlarged view of a main part of FIG. 5, and FIG.
9 is a view as seen from the direction of arrow 9-9, FIG. 10 is a plan view of the bus bar assembly, FIG. 11 is an enlarged cross-sectional view taken along line 11-11 of FIG. 7,
FIG. 12 is a cross-sectional view of the bus bar side connection pad, and FIG.

First, in FIG. 1, a tandem type master cylinder M is provided with first and second output ports 1A and 1B for generating a brake fluid pressure according to a pedaling force applied to a brake pedal P by a vehicle driver, The left front wheel wheel brake 2A, the right rear wheel wheel brake 2B, the right front wheel wheel brake 2C and the left rear wheel wheel brake 2D, and the first individually connected to the first and second output ports 1A and 1B.
A brake fluid pressure control device 4 is provided between the second output fluid pressure passages 3A and 3B.

The brake fluid pressure control device 4 is a normally open type that individually corresponds to the left front wheel wheel brake 2A, the right rear wheel wheel brake 2B, the right front wheel wheel brake 2C, and the left rear wheel wheel brake 2D. Electromagnetically driven first, second, third
And the fourth inlet valves 5A, 5B, 5C, 5D, and the electromagnetically driven first, second, third and fourth outlet valves 6A, which are normally closed and individually correspond to the wheel brakes 2A to 2D. 6
B, 6C, 6D, first, second, third and fourth check valves 7A, 7B, 7C, 7D connected in parallel to the respective inlet valves 5A-5D, and first and second output liquids. First and second corresponding individually to the pressure paths 3A and 3B
Reservoirs 8A, 8B and first and second reservoirs 8A,
Plunger type first and second return pumps 9A and 9B whose suction side is connected to 8B, a single electric motor 10 that drives both pumps 9A and 9B, and discharge sides of the first and second pumps 9A and 9B To the first and second dampers 11A and 11B, and the first and second output hydraulic pressure passages 3A and 3A,
3B and the first and second orifices 12A and 12B interposed between the first and second dampers 11A and 11B, respectively.
With.

The first inlet valve 5A is provided between the first output hydraulic pressure passage 3A and the left front wheel wheel brake 2A, and the second inlet valve 5B is provided between the first output hydraulic pressure passage 3A and the right rear wheel wheel brake. 2B, a third inlet valve 5C is provided between the second output hydraulic pressure passage 3B and the right front wheel wheel brake 2C, and a fourth inlet valve 5D is provided between the second output hydraulic pressure passage 3B and the left rear wheel. It is provided between the wheel brakes 2D.

The first to fourth check valves 7A to 7D are
Corresponding wheel brakes 2A-2D to master cylinder M
The inlet valves 5A to 5D are connected in parallel so as to allow the flow of the brake fluid to the inlet valves 5A to 5D.

The first outlet valve 6A is provided between the left front wheel wheel brake 2A and the first reservoir 8A, and the second outlet valve 6B is provided between the right rear wheel wheel brake 2B and the first reservoir 8A. The third outlet valve 6C is provided between the right front wheel brake 2C and the second reservoir 8B, and the fourth outlet valve 6C
The outlet valve 6D is provided between the left rear wheel wheel brake 2D and the second reservoir 8B.

The first to fourth inlet valves 5A to 5D and the first to fourth outlet valves 6A to 6D as described above are used in the master cylinder M and the wheel brake 2A during normal braking in which the wheels are not likely to be locked. 2D to 2D are communicated with each other, and the wheel brakes 2A to 2D and the reservoirs 8A and 8B are shut off. That is, each inlet valve 5A-
5D is demagnetized and opened, and each outlet valve 6A-
6D is demagnetized and closed, and the first cylinder of the master cylinder M
The brake fluid pressure output from the output port 1A acts on the left front wheel wheel brake 2A via the first inlet valve 5A, and also acts on the right rear wheel wheel brake 2B via the second inlet valve 5B. Further, the brake fluid pressure output from the second output port 1B of the master cylinder M is equal to the third inlet valve 5
It acts on the wheel brake 2C for the right front wheel via C, and the wheel brake 2D for the left rear wheel via the fourth inlet valve 5D.
Act on.

When the wheels are about to enter the locked state during the braking, the first to fourth inlet valves 5A to 5D and the first to fourth outlet valves 6A to 6D are operated by the master cylinder M.
The wheel brakes 2A to 2D are cut off and the wheel brakes 2A to 2D and the reservoirs 8A and 8B are communicated with each other. That is, the first to fourth inlet valves 5
Of the A to 5D, the inlet valve corresponding to the wheel that is about to enter the locked state is excited and closed, and the first to fourth
Of the outlet valves 6A to 6D, the outlet valve corresponding to the wheel is excited and opened. As a result, a part of the brake fluid pressure of the wheel that is about to enter the locked state is absorbed by the first reservoir 8A or the second reservoir 8B, and the brake fluid pressure of the wheel that is about to enter the locked state is reduced. It will be.

When the brake fluid pressure is kept constant, the first to fourth inlet valves 5A to 5D and the first to fourth outlet valves 6A to 6D connect the wheel brakes 2A to 2D to the master cylinder M and the reservoir. It is controlled to shut off from 8A and 8B. That is, the inlet valves 5A to 5D are excited and closed, and the outlet valves 6A to 6D are demagnetized and closed. When the brake fluid pressure is further increased, the inlet valves 5A to 5D are demagnetized and opened, and the outlet valve 6 is released.
It suffices that A to 6D be demagnetized and closed.

By controlling the energization of the first to fourth inlet valves 5A to 5D and the first to fourth outlet valves 6A to 6D in this manner, the wheels can be efficiently braked without being locked.

By the way, the electric motor 10 is operated during the antilock brake control as described above.
Since the first and second return pumps 9A and 9B are driven according to the operation of the electric motor 10, the brake fluid absorbed in the first and second reservoirs 8A and 8B is the first and second return pumps 9A. , 9B, then discharged to the side of the first and second dampers 11A, 11B, and through the first and second orifices 12A, 12B.
It is returned to the output hydraulic pressure passages 3A and 3B. By such circulation of the brake fluid, the first and second reservoirs 8A, 8
It is possible to prevent an increase in the depression amount of the brake pedal P due to the absorption of the brake fluid of B. Moreover, the first and second
The pulsation of the discharge pressure of the return pumps 9A and 9B is the first and the second.
Since the dampers 11A and 11B and the first and second orifices 12A and 12B are damped by the cooperative action,
The operation feeling of the brake pedal P is not hindered by the recirculation.

2 to 7, the brake fluid pressure control device 4 includes first and second mounting surfaces 1 facing each other.
A base 15 having 5a and 15b and formed in a block shape from, for example, an aluminum alloy is provided. The base 15 has first to fourth inlet valves 5A to 5D and first to fourth outlet valves. 6A to 6D, first to fourth check valves 7A
7D, 1st and 2nd reservoir 8A, 8B, 1st and 2nd return pump 9A, 9B, 1st and 2nd damper 1
1A, 11B, and first and second orifices 12
A and 12B are arranged. A resin housing 16 is mounted on the first mounting surface 15a of the base 15 via an endless first seal member 13, and an electric motor is mounted on the second mounting surface 15b of the base 15 on the side opposite to the housing 16. 1
The zero motor case 17 is attached through the endless second seal member 14.

With reference to FIG. 8 together, the first to fourth inlet valves 5A to 5D are formed by connecting the valve portion 18 and the electromagnetic drive portion 19 to each other. 15
The valve portions 18 are housed in four bottomed mounting holes 20 provided in the upper portion of the base 15 so as to open at a.
Each electromagnetic drive portion 19 ... projects from the first mounting surface 15a of the base 15.

Further, input chambers 21 ... Are formed between the tip portions of the valve portions 18 ... And the closed ends of the mounting holes 20. On the other hand, on both sides of the upper part of the second mounting surface 15b of the base 15 which is separated from the electric motor 10, the master cylinder M
Connection boss 2 having a first inlet port 23A to which a first output hydraulic passage 3A connected to the first output port 1A of
2A and a second inlet port 23 to which the second output hydraulic pressure passage 3B connected to the second output port 1B of the master cylinder M is connected.
A second connection boss 22B having B is provided so as to project, and the input chambers 21 ... Of the first and second inlet valves 5A, 5B are commonly communicated with the first inlet port 23A, and the third and fourth inlet valves are provided. The input chambers 21 of 5C and 5D are commonly communicated with the second inlet port 23B.

An annular chamber 24 is formed between the intermediate portion of each valve portion 18 and the inner surface of each mounting hole 20. Between the annular chamber 24 and the input chamber 21. On the outer periphery of the valve portions 18 ..., a cup seal that functions as the check valves 7A to 7D that allows the brake fluid to flow from the annular chamber 24 ... to the input chamber 21. Check valves 7A to 7D are attached so that they come into contact with each other.
At the same time, O-rings 25, which are elastically contacted with the inner surfaces of the mounting holes 20, are mounted on the outer circumference of the valve portions 18 at positions sandwiching the annular chambers 24.

On the upper side surface of the base 15, an outlet port 26A individually connected to the left front wheel brake 2A, the right rear wheel brake 2B, the right front wheel brake 2C and the left rear wheel brake 2D, 26B, 26C, 26D
Are provided corresponding to the inlet valves 5A to 5D, and the annular chambers 24 of the inlet valves 5A to 5D are connected to the outlet ports 26.
A-26D are connected respectively.

Thus, when the electromagnetic drive units 19 ... Are not energized, the valve units 18 ... Communicate between the annular chambers 24 ... And the input chambers 21. The output hydraulic pressure of the master cylinder M causes the wheel brakes 2A. Works on ~ 2D. When the electromagnetic drive units 19 ... Are energized, the valve units 18 ...
, The output hydraulic pressure of the master cylinder M does not act on the wheel brakes 2A to 2D.

The first to fourth outlet valves 6A to 6D have a valve portion 28.
The electromagnetic drive parts 29 are connected in series to each other, and four bottomed mounting holes 3 are provided on the upper part of the base 15 so as to open to the first mounting surface 15a of the base 15.
Each of the valve portions 28 is housed in 0 ..., and each of the electromagnetic drive portions 29 is projected from the first mounting surface 15a of the base 15.

Moreover, the mounting holes 20 for accommodating the valve portions 18 of the first to fourth inlet valves 5A to 5D are arranged side by side in the lateral direction.
5 is provided on the upper part of the first to fourth outlet valves 6A
The mounting holes 30 for accommodating the valve portions 28 of 6D to 6D are provided on the base body 15 side by side in the lateral direction below the mounting holes 20 and each of the first to fourth inlet valves 5A to 5D. The first to fourth outlet valves 6A to 6D are arranged on the base 15 in parallel in the vertical direction.

Tip portions of the valve portions 28 ... And mounting holes 30.
Opening chambers 31 are formed between the closed ends of. Further, between the intermediate portion of each valve portion 28 ... And the inner surface of each mounting hole 30 ... Communicates with the annular chamber 24 of each of the inlet valves 5A to 5D through a communication hole 32 provided in the base 15. Ring room 33 ...
Are formed, and O-rings 34 and 35 that are elastically contacted with the inner surfaces of the mounting holes 30 are mounted on the outer periphery of the valve portions 28 at positions sandwiching the annular chambers 33.

In the energized state of the electromagnetic drive unit 29, the valve units 28 communicate with each other between the annular chamber 33 and the release chamber 31 and the hydraulic pressure of the wheel brakes 2A to 2D is released.
… Released to the side. When the electromagnetic drive units 29 ... Are de-energized, the valve units 28 ...
.. are cut off and the hydraulic pressures of the wheel brakes 2A to 2D are not released to the release chamber 31 side.

The first reservoir 8A is provided between the first and second inlet valves 5A and 5B and the first and second outlet valves 6A and 6A.
It is arranged under the base 15 at a position corresponding to between B, and
The reservoir 8B is disposed below the base 15 at a position corresponding to between the second and third inlet valves 5C and 5D and between the third and fourth outlet valves 6C and 6D.

Paying particular attention to FIG. 5, a pair of cylindrical shapes are formed on the base 15 at the portions corresponding to the first and second reservoirs 8A and 8B so as to project from the first mounting surface 15a toward the housing 16 side. The parts 15c ... Are integrally provided.

The first reservoir 8A has a bottomed sliding hole 36 provided in the base 15 such that at least a part of the inner surface of the tubular portion 15c is formed, and the first and second outlet valves 6 are provided.
A slide chamber 3 is formed so as to form a storage chamber 37 that communicates with the release chambers 31 of A and 6B in common with the closed end of the slide hole 36.
6, a reserve piston 38 slidably fitted in 6, a spring receiving member 39 attached to the tip of the tubular portion 15c,
It comprises a reserve piston 38 and a reserve spring 40 that is contracted between the spring receiving members 39.

The spring bearing member 39 is fitted into the opening end of the sliding hole 36, and the sliding hole 36 of the spring bearing member 39 is fitted.
A retaining ring 41 for preventing the slipping out of the sliding hole 36 is attached to the inner surface of the opening end of the sliding hole 36.

The second reservoir 8B has a third and a fourth reservoir.
A storage chamber 37 that communicates with the release chambers 31 of the outlet valves 6C and 6D in common is provided, and the storage chamber 37 has basically the same structure as the reservoir 8B.

The first and second dampers 11A and 11B are
It is arranged on the base 15 between the closed ends of the sliding holes 36 ... In the first and second reservoirs 8A and 8B and the second mounting surface 15b of the base 15.

With particular attention to FIG. 7, the first and second dampers 11A and 11B are provided with bottomed damper holes 44, ... A damper chamber 45 is formed between the closed end of the damper hole 44 and the lid member 46 that is fitted in a liquid-tight manner at the opening end of the damper hole 44, and the damper hole 4 of the lid member 46.
Damper hole 44 so as to prevent it from coming out of 4 ...
And a retaining ring 47 attached to the opening edge of the damper chamber 45 of both dampers 11A and 11B are connected to the discharge sides of the first and second return pumps 9A and 9B. It

The first and second return pumps 9A and 9B are
Between the first to fourth outlet valves 6A to 6D and the first and second dampers 11A and 11B, the first to fourth outlet valves 6A to 6D.
Of the return pumps 9A and 9B, each of which is provided on the base 15 with a coaxial operating axis extending in the arrangement direction of the plungers 48 ... At the center of the second mounting surface 15b of the base 15. The recesses 49 are provided so that one ends thereof face each other, and the recesses 49 are arranged at positions spaced from each other. Further, both return pumps 9A and 9B have suction valves 50 ... And discharge valves 51 ...

First and second orifices 12A, 12B
Is the discharge valve 51 of the first and second return pumps 9A, 9B.
... and the inlet port 23 connected to the master cylinder M
It is press-fitted into the base 15 so as to be interposed between A and 23B.

The motor case 17 of the electric motor 10 is formed in a cylindrical shape with a bottom, and a resin brush holder 53 is liquid-tightly fitted into the opening end of the motor case 17 so that the opening end of the motor case 17 is closed. Is closed with a lid plate 54. In addition, the open end of the motor case 17 has the endless second seal member 14 interposed between the open end and the second mounting surface 15b, so that the second end
A plurality of, for example, three screw members 52 ... Are attached to the mounting surface 15b.
It is concluded by.

The output shaft 55 of the electric motor 10 rotatably penetrates the brush holder 53 and the cover plate 54, and the base 15
Is extended to the inside of the recess 49 provided in the
Are supported by a ball bearing 56 held by the ball bearing 57 and a ball bearing 57 held by the inner end of the recess 49. Moreover, the output shaft 55 is provided with an eccentric shaft portion 55a at an intermediate portion located between the bearings 56 and 57, and the ball bearing 58 mounted on the outer periphery of the eccentric shaft portion 55a includes the first and second bearings. The tips of the plungers 48 of the pumps 9A and 9B are brought into contact with each other. Therefore,
When the output shaft 55 rotates by the operation of the electric motor 10, eccentric motion is given to the ball bearing 58 via the eccentric shaft portion 55a, whereby the plungers 48 ... Are reciprocally driven.

The housing 16 includes an electromagnetic drive unit 19 in the first to fourth inlet valves 5A to 5D, the first to fourth units.
The electromagnetic drive units 29 ... In the outlet valves 6A to 6D, the electromagnetic drive units 19 ..., 29 ..., and the electronic control unit 61 that controls the electric motor 10 are housed, and part of the first and second reservoirs 8A, 8B. Cylindrical part 1
A storage chamber 62 into which 5c is inserted is formed between the first mounting surface 15a of the base 15 and is fastened to the first mounting surface 15a of the base 15 by a plurality of, for example, four screw members 66. It

The housing 16 is made of a resin in which one end of the housing main body 64 is closed at one end of the housing main body 64 which is formed by integrally joining a plurality of resin moldings and is formed in a tubular shape having a rectangular cross section. The cover 65 is formed by vibration welding, and the other end of the housing main body 64 in which the first seal member 13 is interposed between the first seal member 13 and the first mounting surface 15a is composed of a plurality of, for example, four screw members 66, 66. It is fastened to the first mounting surface 15 a of the base 15.

Referring also to FIG. 9, the housing main body 6
In the middle portion of 4, the electromagnetic drive portions 19 of the first to fourth inlet valves 5A to 5D, and the first to fourth outlet valves 6A to 6D.
Are integrally formed with support plates 69 having openings 67, 68, respectively corresponding to the electromagnetic drive units 29 ,.

The housing main body 64 includes the support plate portion 6
Four boss portions 70, 70 protruding from 9 toward the cover 65
Are integrally provided so as to correspond to the four corners of the rectangle. On the other hand, the electronic control unit 61 is configured by mounting a semiconductor chip (not shown) or the like on a rectangular electronic board 71 on which an electric circuit is printed, and the electronic board 71 has the boss portions 70, 70. ... are fastened to each other by screw members 72, 72.

By the way, the support plate portion 69 has eight individual bus bars 73A, 73B, 73 as shown in FIG.
C, 73D; 74A, 74B, 74C, 74D and 1
The individual common busbars 75 are embedded, and the individual busbars 73A to 73D and 74A to 74D are provided with respective inlet valves 5A to 5A.
D and the outlet valves 6A to 6D individually, and the common bus bar 75 includes the inlet valves 5A to 5D and the outlet valves 6A to 6D.
Commonly corresponds to D.

Each of the individual bus bars 73A to 73D, 74
One end of each of A to 74D is formed as a rectangular bus bar-side connection pad 76, which has both ends buried in the housing main body 64, and is exposed to the surface of the housing main body 64 outside the electronic substrate 71 so as to be close to each other. While arranged in parallel. Further, one end of the common bus bar 75 is formed as a rectangular bus bar side connection pad 77 having both ends buried in the housing main body 64, and the bus bar side is separated from the parallel position of the bus bar side connection pads 76. The connection pads 76 are arranged so as to be arranged side by side so as to be exposed on the surface of the housing main body 64 outside the electronic substrate 71.

Each of the individual bus bars 73A to 73D, 74
The other ends of A to 74D are formed as external connection terminals 78 ... And project one into each of the openings 67. Eight external connection terminals 79 ... Are integrally formed at the other end of the common bus bar 75, and these external connection terminals 79 ...
8 ... at the positions adjacent to 8 ...
Projected inside. That is, each external connection terminal 78 ..., 7
9 are supported by the support plate portion 69 so as to partially project from the support plate portion 69 of the housing main body 64 into the openings 67.

The external connection terminals 78, ..., 79 are formed in a substantially L-shape, and are a pair of terminals on the electromagnetic drive portions 19, ..., 29 ... Side of the inlet valves 5A to 5D and the outlet valves 6A to 6D. 83 ... are the external connection terminals 78 ..., 79 ...
Is connected by spot welding or the like.

By the way, each of the individual bus bars 73A to 7A
The 3D, 74A to 74D and the common bus bar 75 are prepared as a bus bar assembly 80 having the shape shown in FIG. 10 before being integrally molded with the resin molded body forming the support plate portion 69 in the housing main body 64. Yes, Figure 1
After being cut along a cutting line 81 indicated by a chain line 0, it is positioned and arranged in a mold device for molding a resin molded body that constitutes the support plate portion 69. Moreover, the support plate portion 69 is formed with punched holes 82 ... At a plurality of locations (8 locations in this embodiment) where the connection of the individual bus bars 73A to 73D, 74A to 74D and the common bus bar 75 can be released. After the plate portion 69 is molded, the individual bus bars 73A to 73D, 74A to 7 are punched in the support plate portion 69 by punching from the punching holes 82 ...
The 4D and the common bus bar 75 are arranged independently of each other.

Referring also to FIG. 11, the housing 16
Is integrally formed with a protruding portion 16a protruding laterally from the base body 15. The protruding portion 16a is provided with a connector housing 85. Inside the connector housing 85, there are a plurality of male types. Connector terminals 86 are arranged.

A plurality of bus bars 87 are embedded from the connector housing 85 to the outside of the electronic substrate 71. One end of each of the bus bars 87 is a rectangular bus bar side connection pad whose both ends are embedded in the housing main body 64. 88, which are formed on the outer surface of the electronic substrate 71, are exposed on the surface of the housing main body 64 and are arranged in parallel while being close to each other. Also, the connector terminal 86
Is integrally formed at the other end of each bus bar 87.

A pair of bus bars 89 ... Are embedded in the housing main body 64 at positions corresponding to the arrangement of the bus bar side connection pads 76 ... And between the bus bar side connection pads 77. One end of each of the bus bars 89. Each of them is formed as a rectangular bus bar-side connection pad 90 to be buried in the housing main body 64, and is arranged outside the electronic substrate 71 at a position corresponding to the arrangement of the bus bar side connection pads 76 and the bus bar side connection pad 77. They are exposed on the surface and arranged in parallel.

By the way, the bus bar 73A is formed by bending after punching the conductive metal. After completion of the punching, as shown in FIG. Is formed, and burrs 92, 92 tend to be formed on both sides of the other surface. Other bus bars 73B to 73D, 74A to 74D, 7 are formed.
Similarly for 5,87 ..., 89 ...
And the burr 92 tends to be formed.

Thus, each bus bar 73A-73D, 74A
... 74D, 75, 87 ..., 89 ... One end of the bus bar side connection pads 76 ..., 77, 88 ..., 90 ...
Are arranged side by side in the housing main body 64 such that the side where the ... Is generated is buried in the housing main body 64.

On the other hand, on the electronic board 71, board-side connection pads 93, 93 ... Corresponding to the bus-bar-side connection pads 76, 77, 88, 90, respectively are provided.
Busbar-side connection pads 76, 77, 8 corresponding to each other
, ..., and the board-side connection pads 93, 93 ...
Connection is made by wire bonding with bonding wires 94, 94 ...

By the way, in such wire bonding, each bus bar side connection pad 76, ..., 88 ,, ..., 90 ... whose relative position with respect to the electronic substrate 71 is determined.
Of the bus bar side connection pads 76, 77, 88, 90 ... By moving the wire bonder by a distance corresponding to the reference position of the bus bar side connection pads 76, 77, 88, 90. , And bus bar side connection pads 76, 77, 88, 90, ..., It is necessary to perform automatic wire bonding by a wire bonder.

For this reason, the identification pads 95 for determining the reference positions of the bus bar side connection pads 76, ..., 77 arranged in parallel and the reference positions of the bus bar side connection pads 88 ... arranged in parallel are determined. And the identification pad 96 for each of the bus bar side connection pads 76 ..., 90 ..., 7
7; 88 ... and a different shape and are arranged on the surface of the housing main body 64 on the same plane as the bus bar side connection pads 76, 90, 77; 88.

On the other hand, the electronic board 71 has the electronic board 71.
And connection pads 76, 77, ..., 88 on each bus bar side
, 90 ... To identify the relative positions of the fixed positions, identification pads 97, 98 corresponding to the identification pads 95, 96 on the housing main body 64 side are formed similarly to the printed wiring on the electronic substrate 71.

Moreover, each bus bar side connection pad 76, ..., 9
The identification pads 95 serving as the reference positions of 0 ..., 77 are the individual bus bars 74A forming the bus bar side connection pads 76 arranged at one end along the arrangement direction of the bus bar side connection pads 76, ... Are formed integrally with each other.

Further, the identification pad 96 serving as a reference position of the bus bar side connection pads 88 ... Establishes the bus bar side connection pads 88 arranged at one end along the arrangement direction of the bus bar side connection pads 88. Are formed integrally with each other.

In FIG. 13, the pair of bus bars 89.
A motor connection terminal 99 is integrally formed at the other end of the electric motor 1.
Are connected to a pair of terminals 100 provided in 0 through a pair of strip-shaped motor connectors 101.

In the lower part of the base 15, a through hole 10 extending between the first and second mounting surfaces 15a and 15b of the base 15.
2 is provided so that the motor connectors 101 ... Removably penetrate the through hole 102.

A boss 104 having a bottomed positioning hole 103 coaxial with the through hole 102 is integrally formed in a portion of the housing main body 64 corresponding to the through hole 102. Motor connection terminal 99
... are fixed side by side.

In the brush holder 53 of the electric motor 10,
A connector holding portion 105 that penetrates the cover plate 54 and is inserted into the through hole 102 is integrally provided. The connector holding portion 105 includes a stepped cylindrical portion 105a inserted into an end of the through hole 102 on the second mounting surface 15b side, and the cylindrical portion 1a.
05a is connected to one end and the other end is a positioning hole 103.
And a holding plate portion 105b fitted to.

One end of the motor connectors 101 ... Held on both sides of the holding plate portion 105b penetrates the cylindrical portion 105a and is projected into the electric motor 10, so that the motor connectors 101 ... Mated and connected. Further, the other ends of both the motor connectors 101 ... Are connected to the motor connection terminal 9 in the boss 104 inserted into the through hole 102.
9 is fitted and connected.

The inner surface of the through hole 102 and the boss 104.
An annular minute gap 106 is formed therebetween, and the storage chamber 62 communicates with the intermediate portion in the through hole 102 via the minute gap 106. In addition, the cylindrical portion 1 of the connector holding portion 105
A small gap is also formed between 05a and both motor connectors 101 ... And the inside of the electric motor 10 also communicates with the intermediate portion inside the through hole 102.

A breathing structure 107 is provided in the lower part of the base 15 to allow the breathing of the storage chamber 62 and the electric motor 10 and to pass between the storage chamber 62 and the electric motor 10 and the outside. Reference numeral 107 includes the through hole 102, a vent hole 108 that allows the inner end to pass through the middle portion of the through hole 102 and opens the outer end downward, and a blocking member 109 that closes the vent hole 108. To be done.

The ventilation hole 108 has a small-diameter hole portion 108a whose inner end is opened at an intermediate portion of the through-hole 102, and the small-diameter hole portion 1
Medium diameter hole portion 108b having a diameter larger than that of 08a and having the inner end coaxially connected to the outer end of the small diameter hole portion 108, and the medium diameter hole portion 10.
The large diameter hole 108c is formed to have a diameter larger than 8b, the inner end is coaxially connected to the outer end of the medium diameter hole 108b, and the outer end is open to the lower surface of the base 15.

The annular step 108d between the small-diameter hole portion 108a and the medium-diameter hole portion 108b in the ventilation hole 108 is formed into a circular sheet-like closing member 109 made of, for example, a ventilation waterproof material typified by the product name GORE-TEX. Are abutted. On the other hand, a pressing member 111, which has a through hole 110 in the center and is formed into a disc shape with metal, is press-fitted into the medium diameter hole portion 108 b of the ventilation hole 108. This pressing member 111
Includes a circular protrusion 111a protruding toward the closing member 109 side.
Are integrally provided, and the closing member 109 includes the protrusion 111a of the pressing member 111 and the annular step portion 1 of the ventilation hole 108.
It will be sandwiched between 08d.

By the way, a small amount of brake fluid from the both-return pumps 9A, 9B with the plungers 48 facing the recess 49 toward the recess 49, or a minute amount generated by the electric motor 10 when the electric motor 10 is operated. A small amount of leaked parts such as the wear powder of No. 1 and the minute amount of wear powder generated by the plunger 48 itself may leak out, and the leaked brake fluid or wear powder may leak from the recess 49 to the second mounting surface 15b and the electric motor. If the air flows between the motors 10 and through the through holes 102 to the ventilation holes 108, the blocking member 109 that blocks the ventilation holes 108 may be clogged and the ventilation performance may be impaired. Therefore, an annular third seal member 118 that blocks the flow of the leaked brake fluid between the recess 49 and the second mounting surface 15b and the electric motor 10 and through the through hole 102 to the ventilation hole 108 is provided on the base 15 and the base 15. Electric motor 1
It is installed between 0.

Moreover, in the portion of the through hole 102 on the electric motor 10 side, an annular step portion 102a facing the electric motor 10 side is formed.
And the stepped cylindrical portion 1 of the connector holding portion 105.
And a large-diameter hole portion 102b for fitting 05a, and the third seal member 118 includes the step portion 102a.
And an annular stepped portion 105c formed on the outer surface of the cylindrical portion 105a, so that the cylindrical portion 10
It is interposed between the outer surface of 5a and the large diameter hole portion 102b of the through hole 102.

Next, the operation of this embodiment will be described. The base 15 has a pair of cylindrical portions 15c protruding from the first mounting surface 15a thereof so as to project toward the storage chamber 62.
Are integrally provided, and the first and second reservoirs 8A and 8B are provided.
Is a bottomed sliding hole 36 provided in the base 15 such that at least a part of the inner surface of the cylindrical portion 15c is formed.
And the storage chambers 37 connected to the outlet valves 6A to 6D are formed between the closed ends of the sliding holes 36.
Reserve piston 38 slidably fitted to 6 ...
, A spring receiving member 39 mounted on the tip of the tubular portion 15c, and a reserve spring 40 that is contracted between the reserve piston 38 and the spring receiving member 39.

Such first and second reservoirs 8A,
According to 8B, a part of the first and second reservoirs 8A and 8B is arranged in the storage chamber 62, and the storage chamber 62 in the portion corresponding to the first and second reservoirs 8A and 8B is provided.
The empty space inside can be made as small as possible, and the space required on the side of the base body 15 for arranging the first and second reservoirs 8A and 8B can be reduced by reducing the empty space inside the storage chamber 62. Since it can be made smaller, the brake fluid pressure control device 4 can be made smaller and lighter.

Further, the closed ends of the sliding holes 36 and the second mounting surface 15 of the base body 15 opposite to the first mounting surface 15a.
b between the first and second dampers 11A,
Since 11B is provided, the first and second reservoirs 8
By disposing a part of A and 8B in the storage chamber 62,
By arranging the first and second dampers 11A and 11B by effectively utilizing the space generated in 5, the base 15 can be made smaller and lighter, and further the brake fluid pressure control device 4 can be made smaller and lighter. You can

Moreover, the storage chamber 62 can be breathed by the breathing structure 107 passing between the storage chamber 62 and the outside. However, as the volume of the storage chamber 62 is reduced as described above, the breathing volume is reduced, so that the breathing structure is provided. The size of 107 can be reduced.

By the way, the first and second return pumps 9A,
9B is an output of the electric motor 10 arranged on the base 15 such that the plungers 48 are exposed to the recess 49 of the base 15 and fastened to the second mounting surface 15b of the base 15 that closes the recess 49. The shaft 55 is inserted into the recess 49, and the eccentric shaft portion 55a of the output shaft 55 reciprocally drives both the plungers 48 ..., However, a very small amount of brake fluid from the both return pumps 9A, 9B Motor 1
There is a possibility that a minute amount of leaked powder such as a minute amount of wear powder generated in the electric motor 10 or a small amount of wear powder generated in the plungers 48 ... Moreover, the pair of motor connection terminals 99 on the housing 16 side, which are attached to the first attachment surface 15a of the base 15, are ...
And a through hole 102 extending between the first and second mounting surfaces 15a and 15b so that the pair of motor connectors 101 for electrically connecting the electric motor 10 can be inserted.
A vent hole 108 is formed in the middle of the through hole 102 so that the inner end is passed and the outer end is opened downward.
And a ventilation hole 108 is closed by a closing member 109 made of a ventilation waterproof material.

Therefore, a very small amount of leaked material such as brake fluid and abrasion powder that has leaked into the recess 49 is discharged from the recess 49 between the second mounting surface 15b and the electric motor 10 and the through hole 102.
If it flows through the vent hole 108 through the above, the blocking member 109 may be clogged with leaked substances such as leaked brake fluid and leaked wear powder. However, the annular third seal member 118 that blocks the leakage of the leaked material from the recess 49 to the vent hole 108 between the second mounting surface 15b and the electric motor 10 and through the through hole 102 is the base body 15.
And the electric motor 10, and the ventilation hole 10
The spilled material does not clog the blocking member 109 that closes the valve 8, and the ventilation performance of the blocking member 109 can be normally maintained to maintain good breathing in the storage chamber 62.

The electric motor 10 has a motor case 17
Brush holder 53 made of resin to be fitted into the open end of
Connector holding portion 1 for holding both motor connectors 101 ... Has a cylindrical portion 105a inserted into at least an end portion of the through hole 102 on the second mounting surface 15b side.
05 is provided integrally with the brush holder 53, and a third seal member 118 is interposed between the outer surface of the cylindrical portion 105a and the inner surface of the through hole 102, and the third seal member 118 is arranged at such a position. By doing so, the size of the third seal member 118 can be reduced, and the third seal member 118 can be made smaller.
It is easy to assemble.

Further, a plurality of bus bars 73A to 73D, 74
An electronic board 71 is fixed to a resin housing main body 64 in which A to 74D, 75, 87, ..., 89 are embedded, and both ends thereof are buried in the housing main body 64 so that each of the bus bars 73A to 73D, 74A to 74D. , 75, 87 ...
89. A plurality of bus bar side connection pads 76 that are integrally connected to
, 77, 88, ..., 90 are arranged in parallel on the surface of the housing main body 64 outside the electronic board 71.
The board-side connection pads 93, which are arranged side by side, are connected to the bus-bar-side connection pads 76 ,.
77, 88, ..., 90, but identification pads for recognizing the reference position of each bus bar side connection pad 76 ,, 77, 88, ..., 90 whose relative position to the electronic substrate 71 is determined. 95, 96 are formed in a different shape from the bus bar side connection pads 76, ..., 77, 88, ..., 90, and the bus bar side connection pads 76 ,.
Housing main body 64 on the same plane as 77, 88, 90
Is disposed on the surface of.

Therefore, the identification pad 95,
It is easy to recognize 96 accurately, and by accurately recognizing the reference position of each bus bar side connection pad 76, 77, 88, 90, the board side connection pad 93 ... And the bus bar side connection pad 76. …, 77, 88…, 90…
Can be automatically and highly accurately connected by wire bonding with a wire bonder.

Moreover, the identification pads 95, 96 are provided with a plurality of bus bars 73A-73D, 74A-74D, 75, 87.
, 89 ... is formed integrally with one of 73A and 87, it is possible to avoid an increase in the number of parts without requiring a dedicated part for determining the reference position. it can. Further bus bars 73A, 8
7, that is, the identification pads 95 and 96 have a gloss superior to that of the surface of the housing main body 64 made of resin, so that the identification accuracy of the identification pads 95 and 96 can be improved.

Further, each bus bar 73A-73D, 74A-
74D, 75, 87 ..., 89 ... are formed by bending after punching, and each bus bar side connection pad 76 ..., 77, 88 ..., 90 ... , 77, 88 ..., 90 ... and integrated bus bars 73A to 73D, 74A to 74D, 75, 8
The side where the burr 92 is generated during punching of 7 ..., 89 ... Is embedded in the housing main body 64.
The housing main body 64 is provided side by side.

As a result, each bus bar 73A-73D,
The burr 92, which is generated during the punch-molding of 74A to 74D, 75, 87, 89, does not project from the surface of the housing main body 64, and the burr 92 allows the connection pads 76, 77, 77 on the bus bar side adjacent to each other. 88 ...
It is possible to eliminate the possibility that 90 contact with each other, and to narrow the space between the bus bar side connection pads 76, 77, 88, 90 ...
1 can be miniaturized.

Further, the burrs 92 bite into the housing main body 64 so that the bus bars 73A to 73D, 74A to 74D, 7 when molding the housing main body 64 are formed.
While preventing deformation of 5,87 ..., 89 ..., each bus bar 73A-73D, 74A-74D, 75, 87 ...,
The holding force of the housing 89 for the housing main body 64 is improved so that each bus bar side connection pad 76, 77, 88, 90.
It is possible to secure the fixation of the above to the housing main body 64.

Further, it is possible to prevent the bonding wires 94 from coming into contact with the burr 92 and being caught when the automatic wire bonding is performed by the wire bonder, and performing a smooth wire bonding by the wire bonder while preventing a short circuit. it can.

Although the embodiments of the present invention have been described above, 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 claims. It is possible.

[0088]

As described above, according to the first aspect of the present invention, the empty space in the storage chamber in the portion corresponding to the reservoir can be made as small as possible, and the base side is provided for disposing the reservoir. The required space can be reduced by reducing the empty space in the storage chamber, and the brake fluid pressure control device can be reduced in size and weight.

According to the second aspect of the present invention, by arranging a part of the reservoir in the storage chamber to effectively utilize the space generated in the base and disposing the damper, the size and weight of the base can be reduced. As a result, it is possible to further reduce the size and weight of the brake fluid pressure control device.

Furthermore, according to the third aspect of the present invention, the breathing of the storage chamber is made possible, and the breathing volume is reduced as the volume of the storage chamber is reduced, so that the breathing structure can be downsized.

[Brief description of drawings]

FIG. 1 is a brake hydraulic circuit diagram of a brake device for a four-wheeled vehicle.

FIG. 2 is a front view of a brake fluid pressure control device.

FIG. 3 is a plan view taken along arrow 3 of FIG.

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

5 is a sectional view taken along line 5-5 of FIG.

6 is a sectional view taken along line 6-6 of FIG.

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

FIG. 8 is an enlarged view of a main part of FIG.

9 is a view of the housing main body as viewed in the direction of arrows 9-9 in FIG.

FIG. 10 is a plan view of the bus bar assembly.

11 is an enlarged cross-sectional view taken along line 11-11 of FIG.

FIG. 12 is a cross-sectional view of a bus bar side connection pad.

13 is an enlarged view of a portion indicated by an arrow 13 in FIG.

[Explanation of symbols]

2A, 2B, 2C, 2D ... Wheel brakes 4 ... Brake fluid pressure control device 5A, 5B, 5C, 5D ... Inlet valve 6A, 6B, 6C, 6D ... Outlet valve 8A, 8B ... Reservoir 9A, 9B ... Return pump 10 ... Electric motor 11A, 11B ... Damper 15 ... Base 15a ... first mounting surface 15b ... second mounting surface 15c ... Cylindrical part 16 ... Housing 19, 29 ... Electromagnetic drive 36 ... Sliding hole 37 ... Reservoir 38 ... Reserve piston 39 ... Spring receiving member 40 ... Reserve spring 61 ... Electronic control unit 62 ... storage room 107 ... Respiratory structure M: Master cylinder

Claims (3)

[Claims] 1. A reservoir (8A, 8B) and a brake pumped from the reservoir (8A, 8B) on a substrate (15) having first and second mounting surfaces (15a, 15b) facing each other. A return pump (9A, 9B) for returning the liquid to the master cylinder (M) side, and the return pump (9A, 9B)
Damper (11A, 11B) connected to the discharge side of B)
And the master cylinder (M) and wheel brakes (2A,
2B, 2C, 2D), an electromagnetically driven inlet valve (5A, 5B, 5C, 5D) that switches between communication and cutoff, and communication and cutoff between the wheel brakes (2A to 2D) and the reservoir (8A, 8B). Electromagnetically driven outlet valve (6A, 6
B, 6C, 6D) are arranged such that the electromagnetic drive parts (19, 29) of the valves (5A to 5D, 6A to 6D) project from the first mounting surface (15a). The electromagnetic drive unit (1) is provided between the housing (16) mounted on the mounting surface (15a) and the first mounting surface (15a).
(9, 29) and an electronic control unit (61) for energizing and controlling the electromagnetic drive section (19, 29).
2) is formed, and the electric motor (10) for driving the return pumps (9A, 9B) has the second mounting surface (15b).
In the vehicle brake fluid pressure control device that is fastened to the base body (15), a cylindrical portion (1) is provided on the base body (15) so as to project from the first mounting surface (15a) toward the storage chamber (62).
5c) is integrally provided, and the reservoirs (8A, 8B) are provided.
Is connected to the bottomed sliding hole (36) provided in the base body (15) so that at least a part of the inner surface of the tubular portion (15c) is formed, and the outlet valves (6A to 6D). A reserve piston (38) slidably fitted in the sliding hole (36) so as to form a storage chamber (37) between the closed end of the sliding hole (36) and the cylinder. Section (15c)
A vehicle brake characterized by comprising a spring receiving member (39) attached to the tip of the vehicle and a reserve spring (40) provided between the reserve piston (38) and the spring receiving member (39). Hydraulic control device. 2. The damper (11A, 11B) is disposed on the base body (15) between the closed end of the sliding hole (36) and the second mounting surface (15b). The vehicle brake fluid pressure control device according to claim 1. 3. A breathing structure (10) for allowing breathing of the storage chamber (62) and passing between the storage chamber (62) and the outside.
7. The vehicle brake fluid pressure control device according to claim 1, wherein 7) is provided on the base body.