JPH11124023A - Abs actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute a filter of a booster control valve so as to allow the debooster control valve to be eliminated. SOLUTION: This actuator has a member 18c that, of the gaps that are formed between a filter 18 and the surface of the inner wall of a housing 6, partitions gaps 19a, 19b between a pipeline A and a pipeline B, where the gap 19a and the gap 19b circle around to the right and left, respectively, of a sectional circular booster control valve 1. Brake fluid runs along the gap formed between the booster control valve 1 and the surface of the inner wall of the housing 6. However, when the area between the filter 18 and the surface of the inner wall of the housing 6 is connected, foreign matter enters through this space into the pipeline B. Therefore, by partitioning the gaps 19a, 19b into the pipeline A and the pipeline B with member 18c and making the brake fluid that flows from pipeline A into pipeline B to flow through the filter 18, it is possible to prevent foreign matter from entering the pipeline B with only the filter 18 having the booster control valve 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ABS actuator for performing ABS control for avoiding a tendency to lock wheels by increasing or decreasing the hydraulic pressure of a brake in a vehicle.

[0002]

2. Description of the Related Art FIG. 4 is a sectional view of a conventional ABS actuator. FIG. 5 is a sectional view taken along the line ZZ of FIG. As shown in FIGS. 4 and 5, the ABS actuator 200 includes a pressure increasing control valve 101 and a pressure reducing control valve 10.
2. The ABS control reservoir 103 and the like
It is housed inside and integrated. The vehicle brake device executes the ABS control using the ABS actuator 200.

[0003] In the housing 106 constituting the ABS actuator 200, there are formed a pipe S connecting the master cylinder and the wheel cylinder, and a pipe T connecting the pipe S and the reservoir. A pressure increase control valve 101, a pressure reduction control valve 102, and the like are arranged in these pipelines S and T. More specifically, the pressure increase control valve 101
Is a through hole 11 that communicates one surface of the cylindrical end surface with the outer periphery.
The solenoid valve is formed of a plunger-type solenoid valve in which the pipe S and the pipe S are connected so that the inlet 110a on the end face side of the through hole 110 is on the master cylinder side and the inlet 110b on the outer peripheral side is on the wheel cylinder side. It is arranged at the connection point of the road T. At this time, as shown in FIG. 5, a predetermined gap 1 is provided between the outer periphery of the pressure increasing control valve 101 and the housing 106.
50 is formed, and the brake fluid in the wheel cylinder can escape to the reservoir through the gap. The pressure increase control valve 101 arranged in this way is in a communicating state at the time of normal braking or pressure increase of the ABS control, and transmits the master cylinder pressure (hereinafter, referred to as M / C pressure) to the wheel cylinder, and reduces the pressure of the ABS control. At the time of holding or holding, the M / C pressure is prevented from being transmitted to the wheel cylinder.

The pressure-reducing control valve 102 is constituted by a plunger type solenoid valve having a through hole 120 through which one surface of a cylindrical end face communicates with the outer periphery. An inlet 120a on the end face side of the through hole 120 is connected to a reservoir. Side, the outer entrance 1
20b is arranged on the wheel cylinder side. The pressure reducing control valve 102 is in a communicating state when the pressure in the ABS control is reduced, so that the brake fluid generating the wheel cylinder pressure (hereinafter referred to as W / C pressure) is released to the reservoir, and the pressure of the W / C needs to be reduced. No normal braking or AB
When the pressure is increased or maintained in the S control, the state is cut off.

[0005] The valve operation of the pressure increasing control valve 101 and the pressure reducing control valve 102 as described above causes normal braking and A
At the time of the BS control, a favorable braking operation is performed. However, if foreign matter enters the ABS actuator 200 when foreign matter has been mixed in the brake fluid, the control valve may cause foreign matter to be caught and a good braking operation may not be performed. there is a possibility.

Therefore, the pressure-increasing control valve 10 having a cylindrical shape
In addition to covering the inlet 110a on the end surface side and the inlet 110b on the outer peripheral side with filters 131 and 132, respectively, and covering the inlet 120a on the outer peripheral side of the cylindrical pressure reducing control valve 120 with the filter 133, each control valve 101, 102
Foreign matter is prevented from entering the inside of the ABS actuator 200.

[0007]

However, the through-holes 11 of the pressure-increasing control valve 101 and the pressure-reducing control valve 102 are different from each other.
Since it is necessary to cover 0 and 120 with the filters 131 to 133, there is a problem that the manufacturing cost of the ABS actuator 200 increases. The present invention has been made in view of the above problems, and has as its object to reduce the manufacturing cost of an ABS actuator by configuring a filter of a pressure increasing control valve with a structure that can eliminate the filter of the pressure reducing control valve.

[0008]

In order to achieve the above object, the present invention employs the following technical means. According to the first aspect of the present invention, there are provided partition wall surfaces (18c) disposed in the clockwise gap (19a) and the counterclockwise gap (19b), respectively, in the radial direction of the filter (18). The wall (18c) for partition protruding to the filter (18)
By contacting these partition wall surfaces (18c) with the inner wall surface of the housing (6), a clockwise gap (19a) and a counterclockwise gap (19b) are formed in the first conduit (A). And a second conduit (B) side.

As described above, the clockwise gap (19a) and the counterclockwise gap (19) are formed by the partition wall surface (18c).
b) is divided into the first pipe (A) side and the second pipe (B) side, so that the brake fluid in the first pipe (A) passes through the second pipe (A) through the filter (18). Since the fluid flows toward the path (B), foreign matter in the brake fluid can be filtered by the filter (18). As a result, foreign matter mixed in the brake fluid on the first pipe (A) side is removed by the clockwise gap (19a).
In addition, since it does not flow directly to the second conduit (19b) through the counterclockwise gap (19b), it is possible to prevent foreign matter from entering the ABS actuator. For this reason, the inlet (23) on the outer peripheral side of the pressure reducing control valve (2)
The filter of b) can be eliminated.

According to the second aspect of the present invention, the filter (18) is provided with an annular member (18a) disposed on each of the substantially cylindrical end surfaces, and extends in the axial direction of the filter (18). And a plurality of rod-shaped members (18b) connecting the members (18a).
8b) constitutes a partition wall surface (18c).

For example, when the filter (18) is formed by a thin member such as a net, it is necessary to reinforce the filter (18). For this reason, an annular member (18a) is arranged on each of the substantially cylindrical end faces, and the annular member (1
8a) may be connected and supported by a rod-shaped member (18b). In this case, by forming the partition wall surface (18c) with the rod-shaped member (18b), it can be used also as a reinforcing member.

According to the third aspect of the present invention, the bar-like members (18b) are composed of six pieces arranged at equal intervals, and three of the six pieces are arranged at intervals of three to form a partition. (18c). The filter (18) is arranged between the first control valve (1) and the housing (6), and the partition wall (18c) has a clockwise gap (19) as defined in claim 1.
a) and the counterclockwise gap (19b). If there are only two partition wall surfaces (18c), it is necessary to perform positioning. However, the partition wall surface (18c) is formed by the three rod-like members (18b) arranged at equal intervals as described above. With this configuration, the rod-like members (18c) can be arranged in the clockwise gap (19a) and the counterclockwise gap (19b), so that the necessity of the positioning can be eliminated. .

[0013]

FIG. 1 shows an ABS actuator 10 according to the present invention.
0 shows a sectional view. FIG. 2 is a sectional view taken along line XX of FIG. The ABS actuator 100 is mounted so that the vertical direction in the drawing is the vertical direction of the vehicle. Hereinafter, the ABS actuator 100 will be described with reference to FIG.

The ABS actuator 100 has a pressure-increasing control valve 1, a pressure-reducing control valve 2, an ABS control reservoir 3, and check valves 4, 5 and the like housed in a housing 6 and is integrated therewith. The brake device executes ABS control using the ABS actuator 100. In the housing 6, a pipe A communicating the master cylinder and the wheel cylinder, and the pipe A and the ABS control reservoir 3 are connected.
B, which returns the brake fluid in the ABS control reservoir 3 toward the master cylinder, and returns the brake fluid from the wheel cylinder to the master cylinder when the brake pedal is stopped. Pipe lines D for quick operation are formed.

The pressure increase control valve 1 is provided at a connection point between a pipe A and a pipe B which communicates the master cylinder and the wheel cylinder, and controls communication and cutoff of the pipe A. The pressure-increasing control valve 1 is constituted by a plunger-type solenoid valve, is housed in a housing space formed in the housing 6 in advance, and is fixed in the housing 6 by caulking a part of the housing 6. I have.

The pressure increasing control valve 1 has a ball valve 11a at its tip.
Plunger 11 having a valve seat 12 of ball valve 11a,
A cylinder 14 that accommodates the plunger 11 and the valve seat 12 and forms a passage 13 for brake fluid, and an O-ring 15 that prevents brake fluid from leaking between the cylinder 14 and the housing 6 are provided. The cylinder 14 has a cylindrical shape.
Reference numeral 3 designates holes provided on one end surface of the cylindrical shape and the outer periphery of the cylinder 14 as inlets 13a and 13b. Further, the plunger 1 is placed in the cylindrical cylinder 14.
1 are slidably arranged. When the plunger 11 slides in the cylinder 14, the ball valve 1
1 a is seated on the valve seat 12 or separated from the valve seat 12 so that the communication hole 13 is communicated / blocked.

The cylinder 14 is arranged in the housing 6 so that the inlet 13a on the end face side of the conduction hole 13 faces the master cylinder side and the inlet 13b on the outer peripheral side faces the wheel cylinder side. Conducting hole 13 of cylinder 14
The inlet 13a on the end face side and the inlet 13b on the outer peripheral side are covered with filters 16 and 18, respectively, so that foreign substances mixed in the brake fluid do not enter the ABS actuator 100.

The filter 16 has an inlet 13 on one side of the end face.
It has the same circular shape as a, and is caulked and fixed to the tip of the cylinder 14 together with a cup member 17 for forming an orifice. On the other hand, the filter 18 is formed in a cylindrical shape, and is configured to entirely cover the outer periphery of the cylinder 14. A front view of the filter 18 is shown in FIG.
FIG. 3A is a sectional view taken along line BB of FIG.
(B).

The filter 18 is formed of a cylindrical net. Since a thin mesh is used for the filter 18, the filter 18 has an annular member 18 a having a cylindrical end surface, and a cylindrical rod-shaped member (which extends in the axial direction to connect the annular member 18 a). A partition wall surface 18b is provided, and the annular member 18a and the rod-shaped member 18b serve as a reinforcing member so that the cylindrical shape of the filter 18 is maintained.

There are six rod-like members 18b, each of which is arranged at equal intervals and supports the annular member 18a in six directions. The six bar-shaped members 18b arranged at equal intervals are:
As shown in the cross-sectional view of FIG. 3B, the member 18c includes a thick member 18c and a thin member 18d having a radial thickness (hereinafter, simply referred to as a thickness). They are arranged alternately.

Specifically, the thick member 18c is formed with a thickness equal to the thickness of the annular member 18a, and the thin member 18d is formed with a smaller thickness. The thickness of the annular member 18a is such that the annular member 18a comes into contact with the housing 6 when the filter 18 is arranged in the storage space in the housing 6 together with the pressure increase control valve 1. Therefore, the thickness of the member 18c is reduced. Annular member 18
The member 18c has a thickness similar to that of the housing 6a.
I try to contact with. This prevents foreign matter in the brake fluid from passing between the member 18c and the housing 6. The reason will be described later.

The pressure-increasing control valve 1 configured as described above is in a communication state during normal braking (during non-ABS control) and pressure-increasing control in a state where foreign substances in the brake fluid are removed by the filters 16 and 18. The brake fluid pressure generated in the master cylinder is transmitted to the wheel cylinder,
At the time of the pressure reduction control or the holding control of the BS control, the brake state is cut off so that the brake fluid pressure generated in the master cylinder is not transmitted to the wheel cylinder.

When the brake is stopped, the brake fluid is returned from the wheel cylinder to the master cylinder. However, the return of the brake fluid is restricted by the orifice of the cup member 17 provided in the pressure increasing control valve 1. You. Therefore, a pipe D is formed, and the return of the brake fluid can be quickly performed through the pipe D. Since the pipe D communicates with the master cylinder, a check valve 4 is provided in the pipe D so that the brake fluid does not flow backward due to the brake fluid pressure generated in the master cylinder.

The pressure-reducing control valve 2 is provided in a pipe B communicating the pipe A with the reservoir 3 for controlling the ABS, and controls the communication and cutoff of the pipe B. The pressure-reducing control valve 2 is formed of a plunger-type solenoid valve, is housed in a housing space formed in the housing 6 in advance, and is fixed in the housing 6 by caulking a part of the housing 6. . As shown in FIG.
Since the pressure increase control valve 1 is disposed at the connection point between the pipes A and B, the brake fluid is supplied to the housing 6 and the pressure increase control valve 1.
And flows into the pressure reducing control valve 2 via the pipe B.

The pressure reducing control valve 2 has a ball valve 21a at its tip.
Plunger 21 provided with a valve seat 22 of ball valve 21a,
A cylinder 24 which accommodates the plunger 21 and forms a valve seat 22 and forms a passage 23 for brake fluid, and an O-ring 25 for preventing brake fluid from leaking between the cylinder 24 and the housing 6 are provided. . Cylinder 2
Reference numeral 4 denotes a cylindrical shape, and the conduction hole 23 provided in the cylinder 24 is configured by using one surface of the cylindrical end surface and holes provided on the outer periphery of the cylinder 24 as inlets 23a and 23b. A plunger 21 is slidably disposed in a cylindrical cylinder 24. When the plunger 21 slides in the cylinder 24, the ball valve 21a is seated on the valve seat 22 or is separated from the valve seat 22 so that the communication hole 23 is communicated or blocked.

The cylinder 24 is disposed in the housing 6 such that the outer entrance 23b of the conduction hole 23 faces the wheel cylinder and the end 23b of the end face faces the ABS control reservoir 3. This pressure reducing control valve 2
Is connected during pressure reduction control of the ABS control, and
The brake fluid inside is released to the ABS control reservoir 3, and the brake fluid pressure applied to the wheel cylinder is reduced.

Although the pressure increase control valve 1 is provided with the filters 16 and 18 as described above, the pressure reduction control valve 2 is not provided with such a filter. This is because the brake fluid flows through the gap between the pressure increasing control valve 1 and the housing 6 and flows into the pressure reducing control valve 2 side.
c, the filter 1 is provided.
8, foreign substances in the brake fluid can be removed,
This is because foreign matters can be prevented from entering the ABS actuator 100 without providing a filter in the pressure reduction control valve 2.

More specifically, foreign matter in the brake fluid enters the ABS actuator 100 only when the gaps 19a and 19a between the filter 18 and the housing 6 are increased.
This is because the foreign matter passes through 9b and moves to the pressure reducing control valve 2 side. For this reason, by moving the gaps 19a and 19b between the filter 18 and the housing 6 by the member 18c, the movement of the brake fluid is performed after the filter 18 is passed.

Further, as shown in the present embodiment, the three thick members 18c are provided at three places so that the gaps 19a and 19b between the filter 18 and the housing 6 can be easily partitioned. It is. That is, as shown in FIG. 2, the flow path of the brake fluid on the outer periphery of the pressure increasing control valve 1 is a clockwise direction (19a) and a clockwise direction (19b) with respect to the pressure increasing control valve 1. Because
By separating these two distribution channels, an effect of removing foreign matter in the brake fluid can be obtained. However, when two thick members 18c are used, it is necessary to perform positioning (angle adjustment with respect to the center of the pressure increase control valve) so that the members 18c are always arranged in the two flow paths. For this reason, by providing the members 18c at three locations at equal intervals, the members 18c are always located at positions where the two flow paths can be separated, eliminating the need for positioning the filter 18.

Although the filter 18 receives a force due to the flow of the brake fluid, the filter 18 does not rotate due to the small clearance between the member 18c and the housing 6. Therefore, foreign matter does not enter the ABS actuator 100 due to the rotation of the filter 18. In addition, although a filter is not provided at the inlet 23a on the end face side of the through hole 23 formed in the pressure reducing control valve 2, the direction of the flow of the brake fluid is taken into consideration. This is because the brake fluid does not flow.

An ABS control reservoir 3 is made up of a reservoir piston 33 by a spring 32 fixed by a cover 31.
Is pressed upward in the drawing, and the reservoir piston 3 is controlled by the brake fluid pressure during the pressure reduction control.
3 slides, and the brake fluid is stored in a space formed by the sliding. When the pressure in the master cylinder becomes low, the ABS control reservoir 3
Is returned to the master cylinder through the pipe C in the housing 6. Since the pipe C communicates with the master cylinder, a check valve 5 is provided in the pipe C so that the brake fluid does not flow backward due to the brake fluid pressure generated in the master cylinder.

Each of the check valves 4 and 5 performs a valve operation in accordance with a predetermined differential pressure by using a ball on the left side of the drawing as a valve body and a tapered portion formed in a pipe as a valve seat. . For example, in the case of the check valve 4, when the pressure on the wheel cylinder side is higher than the pressure on the master cylinder side, the ball 21 separates from the valve seat 6a to establish a communication state with the pipe line D. The pipe D is seated on the valve seat 6a to be in the cutoff state. Thus, when the master cylinder side is higher in pressure than the wheel cylinder side, the brake fluid flows to the wheel cylinder side only through the pressure increase control valve 1, and when the pressure is low, the brake fluid on the wheel cylinder side is supplied to the pipe. The flow can be quickly returned to the master cylinder side through the path D.

In the ABS actuator 100 configured as described above, the filter 18 having the above configuration is provided at the inlet 13b on the outer peripheral side of the through hole 13 provided in the pressure increasing control valve 1. The inlet 23 a on the outer peripheral side of the conduction hole 23 provided in the pressure reducing control valve 2 is connected to the filter 18.
Even if they are not covered with the brake fluid, foreign matter in the brake fluid can be prevented from entering the ABS actuator 100.

[Brief description of the drawings]

FIG. 1 is a schematic view of an ABS actuator 100 according to an embodiment to which the present invention is applied.

FIG. 2 is a sectional view taken along the line XX of FIG.

FIG. 3A is a front view of a filter 18, and FIG.
FIG. 3 is a sectional view taken along the line YY of FIG.

FIG. 4 is a schematic diagram of a conventional ABS actuator 100.

FIG. 5 is a sectional view taken along the line ZZ in FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pressure increase control valve, 2 ... Pressure decrease control valve, 3 ... ABS control reservoir, 11 ... Plunger, 11a ... Ball valve, 12 ...
Valve seat, 13 ... conduction hole, 13a, 13b ... inlet, 14 ... cylinder, 16 ... filter, 18 ... filter, 18a ... annular member, 18b rod-shaped member, 18c, 18d ... member, 19
a: clockwise gap, 19b: counterclockwise gap, AD: pipeline.

Claims (3)

[Claims] 1. A first pipe (A) which contains a reservoir (3) for storing a brake fluid and communicates a master cylinder and a wheel cylinder, and said first pipe (A).
And a second conduit (B) communicating with the reservoir (3). The housing (6) has a substantially cylindrical shape. A communication hole (13) having one surface and a part of the outer peripheral surface as inlets (13a, 13b) is provided. In the housing (6), an inlet (13a) on one side of the end surface is directed toward the master cylinder, The inlet (13b) on the outer peripheral surface side is arranged at a connection point between the first pipeline (A) and the second pipeline (B) so as to face the wheel cylinder side,
A first control valve (1) for controlling a communication cutoff of the first pipeline (A); and a first control valve (1) arranged in the second pipeline (B) and communicating with the second pipeline (B). A second control valve (2) for controlling shutoff, wherein the first control valve (1) formed between the first control valve (1) and an inner wall surface of the housing (6). Clockwise gap (19a) and counterclockwise gap (19b)
Through which the brake fluid in the first pipe (A) flows into the second pipe (B), and the brake fluid is generated in the wheel cylinder by releasing the brake fluid into the reservoir (3). An ABS actuator for decompressing the pressure, wherein a substantially cylindrical filter (18) surrounding the outer periphery of the first control valve (1) so as to cover the inlet (13b) on the outer peripheral surface side
The filter (18) is provided with the clockwise gap (19).
a) and a wall surface (18c) for the filter (18), which is disposed in the counterclockwise gap (19b) and protrudes in the radial direction of the filter (18), and the wall surface (18c) for the partition is When the filter (18) is arranged in the housing (6), the filter (18) comes into contact with the inner wall surface of the housing (6), and the clockwise gap (19a) and the counterclockwise gap (19b) are An ABS actuator, wherein the ABS actuator is configured to partition between a first pipeline (A) side and the second pipeline (B) side. 2. An annular member (1) disposed on each of substantially cylindrical end surfaces.
8a), and a plurality of rod-shaped members (18b) extending in the axial direction of the filter (18) and connecting the annular member (18a). The rod-shaped members (18b) The ABS actuator according to claim 1, wherein said partition wall (18c) is formed. 3. The bar-like member (18b) is composed of six equally-spaced members, and three of the six members are arranged every other one of the six members so that the partition wall surface (18b) is formed.
3. The ABS actuator according to claim 2, comprising c).