JP2002053021A - Abs actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ABS actuator having a seal structure capable of preventing the intrusion of a foreign matter into each port, and acting as a humidity-proof function of each port. SOLUTION: First tape seals 30 of the circular shape are adhered to a housing 1 to cover an upper face of each damper 7, and a second tape seal 31 having cuts of the shape corresponding to the first tape seals 30 is adhered to the housing 1 to cover each port 8. The adhesive force of the second tape seal 31 to the housing 1 is weaker than that of the first tape seal 30 to the housing 1. Further a third tape seal 32 is adhered to surfaces of the first and second tape seals 30 and 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ABS actuator used for controlling brake fluid pressure of a vehicle.

[0002]

2. Description of the Related Art FIG. 3 shows a top view of a conventional ABS actuator. As shown in FIG. 3, a plurality of ports 8 connected to each wheel cylinder are formed on the upper surface of the housing of the ABS actuator.
A damper 7 for damping the pulsation of the brake fluid discharged by the pump is provided.

[0003] Before mounting the ABS actuator, the ABS actuator is transported with its upper surface shown in Fig. 3 facing upward. In such a state, each port 8
In order to prevent such a situation, foreign substances may enter the respective dampers 7, the ports 8 are closed with rubber stoppers 50 and a tape seal 51 is stuck on the upper surface of each damper 7 to prevent this. Although the rubber stopper 50 for closing each port 8 is removed when the vehicle is mounted, the tape seal 51 affixed to the upper surface of the damper 7 remains affixed to the ABS actuator even after the vehicle is mounted. It is configured with a combination.

[0004]

However, the rubber stopper 50 for closing each port 8 has a function of preventing entry of foreign matter into each port 8, but does not fulfill the function of preventing moisture in each port 8. Not suitable for long-term transport.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide an ABS actuator having a seal structure that can prevent foreign substances from entering into each port and can also function as a moisture-proof function for each port.

[0006]

Means for Solving the Problems In order to achieve the above-mentioned object, the present inventors conducted the following trial manufacture.

First, as shown in FIG. 4, a tape seal 51 is attached to the upper surface of the damper 7, and then each port 8 is placed from above.
A prototype of a seal structure in which a transparent tape seal 52 covering the entire surface is attached to the upper surface of the housing 1 was manufactured.

In such a seal structure, ABS
When mounting the actuator on a vehicle, the tape seal 52
Is peeled off, and connection between each port 8 and the wheel cylinder is achieved. At this time, since the tape seal 51 on the upper surface of the damper 7 is pasted before the tape seal 52 covering all the ports 8, the tape seal 51 is left on the ABS actuator even after the vehicle is mounted.

However, in such a sealing structure, since the tape seal 52 covering all the ports 8 is applied from above the tape seal 51 on the upper surface of the damper 7,
The tape seal 52 has a step formed by the tape seal 52.
From the investigation, it was found that a gap (indicated by a hatched portion in the drawing) was formed between the housing and the housing 1, and moisture was introduced into the port through this gap, and the moisture-proof function could not be secured.

Therefore, as shown in FIG. 5, the tape seal 60 is formed so as to include each damper 7 and has a hole 60a formed at a position corresponding to each port 8 and indicated by a hatched portion in the figure. A seal structure in which a hole 60a corresponding to the port 8 and a tape seal 61 covering the tape seal 60 are arranged in the second layer, and a seal structure in which the hole 60a corresponding to the port 8 is disposed in the second layer, was produced as a trial.

Thus, the function of preventing entry of foreign matter into each port 8 and each damper 7 can be achieved.
In addition, each damper 7 can also serve as a moisture-proof function.

However, in such a structure, when the second-layer tape seal 61 is to be peeled off when mounted on a vehicle, the end portion of the first-layer tape seal 60 located around the port 8 is accordingly removed. Examination revealed that 60b was peeled off. It is considered that this is because the first-layer tape seal around the port 8 has a small sticking sticker to be attached to the housing 1.

Therefore, based on the above-mentioned examination of the prototype, the invention according to the first aspect has a housing (1) in which a hydraulic circuit through which brake fluid flows is formed, and a port connected to a wheel cylinder or a master cylinder. (8,
9) and a recess (1) forming a passage through which the brake fluid flows.
(6) and (7) cover the upper surface of the member including the concave portion in the ABS actuator disposed on the same surface of the housing.
The first tape seal (3
0) and a second tape seal (31) affixed to the housing so as to cover the port, wherein the first tape seal and the second tape seal are arranged so as not to overlap with each other, It is characterized in that the adhesive strength when the second tape seal is attached to the housing is lower than the adhesive strength when the first tape seal is attached to the housing.

As described above, by preventing the first tape seal and the second tape seal from overlapping each other, the role of preventing foreign matter from entering each member including the recess and each port. In addition to fulfilling the function, each member including the concave portion and each port can also serve as a moisture-proof function.

According to the second aspect of the present invention, the third tape seal (32) is provided on the surface of the second tape seal.
Is attached, and when the third tape seal is peeled off from the housing, the second tape seal is also peeled off from the housing.

As described above, by attaching the third tape seal to the upper surface of the second tape seal, when the width of the sticker around each port is narrow, the second tape seal is attached to the second tape seal by the thermal expansion of the air in each port. Can be prevented from being peeled off from the housing and the moisture-proof function cannot be performed at the peeled portion.

In this case, when the third tape seal is also attached to the surface of the first tape seal, the third tape seal adheres to the first tape seal. If the force is less than the adhesive strength of the first tape seal to the housing, the first tape seal along with the third tape seal will not peel from the housing.

According to a fourth aspect of the present invention, both the second tape seal and the third tape seal have portions protruding from the housing.
With such a configuration, the second and third tape seals can be easily peeled off from the housing by using the portions protruding from the housing.

According to the fifth aspect of the present invention, a cutout corresponding to the first tape seal is formed in the second tape seal, and the first tape seal is disposed in the cutout portion. It is characterized by being constituted so that it may be.

As described above, by forming the notch corresponding to the first tape seal in the second tape seal, the first tape seal and the second tape seal can be prevented from overlapping. For example, when the first tape seal has a circular shape, a notch corresponding to the circular shape is formed in the second tape seal.

In the invention described in claim 7, the second tape seal has a film and an adhesive material applied to one surface of the film, and the adhesive material is applied to one surface of the film. It is characterized in that the adhesive material is applied again to the one surface side.

As described above, by applying the adhesive material on one side of the film and then applying the adhesive material again, the adhesive strength of the adhesive material can be reduced. For example, as described in claim 8, the adhesive material may be applied again on one side of the film in a mesh shape.

The reference numerals in parentheses of the above means indicate the correspondence with specific means described in the embodiments described later.

[0024]

(First Embodiment) The present invention will be described below with reference to the embodiment shown in the drawings. Here, a case will be described in which the present invention is applied to an ABS actuator of a type provided with a total of eight control valves (so-called 8-solenoid type).

FIG. 1 is a diagram illustrating an embodiment of the present invention.
A part of the BS actuator 100 shows a step front view. FIG. 2 is a top view of the ABS actuator shown in FIG. 1 when viewed from above the plane of FIG. Hereinafter, the configuration of the ABS actuator 100 will be described with reference to FIGS.

The ABS actuator 100 is arranged between a master cylinder (not shown) and a wheel cylinder. As shown in FIGS. 1 and 2, the ABS actuator 100 includes an aluminum housing 1 made of a substantially hexahedron in which various pipes (brake fluid passages) are formed. Elements are assembled and assembled.

On one surface (second predetermined surface) side of the housing 1, various control valves 2, 3 for controlling the flow of the brake fluid in the brake pipe are arranged. In the present embodiment, four control valves 2 (3) are arranged in the W direction perpendicular to the H direction and the L direction as shown in FIG. 2, and two control valves 2 (3) are arranged in the H direction as shown in FIG. The housing 1 is provided with a total of eight control valves 2 and 3, and a surface (third predetermined surface) of the housing 1 opposite to the surface on which the various control valves 2 and 3 are arranged is provided with a motor. 4 are arranged.
The pump 4 is driven by the motor 4.

The surface of the housing 1 is different from the surface on which the various control valves 2 and 3 are disposed and the surface on which the motor 4 is disposed. The reservoir 6 is disposed on one surface substantially perpendicular to the surface on which the motor 4 is disposed. The damper 7 is arranged on a surface (first predetermined surface) facing the surface on which the reservoir 6 is arranged.

Further, as shown in FIG.
Among them, on one surface side on which the damper 7 is arranged, a total of four ports 8 connected to the wheel cylinder are formed. These ports 8 are formed so as to communicate with the respective pressure increase control valves 2. A total of two ports 9 connected to the master cylinder are formed on one surface on which the motor 4 is disposed. One of these ports 9 is connected to two pressure increasing control valves 2 on the right side of the drawing, and the other is connected to two pressure increasing control valves 2 on the left side of the drawing. One surface on which the dampers 7 and the ports 8 are arranged is a surface facing upward when the ABS actuator is transported and the vehicle is mounted.

The specific connection relationship of each component is as follows.

The port 9 connected to the master cylinder and the port 8 connected to the wheel cylinder are connected by a pipe A. This line A is provided with a pressure increase control valve 2, and the communication between the line A and the cutoff state can be controlled by the pressure increase control valve 2. And, between the pressure increase control valve 2 and the wheel cylinder, a reservoir 6
Is connected. This line B is provided with a pressure reduction control valve 3 for controlling the flow of the brake fluid to the reservoir 6.

Further, the master cylinder and the pressure increase control valve 2 are used to return the brake fluid released to the reservoir 6 to the pipe A.
The pipeline A and the reservoir 6 are connected by the pipeline C. The pipe C is provided with a pump 5 for sucking and discharging the brake fluid in the reservoir 6 and a damper 7 for attenuating pulsation of the brake fluid discharged from the pump 5.

More specifically, the damper 7 has a substantially cylindrical concave portion 10 having an axis in the H direction formed by partially shaving or denting the surface of the wheel cylinder on which the port 8 is formed. It is formed by fitting a cup member (partition member) 21 having an axis in the H direction, and then fitting a lid-shaped partition wall 12 into the entrance of the concave portion 10. The space in the recess 10 is divided into two compartments 1 by the cup member 21.
3a and 13b, one of the rooms (first room) 13a is a damper room. Then, the room 13 a constituting the dump chamber is connected to the pipeline C, and the other room (second room) 13 b is connected to the pipeline A.

The cup member 21 is formed in a cup shape whose one side is open and whose bottom surface 21a has a substantially circular shape.
The cup member 21 is fitted into the recess 10 from the opening side, but since the mouth 21b (the tip of the opening) of the cup member 21 is smaller in diameter than the other portions and is squeezed, the cup member 21 is easily inserted into the recess 10. It can be fitted.

The cup member 21 has a press-fit portion 21c formed on a side wall of the cup member 21. When the cup member 21 is fitted into the recess 10, the press-fit portion is pressed into the recess 10, and the cup member 10 is fixed to the housing 1.

Further, a hole 21d serving as an orifice is formed in the bottom surface 21a of the cup member 21, and the two chambers 13a and 13b partitioned by the cup member 21 communicate with each other through the hole 21d, and the pipe C and the pipe are connected. The road A is connected.

On the other hand, as shown in FIG. 1, a protrusion 12a is formed at the tip of the partition wall 12. This protrusion 12a
Is formed by reducing the diameter of the partition wall 12. When the partition wall 12 is fitted in the recess 10, the cup member 21 is pressed by the protrusion 12 a, and the positioning and fixing of the cup member 21 in the axial direction of the recess 10 are performed. After the partition 12 is inserted into the recess 10, the surface of the housing 1 is fixed by caulking the surface of the housing 1 near the opening 10 a of the recess 10. The protrusion 12
Since “a” is configured to be separated from the inner wall surface of the concave portion 10, the periphery of the protruding portion 12 a of the partition wall 12 forms a room 13 b.

As shown in FIG. 1 and FIG.
The line A connecting the port 9 and the port 8 is formed by the port 9 and the recess 10.
A line A1 connecting the room 13b to the pressure increase control valve 2, a line A2 connecting the room 13b to the pressure increase control valve 2, and a line A3 connecting the pressure increase control valve 2 to the port 8. .

The conduit A1 is formed by extending a passage straight from the port 9 toward the room 13b of the recess 10. Line A2 is connected to port 9 and pressure increase control valve 2
Are offset in the H direction, so that they extend from the inner wall surface of the concave portion 10 in the H direction and the W direction,
That is, after the passage S is extended obliquely with respect to the axial direction of the recess 10, the passage S is connected to the passage T extending straight from the pressure increase control valve 2.

As shown in FIG. 2, the inlets of two pressure increasing control valves 2 arranged adjacent to each other on the left and right sides of the paper are connected by a pipe U extending in the W direction, and four pressure increasing control valves are provided. Valve 2
Two of which are arranged outside through room U through room 13
b.

The pipeline A3 is formed by extending the passage straight from the port 8 connected to the wheel cylinder toward the pressure increase control valve 2. The pipeline A is configured by the pipelines A1 to A3 configured as described above.

Next, the features of this embodiment will be described.

In the present embodiment, an adhesive circular first tape seal 30 is attached to the housing 1 so as to cover the upper surface of each damper 7, that is, the opening 10a of the concave portion 10. The first tape seal 30 plays a role of preventing foreign substances from entering the damper 7 and a role of a moisture-proof function.

The first tape seal 30 is, for example,
After vapor-depositing aluminum on a PET (polyethylene terephthalate) film having a thickness of about 0.1 mm, one side is coated with glue as an adhesive material.

Further, an adhesive second tape seal 31 is attached to the housing 1 so that all the ports 8 are covered. This second tape seal 31
Has a notch corresponding to the shape of the first tape seal 30, and the first tape seal 30 is located in this notch,
And the second tape seal 31 do not overlap. The second tape seal 31 has a shape partially protruding from the housing 1 when attached to the housing 1. The second tape seal 31 configured as described above plays a role of preventing foreign substances from entering the ports 8 and a role of a moisture-proof function.

The second tape seal 31 has the same thickness as that of the first tape seal 30, and is configured such that the adhesive force to the housing 1 is weaker than that of the first tape seal 30. I have. For example, the second tape seal 31 is formed by depositing aluminum on a PET (polyethylene terephthalate) film having a thickness of about 0.1 mm, applying a glue as an adhesive material to one surface, and again applying a glue as an adhesive material. It is configured by applying glue in a mesh shape. That is, the adhesive applied in a mesh shape reduces the adhesive strength of the adhesive applied first to the area, and the adhesive strength of the second tape seal 31 becomes weaker than the adhesive strength of the first tape seal 30. It has been like that.

In FIG. 2, the first and second tape seals 30 and 31 are indicated by oblique lines to make them easy to see.

Further, an adhesive transparent third tape seal 32 is attached to the first and second tape seals 30 and 31 so that the first tape seal 30 and the second tape seal 31 are covered. It is attached. When this third seal is attached to the first and second tape seals 30 and 31,
At the same location as the second tape seal 31, the shape is partially protruded from the housing 1. The adhesive strength of the third tape seal 32 applied to the surface of the first tape seal 30 is as follows.
0 is attached to the housing 1 so as to be weaker than the adhesive force.

Although the third tape seal 32 is not indispensable, the width of the sticker around each port 8 is narrow, so that when the air in each port 8 thermally expands, the second tape seal 31 is attached to the housing. Since the second tape seal 31 is covered with the third tape seal 32 because the third tape seal 32 covers the second tape seal 31, the second tape seal 31 may be separated due to thermal expansion. It can be prevented.

As described above, the first to third tape seals 3
The ABS actuator is transported with 0 to 32 attached. At this time, the first and second tape seals 30, 3
Since the first tape seal 31 is attached to the housing 1 so as not to overlap, the second tape seal 31 is not affected by a step due to the thickness of the first tape seal 30. Therefore, the second tape seal 31 ensures that each port 8
It can play a role of preventing foreign substances from entering the device and a role of a moisture-proof function.

On the other hand, when the ABS actuator is mounted on the vehicle, the second tape seal 31 is peeled off together with the third tape seal 32 by using the portion protruding from the housing 1 to expose each port 8 and each port 8 is exposed. 8 is connected to the wheel cylinder.

At this time, since the adhesive strength of the second tape seal 31 is weaker than the adhesive strength of the first tape seal 30, the second tape seal 31 is removed when the third tape seal 32 is peeled off. It is easy to peel off from the housing 1,
The first tape seal 30 does not easily come off the housing 1. Then, the first tape seal 30 is attached to the housing 1.
3rd tape seal 3 than the adhesive strength when affixed to
2 has been weakened when affixed to the surface of the first tape seal 30, the third tape seal 3
When peeling the second tape seal 2, the third tape seal 32 can be peeled from the housing 1 without peeling the first tape seal 30 from the housing 1.

As described above, by configuring the first tape seal 30 covering each damper 7 and each port 8 so that the second tape seal 31 does not overlap, each damper 7 and each port 8 are formed. It is possible to provide an ABS actuator having a configuration that can play a role of preventing foreign substances from getting into the device and a role of a moisture-proof function of each damper 7 and each port 8.

Then, the adhesive force of the first tape seal 30 and the adhesive force of the second tape seal 31 are made different from each other,
Of the first tape seal 30
The second tape seal 31 is easily peeled off from the housing 1 and the first tape seal 30 is hardly peeled off from the housing 1 by making the adhesive strength weaker than the adhesive strength. For this reason, when mounting the ABS actuator on a vehicle,
While allowing the second tape seal 31 to be easily peeled off from the housing 1, the housing 1 is mounted even after mounting on the vehicle.
, The first tape seal 30 can be prevented from peeling off.

Further, the adhesive force when the third tape seal 32 is adhered to the surface of the first tape seal 30 is smaller than the adhesive force when the first tape seal 30 is adhered to the housing 1. Is weakened, the first tape seal 30 can be prevented from peeling off the housing 1 when the third tape seal 32 is peeled off the housing 1.

(Other Embodiments) In the above embodiment, the case where the damper 7 is disposed on the same surface as each port 8 connected to the wheel cylinder has been described as an example. In place of the port and the damper 7, a port or a member that requires a function for preventing entry of other foreign matter or a moisture-proof function, for example, a reservoir is arranged on the same surface as each port 8, or the port of the master cylinder and the damper are the same. The above-described embodiment can be applied to a case where the light emitting device is arranged on a surface.

In the above embodiment, the second tape seal 31 is re-applied with mesh-like glue,
By reducing the adhesive area of the second tape seal 31, the adhesive strength of the second tape seal 31 is substantially weaker than the adhesive strength of the first tape seal 30. However, it is not necessary to use such a method. For example, an adhesive material having a different adhesive strength may be applied to the first and second tape seals 30 and 31 from the beginning.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an ABS actuator according to a first embodiment of the present invention.

FIG. 2 is a top view of the ABS actuator shown in FIG.

FIG. 3 is a top view of a conventional ABS actuator.

FIG. 4 is a top view of an ABS actuator prototyped by the present inventors.

FIG. 5 is a top view of an ABS actuator prototyped by the present inventors.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing, 6 ... Reservoir, 7 ... Damper, 8 ... Port, 10 ... Recess, 10a ... Opening, 30 ... 1st tape seal, 31 ... 2nd tape seal, 32 ... 3rd tape seal.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Noriyuki Hosoi 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Corporation (72) Inventor Hidehiro Kinoshita 1-1-1, Showa-cho, Kariya-shi, Aichi Co., Ltd. Within DENSO (72) Inventor Nobuo Hishida 5-2-38, Sakae, Naka-ku, Nagoya-shi, Aichi F-term in Yasu Shoji Co., Ltd. 3D046 BB00 CC02 LL23 LL37 LL55

Claims (8)

[Claims] 1. A housing (1) in which a hydraulic circuit through which brake fluid flows is formed, a port (8, 9) connected to a wheel cylinder or a master cylinder, and a recess forming a passage through which brake fluid flows. In the ABS actuator disposed on the same surface of the housing, the members (6, 7) including (10) cover the upper surface of the member including the recess (10). A first tape seal (30) affixed to the housing; and a second tape seal (31) affixed to the housing so as to cover the port. The second tape seal is arranged so as not to overlap with the second tape seal, and the adhesive force when the second tape seal is attached to the housing is the first tape seal.
An ABS actuator characterized in that the adhesive strength is lower than the adhesive strength when the tape seal is attached to the housing. 2. A third tape seal (32) is attached to a surface of the second tape seal,
2. The structure according to claim 1, wherein when the tape seal is peeled off from the housing, the second tape seal is also peeled off from the housing.
3. The ABS actuator according to claim 1. 3. The third tape seal is also attached to a surface of the first tape seal, and the adhesive force of the third tape seal to the first tape seal is less than the adhesive strength of the third tape seal to the housing. The adhesive force of the first tape seal is lower than that of the first tape seal.
3. The ABS actuator according to claim 1. 4. The A according to claim 2, wherein both the second tape seal and the third tape seal have a portion protruding from the housing.
BS actuator. 5. The first tape seal is provided with the first tape seal.
Notch corresponding to the tape seal of is formed,
5. The device according to claim 1, wherein the first tape seal is arranged in the cutout portion.
An ABS actuator according to any one of the preceding claims. 6. The ABS actuator according to claim 5, wherein the first tape seal has a circular shape. 7. The second tape seal has a film and an adhesive material applied to one surface of the film, and after the adhesive material is applied to one surface of the film, further applies to the one surface. The ABS actuator according to any one of claims 1 to 6, wherein the pressure-sensitive adhesive material is applied again. 8. The ABS actuator according to claim 7, wherein the adhesive material applied again to the second tape seal is applied to the one surface side in a mesh shape.