JP3882482B2 - Brake hydraulic pressure control actuator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a brake fluid pressure control actuator (hereinafter referred to as an ABS actuator ) used for vehicle brake fluid pressure control.
[0002]
[Prior art]
FIG. 3 shows a top view of a conventional ABS actuator. As shown in FIG. 3, a plurality of ports 8 connected to the wheel cylinders are formed on the upper surface of the ABS actuator housing, and a damper 7 for attenuating pulsation of brake fluid discharged from the pump is provided. Has been placed.
[0003]
This ABS actuator is transported in a state where the upper surface shown in FIG. In such a state, there is a risk of foreign matter entering each port 8 or each damper 7. To prevent this, each port 8 is covered with a rubber stopper 50 and taped on the upper surface of each damper 7. The seal 51 is pasted. Although the rubber plug 50 for tightening each port 8 is removed when the vehicle is mounted, the tape seal 51 attached to the upper surface of the damper 7 remains attached to the ABS actuator even after being mounted on the vehicle. It is composed of things that have both.
[0004]
[Problems to be solved by the invention]
However, the rubber plug 50 for tightening the lid of each port 8 plays a role of preventing the entry of foreign matter into each port 8, but is not suitable for long-term conveyance because it did not fulfill the moisture-proof function at each port 8.
[0005]
An object of the present invention is to provide an ABS actuator having a seal structure that can play a role of preventing the entry of foreign matter into each port and can also play a moisture-proof function of each port.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present inventors have conducted the following trial manufacture.
[0007]
First, as shown in FIG. 4, after a tape seal 51 is pasted on the upper surface of the damper 7, a seal structure in which a transparent tape seal 52 covering all the ports 8 is pasted on the upper surface of the housing 1 is manufactured. did.
[0008]
In such a seal structure, the tape seal 52 is peeled off when the ABS actuator is mounted on the vehicle, and the 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 remains on the ABS actuator even after the vehicle is mounted.
[0009]
However, in such a seal structure, since the tape seal 52 covering all the ports 8 is pasted from above the tape seal 51 on the upper surface of the damper 7, a step between the tape seal 51 and the housing 1 is caused by a step due to the tape seal 51. A gap (indicated by a hatched portion in the figure) was formed in the port, and moisture was introduced into the port through this gap, and it was found by examination that the moisture-proof function could not be secured.
[0010]
Therefore, as shown in FIG. 5, the tape seal 60 indicated by the hatched portion in the drawing in which each damper 7 is included and a hole 60 a is formed at a position corresponding to each port 8 is formed in the first layer. A seal structure in which the hole 60a corresponding to the port 8 and the tape seal 61 covering the top of the tape seal 60 are arranged in the second layer was manufactured as a prototype.
[0011]
As a result, it is possible to prevent foreign matters from entering the respective ports 8 and the respective dampers 7, and also to fulfill the role of the moisture-proof function of the respective ports 8 and the respective dampers 7.
[0012]
However, in such a structure, when the second-layer tape seal 61 is to be peeled off when mounted on the vehicle, the end portion 60b located around the port 8 of the first-layer tape seal 60 is peeled off accordingly. It became clear by examination. This is considered to be due to the small amount of sticking around the port 8 where the first-layer tape seal is stuck to the housing 1.
[0013]
Therefore, based on the above-described trial examination, the invention according to claim 1 includes a housing (1) in which a hydraulic circuit through which brake fluid flows is formed, and a port (8, 8) connected to a wheel cylinder or a master cylinder. 9) and a member (6, 7) configured to include a recess (10) that constitutes a passage through which the brake fluid flows include a recess in the brake fluid pressure control actuator disposed on the same surface of the housing. A first tape seal (30) affixed to the housing so as to cover the upper surface of the member constituted by: a second tape seal (31) affixed to the housing so as to cover the port ; a first tape sealing surface and a third attached to the second tape sealing surface and a tape seal (32), a first sealing tape and the second tape Sea : It is arranged so as not to overlap, and the adhesive force when pasted second tape seal housing becomes weaker than the adhesive force when pasted first tape seal housing, third When the second tape seal is peeled off from the housing, the second tape seal is also peeled off from the housing, and the adhesive force of the third tape seal against the first tape seal is determined by the first tape against the housing. It is characterized by being weaker than the adhesive strength of the seal .
[0014]
In this way, by preventing the first tape seal and the second tape seal from overlapping each other, it is possible to play a role of preventing entry of foreign matter into each member and each port including the recess, and It can also serve as a moisture-proof function in each member and each port configured to include a recess.
[0016]
In addition, when the third tape seal is attached to the upper surface of the second tape seal in this way, the second expansion is caused by the thermal expansion of the air in each port when the width of the attachment white around each port is narrow. It can be prevented that the tape seal is peeled off from the housing and the moisture-proof function cannot be performed at the peeled portion.
[0017]
Then, in this case, the adhesive force of the third tape seal to the first tape seal, if weaker than the adhesive force of the first tape seal against the housing, the first tape with the third sealing tape The seal will not peel off the housing.
[0018]
The invention according to claim 2 is characterized in that both the second tape seal and the third tape seal have a portion protruding from the housing. With such a configuration, the second and third tape seals can be easily peeled off from the housing using the portion protruding from the housing.
[0019]
In the invention according to claim 3 , the second tape seal is formed with a notch corresponding to the first tape seal, and the first tape seal is arranged at the notch portion. It is characterized by being composed.
[0020]
Thus, by forming a 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 each other. For example, as shown in claim 6, when the first tape seal has a circular shape, a notch corresponding to the circular shape is formed in the second tape seal.
[0021]
In the invention according to claim 5 , the second tape seal has a film and an adhesive material applied to one surface side of the film, the adhesive material is applied to one surface side of the film, and the one surface side It is characterized in that the adhesive material is applied again.
[0022]
Thus, after applying an adhesive material to the one surface side of a film, the adhesive force of an adhesive material can be reduced by apply | coating an adhesive material again. For example, as shown in claim 6 , the adhesive material may be applied again to the one surface side of the film in a mesh shape.
[0023]
In addition, the code | symbol in the bracket | parenthesis of each said means shows the correspondence with the specific means as described in embodiment mentioned later.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, the present invention will be described according to embodiments shown in the drawings. Here, the case where the present invention is applied to an ABS actuator of a type provided with a total of eight control valves (so-called eight solenoid type) will be described.
[0025]
FIG. 1 shows a step front view of a part of an ABS actuator 100 to which an embodiment of the present invention is applied. FIG. 2 shows a top view of the ABS actuator shown in FIG. 1 when viewed from the upper side of FIG. Hereinafter, the configuration of the ABS actuator 100 will be described with reference to FIGS. 1 and 2.
[0026]
The ABS actuator 100 is disposed between a master cylinder and a wheel cylinder (not shown). As shown in FIGS. 1 and 2, the ABS actuator 100 includes an aluminum housing 1 made up of a substantially hexahedron in which various pipes (brake fluid passages) are formed. The elements are assembled and configured.
[0027]
Various control valves 2 and 3 for controlling the flow of the brake fluid in the brake pipe are arranged on one surface (second predetermined surface) side of the housing 1. In this embodiment, as shown in FIG. 2, four control valves 2 (3) are arranged in the W direction perpendicular to the H direction and the L direction, and two in the H direction as shown in FIG. A total of eight control valves 2 and 3 are provided. In addition, the motor 1 is provided on a surface (third predetermined surface) of the housing 1 opposite to the surface on which the various control valves 2 and 3 are disposed. 4 is arranged. The motor 4 drives the pump 5.
[0028]
Further, the surface of the housing 1 that 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, and the surface on which the various control valves 2 and 3 are disposed and the motor 4 The reservoir 6 is disposed on one surface that is substantially perpendicular to the disposed surface. And the damper 7 is arrange | positioned in the surface (1st predetermined surface) facing the surface where this reservoir | reserver 6 is arrange | positioned.
[0029]
Further, as shown in FIG. 2, a total of four ports 8 connected to the wheel cylinders are formed on one side of the housing 1 where the damper 7 is disposed. Each of these ports 8 is formed so as to communicate with each of the pressure increase control valves 2. A total of two ports 9 connected to the master cylinder are formed on one side where the motor 4 is disposed. One of these ports 9 is connected to the two pressure increase control valves 2 on the right side of the paper, and the other is connected to the two pressure increase control valves 2 on the left side of the paper. One surface on which the dampers 7 and the ports 8 are arranged is a surface facing the sky when the ABS actuator is transported and mounted on the vehicle.
[0030]
The specific connection relationship of each component is as follows.
[0031]
A port 9 connected to the master cylinder and a port 8 connected to the wheel cylinder are connected by a pipe line A. This line A is provided with a pressure increase control valve 2, and the pressure increase control valve 2 can control the communication and blocking states of the line A. A pipe B connected to the reservoir 6 is connected to the pipe A between the pressure increase control valve 2 and the wheel cylinder. The pipe B is provided with a pressure reducing control valve 3 for controlling the flow of brake fluid to the reservoir 6.
[0032]
Further, the conduit A and the reservoir 6 are connected by the conduit C between the master cylinder and the pressure increase control valve 2 in order to return the brake fluid released to the reservoir 6 to the conduit A. The pipe C is provided with a pump 5 for sucking and discharging brake fluid in the reservoir 6 and a damper 7 for attenuating pulsation of brake fluid discharged from the pump 5.
[0033]
Specifically, the damper 7 has an H direction in a substantially cylindrical recess 10 centering on the H direction formed by partially cutting or denting the surface on which the port 8 of the wheel cylinder is formed. After a cup member (partition member) 21 serving as a shaft is fitted, a lid-like partition wall 12 is fitted into the inlet of the recess 10. The space in the recess 10 is partitioned into the two-part chambers 13a and 13b by the cup member 21, and one of the chambers (first chamber) 13a serves as a damper chamber. The room 13a constituting the dump chamber is connected to the pipe C, and the other room (second room) 13b is connected to the pipe A.
[0034]
The cup member 21 is configured in a cup shape having an opening on one side and a bottom surface 21a having a substantially circular shape. The cup member 21 is inserted into the concave portion 10 from the opening side, but the mouth (tip of the opening portion) 21b of the cup member 21 is narrowed and squeezed with a diameter smaller than other portions, so that it can be easily inserted into the concave portion 10. It can be inserted.
[0035]
In addition, a press-fit portion 21 c having a partially enlarged diameter is formed on the side wall of the cup member 21. When the cup member 21 is inserted into the recess 10, the press-fitting portion is press-fitted into the recess 10, and the cup member 10 is fixed to the housing 1.
[0036]
Furthermore, 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. Are to be connected.
[0037]
On the other hand, as shown in FIG. 1, a protrusion 12 a is formed at the tip of the partition wall 12. The protruding portion 12a is configured by reducing the diameter of the partition wall 12. When the partition wall 12 is fitted into 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 is performed. The partition wall 12 is fixed by caulking the surface of the housing 1 in the vicinity of the opening 10 a of the recess 10 after being inserted into the recess 10. In addition, since the protrusion part 12a is comprised so that it may space apart from the inner wall face of the recessed part 10, the circumference | surroundings of the protrusion part 12a of the partition 12 comprise the room 13b.
[0038]
As shown in FIGS. 1 and 2, the pipe A connecting the port 9 and the port 8 includes the pipe A1 connecting the port 9 and the chamber 13b of the recess 10, the chamber 13b, and the pressure increase control valve. 2, and a pipe line A <b> 3 that connects the pressure increase control valve 2 and the port 8.
[0039]
The pipe line A1 is configured by extending a passage straight from the port 9 toward the room 13b of the recess 10. Since the port 9 and the pressure increase control valve 2 are offset in the H direction, the pipe A2 extends from the inner wall surface of the recess 10 in the H direction and the W direction, that is, with respect to the axial direction of the recess 10. After the passage S is extended in an oblique direction, the passage S and the passage T extending straight from the pressure increase control valve 2 are connected.
[0040]
As shown in FIG. 2, the inlets of two pressure increase control valves 2 arranged adjacent to each other on the left and right sides of the paper are connected by a pipe line U extending in the W direction. Two of them arranged outside are connected to the room 13b through the pipe line U.
[0041]
The pipe line A3 is configured by extending a passage straight from the port 8 connected to the wheel cylinder toward the pressure increase control valve 2. Pipe line A is comprised by pipe line A1-A3 comprised in this way.
[0042]
Next, the characteristic part of this embodiment is demonstrated.
[0043]
In this embodiment, an adhesive first circular tape seal 30 is attached to the housing 1 so that the upper surface of each damper 7, that is, the opening 10 a of the recess 10 is covered. The first tape seal 30 serves to prevent foreign matter from entering the damper 7 and to play a moisture-proof function.
[0044]
The first tape seal 30 is configured, for example, by depositing aluminum on a PET (polyethylene terephthalate) film having a thickness of about 0.1 mm and then applying glue as an adhesive material on one surface.
[0045]
Moreover, the adhesive 2nd tape seal 31 is affixed on the housing 1 so that all the ports 8 may be covered. The second tape seal 31 has a shape in which a notch corresponding to the shape of the first tape seal 30 is formed. The first tape seal 30 is located in the notch, and the first tape seal 31 The tape seal 30 and the second tape seal 31 are not overlapped. The second tape seal 31 has a shape that partially protrudes from the housing 1 when it is attached to the housing 1. The second tape seal 31 configured as described above plays a role of preventing entry of foreign matter into each port 8 and a function of moisture-proof function.
[0046]
The second tape seal 31 has a thickness similar to that of the first tape seal 30, and is configured such that the adhesive force with respect to the housing 1 is weaker than that of the first tape seal 30. For example, the second tape seal 31 is formed by depositing aluminum as an adhesive material on one surface after depositing aluminum on a PET (polyethylene terephthalate) film having a thickness of about 0.1 mm. It is configured by applying glue in mesh form. That is, the adhesive applied in the mesh shape lowers the adhesive strength of the adhesive previously applied to the region, and the adhesive strength of the second tape seal 31 is weaker than the adhesive strength of the first tape seal 30. Has been.
[0047]
In FIG. 2, the first and second tape seals 30 and 31 are indicated by hatched portions so that they can be easily seen.
[0048]
Further, a transparent third tape seal 32 having adhesiveness 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. . The third seal has a shape that partially protrudes from the housing 1 at the same location as the second tape seal 31 when it is attached to the first and second tape seals 30 and 31. Further, the adhesive force when the third tape seal 32 is attached to the surface of the first tape seal 30 is weaker than the adhesive force when the first tape seal 30 is attached to the housing 1. It is configured.
[0049]
The third tape seal 32 is not essential, but since the width of the sticking white around each port 8 is narrow, the second tape seal 31 is peeled off from the housing 1 when the air in each port 8 is thermally expanded. Since the moisture-proof function may not be performed at the peeled portion, the second tape seal 31 is covered with the third tape seal 32 so that the second tape seal 31 can be prevented from peeling off due to thermal expansion. It has become.
[0050]
In this way, the ABS actuator is conveyed with the first to third tape seals 30 to 32 being applied. At this time, since the first and second tape seals 30 and 31 are attached to the housing 1 so as not to overlap, the second tape seal 31 is affected by a step due to the thickness of the first tape seal 30. Not receive. For this reason, the second tape seal 31 can surely play a role of preventing entry of foreign matter into each port 8 and a function of moisture-proof function.
[0051]
On the other hand, when the ABS actuator is mounted on the vehicle, the portion protruding from the housing 1 is used to peel off the second tape seal 31 together with the third tape seal 32 to expose each port 8, and each port 8 and wheel Connect to the cylinder.
[0052]
At this time, since the adhesive force of the second tape seal 31 is weaker than that of the first tape seal 30, the second tape seal 31 is removed from the housing 1 when the third tape seal 32 is peeled off. It becomes easy to peel off, and the first tape seal 30 becomes difficult to peel off from the housing 1. Then, the adhesive force when the third tape seal 32 is attached to the surface of the first tape seal 30 is weaker than the adhesive force when the first tape seal 30 is attached to the housing 1. Therefore, when the third tape seal 32 is peeled off, the third tape seal 32 can be peeled off from the housing 1 without removing the first tape seal 30 from the housing 1.
[0053]
As described above, the first tape seal 30 covering each damper 7 and each port 8 are configured so that the second tape seal 31 does not overlap with each other, so that foreign matter to each damper 7 and each port 8 is obtained. It is possible to provide an ABS actuator having a configuration that can play the role of preventing moisture from entering and can also play the role of the moisture-proof function of each damper 7 and each port 8.
[0054]
Then, the adhesive force of the first tape seal 30 and the adhesive force of the second tape seal 31 are made different so that the adhesive force of the second tape seal 31 is weaker than the adhesive force of the first tape seal 30. By doing so, the second tape seal 31 is easily peeled off from the housing 1, and the first tape seal 30 is difficult to peel off from the housing 1. For this reason, when the ABS actuator is mounted on the vehicle, the second tape seal 31 can be easily peeled off from the housing 1 while the first tape seal 30 is not peeled off from the housing 1 even after the vehicle is mounted. it can.
[0055]
Furthermore, the adhesive force when the third tape seal 32 is attached to the surface of the first tape seal 30 is weaker than the adhesive force when the first tape seal 30 is attached to the housing 1. By doing so, it is possible to prevent the first tape seal 30 from being peeled off from the housing 1 when the third tape seal 32 is peeled off from the housing 1.
[0056]
(Other embodiments)
In the said embodiment, although the case where the damper 7 was arrange | positioned on the same surface as each port 8 connected to a wheel cylinder was mentioned as an example, it replaced with the port and damper 7 which are connected to a wheel cylinder, and other Even when a port or member that requires a foreign matter entry prevention function or a moisture prevention function, for example, a reservoir is arranged on the same surface as each port 8 or a port and a damper of the master cylinder are arranged on the same surface, The above embodiment can be applied.
[0057]
Moreover, in the said embodiment, by reducing the area | region which has adhesive force among the 2nd tape seals 31 by re-applying the mesh-like glue to the 2nd tape seal 31, it is substantially 2nd. The adhesive strength of the tape seal 31 is made weaker than the adhesive strength of the first tape seal 30. However, such a method may not be used. For example, adhesive materials having different adhesive forces 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 broken 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 inventors.
FIG. 5 is a top view of an ABS actuator prototyped by the inventors.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Housing, 6 ... Reservoir, 7 ... Damper, 8 ... Port, 10 ... Recessed part,
10a ... opening, 30 ... first tape seal, 31 ... second tape seal,
32 ... Third tape seal.

Claims (6)

It has a housing (1) in which a hydraulic circuit through which brake fluid flows is formed, and includes ports (8, 9) connected to a wheel cylinder or a master cylinder, and a recess (10) that constitutes a passage through which brake fluid flows. In the brake fluid pressure control actuator disposed on the same surface of the housing, the members (6, 7) configured by:
A first tape seal (30) affixed to the housing so as to cover an upper surface of a member including the recess (10);
A second tape seal (31) affixed to the housing so as to cover the port ;
A third tape seal (32) affixed to the surface of the first tape seal and the surface of the second tape seal ;
The first tape seal and the second tape seal are arranged so as not to overlap each other, and the adhesive force when the second tape seal is attached to the housing causes the first tape seal to move to the housing. It is weaker than the adhesive strength when pasted on ,
When the third tape seal is peeled off from the housing, the second tape seal is also peeled off from the housing accordingly.
And the adhesive force of the said 3rd tape seal with respect to a said 1st tape seal is weaker than the adhesive force of the said 1st tape seal with respect to the said housing, The actuator for brake hydraulic pressure control characterized by the above-mentioned. Wherein the second tape sealing the third tape seal together, the brake fluid pressure control actuator according to claim 1, characterized in that it has a portion protruding from said housing. The second tape seal is formed with a notch corresponding to the first tape seal, and the first tape seal is arranged in the notch portion. The brake fluid pressure control actuator according to claim 1 or 2 . The brake fluid pressure control actuator according to claim 3 , wherein the first tape seal has a circular shape. The second tape seal has a film and an adhesive material applied to one side of the film, and after the adhesive material is applied to one side of the film, the adhesive material is applied again to the one side. The brake fluid pressure control actuator according to any one of claims 1 to 3 , wherein the brake fluid pressure control actuator is configured as described above. 6. The brake fluid pressure control actuator according to claim 5, wherein the adhesive material reapplied to the second tape seal is applied in a mesh shape to the one surface side.

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