JP2000142352A - Assembly structure of solenoid valve in abs actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deflection and dislocation of a solenoid valve without needing a pressing member such as a leaf spring. SOLUTION: In this assembly structure, a yoke 8 is fitted into a recessed part 1a formed at a housing 1, and a part of the housing 1 positioned at the outer periphery of the yoke 8 is caulked to caulk and fix the yoke 8 to the housing 1. The yoke 8 is therefore fixed to the housing 1 without needing a pressing member such as a leaf spring, and the deflection and dislocation of the yoke 8 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art FIG. 6 shows an assembly structure of an ABS actuator used in a conventional vehicle brake control.
As shown in FIG. 6, in an ABS actuator conventionally used for vehicle brake control, a solenoid valve 300 used for hydraulic control is provided with a recess 30 formed in a housing 301.
1a, so that communication / shutoff control of a pipe C formed in the housing 301a can be performed. On the opposite side of the housing 301 with the electromagnetic valve 300 interposed therebetween, a case 302 containing electric wiring for ABS control is arranged, and a yoke 304 is arranged between the housing 301 and the case 302. ing.

In such an arrangement, the housing 301 is prevented from moving or displacing the yoke 304 between the case 302 and the housing 301 due to vibration or the like.
A leaf spring 303 is arranged between the electromagnetic valve 300 and the electromagnetic valve 300 (or between the yoke 304 and the case 302 although different from FIG. 6) so that the electromagnetic valve 300 is pressed toward the case 302.

[0004]

However, since the leaf spring 303 is required to prevent the yoke 304 from moving or being displaced, there is a problem that the number of parts increases, and the arrangement of the leaf spring 303 is increased. There is a problem that the size of the solenoid valve 300 is increased due to the necessity of a space for the operation.

The present invention has been made in view of the above problems, and has as its object to prevent the electromagnetic valve from being displaced and displaced without requiring a pressing member such as a leaf spring.

[0006]

In order to achieve the above object, the following technical means are employed. According to the first aspect of the present invention, the recess (1) formed in the housing (1).
a) has a yoke (8) fitted therein, and the yoke (8)
Is characterized in that a part of the housing (1) located on the outer periphery of the housing (1) is swaged and the yoke (8) is swaged and fixed to the housing (1).

As described above, the yoke (8) is fitted into the recess (1a) formed in the housing (1), and a part of the housing (1) located on the outer periphery of the yoke (8) is swaged. , The yoke (8) can be fixed to the housing (1). As a result, even if a pressing member such as a leaf spring is not required, it is possible to prevent the electromagnetic valve from being displaced or displaced.

Specifically, the caulking is fixed by caulking the housing (1) over the entire outer periphery of the yoke (8). Of the outer periphery of (8), the yoke (8)
This can be performed by caulking the housing (1) at a plurality of locations located at diagonal positions around the center.

According to the fourth aspect of the invention, the yoke (8) is press-fitted into the recess (1a) formed in the housing (1), whereby the yoke (8) is press-fitted and fixed to the housing (1). It is characterized by having. Thus, the recess (1a) formed in the housing (1)
By pressing the yoke (8) into the housing, the yoke (8) can be fixed to the housing (1) without requiring a pressing member such as a leaf spring. Thereby, claim 1
The same effect can be obtained.

[0010] The reference numerals in parentheses above indicate the correspondence with specific means described in the embodiment described later.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention. FIG. 1 shows an assembly structure of a solenoid valve 100 in an ABS actuator to which one embodiment of the present invention is applied. Hereinafter, an assembly structure of the solenoid valve 100 will be described with reference to FIG.

The solenoid valve 100 shown in FIG. 1 is a normally closed valve of a plunger type. For example, it is used as a pressure reducing control valve that is in a shut-off state during normal braking and is in a communicating state during pressure reduction control of ABS control. Is done. The pressure reducing control valve is in communication with the pressure reducing control to release brake fluid from the wheel cylinder side (not shown) to the ABS control reservoir, and to reduce the wheel cylinder pressure to avoid the tendency to lock the wheels. .

A housing 1 made of a metal such as aluminum has a pipe connected to a wheel cylinder and an AB.
A conduit A for connecting to the S control reservoir is provided, and a recess 1a communicating with the conduit A is formed. The electromagnetic valve 100 is inserted into a concave portion 1a formed in the housing 1 from the axial direction when the vertical direction of the drawing is taken as the axial direction of the electromagnetic valve 100, and then a part of the housing 1 is caulked by a method to be described later. Fixed to 1.

The solenoid valve 100 includes a plunger 2 having a ball valve 2a at its tip, a seat valve 3 which forms a valve seat 3a of the ball valve 2a and a passage 3b for the brake fluid, and a plunger 2. A spring 4, which is arranged in the recess 2b and pushes the plunger 2 in the direction of the seat valve 3, a substantially cylindrical sleeve 5 for accommodating the plunger 2 and the spring 4, and is arranged on one end side of the sleeve 5 to regulate the movement of the plunger 2 A stopper 6 for holding one end of the spring 4 is provided.

A coil 7 for forming a magnetic circuit is arranged on the outer periphery of the sleeve 5, and is energized through a terminal 7a. Further, a yoke 8 is arranged on the outer periphery of the coil 7. The yoke 8 has a substantially cup shape with a circular entrance, and can accommodate the coil 7, the sleeve 5, and the like from the entrance side of the cup shape.

A recess 1a formed in the housing 1
Has a circular shape similar to the yoke 8,
The entrance of the concave portion 1 a has a diameter slightly larger than the outer diameter of the yoke 8. The recess 1a has a stepped shape at a position where the tip of the yoke 8 is located, and the yoke 8 is positioned in the axial direction of the solenoid valve 100 at the stepped portion.

FIG. 2 is an enlarged view of the vicinity of the region 1b where the caulking is performed. As shown in this figure, in a region 1b located on the outer periphery of the yoke 8, the housing 1 is partially recessed, and the thickness of the housing 1 is reduced.
It is swaged in the direction of and is fixed. Thus, by crimping the housing 1, the yoke 8 can be fixed to the housing 1 without requiring a pressing member such as a leaf spring. In addition, since no pressing member such as a leaf spring is required, the electromagnetic valve 1 in the axial direction of the electromagnetic valve 100 is not required.
00 can be shortened. Thereby, the size of the solenoid valve 100 can be reduced.

An opening 8a is formed in the bottom surface of the cup of the yoke 8 having a cup shape.
The stopper 6 is arranged at the bottom. The sleeve 5 is made of stainless steel or the like, and the end of the sleeve 5 on the insertion direction side of the housing 1 is provided with a flange portion 5a whose diameter is partially increased by bending the sleeve 5 in the radial direction. The flange portion 5a is in contact with the wall surface inside the concave portion 1a formed in the housing 1. Further, in the sleeve 5, inside the flange portion 5a,
A core stator 9 is provided so as to go around the outer circumference of the sleeve 5. By crimping a part of the housing 1 located on the outer periphery of the core stator 9, the sleeve 5 is fixed to the housing 1 with the flange portion 5a in contact with the wall surface of the concave portion 1a formed in the housing 1.

A groove 10 is formed in the wall surface of the concave portion 1a in contact with the flange portion 5a so as to surround the plunger 2. An O-ring 11 is arranged in the groove 10. This O-ring 11 prevents the brake fluid interposed in the pipe A from leaking between the sleeve 5 and the housing 1 even if a thermal expansion difference occurs between the housing 1 and the sleeve 5. .

A filter 12 is provided to separate the pipe A from the solenoid valve 100, and foreign matter mixed in the brake fluid in the pipe A is caught between the ball valve 2a and the valve seat 3a. Not to be. The assembling of the solenoid valve 100 configured as described above is performed as follows. First, the seat valve 3 and the filter 12 are fixed in the pipe A formed in the housing 1 by press-fitting or the like. Then, after arranging the O-ring 11 in the groove 10, the sleeve 5 is arranged on the O-ring 11. A stopper 6 is fixed to the sleeve 5, and the plunger 2 is fitted into the cavity of the sleeve 5 together with the spring 4. Then, after positioning the core stator 9 on the outer periphery of the sleeve 5 and positioning the sleeve 5 in the radial direction, a part of the housing 1 located on the outer periphery of the core stator 9 is caulked with a jig such as a punch (not shown). Thereby, the flange portion 5a
The sleeve 5 is fixed to the housing 1 in a state where the sleeve 5 is in contact with the wall surface of the recess 1 a formed in the housing 1.

Next, after the coil 7 is inserted into the cavity of the yoke 8, the yoke 8 is inserted into the recess 1 formed in the housing 1.
a. Then, as shown in an enlarged view showing the state of caulking and fixing in FIG. 3, in the region 1b located on the outer periphery of the yoke 8, the housing 1 is pressed by the tip of the punch 50 and crushed. Thereby, the meat of the housing 1 is moved toward the yoke 8. As a result, the yoke 8 is swaged and fixed to the housing 1, and the yoke 8 is fixed to the housing 1.

The yoke 8 is fixed to the housing 1 by being assembled as described above. The solenoid valve 100 is operated by the elastic force of the spring 4 during normal braking.
a is in contact with the valve seat 3a to cut off the pipe A, and when the coil 7 is energized at the time of depressurization of the ABS control or the like, the plunger 2 is moved to the upper side in the drawing, and the ball valve 2a
Is moved away from the valve seat 3a and the pipe A is operated to conduct.

(Second Embodiment) In the present embodiment, the method of fixing the yoke 8 to the housing 1 is different from that of the first embodiment. FIG. 4 shows the solenoid valve 10 according to the present embodiment.
0 shows a cross-sectional configuration, and the configuration of the solenoid valve 100 will be described based on this drawing. However, the same components as those in the first embodiment are denoted by the same reference numerals as those in FIG.

In the first embodiment, as shown in FIG.
The yoke 8 is fixed by partially caulking the housing 1 in a region 1b located on the outer periphery of the yoke 8, but in the present embodiment, the yoke 8 is pressed into a concave portion 1b formed in the housing 1. , The yoke 8 is fixed to the housing 1. Specifically, as shown in FIG. 4, in the present embodiment, the size of the entrance of the recess 1b is made slightly smaller than the diameter of the yoke 8, and the yoke 8 is pressed into the entrance of the recess 1b. 8 is fixed to the housing 1.

As described above, by pressing the yoke 8 into the recess 1b formed in the housing 1, the yoke 8 can be fixed without the need for a pressing member such as a leaf spring and the like. Since the pressing member is not required, the length of the solenoid valve 100 in the axial direction of the solenoid valve 100 can be reduced, and the size of the solenoid valve 100 can be reduced.

(Third Embodiment) In the first and second embodiments, one embodiment of the present invention is applied to a normally closed valve that normally shuts off the pipe A and connects the pipe A when the coil 7 is energized. Although the case where the form is applied has been described, the present invention may be applied to a normally open valve that normally connects a pipe and shuts off the pipe when energizing the coil 7.

More specifically, FIG.
0 shows a cross-sectional configuration. This normally open valve 200
Is constituted by a plunger type solenoid valve, is housed in a recess 21 a formed in advance in the housing 21, and is fixed to the housing 21 by caulking a part of the housing 21. This normally open valve includes a body valve 22 having a ball valve 22a at the tip,
A seat valve 23 that forms a valve seat 23a of the ball valve 22a and forms a passage for the brake fluid, a spring 24 that pushes the body valve 22 away from the seat valve 23, and a substantially cylindrical cylinder 25 that houses the body valve 22 , A plunger 26 disposed at one end of the sleeve 27 for restricting the movement of the body valve 22.

The plunger 26 and the cylinder 25
Is housed in the sleeve 27. A coil 28 for forming a magnetic circuit is arranged on the outer periphery of the sleeve 27, and is energized through a terminal 28a. Further, the yoke 2
9 are arranged. The yoke 29 has a substantially cup shape having a circular entrance, and can accommodate the coil 28, the sleeve 27, and the like from the entrance side of the cup shape.

The shape of the entrance of the concave portion 21a formed in the housing 21 is circular like the yoke 29,
The entrance of the concave portion 21a has a diameter slightly larger than the outer diameter of the yoke 29. Also, the recess 21a is provided in the yoke 2
The position of the yoke 29 in the axial direction of the normally open valve 200 is formed at the step where the tip of the valve 9 is located.

The normally open valve 200 thus configured has the yoke 29 fixed by caulking a part of the housing 21 in an area 21 b of the housing 21 which is located on the outer periphery of the yoke 29. Fixed. Thus, the normally open valve 20
0, the normally-open valve 200 can be fixed without the need for a pressing member such as a leaf spring, and the pressing member such as a leaf spring is not required. The size of the mari-open valve 200 can be reduced.

The pipe B and the normally open valve 200
The filter 30 is disposed between the filter and the filter so that foreign matter does not enter the normally open valve 200 through the pipe B. (Other Embodiments) In the above embodiment, the yoke 8 may be caulked and fixed by caulking the entire outer periphery of the yoke 8, and a plurality of locations (for example, the (Four locations at diagonal positions).

[Brief description of the drawings]

FIG. 1 is a diagram showing an assembly structure of a solenoid valve 100 according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a swaged portion of the solenoid valve 100 shown in FIG.

FIG. 3 is a diagram for explaining a method of assembling the solenoid valve 100 shown in FIG.

FIG. 4 is a diagram showing an assembly structure of a solenoid valve 100 according to a second embodiment.

FIG. 5 is a diagram showing an assembly structure of a solenoid valve 100 according to a third embodiment.

FIG. 6 is a view showing a conventional structure for mounting an electromagnetic valve.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing, 1a ... recessed part, 1b ... Area fixed by caulking, 2a ... Ball valve, 2 ... Plunger, 2b ... Concave part,
3 ... seat valve, 3a ... valve seat, 4 ... spring, 5 ...
Sleeve 5a Flange 6 Stopper 7 Coil 8 Yoke 9 Core stator 10 Groove 11
.. O-ring, 12 filter, 100 solenoid valve, A pipe line.

Claims (4)

[Claims] 1. An ABS actuator which is disposed in a recess (1a) formed in a housing (1) of an ABS actuator,
An assembling structure of an electromagnetic valve for controlling communication interruption of a pipe (A) formed in the housing (1), wherein the electromagnetic valve has a plunger (2) having a valve body (2a).
And a valve seat (3a) on which the valve element (2a) is seated, a cylindrical sleeve (5) for accommodating the plunger (2), and a coil forming a magnetic circuit for driving the plunger (2). 7) and a yoke (8) surrounding the coil, wherein the plunger (2) slides in the sleeve (5) in accordance with the state of energization of the coil (7), and A body (2a) is seated on the valve seat (3a) to control communication and cutoff of the pipeline, and a yoke (8) is formed in a recess (1a) formed in the housing (1). Is inserted, and a part of the housing (1) located on the outer periphery of the yoke (8) is swaged, so that the yoke (8) is swaged and fixed to the housing (1). Mounting structure of solenoid valve. 2. The assembling structure of an electromagnetic valve according to claim 1, wherein the caulking is fixed by caulking the housing (1) over the entire outer periphery of the yoke (8). . 3. The caulking is performed by caulking the housing (1) at a plurality of diagonal positions around the yoke (8) on the outer periphery of the yoke (8). The assembly structure for an electromagnetic valve according to claim 1, wherein: 4. It is arranged in a recess (1a) formed in the housing (1) of the ABS actuator,
An assembling structure of an electromagnetic valve for controlling communication interruption of a pipe (A) formed in the housing (1), wherein the electromagnetic valve has a plunger (2) having a valve body (2a).
And a valve seat (3a) on which the valve element (2a) is seated, a cylindrical sleeve (5) for accommodating the plunger (2), and a coil forming a magnetic circuit for driving the plunger (2). 7) and a yoke (8) surrounding the coil, wherein the plunger (2) slides in the sleeve (5) in accordance with the state of energization of the coil (7), and A body (2a) is seated on the valve seat (3a) to control communication and cutoff of the pipeline, and a yoke (8) is formed in a recess (1a) formed in the housing (1). The yoke (8) is press-fitted and fixed to the housing (1) by press-fitting.