阅读说明：本技术 电磁阀单元 (Solenoid valve unit ) 是由 小樱英明 福永秀二 山中尊史 于 2019-09-09 设计创作，主要内容包括：本发明提供一种电磁阀单元,其能够在充分确保了控制设备的容纳部与电磁阀单元之间所需的回弹力的状态下,容易且准确地将电磁阀单元安装于容纳部,并且能够防止因搬运、处理时的振动等而导致环状弹性部件从电磁阀单元的肩部脱落。一种电磁阀单元(1),其被夹持并保持在控制设备(10)的容纳部(14A)的承接部(14d)与按压部件(15)之间,其中,电磁阀单元(1)具有：肩部(2b),其与容纳部(14A)的承接部(14d)相对；以及环状弹性部件(7),其具有插入到形成于肩部(2b)的凹部(2f)中的凸部(7b),环状弹性部件(7)具备环状的变形部(7a),其在轴线方向上不与凸部(7b)重叠而允许轴向上的变形。(The invention provides a solenoid valve unit, which can be easily and accurately installed on an accommodating part of a control device under the condition of fully ensuring the required resilience force between the accommodating part and the solenoid valve unit, and can prevent an annular elastic component from falling off from a shoulder part of the solenoid valve unit due to vibration during transportation and treatment. An electromagnetic valve unit (1) that is sandwiched and held between a receiving portion (14d) of a housing portion (14A) of a control apparatus (10) and a pressing member (15), wherein the electromagnetic valve unit (1) has: a shoulder (2b) that faces the receiving section (14d) of the housing section (14A); and an annular elastic member (7) having a convex portion (7b) inserted into a concave portion (2f) formed in the shoulder portion (2b), wherein the annular elastic member (7) is provided with an annular deformation portion (7a) which does not overlap with the convex portion (7b) in the axial direction and allows deformation in the axial direction.)

1. An electromagnetic valve unit is clamped and held between a receiving portion of a housing portion of a control device and a pressing member,

the electromagnetic valve unit includes:

a shoulder portion opposing the receiving portion of the receiving portion; and

an annular elastic member having a convex portion inserted into a concave portion formed in the shoulder portion,

the annular elastic member includes an annular deformation portion that allows deformation in the axial direction without overlapping the projection in the axial direction.

2. The solenoid valve unit according to claim 1,

the deformation portion is disposed along an outer peripheral surface of the shoulder portion.

3. The solenoid valve unit according to claim 1 or 2, wherein,

the outer diameter of the deformation portion is smaller than the inner diameter of the accommodation portion.

4. The solenoid valve unit according to any one of claims 1 to 3, wherein,

the convex portion has a circumferentially continuous ring shape, the concave portion has a circumferentially continuous ring shape, and the convex portion is inserted into the concave portion.

5. The solenoid valve unit according to any one of claims 1 to 3, wherein,

the convex portion is formed locally in the circumferential direction, the concave portion is formed locally in the circumferential direction, and the convex portion is pressed into the concave portion.

6. The solenoid valve unit according to any one of claims 1 to 5, wherein,

the recess is formed to retain the wall portion in the axial direction and to be recessed in the inner diameter direction of the shoulder portion.

7. The solenoid valve unit according to any one of claims 1 to 5, wherein,

the recess is formed to be recessed toward an axial direction of the shoulder.

Technical Field

The present invention relates to a solenoid valve unit that is mounted to a control apparatus and controls fluid inside.

Background

In general, the opening degree of a flow path in a control device and the flow rate of a control fluid are adjusted by a solenoid valve unit including a coil and a movable iron core, and such a solenoid valve unit is often mounted and used in such a manner as to be accommodated in an accommodating portion or the like facing the flow path of the control device for controlling the fluid.

The solenoid valve unit disclosed in patent document 1 is housed in a yoke having a cylindrical shape with a bottom, and a valve sleeve is caulked to the yoke in a state of being pushed in from an opening portion side of the yoke, and the solenoid valve unit is disposed so as to be sandwiched between a bottom portion of the yoke and a valve sleeve. The wave washer is disposed between the bottom of the yoke and the main body of the solenoid valve unit, and even if the caulking portion between the yoke and the valve sleeve becomes loose due to aging or the like, the main body of the solenoid valve unit can be pressed against the valve sleeve by the repulsive force of the wave washer, thereby suppressing the loosening of the main body of the solenoid valve unit in the yoke.

Instead of such a wave washer or the like having a high repulsive force, an elastic member having a small repulsive force, which is made of rubber, synthetic resin, or the like, and is disposed between a bottom portion (receiving portion) of a housing portion of the control device and a main body portion of the solenoid valve unit, is also used. A ring-shaped elastic member 700 shown in fig. 11 is held at the shoulder 200 of the solenoid valve unit 100 opposite to the bottom 140a of the housing 140 in the control apparatus 110. Specifically, the shoulder 200 is formed by cutting an upper end side corner of the main body of the solenoid valve unit 100 in the circumferential direction, and has a stepped shape including a horizontal surface 100b horizontally extending in the inner radial direction from the outer peripheral surface 100a of the main body of the solenoid valve unit 100 and a vertical surface 100c rising upward from the inner radial side end of the horizontal surface 100b, and the elastic member 700 is externally fitted to the vertical surface 100 c. Thus, the main body portion of the solenoid valve unit 100 can be inserted into the housing portion 140 integrally with the elastic member 700, and therefore, there are advantages as follows: not only is the insertion operation of the solenoid valve unit 100 simple, but also the amount of pressing the solenoid valve unit 100 toward the bottom portion 140a of the housing portion 140 does not require high accuracy.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2015-102150 (page 8, FIG. 1)

Disclosure of Invention

Problems to be solved by the invention

However, in the case of using the elastic member 700 such as rubber or synthetic resin as disclosed in patent document 1, if the fastening force of the elastic member 700 to the shoulder portion 200, specifically, the vertical surface 100c of the solenoid valve unit 100 is weak, the solenoid valve unit 100 may be twisted during the insertion operation of the solenoid valve unit 100, and if the elastic member 700 is pressed between the shoulder portion 200 and the bottom portion 140a of the housing portion 140 in the twisted state, the main body portion of the solenoid valve unit 100 may not be accurately attached to the housing portion 140. On the other hand, when the fastening force of the elastic member 700 with respect to the shoulder 200, specifically, the vertical surface 100c is enhanced, the internal stress in the radial direction of the elastic member 700 becomes large, and there is a problem that the required resilient force between the accommodating portion 140 and the shoulder 200 of the solenoid valve unit 100 cannot be sufficiently secured.

The present invention has been made in view of the above problems, and an object thereof is to provide a solenoid valve unit that can be easily and accurately attached to a housing portion of a control device while sufficiently securing a repulsive force required between the housing portion and the solenoid valve unit.

Means for solving the problems

In order to solve the above problems, the solenoid valve unit of the present invention,

which is clamped and held between a receiving portion of the control device and a pressing member, wherein,

the electromagnetic valve unit includes: a shoulder portion opposing the receiving portion of the receiving portion; and an annular elastic member having a convex portion inserted into a concave portion formed in the shoulder portion, the annular elastic member including an annular deformation portion that allows deformation in the axial direction without overlapping the convex portion in the axial direction.

In the solenoid valve unit, the convex portion of the annular elastic member is inserted into and fixed to the concave portion of the shoulder portion, and when the shoulder portion of the solenoid valve unit is pressed toward the receiving portion side of the housing portion of the control device, the annular deformable portion of the annular elastic member that does not overlap with the convex portion in the axial direction is deformed in the axial direction. Further, since the convex portion of the annular elastic member is inserted into and fixed to the concave portion of the shoulder portion, the annular elastic member can be prevented from coming off the shoulder portion of the solenoid valve unit due to vibration or the like during transportation or handling of the solenoid valve unit.

Preferably, the deformation portion is disposed along an outer peripheral surface of the shoulder portion.

Thus, the shoulder portion restricts twisting or the like of the deformation portion, and therefore the deformation portion can be accurately pinched between the shoulder portion and the receiving portion.

Preferably, the outer diameter of the deformation portion is smaller than the inner diameter of the accommodation portion.

This makes it easy to insert the solenoid valve unit into the housing portion, and the deformation portion can be deformed in the outer diameter direction, so that the amount of deformation in the axial direction of the deformation portion can be sufficiently ensured.

Preferably, the convex portion has a circumferentially continuous ring shape, the concave portion has a circumferentially continuous ring shape, and the convex portion is inserted into the concave portion.

This makes it possible to hold the annular elastic member in the shoulder portion of the solenoid valve unit with good balance in the circumferential direction.

Preferably, the convex portion is formed locally in the circumferential direction, the concave portion is formed locally in the circumferential direction, and the convex portion is pressed into the concave portion.

This can restrict the rotation of the annular elastic member in the circumferential direction.

Preferably, the recess is formed to retain the wall portion in the axial direction and to be recessed in the inner diameter direction of the shoulder portion.

Therefore, when the annular elastic member moves in the separating direction, the protruding portion is hooked on the wall portion, and therefore the annular elastic member is less likely to fall off the shoulder portion.

Preferably, the recess is formed to be recessed toward an axial direction of the shoulder.

Thus, the convex portion and the deforming portion are mounted in the same direction, and the annular elastic member can be easily mounted on the shoulder portion.

Drawings

Fig. 1 is a schematic cross-sectional view showing a damper device including a solenoid valve unit according to embodiment 1 of the present invention;

fig. 2 is a front sectional view showing a solenoid valve unit in embodiment 1;

FIG. 3 is a perspective view showing an elastic member in example 1;

fig. 4 is a front sectional view showing a state in which the elastic member is attached to a shoulder portion of the solenoid valve unit in embodiment 1;

fig. 5 is a front sectional view showing a state in which the solenoid valve unit in embodiment 1 is attached to a housing;

FIG. 6 is a perspective view showing an elastic member in example 2 of the present invention;

fig. 7 is a front sectional view showing a state in which the elastic member is attached to a shoulder portion of the solenoid valve unit in embodiment 2;

FIG. 8 is a sectional view A-A of FIG. 7;

FIG. 9 is a perspective view showing an elastic member in example 3 of the present invention;

fig. 10 is a front sectional view showing a state in which the elastic member is attached to the shoulder portion of the solenoid valve unit in embodiment 3;

fig. 11 is a front sectional view showing a state in which an elastic member is attached to a shoulder portion of a solenoid valve unit in a conventional example.

Detailed Description

Hereinafter, a mode of a solenoid valve unit for carrying out the present invention will be described based on examples.

Example 1

A solenoid valve unit according to embodiment 1 will be described with reference to fig. 1 to 5. Hereinafter, the front side of the drawing sheet of fig. 1 is referred to as the front side (front side) of the solenoid valve unit, and the left and right sides as viewed from fig. 1 are referred to as the left and right sides of the solenoid valve unit.

The solenoid valve unit 1 of the present invention is mounted on a shock absorber 10 (control device) that is installed in a vehicle such as an automobile and that is used together with a spring that reduces vibration transmitted from a road surface to a vehicle body during running, and adjusts a damping force exerted by the shock absorber 10 by controlling a flow rate of a fluid passing through a piston 14.

First, the structure of the shock absorber 10 will be described. As shown in fig. 1, the shock absorber 10 includes: a cylindrical cylinder 11 that contains a fluid; a piston rod 12 that is axially relatively movable with respect to the cylinder 11; and a piston 14 provided at an end of the piston rod 12, having a piston ring 13 attached to an outer periphery thereof, and dividing a space in the cylinder 11 into a first liquid chamber R1 and a second liquid chamber R2 by the piston 14. The piston 14 has a bottomed cylindrical shape (see fig. 2) opening downward, and a plurality of through holes 14a penetrating in the radial direction are formed in the circumferential direction above the piston ring 13.

As shown in fig. 2, the solenoid valve unit 1 is accommodated in an accommodation recess 14A serving as an accommodation portion of the piston 14, and a cylindrical body 15 serving as a pressing member is screwed to a lower end side of the solenoid valve unit 1, the cylindrical body 15 includes an external thread portion 15s on an outer peripheral surface thereof, which is screwed to an internal thread portion 14s provided on an inner peripheral surface of the lower end side of the piston 14, and the solenoid valve unit 1 is pressed against a step portion 14b provided on a bottom portion of the piston 14 by an upper end portion 15c of the cylindrical body 15. The stepped portion 14b is formed by a cylindrical inner peripheral surface 14c forming the accommodation recess 14A, a horizontal surface 14d as a receiving portion extending radially inward from an upper end of the inner peripheral surface 14c, and an inclined surface 14e tapering upward from an inner diameter side end edge of the horizontal surface 14d, and the solenoid valve unit 1 is sandwiched between the horizontal surface 14d and an upper end portion 15c of the cylindrical body 15.

Further, in the piston 14, a through hole 14f penetrating in the vertical direction is formed above the step portion 14b, specifically, the inclined surface 14e, and an electric wire LN for supplying electric power to the coil portion 2 described later is inserted through the through hole 14 f. Further, an electric line LN passes through the inside of the piston rod 12 and is connected to an external power supply.

Next, the structure of the solenoid valve unit 1 will be described. The solenoid valve unit 1 is mainly composed of a coil part 2, a solenoid rod 3 as a movable iron core that moves up and down by the coil part 2, a valve member 4 connected to a lower end portion of the solenoid rod 3, a cylindrical member 5 connected to a lower portion of the coil part 2, and an elastic member 7 attached to the coil part 2.

The coil portion 2 is a molded coil in which a coil is molded with a resin material, and has a hole portion 2a formed in the center thereof and opening downward. The coil part 2 has a shoulder 2b formed at an upper end side corner thereof, and an annular elastic member 7, which is an annular elastic member to be described later, is attached to the shoulder 2 b. In addition, specific shapes of the shoulder portion 2b and the elastic member 7 will be described in detail later. Further, a fixed core 2y is disposed below the coil portion 2.

The solenoid rod 3 has a male screw portion 3a formed at a distal end portion (i.e., a lower end portion), and most of the solenoid rod 3 is accommodated in the hole portion 2a of the coil portion 2.

The valve member 4 has a T-shaped cross section including a small diameter portion 4a and a large diameter portion 4b provided at the upper end of the small diameter portion 4a, and a hole portion 4d having an upward opening at the upper center portion and a female screw portion 4c on the inner peripheral surface is formed. The valve member 4 and the solenoid rod 3 are connected by screwing the female screw portion 4c and the male screw portion 3 a.

The cylindrical member 5 is fixed to a lower portion of the fixed core 2y, and includes a cylindrical portion 5a covering the valve member 4 and an annular valve seat portion 5b extending radially inward from a lower end of the cylindrical portion 5 a. The cylindrical member 5 may be formed integrally with the fixed core 2 y. The inner diameter of the valve seat portion 5b is formed larger than the diameter of the small diameter portion 4a of the valve member 4 and smaller than the diameter of the large diameter portion 4b of the valve member 4. Further, a plurality of through holes 5c penetrating in the radial direction are formed in the cylindrical portion 5a in the circumferential direction, and the through holes 5c are provided at substantially the same positions as the through holes 14a of the piston 14 in the axial direction (i.e., in the vertical direction) and communicate therewith. Further, a spring 6b that biases the valve member 4 in a direction of separating from the valve seat portion 5b is disposed between the large diameter portion 4b and the valve seat portion.

Next, the adjustment of the damping force by the solenoid valve unit 1 will be described. The solenoid valve unit 1 is formed with a flow path that communicates the first liquid chamber R1 with the second liquid chamber R2 via the through hole 14a of the piston 14, the through hole 5c of the cylindrical member 5, the opening portion on the lower end side of the cylindrical member 5 (i.e., the inside of the valve seat portion 5 b), and the cylindrical body 15.

When the coil unit 2 is not energized, the solenoid rod 3 is biased upward by the biasing force of the spring 6b, the large diameter portion 4b of the valve member 4 is separated from the valve seat portion 5b, and the gap between the large diameter portion 4b and the valve seat portion 5b becomes a dimension L1 (see the left side of the solenoid rod 3 in fig. 2). When the coil unit 2 is energized, the solenoid rod 3 moves downward against the biasing force of the spring 6b, the large diameter portion 4b of the valve member 4 approaches or abuts the valve seat portion 5b, and the gap between the large diameter portion 4b and the valve seat portion 5b has a dimension L2 (see the right side of the solenoid rod 3 in fig. 2) smaller than the dimension L1.

That is, the solenoid valve unit 1 can reduce the gap (i.e., the flow path) between the large diameter portion 4b and the valve seat portion 5b to increase the damping force of the damper 10 by setting the coil portion 2 in the energized state, and can reduce the damping force of the damper 10 by setting the coil portion 2 in the non-energized state to secure a large gap between the large diameter portion 4b and the valve seat portion 5 b.

Next, the elastic member 7 will be described. As shown in fig. 3 and 4, the elastic member 7 is an annular member made of rubber, synthetic resin, or the like, and includes an annular portion 7a having a vertically long rectangular shape in cross section as a deformable portion and an annular convex portion 7b protruding from the inner peripheral edge on the lower end side of the annular portion 7a in the inner diameter direction, and is L-shaped when viewed in cross section.

The shoulder 2b of the coil part 2 is shaped by cutting the upper end side corner of the coil part 2 in the circumferential direction, and has a stepped shape including a horizontal surface 2d horizontally extending from the outer peripheral surface 2c of the coil part 2 in the inner diameter direction and a vertical surface 2e rising upward from the inner diameter side end of the horizontal surface 2 d. An annular recess 2f recessed in the inner diameter direction is formed at the lower end of the vertical surface 2 e.

The elastic member 7 is attached to the shoulder 2b by fitting the annular portion 7a to the outside of the vertical surface 2e and inserting the convex portion 7b into the concave portion 2 f. In a state where the elastic member 7 is attached to the shoulder portion 2b, the lower surface 7c of the annular portion 7a is in contact with the horizontal surface 2d, and the upper surface 7d of the annular portion 7a is disposed above the upper surface 2g of the shoulder portion 2 b. That is, the vertical dimension of the annular portion 7a is formed larger than the vertical dimension of the vertical surface 2 e. The outer diameter of the vertical surface 2e of the shoulder 2b is slightly larger than the inner diameter of the annular portion 7a of the elastic member 7.

In this way, the elastic member 7 can be reliably attached to the shoulder portion 2b of the coil portion 2 by the fastening force in the inner diameter direction of the annular portion 7a (see black arrow of the enlarged portion in fig. 4) and the convex portion 7b inserted into the concave portion 2 f. Further, since the convex portion 7b is inserted into the annular concave portion 2f along the entire circumferential direction, the elastic member 7 is less likely to come off the coil portion 2, and the elastic member 7 can be attached to the shoulder portion 2b of the solenoid valve unit 1 with a substantially uniform holding force in the circumferential direction by the fastening force in the inner diameter direction of the annular portion 7 a. In particular, even if an external force acts on the elastic member 7 in the separating direction (i.e., upward direction) when the solenoid valve unit 1 is transported or transported, the convex portion 7b is inserted into the concave portion 2f and is hooked on the upper wall portion of the concave portion 2f, and therefore the elastic member 7 can be prevented from falling off the shoulder portion 2 b.

As shown in fig. 5, in a state where the solenoid valve unit 1 is accommodated in the accommodation recess 14A of the piston 14 and the cylindrical body 15 is screwed to the piston 14 (see fig. 2), the solenoid valve unit 1 is pushed up from below by the cylindrical body 15, and the annular portion 7a of the elastic member 7 is sandwiched between the horizontal surface 14d of the piston 14 and the horizontal surface 2d of the shoulder portion 2b in the vertical direction.

As described above, the convex portion 7b of the elastic member 7 is inserted and fixed into the concave portion 2f of the shoulder portion 2b, and on the other hand, when the solenoid valve unit 1 is pressed toward the horizontal surface 14d side of the accommodation concave portion 14A, the annular portion 7a is deformed in the axial direction, so that the solenoid valve unit 1 can be easily and accurately attached to the accommodation concave portion 14A with a sufficient repulsive force secured between the accommodation concave portion 14A and the solenoid valve unit 1.

Specifically, since the elastic member 7 is fixed by inserting the convex portion 7b into the concave portion 2f so as not to fall off the shoulder portion 2b, the function (i.e., the fastening force) of holding the annular portion 7a to the shoulder portion 2b is small, and the internal stress in the radial direction of the annular portion 7a can be reduced, so that the annular portion 7a can be accurately and sufficiently deformed in the axial direction, and a sufficient repulsive force can be secured between the accommodation concave portion 14A and the solenoid valve unit 1. Accordingly, even when the screw connection between the piston 14 and the tubular body 15 is loosened due to aging or the like, the solenoid valve unit 1 can be pressed against the tubular body 15 by the repulsive force of the annular portion 7a, and therefore, the solenoid valve unit 1 can be prevented from rattling in the accommodation recess 14A. Further, the annular portion 7a has a smaller repulsive force than a conventional wave washer or the like, and the force required to press the solenoid valve unit 1 toward the horizontal surface 14d side of the accommodation recess 14A is small, and high mounting accuracy is not required, so that the solenoid valve unit 1 can be easily mounted to the accommodation recess 14A. In addition, the annular portion 7a does not overlap the convex portion 7b in the axial direction, and therefore the internal stress of the convex portion 7b does not affect the deformation of the annular portion 7a in the axial direction.

Further, since the annular portion 7a is disposed along the vertical surface 2e of the shoulder portion 2b, when the solenoid valve unit 1 is inserted into the accommodation recess 14A, the shoulder portion 2b restricts twisting or the like of the annular portion 7a, and the annular portion 7a can be accurately pinched between the shoulder portion 2b and the horizontal surface 14 d.

Since the outer diameter of the annular portion 7a is smaller than the inner diameter of the housing recess 14A, a gap is formed between the annular portion 7a and the inner circumferential surface 14c of the housing recess 14A. Thus, when the solenoid valve unit 1 is inserted into the accommodation recess 14A, the annular portion 7a does not contact the inner peripheral surface 14c of the accommodation recess 14A, and therefore the solenoid valve unit 1 is easily inserted into the accommodation recess 14A.

Further, when the annular portion 7a is pinched by the horizontal surface 14d and the horizontal surface 2d, the annular portion 7a can be deformed in the outer diameter direction, and therefore a sufficient amount of deformation in the vertical direction of the annular portion 7a can be ensured. This can increase the repulsive force of the annular portion 7a in the vertical direction, and the horizontal surface 2d of the solenoid valve unit 1 and the horizontal surface 14d of the accommodation recess 14A are arranged close to each other, so that the vertical dimension of the shock absorber 10 can be made compact. In the present embodiment, the upper surface 7d of the annular portion 7a is at the same height as the upper surface 2g of the shoulder portion 2b in the state where the annular portion 7a is pinched.

In example 1, the protruding portion 7b is inserted, specifically, fitted into the recessed portion 2f with a gap, and the elastic member 7 and the shoulder portion 2b are fixed by the tightening force in the inner diameter direction of the annular portion 7a, but the protruding portion 7b may be press-fitted into the recessed portion 2 f. In this case, the annular portion 7a may be provided separately from the vertical surface 2e of the shoulder portion 2 b. That is, the elastic member 7 may be attached to the shoulder portion 2b without applying stress in the radial direction to the annular portion 7 a. The elastic member 7 may be attached to the shoulder portion 2b by a repulsive force of the convex portion 7b pressed into the concave portion 2f and a fastening force in the inner diameter direction of the additionally acting annular portion 7 a.

Example 2

Next, a solenoid valve unit according to embodiment 2 will be described with reference to fig. 6 to 8. In addition, the description of the structure overlapping with the above embodiment will be omitted.

As shown in fig. 6, in the elastic member 72 according to example 2, the convex portions 72b and 72b protruding in the inner radial direction from the annular portion 7a having a vertically long rectangular cross section are provided at positions facing each other with the central axis of the annular portion 7a interposed therebetween. The convex portion 72b has the same height as the annular portion 7 a.

As shown in fig. 7 and 8, the elastic member 72 is attached to the shoulder 22b of the coil part 2. Specifically, the shoulder portion 22b has a stepped shape including a horizontal surface 22d extending horizontally in the inner diameter direction from the outer peripheral surface 2c of the coil portion 2 and a vertical surface 22e rising upward from the inner diameter side end of the horizontal surface 22 d. Further, the vertical surface 22e is provided with recesses 22f, 22f recessed in the inner diameter direction at positions facing each other with the central axis therebetween. The recess 22f is formed by cutting so as to open upward and in the outer diameter direction. In fig. 7, the left side of the drawing shows a state of being cut at the position of the convex portion 72b, and the right side of the drawing shows a state of being cut at a position different from the position of the convex portion 72 b.

The convex portions 72b of the elastic member 72 are press-fitted into the concave portions 22f of the shoulder portion 22b, and the annular portion 7a is externally fitted to the vertical surface 22 e. Thus, the elastic member 72 can be reliably attached to the shoulder portion 22b of the coil portion 2 by a spring-back force in the circumferential direction of the convex portion 72b press-fitted into the concave portion 22f (see white arrows in the enlarged portion of fig. 8) and a tightening force in the inner diameter direction of the additionally acting annular portion 7a (see black arrows in the enlarged portion of fig. 8). In addition, the annular portion 7a does not overlap the convex portion 72b in the axial direction, and therefore the internal stress of the convex portion 72b does not affect the deformation of the annular portion 7a in the axial direction.

Further, since the convex portion 72b contacts the wall portion 22j in the circumferential direction of the concave portion 22f, the relative rotation of the elastic member 72 and the coil portion 2 can be restricted. Further, since the recess 22f is opened upward, the elastic member 72 can be attached to the shoulder 22b from above, and it is not necessary to arrange the elastic member 72 so as to expand the diameter, and the elastic member 72 can be easily attached.

In example 2, two convex portions 72b of the elastic member 72 and two concave portions 22f of the shoulder portion 22b are provided, but the number and size of the convex portions and the concave portions can be freely changed.

Example 3

Next, a solenoid valve unit according to embodiment 3 will be described with reference to fig. 9 and 10. In addition, the description of the structure overlapping with the above embodiment will be omitted.

As shown in fig. 9, in the elastic member 73 according to example 3, a convex portion 73b protruding downward from a radially central portion of a lower surface 7c of an annular portion 7a having a vertically long rectangular cross section is formed in an annular shape along the annular portion 7 a. That is, the annular portion 7a is formed to be wider than the convex portion 73b in the radial direction, and for convenience of explanation, as shown by the imaginary line of the chain line in fig. 10, from the outer diameter side to the inner diameter side, there are an outer diameter side deformed portion 71a which does not overlap the convex portion 73b in the axial direction, an intermediate portion 71c which overlaps the convex portion 73b in the axial direction, and an inner diameter side deformed portion 71b which does not overlap the convex portion 73b in the axial direction, respectively.

As shown in fig. 10, the elastic member 73 is attached to the shoulder 23b of the coil unit 2. Specifically, the shoulder portion 23b has a stepped shape including a horizontal surface 23d extending horizontally in the inner diameter direction from the outer peripheral surface 2c of the coil portion 2 and a vertical surface 23e rising upward from the inner diameter side end portion of the horizontal surface 23d, and an annular recess 23f is formed along the horizontal surface 23 d.

The convex portion 73b of the elastic member 73 is press-fitted into the concave portion 23f of the shoulder portion 23b, and the annular portion 7a is externally fitted to the vertical surface 23 e. Thus, the elastic member 73 can be reliably attached to the shoulder 23b of the coil part 2 by the repulsive force in the radial direction of the convex part 73b press-fitted into the concave part 23f (see white arrows in the enlarged part of fig. 10) and the tightening force in the inner radial direction of the additionally acting annular part 7a (see black arrows in the enlarged part of fig. 10). Further, since the convex portion 73b is attached in the same direction (vertical direction) as the annular portion 7a, it is not necessary to enlarge the diameter of the convex portion 73b, and the elastic member 73 can be easily attached to the shoulder portion 23 b. In addition, the outer diameter side deforming portion 71a and the inner diameter side deforming portion 71b do not overlap with the convex portion 73b in the axial direction, and therefore the internal stress of the convex portion 73b does not affect the deformation of the outer diameter side deforming portion 71a and the inner diameter side deforming portion 71b in the axial direction.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configurations are not limited to these embodiments, and modifications and additions may be made without departing from the spirit of the invention.

For example, in embodiments 1 to 3, the damper device 10 is described as an example of an object to which the solenoid valve unit is attached, but the solenoid valve unit may be attached to another control device as long as it is sandwiched between the accommodation recess and the connection member connected to the control device.

In examples 1 to 3, the cylindrical body 15 as the pressing member is screwed into the accommodation recess 14A, but may be fixed by caulking or the like. The connecting member can be freely changed according to the environment and field of use in which the solenoid valve unit is installed.

In examples 1 to 3, the upper surface of the deformable portion of the elastic member is flat in the circumferential direction, but the present invention is not limited thereto, and a protrusion may be provided on the upper surface of the deformable portion of the elastic member. Accordingly, when the deformation portion is axially sandwiched between the receiving portion of the accommodation recess and the shoulder portion of the solenoid valve unit, the sandwiching force is concentrated on the projection, and thus a large repulsive force in the axial direction can be ensured.

Description of the symbols

1: an electromagnetic valve unit; 2: a coil section; 2 b: a shoulder portion; 2 f: a recess; 3: a shaft member (movable iron core); 7: an elastic member; 7 a: an annular portion (deformation portion); 7 b: a convex portion; 10: a buffer device; 14A: an accommodation recess (accommodation portion); 14 d: a horizontal surface (receiving portion); 15: a cylindrical body (pressing member); 22 b: a shoulder portion; 22 f: a recess; 23 b: a shoulder portion; 23 d: a horizontal plane; 23 f: a recess; 72: an elastic member; 72 b: a convex portion; 73: an elastic member; 73 b: a convex portion; 700: an elastic member.