JPH09203472A - Spring holding mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of part items and reduce the cost of a spring holding mechanism by forming an enlarging part by enlarging one end part of a spring, and forming a housing part for holding and housing the enlarging part in a housing for locking one end of the spring. SOLUTION: In a spring 2 for energizing a plunger 1 toward an oil chamber S direction, the end part of an opposite side to the plunger 1 is enlarged in a taper shape 2a, and an enlarging part whose taper part maximum diameter is larger than the inner diameter part of the housing is formed. A spring housing part 5 which is slantly cut due to interfere with the taper part 2a of the spring 2 is formed on a position of an inside from the end part of the housing 3. The inner diameter D2 of the lower end of the housing 5 is formed as the same inner diameter as the inner diameter D1 of the housing 3, the taper shaped enlarging part of the spring 2 is held on the part. The spring 2 is fit to the housing part 5 while deforming the elasticity of the spring 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring holding mechanism in a reservoir for storing hydraulic oil used for hydraulic control such as anti-lock control or holding of springs provided in various valves such as ball valves. It is related to the mechanism.

[0002]

2. Description of the Related Art Conventionally, various antilock control devices have been developed as a braking device for performing a more effective and safe braking action on any road surface while an automobile is running. In these anti-lock control devices, the skid state of the wheels is evaluated by the control unit, and based on this evaluation, the brake fluid pressure supplied to the brake cylinders of the wheels is reduced, raised, or held constant. I try to do skid control.

In such an anti-lock control device, when the hydraulic pressure in the wheel cylinder is reduced in order to cancel the locked state of the wheels, the decay valve is opened and the brake hydraulic pressure in the wheel cylinder is once stored in the reservoir. A type is known in which the brake fluid in the reservoir is stored and then returned to the reservoir tank by a pump.

An example of a reservoir used in this type of antilock control device will be briefly described with reference to FIG.
The reservoir 10 includes a housing 13, a plunger 11 housed in the housing 13, and the plunger 1.
1 and a retainer 1 for holding the coil spring 12 in the housing 13.
4, the retainer 14 is housed in the groove 15 formed in the housing 13, and the retainer 14 can hold the end of the coil spring 12. In the reservoir 10, when the brake fluid pressure is reduced, the brake fluid in the brake cylinder is moved between the housing 13 and the plunger 11 while moving the plunger 11 against the urging force of the coil spring 12. By accumulating in the chamber S, the pressure reducing action of the brake fluid pressure is executed.

Now, the holding mechanism for the coil spring 12 in the reservoir having the above structure will be described in more detail. A groove 15 for holding the retainer 14 is formed on the inner peripheral surface of the housing. As shown in the drawing, the groove 15 has a depth shallower than the width A of the retainer 14, and when the retainer 14 is housed in the groove 15, a part B of the retainer 14 is projected from the groove 15. Therefore, the coil spring 12 is held by the above-mentioned retainer protruding portion when housed in the housing. The retainer 14 is C-shaped, and can be fitted into the groove 15 while bending the retainer 14. Another example of the coil spring holding mechanism is a ball valve as shown in FIG. In this case, the ball valve 21 is biased by the coil spring 22 toward the valve seat 24, and the coil spring 22 is held by the holder at the end of the housing.

[0006]

However, in the spring holding mechanism such as the reservoir and the ball valve described above,
A retainer and a holder are always required, and the number of parts increases accordingly, which is disadvantageous in terms of cost. Therefore, the present invention provides a spring holding mechanism capable of directly holding the spring in the housing without using a retainer, a holder, or the like, by processing the inner peripheral surface of the housing and changing the end shape of the spring. To do. According to the present invention, an inexpensive spring holding mechanism having a small number of parts can be obtained.

[0007]

Therefore, in the technical solution adopted by the present invention, one end of the spring 2 is enlarged to form an enlarged portion, and the enlarged portion is provided in the housing for locking one end of the spring. Forming a storage part 5 that can hold and store
A spring holding mechanism configured to store and hold the enlarged portion of the pulling in the storage portion 5, and to urge the valve member 21 facing the valve seat 24 and the valve member 21 toward the valve seat 24. A spring 22 and the spring 2
2, an end portion diameter on the side opposite to the valve member side is enlarged to form an enlarged portion, and a housing portion 25 for holding the valve member 21 is formed with a housing portion 25 capable of housing the enlarged portion. A spring holding mechanism configured to house and hold the enlarged portion of the spring in the housing portion 25.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view of a reservoir according to a first embodiment of the present invention, and FIG. 2 is a sectional view of a ball valve according to a second embodiment of the present invention.

In FIG. 1, reference numeral 10 is a reservoir, and the reservoir 10 includes a housing 3, a plunger 1 housed in the housing 3, and a spring 2 for pushing the plunger 1 to the left in the drawing. It consists of The plunger 1 is provided with a seal member 8 that seals the inner peripheral surface of the housing 3, and an oil chamber S is formed between the plunger 1 and the housing 3. The spring 2 for urging the plunger 1 in the direction of the oil chamber S has an end portion on the opposite side of the plunger 1 that expands to a tapered shape 2a, and the maximum diameter of the tapered portion is larger than the inner diameter portion of the housing 3. Are formed.

On the other hand, at a position slightly inside the end portion of the housing 3, a spring accommodating portion 5 is formed which is obliquely cut so as not to interfere with the tapered portion 2a of the spring 2. The inner diameter D2 of the lower end of the housing portion 5 is formed as the same inner diameter (D1 = D2) as the inner diameter D1 of the housing 3, and this portion can hold the tapered enlarged portion of the spring 2. There is. The spring 2 uses the elasticity of the spring 2 to deform,
It can be fitted in the storage part. As described above, in this example, the spring 2 can be held only by changing the end shape of the spring 2 and by forming the shape of the storage portion 5 formed on the housing 3 side to match the shape of the spring 2. In addition, a retainer as in the conventional case is not required, and the manufacturing cost of the reservoir can be reduced.

Next, the second embodiment will be described.
In FIG. 2, reference numeral 20 in the drawing is a ball valve, and this ball valve 20 is a valve seat 24 formed on the housing 23 side and a ball 21 capable of abutting the valve seat 24 and closing the flow path.
And a spring 22 for urging the ball 21 toward the valve seat 24. Ball 21 seat 24
The spring 22 urged in the direction expands in a tapered shape toward the opposite side of the ball, and the maximum diameter of the tapered portion is formed larger than the inner diameter portion of the housing 23.

On the other hand, on the housing 23 side, a large-diameter step portion (accommodation portion) 25 is formed so that the tapered spring 22 does not interfere with the inner wall of the housing 3. The height H of the large-diameter step portion 25 is set so that the tapered spring 22 does not interfere with the inner wall, and the inner diameter D2 at the lower end of the large-diameter portion is the same as the inner diameter D1 of the housing 23 (D1). = D2), and the enlarged portion of the spring 22 can be held at this portion. The spring 22 can be fitted into the large-diameter step portion 25 while deforming by utilizing the elasticity of the spring. As described above, in this example, the spring 22 is tapered, and the spring housing portion 25 having a large diameter step portion is formed on the housing side so that the spring and the inner wall of the housing do not interfere with each other. Such a holder can be dispensed with, and the manufacturing cost of the ball valve can be reduced. In the above embodiment, the reservoir and the ball valve have been described as an example.
Needless to say, the spring holding mechanism as described above can be used as a spring holding mechanism in various fields such as a pressure damping device and various valves.

[0013]

As described above, according to the present invention, by processing the inner peripheral surface of the housing and changing the end shape of the spring, the spring can be directly held in the housing without using a retainer or a holder. This eliminates the need for retainers and holders that were required for the spring holding mechanism in conventional reservoirs and ball valves, and the number of parts can be reduced and the product price can be reduced accordingly. It is possible to exert an effect.

[Brief description of drawings]

FIG. 1 is a side view of a reservoir according to a first embodiment.

FIG. 2 is a side view of a ball valve according to a second embodiment.

FIG. 3 is a side view of a conventional reservoir.

FIG. 4 is a side view of a conventional ball valve.

[Explanation of symbols]

 1 Plunger 2 Spring 3 Housing 5 Storage 21 Ball 22 Spring 23 Housing 24 Valve seat

Claims (5)

[Claims] 1. An enlarged portion is formed by enlarging one end portion of a spring 2, and a storage portion 5 capable of holding and storing the enlarged portion is formed in a housing that locks one end of the spring. A spring holding mechanism configured to store and hold the enlarged portion of the pulling. 2. A valve member 21 arranged to face a valve seat 24.
And a spring 22 for urging the valve member 21 toward the valve seat 24, the end diameter of the spring 22 on the side opposite to the valve member side is enlarged to form an enlarged portion, and a one-way valve is provided. A spring holding mechanism configured to form a storage portion 25 capable of storing the expanded portion in a housing that stores and holds the member 21, and to store and hold the expanded portion of the spring in the storage portion 25. 3. The spring holding mechanism according to claim 1, wherein the enlarged portion of the spring is formed such that a certain range of the spring is enlarged in a tapered shape. 4. The spring holding mechanism according to claim 1, wherein the spring has an enlarged portion formed in a shape in which the whole is enlarged in a tapered shape toward an end portion. . 5. The housing portion for housing and holding the enlarged portion of the spring is formed by a large-diameter portion having a diameter larger than the inner diameter of the housing, and the large-diameter portion has a height of the large-diameter portion and the inner-diameter portion. The spring holding mechanism according to any one of claims 1 to 4, wherein the stepped portion is set to have a height that does not interfere with the spring.