JPH0110303Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a check valve device for a filter in an oil reservoir of a vehicle.

The above-mentioned conventional check valve body was made of pressed iron plate material, like the reservoir body. As a result, variations occur in the machining and assembly fitting gaps between the two,
In addition, since a band bracket or the like is used to attach the body to the vehicle body, etc., the body may be tightened and deformed, resulting in a decrease in the sealing performance of the valve or its operation due to deviation in the size of the gap. There was a defect that caused the valve to become unsmooth and interfere with valve function.

In the present invention, a sealing member made of an elastic material is used in conjunction with the check valve to prevent the occurrence of the above-mentioned defects.

Embodiments of the present invention will be described below based on the accompanying drawings.

Reference numeral 1 denotes a body made of iron plate, and includes an oil inlet 2 from a power steering (not shown) and an oil outlet 3 to a pump. Reference numeral 4 denotes a cover, and the cover 4 is fixed to the body 1 by pressure bonding with a sealing member 5 interposed on the body 1 by bending an appropriate number of claw portions 4a provided at equal intervals around the circumference. A cap 6 is removably attached to the cover 4 in a sealed manner by means not shown.

The chamber 7 surrounded by the body 1, cover 4 and cap 6 houses a check valve device having the following configuration.

That is, a cylindrical filter 9 is supported by a circular filter seal member 8 disposed at the bottom of the body 1, and a hollow circular seal 10 is mounted on the filter 9.
is placed. As shown in the figure, the seal 10 is formed into a lip shape 10a that slopes downward and becomes thinner, and the lip 10a is elastically fitted into the inner wall of the body 1. inserted.

Reference numeral 11 denotes an iron plate having a circular hole in the center, which is engaged in the recess of the seal 10, and serves to prevent the lip base of the seal 10 from warping due to hydraulic pressure and to support the spring pressure of the spring described later.

A coil spring 12 is stretched between the cover 4 and the plate 11, and urges the seal 10 downward with its set spring pressure.

Although not shown in the drawings, an oil strainer having approximately the same length as the spring is fixed to the cover 4 and hangs down inside the coil spring 12.

The check valve device of the present invention is constructed as described above, and its operation and effects will be described below.

When oil flows into the chamber 7 of the reservoir through the inlet 2, the oil is filtered from the chamber 7a through the filter 9 and enters the chamber. long-term operation,
If the filter 9 becomes clogged due to accumulation of impurities etc. due to other causes, the oil pressure in the section 7a will increase and the seal 10 will be increased by the spring pressure depending on the degree of clogging.
2, creating an oil flow path gap with the filter 9 and imposing a function as a safety valve for the return circuit of the power steering.

In the previous type, the seal 10 was made of the same iron plate material as the body 1, as described above, but in the present invention, it is made of an elastic material, and the outer periphery that fits into the body chamber is formed into a lip shape. If the inner diameter of the body 1 is incorrect, or if it is attached to the vehicle body using a band bracket,
Even if the body 1 is deformed, the deviation in the inner diameter dimension and the body deformation are absorbed by the flexible elastic deformation of the lip part 10, and the lip part 10a contacts the body 1 with a stable and predetermined contact pressure, thus preventing leakage. Moreover, smooth valve operation is achieved.

[Brief explanation of the drawing]

The figure shows a central section through an oil reservoir with the device according to the invention. DESCRIPTION OF SYMBOLS 1... Body, 4... Cover, 5... Seal member, 6... Cap, 7... Chamber, 8... Filter seal, 9... Filter, 10... Seal, 11
...Plate, 12...Coil spring.

Claims (1)

[Scope of utility model registration request] A cover having a cap fixed to a body having an oil inlet/outlet through a sealing member, and a thin lip with an inclined outer circumferential edge facing downward on a filter disposed below the chamber formed by the body, cover, and cap. A seal made of an elastic material having a shape and a plate engaged with the seal are disposed, a lip portion of the seal is elastically fitted into the chamber, and a spring is tensioned between the plate and the cover. A check valve device for an oil reservoir filter.