JP2597699Y2 - Oil reservoir tank filter fixing structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil reservoir tank for an automobile power steering. More specifically, the present invention relates to a structure for fixing an oil filter provided in the oil reservoir tank.

2. Description of the Related Art At present, a hydraulic power steering system having excellent controllability and responsiveness is used for power steering of an automobile. In general, a hydraulic power steering device includes a control valve 2, a power cylinder 3, and accessories as shown in a hydraulic circuit diagram of FIG. 4 and a mounting diagram of FIG. The accessory equipment includes an oil pump 5, a flow control valve 6, a pressure control valve 7, an oil reservoir tank 8, and the like.

There are various types of hydraulic power steering devices, such as a linkage type, an integral type, and a semi-integral type. All of them are oil reservoirs for storing oil for driving a power cylinder. A tank is required. The present invention relates to this oil reservoir tank.

[0004]

2. Description of the Related Art FIGS. 6A and 6B are views showing a conventional oil reservoir tank made of a resin for a hydraulic power steering device, wherein FIG. 6A is an exploded perspective view and FIG. This consists of a cover 10 constituting the upper part of the tank and a filter or baffler 11 for removing dirt from the oil.
And a reservoir 12 constituting the lower part of the tank.
Then, assembling, the filter or baffle 11 is placed on the stepped portion 13 of the reservoir 12, the periphery thereof is welded by ultrasonic welding, and then the upper flange portion 14 of the reservoir 12 is welded.
And the flange portion 15 of the cover 10 is overlapped and adhered by a vibration welding method.

[0005]

In the oil reservoir tank formed by the above-mentioned conventional method, the conditions for ultrasonically welding the filter or the baffler 11 to the reservoir 12 are difficult, and the welding surface is not visible from the outside. The strength cannot be confirmed. The filter or baffle 11 must be welded to the reservoir 12 over its entire circumference. However, the filter or buffer 11 may be deformed during molding or may be deformed due to a temperature change after molding. In some cases, some parts may not be welded due to the cause.

If the welding strength is insufficient due to the deformation of the filter or the baffler 11 or the inclination of the welding jig, the filter or the baffler 11 may come off from the reservoir 12 during use. In addition, the filter does not function as a filter or a baffler, does not collect dust in the oil, and causes a problem that the oil does not circulate due to the dust.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention provides a filter fixing structure for an oil reservoir tank, which can securely fix a filter or a baffler to a reservoir without using an ultrasonic welding method. And

[0008]

In the filter fixing structure of the oil reservoir tank according to the present invention, a reservoir 12 having a cylindrical shape with a bottom and a stepped portion 13 in the middle of the inner peripheral wall is provided.
When the a filter or Baffura 11 having a plate-like peripheral portion 16 which is fixed to the stepped portion 13, the reservoir 12 and a cover 10 which is joined by welding to the upper opening <br/> made made of resin In the oil reservoir tank, the cover 10 is provided with a plurality of projections 17 having a length capable of pressing the filter 16 mounted on the stepped portion 13 of the reservoir 12 or the peripheral portion 16 of the baffle 11. The cover 10 is joined to the reservoir 12 in a state in which a filter or a baffler 11 is accommodated in the reservoir.

In addition, a resin 19 for absorbing vibration is interposed between the tip of the projection 17 of the cover 10 and the filter or baffle 11.

[0010] By adopting this configuration, a filter fixing structure of the oil reservoir tank can be obtained which can securely fix the filter or the baffler to the reservoir without using the ultrasonic welding method.

[0011]

According to the present invention, when the cover 10 is joined to the reservoir 12, as shown in FIG.
By providing a projection 17 that can press the peripheral portion of the filter or baffler 11 placed on the
0 is welded to the reservoir 12 by vibration welding.
The projection 17 presses and welds the filter or the baffler 11 to fix it to the stepped portion 13 of the reservoir 12.

Further, as shown in FIG. 2, by providing a temporary fixing projection 18 on the inner surface of the peripheral wall of the reservoir 12, the filter or the baffler 11 mounted on the stepped portion 13 is temporarily fixed, and the subsequent cover welding operation is performed. Can be easily handled.

Also, as shown in FIG.
And a filter 19 that absorbs vibration between the filter and the baffler 11 placed on the stepped portion 13 of the reservoir 12.
When the cover 10 is vibration-welded to the reservoir 12, the tip of the projection 17 does not weld to the filter or the baffler 11 because the resin 19 absorbs vibration. Therefore, the welding energy can be reduced as compared with the case where the resin 19 is not provided.

[0014]

1 is a view showing a first embodiment of the present invention, wherein (a) is an exploded sectional view and (b) is an assembled sectional view. This embodiment comprises a cover 10, a filter (or baffler) 11, and a reservoir 12, each made of plastic, as shown in FIG. The reservoir 12 has a cylindrical shape with a bottom and a stepped portion 13 is formed at an intermediate portion of the peripheral wall, and a flange 14 for joining to the cover 10 is provided at an upper opening.

The filter 11 has a plate-shaped peripheral portion 16.
, And a knitting is supported on the peripheral portion. The cover 10 has a cap-like shape, and has a lower opening formed with a flange 15 for joining to the reservoir 12 and, when joined to the reservoir 12, placed on the stepped portion 13 of the reservoir 12. A plurality of projections 17 capable of pressing the plate-shaped peripheral portion 16 of the filter 11 are provided. The projections 17 have a vertical rib shape in the figure, but may have a ring shape.

These members are assembled as shown in FIG. That is, the filter 11 is placed on the stepped portion 13 of the reservoir 12, the flange 15 of the cover 10 is overlapped with the flange 14 of the reservoir 12 in this state, and vibration welding is performed in that state. At this time, the tip of the projection 17 is also welded to the peripheral portion 16 of the filter 11. Therefore A,
Welding is performed at B2.

According to the above embodiment, the filter 17 is formed by the projections 17 simultaneously with the welding of the reservoir 12 and the cover 10.
Since 1 can be pressed and fixed to the stepped portion 13 of the reservoir, the conventional ultrasonic welding is not required, so that the cost can be reduced and the filter can be securely fixed.

FIGS. 2A and 2B are views showing a main part of a second embodiment of the present invention, wherein FIG. 2A is a sectional view of a reservoir, and FIG. 2B is a sectional view showing a state where a filter is temporarily fixed to the reservoir. . This embodiment is basically the same as the previous embodiment, except that when the filter 11 is mounted on the stepped portion 13 of the reservoir 12 as shown in FIG. That is, a temporary fixing projection 18 is provided on the inner surface of the peripheral wall of the reservoir 12 so as to be temporarily fixed.

According to this embodiment, the filter 11 can be temporarily fixed to the reservoir 12 at the time of assembly, as shown in FIG. Is free and assembly is easy.

FIGS. 3A and 3B are views showing a third embodiment of the present invention, wherein FIG. 3A is a sectional view of a cover, and FIG. 3B is an assembled sectional view.
This embodiment is also basically the same as the first embodiment, and differs from the first embodiment only in that the projections 1 of the cover 10 as shown in FIG.
7 is coated with a material that absorbs vibration, for example, a urethane-based or elastomer-based resin 19 to a certain thickness (thickness capable of absorbing vibration during vibration welding).

The cover 10 in which the projections 17 are covered with the resin 19 as described above is attached to the flange 14 of the reservoir 12 in which the filter 11 is mounted on the stepped portion 13 as shown in FIG.
At this time, the flange 14 of the reservoir 12 and the flange 15 of the cover 10 are welded at the portion A, but the tip of the projection 17 of the cover 10 and the filter 11 are made of resin. Although they are in contact with each other at the portion B via 19, the resin 19 absorbs the vibration and does not weld together. Therefore, the welding energy is smaller than in the first embodiment.

According to this embodiment, as in the first embodiment, the ultrasonic welding operation of the reservoir 12 and the filter 11 becomes unnecessary, and the filter 11 can be securely fixed to the reservoir 12, and the vibration can be achieved. Since the energy at the time of welding is smaller than that of the first embodiment, welding can be performed even when the capacity of the vibration welding machine is small.

In each of the embodiments described above, only the fixing of the filter has been described. However, it goes without saying that the present invention can also be applied to a baffler having a peripheral portion having a similar shape.

[0024]

According to the present invention, according to the present invention, in a resin oil reservoir tank comprising a reservoir, a filter or a baffler, and a cover, a projection capable of holding down a filter or a baffler placed on a step portion of a reservoir is covered. And a cover is welded to the reservoir by vibration welding, so that the projections can press and fix the filter or the baffler to the stepped portion of the reservoir.
As a result, the conventional ultrasonic welding becomes unnecessary, the cost can be reduced, and there is no poor welding at the time of the ultrasonic welding, and the quality can be improved.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of the present invention, wherein (a) is an exploded sectional view and (b) is an assembled sectional view.

FIG. 2 is a view showing a main part of a second embodiment of the present invention, wherein (a)
FIG. 2 is a cross-sectional view showing a reservoir, and FIG. 2B is a cross-sectional view showing a state where a filter is temporarily fixed to the reservoir.

FIGS. 3A and 3B are views showing a third embodiment of the present invention, wherein FIG. 3A is a sectional view showing a cover, and FIG.

FIG. 4 is a hydraulic circuit diagram of a conventional hydraulic power steering device.

FIG. 5 is a mounting diagram of an example of a conventional hydraulic power steering device.

6A and 6B are views showing a conventional oil reservoir tank made of resin for power steering, in which FIG. 6A is an exploded perspective view, and FIG. 6B is an exploded sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Cover 11 ... Filter (or baffler) 12 ... Reservoir 13 ... Stepped part 14, 15 ... Flange 16 ... Flat peripheral part 17 ... Projection 18 ... Temporary fixing projection 19 ... Vibration absorption resin

Claims (2)

(57) [Scope of request for utility model registration] A reservoir (12) having a cylindrical shape with a bottom and having a stepped portion (13) in the middle of the inside of the peripheral wall;
Plate peripheral portion fixed to 3) and filter or Baffura (11) with (16), comprising a cover (10) for joining by welding to the upper opening of the reservoir (12)
In the resin-made oil reservoir tank comprising Te, said cover (10), the filter was placed on the stepped portion of the reservoir (12) (13) or Baffura (11)
A plurality of protrusions (17) having a length capable of pressing the peripheral portion (16) of the reservoir (12), and the reservoir (12) containing the filter or the baffler (11) in the reservoir (12). And a cover (10) joined to the filter reservoir of the oil reservoir tank. 2. The tip of a projection (17) of said cover (10).
Vibration between the end and the filter or baffler (11)
2. A filter fixing structure for an oil reservoir tank according to claim 1, wherein an absorbing resin (19) is interposed .