CN201439812U - Piston for automobile shock absorber - Google Patents

Abstract

The utility model relates to a piston for an automobile shock absorber, comprising a plurality of outer ring oil holes and a plurality of inner ring holes, wherein the inner ring holes are round holes, and the outer ring oil holes are approximately fan-shaped holes. The original eighteen outer ring oil holes are changed into a plurality of fan-shaped holes, so that the number of the outer ring oil holes can be reduced by enlarging the area of a single outer ring oil hole under the condition of ensuring the automobile shock absorber to generate proper damping force, and the strength of a mould is guaranteed since the distance between the two adjacent outer ring oil holes is large; furthermore, the outer ring oil holes also can be shaped by pressing with the mould without needing mechanical processing, so that the cost can be saved, and the safety of the products is enhanced.

Description

The automobile absorber piston

Technical field:

The utility model relates to a kind of auto parts and components, relates in particular to the automobile absorber piston.

Background technique:

Vehicle shock absorber is a kind of damping member, is the rapid wear accessory in the automobile using process, is one of important composition element of automobile suspension system, and smoothness, travelling comfort, Security, steering operation and the passing ability of vehicle driving played conclusive effect.Wherein piston is one of strength member in the vehicle shock absorber, and the generation of absorber damping force is had fundamental influence, and the oilhole on the piston to be damping force produce an indispensable part.

As Fig. 1, shown in Figure 2, in the prior art, the automobile absorber piston is to be formed by the mould compacting, it comprises outer ring oilhole 1, inner ring oilhole 2, cylinder barrel mating face 3, last valve face 4, following valve face 5, described outer ring oilhole 1 and inner ring oilhole 2 are manhole, be subjected to the restriction of piston self structure, the area of single outer ring oilhole 1 and single inner ring oilhole 2 is all very little, for producing suitable damping force, 18 outer ring oilholes 1 and six inner ring oilholes 2 generally need be set, and because the quantity of outer ring oilhole 1 is too many, spacing between two adjacent outer ring oilholes 1 is also just very little, and the mould strength that will cause making piston like this is not enough, if use 1 of mould compacting outer ring oilhole can cause the mould cracking, so outer ring oilhole 1 can only adopt the mode of machining to make, and inner ring oilhole 2 is because negligible amounts, and the distance between two adjacent oilholes is bigger, and the intensity of mould can be guaranteed, use the mould compacting can not cause the mould cracking, can be by mould compression moulding.But outer ring oilhole 1 adopts machining will produce than the defectives such as burr that are easier to come off, therefore must increase by one deburring operation again, like this, on the one hand, because the personal factor that machining exists is too many, the phenomenon of omission occurs through regular meeting, be difficult to also guarantee that product is all qualified even examine entirely, this causes stuck hidden danger for existing Yin Maoci to come off in the vibration damper using process; On the other hand, machining also makes the manufacturing procedure of product increase, and then has increased the fabricating cost of product.

The model utility content:

For solving above-mentioned technical problem, the utility model provides a kind of stable performance, automobile absorber piston that cost of production is low.

The technical solution of the utility model is, a kind of automobile absorber piston with following structure is provided, and comprises a plurality of outer rings oilhole and a plurality of inner ring oilhole, and described inner ring oilhole is circular hole, and described outer ring oilhole is roughly fan shaped borehole.

After adopting said structure, the utlity model has following advantage:

Make original 18 outer ring oilholes into several fan shaped borehole, guaranteeing that automobile absorber can produce under the situation of suitable damping force like this, the mode of the area by increasing single outer ring oilhole reduces the quantity of outer ring oilhole, spacing between two adjacent outer ring oilholes is bigger, the intensity of mould can be guaranteed, and the outer ring oilhole also can use mould compression moulding, need not carry out machining, save cost, increased security of products.

As improvement, described outer ring oilhole is six, and described inner ring oilhole also is six.

As further improvement, described fan shaped borehole and inner ring oilhole all evenly distribute along circumference.

Description of drawings:

Fig. 1 is the plan view of existing automobile absorber with piston;

Fig. 2 is the sectional view of A-A direction among Fig. 1;

Fig. 3 is the plan view of the utility model automobile absorber with piston;

Fig. 4 is the sectional view of B-B direction among Fig. 5

Shown in the figure 1, the outer ring oilhole; 2, inner ring oilhole; 3, cylinder barrel mating face; 4, go up valve face; 5, following valve face.

Embodiment:

The utility model is described in further detail below in conjunction with drawings and the specific embodiments.

As shown in Figure 3, Figure 4, the utility model automobile absorber piston, comprise six outer ring oilholes and six inner ring oilholes 2, described inner ring oilhole 2 is circular hole, described outer ring oilhole all is roughly fan shaped borehole 1, the described fan shaped borehole 1 that is roughly is meant that two long limits of outer ring oilhole are the arc limit, and minor face is a straight flange.Described fan shaped borehole 1 and inner ring oilhole 2 all evenly distribute along circumference.After the improvement, the area of single fan shaped borehole 1 can be set the needs of damping force size according to automobile absorber, it is bigger that the area of single fan shaped borehole 1 can be provided with, so just can reduce the quantity of outer ring oilhole, make the spacing between adjacent two fan shaped boreholes 1 bigger, the intensity of mould can be guaranteed, the outer ring oilhole also can be formed by the mould compacting, so the outer ring oilhole can use mould compression moulding, has reduced cost of production, has improved security of products.

Claims (3)

1. an automobile absorber piston comprises a plurality of outer rings oilhole and a plurality of inner ring oilhole (2), and described inner ring oilhole (2) is circular hole, it is characterized in that: described outer ring oilhole is roughly fan shaped borehole (1).

2. according to the described automobile absorber piston of claim 1, it is characterized in that: described fan shaped borehole (1) is six, and described inner ring oilhole (2) is six.

3. according to claim 1 or 2 described automobile absorber pistons, it is characterized in that: described fan shaped borehole (1) and inner ring oilhole (2) all evenly distribute along circumference.

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