CN205298559U - Reciprocating motion oil blanket - Google Patents

Abstract

The utility model relates to a reciprocating motion oil blanket, include support chassis, the static seal body, the movive seal body and hold the spring tightly, support chassis is circularly, inboard and the movive seal body coupling of support chassis, support chassis's lower extreme and external diameter position and static seal body coupling, both ends are all installed and are held the spring tightly about the outside of the movive seal body, the movive seal body is including at least one dust lip, the dust lip front end is equipped with circular arc R, circular arc R radius is less than 0.4mm, the axial distance L who holds the centre of a circle to the circular arc R mid point of spring tightly is less than 1mm. The utility model discloses a dust lip structure design the dust lip power value assignment relation of reciprocal oil blanket, the effect of resistant eccentric and yawing force of counterpoise spring can be exert again to sealed effect that both can effectual performance rubber elasticity physical contact, can effectual muddy water, the dust that prevents the external world enter into oil blanket and absorbing inside, the defective shock absorber avoided.

Description

A kind of reciprocating motion oil seal

Technical field

This utility model relates to a kind of oil sealing, particularly relates to a kind of reciprocating motion oil seal structure, belongs to oil seal technique field.

Background technology

At present, along with automobile, the popularization and application of the vehicles such as motorcycle, amortisseur is increasingly paid attention to as the key components and parts affecting its riding comfort, wherein, oil seal for shock damper is as the critical component of amortisseur, serviceability and life-span to amortisseur play vital effect, in the sealing lip of reciprocating oil seal, dust excluder lips plays the dust preventing the external world, muddy water enters into the effect within amortisseur, along with automobile, the road conditions that motorcycle uses become increasingly complex, because of dust on market, muddy water enters into and causes inside amortisseur that the ratio of defective shock absorber is increasing, sampling statistics is more than 50%.

The dustproof lip structure design of present oil seal for shock damper application mainly has two kinds of classification:

1) according to dust excluder lips, dust-proof spring with redeeming is classified;

2) according to the magnitude classification of dust-proof lip circular arc R value, general provision R >=0.5, it is called orthodrome structure, R < 0.5, is called small arc-shaped structure.

Wherein, currently used effect preferably little R arc structure with spring, but by market and experimental verification, its muddy water ability dust-proof, anti-still can not meet Vehicles Collected from Market requirement.

So, how can effectively solve the problem that the problem that dust prevention of vibration absorber lost efficacy, become a key issue urgently to be resolved hurrily of current automotive industry. But the property being designed without breaking through due to oil sealing dustproof construction is improved, in the field of business upper but without appearance a kind of passable solution dust prevention of vibration absorber, anti-muddy water effective scheme so far.

Utility model content

The deficiency that this utility model exists for oil seal for shock damper, it is provided that a kind of reciprocating motion oil seal.

The technical scheme that this utility model solves above-mentioned technical problem is as follows:

A kind of reciprocating motion oil seal, including support frame, static seal body, movable sealing body with hold spring tightly, described support frame is rounded, it is connected with movable sealing body inside described support frame, lower end and the external diameter position of described support frame are connected with static seal body, the upper and lower two ends, outside of described movable sealing body are mounted on holding spring tightly, described movable sealing body includes at least one dust excluder lips, it is characterized in that, described dust excluder lips front end is provided with circular arc R, the radius of described circular arc R less than 0.4mm, described in hold the axial distance L at the center of circle to circular arc R midpoint of spring tightly less than 1mm.

The beneficial effects of the utility model are:

1) the dust excluder lips force value relations of distribution of reciprocating oil seal are designed by the dustproof lip structure that this utility model adopts, the sealing force of holding tightly of dust excluder lips is provided jointly by rubber bodies and spring, and it is 20%��40% that spring force value accounts for the ratio of the total enclasping force of dust excluder lips, both the sealing effectiveness of rubber elastomer contact can effectively have been played, the effect of the resistance to bias of counterbalance spring and side force can be played again, can effectively stop the muddy water in the external world, dust to enter into the inside of oil sealing and damping, it is to avoid defective shock absorber.

2) contrast with the design of present reciprocating oil seal dust excluder lips, combining on the basis of advantage of existing scheme, key design parameter is optimized design, improves the dirt exclusion capabilities of reciprocating oil seal.

On the basis of technique scheme, this utility model can also do following improvement.

Further, described dirt lip is provided with some axial anti-attrition stricture of vaginas.

Adopt above-mentioned further scheme to provide the benefit that, it is possible to increase the wearability of oil seal lip, reduce the frictional force at oil seal lip position, improve the dust-proof effect of dust excluder lips.

Further, described dust excluder lips is made up of rubber bodies, described in hold spring tightly and be made of metal.

Further, described circular arc R radius is 0.2mm, described in hold spring tightly the axial distance L at the center of circle to circular arc R midpoint be 0.7mm.

Accompanying drawing explanation

Fig. 1 is oil enveloping structure sectional view of the present utility model;

Fig. 2 is aminoacyl site enlarged drawing in Fig. 1;

Fig. 3 is anti-attrition stricture of vagina position view;

In Fig. 1-3,1, support frame; 2, movable sealing body; 3, spring is held tightly; 4, static seal body; 5, dust excluder lips; 6, anti-attrition stricture of vagina;

Detailed description of the invention

Below in conjunction with example, principle of the present utility model and feature being described, example is served only for explaining this utility model, is not intended to limit scope of the present utility model.

A kind of reciprocating motion oil seal, including support frame 1, static seal body 4, movable sealing body 2 and hold spring 3 tightly, described support frame 1 is rounded, it is connected with movable sealing body 2 inside described support frame 1, lower end and the external diameter position of described support frame 1 are connected with static seal body 4, the upper and lower two ends, outside of described movable sealing body 2 are mounted on holding spring 3 tightly, 2 one dust excluder lips 5 of described movable sealing body, it is characterized in that, described dust excluder lips 5 front end is provided with circular arc R, described circular arc R radius is 0.2mm, the axial distance L at the described center of circle to the circular arc R midpoint holding spring 3 tightly is 0.7mm, described dust excluder lips 5 is provided with some axial anti-attrition stricture of vaginas 6.

The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all within spirit of the present utility model and principle, any amendment of making, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.

Claims (4)

1. a reciprocating motion oil seal, including support frame, static seal body, movable sealing body with hold spring tightly, described support frame is rounded, it is connected with movable sealing body inside described support frame, lower end and the external diameter position of described support frame are connected with static seal body, the upper and lower two ends, outside of described movable sealing body are mounted on holding spring tightly, described movable sealing body includes at least one dust excluder lips, it is characterized in that, described dust excluder lips front end is provided with circular arc R, the radius of described circular arc R less than 0.4mm, described in hold the axial distance L at the center of circle to circular arc R midpoint of spring tightly less than 1mm.

2. a kind of reciprocating motion oil seal according to claim 1, it is characterised in that described dirt lip is provided with axial anti-attrition stricture of vagina.

3. a kind of reciprocating motion oil seal according to claim 1 and 2, it is characterised in that described dust excluder lips is made up of rubber bodies, described in hold spring tightly and be made of metal.

4. a kind of reciprocating motion oil seal according to claim 1 and 2, it is characterised in that described circular arc R radius is 0.2mm, described in hold spring tightly the axial distance L at the center of circle to circular arc R midpoint be 0.7mm.