CN102588494A

CN102588494A - Coating piston for vibration damper

Info

Publication number: CN102588494A
Application number: CN201210061304XA
Authority: CN
Inventors: 唐雪丽
Original assignee: Chengdu Jiuding Technology Group Co Ltd
Current assignee: Chengdu Jiuding Technology Group Co Ltd
Priority date: 2012-03-09
Filing date: 2012-03-09
Publication date: 2012-07-18

Abstract

The invention discloses a coating piston for a vibration damper, comprising a piston body and a piston ring. The piston ring is coated on the outer periphery surface of the piston body in a splicing manner so that the piston body and the piston ring form an integral structure; the left end of the piston ring is like a horn mouth; and a plurality of grooves are arranged on the piston body to ensure enough splicing force between the piston ring and the piston body. The coating piston is compact in structure, the processing precision of the piston is easily ensured, the sealing performance of the piston is increased, and the internal friction between the vibration damper cylinder and the piston can be effectively reduced and the abrasion of the piston is reduced in actual service, thereby the service life of the piston is prolonged.

Description

A kind of coated piston that is used for vibration damper

Technical field

The present invention relates to a kind of parts of vibration damper, especially a kind of coated piston that is used for vibration damper.

Background technique

At present; Its structure of traditional damper piston is as shown in Figure 1; Form with existing piston ring 12 by existing piston only 11; Be processed with groove 13 on the existing piston only 11, after processing existing piston only 11, the existing piston ring 12 that will process again is installed in the groove 13 of existing piston only 11.The piston that adopts this structure be by two independently the existing piston only 11 of part be assembled with existing piston ring 12; Because all there is machining error in existing piston only 11 inevitably with existing piston ring 12 in course of working; And in the assembly process of reality, be difficult to guarantee to have now the conformity of processing between piston only 11 and the existing piston ring 12, cause having bigger cumulative error through the piston of assembling.Excessive when the accumulated size of piston assembling, cause between piston and the vibration damper cylinder body cooperate tension the time, the internal friction when increasing vibration damper work aggravates wearing for piston; Oversize when the cumulative error of piston assembling, cause the matching gap between piston and the vibration damper cylinder body excessive, the sealing effect of vibration damper is bad.

The ideal movements state of damper piston be piston moving direction and vibration damper cylinder body axis on an axis; And common automobile-used McPherson suspension vibration damper in use, because vibration damper receives the effect of lateral force, is difficult to guarantee that it is on same axis; And the surface area of the existing piston ring 12 of conventional piston is less; Under the situation that lateral force increases severely, the oil film in eccentric wear district is blocked, and causes existing piston only 11 directly to contact with the vibration damper cylinder body; When the friction factor of this moment is in the oil film motion than existing piston ring more than 12 times even tens times greatly, make vibration damper occur the phenomenon of hardening, making sound in the course of the work simultaneously.

Summary of the invention

The technical problem that the present invention will solve provides a kind of compact structure, good sealing effect, and friction in effectively reducing between piston and the vibration damper cylinder body, the coated piston of long service life.

For solving the problems of the technologies described above, the present invention has adopted a kind of coated piston that is used for vibration damper, comprises piston only and piston ring, and said piston ring is coated on the external peripheral surface of piston only, and piston only and piston ring are monolithic construction.

One end of said piston ring is a bell mouth shape.

On the said piston only external peripheral surface a plurality of grooves are arranged.

Said back of ring has a plurality of annular boss, and the size and the quantity of groove are corresponding on the size of annular boss and quantity and the piston only, and the annular boss on the piston ring is just in time fallen in the groove on the piston only.

Be bonding the connection between said piston ring and the said piston only.

The beneficial effect that the present invention has:

1, piston only and piston ring adopt monolithic construction, have reduced the processing and the assembly error of piston only and piston ring, make total compact more, have improved both quality of fits.

2, the horn mouth of piston ring one end design can strengthen piston when work and the sealability between the vibration damper cylinder body, also plays to reduce function of friction between the two.

3, the annular boss of groove on the outside piston side face and back of ring design can effectively strengthen piston ring and piston bonding force, guarantees piston in movement process, and piston ring can not cause piston to lose efficacy the working life of having improved piston because of coming off.

Description of drawings

Fig. 1 is an existing technology structure of piston schematic representation;

Fig. 2 is a structural representation of the present invention;

Fig. 3 is the bell-mouthed partial schematic diagram of piston ring of the present invention.

Among the figure: 1, piston only; 2, piston ring; 3, the horn mouth of piston ring; 4, groove; 5, coated piston; 6, annular boss; 11, existing piston only; 12, existing piston ring; 13, groove.

Embodiment

As shown in Figure 2, be a kind of coated piston 5 that is used for vibration damper, comprise piston only 1 and piston ring 2, piston ring 2 is coated in piston only 1 outside, and piston only 1 is a monolithic construction with piston ring 2.This coated piston 5 is bonded in piston ring 2 on the outer peripheral surface of piston only 1 through first machining piston body 1 then, makes 2 one-tenth in piston only 1 and piston ring as a whole, has reduced the processing and the assembly error of part.5 machining accuracies that need to guarantee coated piston ring 2 on piston only 1 outer peripheral surface of whole coated piston just can effectively be controlled the quality of fit between coated piston 5 and the vibration damper cylinder body.

The material that the piston ring 2 of this coated piston 5 uses is teflon; And to more widen than existing piston ring 12; Increased the area of contact of piston ring 2, thereby reduced the internal friction between piston ring 2 and the vibration damper cylinder body effectively with the vibration damper cylinder body.In addition, because the steel in the existing technology of the friction factor between teflon and the steel is much little with friction factor between steel directly contacts, thereby further reduced the internal friction between piston ring 2 and the vibration damper cylinder body.

The coated formula design of these coated piston 5 whole employings adopts piston ring 2 to contact with the vibration damper cylinder body, can avoid piston only 1 to contact with the direct of vibration damper cylinder body, has eliminated traditional vibration damper and when receiving lateral forces, has produced the phenomenon of making sound, hardening.

As shown in Figure 3; This coated piston 5 is horn mouth 3 designs of piston ring 2 left ends than another key improvements of conventional piston; Adopt such structure that coated piston 5 is in when restoring stroke, to left movement, horn mouth 3 expands outwardly under the effect of pressure oil piston ring 2 along horn mouth 3 opening directions; Be adjacent to the cylinder body of vibration damper, thereby increased the sealability between coated piston 5 and the vibration damper cylinder body; When coated piston 5 is in compression stroke; Piston ring 2 moves right along horn mouth 3 openings in the other direction; This moment, horn mouth 3 inwardly shrank, and the clearance seal with minimum between piston ring 2 and the vibration damper cylinder body contacts, thereby has reduced wearing and tearing and the internal friction of piston ring 2 in compression stroke.

This coated piston 5 also is provided with a plurality of grooves 4 on the outer peripheral surface of piston only 1, can increase the bonding force between piston ring 2 and the piston only 1 like this; For further improving the bonding force between piston ring 2 and the piston only 1; Can also on piston ring 2 internal surfaces, process a plurality of annular boss 6; The quantity of groove 4 is with big or small corresponding on the quantity of annular boss 6 and size and the piston only 1; Annular boss 6 on the piston ring 2 is just in time fallen in the groove 4 on the piston only 1, further increase the bond area between piston ring 2 and the piston only 1, strengthen the bonding force between piston ring 2 and the piston only 1; Make coated piston 5 in long-term to-and-fro motion at a high speed, be not easy to come off and cause losing efficacy, and then increased the working life of coated piston 5.

Claims

1. coated piston (5) that is used for vibration damper; Comprise piston only (1) and piston ring (2); It is characterized in that: said piston ring (2) is coated on the outer peripheral surface of piston only (1), and piston only (1) is a monolithic construction with piston ring (2).

2. coated piston as claimed in claim 1 (5) is characterized in that: the left end of said piston ring (2) is horn mouth (a 3) shape.

3. according to claim 1 or claim 2 coated piston (5) is characterized in that: on said piston only (1) outer peripheral surface a plurality of grooves (4) are arranged.

4. coated piston as claimed in claim 3 (5); It is characterized in that: said piston ring (2) internal surface has a plurality of annular boss (6); The size of said annular boss (6) is corresponding with size and quantity that quantity and said piston only (1) are gone up groove (4), and the annular boss (6) on the piston ring (2) is just in time fallen in the groove (4) on the piston only (1).

5. coated piston as claimed in claim 3 (5) is characterized in that: be bonding the connection between said piston ring (2) and the said piston only (1).

6. coated piston as claimed in claim 4 (5) is characterized in that: be bonding company between said piston ring (2) and the said piston only (1).