CN201339711Y

CN201339711Y - Piston ring fully-wrapping piston

Info

Publication number: CN201339711Y
Application number: CNU2008201687177U
Authority: CN
Inventors: 毛利剑
Original assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Current assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Priority date: 2008-12-01
Filing date: 2008-12-01
Publication date: 2009-11-04
Anticipated expiration: 2018-12-01

Abstract

The utility model relates to a piston ring fully-wrapping piston, which comprises a piston basal body and a piston ring. A strip annular groove is arranged outside the piston basal body. The piston ring the inner wall of which is matched with the groove is externally engaged with the piston basal body. The piston ring is of a fully-wrapping mode. The end part of one side of the piston ring is of a trumpet shape. The trumpet-shaped end part of the piston ring is in interference fit with the inner cavity of a shock absorber. The utility model has the advantages that: firstly, the utility model improves the tightness of the inner cavity of the shock absorber, is beneficial to improving the damping and prolonging service cycle of the shock absorber; secondly, the piston ring and the piston basal body are fixed into a whole body, thereby reducing the gap and relative movement between the piston ring and the piston basal body, improving practical working conditions of the shock absorber, prolonging the service life of the shock absorber and improving the wear resistance; and thirdly, the fully-wrapping piston reduces working procedures for manufacturing and assembling the shock absorber, reduces artificial operation error in the assembly process and is favorable for improving the quality.

Description

Piston ring full-enclosed piston

Technical field

The utility model relates to the vibration damper field, especially a kind of piston ring full-enclosed piston.

Background technique

The piston ring of conventional piston is that employing is split type, will assemble respectively when assembling.Complex procedures, because the manual operation factor makes that easily piston mass is not enough, piston ring and piston space degree of adaptability are low, cause poor sealing between piston and the vibration damper, wear no resistance when mounted.

Summary of the invention

The utility model will solve the shortcoming of above-mentioned prior art, provides a kind of assembling simple, the piston ring full-enclosed piston that sealing and wear resistance are good.

The technological scheme that its technical problem that solves the utility model adopts is: this piston ring full-enclosed piston, comprise piston matrix, piston ring, and the piston matrix has the bar annular ditch groove outward, the piston ring that the outer gearing of piston matrix has inwall and described groove to be complementary.

Piston is bad to be full-enclosed.Piston ring one side end is horn-like.The horn-like end of piston ring and vibration damper inner chamber interference fit.

The effect that the utility model is useful is: one, improve the sealing of vibration damper inner chamber, help the improvement of damping, prolong the life cycle of vibration damper; Two, piston ring and piston body are fixed as integral body, have reduced gap and relative movement between the two, and the actual operating conditions that these can improve vibration damper prolongs its working life, improve wear resistance; Three, the full-enclosed piston has reduced the operation in vibration damper manufacturing, the assembly process, has reduced artificial operate miss in the assembling, helps the improvement of quality.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural drawing of piston matrix in the utility model;

Description of reference numerals: piston matrix 1, groove 1-1, piston ring 2.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

With reference to accompanying drawing: this piston form adopts the piston matrix 1 of metallic sintered products, as shown in Figure 2, bar annular ditch groove 1-1 is arranged outside the piston matrix 1, also there is the corresponding projection with groove 1-1 the inside of piston ring 2, when making, piston ring 2 adopts full-enclosed and piston matrix 1 to mesh together, and has reduced relative movement when using between the two.Simultaneously piston ring 2 adopts horn-likely towards the end in piston matrix 1 front, and the diameter under the nature is bigger than vibration damper work intracavity diameter, and with the slight interference of inner chamber, combine closelyr with the vibration damper inner chamber, improved sealing.

In addition to the implementation, the utility model can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

Claims

1, a kind of piston ring full-enclosed piston comprises piston matrix (1) and piston ring (2), it is characterized in that: groove (1-1), the piston ring (2) that piston matrix (1) outer gearing has inwall and described groove to be complementary are arranged outside the piston matrix (1).

2, piston ring full-enclosed piston according to claim 1 is characterized in that: described piston ring (2) is a full-enclosed.

3, piston ring full-enclosed piston according to claim 1 is characterized in that: described piston ring (2) one side ends are horn-like.

4, piston ring full-enclosed piston according to claim 3 is characterized in that: the horn-like end of described piston ring (2) and vibration damper inner chamber interference fit.