CN2418302Y

CN2418302Y - Dust-proof washer of rear shock-damper closed-end of motorcycle

Info

Publication number: CN2418302Y
Application number: CN 00222561
Authority: CN
Inventors: 刘远兰; 张忠勇
Original assignee: Chuanan Shock Damper Co ltd Sichuan Prov
Current assignee: Chuanan Shock Damper Co ltd Sichuan Prov
Priority date: 2000-03-22
Filing date: 2000-03-22
Publication date: 2001-02-07
Anticipated expiration: 2010-03-22

Abstract

The utility model relates to a dustproof washer for sealing a rear shock damper of a motorcycle. A washer formed by the punch molding of steel plate is coated with a layer of vulcanized rubber. An inner bore of the washer is provided with a ladder-shaped rubber lug boss, and the inner bore of the washer, which is covered by rubber, is in interference fit with the top circle of a piston rod, so that silt can not attach to the piston rod in motion, and no silt is silted between the piston rod and an oil seal. The utility model does not change the original structure of a shock damper, and has the characteristics of simple structure, low manufacturing cost and easy installation; the sealing performance of the shock damper is improved commendably, and the service life of the shock damper is prolonged by more than three times.

Description

The dust washer that rear shock absorber of motorcycle seals

The utility model relates to the obturator of vibration damper in the mechanical engineering, the dust washer that particularly a kind of rear shock absorber of motorcycle seals.

At present, what the rear shock absorber of motorcycle sealing part adopted is plain washer, make between plain washer endoporus and the piston rod gapped like this, silt easily alluvial makes piston rod be in grinding state for a long time between oil seal lip and packing ring, causes that piston rod surface is pulled, corrosion, takes off chromium etc., the dustproof lip wearing and tearing of oil sealing, silt enters in the oil seal lip, and the major and minor lip of oil sealing is is sharply worn and torn, the damper leakage of oil.Chinese patent CN2287234Y discloses a kind of " lip sealing structure cushion rubber ", and it is at the identical or different sealing lip of sealing surfaces projection multiple tracks height of " O " shape, rectangle, shape cushion rubber such as trapezoidal, forms repeatedly sealing system of lip.

The purpose of this utility model provides the dust washer that a kind of rear shock absorber of motorcycle that can improve sealability seals.

The purpose of this utility model is solved by following technological scheme:

The dust washer that a kind of rear shock absorber of motorcycle seals by the steel plate impact briquetting, is characterized in that being coated with one deck vulcanized rubber on packing ring, the endoporus of packing ring is the rubber boss that is trapezoid shaped.

The utility model has the advantages that: changed the bead profile structure, making the packing ring endoporus and the piston rod cylindrical of encapsulate is interference fit, make piston rod at the volley, silt can be attached on the piston rod, can not enter oil seal, thereby protected the quality of piston rod surface and oil seal lip, reduced the oil spill rate of vibration damper, the working life of improving vibration damper is more than 2 times; Adopt the utility model not change the original structure of damping, the washer sealing performance is good behind the encapsulate, has characteristics simple in structure, wear-resisting, that cost is low, is the desirable update product that rear shock absorber of motorcycle seals packing ring.

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

Fig. 2 is user mode figure of the present utility model.

According to accompanying drawing the utility model is further described below:

The dust washer that rear shock absorber of motorcycle as shown in Figure 1 seals is formed by cold-rolling steel-plate punch, is coated with the rubber 4 that one deck is crossed through vulcanizing treatment on packing ring 2, and the endoporus of packing ring 2 is the rubber boss that is trapezoid shaped.Do not change the original structure of vibration damper, as shown in Figure 2, (former packing ring position) installs the dust washer 2 of encapsulate around piston rod 1, and the below of packing ring 2 is oil sealing 3.Its working principle is; dust washer 2 is an interference fit with the cylindrical of piston rod 1; the trapezoid shaped rubber boss and the piston rod of packing ring are fitted tightly; like this; piston rod 1 is in reciprocating process; silt can not can not enter in the oil sealing 3 attached on the piston rod 1, thereby has protected the quality of piston rod surface and oil seal lip.In endurance test, adopt oil sealing 3 and other parts of equal quality level, contrast assembling plain washer and dust washer on motorcycle, simulate the rugged environment test, through comparing, the assembly of plain washer is in short time (about 14 hours) seriously leakage of oil of inner oil seal, know after the dissection, shoal materials in the oil seal lip, main lip heavy wear, existing a small amount of silt in the damping tube, test trip section piston rod has serious corrosion, being between piston rod and oil sealing among the silt grinding, causing the lip wearing and tearing, is the main cause of damper oil impregnate; And the assembly of assembling dust washer is through with after the state test, and oil sealing, piston rod there is no unusually, have reached reduction vibration damper oil spill rate, the purpose in raising vibration damper working life.

Claims

The dust washer that a kind of rear shock absorber of motorcycle seals by the steel plate impact briquetting, is characterized in that being coated with one deck vulcanized rubber (4) on packing ring (2), the endoporus of packing ring is the rubber boss that is trapezoid shaped.