CN2727505Y

CN2727505Y - Built up thin piston

Info

Publication number: CN2727505Y
Application number: CN 200420052661
Authority: CN
Inventors: 辛学慧
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-03
Filing date: 2004-08-03
Publication date: 2005-09-21
Anticipated expiration: 2014-08-03

Abstract

The utility model discloses a built up thin piston used for air cylinder. The built up thin piston comprises a piston disc punching formed by two metallic plates of the same structure, and a supporting baffle ring clamped between the two metallic plates. The supporting baffle ring is filled with wear resistant filler. The built up piston structure is light and thin, and has good gas sealing performance. The utility model which solves the technical problem of the existing piston which has the disadvantages of complex production, large volume, poor gas sealing performance, big material consumption, and high cost, is especially adapted to the cylinders of middle and large cylinder diameters.

Description

Combined type approaches piston

Affiliated technical field

The utility model relates to the matched piston of a kind of cylinder.

Background technique

At present, the piston that cylinder production is used is mostly made through machining by metal blank, and this kind piston is made complicated, and volume is big, makes cylinder axis long to installation dimension, high material consumption, cost height.

Summary of the invention

In order to overcome the shortcoming of above-mentioned existence, the purpose of this utility model provides a kind of in light weight, and processing technology is simple, and consumptive material is few, good airproof performance, the thin piston of the combined type that cost is low.

Main technical schemes of the present utility model is: this kind combined type approaches piston, it is fixed on the piston rod by the combination of center hole location, seal groove is combined to form between piston and the cylinder inner wall, it is characterized in that described piston is by the piston plate of two sheet metal drawings and be clamped in that support baffle ring in the middle of the two-piston dish forms, between support baffle ring and both sides piston plate, respectively form a seal groove, two way sealed circle or one-way sealing circle all are housed in each seal groove; On the mating face of supporting baffle ring and cylinder inner wall, be provided with the groove of filling wear resistant filler, have location retaining platform at two-piston dish junction point.

For improving the piston rigidity, be arranged with the reinforcement convex tendon of drawing on the described piston plate.

Described support ring is made of plastics.The material of the metal that also available other friction factor are lower.

Owing in each seal groove the two way sealed circle is housed all, the change known technology is worn and torn by one way pressure only in the time of will being subjected to the wearing and tearing of round trip pressure into each two way sealed circle work when only using a two way sealed circle job, improved the cylinder seal life-span.

The beneficial effects of the utility model are: the more original piston volume of being made through machining by metal blank of the thin piston of this kind combined type is little, in light weight, processing technology is simple, consumptive material is few, cost is low, tightness is good, also shortened axial dimension, for axial installation dimension provides the adjusting space; In piston in combination, use a two way sealed circle to change two two way sealed circles that are equipped with into, can improve the cylinder seal spare life-span by known.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a main sectional view of the present utility model;

Fig. 2 is the mounting point figure of the utility model in the cylinder combination.

Among the figure: 4 piston plates, 5 support rings, 15 stiffening ribs, 16 seal grooves, the groove of 17 filling high-abrasive materials, 18 two way sealed circles, 20 location retaining platforms.

Embodiment

As shown in Figure 1.This kind combined type approaches piston, it comprise two structures identical by the rammed piston plate 4 of metal foil, in the middle of two piston plates 4 the support baffle ring of being made by the lower plastics of friction factor 5 is installed, support groove 17 and location retaining platform 20 that baffle ring 5 is provided with the filling wear resistant filler, by in two seal grooves 16 that are combined to form a two way sealed circle 18 being housed respectively.Two way sealed circle 18 is to adopt the cross section to be 8 font COP seal rings, has punching press on two piston plates 4 and forms reinforcement convex tendon 15.

As Fig. 2 is the mounting point figure of the utility model in the cylinder combination.Piston in combination is fixed on the piston rod 1, and the bonnet inboard is provided with regulates seat cushion 6.

Claims

1, the thin piston of a kind of combined type, it is fixed on the piston rod by the combination of center hole location, it is characterized in that described piston is made up of the piston plate (4) of two sheet metal drawings and the support baffle ring (5) that is clamped in the middle of the two-piston dish (4), between support baffle ring and both sides piston plate, respectively form a seal groove (16).

2, the thin piston of combined type according to claim 1 is characterized in that described piston plate is provided with the reinforcement convex tendon (15) of drawing simultaneously.

3, the thin piston of combined type according to claim 1 and 2 is characterized in that described support baffle ring (5) is made of plastics, and has wear resistant filler groove (17) and location retaining platform (20).