CN201110337Y

CN201110337Y - Air pressure type damper

Info

Publication number: CN201110337Y
Application number: CNU2007200609674U
Authority: CN
Inventors: 唐善培
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-05
Filing date: 2007-12-05
Publication date: 2008-09-03
Anticipated expiration: 2017-12-05

Abstract

The utility model in particular relates to an air pressure damper comprises an outer shell, a main shaft and piston, a gas track is formed on along the length direction on the inner wall of the cavity of the outer shell, a stopper is formed on the rear portion of the piston and an expansion gum cover is sleeved on the front portion, a vent groove is formed on the outer wall of the expansion gum cover, a fastening piece which is fixedly installed on the piston is arranged on the front end of the expansion gum cover, the fastening piece is connected with the main shaft, a packing ring is rotationally sleeved between the stopper and the expansion gum cover, and a vent pit is formed from the end of the piston to the inner of the expansion gum cover. After the above proposals are adopted, since air is adopted to replace liquid, the phenomenon that oil leak of the damper is avoided, simultaneously, environment and temperature have no effect to the damper, and normal working of the damper is the guaranteed, the service life is prolonged, simultaneously, since hydraulic-oil is saved by the damper, so the manufacturing cost is reduced.

Description

A kind of pneumatic-typed damper

Technical field:

The utility model relates to the damper technique field, refers in particular to a kind of pneumatic-typed damper.

Background technique:

Existing damper all is a hydraulic type, and oil leakage phenomenon takes place in this damper using process easily, and the life-span is short, if the Environmental Conditions temperature is low excessively, can influence the flowability of liquid in the damper, and serious meeting is condensed, and damper will be ineffective.

Summary of the invention:

The purpose of this utility model is in order to solve the shortcoming of above-mentioned prior art, a kind of pneumatic-typed damper to be provided.

For achieving the above object, the technological scheme that the utility model provides is: a kind of pneumatic-typed damper, include shell, main shaft and piston, form air drain in the inwall of shell cavity and along its length, the rear portion of piston forms limiting stopper, the front portion is set with the expansion gum cover, form vent slot on the outer wall of this expansion gum cover, front end at this expansion gum cover is provided with the fastening piece that is packed on the piston, this fastening piece is connected with main shaft, activity is with seal ring between limiting stopper and expansion gum cover, and the end from piston on piston forms the ventilation hole in expansion gum cover body.

After adopting technique scheme, owing to adopt air to replace liquid, damper oil leakage phenomenon can not occur, is not subjected to the influence of ambient temperature simultaneously, guarantees the proper functioning of damper, and ILS because this damper has saved hydraulic oil, is saved cost of production simultaneously.

Description of drawings:

Structural representation when Fig. 1 is a damper tension of the present utility model;

Structural representation when Fig. 2 is a damper pressurized of the present utility model;

Fig. 3 is the transverse sectional view of damper shell of the present utility model;

Fig. 4 is the A-A sectional view of Fig. 3;

Fig. 5 is the sectional view of expansion gum cover of the present utility model;

Fig. 6 is the side view of expansion gum cover of the present utility model;

Fig. 7 is the partial enlarged drawing of the B part of Fig. 1;

Fig. 8 is the partial enlarged drawing of the C part of Fig. 2.

Embodiment:

Now 1～Fig. 8 elaborates the utility model in conjunction with the accompanying drawings:

This pneumatic-typed damper includes shell 1, main shaft 2 and piston 3, form air drain 4 in the inwall of shell 1 cavity and along its length, the rear portion of piston 3 forms limiting stopper 5, the front portion is set with expansion gum cover 6, form vent slot 7 on the outer wall of this expansion gum cover 6, front end at this expansion gum cover 6 is provided with the fastening piece 8 that is packed on the piston 3, fastening piece 8 is connected with main shaft 2, activity is with seal ring 9 between limiting stopper 5 and expansion gum cover 6, and the end 10 from piston 3 on piston 3 forms ventilation hole 11 in expansion gum cover 6 bodies.

When the damper tension, seal ring 9 relies on limiting stopper 5, and the air in the cavity of right side flows to the left side cavity through air drain 4, vent slot 7 and ventilation hole 11, and at this moment damper does not play buffer function; When the damper pressurized, seal ring 9 relies on expansion gum cover 6, air pressurized in the cavity of right side, these pressurized air 11 impose tension force to expansion gum cover 6 through the ventilation hole, and expansion gum cover 6 will expand, effect with shell 1 inwall is is simultaneously filled and led up vent slot 7, air just can not flow through through vent slot 7 again, and can only flow through through air drain 4, and the flow of air reduces, at this moment, damper plays the effect of damping.

Claims

1. pneumatic-typed damper, include shell (1), main shaft (2) and piston (3), it is characterized in that: form air drain (4) in the inwall of shell (1) cavity and along its length, the rear portion of piston (3) forms limiting stopper (5), the front portion is set with expansion gum cover (6), form vent slot (7) on the outer wall of this expansion gum cover (6), front end at this expansion gum cover (6) is provided with the fastening piece (8) that is packed on the piston (3), this fastening piece (8) is connected with main shaft (2), activity is with seal ring (9) between limiting stopper (5) and expansion gum cover (6), goes up from the end (10) of piston (3) in piston (3) and form ventilation hole (11) in expansion gum cover (6) body.