CN208535170U - Checking cylinder driving chamber rubber diaphragm - Google Patents

Abstract

The utility model discloses a kind of checking cylinder driving chamber rubber diaphragms, it include film bottom and film side wall, the upper end of film side wall, which extends outwardly, is connected with lip, the lip is pressed between end cap and middle shell, it is characterized by: the lip inner end extends downwardly protrusion along middle inner walls and forms sealing, the sealing be tightly attached under gas pressure in shell inner wall on.The utility model is structurally reasonable, good seal performance.

Description

Checking cylinder driving chamber rubber diaphragm

Technical field

The utility model relates to a kind of improvement of checking cylinder invention more particularly to a kind of checking cylinder driving chamber rubber diaphragms Improve invention.

Background technique

Automobile brake cylinder is made of end cap, clip, diaphragm and middle shell, and traditional diaphragm sealing surface mainly passes through middle shell It squeezes diaphragm by force between end cap to be sealed, the sealing that this kind of single sealing structure is unable to satisfy checking cylinder driving chamber is wanted It asks.

Utility model content

Technical problem to be solved in the utility model be overcome the deficiencies of the prior art and provide it is a kind of structurally reasonable, close The good checking cylinder driving chamber rubber diaphragm of sealing property.

In order to solve the above-mentioned technical problem, the utility model adopts the following technical scheme that realize: this kind of checking cylinder Driving chamber rubber diaphragm, includes film bottom and film side wall, and the upper end of film side wall, which extends outwardly, is connected with lip, which compresses Between end cap and middle shell, it is characterised in that: the lip inner end extends downwardly protrusion along middle inner walls and forms sealing Portion, the sealing be tightly attached under gas pressure in shell inner wall on.

The X of the sealing inner sidewall is greater than the Y-direction stress surface of bottom to stress surface.

The inner sidewall of the sealing is arc-shaped concave.

The sealing is inverted triangular structure.

The chamber rubber diaphragm the utility model has the beneficial effects that improved checking cylinder is driven a vehicle is protected by the way that sealing is arranged Card sealing be tightly attached under gas pressure in shell inner wall on, form gas together between diaphragm lip and middle shell port Pressure defence line.

Detailed description of the invention

Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing.

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is the portion the A enlarged drawing of the utility model Fig. 1.

Specific embodiment

Attached drawing illustrates the structure of the utility model, further illustrates it in relation to details in conjunction with attached drawing below.The braking Cylinder driving chamber rubber diaphragm, includes film bottom 1 and film side wall 2, the upper end of film side wall 2, which extends outwardly, is connected with lip 3, the lip Side 3 is pressed between end cap 4 and middle shell 5, the inner end of the lip 3 along middle 5 inner wall of shell extend downwardly protrusion formed it is close Envelope portion 6, the sealing 6 be tightly attached under gas pressure in shell 5 inner wall on, i.e., sealing 6 is exposed to the position in air pressure The power of gas pressure power 5 inner wall of shell in born is greater than the power of 5 inner wall of shell in disengaging, and air pressure is bigger, sealing Adhesive force of the portion 6 on middle 5 inner wall of shell is bigger；The X of 6 inner sidewall 61 of sealing is greater than the Y-direction of bottom 62 to stress surface Stress surface, so that sealing 6 is tightly attached to middle 5 inner wall of shell, and 6 bottom 62 of sealing will not be started by air pressure, specifically Sealing 6 can be inverted triangular structure, make bottom keep tip reduce stress；The inner sidewall 61 of the sealing 6 is arc Concave surface increases the forced area of inner sidewall, increases the gas pressure power of 5 inner wall of shell in of sealing 6, enhancing sealing effect Fruit.

In conclusion the above is only the preferred embodiments of the present utility model only, it is not intended to limit the utility model Protection scope.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all wrap Containing being within the protection scope of the utility model.

Claims (4)

1. The chamber rubber diaphragm 1. checking cylinder is driven a vehicle, includes film bottom and film side wall, the upper end of film side wall, which extends outwardly, is connected with lip Side, the lip are pressed between end cap and middle shell, it is characterised in that: the lip inner end is extended downwardly along middle inner walls Protrusion form sealing, the sealing be tightly attached under gas pressure in shell inner wall on.
2. The chamber rubber diaphragm 2. checking cylinder as described in claim 1 is driven a vehicle, it is characterised in that: the X of the sealing inner sidewall to Stress surface is greater than the Y-direction stress surface of bottom.
3. The chamber rubber diaphragm 3. checking cylinder as claimed in claim 2 is driven a vehicle, it is characterised in that: the inner sidewall of the sealing is arc Shape concave surface.
4. The chamber rubber diaphragm 4. checking cylinder as claimed in claim 2 is driven a vehicle, it is characterised in that: the sealing is up-side down triangle knot Structure.