CN213628869U - Gas and liquid sealing structure for clutch booster - Google Patents

Abstract

The utility model discloses a gas, liquid seal structure for clutch booster, main cylinder chamber including clutch booster, main cylinder chamber is interior to include cylinder chamber and hydraulic cylinder chamber, the cylinder chamber with the juncture in hydraulic cylinder chamber is equipped with the support ring, the support ring with be equipped with first Y type sealing washer between the cylinder chamber, the support ring with be equipped with second Y type sealing washer between the hydraulic cylinder chamber the breather hole has been seted up on the casing in main cylinder chamber between first Y type sealing washer and the second Y type sealing washer, the outer atmosphere of casing in breather hole intercommunication main cylinder chamber and main cylinder chamber, the opening direction of first Y type sealing washer and second Y type sealing washer sets up in opposite directions. The clutch booster of this scheme of adoption uses gas, liquid seal structure's piston leakproofness is good.

Description

Gas and liquid sealing structure for clutch booster

Technical Field

The utility model relates to a power assisting device of automobile clutch especially relates to a gas, liquid seal structure for clutch booster.

Background

One side of a main cylinder cavity of an existing clutch booster for an automobile is liquid, the other side of the main cylinder cavity is gas, in order to ensure that gas and liquid do not move mutually, two Y-shaped sealing rings which are arranged oppositely are generally adopted for sealing gas and liquid, and when the automobile clutch booster works, compressed air or pressure oil acts on a lip of the Y-shaped sealing ring to enable the lip of the Y-shaped sealing ring to be outwards opened, so that the sealing effect is achieved. Meanwhile, the change of the lip of the Y-shaped sealing ring changes the volume of the rear area of the lip, so that the air is compressed, the pressure of the lip on the piston is weakened, and the sealing effect is affected.

The person skilled in the art therefore endeavors to develop a sealing element which improves the sealing effect

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of the prior art, the utility model aims to solve the technical problem that a gas and liquid sealing structure for clutch booster is provided to guarantee that pressure between Y type sealing washer lip and the piston can not change because of back meeting pressure and influence its sealed effect.

In order to achieve the above object, the utility model provides a gas, liquid seal structure for clutch booster, main cylinder chamber including clutch booster, main cylinder chamber includes cylinder chamber and hydraulic cylinder chamber, characterized by: the cylinder cavity is characterized in that a support ring is arranged at the junction of the cylinder cavity and the liquid cylinder cavity, a first Y-shaped sealing ring is arranged between the support ring and the cylinder cavity, a second Y-shaped sealing ring is arranged between the support ring and the liquid cylinder cavity, a breathing hole is formed in a shell of the main cylinder cavity between the first Y-shaped sealing ring and the second Y-shaped sealing ring and communicated with the atmosphere outside the shell of the main cylinder cavity and the main cylinder cavity, and the opening directions of the first Y-shaped sealing ring and the second Y-shaped sealing ring are arranged oppositely.

Further, the breathing hole includes one section of breathing hole, two sections of breathing hole and the breathing hole three-section that sets gradually in to by the casing, the aperture of one section of breathing hole, two sections of breathing hole and breathing hole three-section reduces in proper order.

Further, the outer orifice of breather hole department is equipped with the breather hole stopper, be equipped with the breather hole gag cap on the breather hole stopper department, be equipped with the air passage in the breather hole stopper, the air passage with the breather hole intercommunication, be equipped with the air vent on the top surface of breather hole gag cap, the aperture of air vent is less than the internal diameter of air passage.

The utility model has the advantages that: at the back of two Y type sealing washers, the back is between two Y type sealing washer closure departments promptly, increases a breathing hole that links to each other with the atmosphere on the casing, when Y type sealing washer pressurized deformation, the regional space in its back can diminish, because this region links to each other with the atmosphere can not produce pressure this moment to guarantee that the pressure between Y type sealing washer lip and the piston can not change because of back can produce pressure and influence its sealed effect. Similarly, when the pressure of the lip of the Y-shaped sealing ring disappears, the space of the back area of the Y-shaped sealing ring becomes larger, and the pressure cannot be generated due to the connection of the area and the atmosphere, so that the sealing effect of the Y-shaped sealing ring cannot be influenced by the pressure change of the back of the Y-shaped sealing ring. Meanwhile, due to the existence of the breathing hole, when the Y-shaped sealing ring at one end of the air seal is worn and slightly leaks air, the leaked air can flow to the atmosphere through the hole due to the existence of the breathing hole, and cannot flow into the liquid at the other end to cause the functional failure of the product due to the fact that the pressure cannot be built, so that the service life of the product is correspondingly prolonged. When the Y-shaped sealing ring at one end of the oil seal leaks due to volume expansion or abrasion, the Y-shaped sealing ring can be observed from the breathing hole in time, and measures such as replacing the sealing ring or the assembly and the like can be found in time, so that the larger loss of the whole vehicle caused by the failure of the booster is avoided.

Drawings

Fig. 1 is a schematic structural view of a gas and liquid sealing structure for a clutch booster according to the present invention;

fig. 2 is an enlarged view at C in fig. 1.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples, wherein it is noted that, in the description of the invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular manner, and therefore should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 2, the utility model provides a gas, hydraulic seal structure for clutch booster, main cylinder chamber 1 including clutch booster, including cylinder chamber 2 and hydraulic cylinder chamber 3 in the main cylinder chamber 1, the juncture in cylinder chamber 2 and hydraulic cylinder chamber 3 is equipped with support ring 4, and the junction is equipped with first Y type sealing washer 5 between support ring 4 and the cylinder chamber 2, and first Y type sealing washer 5 card is between the boss of 4 terminal surfaces of support ring and 2 processing in cylinder chamber. A second Y-shaped sealing ring 6 is arranged at the joint between the support ring 4 and the hydraulic cylinder cavity 3, one end of the second Y-shaped sealing ring 6 is close to the support ring 4, and the other end of the second Y-shaped sealing ring is fixed through an annular mounting plug 12. The first Y-shaped seal ring 5 and the second Y-shaped seal ring 6 are arranged with their opening directions facing each other.

A breathing hole 7 is formed in the shell of the main cylinder cavity 1 between the first Y-shaped sealing ring 5 and the second Y-shaped sealing ring 6, and the breathing hole 7 is communicated with the atmosphere in the main cylinder cavity 1 and the atmosphere outside the shell of the main cylinder cavity 1. The breathing hole 7 comprises a breathing hole section 7-1, a breathing hole section 7-2 and a breathing hole section 7-3 which are sequentially arranged from the outside to the inside of the shell, and the aperture of the breathing hole section 7-1, the aperture of the breathing hole section 7-2 and the aperture of the breathing hole section 7-3 are sequentially reduced. The breathing orifice 7 thus designed ensures ventilation and prevents the entry of dust.

The outer orifice department of breather hole 7 is equipped with breather hole stopper 9, and breather hole stopper 9 tip is equipped with the card platform, and breather hole stopper 9 is equipped with vent channel 8 in the breather hole stopper 9 through the downthehole of card platform card at the outer orifice of breather hole 7, vent channel 8 and breather hole 7 intercommunication. A breathing hole plug cover 10 is further sleeved on the breathing hole plug 9, a breathing hole 11 is arranged on the top surface of the breathing hole plug cover 10, and the aperture of the breathing hole 11 is equal to that of the three sections 7-3 of the breathing hole. The breather plug 9 and the breather plug cover 10 prevent the ingress of dust.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (3)

1. The utility model provides a gas, liquid seal structure for clutch booster, includes clutch booster's master cylinder chamber (1), including cylinder chamber (2) and hydraulic cylinder chamber (3), characterized by in master cylinder chamber (1): the cylinder cavity (2) and the junction of liquid cylinder cavity (3) are equipped with support ring (4), be equipped with first Y type sealing washer (5) between support ring (4) and cylinder cavity (2), be equipped with second Y type sealing washer (6) between support ring (4) and liquid cylinder cavity (3) seted up breather hole (7) on the casing of main cylinder cavity (1) between first Y type sealing washer (5) and second Y type sealing washer (6), breather hole (7) intercommunication main cylinder cavity (1) and the outer atmosphere of casing of main cylinder cavity (1), the opening direction of first Y type sealing washer (5) and second Y type sealing washer (6) sets up in opposite directions.

2. The air-liquid seal structure for a clutch booster as set forth in claim 1, wherein: the breathing hole (7) comprises a first breathing hole section (7-1), a second breathing hole section (7-2) and a third breathing hole section (7-3) which are sequentially arranged from the outside to the inside of the shell, and the aperture of the first breathing hole section (7-1), the second breathing hole section (7-2) and the third breathing hole section (7-3) is sequentially reduced.

3. The air-liquid seal structure for a clutch booster as set forth in claim 2, wherein: the outer orifice department of breather hole (7) is equipped with breather hole stopper (9), be equipped with breather hole stopper lid (10) in breather hole stopper (9) department, be equipped with airway (8) in breather hole stopper (9), airway (8) with breather hole (7) intercommunication, be equipped with on the top surface of breather hole stopper lid (10) air vent (11), the aperture of air vent (11) is less than the internal diameter of airway.

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