CN218480082U - Clutch actuator with novel sealing structure - Google Patents

Abstract

The utility model provides a novel seal structure's clutch executor, form the cavity by cylinder body and piston clearance fit, and install the sealing member in the piston recess, form inclosed cavity with pedestal inner wall interference fit, first sealing member and second sealing member have reasonable interference size with the cavity inner wall, prevent that sliding resistance is too big when guaranteeing the leakproofness, the structure of first sealing member and second sealing member is "Y" type structure, it mainly plays sealed effect to increase first main lip and second main lip simultaneously, and the leakproofness increases along with the increase of cavity internal pressure, vice lip is less with the cavity magnitude of interference, play dustproof and form the effect that the negative pressure guaranteed that the piston has certain displacement before the installation. Simultaneously first sealing member and second sealing member design have two sets of oil storage tanks to as because of the replenishment after the grease scatters and disappears after long-term the use, the existence of oil storage tank has reduced the area of contact with the cavity inner wall, reduces local rigidity, is favorable to further reducing sliding resistance.

Description

Clutch actuator with novel sealing structure

Technical Field

The utility model relates to a novel seal structure's clutch executor belongs to clutch executor technical field.

Background

With the development of science and technology, automatic-gear passenger vehicles are greatly popularized, but the automatic-gear commercial vehicles are still in the rise period in China. The automatic gear shifting technology used by the existing fuel-oil-based commercial vehicle mainly comprises two main types, wherein one type is to additionally arrange an electric control unit on the basis of the original manual gear, a release bearing is pushed through a connecting rod, the interruption of power is realized, and therefore, the automatic gear shifting is realized, and the second type is to directly replace the release bearing with a mode capable of being directly controlled by gas and liquid and a clutch actuator. Compressed air or oil is introduced into the clutch actuator, so that the bearing moves axially along a shaft, the clutch pressure plate is pushed away, and the power of the engine is cut off to achieve the functions of speed change, gear shifting, starting and stopping. Therefore, the system structure is simplified, the reliability is improved, the reaction time is reduced, and meanwhile, the accurate control of the position of the clutch pressure plate can be realized.

Chinese patent No.: CN213117208U, a novel AMT gearbox clutch actuator is mentioned, the double-seal structure design that the device is provided with O type circle and PTFE sealing washer can reduce the whole length of actuator, the arm of force in gearbox vibration process has been reduced, improve its reliability, can retrieve hydraulic system's oilcan with the fluid of leaking simultaneously effectively, but the device actuator casing only sets up limit stop and retaining ring with the push rod junction, it is general to seal the dirt resistance, thereby make the dust of external environment enter into the actuator casing inside easily, make actuator inner chamber pore wall can take place wearing and tearing, thereby influence actuator work efficiency, the clutch actuator of a novel seal structure is urgently needed now to solve the problem that appears.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel seal structure's clutch actuator to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above purpose, the present invention is realized by the following technical solution: the utility model provides a novel seal structure's clutch actuator, includes cylinder body, piston, first sealing member and second sealing member, the cylinder body is passed through the welding by pedestal and dabber and is formed integratively, cylinder body and piston pass through return spring and connect, the piston other end is spacing by the spacing collar, the cylinder body passes through clearance fit with the piston terminal surface and forms the cavity, first sealing member and second sealing member are installed to the cavity in clearance department, first sealing member and pedestal interference fit, second sealing member and dabber interference fit, install the uide bushing in piston and the dabber, uide bushing and dabber clearance fit, first sealing member and second sealing member are installed respectively in the recess of two of piston with piston groove clearance fit.

Further, the circle is provided with first oil storage tank in the first sealing member, and the second oil storage tank is provided with in the second sealing member excircle.

Further, the first sealing element is provided with a first auxiliary lip and a first main lip, wherein the first main lip is oriented towards the bottom of the base body, the first main lip and the first auxiliary lip are in interference fit with the mandrel base body, and the interference magnitude of the first main lip is larger than that of the first auxiliary lip.

Further, the second sealing element is provided with a second auxiliary lip and a second main lip, wherein the direction of the second main lip is consistent with that of the first sealing element, the second main lip and the second auxiliary lip are in interference fit with the inner wall of the base body, and the interference magnitude of the second main lip is larger than that of the second auxiliary lip.

Further, the first sealing element and the second sealing element are both of Y-shaped structures.

Further, the material of the guide sleeve is made of a self-lubricating material.

The utility model has the advantages that: the utility model discloses a novel seal structure's clutch actuator, increase vice lip structure on the basis of sealing member main structure, vice lip is less and 0.5mm with cavity inner wall interference, because clutch actuator has 10-15 mm's pre-compression under the free state after the installation, in the assembling process, if assemble at free state and wheeling, then can lead to the assembly difficulty because there is the elasticity of return spring formation inside the executor, consequently can compress piston to certain distance earlier and lock the air inlet in actual assembly, thereby make clutch actuator cavity and external atmosphere isolated production negative pressure, thereby guarantee that the piston is in by the compression state with this. The existence of the auxiliary lip can effectively prevent the compressed piston from returning to the free height due to air leakage in the assembling process. Meanwhile, in use, due to the existence of the auxiliary lip, foreign matters such as dust particles and the like can be effectively prevented from directly entering the inner wall of the cavity, so that the sealing performance is reduced, and the grease in the cavity is polluted.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a partial structure diagram of the present invention;

FIG. 2 is a schematic view of a sealing member at a base;

FIG. 3 is a three-dimensional reference view of the seal at the seat;

FIG. 4 is a schematic view of a seal configuration at the mandrel;

FIG. 5 is a three-dimensional reference view of the seal at the mandrel;

in the figure: the device comprises a mandrel 1, a base body 2, a return spring 3, a base body sealing piece 4, a mandrel sealing piece 5, a guide sleeve 6, a piston 7, a cavity 8, a first auxiliary lip 41, a first oil storage groove 42, a first main lip 43, a base body inner wall reference line 44, a second auxiliary lip 51, a second oil storage groove 52, a second main lip 53 and a mandrel outer wall reference line 54.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a novel seal structure's clutch executor, which comprises a cylinder body, piston 7, first sealing member and second sealing member 5, the cylinder body is passed through welding by pedestal 2 and dabber 1 and forms integratively, cylinder body and piston 7 pass through return spring 3 and connect, the piston 7 other end is spacing by the spacing collar, the cylinder body passes through clearance fit with piston 7 terminal surface and forms cavity 8, cavity 8 installs first sealing member 4 and second sealing member 5 in clearance department, first sealing member 4 and 2 interference fit of pedestal, second sealing member 5 and 1 interference fit of dabber, install uide bushing 6 in piston 7 and the dabber 1, uide bushing 6 and dabber clearance fit, install respectively in two recesses of piston 7 with piston groove clearance fit first sealing member 4 and second sealing member.

As a first embodiment of the present invention: the inner circle of the first sealing element 4 is provided with a first oil storage groove 42, the outer circle of the second sealing element 5 is provided with a second oil storage groove 52, the first sealing element 4 is provided with a first auxiliary lip 41 and a first main lip 43, wherein the first main lip 43 is towards the bottom direction of the base body 2, the first main lip 43 and the first auxiliary lip 41 are in interference fit with the mandrel base body, the interference of the first main lip 43 is larger than that of the first auxiliary lip 41, the second sealing element 5 is provided with a second auxiliary lip 51 and a second main lip 53, the direction of the second main lip 53 is consistent with that of the first sealing element 4, the second main lip 53 and the second auxiliary lip 51 are in interference fit with the inner wall of the base body 2, the second main lip 53 is larger than that of the second auxiliary lip 51, the first sealing element 4 and the second sealing element 5 are both in a Y-shaped structure, the first main lip 43 and the second main lip 53 respectively form an included angle of about 25 degrees with the inner wall of the cavity, the interference magnitude with the outer wall of the cavity is 1.7mm, the Shore hardness of the sealing elements is 70-80 degrees, after the first sealing element 4 and the second sealing element 5 are installed, the first main lip 43 and the second main lip 53 are respectively reduced with the inner wall of the cavity due to the fact that the first sealing element 4 and the second sealing element 5 are extruded by the inner wall of the cavity, and due to the fact that the first sealing element 4 and the second sealing element 5 are elastic, certain pressure can be guaranteed between the first sealing element 4 and the cavity and between the second sealing element 5 and the cavity, air leakage of the cavity can be avoided after compressed air is introduced, after gear shifting is finished, after the cavity is in pressure contact with the atmosphere, due to the fact that the air pressure is reduced, the trend of the pressure expansion caused by the influence is reduced, the pressure of the first sealing element 4 and the second sealing element 5 and the inner wall of the cavity is reduced, and therefore sliding resistance is not influenced.

As a second embodiment of the present invention: the first oil storage tank 42 and the second oil storage tank 52 are fully coated with lubricating grease, meanwhile, the inner wall of the cavity is coated with lubricating grease with large viscosity, dry friction with the inner wall of the cavity is avoided when the sealing element moves, the other end of the first sealing element 4 is placed into a groove of the piston 7 and is in clearance fit with the second sealing element 5, the position is limited by two end faces of the groove, the guide sleeve 6 is placed into another groove of the piston 7 and is in clearance fit with the mandrel 1, the return spring is placed between the piston 7 and the seat body 2, and certain pre-tightening force is guaranteed between the piston 7 and the diaphragm spring when no compressed air is introduced after installation.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. The utility model provides a novel seal structure's clutch executor, includes cylinder body, piston, first sealing member and second sealing member, its characterized in that: the cylinder body passes through the welding by pedestal and dabber and forms integratively, cylinder body and piston pass through return spring and connect, the piston other end is spacing by the spacing collar, the cylinder body passes through clearance fit with the piston terminal surface and forms the cavity, first sealing member and second sealing member are installed to the cavity in clearance department, first sealing member and pedestal interference fit, second sealing member and dabber interference fit, install the uide bushing in piston and the dabber, uide bushing and dabber clearance fit, first sealing member and second sealing member are installed respectively in two recesses of piston with piston groove clearance fit.

2. The clutch actuator with the novel sealing structure according to claim 1, wherein: the circle in the first sealing element is provided with a first oil storage tank, and the circle in the second sealing element is provided with a second oil storage tank.

3. The clutch actuator with the novel sealing structure according to claim 1, wherein: the first sealing element is provided with a first auxiliary lip and a first main lip, wherein the direction of the first main lip faces the direction of the bottom of the base body, the first main lip and the first auxiliary lip are in interference fit with the mandrel base body, and the interference of the first main lip is larger than that of the first auxiliary lip.

4. The clutch actuator with the novel sealing structure according to claim 1, characterized in that: the second sealing element is provided with a second auxiliary lip and a second main lip, wherein the direction of the second main lip is consistent with that of the first sealing element, the second main lip and the second auxiliary lip are in interference fit with the inner wall of the seat body, and the interference of the second main lip with the second auxiliary lip is larger.

5. The clutch actuator with the novel sealing structure according to claim 1, characterized in that: the first sealing element and the second sealing element are both Y-shaped structures.

6. The clutch actuator with the novel sealing structure according to claim 1, wherein: the material of the guide sleeve is made of self-lubricating material.

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