A shaft end sealing structure in a clutch booster housing
By setting a sealing ring blank and bushing on the shaft end seal sleeve of the clutch booster, the problem of axial movement of the push rod leads to disengage the seal structure, and better sealing performance is achieved.
Patent Information
- Application Number
- CN202421591307.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-07-05
AI Technical Summary
In existing automotive clutch boosters, the axial movement of the push rod causes the sealing structure to be released from the metal sealing sleeve, causing the problem of poor sealing performance.
A shaft end sealing structure in the clutch booster housing is designed, and a sealing ring blank is provided on the front side of the shaft end sealing sleeve and a bushing is provided on the rear side to form a position limit on the first and second shaft end sealing rings to ensure sealing performance.
It effectively guarantees the sealing performance, prevents the sealing ring from falling out, and improves the sealing effect of the clutch booster.
Smart Images
Figure CN222702558U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile clutch boosters, in particular to a shaft end sealing structure in a clutch booster housing. Background Art
[0002] An existing automobile clutch booster includes a cylindrical shell, one end of which is connected to a cylinder, a push rod is arranged in the shell, the push rod extends into the cylinder and is connected to a piston in the cylinder, a piston structure connected to the push rod is also arranged in the shell, and a port at which the inner cavity of the shell and the cylinder are connected needs to be sealed.
[0003] Generally, a sealing sleeve is arranged on the push rod, and an O-ring or a sealing leather cup structure is arranged between the sealing sleeve and the shell wall and between the sealing sleeve and the push rod. Since the push rod may move axially, the rubber sealing structure may fall out of the metal sealing sleeve. Utility Model Content
[0004] In view of the problems pointed out in the background technology, the utility model proposes a shaft end sealing structure in a clutch booster housing to solve the above technical problems.
[0005] The technical solution of the utility model is achieved in this way:
[0006] A shaft end sealing structure in a clutch booster housing comprises a housing, a push rod is arranged in the housing, a shaft end sealing sleeve is connected to the push rod, an annular first mounting groove is arranged on the outer wall of the shaft end sealing sleeve, an O-ring is arranged in the first mounting groove, an annular second mounting groove is arranged on the inner wall of the shaft end sealing sleeve, the second mounting groove runs through the front end of the shaft end sealing sleeve, an annular first shaft end sealing ring is arranged in the second mounting groove, a retaining ring is arranged on the inner side of the housing, the retaining ring is located at the front side of the shaft end sealing sleeve, and an annular sealing ring retaining plate is arranged between the retaining ring and the shaft end sealing sleeve.
[0007] The utility model is further configured such that an annular second shaft end sealing ring is provided on the rear side of the shaft end sealing sleeve, an annular bushing is provided on the rear side of the second shaft end sealing ring, the front end of the bushing abuts against the second shaft end sealing ring, the rear end of the bushing abuts against the inner wall of the shell and limits the bushing from moving backwards, the bushing is spaced apart from the push rod and the inner wall of the shell, and an oil hole is provided on the bushing.
[0008] The utility model is further configured such that the cross section of the first shaft end sealing ring is a nearly V-shaped structure.
[0009] The utility model is further configured such that the cross section of the second shaft end sealing ring is a nearly U-shaped structure.
[0010] The utility model is further configured such that the inner diameter of the sealing ring baffle is greater than the diameter of the push rod.
[0011] The utility model is further configured such that the distance between the retaining ring and the shaft end sealing sleeve is smaller than the axial length of the first shaft end sealing ring.
[0012] By adopting the above technical solution, the beneficial effects of the utility model are as follows:
[0013] The shaft end sealing structure in the clutch booster housing provided by the utility model is provided with a sealing ring baffle on the front side of the shaft end sealing sleeve to limit the position of the first shaft end sealing ring, and a bushing is provided on the rear side of the shaft end sealing sleeve to limit the position of the second shaft end sealing ring, thereby ensuring the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0015] Figure 1 It is a structural schematic diagram of the utility model.
[0016] Figure 2 For this utility model Figure 1 Enlarged view of part A in . DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] For reference Figure 1-2 The utility model is described as follows:
[0019] Embodiment 1: A shaft end sealing structure in a clutch booster housing comprises a housing 1, a push rod 2 is arranged in the housing 1, a shaft end sealing sleeve 3 is connected to the push rod 2, the shaft end sealing sleeve 3 is in a circular ring shape, and the outer diameter of the shaft end sealing sleeve 3 is equal to the diameter of the inner cavity of the housing 1.
[0020] An annular first mounting groove 4 is provided on the outer wall of the shaft end sealing sleeve 3 , an O-ring 5 is provided in the first mounting groove 4 , and the O-ring 5 forms a sealing fit between the shaft end sealing sleeve 3 and the wall of the inner cavity of the housing 1 .
[0021] An annular second mounting groove 6 is provided on the inner side wall of the shaft end sealing sleeve 3. The second mounting groove 6 runs through the front end of the shaft end sealing sleeve 3. An annular first shaft end sealing ring 7 is provided in the second mounting groove 6. The cross section of the first shaft end sealing ring 7 is a nearly V-shaped structure. The first shaft end sealing ring 7 forms a sealing fit between the shaft end sealing sleeve 3 and the push rod 2.
[0022] A retaining ring 8 is provided on the inner side of the housing 1. The retaining ring 8 is an open retaining ring. An annular groove for mounting the retaining ring 8 is provided on the wall of the inner cavity of the housing 1. The retaining ring 8 is located at the front side of the shaft end sealing sleeve 3. An annular sealing ring baffle 9 is provided between the retaining ring 8 and the shaft end sealing sleeve 3. The sealing ring baffle 9 is movably sleeved on the push rod 2. The inner diameter of the sealing ring baffle 9 is larger than the diameter of the push rod 2. The distance between the retaining ring 8 and the shaft end sealing sleeve 3 is smaller than the axial length of the first shaft end sealing ring 7 (for this structure, even if the first shaft end sealing ring 7 is moved out of the second installation groove 6, it can only be moved out partially and cannot be completely removed from the second installation groove 6). By adopting the above technical solution, the sealing ring baffle 9 can limit the first shaft end sealing ring 7, blocking and limiting the first shaft end sealing ring 7 in the second installation groove 6.
[0023] An annular second shaft end sealing ring 10 is provided on the rear side of the shaft end sealing sleeve 3. The cross section of the second shaft end sealing ring 10 is a nearly U-shaped structure. An annular bushing 11 is provided on the rear side of the second shaft end sealing ring 10. The front end of the bushing 11 abuts against the second shaft end sealing ring 10. The front end of the bushing 11 extends into the inner side of the U-shaped opening of the second shaft end sealing ring 10. The rear end of the bushing 11 abuts against the inner wall of the housing 1 and limits the bushing 11 from moving backward. The bushing 11 is spaced apart from the push rod 2 and the inner wall of the housing 1. An oil hole 12 is provided on the bushing 11. In the above technical scheme, the bushing 11 limits the second shaft end sealing ring 10, prevents the second shaft end sealing ring 10 from moving backward, and makes the second shaft end sealing ring 10 abut against the shaft end sealing sleeve 3.
[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A shaft end sealing structure in a clutch booster housing, comprising a housing (1), a push rod (2) being arranged in the housing (1), a shaft end sealing sleeve (3) being connected to the push rod (2), characterized in that: An annular first mounting groove (4) is provided on the outer side wall of the shaft end sealing sleeve (3), an O-ring (5) is provided in the first mounting groove (4), an annular second mounting groove (6) is provided on the inner side wall of the shaft end sealing sleeve (3), the second mounting groove (6) runs through the front end of the shaft end sealing sleeve (3), an annular first shaft end sealing ring (7) is provided in the second mounting groove (6), a retaining ring (8) is provided on the inner side of the housing (1), the retaining ring (8) is located at the front side of the shaft end sealing sleeve (3), and an annular sealing ring retaining plate (9) is provided between the retaining ring (8) and the shaft end sealing sleeve (3).
2. The shaft end sealing structure in the clutch booster housing according to claim 1, characterized in that: An annular second shaft end sealing ring (10) is provided on the rear side of the shaft end sealing sleeve (3), and an annular bushing (11) is provided on the rear side of the second shaft end sealing ring (10). The front end of the bushing (11) abuts against the second shaft end sealing ring (10), and the rear end of the bushing (11) abuts against the inner wall of the housing (1) and limits the bushing (11) from moving backwards. The bushing (11) is spaced apart from the push rod (2) and the inner wall of the housing (1), and an oil hole (12) is provided on the bushing (11).
3. The shaft end sealing structure in the clutch booster housing according to claim 1, characterized in that: The cross section of the first shaft end sealing ring (7) is a nearly V-shaped structure.
4. The shaft end sealing structure in the clutch booster housing according to claim 2, characterized in that: The cross section of the second shaft end sealing ring (10) is a nearly U-shaped structure.
5. The shaft end sealing structure in the clutch booster housing according to claim 1, characterized in that: The inner diameter of the sealing ring baffle (9) is greater than the diameter of the push rod (2).
6. The shaft end sealing structure in the clutch booster housing according to claim 1, characterized in that: The distance between the retaining ring (8) and the shaft end sealing sleeve (3) is smaller than the axial length of the first shaft end sealing ring (7).