Half shaft retainer sealing structure
By forming a maze structure between the half-axis guard ring and the differential oil seal lip and spraying nanocoating on the surface of the half-axis guard ring, the problem of poor sealing effect of the traditional half-axis guard ring is solved, and more effective water and long life of dust blocking and oil sealing lip.
Patent Information
- Application Number
- CN202421190146.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The traditional semi-axis guardrail design has the problem of poor sealing effect, which causes water, sand and dust and soil to enter the outer oil seal, thereby affecting the sealing effect of the inner oil seal.
Design a semi-axis guard ring sealing structure, by forming a maze structure between the semi-axis guard ring and the differential oil sealing lip, using the arrangement of the first, second and third guard ring parts, combined with the use of nanocoating, Enhance hydrophobicity to block the invasion of water and sand.
It effectively avoids oil seal wear caused by interference, improves the sealing effect, enhances the ability to block water and dust, and extends the life of the oil seal lip.
Smart Images
Figure CN222458354U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of automobile half-axle guard rings, and in particular relates to a half-axle guard ring sealing structure. Background Art
[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.
[0003] The traditional half-axle retainer is designed as a flat structure, and generally adopts an interference fit or a clearance fit with the differential outer oil seal lip. The interference fit method will cause the outer oil seal lip edge to wear after the half-axle runs at high speed for a long time, and the sealing effect will gradually deteriorate. The clearance fit method has a structural defect of poor sealing effect, which causes mud, dust and water to enter the outer oil seal, and finally causes the inner oil seal to fail to seal. In addition, the surface of the traditional retainer is not treated, and the hydrophobicity is poor. Water droplets are easily gathered on the surface of the retainer and cannot fall off from the surface of the retainer in time, making it easier for water to enter the outer seal lip. Utility Model Content
[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a half-shaft retainer ring sealing structure, which can form a labyrinth structure between the half-shaft retainer ring and the differential oil seal lip, and can effectively block the intrusion of water and dust.
[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:
[0006] In the first aspect, the utility model provides a half-shaft guard ring sealing structure, including a half-shaft, which is embedded in a differential housing, and a half-shaft guard ring and a differential oil seal lip are arranged between the half-shaft and the differential housing port; the half-shaft guard ring wraps the differential oil seal lip on the inside, and the half-shaft guard ring includes a first guard ring part, a second guard ring part and a third guard ring part that are connected in sequence into one body, the first guard ring part is parallel to the axial direction of the half-shaft, the second guard ring part is perpendicular to the axial direction of the half-shaft, the third guard ring part has an angle with the axial direction of the half-shaft, and there is a gap between the third guard ring part and the outer side of the differential oil seal lip.
[0007] As a further technical solution, a pressure ring is sleeved on the outer side of the half-shaft corresponding to the port of the differential housing, and a differential oil seal lip and a half-shaft guard ring are fixedly arranged on the outer periphery of the pressure ring.
[0008] As a further technical solution, the first guard ring portion is arranged in contact with the outer side of the pressure ring and is fixed to the outer side of the pressure ring.
[0009] As a further technical solution, the second guard ring portion is extended outward from the connection with the first guard ring portion.
[0010] As a further technical solution, the third guard ring portion is extended from the connection with the second guard ring portion toward the differential oil seal lip, and a gap is provided between the third guard ring portion and the differential housing.
[0011] As a further technical solution, one end of the third guard ring portion is fixedly connected to the second guard ring portion, and the other end of the third guard ring portion is suspended, and the suspended end has a bend, which is arranged toward the outside.
[0012] As a further technical solution, the outer side surface of the differential oil seal lip is an inclined surface, and the outer side surface forms an angle with the axial direction of the half shaft.
[0013] As a further technical solution, the third retaining ring portion and the inclined surface of the differential oil seal lip are arranged in parallel, and there is a space between the second retaining ring portion and the differential oil seal lip.
[0014] As a further technical solution, the first guard ring portion and the second guard ring portion are connected in a smooth transition, and the second guard ring portion and the third guard ring portion are connected in a smooth transition; the first guard ring portion, the second guard ring portion and the third guard ring portion are an integrated structure.
[0015] As a further technical solution, a nano coating is sprayed on the surface of the half-shaft guard ring.
[0016] The beneficial effects of the above utility model are as follows:
[0017] The half-shaft guard ring sealing structure of the utility model is that the half-shaft guard ring wraps the differential oil seal lip inside, and through the arrangement of the first, second and third guard ring parts, the half-shaft guard ring and the differential oil seal lip form a maze structure, which not only avoids the oil seal wear caused by interference, but also can more effectively block the invasion of water and dust compared with the traditional gap matching sealing structure.
[0018] In the semi-axle retaining ring sealing structure of the utility model, the suspended end of the third retaining ring portion has a bend, and the bend is arranged toward the outside. Through the arrangement of the bend, the corresponding water and sand blocking effect can be further achieved.
[0019] The semi-axle guard ring sealing structure of the utility model is sprayed with a nano coating on the surface of the semi-axle guard ring, which increases its hydrophobicity, further improves the water and dust blocking effect, and better copes with harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0021] Figure 1It is a schematic diagram of a half-shaft retainer seal structure according to one or more embodiments of the utility model;
[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle;
[0023] In the figure: 1. differential case, 2. differential oil seal lip, 3. half-shaft guard ring, 4. pressure ring, 5. half-shaft, 6. nano coating, 31. first guard ring part, 32. second guard ring part, 33. third guard ring part.
[0024] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION
[0025] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.
[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or their combinations;
[0027] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.
[0028] Terminology explanation section: If the terms "install", "connect", "connect", "fixed" and so on appear in the present invention, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.
[0029] In a typical implementation of the present invention, Figure 1-Figure 2As shown, a half-shaft retainer ring sealing structure is proposed, including a differential housing 1, a differential oil seal lip 2, a half-shaft retainer ring 3, a pressure ring 4, a half-shaft 5 and a nano coating 6.
[0030] The half shaft 5 is embedded in the differential case 1 , and a pressure ring 4 , a half shaft guard ring 3 and a differential oil seal lip 2 are arranged between the half shaft 5 and the port of the differential case 1 .
[0031] During the specific installation, the half-shaft 5 is extended into the interior of the differential housing 1 from the port of the differential housing 1, and a pressure ring 4 is sleeved on the outer side of the half-shaft 5 corresponding to the port of the differential housing 1. The differential oil seal lip 2 and the half-shaft retaining ring 3 are fixedly arranged on the outer periphery of the pressure ring 4. The half-shaft retaining ring 3 wraps the differential oil seal lip 2 inside, and the half-shaft retaining ring 3 and the differential oil seal lip 2 form a maze structure.
[0032] The pressing ring 4 is an annular structure and is sleeved on the outer circumference of the half shaft 5. Since the diameters of the half shaft 5 are usually different, the half shaft retaining ring 3 is usually of one specification, and the pressing ring 4 is provided to match the half shaft and the half shaft retaining ring. The pressing ring 4 can be made of metal.
[0033] Furthermore, the differential oil seal lip 2 and the half-shaft retaining ring 3 are located between the pressure ring 4 and the differential housing 1 .
[0034] The differential oil seal lip 2 is fixed to the outer peripheral side of the pressure ring 4 , and the outer side of the differential oil seal lip 2 is inclined, that is, the outer side surface of the differential oil seal lip 2 is an inclined surface, and its outer side surface has a certain angle with the axis of the half shaft 5 .
[0035] The half-shaft retaining ring 3 and the pressure ring 4 are assembled together in an interference fit manner.
[0036] The half-shaft retaining ring 3 includes a first retaining ring portion 31, a second retaining ring portion 32, and a third retaining ring portion 33, which are sequentially connected into one body, and the first retaining ring portion 31 and the second retaining ring portion 32 are smoothly transitionally connected, and the second retaining ring portion 32 and the third retaining ring portion 33 are smoothly transitionally connected.
[0037] The first retaining ring portion 31 is parallel to the axial direction of the pressing ring 4 , and the first retaining ring portion 31 is disposed in contact with the outer side of the pressing ring 4 and is fixed to the outer side of the pressing ring 4 .
[0038] The second retaining ring portion 32 is perpendicular to the axial direction of the pressing ring 4 , and the second retaining ring portion 32 is extended outward from the connection with the first retaining ring portion 31 .
[0039] The third guard ring portion 33 is arranged obliquely, that is, the third guard ring portion 33 forms a certain angle with the axial direction of the pressure ring 4; the third guard ring portion 33 extends from the connection with the second guard ring portion 32 toward the differential oil seal lip 2, and the half-axle guard ring 3 wraps the differential oil seal lip 2 therein.
[0040] The third retaining ring portion 33 and the outer inclined surface of the differential oil seal lip 2 are arranged in parallel, and there is a certain gap between the third retaining ring portion 33 and the outer side of the differential oil seal lip 2, and there is also a corresponding space between the second retaining ring portion 32 and the differential oil seal lip 2.
[0041] One end of the third retaining ring portion 33 is fixedly connected to the second retaining ring portion 32, and the other end of the third retaining ring portion 33 is suspended, and the suspended end has a bend, and the bend is arranged toward the outside. The bend arrangement can play a certain water and sand blocking effect.
[0042] There is a gap between the third retaining ring portion 33 and the differential case 1. The purpose of setting the gap is: 1. to facilitate the assembly of the half shaft; 2. since the half shaft is a high-speed rotating part, it is necessary to maintain a safe gap with the differential case, and setting the gap can prevent interference.
[0043] As a result, the half-shaft guard ring and the differential oil seal lip form a maze structure, which not only avoids the oil seal wear caused by interference, but also compared with the traditional clearance fit sealing structure, there is a gap between the oil seal lip and the guard ring, the oil seal is not easy to wear and has a longer service life; the gap between the guard ring and the half-shaft is smaller, which can better prevent the intrusion of water and dust.
[0044] The first retaining ring portion 31 , the second retaining ring portion 32 , and the third retaining ring portion 33 are an integrated structure and can be integrally formed.
[0045] In a preferred embodiment, a nano coating 6 is sprayed on the surface of the half-shaft retaining ring 3 to increase its hydrophobicity and further improve the water and dust blocking effect.
[0046] The half-shaft retainer sealing structure is characterized in that a pressure ring 4 is sleeved on the outer side of the half-shaft 5, a nano coating is sprayed on the surface of the half-shaft retainer 3, and then the half-shaft retainer and the pressure ring are assembled together by interference fit, and a differential oil seal lip 2 is installed on the outer side of the pressure ring 4 to form a half-shaft assembly, and then the half-shaft assembly is assembled with the differential housing 1. After the half-shaft retainer is assembled in place, the half-shaft retainer and the differential oil seal lip form a maze structure, which ensures the sealing effect while avoiding the wear of the oil seal lip.
[0047] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A half-shaft retainer seal structure, characterized in that: It includes a half shaft, which is embedded in a differential case. A half shaft guard ring and a differential oil seal lip are arranged between the half shaft and the differential case port; the half shaft guard ring wraps the differential oil seal lip inside, and the half shaft guard ring includes a first guard ring part, a second guard ring part and a third guard ring part that are sequentially connected into one body, the first guard ring part is parallel to the axial direction of the half shaft, the second guard ring part is perpendicular to the axial direction of the half shaft, the third guard ring part has an angle with the axial direction of the half shaft, and there is a gap between the third guard ring part and the outer side of the differential oil seal lip.
2. The half-shaft retainer seal structure according to claim 1, characterized in that: A pressure ring is sleeved on the outer side of the half shaft corresponding to the differential housing port, and a differential oil seal lip and a half shaft guard ring are fixedly arranged on the outer periphery of the pressure ring.
3. The half-shaft retainer seal structure according to claim 2, characterized in that: The first guard ring portion is disposed in contact with the outer side of the pressing ring and is fixed to the outer side of the pressing ring.
4. The half-shaft retainer seal structure as claimed in claim 3 is characterized in that: The second guard ring portion is extended outward from a connection with the first guard ring portion.
5. The half-shaft retainer seal structure as claimed in claim 4 is characterized in that: The third retaining ring portion is extended from the connection with the second retaining ring portion toward the differential oil seal lip, and a gap is provided between the third retaining ring portion and the differential housing.
6. The half-shaft retainer seal structure according to claim 1, characterized in that: One end of the third guard ring portion is fixedly connected to the second guard ring portion, and the other end of the third guard ring portion is suspended, and the suspended end has a bend, which is arranged toward the outside.
7. The half-shaft retainer seal structure according to claim 1, characterized in that: The outer side surface of the differential oil seal lip is an inclined surface, and the outer side surface forms an angle with the axial direction of the half shaft.
8. The half-shaft retainer seal structure according to claim 7, characterized in that: The third retaining ring portion and the differential oil seal lip inclined surface are arranged in parallel, and there is a space between the second retaining ring portion and the differential oil seal lip.
9. The half-shaft retainer seal structure according to claim 1, characterized in that: The first guard ring portion and the second guard ring portion are connected in a smooth transition, and the second guard ring portion and the third guard ring portion are connected in a smooth transition; the first guard ring portion, the second guard ring portion and the third guard ring portion are an integrated structure.
10. The half-shaft retainer seal structure according to claim 1, characterized in that: The surface of the half-shaft guard ring is sprayed with a nano coating.