Wing-shaped universal joint assembly of sealing structure
By adopting a sealing structure combining oil seal and dustproof cover in the airfoil universal joint assembly, the problem of insufficient sealing in the prior art is solved, better sealing effect and longer service life are achieved, and the outside world is blocked. Impurities.
Patent Information
- Application Number
- CN202420373324.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-02-28
AI Technical Summary
The sealing structure of the existing airfoil universal joint assembly is insufficiently sealed because the oil seal and the shaft bowl are only in one place, which is prone to wear and gaps. The manufacturing accuracy requirements of the oil seal are high, resulting in insufficient sealing.
It adopts a sealing structure combining an oil seal and a dust-proof cover, where the oil seal consists of a skeleton and a rubber body. The oil seal and the dust-proof cover come into contact with the "3" cross-section of the dust-proof cover is in close contact with the airfoil bearing and the cross shaft. Ensure sealing effect.
It significantly improves sealing performance, extends service life, and effectively blocks external impurities from entering, adapting to harsh environments.
Smart Images
Figure CN222277278U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the structure of a universal joint assembly, in particular to a wing-type universal joint assembly with a sealing structure. Background Art
[0002] The existing wing-shaped universal joint assembly is mainly composed of a cross shaft, a wing-shaped bearing, an oil seal, and a shaft bowl. Figure 1 As shown, the sealing structure consists of an oil seal and a shaft bowl. The oil seal and the shaft bowl are in contact at only one place, resulting in insufficient sealing and prone to wear and gaps, which can cause mud to enter. The lip shape of the oil seal is irregular and cooperates with the two shoulders of the cross shaft. The height difference between the two shoulders is large, which requires high manufacturing precision of the oil seal and causes the oil seal to be insufficiently sealed. Summary of the invention
[0003] The utility model aims to solve the above-mentioned shortcomings of the prior art and provide a wing-shaped universal joint assembly with a sealing structure having better sealing performance and longer service life.
[0004] The utility model adopts a technical solution to solve the technical problem: the wing-shaped universal joint assembly with a sealing structure comprises a wing-shaped bearing and a cross shaft, the wing-shaped bearing is assembled on the shaft neck of the cross shaft, a sealing structure is arranged between the wing-shaped bearing and the cross shaft, the sealing structure consists of an oil seal and a dust cover, the oil seal and the dust cover are in contact with each other, the oil seal is located between the longitudinal contact part of the wing-shaped bearing and the shaft neck, and the dust cover is located between the axial contact part of the wing-shaped bearing and the shaft neck.
[0005] The oil seal is composed of a skeleton I and a rubber body I. The skeleton I is in close contact with the inner side of the airfoil bearing. The rubber body I is provided with three lips, which are interference fit with the same step shoulder of the cross shaft journal.
[0006] The dust cover is composed of a skeleton II and a rubber body II. The rubber body II is wrapped outside the skeleton II. The outer circle of the rubber body II is interference fit with the mouth of the airfoil bearing. The middle of the rubber body II is tightly fitted with the skeleton I. The inner circle of the rubber body II is interference fit with the cross shaft 4.
[0007] The cross section of the dust cover is in a "3" shape.
[0008] The beneficial effects of the utility model are as follows: the utility model realizes the sealing of the wing-shaped universal joint by combining an oil seal and a dust cover, the dust cover is in contact with the cross shaft, the oil seal and the wing-shaped bearing, and effectively blocks the entry of foreign matter, the three lips of the oil seal are all on the same shoulder, the structure is compactly arranged, and the sealing effect is good. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a schematic diagram of the prior art structure;
[0010] Figure 2It is a schematic diagram of the structure of the utility model;
[0011] Figure 3 It is a partial enlarged view of A;
[0012] Figure 4 It is a schematic diagram of the cross-sectional structure of the oil seal;
[0013] Figure 5 It is a schematic diagram of the cross-sectional structure of the dust cover.
[0014] Explanation of reference numerals: wing-shaped bearing 1 , oil seal 2 , frame I 21 , rubber body I 22 , dust cover 3 , frame II 31 , rubber body II 32 , cross shaft 4 , shaft cup 5 . DETAILED DESCRIPTION
[0015] The utility model is further described below in conjunction with the accompanying drawings:
[0016] like Figure 2-5 As shown, the airfoil universal joint assembly of this sealing structure includes an airfoil bearing 1 and a cross shaft 4. The airfoil bearing 1 is assembled on the journal of the cross shaft 4. A sealing structure is provided between the airfoil bearing 1 and the cross shaft 4. The sealing structure consists of an oil seal 2 and a dust cover 3. The oil seal 2 is in contact with the dust cover 3. The oil seal 2 is located between the longitudinal contact between the airfoil bearing 1 and the journal. The oil seal 2 consists of a skeleton Ⅰ21 and a rubber body Ⅰ22. The skeleton Ⅰ21 is in close contact with the inner side of the airfoil bearing 1. The rubber body Ⅰ22 is provided with three lips. The three lips are in interference fit with the same step shoulder of the journal of the cross shaft 4, thereby ensuring a better sealing effect between the cross shaft 4 and the oil seal 2.
[0017] The dust cover 3 is located between the axial contact between the airfoil bearing 1 and the journal. The cross section of the dust cover 3 is in the shape of "3". The dust cover 3 is composed of a skeleton Ⅱ31 and a rubber body Ⅱ32. The rubber body Ⅱ32 is wrapped outside the skeleton Ⅱ31. During assembly, the outer diameter of the rubber body Ⅱ32 is interference fit with the mouth of the airfoil bearing 1, the middle of the rubber body Ⅱ32 is tightly fitted with the skeleton Ⅰ21, and the inner circle of the rubber body Ⅱ32 is interference fit with the cross shaft 4. The dust cover 3 is in close contact with the airfoil bearing 1, the cross shaft 4 and the oil seal 2 at the same time, achieving the purpose of full sealing.
[0018] The structure of the utility model effectively improves the sealing performance, stores lubricating grease, prolongs the service life, and can prevent the entry of foreign impurities such as mud, water, dust, etc., and can adapt to more severe working conditions.
[0019] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.
Claims
1. An airfoil universal joint assembly with a sealed structure, comprising an airfoil bearing (1) and a cross shaft (4), characterized in that: The wing-shaped bearing (1) is mounted on the journal of a cross shaft (4). A sealing structure is provided between the wing-shaped bearing (1) and the cross shaft (4). The sealing structure is composed of an oil seal (2) and a dust cover (3). The oil seal (2) and the dust cover (3) are in contact with each other. The oil seal (2) is located between the longitudinal contact portion of the wing-shaped bearing (1) and the journal, and the dust cover (3) is located between the axial contact portion of the wing-shaped bearing (1) and the journal.
2. The airfoil universal joint assembly of the sealing structure according to claim 1 is characterized by: The oil seal (2) is composed of a skeleton I (21) and a rubber body I (22). The skeleton I (21) is in close contact with the inner side of the wing-shaped bearing (1). The rubber body I (22) is provided with three lips, which are interference-fitted with the same step shoulder of the journal of the cross shaft (4).
3. The airfoil universal joint assembly of the sealing structure according to claim 1 or 2, characterized in that: The dust cover (3) is composed of a skeleton II (31) and a rubber body II (32). The rubber body II (32) is wrapped around the skeleton II (31). The outer circumference of the rubber body II (32) is interference fit with the mouth of the wing-shaped bearing (1). The middle of the rubber body II (32) is tightly fitted with the skeleton I (21). The inner circle of the rubber body II (32) is interference fit with the cross shaft.
4. The airfoil universal joint assembly of the sealing structure according to claim 3 is characterized by: The cross section of the dust cover (3) is in the shape of a "3".