Dustproof cover for hub bearing unit
By using an integrated end face and inner diameter mating structure, combined with a boss interference fit and an oil seal clearance groove, the structure of the dust cover has been optimized, solving the complexity and disassembly difficulties of existing dust covers, and achieving compactness, lightweight and convenience.
Patent Information
- Application Number
- CN202421193587.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-28
AI Technical Summary
Existing dustproof end caps are complex in structure, heavy in weight, and costly. They are also difficult to disassemble and assemble, and their dustproof effect is generally poor, making it difficult to meet the requirements of compactness and ease of maintenance.
An integrally molded end face mating part and inner diameter mating part are designed, which are connected by a rounded transition, combined with a boss interference fit and an oil seal clearance groove. The structure is optimized to improve dustproofness and sealing performance, and the handle facilitates disassembly and assembly.
The dust cover achieves a compact and lightweight design, reduces costs, improves dust protection and connection reliability, and enhances ease of installation and removal.
Smart Images
Figure CN222334290U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearing dust covers, in particular to a dust cover for a hub bearing unit. Background Art
[0002] The dust cover is one of the key components at the wheel hub bearing position. Its main function is to prevent external dust and impurities from entering the bearing, thereby ensuring the best use of the bearing and extending its service life.
[0003] The common dustproof end covers in the prior art mainly have the following problems: the distance between the end face and the bearing is large, and the dustproof effect is average; the entire end cover is thick, and a large number of array structures are designed, which are complex in structure, heavy in weight, and high in manufacturing cost; the end cover is installed in conjunction with the outer diameter of the bearing outer ring, and once the end cover is deformed, it will cause assembly difficulties; disassembly and assembly are relatively difficult, and maintenance convenience is poor. Utility Model Content
[0004] How to optimize the dust cover structure, improve the compactness and dustproofness of the dust cover, and reduce its weight and cost is a difficulty that needs to be solved. At the same time, improving installation reliability and disassembly convenience also needs to be considered. Therefore, based on these problems, the utility model designs a dust cover for a hub bearing unit with good dustproof performance, compact structure, low cost, and convenient maintenance.
[0005] The utility model is realized through the following technical scheme: a dust cover for a hub bearing unit, comprising an end face fitting part and an inner diameter fitting part formed in one piece, wherein the end face fitting part is mainly used for dust prevention, and the inner diameter fitting part is used for connecting with the hub bearing unit.
[0006] In order to improve the rationality of the structure and reduce the overall weight, and at the same time improve the compactness of the structure, the end face matching part is vertically arranged with the inner diameter matching part and transitioned by a circular arc, and the wall thickness of the end face matching part and the inner diameter matching part are consistent. The end face matching part matches the end face shape of the hub bearing unit, and has a dustproof part and an end face shape matching part, and the dustproof part is arranged correspondingly to the oil seal in the hub bearing unit.
[0007] In order to further optimize the structure and improve the dustproof performance and sealing performance, the dustproof part is fitted with the end face of the hub bearing unit, and an oil seal avoidance groove is opened on the side of the dustproof part close to the oil seal in the hub bearing unit to ensure the best use environment of the oil seal.
[0008] The outer diameter surface of the inner diameter matching part is provided with a plurality of bosses, and the inner diameter matching part and the inner diameter of the hub bearing unit are interference-fitted through the bosses, so that a stable and reliable connection between the dust cover and the hub bearing unit can be achieved.
[0009] In order to ensure connection reliability, preferably, the plurality of bosses are evenly distributed.
[0010] In order to facilitate picking up and disassembly and improve maintenance convenience, a handle is fixedly connected to the inner diameter surface of the inner diameter matching part.
[0011] The beneficial effects of the utility model are as follows: the dust cover for the hub bearing unit improves the rationality and compactness of the dust cover structure, reduces the weight, and thus reduces the cost by designing an integrally formed end face matching portion and an inner diameter matching portion whose outer shape matches the hub bearing unit; improves the dustproofness and sealing properties by optimizing the structure of the end face matching portion; improves the connection reliability by optimizing the connection structure with the hub bearing unit; in addition, the dust cover for the hub bearing unit is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic structural diagram of a dust cover for a hub bearing unit of the utility model;
[0013] Figure 2 It is a schematic diagram of the structure in which the dust cover of the wheel hub bearing unit of the utility model is installed on the wheel hub bearing unit;
[0014] Figure 3 yes Figure 2 A local enlarged view of point A;
[0015] In the figure: 1. end face matching part; 11. dustproof part; 111. oil seal avoidance groove; 12. end face shape matching part; 2. inner diameter matching part; 21. boss; 22. handle; 9. wheel hub bearing unit; 10. oil seal. DETAILED DESCRIPTION
[0016] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0017] like Figure 1-3 A dust cover for a hub bearing unit is shown, comprising an end face fitting portion 1 and an inner diameter fitting portion 2 which are integrally formed and have the same wall thickness. The end face fitting portion 1 is vertically arranged to the inner diameter fitting portion 2 and transitioned through a circular arc. The end face fitting portion 1 matches the end face shape of the hub bearing unit 9, and has a dustproof portion 11 and an end face shape fitting portion 12. The dustproof portion 11 is arranged corresponding to the oil seal 10 in the hub bearing unit 9. The dustproof portion 11 is fitted with the end face of the hub bearing unit 9, and an oil seal avoidance groove 111 is provided on the side of the dustproof portion 11 close to the oil seal 10 in the hub bearing unit 9.
[0018] The outer diameter surface of the inner diameter matching part 2 is provided with a plurality of evenly distributed bosses 21 , and the inner diameter matching part 2 and the inner diameter of the hub bearing unit 9 are interference fit through the bosses 21 , and a handle 22 is fixedly connected to the inner diameter surface of the inner diameter matching part 2 .
[0019] During assembly, the hub bearing unit is pressed onto the outer end face of the hub bearing unit 9 with a dust cover using a press machine and a press-fitting tool. The inner diameter matching part 2 is interference fit with the inner diameter of the hub bearing unit 9 through the boss 21, and the dustproof part 11 is in contact with the outer end face of the hub bearing unit 9.
[0020] During use, the dust cover for the entire hub bearing unit is tightly fitted to the hub bearing unit 9, which can effectively prevent the entry of external impurities such as mud, water, sand and dust, and ensure good lubrication, operating environment and service life of the bearing, thereby ensuring the stability and reliability of the operation of the entire mechanism. When disassembly and replacement are required, the dust cover for the entire hub bearing unit can be easily removed by simply clamping the handle 22 with a disassembly tool, which is convenient for maintenance.
[0021] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.
[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0023] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set", "provided with", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0025] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A dust cover for a hub bearing unit, characterized in that: It includes an integrally formed end face matching part and an inner diameter matching part, the end face matching part is vertically arranged with the inner diameter matching part and transitioned by a circular arc, the end face matching part matches the end face shape of the hub bearing unit, has a dustproof part and an end face shape matching part, the dustproof part is arranged corresponding to the oil seal in the hub bearing unit, the outer diameter surface of the inner diameter matching part is provided with a plurality of bosses, the inner diameter matching part is interference fit with the inner diameter of the hub bearing unit through the bosses, and a handle is fixedly connected to the inner diameter surface of the inner diameter matching part.
2. The dust cover for a hub bearing unit according to claim 1, characterized in that: The dustproof part is fitted with the end surface of the hub bearing unit, and an oil seal avoidance groove is provided on one side of the dustproof part close to the oil seal in the hub bearing unit.
3. The dust cover for a hub bearing unit according to claim 1, characterized in that: The plurality of bosses are evenly distributed.
4. The dust cover for a hub bearing unit according to claim 1, characterized in that: The wall thickness of the end face matching portion and the inner diameter matching portion are consistent.