Spherical shell wheel dust cover easy to install and capable of preventing falling off

Abstract

The invention provides an easy-to-install and anti-falling spherical shell wheel dust cover which comprises a main body, the main body sequentially comprises a small opening section, a corrugated cylinder section, a connecting section and a large opening section, a large opening end connecting part is arranged between the corrugated cylinder section and the connecting section, and a small opening end connecting part is arranged between the corrugated cylinder section and the small opening section; the corrugated cylinder section comprises a plurality of wave crest structures and a plurality of wave trough structures, each wave trough structure comprises an arc-shaped part, and protruding parts are formed at the joints of wave trough surfaces and wave crest surfaces on the two sides of each arc-shaped part; a positioning frame body is arranged on the inner wall of the connecting section, a roller positioning structure and a female part end positioning structure are arranged on the positioning frame body, the roller positioning structure is provided with a roller positioning face, and the female part end positioning structure is provided with a female part end positioning face. The roller positioning structure is matched with the roller while the female part end positioning structure and the female part end face are used for positioning, installation is easy, sealing is reliable after installation and use, the structural stability is good, and the service life of the dustproof cover is effectively prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of dust covers, and in particular relates to a spherical shell wheel dust cover which is easy to install and prevents from falling off. Background Art

[0002] The drive shaft is connected between the gearbox and the wheel of the motor vehicle. The drive shaft includes a fixed end and a telescopic end. The end connected to the gearbox is the telescopic end, and the end connected to the wheel hub is the fixed end. The telescopic end of the drive shaft includes an input shaft, an output shaft, and a drive shaft joint connecting the input shaft and the output shaft. The drive shaft joint includes a female part located at the end of the input shaft and a male part located at the end of the output shaft.

[0003] The female part at the end of the input shaft includes a housing, which can be a three-column groove housing. The male part at the end of the output shaft includes a rolling bearing, which is suitable for being inserted into the housing through the open end of the housing of the female part. Power is transmitted from the engine or motor to the gear transmission, transmitted to the input shaft and the female part through the gear transmission, and then transmitted to the male part by the female part. The female part and the male part rotate at the same speed. The male part can also slide axially and swing angularly in the female part. When the male part slides relative to the female part, the rolling bearing of the male part rolls. The rolling bearing included in the male part at the end of the output shaft includes a plurality of wheel-shaped rollers, usually 3 wheel-shaped rollers. The function of the dust cover is to protect the drive shaft joint from the intrusion of mud, water, gray sand or any other contaminants, forming a closed space so that the grease does not leak out in its space, thereby fully lubricating the operation between the bearing and the housing.

[0004] Traditional dust covers have complex structures, large volumes and masses, large internal stresses, and are prone to deformation during use, have short service lives, and high manufacturing costs. For example, the anti-slip dust cover and transmission assembly for drive shaft universal joints disclosed in Chinese patent publication number CN211175095U are our company's previous generation products. Although the defects of the above-mentioned traditional dust covers were solved at the beginning of the design, it was found during the mass production process that during actual production and assembly, the limiting structure needs to be inserted into the mother part. During this process, the limiting structure is prone to press against the roller that is not aligned, resulting in incomplete assembly. In addition, the wedge-shaped limiting structure is easily bent when inserted into the mother part during installation, which greatly affects the structural stability and sealing of the dust cover. Therefore, it is necessary to improve the existing dust cover structure. Summary of the invention

[0005] In view of this, the invention aims to overcome the defects in the prior art and proposes a spherical shell wheel dust cover that is easy to install and prevents from falling off.

[0006] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0007] An easy-to-install anti-falling spherical shell wheel dust cover comprises a main body, which comprises a small opening section, a corrugated cylinder section, a connecting section and a large opening section in sequence, wherein the inner diameter of the small opening section is smaller than the inner diameter of the large opening section, the small opening section is fixed on the output shaft, the large opening section is fixed on the mother part, and the outer diameter of the corrugated cylinder section gradually decreases from the large opening section side to the small opening section side;

[0008] A large opening end connecting portion is provided between the corrugated cylinder section and the connecting section, and a small opening end connecting portion is provided between the corrugated cylinder section and the small opening section; the corrugated cylinder section includes a plurality of crest structures, crest surfaces are formed on both sides of each crest structure, and a trough structure is formed between two adjacent crest structures, and the trough structure includes an arc portion, and a convex portion is formed at the connection between the trough surfaces and the crest surfaces on both sides of the arc portion;

[0009] A positioning frame is provided on the inner wall of the connecting section, on which a roller positioning structure and a mother component end positioning structure are provided, the roller positioning structure is provided with a roller positioning surface, and the mother component end positioning structure is provided with a mother component end positioning surface facing the large opening section.

[0010] Furthermore, a groove is provided on the outer wall of the large opening section.

[0011] Furthermore, a groove is provided on the outer wall of the small opening section.

[0012] Furthermore, the mother component end positioning structure includes a ring frame and a support portion arranged between the ring frame and the inner wall of the connecting section. Each support portion faces an end surface of the large opening section and together with the end surface of the ring frame facing the large opening section constitutes a mother component end positioning surface.

[0013] Furthermore, the roller positioning structure comprises a plurality of seat plates obliquely arranged on the inner wall of the ring frame, and an arc-shaped roller positioning surface is provided on the seat plates.

[0014] Furthermore, each of the seat plates is evenly distributed relative to the outer circumference of the connecting portion.

[0015] Furthermore, the support portion includes three legs arranged corresponding to the roller positioning structure, and the angle between two adjacent legs is an acute angle.

[0016] Furthermore, the wall thickness of the connecting portion at the small opening end gradually increases from the corrugated cylinder section side to the small opening section side.

[0017] Furthermore, the inner wall of the large opening section and the inner wall of the small opening section are respectively provided with at least one annular convex ridge.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The invention has a reasonable structural design. When assembled and applied, the small opening section is fixed on the output shaft, and the large opening section is fixed on the mother part. The mother part end positioning structure on the positioning frame is used to form a positioning with the mother part end face, and the roller positioning structure cooperates with the roller, which is easy to install. After installation and use, the seal is reliable and the structure is stable. In addition, during the expansion and contraction of the dust cover body, the corrugated cylinder section and the large opening section, as well as the corrugated cylinder section and the small opening section, are transitioned through the connecting section to avoid stress concentration. At the same time, the trough structure position is contacted by the raised parts on both sides of the arc-shaped part of the trough, which avoids stress concentration in the trough structure and effectively extends the service life of the dust cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 A schematic diagram of the structure created by the present invention;

[0022] Figure 2 for Figure 1 Right view;

[0023] Figure 3 A cross-sectional view created for the present invention;

[0024] Figure 4 A schematic diagram of the trough structure portion in the present invention;

[0025] Figure 5 A schematic diagram of the three-dimensional structure created by the present invention;

[0026] Figure 6 A schematic diagram of a three-dimensional structure from another angle is created for the present invention;

[0027] Figure 7 A schematic diagram of the present invention when it is installed and used;

[0028] Figure 8 for Figure 7 A cross-sectional view of

[0029] Fig. 9 It is a schematic diagram of the dust cover installation structure part in the invention. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying 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 a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 invention can be understood according to specific circumstances.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0034] A spherical shell wheel dust cover that is easy to install and prevent from falling off, such as Figures 1 to 9 As shown, it includes a main body, which includes a small opening section 1, a corrugated cylinder section 2, a connecting section 3 and a large opening section 4 in sequence. The inner diameter of the small opening section is smaller than that of the large opening section. The small opening section is fixed on the output shaft 24, and the large opening section is fixed on the mother piece 23. The outer diameter of the corrugated cylinder section gradually decreases from the large opening section side to the small opening section side; a large opening end connecting portion 5 is provided between the corrugated cylinder section and the connecting section, and a small opening end connecting portion 6 is provided between the corrugated cylinder section and the small opening section.

[0035] The wall thickness of the connecting portion at the small opening end gradually increases from the side of the corrugated cylinder section to the side of the small opening section, which ensures that the corrugated cylinder section can expand and contract freely, while also improving the structural stability between the corrugated cylinder and the large opening section and the small opening section, avoiding stress concentration at various connecting parts and premature damage, and extending the service life of the dust cover.

[0036] The corrugated cylinder section includes a plurality of peak structures 7, each of which has peak surfaces 8 formed on both sides, and a trough structure 9 formed between two adjacent peak structures. The trough structure is an arc-shaped portion as a whole, and the trough surfaces 10 on both sides of the arc-shaped portion are connected with the peak surfaces to form a convex portion 11. When the dust cover shrinks, the convex portions on both sides of the trough structure contact, and the trough structure can still maintain the arc structure, thereby avoiding stress concentration at the trough structure position and extending the service life of the dust cover.

[0037] A positioning frame is provided on the inner wall of the connecting section, on which a roller positioning structure 12 and a mother component end positioning structure 13 are provided, on which a roller positioning structure is provided with a roller positioning surface 14, and on which a mother component end positioning structure is provided with a mother component end positioning surface 15 facing the large opening section. The mother component end positioning structure includes a ring frame 16 and a support portion 18 provided between the ring frame and the inner wall of the connecting section. The roller positioning structure includes a plurality of seat plates 19 obliquely arranged on the inner wall of the ring frame, on which an arc-shaped roller positioning surface is provided. The end surface of each support portion facing the large opening section, the end surface of the ring frame facing the large opening section, and the end surface of the seat plate facing the large opening section together constitute the mother component end positioning surface.

[0038] During installation and use, the mother component end positioning structure on the positioning frame forms a positioning with the mother component end face, while the roller positioning structure cooperates with the roller 25, and the positioning frame synchronously presses the mother component end face and the roller, which is very convenient for installation and will not cause the installation to be incomplete. The support part includes three legs 20 arranged corresponding to the roller positioning structure, and the angle between two adjacent legs is an acute angle, which improves the stability of the ring frame structure and also ensures the structural strength of the roller positioning structure. When used, after the roller is pressed against the roller positioning surface, the roller positioning structure will not be deformed, ensuring the structural stability of the drive shaft joint assembly. The seat plates are evenly distributed relative to the outer circumference of the connecting part, which can form a reliable limit for the roller and have high structural stability.

[0039] The outer wall of the large opening section is provided with a large opening end fixing groove 21. The outer wall of the small opening section is provided with a small opening end fixing groove 22. The inner wall of the large opening section and the inner wall of the small opening section are respectively provided with at least one annular convex ridge 17. After the large opening section is fixed to the mother component by the throat hoop set in the large opening end fixing groove, a reliable seal is formed between the convex ridge in the large opening section and the mother component. After the small opening section is fixed to the output shaft by the throat hoop set in the small opening end fixing groove, a reliable seal is formed between the convex ridge in the small opening section and the output shaft, ensuring that the lubricating oil in the dust cover will not leak, and at the same time, it also effectively prevents the intrusion of external impurities such as mud and sand.

[0040] The invention has a reasonable structural design. When assembled and applied, the small opening section is fixed on the output shaft, and the large opening section is fixed on the mother part. The mother part end positioning structure on the positioning frame is used to form a positioning with the mother part end face, and the roller positioning structure cooperates with the roller, which is easy to install. After installation and use, the seal is reliable and the structure is stable. In addition, during the expansion and contraction of the dust cover body, the corrugated cylinder section and the large opening section, as well as the corrugated cylinder section and the small opening section, are transitioned through the connecting section to avoid stress concentration. At the same time, the trough structure position is contacted by the raised parts on both sides of the arc-shaped part of the trough, which avoids stress concentration in the trough structure and effectively extends the service life of the dust cover.

[0041] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An easy-to-install anti-falling spherical shell wheel dust cover, characterized in that: The main body includes a small opening section, a corrugated tube section, a connecting section and a large opening section in sequence, the inner diameter of the small opening section is smaller than the inner diameter of the large opening section, and the outer diameter of the corrugated tube section gradually decreases from the large opening section side to the small opening section side; A large opening end connecting portion is provided between the corrugated cylinder section and the connecting section, and a small opening end connecting portion is provided between the corrugated cylinder section and the small opening section; the corrugated cylinder section includes a plurality of crest structures, crest surfaces are formed on both sides of each crest structure, and a trough structure is formed between two adjacent crest structures, and the trough structure includes an arc portion, and a convex portion is formed at the connection between the trough surfaces and the crest surfaces on both sides of the arc portion; A positioning frame is provided on the inner wall of the connecting section, on which a roller positioning structure and a mother component end positioning structure are provided, the roller positioning structure is provided with a roller positioning surface, and the mother component end positioning structure is provided with a mother component end positioning surface facing the large opening section.

2. The easy-to-install and anti-falling spherical shell wheel dust cover according to claim 1 is characterized in that: The outer wall of the large opening section is provided with a groove.

3. The easy-to-install and anti-falling spherical shell wheel dust cover according to claim 1 is characterized in that: The outer wall of the small opening section is provided with a groove.

4. The easy-to-install and anti-falling spherical shell wheel dust cover according to claim 1 is characterized in that: The mother component end positioning structure includes a ring frame and a support portion arranged between the ring frame and the inner wall of the connecting section. Each support portion faces an end surface of the large opening section and together with the end surface of the ring frame facing the large opening section constitutes a mother component end positioning surface.

5. The easy-to-install and anti-falling spherical wheel dust cover according to claim 4, characterized in that: The roller positioning structure comprises a plurality of seat plates which are arranged obliquely on the inner wall of the ring frame, and arc-shaped roller positioning surfaces are arranged on the seat plates.

6. The easy-to-install and anti-falling spherical shell wheel dust cover according to claim 5, characterized in that: The seat plates are evenly distributed relative to the outer circumference of the connecting portion.

7. The easy-to-install and anti-falling spherical shell wheel dust cover according to claim 4, characterized in that: The support portion comprises three legs arranged corresponding to the roller positioning structure, and the angle between two adjacent legs is an acute angle.

8. The easy-to-install and anti-falling spherical wheel dust cover according to claim 1, characterized in that: The wall thickness of the small opening end connecting portion gradually increases from the corrugated cylinder section side to the small opening section side.

9. The easy-to-install and anti-falling spherical wheel dust cover according to claim 1, characterized in that: The inner wall of the large opening section and the inner wall of the small opening section are respectively provided with at least one annular convex ridge.

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