A shockproof drive shaft dust cover

Abstract

This utility model provides a dust cover for a drive shaft to prevent impacts, including a dust cover body. The dust cover body includes a first end, a bellows section, and a second end, which are coaxially arranged. The first end and the second end are respectively located at both ends of the bellows section. The inner diameter of the first end is larger than that of the second end. The inner diameter of the troughs on the bellows section decreases sequentially from the first end side to the second end side. A tapered ring is provided circumferentially at the connection between the first end and the bellows section, and the inner diameter of the tapered ring increases sequentially from the first end side to the bellows section side. Multiple annular protective edges are evenly provided on the outer circumferential wall of the tapered ring. The beneficial effects of this utility model are: the multiple annular protective edges on the outer circumferential side of the tapered ring at the connection between the first end and the bellows section enhance the impact resistance of the tapered ring, effectively preventing the dust cover body from being damaged or cracked at the tapered ring, thereby effectively improving the service life of the dust cover.

Description

Technical Field

[0001] This utility model belongs to the technical field of drive shaft and constant velocity universal joint connection technology, and in particular relates to a dust cover for a drive shaft that is resistant to impacts. Background Technology

[0002] A dust cover connects the vehicle's drive shaft and constant velocity joint (CV joint) to protect the connection structure from dust. However, during installation with the vehicle's wheel hub, this component is prone to slipping from the operator's hands and falling to the ground or workbench. Because the CV joint's cross-sectional dimensions are larger than the drive shaft's, the CV joint end face of the dust cover will directly impact the ground or workbench upon impact. This impact can cause the internal CV joint to break or crack the dust cover at this point, necessitating replacement and impacting installation efficiency. Utility Model Content

[0003] In view of this, the present invention aims to overcome the shortcomings of the above-mentioned problems in the prior art and proposes a dust cover for a drive shaft that is resistant to impacts.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A dust cover for a drive shaft designed to prevent collisions includes a dust cover body. The dust cover body includes a first end, a bellows section, and a second end, which are coaxially arranged. The first end and the second end are respectively located at both ends of the bellows section. The inner diameter of the first end is larger than that of the second end. The inner diameter of the troughs on the bellows section decreases sequentially from the first end side to the second end side. A tapered ring is provided circumferentially at the connection between the first end and the bellows section, and the inner diameter of the tapered ring increases sequentially from the first end side to the bellows section side. Multiple annular protective edges are uniformly provided on the outer circumferential wall of the tapered ring.

[0006] Furthermore, the first end, the bellows section, the second end, the tapered ring section, and the protective edge are integrally formed.

[0007] Furthermore, the dust cover itself is made of rubber and plastic.

[0008] Furthermore, the first end has an annular first limiting groove on its outer circumferential wall, and the second end has an annular second limiting groove on its outer circumferential wall.

[0009] Furthermore, the first end has an annular first protrusion on its circumferential inner sidewall, and the second end has an annular second protrusion on its circumferential inner sidewall.

[0010] Furthermore, the tapered ring is located at the outermost crest of the bellows section, and the inner diameter of the first end is smaller than that of the tapered ring. A buffer cavity is formed between the first end, the tapered ring, and the outermost inclined section of the bellows section, and an annular protective pad is fixed to the bottom sidewall of the buffer cavity.

[0011] Furthermore, the protective pad includes a base and raised edges. The outer wall of the base is fixed to the bottom side wall of the buffer cavity. Multiple raised edges are spaced apart on the inner side wall of the base. There are raised edges corresponding to the root of the protective edge, and there are also raised edges corresponding to the corners in the buffer cavity away from the first end.

[0012] Furthermore, the protective pad is fixed to the buffer cavity with an adhesive.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] The dust cover for the drive shaft described in this utility model is designed as a bellows structure, with a bellows section in the middle and a first end and a second end at the two ends. The first end is a large port and the second end is a small port. The first end is connected to the metal shell of the constant velocity universal joint, and the second end is connected to the drive shaft. This allows the dust cover to protect the connection structure between the constant velocity universal joint and the drive shaft from dust. Multiple annular protective edges are provided on the outer circumference of the tapered ring at the connection between the first end and the bellows section to enhance the impact resistance of the tapered ring and effectively prevent the dust cover from being damaged or cracked at the tapered ring, thereby effectively improving the service life of the dust cover. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0016] Figure 1 This is a schematic diagram of the anti-collision drive shaft dust cover structure described in an embodiment of the present utility model;

[0017] Figure 2 This is a cross-sectional view of the anti-collision drive shaft dust cover structure described in an embodiment of the present utility model;

[0018] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Dust cover body; 11. First end; 12. Corrugated section; 13. Second end; 14. Conical ring section; 15. Protective edge; 16. First limiting groove; 17. Second limiting groove; 18. First protrusion; 19. Second protrusion; 110. Crest; 111. Valley; 2. Protective pad; 21. Base; 22. Protruding edge. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] As shown in the figure, a dust cover for a drive shaft that prevents collisions includes a dust cover body 1. The dust cover body 1 includes a first end 11, a bellows section 12, and a second end 13 coaxially arranged. The first end 11 and the second end 13 are respectively disposed at both ends of the bellows section 12. The inner diameter of the first end 11 is larger than that of the second end 13. The inner diameter of the troughs 111 on the bellows section 12 decreases sequentially from the first end 11 side to the second end 13 side. A tapered ring section 14 is provided circumferentially at the connection between the first end 11 and the bellows section 12. The inner diameter of the tapered ring section 14 increases sequentially from the first end 11 side to the bellows section 12 side. A plurality of annular protective edges 15 are uniformly provided on the outer circumferential wall of the tapered ring section 14. In this embodiment, the dust cover body 1 is configured as a bellows structure, with a bellows section 12 in the middle and a first end 11 and a second end 13 at the two ends. The first end 11 is configured as a large port, and the second end 13 is configured as a small port. The first end 11 is connected to the metal housing of the constant velocity joint, and the second end 13 is connected to the drive shaft. This achieves dust protection for the connection structure between the constant velocity joint and the drive shaft by the dust cover body 1. When the assembled structure of the dust cover body 1, drive shaft, and constant velocity joint is assembled onto the vehicle wheel hub, it is easy for the dust cover body 1 to be accidentally dropped by the operator. If the dust cover slips and falls onto the ground or operating table, the conical ring 14 of the dust cover body 1 will directly contact the ground or operating table and be impacted because the cross-sectional size of the constant velocity universal joint is larger than that of the drive shaft. As a result, the conical ring 14 will be broken under the action of the internal constant velocity universal joint. Therefore, multiple annular protective edges 15 are provided on the outer circumference of the conical ring 14 at the connection between the first end 11 and the bellows section 12 to enhance the impact resistance of the conical ring 14 and effectively prevent the dust cover body 1 from being broken or cracked at the conical ring 14, thereby effectively improving the service life of the dust cover.

[0028] The first end 11, the corrugated pipe section 12, the second end 13, the conical ring section 14, and the protective edge 15 are integrally formed. In this embodiment, the dust cover body 1 is set to be seamless, which can effectively prevent dust, water vapor, oil stains and other substances from seeping in due to assembly gaps in the split structure, thereby effectively protecting the internal mechanical parts of the dust cover body 1 from wear and corrosion, and extending the service life of the internal mechanical parts of the dust cover body 1.

[0029] The dust cover body 1 is made of rubber and plastic.

[0030] The first end 11 has an annular first limiting groove 16 on its outer circumferential side wall, and the second end 13 has an annular second limiting groove 17 on its outer circumferential side wall. In use, the first end 11 is sleeved on the outside of the metal housing of the constant velocity universal joint, and the second end 13 is sleeved on the outside of the drive shaft. The first end 11 and the constant velocity universal joint, as well as the second end 13 and the drive shaft, are clamped together in the first limiting groove 16 and the second limiting groove 17 by clamps.

[0031] The first end 11 has an annular first protrusion 18 on its inner circumferential sidewall, and the second end 13 has an annular second protrusion 19 on its inner circumferential sidewall. In this embodiment, the first protrusion 18, the second protrusion 19 and the dust cover body 1 are integrally formed. When the dust cover body 1 is assembled with the constant velocity universal joint and the drive shaft, the first protrusion 18 increases the sealing between the first end 11 and the constant velocity universal joint, and the second protrusion 19 increases the sealing between the second end 13 and the drive shaft.

[0032] The conical ring 14 is located at the outermost crest 110 of the bellows section 12. The inner diameter of the first end 11 is smaller than the inner diameter of the conical ring 14. A buffer cavity is formed between the first end 11, the conical ring 14 and the outermost inclined section of the bellows section 12. An annular protective pad 2 is fixedly attached to the bottom sidewall of the buffer cavity.

[0033] The protective pad 2 includes a base 21 and raised edges 22. The outer wall of the base 21 is fixedly connected to the bottom side wall of the buffer cavity. Multiple raised edges 22 are spaced apart on the inner side wall of the base 21. Each protective edge 15 has a corresponding raised edge 22 at its root, and a corresponding raised edge 22 is also provided at the corner of the buffer cavity away from the first end 11. In this embodiment, the protective pad 2 is a one-piece molded structure, and the material is also rubber and plastic. In this embodiment, when the conical ring 14 is impacted by an external force, the protective pad 2 and the metal shell of the constant velocity universal joint will be squeezed and collided. The protrusions 22 are spaced on the inner sidewall of the base 21, which allows the protrusions 22 to have deformation space to disperse stress when they are deformed by the squeeze and collision. Furthermore, the protrusions 22 are provided at the root of the protective edge 15, which is equivalent to thickening the root of the protective edge 15, further improving the impact resistance of the conical ring 14. In addition, the protrusions 22 are also provided at the corner of the buffer cavity away from the first end 11. That is, the protective pad 2 is bent at the corner, and the protective pad 2 is limited by the corner to ensure that the protective pad 2 will not detach from the bottom sidewall of the buffer cavity.

[0034] The protective pad 2 is fixed to the buffer cavity by an adhesive. In this embodiment, the adhesive is a special rubber and plastic adhesive, such as H-1207 non-whitening instant adhesive.

[0035] In this embodiment, both the dust cover body 1 and the protective pad 2 are made of rubber and plastic. Rubber and plastic have advantages in lightweight and installation adaptability. Their low density significantly reduces the overall weight of the dust cover body 1 compared to metal, reducing the load pressure on the installation parts of the protected equipment and preventing deformation or loosening of the installation structure due to long-term use. At the same time, rubber and plastic have a certain degree of flexibility and high fit, improving dustproof sealing. Rubber and plastic themselves have a dense structure, smooth surface and no pores, which can effectively prevent dust. In addition, rubber and plastic have a certain degree of impact and wear resistance, which can buffer external collisions or impacts on the internal mechanical parts of the dust cover body 1, avoiding scratches or damage to the surface of the internal mechanical parts of the dust cover body 1. Furthermore, rubber and plastic have excellent weather resistance and a wide temperature tolerance range. They are not prone to cracking, softening or deformation in high and low temperature environments. They have strong chemical stability and are not easily corroded by acids, alkalis, oils and other corrosive substances. They will not oxidize and age due to long-term exposure to air, resulting in a long service life and no need for frequent replacement.

[0036] The working process of this embodiment is as follows:

[0037] The first end 11 is fitted onto the metal housing of the constant velocity universal joint, and the metal housing of the constant velocity universal joint extends into the inner end of the first end 11 or into the buffer cavity, and the first end 11 is fixed tightly by a clamp; similarly, the second end 13 is fitted onto the drive shaft and fixed tightly by a clamp. When the assembled structure of the dust cover body 1, drive shaft, and constant velocity joint is assembled onto the vehicle wheel hub, it is easy for it to slip from the operator's hands and fall to the ground or operating table. At this time, since the cross-sectional size of the constant velocity joint is larger than that of the drive shaft, the conical ring 14 of the dust cover body 1 will directly contact the ground or operating table after falling and be impacted. As a result, the conical ring 14 will be broken under the action of the internal constant velocity joint. Therefore, multiple annular protective edges 15 are provided on the outer circumference of the conical ring 14 at the connection between the first end 11 and the bellows section 12, and a protective pad 2 is provided in the buffer cavity. The protective pad 2 is provided with multiple raised edges 22 to enhance the impact resistance of the conical ring 14 and effectively prevent the dust cover body 1 from being broken by the pad at the conical ring 14, thereby effectively improving the service life of the dust cover.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A dust cover for a drive shaft to prevent impacts, characterized in that: The dust cover body includes a first end, a corrugated pipe section, and a second end, which are coaxially arranged. The first end and the second end are respectively located at both ends of the corrugated pipe section. The inner diameter of the first end is larger than that of the second end. The inner diameter of the troughs on the corrugated pipe section decreases sequentially from the first end side to the second end side. A tapered ring section is provided circumferentially at the connection between the first end and the corrugated pipe section. The inner diameter of the tapered ring section increases sequentially from the first end side to the corrugated pipe section side. Multiple annular protective edges are uniformly provided on the outer circumferential wall of the tapered ring section.

2. The anti-collision dust cover for a drive shaft according to claim 1, characterized in that: The first end, the bellows section, the second end, the tapered ring section, and the protective edge are integrally molded structures.

3. The anti-collision dust cover for a drive shaft according to claim 1, characterized in that: The dust cover is made of rubber and plastic.

4. The anti-collision dust cover for a drive shaft according to claim 1, characterized in that: The first end has an annular first limiting groove on its outer circumferential wall, and the second end has an annular second limiting groove on its outer circumferential wall.

5. The anti-collision dust cover for a drive shaft according to claim 1, characterized in that: The first end has an annular first protrusion on its inner circumferential sidewall, and the second end has an annular second protrusion on its inner circumferential sidewall.

6. The anti-collision dust cover for a drive shaft according to claim 4, characterized in that: The conical ring is located at the outermost crest of the bellows section. The inner diameter of the first end is smaller than that of the conical ring. A buffer cavity is formed between the first end, the conical ring, and the outermost inclined section of the bellows section. An annular protective pad is fixed to the bottom sidewall of the buffer cavity.

7. A dust cover for an anti-collision drive shaft according to claim 6, characterized in that: The protective pad includes a base and raised edges. The outer wall of the base is fixed to the bottom side wall of the buffer cavity. Multiple raised edges are spaced apart on the inner side wall of the base. There is a raised edge corresponding to the root of the protective edge, and there is also a raised edge corresponding to the corner in the buffer cavity away from the first end.

8. The anti-collision dust cover for a drive shaft according to claim 7, characterized in that: The protective pad is fixed to the buffer cavity with adhesive.

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