Dust cover protective sleeve and transmission shaft assembly

Abstract

The utility model relates to a dust cover protection sleeve and a transmission shaft assembly, the dust cover protection sleeve comprises a protection sleeve body and a force application part, the protection sleeve body is a flexible part, one end of the protection sleeve body is provided with a groove, and the groove is used for being connected with a framework in a clamped mode; the protective sleeve body is of an annular structure, and an opening is formed in the annular structure. The force application part is arranged on the periphery of the protective sleeve body. The protective sleeve body is clamped at the end part of the framework through the groove, and the flexible protective sleeve body is in contact with the dust cover, so that the dust cover is prevented from being broken by the end part of the framework and the shaft rod. The opening arranged on the protective sleeve body is convenient for the shaft rod to pass through. In a limited disassembly and assembly space, an operator can realize quick disassembly of the protective sleeve body and the end part of the framework by pulling the force application part arranged at the periphery of the protective sleeve body, so that the dust cover protective sleeve is prevented from influencing the dynamic balance amount of the transmission shaft assembly in the vehicle running process, the assembly efficiency of the transmission shaft assembly can be improved, and the production cost is reduced. The dust cover protection sleeve can be recycled, and resource waste is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of automobile accessories, and in particular to a dust cover protective sleeve and a transmission shaft assembly. Background Art

[0002] In the existing automobile intermediate transmission shaft assembly, the constant velocity universal joint of the intermediate transmission shaft assembly has the function of adjusting the angle of the shaft rods at both ends. In order to prevent external dust from entering the universal joint assembly, a dust cover is usually provided on the intermediate transmission shaft assembly. When the built-in dust cover 5 is used, one end of the dust cover 5 is connected to the ball cage housing in the universal joint assembly 4 through the frame 3, and the other end of the dust cover 5 is connected to the shaft rod 6. Figure 1 During the packaging, transportation, and assembly of the transmission shaft assembly, if the angle between the shaft 6 and the frame 3 changes too much, the end of the frame 3 will collide with the dust cover 5. Since the dust cover 5 is made of rubber, and the shaft 6 and the frame 3 are made of steel, the shaft 6 and the frame 3 squeeze each other, which will exert a large pressure on the dust cover 5, which may easily cause the dust cover 5 to break and fail. Figure 2 shown.

[0003] In the prior art, in order to prevent the dust cover 5 from being broken by the frame 3 and the shaft 6, a cardboard tube 7 is set outside the shaft 6 and the dust cover 5 to prevent the end of the frame 3 from being directly pressed on the outside of the dust cover 5. Figure 3 As shown. Since the cardboard tube 7 is easy to move along the axial direction of the shaft 6, in order to ensure that the cardboard tube 7 can still effectively isolate the contact between the frame 3 and the dust cover 5 after the movement, the cardboard tube 7 needs to be designed to be long enough. After the intermediate transmission shaft assembly is assembled on the vehicle, the cardboard tube 7 needs to be removed. Since the cardboard tube 7 is long and the disassembly space formed by the various parts is limited, it will cause difficulty in disassembly and affect the assembly efficiency. Utility Model Content

[0004] One of the purposes of the present application is to provide a dust cover protective sleeve to solve the problem that the protective structure of the dust cover in the prior art is not convenient for quick disassembly and assembly, which affects the assembly efficiency; the second purpose is to provide a transmission shaft assembly.

[0005] In order to achieve the above purpose, the technical solution adopted in this application is as follows:

[0006] A dust cover protective sleeve, comprising:

[0007] The protective cover body is a flexible member, one end of which is provided with a groove, and the groove is used for clamping with the frame; the protective cover body is an annular structure, and the annular structure has an opening;

[0008] A force applying portion is arranged on the outer periphery of the protective cover body.

[0009] According to the above technical means, the protective cover body is clamped to the end of the skeleton through the groove of the protective cover body, and the flexible protective cover body is in contact with the dust cover to prevent the skeleton end and the shaft rod from breaking the dust cover when the shaft rod swings relative to the skeleton. The opening provided on the protective cover body facilitates the passage of the protective cover body through the shaft rod to achieve rapid disassembly and assembly of the dust cover protective cover. The force-applying part provided on the periphery of the protective cover body facilitates the operator to separate the protective cover body from the skeleton end by pulling the force-applying part provided on the periphery of the protective cover body in a limited disassembly and assembly space, and at the same time pull the protective cover body outward to prevent the dust cover protective cover left at the end of the skeleton from affecting the dynamic balance of the drive shaft assembly during the operation of the vehicle. Rapid disassembly and assembly of the dust cover protective cover is conducive to improving the assembly efficiency of the drive shaft assembly, and the removed dust cover protective cover can be collected and recycled multiple times to avoid waste of resources.

[0010] Furthermore, the protective cover body and the force applying portion are an integrally formed structure.

[0011] According to the above technical means, it is beneficial to increase the connection reliability between the force-applying part and the protective cover body, and avoid the situation where the force-applying part and the protective cover body are separated when the protective cover body is pulled by the force-applying part.

[0012] Furthermore, the number of the force-applying parts is one or more, and at least one of the force-applying parts is arranged opposite to the opening.

[0013] According to the above technical means, one or more force points can be formed on the outer periphery of the protective cover body to facilitate the operator to disassemble and assemble the dust cover protective cover; when at least one force applying part is arranged opposite to the opening, when the force applying part moves in a direction away from the shaft rod, it is convenient for the shaft rod to escape from the opening opposite to the force applying part.

[0014] Furthermore, the force-applying portion is protruding from the outer circumferential surface of the protective cover body, and the shape of the force-applying portion is a long strip, a semicircle or a triangle.

[0015] According to the above technical means, the force-applying part is arranged to protrude from the outer peripheral surface of the protective cover body, which makes it easy for the force-applying part to extend radially along the shaft rod, and is convenient for operators to pull the force-applying part, which is beneficial to expanding the disassembly space of the dust cover protective cover.

[0016] Furthermore, the groove is a U-shaped groove, and the width of the U-shaped groove is smaller than the wall thickness of the end of the skeleton.

[0017] According to the above technical means, the groove can be clamped on the outside of the frame end to ensure that the protective cover body will not fall off naturally before the transmission shaft assembly is assembled to the vehicle.

[0018] Furthermore, the difference between the wall thickness of the end of the skeleton and the width of the U-shaped groove is 0.3-0.8 mm.

[0019] According to the above-mentioned technical means, it can be ensured that the degree of clamping between the groove and the frame is within a reasonable range, avoiding the groove and the frame being too tightly clamped during disassembly, making it inconvenient to disassemble the dust cover protective cover; avoiding the groove and the frame being too loosely clamped, causing the dust cover protective cover to fall off naturally during packaging, transportation, and assembly, making it impossible to achieve reliable protection for the dust cover.

[0020] Furthermore, a guide surface is provided on the side wall of the groove, and the guide surface is gradually tapered along the depth direction of the groove.

[0021] According to the above technical means, the end positioning can be achieved by first contacting the guide surface with the end of the skeleton, and then the protective cover body can be squeezed along the axial direction of the shaft rod so that the end of the skeleton can be smoothly embedded in the groove, which is beneficial to improving the assembly efficiency between the protective cover body and the skeleton.

[0022] Furthermore, a first opening end surface and a second opening end surface are provided along the circumferential direction of the protective cover body, and the first opening end surface and the second opening end surface are arranged opposite to each other to form the opening.

[0023] According to the above technical means, the size of the opening can be controlled by controlling the preset gap between the first opening end face and the second opening end face, thereby preventing the opening on the protective cover body from being too large, causing the skeleton corresponding to the opening area to contact with the dust cover and damage the dust cover.

[0024] Furthermore, the first opening end surface and the second opening end surface are flat surfaces or curved surfaces.

[0025] According to the above technical means, it is convenient to contact the shaft rod or the dust cover sleeved outside the shaft rod through the first opening end surface and the second opening end surface. When the first opening end surface and the second opening end surface are curved surfaces, the curved surfaces have a guiding effect, so that the shaft rod can quickly enter or escape from the inner ring of the protective cover body through the first opening end surface and the second opening end surface.

[0026] A transmission shaft assembly includes the above-mentioned dust cover protective sleeve, and also includes a frame, a universal joint assembly, a dust cover and a shaft rod, the universal joint assembly is respectively connected to the frame and the shaft rod, the dust cover is respectively connected to the frame and the shaft rod, and the protective sleeve body is clamped with the end of the frame.

[0027] According to the above technical means, during the packaging, transportation and assembly of the transmission shaft assembly, the contact between the skeleton and the outer wall of the built-in dust cover can be isolated by the protective cover body, so as to avoid the skeleton end and the shaft rod from directly contacting the dust cover and causing the dust cover to be broken by the skeleton end and the shaft rod.

[0028] Beneficial effects of this application:

[0029] (1) The present application sets a groove, an opening and a force-applying part on the dust cover protective sleeve, which has a simple and reasonable structure, and can realize the rapid disassembly and assembly of the dust cover protective sleeve at the end of the frame, so as to avoid the dust cover protective sleeve left at the end of the frame affecting the dynamic balance of the transmission shaft assembly during the operation of the vehicle, and can improve the assembly efficiency of the transmission shaft assembly while protecting the dust cover. The removed dust cover protective sleeve can be recycled to avoid waste of resources.

[0030] (2) The groove in the present application is a U-shaped groove, and the width of the U-shaped groove is limited so that the width of the U-shaped groove is smaller than the wall thickness of the end of the skeleton. When the U-shaped groove is clamped on the end of the skeleton, the U-shaped groove is expanded, so that the inner wall of the U-shaped groove generates an elastic force on the end of the skeleton, thereby clamping the groove on the end of the skeleton. When the protective cover body needs to be disassembled, since no clamping ridges or other structures are provided in the inner wall of the U-shaped groove, the U-shaped groove and the end of the skeleton can be quickly separated by pulling the force-applying part. It can not only ensure that the degree of clamping between the groove and the skeleton is within a reasonable range, but also avoid the situation where the groove and the skeleton are clamped too tightly, and a large pulling force needs to be applied to separate the groove from the skeleton. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a transmission shaft assembly in the prior art;

[0032] Figure 2 It is a schematic diagram of the state of the transmission shaft assembly handling process in the prior art;

[0033] Figure 3 It is a schematic diagram of the protection method of the built-in dust cover in the prior art;

[0034] Figure 4 A schematic diagram of the structure of the dust cover protective sleeve provided in an embodiment of the present application;

[0035] Figure 5 A schematic diagram of the clamping connection between the dust cover protective sleeve and the end of the frame provided in the embodiment of the present application;

[0036] Figure 6 A front view of the dust cover protective sleeve provided in the embodiment of the present application Figure 1 ;

[0037] Figure 7 A front view of the dust cover protective sleeve provided in the embodiment of the present application Figure 2 ;

[0038] Figure 8 A front view of the dust cover protective sleeve provided in the embodiment of the present application Figure 3 ;

[0039] Fig. 9 A schematic cross-sectional view of a protective cover body provided in an embodiment of the present application;

[0040] Fig.10 This is a schematic diagram of the connection between the skeleton, the dust cover and the protective cover body adopted in the embodiment of the present application.

[0041] Among them, 1-protective cover body; 11-groove; 111-guide surface; 12-first opening end surface; 13-second opening end surface; 2-force applying part; 3-skeleton; 4-universal joint assembly; 5-dust cover; 6-axis rod; 7-cardboard tube. DETAILED DESCRIPTION

[0042] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.

[0043] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0044] See also Figures 1 to 10 This embodiment proposes a dust cover protective sleeve, including a protective sleeve body 1 and a force-applying part 2. The protective sleeve body 1 is a flexible member. One end of the protective sleeve body 1 is provided with a groove 11. The groove 11 is used to snap-fit ​​with the skeleton 3. The protective sleeve body 1 can be snap-fitted to the end of the skeleton 3 to cut off the direct contact between the end of the skeleton 3 and the outer wall of the built-in dust cover 5. The protective sleeve body 1 is an annular structure, which is matched with the shape of the end of the skeleton 3. The annular structure has an opening, and the annular structure can be opened from the opening. When the protective sleeve body 1 is snap-fitted to the end of the skeleton 3, the opening is opened so that the shaft 6 can pass through the opening of the protective sleeve body 1, which is convenient for snapping the protective sleeve body 1 to the skeleton 3. Figure 1 and Figure 2 shown.

[0045] The force-applying part 2 is arranged on the periphery of the protective cover body 1, which can avoid interference between the force-applying part 2 and the frame 3 or the dust cover 5. After the transmission shaft assembly is assembled on the vehicle, the rotation limit of the universal joint assembly 4 can be realized because the transmission shaft assembly is connected to other components in the vehicle, so that when the universal joint assembly 4 rotates on the vehicle, the end of the frame 3 will not come into contact with the dust cover 5. At this time, there is no need to set a dust cover protective cover at the end of the frame 3. This is because the dust cover protective cover will affect the dynamic balance of the transmission shaft assembly during the operation of the vehicle. When the dynamic balance of the transmission shaft assembly is too large, it will cause the vehicle to shake. Therefore, after the transmission shaft assembly is assembled on the vehicle, the dust cover protective cover needs to be removed in time. Since the removal space of the dust cover protective sleeve on the transmission shaft assembly is limited, it is not convenient to directly remove the protective sleeve body 1 from the end of the frame 3. The protective sleeve body 1 can be separated from the end of the frame 3 by pulling the force-applying part 2 arranged on the outer periphery of the protective sleeve body 1. At the same time, the protective sleeve body 1 is pulled outward, and the shaft 6 passes through the opening of the protective sleeve body 1 again to separate the dust cover protective sleeve from the frame 3 and the transmission shaft assembly. The removed dust cover protective sleeve can be collected and recycled for multiple times to avoid wasting resources.

[0046] It should be noted that the dust cover protective sleeve of the present application has a simple and reasonable structure, can be quickly disassembled and assembled, and is conducive to improving the assembly efficiency of the transmission shaft assembly. The protective sleeve body 1 is a flexible part. During the packaging, transportation, and assembly of the transmission shaft assembly, if the shaft 6 deflects toward the end of the skeleton 3, the protective sleeve body 1 clamped at the end of the skeleton 3 will prevent the skeleton 3 from directly contacting the dust cover 5, and when the flexible protective sleeve body 1 is pressed on the flexible dust cover 5, the dust cover 5 can be prevented from being broken, thereby preventing the dust cover 5 from being damaged and failing, which can effectively improve the service life of the transmission shaft assembly. In some preferred embodiments of the present application, the material of the protective sleeve body 1 can be rubber, silicone, or other materials.

[0047] It should be noted that, in order to avoid the situation where the force-applying part 2 is separated from the protective cover body 1 when the protective cover body 1 is pulled by the force-applying part 2, the connection between the force-applying part 2 and the protective cover body 1 is a fixed connection. Specifically, the fixed connection between the force-applying part 2 and the protective cover body 1 can be achieved by gluing, welding, etc., or by integral molding. In some preferred embodiments of the present application, the protective cover body 1 and the force-applying part 2 are an integrally molded structure, which can be made by a rubber integral casting process or a silicone integral casting process, which is beneficial to increase the connection reliability between the force-applying part 2 and the protective cover body 1.

[0048] See also Figures 6 to 8The number of the force-applying parts 2 can be one or more, and they are used to form one or more force-applying points on the outer periphery of the protective cover body 1, so that the operator can easily disassemble the dust cover protective cover. At least one force-applying part 2 is arranged opposite to the opening. When the force-applying part 2 moves in a direction away from the shaft 6, the shaft 6 is easy to escape from the opening opposite to the force-applying part 2, so that the operator can always apply force in one direction to realize the removal of the dust cover protective cover.

[0049] It should be noted that when removing the protective cover body 1, since the protective cover body 1 has the ability to deform, the force-applying part 2 can be directly pulled radially along the shaft 6; or the force-applying part 2 can be first pulled axially along the shaft 6 to separate the groove 11 from the end of the frame 3, and then the force-applying part 2 can be pulled radially along the shaft 6 to remove the protective cover body 1 from the shaft 6. However, when the force-applying part 2 is directly pulled radially along the shaft 6, since the groove 11 is clamped at the end of the frame 3, a large pulling force needs to be applied, and the pulling process may cause the protective cover body 1 to be greatly deformed or damaged. When there are multiple force-applying parts 2, such as Figure 7 and Figure 8 As shown, the force-applying parts 2 on the left and right sides of the protective cover body 1 can be pulled axially along the shaft 6 to separate the groove 11 from the end of the frame 3, and then the force-applying parts 2 at the bottom of the protective cover body 1 can be pulled radially along the shaft 6 to make the protective cover body 1 fall off the shaft 6, thereby reducing damage to the protective cover body 1.

[0050] In order to facilitate the operator to pull the force-applying part 2, the force-applying part 2 is protruded from the outer peripheral surface of the protective cover body 1. The shape of the force-applying part 2 can be a long strip, a semicircle or a triangle, which can provide a larger gripping area for the operator. Figures 6 to 8 As a preferred embodiment of the present application, the force applying part 2 is a long strip-shaped handle, which facilitates the force applying part 2 to extend radially along the shaft 6, and is conducive to expanding the disassembly space of the dust cover protective sleeve.

[0051] It should be noted that, on the one hand, in order to avoid the groove 11 and the frame 3 being too tightly connected during disassembly, a connecting ridge is usually not provided inside the groove 11; on the other hand, in order to ensure that the protective cover body 1 does not fall off naturally when the drive shaft assembly is assembled to the front of the vehicle, it is necessary to ensure that the degree of connection between the groove 11 and the frame 3 is within a reasonable range.

[0052] In order to solve the above problems, in some embodiments of the present application, please refer to Fig. 9 and Fig.10The groove 11 is a U-shaped groove, and the width of the U-shaped groove is smaller than the wall thickness of the end of the skeleton 3. When the U-shaped groove is clamped on the end of the skeleton 3, the U-shaped groove is expanded, so that the inner wall of the U-shaped groove generates elastic force on the end of the skeleton 3, so that the groove 11 is clamped on the end of the skeleton 3 and will not fall off naturally. When the protective cover body 1 needs to be disassembled, since there is no clamping ridge or other structure in the inner wall of the U-shaped groove, the U-shaped groove and the end of the skeleton 3 can be quickly separated by pulling the force-applying part 2. It can not only ensure that the degree of clamping between the groove 11 and the skeleton 3 is within a reasonable range, but also avoid that the groove 11 and the skeleton 3 are clamped too tightly. A large pulling force needs to be applied to the force-applying part 2 to separate the groove 11 from the skeleton 3.

[0053] In some embodiments of the present application, the difference between the wall thickness of the end of the frame 3 and the width of the U-shaped groove is 0.3-0.8 mm. As a preferred embodiment of the present application, the difference between the wall thickness of the end of the frame 3 and the width of the U-shaped groove is 0.5 mm, which can ensure that the degree of engagement between the groove 11 and the frame 3 is within a reasonable range, making it easy to engage and disassemble the protective cover body 1.

[0054] Since the width of the U-shaped groove is smaller than the wall thickness of the end of the frame 3, it is difficult to achieve the end positioning when the groove 11 is connected to the end of the frame 3. Therefore, in some embodiments of the present application, please refer to Fig. 9 The side wall of the groove 11 has a guide surface 111, along the depth direction of the groove 11 (i.e. Fig. 9 The guide surface 111 is gradually set. The end of the frame 3 is first contacted by the guide surface 111 to achieve end positioning, and then the protective cover body 1 is pressed along the axial direction of the shaft 6, so that the end of the frame 3 is smoothly embedded in the groove 11 along the guide surface 111, which is conducive to improving the assembly efficiency between the protective cover body 1 and the frame 3.

[0055] In order to form an opening on the annular protective cover body 1, in some embodiments of the present application, please refer to Figure 6 , Figure 7 and Figure 8 The protective cover body 1 has a first opening end face 12 and a second opening end face 13 along the circumference thereof. The first opening end face 12 and the second opening end face 13 are arranged opposite to each other to form an opening. There is a preset gap between the first opening end face 12 and the second opening end face 13. The preset gap is preferably less than 2 mm to prevent the opening on the protective cover body 1 from being too large, causing the skeleton 3 corresponding to the opening area to contact with the dust cover 5 and damage the dust cover 5.

[0056] Specifically, the first opening end surface 12 and the second opening end surface 13 are plane or curved surfaces, which are convenient for contacting the shaft rod 6 or the dust cover 5 sleeved on the outside of the shaft rod 6. When the first opening end surface 12 and the second opening end surface 13 are curved surfaces, since the curved surfaces have a guiding effect, it is convenient for the shaft rod 6 to quickly enter or escape from the inner ring of the protective cover body 1 through the first opening end surface 12 and the second opening end surface 13.

[0057] The present application also proposes a transmission shaft assembly, including the dust cover protective sleeve described in the above embodiment, and also including a frame 3, a universal joint assembly 4, a dust cover 5 and a shaft rod 6. The universal joint assembly 4 is respectively connected to the frame 3 and the shaft rod 6, so that the angle between the shaft rod 6 and the frame 3 can be changed. The dust cover 5 is respectively connected to the frame 3 and the shaft rod 6 to prevent external dust and impurities from entering the universal joint assembly 4. The protective sleeve body 1 is clamped with the end of the frame 3 to prevent the end of the frame 3 and the shaft rod 6 from directly contacting the dust cover 5 during the packaging, transportation and assembly of the transmission shaft assembly.

[0058] See also Figures 4 to 10 In some embodiments of the present application, the method of using the dust cover protective sleeve is as follows:

[0059] Step 1: After the skeleton 3, the universal joint assembly 4, the shaft 6 and the dust cover 5 are assembled, the opening of the protective cover body 1 is opened so that the distance between the first opening end surface 12 and the second opening end surface 13 is greater than the diameter of the shaft 6, and the shaft 6 passes through the opening;

[0060] Step 2: The guide surface 111 of the groove 11 is brought into contact with the end surface of the frame 3 and the protective sleeve body 1 is pressed axially along the shaft 6 to embed the end of the frame 3 into the groove 11;

[0061] Step 3: Packing, transporting or assembling the transmission shaft assembly;

[0062] Step 4: After assembling the transmission shaft assembly to the vehicle, pull the force-applying part 2 to separate the groove 11 of the protective cover body 1 from the end of the frame 3, so that the shaft 6 is disengaged from the opening, thereby separating the dust cover protective cover from the transmission shaft assembly.

[0063] The present application provides a groove 11, an opening and a force-applying portion 2 on the dust cover protective sleeve, so that the dust cover protective sleeve can be quickly disassembled and assembled at the end of the frame 3, so as to avoid the dust cover protective sleeve left at the end of the frame 3 affecting the dynamic balance of the transmission shaft assembly during the operation of the vehicle, and to protect the dust cover 5 while improving the assembly efficiency of the transmission shaft assembly. The removed dust cover protective sleeve can be recycled to avoid waste of resources.

[0064] The above embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present application is within the protection scope of the present application.

Claims

1. A dust cover protective sleeve, characterized in that: include: A protective cover body (1), the protective cover body (1) being a flexible member, one end of the protective cover body (1) being provided with a groove (11), the groove (11) being used for clamping with the frame (3); the protective cover body (1) being an annular structure, the annular structure having an opening; A force applying portion (2), wherein the force applying portion (2) is arranged on the outer periphery of the protective cover body (1).

2. The dust cover protective sleeve according to claim 1, characterized in that: The protective cover body (1) and the force-applying portion (2) are an integrally formed structure.

3. The dust cover protective sleeve according to claim 1, characterized in that: The number of the force applying parts (2) is one or more, and at least one of the force applying parts (2) is arranged opposite to the opening.

4. The dust cover protective sleeve according to claim 1, characterized in that: The force-applying portion (2) is arranged to protrude from the outer peripheral surface of the protective cover body (1), and the shape of the force-applying portion (2) is a long strip, a semicircle or a triangle.

5. The dust cover protective sleeve according to claim 1, characterized in that: The groove (11) is a U-shaped groove, and the width of the U-shaped groove is smaller than the wall thickness of the end of the frame (3).

6. The dust cover protective sleeve according to claim 5, characterized in that: The difference between the wall thickness of the end of the frame (3) and the width of the U-shaped groove is 0.3 to 0.8 mm.

7. The dust cover protective sleeve according to any one of claims 1 to 6, characterized in that: A guide surface (111) is provided on the side wall of the groove (11), and the guide surface (111) is arranged to be gradually reduced along the depth direction of the groove (11).

8. The dust cover protective sleeve according to any one of claims 1 to 6, characterized in that: A first opening end surface (12) and a second opening end surface (13) are provided along the circumference of the protective cover body (1); the first opening end surface (12) and the second opening end surface (13) are arranged opposite to each other to form the opening.

9. The dust cover protective sleeve according to claim 8, characterized in that: The first opening end surface (12) and the second opening end surface (13) are flat surfaces or curved surfaces.

10. A transmission shaft assembly, comprising the dust cover protective sleeve according to any one of claims 1 to 9, characterized in that: It also includes a frame (3), a universal joint assembly (4), a dust cover (5) and a shaft (6); the universal joint assembly (4) is connected to the frame (3) and the shaft (6) respectively; the dust cover (5) is connected to the frame (3) and the shaft (6) respectively; and the protective cover body (1) is clamped with the end of the frame (3).

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