Dustproof sleeve and universal joint

Abstract

The invention relates to the technical field of universal joints, in particular to a dustproof sleeve and a universal joint. The dustproof assembly is arranged to be a tubular body; the connecting assembly comprises a connecting unit and an abutting unit; the connecting unit is fixedly connected with one axial end of the dustproof assembly; the abutting unit comprises a first abutting module; the first abutting module comprises a first reinforcing rib, a second reinforcing rib and a first abutting part; one end of the first reinforcing rib is fixedly connected with the inner peripheral wall of the connecting unit, and the other end extends towards the space surrounded by the connecting unit; one end of the second reinforcing rib is fixedly connected with the inner peripheral wall of the connecting unit, and the other end extends towards the space surrounded by the connecting unit; the side wall of the first abutting part is fixedly connected with the first reinforcing rib in the direction away from the inner circumferential wall of the connecting unit. And the side wall of the first abutting part is fixedly connected with the second reinforcing rib in the direction far away from the inner peripheral wall of the connecting unit, so that the problem that the rolling body is easily separated from the universal joint shell is solved.

Description

Technical Field

[0001] The invention relates to the technical field of universal joints, and in particular to a dust cover and a universal joint. Background Art

[0002] With the rapid development of the automobile industry, the requirements for vehicle transmission systems are becoming higher and higher. As a key component of the transmission system, the universal joint can realize power transmission in different directions and positions, and plays an extremely important role in improving vehicle efficiency. The universal joint is mainly composed of a dust cover, a rolling element and a housing assembly. The rolling element can slide in the housing along the length direction. One end of the rolling element is limited by the bottom end of the housing, and the other end is limited by the dust cover. Through the movement of the rolling element in the universal joint housing assembly, the power transmission of the universal joint in different directions and positions can be realized.

[0003] However, when the limiting component on the dust cover is impacted by the rolling body, excessive impact of the rolling body may cause excessive deformation of the limiting component, resulting in the limiting component losing its limiting effect, thereby causing the rolling body to detach from the universal joint housing. Summary of the invention

[0004] In order to solve the problem that a rolling body is easily separated from a universal joint housing, the present invention provides a dust cover and a universal joint.

[0005] In a first aspect, the present invention provides a dust cover, the dust cover comprising:

[0006] A dustproof component, wherein the dustproof component is configured as a tubular body;

[0007] A connecting component, the connecting component includes a connecting unit and an abutment unit; the connecting unit is fixedly connected to one axial end of the dustproof component; the abutment unit includes a first abutment module; the first abutment module includes a first reinforcing rib, a second reinforcing rib, and a first abutment portion; one end of the first reinforcing rib is fixedly connected to the inner circumferential wall of the connecting unit, and the other end extends toward the space surrounded by the connecting unit; one end of the second reinforcing rib is fixedly connected to the inner circumferential wall of the connecting unit, and the other end extends toward the space surrounded by the connecting unit; the side wall of the first abutment portion is fixedly connected to the first reinforcing rib in a direction away from the inner circumferential wall of the connecting unit; the side wall of the first abutment portion is fixedly connected to the second reinforcing rib in a direction away from the inner circumferential wall of the connecting unit; L1>L2; wherein, L1 is the distance between one end of the first reinforcing rib close to the inner circumferential wall of the connecting unit and one end of the second reinforcing rib close to the inner circumferential wall of the connecting unit; L2 is the distance between one end of the first reinforcing rib close to the first abutment portion and one end of the second reinforcing rib close to the first abutment portion.

[0008] In some embodiments, H1>H2; wherein H1 is the thickness of the first reinforcing rib; H2 is the thickness of the second reinforcing rib.

[0009] In some embodiments, the connecting unit includes a first connecting module and a second connecting module; the first connecting module includes a first connecting portion and a first protruding portion; the first connecting portion is configured as an annular body; the dustproof assembly, the first connecting portion, and the second connecting module are fixedly connected in sequence along the central axis of the dustproof assembly; one end of the first protruding portion is fixedly connected to the inner circumference of the first connecting portion, and the other end extends toward the space surrounded by the first connecting portion; the first reinforcing rib is fixedly connected to the first protruding portion; and the second reinforcing rib is fixedly connected to the first connecting portion.

[0010] In some embodiments, the first connection module also includes a first groove; the first groove is recessed from the outer circumference of the first connection part toward the inner circumference of the first connection part; the first groove is arranged in the projection area of ​​the first protrusion along the inner circumference of the first connection part to the outer circumference of the first connection part.

[0011] In some embodiments, the first connection module further includes a fifth reinforcement rib; one end of the fifth reinforcement rib is fixedly connected to the first groove, and the other end is fixedly connected to an end of the second connection module close to the dustproof component.

[0012] In some embodiments, one end of the first abutting portion close to the dustproof component is fixedly connected to the dustproof component.

[0013] In some embodiments, L2=0.

[0014] In some embodiments, the connection unit includes a first connection module and a second connection module; the second connection module includes a second connection portion and a second groove; the second groove is recessed from an outer circumferential surface of the second connection portion toward an inner circumferential surface of the second connection portion.

[0015] In some embodiments, the second connection module also includes a seventh reinforcing rib; the seventh reinforcing rib is fixedly connected to an end of the second groove close to the dustproof component; the seventh reinforcing rib is fixedly connected to an end of the second groove away from the dustproof component; the seventh reinforcing rib is fixedly connected to a side of the second groove away from the outer peripheral surface of the second connection part; the projection area of ​​the seventh reinforcing rib along the axial direction of the second connection part is smaller than the projection area of ​​the second groove along the axial direction of the second connection part.

[0016] In some embodiments, the abutment unit also includes a second abutment module; the second abutment module includes a third reinforcement rib, a fourth reinforcement rib, and a second abutment portion; one end of the third reinforcement rib is fixedly connected to the inner circumferential wall of the connecting unit, and the other end extends toward the space surrounded by the connecting unit; the third reinforcement rib is arranged on the side of the second reinforcement rib away from the first reinforcement rib; one end of the fourth reinforcement rib is fixedly connected to the inner circumferential wall of the connecting unit, and the other end extends toward the space surrounded by the connecting unit; the fourth reinforcement rib is arranged on the side of the third reinforcement rib away from the second reinforcement rib; the side wall of the second abutment portion is fixedly connected to one end of the third reinforcement rib away from the inner circumferential wall of the connecting unit; the side wall of the second abutment portion is fixedly connected to one end of the fourth reinforcement rib away from the inner circumferential wall of the connecting unit; L3>L4; wherein L3 is the distance between one end of the third reinforcement rib close to the inner circumferential wall of the connecting unit and one end of the fourth reinforcement rib close to the inner circumferential wall of the connecting unit; L4 is the distance between one end of the third reinforcement rib close to the second abutment portion and one end of the fourth reinforcement rib close to the second abutment portion.

[0017] In some embodiments, L5>L6; wherein L5 is the distance between the first abutment portion close to one end of the dustproof assembly and the second abutment portion close to one end of the dustproof assembly; L6 is the distance between the first abutment portion away from one end of the dustproof assembly and the second abutment portion away from one end of the dustproof assembly.

[0018] In some embodiments, H1>H3; H4>H2; H4>H3; wherein H1 is the thickness of the first reinforcing rib; H2 is the thickness of the second reinforcing rib; H3 is the thickness of the third reinforcing rib; H3 is the thickness of the fourth reinforcing rib.

[0019] In some embodiments, the connecting unit includes a first connecting module and a second connecting module; the first connecting module includes a first connecting portion and a first protruding portion; the first connecting portion is configured as an annular body; the dustproof assembly, the first connecting portion, and the second connecting module are fixedly connected in sequence along the central axis of the dustproof assembly; one end of the first protruding portion is fixedly connected to the inner circumferential surface of the first connecting portion, and the other end extends toward the space surrounded by the first connecting portion; the fourth reinforcing rib is fixedly connected to the first protruding portion; the third reinforcing rib is fixedly connected to the first connecting portion.

[0020] In some embodiments, the first connection module also includes a first groove; the first groove is recessed from the outer circumferential surface of the first connection part toward the inner circumferential surface of the first connection part; the first groove is arranged in the projection area of ​​the space between the second reinforcement rib and the third reinforcement rib along the direction from the inner circumferential surface of the first connection part to the outer circumferential surface of the first connection part.

[0021] In a second aspect, the present invention discloses a universal joint, which is applied to any one of the dust cover in the first aspect, and comprises:

[0022] A transmission assembly, the transmission assembly comprises a housing unit and a moving unit; the housing unit comprises a shell, a guide groove, and a shaft cover; the shell is configured as a tubular body; the guide groove is recessed from the inner circumference of the shell toward the outer circumference of the shell; the shaft cover is fixedly connected to one end of the shell along the axial direction of the shell; the moving unit is adapted to the guide groove; the moving unit is slidably connected to the guide groove; the moving unit moves along the axial direction of the shell;

[0023] A fastening assembly, through which the dustproof assembly is detachably connected to the outer peripheral wall of the housing unit;

[0024] The first abutting portion is located within a projection area of ​​the guide groove along the axial direction of the housing.

[0025] In order to solve the problem that the rolling element is easily separated from the universal joint housing, the present invention has the following advantages:

[0026] The first abutment module includes a first reinforcing rib, a second reinforcing rib, and a first abutment portion; one end of the first reinforcing rib is fixedly connected to the inner circumferential wall of the connection unit, and the other end extends toward the space surrounded by the connection unit; one end of the second reinforcing rib is fixedly connected to the inner circumferential wall of the connection unit, and the other end extends toward the space surrounded by the connection unit; the side wall of the first abutment portion is fixedly connected to the first reinforcing rib away from the inner circumferential wall of the connection unit; the side wall of the first abutment portion is fixedly connected to the second reinforcing rib away from the inner circumferential wall of the connection unit. By simultaneously arranging the first reinforcing rib and the second reinforcing rib, when the rolling body impacts the dust cover, the first abutment portion can bear the impact of the rolling body, and the first reinforcing rib and the second reinforcing rib can improve the impact resistance of the first abutment portion, and the first reinforcing rib, the second reinforcing rib, and the first abutment portion can jointly bear the impact force of the dust cover on the rolling body, so as to prevent the first reinforcing rib, the second reinforcing rib, and the first abutment portion from being deformed too much due to the excessive impact force, thereby causing the rolling body to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a universal joint of a first embodiment is shown;

[0028] Figure 2 A schematic diagram of a universal joint of a second embodiment is shown;

[0029] Figure 3 A schematic diagram of a universal joint of a third embodiment is shown;

[0030] Figure 4 A partial schematic diagram of a universal joint according to an embodiment is shown;

[0031] Figure 5 A schematic diagram of a dust cover according to an embodiment is shown;

[0032] Figure 6 A schematic diagram of a dust cover in another embodiment is shown.

[0033] Figure markings: 01 dustproof component; 11 sleeve; 12 fastening part; 02 connecting component; 21 abutting unit; 211 first abutting module; 2111 first reinforcing rib; 2112 second reinforcing rib; 2113 first abutting part; 212 second abutting module; 2121 third reinforcing rib; 2122 fourth reinforcing rib; 2123 second abutting part; 22 connecting unit; 221 first connecting module; 2211 first connecting part; 2212 first protruding part; 2213 first groove; 2214 fifth reinforcing rib; 2215 sixth reinforcing rib; 222 second connecting module; 2221 second connecting part; 2222 second groove; 2223 seventh reinforcing rib; 03 fastening component; 04 transmission component; 41 shell unit; 411 shell; 412 guide groove; 413 shaft cover; 42 moving unit; 421 rolling body; 422 third connecting part. DETAILED DESCRIPTION

[0034] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0035] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0036] In this embodiment, the dust cover generally includes a dust cover component 01, a connection unit 22 and an abutment unit 21. During the use of the universal joint, the rolling body 421 can slide in the shell along the length direction. One end of the rolling body 421 can be limited by the dust cover, so that the rolling body 421 can impact the dust cover. At this time, the abutment unit 21 of the dust cover component 01 can be supported to prevent the rolling body 421 from detaching from the universal joint shell. However, during use, due to excessive impact of the rolling body 421, the abutment unit 21 of the dust cover is prone to deformation and failure, thereby causing the rolling body 421 to detach from the universal joint shell, causing the universal joint to fail. This embodiment provides a dust cover, such as Figure 1 As shown, the dust cover may include a dust cover component 01 and a connection component 02. The dust cover component 01 may be configured as a tubular body to prevent dust from entering the universal joint component. Figure 3As shown, the dustproof component 01 may include a sleeve 11 and a fastening portion 12. The connecting component 02 may include a connecting unit 22 and an abutting unit 21. The connecting unit 22 may be fixedly connected to one axial end of the dustproof component 01, so that the dustproof unit may be connected to other components through the connecting component 02. The abutting unit 21 may include a first abutting module 211. The first abutting module 211 may include a first reinforcing rib 2111, a second reinforcing rib 2112, and a first abutting portion 2113. One end of the first reinforcing rib 2111 may be fixedly connected to the inner circumferential wall of the connecting unit 22, and the other end may extend toward the space surrounded by the connecting unit 22. One end of the second reinforcing rib 2112 may be fixedly connected to the inner circumferential wall of the connecting unit 22, and the other end may extend toward the space surrounded by the connecting unit 22. The side wall of the first abutting portion 2113 may be fixedly connected to the first reinforcing rib 2111 away from the inner circumferential wall of the connecting unit 22. The side wall of the first abutting portion 2113 can be fixedly connected with the second reinforcing rib 2112 away from the inner peripheral wall of the connecting unit 22. By providing the first reinforcing rib 2111 and the second reinforcing rib 2112, when the rolling body 421 impacts the first abutting portion 2113, the first reinforcing rib 2111, the second reinforcing rib 2112 and the first abutting portion 2113 can jointly bear the impact of the rolling body 421, thereby reducing the deformation of the first reinforcing rib 2111, the second reinforcing rib 2112 and the first abutting portion 2113 and the displacement of the first abutting portion 2113, thereby preventing the rolling body 421 from detaching from the universal joint housing. L1>L2. Wherein, L1 is the distance between one end of the first reinforcing rib 2111 close to the inner peripheral wall of the connecting unit 22 and one end of the second reinforcing rib 2112 close to the inner peripheral wall of the connecting unit 22. L2 is the distance between one end of the first reinforcing rib 2111 close to the first abutting portion 2113 and one end of the second reinforcing rib 2112 close to the first abutting portion 2113. This design enhances the bending and torsion resistance of the first reinforcing rib 2111 and the second reinforcing rib 2112, disperses stress, and thus improves the impact resistance of the first reinforcing rib 2111, the second reinforcing rib 2112, and the first abutting portion 2113, and prevents the rolling element 421 from detaching from the universal joint housing.

[0037] In this embodiment, H1>H2. H1 is the thickness of the first reinforcing rib 2111. H2 is the thickness of the second reinforcing rib 2112. By increasing the thickness of the first reinforcing rib 2111, the overall structural strength of the first reinforcing rib 2111, the second reinforcing rib 2112, and the first abutting portion 2113 is improved, and at the same time, the stress can be dispersed to avoid excessive concentration of stress on the second reinforcing rib 2112, so that the first reinforcing rib 2111, the second reinforcing rib 2112, and the first abutting portion 2113 can better resist deformation and fracture.

[0038] In this embodiment, the connection unit 22 may include a first connection module 221 and a second connection module 222. The first connection module 221 may include a first connection portion 2211 and a first protrusion 2212. The first connection portion 2211 may be configured as an annular body. The dustproof component 01, the first connection portion 2211, and the second connection module 222 may be fixedly connected in sequence along the central axis of the dustproof component 01. One end of the first protrusion 2212 may be fixedly connected to the inner circumference of the first connection portion 2211, and the other end may extend toward the space surrounded by the first connection portion 2211. The first reinforcing rib 2111 may be fixedly connected to the first protrusion 2212. The second reinforcing rib 2112 may be fixedly connected to the first connection portion 2211. By fixedly connecting the first reinforcing rib 2111 and the first protruding portion 2212, the first reinforcing rib 2111 can evenly transfer stress to the first protruding portion 2212, thereby preventing stress concentration on the first protruding portion 2212, further reducing the deformation of the first reinforcing rib 2111 caused by a large impact force, and preventing the first reinforcing rib 2111 from easily breaking at the connection between the first reinforcing rib 2111 and the first protruding portion 2212.

[0039] In this embodiment, if Figure 3 As shown, the first connection module 221 may further include a first groove 2213. The first groove 2213 may be recessed from the outer circumferential surface of the first connection portion 2211 toward the inner circumferential surface of the first connection portion 2211. The first groove 2213 may be disposed within a projection area of ​​the first protrusion 2212 along the direction from the inner circumferential surface of the first connection portion 2211 to the outer circumferential surface of the first connection portion 2211. By providing the first groove 2213, the weight of the dust cover may be reduced, and at the same time, the wall thickness at the first protrusion 2212 may be reduced, thereby preventing the wall thickness at the first protrusion 2212 from being too large, resulting in uneven heating during the processing of the dust cover, causing deformation of the dust cover, and affecting the performance of the dust cover. In other embodiments, such as Figure 5 As shown, the dust cover may further include a sixth reinforcing rib 2215, which is fixedly connected to the first groove 2213 to prevent the first groove 2213 from being subjected to excessive impact and causing excessive deformation of the first groove 2213.

[0040] In this embodiment, the first connection module 221 further includes a fifth reinforcing rib 2214. One end of the fifth reinforcing rib 2214 is fixedly connected to the first groove 2213, and the other end is fixedly connected to the end of the second connection module 222 close to the dustproof component 01. When the rolling body 421 impacts the dustproof cover, the first groove 2213 will also be impacted. By providing the fifth reinforcing rib 2214, the deformation of the first groove 2213 when impacted can be reduced.

[0041] In this embodiment, the end of the first abutting portion 2113 close to the dustproof component 01 can be fixedly connected to the dustproof component 01. By fixing the end of the first abutting portion 2113 close to the dustproof component 01 to the dustproof component 01, the first abutting portion 2113 has a stronger impact resistance, preventing the rolling body 421 from detaching from the universal joint housing.

[0042] In this embodiment, L2 = 0. When L2 = 0, the first reinforcing rib 2111 and the second reinforcing rib 2112 can abut against one end close to the central axis of the connecting component 02. At this time, the first protrusion 2212, the first reinforcing rib 2111, and the second reinforcing rib 2112 can form a triangle, further increasing the bending resistance of the first reinforcing rib 2111 and the second reinforcing rib 2112, making the first abutting portion 2113 more impact-resistant, and preventing the rolling body 421 from detaching from the universal joint housing.

[0043] In this embodiment, the connection unit 22 may include a first connection module 221 and a second connection module 222. The second connection module 222 may include a second connection portion 2221 and a second groove 2222. The second groove 2222 may be recessed from the outer circumference of the second connection portion 2221 toward the inner circumference of the second connection portion 2221. By providing the second groove 2222, the weight of the dustproof component 01 is further reduced, and the wall thickness at the second groove 2222 may also be reduced, so as to prevent the dustproof cover from being easily broken due to uneven force at various positions of the dustproof cover caused by excessive wall thickness.

[0044] In this embodiment, if Figure 2 As shown, the second connection module 222 may further include a seventh reinforcing rib 2223. Figure 6 As shown, the seventh reinforcing rib 2223 can be fixedly connected to one end of the second groove 2222 close to the dustproof component 01. The seventh reinforcing rib 2223 can be fixedly connected to one end of the second groove 2222 away from the dustproof component 01. The seventh reinforcing rib 2223 can be fixedly connected to the side of the second groove 2222 away from the outer peripheral surface of the second connecting portion 2221. The projection area of ​​the seventh reinforcing rib 2223 along the axial direction of the second connecting portion 2221 can be smaller than the projection area of ​​the second groove 2222 along the axial direction of the second connecting portion 2221. By providing the seventh reinforcing rib 2223, it is possible to prevent the second groove 2222 from deforming too much when the rolling body 421 impacts the dustproof sleeve. In other embodiments, such as Figure 3 As shown, the universal joint further includes a fastening assembly 03. The fastening assembly 03 is sleeved on the second connection module 222, and the inner peripheral wall of the fastener abuts against the outer peripheral wall of the second connection module 222. By providing the seventh reinforcing rib 2223, the deformation of the second connection part 2221 caused by the fastening assembly 03 applying a radial force to the second connection part 2221 can be reduced.

[0045] In this embodiment, the abutting unit 21 may further include a second abutting module 212. The second abutting module 212 may include a third reinforcing rib 2121, a fourth reinforcing rib 2122, and a second abutting portion 2123. One end of the third reinforcing rib 2121 may be fixedly connected to the inner circumferential wall of the connecting unit 22, and the other end may extend toward the space surrounded by the connecting unit 22. The third reinforcing rib 2121 may be arranged on a side of the second reinforcing rib 2112 away from the first reinforcing rib 2111. One end of the fourth reinforcing rib 2122 may be fixedly connected to the inner circumferential wall of the connecting unit 22, and the other end may extend toward the space surrounded by the connecting unit 22. The fourth reinforcing rib 2122 may be arranged on a side of the third reinforcing rib 2121 away from the second reinforcing rib 2112. The side wall of the second abutting portion 2123 may be fixedly connected to one end of the third reinforcing rib 2121 away from the inner circumferential wall of the connecting unit 22. The side wall of the second abutting portion 2123 can be fixedly connected to one end of the fourth reinforcing rib 2122 away from the inner peripheral wall of the connecting unit 22. By providing the third reinforcing rib 2121 and the fourth reinforcing rib 2122, when the rolling body 421 impacts the second abutting portion 2123, the third reinforcing rib 2121, the fourth reinforcing rib 2122 and the second abutting portion 2123 can jointly bear the impact of the rolling body 421, thereby reducing the deformation of the third reinforcing rib 2121, the fourth reinforcing rib 2122 and the second abutting portion 2123 and the displacement of the first abutting portion 2113, thereby preventing the rolling body 421 from detaching from the universal joint housing. L3>L4. Among them, L3 is the distance between one end of the third reinforcing rib 2121 close to the inner peripheral wall of the connecting unit 22 and one end of the fourth reinforcing rib 2122 close to the inner peripheral wall of the connecting unit 22. L4 is the distance between one end of the third reinforcing rib 2121 close to the second abutting portion 2123 and one end of the fourth reinforcing rib 2122 close to the second abutting portion 2123. This design enhances the bending and torsion resistance of the third reinforcing rib 2121 and the fourth reinforcing rib 2122, disperses stress, and thus improves the impact resistance of the third reinforcing rib 2121, the fourth reinforcing rib 2122, and the second abutting portion 2123, preventing the rolling element 421 from detaching from the universal joint housing. In other embodiments, L4=0. When L4=0, the third reinforcing rib 2121 and the fourth reinforcing rib 2122 can abut against one end of the central axis of the connecting component 02. At this time, the first protrusion 2212, the third reinforcing rib 2121, and the fourth reinforcing rib 2122 can form a triangle, further increasing the bending resistance of the third reinforcing rib 2121 and the fourth reinforcing rib 2122, making the second abutting portion 2123 more impact-resistant, thereby preventing the rolling body 421 from detaching from the universal joint housing.

[0046] In this embodiment, L5>L6. Among them, L5 is the distance between the end of the first abutting portion 2113 close to the dustproof component 01 and the end of the second abutting portion 2123 close to the dustproof component 01. L6 is the distance between the end of the first abutting portion 2113 away from the dustproof component 01 and the end of the second abutting portion 2123 away from the dustproof component 01. When the rolling body 421 impacts the dustproof component 01, the rolling body 421 may abut against the inner circumferential wall of the first connecting portion 2211. This design allows the inner circumferential wall of the first connecting portion 2211 to bear part of the impact when the rolling body 421 abuts against the inner circumferential wall of the first connecting portion 2211, further preventing the rolling body 421 from detaching from the universal joint housing. In other embodiments, the end of the second abutting portion 2123 close to the dustproof component 01 can be fixedly connected to the dustproof component 01. The second abutting portion 2123 is fixedly connected to the dustproof component 01 at one end thereof close to the dustproof component 01 , so that the second abutting portion 2123 has a stronger impact resistance, thereby preventing the rolling body 421 from being separated from the universal joint housing.

[0047] In this embodiment, H1>H3. H4>H2. H4>H3. Among them, H1 is the thickness of the first reinforcing rib 2111. H2 is the thickness of the second reinforcing rib 2112. H3 is the thickness of the third reinforcing rib 2121. H3 is the thickness of the fourth reinforcing rib 2122. Since the rolling body 421 moves in the area between the second reinforcing rib 2112 and the third reinforcing rib 2121, when the rolling body 421 impacts the dustproof component 01, the rolling body 421 also has an impact force on both sides of the abutment unit 21, and this part of the force is more concentrated on the first reinforcing rib 2111 and the fourth reinforcing rib 2122. This design enhances the bending and torsion resistance of the first reinforcing rib 2111 and the fourth reinforcing rib 2122, further reduces the deformation of the first reinforcing rib 2111 and the fourth reinforcing rib 2122, thereby causing the rolling body 421 to detach from the universal joint housing.

[0048] In this embodiment, the connection unit 22 may include a first connection module 221 and a second connection module 222. The first connection module 221 may include a first connection portion 2211 and a first protrusion 2212. The first connection portion 2211 is configured as an annular body. The dustproof component 01, the first connection portion 2211, and the second connection module 222 may be fixedly connected in sequence along the central axis of the dustproof component 01. One end of the first protrusion 2212 may be fixedly connected to the inner circumference of the first connection portion 2211, and the other end may extend toward the space surrounded by the first connection portion 2211. The fourth reinforcing rib 2122 may be fixedly connected to the first protrusion 2212. The third reinforcing rib 2121 may be fixedly connected to the first connection portion 2211. By fixedly connecting the third reinforcing rib 2121 and the first protruding portion 2212, the first reinforcing rib 2111 can evenly transfer stress to the first protruding portion 2212, thereby preventing stress concentration on the first protruding portion 2212, further preventing the third reinforcing rib 2121 from being subjected to a large impact force and deforming excessively, and preventing the third reinforcing rib 2121 from being easily broken at the connection with the first protruding portion 2212.

[0049] In this embodiment, the first connection module 221 may further include a first groove 2213. The first groove 2213 may be recessed from the outer circumferential surface of the first connection portion 2211 toward the inner circumferential surface of the first connection portion 2211. The first groove 2213 may be disposed in the projection area of ​​the space between the second reinforcing rib 2112 and the third reinforcing rib 2121 along the inner circumferential surface of the first connection portion 2211 to the outer circumferential surface of the first connection portion 2211. By providing the first groove 2213, the weight of the dust cover may be reduced, and the wall thickness at the first protruding portion 2212 may be reduced, so as to prevent the wall thickness at the position of the first protruding portion 2212 from being too large, resulting in uneven force at various positions of the dust cover, which may cause the dust cover to be easily broken.

[0050] This embodiment discloses a universal joint, which may include a dust cover of any of the above embodiments, and may include:

[0051] Transmission assembly 04, transmission assembly 04 may include a housing unit 41 and a moving unit 42. The housing unit 41 may include a shell 411, a guide groove 412, and a shaft cover 413. The shell 411 may be configured as a tubular body. The guide groove 412 may be recessed from the inner circumference of the shell 411 toward the outer circumference of the shell 411, so that the rolling body 421 may move in the guide groove 412. The shaft cover 413 and the shell 411 may be fixedly connected along one end of the axial direction of the shell 411. The moving unit 42 may be adapted to the guide groove 412. The moving unit 42 may be slidably connected to the guide groove 412. The moving unit 42 may move along the axial direction of the shell 411. As shown in FIG. Figure 4As shown, the mobile unit 42 may include a rolling body 421 and a third connecting portion 422. The third connecting portion 422 and the guide groove 412 may limit the rolling body 421 to a certain extent, thereby ensuring the guiding function of the universal joint. The fastening component 03 and the dustproof component 01 are detachably connected to the outer peripheral wall of the housing unit 41 through the fastening component 03 to prevent the transmission component 04 from being separated from the dustproof component 01, thereby ensuring the tightness of the universal joint connection. The first abutment portion 2113 may be located within the projection area of ​​the guide groove 412 along the axial direction of the housing 411.

[0052] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A dust cover, characterized in that: The dust cover comprises: A dustproof component, wherein the dustproof component is configured as a tubular body; A connecting component, the connecting component includes a connecting unit and an abutment unit; the connecting unit is fixedly connected to one axial end of the dustproof component; the abutment unit includes a first abutment module; the first abutment module includes a first reinforcing rib, a second reinforcing rib, and a first abutment portion; one end of the first reinforcing rib is fixedly connected to the inner circumferential wall of the connecting unit, and the other end extends toward the space surrounded by the connecting unit; one end of the second reinforcing rib is fixedly connected to the inner circumferential wall of the connecting unit, and the other end extends toward the space surrounded by the connecting unit; the side wall of the first abutment portion is fixedly connected to the first reinforcing rib in a direction away from the inner circumferential wall of the connecting unit; the side wall of the first abutment portion is fixedly connected to the second reinforcing rib in a direction away from the inner circumferential wall of the connecting unit; L1>L2; wherein, L1 is the distance between one end of the first reinforcing rib close to the inner circumferential wall of the connecting unit and one end of the second reinforcing rib close to the inner circumferential wall of the connecting unit; L2 is the distance between one end of the first reinforcing rib close to the first abutment portion and one end of the second reinforcing rib close to the first abutment portion.

2. A dust cover according to claim 1, characterized in that: H1>H2; wherein H1 is the thickness of the first reinforcing rib; H2 is the thickness of the second reinforcing rib.

3. A dust cover according to claim 1, characterized in that: The connecting unit includes a first connecting module and a second connecting module; the first connecting module includes a first connecting portion and a first protruding portion; the first connecting portion is configured as an annular body; the dustproof assembly, the first connecting portion, and the second connecting module are fixedly connected in sequence along the central axis of the dustproof assembly; one end of the first protruding portion is fixedly connected to the inner circumferential surface of the first connecting portion, and the other end extends toward the space surrounded by the first connecting portion; the first reinforcing rib is fixedly connected to the first protruding portion; the second reinforcing rib is fixedly connected to the first connecting portion.

4. A dust cover according to claim 3, characterized in that: The first connection module also includes a first groove; the first groove is recessed from the outer circumference of the first connection part toward the inner circumference of the first connection part; the first groove is arranged in the projection area of ​​the first protrusion along the inner circumference of the first connection part to the outer circumference of the first connection part.

5. A dust cover according to claim 4, characterized in that: The first connection module further includes a fifth reinforcing rib; one end of the fifth reinforcing rib is fixedly connected to the first groove, and the other end is fixedly connected to an end of the second connection module close to the dustproof component.

6. A dust cover according to claim 1, characterized in that: One end of the first abutting portion close to the dustproof component is fixedly connected to the dustproof component.

7. The dust cover according to claim 1, characterized in that: L2＝0。 8. The dust cover according to claim 1, characterized in that: The connection unit includes a first connection module and a second connection module; the second connection module includes a second connection portion and a second groove; the second groove is recessed from an outer circumferential surface of the second connection portion toward an inner circumferential surface of the second connection portion.

9. A dust cover according to claim 8, characterized in that: The second connection module also includes a seventh reinforcing rib; the seventh reinforcing rib is fixedly connected to one end of the second groove close to the dustproof component; the seventh reinforcing rib is fixedly connected to one end of the second groove away from the dustproof component; the seventh reinforcing rib is fixedly connected to one side of the second groove away from the outer peripheral surface of the second connection part; the projection area of ​​the seventh reinforcing rib along the axial direction of the second connection part is smaller than the projection area of ​​the second groove along the axial direction of the second connection part.

10. A dust cover according to any one of claims 1 to 9, characterized in that: The abutment unit also includes a second abutment module; the second abutment module includes a third reinforcement rib, a fourth reinforcement rib, and a second abutment portion; one end of the third reinforcement rib is fixedly connected to the inner circumferential wall of the connection unit, and the other end extends toward the space surrounded by the connection unit; the third reinforcement rib is arranged on the side of the second reinforcement rib away from the first reinforcement rib; one end of the fourth reinforcement rib is fixedly connected to the inner circumferential wall of the connection unit, and the other end extends toward the space surrounded by the connection unit; the fourth reinforcement rib is arranged on the side of the third reinforcement rib away from the second reinforcement rib; the side wall of the second abutment portion is fixedly connected to one end of the third reinforcement rib away from the inner circumferential wall of the connection unit; the side wall of the second abutment portion is fixedly connected to one end of the fourth reinforcement rib away from the inner circumferential wall of the connection unit; L3>L4; wherein L3 is the distance between one end of the third reinforcement rib close to the inner circumferential wall of the connection unit and one end of the fourth reinforcement rib close to the inner circumferential wall of the connection unit; L4 is the distance between one end of the third reinforcement rib close to the second abutment portion and one end of the fourth reinforcement rib close to the second abutment portion.

11. A dust cover according to claim 10, characterized in that: L5>L6; wherein, L5 is the distance between the first abutment portion close to one end of the dustproof component and the second abutment portion close to one end of the dustproof component; L6 is the distance between the first abutment portion away from one end of the dustproof component and the second abutment portion away from one end of the dustproof component.

12. The dust cover according to claim 10, characterized in that: H1>H3; H4>H2; H4>H3; wherein, H1 is the thickness of the first reinforcing rib; H2 is the thickness of the second reinforcing rib; H3 is the thickness of the third reinforcing rib; H3 is the thickness of the fourth reinforcing rib.

13. The dust cover according to claim 10, characterized in that: The connecting unit includes a first connecting module and a second connecting module; the first connecting module includes a first connecting portion and a first protruding portion; the first connecting portion is configured as an annular body; the dustproof assembly, the first connecting portion, and the second connecting module are fixedly connected in sequence along the central axis of the dustproof assembly; one end of the first protruding portion is fixedly connected to the inner circumferential surface of the first connecting portion, and the other end extends toward the space surrounded by the first connecting portion; the fourth reinforcing rib is fixedly connected to the first protruding portion; the third reinforcing rib is fixedly connected to the first connecting portion.

14. A dust cover according to claim 13, characterized in that: The first connection module also includes a first groove; the first groove is recessed from the outer circumferential surface of the first connection part toward the inner circumferential surface of the first connection part; the first groove is arranged in the projection area of ​​the space between the second reinforcing rib and the third reinforcing rib along the direction from the inner circumferential surface of the first connection part to the outer circumferential surface of the first connection part.

15. A universal joint, characterized in that: The universal joint comprises a dust cover as claimed in any one of claims 1 to 14, and the universal joint further comprises: A transmission assembly, the transmission assembly comprises a housing unit and a moving unit; the housing unit comprises a shell, a guide groove, and a shaft cover; the shell is configured as a tubular body; the guide groove is recessed from the inner circumference of the shell toward the outer circumference of the shell; the shaft cover is fixedly connected to one end of the shell along the axial direction of the shell; the moving unit is adapted to the guide groove; the moving unit is slidably connected to the guide groove; the moving unit moves along the axial direction of the shell; A fastening assembly, through which the dustproof assembly is detachably connected to the outer peripheral wall of the housing unit; The first abutting portion is located within a projection area of ​​the guide groove along the axial direction of the housing.

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