Conductive dustproof cover and conductive bearing
By designing a conductive dust-proof cover and a conductive bearing in the bearing, the fastening connection structure of the first conductive ring and the second conductive ring is solved, and the problems of electric corrosion failure and high cost are achieved. The effect of charge release and cost reduction is achieved.
Patent Information
- Application Number
- CN202311531408.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-16
- Publication Date
- 2025-05-16
AI Technical Summary
Existing bearings are prone to electrical corrosion failure in electric drive systems or motors, and the high cost of ceramic ball bearings is difficult to accept.
A conductive dust-proof cover and conductive bearing are designed, and a fastening connection structure of the first conductive ring and the second conductive ring are adopted. The first conductive ring is a rigid structure and the second conductive ring is an elastic structure. The detachable connection is achieved through the design of the hook and the cog groove to ensure the charge release of the conductive bearing.
It effectively avoids the electric corrosion failure of bearings, reduces costs, and realizes a detachable fixed connection through simple structure and connection methods.
Smart Images
Figure CN120016238A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of bearings, and in particular to a conductive dust cover and a conductive bearing. Background Art
[0002] Bearings are mainly used in electric drive systems of new energy vehicles and industrial motors. However, there is often current in electric drive systems or motors, which makes conventional bearings prone to electrical corrosion failure. Therefore, the bearings need to be completely insulated or have a certain degree of conductivity to avoid electrical corrosion failure caused by charge accumulation between the inner and outer rings of the bearings and the rolling elements.
[0003] The solutions in the related art mostly use the insulation properties of ceramic ball bearings to prevent current from passing through the bearings, thereby avoiding electrical corrosion failure. However, the ceramic ball bearings in the technical solutions in the related art replace the traditional steel balls with ceramic balls. Although the insulation performance of the bearings is achieved, the cost of this type of bearings is very high. Summary of the invention
[0004] In order to overcome the problems existing in the related art, the present disclosure provides a conductive dust cover and a conductive bearing.
[0005] According to a first aspect of an embodiment of the present disclosure, the present disclosure provides a conductive dust cover for a conductive bearing, comprising: a first conductive ring, the first conductive ring being a rigid structure, and a hook is provided on one axial side of the first conductive ring; and a second conductive ring, the second conductive ring being an elastic structure, and being located on one axial side of the first conductive ring, wherein a first tooth is provided on the radial inner side of the second conductive ring, the hook is inserted between the tooth grooves of the first tooth, and abuts against the radial outer side of the tooth groove to limit the displacement of the second conductive ring toward the radial inner side, thereby realizing the snap-fit connection between the first conductive ring and the second conductive ring.
[0006] In some embodiments, a second tooth is provided on the radial inner side of the first conductive ring, wherein the second tooth is bent toward one axial side of the first conductive ring, and after the second tooth is inserted into the tooth groove of the first tooth, it is bent toward the radial outer side of the first conductive ring to form the hook.
[0007] In some embodiments, the radial inner side of the hook is located radially inner side of the first conductive ring.
[0008] In some embodiments, the hooks are provided in plurality along the circumferential direction and are arranged at equal intervals along the circumferential direction.
[0009] In some embodiments, the number and width of the hooks are respectively equal to the number and width of the tooth grooves of the first teeth, so that the hooks are cross-arranged with the first teeth in the circumferential direction.
[0010] In some embodiments, the first conductive ring is formed from a metal material by stamping.
[0011] In some embodiments, the second conductive ring is made of a conductive metal sheet or a conductive rubber.
[0012] In some embodiments, the radial outer side of the first conductive ring includes a curled portion, and the width of the curled portion is greater than the thickness of the first conductive ring.
[0013] According to a second aspect of an embodiment of the present disclosure, the present disclosure provides a conductive bearing, comprising: the conductive dust cover described in the first aspect; an outer ring, a groove is provided on the radial inner side of the outer ring, and the radial outer side of the first conductive ring is inserted into the groove for fixed connection with the outer ring; and an inner ring, the first tooth of the second conductive ring is elastically abutted against the inner ring.
[0014] In some embodiments, the inner ring is provided with a stepped end surface, and an axial side of the first tooth of the second conductive ring is elastically in contact with the stepped end surface of the inner ring.
[0015] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:
[0016] 1. The first conductive ring and the second conductive ring can conduct electricity, which is beneficial to release the charge of the conductive bearing and prevent the bearing from being corroded.
[0017] 2. The first conductive ring and the second conductive ring can be detachably connected through the hook and the tooth groove of the first tooth, and the structure and connection method are simple.
[0018] 3. The rigid first conductive ring is convenient for fixed connection with the conductive bearing, and the second conductive ring is an elastic structure, which is convenient for sliding contact with the conductive bearing, and the second conductive ring has a first tooth to ensure that it can always slide contact with the conductive bearing to release the charge. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0020] Figure 1 is an exploded view of a conductive dust cover according to an exemplary embodiment;
[0021] Figure 2 is an assembly diagram of a conductive dust cover according to an exemplary embodiment;
[0022] Figure 3 is a schematic diagram of a three-dimensional structure of a conductive bearing according to an exemplary embodiment;
[0023] Figure 4 is an axial cross-sectional view of a conductive bearing according to an exemplary embodiment. DETAILED DESCRIPTION
[0024] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.
[0025] In the present invention, unless otherwise specified, the axial direction A, radial direction R and circumferential direction W refer to the axial direction A, radial direction R and circumferential direction W of the conductive bearing 100 and the conductive dust cover 10 respectively; the axial side (or the inner side of the bearing) refers to Figures 1 to 4 The left side in the figure (for example, the side close to the rolling element 40) and the other axial side (or the axial outer side) refer to Figures 1 to 4 The right side in the figure (e.g., the side away from the rolling element 40); the radially outer side refers to the side away from the rolling element 40 in the radial direction. Figure 4 On the side of the central axis ( Figure 4 The radial inner side refers to the side close to the central axis in the radial direction ( Figure 4 ).
[0026] In order to solve the above technical problems, the present disclosure provides a conductive dust cover 10, which is applied to a conductive bearing 100. Figure 4 As shown, the conductive bearing 100 further includes an outer ring 20, an inner ring 30 and rolling elements 40. Figures 1 to 3 As shown, the conductive dust cover 10 is annular and radially located between the inner ring 30 and the outer ring 20 of the conductive bearing 100. The conductive dust cover 10 is used to release the charge on the conductive bearing 100, avoid electrical corrosion of the conductive bearing 100, and extend the service life of the conductive bearing 100.
[0027] like Figures 1 to 4 As shown, the conductive dust cover 10 includes a first conductive ring 11 and a second conductive ring 12, and the first conductive ring 11 and the second conductive ring 12 are generally plate-shaped structures. The first conductive ring 11 is used for fixed connection with the outer ring 20, and the second conductive ring 12 is used for sliding contact connection with the inner ring 30.
[0028] The first conductive ring 11 is a rigid structure. In some embodiments, the first conductive ring 11 is a sheet metal stamping part, which can be formed by stamping of metal materials. A slot 21 is provided on the radial inner side of the outer ring 20. The first conductive ring 11 of the rigid structure is strong and not easy to bend. Therefore, the radial outer side of the first conductive ring 11 is inserted into the slot 21 for fixed connection with the outer ring 20, so that the conductive dust cover 10 is fixed to the conductive bearing 100.
[0029] Among them, a hook 111 is provided on the axial side of the first conductive ring 11, and the second conductive ring 12 is located on the axial side of the first conductive ring 11. The second conductive ring 12 is buckled on the axial side of the first conductive ring 11 through the hook 111, so that the second conductive ring 12 and the first conductive ring 11 are detachably fixedly connected.
[0030] The second conductive ring 12 is an elastic structure. In some embodiments, the second conductive ring 12 can be made of a conductive metal sheet or a conductive rubber. When the second conductive ring 12 is made of a conductive metal sheet, the strength and thickness of the second conductive ring 12 are different from those of the first conductive ring 11, so that the second conductive ring 12 has elasticity. When the conductive dust cover 10 is installed between the outer ring 20 and the inner ring 30 of the conductive bearing 100, the second conductive ring 12 can achieve sliding contact connection with the inner ring 30.
[0031] Furthermore, a plurality of first teeth 121 are provided on the radial inner side of the second conductive ring 12, and the plurality of first teeth 121 are evenly arranged at equal intervals along the circumferential direction W, and the width of the tooth grooves 122 between adjacent first teeth 121 is close to the circumferential width of the first teeth 121, so that the first teeth 121 and the tooth grooves 122 are cross-arranged along the circumferential direction.
[0032] The hook 111 is inserted between the tooth grooves 122 of the first teeth 121 and abuts against the radial outer side of the tooth grooves 122 to limit the radial inward displacement of the second conductive ring 12 and realize the buckling connection between the first conductive rings 11 and 11 .
[0033] As can be seen from the above content, the hook 111 is inserted between the tooth groove 122 of the first tooth 121, so that the first conductive ring 11 and the second conductive ring 12 can be snapped together, and the connection method and structure are simple. In addition, when the radial position of the hook 111 on the first conductive ring 11 remains unchanged and the radial length of the second conductive ring 12 remains unchanged, since the hook 111 needs to abut against the radial outer side of the tooth groove 122 of the first tooth 121, the radial dimension of the first tooth 121 of the second conductive ring 12 can be lengthened, so that the first tooth 121 of the second conductive ring 12 has better elasticity. When the second conductive ring 12 is slidably connected to the inner ring 30, the first tooth 121 with better elasticity can ensure that the conductive dust cover 10 is always connected to the inner ring 30, which is more conducive to the release of the charge on the conductive bearing 100 and prevents the conductive bearing 100 from being corroded by electricity.
[0034] In some other embodiments, the second conductive ring 12 may also be specially provided with a connection hole (not shown in the figure), the connection hole is located radially outside the first tooth 121, and the hook 111 can also realize the snap connection between the first conductive ring 11 and the second conductive ring 12 by being inserted into the connection hole of the second conductive ring 12. The second conductive ring 12 of this embodiment still has the first tooth 121, and can also ensure that the conductive dust cover 10 is always connected to the inner ring 30 to release the charge. However, due to the setting of the connection hole in this embodiment, the radial length of the first tooth 121 is not as good as that of the present embodiment, and therefore the elasticity of the first tooth 121 is not as good as that of the present embodiment.
[0035] Furthermore, in this embodiment, if Figure 1 and Figure 2 As shown, a second tooth 112 is provided on the radial inner side of the first conductive ring 11, wherein the second tooth 112 is bent toward one axial side of the first conductive ring 11, and after the second tooth 112 is inserted into the tooth groove 122 of the first tooth 121, it is bent toward the radial outer side of the first conductive ring 11 to form a hook 111.
[0036] Specifically, when the second conductive ring 12 is installed with the first conductive ring 11, the second teeth 112 of the first conductive ring 11 are first bent along a direction parallel to the axial direction, and then the second conductive ring 12 is fitted with the first conductive ring 11, and the first teeth 121 and the second teeth 112 are cross-arranged. After the second teeth 112 are inserted between the tooth grooves 122 of the first teeth 121, the second teeth 112 of the first conductive ring 11 are bent along the radial outer direction to form the hooks 111.
[0037] The hook 111 formed by two bendings can not only limit the radial movement of the second conductive ring 12 , but also limit the axial movement of the second conductive ring 12 .
[0038] Furthermore, the hook 111 is formed by bending the second tooth 112 located on the radial inner side of the first conductive ring 11 toward one axial side and the radial outer side, wherein after the hook 111 is formed, the radial inner side of the hook 111 is located on the radial inner side of the first conductive ring 11 (as in the present embodiment). Figure 1 As shown in FIG. 1 , after the second teeth 112 form the hooks 111 , they still present a tooth-like structure.
[0039] Because, after the first conductive ring 11 and the second conductive ring 12 are buckled and connected, the first teeth 121 of the second conductive ring 12 will radially cover the tooth grooves 122 of the second teeth 112 , thus saving the material of the first conductive ring 11 and reducing the cost.
[0040] Of course, in some other embodiments, the radial inner side of the hook 111 may be flush with the radial inner side of the first conductive ring 11 , or the hook 111 may be located between the radial outer side and the radial inner side of the first conductive ring 11 .
[0041] Recombination Figure 3 and Figure 4 As shown, after the conductive dust cover 10 is installed on the conductive bearing 100, the radial inner side 114 (such as Figure 2 There is a gap in the radial direction between the outer wall 32 of the inner ring 30 of the conductive bearing 100, and there is a circumferential gap between the tooth grooves 122 of the first teeth 121 of the second conductive ring 12, so that the conductive dust cover 10 can play a partial dustproof role, but cannot play a complete sealing role. To this end, the distance of the gap between the radial inner side 114 of the hook 111 and the outer wall 32 of the inner ring 30 can be changed to change the dustproof or sealing effect of the conductive dust cover 10.
[0042] In some embodiments, a plurality of hooks 111 are provided along the circumferential direction and are arranged at equal intervals along the circumferential direction. For example, the hooks 111 can be provided in three, four, six or eight forms, and the hooks 111 arranged at equal intervals along the circumferential direction can make the circumferential force of the buckled connection between the second conductive ring 12 and the first conductive ring 11 more uniform, thereby preventing the second conductive ring 12 from falling off relative to the first conductive ring 11.
[0043] In this embodiment, the number and width of the hooks 111 are respectively equal to the number and width of the tooth grooves 122 of the first teeth 121, so that the hooks 111 and the first teeth 121 are arranged crosswise in the circumferential direction. The connection method of the hooks 111 and the first teeth 121 disclosed in the present invention can make the connection between the first conductive ring 11 and the second conductive ring 12 more firmly. In addition, the conductive bearing 100 rotates circumferentially at high speed, and the number of hooks 111 is large, which can prevent the hooks 111 from breaking during high-speed rotation.
[0044] In addition, the width of the hook 111 is also equal to the width of the tooth groove 122 of the first tooth 121 , and the gap between the hook 111 and the first tooth 121 in the circumferential direction is small, which can prevent the second conductive ring 12 from rotating circumferentially relative to the first conductive ring 11 .
[0045] In some embodiments, Figure 4 As shown, the radial outer side of the first conductive ring 11 includes a curling portion 113, and the width of the curling portion 113 is greater than the thickness of the first conductive ring 11. The curling portion 113 is formed by bending the radial outer side of the first conductive ring 11 and forming an integral body. The curling portion 113 increases the thickness and strength of the radial outer side of the first conductive ring 11, thereby making the connection between the first conductive ring 11 and the outer ring 20 of the conductive bearing 100 more stable, and preventing the conductive dust cover 10 from falling off.
[0046] Based on the same inventive concept, the present disclosure provides a conductive bearing 100, comprising the above-mentioned conductive dust cover 10. In some embodiments, the inner ring 30 is provided with a stepped end face 31, and one axial side of the first tooth 121 of the second conductive ring 12 is elastically abutted against the stepped end face 31 of the inner ring 30. The inner ring 30 is provided with a stepped end face 31, which can increase the radial contact length and contact area between the first tooth 121 of the second conductive ring 12 and the inner ring 30, thereby ensuring that the first tooth 121 of the second conductive ring 12 can always maintain dynamic abutment with the inner ring 30, so that the charges accumulated on the conductive bearing 100 can flow out, and the conductive bearing 100 is prevented from suffering from electrical corrosion.
[0047] The specific manners of implementing other functions in the conductive bearing 100 in the above embodiment have been described in detail in the embodiment of the conductive dust cover 10, and will not be elaborated here.
[0048] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.
[0049] It is further understood that the terms "first", "second", etc. are used to describe various structures, but these structures should not be limited to these terms. These terms are only used to distinguish structures of the same type from each other, and do not indicate a specific order or importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, a first structure can also be referred to as a second structure, and similarly, a second structure can also be referred to as a first structure.
[0050] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following scope of rights.
[0051] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.
Claims
1. A conductive dust cover (10) for a conductive bearing (100), characterized in that: include: A first conductive ring (11), wherein the first conductive ring (11) is a rigid structure, and a hook (111) is provided on one axial side of the first conductive ring (11); and A second conductive ring (12), the second conductive ring (12) is an elastic structure and is located on one axial side of the first conductive ring (11), The second conductive ring (12) is provided with a first tooth (121) on the radial inner side, and the hook (111) is inserted between the tooth grooves (122) of the first tooth (121) and abuts against the radial outer side of the tooth groove (122) to limit the displacement of the second conductive ring (12) toward the radial inner side, thereby realizing the buckling connection between the first conductive ring (11) and the second conductive ring (11).
2. The conductive dust cover (10) according to claim 1, characterized in that: A second tooth (112) is provided on the radial inner side of the first conductive ring (11), The second tooth (112) is bent toward one axial side of the first conductive ring (11), and after the second tooth (112) is inserted into the tooth groove (122) of the first tooth (121), it is bent toward the radial outer side of the first conductive ring (11) to form the hook (111).
3. The conductive dust cover (10) according to claim 2, characterized in that: The radial inner side of the hook (111) is located radially inner side of the first conductive ring (11).
4. The conductive dust cover (10) according to claim 1, characterized in that: A plurality of the hooks (111) are provided along the circumferential direction and are arranged at equal intervals along the circumferential direction.
5. The conductive dust cover (10) according to claim 3, characterized in that: The number and width of the hooks (111) are respectively equal to the number and width of the tooth grooves (122) of the first teeth (121), so that the hooks (111) and the first teeth (121) are arranged crosswise in the circumferential direction.
6. The conductive dust cover (10) according to claim 1, characterized in that: The first conductive ring (11) is formed from a metal material by stamping.
7. The conductive dust cover (10) according to claim 1, characterized in that: The second conductive ring (12) is made of a conductive metal sheet or conductive rubber.
8. The conductive dust cover (10) according to claim 1, characterized in that: The radial outer side of the first conductive ring (11) comprises a curled portion (113), and the width of the curled portion (113) is greater than the thickness of the first conductive ring (11).
9. A conductive bearing (100), characterized in that: include: The conductive dust cover (10) according to any one of claims 1 to 8; An outer ring (20), wherein a slot (21) is provided on the radial inner side of the outer ring (20), and the radial outer side of the first conductive ring (11) is inserted into the slot (21) for fixed connection with the outer ring (20); and The inner ring (30), the first teeth (121) of the second conductive ring (12) elastically abut against the inner ring (30).
10. The conductive bearing (100) according to claim 9, characterized in that: The inner ring (30) is provided with a stepped end surface (31), and one axial side of the first tooth (121) of the second conductive ring (12) is in elastic contact with the stepped end surface (31) of the inner ring (30).