Conductive bearing

Abstract

The utility model relates to a kind of electrically conductive bearings. The electrically conductive bearing includes: outer ring, inner ring, multiple rollers and electrically conductive ring. Inner ring is coaxially arranged on the radial inner side of the outer ring;Multiple rollers are arranged between the outer ring and the inner ring in radial direction;Electrically conductive ring includes: the radial extension formed in radial direction, the electrically conductive ring fixed part extended by the radial side of the radial extension towards axial direction and the electrically conductive ring contact part arranged on the radial other side of the radial extension;Wherein, the electrically conductive ring fixed part is fixedly arranged on the radial side of one of the outer ring and the inner ring, which faces away from the roller;The electrically conductive ring contact part is directly or indirectly contactable with the other of the outer ring and the inner ring relatively rotatable arrangement. The electrically conductive bearing of the utility model can conduct electricity between the inner ring and the outer ring of the bearing, prevent electric corrosion failure, and low cost.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology. Specifically, this utility model relates to a conductive bearing. Background Technology

[0002] In industrial motors and electric drive systems for new energy vehicles, current exists in the motor or electric drive system. Therefore, conventional bearings in the system are prone to electro-corrosion failure. This requires the bearing to have complete insulation or a certain degree of conductivity to solve the problem of bearing electro-corrosion failure caused by loop current or discharge current between the inner and outer rings of the bearing and the rolling elements.

[0003] Current technologies often employ a ceramic ball bearing at one end, utilizing the insulating properties of ceramics to prevent current from flowing through the bearing and thus avoiding electro-corrosion failure. However, ceramic ball bearings are very expensive. The other end typically relies on additional conductive components to conduct current. This approach also requires additional conductive components and is relatively costly.

[0004] Therefore, there is an urgent need for an integrated solution for motors or electric drive systems that is relatively low-cost and can prevent electro-corrosion failure, namely conductive bearings. Utility Model Content

[0005] To solve the above technical problems, this utility model provides a conductive bearing.

[0006] An embodiment of this utility model provides a conductive bearing, including: an outer ring, an inner ring, a plurality of rollers, and a conductive ring. The inner ring is coaxially disposed radially inside the outer ring; the rollers are radially disposed between the outer ring and the inner ring; the conductive ring includes: a radially extending portion, a conductive ring fixing portion extending axially from one radial side of the radially extending portion, and a conductive ring contact portion disposed on the other radial side of the radially extending portion. The conductive ring fixing portion is fixedly disposed on the radial side of one of the outer ring and the inner ring opposite to the rollers; the conductive ring contact portion is rotatably, directly, or indirectly in contact with the other of the outer ring and the inner ring.

[0007] According to some optional embodiments, a mounting groove is provided on the radially outer side of the outer ring or the radially inner side of the inner ring, and the extended end of the conductive ring fixing part is bent radially toward the outer ring or the inner ring to form a conductive ring snap-fit ​​part, which is engaged and fixed with the mounting groove.

[0008] According to some optional embodiments, a mounting groove is provided on the radially outer side of the outer ring or the radially inner side of the inner ring, and the conductive ring fixing part protrudes radially toward the outer ring or the inner ring to form a conductive ring snap-fit ​​part, which is engaged and fixed with the mounting groove.

[0009] According to some optional embodiments, the axially extending end of the conductive ring fixing part is provided with a plurality of fixing part openings that are circumferentially spaced and evenly distributed, and a fixing sub-part is formed between two adjacent fixing part openings.

[0010] According to some optional embodiments, the conductive ring contact portion is configured as a C-shaped structure or an S-shaped structure bent between the axial and radial directions, wherein the extended end portion of the conductive ring contact portion is configured to rotatably contact the other of the outer ring and the inner ring, directly or indirectly.

[0011] According to some optional embodiments, the conductive ring contact portion has a plurality of contact openings that are spaced apart circumferentially and evenly distributed, and a contact portion is formed between two adjacent contact openings.

[0012] According to some optional embodiments, the conductive bearing further includes: a conductive contact ring, which is fixedly disposed on the other of the outer ring and the inner ring; the conductive ring and the conductive contact ring are rotatably contacted relative to each other.

[0013] According to some optional embodiments, the outer ring and the other of the inner rings are provided with an annular recess for mounting the conductive contact ring at a position radially facing the conductive ring and corresponding to the conductive ring. The conductive contact ring is configured as an independent annular structure and is disposed on the annular recess by an interference fit.

[0014] According to some alternative embodiments, the conductive contact ring is configured as a plated structure, formed by electroplating on the other side of the outer ring and the inner ring that faces the conductive ring radially.

[0015] According to some alternative embodiments, the conductive contact ring is made of graphite, copper, or aluminum alloy.

[0016] In the conductive bearing of this invention, a conductive ring is provided to electrically connect the inner and outer rings of the bearing, enabling electrical conductivity between them, preventing electro-corrosion failure, and reducing cost. Furthermore, the conductive bearing also includes a conductive contact ring; by arranging the conductive ring and the conductive contact ring in a rotatable contact, and by using a conductive contact ring made of graphite, copper, or aluminum alloy with a smooth surface and low coefficient of friction, electrical conductivity is ensured while reducing friction between the relatively rotating conductive ring and the conductive contact ring, allowing the conductive bearing to operate effectively and extending its service life. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A perspective view of electrical conductivity according to some embodiments of the present invention is shown; and Figure 2 A partial cross-sectional view of the conductivity according to some embodiments of the present invention is shown. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0020] In industrial motors and electric drive systems for new energy vehicles, current exists in the motor or electric drive system. Therefore, this utility model relates to a conductive bearing for motor or electric drive systems that has a relatively low cost and can prevent electro-corrosion failure.

[0021] According to an embodiment of the present invention, a conductive bearing is provided. Figure 1 A perspective view of electrical conductivity according to some embodiments of the present invention is shown; and Figure 2 A partial cross-sectional view of the conductivity according to some embodiments of the present invention is shown. (In conjunction with...) Figures 1 to 2As shown, the conductive bearing includes: an outer ring 1, an inner ring 2, multiple rollers 3, and a conductive ring 4. The inner ring 2 is coaxially disposed radially inside the outer ring 1; the multiple rollers 3 are radially disposed between the outer ring 1 and the inner ring 2; one radial side of the conductive ring 4 is fixedly disposed in one of the outer ring 1 and the inner ring 2, while the other radial side is rotatably disposed in direct or indirect contact with the other of the outer ring 1 and the inner ring 2.

[0022] The conductive ring 4 can be made by sheet metal stamping. The material of the conductive ring 4 can be spring steel, copper sheet or other conductive metal, so that the conductive ring 4 has a certain elasticity in the radial direction, so that the conductive ring 4 can always keep in contact with the outer ring 1 and the inner ring 2, and thus conduct electricity between the outer ring 1 and the inner ring 2.

[0023] In the conductive bearing of this invention, by setting a conductive ring 4, the outer ring 1 and the inner ring 2 of the bearing are electrically connected, which enables electrical conduction between the outer ring 1 and the inner ring 2 of the bearing, prevents electro-corrosion failure, and has low cost.

[0024] Furthermore, in some embodiments, such as Figure 1 and Figure 2 As shown, the conductive ring 4 includes: a radially extending portion 41 extending in the radial direction, a conductive ring fixing portion 42 extending from one radial side of the radially extending portion 41 toward the axial direction, and a conductive ring contact portion 43 disposed on the other radial side of the radially extending portion 41. The conductive ring fixing portion 42 is fixedly disposed on the radial side of one of the outer ring 1 and the inner ring 2, facing away from the roller 3; the conductive ring contact portion 43 is disposed in relative rotational contact with the other of the outer ring 1 and the inner ring 2, either directly or indirectly.

[0025] By providing the conductive ring fixing part 42, the conductive ring 4 can be conveniently and stably fixed to the radially outer side of the outer ring 1 or the radially inner side of the inner ring 2, allowing the conductive ring 4 to cover one side of the conductive bearing, facilitating the installation of the conductive ring 4 and ensuring reliable fixation. By providing the conductive ring contact part 43, the conductive ring 4 can maintain more stable direct or indirect contact with the outer ring 1 or the inner ring 2, thereby ensuring the conductivity of the conductive ring 4 between the outer ring 1 and the inner ring 2.

[0026] Figure 1 and Figure 2 The example shown only illustrates that the radially outer side of the conductive ring 4 is fixedly disposed on the outer ring 1, while the radially inner side of the conductive ring 4 is rotatably contacted with the inner ring 2. It is understood that this invention is not limited to... Figure 1 and Figure 2The embodiment shown can also be configured in other embodiments as follows: the inner radial side of the conductive ring 4 is fixedly disposed on the inner ring 2, and the outer radial side of the conductive ring 4 is rotatably contacted with the outer ring 1. This embodiment works similarly to the above embodiments, except that the conductive ring 4 is arranged in the opposite radial inner and outer directions, which will not be described further here. The following... Figure 1 and Figure 2 The illustrated embodiment will be described in detail below.

[0027] Furthermore, in some embodiments, such as Figure 1 and Figure 2 As shown, an installation groove 11 is provided on the radially outer side of the outer ring 1. The extended end of the conductive ring fixing part 42 is bent radially toward the outer ring 1 to form a conductive ring snap-fit ​​part 421. The conductive ring snap-fit ​​part 421 is snapped and fixed with the installation groove 11.

[0028] In other embodiments, an installation groove is provided on the radially outer side of the outer ring 1, and the conductive ring fixing part 42 protrudes radially toward the outer ring 1 to form a conductive ring snap-fit ​​part 421, which is engaged and fixed with the installation groove.

[0029] It is understood that in some other embodiments, an installation groove may be provided on the radially inner side of the inner ring 2, and the extended end of the conductive ring fixing part 42 may be provided with a conductive ring snap-fit ​​part 421 that is bent toward the inner ring 2 in the radial direction or protrudes toward the inner ring 2. The conductive ring snap-fit ​​part 421 on the radially inner side may be snapped and fixed with the installation groove on the radially inner side of the inner ring 2.

[0030] By setting the mounting groove 11 and the conductive ring snap-fit ​​part 421, the conductive ring 4 can be fixedly covered on the outer ring 1 (or the inner ring 2 in other embodiments) by interference fit through its own structural elasticity, which facilitates the installation of the conductive ring 4; the mounting groove 11 and the conductive ring snap-fit ​​part 421 snap-fit ​​and fix, so the conductive ring 4 can be reliably fixed to the outer ring 1 (or the inner ring 2 in other embodiments).

[0031] In some embodiments, such as Figure 1 As shown, the axially extending end of the conductive ring fixing part 42 is provided with a plurality of fixing part openings 423 that are circumferentially spaced and evenly distributed, and a fixing sub-part 422 is formed between two adjacent fixing part openings 423.

[0032] By setting the conductive ring fixing part 42 as a structure in which multiple fixing sub-parts 422 are arranged circumferentially, the conductive ring fixing part 42 can have good elastic deformation performance, which is beneficial for the conductive ring fixing part 42 to be fixed on the outer ring 1 (or the inner ring 2 in other embodiments) by interference fit through its own structural elasticity, which facilitates the installation of the conductive ring 4.

[0033] It is understood that in this embodiment, the extended ends of the plurality of fixing sub-parts 422 may be provided with a plurality of spaced conductive ring snap-fit ​​parts 421 that are bent radially toward the outer ring 1 (or the inner ring 2 in other embodiments) or protruded from the outer ring 1 (or the inner ring 2 in other embodiments). The conductive ring snap-fit ​​parts 421 are snap-fitted and fixed with the mounting groove.

[0034] In some embodiments, such as Figure 1 and Figure 2 As shown, the conductive ring contact portion 43 is configured as a C-shaped or S-shaped structure bent between the axial and radial directions. The extended end segment 43a of the conductive ring contact portion 43 is rotatably, directly, or indirectly in contact with the inner ring 2. Of course, in some other embodiments, the end segment 43a may be rotatably, directly, or indirectly in contact with the outer ring 1, which will not be elaborated further here.

[0035] Specifically, such as Figure 2 As shown, Figure 2 The conductive ring contact portion 43 shown is bent into a C-shaped structure. One end of the conductive ring contact portion 43 is formed into a terminal segment 43a on the radial inner side. This allows the conductive ring contact portion 43 to form radial elastic deformation performance through its own structure. This is beneficial for the conductive ring contact portion 43 to press the terminal segment 43a directly or indirectly onto the inner ring 2 through its own elasticity, thereby ensuring good contact between the conductive ring 4 and the inner ring 2.

[0036] In other embodiments, the conductive ring contact portion 43 may have more bending shapes, forming an S-shaped structure, which facilitates the conductive ring contact portion 43 to directly or indirectly press the end portion 43a onto the inner ring 2 through its own elasticity, thereby ensuring good contact between the conductive ring 4 and the inner ring 2. The conductive ring contact portion 43 may also be formed into other shapes that can have radial elasticity, which are not limited here.

[0037] Furthermore, such as Figure 1 As shown, the conductive ring contact portion 43 has a plurality of contact openings 431 that are spaced apart circumferentially and evenly distributed, and a contact portion 432 is formed between two adjacent contact openings 431.

[0038] The conductive ring contact portion 43 may be provided with a plurality of contact sub-portions 432 evenly spaced along the circumference. The contact sub-portions 432 form an axial line contact with the inner ring 2 and can rotate relative to it. In this way, when the conductive bearing is in an environment with lubricating oil, the line contact between the contact sub-portions 432 and the inner ring 2 not only ensures good electrical contact between the two, but also, as the contact sub-portions 432 rotate relative to the inner ring 2, they can scrape off the lubricating oil on the surface of the inner ring 2. Therefore, the risk of poor contact between the conductive ring 4 and the inner ring 2 due to the formation of an oil film between the conductive ring contact portion 43 and the inner ring 2 can be greatly reduced.

[0039] Of course, in some other embodiments, the conductive ring fixing part 42 of the conductive ring 4 is disposed on the radially inner side and fixedly disposed with the inner ring 2, and the conductive ring contact part 43 is disposed on the radially outer side, forming a plurality of contact parts 432 evenly spaced along the circumference. Other structural arrangements and working principles are similar to those in the above embodiments, and will not be described again here.

[0040] In some alternative embodiments, such as Figure 1 and Figure 2 As shown, the conductive bearing also includes a conductive contact ring 5. A conductive ring 4 is fixedly disposed on one of the outer ring 1 and the inner ring 2, and the conductive contact ring 5 is fixedly disposed on the other of the outer ring 1 and the inner ring 2. The conductive ring 4 and the conductive contact ring 5 are rotatably connected in contact. That is, the conductive ring 4 can indirectly contact the inner ring 2 (or the outer ring 1 in other embodiments) through the conductive contact ring 5.

[0041] Specifically, the conductive contact ring 5 can be made of materials such as graphite, copper, or aluminum alloy. The material of the conductive contact ring 5 needs to meet conductivity requirements, and the surface of the conductive contact ring 5 also needs to have a low coefficient of friction, resulting in a smooth surface. This reduces the friction between the conductive ring 4 and the conductive contact ring 5, thereby reducing wear and increasing the service life of the conductive bearing during operation.

[0042] To facilitate the installation of the conductive contact ring 5, in some embodiments, such as Figure 2 As shown, the inner ring 2 (or the outer ring 1 in other embodiments) of which the conductive contact ring 5 is fixedly provided has an annular recess for mounting the conductive contact ring 5 on the side facing the conductive ring 4 in the radial direction and at the position corresponding to the conductive ring 4 in the radial direction. The conductive contact ring 5 can be set as an independent annular structure, and the conductive contact ring 5 is set on the annular recess by interference fit.

[0043] by Figure 1 and Figure 2The illustrated embodiment is used as an example for detailed description. The conductive ring 4 is fixedly disposed on the outer ring 1, and the conductive contact ring 5 is fixedly disposed on the upper part of the inner ring 2. An annular recess 21 is provided on the radially outer side of the inner ring 2 corresponding to the conductive ring 4. In this technical solution, firstly, the outer ring 1, inner ring 2, roller 3, and roller cage of the conductive bearing need to be assembled together; then, the conductive contact ring 5 is installed on the annular recess 21 by an interference fit. Optionally, adhesive can be applied between the conductive contact ring 5 and the annular recess 21 to further fix the conductive contact ring 5; finally, the conductive ring 4 is fixed to the outer ring 1 by a snap-fit, thereby completing the assembly of the conductive bearing.

[0044] After the conductive bearing is assembled, the conductive ring 4 is fixed on the outer ring 1. At the same time, the contact part 432 of the conductive ring contact part 43 of the conductive ring 4 is in interference contact with the conductive contact ring 5 on the inner ring 1. The material selection of the conductive ring 4 and the conductive ring contact part 43 with C-shaped or S-shaped structure determine that it has elasticity in the radial direction, which can ensure that the conductive ring 4 and the conductive contact ring 5 are always in contact and maintain a certain contact force, thereby realizing the conductivity between the outer ring 1 and the inner ring 2 in the conductive bearing.

[0045] In other embodiments, the conductive contact ring 5 may be configured as a plated structure, formed by electroplating on the side of the inner ring 2 (or the outer ring 1 in other embodiments) facing the conductive ring 4 in the radial direction.

[0046] In the conductive bearing of this invention, a conductive ring 4 is provided to electrically connect the inner ring 2 and the outer ring 1 of the conductive bearing. This enables electrical conductivity between the inner ring 2 and the outer ring 1, preventing electro-corrosion failure and reducing cost. Furthermore, the conductive bearing also includes a conductive contact ring 5. The conductive ring 4 and the conductive contact ring 5 are rotatably in contact with each other. The conductive contact ring, made of graphite, copper, or aluminum alloy, has a smooth surface and a low coefficient of friction. While ensuring conductive contact, it reduces the friction between the relatively rotatably contacting conductive ring 4 and the conductive contact ring 5, allowing the conductive bearing to operate well and extending its service life.

[0047] While possible embodiments have been described exemplarily in the foregoing description, it should be understood that numerous variations of the embodiments exist through combinations of all known and readily conceived technical features and implementation methods. Furthermore, it should be understood that the exemplary embodiments are merely examples and do not in any way limit the scope, application, or construction of this invention. The foregoing description is more intended to provide those skilled in the art with technical guidance for transforming at least one exemplary embodiment, wherein various changes, particularly regarding the function and structure of the components, can be made without departing from the scope of the claims.

[0048] Appendix Label Table 1. Outer ring; 11. Mounting slot; 2. Inner ring; 21. Annular sunken platform; 3. Roller; 4. Conductive coil; 41. Radial extension; 42. Conductive coil fixing part; 421. Conductive coil snap-fit ​​part; 422. Fixing part; 423. Fixing part opening; 43. Conductive coil contact part; 43a. End section; 431. Contact part opening; 432. Contact part; 5. Conductive contact ring.

Claims

1. A conductive bearing, characterized in that, include: Outer ring (1); The inner ring (2) is coaxially disposed on the radially inner side of the outer ring (1); Multiple rollers (3) are radially disposed between the outer ring (1) and the inner ring (2); as well as The conductive ring (4) includes: a radially extending portion (41) extending in the radial direction, a conductive ring fixing portion (42) extending from one radial side of the radially extending portion (41) toward the axial direction, and a conductive ring contact portion (43) disposed on the other radial side of the radially extending portion (41). The conductive ring fixing part (42) is fixedly disposed on the radial side of one of the outer ring (1) and the inner ring (2) facing away from the roller (3); the conductive ring contact part (43) is disposed in relative rotation with the other of the outer ring (1) and the inner ring (2) in direct or indirect contact.

2. The conductive bearing according to claim 1, characterized in that, An installation groove is provided on the radially outer side of the outer ring (1) or the radially inner side of the inner ring (2). The extended end of the conductive ring fixing part (42) is bent radially toward the outer ring (1) or the inner ring (2) to form a conductive ring snap-fit ​​part (421). The conductive ring snap-fit ​​part (421) is snapped and fixed with the installation groove.

3. The conductive bearing according to claim 1, characterized in that, An installation groove is provided on the radially outer side of the outer ring (1) or the radially inner side of the inner ring (2). The conductive ring fixing part (42) protrudes radially toward the outer ring (1) or the inner ring (2) to form a conductive ring snap-fit ​​part (421). The conductive ring snap-fit ​​part (421) is engaged and fixed with the installation groove.

4. The conductive bearing according to claim 1, characterized in that, The axially extending end of the conductive ring fixing part (42) is provided with a plurality of fixing part openings (423) that are circumferentially spaced and evenly distributed, and a fixing sub-part (422) is formed between two adjacent fixing part openings (423).

5. The conductive bearing according to claim 1, characterized in that, The conductive ring contact portion (43) is configured as a C-shaped structure or an S-shaped structure bent between the axial direction and the radial direction, wherein the extended end portion (43a) of the conductive ring contact portion (43) is configured to rotatably contact the other of the outer ring (1) and the inner ring (2), directly or indirectly.

6. The conductive bearing according to claim 1, characterized in that, The conductive ring contact portion (43) has a plurality of contact openings (431) that are spaced apart circumferentially and evenly distributed, and a contact sub-portion (432) is formed between two adjacent contact openings (431).

7. The conductive bearing according to claim 1, characterized in that, Also includes: A conductive contact ring (5) is fixedly disposed on the other of the outer ring (1) and the inner ring (2); The conductive ring (4) and the conductive contact ring (5) are rotatably connected in contact.

8. The conductive bearing according to claim 7, characterized in that, The outer ring (1) and the inner ring (2) are respectively provided with an annular recess for mounting the conductive contact ring (5) on the side facing the conductive ring (4) in the radial direction and at a position corresponding to the conductive ring (4) in the radial direction. The conductive contact ring (5) is configured as an independent annular structure and is set on the annular recess by interference fit.

9. The conductive bearing according to claim 7, characterized in that, The conductive contact ring (5) is configured with a plating structure, which is formed by electroplating on the other side of the outer ring (1) and the inner ring (2) that is radially toward the conductive ring (4).

10. The conductive bearing according to claim 7, characterized in that, The conductive contact ring (5) is made of graphite, copper or aluminum alloy.

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