Insulation bearing and insulation bearing assembly

Abstract

The insulating bearing comprises an outer ring, an inner ring, a rolling body and a retainer, the outer ring comprises a main body part and a step part, the step part is located at the axial end of the main body part, and the periphery of the step part retracts inwards in the radial direction relative to the periphery of the main body part; the periphery of the main body part, the periphery of the step part and a connecting surface connecting the main body part and the step part are provided with insulating layers; and the step part is used for mounting an O-shaped ring. According to the insulating bearing and the insulating bearing assembly, the O-shaped ring can be installed on the step part to increase friction, so that the outer ring is prevented from running, and injection molding demolding is not affected.

Description

Technical Field

[0001] The present application relates to the technical field of insulating bearings, and more specifically, to an insulating bearing and an insulating bearing assembly. Background Art

[0002] If installed in an environment with current, the bearing is prone to electrical corrosion failure, so the bearing needs to have insulation function. Figure 1 As shown, in related art, an insulating layer 50 is applied to the outer ring 10 to prevent current from flowing through the bearing, thereby preventing electrocorrosion failure caused by electron accumulation between the outer ring 10, inner ring 20, retainer 40, and rolling elements 30. Insulated bearings are often used at the floating end of motors. The outer ring 10 and the bearing seat have a clearance fit, making the outer ring 10 susceptible to lap during operation. Due to limitations in the design and injection molding process, it is not possible to add a U-shaped groove to the outer ring 10 of insulated bearings and to incorporate friction elements within the U-shaped groove to prevent lap. Utility Model Content

[0003] The purpose of this application is to provide an insulating bearing and an insulating bearing assembly, which can install an O-ring on the step portion to increase friction, thereby preventing the outer ring from running, and does not affect injection molding demolding.

[0004] The present application provides an insulating bearing, comprising an outer ring, an inner ring, rolling elements, and a retaining frame, wherein the outer ring comprises:

[0005] the main body; and

[0006] A step portion; the step portion is located at the axial end of the main body portion, the outer periphery of the step portion is radially inwardly retracted relative to the outer periphery of the main body portion, the outer periphery of the main body portion, the outer periphery of the step portion and the connecting surface connecting the two all have an insulating layer, and the step portion is used to install an O-ring.

[0007] In the embodiment of the present application, the outer surface of the insulating layer of the step portion is retracted radially inward relative to the outer surface of the insulating layer of the main body portion.

[0008] In the embodiment of the present application, the connecting surface is perpendicular to the outer periphery of the main body portion, and the connecting surface is perpendicular to the outer periphery of the step portion.

[0009] In the embodiment of the present application, the end portion of the main body away from the step portion has the insulating layer, and the end portion of the step portion away from the main body has the insulating layer.

[0010] An embodiment of the present application further provides an insulating bearing assembly, which includes an O-ring and the above-mentioned insulating bearing.

[0011] In the embodiment of the present application, the O-ring is located on the outer periphery of the step portion, and the O-ring is interference fit with the outer periphery of the step portion.

[0012] In the embodiment of the present application, the outer periphery of the O-ring protrudes radially outward relative to the outer periphery of the main body.

[0013] In an embodiment of the present application, the insulating bearing assembly also includes a bearing seat, the outer periphery of the main body is matched with the inner periphery of the bearing seat, there is an accommodating space between the outer periphery of the step portion and the inner periphery of the bearing seat, and the O-ring is located in the accommodating space.

[0014] In the embodiment of the present application, the O-ring is interference fit with the inner circumference of the bearing seat.

[0015] In the insulating bearing and insulating bearing assembly of the present application, the outer ring of the insulating bearing includes a main body and a step portion. The outer periphery of the main body, the outer periphery of the step portion, and the connecting surface connecting the two are all provided with an insulating layer to prevent current from passing through the bearing, thereby avoiding electrical corrosion failure. The outer periphery of the step portion is radially inwardly indented relative to the outer periphery of the main body, and the indented step portion can provide installation space for the O-ring. The O-ring is squeezed between the bearing seat and the step portion, increasing the friction between the outer ring and the bearing seat and preventing the outer ring from running in circles. During the axial floating process of the insulating bearing, the O-ring can roll axially, changing sliding friction to rolling friction, and avoiding friction noise. At the same time, the step portion is located at the axial end of the main body, which is convenient for processing and does not affect injection molding demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of an insulating bearing in related art;

[0017] Figure 2 This is a schematic structural diagram of an insulating bearing in an embodiment of the present application;

[0018] Figure 3 Schematic diagram of the structure of the insulating bearing assembly in the embodiment of the present application. DETAILED DESCRIPTION

[0019] The following detailed description and accompanying drawings are used to illustrate the principles of the present application. The present application is not limited to the preferred embodiments described, and the scope of protection of the present application is defined by the claims.

[0020] like Figure 2 and Figure 3 As shown, an embodiment of the present application provides an insulating bearing, which includes an outer ring 100 , an inner ring 200 , rolling elements 300 and a retaining frame 400 , wherein the rolling elements 300 are supported between the outer ring 100 and the inner ring 200 by the retaining frame 400 .

[0021] The outer ring 100 includes a main body 110 and a step portion 120. The main body 110 and the step portion 120 may be an integral structure.

[0022] The outer circumference of the stepped portion 120 is radially inwardly recessed relative to the outer circumference of the main body 110. Stepped portion 120 is used to accommodate the O-ring 600. In other words, the radially inward recessed space of the outer circumference of the stepped portion 120 provides space for the O-ring 600 to be installed. After the insulating bearing is installed in the bearing seat 700, the O-ring 600 is squeezed between the bearing seat 700 and the stepped portion 120, increasing friction between the outer ring 100 and the bearing seat 700 and preventing the outer ring 100 from spinning.

[0023] The step portion 120 is located at an axial end of the main body 110, and is located at at least one axial end. That is, the step portion 120 can be provided at only one end of the main body 110, or at both ends of the main body 110. The location of the step portion 120 at an axial end of the main body 110 facilitates processing and does not affect demolding during the injection molding process.

[0024] The outer periphery of the main body 110 , the outer periphery of the step portion 120 , and the connection surface between the two are all provided with an insulating layer 500 . The insulating layer 500 prevents current from passing through the bearing, thereby avoiding electrical corrosion failure.

[0025] In the embodiment of the present application, the outer surface of the insulating layer 500 of the step portion 120 is radially inwardly retracted relative to the outer surface of the insulating layer 500 of the main body portion 110. The insulating layer 500 is an insulating material layer attached to the outermost layer of the outer ring 100.

[0026] The insulating layer 500 can be considered as a part of the outer ring 100 .

[0027] Before attaching the insulating layer 500, the outer periphery of the step portion 120 is radially inwardly recessed relative to the outer periphery of the main body 110. After attaching the insulating layer 500, the outer surface of the insulating layer 500 on the step portion 120 becomes the outer periphery of the step portion 120, while the outer surface of the insulating layer 500 on the main body 110 becomes the outer periphery of the main body 110. Therefore, after attaching the insulating layer 500, the outer periphery of the step portion 120 is also radially inwardly recessed relative to the outer periphery of the main body 110. In other words, the insulating layer 500 is a layer of insulating material with a uniform thickness. The installation of the insulating layer 500 does not affect the installation space for the O-ring 600 formed by the radial inward recess of the step portion 120.

[0028] In this embodiment, the connection surface is perpendicular to the outer periphery of the main body 110 and the outer periphery of the stepped portion 120. After the insulating bearing is installed, the connection surface faces the bottom of the bearing seat 700. The connection surface and the bottom of the bearing seat 700 form a stop for the axial movement of the O-ring 600.

[0029] In the embodiment of the present application, the end of the main body 110 away from the stepped portion 120 is provided with an insulating layer 500, and the end of the stepped portion 120 away from the main body 110 is also provided with an insulating layer 500. In other words, the insulating layer 500 not only covers the radial outer circumference of the outer ring 100, but also covers at least part of the surface of the axial end of the outer ring 100, thereby providing better insulation.

[0030] The present application also provides an insulating bearing assembly. This insulating bearing assembly includes an O-ring 600 and the aforementioned insulating bearing. Specifically, the O-ring 600 is mounted on the stepped portion 120 of the insulating bearing to form the insulating bearing assembly. The O-ring 600 is made of rubber and increases the friction between the outer ring 100 and the bearing seat 700. The O-ring 600 has a circular cross-section, allowing it to roll axially during axial floating of the insulating bearing, converting sliding friction into rolling friction and preventing friction noise.

[0031] The O-ring 600 is located on the outer periphery of the step portion 120 and has an interference fit with the outer periphery of the step portion 120. The inner periphery of the O-ring 600 is sleeved on the outer periphery of the step portion 120, and the inner periphery of the O-ring 600 is in a stretched state.

[0032] The outer periphery of the O-ring 600 protrudes radially outward relative to the outer periphery of the main body 110. This protruding state occurs before the bearing assembly is installed in the bearing seat 700. The outwardly protruding portion of the O-ring 600 provides compression when installed in the bearing seat 700. After the bearing assembly is installed in the bearing seat 700, the outer periphery of the O-ring 600 is compressed, and the O-ring 600 is squeezed between the step 120 and the bearing seat 700.

[0033] like Figure 3 As shown, an embodiment of the present application further provides an insulating bearing assembly, which further includes a bearing seat 700. The insulating bearing assembly comprises an O-ring 600, a bearing seat 700, and the insulating bearing described above. Specifically, the O-ring 600 is mounted on the step 120 of the insulating bearing, which is then mounted on the bearing seat 700 to form the insulating bearing assembly.

[0034] The outer periphery of the insulating bearing's main body 110 fits within the inner periphery of the bearing seat 700 . An accommodating space is defined between the outer periphery of the step portion 120 and the inner periphery of the bearing seat 700 . The O-ring 600 is positioned within the accommodating space. This accommodating space serves as an installation space for the O-ring 600 .

[0035] The O-ring 600 forms an interference fit with the inner circumference of the bearing seat 700. The O-ring 600 is squeezed into the space between the outer circumference of the stepped portion 120 and the inner circumference of the bearing seat 700. Made of rubber, the O-ring 600 increases friction between the outer ring 100 and the bearing seat 700. The O-ring 600 has a circular cross-section, allowing it to roll axially during the axial floating motion of the insulating bearing, converting sliding friction into rolling friction and preventing friction noise.

[0036] Therefore, in the insulating bearing and insulating bearing assembly of the present application, the outer periphery of the main body 110, the outer periphery of the step portion 120, and the connecting surface connecting the two are all provided with an insulating layer 500 to prevent current from passing through the bearing, thereby avoiding electrical corrosion failure. The outer periphery of the step portion 120 is radially inwardly retracted relative to the outer periphery of the main body 110, and the retracted step portion 120 can provide installation space for the O-ring 600. The O-ring 600 is squeezed between the bearing seat 700 and the step portion 120, increasing the friction between the outer ring 100 and the bearing seat 700 and preventing the outer ring 100 from running in circles. During the axial floating process of the insulating bearing, the O-ring 600 can roll axially, changing sliding friction to rolling friction, and avoiding friction noise. At the same time, the step portion 120 is located at the end of the main body 110, which is convenient for processing and does not affect injection molding demolding.

[0037] In the embodiment of the present application, the insulating bearing can be sold as an integral component, that is, the manufacturer assembles the various parts into the insulating bearing and sells it as an integral component. The user can purchase the insulating bearing, O-ring 600 and bearing seat 700 separately and then assemble them.

[0038] In another embodiment of the present application, the insulating bearing assembly formed by installing the O-ring 600 on the step portion 120 of the insulating bearing can be sold as an integral component. Users can purchase the bearing assembly and the bearing seat 700 separately and then assemble them.

[0039] In another embodiment of the present application, the insulating bearing assembly formed by installing the O-ring 600 on the step portion 120 of the insulating bearing and then installing it on the bearing seat 700 can be sold as an integral component. Users can directly purchase the bearing assembly for use.

[0040] As mentioned above, although the exemplary embodiments of the present application have been described with reference to the accompanying drawings, the present application is not limited to the above specific embodiments, and the scope of protection of the present application should be defined by the claims and their equivalents.

[0041] Reference Signs List

[0042] Outer ring 100,10

[0043] Main body 110

[0044] Step portion 120

[0045] Inner ring 200,20

[0046] Rolling element 300,30

[0047] Cage 400,40

[0048] Insulation layer 500,50

[0049] O-ring 600

[0050] Bearing seat 700.

Claims

1. An insulating bearing, characterized in that: The insulating bearing comprises: an outer ring (100), an inner ring (200), a rolling element (300) and a retaining frame (400), wherein the outer ring (100) comprises: a main body (110); and A step portion (120); the step portion (120) is located at an axial end of the main body (110); the outer periphery of the step portion (120) is radially inwardly retracted relative to the outer periphery of the main body (110); the outer periphery of the main body (110), the outer periphery of the step portion (120), and the connecting surface connecting the two all have an insulating layer (500); the step portion (120) is used to install an O-ring (600).

2. The insulating bearing according to claim 1, wherein: An outer surface of the insulating layer (500) of the step portion (120) is retracted radially inward relative to an outer surface of the insulating layer (500) of the main body portion (110).

3. The insulating bearing according to claim 1, wherein: The connecting surface and the outer periphery of the main body (110) are both perpendicular, as are the connecting surface and the outer periphery of the step portion (120).

4. The insulating bearing according to claim 1, wherein The end portion of the main body (110) away from the step portion (120) has the insulating layer (500), and the end portion of the step portion (120) away from the main body (110) has the insulating layer (500).

5. An insulating bearing assembly, characterized in that: The insulating bearing assembly comprises an O-ring (600) and the insulating bearing according to any one of claims 1-4.

6. The insulating bearing assembly according to claim 5, wherein: The O-ring (600) is located on the outer periphery of the step portion (120), and the O-ring (600) is interference-fitted with the outer periphery of the step portion (120).

7. The insulating bearing assembly according to claim 6, wherein: The outer periphery of the O-ring (600) protrudes radially outward relative to the outer periphery of the main body (110).

8. The insulating bearing assembly according to claim 7, wherein: The insulating bearing assembly further comprises a bearing seat (700), the outer periphery of the main body (110) cooperates with the inner periphery of the bearing seat (700), an accommodating space is provided between the outer periphery of the step portion (120) and the inner periphery of the bearing seat (700), and the O-ring (600) is located in the accommodating space.

9. The insulating bearing assembly according to claim 8, wherein: The O-ring (600) is interference-fitted with the inner periphery of the bearing seat (700).

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