Insulated bearing and method for manufacturing the same

Abstract

The present application provides an insulating bearing and a manufacturing method thereof. In the insulating bearing provided by the present application, by providing a first elastic insulator protruding from the surface of the insulating layer, after the insulating bearing is installed in the installation groove in the housing end cover, the insulating layer can be prevented from contacting the groove wall of the installation groove, thereby avoiding damage to the insulating layer. Moreover, during the process of installing the insulating bearing in the installation groove, the first elastic insulator will first contact the groove wall of the installation groove, thereby avoiding damage to the insulating layer.

Description

Technical Field

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

[0002] During the operation of the motor, shaft current will be generated, and the shaft current will form a circuit through the shaft, bearing and housing end cover. The shaft current will cause electrocorrosion on the rolling element surface of the bearing, damage the bearing raceway, thus causing motor failure and affecting the stability of the motor operation.

[0003] At present, some manufacturers form an insulating layer on the outer surface of the bearing outer ring to prevent the bearing from being conductive with the housing end cover, thereby blocking the shaft current circuit.

[0004] In the process of installing the bearing in the installation groove in the housing end cover, in order to prevent the insulation layer from being scratched by the groove wall, it is usually necessary to set the inner diameter of the installation groove larger than the outer diameter of the bearing outer ring, which results in a certain gap between the insulation layer and the groove wall of the installation groove. During the operation of the motor, due to vibration, the bearing will slide or move in the installation groove, and the insulation layer will easily rub against the groove wall, causing wear, scratches, breakage or falling off, resulting in the insulation between the bearing and the housing end cover failing and no longer being able to block the shaft current. In addition, the movement of the bearing will affect the stability of the motor. Summary of the invention

[0005] The purpose of the present application is to overcome or at least alleviate the deficiencies of the above-mentioned prior art and to provide an insulating bearing and a method for manufacturing the same.

[0006] According to one aspect of the present application, an insulating bearing is provided, comprising: an outer ring, an inner ring, and a rolling element located between the outer ring and the inner ring, wherein an insulating layer is formed on the outer surface of the outer ring, and characterized in that:

[0007] At least one annular groove is formed on the outer circumferential surface of the outer ring, a first elastic insulator is arranged in the annular groove, and the first elastic insulator protrudes from the surface of the insulating layer.

[0008] In at least one embodiment, the outer diameter of the outer ring is smaller than the inner diameter of the mounting groove in the housing end cover for mounting the insulating bearing.

[0009] The first elastic insulator is ring-shaped, and the outer diameter of the first elastic insulator is greater than the inner diameter of the mounting groove.

[0010] In at least one embodiment, at least two axial grooves are evenly distributed on the outer circumferential surface of the outer ring, and a second elastic insulator is disposed in the axial groove, and the second elastic insulator protrudes from the surface of the insulating layer.

[0011] In at least one embodiment, the upper surface of the second elastic insulator does not protrude beyond the upper surface of the first elastic insulator.

[0012] In at least one embodiment, a recess is formed on the bottom or wall of the annular groove, and the first elastic insulator includes a first protrusion, which is located in the recess and matches the recess; and / or,

[0013] A recessed portion is formed on the groove bottom or the groove wall of the axial groove, and the second elastic insulator includes a second protruding portion located in the recessed portion.

[0014] In at least one embodiment, the first elastic insulator and the second elastic insulator include at least one of fluorine-containing olefin fluororubber, perfluoroether rubber, fluorinated phosphazene rubber, perfluoroalkyl triazine rubber, fluorosilicone rubber, hydrogenated nitrile rubber, and modified silicone rubber.

[0015] In at least one embodiment, the first elastic insulator includes at least two first sub-segments and at least two second sub-segments, and the first sub-segments and the second sub-segments are alternately arranged along the circumference of the outer ring.

[0016] The elastic moduli of the first subsegment and the second subsegment are equal, and the upper surface of the first subsegment is protruding from the upper surface of the second subsegment.

[0017] In at least one embodiment, the first elastic insulator includes at least two first sub-segments and at least two second sub-segments, and the first sub-segments and the second sub-segments are alternately arranged along the circumference of the outer ring.

[0018] The upper surface of the first subsegment is flush with the upper surface of the second subsegment, and the elastic modulus of the first subsegment is greater than the elastic modulus of the second subsegment.

[0019] According to another aspect of the present application, a method for manufacturing an insulating bearing is provided, comprising:

[0020] forming an insulating layer on the outer surface of the outer ring;

[0021] At least one annular groove is formed on the outer peripheral surface of the outer ring;

[0022] The first elastic insulator is partially installed in the annular groove so that the first elastic insulator protrudes from the surface of the insulating layer.

[0023] In at least one embodiment, forming a first elastic insulator partially within the annular groove includes:

[0024] A first elastic insulator in an annular shape is manufactured, and the first elastic insulator is sleeved into the annular groove; or,

[0025] The elastic insulating material is directly applied into the annular groove by an extrusion molding process to form a first elastic insulator.

[0026] In the insulating bearing provided in the present application, by arranging a first elastic insulator protruding from the surface of the insulating layer, after the insulating bearing is installed in the mounting groove in the housing end cover, it is possible to prevent relative sliding or displacement between the bearing and the housing end cover due to vibration during the operation of the motor, and at the same time prevent the insulating layer from contacting the groove wall of the mounting groove, thereby avoiding damage to the insulating layer.

[0027] Furthermore, when the insulating bearing is installed in the installation groove, the first elastic insulator will first contact the groove wall of the installation groove, thereby avoiding damage to the insulating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of a housing end cover for installing an insulating bearing provided in the first embodiment of the present application.

[0029] Figure 2 It is a schematic structural diagram of an insulating bearing provided according to the first embodiment of the present application.

[0030] Figure 3 yes Figure 2 Side view of the insulated bearing shown.

[0031] Figure 4 yes Figure 3 The schematic diagram of the structure of the insulating bearing after removing the first elastic insulator is shown.

[0032] Figure 5 yes Figure 4 Axial cross-sectional view of the middle annular groove.

[0033] Figure 6 It is a schematic structural diagram of an insulating bearing provided according to the second embodiment of the present application.

[0034] Figure 7 yes Figure 6 The schematic diagram of the structure of the insulating bearing shown is a schematic diagram of the structure of the insulating bearing after removing the first elastic insulator and the second elastic insulator.

[0035] Figure 8 It is a schematic structural diagram of the insulating bearing provided in the third embodiment of the present application after removing the first elastic insulator.

[0036] Fig. 9 It is a partial schematic diagram of a first elastic insulator in an insulating bearing provided according to the third embodiment of the present application.

[0037] Fig.10 It is a schematic structural diagram of a first elastic insulator in an insulating bearing provided according to the fourth embodiment of the present application.

[0038] Fig.11It is a schematic structural diagram of another first elastic insulator in an insulating bearing provided according to the fourth embodiment of the present application.

[0039] Description of reference numerals:

[0040] 100- housing end cover; 101- mounting slot;

[0041] 11-outer ring; 111-annular groove; 112-axial groove; 113-recess;

[0042] 12-inner ring; 121-shaft hole; 13-rolling element; 14-insulating layer;

[0043] 15-first elastic insulator; 151-first convex portion; 152-first subsection; 153-second subsection;

[0044] 16- Second elastic insulator. DETAILED DESCRIPTION

[0045] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0046] Unless otherwise specified, the axial, radial and circumferential directions mentioned in this application are all referenced to the axial, radial and circumferential directions of the insulating bearing.

[0047] First embodiment

[0048] Reference Figures 1 to 5 , introduces the insulating bearing provided by the first embodiment of the present application.

[0049] In this embodiment, the insulating bearing comprises: an outer ring 11, an inner ring 12 and a rolling element 13. The rolling element 13 is located between the outer ring 11 and the inner ring 12 to achieve relative rotation between the outer ring 11 and the inner ring 12. The inner ring 12 is formed with an axial hole 121 for the rotation shaft of the motor to pass through.

[0050] An insulating layer 14 is formed on the outer surface of the outer ring 11. In the present embodiment, the insulating layer 14 covers the outer peripheral surface and the axial end surface of the outer ring 11.

[0051] like Figure 4 As shown, an annular groove 111 is formed on the outer circumference of the outer ring 11 , and the center of the annular groove 111 coincides with the center of the outer ring 11 .

[0052] In this embodiment, there are two annular grooves 111. The present application does not specifically limit the number of annular grooves 111, and those skilled in the art can set the specific number of annular grooves 111 according to actual needs.

[0053] like Figure 2 and Figure 3 As shown, the first elastic insulator 15 is partially located in the annular groove 111, so that the first elastic insulator 15 protrudes from the surface of the insulating layer 14. After the insulating bearing is installed in the mounting groove 101, the insulating layer 14 can be prevented from contacting the groove wall of the mounting groove 101 in the housing end cover 100, and the insulating layer 14 can be prevented from being damaged during the operation of the motor.

[0054] Moreover, a certain gap is formed between the insulating layer 14 and the groove wall, which can ensure the insulation reliability of the insulating bearing and the housing end cover 100.

[0055] At the same time, since the first elastic insulator 15 protrudes from the surface of the insulating layer 14, during the process of installing the insulating bearing in the installation groove 101, it can also prevent the insulating layer 14 from directly contacting the groove wall of the installation groove 101, thereby avoiding damage to the insulating layer 14 during the installation process.

[0056] In this embodiment, the outer diameter R2 of the outer ring 11 is smaller than the inner diameter R1 of the mounting groove 101, and the outer diameter R3 of the annular first elastic insulator 15 is larger than the inner diameter R1 of the mounting groove 101. Therefore, after the insulating bearing is installed in the mounting groove 101, the first elastic insulator 15 will be in interference contact with the groove wall, so that the insulating bearing is fixed in the mounting groove 101, which can prevent the insulating bearing from moving, especially prevent the outer ring 11 from sliding relative to the mounting groove 101, thereby ensuring the stability of the motor operation.

[0057] Optionally, the material of the first elastic insulator 15 includes rubber, which can ensure the anti-slip performance of the first elastic insulator 15 and further prevent the outer ring 11 from sliding relative to the installation groove 101.

[0058] Optionally, the material of the first elastic insulator 15 may also include at least one of fluorinated olefin fluororubber, perfluoroether rubber, fluorinated phosphazene rubber, perfluoroalkyl triazine rubber, fluorosilicone rubber, hydrogenated nitrile rubber and modified silicone rubber. These materials have high temperature resistance, grease resistance and wear resistance, and therefore can ensure the service life of the first elastic insulator 15 and expand the application scenarios of insulating bearings.

[0059] In this embodiment, since the first elastic insulator 15 has a certain elasticity, during the process of installing the insulating bearing in the installation groove 101, the insulating bearing can be installed in the installation groove 101 by squeezing the first elastic insulator 15 to deform it, without affecting the assembly of the insulating bearing.

[0060] like Figure 5As shown, in this embodiment, the upper width of the annular groove 111 is smaller than the lower width, or in other words, the closer to the outer peripheral side, the smaller the axial width of the annular groove 111. The portion of the first elastic insulator 15 located in the annular groove 111 is adapted to the shape of the annular groove 111, which helps to improve the connection strength between the first elastic insulator 15 and the outer ring 11, can prevent the first elastic insulator 15 from detaching, and ensure the stability of the insulating bearing.

[0061] In this embodiment, the depth d of the annular groove 111 is not less than 0.1 mm and not more than 2 mm, so as to ensure that the annular groove 111 has sufficient volume to accommodate the first elastic insulator 15, thereby ensuring the connection strength between the first elastic insulator 15 and the outer ring 11 to prevent the first elastic insulator 15 from falling off.

[0062] Optionally, the groove bottom and groove wall of the annular groove 111 are covered by the insulating layer 14. Such a configuration can further improve the insulation reliability of the insulating bearing, and when the first elastic insulator 15 is partially damaged and a portion of the annular groove 111 is exposed, the exposed groove bottom and groove wall can be prevented from being connected to the groove wall of the mounting groove 101.

[0063] This embodiment also provides a method for manufacturing an insulating bearing, comprising the following steps:

[0064] S1, forming an insulating layer 14 on the outer surface of the outer ring 11;

[0065] S2, forming at least one annular groove 111 on the outer peripheral surface of the outer ring 11;

[0066] S3, forming a first elastic insulator 15 partially located in the annular groove 111, so that the first elastic insulator 15 protrudes from the surface of the insulating layer (14).

[0067] In this embodiment, there are two ways to manufacture the first elastic insulator 15. In the first way, the first elastic insulator 15 in an annular shape can be manufactured separately, and then the first elastic insulator 15 is sleeved into the annular groove 111, thereby obtaining an insulating bearing. In the second way, after the annular groove 111 is formed, an elastic insulating material can be directly applied to the annular groove 111 through an extrusion molding process, and the elastic insulating material is cooled and solidified to form the first elastic insulator 15, thereby obtaining an insulating bearing.

[0068] Optionally, the order of step S1 and step S2 can be swapped, that is, the annular groove 111 is formed first, and then the insulating layer 14 is formed, so as to ensure the integrity of the insulating layer 14 and make the bottom and wall of the annular groove 111 covered by the insulating layer 14.

[0069] Second embodiment

[0070] Reference Figure 6 to Figure 7 , introduces the insulating bearing provided by the second embodiment of the present application. The second embodiment is a variation of the first embodiment, and the components with the same or similar structures or functions as those in the first embodiment are marked with the same reference numerals, and the detailed description of these components is omitted.

[0071] In this embodiment, a plurality of concave portions 113 distributed in the circumferential direction are formed at the bottom of the annular groove 111. The first elastic insulator 15 includes a first convex portion 151 adapted to the concave portion 113, so that the first convex portion 151 can be inserted and snapped into the concave portion 113. This helps to improve the connection strength between the first elastic insulator 15 and the annular groove 111, and can prevent the first elastic insulator 15 from falling off.

[0072] Optionally, the upper width of the recess 113 is smaller than the lower width, so as to improve the connection strength between the first convex portion 151 and the recess 113 , and further improve the connection strength between the first elastic insulator 15 and the outer ring 11 .

[0073] Third embodiment

[0074] Reference Figures 8 to 9 , introduces the insulating bearing provided by the second embodiment of the present application. The second embodiment is a variation of the first embodiment, and the components with the same or similar structures or functions as those in the first embodiment are marked with the same reference numerals, and the detailed description of these components is omitted.

[0075] In this embodiment, if Figures 8 to 9 As shown, a plurality of axial grooves 112 are formed on the outer circumferential surface of the outer ring 11 of the insulating bearing. Second elastic insulators 16 are arranged in the axial grooves 112 , and the second elastic insulators 16 protrude from the surface of the insulating layer 14 .

[0076] like Figure 8 As shown, the extension direction of the second elastic insulator 16 is parallel to the axial direction of the insulating bearing. After the insulating bearing is installed in the mounting groove 101, the second elastic insulator 16 can contact the groove wall of the mounting groove 101, thereby increasing the contact area between the insulating bearing and the groove wall, improving the fixing strength between the insulating bearing and the mounting groove 101, and further reducing the probability of movement of the insulating bearing.

[0077] At the same time, the probability of the insulating layer 14 contacting the groove wall can be further reduced, which helps to reduce the risk of damage to the insulating layer 14 .

[0078] In this embodiment, the material of the second elastic insulator 16 can refer to the material of the first elastic insulator 15. Optionally, the material of the second elastic insulator 16 is the same as that of the first elastic insulator 15.

[0079] Optionally, the first elastic insulator 15 and the second elastic insulator 16 are an integrally formed structure, thereby helping to ensure the overall structural strength of the first elastic insulator 15 and the second elastic insulator 16 and reducing the risk of the first elastic insulator 15 and the second elastic insulator 16 falling off.

[0080] In this embodiment, all the axial grooves 112 are evenly distributed along the outer circumference of the outer ring 11 , that is, all the second elastic insulators 16 are evenly distributed along the outer circumference of the outer ring 11 , which helps to improve the stability of the insulating bearing.

[0081] In this embodiment, the upper surface of the second elastic insulator 16 is flush with the upper surface of the first elastic insulator 15. After the insulating bearing is installed in the mounting groove 101, the second elastic insulator 16 and the first elastic insulator 15 can both contact the groove wall of the mounting groove 101, so that the second elastic insulator 16 and the first elastic insulator 15 both play the role of supporting the outer ring 11, and the supporting force of the second elastic insulator 16 and the first elastic insulator 15 is the same.

[0082] Of course, the upper surface of the second elastic insulator 16 may also be lower than the upper surface of the first elastic insulator 15 . Such a configuration can facilitate the installation of the insulating bearing in the installation groove 101 .

[0083] Optionally, the upper width of the axial groove 112 is also smaller than the lower width, thereby helping to reduce the risk of the second elastic insulator 16 falling off.

[0084] Optionally, along the axial direction of the insulating bearing, the length of the axial groove 112 is smaller than the length of the outer ring 11 to prevent both ends of the second elastic insulator 16 from protruding from the axial end surface of the outer ring 11 .

[0085] like Fig. 9 As shown, when the outer ring 11 is formed with two annular grooves 111, the axial groove 112 is located between the two annular grooves 111. The axial groove 112 is connected to the annular groove 111 to facilitate the installation of the first elastic insulator 15 and the second elastic insulator 16 of the integrally formed structure.

[0086] In this embodiment, the depth d of the axial groove 112 is not less than 0.1 mm and not more than 2 mm, so as to ensure that the axial groove 112 has enough volume to accommodate the second elastic insulator 16 , thereby ensuring the connection strength between the second elastic insulator 16 and the outer ring 11 .

[0087] Optionally, a recess 113 may be formed at the bottom or the wall of the axial groove 112. Accordingly, the second elastic insulator 16 includes a second protrusion (not shown in the figure) matching the recess 113 so that the second protrusion can be inserted into the recess 113, thereby further improving the connection strength between the second elastic insulator 16 and the outer ring 11.

[0088] Optionally, the groove bottom and groove wall of the axial groove 112 are covered by the insulating layer 14 to ensure the insulation reliability of the insulating bearing.

[0089] Fourth embodiment

[0090] Reference Figure 10 to Figure 11 , introduces the insulating bearing provided in the fourth embodiment of the present application. The fourth embodiment is a variation of the first embodiment, and the components having the same or similar structures or functions as those in the first embodiment are marked with the same reference numerals, and the detailed description of these components is omitted.

[0091] In this embodiment, the first elastic insulator 15 includes two different sub-segments. For example, the first elastic insulator 15 includes a plurality of first sub-segments 152 and a plurality of second sub-segments 153, and the first sub-segments 152 and the second sub-segments 153 are alternately arranged along the circumference of the outer ring 11. After the first sub-segment 152 fails due to creep, the second sub-segment 153 can play a supporting role, thereby helping to improve the service life of the first elastic insulator 15. There are two solutions to achieve this purpose, and the two solutions are introduced below.

[0092] In the first solution, the elastic modulus of the first sub-segment 152 and the second sub-segment 153 are equal, that is, the first sub-segment 152 and the second sub-segment 153 can be made of the same material. The upper surface of the first sub-segment 152 protrudes from the upper surface of the second sub-segment 153 (the outer diameter of the first sub-segment 152 is larger than the outer diameter of the second sub-segment 153), so that after the first sub-segment 152 fails due to creep, the second sub-segment 153 can play a supporting role.

[0093] In the second solution, the upper surface of the first subsegment 152 is flush with the upper surface of the second subsegment 153, but the elastic modulus of the first subsegment 152 is greater than the elastic modulus of the second subsegment 153, so that after the first subsegment 152 fails due to creep, the second subsegment 153 can play a supporting role.

[0094] Optionally, the number of the first sub-segments 152 and the second sub-segments 153 are the same, so that the first sub-segments 152 and the second sub-segments 153 are evenly distributed along the circumference of the outer ring 11, thereby facilitating improving the stability of the insulating bearing.

[0095] It should be noted that, in this embodiment, the first elastic insulator 15 is an integrally formed structure. In order to facilitate the reader to understand only the first sub-segment 152 and the second sub-segment 153, Fig.10 and Fig.11 In the figure, the first sub-segment 152 and the second sub-segment 153 are divided by a dotted line, but there is no dotted line in the actual product.

[0096] It should be understood that the above-mentioned embodiments and some aspects or features thereof may be appropriately combined.

[0097] This application has at least one of the following advantages:

[0098] (i) The first elastic insulator protrudes from the surface of the insulating layer, thereby preventing the insulating layer from contacting the groove wall of the mounting groove in the housing end cover, and preventing the insulating layer from being damaged during the operation of the motor.

[0099] (ii) After the insulating bearing is installed in the mounting groove, the first elastic insulator will be in interference contact with the groove wall, so that the insulating bearing is fixed in the mounting groove, which can prevent the insulating bearing from moving, especially prevent the outer ring from sliding relative to the mounting groove, thereby ensuring the stability of the motor operation.

[0100] (iii) By providing a second elastic insulator extending in a direction parallel to the axial direction of the insulating bearing, the contact area between the insulating bearing and the slot wall can be increased, the fixing strength between the insulating bearing and the mounting slot can be improved, the probability of movement of the insulating bearing can be further reduced, and the risk of damage to the insulating layer can be further reduced.

[0101] Of course, the present application is not limited to the above-mentioned embodiments. Under the guidance of the present application, those skilled in the art may make various modifications to the above-mentioned embodiments of the present application without departing from the scope of the present application.

Claims

1. An insulating bearing, include: An outer ring (11), an inner ring (12), and a rolling element (13) located between the outer ring (11) and the inner ring (12), wherein an insulating layer (14) is formed on the outer surface of the outer ring (11), characterized in that: At least two annular grooves (111) are formed on the outer circumferential surface of the outer ring (11), a first elastic insulator (15) is arranged in the annular groove (111), and the first elastic insulator (15) protrudes from the surface of the insulating layer (14); the outer diameter (R2) of the outer ring (11) is smaller than the inner diameter (R1) of a mounting groove (101) in a housing end cover (100) for mounting an insulating bearing, the first elastic insulator (15) is annular, and the outer diameter (R3) of the first elastic insulator (15) is larger than the inner diameter (R1) of the mounting groove (101), and after the insulating bearing is mounted in the mounting groove (101), a gap is formed between the insulating layer (14) and the groove wall of the mounting groove (101); At least two axial grooves (112) are evenly distributed on the outer peripheral surface of the outer ring (11); the axial groove (112) is located between the two annular grooves (111) and is in communication with the annular groove (111); a second elastic insulator (16) is arranged in the axial groove (112); the second elastic insulator (16) protrudes from the surface of the insulating layer (14); the first elastic insulator (15) and the second elastic insulator (16) are an integrally formed structure; The first elastic insulator (15) comprises at least two first sub-segments (152) and at least two second sub-segments (153), wherein the first sub-segments (152) and the second sub-segments (153) are alternately arranged along the circumference of the outer ring (11). The elastic modulus of the first sub-segment (152) and the second sub-segment (153) are equal, and the upper surface of the first sub-segment (152) protrudes from the upper surface of the second sub-segment (153); or, the upper surface of the first sub-segment (152) is flush with the upper surface of the second sub-segment (153), and the elastic modulus of the first sub-segment (152) is greater than the elastic modulus of the second sub-segment (153).

2. The insulating bearing according to claim 1, It is characterized in that The upper surface of the second elastic insulator (16) does not protrude from the upper surface of the first elastic insulator (15).

3. The insulating bearing according to claim 1, It is characterized in that A recess (113) is formed on the bottom or the wall of the annular groove (111); the first elastic insulator (15) comprises a first protrusion (151); the first protrusion (151) is located in the recess (113) and is matched with the recess (113); and / or, A recess (113) is formed on the groove bottom or the groove wall of the axial groove (112), and the second elastic insulator (16) includes a second protrusion located in the recess (113).

4. The insulating bearing according to claim 1, It is characterized in that The first elastic insulator (15) and the second elastic insulator (16) include at least one of fluorine-containing olefin fluororubber, perfluoroether rubber, fluorinated phosphazene rubber, perfluoroalkyl triazine rubber, fluorosilicone rubber, hydrogenated nitrile rubber and modified silicone rubber.

5. A method for manufacturing an insulating bearing as claimed in any one of claims 1 to 4, It is characterized in that include: forming an insulating layer (14) on the outer surface of the outer ring (11); At least one annular groove (111) is formed on the outer peripheral surface of the outer ring (11); A first elastic insulator (15) is formed so as to be partially located in the annular groove (111), so that the first elastic insulator (15) protrudes from the surface of the insulating layer (14).

6. The method for manufacturing an insulating bearing according to claim 5, It is characterized in that A first elastic insulator (15) is formed so as to be partially located in the annular groove (111), comprising: The first elastic insulator (15) is manufactured to be annular, and the first elastic insulator (15) is sleeved into the annular groove (111); or, The elastic insulating material is directly applied into the annular groove (111) by an extrusion molding process to form the first elastic insulator (15).

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