Bearing and motor

Abstract

A bearing (100), comprising: an inner ring (110) comprising a shaft hole (1104), the shaft hole (1104) being used for mounting a rotating shaft (210); an outer ring (120) located on the peripheral side of the inner ring (110), the outer ring (120) being in rolling connection with the inner ring (110); and a sealing component (130) arranged on the inner ring (110) or the outer ring (120), wherein the sealing component (130) is configured to be sleeved on the rotating shaft (210), and the sealing component (130) is used for sealing the peripheral side surface of the rotating shaft (210). Also provided is a motor (200).

Description

Bearings and motors

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 26, 2023 with application number "202311808770.4", and the priority to the Chinese patent application filed with the China Patent Office on December 26, 2023 with application number "202323565367.1", all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of bearings, and in particular to a bearing and a motor. Background Art

[0003] In related technologies, in many scenarios where bearings are required, a separate oil seal needs to be provided in conjunction with the bearing to meet the dynamic sealing requirements of the internal rotating shaft.

[0004] The oil seal needs to be assembled with the help of a positioning and mounting structure on the outside of the bearing, which results in a complicated assembly process and poor assembly reliability.

[0005] Therefore, how to overcome the above-mentioned technical defects has become a technical problem that needs to be solved urgently. Technical Solutions

[0006] This application aims to solve at least one of the technical problems existing in the prior art.

[0007] To this end, a first aspect of the present application provides a bearing.

[0008] A second aspect of the present application provides an electric motor.

[0009] In view of this, the first aspect of the present application provides a bearing, which includes: an inner ring, including an axial hole, in which a rotating shaft is installed; an outer ring, located on the circumferential side of the inner ring, and the outer ring is rollingly connected to the inner ring; a sealing component, provided on the inner ring or the outer ring, the sealing component is configured to be mounted on the rotating shaft, and the sealing component is used to seal the circumferential side surface of the rotating shaft.

[0010] By integrating the sealing component into the inner or outer ring, this application achieves a modular design of the sealing component on the bearing, eliminating the need to select and install the oil seal structure separately on the outside of the rotating shaft. This simplifies the bearing assembly process and assembly difficulty, while also preventing the mis-installation or omission of the oil seal. This resolves the technical shortcomings of the related art and achieves the technical effect of optimizing the bearing structure and improving its practicality and reliability.

[0011] In addition, the bearings provided in this application may also have the following additional technical features:

[0012] In some technical solutions of the present application, optionally, the sealing component is connected to the outer ring; the sealing component is spaced apart from the inner ring.

[0013] In some technical solutions of the present application, optionally, the outer ring includes a first end face, the inner ring includes a second end face, and the first end face and the second end face are staggered in the axial direction of the bearing; the sealing component is at least partially located between the first end face and the second end face.

[0014] In some technical solutions of the present application, optionally, the inner annular surface of the outer ring includes a groove; and the sealing component is clamped in the groove.

[0015] In some technical solutions of the present application, optionally, in the axial direction of the bearing, the distance between the sealing component and the inner ring is a first interval, and the inner diameter of the inner ring is R; the range of the first interval L is: greater than or equal to 0.01R, and less than or equal to 0.5R.

[0016] In some technical solutions of the present application, optionally, the sealing component includes: a supporting part connected to the inner ring or the outer ring, the supporting part being a rigid structure; a sealing part provided on the supporting part, the sealing part being configured to be sleeved on the circumferential side surface of the rotating shaft, and the sealing part being a flexible structure.

[0017] In some technical solutions of the present application, optionally, the inner diameter of the support portion is greater than or equal to the inner diameter of the shaft hole; and the inner diameter of the sealing portion is smaller than the inner diameter of the shaft hole.

[0018] In some technical solutions of the present application, optionally, in the axial direction of the bearing, the sealing portion is located between the support portion and the inner ring.

[0019] In some technical solutions of the present application, optionally, in the radial direction of the bearing, the support portion is located between the outer ring and the sealing portion.

[0020] A second aspect of the present application provides a motor, comprising: a bearing as in any of the above technical solutions; a rotating shaft passing through the inner ring, and a sealing component abutting against the circumferential side surface of the rotating shaft.

[0021] In this technical solution, a motor is proposed that is provided with a bearing in any of the above-mentioned technical solutions. Therefore, the motor has the advantages of the bearing in any of the above-mentioned technical solutions, and the motor can achieve the technical effects that can be achieved by the bearing in any of the above-mentioned technical solutions. To avoid repetition, it will not be repeated here.

[0022] Additional aspects and advantages of the present application will become apparent in the following description or may be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] FIG1 shows a schematic structural diagram of a motor according to an embodiment of the present application;

[0025] FIG2 is a cross-sectional view of the motor in the embodiment shown in FIG1 taken along the AA direction;

[0026] FIG3 shows a schematic structural diagram of a bearing according to an embodiment of the present application;

[0027] FIG4 shows a schematic structural diagram of a bearing according to an embodiment of the present application;

[0028] FIG5 shows a schematic structural diagram of a bearing according to an embodiment of the present application;

[0029] FIG6 shows a schematic structural diagram of a bearing according to an embodiment of the present application;

[0030] FIG7 shows a schematic structural diagram of a motor according to an embodiment of the present application;

[0031] FIG8 is a cross-sectional view of the motor in the embodiment shown in FIG7 along the BB direction.

[0032] The corresponding relationship between the reference numerals and component names in Figures 1 to 8 is as follows:

[0033] 100 bearing, 110 inner ring, 1102 second end face, 1104 shaft hole, 120 outer ring, 1202 first end face, 1204 groove, 130 sealing component, 132 support part, 134 sealing part, 200 motor, 210 rotating shaft. Modes for Carrying Out the Invention

[0034] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0036] Bearings and motors according to some embodiments of the present application are described below with reference to FIG. 1 to FIG. 8 .

[0037] As shown in Figures 1, 2, 3, 7 and 8, an embodiment of the present application provides a bearing 100, which includes: an inner ring 110, including an axial hole 1104, in which a rotating shaft 210 is installed; an outer ring 120, located on the peripheral side of the inner ring 110, and the outer ring 120 is rollingly connected to the inner ring 110; a sealing component 130, provided on the inner ring 110 or the outer ring 120, and the sealing component 130 is configured to be fitted on the rotating shaft 210, and the sealing component 130 is used to seal the peripheral side surface of the rotating shaft 210.

[0038] FIG1 shows a schematic structural diagram of a motor 200 according to an embodiment of the present application.

[0039] FIG2 is a cross-sectional view of the motor 200 in the embodiment shown in FIG1 along the AA direction.

[0040] FIG3 shows a schematic structural diagram of a bearing 100 according to an embodiment of the present application. In FIG3 , arrow a shows the axial direction of the bearing 100 , and arrow b shows the radial direction of the bearing 100 .

[0041] FIG7 shows a schematic structural diagram of a motor according to an embodiment of the present application.

[0042] FIG8 is a cross-sectional view of the motor in the embodiment shown in FIG7 along the BB direction.

[0043] In this embodiment, the bearing 100 includes an inner ring 110, an outer ring 120, and rolling elements. A shaft hole 1104 is formed inside the inner ring 110, into which a rotating shaft 210 is inserted. The inner ring 110 provides positioning and support for the rotating shaft 210. Specifically, the rotating shaft 210 and the shaft hole 1104 are fitted with a clearance fit, an interference fit, or a transition fit. The outer ring 120 is positioned around the inner ring 110, with a gap between the outer ring 120 and the inner ring 110. The gap is used to accommodate the rolling elements, ensuring a rolling connection between the inner ring 110 and the outer ring 120. During operation, the rotating shaft 210 drives the inner ring 110 to rotate relative to the outer ring 120. During this relative rotation, the rolling elements reduce the resistance between the inner ring 110 and the outer ring 120 by rolling, thereby reducing the rotational resistance of the rotating shaft 210.

[0044] Furthermore, bearing 100 also includes a sealing component 130, which is integrated with outer ring 120 or inner ring 110. That is, after bearing 100 is assembled, sealing component 130 is integral with inner ring 110 or outer ring 120, and the inner diameter of sealing component 130 matches the diameter of shaft hole 1104. During the insertion of shaft 210 into inner ring 110, sealing component 130 is simultaneously fitted onto the outside of shaft 210, and sealing component 130 and the circumferential surface of shaft 210 are in contact, thus ensuring dynamic sealing of shaft 210.

[0045] Thus, by integrating the sealing component 130 into the inner ring 110 or the outer ring 120, the present application achieves a modular design of the sealing component 130 on the bearing 100, eliminating the need to select and install the oil seal structure separately on the outside of the rotating shaft 210. This simplifies the assembly process and difficulty of the bearing 100 while also preventing the possibility of incorrect or missing oil seals. This resolves the technical shortcomings of the related art and further achieves the technical effect of optimizing the structure of the bearing 100 and improving its practicality and reliability.

[0046] At the same time, compared with the dynamic sealing solution of independently setting an oil seal outside the bearing 100, the integrated design of the sealing component 130 can improve the compactness of the associated structure, thereby reducing the occupied space and providing convenient conditions for the miniaturization design of associated products.

[0047] Specifically, in Figures 1 and 2 , sealing component 130 is integrated with outer ring 120, and in Figures 7 and 8 , sealing component 130 is integrated with inner ring 110. As shown in Figures 3 and 4 , in some embodiments of the present application, sealing component 130 may optionally be connected to outer ring 120 and spaced apart from inner ring 110.

[0048] FIG4 shows a schematic structural diagram of a bearing 100 according to an embodiment of the present application, where arrow a in FIG4 shows the axial direction.

[0049] In this embodiment, the sealing component 130 is integrated on the outer ring 120 , and the sealing component 130 extends inward from the outer ring 120 to the peripheral side surface of the rotating shaft 210 . At the same time, the sealing component 130 is spaced apart from the inner ring 110 .

[0050] Compared with the inner ring 110 , the outer ring 120 is relatively larger. Providing the sealing component 130 on the outer ring 120 can reduce the difficulty of integrating the sealing component 130 , which is beneficial to reducing the production cost of the bearing 100 and improving the yield rate of the bearing 100 .

[0051] By leaving a gap between the sealing component 130 and the inner ring 110, the sealing component 130 can be prevented from contacting the rotating inner ring 110, and the sealing component 130 and the inner ring 110 can be prevented from interfering with each other. On the one hand, the reliability of the dynamic seal of the sealing component 130 is improved, and on the other hand, the rotational resistance of the bearing 100 is reduced.

[0052] As shown in Figures 3 and 4, in some embodiments of the present application, optionally, the outer ring 120 includes a first end face 1202, the inner ring 110 includes a second end face 1102, and in the axial direction of the bearing 100, the first end face 1202 and the second end face 1102 are staggered; the sealing component 130 is at least partially located between the first end face 1202 and the second end face 1102.

[0053] In this embodiment, the outer ring 120 includes a first end face 1202, and the inner ring 110 includes a second end face 1102. The first and second end faces 1202, 1102 face the same direction and are offset in the axial direction of the bearing 100 to form a gap between the first and second end faces 1202, 1102. Specifically, an outer ring 120 with a longer axial length and an inner ring 110 with a shorter axial length can be provided. During assembly, the inner ring 110 and outer ring 120 are aligned on one side, and the length difference creates the aforementioned gap on the other side.

[0054] On this basis, the sealing component 130 connected to the outer ring 120 is at least partially located in the notch. By integrating the sealing component 130 at least partially within the notch, the space occupied by the sealing component 130 outside the bearing 100 can be reduced, facilitating the miniaturization of related products. Furthermore, the outer ring 120 can position and protect the sealing component 130 in the notch, reducing the possibility of dislocation, loss, and damage to the sealing component 130, thereby improving the reliability and service life of the bearing 100.

[0055] As shown in FIG. 4 , in some embodiments of the present application, optionally, the inner annular surface of the outer ring 120 includes a groove 1204 ; the sealing component 130 is snap-engaged in the groove 1204 .

[0056] In this embodiment, a groove 1204 is provided on the inner annular surface of the outer ring 120 . The groove 1204 surrounds the circumference of the rotating shaft 210 , and the inner ring 110 avoids the area between the groove 1204 and the rotating shaft 210 .

[0057] The shape of the groove 1204 is adapted to the outer contour of the sealing component 130 , and during the assembly process, the sealing component 130 is pushed into the groove 1204 to complete the clamping of the sealing component 130 on the outer ring 120 .

[0058] Thus, the provision of groove 1204 allows sealing component 130 to be positioned at a predetermined installation position, reducing the possibility of misalignment or even falling off of sealing component 130. Furthermore, the provision of groove 1204 allows the outer contour of sealing component 130 to be rationally utilized, thereby simplifying the positioning and installation structure of sealing component 130 and reducing the assembly complexity of sealing component 130.

[0059] As shown in Figures 1 and 4, in some embodiments of the present application, optionally, in the axial direction of the bearing 100, the distance between the sealing component 130 and the inner ring 110 is a first interval L, and the inner diameter of the inner ring 110 is R; the range of the first interval is: greater than or equal to 0.01R, and less than or equal to 0.5R.

[0060] In this embodiment, in the axial direction of the bearing 100 , the distance between the sealing component 130 and the second end surface 1102 is a first interval L, which is associated with the diameter R of the inner ring 110 .

[0061] Specifically, the first interval must be greater than or equal to 0.01×R and less than or equal to 0.5×R. By limiting the first interval to greater than or equal to 0.01R, sufficient deformation margin is left for sealing component 130, preventing interference between the deformed sealing component 130 and the end face of inner ring 110, thereby improving the reliability and sealing effectiveness of bearing 100. By limiting the first interval to less than or equal to 0.5R, the structural compactness of bearing 100 can be improved while meeting dynamic sealing requirements, facilitating the miniaturization and lightweight design of bearing 100.

[0062] As shown in Figure 4, in some embodiments of the present application, optionally, the sealing component 130 includes: a support portion 132, which is connected to the inner ring 110 or the outer ring 120, and the support portion 132 is a rigid structure; a sealing portion 134, which is provided on the support portion 132, and the sealing portion 134 is configured to be mounted on the circumferential side of the rotating shaft 210, and the sealing portion 134 is a flexible structure.

[0063] In this embodiment, sealing component 130 includes a support portion 132 and a sealing portion 134. Support portion 132 is connected to inner ring 110 or outer ring 120, while sealing portion 134 is connected to support portion 132 and disposed outside support portion 132. Support portion 132 is used to position and support sealing portion 134, maintaining it in a predetermined position to ensure the reliability of the dynamic seal. Support portion 132 is spaced apart from rotating shaft 210, while sealing portion 134 is interposed between them, meaning that sealing portion 134 is in direct contact with the circumferential side of rotating shaft 210.

[0064] On this basis, the support portion 132 is a rigid structure, and specifically the support portion 132 can be processed from a cold-rolled steel plate. Selecting a rigid material to prepare the support portion 132 can improve the structural strength of the sealing component 130 and reduce the possibility of the sealing component 130 bending or even breaking.

[0065] Correspondingly, the sealing portion 134 is a flexible structure. Specifically, rubber can be coated on the support portion 132 to form a rubber sealing portion 134. Selecting a flexible material to prepare the support portion 132 can, on the one hand, reduce the resistance of the sealing component 130 to the rotating shaft 210 by utilizing the deformation characteristics of the flexible structure, and on the other hand, reduce the damage of the support portion 132 to the rotating shaft 210.

[0066] As shown in Figures 4, 5 and 6, in some embodiments of the present application, optionally, the inner diameter of the support portion 132 is greater than or equal to the inner diameter of the shaft hole 1104; the inner diameter of the sealing portion 134 is smaller than the inner diameter of the shaft hole 1104.

[0067] FIG5 shows a schematic structural diagram of a bearing 100 according to an embodiment of the present application.

[0068] FIG6 shows a schematic structural diagram of a bearing 100 according to an embodiment of the present application.

[0069] In this embodiment, the support portion 132 is annular, and the outer diameter of the support portion 132 is adapted to the size of the groove 1204 on the inner side of the outer ring 120. The inner diameter of the support portion 132 is greater than or equal to the inner diameter of the shaft hole 1104 to prevent the support portion 132 from affecting the rotation of the rotating shaft 210.

[0070] On this basis, when shaft 210 is not installed, the inner diameter of sealing portion 134 is smaller than the inner diameter of shaft hole 1104, ensuring that sealing portion 134 closely contacts the circumferential surface of shaft 210, achieving an effective and reliable dynamic seal. During the insertion of shaft 210 into bearing 100, the flexible sealing portion 134 deforms to change its inner diameter to accommodate shaft 210 in shaft hole 1104.

[0071] As shown in FIG. 6 , in some embodiments of the present application, optionally, in the axial direction of the bearing 100 , the sealing portion 134 is located between the support portion 132 and the inner ring 110 .

[0072] In this embodiment, in the axial direction of the bearing 100 , the sealing portion 134 is located between the supporting portion 132 and the second end surface 1102 , that is, the sealing portion 134 in the notch is shielded by the supporting portion 132 .

[0073] During the installation of the rotating shaft 210 , the support portion 132 located on the outside can limit the deformation of the sealing portion 134 to prevent the sealing portion 134 from being dislocated or even falling out, thereby improving the positioning and supporting effect of the support portion 132 on the sealing portion 134 .

[0074] After assembly is completed, the support portion 132 can play a protective role on the outside of the sealing portion 134 to prevent the sealing portion 134 from being damaged due to collision. At the same time, the support portion 132 can block dust from entering the gap to ensure the effectiveness of dynamic sealing.

[0075] As shown in FIG. 5 , in some embodiments of the present application, optionally, in the radial direction of the bearing 100 , the support portion 132 is located between the outer ring 120 and the sealing portion 134 .

[0076] In this embodiment, the support portion 132 and the sealing portion 134 are both annular and nested. After assembly, the sealing portion 134 is interposed between the support portion 132 and the rotating shaft 210, i.e., the support portion 132 is connected to the outer ring 120, and the sealing portion 134 is in contact with the rotating shaft 210.

[0077] Providing support portion 132 that contacts outer ring 120 improves the positioning stability of sealing component 130 and prevents deformation of the flexible structure from affecting the positioning effect. Providing sealing portion 134 between support portion 132 and rotating shaft 210 prevents support portion 132 from contacting rotating shaft 210, preventing the rigid support portion 132 from scratching rotating shaft 210.

[0078] As shown in Figures 1 and 2, an embodiment of the present application provides a motor 200, which includes: a bearing 100 as in any of the above embodiments; a rotating shaft 210 passing through the inner ring 110, and a sealing component 130 abutting against the circumferential side surface of the rotating shaft 210.

[0079] In this embodiment, bearing 100 includes an inner ring 110, an outer ring 120, and rolling elements. A shaft hole 1104 is formed inside inner ring 110, through which a rotating shaft 210 is inserted. Inner ring 110 provides positioning and support for rotating shaft 210. Specifically, rotating shaft 210 and shaft hole 1104 are fitted with a clearance fit, an interference fit, or a transition fit. Outer ring 120 is positioned around inner ring 110, with a gap between them for mounting rolling elements, ensuring a rolling connection between inner ring 110 and outer ring 120. During operation, rotating shaft 210 drives inner ring 110 to rotate relative to outer ring 120. During relative rotation, the rolling elements reduce the resistance between inner ring 110 and outer ring 120 by rolling, thereby reducing the rotational resistance of rotating shaft 210.

[0080] Furthermore, bearing 100 also includes a sealing component 130, which is integrated with outer ring 120 or inner ring 110. That is, after bearing 100 is assembled, sealing component 130 is integral with inner ring 110 or outer ring 120, and the inner diameter of sealing component 130 matches the diameter of shaft hole 1104. During the insertion of shaft 210 into inner ring 110, sealing component 130 is simultaneously fitted onto the outside of shaft 210, and sealing component 130 and the circumferential surface of shaft 210 are in contact, thus ensuring dynamic sealing of shaft 210.

[0081] Thus, by integrating the sealing component 130 into the inner ring 110 or the outer ring 120, the present application achieves a modular design of the sealing component 130 on the bearing 100, eliminating the need to select and install the oil seal structure separately on the outside of the rotating shaft 210. This simplifies the assembly process and difficulty of the bearing 100 while also preventing the possibility of incorrect or missing oil seals. This resolves the technical shortcomings of the related art and further achieves the technical effect of optimizing the structure of the bearing 100 and improving its practicality and reliability.

[0082] At the same time, compared with the dynamic sealing solution of independently setting an oil seal outside the bearing 100, the integrated design of the sealing component 130 can improve the compactness of the associated structure, thereby reducing the occupied space, and providing convenient conditions for the miniaturization design of the motor 200.

[0083] On this basis, the motor 200 also includes a rotating shaft 210, which is inserted into the shaft hole 1104, and the sealing component 130 is sleeved on the peripheral side surface of the rotating shaft 210, and the sealing component 130 maintains contact with the peripheral side surface of the rotating shaft 210, so as to meet the dynamic sealing requirements of the rotating shaft 210 through the sealing component 130.

[0084] It should be clarified that in the claims, specification and drawings of this application, the term "plurality" refers to two or more. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the purpose of more conveniently describing this application and making the description process simpler, and is not intended to indicate or imply that the device or element referred to must have the specific orientation described, be constructed and operated in a specific orientation. Therefore, these descriptions cannot be understood as limitations on this application. The terms "connect", "install", "fix" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection between multiple objects, or a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects, or an indirect connection between multiple objects through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood based on the specific circumstances of the above data.

[0085] In the claims, specification, and drawings of this application, the terms "one embodiment," "some embodiments," "a specific embodiment," and the like mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of this application. In the claims, specification, and drawings of this application, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0086] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A bearing, wherein, Comprising: An inner ring, including a shaft hole for installing a rotating shaft therein; An outer ring, located on the circumferential side of the inner ring, and the outer ring is in rolling connection with the inner ring; A sealing member, provided on the inner ring or the outer ring, the sealing member is configured to be sleeved on the rotating shaft, and the sealing member is used for sealing the circumferential side of the rotating shaft.

2. The bearing according to claim 1, wherein The sealing member is connected to the outer ring; The sealing member is spaced apart from the inner ring.

3. The bearing according to claim 2, wherein The outer ring includes a first end face, and the inner ring includes a second end face. In the axial direction of the bearing, the first end face and the second end face are arranged in a staggered manner; At least a part of the sealing member is located between the first end face and the second end face.

4. The bearing according to claim 3, wherein The inner circumferential surface of the outer ring includes a groove; The sealing member is snap-fitted into the groove.

5. The bearing according to any one of claims 2 to 4, wherein In the axial direction of the bearing, the distance between the sealing member and the inner ring is a first interval, and the inner diameter of the inner ring is R; The range of the first interval is: greater than or equal to 0.01R and less than or equal to 0.5R.

6. The bearing according to any one of claims 1 to 5, wherein, The sealing member includes: A support portion, connected to the inner ring or the outer ring, and the support portion is a rigid structure; A sealing portion, provided on the support portion, the sealing portion is configured to be sleeved on the circumferential side of the rotating shaft, and the sealing portion is a flexible structure.

7. The bearing according to claim 6, wherein The inner diameter of the support portion is greater than or equal to the diameter of the shaft hole; The inner diameter of the sealing portion is less than the diameter of the shaft hole.

8. The bearing according to claim 6 or 7, wherein In the axial direction of the bearing, the sealing portion is located between the support portion and the inner ring.

9. The bearing according to any one of claims 6 to 8, wherein In the radial direction of the bearing, the support portion is located between the outer ring and the sealing portion.

10. An electric machine, wherein, Comprising: A bearing according to any one of claims 1 to 9; A rotating shaft, passing through the inner ring, and the sealing member abuts against the circumferential side of the rotating shaft.

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