Retainer, axial limiting structure and motor

Abstract

The utility model relates to a kind of retaining ring, axial limiting structure and motor.The retaining ring is used to be received in circumferential groove on the first component to limit the axial position of second component relative to first component, and including the first surface and second surface respectively facing and away from second component in axial direction.The first surface includes chamfer surface in its radial top, which is inclined in a manner that the farther to radial top side, the closer to second surface in axial direction, and the retaining ring can make chamfer surface abut with second component having different axial dimensions by elastically shrinking or expanding in radial direction in the state that second surface abuts against circumferential groove in axial direction when being received in circumferential groove.The retaining ring according to the utility model can not be limited by rotational speed in application, and can be adapted to second component having different axial dimensions, reducing tolerance fit requirement, and thereby reducing machining requirement.

Description

Technical Field

[0001] This utility model relates to the field of mechanical parts technology, and in particular to a retaining ring for axial positioning and an axial positioning structure using the retaining ring. Background Technology

[0002] In the mechanical field, it is often necessary to restrict or fix the position of one component relative to another component along the latter's length (or axial direction). For example, in the field of electric motors, bearings are key components that support the motor shaft and ensure the smooth rotation of the rotor relative to the stator. Bearings are generally installed in the bearing cavity of the motor end cover or frame, and the accuracy and reliability of the bearing's installation position on the motor shaft directly affect the motor's operational stability, noise level, and lifespan. Therefore, reliable fixing measures are needed to install the bearing on the motor shaft to prevent axial displacement or movement of the bearing. In existing technology, retaining rings are widely used for this axial limiting of bearings.

[0003] Specifically, the motor shaft has circumferential grooves and shoulders spaced apart axially. The bearing is fitted onto the motor shaft from the end with the circumferential groove, with one axial end face abutting against the shoulder. A retaining ring (e.g., an open C-ring) is opened by a guide tool, allowing it to engage with the circumferential groove and abut against the other axial end face of the bearing. This retaining ring axially limits and fixes the bearing on the motor shaft. However, when applied to high-speed motors, the high centrifugal force generated by the high-speed rotation of the motor shaft can easily cause the retaining ring's opening to increase, leading to it dislodging from the circumferential groove and failure. Furthermore, the distance between the circumferential groove and the shoulder needs to be precisely set to equal the axial thickness of the bearing. This ensures the retaining ring can both smoothly engage with the circumferential groove and tightly abut against the axial end face of the bearing to limit axial displacement. This requires a high dimensional tolerance between the circumferential groove and the bearing, thus placing high demands on machining. Utility Model Content

[0004] The purpose of this invention is to solve at least one of the above-mentioned problems and / or other defects in the prior art.

[0005] To achieve the above objectives, one aspect of the present invention provides a retaining ring for receiving in a circumferential groove on a first component to limit the axial position of a second component relative to the first component. The retaining ring includes a first surface and a second surface that are axially facing and facing away from the second component, respectively. The first surface includes a chamfered surface at its radial apex, which is inclined closer axially to the second surface towards the radial apex. When received in the circumferential groove, the retaining ring is capable of elastically contracting or expanding radially while the second surface is axially abutting against the circumferential groove, thereby allowing the chamfered surface to abut against the second component, which has a different axial dimension.

[0006] According to one embodiment of the present invention, the second surface includes a guide surface at its radial top that is inclined in a manner that gets closer to the first surface axially toward the radial top side.

[0007] According to one embodiment of the present invention, the guide surface includes a smooth portion located at the radial top edge of the retaining ring.

[0008] According to one embodiment of the present invention, the second surface includes a limiting surface at its radial bottom that abuts against the sidewall of the circumferential groove perpendicular to the axial direction.

[0009] According to one embodiment of the present invention, the first surface further includes a stepped surface extending radially upward from the radial top edge of the chamfered surface in a direction perpendicular to the axial direction.

[0010] According to one embodiment of the present invention, the retaining ring is in the form of a C-shaped retaining ring.

[0011] According to one embodiment of the present invention, the first component is a shaft-shaped component, and a shoulder and a circumferential groove are provided on the outer peripheral surface of the shaft-shaped component. The second component is fitted onto the shaft-shaped component between the shoulder and the retaining ring received in the circumferential groove. The chamfered surface is located radially outside the first surface.

[0012] Another aspect of the present invention provides an axial limiting structure comprising a first component, a second component, and a retaining ring as described in any of the preceding claims, the retaining ring being received in a circumferential groove on the first component to limit the axial position of the second component relative to the first component.

[0013] According to one embodiment of the present invention, the first component is a rotating shaft, and the second component is a bearing mounted on the rotating shaft.

[0014] Another aspect of this utility model provides an electric motor, which includes the axial limiting structure described above.

[0015] The retaining ring according to this invention has a first surface facing a second component (such as a bearing) in the axial direction for abutting and limiting the second component, and a second surface facing away from the first surface. The first surface has a chamfered surface at its radial top, which is inclined such that it gets closer to the second surface in the axial direction towards the radial top. When the retaining ring is received in a circumferential groove on the first component (such as a motor shaft), it can elastically contract or expand in the radial direction while the second surface is abutting the circumferential groove in the axial direction, so that the chamfered surface abuts against the second component with a different axial dimension. Since the chamfered surface is inclined relative to the axial direction as described above, the force applied to the second component when it abuts against the second component can be decomposed into an axial force and a radial force. On the one hand, the axial force can abut the second component against, for example, the shoulder of the first component, thereby limiting the axial position of the second component relative to the first component. On the other hand, the radial force applied to the second component by the chamfered surface causes the second component to exert a radial reaction force on the chamfered surface. This radial reaction force can prevent the retaining ring from dislodging from the circumferential groove due to high centrifugal force when rotating at high speed with the first component, thus allowing the application of the retaining ring to be unrestricted by rotational speed. In addition, the same retaining ring received in the same circumferential groove can use the chamfered surface to elastically contract or expand in the radial direction to axially limit the second components with different axial dimensions. This can reduce the tolerance requirements between the axial dimension of the second component and the axial position of the circumferential groove, thereby reducing the requirements for machining. Moreover, the force applied to the retaining ring by the second component through the inclined chamfered surface also helps to center the retaining ring axially when installed in the circumferential groove, avoiding the retaining ring from becoming eccentric due to its own weight and the resulting poor or failed limiting effect. The retaining ring according to this invention is simple to install and disassemble, and can be repeatedly disassembled and assembled. Attached Figure Description

[0016] The features and advantages of this utility model will become clear from the following detailed description provided with reference to the accompanying drawings. It should be noted that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limitations on this utility model, wherein:

[0017] Figure 1 A schematic diagram of an axial limiting structure according to an embodiment of the present invention is shown. The axial limiting structure is a shaft-type structure.

[0018] Figure 2 Show Figure 1 A magnified view of point A in the axial limiting structure shown.

[0019] Figure 3 Show Figure 2 A magnified view of point B in the image.

[0020] Figure 4 Show Figure 1The diagram shows the installation process of the axial limiting structure.

[0021] Figure 5 A schematic diagram of an axial limiting structure according to another embodiment of the present invention is shown, wherein the axial limiting structure is a hole-type structure.

[0022] Figure 6 Show Figure 5 A magnified view of point C in the axial limiting structure shown.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10. Retaining ring; 20. First component; 21. Circumferential groove; 22. Shoulder; 30. Second component; 1. First surface; 2. Second surface; 3. Radial surface; 4. Chamfered surface; 5. Limiting surface; 6. Guide surface; 61. Smooth part; 7. Step surface. Detailed Implementation

[0025] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to enable those skilled in the art to more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that implementations of the present invention may not include some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. Rather, the present invention can be conceived to be implemented with any combination of the features and elements described below, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be construed as elements or limitations of the claims unless expressly set forth in the claims.

[0026] Where terms such as “first” or “second” are used below to describe elements of this application, these terms are used only to distinguish individual elements and not to limit the nature, order, or number of these elements. The terms “comprising” and “having” are used to indicate an open-ended inclusion, meaning that additional elements / components may exist in addition to those listed.

[0027] Figures 1 to 3 An axial limiting structure according to an embodiment of the present invention is shown. The axial limiting structure may include a retaining ring 10, a first component 20, and a second component 30. The retaining ring 10 is received in a circumferential groove 21 on the first component 20 so as to abut against the second component 30 and limit the axial position of the second component 30 relative to the first component 20. The axial limiting structure according to this embodiment is a shaft-type structure, wherein the first component 20 is configured as a shaft-like component, such as a rotating shaft, and the second component 30 is fitted onto the first component 20 and is, for example, a bearing for supporting the rotating shaft. Figure 1 and2 As shown, with the second component 30 mounted on the first component 20, the length direction of the first component 20 ( Figure 1 and 2 The left and right directions in the middle are called the "axial direction" of each component.

[0028] The circumferential groove 21 is recessed radially inward from the outer peripheral surface of the first component 20, and has, for example, two sidewalls that are opposite each other and extend radially, and a bottom wall that extends axially from one sidewall to the other sidewall, such that the radially truncated cross-section of the circumferential groove 21 is approximately rectangular. In addition to the circumferential groove 21, the first component 20 is also provided with shoulders 22 arranged axially spaced from the circumferential groove 21. The shoulders 22 protrude radially outward from the outer peripheral surface of the first component 20, thereby forming a contact surface against which the second component 30 can abut.

[0029] The second component 30 includes an axially extending through hole for fitting onto the first component 20, and has two axial end faces facing away from each other, the distance between which is the axial dimension (thickness) of the second component 30. After the second component 30 is fitted onto the first component 20 from the end of the first component 20 with the circumferential groove 21, one axial end face of the second component 30 ( Figure 2 The right axial end face of the first component 20 can abut against the shoulder of the first component 20.

[0030] refer to Figure 2 and 3 As shown, the retaining ring 10 according to this embodiment may include a first surface 1 and a second surface 2 that are axially opposed to each other. When the retaining ring 10 is received in the circumferential groove 21, the first surface 1 faces the second component 30 so as to limit the second component 30 by abutting against it, while the second surface 2 is correspondingly opposed to the second component 30. The first surface 1 and the second surface 2 are both circumferentially extending surfaces and together define the physical contour of the retaining ring 10.

[0031] The first surface 1 of the retaining ring 10 may include a radial surface 3 and a chamfered surface 4. The radial surface 3 is located at the radial bottom of the first surface 1, is substantially received within the circumferential groove 21, and may extend, for example, radially or perpendicularly to the axial direction, thereby enabling it to engage with one sidewall of the circumferential groove 21 (in Figure 3(The right side wall is in the middle) is adapted. The chamfered surface 4 is located at the radial top of the first surface 1 relative to the radial surface 3, and is inclined in such a way that it gets closer to the second surface 2 axially as it moves towards the radial top side. In this application, terms such as "radial top side / top" and "radial bottom side / bottom" are used with reference to the bottom wall of the circumferential groove 21 on the first component 20, that is, the part that is radially away from or further away from the bottom wall of the circumferential groove 21 is called the radial "top", while the part that is radially toward or closer to the bottom wall is called the radial "bottom".

[0032] Continue to refer to Figure 3 As shown, the second surface 2 of the retaining ring 10 can be used to axially abut against a sidewall of the circumferential groove 21 when the first surface 1 (more specifically, its chamfered surface 4) abuts against the second component 30. Figure 3 The middle part is the left side wall), thereby fixing the retaining ring 10 in the axial direction, so that the retaining ring 10 can play an axial limiting role. The second surface 2 may include a limiting surface 5 and a guiding surface 6. The limiting surface 5 is located at the radial bottom of the second surface 2, which is substantially received in the circumferential groove 21, and may extend, for example, radially or perpendicularly to the axial direction, thereby facilitating a stable axial abutment against the side wall of the circumferential groove 21. Figure 3 (The left side wall of the first part). The guide surface 6 is located at the radial top of the second surface 2 relative to the limiting surface 5, and is inclined in such a way that it gets closer to the first surface 1 axially as it moves towards the radial top. As will be described in more detail below, the guide surface 6 serves to facilitate guiding the second part 30 over the retaining ring 10 that has been pre-installed in the circumferential groove 21 on the first part 20 when the second part 30 is fitted onto the first part 20.

[0033] The retaining ring 10 is configured to elastically contract or expand in the radial direction. More specifically, when the retaining ring 10 is received in the circumferential groove 21 in a free or normal state (without being subjected to any external force), the retaining ring 10 is not entirely located within the circumferential groove 21, but at least a portion of its radially top surface is located outside the circumferential groove 21 (therefore, its chamfered surface 4 is also at least partially located outside the circumferential groove 21), and the retaining ring 10 is particularly capable of elastic deformation towards the radially bottom side (i.e., towards the bottom wall of the circumferential groove 21). Figures 1 to 3 In the illustrated embodiment, this elastic deformation is an elastic contraction of the retaining ring 10 as a whole. In other embodiments, this elastic deformation may also be an elastic expansion of the retaining ring 10 as a whole.

[0034] After elastically contracting or expanding towards the radial bottom, the retaining ring 10 will correspondingly expand or contract towards the radial top under its own rebound force. For example, in Figures 1 to 3In the illustrated embodiment, the expansion is radially upward. This causes the chamfered surface 4 of the retaining ring 10 to tend to return to its free or normal state, at least partially outside the circumferential groove 21, whereby the chamfered surface 4 can touch the second component 30, for example, as... Figure 2 As shown, the chamfered surface 4 contacts the lower left corner of the radial cross-section of the second component 30 (in this embodiment, the leftmost and radially innermost corner of the inner ring of the bearing). Due to the inclined state of the chamfered surface 4, this contact tends to move the chamfered surface 4 and the entire retaining ring 10 axially to the left until the second surface 2 of the retaining ring 10 (more specifically, the limiting surface 5 of the second surface 2) abuts against the left side wall of the circumferential groove 21, while there may be a gap between the radial surface 3 of the first surface 1 of the retaining ring 10 and the right side wall of the circumferential groove 21. At this time, the chamfered surface 4 reaches a state of stable contact with the lower left corner of the second component 30.

[0035] In this arrival state, such as Figure 3 As shown, the retaining ring 10 applies a force F to the second component 30 through the chamfered surface 4. This force F is perpendicular to the inclined chamfered surface 4 and can therefore be decomposed into an axial force F1 along the axial direction and a radial force F2 along the radial direction. The axial force F1 provides an axial locking force to the second component 30, pressing it against the shoulder 22 of the first component 20, thereby limiting the axial position of the second component 30 relative to the first component 20. The radial force F2, pointing towards the radial top side, acts on the second component 30, causing the second component 30 to also apply a radial reaction force pointing towards the radial bottom side to the retaining ring 10. This radial reaction force can overcome the high centrifugal force generated by the retaining ring 10 when rotating at high speed with the first component 20, thereby preventing the retaining ring 10 from dislodging from the circumferential groove 21 due to the high centrifugal force. This allows the application of the retaining ring 10 to be unrestricted by the rotational speed of the first component. The chamfered surface 4 can be a straight inclined surface as shown in the figure in cross-section, but it can also be a curved inclined surface.

[0036] Furthermore, the ability of the retaining ring 10 to elastically contract or expand radially, along with the inclined chamfered surface 4, allows the retaining ring 10 to axially limit the second component 30 with different axial dimensions. For example, continuing to refer to... Figure 3As shown, for another second component 30 with a larger axial dimension than illustrated, its left axial end face will be located further to the left, but it can still abut against the chamfered surface 4 of the retaining ring 10 by further contracting the retaining ring 10 radially downwards, only the abutment point will move upwards along the chamfered surface 4; while for yet another second component 30 with a smaller axial dimension than illustrated, its left axial end face will be located further to the right, but it can still abut against the chamfered surface 4 by further springing the retaining ring 10 radially upwards, only the abutment point will move downwards along the chamfered surface 4. In this way, the retaining ring 10 can be adapted to second components 30 with different axial dimensions, thereby reducing the tolerance requirements between the axial dimension of the second component 30 and the axial position of the circumferential groove 21, and consequently reducing the requirements for machining. For example, without considering the axial position tolerance of the circumferential groove 21, the axial dimension tolerance of the second component 30 can be within the range of the axial projection length of the chamfered surface 4 (i.e., Figure 3 The axial range between the vertical dashed lines A1 and A2 in the figure varies, and the retaining ring 10 can be used to axially limit all second parts 30 whose axial dimensions are within this tolerance range.

[0037] Furthermore, the force applied to the retaining ring 10 by the second component 30 through the inclined chamfered surface 4 also helps to center the retaining ring axially when it is installed in the circumferential groove 21, thus preventing the retaining ring from becoming eccentric due to its own weight and thus avoiding poor or failed limiting effect.

[0038] The retaining ring 10 can take various forms or types, such as typically a C-shaped retaining ring with an opening. However, the present invention is not limited to this, and the retaining ring 10 can also take a closed structure, such as in the form of a spiral retaining ring.

[0039] The following reference Figure 4 Description based on Figures 1 to 3 The installation process of the axial limiting structure in the embodiment shown.

[0040] like Figure 4 As shown in (a), for example, the retaining ring 10 in the form of a C-shaped retaining ring is opened with retaining ring pliers and fitted onto the first component 20 (the left end in the figure) at one end of the first component 20 (the shaft-shaped component) with a circumferential groove 21 in the direction of the red arrow.

[0041] like Figure 4 As shown in (b), when the retaining ring 10 is moved along the first component 20 to the position of the circumferential groove 21, the retaining ring 10 is released so that the retaining ring 10 can elastically retract to return to a free state and be inserted into the circumferential groove 21. At this time, the guide surface 6 and the chamfer surface 4 of the retaining ring 10 are at least partially located outside the circumferential groove 21.

[0042] like Figure 4As shown in (c), the second component 30 (bearing type) is fitted onto the first component 20 from the left along the direction of the red arrow, and pushed to the right until it contacts the retaining ring 10. At this point, the second component 30 first contacts the guide surface 6 of the retaining ring 10, and then can slide along the guide surface 6, forcing the retaining ring 10 to elastically contract towards the radial bottom. It is easy to understand that the inclined guide surface 6 helps guide the second component 30 to slide over the retaining ring 10 and contract towards the radial bottom. The guide surface 6 can be a straight inclined plane as shown in the figure, but it can also be a smooth curved surface.

[0043] like Figure 4 As shown in (d), the second component 30 continues to slide to the right along the guide surface 6 until it slides to the radial top edge of the guide surface 6 and is completely located radially outside the entire retaining ring 10. During this process, the second component 30 causes the retaining ring 10 to further elastically contract radially inward until the entire retaining ring 10 is retracted into the circumferential groove 21. Optionally, the guide surface 6 may include a smooth portion 61 located at the radial top edge of the retaining ring 10, which allows the guide surface 6 to smoothly transition to the first surface 1 of the retaining ring 10 without forming sharp portions at the connection with the first surface 1, so as to prevent the second component 30 from being damaged by sharp portions when sliding along the guide surface 6 to the radial top edge.

[0044] like Figure 4 As shown in (e), the second component 30 is pushed further to the right, completely passing the radial top edge of the retaining ring 10 or the guide surface 6. At this time, the retaining ring 10 will return to a free state radially outward under its own elastic force, and thus the retaining ring 10, with its second surface 2 (limiting surface 5) abutting against the left side wall of the circumferential groove 21, will abut against the second component 30 through the inclined chamfered surface 4, and the chamfered surface 4 will be used to axially limit the second component 30. Thus, the installation of the entire axial limiting structure is completed simply and quickly.

[0045] The disassembly of the aforementioned axial limiting structure is also very simple. That is, after using a tool such as snap ring pliers to fully press the retaining ring 10 back into the circumferential groove 21, the second component 30 can be directly removed from the first component 20 to the left.

[0046] like Figure 3 As shown, optionally, the first surface 1 of the retaining ring 10 may also include a stepped surface 7. The stepped surface 7 may extend radially or perpendicularly to the axial direction from the radial top edge of the chamfered surface 4 toward the radial top side. On the one hand, the stepped surface 7 can form a stop surface to avoid the risk that the second component 30, which has a larger axial dimension, may cross the chamfered surface 4 to the left due to its contact with the chamfered surface 4 at a position relatively close to the radial top side; on the other hand, it is also less likely that a sharp part that could scratch the second component 30 will be formed between the radially extending stepped surface 7 and the guide surface 6.

[0047] Figures 1 to 3 The axial limiting structure shown is a shaft-type structure. That is, the first component 20 is a shaft-shaped component (e.g., a motor shaft), with a circumferential groove 21 and a shoulder 22 on its outer circumferential surface. The second component 30 (e.g., a bearing) is fitted onto the shaft-shaped component between the shoulder 22 and a retaining ring 10 received in the circumferential groove 21. In this case, the radial top side further away from the bottom wall of the circumferential groove 21 is the radial outer side of the first and second components and the retaining ring 10, while the radial bottom side closer to the bottom wall of the circumferential groove 21 is the radial inner side of the first and second components and the retaining ring 10. The chamfered surface 4 is located radially outer of the first surface 1, the radial surface 3 is located radially inner of the first surface 1, the guide surface 6 is located radially outer of the second surface 2, and the limiting surface 5 is located radially inner of the second surface 2. Accordingly, this utility model also provides a motor including the axial limiting structure according to the above embodiment, wherein the first component 20 is a motor shaft, and the second component 30 is a bearing for supporting the motor shaft.

[0048] This utility model is not limited to Figures 1 to 3 The above-described embodiments are shown. Figure 5 and 6 An axial limiting structure according to another embodiment of the present invention is shown, which is a hole-type structure. That is, the first component 20 is a hole-type component with an internal receiving hole, and a circumferential groove 21 and a shoulder 22 are provided on the inner circumferential surface defining the receiving hole. The second component 30 (which may also be a bearing) is received and positioned within the receiving hole between the shoulder 22 and a retaining ring 10 received in the circumferential groove 21. In this case, the radial top side further away from the bottom wall of the circumferential groove 21 is the radial inner side of the first and second components and the retaining ring 10, while the radial bottom side closer to the bottom wall of the circumferential groove 21 is the radial outer side of the first and second components and the retaining ring 10. The chamfered surface 4 is located radially inside the first surface 1, the radial surface 3 is located radially outside the first surface 1, the guide surface 6 is located radially inside the second surface 2, and the limiting surface 5 is located radially outside the second surface 2. Figure 5 and 6 The hole structure shown can also achieve the same result as... Figures 1 to 3 The shaft-type structure shown has essentially the same effect, especially suitable for axially limiting the second component 30 with different axial dimensions, and helps to center the retaining ring 10 axially in the circumferential groove 21.

[0049] Various modifications and variations can be made to the embodiments disclosed above without departing from the scope or spirit of this invention. Other embodiments of this invention will be apparent to those skilled in the art based on the practice of this invention disclosed in this specification. This specification and the examples disclosed herein should be considered illustrative only, and the true scope of this invention is defined by the appended claims and their equivalents.

Claims

1. A retaining ring (10) for receiving in a circumferential groove (21) on a first component (20) to limit the axial position of a second component (30) relative to the first component (20), the retaining ring comprising a first surface (1) facing and a second surface (2) facing away from the second component in the axial direction, respectively, characterized in that, The first surface (1) includes a chamfered surface (4) at its radial top, which is inclined closer to the second surface (2) axially toward the radial top side. The retaining ring (10), when received in the circumferential groove (21), can cause the chamfered surface (4) to abut against the second component (30) which has a different axial dimension by elastically contracting or expanding radially while the second surface (2) is axially abutting against the circumferential groove.

2. The retaining ring (10) according to claim 1, characterized in that, The second surface (2) includes a guide surface (6) at its radial top that is inclined closer to the first surface (1) in the axial direction as it moves toward the radial top side.

3. The retaining ring (10) according to claim 2, characterized in that, The guide surface (6) includes a smooth portion (61) located at the radial top edge of the retaining ring (10).

4. The retaining ring (10) according to claim 1, characterized in that, The second surface (2) includes a limiting surface (5) at its radial bottom that abuts against the sidewall of the circumferential groove (21) perpendicular to the axial direction.

5. The retaining ring (10) according to claim 1, characterized in that, The first surface (1) also includes a stepped surface (7) extending radially upward from the radial top edge of the chamfered surface (4) perpendicular to the axial direction.

6. The retaining ring (10) according to any one of claims 1 to 5, characterized in that, The retaining ring is in the form of a C-shaped retaining ring.

7. The retaining ring (10) according to any one of claims 1 to 5, characterized in that, The first component (20) is a shaft-shaped component, with a shoulder (22) and a circumferential groove (21) provided on the outer peripheral surface of the shaft-shaped component. The second component (30) is fitted on the shaft-shaped component between the shoulder and the retaining ring (10) received in the circumferential groove. The chamfered surface (4) is located radially outside the first surface (1).

8. An axial limiting structure, characterized in that, It includes a first component (20), a second component (30), and a retaining ring (10) according to any one of claims 1 to 7, the retaining ring being received in a circumferential groove (21) on the first component (20) to limit the axial position of the second component (30) relative to the first component (20).

9. The axial limiting structure according to claim 8, characterized in that, The first component (20) is a rotating shaft, and the second component (30) is a bearing mounted on the rotating shaft.

10. An electric motor, characterized in that, Includes the axial limiting structure according to claim 9.

Images