A self-locking retaining ring, electric drive and vehicle

Abstract

This invention relates to the field of vehicle technology and discloses a self-locking retaining ring, an electric drive, and a vehicle. The self-locking retaining ring is suitable for being disposed around the outer periphery of a rotating component. The self-locking retaining ring includes a retaining ring body and a tenon-and-mortise structure. The retaining ring body is an annular structure with an opening. The tenon-and-mortise structure includes a first tenon-and-mortise portion disposed on one side of the opening and a second tenon-and-mortise portion disposed on the other side of the opening. The self-locking retaining ring has a first state and a second state. In the first state, the first tenon-and-mortise portion and the second tenon-and-mortise portion are separated from each other, and the opening can be elastically opened. In the second state, the first tenon-and-mortise portion and the second tenon-and-mortise portion are engaged with each other to lock the opening in a closed state. Applying the technical solution of this invention can solve the problem that the locking reliability of existing self-locking retaining rings needs to be improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, specifically to a self-locking retaining ring, an electric drive, and a vehicle. Background Technology

[0002] In vehicle electric drive systems, bearing retainers are typically used for axial positioning of the bearing. These retainers are usually multi-layered spiral retainers or single-layer retainers with a break, allowing the inner diameter to expand elastically during assembly, facilitating the mounting of the retainer on the shaft. To reduce the risk of radial expansion and axial loosening of the bearing retainer due to centrifugal force, a self-locking structure is usually incorporated at the ends of the retainer to form a self-locking ring. For example, a self-locking structure with interlocking hooks is installed between the two ends of the bearing retainer. However, the self-locking structures of existing self-locking retainers still pose a risk of loosening under high-speed rotation conditions, and the locking reliability needs improvement. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this application is to provide a self-locking retaining ring, an electric drive, and a vehicle, which aims to solve the problem that the locking reliability of the self-locking retaining ring in the prior art needs to be improved.

[0004] In a first aspect, embodiments of this application provide a self-locking retaining ring, which is adapted to be disposed around the outer periphery of a rotating component. The self-locking retaining ring includes a retaining ring body and a tenon and mortise structure. The retaining ring body is an annular structure with an opening. The tenon and mortise structure includes a first tenon and mortise portion disposed on one side of the opening and a second tenon and mortise portion disposed on the other side of the opening. The self-locking retaining ring has a first state and a second state. In the first state, the first tenon and mortise portion are separated from each other, and the opening can be elastically opened. In the second state, the first tenon and mortise portion are tenon and mortise ...

[0005] By employing the above technical solution, the self-locking retaining ring is conveniently installed and reliably locked by switching between the first and second states. In the second state, the tenon and mortise structure forms a mechanical interlock, which effectively prevents the opening from accidentally opening under vibration or centrifugal force, thus improving the connection reliability of the self-locking retaining ring under high-speed rotation conditions.

[0006] In some embodiments, the first tenon is provided with a first tenon, and the second tenon is provided with a first mortise. The first tenon protrudes in a first direction circumferentially toward the retaining ring body, and the opening of the first mortise is provided in a second direction opposite to the first direction. In the first state, the first tenon and the first mortise are separated from each other; in the second state, the first tenon and the first mortise are joined together.

[0007] By adopting the above technical solution, the first tenon and the first mortise are set facing each other in the circumferential direction, which restricts the expansion of the opening in the circumferential direction and can better ensure the locking reliability of the self-locking retaining ring.

[0008] In some embodiments, at least one end of the first mortise extends through the retaining ring body along the axial direction of the retaining ring body to form an entrance for the first tenon to engage with the first mortise.

[0009] By adopting the above technical solution, during installation, the first tenon can be inserted into the first mortise from the inlet along the axial direction of the retaining ring body, which has the characteristic of being easy to install.

[0010] In some embodiments, the first tenon is a dovetail tenon, and the first mortise is a dovetail mortise.

[0011] Using the above technical solution, the first tenon and the first mortise form a dovetail-shaped tenon and mortise structure. The dovetail-shaped tenon and mortise structure has a self-locking characteristic. When the self-locking retaining ring is subjected to centrifugal force and has a radial expansion tendency, the dovetail bevel will convert this expansion tendency into a positive clamping force between the first tenon and the first mortise, thereby generating a self-locking effect of "the higher the rotation speed, the greater the locking force", which improves the locking reliability of the self-locking retaining ring.

[0012] In some embodiments, the root corner of the first tenon and the bottom corner of the first mortise are both rounded.

[0013] By adopting the above technical solution, the rounded corner structure can effectively reduce the stress concentration at the root corner of the first tenon and the bottom corner of the first mortise, avoid fatigue cracks at the corner under high-speed rotation or alternating load, and extend the service life of the self-locking retaining ring.

[0014] In some embodiments, in the second state, the angle between the dovetail bevels on both sides of the first mortise and the first radial plane of the self-locking retaining ring is 5°-20°, the position of the first radial plane corresponds to the position of the bottom of the first mortise, and the angle between the dovetail bevels on both sides of the first tenon and the first radial plane is 5°-20°.

[0015] By adopting the above technical solution, the inclination angle of the dovetail bevel is controlled within the range of 5°-20°. This ensures that there is sufficient self-locking force between the first tenon and the first mortise, and also prevents stress concentration at the root corner of the first tenon and the bottom corner of the first mortise due to excessive angle. This angle range is an optimized balance between high-speed operation and product reliability.

[0016] In some embodiments, the first mortise and tenon joint is provided with a second mortise groove, the second mortise and tenon joint is provided with a second tenon, the second tenon protrudes in the second direction, and the opening of the second mortise groove is provided in the first direction. In the first state, the second tenon and the second mortise groove are separated from each other; in the second state, the second tenon and the second mortise groove are joined together.

[0017] By adopting the above technical solution, two sets of tenon and mortise joints are formed on both sides of the opening, so that the self-locking retaining ring is subjected to more balanced force in the closed state, forming a more complete annular retaining ring structure with better surface flatness and circumferential uniformity, which further improves the durability and locking reliability of the self-locking retaining ring.

[0018] In some embodiments, at least one end of the second mortise extends through the retaining ring body along the axial direction of the retaining ring body to form an entrance for the second tenon to engage with the second mortise.

[0019] By adopting the above technical solution, during installation, the second tenon can be inserted into the second mortise from the inlet along the axial direction of the retaining ring body, which has the feature of easy installation.

[0020] In some embodiments, the second tenon is a dovetail tenon, and the second mortise is a dovetail mortise.

[0021] Using the above technical solution, the second tenon and the second mortise form a dovetail-shaped tenon and mortise structure. The dovetail-shaped tenon and mortise structure has a self-locking characteristic. When the self-locking retaining ring is subjected to centrifugal force and has a radial expansion tendency, the dovetail bevel will convert this expansion tendency into a positive clamping force between the second tenon and the second mortise, thereby generating a self-locking effect of "the higher the rotation speed, the greater the locking force", which improves the locking reliability of the self-locking retaining ring.

[0022] In some embodiments, the root corner of the second tenon and the bottom corner of the second mortise are both provided with rounded corners.

[0023] By adopting the above technical solution, the rounded corner structure effectively reduces the stress concentration at the root corner of the second tenon and the bottom corner of the second mortise, avoids fatigue cracks at the corners under high-speed rotation or alternating loads, and extends the service life of the self-locking retaining ring.

[0024] In some embodiments, in the second state, the angle between the dovetail bevels on both sides of the second mortise and the second radial plane of the self-locking retaining ring is 5°-20°, the position of the second radial plane corresponds to the position of the bottom of the second mortise, and the angle between the dovetail bevels on both sides of the second tenon and the second radial plane is 5°-20°.

[0025] By adopting the above technical solution, the inclination angle of the dovetail bevel is controlled within the range of 5°-20°. This ensures that there is sufficient self-locking force between the second tenon and the second mortise, and also prevents stress concentration at the root corner of the second tenon and the bottom corner of the second mortise due to excessive angle. This angle range is an optimized balance between high-speed operation and product reliability.

[0026] Secondly, this application provides an electric drive including a shaft, a bearing, and a self-locking retaining ring as described above. The self-locking retaining ring is disposed around the outer periphery of the shaft, and the bearing is mounted on the outer periphery of the shaft. The self-locking retaining ring is used to limit the bearing along the axial direction of the shaft.

[0027] By adopting the above technical solution, the self-locking retaining ring in the electric drive can maintain good self-locking ability when rotating at high speed, and has a self-locking effect of "the higher the speed, the greater the locking force". It can effectively prevent the self-locking retaining ring from coming off the shaft due to centrifugal force or alternating axial load, which significantly improves the operating safety and service life of the electric drive system under ultra-high speed conditions.

[0028] Thirdly, this application provides a vehicle including the aforementioned electric drive. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application will be described below.

[0030] Figure 1 This is a schematic diagram of the structure of the self-locking retaining ring disclosed in an embodiment of this application; Figure 2 This is a schematic diagram of the mortise and tenon structure disclosed in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the first tenon joint disclosed in the embodiment of this application; Figure 4 This is a schematic diagram of the structure of the second tenon joint disclosed in the embodiment of this application; Figure 5 This is a schematic diagram of the installation of the self-locking retaining ring disclosed in an embodiment of this application; Figure 6 This is a schematic diagram of the vehicle disclosed in the embodiments of this application.

[0031] Explanation of reference numerals in the attached diagram: 1-Vehicle; 2-Electric drive; 3-Reducer; 21-Motor stator; 22-Motor rotor; 23-Motor shaft; 24-Bearing; 25-Self-locking retaining ring; 2501 - Retaining ring body; 2502 - Mortise and tenon structure; 2503 - First mortise and tenon part; 2504 - Second mortise and tenon part; 2505 - First tenon; 2506 - Second mortise; 2507 - Second tenon; 2508 - First mortise; 2509 - First dovetail bevel; 2510 - Second dovetail bevel; 2511 - First rounded corner; 2512 - Second rounded corner; 2513 - Third dovetail bevel; 2514 - Fourth dovetail bevel; 2515 - Third rounded corner; 2516 - Fourth rounded corner. Detailed Implementation

[0032] The terms “first,” “second,” etc., are used for descriptive purposes only and have no sequential or technical meaning, nor should they be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0033] The directional terms used in this application, such as "first direction" and "second direction," are only for reference to the orientation shown in the accompanying drawings. The use of directional terms is for the purpose of better and clearer explanation and understanding of this application, and is not intended to indicate the orientation of the device or component in a practical application scenario.

[0034] The embodiments of this application are described below with reference to the accompanying drawings.

[0035] As described in the background art, in the electric drive system of a vehicle, bearing retainers are typically used for axial positioning of the bearing. These retainers are usually multi-layered spiral retainers or single-layer retainers with a break, allowing the inner diameter of the retainer to expand elastically during assembly, facilitating its placement on the shaft. To reduce the risk of radial expansion and axial loosening of the bearing retainer due to centrifugal force, a self-locking structure is usually provided at the ends of the retainer to form a self-locking retainer, such as a self-locking structure with interlocking hooks between the two ends of the retainer. However, the self-locking structure of existing self-locking retainers still carries the risk of loosening under high-speed rotation conditions, and the locking reliability needs improvement.

[0036] To address this technical problem, this application proposes a self-locking retaining ring. Please refer to... Figures 1 to 4 , Figure 1 This is a schematic diagram of the structure of the self-locking retaining ring 25 disclosed in an embodiment of this application; Figure 2 This is a schematic diagram of the mortise and tenon structure 2502 disclosed in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the first tenon joint disclosed in the embodiment of this application; Figure 4This is a schematic diagram of the structure of the second mortise and tenon joint disclosed in an embodiment of this application. The self-locking retaining ring 25 is adapted to be disposed around the outer periphery of the rotating part. The self-locking retaining ring 25 includes a retaining ring body 2501 and a mortise and tenon structure 2502. The retaining ring body 2501 is an annular structure with an opening. The mortise and tenon structure 2502 includes a first mortise and tenon part 2503 disposed on one side of the opening and a second mortise and tenon part 2504 disposed on the other side of the opening. The self-locking retaining ring 25 has a first state and a second state. In the first state, the first mortise and tenon part 2503 and the second mortise and tenon part 2504 are separated from each other, and the opening can be elastically opened. In the second state, the first mortise and tenon part 2503 and the second mortise and tenon part 2504 are mortised and tenoned together to lock the opening in a closed state.

[0037] By adopting the above technical solution, the self-locking retaining ring 25 is conveniently installed and reliably locked by switching between the first and second states. In the second state, the tenon and mortise structure 2502 forms a mechanical interlock, which can effectively prevent the opening from accidentally opening under vibration or centrifugal force, thereby improving the connection reliability of the self-locking retaining ring 25 under high-speed rotation conditions.

[0038] In some embodiments, the first tenon 2503 is provided with a first tenon 2505, and the second tenon 2504 is provided with a first mortise 2508. The first tenon 2505 protrudes in a first direction circumferentially toward the retaining ring body 2501, and the opening of the first mortise 2508 is provided in a second direction circumferentially toward the retaining ring body 2501 opposite to the first direction. In a first state, the first tenon 2505 and the first mortise 2508 are separated from each other; in a second state, the first tenon 2505 and the first mortise 2508 are joined together.

[0039] With the above technical solution, the first tenon 2505 and the first mortise 2508 are arranged facing each other in the circumferential direction of the retaining ring body 2501, which restricts the circumferential expansion of the opening and can better ensure the locking reliability of the self-locking retaining ring 25.

[0040] In some embodiments, at least one end of the first mortise 2508 extends through the retaining ring body 2501 along the axial direction of the retaining ring body 2501 to form an entrance for the first tenon 2505 to engage with the first mortise 2508.

[0041] With the above technical solution, during installation, the operator can insert the first tenon 2505 into the first mortise 2508 from the inlet along the axial direction of the retaining ring body 2501, which is easy to install.

[0042] As a preferred embodiment, both ends of the first mortise 2508 penetrate the retaining ring body 2501 along the axial direction of the retaining ring body 2501.

[0043] In some embodiments, the first tenon 2505 is a dovetail tenon, and the first mortise 2508 is a dovetail mortise. That is, the first tenon 2505 has dovetail bevels on both sides of the retaining ring body 2501 in the radial direction, and the first mortise 2508 has dovetail bevels on both sides of the groove wall in the radial direction of the retaining ring body 2501.

[0044] Using the above technical solution, the first tenon 2505 and the first mortise 2508 form a dovetail-shaped tenon and mortise structure. This dovetail-shaped structure has a self-locking characteristic. When the self-locking retaining ring 25 is subjected to centrifugal force and has a radial expansion tendency, the dovetail bevel converts this expansion tendency into a clamping force between the first tenon 2505 and the first mortise 2508, thus generating a self-locking effect where "the higher the rotational speed, the greater the locking force," improving the locking reliability of the self-locking retaining ring. More specifically, when the self-locking retaining ring 25 rotates at high speed, centrifugal force causes it to have a radial expansion tendency. This tendency is converted into a circumferential clamping force between the first tenon and the first mortise through the dovetail bevel, thereby automatically enhancing the locking effect of the self-locking retaining ring 25.

[0045] In some embodiments, the root corner of the first tenon 2505 and the bottom corner of the first mortise 2508 are both provided with rounded corners.

[0046] By adopting the above technical solution, the rounded corner structure can effectively reduce the stress concentration at the root corner of the first tenon 2505 and the bottom corner of the first mortise 2508, avoid fatigue cracks at the corners under high-speed rotation or alternating loads, and extend the service life of the self-locking retaining ring 25.

[0047] In some embodiments, in the second state, the angle between the dovetail bevels on both sides of the first mortise 2508 and the first radial plane is 5°-20°, the position of the first radial plane corresponds to the position of the bottom of the first mortise 2508, and the angle between the dovetail bevels on both sides of the first tenon 2505 and the first radial plane of the self-locking retaining ring 25 is 5°-20°.

[0048] By adopting the above technical solution, the inclination angle of the dovetail bevel is controlled within the range of 5°-20°. This ensures that there is sufficient self-locking force between the first tenon 2505 and the first mortise 2508, and also prevents stress concentration at the root corner of the first tenon 2505 and the bottom corner of the first mortise 2508 due to excessive angle. This angle range is an optimized balance between high-speed operation and product reliability.

[0049] As a preferred embodiment, the angle between the dovetail bevels on both sides of the first tenon 2505 and the first radial plane is 10°, and the angle between the dovetail bevels on both sides of the first mortise 2508 and the first radial plane is 10°.

[0050] In specific implementation, the first radial plane refers to the plane that passes through the center of the bottom of the first mortise 2508 and includes the central axis of the self-locking retaining ring 25.

[0051] In some embodiments, the first tenon 2503 is provided with a second mortise 2506, the second tenon 2504 is provided with a second tenon 2507, the second tenon 2507 protrudes in a second direction, and the groove of the second mortise 2506 is provided in a first direction. In a first state, the second tenon 2507 and the second mortise 2506 are separated from each other; in a second state, the second tenon 2507 and the second mortise 2506 are joined together.

[0052] By adopting the above technical solution, two sets of tenon and mortise joints are formed on both sides of the opening, which makes the force on the self-locking retaining ring 25 more balanced in the closed state, forming a more complete annular retaining ring structure with better surface flatness and circumferential uniformity, further improving the durability and locking reliability of the self-locking retaining ring 25.

[0053] As a preferred example, the first tenon 2503 and the second tenon 2504 are tenon-tenoned together to form a section of the self-locking retaining ring 25 in the circumferential direction. The cross-sectional dimensions of this section are consistent with the cross-sectional dimensions of the other parts of the self-locking retaining ring 25, forming a more uniform and complete annular retaining ring structure, which helps to reduce vibration and noise during the rotation of the self-locking retaining ring 25.

[0054] In some embodiments, at least one end of the second mortise 2506 extends through the retaining ring body 2501 along the axial direction of the retaining ring body 2501 to form an entrance for the second tenon 2507 to engage with the second mortise 2506.

[0055] By adopting the above technical solution, during installation, the second tenon 2507 can be inserted into the second mortise 2506 from the inlet along the axial direction of the retaining ring body 2501, which has the feature of easy installation.

[0056] As a preferred example, both ends of the second mortise 2506 penetrate the retaining ring body 2501 along the axial direction of the retaining ring body 2501.

[0057] During installation, first, fit the self-locking retaining ring 25 into the retaining ring slot reserved in the shaft, and then close the first tenon 2503 and the second tenon 2504 along the axial direction of the self-locking retaining ring 25, so that the first tenon 2503 and the second tenon 2504 engage with each other to form a complete tenon structure 2502.

[0058] In some embodiments, the second tenon 2507 is a dovetail tenon, and the second mortise 2506 is a dovetail mortise. That is, the second tenon 2507 has dovetail bevels on both sides of the retaining ring body 2501 in the radial direction, and the second mortise 2506 has dovetail bevels on both sides of the groove wall in the radial direction of the retaining ring body 2501.

[0059] Using the above technical solution, the second tenon 2507 and the second mortise 2506 form a dovetail-shaped tenon and mortise structure. The dovetail-shaped tenon and mortise structure has a self-locking characteristic. When the self-locking retaining ring 25 is subjected to centrifugal force and has a radial expansion tendency, the dovetail slope transforms this expansion tendency into a positive clamping force between the second tenon 2507 and the second mortise 2506, thereby generating a self-locking effect of "the higher the rotation speed, the greater the locking force", which improves the locking reliability of the self-locking retaining ring 25.

[0060] In some embodiments, the root corner of the second tenon 2507 and the bottom corner of the second mortise 2506 are both provided with rounded corners.

[0061] By adopting the above technical solution, the rounded corner structure effectively reduces the stress concentration at the root corner of the second tenon 2507 and the bottom corner of the second mortise 2506, avoids fatigue cracks at the corners under high-speed rotation or alternating loads, and extends the service life of the self-locking retaining ring 25.

[0062] In some embodiments, in the second state, the angle between the dovetail bevels on both sides of the second mortise 2506 and the second radial plane is 5°-20°, the position of the second radial plane corresponds to the position of the bottom of the second mortise 2506, and the angle between the dovetail bevels on both sides of the second tenon 2507 and the second radial plane of the self-locking retaining ring 25 is 5°-20°.

[0063] In practical implementation, the second radial plane refers to the plane that passes through the center of the bottom of the second mortise 2506 and includes the central axis of the self-locking retaining ring 25.

[0064] As a preferred embodiment, the angle between the dovetail bevels on both sides of the second tenon 2507 and the second radial plane is 10°, and the angle between the dovetail bevels on both sides of the second mortise 2506 and the second radial plane is 10°.

[0065] As a preferred example, the first mortise and tenon joint 2503 is provided with a plurality of first tenons 2505 and a plurality of second mortises 2506. The plurality of first tenons 2505 and the plurality of second mortises 2506 are alternately arranged along the radial direction of the self-locking retaining ring 25. By machining the first mortise and tenon joint 2503 to form a plurality of second mortises 2506, a plurality of first tenons 2505 can be formed. The dovetail bevel on the inner side of the first tenon 2505 forms the dovetail bevel on the outer side of the second mortises 2506 adjacent to the inner side of the first tenon 2505. The dovetail bevel on the outer side of the first tenon 2505 forms the dovetail bevel on the inner side of the second mortises 2506 adjacent to the outer side of the first tenon 2505. The dovetail bevel on the inner side of the first tenon 2505 and the dovetail bevel on the outer side of the second mortise 2506 are both first dovetail bevels 2509. The dovetail bevel on the outer side of the first tenon 2505 and the dovetail bevel on the inner side of the second mortise 2506 are both second dovetail bevels 2510. The root corner of the first tenon 2505 and the bottom corner of the second mortise 2506 are both first rounded corners 2511. The end corner of the first tenon 2505 is set as a second rounded corner 2512. The second tenon 2504 is provided with a plurality of second tenons 2507 and a plurality of first mortises 2508. The plurality of second tenons 2507 and the plurality of first mortises 2508 are arranged alternately along the radial direction of the self-locking retaining ring 25. By machining the second tenon 2504 to form a plurality of first mortises 2508, a plurality of second tenons 2507 can be formed. The dovetail bevel on the inner side of the second tenon 2507 forms the dovetail bevel on the outer side of the first mortises 2508 adjacent to the inner side of the second tenon 2507. The dovetail bevel on the outer side of the second tenon 2507 forms the dovetail bevel on the inner side of the first mortises 2508 adjacent to the outer side of the second tenon 2507. The dovetail bevel on the outer side of the second tenon 2507 and the dovetail bevel on the inner side of the first mortise 2508 are both third dovetail bevels 2513. The dovetail bevel on the inner side of the second tenon 2507 and the dovetail bevel on the outer side of the first mortise 2508 are both fourth dovetail bevels 2514. The root corner of the second tenon 2507 and the bottom corner of the first mortise 2508 are both provided with third rounded corners 2515. The end corner of the second tenon 2507 is provided with fourth rounded corners 2516.

[0066] The above technical solution achieves a high degree of synergy between bidirectional self-locking, convenient installation, and reduced stress concentration, making it particularly suitable for ultra-high-speed electric drive applications with speeds exceeding 20,000 rpm.

[0067] In some embodiments, the self-locking retaining ring 25 is made of spring steel, and the surface of the self-locking retaining ring 25 is provided with a wear-resistant coating. Spring steel provides good elastic deformation capacity, while the wear-resistant coating improves long-term operational reliability.

[0068] The working principle of the aforementioned self-locking retaining ring 25 is based on the self-locking characteristics of the traditional Chinese mortise and tenon structure and the mechanical coupling under high-speed rotation conditions. Specifically: Once the self-locking retaining ring 25 is installed in place, the dovetail tenon is fully embedded in the dovetail mortise, forming a mechanical interlock. In a stationary state, the initial locking force is provided by the interference or transition fit between the dovetail tenon and the dovetail mortise.

[0069] When the self-locking retaining ring 25 rotates at high speed, the retaining ring body 2501 is subjected to centrifugal force, resulting in a radially outward expansion tendency. Since the mating surfaces of the dovetail tenon and the dovetail mortise are both dovetail bevels, this radial expansion tendency is decomposed into two components: one part causes the self-locking retaining ring 25 to elongate circumferentially, and the other part is converted into the clamping force between the dovetail tenon and the dovetail mortise. As the rotational speed increases, the centrifugal force increases, and the clamping force between the dovetail tenon and the dovetail mortise also increases, thus making the mortise and tenon structure 2502 increasingly tighter.

[0070] The mortise and tenon structure 2502, with its characteristic of "the higher the rotational speed, the greater the locking force," fundamentally solves the problem of traditional retaining rings expanding radially due to centrifugal force under high-speed conditions, thus dislodging from the retaining ring slot. Simultaneously, because the dovetail-shaped mortise and tenon structure 2502 itself has good shear resistance, it also exhibits excellent resistance to axial alternating loads.

[0071] The self-locking retaining ring 25 proposed in the above embodiments has the following characteristics: Significant self-locking effect: By introducing the dovetail tenon and dovetail mortise matting structure, the unfavorable factor of centrifugal force that causes the self-locking retaining ring 25 to loosen is transformed into a favorable factor that enhances locking, achieving a self-locking effect that "gets tighter the more it is turned".

[0072] Strong axial load capacity: The tenon and mortise joint structure has good shear resistance and can effectively resist the alternating axial load generated by the high-speed rotation of the self-locking retaining ring 25, preventing the self-locking retaining ring 25 from coming off.

[0073] Compact and reliable structure: The self-locking retaining ring 25 adopts an integrated open ring design, eliminating the need for additional locking parts. Its simple and reliable structure is suitable for the space constraints of miniature precision bearings. The self-locking retaining ring 25 also features ease of manufacture, ease of installation, and strong overall integrity after installation.

[0074] Please see Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the installation of the self-locking retaining ring disclosed in an embodiment of this application; Figure 6This is a schematic diagram of a vehicle disclosed in an embodiment of this application. The electric drive 2 includes a shaft, a bearing 24, and the aforementioned self-locking retaining ring 25. The self-locking retaining ring 25 is disposed around the outer periphery of the shaft, and the bearing 24 is mounted on the outer periphery of the shaft. The self-locking retaining ring 25 is used to limit the bearing 24 along the axial direction of the shaft.

[0075] By adopting the above technical solution, the self-locking retaining ring 25 in the electric drive 2 can maintain good self-locking ability as the rotation speed increases during high-speed rotation, and has a self-locking effect of "the higher the rotation speed, the greater the locking force", which effectively prevents the self-locking retaining ring 25 from coming off the shaft due to centrifugal force or alternating axial load, and significantly improves the operating safety and service life of the electric drive 2 under ultra-high speed conditions.

[0076] As a specific example, the shaft is the motor shaft 23 of the electric drive 2. The electric drive 2 also includes a motor stator 21 and a motor rotor 22, and the motor shaft 23 is connected to the motor rotor 22.

[0077] In practical implementation, the shaft is usually provided with an annular retaining ring groove, and the self-locking retaining ring 25 is installed in the retaining ring groove. The retaining ring groove limits the self-locking retaining ring 25 along the axial direction of the shaft. The self-locking retaining ring 25 is used to limit the bearing 24 along the axial direction of the shaft.

[0078] Please see Figure 6 , Figure 6 This is a schematic diagram of a vehicle 1 disclosed in an embodiment of this application. The vehicle 1 includes the electric drive 2 and the reducer 3 described above, and the output end of the electric drive 2 is connected to the input end of the reducer 3.

[0079] In specific implementation, vehicle 1 can be, but is not limited to, a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle.

[0080] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this application still fall within the scope of this application.

Claims

1. A self-locking retaining ring, said self-locking retaining ring (25) being adapted to be arranged around the outer periphery of a rotating component, characterized in that, The self-locking retaining ring (25) includes a retaining ring body (2501) and a tenon structure (2502). The retaining ring body (2501) is an annular structure with an opening. The tenon structure (2502) includes a first tenon part (2503) disposed on one side of the opening and a second tenon part (2504) disposed on the other side of the opening. The self-locking retaining ring (25) has a first state and a second state. In the first state, the first tenon part (2503) and the second tenon part (2504) are separated from each other, and the opening can be elastically opened. In the second state, the first tenon part (2503) and the second tenon part (2504) are tenon-tenon joined to lock the opening in a closed state.

2. The self-locking retaining ring as described in claim 1, characterized in that, The first tenon (2503) is provided with a first tenon (2505), and the second tenon (2504) is provided with a first mortise (2508). The first tenon (2505) protrudes in a first direction circumferentially toward the retaining ring body (2501), and the groove of the first mortise (2508) is set in a second direction opposite to the first direction. In the first state, the first tenon (2505) and the first mortise (2508) are separated from each other; in the second state, the first tenon (2505) and the first mortise (2508) are joined together.

3. The self-locking retaining ring as described in claim 2, characterized in that, At least one end of the first mortise (2508) extends through the retaining ring body (2501) along the axial direction of the retaining ring body (2501) to form an entrance for the first tenon (2505) to engage with the first mortise (2508).

4. The self-locking retaining ring as described in claim 2, characterized in that, The first tenon (2505) is a dovetail tenon, and the first mortise (2508) is a dovetail mortise.

5. The self-locking retaining ring as described in claim 4, characterized in that, The root corner of the first tenon (2505) and the bottom corner of the first mortise (2508) are both rounded.

6. The self-locking retaining ring as described in claim 4, characterized in that, In the second state, the angle between the dovetail bevels on both sides of the first mortise (2508) and the first radial plane of the self-locking retaining ring (25) is 5°-20°, the position of the first radial plane corresponds to the position of the bottom of the first mortise (2508), and the angle between the dovetail bevels on both sides of the first tenon (2505) and the first radial plane is 5°-20°.

7. The self-locking retaining ring as described in claim 2, characterized in that, The first tenon (2503) is provided with a second mortise (2506), and the second tenon (2504) is provided with a second tenon (2507). The second tenon (2507) protrudes in the second direction, and the groove of the second mortise (2506) is provided in the first direction. In the first state, the second tenon (2507) and the second mortise (2506) are separated from each other. In the second state, the second tenon (2507) and the second mortise (2506) are joined together.

8. The self-locking retaining ring as described in claim 7, characterized in that, At least one end of the second mortise (2506) passes through the retaining ring body (2501) along the axial direction of the retaining ring body (2501) to form an entrance for the second tenon (2507) to be inserted into the second mortise (2506); the second tenon (2507) is a dovetail tenon, and the second mortise (2506) is a dovetail mortise; the root corner of the second tenon (2507) and the bottom corner of the second mortise (2506) are both rounded; in the second state, the angle between the dovetail bevels on both sides of the second mortise (2506) and the second radial plane of the self-locking retaining ring (25) is 5°-20°, the position of the second radial plane corresponds to the position of the bottom of the second mortise (2506), and the angle between the dovetail bevels on both sides of the second tenon (2507) and the second radial plane is 5°-20°.

9. An electric drive, characterized in that, The assembly includes a shaft, a bearing (24), and a self-locking retaining ring (25) as described in any one of claims 1-8. The self-locking retaining ring (25) is disposed around the outer periphery of the shaft, and the bearing (24) is mounted on the outer periphery of the shaft. The self-locking retaining ring (25) is used to limit the bearing (24) along the axial direction of the shaft.

10. A vehicle, characterized in that, Includes the electric drive (2) as described in claim 9.

Images