Oil seal guide tool for assembling motor shaft of permanent magnet synchronous motor
By designing an oil seal guide tooling including the small diameter end of the round body and the cylinder, the problems of oil seal lip turn and space occupation are solved, and compact motor shaft assembly and efficient oil seal guide are achieved.
Patent Information
- Application Number
- CN202420084599.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-12
AI Technical Summary
In the three-in-one powertrain oil cooling scheme of new energy vehicles, the oil cooling of the permanent magnet synchronous motor and the gearbox needs to be separated. The existing oil seal lip guide tooling is equipped with a tapered structure on the motor shaft, which leads to a higher occupation. Large axial space and easy to oil seal the lips when assembled.
An oil seal guide tooling including a first cylinder, a second cylinder and a round body is designed. The oil seal lip mouth gradually expands through contact and sliding of the small diameter end of the round body to avoid lip turning, and passes through threaded holes and splines. Fixed to achieve a compact axial design.
Effectively prevent the oil sealing lip from turning, reducing the space occupied by the tapered structure on the motor shaft, and improving assembly efficiency and space utilization.
Smart Images
Figure CN222147355U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor assembly, in particular to an oil seal guide tool used for assembling a motor shaft of a permanent magnet synchronous motor. Background Art
[0002] The three-in-one powertrain oil cooling solution commonly used in new energy vehicles currently requires oil cooling for the permanent magnet synchronous motor and the reduction gearbox. When the permanent magnet synchronous motor and the reduction gearbox need to be oil cooled separately, an oil seal is needed to separate the two oils for different purposes. When assembling the oil seal, an oil seal lip guide tool is required. The oil seal lip guide structure of the existing oil seal lip guide tool is usually provided with a conical structure on the motor shaft. The larger the inner diameter of the oil seal, the larger the axial dimension space occupied by the conical structure on the motor shaft. It not only solves the problem of preventing the oil seal lip from flipping when assembling the motor shaft, but also achieves the purpose of compressing the conical structure on the motor shaft to occupy a large axial dimension space. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide an oil seal guide tooling for assembling the motor shaft of a permanent magnet synchronous motor, the oil seal guide tooling can effectively solve the problem of preventing the oil seal lip from flipping when assembling the motor shaft, and achieves the purpose of compressing the conical structure on the motor shaft to occupy a larger axial dimension space.
[0004] The technical solution adopted by the utility model to solve the technical problem is as follows: the oil seal guide tooling for assembling the motor shaft of the permanent magnet synchronous motor comprises a first cylinder, a second cylinder and a frustum;
[0005] The left end of the first cylinder is fixedly connected to the large diameter end of the truncated cone, the diameter of the first cylinder is equal to the diameter of the large diameter end of the truncated cone, and the diameter of the first cylinder matches the outer diameter of the left end face of the motor shaft;
[0006] The right end of the first cylinder is fixedly connected to the left end of the second cylinder, the diameter of the second cylinder is smaller than the diameter of the first cylinder, the diameter of the second cylinder is adapted to the inner diameter of the mounting hole set at the left end of the motor shaft, the second cylinder is located in the mounting hole and the right end face of the second cylinder is in contact with the left end face of the motor shaft;
[0007] A light hole is provided at the center of the right end surface of the second cylinder, and the light hole extends along the circumferential direction of the second cylinder to the left end surface of the first cylinder;
[0008] The left end surface of the truncated cone body is provided with a threaded hole which is communicated with the light hole. The threaded hole is used to fix the entire guide fixture to the motor shaft in a bolted manner.
[0009] Furthermore, the central axes of the first cylinder, the second cylinder and the frustum coincide with each other.
[0010] Furthermore, the second cylinder is connected to the motor shaft via an inner shaft spline and their central axes coincide with each other.
[0011] Furthermore, the end surface of the small diameter end of the truncated cone is rounded.
[0012] Furthermore, the connection between the left end of the first cylinder and the large diameter end of the truncated cone is rounded.
[0013] Furthermore, the right end surface of the second cylinder is an inclined surface.
[0014] Furthermore, the connection between the right end of the first cylinder and the left end of the second cylinder is rounded.
[0015] Furthermore, the first cylinder, the second cylinder and the frustum are integrally formed by steel casting.
[0016] The beneficial effects of the utility model are as follows:
[0017] 1. The guide fixture provided by the utility model is provided with a larger conical structure, that is, a truncated cone body. During the assembly process, the lip of the oil seal first contacts the small diameter end of the truncated cone body, and the lip of the oil seal slides from the small diameter end of the truncated cone body to the large diameter end. During the sliding process, the lip of the oil seal is gradually and evenly expanded by the truncated cone body, thereby preventing the lip of the oil seal from turning over, so as to achieve the purpose of guidance.
[0018] 2. There is no large conical structure on the motor shaft, which compresses the axial dimension of the motor shaft and achieves the purpose of compressing the conical structure on the motor shaft to occupy a large axial dimension space. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a cross-sectional schematic diagram of the oil seal guide tooling used for assembling the motor shaft of the permanent magnet synchronous motor described in the utility model;
[0020] Figure 2 It is a structural schematic diagram of the guide tooling and motor combination described in the utility model;
[0021] Figure 3 yes Figure 2 A partial enlarged view of middle A;
[0022] Explanation of the markings in the figure: motor housing 1, oil seal 2, stator assembly 3, guide tooling 4, first cylinder 401, second cylinder 402, frustum 403, light hole 404, threaded hole 405, bearing 5, front rotor end plate 6, motor shaft 7, rotor core 8, rear rotor end plate 9. DETAILED DESCRIPTION
[0023] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0024] It should be noted that the directions or positional relationships indicated by all directional indication terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" in the embodiments of the present application are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. They are only used to explain the relative positional relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0025] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0027] like Figure 1-3As shown, the oil seal guide tooling for assembling the motor shaft of the permanent magnet synchronous motor includes a first cylinder 401, a second cylinder 402, and a truncated cone 403. The permanent magnet synchronous motor mainly includes a motor housing 1, an oil seal 2, a stator assembly 3, a bearing 5, a front rotor end plate 6, a motor shaft 7, a rotor core 8, and a rear rotor end plate 9. It is a prior art and will not be described in detail here.
[0028] The left end of the first cylindrical body 401 is fixedly connected to the large diameter end of the truncated cone body 403. The diameter of the first cylindrical body 401 is equal to the diameter of the large diameter end of the truncated cone body 403. The diameter of the first cylindrical body 401 matches the outer diameter of the left end face of the motor shaft 7. By adopting the design of the truncated cone body 403, the oil seal lip slides from the small diameter end to the large diameter end of the truncated cone body 403. During the sliding process, the oil seal lip is gradually and evenly expanded by the truncated cone body 403, thereby preventing the oil seal lip from turning over and achieving the purpose of guiding. The oil seal is guided onto the motor shaft 7 through the truncated cone body 403 and the first cylindrical body 401 in turn to achieve guided installation.
[0029] The right end of the first cylinder 401 is fixedly connected to the left end of the second cylinder 402. The diameter of the second cylinder 402 is smaller than the diameter of the first cylinder 401. The diameter of the second cylinder 402 is adapted to the inner diameter of the mounting hole set at the left end of the motor shaft 7. The second cylinder 402 is located in the mounting hole and the right end face of the second cylinder 402 is in contact with the left end face of the motor shaft 7. The entire guide fixture and the motor shaft 7 are detachably mounted through the second cylinder 402.
[0030] A light hole 404 is provided at the center of the right end surface of the second cylinder 402. The light hole 404 extends along the circumferential direction of the second cylinder 402 to the left end surface of the first cylinder 401. The light hole 404 is provided to reduce the weight of the entire tooling, improve the convenience of operation, and thus improve work efficiency.
[0031] The left end face of the truncated cone body 403 is provided with a threaded hole 405 which is interconnected with the light hole 404. The threaded hole 405 is used to fix the entire guide fixture to the motor shaft 7 by means of bolts. The installation and disassembly of the entire guide fixture and the motor shaft 7 can be achieved by means of bolt connection, which is convenient for operation.
[0032] like Figure 1 As shown, in this embodiment, preferably, the central axes of the first cylinder 401, the second cylinder 402, and the frustum 403 coincide with each other.
[0033] In this embodiment, preferably, the second cylinder 402 and the motor shaft 7 are connected by an inner spline and their central axes coincide with each other, so as to further enhance the stability between the second cylinder 402 and the motor shaft 7 and prevent the second cylinder 402 from rotating in the mounting hole.
[0034] like Figure 1 As shown, in this embodiment, preferably, the end surface of the small diameter end of the truncated cone body 403 is rounded, so that the oil seal can be better inserted into the small diameter end of the truncated cone body 403.
[0035] like Figure 1 As shown, in this embodiment, preferably, the connection between the left end of the first cylinder 401 and the large diameter end of the frustum body 403 is rounded, so that the oil seal can slide better from the large diameter end of the frustum body 403 to the first cylinder 401.
[0036] like Figure 1 As shown, in the present embodiment, preferably, the right end face of the second cylinder 402 is an inclined surface, and the right end face of the second cylinder 402 is designed as an inclined surface so that the right end of the second cylinder 402 forms a small diameter end, which facilitates the right end of the second cylinder 402 to be guided and inserted into the mounting hole.
[0037] like Figure 1 As shown, in this embodiment, preferably, the connection between the right end of the first cylinder 401 and the left end of the second cylinder 402 is rounded.
[0038] like Figure 1 As shown, in this embodiment, preferably, the first cylinder 401, the second cylinder 402, and the frustum 403 are integrally formed by steel casting, and the integrally formed design can further improve the quality reliability of the entire tooling.
[0039] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. An oil seal guide fixture for assembling a motor shaft of a permanent magnet synchronous motor, characterized in that: It includes a first cylindrical body (401), a second cylindrical body (402), and a frustum (403); The left end of the first cylindrical body (401) is fixedly connected to the large diameter end of the truncated cone body (403), the diameter of the first cylindrical body (401) is equal to the diameter of the large diameter end of the truncated cone body (403), and the diameter of the first cylindrical body (401) matches the outer diameter of the left end surface of the motor shaft (7); The right end of the first cylinder (401) is fixedly connected to the left end of the second cylinder (402); the diameter of the second cylinder (402) is smaller than the diameter of the first cylinder (401); the diameter of the second cylinder (402) is matched to the inner diameter of the mounting hole provided at the left end of the motor shaft (7); the second cylinder (402) is located in the mounting hole and the right end face of the second cylinder (402) is in contact with the left end face of the motor shaft (7); A light hole (404) is provided at the center of the right end face of the second cylinder (402), and the light hole (404) extends along the circumferential direction of the second cylinder (402) to the left end face of the first cylinder (401); a threaded hole (405) is provided on the left end face of the truncated cone (403) and is interconnected with the light hole (404), and the threaded hole (405) is used to fix the entire guide fixture to the motor shaft (7) by means of bolts.
2. The oil seal guide fixture for assembling the motor shaft of a permanent magnet synchronous motor according to claim 1, characterized in that: The central axes of the first cylinder (401), the second cylinder (402) and the frustum (403) coincide with each other.
3. The oil seal guide fixture for assembling the motor shaft of a permanent magnet synchronous motor according to claim 1, characterized in that: The second cylinder (402) and the motor shaft (7) are connected via an inner shaft spline and their central axes coincide with each other.
4. The oil seal guide fixture for assembling the motor shaft of a permanent magnet synchronous motor according to claim 1, characterized in that: The end surface of the small diameter end of the truncated cone (403) is rounded.
5. The oil seal guide fixture for assembling the motor shaft of a permanent magnet synchronous motor according to claim 1, characterized in that: The connection between the left end of the first cylindrical body (401) and the large diameter end of the truncated cone body (403) is rounded.
6. The oil seal guide fixture for assembling the motor shaft of a permanent magnet synchronous motor according to claim 1, characterized in that: The right end surface of the second cylinder (402) is an inclined surface.
7. The oil seal guide fixture for assembling the motor shaft of a permanent magnet synchronous motor according to claim 1, characterized in that: The connection between the right end of the first cylinder (401) and the left end of the second cylinder (402) is rounded.
8. The oil seal guide fixture for assembling the motor shaft of a permanent magnet synchronous motor according to claim 1, characterized in that: The first cylindrical body (401), the second cylindrical body (402), and the frustum (403) are integrally formed by steel casting.