Motor stator and motor
Patent Information
- Application Number
- CN202522528938.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-28
AI Technical Summary
During the assembly of the motor stator, the temperature sensor may be displaced due to external forces, which will reduce the accuracy of the stator winding temperature monitoring and affect the motor's overheat protection function.
A wire harness retainer, including radial and axial retaining grooves, is designed with an L-shaped bending structure to fix the temperature sensor and prevent it from shifting during assembly.
This effectively prevents the temperature sensor from shifting during the motor stator assembly process, ensuring temperature monitoring accuracy and improving the motor's operational reliability and service life.
Smart Images
Figure CN224935523U_ABST
Abstract
Description
Technical Field
[0001] This application relates to an electric motor stator and an electric motor. Background Technology
[0002] Temperature sensors are typically installed at designated locations in the stator windings of a motor to collect temperature information of the stator windings in real time. This provides overheat protection for the motor during operation, improves the reliability of motor operation, and extends the service life of the motor.
[0003] However, during the assembly of the motor stator, the temperature sensor may be displaced due to external forces, thus deviating from its designated position. This will affect the accuracy of temperature monitoring of the stator windings, and consequently affect the motor's overheat protection function. Utility Model Content
[0004] This application was made in response to the deficiencies of the prior art. One objective of this application is to provide a motor stator that prevents the temperature sensor from shifting during the assembly process of the motor stator. Another objective of this application is to provide a motor.
[0005] To achieve the above objectives, the present application may adopt the following technical solutions.
[0006] An embodiment of this application provides a motor stator, comprising:
[0007] Stator core;
[0008] Stator windings are wound around the stator core with an insulating element in between;
[0009] A temperature sensor, fixed to the stator winding, is used to measure the temperature of the stator winding;
[0010] A wiring harness that connects the temperature sensor to the controller; and
[0011] A wire harness retainer is disposed axially on the stator core near one end of the stator core, holding the wire harness in place.
[0012] The wire harness retainer has: a radial retaining groove extending radially along the motor stator to retain the wire harness passing through the radial retaining groove; and an axial retaining groove extending axially to retain the wire harness passing through the axial retaining groove, the axial retaining groove being located radially outward from the radial retaining groove and on the axial side of the radial retaining groove, the wire harness bending in an L-shape after passing through the radial retaining groove and passing through the axial retaining groove.
[0013] In one alternative embodiment, the motor stator further includes a stator support that surrounds the stator core radially outward.
[0014] The wire harness retainer has: a first mating surface facing radially inward and abutting against the outer surface of the vertical wall of the insulator; and a second mating surface facing radially outward, located radially outward from the first mating surface, and abutting against the inner surface of the stator support.
[0015] In another alternative embodiment, both the first mating surface and the outer surface of the vertical wall are formed as inclined surfaces that are radially inward toward one side of the axial direction.
[0016] In another alternative embodiment, a protrusion is provided on the second mating surface that protrudes radially outward, and a recess is provided on the inner surface of the stator support for the protrusion to be inserted.
[0017] In another alternative embodiment, a fitting groove is provided on the radially inner side of the first mating surface. The fitting groove is located on the back side of the radial retaining groove in the axial direction, extends circumferentially along the motor stator and opens toward the other side in the axial direction. The end of the vertical wall on the axial side is fitted into the fitting groove.
[0018] In another alternative embodiment, the motor stator further includes a stator bracket that blocks the end opening on the axial side of the stator support.
[0019] The wire harness retainer is held in the axial direction by the stator bracket and the vertical wall.
[0020] In another alternative embodiment, a clearance recess is formed between the radial retaining groove and the axial retaining groove, recessed toward the other side of the axial direction.
[0021] In another alternative embodiment, the radial retaining groove has a C-shaped cross-section that opens towards the axial side, and the opening width is smaller than the width of the bottom of the radial retaining groove.
[0022] The cross-section of the axial retaining groove is C-shaped with an opening towards the radial inward side, and the opening width is smaller than the width of the bottom of the axial retaining groove.
[0023] In another alternative embodiment, the portion forming the radial retaining groove constitutes part of the radial inner surface of the wire harness retainer, and the portion forming the axial retaining groove constitutes part of the radial outer surface of the wire harness retainer.
[0024] An embodiment of this application also provides an electric motor, including the motor stator of the above-described scheme.
[0025] By adopting the above technical solution, it is possible to prevent the temperature sensor from shifting during the assembly process of the motor stator. Attached Figure Description
[0026] Figure 1 This is a cross-sectional schematic diagram showing an embodiment of an electric motor stator according to the present application.
[0027] Figure 2 It shows Figure 1 A magnified cross-sectional view of the portion enclosed by the dashed box.
[0028] Figure 3 It shows Figure 1 A three-dimensional schematic diagram of the wire harness retainer included in the motor stator.
[0029] Figure 4 The comparison example shows the stator of the motor. Figure 2 A magnified sectional view of the corresponding part.
[0030] Figure 5 It shows Figure 4 A three-dimensional schematic diagram of the wire harness retainer included in the motor stator.
[0031] Explanation of reference numerals in the attached figures
[0032] 1. Motor stator;
[0033] 11 Stator core; 12 Stator winding; 13 Insulator; 131 Vertical wall; 14 Temperature sensor; 15 Wiring harness; 16 Controller; 17 Stator carrier; 171 Recess; 18 Stator bracket;
[0034] 30 Wire harness retainer; 31 Radial retaining groove; 32 Axial retaining groove; 33 First mating surface; 34 Second mating surface; 35 Protrusion; 36 Fitting groove; 37 Recess;
[0035] 30' Wire harness retainer; 31' Axial retaining groove; 32' First radial guide groove; 33' Second radial guide groove; 34' Axial guide groove;
[0036] A: Axial; R: Radial Detailed Implementation
[0037] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that these specific descriptions are only for teaching those skilled in the art how to implement this application, and are not intended to exhaustively describe all possible methods of this application, nor to limit the scope of this application.
[0038] In this application, unless otherwise specified, "axial," "radial," and "circumferential" refer to the axial, radial, and circumferential directions of the motor stator, respectively. "Axial" corresponds to... Figure 1 , Figure 2 The vertical direction in the middle, "one side of the axis" corresponds to Figure 1 , Figure 2 The upper side of the middle, "the other side of the axis" corresponds to Figure 1 , Figure 2 The lower side of the middle. Furthermore, "radial" corresponds to... Figure 2 In the left and right directions, "radial inner side" corresponds to Figure 2 The left side of the text, "radial outer" corresponds to Figure 2 On the right side of the middle.
[0039] The following description, in conjunction with the accompanying drawings, describes an embodiment of the motor stator of this application.
[0040] like Figure 1 , Figure 2 As shown, a motor stator 1 according to an embodiment of this application includes: a stator core 11; a stator winding 12 wound around the stator core 11 (or, wound around the teeth of the stator core 11) with an insulating member 13; a temperature sensor 14, such as a negative temperature coefficient thermistor (NTC), fixed to the stator winding 12 by means of an adhesive or potting, for measuring the temperature of the stator winding 12; a wiring harness 15 connecting the temperature sensor 14 to a controller 16, thereby providing power from the controller 16 to the temperature sensor 14 and transmitting the detection result of the temperature sensor 14 to the controller 16; and a wiring harness retainer 30 disposed near the end of the stator core 11 on one axial side along the axial direction A of the motor stator 1, for retaining the wiring harness 15.
[0041] like Figure 3 As shown, the wire harness retainer 30 is made of a material such as insulating resin by injection molding, and has: a radial retaining groove 31 extending radially R along the motor stator 1 to retain the wire harness 15 passing through the radial retaining groove 31; and an axial retaining groove 32 extending axially A along the motor stator 1 to retain the wire harness 15 passing through the axial retaining groove 32, wherein the axial retaining groove 32 is located radially outward from the radial retaining groove 31 and axially to the side of the radial retaining groove 31. Figure 2 It can be seen that after the wire harness 15 passes through the radial retaining groove 31, it bends in an L-shape and passes through the axial retaining groove 32.
[0042] It should be noted that "the axial retaining groove 32 is located radially outward from the radial retaining groove 31" means that at least a portion of the axial retaining groove 32 is located radially outward from the entire radial retaining groove 31. Similarly, "the axial retaining groove 32 is located axially to the side from the radial retaining groove 31" means that at least a portion of the axial retaining groove 32 is located axially to the side from the entire radial retaining groove 31.
[0043] By passing the wire harness 15 through the radial retaining groove 31 and the axial retaining groove 32 and bending it in an L-shape between them, it is ensured that the wire harness 15 and the temperature sensor 14 connected thereto do not shift in position when subjected to a certain external force. This prevents the temperature sensor 14 from shifting during the assembly process of the motor stator 1, specifically from the time the wire harness 15 and the temperature sensor 14 are installed until the temperature sensor 14 is fixed to the stator winding 12 using materials such as adhesives or potting.
[0044] In addition, such as Figure 3 As shown, the radial retaining groove 31 has a C-shaped cross-section that opens towards the axial side, and the opening width is smaller than the width of the bottom of the radial retaining groove 31. Similarly, the axial retaining groove 32 has a C-shaped cross-section that opens towards the radially inward side, and the opening width is smaller than the width of the bottom of the axial retaining groove 32. This allows the wire harness 15 to be installed into the radial retaining groove 31 and the axial retaining groove 32 through the narrower openings, and prevents the wire harness 15 from detaching from the radial retaining groove 31 and the axial retaining groove 32.
[0045] In addition, such as Figure 2 , Figure 3 As shown, a recessed clearance 37 is formed between the radial retaining groove 31 and the axial retaining groove 32, recessed towards the other side of the axial direction. This recessed clearance 37 makes it easier for the wire harness 15 to bend in an L-shape between the radial retaining groove 31 and the axial retaining groove 32, preventing interference between the corner of the wire harness retainer 30 and the bent portion of the wire harness 15.
[0046] In addition, such as Figure 1 , Figure 2 As shown, the motor stator 1 also includes a stator support 17, which is, for example, generally cylindrical and has a flange portion that protrudes radially inward on the other side of the axial direction. The stator support 17 surrounds the stator core 11 from the radial outside, thereby forming the outer contour of the motor stator 1.
[0047] In addition, such as Figure 2 , Figure 3As shown, the wire harness retainer 30 further comprises: a first mating surface 33 facing radially inward and abutting against the outer surface of the vertical wall 131 of the insulator 13; and a second mating surface 34 facing radially outward, located radially outward than the first mating surface 33, and abutting against the inner surface of the stator support 17. Thus, by using the vertical wall 131 of the insulator 13 and the stator support 17 to radially clamp the wire harness retainer 30, displacement of the wire harness retainer 30 can be prevented during the assembly of the motor stator 1, thereby helping to prevent displacement of the temperature sensor 14.
[0048] Moreover, such as Figure 2 , Figure 3 As shown, both the first mating surface 33 and the outer surface of the vertical wall 131 are formed as inclined surfaces that slope radially inward toward one side of the axial direction. This facilitates the insertion of the wire harness retainer 30 between the vertical wall 131 of the insulator 13 and the stator support 17.
[0049] In addition, such as Figure 3 As shown, a fitting groove 36 is provided on the radially inner side of the first mating surface 33. The fitting groove 36 is located on the back side of the radial retaining groove 31 in the axial direction A, extends along the circumference of the motor stator 1, and opens towards the other side in the axial direction. It should be noted that "the fitting groove 36 extends along the circumference of the motor stator 1" includes cases where the fitting groove 36 extends in a curved or straight (including approximately straight) manner in the circumference of the motor stator 1. Figure 2 It can be seen that the end of the vertical wall 131 on one axial side is fitted into the fitting groove 36. This facilitates the installation of the wire harness retainer 30 between the vertical wall 131 of the insulating member 13 and the stator bracket 17.
[0050] In addition, such as Figure 2 , Figure 3 As shown, a protrusion 35 protruding radially outward is provided on the second mating surface 34. This protrusion 35 extends linearly in the circumferential direction of the motor stator 1, for example, located on the back side of the axial retaining groove 32 in the radial direction R, and on the opposite side of the axial retaining groove 32 in the axial direction A. Furthermore, a recess 171 for inserting the protrusion 35 is provided on the inner surface of the stator support 17, and the recess 171 is formed in a shape corresponding to the protrusion 35. Thus, when the wire harness retainer 30 is clamped between the vertical wall 131 of the insulating member 13 and the stator support 17, the recess 171 and the protrusion 35 are used to more effectively limit the displacement of the wire harness retainer 30 in the axial direction A.
[0051] In addition, such as Figure 1 , Figure 2As shown, the motor stator 1 also includes a stator bracket 18, which blocks the end opening on one axial side of the stator support 17. Furthermore, the wire harness retainer 30 is held in the axial direction A by the stator bracket 18 and the vertical wall 131. More specifically, the surface on the other axial side of the stator bracket 18 and the end of the vertical wall 131 on one axial side clamp the portion of the wire harness retainer 30 corresponding to the radial retaining groove 31 in the axial direction A. This further facilitates limiting the displacement of the wire harness retainer 30 in the axial direction A.
[0052] like Figure 3 As shown, the portion forming the radial retaining groove 31 constitutes part of the radial inner surface of the wire harness retainer 30, and the portion forming the axial retaining groove 32 constitutes part of the radial outer surface of the wire harness retainer 30. Thus, the overall radial dimension of the wire harness retainer 30 is relatively small.
[0053] To further illustrate the superior effects of a motor stator according to an embodiment of this application, the following is based on... Figure 4 , Figure 5 This section describes the motor stator of the comparative example and its included wiring harness retainer 30'. Figure 4 , Figure 5 In this document, the same reference numerals are used to refer to the same structure as the motor stator in one embodiment of this application described above, and specific descriptions are omitted.
[0054] like Figure 4 , Figure 5 As shown, the motor stator of this comparative example includes a wire harness retainer 30', which has an axial retaining groove 31', a first radial guide groove 32', a second radial guide groove 33', and an axial guide groove 34' arranged sequentially from the radially inner side to the radially outer side. The axial retaining groove 31' is C-shaped and opens towards one circumferential side, retaining the wire harness 15 passing through it. Furthermore, the first radial guide groove 32', the second radial guide groove 33', and the axial guide groove 34' are only used to guide the wire harness 15 and do not retain it.
[0055] One embodiment of the present application's motor stator and its included wire harness retainer 30, by having the wire harness 15 pass through a radial retaining groove 31 and an axial retaining groove 32 that hold the wire harness 15 and bend it in an L-shape between them, can better prevent the temperature sensor 14 from shifting compared to the structure of the wire harness retainer 30' in the comparative example, which only uses the axial retaining groove 31' to hold the wire harness 15. Furthermore, since it eliminates the need for multiple guide grooves 32', 33', and 34', the wire harness retainer 30 of the present application can reduce its radial dimension by more than 50% compared to the wire harness retainer 30' in the comparative example. This avoids obstruction of the flow of cooling oil cooling the stator windings due to excessive overlap between the wire harness retainer and the stator windings when viewed axially. Moreover, reducing the radial dimension of the wire harness retainer also helps to reduce manufacturing costs.
[0056] An embodiment of this application also provides a motor including the above-described motor stator.
[0057] The specific technical solutions of this application have been described in detail above. However, this application is not limited to the above technical solutions, and various modifications that can be conceived by those skilled in the art are of course included within the scope of this application. Examples are given below.
[0058] I. In one embodiment of the motor stator of this application, an example is described with a structure in which a relief recess 37 is formed between the radial retaining groove 31 and the axial retaining groove 32. However, the relief recess 37 may not be provided.
[0059] II. In one embodiment of the motor stator of this application, the structure in which both the first mating surface 33 and the outer surface of the vertical wall 131 are formed as inclined surfaces is described as an example, but it is not limited to this. The outer surfaces of both the first mating surface 33 and the vertical wall 131 may also be formed as planes parallel to the axial direction.
[0060] III. In one embodiment of the motor stator of this application, a structure is described as having a protrusion 35 on the second mating surface 34 and a recess 171 for the protrusion 35 to be inserted on the inner surface of the stator support 17. However, it is not limited to this. The protrusion may be provided on the inner surface of the stator support 17 and the recess for the protrusion to be inserted may be provided on the second mating surface 34. Alternatively, the protrusion and the recess may not be provided.
Claims
1. A motor stator, characterized in that, include: Stator core; Stator windings are wound around the stator core with an insulating element in between; A temperature sensor, fixed to the stator winding, is used to measure the temperature of the stator winding; A wiring harness that connects the temperature sensor to the controller; and A wire harness retainer is disposed axially on the stator core near one end of the stator core, holding the wire harness in the axial direction. The wire harness retainer has: a radial retaining groove extending radially along the motor stator to retain the wire harness passing through the radial retaining groove; and an axial retaining groove extending axially to retain the wire harness passing through the axial retaining groove, the axial retaining groove being located radially outward from the radial retaining groove and on the axial side of the radial retaining groove, the wire harness bending in an L-shape after passing through the radial retaining groove and passing through the axial retaining groove.
2. The motor stator according to claim 1, characterized in that, It also includes a stator support that surrounds the stator core radially outward. The wire harness retainer has a first mating surface that faces radially inward and abuts against the outer surface of the upright wall of the insulator. And a second mating surface, which faces radially outward, is located radially outward than the first mating surface, and abuts against the inner surface of the stator support.
3. The motor stator according to claim 2, characterized in that, Both the first mating surface and the outer surface of the vertical wall are formed as inclined surfaces that are radially inward toward the axial side.
4. The motor stator according to claim 2, characterized in that, The second mating surface has a protrusion that protrudes radially outward, and the inner surface of the stator support has a recess for the protrusion to be inserted.
5. The motor stator according to claim 2, characterized in that, A fitting groove is provided on the radial inner side of the first mating surface. The fitting groove is located on the back side of the radial retaining groove in the axial direction, extends along the circumference of the motor stator and opens toward the other side of the axial direction. The end of the vertical wall on the axial side is fitted into the fitting groove.
6. The motor stator according to claim 2, characterized in that, It also includes a stator bracket that blocks the end opening on the axial side of the stator support. The wire harness retainer is held in the axial direction by the stator bracket and the vertical wall.
7. The motor stator according to any one of claims 1 to 6, characterized in that, A clearance recess is formed between the radial retaining groove and the axial retaining groove, recessed toward the other side of the axial direction.
8. The motor stator according to any one of claims 1 to 6, characterized in that, The radial retaining groove has a C-shaped cross-section that opens towards one side of the axial direction, and the opening width is smaller than the width of the bottom of the radial retaining groove. The cross-section of the axial retaining groove is C-shaped with an opening towards the radial inward side, and the opening width is smaller than the width of the bottom of the axial retaining groove.
9. The motor stator according to any one of claims 1 to 6, characterized in that, The portion forming the radial retaining groove constitutes part of the radial inner surface of the wire harness retainer, and the portion forming the axial retaining groove constitutes part of the radial outer surface of the wire harness retainer.
10. An electric motor, characterized in that, The motor stator includes any one of claims 1 to 9.