Motor end shield and motor having the same

Abstract

The application provides a motor end cover and a motor with the same, and the motor end cover comprises an end cover shell (10), a bearing hole is formed in the end cover shell (10), a mounting groove (11) is arranged on the side wall of the first end of the bearing hole, the mounting groove (11) is used for mounting a sensor, a bushing (20) is arranged at the second end of the bearing hole, and the bushing (20) is used for mounting a bearing. The technical scheme of the application effectively solves the problem of low motor control precision caused by unreasonable structural arrangement of the motor end cover in the prior art.

Description

Technical Field

[0001] This invention relates to the field of motor equipment technology, and more specifically, to a motor end cover and a motor having the same. Background Technology

[0002] The bearing bushings of existing motor end covers are mostly fixed to the motor end cover with bolts, which makes the assembly of bearing bushings complicated. At the same time, the bearing bushings and the position sensor mounting slots are distributed on both sides of the motor end cover. It is difficult to improve the coaxiality of the bearing bushing axis and the position sensor axis after assembly during machining, which affects the resolver control accuracy of the motor assembly and thus affects the precise control of the motor.

[0003] The structural design of the motor end cover in the existing technology is unreasonable, which usually leads to the unreasonable use of space at the end of the stator inside the motor, resulting in a large axial dimension of the motor.

[0004] There is currently no effective solution to the aforementioned problems in the existing technology. Summary of the Invention

[0005] The main objective of this invention is to provide a motor end cover and a motor having the same, so as to at least solve the problem of low motor control accuracy caused by unreasonable motor end cover structure in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, a motor end cover is provided, comprising: an end cover housing, a bearing hole provided on the end cover housing, a mounting groove provided on the side wall of the first end of the bearing hole for mounting a sensor, and a bushing provided at the second end of the bearing hole for mounting a bearing.

[0007] Furthermore, a first annular boss is provided on the bottom end face of the end cap housing, a bearing hole is formed on the inner circumferential surface of the first annular boss, an installation groove is provided on the side wall of the end of the first annular boss away from the end cap housing, and a bushing is provided on the end of the first annular boss close to the end cap housing.

[0008] Furthermore, the end cap housing has a second annular boss, which extends along the outer peripheral surface of the first annular boss. The inner peripheral surface of the second annular boss and the outer peripheral surface of the first annular boss are spaced apart. A plurality of reinforcing ribs are provided between the inner peripheral surface of the second annular boss and the outer peripheral surface of the first annular boss. The first end of the reinforcing rib is connected to the outer peripheral surface of the first annular boss, and the second end of the reinforcing rib is connected to the inner peripheral surface of the second annular boss. A receiving cavity is formed between adjacent reinforcing ribs, and the receiving cavity is used to receive the stator winding of the motor.

[0009] Furthermore, the height of the top surface of the end cap housing is set to gradually decrease from the middle of the end cap housing to the outer peripheral edge of the end cap housing.

[0010] Furthermore, the bushing has a limiting structure, which includes multiple tangents. These multiple tangents are evenly arranged on the outer surface of the bushing. The axial height of the tangents is L1, and the axial height of the bushing is L2, wherein 1 / 3*L2≤L1≤2 / 3*L2.

[0011] Furthermore, the side wall of the mounting groove is provided with a positioning stop in the circumferential direction, and at least one bolt mounting boss is provided on the inner side of the positioning stop. A mounting groove bolt is provided in the bolt mounting boss, and the mounting groove bolt is used to lock the sensor in the mounting groove.

[0012] Furthermore, the bottom surface of the second annular boss is flat, and the bottom surface of the second annular boss is provided with two locating pin holes, which are symmetrically arranged along the central axis of the bushing.

[0013] Furthermore, the bushing and the end cap housing are integrally formed.

[0014] Furthermore, the end cap housing includes a mounting boss for mounting a drive shaft bracket, a bearing mounting hole in the center of the mounting boss, and multiple threaded holes.

[0015] According to one aspect of the present invention, an electric motor is provided, including an electric motor end cover, wherein the electric motor end cover is the electric motor end cover described above.

[0016] The technical solution of this invention includes a motor end cover housing with a bearing hole. A mounting groove for mounting a sensor is provided on the side wall of the first end of the bearing hole, and a bushing for mounting the bearing is provided at the second end of the bearing hole. Machining can be performed using a single machining reference, achieving integrated installation of the bearing and sensor. This improves the coaxiality of the bearing axis and the sensor axis after assembly, and enhances the precise control performance of the motor by influencing the resolver control accuracy of the motor assembly. The technical solution of this application effectively solves the problem of low motor control accuracy caused by an unreasonable motor end cover structure in the prior art. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a first embodiment of the motor end cover according to the present invention is shown;

[0019] Figure 2 A schematic diagram of the structure of a second embodiment of the motor end cover according to the present invention is shown;

[0020] Figure 3 A schematic diagram of an embodiment of the bushing of the motor end cover according to the present invention is shown;

[0021] Figure 4 A schematic diagram of the structure of a third embodiment of the motor end cover according to the present invention is shown;

[0022] Figure 5 A schematic diagram of the structure of a fourth embodiment of the motor end cover according to the present invention is shown;

[0023] Figure 6 A structural schematic diagram of a fifth embodiment of the motor end cap according to the present invention is shown.

[0024] The above figures include the following reference numerals:

[0025] 10. End cap housing; 11. Mounting groove; 111. Positioning stop; 112. Bolt mounting boss; 113. Mounting groove bolt; 12. First annular boss; 13. Second annular boss; 131. Positioning pin hole; 14. Reinforcing rib; 15. Mounting boss; 151. Bearing mounting hole; 152. Threaded hole; 153. Bolt hole;

[0026] 20. Bushing; 21. Trimmed edge;

[0027] 30. Receiving cavity;

[0028] 100. Motor housing; 200. End cover plate; 300. Motor body; 400. Fixing ear plate; 401. Wire harness fixing hole; 402. Buckle fixing hole; 403. First groove; 500. Second groove; 501. Motor controller fixing point. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0033] Combination Figures 1 to 6 As shown, according to a specific embodiment of this application, a motor end cover is provided.

[0034] The motor end cover includes an end cover housing 10. A bearing hole is provided on the end cover housing 10. A mounting groove 11 is provided on the side wall of the first end of the bearing hole. The mounting groove 11 is used to mount a sensor, and a bushing 20 is provided at the second end of the bearing hole for mounting a bearing.

[0035] By applying the technical solution of this application, the motor end cover includes an end cover housing 10, on which a bearing hole is provided. By providing a mounting groove 11 for mounting a sensor on the side wall of the first end of the bearing hole, and a bushing 20 for mounting the bearing on the second end of the bearing hole, machining can be performed under a single machining reference. This achieves the integrated installation of the bearing and the sensor, thereby improving the coaxiality of the bearing axis and the axis after the sensor assembly. It also achieves the technical effect of improving the precise control performance of the motor by influencing the resolver control accuracy of the motor assembly. By adopting the technical solution of this application, the problem of low motor control accuracy caused by unreasonable motor end cover structure in the prior art is effectively solved.

[0036] like Figure 2As shown, a first annular boss 12 is provided on the bottom end face of the end cap housing 10. A bearing hole is formed on the inner circumferential surface of the first annular boss 12. A mounting groove 11 is provided on the side wall of the end of the first annular boss 12 away from the end cap housing 10. A bushing 20 is provided at the end of the first annular boss 12 near the end cap housing 10. With the technical solution of this embodiment, the first annular boss 12 extends along the axial direction of the end cap housing 10. The mounting groove 11 structure and the bushing 20 are provided in the first annular boss 12, so that the overall strength of the end cap housing 10 is not affected and the assembly of the sensor and bearing is convenient.

[0037] Specifically, the end cap housing 10 has a second annular boss 13. The second annular boss 13 extends along the outer peripheral surface of the first annular boss 12. The inner peripheral surface of the second annular boss 13 and the outer peripheral surface of the first annular boss 12 are spaced apart. A plurality of reinforcing ribs 14 are provided between the inner peripheral surface of the second annular boss 13 and the outer peripheral surface of the first annular boss 12. The first end of the reinforcing rib 14 is connected to the outer peripheral surface of the first annular boss 12. The second end of the reinforcing rib 14 is connected to the inner peripheral surface of the second annular boss 13. A receiving cavity 30 is formed between adjacent reinforcing ribs 14, and the receiving cavity 30 is used to receive the stator winding of the motor. In the technical solution of this embodiment, the second annular boss 13 is located outside the first annular boss 12. By spaced apart between the inner peripheral surface of the second annular boss 13 and the outer peripheral surface of the first annular boss 12, various forms of reinforcing structures can be provided between the inner peripheral surface of the second annular boss 13 and the outer peripheral surface of the first annular boss 12. The reinforcing structures include, but are not limited to, reinforcing ribs and connecting trusses. The inclusion cavity 30 can make full use of the internal space of the end cover housing 10, thereby reducing the axial height of the motor, improving the versatility of the motor, and making the motor easier to transport.

[0038] In an optional embodiment, the mounting groove 11 and the bushing 20 are located on the same side of the end cover housing 10. Radial reinforcing ribs 14 are arranged outside the mounting groove 11. A second annular boss 13, which mates with the motor housing, is arranged on the outer edge of the end cover housing 10 on the same side as the bushing 20. The radial reinforcing ribs 14 connect the bushing 20 and the second annular boss 13, improving the structural strength of the motor end cover. Optionally, the interior of the second annular boss 13 undergoes weight reduction treatment.

[0039] Furthermore, the height of the top surface of the end cover housing 10 gradually decreases from the middle of the end cover housing 10 to its outer peripheral edge. This configuration creates a flared structure for the end cover housing 10, which, while ensuring the structural strength of the end cover housing 10, maximizes the use of the space at the stator end of the motor to arrange the position sensor and the receiving cavity 30. By providing radial reinforcing ribs 14 inside the end cover housing 10, the axial dimension of the motor is reduced while maintaining structural strength. It should be noted that in the technical solution of this embodiment, the reinforcing ribs 14 are formed inside the end cover housing 10, avoiding the uneven stress on the reinforcing ribs 14 caused by excessive inclination of the reinforcing ribs when the bearing and the sensor are located on different sides of the end cover housing 10, as is the case in the prior art.

[0040] Furthermore, the bushing 20 has a limiting structure. The limiting structure includes a tangent 21. Multiple tangents 21 are evenly distributed on the outer surface of the bushing 20. The axial height of the tangent 21 is L1, and the axial height of the bushing 20 is L2, where 1 / 3*L2≤L1≤2 / 3*L2. The bottom of the tangent 21 is a plane, which prevents the bushing 20 from rotating along its axis, and the sidewall of the tangent 21 prevents axial transmission of the bushing 20, thus achieving the purpose of limiting and preventing rotation.

[0041] like Figure 4 As shown, a positioning stop 111 is provided circumferentially on the side wall of the mounting groove 11. At least one bolt mounting boss 112 is provided on the inner side of the positioning stop 111. A mounting slot bolt 113 is provided in the bolt mounting boss 112. The mounting slot bolt 113 is used to lock the sensor in the mounting groove 11.

[0042] like Figure 2 As shown, the bottom surface of the second annular boss 13 is flat. Two locating pin holes 131 are provided on the bottom surface of the second annular boss 13. The two locating pin holes 131 are symmetrically arranged along the central axis of the bushing 20.

[0043] Specifically, the bushing 20 is integrally formed with the end cap housing 10. The bushing 20 is integrally cast with the end cap housing 10 by insert die casting. Optionally, the process is as follows: first, the bushing 20 is manufactured, then the bushing 20 is placed in a preset position as a mold, and finally the end cap housing 10 is cast in cooperation with multiple molds and the bushing 20.

[0044] like Figure 5 As shown, the end cap housing 10 includes a mounting boss 15. The mounting boss 15 is used to mount the drive shaft bracket, and a bearing mounting hole 151 is provided in the center of the mounting boss 15. The mounting boss 15 is provided with a plurality of threaded holes 152. There are two threaded holes 152, which are symmetrically arranged along the axis of the bearing mounting hole 151. The mounting boss 15 is also provided with bolt holes 153.

[0045] In an alternative embodiment, mounting slot 11 is used to mount a position sensor.

[0046] Furthermore, the end cap housing 10 is provided with a fixing ear plate 400 on the upper part of the mounting groove 11. The fixing ear plate 400 is used to install the wire harness bracket. The fixing ear plate 400 is provided with an elongated snap-fit ​​fixing hole 402 and a circular opening wire harness fixing hole 401. The position sensor wire harness can be fixed in the wire harness fixing hole 401, and the connector can be fixed in the snap-fit ​​fixing hole 402.

[0047] Furthermore, a first groove 403 is provided at the end of the motor end cover away from the motor housing 100. The first groove 403 is used to place a sealing ring and seal it with the end cover plate 200. A second groove 500 is provided at the three-phase line outlet of the motor end cover. The second groove 500 is used to place a sealing ring and seal it with the hand component.

[0048] According to one aspect of the present invention, an electric motor is provided, including a motor end cover, which is the motor end cover described in the above embodiment. A motor body 300 is mounted within a motor housing 100, and the motor body 300 is mounted at a port of the motor housing 100. The mating surfaces of the motor end cover and the motor housing 100 are sealed with adhesive and positioned using two locating pins. Figure 6 As shown, the motor end cover also includes two motor controller fixing points 501.

[0049] In an optional embodiment, the motor end cover includes an end cover housing 10. Inside the end cover housing 10, along the axial direction, are sequentially arranged a mounting groove 11 for mounting a position sensor and a bushing 20 for mounting a bearing. The bushing 20 and the mounting groove 11 for the position sensor are arranged on the same side. The outer edge of the end cover housing 10 is provided with a bearing mounting hole 151 for fixing a drive shaft bracket, a mounting boss 15 for fixing a motor controller, mounting holes for AC busbar connection, and a fixing lug 400 for mounting the position sensor wiring harness and connector. The motor end cover provided in this embodiment, by providing the bushing 20 and the mounting groove 11 for the position sensor, achieves integrated mounting of the bearing and position sensor. Simultaneously, due to the provided drive shaft bracket mounting structure and the motor controller fixing boss, the motor can integrate the function of the motor controller, shortening the axial dimension of the motor and reducing the axial dimension of the electric drive system, which is beneficial for reducing the overall weight of the motor and improving its versatility. By setting the bushing 20 and the mounting groove 11 on the same side of the motor end cover, they can be machined under the same machining reference. After assembling the position sensor, the coaxiality accuracy of the bearing axis and the sensor axis is high, which can improve the precise control capability of the motor.

[0050] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0051] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0052] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A motor end cover, characterized in that, include: The end cap housing (10) has a bearing hole, and a mounting groove (11) is provided on the side wall of the first end of the bearing hole. The mounting groove (11) is used to install the sensor. A bushing (20) is provided at the second end of the bearing hole. The bushing (20) is used to install the bearing. The bottom end face of the end cap housing (10) is provided with a first annular boss (12), the inner circumferential surface of the first annular boss (12) forms the bearing hole, the side wall of the first annular boss (12) away from the end cap housing (10) is provided with the mounting groove (11), and the bushing (20) is provided at the end of the first annular boss (12) close to the end cap housing (10). The end cap housing (10) has a second annular boss (13), which extends along the outer peripheral surface of the first annular boss (12). The inner peripheral surface of the second annular boss (13) and the outer peripheral surface of the first annular boss (12) are spaced apart. A plurality of reinforcing ribs (14) are provided between the inner peripheral surface of the second annular boss (13) and the outer peripheral surface of the first annular boss (12). The first end of the reinforcing rib (14) is connected to the outer peripheral surface of the first annular boss (12), and the second end of the reinforcing rib (14) is connected to the inner peripheral surface of the second annular boss (13). A receiving cavity (30) is formed between adjacent reinforcing ribs (14), and the receiving cavity (30) is used to receive the stator winding of the motor. The mounting groove (11) has a positioning stop (111) circumferentially arranged on the side wall. At least one bolt mounting boss (112) is provided on the inner side of the positioning stop (111). A mounting groove bolt (113) is provided in the bolt mounting boss (112). The mounting groove bolt (113) is used to lock the sensor in the mounting groove (11). The mounting groove (11) and the bushing (20) are located on the same side of the end cover housing (10). Radial reinforcing ribs (14) are arranged outside the mounting groove (11). A second annular boss (13) that mates with the motor housing is arranged on the same side of the outer edge of the end cover housing (10) and the bushing (20). The radial reinforcing ribs connect the bushing (20) and the second annular boss (13).

2. The motor end cover according to claim 1, characterized in that, The height of the top surface of the end cap housing (10) is set to gradually decrease from the middle of the end cap housing (10) to the outer peripheral edge of the end cap housing (10).

3. The motor end cover according to claim 1, characterized in that, The bushing (20) has a limiting structure, which includes a slit (21). There are multiple slits (21), and the multiple slits (21) are evenly arranged on the outer surface of the bushing (20). The axial height of the slit (21) is L1, and the axial height of the bushing (20) is L2, wherein 1 / 3*L2≤L1≤2 / 3*L2.

4. The motor end cover according to claim 1, characterized in that, The bottom surface of the second annular boss (13) is flat, and the bottom surface of the second annular boss (13) is provided with two positioning pin holes (131). The two positioning pin holes (131) are symmetrically arranged along the central axis of the bushing (20).

5. The motor end cover according to claim 1, characterized in that, The bushing (20) is integrally formed with the end cap housing (10).

6. The motor end cover according to claim 1, characterized in that, The end cap housing (10) includes a mounting boss (15) for mounting a drive shaft bracket. The mounting boss (15) has a bearing mounting hole (151) in the middle and multiple threaded holes (152).

7. An electric motor, comprising an end cover, wherein the end cover is the same as that described in any one of claims 1 to 6.

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