End cover and insulation support for electric machine

Abstract

The utility model provides a kind of end cover and insulating support of motor.The end cover includes: end cover body, the first side of end cover body is equipped with at least one mounting hole through the upper and lower surfaces of end cover body;The first side of the end cover is connected with the fixed leg of insulating support through the mounting hole;At least one first limiting part, on the second side of end cover body;The second side of the end cover is connected with the second limiting part of insulating support through the first limiting part.The utility model sets up first limiting part on end cover body, sets up second limiting part on the winding tooth of insulating support, first limiting part and second limiting part cooperate to make end cover and insulating support realize fixed connection, increase the connecting strength of both, improve the strength of fixed coupling, reduce the bad rate caused by coupling escape, improve the working reliability of coupling.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, specifically to an end cover and insulating bracket for an electric motor. Background Technology

[0002] Permanent magnet motors possess advantages such as high power density, small size, and high efficiency, making them widely used in various fields. Among them, the centralized wound permanent magnet synchronous motor, due to its small winding ends, has higher efficiency than the distributed wound motor. The stator assembly of an existing centralized wound permanent magnet motor consists of four parts: the stator core, windings, leads, and an insulating support. The starting ends of the three-phase windings are connected to the leads, and the ends of the three-phase windings are joined together through welding, crimping, or other processes. The connector is insulated and then fixed inside the support using a cover plate. Clips are used for fixing on the outside of the cover plate and the outside of the support. However, when the support is not perfectly circular, the lack of fixation on the inner diameter side makes it prone to warping, causing the connector to escape and resulting in defects. Utility Model Content

[0003] To address the problems in the existing technology, the purpose of this utility model is to provide an end cover and insulating bracket for a motor, thereby improving the connection strength between the end cover and the insulating bracket, reducing the failure rate caused by connector slippage, and improving the working reliability of the connector.

[0004] This utility model embodiment provides an end cover for a motor, comprising:

[0005] An end cap body, wherein at least one mounting hole is provided on the first side of the end cap body, penetrating the upper and lower surfaces of the end cap body; the first side of the end cap is connected to the fixed support leg of the insulating bracket through the mounting hole;

[0006] At least one first limiting portion is provided on the second side of the end cap body; the second side of the end cap is connected to the second limiting portion of the insulating bracket through the first limiting portion.

[0007] In some embodiments, the first defining portion is a protruding structure extending away from the end cap body, or a groove structure recessed inside the end cap body.

[0008] In some embodiments, the first defining portion is a protruding structure, the cross-section of the first defining portion is arrow-shaped, the first defining portion includes a first portion and two second portions, the second portions protruding from one end face of the first portion respectively.

[0009] In some embodiments, the first defining portion is a protruding structure, the cross-section of the first defining portion is arrow-shaped, the first defining portion includes a first portion and a second portion, the second portion protruding from one end face of the first portion.

[0010] In some embodiments, the width of the first part is L1, satisfying: 1mm≤L1≤10mm; the maximum width of the second part protruding from the end face of the first part is L2, satisfying: 0.3mm≤L2≤5mm.

[0011] This utility model embodiment also provides an insulating bracket for a motor, comprising:

[0012] The bracket body is circular in shape, and the upper surface of the bracket body includes a plurality of fixed feet; the fixed feet are connected to the mounting holes on the end cover of the motor as described above.

[0013] Multiple winding teeth are evenly spaced along the inner wall of the bracket body; each winding tooth includes a radial portion and an axial portion, the radial portion extending from the inner wall of the bracket body toward the center point of the bracket body; the axial portion is located on the side of the radial portion away from the bracket body and extends in a direction parallel to the axial direction of the bracket body, the top of the axial portion not exceeding the top of the bracket body; at least one of the axial portions is provided with a second limiting portion, the second limiting portion being connected to the first limiting portion on the end cover of the motor as described above.

[0014] In some embodiments, the second defining portion is a protruding structure or a groove structure.

[0015] In some embodiments, the second defining portion is disposed at the top end of the axial portion.

[0016] In some embodiments, the second defining portion is disposed on the side of the axial portion.

[0017] In some embodiments, the second limiting portion is a groove structure, and the second limiting portion is connected to the first limiting portion as described above, or the second limiting portion is connected to the second limiting portion as described above.

[0018] The motor end cover and insulating bracket provided by this utility model have the following advantages:

[0019] In this technical solution, a first limiting part is provided on the end cap body, and a second limiting part is provided on the winding teeth of the insulating bracket. The first limiting part and the second limiting part cooperate to fix the end cap and the insulating bracket, which increases the connection strength between the two, improves the strength of the fixed connector, reduces the failure rate caused by connector escape, and improves the working reliability of the connector. Attached Figure Description

[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0021] Figure 1This is a schematic diagram of the end cover of a motor according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of an insulating bracket according to an embodiment of the present invention;

[0023] Figure 3 yes Figure 2 An enlarged view of the area indicated by the middle circle;

[0024] Figure 4 This is a schematic diagram of the first limiting part of the end cap provided in an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the end cover of a motor according to another embodiment of the present invention;

[0026] Figure 6 yes Figure 5 An enlarged view of the area indicated by the middle circle;

[0027] Figure 7 This is a schematic diagram of the first limiting part of the end cap provided in another embodiment of the present invention.

[0028] Figure label:

[0029] 100 End Cap 200 Insulating Support

[0030] 110 End cap body 210 Support body

[0031] 111 Mounting hole 211 Fixed support foot

[0032] 120 First limited section 220 winding teeth

[0033] 121 First Part 221 Radial Part

[0034] 122 Part 222 Axial section

[0035] 2221 Second Limited Edition Detailed Implementation

[0036] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0037] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0038] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] It should be further understood that the terms "comprising" or "including" indicate the presence of a feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are interpreted as inclusive, or mean any one or any combination thereof. Therefore, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition only arise when a combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0040] To address the problems in the prior art, one embodiment of this utility model provides an end cover for a motor, comprising:

[0041] An end cap body, wherein at least one mounting hole is provided on the first side of the end cap body, penetrating the upper and lower surfaces of the end cap body; the first side of the end cap is connected to the fixed support leg of the insulating bracket through the mounting hole;

[0042] At least one first limiting portion is provided on the second side of the end cap body; the second side of the end cap is connected to the second limiting portion of the insulating bracket through the first limiting portion.

[0043] This utility model embodiment also provides an insulating bracket for a motor, comprising:

[0044] The bracket body is circular in shape, and the upper surface of the bracket body includes a plurality of fixed feet; the fixed feet are connected to the mounting holes on the end cover of the motor as described above.

[0045] Multiple winding teeth are evenly spaced along the inner wall of the bracket body; each winding tooth includes a radial portion and an axial portion, the radial portion extending from the inner wall of the bracket body toward the center point of the bracket body; the axial portion is located on the side of the radial portion away from the bracket body and extends in a direction parallel to the axial direction of the bracket body, the top of the radial portion does not extend beyond the top of the bracket body; at least one of the radial portions is provided with a second limiting portion, the second limiting portion being connected to the first limiting portion on the end cover of the motor as described above.

[0046] In this technical solution, a first limiting part is provided on the end cap body, and a second limiting part is provided on the winding teeth of the insulating bracket. The first limiting part and the second limiting part cooperate to fix the end cap and the insulating bracket, which increases the connection strength between the two, improves the strength of the fixed connector, reduces the failure rate caused by connector escape, and improves the working reliability of the connector.

[0047] The end cover and insulating bracket of the motor provided by this utility model will be explained below with reference to specific embodiments.

[0048] Figure 1 A schematic diagram of an end cover for a motor according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of an insulating bracket for a motor according to an embodiment of the present invention is shown; Figure 3 It shows Figure 2 An enlarged view of the area indicated by the circle.

[0049] like Figure 1 As shown, an embodiment of the present invention provides an end cover 100 for a motor, including an end cover body 110. The first side of the end cover body 110 is provided with at least one mounting hole 111 that penetrates the upper and lower surfaces of the end cover body 110; at least one first limiting part 120 is provided on the second side of the end cover body 110.

[0050] like Figure 2 and Figure 3As shown, this embodiment of the present invention also provides an insulating bracket 200 for a motor, comprising: a bracket body 210, which is annular in shape, and the upper surface of the bracket body 210 includes a plurality of fixed feet 211; a plurality of winding teeth 220, which are evenly arranged circumferentially along the inner wall of the bracket body 210; each winding tooth 220 includes a radial portion 221 and an axial portion 222, the radial portion 221 extending from the inner wall of the bracket body 210 toward the center point of the bracket body 210; the axial portion 222 is disposed on the side of the radial portion 221 away from the bracket body 210, and extends in a direction parallel to the axial direction of the bracket body 210, the top of the axial portion 222 not exceeding the top of the bracket body 210; at least one axial portion 222 is provided with a second limiting portion 2221. The fixed feet 211 are used to connect with the mounting holes 111 on the end cover 1 of the motor as described above; the second limiting portion 2221 is used to connect with the first limiting portion 120 on the end cover 100 of the motor as described above.

[0051] When the end cap 100 is fixedly connected to the insulating bracket 200, the first side of the end cap 100 is connected to the fixed support leg 211 of the insulating bracket 200 through the mounting hole 111; the second side of the end cap 100 is connected to the second limiting part 2221 of the insulating bracket 200 through the first limiting part 120.

[0052] The first side of the end cover 100 is fixedly connected to the insulating bracket 200 through the mounting hole 111 and the fixing foot 211, and the second side of the end cover 100 is fixedly connected to the insulating bracket 200 through the first limiting part 120 and the second limiting part 2221. When both sides of the end cover 100 are firmly fixed, the strength of the fixed connector can be improved, the failure rate caused by the connector slipping out can be reduced, the reliability of the connector operation can be improved, and the reliability of the motor operation can be improved.

[0053] Furthermore, the first limiting portion 120 is either a protruding structure extending away from the end cap body 110, or a recessed structure embedded inside the end cap body 110. For example, as shown... Figure 1 As shown, in this embodiment, the first limiting portion 120 is a protruding structure extending away from the end cap body 110, and the cross-section of the first limiting portion 120 is arrow-shaped. Specifically, the first limiting portion 120 includes a first portion 121 and two second portions 122, each of the second portions 122 protruding from one end face of the first portion 121. It should be noted that when the first limiting portion 120 is a protruding structure, it is not limited to the arrow shape described above, but can also be other shapes, such as setting the second portion 122 to a circular, elliptical, or rectangular shape, etc. Those skilled in the art can set it according to actual needs.

[0054] Furthermore, such as Figure 4As shown, the width of the first part 121 is L1, which satisfies: 1mm ≤ L1 ≤ 10mm; the maximum width of the second part 122 protruding from the end face of the first part 121 is L2, which satisfies: 0.3mm ≤ L2 ≤ 5mm. For example, L1 can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, or 9mm; L2 can be 1mm, 2mm, 3mm, or 4mm.

[0055] Furthermore, the second limiting portion 2221 is a protruding structure or a recessed structure, and the second limiting portion 2221 is adapted to the first limiting portion 120. For example, as shown... Figure 2 and Figure 3 As shown, the second limiting part 2221 has a groove structure, and the second limiting part 2221 and Figure 1 The shape of the protruding structure of the first limiting part 120 shown is adapted to the shape of the second limiting part 2221, which is connected to the first limiting part 120. This allows the second side of the end cap 100 to be fixedly connected to the insulating bracket 200, thereby increasing the connection strength between the two and preventing the connector from escaping.

[0056] Furthermore, such as Figure 2 and Figure 3 As shown, the second limiting part 2221 is provided at the top end of the axial part 222. Figure 1 The first limiting portion 120 of the end cap 100 shown corresponds to the second limiting portion 2221 provided at the top of the axial portion 222, so that the two can be matched and connected, so that the end cap 100 is fixedly connected to the insulating bracket 200.

[0057] Furthermore, such as Figure 5 and Figure 6 As shown, in another embodiment, the second limiting portion 2221 is provided on the side of the axial portion 222. In this case... Figure 1 The first limiting portion 120 of the end cap 100 shown corresponds to the second limiting portion 2221 provided on the side of the two axial portions 222, so that the two can be connected to each other to fix the end cap 100 to the insulating bracket 200.

[0058] Furthermore, such as Figure 7 As shown, when the second limiting portion 2221 on the insulating support 200 is an arrow-shaped groove structure, the first limiting portion 120 can also have an arrow-shaped cross-section; specifically, the first limiting portion 120 includes a first portion 121 and a second portion 122, the second portion 122 protruding from one end face of the first portion 121, that is, the second limiting portion 2221 on an axial portion 222 is fixedly connected to a first limiting portion 120. Figure 7As shown, the width of the first part 121 is L1, which satisfies: 1mm ≤ L1 ≤ 10mm; the maximum width of the second part 122 protruding from the end face of the first part 121 is L2, which satisfies: 0.3mm ≤ L2 ≤ 5mm. For example, L1 can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, or 9mm; L2 can be 1mm, 2mm, 3mm, or 4mm.

[0059] In summary, the motor end cover and insulating bracket provided by this utility model have the following advantages:

[0060] In this technical solution, a first limiting part is provided on the end cap body, and a second limiting part is provided on the winding teeth of the insulating bracket. The first limiting part and the second limiting part cooperate to fix the end cap and the insulating bracket, which increases the connection strength between the two, improves the strength of the fixed connector, reduces the failure rate caused by connector escape, and improves the working reliability of the connector.

[0061] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An end cover for an electric motor, characterized in that, include: An end cap body, wherein at least one mounting hole is provided on the first side of the end cap body, penetrating the upper and lower surfaces of the end cap body; the first side of the end cap is connected to the fixed support leg of the insulating bracket through the mounting hole; At least one first limiting portion is provided on the second side of the end cap body; the second side of the end cap is connected to the second limiting portion of the insulating bracket through the first limiting portion.

2. The end cover of the motor according to claim 1, characterized in that, The first limiting part is either a protruding structure extending away from the end cap body or a groove structure recessed inside the end cap body.

3. The end cover of the motor according to claim 1, characterized in that, The first limiting part is a protruding structure, and the cross-section of the first limiting part is arrow-shaped. The first limiting part includes a first part and two second parts, and the second parts protrude from one end face of the first part.

4. The end cover of the motor according to claim 1, characterized in that, The first limiting part is a protruding structure, the cross-section of the first limiting part is arrow-shaped, the first limiting part includes a first part and a second part, and the second part protrudes from one end face of the first part.

5. The end cover of the motor according to claim 3 or 4, characterized in that, The width of the first part is L1, which satisfies: 1mm≤L1≤10mm; the maximum width of the second part protruding from the end face of the first part is L2, which satisfies: 0.3mm≤L2≤5mm.

6. An insulating bracket for an electric motor, characterized in that, include: The bracket body is circular in shape, and the upper surface of the bracket body includes a plurality of fixed feet; the fixed feet are connected to the mounting holes on the end cover of the motor as described in any one of claims 1 to 5. Multiple winding teeth are evenly spaced along the inner wall of the bracket body; each winding tooth includes a radial portion and an axial portion, the radial portion extending from the inner wall of the bracket body toward the center point of the bracket body; the axial portion is located on the side of the radial portion away from the bracket body and extends in a direction parallel to the axial direction of the bracket body, the top of the axial portion not exceeding the top of the bracket body; at least one of the axial portions is provided with a second limiting portion, the second limiting portion being connected to the first limiting portion on the end cover of the motor as described in any one of claims 1 to 5.

7. The insulating bracket for the motor according to claim 6, characterized in that, The second limiting part is a protruding structure or a groove structure.

8. The insulating bracket for the motor according to claim 6, characterized in that, The second limiting portion is located at the top end of the axial portion.

9. The insulating bracket for the motor according to claim 6, characterized in that, The second limiting portion is provided on the side of the axial portion.

10. The insulating bracket for the motor according to claim 6, characterized in that, The second limiting part is a groove structure, and the second limiting part is connected to the first limiting part as described in claim 3, or the second limiting part is connected to the second limiting part as described in claim 4.

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