Motor insulation support structure, motor and compressor

Abstract

This utility model relates to the field of compressor technology, and more particularly to a motor insulation support structure, a motor including the motor insulation support structure, and a compressor including the motor. The motor insulation support structure includes a support and a cover plate. The support is mounted on the end face of the motor's stator core. The cover plate is located at the end of the support away from the stator core. The cover plate includes a cover portion opposite to the end of the support away from the stator core and a partition portion located on the outer periphery of the cover portion. The partition portion is sleeved on the outer periphery of the support and shields the enameled wires running on the outer periphery of the support. This increases the insulation distance between the enameled wires and the housing, effectively increasing the insulation strength between the enameled wires and the housing. This improves product reliability while meeting the development requirements of reducing the yoke size of the motor stator core; it also protects the enameled wires, making them less susceptible to contact damage during assembly.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a motor insulation support structure, a motor including the motor insulation support structure, and a compressor including the motor. Background Technology

[0002] The development methods for compressor motors are diverse, and the motor sizes also come in different forms. For small motors, as the motor size decreases, the space for the yoke portion of the stator core is also compressed.

[0003] like Figure 1 As shown, the motor housing 1 is fixed to the outer circumference of the stator core 2 by heat fitting or welding. Insulating supports 3 are installed on the end faces of the stator core 2. Enamelled wire 4 is wound onto the stator teeth of the stator core 2 and the insulating supports 3 at both ends of the stator core 2 to form enamelled coils. Different enamelled coils need to be conductive according to design requirements. Therefore, after one turn of enamelled wire 4 is wound, it passes through the outer periphery of the insulating support 3 to enter the next winding slot for winding. A wire-limiting protrusion 5 is provided on the outer circumference of the insulating support 3 to limit the wire path of the enamelled wire 4 around the insulating support 3. Thus, the distance between the enamelled wire 4 and the housing 1 = the yoke dimension of the stator core 2 - the wall thickness of the insulating support 3 - the diameter of the enamelled wire 4. Considering the discharge of the enamelled wire 4 to the housing 1 during motor operation, the distance between the enamelled wire 4 and the housing 1 is subject to certain limitations. When the yoke size of the stator core 2 is small during the motor development process, and the wall thickness of the insulation support 3 cannot be reduced in order to ensure strength, the distance between the enameled wire 4 and the housing 1 will be small, and there will be a situation where the enameled wire 4 discharges to the housing 1. This will seriously affect the reliability of the whole machine. Therefore, the yoke size of the stator core 2 also has a limit value, which affects the motor development. Utility Model Content

[0004] In view of the above-mentioned defects in the prior art, the technical problem to be solved by this utility model is to provide a motor insulation support structure that can increase the insulation strength between the enameled wire and the housing, so as to meet the motor development needs and improve product reliability.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This utility model provides a motor insulation support structure, including a support and a cover plate. The support is installed on the end face of the stator core of the motor, and the cover plate is located at the end of the support away from the stator core. The cover plate includes a cover portion that is connected to the end of the support away from the stator core and a partition portion located on the outer periphery of the cover portion. The partition portion is sleeved on the outer periphery of the support and covers the enameled wires running on the outer periphery of the support.

[0007] Preferably, the outer peripheral surface of the bracket is provided with a wiring limiting protrusion for limiting the enameled wire that runs on the outer peripheral side of the bracket. The protrusion dimension of the wiring limiting protrusion relative to the outer peripheral surface of the bracket is not less than the diameter of the enameled wire, and the inner diameter of the partition is not less than the diameter of the circumference of the side edge of the wiring limiting protrusion away from the bracket, which is concentric with the bracket.

[0008] Preferably, the outer diameter of the partition is smaller than the outer diameter of the stator core.

[0009] Preferably, a rotary fitting structure is provided between the cover plate and the bracket, and the rotary fitting structure fixes the cover plate and the bracket by rotating the cover plate relative to the bracket.

[0010] Preferably, the rotary fitting structure includes a first buckle on the end of the bracket away from the stator core, an arc-shaped groove on the cover portion along the circumference of the cover plate and engaging with the first buckle, a boss on the outer circumferential surface of the bracket, and a locking platform on the inner circumferential surface of the partition portion and arranged opposite to the boss along the circumference of the bracket. The arc-shaped groove has a movable space for the first buckle and the cover plate to rotate relative to each other. The rotation direction of the cover plate relative to the bracket is from the upstream side to the downstream side. When the first buckle is located at the downstream end of the arc-shaped groove, the locking platform is located on the upstream side of the boss and can pass through the boss in the rotation direction. When the first buckle is located at the upstream end of the arc-shaped groove, the locking platform is located on the downstream side of the boss and engaging with the boss.

[0011] Preferably, a first slot is formed between the upstream end of the first buckle and the bracket, and the upstream edge of the arc-shaped groove is inserted into the first slot in the direction of rotation.

[0012] Preferably, the upstream sidewall of the boss is an inclined surface that extends outward from the outer periphery of the support and slopes towards the downstream side, and the downstream sidewall of the card plate is an inclined surface that is parallel to the upstream sidewall of the boss.

[0013] Preferably, the rotary fitting structure further includes a second buckle disposed on the end of the bracket away from the stator core and a notch groove disposed on the cover plate along the circumference of the cover plate and inserted into the second buckle. The notch groove passes through the outer periphery of the cover and the partition portion, and has a movable space for the second buckle and the cover plate to rotate relative to each other. A second slot is formed between the upstream end of the second buckle and the bracket, and the upstream edge of the notch groove is inserted into the second slot along the rotation direction.

[0014] This utility model also provides an electric motor, including the electric motor insulation support structure described above.

[0015] This utility model also provides a compressor, including the motor described above.

[0016] Compared with the prior art, this utility model has significant progress:

[0017] The motor insulation bracket structure of this utility model has a partition on the outer periphery of the cover plate. The partition isolates the enameled wire from the motor housing on the outer periphery of the bracket, blocking the air between the enameled wire and the housing. This increases the insulation distance between the enameled wire and the housing, i.e., increases the safety distance, and effectively increases the insulation strength between the enameled wire and the housing. Thus, it can improve product reliability while meeting the development requirements of reducing the size of the yoke of the motor stator core. At the same time, the partition also shields the enameled wire running on the outer periphery of the bracket, protecting the enameled wire and making it less likely to be damaged by contact during assembly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the wiring of the enameled wire in a motor in the prior art.

[0019] Figure 2 This is a three-dimensional schematic diagram of the motor insulation support structure according to an embodiment of the present utility model.

[0020] Figure 3 This is a front view schematic diagram of the motor insulation support structure according to an embodiment of this utility model.

[0021] Figure 4 This is a top view schematic diagram of the motor insulation support structure according to an embodiment of the present utility model.

[0022] Figure 5 yes Figure 4 A cross-sectional view along the AA direction.

[0023] Figure 6 This is a schematic diagram of the enameled wires that are shielded by the motor insulation bracket structure of this utility model embodiment, which is used to cover the wiring on the outer periphery of the bracket.

[0024] Figure 7 This is a three-dimensional schematic diagram of the motor insulation support structure according to an embodiment of the present utility model.

[0025] Figure 8 This is a three-dimensional schematic diagram of the cover plate in the motor insulation support structure of this utility model embodiment.

[0026] Figure 9 This is a top view of the cover plate in the motor insulation support structure of this utility model embodiment.

[0027] Figure 10 yes Figure 9 A cross-sectional view along the BB direction.

[0028] Figure 11 This is a schematic diagram showing the engagement between the locking platform on the cover plate and the protrusion on the bracket in the motor insulation bracket structure of this utility model embodiment.

[0029] The reference numerals in the attached figures are explained as follows:

[0030] 1. Shell

[0031] 2. Stator core

[0032] 3 Insulating support

[0033] 4. Enameled wire

[0034] 5. Cable routing limit protrusions

[0035] 100 brackets

[0036] 101 First buckle

[0037] 102 convex platform

[0038] 103 First Slot

[0039] 104 Second buckle

[0040] 105 Second Slot

[0041] 200 cover plate

[0042] 201 cover

[0043] 202 Partition

[0044] 203 Arc-shaped groove

[0045] 204 Cards

[0046] 205 Notch Detailed Implementation

[0047] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0048] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0051] like Figures 2 to 11 The image shows one embodiment of the motor insulation support structure provided by this utility model.

[0052] See Figures 2 to 6 The motor insulation support structure of this embodiment includes a support 100 and a cover plate 200. The support 100 is mounted on the end face of the stator core 2 of the motor and is used for winding enameled wire 4. The support 100 is made of insulating material. The cover plate 200 is located at the end of the support 100 away from the stator core 2. The cover plate 200 includes a cover portion 201 and a partition portion 202. The cover portion 201 is connected to the end of the support 100 away from the stator core 2 and is used to cover the end of the support 100 away from the stator core 2. The partition portion 202 is located on the outer periphery of the cover portion 201 and is sleeved on the outer periphery of the support 100. The partition portion 202 will block the enameled wire 4 that runs on the outer periphery of the support 100. Therefore, by using the partition 202 of the cover plate 200 to block the enameled wire 4 from the motor housing 1 on the outer periphery of the bracket 100, the air between the enameled wire 4 and the housing 1 is blocked, which increases the insulation distance between the enameled wire 4 and the housing 1, that is, increases the safety distance, and effectively increases the insulation strength between the enameled wire 4 and the housing 1. Thus, while meeting the development requirements of reducing the size of the yoke of the motor stator core 2, the product reliability can be improved. At the same time, the partition 202 will also shield the enameled wire 4 that is routed on the outer periphery of the bracket 100, and can also protect the enameled wire 4, making it less likely to cause contact damage to the enameled wire 4 during assembly.

[0053] See Figure 5 and Figure 6Preferably, a wiring limiting protrusion 5 is provided on the outer peripheral surface of the bracket 100. The wiring limiting protrusion 5 is used to limit the enameled wire 4 that is routed on the outer peripheral side of the bracket 100. The protrusion dimension of the wiring limiting protrusion 5 relative to the outer peripheral surface of the bracket 100 is not less than the diameter of the enameled wire 4, so that the enameled wire 4 can be completely accommodated within the limiting space defined by the wiring limiting protrusion 5 on the outer peripheral surface of the bracket 100. The inner diameter of the partition 202 is not less than the diameter of the circumference of the side edge of the wiring limiting protrusion 5 that is away from the bracket 100 and is concentric with the bracket 100, so that the partition 202 can be fitted over the wiring limiting protrusion 5, thereby blocking the enameled wire 4. Preferably, the inner diameter of the partition 202 is larger than the diameter of the circumference of the side edge of the wiring limiting protrusion 5 that is away from the bracket 100 and is concentric with the bracket 100, so that the partition 202 and the wiring limiting protrusion 5 are in clearance fit, thereby facilitating the assembly of the cover plate 200 and the bracket 100.

[0054] See Figure 5 and Figure 6 Preferably, the outer diameter of the partition portion 202 of the cover plate 200 is smaller than the outer diameter of the stator core 2, so that the partition portion 202 is located between the bracket 100 and the housing 1 that is sleeved on the outer peripheral surface of the stator core 2, thereby blocking the enameled wire 4 that runs on the outer peripheral side of the bracket 100 from the housing 1 of the motor.

[0055] In this embodiment, preferably, a rotary fit structure is provided between the cover plate 200 and the bracket 100. The rotary fit structure fixes the cover plate 200 and the bracket 100 by rotating the cover plate 200 relative to the bracket 100. Since the partition portion 202 is added to the outer periphery of the cover plate 200 to meet the development requirement of reducing the yoke size of the motor stator core 2 and thus increasing the safety distance between the enameled wire 4 and the housing 1, the partition portion 202 is relatively thin and long. If a traditional axial compression fit structure is used to assemble and fix the cover plate 200 and the bracket 100, the partition portion 202 is prone to breakage or damage. This embodiment uses a rotary fit structure, fixing the cover plate 200 and the bracket 100 by rotating the cover plate 200 relative to the bracket 100, avoiding axial compression of the partition portion 202, and ensuring the fit strength while preventing breakage or damage to the partition portion 202.

[0056] See Figure 1 , Figures 7 to 11Preferably, the rotating engagement structure includes a first snap-fit ​​101, an arc-shaped groove 203, a boss 102, and a locking platform 204. The first snap-fit ​​101 is located on the end of the bracket 100 away from the stator core 2. The arc-shaped groove 203 is located on the cover portion 201 of the cover plate 200, extending circumferentially along the cover plate 200. The arc-shaped groove 203 engages with the first snap-fit ​​101, and there is a space between the two ends of the arc-shaped groove 203 for relative rotation between the first snap-fit ​​101 and the cover plate 200. The boss 102 is located on the outer circumferential surface of the bracket 100, and the locking platform 204 is located on the inner circumferential surface of the partition portion 202. The locking platform 204 and the boss 102 are arranged opposite each other circumferentially along the bracket 100. The rotational engagement structure fixes the cover plate 200 to the bracket 100 by rotating the cover plate 200 relative to the bracket 100. The rotation direction of the cover plate 200 relative to the bracket 100 is from the upstream side to the downstream side. Preferably, the rotation direction of the cover plate 200 relative to the bracket 100 is counterclockwise. When the first latch 101 is located at the downstream end of the arc-shaped groove 203, the latching platform 204 is located on the upstream side of the boss 102 and can pass through the boss 102 in the rotational direction; when the first latch 101 is located at the upstream end of the arc-shaped groove 203, the latching platform 204 is located on the downstream side of the boss 102 and engages with the boss 102. During assembly, the cover plate 200 and the bracket 100 are first fitted together to initially fix the cover plate 200, so that the cover part 201 and the end of the bracket 100 away from the stator core 2 are connected, the arc groove 203 is inserted into the first buckle 101, and the first buckle 101 is located at the downstream end of the arc groove 203. The partition part 202 is sleeved on the outer periphery of the bracket 100, and the locking platform 204 is located on the upstream side of the boss 102. Then, the cover plate 200 is rotated in the rotation direction, and the arc groove 203 rotates from the upstream side to the downstream side relative to the first buckle 101, so that the first buckle 101 changes from the downstream end of the arc groove 203 to the upstream end of the arc groove 203. The locking platform 204 rotates from the upstream side of the boss 102 to the downstream side relative to the boss 102 and passes through the boss 102 to reach the downstream side of the boss 102. When the first latch 101 abuts against the upstream end of the arc-shaped groove 203, the first latch 101 prevents the cover plate 200 from continuing to rotate in the rotation direction; when the locking platform 204 engages with the boss 102 on the downstream side of the boss 102, the boss 102 prevents the cover plate 200 from rotating in the opposite direction. Thus, the cover plate 200 and the bracket 100 can be fixed together.

[0057] See Figure 1 and Figure 7 Preferably, a first slot 103 is formed between the upstream end of the first buckle 101 and the bracket 100, and the upstream edge of the arc groove 203 is inserted into the first slot 103 in the rotation direction, so that the first buckle 101 prevents the cover plate 200 from continuing to rotate in the rotation direction.

[0058] See Figure 7 , Figure 10 and Figure 11 Preferably, the upstream sidewall of the boss 102 is an inclined surface that extends outward from the outer periphery of the support 100 and slopes towards the downstream side, and the downstream sidewall of the locking platform 204 is an inclined surface parallel to the upstream sidewall of the boss 102. Thus, when the locking platform 204 rotates from the upstream side of the boss 102 to the downstream side and passes through the boss 102, the downstream sidewall of the locking platform 204 and the upstream sidewall of the boss 102 slide in inclined contact, which facilitates the locking platform 204 to reach the downstream side of the boss 102.

[0059] See Figure 7 , Figure 10 and Figure 11 Preferably, the downstream sidewall of the boss 102 is a vertical surface that extends radially outward from the outer periphery of the bracket 100, and the upstream sidewall of the locking platform 204 is a vertical surface parallel to the downstream sidewall of the boss 102. Thus, after the locking platform 204 passes the boss 102 and reaches the downstream side of the boss 102, the upstream sidewall of the locking platform 204 can abut against the downstream sidewall of the boss 102, so that the locking platform 204 is engaged with the boss 102 on the downstream side of the boss 102.

[0060] See Figure 1 , Figures 7 to 9Preferably, the rotary engagement structure further includes a second snap-fit ​​104 and a notch 205. The second snap-fit ​​104 is located on the end of the bracket 100 away from the stator core 2. The notch 205 is located on the cover plate 200 and extends circumferentially along the cover plate 200. The notch 205 penetrates the outer periphery of the cover portion 201 and the partition portion 202 of the cover plate 200. The notch 205 is positioned to avoid the enameled wire 4 running on the outer periphery of the bracket 100. The notch 205 engages with the second snap-fit ​​104 and has a space for relative rotation between the second snap-fit ​​104 and the cover plate 200. A second slot 105 is formed between the upstream end of the second snap-fit ​​104 and the bracket 100. The upstream edge of the notch 205 engages with the second slot 105 in the rotational direction. The second slot 105 extends circumferentially along the cover plate 200 in a dimension greater than the first slot 103 extends circumferentially along the cover plate 200. During assembly, when the cover plate 200 is initially fixed by fitting it to the bracket 100, the notch 205 engages with the second latch 104, with the second latch 104 located at the downstream end of the notch 205. Then, the cover plate 200 is rotated in the rotational direction to its final position, causing the first latch 101 to shift from its downstream position relative to the arcuate groove 203 to its upstream position. When the latch 204 rotates from its upstream position relative to the boss 102 towards its downstream position and engages with the boss 102, the second latch 104 shifts from its position relative to the notch 205 towards its downstream position. The downstream end of the notch 205 is moved to the upstream end of the notch 205, and the upstream edge of the notch 205 is inserted into the second slot 105 to limit the cover plate 200 and prevent it from rotating further in the rotation direction. The boss 102 prevents the cover plate 200 from rotating in the reverse direction, so that the cover plate 200 and the bracket 100 are fixed together in the circumferential direction. At the same time, the upstream edge of the notch 205 of the cover plate 200 is inserted into the second slot 105 between the upstream end of the second buckle 104 and the bracket 100, so that the cover plate 200 and the bracket 100 are fixed together in the axial direction. Thus, the cover plate 200 and the bracket 100 are fixed together.

[0061] In this embodiment, a plurality of first buckles 101 and a plurality of second buckles 104 may be provided on the end of the bracket 100 away from the stator core 2. The plurality of first buckles 101 and the plurality of second buckles 104 are arranged alternately along the circumference of the bracket 100. Correspondingly, a plurality of arc-shaped grooves 203 and a plurality of notched grooves 205 are arranged alternately along the circumference of the cover plate 200. The plurality of arc-shaped grooves 203 are arranged one-to-one with the plurality of first buckles 101, and the plurality of notched grooves 205 are arranged one-to-one with the plurality of second buckles 104.

[0062] Based on the motor insulation support structure of this utility model, this utility model embodiment also provides a motor, the motor of this embodiment including the motor insulation support structure described above.

[0063] Based on the motor of this utility model, this utility model embodiment also provides a compressor, which includes the motor described above.

[0064] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A motor insulation support structure, characterized in that, The device includes a bracket (100) and a cover plate (200). The bracket (100) is mounted on the end face of the stator core (2) of the motor. The cover plate (200) is located at the end of the bracket (100) away from the stator core (2). The cover plate (200) includes a cover portion (201) that is connected to the end of the bracket (100) away from the stator core (2) and a partition portion (202) located on the outer periphery of the cover portion (201). The partition portion (202) is sleeved on the outer periphery of the bracket (100) and covers the enameled wire (4) that runs on the outer periphery of the bracket (100).

2. The motor insulation support structure according to claim 1, characterized in that, The bracket (100) has a wiring limiting protrusion (5) on its outer peripheral surface for limiting the enameled wire (4) that runs on the outer peripheral side of the bracket (100). The protrusion dimension of the wiring limiting protrusion (5) relative to the outer peripheral surface of the bracket (100) is not less than the diameter of the enameled wire (4). The inner diameter of the partition (202) is not less than the diameter of the circumference of the side edge of the wiring limiting protrusion (5) away from the bracket (100) that is concentric with the bracket (100).

3. The motor insulation support structure according to claim 1, characterized in that, The outer diameter of the partition (202) is smaller than the outer diameter of the stator core (2).

4. The motor insulation support structure according to any one of claims 1 to 3, characterized in that, A rotational fitting structure is provided between the cover plate (200) and the bracket (100). The rotational fitting structure fixes the cover plate (200) and the bracket (100) by rotating the cover plate (200) relative to the bracket (100).

5. The motor insulation support structure according to claim 4, characterized in that, The rotating engagement structure includes a first buckle (101) located on the end of the bracket (100) away from the stator core (2), an arc-shaped groove (203) located on the cover portion (201) along the circumference of the cover plate (200) and engaging with the first buckle (101), a boss (102) located on the outer circumferential surface of the bracket (100), and a locking platform (204) located on the inner circumferential surface of the partition portion (202) and arranged opposite to the boss (102) along the circumferential direction of the bracket (100). The arc-shaped groove (203) provides a space for the first buckle (101) to engage with the stator core (2). The cover plate (200) has a relatively rotating space; the cover plate (200) rotates relative to the bracket (100) from the upstream side to the downstream side. When the first buckle (101) is located at the downstream end of the arc groove (203), the locking platform (204) is located on the upstream side of the boss (102) and can pass through the boss (102) along the rotation direction; when the first buckle (101) is located at the upstream end of the arc groove (203), the locking platform (204) is located on the downstream side of the boss (102) and engages with the boss (102).

6. The motor insulation support structure according to claim 5, characterized in that, A first slot (103) is formed between the upstream end of the first buckle (101) and the bracket (100), and the upstream edge of the arc groove (203) is inserted into the first slot (103) along the rotation direction.

7. The motor insulation support structure according to claim 5, characterized in that, The upstream sidewall of the boss (102) is an inclined surface that extends outward from the outer periphery of the bracket (100) and slopes to the downstream side, and the downstream sidewall of the card plate (204) is an inclined surface that is parallel to the upstream sidewall of the boss (102).

8. The motor insulation support structure according to claim 5, characterized in that, The rotating engagement structure further includes a second latch (104) disposed on one end of the bracket (100) away from the stator core (2) and a notch (205) disposed on the cover plate (200) along the circumference of the cover plate (200) and engaged with the second latch (104). The notch (205) penetrates the outer periphery of the cover portion (201) and the partition portion (202). The notch (205) has a space for relative rotation of the second latch (104) and the cover plate (200). A second slot (105) is formed between the upstream end of the second latch (104) and the bracket (100). The upstream edge of the notch (205) is engaged with the second slot (105) along the rotation direction.

9. An electric motor, characterized in that, Includes the motor insulation support structure as described in any one of claims 1 to 8.

10. A compressor, characterized in that, Includes the motor as described in claim 9.

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