A phase-to-phase insulating sheet, a motor, and a device for placing and transporting the insulating sheet.
By designing interphase insulation sheets with connecting ribs and indentation protrusions, as well as a placement and handling device, the problem of automated assembly of insulation sheets at both ends of the motor stator core was solved, enhancing bending resistance and realizing automated production and improved assembly efficiency of the motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI ZHONGXUN DONGFENG ELECTRIC APPLIANCE MFG CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-05-26
Smart Images
Figure CN224289433U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, specifically to an interphase insulating sheet, a motor, and a device for placing and transporting the insulating sheet. Background Technology
[0002] Taking the motor of a new energy vehicle as an example, the stator of the motor has three-phase windings wound one phase at a time, with the portion of each phase winding protruding from the stator slot forming a coil. To ensure the insulation performance of the windings, interphase insulation sheets are installed between adjacent phase windings. These interphase insulation sheets separate the coil ends of different phases in the motor stator, preventing interphase short circuits caused by potential differences. By effectively separating the windings, the interphase insulation sheets improve the reliability of motor operation and avoid faults caused by insulation problems. The interphase insulation sheets play a crucial role in the motor, preventing short circuits between different phases and ensuring the independence and safety of each phase winding. They are a key component for the safe and stable operation of the motor.
[0003] In existing motors, see Appendix Figure 4 As shown, coil windings are provided at both ends of the stator core, and multiple coaxial coil windings are arranged radially at each end. Radially adjacent coil windings are separated by interphase insulation sheets. In existing motors, the interphase insulation sheets at both ends of the stator core are often independent, requiring separate installation during assembly, which complicates the process. Some motors connect the interphase insulation sheets at both ends of the stator core using connecting parts to form a single unit. For example, the invention patent with application number CN200910068183.X discloses an insulation structure for a motor stator winding, where connecting strips connect the insulation sheets at both ends of the stator core, and corresponding slots are provided in the stator core to accommodate the connecting parts. However, this insulation structure is limited by the stator core structure; the width of the slots is generally small, the total width of the connecting strips cannot be too large, and the number of strips cannot be excessive. Therefore, the structural stability of the insulation structure is poor before assembly. During assembly, especially when using robotic arms for automated assembly, the insulation structure needs to be assembled in an upright position. At this time, it is difficult for the insulation structure to maintain a stable shape. The thin and flat connecting strip has poor bending resistance and will bend due to the insulation skin at the top, making it difficult to maintain an upright position. Therefore, it is still basically done manually, and it is difficult to automate the assembly. Utility Model Content
[0004] In view of the shortcomings of the prior art described above, the technical problem to be solved by this utility model is to provide an interphase insulating sheet, a motor, and an insulating sheet placement and handling device. The interphase insulating sheet can be used to isolate the coil windings at both ends at the same time, and its shape is stable. It can maintain a good upright state during assembly, which is convenient for handling and automated operation.
[0005] To achieve the above objectives, this utility model provides an interphase insulating sheet, including an upper insulating sheet, a lower insulating sheet, and a connecting sheet. The connecting sheet connects the upper insulating sheet and the lower insulating sheet at both ends along its length. The connecting sheet includes a plurality of connecting ribs arranged and spaced apart along its width, with strip-shaped gaps between adjacent connecting ribs. The width of the strip-shaped gaps is 3 to 10 μm, and the width of the connecting ribs is 3 to 10 μm. The connecting ribs are provided with indented protrusions that bulge out to one side, and the indented protrusions extend along the length of the connecting ribs.
[0006] Furthermore, the number of connecting ribs in the connecting piece is 3.
[0007] Furthermore, the connecting ribs in the connecting piece are parallel to each other.
[0008] Furthermore, the two ends of the indentation protrusion are spaced from the upper and lower insulating sheets, the two ends of the connecting piece have the same thickness as the upper and lower insulating sheets respectively, and the surface of the connection between the connecting piece and the upper insulating sheet is smoothly transitioned, and the surface of the connection between the connecting piece and the lower insulating sheet is smoothly transitioned.
[0009] Furthermore, the upper insulating sheet, lower insulating sheet, and connecting sheet are made of the same material and are an integral structure.
[0010] Furthermore, the upper insulating sheet, lower insulating sheet, and connecting sheet are made of polyethylene terephthalate, polyimide film, polytetrafluoroethylene film, or polyethylene naphthalate.
[0011] Furthermore, the indentation protrusion is V-shaped or arc-shaped on the cross-section perpendicular to the length direction of the connecting rib.
[0012] This utility model also provides a motor, including a stator core and coil windings. Multiple coaxially arranged coil windings are provided at both ends of the stator core. It also includes the aforementioned interphase insulating sheets, with the upper and lower insulating sheets located at the ends of the stator core and positioned between two coil windings. A connecting piece passes through the stator core.
[0013] This utility model also provides an insulating sheet placement and transport device for placing and transporting the aforementioned interphase insulating sheets. The insulating sheet placement and transport device includes a base plate, support rods, upper support blocks, and lower support blocks. There are two support rods, which are vertically fixed to the base plate. An upper support block and a lower support block are fixed on the support rods. When the interphase insulating sheet is placed in the insulating sheet placement and transport device, the connecting piece is located between the two support rods. The lower side of the upper insulating sheet abuts against the upper side of the two upper support blocks, and the upper side of the lower insulating sheet abuts against the lower side of the two upper support blocks.
[0014] As described above, the interphase insulating sheet, motor, and insulating sheet placement and transport device involved in this utility model have the following characteristics:
[0015] Beneficial effects:
[0016] 1. The connecting strips of the phase-to-phase insulation sheet are designed with multiple spaced connecting ribs with indented protrusions, which enhances the bending resistance of the connecting ribs and makes them less prone to bending. Therefore, with a fixed overall width, the connecting strips can significantly improve bending resistance. When the phase-to-phase insulation sheet is upright, the connecting strips are less prone to bending, ensuring that the phase-to-phase insulation sheet can maintain a good upright position. This facilitates the installation of the phase-to-phase insulation sheet and overcomes the shortcomings of ordinary flat connecting strips in existing designs, which have poor hardness and bending resistance. The phase-to-phase insulation sheet can be used for various motor stators, and has good applicability and standardization.
[0017] 2. By incorporating the interphase insulation strips described in this application, the motor can be easily assembled automatically, making it suitable for automated production and reducing labor costs. The interphase insulation strips are well-suited for insulation isolation between adjacent coil windings at both ends of the stator core in the motor. The interphase insulation strips can be used in various motor stators, demonstrating excellent applicability and standardization.
[0018] 3. By setting up an insulation sheet placement and handling device, it is possible to facilitate the vertical storage and handling of phase-to-phase insulation sheets, and to ensure that the phase-to-phase insulation sheets are in a good vertical position for retrieval and assembly. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the phase-to-phase insulating sheet in this utility model.
[0020] Figure 2 This is a cross-sectional schematic diagram of the connecting piece in this utility model.
[0021] Figure 3 This is a schematic diagram of the installation of the interphase insulating sheet in the motor according to this utility model.
[0022] Figure 4 This is a schematic diagram of the insulating sheet placement and handling device in this utility model.
[0023] Figure 5 for Figure 4 Side view.
[0024] Explanation of icon numbers
[0025] 1. Upper insulating sheet
[0026] 2. Lower end insulating sheet
[0027] 3 Connecting pieces
[0028] 31 Strip gap
[0029] 32 Connecting ribs
[0030] 321 Indentation protrusion
[0031] 4. Stator core
[0032] 5 coil windings
[0033] 6. Base plate
[0034] 7. Support rod
[0035] 8. Upper support block
[0036] 9. Lower support block Detailed Implementation
[0037] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0038] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.
[0039] See Figures 1 to 5 This utility model provides an interphase insulating sheet, including an upper insulating sheet 1, a lower insulating sheet 2, and a connecting sheet 3. The two ends of the connecting sheet 3 along its length are respectively connected to the upper insulating sheet 1 and the lower insulating sheet 2. The connecting sheet 3 includes a plurality of connecting ribs 32 arranged and spaced apart along the width direction, and there are strip-shaped gaps 31 between adjacent connecting ribs 32. In other words, a plurality of strip-shaped gaps 31 arranged and spaced apart along the width direction can be provided in a connecting sheet 3, thereby forming a plurality of spaced connecting ribs 32 in the connecting sheet 3. The width of the strip-shaped gaps 31 is 3 to 10 μm, the width of the connecting ribs 32 is 3 to 10 μm, and the connecting ribs 32 are provided with indentation protrusions 321 protruding to one side, and the indentation protrusions 321 extend along the length direction of the connecting ribs 32.
[0040] Compared to existing designs, the phase-to-phase insulating sheet of this invention improves upon the existing design by replacing multiple flat, slender connecting strips with large spacing with a connecting sheet 3 containing multiple small-spacing connecting ribs 32 with indented protrusions 321. Because the connecting ribs 32 have indented protrusions 321 protruding to one side, their structural strength is improved, enhancing their bending resistance and making them less prone to bending. Therefore, with a fixed overall width, the connecting sheet 3 has excellent bending resistance. When the phase-to-phase insulating sheet is upright, the connecting sheet 3 is less prone to bending, ensuring that the phase-to-phase insulating sheet maintains a good upright position. This facilitates the installation of the phase-to-phase insulating sheet and overcomes the shortcomings of existing designs where ordinary flat connecting strips have poor hardness and are not resistant to bending. During installation, a robotic arm can be used to pick up one phase-to-phase insulating sheet at a time and place it in the corresponding position on the motor. Meanwhile, the connecting piece 3 of the phase-to-phase insulation sheet of this utility model requires a small width, and the width of the slot required to match it in the stator core 4 of the motor is also small, making it easy to install into the slot. It can be set in a narrow slot, which can reduce the impact on the structure of the stator core 4. It can be adapted to motors with slots of various widths, and has wide applicability. When the phase-to-phase insulation sheet is installed in the motor, see [reference needed]. Figure 3 The upper insulating sheet 1 is located at the upper end of the stator core 4, rolled into a cylindrical shape, and is placed between the two coaxial coil windings 5 to serve as an insulator. The lower insulating sheet 2 is located at the lower end of the stator core 4, rolled into a cylindrical shape, and is placed between the two coaxial coil windings 5 to serve as an insulator. The connecting piece 3 passes through the stator core 4 and is specifically located in the wire slot.
[0041] See Figures 1 to 5 The present invention will be further described below with reference to a specific embodiment:
[0042] In this embodiment, see Figure 1 and Figure 2 As a preferred design, the connecting ribs 32 of the connecting piece 3 are three. This ensures that the connecting piece 3 has good overall bending resistance while also having a relatively small width, thus balancing both bending performance and width. In other embodiments, the number of connecting ribs 32 can be different based on the width of the slots in the stator core 4. Furthermore, the connecting ribs 32 in the connecting piece 3 are parallel to each other, meaning the strip gaps 31 are also parallel to each other, facilitating processing and use.
[0043] In this embodiment, see Figure 1 and Figure 2As a preferred design, the indentation protrusion 321 in the connecting rib 32 extends continuously for an appropriate length along the length direction. Its two ends can be slightly shorter than the length of the connecting piece 3. That is, the two ends of the indentation protrusion 321 along the length direction have a suitable and small gap with the upper insulating sheet 1 and the lower insulating sheet 2. The thickness of both ends of the connecting piece 3 is the same as that of the upper insulating sheet 1 and the lower insulating sheet 2, respectively. The surface of the connection between the connecting piece 3 and the upper insulating sheet 1 is smoothly transitioned, and the surface of the connection between the connecting piece 3 and the lower insulating sheet 2 is also smoothly transitioned, which is beneficial for the fabrication and assembly of the phase-to-phase insulating sheets. The thickness of the connecting piece 3, including the connecting rib 32, can also be the same as that of the upper insulating sheet 1 and the lower insulating sheet 2, facilitating integral molding.
[0044] In this embodiment, see Figure 1 and Figure 2 As a preferred design, the upper insulating sheet 1, lower insulating sheet 2, and connecting sheet 3 are made of the same material and are a single integrated structure. During processing, the phase insulating sheets can be integrally molded using a mold, and indentations 321 are pressed into the connecting rib 32 by extrusion, thus ensuring product dimensions and stable quality. The upper insulating sheet 1, lower insulating sheet 2, and connecting sheet 3 can be made of insulating materials such as polyethylene terephthalate (PET), polyimide (PI), polytetrafluoroethylene (PTFE), or polyethylene naphthalate (PEN), which have excellent insulation and wear resistance. Of course, other suitable materials can also be used.
[0045] In this embodiment, see Figure 1 and Figure 2 As a preferred design, the indentation protrusion 321 is V-shaped in cross-section perpendicular to the length direction of the connecting rib 32. This allows the flat strip-shaped connecting rib 32 to be compressed and deformed into a V-shape, thus obtaining the V-shaped indentation protrusion 321. The indentation protrusion 321 can also be arc-shaped or other shapes (such as trapezoidal) in cross-section perpendicular to the length direction of the connecting rib 32, as long as it is easy to manufacture and increases bending resistance.
[0046] This utility model also provides a motor including the above-mentioned interphase insulation sheets, see [link to relevant documentation]. Figure 3 The motor includes a stator core 4 and coil windings 5, etc. Multiple coaxially arranged coil windings 5 are provided at both ends of the stator core 4. The stator core 4 and coil windings 5 are conventional design structures. The upper insulating sheet 1 and the lower insulating sheet 2 of the phase-to-phase insulating sheet are located at both ends of the stator core 4 and are set between the two coil windings 5. The connecting piece 3 passes through the stator core 4 and is connected at both ends to the upper insulating sheet 1 and the lower insulating sheet 2. The connecting piece 3 can be set in the wire slot.
[0047] This utility model also provides an insulating sheet placement and handling device for placing and handling the aforementioned interphase insulating sheets, used for storing and handling interphase insulating sheets before assembly. See [link to relevant documentation]. Figure 4 and Figure 5 The insulating sheet placement and handling device includes a base plate 6, support rods 7, upper support blocks 8, and lower support blocks 9. There are two support rods 7, vertically fixed to the base plate 6. One upper support block 8 and one lower support block 9 are fixed to each support rod 7. When the interphase insulating sheet is placed in the device, the connecting piece 3 is located between the two support rods 7. The lower side of the upper insulating sheet 1 abuts against the upper sides of the two upper support blocks 8, and the upper side of the lower insulating sheet 2 abuts against the lower sides of the two upper support blocks 8. This ensures the interphase insulating sheet maintains a stable shape and a vertical position, preventing bending during placement and handling. This facilitates the robotic arm in picking up and placing the interphase insulating sheets from the device for assembly. Both the upper support block 8 and the lower support block 9 have appropriate lengths to hold multiple interphase insulating sheets. These sheets are stacked together and placed in the device, with adjacent sheets touching each other, and the innermost sheet resting against the two support rods 7.
[0048] As can be seen from the above, the phase-to-phase insulating sheet, the motor, and the insulating sheet placement and transport device of this utility model have the following beneficial effects:
[0049] 1. The connecting piece 3 of the phase-to-phase insulation sheet is equipped with multiple spaced connecting ribs 32 with indented protrusions 321, which enhances the bending resistance of the connecting ribs 32 and makes them less prone to bending. Therefore, with a fixed overall width, the connecting piece 3 can significantly improve the bending resistance. When the phase-to-phase insulation sheet is in an upright state, the connecting piece 3 is less prone to bending, ensuring that the phase-to-phase insulation sheet can maintain a good upright state, thus facilitating the installation of the phase-to-phase insulation sheet and overcoming the shortcomings of ordinary flat connecting strips in existing designs, which have poor hardness and are not resistant to bending. The phase-to-phase insulation sheet can be used for various motor stators and has good applicability and standardization.
[0050] 2. By setting the interphase insulation strips in this application, the motor can be easily automatically assembled, which is suitable for automated production and reduces labor costs. The interphase insulation strips can be well used for insulation isolation between adjacent coil windings 5 at both ends of the stator core 4 in the motor. The interphase insulation strips can be used for various motor stators and have good applicability and conventionality.
[0051] 3. By setting up an insulation sheet placement and handling device, it is possible to facilitate the vertical storage and handling of phase-to-phase insulation sheets, and to ensure that the phase-to-phase insulation sheets are in a good vertical position for retrieval and assembly.
[0052] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.
[0053] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. An interphase insulating sheet, comprising an upper insulating sheet (1), a lower insulating sheet (2), and a connecting piece (3), wherein the connecting piece (3) is connected to the upper insulating sheet (1) and the lower insulating sheet (2) at its two ends along the length direction, characterized in that: The connecting piece (3) includes a plurality of connecting ribs (32) arranged along the width direction and spaced apart, and there is a strip gap (31) between adjacent connecting ribs (32). The width of the strip gap (31) is 3 to 10 m, the width of the connecting rib (32) is 3 to 10 m, and the connecting rib (32) is provided with an indentation protrusion (321) protruding to one side, and the indentation protrusion (321) extends along the length direction of the connecting rib (32).
2. The phase-to-phase insulating sheet according to claim 1, characterized in that: The number of connecting ribs (32) of the connecting piece (3) is 3.
3. The phase-to-phase insulating sheet according to claim 1, characterized in that: The connecting ribs (32) in the connecting piece (3) are parallel to each other.
4. The phase-to-phase insulating sheet according to claim 1, characterized in that: The two ends of the indentation protrusion (321) are spaced from the upper insulating sheet (1) and the lower insulating sheet (2). The two ends of the connecting piece (3) have the same thickness as the upper insulating sheet (1) and the lower insulating sheet (2), respectively. The surface of the connecting piece (3) at the connection with the upper insulating sheet (1) is smoothly transitioned, and the surface of the connecting piece (3) at the connection with the lower insulating sheet (2) is smoothly transitioned.
5. The phase-to-phase insulating sheet according to claim 1, characterized in that: The upper insulating sheet (1), the lower insulating sheet (2), and the connecting sheet (3) are made of the same material and are an integral structure.
6. The phase-to-phase insulating sheet according to claim 5, characterized in that: The upper insulating sheet (1), lower insulating sheet (2) and connecting sheet (3) are made of polyethylene terephthalate, polyimide film, polytetrafluoroethylene film or polyethylene naphthalate.
7. The phase-to-phase insulating sheet according to claim 1, characterized in that: The indentation protrusion (321) is V-shaped or arc-shaped on the cross section perpendicular to the length direction of the connecting rib (32).
8. An electric motor, comprising a stator core (4) and coil windings (5), wherein multiple coaxially arranged coil windings (5) are provided at both ends of the stator core (4), characterized in that: It also includes the phase-to-phase insulating sheet as described in any one of claims 1 to 7, wherein the upper insulating sheet (1) and the lower insulating sheet (2) of the phase-to-phase insulating sheet are located at both ends of the stator core (4) and are disposed between the two coil windings (5), and the connecting piece (3) passes through the stator core (4).
9. An insulating sheet placement and handling device for placing and handling interphase insulating sheets as described in any one of claims 1 to 7, characterized in that: The insulating sheet placement and transport device includes a base plate (6), support rods (7), upper support blocks (8) and lower support blocks (9). There are two support rods (7), which are vertically fixed on the base plate (6). An upper support block (8) and a lower support block (9) are fixed on the support rods (7). When the phase insulating sheet is placed in the insulating sheet placement and transport device, the connecting piece (3) is located between the two support rods (7). The lower side of the upper insulating sheet (1) abuts against the upper side of the two upper support blocks (8), and the upper side of the lower insulating sheet (2) abuts against the lower side of the two upper support blocks (8).