Stator coil holder, stator structure and motor
By setting wire troughs and cross-line beams of different heights on the stator wire frame, the cross-bridge line arrangement of different phases is solved, the problem of cross-bridge line stacking is reduced, and the short circuit risk is simplified and the shaping process is simplified.
Patent Information
- Application Number
- CN202421822930.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-07-30
AI Technical Summary
During the concentrated winding process of existing wire frames, different phases of bridge lines are easily stacked on each other, causing the insulating layer of the enameled wire to age and fall off, increasing the risk of short circuit and difficulty in plastic surgery.
A stator wire frame is designed, using multiple winding parts to be evenly distributed on the inner circumference of the ring wall, and wire troughs of different heights are provided on the ring wall. By setting wire troughs and wire troughs of different heights, cross-bridge wires of different phases are arranged layered to avoid overlapping.
It effectively avoids the short circuit risk caused by aging and falling off of the insulating layer of the enameled wire, simplifies the shaping process, and improves the safety and reliability of the motor.
Smart Images
Figure CN223246369U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and in particular to a stator bobbin, a stator structure and a motor. Background Art
[0002] An electric motor (also known as a "motor") is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. It is usually composed of a rotor core and a stator. The rotor core can rotate inside the stator to convert energy.
[0003] The stator primarily consists of an iron core, a bobbin, and coil windings. The bobbin sits on the iron core, and the coils are wound around the bobbin and the iron core. The bobbin insulates the iron core from the coil windings. The coils also position the enameled wires and lead wires for shaping, providing the necessary electrical insulation and meeting the mechanical requirements of the wire-insertion equipment. Currently, during the centralized winding process, existing bobbin windings can cause bridge wires of different phases to overlap. If the insulation layer on the enameled wire ages or peels off during subsequent use, this can create a short circuit risk. Furthermore, the cluttered wiring can complicate shaping.
[0004] It should be noted that the information disclosed in this background technology section is only intended to increase understanding of the overall background of the present invention, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to those skilled in the art. Utility Model Content
[0005] In order to solve the technical problem of the above-mentioned bridge wires overlapping each other, the utility model provides a stator bobbin, which includes a winding part, an annular wall and a wire beam. The winding parts are multiple, and the multiple winding parts are spaced apart from each other and evenly distributed on the inner circumference of the annular wall. The annular wall is higher than the winding part. A first wire groove and a second wire groove are provided on the annular wall. The first wire groove and the second wire groove are at different heights.
[0006] The wire crossing beam is located on the outer peripheral side of the annular wall and protrudes from the annular wall. The wire crossing beam includes a first wire crossing beam and a second wire crossing beam. The height of the first wire crossing beam corresponds to the first wire groove, and the height of the second wire crossing beam corresponds to the second wire groove.
[0007] Furthermore, a third wire groove and a third wire beam are provided on the annular wall. The third wire groove is at a different height from the first wire groove and the second wire groove. The height of the third wire beam corresponds to that of the third wire groove.
[0008] Furthermore, the first wire trough includes a first wire trough wire inlet and a first wire trough wire outlet, and the first wire trough wire inlet and the first wire trough wire outlet are spaced apart and at the same height;
[0009] The second wire trough comprises a second wire trough wire inlet and a second wire trough wire outlet, wherein the second wire trough wire inlet and the second wire trough wire outlet are spaced apart and are at the same height;
[0010] The third wire trough includes a third wire trough wire inlet and a third wire trough wire outlet, and the third wire trough wire inlet and the third wire trough wire outlet are spaced apart and at the same height.
[0011] Furthermore, the first wire trough wire entrance, the second wire trough wire entrance and the third wire trough wire entrance are all U-shaped, and the first wire trough wire entrance, the second wire trough wire entrance and the third wire trough wire entrance are all designed with rounded corners.
[0012] Furthermore, the first wire trough outlet, the second wire trough outlet and the third wire trough outlet are all V-shaped, and the first wire trough outlet, the second wire trough outlet and the third wire trough outlet are all designed with rounded corners.
[0013] Furthermore, the first crossing beam, the second crossing beam and the third crossing beam are all inclined downward by 5°-10°.
[0014] Furthermore, the lowest point of the first wire beam is higher than the lowest point of the first wire trough, and the highest point of the first wire beam is not higher than the highest point of the first wire trough;
[0015] The lowest point of the second wire beam is higher than the lowest point of the second wire trough, and the highest point of the second wire beam is not higher than the highest point of the second wire trough;
[0016] The lowest point of the third wire crossing beam is higher than the lowest point of the third wire trough, and the highest point of the third wire crossing beam is not higher than the highest point of the third wire trough.
[0017] Furthermore, the first crossing beam, the second crossing beam and the third crossing beam are all cylinders or rounded rectangular parallelepipeds.
[0018] Furthermore, the stator bobbin further includes a plurality of positioning portions, which are arranged on the outer circumference of the annular wall at intervals and located at the bottom of the outer circumference of the annular wall.
[0019] Furthermore, the present invention also provides a stator structure, comprising any one of the stator bobbins described above;
[0020] The stator structure further includes an iron core, a rear bobbin and a coil. The stator bobbin and the rear bobbin are respectively arranged at both ends of the iron core. The iron core has a positioning groove, which is movably connected to the positioning part. The coil is wound on the winding part.
[0021] Furthermore, the height h of the first crossing beam, the second crossing beam, and the third crossing beam protruding from the annular wall is expressed as:
[0022] h=D*B
[0023] Wherein, D is the wire diameter of the coil, and B is the reserved margin coefficient.
[0024] Furthermore, the vertical distance L1 between the first crossing beam and the second crossing beam is expressed as:
[0025] L1≥A+D
[0026] Then the vertical distance L2 between the second crossing beam and the third crossing beam is expressed as:
[0027] L2≥A+D
[0028] Wherein, A is the minimum safe creepage distance, and D is the wire diameter of the coil.
[0029] Furthermore, the present invention also provides a motor comprising any one of the stator structures described above.
[0030] Based on the above, the stator bobbin, stator structure and motor provided by the present invention, compared with the prior art, can arrange the bridge wires of different phases in intervals and layers during the centralized winding process by setting wire grooves of different heights on the ring wall, so that the bridge wires of different phases will not overlap with each other, avoiding the risk of short circuit caused by aging or falling off of the insulation layer on the surface of the enameled wire during subsequent use, and is also conducive to shaping. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. The positional relationships described in the drawings in the following description are based on the directions of the components in the drawings unless otherwise specified.
[0032] Figure 1 A schematic diagram of the three-dimensional structure of a stator bobbin provided in one embodiment of the present utility model;
[0033] Figure 2 A schematic structural diagram of a ring wall provided in one embodiment of the present utility model;
[0034] Figure 3 This is a structural schematic diagram of a stator structure provided in one embodiment of the present utility model.
[0035] Reference numerals:
[0036] 100- stator bobbin 200- iron core 300- rear bobbin
[0037] 400-coil 10-winding part 20-ring wall
[0038] 30-first line slot 40-second line slot 50-third line slot
[0039] 60-crossing beam 70-positioning portion 31-first wire trough entrance
[0040] 32-first wire trough outlet 41-second wire trough inlet 42-second wire trough outlet
[0041] 51-the third wire trough inlet 52-the third wire trough outlet 61-the first wire beam
[0042] 62-Second crossing beam 63-Third crossing beam DETAILED DESCRIPTION
[0043] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.
[0044] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variations thereof all mean "at least including".
[0045] See also Figure 1 and Figure 2, Figure 1 A schematic diagram of the three-dimensional structure of a stator bobbin provided in one embodiment of the present utility model; Figure 2 This is a schematic structural diagram of a ring wall provided in one embodiment of the present utility model.
[0046] To solve the technical problem of overlapping bridge wires of different phases, or to achieve at least one of the aforementioned advantages or other advantages, an embodiment of the present invention provides a stator bobbin. As shown in the figure, the stator bobbin 100 includes a winding portion 10 and an annular wall 20.
[0047] There are multiple winding sections 10, each spaced apart and evenly distributed on the inner circumference of the annular wall 20. Specifically, the number and placement of the winding sections 10 can be adjusted based on the stator core used in a specific application. The number and placement of the winding sections 10 need to correspond to the stator core, and this is not a limitation in this application.
[0048] The annular wall 20 is vertically connected to the plurality of winding parts 10 and is higher than the winding parts 10. A first wire groove 30 and a second wire groove 40 are provided on the annular wall 20. In a specific implementation, the first wire groove 30 and the second wire groove 40 are at different heights on the annular wall 20. By arranging the first wire groove 30 and the second wire groove 40 at different heights, during the centralized winding process, the winding nozzle can wind the enameled wires of different phases on the first wire groove 30 and the second wire groove 40 at different heights, so that the enameled wires of different phases are spaced apart from each other. They will not overlap with each other, avoiding the risk of short circuit caused by aging or shedding of the insulation layer on the surface of the enameled wire during subsequent use, and is also conducive to shaping.
[0049] The stator bobbin 100 of the above embodiment can be used in a two-phase motor. In a preferred embodiment, when the stator bobbin 100 is used in a three-phase motor, a third wire slot 50 is further provided on the annular wall 20. The height of the third wire slot 50 on the annular wall 20 is different from that of the first wire slot 30 and the second wire slot 40. That is, the first wire slot 30, the second wire slot 40, and the third wire slot 50 are all at different heights, with a height difference between them.
[0050] During the centralized winding process, the winding nozzle can wind enameled wires of different phases onto the first, second, and third wire slots 30, 40, 50 at different heights, ensuring that the enameled wires of different phases are spaced apart from each other and do not overlap. This avoids the risk of short circuits caused by aging or shedding of the insulation layer on the enameled wire surface during subsequent use, and also facilitates shaping.
[0051] It should be understood that the height difference between the first wire groove 30 , the second wire groove 40 and the third wire groove 50 is greater than the sum of the diameter of the wound enameled wire and the corresponding minimum safe creepage distance.
[0052] Based on the above, the stator bobbin 100 further includes a wire guide beam 60. The wire guide beam 60 is located on the outer periphery of the annular wall 20 and protrudes from the annular wall 20. Specifically, the wire guide beam 60 includes a first wire guide beam 61, a second wire guide beam 62, and a third wire guide beam 63. The height of the first wire guide beam 61 corresponds to the height of the first wire trough 30. The height of the second wire guide beam 62 corresponds to the height of the second wire trough 40. The height of the third wire guide beam 63 corresponds to the height of the second wire trough 50.
[0053] During the centralized winding process, when the winding nozzle guides the enameled wire out of the annular wall 20 for routing across the bridge, the wire guide beam 60 can hold the enameled wire when different phases of enameled wire are led out of the first wire groove 30, the second wire groove 40, or the third wire groove 50 at different heights, preventing the wire from derailing. Furthermore, the different heights of the first wire guide beam 61, the second wire guide beam 62, and the third wire guide beam 63 further isolate the enameled wires of different phases, greatly reducing the complexity of the winding process.
[0054] In some preferred embodiments, the first wire trough 30 includes a first wire trough inlet 31 and a first wire trough outlet 32. The first wire trough inlet 31 and the first wire trough outlet 32 are spaced apart and at the same height. This ensures that the enameled wires crossing the bridge wires from the first wire trough 30 are at the same level and do not overlap with the enameled wires of other phases.
[0055] The second wire trough 40 includes a second wire trough inlet 41 and a second wire trough outlet 42. The second wire trough inlet 41 and the second wire trough outlet 42 are spaced apart and at the same height. This ensures that the enameled wires crossing the bridge wires from the second wire trough 40 are at the same level and do not overlap with the enameled wires of other phases.
[0056] The third wire trough 50 includes a third wire trough inlet 51 and a third wire trough outlet 52. The third wire trough inlet 51 and the third wire trough outlet 52 are spaced apart and at the same height. This ensures that the enameled wires crossing the bridge wires from the third wire trough 50 are at the same level and do not overlap with the enameled wires of other phases.
[0057] It should be noted that, in specific implementation, a first wire crossing beam 61 needs to be provided at each of the first wire duct inlet 31 and the first wire duct outlet 32. Furthermore, based on the specific spanning direction of the bridge line, the first wire crossing beam 61 should be provided on the inner side of the first wire duct inlet 31 and the first wire duct outlet 32. The same applies to the second wire crossing beam 62 and the third wire crossing beam 63.
[0058] On the basis of the above, the first wire slot inlet 31, the second wire slot inlet 41, and the third wire slot inlet 51 are all U-shaped, which facilitates the winding nozzle to pass through the winding part 10 to wind the wire. The first wire slot inlet 31, the second wire slot inlet 41, and the third wire slot inlet 51 are all designed with rounded corners to prevent the winding nozzle from scratching the insulation layer on the surface of the enameled wire during the process of introducing the enameled wire, thereby improving the insulation performance and service life of the enameled wire.
[0059] Furthermore, the first, second, and third wire slot outlets 32, 42, and 52 are all V-shaped. When the winding nozzle draws the enameled wire out of the first, second, or third wire slot outlets 32, 42, or 52, the enameled wire can be accurately positioned even if the nozzle's position deviates. The first, second, and third wire slot outlets 32, 42, and 52 all have rounded corners to prevent the nozzle from scratching the insulation layer on the enameled wire surface during the drawing process, thereby improving the insulation and service life of the enameled wire.
[0060] In some preferred embodiments, the first wire beam 61, the second wire beam 62 and the third wire beam 63 are all tilted downward by 5°-10°. When the winding nozzle leads the enameled wire from the first wire trough outlet 32, the second wire trough outlet 42 or the third wire trough outlet 52, the downward-tilted first wire beam 61, the second wire beam 62 and the third wire beam 63 can better clamp the enameled wire and prevent it from falling off. Further reduce the difficulty of shaping between enameled wires of different phases. Of course, in some other embodiments, the first wire beam 61, the second wire beam 62 and the third wire beam 63 can be straight as a whole, with the ends tilted downward by 5°-10°. As long as they can prevent the wire from falling off, they are all within the scope of protection of this application.
[0061] In some preferred embodiments, the lowest point of the first wire guide 61 is higher than the lowest point of the first wire slot 30, ensuring sufficient space for the winding nozzle to introduce or extract the enameled wire. The highest point of the first wire guide 61 is no higher than the highest point of the first wire slot 30. This controls the height of the annular wall 20 while ensuring sufficient safe creepage distance, improves the overall strength of the stator bobbin 100, and prevents excessive deformation of the stator bobbin 100 during wire routing by the winding nozzle.
[0062] The lowest point of the second wire guide 62 is higher than the lowest point of the second wire trough 40, ensuring sufficient space for the winding nozzle to introduce or extract the enameled wire. The highest point of the second wire guide 62 is no higher than the highest point of the second wire trough 40, controlling the height of the annular wall 20 while ensuring sufficient safe creepage distance.
[0063] The lowest point of the third wire guide 63 is higher than the lowest point of the third wire trough 50, ensuring sufficient space for the winding nozzle to introduce or extract the enameled wire. The highest point of the third wire guide 63 is no higher than the highest point of the third wire trough 50, controlling the height of the annular wall 20 while ensuring sufficient safe creepage distance.
[0064] In some preferred embodiments, the first wire-crossing beam 61, the second wire-crossing beam 62, and the third wire-crossing beam 63 are all cylindrical or rounded rectangular parallelepiped, which can better prevent the insulating layer on the surface of the enameled wire from being scratched, thereby improving the insulation performance and service life of the enameled wire.
[0065] In some preferred embodiments, the stator bobbin 100 further includes a plurality of positioning portions 70. These positioning portions 70 are spaced apart and disposed on the outer periphery of the annular wall 20 and are located at the bottom of the outer periphery of the annular wall 20. In practice, the positioning portions 70 secure the stator bobbin to the stator core.
[0066] Please combine Figure 1 See Figure 3 In some preferred embodiments, the present invention further provides a stator structure, comprising the above-mentioned stator bobbin 100 .
[0067] The stator structure also includes an iron core 200, a rear bobbin 300, and a coil 400. The stator bobbin 100 and rear bobbin 300 are respectively disposed at opposite ends of the iron core 200. The iron core has a positioning slot (not shown) that is movably connected to the positioning portion 70. The coil 400 is wound around the winding portion 10.
[0068] In some preferred embodiments, the height h of the first crossing beam 61, the second crossing beam 62, and the third crossing beam 63 protruding from the annular wall 20 is expressed as:
[0069] h=D*B
[0070] Where D is the wire diameter of the coil, and B is the margin factor. This facilitates winding the enameled wire with the winding nozzle. Of course, in practice, the margin factor can be customized based on various factors, including equipment, process, and manufacturing. The specific value can range from 1.2 to 1.5, with 1.3 being the preferred value in this embodiment.
[0071] In some preferred embodiments, the vertical distance L1 between the first crossing beam 61 and the second crossing beam 62 is expressed as:
[0072] L1≥A+D
[0073] Then the vertical distance L2 between the second crossing beam 62 and the third crossing beam 63 is expressed as:
[0074] L2≥A+D
[0075] Where A is the minimum safe creepage distance, and D is the wire diameter of the coil. In practice, the corresponding minimum safe creepage distance can be calculated based on the motor voltage, thereby determining the safe distance (vertical distance) between the first wire beam 61, the second wire beam 62, and the third wire beam 63, thereby greatly improving the versatility of the stator bobbin 100.
[0076] In some preferred embodiments, the present invention further provides a motor comprising the above-mentioned stator structure.
[0077] To sum up, compared with the prior art, the stator bobbin, stator structure and motor provided by the present invention have wire grooves of different heights set on the ring wall. During the centralized winding process, the bridge wires of different phases can be arranged in intervals and layers, so that the bridge wires of different phases will not overlap with each other, avoiding the risk of short circuit caused by aging or falling off of the insulation layer on the surface of the enameled wire during subsequent use, and is also conducive to shaping.
[0078] Although terms such as "cable duct" and "cable beam" are frequently used in this document, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.
[0079] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention may be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background art at the same time. Those skilled in the art should understand that the absence of any content in a claim should not be construed as a limitation on that claim.
[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A stator bobbin, characterized in that: include a winding portion, wherein the winding portion is multiple; An annular wall, wherein the plurality of winding portions are spaced apart from each other and evenly distributed on an inner circumference of the annular wall, the annular wall is higher than the winding portions, and a first wire groove and a second wire groove are provided on the annular wall, wherein the first wire groove and the second wire groove are at different heights; A wire beam, the wire beam being located on the outer peripheral side of the annular wall and protruding from the annular wall, the wire beam comprising a first wire beam and a second wire beam, the height of the first wire beam corresponding to the first wire groove, and the height of the second wire beam corresponding to the second wire groove; Among them, the lowest point of the first crossing beam is higher than the lowest point of the first wire trough, and the highest point of the first crossing beam is not higher than the highest point of the first wire trough; the lowest point of the second crossing beam is higher than the lowest point of the second wire trough, and the highest point of the second crossing beam is not higher than the highest point of the second wire trough.
2. The stator bobbin according to claim 1, characterized in that: A third wire groove and a third wire beam are further provided on the annular wall. The third wire groove is at a different height from the first wire groove and the second wire groove. The height of the third wire beam corresponds to that of the third wire groove.
3. The stator bobbin according to claim 2, characterized in that: The first wire trough comprises a first wire trough inlet and a first wire trough outlet, wherein the first wire trough inlet and the first wire trough outlet are spaced apart and at the same height; The second wire trough comprises a second wire trough wire inlet and a second wire trough wire outlet, wherein the second wire trough wire inlet and the second wire trough wire outlet are spaced apart and are at the same height; The third wire trough includes a third wire trough wire inlet and a third wire trough wire outlet, and the third wire trough wire inlet and the third wire trough wire outlet are spaced apart and at the same height.
4. The stator bobbin according to claim 3, characterized in that: The first wire trough wire entrance, the second wire trough wire entrance and the third wire trough wire entrance are all U-shaped, and the first wire trough wire entrance, the second wire trough wire entrance and the third wire trough wire entrance are all designed with rounded corners.
5. The stator bobbin according to claim 3, characterized in that: The first wire trough outlet, the second wire trough outlet and the third wire trough outlet are all V-shaped, and the first wire trough outlet, the second wire trough outlet and the third wire trough outlet are all rounded.
6. The stator bobbin according to claim 2, characterized in that: The first crossing beam, the second crossing beam and the third crossing beam are all inclined downward by 5°-10°.
7. The stator bobbin according to claim 6, characterized in that: The lowest point of the third wire crossing beam is higher than the lowest point of the third wire trough, and the highest point of the third wire crossing beam is not higher than the highest point of the third wire trough.
8. The stator bobbin according to claim 2, characterized in that: The first crossing beam, the second crossing beam and the third crossing beam are all cylindrical or rounded rectangular parallelepiped.
9. The stator bobbin according to claim 1, characterized in that: The stator bobbin further includes a plurality of positioning portions, which are arranged on the outer circumference of the annular wall at intervals and located at the bottom of the outer circumference of the annular wall.
10. A stator structure, characterized in that: Comprising the stator bobbin according to any one of claims 1 to 9; The stator structure further includes an iron core, a rear bobbin and a coil. The stator bobbin and the rear bobbin are respectively arranged at both ends of the iron core. The iron core has a positioning groove, which is movably connected to the positioning part. The coil is wound on the winding part.
11. The stator structure according to claim 10, characterized in that: The height of the first wire beam, the second wire beam and the third wire beam protruding from the annular wall Expressed as: in, is the wire diameter of the coil, It is the reserve margin factor.
12. The stator structure according to claim 10, characterized in that: The vertical distance between the first crossing beam and the second crossing beam Expressed as: Then the vertical distance between the second crossing beam and the third crossing beam is Expressed as: in, is the minimum safe creepage distance, is the wire diameter of the coil.
13. A motor, characterized in that: The invention comprises the stator structure according to any one of claims 10 to 12.