Stator core structure, motor and vehicle
By combining the insertion positioning part with the pressure plate, the problem of the stator core end laminations springing open at high temperatures is solved, achieving the effects of simplifying the process, reducing costs, and improving efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HYCET TRANSMISSION TECH HEBEI CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-14
Smart Images
Figure CN224502993U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of new energy vehicle technology, and more specifically, relates to a stator core structure, a motor, and a vehicle. Background Technology
[0002] With increasing awareness of green environmental protection, new energy vehicles are gradually taking over the market. For these vehicles, the performance of the power battery and motor is crucial. In the manufacturing process of the stator for new energy vehicle motors, a winding varnishing process is required to improve insulation performance.
[0003] Currently, the stator winding coating process requires heating the stator to a high temperature to ensure effective coating and curing. However, in high-temperature environments, the lamination teeth at the ends of the stator core are prone to springing and lifting. To avoid this phenomenon, structural adhesive is commonly used to bond and fix the end laminations. However, this method is not only technically challenging and costly, but also inefficient. Therefore, a new solution is needed. Utility Model Content
[0004] The purpose of this application is to provide a stator core structure that solves the problem that the laminations at the ends of the stator core are prone to springing apart at high temperatures, and simplifies the stator manufacturing process and improves efficiency.
[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: Firstly, embodiments of this application provide a stator core structure, comprising:
[0006] The iron core body is composed of several iron core laminations stacked together. Each iron core lamination has several lamination teeth distributed at intervals along its circumference. The lamination teeth of each iron core lamination are aligned to form the winding portion of the iron core body. At least one layer of iron core laminations located at both ends of the iron core body serves as a connector. Each connector is provided with a first insertion positioning portion.
[0007] Both pressure plates are provided with a second insertion positioning part. The two pressure plates are pressed against the two ends of the iron core body and are fixed by the second insertion positioning part corresponding to the first insertion positioning part.
[0008] The pressure plate has at least an abutting portion that can press against each of the stacked teeth.
[0009] Compared with the prior art, the solution shown in this application embodiment has several iron core laminations stacked together to form an iron core body, which can reduce eddy current losses and improve motor efficiency. The circumferentially distributed lamination teeth on each iron core lamination can be aligned to form a winding part for winding the coil, which not only provides winding space, but also improves the stability of the stacked structure of the iron core laminations by utilizing the binding force of the wound coil.
[0010] A connecting body with a connecting function is formed by providing a first insertion positioning part on at least one layer of core laminations at the end of the core body. The pressure plate can be fastened to the connecting body by the insertion and engagement of the second insertion positioning part and the first insertion positioning part. The abutting part on the pressure plate applies a resisting pressure to the lamination teeth distributed on the core laminations at the end of the core body, thereby preventing the lamination teeth from springing open and warping when the stator temperature is high.
[0011] The assembly method of the pressure plate and the connector adopts the mutual insertion and cooperation of the first insertion positioning part and the second insertion positioning part. Compared with the existing technology of using structural adhesive to bond the iron core laminations, it is not only simpler in terms of process and can save the cost of adhesive materials, but also easier and more convenient to operate, which is conducive to improving production efficiency.
[0012] In conjunction with the first aspect, in one possible implementation, the two layers of core laminations located at the ends of the core body are respectively a first lamination and a second lamination, the first lamination being located between the pressure plate and the second lamination, and the two together forming the connecting body;
[0013] The first insertion positioning part includes an insertion hole disposed on the first stack and a positioning hole disposed on the second stack;
[0014] The second insertion positioning part includes a buckle that passes through the insertion hole and engages with the periphery of the insertion hole, and the portion of the buckle that passes through the insertion hole extends into the positioning hole.
[0015] In the above technical solution, the two layers of iron core laminations located at the ends of the iron core body are used together as a connecting body, thereby avoiding the problem that the insufficient thickness of a single layer of iron core laminations affects the fastening firmness of the pressure plate. For ease of description, the outermost iron core lamination is defined as the first lamination, and the iron core lamination adjacent to the first lamination is defined as the second lamination, that is, the pressure plate directly presses against the first lamination.
[0016] Because the thickness of the single-layer iron core laminations is small, the buckle is inserted through the insertion hole on the first lamination and snapped onto the surface of the first lamination away from the pressure plate and located around the insertion hole. This achieves the buckling and fixing of the pressure plate on the first lamination. At the same time, in order to avoid interference between the part of the buckle that passes through the insertion hole and the second lamination, a positioning hole is provided on the second lamination for the end of the buckle to extend into, thereby ensuring the tight fit between the first and second laminations.
[0017] In addition, the size of the positioning hole matches the part of the buckle that extends into it, thereby enabling the two to form an interlocking fit. This allows the buckle to both fix the pressure plate along the axial direction of the iron core body and restrict the degree of freedom of the pressure plate to rotate circumferentially relative to the iron core body, thereby improving the pressure plate's pressing stability on the first stack of plates and preventing the stack teeth on the first stack of plates from springing open and lifting.
[0018] In some embodiments, the first stack is provided with the positioning hole; the second insertion positioning part further includes a positioning pin, which is inserted into the positioning hole on the first stack.
[0019] In the above technical solution, considering that there is usually a wobble gap in the snap-fit, even if the snap-fit is inserted into the positioning hole on the second stack to form an interlocking fit, it is still impossible to completely eliminate the assembly gap. Therefore, positioning holes and positioning pins are set on the first stack for insertion fit. In this way, the snap-fit can be used to snap the first stack to make the pressure plate form an axial pressure on the first stack. At the same time, the positioning pin is used to tightly insert into the positioning hole to form a radial positioning constraint on the pressure plate, thereby improving the snap-fit stability of the pressure plate.
[0020] For example, both the first lamination and the second lamination are provided with a plurality of insertion holes and a plurality of positioning holes. The insertion holes and the positioning holes are alternately distributed along the circumference of the iron core body, and the insertion holes on one of the first lamination and the positioning holes on the other lamination are aligned one by one.
[0021] The second insertion positioning part includes a plurality of buckles and a plurality of positioning pins that are alternately distributed along the circumference of the iron core body. Each buckle passes through the insertion hole of the first lamination and extends into the positioning hole of the second lamination. Each positioning pin is inserted into each positioning hole of the first lamination.
[0022] In the above technical solution, the first and second laminations adopt the same structure, which improves the consistency and commonality of parts processing, thereby reducing processing and maintenance costs. During assembly, the first and second laminations are simply rotated relative to each other until the insertion hole of the first lamination is aligned with the positioning hole of the second lamination, and the positioning hole of the first lamination is aligned with the insertion hole of the second lamination. This allows the buckle to pass through the insertion hole of the first lamination and engage with the part of the first lamination facing away from the pressure plate, extending into the positioning hole. At the same time, the positioning pin directly engages with the positioning hole of the first lamination, which improves the assembly convenience and efficiency of the iron core body.
[0023] In addition, the positioning holes and insertion holes are distributed in a cross-spaced manner and cooperate with the corresponding buckles and positioning pins. This allows the pressure plate to be evenly stressed in the circumferential direction, thereby improving the uniformity and reliability of the pressure plate's resistance to the first stack of pieces and avoiding the problem of insufficient local resistance of the pressure plate to the first stack of pieces, which would cause the stack teeth in that area to spring open at high temperature.
[0024] For example, the positioning pin includes a large diameter section and a small diameter section; the large diameter section is inserted into the positioning hole on the first lamination, and the small diameter section is inserted into the insertion hole on the second lamination.
[0025] In the above technical solution, since the size of the positioning hole is larger than that of the insertion hole, the end of the buckle can engage with the part of the first stacked piece located around the insertion hole and extend into the positioning hole. On this basis, the small diameter section of the positioning pin can smoothly pass through the positioning hole of the first stacked piece and engage with the insertion hole of the second stacked piece, while the large diameter section directly engages tightly with the positioning hole on the first stacked piece. This allows full use of the insertion hole on the second stacked piece for connection and positioning. Moreover, the positioning holes and insertion holes of the first and second stacked pieces can engage with the same positioning pin. This not only improves the fastening stability of the pressure plate, but also provides radial positioning for the first and second stacked pieces, improving the stacking reliability of the first and second stacked pieces. This is beneficial to further improve the state stability of the first stacked piece and avoid the problem of the stacked teeth of the first stacked piece springing open and warping at high temperature.
[0026] In one possible implementation, the buckle has an opening groove at its center, and the buckle forms wedge buckles on both sides of the opening groove. The wedge buckles are used to engage the portion of the first stacked piece located around its insertion hole and extend into the positioning hole.
[0027] In the above technical solution, the buckle needs to pass through the insertion hole and form a snap-fit with the periphery of the insertion hole of the first stack. Therefore, the size of the head end of the buckle needs to be larger than the size of the insertion hole. In order to enable the head end of the buckle to pass through the insertion hole smoothly, an opening groove is provided in the center of the buckle. When the buckle passes through the insertion hole, it is squeezed and elastically deforms into the opening groove, thereby causing the head end of the buckle to contract and pass through the insertion hole. After passing through, the insertion hole no longer exerts a squeezing force on the buckle. Therefore, the head end of the buckle opens and resets based on its own toughness or elasticity, thereby realizing the snap-fit between the buckle and the periphery of the insertion hole.
[0028] The buckle is located on both sides of the opening of the slot, with wedges as the head end of the buckle. When the buckle passes through the insertion hole, the wedge surface of the wedge contacts the hole wall and drives the two wedges to gradually approach each other. After the entire wedge passes through the insertion hole, it opens again and forms a snap-fit with the surrounding part of the insertion hole. This not only has a simple structure and facilitates the assembly of the pressure plate, but also improves the snap-fit stability of the buckle on the first stack of plates.
[0029] In some embodiments, the pressure plate has teeth that correspond one-to-one with each of the stacked teeth, the teeth acting as at least a portion of the abutting portion against the stacked teeth.
[0030] In the above technical solution, the pressure plate can adopt the same outline boundary as the iron core lamination, or the part of the pressure plate corresponding to the lamination teeth is consistent with the outline boundary of the iron core lamination. In this way, the part of the pressure plate corresponding to the lamination teeth forms a ring of plate teeth. The pressing action of the plate teeth on the lamination teeth is used to prevent the lamination teeth from springing open and warping when the temperature rises.
[0031] In some possible implementations, the pressure plate has an annular groove on its surface facing the iron core body, and the abutting portion is formed on both sides of the annular groove of the pressure plate.
[0032] In the above technical solution, since the surface area of the iron core laminations is large, it is difficult to ensure the fit when the pressure plate directly presses against the iron core laminations with a flat surface. Therefore, an annular groove is opened on the pressure plate to reduce the contact area between the pressure plate and the iron core laminations. This ensures that the pressure plate can reliably press against the iron core laminations in the circumferential direction. In particular, the part on the side of the annular groove is used as the abutment part to improve the pressing effect of the pressure plate on the lamination teeth, thereby avoiding the problem of the lamination teeth springing open and lifting after being heated.
[0033] Secondly, embodiments of this application also provide an electric motor, including the stator core structure described above.
[0034] The motor provided in this application embodiment, compared with the prior art, adopts the stator core structure described above. The abutting portion on the pressure plate applies pressure to the lamination teeth distributed on the core body ends, preventing the lamination teeth from springing open and warping when the stator temperature is high. The assembly method of the pressure plate and the connecting body adopts a mutual insertion and engagement of the first and second insertion positioning portions. Compared with the prior art's method of bonding the core laminations with structural adhesive, this method is not only simpler in process and saves on adhesive material costs, but also easier and more convenient to operate, thus improving production efficiency.
[0035] Thirdly, embodiments of this application also provide a vehicle including the aforementioned motor.
[0036] Compared with the prior art, the vehicle provided in this application adopts a motor with the above-mentioned stator core structure, which can simplify the manufacturing process of the stator core, reduce costs, avoid the problem of the lamination teeth springing open and warping due to high temperature during the assembly and manufacturing process of the stator core, and improve production efficiency. Attached Figure Description
[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0038] Figure 1 This is a three-dimensional structural diagram of the stator core structure provided in the embodiments of this application;
[0039] Figure 2 This is an exploded structural diagram of the stator core structure provided in the embodiments of this application;
[0040] Figure 3 This is a front view schematic diagram of the core lamination structure used in the embodiments of this application;
[0041] Figure 4 This is a schematic diagram of the connection structure between the pressure plate and the connector used in the embodiments of this application;
[0042] Figure 5 for Figure 4 Enlarged structural diagram at point A;
[0043] Figure 6 This is a front view of the structure of the first stack of laminations used in the embodiments of this application;
[0044] Figure 7 This is a three-dimensional structural diagram of the pressure plate used in the embodiments of this application;
[0045] Figure 8 for Figure 7 Enlarged structural diagram at point B;
[0046] Figure 9 for Figure 7 Enlarged structural diagram at point C;
[0047] Figure 10 This is a schematic diagram of the cooperation structure between the first insertion positioning part and the second insertion positioning part in one embodiment of this application;
[0048] Figure 11 This is a schematic diagram of the cooperation structure between the first insertion positioning part and the second insertion positioning part in another embodiment of this application;
[0049] Figure 12 This is a schematic diagram of the cooperation structure between the first insertion positioning part and the second insertion positioning part in another embodiment of this application.
[0050] In the diagram: 10. Core body; 100. Core laminations; 101. Lamination teeth; 11. Winding section; 12. Connector; 120. First insertion positioning section; 1201. Insertion hole; 1202. Positioning hole; 121. First lamination; 122. Second lamination; 20. Pressure plate; 21. Abutting section; 22. Second insertion positioning section; 221. Snap fastener; 2211. Opening groove; 2212. Wedge buckle; 222. Positioning pin; 2221. Large diameter section; 2222. Small diameter section; 23. Plate teeth; 24. Annular groove. Detailed Implementation
[0051] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0052] It should be noted that when an element is referred to as being "located on" another element, it can be directly on the other element or indirectly on the other element. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a number" means two or more, unless otherwise explicitly specified.
[0053] In the existing technology, the structural adhesive bonding method is usually adopted to address the problem of stator core lamination assembly. The disadvantage of this method is that the material cost is high and the process is complicated. Ordinary motors also use the method of applying tension force to the lamination by passing the entire stator core through the tension bolts. However, this method occupies structural space because the two ends of the tension bolts pass through the stator core, so it is not suitable for motors with high requirements for space and precision.
[0054] Please refer to the following: Figures 1 to 12 The stator core structure provided in this application will now be described. The stator core structure includes a core body 10 and two pressure plates 20.
[0055] The iron core body 10 is formed by stacking a number of iron core laminations 100. Each iron core lamination 100 has a number of lamination teeth 101 distributed circumferentially. The lamination teeth 101 of each iron core lamination 100 are aligned to form the winding portion 11 of the iron core body 10. At least one layer of iron core laminations 100 located at both ends of the iron core body 10 serves as a connector 12. Each connector 12 is provided with a first insertion positioning portion 120.
[0056] It should be noted that the iron core body 10 adopts a structure formed by stacking iron core laminations 100. By taking insulation measures such as applying insulating glue between the iron core laminations 100, the eddy current flow path between the iron core laminations 100 can be restricted, thereby reducing the eddy current loss of the iron core body 10 under alternating magnetic field, and also helping to reduce hysteresis loss.
[0057] It should be understood that the motor stator is usually encircled by the motor rotor, so the motor stator is usually cylindrical. The motor stator can be considered as the general term for the stator core and the stator winding. Therefore, the core laminations 100 used to form the core body 10 are annular metal sheets. On this basis, since the stator winding is a coil wound on the stator core, the core body 10 needs to provide a winding portion 11 for winding the coil. In order to ensure that the stator core has a rotation space suitable for the rotation of the motor rotor, the stator core should have a stator slot suitable for the stator winding to be embedded. Based on this requirement, a ring of lamination teeth 101 on the core laminations 100 can be used to form a ring of winding portion 11 for winding the coil after the stacking is completed. Stator slots that can accommodate the coil are formed between adjacent winding portions 11.
[0058] It should be explained that the outermost core laminations 100 at both ends of the core body 10 can serve as connectors 12, or, considering the small thickness of the core laminations 100, two or more core laminations 100 can serve as connectors 12 together. Here, the first insertion positioning part 120 can be a circular, polygonal, or other irregularly shaped hole or slot.
[0059] Both pressure plates 20 are provided with a second insertion positioning part 22. The two pressure plates 20 are pressed against the two ends of the iron core body 10 and are fixed by corresponding insertion of the second insertion positioning part 22 and the first insertion positioning part 120. The pressure plate 20 has at least an abutting part 21 that can press against each lamination tooth 101.
[0060] The second insertion positioning part 22 is specifically a cylindrical body with a circular, polygonal or other irregular structure that matches the first insertion positioning part 120. Considering that the spring-opening and tilting of the lamination teeth 101 mainly generates an axial force along the iron core body 10 on the pressure plate 20, the second insertion positioning part 22 and the first insertion positioning part 120 can form a mutual axial positioning constraint on each other based on the insertion. For example, the two adopt an interference fit or additional ribs and grooves to form a snap-fit limiting structure.
[0061] In this embodiment, the pressure plate 20 can be pressed against the surface of the connector 12 as a whole, or the abutment part 21 can be provided to apply pressure to the stacked teeth 101. Considering that the front of the pressure plate 20 is too large to press against the connector 12, it may affect the tightness of the fit. Therefore, it is preferable to use a part of the surface of the pressure plate 20 corresponding to the stacked teeth 101 as the abutment part 21, and other parts form a gap with the connector 12. In this way, the force generated by the second insertion positioning part 22 and the first insertion positioning part 120 after insertion and engagement can make the abutment part 21 press against each stacked tooth 101 in a circumferential manner, thereby avoiding the situation where the stacked teeth 101 in some places spring open and lift up at high temperature due to insufficient pressure.
[0062] Compared with the prior art, the stator core structure provided in this application forms a connecting body 12 with a connecting function by providing a first insertion positioning part 120 on at least one layer of core laminations 100 at the end of the core body 10. Thus, the pressure plate 20 can be fastened to the connecting body 12 by the insertion and engagement of the second insertion positioning part 22 with the first insertion positioning part 120. In this way, the abutting part 21 on the pressure plate 20 applies a resisting pressure to the lamination teeth 101 distributed on the core laminations 100 at the end of the core body 10, thereby preventing the lamination teeth 101 from springing open and warping when the stator core temperature is high.
[0063] The assembly method of the pressure plate 20 and the connector 12 adopts the mutual insertion and cooperation of the first insertion positioning part 120 and the second insertion positioning part 22. Compared with the existing technology of using structural adhesive to bond the iron core lamination 100, it is not only simpler in process and can save the cost of adhesive materials, but also easier and more convenient to operate, which is conducive to improving production efficiency.
[0064] Specifically, in this embodiment, please refer to Figure 2 The two core laminations 100 located at the end of the core body 10 are the first lamination 121 and the second lamination 122, respectively. The first lamination 121 is located between the pressure plate 20 and the second lamination 122, and the two together form the connecting body 12.
[0065] Since the thickness of a single-layer iron core lamination 100 is relatively small, it is difficult to ensure the stability of the insertion of the first insertion positioning part 120 and the second insertion positioning part 22 by using only the outermost iron core lamination 100 as the connector 12. If there are too many layers of iron core lamination 100 as the connector 12, it will not only have little effect on the insertion reliability, but also needlessly increase the processing cost. Therefore, in this embodiment, two layers of iron core lamination 100 are used together as the connector 12.
[0066] To more clearly explain the structure of the first insertion positioning part 120, in this embodiment and subsequent embodiments, the first layer of iron core lamination 100 at the end of the iron core body 10 is defined as the first lamination 121, and the next layer of iron core lamination 100 adjacent to the first lamination 121 is defined as the second lamination 122. In this way, after the iron core body 10 is fastened to the pressure plate 20, the first lamination 121 is located between the pressure plate 20 and the second lamination 122.
[0067] like Figure 5 and Figure 10 As shown, the first insertion positioning part 120 includes an insertion hole 1201 disposed on the first stack 121 and a positioning hole 1202 disposed on the second stack 122; the second insertion positioning part 22 includes a buckle 221, which passes through the insertion hole 1201 and engages with the peripheral portion of the insertion hole 1201, and the portion of the buckle 221 passing through the insertion hole 1201 extends into the positioning hole 1202.
[0068] It should be understood that the periphery of the insertion hole 1201 can be understood as the portion of the first lamination 121 located around the insertion hole 1201 on the side of the plate facing away from the pressure plate 20. During assembly of the pressure plate 20, the latch 221 passes through the insertion hole 1201 and engages with the periphery of the insertion hole 1201, thereby axially pulling the pressure plate 20 and causing the abutment portion 21 to press against the lamination teeth 101 of the first lamination 121. The positioning hole 1202 serves two purposes: firstly, it avoids the portion of the latch 221 passing through the insertion hole 1201; secondly, the positioning hole 1202 can accommodate the portion of the latch 221 extending into the insertion hole 1201, thus preventing the latch 221 from interfering with the second lamination 122. On the one hand, it affects the tightness of the stacking of the first stack 121 and the second stack 122. On the other hand, since there is an interpenetration gap between the buckle 221 and the insertion hole 1201, the insertion hole 1201 cannot form a radial constraint on the buckle 221. Therefore, the positioning hole 1202 can also cooperate with the part of the buckle 221 that passes through the insertion hole 1201 to form a radial limit, thereby preventing the pressure plate 20 from rotating or misaligning relative to the first stack 121, which is beneficial to improving the pressure stability of the pressure plate 20 on the first stack 121.
[0069] In some embodiments, see Figure 6 and Figure 11 The first stack 121 is provided with a positioning hole 1202; the second insertion positioning part 22 also includes a positioning pin 222, which is inserted into the positioning hole 1202 on the first stack 121.
[0070] Considering that the buckle 221 needs to pass through the socket 1201 and form a snap-fit with the surrounding part of the socket 1201, in order to ensure that the buckle 221 can pass through the socket 1201 smoothly, there needs to be a sufficient fit gap between the buckle 221 and the socket 1201. The existence of this fit gap will cause the socket 1201 to be unable to form a radial constraint on the buckle 221, thereby causing the pressure plate 20 to wobble and misalign.
[0071] Even if the buckle 221 is inserted into the positioning hole 1202 on the second stack 122 to form an interlocking fit, although it can compensate for the amount of shaking caused by the above-mentioned fit gap to a certain extent, it cannot completely eliminate the assembly gap. In this case, the positioning hole 1202 on the first stack 121 is inserted into the positioning pin 222 for interlocking fit. Thus, the buckle 221 can be used to snap into the first stack 121 so that the pressure plate 20 forms an axial pressure against the first stack 121. At the same time, the positioning pin 222 is tightly inserted into the positioning hole 1202 to form a radial positioning constraint on the pressure plate 20, so as to avoid the pressure plate 20 from shaking and misaligning, thereby improving the clamping stability of the pressure plate 20 on the first stack 121.
[0072] Among some possible implementations, see [link to relevant documentation]. Figure 12 The first lamination 121 and the second lamination 122 are each provided with a plurality of insertion holes 1201 and a plurality of positioning holes 1202. The insertion holes 1201 and the positioning holes 1202 are alternately distributed along the circumference of the iron core body 10, and the insertion holes 1201 on one of the first lamination 121 and the positioning holes 1202 on the other are aligned one by one.
[0073] The first lamination 121 and the second lamination 122 adopt the same structure, which can improve the consistency and commonality of parts processing, thereby reducing processing and maintenance costs. During assembly, the first lamination 121 and the second lamination 122 are simply rotated relative to each other until the insertion hole 1201 of the first lamination 121 is aligned with the positioning hole 1202 of the second lamination 122, and at the same time, the positioning hole 1202 of the first lamination 121 is aligned with the insertion hole 1201 of the second lamination 122. This allows the buckle 221 to pass through the insertion hole 1201 of the first lamination 121 and engage with the part of the first lamination 121 facing away from the pressure plate 20, extending into the positioning hole 1202. At the same time, the positioning pin 222 directly engages with the positioning hole 1202 of the first lamination 121, which improves the assembly convenience and efficiency of the core body 10.
[0074] The second insertion positioning part 22 includes a plurality of buckles 221 and a plurality of positioning pins 222 that are alternately distributed along the circumference of the iron core body 10. Each buckle 221 passes through the insertion hole 1201 of the first stack 121 and extends into the positioning hole 1202 of the second stack 122. Each positioning pin 222 is inserted into each positioning hole 1202 of the first stack 121.
[0075] The positioning holes 1202 and the insertion holes 1201 are arranged in a cross-interval manner to cooperate with the corresponding buckles 221 and positioning pins 222. This allows the pressure plate 20 to be evenly stressed in the circumferential direction, thereby improving the uniformity and reliability of the pressure force of the pressure plate 20 on the first stack 121 and avoiding the problem of insufficient local pressure force of the pressure plate 20 on the first stack 121, which would cause the stack teeth 101 in that area to spring open at high temperature.
[0076] Specifically, six insertion holes 1201 are distributed circumferentially at a 60-degree angle on the first stack 121 and the second stack 122, and six positioning holes 1202 are distributed circumferentially at a 60-degree angle. The insertion holes 1201 and the positioning holes 1202 are staggered. During assembly, the first stack 121 and the second stack 122 are stacked together with a 30-degree angular deviation, thereby forming a state in which the insertion holes 1201 of the first stack 121 and the positioning holes 1202 of the second stack 122 are aligned.
[0077] As a modified embodiment of the aforementioned positioning pin 222, such as Figure 12 As shown, the positioning pin 222 includes a large diameter section 2221 and a small diameter section 2222; the large diameter section 2221 is inserted into the positioning hole 1202 on the first lamination 121, and the small diameter section 2222 is inserted into the insertion hole 1201 on the second lamination 122.
[0078] Since the end of the buckle 221 needs to be engaged with the periphery of the insertion hole 1201, the size of the positioning hole 1202 is larger than that of the insertion hole 1201. This allows the end of the buckle 221 to easily extend into the positioning hole 1202 of the second stacked piece 122 after it is engaged with the part of the first stacked piece 121 located around the insertion hole 1201, thereby ensuring the tightness of the overlap between the first stacked piece 121 and the second stacked piece 122.
[0079] Based on this, the positioning pin 222 adopts a stepped structure with half thick and half thin, which allows the small diameter section 2222 to pass smoothly through the positioning hole 1202 of the first stack 121 and be inserted into the insertion hole 1201 of the second stack 122, while the large diameter section 2221 directly forms a tight insertion with the positioning hole 1202 on the first stack 121. This allows full use of the insertion hole 1201 on the second stack 122 for connection and positioning. Moreover, the positioning holes 1202 and insertion holes 1201 of the first stack 121 and the second stack 122 can be aligned with the same positioning pin 222 to form an insertion fit. This not only improves the fastening stability of the pressure plate 20, but also forms radial positioning for the first stack 121 and the second stack 122, improving the stacking reliability of the first stack 121 and the second stack 122. This is conducive to further improving the state stability of the first stack 121 and avoiding the problem of the stack teeth 101 of the first stack 121 springing open and warping at high temperature.
[0080] In some embodiments, the above-mentioned buckle 221 adopts the following... Figure 8 The structure shown is as follows. The buckle 221 has an opening groove 2211 at its center, and the buckle 221 forms wedge buckles 2212 on both sides of the opening of the opening groove 2211. The wedge buckles 2212 are used to engage the part of the first stacked piece 121 located around its insertion hole 1201 and extend into the positioning hole 1202.
[0081] It should be noted that in this embodiment, both the buckle 221 and the positioning pin 222 can be integrally injection molded onto the pressure plate 20. This improves the connection reliability and ensures the relative insulation between the first stack 121 and the second stack 122. Furthermore, the buckle 221 should possess a certain degree of toughness to prevent breakage when bent under stress, and also ensure that it can return to its original shape after the external force is removed.
[0082] Based on the above, since the buckle 221 needs to pass through the insertion hole 1201 of the first stack 121 and form a snap-fit with the periphery of the insertion hole 1201, the head end of the buckle 221 needs to be larger than the size of the insertion hole 1201. In order to enable the head end of the buckle 221 to pass smoothly through the insertion hole 1201, an opening groove 2211 is provided in the center of the buckle 221. When the buckle 221 passes through the insertion hole 1201, it is squeezed and elastically deformed into the opening groove 2211, thereby causing the head end of the buckle 221 to shrink and pass through the insertion hole 1201. After passing through, the insertion hole 1201 no longer exerts a squeezing force on the buckle 221. Therefore, the head end of the buckle 221 opens and resets based on its own toughness or elasticity, thereby realizing the snap-fit between the buckle 221 and the periphery of the insertion hole 1201.
[0083] The buckle 221 is located on both sides of the opening of the slot 2211, and wedge buckles 2212 are set as the head end of the buckle 221. When the buckle 221 passes through the insertion hole 1201, the wedge surface of the wedge buckle 2212 contacts the hole wall of the insertion hole 1201, which drives the two wedge buckles 2212 to gradually approach each other. After the wedge buckles 2212 have passed through the insertion hole 1201, they reopen and form a snap-fit with the periphery of the insertion hole 1201. This not only has a simple structure and facilitates the assembly operation of the pressure plate 20, but also improves the snap-fit stability of the buckle 221 on the first stack 121.
[0084] To improve the reliability of the pressure plate 20 against the stacked teeth 101, such as Figure 7 As shown, in this embodiment, the pressure plate 20 has plate teeth 23 that correspond one-to-one with each of the stacked teeth 101, and the plate teeth 23 press against the stacked teeth 101 as at least part of the abutting part 21.
[0085] The pressure plate 20 can specifically adopt the same outline boundary as the iron core lamination 100, or the pressure plate 20 can be consistent with the outline boundary of the iron core lamination 100 at least in the part corresponding to the lamination teeth 101. In this way, the part of the pressure plate 20 corresponding to the lamination teeth 101 will form a ring of plate teeth 23. The plate teeth 23 are used to press against the lamination teeth 101 to prevent the lamination teeth 101 from springing open and warping when the temperature rises.
[0086] As a modified embodiment of the aforementioned pressure plate 20, such as Figure 4 As shown, the pressure plate 20 has an annular groove 24 on its surface facing the iron core body 10, and the pressure plate 20 has abutting parts 21 on both sides of the annular groove 24.
[0087] Since the surface area of the core laminations 100 is large, it is difficult to ensure a good fit when the pressure plate 20 presses directly against the core laminations 100 with a flat surface. Therefore, an annular groove 24 is opened on the pressure plate 20 to reduce the contact area between the pressure plate 20 and the core laminations 100. This ensures that the pressure plate 20 can reliably press against the core laminations 100 in the circumferential direction. In particular, the part on the side of the annular groove 24 is used as the abutment part 21 to improve the pressing effect of the pressure plate 20 on the lamination teeth 101, thereby avoiding the problem of the lamination teeth 101 springing open and lifting after being heated.
[0088] Based on the same inventive concept, this application also provides an electric motor, including the above-described stator core structure.
[0089] Compared with the prior art, the motor provided in this application embodiment adopts the above-mentioned stator core structure. The abutting portion 21 on the pressure plate 20 applies pressure to the lamination teeth 101 distributed on the lamination laminations 100 at the end of the core body 10, preventing the lamination teeth 101 from springing open and warping when the stator temperature is high. The assembly method of the pressure plate 20 and the connecting body 12 adopts a mutual insertion and engagement method between the first insertion positioning portion 120 and the second insertion positioning portion 22. Compared with the prior art method of using structural adhesive to bond the core laminations 100, this method is not only simpler in process and saves on adhesive material costs, but also easier and more convenient to operate, thus improving production efficiency.
[0090] Based on the same inventive concept, this application also provides a vehicle including the aforementioned motor.
[0091] Compared with the prior art, the vehicle provided in this application embodiment adopts a motor with the above-mentioned stator core structure, which can simplify the manufacturing process of the stator core, reduce costs, avoid the problem of the lamination teeth 101 springing open and warping due to high temperature during the assembly and manufacturing process of the stator core, and improve production efficiency.
[0092] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A stator core structure, characterized in that, include: The iron core body is composed of several iron core laminations stacked together. Each iron core lamination has several lamination teeth distributed at intervals along its circumference. The lamination teeth of each iron core lamination are aligned to form the winding portion of the iron core body. At least one layer of iron core laminations located at both ends of the iron core body serves as a connecting body. Each connecting body is provided with a first insertion positioning part. Both pressure plates are provided with a second insertion positioning part. The two pressure plates are pressed against the two ends of the iron core body and are fixed by the second insertion positioning part corresponding to the first insertion positioning part. The pressure plate has at least an abutting portion that can press against each of the stacked teeth.
2. The stator core structure as described in claim 1, characterized in that, The two layers of core laminations located at the end of the core body are a first lamination and a second lamination, respectively. The first lamination is located between the pressure plate and the second lamination, and the two together form the connecting body. The first insertion positioning part includes an insertion hole disposed on the first stack and a positioning hole disposed on the second stack; The second insertion positioning part includes a buckle that passes through the insertion hole and engages with the periphery of the insertion hole, and the portion of the buckle that passes through the insertion hole extends into the positioning hole.
3. The stator core structure as described in claim 2, characterized in that, The first stacked plate is provided with the positioning hole; the second insertion positioning part further includes a positioning pin, which is inserted into the positioning hole on the first stacked plate.
4. The stator core structure as described in claim 3, characterized in that, Both the first lamination and the second lamination are provided with a plurality of insertion holes and a plurality of positioning holes. The insertion holes and the positioning holes are alternately distributed along the circumference of the iron core body, and the insertion holes on one of the first lamination and the positioning holes on the other lamination are aligned one by one. The second insertion positioning part includes a plurality of buckles and a plurality of positioning pins that are alternately distributed along the circumference of the iron core body. Each buckle passes through the insertion hole of the first lamination and extends into the positioning hole of the second lamination. Each positioning pin is inserted into each positioning hole of the first lamination.
5. The stator core structure as described in claim 4, characterized in that, The positioning pin includes a large diameter section and a small diameter section; the large diameter section is inserted into the positioning hole on the first lamination, and the small diameter section is inserted into the insertion hole on the second lamination.
6. The stator core structure as described in claim 2, characterized in that, The buckle has an opening groove in the center, and the buckle forms wedge buckles on both sides of the opening groove. The wedge buckles are used to engage the part of the first stacked piece located around its insertion hole and extend into the positioning hole.
7. The stator core structure as described in claim 1, characterized in that, The pressure plate has plate teeth that correspond one-to-one with each of the stacked teeth, and the plate teeth act as at least a portion of the abutting portion, pressing against the stacked teeth.
8. The stator core structure as described in any one of claims 1-7, characterized in that, The pressure plate has an annular groove on its surface facing the iron core body, and the abutting portion is formed on both sides of the pressure plate located in the annular groove.
9. An electric motor, characterized in that, Including the stator core structure as described in any one of claims 1-8.
10. A vehicle, characterized in that, Includes the motor as described in claim 9.