Straight stator material belt, material guide structure, stator and motor

Abstract

The utility model discloses a straight-bar stator material belt, a material guiding structure, a stator and a motor, the straight-bar stator material belt comprises a punching sheet material belt, one side of the punching sheet material belt is bent to form a first supporting part, the other side of the punching sheet material belt is bent to form a second supporting part, and the first supporting part and the second supporting part are oppositely arranged. During stamping and feeding, the first supporting part is embedded into the first profiling groove of the first material guiding structure in a sliding mode to be fixed, and the second supporting part is embedded into the second profiling groove of the second material guiding structure in a sliding mode to be fixed. The two sides of the material belt are bent to form the first supporting part and the second supporting part respectively, the strength of the two sides of the material belt is improved, the first supporting part is embedded into the first profiling groove of the first material guiding structure, the second supporting part is arranged in the second profiling groove of the second material guiding structure, and the material belt is pulled from the two sides to form strong support. The problems that the high-speed stamping feeding strength is poor, and deformation is prone to occurring are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a straight stator strip, a stator and a motor. Background Art

[0002] With the innovation of the industry technology, the BMC plastic encapsulation structure replaces the transmission iron shell structure, eliminating the requirement for the outer shape of the iron shell stator core to be circular arc, and changing the outer shape of the stator core to a straight edge shape. At present, in the field of household motors, the straight stator has become the mainstream development direction, and the proportion of the straight structure stator core is increasing. On the same punching sheet, two products can be arranged without waste material. In the traditional punching layout, there is waste material for a whole week between two products, and the material utilization rate is only about 40%. The outer shape of the product changes from circular to straight edge, and the waste material between the outer shapes of two products is reduced, but the material utilization rate is still low.

[0003] During the process of pushing the raw material silicon steel strip to move forward at high speed for feeding, there are problems such as poor strip strength and easy deformation during feeding, making it difficult to achieve high-speed stamping. Summary of the Utility Model

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a straight stator strip, a guiding structure, a stator and a motor, so as to solve the problem of poor strip strength and easy deformation during the high-speed stamping of the waste-free inserted strip.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a straight stator strip, comprising: a first supporting part is formed by bending one side of the punching strip, and a second supporting part is formed by bending the other side of the punching strip. The first supporting part and the second supporting part are arranged oppositely. During stamping and feeding, the first supporting part is fixedly installed by sliding and fitting into the first profiling groove of the first guiding structure, and the second supporting part is fixedly installed by sliding and fitting into the second profiling groove of the second guiding structure.

[0006] As a further improvement of the utility model: the first supporting part includes a first transition connecting edge and a first fixed connecting edge. One side of the first transition connecting edge is connected to the punching strip, and the other side of the first transition connecting edge is connected to the first fixed connecting edge. The included angle between the first transition connecting edge and the first fixed connecting edge is an acute angle or a right angle.

[0007] As a further improvement of the utility model: the second supporting part includes a second transition connecting edge and a second fixed connecting edge. One side of the second transition connecting edge is connected to the punching strip, and the other side of the second transition connecting edge is connected to the second fixed connecting edge. The included angle between the second transition connecting edge and the second fixed connecting edge is an acute angle or a right angle.

[0008] As a further improvement of the utility model: both the first supporting part and the second supporting part are in an L shape.

[0009] As a further improvement of the present utility model: multiple stator punching units are simultaneously arranged and manufactured during the blanking production process of the straight stator strip, and the multiple stator punching units include a first stator punching unit and a second stator punching unit;

[0010] The first stator punching unit is provided with a first stator tooth and a first stator yoke portion, and the inner end face of the first stator yoke portion extends out of the first stator tooth;

[0011] The second stator punching unit is provided with a second stator tooth and a second stator yoke portion, and the inner end face of the second stator yoke portion extends out of the second stator tooth;

[0012] The outer end face of the first stator yoke portion is adhesively connected to the outer end face of the second stator yoke portion.

[0013] As a further improvement of the present utility model: a first circular deformation area is provided between the inner end faces of adjacent first stator yoke portions, a first process groove is provided on the outer end face of the second stator yoke portion, the first process groove is arranged opposite to the first circular deformation area, and the outer notch of the first process groove is abutted against the connection position of the outer end faces of the first stator yoke portion and the second stator yoke portion.

[0014] As a further improvement of the present utility model: a second circular deformation area is provided between the inner end faces of adjacent second stator yoke portions, a second process groove is provided on the outer end face of the first stator yoke portion, the second process groove is arranged opposite to the second circular deformation area, and the outer notch of the second process groove is abutted against the connection position of the outer end faces of the second stator yoke portion and the first stator yoke portion.

[0015] As a further improvement of the present utility model: the distance between the inner notch of the first process groove and the first circular deformation area is greater than 1.0 mm, the inner notch and the outer notch of the first process groove are arranged opposite to each other, and the inner notch of the first process groove is located on the second stator yoke portion.

[0016] As a further improvement of the present utility model: the distance between the inner notch of the second process groove and the second circular deformation area is greater than 1.0 mm, the inner notch and the outer notch of the second process groove are arranged opposite to each other, and the inner notch of the second process groove is located on the first stator yoke portion.

[0017] As a further improvement of the present utility model: the distance between the outer notch of the first process groove and the second circular deformation area is 0.5 mm, and the distance between the outer notch of the second process groove and the first circular deformation area is 0.5 mm.

[0018] As a further improvement of the present utility model: the groove depth of the first process groove and the second process groove is greater than 1.5 times the material thickness of the punching strip, and the groove width of the first process groove and the second process groove is greater than 2.0 mm.

[0019] As a further improvement of the present utility model: It further includes a third stator punching sheet unit. The third stator punching sheet unit is provided with a third stator tooth and a third stator yoke portion. The inner end face of the third stator yoke portion extends out the third stator tooth. The third stator tooth is interspersed between adjacent first stator teeth. The third stator yoke portion is provided with a third process groove, and the outer cut of the third process groove fits with the outer end face of the third stator yoke portion.

[0020] A feeding guide structure is applied to the straight stator strip described above. The feeding guide structure includes a first feeding guide structure and a second feeding guide structure. The first feeding guide structure and the second feeding guide structure are oppositely arranged. The first feeding guide structure is provided with a first profiling groove, and one side of the first profiling groove is provided with a first opening. The second feeding guide structure is provided with a second profiling groove, and one side of the second profiling groove is provided with a second opening. The first opening and the second opening are oppositely arranged. The first profiling groove is fitted and engaged with the first supporting portion, and the second profiling groove is fitted and engaged with the second supporting portion.

[0021] As a further improvement of the present utility model: Both the first profiling groove and the second profiling groove are in an L shape.

[0022] A stator includes the straight stator strip described above.

[0023] An electric motor includes the stator described above.

[0024] Compared with the prior art, the beneficial effects of the present utility model are:

[0025] In the present utility model, one side of the punching sheet strip is bent to form a first supporting portion, and the other side of the punching sheet strip is bent to form a second supporting portion. The first supporting portion and the second supporting portion are oppositely arranged. During stamping and feeding, the first supporting portion is inserted into the first profiling groove of the first feeding guide structure and clamped and fixed, and the second supporting portion is inserted into the second profiling groove of the second feeding guide structure and clamped and fixed. Through the first profiling groove and the second profiling groove, the first supporting portion and the second supporting portion formed by bending pull the strip from both sides to form a strong support. When the front feeder pushes the strip forward, the bending of both sides of the strip can overcome greater resistance, and the middle part of the strip is not easily bent or folded, realizing the possibility of high-speed stamping. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of a straight stator strip according to an embodiment of the present utility model.

[0027] Figure 2 is Figure 1 A partial enlarged view of the O part in

[0028] Figure 3 It is a schematic structural diagram of the layout of a straight stator strip according to an embodiment of the present utility model.

[0029] Figure 4 This is a side view of a straight stator strip in an embodiment of the present utility model.

[0030] Figure 5 It is Figure 4 a partial enlarged view of part A in

[0031] Figure 6 It is Figure 4 a partial enlarged view of part B in

[0032] Figure 7 This is a layout schematic diagram of a straight stator strip with two-side bending and process grooves in an embodiment of the present utility model.

[0033] Figure 8 It is Figure 7 a partial enlarged view of part C in

[0034] Figure 9 It is Figure 7 a partial enlarged view of part D in

[0035] Figure 10 This is a structural schematic diagram of the layout of the first stator punching unit in an embodiment of the present utility model.

[0036] Figure 11 This is a marking schematic diagram of the layout of a straight stator strip in an embodiment of the present utility model.

[0037] Figure 12 It is an insertion arrangement scheme for the conventional straight stator iron core structure in the prior art.

[0038] Figure 13 It is the insertion layout of two products of the straight stator iron core in the prior art.

[0039] Figure 14 It is a partial effect diagram of the insertion strip of two products of the straight stator iron core in the prior art.

[0040] Reference numerals:

[0041] 1. First scrap of the side margin, 2. Second scrap of the side margin, 3. First product, 4. Second product,

[0042] 10. Punching strip, 101. Division line,

[0043] 11. First support part, 111. First fixed side margin, 112. First transition side margin, 113. First limiting space,

[0044] 12. Second support part, 121. Second fixed side margin, 122. Second transition side margin, 123. Second limiting space,

[0045] 13. First stator punching unit, 131. First stator tooth, 132. First stator yoke, 1321. First inner end face, 1322. First outer end face, 133. First circular deformation area, 134. Second process groove

[0046] 14. Second stator punching unit, 141. Second stator tooth, 142. Second stator yoke, 1421. Second inner end face, 1422. Second outer end face, 143. Second circular deformation area, 144. First process groove

[0047] 15. Third stator punching unit, 151. Third stator tooth, 152. Third stator yoke, 1521. Third inner end face, 1522. Third outer end face, 153. Third circular deformation area, 154. Third process groove

[0048] 16. First material guiding structure, 161. First profiling groove, 162. First opening, 163. First fixing part

[0049] 17. Second material guiding structure, 171. Second profiling groove, 172. Second opening, 173. Second fixing part Detailed implementation mode

[0050] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments of the present utility model and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0051] In order to solve the technical problems in the prior art, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments

[0052] As Figures 1 to 11 shown, an embodiment of the present utility model discloses a straight stator strip. One side of the straight stator strip body 10 is bent to form a first support portion 11, and the other side of the straight stator strip body 10 is bent to form a second support portion 12. The first support portion 11 and the second support portion 12 are arranged opposite to each other. During stamping and feeding, the first support portion 11 is fitted into the first profiling groove 161 of the first material guiding structure 16, and the second support portion 12 is fitted into the second profiling groove 171 of the second material guiding structure 17.

[0053] In this embodiment, bending and forming structures are designed on both sides of the punching strip. Specifically, after one side of the strip is bent, the material hardens to form the first support portion 11, and after the opposite side of the strip is bent, the material hardens to form the second support portion 12, similar to forming an angle steel structure. The angle steel structure can be in an L shape or an angle steel structure with an acute angle. This can greatly improve the bending strength of the punching strip. At the same time, the first support portion 11 and the second support portion 12 formed after bending both sides of the punching strip are equivalent to forming support rods on both sides of the punching strip, significantly improving the strength of both sides of the punching strip. When the front feeding mechanism pushes the strip forward at high speed, the bending of both sides of the strip can overcome greater resistance and will not bend or fold, solving the problem that the strip has poor strength and is prone to deformation during feeding, which affects the normal production of high-speed stamping.

[0054] During actual production, the first guiding structure 16 and the second guiding structure 17 in this embodiment are structures on the feeding mechanism for fixing the strip. According to the shape and structure of the first support portion 11, the first guiding structure 16 is designed with a first profiling groove 161, that is, the first support portion 11 is adapted to the first profiling groove 161, so that the first support portion 11 on one side of the punching strip is embedded in the first profiling groove 161 for fixation, then one side of the punching strip is positioned and clamped by the first profiling groove 161.

[0055] Similarly, according to the shape and structure of the second support portion 12, the second guiding structure 17 is designed with a second profiling groove 171, that is, the second support portion 12 is adapted to the second profiling groove 171, so that the second support portion 12 on the other side of the punching strip is embedded in the second profiling groove 171 for fixation, then the other side of the punching strip is positioned and clamped by the second profiling groove 171. In this way, both sides of the punching strip are fixed by the first guiding structure 16 and the second guiding structure 17 respectively. Through the first profiling groove 161 and the second profiling groove 171, the first support portion 11 and the second support portion 12 formed by bending pull the strip from both sides to form a strong support. When the front feeder pushes the strip forward, the bending of both sides of the strip can overcome greater resistance, and the middle part of the strip is not easily bent or folded.

[0056] For the straight stator strip arranged in an insertion row pattern, when one product is punched, the narrowest width of the strip is only 0.5 mm at multiple places, as shown in Figure 8 the 0.5 mm dimension in the product drawing and Figure 9 shown. The strength of the middle part of the strip is very weak, and the strip is extremely prone to deformation. The middle part is in the shape of the product and cannot be changed. By bending both sides of the strip to form the first support portion 11 and the second support portion 12, the strength of the strip is improved to achieve stable feeding during high-speed stamping production and is not easily folded or bent and deformed.

[0057] In some embodiments, the first support portion 11 includes a first transition connecting edge 112 and a first fixed connecting edge 111. One side of the first transition connecting edge 112 is connected to the punching strip 10, and the other side of the first transition connecting edge 112 is connected to the first fixed connecting edge 111. A first limiting space 113 is formed between the first fixed connecting edge 111 facing the inner side of the second support portion 12 and the first transition connecting edge 112.

[0058] Scrap connecting edges are provided around the stator punching strip. The first support portion 11 is formed on one side of the stator punching strip. Both the first transition connecting edge 112 and the first fixed connecting edge 111 are edge scraps of the stator punching strip. One side of the strip is bent to form the first support portion 11, effectively utilizing the edge scraps and at the same time enhancing the strength of one side of the strip.

[0059] The formation of the first limiting space 113 means that an included angle is formed between the first transition connecting edge 112 and the first fixed connecting edge 111. Preferably, the first included angle formed by the first transition connecting edge 112 and the first fixed connecting edge 111 can be an acute angle or a right angle. Correspondingly, the first profiling groove 161 on the first material guiding structure 16 is also specifically designed according to the connection, angle, and shape of the first transition connecting edge 112 and the first fixed connecting edge 111.

[0060] More preferably, the first included angle formed by the first transition connecting edge 112 and the first fixed connecting edge 111 can be 90°, that is, the first transition connecting edge 112 and the first fixed connecting edge 111 form an L-shaped configuration. Then, the first profiling groove 161 on the first material guiding structure 16 is designed to be L-shaped. The L-shaped first profiling groove 161 and the L-shaped first support portion 11 are fitted and connected to each other, realizing the clamping connection between the first support portion 11 formed by bending one side of the punching strip and the first profiling groove 161 of the first material guiding structure 16. In this way, the stability of the feeding process is ensured, and the strip can withstand a large resistance and will not be easily folded or bent.

[0061] The first profiling groove 161 of this embodiment has a first opening 162. One end of the first support portion 11 is slidably inserted into the first profiling groove 161 through the first opening 162. The first transition connecting edge 112 is inserted into the side of the first profiling groove 161 where the first opening 162 is provided, and the first fixed connecting edge 111 is placed on the other side of the first profiling groove 161 away from the first opening 162.

[0062] In some embodiments, a first limiting space 113 as described above is formed between the inner side of the first support portion 11 facing the second support portion 12 and the punching strip 10, and a first fixing portion 163 of the first material guiding structure 16 is inserted into the first limiting space 113.

[0063] The inner wall of the first fixing part 163 is the groove wall of the first profiling groove 161, and the shape formed by surrounding the inner wall of the first fixing part 163 is the same as the shape formed by surrounding the inner wall of the first profiling groove 161.

[0064] A first limiting space 113 is formed between the inner side of the first supporting part 11 facing the second supporting part 12 and the punching strip 10. When the first supporting part 11 and the first material guiding structure 16 are assembled, the first fixing part 163 of the first material guiding structure 16 is embedded in the first limiting space 113. In some cases, in order to make the first supporting part 11 and the first profiling groove 161 fit tightly to improve the connection stability between the two, the inner wall of the first fixing part 163 can be made to abut against the first supporting part 11. In this way, the first fixing part 163 of the first material guiding structure 16 is fitted and clamped with the first limiting space 113, and the first supporting part 11 and the first material guiding structure 16 are limited and clamped.

[0065] In some embodiments, the second supporting part 12 includes a second transition connecting edge 122 and a second fixing connecting edge 121. One side of the second transition connecting edge 122 is connected to the punching strip 10, the other side of the second transition connecting edge 122 is connected to the second fixing connecting edge 121, and a second limiting space 123 is formed between the inner side of the second fixing connecting edge 121 facing the first supporting part 11 and the second transition connecting edge 122.

[0066] The second supporting part 12 is formed on the other side of the stator punching strip. Both the second transition connecting edge 122 and the second fixing connecting edge 121 are the edge waste materials of the stator punching strip. The other side of the strip is bent to form the second supporting part 12, effectively utilizing the edge waste materials. At the same time, the strength of the other side of the strip is improved. The first supporting part 11 and the second supporting part 12 formed by bending both sides of the strip effectively improve the strength of both sides of the strip. Under the combined action with the first profiling groove 161 and the second profiling groove 171 of the first material guiding structure 16, the bending strength is greatly improved.

[0067] The formation of the second limiting space 123 means that there is an included angle between the second transition connecting edge 122 and the second fixing connecting edge 121. Preferably, the second included angle formed by the second transition connecting edge 122 and the second fixing connecting edge 121 can be an acute angle or a right angle. Correspondingly, the second profiling groove 171 on the second material guiding structure 17 is also specifically designed according to the connection, angle, and shape of the second transition connecting edge 122 and the second fixing connecting edge 121.

[0068] More preferably, the first included angle formed by the second transition connecting edge 122 and the second fixed connecting edge 121 can be 90°, that is, the second transition connecting edge 122 and the second fixed connecting edge 121 form an L-shaped configuration. Then, the second profiling groove 171 on the second material guiding structure 17 is designed to be L-shaped, and the L-shaped second profiling groove 171 is fitted and connected with the L-shaped second supporting portion 12, so that the second supporting portion 12 formed by bending the other side of the punching sheet strip is clamped and connected with the second profiling groove 171 of the second material guiding structure 17. In this way, the stability of the feeding process is ensured, and the strip can withstand greater resistance and will not be easily folded or bent.

[0069] In this embodiment, the second profiling groove 171 of the second material guiding structure 17 has a second opening 172. One end of the second supporting portion 12 is slidably inserted into the second profiling groove 171 through the second opening 172. The second transition connecting edge 122 is inserted into one side of the second profiling groove 171 where the second opening 172 is provided, and the second fixed connecting edge 121 is placed on the other side of the second profiling groove 171 away from the second opening 172.

[0070] Furthermore, a second limiting space 123 is formed between the inner side of the second supporting portion 12 facing the first supporting portion 11 and the punching sheet strip 10, and the second fixing portion 173 of the second material guiding structure 17 is inserted into the second limiting space 123.

[0071] The inner wall of the second fixing portion 173 is the groove wall of the second profiling groove 171, and the shape formed by enclosing the inner wall of the second fixing portion 173 is the same as the shape formed by enclosing the inner wall of the second profiling groove 171.

[0072] After the second supporting portion 12 is bent, a first limiting space 113 is formed between the inner side of the second supporting portion 12 facing the first supporting portion 11 and the punching sheet strip 10. When the second supporting portion 12 and the second material guiding structure 17 are assembled, the second fixing portion 173 of the second material guiding structure 17 is inserted into the second limiting space 123. In some cases, in order to make the second supporting portion 12 and the second profiling groove 171 fit tightly and improve the stability of the fixed connection between the two, the inner wall of the second fixing portion 173 can be made to abut against the second supporting portion 12. In this way, the first fixing portion 163 of the second material guiding structure 17 is fitted and clamped with the first limiting space 113, and the first supporting portion 11 and the first material guiding structure 16 are limited and clamped.

[0073] In this embodiment, the first fixing portion 163 of the first material guiding structure 16 is inserted into the first limiting space 113 formed by the first supporting portion 11 and the strip body, and the inner side of the first fixing portion 163 abuts against the first supporting portion 11, which is understood as the first fixing portion 163 designed by the first material guiding structure 16 forming a clamping limit with the first supporting portion 11. Similarly, the design principle of the second material guiding structure 17 is the same as that of the first material guiding structure 16.

[0074] The second fixing portion 173 of the second material guiding structure 17 is fitted and clamped with the second limiting space 123, and the second supporting portion 12 is limited and clamped with the second material guiding structure 17, so that both sides of the material tape are limited and clamped, ensuring that the material tape does not shift, and the first material guiding structure 16 and the second material guiding structure 17 pull the material tape from both sides to form a strong support. Under the thrust of the feeding mechanism, the middle part of the material tape is pulled forward to complete the feeding, thus solving the problems that the material tape is prone to deformation during high-strength feeding and it is difficult to achieve high-speed stamping production.

[0075] The above-mentioned first supporting portion 11, second supporting portion 12 and the designed first profiling groove 161 and second profiling groove 171 and other structures are applied to the straight stator material tape of the waste-free socket, improving the feeding stability during stamping, ensuring that the material tape does not shift or swing, and at the same time, the material tape is not prone to bending or folding deformation during the feeding process.

[0076] The middle area of the straight stator material tape body 10 in this embodiment is used for stamping stator punching sheet units, and multiple stator punching sheet units are simultaneously arranged and manufactured during the nesting process of the straight stator material tape.

[0077] The multiple stator punching sheet units include a first stator punching sheet unit 13 and a second stator punching sheet unit 14; the first stator punching sheet unit 13 is provided with a first stator tooth 131 and a first stator yoke portion 132, the inner end surface of the first stator yoke portion 132 extends out the first stator tooth 131, the second stator punching sheet unit 14 is provided with a second stator tooth 141 and a second stator yoke portion 142, the inner end surface of the second stator yoke portion 142 extends out the second stator tooth 141, the first stator tooth 131 and the second stator tooth 141 are arranged in a back-to-back manner, and the outer end surface of the first stator yoke portion 132 is in fit connection with the outer end surface of the second stator yoke portion 142.

[0078] In some embodiments, one end of the first stator tooth 131 is connected to one end of the first stator yoke portion 132, and the other end of the second stator tooth 141 extends in a direction away from the second stator punching sheet unit 14; one end of the second stator tooth 141 is connected to one end of the second stator yoke portion 142, the other end of the second stator tooth 141 extends in a direction away from the first stator punching sheet unit 13, and the other end of the first stator yoke portion 132 is connected to the other end of the second stator yoke portion 142.

[0079] Furthermore, the first stator yoke portion 132 has a first inner end surface 1321 and a first outer end surface 1322, the first stator tooth 131 is arranged on the first inner end surface 1321, the first outer end surface 1322 is arranged in a direction away from the first stator tooth 131, the second stator yoke portion 142 has a second inner end surface 1421 and a second outer end surface 1422, the second stator tooth 141 is arranged on the second inner end surface 1421, the second outer end surface 1422 is arranged in a direction away from the second stator tooth 141, and the first outer end surface 1322 and the second outer end surface 1422 are arranged in mutual fit.

[0080] Furthermore, the first outer end face 1322 of the first stator yoke portion 132 and the second outer end face 1422 of the second stator yoke portion 142 are straight-edge end faces.

[0081] By fitting and connecting the first stator yoke portion 132 of the first stator punching unit 13 and the second stator yoke portion 142 of the second stator punching unit 14 to each other, that is, directly fitting the first outer end face 1322 of the first stator yoke portion 132 and the second outer end face 1422 of the second stator yoke portion 142, the existing lap structure between the first stator punching unit 13 and the second stator punching unit 14 is effectively eliminated. No lap waste is generated between the first stator punching unit 13 and the second stator punching unit 14, effectively improving the utilization rate of raw materials. That is, by designing the first outer end face 1322 and the second outer end face 1422 as straight-edge end faces, no lap needs to be reserved between adjacent stator punching units during nesting, reducing the material cost.

[0082] A plurality of first stator punching units 13 are sequentially arranged along the strip width direction of the strip. The plurality of first stator punching units 13 are sequentially connected to form a first straight-strip stator core punching. The first stator punching unit 13 at the head end is connected to the first stator punching unit 13 at the tail end to form an annular stator punching structure. A plurality of annular stator punching structures are stacked and pressed into an integral stator core structure.

[0083] Similarly, a plurality of second stator punching units 14 are arranged along the strip width direction. The plurality of second stator punching units 14 are sequentially connected to form a second straight-strip stator core punching. The second stator punching unit 14 at the head end is connected to the second stator punching unit 14 at the tail end to form an annular stator punching structure.

[0084] The first straight-strip stator core punching and the second straight-strip stator core punching can be the same product. The first stator punching unit 13 rotated 180° is the second stator punching unit 14. The first straight-strip stator core punching and the second straight-strip stator core punching can also be different products.

[0085] In some embodiments, a first circular deformation region 133 is provided between adjacent first stator yoke portions 132 on the first stator punching unit 13. The opening of the first circular deformation region 133 is arranged facing the direction of the second stator teeth 141 of the second stator punching unit 14. The first circular deformation region 133 is arranged between the first inner end faces 1321 of adjacent first stator yoke portions 132.

[0086] In some embodiments, similarly, a second circular deformation region 143 is provided between adjacent second stator yoke portions 142 on the second stator punching unit 14. The opening of the second circular deformation region 143 is arranged facing the direction of the first stator teeth 131 of the first stator punching unit 13. The second circular deformation region 143 is arranged between the second inner end faces 1421 of adjacent second stator yoke portions 142.

[0087]

[0087] Two products are arranged on the straight stator strip. For example, the dividing line 101 is at the tangent point of the outer end face of the first stator yoke 132 and the outer end face of the second stator yoke 142. When the two products are divided into two at the dividing line 101, due to the cumulative errors in all aspects, the dividing thicknesses of the two products are not the same width. For example, when the first stator punching unit 13 and the second stator punching unit 14 are divided into two, the first stator yoke 132 and the second stator yoke 142 are not the same width, resulting in inconsistent distances from the first circular deformation region 133 to the outer end face of the first stator yoke 132 and from the second circular deformation region 143 to the outer end face of the second stator yoke 142. That is, the key dimensions for forming circles in the first circular deformation region 133 and the second circular deformation are not the same, directly affecting the large difference in the circular dimensions of the two rows and causing quality problems.

[0088] In some embodiments, a first process groove 144 is provided on the outer end face of the second stator yoke 142. The first process groove 144 is disposed opposite to the first circular deformation region 133, and the outer cut of the first process groove 144 is attached to the connection of the outer end faces of the first stator yoke 132 and the second stator yoke 142. Specifically, the first process groove 144 is opened on the first stator yoke 132, and the outer cut of the first process groove 144 is fitted to the first outer end face 1322 of the first stator yoke 132, or rather, the outer cut of the first process groove 144 is fitted to the second outer end face 1422 of the second stator yoke 142.

[0089]

[0088] In some embodiments, a second process groove 134 is provided on the outer end face of the first stator yoke 132. The second process groove 134 is disposed opposite to the second circular deformation region 143, and the outer cut of the second process groove 134 is attached to the connection of the outer end faces of the second stator yoke 142 and the first stator yoke 132. Specifically, the second process groove 134 is opened on the second stator yoke 142, and the outer cut of the second process groove 134 is fitted to the first outer end face 1322 of the first stator yoke 132, or rather, the outer cut of the second process groove 134 is fitted to the second outer end face 1422 of the second stator yoke 142.

[0090] In some embodiments, the first process groove 144 is opened in the middle region of the second outer end face 1422 of the second stator yoke 142, and the second process groove 134 is provided in the middle region of the first outer end face 1322 of the first stator yoke 132.

[0091] According to the strip stator tape insertion arrangement, a first process groove 144 is opened on the outer shape of the first stator yoke portion 132 corresponding to each first stator tooth 131, and a second process groove 134 is opened on the outer shape of the second stator yoke portion 142 corresponding to each second stator tooth 141. The number of the first process grooves 144 is equal to the number of the first stator teeth 131 minus one, and the number of the second process grooves 134 is equal to the number of the second stator teeth 141 minus one.

[0092] When arranging the tape insertion layout, the first process groove 144 is the splicing surface position of the first stator punching unit 13 product / the second stator punching unit 14 product, that is, at the splicing position where the process groove is opposite to the circular deformation area. Before the two products are divided into two at the dividing line 101 during stamping, the first process groove 144, the second process groove 134 and the splicing holes are first punched on the tape. Solve the problem that when there is no first process groove 144 and second process groove 134, there are fluctuations in the key circular dimensions of the two products when they are divided into two, resulting in unstable dimensions after forming a circle, and ensure the stability and unity of the two columns of products.

[0093] The designed key circular dimension is 0.5 mm, that is, the distance between the first circular deformation area 133 and the outer cut of the first process groove 144 is 0.5 mm, and the distance between the second circular deformation area 143 and the outer cut of the second process groove 134 is 0.5 mm.

[0094] The size and shape of the first process groove 144 and the second process groove 134 are designed on the premise of not affecting the performance of the motor. Generally, the groove depth is designed to be more than 1.5 times the material thickness to ensure the strength of the punch.

[0095] When the designed key circular dimension is 0.5 mm, the first process groove 144 is required to be more than 2.0 mm to ensure that the second circular deformation area 143 is vacated. Similarly, the groove width of the second process groove 134 is required to be more than 2.0 mm to ensure that the second circular deformation area 143 is vacated.

[0096] In some embodiments, when the designed key circular dimension is 0.5 mm, the distance between the inner cut of the first process groove 144 and the first circular deformation area 133 is greater than 1.0 mm. The inner cut of the first process groove 144 is arranged opposite to the outer cut, and the inner cut of the first process groove 144 is located on the second stator yoke portion 142.

[0097] The inner cut of the first process groove 144 is far from the second outer end face 1422 of the second stator yoke portion 142. Preferably, the inner cut and the outer cut of the first process groove 144 are parallel to each other, then the first process groove 144 can be designed as a rectangular groove. Generally, there is a distance greater than 1.0 mm between the inner cut and the outer cut of the first process groove 144 to ensure the strength of the punch. More preferably, the groove width of the first process groove 144 is greater than 2.0 mm.

[0098] In some embodiments, when the designed circular key dimension is 0.5 mm, as Figure 9 shown, the marked dimension h is 0.5 mm. The distance between the inner cut of the second process groove 134 and the second circular deformation area 143 is greater than 1.0 mm. The inner cut of the second process groove 134 is arranged opposite to the outer cut, and the inner cut of the second process groove 134 is located on the first stator yoke 132.

[0099] The inner cut of the second process groove 134 is away from the first outer end face 1322 of the first stator yoke 132. Preferably, the inner cut and the outer cut of the second process groove 134 are parallel to each other, and then the second process groove 134 can be designed as a rectangular groove. Generally, there is a distance greater than 1.0 mm between the inner cut and the outer cut of the second process groove 134 to ensure the strength of the punch. More preferably, the groove width of the second process groove 134 is greater than 2.0 mm.

[0100] In some embodiments, it further includes a third stator punching unit 15. In the step direction of the straight stator core strip, the third stator punching unit 15, the first stator punching unit 13, and the second stator punching unit 14 are connected in sequence, and the step direction is perpendicular to the material width direction.

[0101] Furthermore, the third stator punching unit 15 is provided with third stator teeth 151 and a third stator yoke 152. The third inner end face 1521 of the third stator yoke 152 extends out of the third stator teeth 151. The third stator teeth 151 are interspersed between adjacent first stator teeth 131, and the first stator teeth 131 are interspersed between adjacent third stator teeth 151.

[0102] Specifically, one end of the third stator tooth 151 is connected to one end of the third stator yoke 152, and the other end of the third stator tooth 151 extends in the direction close to the first stator punching unit 13, and the other end of the third stator tooth 151 is close to the first stator yoke 132. The other end of the first stator tooth 131 extends in the direction towards the third stator yoke 152, and the other end of the first stator yoke 132 is close to the third stator yoke 152.

[0103] In addition, there is a third circular deformation area 153 between adjacent third stator yokes 152 on the third stator punching unit 15, and the opening of the third circular deformation area 153 faces the other end of the first stator tooth 131.

[0104] The third stator yoke 152 is provided with a third process groove 154, and the outer cut of the third process groove 154 fits with the outer end face of the third stator yoke 152.

[0105] When the third outer end face 1522 of the third stator yoke 152 is spliced with the first stator yoke 132, the outer cut of the third process groove 154 is connected in a fitting manner with the first outer end face 1322 of the first stator yoke 132.

[0106] The specific shape, groove depth, position, groove width, etc. of the third process groove 154 are the same as those of the first process groove 144 and the second process groove 134, and will not be elaborated here.

[0107] In some embodiments, when the structures of the first stator punching unit 13, the second stator punching unit 14, and the third stator punching unit 15 arranged on the straight stator core strip are the same, that is, only one type of stator punching structure is stamped on the straight stator core strip, in the tape pitch direction, the third stator punching unit 15, the first stator punching unit 13, and the second stator punching unit 14 are connected.

[0108] In some embodiments, when the structures of the second stator punching unit 14 and the third stator punching unit 15 arranged on the straight stator core strip are the same, that is, two types of stator punching structures are stamped on the straight stator core strip, the second stator yoke portion 142 of the second stator punching unit 14 is spliced with the first stator yoke portion 132 of the first stator punching unit 13, and the third stator teeth 151 of the third stator punching unit 15 are inserted between adjacent first stator teeth 131.

[0109] Through the above arrangements, the material utilization rate of the straight stator core is greatly improved, the tape pitch is greatly reduced, and the usage amount of the raw material silicon steel sheet is greatly reduced. From Figure 12 、 Figure 13 、 Figure 11 By comparing the material width and pitch, product structure changes, and the implementation of the waste-free interleave process, the usage amount of silicon steel sheets is reduced by about 38%, thereby achieving the reduction of core cost and energy consumption. Utilizing the angle steel strength principle, bending forming is added to both sides of the tape, greatly increasing the strength of both sides of the tape, thereby pulling the middle part of the tape forward. The tape is not easily folded or bent, enabling high-speed stamping and solving the problem of poor strength of waste-free interleave tapes in the industry for high-speed feeding.

[0110] Figures 11 to 14 In Figure 13 、 Figure 11 In Figure 11 As shown in the first tab scrap 1, compared with Figure 13 With wasteful interleave, the product has waste on all sides. As Figure 13 Shown, the first tab scrap 1 is 6.5 mm wide, and the second tab scrap 2 is 2.54 mm. The difference in tabs between the two schemes is 6.5 + 2.54 - 0.54 = 8.5 (mm). Thus, the pitch size is greatly reduced from 28 mm to 19.5 mm, improving the material utilization rate.

[0111] Based on the same utility model concept, an embodiment of the present utility model further provides a material guiding structure, which is applied to the above-mentioned straight stator strip to fix the first support portion 11 and the second support portion 12 formed by bending both sides of the straight stator strip, realizing stable high-speed stamping traction feeding and ensuring that the strip is not easily bent or folded.

[0112] The material guiding structure includes a first material guiding structure 16 and a second material guiding structure 17. The first material guiding structure 16 and the second material guiding structure 17 are arranged opposite to each other. The first material guiding structure 16 is provided with a first profiling groove 161, and a first opening 162 is arranged on one side of the first profiling groove 161. The second material guiding structure 17 is provided with a second profiling groove 171, and a second opening 172 is arranged on one side of the second profiling groove 171. The first opening 162 and the second opening 172 are arranged opposite to each other. The first profiling groove 161 is adaptively fitted with the first support portion 11, and the second profiling groove 171 is adaptively fitted with the second support portion 12.

[0113] The shape of the first profiling groove 161 is adapted to the shape of the first support portion 11. It only needs to ensure that the first support portion 11 can slide into the first profiling groove 161 and be positioned and clamped by the first profiling groove 161. The shape of the second support portion 12 is adapted to the shape of the second profiling groove 171. Similarly, it only needs to ensure that the second support portion 12 can freely slide into the second profiling groove 171 and the second support portion 12 can be positioned and clamped by the groove wall of the second profiling groove 171.

[0114] In some embodiments, the first support portion 11 and the second support portion 12 are bent into an L shape. Correspondingly, the first profiling groove 161 and the second profiling groove 171 are both designed to be L-shaped.

[0115] The first support portion 11 formed by bending one side of the punching sheet strip is clamped and embedded in the first profiling groove 161, and the second support portion 12 formed by bending the other side of the punching sheet strip is clamped and embedded in the second profiling groove 171. The first support portion 11 is clamped and limited by the first profiling groove 161, and the second support portion 12 is clamped and limited by the second profiling groove 171. When the front feeder pushes the strip to move forward at a high speed, the two sides of the strip can overcome greater resistance and will not bend or fold. The first support portion 11 and the second support portion 12 ensure that the strip does not shift through the first profiling groove 161 and the second profiling groove 171, and pull the strip from both sides to form a strong support, and the middle of the strip is pulled forward under the thrust of the feeder to complete the feeding, solving the problem that the strip has poor strength and is easily deformed during feeding and cannot be produced normally.

[0116] Based on the same utility model concept, an embodiment of the present utility model further provides a stator, including the above-mentioned straight stator strip.

[0117] Based on the same utility model concept, an embodiment of the present utility model further provides a motor, including the above-mentioned stator.

[0118] The main functions of the present utility model are as follows:

[0119] 1. Bend both sides of the punching strip to form a first support portion 11 and a second support portion 12. The first support portion 11 and the second support portion 12 are similar to the principle of an angle steel structure, thereby greatly improving the anti-bending strength of the strip. After bending, it is equivalent to forming support rods on both sides of the strip, and the strength of both sides of the strip is greatly improved. When pulling the strip to move forward at high speed, the first support portion 11 and the second support portion 12 can overcome greater resistance. Embed the first support portion 11 into the first profiling groove 161 of the first material guiding structure 16 for limit fixation, and embed the second support portion 12 into the second profiling groove 171 of the second material guiding structure 17 for limit fixation. The strip does not shift, and strongly supports the strip from both sides, solving the problem that the high-speed stamping strip has poor strength and is prone to deformation during feeding.

[0120] 2. Design a first process groove 144 and a second process groove 134. Without changing the performance of the iron core product, ensure that when two products are separated into two, the key circular dimensions of the two columns are consistent and stable, solving the problem that the key circular dimensions fluctuate without the first process groove 144 and the second process groove 134, resulting in unstable dimensions after forming a circle.

[0121] 3. Adopt an interleave arrangement without waste material overlap between the first stator punching unit 13, the second stator punching unit 14, and the third stator punching unit 15, greatly reducing the pitch size, greatly improving the material utilization rate of the straight stator iron core, greatly reducing the usage amount of raw material silicon steel sheets, thereby reducing the cost of the iron core and energy consumption.

[0122] In summary, after a person of ordinary skill in the art reads the documents of the present utility model, all other corresponding transformation schemes made without creative mental labor according to the technical solutions and technical concepts of the present utility model fall within the scope protected by the present utility model.

Claims

1. A straight stator strip, characterized in that, Including: One side of the punching strip is bent to form a first supporting part, and the other side of the punching strip is bent to form a second supporting part. The first supporting part and the second supporting part are arranged oppositely. When punching and feeding, the first supporting part is slidably inserted into the first profiling groove of the first guiding structure and fixed, and the second supporting part is slidably inserted into the second profiling groove of the second guiding structure and fixed.

2. The straight stator strip according to claim 1, characterized in that, The first supporting part includes a first transition connecting edge and a first fixed connecting edge. One side of the first transition connecting edge is connected to the punching strip, and the other side of the first transition connecting edge is connected to the first fixed connecting edge. The included angle between the first transition connecting edge and the first fixed connecting edge is an acute angle or a right angle.

3. The straight stator strip according to claim 2, characterized in that, The second supporting part includes a second transition connecting edge and a second fixed connecting edge. One side of the second transition connecting edge is connected to the punching strip, and the other side of the second transition connecting edge is connected to the second fixed connecting edge. The included angle between the second transition connecting edge and the second fixed connecting edge is an acute angle or a right angle.

4. A straight stator strip according to claim 1, wherein, Both the first supporting part and the second supporting part are in an L shape.

5. A straight stator strip according to any one of claims 1-4, characterized in that During the layout production process of the straight stator strip, multiple stator punching units are produced simultaneously in the layout. The multiple stator punching units include a first stator punching unit and a second stator punching unit; The first stator punching unit is provided with a first stator tooth and a first stator yoke portion. The inner end surface of the first stator yoke portion extends out of the first stator tooth; The second stator punching unit is provided with a second stator tooth and a second stator yoke portion. The inner end surface of the second stator yoke portion extends out of the second stator tooth; The outer end surface of the first stator yoke portion is attached and connected to the outer end surface of the second stator yoke portion.

6. A straight stator strip according to claim 5, characterized in that, A first circular deformation area is provided between the inner end surfaces of adjacent first stator yoke portions. A first process groove is provided on the outer end surface of the second stator yoke portion. The first process groove and the first circular deformation area are arranged oppositely. The outer cut of the first process groove is attached to the connection of the outer end surface of the second stator yoke portion.

7. The straight stator strip according to claim 6, wherein A second circular deformation area is provided between the inner end surfaces of adjacent second stator yoke portions. A second process groove is provided on the outer end surface of the first stator yoke portion. The second process groove and the second circular deformation area are arranged oppositely. The outer cut of the second process groove is attached to the connection of the outer end surface of the first stator yoke portion.

8. A straight stator strip according to claim 7, characterized in that, The distance between the inner cut of the first process groove and the first circular deformation area is greater than 1.0 mm. The inner cut and the outer cut of the first process groove are arranged oppositely. The inner cut of the first process groove is located on the second stator yoke portion.

9. A straight stator strip according to claim 7 or 8, characterized in that The distance between the inner cut of the second process groove and the second circular deformation area is greater than 1.0 mm. The inner cut and the outer cut of the second process groove are arranged oppositely. The inner cut of the second process groove is located on the first stator yoke portion.

10. A straight stator strip according to claim 9, characterized in that, The distance between the outer cut of the first process groove and the second circular deformation area is 0.5 mm. The distance between the outer cut of the second process groove and the first circular deformation area is 0.5 mm.

11. A straight stator strip according to claim 10, characterized in that, The groove depth of the first process groove and the second process groove is greater than 1.5 times the material thickness of the punching strip. The groove width of the first process groove and the second process groove is greater than 2.0 mm.

12. A straight stator strip according to claim 11, characterized in that, It further includes a third stator punching unit, the third stator punching unit is provided with third stator teeth and a third stator yoke portion, the inner end surface of the third stator yoke portion extends out the third stator teeth, the third stator teeth are interspersed between adjacent first stator teeth, a third process groove is provided on the third stator yoke portion, and the outer cut of the third process groove is attached to the outer end surface of the third stator yoke portion.

13. A material guiding structure, characterized in that, Applied to a straight stator strip as described in any one of claims 1-4, 6-8, 10-12 above, the guiding structure includes a first guiding structure and a second guiding structure, the first guiding structure and the second guiding structure are arranged oppositely, the first guiding structure is provided with a first profiling groove, one side of the first profiling groove is provided with a first opening, the second guiding structure is provided with a second profiling groove, one side of the second profiling groove is provided with a second opening, the first opening and the second opening are arranged oppositely, the first profiling groove is fitted and engaged with the first supporting portion, and the second profiling groove is fitted and engaged with the second supporting portion.

14. A material guiding structure according to claim 13, characterized in that, Both the first profiling groove and the second profiling groove are in an L shape.

15. A stator, characterized in that, It includes a straight stator strip as described in any one of claims 1-4, 6-8, 10-12.

16. A motor, characterized in that, It includes a stator as described in claim 15.

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