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

Abstract

The invention discloses a straight-strip stator material belt, a material guiding structure, a stator and a motor, the straight-strip stator material belt comprises a first supporting part formed by bending one side of a punching sheet material belt, a second supporting part formed by bending the other side of the punching sheet material belt, 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 present invention relates to the technical field of motors, and in particular to a straight stator strip, a stator and a motor. Background Art

[0002] With the technological innovation in the industry, the BMC plastic-sealed structure replaces the transmission iron shell structure, cancels the requirement that the iron shell stator core has an arc shape, and the stator core shape is changed to a straight edge shape. At present, in the field of household motors, straight-bar stators have become the mainstream development direction, and the proportion of straight-bar structure stator cores is increasing. Two products can be inserted in the same punch without waste. In the traditional stamping layout, there is waste all around between the two products, and the material utilization rate is only about 40%. The product shape edge is changed from a circle to a straight edge, and the overlap waste between the two product shapes is reduced, but the material utilization rate is still low.

[0003] In the process of pushing the raw material silicon steel sheet strip forward at high speed, there is a problem that the strip strength is poor and it is easy to deform during feeding, making it difficult to achieve high-speed stamping. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a straight stator strip, a material guide structure, a stator and a motor to solve the problem of poor strength and easy deformation of the strip during high-speed stamping of the waste-free strip.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a straight stator strip, including: one side of the punching strip is bent to form a first support part, and the other side of the punching strip is bent to form a second support part, the first support part and the second support part are arranged opposite to each other, and during stamping and feeding, the first support part is slidably embedded in the first profiling groove of the first material guide structure and fixed, and the second support part is slidably embedded in the second profiling groove of the second material guide structure and fixed.

[0006] As a further improvement of the present invention: the first supporting portion includes a first transition lap and a first fixed lap, one side of the first transition lap is connected to the punching sheet material strip, the other side of the first transition lap is connected to the first fixed lap, and the angle between the first transition lap and the first fixed lap is an acute angle or a right angle.

[0007] As a further improvement of the present invention: the second supporting portion includes a second transition lap and a second fixed lap, one side of the second transition lap is connected to the punching sheet material strip, the other side of the second transition lap is connected to the second fixed lap, and the angle between the second transition lap and the second fixed lap is an acute angle or a right angle.

[0008] As a further improvement of the present invention: the first supporting portion and the second supporting portion are both L-shaped.

[0009] As a further improvement of the present invention: the straight stator material strip is simultaneously arranged to produce a plurality of stator punching units during the arrangement and production process, and the plurality of 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, and the first stator tooth extends from the inner end surface of the first stator yoke;

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

[0012] The outer end surface of the first stator yoke part is closely connected to the outer end surface of the second stator yoke part.

[0013] As a further improvement of the present invention: a first circular deformation area is provided between the inner end surfaces of adjacent first stator yoke parts, and a first process groove is provided on the outer end surface of the second stator yoke part. The first process groove is arranged opposite to the first circular deformation area, and an outer cutout of the first process groove is attached to the connection between the outer end surfaces of the first stator yoke part and the second stator yoke part.

[0014] As a further improvement of the present invention: a second circular deformation area is provided between the inner end surfaces of adjacent second stator yoke parts, a second process groove is provided on the outer end surface of the first stator yoke part, the second process groove is arranged opposite to the second circular deformation area, and the outer cutout of the second process groove is attached to the connection between the outer end surfaces of the second stator yoke part and the first stator yoke part.

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

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

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

[0018] As a further improvement of the present invention: 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 sheet, 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 invention: it also 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, the third stator tooth extends from the inner end surface of the third stator yoke, the third stator tooth is inserted between adjacent first stator teeth, the third stator tooth is provided on the third stator yoke, and the outer cutout of the third process groove is in contact with the outer end surface of the third stator yoke.

[0020] A material guide structure is applied to the above-mentioned straight stator material strip, the material guide structure includes a first material guide structure and a second material guide structure, the first material guide structure is arranged opposite to the second material guide structure, the first material guide structure is provided with a first profiling groove, one side of the first profiling groove is provided with a first opening, the second material guide structure is provided with a second profiling groove, one side of the second profiling groove is provided with a second opening, the first opening is arranged opposite to the second opening, the first profiling groove is adapted to fit with a first support portion, and the second profiling groove is adapted to fit with a second support portion.

[0021] As a further improvement of the present invention: the first profiling groove and the second profiling groove are both L-shaped.

[0022] A stator comprises the above-mentioned straight stator strip.

[0023] A motor comprises the above-mentioned stator.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention bends one side of the punching sheet material strip to form a first supporting portion, and bends the other side of the punching sheet material strip to form a second supporting portion. The first supporting portion and the second supporting portion are arranged opposite to each other. During stamping and feeding, the first supporting portion is embedded in the first profiling groove of the first material guide structure and is clamped and fixed. The second supporting portion is embedded in the second profiling groove of the second material guide structure and is 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 material strip from both sides to form a strong support. When the front-end feeder pushes the material strip forward, the bending of both sides of the material strip can overcome greater resistance, and the middle part of the material strip is not easy to bend or fold, thereby realizing the possibility of high-speed stamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a schematic structural diagram of a straight stator strip according to an embodiment of the present invention.

[0027] Figure 2 for Figure 1 A partial enlarged view of part O in the middle.

[0028] Figure 3 The figure is a schematic structural diagram of a straight stator strip arrangement according to an embodiment of the present invention.

[0029] Figure 4The figure is a side view of a straight stator strip according to an embodiment of the present invention.

[0030] Figure 5 for Figure 4 A partial enlarged view of part A.

[0031] Figure 6 for Figure 4 A partial enlarged view of part B.

[0032] Figure 7 This is a schematic diagram of a straight stator strip arrangement with two side bends and process grooves according to an embodiment of the present invention.

[0033] Figure 8 for Figure 7 A partial enlarged view of part C.

[0034] Fig. 9 for Figure 7 A partial enlarged view of part D.

[0035] Fig.10 It is a schematic structural diagram of the first stator punching unit arrangement according to an embodiment of the present invention.

[0036] Fig.11 The figure is a schematic diagram of the arrangement of a straight stator strip according to an embodiment of the present invention.

[0037] Fig.12 It is a conventional straight stator core structure plug-in solution in the prior art.

[0038] Fig.13 It is a product arrangement of two straight stator cores in the prior art.

[0039] Fig.14 This is a partial rendering of the insertion and stripping strips of two products of the straight stator core in the prior art.

[0040] Reference numerals:

[0041] 1. First side waste, 2. Second side waste, 3. First product, 4. Second product,

[0042] 10. Punching sheet strip, 101. Dividing line,

[0043] 11. first supporting portion, 111. first fixed overlap, 112. first transition overlap, 113. first limiting space,

[0044] 12. second supporting portion, 121. second fixed overlap, 122. second transition overlap, 123. second limiting space,

[0045] 13. a first stator punching unit, 131. a first stator tooth, 132. a first stator yoke, 1321. a first inner end surface, 1322. a first outer end surface, 133. a first circular deformation region, 134. a second process groove,

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

[0047] 15. a third stator punching unit, 151. a third stator tooth, 152. a third stator yoke, 1521. a third inner end surface, 1522. a third outer end surface, 153. a third circular deformation region, 154. a third process groove,

[0048] 16. a first material guide structure, 161. a first contoured groove, 162. a first opening, 163. a first fixing portion,

[0049] 17. A second material guiding structure, 171. A second contoured groove, 172. A second opening, 173. A second fixing portion. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0051] In order to solve the technical problems in the prior art, the present invention is further described in conjunction with the accompanying drawings and embodiments:

[0052] like Figures 1 to 11 As shown, an embodiment of the present invention 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 embedded in the first contoured groove 161 of the first material guide structure 16, and the second support portion 12 is embedded in the second contoured groove 171 of the second material guide structure 17.

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

[0054] In actual production, the first material guide structure 16 and the second material guide structure 17 in this embodiment are structures for fixing the material strip on the feeding mechanism. According to the shape and structure of the first support portion 11, the first material guide 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 sheet material strip is embedded in the first profiling groove 161 for fixation, and then one side of the punching sheet material strip is positioned and clamped by the first profiling groove 161.

[0055] Similarly, the second guide structure 17 is designed with a second profiling groove 171 according to the shape and structure of the second support portion 12, that is, the second support portion 12 is matched with the second profiling groove 171, so that the second support portion 12 on the other side of the punching sheet material strip is embedded in the second profiling groove 171 for fixation, and then the other side of the punching sheet material strip is positioned and clamped by the second profiling groove 171, so that the two sides of the punching sheet material strip are respectively fixed by the first guide structure 16 and the second guide structure 17. 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 material strip from both sides to form a strong support. When the front feeder pushes the material strip forward, the bending of both sides of the material strip can overcome the greater resistance, and the middle of the material strip is not easy to bend or fold.

[0056] For the straight stator strips arranged in a plug-in manner, after punching a product, the narrowest width of the strips is only 0.5mm at many places. Figure 8 Product picture 0.5mm size and Fig. 9 As shown, the strength of the middle range of the material strip is very weak, the material strip is very easy to deform, and the middle part is the product shape and cannot be changed. The strength of the material strip is improved by bending both sides of the material strip to form a first support part 11 and a second support part 12, so as to achieve stable feeding in high-speed stamping production and prevent folding or bending deformation.

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

[0058] There are waste overlaps all around the stator punching strip, and the first support portion 11 is formed on one side of the stator punching strip. The first transition overlap 112 and the first fixed overlap 111 are both edge wastes of the stator punching strip. One side of the strip is bent to form the first support portion 11, which effectively utilizes the edge waste and, at the same time, improves the strength of one side of the strip.

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

[0060] More preferably, the first angle formed by the first transition overlap 112 and the first fixed overlap 111 can be 90°, that is, the first transition overlap 112 and the first fixed overlap 111 form an L-shape. Then, the first profiling groove 161 on the first material guiding structure 16 is designed to be L-shaped, and the L-shaped first profiling groove 161 and the L-shaped first supporting portion 11 are interlocked and connected with each other, so that the first supporting portion 11 formed by bending one side of the punching sheet material strip is clamped and connected with 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 material strip can withstand greater resistance and will not easily fold or bend.

[0061] The first profiling groove 161 of this embodiment has a first opening 162, one end of the first supporting portion 11 is slidably embedded in the first profiling groove 161 through the first opening 162, the first transition overlap 112 is embedded in the side of the first profiling groove 161 provided with the first opening 162, and the first fixed overlap 111 is placed on the other side of the first profiling groove 161 away from the first opening 162.

[0062] In some embodiments, the first limiting space 113 is formed between the inner side of the first supporting portion 11 facing the second supporting portion 12 and the punching sheet strip 10 , and the first fixing portion 163 of the first material guiding structure 16 is embedded in the first limiting space 113 .

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

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

[0065] In some embodiments, the second support portion 12 includes a second transition lap 122 and a second fixed lap 121, one side of the second transition lap 122 is connected to the punching sheet material strip 10, and the other side of the second transition lap 122 is connected to the second fixed lap 121, and a second limiting space 123 is formed between the second fixed lap 121 and the second transition lap 122 toward the inner side of the first support portion 11.

[0066] The second support portion 12 is formed on the other side of the stator sheet material strip, and the second transition overlap 122 and the second fixed overlap 121 are both edge waste materials of the stator sheet material strip. The other side of the material strip is bent to form the second support portion 12, which effectively utilizes the edge waste material and improves the strength of the other side of the material strip at the same time. The first support portion 11 and the second support portion 12 formed by bending both sides of the material strip effectively improve the strength of both sides of the material strip, and cooperate with the first profiling groove 161 and the second profiling groove 171 of the first material guide structure 16 to greatly improve the bending strength.

[0067] The formation of the second limiting space 123, that is, an angle is formed between the second transition overlap 122 and the second fixed overlap 121. Preferably, the second angle formed by the second transition overlap 122 and the second fixed overlap 121 can be an acute angle or a right angle. Correspondingly, the second contoured groove 171 on the second material guide structure 17 is also specifically designed according to the connection, angle and shape of the second transition overlap 122 and the second fixed overlap 121.

[0068] More preferably, the first angle formed by the second transition overlap 122 and the second fixed overlap 121 can be 90°, that is, the second transition overlap 122 and the second fixed overlap 121 form an L-shape. 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 and the L-shaped second supporting portion 12 are interlocked and connected with each other, so that the second supporting portion 12 formed by bending on the other side of the punching sheet material 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 material strip can withstand greater resistance and will not easily fold or bend.

[0069] The second profiling groove 171 of this embodiment has a second opening 172, and one end of the second supporting portion 12 is slidably embedded in the second profiling groove 171 through the second opening 172, and the second transition overlap 122 is embedded in the side of the second profiling groove 171 provided with the second opening 172, and the second fixed overlap 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 embedded in 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 the inner wall of the second fixing portion 173 is the same as the shape formed by the inner wall of the second profiling groove 171 .

[0072] After being bent, the second support portion 12 forms a first limiting space 113 between the inner side of the first support portion 11 and the punching sheet strip 10. When the second support portion 12 is assembled with the second material guide structure 17, the second fixing portion 173 of the second material guide structure 17 is embedded in the second limiting space 123. In some cases, in order to make the second support portion 12 and the second contoured 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 support portion 12. In this way, the first fixing portion 163 of the second material guide structure 17 is fit and clamped with the first limiting space 113, and the first support portion 11 and the first material guide structure 16 are limited and clamped.

[0073] In the present embodiment, the first fixing portion 163 of the first material guide structure 16 is embedded in the first limiting space 113 formed by the first supporting portion 11 and the material strip body, and the inner side of the first fixing portion 163 abuts against the first supporting portion 11. It is understood that the first fixing portion 163 of the first material guide structure 16 is designed to form a clamping limit with the first supporting portion 11. Similarly, the design principle of the second material guide structure 17 is the same as that of the first material guide structure 16.

[0074] The second fixing portion 173 of the second material guide structure 17 is engaged and clamped with the second limiting space 123, and the second supporting portion 12 is limited and clamped with the second material guide structure 17, so that both sides of the material belt are limited and clamped to ensure that the material belt does not deviate, and the first material guide structure 16 and the second material guide structure 17 pull the material belt from both sides to form a strong support. Under the thrust of the feeding mechanism, the middle part of the material belt is pulled forward to complete the feeding, thereby solving the problem that the material belt is easy to deform during feeding and it is difficult to achieve high-speed stamping production.

[0075] The above-mentioned first support part 11, second support part 12 and designed first profiling groove 161 and second profiling groove 171 and other structures are applied to straight stator material strips without waste insertion, which improves the feeding stability during stamping and ensures that the material strip does not deviate or swing. At the same time, the material strip is not prone to bending or folding deformation during the feeding process.

[0076] In this embodiment, the middle area of ​​the straight stator strip body 10 is used for punching stator punching units. The straight stator strip is used to simultaneously produce a plurality of stator punching units during the production process.

[0077] The plurality of stator sheet units include a first stator sheet unit 13 and a second stator sheet unit 14; the first stator sheet unit 13 is provided with a first stator tooth 131 and a first stator yoke 132, the first stator tooth 131 extends from the inner end surface of the first stator yoke 132, the second stator sheet unit 14 is provided with a second stator tooth 141 and a second stator yoke 142, the second stator tooth 141 extends from the inner end surface of the second stator yoke 142, the first stator tooth 131 and the second stator tooth 141 are arranged in a back-to-back relationship, and the outer end surface of the first stator yoke 132 is fitted and connected to the outer end surface of the second stator yoke 142.

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

[0079] Furthermore, the first stator yoke portion 132 has a first inner end face 1321 and a first outer end face 1322, the first inner end face 1321 is provided with a first stator tooth 131, and the first outer end face 1322 is provided away from the first stator tooth 131, the second stator yoke portion 142 has a second inner end face 1421 and a second outer end face 1422, the second inner end face 1421 is provided with a second stator tooth 141, and the second outer end face 1422 is provided away from the second stator tooth 141, and the first outer end face 1322 and the second outer end face 1422 are provided in contact with each other.

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

[0081] By fitting the first stator yoke 132 of the first stator punching unit 13 and the second stator yoke 142 of the second stator punching unit 14 together, the first outer end face 1322 of the first stator yoke 132 and the second outer end face 1422 of the second stator yoke 142 are directly fitted together, thereby effectively eliminating the existing overlap structure between the first stator punching unit 13 and the second stator punching unit 14, and no overlap waste is generated between the first stator punching unit 13 and the second stator punching unit 14, thereby effectively improving the utilization rate of raw materials, that is, the first outer end face 1322 and the second outer end face 1422 are designed to be straight-edge end faces. When arranging, there is no need to reserve overlaps between adjacent stator punching units, thereby reducing material costs.

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

[0083] Similarly, multiple second stator punching units 14 are arranged along the material width direction, and multiple second stator punching units 14 are connected in sequence to form a second straight stator core punching. The second stator punching unit 14 at the head end is connected to the second stator punching unit 14 at the end to form a ring-shaped stator punching structure.

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

[0085] In some embodiments, a first circular deformation area 133 is provided between adjacent first stator yokes 132 on the first stator punching unit 13, and the opening of the first circular deformation area 133 is arranged toward the second stator tooth 141 of the second stator punching unit 14; the first circular deformation area 133 is arranged between the first inner end surfaces 1321 of adjacent first stator yokes 132.

[0086] In some embodiments, similarly, a second circular deformation area 143 is provided between adjacent second stator yokes 142 on the second stator punching unit 14, the opening of the second circular deformation area 143 is arranged toward the first stator tooth 131 of the first stator punching unit 13, and the second circular deformation area 143 is arranged between the second inner end surfaces 1421 of adjacent second stator yokes 142.

[0087] Two products are inserted and arranged on a straight stator strip. For example, the outer end face of the first stator yoke 132 is tangent to the outer end face of the second stator yoke 142 as a dividing line 101. When the two products are divided into two at the dividing line 101, due to the accumulated errors in various 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 area 133 to the outer end face of the first stator yoke 132, and from the second circular deformation area 143 to the outer end face of the second stator yoke 142, that is, the key dimensions of the first circular deformation area 133 and the second circular deformation are different, which directly affects the large difference in the dimensions of the two rows of circles and causes quality problems.

[0088] In some embodiments, the outer end surface of the second stator yoke 142 is provided with a first process groove 144, the first process groove 144 is arranged opposite to the first circular deformation area 133, and the outer cutout of the first process groove 144 is attached to the connection between the outer end surfaces of the first stator yoke 132 and the second stator yoke 142. Specifically, the first process groove 144 is provided on the first stator yoke 132, and the outer cutout of the first process groove 144 is attached to the first outer end surface 1322 of the first stator yoke 132, or in other words, the outer cutout of the first process groove 144 is attached to the second outer end surface 1422 of the second stator yoke 142.

[0089] In some embodiments, the outer end surface of the first stator yoke 132 is provided with a second process groove 134, the second process groove 134 is arranged opposite to the second circular deformation area 143, and the outer cutout of the second process groove 134 is attached to the connection between the second stator yoke 142 and the outer end surface of the first stator yoke 132. Specifically, the second process groove 134 is provided on the second stator yoke 142, and the outer cutout of the second process groove 134 is attached to the first outer end surface 1322 of the first stator yoke 132, or in other words, the outer cutout of the second process groove 134 is attached to the second outer end surface 1422 of the second stator yoke 142.

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

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

[0092] When the strip is arranged in a row, the first process groove 144 is the joint surface position of the first stator punching unit 13 product / the second stator punching unit 14 product, that is, the joint position of the process groove relative to the circular deformation area. When stamping, the first process groove 144, the second process groove 134 and the joint surface are first punched out on the strip before the two products are divided into two at the dividing line 101. This solves the problem that when there is no first process groove 144 and second process groove 134, the key dimensions of the two products divided into two circles fluctuate, resulting in unstable dimensions after the circle is formed, and ensures the stability and uniformity of the two rows of products.

[0093] The critical circle dimension is designed to be 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 without 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 critical circle dimension is designed to be 0.5 mm, the first process groove 144 is required to be more than 2.0 mm to ensure that the second circle deformation area 143 is free. Similarly, the groove width of the second process groove 134 is required to be more than 2.0 mm to ensure that the second circle deformation area 143 is free.

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

[0097] The inner cutout of the first process groove 144 is away from the second outer end surface 1422 of the second stator yoke 142. Preferably, the inner cutout and the outer cutout of the first process groove 144 are parallel to each other, and the first process groove 144 can be designed as a rectangular groove. Generally, there is a spacing of more than 1.0 mm between the inner cutout and the outer cutout 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 critical dimension of the circle is designed to be 0.5 mm, Fig. 9 The mark h shown is 0.5 mm, the distance between the inner cutout of the second process groove 134 and the second circular deformation area 143 is greater than 1.0 mm, the inner cutout and the outer cutout of the second process groove 134 are arranged opposite to each other, and the inner cutout of the second process groove 134 is located on the first stator yoke 132 .

[0099] The inner cutout of the second process groove 134 is away from the first outer end surface 1322 of the first stator yoke 132. Preferably, the inner cutout and the outer cutout of the second process groove 134 are parallel to each other, and the second process groove 134 can be designed as a rectangular groove. Generally, there is a spacing greater than 1.0 mm between the inner cutout and the outer cutout 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, a third stator punching sheet unit 15 is further included. In the pitch direction of the straight stator core material strip, the third stator punching sheet unit 15, the first stator punching sheet unit 13, and the second stator punching sheet unit 14 are connected in sequence, and the pitch direction is perpendicular to the material width direction.

[0101] Furthermore, the third stator punching unit 15 is provided with a third stator tooth 151 and a third stator yoke 152, and the third stator tooth 151 extends from the third inner end surface 1521 of the third stator yoke 152, and the third stator tooth 151 is inserted between adjacent first stator teeth 131, and the first stator teeth 131 are inserted 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, the other end of the third stator tooth 151 extends toward the first stator punching unit 13, and the other end of the third stator tooth 151 is arranged near the first stator yoke 132, the other end of the first stator tooth 131 extends toward the third stator yoke 152, and the other end of the first stator yoke 132 is arranged near the third stator yoke 152.

[0103] Furthermore, a third circular deformation region 153 is provided between adjacent third stator yokes 152 on the third stator punching unit 15 , and an opening of the third circular deformation region 153 is arranged toward the other end of the first stator tooth 131 .

[0104] A third process groove 154 is provided on the third stator yoke 152 , and an outer cutout of the third process groove 154 is in contact with an outer end surface of the third stator yoke 152 .

[0105] When the third outer end surface 1522 of the third stator yoke 152 is spliced ​​to the first stator yoke 132 , the outer cutout of the third process groove 154 is fitted and connected to the first outer end surface 1322 of the first stator yoke 132 .

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

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

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

[0109] The above arrangement greatly improves the utilization rate of the straight stator core material, greatly reduces the material strip pitch, and greatly reduces the use of raw material silicon steel sheets. Fig.12 , Fig.13 , Fig.11 The material width and pitch comparison, product structure changes and the implementation of the waste-free plug-in process have reduced the use of silicon steel sheets by about 38%, thereby reducing the cost of the core and reducing energy consumption. By using the strength principle of angle steel, the two sides of the material strip are bent and formed, which greatly increases the strength of the two sides of the material strip, thereby pulling the middle part of the material strip forward, making it difficult for the material strip to fold or bend, and achieving high-speed stamping. This solves the problem of high-speed feeding of waste-free plug-in strips with poor strength in the industry.

[0110] Figures 11 to 14 In the figure, number 3 is the first product, number 4 is the second product, Fig.13 , Fig.11 In the middle, there are two products with no waste, no waste in one direction, and the minimum width in one direction is only 0.54mm. Fig.11 The first edge waste 1 shown, compared Fig.13 There is a waste strip, and the product has waste around it, such as Fig.13 The first overlap waste material 1 is 6.5 mm wide, and the second overlap waste material 2 is 2.54 mm wide. The overlap difference between the two schemes is 6.5+2.54-0.54=8.5 (mm), thereby greatly reducing the step size from 28 mm to 19.5 mm, thereby improving material utilization.

[0111] Based on the same inventive concept, an embodiment of the present invention also provides a material guiding structure, which is applied to the above-mentioned straight stator material strip to fix the first support part 11 and the second support part 12 formed by bending the two sides of the straight stator material strip, so as to achieve stable high-speed stamping and traction feeding and ensure that the material 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 provided 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 provided 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 adapted to fit with the first supporting portion 11, and the second profiling groove 171 is adapted to fit with the second supporting portion 12.

[0113] The shape of the first profiling groove 161 is adapted to the shape of the first supporting portion 11, and it is only necessary to ensure that the first supporting portion 11 can be slidably embedded in the first profiling groove 161 and is positioned and clamped by the first profiling groove 161. The shape of the second supporting portion 12 is adapted to the shape of the second profiling groove 171. Similarly, it is only necessary to ensure that the second supporting portion 12 can freely slide and be embedded in the second profiling groove 171, and the second supporting portion 12 can be positioned and clamped by the groove wall of the second profiling groove 171.

[0114] In some embodiments, the first supporting portion 11 and the second supporting portion 12 are bent into an L-shape, and 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 material strip is embedded in the first profiling groove 161, and the second support portion 12 formed by bending the other side of the punching sheet material strip is 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-end feeder pushes the material strip forward in height, the bending of both sides of the material strip can overcome greater resistance and will not bend or fold. The first support portion 11 and the second support portion 12 pass through the first profiling groove 161 and the second profiling groove 171 to ensure that the material strip does not deviate, and the material strip is pulled from both sides to form a strong support. Under the thrust of the feeder, the middle part of the material strip is pulled forward to complete the feeding, thereby solving the problem that the material strip has poor strength and is easy to deform during feeding and cannot be produced normally.

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

[0117] Based on the same inventive concept, an embodiment of the present invention further provides a motor, comprising the above-mentioned stator.

[0118] The main functions of the present invention are:

[0119] 1. The two sides of the punching sheet material strip are bent to form a first support part 11 and a second support part 12. The first support part 11 and the second support part 12 are similar to the angle steel structure principle, so as to greatly improve the bending strength of the material strip. After bending, it is equivalent to forming support rods on both sides of the material strip. The strength of both sides of the material strip is greatly improved. When the material strip is pulled forward at high speed, the first support part 11 and the second support part 12 can overcome the large resistance, and the first support part 11 is embedded in the first profiling groove 161 of the first material guide structure 16 for limit fixation, and the second support part 12 is embedded in the second profiling groove 171 of the second material guide structure 17 for limit fixation. The material strip does not deviate, and the material strip is pulled from both sides to form a strong support, which solves the problem of high-speed stamping material strip with poor strength and easy deformation during feeding.

[0120] 2. Design the first process groove 144 and the second process groove 134 without changing the performance of the core product, ensuring that when the two products are divided into two, the two columns of key rounding dimensions are consistent and stable, thereby solving the problem of unstable dimensions after rounding caused by fluctuations in key rounding dimensions when there are no first process groove 144 and the second process groove 134.

[0121] 3. The first stator punching unit 13, the second stator punching unit 14, and the third stator punching unit 15 are arranged in an arrangement manner without any waste overlap, which greatly reduces the step size, greatly improves the material utilization rate of the straight stator core, and greatly reduces the use of raw material silicon steel sheets, thereby reducing the core cost and energy consumption.

[0122] In summary, after reading the present invention document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical scheme and technical concept of the present invention without creative mental work, which all fall within the scope of protection of the present invention.

Claims

1. A straight stator strip, characterized in that: include: One side of the punching sheet material strip is bent to form a first support portion, and the other side of the punching sheet material strip is bent to form a second support portion. The first support portion and the second support portion are arranged opposite to each other. During punching and feeding, the first support portion is slidably inserted into the first contoured groove of the first material guide structure and fixed, and the second support portion is slidably inserted into the second contoured groove of the second material guide structure and fixed.

2. A straight stator strip according to claim 1, characterized in that: The first supporting portion includes a first transition lap and a first fixed lap, one side of the first transition lap is connected to the punching sheet material strip, the other side of the first transition lap is connected to the first fixed lap, and the angle between the first transition lap and the first fixed lap is an acute angle or a right angle.

3. A straight stator strip according to claim 2, characterized in that: The second supporting portion includes a second transition lap and a second fixed lap, one side of the second transition lap is connected to the punching sheet material strip, the other side of the second transition lap is connected to the second fixed lap, and the angle between the second transition lap and the second fixed lap is an acute angle or a right angle.

4. The straight stator strip according to claim 1, characterized in that: The first supporting portion and the second supporting portion are both L-shaped.

5. A straight stator strip according to any one of claims 1 to 4, characterized in that: The straight stator material strip is simultaneously arranged to produce a plurality of stator punching sheet units during the arrangement and production process, and the plurality of stator punching sheet units include a first stator punching sheet unit and a second stator punching sheet unit; The first stator punching unit is provided with a first stator tooth and a first stator yoke, and the first stator tooth extends from the inner end surface of the first stator yoke; The second stator punching unit is provided with a second stator tooth and a second stator yoke, and the second stator tooth extends from the inner end surface of the second stator yoke; The outer end surface of the first stator yoke part is closely connected to the outer end surface of the second stator yoke part.

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 parts, and a first process groove is provided on the outer end surface of the second stator yoke part. The first process groove is arranged opposite to the first circular deformation area, and the outer cutout of the first process groove is attached to the connection of the outer end surface of the second stator yoke part.

7. A straight stator strip according to claim 6, characterized in that: A second circular deformation area is provided between the inner end faces of adjacent second stator yoke parts, and a second process groove is provided on the outer end face of the first stator yoke part. The second process groove is arranged opposite to the second circular deformation area, and the outer cutout of the second process groove is attached to the connection of the outer end face of the first stator yoke part.

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

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

10. The straight stator strip according to claim 9, characterized in that: The distance between the outer cutout of the first process groove and the second circular deformation area is 0.5 mm, and the distance between the outer cutout 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 sheet, and the groove width of the first process groove and the second process groove is greater than 2.0 mm.

12. The straight stator strip according to claim 11, characterized in that: It also includes a third stator punching sheet unit, which is provided with a third stator tooth and a third stator yoke. The third stator tooth extends from the inner end surface of the third stator yoke, and the third stator tooth is inserted between adjacent first stator teeth. The third stator yoke is provided with a third process groove, and the outer cutout of the third process groove is in contact with the outer end surface of the third stator yoke.

13. A material guiding structure, characterized in that: A straight stator strip applied to any one of claims 1-4, 6-8, 10-12, wherein the material guide structure comprises a first material guide structure and a second material guide structure, the first material guide structure and the second material guide structure are arranged opposite to each other, the first material guide structure is provided with a first profiling groove, one side of the first profiling groove is provided with a first opening, the second material guide 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 opposite to each other, 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: The first profiling groove and the second profiling groove are both L-shaped.

15. A stator, characterized in that: A straight stator strip comprising any one of claims 1-4, 6-8, 10-12.

16. A motor, characterized in that: A stator comprising the stator as claimed in claim 15.

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