Stator punching sheet, stator core and motor
By designing multiple magnetic conductive sections and setting grooves and notches in the yoke of the stator laminations, and using lubricating oil, the problem of low stamping accuracy of the stator lamination clearance grooves was solved, and high-precision stator lamination production was achieved.
Patent Information
- Application Number
- CN202423166271.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-20
AI Technical Summary
In the existing technology, it is difficult to guarantee the stamping accuracy of the relief groove of the stator lamination, which leads to a decrease in the pass rate of the stator lamination.
The yoke of the stator lamination is designed to consist of multiple magnetically conductive segments connected sequentially along the circumference. The outer side of the magnetically conductive segments is provided with grooves and notches, with the notches located at one end of the joint. Combined with the use of lubricating oil, the stamping process is optimized.
This improved the stamping accuracy of the relief groove, reduced friction and wear of the stator laminations and the need for secondary processing, and improved the overall processing accuracy and pass rate of the stator laminations.
Smart Images
Figure CN223583895U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor technical field, in particular to a kind of stator lamination, stator core and motor. BACKGROUND
[0002] Stator lamination can be produced using straight bar type stator during manufacturing stage. For example, the shape of stator lamination is punched on plate material, and then the stator lamination is separated from the plate material. Since the stator lamination is in straight bar shape, it needs to be bent into ring structure before finally forming the stator lamination, and finally a plurality of stator laminations are stacked along the axial direction to form a stator core. Since the straight bar stator lamination needs to be bent to form a complete stator lamination, a plurality of V-shaped accommodation grooves are provided between the yoke portions of the stator lamination to allow the straight bar stator lamination to be bent smoothly. However, under the existing punching method, it is difficult to ensure the punching accuracy of the accommodation grooves, resulting in a decrease in the pass rate of the stator lamination. SUMMARY
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a stator lamination, which can improve the punching accuracy of the accommodation grooves and improve the pass rate of the stator lamination.
[0004] The utility model further provides a stator core and a motor having the above-mentioned stator lamination.
[0005] According to the stator lamination of the first aspect of the utility model, the yoke portion includes a plurality of magnetic conduction segments, and the plurality of magnetic conduction segments are connected in sequence along the circumference of the stator lamination. The outer side of the magnetic conduction segment is provided with a sink groove and a notch. A plurality of stator teeth are provided, and the number of stator teeth is the same as the number of magnetic conduction segments. The plurality of stator teeth are connected one by one to the inner side of the plurality of magnetic conduction segments. The joint is formed between the adjacent two magnetic conduction segments, and the notch is located at one end of the magnetic conduction segment close to the joint.
[0006] According to the stator lamination of the utility model, at least the following beneficial effects are achieved:
[0007] By setting the yoke portion to include a plurality of magnetically conductive segments connected in sequence along the circumference, and a plurality of stator teeth and the inner side of the magnetically conductive segments are connected one by one, the outer side of the magnetically conductive segment is provided with a sink groove and a notch, and the notch is located at one end of the magnetically conductive segment close to the joint. Wherein, the joint is a structure formed at the accommodation groove after the yoke portion is bent. In the process of separating the stator punching sheet from the plate, the setting of the sink groove is beneficial to the penetration of lubricating oil into the plate, which can solve the problem that the cutting tool is easy to rub and wear with the stator punching sheet during the punching process, and at the same time, reduce the residual long excess material at the corner of the stator punching sheet after punching, so as to reduce the secondary processing and improve the overall machining precision of the stator punching sheet. In addition, the notch and the sink groove can reduce the connection length of the magnetically conductive segment and the plate, so that the stator punching sheet is more easily separated from the plate at the accommodation groove and the sink groove, realizing one-time blanking and further improving the punching precision of the accommodation groove.
[0008] According to some embodiments of the present application, the intersection of the outer edge of the magnetically conductive segment and the extension line of the joint is an end point, the end close to the joint of each of the two adjacent magnetically conductive segments is provided with the notch, the two notches located on both sides of the joint are respectively a first notch and a second notch, the maximum distance between the end away from the joint of the first notch and the end point is W1, the maximum distance between the end away from the joint of the second notch and the end point is W5, and the minimum distance between the end close to the joint of the first notch and the end point is W2, satisfying: 0.1≤W2 / (W1+W5)≤0.5.
[0009] According to some embodiments of the present application, the maximum thickness of the magnetically conductive segment is h0, and the maximum depth of the notch is h1, satisfying: 0.02≤h1 / h0≤0.2.
[0010] According to some embodiments of the present application, along the circumference of the stator punching sheet, the sink groove is located in the middle of the magnetically conductive segment.
[0011] According to some embodiments of the present application, along the circumference of the stator punching sheet, the maximum width of the sink groove is W3, the intersection of the outer edge of the magnetically conductive segment and the extension line of the joint is an end point, the end close to the joint of each of the two adjacent magnetically conductive segments is provided with the notch, the two notches located on both sides of the joint are respectively a first notch and a second notch, the maximum distance between the end away from the joint of the first notch and the end point is W1, the maximum distance between the end away from the joint of the second notch and the end point is W5, and satisfying: 0.9≤(W1+W5) / W3≤1.1.
[0012] According to some embodiments of the present application, the maximum thickness of the magnetically conductive segment is h0, the maximum depth of the notch is h1, and the maximum depth of the sink groove is h3, satisfying: 0.08≤(h3-h1) / h0≤0.3.
[0013] According to some embodiments of the present application, the stator tooth comprises a tooth portion and a tooth shoe portion, one end of the tooth portion is connected to the inner side of the magnetic conducting segment, the tooth shoe portion is connected to the end of the tooth portion away from the magnetic conducting segment, and a groove is arranged on one side of the tooth portion.
[0014] According to some embodiments of the present application, along the circumferential direction of the stator punching sheet, the maximum depth of the groove is h4, and the maximum width of the tooth portion is W4, and the following condition is met: 0.1≤h4 / W4≤0.25.
[0015] According to the stator core of the second aspect of the present application, the stator core comprises the stator punching sheet of the above embodiments.
[0016] According to the stator core of the present application, at least the following beneficial effects are achieved:
[0017] By using the stator punching sheet of the first aspect of the present application, the stator punching sheet is provided with the yoke portion comprising a plurality of magnetic conducting segments connected in sequence along the circumferential direction, and the plurality of stator teeth and the inner side of the magnetic conducting segment are connected one by one, the outer side of the magnetic conducting segment is provided with a sink groove and a notch, and the notch is located at the end of the magnetic conducting segment close to the joint. The joint is a structure formed at the clearance groove after the yoke portion is bent. In the process of separating the stator punching sheet from the plate, the sink groove is beneficial to the penetration of lubricating oil into the plate, which can solve the problem that the cutting tool is easily rubbed and worn with the stator punching sheet during the punching process, and at the same time, reduce the residual long material at the corner of the stator punching sheet after punching, so as to reduce the secondary processing and improve the overall machining precision of the stator punching sheet. In addition, the notch and the sink groove can reduce the connection length of the magnetic conducting segment and the plate, so that the stator punching sheet is more easily separated from the plate at the clearance groove and the sink groove, realizes one-time blanking, and further improves the punching precision of the clearance groove.
[0018] According to the motor of the third aspect of the present application, the motor comprises the stator core of the above embodiments.
[0019] According to the motor of the present application, at least the following beneficial effects are achieved:
[0020] By adopting the stator core of the second aspect embodiment, the stator lamination of the stator is provided with the yoke part comprising a plurality of magnetic conductive segments connected in sequence in the circumferential direction, and the plurality of stator teeth and the inner side of the magnetic conductive segments are connected in one-to-one correspondence, the outer side of the magnetic conductive segment is provided with a sink groove and a notch, and the notch is located at one end of the magnetic conductive segment close to the joint. The joint is a structure formed at the clearance groove after the yoke part is bent. In the process of separating the stator lamination from the plate, the sink groove is beneficial to the penetration of lubricating oil into the plate, which can solve the problem that the cutting tool is easy to rub and wear the stator lamination during the punching process, and at the same time, the stator lamination is provided with a long residual material at the corner after punching, so as to reduce the secondary processing and improve the overall machining precision of the stator lamination. In addition, the notch and the sink groove can reduce the connection length of the magnetic conductive segment and the plate, so that the stator lamination is more easily separated from the plate at the clearance groove and the sink groove, realizes one-time blanking, and further improves the punching precision of the clearance groove.
[0021] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS
[0022] The present application will be further described below in conjunction with the drawings and embodiments, wherein:
[0023] Figure 1 is a structural schematic view of the plate and the prefabricated punching piece of an embodiment of the present application;
[0024] Figure 2 is a structural schematic view of the prefabricated punching piece of an embodiment of the present application;
[0025] Figure 3 is Figure 1 an enlarged view of A in FIG. 1;
[0026] Figure 4 is Figure 2 an enlarged view of B in FIG. 1;
[0027] Figure 5 is a structural schematic view of the stator lamination of an embodiment of the present application;
[0028] Figure 6 is Figure 5 an enlarged view of C in FIG. 1;
[0029] Figure 7 is a partial structural schematic view of the yoke part of another embodiment of the present application;
[0030] Figure 8 is a partial structural schematic view of the yoke part of another embodiment of the present application;
[0031] Figure 9is a partial structure schematic view of a prefabricated punching sheet of another embodiment of the utility model;
[0032] Figure 10 is a partial structure schematic view of a prefabricated punching sheet of another embodiment of the utility model.
[0033] Reference Signs:
[0034] Stator punching sheet 1000;Yoke part 100;Permeability segment 110;Notch 111;First notch 1111;Second notch 1112;Sunk groove 112;Joint 120;Endpoint 121;Through hole 130;Stator tooth 200;Tooth part 210;Groove 211;Tooth shoe part 220;Prefabricated punching sheet 300;Let go of slot 310;Plate 400;Guide hole 410. DETAILED DESCRIPTION
[0035] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.
[0036] In the description of the utility model, it is understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as the limitation of the utility model.
[0037] In the description of the utility model, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, more than etc. is understood as not including the number, above, below, within etc. is understood as including the number. If the first, the second is described, only for distinguishing the technical features for the purpose, and therefore cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.
[0038] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection etc. should be broadly understood, and the person skilled in the art can determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.
[0039] The stator core of the motor is formed by axially stacking a plurality of stator punching sheets. The form of the stator is generally divided into four types: whole circle type, block type, coiled type and straight strip type. In the production process, the whole circle type stator needs to punch out a complete annular stator punching sheet, so the material utilization rate of the whole circle type stator is low, and the winding speed is slow; each stator unit of the block type stator needs to be wound separately, and the wire ends are treated after splicing, which has many processes and is complex, and the circle precision is low; the structure of the coiled type stator is complex, and the process is difficult; the straight strip type stator has comprehensive advantages in the above aspects, so it is the most widely used in fan motors.
[0040] Referring to Figure 1 and Figure 2 When producing the straight strip type stator punching sheet 1000, a plurality of straight strip-shaped punching sheets need to be punched out on the plate 400. For convenience, the straight strip-shaped punching sheet is referred to as a preformed punching sheet 300, and the structure after the two ends of the preformed punching sheet 300 are bent and connected into a ring is referred to as a stator punching sheet 1000. The preformed punching sheet 300 is generally in a staggered plug-in row pattern, and the tooth portions 210 of the two rows of preformed punching sheets 300 are staggered and plugged to form a group of punching sheets. The yoke portions 100 of the preformed punching sheets 300 of adjacent two groups are connected to improve the material utilization rate.
[0041] Referring to Figure 3 and Figure 4 Since the preformed punching sheet 300 needs to be bent to connect the two ends to each other to form the ring-shaped stator punching sheet 1000, in order to enable the preformed punching sheet 300 to be smoothly bent, a V-shaped accommodation groove 310 is arranged on the inner side of the yoke portion 100 to improve the adverse effects such as wrinkles and protrusions of the preformed punching sheet 300 during the bending process. Since the preformed punching sheet 300 is in a straight strip shape, uneven stress on the plate 400 during the punching process will cause the size of the accommodation groove 310 to change, and the difficulty of separating the preformed punching sheet 300 from the plate 400 is great, thereby affecting the manufacturing precision of the accommodation groove 310.
[0042] In order to improve the manufacturing precision of the accommodation groove 310, referring to Figure 5 and Figure 6As shown, the stator lamination 1000 of the embodiment of the utility model can be used for the stator of the motor. The stator lamination 1000 of the embodiment of the utility model comprises a yoke 100 and a plurality of stator teeth 200, the yoke 100 comprises a plurality of magnetic conductive segments 110, the plurality of magnetic conductive segments 110 are sequentially connected along the circumference of the stator lamination 1000, and the outer side of the magnetic conductive segment 110 is provided with a sink groove 112. The number of the stator teeth 200 is same as the number of the magnetic conductive segments 110, for example, both are twelve, of course, can also be fourteen, ten, eight and so on. The plurality of stator teeth 200 are one-to-one corresponding connection on the inner side of the plurality of magnetic conductive segments 110, the connection mode is integrally formed, the inner side of the magnetic conductive segment 110 refers to the side of the magnetic conductive segment 110 towards the center line of the stator lamination 1000. Among them, the winding slot is formed between the adjacent stator teeth 200, and the winding of the motor is wound on the stator tooth 200 and is threaded in the winding slot. The stator lamination 1000 is made of silicon steel sheet, so the stator tooth 200 plays a role of connecting the winding and the magnetic circuit.
[0043] Referring to Figure 4 As shown, the inner side of the yoke 100 is also provided with a let slot 310, and the let slot 310 is located between the adjacent stator teeth 200. Among them, one let slot 310 is arranged between every two adjacent stator teeth 200. Referring to Figure 6 As shown, when the preformed lamination 300 is bent to form the stator lamination 1000 in Figure 5 Because the let slot 310 is extruded by the adjacent two magnetic conductive segments 110, therefore, the joint 120 is formed between the adjacent two magnetic conductive segments 110, and the joint 120 is the structure formed by the two ends of the magnetic conductive segment 110 abutting after extruding the let slot 310. The outer side of the magnetic conductive segment 110 is provided with a notch 111, and the notch 111 is located at one end of the magnetic conductive segment 110 close to the joint 120. It should be noted that the magnetic conductive segment 110 can be provided with the notch 111 at both ends, or only one end is provided with the notch 111. The bottom wall of the notch 111 can be arc-shaped. Or referring to Figure 7 As shown, the cross-sectional shape of the notch 111 is rectangular; or referring to Figure 8 As shown, the cross-sectional shape of the notch 111 is triangular. Of course, the shape of the notch 111 can also be other shapes, for example, semicircular, and the appropriate scheme is selected according to the actual situation.
[0044] It can be understood that, by using the above scheme, since the prefabricated punching sheet 300 in the production process is generally in a staggered and inserted row pattern, the tooth portions 210 of the two rows of prefabricated punching sheets 300 are staggered and inserted to form a group of punching sheets, and the yoke portions 100 of the prefabricated punching sheets 300 of the adjacent two groups are connected. After the setting of the sink groove 112, the lubricating oil is beneficial to penetrate into the plate 400, and the problem that the cutting tool is easily rubbed and worn with the prefabricated punching sheet 300 during the punching process can be solved, and at the same time, the residual slender excess material at the corner of the prefabricated punching sheet 300 after punching is reduced, so as to reduce the secondary processing condition and improve the overall machining precision of the prefabricated punching sheet 300. And the gap 111 is arranged on the outside of the magnetic conduction section 110, and the gap 111 is located on one side of the joint 120, and the gap 111 and the sink groove can reduce the connection length of the adjacent two groups of yoke portions 100, so that the prefabricated punching sheet 300 is more easily separated from the plate 400 at the accommodation groove 310, thereby reducing the deformation of the accommodation groove 310, and the manufacturing precision of the accommodation groove 310 can be improved.
[0045] Referring to Figure 6 As shown in the embodiment of the utility model, the intersection of the outer edge of the magnetic conduction section 110 and the extension line of the joint 120 is the end point 121, the end close to the joint 120 of the adjacent two magnetic conduction sections 110 is provided with the gap 111, the two gaps 111 located on both sides of the joint 120 are respectively the first gap 1111 and the second gap 1112, the maximum distance between the end away from the joint 120 of the first gap 1111 and the end point 121 is W1, the maximum distance between the end away from the joint 120 of the second gap 1112 and the end point 121 is W5, the minimum distance between the end close to the joint 120 of the first gap 1111 and the end point 121 is W2, and 0.1≤W2 / (W1+W5)≤0.5 is satisfied, for example, the value of W2 / (W1+W5) can be 0.1, 0.2, 0.3, 0.35, 0.4, 0.45, 0.5, etc. It should be noted that, in the two gaps 111 located on both sides of the joint 120, any one is the first gap 1111, and the other is the second gap 1112, and it is not specified that the gap 111 on the left side or the right side of the joint 120, Figure 6 The number in the embodiment of the utility model is only for example, and actually the first gap 1111 can be located on the right side and the second gap 1112 can be located on the left side.
[0046] It can be understood that when the value of W1+W5 is constant, and the value of W2 changes, the greater W2 is, the farther the distance between the gap 111 and the joint 120 is; the smaller W2 is, the closer the distance between the gap 111 and the joint 120 is. Therefore, when the value of W2 / (W1+W5) is less than 0.1, it indicates that the distance between the gap 111 and the joint 120 is close, which is easy to cause the structural strength of the yoke portion 100 at the accommodation slot 310 to be reduced, and the deformation bending and other adverse effects may occur during the stamping process. When the value of W2 / (W1+W5) is greater than 0.5, it indicates that the distance between the gap 111 and the joint 120 is far, which is difficult to make the yoke portion 100 at the accommodation slot 310 more easily separated from the plate 400, and the manufacturing precision of the accommodation slot 310 is reduced. Therefore, by reasonably designing the value of W2 / (W1+W5) in the range of 0.1 to 0.5, the structural strength of the yoke portion 100 at the accommodation slot 310 can be ensured, and the manufacturing precision of the accommodation slot 310 is improved.
[0047] With reference to the foregoing Figure 6 As shown in the embodiment of the utility model, one magnetic conduction segment 110 and one stator tooth 200 connected to the magnetic conduction segment 110 constitute one punching sheet unit, and the center line of the punching sheet unit passes through the center of the minimum circumscribed circle of the stator punching sheet 1000. In the direction parallel to the center line of the punching sheet unit, the maximum thickness of the magnetic conduction segment 110 is h0, and the maximum depth of the gap 111 is h1, which satisfies: 0.02≤h1 / h0≤0.2, for example, the value of h1 / h0 can be 0.02, 0.05, 0.08, 0.1, 0.15, 0.2, etc. Generally, the maximum thickness of the magnetic conduction segment 110 is determined, so when h0 remains unchanged, when the value of h1 / h0 is less than 0.02, that is, the maximum depth of the gap 111 is shallow, it is difficult to reduce the connection length of the adjacent two groups of yoke portions 100, so that the prefabricated punching sheet 300 is more likely to appear uneven stress during the separation process from the plate 400, and the manufacturing precision of the accommodation slot 310 is reduced. When the value of h1 / h0 is greater than 0.2, the maximum depth of the gap 111 is deep, which reduces the overall strength of the magnetic conduction segment 110. At the same time, since the magnetic conduction segment 110 also needs to play a role in conducting the magnetic circuit, too large depth of the gap 111 will also reduce the magnetic flux area and reduce the performance of the motor. Therefore, by reasonably designing the value of h1 / h0 in the range of 0.02 to 0.2, the manufacturing precision of the accommodation slot 310 can be improved, the structural strength of the magnetic conduction segment 110 can be ensured, and the influence on the magnetic flux area is avoided to be too large, which can ensure the performance of the motor.
[0048] With reference to the foregoing Figure 4As shown, in the embodiment of the utility model, the adjacent two magnetic conductive segments 110 are provided with through holes 130 at one end of the joint 120 towards the outside. One magnetic conductive segment 110 and one stator tooth 200 connected to the magnetic conductive segment 110 constitute a punching piece unit, and the center line of the punching piece unit passes through the center of the minimum circumscribed circle of the stator punching piece 1000. In the direction parallel to the center line of the punching piece unit, the maximum thickness of the magnetic conductive segment 110 is h0, and the shortest distance between the notch 111 and the through hole 130 is h2, satisfying: 0.03≤h2 / h0≤0.5, for example, the value of h2 / h0 can be 0.03, 0.1, 0.2, 0.3, 0.4, 0.5, etc. When the value of h2 / h0 is less than 0.03, the through hole 130 is too close to the outside of the magnetic conductive segment 110, which is easy to cause the yoke 100 to deform, break, and other adverse effects at the magnetic conductive segment 110. When the value of h2 / h0 is greater than 0.5, the through hole 130 is too far away from the outside of the magnetic conductive segment 110, and the depth of the accommodation groove 310 is too shallow, which is not conducive to the subsequent bending of the yoke 100. By reasonably designing the value of h2 / h0 in the range of 0.03 to 0.5, the overall strength of the yoke 100 can be guaranteed, and at the same time, the yoke 100 can be bent to form a plurality of magnetic conductive segments 110.
[0049] Referring to Figure 6 As shown, in the embodiment of the utility model, the outside of the magnetic conductive segment 110 is provided with a sink groove 112, and along the circumference of the stator punching piece 1000, the sink groove 112 is located in the middle part of the magnetic conductive segment 110. It should be noted that the middle part of the magnetic conductive segment 110 refers to: along the circumference of the stator punching piece 1000, the middle part of the magnetic conductive segment 110 is divided into three equal parts according to the maximum length of the magnetic conductive segment 110, and the middle part of the magnetic conductive segment 110 is the sink groove 112 connected to the middle part of the magnetic conductive segment 110. The cross-sectional shape of the sink groove 112 can be square, or as shown in FIG. 9, the cross-sectional shape of the sink groove 112 is triangular; or as shown in FIG. 10, the cross-sectional shape of the sink groove 112 is semicircular. Figure 10 As shown, the cross section of the sink groove 112 is arc-shaped. Of course, the shape of the sink groove 112 can also be semicircular, elliptical, etc., and the appropriate shape is selected according to the actual situation.
[0050] It can be understood that, since the magnetic circuit of the yoke 100 will run along the direction of the stator tooth 200, the setting of the sink groove 112 in the middle of the magnetic conducting segment 110 has less influence on the magnetic circuit. Meanwhile, in the process of producing the pre-punching sheet 300, since the yokes 100 of the pre-punching sheets 300 of the adjacent two groups are connected, by setting the sink groove 112 on the outside of the magnetic conducting segment 110, the connecting length of the yokes 100 of the pre-punching sheets 300 of the adjacent two groups can be reduced, which is beneficial to the separation of the pre-punching sheet 300 and the plate 400. Meanwhile, after the setting of the sink groove 112, it is beneficial to the better penetration of the lubricating oil to the plate 400 in the stamping process, which can solve the problem that the cutter is prone to friction and wear with the pre-punching sheet 300 in the blanking process, and can reduce the problem that the pre-punching sheet 300 has slender residual material at the corners after stamping, thereby reducing the case of secondary processing.
[0051] Referring to Figure 3 and Figure 4 , in the embodiment of the utility model, the sink groove 112 of one group of pre-punching sheets 300 and the two notches 111 of another group of pre-punching sheets 300 are matched in the production process of the adjacent two groups of punching sheet groups, that is, the sink groove 112 and the notches 111 on both sides of the joint 120 are aligned. It should be noted that, Figure 3 the structure of the notch 111 in the middle cannot be clearly seen, which can be understood with reference to Figure 4 . Referring to Figure 6 , along the circumference of the stator punching sheet 1000, the maximum width of the sink groove 112 is W3, the maximum distance between the end of the first notch 1111 away from the joint 120 and the end point 121 is W1, the maximum distance between the end of the second notch 1112 away from the joint 120 and the end point 121 is W5, and it satisfies: 0.9≤(W1+W5) / W3≤1.1, for example, the value of (W1+W5) can be 0.9, 0.95, 1, 1.05, 1.1, etc.
[0052] It can be understood that, when the value of (W1+W5) is greater than 1.1 or less than 0.9, the misalignment degree of the sink groove 112 and the two notches 111 will increase, which is not conducive to the penetration of the lubricating oil between the pre-punching sheet 300 and the plate 400, and may cause the pre-punching sheet 300 to have slender residual material at the corners after stamping, which requires secondary processing. By setting the value of (W1+W5) in the range of 0.9 to 1.1, the sink groove 112 and the notches 111 on both sides of the joint 120 are aligned as much as possible, thereby solving the problem that the cutter is prone to friction and wear with the pre-punching sheet 300 in the blanking process, and can reduce the problem that the pre-punching sheet 300 has slender residual material at the corners after stamping, thereby reducing the case of secondary processing, realizing one-time blanking, and improving the processing precision of the let-in groove 310.
[0053] Referring to Figure 6As shown, in the embodiment of the utility model, one magnetic conductive segment 110 and one stator tooth 200 connected to the magnetic conductive segment 110 constitute one punching piece unit, and the center line of the punching piece unit passes through the center of the minimum circumscribed circle of the stator punching piece 1000. In the direction parallel to the center line of the punching piece unit, the maximum thickness of the magnetic conductive segment 110 is h0, the maximum depth of the notch 111 is h1, and the maximum depth of the sink 112 is h3, and it satisfies: 0.08≤≤(h3-h1) / h0≤0.3, for example, the value range of (h3-h1) / h0 can be 0.08, 0.15, 0.18, 0.2, 0.3, etc. It can be understood that since the maximum thickness h0 of the magnetic conductive segment 110 is generally unchanged, the value of h3-h1 is usually changed. When the value of (h3-h1) / h0 is less than 0.08, in the case that the maximum depth h1 of the notch 111 is unchanged, the maximum depth of the sink 112 is relatively shallow, which is not conducive to the penetration of lubricating oil between the gap between the prefabricated punching piece 300 and the plate material 400. When the value of (h3-h1) / h0 is greater than 0.5, in the case that the maximum depth h1 of the notch 111 is unchanged, the depth of the sink 112 is relatively large, which will affect the magnetic flux area of the magnetic circuit, the magnetic circuit is easy to saturate, which will cause the performance of the motor to decrease, and at the same time, it will cause the overall strength of the yoke part 100 to decrease, and the reliability of the motor to decrease. Therefore, by reasonably designing the value of h3 / h0 in the range of 0.1 to 0.5, it can facilitate the penetration of lubricating oil between the gap between the prefabricated punching piece 300 and the plate material 400, while also reducing the influence on the magnetic flux area of the magnetic circuit, and ensuring that the performance of the motor meets the use requirements.
[0054] It can be understood that although the prefabricated punching piece 300 is generally in a staggered plug-in row pattern, the tooth parts 210 of the two rows of prefabricated punching pieces 300 are staggered and plugged to form a group of punching piece groups, which can improve the utilization rate of the plate material 400. However, there is still a part of the plate material 400 that is not used, and the material cost is too high. In order to further improve the utilization rate of the plate material 400, with reference to Figure 6 As shown, in the embodiment of the utility model, the stator tooth 200 includes a tooth part 210 and a tooth shoe part 220, one end of the tooth part 210 is connected to the inner side of the magnetic conductive segment 110, and the tooth shoe part 220 is connected to the end of the tooth part 210 away from the magnetic conductive segment 110. One side of the tooth part 210 is provided with a groove 211, and the groove 211 can be located on only one side of the tooth part 210, so as to reduce the influence on the magnetic flux area of the tooth part 210. With reference to Figure 1 and Figure 3 As shown, since one side of the tooth part 210 is provided with the groove 211, one of the two prefabricated punching pieces 300 in the staggered plug-in row can move in the direction of the groove 211, so the groove 211 plays a role in avoiding the tooth shoe part 220, so that the arrangement between the two rows of prefabricated punching pieces 300 is more compact, thereby reducing material waste and improving the utilization rate of the plate material 400.
[0055] With reference toFigure 6 As shown in the embodiment of the utility model, along the circumference of the stator punching sheet 1000, the maximum depth of the groove 211 is h4, and the maximum width of the tooth portion 210 is W4, satisfying: 0.1≤h4 / W4≤0.25, for example, the value of h4 / W4 can be 0.1, 0.12, 0.15, 0.18, 0.2, 0.23, 0.25, etc. The maximum width of the tooth portion 210 is usually kept unchanged, and the maximum depth h4 of the groove 211 is adjusted. When the value of h4 / W4 is less than 0.1, and the maximum depth of the groove 211 is relatively shallow, the compact arrangement of the prefabricated punching sheet 300 is not greatly affected, and the material utilization rate cannot be improved. When the value of h4 / W4 is greater than 0.25, the depth of the groove 211 is relatively large, which can cause the strength of the stator tooth 200 to decrease, and can cause the magnetic flux area to decrease and the motor performance to decrease. Therefore, by reasonably designing the value of h4 / W4 in the range of 0.1 to 0.25, the arrangement between the two rows of prefabricated punching sheets 300 is more compact, thereby reducing the waste of materials and improving the utilization rate of the plate 400. At the same time, the stator tooth 200 can also have appropriate strength, the influence on the magnetic flux area is reduced, and the motor performance can meet the use requirements.
[0056] Referring to Figure 1 As shown in the embodiment of the utility model, a plurality of guide holes 410 are arranged on the plate 400, and the guide holes 410 are used for positioning cooperation with the positioning column and other positioning structures on the punching machine tool, so as to ensure that the prefabricated punching sheet 300 can be accurately punched from the plate 400. Due to the groove 211 arranged on the side wall of the tooth portion 210, the arrangement of the prefabricated punching sheet 300 on the plate 400 is more compact. At the same time, the distance between the two adjacent tooth portions 210 is closer, but the distance between the adjacent other tooth portion 210 is increased, so that there is enough space between the two tooth portions 210 with increased distance to arrange the guide hole 410, and the punching precision of the prefabricated punching sheet 300 can be further improved.
[0057] Referring to Figure 5 As shown in the embodiment of the utility model, the side of the tooth shoe portion 220 away from the tooth portion 210 is a concave arc surface. When the plurality of tooth shoe portions 220 are formed in a ring structure, the arc surface of the tooth shoe portion 220 can form a circular arc structure. When the stator punching sheet 1000 is applied to the motor, the circular arc structure formed by the arc surfaces of the plurality of tooth shoe portions 220 can form an air gap with the rotor, so as to ensure that the width change of the air gap is relatively uniform, and is conducive to the rotation of the rotor.
[0058] The stator core of the embodiment of the utility model, including multiple stator punching sheet 1000 of above embodiment, multiple stator punching sheet 1000 constitute stator core after stacking along the axial direction, the stator core of the embodiment of the utility model adopts the stator punching sheet 1000 of above embodiment, by setting yoke portion 100 including multiple circumferential connection of magnetic conductive segment 110, and multiple stator teeth 200 and the inside of magnetic conductive segment 110 are connected one by one, the outside of magnetic conductive segment 110 has gap 111, and gap 111 is located at the circumferential side of seam 120. Because prefabricated punching sheet 300 in the production process is generally for the plug-in row sample, the tooth portion 210 of two rows of prefabricated punching sheet 300 is staggered and plugged to form a group of punching sheet group, and the yoke portion 100 of the prefabricated punching sheet 300 of the adjacent two groups is connected. The outside of magnetic conductive segment 110 is provided with gap 111, and gap 111 is located at the side of seam 120, which can reduce the connection length of the adjacent two groups of yoke portion 100, so that the prefabricated punching sheet 300 is more easily separated from the plate 400 at the accommodation slot 310, thereby reducing the deformation of the accommodation slot 310, and the manufacturing precision of the accommodation slot 310 can be improved.
[0059] Since the stator core adopts all the technical solutions of the stator punching sheet 1000 of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.
[0060] The motor of the embodiment of the utility model includes the stator core of the above embodiment. The motor of the embodiment of the utility model adopts the stator core of the above embodiment, and the stator punching sheet 1000 of the stator core is provided with a yoke portion 100 including multiple circumferential connection of magnetic conductive segment 110, and multiple stator teeth 200 and the inside of magnetic conductive segment 110 are connected one by one, the outside of magnetic conductive segment 110 has gap 111, and gap 111 is located at the circumferential side of seam 120. Because prefabricated punching sheet 300 in the production process is generally for the plug-in row sample, the tooth portion 210 of two rows of prefabricated punching sheet 300 is staggered and plugged to form a group of punching sheet group, and the yoke portion 100 of the prefabricated punching sheet 300 of the adjacent two groups is connected. The outside of magnetic conductive segment 110 is provided with gap 111, and gap 111 is located at the side of seam 120, which can reduce the connection length of the adjacent two groups of yoke portion 100, so that the prefabricated punching sheet 300 is more easily separated from the plate 400 at the accommodation slot 310, thereby reducing the deformation of the accommodation slot 310, and the manufacturing precision of the accommodation slot 310 can be improved.
[0061] Since the motor adopts all the technical solutions of the stator core of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.
[0062] The utility model embodiment makes the detailed explanation in combination with the drawing, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range that the person skilled in the art has possesses without departing from the utility model's tenet under the precondition that the utility model is not limited to the above -mentioned embodiment.
Claims
1. A stator lamination characterized by, The application relates to a stator lamination for a motor, comprising: a yoke part comprising a plurality of magnetic conductive segments connected in sequence along the circumference of the stator lamination, the outer side of the magnetic conductive segments being provided with a groove and a notch; a plurality of stator teeth, the number of the stator teeth being the same as that of the magnetic conductive segments, and the plurality of stator teeth being connected to the inner side of the plurality of magnetic conductive segments one by one; wherein a joint is formed between two adjacent magnetic conductive segments, and the notch is located at one end of the magnetic conductive segment close to the joint.
2. The stator lamination of claim 1, wherein: The intersection of the outer edge of the magnetic conductive segment and the extension line of the joint is an end point, the two ends of the adjacent magnetic conductive segments close to the joint are each provided with the notch, the two notches located on the two sides of the joint are a first notch and a second notch respectively, the maximum distance between one end of the first notch away from the joint and the end point is W1, the maximum distance between one end of the second notch away from the joint and the end point is W5, the minimum distance between one end of the first notch close to the joint and the end point is W2, and the following condition is met: 0.1<=W2 / (W1+W5) <=0.
5.
3. The stator lamination of claim 1, wherein: The maximum thickness of the magnetic conductive segment is h0, and the maximum depth of the notch is h1, and the following condition is met: 0.02<=h1 / h0 <=0.
2.
4. The stator lamination of claim 1, wherein: Along the circumference of the stator lamination, the groove is located in the middle of the magnetic conductive segment.
5. The stator lamination of claim 1, wherein: Along the circumference of the stator lamination, the maximum width of the groove is W3, the intersection of the outer edge of the magnetic conductive segment and the extension line of the joint is an end point, the two ends of the adjacent magnetic conductive segments close to the joint are each provided with the notch, the two notches located on the two sides of the joint are a first notch and a second notch respectively, the maximum distance between one end of the first notch away from the joint and the end point is W1, the maximum distance between one end of the second notch away from the joint and the end point is W5, and the following condition is met: 0.9<= (W1+W5) / W3 <=1.
1.
6. The stator lamination of claim 1, wherein: The maximum thickness of the magnetic conductive segment is h0, the maximum depth of the notch is h1, and the maximum depth of the groove is h3, and the following condition is met: 0.08<= (h3-h1) / h0 <=0.
3.
7. The stator lamination of claim 1, wherein: The stator tooth comprises a tooth part and a tooth shoe part, one end of the tooth part is connected to the inner side of the magnetic conductive segment, the tooth shoe part is connected to the end of the tooth part away from the magnetic conductive segment, and one side of the tooth part is provided with a groove.
8. A stator lamination according to claim 7, characterised in that: Along the circumference of the stator lamination, the maximum depth of the groove is h4, and the maximum width of the tooth part is W4, and the following condition is met: 0.1<=h4 / W4 <=0.
25.
9. A stator core characterized by: The application relates to a stator lamination for a motor, comprising:
10. An electric machine characterized by The application relates to a stator lamination for a motor, comprising: