CN111293800A

CN111293800A - Punching sheet, winding type iron core and motor

Info

Publication number: CN111293800A
Application number: CN202010156390.7A
Authority: CN
Inventors: 杜荣法; 叶乾杰; 李贻伟; 赵新超; 孙祥善
Original assignee: Wolong Electric Jinan Motor Co ltd; Wolong Electric Group Co Ltd
Current assignee: Wolong Electric Jinan Motor Co ltd; Wolong Electric Drive Group Co Ltd
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-06-16

Abstract

The invention discloses a punching sheet, a winding type iron core and a motor, and relates to the technical field of motors, wherein the punching sheet comprises a yoke part, tooth parts and bending grooves, the tooth parts are distributed on one side of the yoke part at intervals, a wire groove is formed between every two adjacent tooth parts, more than one bending groove is formed at the joint of the yoke part and the wire groove, each bending groove is of an included angle structure with an opening facing one side of the wire groove, and the diagonal center line of each included angle is superposed with the bisector of the wire groove; a winding type iron core is formed by spirally winding the punching sheet into a circular structure, and more than one circular structure is formed by laminating and combining; a motor comprises the winding type iron core, the bending groove is formed in the yoke portion of a punching sheet, the winding deformation width of the yoke portion is reduced, the winding stress of the punching sheet is reduced, the bending groove formed in a winding mode is changed from an opening to a closed opening, the width of the yoke portion is filled, the problem that the magnetic density of the local yoke portion is too high in motor design is solved, and the performance of the motor is improved.

Description

Punching sheet, winding type iron core and motor

Technical Field

The invention relates to the technical field of motors, in particular to a punching sheet, a winding type iron core and a motor.

Background

In the prior art, whether square punching sheets or round punching sheets are adopted, more waste leftover materials exist during blanking, the utilization rate of silicon steel materials is low, waste is caused, and the cost of the iron core is higher. Adopt traditional bar towards piece, can reduce blanking abandonment leftover bits through the opposite insertion stock layout, and then reach the purpose that improves silicon steel material utilization ratio, reduce cost. However, the width of the yoke part of the punching sheet of the large and short plate in the structure limits the winding forming process, the wider the yoke part is, the larger the expansion and contraction rate of the material is during winding, the more difficult the winding is, and even the winding forming cannot be carried out; the narrower the width of the yoke part is, the convenience is brought to winding and forming, but the performance of the motor is limited due to the overhigh magnetic density of the yoke part in the design of the motor. With the development of the technology, some cases aiming at the improvement of the width of the yoke part also appear at present, the stator core is divided into a groove-shaped part body and the yoke part body, then the groove-shaped part body and the yoke part body are respectively wound and formed, and the hot sleeve is integrated, so that the width of the yoke part can be increased, but in terms of the technology, the processing technology is more complicated than the traditional direct winding and forming of the strip-shaped punching sheet, the hot sleeve technology has higher requirement on the matching precision of parts, and the implementation difficulty is increased.

Disclosure of Invention

1. Technical problem to be solved by the invention

Aiming at the technical problem that the punching sheet is difficult to wind in the prior art, the invention provides the punching sheet, the wound iron core and the motor, which are convenient for the winding of the punching sheet and improve the performance of the motor.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the utility model provides a towards piece, includes yoke portion and tooth portion, still includes the groove of bending, a plurality of tooth portion interval distribution form the wire casing between the adjacent tooth portion in one side of yoke portion, set up more than one groove of bending with wire casing handing-over department on the yoke portion, the groove of bending is the opening towards the contained angle structure of wire casing one side, the diagonal line of contained angle and the bisector coincidence of wire casing.

Optionally, the punched piece is spirally wound into a full circle structure, the full circle structure forms Z wire slots, and the value of Z is an integral multiple of 2 or 3.

Optionally, the yoke width W is: w is more than or equal to 3 and less than or equal to 15 mm.

Optionally, the minimum distance H from the included angle vertex of the bending groove to the side of the yoke part away from the wire casing is as follows: h is more than or equal to 1 and less than or equal to 10 mm.

Optionally, the wire casing is equidistant between the wire casing and arranges, the quantity of bending the groove between the adjacent wire casing is N, the diagonal center line of contained angle and the N +1 bisector coincidence of wire casing, the number of degrees of contained angle is α, the number of degrees α of contained angle is 360 °/ZN.

Optionally, a notch is arranged at the vertex of the included angle of the bending groove.

Optionally, two edges of the bending groove included angle structure are respectively provided with a convex portion and a concave portion corresponding to each other.

Optionally, tooth portion includes tooth wide portion and pole shoe portion, tooth wide portion one end is connected with yoke portion, the tooth wide portion other end is connected with pole shoe portion, pole shoe portion is equipped with circular arc face and horizontal face on keeping away from the terminal surface of tooth wide portion one end, circular arc face bilateral symmetry is equipped with horizontal face.

A winding type iron core comprises any one of the punching sheets, the punching sheets are spirally wound into a circular structure, and more than one circular structure is laminated and combined to form the winding type iron core.

An electric machine comprising said wound core.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) according to the punching sheet, the wound iron core and the motor, the bending groove is formed in the yoke part of the punching sheet, the winding deformation width of the yoke part is reduced, the winding stress of the punching sheet is reduced, the bending groove formed by winding is changed from an opening into a closed opening, the width of the yoke part is filled, the problem that the magnetic density of the local yoke part is too high in the motor design is solved, and the motor performance is improved.

(2) According to the punching sheet, the wound iron core and the motor, the utilization rate of silicon steel materials is improved through opposite-inserting and sample arrangement of the punching sheet, so that the purposes of reducing cost and improving the performance of the motor are achieved.

(3) According to the punching sheet, the wound iron core and the motor, the bending groove is formed in the yoke part of the punching sheet, so that the use of silicon steel materials is saved, the overall weight of the wound iron core and the motor after winding forming is reduced, and the production cost is saved.

Drawings

FIG. 1 is a schematic structural diagram of a sheet according to an embodiment of the present invention;

FIG. 2 is a schematic view of a bending groove structure according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an opposite insertion arrangement according to an embodiment of the present invention;

FIG. 4 is a schematic view of a punching sheet winding structure in the embodiment of the invention 1;

FIG. 5 is a schematic view of a punching sheet winding structure in the embodiment of the invention 2;

FIG. 6 is a schematic view of a spiral winding of an embodiment of the present invention;

fig. 7 is a schematic diagram of a wound core structure according to an embodiment of the present invention.

The reference numerals of the drawing indicate 1, yoke part, 2, tooth part, 21, tooth width part, 22, pole shoe part, 23, arc surface, 24, transverse surface, 3, bending groove, 31, notch, 32, convex part, 33, concave part, 4, wire groove, W, yoke part width, H, minimum distance from included angle vertex of the bending groove to the side of the yoke part far away from the wire groove, and α, included angle degree of the bending groove.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

Example 1

The utility model provides a punching sheet, includes yoke portion 1 and tooth portion 2, still includes

bending groove

3, 2 interval distributions in one side of yoke portion 1 of a plurality of tooth portions form wire casing 4 between the adjacent tooth portion 2, yoke portion 1 is gone up and is offered more than one bending groove 3 with wire casing 4 handing-over department, bending groove 3 is the contained angle structure of opening towards wire casing 4 one side, the diagonal line of contained angle and the bisector coincidence of wire casing 4.

The bending groove 3 is formed in the yoke portion 1 of the punching sheet, so that the winding deformation width of the yoke portion 1 is reduced, and the winding stress of the punching sheet is reduced. And the bending groove 3 after winding forming is changed from an opening to a closed opening, the width of the yoke part 1 is filled, the problem that the magnetic density of the local yoke part 1 is too high in the design of the motor is solved, and the performance of the motor is improved.

Example 2

As shown in fig. 1, on the basis of the technical solution of embodiment 1, the punched piece of this embodiment may be improved in that the punched piece is spirally wound into a full-circle structure, the full-circle structure forms Z wire slots 4, and the value of Z is an integer multiple of 2 or 3.

The value of Z is integral multiple of 2 or 3, can be divided by 360 degrees of circumferential angle, is favorable for the value of the included angle of the wire slot 4, and improves the production efficiency and the motor performance. 12, 24 and 27 can be taken, and when the value of Z is 2, the rotating speed of the motor is the highest; when the value of Z is 24, the rotating speed of the motor is relatively stable, and the stability of the motor is better.

Example 3

As shown in fig. 1, a punching sheet according to this embodiment may be modified as follows based on any one of embodiments 1 and 2, where a width W of the yoke 1 is: w is more than or equal to 3 and less than or equal to 15 mm. W may be 3mm, 5mm, 7mm, 9mm, 11mm, 13mm, 15 mm.

The larger the width W of the yoke part 1 is, the larger the expansion and contraction rate of the material is during winding is, the more difficult the winding is, and even the winding forming can not be carried out; the smaller the width W of the yoke part 1 is, the convenience is brought to winding and forming, but the performance of the motor is limited due to the overhigh magnetic density of the yoke part 1 in the design of the motor, and the reasonable width W of the yoke part 1 is beneficial to the implementation of a winding process.

Example 4

As shown in fig. 1, on the basis of any of the technical solutions of

embodiments

1, 2, and 3, the punching sheet of this embodiment may be improved as follows, where a minimum distance H from a vertex of an included angle of the bending groove 3 to a side of the yoke portion 1 away from the wire casing 4 is: h is more than or equal to 1 and less than or equal to 10 mm. H can be 1mm, 2mm, 4mm, 6mm, 8mm or 10 mm.

The minimum distance H from the included angle vertex of the bending groove 3 to the side, far away from the wire groove 4, of the yoke part 1 is as follows: h is not less than 1mm and not more than 10mm, so that the strength of the stamped steel in the winding forming process is ensured, and the influence of overlarge width on the winding forming and the motor performance is avoided.

Example 5

As shown in fig. 1, on the basis of any one of the technical solutions of

embodiments

1, 2, 3, and 4, the punching sheet of this embodiment may be improved in that the wire slots 4 are arranged at equal intervals from the wire slots 4.

Equidistant arranging between wire casing 4 and the wire casing 4, arranging towards inserting of punching the piece when being convenient for to punch, reducing abandonment leftover bits, improve material utilization.

Example 6

As shown in fig. 1, a punching sheet of this embodiment may be modified from any one of embodiments 1 to 5 in that the number of bending grooves 3 between adjacent wire grooves 4 is N, a diagonal center line of an included angle of the wire grooves 4 coincides with an N +1 bisector of the wire groove 4, the degree of the included angle is α, the degree of the included angle α is 360 °/ZN., when Z is 12, N is 1, the degree of the included angle α is 30 °, when Z is 24, N is 3, the degree of the included angle α is 5 °, when Z is 30, N is 4, and the degree of the included angle α is 3 °, which is favorable for uniform distribution of winding stress, improvement of winding accuracy, guarantee of product size, and reduction of motor noise.

Example 7

As shown in fig. 1, on the basis of any one of the technical solutions of embodiments 1 to 6, the punching sheet of this embodiment may be modified as follows, and a notch 31 is disposed at a vertex of an included angle of the bending groove 3. The design of the notch 31 ensures the feasibility of the blanking and winding process. The notch 31 may be circular, oval, triangular, rectangular or square.

Example 8

As shown in fig. 2, on the basis of any one of the technical solutions of embodiments 1 to 7, the punching sheet of this embodiment may be modified in that two edges of the angle structure of the bending groove 3 are respectively provided with a convex portion 32 and a concave portion 33 which correspond to each other.

The convex portion 32 and the concave portion 33 are spirally wound to form a closed portion in which the convex portion 32 and the concave portion 33 are fitted. The structural design of the convex part 32 and the concave part 33 is beneficial to improving the winding precision and ensuring the product size, and the formed closed part has the advantage of increasing the length of the splicing seam and improves the performance of the motor. When the convex portions 32 and the concave portions 33 are in pairs, the folding grooves 3 are more accurately occluded, and the use of silicon steel materials is reduced.

Example 9

As shown in fig. 1, on the basis of any technical solution of embodiments 1 to 8, the punching sheet of this embodiment may be modified in that a tooth portion 2 includes a tooth wide portion 21 and a pole shoe portion 22, one end of the tooth wide portion 21 is connected to the yoke portion 1, the other end of the tooth wide portion 21 is connected to the pole shoe portion 22, an end surface of the pole shoe portion 22, which is far away from one end of the tooth wide portion 21, is provided with an arc surface 23 and a transverse surface 24, and two sides of the arc surface 23 are symmetrically provided with the transverse surfaces 24.

The pole shoe portion 22 is equipped with arc surface 23 and horizontal face 24 on keeping away from the terminal surface of tooth wide portion 21 one end, the symmetry in arc surface 23 both sides is equipped with horizontal face 24, horizontal face 24 is about 2 central lines bilateral symmetry in tooth portion, just horizontal face 24 is mutually perpendicular with 2 central lines in tooth portion, is favorable to the punching sheet to inserting to be arranged, shortens the material width, improves silicon steel material utilization ratio.

Example 10

A wound core, which is formed by spirally winding the punching sheet described in any one of embodiments 1 to 9 into a circular structure, and laminating and combining more than one circular structure.

The wound iron core formed by spirally winding the stamped steel can balance poor iron core parallelism caused by the material of the strip-shaped stamped steel, namely the silicon steel sheet and plate difference and out-of-tolerance, through a spiral structure, and the product quality is improved.

Example 11

An electric machine comprising the wound core of embodiment 10.

By adopting the winding type iron core to construct the motor, the silicon steel material cost of the motor and the total weight of the motor can be reduced, and the production efficiency and the motor performance are improved.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. The utility model provides a punching sheet, includes yoke portion and tooth portion, its characterized in that still includes the groove of bending, a plurality of tooth portion interval distribution form the wire casing between the adjacent tooth portion in one side of yoke portion, set up more than one groove of bending with wire casing handing-over department on the yoke portion, the groove of bending is the contained angle structure of opening towards wire casing one side, the diagonal line of contained angle and the bisector coincidence of wire casing.

2. The punching sheet according to claim 1, wherein the punching sheet is spirally wound into a full circle structure, the full circle structure forms Z wire grooves, and the value of Z is an integral multiple of 2 or 3.

3. The punch sheet of claim 1, wherein the yoke width W is: w is more than or equal to 3 and less than or equal to 15 mm.

4. The punching sheet according to claim 1, wherein the minimum distance H from the included angle vertex of the bending groove to the side of the yoke part away from the wire groove is as follows: h is more than or equal to 1 and less than or equal to 10 mm.

5. The punching sheet according to claim 1, wherein the wire grooves are arranged at equal intervals, the number of bending grooves between adjacent wire grooves is N, the diagonal center line of the included angle coincides with the N +1 bisector of the wire groove, the degree of the included angle is α, and the degree of the included angle is α ═ 360 °/ZN.

6. The punching sheet according to claim 4, wherein a notch is formed at the vertex of the included angle of the bending groove.

7. The punching sheet according to claim 4, wherein two edges of the bending groove included angle structure are respectively provided with a convex portion and a concave portion which correspond to each other.

8. The punching sheet according to any one of claims 1 to 7, wherein the tooth portion comprises a tooth wide portion and a pole shoe portion, one end of the tooth wide portion is connected with the yoke portion, the other end of the tooth wide portion is connected with the pole shoe portion, an end face of the pole shoe portion, which is far away from one end of the tooth wide portion, is provided with an arc surface and a transverse surface, and the transverse surface is symmetrically arranged on two sides of the arc surface.

9. A coiled iron core, characterized in that, the punching sheet of any one of claims 1 to 8 is spirally coiled into a circular structure, and more than one circular structures are laminated and combined to form the coiled iron core.

10. An electric machine comprising the wound core of claim 9.