CN217824460U

CN217824460U - Rotor-stator combined punching sheet for motor

Info

Publication number: CN217824460U
Application number: CN202221917467.9U
Authority: CN
Inventors: 廖辉和
Original assignee: Foshan Hechuan Motor Technology Co ltd
Current assignee: Foshan Hechuan Motor Technology Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-11-15
Anticipated expiration: 2032-07-25

Abstract

The utility model belongs to the technical field of the motor accessory technique and specifically relates to a motor is with changeing stator combination punching sheet is related to, including stator punching sheet and rotor punching sheet, stator punching sheet center department sets up the stator centre bore that is used for installing the rotor punching sheet, and stator punching sheet and rotor punching sheet linkage are connected, 36 stator teeth have been distributed to the stator punching sheet inboard all around in the form of ring shape, and the vertical cross-section of stator tooth is the T font, has seted up stator winding groove between two adjacent stator teeth, the cell type in stator winding groove is the round bottom groove, the outside circumference interval distribution of stator punching sheet has 4 cramp grooves, and the cramp groove is the trapezoidal structure of inside width narrow outside; the utility model discloses a rotor-stator combination is towards piece effectively improves motor efficiency and reduces the motor volume, has improved the work efficiency of motor simultaneously, has practiced thrift material cost, still is favorable to the heat dissipation of motor.

Description

Rotor-stator combined punching sheet for motor

Technical Field

The utility model belongs to the technical field of motor accessory technique and specifically relates to a rotor and stator combination towards piece for motor is related to.

Background

The permanent magnet motor has the advantages of small volume, light weight, high efficiency, energy conservation and the like, and is widely applied to the aspects of industrial production, civil use and the like. With the emergence of new permanent magnetic materials, modern rare earth permanent magnet machines have a trend towards high power and high speed development, and are also more and more widely applied to transmission systems. In the design of a high-power permanent magnet motor, a stator winding of the motor is usually a formed winding, a stator punching sheet adopts a rectangular open slot, the width of the slot opening is large, a strong tooth space effect can be generated, and large tooth harmonic potential, tooth space torque and torque pulsation are accompanied in the operation of the motor.

The existing stator punching sheet is relatively complex to manufacture, is overall heavy, is not high in accuracy during installation, is inaccurate in positioning, relatively poor in working stability of the motor, relatively high in noise, and easy to damage, the service life of the motor is shortened, and heat is serious, and the outer diameter and the inner diameter of the rotor punching sheet are relatively large, so that the proportion of the rotor to the whole motor is increased, especially, the rotor punching sheet is arranged on a solid rotor shaft of a low-voltage motor, the proportion of the rotor is relatively large, the overall weight of the motor cannot be reduced, the working efficiency of the motor is influenced, and materials for manufacturing the rotor punching sheet are wasted.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical defect who proposes among the above-mentioned background art, the utility model aims at providing a motor is with changeing stator combination towards piece effectively improves motor efficiency and reduces the motor volume, has improved the work efficiency of motor simultaneously, has practiced thrift material cost, still is favorable to the heat dissipation of motor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a motor is with changeing stator combination towards piece, includes stator punching and rotor punching, stator punching center department sets up the stator centre bore that is used for installing the rotor punching, and the stator punching is connected with the rotor punching linkage, it has 36 stator teeth to be ring shape distribution around the stator punching inboard, and the vertical cross-section of stator tooth is the T font, has seted up stator winding groove between two adjacent stator teeth, the cell type of stator winding groove is round bottom pear-shaped groove, the outside circumference interval distribution of stator punching has 4 cramp grooves, and the cramp groove is the inner width outer narrow trapezium structure.

Preferably, the stator is provided with a stator positioning groove along 15 degrees of the circumferential span of the central axis of the top tab groove, and the radius of the stator positioning groove is 1-2 mm.

Preferably, the outer contour of the rotor sheet is of an arc expansion structure, 8 pairs of magnetic steel grooves are circumferentially distributed on the rotor sheet, one end of each pair of magnetic steel grooves are close to each other to form V-shaped symmetry, the magnetic steel grooves are symmetrically arranged along a central line, lightening holes are formed in the positions, symmetrical to the axial central line, between each pair of magnetic steel grooves and between every two pairs of adjacent magnetic steel grooves, and the diameters of the lightening holes are 4-6 mm.

Preferably, a rotor center hole for installing a rotor shaft is formed in the center of the rotor sheet, a rectangular boss is arranged at one end of the rotor center hole, a rotor positioning groove is formed in the rotor center hole at an angle of 45 degrees along the circumferential span of the rotor axis, and the radius of the rotor positioning groove is 1-2 mm.

By adopting the technical scheme.

Preferably, the magnetic steel groove comprises a groove bottom and two groove edges which are mutually communicated, the joint of the groove bottom and the two groove edge grooves is provided with an arc transition, the distance between the groove bottom and the circle center of the rotor punching sheet is 25 mm-30 mm, and the width of the groove edge is 4.3 mm-6 mm.

Preferably, the included angle between each pair of magnetic steel slot edges is 79-85 degrees, a magnetic bridge is formed between the outer end of each slot edge and the outer arc of the rotor sheet, and the thickness of the magnetic bridge is 1-1.5 mm.

To sum up, the beneficial effects of the utility model are that:

1. the utility model respectively superposes a plurality of stator punching sheets and rotor punching sheets to form a motor stator and a motor rotor; through quantity and the size of punching stator slot in the lamellar body to the stator and injecing to and the rotor is limited to quantity and structure, the size of magnetic steel groove in punching the lamellar body, can make motor stator and electric motor rotor have more excellent conversion efficiency when mutually supporting the use, thereby improve the utility model discloses the motor efficiency of making reduces its motor volume.

2. The stator teeth in the stator punching sheet of the utility model adopt the T-shaped structure, thereby increasing the width of the stator teeth, reducing the magnetic density of the stator teeth, leading the magnetic field distribution to be more uniform, reducing the electric energy loss and improving the efficiency of the motor; the structure of the magnetic steel groove on the rotor punching sheet can ensure the balance of a magnetic circuit, effectively prevent the oversaturation of the magnetic flux density, and prolong the service life of the motor due to the low temperature rise of the motor.

Drawings

Fig. 1 is a schematic structural diagram of a rotor-stator combined punching sheet of the present invention;

fig. 2 is a schematic structural view of the stator punching sheet of the present invention;

fig. 3 is a schematic structural view of a rotor sheet of the present invention;

fig. 4 is a front view of the stator lamination of the present invention;

fig. 5 is a front view of a rotor sheet according to the present invention;

FIG. 6 is an enlarged view of the structure at the position I of the stator punching sheet of the present invention;

FIG. 7 is an enlarged view of the structure at position II of the stator punching sheet of the present invention;

fig. 8 is an enlarged view of the structure at iii of the rotor sheet of the present invention.

The reference numerals in the figures illustrate:

1. stator punching sheets; 11. a stator center hole; 12. stator teeth; 13. a stator winding slot; 131. a first tank body; 132. a second tank body; 133. a third tank body; 134. a fourth tank body; 14. a buckle sheet groove; 15. A stator positioning groove; 2. rotor punching sheets; 21. a magnetic steel groove; 211. the bottom of the tank; 212. a groove edge; 22. lightening holes; 23. a rotor center hole; 231. a boss; 232. a rotor positioning groove; 24. a magnetic bridge.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the terms are used in the description to indicate that the referenced device or element must have the specified orientation, be constructed and operated in the specified orientation, and not for the purposes of limitation.

As shown in fig. 1 to 7, a rotor-stator combined punching sheet for a motor comprises a stator punching sheet 1 and a rotor punching sheet 2, a stator central hole 11 for installing the rotor punching sheet 2 is formed in the center of the stator punching sheet 1, the stator punching sheet 1 is in linkage connection with the rotor punching sheet 2, 36 stator teeth 12 are distributed around the inner side of the stator punching sheet 1 in a circular ring shape, the vertical section of each stator tooth 12 is in a T shape, each stator tooth 12 is composed of a vertical beam and a cross beam, the upper end of each vertical beam is wide, the lower end of each vertical beam is narrow, and two ends of each cross beam are provided with a closing section.

Specifically, stator punching 1 can adopt integrated into one piece or adopt a plurality of stator punching 1 units to mutually support, the matched stack, the concatenation forms, stator punching 1 is inside to inject the rotor and rotates the space for with 2 structure cooperations of rotor punching.

In this embodiment, a stator winding slot 13 is formed between two adjacent stator teeth 12, the slot shape of the stator winding slot 13 is a round-bottom pear-shaped slot, and the stator winding slot 13 includes a first slot body 131, a second slot body 132, a third slot body 133 and a fourth slot body 134; the first slot 131 is formed corresponding to a cross beam side wall portion of the stator tooth 12, the second slot 132 is flared and inclined along a vertical beam direction of the stator tooth 12, the third slot 133 is flared, the fourth slot 134 is arc-shaped, and the third slot 133 is inclined towards the fourth slot 134; the width of the first slot body 131 is 2mm, the included angle between the second slot body 132 and the first slot body 131 is 21.8 degrees, the width of the second slot body 132 is 4mm, the two ends of the third slot body 133 are connected with the second slot body 132 and the fourth slot body 134, the length of the third slot body is 15.5mm, and the radius of the fourth slot body 134 is 3.2mm.

4 buckle piece grooves 14 are distributed on the outer side circumference of the stator punching sheet 1 at intervals, and the buckle piece grooves 14 are of a trapezoidal structure with a wide inner part and a narrow outer part. The inside width in cramp groove 14 is 10mm, and its bottom is provided with the circular arc transition district with the both sides junction, and both sides wall lean out and form the binding off, stator positioning groove 15 has been seted up along the central axis circumferential span 15 department of top cramp groove 14 to stator towards piece 1, and stator positioning groove 15's radius is 1 ~ 2mm, stator positioning groove 15 is used for the location when stator towards piece 1 arranges in order.

Referring to fig. 5, in the present embodiment, the outer profile of the rotor sheet 2 is an arc-shaped expanded structure, 8 pairs of magnetic steel slots 21 are circumferentially distributed on the rotor sheet 2, one end of each pair of magnetic steel slots 21 is close to each other to form V-shaped symmetry, the magnetic steel slots 21 are symmetrically arranged along a central line, weight-reducing holes 22 are formed between each pair of magnetic steel slots 21 and between each two pairs of adjacent magnetic steel slots 21, and the diameter of each weight-reducing hole 22 is 4-6 mm.

The magnetic steel slots 21 are used for mounting magnetic steel on the stator punching sheet 1, and the lightening holes 22 can reduce the specific gravity of the rotor punching sheet 2 in the whole motor, so that the rotor is lightened, the working efficiency of the motor is improved, the material cost is saved, and the heat dissipation effect of the stator can be improved; the lightening holes 22 may be round, peach-shaped, heart-shaped, etc.

A rotor center hole 23 for mounting a rotor shaft is formed in the center of the rotor sheet 2, a rectangular boss 231 is arranged at one end of the rotor center hole 23, a rotor positioning groove 232 is formed in the position, 45 degrees along the circumferential span of the rotor axis, of the rotor center hole 23, and the radius of the rotor positioning groove 232 is 1-2 mm;

specifically, rotor centre bore 23 is used for cooperating with the rotor shaft, and the rectangle boss 231 of its top one end is used for with rotor shaft's key slot looks joint, makes its contact inseparable, drives rotor sheet 2 by the rotor shaft and rotates, and the diameter of boss 231 is 5mm, and rotor positioning groove 232 is used for the location when rotor sheet 2 arranges in order.

Referring to fig. 8, the magnetic steel slot 21 includes a slot bottom 211 and two slot edges 212 which are mutually communicated, the connection between the slot bottom 211 and the two slot edges 212 is provided with an arc transition, the distance b between the slot bottom 211 and the circle center of the rotor sheet 2 is 25mm to 30mm, and the width c of the slot edges 212 is 4.3mm to 6mm; the included angle a between the slot edges 212 of each pair of magnetic steel slots 21 is 79-85 degrees, a magnetic bridge 24 is formed between the outer end of the slot edge 212 and the outer arc of the rotor sheet 2, and the thickness d of the magnetic bridge 24 is 1-1.5 mm.

Specifically, the bottom 211 of the grass groove of the magnetic steel groove 21 and one of the groove edges 212 form a ladder shape, the outer sides of the two ends of the grass groove are obliquely arranged, a gap of 1.1mm exists at one end, close to the bottom, of each pair of magnetic steel grooves 21, the structure of the magnetic steel groove 21 on the rotor punching sheet 2 can ensure the balance of a magnetic circuit, the supersaturation of magnetic flux density is effectively prevented, the temperature rise of the motor is low, and the service life of the motor is prolonged.

The embodiments of the present invention are preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, wherein like parts are denoted by like reference numerals. Therefore, the method comprises the following steps: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a motor is with changeing stator combination towards piece, includes stator punching and rotor punching, its characterized in that, stator punching center department sets up the stator centre bore that is used for installing the rotor punching, and the stator punching is connected with the rotor punching linkage, it has 36 stator teeth to be ring shape distribution all around to stator punching inboard, and the vertical cross-section of stator tooth is the T font, has seted up stator winding groove between two adjacent stator teeth, the cell type of stator winding groove is the round bottom pear-shaped groove, the outside circumference interval distribution of stator punching has 4 cramp grooves, and the cramp groove is the inner width trapezoidal structure of narrow outward.

2. The rotor-stator combined punching sheet for the motor as claimed in claim 1, wherein a stator positioning groove is formed in the stator punching sheet at a position 15 ° along the circumferential span of the central axis of the top tab groove, and the radius of the stator positioning groove is 1-2 mm.

3. The rotor-stator combined punching sheet for the motor as claimed in claim 1, wherein the outer profile of the rotor punching sheet is of an arc expansion structure, 8 pairs of magnetic steel slots are circumferentially distributed on the rotor punching sheet, one end of each pair of magnetic steel slots are close to each other to form V-shaped symmetry, the magnetic steel slots are symmetrically arranged along a central line, lightening holes are formed in the positions between each pair of magnetic steel slots which are symmetrical with respect to the axial central line and between each two pairs of adjacent magnetic steel slots, and the diameter of each lightening hole is 4-6 mm.

4. The rotor-stator combined punching sheet for the motor as claimed in claim 3, wherein a rotor center hole for mounting a rotor shaft is formed in the center of the rotor punching sheet, a rectangular boss is arranged at one end of the rotor center hole, a rotor positioning groove is formed in the rotor center hole at a position of 45 degrees along the circumferential span of the rotor axis, and the radius of the rotor positioning groove is 1-2 mm.

5. The rotor-stator combined punching sheet for the motor as claimed in claim 3, wherein the magnetic steel slot comprises a slot bottom and two slot edges which are communicated with each other, a circular arc transition is arranged at the joint of the slot bottom and the two slot edge slots, the distance between the slot bottom and the circle center of the rotor punching sheet is 25 mm-30 mm, and the width of the slot edge is 4.3 mm-6 mm.

6. The rotor-stator combined punching sheet for the motor as claimed in claim 5, wherein an included angle between each pair of magnetic steel slot edges is 79-85 degrees, a magnetic bridge is formed between the outer end of the slot edge and an outer arc of the rotor punching sheet, and the thickness of the magnetic bridge is 1-1.5 mm.