CN218633502U

CN218633502U - Oblique pole structure of motor rotor

Info

Publication number: CN218633502U
Application number: CN202222863931.7U
Authority: CN
Inventors: 李林芸
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2022-10-29
Filing date: 2022-10-29
Publication date: 2023-03-14
Anticipated expiration: 2032-10-29

Abstract

The utility model provides a motor rotor oblique pole structure, which is formed by a plurality of rotor core components in a press-fitting manner, wherein each rotor core component is provided with a first positioning hole, a second positioning hole and a magnetic steel groove; the first positioning holes and the second positioning holes are paired, the two positioning holes are symmetrically distributed on one side close to the inner diameter of the rotor iron core assembly, the magnetic steel grooves are uniformly distributed on one side close to the outer diameter of the rotor iron core assembly, the first positioning holes are located on a radial central line between the two adjacent magnetic steel grooves, the included angle between the second positioning holes and the radial central line is theta, and the included angle between the second positioning holes and the adjacent first positioning holes is 90-theta.

Description

Oblique pole structure of motor rotor

Technical Field

The utility model is used for the automobile drive motor field, more specifically relates to a motor rotor slant utmost point structure.

Background

With the continuous development of new energy automobiles, the built-in permanent magnet synchronous motor is widely applied due to the advantages of simple structure, high power density, wide speed regulation range, high efficiency and the like.

The stator skewed slot and the rotor skewed pole can effectively weaken the tooth harmonic wave of the motor and reduce the cogging torque and the torque ripple of the motor, but the manufacturing process of the stator skewed slot is complex, so the rotor skewed pole is usually used for realizing the functions of restraining the harmonic wave and reducing the torque ripple.

The motor rotor skewed pole is a technology for reducing motor torque fluctuation, and generally, a motor rotor iron core is divided into a plurality of sections, and each section of iron core deflects by the same angle and then is superposed together to form a skewed pole iron core. Rotor skewed poles are generally characterized in that the relative angle of each section of iron core is positioned through key teeth on an inner hole of the rotor iron core and a key groove on a shaft, or the deflection of each section of iron core is ensured by tooling equipment during assembly to fix the angle.

In the patent CN205945292U "a rotor skewed pole structure of a permanent magnet synchronous motor", the angle of the rotor skewed pole is ensured by matching key slots on inner holes of different segmented rotors with key teeth of the same rotor shaft; in patent CN208835917U, the motor rotating shaft, the motor rotor skewed pole structure, the permanent magnet synchronous motor, and the electric vehicle realize the rotor skewed pole positioning function by matching different key slots on the rotor shaft with key teeth on the inner hole of the rotor in the same section. But with keyway location can cause rotor packaging efficiency to reduce, use keyway location to have the requirement to rotor shaft and rotor core assembly area's size simultaneously: when the shaft diameter of the rotor shaft is small and the number of required oblique pole sections is large, the strength of the rotor shaft is considered, and sufficient key grooves cannot be machined; when the shaft diameter of the rotor shaft is large, oil needs to be introduced into the rotor shaft, and the wall thickness is thin, the key groove is difficult to process by considering the strength of the rotor shaft; both of these cases will not be able to use a keyway to locate the ramp. And the equipment precision requirement is high and the equipment investment is large when the equipment is used for positioning.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model discloses an it is simple and easy-to-use rotor core slant utmost point location technology structure to design. The effect that can improve assembly efficiency reduce cost is reached, the condition that the rotor can not use the keyway location is solved.

The technical scheme of the utility model is that:

the utility model provides a motor rotor oblique pole structure, which is formed by a plurality of rotor iron core components in a press-fitting manner, wherein each rotor iron core component is provided with a first positioning hole, a second positioning hole and a magnetic steel groove;

the first positioning holes and the second positioning holes are paired, the two positioning holes are symmetrically distributed on the inner side of the inner diameter of the rotor iron core assembly, the two positioning holes are symmetrically distributed on one side close to the inner diameter of the rotor iron core assembly, the magnetic steel grooves are uniformly distributed on one side close to the outer diameter of the rotor iron core assembly, the first positioning holes are located on a radial central line between the two adjacent magnetic steel grooves, the included angle between the second positioning holes and the radial central line is theta, and the included angle between the second positioning holes and the adjacent first positioning holes is 90-theta.

Preferably, when the three continuous rotor core assemblies are pressed, the formed rotor slant-pole structure is a linear rotor slant-pole structure when the pressing surface of the first rotor core assembly is the front surface and the pressing surface of the third rotor core assembly is the back surface;

when the three continuous rotor core assemblies are pressed, when the pressing surface of the first rotor core assembly is the front surface and the pressing surface of the third rotor core assembly is the front surface, the formed rotor slant pole structure is a V-shaped rotor slant pole structure;

when the press-mounting surface of the first rotor core assembly is the front surface and the press-mounting surface of the third rotor core assembly is the back surface, the second positioning hole of the first rotor core assembly is opposite to the second positioning hole of the third rotor core assembly, and the first positioning hole of the third rotor core assembly is positioned at a position which has a difference of 2 theta with the first positioning hole of the first rotor core assembly;

when the press-fitting surface of the first rotor core assembly is the front surface and the press-fitting surface of the third rotor core assembly is the front surface, the second positioning hole of the first rotor core assembly is opposite to the second positioning hole of the third rotor core assembly, and the first positioning hole of the third rotor core assembly is opposite to the first positioning hole of the first rotor core assembly.

Preferably, when the rotor slant-pole structure formed by press mounting of the three continuous rotor core assemblies is an in-type rotor slant-pole structure, the first positioning hole of the first rotor core assembly, the second positioning hole of the second rotor core assembly and the first positioning hole of the third rotor core assembly are opposite, the angular deviation between the magnetic steel slot of the first rotor core assembly and the magnetic steel slot of the second rotor core assembly is theta, and the angular deviation between the magnetic steel slot of the second rotor core assembly and the magnetic steel slot of the third rotor core assembly is theta.

The utility model has the advantages that: through the pressure equipment position that changes rotor core subassembly and go up locating hole one, can realize that first, third rotor core subassembly's locating hole two and second rotor core subassembly's locating hole one form the through-hole and punch a hole the location, make the motor rotor that forms utmost point structure to one side of an inclined structure or V style of calligraphy motor rotor utmost point structure to one side, can realize multiple rotor utmost point shape to one side by same set of rotor core subassembly, practice thrift the die sinking expense. Through perforation positioning, the precision requirement of the iron core positioning equipment in rotor assembly is reduced, and the equipment cost can be reduced under the condition of ensuring the same precision grade.

Drawings

Fig. 1 is a schematic view of a rotor slant-pole structure in the present embodiment;

FIG. 2 is a schematic view of a rotor core assembly according to the present embodiment;

FIG. 3 is a sectional view of positioning holes of the three-stage rotor slant-pole structure shown in FIG. 1;

FIG. 4 is a schematic view of a "one" type skewed pole of the skewed pole structure of the rotor of FIG. 1;

FIG. 5 is a schematic view of a "V" skewed pole configuration of the third rotor core assembly of the skewed pole configuration of the rotor of FIG. 1 without reverse press-fitting;

1-a rotor core assembly;

11-a first positioning hole;

12-a second positioning hole;

13-iron core magnetic steel slot.

Detailed Description

As shown in fig. 1 to 5, in this embodiment, a method is provided for positioning a rotor slant pole by using positioning holes with fixed angular deviation θ (angular deviation is related to the design of slant pole angle) distributed unevenly and using a positioning column to cooperate with the positioning holes when the rotor cannot be positioned by using a key slot.

This rotor core slant utmost point location technology structure includes: the rotor comprises a plurality of rotor core components 1, wherein the rotor core components 1 form a rotor slant pole structure which is finally required, and each rotor core component 1 comprises a first positioning hole 11, a second positioning hole 12 and a magnetic steel groove 13.

As shown in fig. 1, the three rotor core assemblies 1 are pressed together to form a "one-line" rotor skewed pole structure. As shown in fig. 2, the rotor core assembly 1 is provided with a first positioning hole 11, a second positioning hole 12, and a magnetic steel slot 13. The first positioning holes 11 and the first positioning holes 12 are arranged in pairs, the first two positioning holes 11 are symmetrically distributed on one side, close to the inner diameter, of the rotor iron core assembly 1, the second two positioning holes 12 are symmetrically distributed on one side, close to the inner diameter, of the rotor iron core assembly 1, the first positioning holes 11 are located in the middle of the two iron core magnetic steel grooves 13, included angles between the second positioning holes 12 and the first positioning holes 11 are included, and the magnetic steel grooves 13 are evenly distributed on one side, close to the outer diameter, of the rotor iron core assembly 1. When the three rotor iron core components 1 are pressed, the matching sequence of the positioning holes is the positioning hole II 12 of the first rotor iron core component 1, the positioning hole I11 of the second rotor iron core component 1 and the positioning hole II 12 of the third rotor iron core component 1, and at the moment, the axes of the matched positioning holes are positioned on the same line, so that positioning columns can penetrate through the positioning holes to realize rotor slant pole positioning. After the press mounting is completed, the angular deviation of the magnetic steel groove 13 of the first rotor core assembly 1 and the magnetic steel groove 13 of the second rotor core assembly 1 is theta, and the angular deviation of the magnetic steel groove 13 of the second rotor core assembly 1 and the magnetic steel groove 13 of the third rotor core assembly 1 is theta, namely, the rotor assembly completes oblique pole positioning.

Wherein the positive and negative directions of the press-fit faces of the first rotor core assembly 1 and the third rotor core assembly 1 determine the type of rotor skewed pole. When the press-fitting surface of the first rotor iron core component 1 is the front surface and the press-fitting surface of the third rotor iron core component 1 is the back surface, the structure is a linear rotor oblique pole structure; when the press-fit surface of the first rotor core assembly 1 is the front surface and the press-fit surface of the third rotor core assembly 1 is the front surface, the rotor is in a V-shaped rotor oblique-pole structure.

When the press-fitting surface of the first rotor core assembly is the front surface and the press-fitting surface of the third rotor core assembly 1 is the reverse surface, the position of the second positioning hole 12 of the first rotor core assembly 1 is opposite to that of the second positioning hole 12 of the third rotor core assembly 1, and the position of the first positioning hole 11 of the third rotor core assembly 1 is different by 2 theta from that of the first positioning hole 11 of the first rotor core assembly 1.

When the press-fitting surface of the first rotor core assembly 1 is the front surface and the press-fitting surface of the third rotor core assembly 1 is the front surface, the second positioning hole 12 of the first rotor core assembly 1 is opposite to the second positioning hole 12 of the third rotor core assembly 1, and the first positioning hole 11 of the third rotor core assembly 1 is opposite to the first positioning hole 11 of the first rotor core assembly 1.

Adopt different locating holes, can realize multiple rotor oblique utmost point shape by same set of rotor core subassembly mould, for example "one" type, "V" type etc.. The die sinking cost is saved.

Through perforation positioning, the precision requirement of iron core positioning equipment in rotor assembly is reduced, and equipment cost can be reduced under the condition of ensuring the same precision grade.

The increase or decrease in the diameter of the pilot holes and the change in the size of the included angle between the pilot holes may be understood as variations and modifications of the foregoing structure without departing from the concepts of the present invention, and further, it is to be understood that such concepts are intended to be covered by the following claims unless these claims by their language expressly state otherwise.

Claims

1. A motor rotor oblique pole structure is characterized in that the motor rotor oblique pole structure is formed by press-mounting a plurality of rotor iron core components, and each rotor iron core component is provided with a first positioning hole, a second positioning hole and a magnetic steel groove;

the first positioning holes and the second positioning holes are paired, the two positioning holes are symmetrically distributed on one side close to the inner diameter of the rotor iron core assembly, the magnetic steel grooves are uniformly distributed on one side close to the outer diameter of the rotor iron core assembly, the first positioning holes are located on a radial central line between the two adjacent magnetic steel grooves, the included angle between the second positioning holes and the radial central line is theta, and the included angle between the second positioning holes and the adjacent first positioning holes is 90-theta.

2. The motor rotor skewed pole structure of claim 1, wherein when three consecutive rotor core assemblies are press-fitted, the press-fitted surface of the first rotor core assembly is a front surface and the press-fitted surface of the third rotor core assembly is a back surface, the formed rotor skewed pole structure is a straight rotor skewed pole structure;

when the press-mounting surface of the first rotor core assembly is the front surface and the press-mounting surface of the third rotor core assembly is the back surface, the second positioning hole of the first rotor core assembly is opposite to the second positioning hole of the third rotor core assembly in position, and the first positioning hole of the third rotor core assembly is positioned at a position which is different from the first positioning hole of the first rotor core assembly by 2 theta;

when the press-fitting surface of the first rotor core assembly is positive and the press-fitting surface of the third rotor core assembly is positive, the second positioning hole of the first rotor core assembly is opposite to the second positioning hole of the third rotor core assembly, and the first positioning hole of the third rotor core assembly is opposite to the first positioning hole of the first rotor core assembly.

3. The rotor slant pole structure of the motor according to claim 2, wherein when the rotor slant pole structure formed by press-fitting of three consecutive rotor core assemblies is a one-type rotor slant pole structure, the second positioning hole of the first rotor core assembly, the first positioning hole of the second rotor core assembly and the second positioning hole of the third rotor core assembly are opposite to each other, an angular deviation between the magnetic steel slot of the first rotor core assembly and the magnetic steel slot of the second rotor core assembly is θ, and an angular deviation between the magnetic steel slot of the second rotor core assembly and the magnetic steel slot of the third rotor core assembly is θ.