CN213279301U

CN213279301U - Motor rotor structure

Info

Publication number: CN213279301U
Application number: CN202022343814.9U
Authority: CN
Inventors: 曾欠欢; 陈静; 吴从波
Original assignee: ZHEJIANG FOUNDER MOTOR CO Ltd
Current assignee: ZHEJIANG FOUNDER MOTOR CO Ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-05-25
Anticipated expiration: 2030-10-20

Abstract

The utility model relates to an electric motor rotor structure, including axle and rotor core, the rotor core cover is established epaxially, and rotor core and axle interference fit, and rotor core piles up by a plurality of rotor punching and constitutes, and even interval sets up the lug on the hole pore wall of rotor punching for the hole pore wall of rotor punching forms continuous adjacent crest and trough, and two adjacent crest and the trough of tooth of rotor punching align from top to bottom, and rotor core and axle installation back, the crest upwards perhaps turns over into in the trough downwards. The utility model discloses the effective control cold-presses the random turn-ups condition of in-process and reduces the influence of metal debris to the pressure equipment in-process, avoids the rotor to skid, and then improves the stability of rotor operation.

Description

Motor rotor structure

Technical Field

The utility model belongs to the technical field of the motor, specifically speaking relates to an electric motor rotor structure.

Background

The new energy automobile driving motor has large torque and high rotating speed. With increasing rotational speed, the requirements on the rotor assembly are higher and higher. At present, rotor cores and shafts commonly used by high-speed permanent magnet synchronous motors are matched in various modes, such as key groove matching and optical axis matching. The optical axis matching adopts cold pressing, hot pressing and other technological modes.

The most widely applied process mode in optical axis matching is a cold pressing mode: simple process and low cost. The torque demand on the motor is increasingly large, and the interference magnitude of the matching of the rotor core and the optical axis needs to be improved. The irregular flanging condition of the inner hole can occur in the cold pressing process of large interference magnitude, the actual assembly effect is influenced, meanwhile, the interference magnitude of theoretical design cannot be reached, the reliability of a rotor assembly is influenced, the rotor can slip due to serious conditions, the power of a driving motor is lost, the service life of the whole machine is greatly shortened, and therefore the problem of how to effectively control the flanging of the inner hole of the rotor in the cold pressing process becomes an important research subject under the limitation of limited space size and cost.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing an electric motor rotor structure that can bear great moment of torsion and move more reliably.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

the utility model provides an electric motor rotor structure, includes axle and rotor core, the rotor core cover is established epaxially, and rotor core and axle interference fit, rotor core piles up by a plurality of rotor punching and constitutes, even interval sets up the lug on the hole pore wall of rotor punching for the hole pore wall of rotor punching forms consecutive adjacent crest and trough, and the crest and the trough of tooth of two adjacent rotor punching from top to bottom align, and rotor core and axle installation back, the crest of tooth upwards or turn over the interior trough of tooth of rolling over downwards.

Preferably, the tooth peak of the rotor punching sheet is semicircular, triangular, rectangular or trapezoidal.

Preferably, the shaft is an optical axis, and a convex ring for limiting the rotor core is further arranged at one end of the shaft.

As the preferred scheme, still equidistance interval is equipped with the multiunit rectangle through-hole that is used for installing the magnet steel on the rotor punching, every group rectangle through-hole is 2, and forms V-arrangement.

The utility model discloses to traditional driving motor rotor core structure innovation point lies in: the inner hole tooth-shaped structure of the rotor punching sheet is added, each rotor punching sheet is overlapped by adopting a specified design rotation angle, the regular distribution of the inner hole teeth is realized, and the contact with the surface of an optical axis is increased. Simultaneously, this new rotor core structure is at the in-process of colding pressing, lower floor (or upper strata) hole tooth crest can be regular upwards (or downwards) turn-ups, and turn-ups's hole tooth crest part in can filling last piece (or next piece) rotor punching piece hole tooth valley to the irregular turn-ups condition of effective control in-process of colding pressing and reduction metallic debris are to the influence of pressure equipment in-process, avoid the rotor to skid, and then improve the stability of rotor operation.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic view of a rotor structure of the present invention;

fig. 2 is a schematic structural view of a rotor core according to the present invention;

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

fig. 4 is an enlarged schematic view of a partial structure of a rotor sheet of the present invention;

fig. 5 is the utility model discloses adjacent two rotor sheets stack up's structural schematic.

Wherein the reference numerals are: 1. rotor punching sheets; 11. a tooth crest; 12. a tooth valley; 13. an inner bore; 14. a rectangular through hole; 2. a shaft.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

As shown in fig. 1 to 5, the motor rotor structure comprises a shaft 2 and a rotor core, wherein the rotor core is sleeved on the shaft 2, the rotor core is in interference fit with the shaft 2, the shaft 2 is an optical axis, and one end of the shaft 2 is further provided with a convex ring for axially limiting the rotor core.

As shown in fig. 2 and 3, the rotor core is formed by stacking a plurality of rotor laminations 1, inner holes 13 of the rotor laminations 1 are in a tooth-shaped structure, specifically, as shown in fig. 4, lugs are uniformly arranged on the hole walls of the inner holes 13 of the rotor laminations 1 at intervals, so that the hole walls of the inner holes 13 of the rotor laminations 1 form continuous adjacent tooth peaks 11 and tooth valleys 12, the tooth peaks 11 of two adjacent upper and lower rotor laminations 1 are aligned with the tooth valleys 12, and after the rotor core is mounted on a shaft 2, the tooth peaks 11 are folded into the tooth valleys 12 upwards or downwards.

The utility model discloses increase hole profile of tooth structure, every rotor punching is folded and is adopted appointed design rotation angle to fold and press, and two adjacent rotor punching's 1 crest 11 aligns with the tooth valley 12 about promptly, has realized that the hole tooth rule distributes, increases and optical axis surface contact. Simultaneously, this new rotor core structure is at the in-process of colding pressing, and lower floor (or upper strata) hole tooth crest can be regular upwards (or downwards) turn-ups, and the interior hole tooth crest part of turn-ups can fill last one slice (or next one slice) and punch the interior hole tooth valley to the irregular turn-ups condition of in-process is colded pressing to effective control and the influence of cold pressing in-process metal piece to the pressure equipment in-process is effectively reduced.

The tooth peak 11 of the rotor punching sheet 1 is semicircular, triangular, rectangular or trapezoidal, etc., a plurality of groups of rectangular through holes 14 for mounting magnetic steel are further arranged on the rotor punching sheet 1 at equal intervals, and each group of rectangular through holes 14 is 2 and is arranged in a V shape.

The utility model discloses a novel prevent hole turn-ups rotor core structure of colding pressing, assembly process is simple, and the processing cost is lower relatively. The irregular flanging condition of the inner hole in the cold pressing process is effectively controlled, the reliability of the drive motor rotor assembly after press mounting is effectively prolonged, and the service life of the drive motor is prolonged.

Claims

1. The utility model provides an electric motor rotor structure, includes axle (2) and rotor core, the rotor core cover is established on axle (2), and rotor core and axle (2) interference fit, rotor core piles up by a plurality of rotor punching (1) and constitutes its characterized in that: the rotor punching sheet is characterized in that lugs are uniformly arranged on the hole wall of an inner hole (13) of the rotor punching sheet (1) at intervals, so that the hole wall of the inner hole (13) of the rotor punching sheet (1) forms continuous adjacent tooth peaks (11) and tooth valleys (12), the tooth peaks (11) of two adjacent rotor punching sheets (1) are aligned with the tooth valleys (12), and after a rotor iron core and a shaft (2) are installed, the tooth peaks (11) are upwards or downwards folded into the tooth valleys (12).

2. The motor rotor structure as claimed in claim 1, wherein the tooth crest (11) of the rotor punching sheet (1) is semicircular, triangular, rectangular or trapezoidal.

3. A rotor structure of an electric machine according to claim 1, characterized in that the shaft (2) is an optical shaft, and a protruding ring for limiting the rotor core is further provided at one end of the shaft (2).

4. The motor rotor structure according to claim 1, wherein a plurality of groups of rectangular through holes (14) for mounting magnetic steel are further arranged on the rotor sheet (1) at equal intervals, and each group of rectangular through holes (14) is 2 and is arranged in a V shape.