CN210468920U

CN210468920U - Rotor structure and motor

Info

Publication number: CN210468920U
Application number: CN201921086976.XU
Authority: CN
Inventors: 王子周
Original assignee: Shenzhen Hongcheng Technology Co Ltd
Current assignee: Shenzhen Hongcheng Technology Co Ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-05-05
Anticipated expiration: 2029-07-11

Abstract

The utility model relates to a rotor structure and a motor, which comprises a shaft core; the at least two rotor punching sheets are sleeved on the shaft core at intervals; and at least one magnetic sheet is sleeved on the shaft core and is alternately arranged with the rotor punching sheet. The magnetic resistance greatly reduced of this rotor structure has increased magnetic induction line quantity and magnetic flux, and the rate of change of corresponding terrestrial magnetism flux diminishes to effectively reduced the motor inductance, and can increase the moment of torsion when the motor runs at a high speed, further promoted the power take off efficiency of motor.

Description

Rotor structure and motor

Technical Field

The utility model relates to the technical field of electric machines, especially, relate to a rotor structure and motor.

Background

Traditionally, the rotor structure of motor is more adopts rotor punching, magnetism and non-magnetic material combination form, can lead to the during operation motor inductance height like this to can lead to the motor low moment of torsion to appear under the high-speed operation operating mode, influence power take off efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a rotor structure and motor aims at solving the motor inductance height, the low problem of moment of torsion when high-speed operation.

In one aspect, the present application provides a rotor structure comprising

A shaft core;

the at least two rotor punching sheets are sleeved on the shaft core at intervals; and

and the magnetic sheets are sleeved on the shaft core and are alternately arranged with the rotor punching sheets.

In one embodiment, the number of the rotor punching sheets is N, the number of the magnetic sheets is N-1, and the rotor punching sheets and the magnetic sheets are alternately sleeved on the shaft core one by one; wherein: n is a non-zero natural number.

In one embodiment, the number of the magnetic sheets between two adjacent rotor sheets is two or more.

In one embodiment, any adjacent rotor punching sheet is closely attached to the magnetic sheet and the side faces of the magnetic sheet and the magnetic sheet.

In one embodiment, the rotor punching sheet and the magnetic sheet are respectively provided with an assembling through hole, and the diameter of the assembling through hole is matched with the diameter of the shaft core.

In one embodiment, the rotor punching sheet and the magnetic sheet are both circular, and the diameter of the magnetic sheet is smaller than that of the rotor punching sheet.

In one embodiment, the outer periphery of each rotor punching sheet is provided with a plurality of convex teeth arranged at intervals along the circumferential direction, and the convex teeth on two adjacent rotor punching sheets are arranged along the circumferential direction in a staggered manner.

In one embodiment, two adjacent rotor sheets are staggered by half of the convex teeth along the circumferential direction.

In one embodiment, the magnetic sheet is magnetic steel.

Another utility model, this application still provides a motor, and it includes as above rotor structure.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

in the rotor structure and the motor with the novel structure, at least two rotor punching sheets are sleeved on the periphery of the shaft core, and the rotor punching sheets are arranged at intervals; and then sleeving at least one magnetic sheet on the outer periphery of the shaft core, and ensuring that the rotor punching sheets and the magnetic sheets are alternately arranged. Compared with the prior art, the non-magnetic sheet is omitted, the arrangement structure of the rotor punching sheet and the magnetic sheet is optimized, the magnetic resistance of a new rotor structure is greatly reduced, the number of magnetic induction lines and magnetic flux are increased, the change rate of the magnetic flux is correspondingly reduced, the inductive reactance of the motor is effectively reduced, the torque of the motor during high-speed operation can be increased, and the power output efficiency of the motor is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein: 10. the shaft core, 20, rotor punching, 30, magnetic sheet.

Fig. 1 is a schematic structural diagram of a rotor structure according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a rotor structure according to another embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The present application claims a motor, which may be a stepper motor, a servo motor or any other type of motor known in the art, and in this embodiment, the motor is preferably a stepper motor. It can be understood that the motor is mainly composed of a housing, a stator structure mounted on the inner wall of the housing immovably, and a rotor structure mounted in the housing and capable of rotating relative to the stator structure during operation. The stator structure generates a rotating magnetic field to act on the rotor structure so as to generate magnetoelectric power rotating torque, and electric energy is converted into mechanical energy and output.

Referring to fig. 1, in an embodiment, a rotor structure includes: the rotor comprises a shaft core 10, at least two rotor punching sheets 20 and at least one magnetic sheet 30. The shaft core 10 is used for bearing and fixing the rotor punching sheet 20 and the magnetic sheet 30, and the rotor structure rotates relative to the stator structure.

At least two rotor sheets 20 are sleeved on the shaft core 10 at intervals; at least one magnetic sheet 30 is sleeved on the shaft core 10 and is arranged alternately with the rotor punching sheet 20.

at least two rotor sheets 20 are sleeved on the periphery of the shaft core 10, and the rotor sheets 20 are arranged at intervals; then, at least one magnetic sheet 30 is sleeved on the outer periphery of the shaft core 10, and the rotor punching sheets 20 and the magnetic sheets 30 are ensured to be alternately arranged. Compared with the prior art, the non-magnetic sheet 30 is omitted, the arrangement structures of the rotor punching sheets 20 and the magnetic sheets 30 are optimized, the magnetic resistance of a new rotor structure is greatly reduced, the number of magnetic induction lines and magnetic flux are increased, the change rate of the corresponding geomagnetic flux is reduced, the inductive reactance of the motor is effectively reduced, the torque of the motor during high-speed operation can be increased, and the power output efficiency of the motor is further improved.

It can be understood that the magnetic sheet 30 may be made of magnetic steel material, specifically, magnetic silicon steel, which has excellent magnetic induction performance, and can ensure that the motor has higher working efficiency.

Further, in an embodiment, the number of the rotor sheets 20 is N, the number of the magnetic sheets 30 is N-1, and the rotor sheets 20 and the magnetic sheets 30 are alternately sleeved on the shaft core 10 one by one; wherein: n is a non-zero natural number. For example, the rotor punching sheets 20 have four pieces, the magnetic sheets 30 have three pieces, the four pieces of rotor punching sheets 20 are sleeved on the shaft core 10 at intervals along the circumferential direction and form three annular grooves, and the magnetic sheets 30 are sleeved on the shaft core 10 and are embedded in the annular grooves in a one-to-one correspondence manner. The rotor structure formed at the moment is uniform and compact, the magnetic resistance can be effectively reduced, the inductive reactance of the motor is reduced, and the high-speed torque is improved.

As shown in fig. 2, in another embodiment, the number of the rotor sheets 20 closest to the two ends of the shaft core 10 is one, and the rotor sheets 20 in the middle section of the shaft core 10 are arranged in a manner of overlapping two sheets. That is, the middle section of the shaft core 10 is arranged in a manner that one magnetic sheet 30 and two rotor sheets 20 are alternately arranged. According to a calculation formula

It can be seen that the magnetic field intensity of the two stacked rotor sheets 20 increases, the magnetic flux increases, and therefore the change rate of the magnetic flux decreases, so that the inductive reactance value also decreases. Therefore, the aim of reducing the inductive reactance of the motor can be achieved.

Particularly, in actual work, in order to deal with different working conditions, the number of the magnetic sheets 30 between two adjacent rotor sheets 20 may be two or more than two according to the use requirement. Therefore, the performance of reducing the magnetic resistance of the rotor structure can be flexibly changed, and the service performance is improved.

It should be noted that any adjacent rotor sheet 20 and magnetic sheet 30, and magnetic sheet 30 are closely attached to the side surfaces of the magnetic sheet 30. So can avoid having the cooperation gap to cause the magnetic leakage phenomenon to take place, cause the influence to motor operating efficiency. When the rotor sheet 20 and the magnetic sheet 30 are machined and formed, the flatness of the side faces needs to be ensured, so that the rotor sheet can be attached tightly after installation.

In the scheme, in order to facilitate assembly and ensure firm installation, the rotor punching sheet 20 and the magnetic sheet 30 are prevented from falling off from the shaft core 10 when rotating at a high speed, the rotor punching sheet 20 and the magnetic sheet 30 are both provided with assembly through holes, and the diameter of each assembly through hole is matched with the diameter of the shaft core 10. Therefore, the rotor punching sheet 20 and the magnetic sheet 30 can be connected with the shaft core 10 in an interference fit manner, and have high connection fastening force, which can effectively overcome the above problems.

In addition, in an embodiment, the rotor sheet 20 and the magnetic sheet 30 are both circular, and the diameter of the magnetic sheet 30 is smaller than that of the rotor sheet 20. That is, after assembly, when viewed in a direction perpendicular to the axis, a connection line between the rotor punching sheet 20 and the outer peripheral edge of the magnetic sheet 30 forms a wave-crest and wave-trough structure. The arrangement of such a structure is to prevent the magnetic sheet 30 from being worn by mistake and affecting the magnetic induction performance thereof when the outer edge of the rotor sheet 20 is polished.

The outer periphery of each rotor punching sheet 20 is provided with a plurality of convex teeth arranged at intervals along the circumferential direction, and the convex teeth on two adjacent rotor punching sheets 20 are arranged along the circumferential direction in a staggered manner. Through such setting, the convex teeth that circumference dislocation was arranged are in the different angular position of circumference promptly, and during operation, rotor structure follows axle core 10 and rotates, and the convex teeth of different angular position can realize continuous operation in a cycle, guarantees the reliable continuous output power of motor.

More preferably, two adjacent rotor sheets 20 are arranged along the circumferential direction by staggering half of the convex teeth. It can be understood that the offset direction is realized in the tooth width direction of the convex teeth, and a structure that two adjacent rotor sheets 20 are partially overlapped along the axial direction is formed.

Of course, in other embodiments, two adjacent rotor sheets 20 may also be arranged with other dimension offset, for example, offset by two-third of the tooth width.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A rotor structure, comprising

A shaft core;

2. The rotor structure according to claim 1, wherein the number of the rotor sheets is N, the number of the magnetic sheets is N-1, and the rotor sheets and the magnetic sheets are alternately sleeved on the shaft core one by one; wherein: n is a non-zero natural number.

3. The rotor structure according to claim 2, wherein the number of the magnetic sheets between two adjacent rotor sheets is two or more.

4. The rotor structure of claim 1, wherein any adjacent rotor sheet is closely attached to the magnetic sheet and the magnetic sheet is closely attached to the side surface of the magnetic sheet.

5. The rotor structure of claim 1, wherein the rotor sheet and the magnetic sheet are both provided with assembling through holes, and the diameter of each assembling through hole is matched with the diameter of the shaft core.

6. The rotor structure of claim 1, wherein the rotor sheet and the magnetic sheet are both circular, and the diameter of the magnetic sheet is smaller than that of the rotor sheet.

7. The rotor structure as claimed in claim 1, wherein the outer periphery of each rotor sheet is provided with a plurality of convex teeth arranged at intervals along the circumferential direction, and the convex teeth on two adjacent rotor sheets are arranged along the circumferential direction in a staggered manner.

8. The rotor structure as claimed in claim 7, wherein two adjacent rotor sheets are arranged with half of the convex teeth along the circumferential direction.

9. A rotor structure according to any one of claims 1 to 8, wherein the magnetic sheet material is magnetic steel.

10. An electrical machine comprising a rotor structure according to any one of claims 1 to 9.