CN213213203U

CN213213203U - Motor outer rotor structure and motor

Info

Publication number: CN213213203U
Application number: CN202022392520.5U
Authority: CN
Inventors: 王升平; 景玉军; 谢英星; 郭美华
Original assignee: Zhongshan Polytechnic
Current assignee: Zhongshan Polytechnic
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-05-14
Anticipated expiration: 2030-10-23

Abstract

The utility model discloses an outer rotor structure of a motor and a motor, which comprises a rotor core; the rotor iron core is arranged on the inner wall surface of the rotor bracket, and a through hole is formed in the rotor bracket; the rotating shaft penetrates through the through hole and is connected with the rotor bracket through a connecting structure; the inner ring of the first bearing is connected with the rotating shaft, and the outer ring of the first bearing is connected with the inner shell of the motor; the inner ring of the second bearing is connected with the rotating shaft, the outer ring of the second bearing is connected with the inner shell of the motor, the first bearing and the second bearing are arranged on the part of the rotating shaft, which is positioned in the rotor core, and the diameter of the first bearing is smaller than that of the second bearing; the permanent magnet assemblies are arranged on the inner wall surface of the rotor core and are uniformly distributed along the circumferential direction; the utility model has the advantages of axial dimensions is compact, the reliability is high, inertia is big, operate steadily, heat dispersion is good, efficient, the high-efficient compact generator technology key problem of electric automobile increases journey ware has been solved.

Description

Motor outer rotor structure and motor

Technical Field

The utility model relates to a motor field, in particular to motor outer rotor structure and motor.

Background

The range-extended electric automobile technology is generally accepted in the industry nowadays, and will become an important development direction in the technical field of new energy automobiles in future, China also clearly provides a technology for developing a range-extended generator, the development of a high-efficiency and high-density generator is focused, whether the range-extended electric automobile with excellent performance, low oil consumption and good emission can be developed mainly depends on the range-extended generator technology, the generator for the range-extended generator is used as important energy supply equipment in a system, and is one of key technologies which need to be solved and perfected urgently in the technical development of the range-extended electric automobile, the development of a high-efficiency compact generator for the range-extended generator is imperative, the generator for the traditional range-extended generator mostly adopts an inner rotor structure, the structure is complex, the inner space is small, multiple poles are not easy to realize, heat is easy to gather in the motor during operation to influence the performance of the motor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a motor external rotor structure and a motor.

The utility model discloses a technical scheme that its technical problem was solved to an embodiment adopted is: an electric machine outer rotor structure comprising:

a rotor core;

the rotor iron core is arranged on the inner wall surface of the rotor bracket, and a through hole is formed in the rotor bracket;

the rotating shaft penetrates through the through hole and is connected with the rotor bracket through a connecting structure;

the inner ring of the first bearing is connected with the rotating shaft, and the outer ring of the first bearing is connected with the inner shell of the motor;

the inner ring of the second bearing is connected with the rotating shaft, the outer ring of the second bearing is connected with the inner shell of the motor, the first bearing and the second bearing are arranged on the part of the rotating shaft, which is positioned in the rotor core, and the diameter of the first bearing is smaller than that of the second bearing;

and the permanent magnet assemblies are arranged on the inner wall surface of the rotor core and are uniformly arranged along the circumferential direction.

Further, the connection structure includes:

the first riveting hole is arranged on the rotor bracket;

the fixing ring is sleeved on the rotating shaft;

the second riveting hole is arranged on the fixing ring;

and the rivet is riveted with the first riveting hole and the second riveting hole simultaneously.

Further, the permanent magnet assembly comprises 4 groups of permanent magnet groups, and each group of permanent magnet groups comprises 32 permanent magnets which are arranged on the inner wall surface of the rotor core and are arranged along the circumferential direction.

Furthermore, a limiting boss is arranged between every two adjacent permanent magnets.

Further, the permanent magnet is made of a neodymium iron boron rare earth permanent magnet material.

Further, the rotor core is connected with the inner wall of the rotor support in a hot sleeve mode.

Further, the rotating shaft is of a hollow structure.

Furthermore, a plurality of lightening holes are formed in the rotor support.

An electric machine comprises the outer rotor structure of the electric machine.

The utility model has the advantages that: an outer rotor structure of a motor and a motor comprise a rotor core; the rotor iron core is arranged on the inner wall surface of the rotor bracket, and a through hole is formed in the rotor bracket; the rotating shaft penetrates through the through hole and is connected with the rotor bracket through a connecting structure; the inner ring of the first bearing is connected with the rotating shaft, and the outer ring of the first bearing is connected with the inner shell of the motor; the inner ring of the second bearing is connected with the rotating shaft, the outer ring of the second bearing is connected with the inner shell of the motor, the first bearing and the second bearing are arranged on the part of the rotating shaft, which is positioned in the rotor core, and the diameter of the first bearing is smaller than that of the second bearing; the permanent magnet assemblies are arranged on the inner wall surface of the rotor core and are uniformly distributed along the circumferential direction; the utility model has the advantages of axial dimensions is compact, the reliability is high, inertia is big, operate steadily, heat dispersion is good, efficient, the high-efficient compact generator technology key problem of electric automobile increases journey ware has been solved.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a partial structural schematic diagram of an outer rotor structure of a motor.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as excluding the number, and the terms greater than, less than, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly defined, the terms "set," "mounted," "connected," and the like are to be understood in a broad sense, and may be directly connected or indirectly connected through an intermediate medium, for example; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be a mechanical connection; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

Referring to fig. 1, an outer rotor structure of a motor includes:

a rotor core 10;

the rotor support 20, the rotor core 10 is arranged on the inner wall surface of the rotor support 20, and a through hole is arranged on the rotor support 20;

a rotating shaft 30 passing through the through hole and connected to the rotor holder 20 through a connection structure;

a first bearing 40, the inner ring of which is connected with the rotating shaft 30 and the outer ring of which is connected with the inner casing of the motor;

a second bearing 50, an inner ring of which is connected with the rotating shaft 30, an outer ring of which is connected with an inner casing of the motor, the first bearing 40 and the second bearing 50 are arranged on a part of the rotating shaft 30, which is positioned in the rotor core 10, and the diameter of the first bearing 40 is smaller than that of the second bearing 50;

and permanent magnet assemblies which are arranged on the inner wall surface of the rotor core 10 and are uniformly arranged along the circumferential direction.

The utility model discloses mainly be applied to electric automobile range extender, this range extender requires high-efficient compactness, lightweight and high reliability, and the utility model discloses an adopt one big one little two bearings and novel permanent magnet subassembly, can let external rotor electric machine have axial dimension compactness, high reliability, inertia is big, operate steadily, heat dispersion is good, efficient advantage, specifically, rotor core 10 uses silicon steel sheet blanking and stack to make, permanent magnet 70 is the sectional type, has the cuboid form of radian, spacing boss plays spacing effect to between two adjacent permanent magnets 70, let permanent magnet 70 have better structural stability; the rotor core 10 or the rotor support 20 is also provided with a limit boss for placing the rotor core 10 and the rotor support 20 to rotate relatively when rotating, the rotor support 20 is made of high-strength cast steel, the outer surface of the rotor support is round and smooth, the wind friction loss of the rotor is effectively reduced, the rotor support 20 and the rotating shaft 30 are connected at the end face through a high-strength rivet 64, the end face of the rotor support 20 is provided with a proper lightening hole 80 for reducing the overall weight of the outer rotor structure, and the rotating shaft 30 is a hollow structure for reducing the overall weight of the outer rotor structure.

The connection structure includes:

a first staking hole 61 provided in the rotor holder 20;

the fixing ring 62 is sleeved on the rotating shaft 30;

a second riveting hole 63 provided in the fixing ring 62;

and a rivet 64 simultaneously riveted to the first and second riveting

holes

61 and 63.

The permanent magnet assembly includes 4 groups of permanent magnet groups, each of which includes 32 permanent magnets 70 disposed on the inner wall surface of the rotor core 10 and arranged in the circumferential direction.

A limiting boss is arranged between every two adjacent permanent magnets 70.

The permanent magnet 70 is made of a neodymium iron boron rare earth permanent magnet material.

The rotor core 10 is connected with the inner wall of the rotor bracket 20 by means of a shrink fit.

The rotating shaft 30 has a hollow structure.

The rotor support 20 is provided with a plurality of lightening holes 80.

Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications and substitutions are included in the scope defined by the claims of the present application.

Claims

1. An outer rotor structure of an electric machine, comprising:

a rotor core (10);

the rotor core (10) is arranged on the inner wall surface of the rotor support (20), and a through hole is formed in the rotor support (20);

the rotating shaft (30) penetrates through the through hole and is connected with the rotor bracket (20) through a connecting structure;

a first bearing (40), the inner ring of which is connected with the rotating shaft (30), and the outer ring of which is connected with the inner shell of the motor;

the inner ring of the second bearing (50) is connected with the rotating shaft (30), the outer ring of the second bearing is connected with the inner shell of the motor, the first bearing (40) and the second bearing (50) are arranged on the part, located in the rotor core (10), of the rotating shaft (30), and the diameter of the first bearing (40) is smaller than that of the second bearing (50);

and the permanent magnet assemblies are arranged on the inner wall surface of the rotor core (10) and are uniformly arranged along the circumferential direction.

2. The external rotor structure of an electric machine as claimed in claim 1, wherein the connection structure comprises:

a first staking hole (61) provided in the rotor holder (20);

the fixing ring (62) is sleeved on the rotating shaft (30);

the second riveting hole (63) is formed in the fixing ring (62);

and a rivet (64) which is riveted with the first riveting hole (61) and the second riveting hole (63) at the same time.

3. The external rotor structure of an electric machine according to claim 1, wherein: the permanent magnet assembly comprises 4 groups of permanent magnet groups, and each group of permanent magnet groups comprises 32 permanent magnets (70) which are arranged on the inner wall surface of the rotor core (10) and arranged along the circumferential direction.

4. The external rotor structure of an electric machine according to claim 1, wherein: and a limiting boss is arranged between every two adjacent permanent magnets (70).

5. The external rotor structure of an electric machine according to claim 4, wherein: the permanent magnet (70) is made of a neodymium iron boron rare earth permanent magnet material.

6. The external rotor structure of an electric machine according to claim 1, wherein: the rotor iron core (10) is connected with the inner wall of the rotor bracket (20) in a hot jacket mode.

7. The external rotor structure of an electric machine according to claim 1, wherein: the rotating shaft (30) is of a hollow structure.

8. The external rotor structure of an electric machine according to claim 1, wherein: the rotor support (20) is provided with a plurality of lightening holes (80).

9. An electric machine characterized by: an electric machine outer rotor structure comprising any one of claims 1-8.