CN215990392U

CN215990392U - Brushless DC motor

Info

Publication number: CN215990392U
Application number: CN202122080808.3U
Authority: CN
Inventors: 陈雪江
Original assignee: Zhejiang Chuanghong Intelligent Technology Co ltd
Current assignee: Zhejiang Chuanghong Intelligent Technology Co ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-03-08
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a brushless DC motor, comprising: the metal casing with be located stator, rotor core of metal casing, this rotor core is located the stator, metal protecgulum and metal back lid are installed respectively to terminal surface and rear end face before the metal casing, rotor core is fixed in the outside surface of a rotor shaft, the rotor shaft both ends are connected with metal protecgulum and metal back lid through front bearing and rear bearing respectively, are located the external screw thread of metal protecgulum side surface and the internal thread swivelling joint of metal casing internal surface, the terminal surface that the metal casing is close to lid one side behind the metal is provided with 3 at least riveting point portions along circumference, and this metal casing is connected with the metal back lid through 3 at least riveting point portions. The direct current brushless motor is convenient for motor assembly and subsequent disassembly and maintenance, and simultaneously, the electromagnetic flux of the stator and the rotor winding is enhanced, so that the power and the efficiency of the motor are improved.

Description

Brushless DC motor

Technical Field

The utility model relates to the technical field of direct current motors, in particular to a direct current brushless motor.

Background

The structure of the direct current motor is composed of a stator and a rotor, wherein the stationary part of the direct current motor is called the stator when the direct current motor operates, the stator mainly functions to generate a magnetic field, the rotating part of the direct current motor is called the rotor when the direct current motor operates, the main functions of the rotor are to generate electromagnetic torque and induced electromotive force, and the rotor is a pivot for energy conversion of the direct current motor, so the rotor is also called an armature. Direct current motors are widely used due to their good speed regulation performance, but there is still room for improvement in existing direct current motors.

Disclosure of Invention

The utility model aims to provide a direct current brushless motor, which is convenient for motor assembly and subsequent disassembly and maintenance, and simultaneously enhances the electromagnetic flux of stator and rotor windings, thereby improving the power and the efficiency of the motor.

In order to achieve the purpose, the utility model adopts the technical scheme that: a dc brushless motor comprising: the metal casing with be located stator, rotor core of metal casing, this rotor core is located the stator, metal protecgulum and metal back lid are installed respectively to terminal surface and rear end face before the metal casing, rotor core is fixed in the outside surface of a rotor shaft, the rotor shaft both ends are connected with metal protecgulum and metal back lid through front bearing and rear bearing respectively, are located the external screw thread of metal protecgulum side surface and the internal thread swivelling joint of metal casing internal surface, the terminal surface that the metal casing is close to lid one side behind the metal is provided with 3 at least riveting point portions along circumference, and this metal casing is connected with the metal back lid through 3 at least riveting point portions.

The further improved scheme in the technical scheme is as follows:

1. in the above scheme, the rear bearing is located on the inner side of the outer end face of the metal rear cover.

2. In the above scheme, the diameter ratio of the length of the metal casing to the metal front cover and the metal rear cover is 1: 0.9 to 1.1.

3. In the scheme, the rotor shaft is connected with the inner rings of the front bearing and the rear bearing in an interference fit mode.

4. In the above scheme, the metal casing is an aluminum casing, and the metal front cover and the metal rear cover are both aluminum covers.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model relates to a direct current brushless motor, wherein two ends of a rotor shaft are respectively connected with a metal front cover and a metal rear cover through a front bearing and a rear bearing, external threads on the side surface of the metal front cover are rotatably connected with internal threads on the inner surface of a metal shell, at least 3 riveting point parts are arranged on the end surface of the metal shell close to one side of the metal rear cover along the circumferential direction, the metal shell is connected with the metal rear cover through at least 3 riveting point parts, the motor assembly and the subsequent disassembly and maintenance are facilitated, and meanwhile, the stator and the rotor winding form a metal sealed whole, the electromagnetic flux of the stator and the rotor winding is enhanced, thereby improving the power and the efficiency of the motor.

Drawings

FIG. 1 is a schematic structural diagram of a brushless DC motor according to the present invention;

FIG. 2 is a left side view schematic of the structure of FIG. 1;

FIG. 3 is a schematic structural diagram of a metal front cover in the DC brushless motor of the present invention;

fig. 4 is a schematic structural diagram of a metal housing in the dc brushless motor according to the present invention.

In the above drawings: 1. a metal housing; 2. a stator; 3. a rotor core; 4. a metal front cover; 5. a metal rear cover; 6. a rotor shaft; 7. a front bearing; 8. a rear bearing; 9. an external thread; 10. an internal thread; 11. and riveting the point part.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1: a dc brushless motor comprising: metal casing 1 and stator 2, rotor core 3 that are located metal casing 1, this rotor core 3 is located stator 2, lid 5 behind metal protecgulum 4 and the metal is installed respectively to terminal surface and the rear end face before metal casing 1, rotor core 3 is fixed in the outside surface of a rotor shaft 6, lid 5 is connected after 6 both ends of rotor shaft pass through fore bearing 7 and rear bearing 8 and metal protecgulum 4 and metal respectively, is located the external screw thread 9 of 4 side surfaces of metal protecgulum and the internal thread 10 swivelling joint of metal casing 1 internal surface, the terminal surface that metal casing 1 is close to lid 5 one side behind the metal is provided with 3 at least riveting point portions 11 along circumference, and this metal casing 1 is connected with lid 5 behind the metal through 3 at least riveting point portions 11.

The diameter ratio of the length of the metal casing 1 to the metal front cover 4 and the metal rear cover 5 is 1: 1.

the rotor shaft 6 is connected with the inner rings of the front bearing 7 and the rear bearing 8 in an interference fit manner.

The metal casing 1 is an aluminum casing, and the metal front cover 4 and the metal rear cover 5 are both aluminum covers.

Example 2: a dc brushless motor comprising: metal casing 1 and stator 2, rotor core 3 that are located metal casing 1, this rotor core 3 is located stator 2, lid 5 behind metal protecgulum 4 and the metal is installed respectively to terminal surface and the rear end face before metal casing 1, rotor core 3 is fixed in the outside surface of a rotor shaft 6, lid 5 is connected after 6 both ends of rotor shaft pass through fore bearing 7 and rear bearing 8 and metal protecgulum 4 and metal respectively, is located the external screw thread 9 of 4 side surfaces of metal protecgulum and the internal thread 10 swivelling joint of metal casing 1 internal surface, the terminal surface that metal casing 1 is close to lid 5 one side behind the metal is provided with 3 at least riveting point portions 11 along circumference, and this metal casing 1 is connected with lid 5 behind the metal through 3 at least riveting point portions 11.

The rear bearing 8 is located inside the outer end surface of the metal rear cover 5.

The diameter ratio of the length of the metal casing 1 to the metal front cover 4 and the metal rear cover 5 is 1: 0.95.

the metal casing 1 is a copper casing, and the metal front cover 4 and the metal rear cover 5 are both copper covers.

When adopting above-mentioned brushless DC motor, its rotor shaft both ends are connected with lid behind metal protecgulum and the metal through fore bearing and rear bearing respectively, be located the external screw thread of metal protecgulum side surface and the internal thread swivelling joint of metal casing internal surface, the terminal surface that metal casing is close to lid one side behind the metal is provided with 3 at least riveting point portions along circumference, this metal casing is connected with lid behind the metal through 3 at least riveting point portions, when making things convenient for motor assembly and follow-up dismantlement to overhaul, the three constitutes a metal sealed whole, stator and rotor winding electromagnetic flux can strengthen, thereby the power and the efficiency of motor have been improved.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A DC brushless motor, characterized in that: the method comprises the following steps: a metal casing (1), a stator (2) and a rotor core (3) which are positioned in the metal casing (1), wherein the rotor core (3) is positioned in the stator (2), the front end surface and the rear end surface of the metal casing (1) are respectively provided with a metal front cover (4) and a metal rear cover (5), the rotor core (3) is fixed on the outer side surface of a rotor shaft (6), two ends of the rotor shaft (6) are respectively connected with the metal front cover (4) and the metal rear cover (5) through a front bearing (7) and a rear bearing (8), an external thread (9) positioned on the side surface of the metal front cover (4) is rotationally connected with an internal thread (10) on the inner surface of the metal casing (1), the end face of one side, close to the metal rear cover (5), of the metal casing (1) is provided with at least 3 riveting point parts (11) along the circumferential direction, and the metal casing (1) is connected with the metal rear cover (5) through the at least 3 riveting point parts (11).

2. The dc brushless motor of claim 1, wherein: the rear bearing (8) is positioned on the inner side of the outer end face of the metal rear cover (5).

3. The dc brushless motor of claim 1, wherein: the diameter ratio of the length of the metal casing (1) to the metal front cover (4) and the metal rear cover (5) is 1: 0.9 to 1.1.

4. The dc brushless motor of claim 1, wherein: and the rotor shaft (6) is connected with the inner rings of the front bearing (7) and the rear bearing (8) in an interference fit manner.

5. The dc brushless motor of claim 1, wherein: the metal casing (1) is an aluminum casing, and the metal front cover (4) and the metal rear cover (5) are both aluminum covers.