CN218216858U

CN218216858U - Novel motor structure

Info

Publication number: CN218216858U
Application number: CN202222403435.3U
Authority: CN
Inventors: 杨旭
Original assignee: Shenzhen Junyue Electronics Co ltd
Current assignee: Shenzhen Junyue Electronics Co ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2023-01-03
Anticipated expiration: 2032-09-09

Abstract

A novel motor structure solves the technical defects that an outer rotor motor is inconvenient to install and use, an inner rotor motor is weak in carrying capacity, high in production cost and poor in heat dissipation performance; comprises a motor rotor, a motor stator and a crankshaft; the device also comprises a shell and a shell bottom cover; the outer shell is sleeved outside the motor rotor and is in clearance fit with the motor rotor; the shell bottom cover is matched and fixedly connected with the shell opening; the output end of the crankshaft extends outside the shell, and the crankshaft is movably connected with the shell; and the motor stator is fixedly connected with the bottom cover of the shell. The motor rotor is covered in the shell in a clearance fit mode, and the motor stator in the motor rotor of the shell is fixed, so that the traditional outer rotor motor has the advantages of an inner rotor motor, the advantages of the outer rotor motor and the advantages of the inner rotor motor are integrated, the defects of two products are avoided, and the purposes of saving energy, reducing emission, optimizing production efficiency and reducing production cost are achieved by utilizing the advantages of the outer rotor motor and the inner rotor motor to the maximum.

Description

Novel motor structure

Technical Field

The utility model relates to a direct current motor field.

Background

The existing direct current motors are classified according to the position relation of a motor rotor and a motor stator, and comprise an outer rotor motor and an inner rotor motor; these two types of machines have very wide applications in different fields, and the advantages and disadvantages of both types of machines are evident, among them:

the external rotor motor has the advantages that: the power density is higher, the heat dissipation is good, the structure is simple, the motor rotor can generate larger torque at low speed, the rotational inertia is large, and the stable-speed operation is facilitated; the outer rotor motor has the advantages that the notch is arranged outside, the requirement on winding equipment is low, and the production efficiency is higher in winding production; such as radiator fan motors and hub motors. The outer rotor motor has the following defects: because the motor rotor is outside, the rotor interference during installation and use needs to consider other additional conditions and devices during product design so as to facilitate the installation and safety of the product.

The advantages of the inner rotor motor are as follows: the motor rotor is internally arranged, so that the external structure cannot be interfered; the compact space can be used for placing products to facilitate the design of the products, other devices are not needed to be added to avoid the interference on the structure, and the device is mainly applied to the driving of various mechanical structures at present. Disadvantages of the inner rotor motor: the inner rotor groove opening is arranged inside, internal winding is needed, requirements for winding equipment are higher, winding efficiency is low due to limited space, and production cost is higher. The rotor inertia, the output torque and the output power factor density of the inner rotor are smaller than those of an outer rotor motor with the same power and volume, and the load capacity is weaker. The inner rotor has poor heat dissipation under a closed condition, and the permanent magnet of the rotor is easily damaged due to high temperature.

SUMMERY OF THE UTILITY MODEL

To sum up, the utility model discloses an aim at solves external rotor electric machine and has the installation and use inconvenience, and internal rotor electric machine load-carrying capacity is weaker, and manufacturing cost is higher, and the relatively poor technique of thermal diffusivity is not enough, and provides a novel motor structure.

For solving the utility model provides a technique is not enough, and the technical scheme of adoption is:

a novel motor structure comprises a motor rotor, a motor stator and a motor shaft; the motor rotor is arranged outside the motor stator; the motor shaft is fixedly connected with the motor rotor and penetrates through the center of the motor stator; the method is characterized in that: the device also comprises a shell and a shell bottom cover; the outer shell is sleeved outside the motor rotor and is in clearance fit with the motor rotor; the shell bottom cover is matched and fixedly connected with the shell opening; the output end of the crankshaft extends outside the shell, and the crankshaft is movably connected with the shell; the motor stator is fixedly connected with the bottom cover of the shell.

As to the utility model discloses make technical characteristics who further restricts including:

the crankshaft is movably connected with the shell through a shell bearing; the crankshaft is movably connected with the bottom cover of the shell through a bottom cover bearing.

And a stator core bearing or a stator core bushing is arranged between the inner cavity of the motor stator and the crankshaft.

And a motor control panel is fixedly arranged on the inner side surface of the shell bottom cover.

The motor rotor comprises a cylindrical rotor support with one closed end, the end face of the rotor support is fixedly connected with a motor shaft, and a magnetic ring is fixedly mounted on the inner wall of the rotor support; the motor stator comprises a stator core and a winding wound on the stator core.

And an opening for a circuit of the motor control panel to pass through is formed in the bottom cover of the shell.

Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model discloses increase shell and shell bottom on the basis of traditional external rotor electric machine's structure principle, cover motor rotor clearance fit ground in the shell, motor stator in the shell motor rotor is fixed mutually, makes traditional external rotor electric machine have inner rotor electric machine's advantage, synthesizes the advantage of two kinds of motors of external rotor electric machine and inner rotor electric machine, avoids the shortcoming of two kinds of products, and the maximize utilizes both advantages to reach energy saving and emission reduction, optimize production efficiency, reduction in production cost's purpose.

Drawings

Fig. 1 is a first schematic diagram of a novel motor structure provided by the present invention;

fig. 2 is a schematic diagram ii of a novel motor structure provided by the present invention;

fig. 3 is an exploded view of the novel motor structure provided by the present invention.

Detailed Description

The structure of the present invention will be further described with reference to the drawings and the preferred embodiments provided by the present invention.

Referring to fig. 1 to 3, the present invention provides a novel motor structure, which includes a motor rotor, a motor stator 12 and a crankshaft 11; the motor rotor is arranged outside the motor stator 12; the machine shaft 11 is fixedly connected with the motor rotor and penetrates through the center of the motor stator 12; the motor rotor comprises a cylindrical rotor support 15 with one closed end, the end face of the rotor support 15 is fixedly connected with the machine shaft 11, and a magnetic ring 14 made of a permanent magnet material is fixedly arranged on the inner wall of the rotor support 15; the motor stator 12 includes a stator core and a winding wound on the stator core. That is, the motor rotor, the motor stator 12 and the crankshaft 11 form a structure similar to a conventional external rotor motor.

In order to overcome the problem that the motor rotor is outside, and other additional structures are needed to be added when the product is designed due to the interference of the motor rotor during installation and use, so that the installation and the safety of the product are convenient, the utility model also comprises a shell 21 and a shell bottom cover 22; the shell 21 is sleeved outside the motor rotor and is in clearance fit with the motor rotor; the shell bottom cover 22 is matched and fixedly connected with the opening of the shell 21; the output end of the crankshaft 11 extends outside the shell 21, and the crankshaft 11 is movably connected with the shell; the motor stator 12 is fixedly connected with the shell bottom cover 22. That is also the motor stator in shell 21 and electric motor rotor is fixed mutually, makes the utility model has the advantages of the shell structure that has of inner rotor motor, two kinds of motors of outer rotor motor and inner rotor motor avoid the shortcoming of two kinds of products.

In a specific implementation process, in order to reduce the friction force between the crankshaft 11 and the outer casing 21 and the outer casing bottom cover 22, the crankshaft 11 and the outer casing 21 are movably connected through the outer casing bearing 202, and the outer casing bearing 202 can be arranged in the end surface central shaft sleeve 211 of the outer casing 21; the crankshaft 11 is movably connected with the housing bottom cover 22 through a bottom cover bearing 222, the bottom cover bearing 222 can be arranged in a bearing seat 201 on the housing bottom cover 22, and the housing bottom cover 22 can be provided with a through hole for the crankshaft 11 to extend out, or can adopt a closed structure.

In order to enhance the supporting strength of the crankshaft 11, a stator core bearing 13 or a stator core bushing is arranged between the inner cavity of the motor stator 12 and the crankshaft 11, and the crankshaft 11 is prevented from bending and deforming by the stator core bearing 13.

In the specific implementation process, the motor control board 16 where the control circuit for controlling the operation and the running state of the motor is located can be fixedly installed on the inner side surface of the shell bottom cover 22, and the motor control board 16 can be integrally protected by the matching and sealing of the shell 21 and the shell bottom cover 22.

In order to facilitate the leading-out of the cable on the motor control board 16, the housing bottom cover 22 is provided with an opening 221 for passing the line of the motor control board 16.

The utility model has the advantages of the outer rotor motor and the inner rotor motor, the shapes of the shell 21 and the shell bottom cover 22 can be composed of various forms, and are not limited to a certain specific shape; the shell can not interfere with the peripheral structure of a product, the installation is convenient, the safety is improved, larger torque can be generated at low speed, the rotational inertia is large, the stable-speed operation is facilitated, the energy is saved, the emission is reduced, the production efficiency is optimized, and the production cost is reduced.

To sum up, the technical scheme of the utility model can be fully effectual the above-mentioned utility model purpose of realization, just the utility model discloses a structure and functional principle all obtain abundant verification in the embodiment, can reach anticipated efficiency and purpose, do not deviating from the utility model discloses a under the prerequisite of principle and essence, can make multiple change or modification to the embodiment of utility model. Therefore, the present invention includes all the alternative contents within the scope mentioned in the claims, and all the equivalent changes made within the claims of the present invention belong to the claims of the present application.

Claims

1. A novel motor structure comprises a motor rotor, a motor stator and a motor shaft; the motor rotor is arranged outside the motor stator; the machine shaft is fixedly connected with the motor rotor and penetrates through the center of the motor stator; the method is characterized in that: the device also comprises a shell and a shell bottom cover; the outer shell is sleeved outside the motor rotor and is in clearance fit with the motor rotor; the shell bottom cover is matched and fixedly connected with the shell opening; the output end of the crankshaft extends outside the shell, and the crankshaft is movably connected with the shell; the motor stator is fixedly connected with the bottom cover of the shell.

2. The novel electric machine structure of claim 1, characterized in that: the crankshaft is movably connected with the shell through a shell bearing; the crankshaft is movably connected with the bottom cover of the shell through a bottom cover bearing.

3. The novel electric machine structure of claim 2, characterized in that: and a stator core bearing or a stator core bushing is arranged between the inner cavity of the motor stator and the crankshaft.

4. The novel electric machine structure of claim 1, characterized in that: and a motor control panel is fixedly arranged on the inner side surface of the shell bottom cover.

5. The new machine structure of claim 1, characterized in that: the motor rotor comprises a cylindrical rotor support with one closed end, the end face of the rotor support is fixedly connected with a motor shaft, and a magnetic ring is fixedly arranged on the inner wall of the rotor support; the motor stator comprises a stator core and a winding wound on the stator core.

6. The novel electric machine structure of claim 4, characterized in that: and an opening for a circuit of the motor control panel to pass through is formed in the bottom cover of the shell.