CN113489216A

CN113489216A - Low-vibration low-noise direct-current outer rotor brushless motor for laser radar

Info

Publication number: CN113489216A
Application number: CN202110754492.3A
Authority: CN
Inventors: 邵昭文
Original assignee: Shenzhen Jinyuan Electromechanical Technology Co ltd
Current assignee: Shenzhen Jinyuan Electromechanical Technology Co ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-10-08

Abstract

The invention discloses a low-vibration low-noise direct-current outer rotor brushless motor for a laser radar, which comprises an upper bottom plate and a lower bottom plate which are fixedly connected with a shaft, wherein a rotor assembly is arranged between the upper bottom plate and the lower bottom plate, a detachable stator core is arranged on the shaft, an insulating layer and a coil winding are arranged on the stator core, the rotor assembly comprises a rotor shell and a magnetic ring arranged in the rotor shell, and a bearing cavity is arranged in the rotor shell. The structure is reasonable in design, and has the characteristics of stable performance, strong reliability, low noise and small vibration; the concentricity of the two bearing holes is better ensured by adopting the integrated processing of the bearing holes; the O-shaped rubber ring I is used at the joint of the shaft and the bearing, and the O-shaped rubber ring II is used at the surface contact of the bearing and the shaft step, so that the vibration can be greatly reduced; the pre-pressing is carried out by using the axial pre-pressing spring, so that the natural frequency vibration caused by the bearing clearance can be eliminated.

Description

Low-vibration low-noise direct-current outer rotor brushless motor for laser radar

Technical Field

The invention relates to the technical field of automobile laser radar driving, in particular to a low-vibration low-noise direct-current outer rotor brushless motor for a laser radar.

Background

The motor is an electromagnetic device for realizing electric energy conversion or transmission according to an electromagnetic induction law. Its main function is to convert electric energy into mechanical energy. With the continuous improvement of the living standard of people and the change of the intelligentized requirements, the automobile is also closely related to the life of people as a usual vehicle, and the intelligent automobile is also continuously updated to meet the requirements of consumers.

English acronyms for Noise, Vibration and Harshness (Noise, Vibration, Harshness). This is a comprehensive measure of the quality of a vehicle's manufacture and gives the vehicle user the most immediate and surface experience. The NVH problem of vehicles is one of the concerns of various large vehicle manufacturing enterprises and component enterprises in the international automotive industry. Statistics show that 1/3 failure problem of the whole automobile is related to NVH problem of the automobile, and nearly 20% of research and development cost of each large company is consumed for solving the NVH problem of the automobile. A brushless motor having stable characteristics, low noise, low power and small vibration is urgently needed.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a low-vibration low-noise direct-current outer rotor brushless motor for a laser radar.

In order to achieve the purpose of the invention, the invention adopts the technical scheme that:

the utility model provides a direct current external rotor brushless motor of low vibration low noise for laser radar, includes upper plate and lower plate with axle fixed connection, be equipped with the rotor subassembly between upper plate and the lower plate, epaxial detachable stator core that is equipped with, be equipped with insulating layer and coil winding on the stator core, coil winding is connected with the circuit board, the rotor subassembly includes rotor housing, installs the magnetic ring at rotor housing inside, rotor housing is the type structure of dogging, be equipped with the bearing chamber in the rotor housing, install in the bearing chamber with axle complex bearing, be equipped with spacing snap ring between the adjacent bearing, be equipped with O shape circle between bearing and the axle, the inside of rotor housing is equipped with the recess of collecting the grease that splashes, be equipped with pre-compaction spring between upper plate and the rotor housing, the axle passes lower plate, stator core, axle in proper order, The bearing and the rotor shell are connected with the upper base plate through screws.

As the improvement, O shape circle includes O shape rubber circle one and O shape rubber circle two, be equipped with the annular on the circumferencial direction of axle, O shape rubber circle one set establish on the annular and with the interior anchor ring contact of bearing, epaxial step department that is equipped with, O shape rubber circle two sets establish step department and with the terminal surface contact of bearing.

Further, the bearing is a ball bearing.

Further, the bearing is provided with two.

Furthermore, the limiting snap ring is an elastic check ring for a reverse hole.

Further, the insulating layer is an epoxy resin body.

The invention has the beneficial effects that: the structure is reasonable in design, and has the characteristics of stable performance, strong reliability, low noise and small vibration; the concentricity of the two bearing holes is better ensured by adopting the integrated processing of the bearing holes; the O-shaped rubber ring I is used at the joint of the shaft and the bearing, and the O-shaped rubber ring II is used at the surface contact of the bearing and the shaft step, so that the vibration can be greatly reduced; the pre-pressing is carried out by using the axial pre-pressing spring, so that the natural frequency vibration caused by the clearance of the bearing can be eliminated; by adopting the design of the groove at the rotor shell, the splashing of the grease of the bearing running under the high-temperature condition can be greatly reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic illustration of an explosive structure according to the present invention;

FIG. 3 is a perspective view of the present invention;

FIG. 4 is a schematic view of the construction of the shaft of the present invention;

FIG. 5 is a schematic structural diagram of an upper base plate according to the present invention;

reference symbol comparison table:

1. the stator comprises screws, 2, an upper base plate, 3, a pre-pressing spring, 4, a bearing, 5, a limiting clamping ring, 6, a rotor shell, 7, a magnetic ring, 8, a shaft, 9, an O-shaped ring, 9.1, a first O-shaped rubber ring, 9.2, a second O-shaped rubber ring, 10, a stator core, 11, a lower base plate, 12 and a groove.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals.

It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

In order to make the content of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

With the attached drawings, the direct-current outer rotor brushless motor with low vibration and low noise for the laser radar comprises an upper base plate 2 and a lower base plate 11 which are fixedly connected with a shaft 8, a rotor assembly is arranged between the upper base plate 2 and the lower base plate 11, a load is arranged on the rotor assembly, a detachable stator core 10 is arranged on the shaft 8, an insulating layer and a coil winding are arranged on the stator core 10, the insulating layer is an epoxy resin body, and the coil winding is connected with a circuit board,

the rotor assembly comprises a rotor shell 6 and a magnetic ring 7 arranged inside the rotor shell 6, the rotor shell 6 is of a convex structure, a bearing cavity is arranged in the rotor shell 6, a bearing 4 matched with a shaft 8 is arranged in the bearing cavity, the bearing 4 is a ball bearing, two bearings 4 are arranged, a limiting snap ring 5 is arranged between every two adjacent bearings 4, the limiting snap ring 5 is an elastic check ring for a reverse hole, and the limiting snap ring 5 is arranged, so that the first is to ensure the limiting effect of the two bearings during load operation, and the second is to better ensure the concentricity and improve the stability and the reliability of the motor compared with a stepped structure;

an O-shaped ring 9 is arranged between the bearing 4 and the shaft 8, the O-shaped ring 9 comprises a first O-shaped rubber ring 9.1 and a second O-shaped rubber ring 9.2, an annular groove is formed in the circumferential direction of the shaft 8, the first O-shaped rubber ring 9.1 is sleeved on the annular groove and is in contact with the inner annular surface of the bearing 4, a step is formed in the shaft 8, and the second O-shaped rubber ring 9.2 is sleeved on the step and is in contact with the end surface of the bearing 4; the 0-shaped ring is arranged to play a role in vibration reduction and noise reduction;

a groove 12 for collecting splashed grease is arranged in the rotor shell 6, and the groove 12 is used for absorbing lubricating oil of the bearing to prevent splashing;

a pre-pressing spring 3 is arranged between the upper bottom plate 2 and the rotor shell 6, so that natural frequency vibration caused by a bearing gap is eliminated, and the effects of reducing noise and vibration are achieved; the shaft 8 sequentially penetrates through the lower base plate 11, the stator core 10, the bearing 4 and the rotor shell 6 to be connected with the upper base plate 2 through the screws 1, so that axial fixation is completed, and a whole is formed.

This application structural design is reasonable, has stable performance, and the good reliability, the noise is low, vibrates little characteristics.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a laser radar is with low direct current outer rotor brushless motor of low vibration low noise which characterized in that: comprises an upper bottom plate (2) and a lower bottom plate (11) which are fixedly connected with a shaft (8), a rotor assembly is arranged between the upper bottom plate (2) and the lower bottom plate (11), a detachable stator core (10) is arranged on the shaft (8), an insulating layer and a coil winding are arranged on the stator core (10), the coil winding is connected with a circuit board, the rotor assembly comprises a rotor casing (6) and a magnetic ring (7) arranged inside the rotor casing (6), the rotor casing (6) is of a convex structure, a bearing cavity is arranged in the rotor casing (6), a bearing (4) matched with the shaft (8) is arranged in the bearing cavity, a limiting snap ring (5) is arranged between adjacent bearings (4), an O-shaped ring (9) is arranged between the bearing (4) and the shaft (8), a groove (12) for collecting splashed grease is arranged inside the rotor casing (6), be equipped with pre-compaction spring (3) between upper plate (2) and rotor casing (6), axle (8) pass lower plate (11), stator core (10), bearing (4), rotor casing (6) in proper order and are connected with upper plate (2) through screw (1).

2. The low-vibration low-noise direct-current outer rotor brushless motor for the laser radar according to claim 1, characterized in that: o shape circle (9) include O shape rubber circle one (9.1) and O shape rubber circle two (9.2), be equipped with the annular on the circumferencial direction of axle (8), O shape rubber circle one (9.1) cover establish on the annular and with the interior anchor ring contact of bearing (4), be equipped with step department on axle (8), O shape rubber circle two (9.2) cover establish step department and with the end face contact of bearing (4).

3. The low-vibration low-noise direct-current outer rotor brushless motor for the laser radar according to claim 1, characterized in that: the bearing (4) is a ball bearing.

4. The low-vibration low-noise direct-current outer rotor brushless motor for the laser radar according to claim 1, characterized in that: the number of the bearings (4) is two.

5. The low-vibration low-noise direct-current outer rotor brushless motor for the laser radar according to claim 1, characterized in that: the limiting snap ring (5) is an elastic check ring for a reverse hole.

6. The low-vibration low-noise direct-current outer rotor brushless motor for the laser radar according to claim 1, characterized in that: the insulating layer is an epoxy resin body.