CN215817778U

CN215817778U - Novel low-noise motor structure

Info

Publication number: CN215817778U
Application number: CN202121740729.4U
Authority: CN
Inventors: 杨源欣; 陈洪飞
Original assignee: Ningbo Hujiang Electric Motor Co ltd
Current assignee: Ningbo Hujiang Electric Motor Co ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2022-02-11
Anticipated expiration: 2031-07-28

Abstract

The utility model relates to the field of motors, in particular to a novel low-noise motor structure which comprises a motor body, wherein the motor body is provided with a base, a front end cover, a rear end cover and a rotating shaft, the front end cover and the rear end cover are respectively and fixedly arranged at two ends of the base, a stator is fixedly arranged on the inner wall of the base, the rotating shaft is movably arranged in the base, and the novel low-noise motor structure also comprises two noise reduction systems sleeved at two ends of the rotating shaft, and compared with the prior art, the novel low-noise motor structure has the beneficial effects that: firstly, the oil-containing bearing is designed, so that vibration absorption and noise reduction can be realized, and lubricating oil is not required to be added when the motor is frequently disassembled and assembled, so that not only can noise be reduced, but also labor hour can be reduced, and the working efficiency can be improved; secondly, the noise generated by mechanical rotation is reduced by wrapping the sound-absorbing cotton at the joint of the oil-containing bearing and the rotating shaft.

Description

Novel low-noise motor structure

Technical Field

The utility model relates to the field of motors, in particular to a novel low-noise motor structure.

Background

The motor noise classification is divided into three categories: electromagnetic noise, mechanical noise, aerodynamic noise, etc. Electromagnetic noise is a kind of low frequency noise generated by the magnetic field pulsation in the motor gap, which causes the vibration of the stator, rotor and whole motor structure, and its magnitude depends on the electromagnetic load and the design parameters of the motor. Electromagnetic noise is mainly structural noise, and is divided into: the main reasons for constant electromagnetic noise, load-related magnetic noise, etc. are due to improper fit of stator and rotor slots, stator and rotor eccentricity or too small air gap, inconsistent length, etc. Mechanical noise is noise created by friction, impact, imbalance and structural resonances of the running parts of the machine. The noise caused by mechanical causes is of many kinds and also complex. The noise sources are mainly: self noise source, load induction noise source and mechanical noise source of auxiliary parts. The problems of processing technology, processing precision, assembly quality and the like are solved. Typically by brushes and commutators, bearings, rotors, ventilation systems, etc. The aerodynamic noise is mainly generated by the rotation of the fan, which causes the air to flow, impact and rub, and the noise depends on the size and shape of the fan, the rotating speed of the motor, the wind resistance and the like.

In the use of motor, the pivot of motor and bearing department can produce the noise, and its leading cause has:

firstly, the lubricating oil in the bearing is less, and the lubricating oil needs to be added, but the motor needs to be disassembled and assembled due to frequent replacement of the lubricating oil, so that the matching tolerance of parts in the motor is out of tolerance, and the parts are loosened, so that other noises are generated;

secondly, the joint of the rotating shaft and the bearing generates noise due to mechanical rotation.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, a novel low-noise motor structure is provided.

In order to achieve the above purposes, the technical scheme adopted by the utility model is as follows:

the utility model provides a novel low noise motor structure, includes motor body, motor body has frame, front end housing, rear end cap and pivot, front end housing and rear end cap are fixed respectively and set up in the both ends of frame, the stator is fixed to be set up on the frame inner wall, the pivot activity sets up in the frame, still locates two noise reduction systems at pivot both ends including the cover.

Further, the noise reduction system includes:

the bearing mounting seat is fixedly arranged on one side, close to the rear end cover, of the front end cover, and a circular mounting groove is formed in the bearing mounting seat;

the oil-retaining bearing is fixedly arranged in the circular mounting groove of the bearing mounting seat and sleeved on the rotating shaft;

and the end cover is arranged on the open side of the circular mounting groove of the bearing mounting seat and is fixedly connected with the bearing mounting seat.

Further, set up the annular holding tank in the bearing mount pad, annular holding tank and circular mount pad coaxial line, and the internal diameter of annular holding tank is greater than the external diameter of oiliness bearing, annular holding tank intussuseption is filled with the sound of inhaling that is used for the noise reduction cotton.

Furthermore, the inner wall of one end of the oil-containing bearing close to the front end cover is of a slope structure which is convenient for the insertion of the rotating shaft.

Furthermore, a circular bulge is formed on the outer surface of the front end cover, the central axis of the circular bulge is parallel to the central axis of the rotating shaft, and a plurality of threaded holes and two pin holes are formed in the circular bulge.

Furthermore, the outer end of each pin hole is provided with a plug pin plug.

Furthermore, a rubber ring for damping and reducing noise is arranged between the front end cover and the bearing mounting seat.

Compared with the prior art, the utility model has the beneficial effects that:

firstly, the oil-containing bearing is designed, so that vibration absorption and noise reduction can be realized, and lubricating oil is not required to be added when the motor is frequently disassembled and assembled, so that not only can noise be reduced, but also labor hour can be reduced, and the working efficiency can be improved;

secondly, the noise generated by mechanical rotation is reduced by wrapping the sound-absorbing cotton at the joint of the oil-containing bearing and the rotating shaft.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a projection view of the present invention;

FIG. 3 is a cross-sectional view taken along section A-A of FIG. 2;

FIG. 4 is an enlarged view of FIG. 3 at B;

FIG. 5 is an enlarged view of FIG. 3 at C;

FIG. 6 is a schematic perspective view of a bearing mount;

fig. 7 is a perspective view of the end cap.

The reference numbers in the figures are:

1-a machine base; 2-front end cover; 3-rear end cap; 4-a rotating shaft; 5-a bearing mounting seat; 6-circular mounting groove; 7-oil-impregnated bearings; 8-end cap; 9-an annular accommodating groove; 10-circular protrusion; 11-plug screw pin plug; 12-rubber ring.

Detailed Description

The following description is presented to disclose the utility model so as to enable any person skilled in the art to practice the utility model. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

Referring to fig. 1 to 7, a novel low-noise motor structure, including motor body, motor body has frame 1, front end housing 2, rear end housing 3 and pivot 4, front end housing 2 and rear end housing 3 are fixed respectively and are set up in the both ends of frame 1, the stator is fixed to be set up on frame 1 inner wall, pivot 4 activity sets up in frame 1, still locates two noise reduction systems at 4 both ends of pivot including the cover.

The motor body mainly includes: the bearing that the cover was established on frame 1, front end housing 2, rear end housing 3, pivot 4, rotor winding, stator and pivot 4, a novel low noise motor structure, in fact improve the bearing, because the motor during operation can locate and long-time, high rotational speed operating condition, can produce various noises, wherein the noise includes electromagnetic noise, mechanical noise, aerodynamic noise etc. the utility model discloses the noise that mainly produces to the bearing among the mechanical noise falls the processing of making an uproar.

The noise reduction system includes:

the bearing mounting seat 5 is fixedly arranged on one side, close to the rear end cover 3, of the front end cover 2, and a circular mounting groove 6 is formed in the bearing mounting seat 5;

the oil-retaining bearing 7 is fixedly arranged in the circular mounting groove 6 of the bearing mounting seat 5, and the oil-retaining bearing 7 is sleeved on the rotating shaft 4;

and the end cover 8 is arranged on the open side of the circular mounting groove 6 of the bearing mounting seat 5 and is fixedly connected with the bearing mounting seat 5.

In a general motor, most bearings are roller bearings or other bearings needing lubricating oil, the motor needs to be frequently disassembled along with the long-time work of the motor, the lubricating oil is added to the bearings, otherwise, a large amount of noise is generated at the connecting part of the rotating shaft 4 and the bearings, the disassembling is troublesome, the shutdown is caused, the labor hour is delayed, in addition, the motor is frequently disassembled, the fit clearance between parts is enlarged, the fit tolerance is exceeded, and the noise is also generated, so the oil-containing bearing 7, namely the oil-containing bearing 7 manufactured by adopting a powder metallurgy mode has good guide sliding performance due to the material characteristics, the lubricating oil does not need to be added, and compared with the general bearing, the oil-containing bearing 7 manufactured by adopting the powder metallurgy mode has the advantages of low cost, vibration absorption, small noise, high efficiency, heavy load and the like;

annular holding tank 9 has been seted up in bearing mount pad 5, annular holding tank 9 and circular mount pad coaxial line, and the internal diameter of annular holding tank 9 is greater than the external diameter of oiliness bearing 7, annular holding tank 9 intussuseption is filled with the sound of inhaling that is used for the noise reduction cotton.

During the installation, at first pack into bearing mount pad 5's circular mounting groove 6 with oiliness bearing 7 in, then, it is cotton to fill in inhaling the sound in annular holding tank 9, it is high to inhale the sound cotton has the sound absorption rate, sound insulation performance is good, the heat-proof quality is good, and inhale the sound cotton and be the environmental protection product, recycle, it still has firmly to inhale the sound cotton, good use tastelessly, waterproof, dampproofing, air permeability is good, very easily processing, can make various shapes and advantages such as long service life according to different needs, inhale the cotton back of filling of sound, it is fixed with end cover 8 and bearing mount pad 5.

The inner wall of one end of the oil-retaining bearing 7 close to the front end cover 2 is of a slope structure which is convenient for the insertion of the rotating shaft 4. When the motor is assembled, the rotating shaft 4 can penetrate through the oil-containing bearing 7 relatively quickly, and the inner wall of one end of the oil-containing bearing 7 is machined into a bevel structure, namely, the inner wall is machined to be chamfered.

A circular protrusion 10 is formed on the outer surface of the front end cover 2, the central axis of the circular protrusion 10 is parallel to the central axis of the rotating shaft 4, and a plurality of threaded holes and two pin holes are machined in the circular protrusion 10.

Because the assembly precision of the oil-retaining bearing 7 has certain requirements, the situation that the oil-retaining bearing 7 is replaced in the long-time and high-rotation-speed use process of the motor is considered to be inevitable, the front end cover 2, the rear end cover 3 and the bearing mounting seat 5 need to be fixed through screws and also need to be precisely positioned through pins, the time for replacing the oil-retaining bearing 7 can be greatly reduced by designing pin holes, and the principles of 'standard unification' and 'standard superposition' in assembly are met.

The outer end of each pin hole is provided with a plug 11. Because the motor can produce the vibration long-term, the in-process of high rotational speed, the pin can produce not hard up or even drop under the condition of long-term vibration, so need design the round pin stifled at the tip of pin, common round pin is stifled for jump ring and two kinds of forms of plug screw, and the plug screw is compared in the more problem of jump ring, so this practicality adopts plug screw round pin stifled 11 in the outer end of pinhole.

And a rubber ring 12 for shock absorption and noise reduction is arranged between the front end cover 2 and the bearing mounting seat 5. This practicality is installed two noise reduction systems respectively on front end housing 2 and rear end housing 3, and it influences to noise reduction system to produce vibration in order to reduce motor man-hour, so sets up rubber circle 12 in two noise reduction systems and front end housing 2 and rear end housing 3's junction, sets up the through-hole that a plurality of supplied screw and pin passed on rubber circle 12.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the utility model, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a novel low noise motor structure, includes motor body, motor body has frame (1), front end housing (2), rear end cap (3) and pivot (4), front end housing (2) and rear end cap (3) are fixed respectively and are set up in the both ends of frame (1), the stator is fixed to be set up on frame (1) inner wall, pivot (4) activity sets up in frame (1), its characterized in that still locates two noise reduction systems at pivot (4) both ends including the cover.

2. A novel low noise motor construction, according to claim 1, characterized in that said noise reduction system comprises:

the bearing mounting seat (5) is fixedly arranged on one side, close to the rear end cover (3), of the front end cover (2), and a circular mounting groove (6) is formed in the bearing mounting seat (5);

the oil-retaining bearing (7) is fixedly arranged in the circular mounting groove (6) of the bearing mounting seat (5), and the oil-retaining bearing (7) is sleeved on the rotating shaft (4);

and the end cover (8) is arranged on the open side of the circular mounting groove (6) of the bearing mounting seat (5) and is fixedly connected with the bearing mounting seat (5).

3. A novel low-noise motor structure according to claim 2, characterized in that an annular accommodating groove (9) is formed in the bearing mounting seat (5), the annular accommodating groove (9) is coaxial with the circular mounting seat, the inner diameter of the annular accommodating groove (9) is larger than the outer diameter of the oil-containing bearing (7), and the annular accommodating groove (9) is filled with sound-absorbing cotton for reducing noise.

4. A novel low-noise motor structure according to claim 2, characterized in that the inner wall of the end of the oil-retaining bearing (7) close to the front end cover (2) is a slope structure for facilitating the insertion of the rotating shaft (4).

5. The novel low-noise motor structure according to claim 2, wherein a circular protrusion (10) is formed on the outer surface of the front end cover (2), the central axis of the circular protrusion (10) is parallel to the central axis of the rotating shaft (4), and a plurality of threaded holes and two pin holes are formed in the circular protrusion (10).

6. A new type of low noise motor structure according to claim 5, characterized in that the outer end of each pin hole is provided with a plug pin plug (11).

7. A new type of low noise motor structure according to claim 2, characterized in that a rubber ring (12) for shock absorption and noise reduction is provided between the front end cover (2) and the bearing mounting seat (5).