CN105576882A - Low-noise motor - Google Patents

Abstract

The invention discloses a low-noise motor, which comprises a casing, a bottom cover, an end cover, a stator, a rotor, a rotating shaft, a bracket, and an anti-vibration device. The anti-vibration device includes a bottom plate, a first shock-absorbing spring layer, a first rubber layer, a second Two rubber layers, the second shock-absorbing spring layer, the mounting plate arranged on the top of the second shock-absorbing spring layer, an air bag is arranged between the first rubber layer and the second rubber layer, and the shell includes an inner layer, an outer layer, an inner layer and an outer layer. There is a cavity between the outer layers, and the first sound-absorbing cotton is arranged in the cavity; the bottom cover includes a first plate connected to the shell, a second plate connected to the first plate, and multiple A sound-absorbing cavity, the sound-absorbing cavity includes a first cavity and a second cavity, the second cavity is connected to the end of the first cavity away from the first plate, the first cavity is conical, and the second cavity is provided with The second sound-absorbing cotton. The beneficial effect is: small vibration, strong practicability and low noise.

Description

A low noise motor

technical field

The invention relates to a low-noise motor.

Background technique

Motor, commonly known as motor, refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. Its main function is to generate driving torque as a power source for electrical appliances or various machinery. During the operation of the motor, due to the existence of vibration, it is bound to affect the overall performance, which needs to be improved.

In view of this, Chinese patent 201220615463.5 discloses a motor, including a housing, a stator and a rotor are arranged in the housing, and a rotating shaft connected to the rotor, and a shock-absorbing structure is provided at the connection between the stator and the housing; The invention has a simple and exquisite structure, is not easy to be blocked, and has a long service life. However, the vibration of the motor is large and the noise is large.

Contents of the invention

The problem to be solved by the present invention is to provide a low-noise motor with little vibration and strong practicability.

In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a low-noise motor, including a casing, one end of the casing is provided with a bottom cover, and the other end is provided with an end cover, and a stator and a rotor are arranged inside the casing. The rotor is provided with a rotating shaft extending to the outside of the end cover, and the bottom of the housing is provided with a bracket. The first shock-absorbing spring layer on the bottom plate, two first rubber layers and second rubber layers parallel to each other, the second shock-absorbing spring layer arranged on the second rubber layer, the second shock-absorbing spring layer arranged on the second rubber layer The upper mounting plate, an air bag is arranged between the first rubber layer and the second rubber layer, and the mounting plate is fixedly connected with the bracket; the outer shell includes an inner layer and an outer layer, and the inner layer and the outer layer There is a cavity between them, and the first sound-absorbing cotton is arranged in the cavity; the bottom cover includes a first plate connected to the shell, and a second plate connected to the first plate, so A plurality of sound-absorbing cavities are arranged in the second board, and the sound-absorbing chamber includes a first cavity and a second cavity, and the second cavity is connected to the end of the first cavity away from the first board, The first cavity is conical, and its diameter gradually increases from the end close to the first plate to the end close to the second cavity, and the second sound-absorbing cotton is arranged in the second cavity.

Preferably, in the aforementioned low-noise motor, a shock-absorbing pad is provided between the stator and the inner layer, and the shock-absorbing pad is a rubber pad.

Preferably, the above-mentioned low-noise motor, wherein the end cover is provided with a plurality of ventilation holes.

Preferably, in the aforementioned low-noise motor, a first flexible material is provided between adjacent springs of the first shock-absorbing spring layer, and a second flexible material is provided between adjacent springs of the second shock-absorbing spring layer. Material.

Preferably, the above-mentioned low-noise motor, wherein the first flexible material and the second flexible material are sponge materials.

Preferably, the above-mentioned low-noise motor, wherein the bottom plate includes a metal mesh layer and a rubber plate in sequence from top to bottom, and the metal mesh layer is braided by metal wires as warps and wefts.

Preferably, the above-mentioned low-noise motor, wherein the bottom of the rubber plate is evenly provided with anti-skid grid grooves.

Preferably, the above-mentioned low-noise motor, wherein the metal wire is iron wire.

Preferably, the above-mentioned low-noise motor, wherein the rotating shaft is provided with a blowing device, the blowing device includes a hub, and a plurality of fan blade units are arranged in a ring shape on the hub, each of the fan blade units It consists of a plurality of fan blades stacked on each other with increasing lengths in turn, and there is a gap between two adjacent fan blades in the fan blade unit; the end surface of the fan blade away from the hub is provided with a sawtooth structure.

The technical effects of the present invention are mainly reflected in: the shell includes an inner layer and an outer layer, and a first sound-absorbing cotton is arranged between the inner layer and the outer layer, and the first sound-absorbing cotton can absorb noise; the second cavity is provided with a second sound-absorbing cotton, The second sound-absorbing cotton can also absorb noise; by setting the second cavity on the second plate into a conical structure, the sound waves entering the sound-absorbing cavity are not easily reflected out of the sound-absorbing cavity, but are filled inside the sound-absorbing cavity. Second, sound-absorbing cotton absorbs, so that the sound absorption rate is greatly improved; the bottom of the bracket is equipped with an anti-vibration device, which plays a role in reducing vibration; the airbag between the first rubber layer and the second rubber layer is set, and the first shock absorption The arrangement of the spring layer and the second shock-absorbing spring layer can improve the shock-absorbing effect of the anti-vibration device, making the present invention more practical.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a longitudinal sectional view of the housing in Fig. 1;

Fig. 3 is the right view of Fig. 1;

Fig. 4 is the structural representation of blowing device among Fig. 1;

Fig. 5 is a partial enlarged view of place A in Fig. 4;

Fig. 6 is a longitudinal sectional view of the anti-vibration device in Fig. 1;

Fig. 7 is a bottom view of the rubber plate in Fig. 6 .

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figures 1, 2, 3, 4, 5, 6, and 7, a low-noise motor includes a housing 1, one end of the housing 1 is provided with a bottom cover 2, and the other end is provided with an end cover 3, and the housing 1 is provided with The stator 11 and the rotor 12 are provided with a rotating shaft 13 extending to the outside of the end cover 3 on the rotor 12 , and a bracket 4 is provided at the bottom of the housing 1 .

The bottom of the bracket 4 is provided with an anti-vibration device 5, and the anti-vibration device 5 includes a base plate 51, a first damping spring layer 52 arranged on the base plate 51, two first rubber layers 53 and a second rubber layer 54 parallel to each other, The second shock-absorbing spring layer 55 arranged on the second rubber layer 54, the mounting plate 56 arranged on the top of the second shock-absorbing spring layer 55, an air bag 57 is arranged between the first rubber layer 53 and the second rubber layer 54, The mounting plate 56 is fixedly connected with the bracket 4 .

The shell 1 includes an inner layer 14 and an outer layer 15, a cavity is provided between the inner layer 14 and the outer layer 15, and a first sound-absorbing cotton 16 is arranged in the cavity; the bottom cover 2 includes a first board 21 connected to the shell 1 1. The second plate body 22 connected with the first plate body 21, a plurality of sound-absorbing cavities 23 are arranged in the second plate body 22, and the sound-absorbing cavity 23 includes a first cavity body 24, a second cavity body 25, and a second cavity body 25 Connected with the end of the first cavity 24 away from the first plate 21, the first cavity 24 is conical, and the diameter gradually changes from the end close to the first plate 21 to the end close to the second cavity 25. The second cavity 25 is provided with a second sound-absorbing cotton 26 .

The shell 1 in the present invention includes an inner layer 14 and an outer layer 15, and a first sound-absorbing cotton 16 is arranged between the inner layer 14 and the outer layer 15, and the first sound-absorbing cotton 16 can absorb noise; the second cavity 25 is provided with a second Two sound-absorbing cotton 26, the second sound-absorbing cotton 26 can also absorb noise; by setting the second cavity 25 on the second plate body 22 into a conical structure, the sound waves entering the sound-absorbing cavity 23 are not easily reflected out of the sound-absorbing cavity 23, Instead, the second sound-absorbing cotton 26 filled inside the sound-absorbing cavity 23 is absorbed, thereby greatly improving the sound absorption rate; the bottom of the bracket 4 is provided with an anti-vibration device 5, which plays a role in reducing vibration; the first rubber layer 53 The arrangement of the air bag 57 between the second rubber layer 54 and the arrangement of the first shock-absorbing spring layer 52 and the second shock-absorbing spring layer 55 can all improve the shock-absorbing effect of the anti-vibration device 5 .

Wherein, a shock-absorbing pad 17 is arranged between the stator 11 and the inner layer 14, and the shock-absorbing pad 17 is a rubber pad. Shock-absorbing pad 17 can further reduce vibration.

The end cover 3 is provided with a plurality of ventilation holes 31 , and the ventilation holes 31 can improve the ventilation inside the housing 1 .

Wherein the first flexible material 61 is arranged between the adjacent springs of the first shock-absorbing spring layer 52 , and the second flexible material 62 is arranged between the adjacent springs of the second shock-absorbing spring layer 55 . The first flexible material 61 and the second flexible material 62 are sponge materials.

Wherein the bottom plate 51 comprises a metal mesh layer 58 and a rubber plate 59 successively from top to bottom, and the metal mesh layer 58 is braided by metal wires as warps and wefts. Wherein the metal wire is an iron wire. The bottom of the rubber plate 59 is evenly provided with anti-skid grid grooves 60, thereby increasing the frictional force.

Wherein the rotating shaft 13 is provided with a blowing device 8, and the blowing device 8 can blow and dissipate heat to the stator 11 and the rotor 12. The blowing device 8 comprises a hub 81, on which a plurality of fan blade units 82 are annularly arranged, and each fan blade unit 82 is composed of a plurality of fan blades 83 which are stacked on top of each other and whose length increases successively. The fan blade unit 82 There is a gap between two adjacent fan blades 83 ; the end surface of the fan blade 83 away from the hub 81 is provided with a sawtooth structure 84 . The blowing device 8 adopts this multi-layer stepped structure, which effectively reduces the eddy current loss caused by the wind speed difference at the outer edge of the fan blade 83, so that the wind speed difference is evenly generated on the edge of each fan blade 83, and reasonably avoids the ship shock area. Improve the aerodynamic performance of the fan blade 83, so that the fan blade 83 has lower noise, greater flow and higher static pressure at the same speed; the edge of the fan blade 83 is provided with a sawtooth 84 structure, which can also reduce the wind speed difference, thereby Reduce eddy current loss and achieve energy saving.

The above-mentioned embodiments describe preferred implementations of the present invention, but do not limit the concept and scope of the present invention. Under the premise of not departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention shall fall within the scope of protection of the present invention, and the technical content claimed in the present invention has been fully described in the claims.

Claims (9)

1. a low noise motor, comprise shell, one end of described shell is provided with bottom, the other end arranges end cap, stators and rotators is provided with in described shell, described rotor is provided with the rotating shaft extended to outside described end cap, described shell bottom be provided with support, it is characterized in that: the bottom of described support is provided with against shock device, described against shock device comprises base plate, be arranged on the first damping spring layer on described base plate, two pieces of first rubber layers and the second rubber layer be parallel to each other, be arranged on the second damping spring layer on the second rubber layer, be arranged on the mounting panel on the second damping spring layer top, air bag is provided with between described first rubber layer and the second rubber layer, described mounting panel is fixedly connected with described support, described shell comprises internal layer, skin, is provided with cavity between described internal layer and skin, is provided with the first acoustical cotton in described cavity, described bottom comprises the first plate body be connected with described shell, the second plate body be connected with described first plate body, multiple sound absorption cavity is provided with in described second plate body, described sound absorption cavity comprises the first cavity, the second cavity, described second cavity is connected with the termination of described first cavity away from the first plate body, described first cavity is coniform, and become large near the termination of the first plate body gradually to the tip diameter near the second cavity, be provided with the second acoustical cotton in described second cavity.

2. low noise motor according to claim 1, is characterized in that: be provided with beam between described stator and described internal layer, and described beam is rubber blanket.

3. low noise motor according to claim 1, is characterized in that: described end cap is provided with multiple ventilation hole.

4. low noise motor according to claim 1, is characterized in that: be provided with the first flexible material between the spring that described first damping spring layer is adjacent, is provided with the second flexible material between the spring that described second damping spring layer is adjacent.

5. low noise motor according to claim 4, is characterized in that: described first flexible material, the second flexible material are sponge material.

6. low noise motor according to claim 1, is characterized in that: described base plate comprises metal net layer, rubber slab from top to bottom successively, and described metal net layer is worked out as warp and parallel by wire.

7. low noise motor according to claim 6, is characterized in that: described rubber slab bottom even be provided with anti-skidding cell.

8. low noise motor according to claim 6, is characterized in that: described wire is iron wire.

9. low noise motor according to claim 1, it is characterized in that: described rotating shaft is provided with blowing device, described blowing device comprises wheel hub, described wheel hub is placed with multiple blade unit in the form of a ring, the fan leaf composition that each described blade unit increases progressively successively by multiple mutually stacked and length, leaves gap between two fan leafs adjacent in described blade unit; Described fan leaf is provided with broached-tooth design away from the end face of described wheel hub.