CN211791072U

CN211791072U - Low-noise blower motor

Info

Publication number: CN211791072U
Application number: CN202020663201.0U
Authority: CN
Inventors: 戴淋彬; 戴乃品; 张坤
Original assignee: ZHEJIANG JUGUANG AUTOMOBILE PARTS CO LTD
Current assignee: ZHEJIANG JUGUANG AUTOMOBILE PARTS CO LTD
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-10-27
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses a low noise air-blower motor has carbon brush and brush yoke, and on the brush yoke was located to the carbon brush mobile, the brush yoke was installed in motor housing, its characterized in that: the two carbon brushes are staggered by 180 degrees and arranged around a motor commutator arranged on a motor shaft, and the installation center of the carbon brush is offset from the center of the motor commutator; the motor shell is elastically held by the inner plastic shell, and the inner plastic shell is elastically held by the outer plastic shell. The utility model has the advantages of low noise and good vibration damping effect.

Description

Low-noise blower motor

Technical Field

The utility model relates to a car air-blower assembly, concretely relates to motor of car air-blower assembly.

Background

The automobile blower assembly is mainly applied to an automobile air conditioning system and has the function of blowing cold air on an air conditioning evaporation box or hot air in a warm water tank into an automobile. The main component of the automobile blower assembly is a blower motor, the installation center of a carbon brush of the blower motor in the prior art is aligned with the center of a motor commutator in a right-to-left mode, and a gap in the left-to-right direction is formed between the carbon brush and a brush box in the brush box, so that the carbon brush cannot avoid shaking left and right when the motor works, and the larger the shaking amount is, the larger the noise of the motor is; in addition, when the motor shell is installed, an ideal vibration reduction measure is not taken, the vibration of the motor during working is also large, the shaking degree of the carbon brush can be further influenced, and the vibration can generate adverse effects on the working of the automobile air conditioning system.

Disclosure of Invention

The utility model aims at providing a low noise air-blower motor with low noise, effectual advantage of damping.

The utility model adopts the following technical proposal to complete:

low noise air-blower motor has carbon brush and brush yoke, and on the brush yoke was located to the carbon brush mobile, the brush yoke was installed in motor housing, its characterized in that: the two carbon brushes are staggered by 180 degrees and arranged around the motor commutator arranged on the motor shaft, and the installation center of the carbon brush is offset from the center of the motor commutator.

The motor shell is elastically held by the inner plastic shell, and the inner plastic shell is elastically held by the outer plastic shell.

According to the blower motor in the technical scheme, firstly, the installation center of the carbon brush is offset from the center of the motor commutator, so that the motor commutator can generate a side thrust towards one direction to the carbon brush when the motor runs, the carbon brush cannot shake left and right during working, and the working noise of the motor is effectively reduced; and secondly, the motor shell is supported by the inner plastic shell and the outer plastic shell, and elastic vibration damping structures are arranged between the inner plastic shell and the motor shell and between the inner plastic shell and the outer plastic shell, so that the vibration generated during the operation of the motor can be effectively avoided, and the blower motor has the advantages of low noise and good vibration damping effect.

Preferably, the inner-layer plastic shell is divided into an upper half body and a lower half body, the upper half body and the lower half body are connected in a buckling mode, the upper half body and the lower half body are provided with a left lug and a right lug on a joint surface, the lugs are provided with lug holes, rubber sleeves are formed in the lug holes in a secondary injection molding mode, positioning insertion holes are formed in the middles of the rubber sleeves, the upper half body and the lower half body are provided with a plurality of rubber strips along the outer surfaces of the upper half body and the lower half body, the rubber strips are; the outer plastic shell is divided into an upper half ring and a lower half ring, the upper half ring and the lower half ring are connected in a screw fastening mode, the upper half ring corresponds to the positioning insertion hole, the positioning insertion rod is arranged at the position of the positioning insertion hole, the positioning insertion rod is inserted into the positioning insertion hole, the lower half ring corresponds to the positioning insertion hole, and the screw penetrates through the screw hole from bottom to top to be screwed and fixed in a central rod hole formed in the positioning insertion rod.

The design can ensure that the inner and outer plastic shells are positioned and fixed on the premise of complete elastic contact, thereby realizing double-layer vibration damping support of the inner and outer plastic shells to the motor shell with simple process and reasonable structure.

Drawings

The utility model discloses there is following figure:

fig. 1 is a rear end view in the direction of the rear end face of the present invention;

fig. 2 is an installation view of the carbon brush in the inside of fig. 1,

figure 3 is a perspective view of the inner and outer plastic shells of figure 1,

figure 4 is a partial cross-sectional view of figure 3,

figure 5 is a block diagram of the single outer plastic shell of figure 3,

figure 6 is a block diagram of the single inner plastic shell of figure 3,

fig. 7 is a partial cross-sectional view of fig. 6.

Detailed Description

As shown in the figures, the low-noise blower motor of the present invention has a carbon brush 23 and a brush holder 21, the carbon brush 23 is movably disposed in a brush box 22 mounted on the brush holder 21, the brush holder 21 is elastically connected to the motor housing 5, the two carbon brushes 23 are staggered by 180 degrees and arranged around a motor commutator 24 mounted on the motor shaft 9, the mounting center of the carbon brush 23 is offset from the center of the motor commutator 24, the motor housing 5 is elastically held tightly by an inner plastic shell, and the inner plastic shell is elastically held tightly by an outer plastic shell; the inner layer plastic shell adopts an upper half body and a lower half body which are split, the upper half body 3 and the lower half body 4 are connected in a buckling mode, the upper half body 3 is provided with a buckle 20, the lower half body 4 is provided with a buckle groove 19, the upper half body and the lower half body are provided with a left lug and a right lug 10 on a joint surface, the lugs 10 are provided with lug holes 14, rubber sleeves 11 are formed in the lug holes 14 in a secondary injection molding mode, the upper end and the lower end of each rubber sleeve 11 are higher than the end surfaces of the lug holes 14, a positioning insertion hole 18 is formed in the middle of each rubber sleeve 11, two rubber strips 17 are respectively arranged on the outer surfaces of the upper half body 3 and the lower half body 4 along the outer surfaces of the upper half body and the lower half body, the; outer plastic casing adopts upper and lower semi-ring to run from opposite directions, goes up and connects through the screw fastening mode between semi-ring 1 and the lower semi-ring 2, goes up semi-ring 1 and is being corresponded the position of location jack 18 is equipped with location inserted bar 15, and location inserted bar 15 inserts in location jack 18, and lower semi-ring 2 is corresponding the below position of location jack 18 is equipped with screw hole 16, the screw is from up screwing up after passing screw hole 16 and fixing in the central pole hole 13 that location inserted bar 15 was equipped with down.

Claims

1. Low noise air-blower motor has carbon brush and brush yoke, and on the brush yoke was located to the carbon brush mobile, the brush yoke was installed in motor housing, its characterized in that: the two carbon brushes are staggered by 180 degrees and arranged around the motor commutator arranged on the motor shaft, and the installation center of the carbon brush is offset from the center of the motor commutator.

2. The low noise blower motor according to claim 1, wherein: the motor shell is elastically held by the inner plastic shell, and the inner plastic shell is elastically held by the outer plastic shell.

3. The low noise blower motor according to claim 2, wherein: the inner layer plastic shell adopts an upper half body and a lower half body which are split, the upper half body and the lower half body are connected in a buckling mode, the upper half body and the lower half body are provided with a left lug and a right lug on a joint surface, the lugs are provided with lug holes, rubber sleeves are formed in the lug holes in a secondary injection molding mode, positioning insertion holes are formed in the middles of the rubber sleeves, the upper half body and the lower half body are provided with a plurality of rubber strips along the outer surfaces of the upper half body and the lower half body, the rubber strips; the outer plastic shell is divided into an upper half ring and a lower half ring, the upper half ring and the lower half ring are connected in a screw fastening mode, the upper half ring corresponds to the positioning insertion hole, the positioning insertion rod is arranged at the position of the positioning insertion hole, the positioning insertion rod is inserted into the positioning insertion hole, the lower half ring corresponds to the positioning insertion hole, and the screw penetrates through the screw hole from bottom to top to be screwed and fixed in a central rod hole formed in the positioning insertion rod.