CN100380753C

CN100380753C - Brush assembly unit of dynamo for vacuum cleaner

Info

Publication number: CN100380753C
Application number: CNB031443478A
Authority: CN
Inventors: 朴俊植
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2003-09-25
Filing date: 2003-09-25
Publication date: 2008-04-09
Anticipated expiration: 2023-09-25
Also published as: CN1601829A

Abstract

The present invention relates to an electric brush assembly body for a motor of a vacuum cleaner, which comprises a fixer, an electric brush support, an electric brush and a spring, wherein the fixer is fixed at one side of a motor casing, and the electric brush support is combined on the motor casing in a penetrating mode; the electric brush is contained inside the electric brush support in a drawable mode; the spring elastically pressurizes the electric brush to enable one end of the electric brush to contact at one side of a commutator in a frictional mode. The present invention is characterized in that a spring pressurizing surface is formed in the electric brush, the spring pressurizing surface has a certain oblique angle, and the spring pressurizing surface is obliquely formed in the rotary direction of the commutator. The present invention can prevent the end of the electric brush contacting one side of the commutator in a frictional mode from generating commutation sparks, and the reliability of products can be improved.

Description

The brush assembly of motor for vacuum cleaner

Technical field

The present invention relates to motor for vacuum cleaner, relate in particular to its brush assembly.

Background technology

Below with reference to back accompanying drawing paper, the brush assembly of existing motor for vacuum cleaner is described.

As shown in Figure 1, existing motor for vacuum cleaner 11 comprises: motor case 10, stator 30, link head TAP, rotor 40, rotating shaft 41, commutator 50, impeller 70, impeller cover (COVER) and brush assembly 60.

Above-mentioned motor case 10 is the open cylindrical shapes of a side; Stator 30 is pressed on the inner peripheral surface that is fixed on motor case 10; The lead-out wire that link head is used for being wrapped in the coil on the stator 30 is attached at terminal (TERMINAL); Rotor 40 rotatably is inserted in the inboard of stator 30; Rotating shaft 41 runs through the center that is combined in rotor 40, with rotor 40 interlocks; Commutator 50 is pressed on the axis of rotating shaft 41 and is fixed on rotor 40 1 sides, and the while can impose on electric current the coil in each groove (SLOT) that is wrapped in rotor and link; Impeller 70 is fixed on relative rotating shaft 41 1 ends of commutator 50; It is open distolateral that impeller cover 20 is combined in casing 10, is used to accommodate impeller 70; Brush assembly 60 runs through casing 10, and sliding surface is contacted in casing 10 inner commutator 50 1 sides, applies electric current.

As shown in Figure 2, brush assembly 60 comprises: brush 63, brush carriage 62, lead 65, helical spring 64 and fixture 61.

The brush 63 of above-mentioned elasticity ear of maize shape has the square cross-section shape; Brush carriage 62 can be accommodated brush 63 with pulling out; Lead 65 links brush 63 and brush carriage 62, makes brush 63 and brush carriage 62 energisings, limits the distance of pulling out of brush 63 simultaneously; The brush 63 that 64 pairs of helical springs are housed in the brush carriage 62 applies elastic pressure, makes the side of 63 contacts of brush at commutator 50; Fixture 61 is used for brush carriage 62 is fixed on a side of casing 10.

As shown in Figure 3, in the brush assembly 60 of existing motor for vacuum cleaner, be housed in by lead 65 restriction brush carriage 62 inside brush 63 pull out distance, keep the resiliency supported states by helical spring 64, make brush 63 outstanding qualifications pull out distance; The bend strain of the contact portion of brush carriage 62 is combined on the terminal of link head, links the lead-out wire of the lateral coil that rotor 40 is arranged on the terminal of link head; Helical spring 64 makes 63 contacts of brush in a side of commutator 50, and brush 63 is attached on the lead 65 from brush carriage 62, by lead 65 energisings.

So, the electric current that a part of lead-in of the coil by stator 30 applies flows to lead-out wire again, will be by the electric current of the contact portion inflow of Elastic Contact on the terminal that is combined with the lead-out wire leading-out end, lead 65 on brush carriage 62 passes to brush 63, makes brush 63 obtain the resiliency supported CONTACT WITH FRICTION and electric current is imposed on coil in each groove that is wrapped in rotor 40 on commutator 50 and by commutator 50.

In addition, in opposite side brush assembly 60, according to making electric current from the lead-in adverse current of rotor 40 to the opposite side coil of stator 30 with above-mentioned opposite order, the magnetic flux that phasic difference by electric current produces drives rotor 40, by rotating shaft 41 revolving force of rotor 40 is passed to impeller 70, produce suction.

But there is following shortcoming in the brush assembly with existing motor for vacuum cleaner of said structure:

In the brush assembly of existing motor for vacuum cleaner, brush 63 and being used to is accommodated between the inner accepting space of brush carriage 62 of brush and is produced certain interval (Gap); The brush 63 of CONTACT WITH FRICTION on commutator 50 is rotated by above-mentioned gap, CONTACT WITH FRICTION is on commutator 50 obliquely, make rubbing surface one sidepiece and the commutator 50 of brush 63 keep slight distance, along with producing the rectification spark between brush 63 rubbing surfaces, one side that keeps slight distance and the commutator 50, make the user think by mistake and produced catastrophe failure, reduced the reliability of product.

Summary of the invention

In order to overcome the above-mentioned shortcoming that prior art exists, the invention provides a kind of brush assembly of motor for vacuum cleaner, to prevent that CONTACT WITH FRICTION from the terminal rectification spark that produces of the brush of commutator one side, improving reliability of products.

The technical solution adopted for the present invention to solve the technical problems is:

A kind of brush assembly of motor for vacuum cleaner, comprise fixture, brush carriage, brush and spring, fixture is fixed on a side of motor case, brush carriage runs through by fixture and is combined on the casing, brush can be housed in the inside of brush carriage with pulling out, spring carries out the elasticity pressurization to brush, make the side of an end CONTACT WITH FRICTION of brush at commutator, wire bond brush and brush carriage, make the energising of brush and brush carriage, limit the distance of pulling out of brush simultaneously, be formed with spring in this brush and add pressure surface, spring pressurization mask has certain angle of inclination, and spring adds pressure surface and the commutator direction of rotation is formed obliquely, and makes brush and commutator keep along the vertical plane CONTACT WITH FRICTION.

The present invention can prevent to produce between the outer peripheral face of commutator and the brush friction face rectification spark.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the half-sectional view of existing motor for vacuum cleaner.

Fig. 2 is the profile of the brush assembly of existing motor for vacuum cleaner.

Fig. 3 is the profile of the operating state of existing brush assembly.

Fig. 4 is the expansion profile of the A part of Fig. 3.

Fig. 5 is the half-sectional view of motor for vacuum cleaner of the present invention.

Fig. 6 is the profile of the brush assembly of motor for vacuum cleaner of the present invention.

Fig. 7 is the profile of the operating state of brush assembly of the present invention.

Fig. 8 is the expansion profile of the B part of Fig. 7.

The number in the figure explanation:

Θ: inclination angle 110: casing (HOUSING)

170: impeller (IMPELLER) 130: stator

140: rotor 150: commutator

160: brush assembly 161: fixture (HOLDER)

162: brush carriage (SUPPORTER) 163: brush

164: helical spring (COIL SPRING) 165: lead (LEAD WIRE)

Embodiment

Below with reference to back accompanying drawing paper, the structure and the action effect of the brush assembly of motor for vacuum cleaner of the present invention is elaborated.In the explanation, give identical symbol below, avoid repeat specification for the part identical with said structure.

As shown in Figure 5, motor for vacuum cleaner 100 of the present invention comprises: motor case 110, stator 130, link head, rotor 140, rotating shaft 141, commutator 150, impeller 170 impeller covers 120 and brush assembly 160.

Above-mentioned motor case 110 is the open cylindrical shapes of a side; Stator 130 is pressed on the inner peripheral surface that is fixed on motor case 110; The lead-out wire that link head is used for being wrapped in the coil on the stator 130 is attached at terminal; Rotor 140 rotatably is inserted in the inboard of stator 130; Rotating shaft 141 runs through the center that is combined in rotor 140, with rotor 140 interlocks; Commutator 150 is pressed on the axis of rotating shaft 141 and is fixed on rotor 140 1 sides, and the while can impose on electric current the coil in each groove that is wrapped in rotor and link; Impeller 170 is fixed on rotating shaft 141 1 ends of commutator 1150 opposite faces; It is open distolateral that impeller cover 120 is combined in casing 110, is used to accommodate impeller 170; Brush assembly 160 runs through casing 110, and sliding surface is contacted in casing 110 inner commutator 150 1 sides, applies electric current.

As shown in Figure 6, brush assembly 160 comprises: brush 163, brush carriage 162, lead 165, helical spring 164 and fixture 161.

The brush 163 of above-mentioned elasticity ear of maize shape has the square cross-section shape; Brush carriage 162 can be accommodated brush 163 with pulling out; Lead 165 links brush 163 and brush carriage 162, makes brush 163 and brush carriage 162 energisings, limits the distance of pulling out of brush 163 simultaneously; The brush 163 that 164 pairs of helical springs are housed in the brush carriage 162 carries out the elasticity pressurization, makes the side of 163 contacts of brush at commutator 150; Fixture 161 is used for brush carriage 162 is fixed on a side of casing 110.

Be formed with spring in the brush 163 and add pressure surface, spring adds that pressure surface is formed slopely according to certain angle, brush 163 frictional engagement are pressurizeed to helical spring 164 on commutator 150 1 sides, prevent because the revolving force of commutator 150 makes the rotation of brush 163 according to certain angle.

Spring adds pressure surface and the commutator direction of rotation forms certain angle (Θ).

Below, the work of the brush assembly of motor for vacuum cleaner of the present invention with said structure is elaborated.

As Fig. 7, shown in 8, the spring that is housed in the brush 163 of brush carriage 162 inside by 164 pairs of helical springs adds pressure surface and pressurizes, the opposite side rubbing surface contact that makes brush 163 is on a side of commutator 150, the electric current that a part of lead-in of the coil by stator 130 applies flows to lead-out wire again, will be by the electric current of the contact portion inflow of Elastic Contact on the terminal that is combined with the lead-out wire leading-out end, lead 165 on brush carriage 162 passes to brush 163, makes brush 163 obtain the resiliency supported CONTACT WITH FRICTION and electric current is imposed on coil in each groove that is wrapped in rotor 140 on commutator 150 and by commutator 150.

At this moment, the plus-pressure that adds the helical spring 164 that pressure surface pressurizes by spring to the brush 163 that is formed slopely, can prevent that the brush 163 of CONTACT WITH FRICTION on commutator 150 1 sides that are rotated is rotated according to minute angle in brush carriage 162 inner accepting space, make brush 163 not separate with commutator 150, along the vertical plane CONTACT WITH FRICTION, prevented the generation of rectification spark.

The effect of invention

The brush assembly of motor for vacuum cleaner provided by the invention can bring following effect.

In the brush assembly of motor for vacuum cleaner of the present invention, can prevent the periphery of commutator Face and CONTACT WITH FRICTION produce the rectification spark between the brush friction face on the commutator outer peripheral face, improved product The reliability of product.

Claims

1. the brush assembly of a motor for vacuum cleaner, comprise fixture, brush carriage, brush and spring, fixture is fixed on a side of motor case, brush carriage runs through by fixture and is combined on the casing, brush can be housed in the inside of brush carriage with pulling out, spring carries out the elasticity pressurization to brush, make the side of an end CONTACT WITH FRICTION of brush at commutator, wire bond brush and brush carriage, make the energising of brush and brush carriage, limit the distance of pulling out of brush simultaneously, it is characterized in that: be formed with spring in the described brush (163) and add pressure surface, spring pressurization mask has certain angle of inclination, and spring adds pressure surface and commutator (150) direction of rotation is formed obliquely, and makes brush (163) and commutator (150) keep along the vertical plane CONTACT WITH FRICTION.