CN104242535B - Electric brush disc assembly - Google Patents

Electric brush disc assembly Download PDF

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Publication number
CN104242535B
CN104242535B CN201410241758.4A CN201410241758A CN104242535B CN 104242535 B CN104242535 B CN 104242535B CN 201410241758 A CN201410241758 A CN 201410241758A CN 104242535 B CN104242535 B CN 104242535B
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CN
China
Prior art keywords
brush
groove
disk
contact site
brush disk
Prior art date
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Active
Application number
CN201410241758.4A
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Chinese (zh)
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CN104242535A (en
Inventor
藤田徹
前田昌良
G·肯勒
J·施密德
T·库伯勒
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Motors and Actuators Germany GmbH
Nidec Corp
Original Assignee
Nidec Motors and Actuators Germany GmbH
Nidec Corp
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Publication of CN104242535A publication Critical patent/CN104242535A/en
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Publication of CN104242535B publication Critical patent/CN104242535B/en
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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00Rotary current collectors, distributors or interrupters
    • H01R39/02Details for dynamo electric machines
    • H01R39/18Contacts for co-operation with commutator or slip-ring, e.g. contact brush

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  • Motor Or Generator Current Collectors (AREA)

Abstract

The invention provides an electric brush disc assembly. The technology for raising operation during assembly of an electric brush disc assembly or assembly of the electric brush disc assembly and a rotor and lowering electric brush breaking possibility is provided. In the electric brush disc assembly, the other end part has a first groove recessed towards the radial inner side and extending along the circumference. An explosion part which is not covered by a brush holder is arranged near at least the other end part of the electric brush. The explosion part has a second groove recessed along the circumference and extending along the radial direction. The radial outer end part of the second groove is connected with the first groove. The other end of a pressing component has a contact part bending towards the center of a hole. Part of the contact part contacts the first groove.

Description

Brush disk assembly
Technical field
The present invention relates to the manufacture method of a kind of brush disk assembly and brush disk assembly.
Background technology
All the time, propose have one kind using brush spring, brush to be exerted a force to radially inner side, and to brush to commutator The technology of force.For example in Japanese Kokai 2010-124518 publication, record such technology.
And, when proposing to have a kind of brush carrier side sub-unit in assembling, carry out the technology of temporary transient fixed brush using limiting unit.Example As recorded such technology in the flat 07-288952 publication of Japanese Kokai.
Content of the invention
But, in the technology described in Japanese Kokai 2010-124518 publication, outside to footpath to brush Side force, peripheral side movement from the position that contact with brush spring of brush to brush when, exist due to from brush spring to electricity Brush the power applying and make the problem of brush rupture.
And, in the technology described in the flat 07-288952 publication of Japanese Kokai, due to needing in order to temporary transient Fixed brush and limiting unit is set, therefore there is a problem of man-hour number increase and make operating efficiency decline.And, releasing temporarily During the state of fixed brush, because brush is moved with both commutators, therefore brush and commutator collide, and brush has can Rupture can be produced.
The present invention be in view of above-mentioned problem and complete, its objective is to provide and a kind of improve during assembling brush disk assembly or group Dress brush disk assembly and operating efficiency during rotor, and reduce the technology that brush occurs the possibility of rupture.
The brush disk assembly of the exemplary first embodiment of the present invention is characterised by, comprising: discoid brush Disk, it has the hole of insertion vertically in central portion;Bar-shaped brush, it is respectively provided with end face at radial direction two ends, and described rod The brush of shape on described brush disk by end face towards configuring in the way of the center in described hole;Brush carrier, it has along described electricity The side of sidewall portion that the peripheral side of brush extends in the axial direction;And pressure-producing part, it is another for one end is held in described brush disk The wire rod that one end is contacted with the other end of described brush.The other end of described brush has to radially inner side depression and edge The first circumferentially extending groove, has the extending part not covered by described brush carrier near at least other end of described brush. Described extending part has the second groove being circumferentially recessed and radially extending.Its radially outer end of described second groove and described the One groove connects, and the other end of described pressure-producing part has the contact site of the center curvature to described hole.The one of described contact site Part is contacted with described first groove.
In the exemplary first embodiment of the present invention, when brush significantly moves to radial outside, contact site Successfully move to the second groove from the first groove, contact site is contacted with the second groove.Now, compared with when being not provided with the second groove, setting During the second groove, contact site occurs the displacement of elastic deformation little.Therefore, compared with when being not provided with the second groove, during setting the second groove To contact site occur elastic deformation displacement proportional be applied to brush power also little.Therefore, the second groove when ratio is set It is not provided with during the second groove, reducing the possibility that brush occurs rupture.
Brief description
Fig. 1 is the sectional view illustrating to have the motor of brush disk assembly.
Fig. 2 is the top view illustrating brush disk assembly.
Fig. 3 a is the stereogram of the brush disk assembly illustrating to observe from the blank arrowhead x of Fig. 2.
Fig. 3 b is the stereogram of the brush disk assembly illustrating to observe from the blank arrowhead y of Fig. 2.
Fig. 4 is the stereogram of brush.
Fig. 5 is the enlarged side view illustrating brush peripheral structure.
Fig. 6 is the stereogram of brush carrier.
Fig. 7 is the amplification plan view illustrating brush peripheral structure.
Fig. 8 a is the amplification plan view of the brush peripheral structure before illustrating temporarily to fix.
Fig. 8 b is the amplification plan view of the brush peripheral structure before illustrating temporarily to fix.
Fig. 8 c is the amplification plan view of the brush peripheral structure after illustrating temporarily to fix.
Symbol description
J central axis;
100 motors;
101 rotors;
102 axles;
103 commutators;
104 stators;
105 casings;
106 magnet;
107 bearings;
1 brush disk assembly;
2 brush disks;
21 holes;
22 guide parts;
221 times spigot surfaces;
222 horizontal spigot surfaces;
23 fixed parts;
231 protuberances;
232 incorporating sections;
24 maintaining parts;
241 circular maintaining parts;
242 linear maintaining parts;
2421 wall portions;
3rd, 4 brush;
31 end face;
32 other ends;
The region of ua axial direction upside;
The region of da axial direction downside;
321 first grooves;
33 extending parts;
331 second grooves;
34 stage portion;
5th, 6 brush carrier;
51 upper wall portions;
52 side of sidewall portion;
53 foots;
7th, 8 pressure-producing part;
71 one end;
72 the other end;
721 contact sites;
73 main parts;
9th, 10 choke coil.
Specific embodiment
Hereinafter, referring to the drawings the exemplary embodiment of the present invention is illustrated.In addition, in the present invention, respectively The direction parallel with the central axis j of motor is referred to as " axial ", the direction orthogonal with the central axis j of motor is referred to as " footpath To ", the direction along the circular arc centered on the central axis j of motor is referred to as " circumferential ".And, in the present invention, with center Axis j direction illustrates to the shape of each several part and position relationship for above-below direction.But, the definition of this above-below direction is not Limit the motor involved in the present invention direction when using.
Fig. 1 is the figure of the motor 100 of brush disk assembly 1 illustrating to have the present invention.Motor 100 have rotor 101 and Stator 104.Rotor 101 is rotatably supported in stator 104 by bearing 107.
Rotor 101 has axle 102 and commutator 103.Stator 104 has to be had the cylindric casing 105 of lid, is fixed on machine The magnet 106 of the inner peripheral surface of shell 105 and brush disk assembly 1.Brush disk assembly 1 is accommodated in the inside of casing 105.
Fig. 2 is the top view illustrating brush disk assembly 1.
Brush disk assembly 1 have brush disk 2, multiple brush 3,4, multiple brush carrier 5,6, multiple pressure-producing part 7,8 and gripping Stream circle 9,10.But, in the present invention, brush 3,4, brush carrier 5,6, pressure-producing part 7,8 and choke coil 9,10 respective numbers It is not limited to the number of present embodiment.The number of such as brush can also be four.
Hereinafter, using the electricity in Fig. 3 a, Fig. 3 b, Fig. 4, Fig. 5 and Fig. 6 exemplary first embodiment to the present invention Each structure of brush assembly 1 illustrates.In addition, following for convenience, for being configured with brush 3, brush carrier 5, pressure-producing part 7 And the peripheral structure of choke coil 9, brush disk assembly 1 is illustrated.
Fig. 3 a is the stereogram observing brush disk assembly 1 from the blank arrowhead x of Fig. 2.Fig. 3 b is the blank arrowhead y from Fig. 2 Observe the stereogram of brush disk assembly 1.Fig. 4 and Fig. 6 is respectively the stereogram of brush 3 and brush carrier 5.Fig. 5 is to illustrate to configure The enlarged side view of the peripheral structure of brush 3.
The discoid part that brush disk 2 is made for resin.It is provided with the hole of insertion vertically in the central portion of brush disk 2 21.And, brush disk 2 has: brush 3 is kept into the guide part 22 that can move radially;To the brush carrier 5 covering brush 3 The fixed part 23 being fixed;And maintaining part 24, it keeps pressurization brush 3 force being made brush 3 contact with commutator 103 Part 7.In addition, brush disk can not also be discoid.Can also be for example central portion be provided with hole elliptical shape portion Part.
As shown in Figure 3 b, the guide part 22 of brush disk 2 has: leads under axially opposed with the axial lower surface of brush 3 To face 221;And circumferential two sides opposed pairs horizontal spigot surface 222a, the 222b with brush 3.A pair horizontal spigot surface 222a, 222b extends to axially upside from the circumferential two ends of lower spigot surface 221.The circumferential width of brush 3 and a pair horizontal spigot surface 222a, Circumferential width between 222b is roughly the same.Therefore, brush 3 stably can not move radially to peripheral, oblique.
As shown in Figure 3 b, the circumferential central portion of the lower spigot surface 221 of brush disk 2 is recessed vertically in the whole region of radial direction Fall into.Now, compare with lower spigot surface homogeneous and flat in the circumferential, the axial lower surface of brush 3 and the lower guiding of brush disk 2 The contact area in face 221 is little.Therefore, the frictional resistance producing between brush 3 and brush disk 2 is little, so that brush 3 is easy to move Dynamic.But, lower spigot surface 221 not limited to this of present embodiment or flat.
As shown in figure 4, brush 3 be respectively radial direction two ends have end face and on brush disk 2 with end face 31 towards hole The bar-shaped part that the mode at 21 center configures.In addition, so-called bar-shaped both can be cylindric or polygon prism Shape.Although the brush 3 in present embodiment has the shape of substantially quadrangular shape, not limited to this.
The end face 31 of brush 3 is with commutator 103 in diametrically contraposition.End face 31 due to brush 3 is connect with commutator 103 Touch, therefore rotor 101 passes through brush 3 and commutator 103 is energized, and rotor 101 is rotated by this energising.
As shown in Fig. 3 a, Fig. 4 and Fig. 5, the region ua of the other end 32 of brush 3 side in the axial direction has inside to footpath Side depression and the first groove 321 circumferentially.And, have near at least other end 32 of brush 3 and do not covered by brush carrier 5 The extending part 33 of lid.Extending part 33 has the second groove 331 being circumferentially recessed and radially extending, the footpath of the second groove 331 Outwards end is connected with the first groove 321.That is, the first groove 321 and the second groove 331 are arranged in the region ua on the upside of axially.
Additionally, it is preferred that the first groove 321 is identical with the axial location of the second groove 331.Thus, fix brush described later temporarily When 3, brush 3 can be suppressed in axial shake.That is, the possibility that brush 3 produces rupture can be reduced.
At the first groove 321 and the continuous position of the second groove 331, the flexure plane that has to radially inner side and be circumferentially recessed. Thus, brush 3 described later is temporarily being fixed in the operation of brush disk 2, the contact site 721 of pressure-producing part 7 can be successfully Mobile to the second groove 331 from the first groove 321.And then, the possibility that brush 3 produces rupture can be reduced.In addition, the shape at this position Shape can not also be inclined plane for flexure plane.Flexure plane is the face of the point on junction curve, and inclined plane is to connect directly The face of the point on line, both are significantly different.
The other end 32 of brush 3 has the stage portion 34 to radially inner side depression in the region da of axially downside.Step Portion 34 is radially opposed with least a portion of brush disk 2 and casing 105.That is, the axial direction in the other end 32 of brush 3 The region da of downside, is configured with stage portion 34, at least a portion of brush disk 2 and casing 105 successively from radially inner side.And And, the other end 32 of brush 3 in being provided with the axially region ua of upside of the first groove 321 and the second groove 331 with casing 105 in diametrically contraposition.That is, the region ua of the axially upside in the other end 32 of brush 3, is configured with successively from radially inner side First groove 321, casing 105.
In addition, the oriented outer wall that axially upside extends of periphery setting in brush disk 2.Outer wall is all with brush 3 identical To position, there is the notch to axially downside depression.The position being provided with the first groove 321 that brush 3 can be made is located at this otch Portion.That is, in the other end 32 of brush 3, the first groove 321 can be made to be located at radial outside as far as possible.Thus, aftermentioned in releasing Brush 3 be temporarily fixed to brush disk 2 state when it is easy to from radial outside to radially inner side the other end 32 to brush 3 Force.I.e., it is possible to increase operating efficiency.
In addition, the axial upper surface of the protuberance 231 of fixed part 23 is located at leaning on the upside of axial direction than the axial upper surface of brush 3 Position.Thus, in temporary transient fixed brush 3, even if making brush 3 to fixed part 23 because of the power applying by pressure-producing part 7 Roll tiltedly it is also possible to prevent brush 3 from coming off from brush disk 2.
As shown in fig. 6, brush carrier 5 has the covering upper wall portions 51 of axial upper surface of brush 3 and the peripheral side along brush 3 The side of sidewall portion 52 that face extends in the axial direction.Side of sidewall portion 52 has near the radial direction central portion of brush 3 to axially downside extension Side wall 521 and foot 522a, 522b of extending to axial direction downside near the longitudinal end of brush 3.
Fig. 7 is the amplification plan view illustrating to configure the peripheral structure of brush 3.Brush 3 and brush carrier 5 do not illustrate.
Fixed part 23 has fixed part 23a and fixed part 23b.Fixed part 23a, 23b are respectively provided with and prolong on the upside of axial direction Protuberance 231a, the 231b stretching.Protuberance 231a, 231b have incorporating section 232a, the 232b to axially upper side opening.In storage Portion 232a, 232b are pressed into foot 522a, 522b of brush carrier 5, thus brush disk 2 is mutually fixed with brush carrier 5.
Pressure-producing part 7 is held in brush disk 2 and what the other end 72 was contacted with the other end 32 of brush 3 for one end 71 Wire rod.In the present embodiment, pressure-producing part 7 is expressed as by one end 71, the other end 72 and the master being wound around in the shape of a spiral The helical spring that body 73 is constituted.
The one end 72 of pressure-producing part 7 and main part 73 are kept by the maintaining part 24 of brush disk 2.Maintaining part 24 There is circular maintaining part 241 and linear maintaining part 242, described circle maintaining part 241 coordinates the shape of main part 73 to be cut It is in circular except being formed as overlooking, described linear maintaining part 242 is prolonged along one end 71 towards the other end 32 of brush 3 The direction stretched is formed to an axially downside excision part.
Section when observing from the direction that one end 71 is extended of linear maintaining part 242 is in substantially "U" shape.Directly Wire maintaining part 242 has the wall portion 2421 of the radial outside covering one end 71.Here, brush 3 described later is temporarily solid When brush disk 2, the other end 72 of pressure-producing part 7 is exerted a force to radial outside by brush 3.It is accompanied by this, to pressure-producing part 7 One end 71 also to radial outside exert a force.But, in the present embodiment due to being provided with wall portion 2421, therefore, it is possible to suppress The one end 71 of pressure-producing part 7 moves to radial outside.That is, can stably from pressure-producing part 7, brush 3 be pressurizeed.
As shown in fig. 7, the other end 72 of pressure-producing part 7 has the contact site of the center curvature in the hole 21 to brush disk 2 721.A part for contact site 721 is contacted and elastic deformation with the first groove 321 of brush 3.Wherein, contact site 721 differs orientation The center curvature in the hole 21 of brush disk 2.That is, the direction changes before and after temporarily fixing brush 3 described later.And, connect The axial width of contact portion 721 is wider than the first groove 321 of the other end 32 being arranged at brush 3 and each axial direction of the second groove 331 Degree is little.Thus, the contact site 721 of pressure-producing part 7 can be successfully mobile in the first groove 321 and the second groove 331.But, this Embodiment not limited to this.That is, the axial width of contact site 721 can also be with the first of the other end 32 being arranged at brush 3 Each axial width of groove 321 and the second groove 331 identical or than be arranged at brush 3 the first groove 321 of other end 32 and Each axial width of the second groove 331 is big.
Hereinafter, using the brush disk group in exemplary second embodiment to the present invention of Fig. 8 a, Fig. 8 b and Fig. 8 c The manufacture method of part 1 illustrates.Fig. 8 a and Fig. 8 b is the amplification plan view of the brush peripheral structure before illustrating temporarily to fix. Fig. 8 c is the amplification plan view of the brush peripheral structure after illustrating temporarily to fix.The difference of Fig. 8 a and Fig. 8 b is, with plus The position of the brush 3 of contact site 721 contact of splenium part 7 is different.
First, pressure-producing part 7 is held in brush disk 2.That is, the contact site 721 of pressure-producing part 7 is radially oriented inner side, And by the main part 73 of the circular maintaining part 241 of maintaining part 24 and pressure-producing part 7 in axial overlap, in this condition, by main body Portion 73 is embedded into circular maintaining part 241 on the upside of axial direction.
Here, brush 3 is configured the periphery in the hole 21 in brush disk 2.As shown in Figure 8 a, in the guide part 22 of brush disk 2 In, so that the state that brush 3 is radially oriented outside with its other end 32 is moved to radial outside.Make the first groove 321 of brush 3 with The contact site 721 of pressure-producing part 7 contacts.In addition, in this case, from pressure-producing part 7 to blank arrowhead institute from brush 3 to Fig. 8 a The direction force shown.
Then, state shown in from Fig. 8 a for the brush 3 is made to move to radial outside further.Fig. 8 b illustrates pressure-producing part 7 Contact site 721 with the first groove 321 of brush 3 and the second groove 331 continuous location contacts state.
In this case, from pressure-producing part 7 to brush 3 to the blank arrowhead of Fig. 8 b shown in direction force.Now, brush 3 are possible to peripheral, oblique.
But, as shown in Figure 8 b, the peripheral side of brush 3 side of the protuberance 231a of fixed part 23a is from another with brush 3 The approximately the same radial position of radial position of end face 32 extends to radial outside.Therefore, by described protuberance 231a Peripheral side, brush 3 can be suppressed to peripheral, oblique.That is, the possibility that brush 3 occurs rupture can be reduced.
Finally, brush 3 is temporarily fixed to brush disk 2.Fig. 8 c illustrates the state after temporarily fixing.Make brush 3 from Fig. 8 b Shown state moves to radial outside further.The contact site 721 of pressure-producing part 7 is made to be connected with the second groove 331 of brush 3. In this condition, from pressure-producing part 7 to brush 3 to the blank arrowhead of Fig. 8 c shown in direction force.This state is that brush 3 is temporary transient It is fixed on the state of brush disk 2.In addition, identical with Fig. 8 b, also can be by the peripheral side suppression of protuberance 231a in Fig. 8 c Brush processed 3 is to peripheral, oblique.That is, the possibility that brush 3 occurs rupture can be reduced.
Then, the operation of the state releasing temporary transient fixed brush 3 is illustrated.
First, in the hole 21 of axle 102 and brush disk 2 in the state of axial overlap, axle 102 is inserted into commutator 103 And the consistent assigned position of axial height of brush 3.Then, inside to footpath from radial outside to the other end 32 of brush 3 Side exerts a force.
Thus, with from Fig. 8 c to Fig. 8 b, the state temporarily fixed from the order of Fig. 8 b to Fig. 8 a, solution discharging brush 3.Brush 3 end face 31 is contacted with commutator 103, simultaneously first groove 321 contact with pressure-producing part 7 of the other end 32 of brush 3 Portion 721 contacts.
So, due to miscellaneous part need not be arranged for temporary transient fixed brush 3, this other portion is set therefore, it is possible to reduce The flow chart of part, thus improve operating efficiency.And, when releasing the state of temporary transient fixed brush 3, do not move commutator 103 and shifting brush 3.That is, due to not being commutator 103 and brush 3 both sides move, produce therefore, it is possible to reduce brush 3 The possibility of rupture.
More than, the exemplary first embodiment and second embodiment of the present invention is illustrated, but this The structure of invention is not limited to above-mentioned example.For example, each embodiment and each key element of appearance in its variation are not producing Can also be combined as in the range of contradiction.
In addition, the present invention for example can be used in anti-locking braking device motor.

Claims (6)

1. a kind of brush disk assembly, it is used in motor, and has:
Discoid brush disk, it has the hole of insertion vertically in central portion;
Bar-shaped brush, it is respectively provided with end face at radial direction two ends, and described bar-shaped brush on described brush disk with one end Mode facing to the center in described hole configures;
Brush carrier, it has the side of sidewall portion that the peripheral side along described brush extends in the axial direction;And
Pressure-producing part, its line that the other end is contacted with the other end of described brush for one end is held in described brush disk Material,
By being exerted a force towards described hole to described brush by described pressure-producing part, described brush is connect with the commutator of described motor Touch,
The region of the other end of described brush side in the axial direction has to radially inner side depression and the first groove circumferentially,
In the peripheral side of described brush with the peripheral side of described side of sidewall portion opposite side on, and be side in the axial direction Region in, there is near at least other end the extending part not covered by described brush carrier, described extending part has edge Circumference depression and the second groove radially extending, its radially outer end of described second groove is connected with described first groove,
The other end of described brush has the stage portion to radially inner side depression in the region of axially downside,
In the oriented outer wall that axially upside extends of periphery setting of described brush disk, described outer wall is all with described brush identical To position, there is the notch to axially downside depression,
The other end of described pressure-producing part has the contact site of the center curvature to described hole,
Contacted with described first groove by the part making described contact site, act on described electricity towards the power at the center in described hole Brush, described brush is contacted with described commutator,
Contacted with described second groove by the part making described contact site, act on institute towards the power of the circumference of described side of sidewall portion State brush, described brush can not contiguously be temporarily fixed to described brush disk with described commutator.
2. brush disk assembly according to claim 1, wherein,
The position that its radially outer end of described second groove is connected with described first groove has flexure plane.
3. brush disk assembly according to claim 1, wherein,
Each axial location of described contact site, described first groove and described second groove is identical.
4. brush disk assembly according to claim 1, wherein,
The axial width of described contact site is less than each axial width of described first groove and described second groove.
5. brush disk assembly according to claim 1, wherein,
Described brush disk has the maintaining part of the one end keeping described pressure-producing part,
Described maintaining part has the wall portion of the radial outside covering described one end.
6. brush disk assembly according to claim 1, wherein,
Described brush disk has the fixed part that described brush carrier is fixed,
When temporarily securing described brush, the peripheral side of described fixed part than described brush other end to radially Inner side extends.
CN201410241758.4A 2013-06-06 2014-06-03 Electric brush disc assembly Active CN104242535B (en)

Applications Claiming Priority (2)

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JP2013120162A JP6099264B2 (en) 2013-06-06 2013-06-06 Brush card assembly and method of manufacturing brush card assembly
JP2013-120162 2013-06-06

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CN104242535A CN104242535A (en) 2014-12-24
CN104242535B true CN104242535B (en) 2017-01-18

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DE (1) DE102014210639A1 (en)

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Publication number Priority date Publication date Assignee Title
US11664701B2 (en) 2018-11-22 2023-05-30 Panasonic Intellectual Property Management Co., Ltd. Motor and brush housing part

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US3710160A (en) * 1971-08-12 1973-01-09 Dynamics Corp America Motor brush assembly
JPH08154362A (en) * 1994-11-25 1996-06-11 Yaskawa Electric Corp Electric motor brush device
JPH1056761A (en) * 1996-08-06 1998-02-24 Mitsuba Corp Temporary holding device for brush in motor
EP0851541A1 (en) * 1996-12-27 1998-07-01 Mitsuba Corporation Brush holder device
JPH11196553A (en) * 1997-12-26 1999-07-21 Mitsuba Corp Brush
EP1324439A2 (en) * 2001-12-26 2003-07-02 Asmo Co. Ltd. Brush holding device, motor having the same, and method for assembling motor
JP2008092678A (en) * 2006-10-02 2008-04-17 Igarashi Denki Seisakusho:Kk Brush holding structure in DC motor
JP2009171668A (en) * 2008-01-11 2009-07-30 Mitsuba Corp Brush device
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CN201577000U (en) * 2009-12-21 2010-09-08 康平科技(苏州)有限公司 Motor spring anti-contact commutator
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JP6099264B2 (en) 2017-03-22
DE102014210639A1 (en) 2015-04-16
CN104242535A (en) 2014-12-24
JP2014239584A (en) 2014-12-18

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