CN101562385B - Electric motor - Google Patents

Electric motor Download PDF

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Publication number
CN101562385B
CN101562385B CN2009101338616A CN200910133861A CN101562385B CN 101562385 B CN101562385 B CN 101562385B CN 2009101338616 A CN2009101338616 A CN 2009101338616A CN 200910133861 A CN200910133861 A CN 200910133861A CN 101562385 B CN101562385 B CN 101562385B
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CN
China
Prior art keywords
carbon brush
wall portion
shell
face
flat part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN2009101338616A
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Chinese (zh)
Other versions
CN101562385A (en
Inventor
刘清式
张文泰
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.)
Dechang Electric Machinery (Jiangmen) Co., Ltd.
Original Assignee
Johnson Electric Shenzhen Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johnson Electric Shenzhen Co Ltd filed Critical Johnson Electric Shenzhen Co Ltd
Publication of CN101562385A publication Critical patent/CN101562385A/en
Application granted granted Critical
Publication of CN101562385B publication Critical patent/CN101562385B/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14—Means for supporting or protecting brushes or brush holders
    • H02K5/143—Means for supporting or protecting brushes or brush holders for cooperation with commutators
    • H02K5/145—Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/06—Machines characterised by means for keeping the brushes in a retracted position during assembly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Dc Machiner (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

The present invention provides an electric motor, comprising a housing; a rotor equipped in the housing, comprising a rotating shaft, a rotor iron core and a commutator provided on the rotating shaft, and a winding winded on the iron core; an end cap provided at opening end of the housing, the cap comprising a metal member and a carbon brush installation card provided with a terminal and a carbon brush connecting to the terminal. Wherein the carbon brush installation card comprises a flat section vertical to the rotating shaft and a wall section extending from the flat section, the wall section comprises an external face, an internal face, a top face, and a pair of paths for a carbon brush separating device to enter into the carbon brush to contact the carbon brush, the paths pass through the external face and the internal face, and are away from the top face such that the top face of the wall section is continuous above the paths. The present invention may prevent the wall section from being divided into several segments to make a notch position as a position of the carbon brush installation plate easy to deform and generate shock caused by notch because the top ends of paths are closed, thereby reducing shock in shock source aspect.

Description

Motor
[technical field]
The present invention relates to motor, be specifically related to the end cap of brush motor.
[background technology]
Motor has plurality of applications, and the minitype permanent magnetism direct current machine is normally used for the automobile assistant drive system, on computer system and the office equipment.Along with the continuous upgrading of car gage, be exactly the noise problem in the compartment wherein by one of focus.Therefore, will be considered to defective if when the parts of operation in the compartment, produce noise.Therefore, industry is devoted to find and reduce this noise.Wherein a kind of noise source system comes from the vibrations of vibrations, especially the electric motor end cap parts of plastics (just carbon brush is installed card) of motor housing, and this vibrations mainly occur in the fluting place that carbon brush is installed the confession carbon brush separating device process of card.
United States Patent (USP) is announced No. 6465927 for reducing the noise that vibrations produce from end cap, in the parts of plastics of end cap most elastic foots is set, and said elastic foot elasticity compresses the metal section and part of end cap, thereby but absorbing vibration, can audible noise to reduce the people.
Yet above-mentioned United States Patent (USP) does not reduce the generation of vibrations from focus, and just attempts to absorb the vibrations that produced.
[summary of the invention]
The present invention provides a kind of motor, and shell is equipped with magnet in the said shell, and said shell has an openend; Round rotor comprises rotating shaft, rotor core and is installed in commutator in the rotating shaft, is wound in the winding in the rotor core that said winding is electrically connected with commutator; End cap is installed on the openend of said shell, and said end cap comprises that metal parts and carbon brush install card; Said carbon brush is installed card and is provided with the carbon brush that pair of terminal and a pair of and said terminal are electrically connected, and wherein, said carbon brush installation blocks flat part vertical with rotating shaft and the wall portion of extending vertically from flat part of comprising; Said flat part is provided with the opening that supplies rotating shaft to pass, and said wall portion comprises outer surface, inner surface; End face; And a pair of confession carbon brush separating device gets into the passage that carbon brush is installed contact carbon brush in the card, and said passage runs through the outer surface of said wall portion with inner surface and away from said end face, thereby makes that the end face of said wall portion is continuous above passage.
The present invention further improves and is: said passage is the through hole that radially runs through outer surface and inner surface that is arranged at said wall portion.
The present invention further improves and is: said wall portion has the body that fixes with flat part, said passage be located at said body near the flat part place, and relative with the depression of being located at the flat part outer peripheral face.
The present invention further improves and is: the open circumferential of said flat part is extended with a lip along the direction away from metal parts.
The present invention further improves and is: the outer surface of said wall portion is provided with some fins that extend vertically, and said fin is replaced the inner surface of shell aperture end.
The present invention further improves and is: the end face of said wall portion is provided with some convex closures, said convex closure along motor shaft to an axial end of replacing said magnet.
The present invention further improves and is: said magnet is ferro-gum, and said convex closure part at least is conical, and inserts in the said magnet.
The present invention further improves and is: the outer surface that said carbon brush is installed card is provided with some projections, and said projection cooperates the breach of shell aperture end, firmly is installed between metal parts and the shell thereby said carbon brush is installed card.
The present invention further improves and is: the openend inner surface of said shell is provided with step, and said end cap is installed on said step place, thus but axial location end cap.
The present invention further improves and is: said carbon brush is installed card and is made of plastics.
Embodiments of the invention have following beneficial effect: because the top of passage is closed; Thereby can avoid in the prior art owing to fluting makes wall portion the fluting place become carbon brush card is installed is prone to deform and produces the vibrations part along circumferentially being divided into plurality of sections, thereby reduce the generation of vibrations from focus.
[description of drawings]
Fig. 1 is the cutaway view of the motor of one embodiment of the invention;
Fig. 2 is the schematic perspective view of the electric motor end cap of one embodiment of the invention;
Fig. 3 is the schematic perspective view that the carbon brush of the motor of one embodiment of the invention is installed card;
Fig. 4 is the schematic perspective view of the electric motor end cap of prior art.
[embodiment]
To combine accompanying drawing that the present invention is set forth below.
Shown in Figure 1 is the cutaway view of the motor 10 of one embodiment of the invention, and said motor 10 is for there being the brush permanent magnet DC motor, especially refers to the small-sized brush permanent magnet DC motor that has.Said motor 10 comprises a cylindrical case 12, and said shell 12 has a blind end 16 and openend 14.Blind end 16 is equipped with bearing 18, and openend 14 is by end cap 20 sealings.
See also Fig. 2 and Fig. 3, said end cap 20 is made up of the metal parts that is positioned at the outside 22 and carbon brush installation card 26 two parts that are positioned at the inboard, and metal parts 22 is tabular, is formed from steel, and metal parts 22 is mounted to shell 12 and another bearing 24 is installed in it.Carbon brush is installed card 26 and is made of plastics, and carbon brush 28 and motor terminal 30 are installed on it.Carbon brush is installed the wall portion 44 that card 26 comprises flat part 42 and extend away from metal parts 22 vertically from flat part 42 edges, and said wall portion 44 comprises outer surface 46, inner surface 47, and end face 48 and body 49, said body 49 is one-body molded with flat part 42.
Said shell 12 inside are equipped with rotor 32, and said rotor 32 comprises rotating shaft 34, rotor core 36, and commutator 38, and be wound in the winding 40 on unshakable in one's determination 36, said winding 40 is electrically connected with commutator 38.Rotating shaft 34 is installed through bearing 18,38.Magnet 13 is installed on the inner surface of shell 12.
Carbon brush 28 is used for and commutator 38 sliding contacts, thereby electric current is passed to winding 40 from terminal 30 through carbon brush 28, commutator 38.Said carbon brush 28 does not have the carbon brush body, directly contacts with commutator 38 through flexible deformable carbon brush arm, and said carbon brush arm end can be divided into most finger-shaped, therefore is called the finger-shaped carbon brush.During use, thereby keep certain Elastic Contact power between carbon brush arm generation elastic bending deflection and commutator.Alternatively, said carbon brush also can comprise carbon brush body and brush arm, and the carbon brush body-fixed is used for and the commutator Elastic Contact in the end of brush arm.
Above-mentioned two kinds of carbon brush, carbon brush arm need separate so that commutator inserts wherein.This needs the separating device of a strip usually, when end cap is mounted to rotor, inserts and the carbon brush arm is pushed aside from a side of carbon brush arm, and this step accomplished before rotor inserts shell fully usually, stops that to prevent shell separating device inserts.Yet usually, carbon brush is installed card 26 and is had the inner surface that axially extended cylindrical wall 44 is used to contact shell 12 open side 14; Wall portion 44 can become separating device and stretch into the obstacle that carbon brush is installed card inside, therefore, and in prior art as shown in Figure 4; Usually can offer some flutings 82 in the wall portion 44; Stretch into inner contact brush arm for separating device, said fluting passes the end face of wall portion 44, and wall portion 44 edges circumferentially are divided into plurality of sections; The fluting place will become carbon brush the yielding and generation vibrations part of card will be installed because intensity is relatively poor.
Become the relatively poor part of intensity in order to overcome at the fluting place, in embodiments of the present invention, fluting is replaced by passage 50, and said passage 50 passes wall portion 44, and the top of passage 50 is closed, and the end face that also is wall portion 44 is a continuous surface, so passage 50 picture tunnel forms.Be injection mo(u)lding if carbon brush is installed card 26, flat part 42 respective channel 50 places also can be set to opening, thereby simplify mould, convenient processing.Because the top of passage 50 is closed, the body 49 of wall portion 44 is one-body molded with flat part 42, and wall portion 44 can be supported, so passage 50 can not become the relatively poor place of intensity.And, between wall portion 44 inboards and the body 49 ribs 52 can also be set, to strengthen the intensity of wall portion 44.Flat part 42 offers opening 58 and wears for rotating shaft 38, and opening 58 is more a lot of greatly than opening of the prior art, to reduce the friction of 22 of carbon brush installation card 26 and metal partss.Opening 58 edges are provided with the lip 59 that extends vertically away from a side of metal parts 22, are used to strengthen the intensity of flat part 42.
Shown in Figure 2 is the schematic perspective view of end cap 20 inboards.Carbon brush 28 is the finger-like carbon brush; Has the damping portion 60 that rubber is processed; A side of being close to most of brush arm (except the commutator contact-segment); The end of brush arm is fixed to the plate-like portion 62 of motor terminal 30 base portions, and said plate-like portion 62 is fixed in carbon brush and installs in the draw-in groove of expansion section 55 of wall portion 44 of card 26 and pass draw-in groove.
Preferably, the outer surface 46 of wall portion 44 can be provided with some axially extended fins 53, so that wall portion 44 closely cooperates with shell 12.The end face 48 of wall portion 44 can be provided with some convex closures 54; Preferably; Said convex closure 54 is oval, when magnets of stator 13 can be used for biting magnet 13 for the said convex closure 54 of ferro-gum, to prevent magnet 13 rotations and better carbon brush to be installed and blocked 26 and be fixed to shell 12.
Said carbon brush is installed card 26 and is fixed to metal parts 22 through four fixed legs 56.Said carbon brush is installed card 26 can also be provided with some projections 64 at its outer surface 46, and said projection 64 cooperates the breach 66 of shell 12 openends 14, firmly is installed between metal parts 22 and the shell 12 thereby said carbon brush is installed card 26.Preferably, openend 14 inner surfaces of shell 12 are provided with step, and said end cap 20 is installed on the step place, thus but axial location end cap 20.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a motor comprises
Shell is equipped with magnet in the said shell, and said shell has an openend;
One rotor is installed in the shell, comprises rotating shaft, rotor core and is installed in commutator in the rotating shaft, is wound in the winding in the rotor core, and said winding is electrically connected with commutator;
End cap is installed on the openend of said shell, and said end cap comprises that metal parts and carbon brush install card; Said carbon brush is installed card and is provided with the carbon brush that pair of terminal and a pair of and said terminal are electrically connected, and wherein, said carbon brush installation blocks flat part vertical with rotating shaft and the wall portion of extending vertically from flat part of comprising; Said flat part is provided with the opening that supplies rotating shaft to pass, and said wall portion comprises outer surface, inner surface; End face; And the passage of the interior contact of a pair of confession carbon brush separating device entering carbon brush installation card carbon brush, it is characterized in that
Said passage runs through outer surface and the inner surface of said wall portion and away from said end face, thus make the end face of said wall portion above passage continuously.
2. motor according to claim 1 is characterized in that, said passage is the through hole that radially runs through outer surface and inner surface that is arranged at said wall portion.
3. motor according to claim 1 is characterized in that, said wall portion has the body that fixes with flat part, said passage be located at said body near the flat part place, and relative with the depression of being located at the flat part outer peripheral face.
4. motor according to claim 1 is characterized in that, the open circumferential of said flat part is extended with a lip along the direction away from metal parts.
5. motor according to claim 1 is characterized in that, the outer surface of said wall portion is provided with some fins that extend vertically, and said fin is replaced the inner surface of shell aperture end.
6. motor according to claim 1 is characterized in that, the end face of said wall portion is provided with some convex closures, said convex closure along motor shaft to an axial end of replacing said magnet.
7. motor according to claim 6 is characterized in that, said magnet is ferro-gum, and said convex closure part at least is conical, and inserts in the said magnet.
8. motor according to claim 1 is characterized in that, the outer surface that said carbon brush is installed card is provided with some projections, and said projection cooperates the breach of shell aperture end, firmly is installed between metal parts and the shell thereby said carbon brush is installed card.
9. motor according to claim 8 is characterized in that, the openend inner surface of said shell is provided with step, and said end cap is installed on said step place, thus but axial location end cap.
10. according to each described motor of claim 1 to 9, it is characterized in that said carbon brush is installed card and is made of plastics.
CN2009101338616A 2008-04-15 2009-03-27 Electric motor Active CN101562385B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0806762.1 2008-04-15
GB0806762A GB0806762D0 (en) 2008-04-15 2008-04-15 Electric motor

Publications (2)

Publication Number Publication Date
CN101562385A CN101562385A (en) 2009-10-21
CN101562385B true CN101562385B (en) 2012-10-03

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CN (1) CN101562385B (en)
DE (1) DE102009016841A1 (en)
GB (1) GB0806762D0 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1338142A (en) * 1999-11-25 2002-02-27 马渊马达株式会社 Small-sized motor
CN101106244A (en) * 2006-07-12 2008-01-16 日本电产三协株式会社 Motor with brush

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3706301B2 (en) 2000-10-31 2005-10-12 マブチモーター株式会社 Small motor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1338142A (en) * 1999-11-25 2002-02-27 马渊马达株式会社 Small-sized motor
CN101106244A (en) * 2006-07-12 2008-01-16 日本电产三协株式会社 Motor with brush

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP特开2002-218697A 2002.08.02

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Publication number Publication date
DE102009016841A1 (en) 2009-10-22
CN101562385A (en) 2009-10-21
GB0806762D0 (en) 2008-05-14

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C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20190927

Address after: 529000 Donghai Road 888, Jianghai District, Jiangmen City, Guangdong Province

Patentee after: Dechang Electric Machinery (Jiangmen) Co., Ltd.

Address before: Two new industrial village in Baoan District Shenzhen City manhole town of Guangdong Province in 518125

Patentee before: Dechang Electric Machinery (Shenzhen) Co., Ltd.

TR01 Transfer of patent right