CN1203594C - Constant pressure carbon brush hold-down device for electric machine - Google Patents
Constant pressure carbon brush hold-down device for electric machine Download PDFInfo
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- CN1203594C CN1203594C CN 02131332 CN02131332A CN1203594C CN 1203594 C CN1203594 C CN 1203594C CN 02131332 CN02131332 CN 02131332 CN 02131332 A CN02131332 A CN 02131332A CN 1203594 C CN1203594 C CN 1203594C
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- carbon brush
- electric machine
- constant pressure
- down device
- hold
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 72
- 230000000295 complement effect Effects 0.000 claims description 4
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
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Abstract
The present invention relates to a constant pressure carbon brush hold-down device for an electric machine, which belongs to the design field of structure components of electromechanical products, particularly to the design field of the structure components of an electric machine. The aim of the present invention is to solve the problem that a carbon brush of a direct current electric machine needs basically keeping constant pressure in a wear process. The present invention discloses a constant pressure carbon brush hold-down device for an electric machine, which comprises the carbon brush and elastic components, wherein the carbon brush is placed in a brush holder. The present invention is characterized in that the elastic components are supporting springs, and each supporting spring comprises a spiral spring coil body; both ends of each spring coil body respectively extend out with a rotating arm; the lengths of the two rotating arms are same; the end parts of the two rotating arms are provided with locating structures which are supported on the tail part of the carbon brush and an electric machine body. When the present invention is used on the direct current electric machine, efficiency can be enhanced, noises and heating values can be reduced, and the service life of the electric machine can be greatly prolonged.
Description
Technical field
A kind of constant pressure carbon brush hold-down device for electric machine belongs to electronic product structural member design field, relates in particular to the structural member design field of motor.
Background technology
The direct current machine branch has brush and brushless electric machine two big classes, and brush class direct current machine is wherein arranged, and is the commutation that realizes electric current that contacts by carbon brush and commutator.For guarantee that carbon brush kept in touch with commutator all the time in wearing and tearing, generally need a kind of spring of device at the carbon brush afterbody, in the carbon brush wear process, spring promotes carbon brush all the time and withstands commutator face forward, guarantees that electric current is unimpeded.
Traditional brush holder spring has two kinds of spiral stage clip and spiral torsion springs.All there is common shortcoming in the type of action of these two kinds of springs, (new carbon brush) and last (carbon brush may wear at last) when promptly initial, and great changes have taken place for the suffered spring pressure of carbon brush.Change in order to reduce pressure, only way is the drift of lengthening spring, but this is difficult to realize in the restriction of most of occasions owing to structure.Even extended drift slightly, the last pressure of its initial sum still has 3-4 difference doubly.
For motor, this pressure has an optimum value.Excessive pressure can cause frictional resistance excessive, and electric efficiency reduces, and heating increases, and noise increases, a series of problems such as carbon brush wearing and tearing quickening; Phenomenons such as pressure is too small then may to cause loose contact, and appearance sparking and rotary speed unstabilization are fixed cause above-mentioned variety of issue equally.
Summary of the invention
The objective of the invention is to keep constant problem substantially, a kind of constant pressure carbon brush hold-down device for electric machine is provided in order to solve the carbon brush pressure requirement in wear process of direct current machine carbon brush.
For achieving the above object, technical scheme provided by the invention is as follows:
A kind of constant pressure carbon brush hold-down device for electric machine, comprise the carbon brush and the elastic component that are placed in the brush carrier, it is characterized in that described elastic component is a support spring, described support spring contains spiral helicine spring coil body, one pivoted arm is respectively stretched out at the two ends of spring coil body, article two, the equal in length of pivoted arm, the end of described two pivoted arms has location structure, and is supported on respectively on carbon brush afterbody and the motor body.
The location structure of two of support spring pivoted arm ends is respectively towards the bent angle of carbon brush and motor body in the constant pressure carbon brush hold-down device for electric machine.
Has the pit that the location structure with described two pivoted arm ends is complementary in the constant pressure carbon brush hold-down device for electric machine on the afterbody of carbon brush and the motor body respectively.
Described constant pressure carbon brush hold-down device for electric machine can also comprise collets, and described collets are fixed on the motor body, and the end of two pivoted arms of described support spring is supported on respectively on carbon brush afterbody and the described collets.The location structure of two pivoted arm ends of described support spring is respectively towards the bent angle of carbon brush and collets.Has the pit that the location structure with described two pivoted arm ends is complementary on the afterbody of described carbon brush and the collets respectively.
The experiment of the present invention on certain direct current machine shows that under same service condition, working life has prolonged 2-3 doubly, has realized the efficient raising, and noise reduces, and heating descends, the effect that the life-span prolongs greatly.
Description of drawings
Fig. 1 is the carbon brush hold down gag schematic diagram of employing helical compression spring formula spring of the prior art.
Fig. 2 is the carbon brush hold down gag schematic diagram of the spiral torsion spring of employing of the prior art.
Fig. 3 is the schematic diagram of an embodiment of constant pressure carbon brush hold-down device for electric machine of the present invention.
Fig. 4 is the schematic diagram of another kind of embodiment of the present invention.
Embodiment
Figure 1 shows that the carbon brush hold down gag schematic diagram of employing helical compression spring formula spring of the prior art, helical compression spring 6 places brush carrier 5 supporting the afterbody of carbon brush 4, and carbon brush can slide in brush carrier, and its head contacts with commutator 3 on the rotor.Carbon brush lead-in wire 7 links to each other with carbon brush 4, and it is the passage of electric current input and output.
Figure 2 shows that the carbon brush hold down gag schematic diagram of the spiral torsion spring of employing of the prior art, an end of torsion spring 8 withstands the afterbody of carbon brush 4, and the other end of torsion spring 8 is fixed by torsion spring frame 9.
Above-mentioned two kinds of schemes of the prior art, in the process of carbon brush wearing and tearing, the suffered pressure of carbon brush changes greatly, can produce a series of problems.
A kind of embodiment of the present invention as shown in Figure 3, constant pressure carbon brush hold-down device for electric machine comprises the carbon brush that is placed in the brush carrier 54 and the support spring of constant pressure can be provided.Carbon brush lead-in wire 7 links to each other with carbon brush 4, and it is the passage of electric current input and output.The head and the commutator on the DC motor rotor 3 of carbon brush 4 contact.The spring coil body 1 of support spring is that the shape coiling makes in the shape of a spiral, and pivoted arm 2 is respectively stretched out at the two ends of spring coil body, and support spring is in free state; Bent angle on the two pivoted arm ends withstands the pit of carbon brush 4 afterbodys and the pit on the motor body 10 respectively.The bent angle of pivoted arm end, the effect of the pit on carbon brush afterbody and the motor body are to make the position of support spring pivoted arm end in stretching process be difficult for slippage.
Operation principle of the present invention is described as follows: be in the support spring of free state, carbon brush 4 and motor body 10 produced simultaneously two pressure of opposite sign but equal magnitude.In the course of work of direct current machine, carbon brush 4 is wearing and tearing gradually, and two arms of support spring can strut thereupon gradually; Support spring carries out freely stretching, and it to the pressure that carbon brush produces small variation only takes place in bigger working range.May wear at last until carbon brush, pressure still keeps constant substantially (＜10% variation).
Another embodiment of the present invention also has collets 11 as shown in Figure 4 in the constant pressure carbon brush hold-down device for electric machine, collets 11 are fixed on the motor body 10, and the bent angle of support spring two pivoted arm ends withstands the pit of carbon brush 4 afterbodys and the pit on the collets 11 respectively.
The present invention is not limited to above-mentioned execution mode, makes Any shape and structural variation all belongs to the scope of protection of the invention on members such as support spring pivoted arm end, carbon brush afterbody.
Claims (6)
1. constant pressure carbon brush hold-down device for electric machine, comprise the carbon brush and the elastic component that are placed in the brush carrier, it is characterized in that described elastic component is a support spring, described support spring contains spiral helicine spring coil body, one pivoted arm is respectively stretched out at the two ends of spring coil body, article two, the equal in length of pivoted arm, the end of described two pivoted arms has location structure, and is supported on respectively on carbon brush afterbody and the motor body.
2. constant pressure carbon brush hold-down device for electric machine according to claim 1, the location structure of two pivoted arm ends that it is characterized in that described support spring is for respectively towards the bent angle of carbon brush and motor body.
3. constant pressure carbon brush hold-down device for electric machine according to claim 2 is characterized in that having respectively on the afterbody of described carbon brush and the motor body pit that the location structure with described two pivoted arm ends is complementary.
4. constant pressure carbon brush hold-down device for electric machine according to claim 1, it is characterized in that described constant pressure carbon brush hold-down device for electric machine also comprises collets, described collets are fixed on the motor body, and the end of two pivoted arms of described support spring is supported on respectively on carbon brush afterbody and the described collets.
5. constant pressure carbon brush hold-down device for electric machine according to claim 4, the location structure of two pivoted arm ends that it is characterized in that described support spring is for respectively towards the bent angle of carbon brush and collets.
6. constant pressure carbon brush hold-down device for electric machine according to claim 5 is characterized in that having respectively on the afterbody of described carbon brush and the collets pit that the location structure with described two pivoted arm ends is complementary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02131332 CN1203594C (en) | 2002-09-29 | 2002-09-29 | Constant pressure carbon brush hold-down device for electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02131332 CN1203594C (en) | 2002-09-29 | 2002-09-29 | Constant pressure carbon brush hold-down device for electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1402384A CN1402384A (en) | 2003-03-12 |
| CN1203594C true CN1203594C (en) | 2005-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02131332 Expired - Fee Related CN1203594C (en) | 2002-09-29 | 2002-09-29 | Constant pressure carbon brush hold-down device for electric machine |
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| Country | Link |
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| CN (1) | CN1203594C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403859A (en) * | 2010-09-07 | 2012-04-04 | 马渊马达株式会社 | Dc motor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386949C (en) * | 2005-11-25 | 2008-05-07 | 清华大学 | Changable type carbon brush case for disc electric motor |
| JP5462785B2 (en) * | 2008-03-28 | 2014-04-02 | マブチモーター株式会社 | DC motor |
-
2002
- 2002-09-29 CN CN 02131332 patent/CN1203594C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403859A (en) * | 2010-09-07 | 2012-04-04 | 马渊马达株式会社 | Dc motor |
| CN102403859B (en) * | 2010-09-07 | 2015-06-10 | 马渊马达株式会社 | Dc motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1402384A (en) | 2003-03-12 |
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| CF01 | Termination of patent right due to non-payment of annual fee |