CN104753259A - Brush assembly - Google Patents
Brush assembly Download PDFInfo
- Publication number
- CN104753259A CN104753259A CN201310737411.4A CN201310737411A CN104753259A CN 104753259 A CN104753259 A CN 104753259A CN 201310737411 A CN201310737411 A CN 201310737411A CN 104753259 A CN104753259 A CN 104753259A
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- CN
- China
- Prior art keywords
- brush
- brushes
- holder
- hole
- spring
- 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.)
- Pending
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- Motor Or Generator Current Collectors (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention relates to the technical field of a DC motor and particularly relates to a brush assembly. The brush assembly comprises brushes, a brush rack, brush holders and constant-force springs, and the brush holders are arranged on the brush rack. The brush assembly is characterized in that the cross section of the brush rack is cone-shaped, the brushes are provided with through holes, the through holes are communication holes which penetrate using surfaces of the brushes and surfaces opposite to the using surfaces, the brush holders are provided with slide grooves, a clamping support is fixed to two outer side positions of an inner end of each brush holder, each constant-force spring is a double-scroll coil spring with two ends provided with scrolls, middle parts of the constant-force springs abut against outer ends of the brushes, the middle segment of each spring and the outer end of the corresponding brush are sleeved in the slide groove of the corresponding brush holder, and two ends of each spring are supported by the corresponding clamping support. According to the brush assembly, the service life of the brushes is effectively prolonged, and the noise of the motor is reduced.
Description
Technical field
The present invention relates to DC motor technical field, particularly a kind of brush mount component.
Background technology
Permanent magnet DC motor all comprises brush and commutator, but traditional brush holder is horizontal arrangement, this structure makes the restriction of effective length by motor inner space of brush, the contact-making surface of brush and commutator is not ideal enough, in motor operation course, high speed relative motion between brush and commutator, produce friction noise and frictional heat, the commutation spark of big current accelerates the wearing and tearing of brush, the excessive abrasion of brush, not only can affect motor can normally run, also will directly affect the useful life of motor.
Summary of the invention
For above-mentioned technical problem, the invention provides a kind of brush mount component, by changing traditional horizontal brush holder into taper brush holder, improve the contact area of brush and commutator, and use the two scrollwork disc spring of constant force, in machine operation, brush thrust is consistent, steadily, improve the utilization rate of brush, multiple through hole is provided with in brush inside, through hole is run through the use face of brush and the connecting hole of opposite thereof, effectively reach dispersion noise, improve the brush porosity, suppress discharge spark, thus reduce the consumption of brush, improve the useful life of brush, reduce the noise of motor.
Realize technical scheme of the present invention as follows:
Brush assembly of electric, comprises brush, brush holder, brush carrier and constant force spring, brush carrier is arranged on brush holder, and the cross section of described brush holder is tapered, described brush is provided with through hole, through hole is run through the use face of brush and the intercommunicating pore of opposite thereof, and described brush carrier is provided with chute, and Kato is fixed on two outside lefts of brush carrier the inner, constant force spring is two scrollwork disc springs that two ends are provided with scrollwork, support brush outer end in the middle part of it, and be together inserted in brush carrier chute, two ends scrollwork support by Kato holder.
Described pair of scrollwork disc spring adopts the strip material of thickness 0.03 ~ 0.1mm.
Describedly on brush, be provided with 1-20 through hole.
The shape of cross section of described through hole for circular, oval, polygon and cross section face connect as 0.5-1.5mm
2.
Adopt such scheme, the present invention is a kind of brush mount component, cross section is adopted to be the brush holder of taper, improve the contact area of brush and commutator, improve the useful life of brush, the two scrollwork disc spring of described employing constant force, at motor at work, is consistent to brush thrust, steadily, the utilization rate of effective raising brush and useful life, because brush inside is provided with multiple through hole, noise can be disperseed, improve the porosity of brush, suppress discharge spark, reduce brush consumption, improve the useful life of brush and play the effect of noise reduction.
Accompanying drawing explanation
By the detailed description below in conjunction with accompanying drawing, aforesaid and other object, the feature and advantage of the present invention will become apparent.Wherein:
Fig. 1 is the front view of structure of the present invention.
Fig. 2 is the enlarged drawing in I region in Fig. 1.
Fig. 3 is the structural representation of brush of the present invention.
Fig. 4 is left view of the present invention.
In figure, 1 is brush, and 2 is brush holder, and 3 is brush carrier, and 4 is Kato, and 5 is constant force spring, and 6 is scrollwork, and 7 is through hole.
Embodiment
As shown in the figure: the invention provides a kind of brush assembly of electric, comprise brush holder 2, brush carrier 3, brush 1 and constant force spring 5, and Kato 4, the brush carrier 3 being provided with chute is fixed on brush holder 2, the cross section of described brush holder 2 is taper, taper brush carrier makes the contact area of brush 1 and commutator be increased, in limited motor internal space, add the effective length of brush 1, extend the useful life of motor, two described Katos 4 are fixed on two outside lefts of brush carrier 3 the inner, constant force spring 5 is adopt thickness to be two scrollwork disc springs that the spring steel band of 0.05mm rolls, two ends are provided with scrollwork 5a, support its outer end of brush 1 in the middle part of it and be together inserted in from the inner notch of brush carrier 3 chute, two ends scrollwork 5a support by Kato 4 holder in brush carrier both sides, use the two scrollwork disc spring of constant force, in machine operation process, brush 1 is consistent, stable thrust, described brush 1 is provided with through hole 7, through hole 7 is the intercommunicating pore that through brush 1 uses face and opposite thereof, brush 1 is provided with 1-20 through hole 7, the cross section of described through hole 7 is circular, oval, polygon, its cross-sectional area is 0.5-1.5 square millimeter, in brush 1, arrange through hole 7 can reach dispersion and to make an uproar the direction of propagation of province, increase the propagation ducts of noise, thus reach the object reducing noise, the porosity of the raising brush 1 that described through hole 7 is relative, the increase of effective suppression discharge spark, reduce the abrasion of brush 1, use the present invention greatly can improve the useful life of brush 1, reduce the noise of motor.
The present invention is not limited to described embodiment, and those skilled in the art, not departing from spirit of the present invention namely openly in scope, still can do some and revise or change, therefore the scope that the scope of the present invention limits with claims is as the criterion.
Claims (4)
1. brush assembly of electric, comprise brush, brush holder, brush carrier and constant force spring, brush carrier is arranged on brush holder, it is characterized in that: the cross section of described brush holder is tapered, described brush is provided with through hole, through hole is run through the use face of brush and the intercommunicating pore of opposite thereof, and described brush carrier is provided with chute, and Kato is fixed on two outside lefts of brush carrier the inner, constant force spring is two scrollwork disc springs that two ends are provided with scrollwork, support brush outer end in the middle part of it, and be together inserted in brush carrier chute, two ends scrollwork support by Kato holder.
2. brush assembly of electric according to claim 1, is characterized in that: described pair of scrollwork disc spring adopts the strip material of thickness 0.03 ~ 0.1mm.
3. brush assembly of electric according to claim 1, is characterized in that: on brush, be provided with 1-20 through hole.
4. brush assembly of electric according to claim 1, is characterized in that: the shape of cross section of through hole for circular, oval, polygon and cross section face connect as 0.5-1.5mm
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310737411.4A CN104753259A (en) | 2013-12-27 | 2013-12-27 | Brush assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310737411.4A CN104753259A (en) | 2013-12-27 | 2013-12-27 | Brush assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104753259A true CN104753259A (en) | 2015-07-01 |
Family
ID=53592506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310737411.4A Pending CN104753259A (en) | 2013-12-27 | 2013-12-27 | Brush assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104753259A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366577A (en) * | 2015-10-23 | 2016-03-02 | 哈尔滨工业大学 | Spring, cam and torsion bar type constant force mechanism |
| CN105978239A (en) * | 2015-03-13 | 2016-09-28 | 株式会社电装 | Direct current motor |
| CN111525747A (en) * | 2019-02-02 | 2020-08-11 | 罗伯特·博世有限公司 | Electric machine |
-
2013
- 2013-12-27 CN CN201310737411.4A patent/CN104753259A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978239A (en) * | 2015-03-13 | 2016-09-28 | 株式会社电装 | Direct current motor |
| CN105978239B (en) * | 2015-03-13 | 2019-04-19 | 株式会社电装 | Dc motor |
| CN105366577A (en) * | 2015-10-23 | 2016-03-02 | 哈尔滨工业大学 | Spring, cam and torsion bar type constant force mechanism |
| CN111525747A (en) * | 2019-02-02 | 2020-08-11 | 罗伯特·博世有限公司 | Electric machine |
| CN111525747B (en) * | 2019-02-02 | 2024-04-09 | 罗伯特·博世有限公司 | Motor with a motor housing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150701 |
|
| WD01 | Invention patent application deemed withdrawn after publication |