CN204030871U - Contact structures stablized by a kind of brush-commutated device for brush motor - Google Patents
Contact structures stablized by a kind of brush-commutated device for brush motor Download PDFInfo
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- CN204030871U CN204030871U CN201420412034.7U CN201420412034U CN204030871U CN 204030871 U CN204030871 U CN 204030871U CN 201420412034 U CN201420412034 U CN 201420412034U CN 204030871 U CN204030871 U CN 204030871U
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- brush
- end finger
- volute spring
- block
- contact structures
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Abstract
The utility model discloses a kind of brush-commutated device for brush motor and stablize contact structures, comprise commutator, brush box, brush and volute spring, described brush is placed in brush box, brush box is arranged on brush rack plate, described volute spring is arranged on brush box by end finger assembly, described end finger assembly is made up of back-up block and end finger, wherein back-up block is fixed on brush top end face, described end finger is connected by rivet shaft with back-up block, the utility model by adding end finger assembly in volute spring structure, volute spring masterpiece is made to be used in the end finger side of end finger assembly, make in wear of brush process, brush stress point position is substantially constant, brush stress point angle direction is substantially constant, the job stability of brush assembly of electric can be improved.
Description
Technical field
The utility model belongs to brush motor technical field, relates to a kind of brush-commutated device for brush motor and stablizes contact structures.
Background technology
In existing carbon brush component, carbon brush acts directly on commutator by scroll spring, along with after the prolongation of machine operation time, wear of brush, brush height slowly shortens, force application angle and the force application location of volute spring are changing always, therefore the stress point on brush and Impact direction also change along with the force application angle change of spring, thus negative effect is created to the stability of brush work, affect motor useful life and job stability.
Utility model content
For solving the problem, the utility model provides a kind of brush-commutated device for brush motor and stablizes contact structures.
The utility model is achieved by following technical solution.
Contact structures stablized by a kind of brush-commutated device for brush motor, comprise commutator, brush box, brush and volute spring, described brush is fixed on commutator, brush box is arranged on brush, described volute spring is arranged on brush by end finger assembly, described end finger assembly is made up of back-up block and end finger, and wherein back-up block is fixed on brush top end face, and described end finger is connected by rivet shaft with back-up block.
Described end finger is provided with the mounting disc for fixing volute spring.
Described end finger and back-up block are for being flexibly connected.
The beneficial effects of the utility model are:
Compared with prior art, the utility model by adding end finger assembly in volute spring structure, and make volute spring masterpiece be used in the end finger side of end finger assembly, make in wear of brush process, brush stress point position is substantially constant; Brush stress point angle direction is substantially constant; The job stability of brush assembly of electric can be improved.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the structural representation of end finger assembly in the utility model.
In figure: 1-commutator, 2-brush box, 3-brush, 4-end finger assembly, 5-volute spring, 41-rivet shaft, 42-back-up block, 43-end finger, 431-mounting disc.
Embodiment
The technical solution of the utility model is further described below in conjunction with accompanying drawing, but described in claimed scope is not limited to.
As shown in Figure 1, contact structures stablized by a kind of brush-commutated device for brush motor described in the utility model, comprise commutator 1, brush box 2, brush 3 and volute spring 5, described brush 3 vertically acts on commutator 1, brush 3 is arranged on brush box 2, and described volute spring 5 acts on brush 3 by end finger assembly 4, and described end finger assembly 4 is made up of back-up block 42 and end finger 43, wherein back-up block 42 is fixed on brush 3 top end face, and described end finger 43 is connected by rivet shaft 41 with back-up block 42.
Described end finger 43 is provided with the mounting disc 431 for fixing volute spring 5.Can ensure that the elastic force of volute spring 5 acts on end finger 43 side of end finger assembly 4 like this, after preventing brush 3 from wearing and tearing, the force application angle of volute spring 5 and force application location change.
Described end finger 43 and back-up block 42 are for being flexibly connected.Such back-up block freely can rotate within the specific limits around rivet shaft 41 front, rear, left and right four direction.
In technique scheme, because back-up block 42 has two degree of freedom activity spaces, thus can ensure that it is vertically pressed in brush 3 top end face always, and substantially remain unchanged along with the shorten application point of rear support of abrasion electrical brush 3 short transverse of brush 3, therefore adopt structure described in the utility model can ensure brush 3 height certain limit in stress point and Impact direction remain unchanged, guarantee is provided to the steady operation of brush 3.
Claims (3)
1. stablize contact structures for the brush-commutated device of brush motor for one kind, comprise commutator (1), brush box (2), brush (3) and volute spring (5), described brush (3) is vertically pressed on commutator (1), brush (3) is arranged on brush box (2), it is characterized in that: described volute spring (5) acts on brush (3) by end finger assembly (4), described end finger assembly (4) is made up of back-up block (42) and end finger (43), wherein back-up block (42) is fixed on brush (3) top end face, described end finger (43) is connected by rivet shaft (41) with back-up block (42).
2. contact structures stablized by a kind of brush-commutated device for brush motor according to claim 1, it is characterized in that: described end finger (43) is provided with the mounting disc (431) for fixing volute spring (5).
3. contact structures stablized by a kind of brush-commutated device for brush motor according to claim 1, it is characterized in that: described end finger (43) and back-up block (42) are for being flexibly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420412034.7U CN204030871U (en) | 2014-07-24 | 2014-07-24 | Contact structures stablized by a kind of brush-commutated device for brush motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420412034.7U CN204030871U (en) | 2014-07-24 | 2014-07-24 | Contact structures stablized by a kind of brush-commutated device for brush motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204030871U true CN204030871U (en) | 2014-12-17 |
Family
ID=52070698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420412034.7U Active CN204030871U (en) | 2014-07-24 | 2014-07-24 | Contact structures stablized by a kind of brush-commutated device for brush motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204030871U (en) |
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2014
- 2014-07-24 CN CN201420412034.7U patent/CN204030871U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |