GB2207296A - Brush gear for an electric motor - Google Patents
Brush gear for an electric motor Download PDFInfo
- Publication number
- GB2207296A GB2207296A GB08717064A GB8717064A GB2207296A GB 2207296 A GB2207296 A GB 2207296A GB 08717064 A GB08717064 A GB 08717064A GB 8717064 A GB8717064 A GB 8717064A GB 2207296 A GB2207296 A GB 2207296A
- Authority
- GB
- United Kingdom
- Prior art keywords
- brush
- terminal part
- supporting
- arm
- gear according
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/38—Brush holders
- H01R39/39—Brush holders wherein the brush is fixedly mounted in the holder
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Current Collectors (AREA)
- Motor Or Generator Frames (AREA)
- Dc Machiner (AREA)
Abstract
The brush gear comprises two brush arms (10, 11) and a brush arm support (12). Each arm (10, 11) comprises two electrically conductive strips forming, respectively, a terminal part (14) and a more resilient brush supporting part (15). The terminal part comprises two portions (14a and 14b) extending at an acute angle with respect to one another. Only the portion (14a) of each terminal part is supported by the support (12) and the brush supporting part (15) is secured to the portion (14b) of the terminal part (14) on the side thereof distal from the portion (14a). In use the brush supporting part (15) is urged against the free edge of the portion (14b) of the terminal part (14) when a brush (18) supported by the brush supporting part is in contact with a commutator. <IMAGE>
Description
Brush gear for an electric motor
This invention relates to brush gear for an electric motor and to an electric motor equipped with such brush gear.
According to the present invention there is provided brush gear for an electric motor, comprising a brush arm and means supporting the brush arm, the brush arm comprising two electrically conductive strips forming, respectively, a terminal part and a more resilient brush supporting part, the terminal part comprising first and second portions extending at an acute angle with respect to one another, wherein only the first portion of the terminal part is supported by the brush arm supporting means, and wherein the brush supporting part of the brush arm is secured to the second portion of the terminal part on the side thereof distal from the first portion, the arrangement being such that in use the brush supporting part is urged against the free edge of the second portion of the terminal part when a brush supported by the brush supporting part is in contact with a commutator.
Preferably, the first portion of the terminal part has a dimple formed therein and the dimpled region of the first portion of the terminal part is located in a groove in the brush arm supporting means.
Conveniently, the first portion of the terminal part has a transversely extending projection which is located in an aperture in the brush arm supporting means and the free end of the projection is splayed out to hold the projection captive in said aperture.
Preferably, the second portion of the terminal part and the brush supporting part are secured together by one or more upset rivets.
The invention will now be more particularly described, by way of example, with reference to the accompanying drawing, in which:
Figure 1 is a plan view of one embodiment of brush gear according to the present invention, and
Figure 2 is an exploded sectional view of part of the brush gear of Figure 1, taken along line II-II.
Referring to the drawing, the brush gear shown therein comprises two brush arms 10 and 11 and a brush arm support 12 in the form of an end cap, typically of nylon, which closes the end of a drawn can-like casing of a p.m.d.c. motor.
Each brush arm 10, 11 comprises a terminal part 14 of, for example, brass and a more resilient brush supporting part 15 of, for example, beryllium copper. The terminal part 14 has two portions 14a and 14b extending at an acute angle ct~ with respect to one another. The brush supporting part 15 is secured to the portion 14b of the terminal part 14 on the side thereof distal from the portion 14a by one or more upset rivets 16 and, preferably, in addition by a projection 17 which extends from one side of the portion 14b and which is bent over and crimped about the brush supporting part 15. A carbon brush 18 is supported by the free end of part 15 in conventional manner.
When the brush 18 is in contact with a commutator (not shown) the part 15 is urged against the free edge of the portion 14b of the terminal part 14 which edge defines a fixed fulcrum for the part 15 with respect to the part 14.
The portions 14a of the two brush arms 10 and 11 are supported by the support 12 in longitudinal alignment with one another. Each portion 14a has a dimple 19 formed therein and the dimpled region of each portion 14a is located in a respective groove 20 in the support 12. In addition, in order to firmly secure the brush arms relative to the support 12, each portion 14a has a transversely extending projection 21 which is located in an aperture 22 in the support 12 and which has a bifurcated free end 23 which is splayed out after insertion into the aperture 22 to hold the projection 21 captive in the aperture 22.
As only the portions 14a are trapped with respect to the support 12 the brush arms 10, 11 have a large free length.
The above embodiment is given by way of example only and various modifications will be apparent to persons skilled in the art without departing from the scope of the invention as defined by the appended claims.
Claims (10)
1. Brush gear for an electric motor, comprising a brush arm and means supporting the brush arm, the brush arm comprising two electrically conductive strips forming, respectively, a terminal part and a more resilient brush supporting part, the terminal part comprising first and second portions extending at an acute angle with respect to one another, wherein only the first portion of the terminal part is supported by the brush arm supporting means, and wherein the brush supporting part of the brush arm is secured to the second portion of the terminal part on the side thereof distal from the first portion, the arrangement being such that in use the brush supporting part is urged against the free edge of the second portion of the terminal part when a brush supported by the brush supporting part is in contact with a commutator.
2. Brush gear according to claim 1, wherein the first portion of the terminal part has a dimple formed therein and wherein the dimpled region of the first portion of the terminal part is located in a groove in the brush arm supporting means.
3. Brush gear according to claim 1 or claim 2, wherein the first portion of the terminal part has a transversely extending projection which is located in an aperture in the brush arm supporting means and wherein the free end of the projection is splayed out to hold the projection captive in said aperture.
4. Brush gear according to any one of claims 1 to 3, wherein the second portion of the terminal part and the brush supporting part are secured together by one or more upset rivets.
5. Brush gear according to claim 4, wherein the second portion of the terminal part or the brush supporting part has a transversely extending projection which is bent over and crimped about the other part.
6. Brush gear according to any one of the preceding claims, comprising two brush arms supported by the brush arm supporting means with the first portions of the terminal parts longitudinally aligned.
7. Brush gear according to any one of the preceding claims, wherein the brush arr: supporting means is provided on an end cap of an electric motor.
8. Brush gear substantially as hereinbefore described with reference to the accompanying drawing.
9. An electric motor equipped with brush gear according to any one of the preceding claims.
10. The motor of claim 9 in the form of a p.m.d.c.
micromotor.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08717064A GB2207296A (en) | 1987-07-20 | 1987-07-20 | Brush gear for an electric motor |
| JP8895088U JPS6416161U (en) | 1987-07-20 | 1988-07-04 | |
| CN88208841U CN2049038U (en) | 1987-07-20 | 1988-07-18 | Brush mechanism for motor |
| DE8809302U DE8809302U1 (en) | 1987-07-20 | 1988-07-20 | Brush holder for an electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08717064A GB2207296A (en) | 1987-07-20 | 1987-07-20 | Brush gear for an electric motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8717064D0 GB8717064D0 (en) | 1987-08-26 |
| GB2207296A true GB2207296A (en) | 1989-01-25 |
Family
ID=10620951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08717064A Withdrawn GB2207296A (en) | 1987-07-20 | 1987-07-20 | Brush gear for an electric motor |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS6416161U (en) |
| CN (1) | CN2049038U (en) |
| DE (1) | DE8809302U1 (en) |
| GB (1) | GB2207296A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8087977B2 (en) | 2005-05-13 | 2012-01-03 | Black & Decker Inc. | Angle grinder |
| US10818450B2 (en) | 2017-06-14 | 2020-10-27 | Black & Decker Inc. | Paddle switch |
| DE102017213083A1 (en) * | 2017-07-28 | 2019-01-31 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Electric motor with a brush holder formed by a leaf spring element |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1560557A (en) * | 1975-08-13 | 1980-02-06 | Bosch Gmbh Robert | Brush holder and brush arrangement for electrical machines |
| GB2184612A (en) * | 1985-11-28 | 1987-06-24 | Mabuchi Motor Co | Miniature electric motor brush gear |
-
1987
- 1987-07-20 GB GB08717064A patent/GB2207296A/en not_active Withdrawn
-
1988
- 1988-07-04 JP JP8895088U patent/JPS6416161U/ja active Pending
- 1988-07-18 CN CN88208841U patent/CN2049038U/en not_active Withdrawn
- 1988-07-20 DE DE8809302U patent/DE8809302U1/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1560557A (en) * | 1975-08-13 | 1980-02-06 | Bosch Gmbh Robert | Brush holder and brush arrangement for electrical machines |
| GB2184612A (en) * | 1985-11-28 | 1987-06-24 | Mabuchi Motor Co | Miniature electric motor brush gear |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8809302U1 (en) | 1988-11-17 |
| GB8717064D0 (en) | 1987-08-26 |
| JPS6416161U (en) | 1989-01-26 |
| CN2049038U (en) | 1989-12-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6394858B1 (en) | Socket contact for electrical connectors | |
| JP3037819B2 (en) | Electrical terminals and housings for electrical devices containing such terminals | |
| US5679034A (en) | Construction of retaining resilient contact piece in female electrical connection member | |
| US4685887A (en) | Electrical connector arrangement with a short-circuit bridge | |
| GB2124836A (en) | Electrical connectors | |
| JPH0324036B2 (en) | ||
| US4329612A (en) | Brushholder | |
| US5135417A (en) | Dual usage electrical/electronic pin terminal system | |
| EP0852412A3 (en) | Connector for flat cables | |
| US5112244A (en) | Terminal connector | |
| GB2226709A (en) | Terminal arrangement for an electric motor | |
| US4373773A (en) | Socket type contact assembly | |
| US4254353A (en) | Brush holder | |
| GB2207296A (en) | Brush gear for an electric motor | |
| JPH10200277A (en) | Contact member | |
| US3937995A (en) | High voltage grounding strap | |
| EP0261839B1 (en) | Spring contact electrical connector assembly | |
| US6902413B1 (en) | High retention connection | |
| US4968270A (en) | Spring bulb socket | |
| US2708740A (en) | Wire connector | |
| US5561409A (en) | Holder for an electrical safety fuse | |
| US7232775B1 (en) | Connector body for a lead attachment retrofit arrangement | |
| US4472016A (en) | Terminal block connector | |
| WO1990016098A1 (en) | Connection terminals for rigid-wire loop cartridge light bulbs | |
| GB2207010A (en) | A brush arm for an electric motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |