GB2302998A - Commutated electric motor having brushes mounted by circuit board. - Google Patents
Commutated electric motor having brushes mounted by circuit board. Download PDFInfo
- Publication number
- GB2302998A GB2302998A GB9611408A GB9611408A GB2302998A GB 2302998 A GB2302998 A GB 2302998A GB 9611408 A GB9611408 A GB 9611408A GB 9611408 A GB9611408 A GB 9611408A GB 2302998 A GB2302998 A GB 2302998A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electric motor
- carrier board
- motor according
- brush
- guide rails
- 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.)
- Granted
Links
- 239000004020 conductor Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 239000012799 electrically-conductive coating Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- 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
- H01R39/383—Brush holders characterised by the electrical connection to the brush holder
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/66—Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedances or switches
-
- 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
- H02K5/148—Slidably supported brushes
Description
1 Mechanically commutated electric motor
Background art
2302998 The invention proceeds from a mechanically commutated electric motor according to the preamble of claim 1. A mechanically commutated electric motor is already known (WO 84/00645) which, for brush holding purposes, comprises guide rails which are constructed on a carrier board and engage into corresponding guide slots of the brushes. The carrier board is equipped to hold a total of two brushes which are contacted in each case by means of a separate shunt.
Furthermore, from DE 42 15 446 A1 a brush holder of a mechanically commutated electric motor is known, which comprises a cartridge-type brush-holder support formed on a printed-circuit board. Electrical coupling of the brushes is effected by a separate connection to the printed conductors of the printed-circuit board.
Advantages of the invention In contrast, the electric motor according to the invention having the characterizing features of claim 1 has the advantage that separate components for contacting the brushes are not needed. Thus, in comparison, a simplified construction of the brush holder is possible.
By virtue of the measures indicated in the dependent claims, advantageous developments and improvements of the electric motor indicated in claim 1 are possible.
2 Drawings Two embodiments of the invention are illustrated in the drawings and explained in detail in the following description. Of the drawings, Figure 1 is a projection of a printed-circuit board designed to hold brushes and Figure 2 shows a further embodiment of a brush holder.
Description of the embodiments
Figure 1 shows a carrier board 9 designed as a brush holder 8. The carrier board 9 takes the form of a printed-circuit board and is provided with a plurality of electronic components (not shown in detail), which are interconnected by printed conductors 10. The carrier board 9 is provided with a recess 11, which is delimited by two limbs 12, 13 and is approximately rectangular in shape. Holes 14, 15 which are open towards the recess 11 have been made, e.g. blanked, in the limbs 12, 13 and each form a location opening, which is likewise rectangular in shape, for brushes 16, 17. The opposing edge regions of each of the holes 14, 15 form guide rails 18a, b which, when brushes 16, 17 are inserted into the associated location opening, engage into corresponding guide slots 19a, b of the brushes 16, 17. The distance between the guide rails 18a, b is so dimensioned that in each case one brush 16, 17 may be received in a longitudinally displaceable manner between the guide rails 18a, b in the holes 14, 15.
In the bottom half of the view of Figure 1, a brush 17 is shown inserted into the associated hole 15. Seated between the brush 17 and a bottom end 20 of the hole 15 is a spiral spring 21 which, with a spring force, loads the brush 17 in the direction of a commutator 22 of an electric motor, which commutator takes the form of a rotor and is indicated only in a cutout manner. In the top half of the view of Figure 1, the brush 16 is shown prior to insertion into the hole 14. It may be seen that a guide projection 23 for the spiral spring 21 is 3 provided at the bottom end 20 of the hole 14 in the carrier board 9.
For contacting the brushes 16, 17, the guide rails 18a, b are provided with an electrically conductive coating 24. It is particularly advantageous to apply the coating 24 simultaneously with the printed conductors 10 onto the carrier board 9. To said end, the coating 24 is made of the same material as the printed conductors 10, e.g. of copper. In said case, contacting of the brushes 16, 17 is effected by means of the electrically conductive coatings 24. Because of the rotational movement of the commutator 22, the brushes 16, 17 are tilted in accordance with the guidance play of the guide rails 18 in the guide slots 19 so that there is always an electrically conductive contact between the coating 24 and the brushes 16, 17. The arrangement of the carrier board 9 with the brush holder 9 is effected approximately in a plane formed by an axis of rotation 25 of the commutator 22 and a line 26 perpendicular to said axis of rotation 25. The arrangement of the carrier board 9 may however in principle alternatively be effected at right angles to the axis of rotation 25, i.e. offset through 900 relative thereto. The recess 11 in the carrier board 9 is radially widened by a cutout 11a for receiving, for example, a shaft bearing.
Figure 2 shows a second embodiment of a spring 21. Compared to the first embodiment, parts which are identical or have an identical effect are denoted by the same reference numerals. Instead of a spiral spring, an elastic element 27 is provided which is approximately wave-form in shape. Manufacture of the elastic element 27 is oossible, for example, by appropriate blanking of the hole 14 out of the carrier board 9 made of conventional printed-circuit board material, e.g. fibrereinforced plastic material. The elastic element 27 is deformable in the direction of displacement of the brush 16 and is prestressed upon insertion of the brush 16 into the hole 14. Provision of such an elastic element 27 instead of a 4 spiral spring is particularly advantageous in cases where no high brush wear is to be expected and hence no great spring excursions arise throughout the service life of the electric motor.
Claims (1)
- Claims1. Mechanically commutated electric motor having a brush holder (8), which comprises guide rails (18a, b) formed on at least one carrier board (9) and extending in each case in pairs parallel to one another, each pair of guide rails (18a, b) forming between them a location opening for a brush (16, 17) and being designed for longitudinally guiding engagement into corresponding guide slots (19a, b) of the brush (16, 17), characterized in that the guide rails (18a, b) are designed so as to be at least superficially electrically conductive for contacting of the brush (16, 17).2. Electric motor according to claim 1, characterized in that the carrier board (9) in the form of a printedcircuit board is provided with electronic components which are interconnected by printed conductors (10).Electric motor according to claim 2, characterized in that an electrically conductive coating (24) is applied onto the carrier board (9) in the region of the guide rails (18), said coating being connected to printed conductors (10) on the carrier board (9) and being used for electrical contacting of the brushes (16, 17).4. Electric motor according to one of claims 2 to 4, characterized in that the carrier board (9) is provided with two diametrically opposing holes (14, 15) for receiving in each case one brush (16, 17).6 Electric motor according to one of the preceding claims, characterized in that the guide rails (18a, b) in each case lie approximately in a plane formed by an axis of rotation (25) of a commutator (22) of the electric motor and a line (26) perpendicular to said axis of rotation (25).Electric motor according to claim 5, characte'rized in that the recess (11) in the carrier board (9) is radially widened by a cutout (11a) for receiving a shaft bearing.7. Electric motor according to claim 1, characterized in that the brushes (16, 17) are loaded in the direction of a commutator (22) in each case by a spring (21) which is supported on the carrier board (9).8. Electric motor according to claim 7, characterized in that the spring (21) is formed by an elastic element (27), which is approximately waveform in shape and is formed on the carrier board (9) at the bottom (20) of a hole (14, 15).9. An electric motor substantially as herein described with reference to the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19523899A DE19523899B4 (en) | 1995-06-30 | 1995-06-30 | Mechanically commutated electric motor |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9611408D0 GB9611408D0 (en) | 1996-08-07 |
| GB2302998A true GB2302998A (en) | 1997-02-05 |
| GB2302998B GB2302998B (en) | 1997-09-10 |
Family
ID=7765706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9611408A Expired - Fee Related GB2302998B (en) | 1995-06-30 | 1996-05-31 | Mechanically commutated electric motor |
Country Status (6)
| Country | Link |
|---|---|
| CN (1) | CN1068715C (en) |
| CH (1) | CH691099A5 (en) |
| DE (1) | DE19523899B4 (en) |
| FR (1) | FR2738683B1 (en) |
| GB (1) | GB2302998B (en) |
| IT (1) | IT1284055B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10026176A1 (en) * | 2000-05-26 | 2002-01-10 | Schleifring Und Appbau Gmbh | Holding and contacting device for sliding contacts; PCB brush block |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4501983A (en) * | 1978-01-01 | 1985-02-26 | Papst Motoren Kg | Electric machine |
| EP0258132A1 (en) * | 1986-08-22 | 1988-03-02 | Valeo Termico S.A. | Brush holder device for a rotary electric machine, and electric machine equipped with such a brush holder device |
| EP0474904B1 (en) * | 1990-09-12 | 1994-07-27 | Siemens Aktiengesellschaft | Gear drive assembly for a commutator motor, in particular window raising drive for an automotive vehicle, and method for its manufacture |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE400613C (en) * | 1924-08-20 | Siemens Schuckertwerke G M B H | Zigzag spring stressed under pressure with arches at the turning points, especially for brush holders for electrical machines | |
| US2763800A (en) * | 1954-04-28 | 1956-09-18 | Gen Electric | Current collector contact means |
| EP0024121B1 (en) * | 1979-08-10 | 1983-10-12 | LUCAS INDUSTRIES public limited company | Dynamo electric machine brush assembly |
| FR2530877A1 (en) * | 1982-07-22 | 1984-01-27 | Marchal Equip Auto | BRUSH HOLDER AND ELECTRIC MOTOR PROVIDED WITH SUCH A BRUSH HOLDER |
| ES2048388T3 (en) * | 1990-10-24 | 1994-03-16 | Siemens Ag | COLLECTOR RING MOTOR OR COLLECTOR MOTOR. |
| IT1247211B (en) * | 1991-05-14 | 1994-12-12 | Alberto Frigo | PERFECTED COLLECTOR ROTATING ELECTRIC MACHINE |
| DE4232692B4 (en) * | 1991-10-02 | 2006-07-13 | Schunk Motorensysteme Gmbh | Carbon holder assembly and mounting such |
| DE4323413C2 (en) * | 1993-07-13 | 1997-01-30 | Atlanta Elektrosysteme Gmbh & | Contact device for a carbon brush |
-
1995
- 1995-06-30 DE DE19523899A patent/DE19523899B4/en not_active Expired - Fee Related
-
1996
- 1996-02-16 CH CH00411/96A patent/CH691099A5/en not_active IP Right Cessation
- 1996-05-31 GB GB9611408A patent/GB2302998B/en not_active Expired - Fee Related
- 1996-06-21 IT IT96MI001268A patent/IT1284055B1/en active IP Right Grant
- 1996-06-25 CN CN96110502A patent/CN1068715C/en not_active Expired - Fee Related
- 1996-06-28 FR FR9608089A patent/FR2738683B1/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4501983A (en) * | 1978-01-01 | 1985-02-26 | Papst Motoren Kg | Electric machine |
| EP0258132A1 (en) * | 1986-08-22 | 1988-03-02 | Valeo Termico S.A. | Brush holder device for a rotary electric machine, and electric machine equipped with such a brush holder device |
| EP0474904B1 (en) * | 1990-09-12 | 1994-07-27 | Siemens Aktiengesellschaft | Gear drive assembly for a commutator motor, in particular window raising drive for an automotive vehicle, and method for its manufacture |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1068715C (en) | 2001-07-18 |
| CN1146649A (en) | 1997-04-02 |
| ITMI961268A1 (en) | 1997-12-21 |
| ITMI961268A0 (en) | 1996-06-21 |
| FR2738683B1 (en) | 2000-05-19 |
| CH691099A5 (en) | 2001-04-12 |
| DE19523899A1 (en) | 1997-01-02 |
| FR2738683A1 (en) | 1997-03-14 |
| GB9611408D0 (en) | 1996-08-07 |
| IT1284055B1 (en) | 1998-05-08 |
| GB2302998B (en) | 1997-09-10 |
| DE19523899B4 (en) | 2007-01-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20100531 |