EP0291765B1 - Kohlehalteranordnung - Google Patents

Kohlehalteranordnung Download PDF

Info

Publication number
EP0291765B1
EP0291765B1 EP88107162A EP88107162A EP0291765B1 EP 0291765 B1 EP0291765 B1 EP 0291765B1 EP 88107162 A EP88107162 A EP 88107162A EP 88107162 A EP88107162 A EP 88107162A EP 0291765 B1 EP0291765 B1 EP 0291765B1
Authority
EP
European Patent Office
Prior art keywords
carbon brush
carrier plate
brush holder
holder arrangement
arrangement 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.)
Expired - Lifetime
Application number
EP88107162A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0291765A2 (de
EP0291765A3 (en
Inventor
Walter Köster
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schunk Motorensysteme GmbH
Original Assignee
Schunk Motorensysteme GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schunk Motorensysteme GmbH filed Critical Schunk Motorensysteme GmbH
Publication of EP0291765A2 publication Critical patent/EP0291765A2/de
Publication of EP0291765A3 publication Critical patent/EP0291765A3/de
Application granted granted Critical
Publication of EP0291765B1 publication Critical patent/EP0291765B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to coal holder arrangements according to the preambles of claims 1 and 4.
  • Charcoal holder arrangements for e.g. a universal electric motor for use in hand-held power tools has carbon holders arranged on a plastic support plate, which are connected to lead frames in order to then connect them to the phases of a power source.
  • a corresponding structure simplifies assembly, even if the separate fastening of the carbon holder, lead frame and the attachment of the electrical connections is quite time-consuming and therefore costly.
  • An arrangement is known from FR-A 2 582 872 in which a total of four interconnected carbon holders are arranged on a carrier plate made of circuit board material for printed circuits.
  • DE-U 82 08 364 describes a hood for an electric motor, two carbon holders being attached to a base surface of the hood serving as a support plate.
  • the object of the present invention is to design a carbon holder arrangement according to the preambles of claims 1 and 4 in such a way that the entire arrangement can be easily assembled, and in addition the possibility is to be created that the contacting problems arising from the connection of the carbon holder and busbar are avoided .
  • each carbon holder assigned to a specific electrical connection is arranged on a separate carrier plate.
  • An independent solution of a carbon holder arrangement for in particular DC motors comprising at least four carbon holders, at least one electrically insulating support plate and, if necessary, electrical connections which connect components for electrical interference suppression and have electrical connections in the form of preferably lead frames, each of which two carbon holders are connected in parallel to form a pair and diametrically to the engine longitudinal axis are arranged, that in each case the electrically connected carbon holder are arranged on a separate carrier plate.
  • the carbon holders which are to be connected to different electrical connections, are separated from one another and arranged on separate carrier plates, which in turn can be detachably connected, preferably plugged together.
  • the carbon holder plates can be detachably assembled by, for example, snap-in or plug-in connections, the electrical connections and components such as chokes or capacitors to be emphasized are only arranged on one of the coal holder plates. During assembly, it is then only necessary that the carbon holder plates are assembled and a single electrical connection z. B. is produced by soldering.
  • the invention is further characterized in that the carbon holder is punched and folded together with the circuit as a unit. This completely bypasses the problems that normally arise from connecting the holder to the electrical circuit without leaving the effect desired by the prior art of a four-carbon holder plate; because the carrier plates to be assembled act from the current supply as a four-carbon holder plate.
  • the possibly identical carrier plates have recesses through which the lead frame runs and in which the lead frame can be punched out.
  • the assembled carrier plates can have mutually associated recesses forming a type of pocket, into which a capacitor can be arranged which is to be connected in parallel with the busbars present on the carrier plates.
  • the carbon holders form a unit with the busbars, it is only necessary for the electric motor to function properly that the braid of the coal to be introduced into the carbon holder is welded to the holder, the connection being designed as a notch from the carbon holder.
  • the respective busbar to be arranged on a carrier plate runs two symmetrically to a plane in which the longitudinal axis of the electric motor lies preferably has an L-shaped leg, which are connected by a bridge.
  • the legs run essentially parallel or perpendicular to the plane, with the carbon holders arranged diametrically to the longitudinal axis extending from the legs running perpendicular to the plane.
  • busbars run in recesses provided in the carrier plates, whereas the carbon holders are supported on surfaces of the carrier plate which run offset to the planes spanned by the busbars.
  • the teaching of the invention essentially gives the advantages that the carbon holder and busbar form a part as a lead frame and can be assembled as a unit.
  • the busbar can easily be equipped with interference suppression elements or not.
  • the carrier plates themselves can be provided with a large number of free spaces, since there is little space required to fasten the busbars with carbon holders. This has the advantage that air can pass through the carrier plates in the axial direction of the motor, so that good cooling is ensured. Since the carbon holder with the busbar forms a rigid unit, the assembly of the plastic carrier plate can be integrated directly into the manufacturing process for the carbon holder or busbars. This eliminates the additional handling of brass parts and plastic parts.
  • the carrier plates themselves preferably comprise struts constructed in the manner of a truss, which can have a U-shaped or semicircular arch shape in section.
  • the struts can be covered by an outer skin.
  • the carbon holder is punched together with the circuit as a unit from a sheet metal strip, it is possible to close the holder in the middle and, if necessary, to provide it with feet which are in corresponding recesses in the Carrier plate are inserted and bent to ensure secure attachment.
  • the holder can optionally also be designed with dovetail teeth for firm locking on the carrier plate.
  • Embodiments of the invention result from the claims and the features to be extracted from them - individually and / or in combination.
  • Fig. 1 is a plan view of a carrier plate (10) made of plastic, which is disc-shaped, wherein one half - in the embodiment, the left half (12) - wheel-shaped and the right half (14) below in more detail Descriptive stiffeners and depressions to receive a busbar (16) designed as a lead frame with carbon holders (18) and (20).
  • the busbar (16) and the carbon holder (18) and (20) are punched out as a unit from preferably sheet metal material and then folded to the desired extent.
  • the integral carbon holders (18) and (20) are assigned to a collector, not shown, of an electric motor.
  • the carbon holders (18) and (20) are arranged diametrically to the longitudinal axis of the electric motor, the center of which is indicated by the reference number (22).
  • a plane (24) runs through the longitudinal axis (22) and consequently penetrates the drawing perpendicularly.
  • the busbar (16) now has two sections (28) and (30) which are connected to one another via a bridge (26) and which consist of legs (32) and (34) or (34) or which run parallel or perpendicular to the plane (24). Assemble (36) and (38).
  • the legs form an approximately L-shape, the carbon holders (18) and (20) extending from the legs (36) and (38) running perpendicular to the plane (24).
  • the bridge (26) is designed as a web and is preferably angled at right angles from the plane spanned by the sections (28) and (30).
  • the carbon holders (18) and (20) are also arranged offset to the plane formed by the sections (28) and (30), in fact opposite to the bridge (26).
  • a section (40) extends from the leg (34) and serves as a connection to a power source.
  • the carbon holders (18) and (20) have connecting tabs or feet (42) and (44).
  • the flag (44) is adjacent to the section to be folded to the step (46) and the flag (42) is at the right outer end.
  • the carbon holder (18) is formed by folding the sheet metal material in a clockwise direction, the closing of the holder (18) or (20) in the central region (48) or (50) on the upper one not closest to the step (46) specified area takes place. This results in a high tolerance accuracy of the guide for the coals to be introduced into the coal holders (18) and (20).
  • the feet which are provided in FIG. 3 with the reference numerals (42) and (44), are of course in each case on the end faces of the carbon holders in order to corresponding slots (52) and (54) or recesses (56) and (58) introduced into the carrier plate (14) and then bent over on the back of the carrier plate, in order to enable a positional fixation.
  • the outer side surfaces (600) and (620) of the carbon holder (18) and (20) are provided with notches that serve as connections (640) and (660) for the carbon strands, not shown.
  • the connection is preferably carried out by welding.
  • the carrier plate (12) consists of plastic and is disk-shaped. So that in the exemplary embodiment the right part (14) can accommodate the lead frame (16) with the integrated carbon holders (18) and (20) (the lead frame (16) according to FIG. 2 must be placed on the part (14) upside down) is the following Structure chosen. Corresponding to the course of the sections (28) or (30) of the lead frame (16), the part (16) has L-shaped regions (60) and (62) which result from the sections (64), (66) , (68) or (70), (72) and (74).
  • Recesses (76), (78), (80) or (82), (84) and (86) are provided between these, in order to subsequently retrofit the lead frame (16) introduced into sections (60) and (62) to be punched out in certain areas in order to then connect the sections of the lead frame via components which lead to interference suppression.
  • the areas (88) and (90) shown in dashed lines in FIG. 2, which lie above the openings (84) and (78), can be punched free, in order then to adjoin the adjacent areas of the sections (28) and (30). to connect the lead frame (16) with throttles, not shown.
  • the areas (60) and (62) are recessed in relation to the edges (116), (118) and (1200), (1220) surrounding them. This is to be clarified in the illustration by the fact that the inwardly offset sections (64), (66), (68) or (70), (72) and (74) are cross-hatched and this is at the height of the circumferential edge (92) of the support plate (10) extending boundary walls (116), (118), (1200) and (1220) are identified by a simple line hatching.
  • the bridge (26) which is designed as an angled web, is introduced into a slot (94) and then bent over on the back of the carrier plate (10). The fixation of the carbon holders (18) and (20) via feet (42) and (44) takes place accordingly.
  • a fastening eye (96) designed as a ring and on the other hand a pocket (108), (110).
  • a wall (98) Arranged diametrically to the fastening eye (96) is a wall (98), which is drawn with a more dashed line and protrudes from the plane formed by the edge (92) and whose inner diameter corresponds to the outer diameter of the fastening eye (96).
  • the carrier plate (10) shown is now assembled with an identically designed carrier plate, a wall of the other carrier plate corresponding to the wall (98) encompasses the eye (96), whereas a corresponding eye of the other carrier plate from the wall (98) of the carrier plate ( 10) is surrounded.
  • projections (100) and (102) designed as snap hooks are provided, which engage corresponding recesses in the recesses (104) and (106) when assembled with a counter-carrier plate and capture the second carrier plate (not shown) on the rear side in order to ensure that the ones to be assembled a carbon holder assembly forming a four-carbon holder plate forms a unit.
  • the carrier plate (10) there is also a recess (110) surrounded by a wall (108) which serves as the mentioned pocket for a capacitor to be inserted, which is parallel to the lead frame (16) of the carrier plate (10) and the carrier plate is arranged, which is arranged in the carrier plate (10) to be assigned to the carrier plate.
  • the pockets formed from the wall (108) and (110) come to lie on top of each other.
  • the identically constructed carrier plate must be assigned to the carrier plate (10) in mirror image and rotated by 90 °.
  • the backs of the carrier plates must be placed on top of one another and rotated by 90 °, so that on the one hand the fastening eyes interact with the associated walls and the locking projections with the corresponding recesses offset by 90 °.
  • the carbon holders (18) and (20) come to lie on surfaces (112) and (114) which run in a plane which is spanned by the edge (12) of the carrier plate (10).
  • FIGS. 4 and 5 show a coal holder arrangement which is particularly noteworthy and which comprises a first carrier plate (120) and a second carrier plate (122) associated therewith.
  • the carrier plate (120) is disc-shaped and cuboid in plan view and is provided with a large number of openings in order to offer the possibility of adequate ventilation of the electric motor.
  • Carbon holders (126) and (128), which are electrically connected in parallel, are arranged on a diagonal of the carrier plate (120) diametrically to the longitudinal axis of the electric motor indicated by the reference number (124).
  • the connection between the carbon holders (126) and (128) takes place via a conductor track (130) designed as a lead frame, which together with the coal holders (126) and (128) have been punched and folded as a unit from sheet metal material.
  • a conductor track (130) designed as a lead frame
  • the carrier plate (122) receives the second carbon holders (132) and (134), which are also connected in parallel. The connection between these is also made via a lead frame (136).
  • the carrier plate (122) is detachably assembled with the carrier plate (120) via preferably plug-in or snap-in connections. For this go e.g. from the carrier plate (120) locking lugs, which can snap into corresponding recesses in the carrier plate (122). Corresponding elements are indicated by way of example with the reference symbols (138) and (140). The connection is made in such a way that the distance between the carrier plates (120) and (122) is ensured to the extent necessary.
  • the carrier plate (122) Since the carrier plate (122) only receives the carbon holders (132), (134) and the lead frame (136), their geometry is selected accordingly. This means that the carrier plate (122) essentially consists of two holding surfaces (142) and (144) which are connected via a bridge (146) corresponding to the geometry of the conductor track (136). Since the conductor track (136) has approximately a U-shape with outer legs directed away from one another, the geometry of the bridge (146) is accordingly selected.
  • the carbon holders (126) and (128) and (132) and (134) with the lead frame (130) and (136) connecting them are identical. Furthermore, the carrier plate (120) is provided with the electrical connections and the interference suppression means, whereas the carrier plate (122) has only the carbon holders (132) and (134) with the mesh (136).
  • the connection on the carrier plate (120) is illustrated in connection with FIG. 7.
  • the carrier plate (120) has two electrical connections (148) and (150), to which a capacitor (152) is connected in parallel. From the connection (148) then goes out an interference choke (158) which is connected to the carbon holders (126) and (128) connected in parallel via the lead frame (130).
  • Another suppression choke (160) is connected to the other electrical connection (150). All of these elements are arranged on the carrier plate (120). The free connection of the suppression choke (160) is then e.g. connected by soldering to a connecting lug (162) of the lead frame (136), so that in this way the electrical connection to the lead frame (136) and thus to the carbon holders (132) and (134) is established.
  • a corresponding construction makes recognizable an extremely simple assembly possible, since the carrier plates are only put together and then e.g. must be soldered via the connection lug (162).
  • the carrier plates (120) and (122) are to be assembled, it is therefore only necessary that the carrier plate (122) is folded out of the drawing plane and placed on the carrier plate. The electrical connection between the terminal lug (162) and the interference suppression choke (160) can then take place.
  • the ribs of the carrier plates (120) and (122) or the carrier plate (10) can be designed in the manner of a framework. This is to be illustrated by the section along the line VI-VI in FIG. 4, which is shown in an enlarged representation in FIG. 6. It can be seen that the carrier plate ribs consist of intersecting struts, which are provided with the reference numerals (164) and (166) by way of example. The struts can be arched and covered by an outer skin (168). Another framework-like structure is of course also possible. Appropriate construction results in considerable weight savings without sacrificing load-bearing capacity.

Landscapes

  • Motor Or Generator Frames (AREA)
  • Motor Or Generator Current Collectors (AREA)
EP88107162A 1987-05-16 1988-05-04 Kohlehalteranordnung Expired - Lifetime EP0291765B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3716504 1987-05-16
DE19873716504 DE3716504A1 (de) 1987-05-16 1987-05-16 Kohlehalteranordnung

Publications (3)

Publication Number Publication Date
EP0291765A2 EP0291765A2 (de) 1988-11-23
EP0291765A3 EP0291765A3 (en) 1989-07-05
EP0291765B1 true EP0291765B1 (de) 1992-06-17

Family

ID=6327740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107162A Expired - Lifetime EP0291765B1 (de) 1987-05-16 1988-05-04 Kohlehalteranordnung

Country Status (2)

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EP (1) EP0291765B1 (enrdf_load_html_response)
DE (2) DE3716504A1 (enrdf_load_html_response)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4232692B4 (de) * 1991-10-02 2006-07-13 Schunk Motorensysteme Gmbh Kohlehalteranordnung sowie Montieren einer solchen
DE4226553A1 (de) * 1992-08-11 1994-02-17 Teves Gmbh Alfred Bürstenhalter für Elektromotoren
DE19705833A1 (de) * 1997-02-15 1998-08-20 Itt Mfg Enterprises Inc Bürstenhalteanordnung
DE19749457C2 (de) * 1997-11-10 2002-01-24 Schunk Motorensysteme Kohlehalteranordnung
DE102004041485A1 (de) * 2004-08-27 2006-03-02 Robert Bosch Gmbh Bürstenhalter für eine elektrische Maschine

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1240738A (en) * 1916-08-14 1917-09-18 North East Electric Co Brush-mounting.
US1923864A (en) * 1930-12-27 1933-08-22 Electric Service Supplies Co Brush plate assembly
US2324299A (en) * 1942-10-14 1943-07-13 Gen Electric Brush rigging
US2463097A (en) * 1946-12-23 1949-03-01 Brown Brockmeyer Co Brush holder
FR2175666B1 (enrdf_load_html_response) * 1972-03-17 1977-04-01 Ducellier & Cie
FR2389253A1 (fr) * 1977-04-27 1978-11-24 Ducellier & Cie Porte-balais pour machines electriques, telles que demarreur de vehicules automobiles
IT8121340U1 (it) * 1981-03-31 1982-10-01 Fiamm Componenti Access S P A Gruppo porta-spazzola per motori elettrici per avvisatori acustici di autoveicoli e simili
DE3149099A1 (de) * 1981-12-11 1983-06-16 SWF-Spezialfabrik für Autozubehör Gustav Rau GmbH, 7120 Bietigheim-Bissingen Buerstenhalter fuer eine elektrische maschine
EP0175992B1 (de) * 1984-09-19 1988-05-11 Siemens Aktiengesellschaft Verfahren zur Herstellung einer Bürstenhalterung einer Kommutatormaschine
FR2582872B1 (fr) * 1985-05-30 1987-08-21 Peugeot Aciers Et Outillage Plaque porte-balais perfectionnee pour moteur electrique et son procede de fabrication
DE3538940A1 (de) * 1985-10-31 1987-05-07 Black & Decker Inc Verdrahtungsanordnung fuer den motor eines elektrowerkzeugs

Also Published As

Publication number Publication date
DE3716504A1 (de) 1988-12-01
EP0291765A2 (de) 1988-11-23
DE3872048D1 (de) 1992-07-23
DE3716504C2 (enrdf_load_html_response) 1990-08-16
EP0291765A3 (en) 1989-07-05

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