EP0302985A2 - Porte-balai pour un balai de contact en charbon - Google Patents

Porte-balai pour un balai de contact en charbon Download PDF

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Publication number
EP0302985A2
EP0302985A2 EP88101240A EP88101240A EP0302985A2 EP 0302985 A2 EP0302985 A2 EP 0302985A2 EP 88101240 A EP88101240 A EP 88101240A EP 88101240 A EP88101240 A EP 88101240A EP 0302985 A2 EP0302985 A2 EP 0302985A2
Authority
EP
European Patent Office
Prior art keywords
housing
carbon
holder
longitudinal slot
face
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
Application number
EP88101240A
Other languages
German (de)
English (en)
Other versions
EP0302985A3 (en
EP0302985B1 (fr
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
Priority claimed from DE19873726894 external-priority patent/DE3726894A1/de
Application filed by Schunk Motorensysteme GmbH filed Critical Schunk Motorensysteme GmbH
Publication of EP0302985A2 publication Critical patent/EP0302985A2/fr
Publication of EP0302985A3 publication Critical patent/EP0302985A3/de
Application granted granted Critical
Publication of EP0302985B1 publication Critical patent/EP0302985B1/fr
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
    • H01R39/40—Brush holders enabling brush movement within holder during current collection

Definitions

  • the invention relates on the one hand to a holder according to the preambles of claims 1, 2, 9 and 10 and on the other hand to a method for mounting the holder according to the preamble of claim 11.
  • the coal which transmits electrical current from a stationary to a movable part, is to be guided in a resilient manner in the axial direction and in the transverse direction as free of play and rotation-proof as possible by a corresponding holder.
  • a strand emerging centrally from the rear surface of the grinding brush in the axial direction can be guided through the center of the spiral compression spring to the rear end of the housing and fastened there.
  • the length of the connecting wire is dimensioned so that the abrasive brush can be adjusted.
  • the threading of the flexible connecting strands into the spiral spring requires a certain skill, so that the production of this type of carbon holder is time-consuming and can only be automated with a large amount of equipment.
  • a holder is mounted in such a way that a carbon is inserted into the housing from the rear and then the connecting wire is positioned and fastened to the rear end of the housing. The spring is then inserted, held in place and finally locked in place by a counterholder.
  • the workflow is similar if the wire is threaded through the spring.
  • the connecting wire is attached to the rear end of the housing, which is opposite the exit of the carbon brush.
  • the free end of the connecting strand connected to the carbon brush has a contact element which is inserted on the end face between the spring and the housing.
  • the assembly of such a carbon holder is also time-consuming and not accessible to automation.
  • An object of the present invention is to provide a holder according to the preamble of claims 1, 2, 9 and 10 so that a simple assembly allows easy assembly of the individual parts with fully automatic assembly in large quantities, which should be ensured in particular that the strand can be securely fixed and that the housing has the required dimensional stability and thus mixed geometry.
  • a receptacle for strands runs over the longitudinal slot, which is automatically inserted into the receptacle when the coal is introduced. It is not required that the slot is continuous from the end face from which the coal is inserted into the housing. Rather, a web connecting the slot side surface can be provided in the region of the end face. As a result, the housing experiences a high degree of dimensional accuracy, so that the coal must be taken up with unnecessary play.
  • the wire is guided through the receptacle in the area of the end of the longitudinal slot during the assembly process and connected to it after the carbon has been completely introduced into the housing produced.
  • the attachment preferably consists of an open sleeve facing the longitudinal slot, which is crimped or welded to the stranded element.
  • the receptacle can be designed as an open sleeve and extend from two webs running on both sides of the longitudinal slot, a type of bridge being formed which ensures that the housing is not bent apart in an uncontrolled and unwanted manner in the area of the slot.
  • a type of bridge being formed which ensures that the housing is not bent apart in an uncontrolled and unwanted manner in the area of the slot.
  • This also ensures that the abrasive carbon is arranged almost free of play and exclusively axially displaceable within the housing.
  • the longitudinal slot extends over the entire length of the housing, there is the advantage that the carbon can be introduced from both end faces.
  • the dimensional accuracy of the housing is ensured by the fact that webs forming bridge-like guides are arranged on both end faces.
  • the rear end face of the housing has at least one movable element which changes the free cross section of the housing and which serves as a rear boundary for the spring element introduced into the housing.
  • the electrical connection of the housing is particularly simplified in that, in the area of the rear end of the housing, a projection extending from a side wall is designed as a plug. Usual receptacles can be plugged onto this connector.
  • the front limitation of the spring element takes place by changing the cross section of the housing, the spring element in the form of a helical spring partially projecting laterally over the grinding carbon and the housing showing at least one support for the compression spring at the end having the open end face.
  • a further embodiment provides for a projection such as an angle to be left on one edge of the longitudinal slot, which projection is bent over after the installation of carbon, braid and spring in such a way that it projects transversely into the open slot.
  • the stranded wire can then hang on the rear edge of the web, see above that the wear length of the coal is determined by the position of the web and is prevented that the remaining remainder and the spring come out of the guide after worn coal.
  • the above-described solution features ensure that the spring element can be positioned within the housing regardless of the presence of the abrasive carbon, it being possible to insert it from the rear of the housing when the preferably hook-shaped elements in the rear area have the cross-section of the Release the housing. As soon as the spring element is introduced, the elements, which can be sections of the side walls, are bent inwards, so that an uncontrolled sliding out of the spring element is no longer possible.
  • the housing made of sheet metal inevitably has a longitudinal joint.
  • This parting line is arranged in one of the side walls not having the longitudinal slot.
  • the dimensional accuracy of the housing is increased in that this parting line is dovetailed.
  • bending tabs are arranged at least on the rear end of the housing. These bending tabs can be arranged on both sides of the parting line, so that thereby a smooth parting line is held together via the board serving as the holder.
  • the invention relates to a holder for a carbon brush for in particular electric motors, comprising a preferably cuboid housing and the carbon brush arranged therein, which can be displaced in the axial direction, on which a spring element such as a coil spring acts in the fully assembled state, and is characterized in that the holder forms a preassembled unit with the coal, the coal being pushed into the holder from the front end, the wire automatically being inserted or threaded into the receptacle and clamped and / or welded there.
  • the proposal according to the invention accordingly provides a preassembled unit by means of which a fully automatic assembly can be facilitated.
  • a particular advantage is that the unit consisting of the housing and the coal can be stored, into which, if necessary, only the grinding carbon with the strand element can be inserted from the front of the housing in order to provide a fully functional carbon holder.
  • a method for assembling a holder for a carbon brush comprising a housing, a spring element and the carbon brush having a laterally projecting strand element is characterized in that the spring element is introduced into the rear of the housing in order to prevent the spring element from sliding out in an uncontrolled manner in the area of the rear end face at least one hook-shaped element is moved into the displacement path of the spring element, that the carbon is inserted from the front of the housing and locked by a releasable holding element, and that the stranded element is attached laterally to the housing.
  • the method is characterized in that the stranded element is guided through a longitudinal slot extending from an end face of the housing, in the area of which there is a fastening in which the stranded element is automatically inserted when the abrasive carbon is introduced, so that after the abrasive carbon has been fully inserted, the Fastening element is only connected to the stranded element, such as, for example, welding or crimping.
  • the figures show a holder (10) for carbon brushes (12) for in particular electric motors, which has a cuboid housing (14) in which the carbon brush (12) and a helical spring (16) are arranged to be axially displaceable.
  • the inner cross section of the housing (14) is adapted at least in sections to the cross section of the carbon brush (12) in order to enable guidance without play.
  • From the carbon brush (12), namely from its rear end (18) a current leads (20) for power supply, which is connected to a receptacle or fastening (24) to be described in more detail below at the front end (22) housing (14).
  • the longitudinal slot (30) which starts from the end face (32) of the housing (14) and has a length that is approximately the length of the unused carbon ( 12) corresponds. 7 and 8, the longitudinal slot (30) in the region of the end face (32) can be bridged by a web or bridge (77) following the contour of the wall (28) in order to ensure high dimensional stability.
  • the wall (28) and also the opposite wall (34) each have a bulge (36) or (38), which is at a distance from the front end (22) of the housing (14 ), i.e. to the front (32) ends.
  • the helical spring (16) can be moved freely in the region of the bulges (36) and (38).
  • the cross-sectional change of the housing (14) to the front end (22) results in a support for the helical spring (16), which limits its movement.
  • the bulges (36) and (38) the walls (28) and (34) in the edge regions (40), (42) and (44), (46) are still at a distance from the cross-section of the carbon brush (12 ) turned off, so that an almost play-free and exclusive axial displacement is guaranteed.
  • the helical spring (16) can be inserted into the housing (14) from the rear end side, that is to say from the rear side (48), into the region of the housing (14) which has the bulges (36) and (38). Subsequently, web-shaped sections (50), (52), (56) and (58) are bent towards one another in order to ensure that the helical spring (16) does not become uncontrolled can slide out of the housing (14).
  • the web-shaped sections (50), (52), (56) and (58) facing each other are preferably sections of the walls (28) and (34).
  • Fig. 8 further features to be emphasized are illustrated.
  • a projection such as an angle (41) which, after mounting coal, braid and spring, is bent in such a way that it projects into the slot (30) in such a way that there is on the rear edge of the web or projection (41) can hang the strand. Consequently, the position of the web (41) determines the length of wear of the coal and prevents the last remnant and the spring from coming out of the guide after the coal has been worn.
  • Fig. 8 Also shown in Fig. 8 is the bridge (77) bridging the slot (30) to ensure that the housing is not expanded unintentionally and unintentionally. Nevertheless, the strand (20) lies in the receptacle (24) after the coal (12) has been pushed into the housing (14). In this case, the strand (20) jumps through the slot due to its own tension and lies in the concave area of the receptacle (24) in order to be welded, soldered or the like there. Of course, this area of the receptacle must lie above the slot (30) so that the bridge (77) lies in relation to the end face (32) in front of the concave area of the receptacle (24).
  • the reference numeral (61) shows a dovetail-shaped parting line of the housing (14).
  • the holding element (64) In the upper wall (62) of the housing (14) there is also a holding element (64) by means of which the grinding carbon (12) can be held in a desired position, namely when the carbon is not displaced within the housing (14) shall be.
  • the holding element (64) has a section (66) protruding into the housing interior at the front end. As soon as the holding element (64) is bent outwards, only the helical spring (16) acts on the carbon brush (12), so that it can be displaced outwards, that is to say through the front end face (32).
  • the fastening (24) on the front end face (32) of the housing (14) is preferably designed as an open sleeve (68) facing the longitudinal slot (30), which extends from the wall (28).
  • Web-shaped sections (70) and (72) go out on both sides of the slot (30), initially run in the plane of the end face (32), and are then bent parallel to the wall (28) (section 74).
  • the section (74) then merges into the open sleeve (68), which can also be referred to as a "shoe”.
  • the free end of the strand (20) is then automatically inserted into the open sleeve (68) when the grinding carbon (12) is inserted into the housing (14) via the front end face (32).
  • the strand (20) can then move freely within the longitudinal slot (30) and automatically lies in the open sleeve (68). As soon as the abrasive carbon (12) is locked in place by the holding element (64), only the free legs (76) and (78) of the sleeve (68) need to be crimped or welded to the strand (20).
  • FIG. 7 differs from that of FIG. 1 in that a bridge serves as an attachment, which is formed by a bulged web (77) running over the longitudinal slot (30), which is formed by the longitudinal slot edges of the side wall designed as a spring belly going out.
  • the bridge can be seen at a distance from the front end of the housing (14). If a receptacle corresponding to that of FIG. 1 is added to the exemplary embodiment starting from the end face (32) and initially parallel to this and then running along the wall (36), a construction according to FIG. 8 is obtained.
  • FIG. 4 shows a holder (80) which has a longitudinal slot (84) which extends over the entire length of the housing (82).
  • a bridge-like connecting web (86) or (88) is arranged in the area of the front and rear end faces of the housing (82), which ensures the dimensional stability of the housing despite the continuous longitudinal slot.
  • FIG. 5 shows a holder (90), in the housing (92) of which a longitudinal slot (94) extending from the rear end face is arranged.
  • a bridge (96) extending to the side, the extension of which serves as a fastening (98) for receiving the strand extending from the grinding carbon.
  • FIG. 6 shows a holder (100), on the housing (102) of which flap-like angle pieces (106) and (108) extending from two opposite side walls are arranged, which are angled towards the center of the housing after insertion of the helical spring and so hold the coil spring in the housing.
  • a projection is arranged on one of the two other side walls, which has the shape of a plug (110).
  • the plug (11) is bent at right angles from the housing wall. It goes without saying that the plug (110) can also be arranged running in the axial direction of the housing or in any other direction.
EP88101240A 1987-08-12 1988-01-28 Porte-balai pour un balai de contact en charbon Expired - Lifetime EP0302985B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873726894 DE3726894A1 (de) 1986-08-13 1987-08-12 Halter fuer eine schleifkohle
DE3726894 1987-08-12

Publications (3)

Publication Number Publication Date
EP0302985A2 true EP0302985A2 (fr) 1989-02-15
EP0302985A3 EP0302985A3 (en) 1989-07-26
EP0302985B1 EP0302985B1 (fr) 1993-09-01

Family

ID=6333611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101240A Expired - Lifetime EP0302985B1 (fr) 1987-08-12 1988-01-28 Porte-balai pour un balai de contact en charbon

Country Status (2)

Country Link
EP (1) EP0302985B1 (fr)
DE (1) DE3883664D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547437A2 (fr) * 1991-12-14 1993-06-23 Licentia Patent-Verwaltungs-GmbH Dispositif de guidage de balais pour machines électriques
FR2760141A1 (fr) * 1997-02-25 1998-08-28 Valeo Systemes Dessuyage Unite de balai avec cage, balai et tresse pour machine electrique tournante, notamment motoreducteur d'essuie-glace de vehicule automobile
EP0874424A2 (fr) * 1997-04-24 1998-10-28 SCHUNK Motorensysteme GmbH Porte-balai pour balai en charbon
EP0929134A2 (fr) * 1998-01-12 1999-07-14 SCHUNK Motorensysteme GmbH Porte-balai pour balai en charbon

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1127114A (en) * 1965-03-02 1968-09-11 Stanley Works A brush gear for a commutating electrical machine
DE7715158U1 (fr) * 1977-05-12 1978-10-19 Siemens Ag, 1000 Berlin Und 8000 Muenchen
DE2733130A1 (de) * 1977-07-22 1979-02-01 Bosch Gmbh Robert Buerstenhalterung fuer elektrische maschinen
DE8110596U1 (de) * 1981-04-08 1981-10-01 Köster Technik GmbH & Co, 2875 Ganderkesee Litzenführung bei Bürstenhalter für elektr. Maschinen, insbesondere Kleinmotoren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1127114A (en) * 1965-03-02 1968-09-11 Stanley Works A brush gear for a commutating electrical machine
DE7715158U1 (fr) * 1977-05-12 1978-10-19 Siemens Ag, 1000 Berlin Und 8000 Muenchen
DE2733130A1 (de) * 1977-07-22 1979-02-01 Bosch Gmbh Robert Buerstenhalterung fuer elektrische maschinen
DE8110596U1 (de) * 1981-04-08 1981-10-01 Köster Technik GmbH & Co, 2875 Ganderkesee Litzenführung bei Bürstenhalter für elektr. Maschinen, insbesondere Kleinmotoren

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547437A2 (fr) * 1991-12-14 1993-06-23 Licentia Patent-Verwaltungs-GmbH Dispositif de guidage de balais pour machines électriques
EP0547437A3 (fr) * 1991-12-14 1994-01-05 Licentia Gmbh
FR2760141A1 (fr) * 1997-02-25 1998-08-28 Valeo Systemes Dessuyage Unite de balai avec cage, balai et tresse pour machine electrique tournante, notamment motoreducteur d'essuie-glace de vehicule automobile
EP0874424A2 (fr) * 1997-04-24 1998-10-28 SCHUNK Motorensysteme GmbH Porte-balai pour balai en charbon
EP0874424A3 (fr) * 1997-04-24 1999-06-16 SCHUNK Motorensysteme GmbH Porte-balai pour balai en charbon
EP0929134A2 (fr) * 1998-01-12 1999-07-14 SCHUNK Motorensysteme GmbH Porte-balai pour balai en charbon
EP0929134A3 (fr) * 1998-01-12 2001-05-23 SCHUNK Motorensysteme GmbH Porte-balai pour balai en charbon

Also Published As

Publication number Publication date
DE3883664D1 (de) 1993-10-07
EP0302985A3 (en) 1989-07-26
EP0302985B1 (fr) 1993-09-01

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