EP0791236A1 - Commutateur enfichable et son procede de production - Google Patents

Commutateur enfichable et son procede de production

Info

Publication number
EP0791236A1
EP0791236A1 EP96928428A EP96928428A EP0791236A1 EP 0791236 A1 EP0791236 A1 EP 0791236A1 EP 96928428 A EP96928428 A EP 96928428A EP 96928428 A EP96928428 A EP 96928428A EP 0791236 A1 EP0791236 A1 EP 0791236A1
Authority
EP
European Patent Office
Prior art keywords
segments
hub body
grooves
commutator
oversize
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
EP96928428A
Other languages
German (de)
English (en)
Other versions
EP0791236B1 (fr
Inventor
Helmut Stolpmann
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.)
Kirkwood Industries GmbH
Original Assignee
Kautt and Bux Commutator GmbH
Kirkwood Industries 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 Kautt and Bux Commutator GmbH, Kirkwood Industries GmbH filed Critical Kautt and Bux Commutator GmbH
Priority to SI9630208T priority Critical patent/SI0791236T1/xx
Publication of EP0791236A1 publication Critical patent/EP0791236A1/fr
Application granted granted Critical
Publication of EP0791236B1 publication Critical patent/EP0791236B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/06—Manufacture of commutators
    • 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
    • H01R39/14—Fastenings of commutators or slip-rings to shafts

Definitions

  • the invention relates to a plug-in commutator, which has the features of the preamble of claim 1, and a method for its production, which has the features of the preamble of claim 15.
  • the invention is therefore based on the object of providing a plug-in commutator in which the segments are reliably positioned in the grooves despite a reduced force for inserting the segments into the grooves.
  • This object is achieved by a plug-in commutator with the features of claim 1, an oversize also being understood to mean an undersize causing a clamping force.
  • a method for producing the plug-in commutator according to the invention is the subject of claim 15.
  • Advantageous embodiments of the plug-in commutator according to the invention and the manufacturing method according to the invention are the subject of the dependent claims.
  • the grooves in the end section which receives the leading end of the segments when inserted, and the segments in their trailing end section have the required oversize.
  • the segments can then be inserted into the grooves with very little force until the leading end reaches the oversized end section of the grooves and the trailing end section of the segments enters the grooves.
  • the axial extent of the zones having the oversize can be different. Both a larger axial extension in the area of the leading end section of the segments when inserting them and also in the area of their trailing end come into question. In one embodiment, the axial extent of the zones having the oversize in the area of the leading end section is approximately 15% and in the area of the trailing end section is approximately 5% of the length of the part of the segments forming the brush track.
  • the segments between their head part forming the brush tread and a foot part have a central part which widens like a wedge from the head part to the foot part and is clamped between the flanks of the assigned groove. Thanks to the wedge shape of this central part, the clamping force acting on the flanks of the central part has a radial component which presses the surfaces of the segments provided for radial positioning against the surfaces of the hub body assigned to them.
  • the width of the head part of the segments measured in the circumferential direction of the commutator is greater than the corresponding width of the middle part at the end adjoining the head part and the segments at the transition from the middle part to If the head part has a shoulder on both sides, which overlaps the immediately adjacent webs of the hub body that laterally delimit the grooves, the segments can be positioned radially by pressing these shoulders against the surface areas of the webs facing them.
  • the foot part of each segment following the wider end of the middle part, has a reduced width in a first section, forming a step in the region of both flanks, and a larger section in a second section adjoining the first section compared to the first section Spread to form a step in the area of both flanks.
  • the foot part thus has a T-like cross-sectional profile.
  • the middle part of the segments preferably lies over the entire surface of the flanks of the receiving groove.
  • the shoulders of the segments present at the transition from the middle part to the head part on the end faces of the webs, it is also possible to provide the end face of the foot part facing away from the head part under pressure on the base of the groove receiving the segment for the purpose of radial positioning. It is particularly advantageous to provide the latter system in the region of the trailing end of the segments and the system of the shoulders on the end faces of the webs in the region of the leading end.
  • the segments for anchoring have at least two pairs of contact surfaces. The angles between the pairs are preferably different for each pair. This ensures that all contact surfaces lie against the webs despite manufacturing tolerances.
  • the segments are first inserted into a basket, which specifies the positioning when the segments are inserted into the grooves.
  • This basket is then inserted into an injection or pressing tool after the segments have been inserted and is pressed or co-injected.
  • the plastic basket can only be used once.
  • the basket is dispensed with in the method according to the invention, in which the clamping force is determined solely by the excess in the area of the end sections of the segments and / or the material part of the hub body which serves to support the segments. The exact positioning is done by the areas that are not oversized. The clamping force that builds up at the end of the insertion process no longer influences this positioning.
  • the elimination of the basket there is both a saving in material and a shortening of the production process by the steps of loading and removing the basket.
  • By eliminating the basket it is also possible that the hooks serving for the electrical connection of the segments are already bent in the tool during the manufacture of the segments. The bending step is eliminated.
  • the pressure and, if appropriate, the temperature when inserting the segments are selected such that a largely indissoluble press connection does not arise between the hub body and segments, but rather that the hub body and the segments can be separated from one another again.
  • a plug-in commutator manufactured using such a method can thus be recycled.
  • 1 is an end view of the first embodiment, 2 shows a section along the line II - II of FIG. 1,
  • FIG. 3 shows an enlarged section of FIG. 2
  • FIG. 6 shows a cross section corresponding to FIG. 5 of the first exemplary embodiment in the region of the trailing end section of the segments
  • FIG. 7 shows an enlarged and incomplete cross section of the second exemplary embodiment in the region of the trailing end section of the segments.
  • a plug-in commutator has a hub body 1 made of electrically insulating material, which is provided with grooves 2, which are uniformly distributed over its circumference, have the same design and extend in the axial direction and are open radially outwards. As can be seen in FIG. 2, the grooves 2 start at one end of the hub body 1, but end at a distance from the other end, this end of all the grooves 2 being in a radial plane.
  • the hub body 1 consists of a molding compound based on phenol. Other insulating materials, such as thermoplastics or ceramics, can also be used. Furthermore, the material can have a fiber reinforcement. After manufacture, the hub body 1 can be annealed at a temperature which is above the operating temperature.
  • a segment 4 is arranged in each of the grooves 2.
  • the segments 4 of the same design consist of a material which is electrically conductive and is customary for commutator segments. As shown for example in FIG. 4, the segments 4 have a head part 5, the cylindrically curved end surface 5 'of which forms part of the brush running surface. The segments 4 are formed symmetrically to their longitudinal center plane 6.
  • the head part 5 is followed by a central part 8, each with a shoulder 7, the width of which, measured in the circumferential direction, is smaller by the width of the shoulders 7 than the width of the head part 5 at the end that merges into the shoulders 7 Shoulders enclose an obtuse angle opening towards the end face 5 '.
  • the middle part 8 widens like a wedge from the head part 5 to a foot part designated as a whole by 9.
  • its two flat flanks 8 ' enclose an angle of 20 °.
  • the foot part 9 has a first section 11 adjoining the middle part 8 via a shoulder 10, the width of which in the area of the shoulders 10 is smaller than that of the middle part 8 by the width thereof.
  • the width of the first section 11 increases against the the second section 12 adjoining it evenly.
  • the second section 12 adjoins one shoulder 13 with a correspondingly greater width, the width of which decreases uniformly towards its end face 9 '.
  • the foot part 9 therefore has a T-like cross-sectional profile.
  • the webs 14 have in the zone 18, in which the end section of the segments 4 leading when the segments 4 are inserted into the grooves 2 comes to lie in the fully inserted state, on the end faces 15 of the webs 14 in the radial direction an oversize, which can be seen like FIG. 5, which shows a section through the zone 18, leads to the shoulders 7 being in full contact with the end faces 15, thereby increasing the clamping force which is exerted by the webs 14 on the flanges ken 8 'of the middle part 8 is exercised.
  • the latter clamping force has a component which is directed against the foot part 9.
  • the gap 17 extends in the zone 18 between the end surface 9 'of the foot part 9 and the base of the groove 2.
  • the axial length of the zone 18 having the oversize x is approximately 15% of the axial length of the grooves 2 in the exemplary embodiment.
  • the undersize y is present, as is also shown in FIG. 6, there is a gap 20 between the end faces 15 of the webs 14 and the shoulders 7.
  • the segments 4 In the area of the end section lagging when the segments 4 are inserted into the grooves 2, the segments 4 have a zone 21 with an oversize z in the radial direction of the end face 9 'of their foot part 9.
  • This oversize z like that which represents a section through the zone 21 Fig. 6 reveals to Consequence that the end surface 9 'rests with pressure on the bottom of the assigned groove 2 and increases the clamping force which the webs 14 exert on the flanks 8' of the middle part 8.
  • a narrow slot 22 corresponding to the gap 20 is present in the area of the zone 21 between the shoulders 7 and the end faces 15 of the webs 14.
  • the oversizes x and z are selected such that the clamping forces exerted on the segments 4 in the zones 18 and 21 do not fall below the value necessary for the secure positioning and fixing of the segments 4 in the hub body 1.
  • Example of hook 25 which are molded onto the segments 4 and serve to connect the segments 4 to conductors of a rotor winding.
  • a further exemplary embodiment relates to a plug-in commutator, the segments 104 of which have two pairs of contact surfaces, and which otherwise corresponds to the first exemplary embodiment in all details not described.
  • the middle part 108 of each segment 104 has, as formed on the webs 1 14 of the hub body 101 in the first embodiment, a pair of edges 108 ', which surfaces as 6.3flä ⁇ .
  • the flank pair 108 ' which is open radially inward, encloses an angle a.
  • the radially inner foot part 109 of each segment 104 has a further pair of flanks 113, which are also designed as contact surfaces on the webs 114.
  • the further flank pair 113 encloses an angle ⁇ and is also open radially inwards.
  • the angle ß is smaller than the angle a. In the borderline case it can be ß - 0 °, ie the flanks 1 13 run parallel to each other.
  • the segments 104 When the segments 104 are inserted into the grooves 102 of the hub body 101, the segments 104 are pressed radially outwards by the oversize in the end section.
  • the flanks 11 13 provided on the base part 109 come into contact with the webs 114. Due to the small angle ⁇ , the webs 114 counteract the insertion of the segments 104 only with little force.
  • the flanks 113 When inserted further, the flanks 113 are pressed into the hub body 101 until the flanks 108 ′ provided on the central part 108 come into contact with the webs 114. With the correct choice of the angles a and ⁇ and the other dimensions of the segments 104 and the webs 114, all the flank pairs 108 'and 113 come into contact with the webs 114.
  • the hooks 25 are still bent in the tool after the production of the segments 4, 104.
  • the segments 4, 104 are then pushed directly into the hub body 1, 101, that is to say inserted under pressure.
  • the parameters for the insertion in particular pressure and possibly temperature, are chosen so that no indissoluble press connection is produced.
  • the bore of the hub body 1, 101 can be machined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

L'invention concerne un commutateur enfichable comportant un corps de moyeu (1) réalisé dans un matériau électro-isolant, et pourvu de rainures identiques réparties uniformément sur son pourtour, dans lesquelles est enfoncé chaque segment (5) de structure identique, constituant la surface de contact des balais, de manière à former un assemblage par liaison de forme dans le sens radial. Une force de serrage reposant sur un surdimensionnement (x, z) des segments (5) et/ou des parties de matériau servant à soutenir les segments (5) permet d'éviter que lesdits segments (5) ne se déplacent par rapport au corps du moyeu (1). Un surdimensionnement (x, z) déterminant la force de serrage exercée sur les segments (5) n'est prévu que dans la zone des deux sections extrêmes (18, 21) des segments (5) et/ou des rainures.
EP96928428A 1995-08-16 1996-08-08 Commutateur enfichable et son procede de production Expired - Lifetime EP0791236B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9630208T SI0791236T1 (en) 1995-08-16 1996-08-08 Plug-in commutator and method for its production

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19530051 1995-08-16
DE19530051A DE19530051C2 (de) 1995-08-16 1995-08-16 Steckkommutator
PCT/EP1996/003505 WO1997007573A1 (fr) 1995-08-16 1996-08-08 Commutateur enfichable et son procede de production

Publications (2)

Publication Number Publication Date
EP0791236A1 true EP0791236A1 (fr) 1997-08-27
EP0791236B1 EP0791236B1 (fr) 2000-03-29

Family

ID=7769576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96928428A Expired - Lifetime EP0791236B1 (fr) 1995-08-16 1996-08-08 Commutateur enfichable et son procede de production

Country Status (10)

Country Link
US (1) US5760517A (fr)
EP (1) EP0791236B1 (fr)
JP (1) JPH10507577A (fr)
BR (1) BR9606583A (fr)
DE (2) DE19530051C2 (fr)
ES (1) ES2146409T3 (fr)
HU (1) HUP9702438A3 (fr)
SK (1) SK47097A3 (fr)
TR (1) TR199700298T1 (fr)
WO (1) WO1997007573A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0944938T3 (da) * 1996-12-12 2002-07-01 Comtrade Handelsgmbh Kommutator med armeringsring
GB2314693B (en) * 1997-09-29 1998-08-12 Watliff Co Ltd A plug in commutator, a plug in segment for making a plug in commutator and a hub body for making a plug in commutator
DE19744357A1 (de) * 1997-10-08 1999-04-15 Bosch Gmbh Robert Kommutator
US5949174A (en) * 1998-07-08 1999-09-07 Siemens Canada Limited Commutator for two speed electric motor and motor incorporating same
DE19922235C2 (de) * 1998-08-21 2002-05-23 Kirkwood Ind Gmbh Kommutator und Verfahren zur Herstellung eines Kommutators
DE19837961C2 (de) * 1998-08-21 2001-08-16 Kirkwood Ind Gmbh Kommutator und Verfahren zur Herstellung eines Kommutators
DE19854843A1 (de) * 1998-11-27 2000-06-08 Kirkwood Ind Gmbh Vorrichtung zum Stromwenden, insbesondere Kommutator, und Verfahren zur Herstellung einer solchen Vorrichtung
JP3559181B2 (ja) * 1998-11-30 2004-08-25 三菱電機株式会社 電動パワーステアリング装置用モータ
JP4166387B2 (ja) * 1999-10-04 2008-10-15 アスモ株式会社 給電ブラシ付電動機
DE10250261A1 (de) * 2002-10-28 2004-06-09 Kolektor D.O.O. Kommutator für eine elektrische Maschine und Verfahren zu seiner Herstellung
DE102005028791A1 (de) * 2005-06-16 2006-12-28 Kautt & Bux Gmbh Plankommutator und Verfahren zur Herstellung eines Plankommutators
JP5340531B2 (ja) * 2006-10-19 2013-11-13 株式会社デンソー 回転電機
DE102010038993A1 (de) * 2010-08-06 2012-02-09 BSH Bosch und Siemens Hausgeräte GmbH Kommutator für eine elektrische Maschine und zugehöriges Herstellungsverfahren
CN105896225B (zh) * 2016-06-13 2018-05-22 薛瑞华 钩型换向器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE307451C (fr) *
DE669872C (de) * 1939-01-05 Electricitaetsgesellschaft San Verfahren zur Herstellung von Kollektoren
GB1172308A (en) * 1966-03-22 1969-11-26 Fed Motor Parts Corp Proprieta Improvements in or relating to Commutators
GB2221580B (en) * 1988-08-04 1992-09-23 Johnson Electric Ind Mfg A two part commutator assembly for an electric motor
WO1995014319A1 (fr) * 1993-11-15 1995-05-26 Kautt & Bux Commutator Gmbh Commutateur et son procede de fabrication
SI9300660A (en) * 1993-12-16 1995-06-30 Kolektor D O O Idrija Commutator for small and midle electric machines and process for making it

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9707573A1 *

Also Published As

Publication number Publication date
SK47097A3 (en) 1997-10-08
DE19530051C2 (de) 2002-02-07
HUP9702438A3 (en) 2000-03-28
ES2146409T3 (es) 2000-08-01
JPH10507577A (ja) 1998-07-21
EP0791236B1 (fr) 2000-03-29
DE59604838D1 (de) 2000-05-04
US5760517A (en) 1998-06-02
WO1997007573A1 (fr) 1997-02-27
DE19530051A1 (de) 1997-02-20
TR199700298T1 (tr) 1997-08-21
BR9606583A (pt) 1997-10-28
HUP9702438A2 (hu) 1998-03-30

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