EP0224054A2 - Moteur électrique pour un petit outil électrique - Google Patents

Moteur électrique pour un petit outil électrique Download PDF

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Publication number
EP0224054A2
EP0224054A2 EP86114907A EP86114907A EP0224054A2 EP 0224054 A2 EP0224054 A2 EP 0224054A2 EP 86114907 A EP86114907 A EP 86114907A EP 86114907 A EP86114907 A EP 86114907A EP 0224054 A2 EP0224054 A2 EP 0224054A2
Authority
EP
European Patent Office
Prior art keywords
switch
lead frame
contact
changeover
arrangement
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
EP86114907A
Other languages
German (de)
English (en)
Other versions
EP0224054B1 (fr
EP0224054A3 (en
Inventor
Walter Köster
Dieter Jüling
Reimund Becht
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.)
Black and Decker Inc
Original Assignee
Black and Decker Inc
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 Black and Decker Inc filed Critical Black and Decker Inc
Publication of EP0224054A2 publication Critical patent/EP0224054A2/fr
Publication of EP0224054A3 publication Critical patent/EP0224054A3/de
Application granted granted Critical
Publication of EP0224054B1 publication Critical patent/EP0224054B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H9/06—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
    • H01H9/063—Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner enclosing a reversing switch

Definitions

  • the invention relates to a cup-shaped bearing bracket made of plastic for the motor of a small power tool, with an on / off switch, a changeover switch, two connection terminals for a mains cable, a capacitor and a contact grid.
  • a major disadvantage of this combination is that a changeover switch separate from the on / off switch is required and that the connection of the power cord and the interference suppression capacitor to the field plug requires complex assembly work.
  • the object of the invention is therefore to provide a bearing bridge for the stator of an electric motor, which is simpler than in the prior art and is also easier to assemble.
  • the terminals extend as field connectors through the bottom of the bearing bracket, that a switch assembly is inserted in the bearing bracket and carries a contact grid that the contact grid as a lead frame for the optional connection of chokes, switches, diodes, resistors or similar is carried out that the lead frame has on / off contact points and direction of rotation changeover contact points, that the lead frame lies on the side of the switch arrangement facing the rotor, that changeover contacts are arranged on the side of the switch arrangement facing away from the rotor, and that means are provided for to actuate the changeover contacts simultaneously with the on / off switch contacts.
  • a switch arrangement which simultaneously serves as an on / off switch and as a changeover switch.
  • the changeover switch can be a direction changeover switch or a speed changeover switch which changes from a first speed to a second speed speed switches.
  • the switch arrangement is essentially constructed from a carbon holder plate and a switching ring connected to the coal holder plate in a cover-like manner.
  • the carbon holders, suppressor chokes, possibly diodes, return springs and contact springs are located between the carbon holder plate and the switching ring.
  • the entire switch arrangement can be inserted into the bearing bridge and can be placed on the bottom of the bearing bridge.
  • a radial extension of the switching ring protrudes outwards through the bearing bridge and can be actuated either directly or indirectly via a linkage by the trigger switch of the power tool.
  • the switch arrangement also has recesses for the insertion of a lead frame on one side, which faces the rotor in the assembled state.
  • Field plugs can be inserted from the outside through the bottom of the bearing bridge and through slots in the switch arrangement so that they can penetrate the switch arrangement and contact the field winding terminals of stator field windings.
  • Fig. 1 shows the essential parts of an electric motor in a perspective, exploded view, which is also referred to as a so-called exploded view.
  • the laminated core of a stator 2 with field windings 9 wound in a known manner is held by a bearing bridge 1 made of plastic.
  • the bearing bridge 1 is cup-shaped with a bottom at one end into which a bearing 5 is inserted.
  • the bearing 5 serves to support one end of the shaft of a rotor 3, which has rotor windings 48 and a commutator 49 for connecting the winding ends in a manner known per se.
  • the commutator 49 is arranged on the side of the bearing journal 50 of the rotor shaft.
  • the bearing pin 50 is supported by the bearing 5.
  • a washer 51 is usually inserted between the commutator 49 and the bottom of the bearing bracket 1, since the rotor 3 is made of metal, while the bearing bracket 1 is made of plastic.
  • the end of the rotor shaft facing away from the journal 50 is as Spline shaft 52 is formed, on which a fan wheel 4 is attached.
  • the fan wheel 4 has vanes or ribs 53 with which cooling air is supplied to the stator 2 and the rotor 3, in particular their field windings 9 and 48.
  • Field plugs 15 are inserted through the bottom of the bearing bridge 1 from the side of the bearing 5, which engage with their contact tongues 19 in field winding terminals 17 and are intended to establish a connection from the network to the field windings 9.
  • the ends of the field windings 9 are connected to resilient field winding terminals 17, for example soldered to them, wound around the field winding terminals 17 or clamped to them.
  • the most appropriate assembly method in each case can be selected by the person skilled in the art without difficulty.
  • the field plugs 15 shown schematically in FIG. 1 are provided at their other ends facing away from the contact tongues 19 with connecting means for connecting mains connection cables. These connection means can be seen better in FIG. 2.
  • a capacitor 14 is usually connected to the field plugs 15 and is used for noise suppression and for radio interference suppression.
  • Suppression chokes 13 are also provided, which are connected into the supply line from the network to the field windings 9.
  • Carbon holders 10 serve to receive carbon brushes 12, which are pressed radially inwards by springs 11 into contact with the commutator 49 of the rotor 3. Finally, to secure the rotor shaft, a washer 6 and a clamping ring 7 are used, which on the free end of the bearing pin projecting through the bearing 5 50 are inserted and prevent axial displacement or release of the bearing pin 50 from the bearing 5.
  • Fig. 2 shows essentially details of the bearing bracket 1 with associated parts in an exploded view.
  • the bearing bracket 1 which is preferably made of plastic by injection molding, consists of two half-shells 1 and 1 ', which can be locked together by being pressed together.
  • a bearing shell 8 is provided at the bottom of the bearing bridge half shells 1, 1 ' for receiving the rotor shaft bearing 5 shown in FIG. 1.
  • the bearing shell 8 has radial flanges 8 ′ which can be seen in the drawing and which prevent the bearing 5 from being axially displaced.
  • the capacitor 14 is placed over or on the bearing shell 8, the capacitor connections 14 ′ of which encompass the bearing shell 8.
  • the capacitor connections 14 ′ are inserted through channels which are provided in field plug holders 54.
  • the box connector brackets 54 are also connected to the bearing bracket half-shells 1, 1 'axially formed and thus extend parallel and 8 at a distance to the shell of the bearing shell in the bottom of the L-shells ager Hampshiren 1, 1' are in the range of the field connector mounts 54 slots 57 are provided through which the field plugs are inserted from the side of the bearing shell 8 into the interior of the bearing bridge 1 receiving the stator 2.
  • the field plugs 15 are provided with clamping screws 23 for fastening connecting cables which have no cable lugs.
  • FIG. 2 also shows a switching ring 30, a carbon holder plate 31 and a lead frame 60 which, together with other components, form a switch arrangement 45 to be inserted into the bearing bridge 1. It serves to hold the carbon holder 10 with the carbon brushes 12 for receiving the suppressor chokes 13 and to form a combined on / off and right / left switch.
  • contact springs 32 and 32 ' are used which, depending on the switching position of the switching ring 30, touch one side of the lead frame 60 and thus determine the direction of rotation of the motor.
  • At least one return spring 34 serves to move the switching ring 30 back into the starting position in the neutral position of its switch 80.
  • FIG. 3 shows an exploded view of details of the switch arrangement 45 from FIG. 2.
  • the switch arrangement 45 has the carbon holder plate 31 as a base, which is covered by the switch ring 30. Between the switching ring 30 and the carbon holder plate 31, the carbon holder 10 with the carbon brushes 12, the interference suppressors 13, the contact springs 32 and 32 'and two return springs 34 are inserted, of which only one can be seen in FIG. 3.
  • the return spring 34 is a helical spring with two ends, between which a projection 35 formed on the switching ring 30 engages.
  • the return spring 34 is also plugged onto a pin 33 and its ends are supported on projections of the carbon holder plate 31 in such a way that one end of the return spring 34 is held on the carbon holder plate 31 when the other end when the switching ring 30 is rotated from the projection 35 the starting position is moved. as a result, a spring force acts on the switching ring 30, which always tries to return it to the starting position.
  • the movement or rotation of the switching ring 30 takes place in that an adjusting force acts on an extension 36 formed radially on the switching ring 30.
  • the switching ring 30 is actuated by a changeover switch 80, which is shown in FIG. 2 alone and in FIG. 3 in connection with a trigger switch 90.
  • the trigger switch 90 is a switch common to hand-held power tools, which is normally housed in the pistol grip of such a power tool and is actuated by a user's index finger by pulling back.
  • the trigger switch 90 is reset by a compression spring, not shown in the figures. It is usually supported between the surface of the trigger switch 90 facing away from the index finger and a wall of the pistol grip of the power tool.
  • a socket (not shown in the figures), into which a pin 81 (FIG. 2) of the changeover switch 80 can be inserted, is molded into the trigger switch 90.
  • the switch 80 has a base plate 82 which carries a switch cam 83.
  • the switch cam 83 is diamond-shaped in plan view, its longitudinal axis being aligned with a switch lever 84 which can be pivoted to the right or left side of the trigger switch 90 by finger actuation.
  • the pivot point for this pivoting movement is formed by the pin 81 seated in the socket of the trigger switch 90, the axis of which lies approximately in the region of the end of the switch cam 83 which is adjacent to the switch lever 84. This creates a two-armed lever with vertical cam surfaces 85, each at an oblique angle to Middle plane and thus to the direction of movement of the trigger switch 90.
  • one or the other cam surface 85 alternately engages with the left or right side of the switching ring extension 36 and thereby pushes it either to the left or to the right, which causes the switching ring 30 to rotate clockwise or counterclockwise.
  • the straight forward and backward movement of the trigger switch 90 is converted into a rotary movement of the switching ring 30.
  • the actuation of the switching ring 30 is also possible in other ways, for example by toothing with a toothed rack and gear or teeth provided on the circumference of the switching ring 30.
  • the person skilled in the art is familiar with the suitable choice of the movement implementation from the trigger switch 90 to the switching ring 30 and therefore need not be explained in more detail.
  • L-shaped shoes 37 which serve to hold the contact springs 32 and 32 ′, are formed on the side of the switching ring 30 facing the carbon holder plate 31, which is the same side that carries the projections 35 that extend between the ends of the return spring 34.
  • the contact springs 32 and 32 ' are metallic spring contacts with two legs 38 which run essentially parallel to one another and cross one another and which engage at opposite ends of a base plate 39. The legs 38 are bent at their ends to form contact feet 40.
  • a connection lug 41 is formed on the base plate 39, which in the assembled state reaches through an associated connection opening 42 of the carbon holder plate 31 and can thereby be connected to the lead frame 60, for example by soldering.
  • the width of the L-shaped shoes 37 is dimensioned such that, in the starting position of the switching ring 30, both contact feet 40 of a contact spring 32 or 32 'rest in the vicinity of the side edges of the part of the L-shaped shoe 37 which runs parallel to the plane of the switching ring 30.
  • the switching ring 30 is rotated clockwise or counterclockwise, however, one of the contact feet 40 slides off the shoe 37, since the connecting lug 41 is held in relation to the carbon holder plate 31.
  • the contact spring 32 or 32 ' is, so to speak, stationary with respect to the carbon holder plate 31, while the switching ring 30 and thus its shoes 37 are movable.
  • the switch 80 is now switched to the other position, then when the push button switch 90 is pressed again, the stamping ring is rotated in the other direction and the other contact foot 40 of the contact spring 32 or 32 'can be opened through an associated opening 69 in the carbon holder plate 31 snap and the contact grid Contact 60 for example to reverse the direction of rotation or to reduce the speed.
  • a box 43 is expediently formed on the side of the carbon holder plate 31 facing the switching ring 30 in the area of the contact springs 32, 32 'and serves to receive the contact springs 32, 32'.
  • the walls of the box 43 ensure that the contact springs 32, 32 'do not fall out of the L-shaped shoes 37 of the switching ring 30.
  • further holes 73 are provided in the carbon holder plate 31, which are used to push through the suppression chokes 13 or diodes or resistors, which can additionally be accommodated in the switch arrangement.
  • FIG. 4 shows the lead frame 60 recognizable in FIG. 2 and attachable to the bottom of the carbon holder plate 31 in the form of a flat grid made of thin, electrically conductive material with an outer band conductor 61 and an inner band conductor 65.
  • the inner and outer band conductors 65 and 61 are connected by bridges 66.
  • the outer band conductor 61 has approximately the shape of a ring interrupted at diametrically opposite points. At the ends of the interruption points, contact points 67 and 68 are provided for contacting by the legs 38 of the contact springs 32, 32 'shown in FIG. 2.
  • the two halves of the outer strip conductor 61 are connected to one another in the vicinity of the contact points 67 and 68 by connecting webs 63.
  • these connecting webs 63 are severed along dividing lines 64. This creates a flat, flat network of two halves. It should be noted that for easier assembly of the lead frame 60 are incorporated in the bottom surface of the carbon holder plate 31 facing away from the switching ring 30, not shown in the drawing, which correspond to the lead frame 60, so that the lead frame 60 easily on or in the Carbon holder plate 31 can be fixed.
  • the contacting of the contact points 67 and 68 takes place through the legs 38 of the contact springs 32, which are alternately moved by the switching ring 30 through one of the two openings 69 (FIG. 2) in the carbon holder plate 31.
  • the outer strip conductor 61 there are also connecting tongues 62, which were originally produced in the plane of the lead frame 60 and, after punching out, are bent perpendicular to the lead frame plane.
  • the connecting tongues 62 are used to make contact with one field winding terminal 17. This ensures that the mains current supplied via the field connector 15 initially flows according to FIG. 5 or 6 via a field winding 9 and from there through the connecting tongue 62 to the outer ribbon conductor 61 of the lead frame 60 to be led.
  • the current flows from the outer band conductor 61 either directly to the inner band conductor 65 and from there via the carbon brushes 12 through the rotor 3, or indirectly according to FIG. 5 via a right / left (R / L) - Changeover switch 80 and optionally via a suppressor choke 13.
  • connecting lugs 70 are provided, which are perpendicular to the plane of at predetermined locations S 60 bent up dancing grating.
  • the inner strip conductor 65 and / or the outer strip conductor 61 have bores 75 which serve to connect components such as interference suppression coils 13 or diodes 71 (FIG. 6) respectively.
  • the ends of the interference suppression chokes 13 and / or the diode 71 are inserted either through the bores 75 or in the immediate vicinity of a connecting lug 70 through holes 73 provided in the carbon holder plate 31, so that they can be soldered to the lead frame 60 without further ado.
  • the lead frame 61 is divided into two halves by separating the connecting webs 63 (FIG. 4).
  • the current flows, for example, from the network via the first field winding terminal 17 through the first field winding 9 and the first connecting tongue 62 into the upper, outer strip conductor 61. From the upper strip conductor 61, the current continues to flow via the upper bridge 66 to the upper carbon brush 12. From the upper Carbon brush 12, the current flows through the commutator 49 (FIG. 1) of the rotor 3 to the lower carbon brush 12 '. The current flow continues from the lower carbon brush 12 'via the lower, inner band conductor 65' and the lower bridge 66 'to the lower, outer band conductor 61'. The current is taken from the latter via the lower connecting tongue 62 'and conducted via the other field winding 9' to the other field winding terminal 17 '.
  • the second connection cable is connected to the latter via the other field plug 15, which is also shown in FIGS. 1 and 2.
  • the capacitor 14 and a resistor connected in parallel with it are also shown. The latter serves to balance the charge on the capacitor 14 when the power cord is disconnected from the field plugs 15 so that the user cannot get an electric shock.
  • FIG. 6 also shows the lead frame 60 in a schematic representation, specifically with suppressor chokes 13 and with a diode 71 and with an R / L switch 80.
  • the chokes 13 are inserted at one end through the bores 75 of the inner ribbon conductor 65 and soldered to it, while their other end is connected to a connecting lug 70 of the inner ribbon conductor 65.
  • a further bore in the inner band conductor 65 can also be provided.
  • the connection between the bore 75 and the connecting lug 70 is punched out, so that the bridge 66 to the outer strip conductor 61 is interrupted.
  • the current now flows from the connecting tongue 62 via the outer band conductor 61 to the R / L changeover switch 80 and, for example, in the case of clockwise rotation from the changeover switch 80 via the inner band conductor 65 and the suppression choke 13 to the carbon brush 12.
  • the R / L switch 80 also has a neutral zero position, which is denoted by "0". As a result, the R / L switch 80 is also an on / off switch.
  • the lead frame 60 according to the invention can also be fitted in another way, the type of fitting not presenting any difficulties for the person skilled in the art.
  • the diode 71 can be switched on in the outer band conductor 61, as is dash-dotted is indicated.
  • a connecting bridge 72 is then provided in the other half of the lead frame 60 instead of the diode 71, as a result of which the changeover switch 80 does not reverse the direction of rotation, but rather switches between two different speeds.
  • the width of the strip conductors 61 and 65 is approximately 1 to 2 mm and their thickness is approximately 0.1 to 0.3 mm.
  • the correct dimensioning can, however, be selected by the person skilled in the art without difficulty.
  • FIG. 7 shows the field connector 15 in an enlarged perspective view, the shaft 18 of which is cut from a flat strip of electrically conductive material, preferably stamped.
  • the clamping screw shown in Fig. 2 and 23 e is inschraubcardi merely by an arrow 27 indicated.
  • the connection means for power cords are provided, and that plug-in lugs 16, 16 'and a clamping screw 23 (FIG. 2), while at the other end of the contact tongue 19 is formed with transverse ribs 29.
  • K between the portable terminal end and of the contact tongue 19 of the shaft 18 are cut-outs and recesses, which are provided for the sake of material saving, as well as shaping the sake of bearing bridge.
  • the transverse ribs 29 are used to make contact with the field winding terminals 17 of the stator 2 which can be seen in FIG Are bent into a V-shape. They are used for attaching cable lugs known per se, provided that the power cord with such cable lugs ver are seen. If, on the other hand, the mains connection cable has no cable lugs, its free, stripped ends can be clamped to the shaft 18 by clamping screws 23 (FIG. 2). For this purpose, the free end of the shaft 18 is angled to an end lug 25 by 90 ° and forms an abutment for a power cable connection end.
  • the clamping screws 23 are usually screwed into a threaded connection 24 of the field connector 15 with a self-tapping thread, the threaded connection 24 advantageously being produced by punching and flanging. It is clear that the distance from the center of the threaded connector 24 to the end lug 25 must be slightly larger than half the diameter of the head of a clamping screw 23 so that the clamping screw head can be screwed fully against the shaft 18. If the distance between the clamping screw head and the end lug 25 is too large, a cable end to be clamped between the clamping screw 23 and the shaft 18 can slip out. The person skilled in the art knows that the ideal distance from the end lug 25 to the clamping screw 23 is given when the end lug 25 just touches the head of the clamping screw 23.
  • a reinforcing rib 28 running in the longitudinal direction of the shaft 18 is also embossed on one side of the shaft 18.
  • Parallel to the reinforcing rib 28 is approximately half the length of the shaft 18, a barb 26, which is made through a short incision perpendicular to the reinforcing rib 28 and a longer incision parallel to the reinforcing rib 28, and by subsequent bending out of the plane of the shaft parallel to the reinforcing rib 28 18 is formed.
  • the barb 26 serves to secure the field plug 15 from being inserted into the bearing bridge against axial falling out by: hooks against the floor of the bearing bridge 1.
  • FIG. 7 also shows a knife contact 20, which is molded onto a (in FIG. 7, left) side edge of the shaft 18. It is connected to the shaft 18 via a first part 21, while a second part 22 runs parallel to the shaft 18 at a short distance.
  • the knife contact 20 forms an angle of 90 ° with the plane of the shaft 18, so that it lies essentially in a normal plane to the plane of the shaft 18.
  • the knife contact 20 projects laterally from the shaft 18, namely upwards in FIG. 3.
  • a second knife contact is formed on the opposite (right) side edge of the shaft 18 at the same height and bent downward, so that the field connector has a total of two knife contacts 20 which are bent in opposite directions with respect to the shaft 18.
  • the distance between the second part 22 of the knife contact 20 and the shaft 18 of the field connector 15 is expediently chosen so that this distance is somewhat smaller than the diameter of the stripped capacitor connections 14 '.
  • the second part 22 of the knife contact 20 clamps a stripped capacitor connection 14 'on the shaft 18 of the field connector 15 and in this way establishes a reliable galvanic connection.
  • the free end is expedient of the second part 22 of the knife contact 20 is slightly chamfered, so that there is a somewhat larger distance from the shaft 18 in the region of the free end of the knife contact 20.
  • a capacitor connection 14 ' can first be detected and, when the field connector 15 is pressed further into the bearing bridge 1, it can be clamped in that the second part 22 of the knife contact 20 is slightly bent up relative to the shaft 18.

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  • Motor Or Generator Frames (AREA)
EP86114907A 1985-10-31 1986-10-27 Moteur électrique pour un petit outil électrique Expired - Lifetime EP0224054B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853538939 DE3538939A1 (de) 1985-10-31 1985-10-31 Becherfoermige lagerbruecke
DE3538939 1985-10-31

Publications (3)

Publication Number Publication Date
EP0224054A2 true EP0224054A2 (fr) 1987-06-03
EP0224054A3 EP0224054A3 (en) 1989-08-16
EP0224054B1 EP0224054B1 (fr) 1992-06-03

Family

ID=6285035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86114907A Expired - Lifetime EP0224054B1 (fr) 1985-10-31 1986-10-27 Moteur électrique pour un petit outil électrique

Country Status (2)

Country Link
EP (1) EP0224054B1 (fr)
DE (2) DE3538939A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3744488A1 (de) * 1987-12-30 1989-07-20 Kress Elektrik Gmbh & Co Elektrischer universalmotor
DE3923421A1 (de) * 1989-07-15 1991-01-24 Kress Elektrik Gmbh & Co Elektrischer universalmotor
DE4004463A1 (de) * 1989-07-15 1991-01-24 Kress Elektrik Gmbh & Co Schaltvorrichtung fuer elektrische umschaltung von elektrowerkzeugen
EP0335353A3 (fr) * 1988-03-31 1991-06-05 SCHUNK Motorensysteme GmbH Grille en matériau de tôle électriquement conductrice
DE3943651C2 (fr) * 1989-07-15 1993-01-28 Kress-Elektrik Gmbh & Co. Elektromotorenfabrik, 7457 Bisingen, De

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8701260A (nl) * 1987-05-27 1988-12-16 Philips Nv Collectormachine.
DE4243137C2 (de) * 1992-12-19 1995-05-24 Bosch Gmbh Robert Bürstenträger für eine elektrische Kleinmaschine
US6048020A (en) * 1998-02-11 2000-04-11 Yazaki Corporation Electrical interconnection module for vehicle instrument panel
DE10226766B4 (de) * 2002-06-14 2007-01-18 Gerhard Geiger Gmbh & Co Antriebsvorrichtung
DE102007039550A1 (de) * 2007-08-21 2009-02-26 Metabowerke Gmbh Elektromotor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2631431C2 (de) * 1976-07-13 1981-10-08 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektrowerkzeug
DE2745109A1 (de) * 1977-10-07 1979-04-12 Bosch Gmbh Robert Elektrische maschine, insbesondere handwerkzeugmaschine
IT7922514U1 (it) * 1979-09-12 1981-03-12 Star Utensili Elett S P A Disposizione di montaggio di un interruttore di comando in un utensile elettrico.
FR2486323A1 (fr) * 1980-07-04 1982-01-08 Paris & Du Rhone Ensemble regulateur et porte-balais pour alternateur, notamment de vehicule automobile
US4348603A (en) * 1981-01-29 1982-09-07 Black & Decker Inc. Printed-circuit board and trigger-switch arrangement for a portable electric tool
DE3147418C2 (de) * 1981-11-30 1986-05-22 Black & Decker, Inc. (Eine Gesellschaft N.D.Ges.D. Staates Delaware), Newark, Del. Isolierstoffteil für Bauteile eines Elektrowerkzeugs

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3744488A1 (de) * 1987-12-30 1989-07-20 Kress Elektrik Gmbh & Co Elektrischer universalmotor
EP0335353A3 (fr) * 1988-03-31 1991-06-05 SCHUNK Motorensysteme GmbH Grille en matériau de tôle électriquement conductrice
DE3923421A1 (de) * 1989-07-15 1991-01-24 Kress Elektrik Gmbh & Co Elektrischer universalmotor
DE4004463A1 (de) * 1989-07-15 1991-01-24 Kress Elektrik Gmbh & Co Schaltvorrichtung fuer elektrische umschaltung von elektrowerkzeugen
DE3943651C2 (fr) * 1989-07-15 1993-01-28 Kress-Elektrik Gmbh & Co. Elektromotorenfabrik, 7457 Bisingen, De
US5196747A (en) * 1989-07-15 1993-03-23 Kress-Elektrik Gmbh & Co., Elektromotoren Fabrik Universal electric motor

Also Published As

Publication number Publication date
EP0224054B1 (fr) 1992-06-03
EP0224054A3 (en) 1989-08-16
DE3538939A1 (de) 1987-05-07
DE3685554D1 (de) 1992-07-09

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