EP1216496A1 - Stamped grid with an integrated hall sensor for rotational speed pick-off - Google Patents

Stamped grid with an integrated hall sensor for rotational speed pick-off

Info

Publication number
EP1216496A1
EP1216496A1 EP01909481A EP01909481A EP1216496A1 EP 1216496 A1 EP1216496 A1 EP 1216496A1 EP 01909481 A EP01909481 A EP 01909481A EP 01909481 A EP01909481 A EP 01909481A EP 1216496 A1 EP1216496 A1 EP 1216496A1
Authority
EP
European Patent Office
Prior art keywords
lead frame
electrically operated
operated motor
hall
shaft
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.)
Withdrawn
Application number
EP01909481A
Other languages
German (de)
French (fr)
Inventor
Martin Wiesler
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1216496A1 publication Critical patent/EP1216496A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/66—Structural association with auxiliary electric devices influencing the characteristic of, or controlling, the machine, e.g. with impedances or switches
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/20—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by affixing prefabricated conductor pattern
    • H05K3/202—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by affixing prefabricated conductor pattern using self-supporting metal foil pattern
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
    • H02K2211/03—Machines characterised by circuit boards, e.g. pcb
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • H02K7/1163—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion
    • H02K7/1166—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears where at least two gears have non-parallel axes without having orbital motion comprising worm and worm-wheel
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10151—Sensor
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/341—Surface mounted components
    • H05K3/3421—Leaded components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/341—Surface mounted components
    • H05K3/3431—Leadless components
    • H05K3/3442—Leadless components having edge contacts, e.g. leadless chip capacitors, chip carriers

Definitions

  • the invention relates to a lead frame with an integrated Hall sensor for tapping a speed on an electric motor, for example on a DC motor with a commutator.
  • a rotor which can be driven in two directions of rotation and has a rotor shaft is accommodated in a motor housing.
  • Such electric motors are used in particular as drive motors for window regulators, sunroof actuation, seat adjustment and mirror adjustment in motor vehicles, in applications in which the smallest and lightest designs of electric drives are required.
  • Electric motors with speed taps and Hall sensors are known from the prior art.
  • electrically operated motors with a shaft receiving a magnetic rotor body its speed is tapped by a Hall sensor arranged on a printed circuit board.
  • the circuit board is designed with solder pins or contact pins integrated in the built-in part of the motor. Contacts, supply and signal lines for the printed circuit board are injected and / or inserted into the component of the motor.
  • a circuit board is used, which acts as a carrier and is recorded on the conductor tracks together with contacts.
  • additional costs are associated with the production of the printed circuit board, on the other hand the printed circuit board takes up limited space within the direct current electric motor, which means that External dimensions of such a type DC motor can be adversely affected.
  • the size of an electric motor can be reduced further and the direct current motor can be manufactured much more economically.
  • the circuit board previously provided with conductor tracks, contacts and components applied in separate production steps, is replaced by a single stamped sheet metal part.
  • the stamped sheet metal part also serves as
  • the overall depth of a carrier element accommodating a Hall element can be drastically reduced.
  • the punching out of unnecessary parts from the sheet metal part is accompanied by a further reduction in weight, and the use of a thin sheet metal part also permits a large number of complicated geometries with which a Hall IC can be positioned as close as possible to the rotor shaft of an electric motor, the speed of which can be tapped is.
  • the lead frame can be used with other modules if necessary
  • Capacitors and other resistors can be easily assembled.
  • Base plate are made. Until the resulting electrical Separation of the components forms the lead frame - a component that runs on several levels - which can replace conventional circuit boards in electric motors. An extremely thin sheet metal part such as the lead frame according to the invention can be exchanged very easily on electric motors and represents only a small amount of change required.
  • the leadframe By using a lead frame, problems such as broken solder and conductor contact points due to vibrations on a DC electric motor can be avoided.
  • the leadframe itself has sufficient flexibility that can absorb and dissipate vibrations, since the webs that function as electrical connections remain sufficiently oscillatable due to the punched-out areas.
  • FIG. 1 shows a longitudinal section through a DC motor with a commutator
  • Fig. 2 shows the top view of a lead frame with Hall element, capacitor and resistors and
  • FIG. 3 shows the side view of a lead frame component according to FIG. 2.
  • DC electric motors are used in motor vehicles in particular as drives for window regulators, sunroof actuations, seat adjustment and rear-view mirror adjustment. For these purposes, electric motors are required that have a particularly light and small design.
  • the electric motor 1 is penetrated in the axial direction by a shaft 4 which is supported by two spaced apart bearings 6, 7.
  • a gear wheel 5 On the output side of the shaft 4 there is a gear wheel 5, which can be designed as a worm, which works together with a worm wheel, but which is not shown here.
  • the gear 5 as an output element can also be designed as a bevel gear, a straight or helical toothed spur gear or similar drive element or can also accommodate a pulley or the like as a transmission element for the rotary movement generated by the electric motor.
  • an armature package of an armature winding for example provided with eight grooves, is accommodated on the shaft 4, which is enclosed by two permanent magnets accommodated within the motor housing 3 of the electric motor 1.
  • the windings of the individual armature packages are connected to regions of the commutator 2 which are insulated from one another and which is in turn enclosed by a brush holder 8.
  • individual brushes are resiliently placed on the mutually insulated area of the commutator 2.
  • a shaft sensor 10 is assigned to the shaft 4 in the area of a magnetic rotor body, which in a preferred embodiment extends parallel to the axis of the shaft 4.
  • the Hall sensor 10 is preferably located only a small distance from the magnetic rotor body of the shaft 4, which can be shrunk onto the shaft 4 of the electric motor, for example, by a press fit.
  • the bearing 7 on the electric motor 1 is preferably designed as a spherical bearing, which is enclosed by a one-piece component, consisting of the brush holder 8 already mentioned on the one hand and the bearing cover 9 on the other.
  • the voltage supply of the electrically operated motor 1 according to FIG. 1 takes place via a plug 11 via power contacts 12, which are likewise accommodated in the brush holder 8.
  • the brushes accommodated in the brush holder 8, which are attached to the individual regions of the commutator 2 which are electrically insulated from one another, are adjusted to the mutually insulated regions of the commutator by spring elements (not shown in more detail) in order to produce a connection which is dimensioned such that on the one hand the motor torque is not inadmissibly reduced due to friction from the brushes, but on the other hand a perfect electrical connection between the commutator 2 and the brushes is guaranteed.
  • FIG. 2 shows the top view of a lead frame serving as a carrier element with a Hall IC as a Hall element.
  • the lead frame 13 shown in the top view, which is already provided with punchings 17, is equipped with resistors 15, 16 or capacitors 24 or one or more Hall ICs 19 by means of the SMD method, the punching out at position 18 being carried out later.
  • the lead frame 13, which has not yet been punched out 17, is still integrated in a base plate 14, from which it is largely enclosed.
  • the base plate 14 is a sheet metal part with a material thickness of only a few tenths of a millimeter, on the surface of which the individual electrical components 15, 16, 19 and 24 are applied.
  • the punched 17 so that individual electrical connections to the lead frame 13 are generated.
  • the additional step of drawing in conductor tracks by galvanizing or by means of another method for producing conductor tracks, which is necessary in the production of printed circuit boards, can be completely dispensed with.
  • the electrical separation of the individual components 15, 16, 19 and 24 from one another is realized by the punched-out portions 17; For this purpose, the individual conductor tracks are separated from the connection via the bridge webs 18 to be punched.
  • the individual conductor tracks or the attachment to the brush holder or the receptacle are to be designed so that they can vibrate, so that vibrations are absorbed, so that no solder joint breakage is to be expected and the lead frame 13 is vibration resistant.
  • the electrical components such as resistors 15, 16, Hall ICs 19 or, if appropriate, capacitors 19 and transistors containing lead frames 13 can be attached in a simple manner to the brush holder 8 of the electric motor 1.
  • a spring clip 22 cf. FIG. 3
  • a snap lock without a similar connection which enables simple interchangeability, the lead frame 13 equipped with SMD technology can be accommodated within the motor housing 3 of the electric motor 1 in a space-saving manner.
  • the space saving when using a lead frame 13 according to the invention results, on the one hand, from the fact that the lead frame 13 simultaneously functions as an extremely flat carrier material and, on the other hand, that contact pins and soldering pins are no longer required. Contacts and soldering pins, with which conventional conventional circuit boards are usually equipped, protrude from the top of the circuit boards and require space.
  • the lead frame 13, which is preferably manufactured as a sheet metal part, functions both as an electrically conductive material and as Carrier material for the components 15, 16, 19 and 24 to be accommodated.
  • the separation of the bridge webs 18 creates a detachment from the support plate 14 and a separation of electrical connections. The electrical connection now only runs via the components 15, 16, 19 and 24 to be applied.
  • FIG. 3 shows the side view of a lead frame as shown in FIG. 2.
  • the lead frame 13 can be divided, for example, by a bend 23 into a first plane 20 and a second plane 21 running offset to it.
  • a spring clip 22 or the like the lead frame 13 equipped with resistors 15 or 16 or a Hall IC 19 or also with a capacitor 24 in SMD technology can be detachably attached to a component 8 such as the brush holder 8 of an electric motor 1. Due to the releasable fastening by means of the spring clip 22, the lead frame 13 can easily be exchanged for a lead frame 13 with different equipment with electrical components.
  • a bend 23 as shown in FIG.
  • the Hall IC 19 is included on the lead frame 13 so that it extends parallel to the axis of the shaft 2 and is arranged only a short distance from a magnetic rotor body received on the shaft 4, so that an optimal speed tap on the shaft 4 of the Electric motor 1 is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)

Abstract

The invention relates to an electrically driven motor (1) having a shaft (4), whose rotational speed is picked off by a hall sensor (10) assigned to said shaft. The Hall sensor (10) is mounted on a support element (13) that is fixed to a component part (8) of the electrically driven motor (1). The support element (13) is configured with electrical conductors and is provided with electrical components (15, 16, 19, 24). The support element (13) is configured in the shape of stamped grid in which is least one Hall IC (19) is integrated for rotational speed pick-off of the shaft (4).

Description

Stanzgitter mit integriertem Hall-Sensor für DrehzahlabgriffLead frame with integrated Hall sensor for speed pick-up
Technisches GebietTechnical field
Die Erfindung bezieht sich auf ein Stanzgitter mit integriertem Hall-Sensor für einen Drehzahlabgriff an einem Elektromotor beispielsweise an einem Gleichstrommotor mit Kommutator. In einem Motorgehäuse ist ein in zwei Drehrichtungen antreibbarer Rotor mit einer Rotorwelle aufgenommen. Solche Elektromotoren werden insbesondere als Antriebsmotoren für Fensterheber, Schiebedachbetätigung, Sitzverstellung und Spiegelverstellung in Kraftfahrzeugen verwendet, bei Anwendungen, in denen kleinste und leichteste Baufoπnen von Elektroantrieben gefordert sind.The invention relates to a lead frame with an integrated Hall sensor for tapping a speed on an electric motor, for example on a DC motor with a commutator. A rotor which can be driven in two directions of rotation and has a rotor shaft is accommodated in a motor housing. Such electric motors are used in particular as drive motors for window regulators, sunroof actuation, seat adjustment and mirror adjustment in motor vehicles, in applications in which the smallest and lightest designs of electric drives are required.
Stand der TechnikState of the art
Aus dem Stand der Technik sind Elektromotoren mit Drehzahlabgriffen und Hall- Sensoren bekannt. Bei elektrisch betriebenen Motoren mit einer einen Magnetläuferkörper aufnehmenden Welle wird dessen Drehzahl von einem auf einer Leiterplatte angeordneten Hall-Sensor abgegriffen. Die Leiterplatte ist mit Lötstiften oder Kontaktstiften ausgeführt im Einbauteil des Motors integriert. Kontakte, Nersorgungs- und Signalleitungen für die Leiterplatte sind in dem Bauteil des Motors eingespritzt und/oder eingesteckt. Bei dieser Lösung wird eine Leiterplatte eingesetzt, die als Träger fungiert und auf der Leiterbahnen samt Kontakte aufgenommen sind. Mit der Fertigung der Leiterplatte sind einerseits zusätzliche Kosten verbunden, andererseits beansprucht die Leiterplatte ohnehin knappen Bauraum innerhalb des Gleichstromelektromotors, wodurch die Außenabmessungen einer solcher Art beschaffenen Gleichstrommotors ungünstig beeinflußt werden.Electric motors with speed taps and Hall sensors are known from the prior art. In electrically operated motors with a shaft receiving a magnetic rotor body, its speed is tapped by a Hall sensor arranged on a printed circuit board. The circuit board is designed with solder pins or contact pins integrated in the built-in part of the motor. Contacts, supply and signal lines for the printed circuit board are injected and / or inserted into the component of the motor. In this solution, a circuit board is used, which acts as a carrier and is recorded on the conductor tracks together with contacts. On the one hand, additional costs are associated with the production of the printed circuit board, on the other hand the printed circuit board takes up limited space within the direct current electric motor, which means that External dimensions of such a type DC motor can be adversely affected.
Darstellung der ErfindungPresentation of the invention
Mit der erfindungsgemäßen Lösung läßt sich die Größe eines Elektromotors weiter herabsetzen und der Gleichstrommotor wesentlich preisgünstiger fertigen.With the solution according to the invention, the size of an electric motor can be reduced further and the direct current motor can be manufactured much more economically.
Die Leiterplatte, bisher versehen mit in separaten Fertigungsschritten aufgebrachten Leiterbahnen, Kontakten und Bauelementen wird durch ein einziges gestanztes Blechteil ersetzt. Das gestanzte Blechteil dient gleichzeitig alsThe circuit board, previously provided with conductor tracks, contacts and components applied in separate production steps, is replaced by a single stamped sheet metal part. The stamped sheet metal part also serves as
Trägermaterial und als elektrischer Leiter, wodurch das Erfordernis desCarrier material and as an electrical conductor, whereby the requirement of
Aufbringens von Kontakten und Leiterbahnen, wie dies bei konventionell • bestückten Leiterplatten erforderlich ist, entfallen kann. Die entsprechend desIt is not necessary to apply contacts and conductor tracks, as is required with conventionally assembled • printed circuit boards. The according to the
Verlaufes elektrischer Verbindungen in Stanzgitter nach Ausstanzen nicht benötigter Bereiche verbleibenden Brückenstege machen das Aufbringen elektrischer Leiterbahnen wie bei Leiterplatten aus Pertinax oder ähnlichemThe course of electrical connections in the lead frame after punching out unneeded areas of the bridge bridges make the application of electrical conductor tracks as with printed circuit boards made of Pertinax or the like
Trägermaterial überflüssig.Backing material unnecessary.
Durch das Fehlen von Leiterbahnen und Kontakten sowie Lötstiften läßt sich die Bautiefe eines ein Hall-Elementes aufnehmenden Trägerelementes drastisch reduzieren. Mit dem Ausstanzen nicht benötigten Partien aus dem Blechteil geht einerseits eine weitere Gewichtsreduktion einher, ferner läßt die Verwendung eines dünnen Blechteiles eine Vielzahl auch komplizierter Geometrien zu, mit denen ein Hall-IC möglichst nah an der Rotorwelle eines Elektromotors positioniert werden kann, deren Drehzahl abzugreifen ist. Andererseits kann das verwendete Stanzgitter mit weiteren Baugruppen erforderlichenfallsDue to the lack of conductor tracks and contacts as well as solder pins, the overall depth of a carrier element accommodating a Hall element can be drastically reduced. The punching out of unnecessary parts from the sheet metal part is accompanied by a further reduction in weight, and the use of a thin sheet metal part also permits a large number of complicated geometries with which a Hall IC can be positioned as close as possible to the rotor shaft of an electric motor, the speed of which can be tapped is. On the other hand, the lead frame can be used with other modules if necessary
Kondensatoren und weiteren Widerständen sehr einfach bestückt werden.Capacitors and other resistors can be easily assembled.
Nachdem die elektronischen Bauteile auf dem zu konfigurierenden Stanzgitterteil bestückt sind, kann sehr einfach die elektrische Trennung bzw. die Ausbildung von elektrischen Verbindungen durch Ausstanzungen am Gitter aus derAfter the electronic components have been assembled on the lead frame part to be configured, the electrical separation or the formation of electrical connections can be made very easily by punching the grid out of the
Grundplatte vorgenommen werden. Bis zur dadurch erfolgenden elektrischen Trennung der Bauteile bildet das Stanzgitter ein - durchaus auch in mehreren Ebenen - verlaufendes Bauteil, welches konventionelle Leiterplatten in Elektromotoren zu ersetzen vermag. Ein extrem dünnes Blechteil wie das erfindungsgemäße Stanzgitter kann sehr einfach an Elektromotoren ausgetauscht werden und stellt nur einen geringen erforderlichen Änderungsaufwand dar.Base plate are made. Until the resulting electrical Separation of the components forms the lead frame - a component that runs on several levels - which can replace conventional circuit boards in electric motors. An extremely thin sheet metal part such as the lead frame according to the invention can be exchanged very easily on electric motors and represents only a small amount of change required.
Durch Verwendung eines Stanzgitters lassen sich Probleme wie gebrochene Löt- und Leiterkontaktstellen aufgrund von Erschütterungen an einem Gleichstromelektromotor vermeiden. Dem Stanzgitter selbst wohnt eine ausreichende Flexibilität inne, die Erschütterungen aufnehmen und dissipieren kann, da durch die ausgestanzten Bereiche die als elektrische Verbindungen fungierende Stege in ausreichendem Maße schwingfähig bleiben.By using a lead frame, problems such as broken solder and conductor contact points due to vibrations on a DC electric motor can be avoided. The leadframe itself has sufficient flexibility that can absorb and dissipate vibrations, since the webs that function as electrical connections remain sufficiently oscillatable due to the punched-out areas.
Zeichnungdrawing
Anhand der Zeichnung wird die Erfindung nachstehend detaillierter erläutert:The invention is explained in more detail below with reference to the drawing:
Es zeigt:It shows:
Fig. 1 einen Längsschnitt durch einen Gleichstrommotor mit Kommutator,1 shows a longitudinal section through a DC motor with a commutator,
Fig. 2 die Draufsicht auf ein Stanzgitter mit Hall-Element, Kondensator und Widerständen bestückt undFig. 2 shows the top view of a lead frame with Hall element, capacitor and resistors and
Fig. 3 die Seitenansicht eines Stanzgitterbauteiles gemäß Fig. 2.3 shows the side view of a lead frame component according to FIG. 2.
Ausführungsvariantenvariants
In der Darstellung gemäß Fig. 1 ist ein Längsschnitt durch ein Gleichstromelektromotor mit Kommutator wiedergegeben. Gleichstrom-Elektromotoren werden in Kraftfahrzeugen insbesondere als Antriebe für Fensterheber, Schiebedachbetätigungen, die Sitzverstellung sowie die Rückspiegelverstellung verwendet. Für diese Einsatzzwecke werden Elektromotoren benötigt, die eine besonders leichte und kleine Bauform aufweisen. Der Elektromotor 1 ist in axialer Richtung von einer Welle 4 durchsetzt, die von zwei voneinander beabstandeten Lagern 6, 7 abgestützt ist. Auf der Abtriebsseite der Welle 4 befindet sich ein Zahnrad 5, welches als Schnecke ausgebildet sein kann, die mit einem Schneckenrad zusammenarbeitet, welches jedoch hier nicht dargestellt ist. Das Zahnrad 5 als Abtriebselement kann daneben auch als Kegelrad, gerad- oder schrägverzahntes Stirnrad oder ähnliches Antriebselement ausgebildet sein oder auch eine Riemenscheibe oder dergleichen als Transmissionselement für die vom Elektromotor als erzeugte Drehbewegung aufnehmen.1 shows a longitudinal section through a DC electric motor with a commutator. DC electric motors are used in motor vehicles in particular as drives for window regulators, sunroof actuations, seat adjustment and rear-view mirror adjustment. For these purposes, electric motors are required that have a particularly light and small design. The electric motor 1 is penetrated in the axial direction by a shaft 4 which is supported by two spaced apart bearings 6, 7. On the output side of the shaft 4 there is a gear wheel 5, which can be designed as a worm, which works together with a worm wheel, but which is not shown here. The gear 5 as an output element can also be designed as a bevel gear, a straight or helical toothed spur gear or similar drive element or can also accommodate a pulley or the like as a transmission element for the rotary movement generated by the electric motor.
Zwischen den Lagern 6 und 7 ist ein mit beispielsweise acht Nuten versehenes Ankerpaket einer Ankerwicklung auf der Welle 4 aufgenommen, die von zwei innerhalb des Motorgehäuses 3 des Elektromotors 1 aufgenommenen Permanentmagneten umschlossen ist. Die Wicklungen der einzelnen Ankerpakete sind mit voneinander isolierten Bereichen des Kommutators 2 verbunden, der seinerseits von einem Bürstenhalter 8 umschlossen ist. Im Bürstenhalter 8 sind einzelne Bürsten federnd am voneinander isolierten Bereich des Kommutators 2 angestellt.Between the bearings 6 and 7, an armature package of an armature winding, for example provided with eight grooves, is accommodated on the shaft 4, which is enclosed by two permanent magnets accommodated within the motor housing 3 of the electric motor 1. The windings of the individual armature packages are connected to regions of the commutator 2 which are insulated from one another and which is in turn enclosed by a brush holder 8. In the brush holder 8 individual brushes are resiliently placed on the mutually insulated area of the commutator 2.
Zur Ermittlung der Drehzahl des Elektromotors 1 ist der Welle 4 im Bereich eines Magnetläuferkörpers ein Hall-Sensor 10 zugeordnet, der sich in bevorzugter Ausführungsweise parallel zur Achse der Welle 4 erstreckt. Der Hall-Sensor 10 befindet sich bevorzugt in einem nur geringen Abstand zum Magnetläuferkörper der Welle 4, der beispielsweise durch eine Preßpassung auf die Welle 4 des Elektromotors aufgeschrumpft sein kann. Am Elektromotor 1 ist das Lager 7 bevorzugt als ein Kalottenlager ausgebildet, welches von einem einstückig ausgebildeten Bauteil umschlossen ist, bestehend aus dem bereits angesprochenen Bürstenhalter 8 einerseits und andererseits dem Lagerdeckel 9.In order to determine the speed of the electric motor 1, a shaft sensor 10 is assigned to the shaft 4 in the area of a magnetic rotor body, which in a preferred embodiment extends parallel to the axis of the shaft 4. The Hall sensor 10 is preferably located only a small distance from the magnetic rotor body of the shaft 4, which can be shrunk onto the shaft 4 of the electric motor, for example, by a press fit. The bearing 7 on the electric motor 1 is preferably designed as a spherical bearing, which is enclosed by a one-piece component, consisting of the brush holder 8 already mentioned on the one hand and the bearing cover 9 on the other.
Die Spannungsversorgung des elektrisch betriebenen Motors 1 gemäß Fig. 1 erfolgt über einen Stecker 11 über Leistungskontakte 12, die ebenfalls im Bürstenhalter 8 aufgenommen sind. Die im Bürstenhalter 8 aufgenommenen Bürsten, die an die einzelnen, voneinander elektrisch isolierten Bereiche des Kommutators 2 angestellt sind, sind durch nicht näher dargestellte Federelemente an die voneinander isolierten Bereiche des Kommutators angestellt, um eine Verbindung zu erzeugen, die so bemessen ist, daß einerseits das Motormoment durch Reibung durch die Bürsten nicht unzulässig stark reduziert wird, andererseits aber eine einwandfreie elektrische Verbindung zwischen dem Kommutator 2 und den Bürsten gewährleistet ist.The voltage supply of the electrically operated motor 1 according to FIG. 1 takes place via a plug 11 via power contacts 12, which are likewise accommodated in the brush holder 8. The brushes accommodated in the brush holder 8, which are attached to the individual regions of the commutator 2 which are electrically insulated from one another, are adjusted to the mutually insulated regions of the commutator by spring elements (not shown in more detail) in order to produce a connection which is dimensioned such that on the one hand the motor torque is not inadmissibly reduced due to friction from the brushes, but on the other hand a perfect electrical connection between the commutator 2 and the brushes is guaranteed.
Fig. 2 zeigt die Draufsicht auf ein als Trägerelement dienendes Stanzgitter mit einem Hall-IC als Hall-Element.FIG. 2 shows the top view of a lead frame serving as a carrier element with a Hall IC as a Hall element.
Das in der Draufsicht dargestellte Stanzgitter 13, welches bereits mit Ausstanzungen 17 versehen ist, wird mittels des SMD-Verfahrens mit Widerständen 15, 16 oder Kondensatoren 24 oder eines oder mehrere Hall-IC's 19 bestückt, wobei die Freistanzung an Position 18 später erfolgt. Das noch nicht mit Ausstanzungen 17 versehene Stanzgitter 13 ist noch in eine Grundplatte 14 integriert, von der es weitestgehend umschlossen ist. Die Grundplatte 14 ist ein Blechteil einer Materialstärke von nur wenigen Zehntel mm, auf dessen Oberfläche die einzelnen elektrischen Bauelemente 15, 16, 19 und 24 aufgebracht werden.The lead frame 13 shown in the top view, which is already provided with punchings 17, is equipped with resistors 15, 16 or capacitors 24 or one or more Hall ICs 19 by means of the SMD method, the punching out at position 18 being carried out later. The lead frame 13, which has not yet been punched out 17, is still integrated in a base plate 14, from which it is largely enclosed. The base plate 14 is a sheet metal part with a material thickness of only a few tenths of a millimeter, on the surface of which the individual electrical components 15, 16, 19 and 24 are applied.
Abhängig vom Verlauf der erforderlichen elektrischen Verbindungen auf dem Stanzgitter 13, werden in der Regel vorher aber je nach Ausführung ist auch denkbar nach der Verbindung der elektrischen Bauteile 15, 16, 19 und 24 mit dem Stanzgitter 13 die Ausstanzungen 17 vorgenommen, so daß einzelne elektrische Verbindungen am Stanzgitter 13 erzeugt werden. Der zusätzliche, bei der Herstellung von Leiteφlatten notwendige Arbeitsschritt des Einzuges von Leiterbahnen durch Galvanisierung oder mittels eines anderes Verfahren zur Herstellung von Leiterbahnen kann vollständig entfallen. Die elektrische Trennung der einzelnen Bauelemente 15, 16, 19 und 24 voneinander wird durch die Ausstanzungen 17 realisiert; dazu werden die einzelnen Leiterbahnen über die abzustanzenden Brückenstege 18 vom Zusammenhang getrennt. Durch die dünne Materialstärke des Stanzgitters 13 aus Blech und die vorgenommenen Ausstanzungen 17 zwischen den Brückenstegen 18 sind die einzelnen Leiterbahnen bzw. die Befestigung zum Bürstenhalter oder der Aufnahme schwingfähig auszubilden, so daß Erschütterungen durch Schwingungen absorbiert werden, so daß kein Lötstellenbruch zu erwarten steht und das Stanzgitter 13 erschütterungsbeständig ist.Depending on the course of the required electrical connections on the lead frame 13, however, as a rule beforehand depending on the design conceivable after the connection of the electrical components 15, 16, 19 and 24 with the lead frame 13, the punched 17, so that individual electrical connections to the lead frame 13 are generated. The additional step of drawing in conductor tracks by galvanizing or by means of another method for producing conductor tracks, which is necessary in the production of printed circuit boards, can be completely dispensed with. The electrical separation of the individual components 15, 16, 19 and 24 from one another is realized by the punched-out portions 17; For this purpose, the individual conductor tracks are separated from the connection via the bridge webs 18 to be punched. Due to the thin material thickness of the leadframe 13 made of sheet metal and the punched-outs 17 made between the bridge webs 18, the individual conductor tracks or the attachment to the brush holder or the receptacle are to be designed so that they can vibrate, so that vibrations are absorbed, so that no solder joint breakage is to be expected and the lead frame 13 is vibration resistant.
Das elektrische Bauelemente wie beispielsweise Widerstände 15, 16, Hall-IC's 19 oder gegebenenfalls Kondensatoren 19 und Transistoren aufnehmende Stanzgitter 13 kann in einfacher Weise am Bürstenhalter 8 des Elektromotors 1 befestigt werden. Mittels eines Federclips 22 (vergleiche Fig. 3) oder eines Schnappverschlusses ohne eine ähnliche, eine einfache Austauschbarkeit ermöglichenden Verbindung, läßt sich das in SMD-Technik bestückte Stanzgitter 13 bauraumsparend innerhalb Motorgehäuse 3 des Elektromotors 1 unterbringen.The electrical components such as resistors 15, 16, Hall ICs 19 or, if appropriate, capacitors 19 and transistors containing lead frames 13 can be attached in a simple manner to the brush holder 8 of the electric motor 1. By means of a spring clip 22 (cf. FIG. 3) or a snap lock without a similar connection which enables simple interchangeability, the lead frame 13 equipped with SMD technology can be accommodated within the motor housing 3 of the electric motor 1 in a space-saving manner.
Die Bauraumersparnis beim Einsatz eines erfindungsgemäßen Stanzgitters 13 resultiert einerseits daraus, daß das Stanzgitter 13 gleichzeitig als extrem flaches Trägermaterial fungiert und andererseits keine Kontakt- und Lötstifte mehr erforderlich sind. Kontakte und Lötstifte, mit dem gängige konventionelle Leiteφlatten in der Regel ausgestattet sind, stehen über die Oberseite der Leiteφlatten hervor und benötigen Platz. Das bevorzugt als Blechteil gefertigte Stanzgitter 13 fungiert gleichzeitig als elektrisch leitendes Material und als Trägermaterial für die aufzunehmenden Bauelemente 15, 16, 19 bzw. 24. Das Abtrennen der Brückenstege 18 erzeugt einerseits ein Ablösen von der Trägeφlatte 14 und eine Trennung elektrischer Verbindungen. Die elektrische Verbindung verläuft nur noch über die aufzubringenden Bauteile 15, 16, 19 bzw. 24.The space saving when using a lead frame 13 according to the invention results, on the one hand, from the fact that the lead frame 13 simultaneously functions as an extremely flat carrier material and, on the other hand, that contact pins and soldering pins are no longer required. Contacts and soldering pins, with which conventional conventional circuit boards are usually equipped, protrude from the top of the circuit boards and require space. The lead frame 13, which is preferably manufactured as a sheet metal part, functions both as an electrically conductive material and as Carrier material for the components 15, 16, 19 and 24 to be accommodated. On the one hand, the separation of the bridge webs 18 creates a detachment from the support plate 14 and a separation of electrical connections. The electrical connection now only runs via the components 15, 16, 19 and 24 to be applied.
Fig. 3 zeigt die Seitenansicht eines Stanzgitters gemäß der Darstellung in Fig. 2.FIG. 3 shows the side view of a lead frame as shown in FIG. 2.
Das Stanzgitter 13 kann beispielsweise durch einen Knick 23 in eine erste Ebene 20 sowie eine dazu versetzt verlaufende zweite Ebene 21 unterteilt sein. Mittels eines Federclips 22 oder dergleichen läßt sich das mit Widerständen 15 oder 16 oder einem Hall-IC 19 oder auch mit einem Kondensator 24 in SMD-Technik bestückte Stanzgitter 13 an einem Bauteil 8 wie beispielsweise dem Bürstenhalter 8 eines Elektromotors 1 lösbar befestigen. Durch die lösbare Befestigung mittels des Federclips 22 ist das Stanzgitter 13 einfach gegen ein Stanzgitter 13 mit anderer Bestückung mit elektrischen Bauelementen austauschbar. Mittels beispielsweise eines Knickes 23 wie in Fig. 3 dargestellt oder auch einer T- förmigen Konfiguration oder einer U-förmigen Profilierung des Stanzgitters 13 kann dieses an den jeweils im Inneren des Elektromotors 1 zur Verfügung stehenden Bauraum in optimaler Weise angepaßt werden. Bevorzugt ist dabei das Hall-IC 19 am Stanzgitter 13 so aufgenommen, daß dieses sich parallel zur Achse der Welle 2 erstreckt und in nur geringem Abstand von einem an der Welle 4 aufgenommenen Magnetläuferköφer angeordnet ist, so daß ein optimaler Drehzahlabgriff an der Welle 4 des Elektromotors 1 möglich ist. BezugszeichenlisteThe lead frame 13 can be divided, for example, by a bend 23 into a first plane 20 and a second plane 21 running offset to it. By means of a spring clip 22 or the like, the lead frame 13 equipped with resistors 15 or 16 or a Hall IC 19 or also with a capacitor 24 in SMD technology can be detachably attached to a component 8 such as the brush holder 8 of an electric motor 1. Due to the releasable fastening by means of the spring clip 22, the lead frame 13 can easily be exchanged for a lead frame 13 with different equipment with electrical components. By means of, for example, a bend 23 as shown in FIG. 3 or also a T-shaped configuration or a U-shaped profile of the lead frame 13, this can be optimally adapted to the space available in each case in the interior of the electric motor 1. Preferably, the Hall IC 19 is included on the lead frame 13 so that it extends parallel to the axis of the shaft 2 and is arranged only a short distance from a magnetic rotor body received on the shaft 4, so that an optimal speed tap on the shaft 4 of the Electric motor 1 is possible. LIST OF REFERENCE NUMBERS
I . Elektromotor 2. KommutatorI. Electric motor 2nd commutator
3. Motorgehäuse3. Motor housing
4. Welle4th wave
5. Zahnrad5th gear
6. Lager 7. Kalottenlager6. bearing 7. spherical bearing
8. Bürstenhalter8. Brush holder
9. Lagerdeckel9. Bearing cover
10. Hall-Sensor10. Hall sensor
I I. Stecker 12. KontakteI I. Connector 12. Contacts
13. Stanzgitter13. Punching grid
14. Grundplatte14. Base plate
15. Widerstand15. Resistance
16. Widerstand 17. Ausstanzung16. Resistance 17. Die cut
18. Brückenstege18. Bridges
19. Hall-IC19. Hall IC
20. erste Ebene20. first level
21. zweite Ebene 22. Federclip21. second level 22. spring clip
23. Knick23rd kink
24. Kondensator 24. capacitor

Claims

Patentansprüche claims
1. Elektrisch betriebener Motor (1) mit einer Welle (4), deren Drehzahl mittels eines dieser zugeordneten Hall-Sensors (10) abgreifbar ist, der an einem Trägerelement (13) aufgenommen ist, welches an einem Bauteil (8) des elektrisch betriebenen Motors (1) befestigt ist und am Trägerelement (13) elektrische Leiter (18) ausgebildet und das Trägerelement (13) mit elektrischen Bauteilen (15, 16, 24) bestückbar ist, dadurch gekennzeichnet, daß das Trägerelement (13) als Stanzgitter ausgebildet ist, auf dem zumindest ein Hall-Element (19) zum Drehzahlabgriff integriert ist.1. Electrically operated motor (1) with a shaft (4), the speed of which can be tapped by means of a Hall sensor (10) assigned to it, which is received on a carrier element (13) which is attached to a component (8) of the electrically operated Motor (1) is fastened and electrical conductors (18) are formed on the carrier element (13) and the carrier element (13) can be equipped with electrical components (15, 16, 24), characterized in that the carrier element (13) is designed as a lead frame , on which at least one Hall element (19) for tapping the speed is integrated.
2. Elektrisch betriebener Motor nach Anspruch 1, dadurch gekennzeichnet, daß das Stanzgitter (13) als gestanztes, mit Ausstanzungen versehenes Blechteil2. Electrically operated motor according to claim 1, characterized in that the lead frame (13) as a stamped, provided with punched sheet metal part
(13) ausgebildet ist.(13) is formed.
3. Elektrisch betriebener Motor nach Anspruch 1, dadurch gekennzeichnet, daß das das Stanzgitter (13) aufnehmende Bauteil der Bürstenhalter (8) des Motors (1) ist.3. Electrically operated motor according to claim 1, characterized in that the lead frame (13) receiving component of the brush holder (8) of the motor (1).
4. Elektrisch betriebener Motor nach Anspruch 1 , dadurch gekennzeichnet, daß das Hall-IC (19) parallel zur Achse der Welle (4) angeordnet ist.4. Electrically operated motor according to claim 1, characterized in that the Hall IC (19) is arranged parallel to the axis of the shaft (4).
5. Elektrisch betriebener Motor nach Anspruch 1, dadurch gekennzeichnet, daß das Hall-Element (19) mittels SMD-Verfahren auf das Stanzgitter (13) aufgebracht ist.5. Electrically operated motor according to claim 1, characterized in that the Hall element (19) is applied to the lead frame (13) by means of SMD methods.
6. Elektrisch betriebener Motor nach Anspruch 1 , dadurch gekennzeichnet, daß die elektrisch leitenden Verbindungen am Stanzgitter (13) durch Brückenstege6. Electrically operated motor according to claim 1, characterized in that the electrically conductive connections on the lead frame (13) by bridge webs
(18) gebildet sind. (18) are formed.
7. Elektrisch betriebener Motor nach Anspruch 1 , dadurch gekennzeichnet, daß das Stanzgitter (13) nach SMD-Verfahren mit elektrischen Widerständen (15, 16) bestückt ist.7. Electrically operated motor according to claim 1, characterized in that the lead frame (13) is equipped with electrical resistors (15, 16) according to the SMD method.
8. Elektrisch betriebener Motor nach Anspruch 1, dadurch gekennzeichnet, daß das Stanzgitter (13) mit Kondensatoren (24) und/oder Transistoren bestückbar ist. 8. Electrically operated motor according to claim 1, characterized in that the lead frame (13) with capacitors (24) and / or transistors can be fitted.
EP01909481A 2000-02-01 2001-01-17 Stamped grid with an integrated hall sensor for rotational speed pick-off Withdrawn EP1216496A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10004310 2000-02-01
DE2000104310 DE10004310A1 (en) 2000-02-01 2000-02-01 Electric motor for electric windows in motor vehicles, uses carrier element designed as blanking lattice for mounting Hall sensor for motor speed sensing
PCT/DE2001/000169 WO2001057990A1 (en) 2000-02-01 2001-01-17 Stamped grid with an integrated hall sensor for rotational speed pick-off

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EP1216496A1 true EP1216496A1 (en) 2002-06-26

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EP (1) EP1216496A1 (en)
DE (1) DE10004310A1 (en)
WO (1) WO2001057990A1 (en)

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Publication number Priority date Publication date Assignee Title
DE10315871A1 (en) * 2003-04-08 2004-10-21 Ina-Schaeffler Kg Brushless DC motor (BLDC motor)
DE102008053573B4 (en) * 2008-10-15 2022-06-15 Bühler Motor GmbH Actuator for operating a linear unit
DE102016101881B4 (en) * 2016-02-03 2024-05-29 Pierburg Gmbh Actuator and method for producing such an actuator

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US4783906A (en) * 1985-11-12 1988-11-15 Amp Incorporated Method of making a customizable electrical article
JPH04295263A (en) * 1991-03-25 1992-10-20 Matsushita Electric Ind Co Ltd Brushless motor
DE4226553A1 (en) * 1992-08-11 1994-02-17 Teves Gmbh Alfred Brush holders for electric motors
DE4404986B4 (en) * 1994-02-17 2008-08-21 Robert Bosch Gmbh Device for contacting electrical conductors and method for producing such a device
US5446326A (en) * 1994-05-04 1995-08-29 Barber-Colman Company Vending machine gearmotor
US5770902A (en) * 1995-11-02 1998-06-23 Globe Motors Motor termination board
GB9715338D0 (en) * 1997-07-21 1997-09-24 Amp Holland A unit for controlling electrical motors

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