WO2001056137A1 - Device for supporting the self-locking function of electric motors - Google Patents

Device for supporting the self-locking function of electric motors Download PDF

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Publication number
WO2001056137A1
WO2001056137A1 PCT/DE2001/000144 DE0100144W WO0156137A1 WO 2001056137 A1 WO2001056137 A1 WO 2001056137A1 DE 0100144 W DE0100144 W DE 0100144W WO 0156137 A1 WO0156137 A1 WO 0156137A1
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WO
WIPO (PCT)
Prior art keywords
self
drivers
locking
armature
armature shaft
Prior art date
Application number
PCT/DE2001/000144
Other languages
German (de)
French (fr)
Inventor
Hans-Juergen Oberle
Willi Schmidt
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 WO2001056137A1 publication Critical patent/WO2001056137A1/en

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Classifications

    • 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
    • H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/665—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings
    • E05F15/689—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings specially adapted for vehicle windows
    • E05F15/697—Motor units therefor, e.g. geared motors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F11/00—Man-operated mechanisms for operating wings, including those which also operate the fastening
    • E05F11/38—Man-operated mechanisms for operating wings, including those which also operate the fastening for sliding windows, e.g. vehicle windows, to be opened or closed by vertical movement
    • E05F11/50—Crank gear with clutches or retaining brakes, for operating window mechanisms
    • E05F11/505—Crank gear with clutches or retaining brakes, for operating window mechanisms for vehicle windows
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Type of wing
    • E05Y2900/55—Windows
    • 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

Definitions

  • the invention relates to a device for supporting self-locking in electric motors, such as in adjusting motors with gears for applications in motor vehicles, e.g. for use as, window regulator, sunroof actuation, seat adjustment and mirror adjustment.
  • adjusting motors for such applications, certain actuating positions are approached, which are then to be maintained by the self-locking inherent in the actuating motors until the next actuating process takes place.
  • the self-locking acts directly on the armature shaft of the adjusting motor, where the greatest effect can be achieved.
  • Extremely advantageous is the fact that when the servomotor is energized, the self-locking is immediately canceled by the rotation of the armature shaft and no influence of the mechanics which reduces the tightening torque of the servomotor can occur through direct release of the armature shaft.
  • an adjusting motor with an 8-groove armature there are eight possible positions in such an electric motor, to which it is located because of the magnetic field of the opposing ones Can set permanent magnets.
  • a certain torque, the cogging torque is required, which is used in the invention as a restoring torque for the motor that is not energized.
  • the restoring torque which acts on the armature shaft of the adjustment motor, moves the drivers articulated on the armature shaft into their extended position, so that they rest on the inside of the gear housing connected to the motor housing.
  • the self-locking connection which is established between the caps of the drivers and the inside of the gearbox housing can be a frictional, a positive or a non-positive connection which is automatically set by the detent torque when the adjustment motor is not energized. If self-locking is supported in this way, the armature shaft, i.e. the drive shaft is rotated in its position last approached when operating the adjustment motor.
  • the approach position is secured and maintained by the self-locking between the driver heads and the inside of the gear housing, so that, for example, in the case of worm gears assigned to the adjusting motor, the pitch of the worm is no longer important for achieving self-locking, but the pitch of the worm can be designed, for example, that the operating position can be reached within a very short time when operating the adjusting motor.
  • two drivers which are arranged opposite one another can be provided, but three drivers which are offset by 120 ° to one another or four drivers which are offset by 90 ° to one another can also be articulated on the armature shaft. This ensures reliable guidance, which leads to the removal of the self-locking connection between the driver heads and the inside of the gearbox housing when the adjustment motor is energized ensures that the drivers are movably mounted in a rigidly attached driving bell provided on the drive shaft.
  • Fig. 1 shows a longitudinal section through the actuator and gear with separate input / output shafts.
  • Fig. 1 shows the longitudinal section through the adjusting motor and gear with an interrupted input / output shaft.
  • the adjusting motor 1 comprises a motor housing 2, in which the armature shaft 5, which acts as a drive shaft, is mounted.
  • the armature shaft 5 is in one hand a bearing 6 provided at the end of the motor housing 2; with the other end, the armature shaft 5 is received in a spherical bearing 7.
  • the motor housing 2 merges into the gear housing 20 in which the output shaft 8 is received and forms a compact motor / gear unit with it.
  • the output shaft 8 in turn is received in a bearing 9 of the transmission and has a driving bell 13 at its end facing the armature shaft 5.
  • the driving bell 13 is rigidly connected to the end of the output shaft 8, while the drivers 12 guided in the driving bell 13 are articulated on the circumference of the armature shaft 5.
  • two drivers 12 are shown offset from one another by 180 °, the respective heads of which rest against the inside of the transmission housing 20 and effect a self-locking connection there.
  • the armature of the armature shaft 5 is designed as an 8-groove armature, the individual segments of which are each connected to a commutator 11, which is also located on the armature shaft 5.
  • Fig. 2 shows the drive or armature shaft with articulated drivers, which are placed in a stretched, self-locking position of the armature shaft.
  • Permanent magnets 15 and 16, respectively, are located opposite one another in the pole housing 17 and servomotor housing 2 of the servomotor 1.
  • an 8-groove anchor is accommodated on the armature shaft 5, which consists of eight individual anchor packages 19, all of which are separated from one another by a groove. Only six of the eight individual segments 19 are shown in FIG. 2, two segments 19 lying opposite one another are covered by the driving bell 13 lying in front of them in the cross-sectional illustration and the gear housing 20.
  • two mutually articulated drivers 12 are provided on the circumference of the armature shaft 5, two mutually articulated drivers 12 are provided.
  • the drivers 12 extend through recesses 22 of the driving bell 13 and are shown lying in their extended position 26 in FIG. 2.
  • the drivers 12 are brought into their extended position 24, in which the driver heads in the exemplary embodiment shown have toothed peripheral surfaces - producing a self-locking connection 21.
  • the driver heads can also be provided with a friction surface which cooperate with a friction partner rotating on the inside of the transmission housing 20.
  • a frictional or a positive self-locking connection 21 in the form of interlocked toothed segments a relatively high torque must be applied on the output side due to the prevailing lever ratios in order to unlock the armature shaft 5 from its self-locking.
  • the armature shaft 5 rotating about its axis of rotation 23 receives the drivers - in the exemplary embodiment 2 - in articulation points 14.
  • the openings 22 in the driving bell 13 act as a guide for the drivers 12.
  • the pivot point of the drivers 12 has the same position as the center of a partial segment 18 of the armature package 19, so that the same restoring force is applied in both directions.
  • Fig. 3 shows the removal of the self-locking connection when energizing the armature shaft of the adjusting motor.
  • the hatched armature package 18 has moved clockwise, caused by the drive torque 25 now applied to the armature shaft 5.
  • the rotation of the armature shaft 5 about its axis of rotation 23 by approximately 20 ° causes the self-locking connection 28 to be canceled a retraction of the drivers 12 into the recesses 22 of the driving bell 13, which in turn is rigidly connected to the output shaft 8.
  • the retraction of the drivers 12 is caused by the displacement of their articulation points 14 when the armature shaft 5 is rotated clockwise, as a result of which the driver heads are disengaged from the inside of the transmission housing 20.
  • the drive torque 25 is transmitted to the output shaft 8 with the device according to the invention without any frictional losses.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to a device for supporting the self-locking function of an adjusting motor (1). Said device is linked with a drive-side rotor shaft (5) that interacts on the output side with an output shaft (8) of a transmission, and the motor housing (2) of the adjusting motor (1) is linked with the transmission housing (20) of the transmission. Followers (12) are articulated to the rotor shaft (5) of the adjusting motor (1), said followers establishing and releasing the self-locking connection (21) with the transmission housing (20).

Description

Vorrichtung zur Unterstützung der Selbsthemmung bei ElektromotorenDevice for supporting self-locking in electric motors
Technisches GebietTechnical field
Die Erfindung bezieht sich auf eine Vorrichtung zur Unterstützung der Selbsthemmung bei Elektromotoren, wie beispielsweise in Versteilmotoren mit Getrieben für Anwendungen im Kraftfahrzeug z.B. für den Einsatz als, Fensterheber, Schiebedachbetätigung, Sitzverstellung und Spiegelverstellung. Bei Versteilmotoren für solche Anwendungen werden bestimmte Stellpositionen angefahren, die dann durch die den Verstellmotoren innewohnende Selbsthemmung beibehalten werden sollen, bis der nächste Stellvorgang erfolgt.The invention relates to a device for supporting self-locking in electric motors, such as in adjusting motors with gears for applications in motor vehicles, e.g. for use as, window regulator, sunroof actuation, seat adjustment and mirror adjustment. In the case of adjusting motors for such applications, certain actuating positions are approached, which are then to be maintained by the self-locking inherent in the actuating motors until the next actuating process takes place.
Stand der TechnikState of the art
Bei Getriebemotoren kommt es in der Regel dann zur Selbsthemmung, wenn der Getriebemotor über ein Schneckengetriebe verfugt, dessen eingängige Schnecke einen Neigungswinkel von <4° aufweist. Die Schnecke weist demnach eine relativ schwache Steigung auf, was in der Praxis jedoch nicht immer erwünscht ist, weil die schwache Steigung relativ lange Verfahrwege zur Folge hat. Aufgrund der flachen Steigung der Schnecke sind viele Umdrehungen der Schnecke erforderlich, um ausreichend lange Verstellwege zu erzielen.In the case of geared motors, self-locking usually occurs when the geared motor has a worm gear, the single-start worm of which has an inclination angle of <4 °. The screw therefore has a relatively weak slope, which is not always desirable in practice, however, because the weak slope results in relatively long travel distances. Due to the flat pitch of the screw, many turns of the screw are required to achieve sufficiently long adjustment distances.
Bei Verstellmotoren mit Schneckenauslegungen einer Steigung von >4° kommt es nach längeren Zeiträumen zum sogenannten „Ablaufen" des Sitzes beispielsweise, d.h. der Sitz verändert seine Position, ohne daß der Verstellmotor betätigt worden ist, da das eingesetzte Getriebe nicht absolut selbsthemmend ist und eine einmal eingestellte vorgewählte Position nicht dauerhaft beibehält.In the case of adjustment motors with screw designs with an incline of> 4 °, the seat "runs down" after longer periods, for example, ie the seat changes its position without the adjustment motor having been actuated is because the gearbox used is not absolutely self-locking and does not maintain a pre-selected position once it has been set.
Es wurde versucht, die Selbsthemmung von Verstellmotoren dadurch zu ver- bessern, daß der Druck der Kohlebürsten auf den Kommutator erhöht wurde, um so das von außen aufzubringende Moment, den Anker zu verdrehen, zu erhöhen. Nachteile dabei sind, daß einerseits das Geräuschniveau solcher Verstellmotoren ansteigt und sich andererseits aufgrund der erhöhten Bürstenreibung das Anzugsmoment drastisch verschlechtert. Es wurden Überlegungen dahingehend angestellt, daß an der Ankerwelle des Versteilmotors eine magnetische Bremse vorgesehen wird, die mit Einschalten des Motorstroms öffnet. Diese Lösung ist jedoch teurer und zieht einen zusätzlichen Energieaufwand nach sich.Attempts have been made to improve the self-locking of adjusting motors by increasing the pressure of the carbon brushes on the commutator, in order to increase the torque to be exerted from outside to twist the armature. Disadvantages are that on the one hand the noise level of such adjusting motors increases and on the other hand the tightening torque deteriorates drastically due to the increased brush friction. Considerations were made that a magnetic brake is provided on the armature shaft of the adjusting motor, which opens when the motor current is switched on. However, this solution is more expensive and requires additional energy.
Darstellung der ErfindungPresentation of the invention
Mit der erfindungsgemäß vorgeschlagenen Vorrichtung zur Unterstützung der Selbsthemmung bei Verstellmotoren greift die Selbsthemmung unmittelbar an der Ankerwelle des Verstellmotors an, wo die größte Wirkung erzielt werden kann. Extrem vorteilhaft ist der Umstand, daß beim Bestromen des Verstellmotors die Selbsthemmung durch die Verdrehung der Ankerwelle sofort aufgehoben wird und keine das Anzugsmoment des Verstellmotors mindernder Einfluß der Mechanik durch direkte Freigabe der Ankerwelle auftreten kann.With the device proposed according to the invention for supporting the self-locking in the case of adjusting motors, the self-locking acts directly on the armature shaft of the adjusting motor, where the greatest effect can be achieved. Extremely advantageous is the fact that when the servomotor is energized, the self-locking is immediately canceled by the rotation of the armature shaft and no influence of the mechanics which reduces the tightening torque of the servomotor can occur through direct release of the armature shaft.
Mit der erfindungsgemäßen Lösung wird in vorteilhafter Weise vermieden, von außen wirkende zusätzliche Kräfte auf die Ankerwelle einwirken zu lassen, sondern aufgrund der im Verstellmotor vorhandenen Permanentmagnete ein auf den Anker wirkendes Rastmoment zur Selbsthemmung auszunutzen.With the solution according to the invention, it is advantageously avoided to allow external forces acting on the armature shaft to act from the outside, but to utilize a detent torque acting on the armature for self-locking due to the permanent magnets present in the adjusting motor.
Bei der Ausbildung eines Verstellmotors mit 8-nutigem Anker ergeben sich bei einem solcherart ausgestalteten Elektromotor acht mögliche Positionen, auf die er sich aufgrund des Magnetfeldes der einander gegenüberliegend angeordneten Permanentmagneten einzustellen vermag. Um den Anker von einer Drehposition in die nächstmögliche Drehposition zu bewegen, ist ein bestimmtes Drehmoment, das Rastmoment erforderlich, welches bei der Erfindung als Rückstellmoment für den nicht bestromten Motor genutzt wird. Das Rückstellmoment, welches auf die Ankerwelle des Verstellmotors einwirkt, bewegt die an der Ankerwelle gelenkig aufgenommenen Mitnehmer in ihre gestreckte Lage, so daß diese an der Innenseite des mit dem Motorgehäuse verbundenen Getriebegehäuses anliegen.When an adjusting motor with an 8-groove armature is formed, there are eight possible positions in such an electric motor, to which it is located because of the magnetic field of the opposing ones Can set permanent magnets. In order to move the armature from a rotational position into the next possible rotational position, a certain torque, the cogging torque, is required, which is used in the invention as a restoring torque for the motor that is not energized. The restoring torque, which acts on the armature shaft of the adjustment motor, moves the drivers articulated on the armature shaft into their extended position, so that they rest on the inside of the gear housing connected to the motor housing.
Die sich zwischen den Kappen der Mitnehmer und der Innenseite des Getriebe- gehäuses einstellende selbsthemmende Verbindung kann eine reibschlüssige, eine formschlüssige oder auch eine kraftschlüssige Verbindung sein, die sich automatisch bei nicht bestromtem Verstellmotor durch dessen Rastmoment einstellt. Wird eine Selbsthemmung auf diese Weise unterstützt, ist die Ankerwelle, d.h. die Antriebswelle in ihrer beim Betrieb des Verstellmotors zuletzt angefahrenen Position gedreht. Die angefahrene Stellposition wird durch die sich einstellende Selbsthemmung zwischen Mitnehmerköpfen und Getriebegehäuseinnenseite gesichert und beibehalten, so daß beispielsweise bei dem Verstellmotor zugeordneten Schneckengetrieben die Steigung der Schnecke zur Erzielung einer Selbsthemmung nicht mehr von Belang ist, sondern die Steigung der Schnecke beispielsweise so ausgelegt werden kann, daß bei Betreiben des Verstellmotors die Stellposition innerhalb kürzester Zeit Stellpositionen angefahren werden können.The self-locking connection which is established between the caps of the drivers and the inside of the gearbox housing can be a frictional, a positive or a non-positive connection which is automatically set by the detent torque when the adjustment motor is not energized. If self-locking is supported in this way, the armature shaft, i.e. the drive shaft is rotated in its position last approached when operating the adjustment motor. The approach position is secured and maintained by the self-locking between the driver heads and the inside of the gear housing, so that, for example, in the case of worm gears assigned to the adjusting motor, the pitch of the worm is no longer important for achieving self-locking, but the pitch of the worm can be designed, for example, that the operating position can be reached within a very short time when operating the adjusting motor.
An der Ankerwelle der Verstellmotors lassen sich zwei einander gegenüber- liegend angebrachte Mitnehmer vorsehen, es können jedoch auch drei um 120° zueinander versetzte oder vier um 90° zueinander versetzte Mitnehmer an der Ankerwelle gelenkig gelagert werden. Eine sichere Führung, die bei Bestromen des Verstellmotors unmittelbar zur Aufhebung der selbsthemmenden Verbindung zwischen Mitnehmerköpfen und Getriebegehäuseinnenseite fuhrt, ist dadurch sichergestellt, daß die Mitnehmer in einer an der Antriebswelle vorgesehenen starr befestigten Mitnahmeglocke beweglich gelagert sind.On the armature shaft of the adjustment motor, two drivers which are arranged opposite one another can be provided, but three drivers which are offset by 120 ° to one another or four drivers which are offset by 90 ° to one another can also be articulated on the armature shaft. This ensures reliable guidance, which leads to the removal of the self-locking connection between the driver heads and the inside of the gearbox housing when the adjustment motor is energized ensures that the drivers are movably mounted in a rigidly attached driving bell provided on the drive shaft.
Zeichnungdrawing
Anhand der Zeichnung wird die Erfindung nachstehend näher erläutert.The invention is explained in more detail below with the aid of the drawing.
Es zeigt:It shows:
Fig. 1 einen Längsschnitt durch Verstellmotor und Getriebe mit getrennten Antriebs-/ Abtriebswellen.Fig. 1 shows a longitudinal section through the actuator and gear with separate input / output shafts.
Fig. 2 die Ankerwelle mit gelenkig daran gelagerten Mitnehmern, die in eine gestreckte, eine Selbsthemmung der Ankerwelle bewirkende Position gedreht ist,2 shows the armature shaft with articulated drivers, which is rotated into an extended position which causes the armature shaft to self-lock,
Fig. 3 und die Aufhebung der selbsthemmenden Verbindung bei Bestromen der Ankerwelle des Verstellmotors.Fig. 3 and the removal of the self-locking connection when energizing the armature shaft of the adjusting motor.
Ausfuhrungsvarianten:design variants:
Fig. 1 zeigt den Längsschnitt durch Verstellmotor und Getriebe mit unterbrochener An-/ Abtriebswelle.Fig. 1 shows the longitudinal section through the adjusting motor and gear with an interrupted input / output shaft.
Der Verstellmotor 1 umfaßt ein Motorgehäuse 2, in welchem die als Antriebswelle fungierende Ankerwelle 5 gelagert ist. Die Ankerwelle 5 ist einerseits in einem am Ende des Motorgehäuses 2 vorgesehenen Lager 6 aufgenommen; mit dem anderen Ende ist die Ankerwelle 5 in ein Kalottenlager 7 aufgenommen. Das Motorgehäuse 2 geht in das Getriebegehäuse 20 über, in dem die Abtriebswelle 8 aufgenommen ist und bildet mit diesem eine kompaktbauende Motor/Ge- triebeeinheit. Die Abtriebswelle 8 ihrerseits ist in einem Lager 9 des Getriebes aufgenommen und weist an ihrem der Ankerwelle 5 zuweisenden Ende eine Mitnahmeglocke 13 auf. Die Mitnahmeglocke 13 ist starr mit dem Ende der Abtriebswelle 8 verbunden, während die in der Mitnahmeglocke 13 geführten Mitnehmer 12 gelenkig am Umfang der Ankerwelle 5 gelagert sind. Im darge- stellten Ausführungsbeispiel sind zwei um 180° zueinander versetzt angeordnete Mitnehmer 12 dargestellt, deren jeweilige Köpfe an der Innenseite des Getriebegehäuses 20 anliegen und dort eine selbsthemmende Verbindung bewirken.The adjusting motor 1 comprises a motor housing 2, in which the armature shaft 5, which acts as a drive shaft, is mounted. The armature shaft 5 is in one hand a bearing 6 provided at the end of the motor housing 2; with the other end, the armature shaft 5 is received in a spherical bearing 7. The motor housing 2 merges into the gear housing 20 in which the output shaft 8 is received and forms a compact motor / gear unit with it. The output shaft 8 in turn is received in a bearing 9 of the transmission and has a driving bell 13 at its end facing the armature shaft 5. The driving bell 13 is rigidly connected to the end of the output shaft 8, while the drivers 12 guided in the driving bell 13 are articulated on the circumference of the armature shaft 5. In the exemplary embodiment shown, two drivers 12 are shown offset from one another by 180 °, the respective heads of which rest against the inside of the transmission housing 20 and effect a self-locking connection there.
Innerhalb des Motorgehäuses 2 des Verstellmotors 1 sind die einander gegenüber- liegenden Permanentmagnete 15, 16 dargestellt, zwischen denen die Wicklung 10 der Ankerwelle 15 zu erkennen ist. Der Anker der Ankerwelle 5 ist im Ausführungsbeispiel gemäß Fig. 1 als 8-nutiger Anker ausgebildet, dessen einzelne Segmente jeweils mit einem Kommutator 11 verbunden sind, der sich ebenfalls auf der Ankerwelle 5 befindet.The permanent magnets 15, 16, which lie opposite one another and between which the winding 10 of the armature shaft 15 can be seen, are shown within the motor housing 2 of the adjusting motor 1. In the exemplary embodiment according to FIG. 1, the armature of the armature shaft 5 is designed as an 8-groove armature, the individual segments of which are each connected to a commutator 11, which is also located on the armature shaft 5.
Durch die Unterbrechung von Antriebs- bzw. Ankerwelle 5 und Abtriebswelle 8 läßt sich in diesem Bereich eine mechanisch wirkende Selbsthemmungsvorrichtung einbauen, die ein unbeabsichtigtes Verstellen der durch den Verstellmotor 1 angefahrenen Positionen wirksam verhindert.By interrupting the drive or armature shaft 5 and output shaft 8, a mechanically acting self-locking device can be installed in this area, which effectively prevents unintentional adjustment of the positions approached by the adjustment motor 1.
Fig. 2 zeigt die Antriebs- bzw. Ankerwelle mit gelenkig daran gelagerten Mitnehmern, die in eine gestreckte, eine Selbsthemmung der Ankerwelle bewirkende Position gestellt sind. Im Polgehäuse 17 bzw. Verstellmotorgehäuse 2 des Verstellmotors 1 sind einander gegenüberliegende Permanentmagnete 15 bzw. 16 untergebracht. Zwischen diesen ist im Ausführungsbeispiel gemäß Fig. 2 ein 8-nutiger Anker auf der Ankerwelle 5 untergebracht, der aus' acht einzelnen Ankerpaketen 19 besteht, die allesamt durch eine Nut voneinander getrennt sind. Von den acht einzelnen Segmenten 19 sind in Fig. 2 nur sechs dargestellt, zwei einander gegenüberliegende Segmente 19 sind durch die in der Querschnittsdarstellung vor diesen liegenden Mitnahmeglocke 13 sowie das Getriebegehäuse 20 verdeckt. Am Umfang der Ankerwelle 5 sind zwei einander gegenüberliegend gelenkig gelagerte Mitnehmer 12 vorgesehen. Die Mitnehmer 12 erstrecken sich durch Ausnehmungen 22 der Mitnahmeglocke 13 und sind in Fig. 2 in ihrer gestreckten Position 26 liegend dargestellt. Durch das mittels der Permanentmagnete 15 bzw. 16 aufgebrachte Rückstellmoment 24 werden die Mitnehmer 12 in ihre gestreckte Position 24 gebracht, in der die Mitnehmerköpfe im dargestellten Ausführungs- beispiel mit gezahnten Umfangsflächen versehen - eine selbsthemmende Verbindung 21 erzeugend -. Anstelle des in Fig. 2 in vergrößerter Darstellung wiedergegebenen profilierten Kopfes der Mitnehmer können die Mitnehmerköpfe auch mit einer Reibfläche versehen sein, die mit einem an der Innenseite des Getriebegehäuses 20 umlaufenden Reibpartner zusammenarbeiten.Fig. 2 shows the drive or armature shaft with articulated drivers, which are placed in a stretched, self-locking position of the armature shaft. Permanent magnets 15 and 16, respectively, are located opposite one another in the pole housing 17 and servomotor housing 2 of the servomotor 1. Between them, in the exemplary embodiment according to FIG. 2, an 8-groove anchor is accommodated on the armature shaft 5, which consists of eight individual anchor packages 19, all of which are separated from one another by a groove. Only six of the eight individual segments 19 are shown in FIG. 2, two segments 19 lying opposite one another are covered by the driving bell 13 lying in front of them in the cross-sectional illustration and the gear housing 20. On the circumference of the armature shaft 5, two mutually articulated drivers 12 are provided. The drivers 12 extend through recesses 22 of the driving bell 13 and are shown lying in their extended position 26 in FIG. 2. By means of the restoring moment 24 applied by means of the permanent magnets 15 and 16, the drivers 12 are brought into their extended position 24, in which the driver heads in the exemplary embodiment shown have toothed peripheral surfaces - producing a self-locking connection 21. Instead of the profiled head of the drivers shown in an enlarged representation in FIG. 2, the driver heads can also be provided with a friction surface which cooperate with a friction partner rotating on the inside of the transmission housing 20.
Besteht wie in Fig. 2 dargestellt, eine reibschlüssige oder eine formschlüssige selbsthemmende Verbindung 21 in Form von miteinander verrasteten Zahnsegmenten, muß aufgrund der herrschenden Hebelverhältnisse abtriebsseitig ein relativ hohes Drehmoment aufgebracht werden, um die Ankerwelle 5 aus ihrer Selbsthemmung zu entriegeln. Aus Fig. 2 geht hervor, daß die um ihre Rotationsachse 23 rotierende Ankerwelle 5 die Mitnehmer - im Ausfuhrungsbeispiel 2 - in Anlenkpunkten 14 aufnimmt. Die Durchbrüche 22 in der Mitnahmeglocke 13 fungieren als Führung für die Mitnehmer 12. Der Drehpunkt der Mitnehmer 12 hat die gleiche Position wie die Mitte eines Teilsegmentes 18 des Ankerpaketes 19, so daß die gleiche Rückstellkraft in beiden Richtungen anliegt. Fig. 3 zeigt die Aufhebung der selbsthemmenden Verbindung beim Bestromen der Ankerwelle des Verstellmotors.If there is, as shown in Fig. 2, a frictional or a positive self-locking connection 21 in the form of interlocked toothed segments, a relatively high torque must be applied on the output side due to the prevailing lever ratios in order to unlock the armature shaft 5 from its self-locking. From FIG. 2 it can be seen that the armature shaft 5 rotating about its axis of rotation 23 receives the drivers - in the exemplary embodiment 2 - in articulation points 14. The openings 22 in the driving bell 13 act as a guide for the drivers 12. The pivot point of the drivers 12 has the same position as the center of a partial segment 18 of the armature package 19, so that the same restoring force is applied in both directions. Fig. 3 shows the removal of the self-locking connection when energizing the armature shaft of the adjusting motor.
Durch Bestromung des Verstellmotors 1 hat sich das schraffiert dargestellte Ankerpaket 18 im Uhrzeigersinn bewegt, verursacht durch das nunmehr an der Ankerwelle 5 anliegende Antriebsmoment 25. Die Verdrehung der Ankerwelle 5 um ihre Rotationsachse 23 um ca. 20° bewirkt die Aufhebung der selbsthemmenden Verbindung 28 durch ein Zurückfahren der Mitnehmer 12 in die Aus- nehmungen 22 der Mitnahmeglocke 13, die ihrerseits starr mit der Abtriebswelle 8 verbunden ist. Das Zurückfahren der Mitnehmer 12 wird durch die Verlagerung ihrer Anlenkpunkte 14 bei der Verdrehung der Ankerwelle 5 im Uhrzeigersinn verursacht, wodurch die Mitnehmerköpfe mit der Innenseite des Getriebegehäuses 20 außer Eingriff gebracht werden. Die nunmehr in die Ausnehmungen 22 der Mitnahmeglocke 13 eingreifenden Köpfe der Mitnehmer 12 - seien sie mit Zahnsegmenten profiliert oder als Reibflächen oder dergleichen ausgebildet - übertragen das Antriebsmoment 25 der Ankerwelle 5 auf die abtriebsseitig vorgesehene Mitnahmeglocke 13, die mit der Abtriebswelle 8 in Verbindung steht. Das Antriebsmoment 25 wird im Gegensatz zu dem eingangs erwähnten mit hohem Druck an den Kommutator angestellten Bürsten mit der erfindungsgemäßen Vorrichtung ohne Reibungsverluste auf die Abtriebswelle 8 übertragen.By energizing the adjusting motor 1, the hatched armature package 18 has moved clockwise, caused by the drive torque 25 now applied to the armature shaft 5. The rotation of the armature shaft 5 about its axis of rotation 23 by approximately 20 ° causes the self-locking connection 28 to be canceled a retraction of the drivers 12 into the recesses 22 of the driving bell 13, which in turn is rigidly connected to the output shaft 8. The retraction of the drivers 12 is caused by the displacement of their articulation points 14 when the armature shaft 5 is rotated clockwise, as a result of which the driver heads are disengaged from the inside of the transmission housing 20. The heads of the drivers 12 now engaging in the recesses 22 of the driving bell 13 - be they profiled with toothed segments or designed as friction surfaces or the like - transmit the drive torque 25 of the armature shaft 5 to the driving bell 13 provided on the output side, which is connected to the output shaft 8. In contrast to the brushes mentioned above, which are applied to the commutator at high pressure, the drive torque 25 is transmitted to the output shaft 8 with the device according to the invention without any frictional losses.
Wird der Verstellmotor 1 abgeschaltet, und die Ankerwelle 5 kommt zum Stillstand, tritt der in Fig. 2 dargestellte Zustand ein, das Rückstellmoment der Permanentmagnete 15, 16 bewegt die an der Ankerwelle 5 angelenkten Mitnehmer 12 in ihre jeweils gestreckte Position 26 zur Erzeugung einer die Selbsthemmung unterstützenden Verbindung 21. Steht der Abtrieb unter Last, köm en kurzfristig Zustände auftreten, bei denen die Mitnehmer 12 noch nicht an der Innenseite des Getriebsgehäuses 20 eingreifen. Die Sperrfunktion tritt jedoch dann ein, wenn sich der Abtrieb soweit zurückgestellt hat, daß eine Rastposition erreicht wird etwa ein 20°- Drehung. Da es sich hierbei um den Bruchteil einer Ankerumdrehung handelt, ist diese leichte Verzögerung durch Einstellen der Selbsthemmung bei übersetzten Getrieben kaum wahrnehmbar. If the adjusting motor 1 is switched off and the armature shaft 5 comes to a standstill, the state shown in FIG. 2 occurs, the restoring torque of the permanent magnets 15, 16 moves the drivers 12 articulated on the armature shaft 5 into their respective extended positions 26 to generate a Self-locking support connection 21. If the output is under load, conditions can occur briefly in which the drivers 12 do not yet engage on the inside of the transmission housing 20. However, the locking function occurs when the output has been reset so far that a rest position a 20 ° turn is achieved. Since this is a fraction of an armature revolution, this slight delay due to the setting of the self-locking effect on the gearboxes is hardly noticeable.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
1 Verstellmotor 15 Permanentmagnet1 actuator 15 permanent magnet
2 Motorgehäuse 16 Permanentmagnet2 motor housing 16 permanent magnet
3 Antriebsseite 17 Polgehäuse3 Drive side 17 pole housing
4 Abtriebsseite 18 Keilsegment4 output side 18 wedge segment
5 Antriebs-, Ankerwelle 19 Ankerpaket (8-nutig)5 drive and armature shaft 19 armature package (8-slot)
6 Lager 20 Getriebegehäuse6 bearings 20 gearbox
7 Kalottenlager 21 selbsthemmende Verbindung7 spherical bearing 21 self-locking connection
8 Abtriebswelle 22 Ausnehmung8 output shaft 22 recess
9 Lager 23 Rotationsachse Ankerwelle9 bearing 23 axis of rotation armature shaft
10 Wicklung 24 Rückstellmomente MR10 winding 24 restoring moments MR
11 Kommutator 25 Antriebsmoment MA11 commutator 25 drive torque MA
12 Mitnehmer 26 gestreckte Mitnehmerlage12 drivers 26 extended driver position
13 Mitnahmeglocke 27 gelöste Mitnehmerlage13 driving bell 27 loosened driving position
14 Anlenkpunkte 28 aufgehobene selbsthemmende Verbindung 14 articulation points 28 self-locking connection

Claims

Patentansprüche claims
1. Vorrichtung zur Unterstützung der Selbsthemmung eines Verstellmotors (1) mit einer antriebsseitigen Ankerwelle (5), und die abtriebsseitig mit einer Abtriebswelle (8) eines Getriebes zusammenarbeitet und das1. Device for supporting the self-locking of a variable motor (1) with an input-side armature shaft (5), and which cooperates on the output side with an output shaft (8) of a transmission and that
Motorgehäuse (2) des Verstellmotors (1) mit dem Getriebegehäuse (20) des Getriebes verbunden ist, dadurch gekennzeichnet, daß an der Ankerwelle (5) des Verstellmotors (1) Mitnehmer (12) gelenkig gelagert sind, mit denen eine selbsthemmende Verbindung (21) mit dem Getriebegehäuse (20) herstellbar und wieder lösbar ist.Motor housing (2) of the adjustment motor (1) is connected to the transmission housing (20) of the transmission, characterized in that drivers (12) are articulated on the armature shaft (5) of the adjustment motor (1), with which a self-locking connection (21 ) can be produced with the gearbox housing (20) and can be detached again.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mitnehmer (12) antriebsseitig in Anlenkpunkten (14) der Ankerwelle (5) gelagert sind.2. Device according to claim 1, characterized in that the drivers (12) are mounted on the drive side in articulation points (14) of the armature shaft (5).
3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mitnehmer (12) abtriebsseitig in einer Mitnahmeglόcke (13) der Abtriebswelle (8) gelagert sind.3. Apparatus according to claim 1, characterized in that the drivers (12) on the output side in a Mitlageglόcke (13) of the output shaft (8) are mounted.
4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mitnehmer (12) durch einen Zwischenpermanentmagneten (15, 16) und Ankerpaketen (19) wirkendes Rückstellmoment (24) in eine gestreckte Mitnehmerlage (26) gebracht werden.4. The device according to claim 1, characterized in that the drivers (12) by an intermediate permanent magnet (15, 16) and armature packages (19) acting restoring moment (24) are brought into an extended driver position (26).
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß in der gesteckten Mitnehmerlage (26) zwischen Mitnehmern (12) und Getriebegehäuse (20) eine formschlüssige selbsthemmende Verbmdung (21) besteht. 5. The device according to claim 4, characterized in that there is a positive self-locking connection (21) in the inserted driver position (26) between drivers (12) and gear housing (20).
6. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß in der gestreckten Mitnehmerlage (26) zwischen Mitnehmer (12) und Getriebegehäuse (20) eine reibschlüssige selbsthemmende Verbindung (21) besteht.6. The device according to claim 4, characterized in that there is a frictional self-locking connection (21) in the extended driver position (26) between the driver (12) and gear housing (20).
7. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß in der gestreckten Mitnehmerlage (26) zwischen Mitnehmer (12) und Getriebegehäuse (20) eine kraftschlüssige selbsthemmende Verbindung (21) besteht.7. The device according to claim 4, characterized in that there is a non-positive self-locking connection (21) in the extended driver position (26) between the driver (12) and gear housing (20).
8. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Mitnehmer (12) in Ausnehmungen (22) am Umfang der Mitnahmeglocke (13) gefuhrt sind.8. The device according to claim 3, characterized in that the drivers (12) in recesses (22) on the circumference of the driving bell (13) are guided.
9. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Mitnahmeglocke (13) mit der Abtriebswelle (8) starr verbunden ist.9. The device according to claim 3, characterized in that the driving bell (13) with the output shaft (8) is rigidly connected.
10. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Mitnehmer (12) beim Bestromen des Verstellmotors (1) und Verdrehung der Ankerwelle (5) um 360°/Anzahl Ankersegmente die selbsthemmende10. The device according to claim 1, characterized in that the driver (12) when energizing the adjusting motor (1) and rotation of the armature shaft (5) by 360 ° / number of armature segments the self-locking
Verbindung (21) unterbrechen und das Antriebsmoment (25) über dieInterrupt connection (21) and drive torque (25) via
Mitnahmeglocke (13) auf die Abtriebswelle (8) übertragen.Transfer bell (13) to the output shaft (8).
11. Vorrichtung gemäß Anspruch 1, dadurch gekennzeichnet, daß an der Ankerwelle (5) mindestens zwei Mitnehmer (12) gelenkig gelagert sind. 11. The device according to claim 1, characterized in that on the armature shaft (5) at least two drivers (12) are articulated.
PCT/DE2001/000144 2000-01-27 2001-01-16 Device for supporting the self-locking function of electric motors WO2001056137A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10003512A DE10003512B4 (en) 2000-01-27 2000-01-27 Device for supporting self-locking in electric motors
DE10003512.4 2000-01-27

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WO2001056137A1 true WO2001056137A1 (en) 2001-08-02

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WO (1) WO2001056137A1 (en)

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DE102007044561C5 (en) * 2007-09-07 2014-05-08 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt Drive device for an adjusting device of a motor vehicle
DE202008000739U1 (en) * 2008-01-18 2009-05-28 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt Locking device for a drive system of an adjusting device of a motor vehicle
DE102012212020A1 (en) 2012-07-10 2014-01-16 Robert Bosch Gmbh Load torque lock for drive unit for performing e.g. window lifter drive in motor car, has housing with functional section that is spaced in drive case so that tape-like element is abutted against at output element

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GB1593628A (en) * 1977-08-09 1981-07-22 Bosch Gmbh Robert Self-locking drive device including an electric motor having a magnetic brake
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EP0559931A1 (en) * 1992-03-10 1993-09-15 Siemens Aktiengesellschaft Geared motor drive for automotive vehicles, in particular window-lifting drive

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GB1593628A (en) * 1977-08-09 1981-07-22 Bosch Gmbh Robert Self-locking drive device including an electric motor having a magnetic brake
EP0012250A1 (en) * 1978-12-14 1980-06-25 Robert Bosch Gmbh Drive mechanism for displacing window panes, sliding roofs and the like of motor vehicles
DE2911024A1 (en) * 1979-03-21 1980-09-25 Bosch Gmbh Robert Motor-driven window-pane adjusting mechanism - uses relative movement between dog clutch halves to release locking mechanism
US4652781A (en) * 1984-09-22 1987-03-24 Swf Auto-Electric Gmbh Drive unit for adjusting window panes, sunroofs, seats and similar motor vehicle parts
DE3442308A1 (en) * 1984-11-20 1986-05-22 INA Wälzlager Schaeffler KG, 8522 Herzogenaurach Drive device for displacing window panes, sliding roofs or the like in motor vehicles
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EP0559931A1 (en) * 1992-03-10 1993-09-15 Siemens Aktiengesellschaft Geared motor drive for automotive vehicles, in particular window-lifting drive

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DE10003512B4 (en) 2004-04-15

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