EP0440632B1 - A starter for internal combustion engines - Google Patents

A starter for internal combustion engines Download PDF

Info

Publication number
EP0440632B1
EP0440632B1 EP89906035A EP89906035A EP0440632B1 EP 0440632 B1 EP0440632 B1 EP 0440632B1 EP 89906035 A EP89906035 A EP 89906035A EP 89906035 A EP89906035 A EP 89906035A EP 0440632 B1 EP0440632 B1 EP 0440632B1
Authority
EP
European Patent Office
Prior art keywords
gear
ring
starter
shaft
ring gear
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.)
Expired - Lifetime
Application number
EP89906035A
Other languages
German (de)
French (fr)
Other versions
EP0440632A1 (en
Inventor
Otto Barthruff
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 EP0440632A1 publication Critical patent/EP0440632A1/en
Application granted granted Critical
Publication of EP0440632B1 publication Critical patent/EP0440632B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/043—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S475/00—Planetary gear transmission systems or components
    • Y10S475/901—Particular material
    • Y10S475/902—Nonmetallic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/13—Machine starters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/13—Machine starters
    • Y10T74/131—Automatic
    • Y10T74/137—Reduction gearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19633—Yieldability in gear trains

Definitions

  • the invention relates to a starting device for internal combustion engines of the type defined in the preamble of claim 1.
  • the so-called gear starters with an eccentrically arranged ring gear (DE-A-31 00 869), the sleeve, which is integral with the ring gear of a countershaft, has a steep thread on which a driver is arranged so as to be screwable.
  • the driver is connected to the starter pinion via a freewheel, which sits rotatably and displaceably on the gear shaft.
  • the driver is axially displaceable by an engagement relay, as a result of which the starter pinion can engage in the toothed ring of the internal combustion engine which protrudes into its displacement path. If the starter pinion is engaged, the drive motor is switched on. This turns the starter pinion via the additional gear, the driver and the freewheel.
  • a starting device for internal combustion engines with an electric drive motor in which the ring gear and the gear shaft of the countershaft via elastic Connecting elements are coupled to one another in order to dampen or partially absorb the shocks occurring there originating from the internal combustion engine.
  • this solution has the disadvantage that only the gear shaft with the drive pinion is mounted in the housing of the starter device, so that the ring gear, which is only connected to the drive shaft via the damping members, can deflect when shocks occur.
  • the accuracy and concentricity of the ring gear meshing with the pinion of the drive motor are impaired in the long-term behavior by the transmitted shocks, which can lead to increased wear on the countershaft or even failure of the turning device.
  • the aim is to achieve better storage and shock absorption on the countershaft of the starter device in order to avoid the deficiencies shown.
  • the starting device according to the invention with the characterizing features of claim 1 has the advantage that the peaks of the shock caused by the internal combustion engine are reduced by the elastic connecting element acting as a damping, so that the risk of breakage in the parts transmitting the torque of the drive motor is reduced.
  • the damping element itself represents part of the torque transmission line, the ring gear connected to it being mounted directly in the housing. Since, according to the invention, the connecting element is designed as a ring which lies in the ring gear and surrounds the gear shaft and which is positively connected in the direction of rotation on the one hand to the ring gear and on the other hand to the gear shaft, the elastic connection of the ring gear and gear shaft can be realized in a simple manner.
  • the gear starter shown in detail and in longitudinal section in FIG. 1 as an example of a starter device for internal combustion engines has an electric drive motor 10, a countershaft 11 and a starter pinion 12, which can be engaged by means of an engagement relay (not shown here) in a toothed ring 13 of the internal combustion engine indicated in sections .
  • the housing 14, the rotor 15 and the drive shaft 16 which is fixedly connected to the rotor 15 can be seen, which is mounted in a bearing 17 in the housing cover 18 and protrudes beyond the bearing 17 at the end.
  • the end section of the drive shaft 16 carries an external toothing 19 which meshes with an internal toothing 20 inside a ring gear 21 of the countershaft 11.
  • the ring gear 21 is seated on a gear shaft 24 of the countershaft 11 in a freely rotatable manner by means of a sleeve 23 which is integrally formed on a radial flange 22.
  • the ring gear 21 with the sleeve 23 and with the gear shaft 24 accommodated therein is arranged eccentrically to the drive shaft 16 and aligned parallel thereto, the ring gear 21 with the sleeve 23 via a bearing 25 on the housing cover 18 and the gear shaft 24 at the front in the bearing 26 in a gear housing 27 flanged to the housing cover 18 is mounted.
  • the starter pinion 12, which is rotatably and longitudinally movable on the gear shaft 24, is geared to a freewheel gear 28.
  • the freewheel gear 28 is connected in a rotationally fixed manner to the gear shaft 24 via a spur toothing 29 and can be moved longitudinally on the gear shaft 24 via a lever 30, which is actuated by the engagement relay, the starter pinion 12 engaging in the ring gear 13 of the internal combustion engine.
  • the gear shaft 24 projects with an end-side cone 31 into the interior of the ring gear 21, the radial flange 22 of the ring gear 21 abutting an annular shoulder 32 which is provided on the smaller diameter end face of the bonus 31.
  • the outer surface of the frustoconical cone 31 is covered with axial teeth 33.
  • the largest diameter of the cone 31 is significantly smaller than the inside diameter of the ring gear 21.
  • the axial length of the cone 31 is less than half the depth of the ring gear 21.
  • the axial length of the end section of the drive shaft 16, which with its external toothing 19 in the internal toothing 20 which extends over the entire depth of the ring gear 21 meshes, approximately only half as large as the depth of the ring gear 21, so that the drive shaft 16 ends at a short distance from the free end face of the cone 31 of the gear shaft 24.
  • an elastic damping ring 34 for example made of rubber, which couples the ring gear 21 to the gear shaft 24 in a rotationally fixed manner.
  • the damping ring 34 engages with an external toothing 35 in a positive manner in the internal toothing 20 of the ring gear 21.
  • the inner lateral surface of the damping ring 34 corresponds to the cone 31 frustoconical and has an internal toothing 36 which projects positively between the axial teeth 33 on the outer surface of the cone 31 of the gear shaft 24 (Fig. 2). Due to the bevel gear-like course of the interlocking teeth of cone 31 and damping ring 34, which rests with an end face on the radial flange 22 and is held by a locking ring 37, the damping ring 34 is secured against axial displacement, so that the rotationally fixed connection between the ring gear 21 and Gear shaft 24 is reliably maintained.
  • the damping ring 34 reduces the peaks of the shocks caused by the internal combustion engine to be rotated, so that a risk of breakage in the drive train 10 transmitting the torque from the drive motor 10 to the starting pinion 12 is largely avoided.
  • damping ring 34 can also be injected as an elastic plastic ring.

Abstract

In a starter for internal combustion engines with an electric starter motor (10) having a drive shaft (16), a starter pinion (12) engaging in a starter ring gear (13) of an internal combustion engine and with a transmission gear (11) forming the operative connection between the drive shaft (16) and the starter pinion (12), the risk of breakage in the drive train transmitting the torque of the starter motor (10) to the starter pinion (12) as a result of the compression and depression shocks arising from the internal combustion engine to be started is reduced by securing the starter pinion (12) directly or indirectly so as to turn with the gear shaft (24), which is connected via a flexible coupling (34) to an annular gear (21) with internal teeth (20) with which the outer teeth of the drive shaft (16) engage.

Description

Die Erfindung betrifft eine Andrehvorrichtung für Brennkraftmaschinen der im Oberbegriff des Anspruchs 1 definierten Gattung.The invention relates to a starting device for internal combustion engines of the type defined in the preamble of claim 1.

Bei einer bekannten Andrehvorrichtung, den sog. Getriebestartern mit exzentrisch angeordnetem Hohlradgetriebe, (DE-A-31 00 869) trägt die mit dem Hohlrad eines Vorgeleges einstückige Hülse ein Steilgewinde, auf dem ein Mitnehmer schraubbar angeordnet ist. Der Mitnehmer ist über einen Freilauf mit dem Andrehritzel verbunden, das dreh- und verschiebbar auf der Getriebewelle sitzt. Der Mitnehmer ist von einem Einrückrelais axial verschiebbar, wodurch das Andrehritzel in den in seinen Verschiebeweg hineinragenden Zahnkranz der Brennkraftmaschine einspuren kann. Ist das Andrehritzel eingespurt, so wird der Antriebsmotor eingeschaltet. Dieser dreht über das Vorgelege, den Mitnehmer und den Freilauf das Andrehritzel.In a known starting device, the so-called gear starters with an eccentrically arranged ring gear (DE-A-31 00 869), the sleeve, which is integral with the ring gear of a countershaft, has a steep thread on which a driver is arranged so as to be screwable. The driver is connected to the starter pinion via a freewheel, which sits rotatably and displaceably on the gear shaft. The driver is axially displaceable by an engagement relay, as a result of which the starter pinion can engage in the toothed ring of the internal combustion engine which protrudes into its displacement path. If the starter pinion is engaged, the drive motor is switched on. This turns the starter pinion via the additional gear, the driver and the freewheel.

Durch Kompressions- und Depressionsstöße der anzudrehenden Brennkraftmaschine kommt es dabei zu Stößen in dem das Drehmoment des Antriebsmotors übertragenden Getriebestrang, die zu Brüchen in diesem führen können. Diese Gefahr wird durch das Vorgelege verstärkt, weil durch die Übersetzung des Vorgeleges Stoßkräfte vergrößert werden.Compression and depression impacts of the internal combustion engine to be turned on result in impacts in the gear train transmitting the torque of the drive motor, which can lead to breaks in the latter. This danger is exacerbated by the reduction gear, because the transmission of the reduction gear increases shock forces.

Desweiteren ist aus der FR-A-2521641 eine Andrehvorrichtung für Brennkraftmaschinen mit einem elektrischen Antriebsmotor bekannt, bei der das Hohlrad und die Getriebewelle des Vorgeleges über elastische Verbindungselemente miteinander gekoppelt sind, um die dort auftretenden, von der Brennkraftmaschine ausgehenden Stöße zu dämpfen bzw. teilweise zu absorbieren. Diese Lösung hat jedoch den Nachteil, daß lediglich die Getriebewelle mit dem Antriebsritzel im Gehäuse der Andrehvorrichtung gelagert ist, so daß das lediglich über die Dämpfungsglieder mit der Antriebswelle verbundene Hohlrad beim Auftreten von Stößen ausweichen kann. Dadurch werden im Langzeitverhalten die Genauigkeit und der Rundlauf des mit dem Ritzel des Antriebsmotors kämmenden Hohlrades durch die übertragenen Stöße beeinträchtigt, was zu erhöhtem Verschleiß am Vorgelege bis hin zum Ausfall der Drehvorrichtung führen kann.Furthermore, from FR-A-2521641 a starting device for internal combustion engines with an electric drive motor is known, in which the ring gear and the gear shaft of the countershaft via elastic Connecting elements are coupled to one another in order to dampen or partially absorb the shocks occurring there originating from the internal combustion engine. However, this solution has the disadvantage that only the gear shaft with the drive pinion is mounted in the housing of the starter device, so that the ring gear, which is only connected to the drive shaft via the damping members, can deflect when shocks occur. As a result, the accuracy and concentricity of the ring gear meshing with the pinion of the drive motor are impaired in the long-term behavior by the transmitted shocks, which can lead to increased wear on the countershaft or even failure of the turning device.

Mit der vorliegenden Lösung wird angestrebt, zur Vermeidung der aufgezeigten Mängel mit einfachen Maßnahmen eine bessere Lagerung und Stoßdämpfung am Vorgelege der Andrehvorrichtung zu erzielen.With the present solution, the aim is to achieve better storage and shock absorption on the countershaft of the starter device in order to avoid the deficiencies shown.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Andrehvorrichtung mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß die Spitzen der von der anzudrehenden Brennkraftmaschine verursachten Stöße durch das als Dämpfung wirkende elastische Verbindungselement abgebaut werden, so daß die Bruchgefahr in den das Drehmoment des Antriebsmotors übertragenden Teilen verringert wird. Das Dämpfungselememt stellt dabei selbst einen Teil des Drehmomentübertragungsstrangs dar, wobei das damit verbundene Hohlrad unmittelbar im Gehäuse gelagert wird. Da erfindungsgemäß das Verbindungselement als ein im Hohlrad einliegender, die Getriebewelle umschließender Ring ausgebildet ist, der in Drehrichtung formschlüssig einerseits mit dem Hohlrad und andererseits mit der Getriebewelle verbunden ist, läßt sich die elastische Verbindung von Hohlrad und Getriebewelle in einfacher Weise realisieren.The starting device according to the invention with the characterizing features of claim 1 has the advantage that the peaks of the shock caused by the internal combustion engine are reduced by the elastic connecting element acting as a damping, so that the risk of breakage in the parts transmitting the torque of the drive motor is reduced. The damping element itself represents part of the torque transmission line, the ring gear connected to it being mounted directly in the housing. Since, according to the invention, the connecting element is designed as a ring which lies in the ring gear and surrounds the gear shaft and which is positively connected in the direction of rotation on the one hand to the ring gear and on the other hand to the gear shaft, the elastic connection of the ring gear and gear shaft can be realized in a simple manner.

Dabei ist keine Verlängerung der Andrehvorrichtung gegenüber einer Andrehvorrichtung ohne einem solchen Dämpfungselement erforderlich, weil durch die Stoßabsorption des elastischen Ringes die axiale Zahnlänge von Innen- und Außenverzahnung zwischen Hohlrad und Antriebswelle kleiner gemacht werden kann und dadurch Platz für die Ringbreite entsteht.In this case, no extension of the starting device compared to a starting device without such a damping element is necessary, because the shock absorption of the elastic ring makes the axial tooth length of the internal and external teeth between the ring gear and the drive shaft smaller, thereby creating space for the ring width.

Durch die in den weiteren Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Andrehvorrichtung möglich.Advantageous further developments and improvements of the starting device specified in claim 1 are possible through the measures listed in the further claims.

Zeichnungdrawing

Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

  • Fig. 1 ausschnittweise einen Längsschnitt eines Getriebestarters für ein Kraftfahrzeug,
  • Fig. 2 einen Schnitt längs der Linie II-II in Fig. 1.
The invention is explained in more detail in the following description with reference to an embodiment shown in the drawing. Show it:
  • 1 shows a detail of a longitudinal section of a transmission starter for a motor vehicle,
  • 2 shows a section along the line II-II in FIG. 1st

Beschreibung des AusführungsbeispielsDescription of the embodiment

Der in Fig. 1 ausschnittweise und im Längsschnitt dargestellte Getriebestarter als Beispiel einer Andrehvorrichtung für Brennkraftmaschinen weist einen elektrischen Antriebsmotor 10, ein Vorgelege 11 und ein Andrehritzel 12 auf, das mittels eines hier nicht dargestellten Einrückrelais in einen ausschnittweise angedeuteten Zahnkranz 13 der Brennkraftmaschine eingespurt werden kann. Von dem elektrischen Antriebsmotor 10 bekannten Aufbaus ist das Gehäuse 14, der Rotor 15 und die mit dem Rotor 15 fest verbundene Antriebswelle 16 zu sehen, die in einem Lager 17 im Gehäusedeckel 18 gelagert ist und endseitig über das Lager 17 vorsteht. Der Endabschnitt der Antriebswelle 16 trägt eine Außenverzahnung 19, die mit einer Innenverzahnung 20 im Innern eines Hohlrades 21 des Vorgeleges 11 kämmt. Das Hohlrad 21 sitzt mittels einer über einen Radialflansch 22 einstückig angeformten Hülse 23 frei drehbar auf einer Getriebewelle 24 des Vorgeleges 11.The gear starter shown in detail and in longitudinal section in FIG. 1 as an example of a starter device for internal combustion engines has an electric drive motor 10, a countershaft 11 and a starter pinion 12, which can be engaged by means of an engagement relay (not shown here) in a toothed ring 13 of the internal combustion engine indicated in sections . Of the construction known from the electric drive motor 10, the housing 14, the rotor 15 and the drive shaft 16 which is fixedly connected to the rotor 15 can be seen, which is mounted in a bearing 17 in the housing cover 18 and protrudes beyond the bearing 17 at the end. The end section of the drive shaft 16 carries an external toothing 19 which meshes with an internal toothing 20 inside a ring gear 21 of the countershaft 11. The ring gear 21 is seated on a gear shaft 24 of the countershaft 11 in a freely rotatable manner by means of a sleeve 23 which is integrally formed on a radial flange 22.

Das Hohlrad 21 mit der Hülse 23 und mit der darin aufgenommenen Getriebewelle 24 ist exzentrisch zur Antriebswelle 16 angeordnet und parallel zu dieser ausgerichtet, wobei das Hohlrad 21 mit der Hülse 23 über ein Lager 25 am Gehäusedeckel 18 und die Getriebewelle 24 vorn im Lager 26 in einem an dem Gehäusedeckel 18 angeflanschten Getriebegehäuse 27 gelagert ist. Das auf der Getriebewelle 24 dreh- und längsbeweglich sitzende Andrehritzel 12 ist mit einem Freilaufgetriebe 28 getrieblich gekoppelt. Das Freilaufgetriebe 28 ist über eine Geradverzahnung 29 auf der Getriebewelle 24 drehfest mit dieser verbunden und kann über einen Hebel 30, der von dem Einrückrelais betätigt wird, auf der Getriebewelle 24 längsverschoben werden, wobei das Andrehritzel 12 in den Zahnkranz 13 der Brennkraftmaschine einspurt.The ring gear 21 with the sleeve 23 and with the gear shaft 24 accommodated therein is arranged eccentrically to the drive shaft 16 and aligned parallel thereto, the ring gear 21 with the sleeve 23 via a bearing 25 on the housing cover 18 and the gear shaft 24 at the front in the bearing 26 in a gear housing 27 flanged to the housing cover 18 is mounted. The starter pinion 12, which is rotatably and longitudinally movable on the gear shaft 24, is geared to a freewheel gear 28. The freewheel gear 28 is connected in a rotationally fixed manner to the gear shaft 24 via a spur toothing 29 and can be moved longitudinally on the gear shaft 24 via a lever 30, which is actuated by the engagement relay, the starter pinion 12 engaging in the ring gear 13 of the internal combustion engine.

Die Getriebewelle 24 ragt mit einem endseitigen Konus 31 in das Innere des Hohlrades 21 hinein, wobei der Radialflansch 22 des Hohlrades 21 an einer Ringschulter 32 anliegt, die an der den kleineren Durchmesser aufweisenden Stirnseite des Bonus 31 vorgesehen ist. Die Mantelfläche des kegelstumpfförmigen konus 31 ist mit Axialzähnen 33 besetzt. Der größte Durchmesser des Konus 31 ist wesentlich kleiner als der lichte Innendurchmesser des Hohlrades 21. Die axiale Länge des Konus 31 beträgt weniger als die halbe Tiefe des Hohlrades 21. Zudem ist die axiale Länge des Endabschnittes der Antriebswelle 16, der mit seiner Außenverzahnung 19 in der über die gesamte Tiefe des Hohlrades 21 sich erstreckenden Innenverzahnung 20 kämmt, etwa nur halb so groß wie die Tiefe des Hohlrades 21, so daß die Antriebswelle 16 mit geringem Abstand vor der freien Stirnseite des Konus 31 der Getriebewelle 24 endet. In dem Zwischenraum zwischen dem Konus 31 und der Innenwand des Hohlrades 21 liegt ein elastischer Dämpfungsring 34, z.B. aus Gummi, ein, der das Hohlrad 21 mit der Getriebewelle 24 drehfest kuppelt. Dabei greift der Dämpfungsring 34 mit einer Außenverzahnung 35 in die Innenverzahnung 20 des Hohlrades 21 formschlüssig ein. Die innere Mantelfläche des Dämpfungsrings 34 ist entsprechend dem Konus 31 kegelstumpfförmig ausgebildet und trägt eine Innenverzahnung 36, die formschlüssig zwischen die Axialzähne 33 auf der Mantelfläche des Konus 31 der Getriebewelle 24 hineinragt (Fig. 2). Durch den kegelradähnlichen Verlauf der ineinandergreifenden Verzahnungen von Konus 31 und Dämpfungsring 34, der mit einer Stirnfläche an dem Radialflansch 22 anliegt und mittels eines Sicherungs ringes 37 gehalten wird, ist der Dämpfungsring 34 gegen axiales Verschieben gesichert, so daß die drehfeste Verbindung zwischen Hohlrad 21 und Getriebewelle 24 zuverlässig erhalten bleibt. Der Dämpfungsring 34 baut die Spitzen der von der anzudrehenden Brennkraftmaschine verursachten Stöße ab, so daß eine Bruchgefahr in dem das Drehmoment vom Antriebsmotor 10 auf das Andrehritzel 12 übertragenden Antriebsstrang weitgehend vermieden wird.The gear shaft 24 projects with an end-side cone 31 into the interior of the ring gear 21, the radial flange 22 of the ring gear 21 abutting an annular shoulder 32 which is provided on the smaller diameter end face of the bonus 31. The outer surface of the frustoconical cone 31 is covered with axial teeth 33. The largest diameter of the cone 31 is significantly smaller than the inside diameter of the ring gear 21. The axial length of the cone 31 is less than half the depth of the ring gear 21. In addition, the axial length of the end section of the drive shaft 16, which with its external toothing 19 in the internal toothing 20 which extends over the entire depth of the ring gear 21 meshes, approximately only half as large as the depth of the ring gear 21, so that the drive shaft 16 ends at a short distance from the free end face of the cone 31 of the gear shaft 24. In the space between the cone 31 and the inner wall of the ring gear 21 there is an elastic damping ring 34, for example made of rubber, which couples the ring gear 21 to the gear shaft 24 in a rotationally fixed manner. The damping ring 34 engages with an external toothing 35 in a positive manner in the internal toothing 20 of the ring gear 21. The inner lateral surface of the damping ring 34 corresponds to the cone 31 frustoconical and has an internal toothing 36 which projects positively between the axial teeth 33 on the outer surface of the cone 31 of the gear shaft 24 (Fig. 2). Due to the bevel gear-like course of the interlocking teeth of cone 31 and damping ring 34, which rests with an end face on the radial flange 22 and is held by a locking ring 37, the damping ring 34 is secured against axial displacement, so that the rotationally fixed connection between the ring gear 21 and Gear shaft 24 is reliably maintained. The damping ring 34 reduces the peaks of the shocks caused by the internal combustion engine to be rotated, so that a risk of breakage in the drive train 10 transmitting the torque from the drive motor 10 to the starting pinion 12 is largely avoided.

Anstelle des als Gummiring eingelegten Dämpfungsring 34 kann dieser auch als elastischer Kunststoffring eingespritzt werden.Instead of the damping ring 34 inserted as a rubber ring, it can also be injected as an elastic plastic ring.

Claims (6)

1. Starter for internal combustion engines having an electric drive motor (10) with a drive shaft (16), having a driver pinion (12) for engagement in a gear rim (13) of the internal combustion engine, and having a transmission gear (11), which produces the operative connection between the drive shaft and starter pinion and has a gear shaft (24), which is arranged eccentrically with respect to the drive shaft and on which the starter pinion is seated for engagement in a longitudinally movable fashion, and a ring gear (21), which rotates freely on the gear shaft by means of a bush (23) integrally formed in one piece and has internal teeth (20) in which the free end of the drive shaft, which is mounted on both sides in the housing of the starter, meshes with corresponding external teeth (19), the starter pinion (12) being connected indirectly or directly to the gear shaft (24) in a rotationally fixed fashion and the ring gear (21) and the gear shaft (24) being coupled to one another via a flexible coupling (34), characterised in that the ring gear (21) is likewise accommodated in a bearing (25) arranged in the housing of the starter, and in that the coupling is constructed as a ring (34), which is located in the ring gear (21), surrounds the gear shaft (24) and is connected in a positive fashion in the circumferential direction to the ring gear (21), on the one hand, and to the gear shaft (24), on the other hand.
2. Starter according to Claim 1, characterised in that the ring (34) carries external teeth (35), which are formed in accordance with the internal teeth (20) of the ring gear (21) and engage in said internal teeth.
3. Starter according to Claim 1 or 2, characterised in that the gear shaft (24) and the ring (34) interlock via corresponding external and internal teeth (33, 36).
4. Starter according to Claim 3, characterised in that the ring gear (21) and the bush (23) are connected to one another in one piece via a radial flange (22), in that the ring (34) bears on the radial flange (22), and in that in each case the external teeth (33) of the gear shaft (24) and the internal teeth (36) of the ring (36) [sic] are applied to mutually parallel lateral conical surfaces which rise up to the end of the gear shaft (24).
5. Starter according to one of Claims 1 to 4, characterised in that the ring (34) is inserted into the ring gear (21) as a rubber ring.
6. Starter according to one of Claims 1 to 4, characterised in that the ring (34) made of plastic is injected into the ring gear (21).
EP89906035A 1988-06-22 1989-05-30 A starter for internal combustion engines Expired - Lifetime EP0440632B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3821023 1988-06-22
DE3821023A DE3821023A1 (en) 1988-06-22 1988-06-22 TURNING DEVICE FOR INTERNAL COMBUSTION ENGINES

Publications (2)

Publication Number Publication Date
EP0440632A1 EP0440632A1 (en) 1991-08-14
EP0440632B1 true EP0440632B1 (en) 1992-05-06

Family

ID=6356983

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89906035A Expired - Lifetime EP0440632B1 (en) 1988-06-22 1989-05-30 A starter for internal combustion engines

Country Status (7)

Country Link
US (1) US5127279A (en)
EP (1) EP0440632B1 (en)
JP (1) JPH03505359A (en)
BR (1) BR8907513A (en)
DE (2) DE3821023A1 (en)
ES (1) ES2013938A6 (en)
WO (1) WO1989012742A1 (en)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8923765D0 (en) * 1989-10-21 1989-12-06 Magneti Marelli Electrical Torque limiting device
DE4302854C1 (en) * 1993-02-02 1994-06-09 Bosch Gmbh Robert Starting device for IC engine - has starter motor and free run coupling with spring accumulator for damping thrust-form torque variations
US5653144A (en) 1993-02-09 1997-08-05 Fenelon; Paul J. Stress dissipation apparatus
US5452622A (en) * 1993-02-09 1995-09-26 Magi, L.P. Stress dissipation gear
US5307705A (en) * 1993-02-09 1994-05-03 Fenelon Paul J Stress dissipation gear and method of making same
JPH0712034A (en) * 1993-06-23 1995-01-17 Mitsuba Electric Mfg Co Ltd Starter
FR2744767B1 (en) * 1996-02-09 1998-03-06 Valeo Equip Electr Moteur STARTER OF A MOTOR VEHICLE PROVIDED WITH A STARTER PINION AND METHOD OF MOUNTING SUCH A STARTER
US5956998A (en) 1996-06-06 1999-09-28 Fenelon; Paul J. Stress reduction gear and apparatus using same
FR2751803B1 (en) * 1996-07-26 2003-06-13 Valeo Equip Electr Moteur STARTER OF A MOTOR VEHICLE WITH REDUCER COMPRISING A DAMPING DEVICE
US6089112A (en) * 1998-02-06 2000-07-18 Case Corporation Method and apparatus for starting an engine
JP3789641B2 (en) * 1998-05-27 2006-06-28 三菱電機株式会社 Throttle valve control device for internal combustion engine
DE19832933B4 (en) * 1998-07-22 2007-10-18 Khd Humboldt Wedag Gmbh Drive sprocket for a sprocket / pinion drive
JP3727483B2 (en) * 1999-03-30 2005-12-14 三菱電機株式会社 Throttle valve control device for internal combustion engine
DE10003452A1 (en) * 2000-01-27 2001-08-09 Sig Positec Bergerlahr Gmbh & Electric motor with epicyclic gear
JP2004084551A (en) * 2002-08-27 2004-03-18 Yamaha Motor Co Ltd Drive unit for riding vehicle
US20050016001A1 (en) 2003-06-24 2005-01-27 Milwaukee Electric Tool Corporation Drive mechanism and power tool
US7360464B2 (en) * 2003-12-15 2008-04-22 Automotive Components Holdings, Llc Variable rate impact and oscillation absorber in starter motors
DE102006011644A1 (en) * 2006-03-06 2007-09-13 Robert Bosch Gmbh Device having a first gear part for meshing in a second gear part, in particular starting device with a pinion for meshing in a ring gear of an internal combustion engine and method for operating such a device
US7373908B2 (en) * 2006-08-29 2008-05-20 Gm Global Technology Operations, Inc. Reduced noise engine start-stop system using traditional crank device
US20080184845A1 (en) * 2007-02-01 2008-08-07 Farrar Peter K Planetary starter apparatus and assembly method thereof
US8215212B2 (en) * 2008-06-05 2012-07-10 Pro-Cut Licensing Company, Llc On-vehicle brake lathe with indirect drive
US20090320644A1 (en) * 2008-06-30 2009-12-31 Remy International, Inc. Torque Limiter for Engine Starter
US8826547B2 (en) * 2008-11-25 2014-09-09 Robert Bosch Gmbh Impact absorption drive mechanism for a reciprocating tool
US8661924B2 (en) 2010-04-13 2014-03-04 Ford Global Technologies Starter with rock back and oscillation abosrbers
JP5811496B2 (en) * 2011-09-15 2015-11-11 日立工機株式会社 Reciprocating tool
HUE048074T2 (en) * 2012-06-21 2020-05-28 Seg Automotive Germany Gmbh Starting device for starting combustion engines
DE102020131974B3 (en) 2020-12-02 2022-03-10 Vibracoustic Se Assembly with decoupling ring for a planetary gear and planetary gear with decoupling ring

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2306539A (en) * 1940-04-19 1942-12-29 Bendix Aviat Corp Engine starter drive
US2591734A (en) * 1949-01-03 1952-04-08 Gen Electric Planetary gear construction
US2857777A (en) * 1955-02-07 1958-10-28 Gen Motors Corp Gear assembly
US3362256A (en) * 1966-03-01 1968-01-09 Garrett Corp Combination accessory drive and engine starting mechanism
DE1750089A1 (en) * 1968-03-28 1971-01-14 Olympia Werke Ag Gear with internal teeth
JPS5615404Y2 (en) * 1975-12-03 1981-04-10
FR2498392A1 (en) * 1981-01-21 1982-07-23 Paris & Du Rhone IMPROVEMENTS TO ELECTRIC STARTERS FOR INTERNAL COMBUSTION ENGINES COMPRISING A REDUCER INSERTED BETWEEN ITS ELECTRIC MOTOR AND ITS LAUNCHER
FR2521641A3 (en) * 1982-02-17 1983-08-19 Ducellier & Cie IC engine starter motor with output reduction gearing - uses flexible coupling formed between radial teeth projecting out from pinion hub and inward from input wheel
US4680979A (en) * 1984-12-20 1987-07-21 Mitsubishi Denki Kabushiki Kaisha Planetary gear starter
JPH01152068U (en) * 1988-04-13 1989-10-19

Also Published As

Publication number Publication date
DE3821023A1 (en) 1989-12-28
US5127279A (en) 1992-07-07
JPH03505359A (en) 1991-11-21
ES2013938A6 (en) 1990-06-01
BR8907513A (en) 1991-06-11
DE58901354D1 (en) 1992-06-11
EP0440632A1 (en) 1991-08-14
WO1989012742A1 (en) 1989-12-28

Similar Documents

Publication Publication Date Title
EP0440632B1 (en) A starter for internal combustion engines
DE3225957A1 (en) TURNING DEVICE FOR INTERNAL COMBUSTION ENGINES
EP3094886B1 (en) Differential gear
WO2017206988A1 (en) Actuating gear mechanism
EP2730807B1 (en) Planetary gear with multiple gear stages
WO2002009998A1 (en) Actuator for an automotive steering system
EP0012250A1 (en) Drive mechanism for displacing window panes, sliding roofs and the like of motor vehicles
EP3527845A1 (en) Bearing arrangement in a crossed-axes planet transmission
DE4030813C2 (en) Coaxial type starter for internal combustion engines
DE102009000760A1 (en) Transmission drive unit, in particular for a sunroof drive
DE10005001A1 (en) Drive system for IC engine comprises drive shaft fitted with twin mass flywheel, both primary and secondary masses being disk-shaped and having outside gearing which cooperates with pinions on starter motor
EP0069125B1 (en) Starter for combustion engine
WO2000031383A1 (en) Spur wheel camshaft drive for an internal combustion engine
DE19910922A1 (en) Eccentric gear transmission
DE3626642C1 (en) Lift-controlled windscreen wiper system for motor vehicles
DE3042436A1 (en) Automotive IC engine starter system - has engagement pinion driving layshaft drive accommodated in motor drive housing
DE2904495A1 (en) TURNING DEVICE FOR INTERNAL COMBUSTION ENGINES
DE2550501C3 (en) Distributor ignition drive for internal combustion engines
DE3438257C1 (en) Lockable bevel-gear differential for a motor vehicle
DE102012202926A1 (en) Gearbox for single wheel thruster of industrial truck, has countershaft that is connected to wheel shaft through gear stage, and gear that is provided with internal tooth for meshing drive shaft with pinion
DE19538865A1 (en) Transmission gear with electric drive motor e.g. for automotive vehicle
DE19714648A1 (en) Fuel feed pump for IC engine
DE102004015332A1 (en) Powered live axle
WO2011032759A1 (en) Geared drive unit
DE102022110702A1 (en) Splined shaft-hub connection of a gearbox for an electromechanical axle drive train

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19901126

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT SE

17Q First examination report despatched

Effective date: 19911010

RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ROBERT BOSCH GMBH

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

REF Corresponds to:

Ref document number: 58901354

Country of ref document: DE

Date of ref document: 19920611

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940523

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19940525

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940530

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940727

Year of fee payment: 6

EAL Se: european patent in force in sweden

Ref document number: 89906035.4

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950530

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19950531

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950530

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960201

EUG Se: european patent has lapsed

Ref document number: 89906035.4

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960229

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050530