EP0518877B1 - Compact starter device - Google Patents

Compact starter device Download PDF

Info

Publication number
EP0518877B1
EP0518877B1 EP91903881A EP91903881A EP0518877B1 EP 0518877 B1 EP0518877 B1 EP 0518877B1 EP 91903881 A EP91903881 A EP 91903881A EP 91903881 A EP91903881 A EP 91903881A EP 0518877 B1 EP0518877 B1 EP 0518877B1
Authority
EP
European Patent Office
Prior art keywords
bearing
starting device
rotor
free
housing
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
EP91903881A
Other languages
German (de)
French (fr)
Other versions
EP0518877A1 (en
Inventor
Werner Rometsch
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 EP0518877A1 publication Critical patent/EP0518877A1/en
Application granted granted Critical
Publication of EP0518877B1 publication Critical patent/EP0518877B1/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
    • F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
    • F02N15/023—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the overrunning type
    • 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
    • F02N15/046—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer of the planetary type
    • 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
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • 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
    • 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

Definitions

  • the invention relates to a starting device, in particular a freely ejecting starting device, with an electric motor, the rotor of which drives an output shaft having a pinion for driving a ring gear of an internal combustion engine via a freewheeling gear, the end region of the output shaft carrying the pinion being mounted in an end wall of the housing ( DE-OS 39 08 870).
  • a pinion of the starter device engages in a ring gear of the internal combustion engine.
  • an output shaft carrying this is axially displaceably mounted.
  • the pinion spurts out of the ring gear again, the output shaft resetting into its starting position.
  • the axial movement the output shaft is preferably carried out, inter alia, by a steep thread.
  • a freewheel device is provided which causes torque transmission in one direction of rotation and decoupling in the other direction of rotation, so that after the internal combustion engine has started, the starter device can be "overhauled", which causes the pinion to be disengaged.
  • the starting device with the features mentioned in the main claim has the advantage that a short and light design can be achieved.
  • the output shaft is mounted via a first bearing in a central opening of an outer ring of the freewheel device.
  • the outer surface of the freewheel outer ring is supported by a second bearing on the housing of the starter.
  • the associated end of a rotor shaft of the starter rotor is mounted on the end region of the output shaft located in the interior of the housing via a third bearing.
  • This construction according to the invention thus leads to the output shaft being mounted in a stationary manner via the freewheel outer ring in the interior of the housing, an end region of the output shaft simultaneously being a bearing point for the forms correspondingly facing end of the starter rotor.
  • This configuration enables a compact and simple structure, since the number of bearing points supported directly on the housing of the starter device is reduced.
  • the first bearing is designed as a radial bearing, in particular as a roller bearing. It can preferably be a needle bearing.
  • the second bearing absorbs radial forces on the one hand, but also axial forces on the other, that is to say it is designed as an axial bearing, as a result of which the freewheel outer ring is axially fixed.
  • it can be designed as a roller bearing, preferably as a ball bearing, in particular as a deep groove ball bearing.
  • the third bearing is in turn a radial bearing, which is in particular a roller bearing.
  • the rolling bearing can also be designed as a needle bearing here.
  • the rotor shaft has an axial receiving bore in which the third bearing is arranged and into which the output shaft protrudes with its end.
  • the rotor shaft and output shaft therefore run coaxially with one another, with the engagement of the output shaft in the receiving bore of the rotor shaft resulting in a “nesting” which contributes to the small overall length of the starting device according to the invention.
  • the other end region of the rotor shaft is in a first opening in a rear end wall of the housing arranged fourth bearing, in particular needle bearings.
  • the rotor shaft is thus supported in its end regions.
  • a fifth bearing is provided, which is designed in particular as a cylindrical roller bearing. This is arranged in a second opening in the front end wall of the housing, which is diametrically opposite the first opening.
  • the fifth bearing guides the end region of the output shaft emerging from the housing, on which the already mentioned pinion is arranged.
  • the freewheel outer ring is designed as a stepped bearing sleeve with two circular cross-sections of different sizes. Rolling elements of the freewheel device act on the inner surface of the larger-diameter section of the bearing sleeve.
  • the second bearing is arranged on the lateral surface of the smaller diameter section of the bearing sleeve.
  • the central opening of the freewheel outer ring is delimited by the inner wall of the smaller-diameter section of the bearing sleeve. This results in an arrangement of the first bearing received in this central opening at approximately the same height as the second bearing. Radial forces are thus derived directly, that is, over a short distance into the housing of the starter. This training also contributes to a short and smooth construction.
  • the freewheel outer ring is connected to a planet carrier, on which preferably several planet gears are mounted, which mesh with a ring gear fixed to the housing and with a sun gear driven by the starter rotor.
  • a planet carrier on which preferably several planet gears are mounted, which mesh with a ring gear fixed to the housing and with a sun gear driven by the starter rotor.
  • This configuration allows the transmission between the DC motor having the starter rotor and the output shaft to be realized in a very small space.
  • the sun gear can be formed on the lateral surface of the rotor shaft.
  • an inner ring cooperating with the rolling elements of the freewheel device is provided, which engages with thread protrusions in a steep thread of the output shaft.
  • the figure shows a longitudinal section through a starter device 1.
  • This has a housing 2, in which a direct current motor 3 and an engagement relay 4 are accommodated.
  • the DC motor 3 has a rotor 5 which acts on an output shaft 6, on the end 7 of which a pinion 8 is arranged in a rotationally fixed manner.
  • the internal combustion engine advances the pinion 8 into the position 9 shown in dashed lines in the figure and in the process engages in a ring gear 10 of the internal combustion engine.
  • the engagement of relay 4 causes the pinion to move axially to position 9. This will be discussed in more detail below.
  • the rotor 5 is provided with a commutator 11, to the segments 12 of which a rotor winding 13 is connected.
  • the commutator 11 interacts with a carbon brush arrangement 14.
  • a stator 15 with a stator winding 16 is provided, which lies opposite the rotor 5 with a small air gap.
  • the rotor 5 has a rotor shaft 17 which is supported at one end 18 in a needle bearing 19 and covered by a housing cap 20.
  • the other end of the rotor shaft 17 has a central receiving bore 22 extending from its end face 21, into which the one end 23 of the output shaft 6 engages.
  • This other end of the rotor shaft 17 is mounted on the end 23 of the output shaft 6 via a needle bearing 31, which is arranged in the receiving bore 22.
  • the lateral surface 24 of the end 25 of the rotor shaft 17 provided with the receiving bore 22 is designed as a sun gear 26 which meshes with planet gears 27 which are arranged on a planet carrier 28 (only one planet gear 27 is shown in the figure).
  • the planet gears 27 are arranged with the interposition of needle bearings on bearing pins 29.
  • the planet gears 27 mesh with a ring gear 30 provided with internal teeth, which is arranged in a stationary manner in the housing 2.
  • the end 23 of the output shaft 6 is mounted in the receiving bore of the axial web 39 via a needle bearing 37.
  • the freewheel outer ring 35 is held by a deep groove ball bearing 38, which is arranged on the axial web 39 and on the other hand is supported in the housing 2 (fixed bearing).
  • a cylindrical roller bearing 33 is provided — held by the housing 2, to which a sealing ring 34 is connected upstream — to the outside.
  • the cylindrical roller bearing 33 guides the output shaft 6 both in the axial and in the radial direction.
  • the planet carrier 28 is axially connected to a freewheel outer ring 35 via screws 36.
  • the freewheel outer ring 35 belongs to a freewheel device 40 which is designed as a roller freewheel. It has spring-loaded rollers 41 which interact with an inner ring 42 of the freewheel device 40.
  • the inner ring 42 is connected to the output shaft 6 via a steep thread 43.
  • the output shaft 6 has a groove 44 in which a snap ring 45 is arranged.
  • the snap ring 45 forms a stop which, in the event of an axial displacement of the output shaft 6 to be described in greater detail, cooperates with a step 46 of the inner ring 42.
  • the freewheel outer ring 35 is thus a bearing sleeve 160 with two differently sized, circular
  • Rolling bodies 163 of the freewheel device 40 formed by the rollers 41 act on the inner surface 161 of the larger-diameter section 162 of the bearing sleeve 160.
  • the deep groove ball bearing 38 is arranged on the lateral surface 164 of the smaller diameter section 165 of the bearing sleeve 160. This is directly opposite the needle bearing 37, which is arranged in a central opening 166 of the freewheel outer ring 35.
  • a retaining ring 47 which has a radial collar 48, is fastened on the output shaft 6. Furthermore, a snap ring 50, which supports a disk 51, lies in a groove 49 of the retaining ring 47. An annular channel 52 is thus formed between the disk 51 and the radial collar 48.
  • the pinion 8 is rotatably but axially displaceably mounted. It is acted upon by a helical compression spring 54. This is preloaded when a tooth-on-tooth position results when the pinion 8 is engaged in the ring gear 10.
  • the engagement relay 4 has a fixed relay winding 61 which interacts with an armature 62.
  • the armature 62 is axially displaceably mounted on an axis 63 and is urged into the position shown in the figure by a return spring 64 in the form of a helical compression spring when the engagement relay 4 is not energized.
  • the axis 63 has at its one end region 65 a contact element 66 that can interact with electrical connections 67.
  • the armature 62 is connected to a plunger 68 which projects into a housing space 69 of the housing 2.
  • the plunger 68 interacts with an engagement lever 70 designed as a double lever, which is pivotably mounted approximately in its central region by means of a cross bolt 71.
  • the cross pin 71 is held on a housing-side arm 72.
  • the lower end 73 of the engagement lever 70 is provided with a projection 74 which engages in the annular channel 52.
  • a driving head 76 is formed at the other end 75 of the engagement lever 70.
  • a locking device 77 which is essentially formed by a bow spring 80, a control sleeve 108, a ring 117 and springs 99 and 112, prevents the pinion 8 from inadvertently moving in the direction of the ring gear 10 of the internal combustion engine, since this would damage the Parts could result.
  • This unintentional axial movement could occur without a locking device 77 in that braking moments, e.g. occur through the bearings and a shaft sealing ring, move the output shaft 6 in the single-track position, that is, the return spring forces are smaller than the axial force components occurring on the high-helix thread.
  • the steep thread 43 allows an axial displacement of the output shaft 6 by the dimension a.
  • the rotor shaft 17 is guided in a rotor bearing 147, which is designed as a needle bearing 19.
  • the starting device 1 operates as follows: For a starting process of the internal combustion engine (not shown), the engagement relay 4 is energized via a start switch. This leads to the armature 62 moving to the right (FIG.), As a result of which the control sleeve 108 runs against the bow spring 80 in such a way that the latter is expanded radially. As a result, the ring 117 is released. A relative movement between the control sleeve 108 and the ring 117 is possible while consuming the free travel b because the latter is mounted on the control sleeve 108 so as to be axially displaceable.
  • the free travel b is used up, that is to say the left side of the driving head 76 is carried along by the control sleeve 108.
  • the engagement lever 70 pivots clockwise around the cross pin 71.
  • the projection 74 shifts the output shaft 6 in the direction of the ring gear 10, as a result of which the pinion 8 can engage in the toothing of the ring gear 10.
  • the engagement forces ensure that the pinion 8 is now complete retracts into the ring gear 10, the output shaft 6 axially extending to the end position due to the steep thread 43, so that — as a result — the position 9 shown in broken lines in the figure is taken up by the pinion 8.
  • the engagement relay 4 drops out.
  • the return movement is supported by the return springs 64 and 112.
  • the ring 117 comes against the driving head 76 of the engagement lever 70, so that the engagement lever 70 pivots counterclockwise, whereby the pinion 8 is returned to the position shown in the figure with a solid line. Since the internal combustion engine, which is now in operation, "overtakes" the rotation of the pinion 8 in the final stage of the starting process, the disengagement process is supported by the steep thread 43.
  • the end region 32 of the output shaft 6 is supported in the cylindrical roller bearing 33.
  • the other end 23 of the output shaft 6 is mounted on the housing 2 of the starter device 1 via the needle bearing 37 and the freewheel outer ring 35 and the deep groove ball bearing 38.
  • the rotor shaft 17 is supported in the region of the commutator 11 by the needle bearing 19. Its end 25 engages around the end 23 of the output shaft and is supported thereon by means of the needle bearing 31.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Rolling Contact Bearings (AREA)
  • Retarders (AREA)

Abstract

A starter device, in particular a freely disengaging starter device, has an electric motor the rotor of which drives a drive shaft with a pinion for driving a crown gear of an internal combustion engine through a free-wheeling reduction gearing. The pinion-carrying end region of the drive shaft is mounted in a front wall of the housing. To obtain a compact, in particular short, structure, the other end (23) of the drive shaft (6) is mounted on a first bearing (needle bearing (37)) in a central opening (166) of a free-wheeling outer ring (35) the outer surface (164) of which abuts on the housing (2) of the starter device through a second bearing (deep groove ball bearing (38)), and the associated end (25) of a rotor shaft (17) of the starter rotor (5) is mounted on a third bearing (needle bearing (31)) at the end region of the drive shaft (6) located inside the housing (2).

Description

Stand der TechnikState of the art

Die Erfindung betrifft eine Andrehvorrichtung, insbesondere frei ausstoßende Andrehvorrichtung, mit einem Elektromotor, dessen Rotor über ein Freilaufvorgelege eine ein Ritzel für den Antrieb eines Zahnkranzes einer Brennkraftmaschine aufweisende Abtriebswelle antreibt, wobei der das Ritzel tragende Endbereich der Abtriebswelle in einer Stirnwand des Gehäuses gelagert ist (DE-OS 39 08 870).The invention relates to a starting device, in particular a freely ejecting starting device, with an electric motor, the rotor of which drives an output shaft having a pinion for driving a ring gear of an internal combustion engine via a freewheeling gear, the end region of the output shaft carrying the pinion being mounted in an end wall of the housing ( DE-OS 39 08 870).

In der Kraftfahrzeugtechnik dienen derartige Andrehvorrichtungen zum Start der Fahrzeug-Brennkraftmaschinen. Für den Startvorgang spurt ein Ritzel der Andrehvorrichtung in einen Zahnkranz der Brennkraftmaschine ein. Für die hierzu erforderliche Axialbewegung des Ritzels ist eine dieses tragende Abtriebswelle axial verschieblich gelagert. Wird der Startvorgang beendet, so spurt das Ritzel wieder aus dem Zahnkranz aus, wobei die Abtriebswelle in ihre Ausgangslage zurücktritt. Die Axialbewegung der Abtriebswelle erfolgt u.a. vorzugsweise durch ein Steilgewinde. Ferner ist eine Freilaufeinrichtung vorgesehen, die in der einen Drehrichtung eine Drehmomentübertragung und in der anderen Drehrichtung eine Entkopplung bewirkt, so daß nach dem Anspringen der Brennkraftmaschine ein "Überholen" der Andrehvorrichtung möglich ist, wodurch es zum Ausspuren des Ritzels kommt.In automotive engineering, such starting devices are used to start the vehicle internal combustion engines. For the starting process, a pinion of the starter device engages in a ring gear of the internal combustion engine. For the axial movement of the pinion required for this purpose, an output shaft carrying this is axially displaceably mounted. When the starting process is ended, the pinion spurts out of the ring gear again, the output shaft resetting into its starting position. The axial movement the output shaft is preferably carried out, inter alia, by a steep thread. Furthermore, a freewheel device is provided which causes torque transmission in one direction of rotation and decoupling in the other direction of rotation, so that after the internal combustion engine has started, the starter device can be "overhauled", which causes the pinion to be disengaged.

Durch die Vorrichtung zur Axialverlagerung der Abtriebswelle und auch aufgrund der Freilaufeinrichtung und die erforderlichen Lagerstellen ergibt sich eine relativ große Baulänge derartiger Andrehvorrichtungen, die sich noch vergrößert, wenn sie als Getriebestarter ausgebildet sind.The device for axially displacing the output shaft and also because of the freewheel device and the required bearing points result in a relatively large overall length of such starting devices, which is further increased if they are designed as gear starters.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Andrehvorrichtung mit den im Hauptanspruch genannten Merkmalen hat demgegenüber den Vorteil, daß eine kurze und auch leichte Bauform erzielbar ist. Die Abtriebswelle ist über ein erstes Lager in einer zentralen Öffnung eines Freilaufaußenrings der Freilaufeinrichtung gelagert. Die Mantelfläche des Freilaufaußenrings stützt sich über ein zweites Lager am Gehäuse der Andrehvorrichtung ab. Am im Inneren des Gehäuses liegenden Endbereich der Abtriebswelle ist über ein drittes Lager das zugehörige Ende einer Rotorwelle des Starterrotors gelagert. Diese erfindungsgemäße Konstruktion führt somit dazu, daß die Abtriebswelle über den Freilaufaußenring im Inneren des Gehäuses ortsfest gelagert ist, wobei ein Endbereich der Abtriebswelle gleichzeitig eine Lagerstelle für das entsprechend zugewandte Ende des Starterrotors bildet. Diese Ausgestaltung ermöglicht einen kompakten und einfachen Aufbau, da die Zahl der sich direkt am Gehäuse der Andrehvorrichtung abstützenden Lagerstellen reduziert ist.The starting device according to the invention with the features mentioned in the main claim has the advantage that a short and light design can be achieved. The output shaft is mounted via a first bearing in a central opening of an outer ring of the freewheel device. The outer surface of the freewheel outer ring is supported by a second bearing on the housing of the starter. The associated end of a rotor shaft of the starter rotor is mounted on the end region of the output shaft located in the interior of the housing via a third bearing. This construction according to the invention thus leads to the output shaft being mounted in a stationary manner via the freewheel outer ring in the interior of the housing, an end region of the output shaft simultaneously being a bearing point for the forms correspondingly facing end of the starter rotor. This configuration enables a compact and simple structure, since the number of bearing points supported directly on the housing of the starter device is reduced.

Nach einem bevorzugten Ausführungsbeispiel ist das erste Lager als Radiallager, insbesondere als Wälzlager ausgebildet. Vorzugsweise kann es ein Nadellager sein.According to a preferred embodiment, the first bearing is designed as a radial bearing, in particular as a roller bearing. It can preferably be a needle bearing.

Das zweite Lager nimmt -wie das erwähnte Radiallager- einerseits Radialkräfte, andererseits jedoch auch Axialkräfte auf, das heißt, es ist als Axiallager ausgebildet, wodurch eine axiale Fixierung des Freilaufaußenrings erfolgt. Insbesondere kann es als Wälzlager, vorzugsweise als Kugellager, insbesondere als Rillenkugellager ausgebildet sein.Like the radial bearing mentioned, the second bearing absorbs radial forces on the one hand, but also axial forces on the other, that is to say it is designed as an axial bearing, as a result of which the freewheel outer ring is axially fixed. In particular, it can be designed as a roller bearing, preferably as a ball bearing, in particular as a deep groove ball bearing.

Das dritte Lager ist wiederum ein Radiallager, das insbesondere ein Wälzlager ist. Auch hier kann das Wälzlager als Nadellager ausgebildet sein.The third bearing is in turn a radial bearing, which is in particular a roller bearing. The rolling bearing can also be designed as a needle bearing here.

Nach einem bevorzugten Ausführungsbeispiel weist die Rotorwelle eine axiale Aufnahmebohrung auf, in der das dritte Lager angeordnet ist und in die die Abtriebswelle mit ihrem Ende hineinragt. Rotorwelle und Abtriebswelle laufen daher koaxial zueinander, wobei sich durch das Eingreifen der Abtriebswelle in die Aufnahmebohrung der Rotorwelle eine "Verschachtelung" ergibt, die zur geringen Baulänge der erfindungsgemäßen Andrehvorrichtung beiträgt.According to a preferred embodiment, the rotor shaft has an axial receiving bore in which the third bearing is arranged and into which the output shaft protrudes with its end. The rotor shaft and output shaft therefore run coaxially with one another, with the engagement of the output shaft in the receiving bore of the rotor shaft resulting in a “nesting” which contributes to the small overall length of the starting device according to the invention.

Vorteilhaft ist es, wenn der andere Endbereich der Rotorwelle in einem in einem ersten Durchbruch in einer hinteren Stirnwand des Gehäuses angeordneten vierten Lager, insbesondere Nadellager, lagert. Damit ist die Rotorwelle jeweils in ihren Endbereichen gelagert.It is advantageous if the other end region of the rotor shaft is in a first opening in a rear end wall of the housing arranged fourth bearing, in particular needle bearings. The rotor shaft is thus supported in its end regions.

Es ist ein fünftes Lager vorgesehen, das insbesondere als Zylinderrollenlager ausgebildet ist. Dieses ist in einem zweiten Durchbruch in der vorderen Stirnwand des Gehäuses angeordnet, der dem ersten Durchbruch diametral gegenüberliegt. Das fünfte Lager führt den aus dem Gehäuse austretenden Endbereich der Abtriebswelle, an dem das bereits erwähnte Ritzel angeordnet ist.A fifth bearing is provided, which is designed in particular as a cylindrical roller bearing. This is arranged in a second opening in the front end wall of the housing, which is diametrically opposite the first opening. The fifth bearing guides the end region of the output shaft emerging from the housing, on which the already mentioned pinion is arranged.

Nach einem speziellen Ausführungsbeispiel ist der Freilaufaußenring als stufenförmige Lagerhülse mit zwei unterschiedlich großen, kreisförmigen Querschnitten ausgebildet. An der Innenfläche des durchmessergrößeren Abschnitts der Lagerhülse greifen Wälzkörper der Freilaufeinrichtung an. An der Mantelfläche des durchmesserkleineren Abschnitts der Lagerhülse ist das zweite Lager angeordnet.According to a special embodiment, the freewheel outer ring is designed as a stepped bearing sleeve with two circular cross-sections of different sizes. Rolling elements of the freewheel device act on the inner surface of the larger-diameter section of the bearing sleeve. The second bearing is arranged on the lateral surface of the smaller diameter section of the bearing sleeve.

Die zentrale Öffnung des Freilaufaußenrings wird von der Innenwandung des durchmesserkleineren Abschnitts der Lagerhülse begrenzt. Hierdurch ergibt sich eine Anordnung des in dieser zentralen Öffnung aufgenommenen ersten Lagers etwa auf gleicher Höhe zum zweiten Lager. Radialkräfte werden somit direkt, das heißt, auf kurzem Wege in das Gehäuse der Andrehvorrichtung abgeleitet. Diese Ausbildung trägt ebenfalls zu einer kurzen und laufruhigen Bauform bei.The central opening of the freewheel outer ring is delimited by the inner wall of the smaller-diameter section of the bearing sleeve. This results in an arrangement of the first bearing received in this central opening at approximately the same height as the second bearing. Radial forces are thus derived directly, that is, over a short distance into the housing of the starter. This training also contributes to a short and smooth construction.

Bei der Ausbildung der Andrehvorrichtung als Getriebestarter ist der Freilaufaußenring mit einem Planetenträger verbunden, an dem vorzugsweise mehrere Planetenräder lagern, die mit einem gehäusefesten Hohlrad und mit einem vom Starterrotor angetriebenen Sonnenrad kämmen. Auf engstem Raum läßt sich durch diese Ausgestaltung das Getriebe zwischen dem den Starterrotor aufweisenden Gleichstrommotor und der Abtriebswelle realisieren. Insbesondere kann das Sonnenrad an der Mantelfläche der Rotorwelle ausgebildet sein.When the starter device is designed as a gear starter, the freewheel outer ring is connected to a planet carrier, on which preferably several planet gears are mounted, which mesh with a ring gear fixed to the housing and with a sun gear driven by the starter rotor. This configuration allows the transmission between the DC motor having the starter rotor and the output shaft to be realized in a very small space. In particular, the sun gear can be formed on the lateral surface of the rotor shaft.

Für die Axialverlagerung der Abtriebswelle ist ein mit den Wälzkörpern der Freilaufeinrichtung zusammenwirkender Innenring vorgesehen, der mit Gewindevorsprüngen in ein Steilgewinde der Abtriebswelle eingreift.For the axial displacement of the output shaft, an inner ring cooperating with the rolling elements of the freewheel device is provided, which engages with thread protrusions in a steep thread of the output shaft.

Zeichnungdrawing

Die Erfindung wird im folgenden anhand der Figur näher erläutert. Diese zeigt einen Längsschnitt durch eine Andrehvorrichtung.The invention is explained in more detail below with reference to the figure. This shows a longitudinal section through a starter.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Die Figur zeigt einen Längsschnitt durch eine Andrehvorrichtung 1. Diese weist ein Gehäuse 2 auf, in dem ein Gleichstrommotor 3 und ein Einrückrelais 4 untergebracht sind. Der Gleichstrommotor 3 weist einen Rotor 5 auf, der auf eine Abtriebswelle 6 wirkt, auf dessen Ende 7 ein Ritzel 8 drehfest angeordnet ist. Für den Anlaßbetrieb einer nicht dargestellten Brennkraftmaschine rückt das Ritzel 8 in die in der Figur gestrichelt eingezeichnete Position 9 vor und spurt dabei in einen Zahnkranz 10 der Brennkraftmaschine ein. Die axiale Verlagerung des Ritzels in die Position 9 wird durch das Einrückrelais 4 veranlaßt. Hierauf wird im nachfolgenden noch näher eingegangen.The figure shows a longitudinal section through a starter device 1. This has a housing 2, in which a direct current motor 3 and an engagement relay 4 are accommodated. The DC motor 3 has a rotor 5 which acts on an output shaft 6, on the end 7 of which a pinion 8 is arranged in a rotationally fixed manner. For the start-up operation of a not shown The internal combustion engine advances the pinion 8 into the position 9 shown in dashed lines in the figure and in the process engages in a ring gear 10 of the internal combustion engine. The engagement of relay 4 causes the pinion to move axially to position 9. This will be discussed in more detail below.

Der Rotor 5 ist mit einem Kommutator 11 versehen, an dessen Segmenten 12 eine Rotorwicklung 13 angeschlossen ist. Der Kommutator 11 wirkt mit einer Kohlebürstenanordnung 14 zusammen. Ferner ist ein Stator 15 mit Statorwicklung 16 vorgesehen, der dem Rotor 5 mit geringem Luftspalt gegenüberliegt.The rotor 5 is provided with a commutator 11, to the segments 12 of which a rotor winding 13 is connected. The commutator 11 interacts with a carbon brush arrangement 14. Furthermore, a stator 15 with a stator winding 16 is provided, which lies opposite the rotor 5 with a small air gap.

Der Rotor 5 weist eine Rotorwelle 17 auf, die an ihrem einen Ende 18 in einem Nadellager 19 gelagert und von einer Gehäusekappe 20 überfangen ist. Das andere Ende der Rotorwelle 17 weist eine von ihrer Stirnseite 21 ausgehende, zentrale Aufnahmebohrung 22 auf, in die das eine Ende 23 der Abtriebswelle 6 eingreift. Dieses andere Ende der Rotorwelle 17 ist über ein Nadellager 31, das in der Aufnahmebohrung 22 angeordnet ist, auf dem Ende 23 der Abtriebswelle 6 gelagert. Die Mantelfläche 24 des mit Aufnahmebohrung 22 versehenen Endes 25 der Rotorwelle 17 ist als Sonnenrad 26 ausgebildet, das mit Planetenrädern 27 kämmt, die auf einem Planetenträger 28 angeordnet sind (in der Figur ist lediglich ein Planetenrad 27 dargestellt). Die Planetenräder 27 sind unter Zwischenschaltung von Nadellager auf Lagerstiften 29 angeordnet.The rotor 5 has a rotor shaft 17 which is supported at one end 18 in a needle bearing 19 and covered by a housing cap 20. The other end of the rotor shaft 17 has a central receiving bore 22 extending from its end face 21, into which the one end 23 of the output shaft 6 engages. This other end of the rotor shaft 17 is mounted on the end 23 of the output shaft 6 via a needle bearing 31, which is arranged in the receiving bore 22. The lateral surface 24 of the end 25 of the rotor shaft 17 provided with the receiving bore 22 is designed as a sun gear 26 which meshes with planet gears 27 which are arranged on a planet carrier 28 (only one planet gear 27 is shown in the figure). The planet gears 27 are arranged with the interposition of needle bearings on bearing pins 29.

Ferner kämmen die Planetenräder 27 mit einem mit Innenverzahnung versehenen Hohlrad 30, das ortsfest im Gehäuse 2 angeordnet ist.Furthermore, the planet gears 27 mesh with a ring gear 30 provided with internal teeth, which is arranged in a stationary manner in the housing 2.

Das Ende 23 der Abtriebswelle 6 ist über ein Nadellager 37 in der Aufnahmebohrung des Axialsteges 39 gelagert. Der Freilaufaußenring 35 wird durch ein Rillenkugellager 38, das auf dem Axialsteg 39 angeordnet ist und sich andererseits im Gehäuse 2 abstützt, gehalten (Festlager). Im gegenüberliegenden Endbereich 32 der Abtriebswelle 6 ist -vom Gehäuse 2 gehalten- ein Zylinderrollenlager 33 vorgesehen, dem -nach außen- ein Simmerring 34 vorgeschaltet ist. Das Zylinderrollenlager 33 führt die Abtriebswelle 6 sowohl in axialer als auch in radialer Richtung.The end 23 of the output shaft 6 is mounted in the receiving bore of the axial web 39 via a needle bearing 37. The freewheel outer ring 35 is held by a deep groove ball bearing 38, which is arranged on the axial web 39 and on the other hand is supported in the housing 2 (fixed bearing). In the opposite end region 32 of the output shaft 6, a cylindrical roller bearing 33 is provided — held by the housing 2, to which a sealing ring 34 is connected upstream — to the outside. The cylindrical roller bearing 33 guides the output shaft 6 both in the axial and in the radial direction.

Der Planetenträger 28 ist axial mit einem Freilaufaußenring 35 über Schrauben 36 verbunden. Der Freilaufaußenring 35 gehört einer Freilaufeinrichtung 40 an, die als Rollenfreilauf ausgebildet ist. Sie weist federbeaufschlagte Rollen 41 auf, die mit einem Innenring 42 der Freilaufeinrichtung 40 zusammenwirken. Der Innenring 42 steht über ein Steilgewinde 43 mit der Abtriebswelle 6 in Verbindung. Ferner weist die Abtriebswelle 6 eine Nut 44 auf, in der ein Sprengring 45 angeordnet ist. Der Sprengring 45 bildet einen Anschlag, der -bei einer noch näher zu beschreibenden- Axialverlagerung der Abtriebswelle 6 mit einer Stufe 46 des Innenrings 42 zusammenwirkt.The planet carrier 28 is axially connected to a freewheel outer ring 35 via screws 36. The freewheel outer ring 35 belongs to a freewheel device 40 which is designed as a roller freewheel. It has spring-loaded rollers 41 which interact with an inner ring 42 of the freewheel device 40. The inner ring 42 is connected to the output shaft 6 via a steep thread 43. Furthermore, the output shaft 6 has a groove 44 in which a snap ring 45 is arranged. The snap ring 45 forms a stop which, in the event of an axial displacement of the output shaft 6 to be described in greater detail, cooperates with a step 46 of the inner ring 42.

Der Freilaufaußenring 35 ist somit als Lagerhülse 160 mit zwei unterschiedlich großen, kreisförmigenThe freewheel outer ring 35 is thus a bearing sleeve 160 with two differently sized, circular

Querschnitten ausgebildet. An der Innenfläche 161 des durchmessergrößeren Abschnitts 162 der Lagerhülse 160 greifen von den Rollen 41 gebildete Wälzkörper 163 der Freilaufeinrichtung 40 an. An der Mantelfläche 164 des durchmesserkleineren Abschnitts 165 der Lagerhülse 160 ist das Rillenkugellager 38 angeordnet. Diesem liegt das Nadellager 37 direkt gegenüber, das in einer zentralen Öffnung 166 des Freilaufaußenrings 35 angeordnet ist.Cross sections formed. Rolling bodies 163 of the freewheel device 40 formed by the rollers 41 act on the inner surface 161 of the larger-diameter section 162 of the bearing sleeve 160. The deep groove ball bearing 38 is arranged on the lateral surface 164 of the smaller diameter section 165 of the bearing sleeve 160. This is directly opposite the needle bearing 37, which is arranged in a central opening 166 of the freewheel outer ring 35.

Auf der Abtriebswelle 6 ist ein Haltering 47 befestigt, der einen Radialkragen 48 aufweist. Ferner liegt in einer Nut 49 des Halterings 47 ein Sprengring 50 ein, der eine Scheibe 51 abstützt. Zwischen Scheibe 51 und Radialkragen 48 wird somit ein Ringkanal 52 ausgebildet.A retaining ring 47, which has a radial collar 48, is fastened on the output shaft 6. Furthermore, a snap ring 50, which supports a disk 51, lies in a groove 49 of the retaining ring 47. An annular channel 52 is thus formed between the disk 51 and the radial collar 48.

Am Ende 7 der Abtriebswelle 6 ist das Ritzel 8 drehfest, jedoch axial verschieblich gelagert. Es wird von einer Schraubendruckfeder 54 beaufschlagt. Diese wird vorgespannt, wenn sich beim Einspuren des Ritzels 8 in den Zahnkranz 10 eine Zahn-Auf-Zahn-Stellung ergibt.At the end 7 of the output shaft 6, the pinion 8 is rotatably but axially displaceably mounted. It is acted upon by a helical compression spring 54. This is preloaded when a tooth-on-tooth position results when the pinion 8 is engaged in the ring gear 10.

Das Einrückrelais 4 weist eine ortsfeste Relaiswicklung 61 auf, die mit einem Anker 62 zusammenwirkt. Der Anker 62 ist axial verschieblich auf einer Achse 63 gelagert und wird von einer als Schraubendruckfeder ausgebildeten Rückstellfeder 64 im nicht erregten Zustand des Einrückrelais' 4 in die in der Figur dargestellte Position gedrängt. Die Achse 63 weist an ihrem einen Endbereich 65 ein Kontaktelement 66 auf, daß mit elektrischen Anschlüssen 67 zusammenwirken kann.The engagement relay 4 has a fixed relay winding 61 which interacts with an armature 62. The armature 62 is axially displaceably mounted on an axis 63 and is urged into the position shown in the figure by a return spring 64 in the form of a helical compression spring when the engagement relay 4 is not energized. The axis 63 has at its one end region 65 a contact element 66 that can interact with electrical connections 67.

Der Anker 62 ist mit einem Stößel 68 verbunden, der in einen Gehäuseraum 69 des Gehäuses 2 hineinragt. Der Stößel 68 wirkt mit einem als Doppelhebel ausgebildeten Einrückhebel 70 zusammen, der etwa in seinem mittleren Bereich mittels eines Querbolzens 71 schwenkbeweglich gelagert ist. Der Querbolzens 71 wird an einem gehäuseseitigen Ausleger 72 gehalten. Das untere Ende 73 des Einrückhebels 70 ist mit einem Vorsprung 74 versehen, der in den Ringkanal 52 eingreift. Am anderen Ende 75 des Einrückhebels 70 ist ein Mitnahmekopf 76 ausgebildet. Durch Verlagerung des Stößels 68 wird der Einrückhebel 70 mitgenommen, wodurch eine Axialverlagerung der Abtriebswelle 6 erfolgt. Im nicht erregten Zustand des Einrückrelais' 4 ist dafür Sorge zu tragen, daß das Ritzel 8 die in der Figur mit durchgezogenen Linien dargestellte Position nicht verläßt. Eine Verriegelungsvorrichtung 77, die im wesentlichen von einer Bügelfeder 80, einer Steuerhülse 108, einem Ring 117 sowie Federn 99 und 112 gebildet ist, verhindert, daß sich das Ritzel 8 unbeabsichtigt in Richtung auf den Zahnkranz 10 der Brennkraftmaschine bewegt, da dies zur Beschädigung der Teile führen könnte. Diese unbeabsichtigte Axialbewegung könnte ohne Verriegelungsvorrichtung 77 dadurch eintreten, daß bremsende Momente, die z.B. durch die Lager und einem Wellendichtring auftreten, die Abtriebswelle 6 in Einspurposition bewegen, das heißt, die Rückstellfederkräfte sind kleiner als die am Steilgewinde auftretenden Axialkraftkomponenten.The armature 62 is connected to a plunger 68 which projects into a housing space 69 of the housing 2. The plunger 68 interacts with an engagement lever 70 designed as a double lever, which is pivotably mounted approximately in its central region by means of a cross bolt 71. The cross pin 71 is held on a housing-side arm 72. The lower end 73 of the engagement lever 70 is provided with a projection 74 which engages in the annular channel 52. At the other end 75 of the engagement lever 70, a driving head 76 is formed. By shifting the plunger 68, the engagement lever 70 is carried along, as a result of which the output shaft 6 is axially displaced. In the de-energized state of the engagement relay 4, care must be taken to ensure that the pinion 8 does not leave the position shown in the figure with solid lines. A locking device 77, which is essentially formed by a bow spring 80, a control sleeve 108, a ring 117 and springs 99 and 112, prevents the pinion 8 from inadvertently moving in the direction of the ring gear 10 of the internal combustion engine, since this would damage the Parts could result. This unintentional axial movement could occur without a locking device 77 in that braking moments, e.g. occur through the bearings and a shaft sealing ring, move the output shaft 6 in the single-track position, that is, the return spring forces are smaller than the axial force components occurring on the high-helix thread.

Aus der Figur ist ersichtlich, daß der Mitnahmekopf 76 den Abstand zwischen der einen Seite 119 des Rings 117 und einer Stirnfläche 120 des Steuerkragens 108 nicht voll ausfüllt; vielmehr verbleibt ein Leerweg b.From the figure it can be seen that the driving head 76 the distance between the one side 119 of the Rings 117 and an end face 120 of the control collar 108 not fully filled; rather, an empty path remains b.

Das Steilgewinde 43 erlaubt eine Axialverlagerung der Abtriebswelle 6 um das Maß a.The steep thread 43 allows an axial displacement of the output shaft 6 by the dimension a.

Am kommutatorseitigen Ende 18 ist die Rotorwelle 17 in einem Rotorlager 147 geführt, das als Nadellager 19 ausgebildet ist.At the commutator end 18, the rotor shaft 17 is guided in a rotor bearing 147, which is designed as a needle bearing 19.

Die erfindungsgemäße Andrehvorrichtung 1 arbeitet folgendermaßen:
Für einen Startvorgang der (nicht dargestellten) Brennkraftmaschine wird über einen Startschalter das Einrückrelais 4 erregt. Dies führt dazu, daß sich der Anker 62 nach rechts (Figur) bewegt, wodurch die Steuerhülse 108 derart gegen die Bügelfeder 80 anläuft, daß diese radial aufgespreizt wird. Hierdurch wird der Ring 117 freigegeben. Eine Relativbewegung zwischen der Steuerhülse 108 und dem Ring 117 ist unter Aufzehrung des Leerweges b deshalb möglich, weil letzterer axial verschieblich auf der Steuerhülse 108 gelagert ist. Nimmt die Bügelfeder 80 ihre aufgespreizte Stellung ein, so ist der Leerweg b aufgebraucht, das heißt, die linke Seite des Mitnahmekopfes 76 wird von der Steuerhülse 108 mitgenommen. Der Einrückhebel 70 führt eine Schwenkbewegung im Uhrzeigersinn um den Querbolzen 71 herum aus. Dabei verlagert der Vorsprung 74 die Abtriebswelle 6 in Richtung auf den Zahnkranz 10, wodurch das Ritzel 8 in die Zahnung des Zahnkranzes 10 einspuren kann. Die Einspurkräfte sorgen dafür, daß nunmehr das Ritzel 8 vollständig in den Zahnkranz 10 einfährt, wobei aufgrund des Steilgewindes 43 die Abtriebswelle 6 bis in Endposition axial herausfährt, so daß -im Ergebnis- die in der Figur mit gestrichelten Linien eingezeichnete Position 9 vom Ritzel 8 eingenommen wird. Da durch die Anzugsbewegung des Einrückrelais' 4 das Kontaktelement 66 in Verbindung zu den elektrischen Anschlüssen 67 tritt, wird der Gleichstrommotor 3 erregt, das heißt, der Rotor 5 beginnt zu drehen, wodurch das Ritzel 8 über das aus Sonnenrad 26, Planetenrädern 27 und Hohlrad 30 gebildete Untersetzungsgetriebe mitgenommen wird.The starting device 1 according to the invention operates as follows:
For a starting process of the internal combustion engine (not shown), the engagement relay 4 is energized via a start switch. This leads to the armature 62 moving to the right (FIG.), As a result of which the control sleeve 108 runs against the bow spring 80 in such a way that the latter is expanded radially. As a result, the ring 117 is released. A relative movement between the control sleeve 108 and the ring 117 is possible while consuming the free travel b because the latter is mounted on the control sleeve 108 so as to be axially displaceable. If the bow spring 80 assumes its spread position, the free travel b is used up, that is to say the left side of the driving head 76 is carried along by the control sleeve 108. The engagement lever 70 pivots clockwise around the cross pin 71. The projection 74 shifts the output shaft 6 in the direction of the ring gear 10, as a result of which the pinion 8 can engage in the toothing of the ring gear 10. The engagement forces ensure that the pinion 8 is now complete retracts into the ring gear 10, the output shaft 6 axially extending to the end position due to the steep thread 43, so that — as a result — the position 9 shown in broken lines in the figure is taken up by the pinion 8. Since the contact element 66 comes into contact with the electrical connections 67 as a result of the pull-in movement of the engagement relay 4, the direct current motor 3 is excited, that is to say the rotor 5 begins to rotate, as a result of which the pinion 8 is driven by the sun gear 26, planet gears 27 and ring gear 30 reduction gear formed is taken.

Wird der Startvorgang beendet, so fällt das Einrückrelais 4 ab. Die Abfallbewegung wird von der Rückstellfeder 64 und 112 unterstützt. Dabei tritt der Ring 117 gegen den Mitnahmekopf 76 des Einrückhebels 70, so daß der Einrückhebel 70 entgegen dem Uhrzeigersinn verschwenkt, wodurch das Ritzel 8 in die in der Figur mit durchgezogener Linie dargestellte Position zurückgeholt wird. Da im Endstadium des Startvorgangs die nunmehr im Betrieb befindliche Brennkraftmaschine die Drehung des Ritzels 8 "überholt" wird durch das Steilgewinde 43 der Ausspurvorgang unterstützt.If the starting process is ended, the engagement relay 4 drops out. The return movement is supported by the return springs 64 and 112. Here, the ring 117 comes against the driving head 76 of the engagement lever 70, so that the engagement lever 70 pivots counterclockwise, whereby the pinion 8 is returned to the position shown in the figure with a solid line. Since the internal combustion engine, which is now in operation, "overtakes" the rotation of the pinion 8 in the final stage of the starting process, the disengagement process is supported by the steep thread 43.

Ist wieder die Ausspurposition (Ruheposition) eingenommen (Figur), so befindet sich auch die Bügelfeder 80 wieder in Ausgangsstellung, das heißt, sie sichert den Ring 117, so daß der Einrückhebel 70 in der in der Figur dargestellten Position fixiert ist. Damit ist eine unbeabsichtigte Axialverlagerung der Abtriebswelle 6 verhindert.When the disengagement position (rest position) is reached again (figure), the bow spring 80 is also in the starting position again, that is, it secures the ring 117, so that the engagement lever 70 is fixed in the position shown in the figure. This prevents unintentional axial displacement of the output shaft 6.

Erfindungsgemäß ist vorgesehen, daß der Endbereich 32 der Abtriebswelle 6 im Zylinderrollenlager 33 lagert. Das andere Ende 23 der Abtriebswelle 6 wird über das Nadellager 37 und den Freilaufaußenring 35 sowie das Rillenkugellager 38 am Gehäuse 2 der Andrehvorrichtung 1 gelagert. Die Rotorwelle 17 hingegen ist im Bereich des Kommutators 11 durch das Nadellager 19 gelagert. Ihr Ende 25 umgreift das Ende 23 der Abtriebswelle und lagert auf dieser mittels des Nadellagers 31.According to the invention, it is provided that the end region 32 of the output shaft 6 is supported in the cylindrical roller bearing 33. The other end 23 of the output shaft 6 is mounted on the housing 2 of the starter device 1 via the needle bearing 37 and the freewheel outer ring 35 and the deep groove ball bearing 38. In contrast, the rotor shaft 17 is supported in the region of the commutator 11 by the needle bearing 19. Its end 25 engages around the end 23 of the output shaft and is supported thereon by means of the needle bearing 31.

Claims (10)

  1. Starting device, in particular a freely disengaging starting device (1), with an electric motor (3), the rotor (5) of which drives, via a free-wheeling clutch (40), a driven shaft (6) which has a pinion (8) for the drive of a gear ring (10) of an internal combustion engine, in which arrangement the end section (7) of the driven shaft (6) which carries the pinion (8) is supported in the front face (2b) of a housing (2) of the starting device, characterized in that the driven shaft (6) is supported with its other end (23) via a first bearing (37) in a central aperture (166) of a free-wheel outer ring (35), the surface (164) of which is supported via a second bearing (38) in a wall (2a) in the interior of the housing (2) of the starting device (1) and that on the end section of the driven shaft (6) which is inside the housing (2) the associated end (25) of a rotor shaft (17) of the starter rotor (5) is supported via a third bearing (31).
  2. Starting device according to Claim 1, characterized in that the first bearing is a needle bearing (37).
  3. Starting device according to one of the preceding claims, characterized in that the second bearing is a deep groove ball bearing (38).
  4. Starting device according to one of the preceding claims, characterized in that the third bearing is a needle bearing (31).
  5. Starting device according to one of the preceding claims, characterized in that the rotor shaft (17) has an axial locating bore (22) in which the thrid bearing (31) is arranged and into which projects the driven shaft (6) with its end (23).
  6. Starting device according to one of the preceding claims, characterized in that the free-wheel outer ring (35) is designed as a stepped bearing sleeve (160) with two circular cross-sections of different size, that on the inner face (161) of the larger diameter section (162) of the bearing sleeve (160) rolling bodies (163) of the free-wheel drive (40) engage, and that the second bearing (38) is arranged on the surface (164) of the smaller diameter section (165) of the bearing sleeve (160).
  7. Starting device according to one of the preceding claims, characterized in that the central aperture (166) of the free-wheel outer ring (35) is formed by the inner wall of the smaller diameter section (165) of the bearing sleeve (160).
  8. Starting device according to one of the preceding claims, characterized in that a pinion cage (28) of a planetary gear mechanism with a sun wheel is coupled to the free-wheel outer ring (35) and that this pinion cage preferably supports several planetary gears (27), which mesh with an annular gear (30) fixed to the housing, and with the sun wheel (26) of the planetary gear mechanism which is driven by the starter rotor (5).
  9. Starting device according to Claim 8, characterized in that the sun wheel (26) is formed on the surface (24) of the rotor shaft (17).
  10. Starting device according to one of the preceding claims, characterized by an inner ring (42), which acts in conjunction with the rolling bodies (163) of the free-wheel device (40), which inner ring engages with thread projections in a coarse thread (43) of the driven shaft (6).
EP91903881A 1990-03-03 1991-02-22 Compact starter device Expired - Lifetime EP0518877B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4006795A DE4006795A1 (en) 1990-03-03 1990-03-03 TURNING DEVICE IN A COMPACT DESIGN
DE4006795 1990-03-03
PCT/DE1991/000144 WO1991014095A1 (en) 1990-03-03 1991-02-22 Compact starter device

Publications (2)

Publication Number Publication Date
EP0518877A1 EP0518877A1 (en) 1992-12-23
EP0518877B1 true EP0518877B1 (en) 1994-10-05

Family

ID=6401406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91903881A Expired - Lifetime EP0518877B1 (en) 1990-03-03 1991-02-22 Compact starter device

Country Status (9)

Country Link
US (1) US5317933A (en)
EP (1) EP0518877B1 (en)
JP (1) JPH05504809A (en)
KR (1) KR100190481B1 (en)
DE (2) DE4006795A1 (en)
ES (1) ES2062768T3 (en)
PL (1) PL167304B1 (en)
RU (1) RU2050461C1 (en)
WO (1) WO1991014095A1 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2719631B1 (en) * 1994-05-05 1996-05-31 Valeo Equip Electr Moteur Motor vehicle starter having an improved driver body.
AU1076895A (en) * 1994-11-24 1996-06-17 Nippondenso Co. Ltd. Starter with planetary reduction gear mechanism
US5953955A (en) * 1994-11-24 1999-09-21 Nippondenso Co., Ltd. Starter with planetary gear speed reduction mechanism
DE19625057C1 (en) * 1996-06-22 1997-07-10 Bosch Gmbh Robert Starting device for internal combustion engine
DE29719524U1 (en) * 1997-11-04 1999-03-04 Robert Bosch Gmbh, 70469 Stuttgart Starting device for internal combustion engines
DE19748605B4 (en) * 1997-11-04 2013-12-19 Robert Bosch Gmbh Starting device for internal combustion engines
WO2000026533A1 (en) * 1998-11-03 2000-05-11 Delco Remy America, Inc. Engine starter having an axially stationary overrun clutch
US6460298B1 (en) 2000-09-08 2002-10-08 Steven A. Elias Landscape edging and border structure
JP2002180936A (en) * 2000-12-08 2002-06-26 Denso Corp Starter
JP3849455B2 (en) * 2001-04-27 2006-11-22 株式会社デンソー Starter
KR20040069114A (en) * 2003-01-28 2004-08-04 발레오만도전장시스템스코리아 주식회사 Over hang type starter motor equipped with watertight structure and vibrator isolation structure
US20040207276A1 (en) * 2003-04-21 2004-10-21 Eugene Chiappe Clutched starter motor assembly for aircraft piston
FR2935029B1 (en) * 2008-08-12 2012-05-04 Valeo Equip Electr Moteur STARTER COMPRISING AN ARMOR ARMOR CARRIED BY A BEARING INTERPOSE BETWEEN INDUCTOR AND REDUCTOR
US8575802B2 (en) 2010-02-03 2013-11-05 Src Electrical Llc Locomotive starter motor
WO2011097377A1 (en) * 2010-02-03 2011-08-11 Electro-Motive Diesel, Inc. Locomotive starter motor
EP3428444A1 (en) 2017-07-10 2019-01-16 Mahle International GmbH Starter motor for an internal combustion engine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1039685A (en) * 1911-12-26 1912-10-01 Vincent G Apple Power-transmission device.
DE1124304B (en) * 1959-07-13 1962-02-22 Garbe Lahmeyer & Co Ag Roller freewheel of screw drives on starting motors of internal combustion engines
US3584713A (en) * 1968-06-15 1971-06-15 Aisin Seiki Automatic four-wheel drive mechanism
DE2624645A1 (en) * 1976-06-02 1977-12-22 Bosch Gmbh Robert PUSH DRIVE FOR A TURNING DEVICE OF COMBUSTION MACHINES
CA1141994A (en) * 1980-09-13 1983-03-01 Norimitsu Kurihara Starting motor device
DE3042436A1 (en) * 1980-11-11 1982-06-16 Volkswagenwerk Ag, 3180 Wolfsburg Automotive IC engine starter system - has engagement pinion driving layshaft drive accommodated in motor drive housing
DE3225957A1 (en) * 1982-07-10 1984-01-12 Robert Bosch Gmbh, 7000 Stuttgart TURNING DEVICE FOR INTERNAL COMBUSTION ENGINES
JPS63134171U (en) * 1987-02-25 1988-09-02
JPH0720354B2 (en) * 1988-03-17 1995-03-06 三菱電機株式会社 Coaxial starter
FR2635144B1 (en) * 1988-08-06 1994-02-04 Mitsubishi Denki Kk GEAR MOVEMENT MECHANISM OF AN ENGINE STARTER

Also Published As

Publication number Publication date
WO1991014095A1 (en) 1991-09-19
US5317933A (en) 1994-06-07
DE4006795A1 (en) 1991-09-05
KR937000772A (en) 1993-03-16
JPH05504809A (en) 1993-07-22
PL167304B1 (en) 1995-08-31
RU2050461C1 (en) 1995-12-20
EP0518877A1 (en) 1992-12-23
PL289241A1 (en) 1992-08-24
ES2062768T3 (en) 1994-12-16
DE59103175D1 (en) 1994-11-10
KR100190481B1 (en) 1999-06-01

Similar Documents

Publication Publication Date Title
EP0518877B1 (en) Compact starter device
DE69507229T2 (en) Starter
WO1998032966A1 (en) Circuit for a latching relay
DE10016706A1 (en) Starting device
EP0518895B1 (en) Starting device with drive shaft lock
DE69509027T2 (en) Starter
WO2010069645A1 (en) Method and device for start-stop systems of internal combustion engines in motor vehicles
EP2435688B1 (en) Method for mechanically synchronizing two rotating, axially offset spur gears
WO2008145642A1 (en) System comprising a starting device and an internal combustion engine, starting device, and internal combustion engine
DE69201872T2 (en) Starter device.
DE102008042525A1 (en) starter
EP0518878B1 (en) Starter system with braking device
DE10135141A1 (en) starter
EP2504563B1 (en) Dispositif de démarrage optimisé en terme de bruit
DE4030813C2 (en) Coaxial type starter for internal combustion engines
DE29704299U1 (en) Starting device for internal combustion engines
DE69900087T2 (en) Starter with means for limiting the rotation of the pinion
DE102011015691A1 (en) Electrical drive device i.e. inline gearbox, for car, has electric motor including stator, rotor and driven shaft, where rotor and driven shaft are coupled with one another by switchable coupling device arranged inside rotor
DE69006171T2 (en) Starter.
EP2472101B1 (en) Device for securing a pinion
DE69207927T2 (en) Starting device
WO1982002419A1 (en) Starter for combustion engine
DE19727545B4 (en) Starting device for internal combustion engines
DE29719524U1 (en) Starting device for internal combustion engines
DE102009046985A1 (en) Starter gear with Planetentellerlagerung

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: 19920730

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT

17Q First examination report despatched

Effective date: 19940328

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59103175

Country of ref document: DE

Date of ref document: 19941110

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19941013

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2062768

Country of ref document: ES

Kind code of ref document: T3

ITF It: translation for a ep patent filed
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: ES

Payment date: 19990208

Year of fee payment: 9

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

Ref country code: GB

Payment date: 19990210

Year of fee payment: 9

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

Ref country code: FR

Payment date: 19990219

Year of fee payment: 9

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

Ref country code: DE

Payment date: 19990511

Year of fee payment: 9

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000222

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

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000223

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

Effective date: 20000222

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001031

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

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001201

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010910

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

Effective date: 20050222