EP0582429A1 - Verbundumlaufgetriebevorrichtung für Anlasser eines Verbrennungsmotors - Google Patents

Verbundumlaufgetriebevorrichtung für Anlasser eines Verbrennungsmotors Download PDF

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Publication number
EP0582429A1
EP0582429A1 EP93305940A EP93305940A EP0582429A1 EP 0582429 A1 EP0582429 A1 EP 0582429A1 EP 93305940 A EP93305940 A EP 93305940A EP 93305940 A EP93305940 A EP 93305940A EP 0582429 A1 EP0582429 A1 EP 0582429A1
Authority
EP
European Patent Office
Prior art keywords
planet
shaft
gear
planetary gear
armature shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP93305940A
Other languages
English (en)
French (fr)
Inventor
Michael A. Szalay
David Jorgensen
Donald L. Carriere
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.)
Ford Motor Co
Original Assignee
Ford Motor Co
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 Ford Motor Co filed Critical Ford Motor Co
Publication of EP0582429A1 publication Critical patent/EP0582429A1/de
Withdrawn legal-status Critical Current

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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
    • 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

Definitions

  • This invention relates to starter motors for vehicles, and more particularly to a starter motor having a compound planetary gear reduction system.
  • the starter motor is capable of armature shaft speeds much higher than the rotational speed required to start the engine, which is generally between 60 and 100 revolutions per minute for spark ignition engines, and about 80 to 200 revolutions per minute for diesel engines. Because the torque required to start the engine is greater than the starter motor armature is capable of generating, however, some provision must be made to translate the speed of the starter motor to increased torque.
  • the gear set typically consists of a ring gear fixed to the starter motor housing, a pinion rotatable with the armature shaft, and at least one planet gear which engages both the pinion and the ring gear.
  • the gear set typically consists of a ring gear fixed to the starter motor housing, a pinion rotatable with the armature shaft, and at least one planet gear which engages both the pinion and the ring gear.
  • the described simple planetary gear set increases the torque, and reduces the speed, of the output shaft with respect to the starter motor armature shaft.
  • a starter motor equipped with a simple planetary gear set can generate an output power equivalent to a direct drive, i.e. non-gear reduced, starter motor, while at the same time having motor components of lesser size and weight.
  • More complex compound planetary gear systems have been proposed for use in a wide variety of applications. These designs typically include two or more planet gears mounted on a common shaft.
  • U.S. Patent No. 3,081,648 to Duer for instance, teaches a compound epicyclic gear mechanism for use in a servo control mechanism of the type used in computers, navigational control instruments, guidance control systems, and the like.
  • U.S. Patent No. 3,640,150 to Leiner et al. discloses the use of compound planetary gears for actuation of hinged aircraft components such as wing flaps or wheel well doors.
  • the present invention is an improved compound planetary gear apparatus for transferring rotation from an armature shaft of the starter motor of a vehicle to an output shaft to crank the engine.
  • the apparatus comprises a pinion mounted on the armature shaft, a relatively stationary ring gear, a plurality of planet shafts, and a plurality of planetary gear sets.
  • Each of the planet shafts is connected to the output shaft and is orbitable about the armature shaft.
  • Each planetary gear set includes two planet gears mounted on an associated planet shaft. One of the planet gears engages the pinion so that the rotation of the pinion is transferred to the first planet gear.
  • the other planet gear is rotatable with the first planet gear, and engages the ring gear so that the associated planet shaft orbits the armature shaft and imparts rotation to the output shaft sufficient to crank the engine.
  • the present invention provides an apparatus which effects a more efficient means of obtaining larger gear reduction between the motor armature shaft and the output shaft than is available from simple planetary gear sets.
  • the present invention provides an apparatus which has a large gear reduction ratio.
  • the present invention provides an apparatus which allows smaller and lighter motor armatures and motor field components, and which maintains an output power equivalent to direct drive or simple planetary gear reduced starter motors.
  • Figures 1 and 2 show a compound planetary gear apparatus 10 according to the present invention for transferring rotation from an armature shaft 12 of a starter motor 14 of a motor vehicle to an output shaft 16. Rotation of the output shaft 16 can thereafter be transferred to a crankshaft of the vehicle engine (not shown) to start the engine, as described below.
  • a motor housing 18 of the starter motor 14 supports therein a series of field flux generating devices such as conventional field coils or permanent magnets, as is well known.
  • the flux generating devices act to rotate the armature shaft 12 at a relatively high rate of speed when the ignition switch of the motor vehicle is turned to the start position, as is also well known in the art.
  • the compound planetary gear apparatus 10 comprises a pinion 20, a ring gear 22, a plurality of planet shafts 24, 26, 28 and 30, and a plurality of planetary gear sets 32, 34, 36 and 38.
  • the pinion 20 is fixedly mounted on the armature shaft 12, and therefore rotates at a relatively high speed with the armature shaft 12 when the ignition switch is turned to the start position.
  • the ring gear 22 is fixedly mounted to the motor housing 18, and is therefore maintained stationary with respect to the rotation of the armature shaft 12.
  • the motor housing 18 is about three inches in diameter, and holds the ring gear 22 disposed concentrically around the armature shaft 12.
  • Each of the planet shafts 24, 26, 28 and 30 is affixed to a plate member 40 which is integral with one end of the output shaft 16.
  • the plate member 40 is thus rotatable in the motor housing 18, and supports the planet shafts 24, 26, 28 and 30 such that each one extends to a point between the armature shaft 12 and the ring gear 22.
  • Each planet shaft 24, 26, 28 and 30 is orbitable about the armature shaft 12 as the plate member 40 and the output shaft 16 rotate.
  • the embodiment shown in Figures 1 and 2 includes four planet shafts arranged equilangularly around the armature shaft 12, it should be understood that only a single planet shaft is necessary to effect the function of the present invention.
  • the planetary gear sets 32, 34, 36 and 38 are mounted on and supported by the planet shafts 24, 26, 28 and 30.
  • Each of the planetary gear sets 32, 34, 36 and 38 includes a set of two planet gears.
  • the planetary gear set 36 which comprises a first planet gear 44 and a second planet gear 46 on the planet shaft 28.
  • the first planet gear 44 is rotatably mounted on the planet shaft 28 by bearings pressed into the first planet gear 44.
  • the first planet gear 44 engages the pinion 20 so that the rotation of the armature shaft 12 is transferred to the first planet gear 44.
  • the second planet gear 46 is similarly rotatably mounted on the planet shaft 28, and is attached to the first planet gear 44 so as to be rotatable therewith about the axis of rotation defined by the planet shaft 28.
  • the second planet gear 46 has a diameter less than the diameter of the first planet gear 44, and as the second planet gear 46 rotatably engages the ring gear 22, the planet shaft 28, drives carrier plate 40 and integral output shaft 16.
  • first and second planet gears 44 and 46 can be attached directly to the planet shaft 28 so as to be relatively non-rotatable with the planet shaft 28.
  • the planet shaft 28 and the other planet shafts 24, 26 and 30 would be rotatably supported on the plate member 40 of the output shaft 16.
  • rotation and torque of the armature shaft 12 is transmitted from the pinion 20 to the first planet gear 44 and the other first planet gears of the gear sets 32, 34 and 38, generating a change in speed from the armature shaft 12 to the planetary gear sets proportionate to the relative diameters of the gears and the number of teeth on each gear.
  • the second planet gear 46 which rotates at the same speed as the first planet gear 44, contacts the stationary ring gear 22 and travels circumferentially therealong.
  • the compound planetary gear sets 32, 34, 36 and 38 thus rotate around the axes of the planet shafts to which they are mounted, and the planetary gear shafts 24, 26, 28 and 30 in turn revolve around the axis of the pinion 20 and the output shaft 16. Motion and torque are thus transmitted to the output shaft 16.
  • a starter drive 48 includes a pinion 50 and an overrunning clutch 52.
  • the pinion 50 is driven by the overrunning clutch 52 which is shiftably disposed on and driven by the output shaft 16.
  • the pinion 50 is meshable with a flywheel (not shown) on the engine to be cranked.
  • an end 54 of the motor housing 18 has an opening (not shown) to accommodate meshing of the pinion 50 with the flywheel of the engine, as is well known in the art.
  • a helical spline 56 is also provided on the output shaft 16, and is adapted to cooperate with matching helical grooves in the overrunning clutch 52 to cause the starter drive 48 to rotate slightly whenever the starter drive 48 is shifted axially relative to the output shaft 16 by an engagement lever 58 of a solenoid 60.
  • the axial shifting of the starter drive 48 brings the pinion 50 into engagement with the flywheel of the engine.
  • the compound planetary gear apparatus of the present invention provides a reduction ratio between the speeds of the armature shaft 12 and the output shaft 16 of about 9.5 to 1, as compared with typical reduction ratios available from simple planetary gear sets of about 4.36 to 1. It should be understood that the reduction ratio of the present invention can be varied by varying the number of teeth on each of the gears, and/or the diameters of the gears.
  • the compound planetary gear apparatus of the present invention generates an output torque of about 10 to 12 ft-lbs and a peak power of about 1 to 2 kW, which is comparable to the output torque and power available from direct drive or conventional simple planetary gear reduced starter motors. Furthermore, the components of the present invention are lighter and smaller than those of either direct drive or conventional simple planetary gear mechanisms.

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)
  • Retarders (AREA)
EP93305940A 1992-08-06 1993-07-27 Verbundumlaufgetriebevorrichtung für Anlasser eines Verbrennungsmotors Withdrawn EP0582429A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US92515592A 1992-08-06 1992-08-06
US925155 1992-08-06

Publications (1)

Publication Number Publication Date
EP0582429A1 true EP0582429A1 (de) 1994-02-09

Family

ID=25451300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93305940A Withdrawn EP0582429A1 (de) 1992-08-06 1993-07-27 Verbundumlaufgetriebevorrichtung für Anlasser eines Verbrennungsmotors

Country Status (3)

Country Link
EP (1) EP0582429A1 (de)
JP (1) JPH06159205A (de)
CA (1) CA2101606A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996019662A1 (en) * 1994-12-19 1996-06-27 Nippondenso Co., Ltd. Starter
US5857380A (en) * 1996-02-16 1999-01-12 Denso Corporation Starter having planetary gear reduction device
US5953955A (en) * 1994-11-24 1999-09-21 Nippondenso Co., Ltd. Starter with planetary gear speed reduction mechanism
EP2067984A3 (de) * 2007-12-05 2010-05-19 Denso Corporation Anlasser mit zwei Planetengetriebedrehzahlminderern mit unterschiedlichen Drehzahlminderungsverhältnissen
EP2011999A3 (de) * 2007-07-05 2010-05-19 Denso Corporation Drehzahlreduktionsstarter für Motoren
EP2048356A3 (de) * 2007-10-11 2010-05-19 Denso Corporation Drehzahlreduktionsstarter für Motoren
CN102536577A (zh) * 2010-11-03 2012-07-04 通用汽车环球科技运作有限责任公司 多齿轮比起动器马达
CN110043616A (zh) * 2018-01-17 2019-07-23 迪尔公司 自动双模式高减速比动力传动系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09508191A (ja) * 1994-11-24 1997-08-19 日本電装株式会社 遊星歯車減速機構付スタータ

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB145527A (en) * 1919-05-26 1921-04-07 Bosch Robert Improvements relating to electric starting devices for internal combustion engines
US4573364A (en) * 1984-08-15 1986-03-04 General Motors Corporation Gear reduction starter drive

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB145527A (en) * 1919-05-26 1921-04-07 Bosch Robert Improvements relating to electric starting devices for internal combustion engines
US4573364A (en) * 1984-08-15 1986-03-04 General Motors Corporation Gear reduction starter drive

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5953955A (en) * 1994-11-24 1999-09-21 Nippondenso Co., Ltd. Starter with planetary gear speed reduction mechanism
WO1996019662A1 (en) * 1994-12-19 1996-06-27 Nippondenso Co., Ltd. Starter
US5760485A (en) * 1994-12-19 1998-06-02 Nippondenso Co., Ltd. Starter
US5857380A (en) * 1996-02-16 1999-01-12 Denso Corporation Starter having planetary gear reduction device
EP2011999A3 (de) * 2007-07-05 2010-05-19 Denso Corporation Drehzahlreduktionsstarter für Motoren
US8091443B2 (en) 2007-07-05 2012-01-10 Denso Corporation Speed reduction type starter for engines
EP2048356A3 (de) * 2007-10-11 2010-05-19 Denso Corporation Drehzahlreduktionsstarter für Motoren
EP2067984A3 (de) * 2007-12-05 2010-05-19 Denso Corporation Anlasser mit zwei Planetengetriebedrehzahlminderern mit unterschiedlichen Drehzahlminderungsverhältnissen
CN102536577A (zh) * 2010-11-03 2012-07-04 通用汽车环球科技运作有限责任公司 多齿轮比起动器马达
US8826878B2 (en) 2010-11-03 2014-09-09 GM Global Technology Operations LLC Multiple gear ratio starter motor
CN102536577B (zh) * 2010-11-03 2015-06-03 通用汽车环球科技运作有限责任公司 多齿轮比起动器马达
CN110043616A (zh) * 2018-01-17 2019-07-23 迪尔公司 自动双模式高减速比动力传动系统

Also Published As

Publication number Publication date
CA2101606A1 (en) 1994-02-07
JPH06159205A (ja) 1994-06-07

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