US3664201A - Starter drive for combustion engines - Google Patents

Starter drive for combustion engines Download PDF

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Publication number
US3664201A
US3664201A US81348A US3664201DA US3664201A US 3664201 A US3664201 A US 3664201A US 81348 A US81348 A US 81348A US 3664201D A US3664201D A US 3664201DA US 3664201 A US3664201 A US 3664201A
Authority
US
United States
Prior art keywords
coupling
coupling element
starter drive
sleeve
pinion
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
US81348A
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English (en)
Inventor
Erich Vogel
Gunther Ullmann
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
Application granted granted Critical
Publication of US3664201A publication Critical patent/US3664201A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02N15/06—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • 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

Definitions

  • An axially shiftable rotatable rod is mounted with radial clearance in the hollow output shaft of a motor.
  • a pinion is I fixed on the rod and at least in part located outwardly beyond .the shaft so that it can mesh with a gear of a combustion engine to be started.
  • a sleeve surrounds the rod fixed with the pinion and has an outer steep-pitch thread.
  • a motion-trans- I mitting coupling is provided including a first coupling element mounted in the shaft for rotation therewith and a second coupling element carried by the sleeve for rotation therewith.
  • the coupling elements are provided with mechanically interlockable coupling projections and damping means is located between the sleeve and the first coupling portion and serves for damping axially directed forces.
  • the present invention relates generally to starter drives, and specifically to starter drives for combustion engines.
  • starter drives for combustion engines including a sliding type having a positively driven and a following coupling portion, which are constructed as friction disks which are slid or pushed into frictional abutment with one another for motion-transmitting purposes, when the starter drive is energized.
  • the present invention is concerned with this type of starter drive, where two coupling portions or coupling elements are brought into motion-transmitting engagement.
  • a concomitant object of the invention is to provide such an improved starter drive which is capable of withstanding high stresses, such as for instance occur during starting of rapidly rotating direct-injection diesel engines, and which has a long life and is highly resistant to wear.
  • Still another object of the invention is to provide such an improved starter drive which is simple in its construction.
  • a starter drive for combustion engines which, briefly stated, comprises a motor having a hollow output shaft and an axially shiftable rotatable rod mounted with radial clearance in this shaft.
  • a pinion is fixed on the rod and at least in part extends outwardly beyond the shaft so that it can mesh with a gear which in turn is intended to transmit motion to the combustion engine to be started.
  • a sleeve surrounds the rod fixed with the pinion and has an external steep-pitch thread.
  • Motion-transmitting coupling means is provided including a first coupling element mounted in the shaft for rotation therewith, and a second coupling element carried by the sleeve.
  • Cooperating interlockable coupling portions are provided on the coupling elements and damping means is located between the sleeve and the first coupling portion and is operative for damping axially directed forces.
  • FIGURE is a partially broken-away, partially longitudinally sectioned fragmentary illustration of one embodiment of the invention.
  • reference numeral 39 identifies a rotatable gear having an outer annulus of gear teeth, and being connected in suitable manner with a combustion engine which is to be started.
  • the combustion engine and the axis of rotation of the gear 39 have not been illustrated, nor has the gear 39 itself been illustrated in more than fragmentary form.
  • the reason for this is that the gear 39, its arrangement and its connection with a combustion engine, are all entirely conventional and neither form a part of the present invention nor present any problems of understand ing to those skilled in the art.
  • the present invention is concerned solely with the novel starter drive which can be substituted in toto for any prior-art starter drive of the type driving a gear which in turn is connected in motion-transmitting relationship with a combustion engine. Therefore, the cooperation of the novel starter drive with such a gear and with such a combustion engine will be readily understood by those having ordinary skill in this field.
  • reference numeral 10 identifies a fragmentarily illustrated, electrically operable starter motor 10 surrounded by a housing 11 whose open side is closed by a bearing flange 12.
  • the motor 10 in this embodiment is of the type which can be energized to turn over at a low number of rotations per minute, as well as being capable of energization for turning over at a high number of rotations per minute. Again, the manner in which this is done is well known to those skilled in the art and is thereforenot believed to require a separate description.
  • the output shaft 13, which is rotated when the motor 10 is I energized, is hollow and has secured to it a cup-shaped entrainment member or driver 14 the open side of which is closed by a closure member 15 which in turn is tumably journalled in the flange 12 by means of a ball bearing 16.
  • An axially shiftable rod 17 extends through the hollow output shaft 13, the cover 15 and the flange 12, and carries for rotation with it a pinion l8 and a sleeve 20 which is non-' rotatably connected with the pinion 18 by the key 21 and provided on its outer circumferential surface with a steep-pitch thread 19 as illustrated.
  • a nut 22 fixedly connects the pinion l8 and sleeve 20 with the rod 17.
  • a roller bearing 23 journals the sleeve 20 in the flange l2,
  • the sleeve 20 is both rotatable and axially shiftable together with the pinion and the rod 17.
  • An annular member 25 surrounds that portion of the sleeve 20 which is provided with the steep-pitched thread 19 and is provided with a correspondingly pitched internal thread meshing with the thread 19.
  • the member 25 constitutes the driven part of a coupling for motion-transmitting purposes between the motor 10 and the pinion 18.
  • the counterpart, that is the driving part of the coupling is in form of an annular disk or plate 26 which is slidably accommodated on a hub 27 of the annular member 25 and provided on its circumference with at least one but in the illustrated embodiment several radial projections 28.
  • the driver 14 is provided with a plurality of circumferentially distributed longitudinal slots 29, the number of such slots evidently corresponding to the number of projections 28, and the projections 28 each are received with some play in the respective slots 29 and have freedom of movement axially of the slots 29 and therefore of the shaft 13.
  • the facing end faces of the members 25 and 26 are each provided with an annulus of sawtoothshaped coupling projections or teeth 30a and 30b, respectively, and these are normally urged into meshing engagement by the biasing force of a helical spring 32 which bears upon the member 25 and an abutment ring 31 mounted on the sleeve 20.
  • damping means here in form of a plurality of disk springs 33 which abut against a shoulder 34 provided on this purpose on the sleeve 20.
  • the coupling member 26 in turn abuts against the springs 33 with that one of its axial end faces which is remote from the one provided with the teeth 30b.
  • the teeth 30a of the member 25 and the teeth 30b of the member 26 together constitute an overrunning clutch which permits a relative rotation of the pinion 18 and the output shaft 13 when the combustion engine has started and, turning over under its own power, rotates the pinion 18 with a number of revolutions higher than that of the shaft 13.
  • a centrifugal separating device located between the members 25 and 26 and composed of a ball cage 35, balls or spherical members 36 and a conical ring 37.
  • the ball cage 35 is fixedly accommodated in a recess 38 of ring-shaped outline in the member 25; the balls 36 are accommodated in the cage 35 and the conical ring 37 is fastened in a recess 39 provided on that end face of the member 26 which is directed towards the member 25.
  • the inner conically diverging surface 40 of the ring 37 engages the balls 36 and the components are so configurated and dimensioned that even when the teeth 30a, 30b are fully in engagement with one another, the balls 36 are retained axially without play between the cage 35 and the ring 37.
  • Energization results from the energization of a non-illustrated displacing relay which causes the rod 17 with the sleeve 20 and the pinion 18 to shift axially towards the gear 39 of the non-illustrated combustion engine to be started.
  • the motor is energized at reduced voltage so that the shaft 13 rotates slowly with its rotation being transmitted via the driver 14, the member 26, the teeth 30b and 30a, the member 25, the thread 19, the sleeve 20 and the key 21, to the pinion 18.
  • the pinion 18 thus is in slow rotation as it is advanced against the gear 39 with which it is intended to cooperate.
  • a non-illustrated main current switch is closed, that is the motor 10 is now fully energized and the shaft rotates at higher speed whereby the pinion 18 turns over the combustion engine via the gear 39, until such time as the combustion engine begins to turn over by itself. Once this takes place, it will be the gear 39 which accelerates the pinion 18, so that the latter now turns faster than the shaft 13 of the motor 10.
  • the pinion exerts a circumferential force via the thread 19 and trailing flanks of the teeth 30a, on the teeth 30b of the member 26 whereby the load acting upon the teeth 30a, 30b is reversed and because of their sawtoothshaped configuration and the action exerted by the steeplypitched thread 19, on the member 25, the teeth 30a, 30b separate against the urging of the spring 32 so that the pinion 18 can turn freely with reference to the shaft 13.
  • a starter drive for combustion engines comprising a motor having a hollow output shaft; an axially shiftable rotatable rod mounted with radial clearance in said shaft; a pinion fixed on said rod and at least in part extending outwardly beyond said shaft; a sleeve surrounding said rod fixed with said pinion and having a steep-pitch external thread; motion-transmitting coupling means, including a first coupling element mounted on said sleeve for rotation therewith and having an axially extending hub, and a second coupling element carried by said hub; cooperating interlockable coupling portions on said coupling elements; and damping means between said sleeve and second coupling element and operative for damping axially directed forces.
  • a starter drive as defined in claim I said sleeve having a radial outer shoulder proximal to said pinion intermediate the same and said thread; and wherein said damping means comprises annular spring means surrounding said sleeve and abutting against said shoulder.
  • said centrifugal means comprising a recess of circular outline provided in an axial end face of said first coupling element which is directed towards said second coupling element, a cage received in said recess and accommodating at least two equi-angularly spaced spherical members, and a conically configurated ring fixed with said second coupling element extending into said recess and having an inner circumferential surface contacting said spherical elements and conically diverging towards said first coupling element.
  • a starter drive as defined in claim 1 said second coupling element being an annulus and having an axially directed end face facing towards said first coupling element; and wherein said coupling portions are first coupling projections on said end face and second coupling projections on said first coupling element.
  • said biasing means comprising a helical spring having opposite ends one of which bears upon said first coupling element, and an annular abutment on said sleeve at a side of said first coupling element which is axially remote from said second coupling element, the other end of said spring bearing upon said abutment means.

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)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
  • Gear Transmission (AREA)
  • Transmission Devices (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
US81348A 1969-11-11 1970-10-16 Starter drive for combustion engines Expired - Lifetime US3664201A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691956518 DE1956518A1 (de) 1969-11-11 1969-11-11 Schubtrieb fuer Andrehmotoren von Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3664201A true US3664201A (en) 1972-05-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US81348A Expired - Lifetime US3664201A (en) 1969-11-11 1970-10-16 Starter drive for combustion engines

Country Status (6)

Country Link
US (1) US3664201A (enExample)
JP (1) JPS4835642B1 (enExample)
DE (1) DE1956518A1 (enExample)
ES (1) ES163125Y (enExample)
FR (1) FR2066172A5 (enExample)
GB (1) GB1289878A (enExample)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020935A (en) * 1975-07-01 1977-05-03 Facet Enterprises, Inc. Direct cranking starter drive
US5220844A (en) * 1992-07-06 1993-06-22 Ingersoll-Rand Company Infinite position mounting flange
US6026695A (en) * 1998-06-16 2000-02-22 Ingersoll-Rand Company Engine starter housing and an annular housing extension therefor
US6076413A (en) * 1997-01-16 2000-06-20 Valeo Equipements Electriques Moteur Motor vehicle starter with an epicyclic reducing gear train including a torque limiting device
US20100077769A1 (en) * 2008-09-29 2010-04-01 John Andrew Layer Starter drive assembly and method of starting a gas turbine engine
US20100082218A1 (en) * 2008-09-29 2010-04-01 John Andrew Layer Starter drive assembly and method of starting an engine
WO2011097377A1 (en) * 2010-02-03 2011-08-11 Electro-Motive Diesel, Inc. Locomotive starter motor
US8575802B2 (en) 2010-02-03 2013-11-05 Src Electrical Llc Locomotive starter motor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA783651B (en) * 1977-07-01 1979-06-27 Lucas Industries Ltd Starter motor
US4488054A (en) * 1982-04-13 1984-12-11 Hitachi, Ltd. Starter apparatus
DE102011084235B4 (de) * 2011-10-10 2020-08-27 Seg Automotive Germany Gmbh Andrehvorrichtung zum Andrehen einer Brennkraftmaschine und Verfahren zur Herstellung einer Andrehvorrichtung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2318209A (en) * 1941-06-25 1943-05-04 Briggs & Stratton Corp Manually engaged engine starter
US2422319A (en) * 1945-05-04 1947-06-17 Briggs & Stratton Corp Engine starter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2318209A (en) * 1941-06-25 1943-05-04 Briggs & Stratton Corp Manually engaged engine starter
US2422319A (en) * 1945-05-04 1947-06-17 Briggs & Stratton Corp Engine starter

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020935A (en) * 1975-07-01 1977-05-03 Facet Enterprises, Inc. Direct cranking starter drive
US5220844A (en) * 1992-07-06 1993-06-22 Ingersoll-Rand Company Infinite position mounting flange
US6076413A (en) * 1997-01-16 2000-06-20 Valeo Equipements Electriques Moteur Motor vehicle starter with an epicyclic reducing gear train including a torque limiting device
US6026695A (en) * 1998-06-16 2000-02-22 Ingersoll-Rand Company Engine starter housing and an annular housing extension therefor
US20100077769A1 (en) * 2008-09-29 2010-04-01 John Andrew Layer Starter drive assembly and method of starting a gas turbine engine
US20100082218A1 (en) * 2008-09-29 2010-04-01 John Andrew Layer Starter drive assembly and method of starting an engine
US8014934B2 (en) 2008-09-29 2011-09-06 General Electric Company Starter drive assembly and method of starting an engine
WO2011097377A1 (en) * 2010-02-03 2011-08-11 Electro-Motive Diesel, Inc. Locomotive starter motor
US8575802B2 (en) 2010-02-03 2013-11-05 Src Electrical Llc Locomotive starter motor

Also Published As

Publication number Publication date
ES163125U (es) 1971-02-01
PL72932B1 (enExample) 1974-08-30
GB1289878A (enExample) 1972-09-20
FR2066172A5 (enExample) 1971-08-06
JPS4835642B1 (enExample) 1973-10-30
ES163125Y (es) 1971-08-01
DE1956518A1 (de) 1971-05-19

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