US3691854A - Starter drive for combustion engines - Google Patents

Starter drive for combustion engines Download PDF

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Publication number
US3691854A
US3691854A US103134A US3691854DA US3691854A US 3691854 A US3691854 A US 3691854A US 103134 A US103134 A US 103134A US 3691854D A US3691854D A US 3691854DA US 3691854 A US3691854 A US 3691854A
Authority
US
United States
Prior art keywords
starter drive
annular
confined spaces
pinion
drive
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
US103134A
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English (en)
Inventor
Otto Barthruff
Walter Ruhle
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 US3691854A publication Critical patent/US3691854A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D41/00—Freewheels or freewheel clutches
    • F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
    • F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
    • F16D41/066—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
    • F16D41/067—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical and the members being distributed by a separate cage encircling the axis of rotation
    • 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
    • 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 inner annular element is surrounded by the outer element and connected with the pinion, and a plurality of curved cam tracks on the inner circumference of the outer element are angularly offset about and eccentric to the axis of the same, defining with the inner body confined spaces which converge in circumferential direction.
  • An annular disc is stationarily received between these elements and provided with axial projections each having a surface elongated in circumferential direction, and rolling bodies are accommodated in the confined spaces.
  • Pressure springs are also accommodated in the respective confined spaces abutting and guided by the surfaces and also abutting against the rolling bodies, urging the latter circumferentially in the direction of convergence of the spaces.
  • the present invention relates generally to starter drives for combustion engines, and more particularly to an improved starter drive of a simpler and less expensive construction than heretofore known.
  • starter drives having a pinion, an inner annular body connected with the pinion, and an outer annular body connected via a flange with a hollow drive shaft.
  • the outer annular body has on its inner circumference angularly offset curved cam tracks which extend eccentrically with reference to the shaft axis and define with the inner annular body confined spaces which taper in wedgeshaped configuration circumferentially and which accommodate rolling bodies pressed towards the narrower end of the respective space by circumferentially extending springs which abut against axial projections of an annular disc maintained immovably between the two annular bodies.
  • the prior art provides for the annular disc to be made of sheet steel and to be maintained in engagement with the outer annular body by having its outer circumference configurated so as to mate with the cam tracks in the inner circumference of the outer annular body.
  • the axial projections against which the pressure springs abut, are stamped out of the plane of the annular disc and bent at right angles to the same.
  • the pressure springs have a rectangular cross section and are each guided in a sleeve of U-shaped configuration whose open side through which the respective spring is insertedabuts against the annular disc.
  • the sleeves and rolling bodies are held against axial displacement within the outer annular body by two semi-circular profiles which close the open side of the outer annular body.
  • a concomitant object of the invention is to provide such an improved starter drive which is capable of utilizing conventional circular-cross section pressure springs and has a minimum number of components.
  • a starter drive for combustion engines which, briefly stated, comprises a pinion, a drivetransmitting hollow shaft, an outer annular element concentric to and having a flange connected with said shaft, and an inner annular element surrounded by the outer element and connected with the pinion.
  • a plurality of curved cam tracks is provided on the inner circumference of the outer element angularly offset about and eccentric to the axis of the same, and which defines with the inner body confined spaces converging in circumferential direction.
  • An annular disc is stationarily received between the elements and provided with a plurality of axial projections each having a surface elongated in circumferential direction and rolling bodies are accommodated in the confined spaces.
  • Pressure springs are also accommodated in the respective confined spaces abutting and guided by the aforementioned surfaces, and also abutting against the rolling bodies, urging the latter circumferentially in the direction of convergence of the aforementioned spaces.
  • FIG. 1 is a side view, partially sectioned, illustrating an embodiment of the invention
  • FIG. 2 is a section taken on line [1-11 of FIG. 1;
  • FIG. 3 is a view on an enlarged scale, showing a detail of FIG. 1;
  • FIG. 4 is a section taken on line IV-IV of FIG. 3.
  • the exemplary drive illustrated in the embodiment in FIGS. 1-4 comprises a pinion 10 which, after the drive is assembled, will be tumably and axially shiftably mounted on the shaft of a non-illustrated starter drive motor.
  • the motor itself forms no part of the present invention, and is therefore not shown. In any case, such motors are conventional.
  • the pinion 10 has a cylindrical shaft 11 constituting the inner annular body of an overrunning coupling 12.
  • the shaft of the non-illustrated starter drive motor is provided with a steep-pitch external thread on one of its sections, and a follower, identified with reference numeral 14 and being of one piece constituted of sleeve 14a, flange 14b, and annular body 140, is provided with a corresponding internal thread 13 which meshes with the steep-pitch thread so that the follower 14 can become threadingly displaced longitudinally of the shaft.
  • the annular body constitutes the outer annular element of the overrunning coupling 12, and a two-part sleeve 15 is provided on the sleeve 14a.
  • a non-illustrated lever of a non-illustrated energizing relay engages the sleeve 15, and-it is pointed out that the lever and the relay are not illustrated because they are conventional and do not in themselves form a part-of the present invention, nor are they needed for an understanding of the invention.
  • a spring 16 abuts against the sleeve 15 and the flange 14b.
  • the annular body 140 surrounds the shaft 11 of the pinion and is provided on its inner circumference with a plurality of curved cam tracks 17 which are shown in FIG. 2, and which extend eccentrically to the axis of the coupling and are equi-angularly offset in circumferential direction.
  • Rollers 18 and pressure springs 19 are interposed between the annular body 14c and the shaft 11 of the pinion, in such a manner that each of the circumferential extending pressure springs 19 presses the associated roller 18 into the narrow portion of the confined circumferentially tapering space defined between the respective eccentric cam tracks 17 and the outer surface of the shaft 1 l.
  • a two-part disc 20 closes the opening of the body 14c and thereby retains the rollers 18 and the pinion in the element 14 against axial displacement.
  • a retaining ring or washer 21 in turn prevents the disc from axial displacement.
  • a plurality of axial projections 28 is provided which extend axially into the open side of the element 14 and against which the pressure springs 19 abut.
  • the projections 28 are provided on an axial end face of an annular member 29 equi-angularly spaced with reference to one another and which annular element 29 is accommodated in the interior of the member 14 as shown particularly in FIG. 1. It abuts, as shown in'the drawing, against the flange 14b, as FIG. 3 shows most clearly, its outer circumference is configurated matingly with and in correspondence with the cam tracks 17 on the inner surface of the annular body 140.
  • the projections 28 of the annular disc 29 (compare FIG. 4) abut against the disc 20 so that the annular element 29 is held in position without play.
  • the construction according to the present invention makes it possible to utilize pressure springs 19 which have a circular cross section and can also be produced simply and in conventional manner, as opposed to pressure springs having a rectangular cross section required in the prior art, and which are substantially more expensive.
  • the pressure springs 19 engage the rollers 18 approximately centrally and are guided laterally by surfaces 30 from the base of the respective projections 28 on the annular element 29, as shown in FIG. 4.
  • the outer diameter of the element 29 is slightly greater than the inner diameter of the annular body 140 so that when the element 29 is pressed into the interior of the body 140 until it abuts against the flange 14b, it will be frictionally retained and received concentrically within said outer annular element 14c in tightly-fitted relationship therewith.
  • the very small amount of excess material resulting from the slightly greater diameter of the element 29 versus the inner diameter of the element 140 is peeled off by the edge at the open side of the element 14c so that the element 29 is seated reliably and firmly.
  • a starter drive for combustion engines comprising a pinion; a drive-transmitting shaft; an outer annular element concentric to and having a flange connected with said shaft; an inner annular element surrounded by said outer element and connected with said pinion; a plurality of cam track portions on the inner circumference of said outer element angularly offset about and eccentric to the axis of the same, and defining with said inner element confined spaces converging in circumferential direction; an annular disk positioned between said elements and rigidly connected with said outer element and provided with a plurality of axial projections each having a surface elongated in axial direction; rolling bodies accommodated in said confined spaces; and pressure springs also accommodated in the respective confined spaces abutting and guided by said surfaces, and also abutting against said rolling bodies and urging the latter circumferentially in the direction of convergence of said spaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Mechanical Operated Clutches (AREA)
US103134A 1970-01-19 1970-12-31 Starter drive for combustion engines Expired - Lifetime US3691854A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702002074 DE2002074A1 (de) 1970-01-19 1970-01-19 Ritzelgetriebe fuer Anlasser von Brennkraftmaschinen

Publications (1)

Publication Number Publication Date
US3691854A true US3691854A (en) 1972-09-19

Family

ID=5759897

Family Applications (1)

Application Number Title Priority Date Filing Date
US103134A Expired - Lifetime US3691854A (en) 1970-01-19 1970-12-31 Starter drive for combustion engines

Country Status (5)

Country Link
US (1) US3691854A (de)
DE (1) DE2002074A1 (de)
FR (1) FR2075657A7 (de)
GB (1) GB1263040A (de)
PL (1) PL81467B1 (de)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760914A (en) * 1971-04-01 1973-09-25 Borg Warner Stieber Gmbh Roller type freewheel clutch
US3800925A (en) * 1971-11-25 1974-04-02 Bosch Gmbh Robert Overrunning roller bearing coupling for engine starter
US3954161A (en) * 1973-08-28 1976-05-04 Daimler-Benz Aktiengesellschaft Free-wheeling arrangement, especially for the guide wheel of hydrodynamic torque converters
US3955659A (en) * 1973-08-28 1976-05-11 Daimler-Benz Aktiengesellschaft Clamping roller free-wheeling device especially for the guide wheels of hydrodynamic torque converters
DE2930885A1 (de) * 1978-08-01 1980-02-14 Paris & Du Rhone Antrieb fuer einen anlasser fuer verbrennungsmaschinen
FR2625265A1 (fr) * 1987-12-28 1989-06-30 Mitsuba Electric Mfg Co Embrayage rotatif unidirectionnel pour demarreur
US5117954A (en) * 1990-08-03 1992-06-02 Koyo Seiko Co., Ltd. Overrunning clutch
US5265706A (en) * 1992-01-24 1993-11-30 Koyo Seiko Co., Ltd. Overrunning clutch system
US5318160A (en) * 1991-12-19 1994-06-07 Nippondenso Co., Ltd. Overrunning clutch
US5482150A (en) * 1992-03-31 1996-01-09 Ina Walzlager Schaeffler Kg Bushed overrunning clutches
US20040112701A1 (en) * 2002-12-11 2004-06-17 Ntn Corporation Integrated starter-generator roller clutch
US20090173179A1 (en) * 2008-01-05 2009-07-09 Cymbal William D Adjustable steering column assembly with compressive locking mechanism
US20090308198A1 (en) * 2008-06-17 2009-12-17 Martin Jastrzembowski Starter System with Integral Clutch Pinion for Start-Stop Engine Cranking
US20100082218A1 (en) * 2008-09-29 2010-04-01 John Andrew Layer Starter drive assembly and method of starting an engine
US20100077769A1 (en) * 2008-09-29 2010-04-01 John Andrew Layer Starter drive assembly and method of starting a gas turbine engine
CN103696892A (zh) * 2012-09-27 2014-04-02 罗伯特·博世有限公司 起动装置和用于装配和/或制造起动装置的方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3040074A1 (de) * 1980-10-24 1982-06-03 Robert Bosch Gmbh, 7000 Stuttgart Rollenfreilauf fuer andrehvorrichtungen von brennkraftmaschinen
IT1140291B (it) * 1981-11-24 1986-09-24 Magneti Marelli Spa Dispositivo d'innesto a ruota libera di motore elettrico di avviamento di motore a combustione interna,particolarmente di autoveicoli
DE102009001738A1 (de) * 2009-03-23 2010-09-30 Robert Bosch Gmbh Freilauf für einen Starter von einer Brennkraftmaschine, Starter und Herstellungsverfahren

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3760914A (en) * 1971-04-01 1973-09-25 Borg Warner Stieber Gmbh Roller type freewheel clutch
US3800925A (en) * 1971-11-25 1974-04-02 Bosch Gmbh Robert Overrunning roller bearing coupling for engine starter
US3954161A (en) * 1973-08-28 1976-05-04 Daimler-Benz Aktiengesellschaft Free-wheeling arrangement, especially for the guide wheel of hydrodynamic torque converters
US3955659A (en) * 1973-08-28 1976-05-11 Daimler-Benz Aktiengesellschaft Clamping roller free-wheeling device especially for the guide wheels of hydrodynamic torque converters
DE2930885A1 (de) * 1978-08-01 1980-02-14 Paris & Du Rhone Antrieb fuer einen anlasser fuer verbrennungsmaschinen
FR2625265A1 (fr) * 1987-12-28 1989-06-30 Mitsuba Electric Mfg Co Embrayage rotatif unidirectionnel pour demarreur
US4895234A (en) * 1987-12-28 1990-01-23 Mitsuba Electric Mfg. Co., Ltd. Unidirectional rotary clutch in starter motor
US5117954A (en) * 1990-08-03 1992-06-02 Koyo Seiko Co., Ltd. Overrunning clutch
US5318160A (en) * 1991-12-19 1994-06-07 Nippondenso Co., Ltd. Overrunning clutch
US5265706A (en) * 1992-01-24 1993-11-30 Koyo Seiko Co., Ltd. Overrunning clutch system
US5482150A (en) * 1992-03-31 1996-01-09 Ina Walzlager Schaeffler Kg Bushed overrunning clutches
US20040112701A1 (en) * 2002-12-11 2004-06-17 Ntn Corporation Integrated starter-generator roller clutch
US6834750B2 (en) * 2002-12-11 2004-12-28 Ntn Corporation Integrated starter-generator roller clutch
US20090173179A1 (en) * 2008-01-05 2009-07-09 Cymbal William D Adjustable steering column assembly with compressive locking mechanism
US20090308198A1 (en) * 2008-06-17 2009-12-17 Martin Jastrzembowski Starter System with Integral Clutch Pinion for Start-Stop Engine Cranking
US20100082218A1 (en) * 2008-09-29 2010-04-01 John Andrew Layer Starter drive assembly and method of starting an engine
US20100077769A1 (en) * 2008-09-29 2010-04-01 John Andrew Layer Starter drive assembly and method of starting a gas turbine engine
US8014934B2 (en) 2008-09-29 2011-09-06 General Electric Company Starter drive assembly and method of starting an engine
CN103696892A (zh) * 2012-09-27 2014-04-02 罗伯特·博世有限公司 起动装置和用于装配和/或制造起动装置的方法

Also Published As

Publication number Publication date
GB1263040A (en) 1972-02-09
FR2075657A7 (de) 1971-10-08
DE2002074A1 (de) 1971-07-29
PL81467B1 (de) 1975-08-30

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