US3293924A - Turning gear for internal combustion engines - Google Patents

Turning gear for internal combustion engines Download PDF

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US3293924A
US3293924A US440840A US44084065A US3293924A US 3293924 A US3293924 A US 3293924A US 440840 A US440840 A US 440840A US 44084065 A US44084065 A US 44084065A US 3293924 A US3293924 A US 3293924A
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disc
fork
internal combustion
sleeve
turning gear
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Expired - Lifetime
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US440840A
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Costelli Giuseppe
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Fiat SpA
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Fiat SpA
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    • 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
    • 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
    • F02N15/067—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 the starter comprising an electro-magnetically actuated lever
    • 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

  • This invention relates to a device for effecting axial shifting of the driving .pinion unit in an engine starter drive, of the type comprising a fork acting on a shifting member mounted for rotation and axial displacement against the action of a spring on a helically splined sleeve which fits on a helically splined end of the shaft of the engine starter and is coupled through an overrunning clutch or a free wheel with the pinion arranged to engage the gear on the flywheel of the internal combustion engine.
  • the object of this invention is to provide a shifting member for turning gears of the type referred to above, wherein said member is of simple construction and comprises punch-ed components only, which do not require any further machining and can be easily assembled.
  • this invention provides a turning gear for effecting axial displacement of the driving pinion unit for engine starter drives of the type referred to above, wherein the shifting member interposed between the actuating fork and sleeve slidably splined to the end of the engine starter shaft, comprise two sheet metal discs slidably and rotatably mounted on the sleeve, said discs being interconnected by means of tabs and notches, so as to define therebetween an annular groove in which a third disc is loosely mounted, the latter disc being acted upon by the limbs of the actuating fork, the fork cooperating with said third disc to keep it against rotation.
  • FIGURE 2 is an axial view thereof
  • FIGURE 3 is a part sectional view on line III-III of FIGURE 2,
  • FIGURE 4 is an exploded perspective view of the shifting member
  • FIGURE 5 is an axial sectional view of another embodiment of the shifting member
  • FIGURE 6 is an axial view of a further modification of FIGURE 2,
  • FIGURE 7 is a cross sectional view on line VII-VII of FIGURE 6, and
  • FIGURE 8 is a part sectional view on line VIII-VIII of FIGURE 6.
  • a fork 7 fast with a control lever is pivoted on a pivot 8 and operated in a known manner by an electromagnet or a pull rod, not shown.
  • the fork 7 acts on a shifting member generally denoted by II, mounted for rotation and axial displacement against the action of a spring 5 on a helically splined sleeve 6 mounted on an end of the shaft 12 provided with corresponding splines 14 of the starting motor and coupled through a free wheel with a pinion 9 arranged to engage the gear on the flywheel (not shown) of the internal combustion engine.
  • a shifting member generally denoted by II, mounted for rotation and axial displacement against the action of a spring 5 on a helically splined sleeve 6 mounted on an end of the shaft 12 provided with corresponding splines 14 of the starting motor and coupled through a free wheel with a pinion 9 arranged to engage the gear on the flywheel (not shown) of the internal combustion engine.
  • the shifting member 11 is actuated by the fork 7, and comprises a punched sheet metal disc 2 rotatably mounted Patented Dec. 27, 1966 in a circular groove formed by two further punched sheet metal discs 1, 3 coupled together.
  • the disc 2 is in the form of a circular ring provided with two radial fingers 2a protruding from the outer edge at diametrically opposite positions, engaged in corresponding slots 7b formed in two limbs 7a of the actuating fork 7 so that the disc 2 cannot rotate during operation of the engine starter and disengage from the fork 7.
  • the member on which the disc 2 is mounted comprises a circular ring 1 formed with four circumferential radial notches 1a, and a disc 3 formed with a pressed boss so as to present two concentrical circular rings 3a, 30 arranged on planes extending parallel with each other, spaced by a cylindrical section 3d integral therewith.
  • the disc 3 is provided with four axial rectangular tabs 3b punched and bent from the inner edge of the smaller circular ring 30.
  • the disc 2 On assembly the disc 2 is fitted on the cylindrical section 3d of the disc 3, whereupon the disc 1 is coupled with the disc 3 and secured to the latter by inserting the tabs 3b into the notches 10 and bending them over.
  • the two discs 1 and 3 are thereby spaced by the cylindrical section 3d so that they leave an annular groove therebetween in which the disc 2 is rot-atably mounted.
  • the shifting member 11 is mounted on the sleeve 6 and the fingers 2a are fitted into the slots 7b of the fork 7.
  • the member 11 is prevented from slipping off the sleeve 6 by a stop member 4 comprising a resilient retaining ring of circular or rectangular cross-section engaged by an annular groove in the sleeve.
  • FIGURE 5 shows a modification wherein both discs 1 and 3 are provided with cylindrical bosses 1b, 3d, respectively, and radial coupling f-aces 1c, 30, respectively.
  • the discs are interconnected, similarly to the previously described construction, by means of tabs .and notches provided in the faces 10, 3c.
  • FIGURES 6, 7 and 8 show a further modification in which the disc 2 is deprived of radial fingers indicated by 2a in FIGURE 4.
  • the fork 7 is now provided at the end of its limbs 7a with ears 7c bent to U-shape to engage from opposite sides the circumferential edge of the disc 2.
  • the disc 2 is formed with a axial projection 13 on its circumference.
  • the components of the shifting member 11 can be surface hardened in order to reduce Wear from relative rotation.
  • the shifting member 11 is axially moved by the fork 7 and by compressing the spring 5 moves the pinion 9 into engagement with the teeth on the engine flywheel, not shown.
  • the engine starter is energized in a known manner, whereby the pinion 9, the free wheel 10, the sleeve 6, and the compression spring 5 rotate.
  • the discs 3 and 1 of the member 11 also rotate, while, the disc 2 is held against rotation either by the fingers 2a engaged in the slots 7b of the fork 7 (FIGS. 1 to 4) or by the projection 13 abutting against one of the cars 70 (FIGS. 6 and 8).
  • Turning gear for internal combustion engines for effecting axial displacement of the engine starter drive, of the type comprising a fork acting on a shifting member mounted for rotation and axial displacement against the action of a spring on a sleeve slidable by helical splining on the end of the engine starter shaft and coupled through a free wheel with the pinion engaging the engine gear on the flywheel of the internal combustion engine, wherein the shifting member interposed between the actuating fork and the sleeve comprises two sheet metal discs freely mounted on the sleeve and interconnected by tabs and notches to define therebetween an annular groove in which a third sheet metal disc is loosely mounted, and connecting means for connecting said third disc to the actuating fork.
  • said third disc is in the form of a fiat circular ring and said connecting means comprises two diametrically opposite radially extending fingers secured to the circumference of said ring and a slot formed in the end of each limb of said actuating fork into which said fingers project.
  • said connect ing means comprises said actuating fork formed with U-shaped radially directed projections on the limbs of the actuating fork adapted to embrace said third disc.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Operated Clutches (AREA)

Description

G. COSTELLI 3,293,924
TURNING GEAR FOR INTERNAL COMBUSTION ENGINES Dec. 27, 1966 2 Sheets-Sheet 1 Filed March 18, 1965 Dec. 27, 1966 G. COSTELLI 3,293,924
TURNING GEAR FOR INTERNAL COMBUSTION ENGINES Filed March 18, 1965 2 Sheets-Sheet 2 United States Patent 3,293,924 TURNING GEAR FOR INTERNAL COMBUSTION ENGINES Giuseppe Costelli, Turin, Italy, assignor t0 Fiat Societa per Azioni, Turin, Italy Filed Mar. 18, 1965, Ser. No. 440,840 Claims priority, application Italy, Mar. 24, 1964, 6,885/ 64 Claims. (Cl. 746) This invention relates to a device for effecting axial shifting of the driving .pinion unit in an engine starter drive, of the type comprising a fork acting on a shifting member mounted for rotation and axial displacement against the action of a spring on a helically splined sleeve which fits on a helically splined end of the shaft of the engine starter and is coupled through an overrunning clutch or a free wheel with the pinion arranged to engage the gear on the flywheel of the internal combustion engine.
The object of this invention is to provide a shifting member for turning gears of the type referred to above, wherein said member is of simple construction and comprises punch-ed components only, which do not require any further machining and can be easily assembled.
With the above and further objects in view, which will appear from the appended description this invention provides a turning gear for effecting axial displacement of the driving pinion unit for engine starter drives of the type referred to above, wherein the shifting member interposed between the actuating fork and sleeve slidably splined to the end of the engine starter shaft, comprise two sheet metal discs slidably and rotatably mounted on the sleeve, said discs being interconnected by means of tabs and notches, so as to define therebetween an annular groove in which a third disc is loosely mounted, the latter disc being acted upon by the limbs of the actuating fork, the fork cooperating with said third disc to keep it against rotation.
The invention shall be described in detail with reference to the accompanying drawings showing embodiments thereof, and wherein:
FIGURE 1 is a side elevational view of a turning gear according to this invention,
FIGURE 2 is an axial view thereof,
FIGURE 3 is a part sectional view on line III-III of FIGURE 2,
FIGURE 4 is an exploded perspective view of the shifting member,
FIGURE 5 is an axial sectional view of another embodiment of the shifting member,
FIGURE 6 is an axial view of a further modification of FIGURE 2,
FIGURE 7 is a cross sectional view on line VII-VII of FIGURE 6, and
FIGURE 8 is a part sectional view on line VIII-VIII of FIGURE 6.
In the embodiment shown in FIGURES 1 to 4 a fork 7 fast with a control lever, is pivoted on a pivot 8 and operated in a known manner by an electromagnet or a pull rod, not shown.
The fork 7 acts on a shifting member generally denoted by II, mounted for rotation and axial displacement against the action of a spring 5 on a helically splined sleeve 6 mounted on an end of the shaft 12 provided with corresponding splines 14 of the starting motor and coupled through a free wheel with a pinion 9 arranged to engage the gear on the flywheel (not shown) of the internal combustion engine.
The shifting member 11 is actuated by the fork 7, and comprises a punched sheet metal disc 2 rotatably mounted Patented Dec. 27, 1966 in a circular groove formed by two further punched sheet metal discs 1, 3 coupled together.
The disc 2 is in the form of a circular ring provided with two radial fingers 2a protruding from the outer edge at diametrically opposite positions, engaged in corresponding slots 7b formed in two limbs 7a of the actuating fork 7 so that the disc 2 cannot rotate during operation of the engine starter and disengage from the fork 7.
The member on which the disc 2 is mounted comprises a circular ring 1 formed with four circumferential radial notches 1a, and a disc 3 formed with a pressed boss so as to present two concentrical circular rings 3a, 30 arranged on planes extending parallel with each other, spaced by a cylindrical section 3d integral therewith. The disc 3 is provided with four axial rectangular tabs 3b punched and bent from the inner edge of the smaller circular ring 30.
On assembly the disc 2 is fitted on the cylindrical section 3d of the disc 3, whereupon the disc 1 is coupled with the disc 3 and secured to the latter by inserting the tabs 3b into the notches 10 and bending them over. The two discs 1 and 3 are thereby spaced by the cylindrical section 3d so that they leave an annular groove therebetween in which the disc 2 is rot-atably mounted.
The shifting member 11 is mounted on the sleeve 6 and the fingers 2a are fitted into the slots 7b of the fork 7.
The member 11 is prevented from slipping off the sleeve 6 by a stop member 4 comprising a resilient retaining ring of circular or rectangular cross-section engaged by an annular groove in the sleeve.
FIGURE 5 shows a modification wherein both discs 1 and 3 are provided with cylindrical bosses 1b, 3d, respectively, and radial coupling f- aces 1c, 30, respectively. The discs are interconnected, similarly to the previously described construction, by means of tabs .and notches provided in the faces 10, 3c.
FIGURES 6, 7 and 8 show a further modification in which the disc 2 is deprived of radial fingers indicated by 2a in FIGURE 4. The fork 7 is now provided at the end of its limbs 7a with ears 7c bent to U-shape to engage from opposite sides the circumferential edge of the disc 2. In order to prevent the rotation of the disc 2 when the starter operates and a consequent wear of cars 7c the disc 2 is formed with a axial projection 13 on its circumference. l
The components of the shifting member 11 can be surface hardened in order to reduce Wear from relative rotation.
In operation, the shifting member 11 is axially moved by the fork 7 and by compressing the spring 5 moves the pinion 9 into engagement with the teeth on the engine flywheel, not shown. Upon engagement the engine starter is energized in a known manner, whereby the pinion 9, the free wheel 10, the sleeve 6, and the compression spring 5 rotate. Due to the spring reaction, the discs 3 and 1 of the member 11 also rotate, while, the disc 2 is held against rotation either by the fingers 2a engaged in the slots 7b of the fork 7 (FIGS. 1 to 4) or by the projection 13 abutting against one of the cars 70 (FIGS. 6 and 8).
What I claim is:
1. Turning gear for internal combustion engines for effecting axial displacement of the engine starter drive, of the type comprising a fork acting on a shifting member mounted for rotation and axial displacement against the action of a spring on a sleeve slidable by helical splining on the end of the engine starter shaft and coupled through a free wheel with the pinion engaging the engine gear on the flywheel of the internal combustion engine, wherein the shifting member interposed between the actuating fork and the sleeve comprises two sheet metal discs freely mounted on the sleeve and interconnected by tabs and notches to define therebetween an annular groove in which a third sheet metal disc is loosely mounted, and connecting means for connecting said third disc to the actuating fork.
2. Turning gear as claimed in claim 1, wherein the two interconnected discs mounted on the sleeve are spaced by a cylindrical boss fast with one of the discs and forming the bottom of the annular groove.
3. Turning gear as claimed in claim 1 wherein said third disc is in the form of a fiat circular ring and said connecting means comprises two diametrically opposite radially extending fingers secured to the circumference of said ring and a slot formed in the end of each limb of said actuating fork into which said fingers project.
disc is in the form of a flat circular ring and said connect ing means comprises said actuating fork formed with U-shaped radially directed projections on the limbs of the actuating fork adapted to embrace said third disc.
5. Turning gear as claimed in claim 4 wherein said third disc is provided with an axially directed abutment on one face thereof adapted to cooperate with said projections to limit relative rotation between said third disc and said fork.
References Cited by the Examiner UNITED STATES PATENTS 3,182,515 5/1965 Klein 74-7 4. Turning gear as claimed in claim 1 wherein the third 15 MILTON KAUFMAN, Primary Examiner

Claims (1)

1. TURNING GEAR FOR INTERNAL COMBUSTION ENGINES FOR EFFECTING AXIAL DISPLACEMENT OF THE ENGINE STARTER DRIVE, OF THE TYPE COMPRISING A FORK ACTING ON A SHIFTING MEMBER MOUNTED FOR ROTATION AND AXIAL DISPLACEMENT AGAINST THE ACTION OF A SPRING ON A SLEEVE SLIDABLE BY HELICAL SPLINING ON THE END OF THE ENGINE STARTER SHAFT AND COUPLED THROUGH A FREE WHEEL WITH THE PINION ENGAGING THE ENGINE GEAR ON THE FLYWHEEL OF THE INTERNAL COMBUSTION ENGINE, WHEREIN THE SHIFTING MEMBER INTERPOSED BETWEEN THE ACTUATING FORK AND THE SLEEVE COMPRISES TWO SHEET METAL DISCS FREELY MOUNTED ON THE SLEEVE AND INTERCONNECTED BY TABS AND NOTCHES TO DEFINE THEREBETWEEN AN ANNULAR GROOVE IN WHICH A THIRD SHEET METAL DISC IS LOOSELY MOUNTED, AND CONNECTING MEANS FOR CONNECTING SAID THIRD DISC TO THE ACTUATING FORK.
US440840A 1964-03-24 1965-03-18 Turning gear for internal combustion engines Expired - Lifetime US3293924A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2019920A1 (en) * 1968-10-04 1970-07-10 Lucas Industries Ltd
US4305305A (en) * 1979-02-21 1981-12-15 Societe De Paris Et Du Rhone Actuators for electric starters
US5743140A (en) * 1996-06-07 1998-04-28 Gustafson; Keith A. Universal starter motor attachment angle adjustment
US6109575A (en) * 1998-06-29 2000-08-29 Litton Marine Systems Inc. Apparatus and method for mounting an instrument

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182515A (en) * 1961-06-29 1965-05-11 Bosch Gmbh Robert Starting-motor transmission for internal combustion engines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3182515A (en) * 1961-06-29 1965-05-11 Bosch Gmbh Robert Starting-motor transmission for internal combustion engines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2019920A1 (en) * 1968-10-04 1970-07-10 Lucas Industries Ltd
US4305305A (en) * 1979-02-21 1981-12-15 Societe De Paris Et Du Rhone Actuators for electric starters
US5743140A (en) * 1996-06-07 1998-04-28 Gustafson; Keith A. Universal starter motor attachment angle adjustment
US6109575A (en) * 1998-06-29 2000-08-29 Litton Marine Systems Inc. Apparatus and method for mounting an instrument

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