EP1130253A2 - Démarreur muni d'un arbre flexible - Google Patents

Démarreur muni d'un arbre flexible Download PDF

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Publication number
EP1130253A2
EP1130253A2 EP01850042A EP01850042A EP1130253A2 EP 1130253 A2 EP1130253 A2 EP 1130253A2 EP 01850042 A EP01850042 A EP 01850042A EP 01850042 A EP01850042 A EP 01850042A EP 1130253 A2 EP1130253 A2 EP 1130253A2
Authority
EP
European Patent Office
Prior art keywords
starter
shaft
flexible shaft
flexible
engine
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Withdrawn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
EP01850042A
Other languages
German (de)
English (en)
Other versions
EP1130253A3 (fr
Inventor
Darrel R. Janisch
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.)
Arctic Cat Inc
Original Assignee
Arctic Cat Inc
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 Arctic Cat Inc filed Critical Arctic Cat Inc
Publication of EP1130253A2 publication Critical patent/EP1130253A2/fr
Publication of EP1130253A3 publication Critical patent/EP1130253A3/fr
Withdrawn legal-status Critical Current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
    • F02N15/006—Assembling or mounting of starting devices
    • 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
    • F02N11/00—Starting of engines by means of electric motors
    • 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

Definitions

  • the present invention relates to a flexible shaft starter. More particularly, the present invention relates to a flexible shaft starter apparatus, system and method for an internal combustion engine.
  • Conventional starters for internal combustion engines are generally mounted to the engine.
  • electric starter motors are generally mounted to the engine of a vehicle to be powered by the engine.
  • many failures of electric starter motors mounted to the engine can be traced to engine induced vibration.
  • mounting the starter motor directly to the engine limits how the engine may be positioned within a chassis of the vehicle. For example, it is desirable to have a low center of gravity for certain vehicles (e.g., recreational vehicles such as snowmobiles). How low the engine is situated within the vehicle chassis determines how low the center of gravity can be. Accordingly, mounting the starter motor to the engine impacts the vehicle's overall center of gravity since space must be made available to accommodate the starter motor.
  • the present invention relates generally to a flexible shaft starter.
  • the present invention relates to a flexible shaft starter for starting an internal combustion engine of a vehicle.
  • the starter motor is mounted remotely from the engine, which is a relatively high vibration area, and for example is mounted to the vehicle's chassis, which is a relatively low vibration area.
  • the engine assembly includes an internal combustion engine; a starter having an output shaft and being mounted to the chassis remotely from the engine; and a flexible shaft having a first and second end, the first end being driven by the output shaft of the starter and the second end driving at least one driven member of the engine.
  • Another aspect of the invention provides a flexible shaft starter system for an internal combustion engine of a vehicle (e.g., a recreational vehicle).
  • the internal combustion engine is mounted to a chassis of the recreational vehicle and has at least one driven member.
  • the flexible shaft starter system includes a starter having an output shaft and is mounted to the chassis remotely from the engine; and a flexible shaft having a first and second end, the first end being driven by the output shaft of the starter and the second end driving the at least one driven member of the engine.
  • Still another aspect of the invention provides a flexible shaft starter kit for an internal combustion engine of a recreational vehicle, the internal combustion engine being mounted to a chassis of the recreational vehicle and having at least one driven member.
  • the flexible shaft starter kit includes a starter having an output shaft and being adapted for mounting to the chassis of the recreational vehicle; and a flexible shaft having a first and second end, the first end being adapted to be driven by the output shaft of the starter and the second end being adapted to drive the at least one driven member.
  • the recreational vehicle includes an internal combustion engine mounted to a chassis of the recreational vehicle and having at least one driven member; a starter having an output shaft and being mounted to the chassis of the recreational vehicle remotely from the engine; and a flexible shaft having a first and second end, the first end being driven by the output shaft of the starter and the second end driving the at least one driven member.
  • Still another aspect of the invention provides a method of starting an internal combustion engine of a recreational vehicle, the internal combustion engine being mounted to a chassis of the recreational vehicle and having at least one driven member.
  • the internal combustion engine is in communication with a starter having an output shaft and being mounted to the chassis of the recreational vehicle remotely from the engine.
  • the output shaft of the starter is coupled to a flexible shaft having a first and second end, the first end being driven by the output shaft of the starter and the second end being adapted to drive the at least one driven member of the engine.
  • the method includes actuating the starter to rotate the output shaft; and transferring the rotation of the output shaft of the starter to the at least one driven member through the flexible shaft.
  • the present invention provides a starter that is mounted remotely with respect to an engine to be started, for example to a chassis of a vehicle.
  • the starter is provided with a flexible torsion shaft for transferring the rotation of an output shaft of the starter to a driven member of the engine. Mounting the starter to the chassis of the vehicle remotely from the engine reduces vibration related failures of the starter.
  • a flexible shaft starter system 2 is illustrated.
  • an electric starter motor 4 having an output shaft 11 is coupled to a flexible torsion shaft 6.
  • the flexible torsion shaft 6 has a first end 12 coupled to the output shaft 11 of the starter motor 4 and a second end 14 coupled to a pinion drive assembly 7.
  • the pinion drive assembly 7 includes a pinion gear 8.
  • the pinion drive assembly 7 is coupled to a driven member of an internal combustion engine.
  • the pinion gear 8 of the pinion drive assembly 7 is coupled to a starter gear 10 of a clutch at a power takeoff (PTO) end of the internal combustion engine.
  • PTO power takeoff
  • the pinion gear 8 of the pinion drive assembly 7 is coupled to a starter gear 10 of a fly wheel at a magneto end of the internal combustion engine.
  • the starter gear 10 may be bolted to the clutch or the fly wheel or may be made integral with the clutch or the fly wheel.
  • the electric starter motor 4 may be provided with openings 16 in order to mount the starter motor 4 to a chassis of a vehicle operated by the engine.
  • the flexible torsion shaft 6 rotates in a direction indicated by reference numeral 18.
  • the flexible torsion shaft 6 transfers the rotation of the output shaft 11 of the electric starter motor 4 to the pinion drive assembly 7, thereby causing the starter gear 10 to rotate in the direction indicated by reference numeral 20. Accordingly, the electric starter motor 4 is capable of starting the engine from a remote location through the flexible torsion shaft 6.
  • selecting a flexible shaft 6 for a given application depends on several variables.
  • the application may require a bi-directional or uni-directional flexible shaft 6.
  • the flexible shaft should be selected according to a maximum continuous torque required to be transmitted through the shaft 6 to the starter gear 10.
  • Other design variables of the flexible shaft 6 to consider include selecting the flex angle of the flexible shaft 6; the types of end fittings of the flexible shaft 6 (e.g., internal spline steel couplers, smooth bore, split roll-pin secured and the like). Casings are generally recommended when the length of the flexible shaft 6 exceeds about eight inches. The casing helps to protect the shaft from dirty, dusty or corrosive environments.
  • casings may be provided to prevent injury when the flexible shaft 6 is in use.
  • the casing helps to prevent helexing of the flexible torsion shaft. Helexing may occur, for example, when the flexible torsion shaft is rotated with small or no loads connected to a distal end of the shaft.
  • a casing is a design choice.
  • Flexible torsion shafts may be obtained, for example, from S.S. White Technologies.
  • a flexible torsion shaft to be used with the present invention is manufactured by S.S. White Technologies is a POWER-FLEX shaft model number #375AMX8.00FF.
  • the POWER-FLEX shaft may be obtained in various lengths (e.g., 8 inches) with a variety of end fittings (e.g., #F or #E fittings).
  • Fig. 2 illustrates an internal combustion engine assembly 24 including an electric starter motor 4 mounted remotely from the engine 24 to a chassis 26 of a vehicle to be powered by the engine 24.
  • the electric starter motor 4 is mounted to the chassis 26 through a bracket 28 using a suitable fastener 30 which is inserted through openings 16 of the electric starter motor 4.
  • the distal end of the shaft 6 is coupled to the pinion drive assembly 7.
  • the pinion drive assembly 7 is mounted to the engine 24 through a bracket 32.
  • the bracket 28 may be an integral part of the chassis.
  • the bracket 32 may be an integral part of the engine block or may be secured to the engine block by suitable fasteners.
  • fasteners are suitable for mounting the brackets 28 and 32 to the chassis and the engine, respectively, without departing form the spirit and scope of the invention.
  • the electric starter motor 4 is mounted to bracket 28 and secured to the vehicle chassis 26 remotely from the engine 24 in a low-vibration chassis region.
  • the pinion drive assembly 7 is mounted to the bracket 32 which is located in a high-vibration engine region.
  • the electric starter motor 4 is mounted to the chassis 26 away from the high-vibration region of the engine 24. Accordingly, the starter motor 4 does not experience vibration induced stress which can lead to engine vibration induced failures in the electric starter motor 4.
  • the flexible portion shaft 6 allows the starter motor 4 to be remotely located from the engine 24, the engine 24 may be situated in a lower position within the chassis 26 and thereby reduce the vehicle's overall center of gravity.
  • one embodiment of the invention provides an engine 24 having a starter motor 4 coupled to a chassis 26 through a bracket 28.
  • the starter motor 4 is attached to the bracket 28 by means of a suitable fastener 30.
  • a flexible shaft 6A is illustrated.
  • the flexible shaft 6A is not a continuous flexible shaft type, but rather is comprised of individual segments 34 which are coupled by flexible joints, e.g. universal joints, located on either end of the individual segments.
  • flexible shafts having different configurations may be utilized without departing from the spirit and scope of the invention.
  • the invention may be adapted to a recreational vehicle having an engine assembly 24 that includes an electric starter 4 mounted to a vehicle chassis 26 through a bracket 28.
  • the vehicle may be a recreational vehicle (e.g., a snowmobile).
  • a suitable flexible shaft starter for a snowmobile internal combustion engine may be selected as follows.
  • the starter motor should have a normal cranking speed of about 3500 RPM under normal loads and about 7500 RPM under no-load speeds.
  • the torque can be applied by the starter motor in a counterclockwise direction (although those skilled in the art will appreciate that this is a design choice).
  • the electric starter motor 4 should have a normal cranking torque of about 2.5 foot-pounds (ft-lbs) with stall torques of around 4.0 ft-lbs.
  • a flexible shaft 6 having a flexed angle of 45° with a bend radius of about 6 inches would be suitable for use. However, a 90° bend radius with a 6 inch production bend radius also may be utilized in this embodiment.
  • Fig. 4A where an exploded view of one embodiment of a starter system according to the present invention is illustrated.
  • the electric starter motor 4 is mounted to a chassis through the bracket 28 using suitable fasteners 30 which are inserted through openings provided in the electric starter motor 4.
  • the bracket 28 is mounted to the chassis by way of fasteners 36 and 42, for example fastener 36 may be a self tapping screw and fastener 42 may be a screw cap 42 which includes lock washer 40 and washer 38.
  • a retaining clip 44 may also be provided and attached to the bracket 28 with a fastener 46 (e.g., a self tapping screw).
  • the second end of the flexible torsion shaft 14 may be attached to the pinion drive assembly 7 by way of set-socket screw 48. Snap rings 50, thrust washers 52 and wave washer 54 are provided to position the drive pinion shaft 56 properly in bracket 32.
  • the pinion drive assembly 7 may be attached to the second end of the flexible torsion shaft 14 through a drive pinion shaft portion 56.
  • the pinion drive assembly 7 is attached to the engine bracket 32.
  • the starter gear 10 may be bolted to a clutch or a fly wheel portion of an engine by way of machine screw 58 or, as recited above, may be made integral with the clutch or the fly wheel.
  • the pinion drive assembly 7 is illustrated in exploded view in Figs. 4A-B.
  • the pinion drive assembly 7 comprises a drive pinion 62, which includes the pinion gear 8, and a pinion stopper assembly 60.

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)
EP01850042A 2000-03-01 2001-03-01 Démarreur muni d'un arbre flexible Withdrawn EP1130253A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51630000A 2000-03-01 2000-03-01
US516300 2000-03-01

Publications (2)

Publication Number Publication Date
EP1130253A2 true EP1130253A2 (fr) 2001-09-05
EP1130253A3 EP1130253A3 (fr) 2005-04-27

Family

ID=24054964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01850042A Withdrawn EP1130253A3 (fr) 2000-03-01 2001-03-01 Démarreur muni d'un arbre flexible

Country Status (2)

Country Link
EP (1) EP1130253A3 (fr)
CA (1) CA2336241A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012012670A1 (de) * 2012-06-23 2013-12-24 Daimler Ag Kraftfahrzeugantriebsstrangvorrichtung mit zumindest einer Startereinheit zum Starten eines Verbrennungsmotors
FR2999242A1 (fr) * 2012-12-11 2014-06-13 Motorisations Aeronautiques Demarreur ameliore pour moteur a piston permettant une attenuation du couple resistant.
CN112046669A (zh) * 2019-06-05 2020-12-08 邓晓光 一种用于电动自行车的平衡驱动系统

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US570051A (en) * 1896-10-27 Half to michael benedik
US643727A (en) * 1899-10-23 1900-02-20 Edward E Olson Clevis for agricultural implements.
US776977A (en) * 1904-05-23 1904-12-06 Charles Wicksteed Flexible shaft.
GB408306A (en) * 1932-09-30 1934-04-03 Joseph Harrison Thomson Robert Improvements in electric starters for motor-vehicle and other engines
GB776450A (en) * 1954-08-04 1957-06-05 Gen Electric Co Ltd Improvements in or relating to engine starting apparatus
US4362520A (en) * 1980-05-12 1982-12-07 Perry John C Flexible enclosed shaft
WO1998016752A1 (fr) * 1996-10-11 1998-04-23 J.C. Partners Arbre d'entrainement flexible

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012012670A1 (de) * 2012-06-23 2013-12-24 Daimler Ag Kraftfahrzeugantriebsstrangvorrichtung mit zumindest einer Startereinheit zum Starten eines Verbrennungsmotors
FR2999242A1 (fr) * 2012-12-11 2014-06-13 Motorisations Aeronautiques Demarreur ameliore pour moteur a piston permettant une attenuation du couple resistant.
WO2014091154A1 (fr) * 2012-12-11 2014-06-19 Societe De Motorisations Aeronautiques Démarreur amélioré pour moteur à piston permettant une atténuation du couple résistant
CN112046669A (zh) * 2019-06-05 2020-12-08 邓晓光 一种用于电动自行车的平衡驱动系统

Also Published As

Publication number Publication date
EP1130253A3 (fr) 2005-04-27
CA2336241A1 (fr) 2001-09-01

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