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WO2017118993A1 - Démarreur pour moteur à combustion interne à ressort conique - Google Patents

Démarreur pour moteur à combustion interne à ressort conique Download PDF

Info

Publication number
WO2017118993A1
WO2017118993A1 PCT/IN2016/050001 IN2016050001W WO2017118993A1 WO 2017118993 A1 WO2017118993 A1 WO 2017118993A1 IN 2016050001 W IN2016050001 W IN 2016050001W WO 2017118993 A1 WO2017118993 A1 WO 2017118993A1
Authority
WO
WIPO (PCT)
Prior art keywords
plunger
pinion
conical spring
spring
starter
Prior art date
Application number
PCT/IN2016/050001
Other languages
English (en)
Inventor
Muruganandam RADHAKRISHNAN
Thulsirajan GANESAN
Sathishkumar MANOHARAN
Sarankumar RAMAKRISHNAN
Original Assignee
Comstar Automotive Technologies Pvt Ltd
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 Comstar Automotive Technologies Pvt Ltd filed Critical Comstar Automotive Technologies Pvt Ltd
Priority to PCT/IN2016/050001 priority Critical patent/WO2017118993A1/fr
Publication of WO2017118993A1 publication Critical patent/WO2017118993A1/fr

Links

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
    • F02N15/062—Starter drives
    • F02N15/063—Starter drives with resilient shock absorbers
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • 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
    • 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
    • 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

  • the present invention generally relates to starters for a motor vehicle, and particularly relates to an improvement of spring arrangement in the starter motor.
  • a conventional starter for starting a vehicle engine is designed as shown in FIG. 1
  • the conventional starter device 1 as shown in FIG. 1, comprises: a DC motor 2; an over-running clutch 4 slidably mounted on the output rotary shaft 3 of the motor; an electromagnetic switch 6 provided beside the DC motor 2; and a shift lever 10 having one end engaged with a hook 8 coupled to the plunger 7 of the electromagnetic switch 6 and the other end engaged with the cylindrical rear end portion 9 of the over-running clutch 4 so as to slide the over-running clutch 4 on the output rotary shaft 3.
  • the electromagnetic switch 6 for operating the shift lever 10 has a cylindrical outer frame 11 which has a wall 1 1a at one end.
  • the aforementioned plunger 7 is inserted into the end wall 1 la.
  • a stationary iron core 12 is disposed at the other end of the outer frame 1 1 in such a manner as to confront with the plunger 7.
  • the iron core 12 has an end wall which is fixedly fitted in the rear end portion of the outer frame 1 1, thus forming a frame together with the outer frame 1 1.
  • a coil bobbin 13 is accommodated in the frame thus formed.
  • An exciting coil 14 is wound on the coil bobbin 13.
  • a return spring 15 is interposed between the iron core 12 and the plunger 7.
  • the iron core 12 has a central through-hole, into which a rod 16 is slidably inserted in such a manner that its one end portion (or front end portion) is extended from the iron core 12 towards the plunger 7.
  • the other end portion (or rear end portion) of the rod 16 supports a movable contact 17.
  • the starter further comprises: a carrier rod 18 for returning the rod to a predetermined position; a cap 19 made of resin; and a terminal bolt 20 embedded in the cap 19 so that its inner end serves as a stationary contact with which the movable contact 17 is brought into contact.
  • a magnet 25 connected at the base of the DC motor 2 and a brush box assembly 26 placed in the rear end of the starter motor as protecting device.
  • the plunger 7 is inserted into the central opening formed in the end wall 11a of the outer frame 11, and it is moved along the central axis of the coil bobbin 13 towards the iron core 12.
  • the plunger 7 has a recess which is opened axially outward.
  • the above-described connecting rod 8 is in the form of a piston and has a flange at the rear end.
  • the connecting rod 8 is slidably inserted into the recess of the plunger 7 and is extended outside passing through the central hole that is formed in a holder 21, which closes the open end of the recess of the plunger 7.
  • the outer end portion of the connecting rod 8 is engaged with the upper end of the shift lever 10.
  • a cylindrically coiled spring namely, a compression spring 22 is interposed between the holder 21 and the flange of connecting rod 8.
  • the present invention overcomes the shortcomings associated with the background art and achieves other advantages not realized by the background art.
  • the principal object of the present invention is to provide conical spring arrangement in starter motor to work on change of mind conditions viz., key start, early engagement and back crank engagement.
  • Another object of the present invention about conical spring arrangement in starter motor that is simply adaptable with the existing starter design without much modification therein.
  • an object of the invention is to provide a starter in which with a small electromagnetic switch, the plunger can be moved against a compression conical spring having a certain elastic force.
  • the present invention have been achieved by the provision of a starter in which a pinion, which is rotated by torque of an electric motor, is slid axially by the plunger of an electromagnetic switch, and is pushed against an engine ring gear by a compression spring before rotated; in which, according to the invention, said compression spring is a conically coiled spring.
  • an electromagnetic attracting unit in which a movable iron core confronted coaxially with a stationary iron core is moved towards the stationary iron core by electromagnetic force, which comprises: a conically coiled spring interposed between the stationary iron core and the movable iron core in such a manner that the spring is substantially coaxial with the stationary iron core and the movable iron core.
  • the conically coiled spring is deflected (compressed) beginning with its end larger in diameter, thus showing a spring characteristic similar to a plunger attracting force characteristic. Therefore, the force of attracting the plunger will never become in balance with the force of deflecting the conically coiled spring.
  • FIG. 1 is a sectional view showing a conventional starter motor.
  • FIG. 2 is a drive assembly of a conventional starter motor.
  • FIG. 3 is a characteristic diagram indicating wear performance of a conventional starter motor.
  • FIG. 4 is a sectional view showing conical spring arrangement in starter motor according to this invention.
  • FIG. 5 is a drive assembly in a starter motor with conical spring.
  • FIG. 6 is exploded view of drive assembly in a starter motor with conical spring.
  • FIG. 7 is a characteristic diagram indicating wear performance of a starter motor with conical spring.
  • FIG. 2 the drive assembly of a conventional starter motor wherein the pinion (1) attached with the drive cup (2) which is intend supported with drive barrel (3). Because of this arrangement with in few cycles the pinion starts wearing off as well as the flange and tooth. This wearing effect, affects the performance and the life span of the starter motor.
  • the characteristic diagram indicating wear performance of a conventional starter motor is shown in FIG.3 wherein the line Rl refers to the ring gear wear which initially starts from zero and moving gradually to the peak within few cycles and also the PI which refers to the pinion wear also reacting the same way as the ring gear wear. In this conventional method of starter won't support the change of mind conditions such as key start, early engagement and back crank engagement.
  • the conical spring arrangement in starter device comprises: a DC motor; a conical spring 104 slidably mounted on the output rotary shaft of the motor; an electromagnetic switch 6 provided beside the DC motor; and a shift lever 10 having one end engaged with a hook 8 coupled to the plunger 7 of the electromagnetic switch 6 and the other end engaged with the cylindrical rear end portion 9 of the conical spring 104 so as to slide the conical spring on the output rotary shaft.
  • the electromagnetic switch 6 for operating the shift lever 10 has a cylindrical outer frame 11 which has a wall 11a at one end.
  • the aforementioned plunger 7 is inserted into the end wall 1 la.
  • a stationary iron core 12 is disposed at the other end of the outer frame 1 1 in such a manner as to confront with the plunger 7.
  • the iron core 12 has an end wall which is fixedly fitted in the rear end portion of the outer frame 1 1, thus forming a frame together with the outer frame 1 1.
  • a coil bobbin 13 is accommodated in the frame thus formed.
  • An exciting coil 14 is wound on the coil bobbin 13.
  • a return spring 15 is interposed between the iron core 12 and the plunger 7.
  • the iron core 12 has a central through-hole, into which a rod 16 is slidably inserted in such a manner that its one end portion (or front end portion) is extended from the iron core 12 towards the plunger 7.
  • the other end portion (or rear end portion) of the rod 16 supports a movable contact 17.
  • the starter further comprises: a carrier rod 18 for returning the rod to a predetermined position; a cap 19 made of resin; and a terminal bolt 20 embedded in the cap 19 so that its inner end serves as a stationary contact with which the movable contact 17 is brought into contact.
  • the plunger 7 is inserted into the central opening formed in the end wall 11a of the outer frame 11, and it is moved along the central axis of the coil bobbin 13 towards the iron core 12.
  • the plunger 7 has a recess which is opened axially outward.
  • the above-described connecting rod 8 is in the form of a piston and has a flange at the rear end.
  • the connecting rod 8 is slidably inserted into the recess of the plunger 7 and is extended outside passing through the central hole that is formed in a holder 21, which closes the open end of the recess of the plunger 7.
  • the outer end portion of the connecting rod 8 is engaged with the upper end of the shift lever 10.
  • a cylindrically coiled spring namely, a compression spring 22 is interposed between the holder 21 and the flange of connecting rod 8.
  • the movable contact 17 is brought into contact with the stationary contact, so that the DC motor is energized.
  • the pinion 103 is rotated, it is engaged with the engine ring gear by the elastic force of the compression spring 22.
  • FIG. 5 a drive assembly section of a starter motor with conical spring arrangement.
  • a drive cup 7 shielding the whole drive assembly there is a carrier rod 1 placed at centre of the drive assembly which connects the whole set up and retainer cup 2 placed on the carrier rod for tightening the set up.
  • a pinion 3 were placed which engaged with the other side of the starter assembly.
  • conical spring 4 placed in between the pinion and the spring retainer cup 5.
  • Drive barrel 5 placed alongside of the drive cup for the further protection of the assembly.
  • FIG. 6 exploded view of drive assembly in a starter motor with conical spring 4.
  • This arrangement clearly explains about conical spring arrangement in a detailed manner, wherein drive barrel 6 internally connected with carrier rod and the spring retainer cup 5 also placed on the carrier rod.
  • the retainer cup 2 arranged as permanent seal above side of the entire setup and fixed with a jump ring 8 which won't allow any of the parts to move internally.
  • the conical spring 4 is placed between the spring retainer cup 5 and the pinion 3 and take the entire pressure from either side and release the same gradually which protect the entire set up from damage and also increase the number of cycles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

L'invention concerne un moteur de démarreur qui est amené à tourner par le couple d'un moteur électrique, qui est amené à coulisser de façon axiale par le plongeur d'un commutateur électromagnétique et qui est poussé contre la couronne dentée du moteur par un ressort conique, ce qui permet l'emploi d'un petit commutateur électromagnétique. En outre, dans un commutateur électromagnétique dans lequel le plongeur, confronté de façon coaxiale au noyau en fer fixe portant de manière coulissante une tige avec un contact mobile, est déplacé vers le noyau de fer fixe par une force électromagnétique, un ressort conique est interposé entre le plongeur et le noyau en fer fixe, de telle sorte que le ressort est sensiblement coaxial au plongeur et au noyau en fer, de telle sorte que le jeu de la tige est évité.
PCT/IN2016/050001 2016-01-05 2016-01-05 Démarreur pour moteur à combustion interne à ressort conique WO2017118993A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IN2016/050001 WO2017118993A1 (fr) 2016-01-05 2016-01-05 Démarreur pour moteur à combustion interne à ressort conique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IN2016/050001 WO2017118993A1 (fr) 2016-01-05 2016-01-05 Démarreur pour moteur à combustion interne à ressort conique

Publications (1)

Publication Number Publication Date
WO2017118993A1 true WO2017118993A1 (fr) 2017-07-13

Family

ID=55629074

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2016/050001 WO2017118993A1 (fr) 2016-01-05 2016-01-05 Démarreur pour moteur à combustion interne à ressort conique

Country Status (1)

Country Link
WO (1) WO2017118993A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1650619A (en) * 1923-11-15 1927-11-29 Eclipse Machine Co Engine starter
GB1315688A (en) * 1969-11-22 1973-05-02 Nippon Denso Co Electrical starter for an internal combustion engine
US5126583A (en) * 1988-04-01 1992-06-30 Mitsubishi Denki K.K. Conical spring in a starter motor
WO2014167236A1 (fr) * 2013-04-08 2014-10-16 Valeo Equipements Electriques Moteur Ensemble porte-pignon perfectionne, lanceur, et demarreur pour vehicule automobile correspondants
DE102013221738A1 (de) * 2013-10-25 2015-04-30 Robert Bosch Gmbh Startereinrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1650619A (en) * 1923-11-15 1927-11-29 Eclipse Machine Co Engine starter
GB1315688A (en) * 1969-11-22 1973-05-02 Nippon Denso Co Electrical starter for an internal combustion engine
US5126583A (en) * 1988-04-01 1992-06-30 Mitsubishi Denki K.K. Conical spring in a starter motor
WO2014167236A1 (fr) * 2013-04-08 2014-10-16 Valeo Equipements Electriques Moteur Ensemble porte-pignon perfectionne, lanceur, et demarreur pour vehicule automobile correspondants
DE102013221738A1 (de) * 2013-10-25 2015-04-30 Robert Bosch Gmbh Startereinrichtung

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