EP2290222B1 - Dispositif de démarrage pour un moteur à combustion interne - Google Patents

Dispositif de démarrage pour un moteur à combustion interne Download PDF

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Publication number
EP2290222B1
EP2290222B1 EP10173584.3A EP10173584A EP2290222B1 EP 2290222 B1 EP2290222 B1 EP 2290222B1 EP 10173584 A EP10173584 A EP 10173584A EP 2290222 B1 EP2290222 B1 EP 2290222B1
Authority
EP
European Patent Office
Prior art keywords
spring
starting device
combustion engine
wound
cable
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.)
Not-in-force
Application number
EP10173584.3A
Other languages
German (de)
English (en)
Other versions
EP2290222A3 (fr
EP2290222A2 (fr
Inventor
Mathias Wenckel
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.)
Makita Corp
Original Assignee
Makita Corp
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
Priority claimed from DE202009011429U external-priority patent/DE202009011429U1/de
Priority claimed from DE202009011430U external-priority patent/DE202009011430U1/de
Application filed by Makita Corp filed Critical Makita Corp
Publication of EP2290222A2 publication Critical patent/EP2290222A2/fr
Publication of EP2290222A3 publication Critical patent/EP2290222A3/fr
Application granted granted Critical
Publication of EP2290222B1 publication Critical patent/EP2290222B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02N3/00—Other muscle-operated starting apparatus
    • F02N3/02—Other muscle-operated starting apparatus having pull-cords
    • 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
    • F02N5/00—Starting apparatus having mechanical power storage
    • F02N5/02—Starting apparatus having mechanical power storage of spring type

Definitions

  • the invention relates to a starting device for at least one internal combustion engine, in particular cable start device for at least a two-stroke or four-stroke engine, with at least one rotatably mounted in a housing pulley or cable drum for generating a driving torque for a motor shaft by means of at least one Anwerfergriffs or pull handle on at least one force transmission means, in particular via a starter cable or traction cable, in rotation and at least one elastic coupling member with at least one driver member, in particular with at least one pawl, connected by means of which the drive torque is transferable to the motor shaft, the coupling member has two ends, wherein one end engages with the driver member and another end engages the sheave or drum.
  • Such a starting device is for example from the DE 203 01 182 U1 as well as the DE 203 19 902 U1 known.
  • the starting device as described in the two documents mentioned above, is housed in a housing in front of the internal combustion engine.
  • the internal combustion engine is cooled by means of the air passing through the starting device.
  • the ventilation elements of the housing such as ventilation slots, allow the entry of a cooling air flow in a fan arranged behind the starter for cooling the internal combustion engine. Frequently, however, in such devices, the cooling air flow is shielded from the housing to the engine by elements of the starting device, or the cooling air flow disturbed by the elements of the starting device.
  • the US 4,480,605 shows a starting device for an internal combustion engine, which is designed with a rotatably mounted in a housing sheave, which is set for generating a driving torque for a motor shaft by means of an access via a pull rope in rotation.
  • the coupling member is formed by a coil spring, but which is wound in a plane.
  • the US 2,772,669 shows a starting device for an internal combustion engine, but no elastic coupling member is provided in the form of a spring.
  • the EP 1 484 499 A2 shows a starting device for an internal combustion engine, wherein the coupling member is designed as a cylindrically wound coil spring.
  • the invention has for its object to achieve a better cooling of the internal combustion engine at a starting device of the type mentioned.
  • the coupling element is now designed as a wire-wound spring with decreasing cross-sectional areas whose tapered shape follows the inflowing cooling air flow of the ventilation elements of the housing.
  • cross-sectional area here is not the cross-sectional area of the spring wire, but the area enclosed by a spring coil surface.
  • a significantly improved cooling of the internal combustion engine downstream of the starter is achieved, since the cooling air inflow is improved in the fan arranged behind the starter and thus a good flow of a blade-carrying fan can be achieved.
  • the inventive design of the starter device combines the advantage of not acting cooling air flow with the advantage of being sufficiently dimensioned by the spring force for the application.
  • a spring having a uniform cross section of the largest cross section of the spring would be sufficient of the spring force in a starter system according to the invention, but would hinder the incoming cooling air flow and therefore lead to a poorer cooling of the internal combustion engine.
  • the spring is formed in a circular shape and thus as a truncated cone. Rather, all possible wound forms with tapered cut surfaces, such as truncated pyramids, Tetraederstümpfe, etc. conceivable. Likewise, a truncated cone shape with elliptical cross-sectional areas or a truncated pyramidal shape with polygonal cross-sectional areas would be conceivable.
  • the wound spring is a tapered coil spring.
  • Such coil springs are commercially available well and inexpensively.
  • the spring is also designed so that the spring has a progressive spring characteristic.
  • a progressive spring characteristic harmonizes very well with the flow of forces in the starting device.
  • the torque to be applied to the motor shaft during the starting process is subject to considerable fluctuations, since in the compression phase of the piston up to top dead center, a very high torque is to be applied, while in the expansion phase the applied torque decreases.
  • the ratio of diameter or longitudinal blade on a base surface and a top surface of the spring is 0.9 or less, preferably 0.8 to 0.6 and particularly preferably about 0.73.
  • the wire diameter of the spring is in the range of 2 to 4 mm and, according to a further preferred embodiment, 2.5 to 3.5 mm. According to A particularly preferred embodiment provides that the wire diameter is about 2.8 mm.
  • the wire of the spring could have all other conceivable cross-sectional shapes, such as a round, an oval, a square and / or a triangular cross-section.
  • a starting device 100 'as known in the art Such a starting device 100 'is, as well as in Fig. 2 and 3 illustrated starting device 100 for manually starting an internal combustion engine determines, for example, belongs to a motor chain saw.
  • the cable start device 100, 100 ' is accommodated in a housing 10, 10' which is suitable for both the embodiment according to the prior art (US Pat. Fig. 1 ) as well as shown Embodiment of the invention ( Fig. 2 and 3 ) is a removable with louvers 11,11 'provided cover of the motor housing, in which inter alia, an air guide 12 is integrated and an adjacent pole 13th From the inner wall of the housing 10,10' goes out a bearing pin 14 '(only in Fig.
  • the pulley or cable drum 17,17 ' has a rear pin 18 (see Fig. 2 ) which projects through a central bore of the spring housing 15,15 'in this and has an axial slot for the engagement of the inner end of the spiral-shaped starter spring 16,16'.
  • the pulley or cable drum 17,17 ' has a bearing pin 14' surrounding annular receiving space 20 ', which is limited to the starter spring 16/16' out of the end wall 21. Between this end wall 21 of the pulley or cable drum 17,17 'and a receiving space 24 of a ratchet member 25,25' is a coil spring 26,26 'arranged.
  • the outer that is, the end wall 21 of the pulley or cable drum 17,17 'facing the end of the coil spring 26,26' is mounted in a slot 27 ', which is provided in an annular shoulder of the end wall 21. This shoulder encloses the coil spring 26,26 ', the outer winding rests against the inner wall of the paragraph.
  • the Klinkenmit aloneglied 25,25 'facing the end of the coil spring 26,26' is mounted in the pawl Mit supportivemit flexibilityglied 25,25 '.
  • the coil spring 26 ' as in Fig.1 is shown according to the prior art, represents a cylindrical coil spring and thus is also the Klinkenmit instructionalglied 25 'formed accordingly.
  • Such a designed coil spring 26 leads to a significantly improved ventilation behavior of the internal combustion engine, since the inflow of the cooling air is improved by the starting device 100 in the arranged after the starting device air guide 12, since the conical spring 26 follows the incoming cooling air flow, and thus the cooling air flow leads positively ,
  • the coil spring 26 ' is dimensioned so that the Klinkenmit instructionalglied 25' with the speed of the pulley or cable drum 17 'is taken as long as the reaction torque of the motor shaft remains below a predetermined limit, wherein the piston of the engine in the areas in front of and behind the dead center. As the reaction torque increases beyond this limit, the coil spring 26 'deforms by contracting its turns, so that the rotational speed of the pawl driver member 25' decreases, while the pulley or cable drum 17 'can be further rotated at the same speed and with only moderately increasing force.
  • a coil spring 26 is now used, in which the diameter ratio of top surface to bottom surface is about 0.73. Furthermore, a wire was used for the coil spring with a diameter of about 2.8 mm.
  • the spring develops a progressive spring characteristic. It is therefore not, as described above, when a limit value is exceeded, the coil spring 26 is deformed directly, but it is possible first to let go the larger turns on block to then take advantage of a progression to use the smaller turns of the coil spring 26, so that too
  • the rotational speed of the pawl Mit supportivemit supportiveglieds 25 decreases, while the pulley or cable drum 17 can be further rotated at the same speed and with only moderately increasing force.
  • FIG. 4 is a section of a device according to the invention shown and that a bearing pin 14 on which a coil spring 26 is located.
  • the FIGS. 4a), 4b ) and 4c ) show various embodiments of the shape of the journal, resulting in different spring characteristics.
  • the in the Fig. 4a ) shown embodiment shows a conical spiral spring 26 which is arranged around a cylindrical bearing journal. Such an embodiment leads to a linear spring characteristic.
  • Fig. 4b shows a conical coil spring 26 which is disposed about a bearing pin 14, which is one of the coil spring 26th corresponding cone angle.
  • a conical coil spring 26 which is disposed about a bearing pin 14, which is one of the coil spring 26th corresponding cone angle.
  • the Fig. 4c shows a conical coil spring 26 which is disposed about a conical bearing pin 14 whose cone falls more than the cone of the coil spring 26 and thus has a progressive spring characteristic result.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Springs (AREA)
  • Transmission Devices (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Pulleys (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Claims (10)

  1. Dispositif de démarrage (100) pour un moteur à combustion interne, avec une poulie de renvoi (17) logée en étant rotative dans un boîtier (10), qui pour créer un couple d'entraînement pour un arbre moteur au moyen d'une poignée de traction peut être mise en rotation par l'intermédiaire d'un câble de traction et qui par l'intermédiaire d'un organe de couplage (26) élastique est reliée avec un organe d'entraînement (25) et au moyen de laquelle le couple d'entraînement est transmissible sur l'arbre moteur, l'organe de couplage (26) comportant deux extrémités, une extrémité étant en engagement avec l'organe d'entraînement (25) et une autre extrémité avec la poulie de renvoi (17),
    caractérisé en ce que l'organe de couplage (26) comporte un ressort (26) tridimensionnel enroulé en fil métallique, dont les surfaces de section transversale rétrécissent de l'extrémité faisant face à la poulie de renvoi (17) vers l'extrémité faisant face à l'organe d'entraînement(25).
  2. Dispositif de démarrage selon la revendication 1, caractérisé en ce que le ressort (26) enroulé présente une forme tronconique avec des surfaces de section transversale rondes et/ou elliptiques ou une forme pyramidale tronquée avec des surfaces de section transversale carrées ou polygonales.
  3. Dispositif de démarrage selon l'une quelconque des revendications précédentes, caractérisé en ce que le ressort (26) enroulé est un ressort en spirale qui se rétrécit.
  4. Dispositif de démarrage selon l'une quelconque des revendications précédentes, caractérisé en ce que le ressort (26) présente une ligne caractéristique progressive.
  5. Dispositif de démarrage selon l'une quelconque des revendications précédentes, caractérisé en ce que le rapport du diamètre sur une surface de base et une surface de recouvrement du ressort (26) enroulé est de 0,9 ou moins.
  6. Dispositif de démarrage selon l'une quelconque des revendications précédentes, caractérisé en ce que le rapport des diamètres se situe dans l'ordre de 0,8 à 0,6, de préférence d'environ 0,73.
  7. Dispositif de démarrage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un diamètre du fil métallique du ressort (26) se situe dans l'ordre de 2 à 4 mm, de préférence de 2,5 à 3,5 mm.
  8. Dispositif de démarrage selon la revendication 1, caractérisé en ce que le diamètre du fil métallique du ressort (26) est d'environ 2,8 mm.
  9. Dispositif de démarrage selon l'une quelconque des revendications précédentes, caractérisé en ce que le fil métallique du ressort (26) présente une section transversale ronde, ovale, carrée et/ou triangulaire.
  10. Dispositif de démarrage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'extension du ressort (26) de l'extrémité faisant face à la poulie de renvoi (17) vers l'extrémité faisant face à l'organe d'entraînement (25) se situe dans l'ordre inférieur à 10 mm, de manière préférée de 7,25 mm.
EP10173584.3A 2009-08-25 2010-08-20 Dispositif de démarrage pour un moteur à combustion interne Not-in-force EP2290222B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202009011429U DE202009011429U1 (de) 2009-08-25 2009-08-25 Startvorrichtung für Brennkraftmotor
DE202009011430U DE202009011430U1 (de) 2009-08-25 2009-08-25 Startvorrichtung für Brennkraftmotor

Publications (3)

Publication Number Publication Date
EP2290222A2 EP2290222A2 (fr) 2011-03-02
EP2290222A3 EP2290222A3 (fr) 2012-01-11
EP2290222B1 true EP2290222B1 (fr) 2014-11-12

Family

ID=43332290

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10173584.3A Not-in-force EP2290222B1 (fr) 2009-08-25 2010-08-20 Dispositif de démarrage pour un moteur à combustion interne
EP10173587.6A Not-in-force EP2299104B1 (fr) 2009-08-25 2010-08-20 Dispositif de démarrage pour un moteur à combustion interne

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP10173587.6A Not-in-force EP2299104B1 (fr) 2009-08-25 2010-08-20 Dispositif de démarrage pour un moteur à combustion interne

Country Status (3)

Country Link
US (2) US8215279B2 (fr)
EP (2) EP2290222B1 (fr)
CN (2) CN101994625B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2290222B1 (fr) * 2009-08-25 2014-11-12 Makita Corporation Dispositif de démarrage pour un moteur à combustion interne
DE202010016015U1 (de) * 2010-11-30 2012-03-01 Makita Corporation Startvorrichtung für einen Brennkraftmotor
DE102012002227A1 (de) * 2011-02-07 2012-08-09 Andreas Stihl Ag & Co. Kg "Handgeführtes Arbeitsgerät und Starteinrichtung für ein handgeführtes Arbeitsgerät"
DE202011000610U1 (de) * 2011-03-17 2012-06-18 Makita Corporation Startvorrichtung für mindestens eine Verbrennungskraftmaschine, insbesondere Seilzugstartvorrichtung
WO2014137261A1 (fr) * 2013-03-08 2014-09-12 Husqvarna Ab Enrouleur à cordon pour appareil de démarrage
DE102013009891A1 (de) * 2013-06-13 2014-12-18 Andreas Stihl Ag & Co. Kg Arbeitsgerät mit einem Verbrennungsmotor

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2772669A (en) * 1953-09-08 1956-12-04 Fairbanks Morse & Co Engine pull starter
US3779537A (en) * 1973-02-20 1973-12-18 Napoleon Spring Works Inc Cone apparatus
US4284161A (en) * 1978-11-24 1981-08-18 Kawasaki Motors Corp., U.S.A. Suspension system for snowmobiles
US4480605A (en) * 1983-05-09 1984-11-06 Brunswick Corporation Recoil starter
DE4135405C2 (de) 1991-10-26 2000-08-17 Stihl Maschf Andreas Startvorrichtung für Brennkraftmotoren
US6239393B1 (en) * 1997-03-26 2001-05-29 Kirk Acoustics A/S Contact device and a tool for handling it
JP3905689B2 (ja) * 2000-05-24 2007-04-18 株式会社共立 リコイルスタータ装置
US10135253B2 (en) 2000-12-29 2018-11-20 Abb Schweiz Ag System, method and computer program product for enhancing commercial value of electrical power produced from a renewable energy power production facility
JP2002327666A (ja) * 2001-03-01 2002-11-15 Starting Ind Co Ltd スタータ装置
JP4109838B2 (ja) * 2001-05-25 2008-07-02 スターテング工業株式会社 リコイルスタータ装置
JP2003148305A (ja) * 2001-11-16 2003-05-21 Starting Ind Co Ltd リコイルスタータ
ATE272804T1 (de) * 2002-01-25 2004-08-15 Brand Wilhelm Kg Federaufnahmekonus für ein federende einer spiralförmigen torsionsfeder
KR100962156B1 (ko) 2002-05-20 2010-06-10 스타팅 고교 가부시키가이샤 리코일 시동기
US6981482B2 (en) * 2002-08-29 2006-01-03 Starting Industrial Co., Ltd Recoil starter
JP4014998B2 (ja) * 2002-10-21 2007-11-28 スターテング工業株式会社 リコイルスタータ
DE20301182U1 (de) 2003-01-29 2004-06-09 Dolmar Gmbh Startvorrichtung für Brennkraftmotor
DE20319902U1 (de) 2003-01-29 2004-06-09 Dolmar Gmbh Startvorrichtung für Brennkraftmotor
JP2004360494A (ja) * 2003-06-02 2004-12-24 Starting Ind Co Ltd リコイルスタータ
US7191752B2 (en) * 2004-05-14 2007-03-20 Husqvarna Outdoor Products Inc. Energy storing starter assembly
JP4064961B2 (ja) 2004-10-06 2008-03-19 スターテング工業株式会社 リコイルスタータ
JP4523469B2 (ja) * 2005-03-29 2010-08-11 スターテング工業株式会社 リコイルスタータ
US7140341B2 (en) 2005-04-14 2006-11-28 Aktiebolaget Electrolux Energy storing starter assembly
DE102007008327B4 (de) * 2007-02-16 2016-06-23 Andreas Stihl Ag & Co. Kg Starteinrichtung für einen Verbrennungsmotor
DE102008007291B4 (de) * 2008-02-02 2016-12-22 Andreas Stihl Ag & Co. Kg Starteinrichtung für einen Verbrennungsmotor
US8132553B2 (en) * 2008-12-03 2012-03-13 Techtronic Outdoor Products Technology Limited Recoil starter system
EP2290222B1 (fr) * 2009-08-25 2014-11-12 Makita Corporation Dispositif de démarrage pour un moteur à combustion interne

Also Published As

Publication number Publication date
CN101994625A (zh) 2011-03-30
EP2290222A3 (fr) 2012-01-11
EP2299104B1 (fr) 2014-11-12
US20110048359A1 (en) 2011-03-03
US8215279B2 (en) 2012-07-10
CN101994624B (zh) 2015-07-01
US20110048360A1 (en) 2011-03-03
CN101994625B (zh) 2015-03-18
US8770167B2 (en) 2014-07-08
EP2299104A2 (fr) 2011-03-23
EP2290222A2 (fr) 2011-03-02
EP2299104A3 (fr) 2012-01-11
CN101994624A (zh) 2011-03-30

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