EP4310315A1 - Dispositif de démarreur et moteur à combustion interne doté de celui-ci - Google Patents

Dispositif de démarreur et moteur à combustion interne doté de celui-ci Download PDF

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Publication number
EP4310315A1
EP4310315A1 EP22186148.7A EP22186148A EP4310315A1 EP 4310315 A1 EP4310315 A1 EP 4310315A1 EP 22186148 A EP22186148 A EP 22186148A EP 4310315 A1 EP4310315 A1 EP 4310315A1
Authority
EP
European Patent Office
Prior art keywords
toothing
profile
teeth
internal
starter device
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.)
Pending
Application number
EP22186148.7A
Other languages
German (de)
English (en)
Inventor
Ambroz VRTOVEC
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.)
Mahle International GmbH
Original Assignee
Mahle International 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 Mahle International GmbH filed Critical Mahle International GmbH
Priority to EP22186148.7A priority Critical patent/EP4310315A1/fr
Publication of EP4310315A1 publication Critical patent/EP4310315A1/fr
Pending 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
    • F02N15/02—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
    • 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
    • F02N15/04—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

Definitions

  • the invention relates to a starter device according to the preamble of Claim 1.
  • the invention relates in particular to an internal combustion engine having such a starter device.
  • Starter devices of this type are known for example from US 9 062 646 B2 , CN 103244570 B or US 5 067 357 A .
  • a solenoid-operable lever mechanism is used in order to bring a pinion wheel of the starter device in an axial actuation movement out of a disengaged retracted position into engagement with a ring gear of an internal combustion engine.
  • the pinion wheel does not immediately mesh with the ring gear, which can be the case for example in a so-called tooth-on-tooth position, the pinion wheel has to be again retracted by way of the lever mechanism in order to be able to undertake a further engagement attempt.
  • the object of the invention therefore lies in providing an improved or at least another embodiment of a starter device.
  • a starter device In particular, an internal combustion engine having such a starter device is to be stated.
  • the basic idea of the invention lies in constructively adapting the internal toothings of the starter device so that burrs and/or regions with surface irregularities present on the same cannot, during the course of the actuation movement and of the operation of the starter device, come into contact with the internal toothings so that a jamming is excluded.
  • a starter device for cranking an internal combustion engine which is equipped with a driveshaft defining a longitudinal centre axis along its main extension, which in turn comprises an external toothing arranged in particular on an outer circumferential surface of the driveshaft.
  • the driveshaft is configured round-cylindrically and/or driveable round about the longitudinal centre axis by way of an electric starter motor of the starter device.
  • the starter device has a pinion shaft which practically defines a pinion shaft longitudinal centre axis along its main extension, which has a pot-like driveshaft receptacle, in which the driveshaft or at least a portion of the same is received.
  • the pinion shaft and the starter shaft are oriented coaxially to one another and/or mounted on one another so as to be rotationally and longitudinally adjustable by way of a suitable sliding bearing, which makes possible in particular a mounting free of coaxiality errors, which favours a safe operation of the starter device.
  • the starter device has a transmission device, which is equipped for transmitting a torque from the driveshaft to the pinion shaft.
  • the transmission device comprises an internal toothing arranged in particular on an inner circumferential surface of the transmission device, which can be meshed, i.e. brought into engagement with the said external toothing of the driveshaft.
  • the transmission device and the pinion shaft are longitudinally adjustable axially with respect to the longitudinal centre axis jointly within the scope of an actuation movement, with respect to the driveshaft, between an engaged position, in which the said internal toothing and the said external toothing positively engage into one another for the torque transmission, and a basic position axially spaced apart thereto, in which the internal toothing and the external toothing are disengaged.
  • the external toothing has teeth which comprise tip edges arranged in the region of a tooth tip of a tooth, which in the engaged position and in the actuation movement are spaced apart with respect to the teeth of the internal toothing and/or that the internal toothing has teeth which comprise tip edges arranged for example in the region of a tooth tip of a tooth, which tip edges are spaced apart in the engaged position and in the actuation movement with respect to the teeth of the external toothing. Because of this, the tip edges in the engaged position and in the actuation movement are thus contact-free with respect to the internal toothing or the external toothing.
  • the toothing profile of the external toothing or of the teeth of the external toothing is an involute profile and the toothing profile of the internal toothing or of the teeth of the internal toothing is one of the following profiles: a trapezoidal profile, a convex profile, a spline profile or a serration profile.
  • the term "involute profile” is to mean in particular a toothing profile in which a respective toothing comprises involute teeth or teeth that are configured involute at least in portions.
  • the term "trapezoidal profile” is to practically mean a toothing profile in which a respective toothing comprises teeth configured trapezoidal, i.e. such teeth which have a trapezoidal tooth cross-sectional profile.
  • the term "convex profile” is to mean a toothing profile in which a respective toothing comprises teeth with tooth flanks that are shaped in a convex manner or curved towards the outside.
  • the toothing profile of the external toothing or the teeth of the external toothing is realised by a trapezoidal profile, a convex profile, a spline profile or a serration profile and the toothing profile of the internal toothing or of the teeth of the internal toothing is realised by an involute profile.
  • the teeth of the external toothing and the teeth of the internal toothing each comprise tooth flanks, wherein merely the tooth flanks of the external toothing are configured so as to be involute and merely the tooth flanks of the internal toothing so as to be flat or convex. Practically, tip lands of these teeth are configured flat or curved. Because of this, an involute tooth flank in the said engaged position and/or during the course of the actuation movement is always in contact with a flat or convex tooth flank.
  • a tooth flank curved in an involute manner is to practically mean a tooth flank that is realised in the manner of an involute.
  • a tooth flank configured flat is to practically mean such a tooth flank which defines a plane and lies within the said plane. Practically, a flat tooth flank differs from this plane merely within the scope of production-related tolerances.
  • a convexly curved tooth flank is to practically mean a tooth flank curved away from the tooth body. According to an opposite solution, by way of which the same advantages can be achieved, it can be alternatively provided that the tooth flanks of the external toothing are configured flat or convex and the tooth flanks of the internal toothing are configured so as to be convex. During further tests it has been established that by way of these specific flank pairings or the proposed flank configurations a contact between burrs and/or surface irregularities present on the external toothing of the driveshaft can be prevented.
  • the tooth flanks are formed by tooth flank surfaces which extend between a said tip edge and a root surface or a root edge of a respective tooth.
  • the entire tooth surface of a tooth can be composed of two opposite tooth flanks, a tip land connecting the same to one another and root surfaces. Because of this, the tooth flank surfaces are curved in an involute manner or configured flat or convexly curved, as a result of which the subject flank configuration is limited to the tooth flank surfaces of the teeth.
  • the said tooth flank surfaces form contact surfaces.
  • the teeth of the external toothing can be planned to be contactable or contacted with the teeth of the internal toothing for transmitting the torque.
  • such tooth flank surfaces are to mean those surface regions of a tooth surface of a tooth of one of the said toothings which actually bring about the transmission of the torque between the toothings.
  • the subject flank configuration is limited to the actually effective tooth flank surfaces or contact surfaces.
  • the tooth flank surfaces or the contact surfaces can have an involute curvature, a flat configuration or a convex curvature.
  • the starter device comprises a pinion wheel that is non-rotatably arranged on the pinion shaft, which pinion wheel in the engaged position is in engagement with a ring gear of the internal combustion engine so that torque from the starter device to the internal combustion engine can be transmitted in order to crank the internal combustion engine.
  • the said transmission device besides the internal toothing, also has a clutch device, by way of which the transmission device can be frictionally connected to the pinion shaft.
  • the clutch device can be realised in the form of a freewheel clutch.
  • an internal combustion engine having a starter device equipped for cranking the internal combustion engine according to the preceding description and having a ring gear
  • the pinion shaft of the starter device is assigned a pinion wheel that is non-rotatable with respect to the pinion shaft, which pinion wheel is equipped in order to mesh with the ring gear in order to transmit torque from the starter device to the internal combustion engine.
  • the present invention practically relates to a starter device for cranking an internal combustion engine with a driveshaft comprising an external toothing with a pinion shaft comprising a driveshaft receptacle, in which the driveshaft is slidably received, having a transmission device equipped for transmitting a torque from the driveshaft to the pinion shaft, which transmission device comprises an internal toothing, wherein the transmission device and the pinion shaft, in an actuation movement jointly engage into one another are adjustable between an engaged position, in which the internal toothing and the external toothing engage into one another, and a disengaged basic position. It is substantial for the invention that the external toothing and the internal toothing have different toothing profiles.
  • the invention relates in particular to an internal combustion engine having such a starter device.
  • Fig. 1 and 2 show a preferred embodiment of a starter device marked in its entirety with the reference number 1 for cranking an internal combustion engine 2 which in Fig. 1 is merely symbolised by a ring gear 27 indicated in sections, which serves for transmitting a torque 29 provided by the starter device 1 into the internal combustion engine 2.
  • the starter device 1 has a round-cylindrical driveshaft 4, which in its main extension defines a longitudinal centre axis 3 and which can be driven by way of an electric starter motor 28 of the starter device 1 round about the longitudinal centre axis 3.
  • the driveshaft 4 is exemplarily embodied as solid round shaft and has a circumferential external toothing 5 arranged on a circumferential driveshaft lateral surface of the driveshaft 4 consisting of a multiplicity of teeth 12.
  • the external toothing 5 is embodied as helical toothing.
  • the teeth 12 of the external toothing 5 comprise curved tip lands 30 defining a tip circle of the external toothing 5 and curved root surfaces 32 defining a root circle of the external toothing 5.
  • the teeth 12 of the external toothing 5 furthermore comprise, viewed in a circumferential direction about the longitudinal centre axis 3, two opposite tooth flanks 13, which, emanating from a tip land 30 of a respective tooth 12 extend as far as to a root surface 32 of a respective tooth 12.
  • the tip lands 30 and the tooth flanks 13 are each separated by a tip edge 18 that is substantially parallel with respect to the longitudinal centre axis 3.
  • the tip edges 18 can be formed by pointed edges, tip curves or tip chamfers.
  • the root surfaces 32 and the tooth flanks 13 are each separated by a root edge 22 which is substantially parallel with respect to the longitudinal centre axis 3.
  • the root edges 22 can be formed by root curves, root chamfers or undercuts.
  • the starter device 1 has a round-cylindrical pinion shaft 6, which in its main extension defines a pinion shaft longitudinal centre axis 34 and which comprises a pot-like driveshaft receptacle 7, in which the driveshaft 4 is coaxially received.
  • the pinion shaft 6 is guided on the driveshaft 4 so as to be longitudinally adjustable with respect to the longitudinal centre axis 3 or the pinion shaft longitudinal centre axis 34.
  • the driveshaft 4 and the pinion shaft 6 have or form a suitable sliding bearing in the region of the driveshaft receptacle 7, which sliding bearing in particular makes possible a mounting free of coaxiality defects, so that the driveshaft 4 does not angularly tilt relative to the pinion shaft 6 by an unsymmetrical force loading during the course of an adjusting movement 10 still to be explained in the following and/or during the operation of the starter device 1.
  • the starter device 1 has a transmission device 8 arranged on the pinion shaft 6, which is equipped for transmitting the torque 29 from the driveshaft 4 to the pinion shaft 6.
  • the transmission device 8 for this purpose exemplarily comprises a friction clutch device 38 interacting with the pinion shaft 6 in a frictionally connected manner, by way of which the torque 29 can be transmitted from the transmission device 8, in particular frictionally, to the pinion shaft 6.
  • the friction clutch device 38 can be realised for example as a freewheel device.
  • the transmission device 8, furthermore, comprises an internal toothing 9 formed of a multiplicity of teeth 14 arranged on an inner circumferential surface of the transmission device 8, which internal toothing 9 can be brought into engagement with the said external toothing 5 of the driveshaft 4.
  • the teeth 14 of the internal toothing 9 comprise curved tip lands 31 defining a tip circle of the internal toothing 9 and curved root surfaces 33 defining a root circle of the internal toothing 9.
  • the teeth 14 of the internal toothing 9, furthermore, comprise, viewed in a circumferential direction about the longitudinal centre axis 3, two opposite tooth flanks 15 which, originating from a tip land 31 of a respective tooth 14 of the internal toothing 9 extend as far as to a root surface 33 of a respective tooth 14 of the internal toothing 9.
  • These tip lands 31 and these tooth flanks 15 are each separated by a tip edge 19 of the internal toothing 9 which, with respect to the longitudinal centre axis 3, is substantially parallel.
  • the tip edges 19 can be formed by pointed edges, tip curves or tip chamfers.
  • these root surfaces 33 and these tooth flanks 15 are each separated by a root edge 23 of the internal toothing 9, which with respect to the longitudinal centre axis 3 is substantially parallel.
  • the root edges 23 can be formed by root curves, root chamfers or undercuts.
  • the pinion shaft 6 of the starter device 1 is assigned a pinion wheel 26 at an axial end protruding over a housing of the starter device 1 facing away from the electric starter motor 28, which pinion wheel 26 is non-rotatably fixed on the pinion shaft 6.
  • the pinion wheel 26 is equipped in order to mesh with the said ring gear 27 of the internal combustion engine 2 in order to transmit the torque 29 from the starter device 1 to the internal combustion engine 2.
  • the transmission device 8 and the pinion shaft 6 are axially adjustable jointly for example by way of an actuating device 37 formed from a lever 35 and an electromagnetic actuation device 36 during the course of an actuation movement 10, which in Fig. 1 is indicated by a double arrow, with respect to the driveshaft 4 between an engaged position 11, in which the internal toothing 9 meshes with the external toothing 5, and a disengaged basic position spaced axially therefrom.
  • the torque 29 provided on the driveshaft 4 by the electric starter motor 28 is transmitted from the driveshaft 4 by way of the transmission device 8 to the pinion shaft 6, wherein the torque 29 by way of the pinion wheel 26 arranged on the pinion shaft 6 is transmitted to the ring gear 27 of the internal combustion engine 2.
  • the tip edges 18 of the teeth 12 of the external toothing 5 are configured so that these, in the engaged position 11 and in the adjusting movement 10, are spaced apart and free of contact with respect to the teeth 14 of the internal toothing 9, in particular with respect to the tooth flanks 15 of the teeth 14 of the internal toothing 9 or tooth flank surfaces 17 of the tooth flanks 15 of the teeth 14 of the internal toothing 9.
  • the external toothing 5 and the internal toothing 9 comprise in particular different toothing profiles 24, 25.
  • toothing profile 24 of the teeth 12 of the external toothing 5 an involute profile and as toothing profile 25 of the teeth 14 of the internal toothing 9 a trapezoidal profile is provided.
  • the external toothing 5 has curved in an involute manner tooth flanks 13, while the tooth flanks 15 of the internal toothing 9 are flat and configured angular with respect to the tip land 31.
  • the toothing profile 25 of the internal toothing 9 is embodied as an involute profile and that the toothing profile 24 of the external toothing 5 is realised as trapezoidal profile.
  • the tooth flanks 13 of the external toothing 5 are curved in an involute manner and tooth flanks 15 of the internal toothing 9 are convexly curved, as a result of which the described advantages are likewise achievable.
  • the internal toothing 9 comprises teeth 14 with tip edges 19 which in the engaged position 11 and in the actuation movement 10 are spaced apart with respect to the teeth 12 of the external toothing 5.
  • the said tooth flanks 13 of the external toothing 5 and the said tooth flanks 15 of the internal toothing 9 are formed by tooth flank surfaces 16, 17 which extend between a respective tip edge 18, 19 and a respectively root edge 22, 23 of a respective tooth 12, 14.
  • the said tooth flank surfaces 16, 17 form contact surfaces by way of which the teeth 12 of the external toothing 5 are actually contacted with the teeth 14 of the internal toothing 9 for transmitting the torque 29.
  • the proposed flank configuration is thereby restricted to the contact surfaces of the teeth 12, 14 of the two toothings 5, 9 actually involved in the torque transmission, so that an involute curvature, a flat configuration or a convex curvature is merely provided in these regions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
EP22186148.7A 2022-07-21 2022-07-21 Dispositif de démarreur et moteur à combustion interne doté de celui-ci Pending EP4310315A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22186148.7A EP4310315A1 (fr) 2022-07-21 2022-07-21 Dispositif de démarreur et moteur à combustion interne doté de celui-ci

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22186148.7A EP4310315A1 (fr) 2022-07-21 2022-07-21 Dispositif de démarreur et moteur à combustion interne doté de celui-ci

Publications (1)

Publication Number Publication Date
EP4310315A1 true EP4310315A1 (fr) 2024-01-24

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Family Applications (1)

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EP22186148.7A Pending EP4310315A1 (fr) 2022-07-21 2022-07-21 Dispositif de démarreur et moteur à combustion interne doté de celui-ci

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EP (1) EP4310315A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5067357A (en) 1989-08-19 1991-11-26 Mitsubishi Denki Kabushiki Kaisha Coaxial type starter device
JPH08105513A (ja) * 1994-09-30 1996-04-23 Aichi Mach Ind Co Ltd 高強度歯車
EP1832370B1 (fr) * 2006-03-09 2008-10-01 Winergy AG Procédé de fabrication d'engrenages à développante de roues dentées
US7712388B2 (en) * 2004-12-20 2010-05-11 Denso Corporation Starter with overrunning clutch
DE102010003361A1 (de) * 2010-03-26 2011-09-29 Robert Bosch Gmbh Geräuschoptimierte Verzahnung
CN103244570A (zh) 2012-02-06 2013-08-14 博世汽车部件(长沙)有限公司 车辆起动机及其花键装置
US9062646B2 (en) 2011-10-07 2015-06-23 Denso Corporation Starter
FR3039223A1 (fr) * 2015-07-20 2017-01-27 Valeo Equip Electr Moteur Pignon de demarreur de vehicule automobile muni d'un decrochement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5067357A (en) 1989-08-19 1991-11-26 Mitsubishi Denki Kabushiki Kaisha Coaxial type starter device
JPH08105513A (ja) * 1994-09-30 1996-04-23 Aichi Mach Ind Co Ltd 高強度歯車
US7712388B2 (en) * 2004-12-20 2010-05-11 Denso Corporation Starter with overrunning clutch
EP1832370B1 (fr) * 2006-03-09 2008-10-01 Winergy AG Procédé de fabrication d'engrenages à développante de roues dentées
DE102010003361A1 (de) * 2010-03-26 2011-09-29 Robert Bosch Gmbh Geräuschoptimierte Verzahnung
US9062646B2 (en) 2011-10-07 2015-06-23 Denso Corporation Starter
CN103244570A (zh) 2012-02-06 2013-08-14 博世汽车部件(长沙)有限公司 车辆起动机及其花键装置
FR3039223A1 (fr) * 2015-07-20 2017-01-27 Valeo Equip Electr Moteur Pignon de demarreur de vehicule automobile muni d'un decrochement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Evolventenverzahnung", WIKIPEDIA, 13 March 2010 (2010-03-13), pages 1 - 4, XP055008379, Retrieved from the Internet <URL:http://de.wikipedia.org/w/index.php?title=Evolventenverzahnung&oldid=71826834> [retrieved on 20110928] *

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