EP3428444A1 - Moteur de démarreur pour moteur à combustion interne - Google Patents

Moteur de démarreur pour moteur à combustion interne Download PDF

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Publication number
EP3428444A1
EP3428444A1 EP17180489.1A EP17180489A EP3428444A1 EP 3428444 A1 EP3428444 A1 EP 3428444A1 EP 17180489 A EP17180489 A EP 17180489A EP 3428444 A1 EP3428444 A1 EP 3428444A1
Authority
EP
European Patent Office
Prior art keywords
driveshaft
axially
support housing
starter according
ring
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Withdrawn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
EP17180489.1A
Other languages
German (de)
English (en)
Inventor
Jani MERKUN
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 EP17180489.1A priority Critical patent/EP3428444A1/fr
Publication of EP3428444A1 publication Critical patent/EP3428444A1/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Withdrawn legal-status Critical Current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
    • F02N15/02—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
    • 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
    • F02N15/043—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
    • 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
    • F02N15/066—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 being of the coaxial 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
    • F02N15/06—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 present invention relates to a starter for an internal combustion engine with the features of the preamble of Claim 1.
  • a generic starter is known, for example, from WO 2013/117161 A1 . It comprises a support housing for mounting the starter on the internal combustion engine. There is furthermore provided an electric motor which is fixed on the support housing and which has a motor shaft. This is supplemented by a planetary transmission, which has a sun gear, a plurality of planetary gears, an internal gear and a planetary carrier.
  • a one way clutch is furthermore provided which has an inner ring, an outer ring and a plurality of clamping bodies, in particular clamping rollers.
  • a driveshaft of the starter has a pinion and a toothed shaft portion.
  • an electromagnetic actuator for axial adjustment of the driveshaft between an extended active position, in which the pinion is in engagement with a ring gear of the internal combustion engine for starting the internal combustion engine, and a retracted passive position, in which the pinion is spaced apart from the ring gear.
  • the sun gear is connected in a rotationally conjoint manner to the motor shaft.
  • the planetary carrier is connected in a rotationally conjoint manner to the inner ring.
  • the toothed shaft portion is in engagement with a toothing of the outer ring.
  • the present invention deals with the problem of indicating an improved embodiment, which is characterized in particular by reduced wear, for a starter of the type described above.
  • the invention is based on the general concept of equipping the starter with a limiting device which serves to limit the extension of the driveshaft to the active position.
  • a limiting device which serves to limit the extension of the driveshaft to the active position.
  • the actuator and the drive coupling provided between actuator and driveshaft are relieved of this function. It is precisely in the end phase of the extension movement that the electromagnetic actuator reaches its greatest actuating force and thus also its highest actuating speed.
  • the driveshaft accordingly retracts with the highest actuating speed into the active position. If this is limited in a conventional manner by a stop in the actuator, the relatively large mass, in comparison to the actuator, of the driveshaft which has to be stopped abruptly leads to a high mechanical loading of the actuator and the drive coupling between actuator and driveshaft.
  • the limiting device according to the invention cooperates with the driveshaft and limits, in particular like a stop, its extension movement to the active position, as a result of which a retroactive effect on the actuator can be avoided.
  • the invention furthermore proposes configuring the limiting device so that it supports the driveshaft directly or indirectly axially on the support housing at least in the active position while avoiding, i.e. by-passing, the clamping bodies or clamping rollers of the one way clutch.
  • axial support of the driveshaft for braking the driveshaft when the active position is reached is performed without an axial loading of the clamping bodies.
  • the clamping bodies are thus protected from increased wear.
  • the limiting device can furthermore expediently be configured so that it supports the driveshaft directly or indirectly axially at least in the active position while furthermore avoiding or by-passing, respectively, the outer ring of the one way clutch on the support housing.
  • the limiting device can have a positioning ring fitted axially fixedly on the driveshaft and an annular collar formed on the inner ring, on which annular collar the positioning ring is supported directly or indirectly axially at least in the active position. Since this positioning ring is necessarily located within the inner ring and preferably within the one way clutch, this solution has a very compact design. As a result of the direct or indirect support between positioning ring and annular collar, the introduction of force is carried out during braking of the extending driveshaft on the inner ring.
  • the positioning ring is accordingly arranged on the driveshaft in such a manner that the toothed shaft portion is located axially between the positioning ring and the pinion.
  • positioning ring is supported axially directly on the annular collar in the active position.
  • the positioning ring comes to bear axially directly on the annular collar in the active position.
  • the limiting device furthermore has a return spring via which the positioning collar is axially supported on the annular collar.
  • the arrangement of the return spring is carried out so that it is tensioned during extension of the driveshaft. The provision of such a return spring reduces the impact impulse of the driveshaft when the active position is reached.
  • a transmission gear is provided for drive coupling the electric motor with the one way clutch, or in more details for drive coupling the motor shaft of the electric motor with the inner ring of the one way clutch.
  • a planetary transmission is provided, which has a sun gear, a plurality of planetary gears, an internal gear and a planetary carrier, wherein the sun gear is connected in a rotationally conjoint manner to the motor shaft, and wherein the planetary carrier is connected in a rotationally conjoint manner to the inner ring or forms the inner ring.
  • One embodiment is particularly advantageous in which the inner ring is formed by an integral portion of the planetary carrier. The production costs are reduced as a result of this integral design.
  • Another advantageous embodiment proposes axially supporting the planetary carrier on the internal gear or on an internal gear carrier, on which the internal gear is fixed, and mounting it rotatably thereon. This can be carried out, for example, via a bearing bushing. This measure supports a compact design.
  • the internal gear can thus expediently be fixed on the support housing.
  • the internal gear is connected to the support housing in an axially fixed and rotationally conjoint manner. This can preferably be carried out with the aid of an internal gear carrier on which the internal gear is fixed and which itself is fixed on the support housing.
  • the driveshaft can be supported by means of the limiting device in the active position via a force-transmission path on the support housing, which path leads from the driveshaft via the positioning ring, where applicable via the return spring, via the annular collar, via the inner ring, via the planetary carrier, where applicable via the bearing bushing, via the internal gear or the internal gear carrier up to the support housing.
  • This force-transmission path bypasses the clamping bodies and the outer ring and as a result relieves the load on the one way clutch.
  • An alternative embodiment proposes equipping the limiting device with an annular disc which is arranged in an axially fixed manner on the driveshaft axially outside the one way clutch.
  • the functionality of the limiting device namely the braking of the driveshaft, is moved out of the interior of the one way clutch when the active position is reached.
  • the limiting device can thus be embodied in a more space-saving manner and preferably accommodated in the support housing.
  • the driveshaft can have a bearing portion which is arranged axially between the toothed shaft portion and the pinion and in which the driveshaft is mounted rotatably and axially displaceably on the support housing.
  • a particularly reliable axial guidance for the driveshaft is produced as a result of this.
  • the annular disc of the limiting device can thus advantageously be arranged axially between the bearing portion and the toothed shaft portion axially fixedly on the driveshaft. As a result of this, the annular disc is located inside the support housing.
  • a different further development proposes mounting the driveshaft rotatably and axially displaceably with its bearing portion via an anti-friction bearing, like a ball and roller bearing, on the support housing.
  • an anti-friction bearing like a ball and roller bearing
  • the bearing portion is mounted axially displaceably in a bearing inner ring of the anti-friction bearing, while the bearing inner ring is mounted rotatably on a bearing outer ring via anti-friction bodies, such as e.g. balls, rollers or cylinders.
  • the bearing outer ring is mounted conventionally in an axially fixed manner and generally also rotationally conjointly on the support housing.
  • the annular disc can thus advantageously be supported directly or indirectly axially on the anti-friction bearing at least in the active position.
  • the anti-friction bearing can take on an additional function in that it absorbs the axial forces required for braking the driveshaft when the active position is reached.
  • the limiting device can expediently have a return spring via which the annular disc is supported axially on the anti-friction bearing and which is tensioned during extension of the driveshaft. In this manner, the impact impulse of the driveshaft when the active position is reached is reduced.
  • the return spring can preferably bear against the anti-friction bearing and against the annular disc in an axially pretensioned manner already in the passive position.
  • a starter 1 which serves to start an internal combustion engine, not shown here, comprises a support housing 2 with which the starter 1 can be mounted on the internal combustion engine.
  • Starter 1 furthermore has an electric motor 3 which is fixed on support housing 2 and which has a motor shaft 4.
  • a planetary transmission 5 is furthermore provided with which the rotational speed of motor shaft 4 can be reduced.
  • Planetary transmission 5 has a sun gear 6, a plurality of planetary gears 7, an internal gear 8 and a planetary carrier 9.
  • Starter 1 is furthermore equipped with a one way clutch 10 which is arranged inside support housing 2 and which has an inner ring 11, an outer ring 12 and a plurality of clamping bodies 13 which are preferably configured here as clamping rollers.
  • Starter 1 is furthermore equipped with a driveshaft 14 which has a pinion 15 and a toothed shaft portion 16. Moreover, starter 1 is equipped with an electromagnetic actuator 17 which is fixed on support housing 2 and which is coupled in terms of drive via a coupling device 18 to driveshaft 14. Actuator 17, which is preferably configured as a solenoid, serves the purpose of axial adjustment of driveshaft 14 between an extended active position AS, which is only indicated in Fig. 3 and in which pinion 15 is in engagement with a ring gear, not shown here, of the internal combustion engine, and a retracted passive position PS, which is shown in Figs. 1 , 3 and 4 and in which pinion 15 is spaced apart from the ring gear.
  • driveshaft 14 is adjustable, is defined by longitudinal central axis 19 of driveshaft 14 which here furthermore coincides with the axis of rotation of motor shaft 4 or of electric motor 3.
  • the axial direction is indicated in the figures by a double arrow and designated by 20.
  • the terms "extended” and “retracted” relate to support housing 2, out of which driveshaft 14 extends in order to reach active position AS.
  • driveshaft 14 is maximally retracted into support housing 2.
  • pinion 15 remains outside support housing 2.
  • sun gear 6 is connected in a rotationally conjoint manner to motor shaft 4.
  • Sun gear 6 is in engagement with planetary gears 7.
  • Planetary gears 7 are mounted rotatably on planetary carrier 9 via planetary support shafts 21.
  • Planetary gears 7 are in engagement with internal gear 8.
  • Internal gear 8 is supported in a suitable manner rotationally conjointly on support housing 2. This can in principle be carried out directly.
  • an internal gear carrier 22 is provided which is connected in an axially fixed and rotationally conjoint manner to support housing 2 and on which internal gear 8 is supported in a rotationally conjoint and axially fixed manner.
  • planetary carrier 9 is connected in a rotationally conjoint manner to inner ring 11.
  • planetary carrier 9 here itself forms inner ring 11.
  • planetary carrier 9 possesses a sleeve body 23 which proceeds from a plate body 24 and extends concentrically into outer ring 16.
  • Sleeve body 23 thus forms inner ring 11.
  • Planetary support shafts 21 are fixed on plate body 24 so that plate body 24 has the support function for planetary gears 7.
  • inner ring 11 is formed by an integral portion of planetary carrier 9, namely by stated sleeve body 23.
  • Toothed shaft portion 16 is in engagement with a toothing 25 of outer ring 12.
  • the teeth, not designated in greater detail, of toothed shaft portion 16 extend in a helix-like manner or spirally. Alternatively, a purely axial alignment of the teeth would in principle also be conceivable here.
  • driveshaft 14 has a bearing portion 31 which is located on driveshaft 14 axially between toothed shaft portion 16 and pinion 15.
  • driveshaft 14 is mounted rotatably and axially displaceably on support housing 2.
  • support housing 2 is expediently equipped with an anti-friction bearing 32.
  • Anti-friction bearing 32 possesses an inner bearing ring 33, a plurality of anti-friction bodies 34, which are configured here by way of example as balls, and an outer bearing ring 35.
  • inner bearing ring 33 is mounted rotatably on outer bearing ring 35 via anti-friction bodies 34.
  • Bearing portion 31 extends through inner bearing ring 33 and is supported radially on anti-friction bearing 32 via this.
  • Bearing portion 31 is furthermore mounted axially displaceably on inner bearing ring 33.
  • Starter 1 presented here is furthermore equipped with a limiting device 26 with the aid of which the extension of driveshaft 14 can be limited to active position AS.
  • Limiting device 26 is preferably designed so that it supports driveshaft 14 directly or indirectly axially on support housing 2 at least in active position AS while bypassing clamping bodies 13 and preferably also bypassing outer ring 12.
  • a first embodiment of limiting device 26 is explained in greater detail below on the basis of Figs. 1 to 3 and a second embodiment of limiting device 26 is explained in greater detail on the basis of Fig. 4 .
  • limiting device 26 comprises, in the case of the first embodiment, a positioning ring 27 fitted in an axially fixed manner on driveshaft 14 and an annular collar 28 formed on inner ring 11. Positioning ring 27 can be supported directly or indirectly axially on said annular collar 28 at least in active position AS. In the case of the embodiment shown here, positioning ring 27 is supported directly on annular collar 28 exclusively in active position AS so that positioning ring 27 then bears directly against annular collar 28. In the case of a different embodiment, not shown here, limiting device 26 can furthermore have a return spring via which positioning ring 27 is supported axially, preferably permanently, on annular collar 28, wherein this return spring is tensioned during extension of driveshaft 14.
  • Positioning ring 27 is arranged within sleeve body 24 of planetary carrier 9 and is located on driveshaft 14 on a side of toothed shaft portion 16 facing away from pinion 15.
  • planetary carrier 9 is supported axially on internal gear 8 or on internal gear carrier 22 and is rotatably mounted thereon. This is achieved with the aid of a bearing bushing 29.
  • An axial gap 30 is normally formed axially between a front side of inner ring 11 and an internal annular step of outer ring 12 in order to avoid friction between inner ring 11 and outer ring 12.
  • Limiting device 26 generates a force-transmission path via which driveshaft 14 is supported on support housing 2 in active position AS. This force-transmission path begins at positioning ring 27 and runs via annular collar 28, inner ring 11, bearing carrier 9, bearing bushing 29, internal gear carrier 22 up to support housing 2.
  • limiting device 26 has an annular disc 36 which is arranged axially fixed on driveshaft 14 axially outside one way clutch 10.
  • said annular disc 36 is located axially between bearing portion 31 and toothed shaft portion 16.
  • limiting device 26 is furthermore equipped with a return spring 37 which is supported axially on one hand on annular disc 36 and axially on the other hand on anti-friction bearing 32, in particular on inner bearing ring 33.
  • Return spring 37 is arranged so that it is tensioned during extension of driveshaft 14.
  • Return spring 37 can furthermore expediently be dimensioned so that it is also axially pretensioned in passive position PS and is correspondingly supported on anti-friction bearing 32 and on annular disc 36 under axial pretensioning.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Motor Power Transmission Devices (AREA)
EP17180489.1A 2017-07-10 2017-07-10 Moteur de démarreur pour moteur à combustion interne Withdrawn EP3428444A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17180489.1A EP3428444A1 (fr) 2017-07-10 2017-07-10 Moteur de démarreur pour moteur à combustion interne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17180489.1A EP3428444A1 (fr) 2017-07-10 2017-07-10 Moteur de démarreur pour moteur à combustion interne

Publications (1)

Publication Number Publication Date
EP3428444A1 true EP3428444A1 (fr) 2019-01-16

Family

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EP17180489.1A Withdrawn EP3428444A1 (fr) 2017-07-10 2017-07-10 Moteur de démarreur pour moteur à combustion interne

Country Status (1)

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EP (1) EP3428444A1 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5086658A (en) * 1989-09-26 1992-02-11 Mitsubishi Denki K.K. Coaxial engine starter
US5156057A (en) 1990-10-15 1992-10-20 Mitsubishi Denki K.K. Starter
US5317933A (en) 1990-03-03 1994-06-07 Robert Bosch Gmbh Starting device of compact construction
EP0745768A1 (fr) * 1995-05-29 1996-12-04 Mitsuba Electric Manufacturing Co., Ltd. Démarreur pour moteur à combustion interne muni d'un ensemble de pignon amélioré
DE29719524U1 (de) * 1997-11-04 1999-03-04 Robert Bosch Gmbh, 70469 Stuttgart Andrehvorrichtung für Brennkraftmaschinen
WO2000026533A1 (fr) 1998-11-03 2000-05-11 Delco Remy America, Inc. Demarreur de moteur a embrayage a roue libre, stationnaire et axial
FR2861138A1 (fr) * 2003-10-16 2005-04-22 Denso Corp Demarreur avec embrayage unidirectionnel pour demarrer un moteur a combustion interne
DE102005001944A1 (de) * 2004-01-16 2005-08-18 Denso Corp., Kariya Starter
CN103147893A (zh) * 2013-03-07 2013-06-12 无锡市闽仙汽车电器有限公司 大功率行星减速起动机
WO2013117161A1 (fr) 2012-02-06 2013-08-15 Bosch Automotive Products (Changsha) Co. Ltd. Démarreur de véhicule automobile et engrenage d'entraînement de celui-ci
US20150130309A1 (en) 2012-05-16 2015-05-14 Valeo Equipements Electriques Moteur Starter for a combustion engine

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5086658A (en) * 1989-09-26 1992-02-11 Mitsubishi Denki K.K. Coaxial engine starter
US5317933A (en) 1990-03-03 1994-06-07 Robert Bosch Gmbh Starting device of compact construction
US5156057A (en) 1990-10-15 1992-10-20 Mitsubishi Denki K.K. Starter
EP0745768A1 (fr) * 1995-05-29 1996-12-04 Mitsuba Electric Manufacturing Co., Ltd. Démarreur pour moteur à combustion interne muni d'un ensemble de pignon amélioré
DE29719524U1 (de) * 1997-11-04 1999-03-04 Robert Bosch Gmbh, 70469 Stuttgart Andrehvorrichtung für Brennkraftmaschinen
WO2000026533A1 (fr) 1998-11-03 2000-05-11 Delco Remy America, Inc. Demarreur de moteur a embrayage a roue libre, stationnaire et axial
FR2861138A1 (fr) * 2003-10-16 2005-04-22 Denso Corp Demarreur avec embrayage unidirectionnel pour demarrer un moteur a combustion interne
DE102005001944A1 (de) * 2004-01-16 2005-08-18 Denso Corp., Kariya Starter
WO2013117161A1 (fr) 2012-02-06 2013-08-15 Bosch Automotive Products (Changsha) Co. Ltd. Démarreur de véhicule automobile et engrenage d'entraînement de celui-ci
US20150130309A1 (en) 2012-05-16 2015-05-14 Valeo Equipements Electriques Moteur Starter for a combustion engine
CN103147893A (zh) * 2013-03-07 2013-06-12 无锡市闽仙汽车电器有限公司 大功率行星减速起动机

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