WO1989012743A1 - Cranking device for internal combustion engines - Google Patents

Cranking device for internal combustion engines Download PDF

Info

Publication number
WO1989012743A1
WO1989012743A1 PCT/DE1989/000315 DE8900315W WO8912743A1 WO 1989012743 A1 WO1989012743 A1 WO 1989012743A1 DE 8900315 W DE8900315 W DE 8900315W WO 8912743 A1 WO8912743 A1 WO 8912743A1
Authority
WO
WIPO (PCT)
Prior art keywords
pinion
internal combustion
starter
combustion engines
starter motor
Prior art date
Application number
PCT/DE1989/000315
Other languages
German (de)
French (fr)
Inventor
Otto Barthruff
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to BR898907012A priority Critical patent/BR8907012A/en
Publication of WO1989012743A1 publication Critical patent/WO1989012743A1/en

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
    • F02N15/08—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing being of friction type

Definitions

  • the invention relates to a starting device according to the type of the main claim.
  • Known starting devices have a starter motor, a downstream transmission and a single-pinion gear, which engages, for example, on a toothed ring of a flywheel attached to the crankshaft of an internal combustion engine.
  • the required high torque is achieved by means of a gearbox connected between the starter motor and the single-pinion gear, for example a planetary gearbox.
  • the disadvantage of the gearbox of the starter device is the running noise, which mainly arises from the engagement of the tooth flanks, which leads to vibrations of the entire gearwheel system.
  • Running noise and vibrations can only be kept within limits through very cost-intensive production.
  • the starting device according to the invention with the features mentioned in the main claim has the advantage that low-noise and low-vibration operation is achieved with a simple construction of the transmission, whereby, as with conventional transmissions, a synchronous operation of starter motor and single-pinion gear is achieved. This is based in particular on a high damping of the vibrations occurring during operation.
  • a starter device is particularly preferred, in which a toothed belt drive is provided between the starter motor and the single-pinion pinion, which can be inexpensively manufactured with the starter device running optimally.
  • FIG. 1 An exemplary embodiment is shown in the drawing and is explained in more detail in the following description.
  • the figure shows a partial section through a starter.
  • the illustration selected in the figure shows a gear starter or a starting device with a countershaft or a reduction gear, in which the pinion drive is provided with an outer bearing.
  • the design of the starter gear shown here can of course also be used in starting devices whose pinion is freely ejecting.
  • the drive device 1 has a single-pinion gear 3 mounted on a gear carrier shaft 2.
  • the gear carrier shaft 2 is mounted on its front end, which is on the left in the figure, in a first bearing 4, which is accommodated in a projection 5 of the housing 6 of the starter device 1.
  • a freewheel which is designed as a roller freewheel 7, is held by the gear carrier shaft.
  • the engagement spring 8 can be seen, which is supported on a guide ring 9 in addition to the freewheel.
  • a toothed belt pulley 10 is attached to the transmission support shaft 2, which is held at its rear end, which is the right end in the figure, by a second bearing 11, and a toothed belt is placed over the first toothed belt pulley 10.
  • the toothed belt is form-fitting engages with the front end 13 of the armature shaft 14 of the starter motor 15 formed as a toothed belt pulley.
  • the basic function of the starter device is not discussed further here, it is assumed to be known. It is readily apparent from the illustration that the power transmission from the drive shaft 14 of the starter motor 15 to the single-pinion gear 3 mounted on the gear carrier shaft 2 can follow without a gear transmission having to be provided. Vibrations and shocks occurring during operation are dampened by the belt itself. However, it is also possible to additionally provide a damping element on the first pulley 10 and / or in the drive or the single-pinion shaft.
  • Elongation of the toothed belt 12 is avoided by inserting a wire insert into the preferably elastic material of the belt.
  • a wire insert into the preferably elastic material of the belt.
  • piano strings 18 can be embedded in the elastic material.
  • the toothed belt drive is characterized by a particularly high efficiency of up to 99%. With a suitable design of the toothed belt, belt speeds of up to 80 ms " 1 can be achieved.
  • the toothed belt drive can be produced much more cost-effectively than a conventional gear, for example planetary gear, which is used in known starters or starting devices.

Abstract

A cranking device for internal combustion engines comprises a transmission, a starter, and a pinion. A toothed drive belt (12) transmits the force of the starter motor (15) to the pinion (3), which is supported on a transmission shaft (2). The starter motor (15) has a drive shaft (14) the front end (13) of which has grooves (16) and ribs (17) which ensure optimal force transmission from the drive shaft (14) to the pinion (3). The choice of a toothed belt (12) made of elastic material minimizes vibrations and noise during operation.

Description

II.
Andrehvorrichtung für BrennkraftmaschinenStarting device for internal combustion engines
Stand der TechnikState of the art
Die Erfindung geht aus von einer Andrehvorrichtung nach der Gattung des Hauptanspruchε.The invention relates to a starting device according to the type of the main claim.
Bekannte Andrehvorrichtungen weisen einen Startermo¬ tor, ein nachgeschaltetes Getriebe sowie ein Einspur¬ ritzel auf, welches beispielsweise auf einen Zahn¬ kranz eines an der Kurbelwelle einer Brennkraftma¬ schine angebrachten Schwungrads eingreift. Durch ein zwischen Startermotor und Einspurritzel geschaltetes Getriebe, beispielsweise ein Planetengetriebe, wird das erforderliche hohe Drehmoment erzielt.Known starting devices have a starter motor, a downstream transmission and a single-pinion gear, which engages, for example, on a toothed ring of a flywheel attached to the crankshaft of an internal combustion engine. The required high torque is achieved by means of a gearbox connected between the starter motor and the single-pinion gear, for example a planetary gearbox.
Nachteil des Getriebes der Andrehvorrichtung ist das Laufgeräusch, das hauptsächlich durch den Eingriff- stoß der Zahnflanken entsteht, der zu Schwingungen des gesamten Zahnradsyεtems führt. Laufgeräusch und Vibrationen können nur durch sehr kostenintensive Fertigung in Grenzen gehalten werden. Dabei muß eine genaue Verzahnungsgeometrie eingehalten werden, die Zahnflanken müssen gefräst und geschliffen werden, überdies muß das Zahnradgetriebe in einem Ölbad untergebracht werden.The disadvantage of the gearbox of the starter device is the running noise, which mainly arises from the engagement of the tooth flanks, which leads to vibrations of the entire gearwheel system. Running noise and vibrations can only be kept within limits through very cost-intensive production. One must exact tooth geometry must be adhered to, the tooth flanks must be milled and ground, moreover the gear wheel must be placed in an oil bath.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße Andrehvorrichtung mit den im Hauptanspruch genannten Merkmalen hat demgegenüber den Vorteil, daß bei einfachem Aufbau des Getriebes ein geräuεch- und vibrationsarmer Lauf erreicht wird, wobei, wie bei herkömmlichen Getrieben, ein syn¬ chroner Lauf von Startermotor und Einspurritzel er¬ reicht wird. Dies beruht insbesondere auf einer hohen Dämpfung der im Betrieb auftretenden Schwingungen.In contrast, the starting device according to the invention with the features mentioned in the main claim has the advantage that low-noise and low-vibration operation is achieved with a simple construction of the transmission, whereby, as with conventional transmissions, a synchronous operation of starter motor and single-pinion gear is achieved. This is based in particular on a high damping of the vibrations occurring during operation.
Besonders bevorzugt wird eine Andrehvorrichtung, bei der zwischen Startermotor und Einspurritzel ein Zahn¬ riemenantrieb vorgesehen ist, der bei optimalem Lauf- verhalten der AndrehVorrichtung preisgünstig her¬ stellbar ist.A starter device is particularly preferred, in which a toothed belt drive is provided between the starter motor and the single-pinion pinion, which can be inexpensively manufactured with the starter device running optimally.
Durch die in den Unteransprüchen aufgeführten Ma߬ nahmen sind vorteilhafte Weiterbildungen und Verbes¬ serungen der im Hauptanspruch angegebenen Andrehvor¬ richtung möglich. Besonders vorteilhaft ist es, daß das Getriebe' der Andrehvorrichtung wartungsfrei ist; die sonst übliche Schmierung entfällt. Die Lager der Andrehvorrichtung werden nur einer geringen Belastung unterworfen. ZeichnungThe measures listed in the subclaims permit advantageous developments and improvements of the starting device specified in the main claim. It is particularly advantageous that the transmission 'of the starting device is maintenance-free; the usual lubrication is eliminated. The bearings of the starter are only subjected to a slight load. drawing
Ein Auεführungsbeispiel ist in der Zeichnung darge¬ stellt und wird in der nachfolgenden Beschreibung nä¬ her erläutert. Die Figur zeigt einen Teilschnitt durch eine Andrehvorrichtung.An exemplary embodiment is shown in the drawing and is explained in more detail in the following description. The figure shows a partial section through a starter.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Die in der Figur gewählte Darstellung zeigt einen Ge¬ triebestarter bzw. eine Andrehvorrichtung mit einem Vorgelege bzw. einem Untersetzungsgetriebe, bei dem der Ritzeltrieb mit einem Außenlager versehen ist. Die hier dargestellte Ausbildung des Startergetriebeε kann natürlich auch bei Andrehvorrichtungen verwendet werden, deren Ritzel frei ausstoßend ist.The illustration selected in the figure shows a gear starter or a starting device with a countershaft or a reduction gear, in which the pinion drive is provided with an outer bearing. The design of the starter gear shown here can of course also be used in starting devices whose pinion is freely ejecting.
Die Antriebsvorrichtung 1 weist ein auf einer Getriebeträgerwelle 2 angebrachtes Einspurritzel 3 auf. Die Getriebeträgerwelle 2 ist auf ihrem vor¬ deren, in der Figur linken Ende in einem ersten Lager 4 gelagert, das in einem Vorsprung 5 des Gehäuses 6 der Andrehvorrichtung 1 untergebracht ist. Außer dem Ritzel 3 wird von der Getriebeträgerwelle ein bei¬ spielsweise als Rollenfreilauf 7 ausgebildeter Frei¬ lauf gehalten. Neben dem Rollenfreilauf ist die Ein¬ spurfeder 8 erkennbar, die sich außer am Freilauf an einem Führungsring 9 abstützt. Neben dem- Führungsring ist eine Zahnriemenscheibe 10 auf der Getriebeträ¬ gerwelle 2 angebracht, die an ihrem hinteren, in der Figur rechten Ende von einem zweiten Lager 11 gehal¬ ten wird, über die erste Zahnriemenscheibe 10 ist ein Zahnriemen gelegt. Der Zahnriemen steht ormschlüsεig mit dem vorderen alε Zahnriemenscheibe auεgebildeten Ende 13 der Ankerwelle 14 deε Startermotors 15 in Eingriff.The drive device 1 has a single-pinion gear 3 mounted on a gear carrier shaft 2. The gear carrier shaft 2 is mounted on its front end, which is on the left in the figure, in a first bearing 4, which is accommodated in a projection 5 of the housing 6 of the starter device 1. In addition to the pinion 3, a freewheel, which is designed as a roller freewheel 7, is held by the gear carrier shaft. In addition to the roller freewheel, the engagement spring 8 can be seen, which is supported on a guide ring 9 in addition to the freewheel. In addition to the guide ring, a toothed belt pulley 10 is attached to the transmission support shaft 2, which is held at its rear end, which is the right end in the figure, by a second bearing 11, and a toothed belt is placed over the first toothed belt pulley 10. The toothed belt is form-fitting engages with the front end 13 of the armature shaft 14 of the starter motor 15 formed as a toothed belt pulley.
Auf die Grundfunktion der Andrehvorrichtung wird hier nicht weiter eingegangen, sie wird als bekannt vorausgesetzt. Aus der Darstellung ist ohne weiteres erεichtlich, daß die Kraftübertragung von der An¬ triebswelle 14 des Startermotors 15 auf das auf der Getriebeträgerwelle 2 gelagerte Einspurritzel 3 er¬ folgen kann, ohne daß ein Zahnradgetriebe vorzusehen ist. Im Betrieb auftretende Vibrationen und Stöße werden durch den Riemen selbst gedämpft. Es ist je¬ doch auch möglich, zusätzlich ein Dämpfungselement auf der ersten Riemenscheibe 10 und/oder in der An¬ triebs- bzw. der Einspurritzel-Welle vorzusehen.The basic function of the starter device is not discussed further here, it is assumed to be known. It is readily apparent from the illustration that the power transmission from the drive shaft 14 of the starter motor 15 to the single-pinion gear 3 mounted on the gear carrier shaft 2 can follow without a gear transmission having to be provided. Vibrations and shocks occurring during operation are dampened by the belt itself. However, it is also possible to additionally provide a damping element on the first pulley 10 and / or in the drive or the single-pinion shaft.
Eine Dehnung des Zahnriemens 12 wird dadurch ver¬ mieden, daß in das vorzugsweiεe elastiεche Material deε Riemenε eine Drahteinlage eingebracht wird. Bei- spielεweise können Klaviersaiten 18 in das elastische Material eingebettet werden.Elongation of the toothed belt 12 is avoided by inserting a wire insert into the preferably elastic material of the belt. For example, piano strings 18 can be embedded in the elastic material.
Der Zahnriemenantrieb zeichnet sich durch einen be¬ sonders hohen Wirkungsgrad von bis zu 99% aus. Bei entsprechender Auslegung des Zahnriemens können Rie¬ mengeschwindigkeiten von bis zu 80 ms"1 erreicht wer¬ den.The toothed belt drive is characterized by a particularly high efficiency of up to 99%. With a suitable design of the toothed belt, belt speeds of up to 80 ms " 1 can be achieved.
Nach allem ist erkennbar, daß der Zahnriemenantrieb wesentlich kostengünstiger herstellbar ist als ein herkömmliches Getriebe, beispielsweise Planetenge¬ triebe, das in bekannten Startern bzw. Andrehvorrich¬ tungen Verwendung findet. After all, it can be seen that the toothed belt drive can be produced much more cost-effectively than a conventional gear, for example planetary gear, which is used in known starters or starting devices.

Claims

Ansprüche Expectations
1. Andrehvorrichtung für Brennkraftmaschinen mit einem Startermotor und einem Einspurritzel, d a d u r c.h g e k e n n z e i c h n e t , daß daε Getriebe einen Antriebsriemen (12) aufweist, der die Kraft des Startermotors (15) auf daε Einspurritzel (3) überträgt.1. Starting device for internal combustion engines with a starter motor and a single-track pinion, so that the gear has a drive belt (12) that transmits the power of the starter motor (15) to the single-track pinion (3).
2. Andrehvorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der Antriebsriemen als Zahnriemen (12) ausgebildet ist.2. Starting device according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the drive belt is designed as a toothed belt (12).
3. Andrehvorrichtung nach Anspruch 1 oder 2, d a ¬ d u r c h g e k e n n z e i c h n e t , daß der An¬ triebsriemen durch eine Drahteinlage verstärkt ist. 3. Starting device according to claim 1 or 2, so that the drive belt is reinforced by a wire insert.
PCT/DE1989/000315 1988-06-22 1989-05-20 Cranking device for internal combustion engines WO1989012743A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR898907012A BR8907012A (en) 1988-06-22 1989-05-20 STARTING DEVICE FOR COMBUSTION ENGINES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3821021.5 1988-06-22
DE19883821021 DE3821021A1 (en) 1988-06-22 1988-06-22 TURNING DEVICE FOR INTERNAL COMBUSTION ENGINES

Publications (1)

Publication Number Publication Date
WO1989012743A1 true WO1989012743A1 (en) 1989-12-28

Family

ID=6356981

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1989/000315 WO1989012743A1 (en) 1988-06-22 1989-05-20 Cranking device for internal combustion engines

Country Status (6)

Country Link
EP (1) EP0378603A1 (en)
JP (1) JPH03500197A (en)
BR (1) BR8907012A (en)
DE (1) DE3821021A1 (en)
ES (1) ES2015716A6 (en)
WO (1) WO1989012743A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547382A1 (en) * 1983-06-08 1984-12-14 Paris & Du Rhone Speed reduction gear
FR2552824A1 (en) * 1983-09-29 1985-04-05 Paris & Du Rhone INTERNAL COMBUSTION ENGINE STARTER

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547382A1 (en) * 1983-06-08 1984-12-14 Paris & Du Rhone Speed reduction gear
FR2552824A1 (en) * 1983-09-29 1985-04-05 Paris & Du Rhone INTERNAL COMBUSTION ENGINE STARTER

Also Published As

Publication number Publication date
DE3821021A1 (en) 1989-12-28
ES2015716A6 (en) 1990-09-01
EP0378603A1 (en) 1990-07-25
JPH03500197A (en) 1991-01-17
BR8907012A (en) 1990-12-26

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