EP1878909B1 - Seilstart-Brennkraftmaschine mit Schmierungseinheit - Google Patents

Seilstart-Brennkraftmaschine mit Schmierungseinheit Download PDF

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Publication number
EP1878909B1
EP1878909B1 EP20060116880 EP06116880A EP1878909B1 EP 1878909 B1 EP1878909 B1 EP 1878909B1 EP 20060116880 EP20060116880 EP 20060116880 EP 06116880 A EP06116880 A EP 06116880A EP 1878909 B1 EP1878909 B1 EP 1878909B1
Authority
EP
European Patent Office
Prior art keywords
crankcase
pull
unit
crankshaft
gearbox
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
EP20060116880
Other languages
English (en)
French (fr)
Other versions
EP1878909A1 (de
Inventor
Chao-Chang Ho
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.)
Kwang Yang Motor Co Ltd
Original Assignee
Kwang Yang Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kwang Yang Motor Co Ltd filed Critical Kwang Yang Motor Co Ltd
Priority to EP20060116880 priority Critical patent/EP1878909B1/de
Publication of EP1878909A1 publication Critical patent/EP1878909A1/de
Application granted granted Critical
Publication of EP1878909B1 publication Critical patent/EP1878909B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/02—Arrangements of lubricant conduits
    • 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
    • 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
    • F02N15/006—Assembling or mounting of starting devices
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
    • F01M2001/062—Crankshaft with passageways

Definitions

  • This invention relates to a pull-start engine, and more particularly to a pull-start engine that includes a lubricating unit.
  • a conventional pull-start engine includes a crankcase unit 11, a pull-start unit 12, a gearbox unit 13, a first conduit unit 14, a second conduit unit 14', and a starter motor 15. Normally, the engine is started by means of the starter motor 15. When a battery unit (not shown) for providing electricity to the starter motor 15 is fully discharged, or when the starter motor 15 malfunctions, the pull-start unit 12 can be used to start the engine.
  • the crankcase unit 11 includes a crankcase 111, and a crankshaft 112 journalled within the crankcase 111 and formed with a lubricant passage 113 that permits a lubricant to flow therein for lubricating and dissipating heat from the crankshaft 112.
  • the pull-start unit 12 is disposed rotatably on the crankcase 111, and is operable to rotate the crankshaft 112 to thereby start the engine.
  • a surrounding wall 121 of the pull-start unit 12 is sleeved fixedly on an end of the crankshaft 112 of the crankcase unit 11.
  • the gearbox unit 13 includes a gearbox 131 connected fixedly to the crankcase 111 of the crankcase unit 11, and a drive shaft 132 journalled within the gearbox 131.
  • the drive shaft 132 is formed with a lubricant passage 133 that is communicated with the second conduit unit 14' and that permits the lubricant to flow therein for lubricating and dissipating heat from the drive shaft 132.
  • the first conduit unit 14 is disposed in the crankcase unit 11.
  • the lubricant is fed into one end portion of the lubricant passage 113 in the crankshaft 112 via the first conduit unit 14, and then flows from the other end portion of the lubricant passage 113 in the crankshaft 112 into the lubricant passage 133 in the drive shaft 132 via the second conduit unit 14'.
  • the object of this invention is to provide a pull-start engine that includes a lubricating unit, which can lubricate a crankshaft and a drive shaft effectively and efficiently, and which prevents excessive heating of a lubricant prior to reaching the drive shaft.
  • a pull-start engine includes a crankcase unit, a pull-start unit, a gearbox unit, and a lubricating unit.
  • the crankcase unit includes a crankcase, and a crankshaft journalled within the crankcase and formed with a lubricant passage.
  • the pull-start unit includes an annular base wall spaced apart from the crankcase and having an inner periphery, and a surrounding wall extending axially from the inner periphery of the base wall and sleeved fixedly on an end of the crankshaft of the crankcase unit.
  • the surrounding wall has an inner wall surface, an outer wall surface, an annular inner slot formed in the inner wall surface, a through hole formed in the outer wall surface and communicated with the inner slot, and two annular flanges extending radially and outwardly from the outer wall surface and flanking the through hole so as to define an annular outer slot between the flanges.
  • the gearbox unit includes a gearbox connected fixedly to the crankcase, and a drive shaft journalled within the gearbox and having a lubricant passage.
  • the lubricating unit includes an entrance passage formed in the crankcase and communicated with the outer slot in the pull-start unit, and a connecting passage formed in the crankcase and the gearbox and communicated with the outer slot in the pull-start unit and the lubricant passage in the drive shaft.
  • the lubricant flows from the entrance passage into the outer slot in the pull-start unit. Subsequently, a part of the lubricant flows from the outer slot into the lubricant passage in the crankshaft via the through hole and the inner slot in the pull-start unit, and another part of the lubricant flows from the outer slot into the lubricant passage in the drive shaft via the connecting passage. This results in an effective and efficient lubricating process, as well as preventing of excessive heating of the lubricant prior to reaching the drive shaft.
  • the preferred embodiment of a pull-start engine includes a crankcase unit 2, a pull-start unit 3 serving as a standby starter device, a gearbox unit 4, a lubricating unit 5, and a starter motor 6.
  • the crankcase unit 2 includes a crankcase body 21, a crankcase cover 22 formed with an axial hole 220, and a crankshaft 23 journalled within the crankcase body 21.
  • the crankcase cover 22 is connected fixedly to the crankcase body 21 so as to constitute a crankcase.
  • the crankshaft 23 is formed with a lubricant passage 231 that permits a lubricant to flow therein for lubricating and dissipating heat from the crankshaft 23.
  • the starter motor 6 is disposed on the crankcase unit 2 in a known manner, and is used to start the engine.
  • the pull-start unit 3 can be used to start the engine.
  • the pull-start unit 3 includes an annular base wall 31, a retaining wall 32, a surrounding wall 33, a reel 37, two retaining members 38, a pull rope 390, and a pull handle 391.
  • the base wall 31 is spaced apart from the crankcase 22.
  • the retaining wall 32 and the surrounding wall 33 extend respectively, integrally, and axially from outer and inner peripheries of the base wall 31 in opposite directions.
  • the retaining member 32 is formed with a plurality of notches 322 at an end distal from the base wall 31.
  • the surrounding wall 33 is sleeved fixedly on an end of the crankshaft 23.
  • the reel 37 is disposed rotatably within the crankcase cover 22, and is spaced apart from the base wall 31.
  • the retaining members 38 are disposed pivotally on the reel 37, and have free ends that are biased by a spring unit (not shown) toward a normal position whereat the free ends of the retaining members 38 are spaced apart from the retaining wall 32.
  • the pull rope 390 is biased by the spring unit to be wound on the reel 37, and has two ends fastened respectively to the reel 37 and the pull handle 391.
  • the pull handle 391 is operated so as to unwind the rope 390 from the reel 37 against the biasing action of the spring unit.
  • the free ends of the retaining members 38 pivot to engage respectively two of the notches 322 in the retaining wall 32 by virtue of centrifugal force acting on the retaining members 38. This results in co-rotation of the reel 37 with the retaining wall 32 and, thus, the crankshaft 23. Therefore, the engine is started.
  • the surrounding wall 33 has an annular inner slot 331 formed in an inner wall surface thereof, a radial through hole 332 formed in an outer wall surface thereof and communicated with the inner slot 331, and two annular flanges 333.
  • the annular flanges 333 extend radially and outwardly from the outer wall surface, and flank the through hole 332 so as to define an annular outer slot 34 therebetween.
  • Each of the flanges 333 has an annular outer surface formed with an annular slot 334 for receiving a small seal ring 335. As such, a liquid-tight seal is established between the crankcase body 21 and the flanges 333.
  • a large seal ring 35 is disposed between the surrounding wall 33 and the crankcase body 21 and between the base wall 31 and the small seal rings 335 so as to provide a double seal between the surrounding wall 33 and the crankcase body 21.
  • a bearing 36 is disposed between the crankshaft 23 and the crankcase cover 22 so as to facilitate rotation of the crankshaft 23 within the crankcase.
  • the gearbox unit 4 includes a gearbox 41 connected fixedly to the crankcase body 21, and a drive shaft 42 journalled within the gearbox 41 and formed with a lubricant passage 421 that permits the lubricant to flow therein for lubricating and dissipating heat from the drive shaft 42.
  • the lubricating unit 5 includes an entrance passage 51 formed in the crankcase cover 22 and having an inlet 511, and a connecting passage 52 formed in the crankcase body 21, the crankcase cover 22, and the gearbox 41.
  • the entrance passage 51 is communicated with the outer slot 34 in the pull-start unit 3.
  • the connecting passage 52 has two ends communicated respectively with the outer slot 34 and the lubricant passage 421 in the drive shaft 42.
  • the lubricant When the engine is started, the lubricant is fed into the inlet 511 by a pump (not shown). The lubricant flows into the outer slot 34 via the entrance passage 51. Subsequently, a part of the lubricant flows from the outer slot 34 into the lubricant passage 231 in the crankshaft 23 via the through hole 332 and the inner slot 331 in the pull-start unit 3, and another part of the lubricant flows from the outer slot 34 into the lubricant passage 421 in the drive shaft 42 via the connecting passage 52. Because the connecting passage 52 is directly connected with the outer slot 34, the connection from the starter (i.e., pull-start unit 3) to the gearbox 41 can be reduced and thus an excessive heating of the lubricant be avoided.
  • the starter i.e., pull-start unit 3

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Claims (7)

  1. Zugstartmotor mit:
    einer Kurbelgehäuseeinheit (2) mit einem Kurbelgehäuse und einer Kurbelwelle (23), die in dem Kurbelgehäuse gelagert ist, wobei die Kurbelwelle (23) mit einem Schmiermittelkanal (231) gebildet ist;
    einer Getriebeeinheit (4) mit einem Getriebe (41), das fest mit dem Kurbelgehäuse verbunden ist, und einer Antriebswelle (42), die in dem Getriebe (41) gelagert ist und einen Schmiermittelkanal (421) aufweist;
    einer lugstarteinheit (3) mit einer ringförmigen Basiswand (31), die von dem Kurbelge-häuse beabstandet ist und einen Innenumfang aufweist, und einer umgebenden Wand (33), diesich axial von dem Innenumfang der Basiswand (31) erstreckt und hülsenartig fest auf einem Ende der Kurbelwelle (23) angeordnet ist, wobei die umgebende Wand (33) eine Innenwandfläche, eine Außenwandfläche, einen ringförmigen inneren Schlitz (331), der in der Innenwandfläche gebildet ist, ein Durchgangsloch (332), das in der Außenwandfläche gebildet ist und mit dem inneren Schlitz (331) in Kommunikation steht, und zwei ringförmige Flansche (333), die sich radial und auswärts von der Außenwandfläche erstrecken und das Durchgangsloch (332) flankieren, um einen ringförmigen äußeren Schlitz (34) zwischen den Flanschen (333) zu bestimmen, aufweist; und
    einer Schmiereinheit (5) mit einem Einlasskanat (51), der in dem Kurbelgehäuse gebildet ist und mit dem äußeren Schlitz (34) in der Zugstarteinheit (3) in Kommunikation steht, und einem Verbindungskanal (52), der in dem Kurbelgehäuse und dem Getriebe (41) gebildet ist;
    dadurch gekennzeichnet, dass
    der Verbindungskanal (52) zwei Enden aufweist, die mit dem äußeren Schlitz (34) in der Zugstarteinheit (3) beziehungsweise dem Schmiermittelkanal (421) In der Antriebswelle (42) kommunizieren.
  2. ZugstartmotorgemäßAnspruch 1, dadurch gekennzeichnet, dassdas Kurbelgehäuse einen Kurbelgehäusekörper (21) und einen Kurbelgehäusedeckel (22) aufweist, der fest mit dem Kurbelgehäusekörper (21) verbunden ist und mit einem axialen Loch (220) gebildet ist, in dem die umgebende Wand (33) der Zugstarteinheit (3) rotationsfähig angeordnet ist.
  3. Zugstartmotor gemäß Anspruch 2, weiterhin dadurch gekennzeichnet, dass der Einlasskanal (51) der Schmiereinheit (5) in dem Kurbelgehäusedeckel (22) gebildet ist.
  4. Zugstartmotor gemäß Anspruch 2, weiterhin dadurch gekennzeichnet, dass der Verbindungskanal (52) der Schmiereinheit (5) in dem Kurbelgehäusekörper (21), dem Kurbelgehä usedeckel (22) und dem Getriebe (41) gebildet ist.
  5. Zugstartmotor gemäß Anspruch 2, weiterhin gekennzeichnet durch zwei kleine Dichtungsringe (335), die jeweils zwischen dem Kurbelgehäusekörper (21) und einem entsprechenden der Flansche (333) der Zugstarteinheit (3) angeordnet sind, um eine flüssigkeitsdichte Abdichtung dazwischen zu bilden.
  6. Zugstartmotor gemäß Anspruch 5, weiterhin gekennzeichnet durch einen großen Dichtungsring (35), der zwischen der umgebenden Wand (33) der Zugstarteinheit (3) und dem Kurbeigehäusekörper (21) und zwischen der Basiswand (31) der Zugstarteinheit (3) und den kleinen Dichtungsringen (335) angeordnet ist, um eine doppelte Abdichtung zwischen der umgebenden Wand (33) und dem Kurbelgehäusekörper (21) bereitzustellen.
  7. Zugstartmotor gemäß Anspruch 2, weiterhin gekennzeichnet durch ein Lager (36), das zwischen der Kurbelwelle (23) und dem Kurbelgehäusedeckel (22) angeordnet ist, um eine Rotation der Kurbelwelle (23) in dem Kurbelgehäuse zu erleichtern.
EP20060116880 2006-07-10 2006-07-10 Seilstart-Brennkraftmaschine mit Schmierungseinheit Not-in-force EP1878909B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20060116880 EP1878909B1 (de) 2006-07-10 2006-07-10 Seilstart-Brennkraftmaschine mit Schmierungseinheit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20060116880 EP1878909B1 (de) 2006-07-10 2006-07-10 Seilstart-Brennkraftmaschine mit Schmierungseinheit

Publications (2)

Publication Number Publication Date
EP1878909A1 EP1878909A1 (de) 2008-01-16
EP1878909B1 true EP1878909B1 (de) 2014-11-12

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ID=37487699

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Application Number Title Priority Date Filing Date
EP20060116880 Not-in-force EP1878909B1 (de) 2006-07-10 2006-07-10 Seilstart-Brennkraftmaschine mit Schmierungseinheit

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5722995A (en) * 1980-07-12 1982-02-06 Sanshin Ind Co Ltd Outboard engine
JPH0656193B2 (ja) * 1984-07-13 1994-07-27 ヤマハ発動機株式会社 車両用副変速機付内燃機関
JP3261263B2 (ja) * 1994-07-12 2002-02-25 本田技研工業株式会社 鞍乗型車両用パワーユニット

Also Published As

Publication number Publication date
EP1878909A1 (de) 2008-01-16

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