CN103047043A - Cam chamber of four-stroke engine - Google Patents

Cam chamber of four-stroke engine Download PDF

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Publication number
CN103047043A
CN103047043A CN2013100223240A CN201310022324A CN103047043A CN 103047043 A CN103047043 A CN 103047043A CN 2013100223240 A CN2013100223240 A CN 2013100223240A CN 201310022324 A CN201310022324 A CN 201310022324A CN 103047043 A CN103047043 A CN 103047043A
Authority
CN
China
Prior art keywords
cam chamber
stroke engine
cam
chamber
wall
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
CN2013100223240A
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Chinese (zh)
Inventor
孔钊
郭宁
冯可亚
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.)
Suzhou Cleva Precision Machinery and Technology Co Ltd
Original Assignee
Suzhou Cleva Precision Machinery and Technology 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 Suzhou Cleva Precision Machinery and Technology Co Ltd filed Critical Suzhou Cleva Precision Machinery and Technology Co Ltd
Priority to CN2013100223240A priority Critical patent/CN103047043A/en
Publication of CN103047043A publication Critical patent/CN103047043A/en
Priority to PCT/CN2014/070891 priority patent/WO2014114214A1/en
Pending legal-status Critical Current

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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
    • F01M1/04—Pressure lubrication using pressure in working cylinder or crankcase to operate lubricant feeding devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/026—Gear drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • 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
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/101—Lubrication of valve gear or auxiliaries of cam surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N31/00—Means for collecting, retaining, or draining-off lubricant in or on machines or apparatus
    • F16N31/02—Oil catchers; Oil wipers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
    • F16N7/30—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated the oil being fed or carried along by another fluid
    • F16N7/32—Mist lubrication

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The invention discloses a cam chamber of a four-stroke engine. The cam chamber is provided with a bottom and a backflow groove. A smooth plane is arranged at the bottom and can smoothly leads lubricating oil in the cam chamber into the backflow groove, so that the lubricating oil is prevented from being detained in the cam chamber, and the utilization efficiency of the lubricating oil in the cam chamber is improved.

Description

The cam chamber of four stroke engine
Technical field
The present invention relates to a kind of cam chamber of four stroke engine.
Background technique
At present, as the hand-held shears for lawns take vegetation as object (cut-off machine) and Backpack power machine, traditional two-stroke and four-stroke small-sized universal engine, portable or bearing the motor of the working machine that carries out operation as driving operating personnel oneself, be widely used.Because it is more and more stricter that the pollutant emission regulation becomes, so the demand that driving source is replaced by four stroke engine from two-stroke improves day by day.Yet four stroke engine has more complicated lubrication system, this so that motor when moving with the angle of inclination, not too work.The lubricated main design problem that becomes each motor manufacturer only has Honda Company to be used for the four stroke engine that can work of batch production by European patent EP835987 patented technology now under various angles of inclination.This technology adopts Special oil tank around being installed in rotating blade on the bent axle producing mist of oil, but designed engines is wider in this way, and heavier, cost is higher.The U. S. Patent of FUJIROBIN company has disclosed for US6213079 number on the motor, particularly cylinder block with comparatively complicated lubrication system in addition comparatively complicated oil line pipe, makes processed complex, and cost improves.
In addition, another kind of petrol engine also appears on the market, the cam chamber of its setting is to utilize the outer wall of cylinder as the bottom surface and around the bottom surface sidewall to be set, formed cam chamber, therefore the bottom surface of cam chamber is arc and groove is arranged, cause parts of lubricating oil to be detained within it easily, be not easy to be back to fuel reserve tank, thereby the utilization ratio of lubricant oil has been produced adverse effect.
Summary of the invention
The object of the invention is to provides a kind of cam chamber of improved four stroke engine for defects of the prior art, can improve the utilization ratio of the lubricant oil in it.
For achieving the above object, the present invention has adopted following core technology scheme: a kind of cam chamber of four stroke engine, be provided with bottom and back flash, it is characterized in that: described bottom is provided with smooth plane, and described plane can be guided to described back flash swimmingly with the lubricant oil in the described cam chamber.
In addition, the present invention also proposes following attached technological scheme:
Be directly mutually to connect between described plane and the described back flash.
Described four stroke engine also comprises the cylinder that is positioned at described cam chamber side, and described cylinder has circular outer wall.
Described bottom is adjacent with described outer wall.
The cam chamber of described four stroke engine, its both sides are offered notch part respectively so that the outer wall of described cylinder is for roughly waiting wall thickness.
The cam chamber of described four stroke engine also comprises the sidewall that is positioned at described two bottom sides.
Described sidewall is provided with circular arc part, and described circular arc part links to each other with described back flash.
The cam chamber of described four stroke engine, its inside also comprise gear and the cam mechanism that is installed on the described bottom.
Than prior art, the invention has the advantages that: the cam chamber of four stroke engine of the present invention, do not recycle the outer wall of cylinder as the bottom surface, but at outer wall a bottom is set separately, and the bottom is provided with smooth plane, this plane can be guided to the lubricant oil in the described cam chamber back flash of cam chamber swimmingly, and has avoided lubricant oil to be detained in cam chamber, so improved the utilization ratio of the lubricant oil in the cam chamber.
Description of drawings
Fig. 1 is the part three-dimensional view corresponding to the four stroke engine of preferred embodiment of the present invention.
Fig. 2 is the sectional view of A-A line in Fig. 1.
Fig. 3 is the part three-dimensional view of Fig. 1.
Fig. 4 is another part three-dimensional view of Fig. 1.
Embodiment
Below in conjunction with preferred embodiment and accompanying drawing thereof technical solution of the present invention is done further nonrestrictive detailed description.
See figures.1.and.2, corresponding to the four stroke engine 10 of preferred embodiment of the present invention, roughly comprise rocker arm chamber 1, piston 3, cam chamber 5, crankshaft room 7, valve box 9 and fuel reserve tank 11 from top to bottom.Also be provided with lubrication system (not label) in this motor 10, the function of this lubrication system is to carry quantitative cleaning lubricant oil to the part surface of doing relative movement, to realize liquid friction, reduces surface friction drag, alleviates the wearing and tearing of parts; And part surface cleaned and cool off.This lubrication system, it utilizes the to-and-fro motion of piston 3 and pressure in the crankshaft room 7 that produces change.The negative pressure that produces when piston 3 moves from lower dead centre to upper dead center is on the one hand by being arranged on the path between crankshaft room 7 and the fuel reserve tank 11 and lubricant oil being sucked lubricated each component (not label) in it in the crankshaft room 7 under the effect of crankshaft room's 7 interior negative pressure; The lubricant oil suction crankshaft room 7 that to lubricate each component in the rocker arm chamber 1 by the way to cycle oil that is arranged between crankshaft room 7 and the rocker arm chamber 1 on the other hand.The malleation that when piston 3 moves from upper dead center to lower dead centre, produces, by the one-way leaf valve (not shown) that is arranged between crankshaft room 7 and the valve box 9 mist of oil of crankshaft room's 7 interior generations is pressed into valve box 9, the lubricant oil that enters valve box 9 is back to fuel reserve tank 11 by the hole (not shown) that is arranged between valve box 9 and the fuel reserve tank 11, the part mist of oil that enters simultaneously valve box 9 enters cam chamber 5 lubricated cam mechanisms 52 by the orifice flow that is arranged on valve box 9 and cam chamber 5 bottoms, and this cam mechanism 52 comprises cam 57 and cam follower 59; The mist of oil that lubricated cam mechanism 52 flows into rocker arm chamber 1 by the path that is arranged on cam chamber 5 tops and rocker arm chamber 1 bottom and continues each component (not label) in the lubricated rocker arm chamber 1.Be provided with in addition the open end of the vent passage that communicates with air filter (not shown) on the Carburetor in the central position of rocker arm chamber 1, this vent passage will produce in lubrication oil circulation blows the open end that gas leakage drains into the Carburetor entrance, and so that this blows gas leakage enters the firing chamber and burn.
With further reference to Fig. 3 to Fig. 4, above-mentioned four stroke engine 10 also comprises the cylinder 100 that is arranged on cam chamber 5 sides, and this cylinder 100 has circular outer wall 102.Corresponding to preferred embodiment of the present invention, cam chamber 5 does not recycle the outer wall 102 of cylinder 100 as the bottom surface, but at outer wall 102 bottom 54 is set separately, and described bottom 54 is adjacent with described outer wall 102.This bottom 54 has smooth plane 58 and back flash 56.Be directly mutually to connect between this smooth plane 58 and the described back flash 56, like this, plane 58 can be guided to described back flash 56 swimmingly with the lubricant oil in the described cam chamber 5, and has avoided the delay of lubricant oil in cam chamber, so improved the utilization ratio of the lubricant oil in the cam chamber.In addition, cam chamber 5 also comprises the sidewall 51 that is positioned at 54 both sides, described bottom, and this sidewall 51 comprises circular arc part 53, and described circular arc part 53 links to each other with described back flash 56, and such sidewall 51 structures have also strengthened the backflow effect of lubricant oil.Cam chamber 5 inside also are provided with gear 55 except cam mechanism 52 is set, this cam mechanism 52 and gear 55 all are positioned on the above-mentioned bottom 54.Simultaneously, notch part 500 is offered respectively in the both sides of cam chamber 5, so that the outer wall 102 of cylinder 100 has the wall thickness that waits roughly, thereby so that four stroke engine 10 can stable operation.
It is pointed out that above-mentioned preferred embodiment only is explanation technical conceive of the present invention and characteristics, its purpose is to allow the personage who is familiar with technique can understand content of the present invention and according to this enforcement, can not limit protection scope of the present invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.

Claims (8)

1. the cam chamber of a four stroke engine is provided with bottom and back flash, and it is characterized in that: described bottom is provided with smooth plane, and described plane can be guided to described back flash swimmingly with the lubricant oil in the described cam chamber.
2. the cam chamber of described four stroke engine according to claim 1 is characterized in that: between described plane and the described back flash for directly mutually connecting.
3. the cam chamber of described four stroke engine according to claim 1, it is characterized in that: described four stroke engine also comprises the cylinder that is positioned at described cam chamber side, described cylinder has circular outer wall.
4. the cam chamber of described four stroke engine according to claim 3, it is characterized in that: described bottom is adjacent with described outer wall.
5. the cam chamber of described four stroke engine according to claim 3 is characterized in that notch part is offered respectively in its both sides so that the outer wall of described cylinder is for roughly waiting wall thickness.
6. the cam chamber of described four stroke engine according to claim 1 is characterized in that it also comprises the sidewall that is positioned at described two bottom sides.
7. the cam chamber of described four stroke engine according to claim 6, it is characterized in that: described sidewall is provided with circular arc part, and described circular arc part links to each other with described back flash.
8. according to claim 1 to the cam chamber of 7 each described four stroke engine, it is characterized in that its inside also comprises gear and the cam mechanism that is positioned on the described bottom.
CN2013100223240A 2013-01-22 2013-01-22 Cam chamber of four-stroke engine Pending CN103047043A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2013100223240A CN103047043A (en) 2013-01-22 2013-01-22 Cam chamber of four-stroke engine
PCT/CN2014/070891 WO2014114214A1 (en) 2013-01-22 2014-01-20 Cam chamber of four-stroke engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013100223240A CN103047043A (en) 2013-01-22 2013-01-22 Cam chamber of four-stroke engine

Publications (1)

Publication Number Publication Date
CN103047043A true CN103047043A (en) 2013-04-17

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Family Applications (1)

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CN2013100223240A Pending CN103047043A (en) 2013-01-22 2013-01-22 Cam chamber of four-stroke engine

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CN (1) CN103047043A (en)
WO (1) WO2014114214A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014114214A1 (en) * 2013-01-22 2014-07-31 苏州科瓴精密机械科技有限公司 Cam chamber of four-stroke engine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6213079B1 (en) * 1998-06-03 2001-04-10 Fuji Robin Kabushiki Kaisha Lubricating apparatus for four-cycle engines
JP2002339715A (en) * 2001-05-14 2002-11-27 Ishikawajima Shibaura Mach Co Ltd Lubricating device of four-cycle engine
EP1267055A1 (en) * 1999-01-25 2002-12-18 BRIGGS & STRATTON CORPORATION Four-stroke internal combustion engine
CN1483923A (en) * 2002-09-20 2004-03-24 重庆宗申技术开发研究有限公司 Pordable four-stroke gasoline engine
CN101413412A (en) * 2007-10-16 2009-04-22 财团法人工业技术研究院 Lubrication apparatus of four-stroke engine
US7584736B2 (en) * 2007-10-03 2009-09-08 Industrial Technology Research Institue Lubrication device of four-stroke engines
WO2010011163A1 (en) * 2008-07-22 2010-01-28 Husqvarna Ab A lubrication device in a four-stroke engine
CN203130280U (en) * 2013-01-22 2013-08-14 苏州科瓴精密机械科技有限公司 Cam chamber of four-stroke engine

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
JPS5696108A (en) * 1979-12-27 1981-08-04 Yamaha Motor Co Ltd Crankcase in internal combustion engine
JPS6341614A (en) * 1986-08-08 1988-02-22 Kawasaki Heavy Ind Ltd Lubricating device for overhead valve engine
TW487770B (en) * 1995-12-15 2002-05-21 Honda Motor Co Ltd Lubricating system in a 4-stroke engine
JP3244435B2 (en) * 1996-09-05 2002-01-07 株式会社共立 4-cycle internal combustion engine
CN2649780Y (en) * 2003-08-29 2004-10-20 胡济荣 Small-sized four-stroke general petrol engine with fog lubrication
JP2011038437A (en) * 2009-08-07 2011-02-24 Suzuki Motor Corp Internal combustion engine
CN103047043A (en) * 2013-01-22 2013-04-17 苏州科瓴精密机械科技有限公司 Cam chamber of four-stroke engine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6213079B1 (en) * 1998-06-03 2001-04-10 Fuji Robin Kabushiki Kaisha Lubricating apparatus for four-cycle engines
EP1267055A1 (en) * 1999-01-25 2002-12-18 BRIGGS & STRATTON CORPORATION Four-stroke internal combustion engine
JP2002339715A (en) * 2001-05-14 2002-11-27 Ishikawajima Shibaura Mach Co Ltd Lubricating device of four-cycle engine
CN1483923A (en) * 2002-09-20 2004-03-24 重庆宗申技术开发研究有限公司 Pordable four-stroke gasoline engine
US7584736B2 (en) * 2007-10-03 2009-09-08 Industrial Technology Research Institue Lubrication device of four-stroke engines
CN101413412A (en) * 2007-10-16 2009-04-22 财团法人工业技术研究院 Lubrication apparatus of four-stroke engine
WO2010011163A1 (en) * 2008-07-22 2010-01-28 Husqvarna Ab A lubrication device in a four-stroke engine
CN203130280U (en) * 2013-01-22 2013-08-14 苏州科瓴精密机械科技有限公司 Cam chamber of four-stroke engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014114214A1 (en) * 2013-01-22 2014-07-31 苏州科瓴精密机械科技有限公司 Cam chamber of four-stroke engine

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Application publication date: 20130417