CN203130280U - Cam chamber of four-stroke engine - Google Patents

Cam chamber of four-stroke engine Download PDF

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Publication number
CN203130280U
CN203130280U CN 201320031520 CN201320031520U CN203130280U CN 203130280 U CN203130280 U CN 203130280U CN 201320031520 CN201320031520 CN 201320031520 CN 201320031520 U CN201320031520 U CN 201320031520U CN 203130280 U CN203130280 U CN 203130280U
Authority
CN
China
Prior art keywords
cam chamber
stroke engine
cam
chamber
flash
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.)
Expired - Fee Related
Application number
CN 201320031520
Other languages
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 CN 201320031520 priority Critical patent/CN203130280U/en
Application granted granted Critical
Publication of CN203130280U publication Critical patent/CN203130280U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a cam chamber of a four-stroke engine. The cam chamber of the four-stroke engine is provided with a bottom and a backflow groove, wherein a smooth flat surface is arranged on the bottom, lubricating oil in the cam chamber can be smoothly guided into the backflow groove through the flat surface, and then the lubricating oil is prevented from remaining in the cam chamber. Therefore, the utilization rate of the lubricating oil in the cam chamber is improved.

Description

The cam chamber of four stroke engine
Technical field
The utility model relates to a kind of cam chamber of four stroke engine.
Background technique
At present, as the portable mowing machine (cut-off machine) and the backpack working machine that with the vegetation are object, 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, and this makes motor not too work when moving with the angle of inclination.The lubricated main design problem that becomes each motor manufacturer only has Honda company to be used for the four stroke engine of producing in batches that can work 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 wideer in this way, and heavier, cost is higher.The U. S. Patent of FUJIROBIN company has disclosed for US6213079 number in addition comparatively complicated oil line pipe on the motor, particularly cylinder block that has comparatively complicated lubrication system, make 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.
The model utility content
The purpose of this utility model is to provide a kind of cam chamber of improved four stroke engine at above-mentioned defective of the prior art, can improve the utilization ratio of the lubricant oil in it.
For realizing above-mentioned model utility purpose, the utility model 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 along sliding plane, and described plane can be guided to described back flash swimmingly with the lubricant oil in the described cam chamber.
In addition, the utility model also proposes following attached technological scheme:
Be directly to connect mutually 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, advantage of the present utility model is: the cam chamber of four stroke engine of the present utility model, the outer wall of recycling cylinder is not as the bottom surface, but at outer wall a bottom is set separately, and the bottom is provided with along sliding 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 the utility model preferred embodiment.
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 solutions of the utility model are done further nonrestrictive detailed description.
See figures.1.and.2, corresponding to the four stroke engine 10 of the utility model preferred embodiment, 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 machine members; 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 that produces 7 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 under the effect of negative pressure lubricant oil being sucked each component (not label) that lubricate in the crankshaft room 7 in it crankshaft room 7 in; Suck crankshaft room 7 by being arranged on the lubricant oil that way to cycle oil between crankshaft room 7 and the rocker arm chamber 1 will lubricate each component in 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 that produces in the crankshaft room 7 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 valve box 9 is simultaneously gone into cam chamber 5 lubricated cam mechanisms 52 by being arranged on valve box 9 with the orifice flow of 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 the open end of the vent passage that communicates with empty filter (not shown) on the Carburetor in addition in the central position of rocker arm chamber 1, this vent passage will produce in lubrication oil circulation blows gas leakage and drains into the open end of Carburetor entrance, and makes this blow gas leakage to enter 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 utility model, the cam chamber 5 not outer wall 102 of recycling cylinder 100 but arranges a bottom 54 at outer wall 102 separately as the bottom surface, and described bottom 54 is adjacent with described outer wall 102.This bottom 54 has along sliding plane 58 and back flash 56.Should be along between sliding plane 58 and the described back flash 56 being direct mutual the perforation, 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 and is positioned at described bottom 54 side walls 51, 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, the both sides of cam chamber 5 are offered notch part 500 respectively, so that the outer wall 102 of cylinder 100 has the wall thickness that waits roughly, thereby make that four stroke engine 10 can stable operation.
It is to be noted; above-mentioned preferred embodiment only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model spirit essence change or modify, and all should be encompassed within the protection domain of the present utility model.

Claims (8)

1. the cam chamber of a four stroke engine is provided with bottom and back flash, it is characterized in that: described bottom is provided with along sliding plane, and described plane can be guided to described back flash swimmingly with the lubricant oil in the described cam chamber.
2. according to the cam chamber of the described four stroke engine of claim 1, it is characterized in that: be directly perforation mutually between described plane and the described back flash.
3. according to the cam chamber of the described four stroke engine of claim 1, it is characterized in that: described four stroke engine also comprises the cylinder that is positioned at described cam chamber side, and described cylinder has circular outer wall.
4. according to the cam chamber of the described four stroke engine of claim 3, it is characterized in that: described bottom is adjacent with described outer wall.
5. according to the cam chamber of the described four stroke engine of claim 3, it 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. according to the cam chamber of the described four stroke engine of claim 1, it is characterized in that it also comprises the sidewall that is positioned at described two bottom sides.
7. according to the cam chamber of the described four stroke engine of 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 the cam chamber of each described four stroke engine of claim 1 to 7, it is characterized in that its inside also comprises gear and the cam mechanism that is positioned on the described bottom.
CN 201320031520 2013-01-22 2013-01-22 Cam chamber of four-stroke engine Expired - Fee Related CN203130280U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320031520 CN203130280U (en) 2013-01-22 2013-01-22 Cam chamber of four-stroke engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320031520 CN203130280U (en) 2013-01-22 2013-01-22 Cam chamber of four-stroke engine

Publications (1)

Publication Number Publication Date
CN203130280U true CN203130280U (en) 2013-08-14

Family

ID=48938270

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320031520 Expired - Fee Related CN203130280U (en) 2013-01-22 2013-01-22 Cam chamber of four-stroke engine

Country Status (1)

Country Link
CN (1) CN203130280U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130814

Termination date: 20170122

CF01 Termination of patent right due to non-payment of annual fee