CN101813015B - Gasoline engine lubricating structure - Google Patents
Gasoline engine lubricating structure Download PDFInfo
- Publication number
- CN101813015B CN101813015B CN2010101177208A CN201010117720A CN101813015B CN 101813015 B CN101813015 B CN 101813015B CN 2010101177208 A CN2010101177208 A CN 2010101177208A CN 201010117720 A CN201010117720 A CN 201010117720A CN 101813015 B CN101813015 B CN 101813015B
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- Prior art keywords
- chamber
- oil
- crank
- oil guide
- guide road
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- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a gasoline engine lubricating structure. Upper and lower crankshaft cases are combined to form a crank chamber, an engine oil chamber and a crankshaft gear chamber; the engine oil chamber is positioned on the right side of the crank chamber and communicated with the crank chamber through a first oil guide passage on a right crank; the crankshaft gear chamber is positioned on the left side of the crank chamber; the bottom of the crankshaft gear chamber is provided with a small hole which is communicated with an oil return passage on the lower crankshaft case; a left crank is provided with a second oil guide passage of which the oil inlet is formed on the end face of the handle part of the left crank; the oil outlet of the second oil guide passage is formed on the outer circumferential surface of the shaft part of the left crank and can be communicated with the crankshaft gear chamber through a third oil guide passage on the lower crankshaft case. The structure can improve the flexibility and reliability for opening or closing the passage between the crank chamber and the crankshaft gear chamber, ensure the smoothness for circular flowing of the lubricating oil and have the characteristics of skillful design, simple structure, low reconstruction cost, good lubricating effect and the like.
Description
Technical field
The invention belongs to the general gasoline engines technical field, specifically, the particularly lubrication system of general gasoline engines.
Background technique
Form crank chamber, machine oil chamber and crankshaft gear chamber after the upper and lower crankcase body mould assembling of general gasoline engines, wherein the machine oil chamber is positioned at the right side of crank chamber, this machine oil chamber communicates with crank chamber by the first Oil Guide road of offering on the right crank, have the oilhole that is communicated with the crankshaft gear chamber in the bottom of crank chamber, block and valve block are housed in this oilhole, block and valve block play one-way valve, with guarantee lubricant oil from crank chamber to crankshaft gear chamber one-way flow.Described crankshaft gear chamber is positioned at the left side of crank chamber, the bottom of this crankshaft gear chamber has aperture and communicates with back oil road on the lower crankcase body, above the crankshaft gear chamber, be provided with the camshaft chamber that is communicated with it, the camshaft chamber communicates with the inner chamber of cylinder head by push-rod hole, gathering room on the cylinder head is communicated with back oil road by sluice way, and the outlet of back oil road is indoor at machine oil.When piston moves from top dead center toward lower dead center, the pressure of mist of oil increases in the crank chamber, and push valve block open, make the interior flow of lubricant of crank chamber to crankshaft gear chamber and camshaft chamber, sub-fraction flows to back oil road by aperture, another part flows into cylinder head by push-rod hole, flows to back oil road through gathering room and sluice way; When piston moved from lower dead center toward top dead center, valve block was closed, and formed negative pressure in the crank chamber, and lubricant oil sucks back the machine oil chamber by the backflow road, and the indoor oil of machine oil flows to crank chamber by the first Oil Guide road, thereby realized a lubricated circulation.
The one-way valve that the conventional gasoline machine adopts block and valve block to constitute is controlled the switching of oil circuit between crank chamber and the crankshaft gear chamber, because block and valve block are less, comparatively difficulty is installed, and can increase the work efficiency of assembling complete machine.Simultaneously, valve block is a steel disc, needs certain pressure just can open, and sensitivity and reliability are relatively poor, influence the unobstructed property that lubrication oil circulation flows easily, thereby has reduced the lubricated effect of complete machine.
Summary of the invention
The gasoline engine lubricating structure that provides a kind of lubrication effect good is provided technical problem to be solved by this invention.
Technological scheme of the present invention is as follows: a kind of gasoline engine lubricating structure, comprise upper crankcase body, lower crankcase body, left crank, right crank, connecting rod, piston and cylinder head, form crank chamber, machine oil chamber and crankshaft gear chamber after the wherein upper and lower crankcase body mould assembling, described machine oil chamber is positioned at the right side of crank chamber, and this machine oil chamber communicates with crank chamber by the first Oil Guide road of offering on the right crank; Described crankshaft gear chamber is positioned at the left side of crank chamber, the bottom of this crankshaft gear chamber has aperture and communicates with back oil road on the lower crankcase body, above the crankshaft gear chamber, be provided with the camshaft chamber that is communicated with it, the camshaft chamber communicates with the inner chamber of cylinder head by push-rod hole, gathering room on the cylinder head is communicated with back oil road by sluice way, its key is: have the second Oil Guide road on described left crank, the filler opening in this second Oil Guide road is at the end face of left crank shank, the oil outlet in the second Oil Guide road is on the outer peripheral surface of left crank axial region, and the oil outlet in the second Oil Guide road can communicate with the crankshaft gear chamber by the 3rd Oil Guide road of offering on the lower crankcase body.
The present invention has cancelled the oilhole between crank chamber and the crankshaft gear chamber on the basis of conventional construction, cancelled block and valve block simultaneously.On left crank, newly open the second Oil Guide road, newly open the 3rd Oil Guide road that matches with the second Oil Guide road on the lower crankcase body.Owing to can drive left and right sides crank rotation by connecting rod in the time of the piston acting, when the process that piston moves from top dead center toward lower dead center, the oil outlet that left side crank just in time turns to the second Oil Guide road communicates with the filler opening in the 3rd Oil Guide road, and the lubricant oil in the crank chamber flows to crankshaft gear chamber and camshaft chamber by the second Oil Guide road, the 3rd Oil Guide road like this; When piston moved from lower dead center toward top dead center, along with the rotation of left crank, the dislocation of the filler opening in the oil outlet in the second Oil Guide road and the 3rd Oil Guide road was automatically with the pathway closure between crank chamber and the crankshaft gear chamber.
The present invention substitutes traditional one-way valve by second Oil Guide road on the left crank and the 3rd Oil Guide road on the lower crankcase body, component have not only been reduced, assembling difficulty and cost have been reduced, and sensitivity, the good reliability of passage switching between control crank chamber and the crankshaft gear chamber, can ensure the unobstructed property that lubrication oil circulation flows, thereby effectively improve the lubricated effect of complete machine.
The diameter in the described second Oil Guide road is than the big 0.8～1.2mm of diameter in the first Oil Guide road, because in the process that piston down moves, the lubricant oil in the crank chamber also can flow to the first Oil Guide road except to the second Oil Guide road flows.Be provided with the diameter in the second Oil Guide road than the big 0.8～1.2mm in the first Oil Guide road, can not destroy the intensity of left crank on the one hand, on the other hand, can guarantee that the lubricant oil that flows to the second Oil Guide road is more.
For simplified structure, make things convenient for manufacturing, the described second Oil Guide road is
The shape hole, the filler opening in the second Oil Guide road is over against the oil outlet of the first Oil Guide road shank.
Described the 3rd Oil Guide road is the oil groove that is opened in lower crankcase body top.Oil groove can directly be used mould-forming, and without machining, processes more conveniently, and has saved cost; Oil groove can more directly directly join with the crankshaft gear chamber, can reduce the resistance that lubricant oil flows, and it is more smooth and easy that lubricant oil is flowed.
Beneficial effect: the present invention can improve the sensitivity and the reliability of passage switching between crank chamber and the crankshaft gear chamber, has ensured the unobstructed property that lubrication oil circulation flows, and has characteristics such as design is ingenious, simple in structure, reforming cost is low, lubrication effect is good.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the layout schematic representation of sluice way among the present invention and back oil road.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1 and Figure 2, the present invention is made of parts such as upper crankcase body 1, lower crankcase body 2, left crank 3, right crank 4, connecting rod 5, piston 6 and cylinder heads 7.Wherein upper crankcase body 1 spiral-lock is on lower crankcase body 2, at the top of upper crankcase body 1 cylinder head 7 is set, piston 6 is installed in the cylinder in the upper crankcase body 1, this piston 6 is connected by wrist pin with connecting rod 5, the other end of connecting rod 5 is between the shank of left and right crank 3,4, and be connected with left and right crank 3,4 by crank pin, and left and right crank 3,4 is separately by bearing and 1,2 supportings of upper and lower crankcase body.
From Fig. 1, Fig. 2 as can be known, form crank chamber 8, machine oil chamber 9 and crankshaft gear chamber 10 after upper and lower crankcase body 1,2 mould assembling, wherein crank chamber 8 is placed in the middle, and machine oil chamber 9 is positioned at the right side of crank chamber 8, and this machine oil chamber 9 communicates with crank chamber 8 by the first Oil Guide road of offering on the right crank 4 11.Described crankshaft gear chamber 10 is positioned at the left side of crank chamber 8, and the bottom of this crankshaft gear chamber 10 has aperture 12 and communicates with back oil road 13 on the lower crankcase body 2.Have the second Oil Guide road 18 on described left crank 3, this second Oil Guide road 18 is
The shape hole, diameter is than the big 0.8～1.2mm of diameter in the first Oil Guide road 11.The filler opening in the second Oil Guide road 18 is at the end face of left crank 3 shanks, and over against the oil outlet of the first Oil Guide road, 11 shanks, the oil outlet in the described second Oil Guide road 18 is on the outer peripheral surface of left crank 3 axial regions.On described lower crankcase body 2, have the 3rd Oil Guide road 19 that matches with the second Oil Guide road 18, the 3rd Oil Guide road 19 is for being opened in the oil groove at lower crankcase body top, the filler opening in the 3rd Oil Guide road 19 is at the end face of lower crankcase body 2, and over against the crank circumference at 18 oil outlet places, the second Oil Guide road, the oil outlet in the 3rd Oil Guide road 19 is on the inner left wall of crankshaft gear chamber 10.When left crank 3 turned to the several angle scope, the oil outlet in the second Oil Guide road 18 can communicate with crankshaft gear chamber 10 by the 3rd Oil Guide road 19; When left crank 3 turned over above angular range, the second Oil Guide road 18 did not communicate with the 3rd Oil Guide road 19.
From Fig. 1, Fig. 2 also as can be known, above crankshaft gear chamber 10, be provided with the camshaft chamber 14 that is communicated with it, camshaft chamber 14 communicates by the inner chamber of push-rod hole 15 with cylinder head 7, gathering room 16 on the cylinder head 7 is communicated with back oil road 13 by sluice way 17, and the outlet of back oil road 13 is in machine oil chamber 9.Among the present invention, the remaining part of crank chamber 8, machine oil chamber 9, crankshaft gear chamber 10, the first Oil Guide road 11, aperture 12, back oil road 13, camshaft chamber 14, push-rod hole 15, gathering room 16 and sluice way 17 and formation petrol engine is prior art, and its structure and arrangement are not done at this and given unnecessary details.
The present invention realizes that like this complete machine is lubricated: when the process that piston 6 moves from top dead center toward lower dead center, the pressure of mist of oil increases in the crank chamber 8, and just in time turning to the oil outlet in the second Oil Guide road 18, left crank 3 communicates with the filler opening in the 3rd Oil Guide road 19, lubricant oil part in the crank chamber 8 can enter the first Oil Guide road 11 like this, another part flows to the 3rd Oil Guide road 19 by the second Oil Guide road 18, enter crankshaft gear chamber 10 and camshaft chamber 14 by the 3rd Oil Guide road 19 again, sub-fraction lubricant oil in the crankshaft gear chamber 10 flows to back oil road 13 by aperture 12, another part flows into cylinder head 7 by push-rod hole 15, flows to back oil road 13 through gathering room 16 and sluice way 17; When piston 6 moves from lower dead center toward top dead center, rotation along with left crank 3, the filler opening dislocation in the oil outlet in the second Oil Guide road 18 and the 3rd Oil Guide road 19, automatically with the pathway closure between crank chamber 8 and the crankshaft gear chamber 10, negative pressure in the crank chamber 8 produces suction, lubricant oil sucks back machine oil chamber 9 by backflow road 13, and the oil in the machine oil chamber 9 flows to crank chamber 8 by the first Oil Guide road 11, thereby realizes a lubricated circulation.
Claims (4)
1. gasoline engine lubricating structure, comprise upper crankcase body (1), lower crankcase body (2), left crank (3), right crank (4), connecting rod (5), piston (6) and cylinder head (7), form crank chamber (8), machine oil chamber (9) and crankshaft gear chamber (10) after wherein upper and lower crankcase body (1, the 2) mould assembling, described machine oil chamber (9) is positioned at the right side of crank chamber (8), and this machine oil chamber (9) communicates with crank chamber (8) by the first Oil Guide road of offering on the right crank (4) (11); Described crankshaft gear chamber (10) is positioned at the left side of crank chamber (8), the bottom of this crankshaft gear chamber (10) has aperture (12) and communicates with back oil road (13) on the lower crankcase body (2), be provided with the camshaft chamber (14) that is communicated with it in the top of crankshaft gear chamber (10), camshaft chamber (14) communicates by the inner chamber of push-rod hole (15) with cylinder head (7), gathering room (16) on the cylinder head (7) is communicated with back oil road (13) by sluice way (17), it is characterized in that: on described left crank (3), have the second Oil Guide road (18), the filler opening in this second Oil Guide road (18) is at the end face of left crank (3) shank, the oil outlet in the second Oil Guide road (18) is on the outer peripheral surface of left crank (3) axial region, and the oil outlet in the second Oil Guide road (18) can communicate with crankshaft gear chamber (10) by the 3rd Oil Guide road of offering on the lower crankcase body (2) (19).
2. gasoline engine lubricating structure according to claim 1 is characterized in that: the diameter in the described second Oil Guide road (18) is than the big 0.8～1.2mm of diameter in the first Oil Guide road (11).
3. gasoline engine lubricating structure according to claim 1 and 2 is characterized in that: the described second Oil Guide road (18) is
The shape hole, the filler opening in the second Oil Guide road (18) is over against the oil outlet of first Oil Guide road (11) shank.
4. gasoline engine lubricating structure according to claim 1 is characterized in that: described the 3rd Oil Guide road (19) is for being opened in the oil groove at lower crankcase body (2) top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101177208A CN101813015B (en) | 2010-03-04 | 2010-03-04 | Gasoline engine lubricating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101177208A CN101813015B (en) | 2010-03-04 | 2010-03-04 | Gasoline engine lubricating structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101813015A CN101813015A (en) | 2010-08-25 |
| CN101813015B true CN101813015B (en) | 2011-09-28 |
Family
ID=42620364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101177208A Expired - Fee Related CN101813015B (en) | 2010-03-04 | 2010-03-04 | Gasoline engine lubricating structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101813015B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4926814A (en) * | 1989-07-12 | 1990-05-22 | Tecumseh Products Company | Crankcase breather and lubrication oil system for an internal combustion engine |
| TW487770B (en) * | 1995-12-15 | 2002-05-21 | Honda Motor Co Ltd | Lubricating system in a 4-stroke engine |
| TW370160U (en) * | 1998-12-31 | 1999-09-11 | Ind Tech Res Inst | 4-stroke engine lubrication system |
| DE602007003288D1 (en) * | 2006-09-29 | 2009-12-31 | Honda Motor Co Ltd | Oil passage structure |
| CN101413412B (en) * | 2007-10-16 | 2010-10-06 | 财团法人工业技术研究院 | Lubrication apparatus of four-stroke engine |
| CN201635792U (en) * | 2010-03-04 | 2010-11-17 | 力帆实业(集团)股份有限公司 | Lubricating system for general-purpose gasoline engine |
-
2010
- 2010-03-04 CN CN2010101177208A patent/CN101813015B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101813015A (en) | 2010-08-25 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20200304 |