CN209855868U - Gas distribution system of gasoline engine - Google Patents
Gas distribution system of gasoline engine Download PDFInfo
- Publication number
- CN209855868U CN209855868U CN201822200476.6U CN201822200476U CN209855868U CN 209855868 U CN209855868 U CN 209855868U CN 201822200476 U CN201822200476 U CN 201822200476U CN 209855868 U CN209855868 U CN 209855868U
- Authority
- CN
- China
- Prior art keywords
- cam
- rocker arm
- distribution system
- gasoline engine
- radius
- 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.)
- Active
Links
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model provides a gas distribution system of gasoline engine, includes upper rocker arm, lower rocking arm, exhaust valve, (air) intake valve, cam and camshaft, the camshaft is connected with the cam, the cam is connected with lower rocking arm, lower rocking arm is connected with upper rocker arm, upper rocker arm is connected with exhaust valve and (air) intake valve respectively, the radius of the base circle of cam is 9-10mm, the radius of the eccentric circle of cam is 5.6-6.6mm, through the tangent connection of the trajectory line that the radius is 154.5-155.5mm between base circle and the eccentric circle, the radius of the face of being connected of lower rocking arm and cam profile connection is 19.5-20.5mm, the utility model discloses a cam and the size of lower rocking arm can make the gas distribution system of engine can be scientific distribute gas, reduce the oil consumption of engine.
Description
Technical Field
The utility model relates to a gas distribution system of gasoline engine.
Background
The small four-stroke gasoline engine has one reasonable and practical gas distributing system, and the shape and installation position of the cam and the rocker arm determine the gas distributing state of the gasoline engine directly.
Disclosure of Invention
Through a large amount of experiments and optimization, the utility model aims to solve the technical problem that a gas distribution system of gasoline engine is provided for improve the rationality of distribution.
In order to solve the technical problems, the utility model adopts the technical proposal that,
a gas distribution system of a gasoline engine comprises an upper rocker arm, a lower rocker arm, an exhaust valve, an intake valve, a cam and a crankshaft, wherein the crankshaft is connected with the cam, the cam is connected with the lower rocker arm, the lower rocker arm is connected with the upper rocker arm through a valve push rod, the upper rocker arm is respectively connected with the exhaust valve and the intake valve, the radius of a base circle of the cam is 9-10mm, the radius of a convex arc of the cam is 5.6-6.6mm, the base circle and the convex circle are in tangent connection through an abdominal arc with the radius of 154.5-155.5mm, and the radius of a connection surface of the lower rocker arm, which is connected with the contour of the cam, is 19.5.
When adopting above technical scheme, the utility model discloses still further adopt or make up and adopted following technical scheme.
The lower rocker arm comprises two rocker arm components with the same structure, each rocker arm component comprises a rocker arm mounting hole, a valve push rod mounting groove and a cam connecting wall, the rocker arm mounting holes are rotatably mounted on the lower rocker arm shaft, the valve push rod mounting grooves are connected with the upper rocker arm through valve push rods, the cam connecting wall is connected with a cam, and the radius of the outer side of the cam connecting wall is 19.5-20.5 mm.
The horizontal distance between the circle center of the cam connecting wall and the circle center of the rocker arm mounting hole is 21.7mm, and the vertical distance between the circle center of the cam connecting wall and the circle center of the rocker arm mounting hole is 9 mm.
The horizontal distance between the rocker arm mounting hole and the valve push rod mounting groove is 13.5mm-14.5 mm.
The rocker arm mounting hole and the valve push rod mounting groove are fixedly connected at two ends of the first connecting rod, and a second connecting rod is fixedly connected between the valve push rod mounting groove and the cam connecting wall.
The second connecting rod is obliquely arranged relative to the vertical line, and the included angle between the second connecting rod and the vertical line is 9-15 degrees.
The cam connecting wall comprises a cam connecting section and an excessive connecting section, one end of the excessive connecting section is connected with the rocker arm mounting hole, and the other end of the excessive connecting section is connected with the cam connecting section.
The thickness of first connecting rod, rocking arm mounting hole and transition linkage is 3.3mm, and the thickness of valve push rod mounting groove, cam linkage segment and second connecting rod is 7 mm.
The transmission ratio between the cam and the crankshaft is 1: 2.
The vertical distance between the cam connecting wall and the rocker arm mounting hole is 27.5 mm.
The utility model has the advantages that,
(1) the utility model discloses the size of cam and lower rocking arm can be so that the gas distribution system of engine can be scientific distribute, reduce the oil consumption of engine, and the boost power optimizes the emission.
(2) The lower rocker arm is formed by combining two identical rocker arm assemblies, only one rocker arm assembly is required to be produced, the production cost is reduced, the transfer difficulty is effectively reduced, and the production efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic structural view of the rocker arm assembly.
FIG. 3 is a top view of the rocker arm assembly.
Fig. 4 is a cross-sectional view of the cam.
Reference numerals: the engine comprises an upper rocker arm 1, a lower rocker arm 2, an exhaust valve 3, an intake valve 4, a cam 5, a crankshaft 6, a rocker arm assembly 7, a rocker arm mounting hole 8, a valve push rod mounting groove 9, a cam connecting wall 10, a mounting shaft 11, a cam connecting section 12, an excessive connecting section 13, a first connecting rod 14, a second connecting rod 15, a valve push rod mounting socket 16, a cam body 17, a driven gear 18 and a driving gear 19.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
A gas distribution system of a gasoline engine comprises an upper rocker arm 1, a lower rocker arm 2, an exhaust valve 3, an intake valve 4, a cam 5 and a crankshaft 6, wherein the crankshaft 6 is connected with the cam 5, the cam 5 is connected with the lower rocker arm 2, the lower rocker arm 2 is connected with the upper rocker arm 1 through a valve push rod, the upper rocker arm 1 is respectively connected with the exhaust valve 3 and the intake valve 4, the radius of a base circle of the cam 5 is 9-10mm, the radius of a convex circle of the cam 5 is 5.6-6.6mm, the base circle and the convex circle are in tangent connection through an abdominal arc with the radius of 154.5-155.5mm, and the radius of a connection surface of the lower rocker arm 2 and the cam 5 in contour connection is 19.5-20.5 mm.
In some preferred modes, the radius of a cam base circle is 9.5mm, the radius of an eccentric circle of the cam is 6.1mm, the base circle and the eccentric circle are connected in a tangent mode through a track line with the radius of 155mm, and the radius of a connecting surface of the lower rocker arm 2 connected with the cam 5 in a contour mode is 20 mm.
The lower rocker arm 2 comprises two rocker arm assemblies 7 with the same structure, each rocker arm assembly 7 comprises a rocker arm mounting hole 8, a valve push rod mounting groove 9 and a cam connecting wall 10, the rocker arm mounting holes 8 are rotatably mounted on a mounting shaft 11, the valve push rod mounting grooves 9 are connected with the upper rocker arm 1, the cam connecting walls 10 are connected with the cam 5, and the outer radius of the cam connecting walls 10 is 19.5-20.5 mm.
The horizontal distance between the circle center of the cam connecting wall 10 and the circle center of the rocker arm mounting hole 8 is 21.7mm, and the vertical distance between the circle center of the cam connecting wall 10 and the circle center of the rocker arm mounting hole 8 is 9 mm.
The horizontal distance between the rocker arm mounting hole 8 and the valve push rod mounting groove 9 is 13.5mm-14.5mm, and in some preferred modes, the horizontal distance between the rocker arm mounting hole 8 and the valve push rod mounting groove 9 is 14 mm.
The rocker arm mounting hole 8 and the valve push rod mounting groove 9 are fixedly connected to both ends of a first connecting rod 14, and a second connecting rod 15 is fixedly connected between the valve push rod mounting groove 9 and the cam connecting wall 10.
The second connecting rod 15 is obliquely arranged relative to the vertical line, the included angle between the second connecting rod 15 and the vertical line is 9-15 degrees, in some preferred modes, one end of the second connecting rod 15 is connected to the lower end of the valve push rod mounting groove 9, the other end of the second connecting rod 15 is connected to the middle of the cam connecting section 12, and preferably, a valve push rod mounting socket 16 is arranged in the valve push rod mounting groove 9.
The cam connecting wall 10 comprises a cam connecting section 12 and a transition connecting section 13, one end of the transition connecting section 13 is connected with the rocker arm mounting hole 8, and the other end of the transition connecting section 13 is connected with the cam connecting section 12.
The thicknesses of the first connecting rod 14, the rocker arm mounting hole 8 and the transition connecting section 13 are 3.3mm, and the thicknesses of the valve push rod mounting groove 9, the cam connecting section 12 and the second connecting rod 15 are 7 mm.
The transmission ratio between the cam 5 and the crankshaft 6 is 1:2, the crankshaft 6 rotates for two circles, the corresponding cam 5 rotates for one circle, the corresponding exhaust valve 3 and the corresponding intake valve 4 are opened once when the cam rotates for one circle 6, and a gas distribution process is completed.
The vertical distance between the cam connecting wall 10 and the rocker arm mounting hole 8 is 27.5 mm.
The cam 5 comprises a cam body 17 and a driven gear 18, the cam body 17 is fixedly sleeved outside the driven gear 18, a driving gear 19 is fixedly installed on the crankshaft 6, and the driven gear 18 is meshed with the driving gear 19.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the terms corresponding to the reference numerals in the figures are used more herein, the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.
Claims (10)
1. A gas distribution system of a gasoline engine comprises an upper rocker arm (1), a lower rocker arm (2), an exhaust valve (3), an intake valve (4), a cam (5) and a crankshaft (6), wherein the crankshaft (6) is connected with the cam (5), the cam (5) is connected with the lower rocker arm (2), the lower rocker arm (2) is connected with the upper rocker arm (1) through a valve push rod, the upper rocker arm (1) is respectively connected with the exhaust valve (3) and the intake valve (4), and the gas distribution system is characterized in that the radius of a base circle of the cam (5) is 9-10mm, the radius of a convex arc of the cam (5) is 5.6-6.6mm, the base circle and the convex arc are in tangent connection through an abdominal arc with the radius of 154.5-155.5mm, and the radius of a connection surface of the lower rocker arm (2) and the contour of the cam (5) is 19.5-20..
2. The gas distribution system of the gasoline engine according to claim 1, wherein the lower rocker arm (2) comprises two rocker arms (7) with the same structure, the rocker arms (7) comprise rocker arm mounting holes (8), valve push rod mounting grooves (9) and cam connecting walls (10), the rocker arm mounting holes (8) are rotatably mounted on a lower rocker arm shaft (11), the valve push rod mounting grooves (9) are connected with the upper rocker arm (1) through valve push rods, the cam connecting walls (10) are connected with the cam (5), and the outer radius of the cam connecting walls (10) is 19.5-20.5 mm.
3. The gas distribution system of the gasoline engine according to claim 2, wherein the horizontal distance between the center of the cam connecting wall (10) and the center of the rocker arm mounting hole (8) is 21.7mm, and the vertical distance between the center of the cam connecting wall (10) and the center of the rocker arm mounting hole (8) is 9 mm.
4. The air distribution system of the gasoline engine according to claim 2, characterized in that the horizontal distance between the rocker arm mounting hole (8) and the valve push rod mounting groove (9) is 13.5mm-14.5 mm.
5. The air distribution system of the gasoline engine according to claim 2, characterized in that the rocker arm mounting hole (8) and the valve push rod mounting groove (9) are fixedly connected to both ends of the first connecting rod (14), and a second connecting rod (15) is fixedly connected between the valve push rod mounting groove (9) and the cam connecting wall (10).
6. Air distribution system for a gasoline engine according to claim 5, characterised in that the second connecting rod (15) is arranged tangentially to the vertical, the angle between the second connecting rod (15) and the vertical being 9-15 °.
7. The air distribution system of the gasoline engine according to claim 6, wherein the cam connecting wall (10) comprises a cam connecting section (12) and a transition connecting section (13), one end of the transition connecting section (13) is connected with the rocker arm mounting hole (8), and the other end of the transition connecting section (13) is connected with the cam connecting section (12).
8. The air distribution system of the gasoline engine according to claim 7, characterized in that the thickness of the first connecting rod (14), the rocker arm mounting hole (8) and the transition connecting section (13) is 3.3mm, and the thickness of the valve push rod mounting groove (9), the cam connecting section (12) and the second connecting rod (15) is 7 mm.
9. The air distribution system of the gasoline engine according to claim 1, characterized in that the transmission ratio between the cam (5) and the crankshaft (6) is 1: 2.
10. The air distribution system of the gasoline engine according to claim 2, characterized in that the vertical distance between the cam connecting wall (10) and the rocker arm mounting hole (8) is 27.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822200476.6U CN209855868U (en) | 2018-12-26 | 2018-12-26 | Gas distribution system of gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822200476.6U CN209855868U (en) | 2018-12-26 | 2018-12-26 | Gas distribution system of gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209855868U true CN209855868U (en) | 2019-12-27 |
Family
ID=68929302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822200476.6U Active CN209855868U (en) | 2018-12-26 | 2018-12-26 | Gas distribution system of gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209855868U (en) |
-
2018
- 2018-12-26 CN CN201822200476.6U patent/CN209855868U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209855868U (en) | Gas distribution system of gasoline engine | |
| CN101705862B (en) | Arc cylinder internal-combustion engine | |
| CN102619583A (en) | Concave-convex wheel rocker arm type valve distribution mechanism and matched internal combustion engine | |
| CN110259569A (en) | Port injection type supercharging gasoline engine efficient burning room | |
| CN215979656U (en) | In-line plunger sleeve and high-pressure variable oil injection pump for common rail system | |
| CN204152573U (en) | A kind of novel twin cylinder engine distribution device | |
| CN206360741U (en) | A kind of intake and exhaust rocking arm | |
| CN2911193Y (en) | Valve control gear of engine | |
| CN2908795Y (en) | Anti-channeling mechanism of camshaft | |
| CN201065775Y (en) | Four-stroke single cylinder chain jogger optimized combination motorcycle gasoline engine | |
| CN103850790B (en) | Without dead point reciprocating internal combustion engine | |
| CN201535182U (en) | Diesel engine cam shaft | |
| CN201546812U (en) | Internal-combustion engine of arc-shaped cylinder | |
| CN207660656U (en) | A kind of admission cam of supercharged direct-injection engine | |
| CN200978688Y (en) | Lower cam shaft type motorcycle engine valve train | |
| CN2837518Y (en) | Motorcycle engine cam valve train | |
| CN203742695U (en) | Valve-stroke-variable mechanism | |
| CN203035279U (en) | Air distributing device of engine | |
| CN204627745U (en) | Efficient and energy-saving IC engine master device structure | |
| CN205744033U (en) | A kind of single air valve engine | |
| CN201246197Y (en) | Four-stroke single-cylinder integrative motorcycle petrol engine | |
| CN103850744A (en) | Variable valve lift mechanism | |
| CN203730130U (en) | Dead point-free reciprocating internal combustion engine | |
| CN207660655U (en) | A kind of exhaust cam of supercharged direct-injection engine | |
| CN216642232U (en) | Four-valve ejector rod type valve mechanism for motorcycle engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |