CN213980911U - Motorcycle engine with oil-gas separation mechanism - Google Patents

Abstract

The utility model belongs to the technical field of the engine, specifically be a motorcycle engine with oil-gas separation mechanism, which comprises a housin, the inside of casing is rotated and is connected with the camshaft, the one end of camshaft is connected with driven gear in right time, driven gear in right time's middle part is provided with the first cavity with casing inner space intercommunication, the inside of camshaft is provided with the second cavity with first cavity intercommunication, driven gear in right time's one end rotation is kept away from to the camshaft is connected with the exhaust subassembly, the inside of exhaust subassembly forms the third cavity with second cavity intercommunication. This scheme has solved the problem that causes lubricating oil to run off easily among the prior art when the engine exhausts.

Description

Motorcycle engine with oil-gas separation mechanism

Technical Field

The utility model belongs to the technical field of the engine, specifically be a motorcycle engine with oil-gas separation mechanism.

Background

The lubricating oil for motorcycle engine has the main functions of lubricating and cooling various moving parts of the engine, such as gear, clutch, bearing, camshaft, etc., and is circularly used by the engine lubricating system. During the running process of the engine, a large amount of high-temperature and high-pressure air enters the engine box body from a gap between the piston and the cylinder body, so that a large amount of mixed oil gas is formed together with lubricating oil. If the mixed oil gas is directly discharged to the outside of the engine, the air can be polluted, and meanwhile, the lubricating oil of the engine can be lost, so that the lubrication and cooling of various parts of the engine are poor, and the service life of the engine is shortened. How to reduce the loss of lubricating oil of an engine is a problem to be solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motorcycle engine with oil-gas separation mechanism to cause the problem of lubricating oil loss easily when solving among the prior art engine exhaust.

In order to achieve the above object, the utility model discloses a basic scheme provides a motorcycle engine with oil-gas separation mechanism, which comprises a housin, the inside of casing is rotated and is connected with the camshaft, the one end of camshaft is connected with timing driven gear, timing driven gear's middle part is provided with the first cavity with casing inner space intercommunication, the inside of camshaft is provided with the second cavity with first cavity intercommunication, the camshaft keeps away from timing driven gear's one end and rotates and be connected with exhaust assembly, exhaust assembly's inside formation and the third cavity of second cavity intercommunication.

The principle and the beneficial effect of the basic scheme are as follows: by arranging the first cavity and the second cavity, after the mixed oil gas enters the first cavity, the timing driven gear drives the mixed oil gas to do centrifugal motion through the first cavity, so that the mixed oil gas is subjected to oil-gas separation; after the mixed oil gas enters the second cavity from the first cavity, the mixed oil gas does centrifugal motion again in the second cavity along with the rotation of the cam shaft, so that oil-gas separation is performed again, and finally the mixed oil gas is discharged to the outside of the engine through the third cavity. Therefore, the mixed oil gas can do centrifugal motion for many times in the discharging process, so that oil-gas separation is carried out for many times, the content of lubricating oil in the mixed oil gas is reduced, and the problem of lubricating oil loss caused by engine exhaust is effectively solved.

Further, the third cavity comprises a parallel section parallel to the length direction of the second cavity and a vertical section perpendicular to the length direction of the second cavity in sequence along the flowing direction of the gas. By adopting the arrangement, the phenomenon of sharp turning can occur when the mixed oil gas flows in the third cavity, so that oil drops in the mixed oil gas are collided on the inner wall of the third cavity and condensed, the effect of oil-gas separation again on the mixed oil gas is realized, and the oil-gas separation effect of the mixed oil gas is further improved.

Further, the cross-sectional area of the parallel section perpendicular to the gas flow direction is smaller than the cross-sectional area of the second cavity perpendicular to the gas flow direction. By adopting the arrangement, when the mixed oil gas enters the third cavity from the second cavity, the flow velocity is increased due to the reduction of the flow section, the speed of the mixed oil gas impacting the inner wall of the third cavity is increased, and the oil-gas separation effect of the third cavity is improved.

Further, the exhaust assembly comprises a vent valve and a vent pipe, the vent valve is rotatably connected with the cam shaft, and the cross section of the air inlet of the vent valve is smaller than the cross section of the second cavity perpendicular to the air flowing direction. By adopting the arrangement, the exhaust assembly has a simpler structure, is convenient to assemble and manufacture, and is beneficial to reducing the cost.

Furthermore, one side, far away from the camshaft, of the timing driven gear is connected with an oil-gas driving wheel, a through hole communicated with the first cavity is formed in the center of the oil-gas driving wheel, and driving blades are arranged on the oil-gas driving wheel along the circumferential direction of the through hole. By adopting the arrangement, the timing driven gear drives the oil-gas driving wheel to rotate together, so that the through hole of the oil-gas driving wheel generates airflow pressure towards the first cavity under the action of the driving blade, and the mixed oil-gas in the engine is favorably sucked into the first cavity for oil-gas separation. Meanwhile, oil drops in the mixed oil gas can be condensed on the driving blade by the rotating motion of the driving blade, and the effect of oil-gas separation of the mixed oil gas is realized.

Drawings

Fig. 1 is a schematic diagram of an embodiment of the motorcycle engine with the oil-gas separation mechanism of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: oil gas drive wheel 1, first cavity 2, timing driven gear 3, camshaft 4, second cavity 41, breather valve 5, parallel section 51, vertical section 52, sealed 6, casing 7, breather pipe 8.

The embodiment is basically as shown in the attached figure 1: a motorcycle engine with an oil-gas separation mechanism comprises a shell 7, wherein a camshaft 4 is rotatably connected inside the shell 7, a timing driven gear 3 is connected to the left end of the camshaft 4 through a bolt, and an oil-gas driving wheel 1 is connected to the left side of the timing driven gear 3 through a bolt. The center of oil gas drive wheel 1 is provided with the through-hole, and oil gas drive wheel 1 is last to be provided with six driving vane along the circumference of through-hole. The timing driven gear 3 is internally provided with a first cavity 2 communicated with the through hole. The camshaft 4 is provided with a second cavity 41 that communicates with the first cavity 2 in the axial direction. The mounting hole for mounting the bolt connected with the camshaft 4 on the timing driven gear 3 is set to be a kidney-shaped hole, so that a certain space is left in the mounting hole after the bolt is mounted, and oil drops in the first cavity 2 can enter a gap between the timing driven gear 3 and the camshaft 4 through the mounting hole and are thrown out. The right end of the camshaft 4 is rotatably connected with an exhaust assembly, in the embodiment, the exhaust assembly comprises a vent valve 5 and a vent pipe 8, and a third cavity communicated with the second cavity 41 is formed inside the vent valve 5 and the vent pipe 8; the vent valve 5 is rotatably connected with the camshaft 4, a sealing gasket 6 is arranged between the vent valve 5 and the housing 7, a parallel section 51 and a vertical section 52 are sequentially arranged in the vent valve 5 along the flow direction of the gas, the parallel section 51 is arranged in parallel with the length direction of the second cavity 41, the vertical section 52 is arranged in perpendicular to the length direction of the second cavity 41, and the section of the parallel section 51 perpendicular to the flow direction of the gas is smaller than the section of the second cavity 41 perpendicular to the flow direction of the gas. The oil droplets in the second cavity 41 can flow out through the gap between the camshaft 4 and the breather valve 5.

The specific implementation process is as follows: when the engine works, the camshaft 4 drives the timing driven gear 3 and the oil-gas driving wheel 1 to rotate, mixed oil gas in the engine shell 7 passes through the through hole when the oil-gas driving wheel 1 rotates and is guided into the first cavity 2, when the mixed oil gas flows through the oil-gas driving wheel 1, part of oil drops in the mixed oil gas can be condensed on the driving blade, and the mixed oil gas is thrown back to the inside of the engine shell 7 under the action of centrifugal force, so that the first oil-gas separation of the mixed oil gas is realized. After the mixed oil gas enters the first cavity 2, the mixed oil gas does centrifugal motion under the rotation action of the timing driven gear 3, so that part of oil drops in the mixed oil gas are condensed on the inner wall of the first cavity 2, and are thrown back into the engine shell 7 through a gap between the timing driven gear 3 and the camshaft 4, and secondary oil-gas separation of the mixed oil gas is realized. Thereby the mixed oil gas is behind the first cavity 2 entering second cavity 41, and the mixed oil gas is at second cavity 41 internal centrifugal motion under the high-speed rotatory effect of camshaft 4 to make partial oil drop in the mixed oil gas condense on the inner wall of second cavity 41, and throw back inside engine housing 7 from the clearance between camshaft 4 and breather valve 5, realize the third oil-gas separation to the mixed oil gas. The mixed oil gas finally enters the third cavity from the second cavity 41, and when the mixed oil gas enters the parallel section 51 of the vent valve 5, the flow speed of the mixed oil gas is increased due to the reduction of the cross section, so that the mixed oil gas quickly impacts the vertical section 52 of the third cavity, partial oil drops in the mixed oil gas are condensed on the inner wall of the third cavity, and fourth oil-gas separation of the mixed oil gas is realized. And finally discharged to the outside of the engine through the breather pipe 8. The mixed oil gas needs to be subjected to oil-gas separation for four times in the process of being discharged out of the engine, so that the content of lubricating oil in the mixed oil gas is greatly reduced, and the problem that the lubricating oil is easy to lose when the engine exhausts is solved.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims (5)

1. The utility model provides a motorcycle engine with oil-gas separation mechanism, includes the casing, the inside of casing rotates and is connected with the camshaft, the one end of camshaft is connected with timing driven gear, its characterized in that: the middle part of the timing driven gear is provided with a first cavity communicated with the inner space of the shell, a second cavity communicated with the first cavity is arranged inside the cam shaft, one end of the cam shaft, far away from the timing driven gear, is rotatably connected with an exhaust assembly, and a third cavity communicated with the second cavity is formed inside the exhaust assembly.

2. A motorcycle engine with an oil-gas separation mechanism according to claim 1, characterized in that: the third cavity comprises a parallel section parallel to the length direction of the second cavity and a vertical section vertical to the length direction of the second cavity in sequence along the flowing direction of the gas.

3. A motorcycle engine with an oil-gas separation mechanism according to claim 2, characterized in that: the cross-sectional area of the parallel section perpendicular to the gas flow direction is smaller than the cross-sectional area of the second cavity perpendicular to the gas flow direction.

4. A motorcycle engine with an oil-gas separation mechanism according to claim 3, characterized in that: the exhaust assembly comprises a vent valve and a vent pipe, the vent valve is rotatably connected with the cam shaft, and the cross section of an air inlet of the vent valve is smaller than the cross section of the second cavity perpendicular to the air flowing direction.

5. A motorcycle engine with an oil-gas separation mechanism according to claim 4, characterized in that: one side of the timing driven gear, which is far away from the camshaft, is connected with an oil-gas driving wheel, the center of the oil-gas driving wheel is provided with a through hole communicated with the first cavity, and the oil-gas driving wheel is provided with driving blades along the circumferential direction of the through hole.

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