CN105971724A - Horizontally-opposed cylindrical cam engine - Google Patents

Abstract

The invention relates to an internal combustion engine device, in particular to a power transmission system of the internal combustion engine, in particular to a horizontally opposed cylindrical cam engine. A horizontally opposed cylindrical cam engine, comprising a cylindrical cam, the contour lines of the left and right end surfaces of the cylindrical cam are horizontal curves, the center of the cylindrical cam is fixed with a power shaft; the left and right end surfaces of the cylindrical cam are respectively provided with four The piston of the push rod is provided with a roller at the bottom end of the piston push rod, and the roller moves along the contour line of the end surface of the cylindrical cam, and the linear reciprocating motion of the piston push rod is converted into the rotary motion of the cylindrical cam. The contour line is designed as a cosine curve, which will realize the continuous change of the roller acceleration curve, that is, the roller will not have a sudden impact when the roller is at the upper and lower dead centers. According to the characteristics of the cam itself, the linear motion of the roller will be converted into the rotary motion of the cam, so as to realize the power conversion from the reciprocating linear motion of the piston to the rotary motion. So there is good power output stability.

Description

horizontally opposed cylindrical cam engine

technical field

The invention relates to an internal combustion engine device, in particular to a power transmission system of the internal combustion engine, in particular to a horizontally opposed cylindrical cam engine.

Background technique

The internal combustion engine mixes fuel and air and burns it in its cylinder, and the heat energy released makes the cylinder generate high-temperature and high-pressure gas. The expansion of the gas pushes the piston to do work, and then the mechanical work is output through the push rod mechanism or other mechanisms to drive the driven machine to work.

At present, there are still many deficiencies in the internal combustion engine. First, there is a sudden change in the speed direction of the piston of the engine when it is at the top and bottom dead centers. Alternating side pressure seriously affects the service life of push rods and pistons; finally, the existing engine structure is cumbersome and bulky, making it difficult to convert it into a hybrid system.

Contents of the invention

In order to overcome the shortcomings of the existing internal combustion engine piston connecting rod mechanism, such as the sudden change in speed at the top and bottom dead centers, the alternating side pressure during operation, and the complicated structure and large size of the internal combustion engine, the present invention adopts a brand new internal combustion engine power transmission system. The system converts the linear reciprocating motion of the piston into rotary motion through the cam, overcomes the problem of sudden speed change by using the characteristics of the cam, and overcomes the problem of alternating side pressure by using the relative position design of the push rod and the cam.

A horizontally opposed cylindrical cam engine, comprising a horizontally placed cylindrical cam, the contour lines of the left and right end surfaces of the cylindrical cam are horizontally undulating curves, and a power shaft is fixed in the center of the cylindrical cam; 4 pistons with push rods, the bottom end of the piston push rods is provided with rollers, the rollers move along the contour line of the end face of the cylindrical cam, and the linear reciprocating motion of the piston push rods is converted into the rotary motion of the cylindrical cam.

Preferably, the four pistons on one side of the cylindrical cam are arranged symmetrically around the center of the cylindrical cam, and the rollers each have a quarter phase difference on the contour line of the end surface of the cylindrical cam.

Preferably, the pistons on both sides of the cylindrical cam are symmetrical to each other.

Preferably, the contour line of the upper end surface is a cosine curve.

Preferably, the contour lines of the two end surfaces of the cylindrical cam correspond to the same.

Preferably, the two end surfaces of the cylindrical cam are laterally undulating curved surfaces.

Preferably, the two end contours of the cylindrical cam are cosine curves.

Preferably, the two end surfaces of the cylindrical cam are the same curved surface.

Preferably, grooves are provided on the two end surface contours of the cylindrical cam, and the rollers are embedded in the grooves (the rollers exert tension and pressure on the cylindrical cam through the grooves).

A power shaft is fixed at the center of the two end faces of the cylindrical cam.

The technical solution adopted by the present invention to solve its technical problems is: the assembly of this horizontally opposed cylindrical cam engine includes 8 piston push rods and rollers at their bottom ends, cylindrical cam (cam rotor), power shaft (power shaft) of cylindrical cam Output shaft). The cam is placed horizontally, the four piston push rods are symmetrically placed on the left end of the cylindrical cam, and the four piston push rods are symmetrically placed on the right end of the cam. The cam is placed horizontally, and the piston-crank linkage mechanism is placed on the left and right sides of the cam. The working state of the left piston push rod group is two strokes later than that of the right piston push rod group, so as to realize the horizontally opposed power output. .

Like a traditional internal combustion engine, the combustion fuel in the cylinder pushes the piston and the push rod to move in a straight line left and right, and the roller at the bottom of the push rod moves up and down along with the push rod. The left and right end surfaces of the cam rotor are curved contour lines, and four rollers act on the contour lines. Each roller is one-quarter of a cycle out of contour from the adjacent roller. The contour line can be designed as a cosine curve, which will realize the continuous change of the roller acceleration curve, that is, the roller will not have a sudden impact when the roller is at the upper and lower dead centers. According to the characteristics of the cam itself, the linear motion of the roller will be converted into the rotary motion of the cam, so as to realize the power conversion from the reciprocating linear motion of the piston to the rotary motion.

The beneficial effect of the present invention is that the contour line of the end surface of the cylindrical cam will realize the continuous change of the acceleration curve of the roller, that is, the roller will not have abrupt impact when it is at the upper and lower dead centers. The cam rotor can be used as the flywheel of the traditional internal combustion engine, so the present invention saves the structure of the flywheel and reduces the volume of the engine. The cam not only serves as the flywheel, but also transmits things through the power shaft. The piston push rod is always kept on one side of the cam, so the load on the piston is not alternating side pressure but only tension pressure, so the life of the piston and push rod will be extended a lot. Because the four piston push rods are arranged symmetrically, and the four rollers are arranged with a difference of a quarter of a period, so there is good power output stability. Because of the horizontally opposed design, the overall dynamic force of the engine is balanced.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic structural view of the present invention.

In the figure 1. Piston, 2. Push rod, 3. Roller, 4. Cylindrical cam, 5. Power shaft

detailed description

A horizontally opposed cylindrical cam 4 engine, comprising a horizontally placed cylindrical cam 4, the contour lines of the left and right end surfaces of the cylindrical cam 4 are laterally undulating curves, and a power shaft 5 is fixed in the center of the cylindrical cam 4; the left and right sides of the cylindrical cam 4 Four pistons 1 with push rods 2 are respectively arranged on each end face, and the bottom end of said piston 1 push rod 2 is provided with a roller 3, and the roller 3 moves along the contour line of the cylindrical cam 4 end face, and the piston 1 push rod The linear reciprocating motion of 2 is converted into the rotary motion of cylindrical cam 4. The four pistons 1 on one side of the cylindrical cam 4 are symmetrically arranged around the center of the cylindrical cam 4, and the rollers 3 each have a quarter phase difference on the contour line of the end face of the cylindrical cam 4. The pistons 1 on both sides of the cylindrical cam 4 are symmetrical to each other. The contour line of the upper end surface is a cosine curve. The contour lines of the two end faces of the cylindrical cam 4 are correspondingly the same.

Preferably, the two end surfaces of the cylindrical cam 4 are curved surfaces that undulate up and down. The two end contours of the cylindrical cam 4 are cosine curves. The two end surfaces of the cylindrical cam 4 are the same curved surface.

Preferably, grooves are provided on the two end surface contour lines of the cylindrical cam 4, and the roller 3 is embedded in the groove (the roller 3 has tension and pressure on the cylindrical cam 4 through the groove).

A power shaft 5 is fixed at the center of both end faces of the cylindrical cam 4 .

In Fig. 1, the piston 1 pushes the push rod 2 to move in a straight line, and the work sequence of the four pistons on both sides is exactly the same as the four-stroke process of the traditional internal combustion engine. The working state of the left piston push rod group is two strokes later than the working state of the right piston push rod group, so as to realize the horizontally opposed power output. The roller 3 at the bottom end of the push rod 2 moves left and right together with the push rod, and pushes the cylindrical cam 4, so that the straight motion of the roller 3 will be converted into the rotary motion of the cam 4. The power shaft 5 on the cylindrical cam 4 rotates and outputs power.

Claims (10)

1. A horizontally opposed cylindrical cam engine, characterized in that: comprise a horizontally placed cylindrical cam, the contour lines of the left and right end surfaces of the cylindrical cam are laterally undulating curves, and the center of the cylindrical cam is fixed with a power shaft; the left and right sides of the cylindrical cam Four pistons with push rods are respectively arranged on each end surface, and the bottom end of the piston push rod is provided with a roller, which moves along the contour line of the end face of the cylindrical cam, and the linear reciprocating motion of the piston push rod is converted into a cylinder cam. rotation movement. 2. The horizontally opposed cylindrical cam engine according to claim 1, characterized in that: the four pistons on one side of the cylindrical cam are symmetrically arranged around the center of the cylindrical cam, and the rollers are different on the contour line of the end surface of the cylindrical cam. quarter phase. 3. The horizontally opposed cylindrical cam engine according to claim 1, wherein the pistons on both sides of the cylindrical cam are symmetrical to each other. 4. The horizontally opposed cylindrical cam engine according to claim 1, characterized in that: the contour line of the upper end surface is a cosine curve. 5. The horizontally opposed cylindrical cam engine according to claim 1, characterized in that: the contour lines of the two end surfaces of the cylindrical cam correspond to the same. 6. The horizontally opposed cylindrical cam engine according to claim 1, characterized in that: the two end surfaces of the cylindrical cam are horizontally undulating curved surfaces. 7. The horizontally opposed cylindrical cam engine according to claim 6, characterized in that: the contour lines of the two end faces of the cylindrical cam are cosine curves. 8. The horizontally opposed cylindrical cam engine according to claim 6 or 7, characterized in that: the two end surfaces of the cylindrical cam are the same curved surface. 9. The horizontally opposed cylindrical cam engine according to any one of claims 1-8, characterized in that grooves are provided on the contour lines of the two end faces of the cylindrical cam, and the rollers are embedded in the grooves. 10. The horizontally opposed cylindrical cam engine according to any one of claims 1-8, wherein a power shaft is fixed at the center of both end faces of the cylindrical cam.