JPS599721B2 - reciprocating engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine, and particularly to a reciprocating engine that eliminates the need for a connecting rod.

Conventional engines have a mechanism in which the movement of the piston, which moves up and down due to the explosion in the combustion chamber, is transmitted to the crankshaft through the connecting rod, but the engine itself is very large compared to the combustion chamber, and the engine We have almost reached our limits in terms of miniaturization, weight reduction, high output, etc.

Furthermore, the relationship between the momentum of the piston and the momentum of the crankshaft was not constant.

Conventionally, therefore, a heavy flywheel was attached to the crankshaft to ensure smooth rotation, which increased weight and wasted energy.

Furthermore, when making pistons horizontally multi-cylinder, a crankshaft is inevitably used, so there are various problems such as having to shift the position of the cylinders, but the drawback is that the basics have not been touched. was there.

This invention solves the fateful problem of converting the vertical movement of a piston into rotational movement, thereby achieving miniaturization, weight reduction, reduction in generated vibration, high output, and cost reduction through a simple mechanism. A rotary body that has a circular hole in a connecting body connected to a piston housed in at least one cylinder so as to be movable up and down, and that is rotatably fitted into the circular hole via a bearing. an eccentric hole is formed in the rotating body, a protrusion is provided on one side of the rotating body, and an eccentric ring formed on the shaft is rotatably fitted into the eccentric hole,
The present invention is characterized in that an idling prevention plate, which is loosely inserted into the shaft, is attached to the cylinder block, and an arcuate portion is provided in front of the idling prevention plate so as to be in contact with the elliptical trajectory of the protrusion.

An embodiment of the present invention will be described with reference to the drawings. Reference numerals 1 and 2 are a pair of pistons, which are opposed and connected together by a connecting body 3 to form a piston body 9.

A circular hole 4 is formed in this connecting body, and a first locking portion 5 is provided at one end of the circular hole 4 so as to protrude toward the center.

Further, slide portions 6, 6 are provided on both outer surfaces of this connecting body, respectively.
has been formed.

41. Reference numeral 42 denotes cylinders provided vertically and oppositely in the cylinder block 40, and the pistons 1 and 2 are accommodated in the cylinders so as to be able to move up and down.

Reference numerals 7 and 8 indicate piston rings each attached to an appropriate number around the outer periphery of the piston.

43 indicates both cylinders 41. 42, and the slide portions 6, 6 are slidably in contact with both side walls 44, 44 of this working chamber 43, and when the piston moves up and down, the piston body 9 vibrates left and right. It prevents you from doing so.

Reference numeral 11 denotes a rotating body rotatably housed in the circular hole 4 via a bearing 50, and an eccentric hole 12 is provided eccentrically inside this rotating body.

A second end projecting in the circumferential direction is provided at one end of the outer periphery of the rotating body 11.
A third locking portion 14 is formed on the inner surface of the other end of the eccentric hole 12, that is, on the opposite side of the second locking portion 13.
is provided.

An eccentric ring 21 that is rotatably fitted into the eccentric hole 12 via a bearing 51 is integrally formed at approximately one end of the shaft 20, and a fourth eccentric ring 21 that protrudes in the circumferential direction is formed at one end of the outer periphery of the eccentric ring 21. A locking portion 22 is formed.

The eccentric ring 21 provided on the shaft 20 is composed of a protruding portion that protrudes outward from the outer diameter of the shaft, and a recessed portion 24 that bites inward from the outer diameter of the shaft. The recessed portion 24 is formed to be longer than the thickness of the eccentric ring 21 in the longitudinal direction of the shaft 20.

Reference numeral 30 designates an idling prevention plate located within the working chamber 43, inserted through the shaft 20, and positioned close to the eccentric wheel 21 on one side of the recessed portion 24.

That is, when the eccentric wheel 21 is located at the intermediate point as shown in FIG. 11.13, the eccentric wheel 21 and the rotating body 11 rotate in the same direction and begin to idle. A protrusion 15 is provided on the back surface of the prevention plate 30 and the rotating body 11.

That is, when the rotating body 11 and the eccentric wheel 21 are rotating normally (
(the rotating direction of the rotating body and the eccentric wheel are opposite to each other), the projection 1
5 draws an elliptical orbit 60 as shown by the two-dot chain line in FIG.

Therefore, arcuate portions 3L are provided at the top and bottom of the front of the slip prevention plate 30.
Since this protrusion 15 does not come into contact with 31, the protrusion 1
5 continues to draw an elliptical orbit smoothly.

However, when the rotating body 11 and the eccentric wheel 21 idle (the rotating direction of the rotating body and the eccentric wheel are the same), the protrusion 15 draws a circular orbit 61 as shown by the dashed line in FIG.

Therefore, the protrusion 15 abuts against the arcuate portions 31 and 31 and is temporarily stopped.
It will return to .

The hole 33 provided in the center of this slip prevention plate 30 is connected to the shaft 2.
This is for inserting 0.

When the compressed fuel in the cylinder 41 is exploded by a known ignition means such as a spark plug or a fuel injection pump (not shown) (FIG. 10), the pistons 1 and 2 are integrally connected. The rest 3 descends, and the rotating body 11 rotates counterclockwise while rotating the eccentric ring 21 fitted in the eccentric hole 12 clockwise, thereby rotating the shaft 20 clockwise.

In this case, as the upper piston 1 approaches the bottom dead center,
The lower piston 2 approaches top dead center, i.e. nears the end of the compression stroke (FIG. 12), and then the compressed fuel in the cylinder 42 explodes and the pistons 1, 2 and the integral coupling body 3 again The rotating body is raised to transmit clockwise rotational force to the shaft 20 via the eccentric hole 12 of the rotating body and the eccentric wheel 21.

In this case, as described above, since the sliding parts 6, 6 provided on both sides of the connecting body 3 slide while contacting the both side walls 44, 44 in the working chamber 43, the sliding of the connecting body 3 in the left-right direction This prevents vibrations from occurring, thereby preventing vibrations from being transmitted to the shaft 20.

Incidentally, when both the upper and lower pistons are located at the intermediate positions in FIG. 11.13, the center line of the outer periphery of the rotating body 11 and the center line of the shaft 20 integral with the eccentric ring 21 must be the same.

Further, if the distance between the center of the shaft 20 and the maximum outer diameter of the eccentric ring 21 is a, and the distance between the center of the shaft and the minimum outer diameter of the eccentric ring, that is, the recessed part 24 is b, then the stroke is (a
-b) It is expressed as X2, and in order to make the stroke of this eccentric wheel as large as possible, the value of (a-b) should be increased.

This invention can be applied to both gasoline engines and diesel engines, and can also be applied to 2-stroke and 4-stroke engines.

Furthermore, if the pistons housed in the upper and lower cylinders are integrally formed by a connecting body, they will explode alternately when the piston bodies move up and down, resulting in a high output.

As described above, the present invention directly converts the vertical motion of the piston into rotational motion through the eccentric hole of the rotating body and the eccentric wheel integrated with the shaft, so there is little energy loss, the entire engine is downsized, and it is possible to prevent idling. Since a gear mechanism that requires high processing accuracy is not provided, output loss can be prevented, and as a result, the weight of the engine can be reduced.

[Brief explanation of drawings]

Figure 1 is a partially broken sectional view of the main part, Figure 2 is a front view of the piston body, Figure 3 is a front view of the rotating body, and Figure 4 is Figure 3A.
-A sectional view, FIG. 5 is a front view of the slip prevention plate, FIG. 6 is a sectional view taken along the line B-B in FIG. 9 is a sectional view taken along the line D-D in FIG. 7, and FIGS. 10, 11, 12 and 13 are sectional views showing the operating state of the present device. 1, 1' are pistons, 3, 3' are connecting bodies, 4, 4' are circular holes, 11.11' are rotating bodies, 12.12' are eccentric holes, 2
0.20' is a shaft, 21.21' is an eccentric ring, 30 is an anti-slip plate, 31 is an arc-shaped portion, and 41.41' is a cylinder.

Claims (1)

[Claims] 1 A large-diameter circular hole 4 provided at the center of a connecting body 3 that integrally connects a pair of pistons 1 and 2 that are housed in a pair of upper and lower cylinders 41 and 42 provided in the cylinder block 40 so as to be able to move up and down, respectively. A first locking part 5 is provided protrudingly on the inner surface of one end, and slide parts 6, 6 are provided on both sides of the connecting body 3 to slidably contact the inner wall of the cylinder cylinder tube. A second locking portion 13 that pairs with the first locking portion 5 and prevents the bearing 50 from coming off on the outer surface of one end of the rotating body 11 that is rotatably fitted through a large number of bearings 50.
A third locking part 14 is provided on the inner surface of the eccentric hole 12 provided in the rotating body 11 at the end opposite to the second locking part 13, and a protrusion 15 for preventing slippage is provided on one side of the rotating body. The eccentric ring 21 formed on the shaft 20 is inserted into the eccentric hole 12.
It is rotatably fitted inside via a large number of bearings 51,
A fourth locking portion 2 is provided on the outer periphery of one end of the eccentric ring 21 and forms a pair with the third locking portion 14 to prevent the bearing 51 from slipping out.
2, an idle rotation prevention plate 30 that is loosely inserted into the shaft is attached to the cylinder block 40, and upper and lower arcuate portions 31, 31 that are in contact with the elliptical orbit of the projection 15 are provided on the idle rotation prevention plate 30. A reciprocating engine.