JPS638288B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anti-slip device for a reciprocating engine that directly rotates the output shaft without the need for a connecting rod.

Conventional engines use connecting rods to convert reciprocating motion into rotary motion, which has the disadvantage that the engine body is larger than the combustion chamber. For this reason, they were miniaturized using the connecting rod as the key, and rotary motion was obtained by directly rotating an eccentric ring installed on the output shaft, but the output shaft sometimes slipped when converting reciprocating motion to rotary motion. The object of the present invention is to prevent the output shaft from idling and to obtain reliable rotational force.

An embodiment of the present invention will be described with reference to the drawings. A pair of pistons 1 and 2 are linearly opposed and connected by a connecting body 5 to form a piston body 10, and a circular hole 6 is formed in this connecting body. A first locking portion 7 is provided at one end of the circular hole 6 and projects toward the center. Furthermore, both outer surfaces of the connecting body 5 are formed thick to form sliding portions 8, 8, respectively, and cylinders 12, 8 are provided vertically and oppositely in the cylinder block 11.
A piston body 10 having the pistons 1 and 2 is housed in the piston 13 so as to be movable up and down. 16 and 15 are piston rings 1 each attached to the outer circumference of the piston.
Reference numeral 4 denotes a slightly wide working chamber located between both cylinders 12 and 13, and the slide portions 8 and 8 are slidably abutted against both side walls of the working chamber 14, so that when the piston moves up and down, This prevents the piston body 10 from vibrating left and right. 20 is the circular hole 6
It is a rotating body rotatably housed inside via a bearing 25, and an eccentric hole 21 is provided eccentrically. A second locking portion 22 is formed at one end of the outer periphery of the rotating body 20, and a third locking portion 22 is formed on the inner surface of the other end of the eccentric hole 21, that is, on the opposite side to the second locking portion 22. A locking portion 23 is provided.

An eccentric ring 31 that is rotatably fitted into the eccentric hole 21 via a bearing 26 is integrally formed at approximately one end of the output shaft 30, and at one end of the outer periphery of the eccentric ring 31, an eccentric ring 31 is formed that projects in the radial direction. A fourth locking portion 32 is formed. This eccentric ring 31 is composed of a protruding portion 40 that protrudes outward from the outer diameter of the output shaft 30 and a recessed portion 41 that bites inward from the outer diameter of the output shaft, making it easy to insert and remove the bearing. The recessed portion 41 is formed longer than the protruding portion 40 in order to make the recessed portion 41 more compact. The stroke due to the vertical movement of the piston body 10 is equal to the difference between the distance (A) from the center 0 of the output shaft to the outer end of the protruding portion 31 and the distance (B) from the center 0 of the output shaft to the recessed portion 41. .

35 is located in the working chamber 14 and connects the output shaft 3.
A reversal prevention cam integrally fixed to the piston 0 contacts projections 36 and 37 provided above and below, located on the center line passing through the centers of the pistons 1 and 2 and on opposing surfaces of the pistons 1 and 2. The maximum eccentricity of the eccentric ring 31 of the output shaft 30 and the maximum eccentricity of the reverse rotation prevention cam 35 are arranged at the same position.

When the compressed fuel supplied into the cylinder 12 is ignited and exploded (FIG. 4), the piston body 1 is rotated counterclockwise while the rotating body 20 is rotated counterclockwise.
0 is pressed down, and the eccentric wheel 31 integrated with the output shaft 30 located in the eccentric hole 21 of the rotating body is rotated clockwise, but the piston body 10 is located in the middle as shown in FIGS. In this case, the outer periphery of the rotating body 20 becomes a perfect circle with respect to the center of the output shaft 30, and there is a possibility that the rotating body 20 rotates together with the eccentric wheel 31, that is, it idles. That is, in FIGS. 5 and 7, the piston body 10 is located in the middle of the cylinder block 11, and the maximum eccentric portions of the rotating body and the eccentric ring 31 are located symmetrically in a straight line via the rod 30, so that the rotating body 20 may be in a state where it can rotate to either the left or right, causing it to idle and no longer generate torque. To prevent this, a reversal prevention cam 35 may be attached to the output shaft 30, and protrusions 36, 37 for regulating the reversal prevention cam 35 may be provided on the surfaces of the pistons 1, 2 facing each other.

To explain the operation when the reciprocating engine is equipped with the anti-reverse cam 35, in FIG. The piston body 10 engages with the attached protrusions 36 and 37.
When the rotor 20 starts to descend, the rotating body 20 rotates counterclockwise and the eccentric wheel 31 rotates clockwise, and as shown in FIG. , the rotating body 20 is an eccentric wheel 3
1 and try to rotate in the same direction. That is,
There may be a case where the output shaft 30 starts to idle, but in that case, the anti-reverse cam 35 attached to the output shaft 30, which is integrated with the eccentric wheel 31, stops when the protrusions 36, 37
Since the piston body 10 is lowered by engaging with the piston body 10, the rotating body 20 cannot rotate clockwise, but continues to rotate counterclockwise, thereby preventing the output shaft 30 from idling. Similarly, in the case of Fig. 11,
The output shaft 30 is prevented from idling by pushing up the piston body 10 through projections 36 and 37 that engage with the reverse rotation prevention cam 35 to prevent reverse rotation of the rotating body 20.

As described above, the present invention directly controls the vertical movement of the piston body through the eccentric hole of the rotating body rotatably housed in the circular hole provided in the connecting body of the piston body and the eccentric ring integrated with the output shaft. When converting into rotational motion, a reverse rotation prevention cam attached to the output shaft prevents the rotating body from reversing through projections provided on the mutually facing surfaces of the piston, thereby preventing the output shaft from idling. It is possible to obtain reliable driving force by
Since this anti-reverse cam is housed within the cylinder block, the entire cam can be miniaturized, and since no gear mechanism is provided, it is easy to process, and it has the advantageous features of preventing noise generation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway side view of the entire body, FIG. 2 is a vertical sectional view of the rotating body, and FIG. 3 is a partially cutaway side view of the output shaft.
Figures 4, 5, 6, and 7 are front views, with some parts missing, showing the operating state of the piston body, and Figures 8, 9, 10, and 1, respectively.
FIG. 1 is an operational diagram showing the relationship between the anti-reverse cam and the protrusion. 1 and 2 are pistons, 5 is a connecting body, 6 is a circular hole, 1
0 is the piston body, 11 is the cylinder block, 1
2 and 13 are cylinders, 20 is a rotating body, 21 is an eccentric hole, 30 is an output shaft, 31 is an eccentric ring, 35 is a reverse rotation prevention cam, and 36 and 37 are projections.

Claims (1)

[Claims] 1 One end of a large diameter circular hole 6 provided at the center of a connecting body 5 that integrally connects a pair of pistons 1 and 2 that are housed in a pair of upper and lower cylinders 12 and 13 provided in a cylinder block 11 so as to be able to move up and down. A first locking portion 7 is provided protruding from the inner surface, and slide portions 8, 8 are provided on both sides of the connecting body 5 to slidably contact the inner wall of the cylinder block, and a bearing 25 is provided within the circular hole 6. A rotating body 20 that is rotatably fitted through the
A second locking portion 22 is provided on the outer surface of one end to form a pair with the first locking portion 7 and prevent the bearing 25 from coming off. A third locking part 23 is provided at the end opposite to 22, and a pair of protrusions 36 and 37 are provided above and below on the opposing surfaces of the pair of pistons 1 and 2, respectively, and on the center line of the piston body. , the shaft 30 has a reciprocating engine in which the outer peripheral surface is in contact with the protrusions 36 and 37, and the maximum eccentricity of the anti-reverse cam is arranged on the same straight line as the maximum eccentricity of the eccentric wheel 31 of the shaft. Idling prevention device.