JPH0953697A - Motion converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motion converter wherein a vibration can be reduced by changing a structure of rotary motion parts, and improving motion converting efficiency. SOLUTION: The converter is provided with a set of reciprocating motion part 2 formed by providing a piston 4 serving as a mover guided linearly movably by a ctlinder 3, two sets of rotary motion parts 10, 20 formed by connecting crankshafts 11, 21, to the piston by connecting rods 13, 23 and a synchronizing means 30 synchronously rotating the two crankshafts of two sets of the rotary motion parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motion converter for converting one of reciprocating motion and rotary motion into the other.

[0002]

2. Description of the Related Art Reciprocating engines and piston type pumps are known as motion converters having a reciprocating motion part that reciprocates and a rotary motion part that rotates. The reciprocating engine converts a reciprocating motion due to thermal energy into a rotary motion, and the piston type pump uses the same mechanism in reverse and converts a rotary motion due to a rotary power into a reciprocating motion.

A conventional example of this type of motion converter is shown in FIG. FIG. 3 is an explanatory diagram showing the principle of the motion converter. In the motion converter 1, a pair of reciprocating motion parts 2 in which a piston 4 is slidably fitted in a cylinder 3 and a crank arm 12 provided on a crank shaft 11 are connected to the piston 4 by a connecting rod 13. And a pair of rotary motion units 10 formed by the above. In this case, one end of the connecting rod 13 is rotatably connected to the piston 4 via the piston pin 14, and the other end is rotatably connected to the crank arm 12 via the crank pin 15.

When the motion converter 1 is a reciprocating engine, when the piston 4 reciprocates within the cylinder 3 due to thermal energy, the motion of the piston 4 is caused by the connecting rod 13 and the crank arm 12 to the crankshaft. 11, the rotary motion is converted and transmitted, and the rotary power is taken out. In the case of a piston type pump, when the crankshaft 11 is rotated by rotational power, the rotation of the crankshaft 11 is converted into reciprocating motion and transmitted to the piston 4 by the connecting rod 13 and the crank arm 12, and a fluid is supplied. Is configured to compress.

[0005]

However, in the above-mentioned prior art, the motion converter 1 has a structure in which the one set of reciprocating motion unit 2 and the one set of rotary motion unit 10 are combined. Therefore, there are the following problems. The piston 4
Is supported by the one piston pin 14,
A swinging phenomenon occurs around the piston pin 14 and the straightness is poor. Therefore, it is necessary to guide the piston 4 so as to linearly reciprocate by the cylinder 3 and the like, and accordingly, when the piston 4 reciprocates, the cylinder 3 is rubbed to generate sliding resistance.

Since the connecting rod 13 is converted into motion and transmits power inclining with respect to the cylinder axis O, a force F1 in the axial direction of the connecting rod 13 causes a component force F2 in the radial direction of the piston. It is generated and the piston 4 is pressed against the inner wall of the cylinder 3 by the component force F2, which causes an increase in the sliding resistance. Therefore, the sliding resistance of the piston 4 reduces the efficiency of motion conversion.

In the rotary motion unit 10, the crank shaft 1 is composed of the one connecting rod 13 and the crank arm 12.
The rotational moment M is biased to 1 and acts. For this reason, a two-dimensional vibration is generated in the bearing that supports the crankshaft 11 by virtue of a vertical and horizontal motive force F3.

In view of the above situation, the present invention provides a motion converter capable of improving the motion conversion efficiency and reducing vibration by changing the structure of the rotary motion part.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a set of reciprocating parts comprising a moving body guided so as to be linearly movable, and a plurality of sets in which a crankshaft is connected to the moving body by a connecting rod. And a synchronizing means for synchronously rotating a plurality of crankshafts of the plurality of sets of rotary moving parts.

Therefore, in the motion converter, for example, when the moving body reciprocates, the movement of the moving body is transmitted to the two connecting rods. At this time, since the two crankshafts are rotationally controlled so that they are synchronously rotated by the synchronizing means, the two crankshafts are respectively rotated by the two connecting rods and converted into rotational motion. It When the movement is converted, the moving body is supported by the piston pins of the two connecting rods and the like, so that the swinging phenomenon is suppressed. Further, particularly when the two crankshafts rotate in opposite directions, the component force in the piston radial direction due to the axial force of the two connecting rods is canceled out, so that the sliding resistance of the moving body is reduced. The efficiency is greatly reduced and the motion conversion is improved. Further, on the bearing side of the two crankshafts, the lateral vibration forces are canceled out, and the vibration on the case side is reduced.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view showing the principle of an embodiment of a motion converter according to the present invention, and FIG. 2 is an explanatory view showing a synchronizing means. The motion converter 1 includes the one set of reciprocating motion unit 2, and the reciprocating motion unit 2 includes, for example, two sets of rotary motion units 10 and 2.
0 are connected in series, and a synchronization means 30 is provided to the two sets of rotary motion parts 10 and 20. The pair of reciprocating parts 2
Has a piston 4 as a moving body, and the piston 4 is fitted in the cylinder 3 and is slidably guided.

In one of the two sets of rotary motion parts 10 and 20, the rotary motion part 10 has one end of a connecting rod 13 pivotally attached to a crank pin 15 of a crank arm 12 provided on a crank shaft 11, and the connection is performed. The other end of the rod 13 is pivotally attached to the piston 4 via a piston pin 14. Similarly, in the other set of rotary motion parts 20, one end of a connecting rod 23 is pivotally attached to a crank pin 25 of a crank arm 22 provided on a crank shaft 21, and the other end of the connecting rod 23 is connected via a piston pin 24. And is pivotally attached to the piston 4. Therefore, the piston 4
Is supported by the two connecting rods 13 and 23.

The two crankshafts 11 and 21 and the two crankshafts
Elements constituting the rotary motion part such as the connecting rods 13 and 23 of the book are formed to have the same length and shape. As a result, the two sets of rotary motion parts 10 and 20 are arranged symmetrically with respect to the piston center line O, and are configured to operate in the same manner and to perform motion conversion action together.

As shown in FIG. 2, the synchronizing means 30 has a timing gear 3 on each of the two crankshafts 11 and 21.
1, 32 are provided, and the timing gears 31, 32 are directly meshed with the same number of teeth. Therefore, the pair of timing gears 31 and 32 are used to connect the two crank shafts 11 and 2.
1 rotates at the same rotation speed in the opposite direction in synchronization.

Therefore, in the above structure, when the motion converter 1 is a reciprocating engine, the piston 4 is pushed downward by thermal energy, and when the piston 4 reciprocates in the cylinder 3, The movement of the piston 4 is transmitted to the two connecting rods 13 and 23. At this time, if the same load is applied to the two crankshafts 11 and 21, the power of the piston 4 is equally divided into two and transmitted to the two connecting rods 13 and 23. Further, the two crankshafts 11 and 21 are connected to the pair of timing gears 3
Since it is designed to rotate synchronously in the opposite directions by 1, 32, the two connecting rods 13, 23 approach each other,
Or, they move symmetrically as they move away from each other.

The two crankshafts 11 and 2 are connected by the two connecting rods 13 and 23 and the crank arms 12 and 22.
1 is rotated, and the motive power of the piston is converted into rotational movement by half, and the rotational power is equally taken out from the two crankshafts 11 and 21. Since the reciprocating motion of the one set of reciprocating parts 2 is divided into two by the two sets of revolving parts 10 and 20, the reciprocating part 2 is converted into a revolving motion. The motion is converted appropriately.

At the time of the movement conversion, the piston 4 is connected to the connecting rod 13 via the two piston pins 14 and 24.
Since it is supported by 23, the swinging phenomenon of the piston 4 is suppressed, and the straightness of the piston 4 is greatly improved. Therefore, the piston 4 is less likely to rub the cylinder 3, and the sliding resistance is reduced. Since the two connecting rods 13 and 23 move symmetrically and the inclination angles with respect to the piston center line O are always equal, the two connecting rods 13 and 23 are
The component force F2 in the piston radial direction due to the axial force F1 always acts in the opposite direction and is offset. Therefore, the sliding resistance of the piston 4 with respect to the cylinder 3 is significantly reduced,
This improves the efficiency of motion conversion.

Further, since the two connecting rods 13 and 23 move symmetrically, in the two sets of rotary motion parts 10 and 20, the rotational moment M is applied to the two crankshafts 11 and 21.
Always works in the opposite direction. Therefore, on the bearing side of the two crankshafts 11 and 21, the lateral motive force F3 acts in the opposite direction to be offset, and the vibration on the case side is reduced.

When the motion converter 1 is a piston type pump and the two crankshafts 11 and 21 are rotated by rotational power to convert the reciprocating motion of the piston 4, the same operation is performed. To do.

The present invention is not limited to the above embodiment. For example, it can be applied to the case where the piston 4 is a slider which is guided by a guide as appropriate. The synchronization means 30 may rotate the two crankshafts 11 and 21 synchronously in the same direction. The rotary motion part
You may provide three or more sets.

[0022]

As described above, according to the present invention, a pair of reciprocating motion parts including a moving body guided so as to be linearly movable and a crankshaft are connected to the moving body by a connecting rod. Since the configuration includes a plurality of sets of rotary motion parts and a synchronization unit that synchronously rotates a plurality of crankshafts of the plurality of sets of rotary motion parts, the swinging phenomenon of the moving body is suppressed. Therefore, the guide of the moving body can be simplified, and the motion can be converted with high efficiency.

In particular, when the two crankshafts rotate in opposite directions, the sliding resistance of the moving body is greatly reduced, and the efficiency of motion conversion is improved. Furthermore, it is possible to reduce vibrations associated with the rotation of the plurality of sets of rotary motion parts.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a motion converter according to the present invention.

FIG. 2 is a front view showing a synchronization means.

FIG. 3 is an explanatory diagram of a conventional motion converter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 motion converter 2 reciprocating motion part 4 piston 10 rotary motion part 11 rotary motion part 12 crankshaft 20 crankshaft 21 connecting rod 23 connecting rod 30 synchronizing means

Claims (1)

[Claims] 1. A set of reciprocating motion parts comprising a moving body guided so as to be linearly movable, and a plurality of sets of rotating motion parts each having a crankshaft connected to the moving body by a connecting rod, and the plurality of rotating motion parts. A motion conversion machine comprising: a synchronization unit that synchronously rotates a plurality of crankshafts of a pair of rotary motion units.