Machine element or mechanism – Mechanical movements – Rotary to or from reciprocating or oscillating
Patent
1995-06-05
1997-08-12
Herrmann, Allan D.
Machine element or mechanism
Mechanical movements
Rotary to or from reciprocating or oscillating
92 68, 123 535, 1231974, F16H 2134
Patent
active
056554060
DESCRIPTION:
BRIEF SUMMARY
FIELD OF TECHNOLOGY
The present invention relates to a rotary motion drive system. More precisely it relates to a rotary motion drive system, which is capable of converting linear motion into rotary motion.
BACKGROUND OF THE TECHNOLOGY
There have been known a reciprocating internal combustion engine, an oil motor, etc. as the rotary motion drive system, which is capable of converting linear motion into rotary motion. In each conventional rotary motion drive system, linear motion of a piston, which is reciprocatively moved in a cylinder, is converted into rotary motion of a crank shaft.
DISCLOSURE OF THE INVENTION
The conventional reciprocating engine and the oil motor, however, have the following disadvantages.
The piston and the crank shafts are connected with a connecting rod. One end of the piston and one end of the connecting rod are pivotably connected to each other, so that they can be mutually inclined. And one end of the crank shaft and the other end of the connecting rod are also pivotably connected each other, so that they can be mutually inclined. Even if the thrust force of the piston is transmitted to the connecting rod, the thrust force cannot be perfectly transmitted to the crank shaft when the connecting rod is inclined with respect to the piston and the crank shaft. Namely, the thrust force of the piston is divided between the piston and the connecting rod, and the component force transmitted to the connecting rod is further divided between the connecting rod and the crank shaft, so that a great loss cannot be avoided. Thus, the rotary torque of the crank shaft must be smaller with respect to the thrust force of the piston, so that the efficiency of converting the linear motion into the rotary motion must be lower.
Therefore, an object of the present invention is to provide a rotary motion drive system, which is capable of increasing the efficiency of converting the linear motion into the rotary motion.
To achieve the object, the rotary motion drive system of the present invention has following constitution.
Namely, the rotary motion drive system comprises: a pair of first guides being arranged parallel in a first direction; a pair of second guides being arranged parallel in a second direction perpendicular to the first direction; a first rod being arranged parallel to the first guides, the first rod being capable of keeping parallel to the first guides and moving in the second direction; a second rod being arranged parallel to the second guides, the second rod being capable of keeping parallel to the second guides and moving in the first direction; a moving body being capable of moving on the first rod and the second rod in the first direction and the second direction within a square plane, which is rounded by the first guides and the second guides; a first driving mechanism for moving the second rod in the first direction; a second driving mechanism for moving the first rod in the second direction; an output shaft being capable Of rotating about own axis; and a lever for rotating the output shaft, one end of the lever being pivotably connected to the moving body, the other end of the lever being pivotably connected to one end of the output shaft, whereby the lever rotates the output shaft when the moving body moves round the output shaft.
Further, the rotary motion drive system may further comprise: a first parallel mechanism for keeping the first rod parallel to the first guides; and a second parallel mechanism for keeping the second rod parallel to the second guides.
In the rotary motion drive system of the present invention, one end of the lever is pivotably connected to the moving body; the other end of the lever is pivotably connected to one end of the output shaft. With this structure, the lever rotates the output shaft when the moving body moves round the output shaft. The force-transmitting-loss, which is occurred when the linear thrust force of the first rod and the second rod is converted into the rotary torque, is occurred only at the connecting point of the moving body
REFERENCES:
patent: 288007 (1883-11-01), Calver
patent: 995423 (1911-06-01), Ellis
patent: 997190 (1911-07-01), Harvey
patent: 2564363 (1951-08-01), Horowitz et al.
patent: 4995277 (1991-02-01), Yanagisawa
Herrmann Allan D.
Yugen Kaisha Sozoan
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