Motion range changing device for crank arm length

Abstract

Abstract PURPOSE: To facilitate the conversion of motion range through the rack pestle which which supports the bottom end with the crank-pin by fitting the threaded crank arm with the crank-pin-equipped table and also by changing the position of the above table by rotating the crank arm. CONSTITUTION: When the crank table 10 is turned together with the crank arm 1 by rotating the crank shaft 27, the rack pestle 20 makes reciprocating motion in accordance with a certain locus because the bottom end of the rack pestle is supported by the crank-pin 8 of the crank-pin table 7. Thus, the pinion 32 engaged with the rack teeth 20' of the rack pestle 20 turns alternately to the left and right along with the output shaft 31 in the same number of rotations. In case of the change in the number of rotations of the output shaft 31, the motor 25 is reversed. By so doing, the crank arm 1 is also reversed, and the crank pin table 7 moves up and down along the arm 1. Thus, the center position between the pin 8 and the crank-shaft 27 is changed to alter the moving distance of the rack pestle 20. COPYRIGHT: (C)1980,JPO&Japio

Inventors

• 👤 Sanemi Niimoto

Bibliographic Details