Stepless speed change belt pulley device

Abstract

Abstract PURPOSE:To obtain a stepless speed change by replacing an output shaft of a friction stepless speed change machine with a belt pulley body in a belt pulley device, and changing the position of the output shaft in response to torque applied to the belt pulley. CONSTITUTION:A conically shaped rotor 3 has a conical plane 3a capable of changing its effective radius by axial movement of a speed change ring 4, a transmission plane 3b having a circular arc-shaped cross section engaging in friction with a transmission wheel 5 on a driving shaft 1, and a flat frictional transmission plane 3c engaging in friction with a non-rotary orbital ring 6. Rotational speed of a belt pulley body 2 acting as an output element is reduced as the speed change ring 4 is moved in a direction toward the cone bottom of the conically shaped rotor 3, and finally to 0. The spring 9 of a spring device 7 is energized so as to move the speed change ring 4 to the high speed side, while a cam device 8 tends to move the speed change ring 4 to the low speed side resisting the spring 9.

Inventors

• 👤 Tadashi Kashiwara
• 👤 柏原　正

Bibliographic Details