| 摘要 |
PURPOSE:To obtain no speed change gear with excellent transmission efficiency by adopting structure of hanging a wrapping connector on a friction wheel which is in friction contact with a V type pulley. CONSTITUTION:An inner surface 12 of a V type pulley 11 has some slant angle and is positioned symmetrically with respect to a neutral axis. A guide 14 is equipped with two friction wheels 15 with a definite space of pitch Q, and said wheels 15 can be freely rotated by means of bearings 16 fitted to the guide 14. Further, the outer periphery of the friction wheels 15 form chain pulleys 17 which are wrapped by means of chains 18, while their sides in contact with the inner surfaces of V type pulleys 11 have definite radius of curvature. The breadth H of two V type pulleys 11 facing each other can be freely converted into stepless type, and two friction wheels 15 fitted to the guide 14 can be contacted and supported with all the diameters of pulleys 11 through moving the guide 14 left and right where the exterior sides 19 of the pulleys 11 are always under load of a predetermined pressure. |
