Simulation and Design of Impulse Stepless Speed Variation
ABSTRACT
Continuously variable transmission (Abbr. CVT),is a transmissiongearing, which can make the rotational speed of output axle changecontinuously between max and min. generally speaking, according totransmission medium, CVT is classified as mechanical type, hydraulictype, and electric type. For many strong points, Mechanical CVT hasmore and more developed gradually domestically and abroad. Theadvantages include simple structure, easy repairing, low price, andefficient transmission, and general application, good steady andsatisfactory function. Especially some Mechanical CVT hasunchangeable power in wide range, which doesn’t reach by electricand hydraulic CVT. It is mainly composed of friction type, chain type,belt type, impulse type.
Impulse Stepless Speed Variation has been widely applied to all kinds of transmission system,because it has many advantages,such as reliable transmission,broad adjustable-speed rang, timing at rest or movement, compact structure and lighter weight, and so on.Its principle chiefly uses connecting rod(or cam) as the impulse generator such as crank-link type. Crank-link type can make uniform motion of input axle change into reciprocating swing of waving-link, and then by single super-clutch, the reciprocating swing of waving-link transmits single impulse rotating motion. We accomplish continuously variable transmission, by using structure of change speed. The structure can change dimension proportion between links and accomplish continuous change of swinging angle and average swinging speed.
Project work are:
1. Matlab software environment based on pulse-type CVT kinematics simulation;
2. Based on Pro / E software environment, the structure of impulse variable speed device design.
