Frictional dynamics of the overrunning clutch for pulse-continuously variable speed transmissions: rolling friction

Output Speed Prediction of an Overrunning Clutch for Oscillatory Input Motion using a Simplified Approach

“…Liu et al have described the working principle of overrunning clutch for the case of a reciprocating motion input [9,10]. They stated that the clutch will convert the reciprocating input motion into a onedirectional rotational output.…”

“…Furthermore, smaller roller radius and higher number of roller will also reduce the friction. In addition, they also had done a study on the effect of the rolling friction based on the number and size of the rollers [4]. The study claimed that the rolling friction torque is directly proportional to the input load with a power of 3/2.…”

Finite element analysis of automotive cushion discs

“…This allows to preserve mechanical parts from shocking each other, increasing the lifespan of the engine and improving the driver's comfort. Conventional clutches include electromagnetic clutches [2,3], gear clutches [4,5], friction clutches [1], overrunning clutches [6,7] and centrifugal clutches [8]. Car manufacturers requirements for greater power transmission, lightweight, low cost design, smaller design space, high comfort and high effectiveness lead to develop new clutches mechanisms such as ultrasonic clutch [9] or piezoelectric clutch [10].…”

Design and implementation of a piezoelectric clutch mechanism using piezoelectric buzzers

“…This clutch is used to transmit the torque or motion from the driving to driven end in one-way direction. In spite of its simple construction, a considerably bulky size and a loud noise arising at the transient moment of the members from the coupling to non-coupling mode restrict this type of mechanism can only applicable for low-speed and non-precision machines [12,13].…”