2001 Volume 67 Issue 663 Pages 3602-3609
A N-type constant-torque spring is made of pre-stressed material and offers the advantage of constant torque and is being made in various sizes, suitable for a variety of applications (for example, drive mechanism, counterbalance, retracting and restoring mechanism). This spring takes the form of a tightly wound spiral and is placed on two drums. When the device is wound up by winding the spiral from the first drum to the second drum, the curvature of spiral is reversed. In this process, the constant torque is developed due to the tension plus the reverse bending moment of the spiral. In this report, the mechanism of constant torque and states of deformation are analyzed by using a large deformation theory. Moreover, an experiment is carried out to confirm the applicability of the proposed theory. The experimental results agree well with the theoretical estimations.
Transactions of the Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers
Transactions of the Japan Society of Mechanical Engineers Series A
Transactions of the Japan Society of Mechanical Engineers Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
