Research

▼ Robot Mechanisms

Load-sensitive CVT using an oblique feed screw

We have developed an oblique feed screw that can be used as a load-sensitive continuously variable transmission (CVT). This CVT consists of a screw, spring, and bearing, and it is remarkably simple and compact. Its reduction ratio changes automatically in response to the load, and its weights 13.8 g. We have experimentally verified that it can exert a large force of more than 100 N, that it can increase its reduction ratio from 20 to 45.

	WMV movie (2.1 M) No load
	WMV movie (2.1 M) 4 kg load
	WMV movie (2.1 M) 10 kg load

Reference

Takeshi Takaki, Toru Yamasaki and Idaku Ishii: Load-sensitive continuously variable transmission using an oblique feed screw for parallel-jaw grippers, Proc. MHS2011& Micro-Nano Global COE, pp. 507-510 (2011)