Patent ID: 8931125
Filing Date: 2015-01-13
Classification: A61B,F16H,Y10T

Abstract:
1. A cradle drive mechanism comprising: a drive motor; an intermediate frame having a first end and a second end opposite the first end; a screw and nut transmission device disposed between the drive motor and the intermediate frame, wherein the screw and nut transmission device is driven by the drive motor so as to drive linear reciprocating motion of the intermediate frame; a rotating shaft having a. first driving wheel and a gear and being mounted at the first end of the intermediate frame; a transmission belt set on the first driving wheel and on a second driving wheel mounted at the second end of the intermediate frame; a rack meshed with the gear so that, during linear reciprocating motion of the intermediate frame, the rack forces the gear to rotate and drive rotation of the first driving wheel, wherein rotation of the first driving wheel drives rotation of the transmission belt; and a cradle connector fixed on the transmission belt and configured to connect a cradle and to drive linear reciprocating motion of the cradle.