MANIPULATOR WITH LINEAR MOTION ACTUATOR

摘要

A linear motion actuator is disclosed. The linear motion actuator can include a double-shafted motor having a first motor shaft with a first screw thread and a second motor shaft with a second screw thread. The first screw thread can have certain characteristics that are different from that of the second screw thread. The linear motion actuator is disclosed for use in an arm assembly of a laparoscopic manipulator, but can also be used in other types of devices.

主权项

1. A linear motion actuator, the linear motion actuator comprising:
a double- shafted motor comprising a first motor shaft having a first screw thread and a second motor shaft having a second screw thread, wherein a pitch of the first screw thread is different from that of the second screw thread; a first shaft guide having a threaded hole which engages with the first screw thread; a second shaft guide having a threaded hole which engages with the second screw thread; a housing to accommodate the motor, the first shaft guide, and the second shaft guide; and a linear guide configured to guide the motor and the second shaft guide in the housing, and prevent the housing and the second shaft guide from rotating relative to the first shaft guide.