Abstract: A server packing assembly includes a server unit, a pallet unit and an anticollision unit. The server unit includes a rack that includes bottom and top walls and a pair of spaced-apart side walls that interconnect the top and bottom walls and that cooperate with the top and bottom walls to define front and rear openings, and at least one server disposed in the rack. The pallet unit includes a main board supporting the server unit thereon and positioned relative to the rack. The anticollision unit includes a front protector that removably covers the front opening and that is removably coupled to the rack and secured to the pallet unit, and a rear protector that removably covers the rear opening and that is removably coupled to the rack and secured to the pallet unit.

Abstract: A server packing assembly includes a server unit, a pallet unit and an anticollision unit. The server unit includes a rack that includes bottom and top walls and a pair of spaced-apart side walls that interconnect the top and bottom walls and that cooperate with the top and bottom walls to define front and rear openings, and at least one server disposed in the rack. The pallet unit includes a main board supporting the server unit thereon and positioned relative to the rack. The anticollision unit includes a front protector that removably covers the front opening and that is removably coupled to the rack and secured to the pallet unit, and a rear protector that removably covers the rear opening and that is removably coupled to the rack and secured to the pallet unit.

Abstract: A semi-active compliance device forms part of a robot used to stack packages. The semi-active compliance device has an X-Y motion mechanism and a remote center compliance mechanism. The X-Y motion mechanism provides active open-loop control of the forces of a package along the X and Y axes so that the X- and Y-axis positions of the package will be passively controlled by the environment (e.g., walls and/or adjacent stacks of packages). The X-Y motion mechanism has two linear actuators and two pantographs. The remote center compliance mechanism provides passive orientation of the package about the Z axis. The semi-active compliance device also has a mechanism to return the remote center compliance mechanism to a home position.

Abstract: A new and innovative concept for the control of backlash in gear-coupled transmission mechanisms. The concept utilizes redundant unidirectional drives to assure positive coupling of gear meshes at all times. Based on this concept, a methodology for the enumeration of admissible redundant-drive backlash-free robotic mechanisms has been established. Some typical two- and three-DOF mechanisms are disclosed. Furthermore, actuator torques have been derived as functions of either joint torques or end-effector dynamic performance requirements. A redundantly driven gear coupled transmission mechanism manipulator has a fail-safe advantage in that, except of the loss of backlash control, it can continue to function when one of its actuators fails. A two-DOF backlash-free arm has been reduced to practice to demonstrate the principle.