An example rotational joint assembly for a robotic medical system, the rotational joint assembly comprising at least one arm segment and a rotational joint provided at one end of the arm segment. The rotational joint is to allow the arm segment to rotate about a rotational axis. The rotational joint comprising a brake to lock rotation of the arm segment at the rotational joint and an actuator to selectively engage or disengage the brake. The actuator comprising a cam having two stable regions separated by two transition regions, the two stable regions comprising a first stable region corresponding to engagement of the brake and a second stable region corresponding to disengagement of the brake.

A leg assembly and a legged robot having same are provided. The leg assembly includes a first leg, a second leg, a motor, an output flange and a transmission component. The motor is arranged at a first end of the first leg, and an output shaft of the motor is connected to the output flange to drive the output flange to rotate. The first leg is pivotably connected to the second leg, and the transmission component is connected to the output flange and the second leg to drive the second leg to rotate relative to the first leg. The output flange is provided with a first limiting portion, the first leg is provided with a first stop portion and a second stop portion spaced apart and configured to stop the first limiting portion, and the first leg is provided with a second limiting portion configured to stop the second leg.

A cooling medium flow path structure is for use at a joint of a robot. The joint of the robot includes an N-th link and an N+1-th link. A tubular projection extends from a first wall constituting the N-th link, and a motor is located on the first wall. The cooling medium flow path structure is annularly or tubularly shaped such that an inner peripheral surface of the cooling medium flow path structure is located outside an outer peripheral surface of the motor. The cooling medium flow path structure includes an internal cooling medium flow path through which a cooling medium flows.

A system for performing a dental procedure includes a hand piece having a robot arm that extends along a first axis, and a medical tool coupled with a distal end of the robot arm. The system includes a first gimbal coupled with the robot arm for rotating the robot arm and the medical tool about the first axis, a second gimbal coupled with the robot arm for tilting the medical tool up and down relative to the first axis, and a third gimbal coupled with the robot arm for moving the medical tool up and down along a second axis that is perpendicular to the first axis. The hand piece includes a turret that supports the robot arm and rotates within a plane that is perpendicular to the second axis.

An operation method for a link actuating device provided with a target value input unit having a height direction target value input portion that allows input of a movement amount in a height direction or a coordinate position in the height direction, which causes the distal end posture of the link actuating device to be changed only in the height direction along a central axis of a proximal end side link hub. An input converter is provided to calculate, by using an inputted value, a target distal end posture of the link actuating device. The input converter further calculates a command operation amount of each actuator from the result of the calculation, and inputs the command operation amount to the control device.

An operation command generator includes: an area division unit configured to divide a line on a flat work surface of a target workpiece W into a straight area and a corner area, using a sharp boundary surface; a straight area operation command generation unit configured to generate a command for operating only the linear motion mechanism while keeping the posture of the parallel link mechanism fixed, in the straight area; and a corner area operation command generation unit configured to generate a command so that an acting point of the end effector passes on the boundary surface at a substantially constant speed by the linear motion mechanism and the parallel link mechanism performing coordinated operations in the corner area.

A palm-type mechanical gripper with variable-position and rotatable fingers and a dual-drive crank-slider parallel mechanism is provided with a crank-slider mechanism on the left side, which is an active driving structure and is driven by two stepping motors to respectively generate angular displacement of cranks and to change lengths of connecting rods, and a crank-slider mechanism on the right side, which is a driven mechanism and is driven at a constant speed by a pair of gears. The mechanical gripper is provided with three plate spring fingers, wherein two fingers are respectively installed on the connecting rods on left and right sides, and under the cooperative effect of the two stepping motors, the eccentricities of the cranks, the positions and angles of the two fingers respectively on the two connecting rods and the position of the other fixed finger can be changed through manual adjustment.

A smart sensorized gripper connected to and controlled by a controlling device comprises a gripper base, a driving assembly, two moving assemblies, two gripping assemblies, two angle sensors and a displacement sensor. The driving assembly and the sensors are disposed on the gripper base and connected to the controlling device. The driving assembly drives the gripping assemblies to grip and release an object through the moving assemblies. An axial force along a Z-direction and a gripping force along an X-direction of the smart sensorized gripper are controlled by sensing crank elements of the gripping assemblies with the angle sensors and sensing a displacement of a moving element of the driving assembly with the displacement sensor, increasing functionality and positioning precision. The sensors are disposed at the gripper base to avoid extra electrical wirings on the gripping assemblies, simplifying the wirings and reducing the cost.

A force transmission transmits forces received by three levers to an input gimbal plate having three support points. The input gimbal play may in turn transmit the force to a wrist assembly coupled to a surgical tool. The three axes of rotation for the three levers are parallel. Two of the levers may have half-cylinder surfaces at an end of the lever to receive a support point of the input gimbal plate. Two of the levers may be supported with one degree of rotational freedom orthogonal to the axis of rotation of the fulcrum. A spring may draw the second and third levers toward one another. Two levers may have stops that bear against the support points. The force transmission may include a parallelogram linkage that includes a rocker link pivotally coupled to the first lever and having a flat surface that supports the first gimbal support point.

The present invention relates to a parallel robot system, including: a control apparatus; a parallel robot, including a mounting base, a moving platform, and a driving apparatus arranged between the mounting base and the moving platform, where the driving apparatus is configured to drive the moving platform to make multi-degree-of-freedom movement relative to the mounting base, and the driving apparatus receives a control signal from the control apparatus; a tracer, arranged on the moving platform; a passive arm, where the mounting base of the parallel robot is connected to one end of the passive arm; and an optical positioning and tracking apparatus, configured to track a spatial position of the tracer in real time and to send spatial position data of the tracer to the control apparatus. The parallel robot system according to the present invention is small in size and convenient to mount, can be connected to various tools by a tool interface, and can provide various functions of auxiliary punching, implantation, positioning and the like.