An electromechanical system operates in part through physical interaction with an operator, and includes a multi-axis robot, a controller, and a counterbalance mechanism connected to the robot. The counterbalance mechanism includes a base structure connected to a set of linkages, a pneumatic cylinder, a spring-loaded cam assembly, and an optional constant force spring. The linkages form a four-bar parallelogram assembly connectable to a load. The cylinder and cam assembly, and optional constant force spring, each impart respective vertical forces to the parallelogram assembly. The forces combine to provide gravity compensation and self-centering functions or behaviors to the load, enabling the load to move with a vertical degree of freedom when manually acted upon by the operator, and to return the load to a nominal center position.

The present invention relates to a method and system for optimizing the joint hinge point position of a hydraulic tandem mechanism based on lightweight. The method comprises: determining rotational load characteristics of each joint in the hydraulic tandem mechanism using dynamics simulation software based on said end load characteristics and said structural parameters of the tandem mechanism; establishing a fixed coordinate system between two adjacent rods in each joint and a joint global coordinate system, and determining the relationship between hinge point coordinates, joint rotation angle and joint drive force arm of each joint; calculating linear load characteristics of each joint according to said rotational load characteristics and said joint drive force arm to calculate hydraulic cylinder structural parameters and hydraulic oil source flow rate for each joint; determining a lightweight index for the joint hinge point position of the hydraulic tandem mechanism according to said hydraulic cylinder structural parameters and said hydraulic oil source flow rate; solving the coordinates of each joint hinge point of the tandem mechanism corresponding to the minimum of said lightweight index, using said lightweight index as a fitness function, so that the overall weight of the tandem mechanism is minimized.

A vibration reduction system includes a base, a carrier element, and a plurality of actuator systems extending between the base and the carrier element, the plurality of actuator systems arranged to apply forces to the carrier element in multiple axes to reduce vibration of the carrier element, each actuator system of the plurality of actuator systems including a pneumatic actuator and an electric actuator.

The invention relates to an automatic walking garden trimmer, which includes a power locomotive and a trimming device, the power locomotive is rotatably connected with a turntable support which is driven by the power device to rotate horizontally; a lower supporting arm and a base cylinder for driving the lower supporting arm to swing are hinged to the turntable support; at least two overhanging arms and an extension cylinder for driving the overhanging arms to swing and adjusting an overhanging distance are hinged to an end of the lower supporting arm, and a sphere is connected to the connecting seat; two groups of trimming devices are arranged on side surfaces of the sphere, the trimming device includes a spiral device and a trimming ring, the spiral device includes a spiral bracket on which a sleeve is disposed on. A rotary blade of the trimming device can be replaced.

For tightening screwed connections by a multi-screwing device with first and second screwing tools, each with rotary drive for screwing an exchangeable bushing on and off, a device for longitudinally straining a threaded bolt, and a tool for retightening the nut, the screwing tools are moved at right angles relative to tool axes by an actuating drive. When the bushings of the screwing tools are both screwed onto a threaded bolt, these steps are performed: a) bushing of first screwing tool is unscrewed from threaded bolt and raised; b) first screwing tool is moved relative to the second into a position in which tool axis of first screwing tool is aligned with screw axis of a further threaded bolt; c) first screwing tool is lowered and screwed onto further threaded bolt; d) threaded bolt is longitudinally strained, and e) steps a) to d) are repeated for second tool.

A nuclear emergency multifunctional operation robot includes a base, a mechanical arm, a tool change-over device, and motion supporting devices. The base includes a pedestal, a mounting seat A, a mounting seat B, a mounting seat C, a rotation driving mechanism A, and a rotation driving mechanism B. The front end of the mechanical arm is connected to the mounting seat B; the tool change-over device includes a male connector and a female connector which are abutted with or separated from each other; and the motion supporting devices are used to drive the nuclear emergency multifunctional operation robot to move. The present disclosure has the advantages that the base can be integrated with various end tools, so that the operation robot conveniently changes over tools according to operation needs to conduct various types of operations.

Systems and method for forming a stable silo face in bulk material are disclosed. Particularly, systems and methods for forming a negative rake angle in a silo face of bulk silage are disclosed. Rotation of an articulated arm (e.g., raising and lowering), altering a length of the articulated arm (e.g., extension or retraction), and movement of a machine relative to the silo face (towards and away from) may be automatically controlled to form the negative rake angle. Different implementations contemplate automated control of all or fewer than all of these operations.

A lightweight 4-degree-of-freedom leg mechanism of a bionic quadruped robot, which includes a hip-joint lateral-swing assembly, a thigh longitudinal-swing assembly and a shank longitudinal-swing assembly. The hip-joint lateral-swing assembly includes a hip-joint swing cylinder and an electro-hydraulic actuator. One end of the electro-hydraulic actuator and one end of the thigh longitudinal-swing assembly are respectively connected to the hip-joint swing cylinder via a connecting block. The other end of the electro-hydraulic actuator is hinged to a side of the thigh longitudinal-swing assembly. The other end of the thigh longitudinal-swing assembly is hinged to the shank longitudinal-swing assembly.

Provided is a rotation drive device that has a wide rotary driving range, e.g. a rotary driving range of 0°-180°. Disclosed is a rotation drive device comprising a crank member rotatable about a crank axis, a first cylinder having a first piston and rotatable about a first cylinder rotation axis, and a second cylinder having a second piston and rotatable about a second cylinder rotation axis. The crank member and the first piston are coupled for rotation about a first piston rotation axis spaced from the crank axis. The crank member and the first piston are coupled for rotation about a second piston rotation axis spaced from the crank axis.

A fine work assistance system is configured such that a parallel link mechanism is used for a slave manipulator activated by a master operation, and a precise motion for microsurgery or the like is performed by remote control. In a slave unit of a master-slave manipulator, the parallel link mechanism with multiple degrees of freedom is used for a link mechanism in which an end effector is movable with respect to a base. Moreover, a tip operation part is driving by a hydraulic driving mechanism such that a plurality of linear actuators supported by the base move one ends of links so as to move the end effector, and the slave unit is activated in response to a user operation on the master unit. This achieves the precise motion of the end effector and causes the end effector to perform operations for a precise work.