37results about How to "Meet the requirements of complex pick and place operations" patented technology

The invention discloses a parallel mechanism with three-dimensional translation and one-dimensional rotation. The parallel mechanism comprises a fixed frame, a moving platform and four branched chains which are symmetrically arranged between the fixed frame and the moving platform and have the same structure. Each branched chain comprises a near frame rod and two far frame rods parallel to each other, wherein one end of the near frame rod is fixedly connected with the drive end fixed on the fixed frame and the other end of the near frame rod is fixedly connected with an upper connection shaft; and one end of each far frame rod is ball-hinged with the upper connection shaft, and the other end of each far frame rod is ball-hinged with a lower connection shaft fixedly connected to the movingplatform. The moving platform comprises a main platform and a secondary platform which are connected by a rotary pair and vertical to each other, wherein both ends of the main platform and the secondary platform are connected with the corresponding lower connection shafts respectively. The parallel mechanism is simple in structure, has definite mode of motion and can meet the requirements of complex holding-releasing operations; and because the drive ends are symmetrically arranged, the rigidity of the mechanism in the whole working space is improved, and simultaneously by replacing the main platform and the secondary platform, or adding a reversing mechanism, the rotational degree of freedom is realized in three orthogonal directions.

The invention discloses a parallel mechanism capable of realizing three-dimensional translational motion and two-dimensional rotation. The parallel mechanism comprises a fixing frame and a movable platform. Five drive devices are fixedly connected to the fixing frame. The movable platform comprises a central plate and a rocker vertically penetrating through the center of the central plate. The central plate is connected with the rocker through a hooke hinge in a rotating mode. Two ball head rods are fixed at the upper end of the rocker. Three first branch chains are connected between the fixing frame and the central plate. Two second branch chains are connected between the fixing frame and the two ball head rods. The central plate is driven by the three first branch chains to be in three-dimensional translational motion. The rocker is driven by the two second branch chains to be in two-dimensional rotation relative to the central plate through the hooke hinge. Consequently, the rocker is enabled to have not only three translational motion freedom degrees but also two rotation freedom degrees. The parallel mechanism is simple and compact in structure, exquisitely realizes five freedom degrees through the hooke hinge, reduces mechanism complexity, and can realize high-speed high-precision complex grab easily.

The invention discloses a parallel mechanism with two-dimensional translation and two-dimensional rotation. The parallel mechanism comprises a fixed frame, a moving platform and four branched chains which are symmetrically arranged between the fixed frame and the moving platform and provided with a drive device respectively, wherein the four branched chains have two types of structures; the branched chain with one type of structure comprises a straight line guide rail, a drive block arranged in the straight line guide rail and a fixed-length connecting rod of which both ends are provided withrotary hinges; the branched chain with the other type of structure comprises a straight line guide rail, a drive block arranged in the straight line guide rail and a fixed-length connecting rod of which both ends are provided with spherical hinges; the four branched chains with the two types of structures are in crossed arrangement; one end of the fixed-length connecting rod is connected with themoving platform, and the other end of the fixed-length connecting rod is connected with the drive block; and the moving platform is connected with a main platform and a fork-shaped shaft, of which the axial lines are vertical to each other, by a rotary pair, and the main platform can rotate around the axial line of the fork-shaped shaft. The parallel mechanism has the advantages that: the structure is simple; the mode of motion is definite; the requirements on complicated holding-releasing operations are met; and because the connecting rod is the fixed length rod which helps to reduce the inertia load, the parallel mechanism has higher rigidity in different operational ranges, and the high-speed movement is easily realized.

The invention discloses a bar-wheel combined type three-translation one-rotation parallel mechanism which comprises a movable platform; the movable platform consists of two angle dividing mechanisms which are distributed horizontal and symmetrically; each angle dividing mechanism comprises a supporting plate, two angle dividing connecting bars, and two angle dividing gears; the angle dividing connecting bars are fixedly connected with the angle dividing gears; the angle dividing gears are hinged with the supporting plate; the angle dividing gears on the two angle dividing connecting bars are mutually engaged and are symmetrically arranged relative to the central line of the supporting plate; two adjacent lower connecting shafts are arranged on the supporting plate; the angle dividing connecting bars of the two angle dividing mechanisms are correspondingly connected one by one through a rotating pair; the four angle dividing connecting bars of the two angle dividing mechanisms form a structure similar to a diamond; an angle enlarging mechanism is fixedly connected with the supporting plate of any angle dividing mechanism; and a tail end actuator is fixedly connected with each angleenlarging mechanism. The bar-wheel combined type three-translation one-rotation parallel mechanism has the advantages of skillful and unique design, and good structural rigidity and good stability; moreover, the bar-wheel combined type three-translation one-rotation parallel mechanism can easily realize high speed motions, and can satisfy the requirements of complex grabbing and loosening operations.

The invention discloses a cross slide block type four-branched-chain three-translation and one-rotation high-speed parallel manipulator. The manipulator comprises a fixed frame, a movable platform, and four motion branched chains with the same structures; the movable platform includes four guide rods, four slide sleeves, two semicircular gears, two horizontal connecting rods, a platform, a rotating shaft and a terminal actuator; a center gear engaged with the two semicircular gears is arranged on a shaft section between the platform and the terminal actuator; the two same semicircular gears are rotationally connected with the two adjacent slide sleeves; and under driving of driving devices, power is transferred to the four motion branched chains by output ends of the four driving devices, and is transferred to the slide sleeves by the motion branched chains to drive the two same semicircular gears to rotate, and the rotating shaft is driven to rotate through gear transmission, so that the terminal actuator has three-degree-of-freedom of translation and one-degree-of-freedom of rotation.

The invention discloses a four-branch-chain three-platform one-rotor high-speed parallel connection mechanical hand, which comprises a fixing frame, a movable platform and four moving branch chains, wherein the four moving branch chains are arranged between the fixing frame and the movable platform, are in central symmetry arrangement and have the same structures, the movable platform comprises an upper platform, a lower platform, a tail end executer, four swinging rods, a spiral shaft and two support rods, the four swinging rods are arranged around the movable platform in a radial shape, and the two adjacent swinging rods are in rotational connection or hooke hinging or ball hinging to a connecting element, so the adjacent swinging rods realize the movement in opposite directions, one end of a spiral rod is rotationally connected with the upper platform, the middle of the spiral rod is spirally connected with the lower platform, the other end of the spiral rod is fixedly connected with the tail end executer, under the driving effect of a driving device, the lower platform moves in the spiral shaft direction, and the tail end executer fixedly connected with the spiral shaft realizes the rotation around the self axial line through screw thread connection effects. The four-branch-chain three-platform one-rotor high-speed parallel connection mechanical hand has the advantages that the force transmission effect of the movable platform is good, the movement of the mechanism is smooth, and the service life is long.

The invention discloses a high-speed parallel manipulator with six degrees of freedom. The high-speed parallel manipulator comprises a fixed rack, a movable platform and six branch chains with the same structures, wherein the fixed rack is provided with six driving devices; each branch chain consists of a near rack rod, an upper connecting shaft, two mutually-parallel far rack rods with equal length and a lower connecting shaft; the output ends of all the driving devices in the branch chains are respectively and fixedly connected with one end of one near rack rod and used for providing one degree of freedom for the corresponding near rack rod; the movable platform comprises an upper platform and a lower platform which are horizontally arranged and are mutually parallel; the upper platform and the lower platform are connected by virtue of a rotating mechanism with a screw rod; the six branch chains are classified into two groups of branch chains at sequential intervals, and the two groups of branch chains are used for respectively driving the upper platform and the lower platform; upper three-dimensional relative movement and lower three-dimensional relative movement are converted into three rotation movements of the screw rod by virtue of the rotating mechanism. The high-speed parallel manipulator is compact in structure, can be used for omitting an amplification mechanism, reducing the complexity of the mechanism, meanwhile reducing the quality of moving parts and improving the movement precision, and is easy for realization of complex picking and placing operations.

The invention discloses a parallel mechanism capable of realizing three-dimensional translation and three-dimensional rotation. The parallel mechanism comprises a fixed frame and a movable platform, wherein the fixed frame is fixedly connected with six driving devices, the movable platform comprises a central plate and a rocking rod, the central plate and the rocking rod are rotatably connected by utilizing a hooke joint, and the upper part and the lower part of the rocking rod are respectively a first lead screw and a second lead screw with different rotation directions; three first branch chains are connected between the fixed frame and the central plate, and three second branch chains are connected with the fixed frame and three bulb rods; the rocking rod is driven by the three first branch chains to realize the three-dimensional translation, and the rocking rod is driven by the three second branch chains to realize two-dimensional rotation relative to the central plate by the hooke joint; the rocking rod realizes autorotation by the relative movement of a nut and a hooke inner ring; and therefore, the rocking rod has three translation degrees of freedom and also has three rotation degrees of freedom. The parallel mechanism capable of realizing the three-dimensional translation and the three-dimensional rotation, which is disclosed by the invention, has the advantages that the structure is simple and compact, six degrees of freedom by utilizing the hooke joint and a screw pair are smartly realized, the mechanism complexity is reduced and the high-speed, high-precision complex grabbing is easily realized.

The invention discloses a high-speed parallel manipulator with three-dimensional translation and one-dimensional rotation. The manipulator comprises a fixing frame, a moving platform and four branch chains which have the same structure and are arranged between the fixing frame and the moving platform symmetrically, wherein four drive devices are fixedly connected with the fixing frame, the moving platform comprises four gear handles, four bevel sectors, two bevel gears, a base and an end effector, the end effector is hinged with the base in a rotary mode, two bevel gears have opposite spin directions, the bevel gears and the end effector are fixed coaxially, the four gear handles are arranged at an angle of 90 degrees and are respectively connected with the base through rotary shafts in a rotary mode, each of the bevel sectors is fixedly connected with the rotary shaft of one of the gear handles respectively, and the two pairs of bevel sectors which are arranged opposite and the two bevel gears mesh respectively. By the aid of the meshing constraint action between the bevel sectors and the bevel gears of which the spin directions are opposite, the three-dimensional translation of the base and the end effector rotation relative to the base can be achieved when the drive devices drive corresponding branch chains to move.

The invention discloses a rocker dislocation-type four-branch-chain three-translation one-rotation high-speed parallel manipulator. The rocker dislocation-type four-branch-chain three-translation one-rotation high-speed parallel manipulator comprises a fixed rack, a movable platform and four moving branch chains with the same structure, wherein spatial three-dimensional translation of the movable platform is ensured through the four moving branch chains with the same structure; the movable platform comprises a central gear, a platform and an end effector; four guide rails which are of centrally-radial arrangement are arranged on the platform; a sliding block is arranged in each guide rail; the central gear is meshed with four identical arc gears; a guiding groove is formed in the disc surface of each arc gear; the four sliding blocks separately drive the arc gears to move through the guiding grooves; and a rotary shaft is driven to rotate through the gears, so that the end effector has three degrees of translation freedom and one degree of rotation freedom. The movable platform is compact in structure and is symmetrically arranged; movement is flexible; stress is uniform; movement precision is high; the integral structure is good in stability; the structure is simple; manufacture and repair are convenient; and requirement of complex grabbing and releasing operation is met.

The invention discloses a five-degree-of-freedom parallel manipulator capable of realizing the high-velocity motion. The five-degree-of-freedom parallel manipulator capable of realizing the high-velocity motion comprises a fixed mount, a movable platform and five branched chains with the same structure, wherein the branched chains are symmetrically arranged between the fixed mount and the movable platform; the fixed mount is fixedly connected with five driving devices; the movable platform comprises two ball arm seats, two mutually-parallel connecting rods with the equal length and a central plate; two groups of plane-surface parallelogram structures are respectively formed; a transmission mechanism is meshed by two groups of gears; the translational motion of the the two ball arm seats relative to the central plate or the rotation of the two groups of parallel connecting rods relative to the central plate is converted into two power inputs of a two-degree-of-freedom wrist; and under the action of the driving device, the three-dimensional translational motion of the movable platform and the two-dimensional rotation of the two-degree-of-freedom wrist are realized. The five-degree-of-freedom parallel manipulator capable of realizing the high-velocity motion, which is disclosed by the invention, has the advantages of symmetrical integral structure, even stressing of the movable platform, light motion part quality and big possibility of realizing high-velocity motion, and the complex fetching and releasing requirements can be satisfied.

The invention discloses a high-speed six-degree of freedom parallel manipulator which comprises a fixed frame, a movable platform, a three-degree of freedom wrist and six moving branched chains that are arranged between the fixed frame and the movable platform and have the same structure; the fixed frame is fixedly connected with six driving devices; the movable platform comprises a centre plate, three subangle gear sets and six connecting rods, wherein each subangle gear set comprises a center bevel gear and two subangle bevel gears; the center bevel gears are rotatablely connected with the centre plate; the subangle bevel gears are rotatablely connected with the centre plates; every two subangle bevel gears are arranged at the two sides of each center bevel gear and are meshed and connected with the center bevel gear; one ends of the connecting rods are fixedly connected with a lower connecting shaft, and the other ends of the connecting rods are fixedly connected with one subangle bevel gear in the subangle gear sets; the three-degree of freedom wrist is fixedly connected on the center plate; three groups of gear transmission mechanisms are arranged around the three-degree of freedom wrist; and the three center bevel gears are respectively used for providing three power input for the three groups of gear transmission mechanisms, so that the three-degree of freedom wrist is driven to realize three-dimensional controllable rotation.