Abstract: A body-side cushion structural body attached to a body and a piston-side cushion structural body integrally moving with a piston are disposed outside the body, a cushion rod is disposed on either one of the cushion structural bodies, while a rod fitting hole is disposed in the other cushion structural body, a cushion packing is disposed at a spout portion of the rod fitting hole, and moreover, a throttle valve that discharges air in the rod fitting hole to the outside with flow-rate adjustment is disposed so as to configure an air cushion mechanism that stops the piston in a buffering manner.

Abstract: A damper hole having a large-diameter section is formed inside a body which is made of metal. A flange which fits in the large-diameter section is formed in a damper which is made of rubber and is received in the damper hole. The flange defines a cushion chamber in the large-diameter section. A gap for letting air restrictively discharge from the cushion chamber is formed between an outer periphery of the flange and an inner periphery of the large-diameter section. Motion energy of a moving object colliding with the damper is absorbed by both elasticity produced by the compressed damper and an air cushion effect produced by the flange and the cushion chamber.

Abstract: A linear actuator includes a guide mechanism and a retainer. On a guide block of the guide mechanism, a pair of ball-circulating grooves is formed on the lower surface that faces a cylinder body. Multiple balls are loaded in the ball-circulating grooves. Paired cover blocks are respectively mounted on the two ends of the guide block. The retainer has the form of paired ball clips, which are formed as arms to engage with the cover blocks when the clips are inserted in the ball-circulating grooves to hold the balls. Paired cover plates are respectively mounted on the end faces of the cover blocks, and arm-shaped cover clips are mounted so as to hold the cover plates. The cover plates, the cover blocks, and the guide block are thereby integrally linked.

Abstract: A linear actuator includes a cylinder main body. With respect to the cylinder main body, a slide table is disposed for reciprocal displacement through a guide mechanism, which is disposed on the cylinder main body. A stopper mechanism having a stopper bolt is disposed on one end of the slide table centrally in a widthwise direction perpendicular to the longitudinal direction of the slide table. In addition, when the slide table is displaced along the cylinder main body, an end of the stopper bolt comes into abutment with an end of a cover of the guide mechanism, whereupon the slide table becomes engaged therewith and movement of the slide table is stopped.

Abstract: The present invention relates to a linear actuator. A slide table of the linear actuator includes a table main body and an end plate connected to another end of the table main body. On a base portion of the table main body, four workpiece retaining holes are formed, and fitting seats are disposed respectively about the workpiece retaining holes on radial outer sides thereof. The fitting seats are formed at the same time that the table main body is formed by press molding.

Abstract: A linear actuator. On a guide block that configures a guide mechanism, a pair of ball-circulating grooves is formed on the lower surface that faces a cylinder body and multiple balls are loaded in the ball-circulating grooves. Paired cover blocks are respectively mounted on the two ends of the guide block. Paired ball clips, which are formed as arms, are engaged with the cover blocks when the clips are inserted in the ball-circulating grooves and are holding the balls. Paired cover plates are respectively mounted on the end faces of the cover blocks, and arm-shaped cover clips are mounted so as to hold the cover plates. The cover plates, the cover blocks and the guide block are thereby integrally linked.

Abstract: A linear actuator includes a guide block constituting a guide mechanism. In the guide block, a pair of installation grooves are formed in a lower surface facing toward a cylinder main body. Ball circulation members having therein ball circulation holes are installed respectively in the installation grooves. Additionally, ball circulation passages through which balls circulate are provided. The ball circulation passages are made up from roll-reversing sections disposed on opposite ends of the ball circulation members, the ball circulation holes, second ball guide grooves formed in both side surfaces of the guide block, and first ball guide grooves of the slide table.

Abstract: The present invention relates to a linear actuator. A slide table of the linear actuator includes a table main body and an end plate connected to another end of the table main body. On a base portion of the table main body, four workpiece retaining holes are formed, and fitting seats are disposed respectively about the workpiece retaining holes on radial outer sides thereof. The fitting seats are formed at the same time that the table main body is formed by press molding.

Abstract: A damper hole having a large-diameter section is formed inside a body which is made of metal. A flange which fits in the large-diameter section is formed in a damper which is made of rubber and is received in the damper hole. The flange defines a cushion chamber in the large-diameter section. A gap for letting air restrictively discharge from the cushion chamber is formed between an outer periphery of the flange and an inner periphery of the large-diameter section. Motion energy of a moving object colliding with the damper is absorbed by both elasticity produced by the compressed damper and an air cushion effect produced by the flange and the cushion chamber.

Abstract: A linear actuator includes a cylinder main body. With respect to the cylinder main body, a slide table is disposed for reciprocal displacement through a guide mechanism, which is disposed on the cylinder main body. A stopper mechanism having a stopper bolt is disposed on one end of the slide table centrally in a widthwise direction perpendicular to the longitudinal direction of the slide table. In addition, when the slide table is displaced along the cylinder main body, an end of the stopper bolt comes into abutment with an end of a cover of the guide mechanism, whereupon the slide table becomes engaged therewith and movement of the slide table is stopped.

Abstract: A linear actuator includes a guide block constituting a guide mechanism. In the guide block, a pair of installation grooves are formed in a lower surface facing toward a cylinder main body. Ball circulation members having therein ball circulation holes are installed respectively in the installation grooves. Additionally, ball circulation passages through which balls circulate are provided. The ball circulation passages are made up from roll-reversing sections disposed on opposite ends of the ball circulation members, the ball circulation holes, second ball guide grooves formed in both side surfaces of the guide block, and first ball guide grooves of the slide table.

Abstract: A body-side cushion structural body attached to a body and a piston-side cushion structural body integrally moving with a piston are disposed outside the body, a cushion rod is disposed on either one of the cushion structural bodies, while a rod fitting hole is disposed in the other cushion structural body, a cushion packing is disposed at a spout portion of the rod fitting hole, and moreover, a throttle valve that discharges air in the rod fitting hole to the outside with flow-rate adjustment is disposed so as to configure an air cushion mechanism that stops the piston in a buffering manner.

Abstract: An apparatus main body 1 is provided with an air supply passage 19 for supplying compressed air for supporting a borne surface 42 in a shape of a projecting spherical surface of an aligning member 4 on a bearing surface 32 in a shape of a partial recessed spherical surface of an air bearing 3 such that the borne surface 42 can be aligned and for floating the aligning member 4 with respect to the air bearing 3. A lock mechanism for locking the aligning member 4 has contact faces 24 and 44 in contact with each other at a locking portion 25 at a tip end of a piston rod driven by a cylinder driving portion 2 and on a face of the aligning member 4 opposite to the borne surface 42 and the contact faces are formed into partial spherical surfaces concentric with the borne surface 42.

Abstract: A thrust producer of a moving-magnet type includes a rod supported for upward and downward movements by an apparatus main body through an air hydrostatic bearing and a thrust producer for moving the rod up and down, the thrust producer has a magnet mounted to the rod to be displaced with the rod and a coil provided to the apparatus main body to generate magnetic force when the coil is energized, and the thrust producer produces thrust by an interaction of the magnet and the magnetic force generated by the coil.

Abstract: Two rods 2 and 3 disposed in parallel to each other are supported through hydrostatic bearings 8 and 9 on a main body block 1, one end portions of the rods project from opposite faces facing each other of the main body block, and the projecting ends of the rods 2 and 3 projecting from the main body block are respectively fixed to both 15a and 15b of a table 15 surrounding the main body block including the opposite face sides from which the rods project.

Abstract: A circular piston and a noncircular rod are separately formed as separate parts and the piston and the rod are integrally connected to each other through an adhesive in a state in which the piston is aligned to be concentric with a circular bearing hole of a first air bearing and the rod is aligned to be concentric with a noncircular bearing hole of a second air bearing.

Abstract: A plurality of jaw members 3, 3 for gripping a work piece on a casing 2, to be opened or closed freely, a driving part 4 having a driving rod 9 to be moved linearly, reciprocally, a converting mechanism 7 for converting the linear reciprocal motion of the driving rod 9 into the opening or closing operation of the jaw members 3, 3, a position detecting part 5 capable of detecting the operating position of the jaw members 3, 3 for all the stroke, comprising a scale 33 displaced synchronous with the driving rod 9, and a reader 34 for reading the calibration engraved on the scale 33, and a linear guide mechanism 6 for guiding the linear reciprocal movement of the scale 33.