Smc Kabushiki Kaisha

Smc Corporation

Naoki Hoshi

Hiroyuki Asahara

Michikazu Miyamoto

Masaki Miyahara

Shinichiro Nemoto

Yasunaga Suzuki

Ryosuke Sato

Hideho Koyama

Syun Orihara

Shun Orihara

Tadashi Saito

Electric actuator

In a fluid pressure cylinder, a piston is displaced in an axial direction under the action of a pressure fluid. A circular protrusion, which projects toward the piston along an axial direction of the cylinder tube, is formed on an inner end surface of a collar member constituting part of the fluid pressure cylinder, a concavity, which can be fitted externally over the circular protrusion, is formed on the piston, and an annular groove is formed on an inner circumferential edge of an end plate. By the piston coming into contact with the end plate, a pressure receiving chamber is formed between the piston and the annular groove, together with an opening of a second port on an inner side of the cylinder tube being closed to a maximum of 90%.

Fluid pressure cylinder

The pistoncomprises a fixing ringmounted on a piston rod, and a piston bodyfixed to the fixing ring. The fixing ringis comprised of two semi-circular plated membersA,B having plural threaded holesfor bolt-fastening of the piston body. When they are abutted against each other and formed into a circular-annular shape, a hole portionwhich is to be tightly fitted in a fixing grooveof the piston rodis formed. The piston bodyhas a hole portionwhich is to be fitted over the piston rod, and plural bolt holescorresponding to the threaded holes. Moreover, the piston bodyhas a concave portionon a side of one surface thereof, in which the fixing ringis fitted in an embedded state.

Piston assembly in fluid pressure cylinder

A rodless cylinder has adjusting mechanisms, each comprising a gear shaft rotatably mounted in a hole defined in an outer wall of a slide table and having a first gear on an end thereof, an adjustment shaft having a second gear on an end thereof which is held in mesh with the first gear at a predetermined angle, and a rod coupled to an opposite end of the adjustment shaft out of alignment with a central axis of adjustment shaft, with a guide roller being rotatably supported on the rod. When the gear shaft is turned by a screwdriver bit inserted in the hole, the adjustment shaft is turned to displace the guide rod for optimum rolling contact with a rail on a cylinder tube. The rolling contact between the guide rod and the rail can be adjusted from the outer side of the slide table.

Bearing adjusting mechanism for rodless cylinder

A rodless cylinder for feeding a workpiece has a cylinder having a cylinder tube with a bore defined therein and a piston reciprocally movably disposed in the bore. The cylinder tube has a slit defined therein and extending longitudinally therealong, the slit communicating between the bore and an exterior space. The slit is closed by a first seal member engaging the piston and a second seal member engaging a slide table. The piston has a separator separating the first and second seal members from each other. The cylinder tube has a pair of slanted first surfaces positioned one on each side of the slit. A pair of slide members is disposed on the slide table and have respective second surfaces engaging the first surfaces, respectively, for guiding the slide table when the piston reciprocally moves in the bore and bearing a load applied to the slide table. The rodless cylinder may additionally have a floating mechanism mounted on the slide table for allowing displacements substantially perpendicular to the direction in which the slide table is movable along the cylinder tube.

Rodless cylinder

Growing community of inventors

Matsudo, Japan

Naoki Hoshi