TH15326U - Fluid pressure cylinder - Google Patents

Abstract

This device is a fluid pressure cylinder (10). A fluid pressure cylinder (10) shall include: a cylinder tube (12) of cylindrical shape which includes the inner cylinder chamber (22); a cylinder head cover (14) and a connecting rod cover (16) which are fitted to both ends of the cylinder tube (12); a piston (18) which is displaced along the cylinder chamber (22); and a connecting rod (20) which is attached to the piston (18). The piston (18) and the cylinder chamber (22) shall have cross-sections perpendicular to the axial direction and are formed into an octagonal shape. The piston (18) shall include a wear ring (44) which forms a structure to slide on the inner wall surface of the cylinder tube (12) and which has an octagonal cross-section perpendicular to the magnetic axis direction (33) which is fitted into the wear ring (44).

Claims (10)

Revised 20/12/2018. Claims. 1. A fluid pressure cylinder (10, 80) which is made up of: a cylinder tube (12, 84) of a cylindrical shape which includes the inner cylinder chamber (22), a pair of cover pieces (14, 16, 86, 88) which are fitted to both ends of the cylinder tube (12, 84), a piston (18, 82) which is displaced along the cylinder chamber (22), and a connecting rod (20) which is fitted to the piston (18, 82) which is characterized by the cross-section of the piston (18, 82) and the cylinder chamber (22) perpendicular to the axial direction having an octagonal shape. The piston (18, 82) includes a wear ring (44) which forms a sliding contact structure with the inner wall surface of the cylinder tube (12, 84) and the cross-section of the wear ring (44) perpendicular to the axial direction. The shaft is octagonal in shape and the magnets (33) are arranged in the wear ring (44). 1. A fluid pressure cylinder (10, 80) which is made up of: a cylinder tube (12, 84) with a cylindrical shape which includes the inner cylinder (22), a pair of cover pieces (14, 16, 86, 88) which are fitted to both ends of the cylinder tube (12, 84), a piston (18, 82) which is displaced along the cylinder (22), and a connecting rod (20) which is fitted to the piston (18, 82) which is characterized by the cross-section of the piston (18, 82) and the cylinder (22) perpendicular to the axial direction having an octagonal shape. The piston (18, 82) includes a wear ring (44) which is constructed to make sliding contact with the inner wall surface of the cylinder tube (12, 84) and the cross-section of the wear ring (44) perpendicular to the axial direction. The shaft is octagonal in shape, and the magnet (33) is arranged in the wear ring (44). 2. A fluid pressure cylinder (10) conforms to claim 1, in which a sensor, constructed to detect the magnetic field of a magnet (33), is attached to a rail. The sensors (32, 90) are mounted on the outer wall of the cylinder (12, 84) along the orbit of the magnet (33) which is displaced in the cylinder chamber (22). 3. A fluid pressure cylinder (10, 80) conforms to claim 1 or 2, in which the piston (18, 82) is rotatably coupled to the connecting rod (20). 4. A fluid pressure cylinder (140) which is made up of: a cylinder tube (142) of a cylindrical shape which includes the inner cylinder (143), a pair of cover pieces (144, 146) which are fitted to both ends of the cylinder tube (142), a piston (82) which is displaced along the cylinder (143), and a connecting rod (20) which is fitted to the piston (82) which is characterized by the cross-section of the piston (82) and the cylinder (143) perpendicular to the axial direction having an octagonal shape. The piston (82) includes a wear ring (44) which is structured to make sliding contact with the inner surface of the cylinder tube (142) and the cross-section of the wear ring (44) perpendicular to the axial direction has a hexagonal shape, and a magnet (33) is incorporated into the wear ring (44). 5. The fluid pressure cylinder (140) conforms to claim 4, in which a sensor, designed to detect the magnetic field of a magnet (33), is attached to a sensor mounting rail (90) arranged on the outer wall of the cylinder (142) along the orbit of the magnet (33) displaced in the cylinder chamber (143). 6. A fluid pressure cylinder (140) conforms to claim 4 or 5, in which the piston (82) is rotatably coupled to the connecting rod (20). 7. A fluid pressure cylinder (150) which is made up of: a cylinder tube (152) of a cylindrical shape which includes the inner cylinder (154), a pair of cover pieces (156, 158) which are fitted to both ends of the cylinder tube (152), a piston (82) which is displaced in the cylinder (154), and a connecting rod (20) which is fitted to the piston (82) which is characterized by the cross-section of the piston (82) and the cylinder (154) perpendicular to the axial direction being rectangular in shape. The piston (82) includes a wear ring (44) which is constructed to make sliding contact with the inner wall surface of the cylinder tube (152) and the cross-section of the wear ring (44) perpendicular to the axial direction is rectangular in shape, and a magnet (33) is incorporated into the wear ring (44). 8. The fluid pressure cylinder (150) conforms to claim 7, in which a sensor, designed to detect the magnetic field of a magnet (33), is attached to a sensor mounting rail (90) arranged on the outer wall of the cylinder (152) along the orbit of the magnet (33) displaced in the cylinder chamber (154). 9. A fluid pressure cylinder (150) conforms to claim 7 or 8, in which the piston (82) is rotatably coupled to the connecting rod (20). 10. A fluid pressure cylinder (10, 80, 140, 150) which consists of a cylinder tube (12, 84, 142, 152) with a cylindrical shape including the inner cylinder chamber (22, 143, 154), a pair of cover pieces (14, 86, 144, 156, 16, 88, 146, 158) attached to both ends of the cylinder tube (12, 84, 142, 452), a piston (18, 82) displaced along the cylinder chamber (22, 143, 154), and a connecting rod (20) attached to the piston (18, 82) where: the cross-sections of the piston (18, 82) and the cylinder chamber (22, 143, 154) are perpendicular to the axial direction. The piston (18, 82) will have a polygonal shape and incorporate a wear ring (44) that forms a structure to make sliding contact with the inner wall surface of the cylinder bore (12, 84, 142, 152), and the cross-section of the wear ring (44) perpendicular to the axial direction will have a polygonal shape, and a magnet (33) will be arranged in the wear ring (44).