摘要:
A rotating air cylinder is disclosed. The rotating air cylinder, comprises a first master cylinder comprising a first cylinder block, a first sealing assembly assembled in one distal end of the first cylinder block; a cylinder shaft partially received in the first cylinder block; a first piston assembly movably sleeving on the cylinder shaft, wherein the first piston assembly moves longitudinally within the first cylinder block, and rotates relative to the cylinder shaft; a second master cylinder positioned coaxial with the first master cylinder comprising a second cylinder block received in another part of the cylinder shaft; a second sealing assembly assembled in the second cylinder block; a second piston assembly received in the second cylinder block, non-rotatably and slidably connected with the cylinder shaft, wherein the second piston assembly moves longitudinally in the second cylinder block and rotates relative to an axis of the second cylinder block.
摘要:
A linear actuator is provided having a housing with a bore having at least first and second portions extending therethrough. The second portion has a polygonal geometry with substantially rounded corners having at least one planar bearing surface. A shaft is in sliding engagement with the first portion of the bore, and a piston member is operatively coupled to the shaft. The piston member has a mating geometry to the second portion of the bore, wherein the piston member is in sliding engagement with the second portion of the bore. An anti-rotation member is coupled to the piston member or shaft and has a generally D-shaped geometry with a planar anti-rotation bearing surface. Contact between the anti-rotation member and the housing is limited to a sliding engagement between the anti-rotation bearing surface and one of the at least one bearing surfaces based on an orientation of the anti-rotation member.
摘要:
A fluid power linear drive including a housing having an inner surface defining a piston receiving space, a piston reciprocally movable within the piston receiving space and a cooperative engagement means provided on the inner surface of the housing and an outer surface of the piston to prevent the piston from rotating relative to the housing. The cooperative engagement means may take the form of a projection means and a cooperating longitudinal groove, wherein the inner surface of the piston receiving space has the projection means extending radially inwardly into the piston receiving space and the piston has the groove cooperatively engaging the projection means for preventing the piston from rotating within the piston receiving space.
摘要:
A fluid actuated piston and cylinder assembly with a cylinder housing having a head end and a cap end with a piston slidably reclined within the cylinder. A piston rod is attached to the piston for sliding movement with respect to the cylinder housing between an extended position and a retracted position with the piston rod extending out of the head end of the cylinder housing. A linear bearing assembly is interposed between the cylinder housing and piston rod for slidably engaging the piston rod along the axial direction with respect to the cylinder head. The linear bearing assembly frictionally engages the rod to prevent relative rotation motion between the piston rod and the cylinder.
摘要:
A rotation-preventing slide is provided for a linear actuator which includes a housing which defines an internal bore and a piston-rod assembly which linearly moves within the internal bore in response to fluid pressure. The rotation-preventing slide is connected to and moves with the piston-rod assembly within a guide defined by the housing and has a geometry (e.g., polygonal, rectangular, square) which prevents rotation of the piston-rod assembly. The slide may include a bearing block and an attachment member which extends through an opening in the bearing block and which is removably attached to the piston-rod assembly whereby the slide's bearing surface (e.g., the bearing block) may be easily replaced. The guide may be a guide slot position parallel to, but axially offset from, the internal bore.
摘要:
A pressure fluid cylinder with anti-rotation feature, includes a cylinder tube of non-circular inner cross section and a piston which is sealingly received in the tube. The piston has a circular cross section and is connected at one end to a piston rod in coaxial relationship. In order to allow selective use of the pressure fluid cylinder with or without anti-rotation feature, an annular adapter is placed between the piston and the tube and has a circular inner surface area to complement a circular outer surface area of the piston so as to allow a relative rotation between the piston and the adapter. The adapter has a non-circular outer surface area to complement the non-circular inner surface area of the tube. Through insertion of a fastener in aligned boreholes of the adapter and the piston, the adapter and the piston are prevented from rotating relative to one another.
摘要:
A cylinder device includes a casing with a pair of fluid inlet/outlet ports defined therein, a base plate, a piston fixed to the base plate, a cylinder, and a top plate. The cylinder device also has first, second, and third cylinder chambers defined in the cylinder between the base plate, the piston, and the top plate, a first fluid passage and a second fluid passage through which one of the fluid inlet/outlet ports communicates with the first and third cylinder chambers, and a third fluid passage and a fourth fluid passage through which the other fluid inlet/outlet port communicates with the second cylinder chamber.
摘要:
A guided cylinder is illustrated wherein a yoke for bridging diagonally opposed guide rods has connection thereto by means of enlarged aligned abutments adjacent upper ends of the guide rods to provide a mounting as well as flats for securely holding guide rods while affixing the yoke and thereafter providing a stable mounting for the yoke.
摘要:
A shaft moving device for elevating and lowering an operating shaft in a riveting machine. The device has a cylinder, a cylindrical member slidable up and down in the cylinder and a coaxially and rotatably supporting the operating shaft. The cylindrical member has an annular ring which also serves as a piston. A pump supplies pressure oil to the cylinder. A directional control valve is provided for selectively switching the oil supplied to the cylinder. Upper and lower ports are provided in said cylinder and are connected with the pump through the valve. The cylindrical member together with the operating shaft can be lowered and elevated by the actuation of the valve.
摘要:
A pneumatic device includes a cylinder, a buffer member and a piston unit. The cylinder includes a cylinder wall defining an air chamber. The buffer member has a tubular wall that defines a communicating hole. The tubular wall has a length greater than the wall thickness thereof. The piston unit includes a sealing member, and a rod member movably extending through the communicating hole. The rod member has a driven section received within the air chamber and mounted with the sealing member. The piston unit is movable between a restoring position where the driven section is spaced apart from the buffer member, and an impact position where at least one of the driven section and the sealing member is in contact with the buffer member.