In this rod-less cylinder equipped with a guide mechanism (32), the guide mechanism (32) has: a first rail member (34), which is attached to the sidewall of a cylinder tube (2), has an inner rolling groove (34a), and is composed of alloyed steel; a second rail member (36), which is attached to a protrusion (31) of a slider (27), has an outer rolling groove (36a), and is composed of alloyed steel; a guide path (38a) provided in the protrusion of the slider and extending parallel to the second rail member; a connection member (39) having a connection path (39a) that connects the guide path and the inner rolling groove; and a plurality of rolling bodies (43) accommodated within an endless circulation path (42) formed of the inner rolling groove, the outer rolling groove, the guide path, and the connection path.

A drive system (1) which is designed in particular as a robot (1a) and which has a fluid-operated linear drive (2), on the drive unit (7) of which linear drive, which drive unit can be driven so as to perform a drive movement (8), there is mounted an electrically and fluidically operable working unit (3). The linear drive (2) is equipped with a control valve device (16) which can be actuated by means of an internal electronic control device (32) in order to move the drive unit (7). Two drive pressure sensor devices (113) and a travel measuring device (114) are connected to the internal electronic control device (32), such that a position-controlled operation of the drive unit (8) is possible. The drive system (1) furthermore includes a flexible electrical cable arrangement (97) and a flexible fluid hose arrangement (95), which are fixed to the drive unit (7) and which serve for the supply of electricity and fluid to the working unit (3).

In the present invention, both ends of a cylinder are blocked by end caps, two pistons that reciprocate within the cylinder due to fluid pressure are disposed inside the cylinder, and a space surrounded by the two pistons and the inner wall of the cylinder is connected to a fluid supply/exhaust port provided an end cap of the cylinder via a coiling tube position inside the cylinder.

The invention relates to a linear drive device having a housing element in which at least one drivable actuating element is arranged, a guide unit which is coupled to the actuation element and moves relative to the housing element between two stroke end positions in linear direction, a stroke limiting device, by means of which a first stroke end position and a second stroke end position of the guide unit are adjustable, wherein the stroke limiting device has a first stop and a first counterstop for setting a limit of the first stroke end position and a second stop and a second counterstop for setting a first limit of the second stroke end position, wherein the stroke limiting device has a third stop which is adapted to set a second limit of the second stroke end position adjusted with the first counterstop.

A fluid powered rotary actuator having a first member which is pivotally connected to a second member and which is includes at least one toroidal shaped spear or piston which acts within a correspondingly shaped toroidal shaped cylinder to move the first member relative to the second member. The or each toroidal shaped spear or piston and cylinder assembly includes seals mounted within a seal carrier and the configuration allows movement of the seals relative to the or each cylinder. This configuration allows the seals to continue to provide a leak resistant hydraulic seal between each toroidal shaped spear or piston and its associated cylinder even in cases where the toroidal shaped spears or pistons deflect relative to their associated cylinders. The cylinders are also mounted to the first or second members in a manner designed to reduce the chance of tensile cracking due to deflection of the cylinders.

An actuating unit for locking a component of a construction machine, in particular a road milling machine or a surface miner, the actuating unit comprising a retaining part for fastening to the construction machine. A self-propelled construction machine, in particular a road milling machine or a surface miner, comprising at least one actuating unit of this type. The basic principle of the actuating unit is the design of the cylinder of a piston/cylinder arrangement as a locking bolt. In the actuating unit, a piston is connected to the retaining part and is surrounded by a cylinder, with a first cylinder chamber being formed on one side of the piston and a second cylinder chamber being formed on the other side of the piston. A cut-out which extends in the direction of the longitudinal axis of the cylinder and through which the retaining part extends is provided in the cylindrical wall of the cylinder. If one of the two cylinder chambers is supplied with a fluid, the cylinder moves to one side or the other, while the retaining part remains stationary. Therefore, the cylinder constitutes a locking bolt, which can be pushed forward or pulled back.

A linear module includes: a base, a slide stage, two support frames, two retaining units and a steel belt. With the pivoting freedom given by the guide portions of the retaining units, when the slide stage moves, the rolling elements can be abutted more closely against the contact surface of the steel belt via the pivoting of the guide portions, so as to reduce the occurrence of deformation and clearance produced by the steel belt, which not only improves the sealing performance of the steel belt and operation smoothness of the linear module, but also produces a dust proof effect, thus achieving the purposes of automatically adjusting contact angle, preventing deformation while extending the life of the steel belt.

The invention relates to a linear drive device having a housing element in which at least one drivable actuating element is arranged, a guide unit which is coupled to the actuation element and moves relative to the housing element between two stroke end positions in linear direction, a stroke limiting device, by means of which a first stroke end position and a second stroke end position of the guide unit are adjustable, wherein the stroke limiting device has a first stop and a first counterstop for setting a limit of the first stroke end position and a second stop and a second counterstop for setting a first limit of the second stroke end position, wherein the stroke limiting device has a third stop which is adapted to set a second limit of the second stroke end position adjusted with the first counterstop.

A linear module includes: a base, a slide stage, two support frames, two retaining units and a steel belt. With the pivoting freedom given by the guide portions of the retaining units, when the slide stage moves, the rolling elements can be abutted more closely against the contact surface of the steel belt via the pivoting of the guide portions, so as to reduce the occurrence of deformation and clearance produced by the steel belt, which not only improves the sealing performance of the steel belt and operation smoothness of the linear module, but also produces a dust proof effect, thus achieving the purposes of automatically adjusting contact angle, preventing deformation while extending the life of the steel belt.

In this rod-less cylinder equipped with a guide mechanism (32), the guide mechanism (32) has: a first rail member (34), which is attached to the sidewall of a cylinder tube (2), has an inner rolling groove (34a), and is composed of alloyed steel; a second rail member (36), which is attached to a protrusion (31) of a slider (27), has an outer rolling groove (36a), and is composed of alloyed steel; a guide path (38a) provided in the protrusion of the slider and extending parallel to the second rail member; a connection member (39) having a connection path (39a) that connects the guide path and the inner rolling groove; and a plurality of rolling bodies (43) accommodated within an endless circulation path (42) formed of the inner rolling groove, the outer rolling groove, the guide path, and the connection path.