Abstract:
The invention relates to a drive screw system (10) comprising a stationary track (14), a drive screw (16) mounted for rotation relative to the stationary track about a screw axis (20), a nut (30) threadingly engaging the drive screw (16) for linear displacement parallel to the screw axis in response to rotation of the drive screw, and at least one slide bearing (32) for radially supporting and guiding the drive screw, the slide bearing being movable on the stationary track parallel to the screw axis. The slide bearing (32) is provided with at least a first friction pad (34) movable relative to the slide bearing (32) in at least a first direction transverse to the screw axis (20), and springs means (36, 38) biasing the friction pad (34) in said first direction against the stationary track (14).
Abstract:
Spindelmotor, umfassend einen Elektromotor mit einem Rotor, der mit einer Gewindespindel verbunden ist, deren Gewinde mit einem Gewinde einer mit einer Kolbenstange verbundenen Spindelmutter im Eingriff steht, wobei die Spindelmutter mit Kolbenstange axial geführt ist in einem Gehäuseteil wobei zur axialen Führung ein Führungsteil mit der Spindelmutter und der Kolbenstange verbunden ist, wobei in der Kolbenstange eine Abstützung für die Gewindespindel vorgesehen ist.
Abstract:
The invention relates to a machine tool, or a handling gear, in particular a long-bed machine tool, comprising a machine unit (1), which may be displaced along a guide (2), in relation to a machine frame (2), or an underlying machine unit. Said machine unit is, in particular, a carriage, which may be driven by a rotating motor (5), by means of a threaded spindle (4), with at least one damping device to suppress the vibrations of the threaded spindle (4). Said damping device comprises an auxiliary support (9), which may travel in the direction of the displaceable machine unit. The movement of the damping device(s) in all operating circumstances is controlled dependent upon the displacement of the displaceable machine unit (1), whereby the damping device(s) is/are driven by a drive system, which comprises a traction mechanism (7), guided over at least one guide roller.
Abstract:
The drive screw system comprises a drive screw (12) and a drive nut (26) adapted for driving a cooperating member such as a vehicle restraining device (50) between the proximal (12p) and distal (12d) ends of the drive screw (12). At least one bearing assembly (36, 38) is mounted to a track (32) for supporting the drive screw (12) and automatically moving between the proximal (12p) and distal (12d) ends of the drive screw (12) in response to the drive nut (26) to automatically maintain a predetermined maximum unsupported length of the drive screw (12). Each bearing assembly (36, 38) comprises two bearing supports (36d, 36p; 38d, 38p) connected at a fixed length and which are coaxially disposed relative to each other. In one embodiment, the length of each bearing assembly are integral multiples of the smallest fixed connecting length and the drive screw (12) has stationary bearing supports (20, 22) disposed at the proximal (12p) and distal (12d) ends wherein the distance between the stationary supports (20, 22) is (n+1)*L where n is the number of bearing assemblies and L is the length of the shortest bearing assembly.
Abstract:
The linear traversing apparatus (10) includes a lead screw (12) formed from a plurality of lead screw segments (14, 16, 18) which are supported at regular intervals, that is, at the intersection of adjacent lead screw segments, along a span by fixed hollow cylindrical splice points (20, 22). The lead screw segments (14, 16, 18) include external threading which engages the internal threading of a C-shaped spanning nut (28). The C-shaped spanning nut (28) has a circumferential portion removed so that the spanning nut (28) can clear the fixed hollow cylindrical splice points (20, 22) and associated support structure (24, 26) as the spanning nut (28) traverses the lead screw (12) in response to the rotation of the lead screw (12) and the inhibition of rotation of the spanning nut (28). The rotation of the spanning nut (28) is inhibited typically by mechanical communication with an instrument or other device which is engaged by a rail or a slot parallel to the longitudinal axis of rotation of the lead screw (12).
Abstract:
The invention relates to a machine tool, or a handling gear, in particular a long-bed machine tool, comprising a machine unit (1), which may be displaced along a guide (2), in relation to a machine frame (2), or an underlying machine unit. Said machine unit is, in particular, a carriage, which may be driven by a rotating motor (5), by means of a threaded spindle (4), with at least one damping device to suppress the vibrations of the threaded spindle (4). Said damping device comprises an auxiliary support (9), which may travel in the direction of the displaceable machine unit. The movement of the damping device(s) in all operating circumstances is controlled dependent upon the displacement of the displaceable machine unit (1), whereby the damping device(s) is/are driven by a drive system, which comprises a traction mechanism (7), guided over at least one guide roller.
Abstract:
A stabilizer (40) for a ball screw actuator of the type having a cylinder housing (10), and externally threaded lead screw (16) and a drive nut (26) movable along the lead screw (16) in which the stabilizer (40) includes a first member (41) rotationally fixed but movable linearly relative to the cylinder housing (10) and a second member (42) rotatable relative to, but linearly fixed, relative to the first member (41).
Abstract:
The invention concerns a device in linear actuators comprising a carriage (1) which is guided for movement on or in a rail by means of a rotatable threaded spindle (3) extending in the longitudinal direction of the rail. The spindle runs freely through at least one screw support (2, 17, 18, 20, 21, 22, 23), which serves as a bearing supporting the spindle (3) intermediate the ends thereof. The carriage (1) and the screw support (2, 17, 18, 21, 22) are provided with interacting locking means (4, 5, 6, 7) arranged to cause said screw support (2, 17, 18, 21, 22) to be brought along by said carriage (1) during part of the movement of the latter along the spindle (3). In addition, means (11, 19, 28, 29) are provided for releasing the carriage (1) and the screw support (2, 17, 18, 21, 22) from one another as they pass said means while at the same time they secure the screw support (2, 17, 18, 21, 22) in the position into which it has been moved.