Abstract:
A method and apparatus for gripping, especially a method and apparatus for gripping elongate pieces, such as pipes, bars, beams, etc., are disclosed. The apparatus (410) comprises a body (412), the body having an inner cavity for receiving a piece to be gripped, the inner cavity having a sidewall, a recess (418) provided around at least a portion of the sidewall, a clamping member (422) disposed within the recess, wherein the recess is adjustable from a first dimension, where the clamping member is located substantially within the recess, to a second dimension where the clamping member is urged out of the recess and into the inner cavity. The gripping method comprises the steps of locating a clamping member around a piece to be gripped, locating two clamping shoulders such that they flank the clamping member, compressing the clamping member by urging the clamping shoulders together, the clamping member being arranged such that axial compression of it translates to radial compression.
Abstract:
The present invention relates to an hydraulic piston-cylinder arrangement (5) which is adapted to allow a first sleeve (10), an outer sleeve, to be displaced relative to a second sleeve (20), an inner sleeve, during development of an oil film (31) of high pressure between mutually facing conical surfaces (10b, 20b) of respective sleeves, so that the inner sleeve (20) will be compressed radially by radial expansion of the outer sleeve (10) and therewith be pressed against one or two shaft sections (2b, 3b) to provide an adapted clamping effect and therewith provide a slip-free torque transmission coupling. The piston-cylinder arrangement includes a first part (6a) of a first two-part coupling element (6), wherein a second part (6b) of said coupling element (6) is carried by the outer sleeve (10). In addition the piston-cylinder arrangement (5) also includes a first part (7a) of a second two-part coupling element (7), wherein a second part (7b) of said second two-part coupling element is carried by said inner sleeve (20) or by a corresponding counter-pressure surface.
Abstract:
The invention concerns an arrangement for transmitting torque between a shaft (1) and a structural component (10) which is mounted thereon and comprises an aperture for the shaft (1). The arrangement comprises: a conical clamping device with a pressure ring (4) which has a cylindrical inner peripheral surface (3) resting against the shaft (1), and at least one conical outer peripheral surface (5', 5''); a clamping ring (8); and axially parallel clamping screws (9) by means of which the clamping ring (8) can be tightened axially on the pressure ring (4) in the axial direction by sliding along the conical peripheral surfaces. The pressure ring (4) can be radially compressed and clenched on the shaft (1). On one side, the structural component (10) abuts only the pressure ring (4), and the structural component (10), pressure ring (4) and clamping ring (8) can be tightly fastened by the clamping screws (9).
Abstract:
Bereitgestellt wird Schrumpfscheibe zum kraft- bzw. reibschlüssigen Verbinden einer Welle mit einer Hohlwelle oder dergleichen mit einem innen liegenden Stauchring (2), dessen Außenmantelfläche mindestens eine Konusfläche (4) aufweist, und mit mindestens einem äußeren Druckring (3), der wiederum radial außen mindestens eine Umwicklung (10) aus einem Band besitzt und dessen Innenmantelfläche eine Konusfläche (5) aufweist, die mit der Konusfläche (4) des Stauchringes (2) zusammenwirkt, so dass beim axialen Verspannen der Stauchring (2) zusammengedrückt wird. Diese Schrumpfscheibe zeichnet sich dadurch aus, dass zur Herstellung der Umwicklung (10) das Band unter einer Zugspannung um den Druckring (3) gewickelt wird. Dadurch wird erreicht, dass die Schrumpfscheibe höheren Belastungen ausgesetzt werden kann.
Abstract:
The present invention refers to a sleeve (4) for increasing a torque transferring ability between a first elongated machine member (1) and a second machine member (2) having an opening surrounding the first elongated machine member, and intended to be subjected to a pressure directed toward the first elongated machine member (1), wherein the sleeve (4), at least at one of its inner and outer envelope surfaces, is provided with a friction increasing layer.
Abstract:
A clamp for a cylindrical workpiece (3), such as a shaft, pipe, cable or the like that does not require high friction forces, close tolerances, and avoids uneven clamping pressure. The clamp includes a threaded sleeve (5) for circumferentially engaging the workpiece and at least one correspondingly threaded nut (13) in threaded engagement on the sleeve for engaging either another nut (11) on the sleeve or a stationary workpiece (55) integrally formed with the sleeve. The sleeve is provided with a shallow thread configuration having a flank angle (21) which produces a radial force component that exceeds the axial force component when the nut is tightened, thereby imparting a uniform radial clamping force along the entire extent of the threaded engagement.
Abstract:
Eine Vorrichtung (1) zur reibschlüssigen Kupplung zweier koaxialer Bauteile (4, 5, 41, 42), insbesondere zweier Wellen (41, 42) oder einer Welle (4) und einer Nabe (5), weist ein erstes, inneres Kupplungsteil (2) mit kegelförmiger äusserer Mantelfläche (22) und ein zweites, äusseres Kupplungsteil (3) mit kegelförmiger innerer, Mantelfläche (32, 52) auf. Die beiden Kupplungsteile (2, 3) sind dazu geeignet, in Richtung einer Längsachse (11) reversibel derart aufeinander geschoben und dabei in radialer Richtung elastisch verformt zu werden, dass die kegelförmigen Mantelflächen (22, 32, 52) aufeinander aufliegen, und die zwei koaxialen Bauteile (4, 5, 41, 42) aufgrund der durch die elastische Verformung der Kupplungsteile (2, 3) verursachten radialen Kräfte über die Kupplungsteile (2, 3) miteinander reibschlüssig verbunden sind. Das äussere Kupplungsteil (3) weist an seinen beiden Längsenden auf der kegelförmigen Mantelfläche (32) je mindestens eine umlaufende Dichtung (35', 35") auf. Die dazwischen liegende Mantelfläche (32) ist mit einer den Haftreibungskoeffizienten erhöhenden Beschichtung (321) versehen.
Abstract:
A rotary valve actuator and linkage include an actuator having a tubular housing (30) with end caps and a piston (82) that is moved by fluid pressure against a compression spring (98). A rolling diaphragm (142) is used to bias the piston. A pair of slots (60) are provided on opposite sides of the housing, and a linkage having two arms (64, 66) is interconnected with the piston through the slots. The linkage is coupled to a rotary valve shaft (68) and linear movement of the piston causes rotational movement of the shaft. The linkage includes two separate arms and a centerpiece (150). In one embodiment, the arms and the centerpiece interengage each other at angled surfaces that force the centerpiece and the arms into radial engagement with the shaft when axial compression is provided to the arms and centerpiece to force them toward each other. In another embodiment, each of the linkage arms is provided with a collet having radially movable portions. The collet is forced into a recess in the centerpiece, causing the radially movable portions to be locked in engagement with the shaft.
Abstract:
A rotary valve actuator and linkage provide an actuator (48) having a tubular housing with end caps and a piston that is moved by fluid pressure against a compression spring (89). A rolling diaphragm is used to bias the piston. A pair of ports (60) are provided on opposite sides of the housing and a linkage (62) having two arms (64, 66) is interconnected with the piston through the ports. The linkage is coupled to a rotary valve shaft and linear movement of the piston causes rotational movement of the shaft. The linkage includes two separate arms and a centerpiece. The arms and the centerpiece interengage each other at angled surfaces that force the centerpiece and the arms into radial engagement with the shaft when axial compression is provided to the arms and centerpierce to force them toward each other.
Abstract:
A method and apparatus for gripping, especially a method and apparatus for gripping elongate pieces, such as pipes, bars, beams, etc., are disclosed. The apparatus comprises a body, the body having an inner cavity for receiving a piece to be gripped, the inner cavity having a sidewall, a recess provided around at least a portion of the sidewall, a clamping member disposed within the recess, wherein the recess is adjustable from a first dimension, where the clamping member is located substantially within the recess, to a second dimension where the clamping member is urged out of the recess and into the inner cavity. The gripping method comprises the steps of locating a clamping member around a piece to be gripped, locating two clamping shoulders such that they flank the clamping member, compressing the clamping member by urging the clamping shoulders together, the clamping member being arranged such that axial compression of it translates to radial compression.