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 hydraulic frictional coupling for either mounting a hub on a shaft, or for connecting two shafts, (Figs. 5(a), 5(b)) (not shown) comprises an annular chamber (c, 16, 36) housing an annular piston (d, 15, 35), the chamber and the piston having matching tapers. Oil fed (e.g. at h) to one end of the chamber, moves the piston axially to cause radial expansion connecting the shaft and hub or two shafts. Oil fed (e.g. at i) to the other end of the chamber allows the coupling to be disconnected.
Abstract:
A friction coupling (3") for locking a shaft (1) relative to a hub (2) comprises an inner sleeve (4), which is arranged for frictional engagement with the shaft (1), an outer sleeve (5), which is arranged for frictional engagement with the hub (4), and means (6; 6a) for actuating the friction coupling by radial deformation of at least one of the inner sleeve (4) and the outer sleeve (5). The friction coupling further comprises a compensating gap (7), which is arranged between said actuating means and the other of the inner sleeve (4) and the outer sleeve (5), and adapted to counteract radial deformation of the other of the inner sleeve (4) and the outer sleeve (5).
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. Ein Hydraulikwerkzeug (6) ist vorgesehen, welches in der Lage ist, in Richtung des zunehmenden Umfangs der Mantelfläche (22) des ersten Kupplungsteils (2) eine axiale Kraft auf das zweite Kupplungsteil (3) wirken zu lassen, sowie Hydraulikmittel (34, 54, 66', 68, 58, 38), mit welchen ein ölgefüllter Spalt zwischen den beiden Mantelflächen (22, 32) erzeugbar ist, welcher eine reibungsarme Verschiebung der beiden Kupplungsteile (2, 3) zueinander erlaubt. Die Vorrichtung weist Sicherungsmittel (7) auf, mit welchen eine maximal mögliche Verschiebungsposition des zweiten Kupplungsteils (3, 31, 5) in Richtung des zunehmenden Umfangs der Mantelfläche (22) des ersten Kupplungsteils (2) einstellbar ist, so dass ein ungewolltes, unkontrolliertes Verrutschen des äusseren Kupplungsteils (3) aus der Endposition beim Ändern des Ölspaltdrucks bei der Montage oder Demontage unmöglich wird.
Abstract:
A pneumatic collet assembly (20) has a housing (40), a piston (42), a collet (44), and ball bearings (48) . The piston (42) is disposed within the housing (40). A bore (92) within the piston (42) receives the collet (44). The collet (44) has a base (116) and fingers (120). The fingers (120) of the collet (44) define a center channel or bore (126) configured to receive a torsion bar (30). The central channel (126) extends along a longitudinal axis (38). The ball bearings (48) are disposed between the piston (42) and the fingers (120) of the collet (44). The piston (42) is configured to move between a first position along the longitudinal axis (38) and a second position along the longitudinal axis (38) in response to pressure changes within the housing (40). The piston (42) increases force against the ball bearings (48) to urge the fingers (120) of the collet (44) against the torsion bar (30) to clamp the torsion bar (30) .
Abstract:
The present invention relates to an arrangement (1) pertaining to a compressive or clamp coupling (2) in which two mating sleeves (21, 22) act compressingly against an outer surface (23a) of a shaft (23), wherein the arrangement (1) is adapted to enable a first sleeve (21), an outer sleeve, to be displaced relative to a second sleeve, an inner sleeve (22), for instance when mounting the coupling The outer sleeve (21) has an inner conical surface (21a) and the inner sleeve (22) has an outer mating conical surface (22a) and an inner shaft-adapted cylindrical surface (22b), which is dimensioned to encircle said shaft (23) in the absence of an externally applied force and with a small tolerance, so that said sleeve can be displaced axially. The occurrence of forces acting between the inner cylindrical surface of the first sleeve and the outer cylindrical surface of the shaft caused by said clamping action shall be capable of providing a torque-transferring slip-free clamp coupling (2). At least one channel (26) is adapted to deliver lubricant media or oil under high pressure to and between said mating surfaces (21a, 22a). A first means (A) is active between the outer sleeve and the inner sleeve such as to cause the outer sleeve (21) to move axially in relation to the inner sleeve (22) in a first direction (R1) (or in a second opposite direction R2) at least when a lubricant pressure and a film has been established between mutually opposing and mating slide surfaces. According to the invention, the arrangement includes a second means (B), which is adapted to provide a reduction in and/or distribution of occurring end-related and radially active compressive forces on the cylindrical shaft surface (23a) or shaft section (23d) from the end-portion or end-portions of the outer sleeve (21) via an end-portion or end-portions of said inner sleeve (22).
Abstract:
A fluid actuated clutch is provided for connecting a coaxially mounted gear on a rotating shaft. The clutch arrangement includes a post mounted on the shaft providing a fluid boundary. The post has a fluid delivery passage in fluid communication with a passage in the shaft. An applied piston is provided which is slideably mounted on the shaft and which forms a sealed control volume with the post. The control volume is exposed to the post fluid delivery passage. The apply piston has a conical engagement surface. A circumferentially segmented cone is also provided. The cone has a first engagement surface for engagement with the apply piston conical engagement surface. The post has a second engagement surface for engagement with the gear.
Abstract:
A friction coupling (1) for friction locking of a shaft (10) relative to a hub (11), comprises a radially deformable inner sleeve (2), a substantially dimensionally stable outer sleeve (3) and at least one pressure chamber (4, 5) defined by at least the inner sleeve (2) and the outer sleeve (3). The inner sleeve is arranged to be radially deformed, thereby producing a surface pressure on the shaft, for friction locking of the shaft (10) relative to the hub (11). Measuring means (9) integrated with the outer sleeve (3) is arranged to measure the strain of the outer sleeve (3), which strain is an indication of said friction locking. The above-described friction coupling can be used, for instance, in piston assemblies and press tables.
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.