摘要:
The present invention relates to a pneumatic expandable shaft, of the type composed of a hollow cylinder (1) and a plurality of gripping elements (6) emerging from openings (2) present on the surface of said cylinder (1), the latter comprising at least one inflatable cushion (3) located underneath said gripping elements (6) and being provided with at least one check valve (5) for the inflating fluid mounted with its actuating stem (5c) arranged radially with respect to the axis of the shaft, as well as an annular chamber (7) for distribution of compressed air to said valve (5) and a first duct (8) for introducing air into said chamber (7), said annular chamber (7) housing a resilient annular element (9), deformable by the action of a fluid under pressure, and apt, upon being deformed, to press against said actuating stem (5c) in a direction substantially parallel to its axis.
摘要:
The invention relates to an axially sliding expanding shaft, of the type rotatably mounted in cantilever fashion on a support structure of a winding/unwinding machine, comprising a main shaft coupled with an expanding cylinder provided with extractable gripping elements apt to retain the core of a reel mounted on the expanding shaft, and rod means, which is arranged longitudinally inside the main shaft and the expanding cylinder and is free in rotation with respect to these latters, and which is mounted stationary in rotation and is apt to cooperate with an adjusting portion of the expanding cylinder/main shaft assembly and with an adjusting element, whereby it is able to cause the sliding of the expanding cylinder.
摘要:
The invention relates to an axially sliding expanding shaft, of the type rotatably mounted in cantilever fashion on a support structure of a winding/unwinding machine, comprising a main shaft (12) coupled with an expanding cylinder (11) provided with extractable gripping elements apt to retain the core of a reel mounted on the expanding shaft, and rod means (21), which is arranged longitudinally inside the main shaft and the expanding cylinder (11) and is free in rotation with respect to these latters, and which is mounted stationary in rotation and is apt to cooperate with an adjusting portion of the expanding cylinder/main shaft assembly and with an adjusting element, whereby it is able to cause the sliding of the expanding cylinder (11).
摘要:
Expandable shaft for supporting bobbins, of the type comprising a hollow cylinder (1), housing inside it a plurality of locking modules (Mi) and having, corresponding with each of these modules (Mi), a plurality of short openings (3) distributed circumferentially over its surface, through which retractable blocks (2) are made to emerge, each module (Mi) having an axially slidable thrusting element (5) which engages with said blocks (2) by means of surfaces (6) inclined with respect to the longitudinal axis of the shaft, a spline (4) which extends longitudinally substantially over the whole length of the shaft being fixed externally onto each plurality of blocks (2) of the modules (Mi) corresponding to one another in an axial alignment.
摘要:
The present invention relates to a self-centering expanding shaft with a composite system - of the type comprising a structural cylinder, equipped with a pneumatic expanding system to block a reel and housing at least one pneumomechanical module to center the reel, said pneumomechanical module comprising a pair of opposed slidable thrust elements (3), coupled with gripping elements (4) apt to be extracted from and withdrawn into said structural cylinder (1), and two pressure chambers (8a,8b) positioned at its ends, in which said two pressure chambers (8a,8b) are connected through a single pneumatic line (10) which crosses the two thrust elements (3), the extraction of said gripping elements (4) being obtained by supplying compressed air into said compression chambers (8a,8b), and in that, at least an elastic element (7) is provided to act on said thrust elements (3) so as to reset the conditions of rest.
摘要:
A composite expanding shaft comprising a pneumatic expanding blocking system of a bobbin and a pneumechanic centering system is disclosed, wherein the pneumechanic system comprises at least a movable thrust element (3ai) operated by a fluid under pressure supplied into an expansion chamber (4), a first passage way (8a) being apt to connect said expansion chamber (4) to an inflation duct (11) of the pneumatic system, and comprising further an obstructing means (9a) of said first passage way (8a), jointly movable with said thrust element (3ai) of the centering system, apt to keep closed said first passage way (8a) for at least a predetermined portion of the thrust element stroke.
摘要:
A composite expanding shaft comprising a pneumatic expanding blocking system of a bobbin and a pneumechanic centering system is disclosed, wherein the pneumechanic system comprises at least a movable thrust element operated by a fluid under pressure supplied into an expansion chamber, a first passage way being apt to connect said expansion chamber to an inflation duct of the pneumatic system, and comprising further an obstructing means of said firts passage way, jointly movable with said thrust element of the centering system, apt to keep closed said first passage way for at least a predetermined portion of the thrust element stroke.
摘要:
The present invention relates to a self-centering expanding shaft with a composite system - of the type comprising a structural cylinder, equipped with a pneumatic expanding system to block a reel and housing at least one pneumomechanical module to center the reel, said pneumomechanical module comprising a pair of opposed slidable thrust elements (3), coupled with gripping elements (4) apt to be extracted from and withdrawn into said structural cylinder (1), and two pressure chambers (8a,8b) positioned at its ends, in which said two pressure chambers (8a,8b) are connected through a single pneumatic line (10) which crosses the two thrust elements (3), the extraction of said gripping elements (4) being obtained by supplying compressed air into said compression chambers (8a,8b), and in that, at least an elastic element (7) is provided to act on said thrust elements (3) so as to reset the conditions of rest.
摘要:
The invention relates to an axially sliding expanding shaft, of the type mounted in cantilever fashion on a support structure, comprising a main shaft coupled with an expanding cylinder (11) provided with extractable gripping elements designed to retain the core of a reel mounted on the expanding shaft, in which said main shaft (12), on the one hand, is locked in rotation and in translation with said expanding cylinder (11) and, on the other hand, is slidable inside a bearing member (13) mounted rotatably on said support structure, adjusting means (16) for controlling the relative sliding movement between said main shaft (12) and said bearing member (13) also being provided; preferably the adjusting means (16) remain static so as to allow adjustment also with the shaft (12) rotating.