Patent ID: 6216977
Filing Date: 2001-04-17
Classification: B21C,B65H,F16L

Abstract:
Direct-drive coiler for winding and/or unwinding rolled strip with a drum composed of several segments which can be moved so as to be spread and which rest with conically-shaped sliding surfaces against a coiling shaft mounted rotatably cantilevered in a coiler housing, with a plunger guided in the coiler shaft, wherein the plunger is connected through a connecting flange to the drum segments, wherein an axially extending cylinder (17) is mounted in the coiler shaft (4), wherein the cylinder (17) has a piston (16) which is connected to the plunger (12) and can effect a relative axial displacement between the coiler shaft and the plunger connected to the segments for producing a spreading movement of the segments, wherein the coiler shaft (4) extends beyond the cylinder (17) with a flanged-on shaft extension (5) which closes the cylinder (17) in the direction toward the axially arranged, directly driving motor (7), and a rotary feed (8) is provided through which pressure medium can be supplied to the piston/cylinder unit (14) provided in the coiler shaft (4), characterized in that the rotary feed (8) includes a housing (23) surrounding the coiler shaft (4) and/or the shaft extension (5), wherein at least one connection (27, 28) each is provided in the housing (23) as a supply line and a discharge line and a bushing (24, 25) is mounted in the housing (23) for each supply line and discharge line, wherein the inner and outer walls of each bushing are equipped with annular ducts (29, 31) which are connected to each other through at least one essentially radially directed bore (30), wherein the outer annular ducts (29) extend under the supply and discharge connections (27, 28) of the housing (23) and discharge bores (32) provided for the coiler shaft (4) and/or the shaft extension (5) extend under the annular ducts (31).