Patent ID: 7837406
Filing Date: 2010-11-23
Classification: B23P,F05B,F16D,Y10T

Abstract:
1. A shrinkage disc unit assembly, comprising: a) a rotational body comprising a circumferential outer surface; b) a hub surrounding the rotational body and comprising a circumferential inner surface which together with the circumferential outer surface forms an inclined joint between the rotational body and the hub, wherein the hub can be shrunk onto the rotational body at the joint; c) a fluid channel leading through the rotational body or the hub, for charging the joint with a pressurized fluid; d) and a fixing assembly which is formed by one of the rotational body and the hub, alone or in combination with the other, and by means of which a tool can be axially supported either on the rotational body or the hub and fixed only in a predetermined rotational angular position on the rotational body and/or the hub, for assembling and/or disassembling the hub e) wherein the rotational body and/or the hub is or are configured such that it is only possible to press a pressurized fluid into the joint when the tool is mounted at the predetermined rotational angular position on the rotational body and/or the hub; and f) wherein said tool comprises a) a fixing structure for positioning the tool on the rotational body or the hub at the predetermined rotational angle position and axially supporting the tool on one of the rotational body and the hub; b) a pressure element or tensile element, supported by the fixing structure such that it can be moved, by means of which, when a fixing part is axially supported on one of the rotational body and the hub, the other of the rotational body and the hub can be charged with an axial force; and c1) a fluid channel formed in the tool and, when the tool is fixed, connected to the fluid channel of the shrinkage disc unit such that the joint can be charged with the pressurized fluid through the fluid channel of the tool, or c2) a sealing mechanism formed by the tool, for sealing off the fluid channel of the shrinkage disc unit;