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US 4,393,567 AGranted
Method and apparatus for the assembly of long objects on a rotating shaft
AssigneeFFV Industriprodukter AB
InventorLennart Disborg
Life of this patent
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AssigneeFFV Industriprodukter AB
InventorLennart Disborg
Estimating the term…
A method and apparatus for the assembly of long objects (1) such as rollers, cylinders, elongated tools, for example surface cutters, on a rotating shaft (2) with the aid of two expander bushings (3, 4), each an integral part made up of an inner wall (7) and an outer wall (8), which between them form a pressure cavity (9), which is filled with a liquid or plastic pressure medium, and where the expander bushings (3, 4) each have a flange (10) arranged to contact each end surface (11) of the long object (1) which shall be assembled. An axial hole (12) is partially drilled in the expander bushing's flange (10) from the surface turned toward the expander bushing (7, 8), and the axial hole (12) is connected via a channel (13) to the pressure cavity (9) and a corresponding axial hole (15) is led through the long object (1), whereafter the expander bushings (3, 4) are axially fastened against the long object (1), so that the expander bushings (3, 4) and the long object (1) form a hydraulically sealed complete system, wherein pressure can be applied from either of the expander bushings, or from one or several nipples on the elongated object (1).
Method for the assembly of long objects on a rotating shaft by using two expander bushings of the kind made up of a sealed body with an inner collar and an outer collar which form a pressure cavity between them filled with a pressure medium, and which has a means for pressurizing the pressure medium in the pressure cavity, and where the expander bushings each have a flange arranged to lie against each end surface of the long object which shall be assembled, characterized by that an axial hole is recessed partially into the flange of each expander bushing from the surface directed towards the collars, the hole being connected to a channel leading to the pressure cavity, and a corresponding axial hole is led through the long object which shall be assembled, and the expander bushings are first assembled to the end surfaces of the long object so that the expander bushings axial hole coincides with the axial hole through the long object, the axial holes and channels being filled with the same pressure medium as in the pressure cavity, whereby a hydraulic system is established between the unit comprising the expander bushings and the long object which shall be assembled.
Method of mounting long cylindrical objects on a rotatable shaft the diameter of which is less than the inner diameter of a bore through the cylindrical object by using two mirror-symmetrical expander bushings of the kind having a sealed body, an inner sleeve and an outer sleeve, and a pressure cavity between said sleeves, which cavity is filled with a pressure medium, and means for pressurizing said pressure medium in the pressure cavity and wherein each expander bushing has a radial flange, comprising each expander bushing being formed with one or more axial holes extending from the surface of the radial flange facing the sleeves of the sealed body and being in communication with the pressure cavity, providing an axial passageway through the cylindrical object, mounting the two expander bushings mirror-symmetrically on the rotatable shaft with the sleeves in the bore of the cylindrical object and with the flanges of the expander bushings in sealed engagement with the end surfaces of the cylindrical object and with the holes in said flanges in alignment and sealed communication with the axial passageway through the cylindrical object, filling the pressure cavities, the axial holes and the axial passageway with the same pressure fluid, and pressurizing the said pressure fluid from any point of the pressure fluid system, whereby the pressure fluid establishes an expansion radially inwards of the inner sleeves and an expansion radially outwards of the outer sleeves to interconnect the cylindrical object and the rotatable shaft.
Dependencies are inferred from the claim text.