Device for non-rotatably connecting a hollow shaft with a component

Abstract

A device which non-rotatably connects a hollow shaft with at least one component located on the hollow shaft and positioned with clearance on the hollow shaft so as to be fastened on the hollow shaft in a certain position by eliminating the clearance by expanding the hollow shaft, includes a joining tool that is passable through and expands the hollow shaft for eliminating the clearance, the joining tool has an expansion mandrel defined by at least one first shaping element and at least one further shaping element, the extension mandrel is movable inside the hollow shaft, a guide is provided for guiding the expansion mandrel during its movement inside the hollow shaft, and the shaping elements are movable relative to each other so that a motion of the shaping elements relative to each other causes at least partial expansion of the hollow shaft.

1 . A device for non-rotatably connecting a hollow shaft with at least one component located on the hollow shaft and positioned with clearance on the hollow shaft so as to be fastened on the hollow shaft in a certain position by eliminating the clearance by expanding the hollow shaft, the device comprising a joining tool that is passable through and expands the hollow shaft for eliminating the clearance, said a joining tool including an expansion mandrel defined by at least one first shaping element and at least one further shaping element, said extension mandrel being movable inside the hollow shaft; guide means guiding said expansion mandrel during its movement inside the hollow shaft, said shaping elements being movable relative to each other so that a motion of said shaping elements relative to each other causes at least partial expansion of the hollow shaft. 
     
     
         2 . A device as defined in  claim 1 , wherein said at least one first shaping element is configured as a conical mandrel with a greatest cone diameter which is smaller than an inner diameter of the hollow shaft. 
     
     
         3 . A device as defined in  claim 1 , wherein said guide means is configured as a connecting rod which is integrally formed on said first shaping element, said connecting rod being configured to make a translatory motion inside the hollow shaft via its coupling with a drive. 
     
     
         4 . A device as defined in  claim 1 , wherein said at least one further shaping element is configured as an annular bushing formed by annular segments. 
     
     
         5 . A device as defined in  claim 4 , wherein said annular segments are movable to and from in a radial direction of said annular bushing between a non-working position and at least one working position. 
     
     
         6 . A device as defined in  claim 4 , wherein said annular segments of said annular bushing are interconnected by a shared fixing means. 
     
     
         7 . A device as defined in  claim 4 , wherein said annular bushing has an outer diameter which in a non-working position is smaller than an inner diameter of the hollow shaft and, in at least one working position, it is greater than the inner diameter of the hollow shaft. 
     
     
         8 . A device as defined in  claim 4 , wherein said guide means is configured as a support tube that is associated with said further shaping element, said support tube being configured to perform a translatory motion inside the hollow shaft via its coupling with a drive. 
     
     
         9 . A device as defined in  claim 8 , wherein said drive of said support tube is frame-mounted at one end and, at another end, is coupled with a bracket fixed to said support tube, said bracket simultaneously accommodating a drive of said further shaping element. 
     
     
         10 . A device as defined in  claim 4 , wherein said annular segments of said further shaping element have inner surfaces which define a truncated conical surface with an edge inclination angle corresponding to an edge inclination angle of said first shaping element configured as a conical mandrel. 
     
     
         11 . A device as defined in  claim 1 , wherein said shaping elements and guide means associated with said shaping elements are configured in a manner selected from the group consisting of being detachably interconnected, being located such that they touch each other, and both. 
     
     
         12 . A device as defined in  claim 1 , wherein said hollow shaft is configured as a tubular shaft body of a camshaft without a large number of components designed as cams. 
     
     
         13 . A device as defined in  claim 1 , wherein said guide means have drives; and further comprising a control and evaluation unit with which said drives of said guide means are coupled, said control and evaluation unit controlling a motion of said shaping elements relative to each other as a function of characteristic curves stored in said control and evaluation unit. 
     
     
         14 . A device as defined in  claim 13 , wherein said control and evaluation unit is configured so that the characteristic curves take into account a position of the shaping elements, an edge inclination angle of said shaping elements, and material characteristics of the hollow shaft and the component. 
     
     
         15 . A device as defined in  claim 13 , wherein said control and evaluation unit is configured so that the characteristic curves include parameters selected from the group consisting of an elasticity module, density, temperature, and a material composition of an element selected from the group consisting of the hollow shaft, the components, and both.