Junction between two components of a rotating tool system

Abstract

A junction between two components of a tool system, that rotates about an axis of rotation, includes a conical seat, on the first component, coaxial to the axis of rotation and which is defined by an annular front face. The second component carries a coupling having a conical surface complementary to the conical seat and an annular end face resting against the front face. A tie bolt axially projects beyond the free end of the coupling pin and engages, in a cavity adjacent to the seat. The junction also has tensioning elements that are actuated from the exterior for mutually bracing the components, which are radially guided in the first component, and which act upon the tie bolt and are functionally linked with joint actuating means for adjustment between detached and tensioned positions. The tensioning elements include ejection portions that can be fitted with a rotatably received rolling element.

1 . Joint between two sub-elements of a tool system which rotates about a rotational axis, in particular for use in machine tools, comprising: an at least partially conical receiver, which is arranged on a first sub-element and is coaxial with the rotational axis, and which is delimited by an annular end face; a coupling part, which is arranged on a second sub-element and has a coupling pin with a conical surface which is complementary to the conical receiver, and has an annular plane surface which faces towards the annular end face and which, in the coupled state, bears against the latter; a tie bolt  36 , which projects axially over the free end of the coupling pin and which in the coupled state engages in a cavity adjoining the receiver; and clamping means, which can be actuated from the outside, for the purpose of mutual clamping of the sub-elements, which clamping means have two clamping elements routed radially in the first sub-element which are arranged opposite each other relative to the rotational axis and in a clamping position carry wedge surfaces which engage beneath a conical portion of the tie bolt that is concentric with the rotational axis, and which are operatively connected to common actuating means, which are adjustable between a release position and a clamping position, wherein the clamping elements are provided with ejector portions which, in the releasing of the clamping elements from the clamping position, with the exertion of an axial force acting in the ejection direction of the coupling part, strike against an active surface of the tie bolt which faces towards the clamping elements and a rotary driving portion is arranged in an intermediate region between the end face and the plane surface on the one hand and between the conical receiver and the conical surface on the other hand. 
     
     
         2 . Joint according to  claim 1 , wherein the rotary driving portions of the receiver and of the coupling pin are realized as polygonal surfaces which are complementary to each other.