GB356080A - Yielding coupling or clutch - Google Patents

Abstract

356,080. Flexible shaft couplings; claw clutches. AXIEN, L., 66, Bebelallee, Altona-on-Elbe, Germany. Jan. 9,1931, No. 821. Convention date, Jan. 10, 1930. [Class 80 (ii).] A flexible shaft coupling, which may be modified for use as a claw clutch, comprises radial blade or laminated springs acting first as cantilevers and then, under greater load, as beams supported at both ends. As arranged for bidirectional drive, the driving-member a, Fig. 2, carries pairs of projections c, c<1> with curved contact faces k, kl, these projections lying between inner and outer sets of projections e, f, Fig. 3, on the driven member b, which carries blade springs d free to oscillate about their inner ends when unloaded. Under load, the projections c or c<1> press the springs against increasing areas of the faces l or l<1> of the projections e until, as shown in Fig. 6, their ends abut .against the faces m of the projections f or of slots in a circumferential flange, whereafter the springs are bent around the faces k or k<1> of the driving-lugs. Under normal torque, clearances o, p, q remain between the springs and edges of the projections, but on considerable overload they contact with the full area of the projections and transmit drive in double shear. For dismantling, the springs are withdrawable radially on removing an enclosing- shell (not shown) for retaining the springs and lubricant. In small couplings, a single spring or pack of springs extending diametrically is used, but in larger couplings additional radial springs bearing at the centre on the diametral spring are used, as shown in Fig. 3. Radial play is provided between the projections. By increasing the spacing of the lugs c, c<1> and making one member slidable on its shaft, the coupling can be used as a claw clutch.