Symmetrical hub-to-shaft connection

Claim 1

In a symmetrical hub-to-shaft clamping connection, to secure a hub (7) on a shaft (6), a pair of inner clamping rings (1, 1a) having outer, oppositely directed conical surfaces; a pair of outer clamping rings (2, 2) having inner oppositely directed, matching conical surfaces, and outer cylindrical surfaces for clamping the rings to the hub; axial bores penetrating through said clamping rings, and clamping bolts (5) threaded in the bores to axially clamp the inner and outer rings against each other and engage said conical surfaces; wherein the improvement comprises a cylindrical relieved suRface (1b) formed on the inner surface of the clamping rings (1, 1a); a ring-shaped cutout (2a) formed in the facing surface of the outer clamping rings (2); sleeve members (3) seated in cylindrical relieved surfaces (1b) and made of a material which is soft with respect to the shaft, or the clamping rings, respectively, to prevent scoring in case of slippage of the shaft with respect to the rings, said sleeve members being secured in the inner clamping ring by means of an interference fit, and being formed with outwardly directed flanges (3a) fitting radially around the inner end surfaces of the inner rings (1, 1a) and into said ring-shaped cutout (2a) of the outer rings (2); an axially slit ring (4) of U-shaped cross section engaging the outer clamping rings (2) adjacent the facing surfaces to secure the rings into a single assembly; and terminal flanges (1c) formed adjacent the outer end faces of the rings (1, 1a).