Mounting device for mounting narrow machine elements on a shaft

A mounting device for coupling a shaft having an external surface and a machine element having an internal bore and first and second sides, wherein the device comprises:

• a hollow inner sleeve having an internal bore to overlie the external surface of the shaft, comprising:
• an internally threaded socket;
• a tapered surface;
• and
• at least one axial slot to permit radial expansion and contraction of the inner sleeve;
• an outer sleeve comprising:
• an internal bore having a tapered surface engaging the tapered surface of the inner sleeve;
• a side wall transverse the internal bore, wherein the side wall has an engagement surface for engaging the first side of the machine element;
• wherein the outer sleeve is substantially rigid radially such that the outer sleeve resists radial expansion or contraction in response to a radial load;
• a clamping plate having a bore to fit over the external surface of the shaft, wherein the clamping plate has a side surface for engaging the second side of the machine element;
• and
• a locking element having a threaded portion for threadedly engaging the threaded socket of the inner sleeve;
• wherein rotating the locking element in a first direction to tighten the device displaces the clamping plate axially relative to the outer sleeve so that the side surface of the clamping plate and engagement surface of the outer sleeve clamp onto the first and second sides of the machine element and rotating the locking element in the first direction also displaces the tapered surface of the inner sleeve relative to the internal tapered surface of the outer sleeve creating a radially directed clamp force that deforms the inner sleeve radially inwardly to clamp the device onto the external surface of the shaft.

A mounting device for coupling a shaft having an external surface and a machine element having an internal bore and first and second sides, wherein the device comprises:

• a clamping plate having a bore to fit over the external surface of the shaft, wherein the clamping plate has a side surface for engaging the first side of the machine element;
• and
• an axial protrusion having at least one axial slot to permit radial expansion and contraction of the protrusion
• a hollow inner sleeve having an internal bore to overlie the external surface of the axial protrusion of the clamping plate, comprising:
• an internally threaded socket;
• a tapered surface;
• and
• at least one axial slot to permit radial expansion and contraction of the inner sleeve;
• an outer sleeve comprising:
• an internal bore having a tapered surface engaging the tapered surface of the inner sleeve;
• a side wall transverse the internal bore, wherein the side wall has an engagement surface for engaging the first side of the machine element;
• an alignment element engaging the internal bore of the machine element to align the machine element relative to the shaft;
• wherein the outer sleeve is substantially rigid radially such that the outer sleeve resists radial expansion or contraction in response to a radial load;
• a locking element having a threaded portion for threadedly engaging the threaded socket of the inner sleeve;
• wherein rotating the locking element in a first direction to tighten the device displaces the inner sleeve axially relative to the clamping plate so that the tapered surface of the inner sleeve engages the tapered surface of the outer sleeve so that the side surface of the clamping plate and engagement surface of the outer sleeve clamp axially onto the first and second sides of the machine element and the wedging tapers create a radially directed clamp force between the inner surface of the inner sleeve and the outer surface of the axial protrusion of the clamping plate which deforms the axial protrusion of the clamping plate to clamp the device onto the external surface of the shaft.