MOUNTING DEVICE FOR MOUNTING NARROW MACHINE ELEMENTS ON A SHAFT

摘要

A mounting device for coupling two rotatable elements is provided. Specifically, a device for mounting a machine element onto a shaft, and in particular for mounting a narrow machine element on to a shaft, is provided. In one embodiment, the device includes a radially deformable inner sleeve that cooperates with an outer sleeve. A locking nut threads onto the inner sleeve to displace a thrust plate toward the outer sleeve so that the machine element is clamped between the thrust plate and the outer sleeve. In another embodiment, the device includes opposing pairs of inner and outer sleeves having mating tapered surfaces to provide axial clamping force and radial clamping force. The machine element is axially clamped between the pairs of inner and outer sleeves.

主权项

1. A mounting device for coupling a first rotatable element having an external surface and a second rotatable element having an internal bore and first and second sides, wherein the device comprises:
a hollow inner sleeve having an internal bore to cooperate with the external surface of the first rotatable element, comprising:
a threaded portion;a tapered surface; andat least one axial slot extending along a portion of the inner sleeve adjacent the tapered surface 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 second rotatable 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 first rotatable element, wherein the clamping plate has a side surface for engaging the second side of the second rotatable element; and a locking element having a threaded portion for threadedly engaging the threaded portion of the inner sleeve; wherein rotating the locking element in a first direction displaces the clamping plate axially relative to the inner 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 second rotatable 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 onto the external surface of the first rotatable element.