Mounting device

A device for coaxially mounting a machine element having a tapered bore upon a shaft comprising:

• (a) an inner sleeve for encircling the shaft, the inner sleeve having a tapered external surface and an interior bore corresponding in dimensions to the shaft, the inner sleeve having a plurality of segments for providing a plurality of terminated axial slots extending longitudinally from one end and terminating short of the other end of the inner sleeve and an axial slot extending longitudinally from one end to the other end of the inner sleeve to permit contraction of the interior bore, the inner sleeve also having external threads at one end of the inner sleeve;
• (b) an outer sleeve for encircling the inner sleeve comprising a plurality of segments, the outer sleeve having a tapered internal surface corresponding in angle of taper to the tapered external surface of the inner sleeve and a tapered external surface corresponding to the tapered bore of the machine element, abutment means on said outer sleeve for engaging the machine element and positioning the same at a fixed axial position relative to the outer sleeve, the outer sleeve having a circumferential interlock means providing a forward radial surface;
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• (c) a nut having interior threads and a circumferential interlock means having a forward drive surface such that upon rotation of the nut the interior threads of the nut engage with the external threads of the inner sleeve effecting axial displacement of the inner sleeve in one direction relative to the nut and the forward drive surface of the nut engages with the forward radial surface of the outer sleeve effecting axial displacement of the outer sleeve in an opposite direction, the displacements causing the interior bore of the inner sleeve to contract against the shaft and the tapered external surface of the outer sleeve to expand against the tapered bore of the machine element while it is in said fixed axial position.

A device for coaxially mounting a machine element having a tapered bore upon a cylindrical shaft comprising:

• (a) an inner sleeve for encircling the cylindrical shaft, the inner sleeve having a tapered external surface and an interior bore corresponding in diameter to the cylindrical shaft, the inner sleeve having a plurality of segments for providing a plurality of terminated axial slots extending longitudinally from one end and terminating short of the other end of the inner sleeve and an axial slot extending longitudinally from one end to the other end of the inner sleeve to permit contraction of the interior bore, the inner sleeve also having external threads at one end of the inner sleeve;
• (b) an outer sleeve for encircling the inner sleeve comprising three segments, each of which embraces approximately one-third of the circumference of the inner sleeve, the outer sleeve having a tapered internal surface corresponding in angle of taper to the tapered external surface of the inner sleeve and a tapered cylindrical external surface corresponding in diameter to the tapered bore of the machine element, the outer sleeve having a circumferential groove in the exterior surface of the outer sleeve, the outer sleeve also having a circumferential external flange at the small end of its tapered external surface for maintaining the machine element at a fixed position relative to the outer sleeve;
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• (c) a nut having interior threads for engagement with the external threads of the inner sleeve and a circumferential flange in the interior surface of the nut for engagement with the circumferential groove of the outer sleeve, such that upon rotation of the nut the interior threads of the nut engage with the external threads of the inner sleeve effecting axial displacement of the inner sleeve in one direction and the flange of the nut engages with the groove of the outer sleeve effecting axial displacement of the outer sleeve in an opposite direction, the displacements causing the interior bore of the inner sleeve to contract against the cylindrical shaft and the tapered cylindrical external surface of the outer sleeve to expand against the tapered bore of the machine element.

In combination with a machine element having a tapered bore, said element being selected from a group consisting of pulleys and gears, and a cylindrical shaft positioned coaxially within said tapered bore, a device consisting essentially of:

• (a) an inner sleeve for encircling the shaft, the inner sleeve having a tapered external surface corresponding to the tapered bore of a machine element and an interior bore corresponding in diameter to the shaft, the inner sleeve having a plurality of segments for providing a plurality of terminated axial slots extending longitudinally from one end and terminating short of the other end of the inner sleeve and an axial slot extending longitudinally from one end to the other end of the inner sleeve to permit contraction of the interior bore, the inner sleeve also having external threads at one end of the inner sleeve;
• (b) an outer sleeve for encircling the inner sleeve comprising a plurality of segments, the outer sleeve having a tapered internal surface corresponding in angle of taper to the tapered external surface of the inner sleeve and a tapered external surface corresponding to the tapered bore of the machine element, the outer sleeve having a circumferential interlock means providing a forward radial surface and a circumferential external flange at the small end of its tapered external surface for maintaining the machine element at a fixed axial position relative to said outer sleeve;
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• (c) a nut having interior threads and a circumferential interlock means having a forward drive surface such that upon rotation of the nut the interior threads of the nut engage with the external threads of the inner sleeve effecting axial displacement of the inner sleeve in one direction relative to the nut and the forward drive surface of the nut engages with the forward radial surface of the outer sleeve effecting axial displacement of the outer sleeve in an opposite direction, the displacements causing the interior bore of the inner sleeve to contract against the shaft and the tapered external surface of the outer sleeve to expand against the tapered bore of the machine element.