Mounting device

Claim 2

A mounting device for mounting a machine element (11) having a cylindrical bore (13) coaxially on a shaft (12) having a cylindrical surface (14), said device comprising a segmented inner sleeve (21) encircling the shaft and comprising an integral member having a straight cylindrical interior bore (25) corresponding in diameter to the external cylindrical surface (14) of said shaft and having a tapered external surface and external threads (31) at one end thereof, a segmented outer sleeve (22) encircling said inner sleeve (21), said outer sleeve (22) having a tapered internal surface (34) corresponding in angle of taper to the tapered external surface of said inner sleeve (21) and having a straight cylindrical outer surface (35) corresponding in diameter to the cylindrical bore (13) of said machine element (11), and a clamping nut (23) threadedly engaged with the threaded end of said inner sleeve (21), characterised in that the segments (26) of said inner sleeve provide a plurality of terminated axial slots (27) extending longitudinally of said inner sleeve (21) each extending from one of the ends (30 and 29) of the inner sleeve (21) and terminating short of the other of the ends (29 and 30), and a single axial through-slot (27a) extending from end to end of the inner sleeve (21) to permit contraction and expansion of said interior bore (25), said segmented outer sleeve (22) comprising a plurality of separate separable segments (36) held together by said clamping nut (23), said outer sleeve (22) having circumferential interlock means (41) providing opposed forward and rearward radial surfaces (42, 43) substantially perpendicular to the central axis of said shaft (12), said clamping nut (23) having cooperating circumferential interlock means (45) defining opposed forward and rearward drive surfaces confronting the corresponding surfaces of the interlock means of said outer sleeve (22), whereby upon rotation of said nut (23) in one direction, the forward surfaces of the respective interlock means (41, 45) engage and effect relative axial displacement of said sleeves (21, 22) in one direction, and upon rotation of said nut (23) in the opposite direction, the rearward surfaces of the respective interlock means (41, 45) engage and effect relative axial displacement of said sleeves (21, 22) in the opposite direction, said displacements causing said tapered surfaces to expand and contract the interior bore (25) of the inner sleeve (21) and to contract and expand the outer surface (35) of said outer sleeve (22).

Claim 3

A device according to claim 1 wherein said outer sleeve (22) comprises three segments (36), each of which embraces approximately one-third of the circumference of said sleeve (22).

Claim 4

A device according to claim 1 or claim 2 wherein the external surface of said nut (23) is substantially cylindrical and has a diameter less than the diameter of the outer cylindrical surface (35) of said outer sleeve (22).

Claim 11

A mounting device for mounting a machine element (211) having a cylindrical bore coaxially on a shaft (212) having a cylindrical surface, said device comprising a segmented inner sleeve (221) encircling the shaft (212), an outer sleeve (222) encircling the inner sleeve (221), the two sleeves being displaceable axially relative to one another to frictionally interlock the shaft in the bore, said outer sleeve (222) being segmented and encircling said inner sleeve (221), said outer sleeve (222) having a tapered internal surface corresponding in angle of taper to a tapered external surface of said segmented inner sleeve element (221) and having a straight cylindrical outer surface corresponding in diameter to the cylindrical bore of said machine element, characterised in that said inner sleeve comprises two elements (221, 260) having a straight cylindrical interior bore corresponding in diameter to the external cylindrical surface of said shaft (212), one of said elements (221) being segmented and having a tapered external surface, the segments (226) of said segmented element providing slots (272) extending longitudinally of said sleeve to permit contraction and expansion of the interior bore of said segmented element, said segmented element being provided adjacent the other inner sleeve element (260) with connecting means (263, 276) to unite said segmented element with said other inner sleeve element, said segmented outer sleeve (222) comprising a plurality of separate separable segments, the other (260) of said inner sleeve elements having external threads (262) at one end and complementary connecting means to unite said threaded inner sleeve element with said segmented inner sleeve element, the end of said outer sleeve (222) which is adjacent said external threads (262) of said inner sleeve having circumferential interlock means providing opposed forward and rearward radial surfaces substantially perpendicular to the central axis of said shaft, and a clamping nut (223) is threadedly engaged with the threaded inner sleeve element (260), said clamping nut having cooperating circumferential interlock means defining opposed forward and rearward drive surfaces confronting the corresponding surfaces of the interlock means of said outer sleeve (222), whereby upon rotation of said clamping nut (223) in one direction, the forward surfaces of the respective interlock means engage and effect relative axial displacement of said sleeves in one direction, and upon rotation of said clamping nut in the opposite direction, the rearward surfaces of the respective interlock means engage and effect relative axial displacement of said sleeves in the opposite direction, said displacements causing said tapered surfaces to expand and contract the interior bore of said segmented inner sleeve element (221) and to contract and expand the exterior surface of said outer sleeve (222).

Claim 12

A mounting device for mounting a machine element (211) having a cylindrical bore coaxially on a shaft (212) having a cylindrical surface, said device comprising a segmented inner sleeve (221) encircling the shaft (212), an outer sleeve (222) encircling the inner sleeve (221), the two sleeves being displaceable axially relative to one another to frictionally interlock the shaft in the bore, said outer sleeve (222) being segmented and encircling said inner sleeve (221), said outer sleeve (222) having a tapered internal surface corresponding in angle of taper to a tapered external surface of said segmented inner sleeve element (221) and having a straight cylindrical outer surface corresponding in diameter to the cylindrical bore of said machine element, characterised in that said inner sleeve comprises two elements (221, 260) having a straight cylindrical interior bore corresponding in diameter to the external cylindrical surface of said shaft (212), one of said elements (221) being segmented and having a tapered external surface, the segments (226) of said segmented element providing slots (272) extending longitudinally of said sleeve to permit contraction and expansion of the interior bore of said segmented element, said segmented element being provided adjacent the other inner sleeve element (260) with connecting means (263, 276) to unite said segmented element with said other inner sleeve element, said segmented outer sleeve (222) comprising a plurality of separate separable segments, the other (260) of said inner sleeve elements having external threads (262) at one end and complementary connecting means to unite said threaded inner sleeve element with said segmented inner sleeve element, the end of said outer sleeve (222) which is adjacent said external threads (262) of said inner sleeve having circumferential interlock means providing opposed forward and rearward radial surfaces substantially perpendicular to the central axis of said shaft, and a clamping nut (223) is threadedly engaged with the threaded inner sleeve element (260), said clamping nut having cooperating circumferential interlock means defining opposed forward and rearward drive surfaces confronting the corresponding surfaces of the interlock means of said outer sleeve (222), whereby upon rotation of said clamping nut (223) in one direction, the forward surfaces of the respective interlock means engage and effect relative axial displacement of said sleeves in one direction, and upon rotation of said clamping nut in the opposite direction, the rearward surfaces of the respective interlock means engage and effect relative axial displacement of said sleeves in the opposite direction, said displacements causing said tapered surfaces to expand and contract the interior bore of said segmented inner sleeve element (221) and to contract and expand the exterior surface of said outer sleeve (222).

Claim 13

A device according to claim 10 wherein the connecting means of said threaded inner sleeve element (260) comprises an outwardly- projecting rim (263), said connecting means of said segmented inner sleeve element (221) comprising a groove (276) in the cylindrical bore receiving said rim (263).