Rotary cutting tool
AssigneeIscar, Ltd.
InventorHanoch Guy
Life of this patent
Estimating the term…
Abstract
A chuck for clamping an article has a receiving portion including a receiving bore having a longitudinal axis L, and a radially inwardly facing contoured clamping and receiving inner surface. A clamping sleeve is accommodated in the receiving bore and is rotatable between a releasing position and a securing position. The contoured clamping and receiving surface has one or more clamping segments, each clamping segment having a ramp between a trough and a crest, a second ramp between the crest and a depression, and a third ramp between the depression and the succeeding stop ridge. Rotating the clamping sleeve within the receiving bore causes one or more rollers associated with each clamping segment to cooperate with the contoured clamping surface to effect the releasing and the securing of the article.
Claims19
A chuck (30) for releasably securing an article comprising:
- a receiving portion (34) comprising a receiving bore (42) having a longitudinal axis (L) and having a contoured clamping surface (44) having at least one clamping segment (82);
- the at least one clamping segment (82) comprising a first ramp (88) between a trough (86) and a crest (90), a second ramp (92) between the crest (90) and a depression (94), and a third ramp (96) between the depression (94) and a stop ridge (84), wherein the trough (86), crest (90), depression (94) and stop ridge (84) are respectively, at a trough distance DT, a crest distance DC, a depression distance DD and a stop ridge distance DS, from the longitudinal axis (L), wherein DS <DC<DD <DT and wherein the trough (86) defines a trough side of the first ramp (88);
- a clamping sleeve (50) accommodated in the receiving bore (42) and being rotatable between a releasing position and a securing position;
- one or more rollers (52) associated with said at least one clamping segment (82), the one or more rollers (52) being accommodated between the clamping sleeve (50) and the contoured clamping surface (44), wherein:
- when the clamping sleeve (50) is in the securing position, a first roller (52) of said one or more rollers is accommodated in the depression (94), and at least one of said one or more rollers (52) applies a radially inwardly directed force against the clamping sleeve (50) to frictionally hold the article;
- and
- when the clamping sleeve (50) is in the releasing position, said first roller (52) is located on the trough side of the first ramp (88).
A tool chuck assembly comprising:
- a receiving portion (34) comprising a receiving bore (42) having a longitudinal axis (L) and having a contoured clamping surface (44) having at least one clamping segment (82);
- a roller cage (54) having at least one through-slot (104), the roller cage (54) configured and dimensioned to be received into the receiving bore (42);
- a clamping sleeve (50) having a sleeve head (62) connected to a sleeve body (64) and a clamping hole (60), the sleeve body (64) configured and dimensioned to be received into the roller cage (54);
- and
- one or more rollers (52) configured and dimensioned to be accommodated in the least one through-slot (104) between the sleeve body (64) and the contoured clamping surface (44), when the roller cage (54) is located in the receiving bore (42) and the sleeve body (64) is located in the roller cage (54);
- wherein:
- the at least one clamping segment (82) comprises a first ramp (88) between a trough (86) and a crest (90), a second ramp (92) between the crest (90) and a depression (94), and a third ramp (96) between the depression (94) and a stop ridge (84), wherein the trough (86), crest (90), depression (94) and stop ridge (84) are respectively, at a trough distance DT, a crest distance DC, a depression distance DD and a stop ridge distance DS, from the longitudinal axis (L), wherein DS <DC<DD <DT and wherein the trough (86) defines a trough side of the first ramp (88);
- and
- the clamping sleeve (50) is adjustable between:
- a releasing position in which a first roller (52) of said one or more rollers is located on the trough side of the first ramp (88);
- and
- a securing position in which said first roller (52) is accommodated in the depression (94), and at least one of said one or more rollers (52) applies a radially inwardly directed force against the clamping sleeve (50).
Dependencies are inferred from the claim text.