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US 5,810,366 AGranted
Tool-less machine tool chuck
AssigneePower Tool Holders Incorporated
InventorsKenneth M. Montjoy, Roger J. Kanaan
Life of this patent
Estimating the term…
Abstract
The chuck includes a slitted body with an axial bore that holds the tool shank during rotation of the chuck. A gripping sleeve applies compressive pressure via cam elements to reduce the diameter of the axial bore. A spring biased locking sleeve can activate locking elements to lock the gripping sleeve to the body member in the locked position. An engagement mechanism connects the chuck to a drive spindle and also has a mounting mechanism for facilitating automated mounting of the chuck to a drive spindle.
Claims15
A quick-change chuck device for receipt of an axially extending tool shank, comprising:
- a body member defining a central longitudinal axis and having an axially disposed bore defined therein for receipt of a circular tool shank, said body member further having at least a first axially extending slit therethrough extending from a front end thereof toward a back end thereof so that at least a portion of said body member defining said bore is radially compressible;
- a gripping sleeve member disposed coaxially about said body member and axially movable relative thereto;
- an axially extending cam element channel defined between opposing surfaces of said body member and said gripping sleeve member, said channel having a first section with a first radial width and a second section with a reduced second radial width less than that of said first radial width;
- and
- a cam element axially movable within said channel by axial movement of said gripping sleeve from a gripping position wherein said cam element is disposed in said second section of said channel causing compression of said body member radially compressible section so that said bore reduces in diameter and grips upon a tool shank inserted into said bore, said gripping sleeve axially movable to a release position wherein said cam element is disposed in said first section of said channel causing radial expansion of said body member radially compressible section so that said bore increases in diameter and releases a tool shank inserted therein.
2 more elements
A quick-change chuck device for receipt of an axially extending tool shank, comprising:
- a body member defining a central longitudinal axis and having an axially disposed bore defined therein for receipt of a circular tool shank, said body member further having a plurality of circumferentially spaced axially extending slits therethrough extending from a front end thereof toward a back end thereof so that at least a portion of said body member defining said bore is radially compressible;
- a gripping sleeve member disposed coaxially about said body member and axially movable relative thereto;
- an axially extending circumferential cam element channel defined between opposing surfaces of said body member and said gripping sleeve member wherein at least one of said opposing surface comprises an axially slanted surface which is axially slanted towards said longitudinal axis, said channel having a first section with a first radial width at said axially slanted surface and a second section opposite said first section with a reduced second radial width less than that of said first radial width;
- a plurality of rolling body cam elements axially movable within said channel by axial movement of said gripping sleeve from a gripping position wherein said cam elements are disposed in said second section of said channel causing compression of said body member radially compressible section so that said bore reduces in diameter and grips upon a tool shank inserted into said bore, said gripping sleeve axially movable to a release position wherein said cam elements are disposed in said first section of said channel causing radial expansion of said body member radially compressible section so that said bore increases in diameter and releases a tool shank inserted therein;
- a manually actuated locking sleeve member disposed coaxially about and axially movable relative to said gripping sleeve, said locking sleeve member moving said gripping sleeve between said gripping position and said release position upon manual actuation thereof;
- and
- a locking element configured with said locking sleeve member and said gripping sleeve to releasably lock said gripping sleeve in said gripping position and release said gripping sleeve from said gripping position upon actuation of said locking sleeve member.
4 more elements
Dependencies are inferred from the claim text.