US 4,594,036 A · Quick change tool chuck system

A quick change tool chuck which holds, centers, and drives any given tool of a set of tools having various shank diameters with each such shank diameter being uniform along the length of the shank and with each such shank having a round portion to be held and centered by the chuck, each such shank further having at least one planar portion extending parallel to the axis of rotation of the tool, to be positively driven by the chuck, with each such planar portion being recessed the same depth in each tool of the set of tools relative to the surface of the round portion thereof, said chuck comprising:

(a) two jaw means for holding, centering, and driving any given tool of the set, each of said jaw means having an inner face defined by multiple intersecting planar surfaces which are parallel to the axis of rotation of the chuck, each of said inner faces comprising a holding and centering portion including plural intersecting planar surfaces parallel to the axis of rotation of the chuck, such holding and centering portions of the jaw means functioning to hold and center any given tool of the set on the axis of rotation of the chuck by making multiple contacts with the round portion of the shank of any given tool of the set, said line contacts being parallel to the axis of rotation of the chuck, and at least one of said jaw inner faces also having a driving portion comprising at least one planar driving surface parallel to and inset toward the axis of rotation of the chuck relative to the holding and centering portion of the inner face thereof, each such planar driving surface functioning to contact and securely, nonrotatively seat the jaw means against a recessed planar portion of the shank of any given tool of the set;
and
(b) means for carrying said jaw means and enabling lateral movement of said jaw means with respect to the axis of rotation of the chuck, said carrying means having means for connecting the chuck to a power source;
(c) means for biasing said jaw means away from the axis of rotation of the chuck;
and
(d) means for urging said jaw means together into contacting relationship with the shank of a given tool.

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A quick change tool chuck which holds, centers, and drives any given tool of a set of tools having various shank diameters with each such shank diameter being uniform along the length of the shank and with each such shank having a round portion to be held and centered by the chuck, each such shank further having at least one planar portion extending parallel to the axis of rotation of the tool, to be positively driven by the chuck, with each such planar portion being recessed the same depth in each tool of the set of tools relative to the surface of the round portion thereof, said chuck comprising:

(a) a cylindrical housing means having a lateral aperture means for receving two diametrically opposed jaw means, said housing means having a central axial aperture means for receiving the shank of any given tool of the set, said housing means having means for connecting the chuck to a power source;
(b) two jaw means for holding, centering, and driving the shank of any given tool of the set, said jaw means being diametrically opposed and laterally movable within said housing means, each of said jaw means having an outer surface which is sloped with respect to the axis of rotation of said chuck, each of said jaw means having an inner face defined by multiple intersecting planar surfaces which are parallel to the axis of rotation of the chuck, each of said inner faces comprising a holding and centering portion including plural intersecting planar surfaces parallel to the axis of rotation of the chuck, such holding and centering portions of the jaw means functioning to hold and center any given tool of the set on the axis of rotation of the chuck by making multiple line contacts with the round portion of the shank of any given tool of the set, said line contacts being parallel to the axis of rotation of the chuck, and at least one of said jaw inner faces also having a driving portion comprising at least one planar driving surface parallel to and inset toward the axis of rotation of the chuck relative to the holding and centering portion of the inner face thereof, each such planar driving surface functioning to contact and securely, nonrotatively seat the jaw means against a recessed planar portion of the shank of any given tool of the set;
and
(c) spring means positioned to exert lateral force to push apart said jaw means;
(d) a cylindrical sleeve means slidably positioned over said housing means, said sleeve means having two diametrically opposed wedge members positioned on the inner surface thereof, each of said wedge members having an inner surface which is sloped with respect to the axis of rotation of said chuck, the inner surface of each wedge member being at least partially in contact with the complementary outer surface of a jaw means;
and
(e) spring means positioned in said housing means to exert force longitudinally against said wedge members in said sleeve means to push said wedge members against said jaw means.

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A quick change tool chuck which holds, centers, and drives any given tool of a set of tools having various shank diameters with each such shank diameter being uniform along the length of the shank and with each such shank having a round portion to be held and centered by the chuck, each such shank further having at least one planar portion extending parallel to the axis of rotation of the tool, to be positively driven by the chuck, with each such planar portion being recessed the same depth in each tool of the set of tools relative to the surface of the round portion thereof, said chuck comprising:

(a) a cylindrical housing means having a lateral aperture means for receiving two diametrically opposed jaws means, said housing means having a central axial aperture means for receiving the shank of any given tool of the set;
(b) two jaw means for holding, centering, and driving the shank of any given tool of the set, said jaw means being diametrically opposed and laterally movable within said housing means, each of said jaw means having an outer surface which is sloped with respect to the axis of rotation of said chuck, each of said jaw means having an inner face defined by multiple intersecting planar surfaces which are parallel to the axis of rotation of the chuck, each of said inner faces comprising a holding and centering portion including plural intersecting planar surfaces parallel to the axis of rotation of the chuck, such holding and centering portions of the jaw means functioning to hold and center any given tool of the set on the axis of rotation of the chuck by making multiple line contacts with the round portion of the shank of any given tool of the set, said line contacts being parallel to the axis of rotation of the chuck, and at least one of said jaw inner faces also having a driving portioncomprising at least one planar driving surface parallel to and inset toward the axis of rotation of the chuck relative to the holding and centering portion of the inner face thereof, each such planar driving surface functioning to contact and securely, nonrotatively seat the jaw means against a recessed planar portion of the shank of any given tool of the set;
and
(c) spring means positioned to exert lateral force to push apart said jaw means;
(d) a cylindrical sleeve means slidably positioned over said housing means, said sleeve means having two diametrically opposed wedge members positioned on the inner surface thereof, each of said wedge members having an inner surface which is sloped with respect to the axis of rotation of said chuck;
and
(e) a cylindrical cap means positioned at least partially within said sleeve means, said cap means having means for connecting the chuck to a power source, said cap means being connected to said housing means, said cap means including spring means positioned toexert force longitudinally against said wedge members in said sleeve means to push said wedge members aginst said jaw means.

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A quick change tool chuck comprising:

(a) a cylindrical housing means having a lateral aperture means for receiving two diametrically opposed jaw means, said housing means having a central axial aperture means for receiving the shank of a tool;
(b) two jaw means for gripping the shank of a tool, said jaw means being diametrically opposed and laterally movable within said housing means, each of said jaw means having an outer surface which is sloped with respect to the axis of rotation of said chuck, each of said jaw means having an inner surface formed by two spaced apart pairs of intersecting planes which are parallel to the axis of rotation of said chuck, the first pair of said intersecting planes forming multiple driving surfaces for rotating the shank of a tool, the second pair of said intersecting planes forming multiple holding surfaces for clamping the shank of a tool;
(c) spring means positioned to exert lateral force to push apart said jaw means;
(d) a cylindrical sleeve means slidably positioned over said housing means, said sleeve means have two diametrically opposed wedge members positioned on the interior surface thereof, each of said wedge members having an inner surface which is sloped with respect to the axis of rotation of said chuck, the inner surface of each wedge member being at least partially in contact with the complementary outer surface of a jaw means;
(e) a cylindrical cap means positioned at least partially within said sleeve means, said cap means having means for connecting to a power source, said cap means being connected to said housing means, said cap means including spring means positioned to exert force longitudinally against said wedge members in said sleeve means to push said wedge members against said jaw means;
(f) a deformable locking ring means, said locking ring means being positioned on said cylindrical cap means, said locking ring means being located above said sleeve means, said locking ring means having an elliptical bore which binds on said cap means;
and
(g) a lifting ring means being slidably positioned on said cylindrical cap means, said lifting ring means being located above said locking ring means, said lifting ring means having means to lift said locking ring means to unbind said locking ring means from said cap means.

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A quick change tool chuck comprising:

(a) a cylindrical housing means having a lateral aperture means for receiving two diametrically opposed jaw means, said housing means having a central axial aperture means for receiving the shank of a tool;
(b) two jaw means for gripping the shank of a tool, said jaw means being diametrically opposed and laterally movable within said housing means, each of said jaw means having an outer surface which is sloped with respect to the axis of rotation of said chuck, each of said jaw means having an inner surface formed by two spaced-apart pairs of intersecting planes which are parallel to the axis of rotation of said chuck, the first pair of said intersecting planes forming multiple driving surfaces for rotating the shank of a tool, the second pair of said intersecting planes forming multiple holding surfaces for clamping the shank of a tool;
(c) spring means positioned to exert lateral force to push apart said jaw means;
(d) a cylindrical sleeve means slidably positioned over said housing means, said sleeve means have two diametrically opposed wedge members positioned on the interior surface thereof, each of said wedge members having an inner surface which is sloped with respect to the axis of rotation of said chuck, the inner surface of each wedge member being at least partially in contact with the complementary outer surface of a jaw means;
(e) a cylindrical cap means positioned at least partially within said sleeve means, said cap means having means for connecting to a power source, said cap means being connected to said housing means, said cap means including spring means positioned to exert force longitudinally against said wedge members in said sleeve means to push said wedge members against said jaw means;
(f) a deformable locking ring means, said locking ring means being positioned on said cylindrical cap means, said locking ring means being located above said sleeve means, said locking ring means having an elliptical bore which binds on said cap means;
and
(g) a lifting ring means being slidably positioned over said cylindrical sleeve means and over said locking ring means, said lifting ring means having means to lift said locking ring means to unbind said locking ring means from said cap means.

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A quick change tool chuck comprising:

(a) a cylindrical housing means having a lateral aperture means for receiving two diametrically opposed jaw means, said housing means having a central axial aperture means for receiving the shank of a tool, said housing means having means for connecting to a power source;
(b) two jaw means for gripping the shank of a tool, said jaw means being diametrically opposed and laterally movable within said housing means, each of said jaw means having an outer surface which is sloped with respect to the axis of rotation of said chuck, each of said jaw means having an inner surface formed by two spaced apart pairs of intersecting planes which are parallel to the axis of rotation of said chuck, the first pair of said intersecting planes forming multiple driving surfaces for rotating the shank of a tool, the second pair of said intersecting planes forming multiple holding surfaces for clamping the shank of a tool;
(c) spring means positioned to exert lateral force to push apart said jaw means;
(d) a cylindrical sleeve means slidably positioned over said housing means, said sleeve means having two diametrically opposed wedge members positioned on the interior surface thereof, each of said wedge members having an inner surface which is sloped with respect to the axis of rotation of said chuck, the inner surface of each wedge member being at least partially in contact with the complementary outer surface of a jaw means;
(e) spring means positioned in said housing means to exert force longitudinally against said wedge members in said sleeve means to push said wedge members against said jaw means;
(f) a deformable locking ring means, said locking ring means being positioned on said cylindrical housing means, said locking ring means being located above said sleeve means, said locking ring means having an elliptical bore which binds on said housing means;
and
(g) a lifting ring means being slidably positioned over said cylindrical sleeve means and over said locking ring means, said lifting ring means having means to lift said locking ring means to unbind said locking ring means from said housing means.

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