A chuck assembly includes a chuck body rotatable about an axis, a plurality of jaws each received within a slot of the chuck body for co-rotation with the chuck body about the axis, a wedge engageable with an outer surface of each jaw, a pusher coupled to the plurality of jaws to bias the plurality of jaws in a forward direction into engagement with the wedge, and a tightening sleeve threadably coupled to the chuck body for relative rotation with the chuck body. The tightening sleeve includes a clamping surface engageable with the wedge for inwardly displacing the plurality of jaws in a radial direction, causing the plurality of jaws to secure a tool bit received within the chuck assembly, in response to rotation of the tightening sleeve relative to the chuck body in a tightening direction.

A chuck (10) has a body (14), a plurality of jaws (22), and a rotatable nut (16). A sleeve (18) is rotatable between a first rotational position and a second rotational position with respect to the nut. An annular array of first teeth (84) are non-rotatable with respect to the body. One or more second teeth (63) are non-rotatable with respect to the nut and axially movable with respect to the body. When the teeth engage, they resist the nut's rotation in the opening direction. An engagement between the sleeve and the one or more second teeth moves the one or more second teeth out of engagement with the first teeth when the sleeve moves from the second rotational position to the first rotational position and moves the one or more second teeth into engagement with the first teeth when the sleeve moves from the first rotational position to the second rotational position.

A chuck includes a body having a nose section with an axial bore and a plurality of passageways formed therein, and a plurality of jaws disposed in the passageways. A nut for driving the jaws is rotatably mounted about the body and a sleeve defining a first recess and a second recess is rotatable with respect to the nut between a first rotational position and a second rotational position. An array of locking teeth is fixed to the body and a pawl member with an engagement portion is non-rotatably fixed to the nut. The engagement portion is received in the second recess and engages the locking teeth when the sleeve is in the second rotational position, the engagement portion being compressed so that an amount of force is exerted on the nut in the closing direction by the engagement portion.

The chuck with locking device has a ratchet mechanism comprising a toothed ring with engagement teeth fixed to one of an outer casing and a base body. A ratchet pawl is coupled to the toothed ring when a locking control sleeve is in a locking position and the locking pawl is separated from the tooth ring when the locking control sleeve is in a release position. A release elastic element is arranged under compression between the outer casing and a locking ring. The locking ring is fixed inside a locking control sleeve. A cam groove is formed in the locking ring. A pin is inserted in the cam groove and in a hole formed in the base body. The locking control sleeve moves the locking ring between the locking and unlocking positions.

The chuck with locking device has a ratchet mechanism comprising a toothed ring (5) with asymmetrical teeth (5a) fixed to an outer casing (2), a ratchet ring (9) arranged such that it can slide but not rotate with respect to a base body (1) and provided with tabs (11) or teeth (9a) providing ratchet interlocking elements, a release elastic element arranged under compression between the ratchet ring (9) and the toothed ring (5), a locking ring (7) arranged adjacent to the ratchet ring (9) outside the base body (1) and fixed inside a locking control sleeve (14), a cam groove (8) formed in the locking ring (7), and a pin (13) inserted in the cam groove (8) and in a hole (30) formed in the base body (1). The locking control sleeve (14) moves the locking ring (7) and the ratchet ring (5) between locking and unlocking positions.

A drilling chuck for operation on an impact drilling spindle, which can be subjected to tangential loading, with a chuck body, which is connected or connectable to the impact drilling spindle in which jaw guides are formed, which are arranged inclined to the chuck axis, in which clamping jaws are guided which can be adjusted by means of a threaded ring, with a clamping sleeve, which is coupled in a torque-transmitting manner to the threaded ring, and with a locking device, which is adjustable between a release configuration which enables a relative rotation of the threaded ring with respect to the chuck body, and a locking configuration which obstructs or prevents this relative rotation. The locking device is formed from a locking sleeve, which is essentially rotationally fixed but axially displaceable with respect to the chuck body, which locking sleeve comprises at least one locking member.

A self-locking drill chuck includes rotating sleeve provided with a convex leaf spring fixed on a rotating sleeve on both ends, its nut or the ring fixedly connected with the nut provided with a first groove and a second groove matching with the convex portion of the convex leaf spring, and the self-locking structure including a ring tooth on the drill body and a rotatable locking block disposed on the nut or ring fixedly connected to the nut. The nut or ring fixedly connected to the nut is also provided with a leaf spring, and the rotating sleeve is provided with a first part compressing the leaf spring and a second part compressing the locking block. The self-locking drill chuck can achieve positioning fit of metals, and self-locking and unlocking switching is realized by the lever without the interference phenomenon in the self-locking structure.

A chuck has a body (14). A plurality of first teeth (96) are rotationally fixed to the body. At least one second tooth (100) opposes the first teeth. The first teeth and the at least one second tooth are configured so that engagement of the first teeth and the at least one second tooth prevents relative rotation between a nut (16) and the body in an opening direction. A sleeve (18) defines a notch (90b) that engages a spring (29) so that in a relative rotational position between the sleeve and the nut, the notch receives the spring so that the notch resists relative rotational movement between the sleeve and the spring in the opening direction of the chuck.

A drill chuck having a chuck body, having a clamping sleeve with a conical basic shape that can rotate about the chuck axis of the chuck body, by the rotation of which clamping sleeve a plurality of clamping jaws can be moved relative to the clamping body. The clamping sleeve is made in two parts, having a conical, metallic outer sleeve, having a conical, inner sleeve made of plastic, wherein the outer sleeve has a cylindrical subsection on its inner circumference for radial centering of the outer sleeve on the inner sleeve. A clamping sleeve and a method for producing knurling on the clamping sleeve are also provided.

The present invention provide a self-locking drill chuck, its rotating sleeve is provided with a convex leaf spring fixed to a rotating sleeve at both ends, its nut or ring fixedly connected with the nut are provided with a first groove and a second groove matching with the convex portion of the leaf spring; the self-locking structure includes a ring tooth on the drill body and rotatable locking block arranged on the nut or ring fixedly connected to the nut, the nut or ring fixedly connected to the nut is provided with a leaf spring, the rotating sleeve is provided with a first part compressing the leaf spring and a second part compressing the locking block. This invention can achieve positioning matching between metals, which has a stronger holding force for maintaining self-locking state of the drill chuck, greatly enhancing the operating feel.