A power tool is provided and includes a housing, a motor, a gear case, a bearing assembly, and a chuck assembly. The motor is disposed in the housing and defines an axis of rotation. The gear case is coupled to the motor and includes a proximal end and a distal end. The proximal end of the gear case is coupled to the housing. The bearing assembly extends from the distal end of the gear case along the axis of rotation and supports a driveshaft for rotation about the axis of rotation. The chuck assembly is rotatably coupled to the driveshaft and includes a chuck sleeve annularly surrounding the bearing assembly about the axis of rotation.

A system for disassembling a drill assembly including a drill bit and one or more columns interlinked with each other. The system includes a first clamping mechanism adapted to engage one of the drill bit or a first column, and a second clamping mechanism adapted to engage a second column disposed successively to the drill bit or the first column. The second clamping mechanism is turned relative to the first clamping mechanism to at least partially delink the second column from the first column or the drill bit. The system further includes a first actuator adapted to move one of the first clamping mechanism or the second clamping mechanism relative to the other to define a gap therebetween to reveal an interface between the second column and the drill bit or the first column for delinking the second column relative to the drill bit or the first column.

A chuck for use with a power driver having a rotatable drive spindle is provided. The chuck may comprise a plurality of jaws, a front body, a nut, a rear body, and a clutch. The clutch may be configured to move between a working position and a jaw actuating position. In the working position, the clutch teeth may be engaged with the rear body teeth such that rotation of the rear body by the drive spindle rotates the clutch, the front body, and the jaws. In the jaw actuating position, the clutch teeth may not or need not be engaged with the rear body teeth and the rear body may be configured to rotate the nut relative to the front body to move the jaws relative to the front body.

A chuck for a power tool includes a body extending along a longitudinal axis, a central bore extending along the longitudinal axis and configured to receive a tool bit, a plurality of angled passageways defined in the body, and a plurality of jaws at least received in the passageways and moveable between an axially forward and radially inward clamping position to clamp a tool bit and an axially rearward and radially outward retracted position. At least one jaw has a rear end lying in a first plane transverse to the longitudinal axis. A first key drive member is coupled to a tail portion of the body and configured to be engaged by a second key drive member on an output shaft of a power tool to non-rotationally couple the body to the output shaft. The first key drive member extends axially from a rearward end to a forward end that lies in a second plane transverse to the longitudinal axis. The second plane is axially forward of the first plane when the jaws are in the retracted position.

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 (600) for use with a powered driver having a rotatable drive shaft is provided. The chuck may include a body, a plurality of movable jaws (610), a nut (625), a sleeve (640), and an anti-vibration assembly (620). The anti-vibration assembly may be operably disposed between the sleeve and the nut and configured to absorb vibration caused by operation of the power driver and maintain a position of the sleeve relative to the nut when the sleeve is in at least a locked position.

A cooling chuck relating to a technical field of mechanical manufacturing of drill chuck is provided, including a drill body, a clamping jaw, a nut, a sleeve and a back cover, wherein: a connection hole is provided at a back end of the drill body for connecting to a drive mechanism; a clamping jaw outlet is provided at a front end of the drill body; a clamping jaw cavity is arranged on the drill body outside the connection hole at the back end of the drill body; the clamping jaw is arranged in the clamping jaw cavity; a thread section is arranged at a back part of the clamping jaw; the thread section at the back part of the clamping jaw is engaged with the nut arranged at an outer side surface of the clamping jaw cavity; the nut is connected to the sleeve; the back cover is arranged at the back end of the drill body; a clamping jaw slope is arranged at a back end of the clamping jaw; the clamping jaw slope inclines downward clockwise or anticlockwise along a rotation direction of the drill body; air inlets are provided on the back cover; through rotation of the drill body, the clamping jaw slope at the back end of the clamping jaw generates wind under effect of rotary force, and the wind enters the drill body through the air inlets, so as to decrease a product temperature. The present invention has a simple structure, is convenient to use, and is able to decrease the product temperature and improve a product life.

The present invention provide a novel drill chuck comprising a rotary sleeve, a drill body, a nut and a clamping jaw, wherein the nut is connected with the clamping jaw via threaded connection, the rotary sleeve is directly connected with or connected with the nut through a connecting structure, the drill body is provided with an inclined clamping jaw hole for the clamping jaw to slide back and forth along the clamping jaw hole, a ring of steel balls are cushioned around the drill body at the back of the nut; wherein a deformable and recoverable energy storage support structure is disposed between the nut and the drill body, for pushing the nut forward and increasing the threading force of the nut and the clamping jaw and providing cushioning to prevent loosening. The present invention has a simple structure, no matter for a common keyless drill chuck or a self-locking drill chuck, the present invention can cope with adverse effects on the clamping of drill bit and maintaining locking state of drill chuck generated by various reasons, significantly improve the performance of the drill chuck and prevent the occurrence of loosening during the drilling work.

A hand-tight drill chuck with a lock and self-locking structure including an elastic piece with an arcuate portion, arranged on a ring member threadedly connected to a clamping claw. The two ends of the arcuate portion are restricted. The elastic piece has a locking portion and groove or protrusion that cooperate with teeth between two ends of the arcuate portion. The drill chuck has a rotation sleeve with control structure. The control structure includes a metal member with elastic portion having a protrusion or groove that cooperate with the groove or protrusion. When the groove or protrusion of the elastic piece withstands against and is engaged with the protrusion or groove of the metal member via elasticity, the drill chuck is in a self-locking state. This ensures a locking torque and unlocking torque by elastic match between an elastic force which is not slack.

The invention relates to a chuck having a sleeve, a chuck body, a plurality of chuck jaws, an adjusting mechanism configured to adjust relative movement between the chuck jaws and the chuck body, at least one locating member and a pushing mechanism. The locating member is disposed on the chuck body between the adjacent chuck jaws. When the adjusting mechanism drives the chuck jaws to approach to each other relative to the longitudinal axis, the pushing mechanism pushes the locating member to move towards the longitudinal axis. When the adjusting mechanism drives the chuck jaws to move away from each other relative to the longitudinal axis, the pushing mechanism pushes the locating member to move away from the longitudinal axis. Therefore, the operation is more convenient and safer; the aligning effect is precise and reliable, and the pre-tightening force is stable.