An impact tool attachment for an impact tool includes a chuck, a shaft and a screw. A first channel is axially positioned in a back face of the chuck. The first channel is right-handedly threaded. The shaft has a first end and a second end. The first end is complementary to the first channel. The second end is hexagonally shaped when viewed longitudinally. The screw is left-handedly threaded. A penetration is axially positioned in the first end of the shaft. The penetration is complementary to the screw. The shaft is threadedly couplable to the first channel and the screw is threadedly couplable to the penetration. The shaft is coupled to the chuck such that the second end is configured to couple the shaft to an impact driver.

The invention relates to a power drill, having a tool-clamping device that is fastened to a spindle shaft, having a torque clutch that includes an axially movable clutch plate on which an axial force is exerted by a plurality of compression springs that cooperate at least indirectly with an adjusting nut situated on a housing component. The compression springs are accommodated in first recesses embodied in the longitudinal direction of the housing component. A device for axially moving an axial bearing situated on the spindle shaft, is provided at the end of the spindle shaft oriented toward the tool-clamping device. According to the invention, on its side oriented toward the clutch plate, the device for axially moving the axial bearing has at least one actuating section that is situated in a second recess of the housing component and on the side oriented toward the clutch plate, cooperates with an adjusting element for the device.

Disclosed are a clutch device, a drill chuck, a power tool, and a bidirectional rotation method of the drill chuck. The clutch device comprises a return elastic member, a transmission assembly and a rotating portion, wherein the transmission assembly comprises at least two oppositely arranged engagement portions; the engagement between the two engagement portions enables a front body and a rear body to rotate synchronously; the rotation of the rotating portion in a first direction enables the return elastic member to be compressed, such that the two engagement portions are disconnected; and the rotation of the rotating portion in a second direction enables the compressed return elastic member to return to an initial position such that the two engagement portions are engaged. The drill chuck comprises a front body, a rear body, clamping jaws and the clutch device; and the power tool comprises a driving shaft and the drill chuck.

A gear self-tightening drill chuck, comprising a rear pressing cover or a retaining ring, a rear body, a main body, a front sleeve, clamping jaws, and driven bevel gears; the rear body is arranged inside the main body; one end of the rear body is provided with a driving bevel gear, the large end thereof being arranged next to the rear body; the driving bevel gear is arranged inside the main body, and is engaged with the driven bevel gears; a plurality of driven bevel gears are arranged uniformly with the axis of the driving bevel gear as the centre line; the driven bevel gears have an inner screw thread; one end of the clamping jaw has an outer screw thread for use together with the inner screw thread; the main body is provided with clamping jaw holes and bevel gear holes.

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 gear self-tightening drill chuck, comprising a rear pressing cover or a retaining ring, a rear body, a main body, a front sleeve, clamping jaws, and driven bevel gears; the rear body is arranged inside the main body; one end of the rear body is provided with a driving bevel gear, the large end thereof being arranged next to the rear body; the driving bevel gear is arranged inside the main body, and is engaged with the driven bevel gears; a plurality of driven bevel gears are arranged uniformly with the axis of the driving bevel gear as the centre line; the driven bevel gears have an inner screw thread; one end of the clamping jaw has an outer screw thread for use together with the inner screw thread; the main body is provided with clamping jaw holes and bevel gear holes.

Disclosed is an inside pipe cutter lock. The inside pipe cutter lock is intended for use as an attachment on a power drill. The inside pipe cutter lock locks a drill bit into position by grasping the edge of a chuck grip. This prevents the loss of an inside pipe cutter when cutting pipe from the inside out.

The present invention provides a new drill chuck that resolves the problem that the excessive clamping force of the existing drill chuck makes it inconvenient to open the drill chuck and easily damages the cutters. The new drill chuck comprises a front-body, an after-body, and clamping jaws, wherein a thread is provided on the clamping jaw, the after-body is provided with master gears, slave gears are provided between the clamping jaws and the after-body, the master gear fits with the slave gear, a thread is provided inside the slave gear, and the thread of the slave gear fits with the thread of the clamping jaw.

A tool system having a hand-held machine tool including a tool holder for receiving an insert tool; and a mounting interface configured for mounting thereon: an angle attachment that includes an angle locking section for locking on the mounting interface and an angle drive unit; and an eccentric attachment that includes an eccentric locking section for locking on the mounting interface and an eccentric drive unit.

A clamping device for clamping a fastener, includes a clamping jaw, a first biasing member for biasing the clamping jaw, a clamping body having a central axis, a driving assembly for driving the clamping jaw to clamp the fastener, and a second member which can be driven by the first member to move axially relative to the clamping body so as to push the clamping jaw to clamp the fastener. The clamping body is formed with a notch for receiving the clamping jaw and the driving assembly is supported on the clamping body and includes a first member which can rotate and move axially relative to the clamping body. The installation structures between the clamping body, the driving assembly and the clamping jaw may be designed to be more compact so that the clamping device has a smaller size.