A power tool is disclosed. The power tool has a pneumatic percussion mechanism with a percussion element guided on a working axis and a percussion surface pointing in a percussion direction, an exciter piston driven by a motor, and a pneumatic chamber formed between the exciter piston and the percussion element. The percussion element has a first partial body forming the percussion surface, a second partial body, and a spring element. The first partial body is moveable along the working axis relative to the second partial body. The second partial body has an abutment surface pointing in the percussion direction. The first partial body has an impact surface opposite the abutment surface. The spring element drives the first partial body relative to the second partial body in the percussion direction into a starting position in which the abutment surface is separated from the impact surface by a gap.

The hand-held power tool has a tool socket, a motor and a pneumatic striking mechanism. The striking mechanism has an exciter driven by the motor along a working axis, a striker coupled to the exciter via an air cushion, and an intermediate striker arranged between the striker and the tool socket in the striking direction. The striking mechanism also has a guide in which the intermediate striker is guided. The guide has a first sliding surface that guides a first section of the intermediate striker, and a second sliding surface that is arranged offset relative to the first sliding surface in the striking direction and that guides a second section of the intermediate striker. A radial dimension of the first section of the intermediate striker is greater than a radial dimension of the second section of the intermediate striker.

The sealing device includes an inner sealing ring including an annular inner sealing portion provided with a sealing lip intended to cooperate in a sealed manner with the outer surface of a striking piston of a hydraulic percussion apparatus, and an outer sealing element mounted around the inner sealing portion and intended to bear in a sealed manner at the bottom of an annular housing arranged on a guide body of the hydraulic percussion apparatus. The inner sealing ring further includes an annular protective portion axially shifted relative to the inner sealing portion and internally delimited by at least one converging protective surface, annular and converging towards the sealing lip, and an annular groove opening into the inside the inner sealing ring, the annular groove being disposed between the sealing lip and the converging protective surface.

A shock absorbing protection structure for a handheld tool contains: a power tool, a shock absorption sleeve, and at least one stopper. The power tool includes a drive block which has a switch configured to turn on/off the drive block, the driving block also has a coupling tube which has a tool head fixed on the coupling tube away from the drive block, and the power tool includes a joining portion formed on the power tool. The shock absorption sleeve is fitted on the joining portion of the power tool, and between the shock absorption sleeve and the joining portion is defined an accommodation space. The at least one stopper is flexible and is defined between the shock absorption sleeve and the joining portion of the power tool, and the at least one stopper is located at the accommodation space so as to absorb vibration.

A pneumatic hammer extender arm assembly is provided comprising an elongated extender arm body defining a hammer engaging portion formed at a first end of the body, and a hammerhead engaging portion formed at a second end of the body. A hammerhead is detachably engageable to the hammerhead engaging portion to allow for quick change of the hammerhead without the need for any tools.

A pneumatic hammer extender arm assembly is provided comprising an elongated extender arm body defining a hammer engaging portion formed at a first end of the body, and a hammerhead engaging portion formed at a second end of the body. A hammerhead is detachably engageable to the hammerhead engaging portion to allow for quick change of the hammerhead without the need for any tools. The hammerhead may alternately implemented to engage and apply an impact force to a fastener that may be axially offset from the extender arm body.

A hammer drill comprising: a body; a motor mounted within the body; a transmission housing mounted within the body, a transmission mechanism mounted within the transmission housing which is capable of rotatably driving and/or repetitively striking a cutting tool held by the hammer drill in response to rotation of an output shaft of the motor; wherein the transmission housing comprises a pair of housing portions adapted to engage each other to support the component parts of the transmission mechanism within the transmission housing; wherein the first housing portion is made from metal and the second housing portion is made from a plastic material, each of the components of the transmission mechanism being supported jointly be the first and second housing portions.

It is an object of the invention to provide an impact tool having a rational mechanism in an idling state. According to the representative invention, in an idling state defined as a state in which a tool accessory 119 is not pressed against a workpiece and an impact bolt 145 transmits a striking force to the tool accessory 119, the tool accessory retainer 510 moves with respect to a tool accessory holder 117 by movement of the tool accessory 119 in the longitudinal direction, so that the striking force is cushioned.

A rotary hammer includes a motor, a spindle coupled to the motor for receiving torque from the motor, a piston at least partially received within the spindle for reciprocation therein, and an anvil received within the spindle for reciprocation in response to reciprocation of the piston. The anvil imparts axial impacts to a tool bit in response to reciprocation of the piston. The rotary hammer also includes a bit retention assembly for securing the tool bit to the spindle.