A power tool, comprising: a housing; a motor being disposed in the housing for outputting rotary power; an output shaft having an accommodating hole in the axial direction for holding a tool bit; a transmission mechanism, being disposed between the motor and the output shaft for transmitting rotary power from the motor to the output shaft; a tool bit supporting being disposed in the housing and including several chambers disposed in parallel for holding the tool bit; a connecting member being disposed in the housing and capable of moving axially between a working position where the connecting member passes through one of the chambers and to accommodate the tool bit in the chamber connect the output shaft, and a release position where the connecting member exits and separates from one of the several chambers; and an operating member is arranged on the housing for controlling the axial movement of the connecting member; the power tool further includes an automatic shifting means for adjusting the position of the tool bit supporting in response to the movement of the operating member, wherein the connecting member moves axially to a position that is separated from one of the several chambers, and the cartridge moves to a position where another chamber is axially corresponding to the output shaft under the action of the automatic shifting means.

A protection tool for an electronic drill provides various functions when drilling is carried out. The electronic drill has a front end with a through hole located at the front end and a drill head extending through out the through hole. The protection tool is moveably mounted at the front end of the electronic drill along an operation direction. A guard plate includes a pore aligning with the through hole and provides pass way for the drill head. A supporting frame is assembled with the guard plate and is moveably mounted at the front end of the electronic drill along the operation direction, so that the guard plate is positioned at a variable distance from the front end according to the movement of the supporting frame with respect to the front end.

A system and method for wirelessly communicating with a stored power tool is provided. In some embodiments, a comprises a power source interface configured to selectively electrically couple to a power source; a transceiver; an antenna; a electrically coupled to the power source, the transceiver, and the antenna, wherein the processor is configured to: establish a first communication link with an external device; receive an indication that communications with the power tool are to be carried out; and in response to the indication that communications with the power tool are to be carried out, establish a wireless second communication link with the power tool using the transceiver and antenna.

A motor-driven machine tool includes a drive unit and a tool changing magazine with tool chambers that are placed into a transfer position adjacent to a tool receptacle to be loaded. The machine tool includes a tool changing device with a slide element that is arranged in operative connection with a tool. The slide element is moved by an operating element into a first position for accepting a tool from or transferring a tool to the tool chamber and into a second position to drive the tool. The slide element is fixed in the second position by a blocking element that is brought out of operative connection with the slide element by a transfer element to move the slide element from the second position to the first position. The slide element is arranged in indirect contact with the blocking element to move the blocking element by the transfer element.

There is provided a bit holder assembly for a power tool. According to a first aspect, the assembly comprises an elongate member shaped to extend around and selectively couple to a portion of the power tool. The assembly comprises a bit holder, a male member connected to the elongate member and a female member connected to the bit holder. According to a second aspect, the elongate member has a pair of longitudinal edges and the assembly comprises a mounting member connectable with the bit holder and having a pair of flanges each of which receives a respective one of the longitudinal edges of the elongate member. According to a third aspect, the power tool has a slot for receiving a belt clip adjacent to a bottom portion thereof and the assembly comprises a bracket connectable with the bit holder and the slot of the power tool.

A hand-guided power tool has a power tool housing and an internal combustion engine arranged in the power tool housing and configured to drive a tool member of the power tool. A fuel tank and at least one electric component are provided. A control device that is an electronic control unit is connected to the at least one electric component of the power tool and controls the at least one electric component. The power tool has a top face which, when parking the power tool in a usual parking position on a flat horizontal support surface, is facing upwardly. The electronic control unit is positioned laterally adjacent to the fuel tank device, when viewing the power tool in the usual parking position.

An electronic drill with revolving replaceable drilling heads includes a housing, a driving unit, a rotary cover, and a plurality of drill heads. The housing has an opening, a through hole, a containing room connected therebetween. A motor container is disposed within the containing room to contain a motor of the driving unit. The rotary cover is assembled to the housing and is rotatable so that the plurality of drill heads coupled to the rotary cover is moveable freely in a rotary track between the motor container and the housing. One of the drill heads may be rotated to be aligned with a rotary hole of a gear set driven by the motor and pushed forward for use. The drill head can also be retracted backward and replaced in the electronic drill by rotating the rotary cover, so that another drill head can be pushed outward for use.

A screwdriving including a housing with a handle section and a motor housing section. A longitudinal axis of the handle section is at an offset angle with respect to a longitudinal axis of the motor housing section. A motor is housed in the motor housing section. An output tool holder is selectively driven by the motor. A user actuatable trigger activates the motor. The screwdriver further includes a bit holder rotatably held on the housing, the bit holder including a first section which includes a plurality of bit retainers; and a second section including a plurality of detents. The screwdriver further includes a pin which engages with the plurality of detents to hold the bit holder in one of a plurality of rotational positions.

A power tool includes a housing in which a motor is supported and an output shaft coupled to the motor that extends from the housing. A tool holder is secured to the end portion of the output shaft which is configured to releasably retain an accessory tool. The power tool includes an accessory change tool having a driver portion and a handle portion. The driver portion is used to install and remove the accessory change tool from the tool holder. The handle portion and the driver portion are configured to pivot into a folded position at which the handle portion is located adjacent the driver portion. A retainer assembly is incorporated into the housing that is configured to releasably retain the accessory change tool on the housing with the accessory change tool in the folded configuration.

The present disclosure provides a portable power tool. The power tool includes a tool body, a tool assembly and a gas pressure detection assembly. The tool assembly is furnished detachably in an end of the tool body. The gas pressure detection assembly is furnished detachably in another end of the tool body. The gas pressure is electrical coupled to the tool body.