Power tool, in particular a hammer drill, including a housing, a tool fitting for receiving and holding a tool, an impact device for producing and transmitting impact pulses to the tool, and a rotation device for producing and transmitting a torque to the tool, wherein a working axis passing through the impact device is provided. The power tool includes a first drive unit having a first axis of rotation for driving the rotation device and a second drive unit having a second axis of rotation for driving the impact device, wherein the first and second drive units are arranged in such a way relative to one another in the housing that the first axis of rotation of the first drive unit is arranged at a first angle to the second axis of rotation of the second drive unit and at a second angle to the working axis.

A rotary hammer tool can include a housing, a first motor supported by the housing, a spindle rotated by the first motor, a second motor supported by the housing, and a reciprocation mechanism reciprocated by the second motor. The reciprocation mechanism can include a piston driven to reciprocate within the spindle and a striker to reciprocate within the spindle in response to reciprocation of the piston. The rotational speed of the spindle and a reciprocation frequency of the reciprocation mechanism may be independently controllable.

An improved technique relating to mounting of a battery in an impact tool which has a handle configured to move with respect to a tool body. A hammer drill has a body, a handle part and a battery mounting part. The handle part is configured to slide with respect to the body under a biasing force of a coil spring. The battery mounting part has a plurality of mounting parts. At least one of the mounting parts of the battery mounting part is connected to the handle part and slides together with the handle part with respect to the body during operation.

A power tool having a rotary hammer mechanism has a motor, a driving mechanism, a tool body that houses the motor and the driving mechanism, a handle having a grip part, and a first operation member. The driving mechanism is configured to operate by power of the motor in an action mode that is selected from a plurality of operation modes including a first mode of at least rotationally driving a tool accessory around a driving axis and a second mode of only linearly driving the tool accessory along the driving axis. The grip part extends in a direction crossing the driving axis and is configured to be held by a user. The first operation member is on the tool body and faces the grip part. The first operation member is configured to be manually operated by the user to change the action mode of the driving mechanism.

A hammer drill serving as an impact tool is provided with a crank housing that accommodates a crankshaft, and a cylinder accommodated in the crank housing. Receiving portions that receive the cylinder which is pressed rearward are provided at multiple locations of the crank housing in the front-rear direction. At least one of the receiving portions is disposed to receive the rear-end portion of the cylinder. A portion of the cylinder, which is received by another one of the receiving portions is a circlip (circumferential member) made of a metal.

The present disclosure relates to an electric tool, including a housing, a motor accommodated in the housing, a transmission mechanism, and an impact mechanism, where the impact mechanism includes an air cylinder, and an impact rod, a guide device, an impact hammer, and a piston arranged in the air cylinder; and when the impact rod moves along a direction opposite to an output direction, a second guide part sequentially supports a third section and a second section greater than the third section in diameter.

A reciprocating tool includes a motor, a motion converting mechanism, a body housing, an inner housing, a support body, and a counterweight. The motion converting mechanism is operably coupled to a motor shaft and is configured to convert rotation into a linear reciprocating motion along a driving axis. The inner housing is within the body housing and houses at least a portion of the motion converting mechanism. The support body is originally separate from the inner housing and is attached to the inner housing in the body housing. The counterweight is operably coupled to the motion converting mechanism and is configured to be driven by the motion converting mechanism. The counterweight is supported by the support body to be pivotable around a pivot axis that extends in a direction orthogonal to the driving axis. At least a portion of the counterweight is housed in the inner housing.

An impact mechanism for an impact tool having a housing with a housing longitudinal axis, wherein the impact mechanism includes an impact mechanism longitudinal axis that is offset and substantially perpendicular to the housing longitudinal axis. The impact mechanism includes a gear carrier adapted to be driven by a motor of the impact tool to rotate about the impact mechanism longitudinal axis, a hammer slidably coupled to the gear carrier and rotatable about the impact mechanism longitudinal axis, the hammer includes a radial surface with a hammer lug extending therefrom, and an intermediate bit adapted to receive impact force from the hammer lug and transfer impact force to a tool bit.

The present disclosure relates to an electric tool, including a housing, a motor accommodated in the housing, a transmission mechanism, and an impact mechanism, where the impact mechanism includes an air cylinder, and an impact rod, a guide device, an impact hammer, and a piston arranged in the air cylinder; and when the impact rod moves along a direction opposite to an output direction, a second guide part sequentially supports a third section and a second section greater than the third section in diameter.

A portable power tool has a tool holder 2, a motor 8 and an electro-pneumatic striking mechanism 4. The striking mechanism includes an excitation piston 13, a striker 14, a pneumatic chamber 18 for coupling the striker 14 to the excitation piston 13 and an anvil 15 which is arranged in the striking direction 5 downstream of the striker 14 and is provided for transmitting a blow of the striker to the tool. The anvil is hollow. The hollow interior space 23 is closed in the striking direction 5 and counter to the striking direction 5.