A hand tool device has a hammer mechanism including a hammer, at least one curve guide which drives the hammer at least during the hammer drilling operation, and at least one hammer mechanism spring which (i) stores at least a part of an impact energy in at least one operating state, and (ii) holds the hammer in the peripheral direction in at least one operating state.

A rotary power tool assembly including a hammercase an axis extending between a forward end and a rearward end, a drive mechanism housed within the hammercase, and a hammer driven by the drive mechanism to apply a rotational impact force on an anvil. The anvil includes an output shaft rotatable about the axis, a plurality of anvil jaws extending from the axis, and a flange fixedly connected to an end of the output shaft and extending radially from the axis, wherein the flange supports the plurality of anvil jaws, the flange extending over the plurality of anvil jaws. The anvil includes a magnet attached to the flange opposite to the plurality of anvil jaws. An anvil angle sensor is configured to read and interpret magnetic flux changes of the magnet and determine the position of the anvil rotating about the axis.

A hammer mechanism has a clamping chuck and a snap die provided for the direct striking of an inserted tool. The snap die includes a coupling element for transmitting a rotary motion to the clamping chuck.

A hammer mechanism having at least one impact-generation unit and a clamping chuck drive shaft is provided. The impact-generation unit includes a spur-gear transmission stage for translating a rotational speed of the clamping chuck drive shaft into a higher rotational speed for impact generation.

An anvil for an impact mechanism, where the anvil includes wings that taper at a taper angle of about 5 degrees to about 30 degrees. The anvil may also include a shaft extending from the wings, and a drive end adapted to transfer and apply torque to a work piece. The wings of the anvil also include wing impact surfaces that receive rotational impact forces from a hammer. For example, the hammer contacts and applies torque to the wings of the anvil.

The striking pin (16) is arranged in a bearing (29). The striking pin (16) has a circumferential surface (25) and a stop surface (27) facing in the striking direction (11). The bearing (29) has a sleeve (30) arranged coaxially to the working axis (10) as well as a catcher (32). The circumferential surface (25) of the striking pin (16) is installed so as to slide on the inside of the sleeve (30). The catcher (32) is arranged in the striking direction (11) of the stop surface (27) of the striking pin (16) in order to limit the movement of the striking pin (16) in the striking direction (11). A connecting link (35) is provided for purposes of causing the striking pin (16) to execute a rotation relative to the bearing (29) when the striking pin (16) moves in the striking direction (11). The connecting link (35) has a flank (42; 53) on the striking pin (16) and another flank (49; 52) on the bearing (29), whereby the two flanks (42; 53, 49; 52) that rest against each other during the movement rise in the striking direction (11) in the same circumferential direction (39).

An anvil for use with a power tool may include a shank and ram lug. The stank may have a first end and a second end. The ram lug may extend radially from the second end of the shank. The am lug may include an impact surface configured to receive an impact force from a hammer of the power tool and an impact layer comprising the impact surface. The impact layer may have been formed via a treatment process to have an impact layer depth to an impact layer transitional material interface with an interior region of the ram lug. The impact layer may have a first hardness and the interior region of the ram lug may have a second hardness. The first hardness may be greater than the second hardness.

An impact wrench is provided with a battery to power the motor. The impact wrench provides improved portability since the impact wrench does not need to be connected to an electrical extension cord or a pneumatic hose. The output drive, motor, batteries and main handle may be aligned along the axial direction of the tool. The batteries may be located between the motor and the main handle.

A rotary power tool assembly including a hammercase an axis extending between a forward end and a rearward end, a drive mechanism housed within the hammercase, and a hammer driven by the drive mechanism to apply a rotational impact force on an anvil. The anvil includes an output shaft rotatable about the axis, a plurality of anvil jaws extending from the axis, and a flange fixedly connected to an end of the output shaft and extending radially from the axis, wherein the flange supports the plurality of anvil jaws, the flange extending over the plurality of anvil jaws. The anvil includes a magnet attached to the flange opposite to the plurality of anvil jaws. An anvil angle sensor is configured to read and interpret magnetic flux changes of the magnet and determine the position of the anvil rotating about the axis.