A hammer drill comprises a motor including an output shaft, a shaft assembly rotationally engaged therewith, a hollow spindle, and a hammer mechanism comprising a piston arranged for reciprocating motion within the spindle. The shaft assembly comprises a first part carrying a first gear engaged with a gear on the spindle to cause spindle rotation, a second part carrying a crank member to cause piston reciprocation, and a connecting part configured to rotationally interconnect, or disconnect, the first and second parts. In a first position of the connecting part only one of the first and second parts is rotationally engaged with the output shaft to enable rotation of only one of the first gear and the crank member respectively, while in a second position both the first and second parts are rotationally engaged with the output shaft to enable rotation of both the first gear and the crank member.

An impact tool is provided which has a driving mechanism, that drives a tool bit, a motor that drives the driving mechanism, an inner housing that houses the driving mechanism, an outer housing that has an internal space for housing the inner housing and the motor, an opening that leads from the outside to the internal space of the outer housing, and a covering member that covers the opening.

An impact tool includes a tool body, a tool holder, a cylindrical member, a reciprocating member, a motor, a first rotary body, a second rotary body, a swinging member, and clutch mechanisms. The clutch mechanisms are disposed between the first rotary body and the second rotary body on a power transmission path from the motor to the swinging member. The tool holder and the cylindrical member move together as a movable unit with respect to the tool body between a front end position and a separate position, according to a pressing force applied to the tool holder. The clutch mechanisms are each configured to start transmission of the first rotary body to the second rotary body while the movable unit moves from the front end position to the separate position and to interrupt transmission while the movable unit moves from the separate position to the front end position.

A tool holder for a rotating and chiseling portable power tool is disclosed. A hollow spindle surrounds, coaxially with a working axis, a receiving space for receiving a tool. The hollow spindle has at least one cutout in the radial direction. An insert is inserted into the cutout in the radial direction. The insert has a rib that protrudes into the receiving space in the radial direction. A channel is arranged within the cutout and extends along the working axis. The channel is open into the receiving space and is bounded by the insert and an inner face of the cutout.

An air or impact hammer tool bit operatively coupled to a driver is described, whereby the axial force provided by the air or impact hammer is translated to an applied torque through a dedicated driver, such as a socket adapter or wrench. The air or impact hammer bit may include or define a receiving, or female, geometry to removably couple the dedicated driver. The bit may include additional anti-rotation geometry adapted to restrict the rotation of the bit while engaged with the air or impact hammer and retention geometry preventing the dedicated driver from disengaging from the bit.

The disclosure discloses a straight-handle valveless pressurized pneumatic spade, including a handle, a coupling tube, a cylinder, a hammer, a front member, a spade head, and the like. The handle is mainly arranged to be composed of a switch sleeve mounted to an upper portion of the coupling tube and a handle body mounted to an upper portion of the switch sleeve. The switch sleeve, the handle body, the coupling tube, the cylinder, and the front member are all arranged on a same shaft axis to form a straight handle, and then an air intake switch in the handle body is configured to enable and disable communication between an air intake connector on the handle body and a connecting cavity in the switch sleeve. Apparently, such a straight handle has a simpler appearance, so as to facilitate assembling of the air intake switch, and a mounting structure is also more compact, thereby avoiding a risk of air leakage. In addition, the simple appearance reduces a packaging volume and facilitates transportation and storage. Moreover, through a plurality of slots provided on the outer circumferential surface, the upper end of the spade head is engaged with and operated by axially reciprocally moving up and down within the front member, which causes the spade head having such slots to be applicable to electric hammers, greatly expanding a range of application of the spade head.

An attachment includes a body, an impact portion defining an impact axis and configured to receive repeated impacts from the powered hammer, and a driving portion including a side load driving portion and a top load driving portion that alternately receive the rod to transmit driving forces from the repeated impacts to the rod. The side load driving portion defines a side load driving axis that is offset from the impact axis. The top load driving portion includes a blind bore and defines a top load driving axis that is coaxial with the impact axis. The top load driving portion includes a sleeve disposed within the blind bore and configured to decrease wear of the blind bore during use.

A tool, such as a hammer including a handle configured to be replaceable is shown. In one embodiment, the handle includes a grip insert coupled to the shaft of the hammer and an outer grip surrounding the grip insert. In another embodiment, the hammer includes a shaft with a pair of opposing channels. The handle includes a grip insert with a pair of corresponding projections to couple to the pair of opposing channels and an outer grip surrounding the grip insert.

An attachment includes a drive shank that is removably couplable to a tool, the drive shank having a groove in which the retention feature is disposed. An insert is coupled to the drive shank, and the insert is positioned in the groove of the drive shank and configured to engage a retention feature of the attachment.