A hammer-cap fastener may include a fastener head. The fastener head may include one or more beveled edges along a lateral surface of the fastener head. The hammer-cap fastener may include a threaded body having a first end coupled to the fastener head. The hammer-cap fastener may include a ring circumscribing the first end of the threaded body such that the ring is positioned flush against the fastener head. The ring may include a first surface positioned flush against the fastener head and a second surface through which the threaded body extends, the first surface of the ring having a larger area than the second surface of the ring. The first surface and the second surface of the ring may be connected by a sloped lateral surface. The hammer-cap fastener may couple a hammer cap to a hammer head.

Tool fitting device for a power tool, in particular a chipping hammer, including a holding device for receiving and holding a tool shank, a tool cap, and a dust protection device for preventing the penetration of dust into the tool fitting device. The tool cap includes at least one receiving element and the dust protection device includes at least one protruding element corresponding to the receiving element, such that the tool cap and the dust protection device are able to be connected together in a form-fitting manner. Dust protection device for use in a tool fitting device.

An impact tool head assembling mechanism is provided, including: an engaging sleeve, disposed on a front end of an impact tool, including a tubular wall and at least one projection, the tubular wall defining an axial direction, the at least one projection being protrudingly and retractably disposed on an inner wall of the tubular wall; an impact tool head, including a rod body and a flange which includes an inclined surface facing toward the front end and an outermost peripheral edge, a contact position being defined as a position where the inclined surface contact with the at least one projection; wherein a reference plane is defined as passing through the outermost peripheral edge and perpendicular to the axial direction, and an included angle between a line from the contact position to the outermost peripheral edge and the reference plane is between 25 and 65 degrees.

A handheld power tool (1) is provided, including a tool holder (2) for receiving and locking a tool (3) on a working axis (4), and including a power tool housing (6). A striking mechanism (8) includes a striker (10) for applying impacts in the impact direction (9) and an anvil (11) for absorbing the impacts and for transmitting the impacts in the impact direction (9) onto the tool (3) accommodated in the tool holder (2). A collar (18) is fastened to the power tool housing (6) and to the anvil (11). When the anvil (11) abuts a rebound impact damper (13) in the impact direction (9), the elastic collar (18) applies a force acting in the impact direction (9) onto the anvil (11).

A hand-held electric power tool includes a housing, a connecting seat, and an elastic member. The connecting seat is configured to couple a battery pack to the hand-held electric power tool along a first straight line whereby the battery pack and the hand-held electric power tool are electrically connected via the connecting seat. The connecting seat is operative to move along the first straight line and along a second straight line perpendicular to the first straight line. The elastic member is configured to movably connect the connecting seat to the housing, and is configured to generate a force at least along a third straight line inclined from the first straight line enabling the connecting seat and the battery pack to contact each other.

A tool for use with a hammer driver having a pin-accepting socket for driving a ground rod into the ground includes a body having two opposite side faces and at least one ground rod-accepting passageway extending between the two side faces. The tool also includes a guide pin which is joined to so as to extend from one of the side faces of the body and an elongated socket portion having first and second opposite ends and having a hollow interior which opens out of a first end of the socket portion. In addition, the socket portion is secured to the other side face of the body by way of the second end so that the first end extends away from the other side face of the body, and the guide pin and the elongated socket portion are axially-aligned with one another.

A hammer drive mechanism for a hammer strike mechanism of a hammer drill is provided including: a drive shaft capable of being rotationally driven by a motor, a rod capable of reciprocatingly driving a piston, and a conversion mechanism that converts the rotary movement of the drive shaft into a reciprocating movement of the rod. The drive shaft comprises a first part connected to the conversion mechanism and a second part capable of being rotationally driven by a motor. The second part connects to the first part via at least one dampener such that rotary movement of the second part is transferred to the first part via the at least one dampener.

The present disclosure generally relates to quick change attachments for a pneumatic percussive tool. The attachments convert a pneumatic percussive tool, such as an air impact tool with proximal attachment means, which has a “pushing” force, into a pneumatic percussive tool having a “pulling” force. Once attached to the pneumatic percussive tool, the attachments also provide a quick change feature for allowing “pulling” tools to be simply and easily removed and replaced.

Systems and methods for management of material stresses present at transitions between facets of an anvil and the anvil shaft are described. In one aspect, an apparatus includes an impact tool anvil extending along an axis of extension and having a faceted drive end and a shaft body which is connected to the faceted drive end through a transition region that couples respective faces of the faceted drive end to the shaft body, the transition region including a sweeping radius surface having a first axial end and a second axial end, the first axial end connected to a respective face of the faceted drive end, the first axial end having a tangency with the respective face of the faceted drive end; and an angular transition having a slope that radially rises from the second axial end of the sweeping radius surface to the shaft body.

Provided is a work tool that can work suitably in cooperation with an attachment device connected to a main body of the work tool to enhance work efficiency. The work tool includes a main body 2, and a control circuit 71 configured to provide control over the main body 2. The main body 2 includes a motor 3, an end-bit mount portion 10 and an end bit 14 as a work part configured to be driven by the motor 3 to perform a work. A dust collector 100 is connectable to the main body 2 to assist the work. The control circuit 71 is configured to detect whether the dust collector 100 is connected to the main body 2 and change the control over the main body 2 based on whether the connection is established or not.