A percussion tool comprises a housing and an electric motor positioned within the housing. The percussion tool further comprises a battery pack supported by the housing for providing power to the motor. The battery pack includes a plurality of battery cells having a nominal voltage of up to 120 Volts. The percussion tool further comprises a percussion mechanism driven by the motor and including a striker supported for reciprocation in the housing. The percussion tool has a ratio of impact energy to mass that is greater than or equal to 2.5 Joules/kilogram.

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.

An impact tool and a hammer. The impact tool includes a housing, a motor supported within the housing, an anvil extending from the housing, and a drive assembly configured to convert a continuous rotational input from the motor to intermittent applications of torque to the anvil. The drive assembly includes a camshaft driven by the motor and a hammer configured to reciprocate along the camshaft. The hammer includes a core coupled to the camshaft and a sleeve coupled to the core.

An impact tool and a hammer. The impact tool includes a housing, a motor supported within the housing, an anvil extending from the housing, and a drive assembly configured to convert a continuous rotational input from the motor to intermittent applications of torque to the anvil. The drive assembly includes a camshaft driven by the motor and a hammer configured to reciprocate along the camshaft. The hammer includes a core coupled to the camshaft and a sleeve coupled to the core.

A rotary impact tool includes a housing, an electric motor supported in the housing, and an impact mechanism for converting a continuous torque input from the motor to consecutive rotational impacts upon a workpiece. The impact mechanism includes an anvil and a hammer that is both rotationally and axially movable relative to the anvil for imparting the consecutive rotational impacts upon the anvil. The hammer is configured to rotate about an axis in a rotational direction when imparting the consecutive rotational impacts upon the anvil. The impact mechanism also includes a spring for biasing the hammer in an axial direction toward the anvil, and a means for biasing the anvil in the rotational direction about the axis.

A rotary impact tool includes a housing, an electric motor supported in the housing, and an impact mechanism for converting a continuous torque input from the motor to consecutive rotational impacts upon a workpiece. The impact mechanism includes an anvil and a hammer that is both rotationally and axially movable relative to the anvil for imparting the consecutive rotational impacts upon the anvil. The hammer is configured to rotate about an axis in a rotational direction when imparting the consecutive rotational impacts upon the anvil. The impact mechanism also includes a spring for biasing the hammer in an axial direction toward the anvil, and a means for biasing the anvil in the rotational direction about the axis.

An impact tool (1) includes: a motor (10); an impact mechanism (115), which is rotatable about an output rotational axis (BX) and is operably driven by the motor; an anvil (16) having an anvil shaft (113) disposed forward of the impact mechanism, and a radially-outward-protruding anvil projection (114) that is impacted in a rotational direction by the impact mechanism; a hammer case (6) housing the impact mechanism; an anvil bearing (115) held by the hammer case and surrounding the anvil shaft; a first groove (121) formed on an outer-circumferential surface of the anvil shaft so as to encircle the output rotational axis; a second groove (122) formed on an inner-circumferential surface of the anvil bearing so as to encircle the output rotational axis; and a restraining member (123) having a first portion (124) disposed in the first groove, and a second portion (125) disposed in the second groove.

An impact tool (1) includes: a motor (10); an impact mechanism (115), which is rotatable about an output rotational axis (BX) and is operably driven by the motor; an anvil (16) having an anvil shaft (113) disposed forward of the impact mechanism, and a radially-outward-protruding anvil projection (114) that is impacted in a rotational direction by the impact mechanism; a hammer case (6) housing the impact mechanism; an anvil bearing (115) held by the hammer case and surrounding the anvil shaft; a first groove (121) formed on an outer-circumferential surface of the anvil shaft so as to encircle the output rotational axis; a second groove (122) formed on an inner-circumferential surface of the anvil bearing so as to encircle the output rotational axis; and a restraining member (123) having a first portion (124) disposed in the first groove, and a second portion (125) disposed in the second groove.

An electropneumatic impact mechanism for an electric hand-held power tool, in particular a hammer drill and/or chipping hammer, wherein the impact mechanism has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in the axial direction in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing on the other side, wherein the impact mechanism has a bearing body on which the eccentric wheel is mounted rotatably by means of a pair of plain bearings.

An electropneumatic impact mechanism for an electric hand-held power tool, in particular a hammer drill and/or chipping hammer, wherein the impact mechanism has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in the axial direction in the guide tube, a connecting rod coupled to the exciter piston, and an eccentric wheel which is coupled to the connecting rod on one side and is mounted so as to be rotatable with respect to the transmission housing on the other side, wherein the impact mechanism has a bearing body on which the eccentric wheel is mounted rotatably by means of a pair of plain bearings.