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 system for a hydraulic hammer is disclosed. The impact system may include a piston, a sleeve disposed co-axial with the piston, and an accumulator membrane disposed external to the sleeve. A first seal may be located at an end of the sleeve, and configured to connect the sleeve to the piston. The accumulator membrane may have an extension configured to engage a recess in the sleeve.

An electric hand-held power tool, in particular a hammer drill and/or chipping hammer, having an electropneumatic impact mechanism which has a transmission housing, a guide tube arranged at least partially in the transmission housing, an exciter piston that is movable in an 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 via an end plate of the transmission housing on the other side, wherein the transmission housing is subdivided at least into a main shell and a cover shell separate from the main shell, such that the guide tube is braced against the main shell at least partially by the cover shell.