초록 ▼

A rotary hammer comprises an electric motor having its longitudinal axis perpendicular to the axis of the hammer spindle and the tool holder. A single switching element activates and deactivates the hammer mechanism and the rotary drive for the tool holder. The switching element has an eccentric act

A rotary hammer comprises an electric motor having its longitudinal axis perpendicular to the axis of the hammer spindle and the tool holder. A single switching element activates and deactivates the hammer mechanism and the rotary drive for the tool holder. The switching element has an eccentric actuating section extending parallel to the main axis of the switching element, acting on a coupling part to activate and deactivate the hammer drive. The switching element has a cam section acting on a slider part to engage and disengage a coupling sleeve (non-rotatable on the hammer spindle) with a drive sleeve to thereby engage and disengage the rotary drive of the hammer spindle.

대표청구항 ▼

[ What is claimed is:] [1.] A rotary hammer comprising:a hammer housing having front and rear ends;a hammer spindle rotatably mounted in the housing for rotation about an axis;a drive sleeve rotatably mounted on the hammer spindle;a coupling sleeve is non-rotatable but axially displaceably mounted o

[ What is claimed is:] [1.] A rotary hammer comprising:a hammer housing having front and rear ends;a hammer spindle rotatably mounted in the housing for rotation about an axis;a drive sleeve rotatably mounted on the hammer spindle;a coupling sleeve is non-rotatable but axially displaceably mounted on the hammer spindle to rotate therwith and couplable to the drive sleeve;a motor having an armature shaft extending perpendicular to the hammer spindle axis;a tool holder for receiving a bit, the holder located at the front end of the hammer housing and rotatably drivable by the motor about the hammer spindle axis;a hammer mechanism in the hammer housing for generating impacts acting on a rear end of the bit and having a drive shaft;the armature shaft being selectively coupled with the hammer mechanism drive shaft for generating impacts and being selectively coupled with the coupling sleeve via the drive sleeve for driving the hammer spindle;a switching element rotatable about a main axis and having a cam section for switching between at least a first pure drilling mode, a second hammer drilling mode and a third chiseling mode;a slider part movable parallel to the axis of the hammer spindle;the cam section acting on the coupling sleeve via the slider part to move the coupling sleeve between a position engaged with the drive sleeve and a release position separated from the drive sleeve;a coupling part coaxially movable relative to the drive shaft between a first and second position engaging and disengaging, respectively, a drive connection between the armature shaft and the drive shaft; andan actuating section connected to the switching element eccentrically relative to the main axis for moving the coupling part between the first and second positions.