Hammer drill and/or paving breaker with a handle
View Patent ↗The invention relates to a handheld hammer drill and/or paving breaker which is at least of average weight and power class and which comprises an electric motor, a striking tool which can be actuated by the electric motor and a housing wherein the electric motor and the striking tool are received. A handle is embodied in such a way on the housing that a holding position is arranged in a projection of the striking axis of the striking tool. A rotating axis of a motor shaft of an electric motor is parallel to the axis of the striking axis, the total length of the hammer drill and/or striking hammer being small in the longitudinal direction.
1. A hammer drill and/or paving breaker ( 1 ), having:
an electric motor ( 23 ; 30 ),
a percussion mechanism ( 9 ) that can be driven by the electric motor ( 23 ; 30 ),
a housing ( 2 ) that accommodates the electric motor ( 23 ; 30 ) and the percussion mechanism ( 9 ), and having
a handle ( 8 ) that is fashioned on the housing ( 2 ) in such a way that a grasping position is situated at the level of a prolongation of a percussion axis ( 6 ) of the percussion mechanism ( 9 );
the axis of rotation ( 25 ) of a motor shaft ( 26 ) of the electric motor ( 23 ; 30 ) being axially parallel with the percussion axis ( 6 );
characterized in that
the electric motor ( 23 ; 30 ) is situated in an area of the housing ( 2 ) underneath the handle ( 8 ), relative to the percussion axis in a horizontal tool position.
2. The hammer drill and/or paving breaker ( 1 ) as recited in claim 1 ,
characterized in that
the electric motor is a three-phase motor ( 23 ), and that
a converter ( 27 ) is provided in the housing ( 2 ) in order to supply power to the three-phase motor ( 23 ).
3. The hammer drill and/or paving breaker ( 1 ) as recited in claim 2 , characterized in that further comprising ( 2 ) a wobble plate device ( 16 ) that converts a rotational movement of the three-phase motor ( 23 ) into a back-and-forth movement for the percussion mechanism ( 9 ).
4. The hammer drill and/or paving breaker ( 1 ) as recited in claim 3 ,
characterized in that the converter ( 27 ) has a U-shaped construction, and is situated above the percussion mechanism ( 9 ), as well as above the wobble plate device ( 16 ), relative to the percussion axis in the horizontal tool position.
5. The hammer drill and/or paving breaker ( 1 ) as recited in claim 1 ,
characterized in that the electric motor is a universal motor ( 39 ).
6. A hammer drill and/or paving breaker ( 1 ), having:
an electric motor ( 23 ; 30 ),
a percussion mechanism ( 9 ) that can be driven by the electric motor ( 23 ; 30 ),
a housing ( 2 ) that accommodates the electric motor ( 23 ; 30 ) and the percussion mechanism ( 9 ), and
a handle ( 8 ) that is fashioned on the housing ( 2 ) in such a way that a grasping position is situated at the level of a prolongation of a percussion axis ( 6 ) of the percussion mechanism ( 9 ); the axis of rotation ( 25 ) of a motor shaft ( 26 ) of the electric motor ( 23 ; 30 ) being axially parallel with the percussion axis ( 6 );
characterized in that
the electric motor is a three-phase motor ( 23 ),
a converter ( 27 ) is provided in the housing ( 2 ) in order to supply power to the three-phase motor ( 23 ), and wherein that
relative to the percussion axis horizontal tool position, a three-phase motor ( 23 ) is situated above the wobble plate device ( 16 ) to behind the percussion mechanism ( 9 ), and, between the percussion mechanism ( 9 ) and the handle ( 8 ).