Electrical drive-in tool
A drive-in tool for driving in fastening elements includes a driving ram ( 13 ) displaceable in a guide ( 12 ) and driven by a drive flywheel ( 32 ), a drive unit ( 30 ) having an electric motor ( 31 ) for rotating the drive flywheel ( 32 ), a drive coupling ( 35 ) for connecting a coupling section ( 15 ) of the driving ram ( 13 ) with the at least one drive flywheel ( 32 ), and an acceleration device ( 40 ) for accelerating the driving ram ( 13 ), together with the coupling section ( 15 ) in a direction of the drive flywheel ( 32 ).
1. An electrical drive-in tool for driving in fastening elements, comprising:
a guide ( 12 );
a driving ram ( 13 ) displaceable in the guide ( 12 ) for driving in a fastening element;
at least one drive flywheel ( 32 ) for driving the driving ram ( 13 );
a drive unit ( 30 ) for driving the at least one drive flywheel ( 32 ) and including an electric motor ( 31 ) for rotating the at least one drive flywheel ( 32 );
a drive coupling ( 35 ) for connecting a coupling section ( 15 ) of the driving ram ( 13 ) with the at least one drive flywheel ( 32 ); and
an acceleration device ( 40 ), including an acceleration flywheel ( 142 ) having a maximal circumferential speed which is smaller than a maximal circumferential speed of the drive flywheel ( 32 ), for transmitting an energy from about 50 mJ to about 20 J to the driving ram for accelerating the driving ram ( 13 ), together with the coupling section ( 15 ) thereof, in a direction of the drive flywheel ( 32 ).
2. A drive-in tool according to claim 1 , wherein the acceleration device ( 40 ) transmits to the driving ram ( 13 ) a pulse from 50 g*m/s to 3 kg*m/s.
3. A drive-in tool according to claim 1 , wherein the acceleration flywheel ( 142 ) is supported on a separate support axle ( 143 ).
4. A drive-in tool according to claim 1 , wherein the acceleration flywheel ( 142 ) is supported on a same support axle ( 34 ) as the drive flywheel ( 32 ).
5. A drive-in tool according to claim 1 , wherein the acceleration flywheel ( 142 ) has a smaller outer diameter (D 2 ) than an outer diameter (D 1 ) of the drive flywheel ( 32 ).
6. A drive-in tool according to claim 1 , wherein the drive unit ( 30 ) drives both the at least one drive flywheel ( 32 ) and the acceleration flywheel ( 142 ).
7. An electrical drive-in tool for driving in fastening elements, comprising:
a guide ( 12 );
a driving ram ( 13 ) displaceable in the guide ( 12 ) for driving in a fastening element;
at least one drive flywheel ( 32 ) for driving the driving ram ( 13 ) in a drive-in direction;
a drive unit ( 30 ) for driving the at least one drive flywheel ( 32 ) and including an electric motor ( 31 ) for rotating the at least one drive flywheel ( 32 );
a drive coupling ( 35 ) for connecting a coupling section ( 15 ) of the driving ram ( 13 ) with the at least one drive flywheel ( 32 ); and
an acceleration device ( 40 ), including an acceleration flywheel ( 142 ) having a maximal circumferential speed which is smaller than a maximal circumferential speed of the drive flywheel ( 32 ), for transmitting an energy from about 50 mJ to about 20 J to the driving ram for accelerating the driving ram ( 13 ), together with the coupling section ( 15 ) thereof, in the drive-in direction.
8. A drive-in tool according to claim 7 , wherein the drive-in direction is in the direction of the drive flywheel ( 32 ).
9. A drive-in tool according to claim 7 , wherein the acceleration flywheel ( 142 ) is supported on a separate support axle ( 143 ).
10. A drive-in tool according to claim 7 , wherein the acceleration flywheel ( 142 ) is supported on a same support axle ( 34 ) as the drive flywheel ( 32 ).
11. A drive-in tool according to claim 7 , wherein the acceleration flywheel ( 142 ) has a smaller outer diameter (D 2 ) than an outer diameter (D 1 ) of the drive flywheel ( 32 ).