A pulse tool, in particular a pulse nutsetter, has at least one pneumatic drive unit with a drive rotor and a pulse unit driven by the drive unit, wherein a delay-dependent inertial cut-off device is assigned to the drive unit for the interruption of the air feed on acquiring a cut-off pules. A pulse tool of this nature is improved to the effect that it has or facilitates a compact design, a low weight and simultaneously, a fast cut-off by the inertial cut-off device. This is achieved by the inertial cut-off device having at least one cut-off piston for changing the air feed between the open and closed positions and which can be moved relative to the drive rotor and an, essentially annular, inertial body which can turn with the drive rotor. Due to the inertial body, on acquiring the cut-off pulse at least one drive body, essentially radially adjustable relative to the drive rotor, can be deflected due to an internal contour. The drive body is movably linked to a release device provided for the cut-off piston and which can be moved between a release position and a retaining position. The release device can be moved by the drive body into the release position for the release of the cut-off piston for movement into its closed position.
1. A pulse tool ( 1 ), in particular a pulse nutsetter, comprising: at least one pneumatic drive unit ( 2 ), having a drive rotor ( 3 ), and a pulse unit ( 4 ) driven by the drive unit, wherein the drive unit ( 2 ) is assigned a deceleration-dependent inertial cut-off device ( 5 ) for the interruption of an air feed on reaching a cut-off pulse wherein
the inertial cut-off device ( 5 ) has at least one cut-off piston ( 8 ), which is movable between an open and a closed position ( 7 ) relative to the drive rotor ( 3 ) for changing the air feed; and
a substantially annular inertial body ( 9 ) rotatable by the drive rotor ( 3 ) and upon reaching the cut-off pulse at least one drive body ( 11 ), is adjustable radially relative to the drive rotor ( 3 ) and is deflected by means of an internal contour ( 10 ) of the inertial body ( 9 ), said drive body being movably connected to a release device ( 13 ) movable between a release and a retaining position ( 12 ), for the cut-off piston ( 8 ), wherein the release device ( 13 ) is movable by the drive body ( 11 ) into the release position for the release of the cut-off piston ( 8 ) for movement into its closed position.
2. The pulse tool according to claim 1 , further comprising movably supporting the cut-off piston ( 8 ) on an essentially cylindrical rotor extension ( 14 ) of the drive rotor ( 3 ) opposite the pulse unit ( 4 ).
3. The pulse tool according to claim 2 , wherein the inertial body ( 9 ) extends around the rotor extension ( 14 ) and is supported for rotation at a free end ( 15 ) of the rotor extension.
4. The pulse tool according to claim 2 , wherein the rotor extension ( 14 ) comprises a carrier device ( 21 ) for the drive body ( 11 ) for its deflection radially outwards.
5. The pulse tool according to claim 4 , wherein the carrier device ( 21 ) comprises radial openings ( 22 ) in the rotor extension ( 14 ) and a bearing body ( 23 ) arranged in a longitudinal hole ( 24 ) of the rotor extension.
6. The pulse tool according to claim 5 , wherein the bearing body ( 23 ) is formed spherically or conically at least in the direction of the drive body ( 11 ).
7. The pulse tool according to claim 5 , wherein the bearing body ( 23 ) is part of the release device ( 13 ) and is supported for adjustment in the longitudinal direction ( 25 ) of the longitudinal hole ( 24 ).
8. The pulse tool according to claim 5 , where pressure is applied to the bearing body ( 23 ) in the direction of the drive body ( 11 ).
9. The pulse tool according to claim 5 , further comprising a cut-off sleeve ( 34 ) arranged at least partially within the retaining sleeve ( 29 ) and in contact with a contacting end ( 35 ) of the bearing body ( 23 ).
10. The pulse tool according to claim 9 , wherein the locking body ( 28 ) contacts an outer side of the cut-off sleeve ( 34 ).
11. The pulse tool according to claim 10 , further comprising a threaded stud ( 36 ) arranged within the cut-off sleeve ( 34 ), wherein pressure is applied to the first end ( 37 ) of the threaded stud facing the drive unit ( 2 ) in the direction of the bearing body ( 23 ).
12. The pulse tool according to claim 11 , wherein the pressure applied to the first end ( 37 ) is varied by adjusting the threaded stud ( 36 ) in the longitudinal hole ( 24 ).
13. The pulse tool according to claim 12 , wherein the threaded stud ( 36 ) is screwed to the cut-off sleeve ( 34 ) for adjustment relative to the cut-off sleeve.
14. The pulse tool according to claim 12 , further comprising a stud compression spring ( 39 ) with optionally a collar stud ( 40 ) arranged between it and the first end ( 37 ) of the threaded stud ( 36 ), wherein the spring applies pressure to the threaded stud.
15. The pulse tool according to 12 , wherein the bearing body ( 23 ) has an essentially central longitudinal opening ( 43 ) in alignment with an insertion recess ( 44 ) in the threaded stud ( 36 ).
16. The pulse tool according to claim 15 , further comprising a housing ( 45 ) of the pulse tool ( 1 ) comprising an insertion opening ( 46 ) for an adjusting tool, the adjusting tool configured to be inserted through the insertion opening and through the longitudinal opening into the insertion recess ( 44 ) for rotating the threaded stud ( 36 ).
17. The pulse tool according to claim 16 , where the insertion opening ( 46 ) comprises a sealing seat ( 48 ) on its inner side ( 47 ) for the sealing contact of an, in particular spherical, closing body ( 49 ).
18. The pulse tool according to claim 12 , further comprising a frictionally engaged rotational securing element ( 50 ) arranged between the threaded stud ( 36 ) and the cut-off sleeve ( 34 ).
19. The pulse tool according to claim 2 , wherein the rotor extension comprises at least one elongated hole ( 27 ), in which a locking body ( 28 ) is movably supported, with which the cut-off piston ( 8 ) from a first side and from a second side a retaining sleeve ( 29 ) movably supported in the longitudinal hole ( 24 ) are in contact.
20. The pulse tool according to claim 19 , wherein the cut-off piston ( 8 ) comprises an accommodating groove ( 31 ) for the locking body ( 28 ) on an inner side ( 3 ).
21. The pulse tool according to claim 20 , wherein pressure is applied to the retaining sleeve ( 29 ) within the longitudinal hole ( 24 ) in the direction of the locking body ( 28 ), in particular by a compression spring ( 33 ).
22. The pulse tool according to claim 21 , wherein a spring constant of the compression spring ( 33 ) is greater than a spring constant of the piston compression spring ( 36 ).
23. The pulse tool according to claim 19 , wherein the locking body ( 28 ) contacts a free end ( 32 ) of the retaining sleeve ( 29 ).
24. The pulse tool according to claim 2 , wherein the cut-off piston ( 8 ) comprises a closing flange ( 41 ) protruding radially outwards.
25. The pulse tool according to claim 1 , wherein the inertial body ( 9 ) comprises an essentially circular external circumference ( 16 ) and a polygonal internal circumference ( 17 ).
26. The pulse tool according to claim 25 , wherein the internal circumference ( 17 ) is essentially formed in the shape of an equilateral triangle.
27. The pulse tool according to claim 26 , wherein each side of the triangle is convex.
28. The pulse tool according to claim 26 , wherein the apices of the triangle ( 19 ) of the internal circumference ( 17 ) have convex inner sides.
29. The pulse tool according to claim 26 , further comprising assigning a drive body ( 11 ) to each apex of the triangle ( 19 ).
30. The pulse tool according to claim 25 , wherein the polygonal internal circumference ( 17 ) is asymmetrical relative to an axis of rotation ( 20 ) which is the rotor extension ( 14 ).
31. The pulse tool according to claim 1 , wherein the drive body ( 11 ) is a drive ball.
32. The pulse tool according to claim 1 , wherein pressure is applied to the cut-off piston ( 8 ) in the direction of the closed position, in particular by means of a piston compression spring ( 26 ).
33. The pulse tool according to claim 1 , wherein the inertial body ( 9 ) is floatingly supported.
34. The pulse tool according to claim 1 , wherein the drive bodies ( 11 ) are additionally secured at the side in the longitudinal direction ( 25 ) by limit stops ( 22 ), such as for example snap rings or similar components.