Pulse generator and impulse machine for a cutting tool

1. Pulse generator ( 18 ) in an impulse generator ( 2 ) for a cutting tool ( 12 ), which pulse generator ( 18 ) is intended to transfer energy from a propulsion device ( 14 ) to impulses in the tool ( 12 ), characterized in, that the pulse generator ( 18 ) comprises a rotatable cylinder drum ( 28 ) comprising at least one piston cylinder ( 30 , 86 , 88 , 90 , 92 , 94 , 96 , 98 ), in which piston cylinder ( 30 , 86 , 88 , 90 , 92 , 94 , 96 , 94 ) is arranged at least one piston ( 32 , 87 , 89 , 91 , 93 , 95 , 97 , 99 ), which piston ( 32 , 87 , 89 , 91 , 93 , 95 , 97 , 99 ) is arranged to compress fluid ( 29 ) during rotation of the cylinder drum ( 28 ), and that the cylinder drum ( 28 ) is arranged to discharge the fluid ( 29 ) to the propulsion chamber ( 6 ) in the discharge position of the piston ( 32 , 87 , 89 , 91 , 93 , 95 , 97 , 99 ) via at least one opening ( 31 , 72 , 74 , 76 , 78 , 80 , 82 , 84 ) opening into the piston cylinder in order to produce an impulse in the tool ( 12 ).

2. Pulse generator ( 18 ) as claimed in claim 1 , characterized in, that at least one opening ( 41 , 43 , 45 , 42 ) in a valve disc ( 34 ), relative to which valve disc ( 34 ) the cylinder drum ( 28 ) is rotatably arranged, is arranged to bear against at least one opening ( 31 , 72 , 74 , 76 , 78 , 80 , 82 , 84 ) opening into the piston cylinder in the discharge position of the piston ( 32 , 87 , 89 , 91 , 93 , 95 , 97 , 99 ) and form a passage between the cylinder drum ( 28 ) and the propulsion chamber ( 6 ).

3. Pulse generator as claimed in claim 2 , characterized in, that a number of pistons ( 32 , 87 , 89 , 91 , 93 , 95 , 97 , 99 ) are arranged to discharge simultaneously.

4. Pulse generator as claimed in claim 2 , characterized in, that the pistons are arranged to discharge one at a time.

5. Pulse generator ( 18 ) as claimed in claim 1 , characterized in, that at least one opening ( 31 , 72 , 74 , 76 , 78 , 80 , 82 , 84 ) of the cylinder drum ( 28 ) opening into the piston cylinder is radially arranged, which opening is arranged to bear against a passage between the cylinder drum ( 28 ) and the propulsion chamber ( 6 ) in the discharge position of the piston ( 32 , 87 , 89 , 91 , 93 , 95 , 97 , 99 ).

6. Pulse generator as claimed in claim 5 , characterized in, that a number of pistons ( 32 , 87 , 89 , 91 , 93 , 95 , 97 , 99 ) are arranged to discharge simultaneously.

7. Pulse generator as claimed in claim 5 , characterized in, that the pistons are arranged to discharge one at a time.

8. Pulse generator as claimed in claim 1 , characterized in, that a number of pistons ( 32 , 87 , 89 , 91 , 93 , 95 , 97 , 99 ) are arranged to discharge simultaneously.

9. Pulse generator as claimed in claim 1 , characterized in, that the pistons are arranged to discharge one at a time.

10. Pulse generator as claimed in claim 1 , characterized in, that the pulse generator ( 18 ) further comprises an angled plane ( 38 ) against which at least one piston ( 32 , 87 , 89 , 91 , 93 , 95 , 97 , 99 ) is arranged to bear during rotation of the cylinder drum ( 28 ).

11. Pulse generator as claimed in claim 10 , characterized in, that the anged plane ( 38 ) is a tilted disc.

12. Pulse generator as claimed in claim 11 , characterized in, that the piston bears against the tilted disc ( 38 ) via a sliding support ( 40 ).

13. Pulse generator as claimed in claim 12 , characterized in, that the tilted disc ( 38 ) is arranged to be adjustable whereby the piston stroke of the piston ( 32 , 87 , 89 , 91 , 93 , 95 , 97 , 99 ) may be varied which changes the degree of compression in the piston cylinder ( 30 , 86 , 88 , 90 , 92 , 94 , 96 , 98 ) whereby the pulse energy may be controlled.

14. Pulse generator as claimed in claim 11 , characterized in, that the tilted disc ( 38 ) is arranged to be adjustable whereby the piston stroke of the piston ( 32 , 87 , 89 , 91 , 93 , 95 , 97 , 99 ) may be varied which changes the degree of compression in the piston cylinder ( 30 , 86 , 88 , 90 , 92 , 94 , 96 , 98 ) whereby the pulse energy may be controlled.

15. Pulse generator as claimed in claim 1 , characterized in, that the pulse generator ( 18 ) is hydraulically driven and that the low pressure side ( 25 ) of the pulse generator ( 18 ) is connected to the low pressure side ( 25 ) of the hydraulic propulsion device ( 14 ).

16. Pulse generator as claimed in claim 1 , characterized in, that the pulse generator ( 18 ) is electrically driven.

17. Pulse generator as claimed in claim 1 , characterized in, that the pulse frequency of the pulse generator ( 18 ) is determined by the rotational speed of the cylinder drum.

18. Pulse generator as claimed in claim 1 , characterized in, that the pulse generator ( 18 ) and the propulsion device ( 14 ) are arranged on the same shaft ( 42 ).

19. Pulse generator as claimed in claim 1 , characterized in, that in the fluid volume, a fluid from e.g. the group: water, silicone oil, hydraulic oil, mineral oil, and non-combustible hydraulic fluid, is received.

20. Impulse machine, characterized in, that it comprises a pulse generator ( 18 ) as claimed in claim 1 .