US 11,786,977 B2
Tool holder having anti-vibration arrangement with two masses and cutting tool provided with tool holder
Daniel Hen, Nahariya (IL); Rafi Rabouh, Neve Ziv (IL); and Jony Saffouri, Nazareth Eilit (IL)
Assigned to Iscar, Ltd., Tefen (IL)
Filed by ISCAR, LTD., Tefen (IL)
Filed on Sep. 7, 2021, as Appl. No. 17/467,877.
Prior Publication US 2023/0070392 A1, Mar. 9, 2023
Int. Cl. B23B 47/00 (2006.01); B23B 29/12 (2006.01); F16F 7/104 (2006.01)
CPC B23B 29/125 (2013.01) [F16F 7/104 (2013.01); B23B 2250/16 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A tool holder (22) elongated along a holder longitudinal axis (B) thereof, which defines opposite forward and rearward directions (DF, DR), the tool holder (22) configured to be secured at a rear end thereof, the tool holder (22) comprising:
a mass housing portion (40) comprising an interior holder cavity (36) having an inwardly facing cavity wall surface (38): and
an anti-vibration arrangement (34) comprising:
two vibration absorbing masses (54a, 54b) including a long vibration absorbing mass (54a) having a long mass central axis (E1), and a short vibration absorbing mass (54b) having a short mass central axis (E2), each of the long and short vibration absorbing masses (54a, 54b) having axially opposite forward and rear mass ends (60a, 60b); and
at least three resilient suspension members (62); wherein:
the long vibration absorbing mass (54a) extends along the long mass central axis (E1) for a long mass axial length (LL) and comprises a long mass material;
the short vibration absorbing mass (54b) extends along the short mass central axis (E2) for a short mass axial length (LS) and comprises a short mass material;
the short mass axial length (LS) is less than the long mass axial length (LL) and the long and short vibration absorbing masses (54a, 54b) are made of different materials; and
the tool holder (22) is adjustable between an unassembled state and an assembled state, and in the assembled state:
the two vibration absorbing masses (54a, 54b) are disposed in the interior holder cavity (36) and are elastically suspended therein by the at least three suspension members (62) contacting the inwardly facing cavity wall surface (38).