A chuck is composed of a body (2), gripping jaws (10) provided on the body (2), and feed structures (20) disposed in containing chambers (4) of the body (2), and the feed structure (20) is composed of a cylindrical body (21) having a male screw portion (22) formed thereon, a first receiving body (27) fitted in one end side of the cylindrical body (21), a second receiving body (35) fitted in the other end side of the cylindrical body (21), an eccentric shaft (40) consisting of an base shaft portion (41) and an eccentric portion (42), an external gear (45) having a through hole (46) formed to extend from front to rear through an central portion thereof and having the eccentric portion (42) of the eccentric shaft (40) inserted in the through hole (46), an internal gear (50) having a teeth portion partially meshing with a part of a teeth portion of the external gear (45), a screw body (55) composed of a screw member (56) and a flange member (60), and a coupling body (65) disposed between the first receiving body (27) and the external gear (45).
Feed structure and gripping device including same
2017-06-13
Patent
Electronic Resource
English