Chucks or sockets – Socket type – Obliquely guided reciprocating jaws
Patent
1990-06-12
1993-03-23
Bishop, Steven C.
Chucks or sockets
Socket type
Obliquely guided reciprocating jaws
279902, B23B 3116
Patent
active
051957604
ABSTRACT:
A keyless chuck (10; 301) comprises a jaw housing (28; 303) with jaws (32; 333, 335, 337 ) which are slidably mounted in guideways (40; 319, 321, 323) between a rearward opened position and a forward closed position. A jaw thrust member (34; 345) is coupled to the jaws and is slidably mounted in the jaw housing to apply a thrust force to the jaws and to maintain the jaws in the same relative axial location. A nut (42; 355) is fixed to the jaw housing and has a threaded opening (46; 357) coaxial with the chuck axis (A.sub.x). A threaded spindle (48; 305) is engaged in the nut opening and is movable forwardly to apply clamping force to the jaws and rearwardly to remove clamping force. The spindle preferably engages the jaw thrust member through a small area contact patch (72; 401) to limit operating friction. The jaws either may be opened and closed responsive to rearward and forward movement of the spindle respectively or to simplify loading of a bit in the chuck, may be spring biased forwardly to a closed position (self-centering) and thus not movable responsive to movement of the spindle. A lock mechanism (22, 104, 42; 309) is preferably provided to limit relative rotation between the nut and spindle to prevent the application of excessive clamping force and to limit removal of clamping force. The lock mechanism also preferably permits incremental self-tightening when in the locked position through an automatic tightener (397) and through the sizing and spacing of two sets of teeth (373, 375) to limit the application and removal of clamping force on a drill bit. To limit the run out in a finished chuck, deformable (during assembly) interfaces (204; 401) are preferably provided between the jaw housing and nut and between the spindle and jaw thrust member (stop). To further enhance the accuracy of assembly and to reduce run out, the spindle and nut preferably have a smoothed walled interface (415, 417) to accurately control coaxial alignment of the nut and spindle.
REFERENCES:
patent: 914255 (1909-03-01), Farnham
patent: 1159248 (1915-11-01), Morrow
patent: 2406444 (1946-08-01), Stoner
patent: 2553990 (1951-05-01), Vidal
patent: 2683041 (1954-07-01), Haviland
patent: 2716555 (1955-08-01), Rowe
patent: 3350108 (1967-10-01), Troka
patent: 3506277 (1970-04-01), Harms
patent: 3545776 (1970-12-01), Haviland
patent: 3599999 (1971-08-01), Schnizler
patent: 3712633 (1973-01-01), Schadlich
patent: 3737170 (1973-06-01), Wanner et al.
patent: 4103914 (1978-08-01), Rohm
patent: 4213623 (1980-07-01), Rohm
patent: 4266789 (1981-05-01), Wahl
patent: 4305597 (1981-12-01), McCarthy
patent: 4317578 (1982-03-01), Welch
patent: 4463960 (1984-08-01), Walton
patent: 4491445 (1985-01-01), Hunger
patent: 4498682 (1985-02-01), Glore
patent: 4526497 (1985-07-01), Hatfield
patent: 4527809 (1985-07-01), Umbert
patent: 4536113 (1985-08-01), Hatfield
patent: 4592560 (1990-06-01), Neumaier
patent: 4609199 (1986-09-01), Rohm
patent: 4648608 (1987-03-01), Smith
patent: 4682918 (1987-07-01), Palm
patent: 4695065 (1987-09-01), Komatsu
patent: 4840387 (1989-06-01), McCarthy
patent: 4848779 (1989-07-01), Wheeler et al.
National/Panasonic pamphlet Re: Keyless Drill Chuck; Model No. EZ991.
Coleman Charles W.
Wheeler Dale K.
Bishop Steven C.
Black & Decker Inc.
Dearing Dennis A.
Del Ponti John D.
Yocum Charles E.
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