US1440388A - Work-holding mechanism - Google Patents

Description

mmmsfs M. L. JEFFRY. WoRK HoLmNe Mecmmsm. FILED Dsc.' 29. i919.

2' swears-SHEET l Jam 2 1923.

V/ W e i M. www@ Y@ i T Patented dan. 2, it

AELE

Application filed December 29, 1919.

' ventions.

rlhe present invention, relating, as indicated, to work-holding mechanism, is particularly directed to an improved means ior holding` andL lining in position such small articles as steering rod connections 'tor motor vehicles, in which holes have to be drilled through the ends or knuckles of the rods. In such cases it is essential that the holes be drilled exactly centrally in the ends, and jigs or templates are usually provided .tor this purpose. 'lhe present mechanism is adapted, however, to accomplish this same purpose accurately and conveniently, and is also constructed to permit the use ot a number of sets of work-engaging members or jaws to adapt the mechanism to various work and to allow it to hold diferent articles. To the accomplishment oi' the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawing and the following description set 'lorth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one ot various mechanical ttorms in which the principle ot the invention may be used.

ln said annexed drawings Fig. l is a plan view oimy improved mechanism; Fig. 2 is a longitudinal horirental section on the line ,Q -2, in Fig. 3; Fig. 3 is a central transverse vertical section; and Fig'. l is a section on the line #4, in Fig. 3.

rllhe mechanism includes a base member l which is adapted to be suitably attached to the base or work table of the machine on which the present mechanism is to be used, such for example as a drill press. lviounted in the upper portion 2 of the base is an actuating member 3 provided with a hand wheel a and having oppositely torined threaded portions 5 and t3. .Engaged with Serial No. 343,156.

these two threaded portions are work-engaging members or jaws 7 and 8, respectively, which are suitably mounted in guideways formed transversely of the base ment ber and are adapted to be actuated outwardly or away from eachother by the oper-v ation oi the actuating member 3 through the handv wheel l. 'lhe upper portion of the base 2 is provided with an extending llange 9, in which is set a drill guide 10, which is held in position against` movement or rotation by means ot a rod ll, and bolt l2. The two jaw members 7 and 8 are constructed, as shown in Fig. 2, to grip a member such as the end 13 of a steering knuckle connection for the steering mechanism of an automobile. Such an article must be drilled with a vertical hole through the end 13, and the jaws which are shown in the present iigures are designed to receive such an article andto grip the cylindrical end 13 thereoiE and hold the same securely during the drilling operation.

ihe entiremechanism is mounted below the movable drill ot a drill press in such a position that the drill when brought downward will pass through the opening lll in the guide l0. rlhe work-engaging members 7 and 8 and the actuating member 8 are so constructed and assembled that the workengaging jaws will grip the article 13 and clamp the same against movement in a posi tion which is directly below and aligned with the opening 1st in the guide lO. The article 123 which is to be drilled is thus brought into exact aligmnent with the de scending drill, since all parts ot 'the mechanism have been constructed to grip this member at a predetermined position, which is directly in line with the movei'nent of the drill. ln operation, assuming' that the jaws are initially spaced or opened, the articleto be drilled is inserted and the hand wheel turned to clamp the jaws against the article, this movement also automatically centering the article beneath the drill guide l0. 'E he threads on the actuating shaft are coarse and only a slight turning oi' the handwheel is needed to bring the jaws into action. rEhe drill is then lowered and operated and the jaws are next returned to release the article.

One very important advantage ot the present improvement is that it is adapted to receive various sized and shaped jaws to hold a number ot different articles, and that so long as tlie jaws are duplicates the actuation or" the shaft 3 serves to exactly center the work beneath the drill guide in position to be operated upon.

Other modes of applying the principle ot'V my invention -inay be employed instead oli the one explained, change being inade as regards tlie mechanism herein' disclosed,

provided tlie nieans stated by rany of the fol-y lowing claiins or the equivalent of such stated ineens be employed.

l therefore particularly pointout and distinctly claiin as niyinventioiil. ln adeviceot the character described7 a baseplate, a vertically. supported plate base plate, an aperture formed in said veX-` tension flange to provide a drill guide seat, an interchangeable drill `guide rotatably mounted in said seat, and a pair lof interlocking studs mounted upon said drill guide and flange respectivelyto permit of tlie rotation and unlocking of said 'drill guide.v

2. ln .adevice of .the character described, a base plate having a vertical .section ifieose it'oriiied integrally therewith, an extension llange formed integralv with saidv vertical portion and ovei'lianging the central portion ofthe base plate, a longitudinal key-way loriiied on one side ofsaidvertical section,

an extension lug' fornied onone side ol said lugs slidably ei'igaglng said leyway, reinov-v able jaws keyedin registering position to said. worlvengaging `nienibers, a single actuating ineinber engaging .each of saidwork engaging nieinbers and serving to simultaf iieously Inove Ltlieni toward or away'. roni each other, an yextension flange. integral with the verticallysupported plate Vand overhangingthe central portion of the base plate, an extension lug` integral with the vertically supaorting vplate and oX/erlianging the central portion of the base plate, .and drillreceiving apertures in said extension flange and proijecting lug respectively, in vertical aligninent upon opposite sides ot. saidlreyway.

Signed by ine, this 22 day of December,

MAX L. JEFFREY.

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