US1196839A - Friction-driven chuck. - Google Patents

Description

J. M. BODENE. FRICTION DRIVEN CHUCK. APPLICATION man APR.'20, 191s.

Patented Sept. 5, 1916.

l @we W@ UNITED STATES PATENT oFFicE.

JOHN M. BODENE, 0F CHICAGO, ILLINOIS, ASSIGNOBTO CHICAGO "FLEXIBLE SHAFT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

FRICTION-DRIVEN CHUCK.

Specification of L etters Patent.

Application led April 20, 1916. Serial No. 92,366.

kpanying drawings, forming a part thereof.

This invention relates to a power-driven chuck designed for operating a screw driver,

socket, wrench or other tool having analogous conditions of use.

The invention consists in the features and elements described and shown in the drawings, as indicated by the claims.

In the drawings z-Figure 1 is a side elevation partly in section illustrating a. chuck embodying this invention. Fig. 2 is a trans-V verse section taken as indicatedv at line, 22, on Fig. 1.- Fig. is a transverse section taken as indicated atv line, 3 3, on Fig.

l. Fig. 4 is a detail section taken as indi-v cated at line, 4 4, on Fig. 3. Fig.. 5 is ,a partial. vertical section similar to the corresponding. sectional, portion of Fig. 1 and illustrating a modified construction. Fig. 6 is a detail vertical section showing another position of the parts illustrated in Fig. 5.

The chuck which is the Vsubject of this invention is designed to be mpower-driven from a. shaft whose terminal portion, is indicated at A. on Fig..1, and which may be Icontinuously rotated. The screw driver, B,

which is yoperated through the chuckv is shown in engagement with the head of a screw indicated in dotted lines at C. Briefly the chuck consists of two portions, namely,

a two-part shell,'D, which may be termed the driving member, and thetool holder, E,

whichis the ultimate driven member and is.

shown concentrically mounted in the shell, D.

The shell, D, has a slightly tapered recess, Dl, with whose conical wall a correspondingly tapered cone, F, frictionally engages. The' member, F, ,is not a rcomplete cone, but only a short frustum thereof, and its larger base is formed with a central stem, F1, which'telescopes into a central bore, E1, of the tool holder, E, andalso serves to posiv tion a compression spring, G, coiled about it and reacting between the clutch member, F, and the tool holder, E, for longitudinally separating them. 'The purpose of this separation is to normally hold out of engagement thel clutch teeth or pins, Fzand E2,

motion from the member, F, to the member, f

E. The initial frictional engagementbetween theconical 'surface of the member, F, and the tapered recess of the shell, D, is effected by a flat compression spring, I-I, re'- 4acting between the face of the member, F,"

Patented Sept. 5, 1916.

and an adjustable sleeve, D3, which is screwed into the lower end of the shell, D,

and locked in adjustment by a' lock nut, D4.' When the chuck is used on an ordinary drill press or other boring machine, the driving shaft', A, represents'the constantly rotating spindle of the machine arid carries with it the rigidly associated shell, D.- Such machines are provided with manual adjusting means, whereby the table which carries the work represented inthe present case by' the screw, C, is `either movable toward and from the end nof the spindle, A, or such spindle is movable toward and from the table, so that thetwo parts are relatively ad justable. It will be evident that so long as the work, that is, thescrew, C, remains out of engagement with the screw driver blade, C, or such other tool as is carried in the holder, E, thesaid holder will hang loosely in the revolving sleeve, D3, its shoulder Es, engaging' the shoulder, D5, of said sleeve, and its driving pin, E2, being lthus held outo engagement with the driving pin, F2, of

,thefriction clutch member, F. This relawithout stopping the `rotation of the spindle,

A, and the attached shell, D, of' the chuck. Thenl by moving the spindle, A., and the work, C, relatively still closer together and lightly bearing down upon his adjusting lever, or corresponding'element, he will causethe, spring, G, to becompressed, and will bring the pins, E2, into engagement with the pins, F2, thereby operatively connecting't'he holderyE, to the frusto-'conical member, F.

It will be understood that the torqu 'which willbe transmittedthrough the fricmember, F. Thus the operator need not eX- .ert more pressure on the spindle, A, than enough to insure that thetool, B, 1s kept engaged with the head of the screw at C. ,'Ifhe member, F, being frictionally engaged with the shell, D, will rotate therewithfthus serving to set the screw, C, but when the latter has been screwed home the resistance to its further rotation will cause a slippage between the member, F, and the shell, D, thus preventing injury to the screw; or to the screw driver blade, B.

The screw driver blade, B, is of course removable from the holder, E, being non-rotatively engaged Vthereby in any suitable manner and being held in. engaged position by means of a set screw shown at E4. For

setting square-headed or heXagon-headed screws a socket wrench may be substituted for the screw driver, B, but if it is desired to use the machine for drilling or tapping or other operations in which it is not desirableto have the holder, E, normally disengaged from the member, F, these parts may be locked in engagement by settlng the screw, J, which is carried in the sleeve, D3, into the groove, E5, in the holden-E, when the parts are positioned as shown in- Fig. l, thus preventing the descent of the holder, E, or in other words, retaining the driving pins, E2, in engagement with the driving pins, F2, and holding the spring, G, compressed. It will be evident that so long as the parts, E and F, are prevented from separating -in axial direction, the. holder E, will not be free torotate in the sleeve, D3, eX.- cept as it rotates with the part, F, and said part will only rotate with respect to the shell, -D, and its sleeve, D3, in case of slippage at the frictional y engaged surfaces of said parts.

Figs. 5 and 6- present a modification of the means4 for securing continuous en age-n` ment of the driving pins, E2 and F2, an this modification consists in a'detent pin or plug, K, carried on the free end of a flat spring. member, L, whose opposite end is secured. in a suitable recess formed in the sleeve, B30, which corresponds to the sleeve, B3, of Fig.

1'. Intermediate the pin, K, and-the screw,

L1, which secures the spring, L,'said spring is provided .with a bushing, L2, threaded to receive an adjusting screw, M, whose inner end impinges against the wall of the sleeve,` B30. As indicated at Fig.. 5, the screw, M, when set through the spring, L, forces the pin, K, out of engagement with the groove,

The additional advantage-.of this m'odiication, however, is that the adjusting screw,

M, may be changed from the position shown in Fig. 5 to that shown in Fig'. 6, regardless of therelative position of the roove, E5", so that if at the time of such a justment the holder, E, is in its lowest position with the groove, E5", out of registration with the pin, K, that pin will be snapped into the groove, E50, the first time the holder, E, is moved up to cause registration of the groove with the pin; as, for example, by bringing the tool carried in the holder, E, into engagement with the .work upon which it is to operate. The pin, K, having once engaged the groove, E50, it can only be releasedv by readjusting the screw, M, to the position shown in Fig. 5.

1. A friction driven chuck comprising a driving element and a driven ele-ment frictionally engaged therewith, said driven element comprising two parts adapted for relative endwise adjustment and formed with mutually engageable abutments Ion their adjacent ends, and a spring positioned to react.

between said parts for holding said abutments out of engagement.

2. A friction drivenchuck comprising a driving element and a driven element frictionally engaged therewith, said driven element comprising two parts disengageably connected by a positive clutch device, yielding means adapted for holding said positive clutch in disengaged position, and means for locking said positive clutch in engagement in opposition to such yielding means.

3. A friction driven chuck comprising a driving element, a driven element frictionally engaged therewith, and a tool holder rotatably carried by said driving element, said driven element and said' tool holder being provided with mutually engageable abutments constituting a positive clutch device for rotativelyconnecting them, yielding means positioned for normally holding said clutch device in disengagedrelation, and a stop on the driving element adjustable for engaging-the tool holder to prevent endwise movement thereof-for locking the. latter in engagement/Withthe said driven element.

4C. friction driven .chuck comprising a driving element, a driven element frictionally yengaged therewith, and-a tool holder rotatably carried by' said driving element, said driven element and said tool holder being provided with mutually engageable abutments constitl'itingl a positive clutch device:v for rotatively'- connecting them, yielding means positioned fornormally holding said clutch devicein disengagedrelation, and' lllla stop on the driving element adjustable to preventing its rotation insaizd driving eleengage the tool holder for preventing endment.

wise movement thereof without preventing 6. A friction driven chuck comprising a 4rotative movement of said holder in the driving element, a driven element frictiondriving element, said A tool holder being ally engaged therewith, and a tool holder formed for thus engaging with the stop rotatably carried by saidy driving element, when positioned in engagement with the said driven element yand said tool holder bedriven element. v ing providedl with mutually engageable .5. A friction driven chuck comprising a abutments constituting a positive clutch'dedriving element, a driven elementV frictionvicefor rotatively connecting them, yield-Q ally engaged therewith, anda tool'holder ing means positioned for normallyholding rotatably carried by said driving element, said clutch device in disengaged relation, an

said driven element and said tool holder beadjustable stop on said driving element, and

ing provided with mutually engageable abutyielding means for causing the engagement ments constituting a positive clutch device thereof with the tool holder to prevent lendfor rotatively connecting them, yielding wise movement of said holder, together with means positioned for normally holding said adjusting means for positively withdrawing clutch device in disengaged relation, said said stop from engagement with sa'id holder. tool holder having a circumferential groove, ln testimony whereof I have hereunto set and a radially adjustable stop carried by theI my hand at Chicago, Illinois, this 15th day driving element adapted tol engage said of April, 1916,

groove Ifor locking said'tool holder in enj nagement with the driven element without J OHN M. BODENE.

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