US1380021A

US1380021A - Raising and lowering means in metal-working machinery

Info

Publication number: US1380021A
Application number: US190657A
Authority: US
Inventors: Albert E Robinson; Herman W Schatz
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-09-10
Filing date: 1917-09-10
Publication date: 1921-05-31
Anticipated expiration: 1938-05-31

Description

A. E. ROBINSON AND H. w. SCHATZ.

RAISING AND LOWERING'MEANS IN METAL WORKING MACHINERY.

I I i I APPLICATION FILED SEPT-10,19l7- 1 ,38() ,021 Patented May 31, 1921.

A. E. ROBINSON AND H. W. SCHAIZ. I

RAISING AND L OWERING MEANS IN METAL WORKING MACHINERY.

APPUCATION FILED SEPT. 10, 1917.

1,380,021. Patented May 31,1921.-

' 2 SHEEIS SHEET Z- ment with the arm,

ET srr "tart w n 1 ALBERT E. ROBINSON, or cINcINNATI, awn-"HERMAN w. ,soiia'rz, orf onwoon,

' OI-IIO. P '1 RAISING AND LOWERING MEANS IN MnraL-wonKINe lineme I Application filed September 10, .1917. v Serial No. 190,657.

To all to 710m it may concern:

Be it known that we, ALBERT E. ROBIN- soN and IIERMAN SoHA'rz, citizensof the United States, residing, respectively, at Cincinnati, and at. Norwood, in the county of Hamilton and State of Ohio, have-jointly invented certain new and useful Improvements in Raising and Lowering'Means in Metal-Working Machinery, ,of which the following is a specification.

Our invention relates to means for raising and lowering a substantially heavy, part of a metal working machine on a support or column, and it has for its object the provision' of novel means whereby breakage, due to carelessness or abnormal loads, is avoided. We have exemplified our invention as employed in a so-calleddrilling machine, for raising and lowering the drill-arm on the column. Themeans for efi'ectingsuch raising and lowering, or adjustment of the arm toelevation on the column, is exemplified as a screw-rod which has threaded engageand is arranged to be direction by means of gearing. .The. arm is arranged to be fixed to the column in its adjusted, positions. When so clamped, the arm is rigid with the column. If now an. attempt should be made under usual structures as heretofore .made, to raise or to lower the arm while the same is clamped to the'column, the operating parts would be subjected to excessive stress with the practical certitude of breakage of parts or stripping of gears. I 1 3 It is the'object ofour invention to avoid these objections, and to provide. means which perform their power transmitting function under normal loads and yield to. abnormal loads; further to provide yielding pressure means for such means; and, further, to provide means for adjusting the pressure.

rotated in reverse It is a further object of our invention to V provide-novel means for absorbing shocks or suddenstresses in the raising and lowering mechanism of the, character mentioned, as when the direction of movement of the raising and lowering mechanism is reversed, or the power thereof suddenly applied for effecting a change of elevation of the supported part.

The invention will be further readily understood from the following description which operates and claims, and from the drawings, inwhich latter: 'l 1 Figure 1 is afront a ate. era (i-na machine embodying our invention, .-and partly broken away. I;

Fig. 2 is a rear elevation of the same. Fig. 3 is a plan view -of ourgimproved device applied manta Ma er, ieeri' in a drillingzmachine,the

latter partly broken away,- and thetop gearcover removed.

. Fig. 4 is ,ayve'rtical-section of tihe same, taken in the .plane of the line 4+-4of Fig. 3.

Fig. 5 is averticalsection-ofthe-same,

taken in the plane of the line 5- 15 of The drillingmachine, exemplified as embodying our 1 invention, is shown as 'aradial drilling ma ehine, g including' a. base 11, from cylindrical-column, column be ng supported I and rotatable 1n any ordinary Orwell-known manner, 1 and Fig.3;

arranged to be clampedinfadjusted positions 1 3 tothe clamp 14., The column mayrepresentany suitable support. An-arm 15 is adjustable to elevation on the column and has, a bearing 16 about'the column.

post or base; by means of ausual j j Thearmmayrepresent any suitable bracket.v When in adjusted position, ,the -bearingv is arranged-rte be 4 clamped in fixed relation to the column by usual clamps v 17.

the arm, as by means of a ,hand-wheelflil,

a suitable pinion meshing with a rackz20 extendinglengthwise}of the arm, the drill-head beingslidable laterally has a "suitable drill-spindle rotatably driven and axially feedable on theidrillhead. It .may. have. a suitable tool, as a tothe table 25.

on the arm on *guideways 21. The drill-head 7 drill-arm on the col- 2 g umn, Inthe present. exempln'ication, being ll y perate l be v shaft extending lengthwisejof the drill.- arm, having usual operative connection with the drill-spindle for'rotatively' driving and for feeding the same. The shaft 31 has 'a' 70 which a post 12extend upwardlmthe post having a colu'mn'lS, shown as"a =rotat able received thereabout, the

I a drill-head 18-is adjustable laterally-ion i housing and in suitable i on a power bevel-gear 32 fixed thereon, which meshes with the bevel-gear 33 rotatable in and held axially to a bearing 34 on the drill-arm, an upright shaft 35 having spline-connection 36 with said bevel-gear 33.

The upright shaft is journaled in a bear-' ing 37 in the column and a bearing 38 in a cap and gear-housing 39 fixed to the upper end of the column, as by set-bolts 40. A gear 41 is fixed to the upper end of the upright shaft and meshes with a gear 42, which rotates with a gear 43, the gears 42, 43, being keyed together by a key 44. The gears 42, 43, rotate on a stud-shat 45 fixed in a bearing 46 of the gear-housing, as by a set-bolt 47. The gear 42 meshes with a gear 48, fixed to the upperend of a shaft 49, journaled in a bearing 50 in the gearbearings in the post 12, and having a bevel-gear 51 at its lower end, which is meshed by a bevel-gear 52, shaft 53, arranged to be rotated at selective speeds, as by means of a steppulley 54.

The means for adjusting the arm to elevation on the column are exemplified as a screw-rod 61, which has threaded engagement with the arm, as by means of a nut 62, received in a recess 63 in the arm, the arm finding support onthe nut by means of an annular ledge 64 of the arm, the nut being fixed non-rotatively to the arm by means of a set-bolt 65. The lower end of the screw-rod may be journaled in a bearing 66 on the column. The upper end of the screw-rod is received through a bushing '4" 1, located in a bearing 72 of the gear-housing 39. The bushing has a shoulder 7 3, whereby it has support on the bearing, and an enlarged journal-part 75. A collar 77 is received about the screw-rod, being pinned thereto by a pin 78,-the collar-bearing.

lower end of the bearing 7 2. A

against the I 81 is provided for the supporting bearing screw-rod above the bushing 71, this supporting bearing being exemplified as a ballbearing, an end-thrust collar'82 resting on the ball-bearing and having threaded engagement 83 with the screw-rod. The endthrust bearing may be pinned to the screwrod by a pin 84.

Collars 86, 87, are received about the screw-rod, the axes of'rotation of the collars being comcident'with the axis of rotation of the screw-rod. The collars are rotatively fixed to the screw-rod, as by having spline-connection 88 therewith. Bela tive axial movement is permitted between the collars. The respective collars have friction-

flanges

91, 92; A gear 93 is provided with an inner friction fiange 94 received between the

frictionfianges

91, 92. The gear has a central bore 95, the wall of which bears on the annular hubs 96 of said collars'86, 87. Friction washers 92'', 98, are

received between the triction fiange on the gear and the frictiomfianges on the respec tive collars. The washers are axially positioned with relation tothe fiangesby being provided with central bores 99 in which said hubs" are received.

The gear 93 meshes with a gear 101 journaled on a stud-shaft 102 secured in a bearing 103 of an arm 104 of a rocking lever 105. A gear 106 is fixed tothe upright shaft 49 and in the present exemplification rotates with the gear 48. The

gears

43, 106, rotate in opposite directions, efi ected by rotation of the gear 106 by the shaft 49, the rotation of the gear'48 with gear 106, the meshing of the gear 48 with the gear 42, and the rotation; of the gear 43 with the gear 42. V

' The

gears

43, 106, 42, and '43, normally rotate. The gear 101 is'normally out of mesh with both the

gears

43 and 106, When brought into meshing relation with one of said gears, the gear 101 is rotated in one direction, for rotating the screw-rod in a given direction, and lowering the arm on the column. When the gear 101 is caused to mesh with the other of said gears, the gear 101 is rotated in the opposite direction, the screw-rod being oppositely rotated, and the arm raised on the column.

It is necessary to unclamp the bearing of the arm about the column prior to the raising or lowering of the arm. Sometimes, due to carelessness, the operator attempts to raise or to lower the armvwithout unclamping the bearing. Tn case this is done breakage of parts or stripping of gears in my improved device is prevented, by the fact that the gear 106 is permitted to yield with relation to the'screw-rod through the medium of the friction devices coacting therewith.

. The rocking lever 105 comprisesthe arm 104, to which the stud-shaft 102 is secured for carrying the gear 101, and an arm 111 which is an operating arm. The rocking lever has a bearing 112 about the enlargement 75 of the bushing 71. The rocking lever is operated by means of a rocker-rod 115, journaled at its lower end in a bearing 116 of the column, and at its upper end in a bearing 117 in the gear-housing 39. The rocker-rod is provided with'a handle 118 extending radially therefrom for rocking the rod. A segment-gear 121 is secured to the rocker-rod at its upper end, this segment-gear meshing with a segment-gear 122 on the operating arm ofthe rocking lever. In order to 'efi'ect rocking movement 01. the rocking lever to proper extent to obtain proper meshing relationbetween the gear 101 and the

respective gears

43 and 106, means are provided for limiting the rocking movemen of the rocker-rod, accomplished by providing the segment-gear 121 with lugs I23, thr'0ugh which set-b'olts124; extendgact ingas stops; the set-bolts being adjustable in said lugsand clamped'in adjustediposi tions by meansof jam' nuts 125. The pro ments; the spring being-received aboutfanj upper threaded end I32'0f the' screw ro'd and man annular recess 133-of a nut -13{t.thread+ ed to said threaded endforiadjusting-f' the tension-'ofthe spring. Ajam-bolt 135 is received the threaded bore of the me I andis arranged'to 'impinge' the. upper end of the screw-rod for "locking." the nut in I a djuste'd' position. The nut and 'jamrbolt-i are received through an aperture 136- inllthe gear-cover 137,5 so that'the same-"may be adjusted from the outsideof the machine. i y meansof our improved device aresili ent pressure is applied. to'the frictionele; ments, for causing the" same to: act: under normal pressures or'wloads and preventing an undesirable slippage betweeni the --fric'- tion elements, and insuring the coactionof the friction elements duringnonnal loads. The degree of resistance of the frictiofnelee ments is adjusted by means of the-adjustment of the spring, .so that the resistance under .which the friction: elements. 11 shall yield; maybe adjusted inraccordance'with theloadit is desiredt-hat the 'frictioni'ele ments shall move. j The spring further aids the" friction-elementsin acting as a cushion in theipower transmission to the screw-rod, and in absorbing the shocks incident to initiating movement in the screw-rod, and occasioned by reversals 1 of, rotation thereof, andfcom- 'pensates' for suddenstresses therein.

If now an attempt be made-to raise or lower the armduring clamped-relation of the bearing thereof about.thezcolumn, the friction elements will yield so asr'topre: vent injury ofthe'partsj .or stripping of teeth of the gears. If, furthermore,-itheatytempt be made toimpart suddenrotation'to the screw-rod for instance in raisingrthe arm, resulting instress upon the partsor the teeth of the gears; in excess of the load contempl ated for the] same, the friction elements will yield until the resistance. thereof overcomes the inertiaof rest of the load and initiates the movement'of the load with out shock. I Q. Having thus fully described ouryz-invention, what we claim as new and-desire to secure by Letters Patent, is.

1. In a metal working machine, 13116100111 bin-ation of'a' support, a part: adjustable to elevation. thereen and means for: adjusting.-

tien' member between said driving member resilient means acting on 'saicl pagrt to elevation comprising friction transmitting .means; arranged to transmit normal loads and toyield-to -abnormalfloads,

and neansfo'rsupporting said .partiinder pendent of'the friction contact. of said frie -m1tting means arranged-to. transmit under normal'loads and to yield to; abnormal loads, means: for supporting said part, duringkad+ justn entslof i said: part, independent of. the

friction contact of said friction transmitting meanafandirieans for 'adjustin-g the :t 'ransmitting effect of, friction transmitting means. n 31min aimetal Workingmachme, the comele nation therecmmean's for adjusting said part; to: ielevation acompnsing a friction transmitting ,means arrangedgto transmit undernormal loads'and t-oyieldto abnormale loads, means-rfor supporting said; part independent; of. the friction contactinsaid friction transmitting means I during; I adj ust ine'ntsJof said. pfa'rt,- and; yielding pressure means for cushioningsaid-friction transmit! tingzmeansm at In a :metal working machine; the oombination efasupport,fa partiadjustable to bination of-;a;-.col'umn;1 an. arm, meansfor raising and lowering-said-earmpn said 091% ,umn compr singa nut non-rotatively'ifixed,

to said arm, an upright screw axially held and-rotative with relation to ssaid cclumln saidscrew constituting .a' driving member,

power-'tnansmitting fric a; driven member,; a

and: saiddrivenmember arranged to yield to xabnormalaload and to cause driving relation between saiddriving driven member under normal, loads} and said power-trans,- mitting friction member raising'and lowering ;means.-5a a 5. 111 a" metal workingmachine, the com.- binati-on of-a column; ail-harm, meanszfor raisingrandlowering'said arm onsaid column; comprising a nut non rotatively *fixed .te-said arm, an upright screw axially-held and rotative with relation to said column, a" driving member, Said "screw constituting a? driven member, a power transmitting frici tien-Zmember between said driving member and saiddiiven member arranged toqyield to abnormal load and to cause driving 'rela tion; between said driving member "and said driven member under normal load, resilient meansacting on said power transmitting friction member to cushion said-raising and lowering means, and means for adjusting "said; resilient means. u .5.. 111a; metal, working machine, the'com member and said a bination of a column, an arm adjustable to elevation thereon, means for clamplng said arm to said column in ad usted positions and means for'adjusting said arm to eleva' tion on said column comprising friction means including a driving member, a driven member and a friction member therebetween, and a coacting screw and nut. havingelevating and lowering-efiect .on said arm, said coacting-screw and nut supporting said arm against 'gravity'indepe'ndent of the I friction contact in said friction means, arranged to yield during clamped relation of said arm on said column and to adjust said arm on said column during unclamped relation of said arm.

7. In a metal working machine, the combination of a column,-an arm adjustable to elevation thereon, an upright screw-rod extending lengthwise of said 'column having threaded engagement with said arm for raising and lowering the same, a supporting bearing for said screw-rod, an end-thrust collar fixed to said screw-rodand supported by said supporting bearing, means for rotating said screw-rod comprising a gear whose axis of rotation is coincident with the axis of rotation of said screw-rod, a collar rotatable with said screw-rod, and friction means between said "gear and collar arranged to rotate saidi screw-rod =under normalloads on said screw-rod and to yield to abnormal loads on said screw rod, said end-thrust bearing sup-porting said screwrod independent of the friction contact in said friction means. Y

8. In a metal working machine, the combination of a column, an arm adjustable to elevation thereon, anupright screw-rod extending lengthwise of said column having threaded engagement with said arm for raising and lowering the same, a supporting bearing for said screw-rod, an endthrust collar fixed to said screw-rod and supported by said supporting bearing, means for rotating said screw-rod comprising a gear whose axis of rotation is coincident with theaxis of rotation of said screwrod, a collar rotatable with said screw-rod, friction means between said gear and collar arranged to rotate said screw-rod under normal loads on said screw-rod and to'yield to abnormal loads on said screw-rod, and means for adjusting the friction resistance between saidgear and collar, said end=tlirust bearing supporting said screw-rod independent of the friction contact in said friction means.

9. In a metal working machine, the combination of a column, an arm: adjustable to elevation thereon, an upright screw-rod extendinglengthwise of said column having threaded engagement with said arm for raising and lowering the same, a supporting bearing for said screw-rod, an end-thrustwhose-axis of rotation is coincident with the axis of rotation of said screw-rod, a collar rotatable with said screw-rod, means between said gear and collar arranged to rotate said screw-rod under normal loads on said screw-rod and to yield to abnormal loads on said screw-rod, and means comprising a spring actingyieldingly on said friction means for cushioning said friction means, said end-thrust bearing supporting said screw-rod independent of the friction contact in said friction means. 10. In a metal working machine, the combination of a column,'an arm adjustable to elevation thereon, an upright screw-rod extending lengthwise of said column having threadedyengagement with said arm for adj usting said arm to elevation on said column, a supporting bearing in which said screwrod isljournaled, an end-thrust collar fixed to said screw-rod and supported by said supporting bearing, a gear about said screwrod whose axis of rotation is coincident with the axis'of rotation of said screw-rod, opposed collars' arranged to rotate with said screw-rod and having relative movement be tween them axially of said screw-rod, said gear provided with an annular flange received between said collars, friction washers between said flange and each of said collars, and resilient means causing coaction between said fiange, said collars and said friction washers, and said end-thrust collar sup porting said screw-rod independent of the friction contact in said friction means.

11. In a metalworking machine, the com bination of a column, an arm adjustable to elevation thereon, an upright screw-rod ex tending lengthwise of said column having threaded engagement with said arm for adj usting said arm to elevation on said column, a supporting bearing in which said screwrod is journaled, an end-thrust collar fixed to said screw-rod and supported by said supporting bearing, a gear about said screw- 'rod whose axis of rotation is coincident with the axis of rotation of said screw-rod, opposed collarsarranged to rotate with said screw-rod and having relative movement between them axially of said screw-rod, said gear provided with an annular flange received between said collars, friction washers between said flange and each of said collars, resilient means causing coaotion between said flange, said collars and said friction washers, means for adjusting the pressure of said resilient means, and said end-thrust bearing supporting said screw-rod independent of the friction contact in said friction means. I

12. In a metal working machine, the combination of a column, an arm adjustable to 130 elevation thereon, means for clamping said arm to said column, an upright rotatable screw-rod having threaded connection with said arm for raising and lowering said arm on said column, a bearing for said screw-rod for supporting said screw-rod in the direction of its axis, an end-thrust collar fixed to said screw-rod and supported by said supporting bearing, opposed collars rotatable with said screw-rod and having axial movement between them, a gear provided with an irmer annular flange received between said collars and having an axis of rotation coincident with the axis of rotation of said screwrod, friction-members between said flange and each of said collars, means for exerting yielding pressure on said frictionemembers, means for rotating said gear in reverse discrew-rod through the medium of said fric tlon-members'during unclamped relation of sald arm, and said friction-members permitting rotation of said gear with relation to said screw-rod during clamped relation of said arm to said column, and said end-thrust bearing supporting said screw-rod independent of the friction contact in said friction means.

In testimony whereof, we have hereunto signed our names in the presence of two subscrlbing witnesses.

ALBERT E. ROBINSON. HERMAN W. SCHATZ. Witnesses: I

CLAYTON H. CoRMANY,

MABEL Hmsr.