US1609494A - Electric-motor-driven spring hammer - Google Patents

Description

Dec. 7, 1926.

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Dec. 7,1926@ W. S. PAYNE* vELECTRIC MOTOR DRIVE SPRING HAMMER Filed July 11, 1923 2 Sheets-Sheet cri.

A' Patented Dec. 1926i.

WALTER s.V PAYNE cir ,Uiiivnnsnr 'innen NEBRASKA.

Application ieaauiyii, .1323.ser'iai-Nb. starei:

This invention relates toan improvedv electric motor driven spring hammer, and lis a simplification. and yimprovementy with respect to the device shown and described in my Patent 1,356,556, dated OctQGth, 1920. One objectfof Vthis inventionis to simplify and reducethecost of manufacturing a ma:v

chine of this character.byeliminating the liaminenlock and hammer-case-lock aswell as other parts which formed elementsv of the above Vmentioned device (of Patent No. 11,356,556). Y .A e Y i Another object is to it works in otherdevices of'thischaractenf Another object-is tojdoublelthe numberv of'blo'ws-or hammer-strokes,'j as compared.

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,with'the number piroducedbyfa given numL` ber of `revolutions of thecam-carrying shaftr that constitutes part of thehammer-driving e mechanism;- i 'i Another' obj ect sion or weightwhich adds impact tothe hammer. -v

Another object is to provide an improved,f yet comparatively simple spring-pressed` means foi1 automatically *and securely locking the hammer-case and cam-crosshead in their screw-threaded vengagement lwith thef Other objects and. advantages'. `will bei pointed out or'limplied in.. the following details of description,v in` connectionv 'with y pin or Vother.securing iiieaiis;fAs-tlie"came the accompanying drawings in which:-

Fig. v11;, ifs-'a somewhat diagrammatic viewAV .whichwshows'the interior-of the main shell (which mayV bev of any number of unitedv parts) and the elements contained therein;

' guide and cam-case.

Fig. 2 is a view. of the combined'cam-case and hammer-case, its :intermediate: part being broken out. i

Fig. 3 .'s a view of the combined hammer- Fig. 1 is a view of theihammer audits extension orweight.v I I.

j Fig. 5 is a view showing threedifl'erent views of the double cam-device in the same l u osition. 5o p' Fig. 6 is aj view` of the `gearing. which operatively shaft. A f

yVVithin'the main-shell, anl motor is. indicated :at 5, and its driven shaftr" z carries a gear wheel'7 VwhichY meshes with lmake, the? hammer- .plunger work freer, in the hammer-case than f yis toprovide a simple and-- f comparatively inexpensive hammer-extenconnects the motor to thecamf..

a gear wheelS whose shaft or axle also carries a gearwheel- 91the latter meshingV with a gearfwheel 1 0 onfa'shaft or aXle 11. The shaft 11 carries av cam-member 12 which VVis .the4 first elementtliiisfarfnanied .which is different .from the electro-mechanical driving niechz'inisiiivA shownin my prior patent,

above mentioned.

rI helrotary'Cainmember 12' hasit's compleinentln 4no iirotary Vcani-'member 13V which i .is `securedl against rotation inl ia coiii bined hammerguide andfcamfcaseoi camguidingmeniberle and` reciprocat`es in the latter. A@ hammer-case or toolcarryiiig member 15. is provided withlslots or-` 'ie cesses 15, A hammerl "isf in theI` hanimerfcase and' has arms" or 'legslT which lslide.Y

in slots; '14a ofthe member 14; andalso 'in theslots 15a ofslmember lwhiclrare alinedwithV the slotsfleh- 'g These armshave `lugs Natl-iat fitiii lnotches 13a-ofthe `v,non-rotary cam `and 'are heldwiinfthese notches-by the? pressure'of a spring 18'l whose rear end presses againstthe cani-case while its -fron'tV 1 end presses against the-hammer in the rela-' tion 'foi-l` shooting -they hammer forward;-y atV each half'revolution'ofthe camm'ember V12. u i

shaftr'llfexten'dsthrough-fthe 'cam-1i3,' theV latter being in the Aform fof a hollow/cylin vIt lshoufldof course be understood that 'the deinV The cainltZV is alsogin the form of a` hollow cyliiider,but its axial bore isfitted 1 around the-forward vendof the shaft 11,aii`d i securedf` thereto with a Vtapering diametral memberV 12vv rotates, its caiiiffaces slide on thosefof.thecainfl, and thisipi'ishes the lat; i .ter rearward. Vduring the travel of cam 127s f highest or rearmost points .toy the highest or foremost vpoints of` the 13; but when these highest points vhave passed one another,

other as 'isshown 'in the drawing. This shooting forwardY Y' of the .hammer occurs.

.twice in each lrevolution ofthe `cam-member the spring'lfshcots thehaminerj 'forwardIl 'l vand the canis-then-intermesh with one an 12whichV has two diametrically opposite cam-faces, the cam 13 also havingY such opposite'cam faces.l Each Vtime thehammer is shot forward, its front .end strikes the vshank 19 ofthe riveting tool, 'chisel Orothei' ius' l v D fof the'spring 18, I providea rearward extension QOMwhich may beef soft steel, or

wroughtiron andV has a screw-threaded.c`on-v neotion with the're'ar end of the hardened 'steel hammerhead. Thisweight 2O isr rela;

ytively long and of'snialler diameter than the interioro" the spring 18, and lit' itwere of hardened steel, or anintegrally formedpart i of the lialnmefsliead, itwouldhelikelyto `Vsiteholesofan internally threaded shell or `,hollow cylinder 24 whose'front end abut'sy break off in consequence of the'vibratio'ns Caused byY the rapidly repeated Y impacts.

llfhe mainbody of the member 20 lis cylindri-- cal and hasa slet aerossisits rear end for re- Y ceiving a screw-driver wherebyito screw or unscrevv it.

The Ca1n-case is lprovided with a diame,

tral bore Qln which carried two lockingv plnngers or pins 22, and between them-1s a,

spring '23y which pressesthem' outward through, slots 17'b into diametrically. oppo-v against an annular shoulder 25' of the outer casing orY hammerfcasehousing;and the rear.

'91161. Offthamember ,abutsfaganst a ball-1vk bearingavwhich:'comes into `use when the l machine is used for'drilling orvboring Vas desoribed-,inV thefprior-r patent; above named. rlfhe pins`22 extend through the recesses '15a i andgtheneeyinto diametlically disposed openingsh. ofthe shell'f24, vand when thus `litted while the-pins are engaged with the shell Qh the iner'nbersjlt, l5 `and, 24 are iminovably locked with relation to one another;and to unloclrthem, itis necessary to pressV thepins 22inward vso that thelmemberslt') 'and 24 arey free from engagen'ient therewith. These p IlS o an be held depressed by any, appro-v priatemeansfWhilethese parts are being as. sernbled,y andl when they arevv releas,ed,gthe:

springo23automatically operates Vto cause the pins; to lock-them in V,the assembled relationa Each of these pins22hasia shoulder to limit avoid bearing` its OutwardV nioveinent4 and against the outer shell.

The parts not speeiicallydeseribedinpthisf specification :are: shown and Y described in, one.l

angles .te il* rrnember,l said tool-@arr or more of my priorpatents, especially the one above referred to. Y f f Y o Al hough theY present drawings .show slots `l?? through the legs 17, itshould he under-v to theenact. details of `Construction'and var-VV rangement hereshownybut changesyinay be.

made within theqseopefoi: the inventive .ideas as .implied and claimed.

llhat claim v as `niyinvention is t l.- In?amachine of the character described,

the coinhination of, a Canifguiding inenjiher having-s1 an rextern-al.ly 4serew-threaded part and al reduced cylindrical part forming seat, torvf-acompression springend also hav,-

' inga radialnbore which latter opens-through said cylindrical part, a tool-carrying ineinhaving. a Vscrewfthrea@ledbuter Surface; and a recess adiacenti@thetlattel, '21- hollow-Cyl? 'luder having internally threaded' :part te mesh with the screwtlreadsfef the rfst; Seid member and., tool-Carrying; melnber frfuntf ing them, and a spring-pressed pinLinsaidok/ 'ra-dial. bore andi normally pressed.. byrts springV so that@ it extends: throughsaidfreeessV inte e,11.segelnelett.Wn'Saidfhelow. Cylinder for locking the cam-guiding member'-A andy wel- Carrying member and. hollow Cylinder mali/X601 screw-threaded relation t0 one am other,

pin-,having @reduced Outer; end' Pertionfantl having an alnitinent7 said hollowl Cylinder-V liaving Y an lopen-ing to f receive, .the reduced end ortfion said Vabutmentnormali enea@- Y 27 23 ing thefwall of the opening' to prevent' theI pin freni passing outv through said'openin.

- Intestimony whereof I atixfmy signature.

. VALTER S; PAYNE.,

2- '-liefstruture defined .by Claim lJIA said,

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