July 11, 195o G, T, H, ENQUlsT ' 2,514,569 RELEASABLE COUPLING DEVICE i ‘f- l/y Vf/yroß July- ll, 19,50 G. T. H. ENQulsT 2,514,569 RELEASÀBLE COUPLING DEVICE Filed NOV. 16, 1945 _ 2. Sheets-Sheet 2 f/é’â 0&7. , L f6.9. 5 5* um @ÈP ¿a ¿5 \ »Wa/a.“ / Patented July 11, 1950 2,514,569 `UNITED STATES PATENT OFFICEA " 2,514,569 RELEASABLE COUPLING DEVICE Gíista Thure Harry Enquist, Hammarbyhojden, Sweden Application November 16, 1945, Serial No. 629,067 In Sweden September 1, 1944 4.l claims. (C1. 192--38) 1 2 Fig. 6 is a longitudinal section of- a modified ’ 'I‘his invention relates to a coupling device for engaging a shaft with and disengaging it from form Fig.of7 the is a device. cross section taken on f the ' line li--L` f. a -surrounding sleeve member in which device Fig. 6. Wedging clamps are adapted to lock between the Fig. 8 is a longitudinal section >of a cog-wheel ` shaftand the surrounding member, the shaft and 5 transmission gear provided with coupling devices the surrounding member being axially slidable in according to the invention. 1 l relation to each other along contacting surfaces. Fig. 9 is a longitudinal section of a-.further form - According to the invention the contacting sur of the coupling device. l ‘ faces of the shaft and the surrounding member are each provided with a groove, one groove 10 housing a freely rotatable and axially guided ring the other groove forming a cam race for a‘number of clamps axially guided in said other groove. The axially guided clamps connect the shaft with the surrounding member and alter natively one of the slidable shaft and sleeve members with the freely rotatable ring by wedg Fig. 10 is a cross section taken. on 'the line II--II,` Fig. 9. ` . ‘_ ,In the embodiment shown in'Figs. 1-4 a rotat able shaft 6 has a groove forming a non-circular cross section 'I on the shaft and in the space be»y 15 tween this recessed part 1 and a sleeve 3 sur rounding the shaft clamps 2 are inserted, egg. rollers or balls. The sleeve which may be fixed or rotatable is provided with an inner groove' ing at their relative rotation according to the housing a freely rotatable ring 4. Betweenvthe axial displacement of the shaft to the surround ing member. The coupling device may be pro 20 pairs of clamps lying on each-side of the- non vided with a rotatable shaft and a fixed sur rounding member by means of which the shaft circular cross section of thev shaft separating springs are provided. To hold the freely rotat able ring 4 in its place in the sleeve 3, the sleeve may be provided -With a flanged ring,‘threaded.on is arrested to the lixed surrounding member and disengaged from it. Alternatively the shaft may be fixed and the surrounding member freely ro 25 its end. According to the axial displacement .of the shaft 6 of the coupling device‘in relation to tatable in which case the surrounding member the sleeve 3, or vice versa, wedging is effected in may be arrested to the shaft or disengaged from one position (Figs.`1-2) between the non-circular it. v_ In a further modification the shaft and the section 'l ofthe shaft forming a cam race surrounding member are freely rotatablel where 30 cross for the clamps 2 and the surrounding sleeve 3 by by the surrounding member by wedging may be turning of the shaft, the shaft being engaged with engaged to rotate with the shaft. the sleeve 3, while in the other position (Figs. 3-4) . ~l`The member surrounding the shaft may con Wedging is effected between the non-circular‘sec sist of a sleeve or a ring, a Wheel, e. g. a cog-Wheel, tion l and the freely rotatable ring ¿l by meansof a band or belt pulley, etc. or have any other con the clamps 2. n .¢ venient form. The coupling device according to 35 In the modification shown in Fig. 5 the space the invention is principally advantageous in that between the non-circular section 'l ofthe vShaftthe wedging is effected in every position so that and the surrounding sleeve is partly filled up by an exact engaging, arresting and disengaging four clamps 9 each of Whichcorresponding to may be obtained without any friction or back lash. 40 one-fourth ofthe cam forming groove, is ma For example great advantages can be reached chined into the shaft. The pairs of clamps 9 on by using the invention in a cog-Wheel transmis each side of the oval section ‘l are separated by sion gear inasmuch as a gearing change is pressure springs 8. ` ç - achieved exactly without any back lash. Fig. 6 shows a longitudinal section and Fig, _7 In the accompanying drawings, which show by 45 a cross section according to the line I-I in Fig..6 way of illustration or example, different forms of another modification of the' coupling‘devîce of the device: ì which is provided with two sleeves Il .andl 29" in „ Fig. 1 is a longitudinal section of one form of each of which shafts .26 and 22 are inserted and the 4device in engaged position. ' prevented from turning in relation t0 thecorres Fig. 2 is a cross section corresponding to Fig. 1. 50 sponding sleeves .by longitudinal grooves and prof’ Fig. 3 is a longitudinal section of the structure jections l0 and 2|. The sleeve 2li ñxed to one shown in Figs. l and 2 in disengaged position. of the shafts 22 is provided with a non-circular Fig. 4 is a cross section corresponding to Fig. 3. cross section 24, here as shown of a square shape. Fig. 5 is a cross section showing a variant form In the space between the bottom of the groove of the clamps producing the wedging eifect. 55 and a coupling sleeve I3, I9 surrounding the two 2,514,569 3 4 sleeves II and 20 rollers or balls I4 are inserted which lock the sleeve I3, I9 to the sleeve 29 by a wedging effect when the sleeve I3, I9 is turned in relation to the sleeve 20. When the sleeve I3, I9 is displaced in axial direction to the left, the sleeve I3, I9 will be disconnected from the sleeve 20, the clamps I4 being locked by a Wedging effect to a ringMìffreelyv rotatable in an inner groove in being provided each with a groove, one groove housing a freely rotatable and axially guided ring, the other groove forming a cam race for a num ber of clamps housed axially guided in said other groove, the said clamps connecting the said shaft with the said surrounding member and alterna tively one of the said slidable members with ther` said axially` guided ringo-‘by wedginggat their rela tive Vrotation according ‘to the axial displacement the sleevef'l3; I9. The'sleeve I3, I9 is locked to the shaft 26 in every position by a projecting pin 10 of the said shaft to the said surrounding mem ber. 2.. Acouplingdevice comprising a freely rotat able shaft and a fixed surrounding sleeve mem 23 which enters a longitudinal groove 25 in the sleeve il surrounding the shaft 23., Eor the. mounting of the sleeve I3, I9 it is divided intotwo parts I3 and I9 fastenedatogetherrby;screws».. I8. The displacement of the coupling sleeve in: axial direction may suitablvbe .limited ,.by, a ring, I'I of bearing metal ñxed in‘a groovetinthe` sleeve 20. berihavingztcontactin-g surfaces, the said rotatable `shaft being axially slidable in relation to the said fixedsurroundinggmember and the said contact ingsurfaces being provided each with a groove. one groove housing a freely rotatable and axially guidedïring, the other groove forming a cam race for a number of clamps ¿housed axially guided in As a further example of a device accordingwto» the invention Fig. 8 shows a transmission gear. . Th'eagear housingisïdividedfinto two halves-28, 34 bearing two shafts 21, 44, ornwhich `cog-_wheels 2.9,.3ß,~:3|~; 32,133; respectively 44%3,~ß36,¿4l7, `48, 49 'are arranged. said..v other groove-z the.:v said: clamps:` connecting thezsaifd rotatablerashafti with",athensaidrñxedusurgl rounding `'member and"alternatively‘withrtheiSaid; axíal'lyf’guided.. ring:;by¿ Wedging;accordingltoathe: The shafts 21, 44 are movable to# axial,J displacement of» the :said¿rotatablershaft :.‘to' gether » in :axial , directionifby fan‘ :operating :bar 39, ~ which:actsfsimultaneouslyvon the :two lshafts 2 1, 44 with a connection .3.8gig4ü.' On‘correspondingl placesrtheeshafts:21,144 are provided with re cessed non-circular cross se1ctions¢f31g 4-'2 -andfr in thersaidsurroundingtmember.; . ' 3. A coupling-.device -comprisingga<1'ixedrshaft» and a'íreelyY rotatable.surroundingrisleevef .fmem ber having contacting surfaces, ,the¿said:rotatable7 thîe recesses'fclamps„36;v 43 . ‘arefinserted' which by 30 Surrounding lation to the-_saidnxedL-shaftandfthe members beingraxiallygslidablein said. ‘con-.r1 a Wedging eiïect lock to the shafts one or another ofnrthe pairs of> corresponding;cogfwheelg 29 and 45,? `3ßs,.`and¿;4G`,-' 3l yandai-‘Ig 3-2l and ‘48; and 33 and tacting; surfaces being.; provided each with., afv groove; one, groo'vahousingf. a- freely, rotatable` 49;: respectively:A Forrintere'releasing ' the,~ shafts freelyrotatablezrings 35;: 41V` areprovided accord ing,itoî~tli^e;invention within; the bearingsriof the 35 and axial1y¢guided¢ring,,the .other groove form-f` ing-ça camY race-fora number of clamps:«.housedl> axially guided:> in said other.“grooveptheesaid respectiveî shaftsiin .the 4halfißdîof the: >gear hous clamps ~» connecting ,thesaid .'ñxedsshaft wi-thl--fthet- ings.; said rotatable .surround-ing.- memberf anda-:alternas:1 tively with the vsaid .axially guidedringgby fwedg-e FigssQ and lûïshow a'devicezin whichA the sur roundingv member :is vprovidedfwit'h vthe noni-cir ing _ according _.1 to ...ther axial - displacement -. of»l thez». culart'cross sectionzforming; the -camfrace for the cla-mpsandïFig; 91 gives a longitudinal section said fixed-1` shaftto -the.~.said=. rotatable surroundsç ingmember. 4.` A couplingrdevice» comprising a freely-.trom while'Fig; 10 ‘Ashowsfta .crossxsection :according to the >lii'ïefîI'I-Ll--II in;Fig;g 9. Oneiend‘of fthe vshaft 50 isîcutidowntoa round tap 55 towhich a sleeve 55" isy fastened enclosing .airing-"5I : freely rotatableround Sthe: tap155a- Theringfäfl may consist of aball. bearing-as shownlrin the figure. The sleeve 5521`isisurrounde'dlby a member consisting of-‘a cogswheelf5211and§having itsV inner portion pro-vided-“with anon'acircularicross section vl54; This tatable vshaft and` ~,a .freely rotatable..surroundingy sleeve'I member having .. contacting ysurfaces. .. and. being `.axially slidable in_relationto. each fother; theA said ,contacting surfaces being, provided :each Witha groove, .onegroove- housing..a freelyy rofv tatable and ,axially vguided. ring,Y .the..other.groove`.. forming acam. race ,fora number` ofH clampsl housed axially guidedin saidlother. groove„th“e, said clamps `engagingthe. saidsurrounding mem cross. section has;v a - chieñy square Vshape and l:in thesp‘acel between that` square .cross sectionfand‘ theisleeve; clamps fET'aref inserted vwhich are sep ber to rotatewiththe saidrotatable.shaftand arated by springs 58. One side 53.1ofithercoge wheel may be» dismountable for‘insertion'of the member from _the- saidrotatab‘lé. shaft according'.v to the ,axial` displacement'~offthe saidllrotatablë», shaft to the -saìd'surroundin‘g member. alternatively disengaging.. thesaid surrounding(> clampsïrâfl." `The invention may be variedwithin >the limits Gös'rA THuRElHARRY-:ENQUISrr_ given-byrtherclaims following :hereinafter` and the shown examples aretobe 'consideredsolely as il lustrative as regards the:possibilities„~of "using'the EEFERENGE‘S Y- GITE!) ‘<1’ invention:` Thev nom-circular cross section may ñle Ther of’this following patent: references , are. offlrecordln haveany number of wedging surfacessand clamps depending'on the desired'number'ofwedge angles andthe v form of 4the:Wedgi-ng»‘parts.f.. UNITED. STATESiPATENTS z 65 Number 1I A“coupling':device.comprisingla shaft meme berA andv a1surroundingßleeveïmember ‘having con' 2,291,151' tactingîsurfaces -andrbeir'ig.axially slidablein 'rela'-- 2,382,331 tiorr to.f.~each': .i other; thessaid? contacting ` surfaces 70 1,680,751 Name’ , Date Spase ________ __r____ Angl'14519285 ___________ __ July 28541942 Peterson 'et al."- ____ __ Aug-1:14? 1945€'