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July 11, 195o
G, T, H, ENQUlsT
' 2,514,569
l/y Vf/yroß
July- ll, 19,50
G. T. H. ENQulsT
Filed NOV. 16, 1945
2. Sheets-Sheet 2
5* um
@ÈP ¿a ¿5
Patented July 11, 1950
Gíista Thure Harry Enquist, Hammarbyhojden,
Application November 16, 1945, Serial No. 629,067
In Sweden September 1, 1944
4.l claims. (C1. 192--38)
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
Fig.of7 the
is a device.
cross section taken on
f the ' line li--L`
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.
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.
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.
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:
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
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
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
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
. '
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
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
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-
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
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(>
`The invention may be variedwithin >the limits
given-byrtherclaims following :hereinafter` and the
shown examples aretobe 'consideredsolely as il
lustrative as regards the:possibilities„~of "using'the
invention:` Thev nom-circular cross section may
are. offlrecordln
haveany number of wedging surfacessand clamps
depending'on the desired'number'ofwedge angles
andthe v form of 4the:Wedgi-ng»‘parts.f..
1I A“coupling':device.comprisingla shaft meme
berA andv a1surroundingßleeveïmember ‘having con'
tactingîsurfaces -andrbeir'ig.axially slidablein 'rela'--
tiorr to.f.~each': .i other; thessaid? contacting ` surfaces 70
Spase ________ __r____ Angl'14519285
___________ __ July 28541942
Peterson 'et al."- ____ __ Aug-1:14? 1945€'
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