US2875573A

US2875573A - Twisting spindle

Info

Publication number: US2875573A
Application number: US497310A
Authority: US
Inventors: Gerhard A Kohler
Original assignee: Schiess AG
Current assignee: Schiess AG
Priority date: 1954-04-06
Filing date: 1955-03-28
Publication date: 1959-03-03
Anticipated expiration: 1976-03-03

Description

March 3, 1959 G. A. KHLER TwIsTING SPINDLE ZSheets-Sheet l Filed March 28, 1955 @www IUU.

arch 3, 1959.3

G. A. KHLER TWISTING SPINDLE:

Filed March 28., 1955 2 sheets-sheet 2 /NVENTP @www Unid Staes Peter 10,

TWISTIN G SPINDLE Gerhard A. Khler, Kaiserslautern, Germany, assignor to Schless Aktiengesellschaft, Dusseldorf0berkassel, Germany Y The present invention relates to spinning or twisting spindles and, more particularly, to coupling means for use in connection therewith. v

Spinning and twisting spindles, particularly those which are driven by a driving shaft throughta positive drive 'such as worm lwheel drive, screw drive or spur gear drive, comprise a clutch by means of which the spindles may be` driven or may be drivinglyconnected to or disconnected from the driving shaft. The heretofore known clutches used in connection with such spinning or twisting spindles act by positive connection and/or frictional connection, for instance, while taking advantage of the centrifugal force of more or less heavy clutch members. Therefore, clutches of this type are relatively sensitive to torque. When large cop weights have to be dealt with, the clutches must accordingly be dimensioned rather heavy and voluminous `in order to assure a safe carrying along of the loaded spindle. Inasmuch as the space available for arranging the clutch and driving elements for each spindle of a spinning or twisting machine is limited and cannot t be increased without considerable changes in the entire construction of` the machine, it is an object of the present invention to provide a clutch for spinning or twisting spindles which will allow a reliable operation of the spindle, even when large cop `weights and greatlyvarying speeds are concerned, l without considerable changes in `the: spinning machine. 'p t. f .i

`It is t another object of this invention to` .provide a spinning or twisting spindle with clutch means which will make 'it possible to start operation of the spinning or twisting spindle without shock. i A

It is still another object of this invention to provide' a'spinning or twisting spindle with clutch means which requires relatively little space and which will automatically` be braked when thespinnin'g or twisting spindle is drivingly disconnected by means of the clutch pertaining thereto from the drive shaft for said spinning or twisting spindle.

These and other objects and advantages of the inven-` tion will appear more clearly from the following specification` in connection with the accompanying drawings, in which:

Fig..1`represents a longitudinal section through the drive ofa positively driven spinningor twisting spindle, providedV with a clutch` according tothe invention, said clutch being in its disconnected position.

AFig..2` is a section similar to that of the clutch, in thrown in position. l p

Fig. 3 is a diagrammatic cross-,sectional view illustrating-the operating mechanism for theclutch of Figs. 1 an d2,."` A t t Fig.;4 represents a longitudinal section through: another embodiment of the invention.

Fig 5l represents a longitudinal section through still i another embodiment of the invention.

Fig. 1 showing pled to each other.

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o Patented Mar. 3, 195e General arrangement According to the present invention, the driving part for the spindle is connected with the driven part thereof through a clutch which when thrown in rst establishes frictional driving `connection between said two parts and subsequently a positive driving connection between said parts. Such double acting clutch may be designed in various manner. Thus, for instance, such clutch may comprise a sleeve which is drivingly connected with the driving shaft while being displaceable in axial direction thereof. Said sleeve cooperates with a driven part which may either be an element of the drive itself or of the yarn carrier. The sleeve and the driven part are provided with frictional surfaces and with means adapted to act as positive coupling members. The said frictional surfaces and said last mentioned coupling members are arranged relative to each other in such a manner that when the clutch is thrown in, rst frictional connection between the elements to be coupled together will be eiected and subsequently positive driving connectionwill be established between said parts to be cou- When driving a plurality of spindles from a single driving shaft, the clutch aggregate is expediently so designed that it can be mounted as an entirety on the drive shaft by means of an adjustable end sleeve adapted to be ixedly connected. to the drive shaft. `To this end, for instance, the clutch sleeve may be mounted on a resiliently slotted sleeve adapted to` be clamped to the drive shaft and provided with an abutment. The arrangement may be such that said clutch sleeve is axially movable toward a. drive wheel rotatably mounted on the same, sleeve. The clutch members are `so designed that those surfaces thereof` which first engage each other when the clutch is thrown in form frictional surfaces of `such width that the yarn carrier is carried alongby frictional connection. Said frictional surfaces of both clutch members are followed by positive clutch members, for instance, `jaws which are adapted to engage each other with peripheral play. If desired, the `arrangement `may also be such that the driven part'may be provided with frictional and positive drive connecting elements and is displaceable toward av similarly designed clutch member which is rotatably connected to the driving part but is Vnot displaceableV thereon. p p The actuating member for the displaceable clutch part i may also operatively be connected with spindle braking means which, when disconnecting the clutch, will exert a braking" force upon theyarn carrier so as quickly to stopthe same. l

Structural arrangement prise helical wheels 3 arranged to mesh with the helical thread 5 at the lower end of the respective spindle 4 proper.

With this arrangement according to the invention, the drive wheel 3 `is freely rotatably mounted on a sleeve 6 which serves as carrier for the entire clutch aggregate so'that the latter can be mounted as an entirety upon lthe drive shaft 2. To this end the sleeve 6 is provided with slots 7 which allow a certain spring. One

end of the sleeve 6 `is provided witha ange 8 which geraet/3 Serres as abutment at .one .end of .the Sleeve, whereas the abutment at the other end Vof the sleeve is formed by an adjusting ring 9 by means of which the sleeve 6 can be clamped fast tothe driving'shaft 2. This arrangement allows a precise adjustment of all driving wheels 3 on the drive shaft 2 with regard to the"individual spindles 4 (one spindle only being shown).

' The drive wheel 3 is xedly connected to a bearing bushing 10 by means of la key 11 so that the wheel 3 cannot rotate on the bushing 10. On that side of Vthe drive wheel 3 which is remote from the adjusting ring 9, there is arranged a clutch sleeve 12 which is nonrotatably connected to the sleeve 6 by means of a key 13, but which is axially displaceable so that the clutch sleeve 12 will be carried along by shaft 2- when thevlatter Y i's' rotated.v

Thclutch sleeve 12 is so designed and arranged that it is'out of engagement'with the drive wheel 3 when its outer surface'ab'uts Ythe flange 8 of the sleeve v6.

`v In order lto bring about driving engagement Ybetween the clutch'sleeve `12 and the drive wheel 3 in the manner intended by the present invention, `the clutch sleeve 12 is according to the particular structure shownY in the drawing designed hollow, whereas the drive wheel is provided with an Vextension extending in the direction toward saidV clutch sleeve 12. Said extension is adapted to enter a corresponding recess in thel clutch sleeve -12 when 'the latterA is moved against the drive`wheel 3. f

The extension of the drive wheel 3 is formed lby rings 14, '15. The ring 14 represents a Spacer ring, whereas the ring 15 has its circumferential'surface provided with aY friction liner or isa frictional slotted ring which by means of the key 11 similar to the wheel 3 is prevented from rotating about the bushing 10. The rings 14,'15 are prevented from moving in axial direction by aspring ring (Seeger-ring) 16. The frictionall ring -15 is ex# pediently designed similar to a Seeger-inner ring which by means of different cross-sections'makes Vitpos'sibl'e whenr being compressed to allowV uniform deformation and thereby uniform pressing pressures.

InV the frontpportion of vthe recess 17 of the clutch sleeve 112 thereis provided an annular frictional surface 18. That portion of said frictional surface 18 which is adjacent the front edge of the sleeve 12 has a smaller diameter than the subsequent portion of said annular frictional surface or frictional member 18.' Said last mentioned portion of said frictional member 18 thus forms a'kind of annular groove asis clearly visible from Figs. 1 and 2. When the clutch is thrown in, the frietional vring 15 can snap into'said Yannular"groove as is clearlyV shown in Fig. 2. f

When the clutch is thrown in by moving the clutch sleeve 12 in the direction of the arrow d (Fig. 1), the parts 15' and 18 establish frictional driving connection. The positive driving connection is established by means of clutch teeth or clutch jaws 19 at the inner face of the sleeve 12 when said teeth or jaws 19 engage corresponding teeth or jaws 20 on the drive wheel 3. This will occur when the clutch sleeve 12 is moved in the direction of the arrow a until it abuts the drive wheel 3. The displacement or-shifting of ythe clutch sleeve 12 is effected by means of a fork v22 engaging the'groove 4`21 of the clutch sleeve 12. The fork 22 is adapted to be actuated by means of a tiltable lever 24 which is connected to the fork 22 bymeans of a pin 24a andan additional lever 23. The pin 24a is journalled in and guided b y a sleeve`24b mounted in the spindle rail 1. The shiftable lever A 24 maybe provided with an extension 2S extendingl .inthe vdirection .toward the respectiveA spinning or twisting spindle This extension 25 Vmay bedesigned as albraking member for frictionally engaging the spindle 4 when the lever 24 is tilted forwithdrawing the clutch Sleeve 1,2fr0m migliaia lliagsmentwth theslriYe-wheel 3Lifwhen @saving the clutch sleale .12 in the Question of the arrow b (Fig. 2).

From the above, itwill be ,evident that when throwing in the clutch sleeve 12, first the frictional surfaces or members 15 and 18 will frictionally engage each other, whereby the drive wheel 3 will be quickly but smoothly brought up to the speed ofthe Hdrive shaft 2. While the clutch sleeve 12 is being moved :further toward the drive shaft 3, the clutch teeth 19, -20 willengage each other without shock, particularly since they are arranged with peripheral play with `regard vrto each other, whereby a positive engagement and drive of the spindle 4 to be driven is assured. After the clutch sleeve 12 ha-s been completely .thrown in, the friction ring 15 springs into the annular groove 18a of the frictional member 18 ,connectedto the clutch sleeve 12, thereby preventing acci dental disengagement `of the clutch parts (Fig. 2).

It' the spinnin'gor twisting spindle is to be stopped, the clutch sleeve 12 is by means of the lever 24 shifted in .the d-ii'ectionlof the arrow b (Fig. 2) sothat first'the teeth 19 and 20 and only subsequently the frictional surfaces 15 and 18 disengage each other. Simultaneously with thisv operation, the spindle 4 is braked bythe braking memberY 25. Y

Fig. 4 illustrates a spindle 4a which through the intervention of a whorl 26 and a belt is driven in force-locked manner. The whorl 26 is shrunk upon the spindle 4a so as to be ixedly connected thereto or may in any other way be non-rotatably and non-displaceably mounted on said spindle shaft 4a. Above the whorl there is a yarn carrier 27 or bobbin loosely placed -upon the spindle shaft 4a in such a manner that it can rotate about shaft 4a, if desired, by means'ofv anti-friction bearings (not shown in the drawing). This yarn carrier 27V is also adapted to be moved in the direction of the double arrow c. The term yarn carrier. is to be understood generally to indicate any member or part of the spindle which receives the cop forming member such as aV yarn sleeve or bobbin or the yarn itself.

The whorl 26 is provided with a hub extending in the direction toward the yarn carrier 27. This hub carries frictional power conveying means, namely, the friction ring 28, and also 'carries positive power conveying means, namely, the teeth or jaws 29 which areV adapted to engage corresponding teeth or jaws 31 provided on the yarn carrier 27. The operation of the arrangement according to Fig. 4 is similar to thatv described in connection with Figs. l to 3. When the yarn carrier 27 is moved downwardly from the position shown in Fig. 4 by any convenient means, first the friction ring 28 frictionally engages the jaw-like elements 31 sothat the yarn carrier is smoothly brought up to the speed of the driving whorl 26. When the yarn carrier 27 is moved further downwardly, the teeth or jaws 29 engage the teeth or jaws 31 so that the yarn carrier 27 is now positively carried along by the whorl 26. The friction ring 28 then snaps into Ythe recess 30 and thus serves as safety holding devices for the clutch. In order to stop the yarn carrier, the yarn carrier is lifted, preferably by the same device by which it was lowered, whereupon the coupling or clutch parts will be disengaged from eaeh other in a manner inverse to that described above.

If it is not desired or not permitted to move the yarn carrier in' axial direction, .and there ,is no space in the drive for a clutch aggregate, the arrangement may b e modified as shown in Fig. 5.' In this instance, the spindle shaft 4b either driven positively by a screw wheel drive 2a, 3a, 5a, or in a force-locked manner by a whorl 26a (indicated in dash lines), is provided with a splined sectionr32 on which Va sleeve 33 is axially displaceable in the direction of the double arrow d. Above lsaid sleeve 33 there is arranged the yarn carrier 27 which is rotatable about the spindle shaft'4b but is not vaxially movable thereon. The sleeve 33 and yarn carrier 27v are proyidedwith frictional and positive engaging `elements 28 and 29', 31' respectively, which represent the coupling members rdesigned and operating in a manner It is, of course, understood that the present invention is not limited to the` particular constructions shown in the drawings, but also comprises any modiiications within the scope of the appended claims. Thus, instead of the clutch members described and illustrated,also any other type of suitable clutch members may be employed. For instance, conical clutch members, disc clutch members, or centrifugal friction clutches may take the place` of the friction rings described above. It is merely essential that first a synchronizing of the speeds of the driving and driven parts is effected by frictional connection before the positive driving connection is effected by means of which it is assured that the driven part is driven by the driving part at the speed of the latter. l

I claim: t ,n 1. In combination `in a textile machine: a spindle adapted to receive a yarn carrier, a drive shaft, first power conveying means arranged for driving connection with said drive shaft, second power conveying means carried by said spindle and arranged for driving connection with said first power conveying means', clutch members interposed between said drive shaft and said spindle for selectively establishing driving connection between said spindle and said drive shaft, said clutch members respectively comprising friction surface means arranged for frictional engagement withV each other` and also respectively including positive clutch means for positive coupling en'- gagement with each other,`said positive clutch means being arranged during a coupling process to become effective subsequent only to said friction surface means becoming effective, control means arranged for selectively bringing about movement of said clutch members toward each other or away from each other for respectively effecting or interrupting coupling engagement therebetween, and braking means associated with said spindle and operable in response to a relative movement of said clutch members away from each other to exert a braking force on .said spindle to thereby stop the same.

2. In combination in a textile machine: a spindle, a yarn carrier supported by said spindle, a drive shaft, power conveying means interposed between said drive shaft and said spindle for conveying driving power to the latter, and coupling members respectively carried by said spindle and said yarn carrier and movable selectively relative toward each other or away from each other for respectively effecting or interrupting a coupling engagement between said coupling members, said coupling members respectively comprising friction surface means arranged for frictional engagement with each other and also respectively comprising positive clutch means for positive coupling engagement with each other, said positive clutch means being arranged during the creation of said coupling engagement to become effective subsequent only to said friction surface means becoming effective.

3. In combination in a textile machine: a spindle, a yarn carrier supported by said spindle, means for preventing axial movement of said yarn carrier on said spindle, a drive shaft, power conveying means interposed between said drive shaft and said spindle for conveying driving power to the latter, a first clutch member carried by said yarn carrier and comprising iirst frictional surface means and first positive coupling means, a second clutch member rotatably connected to said spindle but movable thereon in the axial direction of said spindle, said second clutch member comprising second frictional surface means and second positive coupling means, said second clutch member being movable toward said yarn carrier to bring about first coupling engagement of said first and second frictional surface means and subsequently to bring about coupling engagement between` said rst and second positive coupling means.

4. YIn combination in a textile machine: a spindle for supporting a yarn carrier, a drive shaft, power conveying means for drivingly interconnecting saiddrive shaft and said spindle for conveying driving power to said spindle, said power conveying means including a gear substantially coaxial with and normally freely rotatable about said drive shaft, an annular clutch member surrounding said drive shaft and rotatably connected thereto, said clutch member being axially displaceable relative to said drive shaft and that end face of said clutch member which is ad-` jacent to said gear being provided with coupling teeth, said gear Ibeing provided with complementary coupling teeth for engagement with the coupling teeth of said clutch member, a first friction member rotatably connected to the inner surface of said annular clutch member, said friction member having a substantially cylindrical inner friction surface coaxial with said dn've shaft, a second friction member connected to said gear and having a cylindrical outer friction surface for frictional engagement with the inner friction surface of said annular clutch member, said second friction member and said rst friction member normally being offset to each other in axial `direction of said drive shaft, the coupling teeth of said clutch member normally being spaced from the complementary coupling teeth of said gear by a distance considerably greater than the normal spacing in axial directionbetween said first and second friction mem-` bers whereby said frictionmembers must frictionally er1-l gage each other prior; to the engagement of said coupling teeth of said clutch member with the complementary` coupling teeth of said gear.

, 5. `In combination in `a spindle driving mechanism for spinning and twisting machines: a shaft-like rotatable driving member, a driven member arranged coaxially with said driving member for selective driving connection therewith, a first clutch element rotatably connected to said driving member and axially displaceable thereon, said first clutch element being provided with coupling jaws, a second clutch element supported by said driven member and provided with recesses complementary to said coupling jaws for selectively receiving the same to effect a positive coupling between said driving member and said driven member, one of said clutch elements being provided with an annular frictional coupling member having a cylindrical outer frictional surface, and the other one of said clutch elements being provided with an inner cylindrical frictional surface for frictional engagement 'by said annular frictional coupling member, said clutch jaws and complementary clutch recesses and said frictional coupling element and cooperating frictional surface being oifset with regard to each other in the axial direction of said driving member so that said frictional coupling member and the cylindrical cooperating frictional surface are normally spaced from each other by a distance considerably less than the distance between said clutch jaws and the cooperating clutch recesses to thereby positively cause frictional engagement between said frictional coupling element and the cooperating frictional cylindrical surface prior to the engagement of said coupling recesses 'by said coupling jaws when said lirst clutch element is being moved toward said second clutch element.

6. In combination in a spindle driving mechanism for spinning and twisting machines: a spindle for supporting a yarn carrier, said spindle being provided with a driving thread, a drive shaft, a gear coaxial with said drive shaft and meshing with said driving thread, said gear being positively engaging said first clutch element and also being equipped with a cylindricalfrictionalinner surface for ttrictional engagement with said outer cylindrical frictional surfacehedis'tance Ibetween said frictionalcoupling member and said frictional inner surface in axial direction of said drives` vshaft normally being considerably less than the distance 'betweensaid first and secondclutch elements in axial direction of said drive shaft whereby said clutch elements can be positively engaged with each other only after preceding frictionaI engagement of said fritional inner surface with said( frictional outer surface, control lever means for displacing said second clutch element selectively toward or away from said rst clutch element, and'brake vmeans connected to said lever means for brakdsaid spindle'when said secondV clutch element is being withdrawn from said rst clutch element.

` 7. An arrangement according to 4claim 4, in which said first (friction member has sections of slightly different inner diameter nfor causing the section with smallest inner diameter to snap behind said second friction member when the coupling teeth of said annular clutch member positively engage Vs aid complementary coupling teeth;

-"8. An arrangement according to claim 5,which includes a sleeve rotatably connected to said driving member and carryingas an entirety said driven member, said second clutch element, and said frictional coupling member.

9. VVIn combination in a spindle driving mechanism for spinning and :twisting machines: a rotatable driving memlbena `driven member arranged coaxially with said'driving member for selective driving connection therewith, a first clutch element rotatably connected to said driving mein- 4ber and provided with coupling jaws, a second clutch element supported by said driven member and provided with recesses corresponding to Vsaid coupling jaws for selecy or away from each other for respectively effecting Ao r interruptng coupling engagement Vof said' clutch elements, one of 'said clutch elements being provided'with an Vannu-V lar frictional coupling kmember having a cylindrical outer frictional surface and ythe other one of said clutch elements being provided with an inner cylindrical frictional surface Afor frictional rengagement '-by said annular'frictional coupling member, said clutch jaws and cooperating clutch recesses and said -frictional coupling member and cooperating frictional surface being oiset with regard to' each other' -in axial direction of said driving member so thatV said'V frictional'` coupling member andthe cylindrical cooperating Africtional vsurface are normally spaced :fromeach other by a distance considera-bly .less ythan -thegdis-f tance between said clutchjaws andthe cooperating' clutch recesses to thereby positively cause frictional engagementl between said frictional coupling member and-"the"` cooperating frictional cylindrical surface prior to the engagement `of said coupling recessesby said couplingljawsf when said clutch elements are being moved relative toward each other;

Oct. 26, `19.354