US2571267A - Spinning spindle - Google Patents

Description

Oct. 16, 1951 T. H. LJUNGGREN SPINNING SPINDLE Filed Jan. 19, 1946 Patented Oct. 16, 1951 2,511,261 SPINNING SPINDLE Thor H. Idunggren, Charlestown, NJI., anignor,

by menne ents. to American Viscose Corporation, Wilmington, Dei., a corporation of Delaware Appumle'n Jennery is, 194s, serai No. 642.322

'3 Claims.

This invention relates to spindles for spinning machines, and has for an object to provide a spindle capable of operating at unusually high Speed- Still another object is to provide. improved centering devices for holding the blade in desired position at speeds lower than the critical speed and which will permit the blade to nd its own rotational center at'operating speed above the critical speed.

A furtherl object is to provide improved mounting for the spool on the blade by which the height of the spool may be adjusted as desired.

Further objects and advantages will appear from a description of the invention in connection with the accompanying drawings in which Figure l is a fragmentary top plan view of a spinning frame showing two spindles constructed in accordance with this invention.

Figure 2 is a sectional view to a larger scale on line '2-2 of Figure l.

Figures 3 and 4 are detail sectional views on lines 3-3 and 4 4, respectively, of 'Figure 2.

Figure 5 is a detail sectional view similar to a portion of Figure 2 and showing a flexible coupling of a modified form.

Referring to the drawings, i indicates a portion of a spinning frame, which as shown best in Figure 2, may be formed as an angle member. It may carry a plurality ofspindle' mechanisms spaced apart along its length, such mechanisms being indicated generally at 2. Each may be supported from the frame independently of the others by a three-point cushioning support. For

this purpose a casing I forming a part of each spindle mechanism is provided with three angularly spaced outwardly extending ears l. Through each of these ears extends a bolt 5 which secures the ear to 'a resilient mounting comprising a block 5 of cushioning material such as rubber which lies within an opening 'l through the frame support i, and is provided with a marginal washer 8 whichrests upon and is secured to the upper face ofthe support I. The bolt 5, as shown in Figure 2, passes downwardly through a central sleeve I0 extending through the block 5, there being positioned washers Ii and I2 a-bove and belowthe block at the ends of the sleeve Iii.

Each casing I forms support for a motor stator I5, and preferably this stator is that for a high frequency induction motor, since such motors are capable of .very high speeds by subjecting their windings to high frequency alternating currents, the higher the frequency, the higher the speed. Cooperating with the stator is a rotor I6 2 carried by a tubular arbor i1 which is arranged in substantially upright position and is shown as journaled in upper and lower ball bearings il and Il, which are shown as of the angular contact type adapted to take end thrust as well as radial load. The outer raceway 2l of the lower bearing I9 rests upon a ring Il supported by a pair of Belleville springs Il, which in turn, are supported on a ring 32 secured to the bottom face of the casing I. These Belleville springs 3l act on the bearings I5 and' I5 in a way w eliminate radial as well as axial looseness, at the same time give yieldable support in axial direction to compensate for diilerential linear heat expansion between the arbor and itssupportlng members. Bartending through the arbor i1 loosely is a blade 35. At the upper end ot the arbor Il, this blade 35 is connected to the arbor to be rotated thereby, as by a flexible coupling at Il. As shown in Figure 2, this coupling may comprise a horiz ontally flanged collar II carried by the blade 35, a collar I9 keyed for slight relative axial motion to the upper end of the arbor i1, and provided with atop flange ISU, these iianges presenting opposed spaced faces, and a ring l0 positioned between these faces and formed of yielding material such as rubber, and preferably a synthetic rubber, since such material is highly resistant to oil. This ring 40 is bonded to both of the collars 3l and I9. Lateral motion of the blade 35 with respect to the arbor i'l then stresses the yielding material ill in shear, this giving a soft action under comparatively large amplitude of displace-l ment due to thel'arge torsional and lateral vibrations te vbe expected. This yieldable coupling furnishes the sole driving connection between the' arbor i1 and the blade I5. The lower end of the' blade 35 which extends below the lower end of the arbor I1 and through the ring l2 is supported in a pair of opposed angular contact bearings 45. The balls of the bearings ride in annular grooves 46 in the'perimeter of the blade 35. The two bearings l5 are floating but areyieldably held centered as by a ring of rubber or other cushionlng material Il positioned between and bonded to the outer face o! a sleeve 410 enclosing the cuter bearing raceways and a sleeve I8 housed within a cap member l0 which is secured to the lower end of the casing l as by screws 5I. The sleeve 410. may have a anged cap ring "i threaded on its lower end, the ang'e of which supports a pair of Belleville springs 412 which bear benea the lower outer raceway and load the beari A.between the ilanges of the sleeves 410 and so that they support the blade rigidly amasar in axial as well as radial direction. The sleeve 48 may be adjusted by a collar 52 threaded into the interior of the cap 58 and held in position as' by a locking threaded collar 53 which may be tightened up against the ring 52, 'I'he lower end of the cap 50 is closed over by a ilanged end plate 54 having acentral perforated boss 55. Through this boss is slidable` a short shaft 56 having a head 51 at its lower end. This shaft 56 is keyed against rotation in the boss, as by the key 58, and is normally held partly outwardly projected from the -bcss 55 as by a coil spring 60. A cross pin 8i which may engage in a transverse slot 82 in an inward extension of the boss 55 acts to prevent undesired removal ofthe shaft 56. Its upper end is formed with a polygonal extension 63 which may be pressed upwardly into a matingly shaped socket 88 in the lower end of the blade 35 and when in this position locks the blade against rotation for a purpose which will later appear.

'I'he upper portion of the blade 35 is designed to carry a spool 1li provided with the usual large diameter lower ange 1i and the small diameter top flange 12. This spool is provided with spaced sockets 13 in its lower iiange within which may ride driving lugs 14 on a spool adapter 15. This spool adapter has a tubular portion 18 internally threaded at its upper end for the reception of a pair of straight threaded plugs 11 and 18. The lower plug 11 may rest upon or abut the upper end of the blade 35 so that turning of this plug 11 adjusts the height of the spool on the blade, and the upper plug 18 acts as a. lock nut to clamp the lower plug 11 in adjusted position. Both plugs may have tool-receiving sockets 19 to facilitate turning thereof.

In order that the rotation of the blade 35 may impart rotation to the spool adapter, and with it the spool, means are provided for clamping lthe upper portion of the blade to the spool adapter. To this end the upper end of the blade 35 is provided with a tapered internally threaded socket 88 within which may be engaged a tapered plug 8l and the upper end of the blade outwardly of the socket is split into segments, three such segments 82 being illustrated in Figure 3. By screwing the tapered plug 80 downwardly, these segments are spread apart and into clamping en gagement with the inner wall of the sleeve portion 16 of the spool adapter. 'Ihe tapered plug 8l may have a polygonal socket 83 in its upper end for the reception of a suitable tool which may be inserted through axial holes 84 and 85 through the straight plugs 11 and 18 and into engagement with the tapered plug 88. In order that this tapered plug may be turned relative to the blade 35, this blade may be held against rotation by engaging with its lower end the extension 63 of the shaft 58 which may be pressed upwardly by the operator for this purpose.

It will be noted that the entire driving connection between the motor rotor and the blade is through the exible coupling at the upper end of the arbor l1, and the blade has suilicient freedom of motion so that when it and the parts carried thereby are brought up to the desired rotational speed, this organization may normally center itself to rotate about its own center of gravity even though it may not coincide with the axial center of the blade 35. This is important because the yarn pack, including the spool, presents a rotating mass of variable nature. The .operation starts with an empty spool and builds up to the iinal size of the pack. This in itself gives rise to com- 75 action any oil which may escape upwardly .4 ponent forces eilectlng the balance, particularly because the load carrying part of the spindle is a rotating cantilever b'eam. Further component forces arise from the yarn stretch and from the impact when the yarn hits the pack. This impact is heavy, particularly with the heavy yarns now used in tire cord twisting, and is aggravated by increase in speed,l which is intended to be particularly high in the mechanism of this invention. There are a unbalanced forces caused by eccentric buildof the pack, some of which I are constant for each spool but diifer -from spool to spool and are due mainly to variations in looseness of t between the spool and adapter. and others of which are variable and due to obscure and intricate causes. While the yarn might be expected to be wound evenly and concentric on the spool, actually it is apt to form an elliptical v shape with the center of rotation in one of the focal points and it tends to continue to be built up in eccentric form thus increasing the state of unbalance.

In accordance with this invention, therefore, the blade and the parts carried thereby have considerable freedom for self-adjustment for proper rotation, but the cushioning element 41 gives a good damping action, when the blade is exposed to bending or lateral vibration being loaded on one side in tension and on`the .opposite side in compression, the rubber composition acting softer in tension than in compression. As shown in Figure 2, the clearance between the blade 35 and the arbor I1 is sufficiently large to take care of deflections of the blade under normal conditions, but the arbor acts as a snubber under abnormal conditions which otherwise would impart excessive lateral 'displacement to the blade. Adjustment of the sleeve 48 may be employed to place a shear load of adjustable amount on the element 41, and where both ilange elements of the iiexible coupling between the blade and arbor are iixed to their respective carrying parts as is shown in Figure 5, such adjustment of the sleeve 48 acts to adiust the blade axially relative to the arbor, thus to apply a tension or compression load on the iiexible element 48 of the coupling. This loading of the flexible element or elements has the eiect to tune the spindie and may be employed to advantage in adjusting it to the desired smooth running conditions which may vary, due, for example, to speed changes and changes of load from change ofsize of the yarn pack, the spool, and other conditions. One or both of the flexibleelements 40 and 41 may be electrically conductive.` 'This will have the effect of discharging static electricity from the yarn pack, allowing it to ow to the motor housing 3 which is grounded, as, for example, through the motor windings according to usual practice. If desired, the member 40 may be non conductive while the member 41 only is conductive, this causing the arbor bearings I8 and I9 to be by-passed during the discharge of such grounded static.

It is also important that no lubricating oll reach the strand which is being twisted and wound upon the spool. To this end the upper end of the casing 3 which is partly closed oi by a cover member 86 which carries the upper shaft bearing i8, supports a combined oil trap and guard 81, the upper end of which is inclined over toward the spindle, while beneath the coupling the arbor i1 has an outwardly projecting annular rib 88 which throws off by centrifugal from v the bearing Il into an annular collecting chamber 99 in the member I1 from which a duct 90 conducts the lubricant into the casing I and downwardly through a passage 9| into itslowcr portion from which it escapes into the cap 53 through a passage 92. A deilector ring 93 having a down-turned margin 94 surrounds the arbor I1 slightly above the lower bearing I9 and its rotation causes foreign particles reaching it to be deflected out into the lower portion of the casing 3. l v

From the foregoing description of certain embodiments of this invention, it should be eviresilient element between and bonded to said faces, a bearing assembly supporting the lower end of said blade, means for adusting the posident tothose skilled in the art that various changes and modifications might be made without departing from its spirit or scope.

I claim:

1. In combination, a support, a tubular arbor Journaled in said support, a blade extending vertically and freely through said arbor, a coupling between said blade and arbor comprising an element carried by and fixed to said blade, an element carried by and fixed to said arbor, said elements having spaced opposed faces,V a resilient element between andx bonded to said faces, a bearing assembly comprising vibration absorbing and damping means surrounding said bearing assembly supporting the lower end of said blade, and means for adjusting the position of said vibration absorbing and damping means of said bearing assembly relative to said coupling to thereby `adjustably load said resilient element.

2. In combination, a support, a tubular arbor lournaled in said support, a blade extending vertically and freely through said arbor, a coupling between said blade and arbor comprising an element carried by and fixed to said blade, an element carried by and fixed to said arbor, said elements having spaced opposed faces, a resilient element between and bonded to said faces, a bearing assembly supporting the lower end of said blade, means for adjusting the position of said bearing assembly relative to said coupling to thereby adjustabl'y load said resilient element, a

tion of said bearing assembly relative to said coupling to thereby adjustably load said resilient element, a spool adapter xed to the blade adjacent the upper end of the blade and a spool xed to the adapter.

THOR H. LJUNGGREN.

REFERE 'GES CITED The following references are of record in the fle of this patent: l

UNITED STATES PATENTS Number Name Date 1,554,299 Seibel Sept. 22,1925 1,699,583 Bronnert Jan. 22, 1929 1,899,159 Krotee Feb. 28, 1933 2,240,047 Marzoli Apr. 29, 1941 2,262,512 Musselman Nov. 11, 1941 2,290,421 FitzGerald July 21, 1942 2,277,835 Alben Mar. 3,1, 1942 2,303,912 Cole Dec. 1, 1942 2,353,462 1 Harkins July 11, 1944 2,387,260 Hargreaves et al. Oct. 23, 1945 FOREIGN PATENTS Number Country 'Date 265,129 Great Britain Sept. 1, 1927 '338,252 Great Britain Nov. 20, 1930 507,303 Germany June 12, 1926 566,289 Germany Dec. 14, 1932 628,588 France July 4, 1927

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