US2865574A - Core holder for winding machines - Google Patents

Description

Dec- 23, 1958 w. BLUMENTRlT-r 2,865,574

CORE HOLDER FOR WINDING MACHINES Filed Jan. 11. 1955 3 Sheets-Sheet l ATTORNEYS.

Dec. 23, 1958 w. BLUMENTRITTl 2,865,574

CORE HOLDER FOR WINDING MACHINES Filed Jan. 11, 1955 3 Sheets-Sheet 2 ATTORNEYS,

Dec. 23, 1958 w. BLUMENTRITT 2,865,574

CORE HOLDER FOR WINDING MACHINES Filed Jan. 11, 1955 5 Sheets-Sheet 3 INVENTOR www@ W Wm, MW +Qu,

ATTORNEYS.

bodies.

2,865,574 errar: noLiuEnFoR wnu)` rN'G MACHINE" s Werner Blumentritt, Zurich, Switzerland, assigner to Micail'A.-G., Zurich, Switzerland Y Application January 11,1955, seriatNo. 481,200 l Claims priority, application Switzerland `anuary 12, 1954 1e claims'. (c1. 242-4) This invention relates to a holder for ring bodies or 'cores which are to -be wound in winding machines, and more particularly to a holder for annular cores which af- ?fo'rds a uniform angular feed of the ring bodies with 'respect to a wire as it is wound upon the ring body.

Ak'n'own type-of holder in'use with ring winding machines has three columns offset by 120, the columns being driven by a common gear wheel and each provided with a core Vsupporting roller and a core driving roller. The columns are pivotable in relation to each other to lreceive annular cores of different size Aand are spring Spressed to'en'ga'ge their vdriving rollers against the core. The pivoting of the columns results in a decente'ring of the supported gco're during a `winding operationand this is a 'disadvantage when precision one-layer windings of resistance wires are to be applied to annular supporting The radius of the ring body is slightly increased bythe winding and, when a Wound portion of the ring body is engaged by a driving roller, there 'is a retarding of the feed action by that particular roller.

Objects of the present invention are to provide ring body holders of the automatic feed type which are free fromthe disadvantages of'the prior holders. Objects are to provide ring body/holders which include four uni- Aaxial length.

These and other objects and the advantages of the invention will ybe apparent from the following specification vwhen taken with the accompanying drawings in which:

Fig. l is a central vertical section through a ring body nited States Patent support embodying the invention, as seen on section line 1-1 of Fig. 2;

Fig. 2 is a bottom plan View of the same;

Fig. 3 is a bottom plan view of the holder as adjusted to support ring bodies of small radius;

Fig. 4 is a fragmentary vertical section through the same on line 4 4 of Fig. 3;

Figs. 5 and 6 are a central section and an elevation, respectively, on a larger scale, of the upper portion of one of the columns and showing different adjustments of the upper ring body support;

,Fig. 7 is Va plan view of a columnas show-n in Fig. 5.;

Figs. S and 9 are transverse sections on lines v8-'-8 and 9-,9, respectively, of Fig. 6; and

2,865,574 Patented Dec. 23, s

Figs.' 10v and 11 are diagrammatic plan views showing respectively a bar e ring body and a partially wound one in position on the holder.

VIn Figs. l-4, the reference numeral r1 identities the annular housing of a ring body support which has apertured ears 1' through which bolts may be passed to secure the housing to a base on which a windihgmachine is mounted. A plate 2'is secured across the upper-fend of the housing b'ore, the plate 2 having four guide slots 2a Vuniformly spaced at 90 in which slide blocks 3 carrying vertically extending shafts 4 are mounted for radial movement in a manner similar to thejaws of a rotary chuck, The lower end of each shaft 4 carries a bevel gear 5 in mesh with a bevel gear-6 supported -on the associated slide body 3 'and provided with a key, not shown, seating in the groove 7 of a shaft 8. The adjacent inner ends of the four shafts 8 have bevel gears 9 xed thereto and are journalled in bearing blocks 10 which are centered on the axis of plate 2 by a bearing `block 11 in which the hub 12 of a bevel drive gear 13 is journalled. For accuratealinement, the bearing blocks 10 are preferably formed by drilling an integral piece o`f metal which is then sawed into the individual blocks which are-secured to bearing blo'ck 11-by screws 14. The outer end of veach slide Vblock 3 hasa shaft 15 -journalled thereon: on an Vaxis parallel to the axis 'of housing land iguide iplateZ, the lower end of each shaft 1S having'an eccentric h'ead 16 which is slidably seated in the arcuate slot 17 of a lever 18 having one end hinged on the housing 1 by a pin119 and carrying a pin 20 at its other end which seats within a yoke 21 lixed to a ring 22 that is supported for angular adjustment on the wall of the annular housing 1. A bolt 23 is secured to ring 22 and extends through a slot 1a in the wall of housing 1 to permit adjustment of the levers 1S, and thereby of the slide blocks 3 from the exterior of the housing. vA jamb nut 24 is provided on bolt 23 for securing the ring 22 in any desired position of adjustment. Small adjustments of the individual blocks 3 to set all at the same radial distance from the axis of the holder are had Iby turning the shafts 15 to vary the orientation of their eccentric heads 16 in slots 17 of the levers 18. When once correctly adjusted, the 'shafts 15 are secured against inadvertent movement by set screws 15.

By movement o'f bolt 2 3 and ring 22 in the direction of arrow A, Fig. 2, the slide lblocks 3 may be adjusted `from their maximum spacing, as shown in Figs. l and 2, to minimum spacing as shown in Fig. 3.

The upper part of each slide block 3 is formed as a hollow flange or box 25 for a pin bearing 26 for-shaft 4, the bearing being retained in place by a cover 27 having a depending flange 28 which telescopes Within and is secured to the box 25 by screws 29. A gear 3) within the box 25 is keyed to shaft 4 and meshes with argear 31 on a laterally arranged shaft 32 which is journalled in the box and its cover, and has a medium hard rubber surfacing 33 of about two to three millimeters thickness constituting a drive roller for ring bodies of relatively small diameter. Each shaft 4 carries a secondvdrive roller for ring bodies R of larger diameter, each suc-h rollercomprising a facing 34 of medium hard rubberof about two to three millimeters thickness on a metal'sleeve 35 having inturned portions36 engaging in a longitudinal groove 37 of shaft 4 to key'the roller to the shaft. l*Sleeves 3S arelongitudinally split, as indicated at 35a.. in Fig. 8,

and resilient to maintain Ytheir position of adjustment along shafts 4 since it is preferable to have the drive roller surface 34 engage the central portion of the height of the ring bodies R which are to be wound, note Figs. 5 and 6 which illustrate ring bodies R of different height.

As previously stated, adjustment of shafts 1S permits the settlng of all shafts 4 at the same distance from the axis of the holder, and the drive rollers 33 and 34 are ground if necessary to keep `their diameters within small tolerances to insure an equal feed of the ring bodies by all drive rollers. Feed rollers 33`ar`e f somewhatl smaller diameter than feed'rollers 34, and the gears 30, 31 which drive the shafts 32 of the feed rollers are preferably so designed that both sets of feed rollers have the same circumferential speed.

The ring body R is seated between washers 38 which rest upon the covers 27 of boxes 25 and are rotatable with respect to shafts 4, and upper washers 39 rotatable on flanged bushings 40 which are adjustable on the shafts 4 Yto adapt the holder to support ring bodies R of different thicknesses or axial lengths, see Figs. l and 5. While the ring body R is shown in Fig. `l as seated on washers 38 within the feed rollers 34, it is apparent that larger diameter ring bodies may be supported on washers 38 to surround the feed rollers which will then contact the Vinner periphery of the ring body to feed the same an- -gularly as it is wound.

The Washers 39 are held against flanges 40' of the bushings 40 by knurled clamping sleeves 41 which, in turn,

are retained in place by split spring washers 42 which seat in circumferential grooves at the other ends of the bushyings 40. Each clamping sleeve 41 has an eccentric bore therein between upper and lower anges by which it is journalled on its 'associated sleeve 40, and one of the lflanges is provided with a recess 41a which permits the clamping sleeve to be assembled on a bushing 40 to enclose' a stud 43 having a fiat inner end for seating on the bottom of groove 37 of shaft 4 and a rounded outer end engaged by the inner wall of the eccentric bore of the clamping sleeve. As shown in Figs. 5 and 9, the'clamping sleeve 41 is imposition to force the stud 43V against shaft 4 to clamp bushing 40 to the shaft, thereby fixing the washer 39 at a desired distance from the lower washer 38. By turning the sleeve 41 on bushing 40, the clamping pressure may be relieved to permit adjustment of the bushing along shaft 4 and, by turning the sleeve 41 to aline the recess 41a with the stud'43, the bushing and sleeve assembly may be removed from shaft 4 and then re-assembled on the shaft in inverted position, as shown 'in Fig. 6, when ring bodies R of maximum thickness or axial length are to be wound.

The described holder is secured to the base carrying the winding machine with which it is to be used by screws or bolts, not shown, passed through the mounting ears '1'. The holder is so positioned that the hub 12 of drive gear 13 is centered on and engaged with a shaft, not shown, which rotates in synchronism with the winding machine.

In use of the holder, the slide blocks 3 are adjusted by manipulation of bolt 23 in accordance with the diameter of the ring body or core vto be wound and, in the case of relatively large diameter ring bodies R, the feed rollers 34 are adjusted on shafts 4to contact the middle portion of the height of the ring body. The core or ring body R is placed on the lower washers 38, as shown in Fig. l0, and the slide blocks 3 are -moved slightly inward to engage the drive rollers with the ring body. As the winding progresses, the shuttle S moves through the ring body to wrap on the wire W and the ring body is rotated by the feed rollers 34 as the wire is applied. When the wound portion of the ring body engages a feed roller 34, the wire W deforms the roller, as shown at X in Fig. ll,

rsincethe, shafts 4 are all substantially rigidly supported as the frictional forces established by the adjacent feed rollers. The decentering which results from the presence of the wire W is therefore negligibly small. Further, the winding plane of the shuttle S is at an angle of only to the decentering force and any decentering therefore has little effect upon the uniformity of the winding.

I claim:

l. A holder for simultaneously supporting and effecting rotation of ring bodies to be wound, said holder comprising a base having a vertical axis, four vertical slide blocks on said base and spaced uniformly about said vertical axis, each said slide block having a vertical bore therein, a rst vertical shaft individual to and rotatably mounted in each said block bore, a lirst feed roller secured to each said first shaft, a second vertical shaft individual to and supported by each said slide block, said second shafts being also uniformly spaced about said vertical axis and being located intermediate the latter and said first shafts, resilient material on each of said second shafts to constitute a second feed roller and which is spaced vertically from said first feed roller on the same slide block, drive gearing interconnecting each of said first shafts with the said second shaft correlated therewith, means for driving each of said first shafts and hence also said second shafts and said rst and second feed rollers, and means for elfccting simultaneous equal and radial adjustments of said slide `blocks in the' same sense with respect to said vertical axis thereby to position all of said first rollers and all of said second rollers aty the same radial distances respectively from said verticalaxis in any given position of radial adjustment.

2. A holder as recited in claim l, wherein said second feed rollers constituted by the resilient material on said second shafts are of less diameter than said lirst feed rollers on said lirst shafts, and the ratio of said drive gear- -ing is such that all feed rollers'are driven at theA same ling radially outward from said. vertical axis, means supporting said slide blocks in said slots respectively for longitudinalmovement along said slots, a lever individual to each said slide block disposed within and pivoted on said base, means coupling each said slide block when the said lever correlated therewith, and means movable with respect to said base to effect simultaneous movement of said levers and slide blocks.

4. A holder as recited in'claim 3 wherein said base is annular and is provided with a slot through the wall thereof, and said movable means comprises aring slidable angularly on said annular base, and 'a bolt secured to said base and extending through 'said slot of the annular base.

5. A' holder as recited in claim 4, wherein said bolt is threaded, in combination with a jamb nut on said bolt for clamping said ring in any desired position of adjustment, whereby said slide blocks and` the shafts carried thereby may be retained in desired positions of adjustment. Y

6. A holder as recited in claim 3, wherein said means coupling said slide blocks to said levers includes means for individually adjusting each slide block radially with respect to its associated lever.

7. A holder as recited in claim l, in combination with washers rotatable on each of said iirst shafts and located above and below said rst feed rollers for the support of a ring body to be wound.

8. A holder as recited in claim 7, in combination with meanssupporting those washers which are above the said first feed rollers for vertical adjustment along said first shafts.

9. A holder as recited in claim 3 and wherein the 5 5 means for simultaneously rotating said first shafts com- References Cited in the file of this patent prises a drive shaft individual to each of said slide blocks, UNITED STATES PATENTS a rst gear at the lower end of each said rst shaft, and

a second gear meshed with said rst gear, said second 1752489 longedyk Apr' 1 1930 gear being mounted on said drive shaft for rotation 5 1879882 Puuets Sept' 27 1932 thereby and sliding movement therealong as said slide 1957068 Kalman May l 1934 block is shifted radially, and said drive shaft being re- 2249506 Veince July 15 1941 ceived telescopically within said slide block as the latter is 2'467'643 Wirth ""v" Apr' '19' 1949 shifted radially inward' 2,721,708 Rogers Oct. 25, 1955 10. A holder as recited in claim 9 wherein the inner 10 2793817 Clarke May 28 1957 end of each said drive shaft includes a gear thereon to FOREIGN PATENTS drive the same and said drive gears are meshed with a 50,858 Germany Feb. 147, 1890 common gear supported by and coaxial with the vertical 2,297 Great Britain Jan. 30, 19.12.* axis of said base. of 1911

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