US2712836A - Coil winding machine - Google Patents

Description

July 12, 1955 R. G. MARZOLF 2,712,836

COIL WINDING MACHINE Filed July 24, 1951 8 Sheets-Sheet 1 IN V EN TOR.

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July 12, 1955 R. G. MARZOLF 2,712,836

COIL WINDING MACHINE Filed July 24, 1951 8 Sheets-Sheet 8 United States Patent COIL WINDING MACHINE Robert G. Marzolf, Snyder, N. Y. Application July 24, 1951, Serial No. 238,311 12 Claims. (Cl. 140-921) This invention relates to coil-winding machines, particularly adapted for use in the winding of coils for electrical motors, although not limited to such use.

It is an object of this invention to provide improved arrangements for starting the winding of the coils, completing such winding, and removing the finished coils from the machine, with a minimum of labor.

It is a further object of this invention -to provide an improved machine for winding stringsof connected coils, each coil of which may consist of two or more electrically separate windings, in order to facilitate mounting of such coils in motor frames, and to minimize the time and labor required for their connection, and reduce the possibility of incorrect connection.

It is still a further object of this invention to provide a machine of the class described which is relatively simple and economical to construct, and which requires little maintenance.

The features of novelty which I believe to be characteristic of my invention are set forth with particularity in the appended claims. My invention itself, however, both as to its fundamental principles and as to its particular and preferred embodiments, will best be understood by reference to the specifications and accompanying drawing, in which,

Fig. l is a side elevation of a machine in accordance with one embodiment of my invention;

Fig. 2 is a top plan view thereof;

Fig. 3 is a diagrammatic illustration of a string of connected coils, each with two windings, as made on the machine;

Fig. 4 is a section on lines 4-4 of Fig. 2;

Fig. 5 is a sectiOnon lines 5-5 of Fig. 4;

Fig.6 is a detail view, partly in section, of a wire thrower or flyer employed in the machine;

. Fig.v 7 is a view on lines 7-7 of Fig. 6;

Fig. 8 is a view on lines ,8-8 of Fig. 6;

Fig. 9 is a perspective view of the rear coil form;

Fig. 1G is a similar view of the front coil form;

Fig. 11 is a section on lines 11-11 of Fig. 2;

Fig. 12 is a section on lines 12-12 of Fig. 11;

Fig. 13 is a section on lines 13-13 of Fig. 12;

Fig. 4 is a section on lines 14-14 of Fig. 2; v

Fig. 15 is a section on lines 15-15 of Fig..l4;

Fig. 16 is a perspective view of a'finished coil; J

Fig. 17 is a top plan view of a modified form of my invention; s

Fig. l8,is a. section on lines 18-18 of Fig. 17;

Fig. 19 is a section on lines 19-19 of Fig. 20;

Fig. 20 is a section on lines 20-20 of Fig. 19;

Fig. 21 is a detail section showing a completed coil in position;

Fig. 22 is a similar view showing removal of the coil, and

Fig. 23 is a section on lines 23-23 of Fig. 22.

Referring first to the embodiment of th invention shown in Figs. l-16, the machine comprises a base 11, from which rises pedestal 12, carrying table 13. Mounted 2,712,835 Patented July 12, 1955 on the table for indexing rotation about a vertical axis is turret 14, in this instance arranged to carry eight coil forms 15 mounted on the periphery of the turret, each with its axis horizontal. Secured to the turret for producing indexing, or step-by-step rotation, is the turret drive lever 16. In the embodiment shown, this is manually operated, but other mechanisms, well known in the art, power driven, if desired, may be employed to index the turret.

As many winding stations may be provided as there are desired separate windings on each coil. In this instance, I have shown two, 18 and 20, one being a duplicate of the other, so that only one need be described in detail. Mounted below the table is the motor 22, driving the winder at station 18 through belt 24, for example. Motor 22 is started and stopped, and its speed controlled, by rheostat 26 which may be mounted on the side of pedestal 12 in position to be operated by the knee of the operator at are therefore not described in detail.

Wire 28 is fed from spool 39 in container 32, passes up through an opening 34 in base plate 36 of bracket 33 mounted on table extension 13a and over pulley 40 mounted at the upper end of said bracket. Preferably two turns of wires are taken over pulley 40, and the wire then passes axially down the hollow center 44 of the flyer or winder shaft 42 mounted in hearings in housing 46. The forward end of shaft 42 carries chuck 48 which has an off-center opening to receive arm 50a of flier or winding arm 50 extending diagonally outward and toward turret 14 (see Fig. 6). Flier arm 50a is retained in chuck 48 by any suitable means, such as set screws 48a. Winding arm 50 also carries feed arms 50b, 56c, and 50d, each having a pulley, 50e, 50], and Stig, over which the wire passes in turn (Fig. 6). As the winding arm 50 rotates, carried by shaft 42, driven in turn by pulley 25 secured thereto, and driven by belt 24 from motor 22, the outer end of arm 50 moves in a circular path aroundcoil form 15, and (the end of wire'28 being attached) the wire 28 is wound about the coil form. v

The coil form 15, in this embodiment of the inven-' tion, comprises a pair of H plates, back plate 15a, and cooperating front plate 15b. The legs of the H of back plate 15a may have counterbored openings 15c by whichplate 15a may be secured to turret 14 by suitable bolts 15a, and back plate may have a central boss 15e, rectangular in shape (for rectangular coils) tapered and polished to facilitate removal of the finished coil. The face of boss 15a may have squared stud 52 and clamp boss 54 to receive andhold front plate 15b, with a sliding fit, and both front and rear plates are provided with'registering tape-receiving slots 15 and front plate 15b has also stud receiving slot 15 to permit sliding front plate 151; vertically downwardly on stud 52. In preparation for winding a coil, adhesive tape strip 56 and 58 may be laid in slots 15 with their ends temporarily pressed on turret 14 and clamp boss 54 (see Fig. 6). After completion of the coil winding, the projecting ends of tape strips 56 and 58 are wound around the respectiveportions-of the coil and pressed down, to secure the coil (see Figs. 15 and 16). .'Front plate 15b may then be lifted off and the coil removed from the form. This action, however, ordinarily does not occur until the turret has indexed the coil to position 6,- where the ejector mechanism is mounted.

Turn counter 60 is suitably geared to flyer shaft 42, to show the number of turns applied in Winding.

To provide for level winding, the entire flyer assembly is mounted for sliding movement axially toward and away from coil form 15, as shown by the arrows in Fig. 1.

station 18. Such rheostats and. their construction and connection are well known and 62,.closed by retaining screw 1 62 while permitting it to For this purpose, base block 62 has an opening 63 to receive feed lever 6d (Figs. 2, 4 and pivoted on pin 65 for swinging movement in a horizontal plane, and urged in a counter-clockwise direction by plunger 66 riding on spring 67 in receiving opening 68 in base block 69. Base block 62 has a wide, shallow groove 71 to receive flange plate 72 secured to the base of fiyer carrier housing 46, in which flyer shaft 42 is journalled, and retainer plates 73 are secured to base block 62 on opposite sides and serve to retain flange plate 72 and flier carrier 46 on base block slide axially. Pin 74, mounted in fiyer carrier 46, extends downwardly through flange plate 71 and the upper part of base block 62, and through longitudinal slot 64a in feed lever 64 and terminates in a slot (not shown) in the lower portion of base block 62.

From the foregoing, it will be understood that as the feed lever is swung back and forth, pivoting on pin 65, .pin 74 in slot 64a is moved back and forth path, carrying with it the flyer carrier and flier, distributing the wire of the winding in a level manner. It will be understood that any well known automatic feed mech anism may be employed for the purpose, instead of the manual means shown, but for simplicity and economy of machine construction and maintenance, I prefer the manual mechanism shown. The machine operator finds it a simple matter to work the feed lever as the coil is I being wound. A second winding mechanism, like that already described, is shown at index station 3, and, if used, 27

is manned by another operator. The manner of use of the two winding mechanisms will now be described.

As the winding at station 1 is completed, the operator stops motor 22, preparatory to indexing the turret one step, performs the indexing operation, bringing an empty I and taped coil form to flyer 50, and the next coil .is started by starting the motor. No break has been made in the who, so the last turn on the first coil leads to the first turn of the next coil. On completion of the first winding of the second coil, the motor at station 1 is again stopped, the turret indexed, and the third coil started. The second indexing has now carried the first coil to station 3, and the operator at this station puts on the second winding, surrounding the first winding. The

indexing continues until coils reach station 6, where they are ejected. This method of winding the coils is diagrammatically sho'wn in Fig. 3.

To facilitate ejection, ejector lever is provided, pivoted at 81 in bracket 82 mounted under the table 13,

and has'pusher head 83, engaging and raising ejector w plunger 84 carried in opening in table 13 and the ejector housing consisting of lower front plate 85, rear plate '88, and upper front plates 86 and 87, the housing forming a vertical track for plunger 84 and rectangular ejector plate 89 carried by the plunger.

As the turret indexes a coil to station 6, the top of ejector plate 89 lies directly under front coil form plate 15b. The operator at this station pushes down on ejector lever 80, and plate 39 engages and pushes up front coil form 15b to clear boss 54, as shown in Figs. 14 and 15, whereupon the operator may lift it oft, and then restores lever, 89 to initial position, dropping plate 89 out of the way, 'soTthat the coil can be removed from back coil form 154. The operator then replaces front form 151;, applies thetape strips to the for-in as already mentioned, and the form is ready to receive another "winding.

The turret 14 is mounted on turret shaft 90 (and may beshrunk on) within hollow column 91, and its weight is carried on thrust bearings 92 riding in grooves 92a onlthe under side of turret 14 and the upper surface of column 91. Bearings 94 and 95 may -also be provided, fitting correspondingly shaped recesses at the upper and lower ends of column 91, which may be secured to table 13 by bolts 93.

V Shaft 90 has a downwardly projecting pot-tion 90a of in a linear reduced diameter, and a still further reduced end portion 90b, carrying retaining collar 96 held by set screw 96a. Bearings 102 may surround shaft portion 90a within table 13. Below bearings 102 I provide flanged drive collar 98, pinned to shaft 90a by pin 101, having a series of index notches 93a around the periphery of the collar flange 9812. Above flange 98b I provide a stationary collar 99, bolted to the table, and having one indexing notch only, as at 99a. Below collar 98 there is provided a bearing 93c and rotatable on bearing 980 the turret drive lever 97, arranged to swing back and forth in a'short are as in Fig. 12.

The outer end of lever 16 carries a vertically extending hollow handle 1'03, and within handle 103 there is release rod 104, carrying at its upper end release but ton 105.

The lower end of rod 104 bears on bell crank lever 106 pivoted at 107 and connected to arm 108, pivoted at its forward end at 112 to latch 109, sliding between guides and having vertical extension 111. The latch is urged into the indexing notch 98a by spring 113 bearing against stop 114. Rotation of the turret in one direction only is permitted by pawl 118 riding in index notches 98a, pivoted at 119, and spring pressed into notches 93:: by spring 120 fulc'rumed on pin 121.

To index the turret, the operator takes handle 103, presses the release button 105, and swings lever 76 counter-clockwise as in Fig. 12 until latch 109 engages the next indexing notch. Returning the lever to initial position will now rotate the turret to the next indexed position. It will be seen from Fig. 13, that latch 109 does not go all the way into notch 9%, being stopped by engagement of the forward side of vertical extension 111 the turret in position.

with the outer surface of collar 99. When the turret reaches the index position, the upper extension 111 registers with index notch 99:: in stationary collar 99, and the latch then moves all the way forward, locking Excessive movement of lever 16 is prevented by the configuration of theedge of the table, as will be seen from Fig. 2.

To count the coils, suitable counting mechanism 122 may be provided, having counteractuating arm 123 engaged and moved by pins 124, one for each coil form.

cit

The space between coil forms may be covered by downwardly and inwardly projecting shields 125.

In the operation of the embodiment of the machine so far described, four persons are employed; two winders, one taper, and one demounter.

In the embodiment of the invention shown in Figs. l7-23, table 13 is provided with a rotor or coil form wheel 201, mounted for rotation on a horizontal axis on pedestal 251. The wheel is removable in a manner to be described, and to reduce its weight is provided with a multiplicity of triangular cut-outs 203 and radial slots 204, and carries a number of coil forms 202, symmetrically mountedaround the axis. in the embodiment herein described, eight forms are shown, but a larger or smaller number may be provided.

Indexing holes 205 may be formed for locking the wheel 2d} at each indexing position, and wire winding coil for-tn wheel is made movable toward and-away from the winding mechanism, in a manner to be described.

A pin 208 is provided near the periphery of wheel 201 near one coil form, to which the end of the wire may be fastened when starting to wind coils, and a number of grooved pins 209, one for each coil form, are positioned symmetrically around wheel 201 radially inward from the coil forms and "between them to receive and support the wire where it passes from one coil to the next, as will be seen from Fig. 18.

Each form may be made u of 'a generally til-shaped emasaa back plate 211, secured to wheel 201 by bolts 212a (Fig. 18), carrying a projecting central tapered stud 212, terminating in threaded portion 213 to receive clamp nut 214. The front coil form plate 215 is likewise generally H-shaped and is made up of two portions 216 and 217, having inwardly projecting central portions 218 and 219, having central tapered hole 220 to fit stud 212. The two portions 216 and 217 are secured together in any suitable manner, as by bolts 221. To assure assembly of the front and back plates in correct position, the back plate may carry locating pin 222, fitting into the space between the two halves of the front plate (see Fig. 18). When the front plate is removed from the back plate, the two halves may be pressed into contact, as in Fig. 23. To assure the clearance space between the two halves of the front plate when bolted together, the bolt holes may be stopped so that the bolts cannot bring the two halves into contact.

The coil form wheel is arranged to be quickly demounted from the machine when desired, usually after all of the coil forms have been wound. For this purpose, a hollow central hub 230 is secured to wheel 201, as by rivets 232 engaging the wheel and circular flange 231 carried by hub 230. Hub 230 also has a smaller circular flange 233, bevelled at 45 on its back-side, fitting a registering groove 233a in the bearings 234 and 235. The lower half bearing 234 is stationary, while the upper half bearing 235 is pivoted as at 236 for swinging movement, to open position, shown in dotted lines in Fig. 20, and is releasably held in closed position by latch 240 having hook 241 engaging keeper 241a on lower bearing 234. Latch 240 is pivotally mounted at 242 between ears 243 carried on upper bearing 235, and is spring pressed in a clockwise direction by spring 244.

For level winding, the form wheel may be shifted axially, by feed lever 250 pivoted on pedestal 251 mounted on table 13 and connected to sliding shaft 252 which is pinned by pin 253 to butt plate 254. The lower half bearing 234 is securely mounted by any suitable fastening means to the butt plate 254 and the spring 255 urges butt plate 254 and bearings 234 and 235 to the left as in Figs. 17 and 19. By pressing more or less on lever 250 the form wheel 201 is moved axially to distribute the winding turns axially as desired.

Looking at indexed positions is accomplished by index pin 260 passing through indexing holes 205 in wheel 201, flange 231, lower bearing 234, and butt plate 254, having enlarged head 261 engaged on its front side by bifurcated lever 262 pivoted at 263 on cars 264 of butt plate 254. Pin 260 is biased to locking position by spring 265 surrounding pin 260 in an opening in lower bearing 234, and engaging, at one end, butt plate 254, and at the other, pin 266 in index pin 260.

To wind coils having more than one winding, a plurality of winding stations may be provided as shown in Figs. 1-16, but this is not necessary, be applied during one rotation of the coil form wheel, and a second winding on top of the first during a second rotation, a third during a third rotation, and so on. If the wire is not broken or cut, all windings are in series, with only two ends of wire. With the machine of Figs. 1-16, on the other hand, all first windings are in series, with four ends of wire.

In the foregoing specification I have explained the principles of my invention and the best mode in which I have contemplated applying those principles, so as to distinguish my invention from other inventions; and I have particularly pointed out and distinctly claimed the part, improvement, or combination which I claim as my invention or discovery.

While I have shown and described certain preferred embodiments of my invention, it will be understood that modifications and changes may be made without departing from the spirit and scope thereof, as will be clear to those skilled in the art.

as one winding may and ejector means spaced a first one of said stop positions and in winding registry with successive ones of said coil forms as said forms are successively rotated to said first stop position, and an ejector mechanism positioned adjacent a second one of said stop positions, said ejector mechanism comprising an ejector plate positioned to be coplanar with each of said retaining plates as said forms are successively rotated to said second stop position, and means for selectively moving said ejection plate into forcible contact with successive ones of said retaining plates at said second stop position.

2. In a coil winding machine, a base, a rotor mounted thereon for step by step rotation to a plurality of stop positions, coil forms mounted around the periphery of said rotor with their axes extending horizontally, said forms each comprising a back plate aflixed to said rotor and a front plate removable from said coil form by sliding movement perpendicular to the coil form axis, a winding mechanism positioned adjacent a first one of said stop positions and in winding registry with successive of said coil forms at said first stop position, and an ejector mechanism adjacent a second of said stop positions, said ejector mechanism including a member selectively movable into forcible engagement with each of said front plates as each of said coil forms are successively moved to said second stop position thereby selectively to slide each of said front plates in a direction perpendicular to its respective coil form axis.

3. The combination claimed in claim 2 in which said front plate is removable by vertical movement, the said movable member of said ejector mechanism being mounted for vertical movement.

4. The combination of claim 2 in which said winding mechanism comprises a flier arm selectively rotatable about each of said coil forms at said first stop position in succession, and means for reciprocating said flier arm with respect to the longitudinal axis of a coil form at said first stop position to level-Wind each coil at said stop position.

5. The combination of claim 2 including a further winding mechanism adjacent a third one of said stop posi tions, whereby plural coils may be wound upon a given coil form by moving said form from said first to said third stop positions.

6. In a coil winding machine, a rotor mounted thereon for step by step rotation, coil forms mounted on said rotor, a first winding mechanism positioned in winding registry with a coil form for stop positions of said rotor. a second winding mechanism operable independently of said first winding mechanism and positioned in winding registry with another coil form for stop positions of said rotor, said coil forms each comprising a back plate affixed to said rotor and a front plate detachable from said coil form by sliding movement in a predetermined direction perpendicular to the longitudinal axis of the coil form, from both said first and second winding mechanisms and adjacent said rotor, said ejector means including a force transmitting member selectively moveable into engagement with the front plate of each of said coils after said coils have passed said second winding mechanism, and means for moving said force transmitting member in said predetermined direction thereby to detach the front plate from each of said coil forms successively after winding thereon has been terminated.

7. In a coil winding machine, a supporting structure, a rotary member rotatably mounted on said supporting structure, a plurality of coil forms mounted on said rotary member, means for indexing said rotary member and the coil fo'rrns thereon in a step by step motion to a plurality of stop positions, a first winding mechanism mounted on said supporting structure adjacent one of said stop positions and in winding registry with each of said coil forms in succession, and a second winding mechanism operable independently of said first winding mechanism, said second winding rnechan'isrn being mounted on said supporting structure adjacent a further stop position of said rotor and coil forms.

8. The combination of claim 7 in which said rotary member has a substantially vertical axis of rotation with respect to said supporting structure, said coil forms being mounted on said rotary member with their aXes horizontal, each of said winding mechanisms comprising a flier arm for feeding Wire, means for rotating said flier arm around the horizontal axes of said coil forms, and means for reciprocating said flier arm in a direction sub stantially parallel to the horizontal axes of said coil forms.

9. The combination or" claim 7 in which said coil forms each include a coil retaining plate selectively detachable by sliding movement in a predetermined direction perpendicular to the coil form axis, and ejector means mounted on said supporting structure adjacent a still further of said stop positions, said ejector means including a force transm'itting member selectively movable in said predetermined 7 direction to engage selectively each of said retaining plates at said further stop position.

10. A form for Winding coils comprising a first retaining flange, an elongated central projection aiiixed to said first flange and substantially perpendicular thereto, said central projection having a squared stud afiixed thereto at the terminus thereof removed from said first flange, and

a second retaining flange substantially parallel to said first flange, said second flange defining an open ended rectangular slot near the center thereof and so dimensioned as to slide on said squared stud only in a direction sub stantially perpendicular to the longitudinal axis of said central projection.

ll. The coil form of claim 10 in which said central projection defines an elongated depress-ion substantially parallel to the longitudinal axis of said central projection for the reception of a tape strip. 7

12. The form of claim 11 in which each of said first and second retaining flanges are shaped in the form of an H, the legs of said H-shaped flanges being substantially parallel to one another, said central projection being substantially rectangular in cross section and said elongated depression comprising a pair of recesses opposingly disposed along said central projection and between the legs of each H, whereby a pair of tape strips may be respectively placed in said recesses and each of said tape strips may extend past said retaining flanges between the legs thereof.

References Cited in, the file of this patent UNITED STATES PATENTS

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