US3822830A

US3822830A - Stator core winding machine

Info

Publication number: US3822830A
Application number: US00239569A
Authority: US
Inventors: R Peters
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-03-30
Filing date: 1972-03-30
Publication date: 1974-07-09
Anticipated expiration: 1991-07-09
Also published as: JPS5649067B2; GB1378100A; IT980055B; JPS498701A; DE2316078A1

Abstract

A winding head assembly for a stator core winding machine having a turn table for supporting a number of stator cores and tooling rings for rotating the stator core relative to the turn table, the tooling rings including pivotably mounted fingers positioned between the slots in the stator core, the winding head assembly including a winding head and a spindle drive mechanism, the winding head being supported by the spindle drive mechanism for reciprocating and oscillating movement through the center of the stator core, the winding head includes a needle positioned to move through the slots of the stator core and a cam mounted for movement with and relative to the winding head a distance different than the distance of movement of the winding head, the cam being operatively connected to the needle to move the needle transversely of the winding head through an arcuate path in its movement through the slots of the stator core, the spindle drive mechanism including a dual coaxially mounted spindle, one of the spindles being connected to the winding head and the other connected to the cam, and an offset cam block for simultaneously moving said spindles through strokes of different lengths.

Description

1 ited States Patent [191 Peters STATOR CORE WINDING MACHINE [76] Inventor: Robert W. Peters, 9036 N. 75th,

- Milwaukee, Wis. 53223 [22] Filed: Mar. 30, 1972 [21] Appl. No.: 239,569

[52] US. Cl. 242/1.l R, 74/23 Primary Examiner-Billy S. Taylor Attorney, Agent, or Firm-James E. Nilles 57 ABSTRACT A winding head assembly for a stator core winding machine having a turn table for supporting a number core relative to the turn table, the tooling rings including pivotably mounted fingers positioned between the slots in the stator core, the winding head assembly in cluding a winding head and a spindle drive mechanism, the winding head being supported by the spindle drive mechanism for reciprocating and oscillating movement through the center of the stator core, the winding head includes a needle positioned to move through the slots of the stator core and a cam mounted for movement with and relative to the winding head a distance different than the distance of movement of the winding head, the cam being operatively connected to the needle to move the needle transversely of the winding head through an arcuate path in its movement through the slots of the stator core, the spindle drive mechanism including a dual coaxially mounted spindle, one of the spindles being connected to the winding head and the other connected to the cam, and an offset cam block for simultaneously moving said spindles through strokes of different lengths.

12 Claims, 9 Drawing Figures PATENTEELM 9am sum 2 or a warm PATENTEU-l l 91w 3,822,830

SHEU 3 [IF 4 FIG. 9

' lowing detailed description when readin with the accompanying drawings.

head. I p FIG-4 is an enlarged view in section showing the the intermeditate position inthe stator sembly. I

chines generallyinclude a complicated mechanical systern for displacing the wire in order to achieve accuracy in the wire displacement. Such a system is shown in my earlier issued Pat. No. 3,323,734, entitled.,Stator Core Winding Machine issued on June 6, 1967.

SUMMARY OF THE INVENTION The stator core winding machine'of this invention is provided with an improved winding head assembly for achieving accurate wire displacement on each side of thestator core. The winding head isprovided with a movable needle whichis moved transversely to the directioni'of motion .of the winding head. A cam is mounted in'the'winding head for-movement relative to the needle during the reciprocat'ory movement of the winding head to produce transverse movement of the needle. The-needle is moved through anarcuate path to displace thev wire at the end of each stroke of the windinghead; novel dual spindle mechanism isused to :provide "simultaneous reciprocatory and relative movement between the winding head and the cam.

. 2 indexed to move a v to the different stations. i D r I The stator core 18 when moved to the winding station is clamped between a pair of tooling rings and 22 having fingers 24 and26 respectively. ,The'

fingers

24 and 26 are pivotallymounte'd on the corresponding tooling ring and operate to hold the wire. for the coils as the wire is looped through the stator slots by the .winding head'assembly as disclosed in my Pat. No.

3,323,734, entitled Stator Core- Winding Machine, and issuedon June 6,1967. The

tooling rings

20 and 22 are adapted to be rotated by meansof a drive assem bly to rotate a stator core 18 clamped therebetween with respect to theiturn table as the coils are completed in the slots'of the stator core. The presentinvention is concerned-primarily with the winding head assembly 15 and therefore no further description is considered necessary for the operation of the loading, coil wedging, coil-forming and unloading stations. The Winding Head Assembl'yj 1' In accordance wIth the present invention, the'stator cores 18 are wound by means of the winding head assembly 15 which I is 1 reciprocated through the stator.

core 18 oscillated near or at the end of each recipr rocation stroke; v The Jstator 'core l8 as seen partly in FIG. 3 is Jprovided with' a number of equallysp'aced v slots 28' located-at l0 interv als. Coils are formed in Other advantages will become apparent from the folconnection A S, I FIG. 1' is a perspective view of the stator core winding machine showing the winding head-in an intermediate positionin the stator core. a r "FIGL'Z is an elevational viewin section showing the spindledrive arrangement for the winding head. f FIG. 3 is'a top view of the stator core and thewinding windinghead Core-9 v I 'FIG. 5 is a topview of the needle.

FIG. 6 is a front view' of the spindle drive assembly.

FIG. 7 is a'front view "of the drive plate, FIG. 8 is a perspective viewof the offset drive block.

FIG.'9 is a front elevation view of the oscillating as- DESCRIPTION oF THE INVENTION 4 A complete stator core 'winding'machine 10 of the type contemplated herein generally includes a turn table 12 mounted for rotary motion on a frame 14 and a winding headas'sembly 15 mounted for reciprocating and'oscillating movement relative 'tothe frame 14. The turn table 12 includes a number of supporting rings 16 vanisrn 55.

the stator core 18byl oopingwires-32through theslots 28-and around the fingers 24 and The wir es 3 2 are wrapped'or coiled through the slots 28-by means of the winding head assembly 15 which includes a winding on a coaxial dual spindle drive mechf' head '34 mounted Winding Head 1' Asseen in FIGS. 3, 4m S in the drawing, the wind ing head 34 includes a block or body 35 having. a number of needles 36 mountedfortransverse movement in 1 slots 38 and retained therein by ne'edle'retainer plates proaches its upper and lower positions.

for supporting stator cores 18 in a position to be wound by the windinghead assembly 15. It should be understooel' 'that normally automatic stator core loading, coil 'wedging, coil forming'and unloading stations are provided aroundthe turn table.'.l2 which is automatically 40, Three needles 36 areshown in the winding head 34, however, one, twojor'three needles could be used de pending on the type of coi'e and/cube type of coil'to be wound in thestator core 18.The wires 32 are pulledon the block or body 35 mounted in brackets 37.

In the pesent'ernbodimentof the invention, the nee through guide tubes dles 36 are spaced 40apart to providefor simulta I neous winding of three coils 30 in the stator core 18.

Eachof the needles 36 is provided with a central wire or'feed opening 42 and a drive pin 44. The end 45 of the needle projects outwardly andis wider at the outer end to conform to the shape of the slot 28. Referring to FIG. 4, it will be noted that the needle .36 is shown at the midpoint of movement through one of the slots 28 of the stator core 18. In order to loop the wire 32 through the slot 28 and around the

fingers

24 and 26, the needle 36 must be moved transversely with respect to the winding head block 35 as the winding head ap- Mechanical means are provided for moving the needles 36 transversely with respect to the motion 'of the winding head 34 in theform of cam plates 46 posi- 'tioned in grooves 48 adjacent to the needles 36. Each of the cam plates 46 includes an arcuate groove 52 and is retained within the groove 48'by a cam retainer plate. '50. The needle' 36 is operatively'connected to the cam plate 46 by means of the pin 44' which extends'into the arcuate groove 52in the cam plate 46. Movement of stator core in a step-bystep manner the cam plate 46 relative to the block 35 during the reciprocating movement of the winding head 34 will move the end 45 of the needle 36 through an arcuate curve as more particularly described below. Although the cam plate 46 has been shown as the means for moving the needle, other mechanical linkages can be used to provide transverse movement between the needle and the winding head block 35.

The Spindle Mechanism The winding head 34 and needles 36 are reciprocated and oscillated by means of the spindle mechanism 55 which includes an outer hollow tubular spindle 54 and in inner tubular spindle 56. The outer spindle 54 includes an external splined section 57 and a groove or recess 51 at the upper end. The outer spindle 54 is supported in the frame 14 by means of a linear ball bearing 58. The inner spindle 56 is coaxially mounted for linear movement within the outer tubular spindle 58 and includes a groove or recess 53 at the upper end. The body 35 of the winding head 34 is clamped to the upper end of outer spindle 54 by means of a plate 37 which is positioned in groove 51. The cam plate 46 is pivotally clamped to the inner spindle 56 by means of a plate 47 positioned in groove 53.

The Drive Assembly Means are provided for simultaneously reciprocating the inner spindle 56 and outer spindle 54 for moving the inner spindle 56 relative to the outer spindle 54 to provide for transverse movement of the needle 36. This is accomplished by means of the drive assembly 62 (FIGS. 2, 6, 7 and 8) which includes a motor 64 having a drive shaft 67 and a drive plate 66 having a radially extending slot 69 mounted on the drive shaft 67. The outer spindle 54 is connected to the drive plate 66 by means of a split or open crank arm 68 and the inner spindle 56 is connected to the drive plate by means of a crank arm 70.

In this regard, it should be noted that the crank arm 68 is pivotally connected to the outer spindle 54 by a cross head assembly 72 and has an open center 74 and a bore or opening 76 at its lower end. The crank arm 70 has a bore or opening 79 at its lower end and is connected to the inner spindle 56 by means of a connecting pin 78 pivotally mounted on bearings 93 in opening 91 at the upper end of crank arm 70. It should be noted that connecting pin 78 is located within the opening 74 of crank arm 68.

The

crank arms

68 and 70 are connected to the drive plate 66 by means of an offset drive block or member 80 mounted on a crank pin 82. The offset block 80 includes an opening or bore 84, a first drive section 86 and a second drive section 88. The first drive section 86 is positioned in opening 76 in crank arm 68 and is mounted for rotary motion on roller bearings 87. The second drive section 88 is positioned in opening 79 in crank arm 70 and is mounted on roller bearings 90. The offset block 80 is secured to the drive plate 66 by inserting the crank pin 82 through the opening 84 and positioning a retainer member 92 on the end of the pin 82. A nut 94 is mounted on the threaded end of the pin 82.

It should be apparent that on rotation of the drive plate 66 both of the

spindles

54 and 56 will reciprocate in the frame 14. Relative movement between the

spindles

54 and 56 is provided by means of the offset relation between the

drive sections

86 and 88. It should be noted that the first drive section 86 is eccentrically offset radially outwardly from the drive pin 82 and the second drive section 88 is offset radially inwardly from the drive pin 82. The distance of linear movement of the outer spindle 54 will therefore be equal to twice the radial distance of the center axis of the first drive section 86 from the axis of the drive shaft 67. The distance of linear movement of the inner spindle 56 will be equal to twice the radial distance of the axis of the second section 88 from the axis of the drive shaft 67. The distance between the axis of the two

sections

86 and 88 is fixed so that the relative movement of the cam plate 46 and winding head block 35 is always the same regardless of the length of the stroke of the spindle assembly 55. In the present embodiment a three-quarter inch difference is provided between the first and

second sections

86 and 88 which provides an inch and one-half difference in the movement between the cam plate 46 and needle 36.

Means are provided for varying the length of the stroke of the winding head assembly 15. This is accomplished by moving the crank pin 82 radially in the slot 69 in the drive plate 66. In this regard, it should be noted that the crank pin 82 includes a T-head 97 which is positioned in the slot 69. On assembly the T-head 97 is positioned in the slot 69 and the nut 94 tightened to seat the T-head 97 tightly against the drive plate 66. To adjust the stroke the nut 94 is loosened and the crank pin 82 moved radially inward or outward and the nut 94 retightened. It should be noted that the movement of the inner spindle 56 with respect to the outer spindle will remain constant regardless of the length of the stroke of the winding head assembly 15.

Rotary motion is provided between the spindle 54 and the crank arm 68 by the cross head assembly 72. The cross head assembly 72 includes a set of brackets 61 having coaxial openings 63 and a plate 65 having a central opening 77 and support pins 75. .The plate 65 is mounted on the lower end of the outer spindle 54 between a pair of thrust bearings 71. One of said thrust bearings 71 abutting against the lower end of the splined section 57 and the other thrust bearing 71 being retained on the spindle 54 by a nut 73. The spindle 54 is free to rotate on the thrust bearings 71 within the opening 77 of the plate 65. The pins are pivotally mounted in bearings 59 in the openings 63.

The connecting pin 78 includes a head 81 having an opening 83 transverse to the axis of pin 78 and a threaded section at the end of the pin 78. The head 81 is connected to the end of the spindle 56 by a bolt 89 which extends through the opening 83. The pin 78 is secured to the crank arm 70 by means of a washer and nut 96.

Oscillating Drive Assembly The spindle assembly 55 is rotated at or near the end of each reciprocating motion or stroke to move the winding head to the next slot 28 in the stator core by means of an oscillating drive assembly 100 (FIGS. 2 and 9). This drive assembly 100 includes a gear 102 mounted on the splined section 57 of the outer spindle 54 and a rack 104 positioned to engage the gear 102 and driven by a cam 106. The gear 102 is supported for rotation on a pair of thrust bearings 108 which are mounted on fixed support members 110. The gear 102 is provided with an internal gear 103 which is in mesh with spline 57 to allow for linear motion of the spindle 54.

The gear 102 is rotated by means of the rack 104 which is secured to a plate 112. Referring to FIG. 9, the plate 112 is shown mounted for linear movement on tracks 114 provided in fixed parallel support members 116. A pair of cam rollers 1 18 are mounted on the back of the plate 112 in a position to engage the outer edge of cam 106. The cam 106 is secured to a shaft 120 journaled in a housing 122 on the frame 14. The shaft 120 is driven off the motor 64 by means of a drive belt 124 mounted on a drive pulley 126 on the motor and a driven pulley 128 on shaft 120.

In operation cam 106 is rotated at the same speed as the drive assembly 55 due to the common connection with motor 64. The cam 106 and cam rollers 118 are designed to provide positive movement of the rack 104 whenever the winding head approaches the end of its reciprocating motion. This type of an oscillating drive assembly is well known and can be adjusted to provide a different amount of angular movement as required for a particular coil.

OPERATION In the stator core winding machine of the type contemplated herein, the stator core 18 is placed in the support ring 16 in the turn table 12. The turn table is rotated to position the stator core at the coil winding station and the tooling rings 20 and 22 are closed on the stator core with the

fingers

24 and 26 vertically aligned between the slots 28 in the stator core. The wire 32 which is used to form the coils is threaded through the guide tubes 33 and the opening 42 in the needle 36. The winding head assembly is then ready to commence the coil winding operation.

When the motor 64 is energized to start the coil winding operation, the winding head assembly will reciprocate vertically and will oscillate through a preset angle at each end of the reciprocal strokes. The needle 36 moves with the winding head assembly vertically through the slots 28 in the stator core. The needle 36 is moved transversely through an acruate path by means of the cam plates 46 to position the wire 32 at the end of each reciprocal stroke radially outwardly from the slots 28 over the

singers

24 and 26. When the winding head assembly 15 is oscillated to position the needle 36 above or below the next slot in the stator core 18, the wire 32 will be wound over or under the fingers "24 and 26 respectively. When the direction of reciprocal movement is reversed, the needle 36 will again be moved in an arcuate path through the slot 28 to a position radially outwardly of the

other fingers

24 and 26.

The transverse motion of the needle 36 is achieved by moving the cam plate 46 relative to the winding head block during each stroke of the winding head assembly. The relative motion between the cam plate 46 and block 35 is provided by the dual spindle mechanism 55 and the drive assembly 62. In this regard, the outer spindle 54 is rotatably connected to the crank arm 68 which is driven by the drive plate 66. The inner spindle 56 is connected to the crank arm 70 which is driven by the drive plate 66. The connection of the

crank arms

68 and 70 to the drive plate is provided by the offset block 80 which provides a fixed difference between the stroke of the outer and

inner spindles

54 and 56.

The stroke of the winding head assembly 15 is adjusted to accommodate various types stator cores by adjusting the distance of the crank pin 82 from the center or axis of the drive plate 66. This is accomplished by loosening nut 94 and sliding the crank pin 82 radially inwardly or outwardly in slot 96 in the drive plate 66. The amount of relative movement between the inner spindle 54 and outer spindle 56 will remain fixed regardless of the length of the stroke of the winding head assembly.

I claim:

1. In a stator core winding machine,

a winding head assembly comprising a winding head having a needle mounted for transverse movement relative to the direction of motion of the winding head,

a cam plate defining an arcuate groove mounted in the winding head for movement relative thereto,

means operatively connecting said needle to said cam plate to follow the path of motion defined by said groove,

means for linearly moving said winding head in oppositely directed strokes, said linearly moving means including means for moving said cam plate relative to said winding head to produce transverse movement of said needle through an arcuate path defined by said groove during each stroke of linear movement of said winding head,

and means for rotating said winding head near the end of each stroke of linear movement of said winding head.

2. The winding head assembly according to claim 1 wherein said means for moving said cam plate includes a hollow tubular spindle connected to said winding head and a tubular spindle coaxially mounted in said hollow tubular spindle and connected to said cam plate and means for simultaneously reciprocating said spindles through different length strokes.

3. In a stator core winding machine,

a winding head assembly including,

a main body,

means for reciprocating said main body directed strokes,

means for rotating said main body at the end of each stroke of reciprocation of said main body,

a needle mounted in said body for movement transverse to the direction of movement-of said main body, and

a cam plate defining an arcuate groove mounted in said main body and being operatively connected to said needle,

said reciprocating means including means for moving said cam plate relative to said main body during each stroke of reciprocation of said main body whereby said needle is moved through a predetermined arcuate path during each stroke of reciprocation of said main body.

4. The winding head assembly according to claim 3 wherein said means for moving said cam plate includes a tubular spindle and a drive assembly for moving said tubular spindle through a different stroke than said main body.

5. The winding head assembly according to claim 3 wherein said reciprocating means includes a hollow tubular spindle and said means for moving said cam plate includes a tubular spindle coaxially mounted within said hollow tubular spindle and means for moving said spindles through strokes of different length.

in oppositely 6. The winding head assembly according to claim 4 wherein said drive assembly comprises a drive plate, a crank pin adjustably mounted in said drive plate, means for adjusting the position of said crank pin in said cam plate and an offset cam block mounted on said crank pin and being operatively connected to said spindles.

7. The winding head assembly according to claim 6 wherein said offset block includes a first cam section having an axis located radially outwardly from said drive pin and a second cam section having an axis located radially inwardly of said drive pin.

8. A winding head assembly for a stator core winding machine, said assembly including:

a winding head having a number of radial slots, a needle in each of said slots,

cam means defining an arcuate groove in said winding head for moving said needles transversely with respect to the direction of movement of the winding head,

means for reciprocating said winding head in oppositely directed strokes, said reciprocating means including means for moving said cam means through different length strokes whereby each of said needles is moved transversely through an arcuate path during each stroke of the reciprocal movement of said winding head,

and means for rotating said winding head at the end of each stroke of reciprocal movement.

9. The assembly according to claim 8 wherein said reciprocating means includes a hollow tubular spindle connected to said winding head and a tubular spindle connected to said moving means, said tubular spindle being coaxially mounted in said hollow tubular spindle.

10. The winding head assembly according to claim 9 wherein said reciprocating means further includes a drive assembly connected to said hollow spindle and said tubular spindle to provide strokes of different length.

11. The winding head assembly according to claim 10 wherein said drive assembly includes an offset cam block operatively connected to said spindles to provide a fixed difference in each stroke of said spindles.

12. The assembly according to claim 8 wherein said cam means includes an arcuate groove and each of said needles includes means for operatively engaging said groove whereby said needles are moved through arcuate paths of motion duringeach reciprocal movement of said winding head.

Claims

1. In a stator core winding machine, a winding head assembly comprising a winding head having a needle mounted for transverse movement relative to the direction of motion of the winding head, a cam plate defining an arcuate groove mounted in the winding head for movement relative thereto, means operatively connecting said needle to said cam plate to follow the path of motion defined by said groove, means for linearly moving said winding head in oppositely directed strokes, said linearly moving means including means for moving said cam plate relative to said winding head to produce transverse movement of said needle through an arcuate path defined by said groove during each stroke of linear movement of said winding head, and means for rotating said winding head near the end of each stroke of linear movement of said winding head.

3. In a stator core winding machine, a winding head assembly including, a main body, means for reciprocating said main body iN oppositely directed strokes, means for rotating said main body at the end of each stroke of reciprocation of said main body, a needle mounted in said body for movement transverse to the direction of movement of said main body, and a cam plate defining an arcuate groove mounted in said main body and being operatively connected to said needle, said reciprocating means including means for moving said cam plate relative to said main body during each stroke of reciprocation of said main body whereby said needle is moved through a predetermined arcuate path during each stroke of reciprocation of said main body.

6. The winding head assembly according to claim 4 wherein said drive assembly comprises a drive plate, a crank pin adjustably mounted in said drive plate, means for adjusting the position of said crank pin in said cam plate and an offset cam block mounted on said crank pin and being operatively connected to said spindles.

8. A winding head assembly for a stator core winding machine, said assembly including: a winding head having a number of radial slots, a needle in each of said slots, cam means defining an arcuate groove in said winding head for moving said needles transversely with respect to the direction of movement of the winding head, means for reciprocating said winding head in oppositely directed strokes, said reciprocating means including means for moving said cam means through different length strokes whereby each of said needles is moved transversely through an arcuate path during each stroke of the reciprocal movement of said winding head, and means for rotating said winding head at the end of each stroke of reciprocal movement.

12. The assembly according to claim 8 wherein said cam means includes an arcuate groove and each of said needles includes means for operatively engaging said groove whereby said needles are moved through arcuate paths of motion during each reciprocal movement of said winding head.