Armature winding method and apparatus

• US 5,379,511 A
• Filed: 03/16/1993
• Issued: 01/10/1995
• Est. Priority Date: 03/16/1993
• Status: Expired due to Fees

• Current Assignee: Globe Products Incorporated
• Original Assignee: Globe Products Incorporated
• Inventors: Clark, Carl L., Dolgas, Patrick A., Corey, Nathan A.
• Primary Examiner(s): Hall, Carl E.
• Application Number:
  US08/032,359
• Time in Patent Office: 665 Days
• Field of Search: 29/597, 29/598, 29/596, 29/733, 29/735, 29/564.6, 242/7.03, 242/7.05 B
• US Class Current: 29/597
• CPC Class Codes: H02K 15/00 Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
• CPC Class Codes: Y10T 29/49011 Commutator or slip ring assembly
• CPC Class Codes: Y10T 29/5142 and means to sever work from supply
• CPC Class Codes: Y10T 29/53148 Means to assemble commutator

Abstract

Pivotally mounted wire trimming blades having sharp, wire trimming, edges are positioned so that they extend through notches in the inner commutator shield of a double flier armature winder and lie against commutator start tangs and extend closely adjacent the outer periphery of the inner shield. The start or finish wires, as the case may be, are severed by being pulled against the wire trimming edges. The wire trimming edges have offset portions, or else the trimming blades are movable to offset locations, so that the trimming of the start wires are at locations which are radially and longitudinally offset from the locations at which the finish wires are trimmed.

Claims

1. In an armature winding machine for winding an armature having an armature shaft, a core having coil-receiving slots mounted on said shaft, and a commutator mounted on said shaft, said commutator having coil lead-receiving tangs, said armature winding machine having a winding station, means for holding an armature in said winding station, at least one wire guiding flier for winding coils of wire in said coil-receiving slots, a commutator shield assembly comprising an inner shield having at least one notch for exposing a commutator tang to enable wire leading from said flier to be hooked around said exposed tang, and an outer shield movable between a first, extended position in which it covers said notch and a second, retracted position wherein it uncovers said notch,

wire clamp means actuated to grip a stretch of wire extending from said flier at the end of the winding of one armature in said winding station until the commencement of the winding of the next armature in said winding station, and drive means for moving said wire clamp means, the improvement comprising:

a wire trimming blade having a sharp edge,

a blade mounting bracket,

means for pivotally mounting said wire trimming blade on said mounting bracket in a position wherein said wire trimming blade is closely adjacent the outer periphery of said inner shield and substantially parallel to the longitudinal axis of an armature in said winding station for rocking movement about a pivot axis extending transversely through said blade and intermediate its ends,

means for pivoting said blade about said pivot axis to move said blade from a first position in which said sharp edge is located closely adjacent a tang and radially nearer the armature shaft than the outer edge of said last mentioned tang when said outer shield is retracted and located sufficiently remote from said tang when said outer shield is extended that it would not interfere with the removal of said armature from said winding station, and

means on said inner shield for preventing lateral movement of said wire trimming blade.

2. The apparatus of claim 1 wherein said last mentioned means includes a pair of plates mounted on said inner shield between which the wire trimming blade is confined.

3. The apparatus of claim 1 further comprising means on said inner shield for preventing lateral movement of said support bracket.

4. The apparatus of claim 3 wherein said last mentioned means includes a pair of plates mounted on said inner shield between which said support bracket is confined.

5. The apparatus of claim 1 wherein said wire trimming blade has two sharp edges which are radially and longitudinally offset from one another for severing, respectively, the start wires and the finish wires.

6. In an armature winding machine for winding an armature having an armature shaft, a core having coil-receiving slots mounted on said shaft, and a commutator mounted on said shaft, said commutator having coil lead-receiving tangs, said armature winding machine having a winding station, means for holding an armature in said winding station, at least one wire guiding flier for winding coils of wire in said coil-receiving slots, a commutator shield assembly comprising an inner shield having at least one notch for exposing a commutator tang to enable wire leading from said flier to be hooked around said exposed tang, and an outer shield movable between a first, extended position in which it covers said notch and a second, retracted position wherein it uncovers said notch,

wire clamp means actuated to grip a stretch of wire extending from said flier at the end of the winding of one armature in said winding station until the commencement of the winding of the next armature in said winding station, and drive means for moving said wire clamp means, the improvement comprising:

a wire trimming blade having two sharp edges which are radially and longitudinally offset from one another for severing, respectively, the start wires and the finish wires,

a blade mounting bracket,

means for pivotally mounting said wire trimming blade on said mounting bracket in a position wherein said wire trimming blade is closely adjacent the outer periphery of said inner shield and substantially parallel to the longitudinal axis of an armature in said winding station for rocking movement about a pivot axis extending transversely through said blade and intermediate its ends, and

means for pivoting said blade about said pivot axis to move said blade from a first position in which said sharp edges are located closely adjacent a tang and radially nearer the armature shaft than the outer edge of said last mentioned tang when said outer shield is retracted to a second position in which said sharp edges are located sufficiently remote from said tang when said outer shield is extended that it would not interfere with the removal of said armature from said winding station.

7. In a method of winding armatures by a double flier armature winding machine and automatically severing start and finish lead wires adjacent each of a pair of commutator start tangs utilizing a wire trimming member having edge surfaces around which the start and finish wires are coursed and against which the start and finish wires are pulled in order to sever them, the improvement comprising the steps of:

orienting an armature having a start wire looped around a start tang in a position wherein said tang is positioned in alignment with said wire trimming member;

positioning a sharp edge portion of said wire trimming member at a first location between the armature core and the face of said start tang confronting the core;

severing the wire segment leading from said wire gripper to said start tang by moving said wire gripper at a direction to cause said wire segment to be pulled against said sharp edge;

winding coils on said armature core and connecting coil leads between said coils to tangs on said commutator;

after the last pair of coils are wound, hooking a finish wire about a start tang;

orienting said armature with said finish wire hooked about said last mentioned start tang by rotating said armature to position said last mentioned tang in alignment with said wire trimming member;

positioning a portion of said sharp edge of said trimming member between said core and the face of said last mentioned tang at a second location which is radially further from the armature shaft than said first location; and

severing said wire at said second location by moving said wire gripper away from said armature core.

8. The method of claim 7 wherein said second location is longitudinally further from said core then said first location.

9. The method of claim 7 further comprising the step of mounting said blade for pivotal movement on an axis extending transversely through said blade and wherein portions of said sharp edge are laterally spaced apart from one another and offset from one another both radially and longitudinally with respect to an armature being wound.

10. The method of claim 9 wherein said edge portions are positioned in said first location and said second location, respectively, by moving said blade so that said edge portions are displaced both radially and longitudinally with respect to an armature being wound.

11. In a method of winding armatures by a double flier armature winding machine and automatically severing start and finish lead wires adjacent each of a pair of commutator start tangs utilizing a wire trimming member having edge surfaces around which the start and finish wires are coursed and against which the start and finish wires are pulled in order to sever them, the improvement comprising the steps of:

orienting an armature having a start wire looped around a start tang in a position wherein said tang is positioned in alignment with said wire trimming member;

positioning a sharp edge portion of said wire trimming member at a first location between the armature core and the face of said start tang confronting the core;

severing the wire segment leading from said wire gripper to said start tang by moving said wire gripper at a direction to cause said wire segment to be pulled against said sharp edge;

winding coils on said armature core and connecting coil leads between said coils to tangs on said commutator;

after the last pair of coils are wound, hooking a finish wire about a start tang;

orienting said armature with said finish wire hooked about said last mentioned start tang by rotating said armature to position said last mentioned tang in alignment with said wire trimming member;

positioning a portion of said sharp edge of said trimming member between said core and the face of said last mentioned tang at a second location which is longitudinally further from the armature shaft than said first location; and

severing said wire at said second location by moving said wire gripper away from said armature core.

12. The method of claim 11 further comprising the step of mounting said blade for pivotal movement on an axis extending transversely through said blade and wherein portions of said sharp edge are laterally spaced apart from one another and offset from one another both radially and longitudinally with respect to an armature being wound.

13. The method of claim 11 wherein said edge portions are positioned in said first location and said second location, respectively, by moving said blade so that said edge portions are displaced with respect to an armature being wound.