Method of looping armature coil leads about commutator tangs

• US 4,153,985 A
• Filed: 04/27/1977
• Issued: 05/15/1979
• Est. Priority Date: 04/27/1977
• Status: Expired due to Term

• Current Assignee: Eastman Kodak Company
• Original Assignee: Eastman Kodak Company
• Inventors: Hibbard, Richard L.
• Primary Examiner(s): Lanham, C. W.
• Assistant Examiner(s): Crane, Daniel C.
• Application Number:
  US05/791,258
• Time in Patent Office: 748 Days
• Field of Search: 29/597, 29/598, 29/735, 29/732, 242/7.05 B, 242/7.03, 242/7.05 C, 242/7.05 R
• US Class Current: 29/597
• CPC Class Codes: H02K 15/09 by laying conductors into slotted rotors
• CPC Class Codes: Y10T 29/49011 Commutator or slip ring assembly
• CPC Class Codes: Y10T 29/53157 Means to stake wire to commutator or armature

Abstract

A flier-type armature winder winds armatures consisting of a commutator with circumferentially gapped tangs and an armature core, co-axially mounted on a common shaft. In operation, at least one flier winds coils of wire successively onto the armature core and a shield covers the commutator tangs to prevent them from being accidentally engaged by the wire. After each winding of the wire coils, a wire lead from the last wound coil is looped about a corresponding one of the commutator tangs. The wire loop is formed by first securing the wire lead to wire-engaging means located on the shield. Then the shield is moved to substantially align its wire engaging means and the secured wire lead with a first one of first and second gaps in the commutator which are disposed at opposite sides of the corresponding tang. Next, the shield is retracted from the commutator tangs to lay a trailing portion of the wire lead in the first gap. The stretch of wire lead between the first gap and the wire-engaging means is then bent completely across the corresponding tang by rotating the shield to substantially align its wire-engaging means and the secured portion of the wire lead with the second gap. At the same time or subsequently, the bent wire is looped partially about the corresponding tang by returning the shield along its rotational axis to again cover the commutator tangs.

Claims

1. In an armature winding method wherein an unwound armature having a commutator with circumferentially gapped tangs is placed in an armature winding machine in which a flier successively winds coils of wire onto the armature while a shield covers the commutator tangs, and wherein after each winding by the flier a wire lead extending from the last wound coil to the flier is looped about an exposed corresponding one of the tangs, the steps for looping the wire lead about the corresponding tang comprising:

after a coil is wound, coupling the wire lead extending between the wound coil and the flier to wire-engaging means on the shield;

positioning the wire-engaging means to which the wire lead is coupled over a first one of first and second gaps in the commutator located respectively at opposite sides of a tang corresponding to the wound coil, by effecting relative movement between the commutator and the shield;

laying the wire lead in the first gap by effecting relative translation between the commutator and the wire-engaging means as the shield is retracted to uncover the tangs; and

forming a loop about the corresponding tang in a portion of the wire lead which extends between the first commutator gap and the wire engaging means by effecting relative rotation between the commutator and the shield through an angle substantially equal to an angle subtended by the distance between two corresponding points respectively in the first and second gaps and by effecting relative translation between the commutator and the shield until the wire-engaging means is positioned over the second commutator gap.

2. The method steps as recited in claim 1, wherein the wire lead extending between the wound coil and the flier is coupled to the wire-engaging means by first laying the wire lead against the exterior surface of the shield and by then moving the shield to bring the wire-engaging means into engagement with the wire lead.

3. The method steps as recited in claim 1, wherein the wire-engaging means is formed by a notch in the exterior surface of the shield and wherein the wire lead extending between the wound coil and the flier is coupled to the wire-extending means by first laying the wire lead against the exterior surface of the shield and by then moving the shield to position the notch opposite the wire lead to permit the wire lead to move into the notch.

4. In an armature winding method wherein an unwound armature having a commutator with circumferentially gapped tangs is placed in an armature winding machine in which a flier successively winds coils of wire onto the armature while a shield covers the commutator tangs, and wherein after each winding by the flier a wire lead extending from the last wound coil to the flier is looped about an exposed corresponding one of the tangs, the steps for looping the wire lead about the corresponding tang comprising:

after a coil is wound, coupling the wire lead extending between the wound coil and the flier to wire-engaging means on the shield;

substantially aligning the wire-engaging means to which the wire lead is coupled and one of two gaps in the commutator located respectively at opposite sides of a tang corresponding to the wound coil, by effecting relative movement between the commutator and the shield;

laying the wire lead in the one gap by effecting relative translation between the commutator and the wire-engaging means as the shield is retracted from the commutator to uncover the tangs;

bending the wire lead across the corresponding tang by effecting relative rotation between the commutator and the shield through an angle substantially equal to an angle subtended by the distance between two points respectively in the two gaps at opposite sides of the corresponding tang;

looping the bent wire lead about the corresponding tang by effecting relative translation between the commutator and the shield along their rotational axis at least until the shield again covers the tangs; and

releasing the wire lead from the wire-engaging means to enable the flier to wind another coil.

5. In an armature winding method wherein an unwound armature having a slotted core and a commutator with circumferentially gapped tangs is placed in an armature winding machine in which a flier successively winds coils of wire into pairs of slots in the armature core while a peripheral end portion of a shield covers the commutator tangs, and wherein after each winding by the flier a wire lead extending from the last wound coil to the flier is looped about an exposed corresponding one of the tangs, the steps for looping the wire lead about the corresponding tang comprising:

after a coil is wound, laying the wire lead extending between the wound coil and the flier against the peripheral end portion of the shield;

coupling the wire lead to the shield by rotating the shield to move wire-engaging means on its end portion into engagement with the wire lead;

positioning the wire-engaging means to which the wire lead is engaged over a first one of first and second gaps in the commutator located respectively at opposite sides of a tang corresponding to the wound coil, by continuing to rotate the shield in its direction for engaging the wire lead;

laying the wire lead in the first gap by effecting relative translation between the commutator and the wire-engaging means as the shield is retracted from the commutator to uncover the tangs;

bending the wire lead across the corresponding tang by rotating the shield in a direction opposite to its direction for coupling the wire lead and through an angle substantially equal to an angle subtended by the distance between two corresponding points respectively in the first and second gaps;

looping the bent wire lead about the corresponding tang by translating the shield along its rotational axis to position the wire-engaging means over the second commutator gap; and

releasing the wire lead from the wire-engaging means to enable the flier to wind another coil.

6. The method steps as recited in claim 5, further comprising the step of:

before releasing the wire lead, continuing to rotate the shield in its direction for bending the wire lead until the wire-engaging means is positioned opposite an armature core slot into which the flier next winds another coil.

7. The method steps as recited in claim 5, wherein at least the final segment of rotation of the shield in its direction for bending the wire lead takes place simultaneously with the return of the shield along its rotational axis to position the wire-engaging means over the second gap.

8. In an armature winding method wherein an unwound armature having a slotted core and a commutator with circumferentially gapped tangs is placed in an armature winding machine in which a flier successively winds coils of wire into pairs of slots in the armature core while a peripheral end portion of a shield covers the commutator tangs, and wherein after each winding by the flier a wire lead extending from the last wound coil to the flier is looped about an exposed corresponding one of the tangs, the steps for looping the wire lead about the corresponding tang comprising:

after a coil is wound, laying the wire lead extending between the wound coil and the flier against the peripheral end portion of the shield by rotating the flier in a direction opposite to its direction for winding coils;

coupling the wire lead to the shield by rotating the shield to position a notch in its end portion beneath the wire lead and permit the wire lead to drop into the notch;

positioning the notch with the wire lead over a first one of first and second gaps in the commutator located respectively at opposite sides of a tang corresponding to the wound coil, by continuing to rotate the shield;

laying the wire lead in the first gap by retracting the shield along its rotational axis in a direction away from the commutator to uncover the tangs and to effect relative translation between the commutator and the notch;

bending the wire lead across the corresponding tang by rotating the shield in a direction opposite to its direction for coupling the wire lead and through an angle substantially equal to an angle subtended by the distance between two corresponding points respectively in the first and second gaps;

looping the bent wire lead about the corresponding tang by translating the shield along its rotational axis to position the notch with the wire lead over the second commutator gap;

positioning the notch with the wire lead opposite an armature core slot into which the flier next winds the wire, by continuing to rotate the shield; and

releasing the wire lead from the notch by rotating the flier in its direction for winding coils.