Method for forming windings on rotors of electric motors or the like

• US 3,878,602 A
• Filed: 05/06/1974
• Issued: 04/22/1975
• Est. Priority Date: 01/19/1971
• Status: Expired due to Term

• Current Assignee: Klaus Grohmann, Klaus Schubert
• Original Assignee: Klaus Grohmann, Klaus Schubert
• Inventors: Schubert, Klaus, Grohmann, Klaus
• Primary Examiner(s): Hall, Carl E.
• Application Number:
  US05/467,274
• Time in Patent Office: 351 Days
• Field of Search: 29/598,596,25D,25R,605 242/7.03,7.5B,7.11
• US Class Current: 29/598
• CPC Class Codes: H02K 15/09 by laying conductors into slotted rotors
• CPC Class Codes: Y10T 29/49012 Rotor
• CPC Class Codes: Y10T 29/49071 by winding or coiling
• CPC Class Codes: Y10T 29/53143 Motor or generator

Abstract

Apparatus for winding several rotors for electric motors or the like in a simultaneous operation has a row of equidistant winding stations and an endless chain conveyor which transports sets of fresh rotors to the winding stations and simultaneously removes freshly wound rotors from such stations. The rotors at the winding stations are automatically clamped and indexed at selected intervals preparatory to formation of discrete windings. The conveyor supports movable caps which shield the commutators of rotors at the winding stations during the formation of discrete windings but allow for the placing of conductors over hooks provided on the commutators prior to formation of the first winding and upon completed formation of each subsequent winding.

Claims

1. A method of winding rotors of electric machines, comprising the steps of transporting a plurality of rotors each provided with angularly spaced peripheral slots along a single predetermined path in such a manner that the rotors have random angular orientations and are maintained spaced from each other by predetermined distances along the direction of transportation and moving said plurality of rotors to a plurality of substantially identical winding stations located along the length of said predetermined path and spaced from each other by distances corresponding to said predetermined distances;

rotating the rotors at said winding stations until all the rotors assume the same angular orientation;

simultaneously forming windings on the rotors at said stations in substantially identical manner at all of said stations; and

removing all of the thus Wound rotors from said stations.

2. A method as defined in claim 1, further comprising the step of transporting a second plurality of fresh rotors to said winding stations simultaneously with said removing step.

3. A method as defined in claim 2, wherein the rotors are simultaneously transported along an endless path a first portion of which is adjacent to said winding stations and in a second portion of which the treated rotors are removed from and fresh rotors are introduced into said path.

4. A method as defined in claim 1, wherein said forming step comprises providing each of the rotors at said winding stations with a plurality of discrete angularly offset windings and indexing the rotors subsequent to the formation of each discrete winding.

5. A method as defined in claim 1, further comprising the step of assembling at least one second plurality of fresh rotors and transporting said second plurality to said winding stations simultaneously with said removing step.

6. A method as defined in claim 1, further comprising the step of clampingly engaging the rotors at said stations between stationary and yieldable clamping surfaces.

7. A method as defined in claim 6, wherein said engaging step comprises placing all of said plurality of rotors into exact parallelism with and at predetermined distances from each other.

8. A method as defined in claim 1, wherein said forming step comprises providing each of the rotors at said winding stations with a plurality of discrete angularly offset windings and indexing the rotors subsequent to the formation of each discrete winding, said discrete windings being formed by revolving arms at said winding stations and further comprising the step of gradually reducing the speed of such arms shortly prior to completion of each discrete winding.

9. A method as defined in claim 8, further comprising the step of rotating all of said arms at identical speeds.

10. A method as defined in claim 1, further comprising the steps of establishing discrete sources of conductors for each of said winding stations, withdrawing conductors from the respective sources in the course of said forming step, and gripping the conductors in regions located intermediate said sources and the respective winding stations upon completion of said forming step.

11. A method as defined in claim 10, further comprising the step of severing said conductors in said regions in response to removal of wound rotors from said winding stations.

12. A method as defined in claim 11, wherein said severing step comprises breaking the conductors.

13. A method as defined in claim 1, wherein said step of transporting comprises the step of transporting a plurality of rotors along an endless path lying in a general plane and maintaining the rotors so oriented that the longitudinal axes of the rotors are parallel to each other and normal to said plane.