Patent GB-1377843-A (GB)
Title: Method and apparatus for forming windings on rotors of electric  motos or generators
IPC: H02K15/08
Filed: 1972-01-13
Abstract: 1377843 Winding rotors ROBERT KRUPS 13 Jan 1972 [19 Jan 1971] 1711/72 Heading B3A A method of applying windings to rotors 20, Fig. 10, of electric motors or generators, provided with angularly spaced peripheral slots 50 for receiving convolutions of wire-like condoctors 46 comprises the steps of transporting a plurality of rotors to a plurality of discrete winding stations I-VIII, Fig. 1, simultaneously forming windings on the rotors at the stations, and removing all the wound rotors from the stations. A second plurality of unwound rotors may be transported to the eight winding stations simultaneously with the removal of wound rotors along an endless conveyer belt 69. All the rotors are correctly oriented at the winding stations prior to winding so as to ensure that selected slots of all rotors assume predetermined angular positions for reception of wire-like conductors, whereby the wound rotor has a plurality of angularly spaced windings. Each rotor may be provided with a commutator 96 having a plurality of hook-shaped retainers (145), Fig. 14 (not shown), for the convoluted conductors, the commutators being shielded during winding to prevent engagement of conductors and the commutators while the winding takes place. A variable speed motor (25), Fig. 3 (not shown), drives endless belts 27, 33 around guide rolls 29-(31), Fig. 2 (not shown), intermediate gears 26, 28, and drive gears 34, the latter serving to rotate hollow winding shafts (35), Fig. 3 (not shown), of each winding station. Each shaft (35) has a head 43, guide roller 45 for deflecting the conductor 46 which is fed through the shaft from a supply (46A), a winding arm 47, drivable by shaft (35) and guide roll 49. A rotatably mounted clamping member 53 is used to engage each individual rotor. A horizontal shifting bar (55) moves the shaft (35) lengthwise and is itself movable by two fluid-operated motors 58. Front wall 22 of the apparatus supports the horizontal conveyer 69 for transporting the rotors and comprises an endless link chain (79), Fig. 12 (not shown), between confining plates 75, 77. A sprocket wheel (81), Fig. 4 (not shown), may be driven by a variable speed motor (82). Certain links 90 are provided with outwardly extending projections 91 supporting a holder 93 for rotor shafts 97. When the chain (79) is brought to a standstill the holders 93 and back supports (99) register with the winding stations. Forward movement of shifting bar (55) biases rotors 20 against surfaces (102) of the supports at the same time being gripped by members 53. The members 53, along with guides 147 (Figs. 16, 17, not shown), ensure that conductors 46 are introduced into selective slots, 50a), (50b), Fig. 11 (not shown), and simultaneously automatically centre the rotors. An indexing bar (104) selects the initial angular positions of the rotors prior to the first winding operation. After winding the rotors the conductors are severed using a pin (137), Fig. 11, in conjunction with a threaded recess (136) in a pivotable jaw (121), and the winding arms are made to extend downwardly. Motor (82) starts to drive chain (79) and rotors leave the winding stations and unwound rotors take their places. Conveyer 69 also supports shielding caps (138) which serve to partially overlie the commutators 96 of the rotors at the winding stations. It is possible to regulate the speed of the winding arms 47, however, it is preferred that all arms rotate at identical speeds. A magazine supply of rotors can also be provided with a plurality of shoots each of which delivers a rotor to an empty holder along chain 79. The various operations are automatic and preferably controlled by a suitable programming system (not shown).