Abstract:
A wound electric-motor stator (1) equipped with a device for the temporary storage of the wires (6) of the winding of the stator. This storage device consists, on the one hand, of the stator itself (5) and, on the other hand, of an auxiliary piece (10) provided with a catch (12) for catching on the stator and with a hole (13), for fastening the end of the wires (6) of the stator. These wires (6) can be wound by driving the auxiliary piece in rotation.

Description:
FIELD OF THE INVENTION 
     The subject of the present invention is a wound electric-motor stator comprising means for storing a particularly length of stator winding wire while waiting for its subsequent connection. 
     PRIOR ART 
     The invention relates more particularly to a problem associated with wound stators between the moment when the stator has been provided with its winding and the moment when this stator, associated with a rotor to form a motor, is mounted in an appliance, a machine or a device. During this interval, the wound stator has more or less long wires projecting from the winding and intended for connecting the stator to terminals which can be at a greater or lesser distance from the stator, depending on the appliance in which it is to be mounted. During this interval, the stator is handled for stocking, packaging, transport and finally mounting. During each of these handling operations, the wires projecting from the stator are exposed to all kinds of stresses liable to damage the wires, in particular to damage the insulation, or even to bring about the breaking or cutting of the conductor. In one instance or the other, such a fault makes it necessary to dismount the appliance, in whiich the motor was mounted, and to replace the stator. However, the cost of dismounting and of a wound stator is high. 
     The U.S. Pat. No. 4,000,764 discloses an appliance making it possible to wind a particular length of winding wire of a stator on small posts fastened to the stator. This solution makes it possible to store only a small length of wires, and the wound wire, constricted to a small diameter, cannot be unwound easily in order to connect it to a terminal which, moreover, must be nearby, let alone the risks of damage to the insulation of the wire during the winding and unwinding of the wire. 
     SUMMARY OF THE INVENTION 
     The object of the invention is to make it possible to store a long length of wires of the stator in a flexible way and to eliminate the risks of damage to these wires. 
     The wound electric-motor stator according to the invention is defined in that it is equipped with an auxiliary piece provided, on the one hand, with means for catching on the stator and, on the other hand, with means for fastening the end of the wires of the winding of the stator, and in that it has catching means complementary with those of the auxiliary piece, the auxiliary piece caught in the stator constituting, together with the stator, a device for the temporary storage of the wires of the winding of the stator. 
     Whatever the length of the wires attached to the stator, these are stored, in particular enclosed in a receptacle, in such a way that the wound stator can be handled without risk to these wires and much more easily. 
     The auxiliary piece will generally be removed during the mounting of the motor in an appliance. In this case, if appropriate, it can be reused. The auxiliary piece can be also be used as a connector. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The accompanying drawing illustrates eight embodiments of the invention by way of example. 
     FIG. 1 is a partial view in axial half-section of a wound stator according to a first embodiment. 
     FIG. 2 is a similar view of a second embodiment. 
     FIG. 3 is a similar view of a third embodiment. 
     FIG. 4 is a similar view of a fourth embodiment. 
     FIG. 5 is a similar view of a fifth embodiment. 
     FIG. 6 is a similar view of a sixth embodiment. 
     FIG. 7 is a similar view of a seventh embodiment. 
     FIG. 8 is a partial view of an eighth embodiment on a larger scale. 
     FIG. 9 shows an example of the mounting of a stator according to FIG. 8 in a tubular motor. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     FIG. 1 shows partially an electric motor consisting of a stator 1 provided with a winding 2 and of a rotor 3, one end of the shaft 4 of which is mounted rotatably in the frame 5 of the stator. A strand of wires 6 projects from the winding of the stator so as to connect the latter to the terminals of a supply. 
     The frame 5 of the stator has an axial extension in the form of a cylindrical tubular bearing surface 8, the end of which is provided with a bead 9. Caught on this bearing surface 8 is an auxiliary piece 10 of tubular shape and provided with a radial wall 11. The end of the auxiliary piece 10 facing the stator is split longitudinally over a particular length, so as to form a particular number of elastic tongues 12 terminating in a hook which catches elastically on the bead 9 of the bearing surface 8 of the stator. This type of snap catch is well known per se. The wall 11 of the auxiliary piece has a hole 13 serving for the passage of the strand of wires 6, at the end of which a knot 14 is formed, so as to retain the end of the strand on the auxiliary piece 10. 
     The auxiliary piece 10 forms, together with the stator, a receptacle 15, in which a substantial length of strand 6 can be stored. This storage can take place simply in loose form or by winding, as shown in the drawing, the auxiliary piece 10 for this purpose being driven in rotation about a bearing surface 8 of the stator. 
     The auxiliary piece 10 is preferably made of plastic. During the mounting of the motor in an appliance, the piece 10 is detached from the stator and the strand of wires 6 is detached from the auxiliary piece in order to be fastened to the terminals of the electrical supply of the appliance or of the device intended to be equipped with the motor. 
     The second embodiment, illustrated in FIG. 2, differs from the first embodiment in that the receptacle for storing the strand of wires 6 consists essentially of a tubular extension 16 of the stator, said extension being provided with elastic hooks 17, on which catches, by means of a bead 27, an auxiliary piece 20 of the same shape as the auxiliary piece 10, but substantially shorter and, like the latter, provided with a radial wall 21 which closes the receptacle and which at the same time serves for retaining the strand of wires. 
     The third embodiment, illustrated in FIG. 3, differs from the first embodiment in that the strand of wires 6 projects from the stator via a passage 18 located outside the tubular bearing surface 8 and is wound around the bush-shaped auxiliary piece 30, the bottom 31 of which is provided with notches 32 for retaining the end of the strand of wires 6. The strand of wires of the stator is wound onto the auxiliary piece 30 by driving this piece in rotation about the bearing surface 8. 
     The fourth embodiment, illustrated in FIG. 4, differs from the preceding embodiment in that the stator has a tubular extension 19 similar to the extension 16 of FIG. 2, and in that the auxiliary piece 40 is short and catches on the elastic hooks 17 by means of a bead 9&#39;. The strand of wires 6 is wound around the extension 19 by driving the auxiliary piece 40 in rotation. 
     The fifth embodiment, illustrated in FIG. 5, differs from the first embodiment shown in FIG. 1, in that the auxiliary piece 10 is replaced by an auxiliary piece 50 provided with a cylindrical inner part 51 concentric relative to the tubular outer part of the auxiliary piece. The strand of wires 6 is wound around the part 51 by driving the auxiliary piece 50 in rotation on the bearing surface 8 of the stator. 
     The sixth embodiment, illustrated in FIG. 6, differs from the first embodiment in that the stator has a cylindrical extension 22 which is coaxial with the bearing surface 8 and around which the strand of wires 6 is wound when the auxiliary piece is driven in rotation. 
     The seventh embodiment differs from the first embodiment in that the auxiliary piece 10 is replaced by an auxiliary piece 70, of which the transverse wall 71 corresponding to the wall 11 has a passage 72 for a mandrel 23, the end of which is, moreover, guided by a guide 24 formed in the stator. The strand of wires 6 is wound onto the mandrel 23 by driving the auxiliary piece 70 in rotation, and then the mandrel 23 is removed. This auxiliary mandrel makes it possible to form a regular and compact winding of the strand of wires 6. 
     FIG. 8 illustrates an eighth embodiment, in which the auxiliary piece is used as a connector. This embodiment differs from the first embodiment in that it comprises an auxiliary piece 80 provided with a nose 81, in which sockets 25 previously crimped to the ends of the strand of wires 6 are fastened before the auxiliary piece 60 catches on the stator. During the installation of the motor, the auxiliary piece 80 is detached from the stator and connected to the electrical supply. 
     FIG. 9 illustrates a stator according to the last embodiment, mounted in a tubular motor. The auxiliary 80 has been detached from the stator and connected to a supply unit 26.