JPH0442892B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a lead wire fixing device for an electric motor,
More specifically, the present invention relates to an electric motor lead wire fixing device in which a stator winding is directly wound around a stator core using a winding machine.

[Conventional example]

Generally, lead wires serving as external leads are soldered to the stator windings of an electric motor, but in this case, it is necessary to fix the connecting portion to a predetermined location. For this reason, in the past, for example,
As disclosed in No. 159164, a storage part for inserting the connection part of the lead wire and the stator winding is formed in a holder installed over the yoke part of the stator core, and this storage part is used for inserting the connection part of the stator winding. It is inserted into the slot after rotation. Furthermore, as a simpler method, an insulating tube is placed over the connection between the lead wire and the stator winding, and the tube is tied to, for example, a wire transfer guide using an insulator tie or the like.

[Problem that the invention seeks to solve]

However, according to those who use the former holder, there is no problem if the space factor of the winding in the slot is small, but if the space factor is large, the extra space in the slot becomes narrow, and the above holder The disadvantage is that there is no place to insert the storage section. On the other hand, in the latter method, it takes time and effort to cover the insulating tube and tie the insulating lock ties, resulting in poor productivity. By the way, Utsukai Showa 57-
Japanese Patent No. 95048 discloses a lead wire holding device in which an insulating support attached to a stator core is provided with a lead wire holding portion and an insertion hole into which a connection portion between the lead wire and the coil lead is inserted. According to this, it is possible to process the wire connections of the lead wire and coil lead all at once, but the basic problem is that this lead wire holding device is constructed as a separate part, so the number of parts is reduced. As the number of users increases, it takes extra work to incorporate it,
Unfavorable in terms of cost.

Further, Japanese Utility Model Application Publication No. 61-104747 discloses that storage space can be saved by storing the connection portion between the lead wire and the coil lead in a notch on the outer periphery of the stator core. However, this conventional example also has the same problems as the above-mentioned conventional example because a special type of storage case must be prepared as a separate component.

Regarding this point, Utility Model Application Publication No. 58-46243 states,
A prior art example has been disclosed in which a lead wire holding portion is integrally formed on an end plate attached to a stator core, and the lead wire is held between the lead wire holding portion and the lead wire holding portion by a presser plate. According to this, the ease of assembly work is improved, but there is a problem with the holding plate. That is, when holding the lead wire, semicircular grooves that combine to form one circle are provided on the mating surfaces of the presser plate and the lead wire holding part, and the lead wire is held within the mating grooves. However, this method cannot deal with variations in the wire diameter of the lead wires.

[Means for solving problems]

This invention was made in view of the above-mentioned conventional circumstances, and its structural feature is that a predetermined portion of the side surface is formed flat, and an arcuate gap is created between the cylindrical bracket and the inner wall surface. A device for fixing a lead wire for an electric motor having a stator core housed in a stator core, comprising: a pair of end plates made of an electrically insulating material attached to both ends of the stator core; and a presser member that presses and fixes the lead wire to the end plates. , a pedestal disposed between the mating surfaces of the brackets and sandwiched between the brackets together with the presser member, and a base disposed within the gap are integrally molded on the one end plate, and the drawer A connection storage hole is bored in the base for storing the connection between the wire and the stator winding in the base, and the base is provided with a connection storage hole for leading the lead wire out of the bracket from the connection storage hole. A guide groove having a depth substantially larger than the diameter of the lead wire is formed, and the holding member is provided with a boss that fits into the guide groove, and the lead wire is connected to the holding member. It is fixed in the guide groove by the above-mentioned guide groove.

[Effect]

According to the above configuration, the connecting portion between the lead wire and the stator winding is inserted into the base integrally molded on the end plate through the connection portion storage hole drilled in the end plate, and the lead wire is held down by the presser. In this case, the guide groove is formed to a depth substantially greater than the wire diameter of the lead wire, and there is a guide groove in the guide groove on the holding member side. Since the boss is provided to fit into, the lead wire is securely fixed even if there is some variation in the wire diameter of the lead wire.

〔Example〕

The invention will now be described in detail with reference to embodiments illustrated in the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a stator core formed by laminating magnetic plates punched into a predetermined shape. In this case, the stator core 1 has a rectangular shape with a predetermined portion of its side surface being a flat surface 1a, and an arcuate gap G is formed between it and the inner wall surface when it is housed in the cylindrical bracket 2 (see Fig. 2). reference). Although only a portion is shown in FIG. 1, the stator core 1
For example, six blade portions 3 and the same number of slots 4 are formed in the blade.

At both ends of the stator core 1, end plates 5a and 5b made of an electrically insulating material such as synthetic resin are provided. Although not shown, each end plate 5a, 5b
A winding guide for preventing wire leakage when winding the stator winding around the stator core 1 using a winding machine and a wire guide for guiding the wire are formed in the stator core 1 .

In one end plate 5a, a connection part storage hole 9 for storing a connection part 8 between the lead wire 6 and the lead of the stator winding 7 is provided in the gap G formed between the stator core 1 and the bracket 2. It is being drilled towards.
According to this invention, the base 11 and the bracket 2 disposed within the gap G are provided at a predetermined portion of the end plate 5a.
A pedestal 1 having an opening portion 12 projecting outwardly.
0 is integrally molded, and the connecting portion housing hole 9 is bored in the base portion 11. First, the lead-out portion 12 is provided with a guide groove 13 for leading out the lead wire 6. In this case, the guide groove 13 has a depth substantially greater than the wire diameter of the lead wire 6.

Further, this device includes a holding member 14 for fixing the lead wire 6 to the outlet portion 12. This presser member 14 has a guide groove 13 of the outlet portion 12.
A boss 15 is formed which fits into the guide groove 13, and this boss 15 presses and fixes the lead wire 6 to the bottom of the guide groove 13. In this case, since the guide groove 13 is formed deeper than the wire diameter of the lead wire 6 as described above, the lead wire is reliably fixed even if there is some variation in the wire diameter of the lead wire 6. The holding member 14 and the opening portion 12 are held between the mating surfaces of the bracket 2 and a cover member 16 of substantially the same shape that is assembled to the bracket 2. That is, the edge of the bracket 2 is formed with a notch 17 corresponding to the protruding portion 12, and the cover member 16 side is provided with a notch 18 that fits into the presser member 4.
The opening portion 12 and the holding member 14 are held between the notches 17 and 18. In addition, reference numeral 20 is the presser member 1
This is a claw that positions the holding member 14 in cooperation with the engagement hole 19 bored in the holding member 14.

〔effect〕

As is clear from the above description of the embodiments, according to the present invention, the end plate attached to the stator core is provided with a connection housing hole extending into the gap formed between the core and the bracket, By inserting the connecting portion between the lead wire and the fixed winding into the connecting portion storage hole, the connecting portion is not inserted into the slot after the stator winding is wound, as in the conventional case. The connection part can always be firmly held regardless of the size of the space factor of the wire. In addition, in this invention, since the pedestal having the connecting part storage hole is integrally molded on the end plate itself, the number of parts can be reduced, and the guide groove for fixing the lead wire is substantially smaller than the wire diameter of the lead wire. The guide groove is formed deeply, and a boss that fits into the guide groove is provided on the presser member side to fix the lead wire, so there may be some variation in the wire diameter of the lead wire. The lead wire can be securely fixed even if

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention, and FIG. 2 is a sectional view of essential parts of the same embodiment. In the figure, 1 is the stator core, 1a is the flat surface, 2 is the bracket, 3 is the blade, 4 is the slot, 5a, 5
b is an end plate, 6 is a lead wire, 7 is a stator winding, 8 is a connection part, 9 is a connection part storage hole, 10 is a pedestal, 11 is a base, 12 is an outlet part, 13 is a guide groove, 14 is a presser foot The members include a boss 15 and a cover member 16.

Claims (1)

[Scope of Claims] 1. A lead wire fixing device for an electric motor having a stator core whose side surface is flat at a predetermined portion and which is housed in a cylindrical bracket with an arcuate gap formed between the stator core and the inner wall surface of the stator core. , a pair of end plates made of an electrically insulating material attached to both ends of the stator core, and a holding member for pressing and fixing the lead wire to the end plates, and one of the end plates has a mating surface of the bracket. A pedestal disposed therebetween and sandwiched between the brackets together with the presser member and a base disposed within the gap are integrally molded, and a connection portion between the lead wire and the stator winding is placed within the base. A connection storage hole is bored in the pedestal for storage, and the pedestal has a depth substantially larger than the diameter of the lead wire for leading the lead wire out of the bracket from the connection storage hole. a guide groove is formed, the holding member is provided with a boss that fits into the guide groove, and the leader line is fixed in the guide groove by the holding member. Electric motor lead wire fixing device.