JPH0442891B2 - - 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. The present invention aims to solve these conventional drawbacks.

[Means for solving problems]

To achieve the above object, the present invention provides an electric motor drawer 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. The wire fixing device has a pair of end plates made of electrically insulating material attached to both ends of the stator core, and a cap for fixing the lead wire to the end plates, and one end plate has a cap on the inner edge side thereof. An engaging claw piece is provided upright at a predetermined location, and a lead wire insertion hole is formed at a position on the back side of the engaging claw piece so as to communicate with the gap, and the cap is provided with a lead wire insertion hole, which is connected to the drawer. A connecting portion storage hole for storing a connecting portion between the wire and the stator winding, and an engaging member that engages with the engaging claw piece are provided, and the cap is provided with a connecting portion housing hole that accommodates the connecting portion between the wire and the stator winding, and an engaging member that engages with the engaging claw piece. It is characterized in that the storage hole is mounted on the end plate so as to be eccentric with respect to the insertion hole.

[Effect]

With the above-described structure, by attaching the cap to the end plate, the lead wire is firmly held in a bent state between the insertion hole and the connecting portion storage hole.

〔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 when it is housed in the cylindrical bracket 4, an arcuate gap G is formed between it and the inner wall surface. Further, although only a portion is shown in FIG. 2, this stator core 1 is provided with, for example, six blade portions 2 and the same number of slots 3. 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. Referring also to FIG. 3, each end plate 5a, 5b has a blade cover corresponding to the blade part 2 of the stator core 1. Blade part 2 of stator core 1
Protruding winding guides 6a and 6b are provided to prevent wire leakage when winding the stator winding, and inner edge sides of the same end plates 5a and 5b corresponding to the slot 3 portion of the stator core 1 are provided. A plurality of wire guides 7a and 7b are erected on the shaft and serve as guides for wires connecting predetermined stator windings. Further, each end plate 5a, 5b is installed over the yoke portion of the stator core 1 between an insulating cover 8a, 8b inserted into the slot 3 along its inner wall surface, and the insulating cover 8a, 8b. It has leg plates 9a and 9b formed as follows.

At one end 5a, a predetermined crossing guide 7
A claw 11 is formed at the upper end of a, and for convenience of explanation, this predetermined wire transfer guide 7a will be hereinafter referred to as an engaging claw piece. For example, three lead wire insertion holes 10 communicating with the gap G formed between the flat surface 1a of the stator core 1 and the bracket 4 are bored in the rear side portion of the engaging claw piece 7a. ing.
Corresponding to the insertion holes 10, three lead wire engagement grooves 12 are similarly formed in the other end plate 5b. One end of each lead wire 13 is led out to the end plate 5a side through the insertion hole 10, connected to the lead portion of the stator winding 14, and fixed to the end plate 5a by a cap 15.

Referring also to FIG. 4, the cap 15 is provided with, for example, three connection portion storage holes 16 for storing the connection portions between the lead wire 13 and the stator winding 14. A stator winding 14 is provided at each lower end of this connection housing hole 16.
A notch groove 17 for drawing out the material laterally is provided continuously. Further, a U-shaped engagement frame 18 is provided on the side surface of the cap 15 so as to engage with the engagement claw piece 7a. That is,
The cap 15 is attached to the end portion 5a via the engagement frame 18 and the engagement claw piece 7a, but in this case, the cap 15 is attached to the connection portion storage hole 16.
is held eccentrically with respect to the insertion hole 10,
As a result, the lead wire 13 is fixed between the insertion hole 10 and the connecting portion storage hole 16 in a bent state as shown in FIG. In this embodiment, in order to further strengthen this fixed state, guide ribs 19 are formed on the end plate 5a to restrict the mounting position of the lower end of the cap 15, and on both sides of the cap 15, guide ribs 19 are formed. Spacers 20, 20 are formed to maintain a constant distance from the mating claw pieces 17a.

The other end of the lead wire 13 fixed by the cap 15 as described above is held in the engagement groove 12 of the end plate 5b, and the stator core 1 is held in the bracket 4.
The gap G that is formed between the
The bracket 4 is disposed inside the bracket 4, and is pulled out through an opening 21 provided, for example, on the side surface of the bracket 4.

〔effect〕

As is clear from the description of the embodiments described above, according to the present invention, the lead wires are routed using the gap formed between the stator core and the bracket, and then the stator windings are connected to the upper part of the end plate. connection,
Since the connection part is fixed with a cap, there is no need to insert the connection part into the slot after winding the stator windings as in the conventional case, that is, regardless of the size of the space factor of the stator windings. The lead line can always be securely fixed. In addition, the fixing work is simply to cover the cap with a cap, and the work efficiency is good and the effect is remarkable.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an embodiment of the present invention, Fig. 2 is a plan view of the main part of the same embodiment, Fig. 3 is a sectional view of the main part of the embodiment, and Fig. 4 is the same as Fig. 1. FIG. 2 is a perspective view of the illustrated cap as seen from a different direction from the same figure; In the figure, 1 is a stator core, 1a is a flat surface, 2 is a blade part, 3 is a slot, 4 is a bracket, 5a, 5
b is an end plate, 6a, 6b are winding guides, 7a, 7b
1 is a wire guide, 10 is a lead wire insertion hole, 11 is a pawl, 12 is an engagement groove, 13 is a lead wire, 14 is a stator winding, 15 is a cap, 16 is a connection storage hole,
18 is an engagement frame, 19 is a guide rib, and 20 is a spacer.

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 electrically insulating material attached to both ends of the stator core, and a cap for fixing a lead wire to the end plates, and one end plate has a cap that stands at a predetermined position on the inner edge side of the end plate. An engaging claw piece is provided, and a lead wire insertion hole is formed at a position on the back side of the engaging claw piece so as to communicate with the gap, and the cap is provided with a lead wire insertion hole for communicating with the lead wire and the stator. A connection part storage hole for storing a connection part with the winding, and an engagement member that engages with the engagement claw piece are provided, and the cap is connected to the above-mentioned cap through the engagement member and the engagement claw piece. The storage hole is mounted on the end plate so as to be eccentric with respect to the insertion hole, and the lead wire is fixed in a bent state between the insertion hole and the storage hole, and is inserted into the bracket through the gap. A leader wire fixing device for an electric motor, characterized in that the wire is drawn out to the outer periphery of the motor. 2. The electric motor lead wire fixing device according to claim 1, wherein the other end plate is formed with an engagement groove for engaging and holding the lead wire. 3. The electric motor lead wire fixing device according to claim 1, wherein a guide rib is formed on the outer edge side of the one end plate to regulate the attachment position of the cap. 4. The electric motor lead line fixing device according to claim 1, wherein the engaging member comprises a U-shaped frame formed on a side surface of the cap. 5. The electric motor lead wire fixing device according to claim 1, wherein the cap is provided with a spacer that comes into contact with the back surface of the engaging claw piece and maintains a constant distance therebetween. 6. In claim 1, the end plate has a blade cover corresponding to the blade part of the stator core, and the edge part of the blade cover has a cover for winding the stator winding around the blade part. A protruding winding guide is provided to prevent wire leakage, and on the inner edge side of the end plate corresponding to the slot portion of the stator core, a guide for a transition wire connecting the stator windings to each other is provided. Multiple crossing guides will be erected, and
A lead wire fixing device for an electric motor, characterized in that one of the wire guides is used as the engaging claw piece.