JPH0723011Y2 - Lead wire connection device for rotating electric machine stator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a rotary electric machine stator lead wire connection device for connecting a coil end portion and a lead wire of the rotary electric machine stator. Regarding

(Prior Art) Conventionally, in a rotary electric machine stator, there is a structure in which a coil is wound around a bobbin having flanges at both ends of a body and the bobbin is inserted into a core. Among these, there is one in which the connection structure between the coil end and the lead wire is as shown in FIGS. 4 and 5. In both of these figures, reference numeral 1 is a bobbin which is inserted into a core (not shown) and which has collar portions 3 and 4 at both ends of the body portion 2. A coil end insertion groove 5 is formed on one of the flanges 3, and wall portions 6 are formed opposite to both edge portions of the groove 5, and the wall portions 6 and 6 are provided with an opening. A connection board portion 8 having an outgoing wire insertion hole 7 is formed.

Thus, the core wire 9a of the lead wire 9 is passed through the lead wire insertion hole 7 from the bottom to the top, and the end portion (winding start end portion) 10a of the coil 10 is pulled in the coil end insertion groove 5 with a slight tendency. To the core wire 9a, and bend the connecting portion A toward the coil insertion groove 5 side to form the wall portion.
It is arranged to be housed between 6 and 6. The reason why the connecting portion A is bent is to prevent the connecting portion A from being in an upright state, which may result in poor assembling workability and injury during the work. The reason why the bending direction is directed to the coil end insertion groove 5 side is to prevent the breakage by loosening the coil end 10a, which was slightly stretched.

(Problems to be solved by the invention) By the way, in order to ensure the connection between the core wire 9a of the lead wire 9 and the coil end portion 10a, the protrusion length from the core wire 9a to the connection base portion 8 should be increased. However, in the above structure,
When the connecting portion A is bent, the connecting portion A comes close to the coil 10 from above through the coil end insertion groove 5, which causes an insufficient insulation distance between the coil 10 and the connecting portion A. there were. Further, due to this, there is a drawback that the number of turns of the coil 10 is restricted and the number of turns cannot be increased. Furthermore, when the coil end 10a is loosened, the coil end 10a may loosen toward the coil 10 side.
The potential difference between the coil end portion 10a and the coil 10 may cause a layer short circuit.

Therefore, the object of the present invention is to sufficiently insulate the connection part from the coil, to increase the number of turns of the coil, and to prevent a layer short between the coil end part and the coil. It is possible to provide a lead wire connecting device for a rotating electric machine stator.

[Structure of the Invention] (Means for Solving the Problems) The present invention relates to a rotating electric machine stator in which a coil is wound around a bobbin having flanges at both ends of a body and the bobbin is inserted into a core. In the coil end insertion groove formed in the one flange portion of the bobbin, and one end portion in the coil end insertion groove formed along the outer surface of the one flange portion. A protective wall that forms a communicating lead-out groove, a connection base portion formed at the other end of the lead-out groove, and a connection base portion that is formed so as to open vertically, and the outer sheath of the lead wire is inserted through the lower portion. And a core wire insertion hole portion that is set to a diameter dimension that communicates with the outer insertion hole portion and allows only the core wire of the lead wire to be inserted therethrough. A lead wire insertion hole is provided, and the lead wire having the core wire exposed at the tip is passed through the lead wire insertion hole from below to move the lead wire in front. The core wire of the lead wire and the coil end are connected above the connection base while projecting upward from the connection base, and the coil end is passed through the coil end insertion groove and the lead-out groove. It is characterized in that it is bent inwardly at one end side and is accommodated in the lead-out groove.

(Operation) When the lead wire is inserted into the lead wire insertion hole of the connection base portion from below, the insertion of the outer cover of the lead wire is restricted by the upper end of the outer cover insertion hole portion, and as a result, the core wire is inserted into the connection base portion. The position of the core wire is reliably positioned, and the protruding length of the core wire from the connection base is regulated to be constant. Therefore, the connection is simple, there is no excess or deficiency in the connection length, and further, since the connection portion does not become long, the connection portion does not protrude from the lead-out groove. The connecting portion that connects the core wire and the coil end portion is bent inward of the lead-out groove along the outer surface of the collar portion of the bobbin and accommodated in the lead-out groove. The isolation is ensured via the part, so that there is sufficient insulation between the connection and the coil. Further, since the connecting portion does not approach the coil from above, the number of coil turns can be increased. Further, by bending the connecting portion inward of one end of the lead-out groove, that is, inward of the coil end insertion groove, the coil end is naturally loosened to prevent disconnection. Also in this case, since the end portion of the coil is reliably separated from the coil by the collar portion, no layer short circuit occurs.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

First, in FIG. 3, 11 is a core, which is a yoke portion 12.
And a tooth portion 13 fitted to this. 14 is a bobbin made of electrical insulating material such as synthetic resin.
15 (see FIG. 1) and the collar portions 16 and 1 formed at both ends thereof.
7 and. Reference numeral 18 denotes a coil, which is wound around each bobbin 14 and is mounted on the teeth portion 13 of the core 11 together with the bobbin 14. 19 is a pin support base formed on the collar portion 17 of each bobbin 15, 20 is a connection pin erected on each pin support base 19,
The coil end portion 18a of the coil 18 is connected to the connection pin 20, and the connection wire 21 is connected. Reference numeral 22 is a lead wire, which is formed by covering the core wire 22a with an outer cover 22b.

Next, referring to FIGS. 1 and 2, a coil end insertion groove 23 is formed in a slit shape in one flange portion 16 of the bobbin 14 and one edge portion of the coil end insertion groove 23 is formed. And a protective wall 24 that is continuous with and extends along the outer surface of the collar portion 16. A lead-out groove 25 having one end communicating with the coil end insertion groove 23 is formed by the protective wall 24 and the flange 16. Then, at the other end of the lead-out groove 25, a connection base portion 27 having a lead wire insertion hole 26 that opens in the vertical direction is formed. The output wire insertion hole 26 has an outer insertion hole portion 26a having a diameter dimension that allows the outer cover 22b of the output wire 22 to be inserted in the lower portion, and communicates with the outer insertion hole portion 26a in the upper portion. The core wire insertion hole portion 26b is set to have a diameter dimension that allows only the core wire 22a of the lead wire 22 to be inserted.

The lead wire 22 having the tip end portion of the core wire 22a exposed by a predetermined length is inserted into the lead wire insertion hole 26 from below, and
b is inserted into the outer insertion hole portion 26a, and the core wire 22a is inserted through the core wire insertion hole portion 26b and protrudes upward from the connection base portion 27. In this case, the insertion of the jacket 22b is restricted by the upper end of the jacket insertion hole portion 26a, as a result, the core wire 22a is reliably positioned by the connection base portion 27, and the core wire 22a protrudes from the connection base portion 27. The length is fixed. Also, the coil end of the coil 18
18b (winding start end) is wound and connected to the core wire 22a of the lead wire 22 through the coil end insertion groove 23 and the lead-out groove 25. The connecting portion B is bent inward toward the coil end insertion groove 23 side and accommodated between the protective wall 24 and the collar portion 16.

According to this embodiment having the above-mentioned configuration, when the lead wire 22 is inserted into the lead wire insertion hole 26 of the connection base portion 27 from below, the jacket of the lead wire 22 is covered.
The insertion of 22b is restricted by the upper end of the outer insertion hole portion 26a, and as a result, the core wire 22a can be reliably positioned by the connection base portion 27,
Further, the protruding length of the core wire 22a from the connection base portion 27 can be regulated to be constant. Therefore, the connection is simple, there is no excess or deficiency in the connection length, and further, since the connection portion B does not become long, the connection portion B may protrude from the lead-out groove 25. Absent. Further, the connecting portion B between the lead wire 22 and the coil end portion 18b is bent inward of the lead-out groove 25 along the outer surface of the collar portion 16 of the bobbin 14 and accommodated in the lead-out groove 25. From
The connecting portion B is the coil 18 and the collar portion 16 existing in the body portion 15 of the bobbin 14.
Is reliably isolated via
The insulation between 18 and can be sufficient. Further, since the connecting portion B does not approach the coil 18 from above, the number of turns of the coil 18 can be increased. Further, by bending the connecting portion B inward of one end of the lead-out groove 25, the coil end portion 18b is naturally loosened to prevent disconnection. in this case,
Since the coil end portion 18b in a loose state is located in the lead-out groove 25 existing outside the collar portion 16, the coil end portion 18b is also reliably separated from the coil 18, and as a result, no layer short circuit occurs.

[Effect of the Invention] As is apparent from the above description, the present invention can obtain the following effects.

(A) The lead wire insertion hole of the connection base portion, and the outer jacket insertion hole portion having a diameter dimension that allows the outer jacket of the lead wire to be inserted therethrough,
Since the upper portion is formed so as to have a core wire insertion hole portion communicating with the outer insertion hole portion and having a diameter dimension capable of inserting only the core wire of the lead wire, the lead wire insertion hole of the connection base portion is formed. When the lead wire is inserted from below, the insertion of the jacket of the lead wire is restricted by the upper end of the outer jacket insertion hole, and as a result, the core wire can be reliably positioned in this connection base part, and moreover, the connection base part The protruding length of the core wire from the can be regulated to be constant. As a result, the connection is simple, there is no excess or deficiency in the connection length, and further, since the connection portion does not become long, the connection portion does not protrude from the lead-out groove.

(B) The connection portion between the core wire of the lead wire and the coil end portion is bent inward of the lead-out groove along the outer surface of the collar portion of the bobbin so as to be housed and arranged in the lead-out groove. The part is reliably separated from the coil existing in the body part of the bobbin via the collar part, and as a result, sufficient insulation between the connection part and the coil can be achieved. Further, since the connecting portion does not approach the coil from above, the number of turns of the coil can be increased.

(C) Further, the coil end lead-out groove is provided on one end side of the lead-out groove, and the connection base portion is provided on the other end side, and the connection portion in the connection base portion is inwardly directed to the one-end side of the lead-out groove. By bending, it is possible to naturally loosen the coil end and prevent disconnection. In this case, since the loose coil end is located in the lead-out groove existing outside the flange, the coil end is also reliably separated from the coil, and as a result, a layer short circuit does not occur.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention. FIG. 1 is a perspective view of a main part, FIG. 2 is a longitudinal sectional view of the same, FIG. 3 is an overall plan view, and FIG. FIG. 5 and FIG. 5 are diagrams corresponding to FIG. 1 and FIG. 2, respectively, showing a conventional example. In the figure, 11 is a core, 14 is a bobbin, 15 is a body, 16 and 17 are flanges, 18 is a coil, 18b is a coil end, 22 is a lead wire, 22a is a core wire, 22a is a core wire, 22b is a jacket, and 23 is Coil insertion groove, 24 is protective wall, 25
Is a lead-out groove, 26 is a lead wire insertion hole, 26a is an outer insertion hole portion, 26b
Is a core wire insertion hole portion, 27 is a connection base portion, and B is a connection portion.

Claims (1)

[Scope of utility model registration request] 1. A rotating electric machine stator comprising a bobbin having flanges at both ends of a body and a coil wound around the bobbin and the bobbin being inserted into a core. The bobbin is formed on one flange of the bobbin. A coil end insertion groove, a protective wall that is formed along the outer surface of the one flange, and forms a derivation groove whose one end communicates with the coil end insertion groove; and the derivation groove A connecting base portion formed on the other end of the connecting base portion, and an outer cover insertion hole portion formed to open vertically in the connecting base portion and having a diameter dimension that allows the outer cover of the lead wire to be inserted into the lower portion. A lead wire insertion hole having a core wire insertion hole portion having a diameter dimension which is communicated with the outer jacket insertion hole portion and has only a core wire of the lead wire inserted therethrough, and the lead wire insertion hole A lead wire whose core is exposed at the tip is passed through the hole from below so that the core wire is projected upward from the connection base, and The core wire of the lead wire and the coil end are connected above the connection base by passing the coil end through the end insertion groove and the lead-out groove, and bending the connection inward toward one end of the lead-out groove. A lead wire connection device for a rotating electric machine stator, wherein the lead wire connection device is housed in the lead-out groove.