JPS5818458Y2 - electric machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stator for a small generator or electric motor.

The proportion of the stator in this type of small rotating electric machine is large in terms of the number of parts and manufacturing man-hours.

Therefore, there are great expectations in the industry to simplify this stator and reduce the number of manufacturing steps.

The proportion of the stator in an electric motor is not only high in material costs, but also requires a lot of time and effort in electrical work such as coil terminal treatment.

Further analysis of this electrical work includes: (1) Formation of the stator core (2) Insertion of the coil into the slot of the stator core (3)
Coil terminal processing (4) Connection processing between the coil terminal and external lead wire (5)
Insertion of insulation between layers or stages (6) Binding process of lead wires with threads, etc.

Regarding (1) and (2) above, automatic assembly and winding machines can automatically perform the assembly or winding work, so there is no need for manual work by the operator. Time is not a big issue either.

However, (3), (4), (5), (6)
Because the lead wires and coil terminals are in a state where they can move freely, automated electrical work cannot be performed by machines due to inaccurate positioning, softness of the material, and easy damage to the coil coating, and the old method still remains. This was a task that relied on manual labor.

Further, it is very troublesome to work with the terminals of the coils and lead wires attached to the stator, and the assembly work requires a great deal of labor and time.

These processes are very important parts that can be called the heart of electrical machines, but incomplete connections or loose connections can cause accidents.
Improvements in these areas are desired.

The present invention was developed with attention to the above points, and is aimed at automating coil terminal processing in a stator of a rotating electric machine having a relatively small capacity.

The purpose of the present invention is to provide an optimal terminal connection configuration so as to completely automate coil terminal processing.

First, prior to explaining the present invention, the prior art shown in FIG. 1 will be explained.

In this drawing, the housing, armature, etc. are omitted to simplify the explanation, and only the stator portion is shown.

In the drawing, 100 is a stator core formed by laminating silicon steel plates, and some parts of the outer periphery are welded by Chig welding.
Welded as in 1 to prevent each laminate from separating.

Reference numeral 102 denotes a plurality of slots formed in the stator core 100, into which the main and auxiliary coils 103 and 104 are wound via a slot insulating member 105.

106 is the coil terminal of the main or auxiliary coil 103, 104, and the external lead wire 10 is connected inside the insulating tube 107.
It is electrically connected to 8.

109 is a strong thread that commonly binds the coil ends of the main and auxiliary coils 103 and 104.
Insulating tube 107 described above when bundling 3,104
It must also be firmly and securely attached to the coil end.

Note that 110 is an external lead wire when a centrifugal force on/off switch, a capacitor, etc. are used.

According to this prior art, the main steps are to electrically connect the coil terminal 106 to the external lead wire 108, to cover the connection point with the insulating tube 107, and to use the thread 109.
It is necessary to commonly bind the auxiliary coils 103, 104 and the insulating tube 107, but all three tasks require skilled labor as the objects to be worked on must always be able to move freely and are easily damaged. This was something that several workers spent a lot of time doing.

Therefore, the product has very low productivity.

In addition, the coil was deformed due to the tightening work performed on the coil end, and a final shaping process was required.

The present invention has been devised in view of the above-mentioned drawbacks of the conventional apparatus, and the structure of the present invention will be explained below based on an embodiment shown in the drawings.

FIG. 2 is a perspective view of a stator showing one embodiment of the device of the present invention.

In the drawings, reference numeral 1 denotes a stator core similar to the conventional example.

3 is a main coil wound around a slot (not shown) of the stator core 1. As shown in FIG.

Reference numeral 10 denotes an electrical intermediate member composed of hard electric wires used for general household use or outdoor power transmission. Three electrical intermediate members 10 are held by a support 11, and are It is fixed to the end face of the stator core 1.

This support 11 is divided into two parts, and the three electrical intermediate members 10 are held between the support 11A and the lower support 11B.

The support 11 is made of a steel plate, and the electrical intermediate member 10
After sandwiching the lower support 11B, attach it to the stator core 1.
It is fixed by welding to the outer periphery of the

Thereby, the electrical intermediate member 10 is held securely and firmly on the stator core 1.

At the end of the electrical intermediate member 10, a bent part 12 is formed outside the coil end part so as to protrude in the axial direction of the motor, and the insulating coating is peeled off from the end face as shown in FIG. However, a flat surface 12A is formed on the end surface of the conductor.

Furthermore, a groove 12B is formed in the middle part of this plane 12A,
The coil end 6 is inserted into this groove 12B as shown in FIG. 4, and then spot welded as shown in FIG. 5.

Therefore, the coil terminal 6 and the electrical intermediate member are electrically firmly connected.

Further, the other end of this electrical intermediate member 10 is bound by a support 11 and arranged in parallel in the radial direction, and a connector 14 is connected to an end 13 protruding from this support 11.

Further, this connector 14 is connected to the external lead wire 8.

The connection between the electrical intermediate member 10 and the coil terminal 6 is as shown in FIG.
The insulation coating of 0 is wrapped around the peeled conductor part and then insulated with a heat-shrinkable insulation tube 127, or as shown in FIG. This is done by holding the coil terminal 6 between the holding portions 15A of the terminal 15 fitted into the holding portions 15A of the terminals 15.

As described above, according to this embodiment, the electrical intermediate member can be formed of a hard conductive wire, resulting in low cost, and the connector can also be formed at the same time, making it highly suitable for mass production.

As described above, according to the present invention, the coil end of the coil housed in the slot of the stator core and the external lead wire are connected via the electrical intermediate member fixed to the end face of the stator core, and this electrical intermediate member is fixed to the end face of the stator core via a support, and the electrical intermediate member is formed of a hard conductive wire, and one end of the electrical intermediate member is connected to the outside of the coil end portion near the lead-out portion of the coil terminal. By making the coil protrude in the axial direction, it is possible to easily connect the electrical intermediate member and the coil terminal, and to provide a stator that is highly suitable for mass production.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the stator section of a conventional device, FIG. 2 is a perspective view of the stator section showing an embodiment of the present invention, FIG. 3 is an enlarged view of the tip of the electrical intermediate member, and FIG. The figure shows the coil end inserted into the groove at the tip, Figure 5 shows the connection by spot welding, Figure 6 shows the connection part covered with a heat-shrinkable tube, and Figure 7 shows the terminal. FIG. 1... Stator core, 3... Coil,
6... Coil terminal, 10... Electrical intermediate member, 11... Support tool.

Claims (1)

[Claims for Utility Model Registration] A stator core made of laminated steel plates, a plurality of slots formed in the stator core, a plurality of coils housed in these slots, and coil terminals drawn out from these coils. , comprising an electrical intermediate member fixed to an end surface of the stator core, and an external lead wire for supplying power to the coil from the outside through the electrical intermediate member, wherein the electrical intermediate member has an insulating coating. The end of each conductive wire is bent in the axial direction, the insulation coating is peeled off from the tip of each conductive wire, and these conductive wires are commonly tied and fixed with a support. A part of the support is fixed to the outer periphery of the stator core, and the coil terminals are electrically connected to the peeled portions of the insulation coating of each of the conductive wires, and the coil terminals are bound by the support and are juxtaposed and protruded outward. A stator for a rotating electric machine, characterized in that an external lead wire is connected to each end of the conductive wire.