JPH05328654A - Lead device of electric motor - Google Patents

Abstract

PURPOSE:To facilitate connection between a magnet wire of a stator coil and an external lead wire by providing a connection band for reduced so that the outer-periphery surface of an entire coil end is equal to a specified outer diameter. CONSTITUTION:The outer-periphery surface of the lower entire coil ends 6b which are laid out adjacently is reduced by a connection band 10 to reduce the outer diameter of the lower coil end 6b as compared with the outer- periphery surface of a stator core 1 and at the same time to increase the inner diameter of the upper coil end as compared with the innerperiphery surface of the stator core 1. Also, a plurality of relay terminals 11 protrude on the outer-periphery surface of the connection band 10 while they are separated, a magnet wire 4 of a stator coil 3 is led out so that the winding start and end do not cross each other, and then an external lead wire 12 is connected to each relay terminal 11, thus firmly fixing the relay terminal 11 to the lower coil end 6b and facilitating connection of the magnet wire 4 and the lead wire 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor lead-out device for electrically connecting a stator coil wound around a stator of a small electric motor to the outside.

[0002]

2. Description of the Related Art Generally, in a conventional small electric motor having an output of 0.75 kW or less, a lead wire having a mechanically sufficient strength is electrically connected to a magnet wire having an enamel insulating film forming a stator coil. , This is connected to the external power supply of the electric motor. It is important for this lead wire to have a particularly high mechanical strength, and the lead wire should be firmly attached to the coil end, or a terminal block as disclosed in JP-A-63-56145 should be fixed to the stator core. The method of forming is adopted.

[0003]

However, the former is to strongly tie the lead wire with a thread to the coil end,
There were many problems with electrical insulation, and many man-hours were required.
In the latter case, the terminal block becomes dimensionally large if the insulation dimension is set to a predetermined value, and moreover the material cost for manufacturing is also large.

The present invention eliminates such drawbacks.

[0005]

SUMMARY OF THE INVENTION An electric motor lead-out device according to the present invention comprises a connecting band for surrounding the outer peripheral surfaces of the entire coil ends of a stator coil which are adjacent to each other and tightening the outer peripheral faces to a predetermined outer diameter. It is characterized in that it comprises a plurality of relay terminals provided in this connection band, and the magnet wire and the external lead wire of the stator coil are connected to each other to the relay terminal.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 are an inverted perspective view and an inverted vertical front view of a stator portion to which an electric motor lead-out device according to the present invention is applied, wherein 1 is an annular stator core and 2 is this stator core 1 A plurality of slots 3 formed on the inner peripheral surface of the main coil 3a and the auxiliary coil 3 inserted in the slots 2.
b is a stator coil, 4 is a magnet wire forming the stator coil 3, 5 is a slot insulator inserted between the slot 2 and the stator coil 3, and 6a and 6b are stator core 1 respectively. The coil end of the stator coil 3 which protrudes up and down is shown.

FIG. 3 shows an electric circuit diagram of the electric motor, in which 7 is an external power source and 8 is a capacitor.

The stator coil 3 is wound on a winding form in advance and then set on the blade of the coil insertion device 9 as shown in FIG. 4 and inserted into the slot 2. In this insertion state, as shown in FIG. Thus, the upper coil end 6a is contracted radially inward of the stator core 1, and the lower coil end 6b is expanded outward. Since such a shape is unsuitable for a stator coil of an electric motor, the inner diameter of the outer coil end 6a is made larger than the inner peripheral surface of the stator core 1 by the shaping process, and the outer diameter of the outer coil end 6b is set to the stator. It is necessary to make the diameter smaller than the outer peripheral surface of the core 1.

Therefore, in the present invention, the outer peripheral surface of the entire lower coil end 6b, which is arranged adjacent to each other, is tightened by the strip-shaped connecting band 10 made of an electric insulator as shown in FIG. The outer diameter of the side coil end 6b is made smaller than the outer peripheral surface of the stator core 1 by a predetermined value, and the inner diameter of the upper coil end 6a is made larger than the inner peripheral surface of the stator core 1 by an arbitrary shaping process. Spread it out.

Further, in the present invention, the above-mentioned connecting band 10
A plurality of relay terminals 11 are provided on the outer peripheral surface of the stator so as to be spaced apart from each other, and are drawn out so that the winding start and the winding end of the magnet wire 4 of the stator coil 3 do not cross each other.
Each of the relay terminals 11 is connected to the corresponding one, and each of the relay terminals 11 is connected to a lead wire 12 that connects to a power source 7 and a capacitor 8 outside the motor as shown in FIGS.

In order to tighten the outer peripheral surface of the lower coil end 6b by the connection band 10, for example, as shown in FIG. 6, a rectangular hole 13 is formed in one end of the connection band 10 and the other end is formed in the rectangular hole 13. As the insertion portion 14 having a width that can be inserted,
A serrated portion 15 for preventing loosening is formed on both sides of the insertion portion 14, and the serrated portion 15 is formed in the rectangular hole 13 at an arbitrary position.
To be able to hang on.

When the relay terminal 11 may come into contact with the outer surface of the lower coil end 6b, the terminal insulator 16 is interposed between the two as shown in FIG.

[0014]

Since the lead-out device for an electric motor of the present invention has the above-described structure, if the outer diameter of the lower coil end 6b is shaped to a desired value by the connecting band 10, the tightening force of the connecting band 10 simultaneously causes it. Since the relay terminal 11 can be firmly fixed to the lower coil end 6b, its setting and the connection of the magnet wire 4 and the lead wire 12 are extremely easy. Further, the pressure when the connection band 10 tightens the lower coil end 6b is sufficient within the pressure range of the shaping process which has been conventionally performed, and the connecting portion of the lead wire connected to the magnet wire 4 is conventionally connected. Since it is not necessary to firmly bind the coil end with a thread, there is no possibility that the insulating film of the magnet wire at the coil end will be damaged by the mechanical stress in this part, thus eliminating the factors such as layer shorts. There is.

[Brief description of drawings]

FIG. 1 is an inverted perspective view of a stator portion to which a lead-out device for an electric motor according to the present invention is applied.

FIG. 2 is an inverted vertical cross-sectional front view of a stator portion to which the output device for an electric motor according to the present invention is applied.

FIG. 3 is an electric circuit diagram of an electric motor.

FIG. 4 is an explanatory diagram of a coil insertion device.

FIG. 5 is an explanatory diagram of a stator coil.

FIG. 6 is an enlarged perspective view of a connection band in the lead-out device for an electric motor according to the present invention.

[Explanation of symbols]

 1 Stator Core 2 Slot 3 Stator Coil 3a Main Coil 3b Auxiliary Coil 4 Magnet Wire 5 Slot Insulator 6a Coil End 6b Coil End 7 External Power Supply 8 Capacitor 9 Coil Insertion Device 10 Connection Band 11 Relay Terminal 12 Lead Wire 13 Rectangular Hole 14 insertion part 15 serrated part 16 terminal insulator

Claims (1)

[Claims] 1. A connection band for surrounding and tightening an outer peripheral surface of all the coil ends of a stator coil adjacent to each other so as to have a predetermined outer diameter, and a plurality of relay terminals provided on the connection band. And a magnet wire of the stator coil and an external lead wire are connected to the relay terminal.