JPH0545096Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a stator for electric motors used for industrial purposes, information equipment, and home appliances.

BACKGROUND OF THE INVENTION In recent years, as the prices of industrial, information, and household appliances have fallen, there has been a strong demand for lower prices by reducing the number of man-hours and simplifying the motors used in these devices. An example of a conventional stator structure of an electric motor will be described below with reference to the drawings. FIG. 8 shows a conventional stator with a thermal protector or thermal fuse (hereinafter referred to as a thermal protector) attached. In FIG. 8, 1 is a stator frame, and 2 is a yoke, which is press-fitted into the stator frame 1 after the winding frame 3 is inserted. 4 is a thermal protector that detects the temperature of the coil 10 and prevents the motor from burning out; 5 is a lead wire connected to the thermal protector 4;
The connection is covered with an insulating tube 6. 7
is a protective tape that is wrapped around the thermal protector 4 so as to bring it into close contact with the coil 10 wound around the winding frame 3.

Problems to be Solved by the Invention However, in the above configuration, since the thermal protector 4 is installed on top of the coil 10, the height of the winding frame 3 becomes high, and the connection part between the coil 10 and the thermal protector 4 increases. This requires an insulating tube 6 and a protective tape 7 for fixing the thermal protector, which poses a problem in that the number of parts and the number of assembly steps increase.

Means for Solving the Problems In view of the above problems, the present invention provides an opening groove for inserting a thermal protector at the end of one side of the winding frame, and a printed circuit board for connecting the thermal protector and the coil. is attached in contact with the end of the winding frame, and a thermal protector is fixed in the opening groove.

Effects Due to the above-described configuration, the present invention eliminates the need for an insulating tube at the connection between the thermal protector and the coil, a protective tape for fixing the thermal protector, and also eliminates the need to place the thermal protector on the top surface of the coil. Therefore, the height of the winding frame can be reduced.

Embodiment A stator for an electric motor according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a structure in which a stator frame, a yoke, and a winding frame with wires are assembled in an embodiment of the present invention;
FIG. 2 is a side view of FIG. 1. In FIGS. 1 and 2, 1 is a stator frame, and 2 is a yoke, which is press-fitted into the stator frame 1. 3 is a winding frame around which the coil 10 is wound, and is inserted into the yoke 3. 3a is an opening groove provided at the end of one side of the winding frame 3 in which the thermal protector 4 is housed;
3b is a pin terminal press-fitted into the winding frame 3.

FIG. 3 is a plan view of the winding frame, and FIG. 4 is a front view. In the figure, 3c is a yoke insertion portion, and 3d is a hole for press-fitting a pin terminal.

5 and 6 show a printed circuit board 9, in which connection lead wires and lead wires 5 of the thermal protector 4 are connected to terminal holes 8a provided in the copper foil 8. FIG. 7 is a side view of the stator, showing a state in which the printed circuit board 9 is soldered to the pin terminal 3b of the winding frame 3, and the thermal protector 4 is inserted and attached to the opening groove 3a of the winding frame 3. be.

To explain the assembly of the stator of the electric motor configured as above, the coil 10 is wound around the winding frame 3 shown in FIGS. 3 and 4, and its terminals are shown in FIGS. 1 and 2. After soldering to the pin terminal 3b, the winding frame 3
is inserted into the yoke 2, and then this yoke 2 is press-fitted into the stator frame 1, resulting in the structure shown in FIGS. 1 and 2.

In the printed circuit board 9 shown in FIGS. 5 and 6, after the lead wire 5 and the thermal protector 4 are soldered, the pin terminals 3b of the winding frame 3 are soldered to the terminal holes 8a of the printed circuit board. The structure is shown in Figure 7.

As described above, according to this embodiment, the opening groove 3a for inserting the thermal protector 4 is provided at the end of one side of the winding frame 3, and the lid of the opening groove 3a is formed in contact with the end of the winding frame. By providing a printed circuit board 9 that protects the thermal protector 4 and the coil 10,
The number of man-hours and parts for connecting the wires and fixing the thermal protector 4 can be reduced, and by inserting the thermal protector 4 into the opening groove 3a of the winding frame 3, the height of the winding frame 3 can be reduced.

Effects of the invention As described above, the present invention provides an opening groove for accommodating a thermal protector at the end of one side of the winding frame in the stator of an electric motor, and forms a cover for the opening groove with a printed circuit board. , the number of man-hours required to connect the thermal protector and coil can be reduced.
Furthermore, since the height of the winding frame to which the thermal protector is attached can be reduced, it is possible to achieve the effect of realizing a lower price and smaller size of the electric motor.

[Brief explanation of the drawing]

1 and 2 are a plan view and a side view of a stator frame yoke and a winding frame assembled with the stator frame yoke according to an embodiment of the present invention, and FIG.
4 is a front view, FIG. 5 is a plan view of the printed circuit board, FIG. 6 is a side view, and FIG. 7 is a plan view of the winding frame of the example shown in the figure. FIG. 8 is a side view of a stator in which the winding frame is assembled and a printed circuit board is further fixed by soldering, and FIG. 8 is a plan view showing a state in which a thermal protector is attached to a conventional stator. 1...Stator frame, 2...Yoke, 3...
... Winding frame, 3a... Opening groove, 4... Thermal protector, 9... Printed circuit board, 10... Coil.

Claims (1)

[Scope of utility model registration request] It includes a stator frame, a yoke fixed to the stator frame, a winding frame fitted and inserted into the yoke, and a coil wound around the winding frame, and has an opening at one end of the winding frame. a thermal protector is provided in the opening groove, the thermal protector is electrically connected to the coil, and the thermal protector is attached to an end of the winding frame to form a lid for the opening groove. Electric motor stator with printed circuit board.