JP2000324745A - Mold motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the waterproofness, the dripproofness, and the rustproofness, by constituting an outer rotor brushless mold motor of a stator which is molded with resin and seals a winding coil and a lead wire coupling part with resin and a rotor part which is equipped with a magnet in the position opposed to the periphery side of the stator. SOLUTION: An outer rotor brushless mold motor is composed of a stator part 12 sealed with resin and a rotor part 13. Here, a stator 14 is equipped with a winding coil 15, and it is soldered to a printed board 16 for control having a bore larger than the bore of the stator 14. Moreover, a lead wire 17 for power supply to a motor is soldered to this printed board 16 for control. Then, the ones being coupled by soldering are molded with resin, and the soldered sections of the winding coil 15 and the lead wire 17 are sealed with resin to intercept it outside air. As a result, the motor can be given a long life by enhancing the waterproofness, the dripproofness, and the rustproofness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer rotor type brushless molded motor used under severe conditions such as outdoors and the like. More specifically, the present invention relates to a method for molding a stator portion located inside a motor with a resin material. The structure in which the rotor is arranged on the outer peripheral side of the stator is waterproof and
The present invention relates to an outer rotor-type molded motor capable of improving the drip-proof and rust-proofing power and extending the life of a low-cost and stable product.

[0002]

2. Description of the Related Art Conventionally, in a brushless molded motor, as shown in FIG. 2, an inner rotor type stator portion 2 molded and fixed with a cup-shaped resin disposed on an outer peripheral side of a rotor 1 and an inner portion thereof are provided. Rotor 1 inserted in
And a bearing 3 and a bearing holding member 4 for rotatably holding the rotor 1, and a retaining ring 5 for preventing the rotor 1 from falling off.

Further, one end of the shaft 6 of the rotor 1 is rotatably supported at the center of the stator 2 by a bearing 7. The other end of the shaft 6 of the rotor 1 is rotatably supported by a bearing 3, and the bearing 3 is inserted into a shaft support hole provided in a bearing holding member 4. Further, the bearing holding member 4 is arranged on the opening side of the stator portion 2, and a retaining ring 5 for preventing the bearing holding member from falling off is fixed to the stator portion 2.

[0004] The function of the conventional brushless molded motor configured as described above will be described. Active portions such as the winding coil 8 of the stator portion 2, the control printed circuit board 9, and the connection portion with the lead wire 10 are all sealed with the resin 11, so that even when used in a high humidity environment, a short circuit occurs. There was no danger, and the waterproof, drip-proof, and rust-proofing properties were improved, and a long life could be maintained even in a bad environment.

[0005]

However, such a conventional brushless molded motor has an inconvenience that it is limited to an inner rotor type motor.

SUMMARY OF THE INVENTION An object of the present invention is to provide an outer rotor type motor whose torque can be larger than that of an inner rotor type motor with the same motor size, in which a live part of the outer rotor type motor is molded and fixed in a resin, and is used in a high humidity environment. There is no danger of short-circuit, etc., and the waterproof, drip-proof, and rust-proof ability is improved, and a bearing holding member is not required unlike the inner rotor type motor.
An object of the present invention is to provide an outer rotor type brushless molded motor having a small number of parts, that is, an inexpensive and long life.

[0007]

In such an outer rotor type brushless molded motor according to the present invention, a control print in which a wound stator and a lead wire having an inner diameter larger than the inner diameter of the stator are connected. A stator is connected to the substrate, and a resin-molded coil part and a lead wire coupling part are sealed with resin. The stator part includes a rotor part having a magnet at a position facing the outer peripheral side of the stator part. I have.

[0008]

Embodiments of the present invention will be described below. As shown in FIG. 1, the outer rotor type brushless molded motor according to the present invention includes a stator section 12 sealed with a resin and a rotor section 13.

The stator has a winding coil 15 on the stator 14 and is soldered to a control printed circuit board 16 having an inner diameter larger than the inner diameter of the stator 14. Lead wires 17 for supplying power to the motor are also soldered to the control printed board 16.

[0010] As shown in FIG. 1, the coils joined by soldering are resin-molded to form a coil 15.
In addition, the soldered portions of the lead wires 17 are sealed with resin to be shielded from the outside air.

Further, the stator section has a shaft 21 of a rotor section 13 in which bearings 18 and 19 are vertically arranged as shown in FIG. 1 and a magnet 20 is provided at a position facing the outer peripheral side of the stator section 12. Insert and retaining ring 22
So that the rotor portion 13 is not rotatable.

Also, in the operation of the outer rotor type brushless molded motor according to the present invention having the above-described structure, the stator live portion is connected to the outside air in the same manner as the inner rotor type despite the outer rotor type. It is possible to cut off the torque and increase the torque, eliminating the conventional restriction of being limited to the inner rotor type.

[0013]

As described above, in the outer rotor type brushless molded motor according to the present invention, since the live parts are molded and sealed with resin, short-circuiting or the like may occur even when used in a high humidity environment. Because there is no danger, waterproof
This has the effect of improving the drip-proof and rust-proofing power and extending the life. In addition, the bearing holding member, which was required in the inner rotor type brushless mold, is no longer necessary, and the number of parts is small.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic structure of a molded motor according to the present invention.

FIG. 2 is a sectional view showing the structure of a conventional molded motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 12 Stator part 13 Rotor part 14 Stator 15 Winding coil 16 Control printed board 17 Lead wire 18, 19 Bearing bearing 20 Magnet 21 Shaft

Claims (1)

[Claims] 1. A wound stator and a control printed circuit board to which a lead wire having an inner diameter larger than the inner diameter of the stator are connected, and resin-molded to form a winding coil and a lead wire connecting portion with resin. An outer rotor type mold motor comprising: a sealed stator portion; and a rotor portion provided with a magnet at a position facing an outer peripheral side of the stator portion.