KR20000008822U - Rotor molding structure of BLDC motor - Google Patents

Abstract

The present invention relates to a rotor molding structure of a BLDC motor, and more particularly, to a rotor molding structure of a BLDC motor which simplifies the manufacturing process and improves product reliability by integrating the rotor shaft, the magnet and the rotor iron core in an injection molding operation. will be.

The rotor molding structure of the BLDC motor of the present invention for implementing this is mounted to the rotor iron core (2) and the rotor iron core (2) fitted to the inner diameter surface of the stator core, the rotor iron core of the Rotor shaft 3 formed with a smaller outer diameter than a portion that is press-fitted therein and a magnet 1 that is pressed against the outer diameter surface of the rotor iron core 2 to which the rotor shaft 3 is fitted. ), And an injection molding (5) injected by an injection molding operation to fix the rotor shaft (3) and the rotor iron core (2), and between the magnet and the rotor iron core and the rotor shaft. It is characterized by.

Description

Rotor molding structure of BLD motor

The present invention relates to a rotor molding structure of a brushless dielectric current (BLDC) motor. In particular, the injection molding operation of the BLDC motor simplifies the manufacturing process and improves product reliability by integrating the rotor shaft, the magnet and the iron core. It relates to an electron molding structure.

In general, a rotor assembly structure of a BLDC motor includes a rotor iron core fitted to an inner diameter surface of a stator core, a rotor shaft press-fitted inside the rotor iron core, and a magnet against the outer diameter surface of the rotor iron core. It consists of magnet powder embedded by the housing.

A rotor assembly structure of a conventional BLDC motor having the above configuration will be described with reference to FIGS. 1 to 5.

1 is a block diagram illustrating a magnet used in a rotor assembly structure of a BLDC motor according to the prior art, and FIGS. 2A and 2B illustrate a rotor iron core used in the rotor assembly structure of a BLDC motor according to the prior art. One cross section and a top view. 3A and 3B are cross-sectional views and plan views illustrating a rotor shaft used in a rotor assembly structure of a BLDC motor according to the prior art. In addition, Figure 4 is a rotor iron core indentation of the BLDC motor according to the prior art, Figure 5 is a rotor assembly completion of the BLDC motor according to the prior art.

The rotor assembly structure of the BLDC motor according to the prior art includes a rotor iron core (2) having a rotation shaft hole into which the rotor shaft (3) is press-fitted and a fixing hole into which a plurality of rivets are fitted, and the rotor shaft (3). The magnet 1 is fixed to the outer circumferential surface of the inserted rotor iron core 2 using an adhesive 4 as shown in FIG. 5 to assemble the rotor.

However, in the rotor assembly structure of the conventional BLDC motor configured as described above, the manufacturing process of the rotor is complicated and time-consuming, and the magnet and the core of the rotor may be separated due to undried adhesive or poor adhesive strength. There was a problem that the product reliability is bad.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to simplify the manufacturing process and improve the reliability of the product by integrating the rotor shaft, the magnet and the iron core in an injection molding operation, the rotor of the BLDC motor To provide a molding structure.

1 is a configuration diagram showing a magnet used in the rotor assembly structure of the BLDC motor according to the prior art

2a and 2b is a cross-sectional view and a plan view showing a rotor iron core used in the rotor assembly structure of the BLDC motor according to the prior art

3a and 3b are a cross-sectional view and a plan view showing the rotor shaft used in the rotor assembly structure of the BLDC motor according to the prior art

Figure 4 is a rotor iron indentation of the BLDC motor according to the prior art

5 is a complete assembly of the rotor of the BLDC motor according to the prior art

Figure 6 is a rotor assembly of the BLDC motor according to the present invention

Explanation of symbols on the main parts of the drawings

1: magnet 2: rotor iron core

3: rotor shaft 4: adhesive

5: injection molding

In order to achieve the above object, the rotor molding structure of the BLDC motor of the present invention,

A rotor iron core (2) fitted to the stator core inner diameter surface,

A rotor shaft (3) press-fitted into the rotor iron core (2) and formed with a diameter of an outer diameter smaller than a portion press-fitted into the rotor iron core (2);

A magnet (1) press-fitted against the outer diameter surface of the rotor iron core (2) into which the rotor shaft (3) is fitted;

And an injection molding (5) injected in an injection molding operation to fix between the rotor shaft (3) and the rotor iron core (2) and between the magnet and the rotor iron core and the rotor shaft. do.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In addition, in all the drawings for demonstrating an embodiment, the thing with the same function uses the same code | symbol, and the repeated description is abbreviate | omitted.

Figure 6 shows a rotor assembly of the BLDC motor according to the present invention, a rotor iron core (2) to be fitted to the inner diameter surface of the stator core, the rotor is pressed into the rotor iron core (2) mounted It consists of the shaft 3 and the magnet 1 which is pressed against the outer diameter surface of the rotor iron core 2 in which the rotor shaft 3 was fitted. In addition, the present invention injected the injection molding (5) by the injection molding operation to fix between the rotor shaft (3) and the rotor iron core (2), and between the magnet and the rotor iron core and the rotor shaft.

As in the above configuration, the present invention in which the rotor shaft 3, the magnet 1, and the rotor iron core 2 are integrated in an injection molding operation, the injection molding 5 has the rotor shaft 3 and the rotor iron core. By fixing (2) and the magnet (1), the flow of the rotor shaft (3), the rotor iron core (2) and the magnet (1) was prevented.

As described above, according to the rotor molding structure of the BLDC motor according to the present invention, there is an effect of simplifying the manufacturing process and improving the reliability of the product by integrating the rotor shaft and the magnet and the iron core in the injection molding operation.

In addition, preferred embodiments of the present invention are disclosed for the purpose of illustration, those skilled in the art will be possible to various modifications, changes, additions, etc. within the spirit and scope of the present invention, these modifications and changes belong to the following utility model registration claims Should be seen.

Claims (1)

A rotor iron core (2) fitted to the stator core inner diameter surface, A rotor shaft (3) press-fitted into the rotor iron core (2) and formed with a diameter of an outer diameter smaller than a portion press-fitted into the rotor iron core (2); A magnet (1) press-fitted against the outer diameter surface of the rotor iron core (2) into which the rotor shaft (3) is fitted; And an injection molding (5) injected in an injection molding operation to fix between the rotor shaft (3) and the rotor iron core (2) and between the magnet and the rotor iron core and the rotor shaft. Rotor molding structure of BLDC motor.