KR20110048968A - Molded-type motor - Google Patents

Abstract

PURPOSE: A molded-type motor is provided to prevent the inflow of water into a terminal and a resin by sealing a combination wire of an exposed terminal and a resin. CONSTITUTION: In a molded-type motor, a stator assembly(10) forms a hollow body(10'). The hollow body is molded by a resin. A bearing is installed in the hollow both sides entrance. A rotor shaft is supported in bearing. A rotor(20) is inserted into the hollow of the stator assembly. A stator assembly is comprised of a core(11), an insulator, a coil, a current control device, and an assembly. The coil is wound around the teeth of the core. A current control device controls a current applied to the coil. The current controls the driving and speed of rotation of rotor. A terminal is connected to a substrate and is projected to one side of a resin.

Description

Molded Type Motor {MOLDED-TYPE MOTOR}

The present invention relates to a mold type motor, and more particularly, to a mold type motor capable of preventing the penetration of water through the gap between the terminal and the resin material by sealing along the gap between the terminal and the resin material.

The mold-type motor has a stator assembly formed by molding a resin material so that the coil has a hollow around an outer circumference of the core, and a rotor inserted into the hollow of the stator assembly. Such a mold-type motor can prevent the inflow of moisture into the stator assembly to prevent corrosion of the core. In general, a resin material molded into a stator assembly generally uses a thermosetting resin having a somewhat lower molding temperature so as not to affect a circuit board and a mounting element provided in the stator.

Figure 1a is a perspective view showing the appearance of a typical mold type motor, Figure 1b is a view showing a cross section of a typical mold type motor. In the figure, a stator assembly 1 in which a thermosetting resin is molded to form a body, a rotor 2 inserted into the stator assembly 1 hollow, and a rotor shaft 2b of the rotor 2 are rotatably supported. The bearing is provided and consists of upper and lower bearing caps 3a and 3b coupled to both sides of the hollow of the stator assembly. The stator assembly 1 has a core 1a formed by stacking iron pieces so that teeth protrude inwardly and are arranged in an annular shape, an insulator 1b for enclosing and insulating the core 1a, and winding the teeth of the core 1a. A sensor attached to the upper portion of the support 1c-1 to sense a magnetic pole of the coil and an element for controlling the current applied to the coil to control the starting and rotation speed of the rotor, etc. It consists of the board | substrate 1c in which (1c-2) etc. were mounted, and the resin material 1d molded so that the assembly which combined the said structure were combined.

2A and 2B are views showing the plane and side surfaces of the substrate 1c constituting the stator assembly 1. Referring to the drawings, the substrate 1c has a through hole H formed at the center thereof, and the sensor 1c attached to the upper portion of the support 1c-1 arranged at fixed intervals around the through hole H. -2) is mounted to sense stimulation of the rotor. In addition, the substrate 1c is provided with a terminal coupling portion S1 protruding to one side, and a terminal 1d-3 connected to an external terminal (not shown) to be connected to a circuit configured on the substrate. The element mounting portion S2 is protruded laterally on one side of the portion S1, and the control element 1c-4 or the like is mounted on the element mounting portion S2.

In the case of a conventional mold type motor having a shape in which the terminal coupling portion S1 and the element mounting portion S2 are formed, the element mounting portion is formed at one side of the terminal coupling portion S1 when the resin material 1d is molded. Since the resin material 1d must be molded to the portion corresponding to (S2), the resin material 1d is consumed a lot, thereby increasing the manufacturing cost.

In addition, in the case of a conventional mold-type motor, in order to sense the magnetic pole of the rotor on the side, a support 1c-1 is separately manufactured to increase the position of the sensor 1c-2, and the sensor is mounted on the support 1c-1. Since it must be attached to the substrate (1c) by mounting and the manufacturing of the substrate (1c) there is a problem that the cost increases due to the production and attachment of the support (1c-1).

3A and 3B are a perspective view and a cross-sectional view showing a portion where the terminal 1c-3 is exposed to one side of the resin 1d in the conventional mold type motor, respectively. The terminal 1c-3 is exposed to the outside of the resin 1d so as to be connected to an external terminal (not shown in the drawing), and is exposed to a portion where the resin 1d and the terminal 1c-3 are coupled. If a gap (G) is generated, a problem occurs that the moisture enters the gap (G).

The present invention has been made to solve the above problems is that the object of the present invention is to form a seal along the bonding line of the terminal and the resin exposed to the outside of the resin to expose the moisture into the gap between the terminal and the resin. It is to provide a mold-type motor that can prevent that.

In order to achieve the above object, a mold-type motor according to the present invention includes a stator assembly in which a hollow body is formed by molding an assembly in which a core, a coil, and a substrate are assembled with a resin material, and a hollow of the stator assembly. In a mold-type motor including a bearing installed at both sides of the inlet, and a rotor supported by the bearing and inserted into the hollow of the stator assembly, the stator assembly is formed by laminating iron pieces to protrude inwards into an annular shape. Sensing the magnetic poles of the arrayed core, an insulator for surrounding the core, an coil for winding the teeth of the core, an element for controlling the current applied to the coil to control the starting and rotational speed of the rotor, etc. Consists of a resin material molded so as to surround the assembly on which the substrate, core, and coil are mounted. Being, the substrate has the terminal to which the connection terminal that is characterized in that it is being projected in a side of the resin, water, a gap between the exposed terminals and the resin material is to be sealed.

According to the above configuration, the mold-type motor according to the present invention can prevent the moisture from penetrating into the gap between the terminal and the resin by forming a seal along the connection line between the terminal exposed to the resin and the resin. Has an advantage.

Hereinafter, a mold type motor according to the present invention will be described in detail with reference to the embodiment shown in the drawings.

4A and 4B are exploded perspective views and cross-sectional views illustrating a mold type motor according to an embodiment of the present invention, and FIGS. 5A and 5B illustrate a substrate of a stator assembly of a mold type motor according to an embodiment of the present invention. 6 is a plan view and a side view, and FIGS. 6A and 6B are perspective views and cross-sectional views illustrating portions of terminals of a stator assembly of a mold type motor according to an exemplary embodiment of the present invention.

4A and 4B, a mold type motor according to an embodiment of the present invention includes a stator assembly 10, a rotor 20, and bearing caps 30 and 30 ′.

The stator assembly 10 is formed to have a hollow body by molding the assembly of the core 11 and the coil (not shown) and the substrate 13 into a resin material 14.

The core 11 of the stator assembly 10 is formed by stacking iron pieces and the teeth protrude inwardly and are arranged in an annular shape. The insulator 12 is formed by injecting resin into a structure for enclosing the core 11 and insulating the coil, and is coupled to the core 11 to surround the core 11. The coil generates a magnetic field by applying a current from an element formed in the substrate 13 to generate a magnetic force for rotating the rotor 20 by generating magnetic force and magnetic force of the rotor 20. The coil is wound around the teeth of the core. The substrate 13 senses a magnetic pole of the element 13c and the magnet 21 of the rotor 20 for controlling the current applied to the coil to control the coil, the starting and rotational speed of the rotor 20, and the like. A sensor 13b for mounting is mounted and coupled to one side of the insulator 12. Referring to the drawings, the substrate 13 has a through hole 13a formed at the center thereof, and a terminal connection part S formed therein for protrudingly connecting the terminal 13d to one side thereof, and the terminal connection part S at the center thereof. It has a symmetrical structure. The present invention is formed so that only the terminal connecting portion (S) protrudes on the substrate 13 can reduce the amount of the resin material 14 for molding by reducing the overall volume.

On the other hand, the sensor (13b) is arranged at a predetermined interval around the through hole (13a) is mounted on the upper portion of the substrate 13, the present invention is the sensor (13b) is a hollow ( 10 ') is mounted directly on the substrate 13 to be positioned above or below the magnetic pole of the magnet 21 of the rotor 20 inserted therein. The figure shows an embodiment in which the sensor 13b is shown positioned on the top surface of the magnet 21 of the rotor 20. The present invention is characterized in that the sensor 13b is directly mounted on the substrate 13 without a support, thereby facilitating the manufacture of the substrate 13 and reducing the cost.

The resin material 14 is molded to surround the assembly in the state in which the assembly in which the core 11, the insulator 12, the coil and the substrate 13 are assembled is inserted. The stator assembly 10 in which the resin material 14 is molded is formed to have a hollow in which a rotor is located at the center.

On the other hand, the terminal 13d for connecting to an external terminal (not shown in the drawing) in the state in which the resin material 14 is molded is exposed to protrude outwardly to one side of the resin material 14. The present invention is characterized in that the gap (G) between the terminal 13d and the resin material is sealed with a silicone, a resin material, an adhesive, or the like. The gap between the terminal 13d and the resin material is completely sealed by the seal 15 as described above.

The rotor 20 includes a magnet 21 having magnetic poles around it and a rotor shaft 22 penetrating up and down through the magnet, and supported by the bearing caps 30 and 30 '. The magnet 21 is mounted to be located inside the hollow of the stator assembly 10.

The bearing caps 30 and 30 'are installed to block both inlets of the hollow 10' of the stator assembly 10, and the rotor shaft 22 of the rotor 20 is attached to a bearing provided therein. Supported.

The mold type motor described above and shown in the drawings is only one embodiment for carrying out the present invention, and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the claims below, and the embodiments which have been improved and changed without departing from the gist of the present invention will be apparent to those skilled in the art. It will be said to belong to the protection scope of the present invention.

1A and 1B are exploded perspective views and cross-sectional views showing a conventional mold type motor.

2A and 2B are a plan view and a side view showing a substrate of a stator assembly of a conventional mold type motor;

3A and 3B are a perspective view and a cross-sectional view showing an exposed portion of the terminal of the stator assembly of a conventional mold type motor;

4A and 4B are exploded perspective views and cross-sectional views showing a mold type motor according to an embodiment of the present invention.

5A and 5B are plan and side views illustrating a substrate of a stator assembly of a mold type motor according to an embodiment of the present invention.

6a and 6b are a perspective view and a cross-sectional view showing a portion of the terminal exposed portion of the stator assembly of the mold type motor according to an embodiment of the present invention;

<Short description of the major reference symbols>

10 Stator Assembly

     11 core

     12 insulators

     13 boards

     14 resin

20 rotor

    21 magnet

     22 rotor shaft

30 bearing caps

Claims (1)

A stator assembly formed by forming a hollow body by molding an assembly in which a core, a coil, and a substrate are assembled with a resin material, bearings installed at both inlets of the hollow of the stator assembly, and a rotor shaft are supported by the bearing. In the mold type motor including a rotor inserted into the hollow of the stator assembly, The stator assembly is a core formed by stacking iron pieces so that teeth protrude inwardly and are arranged in an annular shape, an insulator for enclosing and insulating the core, a coil wound around the core of the core, and a coil to control the starting and rotation speed of the rotor. Comprising an element for controlling the current applied to the sensor and a sensor for sensing the magnetic pole of the rotor, and a resin material molded to surround the assembly assembled the core and the coil, Terminals are connected to the substrate and the terminals protrude to one side of the resin material. Molded motor, characterized in that the gap between the exposed terminal and the resin material is sealed.

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