KR20100068623A

KR20100068623A - Motor for electric power steering

Info

Publication number: KR20100068623A
Application number: KR1020080127037A
Authority: KR
Inventors: 김병용
Original assignee: 엘지이노텍 주식회사
Priority date: 2008-12-15
Filing date: 2008-12-15
Publication date: 2010-06-24

Abstract

The present invention relates to a motor for electric power steering.

Motor for electric power steering according to an embodiment includes a housing; A bracket coupled to an upper portion of the housing; A stator and a rotor disposed in the housing; A rotating shaft coupled to the rotor; A sensing plate coupled to the rotating shaft and having guide protrusions protruding on an outer circumferential surface thereof; A sensing magnet installed on the sensing plate and in contact with the guide protrusion; And a sensing element facing the sensing magnet.

Description

Motor for electric power steering {MOTOR FOR ELECTRIC POWER STEERING}

The present invention relates to a motor for electric power steering.

The vehicle is provided with an ECU (Electric Control Unit) for receiving electrical signals detected by various input sensors and outputting digital control signals for driving various actuators on the output side.

In addition, the motor for electric power steering assists the driver's steering force to receive a signal from the ECU so that the driver can steer lightly and quickly.

An embodiment provides a motor for electric power steering.

Embodiments provide a motor for electric power steering in which a sensing magnet can be placed in the correct position.

Embodiments can provide a motor for electric power steering.

Embodiments can provide a motor for electric power steering in which the sensing magnet can be placed in the correct position.

In the description of an embodiment according to the present invention, each layer (film), region, pattern or structure is "on" or "under" the substrate, each layer (film), region, pad or pattern. In the case where it is described as being formed in, “on” and “under” include both “directly” or “indirectly” formed. In addition, the criteria for the top or bottom of each layer will be described with reference to the drawings.

In the drawings, the thickness or size of each layer is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size of each component does not necessarily reflect the actual size.

Hereinafter, an electric power steering motor according to an embodiment will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of an electric power steering motor according to an embodiment, FIG. 2 is a view illustrating a sensing plate installed in a rotor in the electric power steering motor according to an embodiment, and FIG. 3 is an electric power according to an embodiment. A diagram illustrating a sensing magnet installed on a sensing plate in a steering motor.

1 to 3, a housing 110 and a bracket 120 coupled to the housing 110 are provided.

The housing 110 has an upper surface open and a support tube 111 protrudes from the center thereof. The bracket 120 is coupled to the upper portion of the housing 110 to define an internal space.

A first bearing 131 is installed on the support tube 111, and a second bearing 132 is installed on the bracket 120.

The rotating shaft 140 is contacted and supported by the first bearing 131 and the second bearing 132, and an upper portion of the rotating shaft 140 is supported by the second bearing 132 and a lower portion of the rotating shaft 140. Is supported by the first bearing 131.

An upper end portion of the rotating shaft 140 protrudes upward through the bracket 120 and is coupled to a mechanism 141 connected to a steering shaft (not shown).

The stator and the rotor are installed inside the housing 110.

The rotor includes a rotor core 150 coupled to the rotation shaft 140, and a magnet 160 coupled to an outer circumferential surface of the rotor core 150. The stator includes a stator core 170 disposed between the magnet 160 and the housing 110, and a coil 180 wound around the stator core 170.

Accordingly, the magnetic shaft generated from the rotor and the electric field generated from the stator interact with each other to rotate the rotating shaft 140.

Meanwhile, a sensing plate 190 is coupled to the rotating shaft 140 to rotate together with the rotating shaft 140, and a sensing magnet 200 is installed on the sensing plate 190.

In addition, a circuit board 210 is installed on the bracket 120, and a sensing element 220 facing the sensing magnet 200 is installed on the circuit board 210.

The sensing element 220 detects the degree of rotation of the sensing magnet 200 to detect the degree of rotation of the sensing plate 190 and the rotation shaft 140 to which the sensing magnet 200 is coupled.

As shown in Figure 2 and 3, the sensing plate 190 is formed in the shape of a disc is formed with a guide protrusion 191 protruding upward in the outer peripheral surface.

The guide protrusion 191 guides the sensing magnet 200 installed on the sensing plate 190 to be installed at the correct position.

When the guide protrusion 191 is not formed, a problem may arise in that the position of the sensing magnet 200 is displaced in the process of attaching the sensing magnet 200 to the sensing plate 190.

In the embodiment, as the side surface of the sensing magnet 200 is brought into contact with the inner circumferential surface of the guide protrusion 191 to guide the sensing magnet 200, the sensing magnet 200 may be disposed at the correct position on the sensing plate 190.

Therefore, the rotation of the sensing magnet 200 may be accurately sensed through the sensing element 220.

Although described above with reference to the embodiment is only an example and is not intended to limit the invention, those of ordinary skill in the art to which the present invention does not exemplify the above within the scope not departing from the essential characteristics of this embodiment It will be appreciated that many variations and applications are possible. For example, each component specifically shown in the embodiment can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

1 is a cross-sectional view of a motor for electric power steering according to an embodiment.

2 is a view illustrating a sensing plate installed in the rotor in the electric power steering motor according to the embodiment.

3 is a view for explaining that the sensing magnet is installed on the sensing plate in the electric power steering motor according to the embodiment.

Claims

housing;

A bracket coupled to an upper portion of the housing;

A stator and a rotor disposed in the housing;

A rotating shaft coupled to the rotor;

A sensing plate coupled to the rotating shaft and provided with a guide protrusion;

A sensing magnet installed on the sensing plate and in contact with the guide protrusion; And

An electric power steering motor including a sensing element facing the sensing magnet.

The method of claim 1,

The guide protrusion protrudes in a direction in which the sensing element is disposed.

The method of claim 1,

The guide protrusion is an electric power steering motor is formed to protrude in a ring shape on the sensing plate.

The method of claim 1,

And an outer circumferential surface of the sensing magnet and an inner circumferential surface of the guide protrusion contact each other.

The method of claim 1,

The sensing element is installed on a circuit board, the circuit board is an electric power steering motor supported by the bracket.

The method of claim 1,

The rotating shaft is projected through the bracket, the sensing plate is coupled to the electric power steering motor coupled to the rotating shaft.

The method of claim 1,

And a second bearing installed in the housing and supporting the rotating shaft, and a second bearing mounted on the bracket to support the rotating shaft.

The method of claim 7, wherein

A support tube is formed on a lower surface of the housing, and the first bearing is installed in the support tube.