KR20170039385A - Sensing magnet assembly and Motor having the same - Google Patents

Abstract

The present invention relates to a sensing magnet assembly comprising: a plate which has cut piece protruding therefrom and includes a plurality of hooks arranged at regular intervals with respect to a circumferential direction; and a magnet coupled to the plate and including a calking part extending inwardly from an inner circumferential surface to be coupled with the hooks. Therefore, the sensing magnet assembly prevents the magnet from being separated from the plate by forming a fixing structure of the plate and the magnet without an additional adhesive.

Description

TECHNICAL FIELD [0001] The present invention relates to a sensing magnet assembly and a motor including the sensing magnet assembly.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensing magnet assembly and a motor including the sensing magnet assembly, and more particularly, to a sensing magnet assembly including a magnet that is aligned and joined to have a concentricity with a plate and a motor including the sensing magnet assembly.

The motor is rotated by the electromagnetic interaction between the rotor and the stator. At this time, the rotation shaft inserted in the rotor also rotates to generate the rotational driving force. The sensing magnet assembly is a device for detecting the position of the rotor.

A magnetic element can be installed inside the cover of the motor. The sensing magnet assembly is installed to be rotatable with the rotor and guides the magnetic element to detect the position of the rotor through the magnetic field of the magnet included in the sensing magnet assembly.

The sensing magnet assembly includes a disk-shaped plate and a magnet coupled to the plate. Typically, the sensing magnet assembly is implemented in such a manner that the magnet is coupled to the upper side of the plate. At this time, the plate and the magnet are bonded through the adhesive. The adhesive is fixed on the plate so that the magnet does not deviate in the axial and radial directions of the motor.

However, it is not easy to manage the adhesive process using adhesives. This is because a fine process is required to apply the adhesive. Also. When the motor is applied to a vehicle, there is a possibility that the adhesive force of the adhesive deteriorates in the internal environment of the vehicle passing through high and low temperatures. If the magnet is disengaged from the plate, the motor is not driven, which can cause a serious problem in safe driving of the vehicle.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a sensing magnet assembly and a motor including the sensing magnet assembly, which can increase the coupling force between the plate and the magnet without using an adhesive.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned here can be understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a plate including a plate including a plurality of hooks protruding from a cutting edge, the hooks being disposed at predetermined intervals in a circumferential direction, and a plate coupled to the plate, And a magnet including a caulking portion to which the magnet is coupled.

Preferably, the plate includes a plurality of alignment grooves along the circumferential direction, and the hooks may be formed by cutting the alignment grooves.

Preferably, the plate includes a plurality of alignment grooves along the circumferential direction, and the hooks may be disposed between the alignment grooves.

Preferably, the cross section of the caulking portion may be bounded by a string connecting an inner circumferential surface of the magnet and two points of the inner circumferential surface.

Preferably, the caulking portion may be disposed symmetrically with respect to an imaginary reference line connecting the center of the magnet and the center of the string.

Advantageously, the hook can engage the center of the string.

According to another aspect of the present invention, there is provided a stator including a stator, a rotor rotatably disposed inside the stator, and a rotating shaft integrally rotating with the rotor, the stator being disposed on the rotor, A plate including a plurality of hooks arranged at regular intervals with respect to a circumferential direction, and a magnet coupled to the plate, the magnet including a caulking portion formed to extend inward from an inner circumferential surface and coupled with the hook, Can be provided.

Preferably, the plate includes a plurality of alignment grooves along the circumferential direction, and the hooks may be formed by cutting the alignment grooves.

Preferably, the plate includes a plurality of alignment grooves along the circumferential direction, and the hooks may be disposed between the alignment grooves.

According to an embodiment of the present invention, a hook composed of a cut-away piece formed by cutting a part of a plate is caulked to a caulking portion extending from the magnet to form a fixing structure of a plate and a magnet without a separate adhesive, Thereby providing an advantageous effect of preventing deviations.

Further, according to an embodiment of the present invention, by forming the hook in the incision groove formed in the plate, it is possible to more easily realize the fixation structure of the plate and the magnet, thereby providing an advantageous effect of simplifying the manufacturing process and reducing the cost .

1 shows a motor according to a preferred embodiment of the present invention,
FIG. 2 illustrates a sensing magnet assembly according to a preferred embodiment of the present invention. FIG.
3 is a view showing a plate and a magnet,
4 is a perspective view showing a magnet,
5 is a plan view showing the magnet.
FIG. 6 is a plan view of the sensing magnet assembly shown in FIG. 2. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The objectives, specific advantages, and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary terms and the inventor should properly define the concept of the term in order to describe its own invention in the best way. The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

1 is a view showing a motor according to a preferred embodiment of the present invention.

1, a motor according to a preferred embodiment of the present invention includes a housing 1, a stator 20, a rotor 30, a rotating shaft 40, and a sensing magnet assembly 10 .

The housing 1 is formed in a cylindrical shape and has a space in which the stator 20 and the rotor 30 can be mounted. At this time, the shape and material of the housing 10 can be variously modified, but a metal material that can withstand high temperatures can be selected. The stator 20 can be inserted into the inner space of the housing 1. [ The stator 20 may include a stator core and a coil 2 wound around the stator core.

The rotor 30 is rotatably disposed with the stator 20. The rotor 30 is rotated by an electromagnetic interaction with the stator 20 when the magnet is mounted. A rotary shaft 40 may be coupled to a central portion of the rotor 30. Therefore, when the rotor 30 rotates, the rotary shaft 40 also rotates. At this time, the rotary shaft (40) can be supported by the bearing (50).

These motors may be motors used in EPS. The EPS (Electronic Power Steering System) assists the steering force by the driving force of the motor, thereby ensuring the turning stability and providing the quick resilience to enable the driver to drive safely.

Such a motor includes a magnetic element S and a sensing magnet assembly 10 for sensing the position of the rotor 30. [

The sensing magnet assembly 10 is arranged to rotate in conjunction with the rotor 40 by engaging with the rotary shaft 40. The magnetic element S may be a hall sensor and may be disposed on the sensing magnet assembly 10.

2 is a view illustrating a sensing magnet assembly according to a preferred embodiment of the present invention. 3 is a view showing a plate and a magnet. 2 and 3 clearly illustrate only the major feature parts in order to conceptually clearly understand the present invention and as a result various variations of the illustrations are to be expected and the scope of the present invention Need not be limited.

Referring to FIGS. 2 and 3, the sensing magnet assembly 10 may include a plate 110 and a magnet 120.

The plate 110 is provided in a disc shape and may be formed of a steel plate. For example, the plate 110 may be made of electrogalvanized iron (EGI). The plate 110 may include a plurality of hooks 111.

The hook 111 may be formed such that a part of the plate 110 is formed by cutting and protruding upward. That is, the hook 111 may be formed by cutting a part of the plate 110 formed by punching. The hooks 111 may be formed so as to be curved such that their tips are directed outward from the center of the plate 110.

The plurality of hooks 111 may be disposed at regular intervals with respect to the circumferential direction of the plate 110. In one embodiment, the plate 110 may include three hooks 111 disposed at intervals of 120 degrees.

Meanwhile, a plurality of alignment grooves 122 may be formed in the plate 110. The alignment grooves 122 are arranged at regular intervals with respect to the circumferential direction of the plate 110, and are formed to penetrate the upper surface and the lower surface of the plate 110. The alignment groove 122 is an element for aligning the angle of the magnet of the rotor 30 with that of the magnet 120 of the sensing magnet assembly 10.

Alignment grooves 122 in the circumferential direction may be disposed between the hooks 111. However, the present invention is not limited thereto, and the hook 111 may be formed as an incised piece formed by being cut in the alignment groove 122. That is, it is also possible to form the hook 111 by cutting the periphery of the alignment groove 122 without forming the hook 111 in the plate 110 separately from the alignment groove 122. This makes it possible to simplify the manufacturing process of the sensing magnet assembly 10 because the hook 111 and the alignment groove 122 can be formed on the plate 110 at a time. Further, since the already-perforated alignment groove 122 is utilized, there is an advantage that the hook 111 can be implemented more easily.

Fig. 4 is a perspective view showing the magnet, and Fig. 5 is a plan view showing the magnet.

The magnet 120 is stacked on the upper surface of the plate 110. 4 and 5, the magnet 120 is formed in a disk shape corresponding to the plate 110, and the diameter of the magnet 120 may correspond to the diameter of the plate 110. The magnet 120 is formed in an annular shape so that the inner circumferential surface 112 is formed.

 The magnet 120 may include a main pole disposed in the circumferential direction adjacent to the hole forming the inner circumferential surface 112 and an FG (Frequency Generator) pole formed at the periphery. The main pole is composed of a plurality of poles arranged in the same manner as the drive magnets inserted in the rotor of the motor. The FG poles are more numerous than the main poles. Accordingly, it is possible to measure the rotational angle more finely and measure it, and the driving of the motor can be made more smooth.

The magnet 120 may include a caulking portion 121. The caulking portion 121 is an area where the hook 111 is coupled to the inner circumferential surface 122 of the magnet 120 so as to extend inward. The caulking portion 121 may be a boundary between the inner circumferential surface 122 of the magnet 120 and the string 123 connecting two points of the inner circumferential surface 122.

For example, three caulking portions 121 may be formed along the inner circumferential surface 122 of the magnet 120 in correspondence with the three hooks 111 of the plate 110. Each of the caulking portions 121 may be disposed symmetrically with respect to a virtual reference line H connecting the center C of the magnet 120 and the center of the string 123. The size of the caulking portion 121 is appropriately designed so as to secure the coupling force between the plate 110 and the magnet 120 in consideration of the size of the hook 111 and the size of the plate 110 and the magnet 120 .

The caulking seating part 121a may be concave at the center of the caulking part 121 with the string 213 as a boundary. The caulking seating part 121a enhances the contact between the caulking part 121 and the hook 111 and enhances the bonding force.

FIG. 6 is a plan view of the sensing magnet assembly shown in FIG. 2. FIG.

Referring to FIG. 6, the hook 111 may be caulked near the center of the width of the caulking portion 121 with reference to the reference line H. This is because coupling with the center of the width of the caulking portion 121 can sufficiently secure the coupling force between the caulking portion 121 and the hook 111 in consideration of the shape of the curved caulking portion 121.

It is possible to join the hook 111 and the magnet 120 without a separate adhesive since the hook 111 is caulked to the magnet 120 when the magnet 120 is coupled to the plate 110. [ Since the hook 111 and the plate 110 are physically coupled without a chemical agent such as an adhesive, it is possible to prevent the magnet 120 from deviating from the plate 110 even in a high temperature environment inside the vehicle. In addition, since the use of an adhesive requiring a constant curing time is excluded, it is possible to speed up and simplify the manufacturing process of the sensing magnet assembly.

As described above, the sensing magnet assembly according to one preferred embodiment of the present invention and the motor including the sensing magnet assembly have been specifically described with reference to the accompanying drawings.

It is to be understood that one embodiment of the invention described above is to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description. It is intended that all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

1: Housing
10: sensing magnet assembly
20:
30: Rotor
40:
110: Plate
111: Hook
112: Alignment groove
112: inner peripheral surface
120: Magnet
121: caulking portion

Claims (9)

A plate including a plurality of hooks formed by projecting the incision pieces and arranged at predetermined intervals in the circumferential direction;
And a calking portion coupled to the plate and extending inwardly from the inner circumferential surface to join the hook,
≪ / RTI > The method according to claim 1,
Wherein the plate includes a plurality of alignment grooves along a circumferential direction, and the hooks are formed by being cut out from the alignment grooves. The method according to claim 1,
Wherein the plate includes a plurality of alignment grooves along a circumferential direction, and the hooks are disposed between the alignment grooves. The method according to claim 1,
Wherein a cross section of the caulking portion is a boundary between an inner circumferential surface of the magnet and two points of the inner circumferential surface. 5. The method of claim 4,
Wherein the caulking portion is disposed symmetrically with respect to an imaginary reference line connecting the center of the magnet and the center of the string. 6. The method of claim 5,
Wherein the hook engages the center of the string. Stator;
A rotor rotatably disposed inside the stator; And
And a rotating shaft integrally rotating with the rotor,
A plate including a plurality of hooks disposed on an upper side of the rotor and formed by protruding a cutting edge and arranged at regular intervals with reference to a circumferential direction, and a plate coupled to the plate, A sensing magnet assembly including a magnet including a caulking portion
/ RTI > 8. The method of claim 7,
Wherein the plate includes a plurality of alignment grooves along a circumferential direction, and the hooks are formed by being cut out from the alignment grooves. 8. The method of claim 7,
Wherein the plate includes a plurality of alignment grooves along a circumferential direction, and the hooks are disposed between the alignment grooves.

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