KR20220091886A - Apparatus for sensing - Google Patents

Abstract

Disclosed in an embodiment is a sensing apparatus comprising: a case; a stator disposed inside the case; a rotor disposed to correspond to the stator; a collector disposed to correspond to the stator; a sensor disposed to correspond to the collector; and a substrate on which the sensor is placed. The case comprises a middle case with a first protrusion and a second protrusion, an upper case having a first hook coupled to the first protrusion, and a lower case having a second hook coupled to the second protrusion, wherein the first hook is disposed to cover a partial area of the second hook. Accordingly, the sensing apparatus improves coupling force between the cases through a coupling structure of the upper case and the lower case using the middle case as a medium.

Description

Sensing device {APPARATUS FOR SENSING}

The embodiment relates to a sensing device.

In order to secure steering stability of the vehicle, a steering device that assists steering by using a separate power may be used in the vehicle. In particular, an electric power steering system (EPS, Electronic Power Steering System) having little loss of power and excellent accuracy is used in a vehicle.

The electric steering device drives a motor from an electronic control unit based on driving conditions and driver manipulation information detected by a vehicle speed sensor, torque sensor, and angle sensor, etc. to ensure turning stability and provide quick restoration to the driver to enable safe driving.

The torque sensor measures the torque applied to the steering shaft by measuring the degree of torsion of the torsion bar. And the index sensor detects the rotation of the output shaft, and measures the angular acceleration of the steering shaft. Here, the torque sensor and the index sensor may be disposed together to be integrally configured.

The torque sensor may include a case, a rotor including a ring-shaped magnet, a stator, a pair of collectors, and a sensor disposed between the collectors. In addition, the torque sensor may measure the torque by detecting a magnet flux that changes according to the rotation of the magnet and outputting an electrical signal. Here, as the sensor, a Hall IC may be used.

The case includes an upper case and a lower case, and the upper case and the lower case may be coupled using a hook. Here, the hook is disposed on the outside of the case, but there is a problem in that it is vulnerable to external force. For example, when an external force such as a drop is applied to the case, the hook is broken and the case is separated.

Accordingly, the case improves the coupling force between the cases by using a fastening member such as a screw or fusion between the cases in addition to the coupling structure by the hook.

However, there is a problem in that productivity decreases when using the fusion bonding or bonding using the fastening member.

Accordingly, there is a demand for a sensing device capable of strengthening the coupling structure through the hook.

The embodiment provides a sensing device in which the coupling structure between the cases is strengthened through a hook using a middle case.

The embodiment provides a sensing device that strengthens the coupling between the cases by implementing the coupling of the middle case and the upper case using the hook and the coupling of the hook of the upper case and the hook of the lower case together with the coupling of the middle case and the lower case. .

The problems to be solved by the embodiment are not limited to the problems mentioned above, and other problems not mentioned here will be clearly understood by those skilled in the art from the following description.

The task is a case; a stator disposed inside the case; a rotor disposed to correspond to the stator; a collector disposed to correspond to the stator; a sensor disposed to correspond to the collector; and a substrate on which the sensor is disposed, wherein the case includes a middle case having a first protrusion and a second protrusion formed therein, an upper case having a first hook coupled to the first protrusion, and a second hook coupled to the second protrusion and a lower case formed therein, wherein the first hook is achieved by a sensing device disposed to cover a partial area of the second hook.

Here, the first hook includes a body portion disposed on the outer surface of the upper case and a hook portion formed to protrude from the body portion in the axial direction, and a groove is formed on the lower surface of the body portion to be concave in the axial direction, A portion of the second hook may be disposed in the groove.

In addition, the middle case may further include a guide for guiding the first hook and the second hook.

The task is a case; a stator disposed inside the case; a rotor disposed to correspond to the stator; a collector disposed to correspond to the stator; a sensor disposed to correspond to the collector; and a substrate on which the sensor is disposed, wherein the case includes a middle case having a first protrusion and a second protrusion formed therein, an upper case having a first hook coupled to the first protrusion, and a second hook coupled to the second protrusion The lower case is formed, and the first hook is achieved by a sensing device including a groove to which an edge of the second hook is coupled.

The embodiment may improve the coupling force between the cases through the coupling structure of the upper case and the lower case through the middle case, and the coupling structure of the upper case and the lower case.

Various and advantageous advantages and effects of the embodiments are not limited to the above, and will be more easily understood in the course of describing specific embodiments of the embodiments.

1 is a perspective view showing a sensing device according to an embodiment;
2 is a bottom perspective view showing a sensing device according to an embodiment;
3 is an exploded perspective view showing a sensing device according to an embodiment;
4 is a perspective view showing a case of a sensing device according to an embodiment;
5 is an exploded perspective view showing a case of a sensing device according to an embodiment;
6 is a cross-sectional perspective view taken along line AA of FIG. 4;
7 is a front view showing an upper case of a case disposed in the sensing device according to the embodiment;
8 is a bottom view showing an upper case of a case disposed in the sensing device according to the embodiment;
9 is a front view showing a middle case of a case disposed in a sensing device according to an embodiment;
10 is a front view illustrating a lower case of a case disposed in a sensing device according to an embodiment.

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

However, the technical spirit of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of the components may be selected between the embodiments. It can be combined and substituted for use.

In addition, the terminology used in the embodiments of the present invention is for describing the embodiments and is not intended to limit the present invention.

In the present specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or more than one) of A and (and) B, C", it is combined as A, B, C It may include one or more of all possible combinations.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the component from other components, and are not limited to the essence, order, or order of the component by the term.

In addition, when it is described as being formed or disposed on "above (above) or under (below)" of each component, top (above) or under (below) is one as well as when two components are in direct contact with each other. Also includes a case in which another component as described above is formed or disposed between two components. In addition, when expressed as "upper (upper) or lower (lower)", the meaning of not only an upper direction but also a lower direction based on one component may be included.

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, but the same or corresponding components are given the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted.

The sensing device according to the embodiment may be disposed between an output shaft (not shown) and an input shaft (not shown) of the steering shaft. Here, the input shaft may be referred to as a first axis, and the output shaft may be referred to as a second axis. And, the sensing device may be a torque sensor.

Fig. 1 is a perspective view showing a sensing device according to an embodiment, Fig. 2 is a bottom perspective view showing the sensing device according to the embodiment, and Fig. 3 is an exploded perspective view showing the sensing device according to the embodiment. 1 and 2 , the x direction may mean a radial direction, and the y direction may mean an axial direction. In addition, the axial direction and the radial direction may be perpendicular to each other. In addition, reference numeral 'C' shown in FIGS. 1 to 3 may indicate the rotation centers of the rotor 500 and the stator 600 .

1 to 3 , the sensing device according to the embodiment includes a case 100 including a middle case 200 , an upper case 300 and a lower case 400 , and is connected to a first shaft that is the input shaft. A rotor 500, a stator 600 connected to the second shaft that is the output shaft, a pair of collectors 700 disposed to correspond to the stator 600, and a sensor 800 disposed to correspond to the collector 700 , and a circuit board 900 on which the sensor 800 is mounted. In addition, the rotor 500 may be rotatably disposed inside the stator 600 . Here, the inner side may mean a direction disposed toward the rotation center C of the motor with respect to the radial direction, and the outer side may mean a direction opposite to the inner side.

As the magnet 530 of the rotor 500 rotates in conjunction with the first shaft, the flow of the magnet flux may be converted. And, the sensor 800 through the stator tooth 630 and the collector 700 disposed in the stator 600 detects a magnet flux having a different direction and intensity, and then using it to output an electrical signal. have.

The case 100 forms an outer shape of the sensing device, and may support and protect each component of the sensing device disposed therein.

4 is a perspective view showing a case of a sensing device according to an embodiment, FIG. 5 is an exploded perspective view showing a case of a sensing device according to an embodiment, and FIG. 6 is a cross-sectional perspective view taken along line A-A of FIG. 4 .

4 to 6 , the case 100 may be implemented by a middle case 200 , an upper case 300 , and a lower case 400 that are mutually coupled to each other so as to have an accommodating space therein. In addition, the circuit board 900 on which the rotor 500 , the stator 600 , the collector 700 , and the sensor 800 are mounted may be disposed in the accommodation space.

Based on the axial direction, the middle case 200 is disposed between the upper case 300 and the lower case 400, and may be used as a medium for coupling between the cases. For example, the upper case 300 may be coupled to an upper portion of the middle case 200 , and the lower case 400 may be coupled to a lower portion of the middle case 200 .

In this case, the sensing device may strengthen the coupling between the cases by coupling the upper case 300 and the lower case 400 via the middle case 200 . Furthermore, the sensing device may further improve the coupling force between the cases by further implementing a coupling structure between the upper case 300 and the lower case 400 . Accordingly, the sensing device may compensate for the vulnerability of the coupling to an external shock such as a drop.

7 is a front view illustrating an upper case of a case disposed in a sensing device according to an embodiment, FIG. 8 is a bottom view illustrating an upper case of a case disposed in a sensing device according to an embodiment, and FIG. It is a front view illustrating a middle case of a case disposed in a sensing device, and FIG. 10 is a front view illustrating a lower case of a case disposed in a sensing device according to an embodiment.

The middle case 200 may be provided as a frame in which a space is formed for disposing the rotor 500 , the stator 600 , the collector 700 , the circuit board 900 , and the like. For example, the middle case 200 may be provided as a frame in which openings are formed in the upper and lower portions, respectively.

The middle case 200 may include a middle case body 210 having a space therein, a first protrusion 220 , and a second protrusion 230 . In addition, the middle case 200 may further include a guide 240 .

As shown in FIG. 5 , the first protrusion 220 may be disposed on the curved surface 211 of the outer surface of the middle case body 210 . Here, since the curved surface 211 may be formed to have a predetermined curvature with respect to the center C, it may be referred to as an outer peripheral surface. Accordingly, the curved surface 211 may be referred to as a first curved surface or a first outer peripheral surface.

The first protrusion 220 may be formed to protrude in a radial direction from the first outer circumferential surface. In addition, the first protrusion 220 may be coupled to the first hook 330 of the upper case 300 . In this case, a chamfer may be formed on the upper side of the first protrusion 220 for coupling with the first hook 330 .

As shown in FIG. 5 , the second protrusion 230 may be disposed on the curved surface 211 of the outer surface of the middle case body 210 . In addition, two second protrusions 230 may be formed. For example, the first protrusion 220 may be disposed between the two second protrusions 230 in the circumferential direction.

The second protrusion 230 may be formed to protrude from the first outer circumferential surface in a radial direction. In addition, the second protrusion 230 may be coupled to the second hook 430 of the lower case 400 . In this case, a chamfer may be formed on the lower side of the second protrusion 230 for coupling with the second hook 430 .

The guide 240 may guide the coupling of the first protrusion 220 and the first hook 330 and the coupling of the second protrusion 230 and the second hook 430 .

In addition, when the first protrusion 220 and the first hook 330 are coupled, the guide 240 serves as a stopper so that the first hook 330 is positioned at a preset position, so that the upper case It makes it possible to secure the true position of (300).

As shown in FIG. 5 , the guide 240 may be disposed on the curved surface 211 of the outer surface of the middle case body 210 . In addition, the guide 240 may be formed to protrude in a radial direction from the first outer circumferential surface.

The guide 240 may include a guide part 241 and a stopper part 242 . When viewed from the radial direction, the guide part 241 and the stopper part 242 may be formed in a 'U' shape. Here, the guide part 241 and the stopper part 242 may be integrally formed.

The two guide parts 241 may be disposed to be spaced apart from each other in the circumferential direction of the first outer circumferential surface to correspond to the two second hooks 430 . Here, the guide part 241 may be formed in a linear bar shape along the axial direction. Accordingly, the guide part 241 may guide the first hook 330 and the second hook 430 . In this case, the guide part 241 may be referred to as a vertical bar.

The stopper part 242 may have a linear bar shape connecting the lower ends of the two guide parts 241 and may be formed along the circumferential direction, but is not limited thereto. For example, it may be formed in a linear bar shape spaced apart between the two guide parts 241 . However, in terms of protection of the first hook 330 , the stopper part 242 is preferably formed in a shape connecting the lower ends of the two guide parts 241 .

The stopper part 242 supports the end of the first hook 330 so that the first hook 330 is positioned at a preset position. Here, the stopper part 242 may be referred to as a horizontal bar.

Meanwhile, since the guide 240 is disposed along the circumference of the first hook 330 , the guide 240 prevents an external force applied from the outside from being directly applied to the first hook 330 . can

The upper case 300 may be disposed to cover an upper portion of the middle case 200 .

The upper case 300 may include an upper case body 310 in which a hole 320 is formed for disposing the rotor 500 , and a first hook 330 coupled to the first protrusion 220 . .

The upper case body 310 may be disposed on the middle case 200 . Accordingly, the upper case body 310 may cover the upper opening of the middle case 200 . Here, the upper case body 310 may be referred to as a first case body.

The hole 320 is formed in the upper case body 310 and may be formed for coupling the first shaft and the rotor 500 .

As shown in FIG. 5 , the first hook 330 may be disposed on the curved surface 311 of the outer surface of the upper case body 310 . Here, since the curved surface 311 may be formed to have a predetermined curvature with respect to the center C, it may be referred to as an outer peripheral surface. Accordingly, the curved surface 311 may be referred to as a second curved surface or a second outer peripheral surface.

The first hook 330 may be formed to protrude in a radial direction from the second outer circumferential surface. In addition, a portion of the first hook 330 may protrude in an axial direction to radially overlap the middle case 300 . In this case, the first hook 330 may be coupled to the first protrusion 220 of the middle case 300 .

The first hook 330 includes a body portion 331 formed to protrude in a radial direction from the second outer circumferential surface, a hook portion 332 formed to protrude in an axial direction from a lower end of the body portion 331, and the body portion A groove 333 formed concavely in the axial direction may be included in the lower surface 321a of the 331 . Here, the body portion 331 may be referred to as a hook body.

The hook part 332 may be coupled to the first protrusion 220 . As shown in FIG. 8 , in order to couple the hook part 332 and the first protrusion 220 , the first hook part 322 has a predetermined interval in the radial direction from the second outer circumferential surface formed in a curved surface. (G) may be spaced apart to have. In addition, a lower side of the hook part 332 may radially overlap the middle case body 210 .

In addition, the hook part 332 may be formed in a 'U' shape. Accordingly, a first hole 332a coupled to the first protrusion 220 may be formed in the hook portion 332 . Here, the first hole 332a may be formed in the hook part 332 to penetrate in the radial direction.

The groove 333 may be coupled to a portion of the second hook 430 of the lower case 400 . In detail, the case 100 may implement a coupling structure of the upper case 300 and the lower case 400 through the coupling of the groove 333 and the second hook 430 . Accordingly, it is possible to further strengthen the coupling between the cases. As shown in FIG. 6 . A partial region of the second hook 430 may be disposed in the groove 333 to strengthen the coupling between the cases.

That is, as a partial region of the second hook 430 is disposed in the groove 333 , the lower edge of the body 331 may be disposed to cover a partial region of the second hook 430 . . That is, a partial region of the second hook 430 and a lower edge of the body portion 331 are disposed to overlap in a radial direction to strengthen the coupling between the cases.

Referring to FIG. 8 , two grooves 333 may be formed on the inner edge side of the lower surface 331a, respectively.

The lower case 400 may be disposed to cover a lower portion of the middle case 200 .

The lower case 400 may include a lower case body 410 in which a hole 420 is formed for disposition of the stator 600 , and a second hook 430 coupled to the second protrusion 230 . . Here, the second hook 430 may be formed in the same number as the second protrusion 230 .

The lower case body 410 may be disposed under the middle case 200 . Accordingly, the lower case body 410 may cover the lower opening of the middle case 200 . Here, the lower case body 410 may be referred to as a second case body.

The hole 420 is formed in the lower case body 410 and may be formed for coupling the second shaft and the stator 600 .

As shown in FIG. 5 , the second hook 430 may be disposed on the curved surface 411 of the outer surface of the lower case body 410 . Here, since the curved surface 411 may be formed to have a predetermined curvature with respect to the center C, it may be referred to as an outer peripheral surface. Accordingly, the curved surface 411 may be referred to as a third curved surface or a third outer peripheral surface.

The second hook 430 may be formed to protrude in an axial direction from the third outer circumferential surface. In this case, a portion of the upper side of the second hook 430 may protrude to overlap the middle case 300 in a radial direction.

In addition, the second hook 430 may be coupled to the second protrusion 230 of the middle case 300 .

The second hook 430 may be formed in a 'U' shape. Accordingly, a second hole 431 coupled to the second protrusion 230 may be formed in the second hook 430 . Here, the second hole 431 may be formed to penetrate in a radial direction.

Meanwhile, a step 432 may be formed at an upper edge of the second hook 430 to correspond to the edge of the body 331 . Here, the step 432 may be formed by concavely cutting the upper edge of the second hook 430 in the axial direction. In this case, the step 432 may be formed to be spaced apart from the third outer circumferential surface in a radial direction. That is, the step 432 may be formed outside the upper edge of the second hook 430 .

Accordingly, as the step 432 is formed, an upper edge of the second hook 430 may be disposed in the groove 333 . Accordingly, the sensing device may strengthen the coupling between the cases through the edge of the body portion 331 disposed on the step 432 .

On the other hand, the lower edge of the body portion 331 of the first hook 330 may be in contact with the step 432 . Accordingly, the step 432 serves as a stopper, thereby making it possible to secure the true position of the upper case 300 .

In summary, the second hook 430 of the lower case 400 is primarily fixed to the second protrusion 230 of the middle case 200 by a hook fastening method.

Then, the first hook 330 of the upper case 300 is secondarily fixed to the first protrusion 220 of the middle case 200 by a hook fastening method.

Then, an end portion of the second hook 430 is inserted into the groove 333 formed in the first hook 330 of the upper case 300 and fixed in a third manner. Accordingly, the first hook 330 may press the second hook 430 to improve the coupling force between the cases.

Furthermore, the guide 240 is formed to protect the first hook 330 , and may protect the first hook 330 from an external force directly applied to the first hook 330 . Even if the second hook 430 is damaged by an external force, since it is in a fixed state by inserting an end portion of the second hook 430 into the groove 333 formed in the first hook 330, the Separation or disassembly of the case 100 can be prevented.

That is, the case 100 is a case through the coupling structure of the upper case 300 and the lower case 400 through the middle case 200, and the coupling structure of the upper case 300 and the lower case 400. It is possible to improve the bonding force between the.

The rotor 500 may be connected to a first shaft that is an input shaft among the steering shafts. Here, the input shaft may be a steering shaft connected to the steering wheel of the vehicle.

The rotor 500 may be rotatably disposed inside the stator 600 . In this case, based on the radial direction, the rotor 500 may be disposed to be spaced apart from the stator 600 to form an air gap.

The rotor 500 may include a cylindrical rotor holder 510 , a rotor body 520 disposed on one side of an outer peripheral surface of the rotor holder 510 , and a magnet 530 coupled to the rotor body 520 . .

The rotor holder 510 may be coupled to the first shaft. Accordingly, the rotor holder 510 may rotate in association with the rotation of the first shaft.

The rotor holder 510 may be formed in a cylindrical shape or a tubular shape. In addition, the lower end of the rotor holder 510 may be coupled to the rotor body 520 . Here, the rotor holder 510 may be formed of a metal material, but is not necessarily limited thereto, and other materials in consideration of strength greater than a certain level may be used so that the first shaft can be fitted and fixed.

The rotor body 520 may be formed in a ring shape. In addition, a serration may be formed on the upper surface of the rotor body 520 . Here, the serration may be engaged with an external device for setting the origin, and may be formed in a concave-convex shape along the circumferential direction.

In addition, the rotor body 520 may be formed of a synthetic resin material such as resin. Accordingly, the rotor holder 510 and the magnet 530 may be coupled to the rotor body 520 formed through an injection method. That is, the rotor holder 510 and the magnet 530 may be coupled via the rotor body 520 and may be linked to the rotation of the first shaft.

The magnet 530 is coupled to the rotor body 520 and may rotate in association with the rotation of the rotor holder 510 .

Also, the magnet 530 may be disposed on the lower side of the rotor holder 510 . In addition, the magnet 530 may be disposed to correspond to the teeth of the stator 600 . For example, based on the radial direction, the magnet 530 may be disposed to face the inside of the tooth of the stator 600 . In this case, the air gap may be formed between the teeth of the magnet 530 and the stator 600 .

The stator 600 may be rotatably disposed outside the rotor 500 . In addition, the stator 600 may be connected to a second shaft that is an output shaft.

The stator 600 may include a stator holder 610 , a stator body 620 , and a pair of stator teeth 630 respectively disposed above and below the stator body 620 .

The stator holder 610 may be connected to a second shaft that is an output shaft among steering shafts. Accordingly, the stator holder 610 may rotate in association with the rotation of the second shaft. Here, the stator holder 610 may be formed of a metal material, but is not limited thereto. For example, the stator holder 610 may be made of another material having a strength greater than or equal to a certain level so that the second shaft can be fitted and fixed.

The stator body 620 may be disposed at one end of the stator holder 610 . For example, the stator body 620 may be disposed at one end of the stator holder 610 by an insert injection method using a synthetic resin such as resin. In addition, the magnet 530 of the rotor 500 may be disposed inside the stator body 620 .

In addition, the stator body 620 may include a hole formed for coupling with the stator tooth 630 .

The stator tooth 630 may be fixedly coupled to the stator body 620 . In this case, the stator teeth 630 may be configured as a pair so as to be respectively disposed on the upper and lower portions of the stator body 620 . Here, the stator tooth 630 may be divided into a first stator tooth disposed above the stator body 620 and a second stator tooth disposed below the stator body 620 .

The stator tooth 630 may include a ring-shaped stator tooth body and a plurality of teeth spaced apart from each other along an inner circumferential surface of the stator tooth body.

In addition, the stator tooth 630 may include protrusions disposed to be spaced apart from each other along the outer circumferential surface of the stator tooth body. Here, the tooth and the protrusion may be formed to protrude in the same direction. In addition, the stator tooth body, the teeth, and the protrusion may be integrally formed.

The stator tooth body may partially overlap the collector 700 in the axial direction.

The tooth may be formed to protrude from the inner circumferential surface of the stator tooth body in the axial direction. In addition, the teeth may be disposed to be spaced apart from each other along the circumferential direction of the inner circumferential surface of the stator body 620 . For example, the teeth may be arranged in a form that engages with each other at regular intervals.

Also, the tooth may be disposed to correspond to the magnet 530 .

The protrusion may be formed to protrude from the outer circumferential surface of the stator tooth body in the axial direction.

The protrusion may be fixed to the outer surface of the stator body 620 by caulking. For example, since the protrusion is coupled to the outer surface of the stator body 620 by a caulking method in which one side of the protrusion is pressed and bent, assembling tolerance does not occur.

Meanwhile, in one stator tooth 630, the tooth and the protrusion may be disposed so as not to overlap with each other in the radial direction. Here, the protrusion height in the axial direction of the protrusion may be smaller than the protrusion height of the tooth.

That is, when viewed from the radial direction, the protrusion may be disposed between the teeth. When viewed from the radial direction, if the protrusion is disposed to overlap the teeth, the magnetic field may be affected. Therefore, the effect on the magnetic field may be prevented by disposing the protrusion between the teeth in the radial direction.

In addition, the protrusion may be provided with at least two protrusions spaced apart from each other. Since the protrusion including at least two protrusions may implement a double caulking structure, the coupling force of the protrusion to the stator body 620 may be further improved. In addition, since the double caulking structure increases the contact area with the stator body 620, it is possible to increase the caulking force in the rotational direction of the protrusion.

The collector 700 enables the sensor 800 to detect a change in magnet flux generated by a rotation difference according to the twist of the input shaft and the output shaft. Here, the collector 700 may be formed of a metal material.

Two of the collectors 700 may be disposed to correspond to each of the pair of stator teeth 630 to collect the magnet flux. Here, the collector 700 may be divided into a first collector 700a and a second collector 700b according to an arrangement position.

The collector 700 may be disposed adjacent to the stator tooth 630 . Here, the adjacency may mean being disposed to be in contact or spaced apart from each other at a predetermined interval.

The collector 700 may include a plate part and a pair of legs extending to protrude from the plate part in the axial direction. Here, the plate part and the pair of legs may be integrally formed, and may be formed by cutting a plate-shaped plate and then bending it.

The plate part may be formed in a plate shape. In addition, the plate part may be disposed adjacent to the stator tooth body.

Two of the legs may be formed to protrude in the axial direction from the plate part of the plate part. In this case, the end of the leg may be bent to correspond to the sensor 800 .

The sensor 800 may be disposed on the circuit board 900 . Here, two sensors 800 may be disposed to correspond to the legs of the collector 700 .

As torsion occurs between the input shaft and the output shaft, a rotation difference between the rotor 500 and the stator 600 may occur. And, this rotation difference is detected as a change in the magnet flux through the stator tooth 630 , the collector 700 , and the sensor 800 . Accordingly, the sensor 800 may measure a torque capable of smoothly adjusting the steering wheel. Here, a Hall IC may be provided as the sensor 800 .

A sensor 800 for sensing the magnet flux may be disposed on the circuit board 900 . Here, the circuit board 900 may be a printed circuit board.

In addition, the inner side of the circuit board 900 may include a curved surface formed to correspond to the stator body 620 of the stator 600 . In addition, the circuit board 900 may be disposed on the outside of the stator body 620 with respect to the radial direction.

Although the above has been described with reference to the preferred embodiment of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as described in the claims below. You will understand that it can be done.

1: motor
100: case 200: middle case
220: first projection 230: second projection
240: guide
300: upper case 330: first hook
331: body portion 332: hook portion
333: home
400: lower case 430: second hook
432: step
500: rotor
600: stator
700: collector
800: sensor
900: circuit board

Claims (10)

case;
a stator disposed inside the case;
a rotor disposed to correspond to the stator;
a collector disposed to correspond to the stator;
a sensor disposed to correspond to the collector; and
It includes a substrate on which the sensor is disposed,
The case includes a middle case having a first protrusion and a second protrusion formed therein, an upper case having a first hook coupled to the first protrusion, and a lower case having a second hook coupled to the second protrusion,
The first hook is disposed to cover a partial area of the second hook. According to claim 1,
The first hook includes a body portion disposed on the outer surface of the upper case and a hook portion formed to protrude from the body portion in the axial direction,
A groove is formed concavely in the axial direction on the lower surface of the body part,
A portion of the second hook is disposed in the groove. 3. The method of claim 2,
The groove is formed on the inner edge side of the body portion,
One edge of the second hook is a sensing device disposed in the groove. 4. The method of claim 3,
A lower edge of the body portion is disposed to cover a partial region of the second hook. 3. The method of claim 2,
The first hook is formed on a curved surface of the outer surface,
The hook portion is a sensing device disposed to be spaced apart from the curved surface in a radial direction. 3. The method of claim 2,
A step is formed at one edge of the second hook,
A sensing device in which one edge of the body portion is disposed on the step. 3. The method of claim 2,
A first hole is formed in the hook portion,
A sensing device in which the first protrusion is disposed in the first hole. 3. The method of claim 2,
The second hook includes a second hole,
A sensing device in which the second protrusion is disposed in the second hole. According to claim 1,
The middle case is a sensing device further comprising a guide for guiding the first hook and the second hook. case;
a stator disposed inside the case;
a rotor disposed to correspond to the stator;
a collector disposed to correspond to the stator;
a sensor disposed to correspond to the collector; and
It includes a substrate on which the sensor is disposed,
The case includes a middle case having a first protrusion and a second protrusion formed therein, an upper case having a first hook coupled to the first protrusion, and a lower case having a second hook coupled to the second protrusion,
The first hook is a sensing device including a groove to which an edge of the second hook is coupled.

Images