Sensor device

Abstract

Embodiments provide a sensor device comprising: a rotor; a stator arranged to correspond to the rotor; a first shield and a second shield disposed on one side of the stator; a first collector and a second collector disposed between the first shield and the second shield; a Hall sensor disposed between the first collector and the second collector; and a first housing and a second housing disposed outside the first collector and the second collector, in which: the first housing includes a first guide protruding from an outer surface of the first housing to form an accommodation space of the second shield on an inner side thereof; the second housing includes a second guide protruding from an outer surface of the second housing to form an accommodating space of the first shield on an inner side thereof. And the first housing includes a first cover disposed in the first guide to overlap in an axial direction of the second shield.

Description

Technical Field

[0001] Embodiments relate to sensor devices. Background Art

[0002] The power steering system (electronic power system, hereinafter referred to as "EPS") drives a motor through an electronic control unit according to driving conditions to ensure steering stability and provide quick recovery, thereby enabling the driver to drive safely.

[0003] The EPS includes a sensor system that measures steering shaft torque and steering angle to provide appropriate torque. The sensor system also measures the degree of twisting in the torsion bar. The torsion bar consists of an input shaft connecting the steering shaft to the handlebars, an output shaft connected to the power transmission components on the wheel side, and a member connecting the input and output shafts.

[0004] The sensor device consists of a housing, a rotor, a stator with stator teeth, and a collector. In this case, the collector is located outside the stator teeth. Therefore, when an external magnetic field is generated, the collector acts as a path for the field, affecting the sensor's magnetic flux. This influence causes the sensor's output to change, making it impossible to accurately measure the degree of torsion in the torsion bar.

[0005] Meanwhile, in the case of a sensor device, a shield may be installed on the outer surface of the housing to reduce the influence of an external magnetic field. However, when the shield is lifted off the housing or its position is changed due to an external impact, the lifting and change may have a negative impact on the performance of the sensor device. Summary of the Invention

[0006] [Technical Issues]

[0007] The embodiment is directed to providing a sensor device capable of preventing a sensor from being affected by external magnetism and preventing a position of a shield from being deformed.

[0008] [Technical Solution]

[0009] An embodiment may provide a sensor device comprising: a rotor; a stator, which is arranged to correspond to the rotor; a first shield and a second shield, which are arranged on one side of the stator; a first collector and a second collector, which are arranged between the first shield and the second shield; a Hall sensor, which is arranged between the first collector and the second collector; and a first shell and a second shell, which are arranged on the outside of the first collector and the second collector, wherein the first shell includes a first guide, which protrudes from the outer surface of the first shell and forms a accommodating space for the second shield on its inner side, the second shell includes a second guide, which protrudes from the outer surface of the second shell and forms a accommodating space for the first shield on its inner side, and the first shell includes a first cover, which is arranged on the first guide to overlap with the second shield in the axial direction.

[0010] [Beneficial Effects]

[0011] In an embodiment, the external magnetic field is prevented from flowing to the collector by a shield separated from the collector, and the external magnetic field is allowed to flow, thereby preventing the sensor from being affected by the external magnetic field.

[0012] In the embodiment, the guide member for fixing the shielding member is provided, so that there is an advantage in preventing the shielding member from moving in a direction perpendicular to the axial direction due to an external force so as to cause a change in its position.

[0013] In the embodiment, the cover covering the shield is provided, so that there is an advantage in preventing the shield from moving in the axial direction and rising due to an external force.

[0014] In an embodiment, a chamfered surface is formed on the cover covering the shield, so that there is an advantage in guiding the shield not to be caught on the cover when the shield is inserted into the cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view showing a sensor device according to an embodiment.

[0016] Figure 2 It shows Figure 1 A perspective view of the interior of the sensor device is shown.

[0017] Figure 3 It shows Figure 1 A perspective view of a first shield and a second shield of a sensor device is shown.

[0018] Figure 4 It is a diagram showing a state of the first shield, the second shield, the first collector, and the second collector before assembly.

[0019] Figure 5 It is a side view of the assembled state of the first shield, the second shield, the first collector and the second collector.

[0020] Figure 6 is a perspective view showing the first shielding member.

[0021] Figure 7 is a perspective view showing the second shielding member.

[0022] Figure 8 is a perspective view showing the first collector.

[0023] Figure 9 is a perspective view showing the second collector.

[0024] Figure 10 yes Figure 1 A side cross-sectional view of one side of a sensor device is shown.

[0025] Figure 11 yes Figure 1 A side cross-sectional view of the other side of the sensor device is shown.

[0026] Figure 12 is a diagram showing the flow of a magnetic field when there is no external magnetic field.

[0027] Figure 13 is a diagram showing the flow of a magnetic field when an external magnetic field exists in the axial direction.

[0028] Figure 14 is a diagram showing the flow of a magnetic field when an external magnetic field exists in the radial direction.

[0029] Figure 15 is a perspective view of a sensor device showing a housing according to a modified example.

[0030] Figure 16 1 is an exploded view of the housing and the first and second shielding members.

[0031] Figure 17 It is a view showing a first guide and a first cover provided in the first housing.

[0032] Figure 18 FIG. 1 is a diagram showing the second shielding member fixed by the first guide member and the first cover.

[0033] Figure 19 is a view showing a second guide provided in the second housing.

[0034] Figure 20 FIG. 1 is a diagram showing the second shielding member fixed by the first guide member and the first cover.

[0035] Figure 21 It is a view showing the first shield and the third housing.

[0036] Figure 22 It is along Figure 15 A side sectional view taken along line AA.

[0037] Figure 23 is a view of a second housing including a second cover according to a modified example.

[0038] Figure 24 It is a view showing the third housing that prevents the first shield from being lifted or bent. DETAILED DESCRIPTION

[0039] Hereinafter, a direction perpendicular to the axial direction of the sensor device is referred to as a radial direction, and a direction along a circle having a radial radius centered on the axis is referred to as a circumferential direction.

[0040] Figure 1 is a perspective view showing a sensor device according to an embodiment, Figure 2 It shows Figure 1 A perspective view of the interior of the sensor device is shown, and Figure 3 It shows Figure 1 A perspective view of a first shield and a second shield of a sensor device is shown.

[0041] Reference Figures 1 to 3 , the sensor device according to the embodiment may include a rotor 100, a stator 200, a first shield 300, a second shield 400, a first collector 500, a second collector 600, and a Hall sensor 700. In the figure, the x-axis represents a direction perpendicular to the axial direction, the y-axis represents a direction perpendicular to the axial direction and perpendicular to the direction indicated by the x-axis, and the z-axis represents the axial direction.

[0042] Here, the stator 200 may be connected to an output shaft (not shown), and the rotor 100, at least a portion of which is rotatably disposed on the stator 200, may be connected to an input shaft (not shown), but is not necessarily limited thereto. In this case, the rotor 100 may be arranged to rotate relative to the stator 200. Hereinafter, the inner side may refer to a direction disposed toward the center with the radial direction as a reference, and the outer side may refer to a direction opposite to the inner side.

[0043] The sensor device according to the embodiment has a feature of preventing the external magnetic field from affecting the Hall sensor 700 by guiding the external magnetic field to escape through the first shield 300 and the second shield 400 without flowing toward the first collector 500 or the second collector 600 in an environment where the external magnetic field acts.

[0044] The rotor 100 may include a magnet. The magnet may be disposed inside the stator 200. The magnet may be connected to the input shaft through a separate holder.

[0045] The housing 10 is disposed outside the stator 200. The housing 80 may include an upper housing 11 and a lower housing 12. The stator 200, the first shield 300, the second shield 400, the first collector 500, and the second collector 600 may be fixed to the housing 80.

[0046] The first shield 300 may be provided in the axial direction from the first side toward the second side of the stator 200. The second shield 400 may be provided in the axial direction from the second side toward the first side of the stator 200. The first side is one side of the stator 200 in the axial direction, and the second side is the other side of the stator 200 in the axial direction.

[0047] Each of the first collector 500 and the second collector 600 is provided to correspond to the Hall sensor 700 .

[0048] The substrate S may be disposed between the first collector 500 and the second collector 600 .

[0049] The Hall sensor 700 is provided on the substrate S. The Hall sensor 700 is provided between the first collector 500 and the second collector 600 to detect changes in the magnetic field generated between the stator 200 and the rotor 100. The Hall sensor 700 may be a Hall IC. Based on the detected magnetic field changes, the sensor device measures torque.

[0050] The first shield 300 and the second shield 400 may have the same shape and size, but their positions may be different. The first collector 500 and the second collector 600 may have the same shape and size, but their positions may be different.

[0051] In the axial direction, the first collector 500 and the second collector 600 are each located between the first shield 300 and the second shield 400. Therefore, the first and second collectors 500 and 600 can be protected from external magnetic fields by the first and second shields 300 and 400.

[0052] Figure 4 1 is a diagram showing a state of the first shield 300 , the second shield 400 , the first collector 500 , and the second collector 600 before assembly.

[0053] Reference Figure 1 and Figure 4The first collector 500 is assembled to one side of the stator 200 in the axial direction. The second collector 600 is assembled to the other side of the stator 200 in the axial direction. The first shield 300 and the second shield 400 can be assembled to the outside of the stator 200 in the radial direction. First, the first collector 500 and the second collector 600 can be assembled to the housing 800, and then the first shield 300 and the second shield 400 can be inserted and assembled to the housing 800 in the radial direction.

[0054] Figure 5 3 is a side view of an assembled state of the first shield 300 , the second shield 400 , the first collector 500 , and the second collector 600 .

[0055] Reference Figure 5 The first shield 300 is provided separately from the first collector 500 and the second collector 600. The second shield 400 is also provided separately from the first collector 500 and the second collector 600. This is to prevent the external magnetic field from flowing toward the first collector 500 and the second collector 600 through the first shield 300 or the second shield 400.

[0056] The inner end of the first shield 300 is arranged to overlap with the stator 200 to form an axial overlap region. The inner end of the second shield 400 is also arranged to overlap with the stator 200 in the axial direction.

[0057] The first collector 500 and the second collector 600 are disposed between the first shield 300 and the second shield 400 based on the axial direction.

[0058] Figure 6 is a perspective view showing the first shielding member 300 .

[0059] Reference Figure 6 , the first shield 300 includes a first region 310, a second region 320, a third region 330, and a first bent portion 340. The first region 310, the second region 320, the third region 330, and the first bent portion 340 are described separately, but they may be one member connected to each other.

[0060] The first region 310 is located at a first side of the stator 200. The first region 310 may be disposed along a plane perpendicular to the axial direction. As the size of the first region 310 increases, the influence of the external magnetic field may be reduced.

[0061] The second region 320 is located at the second side of the stator 200. The second region 320 may also be arranged along a plane perpendicular to the axial direction. The inner edge of the second region 320 has a curved surface.

[0062] The third region 330 connects the first region 310 and the second region 320. The third region 330 may include a plurality of curved regions. At least three of the plurality of curved regions of the third region 330 may have different curved directions.

[0063] For example, the third region 330 may include a first portion 331 bent vertically downward from one side of the first region 310 and a second portion 332 bent vertically from the first portion 331. In addition, the third region 330 may include a third portion 333 bent vertically downward from the second portion 332, a fourth portion 334 bent vertically from the third portion 333 to be disposed facing the second portion 332, and a fifth portion 335 bent vertically downward from the fourth portion 334 to be connected to the second region 320.

[0064] The second portion 332 forms a first contact surface S1 in contact with the housing 800. The fourth portion 334 forms a second surface S2 in contact with the housing 800. In addition, the third portion 333 forms a third surface S3 connected to the first contact surface S1 and the second surface S2 when the third portion 333 contacts the housing 800.

[0065] The first bent portion 340 is bent downward from the other side of the first region 310. As the size of the first bent portion 340 increases, the influence of the external magnetic field may be reduced.

[0066] Figure 7 is a perspective view showing the second shielding member 400 .

[0067] Reference Figure 7 The second shield 400 includes a fourth region 410, a fifth region 420, a sixth region 430, and a second bent portion 440. The fourth region 410, the fifth region 420, the sixth region 430, and the second bent portion 440 are described separately, but they may be one member connected to each other.

[0068] The fourth region 410 is located at the second side of the stator 200. The fourth region 410 may be disposed along a plane perpendicular to the axial direction. As the size of the fourth region 410 increases, the influence of the external magnetic field may be reduced.

[0069] The fifth region 420 is located on the first side of the stator 200. The fifth region 420 may also be arranged along a plane perpendicular to the axial direction. An inner edge of the fifth region 420 has a curved surface.

[0070] The sixth region 430 connects the fourth region 410 and the fifth region 420. The sixth region 430 may include a plurality of curved regions, and at least three of the plurality of curved regions of the sixth region 430 may have different curved directions.

[0071] For example, the sixth region 430 may include a sixth portion 431 bent vertically downward from the other side of the fourth region 410 and a seventh portion 432 bent vertically from the sixth portion 431. In addition, the sixth region 430 may include an eighth portion 433 bent vertically downward from the seventh portion 432, a ninth portion 434 bent vertically from the eighth portion 433 to face the seventh portion 432, and a tenth portion 435 bent vertically downward from the ninth portion 434 to connect to the fifth region 420.

[0072] The seventh portion 432 forms a fourth surface S4 in contact with the housing 800. The ninth portion 434 forms a fifth surface S5 in contact with the housing 800. In addition, the eighth portion 433 forms a sixth surface S6 connected to the fourth surface S4 and the fifth surface S5 when the eighth portion 433 contacts the housing 800.

[0073] The second bent portion 440 is bent upward from one side of the fourth region 410. As the size of the second bent portion 440 increases, the influence of the external magnetic field may be reduced.

[0074] Figure 8 is a perspective view showing the first collector 500 .

[0075] Reference Figure 8 The first collector 500 may include a first body 510, a first leg 520, and a first extension 530. The first leg 520 is disposed so as to bend downward on both sides of the first body 510 to face the Hall sensor 700. The first extension 530 extends into the first body 510. The first extension 530 is disposed so as to overlap with the stator 200 in the axial direction. The inner edge of the first extension 530 is formed as a curved surface.

[0076] Figure 9 is a perspective view showing the second collector 600 .

[0077] Reference Figure 9 The second collector 600 may include a second body 610, a second leg 620, and a second extension 630. The second leg 620 is disposed so as to bend downward on both sides of the second body 610 to face the Hall sensor 700. The second extension 630 extends into the second body 610. The second extension 630 is disposed so as to overlap with the stator 200 in the axial direction. The inner edge of the second extension 630 is formed as a curved surface.

[0078] Figure 10 yes Figure 1 A side cross-sectional view of one side of a sensor device is shown.

[0079] Reference Figure 6 and Figure 10The first shielding member 300 is disposed outside the housing 800. Furthermore, the first shielding member 300 contacts the outer surface of the housing 800. A first contact surface S1 of the first shielding member 300 contacts the upper surface 801 of the housing 800. A second surface S2 of the first shielding member 300 contacts the lower surface 802 of the housing 800. Furthermore, a third surface S3 of the first shielding member 300 contacts the side surface 803 of the housing 800.

[0080] Figure 11 yes Figure 1 A side cross-sectional view of the other side of the sensor device is shown.

[0081] Reference Figure 7 and Figure 11 The second shielding member 400 is disposed outside the housing 800. Furthermore, the second shielding member 400 contacts the outer surface of the housing 800. A fourth surface S4 of the second shielding member 400 contacts the upper surface 801 of the housing 800. A fifth surface S5 of the second shielding member 400 contacts the lower surface 802 of the housing 800. Furthermore, a sixth surface S6 of the second shielding member 400 contacts the side surface 803 of the housing 800.

[0082] In this manner, by each of the first shield 300 and the second shield 400 being in contact with the side surface of the housing 800 , each of the first shield 300 and the second shield 400 can be stably fixed to the housing 800 .

[0083] Figure 12 is a diagram showing the flow of magnetic field in the absence of an external magnetic field.

[0084] Reference Figure 12 (820), in the absence of an external magnetic field, the magnetic field flow generated between the rotor 100 and the stator 200 is only between the first collector 500 and the second collector 600 as in Figure 12 The first collector 500 and the second collector 600 transmit the magnetic field flow generated between the rotor 100 and the stator 200 to the Hall sensor 700 .

[0085] Figure 13 is a diagram showing a magnetic field flow when an external magnetic field exists in the axial direction.

[0086] Reference Figure 6 and Figure 13 (820), in the presence of an external magnetic field in the axial direction, e.g. Figure 13 As shown in K2 , the external magnetic field at a position outside the stator 200 toward the first collector 500 and the second collector 600 flows into the first region 310 of the first shield 300 and is guided to the second region 320 and escapes outward, rather than flowing toward the first collector 500 or the second collector 600 .

[0087] When viewed in the axial direction, the first region 310 of the first shield 300 covers each of the first collector 500, the sensor 700, and the second collector 600. Specifically, the first region 310 is arranged to overlap the first body 510 and the second leg 520 of the first collector 500 in the axial direction. In addition, the first shield 300 is separated from the first collector 500. This can prevent an external magnetic field from flowing toward the first collector 500.

[0088] In addition, in the presence of an external magnetic field in the axial direction, such as Figure 13 As shown in K3 , the external magnetic field toward the stator 200 flows into the fifth region 420 of the second shield 400 and is guided to the fourth region 410 and escapes outward, rather than flowing toward the first collector 500 or the second collector 600 .

[0089] Since the second region 320 is arranged to overlap with the second extension portion 630 of the second collector 600 in the axial direction, the second region 320 is separated from the second collector 600, and the fourth region 410 is arranged to overlap with the second body 610 and the second leg 620 in the axial direction, and the fourth region 410 is separated from the second collector 600, even in Figure 13 In the case where an external magnetic field is generated upward or downward, the external magnetic field can be prevented from flowing toward the first collector 500 or the second collector 600 as described above.

[0090] When viewed in the axial direction, since the fifth region 420 completely covers the first collector 500 and the first shield 300 is separated from the first collector 500 , an external magnetic field toward the stator 200 may be prevented from flowing toward the first collector 500 .

[0091] In this case, the size of the fifth region 420 is formed to be larger than the size of the first extension portion 530 so as to cover the first extension portion 530 of the first collector 500 when viewed in the axial direction. In addition, the shape of the fifth region 420 can be formed to correspond to the shape of the first extension portion 530. Therefore, when viewed in the axial direction, the first shield 300 is provided so that the first extension portion 530 is completely covered by the first region 310.

[0092] Figure 14 is a diagram showing a magnetic field flow when an external magnetic field exists in the radial direction.

[0093] Reference Figure 14 (820), when there is an external magnetic field in the radial direction, e.g. Figure 14As shown in K4 , the external magnetic field toward the first collector 500 and the second collector 600 flows into the first bent portion 340 of the first shield 300 and is guided to the outside instead of flowing toward the first collector 500 or the second collector 600 .

[0094] In addition, another external magnetic field toward the first collector 500 and the second collector 600 flows into the second shield 400 , is guided to the second bent portion 440 , and escapes outside, rather than flowing toward the first collector 500 or the second collector 600 .

[0095] Table 1 below compares a shift in a sensing value based on an external magnetic field in a sensor device according to a comparative example and a shift in a sensing value based on an external magnetic field in a sensor device according to an embodiment.

[0096] Here, in the comparative example, the sensor device includes collectors disposed on the first and second sides of the stator, respectively, without a separate shielding device. As shown in Table 1, in the presence of an external magnetic field acting in directions perpendicular to the axial direction (the first direction (x) and the second direction (y)), it can be confirmed that the offset of the sensing value of the comparative example and the offset of the sensing value of the embodiment are almost the same. However, in the presence of an external magnetic field acting in the axial direction, the offset of the sensor device according to the embodiment is very low, at 1 / 40 of the offset of the sensing value according to the comparative example, confirming that the influence of the external magnetic field acting in the axial direction is relatively small in the embodiment compared to the comparative example.

[0097]

[0098]

[0099] Figure 15 is a perspective view showing a sensor device of a housing 800 according to a modified example, and Figure 16 1 is an exploded view of the housing 800 , the first shielding member 300 , and the second shielding member 400 .

[0100] Reference Figure 15 and Figure 16 , the housing 800 may include a first housing 810, a second housing 820, and a third housing 830. The second housing 820 may be disposed between the first housing 810 and the second housing 820 in the axial direction.

[0101] The first shield 300 may be mounted on the housing 800 in a direction perpendicular to the axial direction. The second shield 400 may also be mounted on the housing 800 in a direction perpendicular to the axial direction.

[0102] Figure 17 810 is a view showing a first guide 811 and a first cover 812 provided in the first housing 810 .

[0103] Reference Figure 17 The first housing 810 may include a seventh surface S7 on an outer surface of one side thereof in the axial direction, which contacts the second shield 400. The seventh surface S7 is disposed to face the fifth region 420 of the second shield 400. The seventh surface S7 may contact the fifth region 420 of the second shield 400.

[0104] The first housing 810 includes a first guide 811. The first guide 811 is used to fix the fifth region 420 of the second shield 400 to the first housing 810, thereby preventing the second shield 400 from moving in a direction perpendicular to the axial direction due to external force and causing its position to change.

[0105] The first guide 811 is provided to protrude from the seventh surface S7 in the axial direction. The first guide 811 may include a first side guide 811a and a first inner guide 811b. The first guide 811 may have a shape corresponding to the shape of the fifth region 420 of the second shield 400.

[0106] A pair of first side guides 811a are provided separately from each other. A first inner guide 811b is connected to the ends of the pair of first side guides 811a. These first side guides 811a and the first inner guide 811b form a storage space for the fifth region 420 of the second shield 400. The first side guide 811a can be provided on a straight line corresponding to the side surface of the fifth region 420. The first inner guide 811b can be formed into a circular shape corresponding to the inner edge of the fifth region 420.

[0107] When the second shield 400 is inserted into the first housing 810 in a direction perpendicular to the axial direction, the fifth region 420 is positioned inside the first guide 811 while moving along the seventh surface S7 .

[0108] The first cover 812 may be provided at an end portion of the first guide 811 in the axial direction. The first cover 812 may be separated from the seventh surface S7 in the axial direction. The first cover 812 may be provided to overlap with the seventh surface S7 in the axial direction.

[0109] Figure 18 81 is a diagram illustrating the second shielding member 400 fixed by the first guide 811 and the first cover 812 .

[0110] Reference Figure 17 and Figure 18The first side guide 811a is disposed so as to face the side surface of the fifth region 420 so as to be in contact with the side surface of the fifth region 420. The first inner guide 811b is disposed so as to face the inner edge 401 of the fifth region 420 so as to be in contact with the inner edge 401 of the fifth region 420. The first guide 811 secures the second shield 400 so as not to move in a direction perpendicular to the axial direction.

[0111] In addition, the first cover 812 is provided to overlap with the fifth region 420 in the axial direction to fix the second shield 400 in the axial direction, thereby preventing the second shield 400 from being lifted up due to an external force.

[0112] Figure 19 820 is a view showing a second guide 821 provided in the second housing 820 .

[0113] Reference Figure 19 The second housing 820 may include an eighth surface S8 on an outer surface of one side thereof in the axial direction, which contacts the first shield 300. The eighth surface S8 is disposed to face the second region 320 of the first shield 300. The eighth surface S8 may contact the second region 320 of the first shield 300.

[0114] The second housing 820 includes a second guide 821. The second guide 821 is used to fix the second region 320 of the first shield 300 to the second housing 820, thereby preventing the first shield 300 from moving in a direction perpendicular to the axial direction due to external force and changing its position.

[0115] The second guide 821 is provided to protrude from the eighth surface S8 in the axial direction. The second guide 821 may include a second side guide 821 a. The second guide 821 may have a shape corresponding to the shape of the second region 320 of the first shield 300.

[0116] A pair of second side guides 821a are provided separately from each other. The second housing 820 may include a sliding portion 823. The sliding portion 823 is a portion that contacts the main gear to guide the rotation of the main gear. The sliding portion 823 is connected to the ends of the pair of second side guides 821a.

[0117] These second side guides 821a and the sliding portion 823 form an accommodation space of the second region 320 of the first shield 300. The second side guides 821a may be provided on a straight line corresponding to a side surface of the second region 320. The sliding portion 823 may be formed in a circular shape.

[0118] When the first shield 300 is inserted into the second housing 820 in a direction perpendicular to the axial direction, the second region 320 is positioned inside the second guide 821 while moving along the eighth surface S8 .

[0119] Figure 20 81 is a diagram illustrating the second shielding member 400 fixed by the first guide 811 and the first cover 812 .

[0120] Reference Figure 19 and Figure 20 The second side guide member 821a is provided so as to face the side surface of the second region 320 so as to be in contact with the side surface. The sliding portion 823 is provided so as to face the inner edge 321 of the second region 320 so as to be in contact with the inner edge 321 of the second region 320. These second guide member 821 and sliding portion 823 secure the first shield 300 so as not to move in a direction perpendicular to the axial direction.

[0121] Figure 21 3 is a view showing the first shield 300 and the third housing 830 .

[0122] Reference Figure 21 The third housing 830 may include a third cover 831. The third cover 831 protrudes from the inner surface of the third housing 830 in the axial direction. The third cover 831 is arranged to overlap with the second region 320 of the first shield 300 in the axial direction. When viewed in the axial direction, the shape of the third cover 831 may be arranged to correspond to the second region 320 as a whole.

[0123] The third cover 831 fixes the first shielding member 300 in the axial direction, thereby preventing the first shielding member 300 from being lifted up due to external force.

[0124] Figure 22 It is along Figure 15 A side sectional view taken along line AA.

[0125] Reference Figure 22 The first cover 812 of the first housing 810 includes a first inner surface 812a facing the first shield 300. Furthermore, the first inner surface 812a may include a first chamfered surface 812b. The first chamfered surface 812b may be formed to the outer end of the first cover 812. The first chamfered surface 812b is formed such that the axial thickness of the first cover 812 decreases as the first cover 812 moves toward the outside of the first cover 812. This first chamfered surface 812b has the advantage of guiding the second shield 400 from getting stuck on the first cover 812 when the second shield 400 is inserted into the first cover 812.

[0126] Figure 23is a diagram illustrating a second housing 820 including a second cover 822 according to a modified example.

[0127] Reference Figure 23 The second housing 820 according to the modified example may include a second cover 822 and a second guide 821. The second cover 822 replaces the third cover 831 of the third housing 830 to prevent the first shield 300 from tilting in the axial direction. If the second housing 820 includes the second cover 822, the third cover 831 of the third housing 830 may be omitted.

[0128] The second cover 822 may be provided in the axial direction at an end portion of the second guide 821. The second cover 822 is separated in the axial direction from the seventh surface S7 of the second housing 820. The second cover 822 may be provided to overlap with the seventh surface S7 in the axial direction.

[0129] The second cover 822 is provided to overlap the second region 320 in the axial direction to fix the first shield 300 in the axial direction, thereby preventing the first shield 300 from being lifted up due to an external force.

[0130] One surface of the second cover 822 may be disposed on the same plane as the sliding surface 823 a of the sliding portion 823 .

[0131] Figure 24 1 and 2 are views illustrating the third housing 830 that prevents the first shield 300 from being lifted or bent.

[0132] Reference Figure 24 The third housing 830 may include a sidewall 832. The sidewall 832 may be positioned to overlap the second region 320 of the first shield 300 in the axial direction. The end of the sidewall 832 may be positioned adjacent to the second region 320 with a minimum gap G. Since the sidewall 832 is positioned directly adjacent to the second region 320, the second region 320 may be prevented from warping or bending in the axial direction. The end of the sidewall 832 may include a second chamfered surface 832a. The second chamfered surface 832a may be formed at the outer end of the sidewall 832.

[0133] The second chamfered surface has the advantage of guiding the first shield 300 from getting caught on the side wall 832 when the first shield 300 is inserted.

[0134] The above-described embodiments can be applied to various devices such as vehicles and home appliances.

Claims

1. A sensor device comprising: rotor; a stator, the stator being arranged to correspond to the rotor; a first shielding member and a second shielding member, wherein the first shielding member and the second shielding member are provided on one side of the stator; a first collector and a second collector, the first collector and the second collector being disposed between the first shield and the second shield; a Hall sensor disposed between the first collector and the second collector; as well as a first shell and a second shell, wherein the first shell and the second shell are arranged outside the first collector and the second collector, The first housing includes a first guide member protruding from an outer surface of the first housing and forming an accommodating space for the second shielding member on an inner side of the first housing. The second housing includes a second guide member that protrudes from an outer surface of the second housing and forms an accommodation space for the first shielding member on an inner side of the second housing, and The first housing includes a first cover provided on the first guide to overlap with the second shield in an axial direction.

2. The sensor device according to claim 1, wherein The first cover includes a first inner surface facing the second shield, and the first inner surface includes a first chamfered surface formed to an outer end of the first cover.

3. The sensor device according to claim 1, wherein The second housing includes a second cover provided on the second guide to overlap with the first shield in the axial direction.

4. The sensor device according to claim 1, comprising a third housing coupled to the second housing, in, The third housing includes a third cover provided so as to overlap with the first shield provided in the accommodation space of the second housing in the axial direction.

5. The sensor device according to claim 3, wherein The second housing includes a sliding portion that contacts a main gear of a holder coupled to the stator, and The second cover is connected to the sliding portion. The sensor device according to claim 5 , wherein: One surface of the second cover and a sliding surface of the sliding portion are disposed on the same plane.

7. The sensor device according to claim 3, wherein The first shield includes a first region located on a first side of the stator in the axial direction, a second region located on a second side of the stator, and a third region connecting the first region and the second region, and The second shield includes a fourth region located on a second side of the stator in the axial direction, a fifth region located on a first side of the stator, and a sixth region connecting the fourth region and the fifth region.

8. The sensor device according to claim 7, wherein The fifth region is provided inside the first guide and overlaps with the first cover in the axial direction.

9. The sensor device according to claim 7, wherein The second region is provided inside the second guide and overlaps with the second cover in the axial direction.

10. The sensor device according to claim 7, wherein The first guide member includes a first side guide member provided to correspond to a side surface of the fifth area and an inner guide member provided to correspond to an inner edge of the fifth area, and The second guide includes a second side guide provided to correspond to a side surface of the second area.

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