Sensor Device

Abstract

An embodiment may provide a sensor device including a rotor, a stator arranged to correspond to the rotor, first and second shields arranged on one side of the stator, first and second collectors arranged between the first and second shields, and a Hall sensor arranged between the first and second collectors, wherein the first shield is arranged spaced apart from the first and second collectors, and the second shield is arranged spaced apart from the first and second collectors.

Description

[Technical Field]

[0001] This embodiment relates to a sensor device. [Background technology]

[0002] The Electronic Power System (EPS) drives the motor with an electronic control unit according to driving conditions, ensuring cornering stability and providing quick recovery force, allowing the driver to drive safely.

[0003] The EPS includes a sensor device that measures the torque and steering angle of the steering shaft to provide the appropriate torque. The sensor device measures the degree of torsion of the torsion bar. The torsion bar is a component that connects the input shaft connected to the steering wheel of the steering shaft, the output shaft connected to the power transmission structure on the wheel side, and the input shaft and output shaft.

[0004] The sensor device includes a housing, a rotor, a stator including stator teeth, and a collector. The collector is located outside the stator teeth. Therefore, when an external magnetic field is generated, the collector acts as a passage for the external magnetic field, which can affect the magnetic flux value of the sensor. If the sensor is affected in this way, the output value of the sensor device changes, making it difficult to accurately measure the degree of torsion of the torsion bar. Summary of the Invention [Problem to be solved by the invention]

[0005] The embodiment aims to provide a sensor device that can prevent the sensor from being affected by external magnetism. [Means for solving the problem]

[0006] An embodiment may provide a sensor device including a rotor, a stator arranged to correspond to the rotor, first and second shields arranged on one side of the stator, first and second collectors arranged between the first and second shields, and a Hall sensor arranged between the first and second collectors, wherein the first shield is arranged spaced apart from the first and second collectors, and the second shield is arranged spaced apart from the first and second collectors.

[0007] The first shield may include 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 may include a fourth region located on the second side of the stator in the axial direction, a fifth region located on the first side of the stator, and a sixth region connecting the fourth region and the fifth region.

[0008] The second region may be arranged to overlap the stator in the axial direction, and the fourth region may be arranged to overlap the stator in the axial direction.

[0009] The first shield may include a first bent portion bent from an end of the first region toward the second shield, and the second shield may include a second bent portion bent from an end of the second region toward the first shield.

[0010] The first collector may include a first body, a first leg bent from the first body toward the Hall sensor, and a first extension portion arranged from the first body to overlap with the stator in the axial direction, and the shape of the fifth region overlapping with the stator in the axial direction may be arranged to correspond to the shape of the first extension portion, and the size of the fifth region may be larger than the size of the first extension portion so as to completely cover the first extension portion in the axial direction.

[0011] The first region may be disposed to axially overlap the first body and the first leg.

[0012] The second collector may include a second body, a second leg bent from the second body toward the Hall sensor, and a second extension portion arranged from the second body to overlap with the stator in the axial direction, wherein the shape of the fourth region is arranged to correspond to the shape of the second extension portion, and the size of the second region may be larger than the size of the first extension portion so as to completely cover the first extension portion in the axial direction.

[0013] The fourth region may be disposed to axially overlap the first body and the first leg.

[0014] The third region and the sixth region may each include a plurality of bent regions, and at least three of the bent regions may be bent in different directions.

[0015] The stator further includes a housing disposed outside the stator, the third region including a first surface in contact with an upper surface of the housing, a second surface in contact with a lower surface of the housing, and a third surface connecting the first surface and the second surface and in contact with a side surface of the housing, and the sixth region including a fourth surface in contact with the upper surface of the housing, a fifth surface in contact with the lower surface of the housing, and Fourth Surface and above No. 5 and a sixth surface connecting the first surface and the second surface and contacting a side surface of the housing. [Effects of the Invention]

[0016] In this embodiment, an external magnetic field is prevented from flowing to the collector side through a shield spaced apart from the collector, and the external magnetic field is allowed to flow, thereby preventing the sensor from being affected by the external magnetic field. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view showing a sensor device according to an embodiment.

[0018] [Figure 2] FIG. 2 is a perspective view showing the inside of the sensor device shown in FIG.

[0019] [Figure 3] 2 is a perspective view showing a first shield and a second shield of the sensor device shown in FIG. 1. FIG.

[0020] [Figure 4] FIG. 2 is a diagram showing a state before the first shield, the second shield, the first collector, and the second collector are assembled.

[0021] [Figure 5] FIG. 2 is a side view showing a state in which the first shield, the second shield, the first collector, and the second collector are assembled.

[0022] [Figure 6] FIG. 2 is a perspective view showing a first shield.

[0023] [Figure 7] FIG. 4 is a perspective view showing a second shield.

[0024] [Figure 8] FIG. 2 is a perspective view showing a first collector.

[0025] [Figure 9] FIG. 2 is a perspective view showing a second collector.

[0026] [Figure 10] FIG. 2 is a side cross-sectional view of one side of the sensor device shown in FIG.

[0027] [Figure 11] 2 is a side cross-sectional view of the other side of the sensor device shown in FIG. 1. FIG.

[0028] [Figure 12]FIG. 10 is a diagram showing the flow of a magnetic field when there is no external magnetic field.

[0029] [Figure 13] FIG. 10 is a diagram showing the flow of a magnetic field when an external magnetic field is present in the axial direction.

[0030] [Figure 14] FIG. 10 is a diagram showing the flow of a magnetic field when an external magnetic field is present in the radial direction.

[0031] [Figure 15] FIG. 10 is a perspective view showing a first shield of a sensor device according to another embodiment of the present invention.

[0032] [Figure 16] FIG. 16 is a plan view of the first shield shown in FIG.

[0033] [Figure 17] FIG. 16 is a side view of the first shield shown in FIG.

[0034] [Figure 18] FIG. 4 is a perspective view showing a second shield.

[0035] [Figure 19] FIG. 19 is a plan view of the second shield shown in FIG.

[0036] [Figure 20] FIG. 19 is a side view of the second shield shown in FIG.

[0037] [Figure 21] 19 is a diagram showing the flow of a magnetic field in the first shield of FIG. 15 and the second shield of FIG. 18 when an external magnetic field is present in the axial direction.

[0038] [Figure 22] FIG.

[0039] [Figure 23]23 is a perspective view of the first housing shown in FIG. 22, as seen from the front. FIG.

[0040] [Figure 24] 23 is a perspective view of the first housing shown in FIG. 22, as seen from the rear. FIG.

[0041] [Figure 25] FIG. 2 is a front view of the sensor device shown in FIG.

[0042] [Figure 26] FIG. 2 is a plan view of the sensor device shown in FIG.

[0043] [Figure 27] FIG. 2 is a side view of the sensor device shown in FIG.

[0044] [Figure 28] FIG. 4 is an enlarged view showing the inside of the housing cover. DETAILED DESCRIPTION OF THE INVENTION

[0045] Hereinafter, the direction perpendicular to the axial direction of the sensor device will be referred to as the radial direction, and the direction along a circle having a radius in the radial direction at the axial center will be referred to as the circumferential direction.

[0046] FIG. 1 is a perspective view showing a sensor device according to an embodiment, FIG. 2 is a perspective view showing the interior of the sensor device shown in FIG. 1, and FIG. 3 is a perspective view showing a first shield and a second shield of the sensor device shown in FIG. 1.

[0047] 1 to 3, a sensor device according to an 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 drawings, the x-axis indicates a direction perpendicular to the axial direction, the y-axis indicates a direction perpendicular to the direction indicated by the x-axis, which is perpendicular to the axial direction, and the z-axis indicates the axial direction.

[0048] 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 limited thereto. In this case, the rotor 100 may be rotatably disposed relative to the stator 200. Hereinafter, the term "inner" may refer to a direction facing the center based on the radial direction, and the term "outer" may refer to a direction opposite to the inner side.

[0049] The sensor device of the embodiment has the characteristic that, in an environment where an external magnetic field is active, the external magnetic field is guided through the first shield 300 and the second shield 400 so that it does not flow to the first collector 500 or the second collector 600 but instead escapes, thereby preventing the external magnetic field from affecting the Hall sensor 700.

[0050] 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 via a separate holder.

[0051] Housing on the outside of the stator 200 Gu800 The housing is placed Gu800 The upper housing Gu and Lower housing Gu and The stator 200, the first shield 300, the second shield 400, the first collector 500, and the second collector 600 are arranged in a housing. Gu800 can be fixed at

[0052] The first shield 300 may be disposed axially from a first side to a second side of the stator 200. The second shield 400 may be disposed axially from a second side to a first side of the stator 200. The first side refers to one side of the stator 200 in the axial direction, and the second side refers to the other side of the stator 200 in the axial direction.

[0053] The first collector 500 and the second collector 600 are disposed corresponding to the Hall sensors 700, respectively.

[0054] The substrate S may be disposed between the first collector 500 and the second collector 600 .

[0055] The Hall sensor 700 is disposed on the substrate S. The Hall sensor 700 is disposed 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, respectively. The Hall sensor 700 may be a Hall IC. Based on the detected changes in the magnetic field, the sensor device measures torque.

[0056] The first shield 300 and the second shield 400 may be identical in shape and size, but differ in position. The first collector 500 and the second collector 600 may also be identical in shape and size, but differ in position.

[0057] With respect to the axial direction, the first collector 500 and the second collector 600 are respectively located between the first shield 300 and the second shield 400. Therefore, the first collector 500 and the second collector 600 can be protected from an external magnetic field via the first shield 300 and the second shield 400.

[0058] FIG. 4 is a diagram showing the first shield 300, the second shield 400, the first collector 500, and the second collector 600 in a state before they are assembled.

[0059] 1 and 4, the 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 may be assembled to the outside of the stator 200 in the radial direction. After the first collector 500 and the second collector 600 are first assembled to the housing 800, the first shield 300 and the second shield 400 may be inserted in the radial direction and assembled to the housing 800.

[0060] FIG. 5 is a side view of the first shield 300, the second shield 400, the first collector 500, and the second collector 600 in an assembled state.

[0061] 5, the first shield 300 is disposed at a distance from the first collector 500 and the second collector 600. The second shield 400 is also disposed at a distance from the first collector 500 and the second collector 600. This is to prevent an external magnetic field from flowing toward the first collector 500 and the second collector 600 via the first shield 300 or the second shield 400.

[0062] The inner end of the first shield 300 is arranged to overlap with the stator 200 to form an overlapping region in the axial direction. The inner end of the second shield 400 is also arranged to overlap with the stator 200 in the axial direction.

[0063] The first collector 500 and the second collector 600 are disposed between the first shield 300 and the second shield 400 with respect to the axial direction.

[0064] FIG. 6 is a perspective view showing the first shield 300. As shown in FIG.

[0065] 6, the first shield 300 includes a first region 310, a second region 320, a third region 330, and a first bent portion 340. Although the first region 310, the second region 320, the third region 330, and the first bent portion 340 have been described as separate regions, they may be connected to each other as a single member.

[0066] The first region 310 is located on a first side of the stator 200. The first region 310 may be arranged along a plane perpendicular to the axial direction. The larger the size of the first region 310, the more the influence of an external magnetic field can be reduced.

[0067] The second region 320 is located on a second side of the stator 200. The second region 320 may also be disposed along a plane perpendicular to the axial direction. The inner edge of the second region 320 has a curved surface.

[0068] The third region 330 connects the first region 310 and the second region 320. The third region 330 may include a plurality of bent regions, and at least three of the bent regions of the third region 330 may be bent in different directions.

[0069] For example, the third region 330 may include a first part 331 bent vertically downward from one side of the first region 310 and a second part 332 bent vertically from the first part 331. The third region 330 may include a third part 333 bent vertically downward from the second part 332, a fourth part 334 bent vertically from the third part 333 and disposed opposite the second part 332, and a fifth part 335 bent vertically downward from the fourth part 334 and connected to the second region 320.

[0070] The second part 332 forms a first surface S1 that contacts the housing 800. The fourth part 334 forms a second surface S2 that contacts the housing 800. When the third part 333 contacts the housing 800, it forms a third surface S3 that connects the first surface S1 and the second surface S2.

[0071] The first bent portion 340 is bent downward from the other side of the first region 310. The larger the size of the first bent portion 340, the more the influence of an external magnetic field can be reduced.

[0072] FIG. 7 is a perspective view showing the second shield 400. As shown in FIG.

[0073] Referring to FIG. 7, the second shield 400 includes a fourth region 410, a fifth region 420, and a sixth region 430. area 430 and the second bent portion 440. Although the fourth region 410, the fifth region 420, the sixth region 430, and the second bent portion 440 have been described as separate components, they may be connected to each other as a single member.

[0074] The fourth region 410 is located on a second side of the stator 200. The fourth region 410 may be arranged along a plane perpendicular to the axial direction. The larger the size of the fourth region 410, the more the influence of an external magnetic field can be reduced.

[0075] The fifth region 420 is located on the first side of the stator 200. The fifth region 420 may also be disposed along a plane perpendicular to the axial direction. The inner edge of the fifth region 420 has a curved surface.

[0076] The sixth region 430 connects the fourth region 410 and the fifth region 420. The sixth region 430 may include a plurality of bent regions. At least three of the bent regions of the sixth region 430 may be bent in different directions.

[0077] For example, the sixth region 430 is perpendicular to the other side of the fourth region 410. On top The sixth region 430 may include a sixth part 431 bent to the side and a seventh part 432 bent perpendicularly from the sixth part 431. The sixth region 430 may include a seventh part 432 bent perpendicularly from the seventh part 432. On top The eighth part 433 is bent to the side, the ninth part 434 is bent perpendicularly from the eighth part 433 and arranged opposite to the seventh part 432, and the ninth part 434 is bent perpendicularly from the ninth part 434. On topand a tenth part 435 that is bent in the direction and connected to the fifth region 420.

[0078] The seventh part 432 forms a fourth surface S4 that contacts the housing 800. The ninth part 434 forms a fifth surface S5 that contacts the housing 800. When the eighth part 433 contacts the housing 800, it forms a sixth surface S6 that connects the fourth surface S4 and the fifth surface S5.

[0079] The second bent portion 440 is bent upward from one side of the fourth region 410. The larger the size of the second bent portion 440, the more the influence of an external magnetic field can be reduced.

[0080] FIG. 8 is a perspective view showing the first collector 500. As shown in FIG.

[0081] 8, the first collector 500 may include the first body 510, first legs 520, and a first extension 530. The first legs 520 are bent downward from both sides of the first body 510 toward the Hall sensor 700. The first extension 530 extends inside the first body 510. The first extension 530 is arranged to overlap with the stator 200 in the axial direction. An inner edge of the first extension 530 is formed with a curved surface.

[0082] FIG. 9 is a perspective view showing the second collector 600. As shown in FIG.

[0083] 9, the second collector 600 includes a second body 610, a second leg 620, and a second extension 630. The second leg 620 extends from both sides of the second body 610 toward the Hall sensor 700. On top The second extension 630 is bent in the axial direction. The second extension 630 extends inside the second body 610. The second extension 630 is arranged to overlap with the stator 200 in the axial direction. The inner edge of the second extension 630 is formed with a curved surface.

[0084] FIG. 10 is a side cross-sectional view of one side of the sensor device shown in FIG.

[0085] 6 and 10 , the first shield 300 is disposed outside the housing 800. The first shield 300 contacts the outer surface of the housing 800. A first surface S1 of the first shield 300 contacts an upper surface 810 of the housing 800. A second surface S2 of the first shield 300 contacts a lower surface 820 of the housing 800. A third surface S3 of the first shield 300 contacts a side surface 830 of the housing 800.

[0086] 11 is a cross-sectional side view of the other side of the sensor device shown in FIG.

[0087] 7 and 11, the second shield 400 is disposed outside the housing 800. The second shield 400 contacts the outer surface of the housing 800. A fourth surface S4 of the second shield 400 contacts the upper surface 810 of the housing 800. A fifth surface S5 of the second shield 400 contacts the lower surface 820 of the housing 800. A sixth surface S6 of the second shield 400 contacts the side surface 830 of the housing 800.

[0088] In this way, the first shield 300 and the second shield 400 come into contact with the three surfaces of the housing 800, respectively, so that the first shield 300 and the second shield 400 can be stably fixed to the housing 800.

[0089] FIG. 12 is a diagram showing the flow of a magnetic field when there is no external magnetic field.

[0090] Referring to FIG. 12, in the absence of an external magnetic field, the rotor 100 and the stator 200 Between The magnetic field flows between the first collector 500 and the second collector 600 as shown by K1 in FIG. Departing from The first collector 500 and the second collector 600 transmit the flow of the magnetic field generated between the rotor 100 and the stator 200 to the Hall sensor 700.

[0091] FIG. 13 is a diagram showing the flow of a magnetic field when an external magnetic field is present in the axial direction.

[0092] 6 and 13, when there is an external magnetic field in the axial direction, as shown in K2 of FIG. 13, the external magnetic field directed toward the first collector 500 and the second collector 600 at a position away from the stator 200 flows into the first region 310 of the first shield 300, and is guided to the second region 320 and exits to the outside without flowing into the first collector 500 or the second collector 600.

[0093] When viewed in the axial direction, the first region 310 of the first shield 300 covers the first collector 500, the sensor 700, and the second collector 600. Specifically, the first region 310 covers the first body 510 of the first collector 500 and the second collector 600. No. 1 The first shield 300 is disposed so as to overlap with the leg 520 in the axial direction, and is spaced apart from the first collector 500. This makes it possible to prevent an external magnetic field from flowing toward the first collector 500.

[0094] Furthermore, when there is an external magnetic field in the axial direction, as shown in K3 of Figure 13, 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 to the outside without flowing into the first collector 500 or the second collector 600.

[0095] The second region 320 is arranged to overlap the second extension portion 630 of the second collector 600 in the axial direction, and the second region 320 is spaced apart from the second collector 600, and the fourth region 410 is arranged to overlap the second body 610 and the second leg 620 in the axial direction, and the fourth region 410 is spaced apart from the second collector 600, as shown in FIG. As shown in Even when an internal magnetic field is generated, the external magnetic field can be prevented from flowing into the first collector 500 or the second collector 600 as described above.

[0096] When viewed from the axial direction, the fifth region 420 completely covers the first collector 500, and the first shield 300 is spaced apart from the first collector 500, thereby preventing the external magnetic field toward the stator 200 from flowing into the first collector 500.

[0097] In this case, the size of the fifth region 420 is formed larger than the size of the first extension portion 530 so as to completely cover the first extension portion 530 of the first collector 500 when viewed in the axial direction. The shape of the fifth region 420 may be formed to correspond to the shape of the first extension portion 530. Therefore, the first shield 300 is disposed so that the first extension portion 530 is completely covered by the first region 310 when viewed in the axial direction.

[0098] FIG. 14 is a diagram showing the flow of a magnetic field when an external magnetic field is present in the radial direction.

[0099] Referring to FIG. 14, when there is an external magnetic field in the radial direction, as shown at K4 in FIG. 14, 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 without flowing into the first collector 500 or the second collector 600.

[0100] In addition, another external magnetic field directed toward the first collector 500 and the second collector 600 also flows into the second shield 400, and is guided by the second bent portion 440 to escape to the outside without flowing into the first collector 500 or the second collector 600.

[0101] Table 1 below compares the offset of the sensing value due to an external magnetic field in the sensor device according to the comparative example with the sensing value due to an external magnetic field in the sensor device according to the example.

[0102] Here, the comparative example is a sensor device including collectors arranged separately on the first and second sides of the stator without a separate shield. As shown in Table 1, in the case of an external magnetic field acting in a direction perpendicular to the axial direction (first direction x, second direction y), it can be confirmed that the offset of the sensing value of the comparative example is almost the same as that of the embodiment. However, in the case of an external magnetic field acting in the axial direction, Sensing value The offset is very low, at 1 / 40 of the offset of the sensing value according to the comparative example, and it can be seen that the influence of the external magnetic field acting in the axial direction is relatively small in the embodiment compared to the comparative example.

[0103] [Table 1]

[0104] FIG. 15 is a diagram showing another embodiment of the present invention. Sensor device FIG. 1 is a perspective view showing a shield 1300 according to a first embodiment of the present invention.

[0105] Referring to FIG. 15, another embodiment of the present invention is Sensor device The first shield 1300 includes a first region 1310, a second region 1320, a third region 1330, and a first bent portion 1340. Although the first region 1310, the second region 1320, the third region 1330, and the first bent portion 1340 have been described as being separate, they may be connected to each other as a single member.

[0106] The first region 1310 is located on a first side of the stator 200. The first region 1310 may be arranged along a plane perpendicular to the axial direction. The larger the size of the first region 1310, the more the influence of an external magnetic field can be reduced.

[0107] The second region 1320 is located on a second side of the stator 200. The second region 1320 may also be disposed along a plane perpendicular to the axial direction. The inner edge of the second region 1320 has a curved surface.

[0108] The third region 1330 connects the first region 1310 and the second region 1320. The third region 1330 may include a plurality of bent regions, and at least three of the bent regions of the third region 1330 may be bent in different directions.

[0109] For example, the third region 1330 may include a first part 1331 bent vertically downward from one side of the first region 1310 and a second part 1332 bent vertically from the first part 1331. The third region 1330 may include a third part 1333 bent vertically downward from the second part 1332, a fourth part 1334 bent vertically from the third part 1333 to face the second part 1332, and a fifth part 1335 bent vertically downward from the fourth part 1334 to be connected to the second region 1320.

[0110] The second part 1332 forms a first surface S11 that contacts the housing 800. The fourth part 1334 forms a second surface S12 that contacts the housing 800. When the third part 1333 contacts the housing 800, it forms a third surface S13 that connects the first surface S11 and the second surface S12.

[0111] The first bent portion 1340 is bent downward from the other side of the first region 1310. The larger the size of the first bent portion 1340, the more the influence of an external magnetic field can be reduced.

[0112] 16 is a plan view of the first shield 1300 shown in FIG. 15, and FIG. 17 is a side view of the first shield 1300 shown in FIG.

[0113] 15 to 17, the first region 1310 of the first shield 1300 may include a first groove 1311. The first region 1310 includes a first edge 1310a and a second edge 1310b that face each other. The first edge 1310a is disposed farther from the stator 200 in the radial direction than the second edge 1310b. The first groove 1311 may be formed in a concave shape from the first edge 1310a toward the second edge 1310b.

[0114] The first groove portions 1311 can be arranged so as not to overlap with the second regions 1320 in the axial direction.

[0115] The width L1 of the first groove portion 1311 in the direction perpendicular to the axial direction may be smaller than the width L2 from the second edge 1310b of the first region 1310 to the first groove portion 1311. The width L1 of the first groove portion 1311 in the direction perpendicular to the axial direction may be the same as the width L3 of the first bent portion 1340.

[0116] On the other hand, the second region 1320 may be formed flat without any steps along a plane perpendicular to the axial direction.

[0117] FIG. 18 is a perspective view showing the second shield 1400. As shown in FIG.

[0118] Figure 18 1, the second shield 1400 has a fourth region 1410, a fifth region 1420, and a sixth region 1430 and , and the second bent portion 1440. Although the fourth region 1410, the fifth region 1420, the sixth region 1430, and the second bent portion 1440 have been described as separate parts, they may be connected to each other as a single member.

[0119] The fourth region 1410 is located on a second side of the stator 200. The fourth region 1410 may be arranged along a plane perpendicular to the axial direction. The larger the size of the fourth region 1410, the more the influence of an external magnetic field can be reduced.

[0120] The fifth region 1420 is located on the first side of the stator 200. The fifth region 1420 may also be disposed along a plane perpendicular to the axial direction. The inner edge of the fifth region 1420 has a curved surface.

[0121] The sixth region 430 connects the fourth region 1410 and the fifth region 1420. The sixth region 430 may include a plurality of bent regions, and at least three of the bent regions of the sixth region 1430 may be bent in different directions.

[0122] For example, the sixth region 1430 may include a sixth part 1431 bent vertically downward from the other side of the fourth region 1410 and a seventh part 1432 bent vertically from the sixth part 1431. The sixth region 1430 may include an eighth part 1433 bent vertically downward from the seventh part 1432, a ninth part 1434 bent vertically from the eighth part 1433 and disposed opposite the seventh part 1432, and a tenth part 1435 bent vertically downward from the ninth part 1434 and connected to the fifth region 1420.

[0123] The seventh part 1432 forms a fourth surface S14 that contacts the housing 800. The ninth part 1434 forms a fifth surface S15 that contacts the housing 800. When the eighth part 1433 contacts the housing 800, it forms a sixth surface S16 that connects the fourth surface S14 and the fifth surface S15.

[0124] The second bent portion 1440 is bent upward from one side of the fourth region 1410. The larger the size of the second bent portion 1440, the more the influence of an external magnetic field can be reduced.

[0125] 19 is a plan view of the second shield 1400 shown in FIG. 18, and FIG. 20 is a side view of the second shield 1400 shown in FIG.

[0126] 18 to 20, the fourth region 1410 of the second shield 1400 may include a second groove portion 1411. The fourth region 1410 includes a third edge 1410a and a fourth edge 1410b that face each other. The third edge 1410a is disposed farther from the stator 200 than the fourth edge 1410b in the radial direction. The second groove portion 1411 may be formed in a concave shape extending from the third edge 1410a toward the fourth edge 1410b.

[0127] The second groove portion 1411 can be arranged so as not to overlap with the fifth region 1420 in the axial direction.

[0128] The width L4 of the second groove portion 1411 in the direction perpendicular to the axial direction may be smaller than the width L5 from the fourth edge 1410b of the fourth region 1410 to the second groove portion 1411. The width L4 of the second groove portion 1411 in the direction perpendicular to the axial direction may be the same as the width L6 of the second bent portion 1440.

[0129] On the other hand, the fourth region 1420 may be formed flat without any steps along a plane perpendicular to the axial direction.

[0130] Figure 21 is ,shaft 15 and the second shield 1400 of FIG. 18 when an external magnetic field is present in the direction of the arrows.

[0131] 15 to 21, when there is an external magnetic field in the axial direction, as shown in K6 in FIG. 21, the external magnetic field directed from a position away from the stator 200 toward the first collector 500 and the second collector 600 flows into the first region 1310 of the first shield 1300, and is guided to the second region 1320 and escapes to the outside without flowing into the first collector 500 or the second collector 600.

[0132] When viewed from the axial direction, the first region 1310 of the first shield 1300 covers the first collector 500, the sensor 700, and the second collector 600. The first shield 1300 is spaced apart from the first collector 500. This prevents an external magnetic field from flowing toward the first collector 500.

[0133] Also, when there is an external magnetic field in the axial direction, as shown in K7 of Figure 21, the external magnetic field toward the stator 200 flows into the fifth region 1420 of the second shield 1400, and is guided to the fourth region 410 and escapes to the outside without flowing into the first collector 500 or the second collector 600.

[0134] Figure 22 is a perspective view showing the housing 800, Figure 23 is a perspective view of the first housing 800 shown in Figure 22, the first housing 800A, as seen from the front, and Figure 24 is a perspective view of the first housing 800A shown in Figure 22, as seen from the rear.

[0135] 1 and 22, the housing 800 can be divided into a first housing 800A and a second housing 800B that are axially coupled to each other. The first shield 300 is assembled to the first housing 800A, and the second shield 400 is assembled to the second housing 800B.

[0136] A cover 810 may be disposed on each of the first housing 800A and the second housing 800B. The cover 810 may be disposed so as to protrude in the axial direction from the first housing 800A. The cover 810 may be disposed so as to protrude in the axial direction from the second housing 800B.

[0137] Since the cover 810 of the first housing 800A and the cover 810 of the second housing 800B have the same shape and function, the following description will be based on the cover 810 of the first housing 800A.

[0138] As shown in FIGS. 23 and 24, the cover 810 may include a body 811 and a sidewall 812 .

[0139] The body 811 is disposed along a direction perpendicular to the axial direction. The body 811 may have a plate shape. For example, the body 811 may have a square plate shape.

[0140] The side walls 812 may be arranged on both side surfaces of the body 811. The side walls 812 may extend along the axial direction on both side surfaces of the body 811. The two side walls 812 may be arranged opposite each other. The body 811 is located at the axial end of the side walls 812.

[0141] The cover 810 includes an opening O1 on one side and an opening O2 on the other side. The side walls 812, the body 811, and the outer surface of the housing 800 form the opening O1 on one side and the opening O2 on the other side. The cover 810 forms a space inside in which the first shield 300 or the second shield 400 is positioned.

[0142] Figure 25 shows the Sensor FIG.

[0143] 25, the cover 810 is disposed on the outer side of the first shield 300. The cover 810 is disposed on the outer side of the second shield 400. The cover 810 is disposed so as to overlap the first shield 300 in the axial direction. The cover 810 is disposed so as to overlap the second shield 400 in the axial direction.

[0144] Specifically, the body 811 of the cover 810 can be arranged to overlap the first region 310 of the first shield 300 in the axial direction. Also, the body 811 of the cover 810 can be arranged to overlap the fourth region 410 of the second shield 400 in the axial direction.

[0145] The body 811 is spaced apart from the outer surface of the housing 800 in the axial direction. The first region 310 is spaced apart from the outer surface of the housing 800 and is located between the body 811 and the outer surface of the housing 800. The fourth region 410 is spaced apart from the outer surface of the housing 800 and is located between the body 811 and the outer surface of the housing 800.

[0146] The side wall 812 of the cover 810 may be disposed to overlap the first bent portion 340 of the first shield 300 in a direction perpendicular to the axial direction. Also, the side wall 812 of the cover 810 may be disposed to overlap the second bent portion 440 of the second shield 400 in a direction perpendicular to the axial direction.

[0147] Figure 26 shows the Sensor FIG.

[0148] 26, when viewed in the axial direction, the first shield 300 is completely covered by the body 811 of the cover 810. The cover 810 is arranged so as not to overlap with the stator 200, and the fifth region 420 of the second shield 400 is exposed and not covered by the cover 810. The size of the body 811 may be larger than the size of the first region 310 of the first shield 300 so that the body 811 can completely cover the first region 310 in the axial direction.

[0149] Although not shown, the second shield 400 has the same configuration as the first shield 300 described above, and is completely covered by the body 811 of the cover 810 .

[0150] Figure 27 shows the Sensor FIG.

[0151] 27, when viewed in a direction perpendicular to the axial direction, the first bent portion 340 of the first shield 300 is completely covered by the side wall 812 of the cover 810. The size of the side wall 812 may be larger than the size of the first bent portion 340 so that the side wall 812 can completely cover the first bent portion 340 of the first shield 300 in the direction perpendicular to the axial direction.

[0152] Although not shown, the second bent portion 440 of the second shield 400 has the same configuration as the first shield 300 described above, and is completely covered by the side wall 812 of the cover 810.

[0153] Structurally, because cover 810 surrounds the outside of first shield 300 or the outside of second shield 400, damage to first shield 300 or second shield 400 due to external impact can be prevented. Furthermore, because cover 810 protecting first shield 300 or second shield 400 is provided on housing 800, there is no need to provide a separate structure to protect first shield 300 or second shield 400, resulting in a simple configuration. Furthermore, because cover 810 is disposed to overlap first shield 300 or second shield 400 not only in the axial direction but also in a direction perpendicular to the axial direction, it can effectively protect first shield 300 or second shield 400 against external impact.

[0154] As shown in Figures 23 to 25, the first shield 300 and the second shield 400 are assembled through one side opening O1 and the other side opening O2 provided in the cover 810, respectively, so that the first shield 300 and the second shield 400 can be easily assembled to the housing 800 while protecting the first shield 300 and the second shield 400.

[0155] FIG. 28 is an enlarged view showing the inside of the cover 810 of the housing 800.

[0156] 28 , the housing 800 may include a protrusion 801. The protrusion 801 protrudes in the axial direction from the outer surface of the housing 800. The protrusion 801 is disposed opposite a side wall 812 of the cover 810. The first bent portion 340 of the first shield 300 and the second bent portion 440 of the second shield 400 may be located between the side wall 812 and the protrusion 801, respectively.

[0157] The first shield 300 and the second shield 400 may be inserted into the cover 810 in a direction perpendicular to the axial direction, respectively, to be assembled to the housing 800. In this case, during the assembly process of the first shield 300 and the second shield 400, The side wall 812 and the protrusion 801 are The guide 340 guides the position of the first bent portion 340 or the second bent portion 440, and serves to align the first shield 300 or the second shield 400 so that they can be assembled in a fixed position.

[0158] The above-described embodiment can be used in various devices such as vehicles and home appliances.

Claims

1. The rotor and a stator disposed 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; the first shield is disposed spaced apart from the first collector and the second collector; The second shield is disposed at a distance from the first collector and the second collector.

2. 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, 2. The sensor device of claim 1, wherein the second shield includes a fourth region located on the second side of the stator in the axial direction, a fifth region located on the first side of the stator, and a sixth region connecting the fourth region and the fifth region.

3. the second region is arranged to overlap with the stator in the axial direction, The sensor device according to claim 2 , wherein the fourth region is disposed so as to overlap the stator in the axial direction.

4. the first shield includes a first bent portion bent from an end of the first region toward the second shield, The sensor device according to claim 2 , wherein the second shield includes a second bent portion bent from an end of the second region toward the first shield.

5. the first collector includes a first body, a first leg bent from the first body toward the Hall sensor, and a first extension extending from the first body to overlap the stator in the axial direction, 2. The sensor device of claim 1, wherein the shape of the fifth region that axially overlaps with the stator is arranged to correspond to the shape of the first extension portion, and the size of the fifth region is larger than the size of the first extension portion so as to completely cover the first extension portion in the axial direction.

6. The rotor and a stator disposed 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; a housing disposed outside the stator, the first shield and the second shield are each disposed outside the housing; a first collector and a second collector are each disposed inside the housing; the housing includes a cover disposed outside the first shield and the second shield, A sensor device, wherein the body of the cover is arranged to overlap the first shield in the axial direction and is arranged to overlap the second shield in the axial direction.

7. the cover includes a side wall connecting the body and the housing; The sensor device according to claim 6 , wherein the side wall is disposed so that the body overlaps with the first shield in a direction perpendicular to the axial direction and so that the body overlaps with the second shield in a direction perpendicular to the axial direction.

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

9. The sensor device according to claim 3 , wherein the body is disposed so as to overlap the first region in the axial direction and so as to overlap the fourth region in the axial direction.

10. the first shield includes a first bent portion bent from an end of the first region toward the second shield, the second shield includes a second bent portion bent from an end of the second region toward the first shield, The sensor device according to claim 3 , wherein the body is disposed to overlap the first bent portion in a direction perpendicular to the axial direction and the second bent portion in a direction perpendicular to the axial direction.

Images