Sensor device
By setting the guard and the collector in the sensor device and placing the Hall sensor between them, the problem of external magnetic field affecting the measurement accuracy is solved, and an accurate measurement of the torsion degree of the torsion bar is achieved.
Patent Information
- Application Number
- CN202380063899.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-12-06
- Filing Date
- 2023-08-07
- Publication Date
- 2025-04-15
AI Technical Summary
When measuring the torsion degree of the torsion rod, the sensor device is susceptible to external magnetic field, resulting in changes in the output value and cannot be accurately measured.
A sensor device is designed, using a first guard and a second guard to be arranged on both sides of the stator, a first collector and a second collector are arranged between the guards, and a Hall sensor is arranged between the collectors, and the guard to guide an external magnetic field away from the collector to prevent it from affecting the Hall sensor.
It effectively prevents the influence of external magnetic fields on the sensor and ensures that the sensor device can accurately measure the torsion degree of the torsion rod.
Smart Images
Figure CN119836561A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a sensor device. Background Art
[0002] In an electronic powertrain system (EPS), an electronic control unit drives a motor according to operating conditions to ensure steering stability and quickly provide restoring force so that the driver can drive safely.
[0003] EPS includes a sensor device that measures the torque and steering angle of the steering shaft to provide appropriate torque. The sensor device measures the degree of twisting of the torsion bar. The torsion bar is a member that connects the steering shaft to the input shaft connected to the handle and the output shaft of the handle connected to the power transmission component, and connects the input shaft to the output shaft.
[0004] The sensor device includes a housing, a rotor, a stator including stator teeth, and a collector. In this case, the collector is disposed outside the stator teeth. Therefore, when an external magnetic field is generated, the collector serves as a path of the external magnetic field and thus there is a problem of affecting the magnetic flux value of the sensor. When the sensor is affected as described above, the output value of the sensor device changes, and thus there is a problem of not being able to accurately measure the degree of torsion of the torsion bar. Summary of the invention
[0005] Technical issues
[0006] The present invention aims to provide a sensor device capable of preventing the sensor from being affected by external magnetism.
[0007] Technical Solution
[0008] One aspect of the present invention provides a sensor device, which includes: a rotor; a stator, which is arranged to correspond to the rotor; a first guard and a second guard, which are respectively arranged on one side of the stator; a first collector and a second collector, which are arranged between the first guard and the second guard; and a Hall sensor, which is arranged between the first collector and the second collector, wherein the first guard is arranged to be spaced apart from the first collector and the second collector, and the second guard is arranged to be spaced apart from the first collector and the second collector.
[0009] The first guard may include a first region located on the first side of the stator in the axial direction, a second region arranged on the second side of the stator, and a third region connecting the first region and the second region, and the second guard 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.
[0010] The second region may be disposed so as to overlap with the stator in the axial direction, and the fourth region may be disposed so as to overlap with the stator in the axial direction.
[0011] The first prevention member may include a first bent portion bent from an end portion of the first region toward the second prevention member, and the second prevention member may include a second bent portion bent from an end portion of the second region toward the first prevention member.
[0012] The first collector may include: a first body; a first leg, the first leg being bent from the first body toward the Hall sensor; and a first extension portion, the first extension portion being arranged on the first body to overlap with the stator in an axial direction, wherein a shape of the first extension portion overlapping with the stator in the axial direction may be arranged to correspond to a shape of a fifth region, and a size of the fifth region may be larger than a size of the first extension portion so as to cover the first extension portion in the axial direction.
[0013] The first region may be disposed to overlap with the first body and the first leg in the axial direction.
[0014] The second collector may include: a second body; a second leg, the second leg being bent from the second body toward the Hall sensor; a second extension portion, the second extension portion being arranged on the second body to overlap with the stator in the axial direction, the shape of the fourth region may be 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.
[0015] The fourth region may be disposed to overlap with the first body and the first leg in the axial direction.
[0016] Each of the third region and the sixth region may include a plurality of bending regions, and bending directions of at least three of the plurality of bending regions may be different from each other.
[0017] The sensor device may further include a shell arranged on the outside of the stator, the third region may include a first surface in contact with the upper surface of the shell, a second surface in contact with the lower surface of the shell, and a third surface connecting the first surface and the second surface and in contact with the side surface of the shell, and the sixth region may include a fourth surface in contact with the upper surface of the shell, a fifth surface in contact with the lower surface of the shell, and a sixth surface connecting the third surface and the fourth surface and in contact with the side surface of the shell.
[0018] Beneficial Effects
[0019] In an embodiment, a shield spaced apart from the collector prevents an external magnetic field from flowing toward the collector, allows the external magnetic field to flow to the outside, and prevents the sensor from being affected by the external magnetic field. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 is a perspective view illustrating a sensor device according to an embodiment;
[0021] Figure 2 It's a picture. Figure 1 A perspective view of an internal portion of the sensor device shown in FIG.
[0022] Figure 3 It's a picture. Figure 1 A perspective view of the first and second protective members of the sensor device shown in FIG.
[0023] Figure 4 is a view illustrating a state before the first guard, the second guard, the first collector, and the second collector are assembled;
[0024] Figure 5 is a side view illustrating a state in which the first guard, the second guard, the first collector, and the second collector are assembled;
[0025] Figure 6 is a perspective view illustrating a first protective member;
[0026] Figure 7 is a perspective view illustrating a second protective member;
[0027] Figure 8 is a perspective view illustrating a first collector;
[0028] Fig. 9 is a perspective view illustrating a second collector;
[0029] Fig.10 It's a picture. Figure 1 A side cross-sectional view of one side of the sensor device illustrated in FIG.
[0030] Fig.11 It's a picture. Figure 1 A side cross-sectional view of another side of the sensor device illustrated in FIG.
[0031] Fig.12 is a diagram illustrating magnetic field flow when no external magnetic field is present;
[0032] Fig.13 is a view illustrating a magnetic field flow when there is an external magnetic field in an axial direction;
[0033] Fig.14 is a view illustrating a magnetic field flow when there is an external magnetic field in a radial direction;
[0034] Fig.15 is a perspective view illustrating a first guard member of a motor according to another embodiment of the present invention;
[0035] Fig.16 It's a picture. Fig.15 A plan view of the first guard member shown in FIG.
[0036] Fig.17 It's a picture. Fig.15 A side view of the first guard member shown in FIG.
[0037] Fig.18 is a perspective view illustrating a second protective member;
[0038] Fig.19 It's a picture. Fig.18 A plan view of the second protective member shown in FIG.
[0039] Fig. 20 It's a picture. Fig.18 A side view of the second guard member shown in FIG.
[0040] Fig.21 It is a diagram showing that when there is an external magnetic field in the lateral direction, Fig.15 The first protection member and Fig.18 a view of a magnetic field flow of a second shield;
[0041] Fig. 22 is a perspective view illustrating a housing;
[0042] Fig.23 It's a picture. Fig. 22 A front perspective view of the first housing as shown in FIG.
[0043] Fig.24 It's a picture. Fig. 22 A rear perspective view of the first housing shown in FIG.
[0044] Fig.25 It's a picture. Figure 1 A front view of the sensing device shown in FIG.
[0045] Fig.26 It's a picture. Figure 1 A plan view of the sensing device shown in FIG.
[0046] Fig. 27 It's a picture. Figure 1 A side view of the sensing device shown in FIG.
[0047] Fig.28 is an enlarged view illustrating an inner portion of a cover of a housing. DETAILED DESCRIPTION
[0048] Hereinafter, a direction perpendicular to the axial direction of the sensor device is a radial direction, and a direction along a circle having a certain radius in the radial direction from the axial center is referred to as a circumferential direction.
[0049] Figure 1 is a perspective view illustrating a sensor device according to an embodiment, Figure 2 It's a picture. Figure 1 A perspective view of an internal portion of the sensor device shown in FIG. Figure 3 It's a picture. Figure 1 A perspective view of the first and second protective members of the sensor device shown in FIG.
[0050] Reference Figures 1 to 3 , the sensor device according to the embodiment may include a rotor 100, a stator 200, a first guard 300, a second guard 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 axial direction and perpendicular to the direction indicated by the x-axis, and the z-axis indicates the axial direction.
[0051] In this case, 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 in the stator 200, may be connected to an input shaft (not shown), but the present invention is not limited thereto. In this case, the rotor 100 may be disposed to be rotatable relative to the stator 200. Hereinafter, the term "inward" refers to a direction toward the center in a radial direction, and the term "outward" refers to a direction opposite to "inward".
[0052] In the sensor device according to the embodiment, the first protection member 300 and the second protection member 400 prevent the Hall sensor 700 from being affected by the external magnetic field by guiding the external magnetic field away without flowing toward the first collector 500 or the second collector 600 in an environment where the external magnetic field acts.
[0053] 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.
[0054] A housing 10 is provided at an outer side of the stator 200. The housing 80 may include an upper housing 11 and a lower housing 12. The stator 200, the first protection member 300, the second protection member 400, the first collector 500, and the second collector 600 may be fixed to the housing 80.
[0055] The first guard 300 may be disposed to span from a first side of the stator 200 in the axial direction toward the second side. The second guard 400 may be disposed to span from the second side of the stator 200 in the axial direction toward the first side. 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.
[0056] The first collector 500 and the second collector 600 are disposed to correspond to the Hall sensor 700 .
[0057] A substrate S may be disposed between the first collector 500 and the second collector 600 .
[0058] 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 and detects a change in a magnetic field occurring between the stator 200 and the rotor 100. The Hall sensor 700 may be a Hall integrated circuit (IC). The sensor device measures torque based on the detected change in the magnetic field.
[0059] Only the positions of the first and second protection members 300 and 400 are different, and the shapes and sizes of the first and second protection members 300 and 400 may be the same. Only the positions of the first and second collectors 500 and 600 are different, and the shapes and sizes of the first and second collectors 500 and 600 may be the same.
[0060] Based on the axial direction, each of the first collector 500 and the second collector 600 is located between the first shield 300 and the second shield 400. Therefore, the first collector 500 and the second collector 600 may be protected from the external magnetic field by the first shield 300 and the second shield 400.
[0061] Figure 4 3 is a view illustrating a state before the first prevention member 300 , the second prevention member 400 , the first collector 500 , and the second collector 600 are assembled.
[0062] Reference Figure 1 and Figure 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 protection member 300 and the second protection member 400 may be assembled to the outside of the stator 200 in the radial direction. First, after the first collector 500 and the second collector 600 are assembled in the housing 800, the first protection member 300 and the second protection member 400 may enter the housing 800 in the radial direction and may be assembled in the housing 800.
[0063] Figure 5 1 is a side view illustrating a state in which the first prevention member 300 , the second prevention member 400 , the first collector 500 , and the second collector 600 are assembled.
[0064] Reference Figure 5, the first protection member 300 is disposed to be spaced apart from the first collector 500 and the second collector 600. The second protection member 400 is also disposed to be spaced apart from the first collector 500 and the second collector 600. This is to prevent the external magnetic field from flowing to the first collector 500 and the second collector 600 through the first protection member 300 or the second protection member 400.
[0065] The inner end portion of the first guard 300 is arranged to overlap with the stator 200 in the axial direction to form an overlapping region. The inner end portion of the second guard 400 is also arranged to overlap with the stator 200 in the axial direction.
[0066] The first collector 500 and the second collector 600 are disposed between the first prevention member 300 and the second prevention member 400 based on the axial direction.
[0067] Figure 6 2 is a perspective view illustrating the first protection member 300 .
[0068] Reference Figure 6 , the first protection member 300 includes a first region 310, a second region 320, a third region 330, and a first bending portion 340. The first region 310, the second region 320, the third region 330, and the first bending portion 340 are described as separate but may be one connected member.
[0069] 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.
[0070] The second region 320 is located at a second side of the stator 200. The second region 320 may be disposed along a plane perpendicular to the axial direction. An inner edge of the second region 320 has a curved surface.
[0071] The third region 330 connects the first region 310 and the second region 320. The third region 330 may include a plurality of bending regions. The bending directions of at least three of the plurality of bending regions of the third region 330 may be different from each other.
[0072] 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 disposed to be bent vertically from the third portion 333 and facing the second portion 332, and a fifth portion 335 bent vertically from the fourth portion 334 and connected to the second region 320.
[0073] The second portion 332 forms a first 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 in contact with the housing 800 and connected to the first surface S1 and the second surface S2.
[0074] 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.
[0075] Figure 7 2 is a perspective view illustrating the second protection member 400 .
[0076] Reference Figure 7 , the second protection member 400 includes a fourth region 410, a fifth region 420, a sixth region 430 and a second bending portion 440. The fourth region 410, the fifth region 420, the sixth region 430 and the second bending portion 440 are described as being independent but may be a connected member.
[0077] 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.
[0078] The fifth region 420 is located at the first side of the stator 200. The fifth region 420 may also be disposed along a plane perpendicular to the axial direction. An inner edge of the fifth region 420 has a curved surface.
[0079] The sixth region 430 connects the fourth region 410 and the fifth region 420. The sixth region 430 may include a plurality of bending regions. The bending directions of at least three of the plurality of bending regions of the sixth region 430 may be different from each other.
[0080] 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 disposed to be bent vertically from the eighth portion 433 and facing the seventh portion 432, and a tenth portion 435 bent vertically downward from the ninth portion 434 and connected to the fifth region 420.
[0081] 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 in contact with the housing 800 and connected to the fourth surface S4 and the fifth surface S5.
[0082] 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.
[0083] Figure 8 is a perspective view illustrating the first collector 500 .
[0084] 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 to be bent downward from both sides of the first body 510 to face the Hall sensor 700. The first extension 530 extends to the inner side of the first body 510. The first extension 530 is disposed to overlap with the stator 200 in the axial direction. The inner edge of the first extension 530 is formed as a curved surface.
[0085] Fig. 9 is a perspective view illustrating the second collector 600 .
[0086] Reference Fig. 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 configured to be bent downward from both sides of the second body 610 to face the Hall sensor 700. The second extension 630 extends to the inner side of the second body 610. The second extension 630 is configured to overlap with the stator 200 in the axial direction. The inner edge of the second extension 630 is formed as a curved surface.
[0087] Fig.10 yes Figure 1 A side cross-sectional view of one side of the sensor device shown in FIG.
[0088] Reference Figure 6 and Fig.10 , the first protective member 300 is disposed outside the housing 800. In addition, the first protective member 300 contacts the outer surface of the housing 800. The first surface S1 of the first protective member 300 contacts the upper surface 810 of the housing 800. The second surface S2 of the first protective member 300 contacts the lower surface 820 of the housing 800. In addition, the third surface S3 of the first protective member 300 contacts the side surface 830 of the housing 800.
[0089] Fig.11 yes Figure 1 0026] A side cross-sectional view of another side of the sensor device shown in FIG.
[0090] Reference Figure 7 and Fig.11, the second protective member 400 is disposed outside the housing 800. In addition, the second protective member 400 contacts the outer surface of the housing 800. The fourth surface S4 of the second protective member 400 contacts the upper surface 810 of the housing 800. The fifth surface S5 of the second protective member 400 contacts the lower surface 820 of the housing 800. In addition, the sixth surface S6 of the second protective member 400 contacts the side surface 830 of the housing 800.
[0091] As described above, since the first and second prevention members 300 and 400 are in contact with three surfaces of the housing 800 , the first and second prevention members 300 and 400 may be stably fixed to the housing 800 .
[0092] Fig.12 is a diagram illustrating the flow of a magnetic field when there is no external magnetic field.
[0093] Reference Fig.12 When there is no external magnetic field, the magnetic field flow generated between the rotor 100 and the stator 200 is only generated between the first collector 500 and the second collector 600. Fig.12 The first collector 500 and the second collector 600 transmit the magnetic flow generated between the rotor 100 and the stator 200 to the Hall sensor 700 .
[0094] Fig.13 is a view illustrating a magnetic field flow when there is an external magnetic field in the axial direction.
[0095] Reference Figure 6 and Fig.13 , when there is an external magnetic field in the axial direction, such as Fig.13 At K2 shown in the figure, the external magnetic field facing the first collector 500 and the second collector 600 from a position outside the stator 200 is introduced into the first region 310 of the first protective member 300, guided to the second region 320 without flowing to the first collector 500 or the second collector 600, and leaves to the outside.
[0096] The first region 310 of the first protective member 300 covers the first collector 500, the sensor 700, and the second collector 600 in the axial direction. Specifically, the first region 310 is arranged to overlap the first body 510 and the second leg 520 of the collector 500 in the axial direction. In addition, the first protective member 300 is spaced apart from the first collector 500. Therefore, the external magnetic field can be blocked from flowing to the first collector 500.
[0097] In addition, when there is an external magnetic field in the axial direction, such as Fig.13At K3 shown in FIG. 2 , the external magnetic field facing the stator 200 is introduced into the fifth region 420 of the second guard 400 , guided to the fourth region 410 without flowing to the first collector 500 or the second collector 600 , and leaves to the outside.
[0098] 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 spaced apart 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 spaced apart from the second collector 600, even when Fig.13 When an external magnetic field is generated downward and upward in the collector, the external magnetic field can also be prevented from flowing toward the first collector 500 or the second collector 600.
[0099] Since the fifth region 420 completely covers the first collector 500 in the axial direction and the first guard 300 is spaced apart from the first collector 500 , the external magnetic field facing the stator 200 may be prevented from flowing toward the first collector 500 .
[0100] In this case, the fifth region 420 is formed to have a size greater than that of the first extension portion 530 to completely cover the first extension portion 530 of the first collector 500 in the axial direction. In addition, the shape of the fifth region 420 may be formed to correspond to the shape of the first extension portion 530. Therefore, the first guard 300 is provided so that the first extension portion 530 is completely covered by the first region 310 in the axial direction.
[0101] Fig.14 is a view illustrating a magnetic field flow when there is an external magnetic field in a radial direction.
[0102] Reference Fig.14 , when there is an external magnetic field in the radial direction, such as Fig.14 At K4 illustrated in , the external magnetic field facing the first collector 500 and the second collector 600 is introduced into the first region 340 of the first guard 300 and is guided away to the outside without flowing toward the first collector 500 or the second collector 600 .
[0103] In addition, another external magnetic field facing the first collector 500 and the second collector 600 is also introduced into the second shield 400 , guided to the second bent portion 440 without flowing toward the first collector 500 or the second collector 600 , and exits to the outside.
[0104] Table 1 below is a comparison between a shift of a sensing value according to an external magnetic field in a sensor device according to a comparative example and a shift of a sensing value according to an external magnetic field in a sensor device according to an example.
[0105] In this case, in the example, the sensor device includes a collector without a separate additional protective member, which is respectively arranged on the first side and the second side of the stator. As shown in Table 1, in the case where the external magnetic field acts in a direction perpendicular to the axial direction (the first direction x and the second direction y), it can be seen that the offset of the sensing value of the comparative example and the offset of the sensing value of the example are almost the same. However, in the case where the external magnetic field acts in the axial direction, the offset of the sensor device according to the example is at a very low level of 1 / 40 of the offset of the sensing value according to the comparative example, and therefore it can be seen that the influence of the external magnetic field acting in the axial direction according to the example is relatively smaller than the influence of the external magnetic field acting in the axial direction according to the comparative example.
[0106] [Table 1]
[0107]
[0108] Fig.15 is a perspective view illustrating a first guard 1300 of a motor according to another embodiment of the present invention.
[0109] Reference Fig.15 , a first guard 1300 of a motor according to another embodiment of the present invention includes a first region 1310, a second region 1320, a third region 1330, and a first bending portion 1340. The first region 1310, the second region 1320, the third region 1330, and the first bending portion 1340 are described as being separate but may be one connected member.
[0110] The first region 1310 is located at a first side of the stator 200. The first region 1310 may be disposed along a plane perpendicular to the axial direction. As the size of the first region 1310 increases, the influence of the external magnetic field may be reduced.
[0111] The second region 1320 is located at the second side of the stator 200. The second region 1320 may also be disposed along a plane perpendicular to the axial direction. An inner edge of the second region 1320 has a curved surface.
[0112] The third region 1330 connects the first region 1310 and the second region 1320. The third region 1330 may include a plurality of bending regions. The bending directions of at least three of the plurality of bending regions of the third region 1330 may be different from each other.
[0113] For example, the third region 1330 may include a first portion 1331 bent vertically downward from one side of the first region 1310 and a second portion 1332 bent vertically from the first portion 1331. In addition, the third region 1330 may include a third portion 1333 bent vertically downward from the second portion 1332, a fourth portion 1334 disposed to be bent vertically from the third portion 1333 and facing the second portion 1332, and a fifth portion 1335 bent vertically downward from the fourth portion 1334 and connected to the second region 1320.
[0114] The second portion 1332 forms a first surface S11 in contact with the housing 800. The fourth portion 1334 forms a second surface S12 in contact with the housing 800. In addition, the third portion 1333 forms a third surface S13 in contact with the housing 800 and connected to the first surface S11 and the second surface S12.
[0115] The first bent portion 1340 is bent downward from the other side of the first region 1310. As the size of the first bent portion 134 increases, the influence of the external magnetic field may be reduced.
[0116] Fig.16 It's a picture. Fig.15 A plan view of the first protective member 1300 is shown in FIG. Fig.17 It's a picture. Fig.15 00 is a side view of the first protective member 1300 shown in FIG.
[0117] Reference Figures 15 to 17 , the first region 1310 of the first guard 1300 may include a first groove 1311. The first region 1310 includes a first edge 1310a and a second edge 1310b facing 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 to be recessed from the first edge 1310a toward the second edge 1310b.
[0118] The first groove 1311 may be disposed so as not to overlap with the second region 1320 in the axial direction.
[0119] The width L1 of the first groove 1311 may be smaller than the width L2 from the second edge 1310b of the first region 1310 to the first groove 1311 in a direction perpendicular to the axial direction. In addition, the width L1 of the first groove 1311 may be the same as the width L3 of the first bent portion 1340 in a direction perpendicular to the axial direction.
[0120] Meanwhile, the second region 1320 may be formed to be flat along a plane perpendicular to the axial direction without a step.
[0121] Fig.1814 is a perspective view illustrating the second protection member 1400 .
[0122] Reference Figure 7 The second protection member 1400 includes a fourth region 1410, a fifth region 1420, a sixth region 1430, and a second bending portion 1440. The fourth region 1410, the fifth region 1420, the sixth region 1430, and the second bending portion 1440 are described as being separate but may be a connected member.
[0123] The fourth region 1410 is located at the second side of the stator 200. The fourth region 1410 may be disposed along a plane perpendicular to the axial direction. As the size of the fourth region 1410 increases, the influence of the external magnetic field may be reduced.
[0124] The fifth region 1420 is located at the first side of the stator 200. The fifth region 1420 may also be disposed along a plane perpendicular to the axial direction. An inner edge of the fifth region 1420 has a curved surface.
[0125] The sixth region 430 connects the fourth region 1410 and the fifth region 1420. The sixth region 430 may include a plurality of bending regions. The bending directions of at least three of the plurality of bending regions of the sixth region 1430 may be different from each other.
[0126] For example, the sixth region 1430 may include a sixth portion 1431 bent vertically downward from the other side of the fourth region 1410 and a seventh portion 1432 bent vertically from the sixth portion 1431. In addition, the sixth region 1430 may include an eighth portion 1433 bent vertically downward from the seventh portion 1432, a ninth portion 1434 disposed to be bent vertically from the eighth portion 1433 and facing the seventh portion 1432, and a tenth portion 1435 bent vertically downward from the ninth portion 1434 and connected to the fifth region 1420.
[0127] The seventh portion 1432 forms a fourth surface S14 in contact with the housing 800. The ninth portion 1434 forms a fifth surface S15 in contact with the housing 800. In addition, the eighth portion 1433 forms a sixth surface S16 in contact with the housing 800 and connected to the fourth surface S14 and the fifth surface S15.
[0128] The second bent portion 1440 is bent upward from one side of the fourth region 1410. As the size of the second bent portion 1440 increases, the influence of the external magnetic field may be reduced.
[0129] Fig.19 It's a picture. Fig.18 A plan view of the second protective member 1400 is shown in FIG. 1 , and Fig. 20 It's a picture. Fig.1800 is a side view of the second protective member 1400 shown in FIG.
[0130] Reference Figures 18 to 20 , the fourth region 1410 of the second guard 1400 may include a second groove 1411. The fourth region 1410 includes a third edge 1410a and a fourth edge 1410b facing each other. The third edge 1410a is disposed farther from the stator 200 in the radial direction than the fourth edge 1410b. The second groove 1411 may be formed to be recessed from the third edge 1410a toward the fourth edge 1410b.
[0131] The second groove 1411 may be disposed so as not to overlap with the fifth region 1420 in the axial direction.
[0132] The width L4 of the second groove 1411 may be smaller than the width L5 from the fourth edge 1410b of the fourth region 1410 to the second groove 1411 in a direction perpendicular to the axial direction. In addition, the width L4 of the second groove 1411 may be the same as the width L6 of the second bent portion 1440 in a direction perpendicular to the axial direction.
[0133] Meanwhile, the fourth region 1420 may be formed to be flat along a plane perpendicular to the axial direction without a step.
[0134] Fig.21 It is a diagram showing that when there is an external magnetic field in the lateral direction, Fig.15 The first protection member 1300 and Fig.18 FIG. 1 is a view of the magnetic field flow of the second shield 1400 .
[0135] Reference Figures 15 to 21 , when there is an external magnetic field in the axial direction, such as Fig.21 At K6 shown in the figure, the external magnetic field facing the first collector 500 and the second collector 600 from a position outside the stator 200 is introduced into the first region 1310 of the first protective member 1300, guided to the second region 1320 without flowing to the first collector 500 or the second collector 600, and leaves to the outside.
[0136] The first region 1310 of the first protection member 1300 covers the first collector 500, the sensor 700, and the second collector 600 in the axial direction. In addition, the first protection member 1300 is spaced apart from the first collector 500. Therefore, the external magnetic field can be prevented from flowing to the first collector 500.
[0137] In addition, when there is an external magnetic field in the axial direction, such as Fig.21At K7 shown in FIG. 1 , the external magnetic field facing the stator 200 is introduced into the fifth region 1420 of the second guard 1400 , guided to the fourth region 410 without flowing to the first collector 500 or the second collector 600 , and leaves to the outside.
[0138] Fig. 22 is a perspective view illustrating the housing 800, Fig.23 It's a picture. Fig. 22 A front perspective view of the first housing 800A shown in FIG. Fig.24 It's a picture. Fig. 22 800A is a rear perspective view of the first shell 800A shown in FIG.
[0139] Reference Figure 1 and Fig. 22 , the housing 800 may be divided into a first housing 800A and a second housing 800B coupled to each other in the axial direction. The first prevention member 300 is assembled to the first housing 800A, and the second prevention member 400 is assembled to the second housing 800B.
[0140] A cover 810 may be provided on each of the first housing 800A and the second housing 800B. The cover 810 may be provided to protrude in the axial direction from the first housing 800A. In addition, the cover 810 may be provided to protrude in the axial direction from the second housing 800B.
[0141] Since the shape and function of the cover 810 of the first housing 800A are the same as those of the cover 810 of the second housing 800B, hereinafter, description will be made based on the cover 810 of the first housing 800A.
[0142] As in Fig.23 and Fig.24 As illustrated in , the cover 810 may include a body 811 and a side wall 812 .
[0143] The body 811 is disposed in a direction perpendicular to the axial direction. The body 811 may have a plate shape. For example, the body 811 may have a quadrilateral plate shape.
[0144] The sidewall 812 may be provided on both side surfaces of the body 811. The sidewall 812 may extend in the axial direction on both side surfaces of the body 811. The two sidewalls 812 may be provided to face each other. The body 811 is located on the end portion of the sidewall 812 in the axial direction.
[0145] The cover 810 includes one side opening O1 and another side opening O2. The two side walls 812, the body 811 and the outer surface of the housing 800 form the one side opening O1 and the other side opening O2. The cover 810 forms a space where the first protection member 300 or the second protection member 400 is located.
[0146] Fig.25 It's a picture. Figure 1 Front view of the sensing device shown in FIG.
[0147] Reference Fig.25 , the cover 810 is disposed outside the first protection member 300. In addition, the cover 810 is disposed outside the second protection member 400. The cover 810 is disposed to overlap with the first protection member 300 in the axial direction. In addition, the cover 810 is disposed to overlap with the second protection member 400 in the axial direction.
[0148] Specifically, the body 811 of the cover 810 may be disposed to overlap the first region 310 of the first prevention member 300 in the axial direction 310. In addition, the body 811 of the cover 810 may be disposed to overlap the fourth region 410 of the second prevention member 400 in the axial direction.
[0149] Based on the axial direction, the body 811 is disposed to be spaced apart from the outer surface of the housing 800. The first region 310 is disposed to be 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. In addition, the fourth region 410 is disposed to be 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.
[0150] The sidewall 812 of the cover 810 is disposed to overlap the first bent portion 340 of the first protection member 300 in a direction perpendicular to the axial direction. In addition, the sidewall 812 of the cover 810 may be disposed to overlap the second bent portion 440 of the second protection member 400 in a direction perpendicular to the axial direction.
[0151] Fig.26 It's a picture. Figure 1 A plan view of the sensing device shown in FIG.
[0152] Reference Fig.26 , the first guard 300 is completely covered by the body 811 of the cover 810 in the axial direction. The cover 810 is arranged not to overlap with the stator 200, and the fifth area 420 of the second guard 400 is exposed without being covered by the cover 810. The size of the body 811 may be formed to be larger than that of the first area 310, so that the body 811 may completely cover the first area 310 of the first guard 300 in the axial direction.
[0153] Although not shown in the drawings, the second prevention member 400 is also completely covered by the body 811 of the cover member 810 like the first prevention member 300 .
[0154] Fig. 27 It's a picture. Figure 1 A side view of the sensing device shown in FIG.
[0155] Reference Fig. 27 , in a direction perpendicular to the axial direction, the first bent portion 340 of the first protective member 300 is completely covered by the side wall 812 of the cover member 810. The size of each of the side walls 812 may be formed to be larger than the size of the first bent portion 340, so that the side wall 812 completely covers the first bent portion 340 of the first protective member 300 in a direction perpendicular to the axial direction.
[0156] Although not shown in the drawings, the second bent portion 440 of the second prevention member 400 is also completely covered by the side wall 812 of the cover member 810 like the first prevention member 300 .
[0157] As described above, since the cover 810 structurally surrounds the outer side of the first protective member 300 or the outer side of the second protective member 400, the first protective member 300 or the second protective member 400 can be prevented from being broken due to external impact. In addition, since the cover 810 protecting the first protective member 300 or the second protective member 400 is provided on the housing 800, it is not necessary to provide an additional structure for protecting the first protective member 300 or the second protective member 400, and thus its structure is simple. In addition, as described above, the cover 810 is provided to overlap with the first protective member 300 or the second protective member 400 not only in the axial direction but also in the direction perpendicular to the axial direction, so as to effectively protect the first protective member 300 or the second protective member 400 from external impact.
[0158] like Figure 23 to Figure 25 As illustrated, since the first and second prevention members 300 and 400 are assembled through one side opening O1 and the other side opening O2 provided in the cover 810 , the first and second prevention members 300 and 400 are protected and the first and second prevention members 300 and 400 are easily assembled to the housing 800 .
[0159] Fig.28 8 is an enlarged view illustrating an inner portion of the cover 810 of the housing 800 .
[0160] Reference Fig.28The housing 800 may include a protrusion 801. The protrusion 801 protrudes from the outer surface of the housing 800 in the axial direction. The protrusion 801 is disposed to face the side wall 812 of the cover 810. The first bent portion 340 of the first protective member 300 and the second bent portion 440 of the second protective member 400 may be located between the side wall 812 and the protrusion 801.
[0161] The first protection member 300 and the second protection member 400 may be introduced into the interior of the cover member 810 in a direction perpendicular to the axial direction and assembled to the housing 800. In this case, during the assembly of the first protection member 300 and the second protection member 400, the side wall 812 and the protrusion 801 are used to align the first protection member 300 or the second protection member 400 to be assembled in the correct position by guiding the position of the first bent portion 340 or the second bent portion 440.
[0162] The above-described embodiments can be applied to various devices used in vehicles, home appliances, and the like.
Claims
1. A sensor device, comprising: Rotor; a stator, the stator being arranged to correspond to the rotor; A first protective member and a second protective member, wherein the first protective member and the second protective member are respectively arranged on one side of the stator; a first collector and a second collector, wherein the first collector and the second collector are disposed between the first protection member and the second protection member; as well as a Hall sensor, the Hall sensor being arranged between the first collector and the second collector, wherein the first protection member is arranged to be spaced apart from the first collector and the second collector, and The second guard is disposed to be spaced apart from the first collector and the second collector.
2. The sensor device according to claim 1, wherein: The first protection member includes a first region located at a first side of the stator in an axial direction, a second region provided at a second side of the stator, and a third region connecting the first region and the second region; and The second preventing member includes a fourth region located at the second side of the stator in the axial direction, a fifth region located at the first side of the stator, and a sixth region connecting the fourth region and the fifth region.
3. The sensor device according to claim 2, wherein: The second region is arranged to overlap with the stator in the axial direction; and The fourth region is disposed so as to overlap with the stator in the axial direction.
4. The sensor device according to claim 2, wherein: The first guard member includes a first bent portion bent from an end portion of the first region toward the second guard member; and The second prevention member includes a second bent portion bent from an end portion of the second region toward the first prevention member.
5. The sensor device according to claim 1, wherein: The first collector comprises: first ontology; a first leg, the first leg being bent from the first body toward the Hall sensor; and a first extension portion, the first extension portion being arranged on the first body so as to overlap with the stator in the axial direction, wherein the shape of the first extension portion overlapping with the stator in the axial direction is configured to correspond to the shape of the fifth region, and The fifth region has a size greater than that of the first extending portion so as to cover the first extending portion in the axial direction.
6. A sensor device comprising: Rotor; a stator, the stator being arranged to correspond to the rotor; A first protective member and a second protective member, wherein the first protective member and the second protective member are respectively arranged on one side of the stator; a first collector and a second collector, wherein the first collector and the second collector are disposed between the first protection member and the second protection member; A Hall sensor, wherein the Hall sensor is disposed between the first collector and the second collector; as well as a housing, the housing being arranged on the outer side of the stator, Wherein, the first protective member and the second protective member are arranged on the outside of the housing, The first collector and the second collector are arranged on the inner side of the shell, The housing includes a cover member disposed outside the first protection member and the second protection member, and The body of the cover is disposed to overlap with the first protection member in the axial direction and to overlap with the second protection member in the axial direction.
7. The sensor device according to claim 6, wherein: The cover comprises a side wall connecting the body and the housing; and The side wall is disposed so as to overlap with the first prevention member in a direction perpendicular to the axial direction, and to overlap with the second prevention member in the direction perpendicular to the axial direction.
8. The sensor device according to claim 7, wherein: The first protection member includes a first region located at a first side of the stator in the axial direction, a second region located at a second side of the stator, and a third region connecting the first region and the second region; and The second preventing member includes a fourth region located at the second side of the stator in the axial direction, a fifth region located at 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 with the first region in the axial direction and to overlap with the fourth region in the axial direction.
10. The sensor device according to claim 3, wherein: The first guard member includes a first bent portion bent from an end portion of the first region toward the second guard member; The second guard member includes a second bent portion bent from an end portion of the second region toward the first guard member; and The body is disposed to overlap with the first bent portion in a direction perpendicular to the axial direction, and to overlap with the second bent portion in the direction perpendicular to the axial direction.