Magnetic sensor structure and vehicle steering system

Abstract

The utility model provides a magnetic sensor structure and a vehicle steering system, and belongs to the technical field of vehicle engineering steer-by-wire systems. The magnetic sensor structure comprises a magnetic sensor and at least one magnetic shielding assembly. The magnetic sensor comprises a supporting piece and at least one magnetic detection device. The magnetic detection device comprises a first magnetic detection assembly and a second magnetic detection assembly which are sequentially arranged on the supporting piece; the magnetic shielding assembly comprises a first shielding piece, and at least one of the first magnetic detection assembly and the second magnetic detection assembly is covered with the first shielding piece. According to the magnetic sensor structure provided by the invention, an interference magnetic field or an interference signal around at least one of the first magnetic detection assembly and the second magnetic detection assembly can be shielded and isolated through the first shielding piece, so that the influence of interference of the interference magnetic field or the interference signal on the detection precision of the first magnetic detection assembly and the second magnetic detection assembly is avoided; and the detection precision of the steering wheel or the wheel steering angle is high.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle engineering steer-by-wire systems, and in particular to a magnetic sensor structure and a vehicle steering system. Background Art

[0002] Steer-by-wire (SBW) technology eliminates the steering column connecting the steering wheel to the steering actuator. By replacing the traditional mechanical connection with electronic signals, it achieves electrical control between the vehicle's steering wheel and wheels. Therefore, in a closed-loop control system, the steering wheel angle and wheel steering values—that is, the steering or displacement measurements of the steering bar—must be fed back to the steering controller.

[0003] In the related art, the vehicle steering system sets up a Hall sensor and a magnetoresistive sensor, uses a Hall chip to detect the magnetic field changes of the Hall magnet and uses a magnetoresistive chip to detect the magnetic field changes of the magnetoresistive magnet, so that the steering controller receives the corresponding electrical signal to process and determine the steering angle of the vehicle steering wheel.

[0004] However, in some application scenarios, the detection accuracy of the above detection method is low, which affects the user's driving experience. Utility Model Content

[0005] The present application provides a magnetic sensor structure and a vehicle steering system to address the deficiencies in the related art.

[0006] On the one hand, the present application provides a magnetic sensor structure, including a magnetic sensor and at least one magnetic shielding component; the magnetic sensor includes a support and at least one magnetic detection device; the magnetic detection device includes a first magnetic detection component and a second magnetic detection component arranged in sequence on the support; the magnetic shielding component includes a first shielding component, and the first shielding component is covered on at least one of the first magnetic detection component and the second magnetic detection component.

[0007] In one possible implementation, the magnetic sensor structure provided by the present application, the first magnetic detection component includes a first detection member and a first magnet arranged opposite to the first detection member along a first direction; the second magnetic detection component includes a second detection member and a second magnet arranged opposite to the second detection member along the first direction, and the first magnet and the second magnet are arranged at intervals along the second direction; at least one of the first magnet and the second magnet is covered with a first shielding member; wherein the first direction and the second direction are perpendicular.

[0008] In one possible implementation, the magnetic sensor structure provided by the present application, the first shielding member is a magnetic shielding ring, at least one of the first magnet and the second magnet and the corresponding one of the first detection member and the second detection member are placed in the magnetic shielding ring; the magnetic shielding assembly also includes a second shielding member, at least one of the first magnet and the second magnet is connected to the second shielding member so that at least one of the first magnet and the second magnet is located between the second shielding member and the corresponding one of the first detection member and the second detection member.

[0009] In a possible implementation, in the magnetic sensor structure provided by the present application, a plurality of notches are formed on the second shielding member, and the plurality of notches are spaced apart along a circumference of the second shielding member.

[0010] In a possible implementation, in the magnetic sensor structure provided by the present application, both the first shielding member and the second shielding member are ferromagnetic members.

[0011] In a possible implementation, in the magnetic sensor structure provided by the present application, the first shielding member is connected to the supporting member by injection molding, and at least one of the first magnet and the second magnet is connected to the second shielding member by injection molding.

[0012] In one possible implementation, the magnetic sensor structure provided by the present application, the support member includes a shell portion and a shielding portion; the shell portion has at least two storage slots arranged in sequence, the first shielding member is connected to the inner wall of one of the two storage slots, the first magnet and the second magnet are arranged in the storage slots in a one-to-one correspondence, and the first detection member and the second detection member are covered on the corresponding storage slots; the shielding portion is connected to the shell portion to shield the first detection member and the second detection member.

[0013] In a possible implementation, in the magnetic sensor structure provided by the present application, one of the first detection element and the second detection element is a Hall sensor chip, and the other is a magnetoresistive sensor chip.

[0014] On the other hand, the present application provides a vehicle steering system, including a control component, a transmission component and any of the above-mentioned magnetic sensor structures; the control component includes a control part and an interface, the interface is arranged on the support part of the magnetic sensor structure, and the first magnetic detection component and the second magnetic detection component of the magnetic sensor structure are both communicatively connected to the control part through the interface.

[0015] In one possible implementation, the vehicle steering system provided in the present application further includes at least one transmission assembly, the transmission assembly including a first transmission member and a second transmission member transmission-connected to the first transmission member; the first transmission member is connected to the first magnet of the first magnetic detection assembly, and the second transmission member is connected to the second magnet of the second magnetic detection assembly. The first transmission member has a transmission part, which is used to be coaxially connected to one of the steering wheel motor shaft and the steering crossbar. The transmission part is configured to drive the first magnet to rotate following one of the steering wheel motor shaft and the steering crossbar, so that the second transmission member drives the second magnet to rotate.

[0016] The magnetic sensor structure and vehicle steering system provided by the present application are characterized in that the magnetic sensor structure arranges the first magnetic detection component and the second magnetic detection component of the magnetic detection device on the support in sequence by setting a support, at least one magnetic detection device and at least one first shielding component, and a first shielding component is provided on at least one of the first magnetic detection component and the second magnetic detection component. In this way, when the magnetic sensor structure is applied to the vehicle steering system, when detecting the steering angle of the steering wheel or the wheel, at least one of the first magnetic detection component and the second magnetic detection component is isolated from the adjacent first magnetic detection component and the second magnetic detection component by the first shielding component. For example, the interfering magnetic field or interfering signal around at least one of the first magnetic detection component and the second magnetic detection component can be shielded and isolated by the first shielding component to avoid the interference of the interfering magnetic field or the interfering signal on the detection accuracy of the first magnetic detection component and the second magnetic detection component. The magnetic sensor structure provided by the present application has high detection accuracy for the steering angle of the steering wheel or the wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] Figure 1 A schematic diagram of the structure of the magnetic sensor provided in an embodiment of the present application;

[0019] Figure 2 for Figure 1 AA section view;

[0020] Figure 3 for Figure 1 Structural diagram from another angle;

[0021] Figure 4 A connection diagram of the second magnet, the second transmission member, and the second shielding member in the vehicle steering system provided by an embodiment of the present application;

[0022] Figure 5 A connection diagram of the first magnetic detection component, the second magnetic detection component, and the magnetic shielding component in the magnetic sensor structure provided in an embodiment of the present application;

[0023] Figure 6 A diagram showing the connection between the second shielding member and the second magnet in the magnetic sensor structure provided in an embodiment of the present application;

[0024] Figure 7 A connection diagram of a transmission assembly, a first magnetic detection assembly, a second magnetic detection assembly, and a magnetic shielding assembly in a vehicle steering system provided in an embodiment of the present application;

[0025] Figure 8 This is a schematic diagram of a portion of the structure of the support member in the magnetic sensor structure provided in an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 100-magnetic sensor;

[0028] 110-support member; 111-housing portion; 1111-storage slot; 1112-avoidance opening; 112-shielding portion; 113-limiting plate; 114-buckle;

[0029] 120 - first magnetic detection assembly; 121 - first detection member; 122 - first magnet;

[0030] 130 - second magnetic detection assembly; 131 - second detection member; 132 - second magnet;

[0031] 140-circuit board;

[0032] 200-magnetic shielding assembly;

[0033] 210 - first shielding member; 211 - accommodating cavity; 212 - opening;

[0034] 220 - second shielding member; 221 - notch;

[0035] 300-interface;

[0036] 400-transmission components;

[0037] 410 - first transmission member; 411 - first connecting portion; 412 - first gear portion; 413 - transmission portion;

[0038] 420 - second transmission member; 421 - second connecting portion; 422 - second gear portion. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0041] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0042] The terms "first," "second," "third," "fourth," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the application described herein can, for example, be implemented in an order other than that illustrated or described herein.

[0043] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0044] As mentioned in the background technology, the vehicle steering system in the related technology is equipped with a Hall sensor and a magnetoresistive sensor, using a Hall chip to detect the magnetic field changes of the Hall magnet and using a magnetoresistive chip to detect the magnetic field changes of the magnetoresistive magnet, so that the steering controller receives the corresponding electrical signal to process and determine the steering angle of the vehicle steering wheel.

[0045] However, in order to enable both the Hall magnet and the reluctance magnet to generate a changing magnetic field as the steering wheel motor shaft rotates, the distance between the two is usually designed to be relatively close. As a result, during use, the magnetic fields generated by the Hall magnet and the reluctance magnet will interfere with each other, thereby affecting the accuracy of the electrical signal received by the steering controller. Therefore, the detection accuracy of the above detection method is low, which affects the user's driving experience.

[0046] In view of this, an embodiment of the present application provides a magnetic sensor structure and a vehicle steering system. The magnetic sensor structure arranges the first magnetic detection component and the second magnetic detection component of the magnetic detection device on the support member in sequence by setting a support member, at least one magnetic detection device and at least one first shielding member, and a first shielding member is provided on at least one of the first magnetic detection component and the second magnetic detection component. In this way, when the magnetic sensor structure is applied to the vehicle steering system, when detecting the steering angle of the steering wheel or wheel, at least one of the first magnetic detection component and the second magnetic detection component is isolated from the adjacent first magnetic detection component and the second magnetic detection component by the first shielding member. For example, the first shielding member can be used to shield and isolate the interfering magnetic field or interference signal around at least one of the first magnetic detection component and the second magnetic detection component to avoid the interfering magnetic field or interference signal affecting the detection accuracy of the first magnetic detection component and the second magnetic detection component. The magnetic sensor structure provided by the present application has high detection accuracy for the steering angle of the steering wheel or wheel.

[0047] Hereinafter, the present application will be described in detail with reference to the accompanying drawings and specific embodiments.

[0048] See Figure 1 and Figure 2 The magnetic sensor structure provided by the embodiment of the present application includes a magnetic sensor 100 and at least one magnetic shielding assembly 200; the magnetic sensor 100 includes a support member 110 and at least one magnetic detection device; the magnetic detection device includes a first magnetic detection assembly 120 and a second magnetic detection assembly 130 sequentially arranged on the support member 110; the magnetic shielding assembly 200 includes a first shielding member 210, and the first shielding member 210 is covered on at least one of the first magnetic detection assembly 120 and the second magnetic detection assembly 130.

[0049] Specifically, the support member 110 serves as a placement platform for other components in the magnetic sensor structure, and is used to ensure that the relative positions between the components remain stable.

[0050] The magnetic sensor structure of the embodiment of the present application is provided with a support 110, at least one magnetic detection device and at least one first shielding member, and the first magnetic detection component 120 and the second magnetic detection component 130 of the magnetic detection device are sequentially provided on the support 110. The first shielding member 210 is provided on at least one of the first magnetic detection component 120 and the second magnetic detection component 130. In this way, when the magnetic sensor structure is applied to a vehicle steering system and the steering angle of a steering wheel or a wheel is detected, at least one of the first magnetic detection component 120 and the second magnetic detection component 130 is isolated from the adjacent first magnetic detection component 120 and the second magnetic detection component 130 by the first shielding member 210. For example, the first shielding member 210 can shield and isolate the interfering magnetic field or interfering signal around at least one of the first magnetic detection component 120 and the second magnetic detection component 130, thereby preventing the interfering magnetic field or the interfering signal from affecting the detection accuracy of the first magnetic detection component 120 and the second magnetic detection component 130, and improving the detection accuracy of the steering angle of the steering wheel or the wheel.

[0051] Exemplarily, the first magnetic detection component 120 includes a first detection member 121 and a first magnet 122 arranged opposite to the first detection member 121 along the first direction; the second magnetic detection component 130 includes a second detection member 131 and a second magnet 132 arranged opposite to the second detection member 131 along the first direction, and the first magnet 122 and the second magnet 132 are spaced apart along the second direction; a first shielding member 210 is provided on at least one of the first magnet 122 and the second magnet 132; wherein the first direction and the second direction are perpendicular.

[0052] The first direction is as follows Figure 2 The Z direction is shown, and the second direction is as shown Figure 2 The X direction is shown.

[0053] In the embodiment of the present application, a first detecting member 121 and a first magnet 122 arranged opposite to the first detecting member 121 along the first direction are arranged on the support member 110, and a second detecting member 131 and a second magnet 132 arranged opposite to the second detecting member 131 along the first direction are arranged, and the first magnet 122 and the second magnet 132 are arranged at intervals along the second direction. In this way, when the magnetic sensor structure is applied to the vehicle steering system, the first magnet 122 and the second magnet 132 can be connected to one of the steering wheel motor shaft and the steering cross bar respectively through a connecting member, or the first magnet 122 can be connected to the second magnet 132 through a transmission mechanism, and the connecting member or the transmission mechanism is used to follow the rotation of one of the steering wheel motor shaft and the steering cross bar to rotate the first magnet 122 and the second magnet 132, so that the magnetic field changes generated by the rotation of the first magnet 122 are detected by the first detection member 121 and the magnetic field changes generated by the rotation of the second magnet 132 are detected by the second detection member 131, so that the steering controller receives an electrical signal to determine the steering angle of the steering wheel or the steering cross bar based on the combined detection of the first detection member 121 and the second detection member 131.

[0054] Furthermore, by setting a first shielding member 210 on at least one of the first magnet 122 and the second magnet 132, the magnetic field around the covered magnet is shielded by the first shielding member 210, thereby preventing the magnetic field generated by the first magnet 122 from affecting the detection accuracy of the second detection member 131, and the magnetic field generated by the second magnet 132 from affecting the detection accuracy of the first detection member 121, which is beneficial to improving the detection accuracy of the steering wheel or wheel steering angle.

[0055] The first shielding member 210 can be connected to the support member 110 to ensure better stability of the first shielding member 210, thereby preventing the first shielding member 210 from shifting due to vibration or other reasons during vehicle driving, thereby preventing the shielding effect of the magnetic field around one of the first magnet 122 and the second magnet 132 from being affected.

[0056] Combine Figures 1 to 4 The present application also provides a vehicle steering system, including a control component and the magnetic sensor structure of the aforementioned embodiment; the control component includes a control member (not shown) and an interface 300, the interface 300 being disposed on the support member 110 of the magnetic sensor structure, and the first magnetic detection component 120 and the second magnetic detection component 130 of the magnetic sensor structure being communicatively connected to the control member via the interface 300.

[0057] The control component may be a steering controller, and the overall structure and working principle of the magnetic sensor structure are the same as those in the aforementioned embodiment, and will not be described in detail here.

[0058] It is understandable that the vehicle steering system is configured with a control component and an interface 300 to ensure that the control component can receive an electrical signal through the interface 300 to determine the steering angle of the steering wheel or steering rod based on the combined detection of the first magnetic detection component 120 and the second magnetic detection component 130.

[0059] The vehicle steering system of the embodiment of the present application is provided with a magnetic sensor structure, which uses the magnetic sensor structure to detect the steering angle of the steering wheel and feeds it back to the control component, or uses the magnetic sensor structure to detect the steering of the steering crossbar and feeds it back to the control component, so that the control component can accurately respond to the driver's operation to make steering adjustments, which is beneficial to improving the steering accuracy and response speed.

[0060] Furthermore, the vehicle steering system also includes a transmission assembly 400, which includes a first transmission member 410 and a second transmission member 420 that is transmission-connected to the first transmission member 410; the first transmission member 410 is connected to the first magnet 122 of the first magnetic detection assembly 120, and the second transmission member 420 is connected to the second magnet 132 of the second magnetic detection assembly 130. The first transmission member 410 has a transmission part 413, which is used to be coaxially connected to one of the steering wheel motor shaft and the steering crossbar. The transmission part 413 is configured to drive the first magnet 122 to rotate following one of the steering wheel motor shaft and the steering crossbar, so that the second transmission member 420 drives the second magnet 132 to rotate.

[0061] Specifically, by providing a first transmission member 410 and a second transmission member 420 that is transmission-connected to the first transmission member 410, the transmission portion 413 of the first transmission member 410 is coaxially connected to one of the steering wheel motor shaft and the steering crossbar, so that when one of the rotating motor shaft and the steering crossbar rotates, the first magnet 122 and the second magnet 132 can rotate accordingly.

[0062] Exemplarily, the transmission part 413 is coaxially connected to the steering wheel motor shaft, and the first detection member 121 and the second detection member 131 are electrically connected to the control member through the interface 300. The first detection member 121 transmits an electrical signal of the magnetic field change generated by the rotation of the detected first magnet 122 to the control member to determine the rotation angle of the first transmission member 410. The second detection member 131 transmits an electrical signal of the magnetic field change generated by the rotation of the detected second magnet 132 to the control member to determine the rotation angle of the second transmission member 420. In this way, the control member can determine the absolute steering angle of the steering wheel according to the steering angle of the first transmission member 410 and the steering angle of the second transmission member 420; that is, when the driver turns the steering wheel quickly, the control member can quickly adjust the motor output through feedback from the first detection member 121 and the second detection member 131, to ensure that the wheel responds quickly and provides more agile steering performance.

[0063] See Figure 3 and Figure 4 In some examples, the first transmission member 410 includes a first connecting portion 411 and a first gear portion 412, the first connecting portion 411 and the transmission portion 413 are located on opposite sides of the first gear portion 412, and the first connecting portion 411 and the transmission portion 413 are both connected to the first gear portion 412; the first connecting portion 411 is connected to the first magnet 122, and the second transmission member 420 includes a second connecting portion 421 and a second gear portion 422 connected in sequence, the second connecting portion 421 is connected to the second magnet 132, and the second gear portion 422 is transmission-connected to the first gear portion 412.

[0064] Specifically, the transmission part 413 can be a rod-shaped structure, and a placement groove 4111 matching the first magnet 122 can be opened on the first connecting part 411, and the first magnet 122 is interference fit into the placement groove 4111. Exemplarily, the first connecting part 411, the first gear part 412 and the transmission part 413 are integrally formed by an injection molding process.

[0065] Furthermore, the second connecting portion 421 , the second gear portion 422 and the second magnet 132 may be integrally formed by an injection molding process.

[0066] In specific implementation, high-precision transmission between the second gear portion 422 and the first gear portion 412 ensures that the first magnet 122 and the second magnet 132 rotate synchronously with the motor shaft, which helps to avoid detection errors caused by transmission errors.

[0067] It should be noted that the embodiment of the present application detects the steering wheel steering angle by combining the first magnetic detection component 120 and the second magnetic detection component 130, wherein the first gear portion 412 and the second gear portion 422 have different numbers of teeth. Exemplarily, the gear ratio of the first gear portion 412 to the second gear portion 422 is 5:4. For example, the number of teeth of the first gear portion 412 is 10, and the number of teeth of the second gear portion 422 is 8. In this way, it can be used for steering wheel angle detection of ±720° and for detection of the currently common ±540° angle range. The redundant setting further improves the reliability of the absolute steering angle detection of the steering wheel.

[0068] It can be understood that since the number of teeth of the first gear part 412 and the second gear part 422 is different, the control part can perform a cursor algorithm on the steering angle of the first gear part 412 detected by the first detection part 121 and the steering angle of the second gear part 422 detected by the second detection part 131, thereby calculating the absolute steering wheel angle.

[0069] See Figure 2 、 Figure 4 and Figure 5In some embodiments, the first shielding member 210 is a magnetic shielding ring, and at least one of the first magnet 122 and the second magnet 132 and the corresponding one of the first detection member 121 and the second detection member 131 are both placed in the magnetic shielding ring; the magnetic shielding assembly 200 also includes a second shielding member 220, and at least one of the first magnet 122 and the second magnet 132 is connected to the second shielding member 220 so that at least one of the first magnet 122 and the second magnet 132 is located between the second shielding member 220 and the corresponding one of the first detection member 121 and the second detection member 131.

[0070] In this way, the first shielding member 210 has a simple structure and is easy to produce and process.

[0071] Specifically, there is a accommodating cavity 211 in the magnetic shielding ring, and openings 212 are provided on opposite sides of the magnetic shielding ring; wherein, the accommodating cavity 211 can provide a circumferentially closed environment for the first magnetic detection component 120 or the second magnetic detection component 130 covered therein to shield interfering magnetic fields and interference signals.

[0072] The opening 212 can facilitate the first magnetic detection component 120 or the second magnetic detection component 130 to enter and exit the accommodating cavity 211 during installation and maintenance. For example, Figure 2 and Figure 4 As shown, the first shielding member 210 is covered on the second magnet 132, and the first shielding member 210 is provided with openings 212 on opposite sides along the first direction, namely, the upper side and the lower side in the Z direction; when installed, the second magnet 132 and the second connecting portion 421 in the second transmission member 420 connected thereto extend into the accommodating cavity 211 through the opening 212 on the lower side, and the second detection member 131 sinks into the accommodating cavity 211 through the opening 212 on the upper side; wherein, the second gear portion 422 of the second transmission member 420 is exposed outside the accommodating cavity 211, so as to facilitate transmission connection with the first gear portion 412 of the first transmission member 410.

[0073] It is understandable that by sinking the second detecting member 131 into the accommodating cavity 211 , magnetic field interference can be reduced and the detection accuracy of the second detecting member 131 can be improved.

[0074] It can be understood that the first shielding member 210 in the aforementioned embodiment can shield the magnetic field in the circumferential direction, and since the magnetic field generated by the first magnet 122 and the second magnet 132 is three-dimensional, the embodiment of the present application provides a second shielding member 220, and the second shielding member 220 is connected to one of the first magnet 122 and the second magnet 132, so that one of the first magnet 122 and the second magnet 132 is located between the second shielding member 220 and the corresponding one of the first detection member 121 and the second detection member 131; thereby, the end face magnetic field of one of the first magnet 122 and the second magnet 132 can be shielded by the second shielding member 220, thereby avoiding mutual interference between the first magnetic detection component 120 and the second magnetic detection component 130.

[0075] For example, in combination Figure 7 As shown, the second shielding member 220 is connected to the second magnet 132. The second shielding member 220, the second magnet 132 and the second transmission member 420 can be used as a whole. When the second magnet 132 and the second connecting portion 421 are placed in the accommodating cavity 211 through the opening 212 on the lower side of the first shielding member 210, as shown in FIG. Figure 2 and Figure 5 As shown, the second shielding member 220 is also located in the accommodating cavity 211 . In specific implementation, the projection of the second magnet 132 toward the lower opening 212 is located on the second shielding member 220 , thereby ensuring that the second shielding member 220 can more fully isolate the magnetic field.

[0076] The second shielding member 220 may be a plate-shaped structure, which has a simple structure and is convenient for production and processing.

[0077] In some embodiments, the first shielding member 210 is connected to the supporting member 110 by injection molding, and at least one of the first magnet 122 and the second magnet 132 is connected to the second shielding member 220 by injection molding.

[0078] Specifically, the injection molding connection enables a tight combination between the first shielding member 210 and the support member 110, and between at least one of the first magnet 122 and the second magnet 132 and the second shielding member 220, thereby preventing the first shielding member 210 and the second shielding member 220 from shifting due to vibration or the like during vehicle driving, thereby improving structural stability and detection accuracy.

[0079] See Figure 6 and Figure 7 In some examples, a plurality of notches 221 are formed on the second shielding member 220 , and the plurality of notches 221 are spaced apart along the circumference of the second shielding member 220 .

[0080] In a specific implementation, the second shielding member 220, the second magnet 132 and the second transmission member 420 are formed into a whole by injection molding. By opening a plurality of notches 221 on the second shielding member 220, a flow channel is provided for the glue flow during injection molding, which is conducive to improving production efficiency.

[0081] In a specific example, the first shielding member 210 and the second shielding member 220 are both ferromagnetic members.

[0082] Among them, ferromagnetic parts have good magnetic shielding performance and high magnetic permeability, which can effectively absorb and guide magnetic fields and reduce interference from external magnetic fields.

[0083] The embodiments of the present application do not limit the specific type of the ferromagnetic part. For example, the ferromagnetic part can be one of silicon steel, pure iron, nickel-iron alloy and iron-nickel-cobalt alloy.

[0084] See Figure 3 and Figure 8 In some examples, the support member 110 includes a shell portion 111 and a shielding portion 112; the shell portion 111 has at least two sequentially arranged receiving grooves 1111, the first shielding member 210 is connected to the inner wall of one of the two receiving grooves 1111, the first magnet 122 and the second magnet 132 are arranged in the receiving groove 1111 in a one-to-one correspondence, and the first detection member 121 and the second detection member 131 are covered on the corresponding receiving grooves 1111; the shielding portion 112 is connected to the shell portion 111 to shield the first detection member 121 and the second detection member 131.

[0085] Specifically, by providing at least two receiving grooves 1111 , the first magnet 122 and the second magnet 132 can maintain a more stable relative position relationship, which is beneficial to improving the accuracy and stability of the transmission connection between the first transmission member 410 and the second transmission member 420 .

[0086] When implementing it specifically, Figure 2 and Figure 4 As shown, the first detection member 121 and the second detection member 131 can be integrated on the circuit board 140, and the circuit board 140 is covered on the two receiving grooves 1111, so that the first detection member 121 and the second detection member 131 correspond to the two receiving grooves 1111 one by one.

[0087] Further, combined with Figure 3As shown, the bottom of the two receiving grooves 1111 are each provided with an avoidance opening 1112 to respectively avoid part of the first connecting part 411 and part of the second connecting part 421, so that the first gear part 412 connected to the first connecting part 411 and the second gear part 422 connected to the second connecting part 421 are both exposed outside the shell part 111, wherein the first gear part 412 is connected to the transmission part 413 on the side away from the shell part 111, and the transmission part 413 is connected to the steering motor shaft of the vehicle; in order to ensure the stability of the second gear part 422, a limit plate 113 can be set on the side of the second gear part 422 away from the shell part 111, the limit plate 113 is connected to the shell part 111, and there is a gap between the second gear part 422 and the limit plate 113. Such a setting can avoid the second gear part 422 from falling off and the limit plate 113 from interfering with the rotation of the second gear part 422.

[0088] The embodiment of the present application does not limit the connection direction of the shielding portion 112 and the shell portion 111. For example, the shielding portion 112 and the shell portion 111 can be detachably connected by a buckle 114, which facilitates the disassembly and assembly of the two and facilitates the maintenance of other components.

[0089] In a specific example, one of the first detection element 121 and the second detection element 131 is a Hall sensor chip, and the other is a magnetoresistive sensor chip.

[0090] The sensitivity of the Hall sensor chip to changes in the magnetic field can provide high-precision detection; at the same time, the output of the Hall sensor chip is linearly related to the magnetic field strength, which facilitates signal processing.

[0091] The magnetoresistive sensor chip has high resolution and can detect tiny changes in the magnetic field. At the same time, the magnetoresistive sensor chip has a high signal-to-noise ratio and can provide stable detection signals in complex environments.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A magnetic sensor structure, characterized in that: It comprises a magnetic sensor (100) and at least one magnetic shielding assembly (200); The magnetic sensor (100) comprises a support member (110) and at least one magnetic detection device; the magnetic detection device comprises a first magnetic detection component (120) and a second magnetic detection component (130) sequentially arranged on the support member (110); The magnetic shielding assembly (200) comprises a first shielding member (210), and the first shielding member (210) is provided on at least one of the first magnetic detection assembly (120) and the second magnetic detection assembly (130).

2. The magnetic sensor structure according to claim 1, wherein: The first magnetic detection component (120) comprises a first detection member (121) and a first magnet (122) disposed opposite to the first detection member (121) along a first direction; the second magnetic detection component (130) comprises a second detection member (131) and a second magnet (132) disposed opposite to the second detection member (131) along the first direction, and the first magnet (122) and the second magnet (132) are spaced apart along a second direction; The first shielding member (210) is provided on at least one of the first magnet (122) and the second magnet (132); wherein the first direction is perpendicular to the second direction.

3. The magnetic sensor structure according to claim 2, wherein: The first shielding member (210) is a magnetic shielding ring, and at least one of the first magnet (122) and the second magnet (132) and the corresponding one of the first detection member (121) and the second detection member (131) are both placed in the magnetic shielding ring; The magnetic shielding assembly (200) further includes a second shielding member (220), and at least one of the first magnet (122) and the second magnet (132) is connected to the second shielding member (220) so that at least one of the first magnet (122) and the second magnet (132) is located between the second shielding member (220) and the corresponding one of the first detection member (121) and the second detection member (131).

4. The magnetic sensor structure according to claim 3, characterized in that The second shielding member (220) is provided with a plurality of notches (221), and the plurality of notches (221) are arranged at intervals along the circumference of the second shielding member (220).

5. The magnetic sensor structure according to claim 3, characterized in that The first shielding member (210) and the second shielding member (220) are both ferromagnetic members.

6. The magnetic sensor structure according to claim 3, characterized in that The first shielding member (210) is connected to the supporting member (110) by injection molding, and at least one of the first magnet (122) and the second magnet (132) is connected to the second shielding member (220) by injection molding.

7. The magnetic sensor structure according to any one of claims 2 to 6, characterized in that: The support member (110) comprises a housing portion (111) and a shielding portion (112); The housing portion (111) has at least two sequentially arranged receiving grooves (1111), the first magnet (122) and the second magnet (132) are arranged in the receiving grooves (1111) in a one-to-one correspondence, and the first detection member (121) and the second detection member (131) are covered on the corresponding receiving grooves (1111); The shielding portion (112) is connected to the housing portion (111) to shield the first detecting member (121) and the second detecting member (131).

8. The magnetic sensor structure according to any one of claims 2 to 6, characterized in that: One of the first detection component (121) and the second detection component (131) is a Hall sensor chip, and the other is a magnetoresistive sensor chip.

9. A vehicle steering system, characterized in that: comprising a control component and a magnetic sensor structure according to any one of claims 1 to 8; The control component comprises a control member and an interface (300), wherein the interface (300) is arranged on a support member (110) of the magnetic sensor structure, and both a first magnetic detection component (120) and a second magnetic detection component (130) of the magnetic sensor structure are communicatively connected with the control member via the interface (300).

10. The vehicle steering system according to claim 9, characterized in that: The invention also includes at least one transmission assembly (400), wherein the transmission assembly (400) includes a first transmission member (410) and a second transmission member (420) transmission-connected to the first transmission member (410); The first transmission member (410) is connected to the first magnet (122) of the first magnetic detection component (120), and the second transmission member (420) is connected to the second magnet (132) of the second magnetic detection component (130). The first transmission member (410) has a transmission portion (413), and the transmission portion (413) is used to be coaxially connected to one of the steering wheel motor shaft and the steering crossbar. The transmission part (413) is configured to drive the first magnet (122) to rotate along with one of the steering wheel motor shaft and the steering crossbar, so that the second transmission member (420) drives the second magnet (132) to rotate.

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