Steering system, control method, and vehicle

Abstract

The application discloses a kind of steering system, control method and vehicle, the steering system includes: driving piece;Transmission assembly;Connecting shaft, detection part is formed on the connecting shaft;Detection device, the detection device is formed with the accommodating space suitable for accommodating the detection part, multiple secondary coils are provided in the accommodating space, the detection part moves in the accommodating space and generates induced voltage in multiple secondary coils, the detection device drives the moving stroke of the connecting shaft according to the induced voltage.The steering system according to the application is matched with multiple secondary coils by setting multiple secondary coils, so that the steering system can obtain the moving position of the connecting shaft according to the ratio of different induced voltage on multiple secondary coils, improve the anti-interference of the detection device to external magnetic field, improve the control accuracy of the steering system when the steering angle of steering knuckle is large, which is beneficial to increase the steering angle range of steering knuckle and improve the driving safety of vehicle.

Description

Technical Field

[0001] This invention relates to the automotive field, and more particularly to a steering system, control method, and vehicle. Background Technology

[0002] With the development of automotive technology, people have increasingly higher requirements for the comfort, handling, and safety of automobiles. Traditional automotive steering systems only have front-wheel steering, which is prone to oversteer during high-speed cornering, potentially leading to fishtailing and compromising vehicle stability. At low speeds, especially for large and medium-sized vehicles, the large turning radius also affects steering agility. Existing vehicles compensate for the shortcomings of front-wheel steering by adding a rear-wheel steering system. This system increases the steering angle and method of the rear wheels, making the vehicle more stable and agile at low speeds, and more stable and comfortable at high speeds. Since the rear-wheel steering system has no direct mechanical physical connection to the front-wheel steering and steering wheel mechanism, it falls under the category of steer-by-wire. Therefore, the linear displacement sensor in the rear-wheel steering system is crucial for vehicle safety. Currently, Hall effect linear displacement sensors are commonly used in rear-wheel steering systems, utilizing magnetic induction to detect the displacement of the rear-wheel steering mechanism.

[0003] In related technologies, the rear wheel steering system of a vehicle uses a Hall-effect linear displacement sensor, which works on the principle of magnetic induction. It is greatly affected by external magnetic fields, resulting in poor accuracy of the Hall-effect linear displacement sensor in detecting the position of the rear wheel when the rear wheel steering displacement is large. This limits the rear wheel steering angle, causing poor vehicle steering performance and affecting vehicle driving safety. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide a steering system. The steering system according to this invention, by configuring multiple secondary coils in cooperation with a detection unit, allows the steering system to obtain the moving position of the connecting shaft based on the ratio of different induced voltages on the multiple secondary coils. This improves the detection device's resistance to interference from external magnetic fields, enhances the steering system's control accuracy when the steering knuckle angle is large, and is beneficial for increasing the steering knuckle angle range and improving vehicle driving safety.

[0005] The present invention also proposes a control method for a steering system.

[0006] The present invention also proposes a vehicle having the above-described steering system.

[0007] The steering system for a vehicle according to the present invention includes: a drive member having a power output end; a transmission assembly having an input end connected to the power output end; a connecting shaft connected to a steering knuckle of the vehicle, the connecting shaft being linked to the output end of the transmission assembly and adapted to drive the steering knuckle to turn under the drive of the drive member, a detection portion being formed on the connecting shaft; and a detection device having a receiving space adapted to accommodate the detection portion, the detection device generating an alternating magnetic field within the receiving space, a plurality of secondary coils being disposed within the receiving space, the detection portion moving within the receiving space and generating an induced voltage within the plurality of secondary coils, the detection device driving the connecting shaft to move according to the induced voltage.

[0008] The steering system of the present invention comprises a driving component, a transmission assembly, a connecting shaft, and a detection device. The input and output ends of the transmission assembly are connected to the power output end of the driving component and the connecting shaft, respectively. A detection part is formed on the connecting shaft, and multiple secondary coils are arranged in the accommodating space of the detection device. This allows the connecting shaft to drive the vehicle's steering knuckle under the drive of the driving component. During the movement of the connecting shaft, the detection part on the connecting shaft moves within the accommodating space and generates different induced voltages on the multiple secondary coils. The steering system can calculate the ratio of the different induced voltages on the multiple secondary coils to obtain the moving position of the detection part and the connecting shaft. This realizes the detection function of the detection device and the steering function of the steering system, thereby improving the precise control of the steering knuckle steering angle by the steering system. In contrast, the Hall effect linear displacement sensor used in the rear wheel steering system of a vehicle is highly susceptible to interference from external magnetic fields. This results in poor accuracy in detecting the rear wheel position when the rear wheel steering displacement is large, limiting the rear wheel steering angle, leading to poor vehicle steering performance and affecting vehicle driving safety. In this invention, the detection device uses multiple secondary coils in conjunction with the detection unit. When the detection unit moves, different induced voltages are generated on the multiple secondary coils. The steering system calculates the position of the detection unit and the connecting shaft based on the ratio of the different induced voltages on the multiple secondary coils, thus avoiding the single interference of external magnetic fields on the multiple secondary coils. When the induced voltages of the multiple secondary coils change due to the influence of external magnetic fields, the ratio of the induced voltages of the multiple secondary coils remains unchanged, effectively improving the detection device's resistance to external magnetic fields. This, in turn, improves the control accuracy of the steering system when the steering knuckle steering angle is large, and expands the steering knuckle steering angle range, which helps to improve the vehicle's steering smoothness, accuracy, and driving safety.

[0009] According to one embodiment of the present invention, the detection device includes: a housing having the receiving cavity formed therein; a cover plate covering the housing and closing the receiving cavity, wherein a plurality of secondary coils are formed therein and the plurality of secondary coils are arranged in the extending direction of the cover plate.

[0010] According to one embodiment of the present invention, the detection unit includes: a positioning post disposed on the connecting shaft; and a sensing plate disposed on the positioning post and moving with the positioning post, wherein the sensing plate and the secondary coil are directly opposite each other in the thickness direction of the cover plate.

[0011] According to one embodiment of the present invention, the distance between the sensing sheet and the cover plate is d and satisfies: 0.3mm≤d≤1.1mm.

[0012] According to one embodiment of the present invention, the detection unit further includes: a support block, the support block being sleeved on the outer periphery of the positioning post, the support block having a support surface formed at one end facing the cover plate, and the sensing sheet being disposed on the support block and fitting against the support surface.

[0013] According to one embodiment of the present invention, a buffer is provided between the support block and the positioning post.

[0014] According to one embodiment of the present invention, the transmission assembly includes: a first pulley connected to the power output end; a second pulley linked to the first pulley, the second pulley having a first transmission thread formed therein; and a screw, the outer periphery of which is provided with a second transmission thread that meshes with the first transmission thread, the screw being connected to the connecting shaft.

[0015] According to one embodiment of the present invention, the travel distance of the connecting shaft is l and satisfies: 58mm≤l≤62mm.

[0016] The control method for a steering system according to the present invention is briefly described below.

[0017] The control method for a steering system in this invention may include the following steps:

[0018] S1. Obtain the first position signal of the drive component driving the connecting shaft to move, and obtain the second position signal of the connecting shaft movement detected by the detection device through the sensing sheet;

[0019] S2. Determine whether the steering system meets the driving conditions based on the first position signal and the second position signal.

[0020] The control method for the steering system in this invention calibrates a first position signal obtained from the movement of the drive shaft by the driving component with a second position signal detected by a detection device. This allows the steering system to perform different controls on the vehicle based on the calibration results. When the calibration result of the first and second position signals is within a preset acceptable range, the control method determines that the steering system meets the driving conditions, and the steering system can control the vehicle to operate normally. When the calibration result of the first and second position signals exceeds the preset acceptable range, the control method determines that the steering system does not meet the driving conditions, triggers a vehicle alarm, and takes further measures according to the safety level requirements. This control method for the steering system improves the control accuracy and safety of the steering system, further optimizes the vehicle's performance, and further ensures vehicle driving safety.

[0021] The vehicle according to the present invention is briefly described below.

[0022] The vehicle according to the present invention includes a front-wheel steering system and a rear-wheel steering system, which control the front and rear wheel steering of the vehicle, respectively. At least one of the front-wheel steering system and the rear-wheel steering system is configured as a steering system as described in any of the above embodiments. Because at least one of the front-wheel steering system and the rear-wheel steering system in the vehicle is configured as a steering system as described in any of the above embodiments, the steering system of the vehicle is equipped with multiple secondary coils that cooperate with the induction plate to enable the detection device to drive the movement of the connecting shaft according to the induced voltage of the multiple secondary coils. This effectively improves the detection device's resistance to interference from external magnetic fields, enhances the steering system's control accuracy when the steering knuckle angle is large, and increases the steering knuckle angle range, thereby improving the vehicle's steering smoothness, accuracy, and driving safety, resulting in a better user experience.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a cross-sectional schematic diagram of a transmission assembly and a drive component according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic cross-sectional view of the connection shaft, screw, and detection device according to an embodiment of the present invention;

[0027] Figure 3This is a flowchart of a control method for a steering system according to an embodiment of the present invention.

[0028] Figure label:

[0029] Drive component 1;

[0030] First pulley 21, second pulley 22, timing belt 23, screw 24, nut 25;

[0031] Connecting shaft 3, positioning post 31, sensing plate 32, support block 33, buffer 34;

[0032] Detection device 4. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] With the development of automotive technology, people have increasingly higher requirements for the comfort, handling, and safety of automobiles. Traditional automotive steering systems only have front-wheel steering, which is prone to oversteer during high-speed cornering, potentially leading to fishtailing and compromising vehicle stability. At low speeds, especially for large and medium-sized vehicles, the large turning radius also affects steering agility. Existing vehicles compensate for the shortcomings of front-wheel steering by adding a rear-wheel steering system. This system increases the steering angle and method of the rear wheels, making the vehicle more stable and agile at low speeds, and more stable and comfortable at high speeds. Since the rear-wheel steering system has no direct mechanical physical connection to the front-wheel steering and steering wheel mechanism, it falls under the category of steer-by-wire. Therefore, the linear displacement sensor in the rear-wheel steering system is crucial for vehicle safety. Currently, Hall effect linear displacement sensors are commonly used in rear-wheel steering systems, utilizing magnetic induction to detect the displacement of the rear-wheel steering mechanism.

[0035] In related technologies, the rear wheel steering system of automobiles uses Hall effect linear displacement sensors, which work on the principle of magnetic induction. They are greatly affected by external magnetic fields, resulting in poor accuracy of the Hall effect linear displacement sensor in detecting the position of the rear wheels when the rear wheel steering displacement is large. This limits the rear wheel steering angle, causing poor vehicle steering performance and affecting vehicle driving safety.

[0036] The following is for reference. Figures 1-3 A steering system according to an embodiment of the present invention is described.

[0037] The steering system for vehicles according to the present invention includes a drive component 1, a transmission assembly, a connecting shaft 3, and a detection device 4. The drive component 1 provides power to some other components of the steering system and has a power output end. The input end of the transmission assembly is connected to the power output end, and the drive component 1 drives the transmission assembly to move. The transmission assembly can change the torque output by the power output end of the drive component 1 to meet the working requirements of some other components within the steering system. The connecting shaft 3 is connected to the vehicle's steering knuckle and is linked to the output end of the transmission assembly. The connecting shaft 3 is adapted to drive the steering knuckle to turn under the drive of the drive component 1, thereby realizing the steering function of the steering system. A detection part is formed on the connecting shaft 3, and the detection part can move together with the connecting shaft 3 when it moves. The detection device 4 has a receiving space suitable for accommodating the detection part. The detection device 4 can generate an alternating magnetic field within the receiving space, and multiple secondary coils are arranged within the receiving space. The detection part can move within the receiving space and generate different induced voltages on the multiple secondary coils respectively. The detection device 4 can drive the connecting shaft 3 to move according to the induced voltage.

[0038] The steering system of the present invention comprises a drive component 1, a transmission assembly, a connecting shaft 3, and a detection device 4. The input and output ends of the transmission assembly are connected to the power output end of the drive component 1 and the connecting shaft 3, respectively. A detection part is formed on the connecting shaft 3, and multiple secondary coils are arranged in the accommodating space of the detection device 4. This allows the connecting shaft 3 to drive the steering knuckle of the vehicle under the drive of the drive component 1. During the movement of the connecting shaft 3, the detection part on the connecting shaft 3 moves within the accommodating space and generates different induced voltages on the multiple secondary coils. The steering system can calculate the ratio of the different induced voltages on the multiple secondary coils to obtain the moving position of the detection part and the connecting shaft 3. This realizes the detection function of the detection device 4 and the steering function of the steering system, thereby improving the precise control of the steering knuckle steering angle of the steering system. In contrast, the Hall effect linear displacement sensor used in the rear wheel steering system of a vehicle is highly susceptible to interference from external magnetic fields. This results in poor accuracy in detecting the rear wheel position when the rear wheel steering displacement is large, limiting the rear wheel steering angle, leading to poor vehicle steering performance and affecting vehicle driving safety. In this invention, the detection device 4 uses multiple secondary coils in conjunction with the detection unit. When the detection unit moves, different induced voltages are generated on the multiple secondary coils. The steering system calculates the position of the detection unit and the connecting shaft 3 based on the ratio of the different induced voltages on the multiple secondary coils, thereby avoiding the single interference of external magnetic fields on the multiple secondary coils. When the induced voltages of the multiple secondary coils change due to the influence of external magnetic fields, the ratio of the induced voltages of the multiple secondary coils remains unchanged, effectively improving the anti-interference capability of the detection device 4 against external magnetic fields. This, in turn, improves the control accuracy of the steering system when the steering knuckle steering angle is large, and expands the steering knuckle steering angle range, which helps to improve the vehicle's steering stability, accuracy, and driving safety.

[0039] Furthermore, in a specific embodiment of the present invention, a primary coil oscillator is also provided in the accommodating space of the detection device 4. The primary coil oscillator can generate a high-frequency alternating magnetic field under the action of current. The high-frequency alternating magnetic field can be coupled to multiple secondary coils, generating induced voltages on the multiple secondary coils. When the connecting shaft 3 moves under the driving action of the driving member 1, the detection part on the connecting shaft 3 moves and affects the magnetic field coupling, thereby changing the induced voltage. When the detection part moves to different positions, the multiple secondary coils receive different induced voltages. By comparing the ratio of the induced voltages on the multiple secondary coils, the moving position of the detection part can be obtained, thereby realizing the detection device 4 to detect and control the steering position of the steering knuckle.

[0040] Furthermore, in another specific embodiment of the present invention, the detection device 4 is configured as an eddy current displacement sensor. Since eddy current sensors have advantages such as high reliability, high sensitivity, strong anti-interference ability, fast response speed, and immunity to media such as oil and water, configuring the detection device 4 as an eddy current displacement sensor improves the detection accuracy and working efficiency of the detection device 4, and extends its service life.

[0041] According to one embodiment of the present invention, the detection device 4 includes a housing and a cover plate. In this embodiment, the housing provides mounting positions for some other components of the detection device 4 and provides fixation, support, and protection for some other components of the detection device 4. A receiving cavity is formed inside the housing, which is suitable for accommodating some other components of the detection device 4; in this embodiment, the cover plate covers the housing and closes the receiving cavity, and a plurality of secondary coils are formed inside the cover plate, and the plurality of secondary coils are arranged in the extending direction of the cover plate. By setting up a housing and a cover plate, with the cover plate placed on the housing and sealing the cavity, and multiple secondary coils formed inside the cover plate and arranged in the extending direction of the cover plate, on the one hand, the cover plate and housing provide protection, thereby ensuring the normal operation of the multiple secondary coils and achieving good detection performance of the detection device 4; on the other hand, by setting up a housing and a cover plate, with the cover plate placed on the housing and sealing the cavity, and multiple secondary coils formed inside the cover plate and arranged in the extending direction of the cover plate, the multiple secondary coils, cover plate and housing are structurally compact, thereby saving the space occupied by the detection device 4 and facilitating the installation and arrangement of other components on the vehicle.

[0042] According to one embodiment of the present invention, the detection unit includes a positioning post 31 and a sensing plate 32. In this embodiment, the positioning post 31 can support and position the detection unit, and the positioning post 31 is disposed on the connecting shaft 3; in this embodiment, the sensing plate 32 is disposed on the positioning post 31 and moves with the positioning post 31. The sensing plate 32 is directly opposite the secondary coil in the thickness direction of the cover plate. When the sensing plate 32 moves together with the positioning post 31, the sensing plate 32 moves closer to or further away from the secondary coil along the thickness direction of the cover plate. By setting a positioning post 31 and an induction plate 32, and positioning the induction plate 32 and the secondary coil directly opposite each other in the thickness direction of the cover plate, when the driving member 1 drives the connecting shaft 3 to move, the connecting shaft 3 can drive the positioning post 31 to move together, and the positioning post 31 can drive the induction plate 32 to move together. Thus, the induction plate 32 can move closer to or further away from the secondary coil in the accommodating space along the thickness direction of the cover plate, so that different induced voltages are generated on multiple secondary coils respectively. This successfully realizes the accurate detection of the moving position of the connecting shaft 3 by the detection device 4. Finally, the detection device 4 can drive the moving stroke of the connecting shaft 3 according to the induced voltage.

[0043] Furthermore, in one specific embodiment of the present invention, the induction sheet 32 ​​is constructed as a metal part so that the induction sheet 32 ​​can conduct electricity and change the voltage of the secondary coil, thereby ensuring the normal operation of the induction sheet 32 ​​and the secondary coil.

[0044] In another specific embodiment of the present invention, the positioning post 31 is constructed as a bolt, and a threaded hole suitable for mating with the bolt is formed on the connecting shaft 3. The bolt is connected to the connecting shaft 3 through the threaded hole. Since bolts have advantages such as strong connection, good durability, convenient installation, and low cost, constructing the positioning post 31 as a bolt improves the connection reliability between the positioning post 31 and the connecting shaft 3, increases the convenience of installation and disassembly of the detection unit, and saves economic costs.

[0045] According to one embodiment of the present invention, the distance between the sensing plate 32 and the cover plate is d and satisfies: 0.3mm≤d≤1.1mm. Since multiple secondary coils are formed inside the cover plate, and the sensing plate 32 and the secondary coils are directly opposite each other in the thickness direction of the cover plate, by setting the distance between the sensing plate 32 and the cover plate within the above-mentioned range, a suitable distance can be maintained between the sensing plate 32 and the multiple secondary coils. Thus, when the sensing plate 32 moves together with the positioning post 31 and the connecting shaft 3, the moving distance of the sensing plate 32 relative to the multiple secondary coils is reasonable, and the multiple secondary coils can generate the corresponding induced voltage in a timely and accurate manner. This optimizes the detection reliability and accuracy of the detection device 4 and effectively improves the working performance of the steering system.

[0046] According to one embodiment of the present invention, the detection unit further includes a support block 33. In this embodiment, the support block 33 is sleeved on the outer periphery of the positioning post 31, and a support surface is formed at one end of the support block 33 facing the cover plate. The sensing sheet 32 ​​is disposed on the support block 33 and is attached to the support surface. The support block 33 can move with the positioning post 31 to a certain extent, and drive the sensing sheet 32 ​​to move together. By setting a support block 33, which is fitted around the outer periphery of the positioning post 31, and placing the sensing element 32 on the support block 33 and making it fit against the support surface, the support block 33 can support and protect the sensing element 32 and the positioning post 31, thereby improving the working reliability of the detection unit and extending the service life of the sensing element 32 and the positioning post 31. On the other hand, by setting a support block 33, which is fitted around the outer periphery of the positioning post 31, and placing the sensing element 32 on the support block 33 and making it fit against the support surface, the support block 33 can separate the sensing element 32 from the positioning post 31, thereby protecting the sensing element 32 from interference by the positioning post 31, and thus improving the accuracy of the detection results of the detection unit and the detection device 4.

[0047] Furthermore, in one specific embodiment of the present invention, the two ends of the extending direction of the sensing element 32 are formed with legs extending toward the direction close to the connecting shaft 3, and the outer periphery of the end of the support block 33 facing the cover plate is formed with a snap-fit ​​groove suitable for engaging with the legs. By providing the legs and the snap-fit ​​groove, the sensing element 32 and the support block 33 can be fixedly connected or disassembled through the snap-fit ​​engagement of the legs and the snap-fit ​​groove, thereby helping to improve the assembly efficiency of the detection unit and increasing the maintenance convenience of the sensing element 32 and the support block 33.

[0048] According to one embodiment of the present invention, a buffer member 34 is provided between the support block 33 and the positioning post 31. Since the support block 33 is sleeved on the outer periphery of the positioning post 31, at least a portion of the buffer member 34 is in contact with at least a portion of the outer periphery of the positioning post 31, and at least another portion of the buffer member 34 is in contact with at least a portion of the inner wall of the support block 33. By providing the buffer member 34, it can provide shock absorption and cushioning for the support post and the positioning post 31, thereby improving the impact resistance of the support post and the positioning post 31, ensuring the reliable operation of the steering system, and thus improving the driving safety of the vehicle. In addition, the buffer member 34 can also increase the friction between the support block 33 and the positioning post 31, thereby improving the connection strength between the support block 33 and the positioning post 31, further enhancing the operational reliability of the steering system.

[0049] Furthermore, in one specific embodiment of the present invention, the buffer 34 is constructed as a rubber component. Rubber components have the advantages of high elasticity, good wear resistance, good high temperature resistance, and low cost, thereby helping to extend the life of the buffer 34 and save economic costs.

[0050] According to one embodiment of the present invention, the transmission assembly includes a first pulley 21, a second pulley 22, and a screw 24. In this embodiment, the first pulley 21 is connected to the power output end, and the driving member 1 can drive the first pulley 21 to rotate. In this embodiment, the second pulley 22 is linked with the first pulley 21, and when the first pulley 21 rotates, the second pulley 22 can rotate. A first transmission thread is formed inside the second pulley 22. In this embodiment, a second transmission thread is provided on the outer periphery of the screw 24, and the second transmission thread meshes with the first transmission thread inside the second pulley 22. The screw 24 is connected to the connecting shaft 3. When the second pulley 22 rotates, the engagement of the first transmission thread and the second transmission thread can drive the screw 24 to move, and the movement of the screw 24 can drive the connecting shaft 3 to move. Because pulleys have advantages such as high transmission accuracy, good motion stability, and good vibration reduction performance, by setting a first pulley 21, a second pulley 22, and a screw 24, the first pulley 21 is connected to the power output end, the second pulley 22 is linked to the first pulley 21, and the outer circumference of the screw 24 is provided with a second transmission thread that meshes with the first transmission thread. This allows the first pulley 21, the second pulley 22, and the screw 24 to work together to transmit the power of the drive component 1 to the connecting shaft 3. This enables the drive component 1 to drive the connecting shaft 3 and drive the steering knuckle to turn, ensuring that the steering system has good steering performance and improving the vehicle's steering stability and accuracy.

[0051] Furthermore, in a specific embodiment of the present invention, the transmission assembly further includes a timing belt 23 and a nut 25. The timing belt 23 is connected to the first pulley 21 and the second pulley 22 respectively, so that when the first pulley 21 rotates, the timing belt 23 can synchronously drive the second pulley 22 to rotate, thereby achieving a good linkage effect between the second pulley 22 and the first pulley 21; the nut 25 is disposed on the second pulley 22, and a first transmission thread is formed in the nut 25. The rotation of the second pulley 22 can drive the nut 25 to rotate, and the rotation of the nut 25 can drive the screw 24 to move. In this embodiment, the specific process of the power transmission from the driving component 1 to the connecting shaft 3 is as follows: driving component 1 → power output end → first pulley 21 → timing belt 23 → second pulley 22 → nut 25 → first transmission thread → second transmission thread → screw 24 → connecting shaft 3. Finally, the connecting shaft 3 drives the steering knuckle to turn, realizing the steering function of the steering system.

[0052] According to one embodiment of the present invention, the travel distance of the connecting shaft 3 is l and satisfies: 58mm ≤ l ≤ 62mm. By setting the travel distance of the connecting shaft 3 within the above range, the travel distance of the connecting shaft 3 is matched with the distance between the sensing plate 32 and the cover plate. When the sensing plate 32 moves together with the connecting shaft 3, the travel distance of the sensing plate 32 relative to the multiple secondary coils is reasonable. The multiple secondary coils can generate the corresponding induced voltage in a timely and accurate manner, thereby optimizing the detection reliability and accuracy of the detection device 4. The steering system can meet the control accuracy requirements when the steering knuckle steering angle is large, effectively expanding the steering knuckle steering angle range, thereby improving the vehicle steering stability and effectively improving the vehicle's maneuverability.

[0053] Furthermore, in one specific embodiment of the present invention, the travel distance l of the connecting shaft 3 satisfies: 13mm≤l≤17mm; in another specific embodiment of the present invention, the travel distance l of the connecting shaft 3 satisfies: 18mm≤l≤22mm, so that the steering system can meet the needs of different types of vehicles for different steering knuckle steering angle ranges, thereby improving the adaptability of the steering system to different types of vehicles and helping to optimize the economic benefits of the steering system.

[0054] The control method for a steering system according to the present invention is briefly described below.

[0055] The control method for a steering system in this invention may include the following steps:

[0056] S1. Obtain the first position signal of the drive component 1 driving the connecting shaft 3 to move, and obtain the second position signal of the connecting shaft 3 moved by the detection device 4 through the sensing sheet 32.

[0057] S2. Determine whether the steering system meets the driving conditions based on the first position signal and the second position signal.

[0058] The control method for the steering system in this invention calibrates the first position signal obtained by the drive component 1 driving the connecting shaft 3 to move with the second position signal of the connecting shaft 3 detected by the detection device 4. This allows the steering system to perform different controls on the vehicle based on the calibration result. When the calibration result of the first and second position signals is within a preset acceptable range, the control method determines that the steering system meets the driving conditions, and the steering system can control the vehicle to operate normally. When the calibration result of the first and second position signals exceeds the preset acceptable range, the control method determines that the steering system does not meet the driving conditions, triggers a vehicle alarm, and takes further measures according to the safety level requirements. The control method for the steering system in this invention improves the control accuracy and safety of the steering system, further optimizes the vehicle's performance, and further ensures vehicle driving safety.

[0059] Furthermore, in a specific embodiment of the present invention, a position sensor is provided on the driving component 1. The position sensor can detect the position of the first pulley 21 driven by the driving component 1 and convert the detection result into an output signal. The output signal can be calculated to obtain a first position signal, thereby realizing the acquisition of the first position signal of the driving component 1 driving the connecting shaft 3 to move.

[0060] In another specific embodiment of the present invention, the number of teeth of the first pulley 21 is Z1, the number of teeth of the second pulley 22 is Z2, the lead of the nut 25 and the screw 24 is p, and the number of lines of the nut 25 and the screw 24 is x. When the driving member 1 drives the first pulley 21 to rotate relative to the zero position by an angle of θ through the power output end, the second pulley 22 rotates by an angle of θ*Z1 / Z2 under the drive of the synchronous belt 23. The rotation of the second pulley 22 drives the nut 25 to rotate, and the rotation of the nut 25 drives the screw 24 to move. Thus, the moving distance of the screw 24 at this time can be obtained as θ*Z1*p*x / 2π*Z2. This realizes that after the position sensor converts the detection result into an output signal, the output signal can be calculated to obtain the first position signal.

[0061] The vehicle according to the present invention is briefly described below.

[0062] The vehicle according to the present invention includes a front-wheel steering system and a rear-wheel steering system, which control the front and rear wheel steering of the vehicle, respectively. At least one of the front-wheel steering system and the rear-wheel steering system is configured as a steering system as described in any of the above embodiments. Since at least one of the front-wheel steering system and the rear-wheel steering system in the vehicle is configured as a steering system as described in any of the above embodiments, the steering system of the vehicle is equipped with multiple secondary coils that cooperate with the induction plate 32 to enable the detection device 4 to drive the movement of the connecting shaft 3 according to the induced voltage of the multiple secondary coils. This effectively improves the detection device 4's resistance to interference from external magnetic fields, enhances the steering system's control accuracy when the steering knuckle angle is large, and increases the steering knuckle angle range, thereby improving the vehicle's steering smoothness, accuracy, and driving safety, resulting in a better user experience.

[0063] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0064] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0065] In the description of this invention, "a plurality of" means two or more.

[0066] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0067] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A steering system for a vehicle, characterized by, include: A driving component, wherein a power output end is provided on the driving component; A transmission assembly, wherein the input end of the transmission assembly is connected to the power output end; A connecting shaft is connected to the steering knuckle of the vehicle. The connecting shaft is linked to the output end of the transmission assembly and is adapted to drive the steering knuckle to turn under the drive of the driving member. A detection part is formed on the connecting shaft. A detection device is provided, wherein the detection device forms a receiving space suitable for accommodating the detection part, the detection device generates an alternating magnetic field in the receiving space, a plurality of secondary coils are provided in the receiving space, a primary coil oscillator is also provided in the receiving space, the detection part moves in the receiving space and generates an induced voltage in the plurality of secondary coils, and the detection device drives the movement stroke of the connecting shaft according to the induced voltage. The detection device includes: A housing having a receiving cavity formed within it; A cover plate is provided on the housing and closes the receiving cavity. A plurality of secondary coils are formed inside the cover plate and are arranged in the extending direction of the cover plate. The detection unit includes: A positioning post, wherein the positioning post is disposed on the connecting shaft; A sensing element is disposed on the positioning post and moves with the positioning post. The sensing element and the secondary coil are directly opposite each other in the thickness direction of the cover plate. The transmission assembly includes: A first pulley is connected to the power output end; The second pulley is linked to the first pulley, and a first transmission thread is formed inside the second pulley; A screw, the outer circumference of which is provided with a second transmission thread that meshes with the first transmission thread, and the screw is connected to the connecting shaft.

2. The steering system for a vehicle according to claim 1, characterized by, The distance between the sensing element and the cover plate is d and satisfies: 0.3mm≤d≤1.1mm.

3. The steering system for a vehicle according to claim 1, characterized by, The detection unit also includes: A support block is sleeved on the outer periphery of the positioning post. A support surface is formed at one end of the support block facing the cover plate. The sensing sheet is disposed on the support block and is fitted to the support surface.

4. The steering system for a vehicle according to claim 3, characterized by, A buffer is provided between the support block and the positioning post.

5. The steering system for a vehicle according to claim 1, characterized by, The travel distance of the connecting shaft is l and satisfies: 58mm≤l≤62mm.

6. A control method for the steering system according to any one of claims 1 to 5, characterized in that, include: S1. Obtain a first position signal of the drive component driving the connecting shaft to move, and obtain a second position signal of the connecting shaft movement detected by the detection device; S2. Determine whether the steering system meets the driving conditions based on the first position signal and the second position signal.

7. A vehicle characterized by comprising: include: A front-wheel steering system and a rear-wheel steering system, wherein at least one of the front-wheel steering system and the rear-wheel steering system is configured as the steering system according to any one of claims 1-5.

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