Steering system and vehicle

Abstract

The embodiment of the utility model discloses a steering system and a vehicle, the steering system comprises a steering shaft and a damping assembly, and the damping assembly comprises a base, a driven part, a clamping part and a power part; the driven part is rotationally connected with the base and is provided with a first position and a second position relative to the base; the clamping piece is located on the peripheral side of the steering shaft and provided with a sliding end and an eccentric end which are oppositely arranged, the sliding end is slidably connected with the base in the radial direction of the steering shaft, the eccentric end is eccentrically and rotationally connected with the driven piece, a gap is formed between the eccentric end and the steering shaft when the driven piece is located at the first position, and the eccentric end abuts against the steering shaft when the driven piece is located at the second position; the power piece is installed on the base and can drive the driven piece to rotate to the second position relative to the first position of the base. According to the steering system, after the hand feeling simulation device fails, the steering system can still have a good feedback effect on a driver when the driver rotates the steering wheel.

Description

Technical Field

[0001] This application relates to the technical field of vehicle steering, and particularly to a steering system and a vehicle. Background Art

[0002] With the accelerating trend of automotive intelligence and electrification, the steer-by-wire system has emerged. The steer-by-wire system cancels the direct physical connection between the steering wheel and the wheels, and instead uses a combination of sensors, electronic controllers, and actuating motors. The driver's steering intention is captured by high-precision sensors, converted into electrical signals, and after being processed by the electronic control unit, the command is sent to the actuating motor at the wheels to drive the wheels to steer according to the command.

[0003] Since the steer-by-wire system cancels the mechanical connection between the steering column and the steering actuator and uses electrical signals to transmit the driver's command to the actuator, compared with the traditional steering system, the friction between various mechanical components is greatly reduced, and the load on the steering shaft is reduced. Therefore, in order to improve the phenomenon that the driver's hand feeling becomes lighter due to the reduced friction, the steer-by-wire system uses a hand feeling simulation system to apply a force to the steering shaft so that the driver can feel an obvious resistance when turning the steering wheel, achieving characteristics similar to those of the traditional steering system and ensuring that the hand feeling transmitted to the driver is natural and consistent. However, due to the working characteristics of the steer-by-wire system, after a failure occurs in the hand feeling simulation system, it may happen that the hand feeling simulation system cannot generate a force on the steering shaft, resulting in a lighter hand feeling for the driver. Summary of the Utility Model

[0004] An embodiment of this application provides a steering system and a vehicle. After the hand feeling simulation device fails, the steering system can still have a good feedback effect on the driver when the driver turns the steering wheel.

[0005] The steering system includes a steering shaft, a hand feeling simulation system, and a damping assembly. The hand feeling simulation system is connected to the steering shaft and is configured to energize the steering shaft to transmit a feedback torque to the steering shaft. The damping assembly includes a base, a driven member, a clamping member, and a power member. The driven member is rotatably connected to the base, and the driven member has a first position and a second position relative to the base. The clamping member is located on the circumference of the steering shaft, and the clamping member has a sliding end and an eccentric end arranged oppositely. The sliding end is slidably connected to the base along the radial direction of the steering shaft, and the eccentric end is eccentrically rotatably connected to the driven member. When the driven member is in the first position, there is a gap between the eccentric end and the steering shaft. When the driven member is in the second position, the eccentric end abuts against the steering shaft to replace at least part of the feedback torque. The power member is installed on the base, and the power member is used to drive the driven member to switch between the first position and the second position relative to the base.

[0006] Based on the steering system of the embodiments of the present application, during the process that the power member drives the driven member to rotate from the first position to the second position relative to the base, the sliding end slides relative to the base along the radial direction of the steering axis towards the steering axis, and the eccentric end rotates relative to the base along with the driven member, so that the eccentric end rotates relative to the driven member. Since the eccentric end is eccentrically rotatably connected to the driven member, as the rotation angle of the driven member relative to the base becomes larger and larger, the gap between the driven member and the eccentric end gradually decreases. Until the driven member rotates to the second position relative to the base, the driven member abuts against the circumferential side of the steering axis. At this time, a frictional force is generated between the steering axis and the driven member due to mutual extrusion. When the steering axis rotates relative to the driven member around its own axis, a frictional force between the steering axis and the driven member will provide a feel feedback for the driver when turning the steering wheel.

[0007] In some embodiments of the present application, the driven member includes a first main body portion, a second main body portion and a connecting portion. The first main body portion is rotatably connected to the base; the second main body portion is disposed opposite to the first main body portion, the clamping member is between the first main body portion and the second main body portion, and the clamping member is rotatably connected to the first main body portion and / or the second main body portion; one end of the connecting portion is connected to the first main body portion, and the other end is connected to the second main body portion.

[0008] Based on the above embodiments, the driven member is rotatably connected to the base through the first main body portion, rotatably connected to the driven member through the second main body portion and / or the first main body portion, and the clamping member is clamped between the first main body portion and the second main body portion to have a stronger connection strength between the clamping member and the first main body portion and / or the second main body portion, which can increase the external force that the clamping member can withstand, so that a greater frictional force can be generated between the clamping member and the steering axis; the connecting portion realizes the connection between the first main body portion and the second main body portion.

[0009] In some embodiments of the present application, the power member is configured as an electromagnetic relay, and the driven member further includes a magnetic force portion, and the magnetic force portion is connected to at least one of the first main body portion, the second main body portion and the connecting portion.

[0010] Based on the above embodiments, after the power member is configured as an electromagnetic relay, after the electromagnetic relay is powered on, the electromagnetic relay generates a magnetic field to apply an external force to the magnetic force portion, and then the driven member rotates relative to the base.

[0011] In some embodiments of the present application, the base includes a third main body portion and a sliding portion. The sliding portion protrudes from the surface of the third main body portion, and the sliding portion has a guiding groove. The sliding end is in the guiding groove and is slidably connected to the groove wall of the guiding groove.

[0012] Based on the above embodiment, a sliding groove is provided on the sliding part, and the sliding end is slidably connected with the groove wall of the sliding groove to realize the movement of the sliding end equivalent to the base.

[0013] In some embodiments of the present application, the base also includes a plurality of limiting portions, the limiting portions are connected to the third main body portion and / or the sliding portion, and there is a spacing between the limiting portions and the third main body portion, and the first main body portion is located in the gap between the third main body portion and the limiting portions.

[0014] Based on the above embodiment, the first main body is clamped in the gap between the limiting part and the third main body to achieve a rotational connection between the first main body and the base, and the multiple limiting parts can prevent the first main body from escaping from the gap between the limiting part and the third main body.

[0015] In some embodiments of the present application, the number of the sliding portion and the number of the clamping member are both plural, and the plurality of sliding portions and the clamping members are distributed at intervals along the circumference of the base.

[0016] Based on the above embodiment, there are multiple clamping members, and the multiple clamping members can generate greater friction between the steering shaft and provide customers with better feedback when the steering shaft rotates around its own axis.

[0017] In some embodiments of the present application, the first main body portion, the second main body portion, and the third main body portion are all provided with avoidance openings, and the steering shaft is passed through the avoidance openings.

[0018] Based on the above embodiment, the steering shaft passes through the first main body, the second main body and the third main body, so that a plurality of clamping members spaced apart along the circumference of the base surround the circumference of the steering shaft.

[0019] In some embodiments of the present application, the steering system also includes a return member, one end of which is connected to the base, and the other end is connected to the first main body, the second main body and one of the connecting parts, and the return member has elastic potential energy when the follower is in the second position relative to the base.

[0020] Based on the above embodiment, when the follower is in the second position, the restoring member has elastic potential energy, and after the power member removes the external force applied to the follower, the power member rotates from the second position to the first position under the action of the restoring member.

[0021] In a second aspect, an embodiment of the present application provides a vehicle, the vehicle comprising the steering system as described above.

[0022] Based on the vehicle of the embodiment of the present application, since the vehicle has the above-mentioned steering system, the vehicle has good feedback when the driven member is in the second position.

[0023] In some embodiments of the present application, the vehicle further includes a detection module and a control module. The detection module is communicatively connected to the haptic simulation system, and the detection module is configured to detect the torque signal of the haptic simulation system; the control module is communicatively connected to the detection module, and the control module controls the power component according to the torque signal.

[0024] Based on the above embodiments, when the detection module detects the torque signal of the haptic simulation system of the vehicle and the torque of the haptic simulation system is 0, the control module sends a control signal to the power component, causing the power component to drive the driven component to rotate from the first position to the second position relative to the base, and further causing the clamping component to contact the steering shaft to simulate the feedback feeling to the driver when the steering wheel rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 It is an exploded structural schematic diagram of a steering system in an embodiment of the present application.

[0027] Reference numerals: 10, steering shaft; 21, base; 211, third main body portion; 212, sliding portion; 2121, sliding groove; 213, limiting portion; 22, driven component; 221, first main body portion; 222, second main body portion; 223, connecting portion; 224, magnetic portion; 23, clamping component; 231, sliding end; 232, eccentric end; 24, power component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] With the accelerating trend of automotive intelligence and electrification, the steer-by-wire system has emerged. The steer-by-wire system cancels the direct physical connection between the steering wheel and the wheels, and instead uses a combination of sensors, electronic controllers and actuating motors. The driver's steering intention is captured by high-precision sensors, converted into electrical signals, and after being processed by the electronic control unit, the command is sent to the actuating motor at the wheels to drive the wheels to steer according to the command.

[0030] Since the steer-by-wire system eliminates the mechanical connection between the steering column and the steering actuator and uses electrical signals to transmit the driver's commands to the actuator, the friction between mechanical components is significantly reduced compared to traditional steering systems, and the load on the steering shaft is decreased. Therefore, to address the issue of the driver feeling a lighter steering sensation due to reduced friction, the steer-by-wire system uses a haptic simulation system to apply a force to the steering shaft, enabling the driver to feel a distinct resistance when turning the steering wheel and achieving characteristics similar to those of traditional steering systems, ensuring a natural and consistent steering feel for the driver. However, due to the operating characteristics of the steer-by-wire system, if the haptic simulation system malfunctions, it may be unable to generate a force on the steering shaft, resulting in a lighter steering feel for the driver.

[0031] To solve the above technical problems, please refer to Figure 1 As shown, the steering system includes a steering shaft 10, a haptic simulation system, and a damping assembly. The haptic simulation system is connected to the steering shaft 10 and is configured to energize the steering shaft 10 to transmit a feedback torque thereto. The damping assembly includes a base 21, a follower 22, a clamping member 23, and a power member 24. The follower 22 is rotatably connected to the base 21 and has a first position and a second position relative to the base 21. The clamping member 23 is located on the circumference of the steering shaft 10 and has a sliding end 231 and an eccentric end 232 disposed opposite to each other. The sliding end 231 is slidably connected to the base 21 along the radial direction of the steering shaft 10, and the eccentric end 232 is eccentrically rotatably connected to the follower 22. When the follower 22 is in the first position, there is a gap between the eccentric end 232 and the steering shaft 10. When the follower 22 is in the second position, the eccentric end 232 abuts against the steering shaft 10 to replace at least part of the feedback torque. The power member 24 is mounted on the base 21 and is used to drive the follower 22 to switch between the first position and the second position relative to the base 21.

[0032] It can be understood that the steering system in the embodiment of the present application further includes a steering wheel, which is coaxially and fixedly connected to the steering shaft 10. The driver drives the steering shaft 10 to rotate around its own axis by turning the steering wheel.

[0033] Please refer to Figure 1 As shown, the eccentric end 232 of the clamping member 23 can be configured as a circle, and the circular eccentric end 232 is eccentrically rotatably connected to the follower 22. Additionally, to increase the contact area between the clamping member 23 and the steering shaft 10, in some embodiments of the present application, a part of the eccentric end 232 can be configured as an elastic structure. In this case, when the follower 22 is in the second position, the elastic structure contacts the steering shaft 10, and at this time, the elastic structure deforms to provide a larger contact area between the elastic eccentric end 232 and the steering shaft 10.

[0034] Based on the steering system of the embodiments of the present application, it can be understood that when the feel simulation system is in the working state, the power member 24 is disabled and the clamping member 23 is in the first position; when the feel simulation system is in the failure state, the power member 24 energizes the clamping member 23 to switch the clamping member 23 from the first position to the second position; during the process that the power member 24 drives the driven member 22 to rotate from the first position to the second position relative to the base 21, the sliding end 231 slides relative to the base 21 along the radial direction of the steering shaft 10 towards the steering shaft 10, and the eccentric end 232 rotates relative to the base 21 along with the driven member 22, so that the eccentric end 232 rotates relative to the driven member 22 and the sliding end 231 slides relative to the base 21. Since the eccentric end 232 is eccentrically rotatably connected to the driven member 22, as the rotation angle of the driven member 22 relative to the base 21 becomes larger and larger, the gap between the driven member 22 and the eccentric end 232 gradually decreases. Until the driven member 22 rotates to the second position relative to the base 21, the driven member 22 abuts against the circumferential side of the steering shaft 10. At this time, a frictional force is generated between the steering shaft 10 and the driven member 22 due to mutual extrusion, and the steering shaft 10 will be subjected to a feedback torque due to the frictional force with the driven member 22 when rotating relative to the driven member 22 around its own axis.

[0035] Please refer to Figure 1 As shown, in some embodiments of the present application, the driven member 22 includes a first main body portion 221, a second main body portion 222 and a connecting portion 223. The first main body portion 221 is rotatably connected to the base 21; the second main body portion 222 is disposed opposite to the first main body portion 221, and the eccentric end 232 is located between the first main body portion 221 and the second main body portion 222, and the eccentric end 232 is rotatably connected to the first main body portion 221 and / or the second main body portion 222; one end of the connecting portion 223 is connected to the first main body portion 221, and the other end is connected to the second main body portion 222.

[0036] In some embodiments of the present application, a first rotating shaft is provided on the side of the eccentric end 232 close to the first main body portion 221. The first main body portion 221 has a first connection hole corresponding to the first rotating shaft. The first rotating shaft is located in the first connection hole and is rotatably connected to the hole wall of the first connection hole; a second rotating shaft is provided on the side of the eccentric end 232 close to the second main body portion 222. The second main body portion 222 has a second connection hole corresponding to the second rotating shaft. The second rotating shaft is located in the second connection hole and is rotatably connected to the hole wall of the second connection hole. The first rotating shaft and the second rotating shaft are coaxially arranged.

[0037] The follower 22 is rotationally connected to the base 21 through the first main body portion 221, and is rotationally connected to the clamping member 23 through the second main body portion 222 and / or the first main body portion 221. The clamping member 23 is clamped between the first main body portion 221 and the second main body portion 222, so that there is a stronger connection strength between the clamping member 23 and the first main body portion 221 and / or the second main body portion 222, which can increase the external force that the clamping member 23 can withstand, and enable a greater frictional force to be generated between the clamping member 23 and the steering shaft 10. The connecting portion 223 realizes the connection between the first main body portion 221 and the second main body portion 222.

[0038] In some embodiments of the present application, the power member 24 is configured as an electromagnetic relay. The follower 22 further includes a magnetic force portion 224, and the magnetic force portion 224 is connected to at least one of the first main body portion 221, the second main body portion 222, and the connecting portion 223. Thus, after the power member 24 is configured as an electromagnetic relay, after the electromagnetic relay is powered on, the electromagnetic relay generates a magnetic field to apply an external force to the magnetic force portion 224, and then the follower 22 rotates relative to the base 21. It can be understood that the electromagnetic relay can generate an attractive force or a repulsive force on the magnetic force portion 224 after being powered on.

[0039] In some other embodiments of the present application, the power member 24 can be configured as a motor. A first gear is connected to the output shaft of the motor, and the first main body portion 221 can be configured as a second gear, and the first gear and the second gear mesh with each other.

[0040] Please refer to Figure 1 As shown, in some embodiments of the present application, the base 21 includes a third main body portion 211 and a sliding portion 212. The sliding portion 212 protrudes from the surface of the third main body portion 211. The sliding portion 212 has a guiding groove, and the sliding end 231 is located in the guiding groove and is slidably connected to the groove wall of the guiding groove. A sliding groove 2121 is provided on the sliding portion 212, and the sliding end 231 is slidably connected to the groove wall of the sliding groove 2121 to realize the movement of the sliding end relative to the base 21.

[0041] The sliding portion 212 is used to provide the sliding groove 2121. It can be understood that the sliding portion 212 protrudes from the side of the third main body portion 211 close to the follower 22. In some embodiments of the present application, the sliding groove 2121 can also be directly formed on the third main body portion 211.

[0042] Since the sliding end 231 not only needs to move radially along the base 21 in the sliding groove 2121, but also needs to rotate relative to the base 21, in some embodiments of the present application, the sliding end 231 is configured as circular, so that the sliding end 231 can be slidably connected to the groove wall of the sliding groove 2121 along the radial direction of the base 21 and can rotate relative to the groove wall of the sliding groove 2121.

[0043] In some embodiments of the present application, the base 21 further includes a plurality of limiting portions 213. The limiting portions 213 are connected to the third main body portion 211 and / or the sliding portion 212, and there is a gap between the limiting portion 213 and the third main body portion 211. The first main body portion 221 is located in the gap between the third main body portion 211 and the limiting portion 213.

[0044] The first main body portion 221 is clamped in the gap between the limiting portion 213 and the third main body portion 211, realizing the rotational connection between the first main body portion 221 and the base 21. The plurality of limiting portions 213 can prevent the first main body portion 221 from slipping out of the gap between the limiting portion 213 and the third main body portion 211. Since the first main body portion 221 rotates relative to the base 21, in some embodiments of the present application, the first main body portion 221 is configured to be circular.

[0045] Please refer to Figure 1 As shown, in some embodiments of the present application, the number of the sliding portions 212 and the clamping members 23 is multiple. The multiple sliding portions 212 and the clamping members 23 are circumferentially spaced apart along the base 21, and the multiple clamping members 23 are equally spaced apart along the circumference of the base 21.

[0046] The number of the clamping members 23 is multiple. The multiple clamping members 23 can generate greater friction with the steering shaft 10, providing a better feedback feeling for the customer when the steering shaft 10 rotates around its own axis.

[0047] Please refer to Figure 1 As shown, in some embodiments of the present application, the first main body portion 221, the second main body portion 222, and the third main body portion 211 are all provided with avoidance openings, and the steering shaft 10 passes through the avoidance openings. The steering shaft 10 passes through the first main body portion 221, the second main body portion 222, and the third main body portion 211, so that the multiple clamping members 23 circumferentially spaced apart along the base 21 can surround the circumference of the steering shaft 10.

[0048] In some embodiments of the present application, the steering system further includes a restoring member (not shown in the figure). One end of the restoring member is connected to the base 21, and the other end is connected to one of the first main body portion 221, the second main body portion 222, and the connecting portion 223. When the driven member 22 is in the second position relative to the base 21, the restoring member has elastic potential energy.

[0049] When the driven member 22 is in the second position, the restoring member has elastic potential energy. After the power member 24 cancels the external force applied to the driven member 22, the power member 24 rotates from the second position to the first position under the action of the restoring member. The restoring member in the embodiments of the present application can be configured as a spring. One end of the spring is connected to the third main body portion 211 of the base 21, and the other end is connected to the connecting portion 223.

[0050] In a second aspect, an embodiment of the present application provides a vehicle, which includes the steering system as described above.

[0051] Based on the vehicle of the embodiment of the present application, since the vehicle has the above-mentioned steering system, the vehicle has good feedback when the follower 22 is in the second position.

[0052] In some embodiments of the present application, the vehicle further includes a detection module and a control module. The detection module is communicatively connected to the feel simulation system, and the detection module is used to detect the torque signal of the feel simulation system; the control module is communicatively connected to the detection module, and the control module controls the power member 24 according to the torque signal.

[0053] When the detection module detects the torque signal of the feel simulation system of the vehicle and the torque of the feel simulation system is 0, the control module sends a control signal to the power member 24 to drive the follower 22 to rotate relative to the base 21 from the first position to the second position, so that the clamping member 23 contacts the steering shaft 10 to simulate the feedback feeling to the driver when the steering wheel rotates.

[0054] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0055] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A steering system, characterized in that: The steering system comprises: Steering shaft; A hand feeling simulation system, the hand feeling simulation system is connected to the steering shaft, and the hand feeling simulation system is configured to enable the steering shaft to transmit feedback torque to the steering shaft; as well as, A damping assembly, the damping assembly comprising a base, a follower, a clamping member and a power member; The follower is rotationally connected to the base, and the follower has a first position and a second position relative to the base; the clamping member is located on the peripheral side of the steering shaft, and the clamping member has a sliding end and an eccentric end that are arranged opposite to each other, the sliding end is slidingly connected to the base along the radial direction of the steering shaft, and the eccentric end is eccentrically rotationally connected to the follower, and when the follower is in the first position, there is a gap between the eccentric end and the steering shaft, and when the follower is in the second position, the eccentric end abuts against the steering shaft to replace at least part of the feedback torque; The power member is mounted on the base, and is used to drive the driven member to switch between the first position and the second position relative to the base.

2. The steering system according to claim 1, characterized in that The driven member comprises: a first main body portion, the first main body portion being rotatably connected to the base; a second main body, the second main body is arranged opposite to the first main body, the clamp is located between the first main body and the second main body, and the eccentric end is eccentrically rotatably connected to the first main body and / or the second main body; A connecting portion, one end of which is connected to the first main body portion, and the other end of which is connected to the second main body portion.

3. The steering system according to claim 2, characterized in that: The power element is configured as an electromagnetic relay, and the driven element further includes: A magnetic portion connected to at least one of the first main body portion, the second main body portion, and the connecting portion.

4. The steering system according to claim 2, characterized in that: The base comprises: a third main body portion; and The sliding part is protruding from the surface of the third main body part, and the sliding part has a guide groove. The sliding end is located in the guide groove and is slidably connected with the groove wall of the guide groove along the radial direction of the steering shaft.

5. The steering system according to claim 4, characterized in that The base also includes: A plurality of limiting parts are connected to the third main body and / or the sliding part, and there is a distance between the limiting parts and the third main body, and a partial edge of the first main body is located in the gap between the third main body and the limiting parts.

6. The steering system according to claim 4, characterized in that: The number of the sliding parts and the number of the clamping members are both multiple, and the multiple sliding parts and the clamping members are distributed at intervals along the circumference of the base.

7. The steering system according to claim 4, characterized in that: The first main body, the second main body and the third main body are all provided with avoidance openings, and the steering shaft is passed through a plurality of the avoidance openings.

8. The steering system according to claim 4, characterized in that: The steering system also includes a return member, one end of which is connected to the base, and the other end is connected to the first main body, the second main body and one of the connecting parts. When the follower is in a second position relative to the base, the return member has elastic potential energy.

9. A vehicle, characterized in that: The vehicle comprises a steering system as claimed in any one of claims 1-8.

10. The vehicle according to claim 9, characterized in that Also includes: A detection module, the detection module is in communication with the hand feeling simulation system, and the detection module is used to detect a torque signal of the hand feeling simulation system; A control module is communicatively connected with the detection module and the power component, and the control module controls the power component according to the torque signal.

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