Steering-by-wire column system and vehicle

Abstract

The utility model provides a steer-by-wire column system and a vehicle, the steer-by-wire column system comprises a multi-layer support, the multi-layer support comprises a first moving support and a second moving support, the first moving support is sleeved with the second moving support, the first moving support is provided with a plurality of modal pins and a plurality of first linear bearings, and the first linear bearings are arranged on the first moving support. The modal pin piece abuts against the second movable support, so that a gap is reserved between the first movable support and the second movable support, and balls of the first linear bearing are driven to be tightly attached to the second movable support. According to the utility model, a composite structure of rolling guiding and elastic damping in the multi-layer bracket can be realized by utilizing the modal pin pieces and the balls of the linear bearings, and the collaborative optimization of rigidity and damping is realized, so that the relative micro motion between the brackets is limited, and the stability of the relative motion between the brackets is improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a steer-by-wire column system and vehicle. Background Technology

[0002] The preload structure in a steer-by-wire column system is a design feature used to ensure the stability and accuracy of the system. By generating preload, it reduces vibrations caused by clearance, thereby improving driving experience and safety. The preload structure is a crucial component of the axially adjustable steer-by-wire column, reducing the clearance between the inner and outer columns to ensure a consistent frequency and stiffness during column movement, thus enhancing driving comfort and safety.

[0003] The preload structure of the steer-by-wire column system with adjustable axial length on existing vehicles uses a fixed clamping block composed of components such as screw plugs, disc springs, and pressure blocks to apply radial preload to the sliding column. However, this method consists of multiple parts, and the parts are made of alloy steel, which makes them heavy. This leads to plastic deformation after long-term cyclic loading, resulting in a gradual decrease in preload and a reduction in the overall modality. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a steer-by-wire column system and vehicle, which utilizes modal pins and linear bearing balls to realize a composite structure of rolling guidance and elastic damping within a multi-layer bracket, thereby achieving synergistic optimization of stiffness and damping, limiting the relative micro-movements between brackets and improving the stability of relative movement between brackets.

[0005] This utility model provides a steer-by-wire column system, including:

[0006] The multi-layer support includes a first movable support and a second movable support. The second movable support is sleeved on the first movable support. The first movable support is provided with a plurality of modal pins and a plurality of first linear bearings. The modal pins abut against the second movable support to leave a gap between the first movable support and the second movable support, so as to drive the balls of the first linear bearings to fit tightly against the second movable support.

[0007] In one embodiment, the first movable bracket includes a first main board portion on which the modal pin is disposed; the second movable bracket includes a second main board portion on which a plurality of first grooves are provided; the modal pin abuts against the first grooves to leave the gap between the first main board portion and the second main board portion.

[0008] In one embodiment, the second movable bracket includes a second side plate portion located on both sides of the second main plate portion, and a first slide rail is arranged on the second side plate portion; the first movable bracket includes a first side plate portion located on both sides of the first main plate portion, and the first side plate portion is movably disposed within the first slide rail.

[0009] In one embodiment, the first side plate is provided with a plurality of second grooves, the second grooves are used to lay the first linear bearing, the balls of the first linear bearing abut against the first slide rail, and the balls of the first linear bearing are tightly attached to the first slide rail based on the gap.

[0010] In one embodiment, the multi-layer support further includes a mounting bracket, which covers the second movable support.

[0011] In one embodiment, the mounting bracket includes a third main board portion, which has a plurality of third grooves, and the third grooves are provided with third linear bearings; the second main board portion is provided with a second slide rail, and the balls of the third linear bearings abut against the second slide rail.

[0012] In one embodiment, the second side plate is provided with a plurality of fourth grooves, and the fourth grooves are provided with second linear bearings; the mounting bracket includes a third side plate, which is located on both sides of the third main plate, and the third side plate is provided with a third slide rail, and the balls of the second linear bearing abut against the third slide rail.

[0013] In one embodiment, the modal pin is disposed adjacent to the first linear bearing.

[0014] In one embodiment, the surface of the first groove is coated with a 50 μm thick PTFE layer.

[0015] In one embodiment, the modal pin is made of POM material.

[0016] This utility model also provides a vehicle, which includes the above-described steer-by-wire column system.

[0017] This utility model provides a steer-by-wire column system and vehicle, which employs a multi-layer bracket system. The multi-layer bracket system includes a first movable bracket and a second movable bracket, with the second movable bracket fitted over the first movable bracket. The first movable bracket is equipped with multiple modal pins and multiple first linear bearings. The modal pins abut against the second movable bracket, leaving a gap between the first and second movable brackets to drive the balls of the first linear bearings to fit tightly against the second movable bracket. This application introduces modal pins into the multi-layer bracket system, which, together with the balls of the first linear bearings, achieve a composite structure of rolling guidance and elastic damping within the multi-layer bracket system. This achieves synergistic optimization of stiffness and damping, limits the relative micro-movements between the brackets, and realizes the goal of achieving synergistic optimization of stiffness and damping at a lower cost, thereby improving the stability of relative movement between the brackets. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional structural diagram of a multi-layer support provided in some embodiments of this application.

[0020] Figure 2 This is an exploded view of a multi-layer support structure provided in some embodiments of this application.

[0021] Figure 3 This is a top view of a multi-layer support structure provided for some embodiments of this application.

[0022] Figure 4 This is a schematic diagram of the structure of a second movable support provided in some embodiments of this application.

[0023] Figure 5 This is a schematic diagram of the installation structure of the control assembly provided in some embodiments of this application.

[0024] Figure 6 This is a schematic diagram of the structure of the steering column provided in some embodiments of this application.

[0025] Figure 7 This is a schematic diagram of the structure of a modal pin provided in some embodiments of this application.

[0026] Figure 8 This is a schematic diagram of the mounting structure of a linear bearing provided in some embodiments of this application.

[0027] Figure 9An exploded view of the mounting structure of a linear bearing provided in some embodiments of this application.

[0028] Figure 10 The diagram shows the structure of a linear bearing provided in some embodiments of this application.

[0029] Icon labels:

[0030] 100. Multi-layer bracket; 110. First movable bracket; 111. First main board section; 112. First side plate section; 113. First linear bearing; 120. Second movable bracket; 121. Second main board section; 122. Second side plate section; 123. Second linear bearing; 130. Mounting bracket; 131. Third main board section; 132. Third side plate section; 133. Mounting hole; 134. Third linear bearing; 140. Modal pin; 170. Plug; 180. Disc spring; 190. Bearing pressure block; 200. Tube column assembly; 300. Control assembly; 410. Telescopic motor; 420. First lead screw; 430. Second lead screw. Detailed Implementation

[0031] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0033] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, 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 utility model.

[0034] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar attributes, not to indicate or imply relative importance or a specific order.

[0035] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0036] This application provides a steer-by-wire column and a vehicle. The steer-by-wire column provided in this application is described below.

[0037] First Embodiment

[0038] Please refer to Figure 1 , Figure 1 This is a cross-sectional structural diagram of a multi-layer support provided in some embodiments of this application. Please refer to... Figure 2 , Figure 2 This is an exploded view of a multi-layer support structure provided for some embodiments of this application. Please refer to... Figure 3 , Figure 3 This is a top view of a multi-layer support structure provided for some embodiments of this application. Please refer to... Figure 4 , Figure 4 This is a schematic diagram of the structure of a second movable support provided in some embodiments of this application.

[0039] The steer-by-wire column system provided in this application includes: a multi-layer bracket 100, which includes a first movable bracket 110 and a second movable bracket 120. The second movable bracket 120 is sleeved on the first movable bracket 110. The first movable bracket 110 is provided with a plurality of modal pins 140 and a plurality of first linear bearings 113. The modal pins 140 abut against the second movable bracket 120 so that there is a gap between the first movable bracket 110 and the second movable bracket 120, so as to drive the balls of the first linear bearings 113 to fit tightly against the second movable bracket 120.

[0040] This application employs a modal pin 140 abutting against the second movable support 120, creating a gap between the first movable support 110 and the second movable support 120. Based on this gap, the balls of the first linear bearing 113 are driven to press tightly against the second movable support 120. This achieves a relatively stable gap between the first movable support 110 and the second movable support 120 using multiple modal pins 140, resulting in relatively stable force on the balls of the first linear bearing 113 between the first movable support 110 and the second movable support 120. By introducing modal pins 140 into the multi-layer support, a composite structure of rolling guidance and elastic damping is achieved using the modal pins 140 and the balls of the first linear bearing 113. This enables synergistic optimization of stiffness and damping, effectively limiting the relative micro-movements of the first movable support 110 and the second movable support 120 during relative movement.

[0041] Second Embodiment

[0042] Based on the first embodiment, the steer-by-wire column system provided by the present application includes: a multi-layer bracket 100, the multi-layer bracket 100 includes a first moving bracket 110 and a second moving bracket 120, and the second moving bracket 120 sleeves the first moving bracket 110. The first moving bracket 110 is movable relative to the second moving bracket 120, and the moving direction is the length direction of the second moving bracket 120.

[0043] Optionally, the first moving bracket 110 includes a first main board portion 111, and a modal pin 140 is arranged on the first main board portion 111; the second moving bracket 120 includes a second main board portion 121, and a plurality of first grooves corresponding to the modal pin 140 are provided on the second main board portion 121; the modal pin 140 abuts against the first groove, so that a gap is left between the first main board portion 111 and the second main board portion 121.

[0044] Optionally, the second moving bracket 120 includes second side board portions 122, the second side board portions 122 are arranged on both sides of the second main board portion 121, and first slide ways are arranged on the second side board portions 122, and the first slide ways extend along the length direction of the second moving bracket 120; the first moving bracket 110 includes first side board portions 112, the first side board portions 112 are arranged on both sides of the first main board portion 111, and the first side board portions 112 are movably arranged in the first slide ways. Exemplarily, the second main board portion 121 is arranged in the middle in the width direction of the second moving bracket 120, the first slide ways are arranged on the second side board portions 122 on both sides, and the ends of the first moving bracket 110 extend into the first slide ways, so that the first slide ways can support both ends of the first moving bracket 110, which is beneficial to reducing the assembly difficulty of the first moving bracket 110 and ensuring the reliability of movement.

[0045] Optionally, the first main board portion 111 and the first side board portions 112 form a first acute angle, the second main board portion 121 and the second side board portions 122 form a second acute angle, and the angles of the first acute angle and the second acute angle are the same, so as to ensure that the second moving bracket 120 stably sleeves the first moving bracket 110.

[0046] A plurality of second grooves are provided on the first side board portions 112, a first linear bearing 113 is laid in the second grooves, the balls of the first linear bearing 113 abut against the first slide way, and the balls of the first linear bearing 113 are closely attached to the first slide way based on the gap.

[0047] In one embodiment, a reinforcing rib is provided on the side of the first moving bracket 110 away from the second moving bracket 120, the reinforcing rib is composed of a plurality of "rice" - shaped images and extends along the length direction. Through the design of the reinforcing rib, it is beneficial to improve the mode of the first moving bracket 110, reduce the vibration of the steer-by-wire column, and improve the structural strength of the first moving bracket 110.

[0048] Third Embodiment

[0049] Based on the first and second embodiments, the steer-by-wire column system provided in this application includes a multi-layer bracket 100. The multi-layer bracket 100 includes a first movable bracket 110, a second movable bracket 120, and a mounting bracket 130, with the mounting bracket 130 sleeved on the second movable bracket 120.

[0050] Optionally, the mounting bracket 130 includes a third main board portion 131, which has a plurality of third grooves, and a third linear bearing 134 is installed in each of the third grooves; the second main board portion 121 is provided with a second slide rail, and the balls of the third linear bearing 134 abut against the second slide rail. Further, the third grooves are located on the side of the third main board portion 131 near the second movable bracket 120, and the second slide rail is located on the side of the second main board portion 121 away from the first movable bracket 110 and near the second movable bracket 120.

[0051] Optionally, the mounting bracket 130 includes a third side plate portion 132, which is disposed on both sides of the third main plate portion 131, and the third side plate portion 132 is provided with a third slide rail; the second side plate portion 122 is provided with a plurality of fourth grooves, and the fourth grooves are provided with second linear bearings 123, the balls of the second linear bearings 123 abutting against the third slide rails. Further, the third slide rail is located on the side near the second movable bracket 120, and the fourth grooves are located on the side of the second side plate portion 122 near the mounting bracket 130.

[0052] To further explain, after the balls of the third linear bearing 134 abut against the second slide rail, a gap is left between the mounting bracket and the second movable bracket 120, causing the balls of the second linear bearing 123 to press tightly against the third slide rail. To further explain, the second movable bracket 120 is movable relative to the mounting bracket 130, and the direction of movement is the length direction of the mounting bracket 130. For example, a third main plate portion 131 is provided in the middle of the width direction of the mounting bracket 130, and third side plate portions 132 are provided on both sides. Each of the third side plate portions 132 has a third slide rail. Both ends of the second movable bracket 120 extend into the third slide rail, so that the third slide rail can support both ends of the second movable bracket 120, thereby reducing the assembly difficulty of the second movable bracket 120 and ensuring the reliability of movement.

[0053] Optionally, the third main board portion 131 and the third side plate portion 132 form a third acute angle, and the angle of the third acute angle is the same as that of the second acute angle, so as to ensure that the mounting bracket 130 is fitted with the second movable bracket 120.

[0054] Optionally, the mounting bracket 130 has mounting holes 133 through which the mounting bracket 130 is fixed to the vehicle. Optionally, the mounting holes 133 are spaced apart. Exemplarily, the mounting holes 133 may be spaced apart along the length of the mounting bracket 130 or along the width of the mounting bracket 130. Fixing the steer-by-wire column to a preset position on the vehicle through the mounting holes 133 improves the reliability of the steer-by-wire column.

[0055] Fourth embodiment

[0056] Please refer to Figure 5 The present application provides schematic diagrams of the steer-by-wire column structure in some embodiments. Please refer to... Figure 6 , Figure 5 This is a schematic diagram of the installation structure of the control assembly provided in some embodiments of this application.

[0057] Based on the first to third embodiments, the steer-by-wire column system provided in this application includes:

[0058] The multi-layer support 100 includes a first movable support 110 and a second movable support 120.

[0059] The tubing assembly 200 is rotatably mounted on the first movable support 110;

[0060] The control assembly 300 is mounted on the second movable bracket 120. It drives the first movable bracket 110 and the second movable bracket 120 to move, thereby driving the column assembly 200 to extend and retract.

[0061] Optionally, the tubing assembly 200 is rotatably mounted on the first movable support 110, allowing the tubing assembly to rotate relative to the first movable support 110. The axial direction of the tubing assembly 200 is the same as the direction of movement of the first movable support 100.

[0062] Optionally, the control assembly 300 is detachably connected to the second movable bracket 120, and the detachable connection is achieved by means of fasteners, snap-fit, etc., thereby facilitating the replacement and maintenance of the control assembly. The mounting position of the control assembly 300 on the second movable bracket 120 is offset from the mounting hole 133 on the mounting bracket to improve the arrangement space for vehicle components such as the brake pedal and air conditioner.

[0063] Optionally, the output terminal of the control assembly 300 is connected to the column assembly 200, which is mounted on the first movable bracket. When the control assembly 300 drives the column assembly to move, it causes the first movable bracket 110 to move relative to the second movable bracket 120, and the second movable bracket 120 to move relative to the mounting bracket 130, thereby causing the column assembly 200 to extend or retract. The control assembly 300 drives the first movable bracket 110 and the second movable bracket 120 to move along the length direction, thereby causing the column assembly 200 to extend or retract.

[0064] In one embodiment, the control assembly 300 includes an angle adjustment motor that controls the rotation of the column assembly 200 relative to the first movable support 110.

[0065] In one embodiment, the control assembly 300 is located at one axial end of the column assembly 200 and is arranged along the axial direction of the column assembly 200, thereby reducing the space occupied by the steering column in the height direction.

[0066] In one embodiment, the steer-by-wire column further includes a communication interface, which is connected to the control assembly 300 and located on the side of the column assembly 200 away from the direction of movement of the first movable support 110. This reduces the layout space of the steer-by-wire column and facilitates the operator's connection to the communication interface, thereby improving the vehicle assembly efficiency.

[0067] The control assembly 300 includes a dual-screw telescopic motor mounted on a second movable bracket 120. The dual-screw telescopic motor includes a telescopic motor 410, a first screw 420, and a second screw 430. The first screw 420 is fixedly connected to the first movable bracket 110, the second screw 430 is fixedly connected to the mounting bracket 130, and the telescopic motor 410 is fixedly connected to the second movable bracket 120. The first screw 420 and the second screw 430 rotate simultaneously, providing double the stroke.

[0068] Fifth embodiment

[0069] Based on the first to third embodiments, please refer to Figure 7 , Figure 7 This is a schematic diagram of the structure of a modal pin provided in some embodiments of this application.

[0070] In one embodiment, the second movable support 120 is provided with a plurality of first grooves corresponding to the modal pins 140; when the first movable support 110 is assembled to the second movable support 120, the modal pins 140 abut against the first grooves.

[0071] Preferably, the modal pins 140 are arranged adjacent to the first linear bearings 150. Further, two first linear bearings 150 are respectively arranged on the first side plate portions 112 on both sides of the first movable support 110, and four modal pins 140 are arranged on the first main plate portion 111. This embodiment introduces four modal pins to form a composite structure of rolling guidance and elastic damping with the balls of the first linear bearings, limiting the relative micro-movements between the supports and improving the stability of the relative movement between the supports.

[0072] Optionally, the modal pin 140 is made of POM material. Further, the modal pin made of POM material forms an additional constraint between the first moving bracket 110 and the second moving bracket 120, suppressing relative displacement. Since the density of POM is much lower than that of metal, the negative impact of increased mass on high-frequency modes is avoided, thus achieving the goals of fewer parts, simpler assembly, and lower cost. The use of POM material achieves synergistic optimization of stiffness and damping, realizing this optimization at a lower cost; it also increases the stiffness of the steering column assembly. Because the modal pin 140 is made of POM material, its high toughness (elongation at break ≥40%) can absorb impact energy, avoiding fatigue cracks in the metal plate caused by stress concentration.

[0073] Optionally, a 50μm thick PTFE layer is coated on the surface of the first groove. Further, by coating the contact surface of the modal pin 140 with a 50μm thick PTFE layer, vibration energy is dissipated through friction, reducing the resonance amplitude. Because a 50μm thick PTFE layer is used on the surface of the first groove, and the PTFE layer has a friction coefficient of 0.05~0.1, its wear resistance is 10 times higher than that of pure steel, thus creating a self-lubricating interface and avoiding abrasive wear from direct metal-POM contact.

[0074] By incorporating modal pins into the multi-layer support structure, the rigidity of the entire multi-layer support 100 is enhanced, preventing the first movable support 110 and the second movable support 120 from sliding freely, thus strengthening the overall structural rigidity. By screwing modal pins 140 into the first movable support 110, the modal pins 140 abut against the second movable support 120, causing the balls of the first linear bearing 150 to press tightly against the second movable support 120. Adjusting the torque of screwing in the modal pins 140 changes the generated preload, ensuring the balls of the first linear bearing 150 remain firmly against the second movable support. This preload restricts the relative micro-movements between the first movable support 110 and the second movable support 120, thereby improving the overall bending stiffness (experimental data show a 35% increase in bending stiffness).

[0075] Sixth Embodiment

[0076] Based on the first to third embodiments, please refer to Figure 8 , Figure 8 This is a schematic diagram of the mounting structure of a linear bearing provided in some embodiments of this application. Please refer to... Figure 9 , Figure 9 This is an exploded view of the mounting structure of a linear bearing provided in some embodiments of this application. Please refer to... Figure 10 , Figure 10 The diagram shows the structure of a linear bearing provided in some embodiments of this application.

[0077] Optionally, the first movable bracket 110 includes a first side plate portion 112, on which a plurality of second grooves are provided, and the second grooves are used to house the first linear bearing 113; the second movable bracket 120 includes a second side plate portion 122, on which a second slide rail is arranged; the balls of the first linear bearing 113 abut against the second slide rail. Further, a first positioning hole is provided in the second groove, and at least two first positioning pins are provided on the first linear bearing 113. The first positioning pins are inserted into the first positioning hole to install the first linear bearing 113 in the second groove.

[0078] Optionally, the mounting bracket 130 includes a third main plate portion 131, which has multiple third grooves on it, and a third linear bearing 134 is laid in each of the third grooves. The second main plate portion 121 is provided with a second slide rail, and the balls of the third linear bearing 134 abut against the second slide rail. Further, a third positioning hole is provided in the third groove, and at least two third positioning pins are provided on the third linear bearing. The third positioning pins are inserted into the third positioning hole to mount the third linear bearing in the third groove.

[0079] Optionally, the mounting bracket 130 includes a third side plate portion 132, which is located on both sides of the third main plate portion 131. The third side plate portion 132 is provided with a third slide rail. The second side plate portion 122 is provided with a plurality of fourth grooves, and the fourth grooves are provided with second linear bearings 123, the balls of the second linear bearings 123 abutting against the third slide rails 132. Further, the fourth grooves are provided with second positioning holes, and the second linear bearings are provided with at least two second positioning pins. The second positioning pins are inserted into the second positioning holes to install the second linear bearings in the fourth grooves.

[0080] Optionally, the multi-layer bracket further includes: a bearing clamp 190, a disc spring 180, and a screw plug 170. When installing the first linear bearing 150 / second linear bearing 160, the first linear bearing 150 is inserted into the second groove, and after the first positioning pin is inserted into the first positioning hole, the bearing clamp, disc spring, and screw plug are then installed on the first positioning pin in sequence for fastening. The second linear bearing 160 is inserted into the third groove, and after the second positioning pin is inserted into the second positioning hole, the bearing clamp, disc spring, and screw plug are then installed on the second positioning pin in sequence for fastening.

[0081] This utility model also provides a vehicle including the above-described steer-by-wire column system.

[0082] This application utilizes the steer-by-wire column system provided in this embodiment, installed on a vehicle. The steer-by-wire column system includes a multi-layer bracket, comprising a first movable bracket and a second movable bracket. The second movable bracket is fitted over the first movable bracket. The first movable bracket is equipped with multiple modal pins and multiple first linear bearings. The modal pins abut against the second movable bracket, leaving a gap between them. This allows the balls of the first linear bearings to be tightly pressed against the second movable bracket. By introducing modal pins within the multi-layer bracket, a composite structure of rolling guidance and elastic damping is achieved with the balls of the first linear bearings. This results in synergistic optimization of stiffness and damping, limiting relative micro-movements between brackets, and achieving synergistic optimization of stiffness and damping at a lower cost. This improves the stability of relative movement between brackets and is suitable for industrial and precision equipment fields with stringent requirements for stroke, accuracy, and reliability. Any modifications, equivalent substitutions, and improvements made within the principles and rules of this invention should be included within the scope of protection of this invention.

[0083] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0084] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A steer-by-wire column system, characterized in that, include: The multi-layer support includes a first movable support and a second movable support. The second movable support is sleeved on the first movable support. The first movable support is provided with a plurality of modal pins and a plurality of first linear bearings. The modal pins abut against the second movable support to leave a gap between the first movable support and the second movable support, so as to drive the balls of the first linear bearings to fit tightly against the second movable support.

2. The steer-by-wire column system as described in claim 1, characterized in that, The first movable bracket includes a first main board portion, on which the modal pin is arranged; the second movable bracket includes a second main board portion, on which a plurality of first grooves are provided; the modal pin abuts against the first grooves to leave the gap between the first main board portion and the second main board portion.

3. The steer-by-wire column system as described in claim 2, characterized in that, The second movable bracket includes a second side plate portion, which is located on both sides of the second main plate portion, and the second side plate portion is provided with a first slide rail; the first movable bracket includes a first side plate portion, which is located on both sides of the first main plate portion, and the first side plate portion is movably disposed within the first slide rail.

4. The steer-by-wire column system as described in claim 3, characterized in that, The first side plate is provided with a plurality of second grooves, the second grooves are used to lay the first linear bearing, the balls of the first linear bearing abut against the first slide rail, and the balls of the first linear bearing are tightly attached to the first slide rail based on the gap.

5. The steer-by-wire column system as described in claim 3, characterized in that, The multi-layer support also includes a mounting bracket, which covers the second movable support.

6. The steer-by-wire column system as described in claim 5, characterized in that, The mounting bracket includes a third main board section, which has multiple third grooves and is provided with third linear bearings; the second main board section is provided with a second slide rail, and the balls of the third linear bearings abut against the second slide rail.

7. The steer-by-wire column system as described in claim 6, characterized in that, The mounting bracket includes a third side plate portion, which is disposed on both sides of the third main plate portion, and the third side plate portion is provided with a third slide rail; the second side plate portion is provided with a plurality of fourth grooves, and the fourth grooves are provided with second linear bearings, the balls of the second linear bearings abutting against the third slide rails.

8. The steer-by-wire column system as described in any one of claims 1-7, characterized in that, The modal pin is disposed adjacent to the first linear bearing.

9. The steer-by-wire column system as described in claim 2, characterized in that, The surface of the first groove is coated with a 50μm thick PTFE layer.

10. The steer-by-wire column system as described in any one of claims 1-7, characterized in that, The modal pin is made of POM material.

11. A vehicle, characterized in that, The vehicle includes a steer-by-wire column system as described in any one of claims 1-10.

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