Steering column, steering wheel assembly, and vehicle

Abstract

This disclosure provides a steering column, a steering wheel assembly, and a vehicle. The steering column includes: a first column, a second column, and a third column connected in a telescopic manner; a drive motor, which remains relatively fixed to the third column; an active mechanism, which is drive-connected to the drive motor; a first driven mechanism, which is drive-connected to the active mechanism and has a portion of its structure connected to the first column, so as to drive the first column to move axially relative to the second column; and a second driven mechanism, which is drive-connected to the active mechanism and has a portion of its structure connected to the second column, so as to drive the second column to move axially relative to the third column. When this steering column is applied to a vehicle, the steering wheel is connected to the first column so that it is retracted into the vehicle interior along with the first column. The first and second driven mechanisms do not need to bear additional loads, thus improving the durability of the steering column.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle technology, and more particularly to a steering column, steering wheel assembly, and vehicle. Background Technology

[0002] Currently, vehicle steering systems typically include a three-section steering column, comprising a first drive assembly and a second drive assembly. During autonomous driving, the first drive assembly is driven by a motor, which in turn drives the second drive assembly, enabling a large-travel, retractable steering wheel to significantly increase cabin space. However, the first drive assembly must simultaneously bear the loads of both the motor and the second drive assembly, resulting in a heavy load. With excessive use of the retractable function, the first drive assembly is prone to wear and tear, thus affecting the durability of the steering column. Summary of the Invention

[0003] To address the aforementioned technical problems, this disclosure provides a steering column, a steering wheel assembly, and a vehicle.

[0004] A first aspect of this disclosure provides a steering column, comprising: a first column, a second column, and a third column connected in a telescopic manner; a drive motor, which is relatively fixed to the third column; an active mechanism, which is drivenly connected to the drive motor; a first driven mechanism, which is drivenly connected to the active mechanism, and a portion of its structure is connected to the first column to drive the first column to move axially relative to the second column via the first driven mechanism; and a second driven mechanism, which is drivenly connected to the active mechanism, and a portion of its structure is connected to the second column to drive the second column to move axially relative to the third column via the second driven mechanism.

[0005] Optionally, the active mechanism includes an active rod and an active gear disposed on the active rod, the active rod being drivenly connected to the drive motor;

[0006] The first driven mechanism includes a first driven rod, a first driven gear and a conversion element disposed on the first driven rod. The conversion element is connected to the first tubular column. The first driven gear meshes with the driving gear. The driving rod drives the first driven rod to rotate through the meshing between the driving gear and the first driven gear. The conversion element converts the rotation of the first driven rod into the axial movement of the first tubular column.

[0007] Optionally, the first driven gear is provided with an internal thread, and the first driven rod meshes with the first driven gear for transmission;

[0008] The conversion component is a lead screw nut, which is sleeved on the first driven rod and threadedly connected to the first driven rod.

[0009] Optionally, a lead screw nut seat is connected to the first tubing column. The lead screw nut is disposed in the lead screw nut seat and is clearance-fitted with the lead screw nut seat. The lead screw nut is configured to rotate in the lead screw nut seat and move along the axial direction of the first driven rod under the drive of the first driven rod, so as to drive the lead screw nut seat and the first tubing column to move axially.

[0010] Optionally, the second driven mechanism includes a second driven rod and a second driven gear disposed on the second driven rod. The second driven gear meshes with the driving gear and is connected to the second tubular column. The second driven rod is connected to the third tubular column. The driving rod drives the second driven gear to move on the second driven rod through the meshing between the driving gear and the second driven gear, thereby driving the second tubular column to move axially.

[0011] Optionally, the driving rod is a splined shaft, the driving gear is provided with an internal spline, the splined shaft and the internal spline of the driving gear are engaged, and the driving gear can move along the axial direction of the splined shaft;

[0012] The second driven rod is a lead screw structure, and the second driven gear is provided with an internal thread. The second driven rod meshes with the second driven gear for transmission.

[0013] Optionally, a gearbox housing is connected to the second tubular column, and the driving gear, the first driven gear, and the second driven gear are all located inside the gearbox housing and can rotate inside the gearbox housing;

[0014] The second driven gear is clearance-fitted with the gearbox housing. The second driven gear is configured to rotate within the gearbox housing and move axially along the second driven rod under the drive of the driving gear, thereby driving the gearbox housing and the second tubular column to move axially.

[0015] Optionally, it also includes a reduction mechanism, which includes a worm gear and a turbine, the worm gear and the turbine are driven by an involute tooth profile, the worm gear is connected to the drive motor, and the worm gear is driven by the drive mechanism.

[0016] A second aspect of this disclosure provides a steering wheel assembly including the steering column described above.

[0017] A third aspect of this disclosure provides a vehicle including the steering wheel assembly described above.

[0018] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0019] The steering column, steering wheel assembly, and vehicle disclosed herein include a steering column comprising a first column, a second column, and a third column, which are telescopically connected in sequence; a drive motor; an active mechanism; a first driven mechanism; and a second driven mechanism. The drive motor is relatively fixed to the third column. A portion of the first driven mechanism is connected to the first column, and a portion of the second driven mechanism is connected to the second column. Both the first and second driven mechanisms are respectively connected to the active mechanism for transmission. When the steering column is applied to a vehicle, the first column is connected to the vehicle's steering wheel, and the third column is fixedly connected to the vehicle's internal structure. During autonomous driving, the drive motor can drive the active mechanism to transmit power to the first and second driven mechanisms, thereby driving the first driven mechanism... The first steering column moves axially relative to the second steering column, and the second driven mechanism drives the second steering column to move axially relative to the third steering column, so as to axially retract the first and second steering columns into the third steering column. This allows the steering wheel to be retracted into the vehicle along with the first steering column, realizing the large-travel extension and retraction function of the steering wheel when the vehicle is in autonomous driving mode. In the process of realizing this function, under the drive of the drive motor, the active mechanism can respectively drive the first and second driven mechanisms, so that the first and second driven mechanisms do not need to bear any additional loads other than the load of the drive motor. This avoids the problem of the first and second driven mechanisms bearing large loads, resulting in severe wear, and improves the durability of the steering column. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the steering column structure in one embodiment of the present disclosure;

[0023] Figure 2 This is a partial structural schematic diagram of the steering column in one embodiment of the present disclosure.

[0024] Figure label:

[0025] 1. First tubing column; 2. Second tubing column; 3. Third tubing column; 4. Drive motor; 5. Active mechanism; 51. Active rod; 52. Active gear; 6. First driven mechanism; 61. First driven rod; 62. First driven gear; 63. Converter; 64. Lead screw nut seat; 7. Second driven mechanism; 71. Second driven rod; 72. Second driven gear; 73. Gearbox housing; 8. Reduction mechanism. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0027] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0028] Currently, the standard requirement for steering column adjustments in vehicles is a durability of 20,000 cycles, with some OEMs even requiring 50,000 cycles. The driven gear of the first transmission component needs to bear the load of both the motor and the second transmission component, thus bearing a large load and experiencing numerous adjustments. This makes it most prone to wear and tear issues, which in turn affect the durability of the steering column.

[0029] Reference Figures 1 to 2 As shown, some embodiments of this disclosure provide a steering column, including a first column 1, a second column 2 and a third column 3 connected in a telescopic manner, a drive motor 4, an active mechanism 5, a first driven mechanism 6 and a second driven mechanism 7.

[0030] Specifically, the second tubing 2 is fitted outside the first tubing 1. The first tubing 1 can be retracted axially into the second tubing 2 or extended axially from the second tubing 2. The third tubing 3 is fitted outside the second tubing 2. The second tubing 2 can be retracted axially into the third tubing 3 or extended axially from the third tubing 3, forming a three-section steering tubing. The first tubing 1, the second tubing 2, and the third tubing 3 can be made of metal tubing, such as steel. The inner diameter of the third tubing 3 is larger than the outer diameter of the second tubing 2, and the inner diameter of the second tubing 2 is larger than the outer diameter of the first tubing 1.

[0031] The steering column is described in detail below using a specific embodiment applied to a vehicle. The first column 1 is connected to the vehicle's steering wheel, and the third column 3 is connected to the vehicle's steering system. The drive motor 4 remains relatively fixed to the third column 3. The driving mechanism 5 is driven by the drive motor 4. The first driven mechanism 6 is driven by the driving mechanism 5, and a portion of its structure is connected to the first column 1, so as to drive the first column 1 to move axially relative to the second column 2. The second driven mechanism 7 is driven by the driving mechanism 5, and a portion of its structure is connected to the second column 2, so as to drive the second column 2 to move axially relative to the third column 3.

[0032] The steering column disclosed herein includes a first column 1, a second column 2, and a third column 3, which are telescopically connected in sequence; a drive motor 4; an active mechanism 5; a first driven mechanism 6; and a second driven mechanism 7. When this steering column is applied to a vehicle, the first column 1 is connected to the vehicle's steering wheel, and the third column 3 is fixedly connected to the vehicle's internal structure. During autonomous driving, the drive motor 4 can drive the active mechanism 5 to transmit power to the first driven mechanism 6 and the second driven mechanism 7. This allows the first driven mechanism 6 to move the first column 1 axially relative to the second column 2, and the second driven mechanism 7 to move the second column 2 axially relative to the third column 3. The steering column 3 moves axially to axially retract the first column 1 and the second column 2 into the third column 3, allowing the steering wheel to be retracted into the vehicle along with the first column 1. This enables the steering wheel to retract and retract significantly during autonomous driving. During this process, driven by the drive motor 4, the active mechanism 5 transmits power to the first driven mechanism 6 and the second driven mechanism 7. This ensures that the first and second driven mechanisms 6 and 7 bear only the load of the drive motor 4, without bearing any additional load. This avoids excessive load leading to severe wear and improves the durability of the steering column. Since the load on the first and second driven mechanisms 6 and 7 is relatively small, the noise generated during their retraction and retraction is reduced to some extent.

[0033] In traditional steering columns, during extension and retraction adjustments, the motor and its wiring harness move along with the first transmission component. This causes the wiring harness to be constantly stretched and compressed, making it prone to getting stuck with surrounding parts or experiencing wear. When the wiring harness wears severely and breaks, the steering column loses its steering and extension / retraction adjustment functions. In this disclosure, the drive motor 4 remains relatively fixed to the third column 3, and the active mechanism 5 is connected to the drive motor 4. This ensures that during steering and extension / retraction adjustments, the drive motor 4 remains fixed to the third column 3. During extension and retraction, the drive motor 4 does not need to move, preventing the wiring from getting stuck with surrounding parts. Furthermore, this solves the problem of severe wear on the drive motor 4 and its wiring, improving the durability of the drive motor 4 and its wiring.

[0034] In some embodiments, refer to Figure 2 As shown, the active mechanism 5 includes an active rod 51 and an active gear 52 mounted on the active rod 51. The active rod 51 is connected to the output shaft of the drive motor 4. The first driven mechanism 6 includes a first driven rod 61, a first driven gear 62 mounted on the first driven rod 61, and a conversion member 63. The conversion member 63 is connected to the first tubular column 1. The first driven gear 62 meshes with the active gear 52. The active rod 51 drives the first driven rod 61 to rotate through the meshing between the active gear 52 and the first driven gear 62. The conversion member 63 converts the rotation of the first driven rod 61 into the axial movement of the first tubular column 1. Thus, under the drive of the drive motor 4, the active rod 51 rotates by transmitting the rotation of the first driven rod 61. The conversion member 63 converts the rotation of the active rod 51 and the first driven rod 61 into the axial movement of the first tubular column 1, causing the first tubular column 1 to retract axially into the second tubular column 2. With the above settings, the drive motor 4 drives the active rod 51 to rotate. During the rotation of the active rod 51, it drives the active gear 52 to rotate, thereby driving the first driven gear 62 meshing with the active gear 52 to rotate, so as to realize the rotation of the first driven rod 61. Since the conversion component 63 is connected to the first tubing 1, the rotation of the first driven rod 61 is converted into the axial movement of the first tubing 1 through the conversion component 63.

[0035] Furthermore, referring to Figure 2As shown, the first driven rod 61 is a lead screw structure, and the first driven gear 62 has an internal thread. The first driven rod 61 and the first driven gear 62 mesh and transmit power. The conversion element 63 is a lead screw nut that meshes with the first driven rod 61. The lead screw nut is sleeved on the first driven rod 61 and has an internal thread that is threadedly connected to the first driven rod 61. The lead screw nut is connected to the first tubular column 1 so that when the first driven rod 61 rotates, the lead screw nut moves axially along the first driven rod 61, thereby driving the first tubular column 1 to retract axially into the second tubular column 2. Through the above arrangement, the external thread on the first driven rod 61 and the internal thread inside the first driven gear 62 are threadedly engaged to fix the first driven rod 61 and the first driven gear 62. The internal thread of the lead screw nut allows it to engage with the external thread of the first driven rod 61, enabling the lead screw nut to transmit power synchronously with the first driven rod 61.

[0036] Furthermore, a lead screw nut seat 64 is connected to the first tubing column 1. The lead screw nut is disposed within the lead screw nut seat 64 and is clearance-fitted with it. Driven by the first driven rod 61, the lead screw nut can rotate within the lead screw nut seat 64 and move axially along the first driven rod 61, thereby driving the lead screw nut seat 64 and the first tubing column 1 to move axially, so that the first tubing column 1 retracts into the second tubing column 2. By dispensing the lead screw nut inside the lead screw nut seat 64 and clearance-fitting it, the lead screw nut rotates within the lead screw nut seat 64 and moves axially under the drive of the first driven rod 61, thereby driving the first tubing column 1 to move axially through the lead screw nut seat 64, thus achieving the first stage of extension and retraction of the steering tubing column.

[0037] It should be noted that the above-described limitations on the first driven rod 61 and the conversion element 63 are merely exemplary configurations. In practical applications, the first driven rod 61 can also be a screw or a round rod, as long as it can mesh with the first driven gear 62 for transmission. The conversion element 63 can also be configured as other conversion structures; for example, the conversion element 63 can be a sliding block with a groove, which, when the first driven rod 61 slides relative to the groove of the sliding block, can drive the first tubular column 1 to move axially.

[0038] In some embodiments, refer to Figure 2As shown, the second driven mechanism 7 includes a second driven rod 71 and a second driven gear 72 disposed on the second driven rod 71. The second driven gear 72 meshes with the driving gear 52 and is connected to the second tube column 2. The second driven rod 71 is connected to the third tube column 3. The driving rod 51 rotates under the drive of the drive motor 4. Through the meshing between the driving gear 52 and the second driven gear 72, the driving rod 51 drives the second driven gear 72 to move axially on the second driven rod 71, so as to drive the second tube column 2 to move axially into the third tube column 3, thus completing the retraction of the second tube column 2. With the above configuration, the drive motor 4 drives the drive rod 51 to rotate. During the rotation of the drive rod 51, the drive gear 52 is driven to rotate, which in turn drives the second driven gear 72, which meshes with the drive gear 52, to rotate. Since the second driven rod 71 is connected to the third column 3, the second driven rod 71 itself will not move axially. This allows the second driven gear 72 to move axially along the second driven rod 71 under the drive of the drive gear 52, thereby driving the second column 2 to move axially, thus realizing the two-stage extension and retraction of the steering column.

[0039] Furthermore, the driving rod 51 is a splined shaft, and the driving gear 52 is provided with an internal spline. The splined shaft and the internal spline of the driving gear 52 are engaged. Therefore, when the driving rod 51 rotates under the drive of the drive motor 4, it can drive the driving gear 52, which is engaged with it, to rotate, so that the driving gear 52 can move axially along the splined shaft. The second driven rod 71 is a lead screw structure, and the second driven gear 72 is provided with an internal thread. The second driven rod 71 and the second driven gear 72 mesh and transmit power. When the driving rod 51 rotates, the driving gear 52 drives the second driven gear 72 to rotate. Since the second driven rod 71 is connected to the third tube column 3, there is no relative displacement between the second driven rod 71 and the third tube column 3. Therefore, when the second driven gear 72 rotates, it can move axially along the second driven rod 71. The splined engagement between the drive rod 51 and the drive gear 52 ensures that the drive gear 52 can rotate with the drive rod 51. The second driven rod 71 is a lead screw structure, with the external thread on the second driven rod 71 threadedly engaged with the internal thread inside the second driven gear 72 to achieve relative fixation between the second driven rod 71 and the second driven gear 72. This allows the second driven gear 72 to move circumferentially relative to the second driven rod 71 when the drive gear 52 drives the meshing second driven gear 72 to rotate.

[0040] Furthermore, a gearbox housing 73 is connected to the second tubular column 2, which can be a threaded connection or other method. The driving gear 52, the first driven gear 62, and the second driven gear 72 are all located within the gearbox housing 73 and can rotate within it. The driving gear 52, the first driven gear 62, and the second driven gear are rotatably supported inside the gearbox housing 73 via rolling bearings or composite material bushings, allowing them to rotate relative to each other within the gearbox housing 73. The second driven gear 72 has a clearance fit with the gearbox housing 73. Driven by the driving gear 52, the second driven gear 72 can rotate within the gearbox housing 73 and move axially along the second driven rod 71, simultaneously transmitting both axial and radial forces between the second driven gear 72 and the gearbox housing 73. This causes the gearbox housing 73 and the second tubular column 2 to move axially, allowing the second tubular column 2 to retract into the third tubular column 3.

[0041] Since the driving gear 52, the first driven gear 62, and the second driven gear 72 are all located inside the gearbox housing 73 and can rotate within the gearbox housing 73, when the gearbox housing 73 moves axially, it can drive the driving gear 52 to move axially on the driving rod 51, and the first driven gear 62 to move axially on the first driven rod 61. The first driven mechanism 6 drives the first column 1 to achieve the first stage of axial adjustment movement, and the second driven mechanism 7 drives the second column 2 to achieve the second stage of axial adjustment movement. The second column 2 only needs to move into the third column 3, that is, the second column 2 has a single movement distance. The second column 2 needs to move into the third column 3, that is, the first column 1 has a double movement distance. Thus, a large travel extension and retraction of the steering wheel can be achieved within a limited arrangement space. Of course, in practical applications, the movement distance between the first column 1 and the second column 2 may not be an integer multiple. The first driven gear 62 and the second driven gear 72 are subjected to uniform force, and the arrangement of the first driven mechanism 6 and the second driven mechanism 7 is not affected by the drive motor 4, which makes the arrangement more flexible, the connection harness design simpler, the various components in the steering column can withstand greater loads, and the durability of each component is better, making it less prone to adjustment failures.

[0042] In some embodiments, refer to Figure 1 and Figure 2As shown, the steering column also includes a reduction mechanism 8. The reduction mechanism 8 reduces the rotational speed of the drive motor 4 to the speed required by the steering column. Since the drive motor 4 experiences a large load during operation, prolonged operation can cause significant damage. By installing the reduction mechanism 8 at the output end of the drive motor 4, the load on the drive motor 4 can be reduced. The load on the drive motor 4 can be adaptively reduced by adjusting the reduction ratio of the reduction mechanism 8. Furthermore, when the reduction mechanism 8 is damaged, only the components on the reduction mechanism 8 need to be replaced, effectively reducing the number of maintenance visits to the drive motor 4 and further improving its durability.

[0043] In some embodiments, the reduction mechanism 8 is a worm gear reduction mechanism, which can reduce the axial space occupied. Specifically, the reduction mechanism 8 includes a worm and a turbine, which are driven by involute teeth. The turbine is connected to the drive motor 4, and the worm is driven by the drive rod 51 of the drive mechanism 5. In practical applications, the reduction mechanism 8 can also be a gear reducer or other reducers used in the drive motor 4.

[0044] It should be noted that the steering column provided in this disclosure can be used not only in vehicles, but also in ships or other mechanical devices, thereby achieving long-stroke telescopic storage.

[0045] This disclosure also provides a steering wheel assembly, including a steering wheel and the aforementioned steering column. The steering wheel and the steering column are connected by a first column 1, such that when the vehicle is in autonomous driving mode, the steering wheel retracts axially into a second column 2 along with the first column 1, and the second column 2 retracts axially into a third column 3, thereby achieving functions such as silent or folding retraction, and significantly improving the cabin space.

[0046] Specifically, when the vehicle is in autonomous driving mode, after the steering column receives the user's steering wheel height adjustment command, the drive motor 4 starts. The drive motor 4 rotates, driving the worm gear to rotate. The worm wheel and worm gear are driven by involute tooth meshing to drive the worm wheel to rotate. The worm wheel drives the drive rod 51 to rotate, thereby driving the drive gear 52 to rotate. Due to the meshing relationship between the drive gear 52 and the first driven gear 62 and the second driven gear 72, the drive gear 52 rotates and drives the first driven gear 62 to rotate. The first driven gear 62 and the first driven rod 61 are connected by an internal thread. The first driven gear 62 drives the first driven rod 61 to rotate. The first driven rod 61 is connected to the lead screw nut by a threaded transmission. The lead screw nut drives the first column 1 to move axially along the first driven rod 61 to achieve the first stage of axial adjustment movement of the first column 1; the drive gear 52 rotates and drives the second driven gear 72 to rotate. The second driven gear 72 and the second driven rod 71 are engaged by internal threads. The second driven rod 71 is fixedly connected to the third column 3. The second driven gear 72 moves axially along the second driven rod 71 and rotates relative to each other in the gearbox housing 73. Thus, the gearbox housing 73 and the second column 2 move axially to achieve the second stage of axial adjustment movement of the second column 2, completing the large-stroke extension and retraction function of the steering wheel. Conversely, it can also restore the steering wheel to its normal state.

[0047] This disclosure also provides a vehicle including the steering wheel assembly described above. During the entire steering process, the driver drives the steering column through the steering wheel in the steering wheel assembly, thereby transmitting the rotation system to make the vehicle rotate. The technical features of the steering wheel assembly used in this vehicle can be found in the steering wheel assembly in the above embodiments, and will not be repeated here.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the term "comprising" or any other variations thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0049] The above are merely specific embodiments of this disclosure, enabling those skilled in the art to understand or implement this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steering column, characterized by include: The first tubing, the second tubing, and the third tubing are connected in a telescopic manner. The drive motor is kept relatively fixed relative to the third tubular column; The active mechanism is connected to the drive motor in a transmission manner; The first driven mechanism is connected to the driving mechanism in a transmission manner, and part of its structure is connected to the first tubular column, so as to drive the first tubular column to move axially relative to the second tubular column through the first driven mechanism; The second driven mechanism is connected to the driving mechanism in a transmission manner, and part of its structure is connected to the second tubular column, so as to drive the second tubular column to move axially relative to the third tubular column through the second driven mechanism; The active mechanism includes an active rod and an active gear disposed on the active rod, and the active rod is drivenly connected to the drive motor. The first driven mechanism includes a first driven rod, a first driven gear and a conversion element disposed on the first driven rod. The conversion element is connected to the first tubular column. The first driven gear meshes with the driving gear. The driving rod drives the first driven rod to rotate through the meshing between the driving gear and the first driven gear. The conversion element converts the rotation of the first driven rod into the axial movement of the first tubular column. The second driven mechanism includes a second driven rod and a second driven gear disposed on the second driven rod. The second driven gear meshes with the driving gear and is connected to the second tubular column. The second driven rod is connected to the third tubular column. The driving rod drives the second driven gear to move on the second driven rod through the meshing between the driving gear and the second driven gear, thereby driving the second tubular column to move axially. The driving rod is a splined shaft, and the driving gear is provided with an internal spline. The splined shaft and the internal spline of the driving gear are engaged, and the driving gear can move along the axial direction of the splined shaft. The second driven rod is a lead screw structure, and the second driven gear is provided with an internal thread. The second driven rod meshes with the second driven gear for transmission.

2. The steering column of claim 1, wherein The first driven rod is a lead screw structure, and the first driven gear is provided with an internal thread. The first driven rod meshes with the first driven gear for transmission. The conversion component is a lead screw nut, which is sleeved on the first driven rod and threadedly connected to the first driven rod.

3. The steering column of claim 2, wherein A lead screw nut seat is connected to the first tubing column. The lead screw nut is disposed in the lead screw nut seat and is clearance-fitted with the lead screw nut seat. The lead screw nut is configured to rotate in the lead screw nut seat and move along the axial direction of the first driven rod under the drive of the first driven rod, so as to drive the lead screw nut seat and the first tubing column to move axially.

4. The steering column of claim 1, wherein A gearbox housing is connected to the second tubular column. The driving gear, the first driven gear, and the second driven gear are all located inside the gearbox housing and can rotate inside the gearbox housing. The second driven gear is clearance-fitted with the gearbox housing. The second driven gear is configured to rotate within the gearbox housing and move axially along the second driven rod under the drive of the driving gear, thereby driving the gearbox housing and the second tubular column to move axially.

5. A steering column according to any one of claims 1 to 4, wherein It also includes a reduction mechanism, which includes a turbine and a worm gear. The turbine and the worm gear are driven by involute teeth. The worm gear is connected to the drive motor, and the turbine is driven by the active mechanism.

6. A steering wheel assembly characterized by, It includes a steering wheel and a steering column as described in any one of claims 1 to 5, wherein the steering wheel is connected to a first column of the steering column.

7. A vehicle characterized by comprising: Includes the steering wheel assembly as described in claim 6.

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