Screw, telescopic mechanism, synchronous telescopic mechanism, steering column assembly and vehicle

Abstract

The invention relates to a screw rod, a telescopic mechanism, a synchronous telescopic mechanism, a steering column assembly and a vehicle. The synchronous telescopic mechanism comprises a plurality of driving gears, driving screw rods and a connecting part, and the driving screw rods and the driving gears are in one-to-one correspondence and are synchronously and rotationally connected; the multiple connecting parts are in one-to-one correspondence with the driving screws and can be connected with the driving screws in a relatively rotating mode, and the multiple driving gears synchronously drive the screws to rotate so that the synchronous telescopic mechanism can drive the steering column to stretch out and draw back synchronously; wherein the plurality of driving gears comprise a first driving gear, the plurality of connecting parts comprise a first tubular column connecting part, the plurality of driving screws comprise first screws connected with the first driving gear and the first tubular column connecting part, the first screws are in threaded fit with the first tubular column connecting part, and the first screws are configured to be capable of being driven by the first driving gear to rotate; therefore, the storage speed of the steering column during large-stroke stretching and retracting is effectively increased, the NVH performance is better, and the cost is lower.

Description

Technical Field

[0001] The present disclosure relates to the technical field of steer-by-wire technology for vehicles, and specifically, to a screw, a telescopic mechanism, a synchronous telescopic mechanism, a steering column assembly, and a vehicle. Background Art

[0002] The current development mode of automobiles has increasingly tended towards electrification and intelligence. The emergence and application of driverless vehicle technology have caused changes and upgrades in vehicle systems. As one of the important components in the vehicle steering system, the steering column structure can achieve long-distance telescopic adjustment to meet the use requirement of automatically storing the vehicle steering wheel in the instrument panel.

[0003] In the related art, the storage time for the steering column system to control the automatic storage of the steering wheel is relatively long. Especially when the steering column realizes telescopic movement with a large stroke of more than 200 mm, the storage time is more than 10 s. Generally, in order to effectively shorten the storage speed of the existing steering column during telescopic movement with a large stroke of more than 200 mm, a drive motor with a higher rotational speed needs to be developed. However, with the increase in the rotational speed of the drive motor, the adjustment noise, R & D cost, and NVH (Noise, Vibration, Harshness) will all face great challenges. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a screw, a telescopic mechanism, a synchronous telescopic mechanism, a steering column assembly, and a vehicle. The synchronous telescopic mechanism can effectively improve the storage speed of the steering column during telescopic movement with a large stroke, and at the same time has better NVH performance and more excellent cost.

[0005] To achieve the above purpose, a first aspect of the present disclosure provides a synchronous telescopic mechanism for a steering column, including: a plurality of drive gears; a plurality of drive screws, which are correspondingly and synchronously rotatably connected to the drive gears one by one; and a plurality of connection parts, which are correspondingly and relatively rotatably connected to the drive screws one by one. The plurality of drive gears synchronously drive the drive screws to rotate, enabling the synchronous telescopic mechanism to drive the steering column to synchronously telescope; wherein, the plurality of drive gears include a first drive gear, the plurality of connection parts include a first column connection part for connecting with a first telescopic column section of the steering column, the plurality of drive screws include a first screw connected to the first drive gear and the first column connection part, the first screw is in threaded cooperation with the first column connection part, and the first screw is configured to be driven to rotate by the first drive gear and also be axially movable relative to the first drive gear.

[0006] Optionally, the first screw includes a first rod section and a second rod section connected to each other. The first rod section is axially movably installed on the first drive gear, and the second rod section is in threaded cooperation with the first column connection part.

[0007] Optionally, the first rod segment is configured as a sliding rod structure with a non-circular cross-section, and the sliding rod structure is connected to the first driving gear; the second rod segment is a screw rod structure, and the sliding rod structure is a spline shaft structure.

[0008] Optionally, the driving gear further includes a second driving gear, the connecting portion further includes a second pipe column connecting portion for connecting with a second telescopic pipe column section of the steering column, the second pipe column connecting portion and the first pipe column connecting portion are axially located on one side of the plurality of driving gears, and the plurality of driving screw rods further include: a second screw rod, which is fixed on the second driving gear and is in threaded cooperation with the second pipe column connecting portion, and the first screw rod is connected to the second pipe column connecting portion to be driven to axially move by the second pipe column connecting portion.

[0009] Optionally, the synchronous telescoping mechanism further includes a gearbox, the plurality of driving gears are installed in the gearbox, the driving gear further includes a third driving gear, the gearbox is provided with a connecting member for connecting with a third telescopic pipe column section of the steering column, the connecting portion further includes a fixed connecting portion for being relatively fixedly arranged with a fixed pipe column of the steering column, and the driving screw rod further includes a third screw rod, which is in threaded cooperation with the third driving gear and is axially fixed and rotatably connected to the fixed connecting portion.

[0010] Optionally, the fixed connecting portion and the first pipe column connecting portion are axially located on both sides of the gearbox, and the rotation direction of the third driving gear is opposite to that of the first driving gear.

[0011] Optionally, the synchronous telescoping mechanism further includes a power input gear for drivingly connecting with a motor, the plurality of driving gears include a first driving gear, a second driving gear and a third driving gear, the third driving gear meshes with the power input gear, and the first driving gear and the second driving gear are respectively located on opposite sides of the third driving gear and respectively mesh with the third driving gear.

[0012] Optionally, the power input gear includes a driving gear for coaxially connecting with the motor, and a reduction gear meshing with the driving gear.

[0013] Optionally, the driving gear and the reduction gear are arranged in a row, the first driving gear, the second driving gear and the third driving gear are arranged in a row, and the plurality of driving gears arranged in a row and the power input gear are arranged in a T shape.

[0014] Optionally, the synchronous telescoping mechanism further includes a gearbox, the plurality of drive gears are installed in the gearbox, the gearbox has a power output part and a power input part forming a T shape, the power input part protrudes from the middle of the power output part, the power input gear is arranged in the power input part, and the plurality of drive gears are arranged in rows in the power output part.

[0015] Optionally, the connecting part includes a pipe column connecting part, the pipe column connecting part includes a nut seat threadedly engaged with the corresponding drive screw, and a connecting seat extending from the nut seat to the side wall of the steering column, wherein at least part of the connecting seat is formed as a sliding structure for slidably passing through the guiding groove of the steering column and driving the steering column to telescopically synchronously.

[0016] A second aspect of the present disclosure further provides a steering column assembly, including: a steering column, including a plurality of pipe columns that are sequentially sleeved from the outside to the inside and can telescopically move along the axial direction, the plurality of pipe columns include a fixed pipe column located on the outermost side, a connecting pipe column located on the innermost side, and a telescopic pipe column located between the fixed pipe column and the connecting pipe column, the connecting pipe column is used for connecting with a vehicle steering wheel; a motor, and the synchronous telescoping mechanism as described above, the motor is in transmission connection with the drive gear, and the synchronous telescoping mechanism is used for connecting with the telescopic pipe column to drive the steering column to telescopically synchronously.

[0017] Optionally, a first guiding groove penetrating the wall surface is axially formed on the outer wall surface of the fixed pipe column, and a second guiding groove penetrating the wall surface is also axially formed on the outer wall surface of each telescopic pipe column, and the connecting part includes a sliding structure corresponding to passing through the first guiding groove or sequentially passing through the first guiding groove and the corresponding second guiding groove.

[0018] A third aspect of the present disclosure further provides a vehicle, including the steering column assembly as described above.

[0019] A fourth aspect of the present disclosure further provides a screw for a telescoping mechanism, including a first rod segment and a second rod segment arranged along the axial direction, the first rod segment is configured as a sliding rod structure with a non-circular cross-section, the second rod segment is a screw structure, the sliding rod structure is used for circumferentially locking and axially movably cooperating with a rotary driving part, and the screw structure is used for threadedly cooperating with a connecting part.

[0020] Optionally, the screw further includes an installation rod segment located between the first rod segment and the second rod segment, and the installation rod segment includes a cylindrical main body and a radial flange formed on the outer peripheral surface of the cylindrical main body.

[0021] The fifth aspect of the present disclosure further provides a telescopic mechanism, including: a rotary driving part; a driving screw rod, which is synchronously rotationally connected to the rotary driving part; and a connecting part, which is in threaded cooperation with the driving screw rod and is used for connecting an external telescopic member; wherein, the driving screw rod is configured to be driven to rotate by the rotary driving part and can also axially move relative to the rotary driving part.

[0022] Optionally, the driving screw rod includes a first rod section and a second rod section. The first rod section is configured as a sliding rod structure with a non-circular cross-section, and the second rod section is a screw rod structure. The sliding rod structure is used for circumferentially locking and axially movably cooperating with the rotary driving part, and the screw rod structure is used for threaded cooperation with the connecting part.

[0023] Through the above technical solution, that is, the synchronous telescopic mechanism of the steering column provided by the present disclosure, the synchronous telescopic mechanism is connected in a one-to-one correspondence and synchronously rotates multiple driving screw rods with multiple driving gears, and a connecting part is rotatably connected to each of the multiple driving screw rods. In this way, when the multiple driving gears drive the driving screw rods to rotate synchronously, the synchronous telescopic mechanism can drive the steering column to achieve synchronous telescoping; further, among the multiple driving screw rods, there is a first screw rod correspondingly connected to the first driving gear and the first column connecting part. The first screw rod is configured to be driven to rotate by the above-mentioned first driving gear and can also axially move relative to the first driving gear. That is, by adding a special first screw rod, it is possible to drive the first column connecting part on it to axially move on the first screw rod and drive the steering column to synchronously telescopically move as the first screw rod rotates, and it is also possible to further drive the steering column to axially telescopically move through the axial movement of the first screw rod itself relative to the first driving gear. In this way, a faster axial telescopic speed can be achieved, effectively improving the telescopic and retracting speed of the steering column during large-stroke telescoping. At the same time, since the synchronous telescopic mechanism can achieve a relatively high telescopic and retracting speed of the steering column by adding the above-mentioned special first screw rod, therefore, the above synchronous telescopic mechanism can continue to use the existing electric adjustable column telescopic motor without further developing a higher-speed motor, so as to reduce the overall R & D cost, and at the same time, it can ensure that the overall has better NVH performance and higher applicability.

[0024] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. They are used together with the following specific implementation to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0026] Figure 1 is a schematic structural diagram of a steering column assembly provided in an exemplary embodiment of the present disclosure;

[0027] Figure 2 is a schematic structural view of a synchronous telescopic mechanism provided in an exemplary embodiment of the present disclosure;

[0028] Figure 3 is a cross-sectional view inside a gearbox provided in an exemplary embodiment of the present disclosure;

[0029] Figure 4 is a partial schematic structural view of a synchronous telescopic mechanism provided in an exemplary embodiment of the present disclosure;

[0030] Figure 5 is a schematic structural view of a steering column provided in an exemplary embodiment of the present disclosure;

[0031] Figure 6 is a schematic structural view of a first screw provided in an exemplary embodiment of the present disclosure;

[0032] Figure 7 is Figure 6 a cross-sectional view at the A-A position in

[0033] Figure 8 is a schematic structural view of a steering column assembly in an unfolded position provided in an exemplary embodiment of the present disclosure;

[0034] Figure 9 is a schematic structural view of a steering column assembly in an intermediate position provided in an exemplary embodiment of the present disclosure;

[0035] Figure 10 is a schematic structural view of a steering column assembly in a stowed position provided in an exemplary embodiment of the present disclosure.

[0036] Description of Reference Numerals

[0037] 1 - Gearbox; 110 - Housing; 120 - Driving Gear; 121 - First Driving Gear; 122 - Second Driving Gear; 123 - Third Driving Gear; 130 - Power Input Gear; 131 - Driving Gear; 132 - Reduction Gear; 140 - Power Output Section; 150 - Power Input Section; 2 - Driving Screw; 210 - First Screw; 211 - First Rod Section; 212 - Second Rod Section; 213 - Mounting Rod Section; 2131 - Cylindrical Body; 2132 - Radial Flange; 220 - Second Screw; 230 - Third Screw; 3 - Connecting Section; 310 - First Pipe Column Connecting Section; 320 - Second Pipe Column Connecting Section; 330 - Fixed Connecting Section; 340 - Nut Seat; 350 - Connecting Seat; 351 - Sliding Structure; 360 - Fixed Seat; 370 - U - shaped Support Frame; 371 - Avoidance Channel; 4 - Connecting Piece; 5 - Motor; 6 - Steering Column; 610 - Fixed Column; 611 - First Guide Groove; 620 - Connecting Column; 630 - Telescopic Column; 631 - Second Guide Groove; 632 - First Telescopic Column Section; 633 - Second Telescopic Column Section; 634 - Third Telescopic Column Section; 7 - Rotary Driving Section; 8 - Reduction Mechanism; 9 - Road Feeling Motor. Detailed Embodiments

[0038] The following provides a detailed description of the specific embodiments of the present disclosure with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present disclosure, and are not intended to limit the present disclosure.

[0039] It should be noted that all actions of obtaining signals, information, or data in the present disclosure are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where it is located, and with the authorization given by the owner of the corresponding device.

[0040] In the present disclosure, unless otherwise stated, the orientation terms such as "upper" and "lower" generally refer to the upper and lower in the space when the synchronous telescopic mechanism is in use. "Inner" and "outer" refer to the inner and outer relative to the contour of the component or structure itself. In addition, it should be noted that the terms such as "first" and "second" are used to distinguish one element from another, and do not have sequentiality and importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same elements.

[0041] In order to solve the problems in the related art of the present disclosure, the present disclosure provides a screw and a related telescopic mechanism, which can enable telescopic components such as the steering column to achieve rapid telescoping. The following will separately elaborate on various aspects of the present disclosure with reference to the accompanying drawings.

[0042] In the first aspect of the present disclosure, a screw is provided for a telescopic mechanism. Refer to Figure 1 、 Figure 6 and Figure 7As shown, the screw includes a first rod section 211 and a second rod section 212 arranged axially. The first rod section 211 is configured as a sliding rod structure with a non-circular cross-section, and the second rod section 212 is a screw structure. The sliding rod structure is used for circumferentially locking and axially movably cooperating with the rotary driving part 7, and the screw structure is used for threadedly cooperating with the connecting part 3. In this way, when the above telescopic mechanism using the screw is applied to, for example, the synchronous telescopic mechanism of a steering column, the rotary driving part 7 can be adaptively configured as, for example, a gearbox 1, and a driving gear 120 synchronously rotatingly connected to the first rod section 211 of the screw is installed in the gearbox 1. The connecting part 3 is configured to be able to axially move along the second rod section 212 of the screw and drive a telescopic tube 630 of the corresponding steering column to telescopically move when the gearbox 1 drives the first rod section 211 of the screw to rotate. And due to the axial movement of the first rod section 211 itself, it can further drive the telescopic tube 630 of the steering column to axially telescopically move. In this way, a faster axial telescopic speed can be achieved, effectively improving the telescopic and retracting speed of the steering column.

[0043] Optionally, in some embodiments, referring to Figure 6 As shown, the screw may further include an installation rod section 213 located between the first rod section 211 and the second rod section 212. The installation rod section 213 includes a cylindrical main body 2131 and a radial flange 2132 formed on the outer peripheral surface of the cylindrical main body 2131. In this way, it can be realized that the radial flange 2132 on the above installation rod section 213 is stably axially fixed and relatively rotatably connected to the column connecting part corresponding to another telescopic tube 630 of, for example, the synchronous telescopic mechanism of the steering column. In this way, when the column connecting part fixedly connected corresponding to the radial flange 2132 moves on the driving screw 2 when the gearbox 1 drives the corresponding driving screw 2 to rotate, it can not only drive the column connecting part on the driving screw 2 to axially move on the driving screw 2 and drive the corresponding telescopic tube 630 to telescopically move, but also synchronously drive the first rod section 211 of the screw to axially move through the above column connecting part. In this way, a faster axial telescopic speed can be achieved, effectively improving the telescopic and retracting speed of the steering column.

[0044] Among them, it should be noted that since the above-mentioned screw and the above-mentioned driving screw 2 can rotate synchronously under the drive of the gearbox 1, that is, under the drive of the gearbox 1, the screw and a driving screw 2 can rotate synchronously, and synchronously drive the connecting part 3 and the pipe string connecting part thereon to axially move, thereby driving the telescopic pipe string 630 of the corresponding steering pipe string to telescopically move. At the same time, the pipe string connecting part on a driving screw 2 can also drive the first rod section 211 of the screw to axially move, and further can achieve, for example, a multiple increase in the telescopic speed of the telescopic pipe string 630. Compared with the traditional two-stage synchronous telescoping, the telescopic mechanism applying the above-mentioned screw provided by the present disclosure can achieve a faster telescopic speed.

[0045] Of course, it should be noted that the above embodiment in which the radial flange 2132 on the mounting rod section 213 is stably axially fixed and rotatably connected to the pipe string connecting part corresponding to the synchronous telescopic mechanism of the steering pipe string is exemplary. In some embodiments not shown, the radial flange 2132 on the mounting rod section 213 can also be drivingly connected to, for example, a driving mechanism (not shown in the figure), so as to realize the axial movement of the first rod section 211 of the screw relative to the rotary driving part 7 by driving the driving mechanism. That is, it can be understood that while the above-mentioned screw and the above-mentioned driving screw 2 rotate synchronously under the drive of the gearbox 1, they synchronously drive the connecting part 3 and the pipe string connecting part thereon to axially move, thereby driving the telescopic pipe string 630 of the corresponding steering pipe string to telescopically move. And the axial movement of the first rod section 211 of the screw relative to the rotary driving part 7 can be adaptively driven by a driving structure. That is to say, the axial movement of the first rod section 211 of the screw relative to the rotary driving part 7 can be synchronous with the rotation of the screw, or can also be asynchronous. The present disclosure does not make specific limitations here, and those skilled in the art can adaptively design according to the telescopic and retractable speed of the steering pipe string required in actual applications. The present disclosure is not limited thereto.

[0046] Among them, the above-mentioned driving mechanism can drive driving parts such as a driving cylinder. The present disclosure does not make specific limitations here, and the purpose is to be able to realize the axial movement of the screw. Those skilled in the art can adaptively design the specific structure according to the application requirements. In addition, in order to better ensure that the screw has a high service life, in some embodiments, the first rod section 211 of the screw can be, for example, a plastic-coated metal structure, and the mounting rod section 213 and the second rod section 212 can be constructed of, for example, a metal material, so as to ensure that the whole screw has a high service life. Of course, the above embodiment is exemplary. In some other embodiments, those skilled in the art can also adaptively construct the specific structure and material of the screw according to the actual application requirements. The present disclosure is not limited thereto.

[0047] In addition, it should be noted that the implementation of applying the above telescopic mechanism screw to, for example, the synchronous telescopic mechanism of a steering column is exemplary. In some other implementations, the above telescopic mechanism screw can also be applied to any telescopic mechanism that needs to achieve rapid telescopic movement.

[0048] Based on this, in the second aspect of the present disclosure, a telescopic mechanism is further provided, including a rotary driving part 7, a driving screw 2, and a connecting part 3. The driving screw 2 is connected to the rotary driving part 7 in a synchronously rotating manner; the connecting part 3 is in threaded cooperation with the driving screw 2 and is used to connect an external telescopic member; wherein, the driving screw 2 is configured to be able to be driven to rotate by the rotary driving part 7 and can also axially move relative to the rotary driving part 7, so that when the driving screw 2 is driven to rotate by the rotary driving part 7, the connecting part 3 on the driving screw 2 can be driven to axially move on the driving screw 2, and further drive the external telescopic member to perform telescopic movement. And because the driving screw can also axially move relative to the rotary driving part 7, a faster axial telescopic speed can be achieved in this way.

[0049] It can be understood that the synchronously rotating connection means that the driving screw 2 is connected to the rotary driving part 7 to achieve synchronous rotation, that is, the rotations of the two are synchronous.

[0050] Optionally, in some implementations, as shown in Figures 1 to 4 the driving screw 2 can be adaptively connected to the rotary driving part 7 coaxially and in a synchronously rotating manner. In this way, it is convenient to realize the rotation of the driving screw 2 through the rotary driving part 7 and facilitate the installation operation.

[0051] Among them, it should be noted that the driving screw 2 can be configured to have the same structure as the above telescopic mechanism screw, that is, the driving screw 2 can include a first rod section 211 and a second rod section 212. The first rod section 211 is configured to have a sliding rod structure with a non-circular cross-section, and the second rod section 212 is a screw structure. The sliding rod structure is used for circumferentially locking and axially movably cooperating with the rotary driving part 7, and the screw structure is used for threaded cooperation with the connecting part 3, so that the driving screw 2 can be driven to rotate around the central axis by the rotary driving part 7, and the first rod section 211 of the driving screw 2 can axially move relative to the rotary driving part 7, and further achieve a faster axial telescopic speed.

[0052] In addition, it should be noted that the axial movement of the driving screw 2 can be achieved, for example, by arranging the first rod section 211 and the second rod section 212 axially, and axially fixing and rotatably connecting the radial flange 2132 on the mounting rod section 213 between the first rod section 211 and the second rod section 212 to the connecting portion 3 that is in threaded engagement with another driving screw 2. The other driving screw 2 and the above-mentioned driving screw 2 are configured to be able to rotate synchronously under the drive of the rotary drive portion 7. In this way, it is possible to drive the above-mentioned driving screw 2 to rotate through the rotary drive portion 7, and it is also possible to achieve axial movement relative to the rotary drive portion 7 under the drive of the connecting portion 3 on the other driving screw 2. The rotary drive portion 7 can be configured as, for example, a gearbox 1, and a plurality of rotating drive gears 120 are installed in the gearbox 1, so as to be able to achieve the rotation of a plurality of driving screws 2.

[0053] In addition, it should be noted that the axial movement of the first rod section 211 of the above-mentioned driving screw 2 relative to the rotary drive portion 7 can be synchronous with the rotation of the driving screw 2, or can also be asynchronous. The present disclosure does not make specific limitations here, and those skilled in the art can adaptively design according to actual needs. The present disclosure is not limited thereto.

[0054] Optionally, in some embodiments, referring to Figures 1 to 4 As shown, a plurality of driving screws 2 can be adaptively connected to a plurality of drive gears 120 in a one-to-one correspondence and rotate synchronously coaxially. In this way, it is possible to facilitate the rotation of the driving screw 2 through the rotary drive portion 7 configured as, for example, a gearbox 1, and facilitate the installation operation.

[0055] Taking the application of the above-mentioned telescopic mechanism with a screw in the synchronous telescopic mechanism of a steering column as an example, in the third aspect of the present disclosure, a synchronous telescopic mechanism for a steering column is further provided. Referring to Figures 1 to 7 As shown, the synchronous telescopic mechanism includes a plurality of drive gears 120, a plurality of driving screws 2, and a plurality of connecting portions 3. The plurality of driving screws 2 are connected to the drive gears 120 in a one-to-one correspondence and rotate synchronously; the plurality of connecting portions 3 are connected to the driving screws 2 in a one-to-one correspondence and are rotatable relative to each other. The plurality of drive gears 120 synchronously drive the driving screws 2 to rotate, so that the synchronous telescopic mechanism can drive the steering column to telescopically move synchronously; wherein, the plurality of drive gears 120 include a first drive gear 121, the plurality of connecting portions 3 include a first column connecting portion 310 for connecting to the first telescopic column section 632 of the steering column, and the plurality of driving screws 2 include a first screw 210 connected to the first drive gear 121 and the first column connecting portion 310. The first screw 210 is in threaded engagement with the first column connecting portion 310, and the first screw 210 is configured to be able to be driven to rotate by the first drive gear 121 and can also axially move relative to the first drive gear 121.

[0056] Through the above technical solution, that is, the synchronous telescopic mechanism of the steering column provided by the present disclosure, the synchronous telescopic mechanism is connected in a one-to-one correspondence and synchronously rotatably to a plurality of drive screws 2 and a plurality of synchronously rotating drive gears 120, and a connecting portion 3 is rotatably connected to each of the plurality of drive screws 2. In this way, when the plurality of drive gears 120 synchronously drive the drive screws 2 to rotate, the synchronous telescopic mechanism can drive the steering column to achieve synchronous telescoping; further, among the plurality of drive screws 2, there is a first screw 210 correspondingly connected to the first drive gear 121 and the first column connecting portion 310. The first screw 210 is configured to be driven to rotate by the first drive gear 121 and can also axially move relative to the first drive gear 121. That is, by adding a special first screw 210, it is possible to drive the first column connecting portion 310 thereon to axially move on the first screw 210 and drive the steering column to synchronously telescopically move as the first screw 210 rotates. Further, the axial telescopic movement of the steering column can be further driven by the axial movement of the first screw 210 itself relative to the first drive gear 121. In this way, a faster axial telescopic speed can be achieved, effectively improving the telescopic and retractable speed of the steering column during large-stroke telescoping. At the same time, since the synchronous telescopic mechanism can achieve a relatively high telescopic and retractable speed of the steering column by adding the above special first screw 210, therefore, the above synchronous telescopic mechanism can continue to use the existing electric adjustable column telescopic motor without further developing a higher-speed motor, which can reduce the overall R & D cost and at the same time ensure better NVH performance and higher applicability of the whole.

[0057] Optionally, in some embodiments, referring to Figures 1 to 4 as shown, a plurality of connecting portions 3 can be adaptively connected to a plurality of drive screws 2 in a one-to-one correspondence coaxially and synchronously rotatably for easy installation operation.

[0058] In addition, in some embodiments, the first screw 210 can be configured to have the same structure as the screw for the telescopic mechanism described above, that is, referring to Figure 1 、 Figure 6 and Figure 7As shown, the first screw rod 210 may include a connected first rod section 211 and a second rod section 212. The first rod section 211 is axially movably mounted on the first drive gear 121, and the second rod section 212 is in threaded cooperation with the first pipe column connection part 310. In this way, when the first drive gear 121 drives the first screw rod 210 to rotate, the first pipe column connection part 310 can move axially along the second rod section 212 of the first screw rod 210 and drive the first telescopic pipe column section 632 of the corresponding steering pipe column to telescopically move. And because of the axial movement of the axis of the first rod section 211 of the first screw rod 210, it can further drive another telescopic pipe column 630 to telescopically move, so that a faster axial telescopic speed can be achieved, effectively improving the telescopic and retractable speed of the steering pipe column.

[0059] Optionally, in some embodiments, referring to Figure 1 , Figure 6 and Figure 7 As shown, the first rod section 211 may be configured as a slide rod structure with a non-circular cross-section. The slide rod structure and the first drive gear 121 may be, for example, surface-connected; the second rod section 212 is a screw rod structure, and the slide rod structure is a spline shaft structure. Thus, while the first screw rod 210 can rotate around the central axis, the first rod section 211 of the first screw rod 210 can also axially move relative to the first drive gear 121, thereby achieving a faster axial telescopic speed.

[0060] Among them, the spline shaft structure may be configured as, for example, Figure 7 the plum blossom type with four petal structures as shown, or the number of petal structures may also be three or more, and the present disclosure does not make specific limitations. Of course, the spline shaft structure may not be limited to the plum blossom type structure. In some embodiments not shown, it may also be other polygonal structures such as square. The present disclosure is not limited thereto.

[0061] In addition, it should be noted that since the above-mentioned first screw rod 210 has the same structure as the screw rod for the telescopic mechanism, that is, an installation rod section 213 is also connected between the first rod section 211 and the second rod section 212 of the first screw rod 210. The installation rod section 213 may include a cylindrical main body 2131 and a radial flange 2132 formed on the outer peripheral surface of the cylindrical main body 2131. In this way, the rotation of the first screw rod 210 can be achieved, and the axial movement of the first screw rod 210 can also be achieved. Since the first screw rod 210 may be the same as the above-mentioned screw rod for the telescopic mechanism, the specific structure of the screw rod for the telescopic mechanism has been described above, and the present disclosure will not repeat it here.

[0062] Optionally, in some embodiments, referring to Figures 1 to 4As shown, multiple connecting parts 3 can be coaxially and synchronously rotatably connected to the driving screw 2 one by one. In this way, when the multiple driving gears 120 synchronously drive the driving screw 2 to rotate, the synchronous telescopic mechanism can drive the steering column to telescopically move synchronously, with high reliability and convenient installation and operation.

[0063] In addition, the rotation of the first screw 210 relative to the first driving gear 121 can be synchronous with the axial movement of the first screw 210 relative to the first driving gear 121, or it can also be asynchronous. The specific structural arrangement has been described above, and the present disclosure will not elaborate here.

[0064] In some embodiments, referring to Figures 1 to 6 As shown, the driving gear 120 may further include a second driving gear 122, and the connecting part 3 further includes a second column connecting part 320 for connecting with the second telescopic column section 633 of the steering column. The second column connecting part 320 and the first column connecting part 310 are axially located on one side of the multiple driving gears 120. The multiple driving screws 2 further include a second screw 220, which is fixed on the second driving gear 122 and is in threaded cooperation with the second column connecting part 320. In this way, two-stage synchronous telescoping of the steering column can be achieved through the first column connecting part 310 and the second column connecting part 320, and the first screw 210 is connected to the second column connecting part 320 to be driven to move axially by the second column connecting part 320, thereby enabling a telescoping speed faster than that of the traditional two-stage synchronous telescoping. Moreover, since the second column connecting part 320 can drive the first rod section 211 of the first screw 210 to move axially, it can also reduce the space occupied by the entire synchronous telescoping mechanism in the axial direction, so as to provide more usable space for the subsequent layout of the whole vehicle.

[0065] Specifically, Figure 2 exemplarily shows that the second column connecting part 320 further includes a fixed seat 360 axially fixed and rotatably connected to the first rod section 211 of the first screw 210, and a U-shaped support frame 370 is fixedly connected between the fixed seat 360 and the connecting seat 340 of the second column connecting part 320. In this way, when the connecting seat 340 axially moves on the second screw 220, the first rod section 211 of the first screw 210 can be driven to move axially through the fixed seat 360.

[0066] At the same time, it should be noted that Figure 2It is also exemplarily shown that the U-shaped support frame 370 may also have an avoidance channel 371. In this way, when, for example, the gearbox 1 axially moves on the third screw 230, the third screw 230 can be avoided through the avoidance channel 371 of the U-shaped support frame 370, so as to ensure the stable operation of the synchronous telescopic mechanism. At the same time, by providing the above U-shaped support frame 370, the stability between the first screw 210 and the second screw 220 can also be improved, and further ensure the stable operation of the synchronous telescopic mechanism. Among them, the specific structure of the fixed seat 360 can be constructed in any suitable manner, and the present disclosure does not make specific limitations.

[0067] Optionally, in some embodiments, referring to Figures 1 to 6 As shown, the rod section of the second screw 220 fixed to the second driving gear 122 can be located, for example, inside the housing 110 of the gearbox 1 and is coaxially and relatively rotatably connected to the second driving gear 122. At the same time, the rod section of the second screw 220 that is threadedly engaged with the second pipe column connection portion 320 can be located, for example, outside the housing 110 of the gearbox 1, so as to drive the first screw 210 to axially move through the second pipe column connection portion 320.

[0068] Of course, it should be noted that the second screw 220 among the multiple driving screws 2 of the synchronous telescopic mechanism can be adaptively configured as two, three or even more. Further, a pipe column connection portion is threadedly engaged on each second screw 220, and the telescopic pipe column 630 of the steering pipe column is adaptively configured as multiple sections. In this way, the pipe column connection portion is fixedly connected to the corresponding telescopic pipe column 630 respectively, so as to realize the multi-stage synchronous telescoping of the steering pipe column. At the same time, since one of the multiple driving screws 2 is a first screw 210, and the radial flange 2132 on the mounting rod section 213 of the first screw 210 is axially fixed and relatively rotatably connected to the pipe column connection portion on at least one second screw 220, a telescoping motion faster than that of the traditional multi-stage synchronous telescoping can be realized.

[0069] In addition, in some other embodiments, the number of the second screws 220 among the plurality of drive screws 2 can be configured to be only one, while the number of the first screws 210 can be configured to be two, three or even more. Further, a pipe column connecting portion is threadedly engaged with the second rod segment 212 of each first screw 210 and is fixedly connected to the multi-section telescopic pipe column 630 of the steering pipe column respectively. Further, the mounting rod segment 213 between the first rod segment 211 and the second rod segment 212 of each first screw 210 is axially fixed and rotatably connected to the pipe column connecting portion on an adjacent first screw 210. In this way, multi-stage synchronous telescoping of the steering pipe column can be achieved. At the same time, when the pipe column connecting portion on each first screw 210 synchronously drives the multi-section telescopic pipe column 630 to move on the corresponding first screw 210, it can also synchronously drive the first rod segment 211 of the first screw 210 fixedly connected thereto to move axially. In this way, a telescoping motion faster than that of the traditional multi-stage synchronous telescoping can also be achieved.

[0070] The above two embodiments for realizing multi-stage synchronous telescoping are exemplary. Those skilled in the art can adaptively select the number of the first screws 210 and the second screws 220 according to the actual telescoping speed requirements. The present disclosure is not limited thereto. However, it should be noted that in the above embodiments, it is necessary to ensure that the pipe column connecting portions on the first screws 210 and the second screws 220 are both axially located on one side of the gearbox 1.

[0071] Based on the embodiment in the above embodiment in which the synchronous telescoping mechanism drives the steering pipe column to achieve two-stage synchronous telescoping, that is, when the number of both the first screw 210 and the second screw 220 is one, further, in some embodiments, referring to Figures 1 to 6 As shown, the drive gear 120 further includes a third drive gear 123, and the synchronous telescoping mechanism further includes a gearbox 1. The plurality of drive gears 120 are all exemplarily installed in, for example, the box body 110 of the gearbox 1 to ensure the stable operation of the plurality of drive gears 120.

[0072] In addition, in some embodiments, referring to Figures 1 to 6 As shown, a connecting member 4 for connecting to the third telescopic pipe column section 634 of the steering pipe column can be provided on the gearbox 1. The connecting portion 3 further includes a fixed connecting portion 330 for being relatively fixedly arranged with the fixed pipe column 610 of the steering pipe column. The drive screw 2 further includes a third screw 230. The rod segment of the third screw 230, for example, located inside the box body 110 can be threadedly engaged with the third drive gear 123, and the rod segment of the third screw 230, for example, located outside the box body 110 can be axially fixed and rotatably connected to the fixed connecting portion 330.

[0073] Furthermore, the fixed connection part 330 and the first pipe column connection part 310 can be axially located on both sides of the gearbox 1, and the rotation direction of the third driving gear 123 is opposite to the rotation directions of both the first driving gear 121 and the second driving gear 122. In this way, the movement of the gearbox 1 on the third screw 230 can drive the first screw 210 and the second screw 220 on the gearbox 1 to move axially synchronously, thereby realizing the three-stage synchronous telescopic movement of the steering column driven by the synchronous telescopic mechanism. At the same time, since the gearbox 1 can move axially on the third screw 230, it can further reduce the space occupied by the entire synchronous telescopic mechanism in the axial direction, and further improve the telescopic and retractable speed of the steering column.

[0074] It should be noted that when the number and structure of the first screw 210 and the second screw 220 are multiple, the gearbox 1 can also be configured to be axially movable along the third screw 230, or the gearbox 1 is configured to be fixedly connected to the fixed pipe column 610 of the steering column. The present disclosure does not make specific limitations here, and those skilled in the art can adaptively configure according to actual application requirements.

[0075] In addition, those skilled in the art can adaptively configure the specific structure of the fixed connection part 330 according to actual use requirements. The purpose is that as long as it can axially fix one end of the third screw 230 and be rotatably connected relative to the ground, and further realize the relative fixed setting with the fixed connection 610 of the steering column through the fixed connection part 330. For example, the fixed connection part 330 can be a nut fixing seat, so that the gearbox 1 can axially move on the third screw 230 along the third screw 230. In addition, the gearbox 1 can also be fixedly connected to the reduction mechanism 8 through the fixed connection part 330, so that the gearbox 1 can be fixedly connected to the reduction mechanism 8, that is, the gearbox 1 does not move axially. The present disclosure does not make specific limitations.

[0076] In some embodiments, referring to Figures 1 to 6 As shown, the synchronous telescopic mechanism may further include a power input gear 130 for drivingly connecting with the motor 5. A plurality of driving gears 120 are arranged in a row. The driving gear 120 located in the middle is drivingly connected with the power input gear 130, and the other driving gears 120 are meshed with the driving gear 120 connected to the power input gear 130, so that the plurality of driving gears 120 arranged in a row and the power input gear 130 are arranged in a T shape, making the spatial layout of the plurality of driving gears 120 more compact, the overall space occupancy rate lower, with high applicability, and at the same time, it can also realize driving the plurality of driving gears 120 to rotate by one motor 5, with high efficiency and convenient installation and manufacturing.

[0077] It is understandable that the row arrangement in the present invention refers to a substantially row arrangement, that is, the axes of the plurality of drive gears 120 are not strictly required to be on the same straight line, and it is sufficient if they are substantially on the same straight line.

[0078] Among them, Figure 3 Exemplarily, it is shown that the power input gear 130 may include a driving gear 131 for coaxial connection with the motor 5, and a reduction gear 132 meshing with the driving gear 131. The driving gear 131 and the reduction gear 132 are arranged in a row, and the drive gear 120 may include a first drive gear 121, a second drive gear 122, and a third drive gear 123 arranged in a row. The third drive gear 123 meshes with the reduction gear 132. The first drive gear 121 and the second drive gear 122 are respectively located on opposite sides of the third drive gear 123 and respectively mesh with the third drive gear 123, so that it can be realized that the first drive gear 121, the second drive gear 122, and the third drive gear 123 are driven to rotate simultaneously by the driving gear 131 driven by the motor 5. And because a reduction gear 132 is also meshingly connected between the driving gear 131 and the third drive gear 123, it is possible to achieve speed reduction and torque increase through the reduction gear 132.

[0079] In addition, it should be noted that the embodiment in which the drive gear 120 may include a first drive gear 121, a second drive gear 122, and a third drive gear 123 arranged in a row is exemplary. In some other illustrated embodiments, the specific number of the drive gears 120 may be adaptively arranged according to the specific number of the above-mentioned drive screws 2. The present disclosure is not limited thereto.

[0080] In some embodiments, referring to Figures 1 to 6 as shown, the gearbox 1 may have a power output portion 140 and a power input portion 150 forming a T shape. The power input portion 150 protrudes from the middle of the power output portion 140. The power input gear 130 is arranged in the power input portion 150, and a plurality of drive gears 120 are arranged in a row in the power output portion 140. In this way, it is convenient to arrange the drive gears 120 along the power output portion 140, so as to facilitate the installation layout of the drive screws 2 on the subsequent drive gears 120. At the same time, since the inner chamber of the gearbox 1 has a T-shaped structure, the spatial layout inside the gearbox 1 is more compact, the overall space occupancy rate is also lower, and the applicability is high.

[0081] In order to better ensure that the first drive gear 121, the second drive gear 122, and the third drive gear 123 are driven to rotate by the driving gear 131 driven by the motor 5, in some embodiments, referring to Figure 3As shown, the rotational direction of the driving gear 131 and the reduction gear 132 can be opposite. Further, the rotational direction of the reduction gear 132 and the third driving gear 123 is opposite. Further, the rotational directions of the first driving gear 121 and the second driving gear 122 are the same and opposite to the rotational direction of the third driving gear 123;

[0082] Further, in some embodiments, the thread pitches of the corresponding threaded segments of the driving screws 2 on the first driving gear 121 and the second driving gear 122 can be the same, and the thread pitches of the corresponding threaded segments of the driving screws 2 on the third driving gear 123 and the first driving gear 121 are opposite. In this way, it is possible to stably and synchronously drive the first driving gear 121, the second driving gear 122, and the third driving gear 123 to rotate under the drive of the motor 5. Of course, the rotational directions of the driving gears 120 and the thread pitches of the driving screws 2 described above are exemplary, and those skilled in the art can arrange them adaptively according to actual usage requirements. The purpose is to ensure that the driving gear 131 can synchronously drive multiple driving gears 120 to rotate, and the present disclosure is not limited thereto.

[0083] In some embodiments, referring to Figures 1 to 5 As shown, the connecting portion 3 may include a pipe column connecting portion, and the pipe column connecting portion includes a nut seat 340 that is threadedly engaged with the corresponding driving screw 2, and a connecting seat 350 that extends from the nut seat 340 to the side wall of the steering column. At least a part of the connecting seat 350 is formed as a sliding structure 351 for slidably passing through the guiding groove of the steering column and driving the steering column to synchronously expand and contract. The overall structure is simple and convenient for installation and manufacturing. Among them, the sliding structure 351 can be, for example, a skateboard structure, which is simple in structure and convenient for installation and manufacturing.

[0084] The fourth aspect of the present disclosure also provides a steering column assembly, referring to Figure 1 and Figure 3As shown in the figure, the steering column assembly includes a steering column 6, a motor 5, and the above-mentioned synchronous telescopic mechanism. The steering column 6 includes multiple tubes that are slidably sleeved with each other from the outside to the inside and can axially telescope. The multiple tubes include a fixed tube 610 located on the outermost side, a connecting tube 620 located on the innermost side, and a telescopic tube 630 located between the fixed tube 610 and the connecting tube 620. The connecting tube 620 is used to connect to the vehicle steering wheel; the motor 5 is arranged outside the gearbox 1 of the synchronous telescopic mechanism and is in transmission connection with the driving gear 120 inside the gearbox 1. The connecting part 3 at least includes a tube connecting part connected to the telescopic tube 630, so as to drive the driving gear 120 inside the gearbox 1 to rotate through the motor 5, and when the driving screw 2 on the driving gear 120 rotates, drive the multiple telescopic tubes 630 to synchronously telescope axially. By providing the above-mentioned synchronous telescopic mechanism, the steering column assembly can effectively improve the storage speed of the steering column during large-stroke telescoping, and at the same time has better NVH performance and more excellent cost. In addition, the steering column assembly also has all the beneficial effects of the above-mentioned synchronous telescopic mechanism, which will not be elaborated here in this disclosure.

[0085] Among them, the telescopic tube 630 of the steering column can be adaptively configured into multiple sections. For example, Figure 1 An embodiment in which the telescopic tube 630 is a three-section synchronous telescoping is exemplarily shown in the figure. For this reason, the number of sections of the telescopic tube 630 can be adaptively configured into three sections, that is, it includes a first telescopic tube section 632, a second telescopic tube section 633, and a third telescopic tube section 634. Of course, the above embodiment is exemplary, and those skilled in the art can adaptively select the corresponding number of sections of the telescopic tube 630 according to actual application requirements, and this disclosure does not make specific limitations here.

[0086] In addition, it should be noted that the connecting tube 620 and the vehicle steering wheel can adopt, for example, spline connection, and only rotation but no relative axial sliding can be achieved between the connecting tube 620 and the adjacent telescopic tube 630. Further, a connecting shaft (not shown in the figure) is also sleeved inside the connecting tube 620. The connecting tube 620 and the connecting shaft are rotatably connected and can move relative to each other axially. In this way, when the synchronous telescopic mechanism drives the steering column to synchronously telescope, it can also drive the vehicle steering wheel on the steering column to be automatically stored inside the instrument panel or telescoped outside the instrument panel.

[0087] In addition, it should be noted that a reduction mechanism 8 may be provided at one end of the fixed column 610 away from the vehicle steering wheel, and the connecting shaft may be constructed as, for example, a spline shaft and connected to the connecting column 620, so that the two can rotate and move relative to each other at the same time. In this way, the end of the connecting shaft away from the connecting column 620 is transmission-connected to the reduction mechanism 8. In this way, when the driver turns the vehicle steering wheel, a reverse torque can be applied through the road sense motor 9 transmission-connected to the reduction mechanism 8 to simulate the hand feel. The specific structures of the above-mentioned reduction mechanism 8 and road sense motor 9 and the specific connection structure between the two are not specifically limited in the present disclosure, and those skilled in the art can design adaptively according to actual application requirements.

[0088] In some embodiments, reference Figures 1 to 5 As shown, a first guide groove 611 penetrating the wall surface can be axially opened on the outer wall surface of the fixed column 610, and a second guide groove 631 penetrating the wall surface can also be axially opened on the outer wall surface of each telescopic column 630, and the connecting part 3 includes a sliding structure 351 corresponding to the first guide groove 611 or sequentially passing through the first guide groove 611 and the corresponding second guide groove 631, so that the synchronous telescopic mechanism can drive the steering column to synchronously telescope.

[0089] The connecting portion 3 may be constructed in any suitable manner, for example Figure 2 and Figure 5 As shown, the column connection portion of the connection portion 3 may include a nut seat 340 threadedly matched with the corresponding driving screw 2, and a connection seat 350 extending from the nut seat 340 to the side wall of the steering column and capable of correspondingly passing through the first guide groove 611 or sequentially passing through the first guide groove 611 and the corresponding second guide groove 631. The connection seat 350 may be configured as, for example Figure 2 and Figure 5 The connecting plate structure shown is fixedly connected to the nut seat 340 and extends from the nut seat 340 to the side wall of the steering column, and the portion of the connecting plate structure that passes through the guide groove forms the above-mentioned sliding structure 351. At the same time, the sliding structures 351 formed on each connecting plate structure are arranged in the same plane, so that it can ensure that the synchronous telescopic mechanism can stably drive the multi-section telescopic columns 630 to synchronously telescope, and the overall structure is simple and easy to install and manufacture.

[0090] Further, in some embodiments, reference Figure 5As shown, the outer wall surface of one end of each telescopic pipe column 630 away from the vehicle steering wheel is fixedly connected to the above-mentioned sliding structure 351. The second guiding grooves 631 penetrating the wall surface are axially formed on the outer wall surface of each telescopic pipe column 630 between the sliding structure 351 and the end close to the vehicle steering wheel, so that the sliding structure 351 on the inner telescopic pipe column 630 among the multi-section telescopic pipe columns 630 can pass through the second guiding groove 631 and then pass through the first guiding groove 611. In this way, it can be ensured that when the synchronous telescopic mechanism axially telescopically moves to the unfolded position as shown in Figure 8 , the overall space occupation range will not exceed the space range of the fixed pipe column 610 itself, so as to save more usable space for the subsequent layout of the whole vehicle.

[0091] In addition, it should be noted that the specific outer shape structure of the above-mentioned nut seat 340, the specific outer shape structure of the connecting member 4, and the specific outer shape structure of the above-mentioned connecting plate structure are not specifically limited in this disclosure. The purpose is to be able to stably connect the synchronous telescopic mechanism to the telescopic pipe column 630 of the steering column. Those skilled in the art can adaptively design according to actual application requirements.

[0092] Based on the above embodiments and in combination with Figures 1 to 10 , this disclosure exemplarily describes the working process of the synchronous telescopic mechanism driving the steering column to synchronously telescope. It should be noted that for the convenience of description, this disclosure defines that the above-mentioned synchronous telescopic mechanism is in the retracted position as shown in Figure 10 . At the same time, it is defined that the number of driving screws 2 is three, that is, including the above-mentioned first screw 210, second screw 220, and third screw 230. The specific working process is as follows:

[0093] First, when it is necessary to extend the vehicle steering wheel out of the instrument panel, an extension command can be sent to the synchronous telescopic mechanism through, for example, an external controller (not shown in the figure). Thus, the motor 5 will drive the driving gear 131 to rotate counterclockwise. The reduction gear 132 meshes with the driving gear 131 and rotates clockwise. The third driving gear 123 meshes with the reduction gear 132 and rotates counterclockwise. The first driving gear 121 and the second driving gear 122 mesh with the third driving gear 123 and rotate clockwise respectively. Correspondingly, the first driving gear 121, the second driving gear 122, and the third driving gear 123 drive the corresponding first screw rod 210, second screw rod 220, and third screw rod 230 to rotate respectively, and respectively cause the first column connection part 310 on the first screw rod 210 to axially move on the first screw rod 210 and drive a telescopic column 630 to move. The second column connection part 320 on the second screw rod 220 axially moves on the second screw rod 220 and drives a telescopic column 630 and the first rod section 211 of the first screw rod 210 to move synchronously. The gearbox 1 on the third screw rod 230 axially moves on the third screw rod 230 and drives a telescopic column 630 to move. In this way, it can be realized that the steering column is extended to the unfolded position as shown in Figure 8 so as to complete the operation of extending the vehicle steering wheel out of the instrument panel;

[0094] Then, when it is necessary to retract the vehicle steering wheel into the instrument panel, a contraction command can be sent to the synchronous telescopic mechanism through, for example, an external controller. Thus, the motor 5 will drive the driving gear 131 to rotate clockwise. The reduction gear 132 meshes with the driving gear 131 and rotates counterclockwise. The third driving gear 123 meshes with the reduction gear 132 and rotates clockwise. The first driving gear 121 and the second driving gear 122 mesh with the third driving gear 123 and rotate counterclockwise respectively. Correspondingly, the first driving gear 121, the second driving gear 122, and the third driving gear 123 drive the corresponding first screw rod 210, second screw rod 220, and third screw rod 230 to rotate synchronously, and respectively cause the first column connection part 310 on the first screw rod 210 to axially move on the first screw rod 210 and drive a telescopic column 630 to move. The second column connection part 320 on the second screw rod 220 axially moves on the second screw rod 220 and drives a telescopic column 630 and the first rod section 211 of the first screw rod 210 to move synchronously. The gearbox 1 on the third screw rod 230 axially moves on the third screw rod 230 and drives a telescopic column 630 to move. In this way, it can be realized that the steering column first moves from the unfolded position as shown in Figure 8 to the intermediate position as shown in Figure 9 under the drive of the synchronous telescopic mechanism;

[0095] Finally, the external controller continues to send a contraction command to the synchronous telescopic mechanism until the steering column is from as shown inFigure 9 the intermediate position shown moves to Figure 10 the storage position shown, thereby completing the operation of storing the vehicle steering wheel in the instrument panel.

[0096] In the fifth aspect of the present disclosure, a vehicle is further provided, including the above-mentioned steering column assembly. This vehicle can effectively improve the storage speed of the steering column during large-stroke telescoping, and at the same time has better NVH performance and more excellent cost. In addition, this vehicle also has all the beneficial effects of the above-mentioned steering column assembly, which will not be elaborated herein in the present disclosure.

[0097] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0098] In addition, it should be noted that, in the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0099] Furthermore, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A synchronous telescopic mechanism for a steering column, characterized in that, it includes: a plurality of driving gears; a plurality of driving screws, which are correspondingly and synchronously rotatably connected to the driving gears one by one; and a plurality of connecting parts, which are correspondingly and relatively rotatably connected to the driving screws one by one. The plurality of driving gears synchronously drive the driving screws to rotate, enabling the synchronous telescopic mechanism to drive the steering column to synchronously telescope; wherein, the plurality of driving gears include a first driving gear, the plurality of connecting parts include a first column connecting part for connecting with a first telescopic column section of the steering column, the plurality of driving screws include a first screw connected to the first driving gear and the first column connecting part, the first screw is in threaded cooperation with the first column connecting part, and the first screw is configured to be driven to rotate by the first driving gear and can also axially move relative to the first driving gear.

2. The synchronous telescopic mechanism according to claim 1, characterized in that, the first screw includes a connected first rod section and a second rod section. The first rod section is axially movably installed on the first driving gear, and the second rod section is in threaded cooperation with the first column connecting part.

3. The synchronous telescopic mechanism according to claim 2, characterized in that, the first rod section is configured as a sliding rod structure with a non-circular cross-section, and the sliding rod structure is connected to the first driving gear; the second rod section is a screw structure, and the sliding rod structure is a spline shaft structure.

4. The synchronous telescopic mechanism according to any one of claims 1-3, characterized in that, the driving gears further include a second driving gear, the connecting parts further include a second column connecting part for connecting with a second telescopic column section of the steering column. The second column connecting part and the first column connecting part are axially located on one side of the plurality of driving gears. The plurality of driving screws further include: a second screw, which is fixed on the second driving gear and is in threaded cooperation with the second column connecting part. The first screw is connected to the second column connecting part to be axially moved by the second column connecting part.

5. The synchronous telescopic mechanism according to any one of claims 1-3, characterized in that, the synchronous telescopic mechanism further includes a gearbox. The plurality of driving gears are installed in the gearbox. The driving gears further include a third driving gear. A connecting piece for connecting with a third telescopic column section of the steering column is provided on the gearbox. The connecting parts further include a fixed connecting part for being relatively fixedly arranged with a fixed column of the steering column. The driving screws further include a third screw, which is in threaded cooperation with the third driving gear and is axially fixed and relatively rotatably connected to the fixed connecting part.

6. The synchronous telescopic mechanism according to claim 5, characterized in that, the fixed connecting part and the first column connecting part are axially located on both sides of the gearbox, and the rotation direction of the third driving gear is opposite to that of the first driving gear.

7. The synchronous telescopic mechanism according to any one of claims 1-3, It is characterized in that the synchronous telescoping mechanism further includes a power input gear for driving connection with the motor. The plurality of driving gears include a first driving gear, a second driving gear and a third driving gear. The third driving gear meshes with the power input gear. The first driving gear and the second driving gear are respectively located on opposite sides of the third driving gear and respectively mesh with the third driving gear.

8. The synchronous telescoping mechanism according to claim 7, It is characterized in that the power input gear includes a driving gear for coaxial connection with the motor and a reduction gear meshing with the driving gear.

9. The synchronous telescoping mechanism according to claim 8, It is characterized in that the driving gear and the reduction gear are arranged in a row. The first driving gear, the second driving gear and the third driving gear are arranged in a row. The plurality of driving gears arranged in a row and the power input gear are arranged in a T shape.

10. The synchronous telescoping mechanism according to claim 9, It is characterized in that the synchronous telescoping mechanism further includes a gearbox. The plurality of driving gears are installed in the gearbox. The gearbox has a power output part and a power input part forming a T shape. The power input part protrudes from the middle of the power output part. The power input gear is arranged in the power input part. The plurality of driving gears are arranged in a row in the power output part.

11. The synchronous telescoping mechanism according to claim 1, It is characterized in that the connecting part includes a pipe column connecting part. The pipe column connecting part includes a nut seat threadedly engaged with the corresponding driving screw and a connecting seat extending from the nut seat to the side wall of the steering column. At least part of the connecting seat is formed as a sliding structure for slidably passing through the guiding groove of the steering column and driving the steering column to telescopically move synchronously.

12. A steering column assembly, It is characterized in that comprising: a steering column including a plurality of pipe columns that are sequentially sleeved from the outside to the inside and can telescopically move along the axial direction. The plurality of pipe columns include a fixed pipe column located on the outermost side, a connecting pipe column located on the innermost side, and a telescopic pipe column located between the fixed pipe column and the connecting pipe column. The connecting pipe column is used for connecting with a vehicle steering wheel; a motor, and the synchronous telescoping mechanism according to any one of claims 1-11. The motor is in driving connection with the driving gear. The synchronous telescoping mechanism is used for connecting with the telescopic pipe column to drive the steering column to telescopically move synchronously.

13. The steering column assembly according to claim 12, It is characterized in that a first guiding groove penetrating the wall surface is axially formed on the outer wall surface of the fixed pipe column. A second guiding groove penetrating the wall surface is also axially formed on the outer wall surface of each telescopic pipe column. The connecting part includes a sliding structure correspondingly passing through the first guiding groove or sequentially passing through the first guiding groove and the corresponding second guiding groove.

14. A vehicle, It is characterized in that comprises the steering column assembly according to claim 12 or 13.

15. A screw for a telescoping mechanism, It is characterized in that It includes a first rod section and a second rod section arranged axially. The first rod section is configured as a sliding rod structure with a non-circular cross-section, and the second rod section is a screw rod structure. The sliding rod structure is used for circumferentially locking and axially movably cooperating with the rotary driving part, and the screw rod structure is used for threadedly cooperating with the connecting part.

16. The screw rod according to claim 15, wherein, the screw rod further includes a mounting rod section located between the first rod section and the second rod section. The mounting rod section includes a cylindrical main body and a radial flange formed on the outer circumferential surface of the cylindrical main body.

17. A telescopic mechanism, wherein, it includes: a rotary driving part; a driving screw rod, which is synchronously rotationally connected with the rotary driving part; and a connecting part, which is threadedly engaged with the driving screw rod and is used for connecting an external telescopic member; wherein, the driving screw rod is configured to be driven to rotate by the rotary driving part and can also axially move relative to the rotary driving part.

18. The telescopic mechanism according to claim 17, wherein, the driving screw rod includes a first rod section and a second rod section. The first rod section is configured as a sliding rod structure with a non-circular cross-section, and the second rod section is a screw rod structure. The sliding rod structure is used for circumferentially locking and axially movably cooperating with the rotary driving part, and the screw rod structure is used for threadedly cooperating with the connecting part.

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