Large-stroke four-direction adjusting steering column and vehicle

Abstract

The large-stroke four-direction adjusting steering column comprises an upper column body, a lower column body and a mounting support located on the lower side of the lower column body, the upper column body is connected to the upper portion of the outer side wall of the lower column body in a sleeving mode and can move in the axial direction of the lower column body, and a connecting frame is fixedly connected to the bottom of the lower column body and can move in the axial direction of the lower column body. A height adjusting plate is hinged to the outer side of the upper tubular column, a locking pin is horizontally arranged at the position, corresponding to the height adjusting plate, of the connecting frame, an angle adjusting plate is hinged to the mounting support, and the lower portion of the height adjusting plate and the upper portion of the angle adjusting plate are both connected to the locking pin in a sleeved mode. The locking pin can move relative to the height adjusting plate and the angle adjusting plate in the corresponding length direction, and the height adjusting plate and the angle adjusting plate can be locked on the locking pin through a locking mechanism. The steering wheel has the beneficial effects that the adjustable stroke of the steering wheel is increased, meanwhile, it can be ensured that small space is occupied, and the driving experience feeling is improved.

Description

Technical Field

[0001] This invention belongs to the field of steering column technology, and in particular relates to a long-stroke four-way adjustable steering column and vehicle. Background Technology

[0002] During vehicle driving, the steering wheel, as the core control component for interaction between the driver and the vehicle, directly affects driving comfort, ease of operation, and driving safety. To accommodate the driving habits and physical needs of drivers of different heights and builds, most mainstream vehicles currently employ a four-way adjustment mechanism based on the steering column to adjust the steering wheel position. This mechanism primarily allows for adjustment of the steering wheel's angle and height to meet the driver's personalized driving posture requirements. Currently, conventional four-way adjustable mechanisms in the industry have significant limitations in performance parameters. Their angle adjustment range is typically only maintained between 3-5°, and the height adjustment range is limited to ±20mm. From a practical application perspective, such adjustment angles and travels are relatively small, making it difficult to fully adapt to the diverse driving groups, especially for taller or shorter drivers. They often cannot find the most comfortable driving position, and prolonged driving can easily lead to fatigue in the lower back and shoulder muscles, which not only affects the driving experience but may also increase driving safety hazards due to driver inattention. This problem is even more pronounced in the field of special-purpose vehicles. Special-purpose vehicles, designed for specific tasks such as emergency rescue vehicles, must prioritize functional requirements like equipment installation and mission execution in their cab design, resulting in a significantly smaller usable space inside the cab compared to ordinary civilian vehicles. Within this limited space, existing four-way adjustment mechanisms, with their short adjustment stroke and small adjustment angle, further restrict the driver's ability to adjust the steering wheel position. Even with maximum adjustment, it's difficult to find an ergonomic driving posture, severely impacting the driver's operational flexibility and physical comfort during extended work periods or emergency missions, thus negatively affecting the vehicle's operational efficiency and driving safety. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the shortcomings of the above-mentioned problems in the prior art and proposes a long-stroke four-way adjustable steering column and vehicle.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows: The first aspect of the present invention provides a long-stroke four-way adjustable steering column, including an upper column, a lower column, and a mounting bracket located on the lower side of the lower column. The upper column is sleeved on the upper part of the outer side wall of the lower column and can move axially along the lower column. A connecting frame is fixedly connected to the bottom of the lower column and is hinged in the mounting bracket. A height adjustment plate is hinged to the outer side of the upper column. A locking pin is horizontally provided on the connecting frame at the corresponding position of the height adjustment plate. An angle adjustment plate is hinged to the mounting bracket. The lower part of the height adjustment plate and the upper part of the angle adjustment plate are both sleeved on the locking pin. The locking pin can move relative to the height adjustment plate and the angle adjustment plate in the corresponding length direction, and the height adjustment plate and the angle adjustment plate can be locked on the locking pin by a locking mechanism.

[0005] Furthermore, a strip-shaped protrusion is provided on the outer side wall of the lower pipe column along its length, and a groove is provided on the inner side wall of the upper pipe column corresponding to the strip-shaped protrusion. The upper pipe column is sleeved on the outer side of the lower pipe column, and the strip-shaped protrusion is slidably engaged in the groove. A dust cover is sleeved between the lower side of the upper pipe column and the lower side of the lower pipe column, and the upper end of the dust cover is fixed to the lower side of the upper pipe column by a clamp, and the lower end is fixed to the lower side of the lower pipe column by a clamp.

[0006] Furthermore, the left and right side walls of the connecting frame are rotatably connected to the left and right side plates of the mounting bracket through a rotating joint.

[0007] Furthermore, two opposing first ear plates are vertically fixed to the rear side of the upper tube column. A first connecting hole is provided on the upper side of the height adjustment plate. A connecting shaft is fixed between the two first ear plates. The height adjustment plate is located between the two first ear plates and is movably sleeved on the connecting shaft through the first connecting hole.

[0008] Furthermore, two opposing second ear plates are vertically fixed to the rear side wall of the connecting frame, and a locking pin is connected between the two second ear plates. A rotating rod located below the locking pin is horizontally connected between the left and right side plates of the mounting bracket. The lower side of the angle adjustment plate is sleeved on the rotating rod, and a first strip hole is opened in the upper part along the length direction. A second strip hole is opened in the lower part of the height adjustment plate along the length direction. The locking pin is set through the first strip hole and the second strip hole.

[0009] Furthermore, reset springs are connected between the left and right side plates of the mounting bracket and the corresponding second ear plates.

[0010] Furthermore, there are multiple angle adjustment plates, evenly distributed on the left and right sides of the height adjustment plate. The locking mechanism includes a first washer, a pressing block, a stop tooth pair, a handle, and a planar thrust bearing, all connected to the locking pin. A first washer is provided between each pair of adjacent angle adjustment plates, between an angle adjustment plate and a height adjustment plate, and between the second ear plate on the side away from the locking pin and an adjacent angle adjustment plate. An annular pressing block is provided between the second ear plate on the side facing the end cap and an adjacent angle adjustment plate. The handle is located on the outside of the second ear plate on the side away from the end cap. The stop tooth pair includes two cooperating stop teeth, and the stop tooth pair is located between the handle and the second ear plate on the side away from the end cap. The corresponding stop teeth and the second ear plate are engaged together, the handle and the corresponding stop teeth are engaged together, and the two stop teeth are clearance-fitted with the locking pin. The planar thrust bearing is close to the outside of the handle, and a locking nut close to the outside of the planar thrust bearing is fixed at the end of the locking pin. The end cap of the locking pin has an inverted U-shaped structure and includes a pressing part and a limiting part located outside the pressing part. The cross-sectional size of the pressing part is smaller than that of the limiting part. A first through hole is opened on the second ear plate near the end cap at the corresponding pressing part. The end of the pressing part away from the limiting part can pass through the first through hole and can be pressed against the pressing block. The limiting part is located outside the first through hole.

[0011] Furthermore, a second connecting hole is provided on the lower side of the angle adjustment plate, which is sleeved on the rotating rod through the second connecting hole. A second shim is provided between two adjacent angle adjustment plates, between the angle adjustment plate and the height adjustment plate, and between the outermost angle adjustment plate and the mounting bracket, and is sleeved on the rotating rod.

[0012] Furthermore, the upper part of the height adjustment plate is a first arc-shaped part that is recessed backward, and the lower part is a second arc-shaped part that is recessed forward. The second strip-shaped hole is provided on the second arc-shaped part and is arranged in an arc-shaped structure.

[0013] A second aspect of the present invention provides a vehicle including the aforementioned long-stroke four-way adjustable steering column.

[0014] Compared with the prior art, the present invention has the following advantages: The long-stroke four-way adjustable steering column of this invention uses independent height adjustment plates and angle adjustment plates to adjust the height and angle of the steering wheel. This creates a stable triangular structure between the height adjustment plates, angle adjustment plates, and the upper and lower columns, increasing the adjustable stroke of the steering wheel while minimizing space usage. This provides the driver with more steering wheel adjustment position options, improves the driving experience, and meets the steering wheel position requirements of different groups. It can be used in ordinary passenger cars, all-terrain vehicles, and other special vehicles that require four-way adjustment. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the long-stroke four-way adjustable steering column structure described in Embodiment 1 of the present invention; Figure 2 This is an exploded view of the locking mechanism described in Embodiment 1 of the present invention on a long-stroke four-way adjustable steering column; Figure 3 This is a top view of the long-stroke four-way adjustable steering column described in Embodiment 1 of the present invention; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 This is an exploded view of the connection structure between the upper and lower tubular columns as described in Embodiment 1 of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Upper tube column; 101. First ear plate; 2. Lower tube column; 201. Connecting bracket; 2011. Second ear plate; 2012. Connecting block; 2013. Mounting boss; 202. Strip-shaped flange; 3. Mounting bracket; 301. Side plate; 302. Connecting edge; 303. Support block; 4. Locking pin; 401. Limiting part; 402. Pressing part; 5. Rotating rod; 6. Rotating pair; 7. Height adjusting plate; 701 702. First arc-shaped part; 703. Second arc-shaped part; 704. Second strip hole; 8. Angle adjustment plate; 805. First strip hole; 9. Handle; 10. Stop tooth; 1006. Limiting block; 11. Planar thrust bearing; 12. Locking nut; 13. Connecting shaft; 14. Return spring; 15. First washer; 16. Pressing block; 17. Second washer; 18. Input shaft; 19. Dust cover; 20. Clamp. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Example 1 like Figures 1 to 5As shown, a long-stroke four-way adjustable steering column includes an upper column sub-assembly, a lower column sub-assembly, and a mounting bracket 3 located below the lower column sub-assembly. The upper column 1 of the upper column sub-assembly is sleeved on the upper outer wall of the lower column 2 of the lower column sub-assembly and can move axially along the lower column 2. A connecting frame 201 is fixedly connected to the bottom of the lower column 2 and is hinged in the mounting bracket 3. A height adjustment plate 7 is hinged to the outer side of the upper column 1. A locking pin 4 is horizontally provided on the connecting frame 201 corresponding to the height adjustment plate 7. An angle adjustment plate 8 is hinged to the mounting bracket 3. The lower part of the height adjustment plate 7 and the upper part of the angle adjustment plate 8 are both sleeved on the locking pin 4. The locking pin 4 can move relative to the height adjustment plate 7 and the angle adjustment plate 8 in the corresponding length direction, and the height adjustment plate 7 and the angle adjustment plate 8 can be locked on the locking pin 4 by a locking mechanism. In this embodiment, both the upper and lower column subassemblies are conventional components of a vehicle steering column. The upper column subassembly includes an upper column 1 and an input shaft 18, while the lower column subassembly includes a lower column 2 and a lower steering shaft. The input shaft 18 is located inside the upper column 1, with its upper end extending out of the upper column 1 and its lower end extending into the lower column 2. It is connected to the lower steering shaft inside the lower column 2 via a spline. The upper end of the input shaft 18 is connected to the steering wheel, and different EPS (Electric Power Steering) devices can be installed at the end of the lower steering shaft to accommodate different vehicle models. This invention only improves the connection relationship between the upper column 1 and the lower column 2, and the structure for adjusting the height and angle of the upper column 1. It does not improve the internal connection structure of the upper column 1 and the lower column 2. Therefore, the specific structure of the internal components of the upper and lower column subassemblies will not be described in detail here.

[0022] A strip-shaped protrusion 202 is provided along the length of the outer wall of the lower tube column 2. A groove is provided on the inner wall of the upper tube column 1 at the corresponding position of the strip-shaped protrusion 202. The upper tube column 1 is sleeved on the outer side of the lower tube column 2, and the strip-shaped protrusion 202 is slidably engaged in the groove. In this embodiment, there are multiple strip-shaped protrusions 202, evenly distributed on the outer wall of the lower tube column 2, and the groove is provided one-to-one with each strip-shaped protrusion 202. A dust cover 19 is sleeved between the lower side of the upper tube column 1 and the lower side of the lower tube column 2. The upper end of the dust cover 19 is fixed to the lower side of the upper tube column 1 by a clamp 20, and the lower end is fixed to the lower side of the lower tube column 2 by a clamp 20. In this embodiment, by setting the corrugated tubular structure of the dust cover 19, the position where relative movement can occur between the upper tube column 1 and the lower tube column 2 is sealed, thereby achieving the effect of dustproof and waterproof.

[0023] The left and right side walls of the connecting frame 201 are rotatably connected to the left and right side plates 301 of the mounting bracket 3 via a rotating joint 6. In this embodiment, the connecting frame 201 is a cover structure with openings on both the front and bottom sides. The mounting bracket 3 includes two side plates 301 arranged opposite each other on the left and right sides, with a connecting plate between the front sides of the two side plates 301. Each side plate 301 has a horizontal connecting edge 302 extending outward from its bottom, and the connecting edge 302 is fixed to the frame by multiple bolts. In this embodiment, the rotating joint 6 includes a pin. The left and right side walls of the connecting frame 201 are interference-fitted with the pin through mounting holes. The left and right side plates 301 of the mounting bracket 3 are connected to the corresponding pins via bearings, realizing the rotatable connection of the connecting frame 201 between the left and right side plates 301 of the mounting bracket 3.

[0024] Two opposing first ear plates 101 are vertically fixed to the rear side of the upper tube column 1. A first connecting hole is provided on the upper side of the height adjustment plate 7. A connecting shaft 13 is fixed between the two first ear plates 101. The height adjustment plate 7 is located between the two first ear plates 101 and is movably sleeved on the connecting shaft 13 through the first connecting hole, realizing the rotatable connection between the upper side of the height adjustment plate 7 and the first ear plates 101. In this embodiment, the connecting shaft 13 can be a bolt and nut pair.

[0025] Two opposing second ear plates 2011 are vertically fixed to the rear side wall of the connecting frame 201. A locking pin 4 is connected between the two second ear plates 2011. A rotating rod 5 located below the locking pin 4 is horizontally connected between the left and right side plates 301 of the mounting bracket 3. The lower side of the angle adjusting plate 8 is sleeved on the rotating rod 5. A first strip-shaped hole 801 is opened in the upper part along the length direction. A second strip-shaped hole 703 is opened in the lower part along the length direction. The locking pin 4 is set through the first strip-shaped hole 801 and the second strip-shaped hole 703. In this embodiment, the angle adjusting plate 8 is a strip-shaped straight plate structure. In this embodiment, the rotating rod 5 is connected between the left and right side plates 301 of the mounting bracket 3 by a nut.

[0026] A return spring 14 is connected between the left and right side plates 301 and the corresponding second ear plates 2011 of the mounting bracket 3. In this embodiment, the return spring 14 is a torsion spring. A connecting block 2012 with a first through hole is provided at the bottom of each second ear plate 2011. A columnar support block 303 is fixed to the inner side of the left and right side plates 301 of the mounting bracket 3. A second through hole is opened on the left and right side plates 301 of the mounting bracket 3. The torsion spring is sleeved on the corresponding support block 303, with one end inserted into the corresponding first through hole and the other end inserted into the corresponding second through hole.

[0027] There are multiple angle adjustment plates 8, evenly distributed on the left and right sides of the height adjustment plate 7. The locking mechanism includes a first washer 15, a pressing block 16, a toothed pair, a handle 9, and a planar thrust bearing 11, all connected to the locking pin 4. A first washer 15 is provided between each pair of adjacent angle adjustment plates 8, between the angle adjustment plate 8 and the height adjustment plate 7, and between the second ear plate 2011 on the end cap side away from the locking pin 4 and the adjacent angle adjustment plate 8. An annular pressing block 16 is provided between the second ear plate 2011 facing the end cap side and the adjacent angle adjustment plate 8. The handle 9 is located on the outside of the second ear plate 2011 on the side away from the end cap. The toothed pair includes two cooperating teeth 10, which are located between the handle 9 and the second ear plate 2011 on the side away from the end cap. The handle 9 and the corresponding stop teeth 10 are engaged together, and the two stop teeth 10 are fitted with the locking pin 4 with a clearance. The planar thrust bearing 11 is attached to the outside of the handle 9, and a locking nut 12 is fixed to the end of the locking pin 4 and attached to the outside of the planar thrust bearing 11. The end cap of the locking pin 4 has an inverted U-shaped structure and includes a pressing part 402 and a limiting part 401 located outside the pressing part 402. The cross-sectional size of the pressing part 402 is smaller than that of the limiting part 401. A first through hole is provided on the second ear plate 2011 near the end cap, corresponding to the pressing part 402. The end of the pressing part 402 away from the limiting part 401 can pass through the first through hole and can be pressed against the pressing block 16. The limiting part 401 is located outside the first through hole. In this embodiment, the inner wall of the second ear plate 2011 near the end cap is provided with a first limiting groove communicating with the first through hole, and the pressing block 16 is embedded in the first limiting groove. The outer side of the second ear plate 2011 near the stop tooth 10 is provided with an integrally formed mounting boss 2013 corresponding to the corresponding stop tooth 10. A second through hole is provided on the second ear plate 2011 through the mounting boss 2013. A square second limiting groove communicating with the second through hole is provided on the outer side of the mounting boss 2013. A square limiting block 1001 is provided on the outer side of each stop tooth 10. The outer side of the mounting boss 2013 and the corresponding stop tooth 10 abut together, and the limiting block 1001 of the corresponding stop tooth 10 is engaged in the second limiting groove. A square limiting hole is provided on the handle 9 corresponding to the limiting block 1001 of the corresponding stop tooth 10, and the limiting block 1001 of the corresponding stop tooth 10 is engaged in the limiting hole. In this embodiment, the stop gear is a common part in the automotive manufacturing industry. It is used in conjunction with the handle 9 to lock or release the gear. This is a conventional technical means that can be mastered by those skilled in the art, and its structure has not been improved here. Therefore, its specific structure will not be described in detail here.In this embodiment, the locking pin 4 passes through the first through hole, the first limiting groove, the second through hole, and the second limiting groove in sequence. When the handle 9 is rotated to one side, the handle 9 drives the corresponding stop teeth 10 to rotate synchronously, causing the two stop teeth 10 to move relative to each other and gradually move away from a certain gap. At this time, the locking member is subjected to a pulling force in the direction of the end. The pressing part 402 of the locking pin 4 squeezes the pressing block 16, the first gasket 15, the height adjusting plate 7, and the angle adjusting plate 8 together, thereby achieving the positioning of the height adjusting plate 7 and the angle adjusting plate 8, and thus the positioning of the upper column 1, and finally positioning the height and angle of the steering wheel. When the handle 9 is rotated in the opposite direction, the handle 9 drives the corresponding stop teeth 10 to rotate synchronously, causing the two stop teeth 10 to move relative to each other and gradually squeeze together. At this time, the pulling force on the locking member in the direction of the end dissipates, and the squeezing of the pressing block 16, the first gasket 15, the height adjusting plate 7, and the angle adjusting plate 8 is lost. The height and angle of the upper column 1 can then be moved to achieve the adjustment of the height and angle of the steering wheel.

[0028] A second connecting hole is provided on the lower side of the angle adjustment plate 8, through which it is sleeved onto the rotating rod 5. Second shims 17 are provided between adjacent angle adjustment plates 8, between the angle adjustment plate 8 and the height adjustment plate 7, and between the outermost angle adjustment plate 8 and the mounting bracket 3, all sleeved onto the rotating rod 5. In this embodiment, the second shims 17 can be a sheet-like structure or a tubular structure, depending on the width of the location where they are used, and are made of cold-rolled carbon steel plate. The second shims 17, in conjunction with the first shim 15, ensure that the height adjustment plate 7 and the angle adjustment plate 8 are in a parallel state, preventing them from shifting when the handle 9 is rotated.

[0029] The height adjustment plate 7 has a first arc-shaped portion 701 that is recessed rearward at the top and a second arc-shaped portion 702 that is recessed forward at the bottom. A second strip-shaped hole 703 is provided on the second arc-shaped portion 702 and is arranged in an arc-shaped structure. This arrangement can effectively reduce the space occupied by the height adjustment plate 7 when adjusting the direction, providing more space for the driver's leg movement in the cockpit.

[0030] The working process of this embodiment is as follows: When the steering wheel height needs to be adjusted, turn the handle 9 backward to drive the corresponding stop teeth 10 to rotate synchronously, so that the two stop teeth 10 come closer to each other. Under the action of the inclined surface of the stop teeth 10, the two stop teeth 10 are gradually squeezed together. At this time, the tension on the locking part in the direction towards the end is released, and the compression of the compression block 16, the first shim 15, the height adjustment plate 7, and the angle adjustment plate 8 is lost. At this time, the locking mechanism is in a relaxed state. Then, the steering wheel position can be moved up and down to adjust the steering wheel height. When the steering wheel tilt angle needs to be adjusted, when the locking mechanism is in a relaxed state, the required tilting force is directly applied to the steering wheel. Under the cooperation of the locking pin 4 and the second strip hole 703 of the height adjustment plate 7 and the first strip hole 801 of the angle adjustment plate 8, the upper column 1, the lower column 2, and the connecting bracket 201 rotate together along the rotating joint 6, thereby adjusting the tilt angle of the steering wheel.

[0031] After adjustment, turn the handle 9 forward and backward to drive the corresponding stop teeth 10 to rotate synchronously, so that the two stop teeth 10 separate and gradually move away from each other by a certain gap. At this time, the locking part is subjected to a pulling force in the direction of the end. The pressing part 402 of the locking pin 4 squeezes the pressing block 16, the first gasket 15, the height adjusting plate 7, and the angle adjusting plate 8 together to achieve the positioning of the height adjusting plate 7 and the angle adjusting plate 8, thereby achieving the positioning of the upper column 1 and the lower column 2, and finally positioning the height and angle of the steering wheel.

[0032] Example 2 A vehicle comprising the long-stroke four-way adjustable steering column as described in Embodiment 1.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A long-stroke four-way adjustable steering column, characterized in that: It includes an upper tube column, a lower tube column, and a mounting bracket located below the lower tube column. The upper tube column is sleeved on the upper part of the outer wall of the lower tube column and can move axially along the lower tube column. A connecting frame is fixedly connected to the bottom of the lower tube column. The connecting frame is hinged in the mounting bracket. A height adjustment plate is hinged to the outer side of the upper tube column. A locking pin is horizontally provided on the connecting frame at the corresponding height adjustment plate. An angle adjustment plate is hinged to the mounting bracket. The lower part of the height adjustment plate and the upper part of the angle adjustment plate are both sleeved on the locking pin. The locking pin can move relative to the height adjustment plate and the angle adjustment plate in the corresponding length direction, and the height adjustment plate and the angle adjustment plate can be locked on the locking pin by a locking mechanism.

2. The long-stroke four-way adjustable steering column according to claim 1, characterized in that: The lower pipe column has a strip-shaped protrusion along its length on the outer side wall, and a groove is provided on the inner side wall of the upper pipe column corresponding to the strip-shaped protrusion. The upper pipe column is sleeved on the outer side of the lower pipe column, and the strip-shaped protrusion is slidably engaged in the groove. A dust cover is sleeved between the lower side of the upper pipe column and the lower side of the lower pipe column, and the upper end of the dust cover is fixed to the lower side of the upper pipe column by a clamp, and the lower end is fixed to the lower side of the lower pipe column by a clamp.

3. The long-stroke four-way adjustable steering column according to claim 1, characterized in that: The left and right side walls of the connecting frame are rotatably connected to the left and right side plates of the mounting bracket through a rotating joint.

4. The long-stroke four-way adjustable steering column according to claim 1, characterized in that: Two opposing first ear plates are vertically fixed to the rear side of the upper tube column. A first connecting hole is opened on the upper side of the height adjustment plate. A connecting shaft is fixed between the two first ear plates. The height adjustment plate is located between the two first ear plates and is movably sleeved on the connecting shaft through the first connecting hole.

5. A long-stroke four-way adjustable steering column according to claim 1, characterized in that: Two opposing second ear plates are vertically fixed to the rear side wall of the connecting frame. A locking pin is connected between the two second ear plates. A rotating rod located below the locking pin is horizontally connected between the left and right side plates of the mounting bracket. The lower side of the angle adjustment plate is sleeved on the rotating rod. A first strip hole is opened in the upper part along the length direction. A second strip hole is opened in the lower part along the length direction. The locking pin is set through the first strip hole and the second strip hole.

6. A long-stroke four-way adjustable steering column according to claim 5, characterized in that: Return springs are connected between the left and right side plates of the mounting bracket and the corresponding second ear plates.

7. A long-stroke four-way adjustable steering column according to claim 5, characterized in that: There are multiple angle adjustment plates, evenly distributed on the left and right sides of the height adjustment plate. The locking mechanism includes a first washer, a pressing block, a stop tooth pair, a handle, and a planar thrust bearing, all connected to the locking pin. A first washer is provided between each pair of adjacent angle adjustment plates, between an angle adjustment plate and a height adjustment plate, and between the second ear plate on the side away from the locking pin and an adjacent angle adjustment plate. An annular pressing block is provided between the second ear plate on the side facing the end cap and an adjacent angle adjustment plate. The handle is located on the outside of the second ear plate on the side away from the end cap. The stop tooth pair includes two cooperating stop teeth and is located between the handle and the second ear plate on the side away from the end cap. The corresponding stop teeth and the second ear plate are engaged together, the handle and the corresponding stop teeth are engaged together, and the two stop teeth are clearance-fitted with the locking pin. The planar thrust bearing is close to the outside of the handle, and a locking nut close to the outside of the planar thrust bearing is fixed at the end of the locking pin. The end cap of the locking pin has an inverted U-shaped structure and includes a pressing part and a limiting part located outside the pressing part. The cross-sectional size of the pressing part is smaller than that of the limiting part. A first through hole is opened on the second ear plate near the end cap at the corresponding pressing part. The end of the pressing part away from the limiting part can pass through the first through hole and can be pressed against the pressing block. The limiting part is located outside the first through hole.

8. A long-stroke four-way adjustable steering column according to claim 7, characterized in that: A second connecting hole is provided on the lower side of the angle adjustment plate, and it is sleeved on the rotating rod through the second connecting hole. A second shim is provided between two adjacent angle adjustment plates, between the angle adjustment plate and the height adjustment plate, and between the outermost angle adjustment plate and the mounting bracket, and is sleeved on the rotating rod.

9. A long-stroke four-way adjustable steering column according to claim 1, characterized in that: The upper part of the height adjustment plate is a first arc-shaped part that is recessed backward, and the lower part is a second arc-shaped part that is recessed forward. The second strip hole is set on the second arc-shaped part and is arranged in an arc-shaped structure.

10. A vehicle, characterized in that: Includes the long-stroke four-way adjustable steering column as described in any one of claims 1-9.

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