Long stroke electrically adjustable steer-by-wire device

Abstract

This invention provides a long-stroke electrically adjustable steer-by-wire device, comprising: a long-stroke telescopic mechanism mounted on the outer wall of an outer sleeve, the long-stroke telescopic mechanism having a movable part connected to a steering wheel fixing shaft, which drives the steering wheel fixing shaft to retract into or extend out of the outer sleeve; one end of the steering wheel fixing shaft is sleeved with a post mounted on a road feel simulation motor, the post being located inside the outer sleeve; an angle adjustment mechanism mounted at the bottom end of the outer sleeve; and a drive mechanism, the input ends of both the long-stroke telescopic mechanism and the angle adjustment mechanism being connected to the drive mechanism. Through the design of the long-stroke telescopic mechanism and the angle adjustment mechanism, in autonomous driving mode, the long-stroke telescopic mechanism is used for the telescopic adjustment of the steering wheel fixing shaft, allowing the steering wheel mounted on the steering wheel fixing shaft to be retracted and hidden, providing the front driver with 360° free rotation space for the seat.

Description

Technical Field

[0001] This invention relates to a long-stroke electrically adjustable steering-by-wire device. Background Technology

[0002] Autonomous vehicles are intelligent cars that use onboard sensor systems to perceive the road environment, automatically plan driving routes, and control the vehicle to reach predetermined destinations. Autonomous vehicles typically have multiple driving functions that can be switched between automatic and manual driving.

[0003] Currently, in order to provide manual driving steering control, the instrument panel of autonomous vehicles still needs to be designed with a steering device and a steering wheel. Existing steering devices have steer-by-wire designs, such as the existing patent document "CN104015781B Automotive Steer-by-Wire Device with Flexible Redundancy Mechanism". Although it can achieve steer-by-wire, the above-mentioned traditional steering system still occupies the space of the instrument panel and cannot provide the driver in the front row with 360° free rotation space in autonomous driving mode. Summary of the Invention

[0004] In order to solve the technical problem that the steering wheel occupies the space of the dashboard in autonomous driving mode, thus making it impossible to provide the driver in the front row with a 360° free rotation space, this invention provides a long-stroke electric adjustable steer-by-wire device.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0006] This invention provides a long-stroke electrically adjustable steer-by-wire device, including a steering wheel fixed shaft, an outer sleeve, and a road feel simulation motor; it also includes: a long-stroke telescopic mechanism, which is mounted on the outer wall of the outer sleeve and has a movable part connected to the steering wheel fixed shaft, driving the steering wheel fixed shaft to retract into or extend out of the outer sleeve; one end of the steering wheel fixed shaft is sleeved with a post mounted on the road feel simulation motor, and the post is located inside the outer sleeve; an angle adjustment mechanism, which is mounted at the bottom end of the outer sleeve; and a drive mechanism, the input ends of the long-stroke telescopic mechanism and the angle adjustment mechanism are both connected to the drive mechanism. After the steering wheel fixed shaft extends out of the outer sleeve, the drive mechanism can switch between driving the long-stroke telescopic mechanism or the angle adjustment mechanism.

[0007] Preferably, the movable part of the long-stroke telescopic mechanism includes a movable seat, a connecting frame, a long strip cover, and a movable cylinder. A side groove is formed along the length of the side wall of the outer sleeve. The long strip cover covers the side groove, and both ends of the long strip cover are fixedly connected to the outer wall of the outer sleeve. A guide groove is formed between the long strip cover and the outer wall of the outer sleeve. The connecting frame is slidably connected to the guide groove, and both ends of the connecting frame are located inside and outside the outer sleeve, respectively. The end of the connecting frame inside the outer sleeve is fixedly connected to the bottom end of the movable cylinder, and the end of the connecting frame outside the outer sleeve is connected to the movable seat. The movable cylinder is sleeved on the steering wheel fixing shaft, and the movable cylinder is rotatably mounted between the steering wheel fixing shaft and the steering wheel fixing shaft.

[0008] Preferably, a plurality of contact pieces arranged in a ring array are fixedly installed at the bottom end of the movable cylinder, and the contact pieces are in close contact with the inner wall of the outer sleeve.

[0009] Preferably, the long-stroke telescopic mechanism further includes a threaded tube and an upper frame. The upper frame is fixedly connected to the top side wall of the outer sleeve, and an electric disk is fixedly fitted into the lower part of the upper frame. The top end of the threaded tube is rotatably installed with the upper frame. The threaded tube is connected to the movable seat, and a stop plate is provided at the top end of the threaded tube.

[0010] Preferably, the movable seat includes an inner sleeve and an outer sleeve; the inner sleeve is fitted onto the outer wall of the threaded pipe and is threadedly connected to the threaded pipe; the outer sleeve is fixedly connected to the connecting frame; a through hole is formed in the middle of the outer sleeve; the inner sleeve is fitted into the through hole with a clearance fit; a receiving guide groove is formed on both sides of the through hole; a chamfered block is fitted into the receiving guide groove with a clearance fit; a first spring is also provided in the receiving guide groove; one end of the chamfered block is elastically connected to the inner wall of the receiving guide groove through the first spring; an annular groove is formed on the side wall of the inner sleeve; at least one stop bar is fixedly installed inside the annular groove; one end of the chamfered block is embedded in the annular groove; a spacer cavity is formed between the lower part of the inner sleeve and the wall of the through hole; an elastic connector is provided in the spacer cavity; the outer sleeve is made of iron.

[0011] Preferably, the elastic connector includes at least one second spring, an outer ring sleeve, and an inner ring seat. The inner ring seat is connected to the inside of the outer ring sleeve with a clearance fit. Both the outer ring sleeve and the inner ring seat are circular. The bottom end of the second spring is fixedly connected to the top of the outer ring sleeve, and the top end of the second spring is fixedly connected to the wall of the through hole. The outer ring sleeve and the inner ring sleeve are fixedly sleeved together.

[0012] Preferably, the drive mechanism includes a servo motor and a transmission box; the transmission box is fixedly installed on the outer wall of the outer sleeve, and the transmission box includes a housing, a worm, a worm wheel, and a rotating shaft. The worm is rotatably installed inside the housing, and the servo motor is fixedly installed on one side of the outer wall of the housing. The output shaft end of the servo motor is fixedly connected to one end of the worm. The worm is meshed with the worm wheel, and a connecting pipe is fixedly installed in the middle of the worm wheel. The connecting pipe is rotatably connected to the top of the housing, and the top end of the connecting pipe is fixedly connected to the bottom end of the threaded pipe. The bottom end of the connecting pipe is rotatably connected to a first bevel gear, and the first bevel gear is meshed with a second bevel gear. The second bevel gear is fixedly connected to a rotating shaft, and the rotating shaft is rotatably connected to the side wall of the housing.

[0013] Preferably, the bottom of the first bevel gear is provided with a connecting plug, the connecting plug including a chassis and a plug rod, the chassis is provided with a guide hole, the plug rod is connected to the guide hole with clearance fit, and a fourth spring is sleeved on the plug rod, the plug rod is elastically connected to the chassis through the fourth spring, the bottom surface of the first bevel gear is provided with an annular groove, the top end of the plug rod faces the lower part of the annular groove, and at least one stop block is fixedly installed inside the annular groove.

[0014] Preferably, a square rod is fixedly connected to the top surface of the chassis. The square rod passes through the hole in the middle of the first bevel gear and the interior of the connecting pipe, extending to the upper end of the threaded pipe. A hinge joint is rotatably connected to the top of the square rod, and the hinge joint is made of iron. An inner seat is fixedly installed inside the threaded pipe. A square hole is opened on the inner seat. The square rod is connected to the square hole with a clearance fit. A third spring is provided at the bottom of the inner seat. The square rod is elastically connected to the inner seat through the third spring.

[0015] Preferably, the angle adjustment mechanism includes a mounting base fixedly installed at the bottom end of the outer sleeve and a hinge shaft fixedly installed on the mounting base. One end of the hinge shaft is fixedly connected to a fourth bevel gear, the fourth bevel gear is meshed with a third bevel gear, the third bevel gear is fixedly connected to a connecting shaft, and one end of the connecting shaft is fixedly connected to one end of the rotating shaft.

[0016] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0017] The positive and progressive effects of this invention are as follows:

[0018] The aforementioned long-stroke electric adjustable steer-by-wire device, through the design of a long-stroke telescopic mechanism and an angle adjustment mechanism, allows for the telescopic adjustment of the steering wheel fixed shaft in autonomous driving mode. This enables the steering wheel, mounted on the fixed shaft, to be retracted and hidden, providing the front driver with 360° free rotation space and increasing the range of available space and free operation. In manual driving mode, the long-stroke telescopic mechanism drives the steering wheel to extend, providing a manual control position. It also features an angle adjustment mechanism to adjust the steering wheel angle and meet the needs of different grip angles. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the installation structure of the connecting frame of the present invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the outer sleeve of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the movable seat and the inside of the top of the threaded tube of the present invention.

[0023] Figure 5 For the present invention Figure 4 Enlarged structural diagram of section A in the middle.

[0024] Figure 6 This is a schematic diagram of the internal structure of the housing of the present invention.

[0025] Figure 7 This is a schematic diagram of the shaft mounting structure of the present invention.

[0026] Figure 8 This is a schematic diagram of the connection structure between the transmission box and the hinge shaft of the present invention.

[0027] Figure 9 This is a schematic diagram of the lower part of the first bevel gear of the present invention.

[0028] Figure 10 This is a schematic diagram of the annular groove and the stop block of the present invention.

[0029] Figure 11 This is a schematic diagram of the cross-sectional structure of the steering wheel fixing shaft and the insert of the present invention.

[0030] Figure 12 This is a schematic diagram of the internal structure of the annular groove of the present invention.

[0031] Figure 13 This is a schematic diagram of the external mounting structure of the hinge shaft of the present invention.

[0032] Explanation of reference numerals in the attached figures

[0033] 1. Outer sleeve; 101. Side groove; 2. Road feel simulation motor; 3. Movable cylinder; 301. Contact piece; 4. Steering wheel fixing shaft; 5. Servo motor; 6. Transmission box; 601. Box body; 602. Worm gear; 603. Connecting pipe; 604. Worm wheel; 605. First bevel gear; 6051. Circular groove; 6052. Stop block; 606. Second bevel gear; 607. Rotating shaft; 7. Threaded pipe; 701. Position stop plate; 8. Movable seat; 801. Inner circular sleeve; 802. Outer sleeve; 803. Inclined block; 804. Receiving guide groove; 805. Circular groove; 806. First spring; 807. Spacer cavity; 8 08. Second spring; 809. Outer ring sleeve; 810. Inner ring seat; 9. Connecting frame; 10. Long strip cover; 1001. Guide groove; 11. Upper frame; 12. Mounting seat; 13. Hinge shaft; 14. Inner seat; 15. Square rod; 16. Third spring; 17. Hinge joint; 18. Connecting shaft; 19. Third bevel gear; 20. Fourth bevel gear; 21. Connecting plug; 2101. Chassis; 2102. Guide hole; 2103. Insert rod; 2104. Fourth spring; 22. Insert post; 2201. Guide tooth; 23. Electromagnetic disk; 24. Stop bar; 25. External fixing frame; 26. Friction disc; 27. Braking device. Detailed Implementation

[0034] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0035] like Figure 1-13 As shown, the long-stroke electrically adjustable steer-by-wire device includes a steering wheel fixing shaft 4, an outer sleeve 1, and a road feel simulation motor 2. The top of the steering wheel fixing shaft 4 is used to mount the steering wheel, and the interior of the steering wheel fixing shaft 4 is hollow, forming a hollow cavity. The road feel simulation motor 2 is fixedly mounted at the bottom of the outer sleeve 1, and one end of the road feel simulation motor 2 is connected to a pin 22, so that the pin 22 is located inside the outer sleeve 1; wherein the pin 22 is provided with a ring of guide teeth 2201, such as... Figure 3 and Figure 11 As shown, the insert 22 is a non-circular rod structure. The hollow cavity inside the steering wheel fixing shaft 4 is partially fitted with the guide teeth 2201 on the insert 22. During the process of the steering wheel fixing shaft 4 retracting into or extending out of the outer sleeve 1, the steering wheel fixing shaft 4 can slide along the length of the insert 22, and the two always remain in a sleeved state. When the steering wheel installed on the steering wheel fixing shaft 4 rotates, it can drive the insert 22 to rotate together when the steering wheel is turned, which is transmitted to the road feel simulation motor 2.

[0036] The road feel simulation motor 2 simulates the steering wheel rotation feel of a traditional steering device, and transmits the steering wheel steering signal to the steering gear 2101 of the chassis through the controller connected to the road feel simulation motor 2.

[0037] like Figure 1-2 As shown, it also includes: a long-stroke telescopic mechanism, which is installed on the outer wall of the outer sleeve 1, and the long-stroke telescopic mechanism has a movable part, which is connected to the steering wheel fixing shaft 4, so as to drive the steering wheel fixing shaft 4 to retract into the outer sleeve 1 or extend out of the outer sleeve 1.

[0038] The movable part of the long-stroke telescopic mechanism includes a movable seat 8, a connecting frame 9, a long strip cover 10, and a movable cylinder 3. A side groove 101 is formed along the length of the side wall of the outer sleeve 1. The long strip cover 10 covers the side groove 101, and both ends of the long strip cover 10 are fixed to the outer wall of the outer sleeve 1. A guide groove 1001 is formed between the long strip cover 10 and the outer wall of the outer sleeve 1. The connecting frame 9 is slidably connected to the guide groove 1001 to provide guidance. The two ends of the connecting frame 9 are located inside and outside the outer sleeve 1, respectively. The end of the connecting frame 9 inside the outer sleeve 1 is fixed to the bottom end of the movable cylinder 3, and the end of the connecting frame 9 outside the outer sleeve 1 is connected to the movable seat 8. The long-stroke telescopic mechanism also includes a threaded tube 7 and an upper frame 11. The upper frame 11 is fixedly connected to the top side wall of the outer sleeve 1, and an electric disk 23 is fixedly fitted into the lower part of the upper frame 11. The top of the threaded tube 7 is rotatably installed with the upper frame 11. The threaded tube 7 is connected to the movable seat 8, and a stop plate 701 is provided at the top of the threaded tube 7.

[0039] like Figure 1 and Figure 3 As shown, the movable cylinder 3 is sleeved on the steering wheel fixing shaft 4, and the two are rotatably installed together.

[0040] The drive mechanism provides rotational drive for the threaded tube 7, enabling it to rotate forward or backward. Combined with the guiding action of the connecting frame 9 and the guide groove 1001, it allows the movable seat 8 to move up and down along the length of the outer sleeve 1. When the movable seat 8 moves up and down, the connecting frame 9 drives the movable cylinder 3 to move together, and the steering wheel fixing shaft 4 moves with the movable cylinder 3, thus allowing it to be retracted into or extended out of the outer sleeve 1. Retracting it into the outer sleeve 1 lowers the steering wheel height, allowing it to be hidden and avoiding occupying dashboard space, which is suitable for the car's autonomous driving mode. During manual driving, the steering wheel fixing shaft 4 is extended out of the outer sleeve 1, allowing the steering wheel to extend.

[0041] When used for manual driving, the movable seat 8 moves to the highest position and is blocked by the position stop plate 701; a displacement sensor can be installed on the upper frame 11 to determine whether the movable seat 8 has reached the highest position.

[0042] An angle adjustment mechanism is installed at the bottom end of the outer sleeve 1. The angle adjustment mechanism includes a mounting base 12 fixedly installed at the bottom end of the outer sleeve 1 and a hinge shaft 13 fixedly installed on the mounting base 12. One end of the hinge shaft 13 is fixedly connected to a fourth bevel gear 20, which meshes with a third bevel gear 19. The third bevel gear 19 is fixedly connected to a connecting shaft 18, one end of which is fixedly connected to one end of a rotating shaft 607. The driving mechanism is used to drive the rotating shaft 607 to rotate. Through the meshing transmission between the third bevel gear 19 and the fourth bevel gear 20, the hinge shaft 13 rotates. The hinge shaft 13 is fixedly connected to the mounting base 12 fixedly installed at the bottom end of the outer sleeve 1, thereby causing the outer sleeve 1 to rotate and achieve overall angle adjustment.

[0043] like Figure 13 As shown, in specific implementation, the hinge shaft 13 is rotatably mounted to the external fixing frame 25. One end of the hinge shaft 13 is fixedly connected to a friction disc 26. A braking device 27 is provided on one side of the friction disc 26. After angle adjustment, the braking device 27 presses the friction disc 26, providing braking through friction to maintain the limit after angle adjustment. The braking device 27 can be a hydraulic cylinder driving the brake disc, which presses the friction disc 26 in place. By adjusting the angle, the steering wheel angle can be adjusted to meet different grip angle requirements.

[0044] The input ends of the long-stroke telescopic mechanism and the angle adjustment mechanism are both connected to the drive mechanism. After the steering wheel fixing shaft 4 extends to the outside of the outer sleeve 1, the drive mechanism can switch to drive the long-stroke telescopic mechanism or the angle adjustment mechanism.

[0045] In the above, the long-stroke telescopic mechanism and the angle adjustment mechanism can be driven by a single power source through the drive mechanism, reducing the use of power sources.

[0046] The bottom end of the movable cylinder 3 is fixedly equipped with a plurality of contact pieces 301 arranged in a ring array, and the contact pieces 301 are in contact with the inner wall of the outer sleeve 1. The contact pieces 301 are made of POM plastic, which can effectively absorb the noise generated by friction and also has wear-resistant properties.

[0047] Furthermore, such as Figure 4-5As shown, the movable seat 8 includes an inner sleeve 801 and an outer sleeve 802; the inner sleeve 801 is fitted onto the outer wall of the threaded tube 7 and is threadedly connected to the threaded tube 7; the outer sleeve 802 is fixedly connected to the connecting frame 9; a through hole is provided in the middle of the outer sleeve 802; the inner sleeve 801 is fitted into the through hole with clearance; a receiving guide groove 804 is provided on both sides of the through hole; a chamfered block 803 is connected to the receiving guide groove 804 with clearance; and a third [unclear text - possibly a component or element] is also provided in the receiving guide groove 804. A spring 806 is provided. One end of the inclined block 803 is elastically connected to the inner wall of the receiving guide groove 804 through the first spring 806. An annular groove 805 is provided on the side wall of the inner circular sleeve 801, and at least one stop bar 24 is fixedly installed inside the annular groove 805. One end of the inclined block 803 is embedded in the annular groove 805. An interval cavity 807 is formed between the lower part of the inner circular sleeve 801 and the hole wall of the circular hole. An elastic connector is provided in the interval cavity 807. The outer sleeve 802 is made of iron. The elastic connector includes at least one second spring 808, an outer ring sleeve 809, and an inner ring seat 810. The inner ring seat 810 is connected to the inside of the outer ring sleeve 809 with a clearance fit. Both the outer ring sleeve 809 and the inner ring seat 810 are circular. The bottom end of the second spring 808 is fixedly connected to the top end of the outer ring sleeve 809, and the top end of the second spring 808 is fixedly connected to the wall of the through hole. The outer ring sleeve 809 is fixedly sleeved with the inner circular sleeve 801.

[0048] With the above design, after the movable seat 8 moves to its highest position, the steering wheel extends for manual driving; the top of the inner sleeve 801 is blocked by the stop plate 701, preventing the movable seat 8 from moving further upward; the electric disk 23 generates magnetic attraction when energized, magnetically attracting the outer sleeve 802, which is then connected to the annular groove 805 via the inclined block 803. Figure 4 As shown, the upper part of the inclined block 803 is inclined. When the outer sleeve 802 moves upward under magnetic attraction, the annular groove 805 squeezes the inclined surface of the inclined block 803, causing the inclined block 803 to move into the receiving guide groove 804. At the same time, the first spring 806 is compressed until the outer sleeve 802 contacts the electric disk 23. The inclined block 803 and the annular groove 805 are completely separated, so that the outer sleeve 802 and the inner sleeve 801 are only connected by clearance fit. When the threaded tube 7 rotates, the inner sleeve 801 and the threaded tube 7 rotate together. The inner sleeve 801 is not restricted by the outer sleeve 802. At this time, it cannot provide up and down drive for the movable seat 8.

[0049] When the outer sleeve 802 is magnetically attracted, the outer sleeve 802 moves upward, which pulls the second spring 808, causing the second spring 808 to undergo tensile deformation, which is used to provide elastic force for subsequent reset; the circular design of the outer ring sleeve 809 and the inner circular sleeve 801 in the elastic connector ensures the elastic connection between the inner circular sleeve 801 and the outer sleeve 802, and at the same time, when the two rotate relative to each other, they will not cause obstruction.

[0050] The purpose of the movable seat 8, as described above, is that when the long-stroke telescopic mechanism drives the steering wheel to extend and the electric disk 23 is energized to generate magnetic attraction, and the drive mechanism continues to drive the threaded tube 7 to rotate, the vertical position of the movable seat 8 cannot be changed, so that the long-stroke telescopic mechanism temporarily loses its telescopic drive capability.

[0051] When the power to the magnetic disk 23 is turned off, the outer casing 802 loses its magnetic attraction. Driven downwards by the force of the second spring 808 and gravity, the outer casing 802 continues until the inclined block 803 aligns with the annular groove 805. Driven by the force of the first spring 806, the inclined block 803 is inserted into the annular groove 805. A stop bar 24 is provided in the annular groove 805. When the inclined block 803 is blocked from contacting the stop bar 24, the inner sleeve 801 is rotated to change its position, disengaging the inclined block 803 from the stop bar 24, allowing insertion. After insertion, the inner sleeve 801 rotates, and the stop bar 24 partially contacts and blocks the inclined block 803 inserted into the annular groove 805. The inner sleeve 801 loses its ability to rotate with the threaded tube 7. Therefore, when the threaded tube 7 rotates, it drives the entire movable seat 8 to move up and down, restoring the telescopic drive capability of the long-stroke telescopic mechanism.

[0052] In summary, when the steering wheel is extended for the driver's use, the electric disk 23 is energized, which causes the long-stroke telescopic mechanism to lose its telescopic ability. When the electric disk 23 is de-energized, the long-stroke telescopic mechanism regains its telescopic ability.

[0053] like Figure 6-8As shown, the drive mechanism includes a servo motor 5 and a transmission box 6; the transmission box 6 is fixedly installed on the outer wall of the outer sleeve 1, and the transmission box 6 includes a housing 601, a worm gear 602, a worm wheel 604, and a rotating shaft 607. The worm gear 602 is rotatably installed inside the housing 601, and the servo motor 5 is fixedly installed on one side of the outer wall of the housing 601. The output shaft end of the servo motor 5 is fixedly connected to one end of the worm gear 602, and the worm gear 602 is meshed with a... A worm gear 604 is provided, and a connecting pipe 603 is fixedly installed in the middle of the worm gear 604. The connecting pipe 603 is rotatably connected to the top of the housing 601, and the top end of the connecting pipe 603 is fixedly connected to the bottom end of the threaded pipe 7. A first bevel gear 605 is rotatably connected to the bottom end of the connecting pipe 603. The first bevel gear 605 is meshed with a second bevel gear 606. The second bevel gear 606 is fixedly connected to a rotating shaft 607, and the rotating shaft 607 is rotatably connected to the side wall of the housing 601.

[0054] The servo motor 5 drives the worm gear 602 to rotate, which in turn drives the worm wheel 604 to rotate. The connecting pipe 603 rotates together with the worm wheel 604, which in turn drives the threaded pipe 7 to rotate, thus providing a drive for the long-stroke telescopic mechanism.

[0055] like Figure 4 , Figure 9 as well as Figure 10 As shown, a connecting plug 21 is provided at the bottom of the first bevel gear 605. The connecting plug 21 includes a chassis 2101 and a plug rod 2103. A guide hole 2102 is provided on the chassis 2101. The plug rod 2103 is connected to the guide hole 2102 with a clearance fit. A fourth spring 2104 is sleeved on the plug rod 2103. The plug rod 2103 is elastically connected to the chassis 2101 through the fourth spring 2104. A circular groove 6051 is provided on the bottom surface of the first bevel gear 605. The top end of the plug rod 2103 faces the lower part of the circular groove 6051. A stop block 6052 is fixedly installed inside the circular groove 6051. A square rod 15 is fixedly connected to the top surface of the chassis 2101. The square rod 15 passes through the hole in the middle of the first bevel gear 605 and the interior of the connecting pipe 603, extending to the upper end of the threaded pipe 7. A hinge joint 17 is rotatably connected to the top of the square rod 15. The hinge joint 17 is made of metal iron. An inner seat 14 is fixedly installed inside the threaded pipe 7. A square hole is opened on the inner seat 14. The square rod 15 is connected to the square hole with clearance fit. A third spring 16 is provided at the bottom of the inner seat 14. The square rod 15 is elastically connected to the inner seat 14 through the third spring 16.

[0056] When the magnetic disk 23 is energized and generates magnetic force, it can magnetically attract the hinge joint 17, causing the square rod 15 to move upward. At the same time, it compresses the third spring 16. The square rod 15 drives the connecting plug 21 below to move upward, so that the insertion rod 2103 is inserted into the annular groove 6051. The purpose is that when the connecting tube 603 rotates, the square rod 15 rotates together with it, and the connecting plug 21 rotates with the square rod 15. The insertion rod 2103 makes circular motion in the annular groove 6051. The insertion rod 2103 contacts the stop block 6052. When the connecting tube 603 continues to rotate, it can drive the first bevel gear 605 to rotate together. Through the meshing transmission of the first bevel gear 605 and the second bevel gear 606, the rotating shaft 607 rotates, providing drive for the angle adjustment mechanism for steering wheel angle adjustment.

[0057] When the insertion rod 2103 moves upward during insertion, and is aligned with the stop block 6052 but cannot be inserted into the annular groove 6051, the insertion rod 2103 is blocked and slides with the guide hole 2102. At the same time, it pulls the fourth spring 2104. When the connecting tube 603 rotates, the insertion rod 2103 rotates with it and disengages from the stop block 6052. The force of the fourth spring 2104 allows the insertion rod 2103 to be inserted into the annular groove 6051.

[0058] When the power disk 23 is de-energized, the hinge joint 17 loses its magnetic attraction. The force of the third spring 16 can reset the square rod 15, and the connecting plug 21 below the square rod 15 will also reset.

[0059] In summary, when the steering wheel is extended, the drive mechanism can selectively drive the angle adjustment mechanism or the long-stroke telescopic mechanism, simply by turning the power on and off the electromagnet 23.

[0060] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. A long-stroke electrically adjustable steer-by-wire device, comprising a steering wheel fixing shaft (4), an outer sleeve (1), and a road feel simulation motor (2); characterized in that, Also includes: A long-stroke telescopic mechanism is installed on the outer wall of the outer sleeve (1), and the long-stroke telescopic mechanism has a movable part, which is connected to the steering wheel fixing shaft (4) to drive the steering wheel fixing shaft (4) to retract into the outer sleeve (1) or extend out of the outer sleeve (1); one end of the steering wheel fixing shaft (4) is sleeved with a plug (22) installed on the road feel simulation motor (2), and the plug (22) is located inside the outer sleeve (1); An angle adjustment mechanism is installed at the bottom end of the outer sleeve (1); The input end of the long-stroke telescopic mechanism and the input end of the angle adjustment mechanism are both connected to the drive mechanism. After the steering wheel fixing shaft (4) extends to the outside of the outer sleeve (1), the drive mechanism can switch to drive the long-stroke telescopic mechanism or the angle adjustment mechanism. The movable part of the long-stroke telescopic mechanism includes a movable seat (8), a connecting frame (9), a long strip cover (10), and a movable cylinder (3). A side groove (101) is provided along the length of the side wall of the outer sleeve (1). The long strip cover (10) covers the side groove (101), and both ends of the long strip cover (10) are fixed to the outer wall of the outer sleeve (1). A guide groove (1001) is formed between the long strip cover (10) and the outer wall of the outer sleeve (1). The connecting frame (9) is slidably connected to the guide groove (1001), and both ends of the connecting frame (9) are located inside and outside the outer sleeve (1), respectively. The connecting frame (9) is located in the outer sleeve (1). One end of the inner part is fixedly connected to the bottom end of the movable cylinder (3), and the end of the connecting frame (9) located outside the outer sleeve (1) is connected to the movable seat (8); the movable cylinder (3) is sleeved on the steering wheel fixing shaft (4), and the movable cylinder (3) and the steering wheel fixing shaft (4) are rotatably installed; the long stroke telescopic mechanism also includes a threaded tube (7) and an upper frame (11), the upper frame (11) is fixedly connected to the top side wall of the outer sleeve (1), and an electric disk (23) is fixedly fitted into the lower part of the upper frame (11), the top end of the threaded tube (7) is rotatably installed with the upper frame (11), and the threaded tube (7) is connected to the movable seat (8). The threaded tube (7) is provided with a stop plate (701) at the top end; the movable seat (8) includes an inner sleeve (801) and an outer sleeve (802); the inner sleeve (801) is fitted onto the outer wall of the threaded tube (7) and is threadedly connected to the threaded tube (7); the outer sleeve (802) is fixedly connected to the connecting frame (9); a through hole is provided in the middle of the outer sleeve (802); the inner sleeve (801) is fitted into the through hole with clearance; a receiving guide groove (804) is provided on both sides of the through hole; a chamfered block (803) is connected to the receiving guide groove (804) with clearance; the receiving guide groove (804) is also provided with a first spring (806), one end of the inclined block (803) is elastically connected to the inner groove wall of the receiving guide groove (804) through the first spring (806), an annular groove (805) is provided on the side wall of the inner sleeve (801), and at least one baffle (24) is fixedly installed inside the annular groove (805); one end of the inclined block (803) is embedded in the annular groove (805); a spacer cavity (807) is formed between the lower part of the inner sleeve (801) and the hole wall of the through hole, and an elastic connector is provided in the spacer cavity (807); the outer sleeve (802) is made of iron.The elastic connector includes at least one second spring (808), an outer ring sleeve (809), and an inner ring seat (810). The inner ring seat (810) is connected to the inside of the outer ring sleeve (809) with a clearance fit. Both the outer ring sleeve (809) and the inner ring seat (810) are circular. The bottom end of the second spring (808) is fixedly connected to the top end of the outer ring sleeve (809), and the top end of the second spring (808) is fixedly connected to the wall of the through hole. The outer ring sleeve (809) is fixedly sleeved with the inner circular sleeve (801). After the movable seat (8) moves to the highest position, the power disk (23) is energized to generate magnetic attraction, which magnetically attracts the outer seat (802). The upper part of the inclined block (803) is inclined, and the outer seat (802) moves upward under magnetic attraction until the outer seat (802) contacts the power disk (23). The inclined block (803) and the annular groove (805) are completely separated, so that the outer seat (802) and the inner circular sleeve (801) are only connected by clearance fit.

2. The long-stroke electric adjustable steer-by-wire device as described in claim 1, characterized in that: The bottom end of the movable cylinder (3) is fixedly equipped with a plurality of contact pieces (301) arranged in a ring array, and the contact pieces (301) are in close contact with the inner wall of the outer sleeve (1).

3. The long-stroke electrically adjustable steer-by-wire device as described in claim 1, characterized in that: The drive mechanism includes a servo motor (5) and a transmission box (6); the transmission box (6) is fixedly installed on the outer wall of the outer sleeve (1), and the transmission box (6) includes a housing (601), a worm (602), a worm wheel (604), and a rotating shaft (607). The worm (602) is rotatably installed inside the housing (601), and the servo motor (5) is fixedly installed on one side of the outer wall of the housing (601). The output shaft end of the servo motor (5) is fixedly connected to one end of the worm (602), and the worm (602) is meshed with a worm gear. The worm gear (604) has a connecting pipe (603) fixedly installed in the middle. The connecting pipe (603) is rotatably connected to the top of the housing (601), and the top end of the connecting pipe (603) is fixedly connected to the bottom end of the threaded pipe (7). The bottom end of the connecting pipe (603) is rotatably connected to a first bevel gear (605). The first bevel gear (605) is meshed with a second bevel gear (606). The second bevel gear (606) is fixedly connected to a rotating shaft (607). The rotating shaft (607) is rotatably connected to the side wall of the housing (601).

4. The long-stroke electric adjustment steer-by-wire device according to claim 3, characterized in that: The bottom of the first bevel gear (605) is provided with a connecting plug (21). The connecting plug (21) includes a chassis (2101) and a plug rod (2103). The chassis (2101) is provided with a guide hole (2102). The plug rod (2103) is connected to the guide hole (2102) with a clearance fit. A fourth spring (2104) is sleeved on the plug rod (2103). The plug rod (2103) is elastically connected to the chassis (2101) through the fourth spring (2104). The bottom surface of the first bevel gear (605) is provided with an annular groove (6051). The top of the plug rod (2103) faces the lower part of the annular groove (6051). At least one stop block (6052) is fixedly installed inside the annular groove (6051).

5. The long-stroke electric adjustment steer-by-wire device according to claim 4, characterized in that: A square rod (15) is fixed to the top surface of the chassis (2101). The square rod (15) passes through the hole in the middle of the first bevel gear (605), the inside of the connecting pipe (603), and extends to the upper end of the threaded pipe (7). A hinge joint (17) is rotatably connected to the top of the square rod (15). The hinge joint (17) is made of iron. When the magnetic disk (23) is energized and generates magnetic force, it can magnetically attract the hinge joint (17), so that the square rod (15) can be rotatably connected to the top surface of the chassis (2101). As it moves upward, the square rod (15) drives the connecting plug (21) below to move upward, so that the plug rod (2103) is inserted into the annular groove (6051); the threaded tube (7) is fixedly installed with an inner seat (14), the inner seat (14) has a square hole, the square rod (15) is connected to the square hole with clearance, the bottom of the inner seat (14) is provided with a third spring (16), and the square rod (15) is elastically connected to the inner seat (14) through the third spring (16).

6. The long-stroke electric adjustment steer-by-wire device according to claim 3, characterized in that: The angle adjustment mechanism includes a mounting base (12) fixedly installed at the bottom of the outer sleeve (1) and a hinge shaft (13) fixedly installed on the mounting base (12). One end of the hinge shaft (13) is fixedly connected to a fourth bevel gear (20). The fourth bevel gear (20) is meshed with a third bevel gear (19). The third bevel gear (19) is fixedly connected to a connecting shaft (18). One end of the connecting shaft (18) is fixedly connected to one end of the rotating shaft (607).

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