Folding steering wheel device and control method thereof

Abstract

The invention provides a folding steering wheel device and a control method thereof, and belongs to the field of automobiles. The folding type steering wheel device comprises a display screen, a supporting plate, an arc-shaped plate, a box-shaped framework, an upper wheel flange system, a lower wheel flange system, a planetary gear system, a safety air bag system, a steering column, a steering column sleeve, a corrugated pipe, an electromagnetic valve A, an electromagnetic valve B, a magnet A, a magnet B, a lifting device and a controller (ECU for short), and switching of the folding type steering wheel device between a conventional state and a folding state is achieved. And meanwhile, the damage degree of a driver is obviously reduced in the two states when the vehicle is subjected to head-on collision.

Description

Technical Field

[0001] This invention relates to the automotive field, and more particularly to a folding steering wheel device and its control method. Background Technology

[0002] The steering wheel is an important component of the steering system. The driver turns the steering wheel to steer the vehicle.

[0003] Traditional steering wheels have the disadvantage of not being able to fold or extend. This results in low utilization of interior space when the vehicle is parked or in autonomous driving mode; furthermore, in a frontal collision, the driver may strike the steering wheel, causing serious injury.

[0004] Currently, most steering wheel displays rotate as the steering wheel turns, causing the accuracy and speed at which the driver reads vehicle driving information from the display to decrease due to the steering wheel's rotation.

[0005] The vehicle driving information displayed on the screen is interfered with by steering wheel rotation, significantly reducing the speed at which the driver can normally read the vehicle driving information. Furthermore, placing the display screen on the steering wheel presents new requirements for the installation position and deployment direction of the airbags. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a folding steering wheel device and its control method, enabling the folding steering wheel device to switch between a normal state and a folded state, while ensuring that in both states, the degree of injury to the driver is significantly reduced in the event of a frontal collision.

[0007] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0008] A folding steering wheel device includes a display screen, a support plate, a box-shaped frame, an upper wheel rim system, a lower wheel rim system, and a steering column. The display screen is mounted on the support plate, which is mounted on the box-shaped frame via a solenoid valve B. The upper and lower wheel rim systems are hinged together, and the box-shaped frame is positioned between them. A hollow cylinder is housed within the box-shaped frame, and a planetary gear system is mounted on the hollow cylinder. The hollow cylinder is connected to or separated from the steering column and the support rod via a solenoid valve A. The steering column is fitted into a steering column sleeve, and the lower end of the steering column sleeve is fixedly connected to the vehicle steering gear. In the normal state and full wheel rim usage mode, the driver rotates the upper and lower wheel rim systems to steer the vehicle, and the display screen is in its initial position. In the normal state and half wheel rim usage mode, the driver rotates the upper wheel rim system to steer the vehicle, and the display screen is in its initial position. In the folding mode, the steering wheel folds, rotates, and lowers as a whole.

[0009] In the above scheme, the box-shaped framework is a square structure, a plurality of grooves are arranged on the side wall of the square structure, the grooves are used for positioning the gear structures on the upper wheel rim system and the lower wheel rim system; a circular hole is arranged on the bottom surface of the square structure, a hollow cylinder is arranged at the position of the circular hole, and the hollow cylinder is communicated with the circular hole, and the hollow cylinder is fixed by a fixing device.

[0010] In the above scheme, the box-shaped framework includes an upper side wall, a lower side wall, a left side wall and a right side wall; the upper side wall, the lower side wall, the left side wall and the right side wall form a square structure, and two grooves are arranged on the left side wall and the right side wall.

[0011] In the above scheme, the planetary gear system includes a support rod, an upper support disc, a lower support disc, a sun gear, a plurality of planet gears and a ring gear, the ring gear is arranged above the lower support disc, the ring gear is arranged inside an arc-shaped plate, and the arc-shaped plate is arranged below a support plate; the ring gear is meshed with the plurality of planet gears, the planet gears are meshed with the sun gear, the sun gear is driven to rotate by a servo motor E, the planet gears and the sun gear are arranged in a space formed by the upper support disc and the lower support disc, and the lower support disc is connected with the support rod below.

[0012] In the above scheme, the upper wheel rim system is located above the lower wheel rim system, the upper wheel rim system and the lower wheel rim system are hingedly connected through a hinge, the upper wheel rim system and the lower wheel rim system are left-right symmetrical structures, the upper wheel rim system includes an upper wheel rim A and an upper wheel rim B; the lower wheel rim system includes a lower wheel rim A and a lower wheel rim B, the upper wheel rim A and the upper wheel rim B are both provided with a gear structure A, the gear structure A can drive the upper wheel rim A and the lower wheel rim A and drive the upper wheel rim B and the lower wheel rim B to rotate around a fixed shaft A and a fixed shaft B respectively; the upper wheel rim A and the upper wheel rim B are both provided with a gear structure B, and the gear structure B can drive the lower wheel rim A and the lower wheel rim B to rotate around the hinge.

[0013] In the scheme, the gear structure A comprises a connecting rod B, a connecting block B, a gear B, a fixed shaft B and a servo motor B; one end of the connecting rod B is fixedly connected with the upper rim B, the other end is fixedly connected with one end of the connecting block B, the other end of the connecting block B is provided with the gear B, the gear B is fixed on the connecting block B, the gear of the output end of the servo motor B is engaged with the gear B, and the servo motor B can drive the upper rim B and the lower rim B to rotate when working; similarly, the servo motor A can drive the upper rim A and the lower rim B to rotate when working; the gear structure B comprises a Z-shaped connecting rod A, a U-shaped connecting block A, a round shaft A, a gear C, a fixed shaft C and a servo motor C; one end of the Z-shaped connecting rod A is fixedly connected with the lower rim A, the other end is movably connected with one end of the U-shaped connecting block A through the round shaft A, the other end of the U-shaped connecting block A is provided with the gear C through the fixed shaft C, the gear of the output end of the servo motor C is engaged with the gear C, and the servo motor C can drive the lower rim A to rotate when working; similarly, the servo motor D can drive the lower rim B to rotate when working.

[0014] In the scheme, the safety airbag system comprises an arc-shaped air bag A, an arc-shaped air bag B, a magnet C and a magnet D; the arc-shaped air bag A and the arc-shaped air bag B are respectively arranged in the lower side panel and the upper side panel in the box-shaped framework, wherein the magnet C and the magnet D are used to fix the ends of the arc-shaped air bag A and the arc-shaped air bag B; the arc-shaped air bag A and the arc-shaped air bag B can respectively expand into an arc-shaped air bag A and an arc-shaped air bag B; the magnet A and the magnet B are fixedly connected with the upper surfaces of the upper rim A and the upper rim B; the magnet A and the magnet B are used to adsorb the magnet C in the arc-shaped air bag A.

[0015] In the scheme, the electromagnetic valve A is installed on the inner side of the hollow cylinder, and the axial direction of the electromagnetic valve A is inclined downward; the inner side of the hollow cylinder is connected with the steering column through the electromagnetic valve A, the support rod is located in the steering column, and grooves A, B and through grooves A, B are respectively formed in the corresponding positions of the support rod and the steering column; the hollow cylinder and the steering column are connected with the support rod through the electromagnetic valve A, and the connection between the hollow cylinder and the steering column and the steering column and the support rod can be changed by changing the current flowing into the electromagnetic valve A; the steering column sleeve is sleeved in the steering column sleeve, and the lower end of the steering column sleeve is fixedly connected with the vehicle steering gear; the lower end of the support rod in the planetary gear system is fixedly connected with the upper end of the bellows, and the lower end of the bellows is fixedly connected with the vehicle floor; the axial length of the bellows can be zoomed; the lifting device is installed in the vehicle steering gear, and the steering column can be lifted along the inner wall of the steering column sleeve.

[0016] In the scheme, an ECU is further included, and the ECU controls the safety airbag system, the servo motor A, the servo motor B, the servo motor C (613), the servo motor D, the servo motor E, the electromagnetic valve A, the electromagnetic valve B and the lifting device.

[0017] The control method of the folding steering wheel device comprises the following modes:

[0018] In the normal state and full wheel rim use mode: the ECU supplies a small current to the electromagnetic valve A, the plunger in the electromagnetic valve A moves upward under the action of a low electromagnetic force, at this time the plunger is separated from the groove A of the support rod, thereby releasing the fixed connection between the steering column and the support rod; at the same time, the plunger in the electromagnetic valve A is still inserted into the through groove A of the steering column under the action of gravity, thereby realizing the connection between the hollow cylinder and the steering column and between the steering column and the box-shaped framework; when the ECU is powered on, the plunger moves upward under the action of the electromagnetic force, at this time the plunger is separated from the box-shaped framework, thereby releasing the connection between the support plate and the box-shaped framework; when the driver performs a steering operation, the upper wheel rim system and the lower wheel rim system are rotated, that is, the steering of the vehicle is realized, at this time the display screen is in the initial position, so as to avoid the decrease in the accuracy and speed of the driver reading the vehicle running information in the display screen due to the rotation of the steering wheel; when the vehicle is subjected to a frontal collision, the ECU controls the servo motor C and the servo motor D to start, the servo motor C and the servo motor D rotate the gear C and the gear D respectively, so that the gear C and the gear D rotate counterclockwise as observed from right to left; then the force transmission actions of the fixed shaft C, the U-shaped connecting block A, the circular shaft A and the Z-shaped connecting rod A are sequentially implemented, so as to realize the downward rotation of the lower wheel rim A around the hinge A; the force transmission actions of the fixed shaft D, the U-shaped connecting block B, the circular shaft B and the Z-shaped connecting rod B are sequentially implemented, so as to realize the downward rotation of the lower wheel rim B around the hinge B; finally, the lower wheel rim A and the lower wheel rim B are away from the driver's chest, effectively avoiding the impact of the driver's chest on the lower wheel rim A and the lower wheel rim B, thereby reducing the damage degree of the chest; the ECU controls the arc-shaped air bag A to first expand from the folded state to the inflated state, and then the magnet C at the end of the arc-shaped air bag A is attracted to the magnets A and B on the upper surfaces of the upper wheel rim A and the upper wheel rim B, thereby avoiding the collision between the driver's head and chest and the display screen, the upper wheel rim system and the box-shaped framework, and reducing the damage degree of the driver;

[0019] The full-rim driving mode is changed to half-rim driving mode: The ECU controls servo motors C and D to start, and servo motors C and D rotate gears C and D respectively, causing gears C and D to rotate counterclockwise and clockwise with the right-to-left viewing direction as the reference; then, through the force transmission of fixed shaft C, U-shaped connecting block A, round shaft A, and Z-shaped connecting rod A, the lower rim A rotates around hinge A; through the force transmission of fixed shaft D, U-shaped connecting block B, round shaft B, and Z-shaped connecting rod B, the lower rim B rotates around hinge B; finally, the lower rims A and B rotate 180 degrees and come into contact with the lower surfaces of the upper rims A and B respectively, achieving the half-rim driving state, which is convenient for the driver to perform steering operation with one hand; the ECU sends a small current to solenoid valve A, and the plunger in solenoid valve A moves upward under the action of a low electromagnetic force. At this time, the plunger separates from the groove A of the support rod, thereby disconnecting the steering column from the support rod; at the same time, the plunger in solenoid valve A... Under the influence of gravity, the cylinder remains inserted into the through slot A of the steering column, thus connecting the hollow cylinder to the steering column and the steering column to the box-shaped frame. When the ECU energizes the solenoid valve B, the plunger moves upward under the action of electromagnetic force. At this time, the plunger separates from the box-shaped frame, thereby releasing the fixed connection between the support plate and the box-shaped frame. When the driver performs a steering operation, rotating the upper wheel flange system enables the vehicle to steer. At this time, the display screen is in its initial position to prevent the accuracy and speed of the vehicle's driving information read by the driver from decreasing due to the steering wheel rotation. When the vehicle is involved in a frontal collision, the ECU controls the arc-shaped airbag A to first inflate from a folded state to an inflated state, bursting out from the lower surface of the lower side panel to form an arc-shaped airbag A. Then, the magnet C at the end of the arc-shaped airbag A attracts the magnets A and B on the upper surface of the upper wheel flange and upper wheel flange B. Finally, the arc-shaped airbag A prevents the driver's head and chest from colliding with the display screen, upper wheel flange system, and box-shaped frame, thereby reducing the degree of injury to the driver.

[0020] The full-rim usage mode is changed to folding mode: First, the ECU controls servo motors C and D to start, and servo motors C and D rotate gears C and D respectively, so that gears C and D rotate counterclockwise with the right-to-left viewing direction as the reference; then, through the force transmission of fixed shaft C, U-shaped connecting block A, round shaft A, and Z-shaped connecting rod A, the lower rim A is rotated around hinge A; through the force transmission of fixed shaft D, U-shaped connecting block B, round shaft B, and Z-shaped connecting rod B, the lower rim B is rotated around hinge B; finally, the lower rims A and B rotate 180 degrees and are in contact with the lower surfaces of the upper rims A and B respectively; the second... Step two: The ECU controls servo motors A and B to start, and servo motors A and B rotate gears A and B respectively, causing gears A and B to rotate clockwise and counterclockwise respectively, with the downward viewing direction as the reference. Then, through the force transmission of connecting block A and connecting rod A, the upper wheel rim A and lower wheel rim A rotate upward 90 degrees around the fixed axis A. Through the force transmission of connecting block B and connecting rod B, the upper wheel rim B and lower wheel rim B rotate upward 90 degrees around the fixed axis B. Finally, the display screen is folded into three parts: the left screen, the middle screen, and the right screen. Step three: The ECU cuts off the power supply to solenoid valve B, and the plunger in solenoid valve B... Under the influence of gravity, the piston is inserted into the groove on the upper surface of the box-shaped frame, thus achieving a fixed connection between the support plate and the box-shaped frame. When the ECU supplies a large current to the solenoid valve A12, the plunger moves upward under the action of a strong electromagnetic force. At this time, the plunger separates from the through groove A of the steering column and the groove A of the support rod, thereby releasing the fixed connection between the hollow cylinder and the steering column, and between the steering column and the support rod. In the fourth step, the ECU controls the servo motor E to start, and the servo motor rotates the sun gear, causing the sun gear to rotate counterclockwise with the upward viewing direction as the reference. Through the force transmission of planetary gears A, B, and C, the gear ring rotates clockwise with the upward viewing direction as the reference. The gear ring, through the force transmission of the arc plate, drives the support plate and display screen to rotate 90 degrees to the right; finally, the box-shaped frame, upper wheel rim system, lower wheel rim system, airbag system, solenoid valve A, and solenoid valve B rotate 90 degrees to the right; in the fifth step, the ECU cuts off the power supply to solenoid valve A, and the plunger in solenoid valve A is inserted into the through groove B of the steering column and the groove B of the support rod under the action of gravity, thereby realizing the fixed connection between the hollow cylinder and the steering column, and between the steering column and the support rod 71; the ECU controls the lifting device to realize the steering column descending along the inner wall of the steering column sleeve; through the force transmission, the bellows at the lower end of the support rod is compressed, causing the folding steering wheel device to descend as a whole;

[0021] The half-rim usage changes to folding mode: First, the ECU controls servo motors A511 and B512 to start. Servo motors A and B512 rotate gears A and B respectively, causing gears A and B to rotate clockwise and counterclockwise respectively, based on the upward viewing direction. Then, through the force transmission of connecting block A and connecting rod A, the upper rim A and lower rim A rotate upward 90 degrees around the fixed axis A; through the force transmission of connecting block B and connecting rod B, the upper rim B and lower rim B62 rotate upward 90 degrees around the fixed axis B; finally, the display screen is folded into three parts: left screen, middle screen, and right screen. Second, the ECU cuts off the power supply to solenoid valve B. Under the action of gravity, the plunger in solenoid valve B inserts into the groove on the upper surface of the box-shaped frame, thus achieving a fixed connection between the support plate and the box-shaped frame; when the ECU supplies a large current to solenoid valve A, the plunger moves upward under the action of a strong electromagnetic force. At this time, the plunger separates from the through groove A of the steering column, thus... The first step involves disconnecting the hollow cylinder from the steering column. The second step involves the ECU controlling the servo motor E to start, which rotates the sun gear counter-clockwise relative to the top-down viewing direction. Through the force transmission of planetary gears A, B, and C, the gear ring rotates clockwise relative to the top-down viewing direction. The gear ring, through the force transmission of the arc-shaped plate, causes the support plate and display screen to rotate 90 degrees to the right. Finally, the box-shaped frame, upper wheel rim system, lower wheel rim system, airbag system, solenoid valve A, and solenoid valve B rotate 90 degrees to the right. The third step involves the ECU cutting off the power supply to solenoid valve A. Under the influence of gravity, the plunger in solenoid valve A inserts into the through groove B of the steering column and the groove B of the support rod, thus achieving a fixed connection between the hollow cylinder and the steering column, and between the steering column and the support rod. The ECU controls the lifting device to lower the steering column along the inner wall of the steering column sleeve 10. Through force transmission, the bellows at the lower end of the support rod is compressed, causing the folding steering wheel device to lower as a whole.

[0022] Folded State Mode: In the event of a frontal collision, the ECU controls the arc-shaped airbags A and B to first inflate from their folded state to their inflated state, propelling them out from the lower surface of the lower side panel and the lower surface of the upper side panel, respectively, forming arc-shaped airbags A and B. Then, the magnet C at the end of arc-shaped airbag A and the magnet D at the end of arc-shaped airbag B attract each other to form a single unit. Ultimately, arc-shaped airbags A and B work together to prevent the driver's head and chest from colliding with the display screen, upper wheel rim system, and box-shaped frame, thereby reducing the degree of injury to the driver.

[0023] Transitioning from folded state to full-rim use mode: First, the ECU cuts off the power supply to solenoid valve A12. Under the influence of gravity, the plunger in solenoid valve A12 inserts into the through groove B of the steering column and the groove B of the support rod, thus achieving a fixed connection between the hollow cylinder and the steering column, and between the steering column and the support rod. The ECU controls the lifting device to raise the steering column along the inner wall of the steering column sleeve. Through force transmission, the bellows at the lower end of the support rod is pulled up, causing the entire folding steering wheel device to rise. Second, the ECU cuts off the power supply to solenoid valve B. Under the influence of gravity, the plunger in solenoid valve B inserts into the groove on the upper surface of the box-shaped frame, thus achieving a connection between the support plate and the box-shaped frame. The fixed connection is as follows: When the ECU supplies a large current to the solenoid valve A, the plunger moves upward under the action of a strong electromagnetic force. At this time, the plunger separates from the through groove B of the steering column and the groove B of the support rod, thereby releasing the fixed connection between the hollow cylinder and the steering column, and between the steering column and the support rod. In the third step, the ECU controls the servo motor E to start. The servo motor E rotates the sun gear, so that the sun gear rotates clockwise with the upward viewing direction as the reference. Through the force transmission of planetary gears A, B, and C, the gear ring rotates counterclockwise with the upward viewing direction as the reference. Through the force transmission of the arc plate, the gear ring drives the support plate and the display screen to rotate 90 degrees to the left. Finally, the box-shaped frame, upper wheel rim system, lower wheel rim system, airbag system, solenoid valve A, and solenoid valve B rotate 90 degrees to the left; in the fourth step, the ECU controls servo motors A511 and B to start, and servo motors A and B rotate gears A and B respectively, so that gears A and B rotate counterclockwise and clockwise respectively with the bottom-up viewing direction as the reference; then, through the force transmission of connecting block A and connecting rod A, the upper wheel rim A and lower wheel rim A rotate 90 degrees downward around the fixed axis A; through the force transmission of connecting block B and connecting rod B54, the upper wheel rim B and lower wheel rim B rotate 90 degrees downward around the fixed axis B; finally, the upper wheel rim A rotates 90 degrees downward around the fixed axis B; First, wheel rim A and upper wheel rim B return to their initial positions, and display screen 1 returns to a flat surface. Fifth, the ECU controls servo motors C and D to start, rotating gears C and D respectively, causing them to rotate clockwise with a right-to-left viewing direction as the reference. Then, through the force transmission of fixed shaft C, U-shaped connecting block A, round shaft A, and Z-shaped connecting rod A63, lower wheel rim A rotates around hinge A. Similarly, through the force transmission of fixed shaft D, U-shaped connecting block B, round shaft B, and Z-shaped connecting rod B, lower wheel rim B rotates around hinge B. Finally, lower wheel rims A and B rotate 180 degrees, returning to their initial positions.

[0024] The folding steering wheel transitions to the standard half-rim mode: First, the ECU cuts off the power supply to solenoid valve A. Under gravity, the plunger in solenoid valve A inserts into the through groove B of the steering column and the groove B of the support rod, thus fixing the hollow cylinder to the steering column and the steering column to the support rod. The ECU controls the lifting device, causing the steering column to rise along the inner wall of the steering column sleeve. Through force transmission, the bellows at the lower end of the support rod is pulled up, causing the entire folding steering wheel device to rise. Second, the ECU cuts off the power supply to solenoid valve B. Under gravity, the plunger in solenoid valve B inserts into the groove on the upper surface of the box-shaped frame, thus fixing the support plate to the box-shaped frame. When the ECU supplies a larger current to solenoid valve A, the plunger moves upward under the action of a strong electromagnetic force. At this time, the plunger separates from the through groove B of the steering column and the groove B of the support rod, thus releasing the fixing connection between the hollow cylinder and the steering column, and the steering column and the support rod. Third, the ECU controls the servo motor E to start. The servo motor E rotates the sun gear, causing the sun gear to... The wheel rotates clockwise from a top-down viewing angle, and through the force transmission of planetary gears A, B, and C, the gear ring rotates counterclockwise from a top-down viewing angle. The gear ring, through the force transmission of the arc-shaped plate, causes the support plate and display screen to rotate 90 degrees to the left. Finally, the box-shaped frame, upper wheel rim system, lower wheel rim system, airbag system, solenoid valve A, and solenoid valve B rotate 90 degrees to the left. In the fourth step, the ECU controls servo motors A and B to start. Servo motor B rotates gears A and B58 respectively, causing gears A and B to rotate counterclockwise and clockwise respectively, with the upward viewing direction as the reference. Then, through the force transmission of connecting block A and connecting rod A, the upper rim A and lower rim A rotate downward 90 degrees around the fixed axis A. Through the force transmission of connecting block B and connecting rod B, the upper rim B and lower rim B rotate downward 90 degrees around the fixed axis B. Finally, the upper rim A and upper rim B return to their initial positions, and the display screen returns to a flat surface.

[0025] The beneficial effects of this invention are as follows: The folding steering wheel device of this invention utilizes the coordinated action of a display screen, support plate, arc plate, box-shaped frame, upper wheel rim system, lower wheel rim system, planetary gear system, airbag system, steering column, steering column sleeve, bellows, solenoid valve A, solenoid valve B, lifting device, and ECU to achieve switching between a normal state and a folded state for the folding steering wheel device. Simultaneously, it ensures that in both states, the degree of driver injury is significantly reduced in the event of a frontal collision. When the folding steering wheel device is in the normal state and the full wheel rim is in use, the driver can steer the vehicle by rotating the upper and lower wheel rim systems. At this time, the display screen is in its initial position to ensure that the driver's reading of vehicle driving information is not interfered with by steering wheel rotation. When the folding steering wheel device is in the normal state and the half wheel rim is in use, a half-wheel rim driving state can be achieved, facilitating single-handed steering operation by the driver. The driver can steer the vehicle by rotating the upper wheel rim system. At this time, the display screen is in its initial position to ensure that the driver's reading of vehicle driving information is not interfered with by steering wheel rotation. When the folding steering wheel device is in the folding state, the steering wheel folds, rotates, and lowers as a whole to save interior space and simultaneously enable the vehicle's autonomous driving mode. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the display screen, upper wheel rim system, and lower wheel rim system involved in the folding steering wheel device;

[0027] Figure 2 This is a structural diagram of a box-shaped frame, an upper rim system, and a lower rim system.

[0028] Figure 3 This is a structural diagram of a box-shaped frame, upper wheel rim system, lower wheel rim system, steering column, and steering column sleeve.

[0029] Figure 4 This is a structural diagram of the display screen, support plate, and box-shaped frame.

[0030] Figure 5 A schematic diagram of a box-shaped frame and planetary gear system;

[0031] Figure 6 This is a structural diagram of the support plate, the arc plate, and the solenoid valve B.

[0032] Figure 7 This is a schematic diagram of the planetary gear system and bellows.

[0033] Figure 8 This is a schematic diagram of a box-shaped skeleton.

[0034] Figure 9 This is a schematic diagram of the upper rim system;

[0035] Figure 10 This is a schematic diagram of the lower rim system.

[0036] Figure 11 This is an exploded view of the planetary gear system.

[0037] Figure 12 This is a schematic diagram of the hollow cylinder and solenoid valve A.

[0038] Figure 13 This is a top view of the hollow cylinder and solenoid valve A;

[0039] Figure 14 This is a schematic diagram of the steering column structure;

[0040] Figure 15 This is a top view of the steering column;

[0041] Figure 16 This is a structural schematic diagram of the support rod;

[0042] Figure 17 This is a top view of the support rod;

[0043] Figure 18 This is a schematic diagram showing the positions of the upper side panel, left side panel, right side panel, lower side panel, arc-shaped air bag A, and arc-shaped air bag B;

[0044] Figure 19 This is a control diagram of the ECU.

[0045] The attached figures are labeled as follows:

[0046] 1-Display screen; 2-Support plate; 3-Arc-shaped plate; 4-Box-shaped frame; 5-Upper rim system; 6-Lower rim system; 7-Planetary gear system; 8-Airbag system; 9-Steering column; 10-Steering column sleeve; 11-Bellwall; 12-Solenoid valve A; 13-Solenoid valve B; 14-Lifting device; 15-Magnet A; 16-Magnet B; 17-ECU; 41-Upper side panel; 42-Left side panel; 43-Right side panel; 44-Lower side panel; 45-Transverse connecting rod A; 46-Transverse connecting rod B; 47-Hollow cylinder; 51-Upper rim A; 52-Upper rim B; 53-Connecting rod A; 54-Connecting rod B; 55-Connecting block A; 56-Connecting block B; 57-Gear A; 58-Gear B; 59-Fixed shaft A; 510-Fixed shaft B; 511-Servo motor A; 512 - Servo motor B; 513- Hinge A; 514- Hinge B; 61- Lower rim A; 62- Lower rim B; 63- Z-type connecting rod A; 64- Z-type connecting rod B; 65- U-type connecting block A; 66- U-type connecting block B; 67- Round shaft A; 68- Round shaft B; 69- Gear C; 610- Gear D; 611- Fixed shaft C; 612- Fixed shaft D; 613- Servo motor C; 614 - Servo motor D; 71- Support rod; 72- Upper support plate; 73- Lower support plate; 74- Sun gear; 75- Planetary gear A; 76- Planetary gear B; 77- Planetary gear C; 78- Gear ring; 79- Fixed shaft E; 710- Fixed shaft F; 711- Fixed shaft G; 712- Servo motor E; 81- Arc-shaped air bag A; 82- Arc-shaped air bag B; 83- Magnet C; 84- Magnet D. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation 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" and "second" 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" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] The folding steering wheel device includes a display screen 1, a support plate 2, an arc plate 3, a box-shaped frame 4, an upper wheel rim system 5, a lower wheel rim system 6, a planetary gear system 7, an airbag system 8, a steering column 9, a steering column sleeve 10, a bellows 11, a solenoid valve A12, a solenoid valve B13, a lifting device 14, a magnet A15, a magnet B16, and an ECU 17.

[0051] The topmost component is the display screen 1. Below the display screen 1 are the support plate 2, the curved plate 3, the box-shaped frame 4, the upper wheel rim system 5, the lower wheel rim system 6, the planetary gear system 7, the airbag system 8, the steering column 9, the steering column sleeve 10, the bellows 11, the solenoid valve A12, the solenoid valve B13, and the lifting device 14. The upper and lower surfaces of the support plate 2 are fixedly connected to the display screen 1 and the curved plate 3, respectively. Two notches are opened on the left and right sides of the support plate 2. The lower surface of the support plate 2 is perpendicular to the axial direction of the curved plate 3.

[0052] The box-shaped frame 4 consists of an upper side panel 41, a left side panel 42, a right side panel 43, a lower side panel 44, transverse connecting rods A45 and B46, and a hollow cylinder 47. The upper side panel 41, left side panel 42, right side panel 43, and lower side panel 44 together form the square structure of the box frame 4. The left ends of transverse connecting rods A45 and B46 are fixedly connected to the inner surface of the left side panel 1, and the right ends of transverse connecting rods A45 and B46 are fixedly connected to the hollow cylinder 47. The left side panel 42 and right side panel 43 each have two notches. The left notch of the support plate 2 corresponds to the notch of the left side panel 42; the right notch of the support plate 2 corresponds to the notch of the right side panel 43.

[0053] The planetary gear system 7 consists of a support rod 71, an upper support plate 72, a lower support plate 73, a sun gear 74, planetary gears A75, B76, and C77, a gear ring 78, fixed shafts E79, F710, and G711, and a servo motor E712. The support rod 71 is cylindrical, and its upper end is fixedly connected to the lower surface of the lower support plate 73. Fixed shafts E79, F710, and G711 are located between the upper and lower support plates 72 and 73, and are fixedly connected to both. The fixed shafts E79, F710, and G711 pass through the centers of planetary gears A75, B76, and C77 respectively. The lower end of the servo motor E712 forms a rotational hinge with the lower support plate 73. Servo motor E712 passes through the midpoint of sun gear 74 and is fixedly connected to sun gear 74. Sun gear 74 meshes with planetary gears A75, B76, and C77. Gear ring 78 is located between upper support plate 72 and lower support plate 73, with its lower surface in contact with the upper surface of lower support plate 73, and meshes with planetary gears A75, B76, and C77. The lower surface of lower support plate 73 contacts the upper surface of hollow cylinder 47 in box-shaped frame 4, and support rod 71 passes through the center of hollow cylinder 47. The inner surface of arc plate 3 is fixedly connected to the outer surface of gear ring 78.

[0054] The upper rim system 5 is located above the lower rim system 6. The upper rim system is a left-right symmetrical structure, consisting of upper rim A51, upper rim B52, connecting rod A53, connecting rod B54, connecting block A55, connecting block B56, gear A57, gear B58, fixed shaft A59, fixed shaft B510, servo motor A511, servo motor B512, hinge A513, and hinge B514. The cross-sections of upper rim A51 and upper rim B52 are semi-circular. With the vehicle's direction of travel as a reference, upper rim A51 and upper rim B52 are fixedly connected to the left end of connecting rod A53 and the right end of connecting rod B54, respectively. The right end of connecting rod A53 and the left end of connecting rod B54 are fixedly connected to the left end of connecting block A55 and the right end of connecting block B56, respectively. An opening is located at the right end of connecting block A55 and the left end of connecting block B56. Gears A57 and B58 are located within the right-end opening of connecting block A55 and the left-end opening of connecting block B56, respectively. Gears A57 and B58 are fixedly connected to the right-end opening of connecting block A55 and the left-end opening of connecting block B56, respectively. Fixed shafts A59 and B510 are fixedly installed in the upper notches of the left side panel 42 and the right side panel 43 of the box-shaped frame 4, respectively. Fixed shaft A59 passes through the opening of connecting block A55 and the center of gear A57; fixed shaft B510 passes through the opening of connecting block B56 and the center of gear B58. Gears A57 and B58 can rotate around the axial direction of fixed shafts A59 and B510. One end of servo motors A511 and B512 is fixedly connected to the inner surface of the upper side panel 41, and the other end meshes with gears A57 and B58, respectively. Hinges A513 and B514 are respectively installed at the lower ends of upper rims A51 and B52. The tops of connecting blocks A55 and B56 are in contact with the lower surface of support plate 2. Magnets A15 and B16 are fixedly connected to the upper surfaces of upper rims A51 and B52, respectively.

[0055] The lower wheel rim system 6 is a left-right symmetrical structure, consisting of lower wheel rim A61, lower wheel rim B62, Z-shaped connecting rod A63, Z-shaped connecting rod B64, U-shaped connecting block A65, U-shaped connecting block B66, round shaft A67, round shaft B68, gear C69, gear D610, fixed shaft C611, fixed shaft D612, servo motor C613, and servo motor D614. The lower wheel rims A61 and B62 have circular cross-sections. With the vehicle's travel direction as the reference, lower wheel rims A61 and B62 are fixedly connected to the left end of Z-shaped connecting rod A63 and the right end of Z-shaped connecting rod B64, respectively. Round shafts A67 and B68 pass through the small holes at the right end of Z-shaped connecting rod A63 and the left end of Z-shaped connecting rod A64, respectively. Meanwhile, round shafts A67 and B68 are fixed in the small holes at the open ends of U-shaped connecting blocks A65 and B66, respectively. Z-shaped connecting rods A63 and B64 can rotate around round shafts A67 and B68, respectively. Fixed shafts C611 and D612 are fixedly installed at the closed ends of U-shaped connecting blocks A65 and B66, respectively. Fixed shafts C611 and D612 pass through gears C69 and D610, respectively, and are fixedly connected to gears C69 and D610. The left end of servo motor C613 and the right end of servo motor D614 are fixedly connected to the inner surfaces of the left side panel 42 and the right side panel 43, respectively, and the right end of servo motor C613 and the left end of servo motor D614 mesh with gears C69 and D610, respectively. The upper ends of the lower rims A61 and B62 form rotational hinges with hinges A513 and B514, allowing the lower rims A61 and B62 to rotate around hinges A and B respectively.

[0056] The airbag system 8 consists of an arc-shaped airbag A81, an arc-shaped airbag B82, a magnet C83, and a magnet D84. Arc-shaped airbags A81 and B82 are folded and stored inside the lower side panel 44 and the upper side panel 41, respectively. Magnets C83 and D84 are fixed to the ends of arc-shaped airbags A81 and B82, respectively. Arc-shaped airbags A81 and B82 can inflate into arc-shaped airbag A and arc-shaped airbag B, respectively.

[0057] The upper end of the steering column 9 is located inside the hollow cylinder 47, and the support rod 71 is located inside the steering column 9. With a top-down viewing direction as a reference, through slots A and B are respectively opened at a negative 45-degree and positive 45-degree positions on the circumference of the steering column 9, and grooves A and B are respectively opened at a negative 45-degree and positive 45-degree positions on the outer circumference of the support rod 71. The upper surface of the steering column 9 is in contact with the lower surface of the lower support plate 72 in the planetary gear system 7. Using solenoid valve A12, a fixed connection can be achieved between the hollow cylinder 47 and the steering column 9, and between the steering column 9 and the support rod 71. With a top-down viewing direction as a reference, solenoid valve A12 is installed inside the hollow cylinder 47, located at a negative 45-degree position on the circumference of the hollow cylinder 47. The axial direction of solenoid valve A12 is tilted downwards, and the plunger in solenoid valve A12 can be inserted into the steering column 9 and the support rod 71. When solenoid valve A12 is not energized, the plunger, under the influence of gravity, inserts into the through groove A of the steering column 9 and the groove A of the support rod 71, thus achieving a fixed connection between the hollow cylinder 47 and the steering column 9, and between the steering column 9 and the support rod 71. When a small current is applied to solenoid valve A12, the plunger moves upward under the influence of a lower electromagnetic force, at which point the plunger separates from the support rod 71, thereby releasing the fixed connection between the steering column 9 and the support rod 71. When a larger current is applied to solenoid valve A12, the plunger continues to move upward under the influence of a stronger electromagnetic force, at which point the plunger separates from the steering column 9, thereby releasing the fixed connection between the hollow cylinder 47 and the steering column 9.

[0058] The steering column 9 is fitted inside the steering column sleeve 10, and the lower end of the steering column sleeve 10 is fixedly connected to the vehicle steering gear. The lower end of the support rod 71 in the planetary gear system 7 is fixedly connected to the upper end of the bellows 11, and the lower end of the bellows 11 is fixedly connected to the vehicle floor. The axial length of the bellows 11 can be scaled. The lifting device 14 is installed in the vehicle steering gear and can raise and lower the steering column 9 along the inner wall of the steering column sleeve 10.

[0059] The solenoid valve B13 enables a fixed connection between the support plate 2 and the box-shaped frame 4. The solenoid valve B13 is installed in the support plate 2, with its axial direction perpendicularly downwards. The plunger in the solenoid valve B13 can be inserted into a groove on the upper surface of the box-shaped frame 4. When the solenoid valve B13 is not energized, the plunger is inserted into the groove on the upper surface of the box-shaped frame 4 under the action of gravity, thus achieving a fixed connection between the support plate 2 and the box-shaped frame 4. When the solenoid valve B13 is energized, the plunger moves upwards under the action of electromagnetic force. At this time, the plunger separates from the box-shaped frame 4, thereby releasing the fixed connection between the support plate 2 and the box-shaped frame 4.

[0060] ECU17 is the core of the entire device and can be integrated into the vehicle's central controller. The ECU controls the airbag system 8, servo motors A511, B512, C613, D614, E712, solenoid valves A12 and B13, and the lifting device 14.

[0061] To achieve the desired effect of this invention, the following control method is employed:

[0062] (1) When the folding steering wheel device is in its normal state and the entire wheel rim is in use, ECU17 supplies a small current to solenoid valve A12. The plunger in solenoid valve A12 moves upward under the action of a low electromagnetic force. At this time, the plunger separates from the groove A of the support rod 71, thereby releasing the fixed connection between the steering column 9 and the support rod 71. At the same time, the plunger in solenoid valve A12 is still inserted into the through groove A of the steering column 9 under the action of gravity, thereby realizing the fixed connection between the hollow cylinder 47 and the steering column 9, and between the steering column 9 and the box-shaped frame 4. When ECU17 supplies power to solenoid valve B13, the plunger moves upward under the action of electromagnetic force. At this time, the plunger separates from the box-shaped frame 4, thereby releasing the fixed connection between the support plate 2 and the box-shaped frame 4. When the driver performs a steering operation, the upper wheel rim system 5 and the lower wheel rim system 6 are rotated to achieve vehicle steering. At this time, the display screen 1 is in the initial position to avoid the accuracy and speed of the driver reading the vehicle driving information on the display screen 1 decreasing due to the rotation of the steering wheel. When a frontal collision occurs, ECU17 controls servo motors C613 and D614 to start, which in turn rotate gears C69 and D610, causing them to rotate counterclockwise from a right-to-left viewing angle. Then, through the force transmission via fixed shaft C611, U-shaped connecting block A65, round shaft A67, and Z-shaped connecting rod A63, the lower wheel rim A61 rotates downwards around hinge A513; and through the force transmission via fixed shaft D612, U-shaped connecting block B66, round shaft B68, and Z-shaped connecting rod B64, the lower wheel rim B62 rotates downwards around hinge B514. Ultimately, this moves the lower wheel rims A61 and B62 away from the driver's chest, effectively preventing the driver's chest from impacting the lower wheel rims A61 and B62, thus reducing the severity of chest injuries. On the other hand, ECU17 controls the arc-shaped airbag A81 to first expand from the folded state to the expanded state, and to burst out from the lower surface of the lower side panel 44 to form an arc-shaped airbag A; then the magnet C83 at the end of the arc-shaped airbag A attracts the magnets A15 and B16 on the upper surface of the upper wheel rim A51 and the upper wheel rim B52; finally, the arc-shaped airbag A prevents the driver's head and chest from colliding with the display screen 1, the upper wheel rim system 5, and the box-shaped frame 4, thereby reducing the degree of injury to the driver.

[0063] (2) When the folding steering wheel device is in the normal state and changes from full rim use to half rim use, ECU17 controls servo motor C613 and servo motor D614 to start. Servo motor C613 and servo motor D614 rotate gear C611 and gear D612 respectively, so that gear C611 and gear D612 rotate counterclockwise and clockwise with the right-to-left viewing direction as the reference. Then, through the force transmission of fixed shaft C611, U-shaped connecting block A65, round shaft A67, and Z-shaped connecting rod A63, the lower wheel rim A61 rotates around hinge A513; through the force transmission of fixed shaft D612, U-shaped connecting block B66, round shaft B68, and Z-shaped connecting rod B64, the lower wheel rim B62 rotates around hinge B614; finally, the lower wheel rims A61 and B62 rotate 180 degrees and fit against the lower surfaces of the upper wheel rims A51 and B52 respectively, achieving a half-rim driving state, which facilitates the driver to perform steering operations with one hand. When ECU17 supplies a small current to solenoid valve A12, the plunger in solenoid valve A12 moves upward under the action of a low electromagnetic force. At this time, the plunger separates from the groove A of support rod 71, thereby releasing the fixed connection between steering column 9 and support rod 71. Simultaneously, the plunger in solenoid valve A12 remains inserted into the through groove A of steering column 9 under the action of gravity, thus achieving the fixed connection between hollow cylinder 47 and steering column 9, and steering column 9 and box-shaped frame 4. When ECU17 energizes solenoid valve B13, the plunger moves upward under the action of electromagnetic force. At this time, the plunger separates from box-shaped frame 4, thereby releasing the fixed connection between support plate 2 and box-shaped frame 4. When the driver performs a steering operation, rotating the upper wheel flange system 5 can achieve vehicle steering. At this time, display screen 1 is in the initial position to avoid the driver's accuracy and speed in reading vehicle driving information on display screen 1 decreasing due to steering wheel rotation. When a frontal collision occurs, the ECU17 controls the arc-shaped airbag A81 to first inflate from a folded state to an inflated state, and it bursts out from the lower surface of the lower side panel 44 to form an arc-shaped airbag A. Then, the magnet C83 at the end of the arc-shaped airbag A attracts the magnets A15 and B16 on the upper surface of the upper wheel rim 51 and upper wheel rim B52. Finally, the arc-shaped airbag A prevents the driver's head and chest from colliding with the display screen 1, the upper wheel rim system 5, and the box-shaped frame 4, thereby reducing the degree of injury to the driver.

[0064] (3) When the folding steering wheel device changes from the normal state (full rim usage) to the folding state, firstly, ECU17 controls servo motors C613 and D614 to start, and servo motors C613 and D614 rotate gears C69 and D610 respectively, so that gears C69 and D610 rotate counterclockwise with the right-to-left viewing direction as the reference. Then, through the force transmission of fixed shaft C611, U-shaped connecting block A65, round shaft A67, and Z-shaped connecting rod A63, the lower rim A61 rotates around hinge A513; through the force transmission of fixed shaft D612, U-shaped connecting block B66, round shaft B68, and Z-shaped connecting rod B64, the lower rim B62 rotates around hinge B514; finally, the lower rims A61 and B62 rotate 180 degrees and fit against the lower surfaces of the upper rims A51 and B52 respectively. The second step involves ECU17 controlling servo motors A511 and B512 to start. Servo motors A511 and B512 rotate gears A57 and B58 respectively, causing them to rotate clockwise and counterclockwise respectively, based on an upward viewing direction. Then, through the force transmission of connecting block A55 and connecting rod A53, the upper rim A51 and lower rim A61 rotate 90 degrees upward around the fixed axis A59; similarly, through the force transmission of connecting block B56 and connecting rod B54, the upper rim B52 and lower rim B62 rotate 90 degrees upward around the fixed axis B510. Finally, the display screen 1 is folded into three parts: a left screen, a middle screen, and a right screen. The third step involves ECU17 cutting off the power supply to solenoid valve B13. Under the influence of gravity, the plunger in solenoid valve B13 inserts into the groove on the upper surface of the box-shaped frame 4, thus achieving a fixed connection between the support plate 2 and the box-shaped frame 4. When ECU17 supplies a large current to solenoid valve A12, the plunger moves upward under the action of a strong electromagnetic force. At this time, the plunger separates from the through groove A of steering column 9 and the groove A of support rod 71, thereby releasing the fixed connection between hollow cylinder 47 and steering column 9, and steering column 9 and support rod 71. In the fourth step, ECU17 controls servo motor E712 to start, and servo motor 712 rotates sun gear 74, causing sun gear 74 to rotate counterclockwise with the top-down viewing direction as the reference. Through the force transmission of planetary gears A75, B76, and C77, ring gear 78 rotates clockwise with the top-down viewing direction as the reference. Ring gear 78, through the force transmission of arc plate 3, drives support plate 2 and display screen 1 to rotate 90 degrees to the right. Finally, box-shaped frame 4, upper wheel rim system 5, lower wheel rim system 6, airbag system 8, solenoid valve A12, and solenoid valve B13 rotate 90 degrees to the right.Fifth, ECU17 cuts off the power supply to solenoid valve A12. Under the action of gravity, the plunger in solenoid valve A12 inserts into the through groove B of steering column 9 and the groove B of support rod 71, thereby achieving a fixed connection between hollow cylinder 47 and steering column 9, and between steering column 9 and support rod 71. ECU17 controls lifting device 14 to lower steering column 9 along the inner wall of steering column sleeve 10. Through force transmission, the bellows 11 at the lower end of support rod 71 is compressed, causing the folding steering wheel device to lower as a whole.

[0065] (4) When the folding steering wheel device changes from the normal state (half-rim use) to the folding state, firstly, ECU17 controls servo motors A511 and B512 to start. Servo motors A511 and B512 rotate gears A57 and B58 respectively, so that gears A57 and B58 rotate clockwise and counterclockwise respectively with the bottom-up viewing direction as the reference. Then, through the force transmission of connecting block A55 and connecting rod A53, the upper rim A51 and lower rim A61 are rotated 90 degrees upward around the fixed shaft A59; through the force transmission of connecting block B56 and connecting rod B54, the upper rim B52 and lower rim B62 are rotated 90 degrees upward around the fixed shaft B510; finally, the display screen 1 is folded into three parts: the left screen, the middle screen, and the right screen. The second step involves ECU17 cutting off the power supply to solenoid valve B13. Under the influence of gravity, the plunger in solenoid valve B13 inserts into the groove on the upper surface of the box-shaped frame 4, thus achieving a fixed connection between the support plate 2 and the box-shaped frame 4. When ECU17 supplies a larger current to solenoid valve A12, the plunger moves upward under the influence of a strong electromagnetic force. At this time, the plunger separates from the through groove A of the steering column 9, thereby releasing the fixed connection between the hollow cylinder 47 and the steering column 9. The third step involves ECU17 controlling the servo motor E712 to start. The servo motor E712 rotates the sun gear 74, causing the sun gear 74 to rotate counterclockwise with the top-down viewing direction as the reference. Through the force transmission of planetary gears A75, B76, and C77, the gear ring 78 rotates clockwise with the top-down viewing direction as the reference. The gear ring 78, through the force transmission of the arc plate 3, drives the support plate 2 and the display screen 1 to rotate 90 degrees to the right. Ultimately, the box-shaped frame 4, upper wheel rim system 5, lower wheel rim system 6, airbag system 8, solenoid valve A12, and solenoid valve B13 rotate 90 degrees to the right. In the fourth step, the ECU 17 cuts off the power supply to solenoid valve A12. Under the action of gravity, the plunger in solenoid valve A12 inserts into the through groove B of the steering column 9 and the groove B of the support rod 71, thus achieving a fixed connection between the hollow cylinder 47 and the steering column 9, and between the steering column 9 and the support rod 71. The ECU 17 controls the lifting device 14 to lower the steering column 9 along the inner wall of the steering column sleeve 10. Through force transmission, the bellows 11 at the lower end of the support rod 71 is compressed, causing the entire folding steering wheel device to lower.

[0066] (5) When the folding steering wheel device is in the folded state, if the vehicle is involved in a frontal collision, the ECU17 controls the arc-shaped airbags A81 and B82 to first expand from the folded state to the expanded state, and they burst out from the lower surface of the lower side panel 44 and the lower surface of the upper side panel 41 respectively, forming arc-shaped airbags A and B; then the magnet C83 at the end of the arc-shaped airbag A and the magnet D84 at the end of the arc-shaped airbag B attract each other to form a whole; finally, the arc-shaped airbags A and B work together to prevent the driver's head and chest from colliding with the display screen 1, the upper wheel rim system 5, and the box-shaped frame 4, thereby reducing the degree of injury to the driver.

[0067] (6) When the folding steering wheel device changes from the folded state to the normal state (full rim usage), firstly, ECU17 cuts off the power supply to solenoid valve A12. Under the action of gravity, the plunger in solenoid valve A12 inserts into the through groove B of steering column 9 and the groove B of support rod 71, thereby achieving a fixed connection between hollow cylinder 47 and steering column 9, and between steering column 9 and support rod 71. ECU17 controls lifting device 14 to make steering column 9 rise along the inner wall of steering column sleeve 10. Through force transmission, the bellows 11 at the lower end of support rod 71 is pulled up, causing the folding steering wheel device to rise as a whole. Secondly, ECU17 cuts off the power supply to solenoid valve B13. Under the action of gravity, the plunger in solenoid valve B13 inserts into the groove on the upper surface of box frame 4, thereby achieving a fixed connection between support plate 2 and box frame 4. When ECU17 supplies a large current to solenoid valve A12, the plunger moves upward under the action of a strong electromagnetic force. At this time, the plunger separates from the through groove B of steering column 9 and the groove B of support rod 71, thereby releasing the fixed connection between hollow cylinder 47 and steering column 9, and steering column 9 and support rod 71. Thirdly, ECU17 controls servo motor E712 to start. Servo motor E712 rotates sun gear 74, causing sun gear 74 to rotate clockwise with the top-down viewing direction as the reference. Through the force transmission of planetary gears A75, B76, and C77, ring gear 78 rotates counterclockwise with the top-down viewing direction as the reference. Ring gear 78, through the force transmission of arc plate 3, drives support plate 2 and display screen 1 to rotate 90 degrees to the left. Finally, box-shaped frame 4, upper wheel rim system 6, lower wheel rim system 7, airbag system 8, solenoid valve A12, and solenoid valve B13 rotate 90 degrees to the left. In the fourth step, ECU17 controls servo motors A511 and B512 to start, causing them to rotate gears A57 and B58 respectively, rotating them counterclockwise and clockwise from a bottom-up viewing angle. Then, through the force transmission of connecting block A55 and connecting rod A53, the upper rim A51 and lower rim A61 rotate 90 degrees downwards around the fixed axis A59; subsequently, through the force transmission of connecting block B56 and connecting rod B54, the upper rim B52 and lower rim B62 rotate 90 degrees downwards around the fixed axis B510; finally, the upper rim A51 and upper rim B52 return to their initial positions, and display screen 1 returns to a flat surface. Fifth step, ECU17 controls servo motors C613 and D614 to start, and servo motors C613 and D614 rotate gears C69 and D610 respectively, so that gears C69 and D610 rotate clockwise with the right-to-left viewing direction as the reference.Then, through the force transmission of fixed shaft C611, U-shaped connecting block A65, round shaft A67, and Z-shaped connecting rod A63 in sequence, the lower wheel rim A61 rotates around hinge A513; through the force transmission of fixed shaft D612, U-shaped connecting block B66, round shaft B68, and Z-shaped connecting rod B64 in sequence, the lower wheel rim B62 rotates around hinge B514; finally, the lower wheel rims A61 and B62 rotate 180 degrees and return to their initial positions.

[0068] (7) When the folding steering wheel device changes from the folded state to the normal state (half-rim use), firstly, ECU17 cuts off the power supply to solenoid valve A12. Under the action of gravity, the plunger in solenoid valve A12 inserts into the through groove B of steering column 9 and the groove B of support rod 71, thereby achieving a fixed connection between hollow cylinder 47 and steering column 9, and between steering column 9 and support rod 71. ECU17 controls lifting device 14 to make steering column 9 rise along the inner wall of steering column sleeve 10. Through force transmission, the bellows 11 at the lower end of support rod 71 is pulled up, causing the folding steering wheel device to rise as a whole. Secondly, ECU17 cuts off the power supply to solenoid valve B13. Under the action of gravity, the plunger in solenoid valve B13 inserts into the groove on the upper surface of box frame 4, thereby achieving a fixed connection between support plate 2 and box frame 4. When ECU17 supplies a large current to solenoid valve A12, the plunger moves upward under the action of a strong electromagnetic force. At this time, the plunger separates from the through groove B of steering column 9 and the groove B of support rod 71, thereby releasing the fixed connection between hollow cylinder 47 and steering column 9, and steering column 9 and support rod 71. Thirdly, ECU17 controls servo motor E712 to start. Servo motor E712 drives sun gear 74, causing sun gear 74 to rotate clockwise with the top-down viewing direction as the reference. Through the force transmission of planetary gears A75, B76, and C77, ring gear 78 rotates counterclockwise with the top-down viewing direction as the reference. Ring gear 78, through the force transmission of arc plate 3, drives support plate 2 and display screen 1 to rotate 90 degrees to the left. Finally, box-shaped frame 4, upper wheel rim system 5, lower wheel rim system 6, airbag system 8, solenoid valve A12, and solenoid valve B13 rotate 90 degrees to the left. In the fourth step, ECU17 controls servo motors A511 and B512 to start. Servo motors A511 and B512 rotate gears A57 and B58 respectively, causing gears A57 and B58 to rotate counterclockwise and clockwise respectively, with the upward viewing direction as the reference. Then, through the force transmission of connecting block A55 and connecting rod A53, the upper rim A51 and lower rim A61 rotate downwards by 90 degrees around the fixed axis A59; through the force transmission of connecting block B56 and connecting rod B4, the upper rim B52 and lower rim B62 rotate downwards by 90 degrees around the fixed axis B510; finally, the upper rim A51 and upper rim B52 return to their initial positions, and the display screen returns to a flat surface.

[0069] Specifically, the normal state of the folding steering wheel device refers to the unfolded state. When the vehicle is traveling straight and the folding steering wheel device is in its normal state with all wheel rims in use, the folding steering wheel device and its components are in their initial position.

[0070] Specifically, when solenoid valve A12 is in its initial position, it is installed at a negative 45-degree angle to the inner circumference of hollow cylinder 47. Steering column 9, steering column sleeve 10, support rod 71, bellows 11 are perpendicular to support plate 2 and display screen 1.

[0071] Specifically, connecting block A55 and gear A57 are located in the upper left notch of support plate 2 and the upper notch of left side panel 42; connecting block B56 and gear B58 are located in the upper right notch of support plate 2 and the upper notch of right side panel 43; U-shaped connecting block A65 and round shaft A67 are located in the lower left notch of support plate 2 and the lower notch of left side panel 42; U-shaped connecting block B66 and round shaft B68 are located in the lower right notch of support plate 2 and the lower notch of right side panel 43.

[0072] Specifically, in steps (3) and (4), the purpose of rotating the display screen 1, support plate 2, box frame 4, upper wheel rim system 5, lower wheel rim system 6, and airbag system 8 90 degrees to the right is to make full use of the lateral space in the front row during the descent of the folding steering wheel device.

[0073] It should be noted that the directional indicators such as up, down, left, right, front, and rear involved in this invention are only used for the convenience of describing this invention and are not intended to limit the scope of protection of this invention. They are consistent with the up, down, left, right, front, and rear corresponding to the conventional use of motor vehicles.

[0074] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent methods or modifications that do not depart from the technology of the present invention should be included within the scope of protection of the present invention.

[0075] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A folding steering wheel device, characterized in that, The system includes a display screen (1), a support plate (2), a box-shaped frame (4), an upper rim system (5), a lower rim system (6), and a steering column (9). The display screen (1) is mounted on the support plate (2), which is mounted on the box-shaped frame (4) via a solenoid valve B (13). The upper rim system (5) and the lower rim system (6) are hinged together, and the box-shaped frame (4) is positioned between them. A hollow cylinder (47) is provided inside the box-shaped frame (4), and a planetary gear system (7) is mounted on the hollow cylinder (47). The hollow cylinder (47) is connected to a steering column (9) via a solenoid valve A (13). 2) To achieve the connection or separation of the hollow cylinder (47) and the steering column (9), and the steering column (9) and the support rod (71); the steering column (9) is sleeved in the steering column sleeve (10), and the lower end of the steering column sleeve (10) is fixedly connected to the vehicle steering gear; in the normal state and full rim use mode, the driver rotates the upper rim system (5) and the lower rim system (6) to achieve vehicle steering, and the display screen (1) is in the initial position; in the normal state and half rim use mode, the driver rotates the upper rim system (5) to achieve vehicle steering, and the display screen (1) is in the initial position; in the folding state mode, the steering wheel is folded, rotated and lowered as a whole.

2. The folding steering wheel device according to claim 1, characterized in that, The box-shaped frame (4) is a square structure. Several grooves are provided on the side wall of the square structure. The grooves are used to position the gear structure on the upper rim system (5) and the lower rim system (6). A round hole is provided on the bottom surface of the square structure. A hollow cylinder (47) is provided at the location of the round hole. The hollow cylinder (47) communicates with the round hole. The hollow cylinder (47) is fixed by a fixing device.

3. The folding steering wheel device according to claim 2, characterized in that, The box-shaped frame (4) includes an upper side panel (41), a lower side panel (44), a left side panel (42), and a right side panel (43); the upper side panel (41), the lower side panel (44), the left side panel (42), and the right side panel (43) form a square structure, and two grooves are correspondingly opened on the left side panel (42) and the right side panel (43).

4. The folding steering wheel device according to claim 1, characterized in that, The planetary gear system (7) includes a support rod (71), an upper support plate (72), a lower support plate (73), a sun gear (74), several planetary gears, and a gear ring (78). The gear ring (78) is located above the lower support plate (73) and is located inside the arc plate (3). The arc plate (3) is located below the support plate (2). The gear ring (78) meshes with several planetary gears, and the planetary gears mesh with the sun gear (74). The sun gear (74) is driven to rotate by a servo motor E (712). The planetary gears and the sun gear (74) are placed in the space formed by the upper support plate (72) and the lower support plate (73). The support rod (71) is connected below the lower support plate (73).

5. The folding steering wheel device according to claim 1, characterized in that, The upper rim system (5) is located above the lower rim system (6). The upper rim system (5) and the lower rim system (6) are hinged together. Both the upper rim system (5) and the lower rim system (6) are left-right symmetrical structures. The upper rim system (5) includes an upper rim A (51) and an upper rim B (52); the lower rim system (6) includes a lower rim A (61) and a lower rim B (62). The upper rim A (51) and the upper rim B (62) are... B (52) is provided with a gear structure A. The gear structure A can drive the upper rim A (51) and the lower rim A (61), and drive the upper rim B (52) and the lower rim B (62) to rotate around the fixed shaft A (59) and the fixed shaft B (510) respectively. The rim A (61) and the lower rim B (62) are provided with a gear structure B. The gear structure B can drive the lower rim A (61) and the lower rim B (62) to rotate around the hinge.

6. The folding steering wheel device according to claim 5, characterized in that, The gear structure A includes a connecting rod B (54), a connecting block B (56), a gear B (58), a fixed shaft B (510), and a servo motor B (512). One end of the connecting rod B (54) is fixed to the upper wheel rim B (52), and the other end is fixed to one end of the connecting block B (56). The other end of the connecting block B (56) is provided with a gear B (58), which is fixed on the connecting block B (58). The gear at the output end of the servo motor B (512) meshes with the gear B (58). When the servo motor B (512) is working, it can drive the upper wheel rim B (52) and the lower wheel rim B (62) to rotate. Similarly, when the servo motor A (511) is working, it can drive the upper wheel rim A (51) and the lower wheel rim B (61) to rotate. The gear structure B includes a Z-shaped connecting rod A (63), a U-shaped connecting block A (65), a round shaft A (67), a gear C (69), a fixed shaft C (611), and a servo motor C (613). One end of the Z-shaped connecting rod A (63) is fixedly connected to the lower wheel rim A (61), and the other end is movably connected to one end of the U-shaped connecting block A (65) through the round shaft A (67). The other end of the U-shaped connecting block A (65) is provided with a gear C (69) through the fixed shaft C (611). The gear at the output end of the servo motor C (613) meshes with the gear C (69). When the servo motor C (613) is working, it can drive the lower wheel rim A (61) to rotate. Similarly, when the servo motor D (614) is working, it can drive the lower wheel rim B (62) to rotate.

7. The folding steering wheel device according to claim 1, characterized in that, The airbag system (8) includes an arc-shaped airbag A (81), an arc-shaped airbag B (82), a magnet C (83), and a magnet D (84); the arc-shaped airbag A (81) and the arc-shaped airbag B (82) are respectively placed in the lower side panel (44) and the upper side panel (41) of the box-shaped frame (4), wherein the magnet C (83) and the magnet D (84) are used to fix the ends of the arc-shaped airbag A (81) and the arc-shaped airbag B (82); the arc-shaped airbag A (81) and the arc-shaped airbag B (82) can be inflated into arc-shaped airbag A and arc-shaped airbag B respectively; the magnet A (15) and the magnet B (16) are respectively fixedly connected to the upper surface of the upper rim A (51) and the upper rim B (52); the magnet A (15) and the magnet B (16) are used to attract the magnet C (83) in the arc-shaped airbag A.

8. The folding steering wheel device according to claim 1, characterized in that, The solenoid valve A (12) shown is installed inside the hollow cylinder (47), and the axial direction of the solenoid valve A (12) is inclined downward. The inner side of the hollow cylinder (47) is connected to the steering column (9) through the solenoid valve A (12). The support rod (71) is located inside the steering column (9). Grooves A and B and through slots A and B are respectively opened at corresponding positions of the support rod (71) and the steering column (9). The solenoid valve A (12) can realize the connection between the hollow cylinder (47) and the steering column (9), and the steering column (9) and the support rod (71). By changing the magnitude of the current supplied to the solenoid valve A (12), the connection can be changed. The hollow cylinder (47) is connected to the steering column (9), and the steering column (9) is connected to the support rod (71); the steering column (9) is sleeved in the steering column sleeve (10), and the lower end of the steering column sleeve (10) is fixedly connected to the vehicle steering gear; the lower end of the support rod (71) in the planetary gear system (7) is fixedly connected to the upper end of the bellows (11), and the lower end of the bellows (11) is fixedly connected to the vehicle floor; the axial length of the bellows (11) can be scaled; the lifting device (14) is installed in the vehicle steering gear and can realize the lifting of the steering column (9) along the inner wall of the steering column sleeve (10).

9. The folding steering wheel device according to claim 1, characterized in that, It also includes an ECU (17), which controls the airbag system (8), servo motor A (511), servo motor B (512), servo motor C (613), servo motor D (614), servo motor E (712), solenoid valve A (12), solenoid valve B (13) and lifting device (14).

10. The control method for the folding steering wheel device according to any one of claims 1 to 9, characterized in that, Includes the following modes: In normal operation and full-rim use mode: ECU (17) supplies a small current to solenoid valve A (12), and the plunger in solenoid valve A (12) moves upward under the action of a low electromagnetic force. At this time, the plunger separates from the groove A of the support rod (71), thereby releasing the fixed connection between the steering column (9) and the support rod (71); at the same time, the plunger in solenoid valve A (12) is still inserted into the through groove A of the steering column (9) under the action of gravity, thereby realizing the connection between the hollow cylinder (47) and the steering column (9), and the steering column (9) and the box-shaped frame (4); when ECU (17) supplies power to solenoid valve B (13), the plunger moves upward under the action of electromagnetic force, this The plunger separates from the box frame (4), thereby releasing the connection between the support plate (2) and the box frame (4); when the driver performs a steering operation, the upper wheel flange system (5) and the lower wheel flange system (6) are rotated to achieve vehicle steering. At this time, the display screen (1) is in the initial position to avoid the accuracy and speed of the driver reading the vehicle driving information in the display screen (1) decreasing due to the steering wheel rotation; when the vehicle is involved in a frontal collision, the ECU (17) controls the servo motor C (613) and servo motor D (614) to start, and the servo motor C (613) and servo motor D (614) rotate gear C (69) and gear D (610) respectively. This causes gears C (69) and D (610) to rotate counterclockwise with the right-to-left viewing direction as the reference; then, through the force transmission of fixed shaft C (611), U-shaped connecting block A (65), round shaft A (67), and Z-shaped connecting rod A (63), the lower wheel rim A (61) rotates downward around hinge A (513); through the force transmission of fixed shaft D (612), U-shaped connecting block B (66), round shaft B (68), and Z-shaped connecting rod B (64), the lower wheel rim B (62) rotates downward around hinge B (514); finally, the lower wheel rim A (61) and lower wheel rim B (62) move away from the driver's chest. Effectively prevents the driver's chest from impacting the lower wheel rim A (61) and lower wheel rim B (62), thereby reducing the degree of chest injury; On the other hand, the ECU (17) controls the arc-shaped airbag A (81) to first expand from the folded state to the expanded state, and burst out from the lower surface of the lower side panel (44) to form the arc-shaped airbag A; Then the magnet C (83) at the end of the arc-shaped airbag A attracts the magnets A (15) and B (16) on the upper surface of the upper wheel rim A (51) and upper wheel rim B (52); Finally, the arc-shaped airbag A prevents the driver's head and chest from colliding with the display screen (1), the upper wheel rim system (5), and the box-shaped frame (4), thereby reducing the degree of injury to the driver; The full rim usage mode is changed to half rim usage mode: ECU (17) controls servo motor C (613) and servo motor D (614) to start, servo motor C (613) and servo motor D (614) rotate gear C (611) and gear D (612) respectively, so that gear C (611) and gear D (612) rotate counterclockwise and clockwise with the right-to-left viewing direction as the reference; then through the force transmission of fixed shaft C (611), U-shaped connecting block A (65), round shaft A (67) and Z-shaped connecting rod A (63) in sequence, the lower rim A (61) rotates around hinge A (513); through the force transmission of fixed shaft D (611) and ...) and U-shaped connecting block A (65) and U-shaped connecting block A (65) and U-shaped connecting block A (66) in sequence, the lower rim A (61) rotates around hinge A (513) in sequence. 2) The force transmission of the U-shaped connecting block B (66), the round shaft B (68), and the Z-shaped connecting rod B (64) enables the lower wheel flange B (62) to rotate around the hinge B (614); ultimately, the lower wheel flange A (61) and the lower wheel flange B (62) rotate 180 degrees and respectively fit with the lower surfaces of the upper wheel flange A (51) and the upper wheel flange B (52), realizing the half-wheel flange driving state, which facilitates the driver to carry out steering operation with one hand; the ECU (17) sends a small current to the solenoid valve A (12), and the plunger in the solenoid valve A (12) moves upward under the action of a low electromagnetic force. At this time, the plunger separates from the groove A of the support rod (71), thereby releasing the steering column ( 9) Connection with support rod (71); at the same time, the plunger in solenoid valve A (12) is still inserted into the through groove A of steering column (9) under the action of gravity, thereby realizing the connection between hollow cylinder (47) and steering column (9), and steering column (9) and box frame (4); when ECU (17) powers solenoid valve B (13), the plunger moves upward under the action of electromagnetic force. At this time, the plunger separates from the box frame (4), thereby releasing the fixed connection between support plate (2) and box frame (4); when the driver performs steering operation, the upper wheel flange system (5) is rotated, which can realize the steering of the vehicle. At this time, the display screen (1) is in the initial position to avoid the driver The accuracy and speed of reading vehicle driving information in the display screen (1) decrease due to steering wheel rotation; when the vehicle is involved in a frontal collision, the ECU (17) controls the arc-shaped airbag A (81) to first expand from the folded state to the expanded state, and burst out from the lower surface of the lower side panel (44) to form the arc-shaped airbag A; then the magnet C (83) at the end of the arc-shaped airbag A attracts the magnets A (15) and B (16) on the upper surface of the upper wheel rim (51) and upper wheel rim B (52); finally, the arc-shaped airbag A prevents the driver's head and chest from colliding with the display screen (1), the upper wheel rim system (5), and the box-shaped frame (4), thereby reducing the degree of injury to the driver; The full rim usage mode is changed to folding mode: First, the ECU (17) controls the servo motors C (613) and D (614) to start. The servo motors C (613) and D (614) rotate gears C (69) and D (610) respectively, so that gears C (69) and D (610) rotate counterclockwise with the right-to-left viewing direction as the reference. Then, through the force transmission of the fixed shaft C (611), U-shaped connecting block A (65), round shaft A (67), and Z-shaped connecting rod A (63), the lower rim A (61) rotates around the hinge A (513). Through the force transmission of the fixed shaft D (612), U-shaped connecting block B (66), round shaft B (68), and Z-shaped connecting rod B (64), the lower rim A (61) rotates around the hinge A (513). The force transmission effect enables the lower wheel rim B (62) to rotate around the hinge B (514); ultimately, the lower wheel rim A (61) and the lower wheel rim B (62) rotate 180 degrees and respectively fit with the lower surfaces of the upper wheel rim A (51) and the upper wheel rim B (52); in the second step, the ECU (17) controls the servo motor A (511) and the servo motor B (512) to start, and the servo motor A (511) and the servo motor B (512) respectively rotate the gear A (57) and the gear B (58), so that the gear A (57) and the gear B (58) rotate clockwise and counterclockwise respectively with the direction of observation from bottom to top as the reference; then, through the force transmission effect of the connecting block A (55) and the connecting rod A (53), the upper wheel rim A (51) and the lower wheel rim B (62) are realized. Edge A (61) rotates 90 degrees upward around fixed axis A (59); through the force transmission of connecting block B (56) and connecting rod B (54), the upper wheel edge B (52) and lower wheel edge B (62) rotate 90 degrees upward around fixed axis B (510); finally, the display screen (1) is folded into three parts: left side screen, middle screen, and right side screen; in the third step, ECU (17) cuts off the power supply to solenoid valve B (13), and the plunger in solenoid valve B (13) inserts into the groove on the upper surface of the box frame (4) under the action of gravity, thereby realizing the fixed connection between the support plate (2) and the box frame (4); when ECU (17) supplies a large current to solenoid valve A12, the plunger moves upward under the action of strong electromagnetic force, at this time the plunger and The through slot A of the steering column (9) and the groove A of the support rod (71) are separated, thereby releasing the fixed connection between the hollow cylinder (47) and the steering column (9), and between the steering column (9) and the support rod (71); in the fourth step, the ECU (17) controls the servo motor E (712) to start, and the servo motor (712) rotates the sun gear (74), so that the sun gear (74) rotates counterclockwise with the upward viewing direction as the reference; through the force transmission of planetary gear A (75), planetary gear B (76), and planetary gear C (77), the gear ring (78) rotates clockwise with the upward viewing direction as the reference; through the force transmission of the arc plate (3), the gear ring (78) drives the support plate (2) and the display screen (1) to rotate 90 degrees to the right;Finally, the box frame (4), upper wheel rim system (5), lower wheel rim system (6), airbag system (8), solenoid valve A (12), and solenoid valve B (13) rotate 90 degrees to the right; in the fifth step, the ECU (17) cuts off the power supply to solenoid valve A (12), and the plunger in solenoid valve A (12) is inserted into the through groove B of the steering column (9) and the groove B of the support rod (71) under the action of gravity, thereby realizing the fixed connection between the hollow cylinder (47) and the steering column (9), and between the steering column (9) and the support rod 71; the ECU (17) controls the lifting device (14) to realize the steering column (9) descending along the inner wall of the sleeve (10) of the steering column (9); through the force transmission action, the bellows (11) at the lower end of the support rod (71) is compressed, causing the folding steering wheel device to descend as a whole; The half-rim is used in a folding mode: First, the ECU (17) controls the servo motors A511 and B512 to start. The servo motors A (511) and B512 rotate gears A (57) and B (58) respectively, so that gears A (57) and B (58) rotate clockwise and counterclockwise respectively with the direction of observation from bottom to top as the reference. Then, through the force transmission of connecting block A (55) and connecting rod A (53), the upper rim A (51) and lower rim A (61) are rotated 90 degrees upward around the fixed axis A (59); through the force transmission of connecting block B (56) and connecting rod B (54), the upper rim A (51) and lower rim A (61) are rotated 90 degrees upward around the fixed axis A (59). The rim B (52) and the lower rim B62 rotate upwards by 90 degrees around the fixed shaft B (510); finally, the display screen (1) is folded into three parts: the left screen, the middle screen, and the right screen; in the second step, the ECU (17) cuts off the power supply to the solenoid valve B (13), and the plunger in the solenoid valve B (13) is inserted into the groove on the upper surface of the box frame (4) under the action of gravity, thereby realizing the fixed connection between the support plate (2) and the box frame (4); when the ECU (17) supplies a large current to the solenoid valve A (12), the plunger moves upwards under the action of a strong electromagnetic force. At this time, the plunger separates from the through groove A of the steering column (9), thereby releasing the hollow cylinder (47) from the steering column (9). Fixed connection; third step, ECU (17) controls servo motor E (712) to start, servo motor E (712) rotates sun gear (74), so that sun gear (74) rotates counterclockwise with the direction of observation from top to bottom as the reference; through the force transmission of planetary gear A (75), planetary gear B (76), planetary gear C (77), gear ring (78) rotates clockwise with the direction of observation from top to bottom as the reference; gear ring (78) through the force transmission of arc plate (3) drives support plate (2) and display screen (1) to rotate 90 degrees to the right, finally, box frame (4), upper wheel rim system (5), lower wheel rim system (6), airbag system (8) ), Solenoid valve A (12) and solenoid valve B (13) rotate 90 degrees to the right; in the fourth step, ECU (17) cuts off the power supply to solenoid valve A (12), and the plunger in solenoid valve A (12) is inserted into the through groove B of steering column (9) and the groove B of support rod (71) under the action of gravity, thereby realizing the fixed connection between hollow cylinder (47) and steering column (9), and steering column (9) and support rod (71); ECU (17) controls lifting device (14) to realize the steering column (9) descending along the inner wall of steering column (9) sleeve 10; through the force transmission action, the bellows (11) at the lower end of support rod (71) is compressed, causing the folding steering wheel device to descend as a whole; Folded state mode: If the vehicle is involved in a frontal collision, the ECU (17) controls the arc-shaped airbags A (81) and B (82) to first expand from the folded state to the expanded state, and they burst out from the lower surface of the lower side panel (44) and the lower surface of the upper side panel (41) respectively to form arc-shaped airbags A and B; then the magnet C (83) at the end of the arc-shaped airbag A and the magnet D (84) at the end of the arc-shaped airbag B attract each other to form a whole; finally, the arc-shaped airbags A and B work together to prevent the driver's head and chest from colliding with the display screen (1), the upper wheel rim system (5), and the box frame (4), thereby reducing the degree of injury to the driver; From folded state to full rim use mode: First, the ECU (17) cuts off the power supply to the solenoid valve A12. Under the action of gravity, the plunger in the solenoid valve A12 inserts into the through groove B of the steering column (9) and the groove B of the support rod (71), thereby realizing the fixed connection between the hollow cylinder (47) and the steering column (9), and between the steering column (9) and the support rod (71); the ECU (17) controls the lifting device (14) to realize the steering column (9) rising along the inner wall of the steering column sleeve (10). Through the force transmission, the bellows (11) at the lower end of the support rod (71) is pulled up, causing the folding steering wheel device to rise as a whole; Second, the ECU (17) cuts off the power supply to the solenoid valve B (13). In response, the plunger in solenoid valve B (13) is inserted into the groove on the upper surface of the box frame (4) under the action of gravity, thereby realizing the fixed connection between the support plate (2) and the box frame (4); when the ECU (17) supplies a large current to solenoid valve A (12), the plunger moves upward under the action of a strong electromagnetic force. At this time, the plunger separates from the through groove B of the steering column (9) and the groove B of the support rod (71), thereby releasing the fixed connection between the hollow cylinder (47) and the steering column (9), and between the steering column (9) and the support rod (71); in the third step, the ECU (17) controls the servo motor E (712) to start, and the servo motor E (712) rotates the sun gear (74), so that the sun gear (74) moves from top to bottom. With the downward observation direction as the reference, rotate clockwise. Through the force transmission of planetary gears A (75), B (76), and C (77), the gear ring (78) rotates counterclockwise with the downward observation direction as the reference. Through the force transmission of the arc plate (3), the gear ring (78) drives the support plate (2) and the display screen (1) to rotate 90 degrees to the left. Finally, the box-shaped frame (4), the upper wheel rim system (6), the lower wheel rim system (7), the airbag system (8), the solenoid valve A (12), and the solenoid valve B (13) rotate 90 degrees to the left. In the fourth step, the ECU (17) controls the servo motor A511 and the servo motor B (512) to start. Motor B (512) rotates gear A (57) and gear B (58) respectively, so that gear A (57) and gear B (58) rotate counterclockwise and clockwise respectively with the direction of observation from bottom to top as the reference; then, through the force transmission of connecting block A (55) and connecting rod A (53), the upper wheel flange A (51) and lower wheel flange A (61) rotate downward 90 degrees around the fixed shaft A (59); through the force transmission of connecting block B (56) and connecting rod B (54), the upper wheel flange B (52) and lower wheel flange B (62) rotate downward 90 degrees around the fixed shaft B (510); finally, the upper wheel flange A (51) and upper wheel flange B (52) return to their initial positions, and the display screen 1 returns to a flat surface;In the fifth step, the ECU (17) controls the servo motors C (613) and D (614) to start. The servo motors C (613) and D (614) rotate gears C (69) and D (610) respectively, so that gears C (69) and D (610) rotate clockwise with the right-to-left viewing direction as the reference. Then, through the force transmission of the fixed shaft C (611), U-shaped connecting block A (65), round shaft A (67), and Z-shaped connecting rod A63, the lower wheel rim A (61) rotates around hinge A (513). Through the force transmission of the fixed shaft D (612), U-shaped connecting block B (66), round shaft B (68), and Z-shaped connecting rod B (64), the lower wheel rim B (62) rotates around hinge B (514). Finally, the lower wheel rim A (61) and lower wheel rim B (62) rotate 180 degrees and return to their initial positions. Folding state to normal half-rim mode: First step, ECU (17) cuts off the power supply to solenoid valve A (12), and the plunger in solenoid valve A (12) is inserted into the through groove B of steering column (9) and the groove B of support rod (71) under the action of gravity, thereby realizing the fixed connection between hollow cylinder (47) and steering column (9), and steering column (9) and support rod (71); ECU (17) controls lifting device (14) to realize the steering column (9) rising along the inner wall of steering column (9) sleeve (10), and through the force transmission action, the bellows (11) at the lower end of support rod (71) is pulled up, causing the folding steering wheel device to rise as a whole; Second step, ECU (17) cuts off the power supply to solenoid valve B (12), and the plunger in solenoid valve A (12) is inserted into the through groove B of steering column (9) and support rod (71) under the action of gravity, thereby realizing the fixed connection between hollow cylinder (47) and steering column (9), and support rod (71); 3) Power supply, the plunger in solenoid valve B (13) is inserted into the groove on the upper surface of the box frame (4) under the action of gravity, thereby realizing the fixed connection between the support plate (2) and the box frame (4); when the ECU (17) supplies a large current to solenoid valve A (12), the plunger moves upward under the action of a strong electromagnetic force. At this time, the plunger separates from the through groove B of the steering column (9) and the groove B of the support rod (71), thereby releasing the fixed connection between the hollow cylinder (47) and the steering column (9), and between the steering column (9) and the support rod (71); in the third step, the ECU (17) controls the servo motor E (712) to start, the servo motor E rotates (712) to drive the sun gear (74), so that the sun gear (74) Based on the top-down viewing direction, rotate clockwise. Through the force transmission of planetary gears A (75), B (76), and C (77), the gear ring (78) rotates counterclockwise based on the top-down viewing direction. Through the force transmission of the arc plate (3), the gear ring (78) drives the support plate (2) and the display screen (1) to rotate 90 degrees to the left. Finally, the box-shaped frame (4), the upper wheel rim system (5), the lower wheel rim system (6), the airbag system (8), the solenoid valve A (12), and the solenoid valve B (13) rotate 90 degrees to the left. In the fourth step, the ECU (17) controls the servo motor A (511) and the servo motor B (512) to start. Servo motor B (512) rotates gear A (57) and gear B (58) respectively, so that gear A (57) and gear B (58) rotate counterclockwise and clockwise respectively with the direction of observation from bottom to top as the reference; then, through the force transmission of connecting block A (55) and connecting rod A (53), the upper wheel flange A (51) and lower wheel flange A (61) rotate downward 90 degrees around the fixed axis A (59); through the force transmission of connecting block B (56) and connecting rod B (4), the upper wheel flange B (52) and lower wheel flange B (62) rotate downward 90 degrees around the fixed axis B (510); finally, the upper wheel flange A (51) and upper wheel flange B (52) return to their initial positions, and the display screen returns to a flat surface.

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