Single-drive double-steering swing axle mechanism

Abstract

The utility model relates to the technical field of forward-moving forklifts, and discloses a single-drive double-steering swing axle mechanism which comprises a swing axle frame, a drive mechanism, two steering mechanisms and two walking wheels. The driving mechanism is located on the left side of the swing bridge and connected with the walking wheels to form a driving system to achieve whole vehicle walking. The two steering mechanisms are located on the two sides of the swing bridge frame respectively and connected with the walking wheels to drive the walking wheels to rotate to achieve steering. The driving mechanism and the steering mechanism are both provided with detection electrical elements, and accurate speed control and steering angle control are achieved. The steering driving assembly comprises a steering motor, a steering gear and a second steering driven gear, and the steering motor drives the steering gear to rotate to drive the walking wheels to steer. In addition, the steering system further comprises a speed change assembly which is used for adjusting the height of the steering motor, changing the transmission efficiency and achieving adjustment of the steering response speed and the steering angle under different driving conditions so as to improve driving comfort and safety.

Description

Technical Field

[0001] This utility model relates to the field of reach truck technology, specifically a single-drive dual-steering swing bridge mechanism. Background Technology

[0002] Existing reach truck swing axles are mainly divided into two types in terms of design and performance. Each type has its own unique characteristics and corresponding advantages and disadvantages, which directly affect the operating efficiency and safety of the forklift.

[0003] First, let's look at the single-drive, single-steering, swivel-wheel type forklift swing axle. This design is characterized by its relatively simple structure, containing only one drive wheel and one steering wheel. The steering wheel is typically connected to the forklift frame via a universal joint, allowing for free rotation. This design has lower manufacturing costs due to its fewer components and simpler maintenance. However, a drawback is that, with only one drive wheel, the forklift is prone to losing balance when turning, resulting in a "fishtail" phenomenon, where the rear of the forklift may exceed the operator's control. This not only affects operational stability but also increases the risk of accidents. Therefore, the operational efficiency and safety of this type of forklift are limited when used in narrow aisles.

[0004] Another type is the dual-drive, dual-steering forklift swing axle. This design features two drive wheels and two steering wheels, each independently controllable. This makes the forklift more agile when turning, effectively preventing fishtailing and improving operational stability and safety. Especially when turning in confined spaces, the dual-drive, dual-steering design offers a better handling experience. However, this design is more expensive to manufacture due to the need for more powertrain components and a more complex control system. Furthermore, dual-drive, dual-steering forklifts may not be as stable as single-drive, single-steering forklifts when traveling in a straight line, as the synchronized control of two drive wheels is more complex than that of a single drive wheel, which can affect the forklift's straight-line performance.

[0005] Against this backdrop, with the continuous rise in domestic land prices and the increasing utilization of warehouse space, the demand for economical and efficient reach truck swing bridges is growing. To address the shortcomings of existing technologies, we propose a single-drive, dual-steering swing bridge mechanism to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this utility model is to provide a single-drive, double-steering swing bridge mechanism to solve the problems mentioned in the background art. The existing reach truck swing bridges are mostly single-drive, single-steering with casters or double-drive, double-steering. The former is expensive, and the latter has the defects of fishtailing when turning and being unable to travel in a straight line.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] A single-drive, dual-steering swing bridge mechanism includes a swing bridge frame and steering mechanisms installed at both ends of the swing bridge frame. The bottom of the steering mechanism is equipped with a traveling wheel, and the steering mechanism drives the traveling wheel to rotate, thereby turning the traveling wheel. A drive mechanism is installed at one end of the swing bridge frame, and the drive mechanism is connected to the traveling wheel to form a drive system, thereby enabling the vehicle to move. Both the drive mechanism and the steering mechanism are equipped with electrical components for data detection.

[0009] The drive mechanism includes a drive component and electrical components for drive detection. The drive component includes a drive motor, a mounting base, and a gearbox. The mounting base is fixedly connected to the end of the swing bridge, and the drive motor and gearbox are respectively mounted on the upper and lower parts of the mounting base.

[0010] Preferably, the walking wheels are mounted on the output shaft of the gearbox, and the drive motor is connected to the input shaft of the drive gearbox. The gearbox changes the output torque of the drive motor from the vertical direction to the horizontal direction.

[0011] Preferably, a rotating sleeve is fixedly connected to one end of the gearbox near the mounting base, a first bearing is provided between the outer wall of the rotating sleeve and the mounting base, the shaft of the drive motor passes through the inside of the rotating sleeve and is connected to the input end of the gearbox, and a second bearing sleeve is installed between the inner wall of the rotating sleeve and the shaft of the drive motor.

[0012] Preferably, the steering mechanism includes a steering drive assembly, a mounting base, and electrical components for steering detection. The steering drive assembly includes a steering motor, a steering gear, and a second steering driven gear. The steering motor is located above the mounting base and is fixedly connected to the mounting base. The shaft of the steering motor passes through the mounting base and is fixedly connected to the steering gear. The second steering driven gear is fixedly sleeved outside the rotating sleeve of the gearbox, and the steering gear meshes with the second steering driven gear.

[0013] Preferably, the electrical components for steering detection include a speed encoder for detecting and recording the number of rotations of the steering motor and a detection element for positioning the direction of the driving wheels; the detection element is fixedly connected to the mounting base and located to the side of the steering motor; the speed encoder is located above the steering motor.

[0014] Preferably, the steering drive assembly further includes a transmission assembly; the transmission assembly includes a telescopic device for adjusting the height of the steering motor, a first steering follower, and a second steering follower.

[0015] Preferably, the first steering follower is a first steering driven gear and an intermediate gear; a rotating support is provided on the outside of the intermediate gear, one end of the rotating support is fixedly connected to the mounting base through a connecting plate, the other end of the rotating support is sleeved on the outside of the rotating sleeve, and a third bearing is installed between the rotating support and the rotating sleeve.

[0016] Preferably, the second steering driven gear serves as the second steering driven member, the diameter of the first steering driven gear is smaller than the diameter of the second steering driven gear, and the radius of the second steering driven gear is equal to the sum of the radius of the first steering driven gear and the diameter of the intermediate gear; a steering column is fixedly connected to one end of the travel wheel near the mounting base, the steering column is rotatably connected to the mounting base, the first steering driven gear and the second steering driven gear are both fixedly mounted on the steering column, and the axes of the first steering driven gear, the second steering driven gear and the steering column coincide; the edge of the intermediate gear of the first steering driven member near the steering gear is on the same straight line as the edge of the second steering driven gear of the second steering driven member near the steering gear.

[0017] Preferably, the teeth of the steering gear are chamfered at both ends, and the telescopic device consists of two sets of hydraulic telescopic cylinders. The two sets of hydraulic telescopic cylinders are symmetrically arranged on both sides of the steering motor. The external parts of the hydraulic telescopic cylinders are fixedly connected to the mounting base, the external parts of the steering motor are fixedly connected to the mounting base, and the telescopic ends of the hydraulic telescopic cylinders are fixedly connected to both sides of the mounting base.

[0018] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0019] This invention effectively solves the problem of balancing turning stability and safety, straight-line driving performance, and cost in existing reach truck swing bridges by employing a single-drive, dual-steering swing bridge mechanism. The principle is that a drive motor drives the gearbox output shaft, propelling the travel wheels forward and backward. Simultaneously, a pair of steering motors drive steering gears to mesh with driven steering gears, thus steering the travel wheels. The transmission assembly uses two sets of hydraulic cylinders to adjust the position of the steering motors, allowing the steering gears to mesh with driven steering gears of different diameters, thereby changing the transmission ratio and dynamically adjusting steering speed and precision to meet the needs of different driving conditions, such as higher steering precision at low speeds and faster steering speeds at high speeds. Furthermore, the two steering mechanisms are connected to monitoring elements and speed encoders, enabling real-time detection of the travel wheel direction and motor rotation, and transmitting feedback signals to the electrical system. This achieves precise steering control and overall vehicle speed control, significantly improving operational efficiency and safety. At the same time, this invention uses a single-drive design, reducing costs and forklift size, making it more suitable for operating in confined spaces. Attached Figure Description

[0020] Figure 1 This is a schematic side view of the overall structure of Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall bottom structure of Embodiment 1 of this utility model;

[0022] Figure 3 This is a side view of the steering mechanism according to Embodiment 2 of this utility model;

[0023] Figure 4 This is a schematic diagram of the bottom structure of the steering mechanism in Embodiment 2 of this utility model;

[0024] Figure 5 For the present utility model Figure 4 A partially enlarged structural diagram;

[0025] Figure 6 This is a schematic diagram of the speed change component structure according to Embodiment 2 of this utility model.

[0026] The components include: 1. Swinging bridge; 2. Drive mechanism; 3. Traveling wheel; 4. Steering mechanism; 5. Drive motor; 6. Mounting base; 7. Gearbox; 8. Electromagnetic brake; 9. Speed ​​encoder; 12. Rotating sleeve; 14. Steering motor; 15. Steering gear; 16. Second steering driven gear; 17. Detection element; 21. Intermediate gear; 22. Rotating support base; 23. Third bearing; 24. First steering driven gear; 25. Steering column; 26. Connecting plate; 27. Hydraulic telescopic cylinder. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1:

[0029] Please see Figure 1-6 This utility model provides a technical solution:

[0030] A single-drive, dual-steering swing bridge mechanism includes a swing bridge frame 1, a drive mechanism 2, two steering mechanisms 4, and two traveling wheels 3.

[0031] like Figure 2 As shown, the drive mechanism 2 is located on the left side of the swing bridge 1. The bottom of the swing bridge 1 is provided with a traveling wheel 3. The drive mechanism 2 is connected to the traveling wheel 3 to form a drive system, which enables the vehicle to move.

[0032] The two steering mechanisms 4 are located on both sides of the swing bridge 1. The steering mechanisms 4 are connected to the walking wheels 3 and drive the walking wheels 3 to rotate, thereby realizing the steering of the walking wheels 3.

[0033] The drive mechanism 2 and the two steering mechanisms 4 are all equipped with detection electrical components to achieve precise speed control and steering angle.

[0034] Reference Figure 1 To further explain, the drive mechanism 2 includes a drive motor 5, a mounting base 6, a gearbox 7, an electromagnetic brake 8, and a speed encoder 9.

[0035] The drive motor 5 and gearbox 7 are respectively installed on the upper and lower parts of the mounting base 6. The walking wheel 3 is installed on the output shaft of the gearbox 7. The drive motor 5 is connected to the input shaft of the drive gearbox 7 and drives the drive gearbox 7 to work. The output torque of the drive motor 5 is changed from the vertical direction to the horizontal direction through the gearbox 7, and drives the walking wheel 3 to rotate through the output shaft of the drive gearbox 7.

[0036] A rotating sleeve 12 is fixedly connected to one end of the gearbox 7 near the mounting base 6. A first bearing is provided between the outer wall of the rotating sleeve 12 and the mounting base 6. The shaft of the drive motor 5 passes through the inside of the rotating sleeve 12 and is connected to the input end of the gearbox 7. A second bearing sleeve is installed between the inner wall of the rotating sleeve 12 and the shaft of the drive motor 5, so that the rotating sleeve 12 of the gearbox 7 can rotate smoothly between the mounting base 6 and the shaft of the drive motor 5, reducing resistance and avoiding wear of components.

[0037] The electromagnetic brake 8 and speed encoder 9 are mounted above the drive motor 5. When the drive motor 5 drives the gearbox 7, the gearbox 7 transmits power to the walking wheels 3, enabling movement.

[0038] The speed encoder 9 records the number of revolutions of the drive motor 5, generates a feedback signal, and transmits it to the electrical system, thereby controlling the speed and displacement of the entire gantry vehicle and achieving positioning and speed control.

[0039] The electromagnetic brake 8 is used to control the emergency stop of the drive motor 5, thereby reducing the vehicle speed and performing emergency braking.

[0040] Reference Figure 1-2 Furthermore, the steering mechanism 4 includes a steering drive assembly, a speed encoder 9, a detection element 17, and a mounting base 6.

[0041] The steering drive assembly includes a steering motor 14, a steering gear 15, and a second steering driven gear 16.

[0042] The steering motor 14 is located above the mounting base 6 and is fixedly connected to the mounting base 6. The shaft of the steering motor 14 passes through the mounting base 6 and is fixedly connected to the steering gear 15. The second steering driven gear 16 is fixedly sleeved on the outside of the rotating sleeve 12 of the gearbox 7. The steering gear 15 meshes with the second steering driven gear 16. The steering motor 14 drives the steering gear 15 to rotate, and the steering gear 15 drives the second steering driven gear 16 to rotate. Since the rotating sleeve 12 of the gearbox 7 is fixedly connected to the second steering driven gear 16, the gearbox 7 and the traveling wheel 3 connected to the output shaft of the gearbox 7 rotate, thereby realizing the steering operation of the vehicle.

[0043] The detection element 17 is fixedly connected to the mounting base 6 and located to the side of the steering motor 14. The detection element 17 has a real-time detection function and can accurately locate the direction of the traveling wheel 3. The speed encoder 9 is located above the steering motor 14. When the steering motor 14 rotates, the speed encoder 9 can record the number of rotations of the motor. At the same time, the detection element 17 performs real-time detection and accurate positioning of the direction of the traveling wheel 3. The speed encoder 9 and the detection element 17 generate feedback signals, which are transmitted to the electrical system, thereby controlling the deflection angle of the traveling wheel 3 to achieve precise control of the steering angle or to achieve straight-line movement of the entire vehicle.

[0044] Example 2:

[0045] Please see Figure 3-6 Furthermore, in conjunction with Embodiment 1, it is further found that the steering drive assembly also includes a transmission assembly.

[0046] The transmission assembly includes a telescopic device for adjusting the height of the steering motor 14, a first steering follower, and a second steering follower;

[0047] The first steering driven component is a first steering driven gear 24 and an intermediate gear 21; a rotating support 22 is provided on the outside of the intermediate gear 21, one end of the rotating support 22 is fixedly connected to the mounting base 6 through a connecting plate 26, and the other end of the rotating support 22 is sleeved on the outside of the rotating sleeve 12. A third bearing 23 is installed between the rotating support 22 and the rotating sleeve 12.

[0048] The second steering driven gear serves as the second steering driven component. The diameter of the first steering driven gear 24 is smaller than the diameter of the second steering driven gear 16, and the radius of the second steering driven gear 16 is equal to the sum of the radius of the first steering driven gear 24 and the diameter of the intermediate gear 21.

[0049] The end of the traveling wheel 3 near the mounting base 6 is fixedly connected to a steering column 25. The steering column 25 is rotatably connected to the mounting base 6. The first steering driven gear 24 and the second steering driven gear 16 are both fixedly mounted on the steering column 25. The axes of the first steering driven gear 24, the second steering driven gear 16 and the steering column 25 coincide.

[0050] The edge of the intermediate gear 21 of the first steering follower near the steering gear 15 is on the same straight line as the edge of the second steering follower 16 near the steering gear 15. The steering motor 14 is pushed up and down by the telescopic device, so that the steering motor 14 drives the steering gear 15 to switch meshing between the first steering follower and the second steering follower, thereby changing the transmission efficiency.

[0051] Furthermore, in order to facilitate the rapid switching of the steering gear 15, the two ends of the teeth of the steering gear 15 are chamfered so that it can quickly engage with the intermediate gear 21 or the second steering driven gear 16.

[0052] This switching changes the transmission efficiency. When the steering gear 15 meshes with the larger diameter driven steering gear, the transmission ratio increases, meaning that for each rotation of the steering gear 15, the driven steering gear rotates fewer times, but the steering angle is larger, thus improving the transmission efficiency.

[0053] Conversely, when the steering gear 15 meshes with the smaller diameter driven steering gear, the transmission ratio decreases. Each time the steering gear 15 is rotated, the driven steering gear rotates more times, but the steering angle is smaller, and the transmission efficiency is relatively low.

[0054] In this way, drivers can select the appropriate gear ratio according to different driving conditions to optimize steering response speed and steering angle, thereby improving driving comfort and safety.

[0055] The telescopic device consists of two sets of hydraulic telescopic cylinders 27, which are symmetrically arranged on both sides of the steering motor 14. The external parts of the hydraulic telescopic cylinders 27 are fixedly connected to the mounting base 6 to keep them fixed. The external parts of the steering motor 14 are fixedly connected to the mounting base 6, and the telescopic ends of the hydraulic telescopic cylinders 27 are fixedly connected to both sides of the mounting base 6. The position of the steering motor 14 is adjusted by the synchronous telescopic extension and retraction of the two sets of hydraulic telescopic cylinders 27, thereby realizing the switching engagement of the transmission components.

[0056] The driving gear can be matched with steering driven gears of different diameters as needed to connect the driving gear and the steering driven gear, so that the steering action is transmitted to the wheels.

[0057] When the driver turns the steering wheel, the drive gear begins to rotate. Depending on the pairing of the drive gear with different driven gears, the rotation speed and angle of the driven gear will vary: a larger diameter driven gear paired with the drive gear results in a slower steering speed but higher steering precision. This configuration is suitable for use at low speeds, such as when parking or reversing, as more precise control is required.

[0058] When a smaller diameter driven gear meshes with the driving gear, the steering speed is faster, but the steering precision is lower. This configuration is suitable for high-speed driving because the driver needs to steer quickly to adapt to changes in speed. By switching between different driven gears, the driver can adjust the steering speed and precision according to different driving conditions.

[0059] By providing different steering responses at different speeds, drivers can control the vehicle more safely. Higher steering precision at low speeds makes it easier for the driver to control the vehicle. At high speeds, faster steering response reduces driver fatigue.

[0060] The steering configuration can be quickly switched under different driving conditions, such as city roads, highways, or off-road surfaces, to adapt to different steering needs. This steering system is designed to provide different steering responses at high and low speeds, thereby improving driving comfort and safety. In practical applications, this system typically works in conjunction with an electronic control unit to dynamically adjust the diameter of the steering driven gear based on vehicle speed and driver input to achieve optimal steering performance.

[0061] The working principle of this single-drive dual-steering swing bridge mechanism is as follows:

[0062] First, the drive motor 5 in the drive mechanism 2 converts electrical energy into mechanical energy through its input shaft connected to the gearbox 7. This mechanical energy is then transmitted to the wheels 3 via the gearbox 7, enabling the vehicle to move. The output torque of the drive motor 5 is converted from vertical to horizontal through gear transmission in the gearbox 7, ultimately driving the wheels 3 to rotate.

[0063] In terms of steering, the steering drive assembly in the steering mechanism 4 includes a steering motor 14, a steering gear 15, and a second steering driven gear 16. When the driver turns the steering wheel, the steering motor 14 starts to rotate, driving the steering gear 15 to rotate. The steering gear 15 meshes with the first steering driven gear 24 and the second steering driven gear 16, transmitting power to the rotating sleeve 12 of the gearbox 7 through the transmission system, thereby driving the wheels 3 to steer.

[0064] In addition, the steering mechanism also includes a transmission component, comprising a telescopic device for adjusting the height of the steering motor 14, a first steering follower, and a second steering follower. The telescopic device drives the steering motor 14 to rise or fall, allowing the steering gear 15 to mesh with steering follower gears of different diameters, thereby changing the transmission efficiency. When the steering gear 15 meshes with a steering follower gear of a larger diameter, the steering angle is larger; when it meshes with a steering follower gear of a smaller diameter, the steering angle is smaller.

[0065] In terms of detection and control, both the drive mechanism 2 and the steering mechanism 4 are equipped with detection electrical components. The speed encoder 9 records the number of rotations of the drive motor 5, generates a feedback signal, and transmits it to the electrical system to control the speed and displacement of the entire vehicle, achieving positioning and speed control. The detection element 17 detects the direction of the traveling wheels 3 in real time and transmits the feedback signal to the electrical system to achieve precise control of the steering angle or to achieve straight-line movement of the entire vehicle.

[0066] The electromagnetic brake 8 is used to control the emergency stop of the drive motor 5, thereby reducing the vehicle speed and performing emergency braking.

[0067] Although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these specific embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A single-drive, dual-steering swing bridge mechanism, characterized in that: The system includes a swing bridge (1) and a steering mechanism (4) installed at both ends of the swing bridge (1). The bottom of the steering mechanism (4) is equipped with a traveling wheel (3). The steering mechanism (4) drives the traveling wheel (3) to rotate, thereby turning the traveling wheel (3). One end of the swing bridge (1) is equipped with a drive mechanism (2). The drive mechanism (2) is connected to the traveling wheel (3) to form a drive system, thereby enabling the vehicle to move. Both the drive mechanism (2) and the steering mechanism (4) are equipped with electrical components for data detection. The drive mechanism (2) includes a drive component and an electrical component for drive detection. The drive component includes a drive motor (5), a mounting base (6), and a gearbox (7). The mounting base (6) is fixedly connected to the end of the swing bridge (1). The drive motor (5) and the gearbox (7) are respectively mounted on the upper and lower parts of the mounting base (6).

2. The single-drive dual-steering swing bridge mechanism according to claim 1, characterized in that: The walking wheel (3) is mounted on the output shaft of the gearbox (7), and the drive motor (5) is connected to the input shaft of the drive gearbox (7). The gearbox (7) changes the output torque of the drive motor (5) from the vertical direction to the horizontal direction.

3. The single-drive dual-steering swing bridge mechanism according to claim 2, characterized in that: A rotating sleeve (12) is fixedly connected to one end of the gearbox (7) near the mounting base (6). A first bearing is provided between the outer wall of the rotating sleeve (12) and the mounting base (6). The shaft of the drive motor (5) passes through the inside of the rotating sleeve (12) and is connected to the input end of the gearbox (7). A second bearing sleeve is installed between the inner wall of the rotating sleeve (12) and the shaft of the drive motor (5).

4. The single-drive dual-steering swing bridge mechanism according to claim 3, characterized in that: The steering mechanism (4) includes a steering drive assembly, a mounting base (6), and electrical components for steering detection. The steering drive assembly includes a steering motor (14), a steering gear (15), and a second steering driven gear (16). The steering motor (14) is located above the mounting base (6) and is fixedly connected to the mounting base (6). The shaft of the steering motor (14) passes through the mounting base (6) and is fixedly connected to the steering gear (15). The second steering driven gear (16) is fixedly sleeved on the outside of the rotating sleeve (12) of the gearbox (7). The steering gear (15) meshes with the second steering driven gear (16).

5. A single-drive dual-steering swing bridge mechanism according to claim 1, characterized in that: The electrical components used for steering detection include a speed encoder (9) for detecting and recording the number of rotations of the steering motor (14) and a detection element (17) for positioning the direction of the driving wheel (3); the detection element (17) is fixedly connected to the mounting base (6) and located on the side of the steering motor (14); the speed encoder (9) is located above the steering motor (14).

6. A single-drive dual-steering swing bridge mechanism according to claim 4, characterized in that: The steering drive assembly also includes a transmission assembly; the transmission assembly includes a telescopic device for adjusting the lifting of the steering motor (14), a first steering follower, and a second steering follower.

7. A single-drive dual-steering swing bridge mechanism according to claim 6, characterized in that: The first steering follower is a first steering follower gear (24) and an intermediate gear (21); a rotating support seat (22) is provided on the outside of the intermediate gear (21). One end of the rotating support seat (22) is fixedly connected to the mounting seat (6) through a connecting plate (26), and the other end of the rotating support seat (22) is sleeved on the outside of the rotating sleeve (12). A third bearing (23) is installed between the rotating support seat (22) and the rotating sleeve (12).

8. A single-drive dual-steering swing bridge mechanism according to claim 7, characterized in that: The second steering driven gear serves as the second steering driven member. The diameter of the first steering driven gear (24) is smaller than the diameter of the second steering driven gear (16), and the radius of the second steering driven gear (16) is equal to the sum of the radius of the first steering driven gear (24) and the diameter of the intermediate gear (21). The end of the traveling wheel (3) near the mounting base (6) is fixedly connected to the steering column (25). The steering column (25) is rotatably connected to the mounting base (6). The first steering driven gear (24) and the second steering driven gear (16) are both fixedly mounted on the steering column (25). The axes of the first steering driven gear (24), the second steering driven gear (16), and the steering column (25) coincide. The edge of the intermediate gear (21) of the first steering driven member near the steering gear (15) is on the same straight line as the edge of the second steering driven gear (16) of the second steering driven member near the steering gear (15).

9. A single-drive dual-steering swing bridge mechanism according to claim 8, characterized in that: The teeth of the steering gear (15) are chamfered at both ends. The telescopic device consists of two sets of hydraulic telescopic cylinders (27). The two sets of hydraulic telescopic cylinders (27) are symmetrically arranged on both sides of the steering motor (14). The external parts of the hydraulic telescopic cylinders (27) are fixedly connected to the mounting base (6). The external parts of the steering motor (14) are fixedly connected to the mounting base (6). The telescopic ends of the hydraulic telescopic cylinders (27) are fixedly connected to both sides of the mounting base (6).

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