Bidirectional driving electric vehicle suitable for short-wheelbase steering in narrow roadway

Abstract

The invention relates to the technical field of underground electric transportation equipment, and discloses a bidirectional driving electric vehicle suitable for short-wheelbase steering in a narrow roadway, which comprises a vehicle body, a first frame arranged at the bottom of the vehicle body, a second frame arranged at the bottom of the first frame, a front axle arranged on the left side of the bottom of the second frame, and a rear axle arranged on the right side of the bottom of the second frame. Magnetic attraction assemblies are fixedly connected to the tops of the front axle and the rear axle, a plurality of driving assemblies electrically connected with the magnetic attraction assemblies are slidably arranged at the bottom of the second frame, a plurality of elastic dampers are fixedly connected to the bottom of the second frame, and sliding rings sliding outside the driving assemblies are rotatably connected to the inner wall of the second frame. According to the invention, through the magnetic attraction linkage of the first electromagnet and the second electromagnet among the front axle, the rear axle and the second frame, the vehicle body can be driven to realize about 30-degree single steering around the axis of the top column, and multiple repeated operations are supported to adjust the angle, so that the trafficability and the steering flexibility of the vehicle in a narrow roadway are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of underground electric transport equipment technology, and more particularly to a bidirectional electric vehicle suitable for short-wheelbase steering in narrow tunnels. Background Technology

[0002] Underground electric transport equipment technology is a specialized transport technology adapted to the unique underground environment. Its core focuses on optimizing the electric drive system to achieve efficient material and personnel transfer. Replacing traditional fuel power with an electric motor, and equipped with a dedicated transmission device and intelligent control system, it boasts advantages such as low energy consumption, zero emissions, and low noise. Through wireless communication, positioning, and navigation technologies, it can improve transport accuracy and safety, making it a key supporting technology for intelligent and green underground mining.

[0003] Based on this technology, bidirectional electric material transport vehicles have become a targeted application. They can travel in both directions without turning around, and are equipped with an explosion-proof electric system and a large-capacity battery, providing sufficient range for long-term underground operations. The vehicles are equipped with a bidirectional control console and safety warning devices, allowing for flexible transfer of materials, equipment parts, and other supplies. They perfectly combine the safety and efficiency of electric transport technology, significantly improving the flexibility and efficiency of underground material handling.

[0004] However, in the existing technology, some underground vehicles are limited by the steering structure design, and the single steering angle is fixed and large. They cannot flexibly adjust the steering range according to the actual width of the narrow tunnel. They need to reverse and adjust the vehicle posture multiple times before they can continue to turn. The operation is cumbersome and time-consuming, and it is difficult to adapt to the complex and ever-changing steering needs of narrow underground tunnels.

[0005] Therefore, a bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways is proposed to address the above problems. Summary of the Invention

[0006] To overcome the above shortcomings, this invention provides a bidirectional electric vehicle suitable for short-wheelbase steering in narrow tunnels. It aims to improve the problem that some underground vehicles in the prior art have a fixed and large single steering angle, requiring multiple reversing and vehicle posture adjustments to continue steering, making it difficult to adapt to the complex and ever-changing steering requirements of narrow underground tunnels.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways includes a vehicle body. A frame one is located at the bottom of the vehicle body, and a frame two is located at the bottom of the frame one. A front axle is located on the left side of the bottom of the frame two, and a rear axle is located on the right side of the bottom of the frame two. Magnetic assemblies are fixedly connected to the top of both the front and rear axles. Multiple drive components electrically connected to the magnetic assemblies are slidably arranged at the bottom of the frame two. Multiple elastic dampers are fixedly connected to the bottom of the frame two. A slip ring sliding outside the drive components is rotatably connected to the inner wall of the frame two. A top column is fixedly connected to the top of the drive shaft of the drive components. A groove is formed on the surface of the top column, and the groove is generally zigzag-shaped. A top ring is rotatably connected to the outside of the top column. A ball bearing rolling on the inner wall of the groove is movably connected to the inner wall of the top ring. Two connecting plates fixedly connected to the inner wall of the frame two are fixedly connected to the outside of the top ring.

[0009] As a further description of the above technical solution:

[0010] The magnetic attraction assembly includes an electromagnet one fixedly connected to the top of the front axle and the rear axle, and electromagnet two is fixedly connected to the bottom left and right sides of the frame two, and the electromagnet two can form a magnetic attraction cooperation with the electromagnet one.

[0011] As a further description of the above technical solution:

[0012] The drive assembly includes a hydraulic rod slidably connected to the bottom of the second frame. The hydraulic rod is electrically connected to two electromagnets. A fixed plate is slidably connected to the outside of the hydraulic rod. A support column is fixedly connected to the top of the fixed plate. The other end of the support column is fixedly connected to the bottom of the second frame. The drive end of the hydraulic rod is slidably connected to the inner wall of a slip ring. The bottom of the top column is fixedly connected to the top of the drive shaft of the hydraulic rod.

[0013] As a further description of the above technical solution:

[0014] The bottom of each elastic damper is fixedly connected to the top of the fixed plate, and with the central axis of the second frame as the symmetrical reference, two elastic dampers are set on each of its left and right sides. The two elastic dampers on each side form a group, and the two groups of elastic dampers are symmetrically distributed.

[0015] As a further description of the above technical solution:

[0016] The hydraulic rod is externally rotatably connected to a threaded sleeve one, the threaded sleeve one is externally threaded to a threaded sleeve two, the bottom of the threaded sleeve two is fixedly connected to a chassis, the bottom of the chassis is movably connected to multiple balls, and the bottom of the chassis is fixedly connected to multiple scrapers.

[0017] As a further description of the above technical solution:

[0018] The threaded sleeve 2 is rotatably connected to a rotating ring, and a plurality of connecting rods that slide on the inner wall of the fixed disk are fixedly connected to the outside of the rotating ring. A limit disk is fixedly connected to the top of the connecting rod, and a spring is sleeved on the outside of the connecting rod.

[0019] As a further description of the above technical solution:

[0020] One end of the spring is fixedly connected to the top of the fixed plate, and the other end of the spring is fixedly connected to the bottom of the limiting plate.

[0021] As a further description of the above technical solution:

[0022] Two limiting strips are fixedly connected to the drive shaft of the hydraulic rod. The outer side of the limiting strip is slidably connected to the inner wall of the slip ring, and the inner wall of the slip ring is slidably connected to the outer side of the hydraulic rod.

[0023] As a further description of the above technical solution:

[0024] A counterweight is fixedly connected to the top of the top column, and the bottom of the counterweight is in contact with the top of the top ring.

[0025] The present invention has the following beneficial effects:

[0026] 1. In this invention, the magnetic attraction linkage between the front axle, the rear axle and the frame of the two electromagnets can precisely trigger the hydraulic rod drive assembly to work. Combined with the guide and limiting structure of the top column slide groove and the top ring ball, the vehicle body can be driven to achieve a single turn of about 30 degrees around the top column axis. It also supports multiple repeated operations to adjust the angle, which solves the problem of difficult turning and U-turns caused by the wheelbase limitation of traditional underground vehicles, and greatly improves the vehicle's passability and turning flexibility in narrow tunnels.

[0027] 2. In this invention, during the process of the chassis being moved down by the hydraulic rod, the scraper at the bottom of the chassis rotates synchronously with the meshing transmission of threaded sleeve one and threaded sleeve two, which can actively clean up impurities on the steering path, avoid impurities affecting the support effect of the ball bearings when they contact the ground, further improve the safety and reliability of the vehicle during steering and driving, and reduce the interference of complex underground road conditions on equipment operation. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram of a bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways, as proposed in this invention.

[0029] Figure 2 This is a schematic diagram of the second frame structure of the bidirectional electric vehicle with short wheelbase steering suitable for narrow alleyways, as proposed in this invention.

[0030] Figure 3This is a schematic diagram of the structure of an electromagnet for a bidirectional electric vehicle with a short wheelbase that is suitable for steering in narrow alleys, as proposed in this invention.

[0031] Figure 4 This is a schematic diagram of the connecting plate of the bidirectional electric vehicle with short wheelbase steering in narrow alleyways proposed in this invention.

[0032] Figure 5 This is a schematic diagram of the fixed disk structure of the bidirectional electric vehicle with short wheelbase steering suitable for narrow alleyways proposed in this invention.

[0033] Figure 6 This is a schematic diagram of the threaded sleeve of the bidirectional electric vehicle with short wheelbase steering in narrow alleyways proposed in this invention.

[0034] Figure 7 This is a schematic diagram of the ball bearing structure of the bidirectional electric vehicle with short wheelbase steering suitable for narrow alleyways, as proposed in this invention.

[0035] Figure 8 This is a schematic diagram of the top column structure of the bidirectional electric vehicle with short wheelbase steering suitable for narrow alleyways, as proposed in this invention.

[0036] Legend:

[0037] 1. Vehicle body; 2. Frame 1; 3. Frame 2; 4. Front axle; 5. Rear axle; 6. Electromagnet 1; 7. Electromagnet 2; 8. Support column; 9. Fixed plate; 10. Elastic damper; 11. Hydraulic rod; 12. Threaded sleeve 1; 13. Threaded sleeve 2; 14. Rotary ring; 15. Connecting rod; 16. Limiting plate; 17. Spring; 18. Chassis; 19. Ball bearing; 20. Scraper; 21. Limiting strip; 22. Slip ring; 23. Top column; 24. Counterweight; 25. Slide groove; 26. Top ring; 27. Slip ball; 28. Connecting plate. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Reference Figures 1 to 8This invention provides an embodiment of a bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways, comprising a vehicle body 1, which provides an overall mounting base and bears transportation requirements; a frame 2 is provided at the bottom of the vehicle body 1, which serves as an intermediate support connecting the vehicle body 1 and a second frame 3, and can also be unloaded through an internal lifting mechanism; a second frame 3 is provided at the bottom of the first frame 2, which provides a mounting carrier for various functional components and ensures structural integrity, and can also be unloaded through another lifting mechanism; a front axle 4 is provided on the bottom left side of the second frame 3, which can trigger steering commands and provide an installation reference for the magnetic suction assembly; a rear axle 5 is provided on the bottom right side of the second frame 3, which can trigger steering commands and provide an installation reference for the magnetic suction assembly.

[0040] Both the top of the front axle 4 and the rear axle 5 are fixedly connected to magnetic assemblies, which realize the mechanical and electrical signal linkage of the steering signal. The magnetic assemblies include an electromagnet 6 fixedly connected to the top of the front axle 4 and the rear axle 5; electromagnets 7 are fixedly connected to the left and right sides of the bottom of the chassis 3. When the vehicle needs to turn in a narrow alley, the steering command is triggered by operating the front axle 4 or the rear axle 5, which immediately conducts the power supply circuit of the electromagnet 6 on the top of the front axle 4 and the rear axle 5, and simultaneously controls the power supply circuit of the electromagnets 7 on the left and right sides of the bottom of the chassis 3. Through polarity matching design, the electromagnets 6 and 7 quickly generate magnetic fields in the same direction, forming a stable magnetic attraction. When confirmed... Once engaged, a "linkage ready" electrical signal can be fed back, confirming the steering command to the closed loop and achieving precise linkage between the mechanical structure and the electrical signal, thus completing the mechanical and electrical linkage of the steering signal. Furthermore, electromagnet 2 7 can form a magnetic attraction engagement with electromagnet 1 6. Multiple drive components electrically connected to the magnetic attraction assembly are slidably installed at the bottom of frame 2 3. The drive components provide power output for the steering action and drive related components to complete lifting and rotation. The drive components include a hydraulic rod 11 slidably connected to the bottom of frame 2 3. The hydraulic rod 11 receives the signal from the magnetic attraction assembly and starts working, which can overcome the force of the elastic damper 10 and the suspension system to achieve lifting and lowering, providing the core driving force for steering.

[0041] The hydraulic rod 11 is electrically connected to two electromagnets 7. A fixed plate 9 is slidably connected to the outside of the hydraulic rod 11. The fixed plate 9 provides installation support points for the elastic damper 10, the support column 8, and the connecting rod 15, ensuring the stability of the component installation. The support column 8 is fixedly connected to the top of the fixed plate 9, which fixes the fixed plate 9 to the frame 3, strengthening the structural support strength. The other end of the support column 8 is fixedly connected to the bottom of the frame 3. Multiple elastic dampers 10 are fixedly connected to the bottom of the frame 3. The elastic dampers 10 work together with the suspension system to provide a buffering force, and at the same time provide an elastic restoring force for the hydraulic rod 11 to return to its original position. The bottom of each elastic damper 10 is fixedly connected to the top of the fixed plate 9, and is symmetrical about the central axis of the frame 3. Two elastic dampers 10 are set on each of its left and right sides. The two elastic dampers 10 on each side form a group, and the two groups of elastic dampers 10 are symmetrically distributed.

[0042] The hydraulic rod 11 is externally rotatably connected to a threaded sleeve 12, which meshes with a threaded sleeve 13 to provide transmission support for the rotation of the chassis 18. The threaded sleeve 12 is externally threaded to a threaded sleeve 13, which drives the chassis 18 to achieve a linkage action of upward micro-movement and horizontal rotation. The threaded sleeve 13 is externally rotatably connected to a rotating ring 14, which connects the threaded sleeve 13 to a connecting rod 15, ensuring the stability of force transmission when the chassis 18 rotates. The rotating ring 14 is externally fixedly connected to multiple connecting rods 15 that slide on the inner wall of the fixed plate 9. The connecting rods 15 limit the movement trajectory of the chassis 18 in lifting and rotating, ensuring coaxiality. The top of the connecting rod 15 is fixedly connected to a limiting plate 16, which limits the spring 17, preventing the spring 17 from falling off and ensuring the elastic effect. The connecting rod 15 is externally sleeved with a spring 17, which ensures the smoothness of the chassis 18 in rotation and lifting, and stores elastic potential energy for component reset.

[0043] One end of spring 17 is fixedly connected to the top of fixed plate 9, and the other end of spring 17 is fixedly connected to the bottom of limiting plate 16. A chassis 18 is fixedly connected to the bottom of threaded sleeve 13. The chassis 18 provides a mounting carrier for the ball bearings 19 and scraper blades 20, achieving the dual function of supporting the vehicle body 1 and driving the sweeping action. Multiple ball bearings 19 are movably connected to the bottom of the chassis 18. When the ball bearings 19 contact the ground, they provide support for the chassis 18; when retracted, they facilitate the vehicle body 1's suspended turning; when the support is restored, they ensure the vehicle body 1 smoothly returns to the ground. Multiple scraper blades 20 are fixedly connected to the bottom of the chassis 18. The scraper blades 20 sweep dust along the turning path as the chassis 18 rotates. Impurities such as stones are removed to prevent them from affecting the stability of the support. Two limiting strips 21 are fixedly connected to the drive shaft of the hydraulic rod 11. The limiting strips 21 drive the slip ring 22 to move synchronously, ensuring the coordination of movement between the slip ring 22 and the hydraulic rod 11. The inner wall of the frame 2 3 is rotatably connected to the slip ring 22, which slides outside the drive assembly. The drive end of the hydraulic rod 11 is slidably connected to the inner wall of the slip ring 22. When the hydraulic rod 11 is driven, its drive end, that is, the thin rod part of the hydraulic rod 11, will slide on the inner wall of the slip ring 22. The slip ring 22, in conjunction with the limiting strips 21, transmits power and is rotatably connected to the inner wall of the frame 2 3, ensuring smooth steering.

[0044] The outer side of the limiting strip 21 is slidably connected to the inner wall of the slip ring 22, and the inner wall of the slip ring 22 is slidably connected to the outer side of the hydraulic rod 11. A top column 23 is fixedly connected to the top of the drive shaft of the drive assembly. The top column 23 rises and falls with the drive shaft of the hydraulic rod 11. It achieves guidance and limitation through the cooperation of the sliding groove 25 and the sliding ball 27, driving the vehicle body 1 to rotate around its own axis. The bottom of the top column 23 is fixedly connected to the top of the drive shaft of the hydraulic rod 11, and a counterweight 24 is fixedly connected to the top of the top column 23. The counterweight 24 provides additional pressure for the downward movement of the hydraulic rod 11, helping to overcome the buffering force. A sliding groove 25 is opened on the surface of the top column 23. The sliding groove 25 is generally zigzag-shaped, and the sliding groove 25 forms a guide for the sliding ball 27. The top ring 26 is forced to rotate the vehicle body 1 along a fixed trajectory. The top ring 26 is rotatably connected to the outside of the top column 23. The top ring 26 transmits the guiding and limiting force to the second frame 3 through the connecting plate 28, causing the vehicle body 1 to rotate synchronously. The bottom of the counterweight block 24 contacts the top of the top ring 26. The inner wall of the top ring 26 is movably connected to a ball bearing 27 that rolls on the inner wall of the slide groove 25. The ball bearing 27 rolls in the slide groove 25 to reduce friction and ensure smooth relative movement between the top column 23 and the top ring 26. The top ring 26 is fixedly connected to two connecting plates 28 that are fixedly connected to the inner wall of the second frame 3. The connecting plates 28 fix the top ring 26 to the second frame 3, realizing power transmission to drive the vehicle body 1 to turn.

[0045] Working Principle: When the vehicle needs to turn in a narrow alley, a steering command is triggered by controlling the front axle 4 or the rear axle 5. This immediately activates the power supply circuits of the electromagnets 6 at the top of the front axle 4 and the rear axle 5, and simultaneously controls the power supply circuits of the electromagnets 7 on the left and right sides at the bottom of the chassis 3. Through polarity matching design, electromagnets 6 and 7 quickly generate magnetic fields in the same direction, forming a stable magnetic attraction. Once the attraction is confirmed, a "linkage ready" electrical signal is fed back, completing the confirmation of the steering command to the closed loop, achieving precise linkage between the mechanical structure and the electrical signal, and completing the mechanical and electrical linkage of the steering signal. This signal is synchronously transmitted to the hydraulic rod 11, which is electrically connected to the electromagnet 7, activating the drive assembly. Under the weight of the hydraulic rod 11 itself and the pressure of the counterweight 24 at the top of the top column 23, the hydraulic rod 11 moves downward against the combined force of the elastic damper 10 and the suspension system. When the hydraulic rod 11 drives the chassis 18 to move down until the bottom ball bearing 19 contacts the ground, the threaded sleeve 12 and threaded sleeve 13 on the outside of the hydraulic rod 11 engage and transmit power. The threaded sleeve 13 drives the chassis 18 to move slightly upward while rotating horizontally. The scraper 20 at the bottom of the chassis 18 simultaneously sweeps away dust and stones on the turning path to prevent foreign objects from affecting the stability of the support. The rotating ring 14 on the outside of the threaded sleeve 13 slides with the inner wall of the fixed plate 9 through multiple connecting rods 15. The spring 17 between the limiting plate 16 at the top of the connecting rod 15 and the fixed plate 9 ensures the coaxiality and stability of the chassis 18's rotation and lifting, and also stores elastic potential energy for subsequent reset. At the same time, the suspension system adapts to the attitude changes of the chassis 18 in real time to maintain the balance of the vehicle body 1.

[0046] As the hydraulic rod 11 continues to drive, the ball bearings 19 at the bottom of the chassis 18 retract into the chassis 18. The hydraulic rod 11 is driven upwards, and the limiting strip 21 on the drive shaft drives the slip ring 22 to move synchronously. The inner wall of the slip ring 22 slides with the hydraulic rod 11 and is rotatably connected to the inner wall of the frame 23. The top column 23 moves upwards with the drive shaft, and the groove 25 on its surface guides and limits the ball bearings 27 on the inner wall of the top ring 26, forcing the top ring 26 to drive the frame 23 and the entire vehicle body 1 to rotate about 30 degrees around the axis of the top column 23 through the connecting plate 28. At this time, the vehicle body 1 is in a suspended state supported by the chassis 18. The suspension system temporarily releases the ground buffering effect because the vehicle body 1 is suspended, focusing on maintaining the structural stability of the vehicle body 1 and completing a single short-distance turn.

[0047] If a 30-degree turning angle does not meet the passage requirements, the above operation can be repeated until the requirements are met. After the turn is completed, reverse the operation of the front axle 4 or the rear axle 5 to unlock the magnetic attraction between electromagnet 6 and electromagnet 7, and disconnect the drive circuit of hydraulic rod 11. Under the combined action of the elastic restoring force of elastic damper 10, the rebound action of spring 17, and the restoring characteristics of the suspension system, components such as hydraulic rod 11, chassis 18, and top column 23 are reset in sequence, the ball bearing 19 extends to restore support, the vehicle body 1 falls back to the ground, the suspension system restarts the ground buffer function, and the entire narrow alley short wheelbase turning process is completed.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways, comprising a vehicle body (1), characterized in that: The bottom of the vehicle body (1) is provided with a frame one (2), the bottom of the frame one (2) is provided with a frame two (3), the bottom left side of the frame two (3) is provided with a front axle (4), the bottom right side of the frame two (3) is provided with a rear axle (5), the top of the front axle (4) and the rear axle (5) are both fixedly connected with magnetic assemblies, the bottom of the frame two (3) is slidably provided with multiple drive components electrically connected to the magnetic assemblies, the bottom of the frame two (3) is fixedly connected with multiple elastic dampers (10), the bottom of the frame two (3) is... The inner wall is rotatably connected to a slip ring (22) that slides outside the drive assembly. The top of the drive shaft of the drive assembly is fixedly connected to a top column (23). The surface of the top column (23) is provided with a sliding groove (25). The sliding groove (25) is generally zigzag-shaped. The outside of the top column (23) is rotatably connected to a top ring (26). The inner wall of the top ring (26) is movably connected to a ball bearing (27) that rolls on the inner wall of the sliding groove (25). The outside of the top ring (26) is fixedly connected to two connecting plates (28) that are fixedly connected to the inner wall of the frame (3).

2. The bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways according to claim 1, characterized in that: The magnetic attraction assembly includes an electromagnet 1 (6) fixedly connected to the top of the front axle (4) and the rear axle (5), and electromagnets 2 (7) are fixedly connected to the bottom left and right sides of the frame 2 (3), and electromagnets 2 (7) can form a magnetic attraction cooperation with electromagnet 1 (6).

3. The bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways according to claim 2, characterized in that: The drive assembly includes a hydraulic rod (11) slidably connected to the bottom of the frame (3). The hydraulic rod (11) is electrically connected to two electromagnets (7). A fixed plate (9) is slidably connected to the outside of the hydraulic rod (11). A support column (8) is fixedly connected to the top of the fixed plate (9). The other end of the support column (8) is fixedly connected to the bottom of the frame (3). The drive end of the hydraulic rod (11) is slidably connected to the inner wall of the slip ring (22). The bottom of the top column (23) is fixedly connected to the top of the drive shaft of the hydraulic rod (11).

4. The bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways according to claim 3, characterized in that: The bottom of each elastic damper (10) is fixedly connected to the top of the fixed plate (9), and with the central axis of the frame (3) as the symmetrical reference, two elastic dampers (10) are set on each of its left and right sides. The two elastic dampers (10) on each side form a group, and the two groups of elastic dampers (10) are symmetrically distributed.

5. The bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways according to claim 3, characterized in that: The hydraulic rod (11) is externally rotatably connected to a threaded sleeve one (12), the threaded sleeve one (12) is externally threadedly connected to a threaded sleeve two (13), the bottom of the threaded sleeve two (13) is fixedly connected to a chassis (18), the bottom of the chassis (18) is movably connected to multiple balls (19), and the bottom of the chassis (18) is fixedly connected to multiple scrapers (20).

6. The bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways according to claim 5, characterized in that: The threaded sleeve 2 (13) is rotatably connected to a rotating ring (14), and the rotating ring (14) is fixedly connected to a plurality of connecting rods (15) that slide on the inner wall of the fixed disk (9). The top of the connecting rod (15) is fixedly connected to a limiting disk (16), and a spring (17) is sleeved on the outside of the connecting rod (15).

7. The bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways according to claim 6, characterized in that: One end of the spring (17) is fixedly connected to the top of the fixed plate (9), and the other end of the spring (17) is fixedly connected to the bottom of the limiting plate (16).

8. The bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways according to claim 3, characterized in that: Two limiting strips (21) are fixedly connected to the drive shaft of the hydraulic rod (11). The outer side of the limiting strip (21) is slidably connected to the inner wall of the slip ring (22), and the inner wall of the slip ring (22) is slidably connected to the outer side of the hydraulic rod (11).

9. The bidirectional electric vehicle suitable for short-wheelbase steering in narrow alleyways according to claim 1, characterized in that: The top of the top column (23) is fixedly connected to a counterweight (24), and the bottom of the counterweight (24) is in contact with the top of the top ring (26).

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