A new energy sightseeing vehicle steering mechanism with a steering gap compensation

Abstract

This invention discloses a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation, comprising: a steering knuckle, wherein the steering knuckle has a groove and a ball joint connecting groove inside, a steering shaft is slidably connected to the inner surface of the ball joint connecting groove, a pawl slider mechanism is fixedly connected to the inner surface of the groove, a hydraulic rod and a spring are fixedly connected to the upper outer surface of the pawl slider mechanism, the steering shaft and a limiting block are tightly fitted to the other outer surface of the pawl slider mechanism, a spring is fitted to the outer surface of the actuating end of the hydraulic rod, a block is fixedly connected to the outer surface of the hydraulic rod, the groove is fixedly connected to the lower surface of the block, a steering knuckle tailstock is tightly fitted to the outer surface of the steering knuckle, and a washer is pressed onto the outer surface; through the coordinated use of the above components, the device achieves the effect of automatically compensating for steering mechanism clearance during operation while ensuring long-term stable use.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle engineering technology, and in particular to a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation. Background Technology

[0002] As a widely used mode of transportation in enclosed or semi-enclosed areas such as scenic spots, parks, and communities, the reliability, precision, and operational comfort of the steering system of new energy sightseeing vehicles directly affect driving safety and user experience. Because sightseeing vehicles typically involve low speeds, frequent steering, and large load variations, their steering mechanisms (especially the gear-rack and worm gear meshing pairs in the steering transmission chain) inevitably develop clearances (or "play") over long-term use due to component wear, assembly errors, or material deformation. These clearances gradually increase with prolonged use.

[0003] When steering clearance exists in the steering mechanism, it can lead to a series of adverse effects: 1. Reduced steering precision: When the driver turns the steering wheel, they must first overcome the clearance to steer the wheels, resulting in noticeable "free travel" in the steering wheel. There is a lag between the steering command and the actual wheel response, reducing the precision of handling. 2. Reduced response sensitivity: The clearance prevents the steering system from responding quickly to the driver's small steering inputs in the initial stage, making the steering feel vague and sluggish. 3. Deterioration in driving stability: When driving straight, the clearance may cause the vehicle to experience slight, unexpected "velocity" due to road bumps or crosswinds. The driver needs to constantly make minor adjustments to the steering wheel to correct this, increasing driving fatigue. 4. Abnormal tire wear: The small wheel wobble or delayed response caused by steering clearance will exacerbate irregular tire wear, shorten tire life, and increase operating costs. 5. In situations requiring emergency avoidance or precise control, excessive steering clearance may delay steering response time or lead to inaccurate steering control, posing certain safety hazards.

[0004] To overcome the steering play problem, some attempts have been made in existing technologies. For example, one approach involves placing rubber elastic elements (such as rubber blocks or pads) at key contact points. This approach may involve placing rubber components with specific shapes at the input or output ends of the steering gear, utilizing the elastic deformation of the rubber to fill or compensate for any gaps. However, this compensation scheme based on rubber elastic elements has significant limitations: 1. Insufficient wear resistance: Sightseeing vehicles operate extremely frequently, and under continuous and repeated compression, friction, and shear stress, the rubber material wears much faster than metal parts. Once the rubber wear exceeds its initial compression, the compensation effect will quickly fail, and new, larger gaps may even appear. 2. Poor durability and stability: Rubber materials are susceptible to environmental factors (such as temperature changes, ozone, and oil corrosion), leading to aging, hardening, cracking, or permanent deformation (plastic deformation). This results in changes in its elastic modulus, a decrease or even loss of compensation force, making it impossible to maintain the compensation effect stably and long-term. 3. Limited and non-adjustable compensation capacity: The elastic deformation and compensating force of rubber are limited, and once installed, its pre-compression and compensation capacity are fixed. It can only compensate for the initial set or a small range of gap increase. When the wear exceeds the rubber's maximum elastic compensation range, or when it needs to adapt to different wear stages, this solution is ineffective. 4. High-temperature performance degradation: High temperatures in the engine compartment or operating environment accelerate rubber aging and significantly reduce its elasticity, further weakening the compensation effect.

[0005] Therefore, although the existing steering clearance compensation scheme based on elastic elements such as rubber protrusions has a relatively simple structure, it has fatal flaws such as poor wear resistance, easy aging, limited compensation capacity and unsustainability of the material. In practical applications, especially in sightseeing vehicles that require frequent and reliable steering, it is difficult to fundamentally solve the problem of steering clearance increasing with the extension of use time, and it cannot effectively guarantee the accuracy, sensitivity and reliability of the steering system in the long term. Summary of the Invention

[0006] The purpose of this invention is to solve the technical problems existing in the prior art and to provide a steering mechanism for new energy sightseeing vehicles with steering clearance compensation. This invention aims to solve the problem that existing sightseeing vehicle steering mechanisms fail to take into account the frequent use of the equipment during operation, resulting in rapid wear of the single rubber component, which leads to reduced vehicle stability, easy damage to parts, and reduced ride comfort.

[0007] This invention introduces a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation, comprising: a steering knuckle, wherein the steering knuckle has a groove and a ball joint connecting groove inside, a steering shaft is slidably connected to the inner surface of the ball joint connecting groove, and a chuck slider mechanism is fixedly connected to the inner surface of the groove. The chuck slider mechanism drives the chuck to achieve radial opening and closing action through the linear movement of the slider and the inclined plane transmission structure, thereby accurately clamping or releasing the workpiece. This mechanical transmission method is existing technology. A hydraulic rod and a spring are fixedly connected to the upper outer surface of the chuck slider mechanism. The steering shaft and a limit stop are tightly fitted to the outer surface of the other end of the chuck slider mechanism. A spring is fitted to the outer surface of the working end of the hydraulic rod. A stop is fixedly connected to the outer surface of the hydraulic rod. The groove is fixedly connected to the lower surface of the stop. A steering knuckle tailstock is tightly fitted to the outer surface of the steering knuckle. A washer is pressed onto the outer surface of the steering knuckle. A spring washer is pressed onto the outer surface of the washer. By using the above components together, the device can automatically avoid gaps during frequent use and automatically compensate for gaps.

[0008] According to the present invention, a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation is provided. A fixing bolt is attached to the inner surface of the spring washer and the inner surface of the fixing bolt is threaded to a steering knuckle and a steering knuckle tailstock. Through the coordinated use of these components, a robust device structure is achieved.

[0009] According to the present invention, a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation is provided. A second fixing bolt is attached to the inner surface of the spring washer and the inner surface of the second fixing bolt is threadedly connected to a steering knuckle and a steering knuckle tailstock. Through the coordinated use of these components, a reasonable structural design is achieved.

[0010] According to the present invention, a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation is provided. A fixing bolt three is attached to the inner surface of the spring washer and the inner surface of the fixing bolt three is threadedly connected to a steering knuckle and a steering knuckle tailstock. Through the coordinated use of these components, a robust device structure is achieved.

[0011] According to the present invention, a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation is provided. The inner surfaces of the spring washer and the washer are fitted with four fixing bolts. The side surfaces of the four fixing bolts are threadedly connected to a steering knuckle and a steering knuckle tailstock. A high-torque shaft is fixedly connected to the outer surface of the steering knuckle tailstock, and a steering column tube is fixedly connected to the outer surface of the high-torque shaft. Through the coordinated use of these components, a robust device structure is achieved.

[0012] According to the present invention, a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation is provided. The steering knuckle has a second groove inside, and a second claw-slider mechanism is fixedly connected to the inner surface of the second groove. A hydraulic rod and a spring are fixedly connected to the upper outer surface of the second claw-slider mechanism. Through the coordinated use of these components, a robust device structure is achieved.

[0013] According to the present invention, a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation is provided. The steering knuckle has a groove three inside, and a claw-slider mechanism three is fixedly connected to the inner surface of the groove three. A hydraulic rod and a spring are fixedly connected to the upper outer surface of the claw-slider mechanism three. Through the coordinated use of these components, the device achieves flexible clearance compensation.

[0014] According to the present invention, a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation is provided. The steering column tube has a steering wheel mounting groove inside, and a steering wheel connecting bolt is threaded into the inside of the steering wheel mounting groove. Through the coordinated use of these components, a robust structure and easy installation are achieved.

[0015] According to the present invention, a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation is provided. The hydraulic rod, together with claw slider mechanism one, claw slider mechanism two, and claw slider mechanism three, constitute a closed-loop compensation unit. When the steering shaft is subjected to steering force and generates positive displacement, the claw slider mechanism one compresses the spring and triggers the hydraulic rod to retract, so that the end of the slider continuously abuts against the surface of the steering shaft. When the steering force is removed or reversed, the hydraulic rod automatically releases its stroke based on the oil circuit pressure difference, pushing the claw slider mechanism one to move in the opposite direction along the groove one, compensating for the mechanical clearance caused by the return. The spring provides initial preload, and the hydraulic rod provides dynamic damping force. The two work together to eliminate bidirectional steering clearance.

[0016] According to the present invention, a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation is provided, wherein each of the three contact surfaces of the claw slider mechanism one, claw slider mechanism two, and claw slider mechanism three with the steering shaft is provided with a self-lubricating wear-resistant layer, and the self-lubricating wear-resistant layer is composed of the following structure:

[0017] Substrate layer: Laser-clad nickel-based alloy layer, thickness 0.3-0.5mm, hardness ≥HRC 55;

[0018] Functional layer: microporous embedded solid lubricant, pore size 50-100μm, filled with molybdenum disulfide-graphene composite paste;

[0019] Surface layer: polytetrafluoroethylene penetrating coating, friction coefficient ≤0.08.

[0020] The beneficial effects of this invention are:

[0021] 1. Significantly improves steering response sensitivity and control immediacy: By introducing an innovative steering clearance compensation mechanism, this invention can eliminate or significantly reduce the assembly clearance and wear clearance of each connecting pair in the steering transmission chain (from the steering wheel to the steering wheel) in real time and dynamically. This effectively eliminates the problems of "steering wheel free travel" or "steering play" in traditional steering mechanisms, greatly improving the control sensitivity and driving directness of sightseeing vehicles in low-speed curves, narrow areas, or when precise operation is required.

[0022] 2. Significantly improves steering control precision and vehicle tracking performance: The elimination of steering clearance directly solves the problems of steering command transmission distortion and positioning ambiguity caused by clearance accumulation. When continuously steering, returning to center, or maintaining straight driving, the vehicle can more stably follow the predetermined trajectory, significantly reducing the phenomena of "floating," "drifting," or "overcorrection" caused by clearance, thus improving driving stability and safety, especially when driving on long straight roads or at high speeds.

[0023] 3. Effectively reduces abnormal tire wear and extends tire life: The clearance compensation mechanism of this invention significantly suppresses uncontrolled micro-shaking of the wheel, enabling the tire to maintain a more stable ground contact posture and rolling direction during driving, especially when driving in a straight line. The tire wear pattern tends to be more uniform and normal rolling wear, which greatly reduces the abnormal wear rate and wear pattern caused by steering clearance, directly extending the tire's service life and reducing the operation and maintenance costs of the sightseeing vehicle.

[0024] 4. Enhanced rigidity and integrity of the steering system, improving driving feel: The clearance compensation mechanism of this invention provides continuous preload to the steering transmission chain, significantly improving the rigidity of the entire steering system. The feedback information from the road surface to the driver is also clearer and more direct, avoiding the loose, vague, or even "kickback" feeling caused by clearance, thus improving the overall driving feel and confidence.

[0025] 5. Extend the lifespan of steering system components: Although the compensation mechanism itself may add a few parts, by eliminating backlash, it reduces the impact load, vibration and abnormal relative motion caused by backlash in the transmission chain. This improves the working environment of key load-bearing components such as gears, racks, ball joints and bearings, making the force more stable and reducing the wear rate. This helps to extend the service life of the core components of the entire steering system and reduce the long-term failure rate.

[0026] 6. Improved ride comfort: Reduced uncontrolled micro-swaying of wheels caused by steering clearance helps reduce the subtle vibrations and noise transmitted to the vehicle body, improving the ride smoothness and comfort for sightseeing bus passengers. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0028] Figure 1 This is a perspective view of the steering mechanism of the new energy sightseeing vehicle with steering clearance compensation according to the present invention.

[0029] Figure 2 This is a front view of the steering mechanism of the new energy sightseeing vehicle with steering clearance compensation according to the present invention.

[0030] Figure 3 This is a left view of the steering mechanism of the new energy sightseeing vehicle with steering clearance compensation according to the present invention.

[0031] Figure 4 This is a top view of the steering mechanism of the new energy sightseeing vehicle with steering clearance compensation according to the present invention.

[0032] Figure 5 This is a bottom view of the steering mechanism of the new energy sightseeing vehicle with steering clearance compensation according to the present invention.

[0033] Legend:

[0034] 1. Steering knuckle; 2. Groove 1; 3. Groove 2; 4. Groove 3; 5. Claw slider mechanism 1; 6. Claw slider mechanism 2; 7. Claw slider mechanism 3; 8. Steering knuckle tailstock; 9. Spring washer; 10. Washer; 11. Fixing bolt 1; 12. Fixing bolt 2; 13. Fixing bolt 3; 14. Fixing bolt 4; 15. Stop; 16. Hydraulic rod; 17. Ball joint connecting groove; 18. High torque shaft; 19. Steering column tube; 20. Steering wheel connecting bolt; 21. Spring; 22. Steering wheel mounting groove; 23. Steering shaft; 24. Limit stop; 25. Self-lubricating wear-resistant layer. Detailed Implementation

[0035] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0036] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5This invention discloses a steering mechanism for a new energy sightseeing vehicle with steering clearance compensation, comprising: a steering knuckle 1, the steering knuckle 1 having a groove 2 and a ball joint connecting groove 17 internally, a steering shaft 23 slidably connected to the inner surface of the ball joint connecting groove 17, and a chuck slider mechanism 5 fixedly connected to the inner surface of the groove 2. The chuck slider mechanism 5 drives the chuck to achieve radial opening and closing action through the linear movement of the slider and the inclined plane transmission structure, thereby accurately clamping or releasing the workpiece. This mechanical transmission method is existing technology. A hydraulic rod 16 and a spring 21 are fixedly connected to the upper outer surface of the chuck slider mechanism 5, and the steering shaft 23 and a limit stop 24 are tightly fitted to the other outer surface of the chuck slider mechanism 5. The spring 21 is fitted to the outer surface of the working end of the hydraulic rod 16, and a stop 15 is fixedly connected to the outer surface of the hydraulic rod 16. The groove 2 is fixedly connected to the lower surface of the stop 15. A steering knuckle tailstock 8 is tightly fitted to the outer surface of a steering knuckle. A washer 10 is pressed onto the outer surface of the washer 10. A spring washer 9 is pressed onto the outer surface of the washer 10. A fixing bolt 11 is fitted to the inner surface of the spring washer 9 and the washer 10. The side surface of the fixing bolt 11 is threaded to connect the steering knuckle 1 and the steering knuckle tailstock 8. A fixing bolt 12 is fitted to the inner surface of the spring washer 9 and the washer 10. The side surface of the fixing bolt 12 is threaded to connect the steering knuckle 1 and the steering knuckle tailstock 8. A fixing bolt 13 is fitted to the inner surface of the spring washer 9 and the washer 10. The side surface of the fixing bolt 13 is threaded to connect the steering knuckle 1 and the steering knuckle tailstock 8. A fixing bolt 14 is fitted to the inner surface of the spring washer 9 and the washer 10. The side surface of the fixing bolt 14 is threaded to connect the steering knuckle 1 and the steering knuckle tailstock 8. A high-torque shaft 18 is fixedly connected to the outer surface of the steering knuckle tailstock 8. A steering column tube 19 is fixedly connected to the outer surface of the high-torque shaft 18.

[0037] During use, the hydraulic rod 16 and spring 21 will continuously ensure that the first claw slider mechanism 5, the second claw slider mechanism 6 and the third claw slider mechanism 7 are tightly attached to the steering shaft 23. At the same time, the limiting block 24 outside the steering shaft is also attached to the side surface of the first claw slider mechanism 5, the second claw slider mechanism 6 and the third claw slider mechanism 7 to prevent the occurrence of play caused by the increase of gap.

[0038] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4Inside the steering knuckle 1, there is a second groove 3. The inner surface of the second groove 3 is fixedly connected to a second claw slider mechanism 6. The upper outer surface of the second claw slider mechanism 6 is fixedly connected to a hydraulic rod 16 and a spring 21. Inside the steering knuckle 1, there is a third groove 4. The inner surface of the third groove 4 is fixedly connected to a third claw slider mechanism 7. The upper outer surface of the third claw slider mechanism 7 is fixedly connected to a hydraulic rod 16 and a spring 21. Inside the steering column tube 19, there is a steering wheel mounting groove 22. The steering wheel mounting groove 22 is threadedly connected to a steering wheel connecting bolt 20.

[0039] In this invention, the steering wheel mounting groove 22 and the steering wheel connecting bolt 20 connected inside it make the device connection more secure, and ultimately achieve the effect of automatically compensating for the steering mechanism clearance during operation while ensuring long-term stable use.

[0040] The working principle of this invention is as follows: During use, the hydraulic rod 16 and the spring 21 continuously ensure that the first pawl slider mechanism 5, the second pawl slider mechanism 6, and the third pawl slider mechanism 7 are tightly fitted to the steering shaft 23. At the same time, the limiting block 24 on the outside of the steering shaft is also fitted to the side surface of the first pawl slider mechanism 5, the second pawl slider mechanism 6, and the third pawl slider mechanism 7 to prevent the occurrence of play caused by the increase of clearance. The steering wheel mounting groove 22 and the steering wheel connecting bolt 20 connected inside make the device connection more secure, and finally achieve the effect of automatically compensating for the clearance of the steering mechanism during operation while ensuring long-term stable use.

[0041] It should also be noted that the hydraulic rod 16, together with the first chuck slider mechanism 5, the second chuck slider mechanism 6, and the third chuck slider mechanism 7, constitute a closed-loop compensation unit. When the steering shaft 23 is subjected to steering force and undergoes positive displacement, the first chuck slider mechanism 5 compresses the spring 21 and triggers the hydraulic rod 16 to contract, so that the end of the slider continuously abuts against the surface of the steering shaft 23. When the steering force is removed or reversed, the hydraulic rod 16 automatically releases its stroke based on the oil circuit pressure difference, pushing the first chuck slider mechanism 5 to move in the opposite direction along the groove 2, compensating for the mechanical clearance caused by the return. The spring 21 provides the initial preload, and the hydraulic rod 16 provides the dynamic damping force; the two work together to eliminate bidirectional steering clearance. In this invention, the contact surfaces of the first chuck slider mechanism 5, the second chuck slider mechanism 6, and the third chuck slider mechanism 7 with the steering shaft 23 are each provided with a self-lubricating wear-resistant layer 25. The self-lubricating wear-resistant layer 25 is composed of the following structure:

[0042] Substrate layer: Laser-clad nickel-based alloy layer, thickness 0.3-0.5mm, hardness ≥HRC 55;

[0043] Functional layer: microporous embedded solid lubricant, pore size 50-100μm, filled with molybdenum disulfide-graphene composite paste;

[0044] Surface layer: Polytetrafluoroethylene (PTFE) penetrating coating, coefficient of friction ≤0.08. The self-lubricating wear-resistant layer 25 solves the problem of wear caused by high-frequency contact motion of the compensation mechanism, and the three-layer composite wear-resistant structure can greatly extend the service life of the components.

[0045] This invention, through an innovative steering clearance compensation design, effectively solves the core defect of excessive clearance in existing new energy sightseeing vehicle steering mechanisms. Its most prominent benefit lies in completely or significantly eliminating steering play, achieving "zero-delay" and "high-fidelity" steering response. This simultaneously improves handling sensitivity, steering precision, driving stability, and safety, while significantly reducing abnormal wear on tires and the steering system itself, extending the lifespan of key components, and ultimately enhancing the overall driving performance, passenger comfort, and economy of the sightseeing vehicle. This compensation mechanism has a reasonable structure, significant and sustainable compensation effect, and possesses significant practical value and market potential.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Although the applicant has described the present invention in detail with reference to preferred embodiments, those skilled in the art should understand that any modifications or equivalent substitutions made to the technical solutions of the present invention cannot depart from the spirit and scope of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A steering mechanism for a new energy sightseeing vehicle with steering clearance compensation, characterized in that, include: Steering knuckle (1), the steering knuckle (1) is provided with a groove (2) and a ball joint connecting groove (17) inside, a steering shaft (23) is slidably connected to the inner surface of the ball joint connecting groove (17), a claw slider mechanism (5) is fixedly connected to the inner surface of the groove (2), a hydraulic rod (16) and a spring (21) are fixedly connected to the upper outer surface of the claw slider mechanism (5), a steering shaft (23) and a limiting block (24) are tightly attached to the other outer surface of the claw slider mechanism (5), a spring (21) is attached to the outer surface of the working end of the hydraulic rod (16), a block (15) is fixedly connected to the outer surface of the hydraulic rod (16), a groove (2) is fixedly connected to the lower surface of the block (15), a steering knuckle tail seat (8) is tightly attached to the outer surface of the steering knuckle tail seat (8), a washer (10) is pressed onto the outer surface of the washer (10), and a spring washer (9) is pressed onto the outer surface of the washer (10).The inner surfaces of the spring washer (9) and the washer (10) are fitted with a fixing bolt one (11). The side surface of the fixing bolt one (11) is threadedly connected to the steering knuckle (1) and the steering knuckle tail seat (8). The inner surfaces of the spring washer (9) and the washer (10) are fitted with a fixing bolt two (12). The side surface of the fixing bolt two (12) is threadedly connected to the steering knuckle (1) and the steering knuckle tail seat (8). The inner surfaces of the spring washer (9) and the washer (10) are fitted with a fixing bolt three (13). The side surface of the fixing bolt three (13) is threadedly connected to the steering knuckle (1) and the steering knuckle tail seat (8). The spring washer (9) and the washer (10) are fitted with a fixing bolt one (11). The side surface of the fixing bolt three (13) is threadedly connected to the steering knuckle (1) and the steering knuckle tail seat (8). The inner surface of the steering knuckle is fitted with four fixing bolts (14), and the side surface of the four fixing bolts (14) is threadedly connected to the steering knuckle (1) and the steering knuckle tailstock (8). The outer surface of the steering knuckle tailstock (8) is fixedly connected to a high torque shaft (18), and the outer surface of the high torque shaft (18) is fixedly connected to a steering column tube (19). The steering knuckle (1) has a second groove (3) inside, and the inner surface of the second groove (3) is fixedly connected to a second claw slider mechanism (6). The upper outer surface of the second claw slider mechanism (6) is fixedly connected to a hydraulic rod (16) and a spring (21). The steering knuckle (1) has a third groove (4) inside. The inner surface of the steering column tube (19) is fixedly connected to a third pawl slider mechanism (7). The upper outer surface of the third pawl slider mechanism (7) is fixedly connected to a hydraulic rod (16) and a spring (21). The steering column tube (19) is provided with a steering wheel mounting groove (22). The steering wheel mounting groove (22) is threadedly connected to a steering wheel connecting bolt (20). The hydraulic rod (16), together with the first pawl slider mechanism (5), the second pawl slider mechanism (6), and the third pawl slider mechanism (7), form a closed-loop compensation unit. When the steering shaft (23) is subjected to steering force and produces a positive displacement, the first pawl slider mechanism (5) compresses the spring (21) and triggers the hydraulic rod (16). 6) Contraction, so that the end of the slider continuously abuts against the surface of the steering shaft (23); when the steering force is removed or reversed, the hydraulic rod (16) automatically releases its stroke based on the oil circuit pressure difference, pushing the first claw slider mechanism (5) to move in the opposite direction along the first groove (2) to compensate for the mechanical clearance caused by the return; the spring (21) provides the initial preload force, and the hydraulic rod (16) provides the dynamic damping force, and the two work together to eliminate the bidirectional steering clearance; the first claw slider mechanism (5), the second claw slider mechanism (6) and the third claw slider mechanism (7) are respectively provided with a self-lubricating wear-resistant layer (25) on the contact surface with the steering shaft (23), and the self-lubricating wear-resistant layer (25) is composed of the following structure: Substrate layer: It is a laser-clad nickel-based alloy layer with a thickness of 0.3-0.5 mm and a hardness ≥ HRC 55; Functional layer: It is a microporous embedded solid lubricant with a pore size of 50-100μm, filled with molybdenum disulfide-graphene composite paste; Surface layer: It is a polytetrafluoroethylene penetrating coating with a friction coefficient ≤0.08.

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