178 results about "Ground pressure" patented technology

The invention discloses a yielding grouting anchor rod for a high-ground-pressure soft breakable roadway, and belongs to the technical field of roadway supporting, the yielding grouting anchor rod comprises an anchor rod body, the outer surface of the anchor rod body is sleeved with a yielding cylinder, a yielding plate and a rubber plug, the rubber plug is located on one side of the yielding cylinder, the outer surface of the yielding plate is attached to the inner surface of the yielding cylinder, and the outer surface of the yielding plate is attached to the inner surface of the yielding cylinder. A spring and evenly-arranged connecting rods are arranged on the outer wall of one side of the yielding plate, the connecting rods are located between the anchor rod and the spring, one end of each connecting rod penetrates through the inner wall of one side of the yielding cylinder to be connected with one end of a rubber plug, a sleeve is embedded in the outer surface of the rubber plug, and the outer wall of one side of the sleeve is connected with the outer wall of one side of the yielding cylinder. The pressure plate pushes the compression spring to deform, tensile fracture of the anchor rod body caused by overlarge pressure is avoided, the connecting rod is driven to push the rubber plug in the process of pushing the compression spring to deform, the dual pressure yielding and releasing function is achieved, and the anchor rod can adapt to roadway surrounding rock deformation in the high ground pressure environment to a certain extent.

According to the biped robot foot structure capable of adapting to the complex road surface, the whole foot structure is designed through modular decomposition, when a user walks on the wet and slippery flat ground, the foot obtains information of foot sole sensors on the front foot sole and the rear foot sole in real time, and the virtual constraint structure is actively controlled through an electric cylinder; stress of a front longitudinal arch sole joint is reduced, meanwhile, the ground pressure transmission direction of a foot structure is improved, the ground pressure is kept in a friction cone as much as possible, and therefore the robot is prevented from slipping; when the robot walks on an uneven road surface, the electric cylinder actively controls the ground contact angle of the front foot sole, and the spring guide rod of the rear foot sole is assisted, so that active and passive self-adaptive adjustment of the foot of the robot to the ground is realized. The electric cylinder is used as a virtual constraint structure for active control, and the spring telescopic rod structure of the rear sole imitating ligament is combined, so that active and passive self-adaption of the feet of the robot to different complex road surfaces is realized, and the adaptability of the biped robot to the complex road surfaces is improved.

The invention discloses a method for detecting the soil compaction degree of an agricultural tire, solves the problem of how to reduce the adverse consequence of soil compaction, and belongs to the field of agricultural machinery experiments. The method comprises the following steps: paving a pressure sensing film on soil to be detected, pressing a tire on the pressure sensing film at a set roll angle, counting pressure point positions and corresponding pressure values of three areas on the pressure sensing film, and further calculating the pressure sum Pt of each area; obtaining pressure weights wI, wII and wIII of the three regions according to the influence of the roll angle on the pressures of the different regions, and calculating the total pressure PD corresponding to the roll angle according to the formula: PD = PIwI + PIIwII + PIIIwIII; the total pressure PD corresponding to different roll angles theta D is obtained, and the total grounding pressure # imgabs0 # wD is calculated as the influence weight of the roll angles theta D; and calculating the total compaction degree C according to the PZ. According to the method, the influence mechanism of different roll angles of the tire on the ground pressure distribution and the soil compaction degree is quantified, and a quantitative basis is provided for optimizing the tire width, the tire pressure and mechanical operation conditions.

The invention belongs to the technical field of cross-country path planning, and provides a dynamic cross-country path planning method for land surface state simulation, which comprises the following steps: S1, acquiring a cross-country map, parameters, a starting point and an ending point of a target vehicle, current surface water content, future rainfall data, air temperature data and radiation data; s2, determining the future soil moisture content; s3, rasterizing the cross-country map, and identifying a landform type, a road surface type, a soil type and a gradient; s4, determining the size relationship between the unit grounding pressure and the future soil bearing capacity; s5, dividing a passable area R2 and an impassable area T2; s6-S9, determining air resistance, road surface resistance, horizontal subsidence resistance and slope resistance; s10, calculating the maximum driving speed of the vehicle in each grid; s11, generating a maximum driving speed matrix based on the maximum driving speed in the passable area R2 and the speed value in the impassable area T2; and S12, based on the maximum driving speed matrix, utilizing an improved A * algorithm to plan a cross-country path.

The invention provides an intelligent leveling and ground pressure self-adaption system of a modularized movable laboratory, and relates to the technical field of laboratory leveling, the system realizes high-precision leveling through six-degree-of-freedom hydraulic support legs, is equipped with pressure and displacement sensors, and is combined with spherical hinge universal joints to compensate ground inclination. And the reliability and the safety of the system are improved through the backup design of the double hydraulic pumps and the energy accumulator. The system further has a ground pressure self-adaption function, the pressure of the supporting legs is dynamically adjusted based on the ground type and a bearing capacity model, local overload is prevented, and an anti-sedimentation strategy is set. In addition, the system integrates technologies of Beidou / GNSS positioning assistance, multi-modal data fusion, block chain traceability and the like, and the leveling efficiency, stability and traceability are enhanced. The system is suitable for mobile laboratory deployment under complex terrains, and has the characteristics of high efficiency, accuracy and reliability.

The invention relates to the technical field of tire processing, in particular to a pattern and rolling resistance simulation evaluation method and system for a rubber engineering tire. The method comprises the following steps: acquiring tire pattern parameters; building a finite element model of tire-road surface contact according to the tire pattern parameters; according to the finite element model, determining deformation distribution, longitudinal tensile strain, grounding pressure distribution and pavement contact rigidity of the tire in the rolling process; and determining a rolling resistance evaluation value according to the deformation distribution, the longitudinal tensile strain, the grounding pressure distribution and the pavement contact rigidity. And rapid parameterization iteration is supported, and modeling errors caused by non-uniform geometric feature description are avoided. And the simulation accuracy and repeatability are ensured. The influence of the pattern structure on the rolling process is reflected, and a foundation is laid for a rolling resistance evaluation value. Quantitative evaluation of the tire rolling resistance is realized, data-driven design optimization is supported, and the simulation efficiency is improved.

The invention relates to the technical field of agricultural machinery intelligent control, in particular to a combine harvester track trafficability control method based on visual inspection, which comprises the following steps: S1, predicting a motion track based on the real-time traveling speed and steering angle of a harvester; s2, extracting a real-time terrain slope angle of the trajectory region; s3, determining a target grounding pressure distribution mode required by the track in the predicted track area; s4, calculating a target hydraulic flow distribution proportion used for controlling a walking motor; and S5, the hydraulic valve group is controlled to adjust the oil supply amount according to the target flow distribution proportion. Through linkage of visual perception and hydraulic control, segmented self-adaptive adjustment of the track grounding pressure is achieved, and the trafficability and operation stability of the combine harvester under complex terrains are effectively improved.

The invention belongs to the technical field of cranes, and discloses a stable feeding device for building construction, the stable feeding device comprises a crane body, the bottom end of the crane body is provided with a vehicle bottom groove, the two sides of the top end of the vehicle bottom groove are both provided with first supporting parts, and the first supporting parts are each provided with a second supporting part; deep anchor points are formed through the conical head and the ground pressure plate, first-level anchoring is formed, deflection-free downward moving positioning can be carried out for different stratums, high-strength supporting operation is achieved, the multiple sets of supporting shaft columns are adaptive to concave-convex ground through the abutting plate, multiple supporting points are expanded, second-level assistance is achieved, the number of the supporting points is increased, and the supporting area is expanded. A more stable mechanical structure is formed, lateral torque and sudden load impact can be effectively resisted, the probability of occurrence of overturning accidents is reduced, the stable state of the crane body during hoisting and feeding of building materials is guaranteed, the supporting shaft column is in linkage with the hollow ring through the supporting shaft rod, the field angle is automatically adjusted along with the anchoring depth, and load distribution is optimized.

The invention provides a fault type rock burst monitoring method, device and equipment and a storage medium, and the method comprises the steps: obtaining a target distance value between a fault and a coal seam advanced bearing pressure peak value position; obtaining a discrimination threshold value; wherein the discrimination threshold value is a distance value when the shear stress on the fault surface is equal to the shear strength of the fault surface; and monitoring the fault type rock burst based on the target distance value and the discrimination threshold value. According to the technical scheme of the invention, the method can achieve the quantification of the discrimination index for judging whether the fault-type rock burst occurs or not, and achieves the effective monitoring of the fault-type rock burst.

A multi-parameter pressure relief drilling rig and method for monitoring impact danger while drilling, relating to the field of mining engineering technology. The pressure relief drilling rig includes a coal dust collection device, a crawler walking device, an analyzer, a drilling device, a monitoring device, a fixed bracket, a support, a drill rod, a control console and a temperature sensor. Each component cooperates with each other to complete the monitoring of rock burst danger and the pressure relief and danger relief in dangerous areas; during the drilling process, the drilling rig monitors multiple parameters such as coal dust temperature, drilling speed, torque, coal dust particle ratio and drilling time, and transmits them to the analysis instrument through wireless transmission, and integrates and determines the rock burst danger; when the monitoring results show that there is an impact danger, large-diameter drilling pressure relief can be directly carried out near the location to achieve the purpose of real-time danger relief, and at the same time, the drilling parameters are monitored in real time during the drilling process. This method realizes the combination of monitoring and pressure relief, and has the advantages of convenient operation, accurate monitoring and high safety.

The invention discloses a tire wear evaluation method and device, electronic equipment and a vehicle, and relates to the technical field of vehicles. The tire wear evaluation method comprises the steps that a reference image and an image to be tested are acquired, and the reference image is a grounding mark image acquired by tire grounding pressure analysis equipment on a new tire under a preset test condition; the to-be-tested image is a grounding mark image acquired by the tire grounding pressure analysis equipment on the old tire with the driving mileage under the same preset test condition; carrying out pattern block feature extraction analysis on the reference image to generate a reference distribution map which represents the size change condition of pattern blocks on the outermost side of the new tire; carrying out pattern block feature extraction analysis on the to-be-detected image to generate a to-be-detected distribution diagram which represents the size change condition of a specific pattern block of the old tire; and analyzing according to the reference distribution diagram and the distribution diagram to be detected to obtain a wear evaluation result of the old tire. According to the invention, tire wear evaluation can be realized efficiently, reliably and intelligently.

The invention discloses a vehicle control method and a vehicle, and belongs to the technical field of vehicle control. According to the technical scheme provided by the embodiment of the invention, the vehicle can realize finer and more active escape operation by simultaneously adjusting the height of the suspension, applying the braking force and finely adjusting the steering angle. Active lifting of the suspension system can change the ground pressure of the slipping wheels, which is a function that cannot be achieved by a traditional brake or differential lock. The brake system limits idle to transmit torque. The steering system can guide the target vehicle to find the optimal escape path. Through cooperation of the multiple systems, the target vehicle can more flexibly adapt to complex road surface conditions and dynamically-changed vehicle body postures, and therefore the escape efficiency and stability of the target vehicle under extreme conditions are improved. Therefore, the problems of response delay, limited control precision and low escape efficiency caused by insufficient consideration of the dynamic change of the vehicle body attitude in related technologies are solved.

The invention relates to an underwater robot advancing control method and device and a medium, and the method comprises the steps: detecting the sliding state of a crawler belt of a robot, and obtaining operation parameters; controlling a vertical propeller system of the robot according to the sliding state of the track to adjust the ground pressure of the track and stabilize the posture of the robot; in the process of controlling the vertical thruster system, thrust instructions of all vertical thrusters are calculated and output based on the real-time posture and motion state of the robot; according to the operation parameters, dynamic interference generated by the operation tool to the robot is calculated; on the basis of the dynamic interference, compensation thrust and compensation torque which need to be provided by the horizontal propeller system are calculated, and the rotation angle of the horizontal propeller is controlled to be aligned with the thrust direction; and the compensation thrust and the compensation torque are distributed to all the horizontal propellers, and thrust instructions of the corresponding horizontal propellers are output. According to the method, high stability, high trafficability and high operation efficiency of robot advancing are achieved in an uncertain complex seabed environment.

The present invention discloses an anti-shock and shock-absorbing monkey car suitable for use in rock burst mines. The monkey car comprises a vertical pole, the top of which is connected to a sling, the bottom of which is fixedly provided with a downwardly inclined and forwardly extending footrest, with a composite baffle disposed above the footrest; an arc-shaped frame is connected to the composite baffle, the arc-shaped frame being welded together by three steel arc tubes via connecting rods, and the arc-shaped frame is open and closed as a whole; a seat plate is supported on the vertical pole by a support rod, and the seat plate and the support rod are softly connected by a damping shock absorber; a backrest is disposed in the middle of a steel arc tube, and the backrest is softly connected to the steel arc tube in which it is located by another damping shock absorber. The anti-shock and shock-absorbing monkey car of the present invention can fully guarantee the personal safety of passengers in the event of natural disasters, mechanical accidents, or improper operation.

This invention belongs to the field of tire manufacturing technology and discloses a non-pneumatic tire, including a tire body. The tire body includes a rim, a support body, and a tread ring. The support body includes a first ring, a second ring, a first support leg, and a second support leg. The first ring is fixedly connected to the rim. This invention, by setting up the first ring, second ring, first support leg, and second support leg, provides a stable inner force-bearing foundation for the support body. The second ring evenly bears the force transmitted by the tread ring. The first and second support legs form an elastic frame that adaptively deforms and absorbs vibration under stress. Furthermore, the structure of the support legs and the through-holes allows for a more uniform distribution of stiffness and ground pressure, effectively reducing vehicle vibration and improving ride stability. The synergistic cooperation of multiple structures significantly enhances the elastic buffering capacity of the support body, effectively suppressing wheel deformation under heavy loads or impact loads, further enhancing driving safety.

The utility model belongs to the technical field of material conveying equipment, and discloses a material transport vehicle. The material transport vehicle comprises a vehicle body, a cable and an anti-dragging device, the cable is connected with the vehicle body and comprises a plug, and the plug can be connected with an external power source; the anti-dragging device comprises an electric mortise lock assembly and a pull rod assembly, the electric mortise lock assembly is connected with the vehicle body, the pull rod assembly is movably connected with the vehicle body, the electric mortise lock assembly is electrically connected with the cable, and the electric mortise lock assembly is used for locking the pull rod assembly in the state that the pull rod assembly abuts against the ground. According to the material transport vehicle, impact on the plug and an external power supply caused by huge inertia generated by dragging the vehicle body when the plug is not pulled out is avoided, and potential safety hazards of electricity utilization are eliminated.

The invention discloses a sampling device for deep mine exploration, which can quickly adapt to exploration sites with different topographic features through position adjustment of a fixed shaft in a movable groove and locking of a fastening nut, and can effectively disperse the weight of the device and reduce the ground pressure through combination of a symmetrical support plate and an angle-adjustable bearing plate. Reliable supporting can be achieved on rugged or soft sites; the hydraulic cylinder is adopted for driving and is matched with the limiting plate for guiding, the lifting process is stable and free of deviation, the depth requirements of exploration of different deep underground mines can be accurately met, the adjusting precision is higher, the response speed is higher, and stable height support is provided for the sampling mechanism; the sampling mechanism adopts a double-collection-assembly synchronous operation mode, a driver can adaptively adjust the output torque according to the stratum hardness, and by combining with a sampling groove rotating at a high speed, multi-depth and high-fidelity ore rock samples can be efficiently collected; the spraying mechanism is linked with the monitoring unit to realize intelligent temperature control and dust falling, so that sampling friction high temperature is effectively reduced, the service life of parts is prolonged, and dust diffusion can be inhibited.

The utility model discloses roadway mine pressure monitoring equipment, which comprises a fixed pipe, a telescopic supporting rod, a sliding rod and an extrusion ring, the outer side wall of the fixed pipe is fixedly connected with a limiting block, the inner bottom of the limiting block is fixedly connected with three rotating shafts in a circumferential array, and the top end of the telescopic supporting rod is rotatably sleeved on the surfaces of the rotating shafts; the bottom of the telescopic supporting rod is fixedly connected with a bottom block, the top end of the bottom block is fixedly connected with a servo motor, and the bottom of the bottom block under the servo motor is rotationally connected with a grinding wheel. The extrusion ring is in threaded sleeve connection with the outer surface of the fixing pipe through a threaded groove formed in the surface of the fixing pipe below the limiting block, and the extrusion ring is located under the limiting block; the telescopic supporting rod is extruded and limited by arranging the limiting block and the extruding block, so that the telescopic supporting rod is fixedly supported, and the stability of the device is improved.

The invention provides an anti-rock-burst return airway advance support method and device, and the method comprises the steps: deploying a mining crawler-type carrier and a plurality of advance supports in an advance region of a return airway, and supporting the advance region of the return airway; a crawler-type unit support and a plurality of hydraulic supports with super-large working resistance are arranged in the air return roadway to support the air return roadway; after the coal mining machine finishes cutting one knife of coal, moving a plurality of forepoling and a plurality of hydraulic supports with super-large working resistance; when the forepoling is moved, the forepoling located at the rearmost end of the forepoling area is moved to the foremost end of the forepoling area in a descending mode through a mining crawler-type carrier in the mode that one forepoling is carried each time, the area where the forepoling is moved is temporarily supported through the crawler-type unit supports, and after the crawler-type unit supports are withdrawn, the forepoling is moved. And the hydraulic support with the super-large working resistance is moved in a stepping mode. According to the supporting method, disturbance of stress of the return airway can be reduced, the phenomenon of sudden stress release is reduced, and the continuous supporting capacity of the return airway is improved.

This utility model discloses a folding device for the rear support wheel of a hooklift truck based on dual-cylinder drive, relating to the field of special vehicle technology. It includes a first part and a second part, with the first part located at the top of the second part. The first part consists of a longitudinal beam fixedly connected to the frame via U-bolts. A fixing frame is welded to one end of the longitudinal beam, and symmetrically arranged upper supports are welded to one side of the fixing frame. This utility model uses dual-cylinder synchronous control of the support wheel to avoid failure risks, resulting in more stable unfolding / folding actions. The dual cylinders can also distribute the force, making the ground pressure on the support wheel more uniform and improving safety during heavy-duty operations. The folded support wheel is close to the frame to reduce the turning radius and avoid interference with obstacles. It effectively solves the problems of uneven unfolding of traditional mechanical support wheels and frame deformation caused by uneven loading of hydraulic single cylinders, significantly improving the operating efficiency and reliability of hooklift trucks in scenarios such as garbage transfer and equipment loading / unloading.

The utility model discloses a ground pressure bearing device which comprises a connecting block, first supporting blocks are arranged on the two sides, the front portion and the rear portion of the outer portion of the connecting block, second supporting blocks are arranged on the outer sides of the first supporting blocks, third supporting blocks are arranged on the outer sides of the second supporting blocks, fourth supporting blocks are arranged on the outer sides of the third supporting blocks, and the fourth supporting blocks are arranged on the outer sides of the fourth supporting blocks. Sliding grooves are further included and formed in the four corners of the outer wall of the connecting block and the four corners of the outer sides of the first supporting block, the second supporting block and the third supporting block, four sliding rods are welded to the inner sides of the first supporting block, the second supporting block, the third supporting block and the fourth supporting block correspondingly, and one ends of the sliding rods extend into the sliding grooves correspondingly; the sliding rods are in sliding fit with the sliding grooves. According to the pressure-bearing device, the overall structure of the pressure-bearing device can be adjusted, the pressure-bearing device can adapt to the grounds of different sizes and tests with different pressure requirements through all-directional adjustment, and the applicability of the pressure-bearing device in various test scenes is greatly improved.

The application discloses a kind of based on deep neural network's tire ground pressure distribution form prediction method, method includes: generating simulation sample;Calibration is carried out to simulation sample, and calibration sample is obtained;Performing physical information-driven data enhancement operation, integration generates multi-working condition sample library;Deep neural network model is built;Deep neural network model is iteratively trained and model weight solidification is completed, and prediction model is obtained;It is predicted;The deep neural network of the application is constructed by encoder-decoder architecture, and the tire ground pressure distribution calculation that traditional finite element simulation needs several hours to complete is compressed to millisecond order, and the technical bottleneck of time-consuming physical simulation is broken through.In the absence of any physical sample, only by inputting structure design parameters and working condition parameters, the pressure distribution form covered in full working condition can be obtained in real time, supporting the rapid screening and optimization iteration of hundreds of tire structure schemes in a single day, significantly shortening the tire development cycle.

The utility model relates to a telescopic tractor anti -rollover counterweight block mechanism, including frame, the adaptive board of installation in the top of frame, the counterweight ring of installation in the position of approaching four around of frame, the counterweight frame is equipped with with the counterweight ring coaxial setting of following rotation box in the extension position of both sides of frame, the adaptive board is used for adapting tractor chassis installation, and the counterweight ring and following rotation box are used for adapting tractor wheel anti -rollover installation, and the telescopic sleeve and the external cylinder of connection are all set up in both ends of counterweight frame, and the cylinder drives telescopic sleeve to approach or to be far from counterweight block, and the floating air bag is used as longitudinal buffer and compensation device, when tractor climbs, downhill or passes through undulating terrain causes the equal difference change of front and rear axle load, and the floating air bag can actively inflate and deflate, and the dynamic jacks up or releases counterweight ring, and shares the axle impact load, and the stability of auxiliary keeps the front and rear wheel ground pressure, thereby effectively promotes fuel economy, and improves the maneuverability of steering and driving, realizes the perfect unity of safety and efficiency.

The utility model discloses a variable load road roller, it includes frame and sets up the walking mechanism and load adjusting mechanism in the lower part of frame, wherein walking mechanism includes the front drive axle of hinged connection in the bottom of frame front side and the rear drive axle of hinged connection in the bottom of frame rear side, and load adjusting mechanism includes the multiple groups of loading wheel of setting between front drive wheel and rear drive wheel, and loading wheel hinged connection is established on the support axle, and the end of this support axle is hinged fixed on the rocker and crank, wherein the other end of crank is hinged connection with the crank axle of setting on one side of support axle, and the crank axle is hinged connection with the hinged seat of installing on the frame, and the other end of rocker is hinged connection with the loading cylinder telescopic end of setting on the other side of support axle, and loading cylinder is hinged installed on the frame through hinged seat, and the loading wheel can be through the control loading cylinder action to realize to the pressure intensity of carrying out to the road surface through the road surface rolling pressure belt, and then realizes the quick adjustment of road roller to the ground pressure intensity.

The invention provides a construction method for controlling the ground pressure of a goaf by a room-and-pillar method through interval type dry material filling, and belongs to the technical field of mining engineering. According to the method, a discontinuous supporting system is constructed in a goaf by utilizing the natural accumulation characteristic of a discrete material. The method comprises the following specific steps: firstly, actually measuring goaf roof and jamb states to plan a path; a filling control section is calibrated with 20-30 meters as the standard in the excavation advancing direction, the space between one to two rows of ore pillars is selected in the section to serve as a stress bearing core area, and the rest space serves as a ground pressure release cavity area; then, dry materials are conveyed in a mechanical throwing and filling mode, a blanking point is controlled to take a natural repose angle as a boundary, and a local stable accumulation body for supporting the top plate is formed under the condition that a manual retaining wall is not needed. According to the method, construction is sequentially propelled, so that the filled sections and the unfilled sections are alternately distributed, an interval supporting structure combining rigid supporting and flexible pressure relief is formed, and a construction strategy is dynamically adjusted according to monitoring data.

The invention relates to the technical field of tire production, in particular to a tire design method for improving the road holding force of a tire based on finite element analysis, and the method comprises the following steps: establishing a parameterized 3D tire model; setting a change gradient interval of the sidewall width and establishing a correlation formula; performing grid division on the parameterized 3D tire model; superposing constraint conditions on the parameterized 3D tire model; adjusting the sidewall width according to the change gradient interval, and synchronously adjusting the groove depth; generating a new tire model; performing dynamic rolling simulation, and extracting a grounding pressure distribution cloud picture; and outputting parameters of the 3D tire model. According to the method, through deep fusion of parametric modeling and finite element simulation, namely through accurate parameter matching, the tire structure defects are reduced, the risk of local excessive wear is reduced, and a foundation is laid for prolonging the service life; and through an orthogonal test and a stratified sampling strategy, the parameter optimization efficiency is improved, invalid research and development links are reduced, and the research and development period is shortened.

The utility model belongs to the field of reinforcing device, concretely relates to a kind of impact ground pressure roadway help part reinforcing device, including roadway, the vertical help part of both sides of roadway is uniformly pasted with reinforcing seat, the reinforcing seat is hollow shell, the inboard of reinforcing seat is fixedly connected with multiple evenly distributed wedge pegs, the wedge peg is embedded in the vertical help part of roadway, the vertical help part side of reinforcing seat away from roadway is contacted with baffle, the side of baffle away from reinforcing seat is fixedly connected with clamping groove, the inside of clamping groove is clamped with clamping block, and inner thread sleeve is fixedly connected on the clamping block.The utility model is driven by the thread of two-way screw rod and inner thread sleeve, can be adjusted the compaction force of two sides reinforcing seat to the vertical help part of roadway simultaneously, cooperate wedge peg embedding rock mass and internal concrete filling, form the multiple protection system of initiative support and passive reinforcement combination, to further improve the impact ground pressure capacity of roadway.

This utility model belongs to the field of tire processing technology, specifically relating to a high-saturation buoyancy agricultural tire. It includes a bead, sidewall, and crown. The crown consists of tread blocks and tread grooves. The tread blocks are composed of symmetrical patterns of varying areas, with a tread saturation of 50%-52%; the tread depth is 15mm-28mm; the tread groove angle is 16°-20°, and the groove bottom curvature is 3mm-6mm; the longitudinal arc Rc of the tread blocks is 16mm-30mm, the transverse arc Rd=Rc-2mm, and the connecting reverse arc Re is 90mm-130mm. This utility model increases the contact area through high saturation, reducing ground pressure and allowing the tire to "float" on the ground, minimizing damage to grasslands. Combined with shallow depth, symmetrical distribution, and optimized groove design, it improves traction, self-cleaning properties, and wear and puncture resistance, making it suitable for agricultural operations such as lawns and grasslands where surface protection is required.

The application discloses a ground leveling robot, which comprises an electrical system, a leveling execution head connected with the electrical system, and a screw propeller assembled on the electrical system, wherein the electrical system is electrically connected with the screw propeller and the leveling execution head. The screw propeller is used to replace the existing track chassis, so that the problem of large ground pressure of the ground leveling robot can be solved, the deformation of the steel bars in the un-solidified concrete can be reduced, the surface of the screw propeller is smooth, the screw propeller has buoyancy, and thus the cleaning is convenient, the screw propeller is not prone to being stuck, and the feasibility is remarkably improved.

This invention relates to the field of roadbed strength, specifically to a method for detecting the strength of highway roadbeds based on a semi-empirical modified curve. This invention records the pressure and displacement during impact using sensors on a falling weight deflectometer, calculates the vertical displacement of the road surface, selects a Beckman beam deflectometer and a test vehicle, installs the Beckman beam deflectometer between the two rear wheels of the test vehicle, corrects the test vehicle parameters, calculates the deflection value, corrects the diameter of the left and right tires of the test vehicle to 22.35 cm, and corrects the ground pressure of the left and right tires of the test vehicle to 0.75 MPa. The vertical displacement and deflection values ​​measured in steps (2) and (3) are recorded and compared with the national highway roadbed strength standard, thereby achieving rapid detection of roadbed strength without damaging the road structure. Furthermore, the test vehicle can be used to detect and evaluate the road smoothness of the selected road.