101 results about "Turning radius" patented technology

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.

This application provides a method for determining the configuration of shuttle car train formations in TBM tunnels with small turning radii, applied in the field of data processing technology. The method includes: calculating the amount of slag discharged per TBM cycle by using the acquired rock debris loosening coefficient, tunnel excavation radius, and TBM per excavation cycle length; calculating the number of shuttle cars in the train formation based on the slag discharge per TBM cycle and the slag capacity of the shuttle cars; calculating the total weight of the shuttle cars fully loaded by using the rock debris density, water content coefficient, tunnel excavation radius, and TBM per excavation cycle length; calculating the total traction force required for the shuttle car train formation by using the acquired gradient resistance coefficient, resistance coefficient of the shuttle car train formation, and safety factor of the shuttle car train formation; and calculating the adhesive weight configuration information of the shuttle car train formation based on the total traction force and adhesion coefficient. This improves the accuracy of shuttle car train formation configuration.

The application discloses a control method, an electronic device, a vehicle, a storage medium and a program product, and the control method is applied to a vehicle and comprises the following steps: obtaining a set turning radius input by a target object; and adjusting the rotating speed of at least one target wheel of the vehicle, so that the turning radius of the vehicle reaches the set turning radius. By obtaining the set turning radius input by the target object, and then adjusting the rotating speed of the at least one target wheel of the vehicle, so that the turning radius of the vehicle reaches the set turning radius, the effect that the vehicle can be controlled to flexibly turn at an arbitrary turning radius is achieved without adding hardware, the effect that the rotation center of the vehicle can be at a wheel, a certain point in the vehicle or a certain point outside the vehicle is realized, the control is simple and easy to realize, and problems, such as unnecessary collision or occupying too many lanes due to too large turning radius, can be avoided, the steering precision is improved, and the flexibility and maneuverability of the vehicle are improved.

The application provides a parallel rendezvous-based waiting state refueling route calculation method, and belongs to the technical field of route planning, which comprises the following steps: obtaining input refueling route key parameters, including a rendezvous starting point, a rendezvous control point, a refueling speed, a refueling height, a turning roll angle and the like; then, calculating refueling entry headings, turning radii and refueling offsets, turning starting points, turning ending points and the like key points according to the obtained input refueling route key parameters, so as to generate a complete waiting state refueling route. The application can calculate the refueling route according to the position of a receiver aircraft at any time, reduces the waiting time of the receiver aircraft, and improves the refueling efficiency.

This invention relates to the field of digital twin technology, specifically to a two-dimensional spatial multi-device collaborative coverage simulation method based on digital twins. The method includes acquiring the elevation grid, slope vector, regional soil friction coefficient, and structural parameters of the agricultural machinery such as wheelbase and center of gravity of the area to be operated; calculating the dynamic vertical load and lateral tilting stability moment of each wheel using kinematic and equilibrium models; calculating the lateral slip yaw distance and longitudinal drive slip ratio of the agricultural machinery based on the Coulomb criterion and friction force limits; dynamically correcting the theoretical turning radius and nominal width using slip data to generate a high-precision path node sequence; finally, converting the nodes into four-dimensional spatiotemporal bounding boxes for overlap detection; adjusting the timestamps according to the acceleration response limits of the agricultural machinery entities; and outputting the multi-machine collaborative operation trajectory flow. This invention achieves high-fidelity collaborative simulation of multiple machines through deep coupling of physical fields.

This invention discloses a vehicle control method, device, electronic device, storage medium, and program product. The method includes: detecting first information about a first vehicle; responding to the first information indicating that a first travel segment is a downhill section, determining a first speed based on second information, the second information indicating the weight of the first vehicle and the gradient of the first travel segment; responding to the first information indicating that the first travel segment is a turning section, determining a second speed based on third information, the third information indicating the road surface friction coefficient and turning radius of the first vehicle when traveling on the first travel segment, the second speed indicating the upper limit of the permissible speed for the first vehicle to make a smooth turn on the first travel segment; and controlling the first vehicle to travel on the first travel segment based on the first speed or the second speed. This application solves the problem of safe driving of engineering transport vehicles throughout the entire transportation journey.

This invention relates to a method for crossing sharp bends on bridges using a double-turntable bridge-type transport vehicle. The method includes the following steps: Step S1, site survey; Step S2, calculation of turning radius and steel trestle bearing capacity; Step S3, obstacle removal and site leveling; Step S4, steel trestle installation; Step S5, adjustment of the transport vehicle's attitude before crossing the bridge; Step S6, turning across the bridge; Step S7, restoration of the transport vehicle after crossing the bridge; Step S8, dismantling of the steel trestle; Step S9, site restoration. This invention provides a method for crossing sharp bends on bridges using a double-turntable bridge-type transport vehicle, researches and develops such a method, and constructs a core technology system for "bridge-on-bridge" steel trestle composite bearing, dynamic steering control of the double turntables, and full-process safety assurance. It provides technical reference and engineering paradigm for the transportation of large equipment in complex terrain in water conservancy and transportation fields.

The utility model provides a kind of loop structure for loop acceleration loading test, including loop body and the double-ring track being located in the both sides of loop body;The surface of loop body forms test pavement, and double-ring track is used to connect loading device and makes loading device load test pavement;Loop body includes two straight sections, two curved sections and four bend straight transition sections in turn butted into ring, one end of each bend straight transition section is respectively connected with the end of one of straight sections, and the other end is respectively connected with the end of one of curved sections;Curved section has fixed lateral slope, and bend straight transition section has gradual lateral slope, and gradual lateral slope gradually increases from the end of bend straight transition section and straight section to the other end.The loop structure for loop acceleration loading test provided by the utility model can reduce the turning radius under the premise of meeting the operating speed requirement of loading device, and improve the operating stability of loading device.

The application provides a rear axle steering continuous pipe operation roller semi-trailer. The semi-trailer comprises a frame, a roller arranged on the frame, a rear axle assembly and a rear axle steering mechanism. The rear axle steering mechanism comprises an upper support seat, a rotary disc bearing, a lower support seat and a steering driving assembly. The steering driving assembly and the upper support seat are arranged on the frame, the rotary disc bearing is connected with the upper support seat and the lower support seat respectively, and the lower support seat is fixedly connected with the rear axle assembly. The steering driving assembly is connected with the lower support seat to drive the lower support seat to rotate relative to the upper support seat and drive the rear axle assembly to rotate. The rear axle assembly is steered by adopting the steering driving mechanism to drive the lower support seat. The relative rotation angle between the frame and the wheel is large, the turning radius of the semi-trailer is reduced, the reliability of the steering driving is improved, the safety of the whole vehicle is improved, and the driving strength of the vehicle is reduced.

This invention relates to the field of robotic arms, specifically to a telescopic rotary device based on a rigid chain. The device includes a first rigid chain driver, a second rigid chain driver, a third rigid chain driver, and a rotary driver. The first rigid chain driver is configured to extend downwards in a vertical direction. The rotary driver is connected to the extended end of the first rigid chain driver and has a degree of freedom to rotate around a horizontal and / or vertical axis. The second and third rigid chain drivers are positioned opposite each other on either side of the rotary driver. This invention reduces the overall height and turning radius of the telescopic rotary device, enabling it to be mounted on small vehicles and moved stably. It also has a large telescopic ratio in both the vertical and horizontal directions, expanding the working depth and breadth of small robotic arms, thereby enabling construction operations in environments with narrow, low entrances and wide, deep interiors.

The application discloses a loader-oriented double-axle variable-position real-time monitoring method and device, and comprises the following steps: initializing loader structure parameters and control parameters; acquiring a vehicle measured state; determining a preview point according to a reference path and a preview distance; calculating a preview angle in a rear vehicle frame coordinate system; implicitly solving a target turning radius and mapping to obtain a hinged angle instruction; and outputting a control instruction after a realizable domain constraint processing. The application is based on a loader double-axle non-skid geometric relation, a unified mapping of the target turning radius and the hinged angle is established through implicit solution, stable and continuous instruction output can be realized under the dynamic double-axle variable-position condition, and consistency in the operation process is improved.

To provide a control system for work vehicles that can improve the efficiency of movement to the work start point while suppressing the computational load. [Solution] The system comprises a portable terminal device for inputting information about the work equipment to be attached, and a control unit that generates a work route including the work start point in the field and controls the vehicle body to perform work while autonomously driving along the generated work route. The control unit generates a starting circle which is a circle with a turning radius that is tangent to the azimuth vector acquired by the azimuth acquisition means and the self-position acquired by the positioning device, and an entry circle which is a circle with a turning radius that is tangent to the work route vector and the work start point. Based on the information about the work equipment, the control unit generates a plurality of candidate movement routes including the portion along the starting circle and the entry circle, and sets the route that is the shortest between the self-position and the work start point from the plurality of generated routes as the autonomous driving movement route.

This utility model relates to the field of column technology, specifically to a single-pile corner integrated column. Its features include a hollow column body with multiple sliding turning devices spaced apart along its height within its inner cavity. Multiple through holes are provided on two adjacent sides of the hollow column body. Each sliding turning device includes a support assembly and multiple turning guides rotatably mounted on the support assembly. During cable pulling, the turning guides can adaptably rotate, increasing the cable's turning radius. This helps reduce resistance during cable pulling, facilitating single-pass cable tightening without breaking the cable. The single-pile hollow column body is sufficient to achieve cable turning.

The application discloses a wheel-track combined semi-trailer tractor and a traction method thereof, and relates to the field of tractors, and can effectively improve the load capacity and driving performance of the tractor, reduce the turning radius, and realize the transverse moving function to meet the transfer requirements of large-scale equipment in a mine area.

The present application relates to a posture control device. A posture control device capable of acquiring an acceleration in a front-rear direction and an acceleration in a left-right direction of a moving body without using an acceleration sensor, and performing posture control based on the acquired accelerations is provided. The posture control device of the embodiment, as one example, is provided with: an arithmetic unit that calculates an acceleration in the front-rear direction using a weight of the moving body and a braking driving force, and calculates an acceleration in the left-right direction using a vehicle speed and a turning radius, and causes the acceleration in the front-rear direction to calculate a base target angle in the front-rear direction, and causes the acceleration in the left-right direction to calculate a base target angle in the left-right direction.

This utility model discloses a bidirectional track-and-ground walking chassis, belonging to the field of chassis technology. It includes a chassis body; a rotating base installed at the center of the chassis body; and at least two drive units, each including a bracket, a driver, a first drive wheel, and a second drive wheel. The bracket is connected to the rotating base via a telescopic push rod, and the driver is mounted on the bracket. The first and second drive wheels are coaxially arranged and driven by the driver, with the diameter of the first drive wheel being smaller than that of the second drive wheel. This utility model enables bidirectional movement with high stability. It reduces the turning radius through lateral movement, simplifies the turning and track-changing path of the bidirectional track-and-ground walking chassis in actual use, improves the chassis's applicability in confined areas, and makes it more suitable for use in ground environments.

Embodiments herein disclose methods and systems for optimizing the productivity and improving the stability of electric vehicles by sensing field size and soil condition and automatically assisting the vehicle to turn by rotating inner wheels faster as compared to outer wheels of the vehicle and rotating front wheels of the vehicle faster as compared to rear wheels of the vehicle, and selectively braking respective wheel during headland operations. Embodiments herein enable operators to attain tight headland turns with lower head land space. Embodiments herein can detect a plurality of parameters such as, field conditions, soil condition, implements(s) connected to the vehicle, and so on, and control the turning radius of the vehicle as per requirement in at least one mode.

The application provides a kind of low airspace collaborative management method and system based on digital twinning, comprising: based on the real-time state data of aircraft obtained, analyzing aircraft maneuverability, flight envelope characteristic parameters, characteristic parameters include maximum speed, maximum acceleration, minimum turning radius, utilize kinematics and dynamics model, depict different aircraft movement law;Combined with real-time flight data of aircraft, through digital twinning technology, real-time synchronization aircraft motion trajectory and attitude change in virtual environment, accurately reproduce aircraft dynamic behavior, provide high-fidelity digital model for flight conflict detection, flight path prediction;For aircraft motion characteristic difference, construct multi-level, multi-granularity digital twinning model, digital twinning model includes airspace structure model at macro level, aircraft group behavior model at mesoscopic level and single aircraft dynamic model at micro level.

The application provides a method and device for generating a farm machine guide line, the method comprising: determining a reference safety distance of the farm machine according to a minimum turning radius of the farm machine and a target offset distance; the reference safety distance representing a distance between a projected position of a current position of the farm machine on a target work path and a target upper line position of the target work path; constantly updating the target upper line position of the target work path and determining an upper line reference time of the farm machine according to the reference safety distance of the farm machine; the upper line reference time being determined according to an initial speed, an initial position of the farm machine and the target upper line position of the target work path; generating a target guide line of the farm machine according to the upper line reference time of the farm machine and a guide line trajectory generation equation constructed in advance; and the acceleration, impact and curvature value of the target guide line during the travel of the farm machine all satisfying constraint conditions. The application can ensure that the farm machine smoothly, accurately and efficiently cuts into the work path, so as to improve the work efficiency and work quality of the farm machine.

The utility model belongs to drive motor technical field, especially a kind of wheeled drive motor for walking machine steering wheel, including C-type support, the inside of C-type support is rotatably installed with rotary pin shaft, the outside of rotary pin shaft is fixedly installed with rotary joint assembly, the outside of rotary joint assembly is fixedly installed with main casing, the inside of rotary joint assembly is provided with output flange shaft, rotor assembly is provided on output flange shaft, this wheeled drive hydraulic motor is compact in size and light in weight, more easily integrated into walking machine, especially the frame system of agricultural harvesting machine;Hydraulic oil port opens in steering pivot top end, it will not swing with the steering of wheel, avoids rubber tube winding distortion, improves reliability;Adopt special steering pivot structure to replace traditional bogie, significantly save steering wheel inside space;On walking machine, it has the large steering angle that cannot be realized by conventional steering drive axle, can effectively reduce the turning radius of vehicle, provides new design thought for walking machine, especially agricultural harvesting machine manufacturer.

The application discloses a vehicle control method, a controller and a vehicle, and relates to the technical field of vehicles. The vehicle control method comprises the following steps: in response to an obstacle avoidance trigger, performing obstacle avoidance trajectory planning on the vehicle; and performing reverse steering control on the front wheels and the rear wheels of the vehicle based on the planned obstacle avoidance trajectory. Thus, through independent front and rear wheel steering collaborative control, the vehicle can obtain a smaller turning radius and a faster yaw response than traditional front wheel steering in the initial stage of obstacle avoidance, the problem of yaw response lag caused by the front wheel steering architecture in the prior art is overcome, and the steering timeliness and obstacle avoidance safety in an emergency working condition are improved.

The present disclosure relates to a trailing segment rear support device and a belt conveyor and a TBM main machine with the same. The trailing segment rear support device comprises a support frame for fixedly mounting the trailing segment rear support device to a rear shield of a main propulsion system of the TBM main machine; and an arc-shaped support plate fixedly arranged on the support frame, the arc-shaped support plate being adapted to rest against a trailing segment rear of the belt conveyor. The present disclosure designs a combined support structure capable of following the main machine, improves the self-adaptability and multi-degree-of-freedom movement of the TBM main machine belt conveyor, and meets the needs of small turning radius of the TBM, especially the small-diameter TBM main machine.

This invention relates to the field of micro-tiller robots and discloses a micro-tiller robot. The invention includes a front frame, with a rear frame located adjacent to the front frame. Both the front and rear frames are equipped with boom and arm assemblies, each comprising a boom, forearm, connecting rod, and forearm connecting plate. Each of the four booms supports independent lifting and lowering control, allowing for individual adjustment of height and posture according to terrain undulations and operational needs, flexibly adapting to different working conditions. The rear frame has an auxiliary turning and swinging function, resulting in smoother and more flexible steering, effectively reducing the turning radius and improving the overall machine's adaptability to field turning and movement. When moving between fields on a separate road surface, the boom, forearm, and connecting rod simultaneously retract and lift upwards, reducing the machine's footprint and the risk of scraping, while improving mobility and movement efficiency.

The utility model discloses a self -propelled south candle harvesting equipment, including travelling device, harvesting device, travelling device is the door frame type chassis structure of independent steering and height adjustable, adopts eight wheel drive system, and two wheels in each wheel part can pitch forward and backward, and the terrain is self -adapted, and has shock absorber, so that equipment avoids the wheel suspension or skidding due to ground inclination, and each wheel part can independently adjust height, and the more complex terrain such as cross -slope harvesting is adapted, and simultaneously can guarantee the south candle of different height and carry out harvesting operation, harvesting device is installed in the front end and middle part area of travelling device, and harvesting device has the collaborative design between the sweep wheel, air blower and reciprocating cutting mechanism, can cut crops and will collect and handle after cutting crops, and the length of shearing and harvesting tender shoot can be adjusted, the device realizes height adjustable and independent steering, reduces the turning radius in field, improves its climbing performance and harvesting range, improves operation efficiency and quality.

The application discloses a distributed electric drive multi-wheel unmanned vehicle chassis system and a multi-mode turning method thereof, and is used for solving the problems of large turning radius, limited turning mode, lack of safety interlocking and fault degradation in a limited space scene. The chassis system comprises a chassis body, a suspension wheel set and a control system. Each suspension wheel set is provided with a wheel edge electric drive module, the wheel edge electric drive module comprises a motor and a speed reducer, and the output end of the speed reducer is in transmission connection with a wheel shaft of a wheel. The control system comprises a control unit, a drive controller and an interlocking execution unit. The control unit outputs a control instruction to the drive controller, so that the left and right wheel edge electric drive modules output opposite direction torque instructions and / or differential torque instructions, so as to execute a spot turning mode and / or a radius turning mode. When the interlocking condition is not met, the interlocking execution unit is used for limiting the entry of the spot turning mode, and mode degradation switching is performed when the electric drive module fails, so as to improve the maneuverability and operation safety in the limited space.

An electric vehicle module assembly including a steering actuator sub-assembly connected to a beam axle sub-assembly. The steering actuator sub-assembly provides multiple functions, including the inherent function of the steering actuator to improve the turning radius of the electric vehicle, as well as positioning the center of gravity of the electric vehicle module assembly in a more desirable position such that NVH issues are reduced for the electric vehicle.

This invention relates to the field of steering control in agricultural machinery and automobiles, specifically to an auxiliary mechanism for automatically reducing the steering radius. The mechanism includes a steering detection unit, a braking actuator, a four-wheel drive control unit, and a power operation unit. The steering detection unit is mounted on the front axle to detect the steering limit position. The braking actuator is mounted on the rear axle to perform braking actions. The four-wheel drive control unit controls the engagement and disengagement of the four-wheel drive system. The power operation unit provides power and steering. The steering detection unit and the braking actuator are connected via wiring harnesses. The braking actuator is connected to the four-wheel drive control system wiring harness, and the power operation unit is connected to the four-wheel drive control system wiring harness. This invention solves the drawbacks of current methods that rely on front-wheel steering or differential steering.