132 results about "Tire rotation" patented technology

The invention belongs to the field of intelligent driving vehicle dynamics control, and discloses a three-axis vehicle fault-tolerant trajectory tracking method based on infinite time domain model predictive control, and the method comprises the steps: obtaining the current state feedback of a vehicle chassis in real time; acquiring the coordinate position of the current vehicle in real time; the method comprises the following steps: reading the speed and acceleration of a vehicle in an east-north-sky coordinate system through vehicle-mounted CAN (Controller Area Network) communication by utilizing differential positioning service fusing IMU (Inertial Measurement Unit) and GPS (Global Positioning System) of inertial navigation Modeling a vehicle dynamics model; establishing a tracking error model; establishing an optimization solution problem of steady-state reference; the generation of the reference quantity is described as an optimization solution problem; designing a trajectory tracking controller; the steering actuator controls output; the control quantity is obtained through the MPC optimization problem constructed in the sixth step, and the control quantity is the tire turning angle and is sent to a vehicle chassis through a CAN signal. According to the method, the potential relation can be mined, so that effective mapping to fault data is realized.

The utility model discloses an angle module for traction and steering of a wheeled robot, which relates to the technical field of robot running parts, and comprises a vehicle body bracket and tires at four corner ends, a mounting shell is arranged above the tires, an angle module is arranged on the side of the tires, and the angle module comprises a traction module and a steering module. A traction motor in the traction module is connected with a traction rotating shaft through a speed reducer, a driving shaft and other parts to drive tires to rotate, and the axis of the traction driving shaft is coplanar with tire landing points; the steering module achieves steering through a steering motor and other components. The vehicle body support comprises a central framework, a bridge frame and modular bridges, one modular bridge is connected with the weeding module, and the other modular bridge is provided with a self-adaptive suspension and a suspension optical axis. The angle module solves the problems of power transmission, steering performance, structural stability and the like of an existing angle module, and has the advantages of being efficient, flexible, stable, universal, good in environmental adaptability and the like.

The toy car comprises a car frame, a car head and front tires, the front tires are rotationally connected with the car frame through pin shafts, the car head comprises an upper jaw part, a lower jaw part, a first transmission assembly, a second transmission assembly and a huff-puff assembly, the upper jaw part and the lower jaw part are rotationally connected with the car frame through pin shafts respectively, and the first transmission assembly and the second transmission assembly are rotationally connected with the car frame through pin shafts respectively. The first transmission assembly is used for controlling the lower jaw part to be opened and closed through rotation of the front tires, the second transmission assembly is used for controlling the upper jaw part to be opened and closed through rotation of the front tires, and the huff and puff assembly is located between the upper jaw part and the lower jaw part and used for huff and puff of the trolley. Through the synchronous transmission effect of the first gear, the second gear, the third gear, the transmission block and the transmission plate, the toy car can continuously and synchronously carry out handling of the trolley, and compared with a transmission handling toy, the functionality is higher, and the entertainment is higher.

The invention discloses a tire rotating speed control method, system and equipment of an electric boom and a medium, and belongs to the technical field of engineering machinery. The electric arm vehicle comprises a steering structure, a plurality of tires and a plurality of walking motors, the steering structure comprises a left steering seat, a right steering seat, a steering axle and a steering pull rod, the tires correspond to the walking motors one to one, and the tire rotating speed control method of the electric arm vehicle comprises the steps that the current steering angle of the electric arm vehicle is determined; generating motor rotating speed control information according to the relation between the current steering angle and the motor rotating speed; and controlling the walking motor to drive the tire to rotate according to the motor rotating speed control information. The tire rotating speed of the electric boom can be reasonably controlled, and the safety risk is reduced.

To provide a tire simulation method and a tire simulation device which can shorten a computation time of a crack progress.SOLUTION: The tire simulation method includes tire model acquisition step ST01 which acquires a tire model for analyzing a rolling state of a tire, tire model deformation calculation step ST02 which calculates deformation of the tire model equivalent to one lap of tire rolling when the tire is grounded, tire part model acquisition step ST03 which acquires a tire part model for analyzing a part of the tire model, tire part model deformation calculation step ST04 which calculates deformation of the tire part model on the basis of the deformation of the tire model, crack progress model generation step ST07 which generates a crack progress model which defines a base point of the crack on the tire part model and crack progress analysis step ST08 which analyzes crack progress by calculating the deformation of the crack progress model on the basis of the deformation of the tire part model.SELECTED DRAWING: Figure 2

The application discloses a kind of subway tunnel inspection robot integrated positioning method and system, servo motor encoder is installed on inspection robot, inertial sensor, camera, RFID label, RFID receiver is installed on both sides of each platform of subway tunnel, multiple adjacent setting distance line marks are evenly provided on the line between every two platforms of subway tunnel, and the method is as follows: real-time acquisition tire rotation number of inspection robot, robot motion parameter, the tunnel image of shooting and the RFID platform signal fed back when inspection robot passes through platform;Further, line mark information and the pose information of robot are calculated and acquired;According to RFID platform signal, tire rotation number, line mark information and pose information, the integrated positioning of inspection robot is carried out, and position and pose information are output.The present application realizes efficient, accurate, implementable centimeter-level error positioning to inspection robot by establishing fusion identification rule and integrated positioning method.

The invention provides a tire appearance defect detection system and method, and relates to the technical field of industrial automatic detection. The method comprises the following steps: automatically guiding and centralizing a horizontal incoming tire into a vertical posture, centering and then accelerating conveying; guiding the tire to enable the tire to be accurately positioned at a detection station; the tire is inserted from the inner sides of an upper tire opening and a lower tire opening of the tire, clamped, lifted away, suspended and fixed, then the tire side is radially expanded to form an annular detection channel, and the tire is driven to rotate at a constant speed; image acquisition of the inner cavity and the outer surface is synchronously carried out in the tire rotation period; and releasing and pushing out the tire after the detection is completed. The system is formed by sequentially connecting a tire guide-in centering device, a transition mechanism, a detection station device, a tire expander, a tire inner / outer detection device and a push-out mechanism. The full-automatic tire appearance detection device realizes full automation of tire appearance detection from feeding, positioning, expansion, rotation, image acquisition to blanking, improves the production takt and the internal and external detection precision through an internal nondestructive clamping expansion and synchronous rotation detection technology, and realizes automatic tire detection.

The present invention provides a tire dimension measuring device and a tire dimension measuring system that can measure the tread radius of a tire with high precision. [Solution] A tire dimension measuring device 1. It includes a tire holder 2 for holding a tire T in a vertical position with the tire rotation axis Tc horizontal, and a non-contact displacement meter 3 for measuring at least the tread radius of the tire T held by the tire holder 2. The non-contact displacement meter 3 further includes a mover for moving the held tire in the tire radial direction and / or tire axial direction, and measures the tire outer diameter and / or tire total width.

A method is provided of applying a sound-absorbing material to an inner cavity of a pneumatic tire using a strip of sound-absorbing material provided on one side with an adhesive layer covered with a protective lining. A grip member integral to a recovery drum grasps an initial part of the protective lining whilst the recovery drum is at a first side of an applicator roller. The recovery drum is moved from the first side to a second side of the applicator roller, opposite the first side, such as to partially wind the strip of material around the applicator roller. The applicator roller presses the strip of material against the inner cavity of the tire whilst the tire is rotated, and the recovery drum is rotated synchronously with the tire to wind the protective lining around the recovery drum, step-by-step, as the protective lining is separated from the strip of material.

Provided is a tire having improved durability during high-speed travel. A tire having a pair of bead sections each having a bead filler extending from a bead core to the outside in the tire radial direction, and a bead support layer disposed on the outside of the bead filler in the tire rotation axis direction, the bead support layer being composed of a rubber composition (B), the tire having an outer diameter (mm) of Dt and an outer diameter (mm) of Dt, the outer diameter (mm) of Dt being smaller than the outer diameter (mm) of Dt being smaller than the outer diameter (mm) of Dt, and the outer diameter (mm) of Dt being smaller than the outer diameter (mm) of Dt being smaller than the outer diameter (mm) of Dt. When the loss tangent of the rubber composition (B) at 70 DEG C is 70 DEG C tan [delta] (B), Dt and 70 DEG C tan [delta] (B) satisfy the following formulae: (1) 70 DEG C tan [delta] (B) * Dt < = 110.0; (2) Dt < = 600.

The invention discloses an automobile tire air leakage fault practical training platform, and relates to the technical field of automobile tire teaching, the automobile tire air leakage fault practical training platform comprises a replacement assembly on which a plurality of different types of tires are placed, each tire comprises a hub, the hub is also provided with an air inlet valve and an air outlet, and the air leakage state of the tire is simulated by controlling the closing of the air outlet. The rotating assembly locks the tire and drives the tire to rotate, presses the tire in the rotating process, simulates the working state of the tire under load, and comprises a simulation assembly for simulating the running road condition of the tire, a plurality of groups of different belts are arranged on the simulation assembly, and the running road condition of the tire is simulated through contact between the belts and the tire; personnel can directly observe the air leakage phenomenon of the tire in different states, and the impression of the personnel on the air leakage fault of the tire is deepened.

The utility model provides extruding device of tire processing belongs to mechanical engineering technical field, including bearing mechanism, including bottom plate, fixed plate of fixed installation in bottom plate outer surface, material box of setting in bottom plate outer surface, and the material box intercommunication's discharge pipe, and the spray head of discharge pipe intercommunication, the fixed mechanism includes the fixed frame of fixed installation in bottom plate outer surface, sets up in fixed frame one side and is used for the orientation subassembly of tire positioning, and the drive subassembly of tire rotation. The utility model discloses through the mutual cooperation of orientation subassembly and drive subassembly, has realized the automatic positioning of different specifications tire, stable clamping and even rubberizing, the first motor cooperation thread bar and internal thread block in orientation subassembly, can automatically adjust the roller spacing, can adapt to a variety of tire size, and drive subassembly makes the rotation of limiting block through second motor, makes tire steady rotation, ensures the evenness of rubberizing and operation stability, has improved tire extruding efficiency and product quality.

The application discloses a multi-module fusion vehicle state estimation model and a control method thereof, relates to the technical field of vehicle engineering and intelligent vehicle control, and comprises a tire force estimation module, a vehicle pose estimation module, an adhesion coefficient calculation module, a slip rate calculation module, a road surface friction coefficient identification module and a yaw angular acceleration calculation module; the tire force estimation module acquires four-wheel speeds, four-wheel driving torques, four-wheel braking torques, a vehicle speed, longitudinal acceleration, lateral acceleration, vertical acceleration, yaw angular velocity, pitch angular velocity and roll angular velocity, performs tire rotation dynamics calculation and axle load transfer calculation, and obtains longitudinal forces and vertical forces of each wheel. The application adopts a layered module architecture and multi-parameter fusion calculation, realizes accurate estimation of vehicle states, optimizes calculation logic and constraint mechanisms in different scenes through a working condition self-adaptive strategy, and improves overall estimation accuracy, system stability and engineering adaptation capability.

The present disclosure generally relates to an apparatus for forming a foam layer structure onto an inner wall of a vehicle tire's body, comprising: a foaming machine (200) having a nozzle (210 or 210') for selectively discharging a foamable composite; a tire rotating device (100) having a base (110), a support (120) arranged relative to the base (110) to be selectively rotatable about a first rotational axis between the base (110) and the support (120), a bracket (130) arranged on the support (120) to be selectively rotatable about a second rotational axis between the support (120) and the bracket (130), and at least three claws (140) installed on the bracket (130) for releasably clamping a body of a vehicle tire (600) on the bracket (130) such that the central axis of the body of the vehicle tire (600) clamped by the claws (140) is coaxial with the second rotational axis, at least one of the tire rotating device (100) and the foaming machine (200) is movable to enable the nozzle (210 or 210') to be at least partially located in a hollow space surrounded by the body of the vehicle tire (600), wherein during and / or after application of the foamable composite on an inner wall of the body of the vehicle tire (600), the bracket (130) is driven to selectively rotate about the second rotational axis and / or the base (110) can be driven to selectively rotate about the first rotational axis, the first rotational axis is not coplanar with and at a right angle relative to the second rotational axis, and the foam layer structure is formed after the foamable composite is self-foamed and cured. The present disclosure also relates to a vehicle tire manufacturing system and a vehicle tire.

The utility model relates to the field of tire detection, in particular to detection equipment for an engineering tire nylon reinforcing structure, which comprises a rolling type detection auxiliary assembly and a portal frame erected above the rolling type detection auxiliary assembly, and a tire fixing mechanism with an angle adjusting function is arranged on the inner side of the portal frame. The telescopic rod assembly is connected to the top of the portal frame and drives the tire fixing mechanism to move up and down, and the telescopic rod assembly drives the tire fixing mechanism to move downwards and is suitable for driving the detected tire to make rolling contact with the rolling type detection auxiliary assembly. The driving motor I drives the gear to drive the slewing bearing to rotate, so that the L-shaped connecting seat drives the tire to rotate so as to change the contact angle of the tire, and in combination with reverse rotation of the detection roller, the differential effect and lateral sliding friction during turning of the vehicle are accurately reproduced, so that the stress conditions of the tire in different directions during actual driving are simulated, and the test accuracy is improved. And the detection precision is improved.

The application discloses an automatic speed measurement method based on a TPMS with a magnetometer and a tire pressure detection system. Single-axis magnetic field intensity located on a tire surface is sampled according to a preset sampling interval. A plurality of continuous peak points are obtained according to a sampling value and based on the same sampling interval. A tire rotation period is obtained based on the number of sampling points between the plurality of continuous peak points and the sampling interval, so as to calculate the speed of a current vehicle. The automatic speed measurement method can detect a motion state at different speeds, effectively avoids the problems of an accelerometer range and precision, has a lower cost than the accelerometer, and has a higher stability than the accelerometer.

The utility model provides a portable support frame for power transformation engineering construction, which relates to the technical field of power transformation engineering construction, and comprises known telegraph poles for line erection, two arc-shaped plates and a hanger plate, the two arc-shaped plates are respectively arranged on two adjacent telegraph poles, and the hanger plate is arranged on the two adjacent telegraph poles. The lifting plate is arranged between the two arc-shaped plates and used for lifting a cable, a clamping block is detachably arranged on one side of each arc-shaped plate, the clamping blocks coincide with the center axes of the arc-shaped plates, and a plurality of electric wheels in rolling connection with the surface of the telegraph pole are installed on the inner walls of the clamping blocks and the inner walls of the arc-shaped plates. Electric wheel tires in the arc-shaped plate and the clamping block rotate and roll along the surface of the telegraph pole, the arc-shaped plate and the clamping block are driven to climb to a certain height along the surface of the telegraph pole, an electric capstan at the bottom of an insertion block on the arc-shaped plate can be used for pulling and lifting a lifting plate, and cable supporting at any falling height is achieved through the lifting plate.

This provides a tire characteristic measurement method that can quickly measure the axial force when a tire crosses an obstacle at various speeds. [Solution] The tire characteristics measurement method includes: step S1 of mounting a tire T on a tire rotation shaft 4 of a tire testing machine 1 equipped with a drum 2 having a running surface S on which a first projection 3 is provided; acquisition step S2 of rotating the drum 2 continuously for multiple rotations to run the tire T on the running surface S and acquiring time-series data of the force acting on the tire rotation shaft 4 when the tire T crosses over the first projection 3 in each of the multiple rotations, wherein the rotation speed of the drum 2 when the tire T crosses over the first projection 3 is different in each rotation; and calculation step S3 of calculating force tire running speed series data based on the force time-series data.

The utility model discloses a flight power supply device for emergency rescue. The flight power supply device comprises a flight mechanism, a traveling mechanism and a power generation module, the flight mechanism comprises a propeller and a first power source for controlling the propeller to rotate, and the propeller is mounted at the top of the power generation module; the traveling mechanism comprises all-terrain tires and a second power source controlling the all-terrain tires to rotate, and the all-terrain tires are arranged at the bottom of the power generation module. According to the technical scheme, the flying mechanism is used for driving the traveling mechanism to fly, and the traveling mechanism can move on the ground, so that the power generation module can cross complex terrains to meet the moving requirement.

The invention provides a vehicle tire rotation angle estimation method. The method comprises the steps that the yaw angle rate of a vehicle is calculated according to combined navigation course information of the vehicle; calculating an absolute rotation angle of a vehicle tire based on a yaw angle rate of the vehicle through a vehicle kinematic model; performing gap processing on the initial encoder data of the vehicle to obtain target encoder data of the vehicle, calculating an initial encoder rate of the vehicle based on the target encoder data of the vehicle, and performing delay processing on the initial encoder rate of the vehicle to obtain a target encoder rate of the vehicle; estimating a second vehicle tire rotation angle through a Kalman filtering algorithm based on the absolute rotation angle of the vehicle tire and the target encoder rate of the vehicle; and according to the running speed of the vehicle and the actually measured turning angle of the vehicle, the first vehicle tire turning angle or the second vehicle tire turning angle is selected and output as the target vehicle tire turning angle. The accurate and high-stability vehicle tire rotation angle is obtained by combining the tire rotation angle calculated based on the course angular rate and the tire rotation angle calculated based on the encoder.

A motorized wheel assembly is provided herein. The motorized wheel assembly comprises an in-hub motor comprising a stator and a rotor. A shaft is connected to the stator of the in-hub motor. The motorized wheel assembly further comprises a hub, attached to and configured to rotate with the rotor. The hub is disposed about the shaft and the in-hub brake system. The wheel assembly further includes a tire disposed about the hub. The motorized wheel assembly further comprise an in-hub brake system positioned about the shaft. The in-hub brake system comprises a biasing system, an actuator plate, a brake plate, and a brake pad system. The biasing system is configured to bias the actuator plate to the engaged position to cause the brake pad system to apply a force to the brake plate to prevent rotation of the hub and the tire.

The present application relates to the technical field of vehicles, and discloses a motor torque zero-crossing control method and device, a vehicle, electronic equipment and a medium. The method controls the motor to sequentially output a first direction torque and a second direction torque when the vehicle is in a continuous high-speed sliding state, so that the gear moves on different sides of the teeth. The motor rotor angular velocity and the vehicle tire rotation angular velocity in this process are collected, the transmission system gap is determined, and the target torque gradient correction value is matched to determine the current torque zero-crossing gradient of the vehicle, thereby performing torque zero-crossing control on the motor of the vehicle. The current torque zero-crossing gradient is corrected during vehicle driving, and the determination and correction of the current torque zero-crossing gradient are personalized for each vehicle, thereby improving the adaptability of the current torque zero-crossing gradient, the smoothness of the power system output torque, and the user experience.

The invention relates to the technical field of aircraft tire testing, and discloses an aircraft tire intelligent detection device which comprises a vehicle body, universal wheels are installed on the lower surface of the vehicle body, a sliding rail assembly is fixedly connected to the upper surface of the vehicle body, and a first supporting plate is slidably connected to the upper surface of the sliding rail assembly. A rotating assembly is fixedly connected to the upper surface of the first supporting plate, a sliding plate is fixedly connected to the exterior of the first supporting plate, a second supporting plate is slidably connected to the upper surface of the vehicle body, the exterior of the sliding plate is slidably connected to the interior of the second supporting plate, and a connecting plate is fixedly connected to the interior of the vehicle body. The upper surface of the connecting plate is fixedly connected with a jack. The first supporting plate drives the rotating assembly to slide along a straight line, the contact position of the rotating assembly and the tire is flexibly adjusted according to the size of the tire, a limiting column of the limiting assembly is clamped into a limiting groove under the action of a first spring, position deviation caused by tire rotating counter-acting force or vibration in the detection process is avoided, and the detection stability is ensured.

The application provides a method and system for predicting tire uniformity by scanning and pressure distribution of a finished tire, comprising: obtaining tire point cloud data attributes, analyzing the point cloud data attributes, and removing noise points to obtain an original 2D point cloud graph, establishing a theoretical model reconstruction and an actual model reconstruction system based on the point cloud data attributes and the original 2D point cloud graph, determining the shape and volume of concave points or convex points of the tire deviating from the basic tire contour, and establishing a mass and size distribution graph, applying stress to the tire tread, and obtaining a stress distribution model of the tire tread, and establishing a tire uniformity two-dimensional model based on the mass and size distribution graph and the stress distribution graph of the tire tread to test the uniformity of the tire. The application achieves the purpose of predicting the force generated by the tire rotation at different speeds and the change of the force without traditional uniformity testing through simulation and point cloud processing of the finished tire.

To provide a system and the like for measuring a force acting on the tread of a tire capable of high-definition measurement of the force without increasing the number of force detection units for measuring the force.SOLUTION: Provided is a measurement system 1 for measuring a force acting on the tread of a tread part 2 of a tire T. The measurement system 1 includes a force detection unit 4, a tire rotation position detection unit 10, a data processing unit 13 that processes data from the force detection unit 4 and the tire rotation position detection unit 10. A detection surface of the force detection unit 4 has a first length in a drum circumferential direction, and the tire rotation position detection unit 10 can detect the rotation position of the tire in a tire circumferential direction in units of a second length smaller than the first length. The data processing unit 13 includes a force storage unit and an averaging unit. The force storage unit stores force data within the first length in a data storage area in units of the second length. When the force data is stored multiple times at the same tire rotation position, the averaging unit averages the force data.SELECTED DRAWING: Figure 1

The application discloses a kind of tire rotation angle debugging auxiliary devices, including servo scale and reading mechanism;Servo scale is horizontally installed on tire and rotates with tire, and servo scale includes the scale body being arranged along the radial direction of tire;Reading mechanism includes indicating disc, and the gunsight is rotatably connected on indicating disc, and gunsight is used to aim scale body, so that gunsight and scale body are perpendicular to each other;Indicating disc is provided with rotation angle scale, to read the angle of rotation of gunsight, i.e. the rotation angle of tire.The tire rotation angle debugging auxiliary device disclosed in the application can be used for rotation angle measurement operation on the outside of vehicle, without lifting the front axle of vehicle to place angle measurement disc, and the operation process is convenient, efficient, low labor intensity and low risk coefficient.

The application discloses a road surface adhesion coefficient estimation method and medium based on a fast convergence SCKF and adaptive tire stiffness, and the method comprises the following steps: 1) acquiring automobile parameters and real-time sensor signals; 2) establishing a vehicle dynamics model based on the automobile parameters and the real-time sensor signals; 3) calculating tire slip ratio κ ij , tire side slip angle α ij , tire rotation angle δ ij , tire vertical force F z,ij , and establishing a combined brush tire model; 4) establishing a road surface adhesion coefficient estimation system based on the vehicle dynamics model, the combined brush tire model and a fast convergence SCKF estimation algorithm; and 5) solving the road surface adhesion coefficient estimation system to obtain the road surface adhesion coefficient and the tire stiffness. The medium stores a computer program. The application can accurately calculate the road surface adhesion coefficient under various working conditions, and even when the vertical elastic stiffness changes due to tire damage, the method can correctly identify the road surface adhesion coefficient.

The application relates to a large-view-field tire full-circumferential groove depth measuring method based on line structured light, and relates to the field of tire pattern measurement. The application is aimed at solving the problems of low efficiency, great influence of human factors and incapability of automation of the existing tire pattern depth detection method. In the process of rotation of the measured tire, the application collects continuous line laser images on the surface of the tire, generates a depth map by using the line laser images, positions all main grooves on the surface of the measured tire by using the depth map, and calculates the depth of each main groove according to the position of each main groove. The large-view-field tire full-circumferential groove depth measuring method based on line structured light can automatically find the position of the tire and calculate the depth of the tire pattern by driving control of a visual sensor, can quickly find the position of the tire, and can calculate the depth of the main grooves of the tire full circle.

This utility model provides an anti-skid structure for a car tire cover, including a cover body and a friction band fixedly connected to the outer wall of the cover body. A restraint band is connected to the outer wall of the cover body, and a friction-increasing plate is connected to the inner wall of the cover body. Two to five sets of friction-increasing plates are evenly distributed along the inner wall of the cover body. Anti-skid components for increasing the friction between the cover body and the ground are connected to the outer wall of the friction-increasing plates. Friction-increasing components for preventing tire rotation are also connected to the outer wall of the cover body. Evenly distributed grooves are formed on the outer wall of the cover body, and cleaning components for preventing the accumulation of impurities in the grooves are connected to the sidewalls of the grooves. The friction-increasing plates facilitate improved fixation between the tire and the cover body, increasing vehicle safety during driving. The cleaning plates help prevent impurities from accumulating on the outside of the cover body, thus improving the anti-skid performance of the cover body.