27 results about "Tangential force" patented technology

This invention discloses a sensor calibration device and method based on three-dimensional pressure decoupling. It solves the problem that traditional impact calibration devices can only provide impact loads in a single direction and cannot simulate the complex stress state of sensors under the combined action of normal pressure, tangential pressure and confining pressure in real working conditions. This invention uses multiple three-dimensional decoupling components with adjustable tilt angles and a standard force sensor at the bottom to accurately decompose the single axial impact force provided by systems such as drop hammers into normal and tangential forces acting on the sensitive surface of the pressure sensor to be calibrated. Combined with the confining pressure provided by the three-dimensional pressure chamber, it can simultaneously reproduce the multi-dimensional stress state of the pressure sensor in a real soil and rock environment in one system, realizing the performance calibration of one-dimensional sensors under multi-dimensional force coupling.

This invention relates to a torque limiter comprising a first component, a second component, a helical spring, and a positioning component, wherein the first component, the second component, the helical spring, and the positioning component are coaxially arranged along the same axis. According to the invention, the helical spring has a spring body and a first end and a second end extending from the spring body along the axial direction, wherein the spring body is wound on at least a portion of the outer peripheral surface of the first component, and the positioning component is connected to the second component and thereby forms a receiving space accommodating the helical spring and at least a portion of the first component, such that when the second component applies a tangential force relative to the axis at the first end, the first component can rotate in a first direction, and when the positioning component applies a tangential force relative to the axis at the second end, the first component can rotate in the opposite second direction. Also related is a flip-top lid machine and a toilet with a torque limiter.

To provide a wheel flat estimating device, a wheel performance testing device and a key control device for evaluating a wheel re-adhesion control method for allowing proper wheel sliding having the possibility of damaging a wheel and a rail.SOLUTION: The wheel flat estimation device 10 includes a motion analysis part 20 for calculating various parameters by analyzing the behavior between a wheel and a rail when the wheel is fixed, a frictional heat analysis part 30 for calculating the temperature of the tread of the wheel when the wheel is fixed by frictional heat analysis, and a calculation part 30 for calculating the wheel flat based on the calculated temperature of the tread and reference data. The shape estimation device includes a yield stress calculation unit 40 that calculates a wheel yield stress of a wheel, an area calculation unit 50 that calculates an area of a contact ellipse between the wheel and a rail, a comparison unit 60 that compares a magnitude relationship between a tangential stress calculated from a tangential force and the area of the contact ellipse and the wheel yield stress, and an estimation unit 70 that estimates, as a wheel flat shape, a contact ellipse having a minimum area in which the wheel yield stress is determined to be larger than the tangential stress by the comparison in the comparison unit 60.SELECTED DRAWING: Figure 1

The invention discloses a device and a method for testing anisotropic mechanical properties of strong heterogeneity rocks, the device comprises a rotatable rock sample fixing device, a workbench and a sliding track, and a scratching cutter control and data monitoring system, the workbench and the sliding track device main body are fixed on a table top and are convenient to support and move; the slidable scratching system moving track supports the slidable scratching system to move left and right; the rotatable rock sample fixing device is located on the left side above the table top and can fix the position of a rock sample and change the rock scratch angle. The scratching tool control and data monitoring system is located on the right side of the table top and connected with the sliding rail, the slidable scratching system can scratch rocks, and the data monitoring system can monitor and collect tangential force data borne by a tool bit and displacement data of the tool bit in real time; the device and the method for testing the anisotropy of the shale based on the scratches can be researched so as to judge the anisotropy mechanical property of the strong heterogeneity rock.

This invention discloses an electric cutter clamping device, including a tangential force support mechanism, a gripper mechanism, and a gravity support mechanism. These three mechanisms cooperate to automatically fix the electric cutter. The tangential force support mechanism is a hollow structure with a groove, comprising an upper support mechanism and a lower support mechanism that cooperate with each other. The gripper mechanism includes a left gripper structure, a right gripper structure, a left front magnet, a right front magnet, a left rear magnet, and a right rear magnet. The various components of the gripper mechanism cooperate to automatically clamp the electric cutter, maintain its position on the rotating worktable, and prevent the electric cutter from being thrown off by the centrifugal force of the rotating worktable. The gravity support mechanism is a groove-shaped mechanism located below the tangential force support mechanism. This invention simplifies the steps of fixing the electric cutter, reduces the labor intensity of operators, and improves production efficiency and product consistency.

The utility model discloses a positioning device for double-chain pushing, a transportation system and filling machine equipment, and relates to the technical field of transportation. The driving lever assembly comprises a driving lever and a plurality of connecting shafts, the connecting shafts are rotatably arranged on the driving lever in a penetrating mode, and one of the connecting shafts can move on the driving lever in the transmission direction of the chain. The connecting pieces are used for being fixed to the chains, and the two ends of the connecting shaft are used for being detachably connected with the connecting pieces on the two chains arranged in parallel so that the shifting rod can be located between the two chains. According to the positioning device for double-chain pushing, the connecting shaft is rotationally connected to the shifting rod, tangential force borne by the shaft shoulder, connected with the chains, of the shifting rod can be reduced, the risk that the shaft shoulder, connected with the chains, of the shifting rod is broken is reduced, meanwhile, the connecting shaft and the connecting piece can be detached, and the positioning device is convenient to use. The shifting rod assembly can be rapidly replaced, and the stability of double-chain material pushing is improved.

This invention provides an additive manufacturing apparatus and an additive manufacturing method. The additive manufacturing apparatus includes a stationary shoulder and a stirring head, with a cavity structure between the stirring head and the stationary shoulder. This cavity structure is connected to a feed channel and a forming port. The tangential force generated by the rotation of the stirring head and the surface texture facilitate the entry of additive material from the feed channel into the cavity. During operation, the stationary shoulder contacts the substrate, leaving only the forming port at the rear edge of the stationary shoulder for the formation of the additive layer. The feed channel in the stationary shoulder structure ensures that the additive material smoothly reaches the cavity structure. The stirring head penetrates the substrate, and through a stirring and friction process, softens and plastically flows the additive material, ensuring full contact with the substrate. As the welding tool moves, an additive layer is formed at the forming port on the rear side of the travel direction.

The invention relates to the technical field of pressure sensors, and provides a three-dimensional force measurement method and system based on a normal pressure array, and the method comprises the steps: arranging an elastic layer with preset model parameters on a normal force array sensor, and applying preset pressure to the elastic layer, obtaining a pressure resultant force and a pressure center offset of the normal force array sensor, and obtaining a corresponding tangential force according to the pressure resultant force and the pressure center offset; in order to ensure the measurement accuracy of the tangential force, the model parameters are calibrated and preset through calibration, so that the model parameters are more accurate, the precision of three-dimensional force measurement is improved, and the thickness of the whole sensor measurement mode can be effectively controlled, so that the sensor can be conveniently mounted in a narrow space such as a sole to measure related parameters, and the measurement accuracy is improved. And the application range is wide.

The invention relates to the technical field of wedge mechanisms, and discloses a rack type upturning wedge mechanism which comprises a wedge base, a linkage axial part is arranged on the wedge base, power execution parts are correspondingly arranged on the two sides of the linkage axial part in a matched mode, and the power execution parts on the two sides are in running fit with the linkage axial part. Power is transmitted in a tooth surface meshing mode, the contact point of the rack and the gear is located on the circumferential face of the outermost side of the gear all the time, pure tangential acting force is formed, no torsion is generated, the acting force direction is completely consistent with the transmission direction, force loss component force does not exist, and due to the outermost side tangential contact design, the transmission efficiency is greatly improved. Driving resistance is greatly reduced based on the principle of arm of force maximization, namely the closer to the outer side of the gear, the longer the arm of force is, the smaller the needed driving acting force is, efficient and labor-saving driving is achieved, meanwhile, the tangential force characteristic thoroughly avoids vertical friction component force of a traditional structure, and meshing friction resistance is further reduced to the minimum.

The invention provides a slope terrain gait planning method and device for an underwater quadruped robot, and relates to the technical field of robot control, and the method comprises the steps: obtaining the trim angle of a robot body and a slope tilt angle, and determining the maximum trim angle of the robot on a current slope; whether the maximum trim angle is larger than or equal to the slope inclination angle or not is judged, if yes, a preset gait is adopted for climbing, and if not, the gait of the robot is dynamically adjusted; for the supporting legs, minimization of the tangential force of the front supporting legs and approaching of the propelling force of the rear supporting legs to a target value serve as optimization targets, under the condition that force and moment balance, friction cone constraint and pressure constraint are met, target foot end force of all the supporting legs is dynamically distributed, and control instructions of corresponding joints of all the supporting legs are executed; for the swinging legs, the gait cycle is prolonged according to the difference value between the slope inclination angle and the maximum trim angle, the swinging height of the front swinging leg and the falling point position of the rear swinging leg are adjusted in a self-adaptive mode, and control instructions of the joints corresponding to the swinging legs are executed.

The invention discloses a new material plastic pipe strength detection device based on stable mechanical stress, relates to the technical field of pipe detection, and aims to solve the technical problem that the accuracy of a test result is influenced by fluctuation of stress applied to a sample, the new material plastic pipe strength detection device comprises a pipe body, a spiral blade is integrally formed in the pipe body, and a retaining assembly comprises an elastic plate; the pressure applying mechanism comprises an anchoring head, a steel ball used for detecting the anchoring head is arranged on the inner wall of the containing groove, the constant force loading mechanism comprises a force applying arm, an assembling plate and a counterweight assembly installed in the assembling plate in a sliding mode, and rolling wheels are rotatably installed at the bottom end of the force applying arm. The device has the advantages that constant force loading is achieved through combination of the balance weight and the lever, fluctuation of a hydraulic / pneumatic system and drifting of electronic elements are avoided, force application is stable and accurate, the device is adaptive to a spiral structure of a pipe, tangential force and axial force detection can be carried out, detection is comprehensive, operation is convenient and fast, the device is adaptive to different detection standards, and the accuracy and repeatability of a detection result are effectively improved.

Method for determining the available frictional contact between at least one wheel (18) of a rail vehicle (10) and a running surface (12) of a rail on which the at least one wheel (18) rolls, comprising the following steps: - Contact at least one magnetic track brake (20) with the running surface (12) of the rail, - Determine at least one contact force (40) between the at least one magnetic track brake (20) on the running surface (12), - Determine at least one tangential force (42) between at least one magnetic track brake (20) and the running surface (12), - Determining the available frictional engagement between wheel (18) and driving surface (12) by processing at least one contact force (40) and at least one tangential force (42), wherein the at least one magnetic track brake (20) is used in such a way that no significant deceleration of the rail vehicle (10) occurs, and wherein the at least one magnetic track brake (20) is used in such a manner, that the procedure for determining the available frictional engagement is separate from a method for generating a braking force for braking the rail vehicle (10) is carried out.

This invention discloses a double-sided polishing control method and system based on the concave-convex shape of the polishing disc surface, belonging to the field of intelligent control technology. The method includes: setting an initial reference rotational speed of the planetary wheel, generating a first initial polishing path and a second initial polishing path; obtaining a first tangential resistance vector and a second tangential resistance vector, calculating the difference in tangential force between the two sides, and triggering a path planner when the difference in tangential force between the two sides is greater than or equal to a preset threshold; obtaining a first compensation speed increment and a second compensation speed increment; modulating the initial external gear rotational speed of the planetary wheel to obtain a modulated speed signal; sending the modulated speed signal, the first compensation speed increment, and the second compensation speed increment to the upper and lower disc drive motors of the planetary wheel to obtain a first reconstructed polishing path and a second reconstructed polishing path. This solves the technical problem in the prior art where uneven force on the upper and lower surfaces during double-sided polishing leads to poor polishing uniformity, achieving the technical effect of improving the uniformity of double-sided polishing of the workpiece.

The invention discloses a dynamic modeling method for IAS response disturbance caused by initial peeling extension evolution of a deep groove ball bearing outer ring. Comprising the following steps: establishing a fault model of initial peeling of an outer ring raceway, performing parametric modeling on a sharp edge, an arc edge and an oblique angle sharp edge before and after peeling evolution, and calculating contact deformation before and after a rolling body passes through a peeling area. Calculating the normal contact force between the rolling body and the inner and outer ring raceways, considering a rolling resistance friction model and additional displacement excitation, and deducing an angle change tangential force excitation function; and respectively deducing the tangential impact forces of the three edge shapes in the evolution process of the spalling region. Through an angular domain modeling method, an angle sequence is used as an independent variable, an instantaneous angle parameter is explicitly expressed in a differential equation, an IAS dynamic differential equation set of initial peeling evolution of the outer ring of the deep groove ball bearing is constructed, and a fourth-order Runge-Kutta method is used for solving IAS response of the bearing. And the IAS dynamic response of the deep groove ball bearing during initial peeling evolution of the outer ring raceway can be effectively and accurately obtained.

The application relates to the technical field of pressure sensors, and provides a three-dimensional force measurement method and system based on a normal pressure array, which comprises the following steps: arranging an elastic layer with preset model parameters on a normal force array sensor, and applying preset pressure to the elastic layer, so as to obtain the pressure resultant force and pressure center offset amount of the normal force array sensor, and obtaining the corresponding tangential force according to the pressure resultant force and pressure center offset amount; and in order to ensure the measurement accuracy of the tangential force, the preset model parameters are calibrated and corrected, so that the model parameters are more accurate, the three-dimensional force measurement accuracy is improved, and the thickness of the whole sensor measurement mode can be effectively controlled, the sensor is convenient to install in a narrow space such as a foot bottom to measure relevant parameters, and the application range is wide.

This invention discloses a high-power-density planetary traction drive. A loading wedge space and a balancing space are formed on both sides of the radial distance circumference between the planetary rollers and the outer ring. A loading roller is located within the wedge-shaped loading space and rolls in contact with the planetary rollers and the outer ring. A balancing idler wheel is provided in the balancing space. The planetary rollers, balancing idler wheel, and loading rollers are all floating, with the loading rollers abutting against the planetary carrier. The torque or counter-torque transmitted by this invention can directly act on the loading rollers, achieving adaptive loading and making the loading process faster and more flexible. Optimization of the load in the contact area also improves the service life of the traction drive. The superposition of contact forces generates a larger clamping force, thereby ensuring sufficient tangential force in each contact area to transmit power. Furthermore, the planetary traction drive provided by this invention can achieve high-load transmission under the load-sharing effect of multiple rollers. The zero-spin design based on cylindrical rollers also minimizes power loss, resulting in high power density and improved transmission accuracy and efficiency.

(Main claim) Friction coefficient measurement system for a vehicle, comprising a freely rotating sensor sphere provided with a rubberized running surface and having sensors for measuring rotational speed, normal and tangential forces, wherein the sensor sphere is in direct contact with the road surface and the coefficient of friction between the sphere and the road surface is calculated in real time.

This invention provides a method for evaluating the vibration reduction performance of an elastic ring-type pivot vibration suppression device. The elastic ring-type pivot vibration suppression device includes a coaxial rigid outer ring, an elastic ring, and a bearing outer ring arranged from the outside in. The method includes: obtaining the oil film force F at the design speed; and calculating the oil film radial force F based on the oil film force F. r Oil film tangential force F t According to formula F r / F t The vibration reduction performance value Kc at the design speed is calculated and compared with the vibration reduction performance evaluation index to evaluate the vibration reduction performance of the elastic ring support vibration suppression device at the design speed. The evaluation method designed in this invention can effectively evaluate the vibration reduction effect of the elastic ring support vibration suppression device design at an earlier stage, and can be used to guide the design of the elastic ring support vibration suppression device.

The application relates to the technical field of mechanical arms and discloses a multi-dimensional force detection structure, which comprises an outer cylinder, an inner shaft with one end extending into the outer cylinder, and a force detection assembly comprising a first MEMS force sensor, a second MEMS force sensor, a third MEMS force sensor and a fourth MEMS force sensor; the first MEMS force sensor can detect the acting force in a first direction; the second MEMS force sensor can detect the acting force in a second direction; the third MEMS force sensor can detect the acting force in a third direction; and the fourth MEMS force sensor can detect the tangential force when the inner shaft and the outer cylinder rotate in the third direction. The multi-dimensional force detection structure disclosed by the application has high detection precision, strong anti-creep ability and small temperature drift, and overcomes the technical prejudice that the prior art can only use strain gauge type sensors to detect the stress in each direction due to the structural limitation of the multi-dimensional force detection structure.

The invention belongs to the technical field of bearing testing, and particularly relates to a radial sliding bearing identification test device and system. Comprising a sliding bearing test device and a rotating shaft radial loading device. The testing device has the beneficial effects that the testing device can effectively simulate vortex motion formed by a rotating shaft under the driving of tangential force of a liquid film when the rotating shaft operates in a cylindrical sliding bearing through a bearing supporting form with one end fixed and the other end floating, and the vortex motion is parameterized in a vibration form; compared with the prior art that only testing can be carried out on the whole machine, interference factors of other bearings of the whole machine are eliminated, and obtained data are more accurate; by changing the loading force, the angle, the rotating speed and the medium temperature and flow, the vortex influence of different loading forces in all directions on the bearing is calibrated.

The application discloses a single-tooth cutting force measuring method for a hard alloy circular saw blade, and belongs to the technical field of cutting force measurement. The method comprises the following steps: preparing a single-tooth equivalent saw blade with the same diameter and tooth shape parameters as a multi-tooth saw blade to be measured; feeding a workpiece at an equivalent speed obtained by dividing a normal feeding speed by the number of teeth; building a three-way strain measuring device of a square cross-section force bar, and pasting strain gauges on three surfaces of the force bar; executing cutting at a cutting end point and collecting strain signals; and calculating tangential force, axial force and radial force according to bending theory. The application eliminates multi-tooth load coupling through a single-tooth equivalent cutting principle, indirectly measures by using a force bar to avoid signal transmission difficulty of a rotating part, and has the advantages of high precision, low cost and simple operation.

The utility model relates to the technical field of speed measurement tools, in particular to a sensor speed measurement tool, which comprises a mounting frame mounted on the outer side of a conveying platform. A positioning assembly is arranged between the mounting frame and the conveying platform, a bearing plate used for bearing a sensor is fixedly mounted at the upper end of the mounting frame, a locking assembly used for limiting the vertical position of the sensor is connected to the end face of the bearing plate, the sensor is obliquely arranged above the conveying platform, and the sensor is fixedly mounted on the bearing plate. According to the utility model, through the design of the mounting rack and the bearing plate, the sensor to be detected can be conveniently mounted and supported, and meanwhile, through the design of the pressing assembly and the locking assembly, the sensor is subjected to front-back and up-down limiting locking, so that the position stability of the sensor during detection is ensured; meanwhile, the sensor is obliquely arranged above the conveying platform, so that when the conveying belt of the conveying platform rotates, most tangential force of the detection wheel during rotation can be effectively counteracted.

The invention discloses a surface dynamic adaptation type touch detection sensor. The sensor comprises a plurality of sensing modules arranged in an array; each sensing module comprises a ball thimble, a force buffer unit and a flexible pressure sensing unit; a ball is embedded in the front end of the ball ejector pin, the ball is used for contacting with a measured object, and the ejector pin is only allowed to move along the normal direction of the contact surface of the sensor and the measured object; the force buffering unit is used for buffering and transmitting normal pressure, the first end of the force buffering unit is connected with the end, away from the ball, of the ejector pin, and the second end of the force buffering unit is connected with the flexible pressure sensing unit through a force conduction medium; the flexible pressure sensing unit is used for detecting normal pressure, and the pressure corresponds to the movement stroke of the ball ejector pin. According to the application, the interference of tangential force on normal pressure detection in the sliding process can be eliminated, local self-adaptive fitting of any complex curved surface is realized, and the detection precision and the adaptive capacity are effectively improved.

This invention discloses a loading-type planetary traction drive, in which a wedge-shaped loading space is formed on both sides of the radial distance circumferential direction between the planetary rollers and the outer ring. A loading roller, located within the wedge-shaped loading space and in rolling contact with the planetary rollers and the outer ring, is provided with an initial preload towards the radial distance. Both the planetary rollers and the loading roller are floating, and the loading roller transmits power to the planetary carrier. The torque or reaction torque transmitted by this invention can act directly on the loading roller, achieving adaptive loading and making the loading process faster and more flexible. Optimization of the load in the contact area can also improve the service life of the traction drive. The superposition of contact forces can generate a larger clamping force, thereby enabling each contact area to generate sufficient tangential force to transmit power. Furthermore, the planetary traction drive provided by this invention can achieve high-load transmission under the load-sharing effect of multiple rollers, and the zero-spin design based on cylindrical rollers can also minimize power loss and improve transmission accuracy and efficiency.

The invention discloses a chassis of an unmanned logistics transport vehicle and the unmanned logistics transport vehicle, and belongs to the technical field of transport vehicle chassis, the chassis comprises a chassis main body, a mounting frame, a vehicle body main body, a pressure reduction assembly, an offset assembly and a sliding assembly; a mounting frame is fixedly mounted on one side of the chassis body, a vehicle body is fixedly mounted on one side of the mounting frame, and a supporting bottom plate is fixedly mounted on the inner wall of the chassis body. According to the chassis of the unmanned logistics transport vehicle and the unmanned logistics transport vehicle, through cooperation of the pressure reduction assembly, the deviation assembly and the sliding assembly, the problems that turning collision protection is insufficient and steering efficiency is low are solved, the deviation assembly is adjusted in a self-adaptive mode, the sliding assembly is driven to be finely adjusted so that an anti-pressing belt can be attached to an obstacle, and rigid collision is prevented; the anti-pressing belt decomposes lateral extrusion force into tangential force and transverse component force, the tangential force drives the anti-pressing belt to rotate around the rotating roller, the transverse component force pushes the vehicle body to slightly move laterally, the vehicle is assisted to steer smoothly along the track of the anti-pressing belt, efficiency is improved, and rigid impact is avoided.

The method is mainly applied to the technical field of vehicle engineering. The invention discloses a vehicle drift control method, device and equipment based on a tire force vector and a medium. The method comprises the following steps: firstly, determining the maximum total tangential force of a tire of a target vehicle in a sliding state; secondly, analyzing a tire force vector, and determining a geometrical relationship among a tire thrust angle, a front wheel steering angle and a vehicle side slip angle when the vehicle reaches the maximum maneuvering characteristic; constructing a vehicle drift dynamics model by taking the geometrical relationship and the maximum total tangential force as constraint conditions; obtaining a turning radius path of the target vehicle as model input, and determining a drift balance point under the maximum maneuvering characteristic through a model; a control target is set according to the balance point, a control signal is generated and sent to a steering and driving execution mechanism, and stable drifting of the vehicle is achieved. According to the scheme, the steady-state drift balance point can be accurately found out, and the controllability and safety of the vehicle under the limiting working condition are remarkably improved.

The invention discloses a novel air bearing for ground micro-low gravity simulation of a solar sail and an implementation method of the novel air bearing, and belongs to the technical field of air bearings. The bearing comprises a bearing shell, a bearing cover, a throttler arranged at the bottom of the shell and a negative pressure cavity. The core of the device is that at least one ultrasonic elliptical exciter is integrated, and the exciter is driven by phase-controlled piezoelectric ceramics to generate a high-frequency elliptical motion track. When the bearing is suspended on the air film, the exciter driving foot is in contact with the supporting surface to generate controllable tangential force, and the controllable tangential force is used for accurately compensating gliding force caused by the gravity component in the experiment process. Through deep fusion of air floatation support and active tangential force control, the technical problem that a traditional air floatation bearing cannot resist sliding force is effectively solved, and high-fidelity and drifting-free dynamics simulation of ground expansion experiments of spacecrafts such as solar sails is ensured.