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118 results about "Kinematic pair" patented technology
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A kinematic pair is a connection between two physical objects that imposes constraints on their relative movement. Franz Reuleaux introduced the kinematic pair as a new approach to the study of machines that provided an advance over the motion of elements consisting of simple machines.
Three-component joint simulation system and method based on MAA
The invention discloses an MAA-based three-dimensional joint simulation system and method, and relates to the technical field of network system simulation, and the method comprises the steps: building a control system model according to an expected control function and response performance index of a target system, setting an input / output interface, and generating an FMU file of a dynamic response model of the control system; building a finite element analysis model based on detailed geometric information and material mechanics parameters of the structure, applying structural constraints and loads, obtaining structural modal information, and generating an MNF file bearing the structural modal information: importing an FMU file and the MNF file, establishing a joint simulation model in combination with a kinematic pair and constraints, and calculating and outputting kinematic and dynamic data of the system; data combination is carried out through data conversion interfaces between the modules, real-time interaction and dynamic closed-loop optimization of interdisciplinary data are achieved, the system design is more comprehensive and accurate, and the overall performance and the optimization effect are improved.
Owner:SHANGHAI UNIV OF ENG SCI
High-integration driving unit with active variable geometric positioning parameter function
The invention discloses a high-integration driving unit with an active variable geometric positioning parameter function. The high-integration driving unit is mainly composed of a wheel assembly, a suspension system, a first actuator and a second actuator. The actuator is arranged on the upper control arm, so that the mechanical load borne by the actuating mechanism during working is effectively reduced. The interior of the actuator is driven by a self-locking mechanism, continuous energy consumption is not needed when positioning parameters are maintained, and the steady-state power consumption of the system is remarkably reduced. In the aspect of mechanism connection, through combined arrangement of kinematic pairs, accurate matching of the degree of freedom of movement of the mechanism is achieved, the problems of interference and movement uncertainty in the adjusting process are effectively solved, and the accuracy of action execution is ensured. The unit integrates the functions of steering, active variable camber, active variable kingpin caster angle and fault tolerance. Dynamic real-time adjustment of geometric parameters is achieved through the compact structural layout, the vehicle control limit and stability are improved, and meanwhile the space utilization rate and work reliability are extremely high.
Owner:JILIN UNIVERSITY
Automobile seat back plate device with angle adjusting table plate
The utility model discloses an automobile seat back plate device with an angle adjusting table plate, and relates to the field of automobile spare parts, an automobile seat back assembly comprises a back plate body and a table plate pivoted to the back plate body, and the table plate and the back plate body form a kinematic pair through a multi-stage positioning hinge mechanism; the multi-stage positioning hinge mechanism comprises two bearing base rods which are symmetrically arranged, two mounting bases which are matched with the bearing base rods in an aligned manner, and an angle adjusting mechanism. According to the device, through innovative structural design, the function of flexibly adjusting the table plate angle is achieved, the problems that a traditional small table plate of an automobile seat cannot be kept horizontal, use is inconvenient and comfort is poor due to adjustment of the seat backrest angle can be effectively solved, the requirements of passengers for table plate use at different seat backrest angles are met, and the practicability is high. The use experience and the comfort degree of passengers are remarkably improved, and high practicability and market application value are achieved.
Owner:XIANGXIN AUTOMOTIVE COMPONENT TOOL & DIE
Translation-rotation parallel mechanism with motion decoupling and position positive solution symbolization
The invention relates to the technical field of mechanism science, in particular to a motion decoupling and position positive solution symbolization one-translation and one-rotation parallel mechanism which comprises a static platform and a movable platform, and a first simple branch chain and a second simple branch chain are connected between the static platform and the movable platform; the first simple branch chain is formed by connecting a first moving pair and a first rotating pair in series, and the second simple branch chain is composed of a second moving pair, a second rotating pair, a third rotating pair, a fourth rotating pair and a fifth rotating pair. Rotation of the movable platform around the axis of the first rotating pair is determined by input of the first moving pair and the second moving pair, motion decoupling is achieved, and a symbolic position positive solution is easy to obtain. The whole parallel mechanism is composed of seven kinematic pairs, the number of the kinematic pairs is relatively small, potential machining errors, assembling gaps and the number of abrasion points can be reduced, the error transmission path between the kinematic pairs can be reduced, errors accumulated on the movable platform can be reduced, and the output motion precision of the movable platform can be improved.
Owner:CHANGZHOU UNIV
Camera assembly and vehicle
The utility model relates to the technical field of camera equipment, and discloses a camera assembly and a vehicle, and the camera assembly comprises a camera, a cover plate, a driving device, and an output shaft; the kinematic pair mechanism is provided with a first rotary connecting part and a second rotary connecting part which are arranged at an interval, the first rotary connecting part is connected with the output shaft, and the second rotary connecting part is suitable for rotating around the output shaft and forming a first motion path with variable strokes; the peripheral surface of the kinematic pair mechanism rotates around the output shaft to form a second motion path with variable stroke; and the camera movement mechanism and the cover plate movement mechanism are respectively connected with one of the second rotary connection part and the peripheral surface of the kinematic pair mechanism. According to the camera assembly provided by the utility model, the cover plate and the camera can be driven to move by utilizing the driving device and the matched transmission mechanism, so that the camera can extend out in a working state and the cover plate can be turned outwards synchronously.
Owner:BEIJING JINGWEI HIRAIN TECH CO INC
Active heating method and system for 2D rotary table servo mechanism
PendingCN122131849Areduce weightlow costAuxillary controllers with auxillary heating devicesHeat stabilityExtreme temperature
This invention provides an active heating method and system for a two-dimensional turntable servo mechanism, belonging to the field of laser communication technology. The method includes acquiring the feedback temperature and motor torque of the azimuth or pitch axis; when the motor torque is zero and the difference between the feedback temperature and the preset temperature is outside the preset temperature range, heating is performed by determining a first heating power based on the first d-axis current and the electrical control angle; when the motor torque is not zero and the difference between the feedback temperature and the preset temperature is outside the preset temperature range, heating is performed by determining a second heating power based on the second d-axis current and the q-axis current, until the temperature difference returns to the preset range and heating stops. This invention utilizes the heat generated by the motor's own current to replace external heating devices, achieving uniform heating from within, effectively reducing deformation and frictional torque fluctuations in key moving parts caused by temperature gradients, and improving the turning table's pointing accuracy and thermal stability under extreme temperature changes.
Owner:BLUE STAR OPTICAL (SHANGHAI) AEROSPACE TECH CO LTD
An autonomous work device
Owner:ZHEJIANG SUNSEEKER IND CO LTD
A method for stability analysis of a conjugate cam link beating-up mechanism with clearance motion
The application discloses a kind of gap-containing kinematic stability analysis methods for conjugate cam connecting rod beating-up mechanism, including corresponding gap-containing kinematic pair geometric constraint of construction, the motion gap includes the first motion gap between roller and conjugate cam and the second motion gap between reed and mounting hole;Respectively construct the mechanics model corresponding to the first motion gap and the second motion gap;Utilize the theory of multi-rigid-body system dynamics to construct the dynamics model of gap-containing kinematic pair containing the first motion gap and the second motion gap;Optimization function for optimizing each connecting rod length and horizontal angle is constructed, and the best optimization scheme is obtained based on solving with the dynamics model of gap-containing kinematic pair.The method provided by the application can effectively reduce the influence of gap on the motion performance of conjugate cam connecting rod, so as to ensure the stable work of beating-up mechanism.
Owner:ZHEJIANG UNIV OF TECH +1
Intelligent measurement and control system and method for friction and wear test machine of typical kinematic pair of aircraft exhaust nozzle
ActiveCN116429624BSustainable transportationInvestigating abrasion/wear resistanceAviationControl system
The application provides an intelligent measurement and control system and method for a friction and wear tester of typical motion pairs of an aircraft tail nozzle, comprising: a state monitoring module: obtaining the deflection angles of horizontal actuators and vertical actuators in a motion loading control module; an image acquisition module: acquiring motion images of a test piece, and obtaining pose data of the test piece based on the acquired motion images of the test piece; a digital twin system module: controlling the motion loading control module based on the obtained pose data of the test piece and the deflection angles, and realizing friction and wear tests of typical motion pairs of the aircraft tail nozzle under preset temperature, load and motion form test conditions. Based on the digital twin technology, the application realizes accurate control of temperature, load and motion form of the friction and wear test of the typical motion pairs of the aircraft tail nozzle and state monitoring of a test system.
Owner:SHANGHAI JIAOTONG UNIV
Method for analyzing influence of rod length error and kinematic pair gap on motion of ornithopter
The invention discloses a method for analyzing the influence of a rod length error and a kinematic pair gap on the motion of an ornithopter. The method comprises the following steps: carrying out kinematic modeling on an ornithopter structure to obtain a kinematic model; acquiring a motion trail of the end point of the tail end of the outer wing in the kinematic model as a first influence factor; the average flapping position change of the rod piece at the tail end of the outer wing is obtained in the kinematic model to serve as a second influence factor; performing margin modeling on the ornithopter structure in combination with the first influence factor and the second influence factor to obtain a margin model; and performing reliability solution analysis on the input ornithopter to be analyzed according to the margin model. According to the method, the error influence can be accurately captured, and the actual working state of the ornithopter can be more accurately reflected by defining the motion trail of the end point of the tail end of the outer wing and the average flapping position change of the rod piece at the tail end of the outer wing as influence factors of specific reliability. The two indexes are directly associated with the key parameters of the flight performance of the ornithopter, thereby ensuring that the evaluation of the system reliability is closer to the reality.
Owner:HOHAI UNIV
A self-propelled work machine
Owner:ZHEJIANG SUNSEEKER IND CO LTD
Blade batch clamping tool and posture switching method
This invention belongs to the field of tooling and fixture design technology in laser cladding repair of aerospace products, specifically relating to a tooling for batch clamping of blades and a method for attitude switching. The tooling includes a base, a support and positioning structure, and a blade clamping structure. This tooling is easy to operate and highly practical. By setting built-in springs and sliders on the blade cells, it achieves automatic blade locking, shortening clamping time and reducing the welding repair cycle. By setting a rotary kinematic pair on the support plate, this tooling achieves angle switching functionality, greatly shortening working time and improving labor productivity; compared with existing blade positioning, clamping, and repair processes, it reduces labor intensity and improves product repair quality.
Owner:STATE OWNED SIDA MASCH MFG CO LTD
Anti-misloading and friction-reducing thrust plate
The utility model discloses a thrust plate capable of preventing misloading and reducing friction, which comprises two semi-annular thrust plate bodies with the same structure, an oil groove is arranged on the thrust surface of each thrust plate body, the oil groove is of a semi-closed structure, and the open end of the oil groove is positioned on the inner arc surface of each thrust plate body; the opening width and the opening depth of the oil groove are gradually reduced along the outer edge direction of the thrust plate body; the cross section of the oil groove is wedge-shaped, and when the crankshaft rotates, the gap of the oil groove is gradually reduced in the tangential direction of forward rotation of the crankshaft. According to the utility model, engine oil can reversely push the crankshaft through the wedge effect, so that the crankshaft and a thrust plate kinematic pair are incompletely contacted, a layer of oil film is quickly formed between the crankshaft and the thrust plate kinematic pair, and the friction work is reduced; and meanwhile, redundant flowing-out engine oil can take away friction heat generated between the thrust surface of the crankshaft and the thrust plate, so that the cooling effect is achieved, and the reliability and economical efficiency of the engine are improved.
Owner:GUANGXI YUCHAI MASCH CO LTD
Bionic artificial muscle and bionic robot
The application discloses a kind of bionic artificial muscle, including center axis and the kinematic pair being arranged around the center axis, the kinematic pair is arranged on the side of the center axis with uniformly distributed ball socket contact, the center axis is arranged on the side of the kinematic pair with at least one group of alternate action and can be moved along the length direction of the center axis and perpendicular to the center axis direction link, when the link moves along the direction perpendicular to the center axis, the end of the link close to the kinematic pair can be inserted into the ball socket contact.The application also discloses a kind of bionic robot comprising the above-mentioned bionic artificial muscle.The application can highly restore the structural characteristics of biological muscle, effectively reproduce the excellent comprehensive performance of biological muscle.
Owner:ZHEJIANG LAB
Cartridge case machining equipment and machining method
The invention discloses cartridge case machining equipment and a machining method, and is applied to the technical field of bullet manufacturing, the cartridge case machining equipment comprises an indexing rotation device, a plurality of stations are arranged in the circumferential direction of the indexing rotation device, the indexing rotation device comprises a rotation driving mechanism and a cargo carrying disc, and the cargo carrying disc is provided with a plurality of mounting holes used for mounting cartridge cases; the execution devices are arranged on the corresponding stations in the rotation direction of the indexing rotation device and used for executing feeding, ejecting, cutting, deburring and returning operation on the cartridge cases located on the stations; the cam group driving device is provided with a driving shaft, and the driving shaft is coaxially and fixedly connected with a first driving wheel and a second driving wheel; the first driving wheel drives the cargo carrying disc to rotate through the rotary driving mechanism so as to switch each mounting hole to the next station; and each execution device and the second driving wheel or the rotary driving mechanism alternatively form a cam-driven piece kinematic pair. And a single driving mode is adopted to realize multi-step integrated processing of the cartridge case, so that the processing efficiency is improved.
Owner:CHONGQING CHANGJIANG ELECTRIC IND GRP CO LTD
Noise evaluation method, device and equipment of compressor, medium and program product
The invention relates to a noise evaluation method, device and equipment of a compressor, a medium and a program product. The method comprises the steps that a multi-body dynamics simulation model corresponding to the compressor is established based on geometric structure parameters of all parts in the compressor and the motion relation between all the parts; the multi-body dynamics simulation model comprises a plurality of body units and kinematic pairs among the body units; on the basis of the multi-body dynamics simulation model and corresponding preset driving of the compressor under the preset working condition, dynamic response of the compressor is predicted, and a prediction result is obtained; and based on the prediction result, the knocking noise risk of the compressor is evaluated, and an evaluation result is obtained. Thus, the actual running state of the compressor can be effectively simulated, the potential knocking problem can be recognized in advance, the knocking abnormal sound problem of the compressor product can be effectively found or predicted without depending on test and error, and the risk prediction capacity and optimization efficiency in the design stage are improved.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD
A comprehensive error decoupling compensation method for a five-axis numerical control lapping and polishing machine tool
This invention discloses a comprehensive error decoupling compensation method for a five-axis CNC polishing machine, comprising: 1. establishing homogeneous transformation matrices for the workpiece kinematic chain and tool kinematic chain of the five-axis polishing machine under ideal and error conditions; 2. establishing a comprehensive error transformation matrix between the coordinate systems of each kinematic pair of the five-axis polishing machine based on the homogeneous transformation matrix; 3. spatially decoupling the comprehensive error transformation matrix of the five-axis polishing machine based on the small error compensation motion assumption, and establishing a comprehensive error compensation model for the five-axis polishing machine to achieve comprehensive error compensation. This invention, through kinematic analysis of a five-axis polishing machine, uses the homogeneous coordinate transformation method to establish a comprehensive error transformation matrix between the coordinate systems of each kinematic pair of the machine tool, spatially decoupling the position and direction error compensation of each motion axis of the five-axis polishing machine, and establishing a comprehensive error compensation model for the five-axis polishing machine, providing a theoretical basis for real-time comprehensive error compensation of a five-axis CNC polishing machine.
Owner:CHANGZHOU INST OF ADVANCED MFG TECH
Elastic-component-driven finger exoskeleton mechanism and elastic-component-driven hand exoskeleton mechanism
The present invention relates to the technical field of finger exoskeletons. Disclosed are an elastic-component-driven finger exoskeleton mechanism and an elastic-component-driven hand exoskeleton mechanism. The finger exoskeleton mechanism comprises: an elastic drive component provided on a side close to the back of the hand and capable of elongating, contracting, bending, and extending; and a plurality of connecting rods, wherein one end of each connecting rod forms a hand fixed pair with a finger knuckle or the palm, and the other end of each connecting rod forms an elastic drive component fixed pair with an end portion of the elastic drive component and forms a compound kinematic pair with a non-end portion of the elastic drive component. The elastic drive component has the following working states: a bending working state, wherein when the elastic drive component elongates, the elastic drive component performs bending movement towards the center of the palm; and an extending movement working state, wherein when the elastic drive component contracts, the elastic drive component performs extending movement away from the center of the palm. By means of the finger exoskeleton mechanism of the present invention, bending of a plurality of finger joints can be independently driven. The finger exoskeleton mechanism has advantages such as good protection performance for fingers, high hand-size compatibility, and many degrees of freedom.
Owner:NANCHANG UNIV
First-gear connecting rod transmission lock body
The utility model discloses a one-gear connecting rod transmission lock body which is mainly composed of a lock shell assembly, a lock cover assembly, a latch bolt assembly, a three-bolt assembly and the like, all the internal assemblies work cooperatively, and through the unique connecting rod transmission design, the problem that a traditional two-gear mechanical lever lock body is jammed and jumps when knocked out or withdrawn is solved. Due to the double-pressure-bearing supporting point design of the three-bolt shifting plate, lock body accessories can bear the axial pressure of 5000 Nm under the condition that heat treatment is not conducted, each kinematic pair is of a low pair structure, abrasion is light, the service life is long, a limiting block on the lock cover prevents the main bolt from being withdrawn, a push plate jumps upwards, a small lock head is arranged at a safety assembly, and safety is improved. During use, the handle, the lock cylinder and other operations can drive the internal components to achieve corresponding actions of the latch bolt, the main bolt and the heaven and earth hook, the functions of door opening, locking and the like are achieved, the overall structure is simple, and the machining and assembling cost is low.
Owner:ZHEJIANG DAXIONG SECURITY TECH CO LTD
Rotation driving device and system applied to aircraft control surface and aircraft control surface
The invention belongs to the technical field of aircraft control surfaces, and particularly relates to a rotation driving device and system applied to an aircraft control surface and the aircraft control surface, the rotation driving device comprises a rotation assembly used for driving the control surface to rotate, and the rotation assembly comprises a connecting piece connected with the control surface and a driving piece connected with the connecting piece and used for driving the control surface to rotate; the driving assembly is used for driving the speed brake to rotate and comprises a first rotating shaft, a second rotating shaft, a rotating part and a driver used for driving the first rotating shaft to rotate, the rotating part is connected with the control surface, the first rotating shaft is connected with the second rotating shaft through a connector, and control surface rotation and a ground speed brake mechanism are integrated into a single movement mechanism; cooperative integration of control surface deflection and speed brake opening functions is achieved, the situation that multiple sets of complex structures of a traditional cracking type control surface coexist is simplified, the number of kinematic pairs and parts is reduced, the occupied space is reduced, meanwhile, the area proportion of the speed brake is effectively increased, the aerodynamic efficiency is improved, and the overall weight is reduced.
Owner:SHANGHAI SECOND POLYTECHNIC UNIVERSITY
Automatic kinematic pair creating method and device and storage medium
The invention relates to the field of computer-aided engineering, and provides a kinematic pair automatic creation method and device and a storage medium. The method comprises the following steps: acquiring assembly data of a mechanical system; for each part, constructing a part level graph structure based on boundary expression data of the part, extracting features of each vertex in the part level graph structure, and obtaining embedded vectors of the vertexes through a neural network model; based on the assembly data, constructing an assembly level graph structure, aggregating vertex embedding vectors of all parts in the assembly level graph structure into feature vectors of the parts, and taking the feature vectors as initial features of assembly level graph vertexes; performing feature learning on the assembly-level graph structure by using a graph neural network, and updating the features of the vertexes; for each edge in the assembly-level graph structure, frame prediction of a kinematic pair is executed through the part-level vertex features, and type prediction is executed through the assembly-level vertex features; in the model training process, the model is trained by optimizing a loss function fused with expert knowledge.
Owner:SHENZHEN POISSON SOFTWARE TECH CO LTD +1
Five-axis robot configuration comprehensive method integrating 2R1T parallel mechanism
PendingCN121989206AGuaranteed work spaceProgramme-controlled manipulatorComplex mathematical operationsSingle degree of freedomControl engineering
The invention discloses a five-axis robot configuration synthesis method integrating a 2R1T parallel mechanism, and belongs to the technical field of robot manufacturing. A two-rotation and one-translation (2R1T) parallel mechanism is a core function module of a five-axis robot, most of the 2R1T parallel mechanisms are parallel mechanisms formed by connecting a plurality of kinematic pairs (such as an R pair, an S pair, a P pair, a U pair and a C pair) in series to form a kinematic branch chain and connecting a plurality of kinematic branch chains in parallel, the two ends of the kinematic branch chain are connected with a static platform and a movable platform respectively, calculation is carried out based on a PRU type kinematic branch chain, and the two-rotation and one-translation (2R1T) parallel mechanism is formed. A series of 2R1T parallel mechanism topological configurations are obtained through the spiral theory, a 2R1T parallel mechanism motion spiral system is analyzed, the 2R1T parallel mechanism and the single-degree-of-freedom joint module are reasonably configured, and it is ensured that the five-axis robot has the motion performance meeting the working requirement.
Owner:FUZHOU UNIV
Modeling and analysis method for suspension four-wheel positioning angle tolerance sensitivity analysis
The embodiment of the invention provides a modeling and analysis method for suspension four-wheel positioning angle tolerance sensitivity analysis, and the method comprises the steps: obtaining the structural information of a suspension system and the geometric data of system parts, and building a multi-body dynamic model based on the structural information and the geometric data; replacing a rigid kinematic pair in the multi-body dynamic model with a bushing pair, and setting a rigidity parameter of the corresponding bushing pair according to the type of the replaced rigid kinematic pair; collecting process information of system parts, designing a hard point tolerance range based on the process information and an error range of the suspension system, and adjusting a pre-offset value of a bushing pair according to the hard point tolerance range; the rigidity parameters and the pre-offset values of different lining pairs are modified for simulation, simulation results of each time are recorded, and the simulation results are compared to determine the sensitivity influence factors of the four-wheel positioning angle.
Owner:CHINA AUTOMOTIVE ENG RES INST +1
Parametric robot adams dynamics modeling method
The application provides a parameterized mechanical arm ADAMS dynamics modeling method, comprising the following steps: obtaining DH coordinates and dynamics parameters required for mechanical arm modeling; calculating interlink recursive relationship of the mechanical arm according to the DH coordinates; establishing design variables of the ADAMS dynamics model of the mechanical arm; describing modeling elements in the ADAMS dynamics model of the mechanical arm according to the design variables and the interlink recursive relationship of the mechanical arm; and modifying mass characteristics of the ADAMS dynamics model of the mechanical arm. The DH coordinates are improved DH coordinates; the modeling elements comprise coordinate systems, geometries, kinematic pairs and driving forces. Therefore, the parameterized mechanical arm ADAMS dynamics modeling can be realized according to the DH coordinates without depending on a three-dimensional entity model of the mechanical arm, the physical meaning is clear, the arm type is adjusted flexibly and conveniently, the interlink size of the mechanical arm or the joint assembly mode can be changed, the reuse of the dynamics model of the mechanical arm is realized, and the development cost of repeated modeling is reduced.
Owner:SHANGHAI AEROSPACE SYST ENG INST
Steering column device and steering wheel adjusting system
The invention relates to the technical field of automobile parts, and provides a steering column device and a steering wheel adjusting system. The steering column device comprises an installation support and a column assembly supported on the installation support, the column assembly comprises a plurality of telescopic pipe fittings which are connected in a sleeved mode, and kinematic pairs are arranged between one or more pipe fittings of the column assembly and the installation support and / or between the pipe fittings of the column assembly. Each group of kinematic pairs is configured to keep contact in a stretching process of a corresponding pipe fitting, and the corresponding pipe fitting is a pipe fitting assembled with a friction part of the kinematic pair. The kinematic pairs are arranged between one or more pipe fittings and the mounting bracket and / or between the multiple pipe fittings of the pipe column assembly, so that the dynamic stability of the pipe column assembly in the telescopic adjustment process is improved, the telescopic adjustment smoothness is ensured, and the reliability and the driving experience are improved.
Owner:TRW AUTOMOTIVE TECH (SHANGHAI) CO LTD
A method for modeling the dynamics of a plastic hinge of a train coupler draft gear
This invention discloses a method for modeling the plastic hinge dynamics of a train coupler device, relating to the field of rail transit vehicle collision safety technology. The method includes: establishing a structural discretization criterion; identifying failure modes of the coupler device under different collision conditions, extracting key mechanical parameters, generating a master list of plastic hinges, and obtaining benchmark simulation data for model verification; based on the discretization criterion and the master list of plastic hinges, discretizing the coupler device into a multi-body system topology consisting of several rigid bodies connected by kinematic pairs; simulating plastic deformation and fracture behavior based on the multi-body system topology; assembling and solving the system dynamic equations to obtain the dynamic response of the coupler device during the collision process and determining the simulation results; and verifying the accuracy of the multi-body dynamics model and evaluating computational efficiency by comparing the simulation results with the benchmark simulation data. This invention significantly improves the depth of collision safety assessment.
Owner:NINGBO UNIV
High-temperature-resistant composite lubricating film in vacuum environment and preparation method of high-temperature-resistant composite lubricating film
The invention provides a preparation method of a high-temperature-resistant composite lubricating film in a vacuum environment, and relates to the technical field of functional materials. Through a magnetron sputtering process, a titanium (Ti) transition layer is deposited on the surface of a metal substrate, and silver (Ag) layers and molybdenum disulfide (MoS2) layers are sequentially and alternately deposited on the surface of the transition layer. Through the gradient heterojunction constructed through interface engineering, the bonding strength between the thin film and the metal matrix is remarkably improved, and the scratch critical load is 30 N or above. Under the severe working condition of 300 DEG C in vacuum, the material shows an ultralow friction coefficient (less than 0.15) and a wear-resistant life gt; 5 * 10 < 5 > r. The lubricating oil is particularly suitable for long-life lubrication of a key kinematic pair of a high-temperature transmission mechanism of a spacecraft.
Owner:LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
Quartz tube mounting device and system
The utility model relates to a quartz tube mounting device and system, in particular to the technical field of photovoltaic cells, and solves the problem that quartz tube mounting equipment is low in mounting precision. The quartz tube mounting device provided by the embodiment of the utility model comprises a bearing assembly, a first propulsion assembly; a second propulsion assembly; a first guide rail; the guide piece is connected with the first guide rail in a sliding manner; and one end of the follower is connected with the bearing assembly, and the other end of the follower is movably connected with the guide piece. According to the quartz tube mounting device provided by the embodiment of the invention, the follower is shifted by the guide piece, the follower drives the bearing assembly to rotate around the vertical axis relative to the first propelling assembly, the guide piece and the follower can form a kinematic pair, and the kinematic pair is high in precision, so that the kinematic precision of the follower driven by the guide piece is high; therefore, the movement accuracy of the bearing assembly rotating around the vertical axis relative to the first propelling assembly is high, fine adjustment can be carried out, and the adjustment accuracy of the quartz tube in the axis direction is high.
Owner:LAPLACE RENEWABLE ENERGY TECH CO LTD
Position-variable large horizontal tire changer
The invention discloses a horizontal tire disassembling and assembling machine for large tires. The horizontal tire disassembling and assembling machine is used for disassembling and assembling large-diameter tires. The disassembling and assembling machine comprises a base, a cross beam sliding way, a cross beam sliding sleeve, a tire disassembling assembly and a position-variable tire clamping component, and the position-variable tire clamping component comprises a cantilever beam, a cantilever beam sliding sleeve and a first driving component, one side of the cantilever beam is provided with a shifting shaft which penetrates out of the sliding groove of the cantilever beam sliding sleeve and can move relative to the cantilever beam sliding sleeve in the axial direction. The supporting sliding column, the cross movement connecting component and the second driving component are fixed on the base to form a movement pair, the cross movement connecting component is provided with a shifting shaft sliding hole which is in sliding connection with the shifting shaft, and the shifting shaft sliding hole is movably connected with the shifting shaft. The cross movement connecting part drives the cantilever beam to rotate by a corresponding angle when moving linearly up and down, and the cantilever beam drives the cross beam slide way to rotate synchronously through the synchronous rotation connecting part when rotating.
Owner:YINGKOU LIAONAN DEVI MACHINERY EQUIP
A torsion-driven high-speed precision punching mechanism
This invention relates to a torsion-driven high-speed precision punching mechanism. The mechanism includes a reduction mechanism, a crank-rocker mechanism, a torsion mechanism, and a balancing mechanism. The reduction mechanism and the crank-rocker mechanism are arranged horizontally on the punching machine base. The torsion mechanism consists of a swing block, connecting rods, and a main slide. The swing block and the main slide are connected to the connecting rods via spherical hinges, the connecting rods are of equal length, and the rotation axes of the spherical hinges of the swing block and the main slide coincide. Two sets of balancing mechanisms are symmetrically arranged on both sides along the centerline formed by the center of the balancing slide and the center of the main slide. Each balancing mechanism consists of a rocker arm, a support rod, a push rod, and a balancing slide. Except for the balancing slide and the main slide, which are connected to the punching machine body via sliding joints, and the connecting rods, swing blocks, and the main slide, which are connected via spherical hinges, all other components are connected by revolute joints. The main mechanism used in this invention has fewer kinematic pairs in the transmission chain and higher rigidity, effectively improving the punching accuracy of the punching machine.
Owner:NANJING UNIV OF SCI & TECH