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181 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.
Equivalent Model of Continuous Elastomer Knocking Kinematic Pair and Its Modeling Method
ActiveCN114282417BDesign optimisation/simulationSpecial data processing applicationsElastomerMechanical engineering
The present invention belongs to the field of mechanical engineering, and particularly relates to an equivalent model of a knocking kinematic pair of a continuous elastic body and a modeling method thereof. An equivalent model is established for the knocking kinematic pair in a continuous elastic body mechanical structure or system, that is, the non-linear mapping relationship between the knocking pulse force and the knocking initial velocity. By assuming that the knocking force pulse is a half-cycle sine wave, and simultaneously using the Hertz contact model and the origin transfer function or impulse response function of the mechanical structure at the knocking contact point to express the contact mechanical properties of the knocking pair material pair and the impedance properties of the mechanical structure at the knocking part, the relationship between the output and input of the non-linear equivalent model, that is, the knocking pulse force and the knocking initial velocity, is derived. Through the method of the present invention, the problem of rapid prediction of the knocking force pulse of a continuous elastic body mechanical structure can be solved.
Owner:ZHENSHENG (CHONGQING) SCI & TECH DEV CO LTD
Temperature control system and temperature control method for kinematic pair of press transmission system
The invention relates to a temperature control system and a temperature control method for a kinematic pair of a press transmission system in the technical field of presses, and the temperature control system for the kinematic pair of the press transmission system is characterized in that according to the kinematic pair of the press transmission system, a temperature measuring point is arranged at a transmission part which is easy to heat; an infrared thermometer is arranged on a press machine cross beam corresponding to a temperature measuring point and used for directly detecting the temperature of the measuring point, the infrared thermometer is fixed on the press machine cross beam through a mounting support and connected with a programmable logic controller (PLC), and the PLC is further connected with an output display terminal and an overheat alarm. According to the temperature control system for the kinematic pair of the press transmission system, the infrared thermometer for indirectly measuring the temperature is in control connection with the PLC and the lubricating system, so that it is ensured that a transmission part is within a controllable and safe temperature range, and automatic coordination control over the temperature of the transmission part and the lubricating system is achieved.
Owner:YANGLI GRP CORP LTD +1
Robust hydraulic control and simulation system and method for mechanical arm
The invention provides a robust hydraulic control and simulation system and method for a mechanical arm, and the method comprises the steps: determining the position and type of a kinematic pair based on a three-dimensional model, and building a multi-body dynamics simulation system of the mechanical arm; determining a transmission mode according to the hydraulic original drawing, and establishing a hydraulic transmission simulation system of the mechanical arm; and an action execution control algorithm is designed, and a feedback control simulation system of the mechanical arm is established. According to the simulation system, a joint simulation technology is adopted, intercommunication among a multi-body dynamics system, a hydraulic transmission system and a feedback control system is achieved, and a mechanical-hydraulic-control joint simulation platform is formed. On the basis, a robust hydraulic transmission system and a robust feedback control system are designed, and finally the performance of the mechanical arm in the complex environment is improved.
Owner:SHANGHAI JIAOTONG UNIV
High-frequency reciprocating friction testing machine for simulating high-temperature gas environment atmosphere and testing method
PendingCN120121451AUsing mechanical meansInvestigating abrasion/wear resistanceTemperature controlReciprocating motion
The invention discloses a high-frequency reciprocating friction testing machine for simulating a high-temperature gas environment atmosphere and a testing method, and relates to the technical field of basic tribology testing of kinematic pairs under complex working conditions. The high-frequency reciprocating friction testing machine comprises a weight loading and force measuring module, a high-frequency reciprocating motion and temperature control module and a gas environment adjusting module, the weight loading and force measuring module comprises a loading mechanism lifting platform, a loading mechanism and a quick-release clamp; the loading mechanism lifting platform is connected with a loading mechanism, and a quick-release clamp is connected below the loading mechanism; the high-frequency reciprocating motion and temperature control module comprises a lower sample mounting container and a high-frequency voice coil motor module; the sample mounting container is driven by the high-frequency voice coil motor module to reciprocate; the gas environment adjusting module comprises a gas environment box and a gas tank. Multiple influence factors such as the temperature, the motion frequency, the motion stroke, the loading force and the environment atmosphere are comprehensively considered, and a reliable basic tribology test system is established for the kinematic pair under the complex working condition.
Owner:HEFEI UNIV OF TECH
Novel four-degree-of-freedom 3-PRPaRRUPUR space series-parallel manipulator and working method
The invention relates to a novel four-degree-of-freedom 3-PRPaRamp and a preparation method thereof. The invention discloses an RUPUR space series-parallel manipulator and a working method, and belongs to the technical field of space kinematic pair rigid-flexible series-parallel machinery. The RUPUR space series-parallel manipulator comprises a fixed platform, a movable platform, a PRPaR driving branch and an RUPUR series branch chain; the two ends of the PRPaR driving branch and the two ends of the RUPUR series-connection branch chain are connected with the fixed platform and the movable platform, and under the action of the PRPaR driving branch and the RUPUR series-connection branch chain, translation of the movable platform in the three-dimensional direction and rotation of the movable platform in the vertical direction are achieved, so that the movable platform has four degrees of freedom. Meanwhile, the three PRPaR driving branches and the RUPUR series branch chain enable the mechanism to have larger bearing capacity, the mechanism can effectively avoid singular positions under kinematics interference among the four mechanisms and influence of rotating pairs in the mechanisms, the working space of the whole mechanism is increased, and the overall rigidity and flexibility of the mechanism are improved.
Owner:SHANDONG UNIV OF SCI & TECH
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
A new type of sealing structure
The present invention provides a novel sealing structure, belonging to the field of motors. In the present invention, holes are drilled at designated positions on the sealing plate to install bearings, a handle is inserted in the middle of the bearings, the other end of the handle is fixed through a gear, an outer eaves of the sealing plate is provided on the periphery of the handle side of the sealing plate, a slideway is installed on the gear side of the sealing plate, when installing the sealing structure, the sector steel plate is retracted within the area of the sealing plate, after installation and positioning, the handle is rotated to drive the gear to rotate, the gear-rack kinematic pair converts the rotational motion into a linear motion, the sector steel plate is pushed out of the area of the sealing plate to a designated area through the linear motion of the rack in the slideway, and the sector steel plate, the motor end plate and the outer eaves of the sealing plate are fixed through bolts. The present invention greatly improves the sealing performance of large motors, and at the same time solves the single sealing form over a long time, so as to prevent the motor from being damaged after the outer sealing ring fails, and improves the reliable performance of the motor operation.
Owner:JIAMUSI ELECTRIC MACHINE
Gap detection device and gap detection method for robot joints
ActiveCN116710241BProgramme-controlled manipulatorProgramme controlClassical mechanicsKinematic pair
Provided are a device and method for determining the gap between kinematic pairs in a driven joint of a robot having a driving link and a driven link. The gap detection device comprises: a measuring unit that measures the driving torque or current value of a motor when the robot is actually moving along an arbitrary motion trajectory; a simulation unit that sets an arbitrary second gap amount between the kinematic pairs of a plurality of kinematic pairs, simulates the robot moving along the same motion trajectory as the arbitrary motion trajectory, and estimates the driving torque or current value of the motor; a feature quantity calculation unit that calculates a first feature quantity representing fluctuations in a value related to the measured driving torque or current value, and a second feature quantity representing fluctuations in a value related to the estimated driving torque or current value; and a gap calculation unit that calculates an index related to the first gap amount based on the first feature quantity, the second feature quantity, and the second gap amount.
Owner:FANUC LTD +1
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
Rapid installation spherical hinge mechanism
The invention relates to the technical field of mechanical kinematic pair connection, in particular to a rapid installation spherical hinge mechanism. The invention relates to a split type ball bearing which comprises an upper ball bearing, a split type lower ball bearing, a ball head, a connecting rod, a screw rod, a first connecting rod fixed joint, a second connecting rod fixed joint and a connecting rod movable joint, the split type lower ball bearing is installed on the lower end face of the upper ball bearing in a sliding mode, and the ball head part of the ball head is located in a ball socket formed by the upper ball bearing and the split type lower ball bearing. The connecting rod comprises four first rod pieces and four second rod pieces; the split type lower ball tile comprises a first lower ball tile and a second lower ball tile which are symmetrically distributed. The screw is in threaded connection with the two connecting rod movable joints and drives the two connecting rod movable joints to be close to each other or away from each other through rotation so as to push the first lower ball tile and the second lower ball tile to be close to each other or away from each other to be opened. The rapid installation spherical hinge mechanism aims at solving the problem that the disassembly efficiency is low on the occasion that a spherical hinge pair is frequently disassembled.
Owner:CHINA PRECISION ENG INST FOR AIRCRAFT IND AVIC
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
Planar two-movement and one-rotation three-degree-of-freedom parallel mechanism
The invention belongs to the technical field of industrial robots, and particularly discloses a planar two-movement and one-rotation three-degree-of-freedom parallel mechanism which comprises a fixed platform and a movable platform. At least two motion branch chains are uniformly distributed between the fixed platform and the movable platform; the motion branch chain comprises a motor, a first arc-shaped connecting rod and a second arc-shaped connecting rod; the first arc-shaped connecting rod and the second arc-shaped connecting rod are arranged in a reverse bending manner; one end of the first arc-shaped connecting rod is matched with the output end of the motor, one end of the second arc-shaped connecting rod is matched with the movable platform, and the end, away from the motor, of the first arc-shaped connecting rod is in sliding fit with the end, away from the movable platform, of the second arc-shaped connecting rod. Two kinematic pairs exist in each kinematic branch chain, so that the bearing capacity of the kinematic branch chains can be improved, singular points are avoided, jamming in the operation process is prevented, the working space of the parallel mechanism is increased, and the flexibility is improved.
Owner:SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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
A two-mode parallel robot mechanism based on a reconfigurable motion platform
The present application provides a two-mode parallel robot mechanism based on a reconfigurable moving platform, which adjusts the distance between the three V-shaped structures by using a moving pair on the moving platform, and controls whether the axes of the rotating shafts of the connecting rotating pairs intersect, thereby realizing the switching of the two motion modes of the reconfigurable moving platform: three rotations and two movements and one rotation and two movements; the present application can realize the reconstruction of the motion mode without changing the internal motion pairs of the branch chain, which reduces the complexity of the mode reconstruction, reduces the number of drive pairs in the branch chain, and thus reduces the moment of inertia during motion. The structures of the three branches of the present application are completely consistent and do not contain complex motion pairs, and the requirements for the stiffness and assembly accuracy of the mechanism components are relatively low. The overall structure is simple, easy to modularize and process and manufacture, and it can be applied to production and assembly tasks that require multiple motion modes.
Owner:JIANGNAN 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
Spatial multi-body system dynamics modeling method based on Lagrange multiplier method
ActiveCN120524684ADesign optimisation/simulationConstraint-based CADDynamic equationKinetics equation
The invention discloses a spatial multi-body system dynamics modeling method based on a Lagrangian multiplier method. The method comprises the following steps: firstly, establishing a coordinate transformation matrix from a local coordinate system to a global coordinate system of each component in a space; defining the pose of the movable component according to the center-of-mass coordinate and the Euler angle, and determining a generalized coordinate; a position constraint equation is established for the kinematic pair, and numerical expressions of speed and acceleration constraint equations are obtained after primary and secondary derivation; the velocity constraint equation is converted through the spatial angular velocity matrix, the vector cross-multiplication property and the vector cross-multiplication symmetry, and a Jacobian matrix and a numerical expression of a time partial derivative term are obtained; based on the corrected Lagrange multiplier method, considering a cross multiplication term of angular velocity and angular momentum of rotation of the space component, establishing a kinetic equation and solving the kinetic equation; and establishing an association rule of the Euler angle and the space angular velocity to realize conversion between the two. Therefore, the method provided by the invention is suitable for various spatial multi-body systems, solves the difficulty of the existing modeling method in processing complex constraints, and fills up the defects in the prior art.
Owner:SHANGHAI JIAOTONG UNIV
A self-propelled work machine
Owner:ZHEJIANG SUNSEEKER IND CO LTD
Rolling kinematic pair-fronted snake-shaped end-effector mechanism
PCT designated stage expiredWO2025139284A1Shaft for rotary movementSurgical manipulatorsRotational axisKinematic pair
Provided is a rolling kinematic pair-fronted snake-shaped end-effector mechanism. A protrusion is provided at an instrument distal end to cooperate with a rear-mounted Geneva wheel. A pair of drive wires are installed on the Geneva wheel, with pulling of the drive wires driving rotation of the Geneva wheel to realize opening / closing motions of surgical forceps. A clamp jaw opening / closing joint base of the Geneva wheel is connected to a rotating shaft of a rolling joint. Drive wires for the opening / closing joint pass through a guide shaft on the opening / closing joint base into a central bore of the rotating shaft. The drive wires are wound along threads on the rotating shaft and pass through a small hole at the thread center to increase the frictional force on the rotating shaft. The winding process persists until the drive wires have fully covered the threads, after which the wires exit through a symmetrically arranged small hole on a rotating housing. When the rolling joint drive wires are pulled, the drive wires utilize the frictional force to actuate rotation of the rotating shaft, thereby achieving rolling motion of the end-effector. The continuous structure achieves space efficiency and omnidirectional pose transformation flexibility while incorporating an in-situ rotational clamping function at the instrument distal end, effectively reducing the complexity of the drive-control end transmission system and thereby enabling precise vascular tissue manipulation capability at the surgical instrument's distal end.
Owner:BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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
Ankle rehabilitation spherical rotation type medical robot
ActiveCN118528232BProgramme-controlled manipulatorChiropractic devicesPhysical medicine and rehabilitationAnkle rehabilitation
The present invention discloses an ankle rehabilitation spherical rotation type medical robot, which is characterized by comprising a fixed platform assembly and a moving platform; the fixed platform assembly includes a first fixed platform, a second fixed platform and a third fixed platform; a first branch chain is arranged between the first fixed platform and the moving platform; a third branch chain is arranged between the third fixed platform and the moving platform; a second branch chain is further included, one end of the second branch chain is connected to the second fixed platform, and the other end of the second branch chain is connected to the first branch chain. This robot is used to solve the problems of redundant kinematic pairs and complex motion control.
Owner:HENAN GUOJIAN MEDICAL EQUIP 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