最新刊期
期 4 ， 2015
- 摘要：In order to study the influence of profile deviations on the contact characteristic of the helical gear,the involutes equation containing the profile form deviation and profile slope deviation is deduced.On the meanwhile,a finite element model containing tooth profile deviations is established.Based on this finite element model,the effect law of the profile form deviation and profile slope deviation on the maximum contact stress,bending stress and load distribution is obtained.The result suggests that the contact strength and bending strength of gears is reduced by the profile form deviation and profile slope deviation and the load distribution status is changed.When the profile form deviation is larger than 5μm or the profile slope deviation equals to ±0.5°,the gearwill gradually change tooth meshing number from three to two,then two to one,which brings certain impact on the carrying capacity of gear.
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发布时间：2022-10-20 - 摘要：The contact ratio is an important performance index of gear transmission,but there is no computational formula of contact ratio for complex tooth surface transmission,such as face gears.The definition of face gear contact ratio is given,and the method of time difference which can be used to calculate face gear contact ratio based on the finite element gear tooth contact analysis is proposed.The contact ratio of loaded and unloaded modification face gear and standard face gear are calculated.The calculation results show that:1)the contact ratio of modification face gears reduce greatly compared with the standard face gears,2)the contact ratio of loaded modified face gears increase greatly compared with unloaded gears.A method to calculate face gear contact ratio is proposed.
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发布时间：2022-10-20 - 摘要：The finite element method is used to investigate the varying mesh stiffness of microsegment gear（MSG）,which is a new type of tooth profile gear.Comparative study by simulation shows that the varying mesh stiffness of MSG is superior to involute gear.Also,the influence law of MSG specific parameter on gear meshing stiffness is also unveiled.These findings could help support further parameter optimization and dynamics study of MSG.
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发布时间：2022-10-20 - 摘要：Based on the theory of mechanical dynamics,the influence on dynamic characteristic of transmission is researched when the tooth generated elastic deformation under load.First,in order to build the transmission dynamic analysis model,the stiffness matrix,mass matrix and node positions information of the transmission box are extracted and combined with transmission part virtual assembly.Then,the mesh misalignment,transmission error and tooth contact condition caused by elastic deformation of tooth are calculated.The effect of tooth elastic deformation on meshing quality of gear pair and dynamic characteristic of transmission are analyzed.Finally,according to the theory of elastic-mechanics,the meshing quality is improved through modification of tooth profiles to achieve the purpose of decreasing the dynamic response of gear pair under load.These results provide references for reducing the elastic deformation of tooth effectively and improving the dynamic characteristic of transmission.
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发布时间：2022-10-20 - 摘要：To research the dynamics characteristics of the belt conveyor in actual working condition,by using the new method to establish the dynamics equation of the belt conveyor,that is through the "flexible beam and belt unit" to establish the mechanics equation,the coefficient matrix is derived.By using the RecurDyn software,the rigid-flexible coupling model of machine is built and according to coefficient matrix,the dynamics analysis is carried out,the dynamic characteristics of the conveying belt is obtained,it shows the conclusion that according to the conditions set by the different conditions of the belt conveyor,the method by using the rigid-flexible coupling simulation analysis is more close to the actual working condition.The correctness and advancement of the rigid-flexible coupling dynamics simulation analysis method are verified.A more effective and closer to the actual method of analysis for improving the system stability and structure optimize is provided.
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发布时间：2022-10-20 - 摘要：An analysis of the gear micro modification is carried out by means of Romax software and a mathematical model of gear modification,and the methods of determining gear tooth surface modification amount are discussed.The research shows that,the gear modification design based on Romax can make the load of tooth surface uniformly distributed,reduce the transmission error and improve the bearing capacity and transmission quality of gear pair.
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发布时间：2022-10-20 - 摘要：The chain transmission system of heavy-duty upender is critical for turning body safe operation and parking,therefore,the reliability analysis of the chain transmission system is indispensable for the research and development of large heavy-load upender.Based on a nuclear large pieces upender which we jointly developed with a heavy machinery factory,the complex force state in the equipment operation process is analyzed.With the application of theoretical analysis and motion simulation method,the dynamic change trend of the chain transmission torque when carrying extreme load in the different flip solutions is got,the biggest stress field of the chain drive system is analyzed with the finite element software ABAQUS.The cost of research and development of the equipment is reduced,the design cycle is shorten,the reliability of equipment operation is improved,which has a certain reference value for the dynamics research of chain drive system in large and heavy equipment mechanics.
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发布时间：2022-10-20 - 摘要：By using the theory of multi-body system and Denavit-Hartenberg homogeneous coordinate transformation,the geometric error and thermal error of face gear NC grinding machine is analyzed.According to the principle of face gear meshing and production mechanism of the grinding error,the mathematic model of comprehensive error contains geometric error and thermal error of the face gear NC grinding machine tool is established.Based on the little error assumption and using Matlab software,the error expression which contains six degrees of freedom is got,additionally,the relationship between the six degrees of freedom and six errors which produced by the grinding wheel spindle movement is analyzed and validated.The basis for improve the machining accuracy of gear and error modeling is provided.
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发布时间：2022-10-20 - 摘要：A novel planar two degree of freedom parallel manipulator is presented,its moving platform of the manipulator has smaller inertia and the output of the manipulator is planar translational motion.Unlike the traditional optimum analysis method,not only the geometric parameters,but also the range of the linear actuators of the manipulator are considered as the kinematics parameters,the design space is obtained by normalizing the actuation and geometric parameter.The dexterity performance index is calculated in the design space,the dexterity atlas of the manipulator is plotted.The dexterity atlas reflects the relationship between the dexterity performance index and the kinematics parameters of the manipulator.The dexterity atlas is very useful for the design of the new manipulator and the new method also provides a simple,comprehensive and effective way for design parallel manipulator that is actuated by linear actuators.
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发布时间：2022-10-20 - 摘要：To the problems of the belt is easy to produce such as fatigue failure and fracture in belt transmission process,with the V-ribbed belt of belt drive system as research object,the V-ribbed belt rubber physical properties is got by the experiment,and the material characteristic getting from the experimental is substituted into the ABAQUS of finite element analysis software to carry out the simulation analysis on the fatigue characteristic of V-ribbed belt.The analysis results show that with the increase of the load,the unit length tensile resistance of V-ribbed belt is increasing and the cycles index are decreases,and with the increase of initial crack size,the unit length tensile resistance of v-ribbed belt is increasing and the increasing rate is reduced,and the cycles index display the trends of first slowly decreases then sharply reduced.With the increase of displacement,the unit length tensile resistance of v-ribbed belt is increasing,and the cycles index are reduced.
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发布时间：2022-10-20 - 摘要：Based on the power method,the roll-off angle is introduced to measure the position of meshing point,and the function relation formula between the modification coefficient and meshing efficiency is derived.The calculation formulation of modification coefficient of the maximum transmission efficiency is put forward through deriving the relation on the basis of extremism value principle for functions.Through the comparing with the experimental results of available literatures,can get to know that the numerical results of the calculation of modification coefficient and transmission efficiency are in good agreement with the experimental results of available literatures.A base for quantitative calculation of the initiative design of gear with addendum modification transmission efficiency is provided through the research work,and it has a certain reference value to the research and application for the gear with addendum modification.
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发布时间：2022-10-20 - 摘要：Based on the geometric principles of the 5-axis CNC forming grinding and machine kinematics principle,the line speed of wheel at any points is deduced.According to the traditional plane grinding force model,these relationships are used that molding grinding involute length is approximately equal to the width of the plane grinding wheel,the diameter of wheel in contact with the tooth surface is approximately equal to the diameter of the plane grinding wheel,the wheel feed amount is approximately equal to the grinding surface grinding depth.So the grinding force model are established,the grinding force simulation program is composed and the experimental schemes are design,lastly this grinding force formula can guarantee a certain precision.
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发布时间：2022-10-20 - 摘要：The structure of electric wheel drive system with gear reducer for single trailing arm suspension is designed.The structural components and assembly relation is illustrated in detail.And the specialty is the motor for this system is placed on the frame.The mechanism of gear transmission and the gearbox,single-trailing arm and frame consist of a four-bar mechanism.The kinetic principle of this mechanism is explained.This four-bar mechanism make the center distance between motor and wheel is variable and ensure the feasibility of the designed structure for electric wheel drive system.At last,the model is established in ADAMS for simulation and prove the superiority of designed system.The proposed structure reduces the unsprung mass of vehicles effectively and improves the ride comfort and wheel ground adhesion for vehicle.
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发布时间：2022-10-20 - 摘要：The thruster mechanism of which two neighboring thruster cylinders are wedge-shape arranged is a redundant driving multi-DOF parallel mechanism.It is very complex to control its motion due to the complexity of the mechanism and the coupling between the driving rods,so a method of establishing inverse kinematics model of the thruster mechanism and graphical model with the SimMechanics in the environment of Simulink diagram design in MATLAB is presented and then connect them by controller.The trajectory tracking control of parallel mechanism is realized and this method is intuition and convenience.A foundation for the precious control of thruster mechanism is laid and it is provide convenience for establishing simulation models of other multi-body dynamic system.
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发布时间：2022-10-20 - 摘要：From the perspective of the optimization design of rail-roader electric wheel,according to the working condition and load conditions of planetary gear,taking the volume,contact ratio,efficiency of NGW planetary gear transmission as the target function,optimization design of gear reducer is carried out based on the theory of reliability.The reliability of gear fatigue strength is combined within the constraint of optimization problem,the optimization parameters such as the minimum volume and quality of the machinery parts and components are obtained,the transmission efficiency remain before optimization level.By the optimization design of planetary gear reducer,the special requirements of rail-roader electric wheel are fulfilled.The reference forthe design of rail-roader provided.
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发布时间：2022-10-20 - 摘要：Based on four degrees of freedom cartesian transfer robot structural model,the method of parametric modeling of the main part and component of the cartesian robot are studied.Considering the actual needs of different production lines,and combined with CATIA virtual design technology and knowledge engineering techniques,the issues of cartesian robot three-dimensional model rapid generation is solved.The three-dimensional standard part and component library is built by CATIA V5R19.The selection of components and automatic generation are achieved,the designer can obtain the structural parameters by considering the user requirements and do some design calculations relevant to the selected design parameter.
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发布时间：2022-10-20 - 摘要：In order to improve the method to design the linkage mechanism of three-roller guiding device installed at the exit of piercing mill,the mathematical model of the multi objective optimal design is established based on comprehensive consideration of the technical requirement,the operation condition and the transmission performance of the mechanism.The fully parameterized virtual prototyping model of mechanism is optimized by simulation to determine the design parameter in the ADAMS environment.Under the given constraints,the simulation results show that the comprehensive performance of the mechanism is significantly improved.
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发布时间：2022-10-20 - 摘要：The optimum design of sleeve roller chain transmission is most researched by the single objective optimization.A multi-objective optimization model of this problem is established by maximum single row chain transmission efficiency and maximum fatigue life.A modified constrained handling strategy and rounding strategy are incorporated into the multi-objective differential evolution algorithm based on gauss mutation and a multi-objective mixed-discrete variables differential evolution algorithm is proposed.The engineering example shows that the optimum results meet the design requirements and the new algorithm is effective and has certain value for other engineering problem.
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发布时间：2022-10-20 - 摘要：Aiming at the unusual moving characteristic of the swing mechanism,a kind of moving model of the swing mechanism is built by using the mathematic modeling method,so that the expectant motion law can be obtained according to the engineering practical to change the parameter of the model.A visual prototype of the swing pump movement mechanism is built based on the ADAMS software.By the comparing the result of the motion simulation with the mathematic model,the accuracy of the parametric model is verified.Then the mechanics analysis of the critical part of swing mechanism is carried out by using the dynamics analysis method,and the theoretical basis for designing the swing mechanism is provided.
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发布时间：2022-10-20 - 摘要：In order to solve the problems of the design and simulation analysis software portability and interoperability deficiencies of existing heavy engineering vehicle brake system,by using the Browser/Server and Client/Server hybrid structure,combined the JSP.Servlet technology and structural design,secondary development technology of finite element and numerical computing system,the heavy engineering vehicle braking system is built,the system has the modules of matching vehicle performance,wet brake structure parameter optimization,wet brake performance analysis and wet brakes isothermal design.The results show that heavy engineering vehicle brake system design methodology based on WEB technology has certainly feasibility,the method can simplify the braking system design costs,improve the design efficiency.
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发布时间：2022-10-20 - 摘要：Based on the penalty function method combined with the improved genetic algorithm,the multi-objective and multi-restriction reliability optimal design of the reducer with hardened tooth surface and modified helical cylinder gear is carried out.According to the properties of the constraint conditions,the different methods are used for effectively avoiding the local optimum problem.The accurate three-dimensional description of the involute gear is carried out by the establishment of the tooth profile curve coordinate equation of the involute gear.According to the interface technology of VB and SolidWorks,the three-dimensional parametric modeling of the involute gear is achieved based on the optimal design results.
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发布时间：2022-10-20 - 摘要：In order to solve the problems of traditional appearance of the disc brake,such as design conservative and poor timeliness,the disc brakes reliability calculation model based on variable uncertainty is established,and the brake temperature and braking distance of disc brakes are regarded as the restrictions of braking performance,finally the disc brakes design method based on varying uncertainty theory is got.The simulation results show that by redesigning calculated of disc brakes,the braking distance reliability and brake temperature reliability meet the reliability requirements;by redesigning the disc brakes on the finite element analysis,the redesigned model strength and temperature distribution meet the requirements.
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发布时间：2022-10-20 - 摘要：Analysis of the dynamic meshing force of face gear is the important content in the design of face gear drive with high quality.Based on the secondary development of CATIA and the principle of gear machining,the 3Dgeometric modeling of face gear for finite element analysis is obtained.Based on basic theory of contact dynamics,the reasonable finite element analysis model is built and the reasonable parameters are determined.The finite element simulation analysis and study of the dynamic meshing of face gear are carried out by using the ABAQUS,the variation law of the tooth surface contact force and the tooth root bending stress of face gear in the process of continuous mesh and the association law of the among the speed,load and tooth surface dynamic meshing are obtained.It will be provide some reference value for dynamic performance analysis of high-performance face gear drive.
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发布时间：2022-10-20 - 摘要：Taking apair of involute spur gear as the object of study,by using the formula of the friction coefficient obtained from the prophase study and the multi-bodied dynamics software ADAMS,it is possible to calculate the heat flow of friction at any point on the line of contact of driving gear and follower gear.The influence of rotate speed on gear temperature field is studied,by applying the ANSYS,the analysis of the steady temperature field of gear is carried out.The result shows that,in considering the friction coefficient of gears is changeable in different position of meshing,the analysis of gear temperature field distribution can be more accurate.The temperature field distribution on gear surface is related to the heat flow transmitted to gear surface and heat loss.The gear rotate speed is an important factor to influence gear temperature,the maximum temperature of the driving gear and the follower gear are directly proportional to the rotate speed.
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发布时间：2022-10-20 - 摘要：At present,the gearboxes are faced with the problems of high failure rate,large vibration and noise,short service life,etc,and the gear modification is an effective means to reduce vibration and noise,extend life,which is proved by practical experience at home and abroad for many years.With the introduction of some professional gear software or wind turbine analysis software from abroad,the work efficiency is greatly improved,and the extra cost due to experimental verification is also reduced.With the using of RomaxWIND excellent load distribution analysis function and on the basis of the theory of gear modification,the statics simulation analysis of the gearbox is carried out through the RomaxWIND software under the equivalent loads.According to the load distribution on the tooth surface of gear,transmission errors and other parameters,the length,amount and curve of modification of the high-speed gear is determined in the end.The conclusions can provide reference for gear modification.
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发布时间：2022-10-20 - 摘要：Several kind of motion composition mechanisms are discussed,which may be applied in the inner-linked transmission train based on the hybrid-drive.The epicyclic gear train with two degrees of freedom（DOF）has two motion inputs and one motion output is suitable for this motion composition mechanism.The 2K-H kind is most commonly-used epicyclic gear train with 2-DOF,due to its relatively simpler structure,and three common types of this 2K-H kind are selected to discuss their torque and power balance features.The conclusions are as follows,the NGW minus mechanism is able to meet performance requirements of the motion composition mechanism,the WW plus mechanism is able to meet performance requirements on certain conditions,the differential mechanism commonly used in hobbing machine usually do not meet the performance requirements.
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发布时间：2022-10-20 - 摘要：As the core component of automotive rear axle,the automotive main reducer undertake the function of slowdown and increase driving moment,its quality directly affects the safety and comfort of automotive.Taking the order analysis method as the core,the vibration signal analysis method of the automotive rear axle main reducer is designed based on the virtual instrument technology,the signal is collected by the data acquisition card and transmitted to the computer through the USB bus.The time point of vibration signal resampling is obtained through the processing of rotational speed signal,the order spectrum of the vibration signal is obtained by the frequency spectrum analysis of the vibration signal resampling,and the order spectrum is compared with the original vibration signal frequency spectrum,the clear frequency component is obtained,the problem of frequency alias produced by the speed fluctuation is solved.
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发布时间：2022-10-20 - 摘要：The drilling rig rotary table bevel gear is an important transmission device for the drive drilling rig.A precise parametric rotary table bevel gear model is established in Pro/E.By means of the data conversion to the interface file parasolid,a virtual prototype model of spiral bevel gear meshing transmission is created in ADAMS.The meshing impact forces of the straight bevel gear are simulated under tow different working conditions.Through analysis,agood coincidence between simulation results and theoretical calculation of the date verified that the virtual prototype model of bevel gears parametric modeling is reasonable and correct.The method provides a theoretical reference for the further discussion of bevel gear transmission system.The accurate simulation result also provides a reasonable guiding for the optimization design of high-power domestic rig rotary table.
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发布时间：2022-10-20 - 摘要：As a multi-linkage mechanism with multi-degree of freedom,the two-leg shield hydraulic support is comprised of beams,fore and rear links and hydraulic cylinders.It can realize supporting roof,protecting coal wall and moving forward under the function of hydraulic power,and plays an important role in coal mining.According to structure and operating characteristics of the two-leg shield hydraulic support,the geometrical relationship and calculations about rear link angle and shield beam angle for the supporting height,head distance,leg length and balance cylinder length are deduced.The differential equation of motion for the hydraulic support is established by the Lagrangian theory,and the support type of ZY17300/32/70 is calculated and analyzed.The relationship between angle displacement and velocity for the rear link angle and shield beam angle along with the motion characteristic of supporting height is obtained.The response characteristics of motion velocity and acceleration for top beam are discussed during the working process of lifting up and down.
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发布时间：2022-10-20 - 摘要：On the purpose of lightweight design,on the condition that it meets the strength and stiffness requirements the designer began to structural optimization of the planet carrier of speed-increase gearbox.First,the analysis of the strength and stiffness of planet carrier is carried out,and then the structure size which posts an important impact on planet carrier is decided as the design variable.Second,using high-end mesh morph software,the parameterized model of grid is established,and then go further,the optimized model of planet carrier on the purpose of decreasing its weight is built.Finally,the optimized analysis is carried out in combination of Isight multidisciplinary optimization software,the reasonable design plan for lightweight of planet carrier is obtained.The modal analysis towards the optimized planet carrier is carried out,and its natural frequency completely avoid meshing frequency,so as to avoid resonance phenomenon.
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发布时间：2022-10-20 - 摘要：Neglecting the clearance and friction in the kinematic pair,the rigid body dynamics analysis of bronzing machine pressure mechanism is carried out,the mathematical model is established.By using the Matlab,the dynamics procedure of mechanism is compiled and calculated,the simulation curve of the main component is drawn,the simulation curves of no-load and load of two conditions are compared,and the force analysis of the pressure mechanism is carried out.
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发布时间：2022-10-20 - 摘要：Taking the box of power take-off as the main research object,the box,gear,axis and other three-dimensional entity model are created by using the CAD software UG,and the models are inputted into ANSYS Workbench through the data exchange interface and respectively taken statics analysis and dynamics analysis of the box to obtain the box stress distribution.Then,it provides theoretical basis for accurate structure strength analysis and reliable optimizing design of the box through comparing different analysis results.
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发布时间：2022-10-20 - 摘要：Based on the working modes of the transmission system of range-extended electric vehicle,the map of internal combustion engine and battery system characters are obtained through calculation,the main components of transmission are set up in Matlab on the basis of dynamics equation,and the model is analyzed,the genetic algorithm is combined into control strategy in order to optimize the start-close area of range extended system.The simulation results show that the optimized strategy can not only improve the fluctuation range of SOC,but also improve the fuel consumption of transmission system.
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发布时间：2022-10-20 - 摘要：To further shorten the product development cycle of dump truck driving axle housing and improve the production efficiency,a dump truck drivngaxle design method is presented based on the practical road test parameter and the ADAMS and AWB common used in finite element analysis,the law of the axle housing stress and strain conditions under the practical road test parameter is studied,and the influence law of the frequency of load and size of load on the axle housing life is analyzed.The results show that dump truck driven axle housing larger stress area concentrated on the right and left axle and wheel connection area,the dump truck driven axle fatigue life cycles and damage factor minimum are in axle housing wheel area,the influence of load amplitude changes on the life of the axle housing is small,the influence of load frequency change on the axle fatigue life.
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发布时间：2022-10-20 - 摘要：The finite element model of the V-belt transmission system is established,and the friction and contact characteristic of the V-belt transmission system under the condition of different angular velocity,friction coefficient is analyzed,the effect of frictional contact characteristics of the V-belt transmission system under the condition of different angular velocity,friction coefficient is studied.The results show that with angular velocity increasing,the contact force between the belt and pulley decreases;with contact degree increasing,the contact force between the belt and pulley increased;with friction factor increasing,the friction angle of the contact point decreases;with contact degree increasing,the friction angle of the contact point increased,and reached the maximum at the contact point out;from outer to inner,the belt and pulley contact stress and friction angle are different in different node along the radial direction,but both trends are basically identical.
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发布时间：2022-10-20 - 摘要：Using bushings with great stiffness coefficient to replace the rigid constraints,the dynamics simulation of the over-constrained spatial RCCR mechanism with three pairs of force transmitting rods under conditions approaching rigidity is achieved.The simulation experiment targeting different structural parameters and resistance moment,the variation discipline of transmitted force is obtained,the cosine function type of constraint component Fz is fitted out,the estimation formula of Fz amplitude is summed.
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发布时间：2022-10-20 - 摘要：To solve the problem of single machine digital machining for spiral bevel gear,a digital machining scheme of spiral bevel gear based on network is proposed.The communication control model of the digital machining of spiral bevel gear is built,the communication control software is developed,and the network communication architecture of digital machining of spiral bevel gear is set up.Finally,the feasibility and practicability of the proposed machining scheme are proved by the digital machining application test based on network of one hypoid gear.
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发布时间：2022-10-20 - 摘要：Several kinds of practical mixed chains is analyzed and synthesized based on using POC set theory,the stiffness and accuracy between mixed chain and simple branched chain are analyzed.At last,8kinds of weak coupling three translation mechanisms are given,and their assembly conditions,active pairs and coupling degrees are given.The analysis shows that,compared with the simple branched chains,mixed chains are greatly improved in stiffness and accuracy,the two branched selfreconstruction mechanisms have the advantages of good stability,high precision and simple domination.
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发布时间：2022-10-20 - 摘要：The lever method and the planetary gear mechanism of automatic transmission are studied.A new four planetary gear mechanism which is a hybrid institutions concatenated a Ravigneaux mechanism with a Simpson mechanism is constructed.Based on the lever method,its driving route is also analyzed.Seven types of driving ways which can meet with the shifting requirements of the automatic transmission are obtained.Five types of driving ways among them can be used for 9forward gears,and the other two can be applied for 10 forward gears.Therefore,it provides a theoretical reference to develop the multiple-speed transmission system.
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发布时间：2022-10-20 - 摘要：Through the analysis of the meshing principle of globoidal indexing cam,combining with the structure characteristics of the five axis NC machine,the cutter location control equation of the equivalent machining of globoidal indexing cam on five-axis NC machine is deduced by the method of coordinate transformation.On the basis of this,the offset direction and size of offset of cutter location compensation method is deduced according to the principle of midpoint offset,and finally the five coordinates cutter location control equation in non-equant machining of globoidal indexing cam is deduced.It can be programmed to calculate the machining data of the cam,and the non-equant machining of globoidal indexing cam by using five-axis NC machine is realized.
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发布时间：2022-10-20 - 摘要：The design,manufacturing and the research and development of high parameter gearbox for generating electricity by utilizing the abandoned residual heat and pressure,residual gas resources of industrial production.
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发布时间：2022-10-20 - 摘要：The power coupling system is the key component of the parallel hybrid vehicle and the combined hybrid vehicle,its performance directly affects the dynamic performance and fuel economy of the hybrid vehicle.The function and the classification of power coupling system are introduced.From the aspects of the technological developing process,the structure,the operational principles,and performance characteristics,etc,three type power coupling systems（gear type mechanical power coupling system,electromagnetic power coupling system and hydraulic power coupling system）are described in details.In the end,the trend in development of the power coupling system for hybrid vehicle is forecasted preliminarily,the control of power coupling system will be more intelligent,will achieve higher integration with the other system on the hybrid vehicle,and its structure will be more diversified.
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发布时间：2022-10-20 - 摘要：First of all,the four modes of common motion,named serpentine locomotion,traveling wave motion,sideway motion and helical motion are analyzed.Then,for the connection mode of the joint of snake like robot,the characteristics and application range of the mature parallel connection,orthogonal connection,universal joint connection and P-R connection are compared and analyzed.Finally,the future development trend of the connection modes of the snake like robot is given.
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发布时间：2022-10-20 - 摘要：<正>重庆机床（集团）有限责任公司（以下简称重庆机床集团）成立于1940年,先后试制成功中国第一台滚齿机、剃齿机、插齿机、蜗轮母机等制齿机床,是中国制齿设备诞生的摇篮。目前,重庆机床集团拥有加工直径Φ10mm-3200mm,数控轴一轴至九轴9个系列90余种制齿机床,广泛应用于汽车、工程机械、船舶、能源矿山、航空航天等行业,国内市场占
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发布时间：2022-10-20
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