Development Of Universal Chassis For Garlic Working Machines

As an important part of working machinery,garlic working machinery’s chassis is the basis to complete the corresponding functions such as garlic sowing,plant protection,harvesting and other operations.Traditional agricultural machinery chassis hasn’t been able to meet garlic’s diverse needs of actual production in basic functions and versatility.At the same time,the construction way of garlic working machinery,which is one chassis serves to one working device,increases the R&D cycle of enterprises,manufacturing cost and farmers’ purchasing cost.In order to meet the diversified demands of garlic operation and reduce the cost,this paper has designed a new kind of general chassis which has relatively simple structure,strong universality,and general chassis with many functions such as walking,steering,braking,etc.The new general chassis can meet the usage of different garlic operation machinery.The main research content of the paper is as follows:The division calculation of functional modules of the general chassis is completed at first.The function units are divided by analysis of the chassis function.The module division and determination of the overall chassis plan is done by weight analysis and calculation on the divided functional units through module’s relevance calculation.Design and calculation of each module have also completed.The power source module in the general chassis of garlic machinery is calculated to realize engine selection.The design of the driving module is completed by the design and calculation of clutch and gearbox in the driving module.The design of the power output module is complete by calculating and selecting of the transfer box according to the speed required by different functions and calculating of the transmission ratio of sprocket wheel in the driving module.The frame and the universal interface of the load-bearing module is designed in the paper.The design of motion stability control module is completed by doing working force analysis when it works and doing hydraulic cylinder selection calculation according to the force situation.The frame and general interface have being optimized by ANSYS simulation software.Full load bending condition,full load torsion condition and emergency braking condition are selected as chassis’ three working processes.Chassis’ strength and stiffness under these three working conditions are analyzed to see whether they will meet the design requirements or not.At the same time,static analysis is done by choosing common interfaces of harvest unit with the most complex force and power output module with relatively simple force to verify the performance of the universal structure.Tests on the kinetic stability which affects the chassis’ working performance have also conducted in the paper.The order of influencing factors of the chassis kinetic stability is analyzed through the practical test.Then,the influence rule of each influencing factor on the chassis motion stability is analyzed through the simulation experiment,which can provide the basis for the subsequent design.