Development Of The Supporting Device Of A Heavy-duty Recovery Vehicle

With the progress of science and technology and the demand of national defense modernization,ground combat equipment is developing towards the direction of heavy,automatic,precise and systematic.Battlefield rescue equipment is the key to ensure the first rescue of war loss(fault)equipment,and to quickly recover the mobility and combat capability,while the multi-function heavy rescue vehicle is a weak link in China’s modern national defense equipment system.The towing mechanism is a key functional part of the rescue vehicle,which needs to carry and pull the rescue object to the designated maintenance support site.In this paper,aiming at the design requirements of a field rescue vehicle,the structural design,mechanical analysis and experimental verification of the towing mechanism of the heavy rescue vehicle are mainly carried out.A folding multi-function towing device scheme is proposed.According to the overall design scheme and parameter requirements of the towing device of a rescue vehicle,the mechanical structure of the towing device is designed in detail,and the driving hydraulic cylinder of the towing device is designed and calculated.The prototype system of the vehicle is built to carry out physical test.The mechanical model of towing device under the brace condition is established.The influence of longitudinal force and transverse force on the calculation of axial load is ignored,and the local deformation under the binding condition is ignored,and only the influence of vertical force transferred from the rescued object to the brace device on the system is considered,At the same time,the distribution of axle load of the rescue vehicle is also related to the service performance of the rescue vehicle,the safety of off-road road driving.In this paper,the structure of multi-axle heavy truck is studied,the force under the support condition is analyzed,and the calculation and distribution of the axle load for the rescue wheel equipment under the support condition of 56 tons are carried out,so that the design index of each axle load of the rescue vehicle is not more than 13 tons.The mechanical calculation and check of the key parts under various working conditions of the plate’s feedback were carried out,and the finite element analysis of the main structural parts was carried out.Under the condition of flat plate rearward feeding,the supporting device should simultaneously bear the load of the rescued object and the axle load of the front axle,as well as the load under various complicated conditions during driving.The results of mechanical calculation and finite element analysis are within the scope of design and meet the requirements of design indicators.Holding device before delivery to fold,walk,stretch,such as fixed test,analysis,summary of test results is performed at the same time need to analyze the test site problems,processing,so as to improve the safety and reliability of the vehicle,and holding device simulation results of actual test,inspection led device performance under actual working condition.