Lifter design of mulifunctional asphalt pavement road maintenance truck for Qinghai-Tibet aera

According to the fast maintenance requirement of asphalt pavement and the constrained application of large scale maintenance truck in Qinghai-Tibet area,a small scale multifunctional road maintenance truck was designed to solve the problems and to improve the quality and efficiency of maintenance road. On the analysis of secondary level road requirement,cold patch asphalt mixture was chosen as the maintenance material. Based on the platform of DF140 vehicle,multifunctional road maintenance truck was designed with the function of asphalt pavement cutting,crushing,seamclearing,compacting,cold patch heating and tools lifting up and down. In order to solve the fast tool lifting problem,four lifting means with 700 mm safety gap were compared and electric hoist with side lift method was used to design the lifter. With the maximum lifting weigh of 300 kg,the stability and structure stress of the lifter were analyzed. The results indicated that the ratio of anti-tilting torque and tilting torque is 16 and the maximum displacement is 1. 98 mm. The lifter has high antioverturning stability,high structural strength and rigidity,and is suitable for application in maintenance truck. The development of small scale multifunctional road maintenance truck solves the problems of fast maintenace requirement in high altitude with seansonal frost environment area and is of great significance to improve the worker's condition and improve maintenance efficiency.