Design and Analysis of Lifting Pusher Drop Axle for Heavy Commercial Vehicle

Paper #:
  • 2017-01-9176

  • 2017-04-11
Lifting axles are auxiliary axles that provide increased load carrying capacity in heavy commercial vehicles. Lift axles give better fuel efficiency as well as reduced operational costs by means of increasing the load carrying capacity. These axles are raised when the vehicle is in unloaded condition, thus increasing the traction on remaining wheels and reducing the tire wear which in turn reduces the maintenance cost of the vehicle. Lifting height and force required to lift the whole mechanism are two main considerable factors to design the lifting axle mechanism. Current lifting mechanism in India has single tire with continuous axle. To maintain the draft angle of propeller shaft, continuous axle is unable to lift more after certain height and because of single tire, mechanism has less load carrying capacity up to 6T (Tons) and more tire wear found at turning time. Multi-axle vehicles have ‘pusher’ axle that is present in front of the drive tandem axle, which gives additional load carrying capacity for these vehicles. Installing a lifting mechanism in the pusher axle with dual tire and centralized drop axle instead of the continuous axle with using air spring bellows can improve the lifting height without affecting the propeller shaft during the lifting time. Kinematics of lifting mechanism is designed as to decrease the lifting force with increase in load carrying capacity of the axle and decrease in packaging value. Dual tire causes less reaction between road and tire due to which tire wear will less. This paper is a study about the whole kinematics; analytical design and analysis of lifting mechanism having 10T dual tire drop axle.
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