Determination of tilt system parameters engine-transmission unit

The article deals with some issues of designing a machine designed to work in mountainous conditions. It is known that for the normal operation of the internal combustion engine, its horizontal position is necessary, and for the psychologically confident operation of the machine operator, its body must be in a vertical position. The fulfillment of these conditions is ensured in the machine according to the Russian patent No. 2059502. In this machine, a motor transmission unit of a wheeled vehicle is installed on a caterpillar chassis, which includes an engine, a power transmission and a driver's cab. The motor-transmission unit is connected to the caterpillar bogie by bearing assemblies mounted on the output shafts of the motor-transmission unit, and by a hydraulic cylinder, which ensures the rotation of the motor-transmission unit relative to the caterpillar bogie for the horizontal position of the internal combustion engine and the vertical position of the operator. When designing such a machine, the question arises about the coordinates of these points and the parameters of the hydraulic cylinder. To solve this issue, the article presents a projection diagram of the bearing assembly of the motor-transmission unit and the points of attachment of the hydraulic cylinder to the motor-transmission unit and to the frame of the caterpillar bogie on a vertical longitudinal plane passing through the machine. The analysis of the presented scheme made it possible to obtain an equation that determines the coordinates of the hydraulic cylinder attachment points relative to the bearing assembly and the length of the hydraulic cylinder, depending on the specified values of the tilt angles of the motor-transmission unit. The force of the hydraulic cylinder is determined to create a torque relative to the bearing assembly, which should not be less than the total torque, including the torque from the weight of the motor-transmission unit and the reactive torque on the motor-transmission unit, determined by the torque on the output shafts of the motor transmission unit block when the internal combustion engine is running.

1. Kholopov V. N., Labzin V. A. Gornaya dvukhgusenichnaya mashina. Patent Rossii № 2059502, opubl. 10.05.1996. Zayavka 93036810/11 ot 10.07.1993.

2. Spravochnik mashinostroitelya. M. : Mashgiz, 1960. T. 1.