Four-connecting-rod front wheel turning mechanism

A four-connecting-rod front wheel turning mechanism comprises a turning actuator (1), a driving rocker arm (2), a spline shaft (3), a swing rocker arm (4) and a pull rod (5), one end of the turning actuator (1) is connected with a supporting column outer cylinder, the other end of the turning actuator (1) is connected with one end of the driving rocker arm (2), the other end of the driving rocker arm (2) is installed on the upper portion of the spline shaft (3), and the lower portion of the spline shaft (3) is installed on the swing rocker arm (4). And the swinging rocker arm (4) is connected with the pull rod (5). The turning function of the nose landing gear can be achieved, the driving rocker arm, the spline shaft, the swing rocker arm and the pull rod are driven in a telescopic mode through the turning actuator, a large arm of force can be kept in the period, and therefore the requirement for the actuator cylinder is not high; meanwhile, the rotating angle of the mechanism is larger, and the maximum swing