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1 motion checking
In general layout design, motion check includes two aspects: the vehicle angle from the kinematic checking correctness; For the relatively moving parts or parts for movement interference checking. Related to the above-mentioned checking whether the car is working properly, we must pay attention.
Since the assembly is composed of many cars are assembled together, the overall perspective of the designer should consider the vehicle, the movement completion checking the correctness of the overall arrangement and structure characteristics of each cartridge. The front of the engine, due to use of different two-axis or the intermediate shaft of the transmission, the rotating direction of the output shaft of the transmission are different, which affects the structure of the main reducer, kinematics must be checked to ensure there is a sufficient number of forward gears. Another example is the direction of rotation of the steering wheel must be kept consistent with the direction of rotation of the steering wheel, for rotating the screw to deal with the position of the rocker arm, and the like constituting the steering transmission mechanism kinematics be checked correctness.
Since the wheel runout, front wheel steering and other reasons causing relative motion between the motion of parts and components, and possible interference caused by design errors motion. Where there is relative motion should be carried out on the principle of movement interference checking. Checking steering gear and suspension movement: when the steering wheel for runout FIG determining hop and the steering wheel to the steering limit position occupied space, and accordingly determines the opening shape of the fender, the shape of the wheel cover, the damper is the maximum tensile and compressive length while checking the steering wheel and the gap between the trailing arm, frame and other adequacy; the suspension runout, for beat FIG shaft, the drive shaft is determined, the lower limit of beating and the maximum swing angle of the drive shaft and the beam to check the gap, and the variation of the length of the shaft; rear axle when the left and right wheels at the limit position of the height difference, decided truck wagon and the rear fender floor height positions, checking the gap between the rear leaf spring U-bolt and the frame. For special vehicles, often determine what structural features according to different check, such as a tractor and trailer when the gap between the check steering movement, the front plate and the rear trailer wagons Wai cab.