Saddle problem of tractor
Double pendulum refers to the bearing can longitudinal oscillation and transverse swing angle is less than or equal to 5. Double pendulum is suitable for vehicles with poor road condition and side overturning.
The 90 type traction seats have simple pendulum type and double pendulum type. A simple pendulum means that the support can only swing longitudinally, with a swing angle of 15 degrees.
One way can only rotate horizontally; the two directions are that the support of the traction seat can rotate in both longitudinal and horizontal directions; when the automobile is turned, the saddle can roll over, so that the steering can be turned easily.