Four-person snowmobile chassis and sleigh car

The invention particularly relates to a four-person snow car chassis and a sleigh car. The chassis comprises ice skates, a steering system, a car frame and a braking system. The frame comprises a front frame and a rear frame, the front frame and the rear frame are connected through a shaft rod and a frame longitudinal beam, and the front frame and the rear frame can rotate relative to the whole vehicle X axis; the steering system is fixedly connected to the front frame; the steering system comprises a sleeve, a bearing, a pressing ring, a steering pull rod, a ball head, a ball head mounting seat and a T-shaped steering frame; the casing pipe is fixedly connected to the middle of the front frame, the bearing is fixedly connected into the casing pipe through the pressing ring, the bottom edge of the T-shaped bogie is cylindrical and is inserted into an inner ring of the bearing, and the two edges of the upper portion of the T-shaped bogie are each provided with a ball head installation seat which is connected w