Horizontal open and folding changeable room type automatic carriage

The utility model relates to a horizontal open and folding changeable room type automatic carriage used for vehicles in field military engineering operation and in life. A bottom frame of the carriage is provided with a square tubular fixed cross beam. The outer end of the fixed cross beam is provided with a supporting wheel. Two telescopic cross beams are sheathed in the fixed cross beam, and the shape of each telescopic cross beam is the same as the fixed cross beam. Rollers are arranged in each telescopic cross beam. The bottom of the telescopic cross beam is fixed with a rack bar holder and a rack bar. The rack bar meshes with a gear arranged on a drive shaft. The number of movable carriages is two. The movable carriages have the same shapes, and are respectively sheathed in a fixed carriage. The outer end of the bottom plate of each movable carriage is fixed with the outer end of each telescopic cross beam. The inner end of each movable carriage is provided with a pulley. Both sides of the bottom frame of the carriage under the fixed cross beam are respectively provided with a drive shaft and a motor decelerator. A chain wheel of the drive shaft is arranged on each drive shaft. The chain wheel forms a drive connection with a chain wheel of a decelerator on an output shaft of the motor decelerator. The utility model is suitable for training and exercise for a field army, and operation and life during battles. The utility model is also suitable to be used for flow operations and life for field construction units, such as exploration, construction, etc.