Automobile seat reinforced sliding rail

An automobile seat reinforced sliding rail, comprising:

• a lower sliding rail, which is used for fixing to an automobile bottom plate and has an inner cavity that extends in a length direction, and an upper end of the inner cavity having a yielding opening;
• an upper sliding rail, which is forward-backward slidably mounted in the inner cavity, a lower end of the upper sliding rail having a mounting slot that extends in a length direction thereof, and an upper end of the mounting slot having a mounting opening;
• a mounting support, which is fixedly mounted at a position of the mounting slot that corresponds to the mounting opening, the mounting support comprising a horizontal support plate and two vertical plates that extend upward from two ends of the horizontal support plate, two sides of the two vertical plates both having a protruding part that extends outward, side walls of two sides of the mounting slot having a support hole, and the protruding part being supported in the support hole;
• a leadscrew, both ends of which are fixedly mounted at a front end and a back end of the inner cavity by a support base, the support base having a threaded hole that matches the leadscrew, and an end part of the leadscrew being screwed into the threaded hole;
• and a gearbox, which is fixedly mounted on the mounting support and cooperates in threaded transmission with the leadscrew.