Roller conveying racks with quickly adjustable width

A roller conveying rack, comprising two carrier plates being rectangular,

• wherein the two carrier plates are arranged in parallel and aligned, legs are disposed on both sides of a bottom of each of the carrier plates in a longitudinal direction of the carrier plate, the legs on different ones of the carrier plates are connected by first sleeve shafts and each of the first sleeve shafts is broken in a middle portion,
• rolling sleeves are arranged between upper portions of the two carrier plates in the longitudinal direction of the carrier plates and each of the plurality of rolling sleeves is broken in a middle portion,
• first movable shafts are disposed at the broken middle portion of the first sleeve shafts and connecting shafts are disposed at the broken middle portion of the rolling sleeves,
• both end portions of each of the first movable shafts are provided with limiting plates and are inserted into a respective one of the first sleeve shafts, and both end portions of each of the connecting shafts are inserted into a respective one of the rolling sleeves,
• through-notches are formed within the first sleeve shafts, and blocking rings are provided at edges of the first sleeve shafts at the broken middle portion and at edges of the rolling sleeves at the broken middle portion,
• both end portions of each of the rolling sleeves are provided with rotating shafts,
• each of the rotating shafts is sleeved with a bearing fixed onto a respective one of the carrier plates, and servo motors for driving the rotating shafts to rotate are provided in the carrier plates, and
• a plurality of insertion holes are provided on each of the first sleeve shafts between the legs and a plurality of threaded holes are provided on each of the first movable shafts between the legs, and each of the insertion holes is connected to a respective one of the threaded holes by a bolt.