Transmission device with adjustable center distance from input shaft to output shaft

The invention relates to a transmission device with an adjustable center distance from an input shaft to an output shaft. The distance adjusting transmission device arranged inside a supporting body adopts the scheme that a driving gear and a driven gear are fixed on transmission shafts through flat keys; one of the transmission shafts is mounted in a fixed point of the supporting body through a self-aligning roller bearing, and the other transmission shaft is supported in a bearing support sliding inside a track groove of the supporting body through another self-aligning roller bearing; a floating idle gear is mounted on a mandrel through the self-aligning roller bearings; transparent caps are arranged on the two outer sides of the self-aligning roller bearings; fixed distance connecting rod supports are arranged on the two sides of each of the driving gear and the driven gear; a shaft sleeve is arranged on each of the transmission shafts on the two sides of the driving gear and the driven gear; one end of each fixed distance connecting rod support is mounted on each shaft sleeve through a deep-groove ball bearing; pressure plates are arranged on the two outer sides of the self-aligning roller bearings; the other end of each fixed distance connecting rod support is mounted on the mandrel on the outer side of each transparent cap in a sleeving manner, or is mounted on the central shaft neck of the floating idle gear on the inner side of each transparent cap in a sleeving manner; a shaft end baffle is equipped on the end face of the mandrel; the driving gear and the driven gear are normally meshed with the floating idle gear through the fixed distance connecting rod supports on the two sides respectively.