Telescopic mechanical device and inspection robot

The utility model relates to the technical field of robots, and particularly discloses a telescopic mechanical device and an inspection robot. The telescopic mechanical device is used for prolonging the stroke of mechanical movement and comprises a first support assembly, a second support assembly, a driving assembly, a transmission assembly connected with the second support assembly, a lever assembly and a bearing assembly. The lever assembly comprises a pulley and a synchronous belt, the pulley is installed on the second support assembly, and the synchronous belt is connected to the pulley in a bridging mode and connected with the first support assembly and the bearing assembly. The driving assembly is used for driving the transmission assembly to drive the second support assembly to do reciprocating motion along a first track, the second support assembly drives the lever assembly to do synchronous motion, and therefore the lever assembly drives the bearing assembly to do reciprocating motion along a second