Planet car wheel testing device

The invention relates to a planet car wheel testing device and belongs to the field of car wheel testing. The planet car wheel testing device solves the problem that by means of an existing planet car wheel testing device, wheel pressure is regulated through a balancing weight so that in terms of wheels with large wheel pressure, a test is difficult to perform because a lager balancing weight causes excessive system inertia. The planet car wheel testing device comprises a support frame, a wheel frame, a loading mechanism, a trolley, a speed measuring and driving mechanism and a driven belt wheel mechanism. A loading handle is connected with an input end of a worm and gear reduction gearbox. An output end of the worm and gear reduction gearbox is respectively connected with one end of each of two springs. Two first fixation rods are fixedly arranged below the other end of each of the two springs respectively. One end of each of four horizontal rods is respectively hinged with an upper end and a lower end of each of two first fixation rods in a hinged mode. The other end of each of the four horizontal rods is respectively hinged with an upper end and a lower end of each of two second fixation rods. The planet car wheel testing device is used for testing performance of planet car wheels.