Patent ID: 8567277

Claim:
A transmission device comprising: a gear case defining a threaded hole; a first gear comprising a shaft and received in the gear case, the shaft defining a receiving hole in an end surface thereof; a second gear received in the gear case and meshed with the first gear; and a backlash adjusting mechanism comprising a resilient member and a fastening member, wherein both of the first gear and the second gear are a plurality of bevel gears, the fastening member is adjustably engaged in the threaded hole of the gear case, opposite ends of the resilient member are respectively received in the threaded hole and the receiving hole, and resist the fastening member and an end of the shaft of the first gear, respectively, an elastic variation of the resilient member is adjusted by the fastening member, such that a backlash between the first gear and the second gear is adjusted via the resilient member.