Taper straight tooth planetary reducer

A taper straight tooth planetary reducer comprises a center wheel, a planet wheel, a planet carrier and a gear ring, the center wheel is arranged at the axis position of the gear ring, the planet wheel is meshed between the center wheel and the gear ring, the planet wheel is connected with the planet carrier through a pin shaft, and the planet carrier is coaxially arranged in the gear ring in a sleeved mode through a bearing. The center wheel, the planet wheel and the gear ring are taper straight gears with consistent modulus, taper angle and tooth thickness variation, the left end of the center wheel is a large end, the right end of the center wheel is a small end, the left ends of the planet wheel and the gear ring are small ends, and the right ends of the planet wheel and the gear ring are large ends; the tooth thickness of the center wheel and the tooth ring is gradually reduced, and the tooth thickness of the planet wheel is gradually increased; the planet wheel can move left and right along the axis of