Heat dissipation device and torque sensor

The invention relates to a heat dissipation device and a torque sensor. The heat dissipation device comprises an outer shell, a coupler, a planet wheel transmission mechanism and a heat dissipation mechanism. The planet wheel transmission mechanism comprises an inner gear ring, an outer gear ring and a planet carrier, the planet carrier is arranged on the coupler in a floating mode, a planet wheel is arranged on the planet carrier, the inner gear ring is fixedly arranged on the inner wall of the outer shell, the outer gear ring is fixedly arranged at one end of the coupler, the planet wheel is meshed with the inner gear ring and the outer gear ring, and the heat dissipation mechanism is arranged on the planet wheel. In actual use, a power source of a heat dissipation device does not need to be additionally arranged, rotation generated when the coupler transmits torque is directly utilized to drive the planet wheel transmission mechanism, then the heat dissipation mechanism located on the planet wheel transmis