Servo reducer

A servo reducer, comprising:

• a motor gear;
• a support structure;
• a first-stage gear set;
• a first-stage shaft;
• a second-stage gear set;
• a second-stage shaft;
• a third-stage gear set;
• a third-stage shaft;
• and
• an output gear;
• wherein the motor gear is connected to a driving motor;
• wherein the first-stage shaft, the second-stage shaft, and the third-stage shaft are mounted on the support structure, the first-stage gear set is mounted on the first-stage shaft and is meshed with the motor gear, the second-stage gear set is mounted on the second-stage shaft and is meshed with the first-stage gear set, the third-stage gear set is mounted on the third-stage shaft and is meshed with the second-stage gear set, and the output gear is meshed with the third-stage gear set;
• wherein the third-stage gear set comprises a third-stage plate gear, a third-stage shaft gear, a baffle ring, a clutch spring, and an adjusting spring;
• wherein the third-stage plate gear is meshed with the second-stage gear set, first teeth are disposed on a bottom portion of the third-stage plate gear, a tooth thickness the third-stage shaft gear extends in an axial direction of the third-stage shaft and defines a first taper angle, the third-stage shaft gear is engaged with the output gear, second teeth are disposed on a top portion of the third-stage shaft gear, and the second teeth are meshed with the first teeth in the axial direction of the third-stage shaft;
• wherein the baffle ring is sleeved and fixed on the third-stage shaft and is located on one side of the third-stage plate gear away from the third-stage shaft gear, the clutch spring is sleeved on the third-stage shaft, a first end of the clutch spring is fixedly connected to the third-stage plate gear, a second end of the clutch spring is fixedly connected to the baffle ring to apply an elastic force enabling the second teeth being meshed with the first teeth, the adjusting spring is sleeved on the third-stage shaft, a first end of the adjusting spring is connected to the baffle ring, and a second end of the adjusting spring is connected to the support structure to apply an elastic force enabling the output gear being meshed with the third-stage shaft gear.