Planetary gearbox double-sided battlefield: industrial robot joints
Release Time :
2025-04-18
Source :
network
Author:
Yongkun Motor
Planetary gearbox double-sided battlefield: industrial robot joints
1. Micron level positioning accuracy: the "surgical knife" of the robotic arm

Technical requirements: Repeat positioning error ≤ 0.05mm, backlash control ≤ 3 arc minutes
Implementation path:
Adopting a helical planetary gear design, stress is dispersed through multi tooth meshing (such as the three-stage planetary carrier structure of the Vamat FE series planetary gearbox)
Cooperate with pre tightening force adjustment technology to eliminate gear clearance
Case: A certain automobile welding assembly line uses planetary reducers to achieve 3000 welding points per vehicle with an error of<0.03mm, and the welding qualification rate is increased to 99.97%
2. Instantaneous impact resistance: a "steel joint" that can withstand 300% overload
Technical requirements: Instantaneous overload capacity ≥ 300% rated torque, impact resistance life>20000 hours
Material breakthrough:
Gear surface carburizing and quenching treatment (hardness reaches HRC60-62)
The planetary carrier is forged from 40CrNiMoA alloy steel (tensile strength ≥ 980MPa)
Actual test data: After 100000 consecutive 5-ton impact tests, the gear wear of a certain stamping robot joint was less than 8 μ m
3. Compact structural design: creating miracles in every inch
Space challenge: The axial length of the joint needs to be compressed to within 1.5 times the diameter of the motor
Innovative solution:
Integrated planetary carrier design (such as the gearbox and internal ring gear integration scheme of SPB series reducers)
Adopting thin-walled cross roller bearings, the radial size is reduced by 30%
Application example: A certain electronic assembly robot uses a compact reducer to reduce the thickness of the joint module from 120mm to 85mm, achieving precision assembly in a small space
4. Thermal stability: Consistent performance in environments ranging from -40 ℃ to 120 ℃
Temperature control requirement: accuracy fluctuation<0.01mm/℃
Technical solution:
Thermal symmetric structure design (such as the dual cycle oil circuit heat dissipation system of the Vamat FE series)
Using high-temperature lubricating grease (temperature resistance range -50 ℃~150 ℃)
Extreme test: Running continuously for 8 hours in the Northeast Extreme Cold Workshop (-35 ℃), the positioning error only increased by 0.007mm
5. Maintenance free long life: commitment to 20000 hours of trouble free operation
Life indicator: rated life ≥ 20000 hours, maintenance cycle>4000 hours
Longevity password:
The planetary gear set adopts a modified tooth profile (reducing contact stress by 20%)
Fully sealed protection design (IP67 dustproof and waterproof)
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