The reducer is one of the key components in automobiles, mainly used to reduce speed, transmit power, and increase torque. Most gear transmission products will experience slight fatigue cracks and wear on the surface of their tooth surfaces during long-term operation, resulting in pitting corrosion. Initial pitting can reduce the load-bearing area of the tooth surface, causing impact and noise. However, destructive pitting and surface peeling, once they occur and expand, may lead to tooth surface damage, unstable gear operation, intensified vibration of the reducer, and increased transmission noise. When the damage reaches a certain level, it may lead to gear breakage, especially critical gear damage, which can cause serious consequences such as damage to the entire transmission system or mechanical components.

Today we will take you to learn about:

Torsion fatigue test of reducer

Figure 1: Vehicle Position Map

Figure 2. Schematic diagram of the reducer assembly structure

01 Test Purpose

Correctly determine the type and performance indicators of damage, analyze the causes, and take effective preventive measures to improve product quality and increase service life and safety factor. 

Composition of 02 Reducer Torsion Fatigue Test Bench

Experimental overview: Connect the two output ends of the reducer to the loading equipment through the driving half shaft, and connect the input end to the fixture or fixed source, without allowing rotation; Control the loading equipment through the testing system to ensure that the two output terminals are synchronously loaded to the specified number of cycles according to the specified torque value, loading frequency (non torsion equipment needs to increase the force arm simulation conversion).

03 Gearbox Torsion Fatigue Test Bench Performance

04 Reference standard

QC/T 568.1-2011 Bench Test Method for Automotive Mechanical Transmission Assembly Part 1: Micro

QC/T 1022-2015 Technical Conditions for Reducer Assembly for Pure Electric Passenger Cars

QC/T 29063.1-2011 Technical Conditions for Automotive Mechanical Transmission Assembly Part 1: Micro