LNZP-2000 Wheel Torsional Fatigue Tester: The Core Equipment for Fatigue Performance Testing of Motorcycle Hub

As a key safety component of the whole vehicle running system, the anti-torsion fatigue performance of motorcycle hub is directly related to the safety of vehicle running. During the running of the vehicle, the wheel hub continues to bear complex alternating torsional load, and it is prone to cracks, fractures, plastic deformation and other failures after long-term repeated stress. LNZP-2000 wheel torsional fatigue testing machine is specially developed for alloy spoke wheel hub of motorcycle and moped, which can accurately complete the torsional fatigue durability test of wheel hub, provide scientific and reliable test basis for product development iteration, sample verification and factory quality control, and is widely used in wheel manufacturing enterprises, third-party testing institutions and scientific research laboratories.
The equipment is tested in strict compliance with a number of industry and national standards, including GB/T 38183 2019 "spoke wheel for motorcycles and mopeds", QC/T 211 1996 "Test method for light alloy wheels for motorcycles and mopeds" and GB/T 2611 2022 "General technical requirements for testing machines". The test flow, data acquisition and judgment logic all meet the requirements of the specifications, ensuring the compliance and credibility of the test results.
The whole testing machine is divided into three core parts: main machine, loading fixture and microcomputer measurement and control system. It is equipped with servo electric actuator, torque sensor, force sensor, hub quick clamping mechanism and displacement adjustment mechanism. The loading unit of the main engine relies on the servo electric actuator matched with the transmission screw module, and the reciprocating motion of the actuator outputs the alternating torsional moment through the force arm conversion, and relies on the closed-loop feedback to accurately control the torque, loading frequency and stroke parameters. The loading frame fixture is equipped with a special fixing fixture for the wheel hub, a force arm assembly and a longitudinal adjustment base, which can be adjusted longitudinally and is suitable for 8-22 inch alloy spoke wheel hub; The fixed length of the test arm is 700±0.5mm, which converts the linear force output by the actuator into the torsional moment of the wheel axis position. The fixture structure ensures the coaxiality of the wheel hub installation and reduces the test deviation caused by the installation error. Microcomputer measurement and control system takes industrial computer as the core, and is equipped with acquisition module and special test software, which can collect torque, test force and cycle times in real time, and freely set test torque, loading frequency and total cycle times. When the wheel hub is cracked or broken, which causes sudden torque change, the equipment can automatically stop, completely store all test data, and support data consulting, curve viewing and test report export.
The working logic of the equipment fits the actual working condition of the wheel: the wheel hub to be tested is firmly clamped in the fixture, the servo actuator pushes and pulls back and forth according to the set frequency, and the alternating torsional load is applied to the wheel through the standard arm; Various sensors continuously collect torque and force signals and upload them to the control system, accumulate fatigue cycles and monitor torque fluctuation in real time. Whether the sample cracks or fails or the number of cycles reaches the preset value, the equipment will automatically end the test and complete the torsional fatigue performance test.
In terms of performance parameters, the maximum test torque of LNZP-2000 wheel torsional fatigue tester can reach 2000N・m, the torque control accuracy is 1%, and the minimum torque count is 0.1N・m；. The indication accuracy of the test force is 0.5%, the maximum loading frequency is less than or equal to ≤10Hz, the effective stroke of the actuator is 150mm, and the longitudinal adjustment range of the hub fixing device is 300 mm. The hardware indicators fully meet the detection requirements of the mainstream motorcycle hub.
Compared with traditional testing equipment, this model has many outstanding advantages. The equipment adopts the servo electric drive loading scheme, and there is no need to configure hydraulic oil, so it has low maintenance difficulty, low running noise, fast loading response and stable torque output. The tooling supports fast clamping and positioning of 8-22-inch wheel hub, covering most motorcycle alloy wheel specifications on the market. The torque and force value acquisition scheme is adopted, which has high measurement resolution and ensures that the detected data meet the national standard. Equipped with intelligent operation software, the parameter setting is simple and convenient, which can generate test curves in real time, automatically count the number of cycles, automatically stop the sample when it fails, and completely keep the test records of the whole process. At the same time, it is equipped with multiple protection mechanisms of mechanical limit, software overload protection and electrical emergency stop to protect the safety of operators, tested samples and equipment body in all directions.
Standardized test flow ensures the reproducibility of each test: firstly, lock the hub installation to ensure the installation coaxiality; Secondly, assemble the test arm and check the length of the arm; Input test parameters such as torque, frequency, cycle times and failure protection threshold into the measurement and control software; Start the equipment to carry out alternating loading, and the system automatically records the test data; Monitor the sample status during the test, and the equipment will automatically stop if it fails or reaches the target cycle number; Finally, save the original data, retrieve the test curve, output the official report, and disassemble the sample to complete all the testing work.
In a word, LNZP2000 wheel torsion fatigue testing machine is an indispensable testing equipment for motorcycle wheel hub quality control, which can restore the alternating torsion load actually borne by motorcycle wheel hub, accurately assess the fatigue damage resistance of wheel hub, and help enterprises identify the defects of wheel hub design, material and technology in advance.
Key words: wheel torsional fatigue testing machine, motorcycle wheel hub detection, alloy wheel hub torsional fatigue test, GB/T38183-2019, wheel hub fatigue durability test.