The computerized hub brake durability testing machine is a specialized device designed to test the performance of hub brake systems in bicycles, electric bikes and other vehicles. It is mainly used to ...
The computerized hub brake durability testing machine is a specialized device designed to test the performance of hub brake systems in bicycles, electric bikes and other vehicles. It is mainly used to evaluate the comprehensive performance of hub brakes under long-term and high-frequency braking conditions. By simulating the braking actions and environmental conditions during real riding, this equipment verifies key indicators such as braking performance, durability, and thermal stability of the hub brake system, providing reliable basis for product development, quality control and factory inspection.
Function
1.Brake force test: When the roller speed reaches the preset speed, apply the specified pulling force to the hub brake to brake the wheelset. At this time, a torque opposing the roller will be formed between the wheelset and the roller. The real-time torque read by the torque sensor installed on the roller is the "brake force". Because prolonged braking will cause brake performance loss and thus lead to a decrease in braking force, the system will draw a real-time torque curve graph. According to the drawn curve graph, the trend of braking force loss can be intuitively judged. The brake force test has two modes: "stop mode" and "maximum braking force test", which can be freely switched. (See the following illustration)
2. (Brake stop mode (durability performance test): The motor rotates at a set torque, for example, 30NM. A specified pulling force is applied to the hub brake to brake the wheelset. When the braking torque exceeds 30NM, the motor stops. The braking force and frequency can be set and the number of times recorded. If the motor cannot be stopped within the specified time with the same pulling force after long-term operation, the system determines that the braking efficiency has decreased and automatically stops. The number of braking times before shutdown can be used to more intuitively understand the durability of the product.)
3. (Maximum braking force mode (braking performance test): The motor rotates at full load with the maximum torque, and the hub brake is pulled with a specified force to brake the wheelset. The braking time is set. During braking, the torque sensor reads the real-time torque and plots a curve. The system automatically captures the peak torque during the braking period, which is the maximum braking force. The change trend of the braking force can also be intuitively judged from the curve. This test can help to better understand the braking performance of the product.)
4. Brake heat resistance test: Monitor the trend of brake torque, set the force for long-term braking. Draw a curve of the change in braking force, and evaluate the linear relationship of braking performance under different conditions. Through this test, the stability of braking performance can be more intuitively understood, such as whether there is brake failure or other issues.
Technical parameters
| Parameter | Specification |
|---|---|
| Test Stations | 1 pc |
| Load Pressure Weight Range | 35–75 kg |
| Roller Torque | 50 N·m |
| Roller Surface Driving Force | 142.8 N |
| Roller Driving Speed Range | 15–45 km/h |
| Roller Diameter | 700 mm |
| Torque Sensor Measurement Range | 0–100 N·m |
| Torque Accuracy (Nonlinearity) | 0.1% F.S. |
| Brake Tension Range | 10–600 N |
| Overall Dimensions | Test bench: 500 × 1210 × 2500 mm Control cabinet: 1050 × 780 × 1930 mm |
| Power Requirements | 380V, 4.5 kW, 12 A |
Applicable standards
1. Chinese National Standards:
GB 17761-2024: Safety Technical Specification for Electric Bicycles (It has clear requirements for braking performance, and durability is in reference to relevant industry standards.)
GB/T 22436: Technical Conditions and Test Methods for Brake Shoes of Drum Brakes for Motorcycles and Mopeds.
QC/T 655: Technical Conditions for Brakes of Motorcycles and Mopeds.
2. International Standards:
ISO 4210-4: Bicycles - Safety requirements (Part 4: Test methods for braking, including braking performance tests).
ECE R78: Uniform provisions concerning the approval of braking systems for L-category vehicles (brake tests for motorcycles and mopeds).
JIS D 5301: Japanese Industrial Standard (Test Methods for Brakes for Electric Bicycles).
Core test purpose: The main objects and purposes to be examined include
1. Wear resistance of friction plates: The remaining thickness and uniformity of wear of the friction plates after tens of thousands of braking operations.
2. Brake performance stability: The degree of brake torque attenuation (thermal fade) after multiple consecutive braking operations and the recovery capability after cooling.
Structural fatigue strength: Whether the brake cam, reset spring, shoe block pin shaft, etc. deform, break or jam after repeated loading.
4. Deformation of brake drum: Prolonged friction and heat generation may cause the brake drum to lose its roundness, develop cracks or have a decrease in hardness.
5 Initial/Final Performance Comparison: Whether the braking torque and operating force (brake cable tension) before and after the test meet the standard requirements.
