Analysis of the braking performance of drum brakes

The brake performance analysis of drum brakes is as follows:

1. Braking force

Strong absolute braking force: The drum brake expands the brake shoe to rub against the inner wall of the brake drum, with a curved contact surface design, resulting in a greater braking torque. It is particularly suitable for quickly stopping heavy-duty vehicles, such as three-wheeled vehicles with a load capacity of 500kg;

Inertia assist effect: The inertia of the rotating brake drum enhances the friction effect between the brake shoe and the drum, ensuring stable braking even when the assistance is insufficient.

II. Heat dissipation performance

Significant heat decay: The sealed structure results in poor heat dissipation, and the braking force may decay by more than 30% after 10 consecutive downhill runs. High-temperature expansion can also lead to an increase in brake pedal travel;

Good low-temperature adaptability: The enclosed design is more stable in snowy and icy weather, making it less prone to icing and skidding.

III. Response speed and controllability

Slow response: The mechanical structure leads to a delayed braking response, making it less sensitive than disc brakes during emergency braking;

Poor brake linearity: It is difficult to precisely control the braking force, and sudden braking sensations are prone to occur.

IV. Environmental adaptability

Dustproof and waterproof: The sealed structure can reduce the intrusion of sediment and moisture, making it suitable for harsh road conditions;

Low maintenance cost: simple structure, long replacement cycle (adjusted once every 2-3 years), suitable for economical vehicles.

V. Applicable Scenarios

Recommended scenarios: low-speed short-distance commuting, vehicles with high load demands or limited budgets (such as entry-level electric vehicles, vans);

Not recommended scenarios: frequent braking, long downgrades, or high-speed driving environments (prone to thermal decay).

Summary: Drum brakes excel in braking force and cost, but their heat dissipation and response speed are weak points. The choice should be made based on actual needs and trade-offs.