Publish Time: 2023-04-25 Origin: Site
The brake drum is a component in the braking system used to generate a braking force that hinders vehicle movement or tendency to move. In addition to various deceleration devices, automotive brakes are almost all friction brakes that use the friction between the fixed element and the working surface of the rotating element to generate a braking torque.
How many types of brake drums are there?
What are the design requirements for brake drums?
What is the difference between a wheel hub and a brake drum?
Integral casting
The brake drum is cast in one piece from high-strength grey cast iron or alloy cast iron containing Cr. This kind of brake drum is simple in structure, convenient in processing, great in heat capacity, but great in quality, and is mainly used in medium and heavy vehicles.
Combination of sheet steel and cast iron
The brake drum consists of a drum plate punched from sheet steel and a drum ring made of cast iron.
Combination of light metal and cast iron
The main body of the brake drum is made of light metal (such as aluminum alloy, etc.) and is lined with cast iron bushings. This type of brake drum not only has low mass, but also has good heat dissipation and is mainly used in cars.
Improper design of brake drum, which is volatile when heated; The unbalanced force of the brake drum also causes mechanical deformation, resulting in poor contact between the shoe and the drum, resulting in increased pedal force and increased pedal stroke. If it is large, it also causes self-inhibition and produces vibrations and noises. Therefore, the brake drum should have a sufficient wall thickness and circumferential or axial reinforcement ribs should be cast on the outer surface near the opening to improve strength. These ribs also play the role of heat dissipation, which can reduce the temperature of the friction surface, shorten the cooling time of the brake and increase the energy capacity by 35% to 40%.
1. Different characteristics: The hub is the rotating part of the wheel core connected by the inner tread steel of the tire through the column. The brake drum is the friction pair of the drum brake, but as a component it should have the required strength and stiffness.
2. Various devices: Besides various deceleration devices, automotive brakes are almost all friction brakes that use the friction between the fixed element and the working surface of the rotating element to generate a braking torque. The rim matches the tire arrangement and supports the wheel section of the tire.
3. Different composition: The width of the hub is commonly referred to as J-value. The width of the hub directly affects the tire choice. Tires of the same size have different J values and the selected tires have different aspect ratios and widths. The brake drum is cast in one piece from high-strength grey cast iron or alloy cast iron containing Cr.
WONDEE AUTOPARTS was founded 1999 as a professional automotive supplier and specialized in providing semi-trailers and semi-trailer components, trailer components, truck components, agricultural trailers and their components.