Segmented Drum Brake Structure for Lower Vehicle Weight
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Solution Overview
Problem
Conventional drum brakes are heavy due to their construction materials, leading to increased vehicle weight, higher engine output requirements, reduced fuel efficiency, and decreased marketability.
Innovation Solution
A lightweight drum brake design is implemented by dividing the drum into a lightweight body part and a durable friction part, with the body part made of materials like aluminum or plastic and the friction part made of cast iron or ceramic, allowing for easy assembly and replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the drum is made of heavy material such as cast iron, then durability is improved, but vehicle weight increases
Solution Approach 1:
The drum is divided into two distinct parts: a lightweight body part made of aluminum or plastic and a friction part made of cast iron or ceramic. This segmentation allows each part to be optimized for its specific function - the body part for weight reduction and the friction part for durability and friction performance.
Solution Approach 2:
Different materials are used for different parts of the drum based on local requirements. The body part uses lightweight materials (aluminum or plastic) where structural support is needed but weight should be minimized, while the friction part uses heavy-duty materials (cast iron or ceramic) where durability and friction resistance are critical.
2Reliability
If the drum is made of heavy material such as cast iron, then durability is improved, but fuel efficiency deteriorates
Solution Approach 1:
The drum is segmented into lightweight body part and durable friction part, reducing overall weight while maintaining necessary durability. This weight reduction directly improves fuel efficiency by decreasing the energy required to accelerate and move the vehicle.
Solution Approach 2:
Heavy durable materials are used only where absolutely necessary (friction part), while lightweight materials are used for the majority of the drum structure, optimizing the balance between durability and fuel efficiency.
3Reliability
If the drum is made of heavy material such as cast iron, then durability is improved, but engine output requirements increase
Solution Approach 1:
By segmenting the drum into lightweight and durable components, the overall weight is reduced, thereby reducing the power output required from the engine to achieve the same acceleration and performance characteristics.
Solution Approach 2:
The friction part maintains heavy-duty material properties to ensure durability and proper friction characteristics, while the body part uses lightweight materials to reduce inertial mass, thereby reducing the engine power needed for vehicle acceleration.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design reduces the overall weight of the drum brake while maintaining durability, enhancing fuel efficiency and marketability by minimizing vehicle weight and engine output requirements.
Implementation Method 1
the brake shoe is pressed from an inside of the drum to an inner circumferential surface of the drum to generate a frictional force
Data Source
AI summary
The disclosed drum brake includes a brake disc configured to rotate together with a wheel, an inner brake pad and an outer brake pad arranged on both sides of the brake disc, a pressing member configured to press the inner brake pad toward the brake disc, and a caliper housing provided such that the pressing member moves forward or rearward, wherein the brake disc includes a hub part connected to an axle, a friction part provided in contact with the brake pads and disposed to be spaced a predetermined distance from the hub part in an axial direction, and an accommodation part which is formed between an inner surface of the hub part and an outer surface of the friction part and in which at least a portion of the outer brake pad is accommodated.