Integrated Drum Brake Module With Adjacent Service and Parking Actuators
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Solution Overview
Problem
Existing drum brake systems for motor vehicles inefficiently utilize installation space and require complex assembly processes due to the diametrically arranged service and parking brake actuators, limiting the integration of efficient braking energy sources and centralized control interfaces.
Innovation Solution
A combined drum brake module with actuator systems positioned in close proximity on a common brake holder, allowing for a dual-mode operation that integrates a simplex service brake with a duo-servo parking brake, utilizing a miniaturized electric parking brake actuator drive train and a centralized interface design for efficient assembly and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If service brake actuator and parking brake actuator are arranged diametrically on the brake holder, then the brake system can perform both service braking and parking brake functions, but the installation space is inefficiently utilized and the assembly process becomes complex
Solution Approach 1:
The patent merges the service brake actuator and parking brake actuator into a compact integrated assembly mounted on a common brake holder. The actuators are positioned adjacent to each other rather than diametrically opposite, consolidating the braking functions into a smaller footprint area while maintaining both service braking and parking brake capabilities.
Solution Approach 2:
The brake holder serves multiple functions: it mounts both the service brake actuator and parking brake actuator, provides structural support for the braking system, and facilitates centralized connection interfaces for hydraulic lines and electrical connections. This multi-functional design reduces the overall space requirement.
2Adaptability or versatility
If service brake actuator and parking brake actuator are arranged diametrically on the brake holder, then the brake system can perform both service braking and parking brake functions, but the assembly process and connection interface routing become complex
Solution Approach 1:
The patent combines the connection interfaces for both actuators into a centralized location on the brake holder. Hydraulic lines, electrical connections, and sensor cables can be routed through a single access point rather than requiring separate routing paths to diametrically opposite locations, significantly simplifying the assembly process and reducing the risk of installation errors.
3Reliability
If diametrically arranged actuator systems are used, then braking functions are distributed, but installation space is not optimized and centralized control interfaces cannot be easily implemented
Solution Approach 1:
The patent positions both actuators in close proximity on the brake holder, creating a localized concentration of braking functions. This allows the connection interfaces to be bundled together in a specific local area, enabling efficient routing of hydraulic lines and electrical cables to a centralized control unit while maintaining the functional distribution of service and parking brake operations.
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
This configuration optimizes installation space, simplifies assembly, and enables reliable and efficient braking performance by combining sensitive torque control with a self-locking parking brake function, suitable for heavy motor vehicles, while allowing for fluid-free or electromechanical operation.
Implementation Method 1
electric parking brake actuator with electromotive drive train
Implementation Method 2
brake shoes (6a, 6b) with friction lining arranged facing one another in a brake drum (4)
Implementation Method 3
drive train is designed to be self-locking without current
Data Source
AI summary
A combined drum wheel brake module comprises a brake holder which can be fixed on a motor vehicle for conjoint rotation and has a counter bearing which is equipped with two brake shoes. The brake shoes are mounted opposite one another for conjoint rotation and can be displaced radially outward in the direction of a brake rotor designed as a brake drum, and wherein, for the purpose of actuating the brakes, there are at least one transmission means and two actuating devices, which are made up as a hydraulic or electric service brake actuator and as an electric parking brake actuator. Both the service brake actuator and the electric parking brake actuator are placed fixed next to one another in a semi-circle on the brake holder.