Integrated Drum Brake Housing for Main and Parking Brake Assembly
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Solution Overview
Problem
Conventional drum brake systems require separate fabrication and installation of main braking and parking braking devices, leading to increased complexity, reduced productivity, and higher fabrication costs due to the need for precise assembly and clearance adjustments to avoid interference.
Innovation Solution
An integrated drum brake apparatus that combines main braking and parking braking units within a single housing, utilizing a housing with a main braking unit driven by hydraulic pressure and a parking braking unit driven by electromotive force, with locking members to secure the components firmly to the back plate, allowing for simplified installation and improved structural stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate main brake device and parking brake device are fabricated and installed, then each device can be independently designed and manufactured, but assembly complexity increases and productivity decreases due to the need for precise clearance adjustment to avoid interference
Solution Approach 1:
The patent combines the main brake device and parking brake device into a single integrated brake assembly. The housing contains both the main brake shoe assembly and parking brake shoe assembly, with the parking brake actuator integrated into the same structure. This merging eliminates the need for separate fabrication and installation processes, allowing both brake functions to be assembled together as one unit, thereby improving productivity while maintaining manufacturing ease through modular design elements.
2Ease of repair
If separate main brake device and parking brake device are installed, then each device can be independently maintained, but overall device complexity and fabrication cost increase
Solution Approach 1:
The integrated brake assembly is segmented into distinct functional modules: the main brake shoe assembly, the parking brake shoe assembly, the parking brake actuator, and the housing. Each module can be independently accessed, inspected, and maintained. The segmentation allows technicians to service specific brake functions without disassembling the entire brake system, maintaining ease of repair while reducing overall device complexity through organized modular architecture.
3Productivity
If integrated main braking and parking braking units are combined in single housing, then manufacturing process is simplified and space utilization is enhanced, but structural stability must be maintained
Solution Approach 1:
The housing is designed as a composite structure combining rigid materials to maintain structural stability while supporting the integrated brake assemblies. The housing incorporates reinforcement ribs and stiffening features that provide the necessary structural integrity to the back plate assembly. This composite design approach allows the integrated units to be manufactured as a single assembly (improving productivity) while maintaining the structural stability required for safe brake operation through carefully engineered material selection and structural design.
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 integrated design simplifies the manufacturing process, reduces size and weight, enhances space utilization, and facilitates easier maintenance and inspection by allowing the actuator to be easily disassembled, while improving the structural stability and stiffness of the back plate.
Implementation Method 1
a main braking unit disposed on a first portion of the housing, the main braking unit configured to be, during main braking, driven by a hydraulic pressure and pressing a shoe
Implementation Method 2
a drum brake refers to an apparatus which generates a braking force through friction with a drum rotating together with a wheel
Implementation Method 3
a parking braking unit disposed on a second portion of the housing, the parking braking unit configured to be, during parking braking, driven by an electromotive force of an actuator and pressing the shoe
Data Source
AI summary
A drum brake apparatus includes: a housing; a main braking unit disposed on a first portion of the housing, and the main braking unit configured to be, during main braking, driven by a hydraulic pressure and pressing a shoe; a parking braking unit disposed on a second portion of the housing, the parking braking unit configured to be, during parking braking, driven by an electromotive force of an actuator and pressing the shoe; a first locking member configured to couple the housing to one surface of a back plate; and a second locking member configured to couple the actuator to the housing on another surface side of the back plate.