Electronic Parking Brake Linear Actuator Size Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electronic drum brake designs with a 2-row structure separating the parking part and hydraulic piston make it difficult to reduce the size, making it unsuitable for small vehicles with small wheel layouts.
Innovation Solution
An electronic parking brake device with a housing part, motor part, piston part, and operating part arranged in a line, utilizing hydraulic pressure to operate the brake shoe, where the motor part drives the operating part to move the piston part, reducing the overall size and enabling its use in small vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the parking part and hydraulic piston are separated in a 2-row structure, then the braking function is reliable, but the device size cannot be reduced
Solution Approach 1:
The patent merges the parking part and hydraulic piston into a single integrated structure where the piston serves dual functions. The single piston performs both hydraulic braking and parking braking operations, eliminating the need for separate components while maintaining reliable braking function through unified design.
Solution Approach 2:
The hydraulic piston is designed with multi-functionality to perform both traveling braking and parking braking operations. By incorporating a operating part that can move the piston in different positions, a single component achieves multiple braking functions, reducing overall device size while ensuring reliable operation.
2Reliability
If the parking part and hydraulic piston are separated in a 2-row structure, then the braking function is reliable, but it is difficult to use in small vehicles with small wheel layout
Solution Approach 1:
The patent merges the parking part and hydraulic piston into a single integrated structure where the piston serves dual functions. The single piston performs both hydraulic braking and parking braking operations, eliminating the need for separate components while maintaining reliable braking function through unified design.
Solution Approach 2:
The patent rearranges components in a linear configuration along the axial direction rather than using a 2-row separated structure. This dimensional reorganization allows the operating part and piston to be aligned, creating a compact design that fits small vehicle wheel layouts while preserving braking reliability.
3Volume of moving object
If the operating part and piston part are arranged in a line, then the product size is reduced, but the structural complexity increases
Solution Approach 1:
The operating part is designed with dynamic movement capability along the axial direction, allowing it to move between different positions to operate the piston. This dynamic arrangement enables compact linear configuration while maintaining functional flexibility, reducing product size without excessive complexity through controlled motion rather than fixed multi-component structure.
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 device effectively implements both electronic parking braking and traveling braking using hydraulic pressure, allowing for a compact design suitable for small vehicles by aligning the operating and piston parts, thus reducing the product size.
Implementation Method 1
a piston part mounted on the housing part, and moved by hydraulic pressure so as to operate the brake shoe
Data Source
AI summary
An electronic parking brake device may include: a plate part having a brake shoe rotatably mounted thereon; a housing part mounted on the plate part and configured to guide hydraulic pressure; a motor part mounted on the housing part, and driven when power is applied thereto; a piston part mounted on the housing part, and moved by hydraulic pressure so as to operate the brake shoe; and an operating part embedded in the housing part, and driven by the motor part so as to move the piston part.