Fixed-Caliper Brake Assembly With Integrated Parking Brake
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Solution Overview
Problem
Existing brake apparatuses for vehicles with fixed calipers face challenges in integrating a separate electronic parking brake system, leading to increased component count, assembly complexity, and higher costs, as they require additional components or drum-type brakes to perform parking braking functions.
Innovation Solution
A brake apparatus with a fixed caliper that incorporates a second caliper body and pressing unit, allowing for simultaneous main and parking braking functions without additional devices, featuring a sleeve and guide part configuration for sliding support and direct reaction force transmission, along with a restoration unit for stability and vibration absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate electronic parking brake apparatus is added to a fixed caliper brake system, then the parking braking function is ensured, but the number of components increases and assembly complexity increases
Solution Approach 1:
The patent combines the parking brake mechanism with the existing fixed caliper brake assembly by adding a second caliper body unit and second pressing unit that share the same mounting space and structural framework. The second caliper body unit is integrated with the first caliper body unit through the seating part and sleeve part, allowing both main braking and parking braking functions to be performed within a unified structure rather than adding a completely separate parking brake system.
Solution Approach 2:
The fixed caliper brake assembly is designed to perform multiple functions: the first caliper body unit with first pressing unit handles main braking operations, while the second caliper body unit with second pressing unit handles parking braking operations. Both systems share common structural elements including the disc unit, pad unit, housing, and mounting mechanisms, allowing a single brake assembly to fulfill both braking and parking brake requirements.
2Reliability
If a separate drum-type brake is used for parking brake function, then the parking braking function is ensured, but the number of components increases and manufacturing cost increases
Solution Approach 1:
Instead of adding a separate drum-type brake system, the patent merges the parking brake function into the existing disc brake caliper structure. The second caliper body unit and second pressing unit are integrated within the same housing and mounting framework as the main braking system, sharing common components such as the disc unit, pad unit, and mounting brackets, thereby avoiding the need to manufacture and assemble a completely separate drum brake subsystem.
Solution Approach 2:
The brake assembly is designed as a multi-functional unit where the same structural framework supports both main braking (first caliper body unit) and parking braking (second caliper body unit) operations. This universal design allows a single manufactured component set to serve dual purposes, reducing overall manufacturing complexity and cost compared to producing separate main brake and drum brake assemblies.
3Reliability
If multiple separate brake systems are installed, then both main braking and parking braking functions are ensured, but the assembly process becomes difficult and time-consuming
Solution Approach 1:
The patent merges the parking brake assembly with the main brake assembly into a single integrated unit. The second caliper body unit is seated on the first caliper body unit through the seating part, and both units share the same mounting brackets, housing structure, and disc unit. This integration allows the entire brake system to be assembled as one unit rather than installing separate main brake and parking brake systems independently, significantly reducing assembly steps and installation time.
4Adaptability or versatility
If the guide part is not coaxially aligned with the second pressing unit, then installation flexibility increases, but rotational moment can damage the second caliper body unit
Solution Approach 1:
The patent employs precise asymmetric positioning where the guide part's central axis is deliberately aligned coaxially with the second pressing unit's central axis. This specific asymmetric arrangement ensures that the reaction force from the second pressing unit acts directly through the central axis of the guide part, preventing any rotational moment from developing during operation, while still allowing flexible installation through the standardized mounting interface.
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 design reduces component processing and count, enables flexible piston positioning, ensures stable performance, and prevents rotational moment-induced damage by coaxial alignment of the guide part, thus integrating parking braking functionality within the existing brake apparatus structure.
Implementation Method 1
The restoration unit may be elastically deformable and in contact with an outer peripheral surface of the sleeve part and an inner peripheral surface of the guide part
Implementation Method 2
a brake apparatus for a vehicle refers to an apparatus for braking a vehicle by using a frictional force between a pad and a disc
Implementation Method 3
pushing a piston using a hydraulic pressure generated by a master cylinder
Data Source
AI summary
A brake apparatus for a vehicle may include: a pad unit disposed to face a disc unit; a first caliper body unit fixed to a vehicle body and configured to support the pad unit so that the pad unit is movable; a first pressing unit installed on the first caliper body unit so as to be movable forward or rearward and configured to press the pad unit to apply a main braking force; a second caliper body unit slidably installed on the first caliper body unit; and a second pressing unit installed on the first caliper body unit so as to be movable forward or rearward and configured to press the pad unit to apply a parking braking force together with the second caliper body unit.