Multi-Disk Brake Axial Retention Device for Wear Reduction
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Solution Overview
Problem
Conventional multi-disk brake systems wear quickly when used in applications where disks brake a gearbox input shaft, leading to reduced life duration due to higher RPM and frequent inertia loads, especially in vehicles like trucks and military vehicles.
Innovation Solution
A multi-disk brake assembly with an axial retention device that maintains a predetermined space between stator and rotor disks using spring-loaded pins or bolts, preventing engagement during non-braking operations and allowing engagement during braking, thus reducing wear and extending the brake's life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional multi-disk brake systems are used without axial retention devices, then the brake assembly has simpler structure and lower cost, but the disks contact each other during non-braking operation causing quick wear and reduced life duration
Solution Approach 1:
An axial retention device is introduced as an intermediary component between the rotor disk and stator disk. This device maintains a predetermined axial space between the disks during non-braking operation, preventing harmful contact and wear, while allowing normal braking function when actuated.
Solution Approach 2:
The axial retention device is implemented as a set of discrete pins or bolts distributed around the brake assembly. These individual retention elements work together to maintain disk spacing, providing the protective function through segmented rather than monolithic structure.
2Reliability
If axial retention devices are added to maintain disk spacing, then disk wear is reduced and life duration is extended, but the brake assembly becomes more complex and requires additional components
Solution Approach 1:
The axial retention device is designed to be dynamic rather than static. The pins or bolts can translate axially to accommodate brake actuation, moving from a spacing-maintaining position during non-braking operation to allowing disk engagement during braking. This dynamic behavior enables the simple structure to perform multiple functions.
Solution Approach 2:
The axial retention device serves multiple functions: maintaining predetermined disk spacing during non-braking operation, allowing disk engagement during braking, and potentially providing positioning and alignment functions. This multi-functionality reduces the need for additional separate components.
3Manufacturing precision
If the axial retention device uses fixed pins or bolts, then disk positioning is more precise, but the braking function is affected as pins interfere with disk engagement
Solution Approach 1:
The axial retention device employs pins or bolts that are free to translate axially within their mounting structures. During non-braking operation, the pins extend to maintain precise disk spacing. During braking, the pins retract or translate to allow full disk engagement, eliminating interference with the braking function.
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 axial retention device effectively maintains disk spacing and prevents premature wear, enhancing the brake's life duration and reducing vibration and noise, while ensuring the normal braking function is unaffected.
Implementation Method 1
The axial retention device may include an axially translating pin or bolt set that holds the disks in a predetermined position when the brake is released
Data Source
AI summary
A multi-disk brake assembly includes a stator disk that is non-rotatable, a rotatable rotor disk arranged adjacently and coaxially with the stator disk, and an axial retention device. The rotor disk and the stator disk are axially moveable between an engaged position during braking operation and a disengaged position during a released mode of operation. The axial retention device is axially moveable and supports at least one of the disks. The axial retention device includes a set of axially translatable pins or bolts that are pushed by the disks during the braking operation and maintain a predetermined space between the disks during the released mode of operation. The predetermined space and position of the disks is maintained when the brake assembly is subject to forces due to vehicle acceleration or cornering.