Multi-Disk Brake Wobbling Prevention
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Solution Overview
Problem
Multi-disc brakes used in heavy agricultural and construction machinery experience high residual grinding torques and rattling noises due to wobbling movements of rotating brake discs, which lead to uneven wear and are not suitable for high-speed road vehicles like trucks or buses.
Innovation Solution
A multi-disc brake design where each rotating brake disc is held in a stop position with axially displaceable pressure elements that compensate for wear, and return springs provide a preload to ensure frictional contact, overcoming wobbling forces and noises, allowing for use in high-speed applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If brake discs are floatingly mounted in toothed or bolt guides, then the brake discs can accommodate thermal expansion and wear, but wobbling movements occur during driving causing high residual grinding torques and rattling noises
Solution Approach 1:
The patent applies preliminary action by pre-positioning the brake discs in a defined stop position using return springs before braking occurs. This preliminary positioning prevents wobbling movements during operation by ensuring the discs are already correctly aligned and constrained, eliminating the need for floating mounting that causes rattling noises and grinding torques.
Solution Approach 2:
The patent introduces an intermediary mechanism - the return springs with stop position - that mediates between the brake disc and the mounting structure. This intermediary component actively maintains the brake disc in a stable position, preventing direct contact and wobbling that occurs with floating mounting, while still allowing for thermal expansion and wear accommodation.
2Stability of the object's composition
If return springs are used to press brake discs against stops, then brake discs are held in a defined position preventing wobbling, but wear compensation becomes difficult with fixed stops
Solution Approach 1:
The patent applies dynamics by making the stop position adjustable rather than fixed. The stop can be repositioned axially to compensate for wear on the brake discs and pressure elements. This dynamic adjustment capability allows the system to maintain stable positioning (preventing wobbling) while adapting to wear over time, resolving the contradiction between stability and adaptability.
Solution Approach 2:
The patent changes the parameter of the stop position along the axial direction to compensate for wear. By adjusting this positional parameter, the system maintains optimal braking performance and prevents wobbling movements even as components wear. This parameter adjustment enables both stable positioning and wear compensation simultaneously.
3Stability of the object's composition
If pressure elements are held in a frictional manner with high force threshold, then wobbling forces are overcome, but brake actuation requires higher force to overcome the threshold
Solution Approach 1:
The patent applies preliminary anti-action by using return springs to pre-compress the pressure elements against the stops before braking occurs. This preliminary compression creates a pre-load that maintains stable alignment and prevents wobbling during operation. The actuation force only needs to overcome this pre-compression, rather than creating compression from scratch, thereby reducing the total actuation force required while maintaining stability.
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
Prevents wobbling movements and associated wear, reducing noise and extending service life, enabling the use of multi-disc brakes in fast-running road vehicles by maintaining effective frictional contact and adjusting for wear through adaptable pressure elements.
Implementation Method 1
the brake disks (3) in the unbraked position are pressed in blocks by axially acting return springs (8) against an axially fixed stop (5)
Implementation Method 2
The pressure elements are held in a frictional manner and, when the associated brake disc is applied, form a force threshold that is higher than the shaking and wobbling forces that are effective during driving
Implementation Method 3
By means of a clamping device (6), during braking, the radially extending slats (4) and the brake discs (3) are pressed against each other
Data Source
Figure 1~2
AI summary
The invention relates to a multi-disk brake, in particular for a road vehicle, provided with parallel disks (4) which are arranged at a distance from each other and which are rotationally stable and between which a rotatable disk brake (3) is positioned. The radially extending disks (4) and the brake disks (3) can be pressed against one another during breaking while overcoming a clearance and once the break is released, the disks are separated from each other thus forming a clearance, such that the brake disks (3) are pressed individually in the non-brake position by axially working restoring springs (8) and/or in groups counter to an axially stationary stop (5) which can be rotated with the brake disks (3).