Rail Brake Lining Reinforcement Rib Design

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Solution Overview

Problem

Disc brake pads in rail and commercial vehicles experience uneven wear and reduced service life due to bending of the lining carrier plate, leading to decreased operational reliability and increased risk of overheating, as existing solutions fail to adequately enhance the flexural rigidity and friction lining volume optimization.

Innovation Solution

Incorporating a reinforcement rib on the lining carrier plate, either outside or within the overlapping area of the friction lining, to increase the flexural rigidity and maintain a thicker friction lining, thereby reducing wear and improving operational reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the thickness of the lining carrier plate is increased to improve flexural rigidity, then the operational reliability is improved, but the available space for friction lining is reduced

Engineering Contradiction:
Improveoperational reliabilityVSAvoidfriction lining volume
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The patent applies local thickening of the lining carrier plate by forming reinforcing ribs only in specific areas where bending stresses occur (outside the friction lining overlapping area), rather than uniformly increasing the plate thickness throughout. This localized reinforcement provides the necessary flexural rigidity to prevent plate bending and maintain operational reliability, while preserving maximum space for the friction lining in the overlapping area where it is most needed for extended service life.

Inventive Principle:
Principle #3Local quality

2Duration of action of moving object

If the friction lining is made thicker to extend service life, then the replacement intervals are extended, but the space available in the caliper is exceeded

Engineering Contradiction:
Improveservice lifeVSAvoidbrake pad volume
Core Design Contradiction:
Duration of action of moving objectVSVolume of moving object

Solution Approach 1:

The patent enables thicker friction lining by creating local clearance space through reinforcing ribs that protrude from the lining carrier plate. These ribs are positioned outside the friction lining overlapping area, effectively creating additional volume within the caliper space that can be utilized for increased friction lining thickness, thereby extending service life without exceeding caliper dimensions.

Inventive Principle:
Principle #3Local quality

3Strength

If nubs are provided on the lining carrier plate to improve connection, then the shearing strength is increased, but the flexural rigidity is not sufficiently improved

Engineering Contradiction:
Improveshearing strengthVSAvoidflexural rigidity
Core Design Contradiction:
StrengthVSReliability

Solution Approach 1:

The patent transitions from providing nubs (point-like features) on the lining carrier plate to forming reinforcing ribs that extend in the longitudinal direction outside the friction lining overlapping area. This dimensional change from point to line/area structures significantly increases the section modulus, thereby substantially improving flexural rigidity and preventing plate bending, while maintaining the connection function.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentEP2820319B1Brake lining for a piston-actuated disc brake of a rail vehicle or a utility vehicle
Publication Date: 2018.04.18 KNORR BREMSE SYST FUR SCHIENENFAHRZEUGE GMBH
  • EP2820319B1 patent drawingFigure 1~3

AI summary

A brake lining for a disc brake of a rail vehicle or utility vehicle, with a lining plate carrier (3) and a friction lining (2) fastened thereon is designed in such a manner that at least one reinforcing rib (5) having a greater thickness than the adjacent region is provided at least on that side of the lining carrier plate (3) which faces the friction lining (2).