Brake Lining Restoring Mechanism for Wear Compensation

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Solution Overview

Problem

Existing brake lining arrangements in vehicle disk brakes fail to automatically adjust the position of the brake lining relative to the brake disk as the friction lining wears down, leading to increased pedal idle travel and reduced braking efficiency.

Innovation Solution

A brake lining restoring device comprising a clamping limb and a base limb connected via a spring section, which establishes a frictionally locking connection with a holding element that adjusts based on wear, allowing the brake lining to move closer to the brake disk to compensate for wear and reset its position, thereby avoiding long pedal idle travels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the brake lining arrangement uses a fixed position relative to the brake disk, then the structure is simple, but the pedal idle travel increases as the friction lining wears

Engineering Contradiction:
Improvepedal idle travelVSAvoidrestoring device structure
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The restoring device employs a dynamic frictional connection between the clamping limb and the holding element, allowing the brake lining arrangement to automatically adjust its position relative to the brake disk as wear occurs. The spring section provides continuous elastic force that maintains frictional engagement, enabling automatic compensation without complex mechanical linkages or external adjustment mechanisms.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The restoring device is designed to automatically compensate for wear through the interaction between the clamping limb, spring section, and holding element. The system self-regulates by maintaining frictional engagement that allows controlled movement, eliminating the need for manual adjustment or external intervention to maintain optimal brake lining position.

Inventive Principle:
Principle #25Self-service

2Reliability

If the brake lining arrangement allows automatic adjustment for wear, then the pedal idle travel is reduced, but the frictionally locking connection must be reliably maintained

Engineering Contradiction:
Improvefrictionally locking connectionVSAvoidpedal idle travel
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The spring section is pre-loaded to provide continuous elastic force that maintains frictional engagement between the clamping limb and holding element before wear occurs. This preliminary action ensures that the frictionally locking connection is established in advance and remains reliable throughout the wear process, automatically preventing excessive pedal idle travel.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The restoring device utilizes changes in friction parameters through the elastic deformation of the spring section. As the brake lining wears and the arrangement moves toward the brake disk, the spring compresses, maintaining optimal frictional engagement forces dynamically adapted to the wear state, ensuring reliable locking connection throughout operation.

Inventive Principle:
Principle #35Parameter changes

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 automatically compensates for brake lining wear by adjusting the position relative to the brake disk, preventing long pedal idle travels and maintaining effective braking performance by resetting the starting position of the brake lining arrangement.

Implementation Method 1

The at least one clamping limb and the at least one base limb are connected to one another via at least one spring section, it being possible for the at least one clamping limb to be moved with elastic deformation relative to the at least one base limb

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

a frictionally locking connection to a holding element which is assigned to the brake lining arrangement can be established via an edge of the first aperture of the at least one clamping limb

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS11448276B2Brake lining restoring device for a vehicle brake system
Publication Date: 2022.09.20 ZF ACTIVE SAFETY GMBH
  • US11448276B2 patent drawing
  • US11448276B2 patent drawing
  • US11448276B2 patent drawing

AI summary

A brake lining restoring device includes at least one clamping limb with at least one first aperture, at least one base limb, and at least one clamping limb. The clamping limb and the one base limb may be connected to one another via at least one spring section. The clamping limb may be moved under elastic deformation relative to the at least one base limb. The brake lining restoring device may include a frictionally locking connection to a holding element which is assigned to the brake lining arrangement can be established via one edge (R) of the first aperture of the clamping limb.