Pivot Bearing Return Mechanism With Single-Sided Guiding Vane

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Solution Overview

Problem

Existing pivot bearing arrangements require complex fitting of a groove portion onto the pivot lever, making them difficult to produce and simplify.

Innovation Solution

A pivot bearing with a curved bearing shell and a roller bearing cage that features a single-sided guiding vane with a stop face, allowing for a simpler return mechanism and reduced complexity in production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a dual-sided return mechanism with groove portion is used, then the return function is ensured, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improvereturn functionVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention extracts and eliminates the complex groove portion from the pivot lever, retaining only the essential return function through a simplified single-sided stop face on the guiding vane. This removes the problematic fitted connection while preserving the core return mechanism.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of creating a groove in the pivot lever to receive the guiding vane, the invention inverts the approach by providing a stop face on the guiding vane that contacts a return element on the pivot lever. This reverses the complexity from the lever to the cage, where it is easier to implement.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If a groove portion is fitted onto the pivot lever, then the return mechanism is achieved, but the ease of manufacture deteriorates

Engineering Contradiction:

Improvereturn mechanismVSAvoidproduction simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The groove portion fitting operation is completely removed from the manufacturing process. The return mechanism is achieved through the stop face on the guiding vane contacting the return element, eliminating the need for complex groove fabrication and fitting.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention accepts a simpler, potentially less durable grooveless design in exchange for dramatically improved manufacturability. The single-sided stop face provides sufficient return function without requiring precision-fitted grooves that are difficult and expensive to produce.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Device complexity

If the guiding vane is made smaller, then the device complexity is reduced, but the strength and stability deteriorate

Engineering Contradiction:

Improveguiding vane sizeVSAvoidguiding vane strength

Core Design Contradiction:

Device complexityVSStrength

Solution Approach 1:

The invention applies local reinforcement at the critical edge of the guiding vane opposite the stop face. This localized strengthening allows the overall guiding vane to be smaller while maintaining sufficient strength where it is most needed for deformation resistance.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The vane reinforcement is positioned beforehand at the edge most susceptible to deformation. This preventive reinforcement counteracts deformation forces before they can compromise the guiding vane's integrity, allowing for a more compact design.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS20250084897A1Pivot Bearing, Pivot Lever Arrangement and Application Arrangement

Publication Date: 2025.03.13 KNORR BREMSE SYSTEME FUER NUTZFAHIZEUGE GMBH

AI summary

A pivot bearing supports a pivot lever of an application apparatus of a disc brake, wherein the pivot bearing has a curved bearing shell and a roller bearing cage which is pivotably guided thereon, wherein the roller bearing cage has at least one guiding vane which protrudes axially with respect to the pivot axis and which has at only one side an axially extending stop face for returning the roller member cage. A pivot lever arrangement and an application apparatus include the pivot bearing.