Angular Contact Roller Bearing with Integral Rims

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing deep-groove ball bearings used in motor vehicle internal combustion engines have limitations in radial load capacity due to a small number of bearing balls, while cylindrical roller bearings are costly and over-dimensioned, and angular contact roller bearings face issues with rim detachment under high loads.

Innovation Solution

Designing a single-row angular contact roller bearing with conical raceways and integrally formed rims on both bearing rings, using tapered rollers or other obliquely arranged rollers, and a comb-type cage for assembly, which reduces manufacturing costs and enhances load capacity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If deep-groove ball bearings are used, then rotational speed limits are high and friction is low, but radial load capacity is limited due to small number of bearing balls

Engineering Contradiction:

Improveradial load capacityVSAvoidnumber of bearing balls

Core Design Contradiction:

ForceVSQuantity of substance

Solution Approach 1:

The patent changes the bearing type from ball bearings to roller bearings, specifically using tapered rollers instead of spherical balls. This parameter change allows for increased load capacity because rollers have larger contact area with the raceways compared to point contact of balls, enabling more rollers to be arranged in the same space while carrying higher radial and axial loads.

Inventive Principle:

Principle #35Parameter changes

2Force

If cylindrical roller bearings are used, then radial and axial load capacity is high, but manufacturing costs are very high due to high level of cutting machining

Engineering Contradiction:

Improveload capacityVSAvoidmanufacturing cost

Core Design Contradiction:

ForceVSEase of manufacture

Solution Approach 1:

The patent applies local quality by forming the raceways with conical geometry rather than cylindrical geometry. The conical raceways allow for more efficient material removal and reduced machining complexity compared to cylindrical roller bearings, while still achieving the desired load capacity through the tapered roller configuration and optimized contact angles.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of using cylindrical rollers with cylindrical raceways (conventional approach), the patent inverts the geometry by using tapered rollers with conical raceways. This inversion simplifies the manufacturing process by reducing the complexity of cutting machining while maintaining high load capacity through the optimized conical contact surfaces.

Inventive Principle:

Principle #13The other way round (Inversion)

3Ease of operation

If separate rim components are used in angular contact roller bearings, then assembly is simplified, but rim detachment can occur under high loads

Engineering Contradiction:

Improveassembly simplicityVSAvoidrim integrity

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent merges the rim and bearing ring into a single integral component rather than using separate rim components. This combining eliminates the risk of rim detachment under high loads while maintaining assembly simplicity through the overall bearing design. The integral construction ensures that the rim cannot separate from the bearing ring, providing reliable support for the rollers under all operating conditions.

Inventive Principle:

Principle #5Merging (Combining)

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 solution provides a higher radial and axial load capacity than deep-groove ball bearings with lower manufacturing costs and assembly complexity, ranking between deep-groove and cylindrical roller bearings in load capacity, while ensuring rim integrity and reduced friction.

Implementation Method 1

roller-type rolling bodies (10) which roll on the raceways (4, 8) of the bearing rings (2, 6)

Methodology Applied

Scientific EffectRolling: Roller

Implementation Method 2

reduced friction

Methodology Applied

Scientific EffectFriction: Friction

Implementation Method 3

radial and axial load capacity

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Data Source

PatentUS10690181B2Angular contact roller bearing and method and device for the assembly thereof

Publication Date: 2020.06.23 SCHAEFFLER TECHNOLOGIES AG & CO KG

AI summary

Angular contact roller bearings include an inner bearing ring with an inner raceway, which is arranged on the outer shell surface of the inner bearing ring so as to be inclined with respect to the bearing axis of rotation. An outer bearing ring has an outer raceway, which is arranged on the inner shell surface of the outer bearing ring so as to be inclined with respect to the bearing axis of rotation. An integrally formed rim delimits each, and a multiplicity of roller-type rolling bodies are arranged between the bearing rings and roll on the raceways of the bearing rings and are held with uniform spacings to one another in a circumferential direction by a bearing cage.