Rib-Reinforced Bearing Casing for Spurious Load Resistance

Solution Overview

Problem

Casing for rotary shaft bearing units in food applications often fails due to unpredictable spurious loads during transportation and usage, leading to mechanical failure even below the stated design load, particularly at the critical connection points between the base and seat of the bearing unit.

Innovation Solution

A reinforced casing made of composite polymeric material with strategically placed ribs to distribute stress uniformly and increase the allowable radial and shear load, reducing localized stress peaks and enhancing structural strength.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If the casing is made of composite polymeric material, then the casing is lightweight and suitable for food applications, but the casing lacks sufficient structural strength to withstand spurious loads during transportation

Engineering Contradiction:

Improvecasing weightVSAvoidstructural strength

Core Design Contradiction:

Weight of moving objectVSStrength

Solution Approach 1:

The casing is made of composite polymeric material, combining multiple materials to achieve both lightweight properties and enhanced structural strength. The composite structure allows the casing to maintain low weight while withstanding spurious loads during transportation and usage.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

Reinforcing ribs are strategically placed at critical areas of the casing, such as the base and connection points, to provide localized strength enhancement. This allows the casing to maintain overall lightweight properties while having reinforced zones that can withstand high stresses during transportation.

Inventive Principle:

Principle #3Local quality

2Ease of manufacture

If the casing design is simple without reinforcement, then the manufacturing is easy and cost-effective, but the casing fails at critical connection points under spurious loads

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidreliability under spurious loads

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

Reinforcing ribs are strategically placed at critical areas of the casing, such as the base and connection points, to provide localized strength enhancement. This allows the casing to maintain overall lightweight properties while having reinforced zones that can withstand high stresses during transportation.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The casing structure is segmented into reinforced and non-reinforced zones, with ribs placed only where needed to withstand spurious loads. This segmentation allows the majority of the casing to remain simple and easy to manufacture, while critical areas receive additional reinforcement.

Inventive Principle:

Principle #1Segmentation

3Strength

If reinforcing ribs are added to the casing, then the structural strength and load distribution are improved, but the device complexity increases

Engineering Contradiction:

Improveallowable radial and shear loadVSAvoidcasing structure complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

Reinforcing ribs are strategically placed at critical areas of the casing, such as the base and connection points, to provide localized strength enhancement. This allows the casing to maintain overall lightweight properties while having reinforced zones that can withstand high stresses during transportation.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Instead of reinforcing the entire casing uniformly, ribs are added only to critical areas where spurious loads are most likely to cause failure. This partial reinforcement approach provides sufficient strength improvement while minimizing the increase in device complexity.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS11808303B2Casing reinforced with ribs for food applications

Publication Date: 2023.11.07 AB SKF SKF PATENT DEPARTMENT

AI summary

A casing of a bearing unit for food applications may include a base having at least one hole for housing at least one fixing bolts, a spherical seat for housing the bearing unit, and at least one reinforcement rib located between the hole and the spherical seat.