Simulated Pavement Rotary Drum for Wheel Impact Load Testing

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Solution Overview

Problem

Current bench tests for automobile wheels lack the ability to simulate the impact loads from various uneven pavements, leading to deviations in test results from real-world conditions, which increases development time and costs for vehicle manufacturers.

Innovation Solution

A simulated pavement rotary drum system that replicates track, cobblestone, and impact pavements using 7075 aluminum alloy surfaces and Q345 carbon steel structures, allowing for consistent radial impact load simulation on wheels and chassis systems, facilitating bench testing that mimics real-world conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If road tests at test fields are used to verify wheel reliability, then the test results truly reflect actual operating conditions, but the test period becomes long and test cost becomes high

Engineering Contradiction:

Improvetest result accuracyVSAvoidtest period

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent creates a copy of the actual road surface conditions by fabricating rotary drums with simulated pavement surfaces that replicate the geometric characteristics of real roads. This allows bench tests to reproduce actual operating conditions without requiring full-scale road tests, thereby reducing test time while maintaining measurement accuracy.

Inventive Principle:

Principle #26Copying

2Measurement precision

If road tests at test fields are used to verify wheel reliability, then the test results truly reflect actual operating conditions, but the test cost becomes high

Engineering Contradiction:

Improvetest result accuracyVSAvoidtest cost

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

Inventive Principle:

Principle #26Copying

3Loss of energy

If bench tests are used to verify wheel fatigue and strength performance, then the test cost is reduced, but the test results deviate from real results because proper rotary drums that simulate various pavements are not available

Engineering Contradiction:

Improvetest costVSAvoidtest result accuracy

Core Design Contradiction:

Loss of energyVSMeasurement precision

Solution Approach 1:

Inventive Principle:

Principle #26Copying

4Loss of energy

If conventional bench tests without simulated pavement rotary drums are used, then the test cost is reduced, but the ability to apply impact loads from uneven pavements to wheels and chassis system is lost

Engineering Contradiction:

Improvetest costVSAvoidimpact load simulation capability

Core Design Contradiction:

Loss of energyVSAdaptability or versatility

Solution Approach 1:

The patent designs a universal rotary drum system that can simulate multiple types of pavement conditions (tracks, cobblestones, speed bumps, etc.) on a single bench test platform. This multi-functional apparatus enables various impact load scenarios to be tested without requiring separate test equipment for each condition, maintaining cost efficiency while improving adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11754470B2Simulated pavement rotary drum and automobile test equipment

Publication Date: 2023.09.12 CITIC DICASTAL CO LTD

AI summary

The present disclosure belongs to the technical field of tests of automobile wheels and automobile chassis suspension systems, and provides a simulated pavement rotary drum and automobile test equipment. A simulated cobblestone pavement, and a simulated impact pavement, so that a testing pavement at a test field is reproduced; an impact load caused by the track pavement, the cobblestone pavement, and the impact pavement can be applied to wheels and a chassis system; and a road simulation test of wheels and a suspension system of an automobile can be performed on bench test equipment. As verified, the simulated pavement rotary drum of the present disclosure can reproduce the simulated track pavement at the test field; and the consistency of radial impact loads is greater than 95% at the same speed and under the same vehicle load operating condition.