Oscillation System Slew Bearing Load Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Articulated dump trucks face challenges in maintaining the longevity of slew bearings due to high moments and radial loads, which are not effectively managed by existing oscillation systems, leading to reduced useful life.
Innovation Solution
Incorporating a rolling-element bearing positioned rearward of the slew bearing relative to the fore-aft axis, which unloads some of the moment on the slew bearing, thereby improving its useful life and maintaining oscillation functionality between the front and rear sections of the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a slew bearing is used to allow oscillation between the oscillation frame and rear frame, then oscillation functionality is achieved, but the slew bearing experiences high moments and radial loads that reduce its useful life
Solution Approach 1:
The oscillation support function is segmented between two bearings: the slew bearing handles primary oscillation while the rolling-element bearing handles radial loads. This division of functional responsibilities reduces the moment burden on the slew bearing, extending its useful life while maintaining oscillation functionality.
Solution Approach 2:
The rolling-element bearing acts as an intermediary component that absorbs and transfers radial loads away from the slew bearing. By positioning it rearward of the slew bearing, it creates a load path that protects the slew bearing from excessive radial forces, thereby improving reliability.
2Duration of action of stationary object
If the rolling-element bearing is positioned rearward of the slew bearing, then radial forces are distributed and slew bearing life is extended, but device complexity increases
Solution Approach 1:
The oscillation system merges the functions of two bearing types into a single integrated assembly. The slew bearing and rolling-element bearing work together as a unified support system, where the rolling-element bearing complements the slew bearing rather than replacing it, achieving load distribution while maintaining compact design.
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 introduction of the rolling-element bearing enhances the durability of the slew bearing by distributing radial forces, thereby extending its operational life and ensuring consistent oscillation performance across varying terrains.
Implementation Method 1
The rolling-element bearing may improve the useful life of the slew bearing by unloading some of a moment on the slew bearing
Data Source
AI summary
A work vehicle comprises a front frame, a rear frame, an oscillation frame, a slew bearing, and a rolling-element bearing. The slew bearing and the rolling-element bearing allow oscillation between the oscillation frame and the rear frame about a fore-aft axis.