Tracked Roller Bearing Assembly Without Axial Nut Adjustment
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Solution Overview
Problem
The assembly and maintenance of tracked undercarriage roller assemblies are complex and difficult due to the need for precise adjustment of adjustment ring nuts, which can lead to preload variations and reduced operating life of the rolling bearings, especially in remote and inaccessible regions.
Innovation Solution
A tracked undercarriage roller assembly design featuring a single rolling bearing with two radially inner bearing rings and two sets of rolling bodies, utilizing press fittings and fixed references to ensure correct axial clearance without the need for continuous adjustment of adjustment ring nuts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional tapered rolling bearings with adjustment ring nuts are used, then axial clearance can be adjusted, but the assembly and maintenance become complex and require specialized labor
Solution Approach 1:
The invention extracts and eliminates the adjustment ring nut and its threaded portion from the bearing assembly. By removing these adjustment components, the complex assembly and maintenance process is simplified while maintaining the ability to achieve correct axial clearance through the press fit design alone.
Solution Approach 2:
The bearing assembly is designed to automatically achieve correct axial clearance through the press fit between the outer bearing ring and the roller body, without requiring manual adjustment by specialized personnel. The system serves itself by establishing the correct clearance through the manufacturing process rather than requiring post-assembly adjustment.
2Reliability
If adjustment ring nuts are used to control axial clearance, then bearing operation can be optimized, but installation and maintenance require specialized labor and are difficult in remote regions
Solution Approach 1:
The adjustment ring nut and threaded adjustment mechanism are completely removed from the bearing assembly. This eliminates the need for specialized adjustment procedures while maintaining bearing reliability through the press fit design that automatically establishes correct axial clearance.
Solution Approach 2:
The correct axial clearance is established in advance during the manufacturing process through the press fit design, rather than requiring adjustment during installation or maintenance. This preliminary establishment of correct clearance simplifies field installation and maintenance while ensuring reliable bearing operation.
3Measurement precision
If conventional bearing assembly with multiple components is used, then axial clearance can be controlled, but manufacturing and assembly tolerances create uncertainty in axial distance
Solution Approach 1:
The invention merges the functions of axial clearance control into the press fit design itself, eliminating the need for separate adjustment components. By combining the outer bearing ring, roller body, and press fit mechanism into an integrated design, the system reduces the cumulative effect of multiple tolerances while maintaining precise axial clearance control.
Data Source
AI summary
A tracked undercarriage roller assembly including a roller body having an inner cavity delimited by a radially inner surface and a shaft inserted into the inner cavity of the roller body; a rolling bearing including a single radially outer bearing ring, a first radially inner bearing ring and a second radially inner bearing ring, a first assembly of rolling bodies and a second assembly of rolling bodies, wherein the first assembly of rolling bodies is radially interposed between the radially outer bearing ring and the first radially inner bearing ring, the second assembly of rolling bodies is radially interposed between the radially outer bearing ring and the second radially inner bearing ring, wherein the radially outer bearing ring is in contact with the radially inner surface of the roller body and wherein the first and second radially inner bearing rings are in contact with the shaft.