Thrust Plate Bearing Assembly Axial Wear Reduction
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Solution Overview
Problem
Conventional axle shaft cover plate designs in heavy machinery lead to distortion and wear due to the differential in rotational velocity, resulting in increased maintenance and potential axle failure.
Innovation Solution
A thrust plate and bearing assembly with a spherical thrust bearing, including a cone, cup, and spherical tapered rollers, is used to reduce axial thrust and allow for efficient engagement with the axle shaft, while the thrust plate's design with a central axis and cylindrical extension facilitates press fit engagement with the bearing, reducing wear and stress on the axle shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional cover plate is used to restrict axial movement of the axle shaft, then the axial position is controlled, but the axle shaft and cover plate suffer from distortion and wear due to rotational velocity differential
Solution Approach 1:
A thrust plate is introduced as an intermediary component between the axle shaft and the cover plate. The thrust plate rotates with the axle shaft at high velocity while the cover plate remains stationary, eliminating the rotational velocity differential that causes wear and distortion. The thrust plate mediates the interaction between the rotating axle shaft and the stationary cover plate, allowing axial position control without direct contact between components with different rotational velocities.
Solution Approach 2:
The cover plate assembly is segmented into multiple components: the stationary cover plate, the rotating thrust plate, and the bearing. This segmentation allows each component to perform its specific function - the cover plate provides structural support and axial positioning, the thrust plate handles the rotational interface with the axle shaft, and the bearing supports the rotational load. This division resolves the contradiction by separating the axial positioning function from the rotational velocity differential.
2Ease of operation
If the inner cover plate is removed for maintenance, then access to the axle shaft is improved, but lubricant must be drained from the final drive housing
Solution Approach 1:
The bearing assembly is extracted from the final drive housing and integrated with the inner cover plate, creating a self-contained maintenance unit. The bearing is pressed onto the thrust plate, which is then attached to the inner cover plate. This extraction allows the bearing and thrust plate to be removed as a single assembly with the inner cover plate, providing maintenance access without requiring lubricant draining from the entire final drive housing.
3Reliability
If a spherical thrust bearing with cone, cup, and spherical tapered rollers is used, then axial thrust is reduced and engagement with the axle shaft is improved, but the device complexity increases
Solution Approach 1:
The bearing assembly is merged with the thrust plate and inner cover plate to form an integrated unit. The spherical thrust bearing with cone, cup, and spherical tapered rollers is pressed onto the thrust plate, which is then attached to the inner cover plate. This merging allows the complex bearing assembly to be installed and removed as a single unit, reducing the practical complexity of maintenance despite the increased structural complexity of the bearing itself.
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 effectively reduces wear and stress on the axle shaft, decreases maintenance time, and extends component life by allowing for efficient replacement of the thrust plate and bearing assembly without draining lubricant, thereby improving operational efficiency and reducing downtime.
Implementation Method 1
spherical thrust bearing, including a cone, cup, and spherical tapered rollers
Implementation Method 2
thrust plate and bearing assembly with a spherical thrust bearing, including a cone, cup, and spherical tapered rollers, is used to reduce axial thrust
Implementation Method 3
thrust plate's design with a central axis and cylindrical extension facilitates press fit engagement with the bearing, reducing wear and stress on the axle shaft
Implementation Method 4
reducing wear and stress on the axle shaft
Data Source
AI summary
A thrust plate for use in a drive assembly between an end of an axle shaft and a bearing, the bearing retained within a housing of a rotatable final drive component, the thrust plate having a first end that defines an axle engaging wear surface and a second end that includes an extension configured for fitted engagement with the bearing, the thrust plate further including a central axis of rotation, where the axle engaging wear surface is disposed transverse to the central axis. A thrust plate and bearing assembly for a final drive cover plate includes the thrust plate in combination with a spherical thrust bearing, these components also being provided in a rebuild kit.