Cageless Bearing Structure With Separator Rollers for Low Friction
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Solution Overview
Problem
Conventional bearings experience energy loss due to sliding contact between parts, leading to increased friction and reduced efficiency.
Innovation Solution
The design incorporates an outer and inner race with load-bearing and separator rolling elements, arranged to minimize sliding contact, where separator rolling elements are placed between load-bearing elements to ensure rolling contact only, thereby reducing friction and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional bearings use sliding contact between parts, then the structure is simple, but friction increases and energy loss occurs
Solution Approach 1:
The patent employs spherical rolling elements (balls) and roller elements with curved surfaces to replace sliding contact. The spherical geometry enables pure rolling motion between the inner and outer races, eliminating the sliding friction that causes energy loss while maintaining structural simplicity.
Solution Approach 2:
The patent substitutes sliding friction mechanics with rolling friction mechanics by introducing rolling elements. This mechanical substitution transforms the contact mode from sliding to rolling, significantly reducing friction coefficients and energy loss while preserving the bearing's fundamental structure.
2Loss of energy
If separator rolling elements are added between load-bearing rolling elements, then sliding contact is minimized and efficiency improves, but device complexity increases
Solution Approach 1:
The patent introduces separator rolling elements as intermediary components positioned between the load-bearing rolling elements. These separators act as mediators that prevent direct contact between adjacent rolling elements, eliminate sliding motion between them, and ensure all contacts are rolling contacts, thereby reducing energy loss.
Solution Approach 2:
The patent segments the bearing's rolling elements into two functional categories: load-bearing rolling elements that carry the primary mechanical load, and separator rolling elements that prevent sliding contact. This segmentation allows each type to perform its specific function optimally while working together in the same system.
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
This configuration results in a highly efficient system with minimal sliding losses and even force distribution among rolling elements, improving the bearing's load-carrying capacity and lifespan while reducing friction, making it suitable for applications requiring low noise and high-speed operation.
Implementation Method 1
Each separator rolling element is disposed between a respective pair of the load-bearing rolling elements such that the separator rolling element is in rolling contact with the load-bearing rolling elements of the respective pair
Data Source
AI summary
In one example, a bearing or transmission has an outer race that extends circumferentially about a central axis. An inner race is disposed within the outer race and extends circumferentially about the central axis so as to be coaxial with the outer race. A plurality of load-bearing rolling elements are disposed between the inner race and the outer race, and are spaced circumferentially from one another so as to not contact one another. A plurality of separator rolling elements are disposed within the outer race. Each separator rolling element is disposed between a respective pair of the load-bearing rolling elements such that the separator rolling element is in rolling contact with the load-bearing rolling elements of the respective pair. The load-bearing and separator rolling elements form a contiguous ring.