Spline Biasing Assembly for Gear Rattle Reduction
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Solution Overview
Problem
Existing power transmission systems experience gear teeth rattling noise due to spline-engagement between power transmission members, which complicates the structure and increases costs, and requires complex configurations to reduce noise effectively.
Innovation Solution
A power transmission system using a biasing member and a temporarily fixing member to bias the second power transmission member relative to the first, without altering the spline parts' shapes, allowing for easier assembly and reduced noise through elastic displacement and temporary fixing mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a spring holding member is used to bias the second power transmission member with respect to the first power transmission member to reduce teeth rattling noise, then the teeth rattling noise is reduced, but the structure becomes complicated and the cost increases
Solution Approach 1:
The invention extracts the biasing function from a separate spring holding member and integrates it directly into the second power transmission member through a biasing portion. This eliminates the need for the spring holding member while maintaining the noise reduction effect, thereby simplifying the structure and reducing cost.
Solution Approach 2:
The biasing function is merged with the second power transmission member by forming a biasing portion that includes a spring element integrated into the member itself. This combination eliminates separate components and reduces structural complexity while achieving the same noise reduction purpose.
2Object-affected harmful factors
If the shapes of spline parts are changed to accommodate a spring holding member, then the teeth rattling noise is reduced, but the structure becomes more complicated
Solution Approach 1:
The invention removes the need for modified spline parts by extracting the biasing function from separate spring holding members and integrating it into the second power transmission member. The spline parts maintain their original shapes while the integrated biasing portion provides the necessary biasing force.
Solution Approach 2:
The second power transmission member is designed with multi-functionality, serving both as a power transmission component and as a biasing mechanism through its integrated biasing portion. This eliminates the need for separate spring holding members and modified spline parts, simplifying the overall structure.
3Object-affected harmful factors
If a spring holding member is engaged with spline parts to provide biasing force, then the teeth rattling noise is reduced, but the assembly process becomes more difficult
Solution Approach 1:
The invention extracts the biasing function from a separate spring holding member that requires engagement with spline parts, and integrates it directly into the second power transmission member. This eliminates the engagement step and simplifies the assembly process while maintaining the noise reduction effect.
Solution Approach 2:
The biasing portion is pre-integrated into the second power transmission member during manufacturing, so that no separate assembly steps are required during final assembly. The biasing function is already built-in, eliminating the need for engagement operations and simplifying the assembly process.
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 system effectively reduces gear teeth rattling noise at spline-engagement points while maintaining simplicity and ease of assembly, eliminating the need for a spring holding member and complex configurations.
Implementation Method 1
the spring part is elastically displaceable in a rotational direction
Data Source
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AI summary
A power transmission system is provided, which includes a biasing member configured to bias a second power-transmission member in a rotational direction with respect to a first power-transmission member by a spline part of the biasing member being engaged with a spline part of the second power-transmission member while the biasing member is locked by the first power-transmission member and a spring part thereof is in a first elastically displaced state, and a temporarily fixing member having a temporarily fixing part which temporarily fixes the biasing member to the first power-transmission member in a second elastically displaced state with greater elastic displacement than in the first state. The second power-transmission member is provided, on a first axial side of the spline part, with a canceling part configured to cancel the temporary fixing of the biasing member to the first power-transmission member by the temporarily fixing part.