Self-Aligning Gear Shaft Assembly for Misalignment Compensation
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Solution Overview
Problem
Existing gear transmissions face misalignment issues due to factors like deflections, assembly errors, and thermal expansion, leading to stress concentration, premature wear, and failure, with conventional solutions failing to effectively compensate for misalignment while maintaining high torque transfer capability and structural integrity.
Innovation Solution
A self-aligning gear assembly incorporating a spline design with elastomeric elements and a curved-faces pin assembly that allows controlled tilting and damping, minimizing unwanted movements and accommodating misalignments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rigid gear transmissions are used, then torque transfer capability is maintained, but misalignment causes stress concentration and premature failure
Solution Approach 1:
The patent introduces compliant elements that change the mechanical parameters of the gear assembly by allowing controlled deformation and movement. This enables the system to adapt to misalignment conditions while maintaining torque transfer capability, resolving the contradiction between reliability and strength by accommodating stress through controlled compliance rather than rigid resistance
Solution Approach 2:
The patent employs composite structures combining rigid gear components with compliant elements. This composite approach allows the rigid portions to maintain torque transfer strength while the compliant portions absorb misalignment stresses, simultaneously improving reliability and preserving strength under misaligned conditions
2Reliability
If misalignment compensation mechanisms are added, then gear assembly reliability improves, but device complexity increases
Solution Approach 1:
The patent merges the misalignment compensation function directly into the gear tooth engagement mechanism itself. The compliant elements are integrated within the existing gear assembly structure rather than added as separate external mechanisms, achieving reliability improvement while minimizing increases in device complexity
Solution Approach 2:
The gear assembly is designed to self-align and self-compensate for misalignment through the inherent compliance of the compliant elements. The system automatically adjusts to misalignment conditions without requiring external control mechanisms or complex adjustment procedures, improving reliability while keeping the device simple
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 self-aligning gear assembly effectively compensates for misalignments, ensuring reliable power transmission with maintained structural integrity and torque transfer capacity, even under high load conditions.
Implementation Method 1
The curved-faces pin assembly includes a cylindrical pin having semicircular ends and a pattern of an elastomeric material
Implementation Method 2
allows controlled tilting and damping, minimizing unwanted movements
Data Source
AI summary
A gear shaft assembly for transmitting torque between gears of a rotating system. The gear shaft includes a shaft that is coaxially disposed in a central opening of a gear assembly including a spline gear and a self-aligning gear. The self-aligning gear has a toothed ring gear with gear teeth having curved surfaces. Inner gear teeth alternate with inner grooves on an inner circumference and outer gear teeth on an outer circumference. The spline gear includes teeth alternating with spline grooves on an outer circumference such that the teeth fit in the inner grooves of a toothed ring gear. A pin assembly having an elastomeric material pattern is disposed on a cylindrical pin with semicircular ends. The elastomeric material permits deformation and close contact between teeth and grooves. The elastomeric material provides alignment compensation through controlled deformation while maintaining torque transfer capability.