Torque Fluctuation Absorbing Apparatus Axial Dimension Reduction
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Solution Overview
Problem
Existing torque fluctuation absorbing apparatuses are prone to increased size due to the need for multiple tolerances in positioning components, which complicates assembly and increases manufacturing costs.
Innovation Solution
A torque fluctuation absorbing apparatus with a vibration absorbing member comprising serially coupled elastic members, where the flange section and intermediate plate positions are determined using a reference outer contour plate, allowing independent positioning and reducing the number of members required, thereby minimizing size and tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the position of the intermediate plate is determined using outer contour plates as references and the position of the flange section is determined using the intermediate plate as a reference, then the positioning is achieved within allowable tolerances, but the axial dimension of the apparatus increases due to the accumulation of tolerances
Solution Approach 1:
The patent extracts the reference function from the intermediate plate and assigns it directly to the outer contour plates. The flange section position and intermediate plate position are both determined independently using the outer contour plates as references, removing the intermediate plate's role as a reference for the flange section and eliminating the need to accumulate tolerances through multiple reference chains.
Solution Approach 2:
The patent segments the positioning function by having the outer contour plates independently reference both the flange section and the intermediate plate. This segmentation of the reference function allows each component's position to be determined independently within its own allowable tolerance range, preventing the accumulation of tolerances that would occur in a chained reference system.
2Manufacturing precision
If multiple members are provided to determine positions within allowable tolerances, then positioning accuracy is maintained, but the number of members increases leading to increased apparatus size
Solution Approach 1:
The outer contour plates are given a universal reference function, serving as the common reference for both the flange section and the intermediate plate. This multi-functionality of the outer contour plates eliminates the need for additional intermediate reference members, reducing the total number of components while maintaining positioning accuracy through independent tolerance control.
3Reliability
If allowable tolerances are added for each material to accommodate springs and avoid inhibiting their action, then the springs can function properly, but the axial dimension of the apparatus increases
Solution Approach 1:
The patent extracts the reference function from the intermediate plate and assigns it directly to the outer contour plates. This allows the flange section and intermediate plate to be positioned independently within their respective allowable tolerances, eliminating the need to add cumulative tolerance ranges that would be required in a chained reference system, thereby reducing the axial dimension while ensuring springs can function properly.
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 achieves miniaturization of the apparatus by reducing the axial dimensions and simplifying assembly, while maintaining effective torque fluctuation absorption capabilities.
Implementation Method 1
a vibration absorbing member in which a plurality of elastic members are coupled in series, and which absorbs torque fluctuations
Data Source
AI summary
A torque fluctuation absorbing apparatus absorbs torque fluctuations occurring in a torque transmission pathway from an input side rotating member to an output side rotating member. The apparatus includes: a vibration absorbing member in which elastic members are coupled in series, and which absorbs torque fluctuations; circular outer contour plates coupled to the input side rotating member, and disposed to be spatially separated from one another in an axial direction of the output side rotating member; a hub member including a boss section coupled to the output side rotating member, and a flange section provided on the boss section and disposed between the outer contour plates; and a circular intermediate plate disposed between the flange section and the outer contour plates, coupled between the elastic members, and transmitting a torque from one elastic member to another elastic member.