Rotary Inertia Mass Damper Ring Gear Support With Fewer Parts
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Solution Overview
Problem
Conventional rotary inertia mass dampers increase costs due to a higher number of assembly parts and complex manufacturing processes, while aiming to improve vibration damping effects.
Innovation Solution
The damper device incorporates a ring gear with an annulus gear and a weight body fixed to it, where the inner circumferential surface of the weight body is supported by the tip of the pinion gear or the outer surface of a washer, allowing for a simpler pinion gear structure and accurate alignment, thus reducing assembly parts and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a radial direction supporting portion is added to the pinion gear to support the ring gear, then the ring gear can be accurately aligned and rotate smoothly, but the number of assembly parts increases and manufacturing complexity increases
Solution Approach 1:
The patent merges the radial direction supporting function into the existing pinion gear structure by forming a supporting surface on the outer peripheral surface of the pinion gear body. This eliminates the need for a separate radial direction supporting portion, thereby maintaining accurate alignment of the ring gear while reducing the number of assembly parts and simplifying the overall structure.
2Manufacturing precision
If a radial direction supporting portion is added to the pinion gear to support the ring gear, then the ring gear can be accurately aligned and rotate smoothly, but the manufacturing and assembly process steps increase
Solution Approach 1:
The supporting surface for the ring gear is integrated directly into the pinion gear body by forming it on the outer peripheral surface. This eliminates the need for separate manufacturing steps for producing a distinct radial direction supporting portion, thereby maintaining high alignment accuracy while simplifying the manufacturing and assembly processes.
3Reliability
If washers are added to support the ring gear, then the inner circumferential surface of the weight body is supported in the radial direction, but the number of assembly parts increases
Solution Approach 1:
The patent integrates the radial direction support function directly into the pinion gear structure by forming a supporting surface on its outer peripheral surface. This eliminates the need for separate washers, thereby maintaining reliable support stability for the ring gear while reducing the number of assembly parts.
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 enhances vibration damping effects while maintaining cost efficiency by reducing the number of assembly parts and simplifying the manufacturing process, allowing for adjustable moment of inertia to optimize damping performance.
Implementation Method 1
an elastic body that transmits torque between the input element and the output element
Implementation Method 2
a ring gear that meshes with the pinion gears and that serves as the mass body
Implementation Method 3
the vibration damping effect of the rotary inertia mass damper can be further improved
Data Source
AI summary
A damper device including an input element and an output element; an elastic body transmitting torque between the input element and the output element; and a rotary inertia mass damper having a mass body. The rotary inertia mass damper includes a sun gear, a carrier rotatably supporting pinion gears, and a ring gear that meshes with the pinion gears and serving as the mass body. A pair of washers is located on both sides of each pinion gear axially. The ring gear includes an annulus gear having internal teeth meshing with the pinion gears and a weight body fixed to the annulus gear such that the weight body is in contact with a side surface of the annulus gear. An inner circumferential surface of the weight body is supported in a radial direction by a tip of the pinion gear or an outer circumferential surface of the washer.