Harmonic Pin Ring Gear Deformable Retaining Ring
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Solution Overview
Problem
Existing harmonic pin ring gears face issues with friction losses and wear due to firmly inserted pins, which restricts their efficiency and durability, and they lack flexibility in design for easy maintenance and adaptation.
Innovation Solution
A harmonic pin ring gear design featuring a deformable pin retaining ring with groove-shaped indentations and circular base profiles, allowing pins to rotate freely and be easily exchanged, along with a three-row structure that enables high power density, rigidity, and versatile speed ratios, including differential gear capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If pins are firmly inserted or clipped in under tension, then the pin ring maintains structural stability, but friction losses and wear increase significantly
Solution Approach 1:
The pin retaining ring is designed to be deformable rather than rigid, allowing it to dynamically adapt its shape during operation. The groove-shaped indentations can deform elastically to accommodate pin insertion and rotation, transitioning from a rigid constraint to a flexible, adaptive structure that reduces friction while maintaining stability.
Solution Approach 2:
The invention changes the physical state of the pin retaining ring from rigid to deformable, and the pin insertion from firm/tensioned to loose/free. This parameter change allows pins to rotate freely within groove-shaped indentations, reducing friction losses while the deformable structure maintains overall structural stability through elastic deformation.
2Stability of the object's composition
If pins are firmly inserted or clipped in under tension, then the pin ring maintains structural stability, but wear increases significantly
Solution Approach 1:
The deformable pin retaining ring with groove-shaped indentations allows pins to rotate freely rather than being firmly constrained. This dynamic, flexible structure reduces wear by eliminating rigid friction contacts while maintaining structural integrity through elastic deformation of the grooves during operation.
3Stability of the object's composition
If pins are firmly inserted or clipped in under tension, then the pin ring maintains structural stability, but ease of maintenance and adaptation decreases
Solution Approach 1:
The deformable pin retaining ring with groove-shaped indentations allows pins to be loosely inserted and freely removed, dramatically improving ease of maintenance and adaptation. The elastic deformation capability enables simple pin insertion and extraction without complex fastening mechanisms, while the overall structure maintains stability through deformable groove constraints.
4Power
If a three-row structure with multiple gear pairs is implemented, then power density and versatility increase, but device complexity increases
Solution Approach 1:
The three-row structure implements nesting by placing multiple gear pairs (first and second gear pairs) within concentric cylindrical arrangements. The inner ring, outer ring, and pin retaining ring are nested concentrically, with the pin retaining ring positioned between the inner and outer rings. This nested configuration achieves high power density and versatility while managing complexity through systematic spatial organization.
Solution Approach 2:
The invention transitions from planar gear arrangements to three-dimensional concentric cylindrical structures. Multiple gear pairs are arranged in different planes (first plane, second plane, third plane) along the axial dimension, enabling high power density and versatile speed ratios by utilizing spatial depth rather than just radial or tangential dimensions.
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 solution significantly reduces friction losses and wear, enhances power density, and allows for a wide range of speed ratios and compact installation, enabling efficient operation and easy maintenance, while supporting single-stage and multi-stage speed changes and directional changes.
Implementation Method 1
The flexible, endless toothed meshing band is pressed into the teeth of an external toothing by a movement of an internal toothing, the internal toothing being mounted on an eccentric
Implementation Method 2
the pins can rotate about their own axis within the grooves, so that friction losses and wear are reduced
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The present application discloses a harmonic pin ring gear system that has at least one inner ring (7) with external teeth and at least one outer ring (6) with internal teeth, and a pin ring (3) with pins that have a circular cross-section and a rotor (4) with a transmitter (4) for pushing the pins of said pin ring (3) into the teeth of said outer ring (6) and into the teeth of said inner ring (7). The transmitter (4) deforms the pin ring (3) in such a way that the outer ring and the inner ring rotate relative to each other. The pin ring (3) has a deformable pin-retaining ring (3), said pin-retaining ring (3) having groove-shaped recesses which each have a base (33) into which the pins are loosely placed.