Hypocycloid Gear Assembly Equalization Masses
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Solution Overview
Problem
Drive devices for forming machines with hypocycloid gear assemblies face issues with wear and instability due to resultant forces and torques from high stroke rates, leading to reduced quality of formed bodies and increased maintenance needs.
Innovation Solution
The introduction of equalization masses on the planetary and eccentric gears, strategically positioned to eliminate or reduce resultant forces and torques, enhances stability and minimizes wear by balancing the masses according to their point of gravity, thereby optimizing the hypocycloid gear assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high stroke rates are used to increase productivity, then productivity is improved, but wear and instability increase due to resultant forces and torques
Solution Approach 1:
The patent introduces equalization masses on the planetary gear and eccentric gear that are strategically positioned to generate counterbalancing forces. These equalization masses create resultant forces that oppose and reduce the harmful forces and torques generated during high-speed operation, thereby reducing wear and instability while maintaining high productivity
2Reliability
If equalization masses are added to reduce resultant forces, then wear is minimized and stability is enhanced, but device complexity increases
Solution Approach 1:
The equalization masses are integrated into the existing planetary gear and eccentric gear structures rather than being added as separate external components. This merging approach allows the equalization function to be achieved while minimizing additional structural complexity and maintaining compactness of the drive device
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 reduces wear and enhances the stability of the drive device, improving the quality of formed bodies by minimizing the impact of inertia forces and maintaining the drive device's performance during high stroke rates.
Implementation Method 1
a hypocycloid gear assembly (20). The hypocycloid gear assembly (20) comprises an annulus gear (24), a planetary gear system (28) and an eccentric gear (23). The planetary gear system (28) includes an orbiting gear (29) that rolls inside the annulus gear (24)
Implementation Method 2
A first planetary gear equalization mass (m2) is provided on the planetary gear system (28). At least one first eccentric gear equalization mass (m3) is provided on the eccentric gear (23). The resultant forces and torques acting on the annulus gear (24) can at least be reduced
Data Source
AI summary
A drive device (10) for a forming machine (11) includes a hypocycloid gear assembly (20) having an eccentric gear (23), a stationary annulus gear (24) and a planetary gear system (28). The planetary gear system (28) includes an orbiting gear (29) orbiting and rolling in an annulus gear (24). The orbiting gear (29) is connected to at least one first planetary gear (35). On the first planetary gear (35), a first planetary gear equalization mass (m2) is disposed diametrically opposite an output bearing. At least one first eccentric gear equalization mass (m3) is arranged on the eccentric gear (23). The first eccentric gear equalization mass (m3) is arranged diametrically opposite, relative to a planetary gear axis (PA) about which the planetary gear system (28) rotates. The resultant forces and torques acting on the annulus gear (24) can at least be reduced by the equalization masses.