Planetary Transmission With Movable Gear Axis for Lower Drag Loss
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Solution Overview
Problem
Existing transmission systems face inefficiencies in power transmission due to fixed paths and frictional losses, limiting the distribution and optimal transmission of driving forces.
Innovation Solution
A transmission design where the bearing axis of the planetary gear is movably arranged on the planetary gear carrier, with a rolling outer surface on the drive element and a rolling inner surface on the hollow axle, allowing for an oblique drive force that generates a counteracting force, enabling the planet wheel to rotate and distribute forces effectively, and additional drive elements can be used to further optimize power transmission points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the drive element is arranged on a fixed path (eccentric drive), then the power transmission conditions are favorably influenced, but the planetary gear experiences dragging movement before rotation due to oblique force
Solution Approach 1:
The bearing axle of the planetary gear is made movable on the planetary gear carrier instead of being fixed, allowing the system to adapt dynamically to force directions and eliminate dragging movement while maintaining favorable power transmission conditions
Solution Approach 2:
The drive force is applied obliquely at an angle to the tangential plane of the rolling element, changing the force parameters to create both vertical pressing force and horizontal driving force components, thereby improving power transmission while avoiding energy loss
2Stability of the object's composition
If the bearing axis of the planetary gear is firmly connected to the planetary gear carrier, then the structure is stable, but the power transmission efficiency is reduced due to fixed paths and friction
Solution Approach 1:
The bearing axle is made movable on the planetary gear carrier, transforming the static connection into a dynamic one that reduces frictional losses while maintaining structural stability through controlled movement
Solution Approach 2:
The fixed path constraint is removed from the drive element, allowing it to move freely and reduce frictional losses while still transmitting power effectively to the planetary gear
3Stress or pressure
If a purely vertical force is applied to the hollow axle, then contact pressure is generated, but no rotary movement of the planet wheel occurs
Solution Approach 1:
The drive force is applied at an oblique angle rather than purely vertically, changing the force parameters to include both vertical pressing components (for contact pressure) and horizontal driving components (for rotary movement)
4Stability of the object's composition
If the drive element axis is firmly connected to the carrier, then the structure is stable, but the driving force follows a fixed path causing dragging movement
Solution Approach 1:
The drive element axis is made movable on the carrier instead of being firmly connected, allowing the drive force to follow an adaptive path that eliminates dragging movement while maintaining structural stability through the movable connection
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 design enhances power transmission efficiency by allowing targeted force distribution, reducing frictional losses, and enabling the planet gear to move freely, improving overall gearbox performance.
Implementation Method 1
a rolling element with a rolling surface is fixedly arranged in such a way that an operative connection can be produced between the rolling surface of the rolling element and the outer rolling surface of the hollow axle by means of pressure
Implementation Method 2
an operative connection can be produced by means of pressure between the drive element and the hollow axle; an operative connection can be produced between the rolling surface of the rolling element and the outer rolling surface of the hollow axle by means of pressure
Implementation Method 3
The direction of the drive force is selected in particular in such a way that the hollow axle exerts a contact pressure on the rolling element, which pressure has an oblique component at the point of contact. This means that the force that acts on the rolling element from the hollow axle is neither purely vertical nor horizontal, but has both a vertical and a horizontal force component
Data Source
Figure 1
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AI summary
The invention relates to a transmission comprising: a sun gear element (2) and an internal gear element (3), of which one is arranged fixedly and the other is arranged movably, a planetary gear (4) which is arranged on a bearing axle, a hollow axle (7) which is connected fixedly to the planetary gear (4) and surrounds the planetary gear (4) in a spaced apart manner, and a drive element (12) for driving the hollow axle (7), which drive element (12) is arranged on an axle (1) between the planetary gear (4) and the hollow axle (7). The power transmission conditions in the transmission (1) are improved by virtue of the fact that the bearing axle of the planetary gear (4) is arranged movably on the planetary gear carrier (6), that the drive element (12) has an outer rolling surface (11) and the inner side of the hollow axle which faces said drive element (12) has an inner rolling surface (14), via which an operative connection can be generated between the drive element (12) and the hollow axle (7) by means of pressure, that the hollow axle (7) has an outer rolling surface (9), and a rolling element (10) with a rolling surface (11) is arranged fixedly in such a way that an operative connection can be generated between the rolling surface (11) of the rolling element and an outer rolling surface (9) of the hollow axle (7) by means of pressure, and that a tensile device which is connected fixedly to the axle (13) of the drive element (12) is provided, by means of which tensile device a drive force can be generated which runs obliquely with respect to the tangential plane on the rolling surface (11) of the rolling element at a contact point (P) of the rolling surface (11) of the rolling element (10) with the outer rolling surface (9) of the hollow axle (8).