Transmission Output Element Force Segmentation
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Solution Overview
Problem
Existing gear designs with interior tooth arrangements face issues such as limited torsional strength, high power density requirements, complex assembly, and increased wear due to bearing-free support of output members, leading to inefficiencies and premature failure.
Innovation Solution
A gear design featuring a hollow cylinder-like base body with an interior tooth arrangement, where only one rotating body is directly seated on the base body to absorb axial forces, reducing the need for complex connecting elements and allowing independent force application between rotating bodies, thereby increasing torsional strength and power density while simplifying assembly and reducing weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both rotating bodies are directly seated on the base body, then the output member is supported against axial and radial forces, but the connecting elements are subjected to high dynamic stress and the assembly becomes complex
Solution Approach 1:
The patent divides the support function into two independent parts: one rotating body is supported by axial bearings against axial forces, while the other rotating body is supported by radial bearings against radial forces. This segmentation eliminates the need for complex connecting elements to transmit forces between rotating bodies, simplifying the assembly while maintaining support stability.
2Force
If both rotating bodies are directly seated on the base body, then force transmission is direct, but twisting of the seating and increased wear occurs
Solution Approach 1:
The patent separates the force transmission paths by providing dedicated axial bearings for axial forces on one rotating body and dedicated radial bearings for radial forces on the other rotating body. This prevents twisting moments from being transmitted through the seating interfaces, reducing wear and improving reliability while maintaining effective force transmission.
3Stability of the object's composition
If connecting elements are used to secure rotating bodies, then the output member is held together, but the connecting elements are dynamically stressed and may fail
Solution Approach 1:
The patent extracts the force transmission function from the connecting elements that would otherwise be needed to secure both rotating bodies to the base body. By providing independent bearing support for each rotating body, the connecting elements are relieved of dynamic stress and only need to perform their primary function of holding the output member together, significantly improving their durability.
4Force
If axial forces are transmitted through the base body to the other rotating body, then force distribution is achieved, but frictional losses and heating increase
Solution Approach 1:
The patent segments the force transmission paths so that axial forces act on one rotating body and radial forces act on the other rotating body, with each force type handled by dedicated bearings. This prevents axial forces from being transmitted through the base body to the other rotating body, eliminating the frictional losses and heating that would result from such force transmission while maintaining effective force distribution.
Data Source
AI summary
Described is a transmission, having a hollow cylindrical base body, which has an internal toothing and a rotational axis, with end sides in which are rotatably mounted a driven input element and an output element, wherein the output element comprises two rotary bodies which can be or are connected to one another in a non-rotatable fashion and which have a circular cross section transversely with respect to the rotational axis and between which are arranged at least one gearwheel and means for converting planetary movements of the gearwheel into rotational movements of the output element. In the transmission, the forces which hold the output element together and the bearing forces which act between the output element and the base body are independent of one another.