Clamping Ring with Thickened Areas for Planetary Gear Torque
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Solution Overview
Problem
Existing connections for planetary gears, particularly on the fast-rotating input side, face challenges in achieving a high connection torque with minimal mass and efficient balancing, as they often require complex manufacturing steps and separate balancing processes.
Innovation Solution
A connection design featuring a shaft partially inserted into a hollow shaft with a clamping ring that includes radially and axially continuous slots, thickened areas for balancing, and a screw with a non-vanishing angle, allowing for a non-positive connection that can be tightened to achieve high torque with low effort, while the slots and thickened areas compensate for material deficiencies and simplify manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a clamping ring connection is used on the fast-rotating side of a planetary gear, then the connection torque can be transmitted, but the mass moment of inertia increases and balancing becomes complex
Solution Approach 1:
The clamping ring is designed with non-uniform wall thickness, featuring thickened areas at specific circumferential positions and thinner areas at others. This local variation in mass distribution allows the connection to achieve high torque transmission capability while maintaining low overall mass moment of inertia, enabling easy balancing without additional counterweights
Solution Approach 2:
The invention changes the geometric parameters of the clamping ring by introducing thickened areas with specific radial widths that vary in the circumferential direction. This parameter modification optimizes the mass distribution to reduce the mass moment of inertia while preserving the connection torque capability
2Strength
If the ring part is shrunk onto the hollow shaft to achieve high connection torque, then the connection strength increases, but the manufacturing complexity increases
Solution Approach 1:
The clamping ring is designed with continuous slots that divide the ring structure into segments. These slots allow the ring to be shrunk onto the hollow shaft more easily while maintaining connection strength, and the slots can be manufactured using standard machining processes without requiring complex forming operations
Solution Approach 2:
The thickened areas are strategically positioned to provide localized reinforcement where the connection torque is transmitted, while other areas remain thinner to reduce mass. This local quality variation allows the connection to achieve high strength without requiring the entire ring to be thick-walled, simplifying the manufacturing process
3Weight of moving object
If material is removed from the ring part to reduce mass moment of inertia, then the balancing becomes easier, but the connection strength decreases
Solution Approach 1:
Instead of uniformly reducing material throughout the ring, the invention selectively removes material only in specific circumferential areas where it is not needed for torque transmission. The thickened areas are positioned to maintain connection strength while thinner areas reduce the mass moment of inertia, achieving both goals simultaneously
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 connection achieves a high connection torque with minimal mass and effort, allowing for balanced operation without additional balancing steps, and is easily manufacturable, with the slots and thickened areas ensuring effective material distribution and elasticity.
Implementation Method 1
a screw is passed through the slot and the screw head of the screw is supported on a surface, wherein the threaded area of the screw is screwed into a threaded hole
Implementation Method 2
the ring part can be shrunk onto the hollow shaft
Data Source
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AI summary
Coupling comprising a shaft inserted at least partially into a hollow shaft and a ring slipped onto the hollow shaft, in particular a clamping ring, wherein the ring is axially delimited by a collar formed on the shaft, in particular a radially protruding collar, and/or the ring abuts a collar or the shaft collar, in particular a collar formed on the shaft, in particular a radially protruding collar, the hollow shaft having slits spaced apart from the collar, in particular axial slits, the ring comprising a chamfer, in particular on its inner face and/or at its annular opening and/or in particular in its axial end region facing the collar, such that the inner diameter of the ring in the axial region covered by the chamfer is greater than the inner diameter in the axial region in which the ring contacts the hollow shaft, and the ring comprises thickened regions, the ring having, in particular, in the region of the periphery angle covered by the thickened regions a greater radial width than in the other periphery angle regions.