Rotator Driver Ring Isolating Rotor from External Loads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing rotators face challenges in operational reliability due to conflicts between radial force transfer in bearings between the stator and rotor, particularly under external loads, which can lead to stress and inefficiency.
Innovation Solution
A rotator design featuring a self-aligning driver ring with heel pairs arranged at a right angle, supported by a roller bearing, that transfers rotational movement without generating transverse forces, thereby isolating the rotor from external loads and reducing stress on its bearings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotor directly supports external loads through its bearing, then the bearing must handle both rotational support and external load transfer, but this causes conflict and stress between the rotor bearing and stator bearing systems
Solution Approach 1:
The patent divides the load transfer function from the rotor bearing system by introducing a separate fastening plate with its own bearing (D). The rotor bearing (B, C) exclusively handles rotational support between rotor and stator, while the fastening plate bearing (D) handles external load transfer to the stator. This segmentation eliminates the conflict between load transfer and rotational support functions, improving reliability without significantly increasing overall system complexity.
2Power
If the driver ring is rigidly connected to both rotor and fastening plate, then rotational movement is efficiently transferred, but transverse forces are generated that create stress in the bearing system
Solution Approach 1:
The driver ring is designed with dynamic adaptability through heel pairs (81-84) that can laterally shift within oversized recesses (91-94). This allows the driver ring to dynamically adjust its position to accommodate radial variations and bearing play, maintaining effective rotational power transfer while avoiding the generation of harmful transverse forces that would create bearing stress. The dynamic adjustment capability eliminates the stress problem while preserving power transfer efficiency.
3Ease of operation
If the bearing system is designed to handle radial variations and play, then operational smoothness is improved, but the structure becomes more complex
Solution Approach 1:
The patent addresses radial variations and bearing play by designing oversized recesses (91-94) that are larger than the heel pairs (81-84). This parameter change in the geometric dimensions allows the heel pairs to laterally shift within the recesses, accommodating radial variations and bearing play. This simple dimensional adjustment improves operational smoothness without adding complex structures, mechanisms, or components to the system.
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 ensures the rotor and its bearings operate effectively without conflict, maintaining low stress and reliability even under external overloads, with the self-aligning driver ring effectively managing radial variations and play in the bearing system.
Implementation Method 1
The driver ring (80) is arranged for supporting a rotatable work tool (not shown) directly or via an intermediate fastening (not shown), whereby a number of fastening holes (51) are arranged in the fastening plate for this purpose.
Data Source
AI summary
The invention relates to a method and an arrangement related to a rotator, especially for a work tool supported by an arm, whereby the rotator (10) comprises a stator (20) and a rotor (30). A fastening ring (50) for the attaching of a work tool is separately journalled (D) relative to the stator (20) independently of a bearing (B, C) between the stator (20) and the rotor (30). A driver (80; 180; 280) is used to transfer the rotational movement of the rotor (30) to the fastening ring (50).