Cantilevered Screw Assembly with Pivoting Torque Arm
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Solution Overview
Problem
Cantilevered screw assemblies used in various applications face instability and potential breakage due to substantial loads, leading to undesirable movements and costly repairs, with existing heavy-duty designs being larger, heavier, and more complex than needed for lighter-duty operations.
Innovation Solution
A cantilevered screw assembly incorporating a speed reducer connected to a torque arm that controls and limits undesired movements, eliminating the need for alternative drive systems and addressing issues like misalignment and fluid leakage, while being suitable for both light and heavy-duty applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a heavy duty chain and sprocket or hydraulic drive system is used to control loads on the screw, then the screw stability is improved, but the device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the complex chain and sprocket or hydraulic drive systems from the cantilevered screw assembly, retaining only the essential bearing assembly and shaft. This simplification removes unnecessary complexity while the bearing assembly continues to provide adequate support for the screw shaft, maintaining stability without requiring heavy-duty external drive mechanisms.
Solution Approach 2:
Instead of using complex external drive systems to control screw stability, the patent inverts the approach by using a simple bearing assembly that naturally supports the screw shaft. The bearing assembly is designed to accommodate normal operational loads and minor clearances, allowing the screw to remain stable through proper bearing selection and positioning rather than through complex active control mechanisms.
2Stability of the object's composition
If a heavy duty chain and sprocket or hydraulic drive system is used to control loads on the screw, then the screw stability is improved, but the weight increases
Solution Approach 1:
The patent removes the heavy chain and sprocket or hydraulic drive systems from the assembly, significantly reducing the overall weight. The simplified design relies on a lightweight bearing assembly and shaft configuration that provides adequate support for light to medium duty applications without the excessive weight of heavy-duty drive components.
3Stability of the object's composition
If clearances are allowed to develop within the bearing assembly due to loads, then the screw becomes unsteady, but eliminating clearances requires heavy duty components
Solution Approach 1:
The patent addresses clearance issues by carefully selecting bearing types and dimensions that are appropriate for the specific application's load requirements. For light to medium duty applications, standard bearing clearances are acceptable and do not require heavy-duty components. The bearing assembly is designed with proper clearance parameters that prevent excessive play while avoiding the complexity of preloaded or custom-tightened bearing arrangements.
Data Source
AI summary
A cantilevered screw assembly comprising a speed reducer to facilitate rotation of a screw. The speed reducer may be connected to a torque arm that is adapted to control or limit undesired movement (e.g., wobbling, orbital movement, etc.) of the screw during operation. In effect, one exemplary embodiment of a speed reducer may essentially float on a pivoting torque arm (and the shaft of the screw) such that the torque arm is adapted to limit undesired movement of the speed reducer and screw. As a result, an exemplary embodiment may eliminate the need for alternative drive systems or other means to control undesired movement of the screw. An exemplary embodiment may be particularly useful for light or infrequent duty or other small-scale applications to reduce the likelihood of a breakage of a screw or another portion of a cantilevered screw assembly (e.g., the bearing(s) or bearing assembly, the gears, etc.).