Tilting Screw Actuator Support for Deforming Equipment Frames
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Solution Overview
Problem
Electric cylinders in construction equipment are sensitive to induced efforts and shocks, leading to reliability and robustness issues due to framework deformation during operation, and existing solutions like reinforced frameworks increase weight and cost.
Innovation Solution
The threaded rod is designed to tilt automatically to compensate for framework deformation, maintaining optimal alignment with guiding means and ensuring the roller or ball screw system operates efficiently, reducing the risk of damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the framework is reinforced to avoid deformation, then the reliability of the actuator is improved, but the weight and cost of the machine increase
Solution Approach 1:
The support element is designed to allow the threaded rod to tilt dynamically in response to framework deformation, transforming a static rigid connection into a dynamic adaptive one. This enables the actuator to maintain optimal alignment without requiring a heavier reinforced framework
Solution Approach 2:
The support element changes the geometric parameter (alignment angle) of the threaded rod automatically in response to framework deformation, allowing the system to adapt to varying conditions without structural reinforcement
2Reliability
If the framework is reinforced to avoid deformation, then the reliability of the actuator is improved, but the cost of the machine increases
Solution Approach 1:
The dynamic tilting capability provided by the support element offers a cost-effective alternative to expensive framework reinforcement, maintaining actuator reliability through adaptive alignment rather than structural over-engineering
3Manufacturing precision
If the threaded rod is fixed rigidly, then the manufacturing precision is improved, but the reliability decreases due to misalignment from framework deformation
Solution Approach 1:
The support element introduces controlled dynamic adjustment capability that compensates for manufacturing tolerances and framework deformation, achieving both precision and reliability
Solution Approach 2:
The threaded rod automatically adjusts its own alignment through the tilting support element in response to framework deformation, eliminating the need for external compensation mechanisms
Data Source
AI summary
Construction equipment includes a framework and at least one electric actuator for moving at least one element of the framework. The actuator includes a ball or roller screw system having a threaded rod and a nut forming a helical connection with the threaded rod. An electric motor drives the rod in rotation around a longitudinal axis, forcing the nut to move axially along the rod. A carriage is axially connected with the nut. An axial guide guides the movement of the carriage. The guide is fixed to the framework. At least one support element connects, directly or indirectly, the threaded rod to framework. The support element is designed so that threaded rod can tilt, to some extent, relative to framework around any axis perpendicular to rod longitudinal axis.