Motor-Controlled Telescopic Arm With Ball Screw Length Adjustment
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Solution Overview
Problem
Conventional multi-axis robot arms have limited adjustability and accuracy due to fixed telescopic distances, restricting their usage scope and causing unstable length adjustments when manually adjusted.
Innovation Solution
A modular telescopic arm by motor control, comprising a knuckle module, telescopic module, outer sleeve module, and inner sleeve module, utilizing a ball screw assembly and limiting ring to allow adjustable telescopic length in multiple sections, enabling precise lengthening and shortening based on user requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment is used for telescopic arm length, then ease of operation is improved, but manufacturing precision deteriorates due to inaccurate locking force causing unstable accuracy
Solution Approach 1:
The patent replaces the manual mechanical adjustment system with an automated motor control system. A motor drives a screw mechanism that precisely controls the telescopic shaft's movement, eliminating manual intervention while achieving high positioning accuracy through electronic control and feedback mechanisms.
Solution Approach 2:
The telescopic arm system incorporates self-locking mechanisms through the screw mechanism's inherent friction properties and additional locking elements. The system automatically maintains its position without requiring continuous manual force or external locking operations, achieving stable positioning through its own structural characteristics.
2Device complexity
If fixed telescopic distance is used in conventional robot arm, then device complexity is reduced, but adaptability deteriorates as usage scope is severely restricted
Solution Approach 1:
The patent transforms the static, fixed-length arm structure into a dynamic, adjustable system. The telescopic shaft can extend and retract along the telescopic tube, allowing the arm length to vary according to different operational requirements. This dynamic capability is controlled by a motor that adjusts the shaft position within a predefined range.
Solution Approach 2:
The arm structure is divided into separable components: a telescopic tube, a telescopic shaft, and connecting structures. This segmentation allows the inner shaft to move independently relative to the outer tube, enabling length adjustment while maintaining structural integrity through standardized connecting interfaces.
3Ease of manufacture
If only two fixed distances are set for telescopic arm, then ease of manufacture is improved, but adaptability deteriorates as arbitrary distance changes are not possible during usage
Solution Approach 1:
The patent enables continuous variation of the telescopic distance parameter within a defined range, rather than being limited to discrete fixed positions. The motor control system can adjust the shaft position to any point within the telescopic range, allowing flexible adaptation to different operational requirements while maintaining manufacturability through standardized components.
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
Enhances accuracy and expands the usage scope of the robot arm by allowing arbitrary adjustment of telescopic distances, improving stability and versatility during operation.
Implementation Method 1
The ball screw assembly has a screw shaft disposed longitudinally, and a nut disposed around the screw shaft. The nut is able to transversely slide along the screw shaft.
Data Source
AI summary
A modular telescopic arm by motor control includes a knuckle module, a telescopic module, an outer sleeve module and an inner sleeve module. The telescopic module is disposed to one end of the knuckle module. The telescopic module includes a ball screw assembly. The ball screw assembly has a screw shaft, and a nut disposed around the screw shaft. The nut is able to slide along the screw shaft. The outer sleeve module is mounted around the one end of the knuckle module. The screw shaft is longitudinally mounted in the outer sleeve module. The inner sleeve module is disposed to the one end of the knuckle module, and the inner sleeve module surrounds a part of the telescopic module. The outer sleeve module surrounds the inner sleeve module. One end of the inner sleeve module is fastened around the nut.