Flexible Shaft Width Adjustment for Conveyor Guide Walls
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Solution Overview
Problem
Conventional conveyor systems lack precision and reliability in adjusting the width of guide rails to accommodate objects of varying sizes, often requiring additional locking mechanisms to prevent misadjustment and are prone to issues with pneumatic actuators such as leaks and flow rate variations.
Innovation Solution
A width adjustment device with a high-reduction mechanism using an endless screw and toothed wheel system, operated by a flexible shaft with a tension maintenance system, which eliminates the need for hydraulic or pneumatic means and reduces wiring, providing precise and irreversible adjustments without additional braking or blocking devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pinions and racks are used to adjust guide wall positions, then the adjustment mechanism is simple, but the precision and reliability of adjustment are insufficient
Solution Approach 1:
The patent replaces the traditional pinion-rack mechanical system with a flexible shaft directly connected to a guide wall positioning mechanism. This substitution eliminates the intermediate transmission components (pinions and racks) that limited precision, while maintaining mechanical simplicity. The flexible shaft provides direct actuation of the guide wall, ensuring both ease of manufacture and improved adjustment precision.
2Reliability
If additional locking mechanisms are added to prevent misadjustment, then the reliability of position maintenance improves, but the device complexity increases
Solution Approach 1:
The flexible shaft system inherently maintains the adjusted position of the guide wall without requiring additional locking mechanisms. The direct connection between the flexible shaft and the guide wall positioning mechanism creates a self-locking effect where the adjusted position is naturally maintained, eliminating the need for separate locking devices and thus avoiding increased complexity while improving reliability.
3Speed
If pneumatic actuators are used to adjust guide walls, then the adjustment speed improves, but reliability is affected by leaks and flow rate variations
Solution Approach 1:
The patent replaces pneumatic actuators with a mechanically-driven flexible shaft system. This substitution eliminates the reliability issues associated with pneumatic systems (leaks, flow rate variations) while maintaining adequate adjustment speed through direct mechanical actuation. The flexible shaft provides reliable, leak-free operation while achieving the necessary adjustment velocity for conveyor guide wall positioning.
4Measurement precision
If high-reduction mechanisms are used to improve positioning precision, then the initial positioning precision improves, but the device complexity and risk of breakdown increase
Solution Approach 1:
The patent extracts and eliminates complex high-reduction mechanisms from the adjustment system. Instead of using multiple gear stages or complex transmission systems, the invention employs a simple flexible shaft directly connected to the guide wall positioning mechanism. This extraction of unnecessary complexity achieves high positioning precision through direct actuation while minimizing the risk of breakdowns associated with complex mechanisms.
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 solution offers unparalleled precision in initial positioning, minimizes the risk of breakdowns, and reduces operational complexity, ensuring accurate adaptation to different object sizes without the limitations of conventional systems.
Implementation Method 1
a reduction torque with irreversible operation consisting of - said control shaft, in the form of an endless screw, and - a toothed wheel
Implementation Method 2
which tube (25) is movable relative to the frame (5) of the conveyor and which is held in position by means of an elastic member (21) of the prestressed spring type
Data Source
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AI summary
The invention relates to a width-adjusting device for conveyor corridor(s), comprising a wide gear-reduction mechanism connected to the frame (5) of said conveyor, wherein said mechanism is arranged between the control shaft (12) and the wall(s) of said corridor. The device includes: a final drive capable of reverse operation and consisting of said control shaft (12) in the form of an endless screw and of a toothed wheel (11); and a system for controlling at least one of the walls of said corridor, consisting of an endless screw (13) and a nut, the endless screw being mobile or fixed relative to said toothed wheel (11). The shaft (12) of the final drive is a flexible shaft having a long length and engaging with the tension-retaining system (20) for absorbing the pulling and pushing forces in the rotation direction thereof.