Chain-Driven Telescopic Adjuster for Long Stroke in Compact Space
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Solution Overview
Problem
Conventional telescopic adjusters with mechanical electric telescopic rods are limited by the length of the screw rod, requiring significant space for accommodation, which restricts their volume design due to the need for a longer screw rod for extended telescopic distances.
Innovation Solution
A telescopic adjuster design utilizing a telescopic rod assembly with a fixed tube and a driving tube, where a chain is wound around a gear driven by a motor, allowing the driving tube to extend or retract relative to the fixed tube, with limiting portions and guide tracks to control the movement and reduce volume by allowing the driving tube to be sleeved over the fixed tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a mechanical electric telescopic rod with a screw rod is used to achieve telescopic movement, then the telescopic rod can extend or retract, but the required space for accommodation increases with the screw rod length, limiting volume design
Solution Approach 1:
The patent applies nesting by placing the driving tube inside the fixed tube, and the chain inside the driving tube, creating a compact nested structure. This allows the telescopic mechanism to achieve extended length without proportionally increasing the accommodation volume, as the components are stacked concentrically rather than linearly.
Solution Approach 2:
The patent transitions from a linear screw rod structure to a rotational chain drive system. The chain is wound around a gear in a rotational dimension, allowing the telescopic motion to be achieved through rotational movement of the gear rather than linear extension of a screw rod, thereby reducing the linear space requirement.
2Adaptability or versatility
If a longer screw rod is used to achieve extended telescopic distance, then the telescopic range increases, but the volume design is restricted due to the need for large accommodation space
Solution Approach 1:
The driving tube is nested within the fixed tube, and the chain is nested within the driving tube, creating a compact multi-layer structure. This nesting allows the mechanism to achieve a long telescopic range when extended while maintaining a compact retracted volume that fits within a smaller housing.
Solution Approach 2:
The patent uses a dynamic chain-driven system where the chain can be wound around the gear for retraction and unwound for extension. This dynamic mechanism allows the telescopic range to be adjusted by the amount of chain unwinding rather than being fixed by the length of a rigid screw rod, providing versatility without proportional volume increase.
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 enables a telescopic adjuster with a reduced volume, as the length of the telescopic extension is determined by the chain length rather than the screw rod length, allowing for more compact configurations without compromising extension capabilities.
Implementation Method 1
The driving unit includes a first motor and a first gear, where the first motor is configured to drive the first gear to rotate
Implementation Method 2
the first gear drives the chain to push or pull the driving tube so that the driving tube extends or retracts relative to the fixed tube
Data Source
AI summary
The telescopic adjuster includes a telescopic rod assembly, a driving unit, and a chain. The telescopic rod assembly includes a fixed tube and a driving tube, where the fixed tube is sleeved over the driving tube or the driving tube is sleeved over the fixed tube, the fixed tube is fixed to a housing, and the driving tube can extend or retract relative to the fixed tube. The driving unit includes a first motor and a first gear, where the first motor is configured to drive the first gear. The chain has one end wound around the first gear and the other end fixed to a top end of the driving tube. When the first motor drives the first gear to rotate, the first gear drives the chain to push or pull the driving tube so that the driving tube extends or retracts relative to the fixed tube.