Telescopic Mast Sealed Winch Debris Binding
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Solution Overview
Problem
Existing field masts face issues such as mast sections binding during collapse, accelerated wear of open winch designs in dusty environments, pinch hazards, and fixed winch assemblies that hinder portability and storage.
Innovation Solution
A portable telescopic mast assembly with a serpentine lifting strap and retracting cable system, featuring a sealed winch transmission to prevent debris entry and facilitate easy detachment, allowing for adjustable speed reduction and improved portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an open design winch assembly is used for raising or lowering mast sections, then the mast can be operated manually, but debris accumulates on internal components causing accelerated wear-out
Solution Approach 1:
The patent applies a sealed housing enclosure around the winch assembly components (bearings, drums, gears, ratchet assemblies) to prevent debris entry. This sealing mechanism protects internal components from sand and dust accumulation, resolving the contradiction between manual operability and wear resistance in harsh environments.
2Ease of operation
If a fixed winch assembly is used in the mast, then the mast can be raised and lowered, but the transport weight increases and portability decreases
Solution Approach 1:
The winch assembly is designed as a detachable module that can be separated from the mast sections. This segmentation allows the winch to be removed during transport, reducing weight and improving portability, while still providing full mast elevation capability when deployed.
Solution Approach 2:
The winch assembly transitions from a fixed state during operation to a removable state during transport. This dynamic configuration allows the system to optimize between having the winch attached for mast elevation and detached for reduced weight and improved portability.
3Force
If a fixed input-to-output reduction ratio is used in the winch, then the mechanical advantage is determined, but either time is lost with excessive reduction or fatigue increases with inadequate speed reduction
Solution Approach 1:
The winch assembly incorporates an adjustable speed reduction mechanism that allows the operator to modify the input-to-output reduction ratio based on operational requirements. This enables optimization between mechanical advantage and deployment speed, reducing both time loss and operator fatigue.
Solution Approach 2:
The reduction ratio parameter of the winch can be changed or adjusted to match different operational conditions. This parameter adjustment capability allows the system to provide high mechanical advantage when needed while minimizing deployment time in other scenarios.
4Strength
If the mast sections are tightly fitted for structural integrity, then the mast is stronger, but debris becomes trapped between sections causing binding during collapse
Solution Approach 1:
The design extracts or removes debris-prone interfaces between mast sections by using a telescopic configuration where sections slide within each other rather than connecting at tight joints. This eliminates the trapping of debris that causes binding during collapse operations.
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 enables efficient and rapid deployment and collapse of the mast, reduces wear and safety hazards, and enhances portability by using a sealed winch system with adjustable speed, addressing the binding and wear issues of prior art masts.
Implementation Method 1
a sealed winch transmission to prevent debris entry
Implementation Method 2
A lifting cable is disposed between the plurality of mast sections. The lifting cable operatively connects the plurality of mast sections so as to urge one or more of the mast sections towards an extended position
Implementation Method 3
The transmission selectively couples the input to the first output and the second output
Data Source
Figure 1
Figure 1A
Figure 2
AI summary
A portable telescopic mast assembly with positive retraction for raising and lowering an associated device includes an outer body and plurality of mast sections slideably engaged with the outer body. A lifting cable is disposed between the plurality of mast sections. The lifting cable operatively connects the plurality of mast sections so as to urge one or more of the mast sections towards an extended position. The lifting cable includes a first end and a second end, the first end being secured to an inner most mast section of the pluralit of mast sections. A retraction cable is disposed at least partially inside the outer body. The retraction cable includes a first end and a second end, the first end being secured to the inner most mast section.