Cable Guide Link Frame with Sealed Pin Holes
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Solution Overview
Problem
Conventional cable protection and guide devices require excessive labor and risk damage due to mismatched connecting pin sizes, struggle with miniaturization, and are prone to foreign substance ingress and disengagement issues.
Innovation Solution
The device employs link frame bodies with integrally molded bottom plate-shaped arms and lid-shaped connecting arms that allow for secure and easy assembly, featuring blind connecting pin holes and a disengagement prevention mechanism, along with a filling member to seal the cutout opening portions and prevent foreign substances from entering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inner width of the connecting pin hole side of a preceding link frame body is made smaller than the outer width of the connecting pin side of the subsequent link frame body, then the connecting pin can be inserted, but a large force is required to connect the link frame bodies, requiring considerable labor and causing damage and breakage
Solution Approach 1:
The patent changes the dimensional parameters of the connecting pin and connecting pin hole to achieve proper fit. Specifically, the inner width of the connecting pin hole is made equal to or slightly larger than the outer width of the connecting pin, eliminating the need for excessive force during assembly while ensuring reliable connection.
2Volume of moving object
If the cable protection and guide device is miniaturized, then the device size is reduced, but thickening of the link plate or lengthening of the connecting pin cannot be easily performed, and tensile strength and deflection rigidity cannot be sufficiently ensured
Solution Approach 1:
The patent employs glass fiber reinforced polyamide resin as a composite material for manufacturing the link plates and connecting pins. This allows miniaturization of the device while maintaining sufficient tensile strength and deflection rigidity, as the composite material provides high strength-to-weight ratio and structural integrity even in reduced sizes.
3Object-affected harmful factors
If the connecting pin hole is blindly formed and sealed on the outer surface side of the link plate, then foreign substances such as dust cannot enter the connecting pin hole, but when the inner width of the link frame body is narrow and a small connecting pin hole is required, the connecting pin hole cannot be formed in a blind hole due to mold structure limitations
Solution Approach 1:
The patent introduces a filling member that is inserted into the connecting pin hole from the inner circumferential side of the link frame body. This approach allows the connecting pin hole to be formed as a blind hole for sealing against foreign substances, while the filling member provides the necessary structural support that would otherwise require a through-hole, thus resolving the mold structure limitation.
4Reliability
If a disengagement prevention mechanism is added to prevent connecting pin disengagement, then connection reliability is improved, but device complexity increases
Solution Approach 1:
The patent integrates the disengagement prevention function into the connecting pin and connecting pin hole structures themselves. The connecting pin is designed with a head portion that abuts against the inner surface of the link plate, and the connecting pin hole is positioned to receive and retain the pin, thereby preventing disengagement without requiring separate additional components or mechanisms.
Data Source
AI summary
A cable protection and guide device in which disengagement of a connection pin from a connecting pin hole is prevented. A cable protection and guide device in which a number of link frame bodies are flexibly and sequentially connected to each other such that a connecting pin of a preceding link plate is inserted into a connecting pin hole of the subsequent link plates. Cutout opening portions reside in the link plates. Connecting pins are inserted into the connecting pin hole 114. The connecting pins pass through a cutout portion of the side plate. Cutout opening portions in the link plates communicate with the connecting pin holes. A filling member integrally formed in the lid-shaped connecting arm seals against the connecting pin.