Fall protection device
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Solution Overview
Problem
Conventional fall protection devices fail to operate effectively in dusty environments due to dust adhesion on the pivoting connections of the braking block, which prevents the braking block from swinging and locking up the rotation unit, thereby failing to prevent falls.
Innovation Solution
The fall protection device incorporates a braking block with a pivot-joint part and a stopping part, where the stopping part is spun out by centrifugal force to abut against a stopper, and an abutted part moves along a specific path to ensure the braking block can pivotally swing, allowing the user to confirm operation and preventing further falls by limiting rotation when locked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the braking block is pivotally connected to the braking plate to enable swinging motion, then the braking block can lock up the rotation unit to prevent falls, but dust adhesion on the pivoting connection prevents the braking block from swinging and fails the lockup function
Solution Approach 1:
The patent extracts the harmful pivoting connection that accumulates dust and removes it from the system. Instead of having the braking block pivotally connected to the braking plate, the invention uses a sliding connection where the braking block moves along a guide surface on the braking plate. This eliminates the enclosed pivoting joint where dust would accumulate, allowing the braking block to slide freely even in dusty environments while maintaining the lockup function.
2Object-affected harmful factors
If a housing is added to isolate the fall protection device from dust, then protection from dust is improved, but dust is still brought into the housing by the safety belt and adheres to the pivoting connection
Solution Approach 1:
The patent removes the vulnerable pivoting connection from the system entirely, replacing it with a sliding mechanism. This eliminates the need for extensive dust isolation measures, as the sliding connection between the braking block and braking plate does not create enclosed spaces where dust can accumulate and cause failure.
3Ease of operation
If the braking block is designed to pivotally swing for operation confirmation, then users can check the device operates normally, but dust adhesion prevents the braking block from being spun out and fails the swing confirmation
Solution Approach 1:
The patent replaces the pivoting swing mechanism with a sliding motion along a guide surface. The braking block can still be manually pulled to confirm operation, but instead of pivoting, it slides along the guide surface on the braking plate. This sliding mechanism is not susceptible to dust adhesion, allowing reliable operation confirmation in dusty environments.
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 device ensures the braking block can pivotally swing and lock the rotation unit, effectively preventing falls by allowing users to check the device's operation and ensuring the braking block can engage the stopper to limit rotation, thus enhancing safety in dusty environments.
Implementation Method 1
The stopping part of the braking block can be spun out by a centrifugal force produced by a rotation of the braking plate to abut against the stopper to limit the rotation of the rotation unit
Data Source
AI summary
A fall protection device includes a frame, a rotation unit, a safety belt, and a braking unit. The rotation unit is rotatably disposed in the frame; the safety belt is wound up on the rotation unit, and adapted to be pulled to drive a rotation of the rotation unit. The braking unit includes a braking plate, a braking block, and a stopper. The braking plate is connected to the rotation unit, rotates with the rotation unit coaxially. The braking block is pivotally connected to the braking plate, and includes a stopping part. The stopping part of the braking block can be spun out by a centrifugal force produced by a rotation of the braking plate, and abuts against the stopper to limit the rotation of the rotation unit. The braking block includes an abutted part. The stopper is disposed in a movement path of the abutted part.