Anti-Rapid Drop Bicycle Rack Joint Mechanism
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Solution Overview
Problem
Conventional bicycle racks are prone to rapid drops when transitioning from a standing to an inclined position, posing a safety risk to users and potentially causing damage to the rack due to their significant weight.
Innovation Solution
An anti-rapid drop joint mechanism featuring a holder block with guiding holes and a swing assembly, including a hollow body, actuating rod, handle, interference members, and a spring, which allows the bicycle rack to stop halfway during the transition from standing to inclined, preventing sudden drops and ensuring safety and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the second coupling connects the main body of the entire bicycle rack, then the bicycle rack can support bicycles, but the entire bicycle rack has considerable weight causing rapid drop when changing position
Solution Approach 1:
The coupling structure is divided into a first coupling and a second coupling, with the second coupling being detachably connected to the first coupling. This segmentation allows the heavy second coupling to be separated from the main body when not in use, reducing the weight of the moving part while maintaining load bearing capacity when assembled
2Adaptability or versatility
If the second coupling is changed from vertical to horizontal position, then the coupling position can be adjusted, but the bicycle rack is likely to fall sharply causing injury or damage
Solution Approach 1:
The second coupling is designed with a limiting groove and limiting block that engage before the coupling reaches the horizontal position. This preliminary action prevents the coupling from freely falling to the horizontal position, controlling the movement and preventing sudden drops that could cause injury or damage
Solution Approach 2:
The limiting groove and limiting block act as intermediary elements between the second coupling and the upright stanchion. These intermediaries control the movement of the second coupling during position change, ensuring safe and controlled transition from vertical to horizontal position
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 anti-rapid drop joint effectively prevents the bicycle rack from falling directly from the standing to the most inclined position, thereby avoiding injuries and protecting the rack, making it safer and more durable by allowing controlled transitions.
Implementation Method 1
The spring has two ends abutting against the interference member and the mount respectively. The elastic restoring energy of the spring causes the interference member to move downward along with the actuating rod.
Data Source
AI summary
An anti-rapid drop bicycle rack and its joint in which the joint provides an anti-rapid drop function. The joint includes a holder block having two upright plates and a guiding hole on each upright plate, and a swing assembly including a hollow body, a mount, an actuating rod, a handle, an interference member and a spring. The bottom edge of each guiding hole defines a standing positioning groove at the front side, an inclined positioning groove at the rear side, and an intermediate positioning groove between the standing positioning groove and the inclined positioning groove. The interference member is elastically abutted against the groove bottom of one of the standing positioning groove, the inclined positioning groove and the intermediate positioning groove of each of the two guiding holes.