Trolley Bag Chassis With Flip-Down Support Frame for Four-Wheel Pulling
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Solution Overview
Problem
Existing golf bag trolleys require significant manual labor for transportation due to the need for continuous upward force to maintain a tilted state, especially inconvenient for users with limited strength.
Innovation Solution
A trolley bag chassis with a flip-down support frame and support wheels, allowing the frame to be flipped down by gripping a gripping rod and pulling it downward, retracting the positioning portion into a fixed sleeve body, and flipping out to be supported by four wheels for horizontal movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the trolley bag is tilted for movement with two wheels supporting, then the bag can be transported, but continuous upward force is required from the user resulting in significant manual labor
Solution Approach 1:
The support frame is designed to be dynamically adjustable between a retracted state (during storage/transport) and an extended state (during loading/unloading). The frame can be flipped down from the vertical groove to provide additional support, transforming the static two-wheel support into a dynamic four-point support system that reduces the need for continuous upward force
Solution Approach 2:
The support frame acts as an intermediary structure between the trolley chassis and the ground. When flipped down, it provides additional contact points with the ground through the support wheel, distributing the load and reducing the upward force required from the user during operation
2Ease of operation
If the support frame is extended to provide support, then operational effectiveness is improved, but the frame occupies more space when not in use
Solution Approach 1:
The support frame is designed to nest within the vertical groove of the trolley chassis when not in use. The frame can be fully retracted into the groove, minimizing its occupied space during storage and transport, while allowing quick deployment when needed for operational support
3Ease of operation
If the support frame is made easily retractable by pulling the gripping rod, then ease of operation is improved, but the positioning mechanism becomes more complex
Solution Approach 1:
The positioning portion is designed with self-locking and self-release features. When the gripping rod is pulled down, the positioning portion automatically disengages from the fixed sleeve body through a cam or lever mechanism, allowing the support frame to flip down under its own weight without requiring additional actuators or complex control systems
Solution Approach 2:
The positioning mechanism operates in periodic cycles: engaged position (during normal transport) and disengaged position (during loading/unloading). The gripping rod triggers a quick transition between these two states, allowing the user to switch between compact and operational modes with a simple pulling motion
Data Source
AI summary
Disclosed is a trolley bag chassis, including a trolley chassis. Left and right sides of a lower portion of a rear wall surface of the trolley chassis are pivotally connected with bottom wheels via hinge shafts. A frame mounting groove is formed on the rear wall surface of the trolley chassis. A support frame is sleeved in the frame mounting groove and cooperates with the frame mounting groove. An upper portion of the support frame is pivotally connected to the trolley chassis via a hinge shaft. A support wheel is installed at a bottom of a vertical support tube of the support frame. The frame mounting groove includes left and right vertical grooves extending vertically. Wheel placement grooves are formed on the rear wall surface of the trolley chassis at bottom ends of the vertical grooves.