Ball Cart Frame Positioning Mechanism for Load Distribution
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Solution Overview
Problem
Conventional ball carts lack a positioning structure for the frame, leading to damage from weight-bearing sutures, limited carrying capacity, and inconvenience in folding and storing, resulting in a short service life and poor usability.
Innovation Solution
A ball cart structure featuring a frame with supporting rods, fork-like rod sets, and a positioning unit comprising a static element, insertion element, spring, sleeve, and operating element, which allows for secure positioning and easy folding by using sliding blocks and position-limiting protruding posts, along with a bag with flexible elements and positioning portions to distribute weight effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the bag contains plenty of balls, then the suture at the positioning corner ends bears the weight of the balls, but the suture tends to damage and sever, limiting the maximum carrying weight and reducing service life
Solution Approach 1:
The patent extracts the weight-bearing function from the suture by introducing a positioning structure consisting of positioning protrusions on the frame and positioning holes in the bag. This transfers the load from the suture to the rigid positioning structure, allowing the bag to carry more balls without the suture damaging or severing.
Solution Approach 2:
The patent employs curved reinforcement pieces with arc-shaped structures that are sewn onto the bag at the positioning portions. These curved structures distribute the stress more effectively and provide additional structural support, enhancing both the carrying capacity and durability of the bag.
2Volume of moving object
If the frame is folded and stored, then the frame can be compacted, but without a positioning structure the frame unfolds freely, requiring a storage sack and reducing ease of use
Solution Approach 1:
The patent implements a self-positioning mechanism where the frame automatically maintains its folded state through the interaction of positioning protrusions on the frame members and positioning holes. When folded, the protrusions engage with the holes to lock the frame in its compact configuration, eliminating the need for external storage sacks and making the folded state self-maintaining.
Solution Approach 2:
The patent applies positioning structures at specific locations on the frame members - positioning protrusions are provided on certain frame members while corresponding positioning holes are provided on other frame members. This localized application of positioning features enables the frame to be self-positioning only when folded, while maintaining flexibility during operation.
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
Enhances user safety and stability during operation, extends the service life of the ball cart by distributing weight evenly, and simplifies storage and folding, ensuring the cart remains secure and compact when not in use.
Implementation Method 1
a spring, with two ends of the spring abutting respectively against the shoulder portion and an abutting surface
Implementation Method 2
each fork-like rod set comprising two pivotal rods crossing each other and connecting pivotally to each other, with two ends of each said pivotal rod connecting pivotally to the supporting rod and the sliding block, respectively
Implementation Method 3
with each supporting rod provided slidably with a sliding block having an installation hole
Data Source
AI summary
A ball cart structure essentially includes a frame for positioning a bag and positioning units disposed on the frame. The positioning units position and restrict deformation of the frame when the frame is unfolded to be in use or is folded to be stored, to enhance the stability and user safety of the frame in use and render it convenient to store the frame.