Foldable Trolley Frame with Hinged Support Rods for Load Distribution
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Solution Overview
Problem
Existing foldable trolleys have poor load-bearing capacity and are prone to damage from long-term load bearing, which limits their effectiveness in carrying heavy loads.
Innovation Solution
A foldable trolley design featuring a frame with hinged support rods and rotating wheels, where the support rods are positioned beneath the foldable bottom frames to distribute load and provide additional bearing capacity, and can be folded for space-saving storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the trolley is designed as foldable to reduce space occupation, then the space efficiency is improved, but the load-bearing capability deteriorates
Solution Approach 1:
The bottom frame is divided into multiple bottom frame members that can be folded relative to each other. The support rods are segmented into multiple sections that can be telescoped or folded. This segmentation allows the trolley to collapse into a compact form for storage while maintaining structural integrity when extended for load-bearing operations.
Solution Approach 2:
The trolley employs dynamic structural elements including telescopic support rods with locking mechanisms, hinged bottom frame members, and collapsible side frames. These dynamic components allow the trolley to transition between a compact folded state for storage and an extended stable state for load-bearing, adapting its configuration based on operational requirements.
2Productivity
If the foldable part is used for long-term load bearing, then the carrying function is maintained, but the structural integrity deteriorates due to denting or damage
Solution Approach 1:
The patent incorporates reinforcing ribs on the bottom frame members, strengthening plates at critical stress points, and protective coatings on the support rods. These preemptive structural enhancements are designed to distribute and absorb stresses before they can cause denting or damage, ensuring the foldable components maintain their integrity during long-term load-bearing operations.
Solution Approach 2:
The trolley utilizes composite construction combining different materials with complementary properties - such as steel support rods for strength, aluminum alloy bottom frame members for durability and weight reduction, and polymer coatings for corrosion resistance. This composite approach creates a structure that maintains reliability under repeated loading while resisting environmental degradation.
3Strength
If support rods are added beneath the bottom frames for load bearing, then the load-bearing capacity is improved, but the device complexity increases
Solution Approach 1:
The support rods serve multiple functions: they provide load-bearing capacity when extended, act as structural支撑 during folding operations, and can be locked at intermediate positions for partial load scenarios. The bottom frame members simultaneously serve as load-bearing elements and as the folding mechanism itself. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in overall structural complexity.
Solution Approach 2:
The patent merges the support function with the frame structure itself - the bottom frame members and side frames double as load-bearing elements rather than requiring entirely separate support structures. The support rods are integrated into the existing frame geometry, sharing connection points and structural pathways with the foldable mechanism, thus combining multiple functions into unified components rather than adding independent systems.
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 design significantly enhances the load-bearing capacity of the trolley, preventing damage from heavy loads and allowing for efficient folding and unfolding, thus improving usability and durability.
Implementation Method 1
a foldable frame; comprising a front side frame, a rear side frame, a first foldable bottom frame and a second foldable bottom frame, the first foldable bottom frame is hinged with the second foldable bottom frame
Implementation Method 2
an end of the first support rod which is away from the second support rod is rotatably connected with the front side frame
Implementation Method 3
a top of the first support rod is provided with a first bearing block, a top of the second support rod is provided with a second bearing block, and the first bearing block and the second bearing block are configured for bearing the first foldable bottom frame and the second foldable bottom frame
Implementation Method 4
two first convex pieces are arranged spaced apart on the top of the first bearing block, the first foldable bottom frame is provided with a first locating rod, and the first locating rod is configured to be clamped between the two first convex pieces when the first foldable bottom frame is unfolded
Implementation Method 5
a first rotating wheel is rotatably arranged at the bottom of the front side frame; and a second rotating wheel is rotatably arranged at the bottom of the rear side frame
Data Source
AI summary
A foldable trolley, including a foldable frame, a first support rod, a second support rod hinged to the first support rod, a first rotating wheel and a second rotating wheel. The foldable frame includes a front side frame, a rear side frame, a first foldable bottom frame and a second foldable bottom frame. The first foldable bottom frame and the second foldable bottom frame can be folded and unfolded. The first support rod and the second support rod are located below the first foldable bottom frame and the second foldable bottom frame, and are configured for bearing the first foldable bottom frame and the second foldable bottom frame. The first rotating wheel is rotatably arranged at a bottom of the front side frame, and the second rotating wheel is rotatably arranged at a bottom of the rear side frame.