Wheel-Integrated Worm Drive for Foldable Golf Trolley Power
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Solution Overview
Problem
Existing electric golf bag trolleys have a large size and weight due to the power system being bulky and heavy, and the wheels lack a deceleration function, posing safety concerns on uneven terrain and hindering folding and storage convenience.
Innovation Solution
A wheel built-in power system with a brushless motor, worm gear, and worm wheel for direct torque transmission to the wheel hub, incorporating a parking assembly and heat-radiating features to ensure compactness, safety, and ease of folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the power system is disposed in the trolley body and connected to wheels through connecting rods, then the wheels can be driven to rotate, but the trolley becomes large in size and heavy in weight, and the connecting rods and wheels cannot be folded
Solution Approach 1:
The patent merges the power system directly into the wheel hub, combining the motor, transmission mechanism, and wheel into an integrated unit. This eliminates the need for separate connecting rods and allows the wheel to fold with the trolley body, significantly reducing the folded size and improving portability while maintaining the driving function.
2Device complexity
If a hub motor is installed in the wheel for direct driving, then the structure is simplified, but the hub motor lacks deceleration function and safety cannot be guaranteed on uneven terrain
Solution Approach 1:
The patent combines a deceleration mechanism (worm gear and worm wheel) directly into the hub motor structure, creating an integrated power unit that provides both direct driving and deceleration functions. This merging allows the system to maintain simplicity while ensuring safety and reliability on uneven golf course terrain through effective torque control.
Solution Approach 2:
The patent introduces a worm gear as an intermediary mechanism between the motor and the wheel hub. This worm gear provides the necessary deceleration and torque multiplication, acting as a mediator that enables the hub motor to deliver controlled, high-torque output suitable for uneven terrain while maintaining a compact structure.
3Volume of moving object
If the power system is made compact for easy folding, then the folding size is reduced, but the transmission mechanism becomes complex
Solution Approach 1:
The patent segments the transmission mechanism into a compact, integrated module within the wheel hub, separating it from the main trolley body. This segmentation allows the power system to be contained within a small volume, enabling easy folding while maintaining a simple transmission design through modular construction.
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 system reduces the trolley's size and weight, provides efficient deceleration and self-locking capabilities, enhances safety on uneven terrain, and allows wheels to fold during storage, improving mobility and convenience.
Implementation Method 1
a worm gear engaged with an output worm of the motor, a spindle of the worm gear being connected to a hub of any wheel
Implementation Method 2
the parking assembly includes a friction plate connected to the output worm, and a brake pad capable of locking the friction plate
Implementation Method 3
a heat-radiating cavity is disposed outside the motor, a plurality of heat-radiating fins are disposed inside the heat-radiating cavity
Implementation Method 4
a plurality of heat-radiating fins are disposed inside the heat-radiating cavity
Data Source
AI summary
The present disclosure relates to a wheel built-in power system for an electric golf bag trolley, including a motor, and a worm wheel engaged with an output worm of the motor, a spindle of the worm wheel being connected to a hub of any wheel of the electric golf bag trolley. The wheel built-in power system for an electric golf bag trolley of present disclosure is small in size and light in weight, and can be installed in wheels of an electric golf bag trolley, thereby effectively reducing the size of the electric golf bag trolley after being folded, facilitating movement and storage.