Foldable Electric Golf Trolley With Side-Folding Rear Wheel Linkage
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Solution Overview
Problem
Existing electric golf trolleys occupy a large space when folded due to the unfoldable drive shaft and rear wheels, which increases the size and storage requirements.
Innovation Solution
A foldable electric golf trolley design where connecting rods and wheels on the frame are folded on the sides of the frame, with a lower main tube rotating to synchronize the folding of these components, utilizing bevel gears and locking mechanisms to secure the unfolded or folded state, and incorporating an intra-wheel power system for mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drive shaft is used to transmit torque to rear wheels, then the electric golf trolley achieves mobility, but the drive shaft and rear wheels become unfoldable, increasing the size of the folded trolley
Solution Approach 1:
The drive shaft is divided into multiple segments that can be folded relative to each other. The rear wheels are separated from the main frame through foldable connecting rods, allowing the wheel assembly to be segmented and folded independently, reducing the overall folded volume while maintaining mobility capability.
Solution Approach 2:
The connecting rods connecting the frame to rear wheels are designed as foldable dynamic structures rather than fixed rigid connections. These connecting rods can change their configuration from extended to folded states, enabling the rear wheel assembly to adapt its volume dynamically while preserving the torque transmission function for mobility.
2Reliability
If drive shaft and rear wheels are made unfoldable, then torque transmission is maintained, but the occupation space increases
Solution Approach 1:
The connecting rods are designed to nest or fold alongside the frame structure when folded. The rear wheel assembly can be positioned closer to the frame through nested folding arrangements, reducing the horizontal occupation space while maintaining the vertical torque transmission path through the foldable connecting rods.
3Volume of moving object
If connecting rods and wheels are folded on the sides of the frame, then the folded size is reduced, but complex locking mechanisms are required to maintain stability
Solution Approach 1:
The locking mechanisms are designed to automatically engage when the connecting rods and wheels are folded into position. Spring-loaded locking pins or cam-based automatic locks utilize the folding motion itself to trigger the locking action, eliminating the need for manual intervention or complex control systems while maintaining stability in the folded state.
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 effectively reduces the size of the folded trolley, making it more convenient to store and transport, while maintaining stability and mobility through synchronized folding and locking mechanisms, and utilizing a compact intra-wheel power system for efficient operation.
Implementation Method 1
bevel gears I are arranged on two sides of a lower end of the lower main tube respectively, bevel gears II meshing with the bevel gears I are arranged at one ends of the connecting rods towards the frame
Implementation Method 2
a locking pin is arranged at the lower end of the lower main tube; and the locking pin is located in the locking bayonet, to lock an unfolded state or a folded state of the lower main tube
Implementation Method 3
the intra-wheel power system includes an electric motor and a worm wheel meshing with an output worm of the electric motor
Implementation Method 4
the intra-wheel power system includes an electric motor and a worm wheel meshing with an output worm of the electric motor, and a spindle of the worm wheel is connected to a wheel hub corresponding to the intra-wheel power system
Data Source
AI summary
The present disclosure relates to a foldable electric golf trolley. When the electric golf trolley is folded, connecting rods on two sides of a frame of the electric golf trolley and wheels connected to the connecting rods are folded on the two sides of the frame. When the electric golf trolley in the present disclosure is folded, two rear wheels and connecting rods used for connecting the frame and the rear wheels can be folded on the two sides of the frame, such that an entire size of the folded electric golf trolley is effectively reduced, and the electric golf trolley is smaller in occupation space and more convenient to move and store.