Electric Wheelchair Frame Swayable Power Support
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Solution Overview
Problem
Existing electric wheelchair frames experience instability and discomfort due to vibration and impact from bumpy roads, and risk of tipping on steep slopes, as they fail to effectively absorb shocks and maintain a stable center of gravity.
Innovation Solution
The electric wheelchair frame incorporates a swayable power support and connecting rod system with shock absorbers and stabilizing rollers, providing a three-point contact with the ground and independent movement of wheels to absorb impacts and maintain stability, along with a buffering module to reduce vibrations and prevent tipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the wheel assembly uses a fixed rigid connection to the frame, then the structural strength is improved, but the vibration and impact forces are directly transmitted to the frame causing large vibrations and discomfort
Solution Approach 1:
The patent applies the dynamics principle by making the power support swayable relative to the frame and the connecting rod pivotable relative to the power support. This dynamic linkage allows the wheel assembly to move independently in response to road conditions, absorbing vibrations and impacts before they reach the frame, thus resolving the contradiction between structural strength and vibration transmission.
Solution Approach 2:
The patent uses the power support and connecting rod as intermediary elements between the wheel assembly and the frame. These intermediaries act as buffers that absorb and dissipate vibration and impact forces, preventing direct transmission to the frame while maintaining structural integrity through the linkage mechanism.
2Object-affected harmful factors
If the guiding wheels are allowed to sway freely to provide buffering effect, then the comfort is improved, but the frame stability deteriorates due to excessive lifting on steep slopes and sideways swaying
Solution Approach 1:
The patent applies dynamics by enabling controlled movement of the power support and connecting rod through pivotal connections. This allows the system to adapt dynamically to terrain changes while maintaining stability through the geometric constraints of the linkage mechanism, preventing excessive lifting and sideways swaying.
Solution Approach 2:
The patent segments the wheel assembly into multiple independent movable components (power support, connecting rod, guiding wheels). Each segment can move independently to absorb shocks while the overall linkage structure maintains frame stability through coordinated movement, resolving the contradiction between comfort and stability.
3Object-affected harmful factors
If the power support and connecting rod are made swayable to absorb impacts, then the vibration absorption is improved, but the device complexity increases
Solution Approach 1:
The patent achieves vibration absorption through simple dynamic linkages (swayable power support and pivotable connecting rod) rather than complex active control systems. The pivotal connections allow natural movement to absorb impacts, providing effective vibration damping with minimal added complexity.
Solution Approach 2:
The patent employs self-service principles where the swayable power support and pivotable connecting rod automatically adjust their positions in response to road conditions without external control. The system uses its own structural flexibility to absorb impacts, eliminating the need for complex active damping mechanisms.
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 solution significantly enhances stability and comfort by ensuring continuous ground contact and absorbing road impacts, reducing vibrations and preventing frame tilting, thereby improving user experience on various terrains.
Implementation Method 1
The electric wheelchair frame incorporates a swayable power support and connecting rod system with shock absorbers and stabilizing rollers, providing a three-point contact with the ground and independent movement of wheels to absorb impacts and maintain stability
Implementation Method 2
The electric wheelchair frame incorporates a swayable power support and connecting rod system with shock absorbers and stabilizing rollers, providing a three-point contact with the ground
Data Source
AI summary
An electric wheelchair frame includes a frame and a power support swayably connected to a frame. A connecting rod is swayably connected to the frame, is pivotably connected to the power support, and is movable relative to the power support in a longitudinal direction. A driving device includes a connecting seat and a power output unit. The connecting seat is pivotably mounted to the power support. The power output unit is fixed to the connecting seat and includes a driving shaft extending away from the frame and a driving wheel. When the driving wheel is moving on a bumpy road, the pivotal movement between the connecting seat and the power support increases the sitting comfort of a user in an electric wheelchair.