Inverted Pendulum Vehicle Hollow Shaft Assembly
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Solution Overview
Problem
The conventional inverted pendulum type vehicle has a complex structure due to the need to connect individually rotating left and right driving disks and a main wheel, with the electric motor positioned inside the wheel, complicating power transmission and assembly.
Innovation Solution
The vehicle features a hollow shaft member supporting the driving disks for individual rotation, a fastening member to secure them axially, and a supporting shaft attaching to the vehicle body frame, along with pulley systems and ball bearings to simplify the structure and improve assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the electric motor is disposed within the wheel as a wheel motor, then the driving force is directly transmitted to the driving disks, but the structure becomes complicated and the power transmission system becomes complex
Solution Approach 1:
The electric motor is extracted from the wheel interior and positioned externally on the vehicle body frame. This separation removes the complexity of fitting the motor within the wheel while maintaining direct power transmission capability through the simplified external mounting configuration.
2Adaptability or versatility
If the left and right driving disks are connected for relative rotation, then the driving disks can rotate individually, but the structure becomes complicated
Solution Approach 1:
The driving disk assembly is segmented into left and right independent driving disks that can rotate individually. Each driving disk is supported separately on the hollow shaft member, allowing independent rotation while simplifying the overall connection structure by eliminating complex inter-connection mechanisms.
Solution Approach 2:
Instead of connecting the driving disks through complex linkages to enable individual rotation, the invention inverts the approach by supporting each driving disk independently on the hollow shaft member, allowing natural individual rotation without complex connection structures.
3Ease of manufacture
If the driving disks are unitized with the main wheel, then assembly is simplified, but maintenance becomes difficult
Solution Approach 1:
The unitized structure is segmented by making the hollow shaft member removable from the vehicle body frame. This allows the driving disks to be assembled with the main wheel as a unit for simplified manufacturing, while the removable shaft enables easy disassembly for maintenance and repair operations.
Solution Approach 2:
The hollow shaft member is designed with dynamic characteristics that allow it to be fixed during operation for simplified assembly, but removable when maintenance is needed. This dynamic configuration enables the structure to transition between assembly and maintenance modes.
4Device complexity
If the hollow shaft member supports the driving disks for individual rotation, then the structure is simplified, but precise positioning in the axial direction becomes challenging
Solution Approach 1:
The hollow shaft member incorporates self-positioning features such as shoulders or stops that automatically locate the driving disks in the axial direction during assembly. This self-service mechanism ensures precise axial positioning without requiring complex external positioning systems, maintaining both structural simplicity and manufacturing precision.
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
This configuration results in a simpler, more accurate, and maintainable structure with reduced friction resistance, allowing for easier assembly and improved power transmission efficiency.
Implementation Method 1
reduces friction through ball bearings
Data Source
AI summary
Assembling workability of driving disks to a vehicle body frame, and setting a spacing dimension of left and right driving disks in an axial direction with high accuracy to stabilize a traveling performance of an inverted pendulum type vehicle. The left and right driving disks are assembled to a hollow shaft member in a positioned state in an axial direction to form a subassembly. The hollow shaft member is fixed to a vehicle body frame by a bolt inserted in a central through-hole of the hollow shaft member.