Retractable Mechanical Leg With Auxiliary Wheel for Obstacle Jumping
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Solution Overview
Problem
Wheeled mobile devices struggle to effectively navigate obstacles on uneven terrain due to limitations in their wheel-based movement systems.
Innovation Solution
A mechanical leg design incorporating a retractable member, extension and retraction driving member, travel driving member, auxiliary leg, and auxiliary wheel, which allows the device to jump over obstacles by combining forces from the retractable member and travel driving member, enhancing passage capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a wheel-based movement system is used, then the device can move efficiently on flat ground, but it cannot effectively overcome obstacles
Solution Approach 1:
The patent applies dynamics by making the mechanical leg structure adjustable and adaptable. The retractable member can extend and retract to change the leg's configuration, allowing the device to switch between wheel-based movement on flat ground and jump-based movement over obstacles. This dynamic reconfiguration enables the system to optimize its passage capability for different terrain conditions.
Solution Approach 2:
The mechanical leg is designed with multi-functionality to perform both rolling movement on flat ground and jumping over obstacles. By integrating the retractable member that can deform the leg structure, the same mechanical leg system handles both functions, eliminating the need for separate mechanisms for different terrain types.
2Adaptability or versatility
If the retractable member is extended to jump over obstacles, then passage capability is improved, but the device complexity increases
Solution Approach 1:
The retractable member is designed with a nested structure where the leg can be retracted into the body or frame of the device. This nesting approach allows the mechanical leg to be stored compactly when not in use and deployed when needed, reducing the overall device complexity while maintaining the jump capability.
3Adaptability or versatility
If the mechanical leg jumps over obstacles using the retractable member, then obstacle crossing capability is improved, but the stability during movement may be affected
Solution Approach 1:
The mechanical leg incorporates a cushioning mechanism that absorbs impact forces during landing after jumping over obstacles. This beforehand cushioning prepares the system for the impact event, dissipating energy and maintaining stability during and after the jump, preventing damage to the device and ensuring controlled movement.
Data Source
AI summary
A mechanical leg comprises a frame, a retractable member, a wheel, an extension and retraction driving member, a travel driving member, an auxiliary leg, and an auxiliary wheel. The extension and retraction driving member is located on a side of the frame. The retractable member is connected to the extension and retraction driving member. The wheel is connected to the retractable member. The wheel is further connected to the travel driving member. A first end of the auxiliary leg is connected to the auxiliary wheel, and a second end of the auxiliary leg is located on the frame. The retractable member extends under the driving of the extension and retraction driving member to drive the wheel to jump. The wheel is driven by the travel driving member to move. When the auxiliary wheel contacts the ground, the mechanical leg moves with the rolling of the wheel and the auxiliary wheel.