Lever-Steerable Sledge Runners with Segmented Linkage Control
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Solution Overview
Problem
Existing snow sledges with three supports lack precise mechanisms for steering, making them difficult to control direction and speed effectively on snowy terrain.
Innovation Solution
A sledge design featuring lever-steerable runners, comprising three sections each, with a control lever system that includes cranks, connecting rods, and a slide mechanism to rotate the runners, allowing for directional control and speed management through manual lever operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple three-support sledge design is used, then the structure is simple and easy to manufacture, but the steering precision and controllability are poor
Solution Approach 1:
Each runner is divided into three sections (front runner, central runner, rear runner) that can rotate independently relative to each other. This segmentation allows precise directional control of each runner section while maintaining the overall simplicity of the sledge structure, resolving the contradiction between structural simplicity and steering precision.
2Measurement precision
If lever-steerable runners with multiple sections are used, then steering precision and controllability are improved, but the device complexity increases
Solution Approach 1:
The control levers are merged with the runner rotation mechanism through cranks and connecting rods. The levers directly control the rotation of runner sections by engaging with crank mechanisms, integrating the control function into the runner structure itself. This merging reduces the need for separate complex steering mechanisms while maintaining high steering precision.
Solution Approach 2:
The runner sections are designed to be dynamically adjustable rather than fixed. Each runner section can rotate dynamically in response to lever input, allowing real-time adjustment of direction and speed. This dynamic capability provides precise controllability without requiring overly complex static mechanisms.
3Adaptability or versatility
If the runners can rotate in multiple directions independently, then the maneuverability and speed control are enhanced, but the structural complexity increases
Solution Approach 1:
Each runner is segmented into three rotatable sections that can be independently controlled. This segmentation enables complex maneuvers (turning, braking, directional changes) by coordinating the rotation of different sections, achieving high maneuverability while keeping each individual section structurally simple.
Solution Approach 2:
The same basic runner section structure is used throughout, with each section capable of performing multiple functions (steering, braking, speed control) through differential rotation. This universal design approach enhances versatility without proportionally increasing structural complexity, as the same components serve multiple purposes.
Data Source
Figure 1
AI summary
A sledge with lever-steerable runners, comprising a pair of runners, one on each side of the sledge, each one comprising three sections: a front runner (1), a central runner (2), a rear runner (3) and a control lever on both sides of the sledge (8). On the front and rear runners (5 and 10) it also comprises a crank, a connecting rod (6 and 9) and a slide (7) on its left and right sides as well as a shell (11) and a seat (12), the lever having a gearwheel and the slide having a rack.