Railway Tamping Unit Height Adjustment for Irregular Sleeper Spacing
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Solution Overview
Problem
Existing tamping units with height-adjustable auxiliary drives are not suitable for tracks with irregular sleeper spacing, as the inner tamping tools must be spaced far apart for positioning, making them unsuitable for tracks requiring closer spacing.
Innovation Solution
The method involves activating the auxiliary drive of the non-lowering tamping unit to adjust the spacing of inner tamping picks, allowing for independent height adjustment and closer positioning of tamping tools when tamping a single sleeper, enabling tamping of tracks with irregular sleeper spacing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the inner tamping tools are spaced far apart to enable positioning movement in existing tamping units, then the tamping unit can handle track obstructions and tamp single sleepers, but the tamping unit becomes unsuitable for tracks with irregular sleeper spacing requiring closely spaced tamping tools
Solution Approach 1:
The patent applies the dynamics principle by making the tamping units height-adjustable through auxiliary drives. Each tamping unit can independently change its height position, allowing the inner tamping picks to be dynamically positioned at different spacings. This enables the system to adapt between closely spaced picks for irregular sleeper patterns and widely spaced picks for obstacle avoidance, resolving the contradiction between adaptability and device complexity.
Solution Approach 2:
The patent applies parameter changes by varying the height parameter of the tamping units through auxiliary drives. By changing the height parameter dynamically, the system can adjust the effective spacing of inner tamping picks during operation. This allows the same physical equipment to handle both closely spaced irregular sleepers and widely spaced obstacle scenarios without increasing structural complexity.
2Productivity
If both tamping units are lowered together for simultaneous tamping of two adjacent sleepers, then productivity is improved, but the ability to handle track obstructions and tamp single sleepers is reduced
Solution Approach 1:
The patent applies dynamics by enabling independent height adjustment of each tamping unit through auxiliary drives. This allows the system to dynamically switch between synchronized operation (both units lowered together for high productivity) and asymmetric operation (one unit raised to avoid obstacles). The independent height control resolves the contradiction between maintaining high productivity and adapting to track obstructions.
Solution Approach 2:
The patent applies segmentation by dividing the tamping system into two independently controllable tamping units, each with its own auxiliary drive for height adjustment. This segmentation allows one unit to operate while the other is raised to avoid obstacles, or both to operate simultaneously for maximum productivity. The independent control of each segment resolves the contradiction between productivity and adaptability.
3Adaptability or versatility
If the inner tamping picks are positioned close together for tracks with irregular sleeper spacing, then adaptability to irregular spacing is improved, but the positioning movement capability for obstacle avoidance is compromised
Solution Approach 1:
The patent applies dynamics by using auxiliary drives to enable dynamic height adjustment of tamping units. This allows the inner tamping picks to be positioned close together for irregular sleepers when needed, while the ability to raise entire units provides positioning movement capability for obstacle avoidance. The dynamic height control resolves the contradiction between close pick spacing and positioning capability.
Data Source
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Figure 4~6
AI summary
The invention relates to selectively tamping a single sleeper (8) by lowering only one of the two tamping units (5), the squeezing drives (15) of the tamping unit (4) not to be lowered are activated, said squeezing drives being associated with inner tamping tools (12). Thus, a spacing of the inner tamping picks (17) associated with the inner tamping tools (12) from the adjacent inner tamping picks (17) to be lowered of the tamping unit (5) to be lowered is achieved. Thus, the tamping unit (5) can be lowered without obstruction.