Tamping Machine Lifting Roller Pivot Mechanism
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Solution Overview
Problem
Existing tamping machines face challenges in efficiently compacting ballast under switches due to the limitations of traditional lifting and straightening devices, which often result in damage to the roller, rail fastenings, and increased maintenance time, especially when dealing with varying rail heights and obstacles like rail joints and weld beads.
Innovation Solution
The lifting and straightening device features a console mounted on a guide carriage that can pivot about a longitudinal axis, allowing the lifting roller and hook to be individually height-adjustable and rotatable, enabling them to move transversely and vertically, thus avoiding conflicts with rail fastenings and maintaining contact during high-speed operation. This design includes hydraulic cylinders for vertical and horizontal movement, along with sensors for automated operation and overload protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the lifting roller is fixed in position transverse to the track, then the structure is simple, but the roller cannot adapt to varying rail head heights and may tear out or derail
Solution Approach 1:
The lifting roller is made rotatable about its own axis in addition to being movable transversely. This dynamic capability allows the roller to adapt to varying rail head heights and conditions, preventing it from being forced open or tearing out while maintaining reliable contact with the rail
Solution Approach 2:
The lifting roller assembly is separated into independently controllable components: the roller can rotate about its axis while the entire assembly moves transversely. This segmentation allows each degree of freedom to be optimized independently for both simplicity and reliability
2Reliability
If the roller tongs are manually adjusted when worn or when rail head heights vary, then the roller can maintain contact, but this requires significant time and expense
Solution Approach 1:
The lifting roller is equipped with automatic height adjustment capability through transverse movement and rotation, eliminating the need for manual adjustment. The roller automatically adapts to varying rail head heights and wear conditions, maintaining reliable contact without operator intervention
Solution Approach 2:
The lifting roller system performs self-adjustment through its movable and rotatable design, automatically adapting to rail conditions without requiring manual intervention. The system serves itself by detecting and compensating for height variations and wear
3Manufacturing precision
If the lifting roller remains in contact with the rail during rapid forward travel, then positioning is maintained, but the roller may encounter raised rail fastenings, insulating joints, or weld beads causing damage
Solution Approach 1:
The lifting roller is made rotatable about its axis, allowing it to dynamically respond to obstacles during forward travel. When encountering raised fastenings or weld beads, the roller can rotate or lift slightly to avoid damage while maintaining overall contact with the rail
Solution Approach 2:
The lifting roller can be positioned and adjusted before encountering obstacles during forward travel. The rotatable design allows preliminary adaptation to potential hazards, preventing damage before it occurs
4Object-affected harmful factors
If the lifting roller is extended sideways far enough before the machine moves forward to avoid damage, then obstacles are avoided, but this increases the time required and reduces machine performance
Solution Approach 1:
The lifting roller is made rotatable and movable, allowing it to dynamically adjust during forward travel rather than requiring pre-positioning. This eliminates the need to extend and retract the roller before movement, maintaining both obstacle avoidance and high machine speed
Solution Approach 2:
The lifting roller maintains continuous contact with the rail during forward travel while being rotatable to avoid obstacles. This eliminates the need to stop or slow down for roller repositioning, maintaining continuous productive action
Data Source
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AI summary
The invention relates to a tamping machine (1) for compacting the ballast bed of a track (9), the machine comprising: tamping units (4) for tamping a track (9); a lifting-lining device (2) for lifting and lining tracks and points (9), said device being located between running gears (8); at least one height-adjustable lifting roller (6); and at least one lifting hook (7) which is height-adjustable independently of said roller, wherein the lifting roller (6) and the lifting hook (7) are located on a common support (31) which is slidably guided transversely to the tamping machine longitudinal axis (L) by means of an actuating drive (17). In order to provide advantageous working conditions, the support (31) is located on a guide carriage (10) by means of which said support can slide transversely to the tamping machine longitudinal axis (L) along a transverse guide (16), and the support (31) is mounted on the guide carriage (10) so as to be pivotably adjustable by means of a pivot drive (12) about a pivot axis (30) that is parallel to the tamping machine longitudinal axis.