Eccentric Guide Roller Fixation for Gantry Crane Wear Reduction
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Solution Overview
Problem
Gantry cranes face challenges in achieving precise and positive engagement of guide rollers to prevent premature wear on rail heads due to sliding friction, which existing solutions fail to address effectively.
Innovation Solution
A guide roller arrangement featuring a carrier plate with a receiving opening and a fixation hole, an axle carrier with outside toothing, and a securing plate with inside toothing, allowing for eccentric displacement and positive fixation, enabling precise adjustment and fine gradation through vernier adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guide rollers are used to prevent sliding friction and wear on rail heads, then wear resistance is improved, but achieving precise and stable fixation of guide roller position becomes difficult
Solution Approach 1:
The patent introduces an intermediary fixation mechanism consisting of a carrier plate with receiving opening and fixation hole, combined with an axle carrier featuring outside toothing and a securing plate with inside toothing. This intermediary structure mediates between the guide roller and the crane head carrier, enabling precise angular positioning through toothed engagement while maintaining the guide roller's wear-resistant function.
Solution Approach 2:
The patent implements a nested structure where the axle carrier with outside toothing is received within the carrier plate's receiving opening, and the securing plate with inside toothing is nested over the axle carrier. The inside toothing of the securing plate engages with the outside toothing of the axle carrier, creating a nested fixation system that enables precise angular positioning through complementary toothed engagement.
2Stability of the object's composition
If guide rollers are used to hold crane head carriers on rails, then operational stability is improved, but adjustment precision and fine gradation become insufficient
Solution Approach 1:
The patent implements a dynamic adjustment mechanism where the axle carrier can be rotated to different angular positions relative to the carrier plate, allowing the guide roller's lateral position to be adjusted. The toothing engagement provides discrete angular increments, enabling fine gradation in positioning while maintaining operational stability during crane operation.
Solution Approach 2:
The patent segments the fixation system into discrete angular positions through the toothing mechanism. The outside toothing on the axle carrier and inside toothing on the securing plate create segmented angular increments, allowing precise step-by-step adjustment of the guide roller's lateral position while maintaining stable engagement at each position.
3Device complexity
If conventional fixation methods are used for guide rollers, then device simplicity is maintained, but positive engagement and prevention of shifting during operation cannot be achieved
Solution Approach 1:
The patent introduces an intermediary toothing engagement mechanism between the axle carrier and securing plate that provides positive engagement through complementary inside and outside toothing. This intermediary toothed connection prevents relative shifting between components during operation while maintaining relatively simple overall structure.
Solution Approach 2:
The patent implements preliminary action through the toothing engagement that pre-establishes positive mechanical interlocking between the axle carrier and securing plate. The inside toothing of the securing plate engages with the outside toothing of the axle carrier before operation begins, preventing any lateral shifting or play during crane operation.
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
The solution ensures stable and precise fixation of guide rollers, preventing sliding friction and allowing for fine adjustments, thereby reducing wear and improving the operational reliability of gantry cranes.
Implementation Method 1
The engagement between the outside toothing of the axle carrier and the inside toothing of the securing plate forms a positive connection
Implementation Method 2
The outside toothing runs along a circle, whose axis is laterally offset from and parallel to the axis of rotation of the guide roller. In this manner, a type of eccentric displacement can be achieved.
Data Source
AI summary
A guide-roller arrangement for gantry cranes (1) has two rotatably mounted axial carriers (21) on which the guide rollers are seated. The guide rollers (11, 12) are mounted on journals which are arranged in the carrier plate (15) in a manner eccentric to the axis of rotation (41) of the axial carrier (21). The selected eccentric position of the journal can be fixed in a formfitting manner with the aid of toothing formations (29, 36) on the axial carrier and on the carrier plate.