Roller Coaster Track Coupling Body Design
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Solution Overview
Problem
Existing roller coaster track connections face challenges such as high manufacturing effort, stress concentration, and operational strength issues due to eccentricity and re-entrant corners, which are not adequately addressed by current connection methods.
Innovation Solution
A track section design featuring a track coupling body rigidly connected to the track tube with a through-hole for a connecting element, allowing for detachable connection and a larger tangential connecting surface, using solid steel parts for enhanced fatigue and tensile strength, and avoiding re-entrant corners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thick end plate is welded to the end face of the track tube, then fatigue strength is improved, but manufacturing effort increases due to considerable machining required for smooth transition
Solution Approach 1:
The connection is divided into two functional parts: a thick end plate welded to the track tube for strength, and a separate coupling body attached to the end plate for machining. This segmentation allows each part to be optimized independently - the end plate provides fatigue strength through welding while the coupling body provides the smooth cylindrical surface for travel, eliminating the need to machine the entire end plate.
Solution Approach 2:
The coupling body acts as an intermediary element between the welded end plate and the traveling mechanism. It transfers loads from the traveling components to the end plate while providing a smooth cylindrical surface for car traversal, thereby eliminating the need to machine the end plate itself and reducing manufacturing effort.
2Ease of manufacture
If bolts are inserted through steel track coupling bodies, then connection is simplified avoiding welding on site, but stress peaks increase due to eccentricity between track tube and bolts
Solution Approach 1:
The coupling body extends the connection in the tangential dimension beyond the track tube circumference. By providing a larger tangential dimension for the connecting surface than for the through-hole, the design creates an asymmetric geometry that allows bolts to be positioned optimally for both assembly simplicity and stress distribution, reducing eccentricity-related stress peaks.
Solution Approach 2:
The coupling body has an asymmetric design where the tangential dimension of the connecting surface is deliberately made larger than the tangential dimension of the through-hole. This asymmetry allows the connecting surface to be positioned to minimize eccentricity while maintaining easy bolt access, resolving the contradiction between connection simplicity and operational strength.
3Strength
If longitudinal connecting elements are braced at specific variable intervals, then structural integrity is improved, but device complexity increases
Solution Approach 1:
The coupling body is designed as a universal component that serves multiple functions: it provides the bolted connection interface, supports variable spacing arrangements, and integrates with different track configurations. The standardized coupling body design allows it to be used across various positions and configurations without requiring custom components, thereby maintaining structural integrity while reducing overall device complexity.
Data Source
Figure 1
Figure 2A
Figure 2B~3A
AI summary
The invention relates to a travel tube piece (28) for a roller coaster arrangement (10), said piece comprising a travel tube (28a) and a travel tube coupling body (28b) which is fixedly connected to the side of the travel tube (28a) at a travel tube end (46) in the tangential direction (T) of the travel tube (28a) by means of a connecting surface (60) between the travel tube coupling body (28b) and the travel tube (28a). The travel tube coupling body (28b) also has a through-hole (56) extending through the travel tube coupling body (28b) in the tangential direction (T) of the travel tube (28a) for receiving a connection element (54) using which the travel tube (28a) can be detachably connected to an additional travel tube at the abutting ends via a clamping connection, wherein the extent (A) in the tangential direction (T) of the travel tube (28a) of the connecting surface (60) is greater than the extent (B) of the through-hole (56).