Pipe Machining Carriage With Adjustable Wheels and Chain Guidance
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Solution Overview
Problem
Existing pipe machining carriages face challenges in maintaining accuracy and stability due to irregular pipe shapes and diameters, leading to deviation and slipping issues, particularly when using a fixed chain and wheels with non-simultaneous rotation.
Innovation Solution
A carriage design with an adjustable distance between drive wheels and a roller chain system where both wheels are mounted on the same shaft to rotate simultaneously, ensuring stable positioning and movement on pipes of varying diameters, and a machining tool aligned with the pipe's center for precise machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed chain is mounted to guide the carriage, then the chain can be easily installed, but the carriage cannot be accurately guided and rotates irregularly
Solution Approach 1:
The chain is changed from a fixed mounting to a movable mounting where it can move together with the carriage along the pipe. The chain wraps around the pipe and is coupled to both ends of the carriage, allowing it to dynamically adapt to the pipe surface while guiding the carriage accurately.
Solution Approach 2:
The chain acts as an intermediary element that transfers motion between the carriage wheels and the pipe surface. By wrapping around the pipe and coupling to both ends of the carriage, it provides a mediating mechanism that ensures synchronized wheel rotation and accurate positioning.
2Device complexity
If the distance between drive wheels is fixed, then the carriage structure is simple, but it cannot be stably mounted on pipes of different diameters
Solution Approach 1:
The distance between the front and rear drive wheels is made adjustable rather than fixed. The wheels can be positioned at different distances from each other to match pipes of various diameters, ensuring stable mounting and operation across different pipe specifications.
Solution Approach 2:
The physical parameter of wheel spacing is made variable to adapt to different pipe diameters. By changing the distance between wheels according to pipe specifications, the carriage maintains stable contact and guidance on pipes of varying sizes.
3Ease of operation
If front and rear wheels are rotated by separate motors, then each wheel can be independently controlled, but the wheels do not rotate simultaneously causing carriage slipping
Solution Approach 1:
The control of front and rear wheels is merged into a single motor system. The motor is coupled to both wheels through a shared transmission mechanism, ensuring they rotate simultaneously and preventing carriage slipping while maintaining coordinated control.
Solution Approach 2:
A shared motor and transmission system acts as an intermediary that synchronizes the rotation of both wheels. This intermediate mechanism ensures simultaneous rotation while still allowing for operational control.
4Reliability
If a motor is mounted to precisely control wheels for simultaneous rotation, then the wheels rotate simultaneously preventing slipping, but the structure becomes complicated and cost increases
Solution Approach 1:
Instead of using separate motors with complex control systems, a single motor is merged with both wheels through a shared transmission mechanism. This simplifies the control system while achieving simultaneous wheel rotation and preventing carriage slipping.
Solution Approach 2:
A single motor performs the function of controlling both front and rear wheels simultaneously. This multi-functional approach eliminates the need for separate motor control systems while maintaining reliable synchronized rotation.
Data Source
AI summary
A pipe machining carriage, including a carriage configured to travel along an outer circumference of a pipe, and a chain coupled to both ends of the carriage wraps around the outer surface of the pipe. The carriage and the chain precisely move along the outer surface of the pipe. The disclosure may provide a carriage that performs machining with high accuracy by preventing the carriage from deviating from the original mounted position by moving the chain along with movement of the carriage. The disclosure may also provide a carriage mounted stably on the outer circumferential surface of the pipe to machine the pipe, regardless of pipe diameter, by adjusting a distance between the carriage drive wheels. The disclosure may prevent the carriage from slipping by mounting a front wheel and a rear wheel to the same drive shaft so the front and rear wheels rotate simultaneously in response to motor operation.