Transport System

Transport System (TS) - Self-Propelled Trolley

Buffer System

Introduction

The purpose of the transport system (TS) is to transport a load from one place to another and then return to its original position using no external power. It comprises a self-propelled trolley powered by the potential energy of the load placed on it. It operates by purely mechanical means. The trolley runs on a wheel in a track on the floor. It is about the size of a hospital trolley and will carry a load of approximately 8 kg. Short distances indoors will be covered initially - up to around 8 metres. The design of the TS system is described here. All descriptions and diagrams relating to the system can be reached via links in the pages. There are also links to other online resources like descriptions of components and assemblies used in the TS system. There is no table of contents; all descriptions can be reached via links on the pages.

The concept on which the system is based will be described along with the main components in the system and how they operate, interact and interconnect. The system enclosure and paneling will be described. The sequence of operations in the transportation process will be outlined. Multiple sketches are provided of components, panels, frames, and the transportation process itself. How the system is operated is described. Design notes, options and the system mechanics are given as well. References found useful during the design and options that were selected for use are given. Dimensions are available for an initial prototype model.

Operation

A load is placed on the trolley. The trolley is then put in motion by operating a lever. When the trolley reaches its destination, the load is removed. A lever is then operated and the trolley returns to its original location. A sketch of the TS and how it operates is given here >>

Keywords

transport system, self-propelled trolley, load, mechanical system, potential energy, springs, buffer springs, compression plate, rack and pinion, belt-pulley system, continuously variable transmission (CVT), mechanical variator, pins, levers, sustainability

References

This is a list of references used during this study. They refer to different options considered during the design. Component manufacturers who are possible sources of components that could be considered for the project are listed. Online resources are listed as well.

Artificial Intelligence

Artificial Intelligence systems Perplexity and Gemini (mainly Gemini), but also POE, were used during the design to find different options for mechanisms in the TS system. They were mainly used to get information on very specific mechanical operations in the TS system and to find references for mechanical components. The AI system was also asked for advice on the best mechanical solutions to use for particular use cases.

Gemini was able to remember the topic "Transportation System" and use it as background knowledge to answer questions put to it on the mechanical design. To get the best results from the AI system it was necessary to streamline the prompts to quite specific questions. One drawback of this prompting process is that you cannot make the queries too general as Gemini is unable to maintain a broad overview of the system being examined and can only answer quite narrowly focused questions well. But for specific design queries it was very good and was able to offer multiple alternatives every time.

Design Notes

The project is described in the following pages; the description is on-going and is continually updated as the design progresses. The TS system design started in Spring, 2024 and was first put online then. In April 2024 the original design was modified by replacing the two slider crank mechanisms operating in series in the trolley by a belt-pulley system.

Then in June 2024 another design iteration was put online. In this iteration the buffer clamps used to fix the dish and compression plate were replaced by pins. This is not a major alteration just replacing clamps with pins, but also showing how the pin carriage assembly is installed and operated.

In July 2024, the next design iteration came into being – the buffer version: this iteration is described in this write-up. Here a buffer plate along with buffer springs were added to the system. This was to store energy in a buffer (springs) to return the empty trolley to Bay 1 from Bay 2. It is described in the write-up along with diagrams.

A record is kept of notes taken during the design. They show the various options explored. Only some of the options were implemented but the notes are available for comparison purposes and as a record.