Dissembling a Worm Drive Gearbox

1677 Words4 Pages

CONTENTS

1 Introduction 3

2 Technical and scientific aspects 3

3 Disassembly 8

1 INTRODUCTION

This project involves dissembling a gearbox, analysing the material that it has been manufactured from and how these materials were manufactured. Designed by Bonfiglioli, this project will be dissembling their worm drive gearbox.

The modern world needs machines that have great power, some of the applications only need power; worm drives have a good power output due to their mechanical advantage which is equal to the number of teeth on the output drive. Coupled with a high-power motor the torque that can be produced from the worm drive is far superior to any other type of gearing. As a consequence, the forces in the worm drive will be quite high.

The Bonfiglioli worm drive has been made from as fewer components as possible, the driving components which have been heartened and specified to a high rating. The understanding is that the usage of the device is likely on a low speed transmission line or conveyor system in a factory. Furthermore, taken from the understood purpose further factors in its manufacturing nee to be considered; this will be looked at through this report.

This report will go though the manufacture of the drive in great detail, sections covered in this report will be the drives technical background and scientific aspects: including a description of the disassembly, how the parts are related and how they differ. The report will go on further to show how the parts fit together in a series of images and the critical features and components will be highlighted. Further information will be covered including a basic static analysis of loading and material selection verification.

2 TECHNICAL AND SCIENTIFIC ASPE...

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... hand press should then be used to remove the Wormshaft which is kept in place with a light press fitting. A hydraulic press does not offer the fidelity which a hand press can. It is best practice to use a hand press for light press fittings.

Remove Oilseal (8) from Wormshaft (3) and Circlip (unnumbered) from the Wormshaft. If any aluminum shavings/balling can be seen the whole Wormshaft will require replacing.

The Bearing (5) can be removed from the Wormwheel by using the hand press and a matching template to hold the assembly.

The assembly should now be fully disassembled with separate components: components may be removed from respective shafts if needed. Bonfiglioli has indeed manufactured their gearboxes to take advantage of many items to make the disassembly fast. They also have minimised the points of failure and made the remaining ones easy to access.

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