MEC3MCD: Gear Laboratory - Report Writing - Engineering Assignment Help

Assignment Task:

This laboratory will run over three weeks. You are tasked to design and simulate a simple compound gear train and an epicyclic gearbox that has a particular ratio. All questions to be uploaded to the LMS for marking. Your gearbox design has the following limitations, 

• The ratio which you are tasked to achieve is 1:14. 

• The smallest gear pitch circle diametre is 20mm. 

• The smallest modulus allowed is 1. 

• Simple compound gear train implementations maximum distance between the top and bottom plate is 9mm (3x3mm acrylic sheets). 

• Epicyclic gear train implementations maximum distance between the top and bottom plate is 12mm (4x3mm acrylic sheets).. 

• Your gearbox design must fit within 100mm x 100mm. No part of the gearbox can protrude outside of this envelope. 

Designs that do not adhere to the previous specifications will be penalised when marking. 

1. [5] Design a simple compound gear train which meets the requirements. Calculate that your chosen design meets the specified ratio of 1:14, showing all working. Justify your design decisions. 

2. [5] Design a epicyclic gear train which meets the requirements. Calculate that your chosen design meets the specified ratio of 1:14, showing all working. Justify your design decisions. Pay special attention to the rotating surface of the planet gears. 

3. [10] For both types of gearboxes(compound and epicyclic), create the parts and assembly of your design using Solidworks. 

Please check design help document PDF which will outline assembly techniques. 

• The gearbox is to be made from 3.0mm Acrylic clear sheet(cut using a laser cutter). Blank part files are provided for you on LMS. 

• Gears can be created using the Solidworks toolbox add-in. This can be enabled via the following steps, 

1. Solidworks Add-Ins → SOLIDWORKS toolbox.

2. Design library pane (right hand side of screen → toolbox → insert appropriate gear(or fastener) into the model. 

• Ensure that your design can facilitate ”input_output_shaft.sldprt” bonded to your specified input/output gears. Additionally the ”input_output_shaft.sldprt” should sit inside the two outer 100x100x3.0mm sheets, ”base1.sldprt” and ”base2.sldprt” (ie. an appropriate cut out must be made) 

• Each gear must be marked with an appropriate identifier. 

• Ensure that your Solidworks assembly contains the appropriate M6 × 30 cap screws and nylocks. Please use the aforementioned solidworks toolbox to find the appropriate fastener. 

4. [10] Simulate both designs using Solidworks motion. Confirm and show that your design meets the required 1:14. (Hint, use gear mates to apply the appropriate gear ratios.) Upload pack and go to LMS.

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