Electrical Enclosures

[smithbeuvic]

Context

We require enclosures for our PCBs

Outcomes

The enclosures should be able to do the following

• Provide mounting
• Provide vibration dampening
• Seal to IP code X4
• Allow the pcb to be removed by unscrewing 1 or 2 fasteners

Constraints

• All fabrication will be done in the mech machine shop. (ben)
• Budget should be no more than $100 for all the boxes and fasteners

Related Issues

We cannot fully design the enclosures until all the car PCB are designed. However we must validate our designs and develop a standard enclosure to use on each pcb.

Steps to reproduce behavior

• design test boxes to determine sealing method

• determine oring material, 20A durometer

• Determine the fundamental lid design

• Determine oring gland tooling

• Determine what heat set inserts we will use ( McMaster heatset inserts for plastics )

• Use test boxes to find out: How long can the wall be, how thick can the wall be, how does the heat set insert work?

Finalize a standard design for the electrical enclosures that can be used across the car.

To design an enclosure for the PCBs you must

• Create solid model of the PCB
• Get good solid models of the connectors etc. that will come through the wall of the enclosure ( connectors are in the 2017 elec enclosures grab cad )
• Learn to take profiles out of assembly into one part and unlink
• Design for front power, rear power, isolation board
• Double check all connectors are correct with pcb designers and wiring harness team.
• Design reviews throughout
• Fabricate.

[chadjmccolm]

Current 3D printed enclosure for the Raspberry Pi that controls the dash needs to be redone as part of this project. When removing the Pi the threaded extrudes it was screwed into broke in torsion.

Learning: we cannot rely on screwing into extruded cylindrical shells.