Tuesday 29 January 2013

Motor Mount Design

Pulled the radiator out to make some measurements for the motor support last weekend.  The basic idea is to mount the controller, A/C compressor, power steering pump and the vacuum pump all with the motor on the existing motor mounts.
Trimble publishes a free CAD package called SketchUp which was used to model the main components and their locations.  The image below shows the overall arrangement.  The motor is in the middle in red.  The A/C compressor is on the left hand side as close to its existing position as possible hopefully not requiring any change to the existing piping.  The A/C compressor will be driven from a 150mm pulley fitted to the non-drive end of the motor and the existing idle pulley will be used to tension the A/C drive belt.  The vacuum pump is also on the left hand side behind the A/C compressor.  The power steering pump is on the right hand side, again close to the position of the existing pump in an attempt to minimise changes to existing hydraulic piping.  The controller is on the top of the motor to minimise the length of cable that carries the highest current.
Arrangement of Main Components
The image below shows the motor support on its own.
Motor Support From Below
The angles with the end plates are separate from the rest of the support and will be located on the existing engine mounts.  The end plates will be bolted to the front plate and the adaptor plate on the bell housing.  The bolt holes will be marked with the assembly in the engine bay.
The plan is to get the pieces of plate and angle cut by a local supplier and then spend some time in the shed aligning things and welding it all together.  Hopefully the entire assembly can be lifted into the engine bay in one go when it comes time to take the vehicle off the road.