Motor Holder Design

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Profiles

The motor holder has three main profiles:

A PDF containing these profiles is available here.

Dimensions Table

The Dimensions Table

Dimension Value
Height 19.5mm
Thickness 3mm
Side_Cutout 14mm
Roundness 1mm
Gap 2.2mm
Battery_Holder 2.5mm
Length 53.4mm
Depth 2.2mm
Chamfer 1mm
Battery_Holder_Length 5mm
Battery_Holder_Thickness 1.5mm
Battery_Holder_Roundness 0.85mm
Battery_Holder_Front 1mm
Fillets 2mm
Battery tower 9.3mm

Base Sketch

The base sketch is pretty straight forward to create - its just a couple of rectangles, with some fillets applied. See the drawing below.

Base Sketch


Extrude Base

Extrude the Base Sketch up by 2.2mm

Dimensions:

Extrude Base


Extrude-Cut Edges

The Edges of the motor holder need to friction fit into the slots in the chassis, so a 1mm angular cut is applied.

Dimensions:

Extrude-Cut Edges


Extrude Battery Holder

Next the base profile is used to select the small raised section that holds the battery in place. See the diagram below to understand which profile parts to slect for extrusion.

Dimensions:

Extrude Battery Holder


Apply chamfer

The battery tower needs a chamfer applying to it so that it has a 45º degree from the base.

Dimensions:

Apply chamfer


Battery Holder Profile

The Battery folder needs a rounded section to hug the battery and keep it in place. See the illustration below to create the profile.

Battery Holder Profile


Extrude Battery Holder Profile

The battery holder profile now needs to be extruded

Extrude Battery Holder Profile


Front Chamfer Profile

Front Chamfer Profile


Extrude Front Chamfer Profile

Extrude Front Chamfer Profile


Fillet

Some optional fillets can be applied (see the illustration below). These can give extra strength to the part and make it more astheically pleasing.

Optional Fillets


Motor Holder Complete

And you’re done. Next, right-click on the Body and save as an STL file, then print out the part.

Hero shot