Bottom Rack Mount

Subteam: ChassisSubsystem: SteeringAssembly: Steering RackCars: CR21, CR22, CR25, CR26I, CR26E

Purpose

Lower half of the steering rack clamp to the frame.

Function

Pairs with the top rack mount to clamp the rack body.

Design Process

No part-specific design process is documented. The Steering subsystem design process applies: 1. Kinematics sets steering geometry, Ackermann targets and rack travel. 2. Size the column and shafts for torsional stiffness and for the bearing housing that supports them. 3. Calculate static steering force from the tire and geometry, and check it against anthropometric limits. 4. Design the wheel shell around the button and switch layout and the dash sightline; prototype grips and take driver feedback. 5. Validate steering effort and Ackermann on track, using the alternate tie rod mounts to sweep setups.

Manufacturing Process

Milled on the CNC.

Full Material List

Aluminium.

Reoccuring issues

None recorded. This part has no entry in Knowledge_Transfer/Issue Logging/Fault Vault.xlsx, in either Issue Log.xlsx, in CR22/Issue Tracking/Shakedown 7-15-23.xlsx, or in any design review issue list found in CrimsonStorage or Box.

Still to document

Nothing in CrimsonStorage covers these yet.

Design Constraints — What held back the design whether it be location, time, materials etc
Analysis — How you get quantitative, predictive information on the part
Improvements — Improvements for this generation
Properties — Size, weight, mass, charge, thermal properties, anything else relevant