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Owner

Gerard Cardenas

Contributors

Philip Bortolotti Cesar Hernandez

Approved

Due date

Decision

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Table of Contents
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❓ Problem statement

U-Joint setup is required to be past the 45 degrees possible for the current U Joints. Additionally, the U-Joints are two different angles => decreasing the power transmission from the steering to the rack

💡 Research insights

📊 Solution hypothesis

🌈 Design options

  • Steering rack NEEDS to be extended to reduce the length of the tie rods

  • How are we going to positively lock the steering extender (since the rack has a blind hole)

  • Bolt the clevis into the steering extender (need to safety wire the bolt onto the clevis) and have the adjustable tie rod with heim joints and jam nuts at both ends

  • Include linear bearings mounted to the frame tubes for support at both ends and implement steering stop at ends of the extenders (as a step in the shaft) to make contact with linear bearing housings at full turn

Option 1

Option 2

Option 3

Overview

Use a double u joint to increase the allowable angle and help achieve the desired angle. Need a support to constrain the steering column from moving

Move the steering rack to the top of the frame and angle the rack to match the angle of the steering wheel. Need to create new steering arm on the upright

Use a 120 degree bevel gear enclosed in a gearbox which is mounted to the frame. Depending on bevel gear position, one or two u joints can be used

Screenshot

Link

Benefits and risks

(plus) simplest solution

(minus) Need extra support which will need additional mounting tabs on frame

(plus) increase legroom for driver (makes egress easier), eliminates need for joints and gears

(minus) alters steering geometry by increasing bump steer

(minus) necessitates new steering arm to protrude above and to the side of upright

(plus) reduces angle needed for both u joints/eliminates need for two u joints

(minus) bevel gear can be tricky to keep meshing

(minus) bevel gear with correct dimensions may be difficult to obtain

Criteria

✅ Follow up

Decision

Status

Next steps

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💎 Source files

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