Automotive Accelerator Pedal
The manufacturer of an automotive accelerator pedal wished to reduce the total cost of their assembly by replacing a machined Solid Pin retained with a Push Nut. The Solid Pin functioned as the axle on which the pedal would rotate. The objective was to reduce the number and cost of components while concurrently simplifying assembly. The solution would have to comply with a retention criteria specified by the end user.
The assembly consisted of a plastic frame and plated steel lead screw. The plastic and lead screw had to rotate freely when the pedal was depressed. Evaluation of the assembly revealed that a pin could be fixed in one component, and allowed to rotate freely within the other. Of the two components, the steel lead screw provided greater material strength as well as the longest length of engagement for retention of a pin.