US Patent 8191911 Multiple torsion bar cartridge suspension systems applications

An active torsion cartridge may be installed in numerous vehicle applications. An active torque tube subassembly begins with a drawbar bearing securely pressed into a torque insert bore. A torque insert is intimately installed into mating active torque tube. The active torque tube exhibits a finished circular section at the inside end and an outer machined configuration matching the torque insert on the outer end to maintain material wall thickness and load carrying capacity. When the two surfaces meet, multi-point shoulders are created for future use. A retaining ring is installed into mating groove in torque tube inside end. An active torque tube bearing is securely pressed into a bearing housing bore and protruding as desired for thrust loading. An opposite end of a protruding thrust bearing is carefully aligned with active torque tube machined configuration and torque tube bearing slides fully onto its diameter and abuts retaining ring.