Trailer suspension specialist Timbren Industries recently highlighted its “unusual” drop-down trailer suspension.
The company designed the drop-down suspension at the request of a customer who needed a suspension that allowed the frame of a trailer built to transport toilets to lower all the way down to ground level.
“This was going to require a little more ingenuity than a simple drop axle,” Timbren said. “The suspension would have to fold away—just like the landing gear of a jet right after takeoff.”
So Timbren engineers went to work designing a suspension that folds away, allowing the trailer to touch the ground.
The company’s resulting suspension system is comprised of a frame bracket, swing bracket, Aeon hollow rubber spring, control arm and locking pin. Using the locking pin, the swing bracket can be positioned either for transit or drop-down, which folds the suspension away, allowing the trailer frame to rest on the ground.
Timbren's standard drop-down independent rubber suspension boasts a load capacity of 8,000 pounds per suspension, and a 10,000-pound version also is available, Timbren said. The system can be used with a single or tandem axle, resulting in a total of 16,000 to 20,000 pounds of load capacity.