A RETROFIT RETRACTABLE SUSPENSION MECHANISM FOR LIFTING AND LOWERING THE AUXILIARY AXLE OF A MULTI AXLE VEHICLE

摘要

The present invention relates to a retrofit retractable suspension mechanism for lifting and lowering the auxiliary axle of a multi axle vehicle. The invention recites a novel construction of retrofit retractable suspension mechanism. The mechanism is operated pneumatically and used to lift the auxiliary axle of any multi axle vehicle. It consists of upper cross member, lower cross member, air cylinder, tube, wire rope, U clamp, clamp plate and solenoid valve. The mechanism is operated at an air pressure of 8 X105 N/m2 (~ 8 bar). When compressed air is supplied the tube, tires of the auxiliary axle are lifted from the road surface. Whereas when the air is released from the tube, the tires are automatically lowered to engage the road surface due to the action of leaf springs. Figure 3 11