| 摘要 |
<p>A heavy duty rolling lobe air spring (12), especially for trucks and trailers, which has an open hollow piston (32) providing a reservoir (34) and an outer surface on which the lobe of a flexible sleeve (18) rolls. The surface includes a horizontal top (42), a gently curved outer surface (43) joining an inverted frustro-conical side (44) and terminating in an outwardly flared bottom portion (48). Previous rolling lobe air springs adapted for heavy design loads have a high spring rate which fails to provide a soft, smooth ride only achieved in air springs having a low spring rate. The rolling lobe air spring (12) achieves a low spring rate providing a soft, smooth ride for heavy design loads. The side surface (44) has an angle with respect to the axis of the piston (32) of about 23 . The volume of the piston (32) and sleeve (18) of 850 to 1500 cu. in. (13,900-24,600 cu. cm.) and the angle of the frustro-conical surface (44) are such that the effective area of the sleeve (18) decreases under jounce and the spring rate is in the range of 100 to 300 pounds per inch (17.5-52.5 KN/m) at a design load in the range of 1000-8000 pounds (454-3629 kg). </p> |
