| 摘要 |
PURPOSE:To enable load supporting capability of the captioned spring to be properly set and thereby improve vibration damping performance by constructing large and small air chambers such that a ratio between effective pressure receiving areas thereof can be changed at need, in the differential type air spring provided with the large and small two air chambers. CONSTITUTION:Large and small air chambers 1, 2 are partitioned by a bulkhead 3 and communicated with each other by an orifice 4 provided on the bulkhead 3. Respective large and small pistons 15, 18 of the air chambers 1, 2 are coupled to each other with a rod 11. Diaphragms 7, 10 are disposed between the large and small pistons 15, 18, and large and small shells 6, 9 respectively. Outer circumferences of the large and small pistons 15, 18 are gradually changed in the axial direction. Hereby, a ratio between effective diameters, namely, between effective pressure receiving areas of the large and small air chambers 1, 2 changes at need in responce to moving distances of the pistons 15, 18 and further amounts of compression deformations thereof, thus enabling load supporting capability to be properly set depending on the shapes of the pistons 15, 18. |
