Buffer is driven on top relates to oil machinery, urceolus (3) one end is equipped with inner ring platform (5), the other end is equipped with the annular and many lamellas keep off ring (6), urceolus (3) inner wall is equipped with the spline segment, the part that top connection (1) and lower clutch (2) is located urceolus (3) is equipped with outer loop platform (8) respectively, be equipped with on outer loop platform (8) global with urceolus (3) inner wall spline segment complex spline, the rotation of restriction top connection (1) and lower clutch (2), inner ring platform (5) and manylamellas fender ring (6) of urceolus (3) keep off the outside two outer loop platform (8) respectively, elastomer (4) are overlapped respectively on top connection (1) and lower clutch (2) outer wallto arrange in respectively in urceolus (3) in between two outer loop platform (8) and inner ring platform (5) of urceolus (3) and rather than outer loop platform (8) faced mutually between the cushioning effect. It has stable performance, the rational in infrastructure and anti advantage of drawing the tonnage big of putting forward.