| 摘要 |
According to an illustrative example of the invention, a suspension seatpost comprises a oil-gas buffer for absorbing the energy from vibration, and an adjustable device is to adjust the preload of the buffer to suit the requirement of user. The suspension seatpost has an upper end secured to the seat of bicycle and a fixed tube inserted into the seat tube of bicycle. In addition, The suspension seatpost also includes a slide rod axially movable in the fixed tube, a follower mounted in the lower end of the slide rod by a bolt to move therewith. Besides, the buffer includes a floating piston placed in the tube to divide the space into an upper chamber filled with oil and a lower chamber filled with gas, a piston rod slidably installed in the upper chamber of tube and having an upper end abutting against the bolt, and a piston mounted in the lower end of the piston rod to move therewith.
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