The invention belongs to the technical field of
rail transit, and discloses a double-thread adjusting structure, a stepless self-height-adjusting vibration
isolator and a rail
system.The double-thread adjusting structure comprises a first thread table, a second thread table, a third thread table and a fourth thread table, the second thread table is provided with an internal thread or an external thread, and the first thread table and the second thread table are coaxially arranged; a center hole is formed in the second threaded table. The adjusting threaded
barrel, the first threaded table and the second threaded table are connected to the edges of the two ends of the adjusting threaded
barrel in a threaded mode, and the adjusting threaded
barrel rotates to drive the first threaded table and the second threaded table to get away from each other or get close to each other in the axial direction. The structure can be independently used with an existing spring vibration
isolator and can also be matched with an elastic buffer piece and a fixing seat through adaptive deformation to form a self-height-adjusting vibration
isolator, the self-height-adjusting vibration isolator is adjustable in self height, efficient in construction and installation and good in use stability, a floating slab track
system is formed by matching with an embedded sleeve and a floating slab, smoothness is good, vibration reduction and
noise reduction performance is excellent, and the service life of the floating slab track
system is prolonged. The elastic buffering pieces are various in form, and the floating slab
vibration isolation design under various working conditions can be well met.