Hydraulic tunnel bogie for installing facing

In the hydraulic tunnel bogie, the rotary bearing is installed inside a fixing ring; and several bearing balls are installed in the bonding site of the fixing ring, the rotary bearing and the rotating stage. On the rotating stage there are four vertical guide pillars, one vertical hydraulic elevating cylinder and one tray on the guide pillars and capable of moving up and down. The roller bracket on the tray consists of columns, worm and rollers; two circular backing supports are connected via an oil cylinder and two guiding slide blades on the upper surface of the backing supports can slide inside the slide way. Each of the two obliquely supporting oil cylinders is hinged between the lower part of the tray and the lower part of one of the backing supports. Two locking oil cylinders are installed in the lower parts of the backing supports separately.