BRIDGE-LAYER Russian patent published in 2008 - IPC E01D15/127 

FIELD: transportation, servicing technology.

SUBSTANCE: invention pertains to bridge facilities, and more specifically to bridge-layers. The bridge layer consists of self-propelled chassis, laying mechanism and mounted cantilever, consisting of two ruts joined together by braces, each of which is made from middle units and outermost units hinged together by lugs and pins. The new thing in the bridge-layer is that, the laying mechanism is realised using two frames, located one after the other, with slit guides on the sides. The lower frame is mounted on a rotary lever and is immovably fixed to it, while the upper frame is mounted on the lower frame with possibility of longitudinal displacement on rollers, mounted on slit guides on the lower frame. The inter-rut links of the cantilever are in the form of trapezoid frames, consisting of two half-frames, joined together from the top using hinges and by shock-absorbers on the under-side. On the slanted side walls of the ruts there are support rollers. On the lower side there are rollers, mounted on slit guides of the upper frame. Ruts of the cantilever are mounted on support rollers of the trapezoid frames, with possibility of vertical displacement with simultaneous separation of ruts by two movable arms, moved by a mechanism driven by a hydraulic motors, mounted the inclined frames, fixed to the case of the self propelled chassis. In this case, the ruts of the superstructure are fixed at the upper most or lower most position on trapezoid frames using shot-pins with a hydraulic gear, located inside each rut. Displacement of ruts during their lowering or raising is limited by the support rollers, fixed on each rut and moveable in the grooves of the trapezoid frame. Use of the proposed technique enables increasing the thickness of the transient part of the superstructure, and as a result, increases its carrying capacity by 25...30%.

EFFECT: improved structure of the bridge-layer, which increases the carrying capacity of the superstructure of the bridge.

9 dwg