UNIFIED BRIDGE COMPLEX Russian patent published in 2003 - IPC

FIELD: mobile collapsible bridges. SUBSTANCE: unified bridge complex includes bridge layers, tracked or wheeled, each mounted on base chassis, fitted with outriggers, bridge mounting mechanism, bridge block comprising center and two end blocks hinged to center block over upper power bands, equipped with mechanisms ensuring their collapse on center block and closure of butt joints of lower power bands. Characteristic feature of invention lies in that roadway of each bridge block is solid and is provided with collapsible expanders put on outer sides. Each end block is fitted with butt joints and ramps put on its external end and lower part of it is equipped with mobile guides linked to upper part with the aid of four-bar linkage and hydraulic cylinder of drive. Bridge mounting mechanism includes mounting lever, rocking cradle with locating arms in nose part and mechanism for bridge pushing. Mounting lever is moveable with reference to rocking cradle hinged to base chassis. Nose outrigger fitted with carriages and mobile beam anchored on front part of chassis includes four-bar linkage provided with hydraulic drive. Front link of four-bar linkage comes in the form of stiffening girder which ends carry stopping surfaces and hydraulic cylinders hinged through mobile beam to vertical axles of carriages interacting with bearing plate. Rear part of chassis is equipped with central outrigger, catchers and coupling bracket. EFFECT: increased carrying capacity of bridge, improved size characteristics of bridge layers, exclusion of transportation vehicles from mix of complex and provision for joint usage of bridge layers, wheeled or tracked, for assembly of large-span bridge. 2 cl, 21 dwg