ROLLER SUPPORT Russian patent published in 1995 - IPC

FIELD: civil engineering. SUBSTANCE: roller support comprises upper 1 and lower 2 support plates with roller 3 disposed therebetween and provided with helical gears 5 mounted on its end portions 4. Said gears interact with corresponding racks of an antitheft device. The pitch circle of rack transmissions 5, 7 is equal to the diameter of the rolling surface of roller 3. Rack transmissions are made either of ordinary helical gears 5, 7 with contrary-directed helical teeth on opposite end portions 4 or of herringbone gears. Racks 7 may be attached to support plates 1 and 2 by bolts 9 fitted into threaded holes 10. Should it become necessary to replace herringbone gear transmissions in operation without relieving the load on roller 3, the gears are installed with a sliding fit while racks are fastened to support plates 1 and 2 with a provision for moving freely parallel to their surface after unscrewing bolts from holes 10. Racks may be secured to plates 1 and 2 by cams or wedges. EFFECT: higher operating reliability and lower metal content. 2 cl, 5 dwg