Factory directOUMAhand chain hoist chain block,Ouma lever hoist, OuMa electric hoist
Hand chain hoist lift weights, do pull chains, bracelets round clockwise rotation, down counterclockwise when you pull start pull chain, separation of braking with brake pads, Ratchet pawl under static, five-toothed sprocket shaft driven lift long runs in the opposite direction, thereby steadily decreasing weight. Hand chain hoist general one-way ratchet friction brake, under load brake itself, role of the pawl spring and ratchet gearing,
Hand chain hoist
Brake safety. It is safe, reliable, easy maintenance, high mechanical efficiency of light, hand chain pulling force is small, the weight is easy to carry, durable, beautiful a size characteristic of applied to factories, mines, construction sites, wharves, docks, warehouses and other used equipment, lifting cargo, especially for open and non-power operations, further demonstrates its superiority.
Hand chain hoist main selection alloy manufacturing the parts, chain 800Mpa enhanced lifting chain, materials are generally 20M2, medium-frequency quenching heat treatment, low abrasion, corrosion resistant chains; high-strength hooks, materials are generally alloy steel, forge-hook design to ensure a slow lift to prevent overload; in line with the European CE safety standards.
Working principle
Hand chain hoist as an upgraded version of the fixed pulley, inherited the advantages of the fixed pulley, using reverse check braking reducer and a combination of chain pulley block, arranged symmetrically structures with two-stage spur gear rotation, simple, durable, and efficient.
Hand chain hoist by hand pull chain, bracelet wheel, brake friction plate Ratchet and pressurised into one common rotation and tooth long axis of rotation gear, gear tooth short shaft and splined hole. In this way, device in lifting on the splined hole gear sprocket-driven lifting chain, thereby steadily lifting. Using one-way ratchet friction brake, under load brake itself, role of the pawl spring and ratchet gearing, brake safety.
