Rolling speed reducer with automatic protection function against overheating

Abstract

The utility model relates to a kind of reduction gear for rolling with overheating automatic protection function, belong to metallurgical rolling technology field.The reduction gear for rolling with overheating automatic protection function, comprising: reduction gear body;Overheating protection mechanism, overheating protection mechanism includes electromagnetic clutch, microswitch, metal frame, memory spring and trigger assembly;Motor;By setting the pure mechanical overheating protection mechanism driven by memory spring, provide the protection scheme not dependent on external power and complex control system.Using the physical properties that shape memory alloy occurs phase transition to produce huge restoring force under certain temperature, directly drive trigger assembly to cut off the circuit of electromagnetic clutch.It is controlled completely by physical principle, response speed is fast, anti-interference ability is extremely strong, avoid in rolling mill harsh environment, due to vibration, electromagnetic interference or line fault leading to the problem of electronic protection system malfunction or refusal to operate, to avoid the damage of reduction gear due to malfunction or refusal to operate.

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