Automatic separation type gearbox

The utility model relates to an automatic separation type gearbox, including gear box casing, gearbox cover, motor device and drive assembly, drive assembly installs in gear box casing, still includeautomatic separating mechanism, automatic separating mechanism includes metal block, separation blade and fastener, the metal block is connected in the output wheel, and the metal block is circular form, and the metal block one side is met with the output wheel, and the metal block another side meets with the separation blade, forms the breach on the metal block, and the fastener is installed in the breach, gearbox cover is equipped with and exports the corresponding transmission piece of wheel, and the transmission piece is equipped with the spacing ring, and the spacing ring forms spacing draw -in groove, the spacing ring suit around the metal block, spacing draw -in groove and fastener looks adaptation, spacing ring, separation blade and output wheel are injectd the fastener in the breach. This separation type