Sealing structure of machine tool reduction gearbox and machine tool reduction gearbox

The utility model is applicable to the field of reduction gearboxes, and discloses a sealing structure of a machine tool reduction gearbox and the machine tool reduction gearbox. The sealing structurecomprises a top cover and a plug, wherein the top cover is connected with a machine tool reduction gearbox and provided with a through hole, and the plug is connected with the top cover and comprisesa blocking part used for blocking the through hole and a handle part connected to the end of the blocking part and used for allowing a user to manually rotate or press the plug. The machine tool reduction gearbox comprises a reduction gearbox body with the observation hole, and the observation hole is provided with the sealing structure of the machine tool reduction gearbox. The sealing structureof the machine tool reduction gearbox and the machine tool reduction gearbox are good in sealing effect, convenient and fast to disassemble and capable of being assembled and disassembled without tools. 本实用新型适用于减速箱领域，公开了一种机床减速