Container, cover and chainsaw

A container, configured to be mounted on a cutting tool, the container comprising:

• a box body, provided with a liquid storage cavity, the liquid storage cavity being provided with a liquid filling opening and a liquid suction opening,
• a cover, detachably mounted on the liquid filling opening, and the cover being provided with a one-way ventilation structure,
• a suction device, arranged outside the box body,
• a first tube, one end of the first tube being connected with the liquid suction opening, and the other end of the first tube being connected with a liquid suction port of the suction device, and
• a second tube, one end of the second tube being connected with a liquid drainage port of the suction device, and the other end of the second tube extending to a part to be lubricated or cooled of the cutting tool;
• wherein
• the one-way ventilation structure comprises a through hole arranged on the cover and a one-way valve mounted in the through hole, and a filter part to filter air is mounted on a side of the one-way valve away from an oil storage cavity of the container.