Filter assembly, filter device and dust collector

A dust collector, comprising:

• a dust bucket and a filter device contained in the dust bucket, wherein the filter device comprises a filter cage, a filter cartridge sleeved at outer side of the filter cage and an end cap connected to one end of the filter cartridge;
• the end cap is provided with a through end hole, and one end of the filter cage which corresponds to the end cap is provided with a middle column penetrating through the end hole;
• and further comprising:
• a cover body installed at outer side of the end cap;
• the end cap is provided with a plurality of clamping elements used for pressing against the middle column, and the cover body pushes the clamping elements toward the middle column in a process that the cover body rotates around the middle column along a rotation direction, to make the middle column clamped by the plurality of clamping elements.

A filter assembly for use in a dust collector, comprising a hollow filter cartridge, and an end cap connected to one end of the filter cartridge and shielding one end of the filter cartridge;

• wherein the end cap being provided with a through end hole;
• further comprising:
• a cover body installed at outer side of the end cap;
• the end cap shields the end hole, the cover body is rotatable around an axis penetrating through the end hole and the cover body, the cover body is provided with a plurality of pushing parts, the end cap is provided with a plurality of clamping elements corresponding to the plurality of pushing parts, each of the clamping elements is provided with a side surface facing away from the axis, and the pushing parts rotate along with the cover body and slide along the side surfaces of corresponding clamping elements, in a process that the cover body rotates around the axis along a rotation direction, so as to push the corresponding clamping elements to move toward the axis.