Lifting and placing caster

A lifting and placing caster, comprising:

• a mounting seat;
• a mounting frame, wherein one end of the mounting frame is rotatably connected to the mounting seat, the mounting frame comprises a roller positioned on a lower side of the mounting frame, a first rotating shaft, a strip through hole throughout which the first rotating shaft is disposed so that the first rotating shaft is able to reciprocate in an extension direction of the strip through hole, two ends of the strip through hole are a first end and a second end, respectively, and the first end is positioned between the second end and a connecting end between the mounting frame and the mounting seat;
• a swing rod, wherein one end of the swing rod is rotatably connected to the mounting seat, and the other end of the swing rod is rotatably connected to the first rotating shaft;
• and
• a limiting rod rotatably connected to the mounting frame;
• wherein the roller is capable of being driven to switch between a first position and a second position through the rotation of the mounting frame;
• in response to the roller being in the first position, the roller is below the mounting seat and subjected to an upward force exerted by a support surface, and the first rotating shaft has a tendency to move towards the second end such that the first rotating shaft abuts against one end of the limiting rod, the other end of the limiting rod abuts against the mounting frame, and the mounting frame achieves self-locking;
• and
• in response to the limiting rod being separated from the first rotating shaft, the first rotating shaft is capable of moving towards the second end, the roller is driven to move upward to the second position through the rotation of the mounting frame, and in response to the roller being in the second position, the roller is above a lowermost end of the mounting seat.