Manually adjustable movable base for outdoor umbrella

A manually adjustable movable base for an outdoor umbrella, comprising a base assembly, a threaded rod rotatably fitted with the base assembly, a cranking rod in transmission fit with the threaded rod and configured for driving the threaded rod to rotate, a plurality of pull rods rotatably fitted with the base assembly, and a plurality of bottom wheels arranged on the base assembly and in corresponding fit with the pull rods, wherein a lower end of the threaded rod is in threaded connection with a lifting block, and the lifting block is fitted with and connected to the pull rods, the base assembly comprises a base outer frame, a plurality of bottom wheel enclosure frames respectively and fixedly connected to corners of the base outer frame, and a plurality of pull rod mounting frames respectively and fixedly connected to the bottom wheel enclosure frames;

• inner ends of all the pull rod mounting frames are in fixed fit to form a center portion configured for rotatably mounting the threaded rod, the center portion is disposed at an end of the threaded rod, and outer ends of the pull rods are rotatably fitted with the pull rod mounting frames;
• and the bottom wheels are respectively located on the bottom wheel enclosure frames.