Mobile base device

摘要

A mobile base device for a sun umbrella including a base cover. A bearing support is arranged inside the base cover and is hinged with a main lifting arm via a stiffened plate mounted thereon. An outer end of the main lifting arm is screwed to a lifting screw mounted on the bearing support via a lifting screw sleeve and an inner end of the main lifting arm is fixedly coupled to a set of secondary lifting arms through joints. A central portion of the set of secondary lifting arms is hinged with a set of stiffened plates mounted on the bearing support and a lower portion of the outer end of the set of secondary lifting arms is fixedly coupled to a set of casters. Such structure has the advantages of easy movement and fixation as well as practicality and convenience.

主权项

1. A mobile base device for supporting a sun umbrella, the sun umbrella having a pole, the mobile base device comprising:
a) a base cover (9); b) a bearing support (1); c) a main lifting arm (10); d) a plurality of stiffened plates (1a); e) a plurality of secondary lifting arms (11); f) a plurality of casters (12); and g) a joint;wherein:
the bearing support (1) is arranged inside the base cover (9); lower ends of the plurality of stiffened plates (1a) are mounted on the bearing support (1); upper ends of the plurality of stiffened plates (1a) are connected together for receiving the pole; a central portion of the main lifting arm (10) is pivotally connected to one of the plurality of stiffened plates (1a); one outer end of the main lifting arm (10) is screwed to a lifting screw (2) mounted on the bearing support (1) via a lifting screw sleeve (6) and one inner end of the main lifting arm (10) is fixedly coupled to the plurality of secondary lifting arms (11) through the joint; inner ends of the plurality of secondary lifting arms (11) are coupled to the joint; central portions of the plurality of secondary lifting arms (11) are respectively pivotally connected to the plurality of stiffened plates (1a); lower portions of outer ends of the plurality of secondary lifting arms (11) are respectively fixedly coupled to the plurality of casters (12); and a plurality of saddle weights (8) is arranged inside the bearing support (1) and the plurality of stiffened plates (1a) is located between two adjacent saddle weights (8).