Abstract: The present application provides a shoe box, comprising a box body, the box body comprises a hollow storage cavity, the storage cavity comprises a front opening; a box door, which is configured to close the box body, and the box door has an open state and a closed state; the box body comprises a first driving component for driving the box door to open or close, and the first driving component reciprocates along a depth direction of the storage cavity; the box door is accommodated in the storage cavity, when the box door is in the open state; the box door is stopped by the front opening, when the box door is in the closed state. In the present application, the box door is driven by a first driving component reciprocated along the depth direction of the storage cavity on the box body.

Abstract: A system is described for tracking light energy, or solar energy, on at least one axis. The system may include a single PV module or a system or plurality of PV modules. The system may include a bearing system that may allow for single axis rotation of the PV while providing greater ease of rotation as well as greater reliability in the bearing system. The system may function with a single PV module, single motor and actuator. The system may also function with multiple rows of PV modules and provide for a greater number of PV modules with a single motor, single actuator and multiple torque tubes with multiple bearing systems.