Elevating mechanism and elevated floor elevating device

An elevating mechanism, comprising:

• a fast elevating module that can quickly raise a predetermined height, further comprising:
• a T-type nut connector which includes a T-type nut, at least one bearing, a nut, a transmission wheel connector, and a transmission wheel, the T-type nut can be connected to the transmission wheel connector through the transmission wheel connector. The wheels are fixed together and rotate synchronously;
• a connecting flange, further comprising an upper connecting flange and a lower connecting flange where the upper connecting flange being connected to the lower connecting flange;
• and
• a screw rod where an upper end of is fixed to a lower connecting flange and a lower end is sequentially passed through the nut, the T-type nut, at least one bearing, the transmission wheel connecting piece and the transmission wheel;
• and
• a slow elevating module which is fixed above the fast elevating module, where the slow elevating module rises and falls synchronously with the fast elevating module, the slow elevating module further comprises:
• a cylinder power source, further comprising a cylinder body and a piston, where the piston being movable within the cylinder body;
• and
• a contact block fixed to a top of the piston making the cylinder power source slowly raises and lowers the contact block to adjust the height of the contact block;
• and
• a T-shaped connector, where one end of which is connected to the upper connecting flange, and the other end of which is provided with a fixed base, and where the upper connecting flanges at both ends of the T-shaped connector are respectively connected to the fixed base to fix the fast elevating module and the slow elevating module.