Mechanical speed bump capable of lifting

The invention discloses a mechanical speed bump capable of lifting, which includes a speed measuring mechanism, a transmission mechanism, an obstruction mechanism and a reset mechanism. The speed measuring mechanism includes a force transmission spring and an oil pressure buffer, displacement of a T-shaped sliding block is output by damping at different speed, the transmission mechanism is a four-bar mechanism, the displacement of the T-shaped sliding block is transmitted to the obstruction mechanism, the obstruction mechanism includes an obstruction plate hinged to a rack, magnitude of the displacement of the T-shaped sliding block acts on a rocker hinged to the frame below the obstruction plate, the raised state of the obstruction plate can be changed, whether to block a vehicle or not is determined, the reset mechanism includes several sets of reset tension springs and a lock latch, and the main function is to reset a system. When the speed is higher than a certain set value, the obstruction plate keeps pr