Sieve-moving type sieving-sorting machine

The utility model relates to a sieve-moving type screening machine, belonging to the technical field of screening apparatus. The sieve-moving type screening machine is used for solving the problem of the short service life of a sieve. The utility model has the technical proposal that the sieve-moving type screening machine is composed of screening machine units and a machine frame; each screening machine unit is provided with a sieve moving device which is composed of two sets of retarding mechanisms, sieve reels, tensioning wheels with the same arrangement, and the retarding mechanisms, sieve reels and the tensioning wheels are positioned on both ends of the sieve; the sieve reels and driving gears are coaxially fixed; gears on the tail ends of the retarding mechanisms and the driving gears are connected in transmission. The utility model is main characterized in that the sieve moving devices or the spring-tensioning devices are provided, which effectively extends the service life of the sieve; an exciter is adopted to drive many groups of vibrating mechanisms to vibrate the sieve through a driving device, which can reduce elements, and makes the vibration characteristics of many groups of vibrating mechanisms easily tend to be consistent; the screening machine adopts a secondary vibration damping supporter, which makes vibration be smaller from the screening machine to the foundation.