Belt drive dual gear feeding mechanism of FDM type 3D printer

Abstract

The invention relates to a belt drive dual gear feeding mechanism of an FDM type 3D printer. The belt drive dual gear feeding mechanism comprises a stepping motor, a box body and a cover body. The bottom of the box body is fixed to the output end of the stepping motor, and the output end stretches into the box body. The cover body covers an opening in the top of the box body, and two second through holes are formed in the cover body in a spaced manner. A driving wheel and two driven wheels which are in transmission connection through one synchronous belt are arranged in the box body. The driving wheel is fixed to the output end. The two driven wheels are fixed to the lower ends of two rotating shafts correspondingly. The upper ends of the rotating shafts stretch out from the correspondingsecond through holes and are each connected with a feeding gear after stretching out. A pressing assembly capable of adjusting pressing pressure is arranged on the cover body and comprises two pressing bearings, and the pressing bearings are in one-to-one correspondence to the feeding gears. The belt drive dual gear feeding mechanism has the advantages that the two feeding gears rotating synchronously are adopted for feeding, and the slippage phenomenon is eradicated; the pressing pressure can be adjusted continuously, and applicability is good; and the influence of heating of the stepping motor on 3D printing wires is reduced.

Description

technical field [0001] The invention belongs to the field of 3D printers and accessories thereof, and in particular relates to a belt-driven double-gear feeding mechanism of an FDM type 3D printer. Background technique [0002] 3D printer, also known as three-dimensional 3D printer (3DP), is a cumulative manufacturing technology, that is, a machine of rapid prototyping technology. It is based on a digital model file, using special wax, powdered metal or plastic, etc. Composite materials, which create three-dimensional objects by printing layers of adhesive materials. At this stage, three-dimensional 3D printers are used to manufacture products. The technology of constructing objects by printing layer by layer. The principle of a 3D printer is to put data and raw materials into the 3D printer, and the machine will build the product layer by layer according to the program. [0003] The biggest difference between a 3D printer and a traditional printer is that the "ink" it us...

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