High precision economic cycloidal pin-wheel reducer for teaching

The invention discloses a high precision economic cycloidal pin-wheel reducer for teaching, which has little parts; multiple parts are used in combination for processing and assembling; two crankshafts and a first tapered roller bearing sleeved thereon, a first adjusting pad, a first needle bearing, a second needle bearing, a second adjusting pad, a second tapered roller bearing combine to form a crankshaft assembly supported by a double tapered roller bearing and is used to transmit a first RV gear; a first main bearing and a support flange form a support assembly of a first deceleration part; a second RV gear, a second main bearing, a skeleton oil seal ring and a fixed axle form a second deceleration part; a spur gear and a second RV gear are in transmission through a fixed axle; and the first RV gear, the second RV gear and a housing form a cycloid gear assembly. The invention can be applied in teaching robots; the accuracy of backlash is between 1-2 arc minute; the precision is moderate; the technology is economical; the installation is convenient; the cycloidal pin-wheel reducer can be used for teaching and has a good application prospect.