helical geared motors lubrication method is unreasonable and structural design flaws, resulting in this cycloidal speed reducer in the application of unreliable. Reflected the problem, the first is to reduce the service life, followed by the sound and vibration, resulting in frequent maintenance. And every maintenance, you must replace the eccentric bearing and needle sets, so that maintenance costs increased. The work of the bearing is not very stable, due to the role of gravity and mechanical movement of the vibration, will inevitably lead to a slight displacement in the axial position of the bearing, this relative movement is very harmful, continuous impact may lead to elastic ring Of the deformation and break, the risk of bearing off the shaft off, even if the bearing does not fall off, but also because of vibration and produce a lot of noise.