Abstract
A compound oscillatory roller reducer (CORR) with a first-stage gear transmission and a second-stage oscillatory roller transmission is presented. The transmission principle of oscillatory roller transmission is introduced, and the tooth profile equation of the inner gear is derived. The analytical model of mesh force considering the installation errors and manufacturing errors is proposed. Then, parametric studies considering different errors on the mesh force are conducted. Results show that the design parameters are significant factors for mesh force. The mesh force is reduced by 17% as the eccentricity of disk cam increases from 2.5 mm to 4 mm. When the radius of the movable roller increases from 7 mm to 20 mm, the mesh force decreases by 8%. As the radius of disk cam increases from 125 mm to 170 mm, the mesh force is decreased by 26.5%. For the impacts of errors, the mesh force has a noticeable fluctuation when these errors exist including the manufacturing error of disk cam, the installation error of disk cam and the manufacturing error of movable roller change. The prototype of the reducer is manufactured and preliminary run-in test proved the feasibility of the transmission principle.
Highlights
The compound oscillatory roller transmission is a new type of few teeth difference transmission with multitooth meshing
This paper mainly studies the influence of manufacturing errors and installation errors on mesh force for the compound oscillatory roller reducer
The peak value of mesh force Fj and Fn rise smoothly as the installation error of disk cam grows to 0.01 mm and rises rapidly after 0.01 mm
Summary
The compound oscillatory roller transmission is a new type of few teeth difference transmission with multitooth meshing. Let C’-C’ represent the outer equidistant curve of C-C relative to the roller radius r based on the envelope principle, the equations of curves C-C and C’-C’ (the theoretic and work profiles of inner gear) as follows (1) Compact structure: Comparing with the RV reducer, CORR has no output mechanisms and is directly output by the movable teeth frame. (1) The contact distortions between the movable roller and the disk cam, the movable teeth frame, and the inner gear are small and stretchable, and other dis-. The installation error and manufacturing error of the disk cam and the manufacturing error of the movable roller are mainly considered
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