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1. Large cycloidal needle wheel planetary transmission. Needle teeth without teeth, tooth shell on both ends is not fixed in the needle, but with the roller bearing on the pin tooth shell, in a very general lubrication conditions, also can ensure the cycloid gear and pin gear meshing, the only relative rolling without relative sliding, fundamentally prevent the large cycloidal planetary transmission in the risk of tooth surface agglutination, and can also improve the transmission efficiency.
The eccentric arrangement on the input shaft has the following advantages due to the use of four cycloid wheels.
A. Make the rotating mass on the input shaft meet the requirements of static balance and dynamic balance. It can avoid the additional unbalanced dynamic load on the input shaft, make the transmission more stable, and also allow to increase the speed of the input shaft when necessary.
B. Under the same radial size, the power and torque transmitted can be doubled as long as the axial size slightly larger than the width of two rotary arm bearings is increased.
C. The rotation mass on the input shaft meets the dynamic balance requirements: the axial spacing between the center plane of each piece cycloid wheel is no longer strictly limited, that is, there is no strict limit on the width of the rotary arm bearing, which creates superior conditions for selecting the type of rotary arm bearing according to the life requirements. In order to improve the ability of transferring torque of the output mechanism without increasing the radial size, the structure is improved as follows: in the output mechanism, the cantilever ends of each pillar pin are connected with additional load-sharing rings. The load-sharing rings do not transfer power, but can keep the correct spacing of each pillar pin all the time, thus playing the role of load-sharing.
2, RV cycloidal needle wheel planetary transmission. RV transmission is a new type of transmission developed on the basis of cycloid pin gear transmission.
The principle and characteristics of RV transmission, it is composed of involute cylindrical gear planetary reducer and cycloidal pin gear planetary reducer. The motion is input by the center wheel 1, and the involute planetary gear 2 is fixedly connected with the crank shaft 3. The cycloid wheel 4 and the output shaft 6 form a parallelogram mechanism through 2 (3) crank shafts. Needle wheel 5 fixed.
The basic characteristics of RV drive can be summarized as follows.
(1) the transmission mechanism can be placed on the inner side of the two main bearings of the planetary frame, which can greatly reduce the axial size of the transmission.
(2) cycloid pin wheel planetary mechanism in low speed level, more stable transmission. With the increase of the number of rotor bearing and the decrease of the rotation speed of the inner and outer ring, the service life of the rotor can be improved.
(3) Only the design is reasonable, can obtain very high motion accuracy and very small back error.
(4) the output mechanism adopts the rigid cage structure supported by both ends, which is more rigid than the output mechanism of the general cycloid pin gear reducer and has high impact resistance.
(5) The transmission ratio range is large, 31-171 ratio
(6) High transmission efficiency, 0.85-0.92
