Cycloidal pin wheel speed reducer

Abstract

The invention belongs to the technical field of spaceflight servo mechanisms and particularly discloses a cycloidal pin wheel speed reducer. The cycloidal pin wheel speed reducer comprises an input support, an output support, an input shaft and an output shaft, wherein the input support and the output support are fixedly connected, wherein the input shaft is an eccentric shaft, a non-outer-ring needle bearing is arranged outside the input shaft, an epicycloidal wheel is arranged outside the needle bearing, needle teeth are arranged outside the epicycloidal wheel in a meshing mode, an output shaft supporting bearing is arranged outside the shaft end of the output shaft, and the output support is located outside the output shaft supporting bearing. A retainer and a connection bolt are structurally omitted, and a W output mechanism is omitted, so that the axial size of the reducer is short, and a structure is more compact. The needle teeth are designed to be of eccentric structures, the epicycloidal wheel is eccentrically arranged relative to a hypocycloid wheel, the needle teeth eccentrically rotate while the positions of the rotary centers are fixed, and the rotary centers of the needle teeth are distributed on a concentric circle coincident with the rotary center of the hypocycloid wheel. The structural form is favorable for increasing the tooth number of the needle teeth meshed with the cycloid gears at the same time, and bearing capacity for transmission is improved.

Description

technical field [0001] The invention belongs to the technical field of aerospace servo mechanisms, and in particular relates to a cycloidal pinwheel reducer. Background technique [0002] Cycloidal pin gear reducer is a kind of planetary transmission reducer with small tooth difference. It has a series of advantages such as compact structure, light weight, large transmission ratio range, high transmission efficiency, stable and reliable transmission, etc. It can replace two-stage, The three-stage ordinary cylindrical gear reducer meets the needs of aerospace light weight, miniaturization and high reliability. [0003] The general cycloidal pin wheel planetary reducer is mainly composed of input shaft, double eccentric sleeve, arm bearing, cycloidal wheel, pin tooth, column pin, column pin sleeve and output shaft, etc. The eccentric device in the reducer is the weak link , The arm bearing is inside the output mechanism of the cycloid wheel, and the radial size is limited, wh...

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Problems solved by technology

[0003] The general cycloidal pin wheel planetary reducer is mainly composed of input shaft, double eccentric sleeve, arm bearing, cycloidal wheel, pin tooth, column pin, column pin sleeve and output shaft, etc. The eccentric device in the reducer is the weak link , the arm bearing is inside the output mechanism on the cycloid wheel, and the radial size is limited, which limits the cycloid pin wheel planetary transmission to fully exert its carrying capacity, and at the same time, the axial size is relatively large

[0004] The double-crank ring-plate type pin pendulum planetary reducer retains the original cycloid pin wheel planetary reducer with a large number of meshing teeth at the same time, the angle between the total normal force and the total circumferential force is small, and the cycloid wheel and pin wheel teeth are hard tooth surfaces, etc. Essential advan

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