Pitch-play-removing elliptic gear transmission system separately inserting mechanism

Abstract

The invention discloses a pitch-play-removing elliptic gear transmission system separately inserting mechanism. A left transmission case and a right transmission case with the same structure are respectively arranged at both ends of the centre shaft, the central elliptic gear sleeved at both ends of the central shaft is fixedly connected with a frame by a flange, a middle elliptic gear and a planet elliptic gear are arranged at one side of the central elliptic gear in sequence or two middle elliptic gears and two planet elliptic gears are arranged at both sides of the central elliptic gear symmetrically in sequence; Viewed from the side, the axle centers of the central shaft, the middle shaft and the planet shaft are in triangle or the axle centers of the central shaft, two middle shafts and two planet shafts are arranged in two equilateral triangles vertically-opposite on the central shaft. Both ends of the central shaft are movably supported in the hole of the transmission case body by the shaft bossing of the adjusting sleeve, a gap delta is arranged between the shaft bossing of the adjusting sleeve and the hole, or a spring leaf is arranged in the middle hole of the transmission case body, for removing the gear side gap between the central gear, the middle gear and the planet gear. The invention has big gear modulus, little case body, the gear gap is adjustable, the transmission is stable, the transplanting open is little, the separately inserting mechanism can be used for a walking and seating transplanter.

Description

technical field [0001] The invention relates to agricultural machinery, in particular to an oval gear drive train splitting mechanism capable of eliminating backlash. Background technique [0002] In the existing published transplanting mechanism documents of rice transplanters, there are two arrangements of the central gear, the intermediate gear and the planetary gears in the elliptical gear transmission mechanism: linear and triangular. The advantage of linear arrangement is that the initial installation angle is easy to determine, and the design and calculation are more convenient. However, its volume and shape are relatively large, and it is only suitable for high-speed rice transplanters. Compared with the linear arrangement, the triangular shape can be designed to be smaller, and the gear modulus can be selected to be larger, which is conducive to improving the strength of the gear teeth. By optimizing the relevant parameters, it can be used for both walking rice tra...

AI Technical Summary

Problems solved by technology

[0003] There is no tooth backlash in the oval gear transmission mechanism from a theoretical point of view, but in practical applications, due to machining and assembly errors, as well as wear in use, the meshing backlash of the oval gears will occur, causing the planting arm to vibrate during work. This affects the uniformity of the amount of seedlings taken and the quality of transplanted rice seedlings

In the existing oval gear transmission mechanism, there is no device for eliminating backlash

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