Column gear-noncircular gear drive system transplanting mechanism capable of eliminating pitch play

Abstract

The present invention discloses a cylindrical gear non- cylindrical transmission system separating insertion mechanism which can eliminate tooth space. A central cylindrical gear which is freely sleeved on two ends of central shaft is fixedly connected with the frame through a flange. Two sides of central cylindrical gear are symmetrically distributed with an intermediate shaft and a planet shaft. The intermediate cylindrical gear and intermediate non-cylindrical are respectively engaged with the central cylindrical gear and planet non-cylindrical gear. One end of planet shaft is fixed with a planting arm. The shaft center of five shafts are arranged with two congruence triangles which are opposite through the intermediate shaft when seen from the side surface. Two ends of intermediate shaft are movably supported in the base hole of transmission box body through a bearing and a clearance delta is provided. An adjusting screw is radially installed along the intermediate shaft hole on the transmission box body, or one side in the bearing base hole is installed with a spring piece which presses against the outer ring of bearing for eliminating the tooth side clearance among the intermediate gear, the central gear and the planet gear. The cylindrical gear non- cylindrical transmission system separating insertion mechanism of the invention has the advantages of tooth space elimination, smooth transmission, small seedling insertion cavity and good erection property of seedling. The cylindrical gear non- cylindrical transmission system separating insertion mechanism of the invention is especially suitable for the requirement of high-speed seedling transplanter.

Description

technical field [0001] The invention relates to agricultural machinery, in particular to a cylindrical tooth-non-circular gear drive train splitting mechanism for a rice transplanter which can eliminate backlash. Background technique [0002] In the existing published literature on the transplanting mechanism of the rice transplanter, the arrangement of the central gear, the intermediate gear and the planetary gear in the cylindrical tooth-non-circular gear transmission system is mainly linear. 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. [0003] There is no tooth backlash in the cylindrical tooth-non-circular 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,...

AI Technical Summary

Problems solved by technology

[0003] There is no tooth backlash in the cylindrical tooth-non-circular 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 cylindrical tooth gear and the non-circular gear will produce tooth backlash when meshing. , causing the planting arm to vibrate during work, which affects the uniformity of the amount of seedlings taken and the quality of transplanted seedlings

In the existing linear arrangement of cylindrical teeth-non-circular gear transmission system, it is not conducive to install a device for eliminating backlash

Images