Deformed eccentric circular-noncircular gear rotary transplanting mechanism of sitting transplanter

Abstract

The invention discloses a deformed eccentric circular-noncircular gear rotary transplanting mechanism of a sitting transplanter. A central chain wheel in a chain wheel box drives a left gear box and a right gear box which have the same structures, to rotate, a central deformed eccentric circular gear in the chain wheel box is fixed, two conjugate noncircular gears which are meshed with the both sides of the central deformed eccentric circular gear rotate with the gear boxes and are respectively meshed with planetary deformed eccentric circular gears, the rotation centers of the five gears areon the same straight line, and the planetary deformed eccentric circular gears perform uniform rotation along with the gear boxes and then perform non-uniform rotation relatively to the gear boxes. The absolute motion of a pair of planting arms which are fixedly connected with the planetary deformed eccentric circular gears through planetary shafts is non-uniform swinging, namely the compound motion containing the circular motion of the gear boxes around a central shaft and the non-uniform rotation of the planetary deformed eccentric circular gears relatively to the gear boxes; proper structural parameters are selected; and planting needles on the planting arms form a kidney-shaped working trajectory, and the front-planting operation demand of the transplanter can be met.

Description

Technical field [0001] The invention relates to an agricultural machine, in particular to a deformed eccentric circle-non-circular gear rotating separating and planting mechanism of a riding rice transplanter. Background technique [0002] At present, there are mainly two types of planting mechanisms for walking rice transplanters on the market: crank-rocker type transplanting mechanism and rotary type transplanting mechanism. Compared with the crank-rocker-type separating-planting mechanism, the rotary-type separating-planting mechanism has the advantages of small inertia force, small vibration and good stability. The non-circular gear transmission has the characteristics of stable transmission, compact structure, high motion precision, easy to achieve dynamic balance to reduce inertial force, etc., and gradually replaces the original crank-rocker type inserting mechanism. Currently used in rotary inserting mechanism, there are mainly elliptical gears, eccentric gears, eccentri...

AI Technical Summary

Problems solved by technology

The traditional eccentric circular gear insertion mechanism was invented in Japan. The mechanism is composed of 9 eccentric gears. Since the gear clearance will change during the transmission of the eccentric gears, causing vibration and impact, the mechanism uses two dimple spring devices. To eliminate the gear gap, the structure is complex

Finally, an eccentric non-circular conjugate gear was proposed to eliminate the gear gap, but the relative speed of the seedling needles during the operation of the entire sub-insertion mechanism was relatively fast, which caused great damage to the seedlings.

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