Method for designing non-circular gear planetary system through Fourier function segment transmission ratios

A segmented transmission ratio, non-circular gear technology, applied in planting methods, transmissions, gear transmissions, etc., can solve the problem that it is difficult to find non-circular gear pitch curve function expressions, designers have high experience requirements, and it is difficult to Find the needle trajectory of the planting mechanism and other problems

Active Publication Date: 2014-07-23
ZHEJIANG SCI-TECH UNIV
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[0003] The disadvantage of this method is that the basic shape of the static trajectory of the seedling needle of the rotary transplanting mechanism is limited by the function expression of the pitch curve of the non-circular gear, and it is difficult to find the ideal point only by changing the parameters of the function expression of the pitch...

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  • Method for designing non-circular gear planetary system through Fourier function segment transmission ratios
  • Method for designing non-circular gear planetary system through Fourier function segment transmission ratios
  • Method for designing non-circular gear planetary system through Fourier function segment transmission ratios

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[0038] In order to make the present invention more comprehensible, it will be described in detail as follows in conjunction with the embodiments and accompanying drawings.

[0039] The rotary splitting mechanism of the high-speed rice transplanter is mainly composed of a sun gear 1, a first middle wheel 2, a second middle wheel 4, a first planetary wheel 3, a second planetary wheel 5, a first needle 6, and a second needle 8 and a gear box 7; the gear box 7 is a planet carrier H, and the rotation axes of the sun gear 1, the first intermediate gear 2, the second intermediate gear 4, the first planetary gear 3, and the second planetary gear 5 are located on the same straight line , the sun gear 1 is fixedly connected to the frame, its rotation axis coincides with the rotation center of the planet carrier H, and the rotation center D of the first intermediate gear 2 is in the middle of the rotation center O of the sun gear 1 and the rotation center A of the first planetary gear 3 ...

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Abstract

The invention discloses a method for designing a non-circular gear planetary system through Fourier function segment transmission ratios. The method includes the steps that according to the structural symmetry characteristic of a planetary gear system of a rotary type transplanting mechanism, a transmission ratio between non-circular gears is segmented at the 180-degree position, and the relation among the segment transmission ratios of the planetary gear system is constructed; under the condition of meeting the total transmission ratio of the gear system, in order to solve the problem that effective equations for solving the segment transmission ratios are not enough, the Fourier hypothesis of the non-circular gear segment transmission ratios is provided, and other transmission ratios are distributed successfully; through mirror image, weighting, iterating and fitting processing performed on the segment transmission ratios, an ideal transmission ratio is obtained finally, and therefore a non-circular gear pitch curve is obtained. The method is simple in process, small in calculation amount and high in efficiency, and the designed non-circular gear transplanting mechanism is highly targeted.

Description

technical field [0001] The invention relates to a rice planting machine, in particular to a method for designing a non-circular gear planetary system based on a Fourier function segmental transmission ratio. Background technique [0002] The current design method of the rotary sub-insertion mechanism is to preliminarily select a pitch curve function expression of a non-circular gear (such as an elliptic pitch curve), establish the motion equation of the rotary sub-insertion mechanism, and simulate the needle movement trajectory of the sub-insertion mechanism , select the parameters of the better non-circular gear pitch curve function expression to meet the design requirements. [0003] The disadvantage of this method is that the basic shape of the static trajectory of the seedling needle of the rotary transplanting mechanism is limited by the function expression of the pitch curve of the non-circular gear, and it is difficult to find the ideal point only by changing the para...

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Application Information

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IPC IPC(8): F16H1/28A01C11/02
CPCA01C11/006A01C11/02F16H1/28
Inventor 李革应孔月张继钊张雷王益君
Owner ZHEJIANG SCI-TECH UNIV
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