US 12,349,612 B2
Weeding machine and weeding method for seedlings in paddy field
Dongdong Du, Hangzhou (CN); Jun Wang, Hangzhou (CN); Zhenbo Wei, Hangzhou (CN); and Dongfang Li, Hangzhou (CN)
Assigned to ZHEJIANG UNIVERSITY, Hangzhou (CN)
Filed by ZHEJIANG UNIVERSITY, Hangzhou (CN)
Filed on Sep. 30, 2022, as Appl. No. 17/956,856.
Application 17/956,856 is a continuation of application No. PCT/CN2020/117562, filed on Sep. 25, 2020.
Claims priority of application No. 202010753597.2 (CN), filed on Jul. 30, 2020.
Prior Publication US 2023/0021925 A1, Jan. 26, 2023
Int. Cl. A01B 39/18 (2006.01); A01D 34/53 (2006.01); A01D 45/04 (2006.01); A01M 21/02 (2006.01)
CPC A01B 39/18 (2013.01) [A01D 34/53 (2013.01); A01D 45/04 (2013.01); A01M 21/02 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A weeding machine for seedlings in a paddy field, comprising a paddy field power chassis, a lifting hydraulic cylinder, a parallelogram suspension frame, a weeding frame, a transmission assembly, and weeding units,
wherein a first end of the lifting hydraulic cylinder is connected with the paddy field power chassis, a second end of the lifting hydraulic cylinder is connected with the parallelogram suspension frame, a first end of the parallelogram suspension frame is connected with the paddy field power chassis, a second end of the parallelogram suspension frame is connected with the weeding frame, and each of the transmission assembly and each of the weeding units is mounted on the weeding frame;
wherein the transmission assembly comprises a transmission spindle, a cover plate, a transmission shaft I, a transmission shaft II, a power input shaft, a transmission shaft III, a transmission shaft IV, and weeding unit spindles, wherein
a first end of the transmission spindle is connected with the paddy field power chassis, a second end of the transmission spindle is connected with the power input shaft, each of the transmission shaft II and the transmission shaft III is connected with the power input shaft through a first chain transmission, the transmission shaft I is connected with the transmission shaft II through a second chain transmission, the transmission shaft IV is connected with the transmission shaft III through a third chain transmission, each of the transmission shaft I, the transmission shaft II, the transmission shaft III and the transmission shaft IV is connected with each of the weeding unit spindles through a fourth chain transmission, and the cover plate is connected with the weeding frame;
wherein each of the weeding units comprises a floating plate frame, floating plates, the weeding unit spindle, a spiral weed chopping knife, a weed chopping channel, a weeding unit frame, a worm transmission case I, weed collecting screws, weed collecting inverted teeth, a weed collecting spiral shaft, a feeding channel, a discharge opening, a bidirectional variable-pitch auger, an auger shaft, a worm transmission case II, and a feeding shaft, wherein
the floating plate frame is connected with the weeding frame, each of the floating plates is connected with the floating plate frame, each of the weeding unit spindles is connected with each of the weed chopping channels, each of the weed chopping channels is connected with each of the weeding unit frames, each of the weeding unit frames is connected with the weeding frame, each of the spiral weed chopping knives is connected with each of the weeding unit spindles, a first end of the worm transmission case I is connected with each of the weeding unit spindles, a second end of the worm transmission case I is connected with each of the weed collecting spiral shafts, each of the weed collecting screws is connected with each of the weed collecting spiral shafts, each of the weed collecting inverted teeth is mounted on each of the weed collecting screws, each of the feeding channels is connected with each of the weed chopping channels, each of the discharge openings is connected with each of the feeding channels, each of the auger shafts is connected with each of the feeding channels, each of the bidirectional variable-pitch augers is connected with each of the auger shafts, a first end of the worm transmission case II is connected with each of the auger shafts, a second end of the worm transmission case II is connected with each of the feeding shafts, and each of the feeding shafts is connected with each of the weeding unit spindles through a fifth chain transmission.