Single-power-source rotary drawing opposite cutting type paddy field weeding device

Abstract

The invention relates to a single-power-source rotary drawing opposite cutting type paddy field weeding device. The single-power-source rotary drawing opposite cutting type paddy field weeding device comprises a rack, a driving and transmission device, a rotary disc drawing device and a rotary opposite cutting device. The rotary disc drawing device comprises a transverse moving clamping device and a rotary drawing device; the rotary bisection device comprises a bisection hooking and bearing device, a bidirectional rotary gear device and an opposite cutting device; under the driving of a single motor of the driving and transmission device, the transverse moving clamping device transversely moves to clamp weeds, the rotary drawing device synchronously rotates to draw the weeds, and the rotary disc drawing device alternately works to improve the weeding efficiency and reduce seedling damage; meanwhile, the transmission cylindrical cam drives a plurality of groups of beveled cutters to work alternately to cut up the pulled weeds so as to inhibit secondary growth of the weeds; the whole machine adopts a single-power-source design, a transmission system is simple, and efficient and high-quality weeding operation can be achieved. The invention provides a high-efficiency and low-secondary-growth-rate weeding device capable of continuously pulling and removing weeds and chopping weeds to inhibit secondary growth.

Description

Technical Field

[0001] The invention belongs to the field of agricultural machinery, and in particular relates to a single-power-source rotary pulling opposite-cutting paddy field weeding device. Background Art

[0002] Rice is one of the main food crops in my country. Increasing rice yield is of great significance to promoting rural economic development and ensuring national food security. Weeds in rice fields inhibit the growth of rice, increase the incidence of diseases and pests, and are the main reason affecting rice yield and quality. Compared with manual weeding and chemical weeding, mechanical weeding has gradually been widely used in paddy field weeding processes due to its advantages of high degree of automation, low environmental pollution and low application cost.

[0003] However, existing mechanical weeding methods mainly rely on the interaction between the weeding wheel and the soil to bury the weeds in water, which may not be able to completely kill the weeds, causing secondary growth of the weed roots, affecting the weeding effect; the pull-out weeding device can separate the weeds from the soil together with their roots, but the weeds that have been pulled out may fall back into the field and still have the possibility of growing; how to suppress the secondary growth of weeds while weeding once has become a key issue that needs to be solved urgently. Summary of the invention

[0004] In view of the above technical problems, the purpose of the present invention is to provide a single-power source rotary pulling opposite cutting paddy field weeding device; the weeds are clamped and pulled out by the pulling device, and the weeds are chopped by the matching cutting device to inhibit the secondary growth of the weeds; at the same time, the single-power source design is adopted, the transmission system of the whole machine is simple, and efficient and high-quality weeding operations can be achieved.

[0005] To achieve the above object, the present invention provides the following technical solutions: A single-power source rotary pulling opposite cutting paddy field weeding device can be hung on the rear end of a rice transplanter 5 to perform paddy field weeding operations, and is characterized in that it includes a frame 1, a driving and transmission device 2, a rotary disc pulling device 3 and a rotary cutting device 4.

[0006] The driving and transmission device 2 is fixedly connected to the frame 1, generates torque and transmits power to the rotating disc pulling device 3 and the rotary cutting device 4 installed at the bottom.

[0007] The frame 1 includes a main frame 1-1 and a mounting frame 1-2; there are 6 sets of mounting frames 1-2, which are equidistantly and fixedly connected to the lower end of the main frame 1-1 in parallel.

[0008] The driving and transmission device 2 includes a driving motor 2-1, a transmission shaft 2-2, a transmission cylindrical cam 2-3, a synchronous belt system 2-4 and a transverse moving frame 2-5.

[0009] The driving motor 2-1 is fixedly connected to the side of the frame 1, and its power output shaft transmits torque to the transmission shaft 2-2; there are 6 groups of synchronous belt systems 2-4, which are installed on the transmission shaft 2-2 together with the transmission cylindrical cam 2-3 through a key connection; the upper end of the transverse moving frame 2-5 is connected to the wheel groove of the transmission cylindrical cam 2-3.

[0010] The synchronous belt system 2-4 includes an upper pulley 2-4-1, a synchronous belt 2-4-2, a lower pulley 2-4-3 and a tensioning device 2-4-4; the upper pulley 2-4-1 is key-connected with the transmission shaft 2-2, and the power is transmitted to the lower pulley 2-4-3 through the synchronous belt 2-4-2; the tensioning device 2-4-4 is installed on the rear side of the frame and contacts with the synchronous belt 2-4-2 to keep the synchronous belt 2-4-2 tensioned.

[0011] There are 6 groups of the rotating disc pulling devices 3, each group includes a transverse moving clamping device 3-1 and a rotating pulling device 3-2.

[0012] The transversely movable clamping device 3-1 includes a clamping device frame 3-1-1 and a clamping disk 3-1-2; the upper end of the clamping device frame 3-1-1 is fixedly connected to the transversely movable frame 2-5 and moves together with the transversely movable frame 2-5; there are five clamping disks 3-1-2, which are fixedly connected to the lower side of the clamping device frame 3-1-1 at equal distances; each group of clamping disks 3-1-2 is provided with a cutting device mounting hole 3-1-3 on the upper side.

[0013] The rotary pulling device 3-2 includes a pulling device shaft 3-2-1 and a rotary pulling disc 3-2-2; the rotary pulling disc 3-2-2 has four pieces, which are fixedly connected to the pulling device shaft 3-2-1 at equal distances; one end of the pulling device shaft 3-2-1 is connected to the mounting frame 1-2, and the other end is key-connected to the lower pulley 2-4-3, and is driven by the lower pulley 2-4-3 to realize rotary motion.

[0014] There are 6 groups of the rotary cutting devices 4, each of which includes a cutting hook and carrying device 4-1, a two-way rotary gear device 4-2, and a cutting device 4-3.

[0015] The bisecting hanging and carrying device 4-1 includes a gear box 4-1-1 and a hanging frame 4-1-2; the hanging frame 4-1-2 is fixed to one end of the gear box 4-1-1 and one end of the bisecting device 4-3, and is connected to the transverse moving frame 2-5 by bolts, so that the bisecting hanging and carrying device 4-1 moves laterally with the transverse moving frame 2-5, thereby realizing synchronous transverse movement with the transverse moving clamping device 3-1.

[0016] The bidirectional rotating gear device 4-2 includes a fixed rack 4-2-1, a spur gear 4-2-2 and a bevel gear counter-rotation system 4-2-3; the fixed rack 4-2-1 is fixedly connected to the mounting frame 1-2 by screws and meshes with the spur gear 4-2-2; the spur gear 4-2-2 is connected and installed in the gear box 4-1-1 through a bearing seat; when the transverse moving frame 2-5 drives the gear box 4-1-1 to move laterally synchronously, the spur gear 4-2-2 moves laterally synchronously therewith and rotates under the action of the fixed rack 4-2-1.

[0017] The bevel gear counter-rotation system 4-2-3 includes a bevel gear rack 4-2-3-1, a top bevel gear 4-2-3-2, a distal rotating bevel gear 4-2-3-3 and a proximal rotating bevel gear 4-2-3-4; the bevel gear rack 4-2-3-1 is installed in the gear box 4-1-1, and the top bevel gear 4-2-3-2, the distal rotating bevel gear 4-2-3-3 and the proximal rotating bevel gear 4-2-3-4 are rotatably installed on the bevel gear rack 4-2-3-1.

[0018] The spur gear 4-2-2 is connected to the top bevel gear 4-2-3-2 through a shaft, so that the top bevel gear 4-2-3-2 rotates synchronously with the spur gear 4-2-2; the distal rotating bevel gear 4-2-3-3 and the proximal rotating bevel gear 4-2-3-4 are respectively meshed with the two sides of the top bevel gear 4-2-3-2, and rotate synchronously with the top bevel gear 4-2-3-2 to achieve reverse rotation.

[0019] The opposite cutting device 4-3 includes an inner shaft 4-3-1, an outer shaft 4-3-2 and a cutter 4-3-3; the inner shaft 4-3-1 and the outer shaft 4-3-2 pass through the mounting hole 3-1-3 of the opposite cutting device, one end of which is rotatably mounted in the mounting frame 4-1-2 through a bearing, and the other end is connected to the distal rotating bevel gear 4-2-3-3 and the proximal bevel gear 4-2-3-4 through a key and a coupling, respectively, to achieve synchronous reverse rotation.

[0020] There are 8 groups of the cutting knives 4-3-3, each including an inner shaft knife 4-3-3-1 and an outer shaft knife 4-3-3-2; all inner shaft knives 4-3-3-1 and outer shaft knives 4-3-3-2 are connected by screws and arranged in parallel on the inner shaft 4-3-1 and the outer shaft 4-3-2 and rotate synchronously therewith.

[0021] The distance L1 between two adjacent clamping discs 3-1-2 is 50-60 mm, which is 1 / 5 of the row spacing of rice seedlings; the distance between two adjacent rotating pulling discs 3-2-2 is L2, and L2=L1.

[0022] The distance L3 between the bottom ends of the clamping disc 3-1-2 and the rotating pulling disc 3-2-2 and the bottom end of the synchronous belt 2-4-2 is 60-70 mm.

[0023] The wheel groove of the transmission cylindrical cam 2-3 is divided into 8 strokes, the first rest stroke X1, corresponding to the rotation angle α1; the first feed stroke J1, corresponding to the rotation angle β1; the second rest stroke X2, corresponding to the rotation angle α2; the first retract stroke T1, corresponding to the rotation angle γ1; the third rest stroke X3, corresponding to the rotation angle α3; the second feed stroke J2, corresponding to the rotation angle β2; the fourth rest stroke X4, corresponding to the rotation angle α4; the second retract stroke T2, corresponding to the rotation angle γ2.

[0024] The sum of the rotation angles of any four consecutive strokes is 180°, the rotation angles α1, α2, α3, and α4 are equal, all of which are 70°-75°, and the rotation angles β1, β2, γ1, and γ2 are equal, all of which are 15°-20°.

[0025] In the first feed stroke J1, the first retract stroke T1, the second feed stroke J2 and the second retract stroke T2, the stroke distance of the transmission cylindrical cam 2-3 is L4, and L4=L1.

[0026] The cutting knife 4-3-3 has two static states, one is the state of waiting for cutting in which the inner axis knife 4-3-3-1 and the outer axis knife 4-3-3-2 are horizontal to the ground and are located at the front and rear sides of the inner axis 4-3-1 and the outer axis 4-3-2 respectively, and the other is the state of having been cut in which the inner axis knife 4-3-3-1 and the outer axis knife 4-3-3-2 overlap and are perpendicular to the ground.

[0027] In each group of rotating disc pulling devices 3, two groups of cutting knives 4-3-3 are arranged between two adjacent clamping discs 3-1-2; when the transmission cylindrical cam 2-3 is in the first rest stroke X1, the second rest stroke X2, the third rest stroke X3 and the fourth rest stroke X4, the two adjacent groups of cutting knives 4-3-3 are in different static states.

[0028] The width L5 of the inner shaft knife 4-3-3-1 and the outer shaft knife 4-3-3-2 is 35-40mm, the diameter D of the rotating drawing disc 3-2-2 is 280-290mm, and the distance L6 between the center of the rotating drawing disc 3-2-2 and the center of the inner shaft 4-3-1 and the outer shaft 4-3-2 is 230-240mm. When the inner shaft knife 4-3-3-1 and the outer shaft knife 4-3-3-2 of this size are in the process of switching from the waiting cutting state to the cutting state, when the inner shaft knife 4-3-3-1 and the outer shaft knife 4-3-3-2 rotate 45°, they will not collide or interfere with the rotating drawing disc 3-2-2.

[0029] Compared with the prior art, the present invention has the following beneficial effects: A pulling-shredding weeding operation with a high removal rate and a low secondary growth rate is achieved; the weeds are clamped when the clamping disc 3-1-2 contacts the rotating pulling disc 3-2-2 through the lateral movement of the clamping disc 3-1-2, and the weeds are pulled and separated from the soil as the rotating pulling disc 3-2-2 rotates, thereby achieving continuous weed clamping-pulling operation; at the same time, by optimizing the travel of the transmission cylindrical cam 2-3 and the structure of the rotary cutting device 4, the pulled weeds are chopped by the cutting knife 4-3-3 when the rotating pulling disc 3-2-2 is released away from the clamping disc 3-1-2, thereby inhibiting the secondary growth of the weeds; at the same time, since the pulling weeding only needs to clamp the upper end of the weeds without the need for the weeding parts to contact the soil, the seedling injury rate can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a single-power source rotary pulling opposite cutting paddy field weeding device of the present invention; Figure 2 It is a schematic diagram of the connection between a single-power-source rotary pulling opposite-cutting paddy field weeding device and a rice transplanter of the present invention; Figure 3 It is a schematic diagram of the structure of the frame 1 and the driving and transmission device 2 of the present invention; Figure 4 It is a schematic diagram of the rotary disc pulling device 3 and the rotary cutting device 4 of the present invention; Figure 5 It is a structural schematic diagram of the transverse moving clamping device 3-1 of the present invention; Figure 6 It is a structural schematic diagram of the rotary pulling device 3-2 of the present invention; Figure 7 It is a structural schematic diagram of the bisecting hooking and carrying device 4-1 of the present invention; Figure 8 It is a schematic structural diagram of the bidirectional rotary gear device 4-2 of the present invention; Fig. 9 It is a schematic structural diagram of the opposing cutting device 4-3 of the present invention; Fig.10 It is a schematic diagram of the travel of the transmission cylindrical cam 2-3 of the present invention; Fig.11 It is a schematic diagram of the dimensions of the inner shaft cutter 4-3-3-1, the outer shaft cutter 4-3-3-2 and the rotating drawing disc 3-2-2 of the present invention; Fig.12 This is the working process of the clamping disc 3-1-2, the rotating drawing disc 3-2-2 and the cutting knife 4-3-3 within different cam strokes of the present invention.

[0031] The reference numerals are Frame 1; main frame 1-1; mounting frame 1-2; drive and transmission device 2; drive motor 2-1; transmission shaft 2-2; transmission cylindrical cam 2-3; synchronous belt system 2-4; upper pulley 2-4-1; synchronous belt 2-4-2; lower pulley 2-4-3; tensioning device 2-4-4; lateral moving frame 2-5; rotating disc pulling device 3; lateral moving clamping device 3-1; clamping device frame 3-1-1; clamping disc 3-1-2; cutting device mounting hole 3-1-3; rotating pulling device 3-2; pulling device shaft 3-2-1; rotating Drawing disc 3-2-2; rotary cutting device 4; cutting hook and carrying device 4-1; gear box 4-1-1; hook frame 4-1-2; two-way rotary gear device 4-2; fixed rack 4-2-1; spur gear 4-2-2; bevel gear counter-rotation system 4-2-3; bevel gear frame 4-2-3-1; top bevel gear 4-2-3-2; distal rotating bevel gear 4-2-3-3; proximal rotating bevel gear 4-2-3-4; counter-cutting device 4-3; inner shaft 4-3-1; outer shaft 4-3-2; counter-cutting knife 4-3-3; inner shaft knife 4-3- 3-1; outer shaft knife 4-3-3-2; rice transplanter 5; first rest stroke X1; first rest stroke angle α1; first feed stroke J1; first feed stroke angle β1; second rest stroke X2; second rest stroke angle α2; first retract stroke T1; first retract stroke angle γ1; third rest stroke X3; third rest stroke angle α3; second feed stroke J2; second feed stroke angle β2; fourth third rest stroke X4; fourth rest stroke angle α4; second retract stroke T2; second retract stroke angle γ2; two adjacent clamping discs 3- The distance L1 between 1-2; the distance L2 between two adjacent rotating drawing discs 3-2-2; the distance L3 between the bottom of the clamping disc 3-1-2 and the rotating drawing disc 3-2-2 and the bottom of the synchronous belt 2-4-2; the distance L4 between the first feed stroke J1, the first retract stroke T1, the second feed stroke J2 and the second retract stroke T2 of the transmission cylindrical cam 2-3; the width L5 of the inner shaft knife 4-3-3-1 and the outer shaft knife 4-3-3-2; the distance L6 between the center of the rotating drawing disc 3-2-2 and the center of the inner shaft (4-3-1) and the outer shaft (4-3-2).

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] like Figure 1-2 As shown, a single-power source rotary pulling and opposite cutting paddy field weeding device can be hung on the rear end of a rice transplanter 5 to perform paddy field weeding operations, characterized in that it includes a frame 1, a driving and transmission device 2, a rotary disc pulling device 3 and a rotary cutting device 4; The driving and transmission device 2 is fixedly connected to the frame 1, generates torque and transmits power to the rotating disc pulling device 3 and the rotary cutting device 4 installed at the bottom.

[0034] like Figure 3 As shown, the rack 1 includes a main frame 1-1 and a mounting frame 1-2; there are 6 sets of mounting frames 1-2, which are equidistantly and side by side fixed to the lower end of the main frame 1-1; The driving and transmission device 2 includes a driving motor 2-1, a transmission shaft 2-2, a transmission cylindrical cam 2-3, a synchronous belt system 2-4 and a transverse moving frame 2-5; The driving motor 2-1 is fixedly connected to the side of the frame 1, and its power output shaft transmits torque to the transmission shaft 2-2; there are 6 sets of synchronous belt systems 2-4, which are installed on the transmission shaft 2-2 together with the transmission cylindrical cam 2-3 through a key connection; the upper end of the transverse moving frame 2-5 is connected to the wheel groove of the transmission cylindrical cam 2-3; The synchronous belt system 2-4 includes an upper pulley 2-4-1, a synchronous belt 2-4-2, a lower pulley 2-4-3 and a tensioning device 2-4-4; the upper pulley 2-4-1 is key-connected with the transmission shaft 2-2, and the power is transmitted to the lower pulley 2-4-3 through the synchronous belt 2-4-2; the tensioning device 2-4-4 is installed on the rear side of the frame and contacts with the synchronous belt 2-4-2 to keep the synchronous belt 2-4-2 tensioned.

[0035] like Figure 4-Figure 6 As shown, there are 6 groups of the rotating disc pulling devices 3, each group includes a transverse moving clamping device 3-1 and a rotating pulling device 3-2.

[0036] like Figure 5 As shown, the transversely movable clamping device 3-1 includes a clamping device frame 3-1-1 and a clamping disk 3-1-2; the upper end of the clamping device frame 3-1-1 is fixedly connected to the transversely movable frame 2-5, and moves together with the transversely movable frame 2-5; there are five clamping disks 3-1-2, which are fixedly connected to the lower side of the clamping device frame 3-1-1 at equal distances; and each group of clamping disks 3-1-2 is provided with a cutting device mounting hole 3-1-3 on the upper side.

[0037] like Figure 6 As shown, the rotary pulling device 3-2 includes a pulling device shaft 3-2-1 and a rotary pulling disc 3-2-2; the rotary pulling disc 3-2-2 has four pieces, which are fixedly connected to the pulling device shaft 3-2-1 at equal distances; one end of the pulling device shaft 3-2-1 is connected to the mounting frame 1-2, and the other end is key-connected to the lower pulley 2-4-3, and is driven by the lower pulley 2-4-3 to realize rotary motion.

[0038] like Figure 4As shown, the distance L3 between the bottom ends of the clamping disc 3-1-2 and the rotating pulling disc 3-2-2 and the bottom end of the synchronous belt 2-4-2 is 60-70 mm.

[0039] like Figure 5-Figure 6 The distance L1 between two adjacent clamping discs 3-1-2 is 50-60 mm, which is 1 / 5 of the row spacing of rice seedlings; the distance between two adjacent rotating pulling discs 3-2-2 is L2, and L2=L1.

[0040] like Figure 4 and Figure 7-Figure 9 As shown, there are 6 groups of the rotary cutting devices 4, each of which includes a cutting hook and carrying device 4-1, a two-way rotary gear device 4-2, and a counter-cutting device 4-3.

[0041] like Figure 7 As shown, the bisecting hanging and carrying device 4-1 includes a gear box 4-1-1 and a hanging frame 4-1-2; the hanging frame 4-1-2 is fixed to one end of the gear box 4-1-1 and one end of the opposite cutting device 4-3, and is connected to the transverse moving frame 2-5 by bolts, so that the bisecting hanging and carrying device 4-1 moves laterally with the movement of the transverse moving frame 2-5, thereby realizing synchronous transverse movement with the transverse moving clamping device 3-1.

[0042] like Figure 8 As shown, the bidirectional rotating gear device 4-2 includes a fixed rack 4-2-1, a spur gear 4-2-2 and a bevel gear counter-rotation system 4-2-3; the fixed rack 4-2-1 is fixedly connected to the mounting frame 1-2 by screws and meshes with the spur gear 4-2-2; the spur gear 4-2-2 is connected and installed in the gear box 4-1-1 through a bearing seat; when the transverse moving frame 2-5 drives the gear box 4-1-1 to move laterally synchronously, the spur gear 4-2-2 moves laterally synchronously therewith and rotates under the action of the fixed rack 4-2-1.

[0043] like Fig. 9 As shown, the bevel gear counter-rotation system 4-2-3 includes a bevel gear frame 4-2-3-1, a top bevel gear 4-2-3-2, a distal rotating bevel gear 4-2-3-3 and a proximal rotating bevel gear 4-2-3-4; the bevel gear frame 4-2-3-1 is installed in the gear box 4-1-1, and the top bevel gear 4-2-3-2, the distal rotating bevel gear 4-2-3-3 and the proximal rotating bevel gear 4-2-3-4 are rotatably installed on the bevel gear frame 4-2-3-1; The spur gear 4-2-2 is connected to the top bevel gear 4-2-3-2 through a shaft, so that the top bevel gear 4-2-3-2 rotates synchronously with the rotation of the spur gear 4-2-2; the distal rotating bevel gear 4-2-3-3 and the proximal rotating bevel gear 4-2-3-4 are respectively meshed with the two sides of the top bevel gear 4-2-3-2, and rotate synchronously with the rotation of the top bevel gear 4-2-3-2 to achieve reverse rotation; like Fig. 9 As shown, the opposing cutting device 4-3 includes an inner shaft 4-3-1, an outer shaft 4-3-2 and an opposing cutting knife 4-3-3; the inner shaft 4-3-1 and the outer shaft 4-3-2 pass through the opposing cutting device mounting hole 3-1-3, one end of which is rotatably mounted in the mounting frame 4-1-2 through a bearing, and the other end is connected to the distal rotating bevel gear 4-2-3-3 and the proximal bevel gear 4-2-3-4 through a key and a coupling, respectively, to achieve synchronous reverse rotation.

[0044] There are 8 groups of the cutting knives 4-3-3, each including an inner shaft knife 4-3-3-1 and an outer shaft knife 4-3-3-2; all inner shaft knives 4-3-3-1 and outer shaft knives 4-3-3-2 are connected by screws and arranged in parallel on the inner shaft 4-3-1 and the outer shaft 4-3-2 and rotate synchronously therewith.

[0045] like Fig.10 As shown, the wheel groove of the transmission cylindrical cam 2-3 is divided into 8 strokes, the first rest stroke X1, corresponding to the rotation angle α1; the first feed stroke J1, corresponding to the rotation angle β1; the second rest stroke X2, corresponding to the rotation angle α2; the first retract stroke T1, corresponding to the rotation angle γ1; the third rest stroke X3, corresponding to the rotation angle α3; the second feed stroke J2, corresponding to the rotation angle β2; the fourth rest stroke X4, corresponding to the rotation angle α4; the second retract stroke T2, corresponding to the rotation angle γ2; The sum of the rotation angles of any four consecutive strokes is 180°, the rotation angles α1, α2, α3, and α4 are equal, all of which are 70°-75°, and the rotation angles β1, β2, γ1, and γ2 are equal, all of which are 15°-20°; In the first feed stroke J1, the first retract stroke T1, the second feed stroke J2 and the second retract stroke T2, the travel distance of the transmission cylindrical cam 2-3 is L4, L4=L1; The cutting knife 4-3-3 has two static states, one is the state of waiting for cutting in which the inner axis knife 4-3-3-1 and the outer axis knife 4-3-3-2 are horizontal to the ground and are located at the front and rear sides of the inner axis 4-3-1 and the outer axis 4-3-2 respectively, and the other is the state of having been cut in which the inner axis knife 4-3-3-1 and the outer axis knife 4-3-3-2 overlap and are perpendicular to the ground.

[0046] In each group of rotating disc pulling devices 3, two groups of cutting knives 4-3-3 are arranged between two adjacent clamping discs 3-1-2; when the transmission cylindrical cam 2-3 is in the first rest stroke X1, the second rest stroke X2, the third rest stroke X3 and the fourth rest stroke X4, the two adjacent groups of cutting knives 4-3-3 are in different static states.

[0047] like Fig.11 As shown, the width L5 of the inner shaft knife 4-3-3-1 and the outer shaft knife 4-3-3-2 is 35-40mm, the diameter D of the rotating drawing disc 3-2-2 is 280-290mm, and the distance L6 between the center of the rotating drawing disc 3-2-2 and the center of the inner shaft 4-3-1 and the outer shaft 4-3-2 is 230-240mm. When the inner shaft knife 4-3-3-1 and the outer shaft knife 4-3-3-2 of this size are in the process of switching from the waiting cutting state to the cutting state, when the inner shaft knife 4-3-3-1 and the outer shaft knife 4-3-3-2 rotate 45°, they will not collide or interfere with the rotating drawing disc 3-2-2.

[0048] The specific implementation principle process is as follows: The initial state is when the left end surface of the clamping disc 3-1-2 is in contact with the left rotating and pulling disc 3-2-2, that is, the single-power source rotating and pulling opposite-cutting paddy field weeding device of the present invention is in the state of Fig.12 In the initial state shown, with the forward direction of the rice transplanter 5 as the front, from left to right the 1st, 3rd, 5th, and 7th groups of cutters 4-3-3 are in the cutting state, the 2nd, 4th, 6th, and 8th groups of cutters 4-3-3 are in the waiting state, and the transmission cylindrical cam 2-3 is in the first rest stroke X1.

[0049] Starting from the initial state, the transmission cylindrical cam 2-3 rotates; when the transmission cylindrical cam 2-3 is in the first rest stroke X1.

[0050] As the rice transplanter 5 moves forward, the weeds enter the clamping space formed between the right end surface of the clamping disc 3-1-2 and the right rotating pulling disc 3-2-2; The driving motor 2-1 drives the transmission shaft 2-2 to rotate, and the power is transmitted to the drawing device shaft 3-2-1 through the transmission shaft 2-2 and the synchronous belt system 2-4, so that the rotating drawing disc 3-2-2 rotates.

[0051] As the transmission cylindrical cam 2-3 rotates, it enters the first feed stroke J1.

[0052] The transmission cylindrical cam 2-3 drives the lateral moving frame 2-5 to move horizontally to the right, so that the left end surface of the clamping disk 3-1-2 is separated from the left rotating pulling disk 3-2-2 that is in contact with it, and moves to the right rotating pulling disk 3-2-2; During this process, the right end surface of the clamping disc 3-1-2 and the rotating pulling disc 3-2-2 on its right side gradually approach and fit together at the end of the feeding stroke J1, clamping the weeds in the clamping space to complete the weed clamping operation; As the lateral moving frame 2-5 moves to the right, the spur gear 4-2-2 moves to the right synchronously, and rotates under the action of the fixed rack 4-2-1, driving the bevel gear counter-rotation system 4-2-3 to rotate; The 1, 3, 5, 7 sets of cutters 4-3-3 rotate away from the cutting state in the same axis in the opposite direction, and enter the waiting-for-cutting state at the end of the feed stroke J1 to prevent interference with the rotating drawing disc 3-2-2; The 2nd, 4th, 6th and 8th groups of cutters 4-3-3 rotate coaxially in the opposite direction from the ready-to-cut state and enter the cutting state at the end of the feed stroke J1.

[0053] As the transmission cylindrical cam 2-3 rotates, it enters the second rest stroke X2.

[0054] The right end surface of the clamping disc 3-1-2 is in contact with the rotating pulling disc 3-2-2 on its right side. When the rotating pulling disc 3-2-2 rotates clockwise, the clamped weeds move upward along with the rotating pulling disc 3-2-2, completing the weed pulling operation. In the second rest stroke X2, the left end surface of the clamping disk 3-1-2 and the rotating pulling disk 3-2-2 on its left side form a clamping space.

[0055] As the transmission cylindrical cam 2-3 rotates, it enters the first retracting stroke T1; The transmission cylindrical cam 2-3 drives the lateral moving frame 2-5 to move horizontally to the left, so that the right end surface of the clamping disk 3-1-2 is separated from the rotating pulling disk 3-2-2 on the right side thereof, and moves toward the rotating pulling disk 3-2-2 on the right side; At this time, the weeds being clamped and pulled are between the clamping disk 3-1-2 and the upper part of the rotating pulling disk 3-2-2; the 1st, 3rd, 5th, and 7th groups of cutters 4-3-3 rotate coaxially in the opposite direction from the ready-to-cut state to approach, cut the weeds between the clamping disk 3-1-2 and the upper part of the rotating pulling disk 3-2-2, and realize the cutting and crushing of the weeds; During the first retracting stroke T1, the left end surface of the clamping disk 3-1-2 is in contact with and clamps the weeds with its left rotating pulling disk 3-2-2; at the end of the first retracting stroke T1, a clamping space is formed between the right end surface of the clamping disk 3-1-2 and its right rotating pulling disk 3-2-2.

[0056] The transmission cylindrical cam 2-3 rotates and enters the third rest stroke X3.

[0057] At this time, the state of the machine is the same as that in the third rest stroke X1, and the left end surface of the clamping disc 3-1-2 is in contact with the left rotating pulling disc 3-2-2 and the clamped weeds are pulled out.

[0058] The transmission cylindrical cam 2-3 rotates and enters the second feed stroke J2.

[0059] At this time, the machine state is the same as that in the first feeding stroke J1, and the weeds pulled by the left end surface of the clamping disk 3-1-2 and the left rotating pulling disk 3-2-2 are cut by the 1st, 3rd, 5th, and 7th groups of cutting knives 4-3-3.

[0060] The transmission cylindrical cam 2-3 rotates and enters the fourth rest stroke X4.

[0061] At this time, the machine state is the same as that in the second feed stroke X2.

[0062] The transmission cylindrical cam 2-3 rotates and enters the second retract stroke T2.

[0063] At this time, the state of the machine is the same as that in the first retracting stroke T1.

[0064] As the transmission cylindrical cam 2-3 rotates, the clamping disc 3-1-2 and the rotating pulling discs 3-2-2 on both sides thereof alternately clamp and pull the weeds, and the 1st, 3rd, 5th, 7th groups of cutting knives 4-3-3 and the 2nd, 4th, 6th, 8th groups of cutting knives 4-3-3 alternately cut the weeds.

[0065] The above embodiments are only used to illustrate the present invention, wherein the structures and connection modes of the components may be changed. Any equivalent transformations and improvements based on the technical solution of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A single-power source rotary pulling opposite cutting paddy field weeding device, which can be hung on the rear end of a rice transplanter (5) to perform paddy field weeding operations, characterized in that: It comprises a frame (1), a driving and transmission device (2), a rotating disc pulling device (3) and a rotary cutting device (4); The driving and transmission device (2) is fixedly connected to the frame (1), generates torque and transmits power to the rotating disc pulling device (3) and the rotary cutting device (4) installed at the bottom; The frame (1) comprises a main frame body (1-1) and a mounting frame body (1-2); there are 6 groups of mounting frames (1-2) which are fixedly connected to the lower end of the main frame body (1-1) in parallel and at equal distances; The driving and transmission device (2) comprises a driving motor (2-1), a transmission shaft (2-2), a transmission cylindrical cam (2-3), a synchronous belt system (2-4) and a transverse moving frame (2-5); The driving motor (2-1) is fixedly connected to the side of the frame (1), and its power output shaft transmits torque to the transmission shaft (2-2); the synchronous belt system (2-4) has 6 groups in total, and is installed on the transmission shaft (2-2) through a key connection together with the transmission cylindrical cam (2-3); the upper end of the transverse moving frame (2-5) is connected to the wheel groove of the transmission cylindrical cam (2-3); The synchronous belt system (2-4) comprises an upper pulley (2-4-1), a synchronous belt (2-4-2), a lower pulley (2-4-3) and a tensioning device (2-4-4); the upper pulley (2-4-1) is key-connected to the transmission shaft (2-2), and power is transmitted to the lower pulley (2-4-3) through the synchronous belt (2-4-2); the tensioning device (2-4-4) is installed on the rear side of the frame and contacts the synchronous belt (2-4-2) to keep the synchronous belt (2-4-2) tensioned; The rotating disc pulling device (3) comprises 6 groups in total, each group comprising a transverse moving clamping device (3-1) and a rotating pulling device (3-2); The transversely movable clamping device (3-1) comprises a clamping device frame (3-1-1) and a clamping disc (3-1-2); the upper end of the clamping device frame (3-1-1) is fixedly connected to the transversely movable frame (2-5) and moves together with the transversely movable frame (2-5); there are five clamping discs (3-1-2) fixedly connected to the lower side of the clamping device frame (3-1-1) at equal distances; and a cutting device mounting hole (3-1-3) is provided on the upper side of each set of clamping discs (3-1-2); The rotary pulling device (3-2) comprises a pulling device rotating shaft (3-2-1) and a rotary pulling disc (3-2-2); the rotary pulling disc (3-2-2) has four discs, which are fixedly connected to the pulling device rotating shaft (3-2-1) at equal distances; one end of the pulling device rotating shaft (3-2-1) is connected to the mounting frame (1-2), and the other end is key-connected to the lower pulley (2-4-3), and is driven by the lower pulley (2-4-3) to achieve rotary motion; The rotary cutting device (4) has a total of 6 groups, each comprising a cutting hook and carrying device (4-1), a bidirectional rotary gear device (4-2), and a cutting device (4-3); The bisecting hanging and carrying device (4-1) comprises a gear box (4-1-1) and a hanging frame (4-1-2); the hanging frame (4-1-2) is fixedly connected to one end of the gear box (4-1-1) and one end of the bisecting cutting device (4-3), and is connected to the transverse moving frame (2-5) by bolts, so that the bisecting hanging and carrying device (4-1) moves transversely with the transverse moving frame (2-5), thereby realizing synchronous transverse movement with the transverse moving clamping device (3-1); The bidirectional rotating gear device (4-2) comprises a fixed rack (4-2-1), a spur gear (4-2-2) and a bevel gear counter-rotation system (4-2-3); the fixed rack (4-2-1) is fixedly connected to the mounting frame (1-2) by screws and meshes with the spur gear (4-2-2); the spur gear (4-2-2) is connected and installed in the gear box (4-1-1) by a bearing seat; when the lateral moving frame (2-5) drives the gear box (4-1-1) to move horizontally synchronously, the spur gear (4-2-2) moves horizontally synchronously therewith and rotates under the action of the fixed rack (4-2-1); The bevel gear counter-rotation system (4-2-3) comprises a bevel gear rack (4-2-3-1), a top bevel gear (4-2-3-2), a distal rotating bevel gear (4-2-3-3) and a proximal rotating bevel gear (4-2-3-4); the bevel gear rack (4-2-3-1) is installed in a gear box (4-1-1), and the top bevel gear (4-2-3-2), the distal rotating bevel gear (4-2-3-3) and the proximal rotating bevel gear (4-2-3-4) are rotatably installed on the bevel gear rack (4-2-3-1); The spur gear (4-2-2) and the top bevel gear (4-2-3-2) are connected via a shaft, so that the top bevel gear (4-2-3-2) rotates synchronously with the rotation of the spur gear (4-2-2); the distal rotating bevel gear (4-2-3-3) and the proximal rotating bevel gear (4-2-3-4) are respectively meshed with the two sides of the top bevel gear (4-2-3-2), and rotate synchronously with the top bevel gear (4-2-3-2) to achieve reverse rotation; The opposing cutting device (4-3) comprises an inner shaft (4-3-1), an outer shaft (4-3-2) and an opposing cutting knife (4-3-3); the inner shaft (4-3-1) and the outer shaft (4-3-2) pass through the opposing cutting device mounting hole (3-1-3), one end of which is rotatably mounted in the mounting frame (4-1-2) via a bearing, and the other end of which is respectively connected to the distal rotating bevel gear (4-2-3-3) and the proximal bevel gear (4-2-3-4) via a key and a coupling to achieve synchronous reverse rotation; There are a total of 8 groups of the cutting knives (4-3-3), each of which includes an inner shaft knife (4-3-3-1) and an outer shaft knife (4-3-3-2); all the inner shaft knives (4-3-3-1) and the outer shaft knives (4-3-3-2) are installed on the inner shaft (4-3-1) and the outer shaft (4-3-2) in parallel through screw connection and rotate synchronously therewith.

2. A single-power source rotary pulling opposite cutting paddy field weeding device according to claim 1, characterized in that: The distance L1 between the two adjacent clamping discs (3-1-2) is 50-60 mm, which is 1 / 5 of the row spacing of rice seedlings; the distance between the two adjacent rotating pulling discs (3-2-2) is L2, L2=L1; The distance L3 between the bottom ends of the clamping disc (3-1-2) and the rotating pulling disc (3-2-2) and the bottom end of the synchronous belt (2-4-2) is 60-70 mm.

3. A single-power source rotary pulling opposite cutting paddy field weeding device according to claim 2, characterized in that: The wheel groove of the transmission cylindrical cam (2-3) is divided into 8 strokes, the first rest stroke X1 corresponds to the rotation angle α1; the first feed stroke J1 corresponds to the rotation angle β1; the second rest stroke X2 corresponds to the rotation angle α2; the first retraction stroke T1 corresponds to the rotation angle γ1; the third rest stroke X3 corresponds to the rotation angle α3; the second feed stroke J2 corresponds to the rotation angle β2; the fourth rest stroke X4 corresponds to the rotation angle α4; the second retraction stroke T2 corresponds to the rotation angle γ2; The sum of the rotation angles of any four consecutive strokes is 180°, the rotation angles α1, α2, α3, and α4 are equal, all of which are 70°-75°, and the rotation angles β1, β2, γ1, and γ2 are equal, all of which are 15°-20°; In the first feed stroke J1, the first retract stroke T1, the second feed stroke J2 and the second retract stroke T2, the stroke distance of the transmission cylindrical cam (2-3) is L4, and L4=L1.

4. A single-power source rotary pulling opposite cutting paddy field weeding device according to claim 3, characterized in that: The cutting knives (4-3-3) have two static states, one is a state in which the inner axis knife (4-3-3-1) and the outer axis knife (4-3-3-2) are horizontal to the ground and are respectively located at the front and rear sides of the inner axis (4-3-1) and the outer axis (4-3-2) to be cut, and the other is a state in which the inner axis knife (4-3-3-1) and the outer axis knife (4-3-3-2) are overlapped and perpendicular to the ground and have been cut; In each set of rotating disc pulling devices (3), two sets of cutting knives (4-3-3) are arranged between two adjacent clamping discs (3-1-2); when the transmission cylindrical cam (2-3) is in a first rest stroke X1, a second rest stroke X2, a third rest stroke X3 and a fourth rest stroke X4, the two adjacent sets of cutting knives (4-3-3) are in different static states.

5. A single-power source rotary pulling opposite cutting paddy field weeding device according to claim 4, characterized in that: The width L5 of the inner shaft knife (4-3-3-1) and the outer shaft knife (4-3-3-2) is 35-40 mm, the diameter D of the rotating drawing disc (3-2-2) is 280-290 mm, and the distance L6 between the center of the rotating drawing disc (3-2-2) and the center of the inner shaft (4-3-1) and the outer shaft (4-3-2) is 230-240 mm. When the inner shaft knife (4-3-3-1) and the outer shaft knife (4-3-3-2) of this size are turned from a waiting state to a cutting state, the inner shaft knife (4-3-3-1) and the outer shaft knife (4-3-3-2) do not collide with or interfere with the rotating drawing disc (3-2-2) when they rotate 45°.

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