A single-power-source rotary pulling counter-cutting paddy field weeding device

Abstract

This invention relates to a single-power-source rotary pulling and counter-cutting weeding device for paddy fields, comprising a frame, a drive and transmission device, a rotary disc pulling device, and a rotary counter-cutting device. The rotary disc pulling device includes a lateral moving clamping device and a rotary pulling device, while the rotary counter-cutting device includes a counter-cutting hook and bearing device, a bidirectional rotary gear device, and a counter-cutting device. Driven by a single motor in the drive and transmission device, the lateral moving clamping device moves laterally to clamp weeds, while the rotary pulling device rotates synchronously to pull out the weeds. The alternating operation of the rotary disc pulling device improves weeding efficiency and reduces seedling damage. Simultaneously, a transmission cylindrical cam drives multiple sets of counter-cutting blades to work alternately, chopping the pulled-out weeds to inhibit secondary growth. The entire machine adopts a single-power-source design, with a simple transmission system, enabling efficient and high-quality weeding operations. This invention provides a highly efficient weeding device that continuously pulls out weeds, chops weeds, and inhibits secondary growth, resulting in a low secondary growth rate.

Description

[0001] This invention belongs to the field of agricultural machinery, specifically relating to a single-power-source rotary pulling counter-cutting paddy field weeding device. Background Technology

[0002] Rice is one of my country's main food crops, and increasing rice yield is of great significance for promoting rural economic development and ensuring national food security. Weeds in paddy fields inhibit rice growth and increase the incidence of pests and diseases, which are major factors affecting rice yield and quality. Compared with manual and chemical weeding, mechanical weeding, with its advantages of high automation, less environmental pollution, and low application cost, is gradually being widely used in paddy field weeding processes.

[0003] However, existing mechanical weeding methods mainly rely on the interaction between the weeding wheel and the soil to bury weeds in water. This may not completely kill the weeds, leading to secondary growth of the weed roots and affecting the weeding effect. Pull-out weeding devices can remove weeds along with their roots from the soil, but the pulled-out weeds may still grow back in the field. How to suppress the secondary growth of weeds while weeding in one operation has become a key problem that urgently needs to be solved. Summary of the Invention

[0004] To address the aforementioned technical problems, the purpose of this invention is to provide a single-power-source rotary pulling and counter-cutting paddy field weeding device; the pulling device clamps and pulls out the weeds, and the cooperating cutting device shreds the weeds to inhibit secondary growth; at the same time, the single-power-source design simplifies the overall transmission system and enables efficient and high-quality weeding operations.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A single-power-source rotary pulling and opposing cutting paddy field weeding device can be attached to the rear end of a rice transplanter 5 for paddy field weeding operations. It is characterized by including a frame 1, a drive and transmission device 2, a rotary disc pulling device 3, and a rotary cutting device 4.

[0007] The drive and transmission device 2 is fixedly connected to the frame 1, generating torque and transmitting power to the rotating disc pulling device 3 and the rotary cutting device 4 installed at the bottom.

[0008] 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 arranged and fixed to the lower end of the main frame 1-1.

[0009] The drive and transmission device 2 includes a drive 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.

[0010] The drive motor 2-1 is fixed 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 system 2-4, which are connected to the transmission cylindrical cam 2-3 by a key and installed on the transmission shaft 2-2; the upper end of the transverse moving frame 2-5 is connected to the wheel groove of the transmission cylindrical cam 2-3.

[0011] 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 keyed to the drive shaft 2-2 and transmits power 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.

[0012] The rotating disc pulling device 3 consists of 6 groups, each group including a lateral moving clamping device 3-1 and a rotating pulling device 3-2.

[0013] The lateral moving clamping device 3-1 includes 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 lateral moving frame 2-5 and moves together with the lateral moving frame 2-5; there are five clamping discs 3-1-2, which are equidistantly fixed to the lower side of the clamping device frame 3-1-1; each set of clamping discs 3-1-2 has a cutting device mounting hole 3-1-3 on the upper side.

[0014] The rotary drawing device 3-2 includes a drawing device shaft 3-2-1 and a rotary drawing disc 3-2-2; the rotary drawing disc 3-2-2 has four pieces, which are equidistantly fixed on the drawing device shaft 3-2-1; one end of the drawing device shaft 3-2-1 is connected to the mounting frame 1-2, and the other end is keyed to the lower pulley 2-4-3, which drives the rotary motion.

[0015] The rotary cutting device 4 consists of 6 sets, each including a cutting and hanging and bearing device 4-1, a bidirectional rotary gear device 4-2, and a counter-cutting device 4-3.

[0016] The cutting and mounting device 4-1 includes a gearbox 4-1-1 and a mounting frame 4-1-2. The mounting frame 4-1-2 is fixed to one end of the gearbox 4-1-1 and one end of the opposing cutting device 4-3, and is connected to the transverse moving frame 2-5 by bolts, so that the cutting and mounting device 4-1 moves laterally with the transverse moving frame 2-5, thereby achieving synchronous transverse movement with the transverse moving clamping device 3-1.

[0017] The bidirectional rotary 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 fixed 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 gearbox 4-1-1 through a bearing seat. When the transverse moving frame 2-5 moves laterally synchronously with the gearbox 4-1-1, the spur gear 4-2-2 moves laterally synchronously and rotates under the action of the fixed rack 4-2-1.

[0018] The bevel gear counter-rotation system 4-2-3 includes a bevel gear carrier 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 carrier 4-2-3-1 is installed inside the gearbox 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 mounted on the bevel gear carrier 4-2-3-1.

[0019] The spur gear 4-2-2 and the top bevel gear 4-2-3-2 are connected by 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 mesh with the two sides of the top bevel gear 4-2-3-2 respectively, and rotate synchronously in opposite directions with the top bevel gear 4-2-3-2.

[0020] The opposing cutting device 4-3 includes an inner shaft 4-3-1, an outer shaft 4-3-2, and a cutting blade 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 opposing cutting device. One end is rotatably mounted in the bracket 4-1-2 through a bearing, and the other end is connected to the far-end rotating bevel gear 4-2-3-3 and the near-end rotating bevel gear 4-2-3-4 respectively through a key and a coupling to achieve synchronous reverse rotation.

[0021] There are a total of 8 sets of cutting blades 4-3-3, each including an inner shaft blade 4-3-3-1 and an outer shaft blade 4-3-3-2; all the inner shaft blades 4-3-3-1 and the outer shaft blades 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 with them.

[0022] The distance L1 between two adjacent clamping discs 3-1-2 is 50-60mm, 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.

[0023] The distance L3 between the bottom end of the clamping disc 3-1-2 and the bottom end of the rotating pulling disc 3-2-2 and the bottom end of the synchronous belt 2-4-2 is 60-70mm.

[0024] The drive cylindrical cam 2-3 has eight strokes: the first rest stroke X1, corresponding to angle α1; the first feed stroke J1, corresponding to angle β1; the second rest stroke X2, corresponding to angle α2; the first return stroke T1, corresponding to angle γ1; the third rest stroke X3, corresponding to angle α3; the second feed stroke J2, corresponding to angle β2; the fourth rest stroke X4, corresponding to angle α4; and the second return stroke T2, corresponding to angle γ2.

[0025] The sum of the turning angles of any four consecutive strokes is 180°. The turning angles α1, α2, α3, and α4 are equal, all between 70° and 75°. The turning angles β1, β2, γ1, and γ2 are equal, all between 15° and 20°.

[0026] During the first feed stroke J1, the first return stroke T1, the second feed stroke J2, and the second return stroke T2, the travel distance of the transmission cylindrical cam 2-3 is L4, where L4 = L1.

[0027] The cutter 4-3-3 has two stationary states: one is the state where the inner shaft cutter 4-3-3-1 and the outer shaft cutter 4-3-3-2 are horizontal to the ground and located on the front and rear sides of the inner shaft 4-3-1 and the outer shaft 4-3-2 respectively, and the other is the state where the inner shaft cutter 4-3-3-1 and the outer shaft cutter 4-3-3-2 overlap and are perpendicular to the ground, and the cutter has already been cut.

[0028] In each set of rotating disc pulling devices 3, two sets of cutting blades 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 sets of cutting blades 4-3-3 are in different static states.

[0029] The width L5 of the inner shaft cutter 4-3-3-1 and the outer shaft cutter 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 centers of the inner shaft 4-3-1 and the outer shaft 4-3-2 is 230-240mm. During the process of the inner shaft cutter 4-3-3-1 and the outer shaft cutter 4-3-3-2 changing from the state to the state of cutting, when the inner shaft cutter 4-3-3-1 and the outer shaft cutter 4-3-3-2 have rotated 45°, they will not collide or interfere with the rotating drawing disc 3-2-2.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] This system achieves high weed removal rates and low secondary regrowth rates through pull-and-shred weeding operations. The clamping disc 3-1-2 moves laterally, clamping weeds upon contact with the rotating pulling disc 3-2-2. As the rotating pulling disc 3-2-2 rotates, the weeds are pulled out and separated from the soil, enabling continuous weed clamping and pulling operations. Simultaneously, by optimizing the stroke of the transmission cylindrical cam 2-3 and the structure of the rotary cutting device 4, the pulled weeds are shredded by the cutting blade 4-3-3 when the rotating pulling disc 3-2-2 is released away from the clamping disc 3-1-2, inhibiting secondary weed growth. Furthermore, since pull-and-shred weeding only requires clamping the upper end of the weeds without the weeding components contacting the soil, it effectively reduces seedling damage. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a single-power-source rotary pulling and opposing cutting paddy field weeding device according to the present invention.

[0033] Figure 2 This is a schematic diagram of the connection between a single-power-source rotary pulling counter-cutting paddy field weeding device and a rice transplanter according to the present invention.

[0034] Figure 3 This is a schematic diagram of the structure of the frame 1 and the drive and transmission device 2 of the present invention;

[0035] Figure 4 This is a schematic diagram of the rotating disc pulling device 3 and the rotary cutting device 4 of the present invention;

[0036] Figure 5 This is a schematic diagram of the lateral moving clamping device 3-1 of the present invention;

[0037] Figure 6 This is a schematic diagram of the rotary pulling device 3-2 of the present invention;

[0038] Figure 7 This is a schematic diagram of the structure of the cutting and hanging and bearing device 4-1 of the present invention;

[0039] Figure 8 This is a schematic diagram of the bidirectional rotary gear device 4-2 of the present invention;

[0040] Figure 9 This is a schematic diagram of the opposing cutting device 4-3 of the present invention;

[0041] Figure 10 This is a schematic diagram of the stroke of the transmission cylindrical cam 2-3 of the present invention;

[0042] Figure 11 This is a schematic diagram showing 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;

[0043] Figure 12 This describes the working process of the clamping disc 3-1-2, the rotating pulling disc 3-2-2, and the cutting blade 4-3-3 within different cam strokes of the present invention.

[0044] The attached figures are labeled as follows:

[0045] 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; Rotary 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; Rotary pulling device 3-2; Pulling device shaft 3-2-1; Rotary... Rotary drawing disc 3-2-2; Rotary cutting device 4; Cutting hook and bearing device 4-1; Gearbox 4-1-1; Hook frame 4-1-2; Bidirectional 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; Far-end rotating bevel gear 4-2-3-3; Near-end rotating bevel gear 4-2-3-4; Opposing cutting device 4-3; Inner shaft 4-3-1; Outer shaft 4-3-2; Cutting blade 4-3-3; Inner shaft blade 4- 3-3-1; External shaft blade 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 retraction stroke T1; First retraction stroke angle γ1; Third rest stroke X3; Third rest stroke angle α3; Second feed stroke J2; Second feed stroke angle β2; Fourth rest stroke X4; Fourth rest stroke angle α4; Second retraction stroke T2; Second retraction stroke angle γ2; Adjacent two leaves clamping The distance L1 between disks 3-1-2; the distance L2 between two adjacent rotating drawing disks 3-2-2; the distance L3 between the bottom of the clamping disk 3-1-2 and the bottom of the rotating drawing disk 3-2-2 and the bottom of the timing belt 2-4-2; the travel distance L4 between the inner drive cylindrical cam 2-3 of the first feed stroke J1, the first return stroke T1, the second feed stroke J2 and the second return stroke T2; the width L5 between the inner shaft cutter 4-3-3-1 and the outer shaft cutter 4-3-3-2; and the distance L6 between the center of the rotating drawing disk 3-2-2 and the centers of the inner shaft 4-3-1 and the outer shaft 4-3-2.

[0046] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0047] like Figure 1-2 As shown, a single-power-source rotary pulling and opposing cutting paddy field weeding device can be attached to the rear end of a rice transplanter 5 for paddy field weeding operations. It is characterized by including a frame 1, a drive and transmission device 2, a rotary disc pulling device 3, and a rotary opposing cutting device 4.

[0048] The drive and transmission device 2 is fixedly connected to the frame 1, generating torque and transmitting power to the rotating disc pulling device 3 and the rotary cutting device 4 installed at the bottom.

[0049] like Figure 3 As shown, 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 arranged and fixed to the lower end of the main frame 1-1.

[0050] The drive and transmission device 2 includes a drive 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;

[0051] The drive motor 2-1 is fixed 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 sets, which are connected to the transmission cylindrical cam 2-3 by a key and installed on the transmission shaft 2-2; the upper end of the transverse moving frame 2-5 is connected to the wheel groove of the transmission cylindrical cam 2-3.

[0052] 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 keyed to the drive shaft 2-2 and transmits power 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.

[0053] like Figures 4-6 As shown, the rotating disc pulling device 3 consists of 6 groups, each group including a lateral moving clamping device 3-1 and a rotating pulling device 3-2.

[0054] like Figure 5 As shown, the lateral moving clamping device 3-1 includes 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 lateral moving frame 2-5 and moves together with the lateral moving frame 2-5; there are five clamping discs 3-1-2, which are equidistantly fixed to the lower side of the clamping device frame 3-1-1; each set of clamping discs 3-1-2 is provided with a cutting device mounting hole 3-1-3 on the upper side.

[0055] like Figure 6As shown, the rotary drawing device 3-2 includes a drawing device shaft 3-2-1 and a rotary drawing disc 3-2-2; the rotary drawing disc 3-2-2 has four pieces, which are equidistantly fixed to the drawing device shaft 3-2-1; one end of the drawing device shaft 3-2-1 is connected to the mounting frame 1-2, and the other end is keyed to the lower pulley 2-4-3, which drives the rotary motion.

[0056] like Figure 4 As shown, the distance L3 between the bottom end of the clamping disc 3-1-2 and the bottom end of the rotating pulling disc 3-2-2 and the bottom end of the synchronous belt 2-4-2 is 60-70mm.

[0057] like Figures 5-6 As shown. The distance L1 between two adjacent clamping discs 3-1-2 is 50-60mm, 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.

[0058] like Figure 4 and Figures 7-9 As shown, the rotary cutting device 4 consists of 6 sets, each including a cutting and mounting device 4-1, a bidirectional rotary gear device 4-2, and a counter-cutting device 4-3.

[0059] like Figure 7 As shown, the cutting and mounting device 4-1 includes a gearbox 4-1-1 and a mounting frame 4-1-2. The mounting frame 4-1-2 is fixed to one end of the gearbox 4-1-1 and one end of the opposing cutting device 4-3, and is connected to the transverse moving frame 2-5 by bolts, so that the cutting and mounting device 4-1 moves laterally with the transverse moving frame 2-5, realizing synchronous transverse movement with the transverse moving clamping device 3-1.

[0060] like Figure 8 As shown, the bidirectional rotary 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 fixed 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 gearbox 4-1-1 through a bearing seat. When the transverse moving frame 2-5 moves laterally synchronously with the gearbox 4-1-1, the spur gear 4-2-2 moves laterally synchronously and rotates under the action of the fixed rack 4-2-1.

[0061] like Figure 9As shown, the bevel gear counter-rotation system 4-2-3 includes a bevel gear carrier 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 carrier 4-2-3-1 is installed inside the gearbox 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 mounted on the bevel gear carrier 4-2-3-1;

[0062] The spur gear 4-2-2 and the top bevel gear 4-2-3-2 are connected by 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 mesh with the two sides of the top bevel gear 4-2-3-2 respectively, and rotate synchronously in opposite directions with the top bevel gear 4-2-3-2.

[0063] like Figure 9 As shown, the opposing cutting device 4-3 includes an inner shaft 4-3-1, an outer shaft 4-3-2, and a cutting blade 4-3-3; the inner shaft 4-3-1 and the outer shaft 4-3-2 pass through the cutting device mounting hole 3-1-3, one end of which is rotatably mounted in the bracket 4-1-2 via a bearing, and the other end is connected to the distal rotating bevel gear 4-2-3-3 and the proximal rotating bevel gear 4-2-3-4 respectively via a key and a coupling to achieve synchronous reverse rotation.

[0064] There are a total of 8 sets of cutting blades 4-3-3, each including an inner shaft blade 4-3-3-1 and an outer shaft blade 4-3-3-2; all the inner shaft blades 4-3-3-1 and the outer shaft blades 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 with them.

[0065] like Figure 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 return 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; and the second return stroke T2, corresponding to the rotation angle γ2.

[0066] The sum of the turning angles of any four consecutive strokes is 180°. The turning angles α1, α2, α3, and α4 are equal, all between 70° and 75°. The turning angles β1, β2, γ1, and γ2 are equal, all between 15° and 20°.

[0067] During the first feed stroke J1, the first return stroke T1, the second feed stroke J2, and the second return stroke T2, the travel distance of the transmission cylindrical cam 2-3 is L4, where L4 = L1;

[0068] The cutter 4-3-3 has two stationary states: one is the state where the inner shaft cutter 4-3-3-1 and the outer shaft cutter 4-3-3-2 are horizontal to the ground and located on the front and rear sides of the inner shaft 4-3-1 and the outer shaft 4-3-2 respectively, and the other is the state where the inner shaft cutter 4-3-3-1 and the outer shaft cutter 4-3-3-2 overlap and are perpendicular to the ground, and the cutter has already been cut.

[0069] In each set of rotating disc pulling devices 3, two sets of cutting blades 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 sets of cutting blades 4-3-3 are in different static states.

[0070] like Figure 11 As shown, the width L5 of the inner shaft cutter 4-3-3-1 and the outer shaft cutter 4-3-3-2 is 35-40mm, the diameter D of the rotating drawing disk 3-2-2 is 280-290mm, and the distance L6 between the center of the rotating drawing disk 3-2-2 and the centers of the inner shaft 4-3-1 and the outer shaft 4-3-2 is 230-240mm. During the process of the inner shaft cutter 4-3-3-1 and the outer shaft cutter 4-3-3-2 changing from the state to the state of being cut, when the inner shaft cutter 4-3-3-1 and the outer shaft cutter 4-3-3-2 have rotated 45°, they will not collide or interfere with the rotating drawing disk 3-2-2.

[0071] The specific implementation principle and process are as follows:

[0072] The initial state is when the left end face of the clamping disc 3-1-2 is in contact with the rotating pulling disc 3-2-2 on its left side, that is, the single-power source rotating pulling opposing cutting paddy field weeding device of the present invention is in the following state. Figure 12 In the initial state shown, with the forward direction of the rice transplanter 5 as the front, the 1st, 3rd, 5th and 7th pairs of cutters 4-3-3 from left to right are in the cut state, the 2nd, 4th, 6th and 8th pairs of cutters 4-3-3 are in the waiting state, and the transmission cylindrical cam 2-3 is in the first rest stroke X1.

[0073] 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.

[0074] As the rice transplanter 5 moves forward, the weeds enter the clamping space formed between the right end face of the clamping disc 3-1-2 and its right side rotating pulling disc 3-2-2;

[0075] The drive motor 2-1 drives the transmission shaft 2-2 to rotate. The power is transmitted through the transmission shaft 2-2 and the synchronous belt system 2-4 to the drawing device shaft 3-2-1, causing the rotating drawing disc 3-2-2 to rotate.

[0076] As the transmission cylindrical cam 2-3 rotates, it enters the first feed stroke J1.

[0077] The transmission cylindrical cam 2-3 drives the transverse moving frame 2-5 to move laterally to the right, causing the left end face of the gripping disc 3-1-2 to separate from the left rotating pulling disc 3-2-2 that is in contact with it, and move to the right rotating pulling disc 3-2-2.

[0078] During this process, the right end face of the clamping disc 3-1-2 gradually approaches the rotating pulling disc 3-2-2 on its right side and fits together at the end of the feed stroke J1, clamping the weeds in the clamping space and completing the weed clamping operation.

[0079] As the transverse moving frame 2-5 moves laterally to the right, the spur gear 4-2-2 moves laterally to the right in sync, and rotates under the action of the fixed rack 4-2-1, driving the bevel gear counter-rotation system 4-2-3 to rotate;

[0080] The 1, 3, 5, and 7 pairs of cutters 4-3-3 rotate away from the already cut state in the opposite direction on the same axis, and enter the waiting-to-cut state at the end of the feed stroke J1 to prevent interference with the rotating pull-out disc 3-2-2;

[0081] Groups 2, 4, 6, and 8 of the cutting blade 4-3-3 move closer to each other in opposite directions from the state to be cut, and enter the cut state at the end of the feed stroke J1.

[0082] As the transmission cylindrical cam 2-3 rotates, it enters the second rest stroke X2.

[0083] The right end face of the clamping disc 3-1-2 is in contact with the rotating pulling disc 3-2-2 on its right side. As the rotating pulling disc 3-2-2 rotates clockwise, the clamped weeds move upward with the rotating pulling disc 3-2-2, completing the weed pulling operation.

[0084] During the second rest stroke X2, the left end face of the gripping disk 3-1-2 and the rotating pull disk 3-2-2 on its left side form a gripping space.

[0085] As the transmission cylindrical cam 2-3 rotates, the first retraction stroke T1 begins;

[0086] The transmission cylindrical cam 2-3 drives the transverse moving frame 2-5 to move laterally to the left, causing the right end face of the gripping disc 3-1-2 to separate from the rotating pulling disc 3-2-2 on its right side, and move to the rotating pulling disc 3-2-2 on the right side.

[0087] At this time, the weeds being gripped and pulled are located between the gripping disc 3-1-2 and the upper part of the rotating pulling disc 3-2-2; the first, third, fifth, and seventh pairs of cutters 4-3-3 rotate coaxially and in opposite directions from the state to be cut, cutting the weeds between the gripping disc 3-1-2 and the upper part of the rotating pulling disc 3-2-2, thus achieving the cutting and crushing of the weeds;

[0088] During the first retraction stroke T1, the left end face of the clamping disc 3-1-2 adheres to and clamps the weeds with its left side rotating pulling disc 3-2-2; at the end of the first retraction stroke T1, the clamping space is formed between the right end face of the clamping disc 3-1-2 and its right side rotating pulling disc 3-2-2.

[0089] The transmission cylindrical cam 2-3 rotates, entering the third rest stroke X3.

[0090] At this time, the machine is in the same state as in the first rest stroke X1. The weeds that are attached and clamped to the left end face of the gripping disc 3-1-2 and the left rotating pulling disc 3-2-2 are pulled out.

[0091] The transmission cylindrical cam 2-3 rotates, entering the second feed stroke J2.

[0092] At this time, the machine status is the same as in the first feed stroke J1. The weeds pulled by the left end face of the clamping disc 3-1-2 and the left rotating pulling disc 3-2-2 are cut by the first, third, fifth and seventh pairs of cutters 4-3-3.

[0093] The transmission cylindrical cam 2-3 rotates, entering the fourth rest stroke X4.

[0094] At this point, the machine's status is the same as in the second rest stroke X2.

[0095] The transmission cylindrical cam 2-3 rotates, entering the second retraction stroke T2.

[0096] At this point, the machine's status is the same as in the first reversal stroke T1.

[0097] As the transmission cylindrical cam 2-3 rotates, the gripping disc 3-1-2 and its two sides rotating pulling discs 3-2-2 alternately grip and pull weeds. The weed cutting blades 4-3-3 in groups 1, 3, 5, and 7 alternately cut the weeds.

[0098] The above embodiments are only used to illustrate the present invention. The structure and connection method of each component can be varied. Any equivalent transformations and improvements made on the basis of 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 and opposing cutting paddy field weeding device, which can be attached to the rear end of a rice transplanter (5) for paddy field weeding operations, characterized in that, It includes a frame (1), a drive and transmission device (2), a rotating disc pulling device (3), and a rotary cutting device (4). The drive and transmission device (2) is fixed to the frame (1) and generates torque to transmit power to the rotating disc pulling device (3) and the rotary cutting device (4) installed at the bottom. 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 fixedly connected to the lower end of the main frame (1-1) at equal intervals. The drive and transmission device (2) includes a drive 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 drive motor (2-1) is fixed 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 system (2-4), which are connected to the transmission cylindrical cam (2-3) by a key and installed on the transmission shaft (2-2); 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 keyed to the drive shaft (2-2) and transmits power 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) taut. The rotating disc pulling device (3) consists of 6 groups, each group including a lateral moving clamping device (3-1) and a rotating pulling device (3-2). The lateral moving clamping device (3-1) includes 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 lateral moving frame (2-5) and moves together with the lateral moving frame (2-5); there are five clamping discs (3-1-2), which are equidistantly fixed to the lower side of the clamping device frame (3-1-1); each set of clamping discs (3-1-2) is provided with a cutting device mounting hole (3-1-3) on the upper side. The rotary drawing device (3-2) includes a drawing device shaft (3-2-1) and a rotary drawing disc (3-2-2); the rotary drawing disc (3-2-2) has four discs, which are equidistantly fixed to the drawing device shaft (3-2-1); one end of the drawing device shaft (3-2-1) is connected to the mounting frame (1-2), and the other end is keyed to the lower pulley (2-4-3), which drives the rotary motion. The rotary cutting device (4) consists of 6 sets, each including a cutting and hanging and bearing device (4-1), a bidirectional rotary gear device (4-2), and a counter-cutting device (4-3). The cutting and mounting device (4-1) includes a gearbox (4-1-1) and a mounting frame (4-1-2). The mounting frame (4-1-2) is fixed to one end of the gearbox (4-1-1) and one end of the opposing cutting device (4-3), and is connected to the transverse moving frame (2-5) by bolts, so that the cutting and mounting device (4-1) moves laterally with the transverse moving frame (2-5), and realizes synchronous transverse movement with the transverse moving clamping device (3-1). The bidirectional rotary 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 fixed to the mounting frame (1-2) by screws and meshes with the spur gear (4-2-2). The spur gear (4-2-2) is installed in the gearbox (4-1-1) through a bearing seat. When the transverse moving frame (2-5) moves laterally synchronously with the gearbox (4-1-1), the spur gear (4-2-2) moves laterally synchronously and rotates under the action of the fixed rack (4-2-1). The bevel gear counter-rotation system (4-2-3) includes a bevel gear carrier (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 carrier (4-2-3-1) is installed inside the gearbox (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 mounted on the bevel gear carrier (4-2-3-1); The spur gear (4-2-2) and the top bevel gear (4-2-3-2) are connected by 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) mesh with the two sides of the top bevel gear (4-2-3-2) respectively, and rotate synchronously in opposite directions with the top bevel gear (4-2-3-2). The opposing cutting device (4-3) includes an inner shaft (4-3-1), an outer shaft (4-3-2), and a cutting blade (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 opposing cutting device. One end is rotatably mounted in the bracket (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 rotating bevel gear (4-2-3-4) respectively through a key and a coupling to achieve synchronous reverse rotation. There are a total of 8 sets of cutting blades (4-3-3), each including an inner shaft blade (4-3-3-1) and an outer shaft blade (4-3-3-2); all the inner shaft blades (4-3-3-1) and outer shaft blades (4-3-3-2) are connected by screws and arranged in parallel on the inner shaft (4-3-1) and outer shaft (4-3-2) and rotate synchronously with them.

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

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

4. The single-power-source rotary pulling counter-cutting paddy field weeding device according to claim 3, characterized in that, The cutting blade (4-3-3) has two static states: one is the state where the inner shaft blade (4-3-3-1) and the outer shaft blade (4-3-3-2) are horizontal to the ground and located on the front and rear sides of the inner shaft (4-3-1) and the outer shaft (4-3-2) respectively, which is to be cut; the other is the state where the inner shaft blade (4-3-3-1) and the outer shaft blade (4-3-3-2) overlap and are perpendicular to the ground, which is the state after cutting. In each set of rotating disc pulling devices (3), two sets of cutting blades (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 sets of cutting blades (4-3-3) are in different static states.

5. A single-power-source rotary pulling and opposing cutting paddy field weeding device according to claim 4, characterized in that, The width L5 of the inner shaft cutter (4-3-3-1) and the outer shaft cutter (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 centers of the inner shaft (4-3-1) and the outer shaft (4-3-2) is 230-240mm. When the inner shaft cutter (4-3-3-1) and the outer shaft cutter (4-3-3-2) of this size are transferred from the state to the state of being cut, they will not collide or interfere with the rotating drawing disc (3-2-2) when they rotate 45°.

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