A stubble disc and stubble disc opening mechanism for agricultural machines

Abstract

The application discloses stubble pressing disc and stubble pressing furrow opening mechanism for agricultural machinery, wherein the stubble pressing disc has a disc body capable of rotating, and edges of the disc body are formed with a plurality of tooth portions arranged in a circumferential array; the tooth portion has a stubble pressing edge in an involute shape. The stubble pressing furrow opening mechanism comprises a rack, a stubble pressing assembly, a furrow opener and a driving mechanism; the stubble pressing assembly comprises a rotating shaft and a plurality of stubble pressing discs arranged in a linear array in the extending direction of the rotating shaft; the rotating shaft is driven to rotate by the driving mechanism; and the furrow opener has an accommodating space for accommodating the driving mechanism. In the application, the shape of the stubble pressing disc conforms to the motion characteristics of the stubble pressing disc relative to the pressed stubble, the pressing process is smoother, the involute is tangent to the circumscribed circle of the disc body, the stubble is easier to be separated from the top of the stubble pressing edge after being pressed to the deepest position, and a better stubble pressing effect can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural machinery technology, in particular to a stubble disc for agricultural machinery and a stubble disc and furrow opening mechanism. BACKGROUND

[0002] In the process of agricultural seeding and fertilization, the stubble on the ground needs to be processed before the seeding groove and the fertilization groove are opened on the ground. The mainstream method is to press the stubble into the soil by a stubble disc to avoid the stubble affecting the subsequent operation of opening the seeding groove and the fertilization groove. Figure 3 As shown in the figure, the current stubble disc has a large pressure angle on the stubble, and the stubble disc has a poor stubble effect. The stubble is easily accumulated in front of the stubble disc and pushed away by the stubble disc, affecting the operation. In the prior art, patent CN204859925U discloses a notch disc stubble cleaner. In this patent, notches are arranged on the periphery of the stubble cleaner. In this scheme, when the stubble cleaner acts on the stubble, the pressure angle of the edge of the stubble cleaner acting on the stubble fluctuates greatly, and the stubble depth is unstable, varying in depth. The actual stubble effect is poor. In addition, the power mechanism driving the stubble cleaner in the prior art has a large volume and requires a large installation space.

[0003] In addition to the stubble operation, the field also needs to be furrowed. In the prior art, the stubble device and the furrow opener are generally arranged in front and back, and a seeding device also needs to be installed behind, which will make the machine length long and the volume large. SUMMARY

[0004] The present application provides a stubble disc for agricultural machinery and a stubble disc and furrow opening mechanism with good stubble effect.

[0005] Technical scheme: To achieve the above-mentioned purpose, a stubble disc for agricultural machinery has a disc body capable of rotating, and the edge of the disc body forms a plurality of tooth portions arranged in a circumferential array.

[0006] The tooth portion has a stubble edge, and the stubble edge is in the shape of an involute.

[0007] Further, the tooth portion also has a transition edge. The transition edge connects the stubble edges of two adjacent tooth portions. The transition edge connects the point farthest from the center O (referred to as the top) of one stubble edge and the point closest to the center O (referred to as the root) of the other stubble edge. Preferably, the transition edge is a straight edge extending along the radial direction of the disc body.

[0008] Further, the stubble edge has a plurality of tooth portions arranged along the involute. The tooth portion can reduce the unnecessary sliding of the stubble relative to the stubble edge, and in particular, prevent the pressed stubble from slipping off the top end of the stubble edge and being pressed to the deepest position. The tooth portion can better press the stubble.

[0009] Furthermore, the disk body has multiple perforated holes arranged in a circular array.

[0010] Furthermore, the diameter of the disc body is 200-280mm, and its stubble depth is 50-100mm.

[0011] When using the aforementioned stubble pressing disc for stubble pressing operations, the stubble pressing disc rotates actively. In the direction of rotation, the root of the stubble edge is in front and the top is behind. As the stubble edge contacts the stubble and presses it into the soil, the stubble pressing disc rotates. Since the stubble's position relative to the ground remains relatively stationary, the stubble edge actively moves relative to the stubble to gradually press it into the soil.

[0012] A stubble-forming and trenching mechanism includes a frame, a stubble-forming assembly, a trencher, and a drive mechanism; the stubble-forming assembly includes a rotating shaft and a plurality of stubble-forming units arranged in a linear array along the extension direction of the rotating shaft; the rotating shaft is driven by the drive mechanism.

[0013] The stubble pressing unit is the aforementioned stubble pressing disc; the trencher has a receiving space for accommodating the drive mechanism, at least a portion of the drive mechanism is placed within the receiving space, and in a top view, the main body of the drive mechanism is enveloped by the outer contour of the trencher.

[0014] Furthermore, the drive mechanism includes a hydraulic motor and a reduction gearbox; the output shaft of the hydraulic motor is axial in the front-to-back direction, and the output shaft is connected to the rotating shaft through the reduction gearbox.

[0015] Furthermore, the number of the interlocking components is two sets, and the two sets of interlocking components are symmetrically installed relative to the commutator, that is, symmetrically installed relative to the trencher.

[0016] Furthermore, the rotating shaft is a square shaft, the pressing disc has a square hole, the pressing disc is sleeved on the rotating shaft, and there are spacers between adjacent pressing discs. By setting the square shaft, the rotation of the pressing disc relative to the rotating shaft can be effectively prevented.

[0017] Furthermore, the trencher has a long, boat-shaped structure with grooves on its two side walls.

[0018] In addition, the frame is installed in a floating manner. The frame is rotated relative to the upper base via a connecting shaft, which is located directly above the trencher. The frame is installed symmetrically relative to the connecting shaft, that is, the two sets of stubble pressing components are installed symmetrically relative to the connecting shaft. In this way, the frame and the two sets of stubble pressing components can adapt to the terrain and make adaptive movements, so that the left and right tilt angle of the frame is adapted to the terrain, thereby improving the uniformity of stubble pressing.

[0019] Beneficial effects: The stubble pressing disc and stubble pressing and ditching mechanism for agricultural machinery of the present invention have the following advantages:

[0020] Beneficial effects:

[0021] (1) Because the edge of the stubble is involute, it conforms to the motion characteristics of the stubble disc relative to the stubble being pressed in, resulting in a smoother pressing process. Compared to a disc-shaped stubble disc, the involute edge of the stubble has a smaller pressure angle on the stubble, and the pressure direction exerted on the stubble by the contact between the involute edge and the stubble is the same at all positions, which also achieves a better pressing effect. The pressure angle of the involute is designed based on the friction angle between the stubble and the stubble disc material. This ensures that the stubble and the pressure disc do not slide relative to each other during the pressing process, and also ensures that during the lifting stage after reaching the stubble depth, the stubble does not move upward with the stubble disc after the phase and direction of movement change.

[0022] (2) By creating an accommodating space in the trencher to enclose the drive mechanism, the additional space required by the drive mechanism can be effectively reduced, the structural compactness can be improved, and the drive mechanism can be protected from impact damage.

[0023] (3) The input shaft and output shaft of the reduction gearbox are perpendicular to each other, so that the overall extension direction of the drive mechanism extends along the length direction of the trencher. The trencher can envelop the drive mechanism and improve the structural compactness.

[0024] (4) The structure of the extended trench opener can increase the shaping time of the trench. A groove is set in the middle of the side wall. During the trenching process, the collapsed part of the trench opened by the trench opener enters the groove. As the trench opener moves, the trench wall collapses when it passes through the groove. The rear half of the trench opener can be used to repair the trench wall, which can effectively improve the quality of trenching and reduce the probability of trench wall collapse. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the stubble pressing disc for agricultural machinery in the first embodiment;

[0026] Figure 2 This is a structural diagram of the stubble pressing disc for agricultural machinery in the second embodiment;

[0027] Figure 3 The pressure angle of a traditional pressing disc;

[0028] Figure 4 A top view of the stubble-opening ditching mechanism;

[0029] Figure 5 A three-dimensional structural diagram of the stubble-cutting mechanism;

[0030] Figure 6 for Figure 4 BB section view in the middle.

[0031] In the diagram: 1-Scraping disc; 1a-Disc body; 1b-Teeth; 1c-Scraping edge; 1d-Transition edge; 1e-Hollow hole; 1f-Square hole; A-Scraping assembly; 2-Ditch opener; 21-Groove; 3-Drive mechanism; 31-Hydraulic motor; 32-Reduction gearbox; 4-Rotating shaft; 5-Frame; 6-Spacer; 7-Connecting shaft; 8-Base; 9-Soil removal plate; 91-Comb teeth. Detailed Implementation

[0032] The invention will now be further described with reference to the accompanying drawings.

[0033] like Figure 1 The stubble pressing disc 1 shown has a rotatable disc body 1a, the edge of which is formed with a plurality of circumferentially arranged teeth 1b; the teeth 1b have a stubble pressing edge 1c, which is involute in shape.

[0034] The tooth 1b also has a transition edge 1d; the transition edge 1d connects the stubble edges 1c of two adjacent teeth 1b, and the transition edge 1d connects the point farthest from the center O of one stubble edge 1c (called the top) to the point closest to the center O of the other stubble edge 1c (called the root). Preferably, the transition edge 1d is a straight edge extending radially along the disk body 1a.

[0035] In a preferred embodiment, such as Figure 2 As shown, the stubble edge 1c has multiple teeth arranged along an involute. These teeth reduce unnecessary slippage of the residue relative to the stubble edge 1c, and in particular, prevent the pressed residue from slipping off the top of the stubble edge 1c and failing to be pressed to the deepest position. The teeth provide a better stubble pressing effect.

[0036] The disk body 1a has multiple perforated holes 1e arranged in a circular array.

[0037] In this embodiment, the diameter of the disc body 1a is 200-280mm, and its stubble depth is 50-100mm.

[0038] When using the aforementioned stubble pressing disc 1 for stubble pressing operations, the disc 1 rotates actively. In the direction of rotation, the root of the stubble edge 1c is in front, and the top is behind. As the stubble edge 1c contacts the stubble and presses it into the soil, the stubble edge 1c actively moves relative to the stubble, gradually pressing it into the soil, since the stubble's position relative to the ground remains relatively stationary. Because the stubble edge 1c has an involute shape, it conforms to the movement characteristics of the stubble pressing disc 1 relative to the pressed stubble, resulting in a smoother pressing process. The involute shape of the stubble edge 1c, compared to a disc-shaped stubble pressing disc (such as...), provides a smoother pressing process. Figure 3As shown in the figure, the pressure angle of the stubble (the angle α between velocity v and pressure F in the figure) is smaller, which can also achieve a better pressing effect. The pressure angle of the involute is designed based on the friction angle between the stubble and the pressing plate material. It can ensure that the stubble and the pressure plate do not slide relative to each other during the pressing process, and also ensure that the stubble does not move upward with the pressing plate after the phase and direction of movement change during the lifting stage after the pressing depth is reached.

[0039] like Figures 4-5 The stubble-forming and trenching mechanism shown includes a frame 5, a stubble-forming assembly A, a trencher 2, and a drive mechanism 3. The stubble-forming assembly A includes a rotating shaft 4 and multiple stubble-forming units arranged in a linear array along the extension direction of the rotating shaft 4. The rotating shaft 4 is driven by the drive mechanism 3. The stubble-forming unit is the aforementioned stubble-forming disc 1. The trencher 2 has a receiving space for accommodating the drive mechanism 3, and at least a portion of the drive mechanism 3 is placed within the receiving space. In a top view, the main body of the drive mechanism 3 is enveloped by the outer contour of the trencher 2. Creating a receiving space in the trencher 2 to enclose the drive mechanism 3 effectively reduces the additional space required for the drive mechanism 3, improves structural compactness, and provides protection for the drive mechanism 3, preventing it from being damaged by impact.

[0040] The drive mechanism 3 includes a hydraulic motor 31 and a reduction gearbox 32. The output shaft of the hydraulic motor 31 is axially in the front-to-back direction, and the output shaft is connected to the rotating shaft 4 through the reduction gearbox 32. The input shaft and output shaft of the reduction gearbox 32 are perpendicular to each other, so that the overall extension direction of the drive mechanism 3 extends along the length direction of the trencher 2. The lower sides of the hydraulic motor 31 and the reduction gearbox 32 are recessed into the accommodating space of the trencher 2.

[0041] The number of the scrambling components A is two sets, and the two sets of scrambling components A are installed symmetrically with respect to the commutator 32, that is, symmetrically with respect to the trencher 2.

[0042] like Figure 6 As shown, the rotating shaft 4 is a square shaft, and the pressing disc 1 has a square hole 1f. The pressing disc 1 is sleeved on the rotating shaft 4, and there is a spacer 6 between adjacent pressing discs 1. By setting the square shaft, the rotation of the pressing disc 1 relative to the rotating shaft 4 can be effectively prevented.

[0043] Preferably, the trencher 2 is a long, boat-shaped structure with grooves 21 on both side walls, and transition slopes at both ends of the grooves 21. The extended trencher 2 structure increases the time for shaping the trench. The grooves 21 in the middle of the side walls allow the collapsed portion of the trench created by the trencher 2 during trenching to enter the grooves 21. As the trencher 2 moves, the trench is reshaped, effectively improving the quality of trenching.

[0044] In addition, the frame 5 is installed in a floating manner. The frame 5 is rotated relative to the upper base 8 via the connecting shaft 7. The connecting shaft 7 is located directly above the trencher 2. The frame 5 is symmetrically installed relative to the connecting shaft 7, that is, the two sets of stubble pressing components A are symmetrically installed relative to the connecting shaft 7. In this way, the frame 5 and the two sets of stubble pressing components A can adapt to the terrain and make adaptive movements, so that the left and right tilt angles of the frame 5 are adapted to the terrain, thereby improving the uniformity of stubble pressing.

[0045] In addition, it also includes a soil removal plate 9, which is comb-shaped and has multiple comb teeth 91 arranged in a linear array; each comb tooth 91 is embedded between two adjacent stubble pressing discs 1, so as to prevent soil from getting stuck between the stubble pressing discs 1. Combined with the hollow hole structure on the disc body 1a, it can better remove soil.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A stubble-forming trenching mechanism, comprising a frame (5), a stubble-forming assembly (A), a trencher (2), and a drive mechanism (3); the stubble-forming assembly (A) comprises a rotating shaft (4) and a plurality of stubble-forming units arranged in a linear array along the extension direction of the rotating shaft (4); the rotating shaft (4) is driven to operate by the drive mechanism (3); characterized in that: The pressing unit is a pressing disc (1), which has a rotatable disc body (1a). The edge of the disc body (1a) has a plurality of circumferentially arranged teeth (1b). The teeth (1b) have pressing edges (1c), which are involute in shape. The teeth (1b) also have transition edges (1d). The transition edges (1d) connect the pressing edges (1c) of two adjacent teeth (1b). The disc body (1a) has a plurality of circumferentially arranged perforated holes (1e). The trencher (2) has a accommodating space for accommodating the drive mechanism (3); the drive mechanism (3) includes a hydraulic motor (31) and a reduction gearbox (32); the output shaft of the hydraulic motor (31) is axial in the front-rear direction, and the output shaft is connected to the rotating shaft (4) through the reduction gearbox (32); the trencher (2) is a long, boat-shaped structure with grooves (21) on its two side walls. It also includes a soil removal plate (9), which is comb-shaped and has multiple comb teeth (91) arranged in a straight array; each comb tooth (91) is embedded between two adjacent stubble pressing discs (1).

2. The stubble-opening trenching mechanism according to claim 1, characterized in that, The number of the pressing assembly (A) is two sets, and the two sets of pressing assembly (A) are symmetrically installed relative to the reduction gearbox (32).

3. The stubble-opening trenching mechanism according to claim 1, characterized in that, The rotating shaft (4) is a square shaft, the pressing disc (1) has a square hole (1f), the pressing disc (1) is sleeved on the rotating shaft (4), and there is a spacer (6) between adjacent pressing discs (1).

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