Profiling type crop stalk cutting device

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to a profiling type crop stalk cutting device which comprises a rack, a horizontally-arranged transmission shaft is rotatably arranged in the rack, and a plurality of vertically-arranged rotating shafts are rotatably arranged on the rack; a mounting groove is formed in the bottom end of the rotating shaft, the upper portion of a connecting shaft is arranged in the mounting groove and can move in the length direction of the rotating shaft, the upper portion of the connecting shaft is connected with the inner wall of the mounting groove through a vertically-arranged spline, a guide disc is mounted at the bottom end of the connecting shaft, and a cutting disc is fixedly connected to the connecting shaft in a sleeving mode. The straw cutting machine has the advantages that when the straw cutting machine works, under the action of gravity, the connecting shaft moves downwards to the guiding disc to be placed on the bottom face of a farmland, the height of the cutting disc is reduced along with downward movement of the connecting shaft, and therefore the cutting disc can cut off straw along the roots of the straw, complete straw can be kept, and the straw cutting machine is convenient to use. And the cut straw can be conveniently bundled, and waste of the straw is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a crop stem cutting device. Background Art

[0002] After corn is harvested, a large amount of straw is produced. In order to protect the environment, the country prohibits the burning of straw, so the straw needs to be crushed and returned to the field. However, after the straw is crushed, it ferments in the field, causing changes in soil composition and the occurrence of pests and diseases, affecting the growth of crops in the next season; at the same time, crushing and returning the straw to the field causes straw waste.

[0003] my country is a country with a large population and a developed animal husbandry industry, which has a high demand for feed. The cost of using feed to feed cattle and sheep is high. If the straw is recycled and fermented, it can be used as feed to feed cattle and sheep, reducing the cost of breeding.

[0004] For straw recycling, the domestic market generally adopts machines that can collect both stalks and ears, but these machines are expensive and require high maintenance costs. Individuals and other small-scale farmers generally use balers to recycle stalks.

[0005] When agricultural machinery harvests corn, the stalks crushed by the field return machine contain a lot of soil and other debris. At the same time, the crushed stalks cannot be picked up completely by the baler, resulting in straw waste. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a crop stem cutting device which can adjust the height of the disc knife according to the actual topography of the farmland to ensure that the straw can be cut from the root.

[0007] The utility model solves the above-mentioned technical problem with the following technical solutions: a crop stem cutting device, comprising a frame, a horizontally arranged transmission shaft rotatably arranged in the frame, a plurality of vertically arranged rotating shafts rotatably arranged on the frame, the transmission shaft being transmission-connected to the rotating shaft for driving the rotating shaft to rotate axially in the vertical direction; a mounting groove is arranged at the bottom end of the rotating shaft, the upper part of the connecting shaft is arranged in the mounting groove and can move along the length direction of the rotating shaft, the upper part of the connecting shaft is connected to the inner wall of the mounting groove through a vertically arranged spline, a guide plate is installed at the bottom end of the connecting shaft, a disc knife is fixedly sleeved on the connecting shaft, and the disc knife is arranged above the guide plate.

[0008] The beneficial effects of the utility model are as follows: the frame is installed on the agricultural machinery, and when working, under the action of gravity, the connecting shaft moves downward to the guide plate and is placed on the bottom surface of the farmland, and the disc knife lowers its height as the connecting shaft moves downward, so that the disc knife can cut the straw along the root of the straw to ensure that the whole straw is retained, which is convenient for baling the cut straw and avoiding waste of straw.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, a compression spring is sleeved on the upper portion of the connecting shaft, the top end of the compression spring is connected to the bottom end of the rotating shaft, and the bottom end of the compression spring is connected to the connecting shaft for applying a downward force to the connecting shaft.

[0011] The beneficial effect of adopting the above further solution is that the compression spring can exert a downward force on the connecting shaft, thereby preventing the connecting shaft from being stuck between the connecting shaft and the installation groove and preventing the connecting shaft from being unable to move downward normally.

[0012] Furthermore, a first bevel gear is fixedly sleeved on the transmission shaft, a second bevel gear is fixedly sleeved on the top end of the rotating shaft, and the first bevel gear is meshed with the second bevel gear.

[0013] The beneficial effect of adopting the above further solution is that the transmission shaft and the rotating shaft are transmitted through the bevel gears, so that one transmission shaft can simultaneously drive multiple rotating shafts arranged perpendicular to the transmission shaft.

[0014] Furthermore, a plurality of protective shells are fixedly provided at the bottom of the frame, and the plurality of rotating shafts are provided on the inner side of the protective shells in a one-to-one correspondence.

[0015] The beneficial effect of adopting the above further solution is that the provision of the protective shell can protect the rotating shaft, thereby preventing the corn stems and leaves from being entangled with the rotating shaft due to the rotation of the rotating shaft during operation.

[0016] Furthermore, a support plate is fixedly provided on the inner wall of the protective shell, a through hole is provided in the middle of the support plate for the connecting shaft to pass through, and a limiting ring with an outer diameter larger than an inner diameter of the through hole is fixedly provided on the connecting shaft.

[0017] The beneficial effect of adopting the above further solution is: the downward movement of the connecting shaft is limited by the support plate and the limiting ring, so as to prevent the connecting shaft from being separated from the installation groove.

[0018] Furthermore, a knife seat is provided on the fixed sleeve on the connecting shaft, and the disc knife sleeve is arranged on the connecting shaft and is detachably fixedly connected to the knife seat by bolts.

[0019] The beneficial effect of adopting the above further solution is that the arrangement of the knife holder can facilitate the replacement of the disc knife as needed.

[0020] Furthermore, an upper limit block is fixedly provided on the knife seat, and a limiting portion for limiting the movement range of the upper limit block is provided on the side wall of the protective shell.

[0021] The beneficial effect of adopting the above further solution is that the provision of the upper limit block and the limit portion can limit the upward movement of the connecting shaft, thereby preventing the connecting shaft from colliding with the rotating shaft and causing damage to the rotating shaft and the connecting shaft.

[0022] Furthermore, a guide disc mounting seat is rotatably sleeved on the bottom end of the connecting shaft, and the guide disc is detachably fixedly connected to the guide disc mounting seat via bolts.

[0023] The beneficial effect of adopting the above further solution is that the provision of the guide disc mounting seat facilitates the installation, disassembly and replacement of the guide disc.

[0024] Furthermore, the bottom end of the connecting shaft is fixedly sleeved with a thrust ball bearing and a rotating bearing at intervals from bottom to top, and the inner side of the guide plate mounting seat is fixedly clamped between the seat ring of the thrust ball bearing and the outer ring of the rotating shaft.

[0025] The beneficial effect of adopting the above further scheme is that the guide plate mounting seat is installed on the connecting shaft through a rotating bearing and a thrust ball bearing, so that the guide plate mounting seat can rotate relative to the connecting shaft, thereby avoiding damage caused by the guide plate rubbing against the farmland ground as the connecting shaft rotates.

[0026] Furthermore, the guide plate includes a connecting portion located in the middle, and a guide ring portion arranged outside the connecting portion, the connecting portion is connected to the bottom of the connecting shaft, the outer peripheral wall of the connecting portion is integrally fixedly connected to the inner peripheral wall of the guide ring portion, and the guide ring portion gradually extends upward from the inside to the outside.

[0027] The beneficial effect of adopting the above further solution is that the guide ring adopts a structure that gradually extends upward from the inside to the outside, and the bottom of the guide plate gradually contacts the farmland soil or the remaining roots of the straw and gradually rises during the forward movement of the agricultural machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0029] Figure 2 It is the front view of the utility model;

[0030] Figure 3 This is a schematic diagram of the connection between the rotating shaft and the connecting shaft of the utility model;

[0031] Figure 4 The figure is a schematic diagram of the utility model when it is working, the left side of the figure is a schematic diagram of the disc knife in the descending state, and the right side is a schematic diagram of the disc knife in the lifting state;

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 1. Frame; 2. Transmission shaft; 3. Rotating shaft; 4. Connecting shaft; 5. Spline; 6. Guide plate; 61. Connecting part; 62. Guide ring part; 7. Disc knife; 8. Compression spring; 9. Protective shell; 10. Support plate; 11. Limiting ring; 12. Knife holder; 13. Upper limit block; 14. Limiting part; 15. Guide plate mounting seat; 16. Thrust ball bearing; 17. Rotating bearing; 18. Pulley; 19. Connecting frame; 20. Intermediate sleeve; 21. Pressing ring; 22. Pressing nut. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0035] like Figure 1 , Figure 2 As shown, this embodiment includes a frame 1, on which a connecting frame 19 for connecting with agricultural machinery is provided, and the connecting frame 19 is hinged to the frame 1. A horizontally arranged transmission shaft 2 is rotatably arranged in the frame 1, and the transmission shaft 2 is mounted on the frame 1 through a bearing. A pulley 18 is fixedly sleeved at one end of the transmission shaft 2, so that the driving mechanism drives the rotation of the transmission shaft 2. A plurality of vertically arranged rotating shafts 3 are rotatably arranged on the frame 1, and the transmission shaft 2 is transmission-connected with the rotating shaft 3 to drive the rotating shaft 3 to axially rotate in the vertical direction. Specifically, a first bevel gear is fixedly sleeved on the transmission shaft 2, and a second bevel gear is fixedly sleeved at the top end of the rotating shaft 3. The first bevel gear and the second bevel gear are meshed, and the transmission shaft 2 and the rotating shaft 3 are transmitted through the bevel gears, so that one transmission shaft 2 can simultaneously drive a plurality of rotating shafts 3 vertically arranged to the transmission shaft 2.

[0036] In order to protect the transmission shaft 2 , an external shell is provided outside the frame 1 to protect the rotation environment of the transmission shaft 2 and prevent foreign matter from entering and affecting the transmission of the transmission shaft 2 and the rotating shaft 3 .

[0037] A mounting groove is provided at the bottom end of the rotating shaft 3, and the upper part of the connecting shaft 4 is arranged in the mounting groove and can move along the length direction of the rotating shaft 3. The upper part of the connecting shaft 4 is connected to the inner wall of the mounting groove through a vertically arranged spline 5. A guide plate 6 is installed at the bottom end of the connecting shaft 4, and a disc knife 7 is fixedly sleeved on the connecting shaft 4, and the disc knife 7 is arranged above the guide plate 6.

[0038] like Figure 3In another embodiment of the utility model, a compression spring 8 is sleeved on the upper part of the connecting shaft 4, the top end of the compression spring 8 is connected to the bottom end of the rotating shaft 3, and the bottom end of the compression spring 8 is connected to the connecting shaft 4 to apply a downward force to the connecting shaft 4. The action of the compression spring 8 can apply a downward force to the connecting shaft 4 to prevent the connecting shaft 4 from being stuck between the connecting shaft 4 and the mounting groove and the connecting shaft 4 from being unable to move downward normally. Specifically, a fixing ring is sleeved on the connecting shaft 4, and the compression spring 8 is arranged between the fixing ring and the bottom end of the rotating shaft 3, with one end of the compression spring 8 abutting against the bottom end of the rotating shaft 3, and the other end abutting against the top end of the fixing ring.

[0039] In an embodiment of the utility model, a plurality of protective shells 9 are fixedly provided at the bottom of the frame 1, and a plurality of rotating shafts 3 are arranged one by one on the inner side of the protective shells 9. The setting of the protective shells 9 can protect the rotating shafts 3 to prevent the corn stems and leaves from being entangled with the rotating shafts 3 due to the rotation of the rotating shafts 3 during operation.

[0040] In an embodiment of the utility model, a support plate 10 is fixedly provided on the inner wall of the protective shell 9, a through hole is provided in the middle of the support plate 10 for the connecting shaft 4 to pass through, and a limiting ring 11 with an outer diameter larger than the inner diameter of the through hole is fixedly provided on the connecting shaft 4. The support plate 10 and the limiting ring 11 are used to limit the downward movement of the connecting shaft 4 to prevent the connecting shaft 4 from detaching from the mounting groove.

[0041] In an embodiment of the utility model, a knife seat 12 is fixedly sleeved on the connecting shaft 4, and the disc knife 7 is sleeved on the connecting shaft 4 and is detachably fixedly connected to the knife seat 12 by bolts. The arrangement of the knife seat 12 can facilitate the replacement of the disc knife 7 as needed.

[0042] The knife seat 12 is provided with a protective tube extending upwards, the protective tube is coaxial with the connecting shaft 4, and the protective tube is arranged outside the protective shell 9 to prevent the connecting shaft 4 from being exposed.

[0043] An upper limit block 13 is fixedly provided on the knife seat 12, and a limit portion 14 for limiting the movement range of the upper limit block 13 is provided on the side wall of the protective shell 9. The setting of the upper limit block 13 and the limit portion 14 can limit the upward movement of the connecting shaft 4 to prevent the connecting shaft 4 from colliding with the rotating shaft 3 and causing damage to the rotating shaft 3 and the connecting shaft 4.

[0044] In the embodiment of the utility model, the bottom end of the connecting shaft 4 is rotatably sleeved with a guide plate mounting seat 15, and the guide plate 6 is detachably fixedly connected to the guide plate mounting seat 15 by bolts. Specifically, the bottom end of the connecting shaft 4 is fixedly sleeved with a thrust ball bearing 16 and a rotating bearing 17 at intervals from bottom to top, and the inner side of the guide plate mounting seat 15 is fixedly clamped between the seat ring of the thrust ball bearing 16 and the outer ring of the rotating shaft 3. The guide plate mounting seat 15 is installed on the connecting shaft 4 through the rotating bearing 17 and the thrust ball bearing 16, so that the guide plate mounting seat 15 can rotate relative to the connecting shaft 4, thereby preventing the guide plate 6 from being damaged by friction with the farmland ground as the connecting shaft 4 rotates.

[0045] The bottom end of the connecting shaft 4 is provided with an external thread section, the external thread section is sleeved with a pressure ring 21, and a clamping nut 22 is provided on the external thread section. An intermediate sleeve 20 is sleeved on the connecting shaft 4 between the fixing ring and the rotating shaft 3. The intermediate sleeve 20 is connected to the connecting shaft 4 through a flat key to ensure that the intermediate sleeve 20 can rotate with the rotation of the connecting shaft 4; the guide plate mounting seat 15 is fixedly sleeved on the intermediate sleeve 20.

[0046] In an embodiment of the utility model, the guide plate 6 includes a connecting portion 61 located in the middle, the connecting portion 61 is connected to the bottom of the connecting shaft 4, and a guide ring portion 62 is arranged on the outside of the connecting portion 61, the outer peripheral wall of the connecting portion 61 is integrally fixedly connected with the inner peripheral wall of the guide ring portion 62, the guide ring portion 62 gradually extends upward from the inside to the outside, and the guide ring portion 62 adopts a structure that gradually extends upward from the inside to the outside. In the process of the agricultural machinery moving forward, the bottom of the guide plate 6 gradually contacts the farmland soil or the remaining roots of the straw and is gradually lifted.

[0047] The connecting portion 61 is provided with an upwardly concave structure centered at the middle of the connecting portion 61 , and the bottom of the concave structure is detachably connected to the guide plate 6 .

[0048] The frame 1 is installed on the agricultural machinery. When working, under the action of gravity, the connecting shaft 4 moves downward to the guide plate 6 and is placed on the bottom of the farmland. The disc knife 7 is lowered as the connecting shaft 4 moves downward. At the same time, the height of the disc knife 7 can be automatically adjusted according to the height of the terrain. Figure 4 As shown, the disc knife 7 can cut the straw along the root of the straw to ensure that the complete straw is retained, which is convenient for baling the cut straw and avoiding waste of straw.

[0049] In the description of the present invention, it should be understood that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A crop stem cutting device, characterized in that: The invention comprises a frame (1), wherein a horizontally arranged transmission shaft (2) is rotatably arranged inside the frame (1), and a plurality of vertically arranged rotating shafts (3) are rotatably arranged on the frame (1); the transmission shaft (2) is transmission-connected with the rotating shaft (3) to drive the rotating shaft (3) to axially rotate in a vertical direction; a mounting groove is arranged at the bottom end of the rotating shaft (3); the upper part of a connecting shaft (4) is arranged in the mounting groove and can move along the length direction of the rotating shaft (3); the upper part of the connecting shaft (4) is connected to the inner wall of the mounting groove through a vertically arranged spline (5); a guide plate (6) is installed at the bottom end of the connecting shaft (4); a disc knife (7) is fixedly sleeved on the connecting shaft (4); and the disc knife (7) is arranged above the guide plate (6).

2. A crop stem cutting device according to claim 1, characterized in that: A compression spring (8) is sleeved on the upper part of the connecting shaft (4), the top end of the compression spring (8) is connected to the bottom end of the rotating shaft (3), and the bottom end of the compression spring (8) is connected to the connecting shaft (4) for applying a downward force to the connecting shaft (4).

3. The crop stem cutting device according to claim 1, characterized in that: A first bevel gear is fixedly sleeved on the transmission shaft (2), a second bevel gear is fixedly sleeved on the top end of the rotating shaft (3), and the first bevel gear is meshed with the second bevel gear.

4. The crop stem cutting device according to claim 1, characterized in that: A plurality of protective shells (9) are fixedly provided at the bottom of the frame (1), and the plurality of rotating shafts (3) are arranged one by one on the inner side of the protective shells (9).

5. The crop stem cutting device according to claim 4, characterized in that: A support plate (10) is fixedly provided on the inner wall of the protective shell (9), a through hole is provided in the middle of the support plate (10) for the connecting shaft (4) to pass through, and a limiting ring (11) having an outer diameter greater than an inner diameter of the through hole is fixedly sleeved on the connecting shaft (4).

6. A crop stem cutting device according to claim 4 or 5, characterized in that: A knife seat (12) is fixedly sleeved on the connecting shaft (4), and the disc knife (7) is sleeved on the connecting shaft (4) and is detachably fixedly connected to the knife seat (12) via bolts.

7. The crop stem cutting device according to claim 6, characterized in that: An upper limit block (13) is fixedly provided on the knife seat (12), and a limiting portion (14) for limiting the movement range of the upper limit block (13) is provided on the side wall of the protective shell (9).

8. A crop stem cutting device according to any one of claims 1 to 5, characterized in that: The bottom end of the connecting shaft (4) is rotatably sleeved with a guide disc mounting seat (15), and the guide disc (6) is detachably fixedly connected to the guide disc mounting seat (15) via bolts.

9. The crop stem cutting device according to claim 8, characterized in that: The bottom end of the connecting shaft (4) is fixedly sleeved with a thrust ball bearing (16) and a rotating bearing (17) at intervals from bottom to top, and the inner side of the guide plate mounting seat (15) is fixedly clamped between the seat ring of the thrust ball bearing (16) and the outer ring of the rotating shaft (3).

10. A crop stem cutting device according to any one of claims 1 to 5, characterized in that: The guide plate (6) comprises a connecting portion (61) located in the middle, and a guide ring portion (62) arranged outside the connecting portion (61), the connecting portion (61) is connected to the bottom of the connecting shaft (4), the outer peripheral wall of the connecting portion (61) is integrally fixedly connected to the inner peripheral wall of the guide ring portion (62), and the guide ring portion (62) gradually extends upward from the inside to the outside.

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