Stem pulling unit for corn harvester capable of harvesting stalks and ears and corn harvester capable of harvesting stalks and ears

Abstract

The utility model relates to the technical field of corn harvesters, in particular to a stem pulling unit for a corn harvester capable of harvesting stems and ears, which comprises a frame and a structure used for supporting the whole stem pulling unit, an operation cavity is arranged in the frame, and a feed port is arranged at the front end of the operation cavity; the transmission gear box provides power transmission for the stem pulling roller; the two stem pulling rollers are respectively a left stem pulling roller and a right stem pulling roller, are respectively arranged on two opposite sides of the operation cavity in the rack, and are used for executing stem pulling action; a gap adjusting structure is arranged on the stem pulling rollers and is used for adjusting a gap between the two stem pulling rollers; the baffle is used for limiting the whole corn plant and assisting in guiding the whole corn plant to enter the stem pulling unit; and the seedling pulling chain is used for assisting in pulling and conveying the whole corn plants passing through the stem pulling roller. The silage whole-plant corn can be harvested by the stalk and spike harvesting corn machine, the operation period of the stalk and spike harvesting corn machine is prolonged, the income of a user is increased, and the investment risk of the user is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of corn harvesters, and in particular to a pulling stem unit for a corn harvester capable of harvesting both stalks and ears, and a corn harvester capable of harvesting both stalks and ears. Background Art

[0002] Silage corn is an ideal feed for raising cattle and sheep. It has the advantages of high biological yield, good fiber quality, appropriate dry matter and moisture content, rich nutrition, fragrant smell, high digestibility, etc., and has been promoted for planting in China in recent years. At present, silage corn is mainly harvested by self-propelled silage corn harvesters, and its main harvesting structure consists of a silage cutter bar, a feeding unit, a chopper, a kernel crusher, and a throwing unit. When the silage harvester is working, first, the whole-plant corn is recycled and extruded by the silage cutter bar and the feeding unit and sent into the chopper; then, the chopper cuts the corn into sections and throws it to the kernel crusher to complete the kernel crushing; finally, the throwing unit completes the material throwing and recycling.

[0003] As an agricultural machine specialized in harvesting silage corn, the silage corn harvester has the advantages of strong professionalism, high quality of forage, high operating efficiency, etc. However, its disadvantages such as high overall machine cost, large size, single operating condition, short operating season, etc., make farmers face problems such as large upfront investment, slow return on investment, low vehicle utilization rate, inability to harvest small plots, high accessory costs, etc., resulting in an increased investment risk for farmers.

[0004] At present, there are mainly two schemes for harvesting whole-plant corn: 1. Harvesting with a silage corn harvester. 2. Harvesting with a green and yellow silage corn harvester.

[0005] Disadvantages of the Existing Technology

[0006] 1. Disadvantages of the silage corn harvester scheme: high cost, large investment; large size, unable to harvest small plots, short operating season, single operating type, low overall machine utilization rate; high accessory cost; large investment risk.

[0007] 2. Disadvantages of the green and yellow silage corn harvester scheme: need to purchase and replace a silage cutter bar, which is time-consuming, laborious and costly; the chopping quality is lacking, and the user acceptance rate is low; the overall machine operating reliability and stability are poor. Content of the Utility Model

[0008] The purpose of the utility model is to provide a pulling stem unit for a corn harvester capable of harvesting both stalks and ears, which can enable the corn harvester capable of harvesting both stalks and ears to harvest whole-plant silage corn, extend the operating cycle of the corn harvester capable of harvesting both stalks and ears, increase the user's income, and reduce the user's investment risk.

[0009] Another purpose of the utility model is to provide a corn harvester capable of harvesting both stalks and ears, which can enable the corn harvester capable of harvesting both stalks and ears to harvest whole-plant silage corn, extend the operating cycle of the corn harvester capable of harvesting both stalks and ears, increase the user's income, and reduce the user's investment risk.

[0010] The technical solution of the utility model is achieved in this way:

[0011] A stalk pulling unit for a stalk-ear and stalk corn harvester, comprising:

[0012] A frame, used to support the structure of the entire stem pulling unit, wherein a working chamber is provided in the frame, and a feed port is provided at the front end of the working chamber;

[0013] Transmission gear box, providing power transmission for the stem pulling roller;

[0014] Two stem pulling rollers, namely a left stem pulling roller and a right stem pulling roller, are respectively installed on opposite sides of the working chamber in the frame and are used to perform the stem pulling action; a gap adjustment structure is provided on the stem pulling roller, which is used to adjust the gap between the two stem pulling rollers;

[0015] The baffle is used to limit the position of the whole corn plant and assist in guiding the whole corn plant into the stem pulling unit;

[0016] A reed chain is used to assist in moving and conveying the whole corn plant through the stalk pull rollers.

[0017] Furthermore, the stem pulling roller comprises:

[0018] A rear mounting seat, the output end of the transmission gear box is connected to the rear mounting seat for transmission, and the transmission gear box is used to transmit power to the stem pulling roller;

[0019] A blade mounting shaft connected to the rear mounting seat and used for fixing the blade;

[0020] a blade, mounted on the blade mounting shaft, for grabbing and pulling corn stalks;

[0021] A guide cone is installed at the front end of the blade installation shaft and is used to guide the whole corn plant to enter;

[0022] The gap adjustment structure is arranged on the frame and is used for adjusting the gap between the two stem pulling rollers.

[0023] Furthermore, the gap adjustment structure includes:

[0024] A front support, arranged at the front end of the blade mounting shaft and behind the guide cone, the front support is rotatably connected to the blade mounting shaft and is used in conjunction with an adjusting screw to adjust the gap between the stem pulling units;

[0025] An adjusting screw, wherein a through hole is provided on the frame, the adjusting screw is passed through the through hole, and one end of the adjusting screw is connected to the front support;

[0026] Locking nuts, at least two of the locking nuts are installed on the adjusting screw, and the two locking nuts are respectively located on both sides of the through hole.

[0027] Further, the blade has a structure that is narrow at the front and wide at the rear.

[0028] Further, when the blades on the two pulling stalk rollers are symmetrically arranged, the pulling stalk unit is in the tool alignment state; when the blades on the two pulling stalk rollers are staggered, the pulling stalk unit is in the tool misalignment state;

[0029] The pulling stalk unit has an initial state and a limit state, and the position of the adjusting screw in the through hole is adjusted to switch between the initial state and the limit state.

[0030] Further, when the pulling stalk unit is in the initial state and in the tool alignment state, the minimum clearance at the tail end between the blades of the two pulling stalk rollers is 4 mm, and the maximum clearance at the front end is 11 mm;

[0031] When the pulling stalk unit is in the initial state and in the tool misalignment state, the clearance between the two pulling stalk rollers is 35 mm.

[0032] Further, when the pulling stalk unit is in the limit state and in the tool alignment state, the minimum clearance at the tail end between the blades of the two pulling stalk rollers is 6 mm, and the maximum clearance at the front end is 33 mm;

[0033] When the pulling stalk unit is in the limit state and in the tool misalignment state, the minimum clearance at the tail end between the blades of the two pulling stalk rollers is 36 mm, and the maximum clearance at the front end is 60 mm.

[0034] Further, the blade mounting shaft is made of square steel shaft.

[0035] A corn harvester for harvesting both ears and stalks includes the pulling stalk unit for the corn harvester for harvesting both ears and stalks.

[0036] Compared with the prior art, the beneficial effects of the present utility model are:

[0037] The present application develops a new type of pulling stalk unit for a corn harvester for harvesting both ears and whole plants based on the tool alignment pulling stalk rollers, and uses the gap adjustment structure to freely adjust the gap between the two pulling stalk rollers to adapt to corn cobs of more sizes, adapt to various corn plants with different growth conditions, improve the utilization rate of the whole machine, so that the corn harvester for harvesting both ears and stalks can harvest silage whole plants of corn, extend the operation cycle of the corn harvester for harvesting both ears and stalks, increase the income of the machine operator, reduce the investment risk of users, and at the same time the overall structure is simple and the cost is lower. Brief Description of the Drawings

[0038] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0039] Figure 1 Structural schematic diagram of the stem pulling unit of the present invention;

[0040] Figure 2 Another structural view of the stem pulling unit of the present invention;

[0041] Figure 3 Structural schematic diagram of two stem pulling rollers of the present invention;

[0042] Figure 4 Structural schematic diagram of the tool setting state of the stem pulling unit of the present invention in the initial state;

[0043] Figure 5 Structural schematic diagram of the wrong tool state of the stem pulling unit of the present invention in the initial state;

[0044] Figure 6 Structural schematic diagram of the tool setting state of the stem pulling unit of the present invention in the limit state;

[0045] Figure 7 Structural schematic diagram of the wrong tool state of the stem pulling unit of the present invention in the limit state.

[0046] In the figure:

[0047] 1 - Stem pulling roller; 101 - Rear mounting seat; 102 - Blade mounting shaft; 103 - Blade; 104 - Guide cone; 105 - Front support; 106 - Adjusting screw; 107 - Locking nut;

[0048] 2 - Frame; 3 - Transmission gearbox; 4 - Baffle; 5 - Reel chain. Detailed implementation manners

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0050] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention claimed, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts fall within the scope of protection of the present invention.

[0051] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0052] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is habitually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0053] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0054] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The following will, with reference to the accompanying drawings, elaborate on some embodiments of the present invention. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0056] Embodiment 1

[0057] Value of silage corn: As a high-quality feed for cattle and sheep, silage corn has many advantages, such as high yield and rich nutrition, and is therefore popular.

[0058] Existing technical problems:

[0059] Although professional silage corn harvesters have good harvest quality, they are expensive and large in size, making them difficult to adapt to small plots of land.

[0060] Using a silage corn harvester requires the purchase of additional equipment parts, and the harvesting quality and reliability are insufficient.

[0061] Problem to be solved: This invention proposes a new stalk pulling unit, which aims to enable the existing stalk-and-ear corn harvester to efficiently harvest whole-plant corn for silage, thereby extending the operating cycle of the equipment. When the corn harvester can adapt to corn of more sizes, the operator's workload will be greater, which can increase the operator's income and reduce the user's investment risk.

[0062] Reference Figures 1-7 This embodiment provides a stalk pulling unit for a corn harvester for harvesting both stalks and ears, which includes (such as Figure 1 and Figure 2 ):

[0063] The frame 2 is used to support the structure of the entire stem pulling unit. A working chamber is provided in the frame 2. The front end of the working chamber has a feed port, which is in the shape of an expanded trumpet to facilitate feeding.

[0064] The transmission gear box 3 provides power transmission for the stem pulling roller 1, driving the stem pulling roller 1 to rotate;

[0065] Two stem pulling rollers 1, namely a left stem pulling roller 1 and a right stem pulling roller 1, are respectively installed on opposite sides of the working chamber in the frame 2, and are used to perform the stem pulling action; a gap adjustment structure is provided on the stem pulling roller 1, which is used to adjust the gap between the two stem pulling rollers 1 to adapt to corn crops of different sizes;

[0066] The baffle 4 is used to limit the position of the whole corn plant and assist in guiding the whole corn plant into the stem pulling unit; the stem pulling roller 1 is located inside the baffle 4 and plays a role in limiting the position of the crop;

[0067] The straw chain 5 is used to assist in moving and conveying the whole corn plant passing through the stem pulling roller 1.

[0068] In this embodiment, the stem pulling roller 1 includes (such as Figure 3 ):

[0069] A rear mounting seat 101, the output end of the transmission gear box 3 is connected to the rear mounting seat 101 for transmission, and the transmission gear box 3 is used to transmit power to the stem pulling roller 1; the transmission gear box 3 has at least two output shafts, which are respectively connected to the rear mounting seats 101 of the two stem pulling rollers 1 to drive the two stem pulling rollers 1 to rotate relative to each other (reverse rotation);

[0070] The blade mounting shaft 102 is connected to the rear mounting seat 101 and is used to fix the blade 103. The blade mounting shaft 102 can be a square steel shaft. Blades 103 are respectively arranged on each side of the square steel shaft along its axial direction, and multiple blades 103 are evenly distributed around its axial direction.

[0071] The blade 103 is mounted on the blade mounting shaft 102 and is used to grasp and pull the corn stalks. The blade 103 is the main component for the stalk pulling operation. The blade 103 is designed in the form of being narrower at the front and wider at the rear (i.e., the size of the tail end is wider and the size of the front end is narrower), which can ensure that the whole corn plant can be pulled by the stalk pulling roller 1.

[0072] The guiding cone 104 is mounted at the front end of the blade mounting shaft 102 and is used to guide the whole corn plant into the stalk pulling unit.

[0073] The gap adjusting structure is arranged on the frame 2 and is used to adjust the gap between the two stalk pulling rollers 1 to adapt to whole corn plants of different sizes.

[0074] The gap adjusting structure includes (such as Figure 3 ):

[0075] The front support 105 is arranged at the front end of the blade mounting shaft 102 and behind the guiding cone 104. The front support 105 is rotatably connected to the blade mounting shaft 102 and is used in cooperation with the adjusting screw 106 to adjust the gap between the stalk pulling units. The front support 105 can be a bearing seat, and it can be rotatably connected to the blade mounting shaft 102 through a bearing.

[0076] The adjusting screw 106. A through hole is formed on the frame 2, and the adjusting screw 106 passes through the through hole, and one end of the adjusting screw 106 is connected to the front support 105. By moving the adjusting screw 106 in the through hole and changing the relative position of the adjusting screw 106 in the through hole, the stalk pulling roller 1 can be pushed and pulled, driving the relative displacement of the two stalk pulling rollers 1 to adjust their gap.

[0077] The locking nut 107. At least two locking nuts 107 are mounted on the adjusting screw 106, and the two locking nuts 107 are respectively located on both sides of the through hole. Two locking nuts 107 can be arranged on the adjusting screw 106, respectively located on both sides of the through hole. After adjusting the position of the adjusting screw 106 and adjusting the gap between the two stalk pulling rollers 1, the locking nuts 107 on both sides can be locked. During the rotation of the stalk pulling roller 1, since the front support 105 and the blade mounting shaft 102 rotate relative to each other, they do not affect each other.

[0078] The pin shaft is used for the positioning and assembly of the components of the stalk pulling roller 1.

[0079] The stalk pulling unit in this solution has at least four working states:

[0080] 1. The tool setting state in the initial state (such as Figure 4 );

[0081] 2. The incorrect tool setting state in the initial state (such as Figure 5 );

[0082] 3. The tool setting state in the limit state (such as Figure 6 );

[0083] 4. The incorrect tool setting state in the limit state (such as Figure 7 ).

[0084] It should be noted that the stalk pulling unit has an initial state and a limit state, and these two states are determined according to the gap size between the two stalk pulling rollers 1 to adapt to cobs of different sizes; in the initial state, it can adapt to smaller-sized cobs; in the limit state, the stalk pulling roller 1 rotates to the limit position to make the front-end gap the largest, so as to adapt to larger-sized cobs; and the initial state and the limit state are switched by adjusting the position of the adjusting screw 106 in the through hole.

[0085] The stalk pulling unit further includes a tool setting state and an incorrect tool setting state, and these two states are determined according to the positions of the blades 103 on the two stalk pulling rollers 1; when the blades 103 on the two stalk pulling rollers 1 are symmetrically arranged, the stalk pulling unit is in the tool setting state; when the blades 103 on the two stalk pulling rollers 1 are staggered, the stalk pulling unit is in the incorrect tool setting state.

[0086] In this embodiment, a preferred implementation manner is provided:

[0087] When the stalk pulling unit is in the initial state and the tool setting state, the minimum tail-end gap between the blades 103 of the two stalk pulling rollers 1 is 4 mm, and the maximum front-end gap is 11 mm;

[0088] When the stalk pulling unit is in the initial state and the incorrect tool setting state, the gap between the two stalk pulling rollers 1 is 35 mm;

[0089] When the stalk pulling unit is in the limit state and the tool setting state, the minimum tail-end gap between the blades 103 of the two stalk pulling rollers 1 is 6 mm, and the maximum front-end gap is 33 mm;

[0090] When the stalk pulling unit is in the limit state and the incorrect tool setting state, the minimum tail-end gap between the blades 103 of the two stalk pulling rollers 1 is 36 mm, and the maximum front-end gap is 60 mm.

[0091] When the pulling stem roller 1 is in the initial state (initial position) and the tool setting state is formed, the minimum clearance at the tail end between the blades 103 of the pulling stem roller 1 is 4 mm, and the maximum clearance at the front end is 11 mm, which can ensure that the corn stalks are grabbed and pulled by the pulling stem blades 103; furthermore, when the pulling stem roller 1 rotates to the flat blade state, the clearance between the pulling stem rollers 1 is 35 mm. At this time, it can ensure that the cobs of general silage corn enter the lower cutting table through the pulling stem roller 1 and are preliminarily squeezed and broken by the pulling stem roller 1, achieving the effect of preliminary grain breaking.

[0092] By adjusting the front end clearance adjustment structure of the pulling stem roller 1, the clearance between the pulling stem rollers 1 can be adjusted to adapt to corn cobs of more sizes. When the left and right pulling stem rollers 1 are adjusted outwards to the limit state (limit position): the minimum clearance at the tail end between the blades 103 of the pulling stem roller 1 in the tool setting state is 6 mm, and the maximum clearance at the front end is 33 mm; furthermore, when the pulling stem roller 1 rotates to the flat blade state, the minimum clearance at the tail end is 36 mm, and the maximum clearance at the front end is 60 mm, which can adapt to various corns with different growth conditions, improving the overall machine utilization rate.

[0093] Embodiment 2

[0094] A corn harvester capable of harvesting both stalks and ears includes the pulling stem unit for the corn harvester capable of harvesting both stalks and ears described above.

[0095] This application optimizes the existing corn harvester capable of harvesting both stalks and ears through the design of the structure of the blade 103 and the mechanism with adjustable clearance of the pulling stem roller 1, enabling it to not only effectively harvest whole-plant corn, but also reduce costs and improve operation efficiency, adapt to corn cobs of more sizes, adapt to various corns with different growth conditions, improve the overall machine utilization rate, so that the corn harvester capable of harvesting both stalks and ears can harvest silage whole-plant corn, extend the operation cycle of the corn harvester capable of harvesting both stalks and ears, increase the income of the machine operator, and also reduce the investment risk of users. At the same time, the overall structure is simple and the cost is lower. At the same time, the frame 2 used in the pulling stem unit of this scheme can also be common with the double-ear picking unit frame of the corn harvester capable of harvesting both stalks and ears. Therefore, when replacing, only four sets of pulling stem rollers 1 need to be replaced, with lower cost, and the time and difficulty of replacement are better than those of the green and yellow silage model when replacing the silage cutting table.

[0096] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

[0097] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pulling stem unit for a corn harvester capable of harvesting both stems and ears, characterized in that, include: A frame (2) is used to support the structure of the entire stem pulling unit, wherein a working chamber is provided in the frame (2), and a feed port is provided at the front end of the working chamber; A transmission gear box (3) provides power transmission for the stem pulling roller (1); Two stem pulling rollers (1), namely a left stem pulling roller (1) and a right stem pulling roller (1), are respectively mounted on opposite sides of the working chamber in the frame (2) and are used to perform the stem pulling action; a gap adjustment structure is provided on the stem pulling roller (1) for adjusting the gap between the two stem pulling rollers (1); The baffle (4) is used to limit the position of the whole corn plant and assist in guiding the whole corn plant into the stem pulling unit; The straw chain (5) is used to assist in moving and conveying the whole corn plant passing through the stem pulling roller (1).

2. The pulling stem unit for the corn harvester capable of harvesting both stalks and ears according to claim 1, wherein, The stem pulling roller (1) comprises: A rear mounting seat (101), the output end of the transmission gear box (3) being connected to the rear mounting seat (101) for transmission, and the transmission gear box (3) being used to transmit power to the stem pulling roller (1); A blade mounting shaft (102), connected to the rear mounting seat (101) and used for fixing the blade (103); A blade (103) mounted on the blade mounting shaft (102) for grabbing and pulling corn stalks; A guide cone (104) is mounted on the front end of the blade mounting shaft (102) and is used to guide the entire corn plant to enter; A gap adjustment structure is arranged on the frame (2) and is used to adjust the gap between the two stem pulling rollers (1).

3. The pulling stem unit for the corn harvester capable of harvesting both stalks and ears according to claim 2, characterized in that, The gap adjustment structure comprises: A front support (105) is arranged at the front end of the blade mounting shaft (102) and is located behind the guide cone (104). The front support (105) is rotatably connected to the blade mounting shaft (102) and is used in conjunction with an adjusting screw (106) to adjust the gap between the pull stem units. An adjusting screw (106), wherein a through hole is provided on the frame (2), the adjusting screw (106) is passed through the through hole, and one end of the adjusting screw (106) is connected to the front support (105); A locking nut (107), at least two of the locking nuts (107) are installed on the adjusting screw (106), and the two locking nuts (107) are respectively located on two sides of the through hole.

4. The pulling stem unit for the corn harvester capable of harvesting both stalks and ears according to claim 3, characterized in that, The blade (103) is of a structure that is narrow at the front and wide at the back.

5. The pulling stalk unit for the corn harvester capable of harvesting both stalks and ears according to claim 4, characterized in that, When the blades (103) on the two stem-pulling rollers (1) are symmetrically arranged, the stem-pulling unit is in a blade-aligning state; when the blades (103) on the two stem-pulling rollers (1) are staggered, the stem-pulling unit is in a blade-staggering state; The stem pulling unit has an initial state and a limit state, and the initial state and the limit state are switched by adjusting the position of the adjusting screw (106) in the through hole.

6. The pulling stem unit for the corn harvester capable of harvesting both stalks and ears according to claim 5, characterized in that, When the stem pulling unit is in the initial state and in the blade alignment state, the minimum gap between the blades (103) of the two stem pulling rollers (1) is 4 mm at the rear end and 11 mm at the front end; When the stem pulling unit is in an initial state and in a knife-misaligned state, the gap between the two stem pulling rollers (1) is 35 mm.

7. The pulling stalk unit for the corn harvester capable of harvesting both stalks and ears according to claim 5, characterized in that, When the pulling stem unit is in the limit state and in the tool setting state, the minimum clearance at the tail end between the blades (103) of the two pulling stem rollers (1) is 6 mm, and the maximum clearance at the front end is 33 mm; When the pulling stem unit is in the limit state and in the staggered tool state, the minimum clearance at the tail end between the blades (103) of the two pulling stem rollers (1) is 36 mm, and the maximum clearance at the front end is 60 mm.

8. The pulling stem unit for the corn harvester capable of harvesting both stalks and ears according to claim 2, characterized in that, The blade mounting shaft (102) is made of square steel shaft.

9. A corn harvester capable of harvesting both stalks and ears, characterized in that, It includes the pulling stem unit for the corn harvester with combined harvesting of stalks and ears according to any one of claims 1-8.

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