Header stalk chopping mechanism, header and harvester

Abstract

The utility model relates to the technical field of harvesting machinery, in particular to a header stalk chopping mechanism, a header and a harvester, which comprises an upper flail knife component and a lower flail knife component which are arranged at an interval up and down, and a power shaft mounting hole is formed in the center of the top of the upper flail knife component. A plurality of supporting sleeves are arranged between the upper flail knife assembly and the lower flail knife assembly, and the supporting sleeves are detachably connected with the upper flail knife assembly and the lower flail knife assembly correspondingly so that the supporting sleeves of different lengths can be replaced according to the requirement for the distance between the upper flail knife assembly and the lower flail knife assembly. The utility model has the beneficial effects that the arrangement of the double-layer flail knife assembly can ensure a better stubble height, and meanwhile, the stalk chopping effect is greatly improved; different assembling heights of the lower flail knife assembly can be achieved by adjusting the height of the arranged supporting sleeve, and therefore different harvesting requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of harvesting machinery, in particular to a cutting table stalk chopping mechanism, a cutting table and a harvester. Background Art

[0002] At present, there are two main types of stalk chopping mechanisms installed on the harvester's header. One is a stalk chopping mechanism with a fling knife installed below the ear picking device, and the other is a stalk chopper installed below the ear picking frame. This state has a limited use area due to the small ground clearance. The above two states can be raised and lowered with the header, and the installation height cannot be adjusted. When harvesting high-stem crops or the header cannot be harvested in the lowest state, raising the header for harvesting can lead to large deviations in the height of the stalk stubble, poor stalk crushing effect, and easy to cause user complaints; lowering the header for harvesting can increase the load on the stalk pulling roller, affecting the performance of the feeding and debris removal components, causing user dissatisfaction. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a cutting table stalk chopping mechanism, a cutting table and a harvester to solve the above problems existing in the prior art.

[0004] The utility model provides a technical solution to the above-mentioned technical problems as follows: a stem chopping mechanism for a cutting platform, comprising an upper blade assembly and a lower blade assembly spaced apart from each other, a power shaft mounting hole being provided at the top center of the upper blade assembly, a plurality of supporting sleeves being provided between the upper blade assembly and the lower blade assembly, the supporting sleeves being detachably connected to the upper blade assembly and the lower blade assembly, respectively, and being used for replacing supporting sleeves of different lengths according to the spacing between the upper blade assembly and the lower blade assembly.

[0005] The beneficial effects of the utility model are as follows: the setting of the double-layer blade-flinging assembly can ensure a good stubble height, while greatly improving the stem chopping effect; by adjusting the height of the setting support sleeve, different assembly heights of the lower blade-flinging assembly can be achieved, thereby meeting different harvesting requirements.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, there are two support sleeves, which are symmetrically arranged about the axis of the power shaft mounting hole. A fixing bolt is provided in each support sleeve, and the head of the fixing bolt is provided below the lower blade swinging assembly. The screw end of the fixing bolt passes through and extends out of the lower blade swinging assembly, the support sleeve and the upper blade swinging assembly in sequence and is threadedly connected with a fixing nut.

[0008] The beneficial effect of adopting the above further solution is that the support sleeve is fixedly installed by fixing bolts and fixing nuts, and installation and disassembly are convenient, thereby facilitating replacement of support sleeves of different lengths as needed.

[0009] Furthermore, the support sleeve is connected to the upper blade-flinging assembly and the lower blade-flinging assembly via a height adjustment assembly, so as to adjust the distance between the support sleeve and the upper blade-flinging assembly and / or the lower blade-flinging assembly.

[0010] The beneficial effect of adopting the above further scheme is that by setting a height adjustment component, the distance between the support sleeve and the upper blade assembly and / or the lower blade assembly can be adjusted, thereby adjusting the distance between the upper blade assembly and the lower blade assembly to meet the needs of different stubble heights.

[0011] Furthermore, the height adjustment assembly includes a spring seat, a compression spring, a connecting bolt and a connecting nut. The bottom of the support sleeve is fixedly connected to a support plate, and the support plate abuts on the upper surface of the lower knife swinging assembly. The compression spring is arranged in the support sleeve, and the bottom end of the compression spring abuts the support plate. The lower part of the spring seat is slidably arranged in the support sleeve, and the bottom end of the spring seat abuts the top end of the compression spring, and the top end of the spring seat abuts the lower surface of the upper knife swinging assembly. The screw end of the connecting bolt passes through and extends out of the lower knife swinging assembly, the compression spring, the spring seat and the upper knife swinging assembly in sequence and is threadedly connected to the connecting nut.

[0012] The beneficial effect of adopting the above-mentioned further scheme is: since the two ends of the compression spring are always in contact with the spring seat and the support plate, the upper blade assembly and the lower blade assembly are in a separated state under the action of the compression spring, and the distance between the upper blade assembly and the lower blade assembly can be adjusted by adjusting the connecting nut to meet the needs of different stubble heights.

[0013] Furthermore, the height adjustment assembly includes an upper connecting threaded column fixedly connected to the lower surface of the upper blade swinging assembly, and a lower connecting threaded column fixedly connected to the upper surface of the lower blade swinging assembly. An internal thread is provided on the inner wall of the support sleeve. The upper part of the support sleeve is threadedly connected to the upper connecting threaded column, and the lower part of the support sleeve is threadedly connected to the lower connecting threaded column. The axial rotation of the support sleeve drives the upper connecting threaded column and the lower connecting threaded column to move away from or closer to each other.

[0014] The beneficial effect of adopting the above further scheme is: by axially rotating the supporting sleeve, the upper connecting threaded column and the lower connecting threaded column are moved away from or closer to each other, thereby adjusting the distance between the upper and lower knife-flinging assemblies to meet the needs of different stubble heights.

[0015] Furthermore, the upper connecting threaded column is connected to the upper knife-flinging assembly via a mounting bolt, and the lower connecting threaded column is connected to the lower knife-flinging assembly via a mounting bolt.

[0016] The beneficial effect of adopting the above further solution is that the installation and removal of the upper connecting threaded column and the lower connecting threaded column are convenient.

[0017] Furthermore, the upper swing knife assembly includes an upper top knife holder and a lower top knife holder arranged in parallel up and down, and two upper swing knives fixedly clamped between the upper top knife holder and the lower top knife holder at one end, and the two upper swing knives are symmetrically arranged about the axis of the power shaft mounting hole.

[0018] The beneficial effect of adopting the above further solution is that the two upper swing knives are clamped and fixed by the upper top knife holder and the lower top knife holder, which makes installation and disassembly convenient.

[0019] Furthermore, the lower blade assembly includes an upper blade holder and a lower blade holder arranged in parallel up and down, and two lower blades fixedly clamped between the upper blade holder and the lower blade holder at one end, and the two lower blades are symmetrically arranged about the axis of the power shaft mounting hole.

[0020] The beneficial effect of adopting the above further solution is that the two lower swing knives are clamped and fixed by the upper bottom knife holder and the lower bottom knife holder, which is convenient for installation and disassembly.

[0021] The utility model solves the above technical problem and further provides a cutting platform, comprising the above-mentioned cutting platform stem chopping mechanism.

[0022] The beneficial effects of adopting the above scheme are: the setting of the double-layer blade assembly can ensure a good stubble height, while greatly improving the stem chopping effect; by adjusting the height of the set support sleeve, different assembly heights of the lower blade assembly can be achieved, thereby meeting different harvesting requirements.

[0023] The utility model solves the above technical problem and further provides a harvester, comprising the above-mentioned cutting platform.

[0024] The beneficial effects of adopting the above scheme are: the setting of the double-layer blade assembly can ensure a good stubble height, while greatly improving the stem chopping effect; by adjusting the height of the set support sleeve, different assembly heights of the lower blade assembly can be achieved, thereby meeting different harvesting requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a side view of the first embodiment of the utility model;

[0026] Figure 2 It is a side plan view of the first embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0028] Figure 4 It is a cross-sectional view of the second embodiment of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the third embodiment of the present utility model;

[0030] Figure 6 It is a cross-sectional view of the third embodiment of the present utility model;

[0031] Figure 7 It is a structural schematic diagram of the upper blade-flinging assembly in the utility model;

[0032] Figure 8 It is a structural schematic diagram of the lower blade-flinging assembly in the utility model;

[0033] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0034] 1. Upper swing knife assembly; 1-1. Upper top knife holder; 1-2. Lower top knife holder; 1-3. Upper swing knife; 2. Lower swing knife assembly; 2-1. Upper bottom knife holder; 2-2. Lower bottom knife holder; 2-3. Lower swing knife; 3. Power shaft mounting hole; 4. Support sleeve; 5. Fixing bolt; 6. Fixing nut; 7. Spring seat; 8. Compression spring; 9. Connecting bolt; 10. Connecting nut; 11. Support plate; 12. Upper connecting threaded column; 13. Lower connecting threaded column; 14. Mounting bolt; 15. Limit block. DETAILED DESCRIPTION

[0035] 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.

[0036] Embodiment 1

[0037] like Figure 1 , Figure 2 As shown, this embodiment includes an upper blade-flinging assembly 1 and a lower blade-flinging assembly 2 which are spaced apart from each other. A power shaft mounting hole 3 is provided at the top center of the upper blade-flinging assembly 1. A plurality of supporting sleeves 4 are provided between the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2. The supporting sleeves 4 are detachably connected to the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2, respectively, and are used to replace supporting sleeves 4 of different lengths according to the spacing between the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2.

[0038] In this embodiment, there are two support sleeves 4, and the two support sleeves 4 are symmetrically arranged with respect to the axis of the power shaft mounting hole 3. A fixing bolt 5 is provided in each support sleeve 4, and the head of the fixing bolt 5 is provided below the lower blade-flinging assembly 2. The screw end of the fixing bolt 5 passes through and extends out of the lower blade-flinging assembly 2, the support sleeve 4 and the upper blade-flinging assembly 1 in turn, and is threadedly connected with the fixing nut 6. The support sleeve 4 is fixedly installed by the fixing bolt 5 and the fixing nut 6, and is convenient to install and disassemble, thereby facilitating replacement of support sleeves 4 of different lengths as needed.

[0039] like Figure 7 As shown, in the present embodiment, the upper blade assembly 1 comprises an upper blade holder 1-1 and a lower blade holder 1-2 which are arranged in parallel up and down, and two upper blades 1-3 which are fixedly clamped between the upper blade holder 1-1 and the lower blade holder 1-2 at one end, the two upper blades 1-3 are symmetrically arranged with respect to the axis of the power shaft mounting hole 3, the two upper blades 1-3 are clamped and fixed by the upper blade holder 1-1 and the lower blade holder 1-2, the upper blade holder 1-1 and the lower blade holder 1-2 are fixedly connected by bolts, specifically, the number of bolts connecting the upper blade holder 1-1 and the lower blade holder 1-2 is two, the two bolts sequentially pass through the upper blade holder 1-1, the upper blade 1-3 and the lower blade holder 1-2 and are then fastened and fixed by nuts, and the installation and disassembly are convenient.

[0040] In this embodiment, in order to avoid different spacings between the upper top tool holder 1-1 and the lower top tool holder 1-2 due to inaccurate control of the locking force of the bolts and nuts, a limit block 15 is provided between the upper top tool holder 1-1 and the lower top tool holder 1-2. The thickness of the limit block 15 is the same as the thickness of the portion of the upper swing knife 1-3 arranged between the upper top tool holder 1-1 and the lower top tool holder 1-2. In order to facilitate the fixation of the limit block 15, the number of the limit blocks 15 is two, and the two fixing bolts 5 pass through the two limit blocks 15 respectively.

[0041] like Figure 8 As shown, the lower blade assembly 2 includes an upper blade holder 2-1 and a lower blade holder 2-2 which are arranged in parallel up and down, and two lower blades 2-3 which are fixedly clamped between the upper blade holder 2-1 and the lower blade holder 2-2 at one end. The two lower blades 2-3 are symmetrically arranged with respect to the axis of the power shaft mounting hole 3. The two lower blades 2-3 are clamped and fixed by the upper blade holder 2-1 and the lower blade holder 2-2, which facilitates installation and disassembly.

[0042] In this embodiment, the two fixing bolts 5 pass through the lower tool holder 2-2, the lower swing knife 2-3 and the upper tool holder 2-1 respectively, and the lower tool holder 2-2 and the lower tool holder 2-2 are clamped by the support sleeve 4 and the bolt head of the fixing bolt 5, and the lower swing knife 2-3 is positioned at the same time.

[0043] In this embodiment, in order to avoid radial displacement of the support sleeve 4, the lower surface of the lower top tool holder 1-2 and the upper surface of the upper bottom tool holder 2-1 are provided with annular grooves matching the support sleeve 4, and the top and bottom ends of the support sleeve 4 are respectively arranged in the two annular grooves.

[0044] Embodiment 2

[0045] like Figure 3 , Figure 4 As shown, this embodiment includes an upper blade-flinging assembly 1 and a lower blade-flinging assembly 2 which are spaced apart from each other. A power shaft mounting hole 3 is provided at the top center of the upper blade-flinging assembly 1. A plurality of supporting sleeves 4 are provided between the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2. The supporting sleeves 4 are detachably connected to the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2, respectively, and are used to replace supporting sleeves 4 of different lengths according to the spacing between the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2.

[0046] In this embodiment, the number of the support sleeves 4 is two, and the two support sleeves 4 are symmetrically arranged with respect to the axis of the power shaft mounting hole 3. The support sleeve 4 is connected to the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2 through a height adjustment assembly, and is used to adjust the distance between the support sleeve 4 and the upper blade-flinging assembly 1 and / or the lower blade-flinging assembly 2. Specifically, the height adjustment assembly includes a spring seat 7, a compression spring 8, a connecting bolt 9 and a connecting nut 10. The bottom of the support sleeve 4 is fixedly connected with a support plate 11, and the support plate 11 abuts against the upper surface of the lower blade-flinging assembly 2. The compression spring 8 is arranged in the support sleeve 4, and the bottom end of the compression spring 8 abuts against the support plate 11. The lower part of the spring seat 7 is slidably arranged in the supporting sleeve 4, and the bottom end of the spring seat 7 abuts against the top end of the compression spring 8, and the top end of the spring seat 7 abuts against the lower surface of the upper blade-flinging assembly 1. The screw end of the connecting bolt 9 passes through and extends out of the lower blade-flinging assembly 2, the compression spring 8, the spring seat 7 and the upper blade-flinging assembly 1 in sequence, and is threadedly connected with the connecting nut 10. Since the two ends of the compression spring 8 are always abutted against the spring seat 7 and the supporting plate 11, the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2 are in a separated state under the action of the compression spring 8. By adjusting the connecting nut 10, the distance between the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2 can be adjusted to meet the needs of different stubble heights.

[0047] like Figure 7 As shown, in the present embodiment, the upper blade assembly 1 comprises an upper blade holder 1-1 and a lower blade holder 1-2 which are arranged in parallel up and down, and two upper blades 1-3 which are fixedly clamped between the upper blade holder 1-1 and the lower blade holder 1-2 at one end, the two upper blades 1-3 are symmetrically arranged with respect to the axis of the power shaft mounting hole 3, the two upper blades 1-3 are clamped and fixed by the upper blade holder 1-1 and the lower blade holder 1-2, the upper blade holder 1-1 and the lower blade holder 1-2 are fixedly connected by bolts, specifically, the number of bolts connecting the upper blade holder 1-1 and the lower blade holder 1-2 is two, the two bolts sequentially pass through the upper blade holder 1-1, the upper blade 1-3 and the lower blade holder 1-2 and are then fastened and fixed by nuts, and the installation and disassembly are convenient.

[0048] In the present embodiment, in order to avoid different spacings between the upper top tool holder 1-1 and the lower top tool holder 1-2 due to inaccurate control of the locking force of the bolts and nuts, a limit block 15 is provided between the upper top tool holder 1-1 and the lower top tool holder 1-2. The thickness of the limit block 15 is the same as the thickness of the portion of the upper swing knife 1-3 arranged between the upper top tool holder 1-1 and the lower top tool holder 1-2. In order to facilitate the fixation of the limit block 15, the number of the limit blocks 15 is two, and the two connecting bolts 9 pass through the two limit blocks 15 respectively.

[0049] like Figure 8 As shown, the lower blade assembly 2 includes an upper blade holder 2-1 and a lower blade holder 2-2 which are arranged in parallel up and down, and two lower blades 2-3 which are fixedly clamped between the upper blade holder 2-1 and the lower blade holder 2-2 at one end. The two lower blades 2-3 are symmetrically arranged with respect to the axis of the power shaft mounting hole 3. The two lower blades 2-3 are clamped and fixed by the upper blade holder 2-1 and the lower blade holder 2-2, which facilitates installation and disassembly.

[0050] In this embodiment, the two connecting bolts 9 pass through the lower tool holder 2-2, the lower swing knife 2-3 and the upper tool holder 2-1 respectively, and the lower tool holder 2-2 and the lower tool holder 2-2 are clamped by the supporting sleeve 4 and the bolt head of the connecting bolts 9, and the lower swing knife 2-3 is positioned at the same time.

[0051] Embodiment 3

[0052] like Figure 5 , Figure 6As shown, this embodiment includes an upper blade-flinging assembly 1 and a lower blade-flinging assembly 2 which are spaced apart from each other. A power shaft mounting hole 3 is provided at the top center of the upper blade-flinging assembly 1. A plurality of supporting sleeves 4 are provided between the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2. The supporting sleeves 4 are detachably connected to the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2, respectively, and are used to replace supporting sleeves 4 of different lengths according to the spacing between the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2.

[0053] In this embodiment, the number of the support sleeves 4 is two, and the two support sleeves 4 are symmetrically arranged with respect to the axis of the power shaft mounting hole 3. The support sleeve 4 is connected to the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2 through a height adjustment assembly, and is used to adjust the distance between the support sleeve 4 and the upper blade-flinging assembly 1 and / or the lower blade-flinging assembly 2. Specifically, the height adjustment assembly includes an upper connecting threaded column 12 fixedly connected to the lower surface of the upper blade-flinging assembly 1, and a lower connecting threaded column 13 fixedly connected to the upper surface of the lower blade-flinging assembly 2. The upper connecting threaded column 12 is fixedly connected to the lower surface of the upper blade-flinging assembly 1, and the lower connecting threaded column 13 is fixedly connected to the upper surface of the lower blade-flinging assembly 2. The threaded column 12 and the lower connecting threaded column 13 have opposite thread directions, and the inner wall of the support sleeve 4 is provided with an internal thread, wherein the threaded directions of the internal thread at the upper part and the internal thread at the lower part of the inner wall of the support sleeve 4 are opposite, and respectively match the threads on the upper connecting threaded column 12 and the lower connecting threaded column 13, the upper part of the support sleeve 4 is threadedly connected to the upper connecting threaded column 12, and the lower part of the support sleeve 4 is threadedly connected to the lower connecting threaded column 13, and the axial rotation of the support sleeve 4 drives the upper connecting threaded column 12 and the lower connecting threaded column 13 to move away from or closer to each other. By axially rotating the support sleeve 4, the upper connecting threaded column 12 and the lower connecting threaded column 13 are moved away from or closer to each other, thereby realizing the adjustment of the spacing between the upper blade-flinging assembly 1 and the lower blade-flinging assembly 2, thereby meeting the needs of different stubble heights.

[0054] The upper connecting threaded column 12 is connected to the upper blade-flipping assembly 1 via a mounting bolt 14 , and the lower connecting threaded column 13 is connected to the lower blade-flipping assembly 2 via a mounting bolt 14 .

[0055] like Figure 7As shown, in the present embodiment, the upper blade assembly 1 comprises an upper blade holder 1-1 and a lower blade holder 1-2 which are arranged in parallel up and down, and two upper blades 1-3 which are fixedly clamped between the upper blade holder 1-1 and the lower blade holder 1-2 at one end, the two upper blades 1-3 are symmetrically arranged with respect to the axis of the power shaft mounting hole 3, the two upper blades 1-3 are clamped and fixed by the upper blade holder 1-1 and the lower blade holder 1-2, the upper blade holder 1-1 and the lower blade holder 1-2 are fixedly connected by bolts, specifically, the number of bolts connecting the upper blade holder 1-1 and the lower blade holder 1-2 is two, the two bolts sequentially pass through the upper blade holder 1-1, the upper blade 1-3 and the lower blade holder 1-2 and are then fastened and fixed by nuts, and the installation and disassembly are convenient.

[0056] In this embodiment, in order to avoid different spacings between the upper top tool holder 1-1 and the lower top tool holder 1-2 due to inaccurate control of the locking force of the bolts and nuts, a limit block 15 is provided between the upper top tool holder 1-1 and the lower top tool holder 1-2. The thickness of the limit block 15 is the same as the thickness of the portion of the upper swing knife 1-3 arranged between the upper top tool holder 1-1 and the lower top tool holder 1-2. In order to facilitate the fixation of the limit block 15, the number of the limit blocks 15 is two, and the two mounting bolts 14 pass through the two limit blocks 15 respectively.

[0057] like Figure 8 As shown, the lower blade assembly 2 includes an upper blade holder 2-1 and a lower blade holder 2-2 which are arranged in parallel up and down, and two lower blades 2-3 which are fixedly clamped between the upper blade holder 2-1 and the lower blade holder 2-2 at one end. The two lower blades 2-3 are symmetrically arranged with respect to the axis of the power shaft mounting hole 3. The two lower blades 2-3 are clamped and fixed by the upper blade holder 2-1 and the lower blade holder 2-2, which facilitates installation and disassembly.

[0058] In this embodiment, the two mounting bolts 14 pass through the lower tool holder 2-2, the lower swing knife 2-3 and the upper tool holder 2-1 respectively, and the lower tool holder 2-2 and the lower tool holder 2-2 are clamped by the lower connecting threaded column 13 and the bolt head of the mounting bolts 14, and the lower swing knife 2-3 is positioned at the same time.

[0059] Embodiment 4

[0060] This embodiment discloses a cutting platform, including a cutting platform stem chopping mechanism described in any of the above-mentioned embodiments 1, 2 and 3.

[0061] Embodiment 5

[0062] This embodiment discloses a harvester, including the harvesting table in the fourth embodiment.

[0063] When working, the power input mechanism transmits power to the upper blade-throwing assembly 1. Since the upper blade-throwing assembly 1 and the lower blade-throwing assembly 2 are installed together, the upper blade-throwing assembly 1 and the lower blade-throwing assembly 2 will rotate synchronously, thereby chopping the stems. When encountering high-stem crops, a support sleeve 4 with a relatively large height dimension can be selected, or the spacing between the support sleeve 4 and the upper blade-throwing assembly 1 and / or the lower blade-throwing assembly 2 can be adjusted to increase the gap between the upper blade-throwing assembly 1 and the lower blade-throwing assembly 2, thereby increasing the gap between the upper blade-throwing assembly 1 and the lower blade-throwing assembly 2, and raising the harvesting platform to ensure the ear picking and stem pulling while also meeting the stubble retention requirements and the chopping effect. When encountering low-stem crops, a support sleeve with a relatively small height dimension can be selected, or the spacing between the support sleeve 4 and the upper blade-throwing assembly 1 and / or the lower blade-throwing assembly 2 can be adjusted to reduce the gap between the upper blade-throwing assembly 1 and the lower blade-throwing assembly 2, thereby lowering the harvesting platform to ensure the ear picking and stem pulling while also meeting the stubble retention requirements and the chopping effect.

[0064] The setting of the double-layer blade-flinging assembly can ensure a good stubble height and greatly improve the stem chopping effect; by adjusting the height of the support sleeve 4, different assembly heights of the lower blade-flinging assembly 2 can be achieved to meet different harvesting requirements.

[0065] 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.

[0066] In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] 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.

[0068] 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.

[0069] 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 stem chopping mechanism for a cutting platform, characterized in that: The utility model comprises an upper blade-flickering assembly (1) and a lower blade-flickering assembly (2) which are arranged at an interval up and down, wherein a power shaft mounting hole (3) is provided at the top center of the upper blade-flickering assembly (1), and a plurality of supporting sleeves (4) are provided between the upper blade-flickering assembly (1) and the lower blade-flickering assembly (2), and the supporting sleeves (4) are detachably connected to the upper blade-flickering assembly (1) and the lower blade-flickering assembly (2) respectively, and are used for replacing supporting sleeves (4) of different lengths according to the spacing between the upper blade-flickering assembly (1) and the lower blade-flickering assembly (2).

2. A stem chopping mechanism for a header according to claim 1, characterized in that: There are two support sleeves (4), and the two support sleeves (4) are symmetrically arranged with respect to the axis of the power shaft mounting hole (3). A fixing bolt (5) is arranged in each support sleeve (4), and the head of the fixing bolt (5) is arranged below the lower blade-flinging assembly (2). The screw end of the fixing bolt (5) passes through and extends out of the lower blade-flinging assembly (2), the support sleeve (4) and the upper blade-flinging assembly (1) in sequence, and is then threadedly connected with a fixing nut (6).

3. A stem chopping mechanism for a header according to claim 1, characterized in that: The support sleeve (4) is connected to the upper blade-flicking assembly (1) and the lower blade-flicking assembly (2) via a height adjustment assembly, and is used to adjust the distance between the support sleeve (4) and the upper blade-flicking assembly (1) and / or the lower blade-flicking assembly (2).

4. A stem chopping mechanism for a header according to claim 3, characterized in that: The height adjustment assembly comprises a spring seat (7), a compression spring (8), a connecting bolt (9) and a connecting nut (10); the bottom of the supporting sleeve (4) is fixedly connected with a supporting plate (11), the supporting plate (11) abuts against the upper surface of the lower blade-flipping assembly (2); the compression spring (8) is arranged in the supporting sleeve (4), the bottom end of the compression spring (8) abuts against the supporting plate (11), the lower part of the spring seat (7) is slidably arranged in the supporting sleeve (4), and the bottom end of the spring seat (7) abuts against the top end of the compression spring (8), the top end of the spring seat (7) abuts against the lower surface of the upper blade-flipping assembly (1); the screw end of the connecting bolt (9) passes through and extends out of the lower blade-flipping assembly (2), the compression spring (8), the spring seat (7) and the upper blade-flipping assembly (1) in sequence, and is threadedly connected with the connecting nut (10).

5. A stem chopping mechanism for a header according to claim 3, characterized in that: The height adjustment assembly comprises an upper connecting threaded column (12) fixedly connected to the lower surface of the upper blade-flicking assembly (1), and a lower connecting threaded column (13) fixedly connected to the upper surface of the lower blade-flicking assembly (2); an inner thread is provided on the inner wall of the support sleeve (4); the upper portion of the support sleeve (4) is threadedly connected to the upper connecting threaded column (12); the lower portion of the support sleeve (4) is threadedly connected to the lower connecting threaded column (13); the axial rotation of the support sleeve (4) drives the upper connecting threaded column (12) and the lower connecting threaded column (13) to move away from or closer to each other.

6. A stem chopping mechanism for a header according to claim 5, characterized in that: The upper connecting threaded column (12) is connected to the upper blade-flipping assembly (1) via a mounting bolt (14), and the lower connecting threaded column (13) is connected to the lower blade-flipping assembly (2) via a mounting bolt (14).

7. A stem chopping mechanism for a header according to any one of claims 1 to 6, characterized in that: The upper blade swinging assembly (1) comprises an upper blade holder (1-1) and a lower blade holder (1-2) which are arranged in parallel up and down, and two upper blade swinging knives (1-3) with one end fixedly clamped between the upper blade holder (1-1) and the lower blade holder (1-2), and the two upper blade swinging knives (1-3) are symmetrically arranged about the axis of the power shaft mounting hole (3).

8. A stem chopping mechanism for a header according to any one of claims 1 to 6, characterized in that: The lower blade swinging assembly (2) comprises an upper blade holder (2-1) and a lower blade holder (2-2) which are arranged in parallel up and down, and two lower blade swinging knives (2-3) whose one end is fixedly clamped between the upper blade holder (2-1) and the lower blade holder (2-2), and the two lower blade swinging knives (2-3) are symmetrically arranged about the axis of the power shaft mounting hole (3).

9. A header, characterized in that: It comprises a harvesting platform stalk chopping mechanism as described in any one of claims 1 to 8.

10. A harvester, characterized in that: The invention comprises a header as claimed in claim 9.

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