A quick change device for a multi-crop combine header

Abstract

The application provides a quick replacement device of a multi-crop crawler-type combine harvester header, and relates to the technical field of combine harvester headers. The quick replacement device of the multi-crop crawler-type combine harvester header is arranged between a combine harvester body and a header, and comprises a first calibration mechanism. The first calibration mechanism comprises a front end buffer assembly, left-right alignment oil cylinders and baffles. The connecting part is displaced towards the feeding port. Flexible contact is formed between the connecting part and the header through elastic deformation of the front end buffer assembly. As the connecting part gradually abuts towards the feeding port, the left-right alignment oil cylinders are gradually displaced into the coverage range of the baffles. Through synchronous elongation of the left-right alignment oil cylinders and abutting towards the corresponding baffles, respectively, displacement of the header and the frame in the width direction of the header is caused, and the header is forced to displace to align the feeding port and the connecting part left and right.

Description

Technical Field

[0001] This application relates to the field of harvester header technology, and more specifically, to a quick-change device for the header of a multi-crop tracked combine harvester. Background Technology

[0002] In the existing technology, when the harvester and the header are docked, the header is placed in a certain place, and the harvester adjusts its own angle to align its position with the docking position of the header, and then the two are docked. However, this process requires a high level of control skills from the driver, and the docking point must not be misaligned, otherwise the two will not be able to connect. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a quick-change device for the header of a multi-crop tracked combine harvester, disposed between the harvester body and the header. The header is placed on a frame, and wheels are provided at the bottom of the frame to allow the frame to move along the width direction of the header. A connecting part with a vertically adjustable angle is provided at the front end of the harvester body. A feeding port is provided on the header, and the connecting part engages with the feeding port. The device includes a first calibration mechanism, comprising front-end buffer components symmetrically arranged on both sides of the connecting part, left and right alignment cylinders symmetrically arranged on both sides of the connecting part, and baffles symmetrically fixed to the side of the header facing the connecting part. The front-end buffer components elastically abut against the header and are located on both sides of the feeding port. The left and right alignment cylinders abut against the baffles located on one side of themselves through their own extension and retraction. The harvester body moves the front end of the connecting part toward the feed port through its own displacement. During this displacement, the front buffer assembly abuts against the cutting table. The elastic deformation of the front buffer assembly forms a flexible contact between the connecting part and the cutting table. As the connecting part gradually abuts against the feed port, the left and right alignment cylinders gradually move into the coverage area of ​​the baffles. Through the synchronous extension of the left and right alignment cylinders and their abutments against the corresponding baffles, the cutting table and the frame will be displaced along the width direction of the cutting table, and the cutting table will be forced to align the feed port and the connecting part left and right through its own displacement.

[0004] Preferably, the front-end buffer assembly includes a fixed plate, an elastic element, and a movable plate. The fixed plate is fixed to the side wall of the connecting part, the fixed end of the elastic element is fixed to the fixed plate, the displacement end of the elastic element passes through the fixed plate, and the movable plate is slidably connected to the side wall of the connecting part and fixed to the displacement end of the elastic element.

[0005] Preferably, the movable plate and the fixed plate have the same shape and size, and the shape of the movable plate is adapted to the shape of the cutting table facing the connecting part.

[0006] Preferably, at least two sets of elastic elements are provided, and the elastic elements will not cause the movable plate to detach from the connecting part when they extend.

[0007] Preferably, the fixed end of the elastic element is a fixed cylinder, the displacement end of the elastic element is a telescopic rod, the telescopic rod is slidably inserted into the fixed cylinder, and the end of the telescopic rod away from the fixed cylinder is fixed to the movable plate.

[0008] Preferably, a first spring is provided inside the fixed cylinder, with the two ends of the first spring abutting against the inner bottom of the fixed cylinder and the end of the telescopic rod, respectively.

[0009] Preferably, the fixing plate is provided with a fixing skirt and a concave skirt on the side facing the connecting part. The fixing skirt and the concave skirt are fixedly connected and are arranged in a stepped shape. The fixing skirt is fixed to the side wall of the connecting part, and the concave skirt is fixed to the fixing plate. A gap is left between the concave skirt and the side wall of the connecting part.

[0010] Preferably, one side of the movable plate is provided with an insert skirt, the insert skirt and the side wall of the connecting part are slidably connected in a sealing manner, and the insert skirt is slidably inserted into the gap between the concave skirt and the connecting part.

[0011] Preferably, the left and right alignment cylinders are arranged along the width direction of the cutting table.

[0012] Preferably, the two baffles are located outside the two left-right aligned hydraulic cylinders.

[0013] The beneficial effects of this invention are: 1. By utilizing the contact between the front-end buffer assembly and the cutting table to form elastic deformation, the original rigid collision between the connecting part and the cutting table is transformed into a flexible contact, thus avoiding damage between the connecting part and the cutting table; 2. By using the synchronous extension and change of the left and right alignment cylinders, and abutting against the corresponding baffles, the cutting table and the support are moved synchronously in the width direction, and the connection part and the feeding port are aligned left and right. 3. By utilizing the contact between the front-end buffer assembly and the left and right alignment cylinders and baffles, the alignment difficulty between the connecting part and the feeding port is reduced, thus reducing the difficulty of operation for the driver.

[0014] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of a multi-crop tracked combine harvester and header according to an embodiment of this application; Figure 2 This is a structural schematic diagram of a quick-change device for the header of a multi-crop tracked combine harvester according to an embodiment of this application; Figure 3 This is a partial structural schematic diagram of a quick-change device for the header of a multi-crop tracked combine harvester according to an embodiment of this application; Figure 4 According to the embodiments of this application Figure 3 Enlarged view of A in the middle; Figure 5 This is a partial structural diagram of the front-end buffer component according to an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the second alignment mechanism according to an embodiment of this application; Figure 7 According to the embodiments of this application Figure 6 Enlarged view of B in the middle; Figure 8 This is a cross-sectional view of the positioning component according to an embodiment of this application; Figure 9 This is a schematic diagram of the sealing buffer mechanism according to an embodiment of this application. Figure 1 ; Figure 10 This is a schematic diagram of the sealing buffer mechanism according to an embodiment of this application. Figure 2 ; Figure 11 This is a partial structural schematic diagram of the sealing buffer mechanism according to an embodiment of this application; Figure 12 According to the embodiments of this application Figure 10 Enlarged view of C in the middle; Figure 13 This is a partial exploded view of the sealing buffer mechanism according to an embodiment of this application.

[0017] Icons: 1. Harvester body; 11. Connecting part; 2. Cutting table; 21. Feed port; 3. First calibration mechanism; 31. Front buffer assembly; 311. Fixing plate; 312. Fixing cylinder; 313. Movable plate; 314. Telescopic rod; 315. First spring; 316. Fixed skirt; 317. Concave skirt; 318. Insert skirt; 32. Left and right alignment cylinder; 33. Baffle; 4. Second alignment mechanism; 41. Abutment plate; 411. Protrusion; 412. First inclined part; 413. Positioning hole; 42. Angle alignment cylinder ; 43. Positioning component; 431. Fixed column; 432. Slide cylinder; 433. Second spring; 434. Limiting plate; 435. Limiting strip; 436. Second inclined section; 5. Sealing buffer mechanism; 51. Abutting component; 511. Side strip; 512. Support strip; 513. Flexible strip; 514. First guide rod; 52. Elastic component; 521. Displacement plate; 522. Insert rod; 523. Third spring; 53. Adjusting component; 531. Adjusting plate; 532. Adjusting bolt; 533. Second guide rod; 534. Strip hole. Detailed Implementation

[0018] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] Example 1, as Figures 1-5 As shown, a quick-change device for the header of a multi-crop tracked combine harvester according to an embodiment of this application is disposed between the harvester body 1 and the header 2. It should be noted that the header 2 can be placed on the frame when not in use. Wheels are provided at the bottom of the frame, allowing the frame to move along the width direction of the header 2 (the frame and the wheels below it are not shown in the figure, but are only used to support the header 2; wheeled frames are common in the prior art and will not be described further here). The front end of the harvester body 1 is provided with a connecting part 11 that can change its vertical angle, such as... Figures 1-3 As shown, the connecting part 11 is rotatably connected to the front end of the harvester body 1, and a hydraulic cylinder is provided below it. One end of the hydraulic cylinder is hinged to the harvester body 1 and the other end is hinged to the lower part of the connecting part 11. Therefore, it can be understood that the hydraulic cylinder can drive the connecting part 11 to change its angle in the vertical direction on the harvester body 1 by extending and retracting (existing technology, which will not be described in detail here).

[0021] It should be noted that the cutting table 2 is provided with a feeding port 21, and the connecting part 11 is connected to the feeding port 21.

[0022] Specifically, the quick-change device of this application includes a first calibration mechanism 3. The first calibration mechanism 3 includes a front buffer assembly 31 symmetrically arranged on both sides of the connecting part 11, left and right alignment cylinders 32 symmetrically arranged on both sides of the connecting part 11, and a baffle 33 symmetrically fixed to the side of the cutting table 2 facing the connecting part 11. The front buffer assembly 31 and the cutting table 2 elastically abut against each other and are located on both sides of the feeding port 21. The left and right alignment cylinders 32 abut against the baffle 33 located on their own side by their own extension and retraction.

[0023] The front-end buffer assembly 31 includes a fixed plate 311, an elastic element, and a movable plate 313. The fixed plate 311 is fixed to the side wall of the connecting part 11. The fixed end of the elastic element is fixed to the fixed plate 311, and the displacement end of the elastic element passes through the fixed plate 311. The movable plate 313 is slidably connected to the side wall of the connecting part 11 and fixed to the displacement end of the elastic element.

[0024] It should be noted that a sealed sliding design is adopted between the movable plate 313 and the side wall of the connecting part 11 to prevent the crop from getting stuck between the movable plate 313 and the side wall of the connecting part 11 during the process of entering the connecting part 11.

[0025] In a specific embodiment of this application, the movable plate 313 and the fixed plate 311 have the same shape and size, and the shape of the movable plate 313 is adapted to the shape of the cutting table 2 facing the connecting part 11. Thus, it can be understood that when the movable plate 313 and the cutting table 2 are fully in contact, gaps can be avoided between them, thereby preventing crops from jumping out of the gaps.

[0026] It should be noted that at least two sets of elastic elements are provided to enhance the stability between the movable plate 313 and the fixed plate 311, and the elastic elements will not cause the movable plate 313 to detach from the connecting part 11 when it extends.

[0027] In a specific embodiment of this application, the fixed end of the elastic element is a fixed cylinder 312, the displacement end of the elastic element is a telescopic rod 314, the telescopic rod 314 is slidably inserted into the fixed cylinder 312, and the end of the telescopic rod 314 away from the fixed cylinder 312 is fixedly connected to the movable plate 313.

[0028] The fixed cylinder 312 is provided with a first spring 315, and the two ends of the first spring 315 abut against the inner bottom of the fixed cylinder 312 and the end of the telescopic rod 314, respectively.

[0029] Furthermore, the fixing plate 311 is provided with a fixing skirt 316 and a concave skirt 317 on the side facing the connecting part 11. The fixing skirt 316 and the concave skirt 317 are fixedly connected and are arranged in a stepped shape. The fixing skirt 316 is fixedly connected to the side wall of the connecting part 11, and the concave skirt 317 is fixedly connected to the fixing plate 311. A gap is left between the concave skirt 317 and the side wall of the connecting part 11.

[0030] The movable plate 313 has a plug-in skirt 318 on one side. The plug-in skirt 318 and the side wall of the connecting part 11 are slidably connected and sealed. The plug-in skirt 318 is slidably inserted into the gap between the concave skirt 317 and the connecting part 11.

[0031] It should be noted that the left and right alignment cylinders 32 are arranged along the width direction of the cutting table 2, and the two baffles 33 are located outside the two left and right alignment cylinders 32.

[0032] The following describes the usage of a quick-change device for the header of a multi-crop tracked combine harvester according to an embodiment of this application, with reference to the accompanying drawings: The harvester body 1 moves its own displacement to move the front end of the connecting part 11 toward the feed port 21. During the displacement process, the harvester body 1 can first adjust the height of the connecting part 11 by the hydraulic cylinder between itself and the connecting part 11, so that the top of the connecting part 11 is lower than the top of the header 2. Then, the two front buffer components 31 on both sides are positioned inside the two baffles 33. Then, during the gradual displacement process, either one of the two front buffer components 31 will first touch the header 2 (there is an angular deviation between the harvester body 1 and the header 2) or both will touch the header 2 (the angle between the harvester body 1 and the header 2 is right angle), regardless of whether there is an angular deviation (when the two are right angled, there is no deviation). (Poor) After the front buffer assembly 31 comes into contact with the header 2, the movable plate 313 on it will retract towards the fixed plate 311 under pressure, and drive the telescopic rod 314 to insert into the fixed cylinder 312, so that the first spring 315 is in a compressed state, and the insert skirt 318 will insert between the inwardly concave skirt 317 and the side wall of the connecting part 11. During this process, under the elastic force of the first spring 315, the movable plate 313 and the header 2 will form a flexible contact, avoiding the rigid collision between the connecting part 11 and the header 2 caused by the movement of the harvester body 1. Furthermore, during the retraction action of the movable plate 313, the two left and right aligned hydraulic cylinders located on both sides of the connecting part 11 will... The cylinder 32 will gradually move into the coverage area of ​​the two baffles 33. If the left and right alignment cylinders 32 do not enter the coverage area of ​​the corresponding baffles 33, that is, the extension of the left and right alignment cylinders 32 cannot reach the baffle 33 on the corresponding side, the operator can correct the angle by adjusting the direction of the harvester body 1. After both left and right alignment cylinders 32 have entered the coverage area of ​​the corresponding baffles 33, the two left and right alignment cylinders 32 will extend synchronously. During this process, one left and right alignment cylinder 32 will first reach the corresponding baffle 33. This will cause the header 2 and the wheeled frame below to move to that side until the other left and right alignment cylinder 32 also reaches the baffle 33 on the corresponding side. At this time, The header 2 and the connecting part 11 will be aligned left and right. Then, the operator moves the harvester body 1 forward to align the connecting part 11 and the feed port 21. Then, by adjusting the height, the connecting part 11 and the feed port 21 can be fully connected. At this time, the header 2 and the connecting part 11 can be fixed by bolts or other methods in the prior art, which can realize the quick replacement of the header 2. Compared with the prior art, this design of the present application reduces the difficulty of operation for the operator by having the harvester body 1 directly connect and fix with the header 2. Moreover, the use of flexible contact during the connection process also reduces the probability of the machine being damaged by rigid collision.

[0033] In related technologies, the quick-change device for the header of a multi-crop tracked combine harvester requires that the harvester body 1 and the header 2 be aligned left and right during the docking process. In actual operation, the harvester body 1 and the header 2 must form a right angle. Precise control of the angle will bring great technical challenges to the driver and will also increase the time required to install the header 2 onto the harvester body 1.

[0034] Example 2, according to some embodiments of this application, such as Figures 6-8 As shown, a second alignment mechanism 4 is also provided on the connecting part 11 and the cutting table 2. The second alignment mechanism 4 includes an abutment plate 41 fixed to the edge of the cutting table 2 along the width direction, angle alignment cylinders 42 symmetrically fixed to the top of the connecting part 11, and a positioning component 43 fixed to the top of the connecting part 11. The positioning component 43 is located between the two angle alignment cylinders 42. The positioning component 43 and the abutment plate 41 form an elastic insertion relationship through the elastic deformation of the front buffer component 31 and the displacement formed by the left and right alignment cylinders 32 abutting against the baffle 33.

[0035] The abutment plate 41 is composed of a horizontal plate and a vertical plate fixed together. The horizontal plate of the abutment plate 41 is provided with an outward protrusion 411 at the center above the feeding port 21. The bottom end of the protrusion 411 is provided with a first inclined part 412. The center of the protrusion 411 is provided with a positioning hole 413 along the vertical direction.

[0036] Specifically, the fixed end of the angle alignment cylinder 42 is fixed to the connecting part 11, and the displacement end of the angle alignment cylinder 42 abuts against the vertical plate of the abutment plate 41 through elongation.

[0037] Furthermore, the positioning component 43 includes a fixed post 431 fixed to the top of the connecting part 11, a sliding cylinder 432 slidably sleeved on the fixed post 431, and a second spring 433 axially arranged inside the sliding cylinder 432, with the two ends of the second spring 433 abutting against the fixed post 431 and the inner wall of the sliding cylinder 432 respectively.

[0038] Furthermore, one end of the fixed column 431 inserted into the slide cylinder 432 is coaxially fixed to a limiting plate 434. Two limiting strips 435 are symmetrically arranged on the inner wall of the slide cylinder 432. The limiting plate 434 is engaged with the limiting strips 435 and the two slide together.

[0039] It should be noted that the top of the slide 432 is provided with a second inclined surface 436, which is wedge-shaped with the first inclined surface 412.

[0040] Therefore, in actual use, as the driver moves the harvester body 1 and the connecting part 11 gradually approaches the feeding port 21 of the header 2, the positioning component 43 gradually approaches the positioning hole 413. During this approach, the sliding cylinder 432 is pressed down by the first inclined surface 412, compressing the second spring 433. Combined with the abutting action of the two left and right alignment cylinders 32 and the corresponding baffles 33, the sliding cylinder 432 gradually moves to the positioning hole 413 until the sliding cylinder 432 and the positioning hole 413 are completely aligned. At this point, the sliding cylinder 432 loses the compressing force and, under the restoring action of the second spring 433 inside, inserts into the positioning hole 413. At this time, the positioning component 43 and the positioning hole 413 are aligned. The cutting platform 2 and the connecting part 11 are rotated together, and at this time, the cutting platform 2 and the connecting part 11 are aligned left and right. Then, the operator controls the two angle alignment cylinders 42 to extend synchronously and abut against the cutting platform 2, so that the cutting platform 2 and the connecting part 11 form a right angle. At this time, the height between the cutting platform 2 and the connecting part 11 is adjusted, and the cutting platform 2 and the connecting part 11 can be quickly connected. Finally, the two are fixed with bolts. This design can help the operator quickly correct the angle between the cutting platform 2 and the connecting part 11. With the left and right alignment cylinders 32 mentioned above, the installation of the cutting platform 2 can be quickly realized, further reducing the operator's operating difficulty and increasing the installation speed of the cutting platform 2.

[0041] In related technologies, a quick-change device for the header of a multi-crop tracked combine harvester is provided. Because a movable plate 313 is provided between the header 2 and the connecting part 11 to avoid rigid collision, a gap will be generated between the two during use. The existence of this gap will cause the harvested crops to fall or get stuck at this point, affecting the actual harvesting effect.

[0042] Example 3, according to some embodiments of this application, such as Figures 9-13 As shown, a sealing buffer mechanism 5 is provided on the movable plate 313. After the movable plate 313 abuts against the cutting table 2, a sealing contact is formed between the sealing buffer mechanism 5 and the cutting table 2. The sealing buffer mechanism 5 includes a plurality of evenly distributed abutting components 51, a plurality of elastic components 52 corresponding to the abutting components 51, and an adjusting component 53 for adjusting the plurality of elastic components 52. The shape of the side view of the abutting components 51, elastic components 52 and adjusting component 53 is adapted to the shape of the side view of the movable plate 313 to minimize the existence of gaps.

[0043] The abutment component 51 includes two side strips 511 symmetrically fixed to the side of the movable plate 313 facing the cutting table 2. A support strip 512 is slidably arranged between the two side strips 511. A flexible strip 513 is arranged on the side of the support strip 512 away from the movable plate 313. Two side strips 511 extend from the side of the flexible strip 513 facing the cutting table 2. A plurality of first guide rods 514 are fixed to the side of the support strip 512 facing the movable plate 313. The plurality of first guide rods 514 slide through the movable plate 313.

[0044] It should be noted that the flexible strip 513 can be a sealing strip or the like in the prior art, only to form a flexible contact with the cutting table 2 and ensure a sealed contact.

[0045] Specifically, the elastic component 52 includes a displacement plate 521, which is fixedly connected to a plurality of first guide rods 514. A plurality of insert rods 522 are fixedly connected to the other side of the displacement plate 521, and a third spring 523 is sleeved on the insert rods 522.

[0046] Furthermore, the adjustment assembly 53 includes an adjustment plate 531, which has a frame structure. Multiple insert rods 522 are slidably inserted into the adjustment plate 531. An adjustment bolt 532 is threadedly connected to one side of the adjustment plate 531. One end of the adjustment bolt 532 is rotatably connected to the movable plate 313. A second guide rod 533 is also slidably inserted into the adjustment plate 531. One end of the second guide rod 533 is fixed to the movable plate 313.

[0047] It should be noted that the adjusting plate 531 is also provided with multiple strip holes 534. The multiple strip holes 534 are used for the corresponding multiple insert rods 522 to slide through the adjusting plate 531, so that when the adjusting plate 531 moves closer to the movable plate 313, the local insert rods 522 on the displacement plate 521 can smoothly form a sliding insertion relationship on the adjusting plate 531 (as shown in the figure, because the side shape is not planar, the height of the upper insert rod 522 and the adjusting plate 531 changes during the displacement process, so the strip holes 534 are designed to adapt to the height change to meet the sliding insertion action).

[0048] Therefore, in practical use, after the cutting platform 2 is installed on the connecting part 11, the adjusting plate 531 is moved towards the displacement plate 521 by rotating the adjusting bolt 532. This will compress the third spring 523. Under the elastic force of the third spring 523, the displacement plate 521 will be forced to move the first guide rod 514 away from the adjusting plate 531. This will cause the support bar 512 to move outward from the side bar 511 and force the flexible bar 513 to move synchronously, so that the flexible bar 513 extends to the outside of the side bar 511. The outside of the flexible bar 513 is actually the cutting platform 2. Therefore, the flexible bar 513 will create a flexible sealing effect with the cutting platform 2. In this way, even if a gap is generated between the cutting platform 2 and the side bar 511 due to machine vibration during actual use, the flexible bar 513 with elastic displacement capability will achieve a flexible sealing effect, ensuring that there is no gap between the cutting platform 2 and the connecting part 11, thereby ensuring the harvesting effect during actual use.

[0049] It should be noted that the specific models and specifications of the harvester body 1, header 2, first spring 315, second spring 433, third spring 523 and adjusting bolt 532 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail.

[0050] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A quick-change device for the header of a multi-crop tracked combine harvester, disposed between the harvester body (1) and the header (2), wherein the header (2) is placed on a frame, and the bottom end of the frame is provided with wheels so that the frame can be moved along the width direction of the header (2), the front end of the harvester body (1) is provided with a connecting part (11) that can change vertical angle, and the header (2) is provided with a feeding port (21), wherein the connecting part (11) engages with the feeding port (21), characterized in that, include: The first calibration mechanism (3) includes a front buffer assembly (31) symmetrically arranged on both sides of the connecting part (11), left and right alignment cylinders (32) symmetrically arranged on both sides of the connecting part (11), and a baffle (33) symmetrically fixed to the side of the cutting table (2) facing the connecting part (11). The front buffer assembly (31) and the cutting table (2) elastically abut against each other and are located on both sides of the feeding port (21). The left and right alignment cylinders (32) abut against the baffle (33) located on one side of themselves through their own extension and retraction. The harvester body (1) moves the front end of the connecting part (11) toward the feed port (21) by its own displacement change. During this displacement process, the front buffer component (31) will abut against the cutting table (2). The elastic deformation of the front buffer component (31) will make the connecting part (11) and the cutting table (2) form a flexible contact. As the connecting part (11) gradually abuts against the feed port (21), the left and right alignment cylinders (32) gradually move into the coverage area of ​​the baffle (33). By the synchronous extension of the left and right alignment cylinders (32) and abutting against the corresponding baffles (33), the cutting table (2) and the frame will move along the width direction of the cutting table (2), and force the cutting table (2) to align the feed port (21) and the connecting part (11) left and right by its own displacement.

2. The quick-change device for the header of a multi-crop tracked combine harvester as described in claim 1, characterized in that, The front-end buffer assembly (31) includes a fixed plate (311), an elastic element, and a movable plate (313). The fixed plate (311) is fixed to the side wall of the connecting part (11). The fixed end of the elastic element is fixed to the fixed plate (311). The displacement end of the elastic element passes through the fixed plate (311). The movable plate (313) is slidably connected to the side wall of the connecting part (11) and fixed to the displacement end of the elastic element.

3. The quick-change device for the header of a multi-crop tracked combine harvester as described in claim 2, characterized in that, The movable plate (313) and the fixed plate (311) have the same shape and size, and the shape of the movable plate (313) is adapted to the shape of the cutting table (2) facing the connecting part (11).

4. The quick-change device for the header of a multi-crop tracked combine harvester as described in claim 2, characterized in that, At least two sets of elastic elements are provided, and the elastic elements will not cause the movable plate (313) to detach from the connecting part (11) when they are extended.

5. A quick-change device for the header of a multi-crop tracked combine harvester as described in claim 2, characterized in that, The fixed end of the elastic element is a fixed cylinder (312), and the displacement end of the elastic element is a telescopic rod (314). The telescopic rod (314) is slidably inserted into the fixed cylinder (312), and the end of the telescopic rod (314) away from the fixed cylinder (312) is fixed to the movable plate (313).

6. The quick-change device for the header of a multi-crop tracked combine harvester as described in claim 5, characterized in that, A first spring (315) is provided inside the fixed cylinder (312), and the two ends of the first spring (315) abut against the inner bottom of the fixed cylinder (312) and the end of the telescopic rod (314), respectively.

7. A quick-change device for the header of a multi-crop tracked combine harvester as described in claim 2, characterized in that, The fixing plate (311) is provided with a fixing skirt (316) and a concave skirt (317) on the side facing the connecting part (11). The fixing skirt (316) and the concave skirt (317) are fixedly connected and are arranged in a stepped shape. The fixing skirt (316) is fixed to the side wall of the connecting part (11), and the concave skirt (317) is fixed to the fixing plate (311). A gap is left between the concave skirt (317) and the side wall of the connecting part (11).

8. The quick-change device for the header of a multi-crop tracked combine harvester as described in claim 7, characterized in that, The movable plate (313) has a plug-in skirt (318) on one side. The plug-in skirt (318) and the side wall of the connecting part (11) are sealed and slidably connected. The plug-in skirt (318) is slidably inserted into the gap between the concave skirt (317) and the connecting part (11).

9. A quick-change device for the header of a multi-crop tracked combine harvester as described in claim 1, characterized in that, The left and right alignment cylinder (32) is arranged along the width direction of the cutting table (2).

10. A quick-change device for the header of a multi-crop tracked combine harvester as described in claim 1, characterized in that, The two baffles (33) are located outside the two left-right aligned cylinders (32).

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