Harvester transmission system and harvester

Abstract

The harvester transmission system comprises an engine, a main clutch, a first-stage clutch, a second-stage clutch and a header reversing device, and the main clutch is arranged between a first transmission wheel and a second transmission wheel to control power output of the engine; the first-stage clutch device is arranged between the third transmission wheel and the fourth transmission wheel and used for cutting off power transmission between the first transmission shaft and the second transmission shaft. The second-stage clutch device is arranged between the seventh transmission wheel and the eighth transmission wheel and used for controlling power input of the header. And the header reversing device is arranged at the other end of the header driving shaft, when the header is blocked, the secondary clutch device is disconnected from the power of the engine, and the header reversing device drives the header to rotate reversely. According to the harvester transmission system and the harvester, a three-stage clutch arrangement mode is adopted, step-by-step starting of the harvester and independent operation control of the header can be achieved, flameout of an engine can be avoided, and the operation reliability of the harvester is improved.

Description

Technical Field

[0001] The present invention relates to the field of agricultural machinery transmission, in particular to a harvester transmission system and a harvester. Background Art

[0002] During the operation of existing harvesters, when the header is blocked, the load on the entire machine is too large, which can easily cause the harvester to stall, affecting the operating efficiency. A common method is to reverse the header after shutting down to achieve straw feeding and spitting back. However, when using this mode, the entire vehicle needs to be turned off, and the harvester parts other than the header cannot operate normally. There is still unprocessed straw in the cutter conveying channel behind the header feeding inlet. During the header spitting back, the straw remaining in this part cannot be processed in time, and the harvesting efficiency is reduced. At the same time, during the header reversal process, the cutting components can work normally when the header is reversed, which poses a safety hazard and affects the safety of the operation. Therefore, it is necessary to provide a harvester transmission system to overcome the above-mentioned defects. Summary of the Invention

[0003] The purpose of the present invention is to provide a harvester transmission system and a harvester, which can achieve the reversal of the harvesting platform without stopping the engine, solve the problem of the harvester stalling due to excessive load during startup or operation, and improve the operating efficiency and transmission reliability of the harvester.

[0004] According to one aspect of the present invention, there is provided a harvester transmission system comprising:

[0005] an engine, the engine comprising a first transmission wheel;

[0006] a first transmission shaft, the first transmission shaft being arranged along a width direction of the harvester;

[0007] a second transmission wheel, the second transmission wheel being arranged at one end of the first transmission shaft, the second transmission wheel being arranged on the same side as the first transmission wheel and being connected by a belt;

[0008] A main clutch, which is arranged between the first transmission wheel and the second transmission wheel to control the engine power output;

[0009] a third transmission wheel, the third transmission wheel being sleeved on the other side of the first transmission shaft;

[0010] a second transmission shaft, the second transmission shaft being arranged parallel to the first transmission shaft, with a fourth transmission wheel and a fifth transmission wheel respectively sleeved on both ends of the second transmission shaft, the fourth transmission wheel and the third transmission wheel being arranged on the same side and connected by a belt;

[0011] a primary clutch device, the primary clutch device being arranged between the third transmission wheel and the fourth transmission wheel, and being used to cut off the power transmission between the first transmission shaft and the second transmission shaft;

[0012] a third transmission shaft, the third transmission shaft being arranged parallel to the second transmission shaft, a sixth transmission wheel being arranged at one end of the third transmission shaft, the sixth transmission wheel being arranged on the same side as the fifth transmission wheel and being connected by a belt, and a seventh transmission wheel being arranged at the other end of the third transmission shaft;

[0013] A header drive shaft, the header drive shaft being arranged parallel to the front side of the third transmission shaft, an eighth transmission wheel being arranged at one end of the header drive shaft, the eighth transmission wheel being arranged on the same side as the seventh transmission wheel and being connected by a belt;

[0014] A secondary clutch device, the secondary clutch device is arranged between the seventh transmission wheel and the eighth transmission wheel, and the secondary clutch device is used to control the power input of the header;

[0015] The header reversing device is arranged at the other end of the header driving shaft; when the header is blocked, the secondary clutch device disconnects the power connection with the engine, and the header reversing device drives the header to reverse.

[0016] By setting up a multi-stage clutch, when the header is reversed, the header transmission system and the rear-end transmission system of the harvester will not conflict, and the header and the rear-end body of the harvester can operate independently, which can improve the operating efficiency of the harvester and ensure the reliability of the harvester transmission.

[0017] Preferably, the cutting platform reversing device includes a reversing driver and a reversing gear set, and the reversing driver is arranged on the rear side of the cutting platform; the reversing gear set includes a first gear sleeved on the cutting platform driving shaft, and a second gear connected to the reversing driver, the second gear is engaged with the first gear, and the reversing driver drives the second gear to rotate.

[0018] Preferably, the reversing driver includes a reversing transmission shaft and a shift fork mechanism, the second gear is loosely mounted on the reversing transmission shaft, the reversing transmission shaft also includes a first sliding gear, a second sliding gear, and a third sliding gear sequentially mounted on the reversing transmission shaft, the third sliding gear is mounted on a rotating shaft sleeve, and the second gear is mounted on the rotating bearing; the second sliding gear is connected to the shift fork mechanism through a spline gear sleeve.

[0019] Preferably, the header reversing device further includes a third gear and a first reversing output shaft, the first reversing output shaft is arranged parallel to the reversing transmission shaft, the third gear is sleeved on the first reversing output shaft, and the third gear is meshed with the second gear.

[0020] Preferably, a one-way bearing is provided on the other side of the first counter output shaft relative to the third gear, and the one-way bearing is transmission-connected to the cutting knife.

[0021] Preferably, the main clutch includes a main clutch cylinder and a main clutch tensioning device, the first-stage clutch device includes a first clutch cylinder and a first tensioning device, and the second-stage clutch device includes a second clutch cylinder and a second tensioning device; the oil supply line of the first clutch cylinder is longer than that of the main clutch cylinder, and the second clutch cylinder and the first clutch cylinder are supplied with oil through different oil pumps.

[0022] Preferably, the header reversing device includes a fixed shaft horizontally arranged above the reversing transmission shaft, both ends of the fixed shaft are respectively fixed to the side plates, and one end of the fork mechanism is sleeved on the fixed shaft.

[0023] Preferably, the cutting platform transmission shaft includes a gear transmission output shaft and a cutting platform transmission input shaft, the gear transmission output shaft and the cutting platform transmission input shaft are connected through a universal joint, and the gear transmission output shaft is passed through the side plate.

[0024] Preferably, the reversing driver is arranged on one side of the reversing drive shaft, and the reversing driver is a reversing motor or a reversing motor, and the reversing motor is electrically connected to the harvester control system.

[0025] Preferably, a secondary shredding device is further included, which includes a fourth transmission shaft arranged between the second transmission shaft and the third transmission shaft, a shredding transmission gear is provided on one side of the fourth transmission shaft, and the shredding transmission gear is connected to the fourth transmission wheel through a belt.

[0026] The present invention also provides a harvester comprising the harvester transmission system described in any one of the above items.

[0027] The present invention provides a harvester transmission system and a harvester, which have the function of graded starting, can improve the reliability of the harvester transmission system, and through the cooperation of the secondary clutch device and the header reversal device, the header can be reversed without shutting down the whole machine, thereby solving the problem of header blockage, and can improve the operating efficiency of the harvester and ensure operating safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0029] Figure 1 A schematic diagram of the right side transmission of a harvester provided in an embodiment of the present invention.

[0030] Figure 2A schematic diagram of the left side transmission of a harvester provided in an embodiment of the present invention.

[0031] Figure 3 A schematic diagram of a header and reversing device provided in an embodiment of the present invention.

[0032] Figure 4 A schematic structural diagram of a harvester transmission system provided in an embodiment of the present invention.

[0033] Figure 5 A schematic structural diagram of a header reversing device provided in an embodiment of the present invention.

[0034] Figure 6 A schematic cross-sectional view of a counter-rotating transmission shaft provided in an embodiment of the present invention.

[0035] Description of Figure Numbers:

[0036] 100-harvester transmission system; 10-engine; 101-first transmission wheel; 11-main clutch; 111-main clutch cylinder; 112-main clutch tensioning device; 20-first transmission shaft; 201-second transmission wheel; 202-third transmission wheel; 30-second transmission shaft; 301-fourth transmission wheel; 302-fifth transmission wheel; 31-first clutch device; 311-first clutch cylinder; 312-first tensioning device; 40-third transmission shaft; 401-sixth transmission wheel; 402-seventh transmission wheel; 50-heading table driving shaft; 501-eighth transmission wheel; 51-secondary clutch device; 511-second clutch cylinder; 512-second Tensioning device; 52-cutting table transmission input shaft; 53-gear transmission output shaft; 54-universal joint; 60-cutting table reversing device; 61-reversing drive; 62-reversing gear set; 621-first gear; 622-second gear; 623-third gear; 63-reversing transmission shaft; 631-first sliding gear; 632-second sliding gear; 633-third sliding gear; 634-rotating bearing; 635-rotating shaft sleeve; 64-fork mechanism; 641-fixed shaft; 641-spline gear sleeve; 65-first reversing output shaft; 651-one-way bearing; 70-secondary shredding device; 71-fourth transmission shaft; 701-shredding transmission gear. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. As used herein, "one" not only means "only one" but also "more than one."

[0039] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0040] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0041] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other embodiments can be obtained based on these drawings without inventive work.

[0043] See also Figures 1 to 6As shown, in a corn harvester for both ears and stalks, a chopping device is provided on the harvester body, located at the rear side of the header, and connected to the header feed port. The rear end chopping device includes a chopping knife and a blower. After the straw is chopped, it is thrown into the storage space by the blower. An embodiment provides a harvester transmission system that can reliably transmit the power of the engine 10 to the harvester header. The transmission system includes a first transmission wheel 101 provided on the engine 10 and a first transmission shaft 20 provided along the width direction of the harvester. The first transmission shaft 20 transmits the power of the engine 10 to the other side of the harvester. A second transmission wheel 201 is provided at one end of the first transmission shaft 20. The second transmission wheel 201 and the first transmission wheel 101 are connected by a belt and are provided on the same side of the harvester. The main clutch 11 is used to control the power output of the engine 10. The main clutch 11 is provided between the first transmission wheel 101 and the second transmission wheel 201. The output control of the power of the engine 10 is achieved by controlling the tension of the transmission belt. The third transmission wheel 202 is arranged at the other end of the first transmission shaft 20, corresponding to the arrangement position of the second transmission wheel 201 on the first transmission shaft 20 and rotating synchronously. The power of the engine 10 is transmitted to the second transmission wheel 201, driving the second transmission shaft 30 to rotate and transmit power to the third transmission wheel 202. The second transmission shaft 30 is arranged horizontally with the first transmission shaft 20. With the working direction of the harvester as the front, the second transmission shaft 30 is located in front of the first transmission shaft 20. The two ends of the second transmission shaft 30 are respectively provided with a fourth transmission wheel 301 and a fifth transmission wheel 302 that rotate synchronously with the second transmission shaft 30. The fourth transmission wheel 301 and the third transmission wheel 202 are arranged on the same side and are connected by a belt to achieve transmission. A primary clutch device 31 is provided between the third transmission wheel 202 and the fourth transmission wheel 301 to cut off the power transmission between the first transmission shaft 20 and the second transmission shaft 30. In a specific embodiment, the second transmission shaft 30 is a fan shaft, and the fan impeller is arranged circumferentially around the second transmission shaft 30. The function of this fan is to throw straw from the conveying channel on the rear side of the cutting table into a preset storage space. The third transmission shaft 40 is arranged parallel to the second transmission shaft 30 and is located in front of the second transmission shaft 30. A sixth transmission wheel 401 is provided at one end of the third transmission shaft 40. The sixth transmission wheel 401 is arranged on the same side as the fifth transmission wheel 302 and is connected by a belt. The seventh transmission wheel 402 is provided at the other end of the third transmission shaft 40. The sixth transmission wheel 401, the seventh transmission wheel 402, and the third transmission shaft 40 rotate synchronously. The cutting table drive shaft 50 that transmits power to the cutting table is arranged in front of the third transmission shaft 40. An eighth transmission wheel 501 is provided at one end of the cutting table drive shaft 50. The eighth transmission wheel 501 is arranged on the same side as the seventh transmission wheel 402 and is connected by a belt. Power is transmitted from the seventh transmission wheel 402 to the eighth transmission wheel 501, driving the cutting table operation. The secondary clutch device 51 is provided between the seventh transmission wheel 402 and the eighth transmission wheel 501 and is used to control the power transmission between the engine 10 and the header.The other end of the header driving shaft 50 is also provided with a header reversing device 60. In this embodiment, when the header is blocked, the secondary clutch device 51 cuts off the power connection between the header driving shaft 50 and the engine 10, and the header reversing device 60 drives the header to reverse, without affecting the operation of the components on the harvester body. Specifically, when the header of the harvester is blocked, due to the heavy load, the fuel consumption of the harvester is high or the engine 10 is directly shut down, it is necessary to perform the header reversing operation, that is, to spit out the straw originally fed by reversing the header to avoid more serious blockage. At this time, it is only necessary to cut off the secondary clutch device 51, and the header reversing device 60 drives the header driving shaft 50 to reverse, so that the header can be reversed without affecting the normal operation of the rear end body of the harvester.

[0044] In a preferred embodiment, the header drive shaft includes a gear output shaft 53 and a header drive output shaft. The gear output shaft 53 and the header drive input shaft 52 are connected by a universal joint 54. The gear output shaft 53 is disposed on the side plate. The configuration of the universal joint 54 prevents damage to the header drive shaft and failure of the header drive system when the harvester is overloaded, thereby reducing torque.

[0045] In a specific embodiment, the main clutch 11 is provided with a main clutch cylinder 111 and a main clutch tensioning device 112, the first-stage clutch device 31 includes a first clutch cylinder 311 and a first tensioning device 312, and the second-stage clutch device 51 includes a second clutch cylinder 511 and a second tensioning device 512, wherein the oil supply line of the first clutch cylinder 311 is longer than that of the main clutch cylinder 111, and the first clutch cylinder 311 and the main clutch cylinder 111 are synchronously driven by the harvester control system. Since the oil supply line of the first clutch cylinder 311 is longer than that of the main clutch cylinder 111, during the startup of the engine 10, the main clutch cylinder 111 is actuated first, and the main clutch tensioning device 112 is the first to tension the belt for power output. Since the oil supply line of the first clutch cylinder 311 is shorter than that of the main clutch cylinder 111 during the starting process of the engine 10, the action time of the first clutch cylinder 311 is slower than that of the main clutch cylinder 11. At the moment when the main clutch tensioning device 112 tightens the belt to transmit power for starting the engine 10, the oil supply line of the first clutch cylinder 311 is longer and has not yet acted, so the first tensioning device 312 is not driven. At this time, power has not been connected to the second transmission shaft 30, so the load pressure of the whole machine is small, which can avoid startup stalling. The second clutch cylinder 511, the main clutch cylinder 111 and the first clutch cylinder 311 are supplied with oil from different oil pumps. The second clutch cylinder 511 can be controlled independently. The second clutch cylinder 511 controls the second tensioning device 512 to tighten the belt to ensure the independence of the header transmission. During the reversal of the header, it can be cut off separately without affecting the function of the rear end body of the harvester. Therefore, the straw in the rear end chopping channel can be processed in time, which can improve the operating efficiency of the harvester and there is no need to stop the machine for processing when the header is blocked.

[0046] The header reversing device 60 includes a reversing driver 61 and a reversing gear set 62. The reversing driver 61 is disposed at the rear side of the header and is in transmission connection with the header drive shaft 50. In a specific embodiment, the reversing driver 61 is a reversing motor or a reversing motor, and the form of the reversing motor or the reversing motor is not limited herein. The reversing gear set 62 performs power transmission or reversing functions on the header. Specifically, the reversing gear set 62 includes a first gear 621 mounted on the header drive shaft 50 and a second gear 622 in transmission connection with the reversing driver 61. The second gear 622 meshes with the first gear 621. When the reversing driver 61 is in operation, it drives the second gear 622 to rotate. The second gear 622 rotates in the opposite direction to the first gear 621. The reversing driver 61 is also provided with a reversing transmission shaft 63 and a fork mechanism 64. The second gear 622 is loosely sleeved on the reversing transmission shaft 63. The reversing transmission shaft 63 is sequentially sleeved with a first sliding gear 631, a second sliding gear 632 and a third sliding gear 633. The third sliding gear 633 is sleeved on a rotating shaft sleeve 635. The second gear 622 is sleeved on a rotating bearing 634. The second sliding gear 632 is connected to the fork mechanism 64 through a spline gear sleeve 641. When the reverse drive 61 is not operating, the second gear 622 idles on the reverse drive shaft 63. At this point, the second gear 622 serves only to transmit power. When the reverse drive 61 is operating, the shift fork mechanism 64 slides on the reverse drive shaft 63, whereupon the splined gear sleeve 641 engages internally with the second and third sliding gears 632 and 633 to achieve a transmission connection. The third sliding gear 633 is integrally formed with the second gear 622, and the second and third sliding gears 632 and 633 rotate synchronously. When the reverse drive 61 drives the reverse drive shaft 63 to rotate, the second gear 622 rotates synchronously with the reverse drive shaft 63, thereby rotating the first gear 621 meshing with the second gear 622, further driving the header to reverse. The header reversing device 60 also includes a fixed shaft 641 horizontally disposed above the header drive shaft 50. The fixed shaft 641 has two ends disposed on the side plates. One end of the shift fork mechanism 64 is sleeved on the fixed shaft 641 and slides on the fixed shaft 641.

[0047] In a preferred embodiment, the reverse drive 61 further includes a third gear 623 and a first reverse output shaft 65. The first reverse output shaft 65 is arranged parallel to the reverse drive shaft 63. The third gear 623 is sleeved on the first reverse output shaft 65 and meshes with the second gear 622. The third gear 623 rotates in the same direction as the first gear 621. A one-way bearing 651 is located on the other side of the first reverse output shaft 65 relative to the third gear 623. The one-way bearing 651 is in transmission connection with the cutting blade. When the reverse drive 61 drives the third gear 623 to rotate, the one-way bearing 651 remains stationary, thereby stopping the cutting blade, thereby preventing safety hazards caused by continued cutting operation.

[0048] The harvester transmission system is also provided with a secondary chopping device 70, which makes the particle size of the straw higher. The secondary chopping device 70 includes a fourth transmission shaft 71 arranged between the second transmission shaft 30 and the third transmission shaft 40. A chopping transmission gear 701 is set on one side of the fourth transmission shaft 71. The chopping transmission gear 701 is arranged on the same side as the fourth transmission wheel 301 and is connected by a belt, so that the first clutch device can also control the operation of the secondary chopping device 70.

[0049] In a specific embodiment, a reversing motor is disposed at one end of a reversing drive shaft 63. The reversing motor or reversing motor is electrically connected to the harvester control system. When the harvester control system detects a blockage in the header, the second clutch device disconnects the power transmission between the header and the engine 10. The harvester control system sends a signal to the reversing motor to start the reversing motor. The signal also drives the shift fork mechanism 64 to slide on the reversing drive shaft 63, causing the third sliding gear 633 integrally provided with the second gear 622 to be connected to the second sliding gear 632 via a spline gear sleeve 641. The third gear 623 is driven synchronously with the reversing drive shaft 63. When a reversing motor is used, an electrical signal drives the solenoid valve to open, supplying oil to the reversing motor, thereby achieving reversal of the header.

[0050] The harvester transmission system provided by the present invention can not only avoid the situation where the engine 10 stalls during startup by setting a multi-stage clutch, but also realize the reversal of the harvester without shutting down the entire harvester for maintenance when the harvester is blocked and the load is too large. It can improve the working efficiency of the harvester, improve the transmission reliability of the harvester, and realize safe operation.

[0051] It will be apparent to those skilled in the art that various modifications and variations may be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. A harvester transmission system, characterized in that: include: an engine, the engine comprising a first transmission wheel; a first transmission shaft, the first transmission shaft being arranged along a width direction of the harvester; a second transmission wheel, the second transmission wheel being arranged at one end of the first transmission shaft, the second transmission wheel being arranged on the same side as the first transmission wheel and being connected by a belt; A main clutch, which is arranged between the first transmission wheel and the second transmission wheel to control the engine power output; a third transmission wheel, the third transmission wheel being sleeved on the other side of the first transmission shaft; a second transmission shaft, the second transmission shaft being arranged parallel to the first transmission shaft, with a fourth transmission wheel and a fifth transmission wheel respectively sleeved on both ends of the second transmission shaft, the fourth transmission wheel and the third transmission wheel being arranged on the same side and connected by a belt; a primary clutch device, the primary clutch device being arranged between the third transmission wheel and the fourth transmission wheel, and being used to cut off the power transmission between the first transmission shaft and the second transmission shaft; a third transmission shaft, the third transmission shaft being arranged parallel to the second transmission shaft, a sixth transmission wheel being arranged at one end of the third transmission shaft, the sixth transmission wheel being arranged on the same side as the fifth transmission wheel and being connected by a belt, and a seventh transmission wheel being arranged at the other end of the third transmission shaft; A header drive shaft, the header drive shaft being arranged parallel to the front side of the third transmission shaft, an eighth transmission wheel being arranged at one end of the header drive shaft, the eighth transmission wheel being arranged on the same side as the seventh transmission wheel and being connected by a belt; A secondary clutch device, the secondary clutch device is arranged between the seventh transmission wheel and the eighth transmission wheel, and the secondary clutch device is used to control the power input of the header; The header reversing device is arranged at the other end of the header driving shaft; when the header is blocked, the secondary clutch device disconnects the power connection with the engine, and the header reversing device drives the header to reverse.

2. A harvester transmission system according to claim 1, characterized in that: The cutting platform reversing device includes a reversing driver and a reversing gear set, wherein the reversing driver is arranged at the rear side of the cutting platform; the reversing gear set includes a first gear sleeved on the driving shaft of the cutting platform, a second gear connected to the reversing driver, the second gear is engaged with the first gear, and the reversing driver drives the second gear to rotate.

3. A harvester transmission system according to claim 2, characterized in that: The reversing driver includes a reversing transmission shaft and a shift fork mechanism, the second gear is loosely sleeved on the reversing transmission shaft, the reversing transmission shaft also includes a first sliding gear, a second sliding gear, and a third sliding gear sequentially sleeved on the reversing transmission shaft, the third sliding gear is sleeved on a rotating shaft sleeve, and the second gear is sleeved on a rotating bearing; the second sliding gear is connected to the shift fork mechanism through a spline gear sleeve.

4. A harvester transmission system according to claim 3, characterized in that: The header reversing device further includes a third gear and a first reversing output shaft. The first reversing output shaft is arranged in parallel with the reversing transmission shaft. The third gear is sleeved on the first reversing output shaft, and the third gear is meshed with the second gear.

5. A harvester transmission system according to claim 4, characterized in that: A one-way bearing is provided on the other side of the first counter-rotating output shaft relative to the third gear, and the one-way bearing is transmission-connected to the cutting knife.

6. A harvester transmission system according to claim 5, characterized in that: The main clutch includes a main clutch cylinder and a main clutch tensioning device, the first-level clutch device includes a first clutch cylinder and a first tensioning device, and the second-level clutch device includes a second clutch cylinder and a second tensioning device; the oil supply line of the first clutch cylinder is longer than that of the main clutch cylinder, and the second clutch cylinder and the first clutch cylinder are supplied with oil through different oil pumps.

7. A harvester transmission system according to claim 6, characterized in that: The header reversing device includes a fixed shaft horizontally arranged above the reversing transmission shaft, two ends of the fixed shaft are respectively fixed to the side plates, and one end of the fork mechanism is sleeved on the fixed shaft.

8. A harvester transmission system according to claim 7, characterized in that: The cutting platform transmission shaft includes a gear transmission output shaft and a cutting platform transmission input shaft, the gear transmission output shaft and the cutting platform transmission input shaft are connected through a universal joint, and the gear transmission output shaft is passed through the side plate.

9. A harvester transmission system according to claim 8, characterized in that: The reversing driver is arranged on one side of the reversing drive shaft. The reversing driver is a reversing motor or a reversing motor. The reversing motor is electrically connected to the harvester control system.

10. The harvester transmission system according to claim 1, wherein: It also includes a secondary shredding device, which includes a fourth transmission shaft arranged between the second transmission shaft and the third transmission shaft, a shredding transmission gear is arranged on one side of the fourth transmission shaft, and the shredding transmission gear is connected to the fourth transmission wheel through a belt.

11. A harvester, characterized in that: The invention comprises a harvester transmission system according to any one of claims 1 to 10.

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