Multi-path power output transmission device for engine matched with combine harvester

Abstract

The invention discloses a multi-path power output transmission device for an engine matched with a combine harvester, which is characterized by comprising a main clutch, a first bevel gear transmission mechanism, a second bevel gear transmission mechanism, a belt pulley transmission mechanism, an output box body, a support bearing and a transmission box cover, the main clutch is arranged at the input end of the device and connected with an output shaft of an engine. The input end of the first bevel gear transmission mechanism is connected with the output end of the main clutch, and the output end is connected with a power input shaft of the hydraulic walking driving pump. The invention relates to the technical field of power output devices of engines of combine harvesters, in particular to a multi-path power output transmission device for a matched engine of a combine harvester, which has the following advantages: 1, the safe and energy-saving design of a main clutch; 2, efficient matching of a bevel gear transmission mechanism; 3, optimizing a straddle type supporting structure; and fourthly, the reliability of the main shaft supporting system is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power output devices of combine harvester engines, and in particular to a multi-channel power output transmission device for a combined harvester engine. Background Art

[0002] The combine harvester needs to simultaneously complete multiple operations such as cutting, conveying, threshing, cleaning, and unloading while moving. Due to differences in speed requirements and scattered layouts, the working parts cannot obtain power directly from the engine. Power distribution must be achieved through a dedicated power output device, and stepless speed change is required for moving and key operation links to optimize the operating effect.

[0003] Currently, advanced international combine harvesters utilize integrated gearbox-based power take-offs (PTOs). Compared to the mainstream decentralized power output solution in my country, which consists of a travel hydraulic drive pump and a working pulley, these solutions offer advantages such as safety, efficiency, ease of maintenance, and environmental reliability. However, these integrated solutions suffer from complex transmission structures, difficult processing, inappropriate speed matching, and poor structural compatibility with domestic models. While the reduction in manufacturing costs for hydraulic continuously variable transmission components in China has driven the replacement of traditional mechanical drives with travel hydraulic drives, decentralized power output still faces technical bottlenecks such as low transmission efficiency and fragmented mechanisms, leading to an increasingly urgent need for integrated power units.

[0004] Given the structural characteristics, processing capabilities, and user cost acceptance of domestic combine harvesters, directly transplanting foreign technical solutions would result in high manufacturing costs and difficulty adapting to the speed and efficiency requirements of existing models. Therefore, developing a power output transmission device that is suitable for the overall layout of domestic combine harvesters, realizes multiple outputs of engine power to the travel and multiple working devices, and is well matched in terms of structure, speed, and efficiency has become a pressing technical challenge. Summary of the Invention

[0005] In view of this, an embodiment of the present invention hopes to provide a multi-way power output transmission device for a combine harvester supporting engine to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the embodiment of the present invention is achieved as follows:

[0007] A multi-way power output transmission device for an engine supporting a combine harvester includes a main clutch for engaging or disengaging power transmission between the device and the engine, a bevel gear transmission mechanism for transmitting power to a hydraulic travel drive pump for powering the combine harvester, a bevel gear transmission mechanism for powering an intermediate drive shaft for powering the combine harvester's threshing device, a pulley transmission mechanism for powering the combine harvester's header, cleaning, grain lifting and other working devices and grain unloading device, an output box body, support bearings for supporting various rotating parts, and a transmission box cover.

[0008] The power output device is used to provide power for the combine harvester to travel and operate. The power from the combine harvester engine is divided into four paths after passing through the main clutch of the power output device and outputted to the combine harvester travel and various operating devices respectively. Among them, a branch path can be connected in series behind the power or pulley transmission mechanism of the hydraulic travel drive pump to transmit the power to the hydraulic pump that provides pressurized hydraulic oil flow to the working components of the hydraulic system of the combine harvester.

[0009] The bevel gear transmission mechanism for transmitting power to the hydraulic travel drive pump for providing power for the combine harvester to travel increases the engine speed to the speed required by the hydraulic travel drive pump, drives the power input shaft of the hydraulic travel drive pump to rotate, and generates a high-pressure hydraulic oil flow required to drive the hydraulic motor to work. The high-pressure hydraulic oil flows through the hydraulic motor, drives the output shaft of the hydraulic motor to rotate, and then drives the travel gearbox of the combine harvester to drive the combine harvester to travel;

[0010] The bevel gear transmission mechanism used to provide power to the intermediate transmission shaft that provides power to the threshing device of the combine harvester reduces the engine speed to the low speed required by the intermediate transmission shaft that provides power to the threshing device of the combine harvester, and transmits the power to the threshing drum via the intermediate transmission shaft to complete the threshing of the crops harvested by the combine harvester;

[0011] The pulley transmission for respectively providing power to the harvester's header, cleaning, grain hoist and other working devices and the grain unloading device, one of which transmits the engine power through the transmission belt to the intermediate transmission shaft that provides power to the harvester's header, cleaning, grain hoist and other working devices, and transmits the power to the harvester's header, cleaning, grain hoist and other working devices through the intermediate transmission shaft, and the other transmits the engine power through the transmission belt to the grain unloading device transmission mechanism to unload the grain stored in the granary;

[0012] The optional hydraulic pump for providing pressurized hydraulic oil flow to the working elements of the entire machine hydraulic system can be connected in series behind the hydraulic travel drive pump or the pulley transmission mechanism, introducing the power required by the hydraulic pump and converting the input rotational kinetic energy into pressurized hydraulic oil flow output by the hydraulic pump.

[0013] Preferably, the total clutch of the power output device is arranged at the input end of the power output device, serving as the total clutch for power transmission between the engine and the combine harvester. The total clutch adopts a wet normally engaged friction plate clutch and is placed in the output box body. The total clutch is generally in a normally engaged state and can be put into a disengaged state through a clutch operating device when necessary.

[0014] Preferably, the supporting structure of the shaft-wheel integrated active bevel gear I in the bevel gear transmission mechanism used to provide power to the intermediate transmission shaft of the threshing device of the combine harvester adopts a straddle structure, and one end (rear) of the active bevel gear I adopts a pair of tapered roller bearings for axial and radial positioning and balancing the axial and radial loads, and the other end (front) of the active bevel gear I is supported by a roller bearing and only needs to perform radial positioning and balance the radial load.

[0015] Preferably, the output shaft direction in the bevel gear transmission mechanism for providing power to the intermediate transmission shaft for the threshing device of the combine harvester is at a certain angle (θ) to the horizontal direction, points to the intermediate transmission shaft for the threshing device of the combine harvester, and is connected to the transmission universal joint.

[0016] Preferably, the output main shaft of the pulley transmission for providing power to the combine harvester's harvesting platform, cleaning, grain lifting and other working devices and unloading device respectively obtains input power from the sleeve shaft in the bevel gear transmission mechanism that transmits power to the hydraulic travel drive pump that provides power for the combine harvester's travel, and transmits the obtained input power to the shaft-wheel integrated active bevel gear I in the bevel gear transmission mechanism that provides power to the intermediate transmission shaft that provides power to the combine harvester's threshing device, and pulleys I and II in the pulley transmission for providing power to the combine harvester's harvesting platform, cleaning, grain lifting and other working devices and unloading device respectively.

[0017] Preferably, one end of the output main shaft in the pulley transmission used to provide power to the combine harvester's harvesting table, cleaning, grain lifting and other working devices and grain unloading devices is supported by a bearing located in the bearing end cover, and the other end is supported by a main shaft support bearing installed on the large end of the power input shaft, and the position of the power input shaft is constrained by the main shaft support bearing.

[0018] The embodiment of the present invention adopts the above technical solution, which has the following advantages:

[0019] 1. Safe and Energy-Saving Master Clutch Design: A wet, normally engaged friction plate master clutch is installed at the power input port, serving as the master power hub for the engine and combine harvester. When the equipment requires short-term overhaul, maintenance, or component adjustments, power can be disconnected simply by engaging the clutch, eliminating the need for frequent engine starts and stops. This design not only provides a safe working environment for operators but also effectively extends engine life by reducing engine start and stop frequency, achieving both safety and economic efficiency.

[0020] Second, a highly efficient bevel gear transmission mechanism: A dedicated bevel gear transmission mechanism for the hydraulic travel drive pump precisely matches the engine and hydraulic pump speed requirements through a single-stage speed-increasing transmission, optimizing power transmission efficiency. This design allows the hydraulic travel drive pump to utilize a smaller pump body while still meeting the required operating speed. This reduces component procurement costs while further streamlining the overall drive system layout.

[0021] Optimization of the straddle-type support structure: The threshing unit's power transmission path utilizes a shaft-wheel integrated active bevel gear I straddle-type support structure. This structure achieves both axial and radial positioning through a rear-end tapered roller bearing assembly, while the front-end roller bearing independently bears radial loads, creating a balanced force distribution system. This structural design significantly improves the working environment of the support bearings, enhancing the rigidity of the transmission components while making the overall structure more compact, effectively simplifying installation and commissioning, and reducing maintenance difficulties.

[0022] Fourth, improved reliability of the spindle support system: The output spindle utilizes a differentiated support structure at both ends: one end is fixedly supported by a bearing within the bearing end cap, while the other end utilizes a spindle support bearing at the large end of the power input shaft to provide a floating constraint. This design simultaneously constrains the power input shaft position through the bearing positioning reaction. This design creates a stable transmission component positioning system, ensuring the transmission accuracy of each component while completely resolving the industry pain points of traditional foreign models, such as complex structures, difficult machining, and high manufacturing costs. This significantly improves the device's engineering practicality and cost-effectiveness.

[0023] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a structural principle diagram of a multi-way power output transmission device for a combine harvester supporting engine according to the present invention;

[0026] Figure 2 This is a cross-sectional view of the structural principle of a multi-way power output transmission device for a combine harvester supporting engine according to the present invention;

[0027] Figure 3 The present invention is a diagram of the main shaft support structure of one end of the output main shaft of a multi-way power output transmission device for an engine supporting a combine harvester.

[0028] Figure numerals: 1. engine; 2. flywheel; 3. torsional vibration damper; 4. first bearing cover; 5. main clutch; 6. second bearing cover; 7. side power output shaft; 8. transmission universal joint; 9. bearing seat I; 10. driven bevel gear I; 11. driving bevel gear I; 12. bearing seat II; 13. pulley I; 14. pulley II; 15. bearing end cover; 16. output box body; 17. output main shaft; 18. bearing seat III; 19. travel drive pump; 20. driven bevel gear II; 21. driving bevel gear II; 22. sleeve shaft; 23. power input shaft; 24. sealing ring; 25. input shaft support bearing; 26. clutch housing; 27. main shaft support bearing. DETAILED DESCRIPTION

[0029] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0030] It should be noted that the terms "first," "second," "symmetrical," "array," etc. are used only to distinguish descriptions from positional descriptions and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, limitations on features such as "first" and "symmetrical" may explicitly or implicitly include one or more of these features; similarly, when the number of certain features is not limited in the form of words such as "two" or "three," it should be noted that these features also explicitly or implicitly include one or more of the number of features.

[0031] In the present invention, unless otherwise expressly specified or limited, terms such as "installation," "connection," and "fixation" should be understood broadly; for example, they may refer to fixed connection, detachable connection, or integral molding; they may refer to mechanical connection, direct connection, welding, or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specification and drawings in conjunction with specific circumstances.

[0032] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] like Figure 1-3 As shown, the present invention provides a multi-path power take-off transmission device for a combine harvester engine. The device includes a master clutch 5 for engaging or disengaging power transmission between the device and the engine 1; a bevel gear transmission mechanism for transmitting power to a hydraulic travel drive pump 19 for powering the combine harvester's travel; a bevel gear transmission mechanism for powering an intermediate drive shaft for powering the combine harvester's threshing device; and pulley transmission mechanisms for powering the combine harvester's header, cleaning, grain hoist, and other working devices, as well as the grain unloading device. The power take-off device is used to provide power for the combine harvester's travel and operations. Power from the combine harvester's engine 1 is divided into four paths after passing through the master clutch 5 of the power take-off device and outputted to the combine harvester's travel and various working devices.

[0034] In this embodiment, specifically, the power output device is provided with a power input shaft 23 as the input shaft of the power of the engine 1, which is used to provide driving force for the combine harvester to move and various working devices. The power input shaft 23 is connected to the torsional vibration damper 3 installed on the flywheel 2 of the engine 1, and transmits the power generated by the engine 1 to the power output device.

[0035] In this embodiment, the power output device is specifically provided with a master clutch 5, which is used to transmit part or all of the power input from the power input shaft 23 to the combine harvester's travel and various operating devices, enabling travel and operation. The master clutch 5 comprises a clutch housing 26, which is splined to the power input shaft 23, a clutch active friction plate, a clutch driven friction plate, a clutch spring, and a driven inner hub. The clutch driven friction plate is connected to the external splines of the driven inner hub and, via the internal splines of the driven inner hub, to the external splines of the quill 22. The clutch active friction plate is inserted into the clutch housing 26. When the active friction plate and clutch driven friction plate are engaged, the power transmitted to the power input shaft 23 is transmitted to the quill 22 via the master clutch 5 and then transmitted backward through the quill 22.

[0036] In this embodiment, specifically, the power output device is provided with a bevel gear transmission mechanism that transmits power to the hydraulic travel drive pump 19 to provide power for the combine harvester to travel. The active bevel gear II 21 fixedly installed with the sleeve shaft 22 in the bevel gear transmission mechanism transmits part of the power transmitted by the sleeve shaft 22 to the driven bevel gear II 20, and at the same time, the speed is increased to the speed required by the hydraulic travel drive pump 19. The driven bevel gear II 20 is an integrated shaft-wheel bevel gear, and its shaft end is fitted with the power input shaft that drives the hydraulic travel drive pump 19, driving the hydraulic travel drive pump 19 to rotate, thereby providing hydraulic travel drive power for the combine harvester to travel.

[0037] In this embodiment, specifically, the power output device is provided with a bevel gear transmission mechanism for providing power to the intermediate transmission shaft of the threshing device of the combine harvester. The active bevel gear Ⅰ11 in the bevel gear transmission mechanism is a sleeve shaft wheel integrated bevel gear, which is connected to the output main shaft 17 running through it by a spline, and the output main shaft 17 is inserted into the sleeve shaft 22 and connected by a spline, transmitting part of the power transmitted by the sleeve shaft 22 to the active bevel gear Ⅰ11, and the active bevel gear Ⅰ11 transmits the power to the driven bevel gear Ⅰ10, and at the same time reduces the speed to the suitable speed required by the intermediate transmission shaft of the threshing device of the combine harvester, and transmits it to the transmission universal joint 8 through the side power output shaft 7 fixed together with the driven bevel gear Ⅰ10, and transmits it to the intermediate transmission shaft that provides power to the threshing device of the combine harvester through the transmission universal transmission mechanism, thereby providing power for the threshing operation of the combine harvester.

[0038] In this embodiment, the power output device is specifically provided with pulley transmissions for respectively providing power to the combine harvester's header, cleaning, grain hoist, and other working devices, as well as the grain unloading device. One of the pulley transmissions is connected via an output main shaft 17 inserted into a sleeve shaft 22 and connected via a spline. The pulley transmits part of the power transmitted by the sleeve shaft 22 to a pulley I 13 fixed to the other end of the output main shaft 17. The engine power is then transmitted via a transmission belt to an intermediate transmission shaft that provides power to the header, cleaning, grain hoist, and other working devices. The intermediate transmission shaft then transmits the power to the header, cleaning, grain hoist, and other working devices for operation. Another pulley transmission is connected via a transmission belt to a pulley II 14 fixed to the other end of the output main shaft 17. The engine power is then transmitted via a transmission belt to the grain unloading device transmission mechanism, thereby unloading grain stored in the granary. Pulleys I 13 and II 14 may also be integrated step pulley structures.

[0039] In this embodiment, specifically, the power output device is also provided with a first bearing cover 4, a second bearing cover 6, a bearing seat I9, a bearing seat II 12, a bearing end cover 15, an output box body 16, a bearing seat III 18, an input shaft support bearing 25, a main shaft support bearing 27 and other bearings, a sealing ring 24, etc. for supporting and installing each transmission part, wherein the bearing seats are all cup-type.

[0040] The power transmission process of the present invention during specific operation is as follows:

[0041] The power output by the engine 1 is transmitted to the power input shaft 23 through the torsional vibration damper 3 installed on the flywheel 2 of the engine 1. The power input shaft 23 is connected to the clutch housing 26 of the main clutch 5 through a spline. After the main clutch 5 is engaged, the power is transmitted to the sleeve shaft 22, which is distributed to the rear-end transmission system:

[0042] The first power path is transmitted from the driving bevel gear II 21 fixed to the sleeve shaft 22 to the driven bevel gear II 20. The speed is increased by a speed-increasing transmission to the operating conditions required by the travel drive pump 19. The end of the driven bevel gear II 20 is directly connected to the power input shaft of the travel drive pump 19, driving the travel drive pump 19 to rotate and provide high-pressure hydraulic power to the combine harvester's travel system.

[0043] The second power is transmitted backward through the output spindle 17 inserted into the sleeve shaft 22 and connected with the spline, and is further distributed to the threshing device and the working device by the output spindle 17;

[0044] The first branch of power from the output main shaft 17 is transmitted to the driven bevel gear Ⅰ10 through the driving bevel gear Ⅰ11 mounted on its exterior and connected by a spline. The speed is then reduced to match the threshing unit's requirements. The driven bevel gear Ⅰ10 is fixed to the side power output shaft 7 and transmits power to the intermediate drive shaft of the threshing unit through the transmission universal joint 8 and the universal transmission mechanism, driving the threshing drum.

[0045] The second branch of power from the output main shaft 17 is transmitted by a pulley Ⅰ13 fixed at one end thereof through a transmission belt to the intermediate transmission shaft of the working devices such as the header, cleaning, and grain lifting. The power is then distributed to each working device through the intermediate transmission shaft.

[0046] The third branch of power from the output main shaft 17 is transmitted to the grain unloading device transmission mechanism through the transmission belt by the pulley II 14 fixed at the other end, driving the grain silo unloading operation. The pulley I 13 and pulley II 14 can be designed as an integrated step pulley structure according to needs to achieve integrated power transmission;

[0047] This device utilizes a wet, normally engaged friction plate master clutch 5, integrated within the output box housing 16, offering the significant advantages of being maintenance-free and having a long lifespan. When the combine harvester requires short-term component adjustments, repairs, or maintenance, the clutch operating device disengages the master clutch 5, severing the power connection between the engine 1 and the transmission system. This ensures operator safety while avoiding frequent engine starts and stops, effectively extending the service life of the engine 1 and related transmission components.

[0048] In the transmission system, a first-stage bevel gear speed-increasing mechanism is used to transmit power to the travel drive pump 19. The driving bevel gear II 21, mounted on a sleeve shaft 22, meshes with the driven bevel gear II 20, precisely increasing the engine speed to the optimal operating speed range for the travel drive pump 19. This design fully leverages the high-efficiency operating characteristics of the hydraulic piston pump, optimizing speed matching and transmission efficiency between the engine 1 and the travel drive pump 19. This allows for a smaller travel drive pump 19, reducing component costs while streamlining the system layout.

[0049] In the threshing unit's power transmission mechanism, the integrated shaft-wheel driving bevel gear I11 utilizes a straddle-type support structure: its rear end is mounted on bearing seat II12 via a pair of tapered roller bearings for both axial and radial positioning, while its front end is supported by roller bearings on the output box body 16 to bear radial loads. This structural design balances the force distribution of the supporting bearings, making the overall transmission structure more compact, significantly improving installation ease and adjustment precision, and effectively reducing maintenance difficulties.

[0050] The output spindle 17's support system features a differentiated design at both ends: one end is fixedly supported by a bearing within the bearing end cap 15, while the other end is supported by a spindle support bearing 27 mounted on the larger end of the power input shaft 23, providing a floating constraint. This bearing's reaction force simultaneously constrains the axial position of the power input shaft 23. This positioning solution creates a stable transmission component support system, ensuring the transmission accuracy of all components while completely resolving the industry pain points of traditional foreign models, such as complex structures, difficult transmission component machining, and high manufacturing costs. This significantly enhances the device's engineering practicality.

[0051] Layout flexibility design

[0052] To meet the different layout requirements of the various operating devices on the combine harvester, this solution supports flexible switching of power output paths:

[0053] The bevel gear transmission mechanism of the threshing device, the active bevel gear Ⅰ11 - the driven bevel gear Ⅰ10 - the side power output shaft 7 and the pulley transmission mechanism pulley Ⅰ13 / pulley Ⅱ14 of the working device such as the cutting table can interchange the power output objects.

[0054] like Figure 2As shown, when the layout needs to be adjusted, the transmission universal joint 8 can be changed into the transmission mechanism of the cutting table, cleaning and other working devices, and the original pulley transmission path is converted to provide power to the intermediate transmission shaft of the threshing device, and the flexible adaptation of power distribution is achieved through modular design.

[0055] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A multi-way power output transmission device for a combine harvester engine, characterized in that: include: The main clutch, the first bevel gear transmission mechanism, the second bevel gear transmission mechanism, the pulley transmission mechanism, the output box body, the support bearing, the transmission box cover and the first bearing cover; The master clutch is arranged at the input end of the device and connected to the output shaft of the engine; The input end of the first bevel gear transmission mechanism is connected to the output end of the main clutch, and the output end is connected to the power input shaft of the hydraulic travel drive pump; The input end of the second bevel gear transmission mechanism is connected to the output end of the main clutch, and the output end is connected to the intermediate transmission shaft of the threshing device through a transmission universal joint; The input end of the pulley transmission mechanism is connected to the output end of the main clutch, and the output end is connected to the intermediate transmission shaft of the harvesting platform / cleaning / grain lifting working device and the grain unloading device transmission mechanism through a transmission belt; The output ends of the hydraulic travel drive pump and the pulley transmission mechanism can be connected in series with the hydraulic pump of the entire machine hydraulic system; The first bearing cover is used to seal the output box body, so that the power output transmission device is separated from the engine and its accessory flywheel and torsional vibration damper into two parts. The first bearing cover can also be used to install the support bearing of the power input shaft.

2. The multi-way power output transmission device for a combine harvester engine according to claim 1, characterized in that: The power input shaft is connected to the torsional vibration damper installed on the engine flywheel. The power input shaft is fixed to the inner spline of the clutch housing of the main clutch, and is connected to the outer spline of the sleeve shaft through the clutch active friction plate, the clutch driven friction plate, the inner spline of the driven inner hub, and the main clutch adopts a wet normally engaged friction plate clutch, which is placed in the output box body and realizes engagement and disengagement with the engine output shaft through the clutch operating device.

3. The multi-way power output transmission device for a combine harvester engine according to claim 1, characterized in that: The output shaft of the second bevel gear transmission mechanism forms an angle θ with the horizontal direction. One end of the output shaft is supported by the output box body through a bearing, and the other end is connected to the intermediate transmission shaft of the threshing device through a transmission universal joint.

4. The multi-way power output transmission device for a combine harvester engine according to claim 1, characterized in that: The shaft-wheel integrated active bevel gear I of the second bevel gear transmission mechanism is sleeved on the output main shaft. The rear part of the active bevel gear I is supported on the output box body through a pair of tapered roller bearings and a bearing seat II, and the front part is supported on the output box body through a roller bearing.

5. The multi-way power output transmission device for a combine harvester engine according to claim 1, characterized in that: The output main shaft of the pulley transmission mechanism is sleeved on the sleeve shaft and rotates synchronously with the sleeve shaft. Pulley I and pulley II are fixedly set on the output main shaft. Pulley I is connected to the intermediate transmission shaft of the cutting table / cleaning / grain lifting working device through a transmission belt, and pulley II is connected to the grain unloading device transmission mechanism through a transmission belt.

6. The multi-way power output transmission device for a combine harvester engine according to claim 4, characterized in that: One end of the output main shaft is supported on the bearing end cover through a bearing, and the other end is supported on the power input shaft through a main shaft support bearing. The outer ring of the main shaft support bearing is fixedly installed in the first bearing cover of the output box body.

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