Multifunctional harvester chassis

Abstract

The invention provides a multifunctional harvester chassis which comprises a main drive axle, a steering drive axle, an engine assembly and a clutch which are arranged between the main drive axle and the steering drive axle, and further comprises a gearbox arranged behind the clutch, and the clutch transmits power to the gearbox through a transmission shaft. The gearbox sequentially comprises a hydraulic mechanical power flow dividing chamber, a main speed changing chamber and an auxiliary speed changing chamber, a hydraulic pump and a hydraulic motor are arranged on the two sides of the gearbox respectively, a power flow dividing switching assembly is arranged in the gearbox, and switching between a hydraulic driving mode and a mechanical driving mode is achieved through the power flow dividing switching assembly. The chassis further comprises a power output transfer chamber and a power output transmission chamber which are arranged behind the main drive axle so that dual-power output can be achieved through the power output transfer chamber and the power output transmission chamber. Switching of hydraulic drive and mechanical drive and dual-power output can be achieved, idle loss of a hydraulic system can be eliminated when the hydraulic drive mode does not work, and the service life is prolonged.

Description

Technical Field

[0001] This application relates to the field of harvester chassis equipment technology, specifically a multi-functional harvester chassis. Background Technology

[0002] A harvester is a specialized agricultural machine used to harvest crops, such as corn and other grains. Through automated operation, it greatly improves harvesting efficiency and reduces the labor intensity of farmers. It is an indispensable piece of equipment in modern agricultural production and is widely used in current agricultural production activities, occupying a large market share.

[0003] However, current harvester chassis have relatively limited functions, often only used for harvesting operations, resulting in low utilization. For example, corn harvesting is mainly concentrated in autumn, with an operating time of no more than thirty days. After the harvest, the harvester sits idle for a long time. Farmers not only need to harvest crops but also perform field transportation, deep plowing, and sowing. Purchasing an additional tractor for transportation could increase the user's input costs. In response, Chinese patent application CN223024991U provides a harvester chassis device and harvester that can not only be used for harvesting but also, through modular disassembly and bidirectional driving, enable tractor-based transportation. However, this device lacks instructions on power switching, making it difficult to achieve a smooth and seamless power transition. Furthermore, existing technology makes it difficult to completely stop the hydraulic components during actual power switching, resulting in prolonged idling of the hydraulic pump and reverse-drive rotation of the hydraulic motor. This leads to reduced equipment lifespan, high-temperature consumption of hydraulic oil, and reduced transmission efficiency.

[0004] Therefore, existing technologies need further improvement and enhancement. Summary of the Invention

[0005] The purpose of this application is to address the shortcomings of the prior art and solve the technical problems raised in the background art.

[0006] This application provides a multi-functional harvester chassis, including a main drive axle, a steering drive axle, and an engine assembly and clutch disposed between the two. It also includes a gearbox disposed after the clutch, which transmits power to the gearbox via a drive shaft. The gearbox sequentially includes a hydraulic-mechanical power split chamber, a main transmission chamber, and a secondary transmission chamber. A hydraulic pump and a hydraulic motor are respectively disposed on both sides of the gearbox. A power split switching component is disposed within the gearbox to achieve switching between hydraulic drive mode and mechanical drive mode. The chassis also includes a power output transfer chamber and a power output transmission chamber, both located behind the main drive axle, to achieve dual power output.

[0007] As a preferred embodiment of this application, the power splitting switching assembly includes a hydraulic power input gear, a first meshing sleeve, a first shift fork, and a first meshing tooth seat. The first meshing tooth seat meshes with the transmission shaft of the hydraulic mechanical power splitting chamber and meshes with the first meshing sleeve externally. The first shift fork is connected to a groove on the surface of the first meshing sleeve to move the first meshing sleeve to slide in the horizontal direction.

[0008] As a preferred embodiment of this application, the power split switching assembly further includes a hydraulic power output gear, a second meshing sleeve, a second shift fork, and a second meshing tooth seat. The second meshing tooth seat engages internally with the drive shaft of the main transmission chamber and externally with the second meshing sleeve. The second shift fork is connected to a groove on the surface of the second meshing sleeve to move the second meshing sleeve to slide horizontally.

[0009] In a preferred embodiment of this application, a shift fork shaft is provided at the top of the gearbox, and a first shift fork and a second shift fork are mounted on the shift fork shaft. The first shift fork and the second shift fork move horizontally in sync through the horizontal sliding action of the shift fork shaft.

[0010] In a preferred embodiment of this application, the harvester chassis also includes a dual-drive switching box. The dual-drive switching box includes a box body, a connecting rod, and a spring. The connecting rod is placed inside the box body. Both the first and second shift forks are provided with connecting sleeves and connected to the shift fork shaft. The connecting rod is connected to the second shift fork through the connecting sleeves, so that the shift fork shaft connected to the second shift fork can move horizontally through the connecting rod, and drive the first shift fork to move synchronously.

[0011] In a preferred embodiment of this application, the hydraulic power input gear and the hydraulic power output gear are double gear structures, each including a connected large gear and a small gear. The large gear of the hydraulic power input gear transmits power to the hydraulic pump through an idler gear, and the large gear of the power output gear receives the output power of the hydraulic motor through an idler gear.

[0012] In a preferred embodiment of this application, the first shift fork and the second shift fork move toward the clutch direction, the first engagement sleeve engages with the pinion and the first engagement tooth seat of the hydraulic power input gear, and the second engagement sleeve engages with the pinion and the second engagement tooth seat of the hydraulic power output gear, so that the power is hydraulically driven.

[0013] In a preferred embodiment of this application, the first shift fork and the second shift fork move toward the main drive axle, the first engagement sleeve engages with the input end of the main transmission chamber drive shaft, and the second engagement sleeve engages with the surface of the second engagement tooth seat, so that the power is mechanically driven.

[0014] In a preferred embodiment of this application, the power output transfer chamber includes an upper transmission member and a lower transmission member. The output end of the upper transmission member is provided with a bevel gear set, which is located in the power output transmission chamber and transmits the main power output to both sides. The lower transmission member can mesh with the upper transmission member and extends through the power output transmission chamber to transmit the auxiliary power output to the rear.

[0015] As a preferred embodiment of this application, the chassis also includes a two-wheel drive / four-wheel drive switching box. The two-wheel drive / four-wheel drive switching box is located behind the auxiliary transmission chamber and at the bottom of the chassis between the auxiliary transmission chamber and the main drive axle. The two-wheel drive / four-wheel drive switching box is provided with a two-wheel drive / four-wheel drive switching sleeve and a two-wheel drive / four-wheel drive switching output shaft. A four-wheel drive transmission shaft is provided between the two-wheel drive / four-wheel drive switching box and the steering drive axle so that the two-wheel drive / four-wheel drive switching can be achieved by the horizontal sliding of the two-wheel drive / four-wheel drive switching sleeve.

[0016] The beneficial effects of this application are as follows: This application, by setting up a power splitting and switching component, enables seamless and free switching between hydraulic and mechanical drive of the chassis. Furthermore, by synchronously operating the first and second shift forks, it achieves synchronous switching between the first and second meshing sleeves, realizing complete isolation and mutual exclusion of hydraulic and mechanical drives. This harvester chassis can use either hydraulic or mechanical drive for movement, whether operating as a harvester or a tractor. The power output split chamber and power output transmission chamber enable dual power output, allowing the harvester chassis to function as both a harvester and a tractor simultaneously. Moreover, when switching to mechanical drive mode, the input and output power of the hydraulic pump and hydraulic motor can be simultaneously cut off, eliminating hydraulic pump idling losses and preventing the rotation of the drive shaft from reverse-dragging the gears inside the hydraulic motor under mechanical drive, thus improving the service life of the hydraulic system and reducing hydraulic oil temperature and losses. Attached Figure Description

[0017] Figure 1 The overall structural diagram provided for this application; Figure 2 This is a cross-sectional structural diagram provided for this application; Figure 3 for Figure 2 A magnified view of a section at point A; Figure 4 This is an overall structural diagram from another perspective of this application; Figure 5 for Figure 4 A magnified view of section B; Figure 6 This is a top view of a portion of the structure of this application; Figure 7 This is a cross-sectional structural diagram of part of the structure of this application from another perspective; Figure 8This is a schematic diagram of the connection structure between the hydraulic motor and the gearbox in this application; Figure 9 This is a schematic diagram of the structure of the first meshing slide provided in this application.

[0018] Figure label: 1. Main drive axle; 2. Steering drive axle; 3. Engine assembly; 4. Clutch; 5. Gearbox; 6. Hydraulic-mechanical power splitter chamber; 7. Main transmission chamber; 71. Main transmission power input gear shaft; 8. Secondary transmission chamber; 9. Hydraulic pump; 10. Hydraulic motor; 11. Hydraulic power input gear; 12. First meshing sleeve; 13. First shift fork; 14. First meshing gear seat; 15. Hydraulic power output gear; 16. Second meshing sleeve; 17. Second shift fork; 18. Second meshing gear seat; 19. Shift fork shaft; 20. Dual drive switching box; 21. Connecting rod; 211. Shift head; 22. Connecting sleeve; 23. Spring; 24. Idler gear; 25. Power output transfer chamber; 251. Power output transmission chamber; 26. Upper transmission component; 27. Lower transmission component; 28. Bevel gear set; 29. ​​Main PTO output shaft; 30. Secondary PTO output shaft; 31. Two-wheel / four-wheel drive switching box; 32. Two-wheel / four-wheel drive switching output shaft; 33. Four-wheel drive drive shaft. Detailed Implementation

[0019] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0021] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0024] like Figures 1 to 9 As shown, a multi-functional harvester chassis includes a main drive axle 1, a steering drive axle 2, an engine assembly 3 and a clutch 4 disposed between the two, and a gearbox 5 disposed after the clutch 4. The clutch 4 transmits power to the gearbox 5 through a drive shaft. The gearbox 5 includes a hydraulic-mechanical power split chamber 6, a main transmission chamber 7 and an auxiliary transmission chamber 8 in sequence. A hydraulic pump 9 and a hydraulic motor 10 are respectively disposed on both sides of the gearbox 5. A power split switching component is disposed in the gearbox 5 to switch between hydraulic drive mode and mechanical drive mode. The chassis also includes a power output transfer chamber 25 and a power output transmission chamber 251, which are disposed after the main drive axle 1 to achieve dual power output.

[0025] The hydraulic pump 9 and the hydraulic motor 10 are located on both sides of the gearbox 5, which facilitates modular assembly and disassembly of the hydraulic pump 9 and the hydraulic motor 10, making maintenance convenient and also facilitating the cooling of the hydraulic oil.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the power splitting and switching assembly includes a hydraulic power input gear 11, a first meshing sleeve 12, a first shift fork 13, and a first meshing gear seat 14. The first meshing gear seat 14 internally meshes with the transmission shaft of the hydraulic mechanical power splitting chamber 6 and externally meshes with the first meshing sleeve 12. The first shift fork 13 is connected to the groove on the surface of the first meshing sleeve 12 to move the first meshing sleeve 12 to slide in the horizontal direction.

[0027] Furthermore, the power split switching assembly also includes a hydraulic power output gear 15, a second engagement sleeve 16, a second shift fork 17, and a second engagement gear seat 18. The second engagement gear seat 18 engages internally with the drive shaft of the main transmission chamber 7 and externally with the second engagement sleeve 16. The second shift fork 17 is connected to the groove on the surface of the second engagement sleeve 16 to move the second engagement sleeve 16 to slide horizontally.

[0028] Among them, such as Figure 3 , Figure 5 and Figure 9 As shown, the first shift fork 13 and the second shift fork 17, the first engagement sleeve 12 and the second engagement sleeve 16 have similar structures. Taking the first shift fork 13 and the first engagement sleeve 12 as examples, the surface of the first engagement sleeve 12 is provided with a groove, the first shift fork 13 can be placed in the groove, and the first shift fork 13 and the first engagement sleeve 12 can rotate relative to each other. For the first engagement tooth seat 14 and the second engagement tooth seat 18, their structures are also similarly designed. Taking the first engagement tooth seat 14 as an example, it is a ring structure, its inner ring is hinged to the surface of the transmission shaft of the hydraulic mechanical power diversion chamber 6, and its outer ring is engaged with the inner wall of the first engagement sleeve 12.

[0029] It is understandable that the structure of clutch 4 and the drive shaft behind it is similar to that in the prior art. As can be seen from the figure, the drive shaft is composed of multiple shaft segments from front to back, such as the drive shaft structure in the hydraulic mechanical power split chamber 6 and the power input shaft structure in the main transmission chamber 7. These structures are combined to form a relatively long drive shaft structure, and a lower shaft is also set below the transmission chamber. These structures are similar to the clutch 4 and drive shaft structure in the prior art, so they will not be described in detail here.

[0030] In a preferred embodiment of this application, a shift fork shaft 19 is provided at the top of the gearbox 5. The first shift fork 13 and the second shift fork 17 are mounted on the shift fork shaft 19, and the first shift fork 13 and the second shift fork 17 move horizontally synchronously through the horizontal sliding action of the shift fork shaft 19.

[0031] Specifically, such as Figure 8 As shown, the shift fork shaft 19 is located at the inner top of the gearbox 5 and can pass through the inner wall and partition of the gearbox 5 in the front and back. The inner wall and partition of the gearbox 5 can limit the shift fork shaft 19, ensuring that the shift fork shaft 19 can only move in the front and back horizontal direction.

[0032] Furthermore, the harvester chassis also includes a dual-drive switching box 20, which includes a box body, a connecting rod 21, and a spring 23. The connecting rod 21 is placed inside the box body. The first shift fork 13 and the second shift fork 17 are both provided with connecting sleeves 22 and connected to the shift fork shaft 19. The connecting rod 21 is connected to the second shift fork 17 through the connecting sleeve 22, so that the shift fork shaft 19 connected to the second shift fork 13 can move horizontally through the connecting rod 21, and drive the first shift fork 13 to move synchronously.

[0033] A portion of the connecting rod 21 extends out of the housing for easy connection to the cab. The connecting rod 21 inside the housing is equipped with a dial head 211 structure to facilitate the movement of the shift fork. To facilitate the movement of the shift fork structure, a groove structure is provided on the upper surface of the connecting sleeve 22. The dial head 211 can be placed in the groove. When the dial head 211 is driven back and forth by the connecting rod, the dial head 211 moves in the groove until it contacts the inner wall of the groove, thereby pushing the groove to move and thus driving the shift fork to move back and forth.

[0034] In use, the box body can be connected to the cab via a rope or flexible shaft. A gear lever is installed inside the cab and connected to the rope or flexible shaft. Pushing or pulling the gear lever forward or backward drives the shift fork shaft 19 to slide forward and backward; for example... Figure 5 and Figure 8 As shown, the connecting rod 21 is connected to the gear lever, and the top of the second shift fork 17 is provided with a connecting sleeve 22. The upper surface of the connecting sleeve 22 is provided with a shift groove, which is connected to the shift head 211 provided on the connecting rod 21 and fixed to the shift fork shaft 19. This allows the connecting rod 21 to drive the shift fork shaft 19 to move. Since the first shift fork 13 is also fixed on the surface of the shift fork shaft 19, when the shift fork shaft 19 moves, it simultaneously drives the first shift fork 13 and the second shift fork 17 to move.

[0035] Understandably, the spring 23 can be arranged around the surface of the connecting rod 21, with one end abutting against the inner wall of the housing. When the connecting rod 21 moves, the spring 23 is compressed or stretched according to the movement, thereby optimizing the feel of the driver pushing or pulling the gear lever and improving the user experience.

[0036] Alternatively, in another embodiment, the matching structure of the first shift fork 13 and the matching structure of the second shift fork 17 can be respectively set on the surface of the two shift fork shafts 19, so as to pull the two shift fork structures respectively and realize the separate driving of the first shift fork 13 and the second shift fork 17.

[0037] In a preferred embodiment of this application, both the hydraulic power input gear 11 and the hydraulic power output gear 15 include a large gear and a small gear connected together. The large gear of the hydraulic power input gear 11 transmits power to the hydraulic pump 9 through the idler gear 24, and the large gear of the power output gear receives the output power of the hydraulic motor 10 through the idler gear 24.

[0038] like Figure 3 and Figure 7As shown, the hydraulic power input gear 11 and the hydraulic power output gear 15 have the same structure. Taking the hydraulic power input gear 11 as an example, it can adopt a double gear structure, with two gears of different diameters. The smaller gear is close to the first meshing gear seat 14, while the larger gear is away from the first meshing gear seat 14. A bearing is installed between the hydraulic power input gear 11 and the transmission shaft of the hydraulic mechanical power splitting chamber 6. Similarly, the hydraulic power output gear 15 is the same as the hydraulic power input gear 11, also adopting a double gear structure.

[0039] Furthermore, the first shift fork 13 and the second shift fork 17 move toward the clutch 4, the first engagement sleeve 12 engages with the pinion of the hydraulic power input gear 11 and the first engagement gear seat 14, and the second engagement sleeve 16 engages with the pinion of the hydraulic power output gear 15 and the second engagement gear seat 18, so that the power is hydraulically driven.

[0040] It should be noted that both the hydraulic drive and mechanical drive share the power output of clutch 4 and are controlled by the travel clutch. The hydraulic drive and mechanical drive can only work when the chassis travel clutch is engaged. In other words, switching between hydraulic drive and mechanical drive can only be done when clutch 4 is disengaged and the equipment is stopped.

[0041] Specifically, the power of engine assembly 3 is transmitted to the drive shaft via clutch 4. The drive shaft extends into gearbox 5. In the basic state, i.e., in neutral, the first engagement sleeve 12 is centered and only engages with the surface of the first engagement gear seat 14. At this time, both mechanical and hydraulic drives are disconnected. When hydraulic drive is needed, the first shift fork 13 moves forward, causing the first engagement sleeve 12 to move forward, so that the first engagement sleeve 12 spans the surface of the first engagement gear seat 14 and the surface of the pinion of the hydraulic power input gear 11. Power is transmitted from the drive shaft of the hydraulic-mechanical power splitter chamber 6 to the first engagement gear seat 14, the first engagement sleeve 12, and finally to the pinion of the hydraulic power input gear 11. The pinion is connected to the large gear, and then through the idler gear 24 engaged with the large gear, the power is input into the hydraulic pump 9. The hydraulic pump 9 then delivers the power to the opposite side. The hydraulic motor 10 outputs hydraulic power, which is transmitted to the large gear of the hydraulic power output gear 15 via the idler wheel 24 connected to the hydraulic motor 10. Since the large gear and small gear of the hydraulic power output gear 15 are also connected, the power is transmitted to the small gear. Furthermore, since the first shift fork 13 and the second shift fork 17 move synchronously, the second shift fork 17 drives the second meshing sleeve 16 forward. At this time, the second meshing sleeve 16 spans the second meshing tooth seat 18 and the small gear of the hydraulic power output gear 15. The power is transmitted through the small gear of the hydraulic power output gear 15 to the second meshing sleeve 16 and the second meshing tooth seat 18, and then to the drive shaft of the main transmission chamber 7, that is, the input shaft of the main transmission chamber 7, realizing the transmission of hydraulic power, and continuing to transmit it to the auxiliary transmission chamber 8 to continue outputting driving power.

[0042] It is understood that the hydraulic drive mentioned in this application is not simply hydraulic power output, but rather a driving mechanism achieved through the traditional mechanical transmission of the gearbox 5. It is a switch between hydraulic + mechanical drive and pure mechanical drive, and the hydraulic pump 9 and hydraulic motor 10 are connected to the idler wheel 24 in a similar structure.

[0043] Furthermore, the first shift fork 13 and the second shift fork 17 move toward the main drive axle 1, the first engagement sleeve 12 engages with the input end of the transmission shaft of the main transmission chamber 7, and the second engagement sleeve 16 engages only with the surface of the second engagement tooth seat 18, so that the power is mechanically driven.

[0044] Specifically, similar to the hydraulic drive scheme, to switch the chassis drive mode to mechanical drive mode, simply move the first shift fork 13 backward, and simultaneously move the second shift fork 17 backward. At this time, the first meshing sleeve 12 connected to the first shift fork 13 meshes with the main transmission power input gear shaft 71 behind the first meshing gear seat 14, and simultaneously spans the surface of the gear shaft and the first meshing gear seat 14. This allows the power input from the transmission shaft of the hydraulic-mechanical power split chamber 6 to be transmitted to the rear gear shaft, and disconnects the hydraulic power input gear 11 from the hydraulic drive. At the same time, the second shift fork 17 moves synchronously, causing the second shift fork 17 to drive the second meshing sleeve 16 to move backward along the second meshing gear seat 18. As can be seen from the figure, the width of the second meshing gear seat 18 is greater than that of the first meshing gear seat 14, which can provide sufficient sliding space for the second meshing sleeve 16, putting it in neutral and eliminating the back-dragging of the hydraulic motor 10, thus realizing mechanical drive.

[0045] As can be seen from the control method, the hydraulic drive and the mechanical drive are independent of each other and will not work at the same time. This application does not require setting up an electrical control structure or an additional clutch control structure to achieve independent control of the hydraulic drive and the mechanical drive. The structure is simple, the cost is low, and the operation is convenient.

[0046] As a preferred embodiment of this application, such as Figure 2 and Figure 6 As shown, the chassis also includes a power output transfer chamber 25 and a power output transmission chamber 251. The power output transfer chamber 25 is located behind the main drive axle 1 and includes an upper transmission component 26 and a lower transmission component 27. The output end of the upper transmission component 26 is provided with a bevel gear set 28, which is located in the power output transmission chamber 251 and transmits the main power output to both sides. The lower transmission component 27 meshes with the upper transmission component 26 and extends through the power output transmission chamber 251 to transmit the auxiliary power output to the rear.

[0047] Regardless of whether hydraulic or mechanical drive is used, the structure of the auxiliary transmission chamber 8 is the same as the shifting structure of the harvester chassis or tractor chassis in the prior art. Therefore, this application will not describe in detail the shifting structure in the main transmission chamber 7 and the auxiliary transmission chamber 8, which is similar to that in the prior art.

[0048] For the power output transfer chamber 25, the engine power is transmitted to the power output transfer chamber 25 through the clutch via the power output connecting shaft. The power output connecting shaft (the working power output shaft of the clutch passing through the entire gearbox 5) is connected to the upper transmission component 26, which is a double gear shaft. A bevel gear set 28 is set at the rear output end. The first bevel gear is located at the rear end of the double gear shaft. As the double gear shaft rotates, the second bevel gear is perpendicular to the first bevel gear. The main PTO output shaft 29 is set on both sides of the power output transmission chamber 251. Power is transmitted to the main PTO output shaft 29 through the second bevel gear, which can provide harvester operating power to the chassis and realize the harvester function of the chassis. It should be noted that the first bevel gear is the driving gear and the second bevel gear is the driven gear.

[0049] The lower transmission component 27 is mounted on the auxiliary PTO output shaft 30 below the upper transmission component 26. The lower transmission component 27 includes two driven gears with different numbers of teeth and a sliding sleeve with a meshing function, similar to the structure described above. Through the structure of the meshing sliding sleeve, the high and low speed switching and power on / off of the auxiliary PTO output shaft 30 are realized. Thus, when the power is connected, the auxiliary PTO output shaft 30, which extends through the power output transmission chamber 251, can output tractor operating power to the rear, realizing the tractor function of the chassis. This enables the harvester chassis to serve two purposes and enriches the functions of the equipment.

[0050] Understandably, since the auxiliary PTO output shaft 30 is equipped with a meshing sleeve structure, it can freely switch power on and off. However, since the main power output shaft is driven by the upper transmission member 26, and the power of the upper transmission member 26 relies on the power output connection shaft of the clutch 4, the output power of the main PTO output shaft 29 cannot be cut off. When the main PTO output shaft 29 is not needed, the harvester power connection can be disconnected from the main PTO output shaft 29, so that the main PTO output shaft 29 can idle without load.

[0051] As a preferred embodiment of this application, such as Figure 2 and Figure 4 As shown, the chassis also includes a two-wheel drive / four-wheel drive switching box 31. The two-wheel drive / four-wheel drive switching box 31 is located behind the auxiliary transmission chamber 8 and at the bottom of the chassis between the auxiliary transmission chamber 8 and the main drive axle 1. The two-wheel drive / four-wheel drive switching box 31 is provided with a two-wheel drive / four-wheel drive switching sleeve (which also has a meshing function) and a two-wheel drive / four-wheel drive switching output shaft 32. A four-wheel drive transmission shaft 33 is provided between the two-wheel drive / four-wheel drive switching box 31 and the steering drive axle so that the two-wheel drive / four-wheel drive switching can be achieved by the horizontal sliding of the two-wheel drive / four-wheel drive switching sleeve.

[0052] Among them, the differential behind the auxiliary transmission chamber 8 provides power to the main drive axle 1 through the active bevel gear shaft. The active gear on the surface of the active bevel gear shaft can mesh with the driven gear in the two-wheel drive switching box 31, and the two-wheel drive switching can be realized through the sliding of the sliding sleeve. Of course, the two-wheel drive switching can be realized whether it is hydraulic drive or mechanical drive.

[0053] As can be seen from the figure, the main improvements and innovations of this application are concentrated in the hydraulic mechanical power split chamber 6, the main transmission chamber 7, the power output split chamber 25, and the power output transmission chamber 251. As for the mechanical transmission parts in the original gearbox 5 of the harvester and other parts, this application will not elaborate on them.

[0054] It should be noted that the chassis of this application adopts dual power output. Its advantage lies in the fact that the main PTO outputs power laterally, which is particularly suitable for harvester power acquisition, while the auxiliary PTO outputs power longitudinally, which is suitable for tractors to be equipped with various agricultural implements. This allows the chassis to simultaneously realize the functions of a harvester and a tractor, achieving dual-purpose functionality. This can solve the industry pain point of idle harvesters, reduce the additional expenditure cost for users to purchase tractors, increase users' income, improve users' economic benefits, and has significant social benefits.

[0055] Furthermore, the chassis structure of this application, as a multi-functional special gearbox chassis, has both hydraulic and mechanical dual-mode drive. It can not only be used as a chassis for harvesters and tractors at the same time, serving two purposes in one machine, but also allows for easy switching between hydraulic and mechanical dual-mode drive with a single lever. This makes operation convenient and enables stepless speed change and precise speed control.

[0056] Furthermore, the dual-mode drive of this application allows for the selection of different drive modes according to needs. For harvester operations, hydraulic drive is preferred, while mechanical drive is used for road travel. For tractors operating under heavy loads, mechanical drive is preferred, such as for deep plowing and transportation; for light loads, hydraulic drive is preferred, such as for sowing, ridging, fertilizing, and spraying pesticides. Optimizing the drive mode can achieve energy conservation and emission reduction, resulting in significant economic and social benefits.

[0057] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0058] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0059] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A multi-functional harvester chassis, comprising a main drive axle, a steering drive axle, and an engine assembly and clutch disposed between the two, characterized in that, It also includes a gearbox located after the clutch, with the clutch transmitting power to the gearbox via a drive shaft. The gearbox sequentially includes a hydraulic-mechanical power split chamber, a main transmission chamber, and a secondary transmission chamber. A hydraulic pump and a hydraulic motor are respectively installed on both sides of the gearbox. A power split switching component is installed inside the gearbox to switch between hydraulic drive mode and mechanical drive mode. The chassis also includes a power output transfer chamber and a power output transmission chamber, both located behind the main drive axle, to achieve dual power output.

2. The multi-functional harvester chassis as described in claim 1, characterized in that, The power splitting and switching assembly includes a hydraulic power input gear, a first meshing sleeve, a first shift fork, and a first meshing tooth seat. The first meshing tooth seat internally meshes with the transmission shaft of the hydraulic mechanical power splitting chamber and externally meshes with the first meshing sleeve. The first shift fork is connected to a groove on the surface of the first meshing sleeve to move the first meshing sleeve to slide horizontally.

3. The multi-functional harvester chassis as described in claim 2, characterized in that, The power splitting and switching assembly also includes a hydraulic power output gear, a second meshing sleeve, a second shift fork, and a second meshing tooth seat. The second meshing tooth seat meshes internally with the drive shaft of the main transmission chamber and externally with the second meshing sleeve. The second shift fork is connected to a groove on the surface of the second meshing sleeve to move the second meshing sleeve to slide horizontally.

4. The multi-functional harvester chassis as described in claim 3, characterized in that, The gearbox is equipped with a shift fork shaft at the top. The first shift fork and the second shift fork are mounted on the shift fork shaft and slide horizontally through the shift fork shaft, thereby driving the first shift fork and the second shift fork to move horizontally synchronously.

5. A multi-functional harvester chassis as described in claim 4, characterized in that, The harvester chassis also includes a dual-drive switching box, which includes a box body, a connecting rod, and a spring. The connecting rod is placed inside the box body. Both the first and second shift forks are provided with connecting sleeves and connected to the shift fork shaft. The connecting rod is connected to the second shift fork through the connecting sleeves, so that the shift fork shaft can be driven to move horizontally through the connecting rod, and the first shift fork can be driven to move synchronously.

6. The multi-functional harvester chassis as described in claim 4, characterized in that, The hydraulic power input gear and the hydraulic power output gear are double gear structures, each including a connected large gear and a small gear. The large gear of the hydraulic power input gear transmits power to the hydraulic pump through an idler gear, and the large gear of the power output gear receives the output power of the hydraulic motor through an idler gear.

7. A multi-functional harvester chassis as described in claim 6, characterized in that, The first shift fork and the second shift fork move toward the clutch. The first engagement sleeve engages with the pinion of the hydraulic power input gear and the first engagement gear seat. The second engagement sleeve engages with the pinion of the hydraulic power output gear and the second engagement gear seat, thereby enabling hydraulic drive.

8. A multi-functional harvester chassis as described in claim 7, characterized in that, The first shift fork and the second shift fork move toward the main drive axle. The first engagement sleeve engages with the input end of the main transmission chamber drive shaft, and the second engagement sleeve engages with the surface of the second engagement tooth seat, so that the power is mechanically driven.

9. A multi-functional harvester chassis as described in claim 1, characterized in that, The power output transmission chamber includes an upper transmission component and a lower transmission component. The output end of the upper transmission component is provided with a bevel gear set, which is located in the power output transmission chamber and transmits the main power output to both sides. The lower transmission component can mesh with the upper transmission component and extends through the power output transmission chamber to transmit the auxiliary power output to the rear.

10. A multi-functional harvester chassis as described in claim 1, characterized in that, The chassis also includes a two-wheel drive / four-wheel drive switching box, which is located behind the auxiliary transmission chamber and at the bottom of the chassis between the auxiliary transmission chamber and the main drive axle. The two-wheel drive / four-wheel drive switching box is provided with a two-wheel drive / four-wheel drive switching sleeve and a two-wheel drive / four-wheel drive switching output shaft. A four-wheel drive transmission shaft is provided between the two-wheel drive / four-wheel drive switching box and the steering drive axle so that the two-wheel drive / four-wheel drive switching can be achieved by the horizontal sliding of the two-wheel drive / four-wheel drive switching sleeve.

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