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 switching chamber, a main speed change chamber and an auxiliary speed change chamber, a hydraulic pump and a hydraulic motor are arranged outside the gearbox, a dual-mode power switching assembly is arranged in the gearbox, and switching between a hydraulic driving mode and a mechanical driving mode is achieved through the dual-mode power 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 multi-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 multi-power output can be achieved, idle loss of a hydraulic drive system can be completely eliminated when the hydraulic drive system works in a mechanical drive mode, and the service life of hydraulic components 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 as harvesting equipment with low utilization rates. For example, when harvesting corn, the harvesting season 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 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 as harvesting equipment but also function as a tractor through modular disassembly and bidirectional driving. However, this device lacks instructions on power switching, making it difficult to achieve a smooth and seamless power switching. Furthermore, existing technology makes it difficult to completely stop the hydraulic system during actual power switching, resulting in prolonged idling of the hydraulic pump and reverse-drive rotation of the hydraulic motor, leading to reduced equipment lifespan, high-temperature loss 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 switching chamber, a main transmission chamber, and a secondary transmission chamber. A hydraulic pump and a hydraulic motor are respectively disposed outside the gearbox. A dual-mode power switching component is disposed inside 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 multiple power outputs.

[0007] As a preferred embodiment of this application, the dual-mode power switching assembly includes a hydraulic power input gear, a first meshing sleeve, a first shift fork, and a first meshing gear seat. The first meshing gear seat meshes with the transmission shaft of the hydraulic-mechanical power switching 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 horizontally.

[0008] As a preferred embodiment of this application, the dual-mode power 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 meshes with the drive shaft of the main transmission chamber internally and externally with the second meshing sleeve. The second shift fork is connected to the 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 inside 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 shift fork sleeves and connected to the shift fork shaft. The surface of the shift fork shaft is also provided with a connecting sleeve. The connecting rod is connected to the shift fork shaft through the connecting sleeve, so as to drive the shift fork shaft to move horizontally through the connecting rod, and drive the first and second shift forks to move synchronously.

[0011] In a preferred embodiment of this application, both the hydraulic power input gear and the hydraulic power output gear are double gear structures. The double gear structure includes a large gear and a small gear connected together. 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 hydraulic 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 first engagement tooth seat and the input end of the main transmission chamber drive shaft, and the second engagement sleeve engages only 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. A bevel gear set is provided at the rear output end of the upper transmission member. The bevel gear set is located in the power output transmission chamber and transmits the main power output to both sides. The bevel gear set transmits the main power output to the backup transmission position to provide backup power output. The upper transmission member transmits hydraulic power output upward. 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. A hydraulic power output structure is provided at the top of the power output transfer chamber.

[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 a dual-mode power switching component, enables seamless and free switching between hydraulic drive and mechanical drive of the chassis. Furthermore, through the synchronous operation of 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 transfer chamber and power output transmission chamber enable multiple power outputs, 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 for Figure 1 Side structure diagram Figure 3 This is a cross-sectional structural schematic diagram provided for this application; Figure 4 for Figure 3 A magnified view of a section at point A; Figure 5 This is an overall structural diagram from another perspective of this application; Figure 6 for Figure 5 A schematic diagram of the side structure; Figure 7 This is a cross-sectional structural diagram from another perspective of this application; Figure 8 This is a top view of a portion of the structure of this application; Figure 9 This is a schematic diagram of the combined structure of the pull handle and the third shift fork in this application; Figure 10 This is an overall structural diagram from another perspective of this application; Figure 11 for Figure 10 A magnified view of section B; Figure 12 This is a schematic diagram of the main transmission power input gear shaft of this application; Figure 13 This is a schematic diagram of the structure of the first meshing tooth seat provided in this application; Figure 14 A schematic diagram of the gearbox connection structure in another embodiment 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 switching 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. Connection 211 Shifter head; 22 Shift fork sleeve; 221 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 Auxiliary PTO output shaft; 31 Secondary / Fourth drive switching box; 32 Secondary / Fourth drive switching output shaft; 33 Four-drive transmission shaft; 34 Lubrication assembly; 35 Hydraulic power output structure; 351 Hydraulic power output end; 36 Spare transmission position; 37 Third shift fork; 38 Pull handle. 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 12 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 switching chamber 6, a main transmission chamber 7 and a secondary transmission chamber 8 in sequence. A hydraulic pump 9 and a hydraulic motor 10 are disposed outside the gearbox 5. A dual-mode power switching component is disposed inside the gearbox 5 to achieve switching 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 multiple power outputs.

[0025] The hydraulic pump 9 and the hydraulic motor 10 can be positioned in two different ways. For example, the hydraulic pump 9 and the hydraulic motor 10 can be integrated into one place and set on the top of the gearbox 5, or they can be set on the two sides of the gearbox 5 respectively.

[0026] Specifically, taking the hydraulic pump 9 and hydraulic motor 10 located on top of the gearbox 5 as an example, Figures 1 to 7 This implementation improves the load-bearing capacity of the hydraulic pump 9 and the hydraulic motor 10, and makes reasonable use of space.

[0027] like Figure 1 , Figure 3 and Figure 4 As shown, the dual-mode power 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 switching 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 horizontally.

[0028] Furthermore, the dual-mode power 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.

[0029] Among them, such as Figure 4 , Figure 5 and Figure 6 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 switching chamber 6, and its outer ring is engaged with the inner wall of the first engagement sleeve 12.

[0030] 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 switching 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.

[0031] In a preferred embodiment of this application, a shift fork shaft 19 is provided inside 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.

[0032] Specifically, the shift fork shaft 19 is located inside the gearbox 5 and can pass through the inner wall and partition of the gearbox 5. The inner wall and partition of the gearbox 5 can limit the movement of the shift fork shaft 19, ensuring that the shift fork shaft 19 can only move in the horizontal direction.

[0033] 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 shift fork sleeves 22 and connected to the shift fork shaft 19. The surface of the shift fork shaft is also provided with a connecting sleeve 221. The connecting rod 21 is connected to the shift fork shaft through the connecting sleeve 221, so that the shift fork shaft 19 can be driven to move horizontally through the connecting rod 21, and the first shift fork 13 and the second shift fork 17 can be driven to move synchronously.

[0034] A portion of the connecting rod 21 extends out of the housing for easy connection to the control mechanism inside the driver's cab. The connecting rod 21 inside the housing is equipped with a dial head 211 structure to facilitate the movement of the shift fork shaft 19. A connecting sleeve 221 is provided on the surface of the shift fork shaft 19, and a dial groove is provided on the surface of the connecting sleeve 221. By inserting the dial head 211 into the dial groove, the connecting sleeve 221 is moved horizontally, thereby moving the entire shift fork shaft 19 to realize the movement of the first shift fork 13 and the second shift fork 17.

[0035] In use, the connecting rod 21 can be connected to the control mechanism in the driver's cab via a pull rope or flexible shaft. A gear lever is installed in the driver's cab and connected to the pull rope or flexible shaft. By pushing the gear lever forward and pulling it backward, the shift fork shaft 19 is driven to slide forward and backward. The connecting rod 21 is connected to the gear lever. The top of the first shift fork 13 and the second shift fork 17 are both provided with shift fork sleeves 22. The surface of the shift fork shaft 19 is provided with a connecting sleeve 221. As can be seen from the figure, the upper surface of the connecting sleeve 221 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 and the second shift fork 17 are also fixed to 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.

[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 hydraulic power output gear 15 receives the output power of the hydraulic motor 10 through the idler gear 24.

[0038] like Figure 4 As 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 switching 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] 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 switching 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 output drive power.

[0041] In this example, from Figure 1 and Figure 3 As can be seen, the hydraulic motor 10 and the hydraulic pump 9 are mounted on the same housing, and this housing can be integrated with the gearbox 5. Due to the more compact and centralized structure, the transmission idler wheels 24 of the hydraulic motor 10 and the hydraulic pump 9 can share a single idler wheel shaft, further saving space. In addition, since the gears connected to the outside of the hydraulic pump 9 and the hydraulic motor 10, as well as the two idler wheels 24 below, are on the same vertical axis in this embodiment, the lubrication assembly 34 in this embodiment can be placed at the top of the mounting housing of the hydraulic pump 9 and the hydraulic motor 10, which facilitates spraying lubrication of the connecting structure.

[0042] It is understood that the hydraulic drive mentioned in this application is not simply hydraulic power output, but rather a driving force achieved through the traditional mechanical transmission of the gearbox 5. The dual-mode drive switching in this application is a switching 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] Of course, in addition to the above-mentioned embodiment in which the hydraulic pump 9 and hydraulic motor 10 are located on the top of the gearbox 5 and their mounting housings are integrated with the gearbox 5, the hydraulic pump 9 and hydraulic motor 10 can also be located on both sides of the gearbox 5.

[0044] like Figure 14 As shown, it can be seen that compared with the aforementioned structure in which the hydraulic pump 9 and hydraulic motor 10 are located on the top of the gearbox 5 and integrated with it, the main difference in this embodiment is that the placement of the hydraulic pump 9 and hydraulic motor 10 has been changed in this embodiment, and they are placed on both sides of the gearbox 5. As for the internal connection structure and transmission method, there is not much difference from the scheme in which the hydraulic pump 9 and hydraulic motor 10 are located on the top. Of course, since the hydraulic pump 9 and hydraulic motor 10 are set separately in this embodiment compared with the integrated setting of the aforementioned embodiment, the idler wheel 24 needs to change with the position of the hydraulic pump 9 and hydraulic motor 10 and cannot be placed on the same rotating shaft.

[0045] It is understandable that, regardless of whether the embodiment in which the hydraulic pump 9 and the hydraulic motor 10 are located on top of the gearbox 5, or the embodiment in which the hydraulic pump 9 and the hydraulic motor 10 are located on both sides of the gearbox 5, the core of the solution to be protected in this application is focused on the dual-mode switching of hydraulic machinery.

[0046] 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.

[0047] Specifically, similar to the hydraulic drive solution, if the chassis's drive mode needs to be switched to mechanical drive... In dynamic mode, simply moving the first shift fork 13 backward will 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 switching chamber 6 to be transmitted to the rear gear shaft, and the hydraulic power input gear 11 to drive 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.

[0048] 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.

[0049] As a preferred embodiment of this application, such as Figure 3 and Figure 7 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. A bevel gear set 28 is provided at the rear output end of the upper transmission component 26. The bevel gear set is located in the power output transmission chamber 251 and transmits the main power output to both sides. The bevel gear set transmits the power output to the backup transmission position 36 to provide backup power output. The upper transmission component 26 transmits hydraulic power output upward. 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.

[0050] Regardless of whether hydraulic or mechanical drive is used, the shifting structure of the main transmission chamber 7 and the auxiliary transmission chamber 8 is similar to 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 of the main transmission chamber 7 and the auxiliary transmission chamber 8, which is similar to that in the prior art.

[0051] 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. The upper transmission component 26 is a double gear shaft, and its surface is fitted with a meshing gear seat structure to adapt to the structure of the third shift fork 37. 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.

[0052] 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.

[0053] Understandably, because the lower transmission component 27 is equipped with a meshing sliding sleeve structure, the auxiliary PTO power output can be freely switched on and off. However, the main PTO output shaft 29 is driven by the upper transmission component 26, and the power of the upper transmission component 26 relies on the power output connection shaft of the clutch 4. Therefore, 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, allowing the main PTO output shaft 29 to idle without load.

[0054] Furthermore, such as Figure 6 , Figure 10 and Figure 11 In one alternative embodiment, a hydraulic power output structure 35 can be provided at the front and rear of the top of the power output transfer chamber 25 after the main drive axle 1. Taking the embodiment in which the hydraulic pump 9 and the hydraulic motor 10 are located at the top of the gearbox 5 as an example, installation positions and installation space can be reserved at the front and rear of the top of the power output transfer chamber 25 after the main drive axle 1. When the chassis of this application is used as a harvester chassis, more power output positions may be needed to install power components related to the harvester.

[0055] For example, in this embodiment, a hydraulic power output structure 35 can be installed. As shown in the figure, the hydraulic power output structure 35 adopts a gear pump structure, and similar to the embodiment where the hydraulic pump 9 and hydraulic motor 10 are located on top of the gearbox 5, it is also located on top, above the original upper transmission member 26. Power is transmitted to the upper hydraulic power output end 351 through an idler gear structure similar to the embodiment where the hydraulic pump 9 and hydraulic motor 10 are located on top of the gearbox 5. The hydraulic power output structure 35 is installed at the hydraulic power output end 351. Furthermore, the upper transmission member 26 adopts a combination structure of shaft, double gear, and meshing gear seat (it can be seen that this structure is similar to the aforementioned hydraulic-mechanical dual-mode drive). The power is controlled by the structure of the third shift fork 37. The on / off switching mechanism operates on a similar principle to the first shift fork 13 and the second shift fork 17, therefore a detailed description is omitted here. Above the auxiliary PTO output shaft 29, outside the rear housing of the power output transmission chamber 251, a spare transmission position 36 is provided. This spare transmission position 36 is located behind and connected to the main PTO power output bevel gear set 28. Furthermore, a hydraulic power output on / off control component is installed on the upper transmission member 26. As shown in the figure, the structure and working principle of the hydraulic power output on / off control component are similar to the previous hydraulic-mechanical power switching mechanism. Power on / off control is achieved by moving the third shift fork 37 back and forth. For this on / off control mechanism, a structure similar to the lubrication component 34 can also be used for spray lubrication. Figure 1 and Figure 6 As shown, it can adopt a side-mounted handle 38 structure. By swinging the handle 38 structure, the third shift fork 37 is driven to move back and forth, thereby controlling the on and off of hydraulic power output. When the third shift fork 37 is pushed backward, it is in neutral, similar to the first shift fork. When the third shift fork 37 is pushed forward, it is similar to the first shift fork, driving the meshing sleeve to slide forward, realizing the transmission of power to the upper gear pump, thereby realizing the on and off control of hydraulic power output.

[0056] In other words, from Figure 3 As can be seen, in addition to the conventional main power output that transmits to both sides and the auxiliary power output that transmits to the rear, the hydraulic power output structure 35 set in this embodiment can also add two pump output positions at the top and a spare transmission position 36 located above the auxiliary PTO output shaft 30 at the rear, for a total of six power output positions, to achieve multiple power outputs. It can be understood that by increasing the power output positions of the chassis, this application improves the versatility of the entire chassis, allowing the chassis to adapt to more multi-functional power settings of tractors and harvesters, thereby improving the user experience.

[0057] The transmission and connection of the specific third shift fork 37, engagement sleeve, and engagement tooth seat are roughly the same as the aforementioned power switching method, so this structure will not be described in detail.

[0058] As a preferred embodiment of this application, such as Figure 2 and Figure 3 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.

[0059] Among them, the differential behind the auxiliary transmission chamber 8 provides power to the main drive axle 1 by receiving power from the active bevel gear shaft. The active bevel gear shaft is equipped with an active gear, which can mesh with the driven gear in the two-wheel drive switching box 31, and can realize the two-wheel drive switching 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.

[0060] As can be seen from the figure, the main improvements and innovations of this application are concentrated in the hydraulic mechanical power switching chamber 6, the main transmission chamber 7, the power output transfer chamber 25, and the power output transmission chamber 251. As for the original gearbox 5 inside the harvester chassis and other mechanical transmission parts, this application will not elaborate on them.

[0061] It should be noted that the chassis of this application adopts a multi-power output, the advantage of which is that the main PTO lateral power output and hydraulic power output structure 35 is particularly suitable for harvester power acquisition, and the auxiliary PTO longitudinal power output and hydraulic power output structure 35 is suitable for tractors to be attached to various agricultural implements for operation, so that the chassis can have the functions of a harvester and a tractor, realizing dual-purpose use, which 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 have significant social benefits.

[0062] Furthermore, the chassis structure of this application, as a multi-functional special 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.

[0063] Furthermore, the dual-mode drive of this application allows for the selection of different drive modes as needed. For harvester operations, hydraulic drive is preferred, while mechanical drive is used for road transport. For tractor operations involving 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.

[0064] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0065] 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.

[0066] The above description is merely an embodiment of this application and is not intended to limit 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 principle of this application should be included within the scope of the claims of this application.

Claims

1. A multi-purpose harvester chassis comprising a main drive axle, a steering drive axle and an engine assembly and a clutch disposed therebetween, characterized in that, The chassis further comprises a gearbox arranged behind the clutch, the clutch transmits power to the gearbox through a transmission shaft, the gearbox comprises a hydraulic mechanical power switching chamber, a main transmission chamber and a sub-transmission chamber in sequence, a hydraulic pump and a hydraulic motor are arranged outside the gearbox, a double-mode power switching assembly is arranged inside the gearbox to realize switching between hydraulic drive mode and mechanical drive mode; the chassis further comprises a power output transfer chamber and a power output transmission chamber, which are arranged behind the main drive axle to realize multiple power outputs.

2. A multi-purpose harvester chassis as claimed in claim 1 wherein, The double-mode power switching assembly comprises a hydraulic power input gear, a first meshing sliding sleeve, a first shift fork and a first meshing gear seat, the first meshing gear seat meshes with the transmission shaft of the hydraulic mechanical power switching chamber and meshes with the first meshing sliding sleeve, the first shift fork is connected with the surface groove of the first meshing sliding sleeve to shift the first meshing sliding sleeve to slide horizontally.

3. A multi-purpose harvester chassis as claimed in claim 2 wherein, The double-mode power switching assembly further comprises a hydraulic power output gear, a second meshing sliding sleeve, a second shift fork and a second meshing gear seat, the second meshing gear seat meshes with the transmission shaft of the main transmission chamber and meshes with the second meshing sliding sleeve, the second shift fork is connected with the surface groove of the second meshing sliding sleeve to shift the second meshing sliding sleeve to slide horizontally.

4. A multi-purpose harvester chassis as claimed in claim 3 wherein, The gearbox is internally provided with a shift fork shaft, the first shift fork and the second shift fork are arranged on the shift fork shaft and slide horizontally through the shift fork shaft to drive the first shift fork and the second shift fork to move horizontally synchronously.

5. A multi-purpose harvester chassis as claimed in claim 4 wherein, The harvester chassis further comprises a double-drive switching box, the double-drive switching box comprises a box body, a connecting rod and a spring, the connecting rod is arranged in the box body, the first shift fork and the second shift fork are both provided with a shift fork sleeve and connected with the shift fork shaft, the surface of the shift fork shaft is further provided with a connecting sleeve, the connecting rod is connected with the shift fork shaft through the connecting sleeve to drive the shift fork shaft to move horizontally and drive the first shift fork and the second shift fork to move synchronously.

6. A multi-purpose harvester chassis as claimed in claim 3 wherein, The hydraulic power input gear and the hydraulic power output gear are both double-pinion gear structures, the double-pinion gear structure comprises a large gear and a small gear connected with each other, 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 hydraulic power output gear receives output power of the hydraulic motor through an idler gear.

7. A multi-purpose harvester chassis as claimed in claim 6 wherein, The first shift fork and the second shift fork move towards the clutch, the first meshing sliding sleeve meshes with the small gear of the hydraulic power input gear and the first meshing gear seat, and the second meshing sliding sleeve meshes with the small gear of the hydraulic power output gear and the second meshing gear seat, so that power is realized in hydraulic drive.

8. A multi-purpose harvester chassis as claimed in claim 7, characterised in that, The first shift fork and the second shift fork move towards the main drive axle, the first meshing sliding sleeve meshes with the first meshing gear seat and the input end of the main transmission chamber transmission shaft, and the second meshing sliding sleeve only meshes with the surface of the second meshing gear seat, so that power is realized in mechanical drive.

9. A multi-purpose harvester chassis as claimed in claim 1, wherein, The power output transfer chamber comprises an upper transmission member and a lower transmission member, the rear output end of the upper transmission member is provided with a bevel gear set, the bevel gear set is arranged in the power output transfer chamber and transmits the main power output to both sides, the bevel gear set transmits the backup power output to the backup transmission position in the rear direction, the upper transmission member transmits the hydraulic power output in the upward direction, the lower transmission member is capable of engaging with the upper transmission member and extending through the power output transfer chamber to transmit the secondary power output in the rear direction; The top of the power output transfer chamber is provided with a hydraulic power output structure.

10. A multi-purpose harvester chassis as claimed in claim 1 wherein, The chassis further comprises a two-four-wheel-drive switching box, the two-four-wheel-drive switching box is arranged behind the secondary transmission chamber and at the bottom of the chassis between the secondary transmission chamber and the main drive axle, the two-four-wheel-drive switching box is provided with a two-four-wheel-drive switching sliding sleeve and a two-four-wheel-drive switching output shaft, and a four-wheel-drive transmission shaft is arranged between the two-four-wheel-drive switching box and the steering drive axle to realize two-four-wheel-drive switching through horizontal sliding of the two-four-wheel-drive switching sliding sleeve.

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