Tractor gearbox transmission structure and new energy tractor with same

Abstract

The invention relates to a tractor gearbox transmission structure and a new energy tractor. The tractor gearbox transmission structure comprises a walking motor, a power output motor, a rear axle, a transmission first shaft and a transmission second shaft, the walking motor is connected with the transmission first shaft, the transmission first shaft is connected with the transmission second shaft through a planetary gear transmission mechanism, the transmission second shaft is connected with the rear axle, and the power output motor is connected with a third transmission shaft. The third transmission shaft is provided with a hybrid clutch and is connected with a first shaft of the transmission through the hybrid clutch and the power transmission assembly, the third transmission shaft is further connected with a PTO transmission assembly through a PTO clutch, and the PTO transmission assembly is connected with a PTO transmission shaft. The invention has the advantage that the purpose of flexible use of the walking motor and the power output motor during low-load operation and high-load operation can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tractor power transmission, and in particular to a tractor gearbox transmission structure and a new energy tractor having the same. Background Art

[0002] Tractors are important mechanical equipment in agricultural production. Traditional tractors use engines as power sources. However, engines mainly use diesel or gasoline as energy, which generally emit exhaust gas and cause damage to the environment.

[0003] At present, new energy tractors generally use hybrid power, pure electric power, hydrogen energy, etc., which can minimize environmental pollution. The engine has a small output speed change range and is difficult to start with load, so a gearbox is needed to reduce speed and increase torque, change speed and torque, etc. Because the engine has a large difference between low-speed torque and power and high-speed, tractors need to be designed with many gears, generally more than 8 to 40 gears. This makes the entire tractor's transmission system more complicated and the operation more cumbersome.

[0004] The electric motor has the advantages of large low-speed torque and wide speed regulation range. Therefore, it is necessary to develop a new tractor gearbox transmission structure so that the electric motor can replace the engine as a power source, which becomes one of the development trends. The small gap between the low-speed power and high-speed power of the electric motor can be used to greatly reduce the gears. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a tractor gearbox transmission structure and a new energy tractor having the same, which effectively overcomes the defects of the prior art.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] A tractor gearbox transmission structure comprises a travel motor, a power output motor, a rear axle, a first transmission shaft and a second transmission shaft, wherein the travel motor is connected to the first transmission shaft, the first transmission shaft is connected to the second transmission shaft via a planetary gear transmission mechanism, the second transmission shaft is connected to the rear axle, the power output motor is connected to a third transmission shaft, a hybrid clutch is mounted on the third transmission shaft, and the third transmission shaft is connected to the first transmission shaft via the hybrid clutch and a power transmission assembly, the third transmission shaft is also connected to a PTO transmission assembly via a PTO clutch, and the PTO transmission assembly is connected to the PTO transmission shaft.

[0008] Based on the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the planetary gear transmission mechanism includes a front sun gear, a rear sun gear, a planetary gear carrier, a front inner gear ring and a rear inner gear ring. The front sun gear is rotatably mounted on the first shaft of the transmission, and the rear sun gear is fixedly mounted on the first shaft of the transmission. The planetary gear carrier is sleeved outside the first shaft of the transmission, and one end of the planetary gear carrier is equipped with a front planetary gear meshing with the front sun gear, and the other end of the planetary gear carrier is equipped with a rear planetary gear meshing with the rear sun gear. The front inner gear ring is coaxially fixed on the first shaft of the transmission, and its internal teeth are meshed with the front planetary gears. The rear inner gear ring is coaxially fixed on the second shaft of the transmission, and its internal teeth are meshed with the rear planetary gears. A direct gear clutch is also mounted on the first shaft of the transmission, and the direct gear clutch is connected to the front sun gear.

[0010] Furthermore, the direct gear clutch is provided with a low-speed brake band for braking the direct gear clutch, and the planetary gear carrier is provided with a reverse gear brake band for braking the direct gear clutch.

[0011] Furthermore, the power transmission assembly includes a hybrid first gear and a hybrid second gear meshing with each other, the hybrid first gear is rotatably mounted on the third transmission shaft and connected to the hybrid clutch, and the hybrid second gear is fixedly mounted on the first shaft of the transmission.

[0012] Furthermore, it also includes a lubricating oil power transmission system, and the above-mentioned power transmission component also includes a hybrid third gear, the above-mentioned hybrid third gear is coaxially connected with the above-mentioned hybrid first gear, and the above-mentioned hybrid third gear is transmission-connected to the above-mentioned lubricating oil power transmission system through the gear transmission component.

[0013] Furthermore, the above-mentioned lubricating oil power transmission system includes a lubricating hydraulic pump, a system hydraulic pump and a working hydraulic pump, the above-mentioned gear transmission assembly includes a hydraulic output gear, the main shafts of the above-mentioned lubricating hydraulic pump, the system hydraulic pump and the working hydraulic pump are all coaxially connected, and the above-mentioned hydraulic output gear is installed on the connected main shafts, and the above-mentioned hydraulic output gear is meshed with the above-mentioned hybrid third gear.

[0014] Further, the above-mentioned PTO transmission assembly includes a PTO first shaft, a PTO low-speed driving gear, a PTO low-speed passive gear, a PTO high-speed driving gear, a PTO high-speed passive gear and an engagement sleeve. The above-mentioned PTO first shaft is connected to the above-mentioned PTO clutch, the above-mentioned PTO low-speed driving gear is coaxially and rotatably mounted on the above-mentioned PTO first shaft, the above-mentioned PTO low-speed passive gear is fixedly mounted on the above-mentioned PTO transmission shaft and meshes with the above-mentioned PTO low-speed driving gear, the above-mentioned PTO high-speed driving gear is coaxially and rotatably mounted on the above-mentioned PTO first shaft, the above-mentioned PTO high-speed passive gear is fixedly mounted on the above-mentioned PTO transmission shaft and meshes with the above-mentioned PTO high-speed driving gear, and the above-mentioned engagement sleeve is coaxially and slidably mounted on the above-mentioned PTO first shaft, and can axially slide to selectively engage with the above-mentioned PTO low-speed driving gear and the PTO high-speed driving gear.

[0015] Furthermore, the second shaft of the transmission is connected to a transfer case, an output end of the transfer case is connected to a first transmission shaft, a front axle of the tractor is connected to a second transmission shaft, and the first transmission shaft and the second transmission shaft are connected via a four-wheel drive clutch.

[0016] Furthermore, the transfer case includes a case body and a transfer case driving gear and a transfer case passive gear rotatably mounted in the case body, the transfer case driving gear and the transfer case passive gear are meshed, the transfer case driving gear is coaxially mounted on the first shaft of the transmission, and the transfer case passive gear is coaxially mounted on the shaft end of the first transmission shaft.

[0017] Furthermore, the above-mentioned PTO clutch is a wet clutch.

[0018] The beneficial effects of the present invention are: reasonable structural design, which can achieve the flexible use of the travel motor and the power output motor to work independently according to the working conditions during low-load operation and to combine power through the hybrid clutch during high-load operation.

[0019] A new energy tractor is also provided, comprising a tractor gearbox transmission structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of an embodiment of a tractor gearbox transmission structure of the present invention;

[0021] Figure 2 A structural schematic diagram of another embodiment of the tractor gearbox transmission structure of the present invention

[0022] Figure 3 It is a structural schematic diagram of another embodiment of the tractor gearbox transmission structure of the present invention.

[0023] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0024] 1. Travel motor; 2. Power output motor; 3. Rear axle; 4. Front axle; 5. Transmission first shaft; 6. Transmission second shaft; 7. Four-wheel drive clutch; 8. Hybrid clutch; 9. PTO clutch; 10. PTO drive shaft; 30. Direct gear clutch; 40. Low gear brake belt; 50. Reverse gear brake belt; 201. Front sun gear; 202. Rear sun gear; 203. Planetary gear carrier; 204. Front inner gear ring; 205. Rear inner gear ring; 601. Hybrid first Gear 1; 602, hybrid second gear; 603, hybrid third gear; 701, PTO first shaft; 702, PTO low-speed driving gear; 703, PTO low-speed passive gear; 704, PTO high-speed driving gear; 705, PTO high-speed passive gear; 706, meshing sleeve; 801, lubrication hydraulic pump; 802, system hydraulic pump; 803, working hydraulic pump; 804, hydraulic output gear; 901, transfer case driving gear; 902, transfer case passive gear. DETAILED DESCRIPTION

[0025] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0026] Example 1

[0027] like Figure 1 As shown, the transmission structure of the tractor gearbox of this embodiment includes a travel motor 1, a power output motor 2, a rear axle 3, a first transmission shaft 5 and a second transmission shaft 6. The travel motor 1 is connected to the first transmission shaft 5, the first transmission shaft 5 is connected to the second transmission shaft 6 through a planetary gear transmission mechanism, the second transmission shaft 6 is connected to the rear axle 3, the power output motor 2 is connected to the third transmission shaft, a hybrid clutch 8 is installed on the third transmission shaft, and the third transmission shaft is connected to the first transmission shaft 5 through the hybrid clutch 8 and the power transmission assembly, the third transmission shaft is also connected to the PTO transmission assembly through a PTO clutch 9, and the PTO transmission assembly is connected to the PTO transmission shaft 10.

[0028] The transmission structure of the tractor gearbox of this embodiment has two motors for traveling and power output. When operating normally, the traveling motor 1 is used for traveling. The other motor (i.e., the power output motor 2) is used for PTO (POWER TAKE-OFF) power. When under high load conditions, dual motor confluence and high power output can be achieved. When operating purely for traction, only the traveling motor 1 is in operation, and the power output motor 2 and the transmission system are not in operation. When operating purely for PTO, only the power output motor 2 is in operation. Thus, the effect of saving energy consumption is achieved. The transmission structure adopts a planetary gear transmission mechanism, which has the characteristics of smooth transmission and large speed ratio.

[0029] In this embodiment, the planetary gear transmission mechanism includes a front row sun gear 201, a rear row sun gear 202, a planetary gear carrier 203, a front row inner gear ring 204 and a rear row inner gear ring 205. The front row sun gear 201 is rotatably mounted on the first transmission shaft 5, the rear row sun gear 202 is fixedly mounted on the first transmission shaft 5, the planetary gear carrier 203 is sleeved outside the first transmission shaft 5, and one end of the planetary gear carrier 203 is equipped with a front row sun gear 201 meshing with the front row sun gear 201. The star gear a has its other end equipped with a rear planetary gear b meshing with the above-mentioned rear sun gear 202. The above-mentioned front inner ring gear 204 is coaxially fixed on the above-mentioned first shaft 5 of the transmission, and its internal teeth are meshed with the above-mentioned front planetary gears. The above-mentioned rear inner ring gear 205 is coaxially fixed on the above-mentioned second shaft 6 of the transmission, and its internal teeth are meshed with the above-mentioned rear planetary gears. A direct gear clutch 30 is also installed on the above-mentioned first shaft 5 of the transmission, and the above-mentioned direct gear clutch 30 is connected to the above-mentioned front sun gear 201.

[0030] More specifically, a low-speed brake band 40 for braking the direct-shift clutch 30 is provided, and a reverse-speed brake band 50 for braking the planetary gear carrier 203 is provided.

[0031] Specifically during the operation, the transmission routes of each gear are as follows:

[0032] ① Neutral

[0033] The direct gear clutch 30 is in a disengaged state, and the low gear brake band 40 and the reverse gear brake band 50 are all in a non-braking state. At this moment, each basic component in the planetary gear transmission mechanism can rotate freely, so the planetary gear transmission mechanism cannot transmit power and is in a neutral state.

[0034] ②Low speed gear

[0035] The direct gear clutch 30 is in a disengaged state, the low gear brake belt 40 is braked, and the reverse gear brake belt 50 is relaxed, so that the front sun gear 201 is fixed, and the power of the travel motor 1 is transmitted in two parts: one part is transmitted from the front inner ring 204 to the rear planetary gear b through the planetary gear carrier 203, and the other part is transmitted to the rear planetary gear b through the rear sun gear 202. After the two parts of power are combined into one, they are transmitted to the second transmission shaft 6 through the rear inner ring 205, and the second transmission shaft 6 transmits the power to the rear axle 3.

[0036] It should be noted that: under the condition of having a four-wheel drive clutch 7 and a transfer case, the second transmission shaft 6 can transmit part of the power to the rear axle 3, and the other part to the front axle 4 through the transfer case, the first transmission shaft, the four-wheel drive clutch 7, and the second transmission shaft.

[0037] ③High gear

[0038] The direct gear clutch 30 is in the engaged state, the low gear brake band 40 and the reverse gear brake band 50 are both in the relaxed state, the front sun gear 201 and the front inner gear ring 204 are connected to the first transmission shaft 5 as a whole, and because the planetary gear carrier 203 is shared by the front and rear rows of planetary gears, the second transmission shaft 6 and the rear inner gear ring 205 are connected as a whole, so the first transmission shaft 5 and the second transmission shaft 6 are integrated into one, so the transmission ratio is 1. The second transmission shaft 6 transmits power to the rear axle 3.

[0039] It should be noted that: under the condition of having a four-wheel drive clutch 7 and a transfer case, the second transmission shaft 6 can transmit part of the power to the rear axle 3, and transmit the other part of the power to the front axle 4 through the transfer case, the first transmission shaft, the four-wheel drive clutch 7, and the second transmission shaft.

[0040] ④Reverse gear

[0041] The reverse gear brake band 50 is in a braking state, the planetary gear carrier 203 is fixed, the low gear brake band 40 is loosened, and the direct gear clutch 30 is disengaged. It can be seen that the front sun gear 201 can rotate freely. After the power is transmitted from the first transmission shaft 5 to the rear sun gear 202, it is output through the rear inner gear ring 205, and the rotation direction of the rear inner gear ring 205 is opposite to that of the rear sun gear 202, that is, reverse gear operation is realized. The second transmission shaft 6 transmits the power to the rear axle 3.

[0042] It should be noted that: under the condition of having a four-wheel drive clutch 7 and a transfer case, the second transmission shaft 6 can transmit part of the power to the rear axle 3, and transmit the other part of the power to the front axle 4 through the transfer case, the first transmission shaft, the four-wheel drive clutch 7, and the second transmission shaft.

[0043] When a PTO (power take-off) action is required, the power take-off motor 2 is operated, the PTO clutch 9 is engaged, and the power is transmitted through the PTO transmission assembly to the PTO transmission shaft 10 .

[0044] In the vehicle system, because a hybrid clutch 8 is designed, when the hybrid clutch 8 is engaged, the power of the travel motor 1 and the power output motor 2 are combined through the power transmission component to cope with ultra-large load conditions.

[0045] As a preferred embodiment, the power transmission assembly includes a hybrid first gear 601 and a hybrid second gear 602 that are meshed with each other. The hybrid first gear 601 is rotatably mounted on the third transmission shaft and connected to the hybrid clutch 8. The hybrid second gear 602 is fixedly mounted on the transmission first shaft 5.

[0046] In the above implementation, when the hybrid clutch 8 is engaged, the power of the travel motor 1 and the power output motor 2 are combined through the hybrid first gear 601 and the hybrid second gear 602, and the design is relatively simple and ingenious.

[0047] As a preferred embodiment, Figure 3 As shown, it also includes a lubricating oil power transmission system, and the above-mentioned power transmission component also includes a hybrid third gear 603, the above-mentioned hybrid third gear 603 is coaxially connected with the above-mentioned hybrid first gear 601, and the above-mentioned hybrid third gear 603 is connected to the above-mentioned lubricating oil power transmission system through the gear transmission component.

[0048] In the above implementation scheme, through the design of the power transmission component, when the walking motor 1 is running, the power can be transmitted to the lubricating oil power transmission system through the hybrid first gear 601, the hybrid second gear 602, and the hybrid third gear 603, so that the lubricating oil power transmission system is driven to run and the output of the lubricating hydraulic oil of the whole machine is realized. This design combines the lubrication system with the transmission structure, and the linkage is better.

[0049] As a preferred embodiment, the lubricating oil power transmission system includes a lubricating hydraulic pump 801, a system hydraulic pump 802 and a working hydraulic pump 803, the gear transmission assembly includes a hydraulic output gear 804, the main shafts of the lubricating hydraulic pump 801, the system hydraulic pump 802 and the working hydraulic pump 803 are coaxially connected, and the hydraulic output gear 804 is installed on the connected main shafts, and the hydraulic output gear 804 is meshed with the hybrid third gear 603.

[0050] In the above implementation scheme, when the walking motor 1 is in operation, the power can be transmitted to the hybrid third gear 603 through the hybrid first gear 601 and the hybrid second gear 602, thereby transmitting the hydraulic output gear 804. The hydraulic output gear 804 drives the lubrication hydraulic pump 801, the system hydraulic pump 802 and the working hydraulic pump 803 to operate respectively, which can provide the whole machine lubrication hydraulic oil, the system adjustment hydraulic oil and the working device control hydraulic oil (such as a three-point suspension system) and the multi-way valve hydraulic output.

[0051] As a preferred embodiment, the PTO transmission assembly includes a PTO first shaft 701, a PTO low-speed driving gear 702, a PTO low-speed passive gear 703, a PTO high-speed driving gear 704, a PTO high-speed passive gear 705 and a meshing sleeve 706. The PTO first shaft 701 is connected to the PTO clutch 9, the PTO low-speed driving gear 702 is coaxially rotatably mounted on the PTO first shaft 701, and the PTO low-speed passive gear 703 is fixedly mounted on the PTO transmission. The PTO high-speed driving gear 704 is coaxially and rotatably mounted on the PTO first shaft 701. The PTO high-speed passive gear 705 is fixedly mounted on the PTO transmission shaft 10 and meshes with the PTO high-speed driving gear 704. The engaging sleeve 706 is coaxially and slidably mounted on the PTO first shaft 701 and can slide axially to selectively engage with the PTO low-speed driving gear 702 and the PTO high-speed driving gear 704.

[0052] In the above implementation scheme, when PTO (power take-off) action is required, the power output motor 2 is operated, the PTO clutch 9 is engaged, and the power is transmitted to the PTO transmission shaft 10 through the transmission action of the PTO low-speed driving gear 702, the PTO low-speed passive gear 703, the PTO high-speed driving gear 704, and the PTO high-speed passive gear 705. The high and low speed gears (of the PTO transmission shaft 10) can be adjusted by the axial sliding of the engagement sleeve 706. The design is relatively reasonable and the gear adjustment is smooth.

[0053] As a preferred embodiment, Figure 2 As shown, the second transmission shaft 6 is connected to the transfer case, the output end of the transfer case is connected to the first transmission shaft, the front axle 4 of the tractor is connected to the second transmission shaft, and the first transmission shaft and the second transmission shaft are connected via a four-wheel drive clutch 7.

[0054] In the above embodiment, the design of the four-wheel drive clutch 7 and the transfer case can realize the purpose of transmitting the transmission power to the rear axle 3 and the front axle 4. The whole vehicle can disconnect and connect the power transmitted to the front axle 4 through the four-wheel drive clutch 7, thereby realizing the two-wheel drive and four-wheel drive of the whole vehicle. Specifically, when the four-wheel drive clutch 7 is engaged, the power can be switched to the four-wheel drive, and when the four-wheel drive clutch 7 is disengaged, the rear-wheel drive mode is realized.

[0055] In this embodiment, the transfer case includes a case body and a transfer case driving gear 901 and a transfer case driven gear 902 rotatably mounted in the case body, the transfer case driving gear 901 and the transfer case driven gear 902 are meshed, the transfer case driving gear 901 is coaxially mounted on the first transmission shaft 5, and the transfer case driven gear 902 is coaxially mounted on the shaft end of the first transmission shaft.

[0056] In this embodiment, the PTO clutch 9 is a wet clutch of an adapted type.

[0057] Compared with the traditional tractor transmission system or the new energy transmission system, the tractor gearbox transmission structure of this embodiment has the characteristics of low emission pollution and low unit operation time cost. Through the special gearbox structure design, the travel motor and the power output motor can work separately according to the working conditions when working under low load, and when working under high load, the hybrid clutch can be used to achieve the purpose of power merging.

[0058] Example 2

[0059] The new energy tractor of this embodiment includes the tractor gearbox transmission structure of embodiment 1.

[0060] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A tractor gearbox transmission structure, characterized in that: The invention comprises a travel motor (1), a power output motor (2), a rear axle (3), a first transmission shaft (5) and a second transmission shaft (6), wherein the travel motor (1) is connected to the first transmission shaft (5), the first transmission shaft (5) is connected to the second transmission shaft (6) via a planetary gear transmission mechanism, the second transmission shaft (6) is connected to the rear axle (3), the power output motor (2) is connected to a third transmission shaft, a hybrid clutch (8) is mounted on the third transmission shaft, and the third transmission shaft is connected to the first transmission shaft (5) via the hybrid clutch (8) and a power transmission assembly, the third transmission shaft is also connected to a PTO transmission assembly via a PTO clutch (9), and the PTO transmission assembly is connected to a PTO transmission shaft (10).

2. A tractor gearbox transmission structure according to claim 1, characterized in that: The planetary gear transmission mechanism comprises a front row sun gear (201), a rear row sun gear (202), a planetary gear carrier (203), a front row inner gear ring (204) and a rear row inner gear ring (205); the front row sun gear (201) is rotatably mounted on the first shaft (5) of the transmission; the rear row sun gear (202) is fixedly mounted on the first shaft (5) of the transmission; the planetary gear carrier (203) is sleeved outside the first shaft (5) of the transmission and one end of the planetary gear carrier is equipped with a front row sun gear (201) meshing with the front row sun gear (201). The planetary gear has a rear-row planetary gear meshed with the rear-row sun gear (202) at the other end thereof; the front-row inner gear ring (204) is coaxially fixed on the first shaft (5) of the transmission, and its internal teeth are meshed with the front-row planetary gear; the rear-row inner gear ring (205) is coaxially fixed on the second shaft (6) of the transmission, and its internal teeth are meshed with the rear-row planetary gear; the first shaft (5) of the transmission is also equipped with a direct gear clutch (30), and the direct gear clutch (30) is connected to the front-row sun gear (201).

3. A tractor gearbox transmission structure according to claim 2, characterized in that: The direct gear clutch (30) is provided with a low gear brake band (40) for braking the direct gear clutch, and the planetary gear carrier (203) is provided with a reverse gear brake band (50) for braking the direct gear clutch.

4. A tractor gearbox transmission structure according to claim 1, characterized in that: The power transmission assembly comprises a hybrid first gear (601) and a hybrid second gear (602) meshing with each other, wherein the hybrid first gear (601) is rotatably mounted on the third transmission shaft and connected to the hybrid clutch (8), and the hybrid second gear (602) is fixedly mounted on the transmission first shaft (5).

5. A tractor gearbox transmission structure according to claim 4, characterized in that: It also includes a lubricating oil power transmission system, and the power transmission component also includes a hybrid third gear (603), the hybrid third gear (603) is coaxially connected to the hybrid first gear (601), and the hybrid third gear (603) is connected to the lubricating oil power transmission system through the gear transmission component.

6. A tractor gearbox transmission structure according to claim 5, characterized in that: The lubricating oil power transmission system comprises a lubricating hydraulic pump (801), a system hydraulic pump (802) and a working hydraulic pump (803); the gear transmission assembly comprises a hydraulic output gear (804); the main shafts of the lubricating hydraulic pump (801), the system hydraulic pump (802) and the working hydraulic pump (803) are coaxially connected, and the hydraulic output gear (804) is installed on the connected main shafts; the hydraulic output gear (804) is meshed with the hybrid third gear (603).

7. A tractor gearbox transmission structure according to claim 1, characterized in that: The PTO transmission assembly comprises a PTO first shaft (701), a PTO low-speed driving gear (702), a PTO low-speed passive gear (703), a PTO high-speed driving gear (704), a PTO high-speed passive gear (705) and a meshing sleeve (706), wherein the PTO first shaft (701) is connected to the PTO clutch (9), the PTO low-speed driving gear (702) is coaxially rotatably mounted on the PTO first shaft (701), and the PTO low-speed passive gear (703) is fixedly mounted on the PTO transmission shaft (10). The PTO high-speed driving gear (704) is coaxially and rotatably mounted on the PTO first shaft (701), and meshes with the PTO low-speed driving gear (702). The PTO high-speed driving gear (704) is coaxially and rotatably mounted on the PTO first shaft (701). The PTO high-speed passive gear (705) is fixedly mounted on the PTO transmission shaft (10) and meshes with the PTO high-speed driving gear (704). The engagement sleeve (706) is coaxially and slidably mounted on the PTO first shaft (701), and can slide axially to selectively engage with the PTO low-speed driving gear (702) and the PTO high-speed driving gear (704).

8. A tractor gearbox transmission structure according to any one of claims 1 to 7, characterized in that: The second transmission shaft (6) is connected to a transfer case, the output end of the transfer case is connected to a first transmission shaft, the front axle (4) of the tractor is connected to a second transmission shaft, and the first transmission shaft and the second transmission shaft are connected via a four-wheel drive clutch (7).

9. A tractor gearbox transmission structure according to claim 8, characterized in that: The transfer case comprises a case body and a transfer case driving gear (901) and a transfer case driven gear (902) rotatably mounted in the case body. The transfer case driving gear (901) and the transfer case driven gear (902) are meshed. The transfer case driving gear (901) is coaxially mounted on the first shaft (5) of the transmission, and the transfer case driven gear (902) is coaxially mounted on the shaft end of the first transmission shaft.

10. A new energy tractor, characterized in that: It comprises a tractor gearbox transmission structure as claimed in any one of claims 1 to 9.

Images