Special-purpose electric tractor

Abstract

The application relates to the field of agricultural machinery technology, in particular to a special electric tractor, which comprises a power battery, a PTO motor, a PTO reduction gear box, a walking motor, a walking reduction gear box and a rear axle, the PTO motor is connected with the PTO reduction gear box and is used for driving a stirring mechanism of a feed mixer to stir materials, the walking motor is connected with the rear axle through the walking reduction gear box and is used for driving the rear axle to drive wheels together with a vehicle body to walk, and the vehicle body is used for synchronously driving the feed mixer to walk, the power battery is electrically connected with the PTO motor and the walking motor and is used for supplying power for the PTO motor and the walking motor. The application adopts a multi-motor route, realizes independent control of walking and PTO power output, achieves power decoupling, cancels the gear arrangement and the gear shifting mechanism of the walking system and the PTO system, fully utilizes the characteristics of a wide rotating speed range of the motor, and meets the working conditions of the feed mixer in a cattle farm.

Description

Technical Field

[0001] This application relates to the field of agricultural machinery technology, and in particular to a special-purpose electric tractor. Background Technology

[0002] Tractors are the main power machinery in dairy and beef cattle farms. Cattle farms use tractors to drive TMR feed mixers. However, the tractors currently used in farms are all traditional diesel engine tractors. They use a diesel engine matched with a multi-speed gearbox, and the travel and PTO cannot be decoupled. Frequent gear shifting is required to achieve different operating speeds and conditions. This makes the operation cumbersome for drivers, results in low work efficiency, and diesel engine tractors have the problem of high emissions pollution. Utility Model Content

[0003] The purpose of this application is to provide a special-purpose electric tractor that, to a certain extent, solves the technical problems existing in the prior art where diesel tractors drive TMR feed mixers, using a diesel engine matched with a multi-speed gearbox, where the travel and PTO cannot be decoupled, requiring frequent gear shifting to achieve different working speeds, resulting in cumbersome operation for the driver, low work efficiency, and significant emissions pollution from diesel tractors.

[0004] This application provides a special-purpose electric tractor, including: a power battery, a PTO motor, a PTO reduction gearbox, a travel motor, a travel reduction gearbox, and a rear axle; wherein, the output end of the PTO motor is connected to the input end of the PTO reduction gearbox, and the output end of the PTO reduction gearbox is used to connect to the mixing mechanism of a feed mixer and to drive the mixing mechanism of the feed mixer to mix materials; The output end of the walking motor is connected to the input end of the walking reduction gearbox, and the output end of the walking reduction gearbox is connected to the rear axle and is used to drive the rear axle to drive the rear wheels to move, so that the whole vehicle moves. The whole vehicle is used to synchronously drive the feed mixer to move at a preset speed. The power battery is electrically connected to the PTO motor and the walking motor and is used to supply power to the PTO motor and the walking motor.

[0005] In the above technical solution, the special-purpose electric tractor further includes a hydraulic motor and a hydraulic pump; wherein the hydraulic pump is connected to the hydraulic motor, and the hydraulic motor is used to drive the hydraulic pump to work; the power battery is electrically connected to the hydraulic motor and is used to supply power to the hydraulic motor.

[0006] In any of the above technical solutions, the special-purpose electric tractor further includes a main control device, which includes an integrated PTO motor controller, a travel motor controller, and a hydraulic motor controller. The PTO motor controller is communicatively connected to the PTO motor; the travel motor controller is communicatively connected to the travel motor; and the hydraulic motor controller is communicatively connected to the hydraulic motor.

[0007] In any of the above technical solutions, the special-purpose electric tractor further includes a BDU battery disconnect module and a PDU high-voltage power distribution module; wherein, the PDU high-voltage power distribution module is electrically connected to the power battery through the BDU battery disconnect module, and the PTO motor, the travel motor and the hydraulic motor are respectively electrically connected to the PDU high-voltage power distribution module.

[0008] In any of the above technical solutions, the special-purpose electric tractor further includes a DC-DC converter module and low-voltage electrical equipment; wherein the DC-DC converter module is electrically connected to the power battery through the BDU battery disconnect module, and the low-voltage electrical equipment is electrically connected to the DC-DC converter module.

[0009] In any of the above technical solutions, the BDU battery circuit breaker module, the PDU high-voltage power distribution module, the DC-DC converter module, the PTO motor controller, the walking motor controller, and the hydraulic motor controller are further integrated together.

[0010] In any of the above technical solutions, the special-purpose electric tractor further includes a thermal management unit, which is used to heat or cool the power battery, the PTO motor, the travel motor, the hydraulic motor, and the main control device; the PDU high-voltage power distribution module is electrically connected to the thermal management unit.

[0011] In any of the above technical solutions, the thermal management unit is further installed on the outer side wall of the chassis.

[0012] In any of the above technical solutions, the speed of the special-purpose electric tractor is v, and 20km / h≤v≤30km / h.

[0013] In any of the above technical solutions, the output speed of the PTO reduction gearbox is n, and 0≤n≤1000rpm.

[0014] In any of the above technical solutions, the PTO reduction gearbox does not include a shifting structure.

[0015] In any of the above technical solutions, the walking reduction gearbox does not include a shifting structure.

[0016] In any of the above technical solutions, the special-purpose electric tractor further includes a hood, a front axle bracket, a front fixing member, a first rear fixing member, a second rear fixing member, and a connecting member; wherein the power battery is placed on the front axle bracket and located inside the hood; One end of the power battery is connected to the hood via a front fixing member, and the other end of the power battery is connected to the hood via a first rear fixing member and a second rear fixing member; one end of the connecting member is connected to the front axle bracket, and the other end of the connecting member is connected to the PTO reduction gearbox.

[0017] In any of the above technical solutions, the front fixing member is further arranged in a Z-shape, and one side of the front fixing member is connected to the front end of the hood, while the other side of the front fixing member is connected to the front end of the power battery.

[0018] In any of the above technical solutions, the first rear fixing member is U-shaped and is fastened to the top of the power battery, and the opposite side walls of the first rear fixing member are connected to the opposite side portions of the power battery, and the top of the first rear fixing member is connected to the bottom of the second rear fixing member.

[0019] In any of the above technical solutions, the second rear fixing member is further arranged in a Z-shape, and the top of the second rear fixing member is connected to the top of the machine cover, and the bottom of the second rear fixing member is connected to the top of the first rear fixing member.

[0020] In any of the above technical solutions, the front fixing member is further detachably connected to the power battery and the hood via fastening components.

[0021] In any of the above technical solutions, the first rear fixing member is detachably connected to the power battery and the second rear fixing member through fastening components.

[0022] In any of the above technical solutions, the second rear fixing member is further detachably connected to the machine cover by a fastening member.

[0023] In any of the above technical solutions, the connecting member is further detachably connected to the front axle bracket and the PTO reduction gearbox via fastening members.

[0024] Compared with the prior art, the beneficial effects of this application are as follows: This application provides a novel electric tractor suitable for use in conjunction with a TMR feed mixer in a livestock farm. Compared to traditional fuel-powered tractors, this electric tractor has a simpler structure and adopts independent travel motors and PTO motors, i.e., it adopts a multi-motor route, thereby solving the problem of coupling between travel and PTO power output, realizing independent control of travel and PTO power output, achieving power decoupling, and eliminating the need for frequent gear shifting, simplifying operation, improving work efficiency, and using electric motors as power sources, resulting in lower overall noise and vibration compared to transmission fuel diesel engine models, making it more suitable for operation in cattle farm environments.

[0025] Moreover, dedicated electric tractors emit no exhaust fumes during operation, thus avoiding air pollution, reducing odors and harmful gases in the breeding environment, and lowering the health risks for operators. Furthermore, electric tractors are powered by electric motors, and their noise level is much lower than that of traditional fuel-powered tractors, with less vibration. This reduces disturbance to cattle in areas such as barns and feed areas, lowers the risk of stress reactions, and indirectly protects the growth status and milk production efficiency of the cattle.

[0026] The gear arrangement and shifting mechanism of the walking system and PTO system have been eliminated, making full use of the wide speed range of the motor to meet the operating conditions of the TMR feed mixer in cattle farms. This makes the structure of this special electric tractor simpler, the cost lower, and the reliability higher. It does not require gear shifting and is easy to operate.

[0027] The thermal management unit, located on the side of the tractor, provides cooling and heating for the power battery, as well as cooling for the motor and multi-function controller, and heating and cooling for the cab. Furthermore, by fixing the thermal management unit to the outer wall of the chassis, the structure is more compact, reducing cooling pipes and increasing the internal space of the hood, allowing for the installation of power batteries with larger capacities.

[0028] The system adopts an integrated multi-controller solution, which includes a PTO motor controller, a walking motor controller, a hydraulic motor controller, a DC-DC converter, and a PDU power distribution box. The structure is compact, which simplifies the structure of the new energy three-electric system, reduces the layout of high-voltage lines, and reduces the complexity and weight of the new energy three-electric system, making it more compact.

[0029] Furthermore, by integrating the power battery into the hood to form a power battery-hood assembly, and then fixing the assembled sub-assembly onto the front axle bracket, no further assembly is required, saving time and effort. This eliminates the need for redundant opening and closing mechanisms designed to install the power battery within the vehicle's hood, resulting in a simpler structure, reduced parts, lower costs, fewer assembly steps, reduced labor costs, and no wear and tear on moving parts, thus reducing the failure rate. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 A schematic diagram of a special-purpose electric tractor provided in the embodiments of this application; Figure 2 A partial structural schematic diagram of a special-purpose electric tractor provided in an embodiment of this application; Figure 3 This is another partial structural schematic diagram of a special-purpose electric tractor provided in an embodiment of this application.

[0032] Figure label: 1-Power battery, 2-BDU battery circuit breaker module, 3-Main control unit, 4-PTO motor, 5-PTO reduction gearbox, 6-Walking motor, 7-Walking reduction gearbox, 8-Rear axle, 9-Rear wheel, 10-Hydraulic motor, 11-Hydraulic pump, 12-Thermal management unit, 13-Low voltage electrical equipment, 14-Hood, 15-Front axle bracket, 16-Front fixing component, 17-First rear fixing component, 18-Second rear fixing component, 19-Connecting component, 20-TMR feed mixer. Detailed Implementation

[0033] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0034] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0035] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0036] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] The following reference Figure 1 This application describes a special-purpose electric tractor according to some embodiments.

[0039] See Figure 1 As shown, an embodiment of this application provides a special-purpose electric tractor, including: a power battery 1, a PTO motor 4, a PTO reduction gearbox 5, a travel motor 6, a travel reduction gearbox 7, and a rear axle 8; wherein, the output end of the PTO motor 4 is connected to the input end of the PTO reduction gearbox 5, and the output end of the PTO reduction gearbox 5 is used to connect to the mixing mechanism of a feed mixer, such as a TMR feed mixer 20, and is used to drive the mixing mechanism of the TMR feed mixer 20 to mix the materials; The output end of the walking motor 6 is connected to the input end of the walking reduction gearbox 7. The output end of the walking reduction gearbox 7 is connected to the rear axle 8 and is used to drive the rear axle 8 to drive the rear wheels 9 to move, so that the whole vehicle can move. The whole vehicle is used to synchronously drive the TMR feed mixer 20 to move at a preset speed. The power battery 1 is electrically connected to the PTO motor 4 and the walking motor 6 and is used to supply power to the PTO motor 4 and the walking motor 6.

[0040] As can be seen from the structure described above, this application provides a new type of electric tractor suitable for use in conjunction with a TMR feed mixer 20 in a livestock farm. Compared with traditional fuel tractors, this electric tractor has a simpler structure and adopts independent walking motor 6 and PTO motor 4, that is, it adopts a multi-motor route, thereby solving the problem of coupling between walking and PTO power output, realizing independent control of walking and PTO power output, achieving power decoupling, and eliminating the need for frequent gear shifting, simplifying operation, improving work efficiency, and using electric motors as power, resulting in lower overall noise and vibration compared to transmission fuel diesel engine models, making it more suitable for operation in cattle farm environments. It should be noted that the power battery 1, as the energy storage module of the tractor, can be a single battery pack solution or a group solution of multiple battery packs; the travel motor 6 is decelerated and torque-increased through the travel reduction gearbox 7, and then outputs power to the rear axle 8 through the drive shaft, which then drives the rear wheels to move, and in turn drives the front wheels to move, thereby realizing the movement of the whole vehicle.

[0041] In addition, it should be noted that the special-purpose electric tractor provided in this application can also be used with other types of feed mixing equipment or feed feeding equipment, etc.

[0042] In this embodiment, preferably, as follows: Figure 1 As shown, the special-purpose electric tractor also includes a hydraulic motor 10 and a hydraulic pump 11; wherein, the hydraulic pump 11 is connected to the hydraulic motor 10, and the hydraulic motor 10 is used to drive the hydraulic pump 11 to work; the power battery 1 is electrically connected to the hydraulic motor 10 and is used to supply power to the hydraulic motor 10. As can be seen from the structure described above, the hydraulic motor 10 drives the hydraulic pump 11 to provide power to the hydraulic system; the hydraulic pump 11 provides power to the hydraulic system for vehicle hydraulic power steering, hydraulic multi-way valve output, various control valve groups, etc. In this embodiment, preferably, as follows: Figure 1 As shown, the special-purpose electric tractor also includes a main control device 3, which includes an integrated PTO motor controller, a travel motor controller, and a hydraulic motor controller. The PTO motor controller is communicatively connected to the PTO motor 4; the travel motor controller is communicatively connected to the travel motor 6; and the hydraulic motor controller is communicatively connected to the hydraulic motor 10. As can be seen from the structure described above, the main control device 3 adopts an integrated solution, which includes a PTO motor controller, a travel motor controller, and a hydraulic motor controller. It has a higher degree of integration and is more convenient for unified maintenance. Among them, the PTO motor controller and the travel motor controller are motor controllers, which mainly realize the control of motor rotation, speed, torque and other functions.

[0043] In this embodiment, preferably, the special-purpose electric tractor also includes a BDU battery disconnect module 2 and a PDU high-voltage power distribution module (not shown in the figure); wherein, the PDU high-voltage power distribution module is electrically connected to the power battery 1 through the BDU battery disconnect module 2, and the PTO motor 4, the travel motor 6 and the hydraulic motor 10 are respectively electrically connected to the PDU high-voltage power distribution module. As can be seen from the structure described above, the BDU battery circuit breaker module 2 can realize the energy cut-off unit of the high-voltage power battery 1 and realize the charging and discharging switch of the power battery 1; the function of the PDU high-voltage power distribution module is to obtain high-voltage DC power from the vehicle energy storage device and distribute the power to various high-voltage electrical equipment such as the motor and the thermal management unit 12 described below through the internal control and protection circuit (contactor, fuse, etc.).

[0044] In this embodiment, preferably, the special-purpose electric tractor also includes a DC-DC converter module and a low-voltage electrical device 13 (the DC-DC converter module is not shown in the figure); wherein, the DC-DC converter module is electrically connected to the power battery 1 through the BDU battery disconnect module 2, and the low-voltage electrical device 13 is electrically connected to the DC-DC converter module.

[0045] As can be seen from the structure described above, the DC-DC converter mainly converts electrical energy of one DC voltage value into electrical energy of another DC voltage value, providing the required voltage for low-voltage electrical equipment 13.

[0046] Furthermore, preferably, the low-voltage electrical equipment 13 includes low-voltage batteries, low-voltage control circuits, lights, horns, audio equipment, and other low-voltage electrical components, which are existing equipment on tractors and will not be described in detail here.

[0047] In this embodiment, preferably, as follows: Figure 1 As shown, the BDU battery disconnect module 2, PDU high-voltage power distribution module, DC-DC converter module, PTO motor controller, travel motor controller, and hydraulic motor controller are integrated together, resulting in higher integration and easier unified maintenance. Of course, this is not the only feature.

[0048] Furthermore, preferably, a unified box or bracket can be used to fix the aforementioned BDU battery circuit breaker module 2, PDU high-voltage power distribution module, DC-DC converter module, PTO motor controller, walking motor controller, and hydraulic motor controller onto the box or bracket, depending on actual needs.

[0049] In this embodiment, preferably, as follows: Figure 1As shown, the special-purpose electric tractor also includes a thermal management unit 12, which is used to heat or cool the power battery 1, PTO motor 4, travel motor 6, hydraulic motor 10 and main control device 3; the PDU high-voltage power distribution module is electrically connected to the thermal management unit 12.

[0050] Based on the structure described above, it can be seen that the temperature of components such as the battery, motor and multi-function controller is controlled by liquid cooling, air cooling and other methods to prevent overheating or uneven temperature, and it also has heating and cooling functions in the cab.

[0051] Furthermore, preferably, the thermal management unit 12 is installed on the outer wall of the cab, which has a compact structure, reduces cooling pipes, and increases the internal space of the hood, allowing for the placement of a power battery 1 with a larger capacity.

[0052] In this embodiment, preferably, the speed of the special-purpose electric tractor is v, and 20km / h≤v≤30km / h. As can be seen from the structure described above, the speed v of the special electric tractor provided in this application is set within the range of 20km / h to 30km / h, which fully meets the travel speed requirements of the TMR feed mixer 20. As a result, the PTO reduction gearbox 5 only needs to be equipped with gears and / or planetary gears, without the need for a shifting structure. Only one speed ratio is required. In other words, the wide speed range of the motor is fully utilized to meet the operating conditions of the TMR feed mixer 20 for traction in cattle farms.

[0053] In this embodiment, preferably, the output speed of the PTO reduction gearbox 5 is n, and 0≤n≤1000rpm. As can be seen from the structure described above, the PTO reduction gearbox 5 plays the role of speed reduction and torque increase, reducing the speed of the PTO motor 4 to the commonly used range of 0-1000 rpm, which fully meets the mixing speed requirements of the TMR feed mixer 20. As a result, the PTO reduction gearbox 5 only needs to be equipped with gears and / or planetary gears, without the need for a shifting structure. Only one speed ratio is required, making full use of the wide speed range of the motor to meet the operating conditions of the TMR feed mixer 20 for cattle farm traction.

[0054] In this embodiment, preferably, as follows: Figure 1 As shown, the PTO reduction gearbox 5 is an existing ordinary gearbox that serves to reduce speed and increase torque, reducing the speed of the PTO motor 4 to the commonly used range of 0-1000 rpm. It is compatible with the TMR feed mixer 20, does not have a shifting mechanism, has only one speed ratio, and has a simple structure, low cost, high reliability, and requires no complicated operation. In this embodiment, preferably, as follows: Figure 1As shown, the walking reduction gearbox 7 is an existing ordinary gearbox that plays the role of reducing speed and increasing torque, reducing the speed of the walking motor 6 to the allowable speed range within the cattle farm. It is compatible with the TMR feed mixer 20, does not have a shifting mechanism, has only one speed ratio, has a simple structure, low cost, high reliability, and does not require complicated operation.

[0055] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the special-purpose electric tractor also includes a hood 14, a front axle bracket 15, a front fixing member 16, a first rear fixing member 17, and a connecting member 19; wherein, the power battery 1 is placed on the front axle bracket 15 and located inside the hood 14. One end of the power battery 1 is connected to the hood 14 via the front fixing member 16, and the other end of the power battery 1 is connected to the hood 14 via the first rear fixing member 17 and the second rear fixing member 18; one end of the connecting member 19 is connected to the front axle bracket 15, and the other end of the connecting member 19 is connected to the PTO reduction gearbox.

[0056] As can be seen from the structure described above, the power battery 1 is integrated on the hood 14 to form the power battery 1-hood 14 assembly. The assembled sub-assembly is then fixed on the front axle bracket 15, eliminating the need for later assembly, saving time and effort. This also eliminates the redundant opening and closing mechanism required to install the power battery 1 inside the hood 14 of the vehicle, resulting in a simpler structure, saving parts, reducing costs, reducing assembly steps, saving labor costs, and eliminating wear and tear on moving parts, thus reducing the failure rate.

[0057] It should be noted that the hood 14 is the outer cover of the fuselage in front of the cab, and the aforementioned front axle bracket 15 are both front structures, which will not be described in detail here.

[0058] In addition, accessories such as headlight assembly and horn assembly can be integrated at the front of the hood 14. The headlight assembly (including turn signals and daytime running lights) and horn assembly can be fixed to the mounting brackets pre-set at the front of the hood 14 with bolts. The wiring harness is led out from the pre-reserved wiring hole inside the hood 14 and connected to the tractor main wiring harness (a sealing ring is provided at the wiring hole to prevent water ingress).

[0059] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the front fixing member 16 is arranged in a Z-shape, and one side of the front fixing member 16 is connected to the front end of the hood 14, while the other side of the front fixing member 16 is connected to the front end of the power battery 1.

[0060] As can be seen from the structure described above, the front fixing member 16 is designed in a Z-shape to facilitate the connection between the power battery 1 and the hood 14. Of course, it is not limited to this; the front fixing member 16 can also be designed in other shapes, such as L-shape.

[0061] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the first rear fixing member 17 is U-shaped and is fastened to the top of the power battery 1. The opposite side walls of the first rear fixing member 17 are connected to the opposite side parts of the power battery 1, and the top of the first rear fixing member 17 is connected to the bottom of the second rear fixing member 18.

[0062] As can be seen from the structure described above, the first rear fixing member 17 is designed in a U-shape, which increases the area of ​​its cooperation with the power battery 1 and the second rear fixing member 18, thus playing a role in stabilizing the connection. Of course, it is not limited to this, and the first rear fixing member 17 can also be designed in other shapes, such as L-shape.

[0063] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the second rear fastener 18 is arranged in a Z-shape, and the top of the second rear fastener 18 is connected to the top of the cover 14, while the bottom of the second rear fastener 18 is connected to the top of the first rear fastener 17.

[0064] As can be seen from the structure described above, the second rear fastener 18 is designed in a Z-shape to facilitate the connection between the first rear fastener 17 and the cover 14. Of course, it is not limited to this; the second rear fastener 18 can also be designed in other shapes, such as an L-shape.

[0065] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the front fixing member 16 is detachably connected to the power battery 1 and the hood 14 via fastening components such as bolts. This is a detachable connection method, which facilitates installation and disassembly, and is especially convenient for maintenance. Of course, it is not limited to this; it can also be connected by snap-fit ​​or welding.

[0066] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the first rear fixing member 17 is detachably connected to the power battery 1 and the second rear fixing member 18 via fastening components such as bolts. This is a detachable connection method, which facilitates installation and disassembly, and is especially convenient for maintenance. Of course, it is not limited to this; it can also be connected by snap-fit ​​or welding.

[0067] In this embodiment, preferably, as follows: Figure 2 and Figure 3The second rear fastener 18 shown is detachably connected to the housing 14 via fastening components such as bolts. This detachable connection method facilitates installation and disassembly, and is especially convenient for maintenance. Of course, it is not limited to this method; it can also be connected by snap-fit ​​or welding.

[0068] In this embodiment, preferably, as follows: Figure 2 and Figure 3 As shown, the connecting component 19 is detachably connected to the front axle bracket 15 and the PTO reduction gearbox via fastening components such as bolts. This is a detachable connection method, which facilitates installation and disassembly, and is especially convenient for maintenance. Of course, it is not limited to this; it can also be connected by snap-fit ​​or welding.

[0069] Furthermore, preferably, the connecting member 19 is a plate-shaped structure, and preferably, there are two connecting members 19, which are respectively disposed on both sides of the front axle bracket 15 along its width direction.

[0070] In summary, the special-purpose electric tractor provided in this application has the following structure and advantages: This application provides a novel electric tractor suitable for use in conjunction with a TMR feed mixer 20 in a livestock farm. Compared with traditional fuel tractors, this electric tractor has a simpler structure and adopts independent travel motor 6 and PTO motor 4, that is, it adopts a multi-motor route, thereby solving the problem of coupling between travel and PTO power output, realizing independent control of travel and PTO power output, achieving power decoupling, and eliminating the need for frequent gear shifting, simplifying operation, improving work efficiency, and using electric motors as power, resulting in lower overall noise and vibration compared to transmission fuel diesel engine models, making it more suitable for operation in cattle farm environments.

[0071] Moreover, this special-purpose electric tractor emits no exhaust fumes during operation, which avoids air pollution, reduces odors and harmful gases in the breeding environment, and lowers the health risks for operators. Furthermore, the electric tractor is powered by an electric motor, and its noise level is much lower than that of traditional fuel tractors, with less vibration. This reduces disturbance to cattle in areas such as barns and feed areas, lowers the risk of stress, and indirectly protects the growth status and milk production efficiency of the cattle.

[0072] The gear arrangement and shifting mechanism of the walking system and PTO system are eliminated, making full use of the wide speed range of the motor to meet the operating conditions of the TMR feed mixer 20 in cattle farms. This makes the structure of this special electric tractor simpler, the cost lower, and the reliability higher. It does not require gear shifting and is easy to operate.

[0073] The thermal management unit 12, which is arranged on the side of the tractor, enables the cooling and heating of the power battery 1, the cooling of the motor and the multi-function controller, and the heating and cooling of the cab. Moreover, since the thermal management unit 12 is fixed on the outer wall of the chassis, the structure is more compact, the cooling pipes are reduced, and the internal space of the hood is increased, so that a power battery 1 with a larger capacity can be arranged.

[0074] The system adopts an integrated multi-controller solution, which includes a PTO motor controller, a walking motor controller, a hydraulic motor controller, a DC-DC converter, and a PDU power distribution box. The structure is compact, which simplifies the structure of the new energy three-electric system, reduces the layout of high-voltage lines, and reduces the complexity and weight of the new energy three-electric system, making it more compact.

[0075] Furthermore, the power battery 1 is integrated into the hood 14 to form the power battery 1-hood 14 assembly. The assembled sub-assembly is then fixed on the front axle bracket 15, eliminating the need for later assembly, saving time and effort. This also eliminates the redundant opening and closing mechanism required to install the power battery 1 inside the hood 14 of the vehicle, resulting in a simpler structure, saving parts, reducing costs, reducing assembly steps, saving labor costs, and eliminating wear issues of moving parts, thus reducing the failure rate.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A special-purpose electric tractor, characterized in that, include: The system includes a power battery, a PTO motor, a PTO reduction gearbox, a travel motor, a travel reduction gearbox, and a rear axle; wherein the output end of the PTO motor is connected to the input end of the PTO reduction gearbox, and the output end of the PTO reduction gearbox is used to connect to the mixing mechanism of the feed mixer and to drive the mixing mechanism of the feed mixer to mix the materials. The output end of the walking motor is connected to the input end of the walking reduction gearbox, and the output end of the walking reduction gearbox is connected to the rear axle and is used to drive the rear axle to drive the rear wheels to move, so that the whole vehicle moves. The whole vehicle is used to synchronously drive the feed mixer to move at a preset speed. The power battery is electrically connected to the PTO motor and the walking motor and is used to supply power to the PTO motor and the walking motor.

2. The special-purpose electric tractor according to claim 1, characterized in that, The special-purpose electric tractor also includes a hydraulic motor and a hydraulic pump; wherein the hydraulic pump is connected to the hydraulic motor, and the hydraulic motor is used to drive the hydraulic pump; the power battery is electrically connected to the hydraulic motor and is used to supply power to the hydraulic motor.

3. The special-purpose electric tractor according to claim 2, characterized in that, The special-purpose electric tractor also includes a main control unit, which includes an integrated PTO motor controller, a travel motor controller, and a hydraulic motor controller. The PTO motor controller is communicatively connected to the PTO motor; the travel motor controller is communicatively connected to the travel motor; and the hydraulic motor controller is communicatively connected to the hydraulic motor.

4. The special-purpose electric tractor according to claim 3, characterized in that, The special-purpose electric tractor also includes a BDU battery disconnect module and a PDU high-voltage power distribution module; wherein, the PDU high-voltage power distribution module is electrically connected to the power battery through the BDU battery disconnect module, and the PTO motor, the travel motor and the hydraulic motor are respectively electrically connected to the PDU high-voltage power distribution module.

5. The special-purpose electric tractor according to claim 4, characterized in that, The special-purpose electric tractor also includes a DC-DC converter module and low-voltage electrical equipment; wherein, the DC-DC converter module is electrically connected to the power battery through the BDU battery disconnect module, and the low-voltage electrical equipment is electrically connected to the DC-DC converter module.

6. The special-purpose electric tractor according to claim 5, characterized in that, The BDU battery circuit breaker module, the PDU high-voltage power distribution module, the DC-DC converter module, the PTO motor controller, the walking motor controller, and the hydraulic motor controller are integrated together.

7. The special-purpose electric tractor according to claim 6, characterized in that, The special-purpose electric tractor also includes a thermal management unit, which is used to heat or cool the power battery, the PTO motor, the travel motor, the hydraulic motor, and the main control device; the PDU high-voltage power distribution module is electrically connected to the thermal management unit. The thermal management unit is installed on the outer wall of the chassis.

8. The special-purpose electric tractor according to claim 1, characterized in that, The speed of the special-purpose electric tractor is v, and 20km / h≤v≤30km / h; and / or The output speed of the PTO reduction gearbox is n, and 0 ≤ n ≤ 1000 rpm; and / or The PTO reduction gearbox does not contain a shifting mechanism; and / or The travel reduction gearbox does not contain a shifting mechanism.

9. The special-purpose electric tractor according to any one of claims 1 to 8, characterized in that, The special-purpose electric tractor also includes a hood, a front axle bracket, a front fixing component, a first rear fixing component, a second rear fixing component, and connecting components; wherein, the power battery is placed on the front axle bracket and located inside the hood; One end of the power battery is connected to the hood via a front fixing member, and the other end of the power battery is connected to the hood via a first rear fixing member and a second rear fixing member; one end of the connecting member is connected to the front axle bracket, and the other end of the connecting member is connected to the PTO reduction gearbox.

10. The special-purpose electric tractor according to claim 9, characterized in that, The front fastener is arranged in a Z-shape, with one side of the front fastener connected to the front end of the hood and the other side of the front fastener connected to the front end of the power battery; and / or The first rear fixing member is U-shaped and is fastened to the top of the power battery. The opposite side walls of the first rear fixing member are connected to the opposite side portions of the power battery, and the top of the first rear fixing member is connected to the bottom of the second rear fixing member; and / or The second rear fastener is arranged in a Z-shape, with its top connected to the top of the hood and its bottom connected to the top of the first rear fastener; and / or The front fixing member is detachably connected to the power battery and the hood via fastening components; and / or The first rear fixing member, the power battery, and the second rear fixing member are all detachably connected via fastening components; and / or The second rear fastener is detachably connected to the hood via a fastening member; and / or The connecting components are detachably connected to the front axle bracket and the PTO reduction gearbox via fastening components.

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