Electric tractor chassis

Abstract

The application discloses an electric tractor chassis, which comprises a chassis frame, front wheels, rear wheels and a power supply device, wherein the chassis frame is provided with a first steering drive axle, a second steering drive axle, a first motor, a second motor, a third motor, a traveling transfer case, a reduction gearbox and a hydraulic assembly; the first motor is connected with the first steering drive axle and the second steering drive axle through the traveling transfer case; the second motor is connected with the reduction gearbox; the third motor is connected with the hydraulic assembly; the first steering drive axle is rotatably connected with the front wheels; the second steering drive axle is rotatably connected with the rear wheels; and the power supply device supplies power to the first motor, the second motor and the third motor. The application realizes independent control of traveling and power output, guarantees traveling function, hydraulic output and power output, and ensures that the hydraulic output and the power output are disconnected and connected at any time according to different traveling speeds and working speeds during work.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural machinery, in particular to an electric tractor chassis. BACKGROUND

[0002] As a work and production power platform in agricultural production, the tractor has many power output interfaces and connecting devices, such as a PTO power output shaft, a hydraulic output connector, a lifter and a three-point suspension connecting device. The traditional tractor is matched with a gearbox system assembly to realize the distribution of the above-mentioned power output interfaces. The above-mentioned gearbox system assembly is very complex, which needs different gear shifting to meet the power and speed requirements of the tractor in different work scenarios, and various transfer cases and clutches to meet the power output and disconnection of the hydraulic output, PTO power output and other devices. Since all the power comes from the engine, the gearbox assembly only plays a role in power distribution and speed change, resulting in coupling during tractor driving and working, for example, in order to achieve 540 rpm PTO power output, the engine needs to be at a speed of about 2000 rpm, and at this time the driving speed of the tractor is necessarily fast. In order to solve the problem of coupling of driving speed and working speed, high-end tractors are designed with a large number of gears to match different working conditions.

[0003] Electricity is the future of agricultural equipment development, but the electrification of the tractor chassis is different from that of the new energy vehicle chassis. The new energy vehicle chassis only needs a driving motor + reduction gearbox, and the chassis layout can be very simple. However, the electrification of the tractor chassis needs to ensure the hydraulic output and PTO power output, and exert the advantages of the electric chassis. The electric tractor chassis not only needs to ensure the driving function, hydraulic output and PTO power output, but also needs to provide different driving speeds and working speeds for different work, and ensure that the hydraulic output and PTO power output can be disconnected and connected at any time. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide an electric tractor chassis which can realize independent control of different power outputs.

[0005] The purpose of the present application is achieved by the following technical solutions:

[0006] The application provides an electric tractor chassis, which comprises a chassis frame, front wheels, rear wheels and a power supply device, wherein the chassis frame is provided with a first steering drive axle, a second steering drive axle, a first motor, a second motor, a third motor, a travel transfer case, a reduction box and a hydraulic assembly; the first motor is connected to the first steering drive axle and the second steering drive axle through the travel transfer case; the second motor is connected to the reduction box; the third motor is connected to the hydraulic assembly; the first steering drive axle is rotatably connected to the front wheels; the second steering drive axle is rotatably connected to the rear wheels; and the power supply device supplies power to the first motor, the second motor and the third motor.

[0007] In the application, as an optional embodiment, the first transmission shaft and the second transmission shaft are further provided, one end of the first transmission shaft and one end of the second transmission shaft are connected to the travel transfer case, the other end of the first transmission shaft is connected to the first steering drive axle, and the other end of the second transmission shaft is connected to the second steering drive axle.

[0008] In the application, as an optional embodiment, the third transmission shaft is further provided, and the second motor is connected to the reduction box through the third transmission shaft.

[0009] In the application, as an optional embodiment, the hydraulic assembly comprises a hydraulic pump, a front axle steering oil cylinder, a rear axle steering oil cylinder, a hydraulic lifter and a hydraulic output multi-way valve; the hydraulic pump is connected to the third motor; and the front axle steering oil cylinder, the rear axle steering oil cylinder, the hydraulic lifter and the hydraulic output multi-way valve are all connected to the hydraulic pump.

[0010] In the application, as an optional embodiment, the chassis frame is further provided with a power distribution module and a DCDC module; and the power supply device supplies power to the first motor, the second motor, the third motor and the DCDC module through the power distribution module.

[0011] In the application, as an optional embodiment, an installation through hole is arranged in the first steering drive axle, a rotating shaft is arranged in the installation through hole, the opening direction of the installation through hole is perpendicular to the extension direction of the first steering drive axle, so that the rotating shaft is perpendicular to the first steering drive axle, the rotating shaft is further connected to the chassis frame, and the first steering drive axle can rotate around the rotating shaft as the axis.

[0012] In the application, as an optional embodiment, the chassis frame is provided with a first limiting piece, the first steering drive axle is provided with a second limiting piece, and when the first steering drive axle rotates around the rotating shaft to abut against the first limiting piece and the second limiting piece, the rotation of the first steering drive axle around the rotating shaft is limited.

[0013] In the present application, as an optional embodiment, the number of the first limiting members and the number of the second limiting members are both 2, one of the first limiting members is installed on one side of the rotating shaft on the chassis frame, the other first limiting member is installed on the other side of the rotating shaft on the chassis frame, one of the second limiting members is installed on one side of the first steering drive axle, the other second limiting member is installed on the other side of the second steering drive axle, and one of the first limiting members corresponds to one of the second limiting members in position, and the other first limiting member corresponds to the other second limiting member in position, when the first steering drive axle rotates around the rotating shaft so that one of the first limiting members abuts against one of the second limiting members, the other first limiting member and the other second limiting member are away from each other.

[0014] In the present application, as an optional embodiment, the first motor, the second motor, the travel transfer case and the reduction gearbox are all installed on the left-right symmetrical shaft of the chassis frame.

[0015] In the present application, as an optional embodiment, the chassis frame is further connected with a three-point linkage device.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] The electric tractor chassis provided by the present application is provided with three motors, which are respectively connected to control the first steering drive axle, the second steering drive axle, the reduction gearbox and the hydraulic assembly, the first steering drive axle and the second steering drive axle are controlled by the first motor, the reduction gearbox is connected by the second motor, and the hydraulic assembly is driven by the third motor, that is, the three independent motors can be used to independently control the travel and power output, avoiding the defects of the engine plus the reduction gearbox assembly in the prior art, which can not only ensure the travel function, the hydraulic output and the power output, but also ensure that the hydraulic output and the power output are disconnected and connected at any time according to different travel speeds and working speeds during work. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of an electric tractor chassis according to an embodiment of the present application;

[0019] Figure 2 It is a side view structure schematic view of an electric tractor chassis according to an embodiment of the present application;

[0020] Figure 3 It is a structure schematic view of four-wheel steering according to an embodiment of the present application;

[0021] Figure 4 It is a structure schematic view of crab steering according to an embodiment of the present application;

[0022] Figure 5The structure diagram of the first steering drive axle relative to the rotating shaft oscillation of the embodiment of the present application is shown in the figure.

[0023] Figure 6 The structure diagram of the second steering drive axle relative to the rotating shaft oscillation of the embodiment of the present application is shown in the figure. Figure 5 The local enlarged view of the A area in the figure is shown in the figure.

[0024] Figure 7 The structure diagram of the second steering drive axle relative to the rotating shaft oscillation of the embodiment of the present application is shown in the figure. Figure 5 The local enlarged view of the B area in the figure is shown in the figure.

[0025] In the figure: 001, chassis frame; 002, first steering drive axle; 003, second steering drive axle; 004, front wheel; 005, rear wheel; 006, first motor; 007, second motor; 008, third motor; 009, travel transfer case; 010, reduction box; 011 first transmission shaft; 012, second transmission shaft; 013, third transmission shaft; 014, hydraulic pump; 015, front axle steering oil cylinder; 016, rear axle steering oil cylinder; 017, hydraulic lifter; 018, hydraulic output multi-way valve; 019, power supply device; 020, DCDC module; 021, rotating shaft; 022, first limiting piece; 023, second limiting piece; 024, three-point suspension device. DETAILED DESCRIPTION

[0026] The present application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments, without conflict. Unless otherwise specified, the materials and devices used in the embodiments can be purchased from the market. Examples of the embodiments are shown in the drawings, in which the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0027] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0028] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "communication", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or connected through an intermediate medium, or the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0029] The terms "first", "second", and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0030] The embodiment of the present application provides an electric tractor chassis, which is provided with three motors, which are respectively used for connecting and controlling a first steering drive axle, a second steering drive axle, a reduction box and a hydraulic assembly. The first steering drive axle and the second steering drive axle are controlled through the first motor, the reduction box is connected through the second motor, and the hydraulic assembly is driven through the third motor, that is, the three independent motors can be used for independently controlling the driving and power output, so that the defects of the engine and the gearbox assembly in the prior art are avoided, the driving function, the hydraulic output and the power output can be ensured, and the hydraulic output and the power output can be disconnected and connected at any time according to different driving speeds and working speeds during work.

[0031] Please refer to Figure 1 and Figure 2 It is shown that the electric tractor chassis provided by the embodiment comprises a chassis frame 001, a front wheel 004, a rear wheel 005 and a power supply device 019. The chassis frame 001 is provided with a first steering drive axle 002, a second steering drive axle 003, a first motor 006, a second motor 007, a third motor 008, a driving transfer case 009, a reduction box 010 and a hydraulic assembly. The first motor 006 is connected with the first steering drive axle 002 and the second steering drive axle 003 through the driving transfer case 009. The second motor 006 is connected with the reduction box 010. The third motor 008 is connected with the hydraulic assembly. The first steering drive axle 002 is further rotatably connected with the front wheel 004. The second steering drive axle 003 is further rotatably connected with the rear wheel 005. The power supply device supplies power to the first motor 006, the second motor 007 and the third motor 008.

[0032] In the above embodiment, three motors are provided, which correspond to different mechanisms for control. Among them, the first steering drive axle 002 corresponds to the front steering drive axle, that is, is used to drive the front wheels 004, and the second steering drive axle 003 corresponds to the rear steering drive axle, that is, is used to drive the rear wheels 005. In the embodiment, the first motor 006 is connected to the first steering drive axle 002 and the second steering drive axle 003 through the travel transfer case 009, and the first motor 006 simultaneously drives and controls the first steering drive axle 002 and the second steering drive axle 003, thereby synchronously controlling the front wheels 004 and the rear wheels 005. In the embodiment, since the front wheels 004 and the rear wheels 005 are not driven by separate motors, the embodiment cannot realize the front-wheel drive and rear-wheel drive conditions, and the embodiment is four-wheel drive. The travel transfer case 009 is a constant-speed double output, and full-time four-wheel drive is adopted during travel. The travel transfer case 009 may, for example, correspond to two gears, high gear and low gear, for controlling the chassis frame 001 to travel quickly on the road and work on the non-road. Please see Figures 3 to 4 , Figure 3 The four-wheel drive condition is shown. In addition, the chassis frame 001 of the embodiment can also realize crab-type steering, as shown in Figure 4 In the above, the power supply device 019 is mainly a high-voltage distribution box. High-voltage electricity comes out of the battery, first enters the high-voltage distribution box, and then supplies power to the three motors respectively.

[0033] As a preferred embodiment, the embodiment further includes a first transmission shaft 011 and a second transmission shaft 012, one end of the first transmission shaft 011 and one end of the second transmission shaft 012 are connected with the travel transfer case 009, the other end of the first transmission shaft 011 is connected with the first steering drive axle 002, and the other end of the second transmission shaft 012 is connected with the second steering drive axle 003. The first transmission shaft 011 and the second transmission shaft 012 are both transmission mechanisms, one end of the first transmission shaft 011 and one end of the second transmission shaft 012 are connected to the output end of the travel transfer case 009, the other end of the first transmission shaft 011 is connected to the input flange of the first steering drive axle 002, and the other end of the second transmission shaft 012 is connected to the input flange of the second steering drive axle 003. Through the first transmission shaft 011 and the second transmission shaft 012, the functions are transmitted, thereby driving the first steering drive axle 002 and the second steering drive axle 003, and realizing the travel system control in the embodiment.

[0034] The preferred embodiment in the embodiment also includes a third transmission shaft 013, which is also a transmission mechanism, and the third transmission shaft 013 is used to connect the second motor 007, so that the second motor 007 is connected with the reduction box 010 through the third transmission shaft 013. In the embodiment, the second motor 007 is a power output motor, and the third transmission shaft 013 is used as a transmission shaft connected with the second motor 007, and the other end is connected with the input end of the reduction box 010, and the output end of the reduction box 010 is the power output shaft of the chassis frame 001. The power output system of the embodiment adopts an independent pto motor, which can independently control the speed and power of the power output, so as to realize the independence of the pto operation and the driving function, which is different from the traditional tractor.

[0035] In addition, the embodiment also has a hydraulic system, that is, the hydraulic system is realized by cooperation of the hydraulic assembly and the third motor 008 in the embodiment. The hydraulic assembly includes a hydraulic pump 014, a front axle steering oil cylinder 015, a rear axle steering oil cylinder 016, a hydraulic lifter 017, and a hydraulic output multi-way valve 018. The hydraulic pump 014 is connected with the third motor 008, and the front axle steering oil cylinder 015, the rear axle steering oil cylinder 016, the hydraulic lifter 017, and the hydraulic output multi-way valve 018 are all connected with the hydraulic pump 014. The hydraulic system also adopts an independent motor drive, which is used to control the steering, lifting and hydraulic cylinder of the chassis frame 001, and also realizes the independence of the hydraulic output and the lifter.

[0036] In addition, the embodiment also has a power distribution module and a DCDC module 020, and the power supply device 019 supplies power to the first motor 006, the second motor 007, the third motor 008 and the DCDC module 020 through the power distribution module.

[0037] In addition to the three motors arranged in the embodiment for respectively controlling the driving function, the power output function and the hydraulic function, the embodiment can also realize the swing of the front wheels 004 and the rear wheels 005 in the height direction. Specifically, a mounting through hole is arranged in the first steering drive axle 002, a rotating shaft 021 is arranged in the mounting through hole, the opening direction of the mounting through hole is perpendicular to the extension direction of the first steering drive axle 002, so that the rotating shaft 021 is perpendicular to the first steering drive axle 002, and the rotating shaft 023 is also connected with the chassis frame 001, and the first steering drive axle 002 can rotate around the rotating shaft 021 as the axis.

[0038] Further, in combination with Figures 5 to 7The first limiting piece 022 is arranged on the chassis frame 001, the first steering drive axle 002 is provided with the second limiting piece 023, when the first steering drive axle 002 rotates around the rotating shaft 021 to abut the first limiting piece 022 and the second limiting piece 023, the first steering drive axle 002 is limited to continue to rotate around the rotating shaft 023. Through the arrangement of the first limiting piece 022 and the second limiting piece 023, the height of the up-down swing of the first steering drive axle 002 is limited, so as to avoid the driving risk caused by the too large up-down swing of the front wheel 004. Since there are two front wheels 004, when the front wheel 004 on the left side swings upward, the front wheel 004 on the right side swings downward correspondingly, at this time, the first limiting piece 022 and the second limiting piece 023 corresponding to the left front wheel 004 will abut when swinging to a certain degree. And in another case, when the front wheel 004 on the right side swings upward, the front wheel 004 on the left side swings downward correspondingly, at this time, the first limiting piece 022 and the second limiting piece 023 corresponding to the right front wheel 004 need to abut when swinging to a certain degree. Therefore, the first limiting piece 024 and the second limiting piece 023 corresponding to the left and right two front wheels 004 need to be arranged respectively, that is, the number of the first limiting piece 022 and the number of the second limiting piece 023 are both 2, one of the first limiting piece 022 is installed on one side of the rotating shaft 021 of the chassis frame 001, the other of the first limiting piece 022 is installed on the other side of the rotating shaft 021 of the chassis frame 001, one of the second limiting piece 025 is installed on one side of the first steering drive axle 002, the other of the second limiting piece 023 is installed on the other side of the first steering drive axle 002, and one of the first limiting piece 022 and one of the second limiting piece 023 are positionally corresponding, the other of the first limiting piece 022 and the other of the second limiting piece 023 are positionally corresponding, when the first steering drive axle 002 rotates around the rotating shaft 021 to make one of the first limiting piece 022 and one of the second limiting piece 023 abut, the other of the first limiting piece 022 and the other of the second limiting piece 023 are away from each other.

[0039] The first motor 006, the second motor 007, the travel transfer case 008 and the reduction box 010 are all installed on the left-right symmetrical shaft of the chassis frame 001, the left-right symmetry is with the symmetrical shaft of the two front wheels or the two rear wheels as the symmetrical shaft. In addition, the three-point suspension device 024 is also connected to the chassis frame 001 in the embodiment, the three-point suspension device 024 is used to connect other agricultural implements outside to realize agricultural mechanized operation.

[0040] While only certain components and embodiments have been described and shown, many modifications and changes can occur to those skilled in the art (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, changes in material, colors, orientations, locations, and the like). Some features have been shown and described separately for clarity. It is to be understood that where the application or any embodiment is described and shown in only one of alternative embodiments, each alternative embodiment can be produced individually. It is also to be understood that the application includes all of the alternative embodiments in their multiple permutations. It is intended that the application encompass all such changes and modifications and, accordingly, the application is not to be limited by what has been shown and described.

[0041] The above embodiments are only preferred embodiment modes of the application, and cannot be used to limit the scope of protection of the application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the application are within the scope of protection of the application.

Claims

1. An electrically powered tractor chassis, characterized in that The chassis frame, front wheels, rear wheels and power supply device are provided with a first steering drive axle, a second steering drive axle, a first motor, a second motor, a third motor, a travel transfer case, a reduction box and a hydraulic assembly, the first motor is connected with the first steering drive axle and the second steering drive axle through the travel transfer case, the second motor is connected with the reduction box, the third motor is connected with the hydraulic assembly, the first steering drive axle is rotatably connected with the front wheels, the second steering drive axle is rotatably connected with the rear wheels, the power supply device supplies power to the first motor, the second motor and the third motor; the first transmission shaft and the second transmission shaft are connected with the travel transfer case, one end of the first transmission shaft is connected with the first steering drive axle, and the other end of the first transmission shaft is connected with the second steering drive axle; the second motor is connected with the reduction box through the third transmission shaft; the hydraulic assembly comprises a hydraulic pump, a front axle steering oil cylinder, a rear axle steering oil cylinder, a hydraulic lifter and a hydraulic output multi-way valve, the hydraulic pump is connected with the third motor, and the front axle steering oil cylinder, the rear axle steering oil cylinder, the hydraulic lifter and the hydraulic output multi-way valve are connected with the hydraulic pump; An installation through hole is arranged in the first steering drive axle, a rotating shaft is arranged in the installation through hole, the opening direction of the installation through hole is perpendicular to the extension direction of the first steering drive axle, so that the rotating shaft is perpendicular to the first steering drive axle, the rotating shaft is further connected with the chassis frame, and the first steering drive axle can rotate around the rotating shaft as the axis; the chassis frame is provided with a first limiting piece, the first steering drive axle is provided with a second limiting piece, when the first steering drive axle rotates around the rotating shaft to abut against the first limiting piece and the second limiting piece, the rotation of the first steering drive axle around the rotating shaft is limited; the number of the first limiting pieces and the number of the second limiting pieces are both 2, one of the first limiting pieces is arranged on one side of the rotating shaft of the chassis frame, the other of the first limiting pieces is arranged on the other side of the rotating shaft of the chassis frame, one of the second limiting pieces is arranged on one side of the first steering drive axle, and the other of the second limiting pieces is arranged on the other side of the second steering drive axle, one of the first limiting pieces corresponds to one of the second limiting pieces in position, and the other of the first limiting pieces corresponds to the other of the second limiting pieces in position, when the first steering drive axle rotates around the rotating shaft to abut against one of the first limiting pieces and one of the second limiting pieces, the other of the first limiting pieces and the other of the second limiting pieces are away from each other.

2. The electrically powered tractor chassis of claim 1, wherein, The chassis frame is further provided with a power distribution module and a DCDC module, the power supply device supplies power to the first motor, the second motor, the third motor, the DCDC module and the power distribution module. The first motor, the second motor and the travel transfer case are arranged on the left-right symmetrical shafts of the chassis frame.

3. The electrically powered tractor chassis of claim 1, wherein, The chassis frame is further connected with a three-point suspension device.

4. The electrically powered tractor chassis of claim 1, wherein, ​

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