Electric tractor

Abstract

The utility model discloses an electric tractor, which relates to the technical field of tractors and comprises an unpowered chassis, a driving system and a battery system, the unpowered chassis is connected with the driving system, the battery system is arranged on the unpowered chassis and comprises a plurality of battery packs, a battery support and a high-voltage box, the battery packs are arranged on the battery support, and the high-voltage box is arranged on the battery support. The battery support is installed above a frame of the unpowered chassis and located behind a cab of the unpowered chassis, the battery pack is connected with the high-voltage box, the unpowered chassis comprises a front axle and a middle axle, and the driving system comprises a driving axle. More battery packs can be configured, the total electric quantity of the tractor is improved, the endurance mileage of the tractor is further improved, the number of times of charging in operation time is reduced, meanwhile, the whole tractor adopts 6 * 2 single-drive type power, the endurance mileage of the tractor is further improved, and the tractor is more suitable for being used in the fields of small power requirements, low cost and the like. And in a scene with relatively long mileage, the operation cost is reduced and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to an electric tractor. Background Art

[0002] Currently, port tractors are gradually moving towards pure electricization, and traditional fuel vehicles will be subject to more and more restrictions on operating hours and road rights.

[0003] The pure electric tractor technology solution known to the applicant is a product solution developed based on the coal and steel transportation scenarios. The whole vehicle adopts 6×4 dual-drive power, has 282kwh of power, and a cruising range of 120 to 140km. This solution has the following problems in certain scenarios with low power requirements and long mileage, such as port container transportation scenarios: 1) The power margin is relatively large and the energy consumption is high; 2) Multiple electric energy replenishment is required during operation, which has a certain impact on the overall operational efficiency and operation scheduling.

[0004] Therefore, people are in urgent need of an electric tractor with low energy consumption and long cruising range. Summary of the Invention

[0005] The purpose of this utility model is to provide an electric tractor to solve the problems existing in the above-mentioned prior art. A plurality of battery packs are arranged behind the cab and above the frame, and combined with a 6×2 single-drive power type, the vehicle's operating energy consumption is reduced and the cruising range is increased.

[0006] To achieve the above-mentioned objectives, the present invention provides the following solution: The present invention provides an electric tractor, comprising an unpowered chassis, a drive system, and a battery system, wherein the unpowered chassis is connected to the drive system, the battery system is arranged on the unpowered chassis, the battery system comprises a plurality of battery packs, a battery bracket, and a high-voltage box for distributing electrical energy, the battery pack is arranged on the battery bracket, the battery bracket is mounted above the frame of the unpowered chassis, the battery bracket is located behind the cab of the unpowered chassis, the battery pack is connected to the high-voltage box, the unpowered chassis comprises a front axle and a middle axle, and the drive system comprises a drive axle.

[0007] Preferably, the battery bracket is covered with shielding plates on all sides.

[0008] Preferably, the battery bracket is spaced apart from the cab of the unpowered chassis.

[0009] Preferably, the battery bracket includes a frame for placing the battery pack, a mounting base and a charging socket box for charging the battery pack, the charging socket box is arranged at the bottom side of the frame, the mounting base is arranged at the bottom of the frame, and the mounting base is connected to the beam of the unpowered chassis.

[0010] Preferably, reinforcement beams are provided on both sides of the bottom of the frame corresponding to the mounting base.

[0011] Preferably, the drive system includes a motor controller, a motor assembly, a gearbox assembly, a gearbox controller, a drive shaft and the drive axle. The motor assembly, the gearbox assembly, the drive shaft and the drive axle are sequentially connected in transmission mode. The motor controller is connected to the motor assembly, and the gearbox controller is connected to the gearbox assembly.

[0012] Preferably, the motor of the motor assembly is a permanent magnet synchronous motor.

[0013] Preferably, the cab of the unpowered chassis is flip-mounted on the frame of the unpowered chassis.

[0014] Preferably, the battery pack is a lithium iron phosphate battery pack.

[0015] Preferably, the battery system includes twelve battery packs, four battery packs are combined into a branch, and three branches are arranged in parallel.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] By utilizing the larger space behind the cab and above the frame, more battery packs can be configured to increase the total power of the tractor, thereby increasing the cruising range of the tractor and reducing the number of charging times during operation. At the same time, the unpowered chassis includes a front axle and a middle axle, and the drive system includes a drive axle setting, so that the overall tractor has a 6×2 single-drive type power, which reduces energy consumption compared to a 6×4 dual-drive type power. Combined with the setting of multiple battery packs, the cruising range of the tractor is further increased, making the tractor more suitable for scenarios with lower power requirements and longer mileage, reducing operating costs and improving operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of an electric tractor in an embodiment of the present utility model;

[0020] Figure 2 This is a top view of the electric tractor in the embodiment of the present utility model;

[0021] Figure 3 This is a schematic structural diagram of a drive system in an embodiment of the present utility model;

[0022] Figure 4 This is a schematic structural diagram of a battery system in an embodiment of the present utility model;

[0023] Among them, 1. Unpowered chassis; 2. Drive system; 3. Battery system; 4. Battery pack; 5. High-voltage box; 6. Frame; 7. Mounting base; 8. Charging socket box; 9. Reinforcement beam; 10. Motor controller; 11. Motor assembly; 12. Gearbox assembly; 13. Gearbox controller; 14. Drive shaft; 15. Drive axle. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] The purpose of this utility model is to provide an electric tractor to solve the problems existing in the prior art. A plurality of battery packs are arranged behind the cab and above the frame, and combined with a 6×2 single-drive power type, the vehicle's operating energy consumption is reduced and the cruising range is increased.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0027] Please refer to Figures 1 to 4As shown, an electric tractor is provided, including an unpowered chassis 1, a drive system 2 and a battery system 3. The unpowered chassis 1 is connected to the drive system 2, and the battery system 3 is arranged on the unpowered chassis 1. The battery system 3 includes a plurality of battery packs 4 including BMS slave boards, a battery bracket and a high-voltage box 5 including a BMS main board. The high-voltage box 5 is used to distribute electric energy to various electrical components of the tractor. The battery pack 4 is arranged on the battery bracket, and the battery bracket is installed above the frame of the unpowered chassis 1. The battery bracket is located behind the cab of the unpowered chassis 1. The battery pack 4 is connected to the high-voltage box 5. The larger space behind the cabin and above the frame can be used to configure more battery packs 4, thereby increasing the total power of the tractor and thus increasing the cruising range of the tractor and reducing the number of charging times during operation; the unpowered chassis 1 includes a front axle and a middle axle, and the drive system 2 includes a drive axle 15, so that the overall tractor is a 6×2 single-drive type power, which reduces energy consumption compared to the 6×4 dual-drive type power. Combined with the setting of multiple battery packs 4, the cruising range of the tractor is further improved, making the tractor more suitable for scenarios with lower power requirements and longer mileage, reducing operating costs and improving operating efficiency.

[0028] In this embodiment, the unpowered chassis 1 adopts a transmission chassis, including a cab, a frame, an air tank, a cooling device, an air compressor, a steering device, a tractor, a vehicle controller, a battery device, fenders, a front axle, a middle axle, tires and other structures. The cab is flipped onto the frame through a hydraulic system to facilitate maintenance and inspection.

[0029] The battery holder is covered with shielding plates on all sides to prevent external pollutants from contaminating the battery pack 4 inside the battery holder.

[0030] The shielding plate is connected to the battery bracket in a detachable manner by bolts or clips, which facilitates subsequent disassembly and provides convenience for battery replacement, maintenance and other operations.

[0031] The battery bracket is spaced apart from the cab of the unpowered chassis 1 to reserve heat dissipation space. The shielding plate has heat-conducting properties and vents are provided on the shielding plate to facilitate heat dissipation of the battery pack 4.

[0032] In this embodiment, the battery holder specifically includes a frame 6 for placing the battery pack 4, a mounting base 7 and a charging socket box 8. The charging socket box 8 is arranged at the bottom side of the frame 6 to reduce the setting height and facilitate charging the battery pack 4. The mounting base 7 is arranged at the bottom of the frame 6, and the mounting base 7 is connected to the beam of the unpowered chassis 1; the mounting base 7 and the frame 6 can be arranged as a whole to improve the structural strength.

[0033] The frame 6 itself includes a multi-layer load-bearing platform for carrying the battery pack 4. Railings are detachably provided around the frame 6 by means of bolts or snaps to prevent the battery pack 4 from falling out of the frame 6. The railings can be provided horizontally, vertically or diagonally.

[0034] Reinforcement beams 9 are provided on both sides of the bottom of the frame 6 corresponding to the mounting base 7 to improve the structural strength of the frame 6.

[0035] In this embodiment, the drive system 2 includes a motor controller 10, a motor assembly 11, a gearbox assembly 12, a gearbox controller 13, a drive shaft 14 and a drive axle 15. The motor assembly 11, the gearbox assembly 12, the drive shaft 14 and the drive axle 15 are connected in sequence for transmission. There are tires at both ends of the drive axle 15. The motor assembly 11 and the drive axle 15 are arranged on the vehicle frame. The motor controller 10 is connected to the motor assembly 11 for controlling the motor assembly 11. The gearbox controller 13 is connected to the gearbox assembly 12 for controlling the gearbox assembly 12.

[0036] In this embodiment, the motor of the motor assembly 11 is a permanent magnet synchronous motor. The main parameters of the selected permanent magnet synchronous motor are as follows:

[0037] Table 1

[0038]

[0039] The main technical parameters of the gearbox assembly 12 are shown in Table 2:

[0040] Table 2

[0041] project parameter Gear ratio 8.388 / 4.395 / 2.265 / 1 Weight (kg) 230 Maximum input torque (Nm) 2500 Maximum input speed (r / min) 3000

[0042] In this embodiment, the battery pack 4 is a lithium iron phosphate battery pack 4; the battery system 3 includes twelve battery packs 4, four battery packs 4 are combined into a branch, and three branches are arranged in parallel, which serves to increase the battery pack's capacity and power, reduce battery internal resistance, balance charging, and improve system redundancy; the total capacity of the battery system 3 is 387 kWh, and the relevant technical parameters are shown in Table 3. The cruising range can reach 240 to 300 km.

[0043] Table 3

[0044]

[0045] Adaptive changes based on actual needs are all within the protection scope of this utility model.

[0046] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An electric tractor, characterized in that: It includes an unpowered chassis, a drive system and a battery system. The unpowered chassis is connected to the drive system. The battery system is arranged on the unpowered chassis. The battery system includes multiple battery packs, battery brackets and a high-voltage box for distributing electrical energy. The battery packs are arranged on the battery brackets. The battery brackets are installed above the frame of the unpowered chassis. The battery brackets are located behind the cab of the unpowered chassis. The battery packs are connected to the high-voltage box. The unpowered chassis includes a front axle and a middle axle. The drive system includes a drive axle.

2. The electric tractor according to claim 1, characterized in that: The battery bracket is covered with shielding plates on all sides.

3. The electric tractor according to claim 1, characterized in that: The battery bracket is spaced apart from the cab of the unpowered chassis.

4. The electric tractor according to claim 1, characterized in that: The battery bracket includes a frame for placing the battery pack, a mounting base, and a charging socket box for charging the battery pack. The charging socket box is arranged at the bottom side of the frame, the mounting base is arranged at the bottom of the frame, and the mounting base is connected to the beam of the unpowered chassis.

5. The electric tractor according to claim 4, characterized in that: Reinforcement beams are provided on both sides of the bottom of the frame corresponding to the mounting base.

6. The electric tractor according to claim 1, characterized in that: The drive system includes a motor controller, a motor assembly, a gearbox assembly, a gearbox controller, a drive shaft and the drive axle. The motor assembly, the gearbox assembly, the drive shaft and the drive axle are connected in sequence. The motor controller is connected to the motor assembly, and the gearbox controller is connected to the gearbox assembly.

7. The electric tractor according to claim 6, characterized in that: The motor of the motor assembly is a permanent magnet synchronous motor.

8. The electric tractor according to claim 1, characterized in that: The cab of the unpowered chassis is flipped and arranged on the frame of the unpowered chassis.

9. The electric tractor according to claim 1, characterized in that: The battery pack is a lithium iron phosphate battery pack.

10. The electric tractor according to claim 1, characterized in that: The battery system includes twelve battery packs, four of which are combined into a branch, and three of which are arranged in parallel.

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