Platform structure for electric tractor

Abstract

The present invention relates to a platform structure of an electric tractor in which a battery is installed at the bottom front side of a cab and a hydraulic system is installed at the rear side to control a work machine, so that the tractor can be stably controlled, and to a platform structure of an electric tractor capable of stably maintaining a center of gravity while working, comprising: a front wheel part (10) and a rear wheel part (20) for transmitting power by four-wheel drive; a cab (30) installed between the front wheel part (10) and the rear wheel part (20) and mounted to allow a worker to ride; a battery part (40) for supplying power to the electric tractor; a hydraulic system (50) for driving a work machine; and a three-point linkage (70) installed at the rear of the hydraulic system (50) to allow the work machine to be attached thereto.

Description

Technical Field

[0001] This invention relates to a platform structure for an electric tractor, wherein the battery is installed at the front of the bottom of the cab and the hydraulic system is installed at the rear to control the working machine, thereby enabling the tractor to be stably controlled. Background Technology

[0002] As a prior art for the platform structure of electric tractors, Korean Patent 10-1302405 (registered on August 27, 2013) discloses a technology for an electric agricultural work vehicle driven by electricity, wherein a battery pack consisting of multiple battery cells is disposed in a front wheel side hood protected by an engine hood, a drive motor that generates power to drive the vehicle is disposed below the battery pack, a transmission mechanism connected to the drive motor to transmit power is disposed on the vehicle frame at the rear of the drive motor, and a hydraulic generator that generates hydraulic pressure is disposed below the driver's seat and near the rear wheel.

[0003] Furthermore, Korean Patent 10-1260751 (registered on April 29, 2013) discloses a technology in which a frame having a steering front wheel and a driving rear wheel is sequentially installed, an engine installed in the engine compartment of a tractor, and a transmission mechanism installed at the rear. The drive component is installed on the frame behind the engine, the rear axle for driving the rear wheel is connected to the rear of the transmission mechanism, and the PTO shaft extends from the PTO transmission component of the transmission mechanism to drive the working machine installed on the lift at the rear.

[0004] Furthermore, Korean Patent Application Publication No. 10-2016-0043446 (published on April 21, 2016) discloses a technology in which an agricultural work vehicle has drive wheels divided into front wheels (FW) and rear wheels (RW), a driver's seat for operating the vehicle is protected by a box-shaped cabin made of transparent glass, and an engine compartment is formed in front of the cabin, which forms the space for the main drive components of the vehicle, including the engine.

[0005] Furthermore, Korean Patent 10-2120174 (registered on June 2, 2020) discloses a technology for an electric tractor, including a battery that supplies power to drive the tractor, a plurality of drive motors connected to the battery, and a control unit for controlling the operation of the tractor, wherein the plurality of drive motors are supplied with the required power from the battery and the control unit independently controls the drive motors connected to the tractor wheels.

[0006] (Patent Documents)

[0007] Patent Document 1: Korean Patent 10-1302405 (registered on August 27, 2013)

[0008] Patent Document 2: Korean Patent 10-1260751 (registered on April 29, 2013)

[0009] Patent Document 3: Korean Patent Application Publication No. 10-2016-0043446 (published on April 21, 2016)

[0010] Patent Document 4: Korean Patent 10-2120174 (registered on June 2, 2020) Summary of the Invention

[0011] Technical issues

[0012] This invention is designed for use in electric tractors that perform driving and agricultural work. The purpose of this invention is to enable stable control of the tractor by installing a battery on the front side of the cab bottom and a hydraulic system on the rear side to control the working machine, thereby ensuring the stability of the tractor when working in open areas and on slopes.

[0013] Furthermore, the purpose of this invention is to use rear-wheel drive to provide power to the working machine without the need to install a specific independent motor to provide power to the working machine.

[0014] Furthermore, the purpose of this invention is to install a cooler and a radiator on the front side of the battery to cool the working fluid of the battery, transmission mechanism, etc.

[0015] Furthermore, the purpose of this invention is to install the battery and hydraulic system on the front and rear sides, so that the center of gravity of the battery and hydraulic system is located between the front and rear wheels of the tractor, thereby ensuring the stability of the tractor.

[0016] Solution to the problem

[0017] To achieve these objectives, [1] the present invention relates to a platform structure for an electric tractor that can stably maintain its center of gravity while operating, comprising: a front wheel assembly and a rear wheel assembly that transmit power via four-wheel drive; a cabin (30) mounted between the front wheel assembly and the rear wheel assembly and installed for a worker to sit on; a battery assembly (40) for supplying power to the electric tractor; a hydraulic system (50) for driving a working machine; and a three-point suspension mechanism (70) mounted at the rear of the hydraulic system to allow the working machine to be attached thereto.

[0018] Furthermore, the present invention relates to the platform structure of an electric tractor of [1], wherein [2] the cabin is mounted on an upper frame (not shown) installed between the battery component (40) and the hydraulic system (50).

[0019] Furthermore, the present invention relates to the platform structure of an electric tractor of [1], wherein a radiator (60) for cooling the battery component (40) is mounted at the front of the battery component (40), the front wheel component and the rear wheel component include a front wheel drive motor (11) and a rear wheel drive motor (21), and the front wheel drive motor (11) and the rear wheel drive motor (21) respectively have a front wheel drive transmission mechanism (12) and a rear wheel drive transmission mechanism (22) connected thereto, and the three-point suspension mechanism (70) is mounted at the rear of the hydraulic system so that the working machine can be attached.

[0020] Furthermore, the present invention relates to the platform structure of the electric tractor of [1], wherein [4] the hydraulic system (50) is driven by the rear wheel drive motor (21).

[0021] Advantages of the invention

[0022] Because of the above-described configuration, when this invention is applied to agricultural machinery such as tractors for driving and agricultural work, the slip control system of an independent drive platform with four motors driving four wheels can be easily applied even in slippage situations where the wheels rotate without traction on soil containing a large amount of water or with low strength.

[0023] Furthermore, when motor slip occurs due to overload, the present invention can control the output torque and rotation speed of the motor by increasing the output current of the inverter.

[0024] Furthermore, when the wheels slip, the present invention identifies the slippage and increases the output of the motor, thereby enabling the escape from rough terrain and increasing traction. Attached Figure Description

[0025] Figure 1 This is a conceptual diagram of the platform structure of the present invention.

[0026] Figure 2 This is a conceptual diagram of the structure of the front wheel component and the rear wheel component of the present invention.

[0027] Figure 3 This is a conceptual diagram of the vehicle lower frame structure of the present invention.

[0028] Figure 4 This is a conceptual diagram of the structure of the front wheel component and the rear wheel component of the present invention coupled to the vehicle's lower frame structure.

[0029] Figure 5 For battery components coupled to Figure 4 The diagram shows the concept of the structure of the object.

[0030] Figure label:

[0031] 11. Front-wheel drive motor

[0032] 12. Front-wheel drive transmission mechanism

[0033] 13 Front axle

[0034] 21 Rear-wheel drive motor

[0035] 22 Rear-wheel drive transmission mechanism

[0036] 23 Rear Axle

[0037] 30-seat cabin

[0038] 40 Battery Components

[0039] 41 Battery Control Module

[0040] 50 Hydraulic System

[0041] 60 radiator

[0042] 70 Three-point suspension mechanism

[0043] P Vehicle underframe Detailed Implementation

[0044] In the description of this invention, technical configurations that are the same as those in related technologies are given the same names.

[0045] This invention relates to a platform structure for an electric tractor capable of stably maintaining its center of gravity during operation, comprising: a front wheel assembly and a rear wheel assembly for transmitting power via four-wheel drive; a cab 30 mounted between the front and rear wheel assemblies for a worker to sit in; a battery assembly 40 for supplying power to the electric tractor; a hydraulic system 50 for driving the working machine; and a three-point suspension mechanism 70 mounted at the rear of the hydraulic system 50 to allow the working machine to be attached thereto. These components are described below with reference to the drawings.

[0046] [Front wheel assembly, rear wheel assembly, and cockpit (30)]

[0047] like Figures 1 to 5 The front and rear wheel components of the present invention shown are substantially the same as those of a conventional tractor.

[0048] However, the front wheel components and rear wheel components of the present invention differ from those in the related art that are driven by an engine in that they drive the front wheel axle 13 and the rear wheel axle 23 by means of the front wheel drive motor 11, the front wheel drive transmission mechanism 12, the rear wheel drive motor 21, and the rear wheel drive transmission mechanism 22, which are described below.

[0049] The cockpit 30 of this invention is also substantially the same as that of a conventional tractor.

[0050] However, it is preferable that the cockpit 30 is installed between the battery component 40 and the hydraulic system 50, which will be described below. In this case, the cockpit 30 is fixedly installed between the battery component 40 and the hydraulic system 50 on a separate upper frame (not shown).

[0051] In this invention, as described above, the front wheel drive motor 11 and the rear wheel drive motor 21 are respectively mounted on the front wheel component and the rear wheel component, thereby ensuring battery space in the upper space.

[0052] [Battery component (40)]

[0053] The battery component 40 of the present invention is a conventional fuel cell and is composed of multiple battery cells.

[0054] The battery component 40 is relatively heavy in the platform structure of the present invention, so it is preferable to install the battery component 40 on the upper side of the vehicle lower frame P and the front side of the cabin 30.

[0055] The battery control module 41 is mounted on the upper side of the battery component 40 at the front of the cabin 30. The battery control module 41 (battery management system (BMS, 41)) manages the charging and discharging of the battery of the electric tractor of the present invention according to the driving status. That is, the battery control module 41 performs data communication with the battery and controls general battery matters such as temperature, current and charging status.

[0056] [Hydraulic system (50)]

[0057] The hydraulic system 50 of the present invention consists of a three-point suspension mechanism 70 for a work vehicle installed at the rear of the tractor, a hydraulic pump, a hydraulic motor, and various valves for driving the steering system, and is substantially the same as the configuration of a conventional tractor.

[0058] However, the hydraulic system 50 of the present invention differs from the hydraulic system 50 of the related art in that it receives power from the rear wheel drive motor 21 mounted on the rear wheel assembly.

[0059] Furthermore, the three-point suspension system 70 is installed to attach / detach the working machine from the tractor and is installed in accordance with international standard (ISO11783).

[0060] [Radiator 60]

[0061] The heat sink 60 of the present invention is mounted on the front of the battery component 40 and cools the battery component 40.

[0062] Since the operating speed of a tractor is much lower than that of a regular vehicle, it is advantageous to mount the radiator 60 on the front of the tractor to achieve maximum heat exchange; therefore, the radiator 60 is mounted on the front of the battery assembly 40.

[0063] Furthermore, the radiator 60 not only cools the battery component 40, but also the working fluid (transmission oil, etc.).

[0064] The above description is provided as an example of the present invention. The embodiments described herein are provided to illustrate the present invention and not to limit the spirit of the present invention. Therefore, those skilled in the art can change and modify the present invention in various ways without departing from the scope of the present invention.

[0065] For example, the present invention is applied to the electric tractor T in the above embodiments, but the present invention can be applied not only to the electric tractor T, but also to ordinary agricultural machinery such as tractors and other electric vehicles.

[0066] Therefore, the scope of protection of this invention should be interpreted as described in the claims, and technical configurations within the same scope should also be interpreted as being included within the scope of protection of this invention.

Claims

1. A platform structure for an electric tractor capable of stably maintaining its center of gravity during operation, comprising: The front and rear wheel components transmit power through four-wheel drive; A cockpit (30) is installed between the front wheel assembly and the rear wheel assembly and is provided for workers to ride in; A battery component (40) is installed at the front of the cabin (30) to supply power to the electric tractor; A hydraulic system (50), installed at the rear of the cockpit (30), drives the working machinery; and A three-point suspension mechanism (70) is installed at the rear of the hydraulic system (50) to allow the working machine to be attached to it. in, The cockpit (30) is mounted on the upper frame between the battery component (40) and the hydraulic system (50). The heat sink (60) for cooling the battery component (40) is installed at the front of the battery component (40). The front wheel component drives the front wheel axle (13) connected to the front wheel drive transmission mechanism (12) via the front wheel drive motor (11) and the front wheel drive transmission mechanism (12). The rear wheel assembly drives the rear wheel axle (23) connected to the rear wheel drive transmission mechanism (22) via the rear wheel drive motor (21) and the rear wheel drive transmission mechanism (22). The hydraulic system (50) is driven by the rear-wheel drive motor (21) and does not have an additional independent motor to provide power to the working machine.

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