Fan system of electric excavator

Abstract

The utility model discloses an electric excavator fan system which comprises a vehicle body controller, the vehicle body controller is respectively connected with a fan controller and a whole vehicle controller, the fan controller is connected with the whole vehicle controller, and the fan controller is connected with an electronic fan. The fan controller is arranged to be matched with the vehicle body controller and the whole vehicle controller, the electronic fan connected to the fan controller can be effectively controlled, temperature information collected by the temperature sensor is sent to the fan controller, different modulation signal waves are sent according to the control logic of the fan controller, and therefore speed regulation of the electronic fan is achieved. And the control capability of the electronic fan is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a fan system of an electric excavator. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] The excavator fan is a very important part of the excavator cooling system. It draws air into the engine compartment and drives the hot air out of the radiator, which plays a good cooling role. Therefore, the fan can help the excavator maintain a stable temperature and ensure that its working efficiency and performance will not be affected by excessive temperature. If there is a problem with the excavator fan, it may cause the excavator to overheat or even malfunction, affecting working efficiency and increasing maintenance costs.

[0004] At present, the wiring of the fan system of electric excavators is complicated, and most of the signals are one-to-one. Each signal corresponds to a wire, the number of wiring harnesses is huge, the wiring method is messy, and the number of connectors is large. In actual excavation work, due to the harsh working environment and the frequent vibrations of the excavator during operation, the connectors are easy to loosen and the reliability is poor.

[0005] In the traditional wiring method, the body control module (BCM) controls the electronic fan independently, and the vehicle control unit (VCU) receives the fault feedback signal from the electronic fan. This decentralized control method of two control systems has poor integration, and when the electronic fan is working, the signal line and the control line are mixed together, and the anti-interference ability is poor.

[0006] In addition, some excavators start to rotate their electronic fans after they are started, which consumes a lot of electricity and increases electricity costs. Utility Model Content

[0007] The purpose of the utility model is to provide an electric excavator fan system. By setting a fan controller, cooperating with a body controller and a whole vehicle controller, the electronic fan connected to the fan controller can be effectively controlled, and the temperature information collected by the temperature sensor is sent to the fan controller, and different modulation signals are sent with its control logic, thereby realizing the start and stop and speed regulation of the electronic fan, and further improving the control ability of the electronic fan.

[0008] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0009] In a first aspect, an embodiment of the utility model provides an electric excavator fan system, including a body controller, wherein the body controller is respectively connected to a fan controller and a vehicle controller, wherein the fan controller is connected to the vehicle controller, and the fan controller is connected to an electronic fan.

[0010] As a further technical solution, a power supply is also included, and the power supply is connected to the vehicle body controller and the electronic fan.

[0011] As a further technical solution, a fast-fuse fuse is provided in the circuit connecting the power supply and the electronic fan.

[0012] As a further technical solution, the vehicle controller is connected to a temperature sensor.

[0013] As a further technical solution, the vehicle body controller includes a vehicle body controller connection end connected to the power supply, a fan controller connection end connected to the fan controller, and a vehicle controller connection end connected to the vehicle controller.

[0014] As a further technical solution, the fan controller includes a fan controller power connection terminal, a fan signal feedback terminal, a fan modulation signal terminal, and a fan controller CAN terminal.

[0015] As a further technical solution, the fan controller power connection end is connected to the fan controller connection end of the vehicle body controller; the fan signal feedback end and the fan modulation signal end are respectively connected to the electronic fan; and the fan controller CAN end is connected to the vehicle controller.

[0016] As a further technical solution, the vehicle controller includes a vehicle controller power connection terminal, a vehicle controller CAN terminal, and a radiator temperature detection terminal.

[0017] As a further technical solution, the vehicle controller power connection end is connected to the vehicle controller connection end of the body controller; the vehicle controller CAN end is connected to the fan controller CAN end; the radiator temperature detection end is connected to the temperature sensor.

[0018] As a further technical solution, the power source adopts a 24V battery.

[0019] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:

[0020] 1. The utility model provides an electric excavator fan system, which optimizes the existing electric excavator fan system with complex wiring, simplifies the number of wiring harnesses, and improves the signal integration processing capability.

[0021] 2. Through the above arrangement, the utility model also solves the problem of poor integration of the traditional wiring method in which the body controller (BCM) controls the electronic fan separately and the vehicle controller (VCU) receives the fault feedback signal from the electronic fan. At the same time, it also avoids the problem of poor system anti-interference ability caused by mixing signal lines and control lines.

[0022] 3. The utility model can detect the temperature of the radiator in the vehicle controller by setting a temperature sensor connected to the vehicle controller, and feed back the signal to the vehicle controller and further to the fan controller. The fan controller controls the electronic fan to send a modulation signal according to the temperature feedback signal, so that the electronic fan can operate adaptively according to the actual working conditions of the electric excavator, greatly improving the working efficiency of the fan and avoiding energy waste caused by the electronic fan starting at the same time as the electric excavator starts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0024] Figure 1 The utility model is a circuit structure diagram of a fan system of an electric excavator.

[0025] The schematic diagram is for illustrative purposes only;

[0026] Among them, 1. Body controller; 2. Vehicle controller; 3. Temperature sensor; 4. Electronic fan; 5. Fan controller; 6. Fast-fuse fuse; 7. Power supply. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0028] Example 1

[0029] In a typical implementation of the present invention, Figure 1As shown, a fan system for an electric excavator is provided, including a body controller 1, the body controller 1 is respectively connected to a fan controller 5 and a vehicle controller 2, the fan controller 5 is connected to the vehicle controller 2, and the fan controller 5 is connected to an electronic fan 4. Among them, the body controller 1 adopts a BCM controller, the vehicle controller 2 adopts a VCU controller, and the fan controller 5 adopts an ATS controller. The above three controllers are combined and connected using existing controllers. It is an existing technology for the current electric excavator to use a BCM controller as the body controller 1 and a VCU controller as the vehicle controller 2. The specific model of the controller can be selected independently according to the actual use.

[0030] By setting the body controller 1 to be connected to the fan controller 5 and the vehicle controller 2 respectively, the fan controller 5 and the vehicle controller 2 are connected, the fan controller 5 is connected to the electronic fan 4, and the fan controller 5 is set to one, the existing electric excavator fan system with complex wiring is optimized, the number of wiring harnesses is simplified, and the signal integration processing capability is improved.

[0031] At the same time, the invention solves the problem of poor integration of the traditional wiring method in which the body controller 1 (BCM) controls the electronic fan 4 independently and the vehicle controller 2 (VCU) receives the fault feedback signal sent by the electronic fan 4. It also avoids the problem of poor anti-interference ability of the system caused by mixing signal lines and control lines.

[0032] It also includes a power supply 7 , which is connected to the vehicle body controller 1 and the electronic fan 4 .

[0033] In the circuit connecting the power supply 7 and the electronic fan 4, a fast-fuse fuse 6 is provided. The fast-fuse fuse 6 is connected to the positive electrode of the power supply 7 and the electronic fan 4. When an overload current passes through the circuit, the fast-fuse fuse 6 can be directly blown to disconnect the power supply 7 from the electronic fan 4, cut off the power supply end of the electronic fan 4, and stop the operation of the electronic fan 4 from the power supply.

[0034] The vehicle controller 2 is connected to a temperature sensor 3. With this arrangement, the temperature of the radiator in the vehicle controller 2 can be detected, and the signal can be fed back to the vehicle controller 2 and further fed back to the fan controller 5. The fan controller 5 controls the electronic fan 4 by sending a modulation signal according to the temperature feedback signal, so that the electronic fan 4 can operate adaptively according to the actual working conditions of the electric excavator, greatly improving the working efficiency of the electronic fan 4 and avoiding the energy waste of the electronic fan 4 starting at the same time as the electric excavator. The above-mentioned vehicle controller 2, temperature sensor 3, and fan controller 5 are all connected and controlled by existing controllers and sensors. The specific model can be independently selected according to the actual use situation, and the signal flow between the sensor and the controller and the functions that can be realized are all existing technologies.

[0035] The vehicle body controller 1 includes a vehicle body controller connection end connected to the power supply 7 , a fan controller connection end connected to the fan controller 5 , and a vehicle controller connection end connected to the vehicle controller 2 .

[0036] The fan controller 5 comprises a fan controller power connection terminal, a fan signal feedback terminal, a fan modulation signal terminal, and a fan controller CAN terminal.

[0037] Among them, the fan controller power connection end is connected to the fan controller connection end of the vehicle body controller 1; the fan signal feedback end and the fan modulation signal end are respectively connected to the electronic fan 4; and the fan controller CAN end is connected to the vehicle controller 2.

[0038] The vehicle controller 2 includes a vehicle controller power connection terminal, a vehicle controller CAN terminal, and a radiator temperature detection terminal.

[0039] The vehicle controller power connection terminal is connected to the vehicle controller connection terminal of the vehicle body controller 1; the vehicle controller CAN terminal is connected to the fan controller CAN terminal; the radiator temperature detection terminal is connected to the temperature sensor 3.

[0040] The power source 7 adopts a 24V battery, and the fan controller 5 is set to one.

[0041] The vehicle body controller 1 is connected to a 24V battery and is directly powered by a power supply 7. The vehicle controller 2, including the fan controller 5, is powered by the vehicle body controller. The vehicle body controller 1 outputs 24V electricity to the output pin of the vehicle controller 2. The electrical signal output terminal of the vehicle body controller 1 continuously outputs a high-level current, and the ground terminal is grounded. The vehicle body controller 1 supports CAN bus wake-up and switch wake-up, and the vehicle body controller has its own electronic insurance to prevent other components from overloading and causing the wire to burn, and the insurance can be reused. The fan controller 5 is connected to the vehicle controller 2 with a CAN bus. After receiving the temperature signal collected by the temperature sensor 3, the vehicle controller 2 sends data to the fan controller 5 in the form of a message. After receiving the signal, the fan controller 5 adjusts the duty cycle of the modulation signal (PWM) and modulates the PWM wave through the output port to transmit it to the electronic fan 4. The electronic fan 4 uses this to complete different speeds and start and stop actions.

[0042] When the electronic fan 4 fails, such as the fan is blocked, the electronic fan 4 will send fault information through the fault feedback port, and the fan controller 5 will perform corresponding response operations after receiving the fault information.

[0043] It is understandable that the above functions are all achievable by the existing electric excavator whole machine or body controller 1, vehicle controller 2, fan controller 5, and electronic fan 4, and the present utility model does not involve improvements in software or algorithms.

[0044] The body controller 1, the vehicle controller 2, the fan controller 5, and the grounding terminal of the electronic fan 4 are connected to the vehicle platform through a grounding wire to avoid being directly connected to the negative pole of the power supply, thereby optimizing the wiring harness layout.

[0045] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electric excavator fan system, characterized in that: It comprises a vehicle body controller, the vehicle body controller is respectively connected to a fan controller and a vehicle controller, the fan controller is connected to the vehicle controller, and the fan controller is connected to an electronic fan.

2. The electric excavator fan system according to claim 1, characterized in that: A power supply is also included, and the power supply is connected to the vehicle body controller and the electronic fan.

3. The electric excavator fan system according to claim 2, characterized in that: A fast-fuse fuse is provided in the circuit connecting the power supply and the electronic fan.

4. The electric excavator fan system according to claim 1, characterized in that: The vehicle controller is connected to a temperature sensor.

5. The electric excavator fan system according to claim 1, characterized in that: The vehicle body controller includes a vehicle body controller connection end connected to a power source, a fan controller connection end connected to a fan controller, and a vehicle controller connection end connected to a vehicle controller.

6. The electric excavator fan system according to claim 1, characterized in that: The fan controller comprises a fan controller power connection terminal, a fan signal feedback terminal, a fan modulation signal terminal, and a fan controller CAN terminal.

7. The electric excavator fan system according to claim 6, characterized in that: The fan controller power supply connection end is connected to the fan controller connection end of the vehicle body controller; the fan signal feedback end and the fan modulation signal end are respectively connected to the electronic fan; and the fan controller CAN end is connected to the vehicle controller.

8. The electric excavator fan system according to claim 1, characterized in that: The vehicle controller includes a vehicle controller power connection terminal, a vehicle controller CAN terminal, and a radiator temperature detection terminal.

9. The electric excavator fan system according to claim 8, characterized in that: The vehicle controller power connection end is connected to the vehicle controller connection end of the vehicle body controller; the vehicle controller CAN end is connected to the fan controller CAN end; the radiator temperature detection end is connected to the temperature sensor.

10. The electric excavator fan system according to claim 2, characterized in that: The power supply adopts a 24V battery; the fan controller is set to one.

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