Axle housing temperature monitoring and early warning device and electric drive mining dump truck

Abstract

The utility model discloses an axle housing temperature monitoring and early warning device and an electric drive mining dump truck. The axle housing temperature monitoring and early warning device comprises a main controller, a temperature sensor, a photosensitive sensor, a warning component and a power source used for supplying power. The plurality of temperature sensors are located in the axle housing, are placed around the high-temperature radiation point, are electrically connected with the main controller respectively, and transmit the monitored real-time temperature in the axle housing to the main controller; the photosensitive sensor is located in the axle housing and is arranged near a flammable point, and the photosensitive sensor is electrically connected with the main controller and transmits a received illumination intensity signal to the main controller; the warning component is connected with the main controller and used for displaying the temperature value in the axle housing in real time and giving an alarm to a driver when the temperature value in the axle housing exceeds a set threshold value and the photosensitive sensor acts. According to the utility model, through multi-azimuth and multi-angle temperature monitoring, the monitoring precision of the internal temperature of the axle housing can be greatly improved, and the temperature change trend can be mastered at any time.

Description

Technical Field

[0001] The utility model relates to a bridge housing temperature monitoring and early warning device, belonging to the technical field of electric drive mining dump trucks. Background Art

[0002] Electric-driven mining dump trucks, as off-highway transport vehicles, are widely used in large open-pit mines and large-scale civil engineering projects. Their operating environments are often extreme and complex, and their product positioning dictates their inherent operating mode: long, uninterrupted, and high-load operation. Under these harsh operating conditions, the electric wheels, located in the relatively confined space within the axle housing, often become a source of high-temperature radiation due to frequent braking, causing a sharp increase in the internal temperature of the axle housing. This poses a threat to the proper operation of the electric wheels, as well as other high- and low-voltage wiring harnesses and electrical components within the axle housing. Therefore, real-time high-temperature monitoring of the internal axle housing is essential.

[0003] Currently, electric-drive mining dump trucks typically only monitor the temperature of the electric wheel drive bearings and stators. Monitoring of the oil within the electric wheel is insufficient, and the impact of the overall internal axle housing temperature on other operating components is overlooked. This can lead to the axle housing temperature remaining within the operating range of the electric wheel but exceeding the operating temperature range of other electrical components, or exceeding the normal operating temperature of the electric wheel. Failure to promptly implement relevant monitoring and treatment measures could lead to significant hidden dangers. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a bridge housing temperature monitoring and early warning device to monitor the overall space temperature inside the bridge housing.

[0005] The utility model is implemented according to the following technical solutions:

[0006] In a first aspect, the present invention provides an axle housing temperature monitoring and early warning device, comprising:

[0007] Main controller, with data processing function;

[0008] A plurality of temperature sensors are located in the axle housing and are placed around the high-temperature radiation point. The plurality of temperature sensors are electrically connected to the main controller respectively to transmit the real-time temperature of the monitored axle housing to the main controller;

[0009] At least one photosensor is located in the axle housing and arranged near the ignition point, the at least one photosensor is electrically connected to the main controller and transmits a received light intensity signal to the main controller;

[0010] A warning component connected to the main controller is used to display the temperature value in the axle housing in real time and to issue an alarm to the driver when the temperature value in the axle housing exceeds a set threshold and the photosensor is activated;

[0011] The power supply for power supply is electrically connected to the main controller, the temperature sensor, the photosensor and the warning component respectively.

[0012] In some embodiments, the warning component includes:

[0013] Display screen, used to display real-time temperature data and reminder text to turn off the engine and cool down;

[0014] The alarm is electrically connected to the main controller, and when the light sensor is actuated and issues an instruction, the main controller controls the output of an early warning.

[0015] In some embodiments, when multiple temperature sensors monitor that the internal temperature of the bridge housing has reached the lower limit of the dangerous temperature and the photosensor is not activated, the main controller displays the temperature data to the driver through the control display screen and reminds the driver to turn off the engine and cool down; when multiple temperature sensors monitor that the internal temperature of the bridge housing has reached the lower limit of the dangerous temperature and the photosensor is activated, the main controller warns the driver by controlling the alarm; when multiple temperature sensors monitor that the internal temperature of the bridge housing is between the upper limit of the normal temperature and the upper limit of the warning temperature, the controller displays the temperature data to the driver through the control display screen, and when the internal temperature of the bridge housing is still within the warning temperature range within a preset time, the controller reminds the driver to turn off the engine and cool down through the control display screen.

[0016] In some embodiments, the alarm is an audible and visual alarm, and the main controller controls the output of audible and visual warnings.

[0017] In some embodiments, the main controller is connected to the display screen via a CAN communication network for providing a physical network line for data communication.

[0018] In some embodiments, the CAN communication network is composed of two 120Ω resistors connected end to end, one side of the line is the CAN_H line, and the other side is the CAN_L line. The CAN_H port of the main controller and the display screen is connected to the CAN_H line of the CAN communication network, and the CAN_L port of the main controller and the display screen is connected to the CAN_L line of the CAN communication network, thereby forming a communication loop.

[0019] In some embodiments, a main power isolation switch is connected in series between the power supply and the circuits of the main controller, temperature sensor, photosensor, and warning component to realize the on and off of the power supply circuit.

[0020] In some embodiments, the power supply is composed of two groups of 24V power supply modules connected in parallel, and each group of 24V power supply modules is composed of two 12V batteries connected in series.

[0021] In a second aspect, the utility model provides an electric drive mining dump truck, comprising an axle housing, in which the above-mentioned axle housing temperature monitoring and early warning device is installed.

[0022] Beneficial effects of the utility model:

[0023] 1. Use multiple temperature sensors for temperature monitoring at the same time. Place them around the high-temperature radiation source within a certain distance. This approach can more accurately monitor the temperature inside the bridge housing.

[0024] 2. The combination of temperature sensor and light sensor greatly improves driving safety.

[0025] 3. The bridge housing temperature is divided into three levels, with corresponding treatment measures corresponding to different levels, and refined control is more in line with actual applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are part of this utility model and are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be derived from these drawings without inventive effort.

[0027] In the attached figure:

[0028] Figure 1 This is the electrical schematic diagram of the bridge housing temperature monitoring and early warning device of the present utility model;

[0029] Figure 2 This is a working flow chart of the bridge housing temperature monitoring and early warning device of the present utility model.

[0030] Figure identification: 10 - power supply, 20 - main power isolating switch, 30 - display screen, 40 - CAN communication network, 50 - sound and light alarm, 60 - photosensor, 70 - main controller, 80 - temperature sensor.

[0031] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0033] like Figure 1 As shown, a bridge housing temperature monitoring and early warning device includes a main controller 70, multiple temperature sensors 80, at least one photosensor 60, a warning component and a power supply 10 for power supply; the main controller 70 has a data processing function; multiple temperature sensors 80 are located in the bridge housing and are placed around the high-temperature radiation point. The multiple temperature sensors 80 are electrically connected to the main controller 70 respectively, and the real-time temperature in the monitored bridge housing is transmitted to the main controller 70; at least one photosensor 60 is located in the bridge housing and is arranged near the flammable point. At least one photosensor 60 is electrically connected to the main controller 70 and transmits the received light intensity signal to the main controller 70; the warning component is connected to the main controller 70, and is used to display the temperature value in the bridge housing in real time and to issue an alarm to the driver when the temperature value in the bridge housing exceeds a set threshold and the photosensor 60 is activated; the power supply 10 is electrically connected to the main controller 70, the temperature sensor 80, the photosensor 60 and the warning component respectively.

[0034] The above-mentioned warning component is further explained below.

[0035] Continue to refer to Figure 1 As shown, the warning component includes a display screen 30 and an alarm. The display screen 30 is used to display real-time temperature data and a text reminding to turn off the engine and cool down. The alarm is electrically connected to the main controller 70. When the light sensor 60 is activated and issues an instruction, the main controller 70 controls the output of the warning.

[0036] In a preferred solution, the alarm device adopts an audible and visual alarm device 50 , which is controlled by a main controller 70 to output audible and visual warnings.

[0037] For further solutions, please refer to Figure 1 As shown, the main controller 70 is connected to the display screen 30 via a CAN communication network 40 for providing a physical network line for data communication.

[0038] The above-mentioned CAN communication network is further explained below.

[0039] Continue to refer to Figure 1 As shown, the CAN communication network 40 is composed of two 120Ω resistors connected end to end, one side of the line is the CAN_H line, and the other side is the CAN_L line. The CAN_H port of the main controller 70 and the display screen 30 is connected to the CAN_H line of the CAN communication network 40, and the CAN_L port of the main controller 70 and the display screen 30 is connected to the CAN_L line of the CAN communication network 40, thereby forming a communication loop.

[0040] For further solutions, please refer to Figure 1As shown, a main power isolation switch 20 is connected in series between the power supply 10 and the main controller 70, the temperature sensor 80, the photosensor 60, and the warning component to realize the on-off of the power supply line.

[0041] The above power supply is further described below.

[0042] Continue to refer to Figure 1 As shown, the power supply 10 is composed of two groups of 24V power supply modules connected in parallel, and each group of 24V power supply modules is composed of two 12V batteries connected in series.

[0043] For further solutions, please refer to Figure 1 As shown, the display's power supply is powered by the power supply via the main power isolation switch, and its ground port is directly connected to ground. CAN communication ports CAN_H and CAN_L are connected to the CAN communication network's CAN_H and CAN_L lines, respectively. The temperature sensor's power supply is powered by the power supply via the main power isolation switch, and its ground port is directly connected to ground. Port AO (port 3) is connected to port AI (port 1) of the main controller, providing real-time temperature analog feedback to the main controller. The light sensor's power supply is powered by the power supply via the main power isolation switch, and its ground port is directly connected to ground. Port DO (port 3) is connected to port DI:1 (port 1) of the main controller, providing light intensity feedback to the main controller. The audible and visual alarm's power supply is powered by the power supply via the main power isolation switch, and its ground port is directly connected to ground. Port DI (port 3) is connected to port DO:1 (port 1) of the main controller, receiving alarm signals from the main controller.

[0044] The main controller includes:

[0045] Digital output port DO:1 is connected to port DI 3 of the sound and light alarm for power output, making the sound and light alarm sound.

[0046] Digital input port DI:1 is connected to port DI 3 of the light sensor to receive light intensity signals for logic processing;

[0047] The analog input ports AI:1, AI:2, AI:3, and AI:4 are respectively connected to the No. 3 port AO of the temperature sensor to receive the feedback signal from the temperature sensor and process the bridge housing temperature in real time;

[0048] CAN communication ports CAN_H and CAN_L are connected to the CAN communication network CAN_H and CAN_L lines respectively;

[0049] The power supply port is powered by the power supply through the main power isolation switch, and the grounding port is directly grounded.

[0050] The working process of the above-mentioned axle housing temperature monitoring and early warning device is given below:

[0051] like Figure 2 As shown in the figure, inside the axle housing, for the existing high-temperature radiation points (such as brake discs), within a certain range, four (or more) temperature sensors are installed around them in space to monitor their temperatures from multiple directions and angles; at the same time, a photosensitive sensor is arranged within a suitable distance from the ignition point to monitor the situation of the ignition point according to the light intensity. During driving, since the inside of the axle housing is a closed space and is default in a dark state, when the temperature is too high and causes a fire at the ignition point, it will cause the photosensitive sensor to act, so that the sound and light alarm acts to issue an alarm; a sound and light alarm and a display are arranged at a suitable position in the cab; the main controller and the CAN communication network are arranged in the weak electrical cabinet, and the power supply is arranged in the power supply box. The wiring details of the above devices are wired according to the above instructions.

[0052] The temperature T inside the axle housing is divided into three grade ranges:

[0053] 1. T < T0: Normal temperature, indicating that the temperature inside the axle housing is within the normal range, and T0 is the upper limit value of the normal temperature;

[0054] 2. T0 < T < T1: Warning temperature, indicating that the temperature inside the axle housing is above the normal temperature, and T1 is the upper limit value of the warning temperature. Staying within this temperature range for a certain period of time will not cause electrical component failures and thus threaten driving safety;

[0055] 3. T > T: Dangerous temperature, indicating that the temperature inside the axle housing is above the warning temperature, and T1 is the lower limit value of the dangerous temperature. Once reaching this temperature range, the electrical components inside the axle housing will be irreversibly damaged, and even a fire accident will seriously threaten driving safety.

[0056] After the driver powers on and starts driving, the above electrical components will work. The temperature sensors continuously monitor the surrounding temperature of the high-temperature radiation points and feed the temperature data back to the main controller, which analyzes and processes the data. Subsequently, the data is sent to the display screen through the CAN communication network, and the display screen shows the data for the driver to view. At the same time, the previous temperature data is queried in the controller to determine whether it has been continuously in the warning temperature range for two hours. If it has been continuously in the warning temperature range for two hours, the driver will be reminded on the display screen to pull over to the side of the road to cool down the axle housing. If there has been no situation of continuously being in the warning temperature range for two hours before, the current temperature T is judged for its grade:

[0057] 1. If the current temperature T is greater than T1, it is in the dangerous temperature range. Then, corresponding actions are taken according to whether the sound and light alarm has acted: If the sound and light alarm has not acted, the driver will be reminded on the screen to pull over to the side of the road to cool down the axle housing, and the logic ends here; if the sound and light alarm has acted, it indicates that a fire has occurred inside the axle housing, the vehicle will automatically stop and shut down immediately, and the driver will immediately extinguish the fire inside the axle housing, and the logic ends here.

[0058] 2. If the current temperature T is not greater than T1, the system then determines whether it is greater than T0. If it is not greater than T0, it indicates that the current temperature T is within the normal temperature range. Driving should continue normally without any action required. If the current temperature T is greater than T0, it indicates that the current temperature T is within the warning temperature range. Driving should continue, and the controller will record the temperature data. Temperature monitoring will continue after this point, but the temperature will be recorded every ten minutes for two hours after this point. If the temperature remains within the warning range for two consecutive hours, the driver will be prompted to pull over and cool the axle housing. This concludes the logic. If two consecutive normal temperature records appear during the two-hour temperature recording period, it is assumed that the axle housing temperature has returned to normal within the previous twenty minutes. The temperature recording for that period will be canceled, and driving should continue normally.

[0059] In summary, to expand the number of monitoring points for the electric wheel and simultaneously monitor the overall internal temperature of the axle housing, the present invention provides an axle housing temperature warning device for an electric-driven mining dump truck. Four temperature sensors are placed spatially around a high-temperature radiation source at a specific distance, enabling more accurate monitoring of the internal temperature of the axle housing. Light sensors are placed within a suitable distance of the ignition point to monitor the ignition point based on light brightness. An audible and visual alarm is also located in the cab. The light sensor signals are collected and input into a main controller. After logical processing, the main controller outputs an enable signal to activate the audible and visual alarm only when the temperature is within the dangerous temperature range and the light sensor is activated. The main controller communicates with other components, such as the display, via a high-speed CAN network, ensuring excellent communication performance and high reliability. The internal temperature of the axle housing is classified into three levels: normal, warning, and dangerous. Different control measures are implemented for different temperatures. When the temperature is within the normal range, normal operation is maintained. When the temperature is within the warning range, operation can continue, but the temperature within the warning range is sampled and recorded. For a period of time after this recording (e.g., two hours), the axle housing temperature is monitored in real time and recorded every ten minutes. If it remains within the warning range continuously within these two hours, a screen prompt will appear to remind the driver to pull over and cool the axle housing. If two consecutive normal temperature records appear during the temperature recording process, it is assumed that the axle housing has returned to normal within the past twenty minutes, and the temperature record for this period is canceled. The control logic will repeat again when the warning temperature is reached. If the temperature enters the danger range, if both the audible and visual alarms activate simultaneously, it indicates that a fire has occurred in the vehicle's axle housing. The vehicle must be stopped immediately, and the driver must exit to extinguish the fire. If the temperature remains within the danger range without the audible and visual alarms, a screen prompt will appear to remind the driver to pull over and cool the axle housing.

[0060] The electric drive mining dump truck provided by the present invention is described below. The electric drive mining dump truck described below and the bridge housing temperature monitoring and early warning device described above can be referred to each other.

[0061] The utility model provides an electric drive mining dump truck, which may include the bridge housing temperature monitoring and early warning device as described in any one of the above embodiments.

[0062] The beneficial effects achieved by the electric drive mining dump truck provided by the present invention are consistent with the beneficial effects achieved by the bridge housing temperature monitoring and early warning device provided by the present invention, and will not be described in detail here.

[0063] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0064] Furthermore, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are also intended to fall within the scope of protection of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art will be able to use them in combination based on the known technical solutions and the technical problems to be solved by this application.

[0065] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments using the above-mentioned technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A bridge housing temperature monitoring and early warning device, characterized in that: include: Main controller, with data processing function; A plurality of temperature sensors are located in the axle housing and are placed around the high-temperature radiation point. The plurality of temperature sensors are electrically connected to the main controller respectively to transmit the real-time temperature of the monitored axle housing to the main controller; At least one photosensor is located in the axle housing and arranged near the ignition point, the at least one photosensor is electrically connected to the main controller and transmits a received light intensity signal to the main controller; A warning component connected to the main controller is used to display the temperature value in the axle housing in real time and to issue an alarm to the driver when the temperature value in the axle housing exceeds a set threshold and the photosensor is activated; The power supply for power supply is electrically connected to the main controller, the temperature sensor, the photosensor and the warning component respectively.

2. The axle housing temperature monitoring and early warning device according to claim 1, characterized in that: The warning component includes: Display screen, used to display real-time temperature data and reminder text to turn off the engine and cool down; The alarm is electrically connected to the main controller, and when the light sensor is actuated and issues an instruction, the main controller controls the output of an early warning.

3. The axle housing temperature monitoring and early warning device according to claim 2, characterized in that: When multiple temperature sensors detect that the internal temperature of the axle housing has reached the lower limit of the dangerous temperature and the light sensor is not activated, the main controller displays the temperature data and prompts the driver to turn off the engine and cool down through the control display screen; When the temperature inside the axle housing is detected by multiple temperature sensors to reach the lower limit of the dangerous temperature and the light sensor is activated, the main controller controls the alarm to warn the driver; When multiple temperature sensors detect that the internal temperature of the bridge housing is between the normal temperature upper limit and the warning temperature upper limit, the controller displays the temperature data to the driver through the control display screen, and when the internal temperature of the bridge housing is still within the warning temperature range within a preset time, the controller reminds the driver to turn off the engine and cool down through the control display screen.

4. The axle housing temperature monitoring and early warning device according to claim 2, characterized in that: The alarm is an audible and visual alarm, which is controlled by a main controller to output audible and visual warnings.

5. The axle housing temperature monitoring and early warning device according to claim 2, characterized in that: The main controller is connected to the display screen via a CAN communication network for providing a physical network line for data communication.

6. The axle housing temperature monitoring and early warning device according to claim 5, characterized in that: The CAN communication network is composed of two 120Ω resistors connected end to end, one side of the line is the CAN_H line, and the other side is the CAN_L line. The CAN_H port of the main controller and the display screen is connected to the CAN_H line of the CAN communication network, and the CAN_L port of the main controller and the display screen is connected to the CAN_L line of the CAN communication network, thereby forming a communication loop.

7. The axle housing temperature monitoring and early warning device according to claim 1, characterized in that: A main power supply isolation switch is connected in series between the power supply and the circuits of the main controller, temperature sensor, photosensor and warning component to realize the on-off of the power supply circuit.

8. The axle housing temperature monitoring and early warning device according to claim 1, characterized in that: The power supply is composed of two groups of 24V power supply modules connected in parallel, and each group of 24V power supply modules is composed of two 12V batteries connected in series.

9. An electric drive mining dump truck, comprising an axle housing, characterized in that: The axle housing is installed with the axle housing temperature monitoring and early warning device according to any one of claims 1 to 8.

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