Oil level display device, method and engineering machinery

Abstract

The present invention discloses an oil level display device, method and process machinery, including a liquid level switch for fixed-point oil level monitoring, an oil float level gauge for oil level interval measurement, a centralized filling panel and indicator light for filling; the oil tank is fixed on the engineering machinery vehicle; three holes, high, middle and low, are opened on the side of the oil tank; the liquid level switch is inserted and fixed from the high and middle holes of the oil tank; bolts and washers are inserted and fixed from the low hole on the side of the oil tank through the oil float level gauge and the sealing ring; an oil filling head is assembled on the centralized filling panel, one end of the oil filling pipe is connected to the oil filling port of the centralized filling panel, and the other end is connected to the oil tank; the indicator light is fixed on the centralized filling panel and can be raised and lowered simultaneously with the centralized filling panel. When a single maintenance personnel is filling, there is no need to keep an eye on the display screen in the cab, and a single person can complete the filling of oil to the specified height. At the same time, this method has the advantages of low cost, easy use and high reliability.

Description

Technical Field

[0001] The present invention relates to an oil level display device and method, and in particular to a device and method used in the field of engineering machinery, which can accurately display the oil level in a cab and at a centralized filling location. Background Art

[0002] For many large-scale construction machinery, the fuel tank is designed to hold more than the oil required during a refueling cycle. Consequently, the tank is typically large and deep. While the long-rod oil float sensors used to monitor the oil level offer high accuracy and provide consistent level information, they are very long and expensive. Furthermore, when the vehicle vibrates significantly, the long-rod oil float sensors are subject to significant impact from the oil, making their structure susceptible to damage. Furthermore, their length makes installation and removal inconvenient. In practice, real-time oil level monitoring is unnecessary; it is only necessary to monitor the level once it has dropped to a certain level. Furthermore, existing technology requires two people to refuel: one to refuel while the other monitors the display from inside the cab, a waste of time and resources. Summary of the Invention

[0003] The technical problem to be solved by this invention is to overcome the shortcomings of the existing technology and provide a device that, while having slightly lower display accuracy in some liquid level areas, is less expensive, safer, and more reliable than traditional long-rod oil float sensors. It also provides detailed display of the oil level areas of interest to customers. Furthermore, when the customer is refilling the oil, a single person can monitor the oil level from the ground, displaying it in three states, allowing the customer to select the desired refill amount.

[0004] The present invention is achieved according to the following technical solutions:

[0005] The present invention provides an oil level display device, comprising a liquid level switch for fixed-point monitoring of the oil level, an oil float level gauge for measuring the oil level interval, and a centralized filling panel and indicator light for filling; three holes, high, middle and low, are opened on the side of the oil tank; the liquid level switch is inserted and fixed from the high and middle holes of the oil tank, and the oil float level gauge is inserted and fixed from the low hole of the oil tank; an oil filling head is assembled on the centralized filling panel, one end of the oil filling pipe is connected to the oil filling port of the centralized filling panel, and the other end is connected to the oil tank; the indicator light is fixed on the centralized filling panel; the liquid level switch and the oil float level gauge are connected to a controller, and the controller parses the input signal and converts it into an output signal, outputs it to the display screen, and controls the indicator light to display at the same time.

[0006] Furthermore, the oil tank includes a main oil tank body and an auxiliary oil tank body, and the main and auxiliary oil tank bodies are interconnected; a breather is installed on the top of the main oil tank body, and oil is filled from the bottom of the auxiliary oil tank body.

[0007] Furthermore, three holes, high, medium and low, are arranged on the main oil tank body; a switch fixing seat is installed on the high and medium holes, and the liquid level switch is fixed on the switch fixing seat; a sensor fixing seat is installed on the low hole, and the oil float level gauge is installed on the sensor fixing seat through bolts and washers, and a sealing ring is installed between the oil float level gauge and the sensor fixing seat.

[0008] Furthermore, the oil filling head has a one-way valve function to prevent the oil from flowing back.

[0009] Furthermore, the oil level indicated by the high-position hole of the fuel tank must ensure that the oil will not overflow from the breather above the fuel tank when the vehicle is located on the maximum slope allowed for operation; the oil level indicated by the middle-position hole of the fuel tank can meet the oil usage required for one refueling cycle of the construction machinery.

[0010] Furthermore, the oil float level gauge outputs different voltages corresponding to different liquid levels within its measuring range (the area from point C to point G). The controller can directly parse the corresponding liquid level through the different voltage values ​​output by the oil float level gauge.

[0011] Furthermore, when displaying the liquid level, the display screen is divided into several intervals. The area exceeding the high liquid level switch (above point A) is set as interval one, the area between the high and low liquid level switches (point A to point B) is set as interval two, the area from the low liquid level switch to a certain depth below the highest scale of the oil float level gauge (area B to D) is set as interval three, the area from a certain depth below the highest scale of the oil float level gauge (point D) to a certain depth above the lowest scale (point F) is divided into several intervals (interval three to interval N), and the area below a certain depth above the lowest scale of the oil float level gauge (point F) is set as an alarm area.

[0012] Furthermore, the invention further comprises the following steps:

[0013] a. When the liquid level is higher than point A of the high level switch, the controller receives signals from the two level switches and the oil float level gauge, outputs them to the display screen, and lights up all the backlights in intervals 1 to N on the display screen, indicating that the current oil level is FULL (full);

[0014] b. When the liquid level drops to the A-B area, the controller receives the signal from the low level switch and the oil float level gauge, and outputs it to the display screen, turning off the backlight of zone 1 and lighting up all zones 2 to N.

[0015] c. When the liquid level is lower than the low level switch, the controller only receives the signal from the oil float level gauge, and the controller outputs it to the display screen, turning off the backlights of intervals 1 and 2, and lighting up the backlights of intervals 3 to N;

[0016] d. Within its measuring range (C-G), the oil float level gauge can output different voltage signals (X1-X2) for different liquid levels. As the liquid level drops to point D, the output voltage of the oil float level gauge reaches the set value X3 (X3∈[X1,X2]). The controller outputs a signal to the display, and the backlight of interval 3 on the display goes out, while the backlights of intervals 4 to N continue to light.

[0017] e. For the liquid level area from point D to point F, the output voltage of the oil float level gauge is [X3, X4] ([X3, X4]∈[X1, X2]). The liquid level between D and F is divided into several intervals. Each interval corresponds to a different output voltage. The display can be divided into an equal number of intervals four to N for display. As the liquid level gradually decreases, the output voltage of the oil float level gauge gradually changes, and the backlight of intervals four to N on the display gradually goes out.

[0018] f. When the liquid level is lower than the alarm point F, the oil level will soon be exhausted, the red backlight in the oil level alarm area on the display starts flashing, and an audible alarm is given, prompting that oil must be added at this time.

[0019] Furthermore, the indicator light is a two-color light (such as green and red), and the following steps are also included:

[0020] a. When personnel are refueling oil on the ground, if the liquid level is lower than the liquid level switch at the low position (point B), the controller will not output a signal and the indicator light will not light up. This means that the oil level is insufficient to support the operation within a refueling cycle and refueling is required;

[0021] b. When the liquid level is below the liquid level switch at the low position B but lower than the liquid level switch at the high position A, the controller indicator light will turn green, indicating that the tank has been filled to the amount required for one refueling cycle. The customer can choose to stop refueling or continue refueling.

[0022] c. When the liquid level is below the high level switch, the controller indicator light will turn red. At this time, filling must be stopped, otherwise there is a risk of oil overflow.

[0023] The present invention also provides an engineering machine equipped with the above-mentioned oil level display device.

[0024] Beneficial effects of the present invention:

[0025] The present invention has a simple structure, is easy to install and disassemble, and has low cost. It can accurately display the liquid level area that customers are concerned about. At the same time, it can effectively save labor costs during maintenance, and maintenance work can be completed by a single person. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, as part of this disclosure, are intended to provide a further understanding of the disclosure. The exemplary embodiments of the disclosure and their descriptions are intended to explain the disclosure and do not constitute undue limitations thereon. Obviously, the drawings described below are merely examples, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0027] In the attached figure:

[0028] Figure 1 Schematic diagram of the overall structure of the oil level display device of the present invention;

[0029] Figure 2 is a schematic diagram of the electrical architecture of the present invention;

[0030] Figure 3 This is a schematic diagram of the oil level display on the display screen of the present invention;

[0031] Figure 4 This is a control logic block diagram of the present invention;

[0032] Figure 5 It is a schematic diagram of the fuel tank structure of the present invention;

[0033] In the figure: 1. Fuel tank, 2. Liquid level switch, 3. Sealing ring, 4. Oil float level gauge, 5. Washer, 6. Bolt, 7. Oil filling pipe, 8. Central filling panel, 9. Oil filling head, 10. Indicator light, 11. Controller, 12. Display screen, 101. Main fuel tank body, 102. Switch fixing base, 103. Sensor fixing base, 104. Breather, 105- Auxiliary fuel tank body.

[0034] 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

[0035] 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.

[0036] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0038] like Figure 1 As shown, an oil level display device includes a fuel tank 1, a liquid level switch 2, a sealing ring 3, an oil float level gauge 4, a gasket 5, a bolt 6, an oil filling pipe 7, a centralized filling panel 8, an oil filling head 9, an indicator light 10, a controller 11 and a display screen 12. The fuel tank 1 and the centralized filling panel 8 are fixed to the engineering machinery vehicle, and the oil filling head 9 and the indicator light 10 are installed on the centralized filling panel 8. The oil filling port of the centralized filling panel 8 is connected to the fuel tank 1 using an oil filling pipe 7, and the centralized filling panel 8 is equipped with an oil filling head 9. The centralized filling panel 8 can be raised and lowered to a suitable position for maintenance personnel to refuel. Through the combined action of the liquid level switch and the oil float level gauge, the present invention can effectively monitor the liquid level height in the fuel tank 1 and display it on the display screen 12 after the controller 11 analyzes the input signal. When the liquid level is insufficient, an alarm can be given in time. When a single maintenance worker is filling the oil, there is no need to keep an eye on the display screen 12 in the cab, and the oil can be filled to the designated height by a single person. At the same time, this method is low in cost, easy to use, and has the advantages of high reliability.

[0039] like Figure 5 As shown, the fuel tank 1 includes two parts: a main fuel tank body 101 and an auxiliary fuel tank body 105, and the main and auxiliary fuel tank bodies are interconnected. A breather 104 is installed on the top of the main fuel tank body 101, and oil is added from the bottom of the auxiliary fuel tank body 105, which is conducive to the rapid discharge of air in the fuel tank 1.

[0040] Three through holes are opened at the high, middle and low positions A, B and E on the side of the main oil tank body 101 respectively. The switch fixing seat 102 is welded outside the concentric parts of the A and B holes, and the sensor fixing seat 103 is welded concentrically outside the E hole.

[0041] The liquid level switch 2 is secured to the switch mounting bracket 102 through the holes at points A and B on the main tank housing 101. The oil float level gauge 4 is mounted to the sensor mounting bracket 103 using bolts 6 and washers 5, located at hole E. To ensure a tight seal, a sealing ring 3 is added between the oil float level gauge 4 and the sensor mounting bracket 103 to prevent oil leakage.

[0042] Further solution: the oil filling head 9 has a one-way valve function to avoid the backflow of oil.

[0043] A further solution is to ensure that the oil level indicated by the hole at point A does not overflow from the breather 104 above the fuel tank 1 when the vehicle is located on the maximum slope allowed for operation.

[0044] Further solution: The oil level indicated at point 1B in the fuel tank can meet the oil usage required for one refueling cycle of the construction machinery.

[0045] like Figure 2 As shown, the two liquid level switches 2 and the oil float level gauge 4 are connected to the controller 11. The liquid level switch 2 outputs a switch signal, and the oil float sensor 4 outputs a voltage signal. After the controller 11 analyzes the input signal, it converts it into an output signal and outputs it to the display screen 12. Different output signals can also control different display states of the indicator light 10.

[0046] Further solutions: Figure 2 As shown, the indicator light 10 is a two-color light such as green and red, and is characterized in that it includes the following steps:

[0047] a. When personnel are filling oil on the ground, if the liquid level is lower than the liquid level switch 2 at the low position, the controller will not output a signal and the indicator light 10 will not light up;

[0048] b. When the liquid level is below the low level switch 2 but lower than the high level switch 2, the controller controls the indicator light 10 to display green. At this time, the oil can meet the oil required for a refueling cycle. You can stop filling or continue filling.

[0049] c. When the liquid level is below the high level switch 2, the controller 11 controls the indicator light 10 to display red. At this time, filling must be stopped, otherwise there is a risk of oil overflow.

[0050] Further solutions, such as Figure 3 As shown, the oil float level gauge 4 outputs different voltages corresponding to different liquid levels in the area from point C to point G within its measuring range. The controller 11 can directly analyze the corresponding liquid levels through the different voltage values ​​output by the oil float level gauge 4.

[0051] Further solutions, such as Figure 3 As shown, when the display screen 12 displays the liquid level, it is divided into several intervals. The area above point A of the high liquid level switch 2 is set as interval one, the area from point A to point B between the high and low liquid level switches 2 is set as interval two, the area from the low liquid level switch 2 to a certain depth from B to D below the highest range of the oil float level gauge 4 is set as interval three, and the area from a certain depth D below the highest range of the oil float level gauge 4 to a certain depth F above the lowest range is divided into several intervals from interval three to interval N. The area below point F above the lowest range of the oil float level gauge 4 is set as an alarm area.

[0052] In a further embodiment, the display screen 12 further includes the following steps when displaying the liquid level:

[0053] a. When the liquid level is higher than the high level switch 2A, the controller 11 receives the signal from the two liquid level switches 2 and the oil float level gauge 4, outputs it to the display 12, and turns on the backlights of interval 1 to interval N on the display 12, indicating that the current oil level is FULL.

[0054] b. When the liquid level drops to the A-B area, the controller receives the signal from the low level switch 2 and the oil float level gauge 4, and the controller outputs it to the display screen, turning off the backlight of interval 1 and lighting up all intervals 2 to N;

[0055] c. When the liquid level is lower than the low level switch 2, the controller only receives the signal of the oil float level gauge 4, and the controller outputs it to the display screen, turning off the backlights of intervals 1 and 2, and lighting up the backlights of intervals 3 to N.

[0056] d. The oil float level gauge 4 can output different voltage signals X1~X2 for different liquid levels within its measuring range C~G. As the liquid level drops, when it reaches point D, the output voltage of the oil float level gauge 4 reaches the set value X3X3∈[X1,X2]. The controller outputs a signal to the display 12, and the backlight of interval 3 on the display 12 goes out, while the backlight of intervals 4~N continues to light.

[0057] e. The liquid level area from point D to point F can be divided into several intervals on the display screen 12. The output voltage of the oil float level gauge 4 is also divided into corresponding intervals. When the liquid level gradually decreases, the backlight of interval four to interval N on the display screen 12 gradually goes out.

[0058] f. When the liquid level is lower than the alarm point F, the oil level will soon be exhausted, the red backlight of the oil level alarm area on the display 12 starts flashing, and an audible alarm is provided, prompting that the machine must be stopped and oil must be added.

[0059] The implementation process of the above-mentioned oil level display device is given below:

[0060] like Figure 4 As shown, after the machine is started, if the liquid level exceeds the level switch 2 at point A, all backlights in the liquid level display area on display 12, except for the warning light at the bottom, illuminate. The FULL indicator in interval 1 indicates that the oil level is full. As the machine begins operation, the oil level begins to drop. When it falls between points A and B, the FULL backlight turns off, and the other backlights illuminate. When the liquid level falls below the level switch 2 at point B, controller 11 outputs to display 12, turning off the backlights in intervals 1 and 2 and illuminating the backlights in intervals 3 through N.

[0061] The oil float level gauge 4 can output different voltage signals for different liquid levels within its measuring range (C~G area). As the liquid level drops, when it drops to point D, the output voltage of the oil float level gauge 4 reaches the set value, and the controller outputs a signal to the display 12. The backlight of interval 3 on the display 12 goes out, and the backlight of intervals 4 to N continue to light up.

[0062] For the liquid level area from point D to point F, the liquid level within this liquid level section (D~F) can be divided into several intervals according to actual needs. The output voltage range corresponding to each interval is different. The display screen 12 is also divided into corresponding intervals 4 to N for display. When the liquid level gradually decreases, the output voltage of the oil float level gauge 4 gradually changes, and the backlight of intervals 4 to N on the display screen 12 gradually goes out.

[0063] When the liquid level is lower than the alarm point F, the oil level will soon be exhausted, the red backlight of the oil level alarm area on the display screen 12 starts flashing, and an audible alarm is provided, prompting that oil must be added at this time.

[0064] To ensure safety, the driver turns off the vehicle and goes to the ground to refill the oil. The oil is injected through the oil filling head 9 on the centralized filling panel 8 and enters the fuel tank 1 through the oil filling pipe 7. At this time, the oil level is low and the indicator light 10 is off. When the liquid level rises to the liquid level switch 2 at point B, the controller 11 receives the switch signal and the control indicator light 10 turns green, which means that the fuel tank has enough oil to meet one refueling cycle. Depending on the actual on-site operation, you can choose to stop refueling or continue refueling. If you choose to continue refueling, when the liquid level switch 2 at point A is turned on and off, the controller 11 receives the switch signal and the control indicator light 10 turns red. This means that the oil level has reached the top and there is a risk of overflow if you refuel further. Maintenance personnel need to stop refueling.

[0065] 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.

[0066] 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.

[0067] 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 above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above-mentioned technical contents 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. An oil level display device, characterized in that: It includes a level switch for fixed-point oil level monitoring, an oil float level gauge for oil level interval measurement, and a centralized filling panel and indicator lights for filling; There are three holes (high, middle and low) on the side of the oil tank. The liquid level switch is inserted and fixed from the high and middle holes of the oil tank, and the oil float level gauge is inserted and fixed from the low hole of the oil tank. The centralized filling panel is equipped with an oil filling head, one end of the oil filling pipe is connected to the oil filling port of the centralized filling panel, and the other end is connected to the oil tank; The indicator light is fixed on the centralized filling panel; The liquid level switch and the oil float level gauge are connected to a controller, which analyzes the input signal and converts it into an output signal, outputs it to the display screen, and controls the indicator light to display it at the same time.

2. The oil level display device according to claim 1, characterized in that: The fuel tank includes a main fuel tank body and an auxiliary fuel tank body, and the main and auxiliary fuel tank bodies are interconnected; A breather is installed at the top of the main oil tank body, and oil is added from the bottom of the auxiliary oil tank body.

3. The oil level display device according to claim 2, characterized in that: Three holes, high, medium and low, are arranged on the main tank body; A switch fixing seat is installed on the high and middle holes, and the liquid level switch is fixed on the switch fixing seat; A sensor fixing seat is installed on the low-position hole, the oil float level gauge is installed on the sensor fixing seat through bolts and washers, and a sealing ring is installed between the oil float level gauge and the sensor fixing seat.

4. The oil level display device according to claim 1, characterized in that: The oil filling head is provided with a one-way valve function to prevent the oil from flowing back.

5. The oil level display device according to claim 1, characterized in that: The oil level indicated by the high-level hole of the fuel tank must ensure that the oil will not overflow from the breather above the fuel tank when the vehicle is located on the maximum slope allowed for operation; The oil level indicated by the center hole of the oil tank can meet the oil usage required for one refueling cycle of the construction machinery.

6. A display method based on the oil level display device according to any one of claims 1 to 5, characterized in that: When displaying the liquid level, the display screen is divided into several intervals. The area exceeding point A of the high liquid level switch is set as interval one, the area between point A of the high liquid level switch and point B of the low liquid level switch is set as interval two, the area from point B of the low liquid level switch to point D at a certain depth below the highest scale point C of the oil float level gauge is set as interval three, the area from point D at a certain depth below the highest scale point C of the oil float level gauge to point F at a certain depth above the lowest scale point G of the oil float level gauge is set as interval four to interval N, and the area below point F at a certain depth above the lowest scale point G of the oil float level gauge is set as the alarm area.

7. A display method according to claim 6, characterized in that: When the display screen displays the liquid level, it also includes the following steps: a. When the liquid level is higher than point A of the high level switch, the controller receives signals from the two level switches and the oil float level gauge, outputs them to the display, and lights up all the backlights in intervals 1 to N on the display, indicating that the current oil level is full; b. When the liquid level drops to the A-B area, the controller receives the signal from the low level switch and the oil float level gauge, and outputs it to the display screen, turning off the backlight of zone 1 and lighting up all zones 2 to N. c. When the liquid level is lower than the low level switch, the controller only receives the signal from the oil float level gauge, and the controller outputs it to the display screen, turning off the backlights of intervals 1 and 2, and lighting up the backlights of intervals 3 to N; d. The oil float level gauge can output different voltage signals X1 to X2 for different liquid levels within its range C to G. As the liquid level drops, when it reaches point D, the output voltage of the oil float level gauge reaches the set value X3 (X3∈[X1,X2]). The controller outputs a signal to the display, and the backlight of interval 3 on the display goes out, while the backlights of intervals 4 to N continue to light up. e. The liquid level area from point D to point F is divided into several intervals on the display screen, and the output voltage of the oil float level gauge is also divided into corresponding intervals. When the liquid level gradually decreases, the backlight of intervals 4 to N on the display screen gradually goes out; f. When the liquid level is lower than the alarm point F, the oil level will soon be exhausted, the red backlight in the oil level alarm area on the display screen starts flashing, and an audible alarm is given, prompting that the machine must be stopped to add oil.

8. A display method according to claim 6, characterized in that: The indicator light is a green and red two-color light, comprising the following steps: a. When personnel are filling oil on the ground, if the liquid level is lower than the low level switch, the controller will not output a signal and the indicator light will not light up; b. When the liquid level exceeds the low level switch but is lower than the high level switch, the controller indicator light will turn green. At this time, the oil can meet the oil requirements for one refueling cycle, and you can stop refueling or continue refueling. c. When the liquid level exceeds the high level switch, the controller control indicator light will turn red. At this time, filling must be stopped, otherwise there is a risk of oil overflow.

9. The display method according to claim 6, wherein: The oil float level gauge outputs different voltages corresponding to different liquid levels within its measuring range, and the controller can directly parse out the corresponding liquid levels through the different voltage values ​​output by the oil float level gauge.

10. An engineering machine, characterized in that: The oil level display device according to any one of claims 1 to 5 is installed.

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