A forklift fuel tank device

Abstract

This utility model relates to the field of forklift technology and discloses a forklift fuel tank device, which includes a fuel tank body having a accommodating cavity for storing fuel; a heating assembly including a first heating element, a second heating element, and a temperature sensor respectively inserted into the accommodating cavity, wherein the first heating element, the second heating element, and the temperature sensor extend along the height direction of the accommodating cavity, wherein the first heating element and the second heating element are used to heat the fuel in the accommodating cavity, and the temperature sensor is used to detect the temperature of the fuel; a control system is electrically connected to the first heating element, the second heating element, and the temperature sensor, and is used to receive the detection signal from the temperature sensor and control the first heating element and the second heating element to turn on or off synchronously or asynchronously according to the detection signal. The advantages of this utility model are high heating efficiency and the ability to dynamically adjust the fuel temperature.

Description

Technical Field

[0001] This utility model relates to the field of forklift technology, and in particular to a forklift fuel tank device. Background Technology

[0002] Forklifts, as core tools in logistics handling equipment, are widely used in various industrial production and warehousing transportation scenarios. During forklift operation, the performance of the hydraulic fluid directly affects the stability and efficiency of its power and hydraulic systems. Especially in low-temperature environments, the viscosity of the hydraulic fluid increases and its fluidity decreases, easily leading to problems such as difficulty in starting the forklift, sluggish movement, and even abnormal system pressure, thus affecting the overall working efficiency and service life of the machine. Currently, some forklift oil tank structures have heating devices to improve the low-temperature performance of the hydraulic fluid. However, existing heating devices typically use a single heating element, resulting in low heating efficiency and a lack of real-time monitoring and feedback control functions for hydraulic fluid temperature, making it difficult to achieve precise temperature regulation. In addition, traditional heating methods often suffer from high heating energy consumption and slow response, failing to meet the needs of dynamic temperature regulation under different operating conditions. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a forklift oil tank device with high heating efficiency and the ability to dynamically adjust the oil temperature.

[0004] The technical solution adopted by this utility model to solve its technical problem is to provide a forklift fuel tank device, comprising:

[0005] The fuel tank body has a accommodating cavity for storing fuel.

[0006] A heating assembly includes a first heating element, a second heating element, and a temperature sensor respectively inserted into the accommodating cavity. The first heating element, the second heating element, and the temperature sensor extend along the height direction of the accommodating cavity. The first heating element and the second heating element are used to heat the oil in the accommodating cavity, and the temperature sensor is used to detect the temperature of the oil.

[0007] The control system is electrically connected to the first heating element, the second heating element, and the temperature sensor, and is used to receive the detection signal from the temperature sensor and control the first heating element and the second heating element to turn on or off synchronously or asynchronously according to the detection signal.

[0008] In the above-mentioned forklift fuel tank device, the top of the fuel tank body is provided with a first mounting hole and a second mounting hole communicating with the accommodating cavity. The first heating element is vertically and detachably inserted into the first mounting hole from top to bottom, and the second heating element is vertically and detachably inserted into the second mounting hole from top to bottom.

[0009] In the forklift fuel tank device described above, the first heating element has a first fixing part and a first heating part. The first fixing part is detachably engaged in the first mounting hole, the first heating part is located in the accommodating cavity, and a first sealing element is provided between the first fixing part and the first mounting hole.

[0010] In the forklift oil tank device described above, the second heating element has a second fixing part and a second heating part. The second fixing part is detachably engaged in the second mounting hole, the second heating part is located in the accommodating cavity, and a second sealing element is provided between the second fixing part and the second mounting hole.

[0011] In the aforementioned forklift fuel tank device, the top of the fuel tank body is further provided with a third mounting hole communicating with the accommodating cavity, and the temperature sensor is vertically and detachably installed in the third mounting hole from top to bottom.

[0012] In the above-mentioned forklift oil tank device, a mounting plate is included. The mounting plate is detachably fixed above the third mounting hole and can close the third mounting hole. The mounting plate is provided with a positioning hole and an oil inlet hole that penetrate through itself. The temperature sensor is sequentially inserted into the positioning hole and the third mounting hole. An oil inlet structure communicating with the accommodating cavity is inserted into the oil inlet hole.

[0013] In the forklift oil tank device described above, a third seal is provided between the mounting plate and the third mounting hole, and the oil inlet structure includes an oil inlet pipe passing through the oil inlet hole and a sealing cap detachably provided at the end of the oil inlet pipe away from the accommodating cavity.

[0014] In the forklift oil tank device described above, the mounting plate is further provided with an oil suction hole and an oil return hole. A first filter structure extending into the accommodating cavity is inserted through the oil suction hole, and a second filter structure extending into the accommodating cavity is inserted through the oil return hole. The diameter of the end of the first filter structure located in the accommodating cavity is larger than the diameter of the oil suction hole, and the diameter of the end of the second filter structure located in the accommodating cavity is larger than the diameter of the oil return hole.

[0015] In the above-mentioned forklift oil tank device, the lower part of the side wall of the oil tank body is provided with an oil drain hole communicating with the accommodating cavity. The oil drain hole penetrates the side wall of the oil tank body in a horizontal direction, and a sealing member is detachably provided on the oil drain hole, and a fourth sealing member is provided between the sealing member and the oil drain hole.

[0016] In the above-mentioned forklift oil tank device, a level gauge structure is detachably provided on one side of the oil tank body. The level gauge structure is connected to the interior of the accommodating cavity and is used to detect the level of oil in the accommodating cavity. A thermometer is integrated on the level gauge structure.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. In this utility model, by setting a first heating element, a second heating element, and a temperature sensor respectively inserted into the oil tank accommodating cavity and extending along its height direction, and electrically connecting the three to the control system, the control system can intelligently adjust the synchronous or asynchronous working state of the two heating elements based on the real-time temperature signal fed back by the temperature sensor. This design not only effectively solves the problems of low heating efficiency and slow response of traditional single heating elements, significantly improving the accuracy and energy efficiency of oil heating, but also forms a redundant structure with mutual backup in heating function, improving the reliability of system operation.

[0019] 2. In this utility model, by setting an integrated mounting plate, the temperature sensor, oil inlet structure, first filter structure and second filter structure are arranged in the same installation area, which not only optimizes the spatial layout of the top of the oil tank, but also improves the integration level of the overall structure and the convenience of assembly.

[0020] 3. In this utility model, a liquid level gauge structure is detachably provided on one side of the oil tank body. This liquid level gauge structure is connected to the interior of the accommodating cavity and integrates a thermometer. This design not only displays the oil level in real time, facilitating timely replenishment or replacement of the oil, but also allows operators to intuitively obtain the current oil temperature information, improving ease of use and human-machine interaction experience. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a forklift fuel tank device according to the present invention.

[0022] Figure 2 This is an exploded view of a forklift fuel tank device according to the present invention.

[0023] Figure 3 This is a cross-sectional view of a forklift fuel tank device according to the present invention.

[0024] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0025] 100. Oil tank body; 110. Receptacle cavity; 120. First mounting hole; 130. Second mounting hole; 140. Third mounting hole; 150. Oil drain hole; 200. First heating element; 210. First fixing part; 220. First heating part; 300. Second heating element; 310. Second fixing part; 320. Second heating part; 400. Temperature sensor; 500. First sealing element; 510. Second sealing element; 520. Third sealing element; 530. Fourth sealing element; 600. Mounting plate; 610. Positioning hole; 620. Oil inlet hole; 630. Oil suction hole; 640. Oil return hole; 700. Oil inlet structure; 701. Oil inlet pipe; 702. Sealing cover; 710. First filter structure; 720. Second filter structure; 800. Sealing element; 900. Liquid level gauge structure; 910. Reinforcing element. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] like Figures 1 to 3 As shown, in this embodiment, a forklift fuel tank device includes:

[0032] The oil tank body 100 has a accommodating cavity 110 for storing oil.

[0033] The heating assembly includes a first heating element 200, a second heating element 300, and a temperature sensor 400 respectively inserted into the accommodating cavity 110. The first heating element 200, the second heating element 300, and the temperature sensor 400 extend along the height direction of the accommodating cavity 110. The first heating element 200 and the second heating element 300 are used to heat the oil in the accommodating cavity 110, and the temperature sensor 400 is used to detect the temperature of the oil.

[0034] The control system, electrically connected to the first heating element 200, the second heating element 300, and the temperature sensor 400, receives the detection signal from the temperature sensor 400 and controls the first heating element 200 and the second heating element 300 to turn on or off synchronously or asynchronously based on the detection signal. This design not only effectively solves the problems of low heating efficiency and slow response of traditional single heating elements, significantly improving the accuracy and energy efficiency of oil heating, but also forms a redundant structure with mutual backup in heating function, improving the reliability of system operation.

[0035] like Figures 1 to 3 As shown, in this embodiment, the forklift oil tank device includes an oil tank body 100, which is a rectangular hollow structure with an internal cavity 110 for storing oil. It has good space utilization and structural strength, and is suitable for the oil supply needs of the forklift hydraulic system or fuel system.

[0036] Furthermore, the fuel tank body 100 is provided with an oil inlet 620 and an oil outlet 150 communicating with the accommodating cavity 110, for adding or draining oil into the fuel tank body 100. The oil inlet 620 can be located at the top or upper side wall of the fuel tank body 100 to facilitate the injection of oil into the accommodating cavity 110; the oil outlet 150 is located at the bottom or lower side wall of the fuel tank body 100 to ensure smooth oil drainage and reduce residue.

[0037] Preferably, both the oil inlet 620 and the oil outlet 150 are circular, facilitating manufacturing and the connection and adaptation of standard pipe fittings. The oil inlet 620 is located on the mounting plate 600 at the top of the oil tank body 100, vertically penetrating the mounting plate 600 and communicating with the accommodating cavity 110. Integration with the mounting plate 600 improves the overall structural compactness and assembly efficiency. The oil outlet 150 is located on the lower part of the side wall of the oil tank body 100, near the bottom, and horizontally penetrates the side wall of the oil tank body 100. This allows for maximum drainage during oil replacement or maintenance, preventing oil residue from affecting system cleanliness.

[0038] Furthermore, an oil inlet structure 700 communicating with the accommodating cavity 110 is provided inside the oil inlet hole 620. The oil inlet structure 700 includes an oil inlet pipe 701 and a detachable sealing cap 702 located at its outer end. The oil inlet pipe 701 passes through the oil inlet hole 620 and extends into the oil tank body 100, communicating with the accommodating cavity 110, for guiding external oil into the oil tank. The sealing cap 702 is detachably located at the end of the oil inlet pipe 701 away from the accommodating cavity 110, for sealing the oil inlet when not refueling, to prevent dust from entering or oil from leaking.

[0039] Preferably, the oil inlet pipe 701 is a hollow cylindrical structure, made of metal or high-strength oil-resistant plastic, with good pressure resistance and sealing performance. One end extends into the accommodating cavity 110, and the other end extends to the outside of the oil tank, and is fixed in the oil inlet hole 620 by a threaded connection, which facilitates installation and disassembly.

[0040] Furthermore, a plug 800 is detachably provided on the oil drain hole 150 to seal the oil drain port under normal operating conditions. It can be removed when the oil needs to be replaced or drained to enable maintenance or cleaning of the oil tank.

[0041] Furthermore, a fourth sealing element 530 is provided between the sealing element 800 and the oil drain hole 150 to ensure the sealing performance of the connection and prevent oil leakage. Preferably, the sealing element 800 and the oil drain hole 150 are fixed by a threaded connection, which can facilitate quick disassembly and assembly.

[0042] Furthermore, a sealing element 800 is detachably provided on the oil drain hole 150, and a fourth sealing element 530 is provided between the sealing element 800 and the oil drain hole 150. Preferably, the fourth sealing element 530 is an annular gasket, usually made of materials with good elasticity and oil resistance such as rubber or fluororubber, and is provided between the sealing element 800 and the oil drain hole 150 to form an effective static sealing structure, thereby further improving the sealing reliability and safety of the oil tank device.

[0043] To prevent the forklift from experiencing sluggish or even non-functional hydraulic operations such as steering and lifting due to increased oil viscosity in low-temperature operating environments, this embodiment also includes a heating component in the forklift's oil tank. This heating component comprises a first heating element 200, a second heating element 300, and a temperature sensor 400, all electrically connected to the control system. The first heating element 200 and the second heating element 300 heat the oil within the oil tank's accommodating cavity 110, while the temperature sensor 400 monitors the current oil temperature in real time.

[0044] Furthermore, the first heating element 200 and the second heating element 300 are respectively vertically inserted into the receiving cavity 110 of the oil tank body 100 and extend along the height direction of the receiving cavity 110 to ensure sufficient and uniform heating of the oil. Preferably, the first heating element 200 and the second heating element 300 are arranged side by side to form a symmetrical or nearly symmetrical heating distribution structure, thereby further improving heating efficiency and temperature field uniformity.

[0045] Furthermore, the temperature sensor 400 is also vertically inserted into the accommodating cavity 110, enabling it to accurately collect the actual temperature data of the oil and feed this temperature signal back to the control system in real time. Based on the feedback signal from the temperature sensor 400, and combined with preset control logic (such as setting a temperature threshold), the control system intelligently controls the start / stop status of the first heating element 200 and the second heating element 300, achieving closed-loop regulation of the oil temperature. For example, when the oil temperature is detected to be below the set lower limit, the control system activates one or both heating elements for heating; when the oil temperature reaches the set upper limit, it controls the heating elements to stop working, thus achieving a control effect that balances energy-saving operation and temperature stability.

[0046] In this embodiment, the top of the fuel tank body 100 is provided with a first mounting hole 120 and a second mounting hole 130 communicating with the accommodating cavity 110. The first heating element 200 is vertically and detachably inserted into the first mounting hole 120 from top to bottom, and the second heating element 300 is similarly vertically and detachably inserted into the second mounting hole 130 from top to bottom. This design ensures the convenience of installation and maintenance of the first heating element 200 and the second heating element 300, facilitating on-site replacement or repair.

[0047] Furthermore, the first heating element 200 includes a first fixing part 210 and a first heating part 220 connected vertically in sequence. The first fixing part 210 is detachably engaged in the first mounting hole 120 to achieve a stable connection between the heating element and the oil tank body 100. The first heating part 220 is located inside the accommodating cavity 110 and is used to heat the oil. Similarly, the second heating element 300 includes a second fixing part 310 and a second heating part 320 connected in sequence. The second fixing part 310 is detachably engaged in the second mounting hole 130, and the second heating part 320 extends into the accommodating cavity 110 and participates in the oil heating process.

[0048] Preferably, the first heating element 200 and the second heating element 300 are tubular electric heaters, which have good heating efficiency and pressure resistance. They are externally coated with an anti-corrosion coating or encapsulated in stainless steel to enhance their corrosion resistance and service life in various oil environments, making them suitable for heating various types of oils such as hydraulic oil and lubricating oil.

[0049] Preferably, both the first mounting hole 120 and the second mounting hole 130 are circular, which facilitates manufacturing and the installation of standard components. The first fixing part 210 and the first mounting hole 120 are connected by a threaded connection to achieve detachable fixing, and the second fixing part 310 and the second mounting hole 130 are connected in the same way, which ensures the firmness of the connection and improves the convenience of assembly and disassembly.

[0050] More preferably, to improve sealing performance and prevent oil leakage, a first sealing element 500 is provided between the first fixing part 210 and the first mounting hole 120, and a second sealing element 510 is provided between the second fixing part 310 and the second mounting hole 130. This design can form an effective static seal after the heating element is installed, ensuring operational safety.

[0051] In this embodiment, the top of the fuel tank body 100 is also provided with a third mounting hole 140 communicating with the accommodating cavity 110. The temperature sensor 400 is vertically and detachably inserted into the third mounting hole 140 from top to bottom to facilitate installation, replacement, or periodic calibration. This design not only improves the maintainability of the temperature detection component but also ensures its stable positioning inside the fuel tank.

[0052] Furthermore, the temperature sensor 400 passes through the positioning hole 610 on the mounting plate 600 in sequence and is inserted into the third mounting hole 140 of the oil tank body 100, and finally extends into the accommodating cavity 110 to realize real-time detection of oil temperature.

[0053] To further achieve structural integration and modular functional layout, this embodiment also includes a detachable mounting plate 600. The mounting plate 600 is detachably fixed above the third mounting hole 140 and can seal the third mounting hole 140 to provide dustproof, leakproof and structural reinforcement.

[0054] Furthermore, the third mounting hole 140 is rectangular in shape and extends vertically through the top of the tank body 100 to accommodate the installation of the temperature sensor 400 and related functional components. Correspondingly, the mounting plate 600 is also rectangular, with an area larger than the opening area of ​​the third mounting hole 140, so as to cover and close the mounting area.

[0055] Preferably, to enhance the structural strength and sealing performance of the installation area, a reinforcing member 910 is provided between the mounting plate 600 and the third mounting hole 140. The reinforcing member 910 is a hollow rectangular structure that extends vertically, with its upper opening size larger than that of the third mounting hole 140, and is aligned with the third mounting hole 140 to ensure the stability and consistency of the installation structure.

[0056] Furthermore, the bottom of the reinforcing member 910 is welded and fixed to the upper surface of the fuel tank body 100, while the top is detachably connected to the mounting plate 600 by fasteners (such as bolts or screws), which facilitates later maintenance and replacement.

[0057] Preferably, a reinforcing member 910 is provided between the mounting plate 600 and the third mounting hole 140. The reinforcing member 910 is a hollow rectangular structure that extends vertically. Its size is larger than that of the third mounting hole 140 and it is aligned with the third mounting hole 140. One side of the reinforcing member 910 is welded to the upper surface of the oil tank body 100, and the other side is detachably connected to the mounting plate 600 by fasteners. This design ensures that the connection points of components such as the temperature sensor 400, oil inlet structure 700, first filter structure 710, and second filter structure 720, which are mounted on the mounting plate 600, are all located above the highest oil level inside the accommodating cavity 110. This effectively prevents the oil from contacting these connection points during normal operation, preventing oil leakage due to seal failure and improving the overall safety and reliability of the device.

[0058] More preferably, a third sealing element 520 is provided between the mounting plate 600 and the reinforcing member 910. The third sealing element 520 has a hollow rectangular structure, which can form a good static seal under the condition of fastener compression, further ensuring the sealing reliability and safety of the system.

[0059] Furthermore, the mounting plate 600 is provided with a through-hole 610 and an oil inlet 620. Both the positioning hole 610 and the oil inlet 620 are circular. The positioning hole 610 is used to position and guide the temperature sensor 400 to ensure that its installation position is accurate and stable. The oil inlet 620 is used to pass through the relevant components of the oil inlet structure 700 to facilitate the injection of oil into the oil tank cavity 110.

[0060] Furthermore, the mounting plate 600 is also provided with an oil suction hole 630 and an oil return hole 640, which are used for the suction and return of oil in the hydraulic system, respectively. The oil suction hole 630 is equipped with a first filter structure 710 extending into the receiving cavity 110, which performs preliminary filtration of the oil before it enters the hydraulic pump, preventing impurities from entering the hydraulic system and thus improving the stability and reliability of the system operation. The oil return hole 640 is equipped with a second filter structure 720 extending into the receiving cavity 110, which intercepts impurities in the returned oil, preventing contamination of critical system components.

[0061] To prevent the first filter structure 710 and the second filter structure 720 from detaching during use, the diameter of the end of the first filter structure 710 located within the receiving cavity 110 is larger than the diameter of the oil suction hole 630, and the diameter of the end of the second filter structure 720 located within the receiving cavity 110 is larger than the diameter of the oil return hole 640. This design effectively prevents the first filter structure 710 and the second filter structure 720 from detaching from the oil suction hole 630 or the oil return hole 640.

[0062] Furthermore, the first filter structure 710 includes a first connecting pipe and a first filter. The first filter is disposed inside the accommodating cavity 110, near the bottom area, for intercepting metal debris or particulate impurities in the oil. One end of the first connecting pipe is located outside the oil tank body 100 for connecting to hydraulic power components such as gear pumps, and the other end passes through the oil suction hole 630 and is connected to the first filter for delivering the pre-filtered oil to the hydraulic system.

[0063] Furthermore, the second filter structure 720 includes a second connecting pipe and a second filter. The second filter is located inside the accommodating cavity 110 and is positioned higher than the first filter. It is used to intercept fine impurities carried in the oil returning from the system. One end of the second connecting pipe is located outside the oil tank body 100 and is used to connect to the return oil interface of the valve group. The other end passes through the return oil hole 640 and is connected to the second filter, so that the return oil is filtered before entering the accommodating cavity 110, thereby ensuring the cleanliness of the oil.

[0064] In this embodiment, a level gauge structure 900 is detachably provided on one side of the oil tank body 100. This level gauge structure 900 communicates with the interior of the accommodating cavity 110 and is used to detect the level of oil in the accommodating cavity 110 in real time. This design allows the operator to intuitively judge the remaining amount of oil in the tank, facilitating timely replenishment or replacement of the oil.

[0065] Preferably, a thermometer is integrated on the level gauge structure 900 to simultaneously display the current temperature of the oil. This design can simultaneously acquire oil level and temperature information, effectively improving the visualization and management level of the forklift's oil tank device and enhancing the convenience and practicality of human-machine interaction.

Claims

1. A forklift fuel tank device, characterized in that, include: The fuel tank body has a accommodating cavity for storing fuel. A heating assembly includes a first heating element, a second heating element, and a temperature sensor respectively inserted into the accommodating cavity. The first heating element, the second heating element, and the temperature sensor extend along the height direction of the accommodating cavity. The first heating element and the second heating element are used to heat the oil in the accommodating cavity, and the temperature sensor is used to detect the temperature of the oil. The control system is electrically connected to the first heating element, the second heating element, and the temperature sensor, and is used to receive the detection signal from the temperature sensor and control the first heating element and the second heating element to turn on or off synchronously or asynchronously according to the detection signal.

2. The forklift fuel tank device according to claim 1, characterized in that, The top of the oil tank body is provided with a first mounting hole and a second mounting hole that communicate with the accommodating cavity. The first heating element is vertically and detachably inserted into the first mounting hole from top to bottom, and the second heating element is vertically and detachably inserted into the second mounting hole from top to bottom.

3. A forklift fuel tank device according to claim 2, characterized in that, The first heating element has a first fixing part and a first heating part. The first fixing part is detachably engaged in the first mounting hole, the first heating part is located in the accommodating cavity, and a first sealing element is provided between the first fixing part and the first mounting hole.

4. A forklift fuel tank device according to claim 2, characterized in that, The second heating element has a second fixing part and a second heating part. The second fixing part is detachably engaged in the second mounting hole, the second heating part is located in the accommodating cavity, and a second sealing element is provided between the second fixing part and the second mounting hole.

5. A forklift fuel tank device according to claim 1, characterized in that, The top of the oil tank body is also provided with a third mounting hole that communicates with the accommodating cavity, and the temperature sensor is vertically and detachably installed in the third mounting hole from top to bottom.

6. A forklift fuel tank device according to claim 5, characterized in that, The device includes a mounting plate, which is detachably fixed above the third mounting hole and can close the third mounting hole. The mounting plate is provided with a positioning hole and an oil inlet hole that penetrate through it. The temperature sensor is sequentially inserted into the positioning hole and the third mounting hole. An oil inlet structure communicating with the accommodating cavity is inserted into the oil inlet hole.

7. A forklift fuel tank device according to claim 6, characterized in that, A third sealing element is provided between the mounting plate and the third mounting hole, and the oil inlet structure includes an oil inlet pipe passing through the oil inlet hole and a sealing cap detachably provided at the end of the oil inlet pipe away from the accommodating cavity.

8. A forklift fuel tank device according to claim 6, characterized in that, The mounting plate is also provided with an oil suction hole and an oil return hole. A first filter structure extending into the accommodating cavity is inserted into the oil suction hole, and a second filter structure extending into the accommodating cavity is inserted into the oil return hole. The diameter of the end of the first filter structure located in the accommodating cavity is larger than the diameter of the oil suction hole, and the diameter of the end of the second filter structure located in the accommodating cavity is larger than the diameter of the oil return hole.

9. A forklift fuel tank device according to claim 1, characterized in that, The lower part of the side wall of the oil tank body is provided with an oil drain hole that communicates with the accommodating cavity. The oil drain hole penetrates the side wall of the oil tank body in a horizontal direction, and a sealing member is detachably provided on the oil drain hole. A fourth sealing member is provided between the sealing member and the oil drain hole.

10. A forklift fuel tank device according to claim 1, characterized in that, A level gauge structure is detachably provided on one side of the oil tank body. The level gauge structure is connected to the interior of the accommodating cavity and is used to detect the level of oil in the accommodating cavity. A thermometer is integrated on the level gauge structure.

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