Fuel tank assembly of working machine

Abstract

The utility model discloses a fuel tank assembly of an operating machine, which comprises a fuel tank and a covering part, a fuel filling port is arranged on the fuel tank, a via hole for the fuel filling port to pass through is arranged on the covering part, a sealing part is arranged between the fuel filling port and the via hole, and the fuel filling port and the via hole are communicated through the sealing part. The sealing piece comprises a first sealing part, a second sealing part and a flow guide part, the first sealing part, the second sealing part and the flow guide part are integrally formed, the flow guide part is obliquely arranged, the first sealing part is located at the top of the flow guide part and is in sealing fit with the outer wall of the fuel filling port, and the second sealing part is located on the lower side of the flow guide part; and a clamping cavity for accommodating the edge of the via hole of the covering part is formed between the second sealing part and the flow guide part. According to the scheme, the problem that in the prior art, fuel leakage is prone to occurring at a fuel filling opening of a fuel tank is solved.

Description

Technical Field

[0001] The utility model relates to a fuel tank assembly of an operating machine. Background Art

[0002] Existing working machines are usually powered by gasoline engines or diesel engines, and are generally provided with fuel tanks for storing fuel. A fuel filling port is usually provided on the fuel tank. In order to ensure the quietness and aesthetics of the working machine, a cover is usually provided on the outside of the fuel tank, so the fuel tank assembly of the working machine is mainly composed of the fuel tank and the cover. The cover is provided with a through hole for the fuel filling port of the fuel tank to pass through. In order to prevent the fuel splashed at the fuel filling port from entering the interior of the working machine through the through hole of the cover and causing a safety accident, a sealing treatment is performed between the fuel filling port and the through hole.

[0003] Chinese patent document CN209369966U discloses a sealing device for a generator set, characterized in that it includes a frame assembly, an oil tank is arranged on the upper part of the frame assembly, and an oil filling port is arranged on the oil tank; a cover is arranged above the oil tank, and a sealing gasket is arranged on the cover; wherein a first through hole is arranged on the cover, and a second through hole is arranged on the sealing gasket, and the first through hole and the second through hole are both matched with the oil filling port. In a specific implementation, the sealing gasket can be arranged around the oil filling port, and its end is located at the edge of the cover, so as to guide the leaked fuel to the edge of the cover through the sealing gasket, further preventing the leaked fuel from entering the interior of the generator set, and improving safety, and a countersunk hole can be arranged around the first through hole of the cover, and the depth of the countersunk hole matches the thickness of the sealing gasket, so as to improve the aesthetics of the overall sealing device and facilitate the installation of the sealing gasket. Furthermore, in order to improve the installation efficiency of the gasket on the cover, a positioning part is provided at the bottom of the gasket in the present solution, specifically, a positioning shaft is provided on the gasket, and a positioning hole matching the positioning shaft is provided on the cover. During the installation process, it is only necessary to match the positioning shaft with the positioning hole to perform the installation. During specific use, multiple positioning shafts can be provided on the gasket, evenly arranged along the circumference of the gasket, so as to improve the installation efficiency and accurate positioning. This prior art solution achieves a sealing effect by providing a cover and a gasket, and utilizing the mutual matching of the outer diameter of the oil filling port and the inner diameter of the second through hole of the gasket. If leakage occurs during the process of adding fuel, the leaked fuel will also seriously flow out of the gasket, solving the problem that the leaked fuel flows into the interior of the generator set and is prone to safety accidents, improving the sealing of the fuel filling port and the interior of the generator set, and reducing safety risks. At the same time, the fuel tank can be added through the oil filling port during the operation of the unit, thereby improving the operating efficiency of the generator set.

[0004] Although the above-mentioned prior art solutions have solved the sealing problem of the fuel filling port in the fuel tank assembly to a certain extent, due to the positioning tolerance during the assembly of the fuel tank and the fixed assembly method of the seal, poor sealing may still occur between the seal and the fuel filling port, resulting in fuel leakage into the interior of the operating machine during fuel filling, causing a safety accident. Utility Model Content

[0005] The utility model aims to provide a fuel tank assembly for a working machine, so as to solve the problem that fuel leakage is easy to occur at the fuel filling port of the fuel tank in the prior art.

[0006] In order to achieve the above-mentioned purpose, the basic scheme of the utility model provides a fuel tank assembly of a working machinery, including a fuel tank and a covering member, the fuel tank is provided with a fuel filling port, the covering member is provided with a through hole for the fuel filling port to pass through, a sealing member is provided between the fuel filling port and the through hole, the sealing member includes a first sealing portion, a second sealing portion and a guide portion, the first sealing portion, the second sealing portion and the guide portion are integrally formed, the guide portion is inclined, the first sealing portion is located at the top of the guide portion and is sealed with the outer wall of the fuel filling port, the second sealing portion is located on the lower side of the guide portion, and a clamping cavity for accommodating the edge of the through hole of the covering member is formed between the second sealing portion and the guide portion.

[0007] Preferably, there is a floating space between the edge of the through hole and the inner wall of the clamping cavity.

[0008] Preferably, an overflow groove portion is provided on the cover along the periphery of the through hole, and the lower end of the guide portion extends into the overflow groove portion.

[0009] Preferably, the lower end of the guide portion is sealingly matched with the cover.

[0010] Preferably, one end of the second sealing portion away from the fuel filling port is sealingly matched with the cover.

[0011] Preferably, a sealing rib engaging with the fuel tank is provided on a side of the second sealing portion facing the fuel tank.

[0012] Preferably, the first sealing portion is interference fit with an outer wall of the fuel filling port.

[0013] The utility model has the following beneficial effects:

[0014] 1. Through the arrangement of the first sealing part and the guide part, the sealing member forms a sealed and loose structure between the fuel filling port and the through hole. The sealing member cooperates with the covering member through the clamping cavity, so that the assembly of the sealing member can be adjusted as needed to ensure the sealing effect, thereby greatly improving the anti-seepage effect around the fuel filling port.

[0015] 2. The setting of the floating space provides a larger adjustment space for the fuel tank, seal and cover during assembly, so that the seal can adapt to the adjustment requirements of a larger range of assembly tolerances, thereby greatly improving the anti-seepage reliability around the fuel filling port.

[0016] 3. The overflow groove can guide the fuel spilled around the fuel filling port in time and away from the fuel filling port, thereby further reducing the fuel leakage around the fuel filling port.

[0017] 4. The lower end of the guide part is sealed with the cover, so that a sealing area is formed between the guide part and the cover, which is beneficial to further improve the anti-seepage effect around the fuel filling port.

[0018] 5. The end of the second sealing part away from the fuel filling port is sealed with the cover, so that the bottom of the cover is supported and sealed, which is beneficial to improve the reliability of the seal.

[0019] 6. The provision of the sealing ribs is conducive to enhancing the sealing effect between the second sealing part and the fuel tank, thereby enhancing the sealing reliability around the fuel filling port. The first sealing part is interference-fitted with the outer wall of the fuel filling port, so that the sealing part can still ensure the sealing performance when performing floating adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of an embodiment of a fuel tank assembly of a working machine of the utility model;

[0021] Figure 2 for Figure 1 Middle AA section view;

[0022] Figure 3 for Figure 2 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0023] The following is further described in detail through specific implementation methods:

[0024] The reference numerals in the drawings of the specification include: a cover 1 , an overflow groove portion 11 , a seal 2 , a first seal portion 21 , a guide portion 22 , a second seal portion 23 , a sealing rib 24 , a fuel tank 3 , a fuel filling port 4 , and a floating space 5 .

[0025] The embodiment is basically as shown in the attached Figures 1 to 3As shown: A fuel tank assembly of an operating machine includes a fuel tank 3 and a cover 1. A fuel filling port 4 is provided on the fuel tank 3. A through hole for the fuel filling port 4 to pass through is provided on the cover 1. A seal 2 is provided between the fuel filling port 4 and the through hole. The seal 2 includes a first seal portion 21, a second seal portion 23 and a flow guide portion 22. The first seal portion 21, the second seal portion 23 and the flow guide portion 22 are integrally formed. The flow guide portion 22 is arranged at an angle. The first seal portion 21 is located at the top of the flow guide portion 22 and is sealed with the outer wall of the fuel filling port 4. In this embodiment, the first seal portion 21 and the outer wall of the fuel filling port 4 are preferably interference fit, so that the sealing performance can still be guaranteed when the seal 2 is floatingly adjusted. In this embodiment, the seal 2 is preferably a flexible seal made of a flexible material.

[0026] The second sealing portion 23 is located at the lower side of the guide portion 22, and a clamping cavity for accommodating the edge of the through hole of the cover 1 is formed between the second sealing portion 23 and the guide portion 22, and a floating space 5 is provided between the edge of the through hole and the inner wall of the clamping cavity. An overflow groove portion 11 is provided on the cover 1 along the periphery of the through hole. In this embodiment, the overflow groove portion 11 is preferably formed by an end of the edge of the through hole close to the fuel filling port 4 protruding upward. In this embodiment, the lower end of the guide portion 22 extends into the overflow groove portion 11, so as to facilitate the rapid introduction of the fuel splashed at the fuel filling port 4 into the overflow groove. Preferably, the lower end of the guide portion 22 is sealed with the cover 1, so that a sealing structure is also formed between the lower end of the guide portion 22 and the cover 1 to block the fuel from flowing toward the clamping cavity. The second sealing portion 23 is sealed with the cover 1. In this embodiment, the end of the second sealing portion 23 away from the fuel filling port 4 is sealed with the cover 1. In this embodiment, the position where the second sealing portion 23 seals with the cover 1 is located at the bottom of the overflow groove 11. The second sealing portion 23 is provided with a sealing rib 24 that engages with the fuel tank 3 on one side thereof facing the fuel tank 3. In this embodiment, the sealing rib 24 is provided with three layers.

[0027] By adopting this solution, the seal 2 forms a sealed-and-loose structure between the fuel filler port 4 and the through-hole through the first sealing portion 21 and the guide portion 22, thereby greatly improving the anti-seepage effect around the fuel filler port 4. At the same time, the setting of the floating space 5 allows the fuel tank 3, the seal 2 and the cover 1 to be adjusted accordingly according to a larger range of assembly tolerances during assembly, thereby greatly reducing the occurrence of poor sealing, and further greatly improving the anti-seepage reliability around the fuel filler port 4.

[0028] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A fuel tank assembly for a working machine, comprising a fuel tank and a cover, wherein the fuel tank is provided with a fuel filling port, the cover is provided with a through hole for the fuel filling port to pass through, and a sealing member is provided between the fuel filling port and the through hole, characterized in that: The sealing member includes a first sealing portion, a second sealing portion and a guide portion, wherein the first sealing portion, the second sealing portion and the guide portion are integrally formed, and the guide portion is inclined. The first sealing portion is located at the top of the guide portion and is sealed with the outer wall of the fuel filling port, and the second sealing portion is located at the lower side of the guide portion, and a clamping cavity for accommodating the edge of the through hole of the cover is formed between the second sealing portion and the guide portion.

2. A fuel tank assembly for a working machine according to claim 1, characterized in that: There is a floating space between the edge of the through hole and the inner wall of the clamping cavity.

3. A fuel tank assembly for a working machine according to claim 1 or 2, characterized in that: An overflow groove is arranged on the cover along the periphery of the through hole, and the lower end of the guide portion extends into the overflow groove.

4. The fuel tank assembly of a working machine according to claim 3, characterized in that: The lower end of the guide portion is sealed with the cover.

5. A fuel tank assembly for a working machine according to claim 1 or 2, characterized in that: One end of the second sealing portion away from the fuel filling port is sealingly matched with the cover.

6. A fuel tank assembly for a working machine according to claim 5, characterized in that: A sealing rib engaged with the fuel tank is provided on a side of the second sealing portion facing the fuel tank.

7. A fuel tank assembly for a working machine according to claim 6, characterized in that: The first sealing portion is interference-fitted with an outer wall of the fuel filling port.

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