Fuel tank cover plate bag type installation sealing structure

Abstract

The utility model discloses an oil tank cover plate bag type installation sealing structure which comprises a hydraulic oil tank and an oil tank cover plate assembly arranged on the hydraulic oil tank, and a sealing assembly for reducing oil leakage is arranged at the joint of the hydraulic oil tank and the oil tank cover plate assembly. The sealing assembly comprises an installation sleeve piece arranged below the fuel tank cover plate assembly and a sealing piece arranged on the surface of the installation sleeve piece, the sealing piece comprises an air bag, an air nozzle steel pipe and an air nozzle cap, the air nozzle steel pipe communicated with the interior of the air bag is installed on the surface of the air bag, and the air nozzle cap is installed at the end, away from the air bag, of the air nozzle steel pipe. The hydraulic oil tank is simple in structure, the hydraulic oil tank has good sealing performance and air permeability, the oil leakage phenomenon of the oil tank cover plate is reduced, the product quality is improved, the oil tank cover plate can be rapidly installed, sealed and disassembled by inflating and deflating nitrogen into the air bag, and the efficiency of the maintenance process of parts of the hydraulic oil tank is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil tanks, in particular to a bag-type installation sealing structure for an oil tank cover. Background Art

[0002] Hydraulic oil tanks play a vital role in the forklift industry. As a key part of the forklift power system and hydraulic system, the main function of the hydraulic oil tank is to store hydraulic oil and ensure that these liquids always maintain a certain pressure and flow during use. This is crucial for the stability and work efficiency of the forklift when driving and performing various actions. It requires a certain structural strength. At the same time, as a liquid container, it is required to have both sealing and air permeability.

[0003] At present, forklift hydraulic oil tanks come in various forms. Commonly, the hydraulic oil tank and the vehicle body are integrated designs, the oil tank cover is installed on the vehicle body through bolt fasteners, and a sealing gasket is set between the oil tank cover and the vehicle body to ensure sealing. However, on the one hand, the vehicle body and the oil tank cover are easily deformed, resulting in uneven joint surfaces. On the other hand, due to the presence of multiple sets of through holes for installation, the sealing gasket is easily deformed or even broken, all of which are likely to cause poor sealing and oil leakage, affecting the product experience; secondly, since the hydraulic oil tank needs to replace filter elements and other parts, the oil tank cover needs to be removed regularly, and usually the oil tank cover is integrated with multiple elbow oil suction steel pipes and elbow oil return steel pipes, and these oil suction steel pipes and oil return steel pipes often increase the difficulty of installing and removing the oil tank cover bolts, thereby affecting the efficiency of the hydraulic oil tank maintenance process. For this reason, a tank cover bladder installation sealing structure is proposed. Utility Model Content

[0004] The utility model aims to provide a bag-type installation sealing structure for a fuel tank cover plate to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tank cover bag-type installation sealing structure, comprising a hydraulic oil tank and a tank cover assembly arranged on the hydraulic oil tank, a sealing assembly for reducing oil leakage is provided at the connection between the hydraulic oil tank and the tank cover assembly, the sealing assembly comprises an installation kit arranged below the tank cover assembly and a sealing member arranged on the surface thereof, the sealing member comprises an air bag, an air nozzle steel pipe and an air nozzle cap, the surface of the air bag is installed with an air nozzle steel pipe connected to its interior, and the end of the air nozzle steel pipe away from the air bag is installed with an air nozzle cap.

[0006] As a further solution of the utility model: the hydraulic oil tank is a container composed of an outer wall plate, an oil drain plug and an inner wall plate, with a rectangular opening at the upper end, and the outer wall plate is designed as an integral whole with the forklift frame.

[0007] As a further solution of the utility model: the fuel tank cover assembly includes a fuel tank cover and a first oil suction steel pipe, a second oil suction steel pipe, an oil return steel pipe and a refueling steel pipe installed on the upper end surface of the fuel tank cover, the lower ends of the first oil suction steel pipe and the second oil suction steel pipe are both provided with oil filters, the end of the refueling steel pipe away from the fuel tank cover is provided with a refueling cap, and the lower end of the refueling cap is provided with an oil dipstick.

[0008] As a further solution of the utility model: the installation kit includes a first mounting plate fixed to the lower end surface of the fuel tank cover, and a second mounting plate and a third mounting plate are arranged below the first mounting plate in sequence. The first mounting plate, the second mounting plate and the third mounting plate are assembled together by multiple mounting bolts.

[0009] As a further solution of the utility model: a fixing plate is provided on the inner wall of the outer wall panel, and the fixing plate is located at the rectangular opening of the outer wall panel, the fixing plate has an L-shaped cross-section, and an upper rectangular opening and a lower rectangular opening are provided on the fixing plate, and the lower rectangular opening is consistent in size with the rectangular opening of the outer wall panel.

[0010] As a further solution of the utility model: the outer wall plate, the fixing plate, the first mounting plate, the second mounting plate and the third mounting plate form an annular space.

[0011] As a further solution of the utility model: the outer surface of the gas nozzle steel pipe is provided with a sealing ring connected to the fuel tank cover plate, and the outer surface of the gas nozzle steel pipe is located at the upper end and the lower end of the fuel tank cover plate. Fixing nuts are installed.

[0012] As a further solution of the utility model: the thickness of the airbag is 2 mm smaller than the thickness of the second mounting plate.

[0013] As a further solution of the utility model: the air valve cap has a built-in air pressure sensor for transmitting air pressure data to the vehicle instrument.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. By filling and releasing nitrogen into the airbag, the oil tank cover can be quickly installed, sealed and disassembled, thereby improving the efficiency of the maintenance process of the hydraulic oil tank parts; secondly, the airbag is fixedly connected to the oil tank cover by nuts, sealing rings, the first mounting plate, the second mounting plate, the third mounting plate and mounting bolts, making the maintenance and replacement of the airbag more convenient.

[0016] 2. The hydraulic oil tank has good sealing and air permeability, which reduces oil leakage from the tank cover and improves product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an axonometric diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the explosion of the hydraulic oil tank of the utility model;

[0019] Figure 3 It is a schematic diagram of the fuel tank cover assembly of the utility model;

[0020] Figure 4 This is an exploded schematic diagram of the sealing assembly of the utility model;

[0021] Figure 5 It is a schematic diagram of the sealing element of the utility model;

[0022] Figure 6 This is a schematic diagram of the airbag of the utility model in a normal state;

[0023] Figure 7 It is a schematic diagram of the airbag expansion state of the utility model;

[0024] In the figure: 1. hydraulic oil tank; 11. outer wall plate; 12. drain plug; 13. inner wall plate; 14. fixing plate; 2. oil tank cover assembly; 21. oil filter; 22. first oil suction steel pipe; 23. second oil suction steel pipe; 24. return oil steel pipe; 25. oil dipstick; 26. refueling cap; 27. refueling steel pipe; 28. oil tank cover; 3. sealing assembly; 30. first mounting plate; 31. second mounting plate; 32. sealing element; 321. airbag; 322. air nozzle steel pipe; 323. fixing nut; 324. sealing ring; 325. air nozzle cap; 33. third mounting plate; 34. mounting bolts. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-7 In an embodiment of the utility model, a tank cover bladder-type installation sealing structure includes a hydraulic oil tank 1 and a tank cover assembly 2 arranged on the hydraulic oil tank 1, a sealing assembly 3 for reducing oil leakage is provided at the connection between the hydraulic oil tank 1 and the tank cover assembly 2, the sealing assembly 3 includes an installation kit arranged below the tank cover assembly 2 and a sealing member 32 arranged on the surface thereof, the sealing member 32 includes an air bag 321, an air nozzle steel pipe 322 and an air nozzle cap 325, the surface of the air bag 321 is installed with an air nozzle steel pipe 322 connected to the interior thereof, and the end of the air nozzle steel pipe 322 away from the air bag 321 is installed with an air nozzle cap 325.

[0027] Specifically, the oil tank cover assembly 2 is detachably installed on the upper surface of the hydraulic oil tank 1, which is convenient for subsequent maintenance of the hydraulic oil tank 1, and by arranging the sealing assembly 3 on the lower surface of the oil tank cover assembly 2, the connection between the oil tank cover assembly 2 and the hydraulic oil tank 1 is tighter, further ensuring that there will be no oil leakage between the oil tank cover assembly 2 and the hydraulic oil tank 1, and the oil tank cover assembly 2 can be disassembled and assembled through the air bag 321, and the air nozzle steel pipe 322 is used to supply air to the inside of the air bag 321. When the air bag 321 is inflated, the position of the oil tank cover assembly 2 can be fixed on the hydraulic oil tank 1. When the air bag 321 is deflated, the oil tank cover assembly 2 can be removed from the hydraulic oil tank 1, and the oil tank cover assembly 2 can be quickly installed and removed by inflating and deflating the air bag 321.

[0028] See also Figure 2 In one embodiment, in this embodiment, preferably, the hydraulic oil tank 1 is a container composed of an outer wall plate 11, an oil drain plug 12 and an inner wall plate 13, with a rectangular opening at the upper end, and the outer wall plate 11 is designed as an integral part with the forklift frame.

[0029] Specifically, the shell of the hydraulic oil tank 1 is formed by combining the outer wall plate 11 and the inner wall plate 13. Secondly, an oil drain port adapted to the oil drain plug 12 is provided on the lower surface of the outer wall plate 11. The bottom of the shell is sealed by inserting the oil drain plug 12 into the oil drain port. The hydraulic oil in the shell can be drained by pulling the oil drain plug 12 out of the oil drain port. Secondly, the outer wall plate 11 and the forklift frame are designed as an integrated whole to fix the hydraulic oil tank 1 on the forklift frame.

[0030] See also Figure 3 In one embodiment, in this embodiment, preferably, the fuel tank cover assembly 2 includes a fuel tank cover 28 and a first oil suction steel pipe 22, a second oil suction steel pipe 23, an oil return steel pipe 24 and a refueling steel pipe 27 installed on the upper end surface of the fuel tank cover 28, the upper end surface of the refueling steel pipe 27 is 260~320mm higher than the upper surface of the outer wall plate 11, and 2~3 layers of air filters with a filtration accuracy of 625~800 mesh are arranged inside the refueling steel pipe 27 at a distance of 40~80mm from the upper end surface. The oil dipstick 25 penetrates the air filter, and a breathable structure is designed inside the refueling cap 26 to ensure the air permeability of the hydraulic oil tank and avoid the formation of negative pressure in the oil tank. The lower ends of the first oil suction steel pipe 22 and the second oil suction steel pipe 23 are both provided with oil filters 21, and the end of the refueling steel pipe 27 away from the fuel tank cover 28 is provided with a refueling cap 26, and the lower end of the refueling cap 26 is provided with an oil dipstick 25.

[0031] Specifically, the first oil suction steel pipe 22, the second oil suction steel pipe 23, the oil return steel pipe 24 and the refueling steel pipe 27 are respectively fixed on the upper surface of the hydraulic oil tank 1 through the oil tank cover plate 28, and the ends of the first oil suction steel pipe 22 and the second oil suction steel pipe 23 are inserted into the interior of the hydraulic oil tank 1, so as to realize the suction of the hydraulic oil inside the hydraulic oil tank 1, and the hydraulic oil inside the hydraulic oil tank 1 is filtered by the end oil filter 21 of the first oil suction steel pipe 22 and the second oil suction steel pipe 23 to prevent the hydraulic oil from entering the first oil suction steel pipe 22 and the second oil suction steel pipe 23. Impurities, at the same time, the hydraulic oil tank 1 can be refueled through the refueling steel pipe 27, and the oil inlet of the refueling steel pipe 27 is sealed by the refueling cap 26 to prevent the hydraulic oil from leaking. Secondly, the oil dipstick 25 located in the refueling steel pipe 27 below the refueling cap 26 can monitor the hydraulic oil level in the hydraulic oil tank 1.

[0032] See also Figure 4 In one embodiment, in this embodiment, preferably, the installation kit includes a first mounting plate 30 fixed to the lower end surface of the fuel tank cover 28, and a second mounting plate 31 and a third mounting plate 33 are arranged in sequence below the first mounting plate 30. The first mounting plate 30, the second mounting plate 31 and the third mounting plate 33 are assembled together by a plurality of mounting bolts 34.

[0033] Specifically, the first mounting plate 30 is provided with a U-shaped groove through which the air nozzle steel pipe 322 passes, and the third mounting plate 33 and the second mounting plate 31 are both provided with mounting holes, and the mounting bolts 34 pass through the mounting holes on the third mounting plate 33 and the second mounting plate 31 and are threadedly connected to the threaded holes provided in the first mounting plate 30, thereby realizing the overall assembly of the mounting kit.

[0034] See also Figure 6-7 In one embodiment, in this embodiment, preferably, a fixing plate 14 is provided on the inner wall of the outer wall panel 11, and the fixing plate 14 is located at the rectangular opening of the outer wall panel 11, the fixing plate 14 has an L-shaped cross-section, and an upper rectangular opening and a lower rectangular opening are provided on the fixing plate 14, and the lower rectangular opening is consistent in size with the rectangular opening of the outer wall panel 11, so as to facilitate the subsequent disassembly and assembly of the fuel tank cover assembly 2 and the sealing assembly 3, and the outer wall panel 11, the fixing plate 14, the first mounting plate 30, the second mounting plate 31 and the third mounting plate 33 constitute an annular space for radial expansion of the airbag 321.

[0035] Specifically, by setting up the annular space, such as Figure 6 As shown, when the airbag 321 is in a normal state, it will not contact the inner wall of the fixing plate 14 in the annular space, and the fuel tank cover plate 28 can be quickly removed; Figure 7 As shown, when the airbag 321 expands, it will contact the inner wall of the fixed plate 14 in the annular space, and the fuel tank cover plate 28 can be fixed on the outer wall plate 11.

[0036] See also Figure 5 In one embodiment, in this embodiment, preferably, the outer surface of the air nozzle steel pipe 322 is provided with a sealing ring 324 connected to the fuel tank cover plate 28, and the outer surface of the air nozzle steel pipe 322 is located at the upper and lower ends of the fuel tank cover plate 28 and is installed with fixing nuts 323.

[0037] Specifically, the surface of the fuel tank cover 28 is provided with an installation through hole for the air nozzle steel pipe 322 to pass through, and the installation through hole is adapted to the sealing ring 324 to ensure the sealing here, and the two fixing nuts 323 arranged on the air nozzle steel pipe 322 can limit the upper and lower parts of the fuel tank cover 28 respectively, so as to fix the air nozzle steel pipe 322. Secondly, rubber parts such as the airbag 321 and the sealing ring 324 are made of hydraulic oil corrosion-resistant materials such as hydrogenated nitrile rubber. The upper and lower ends of the airbag 321 are high-elastic rubber with a cord layer, and the inner and outer ends of the airbag 321 are low-elastic hard rubber.

[0038] See also Figure 4 In one embodiment, in this embodiment, preferably, the thickness of the airbag 321 is 2 mm smaller than the thickness of the second mounting plate 31, so that a certain expansion space can be provided for the inflation of the airbag 321.

[0039] Specifically, nitrogen is inflated or released into the airbag 321 to expand or contract the upper and lower ends of the airbag 321 in the annular space, thereby realizing rapid installation, sealing or removal of the fuel tank cover plate 2 .

[0040] See also Figure 5 In one embodiment, in this embodiment, preferably, the air valve cap 325 has a built-in air pressure sensor that transmits air pressure data to the vehicle instrument, thereby realizing a low pressure alarm function.

[0041] The working principle and use process of the utility model are as follows: first, the fixing nut 323 of the outer surface of the air nozzle steel pipe 322 located at the lower end of the fuel tank cover plate 28 is adjusted to a suitable position, the second mounting plate 31 is nested inside the sealing member 32 (the air nozzle steel pipe 322 is located in the U-shaped groove adapted by the second mounting plate 31), the upper end of the third mounting plate 33 is fitted with the lower end of the second mounting plate 31 (the mounting holes are aligned), the first mounting plate 30 is welded to the lower end of the fuel tank cover plate 28, the fixing plate 14 is welded to the lower end of the outer wall plate (the rectangular opening under the fixing plate 14 is aligned with the rectangular opening of the outer wall plate 11), and at the same time, the air nozzle steel pipe 322 of the sealing member 32 is passed through the adapting hole on the fuel tank cover plate 28, and then 3. Install the second mounting plate 31, the seal 32 and the third mounting plate 33 on the lower end of the first mounting plate 30 by means of the mounting bolts 34, and install the sealing ring 324, the fixing nut 323 and the valve cap 325 of the valve steel pipe 322 whose outer surface is located at the upper end of the fuel tank cover 28 in sequence, adjust the fixing nuts 323 of the valve steel pipe 322 whose outer surface is located at the upper and lower ends of the fuel tank cover 28, and then install the fuel tank cover assembly 2 on the hydraulic oil tank 1, remove the valve cap 325, fill the seal 32 with nitrogen of a specified air pressure, install the valve cap 325, and check the air pressure data displayed on the vehicle instrument to achieve the installation and sealing of the fuel tank cover, and release the nitrogen in the seal 32 by disassembly.

[0042] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0043] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A tank cover plate bladder-type mounting sealing structure, comprising a hydraulic oil tank (1) and a tank cover plate assembly (2) arranged on the hydraulic oil tank (1), wherein a sealing assembly (3) for reducing oil leakage is arranged at the connection between the hydraulic oil tank (1) and the tank cover plate assembly (2), and characterized in that: The sealing assembly (3) comprises a mounting kit arranged below the fuel tank cover assembly (2) and a sealing member (32) arranged on the surface thereof; the sealing member (32) comprises an air bag (321), an air nozzle steel pipe (322) and an air nozzle cap (325); the air nozzle steel pipe (322) communicating with the interior of the air bag (321) is mounted on the surface of the air bag (321); the air nozzle cap (325) is mounted on the end of the air nozzle steel pipe (322) away from the air bag (321).

2. The fuel tank cover bladder type installation sealing structure according to claim 1, characterized in that: The hydraulic oil tank (1) is a container composed of an outer wall plate (11), an oil drain plug (12) and an inner wall plate (13), and has a rectangular opening at the upper end. The outer wall plate (11) is designed as an integral part of the forklift frame.

3. The fuel tank cover bladder type installation sealing structure according to claim 2 is characterized in that: The fuel tank cover plate assembly (2) comprises a fuel tank cover plate (28) and a first oil suction steel pipe (22), a second oil suction steel pipe (23), an oil return steel pipe (24) and a refueling steel pipe (27) mounted on the upper end surface of the fuel tank cover plate (28); an oil filter (21) is provided at the lower end of each of the first oil suction steel pipe (22) and the second oil suction steel pipe (23); a refueling cap (26) is provided at the end of the refueling steel pipe (27) away from the fuel tank cover plate (28); and an oil dipstick (25) is provided at the lower end of the refueling cap (26).

4. The fuel tank cover bladder type installation sealing structure according to claim 3, characterized in that: The mounting kit comprises a first mounting plate (30) fixed to the lower end surface of the fuel tank cover plate (28), a second mounting plate (31) and a third mounting plate (33) being arranged in sequence below the first mounting plate (30), and the first mounting plate (30), the second mounting plate (31) and the third mounting plate (33) being assembled together by means of a plurality of mounting bolts (34).

5. The fuel tank cover bladder type installation sealing structure according to claim 4, characterized in that: A fixing plate (14) is provided on the inner wall of the outer wall plate (11), and the fixing plate (14) is located at the rectangular opening of the outer wall plate (11); the fixing plate (14) has an L-shaped cross section, and an upper rectangular opening and a lower rectangular opening are provided on the fixing plate (14), and the lower rectangular opening is of the same size as the rectangular opening of the outer wall plate (11).

6. The fuel tank cover bladder type installation sealing structure according to claim 5, characterized in that: The outer wall plate (11), the fixing plate (14), the first mounting plate (30), the second mounting plate (31) and the third mounting plate (33) form an annular space.

7. The fuel tank cover bladder type installation sealing structure according to claim 3, characterized in that: The outer surface of the air nozzle steel pipe (322) is provided with a sealing ring (324) connected to the fuel tank cover plate (28), and fixing nuts (323) are installed at the upper end and the lower end of the outer surface of the air nozzle steel pipe (322) located on the fuel tank cover plate (28).

8. The fuel tank cover bladder type installation sealing structure according to claim 3, characterized in that: The thickness of the airbag (321) is 2 mm less than the thickness of the second mounting plate (31).

9. The fuel tank cover bladder type installation sealing structure according to claim 1, characterized in that: The air valve cap (325) has a built-in air pressure sensor for transmitting air pressure data to the vehicle instrument panel.

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