A loader oil tank adopting a rivet nut structure

Abstract

The utility model relates to a loader oil tank adopting rivet nut structure relates to engineering machinery equipment technical field, it includes hydraulic oil tank outside panel, rivet nut, rubber gasket, flange cover plate, combination gasket and bolt, rivet nut is fixed on hydraulic oil tank outside panel, rubber gasket covers on hydraulic oil tank outside panel and is located between hydraulic oil tank outside panel and flange cover plate, bolt penetrates flange cover plate and rubber gasket and is connected with rivet nut cooperation, combination gasket is covered on bolt and is located between flange cover plate and bolt. The utility model need not high temperature welding, can avoid the leakage caused by the weld defect, rivet nut structure is compact, can adapt to different plate thickness to improve the leakproofness, also can cancel the flange and realize light weight, and the mold expense is low, need not special welding equipment.

Description

Technical Field

[0001] This utility model relates to a wheel loader oil tank that eliminates the need for a welded flange and adopts a riveted nut method, belonging to the technical field of engineering machinery equipment. Background Technology

[0002] Among the many core systems of a wheel loader, the hydraulic oil tank plays a crucial role. As the key power source for the steering and working hydraulic systems, hydraulic oil is properly stored in the hydraulic oil tank, thus playing a vital role in transmitting energy and driving the operation of various components throughout the hydraulic system. Therefore, the hydraulic oil tank must meet stringent requirements in terms of sealing and pressure resistance to ensure that the hydraulic oil does not leak and that the tank can operate stably under certain pressure, maintaining the normal working condition of the hydraulic system.

[0003] Traditional hydraulic tank manufacturing primarily relies on welding sheet metal, a process that typically involves joining multiple sheet metal plates together with numerous weld seams. However, this welding process inevitably has significant drawbacks, the most prominent being the difficulty in guaranteeing weld quality. If defects such as porosity, inclusions, or incomplete penetration appear in the weld seams, they can easily become channels for hydraulic oil leakage. This can cause hydraulic oil to seep out from these tiny defects, affecting the normal operation of the hydraulic system and, in severe cases, even leading to loader malfunctions and safety hazards.

[0004] Furthermore, the inherent complexity of the welding process itself brings numerous inconveniences to production. From the perspective of the entire production process, traditional welding involves multiple steps. For example, even after automated welding, some weld seams still require manual repair to ensure their integrity and quality. This places high demands on manual welding skills, making skilled and highly proficient welders a key factor in guaranteeing product quality. Even so, the instability and variability of manual welding are still difficult to completely avoid, thus affecting the uniformity of weld quality.

[0005] From a production cost perspective, the energy consumption of welding equipment cannot be ignored. During welding, the equipment consumes a significant amount of electricity to generate high temperatures to melt the welding materials, undoubtedly increasing energy consumption and raising manufacturing costs. Simultaneously, the high-temperature environment generated during welding also brings a series of adverse effects. Firstly, high temperatures can easily cause thermal deformation of thin-plate parts during welding, directly affecting the overall dimensional and geometric accuracy of the oil tank. This can lead to fitting problems when the tank is assembled onto the loader, and even affect the normal layout and operation of the hydraulic system. Secondly, the high-temperature environment may accelerate the oxidation reaction on the steel plate surface, resulting in an oxide layer. This not only reduces the surface quality of the steel plate but may also pose a potential threat to the stability of the entire hydraulic system; for example, oxide layer peeling may cause internal contamination of the hydraulic system.

[0006] Traditional welding processes have many limitations in the manufacture of hydraulic oil tanks, including weld quality, production process complexity, energy consumption costs, and impact on material properties. There is an urgent need for a more advanced, reliable, and efficient manufacturing process to replace them, thereby improving the overall performance and production efficiency of hydraulic oil tanks. Utility Model Content

[0007] The purpose of this utility model is to provide a loader oil tank with a rivet nut structure. The hydraulic oil tank is changed from a welded structure to a rivet nut structure mainly to solve the inherent defects of traditional welding process. Through the innovation of the rivet nut structure, the goals of enhanced sealing, improved assembly efficiency, and optimized anti-vibration and anti-loosening properties are achieved.

[0008] To achieve the above objectives, the present invention provides a loader oil tank with a rivet nut structure, comprising an outer side plate of the hydraulic oil tank, a rivet nut, a rubber gasket, a flange cover plate, a combined gasket, and bolts. The rivet nut is fixed to the outer side plate of the hydraulic oil tank, the rubber gasket covers the outer side plate of the hydraulic oil tank and is located between the outer side plate of the hydraulic oil tank and the flange cover plate, the bolts pass through the flange cover plate and the rubber gasket and are connected to the rivet nut, and the combined gasket is fitted on the bolts and is located between the flange cover plate and the bolts.

[0009] Preferably, the outer side plate of the hydraulic oil tank is provided with a rivet position for fixing the rivet nut.

[0010] Preferably, the rivet nut is fixed to the outer side plate of the hydraulic oil tank by a riveting process, and its own plastic deformation tightly fits the outer side plate of the hydraulic oil tank to achieve mechanical deformation locking.

[0011] Preferably, the rubber gasket is thicker than the rivet nut, and its outer surface has a pattern to increase friction with the flange cover and prevent relative slippage.

[0012] Preferably, the rubber gasket is made of nitrile rubber, which, due to its oil resistance and high temperature resistance, can withstand temperatures up to 120°C for a short time, effectively compensating for the microscopic unevenness between the outer side plate of the hydraulic oil tank and the flange cover plate, blocking tiny leakage channels, and ensuring sealing performance.

[0013] Preferably, the flange cover plate covers the rubber gasket and cooperates with the outer side plate of the hydraulic oil tank to clamp the rubber gasket. It is provided with bolt holes corresponding to the bolts. The connection with the outer side plate of the hydraulic oil tank is achieved by the bolts and rivet nuts. When the bolts are tightened, a diagonal method is used to make the flange cover plate evenly stressed and avoid deformation caused by uneven local stress.

[0014] Preferably, the inner side of the combined gasket is a nitrile rubber sealing ring, which is fitted onto the bolt and located between the flange cover and the bolt head to prevent hydraulic oil from leaking from the gap between the bolt and the flange cover.

[0015] Preferably, the bolt is a semi-threaded bolt that passes through the flange cover plate and the rubber gasket and is connected with the rivet nut. The locking bolt achieves a tight connection between the outer side plate of the hydraulic oil tank and the flange cover plate, forming a stable rivet nut structure. This structure forms an annular indentation at the rear end of the riveting, further eliminating micro-leakage channels.

[0016] Preferably, the rivet nut undergoes multi-stage deformation during the riveting process to adapt to different plate thicknesses, resulting in a tighter connection between the outer side plate of the hydraulic oil tank and the flange cover plate.

[0017] Preferably, the shape and size of the rubber gasket match the contact area of ​​the outer side plate of the hydraulic oil tank and the flange cover plate, ensuring uniform distribution across the entire contact surface of the hydraulic oil tank, fully compensating for microscopic unevenness, achieving an all-around sealing effect, and the rubber gasket is kept in close contact with the outer side plate of the hydraulic oil tank and the flange cover plate by the tightening force of the bolts, thus playing a long-term and stable sealing role and ensuring the reliability and safety of the hydraulic oil tank during the use of the loader.

[0018] In summary, this utility model has the following beneficial technical effects:

[0019] This invention provides a novel hydraulic tank structure where the flange cover and the outer tank plate are connected using rivets instead of welding. This rivet nut structure achieves locking through mechanical deformation, eliminating the need for high-temperature welding and avoiding leakage risks caused by weld defects. For example, the rivet nut can adapt to different plate thicknesses through multi-stage deformation, improving sealing. Compared to welded structures, the rivet nut structure is more compact, allowing for a thinner flange cover and eliminating the flange between the flange cover and the outer tank plate, reducing weight and meeting the lightweight requirements of hydraulic tanks. The rivet nut mold is inexpensive and requires no specialized welding equipment, resulting in an overall cost reduction of over 20% compared to welding processes. Attached Figure Description

[0020] Figure 1 This is a partial view of a loader hydraulic oil tank using rivet nuts according to the present invention;

[0021] Figure 2 This is an overall view of a loader hydraulic oil tank using rivet nuts, according to this utility model.

[0022] Reference numerals in the attached diagram: 1. Outer side plate of hydraulic oil tank; 2. Rivet nut; 3. Rubber gasket; 4. Flange cover plate; 5. Combined gasket; 6. Bolt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model discloses a loader oil tank with a rivet nut structure, which includes an outer side plate 1 of the hydraulic oil tank, a rivet nut 2, a rubber gasket 3, a flange cover plate 4, a combination gasket 5, and a bolt 6.

[0025] The outer side plate 1 of the hydraulic oil tank is made of high-strength Q235B steel plate. This steel plate has good mechanical and machinability properties, ensuring the strength and stability of the overall structure of the hydraulic oil tank and providing a safe and reliable storage space for the internal hydraulic oil. The rivet nut 2 is fixed to the outer side plate 1 of the hydraulic oil tank using a riveting process. Compared with traditional welding, this fixing method avoids inherent defects that may occur during welding, such as porosity, slag inclusions, and uneven weld seams, effectively enhancing the sealing of the connection. At the same time, the riveting process is relatively simple, significantly improving assembly efficiency. Furthermore, at the moment of fixing, the rivet nut 2 can tightly fit against the outer side plate 1 of the hydraulic oil tank through its own plastic deformation, thus achieving good anti-vibration and anti-loosening effects, maintaining the reliability of the connection even under the complex working conditions and vibration environment of the loader.

[0026] A rubber gasket 3, made of nitrile rubber and thicker than the rivet nut 2, is placed on the steel plate. Its outer surface has a textured surface. This design increases the friction between the rubber gasket 3 and the flange cover plate 4, preventing relative slippage during hydraulic tank operation and further improving connection stability. When the flange cover plate 4 covers the rubber gasket 3, the gasket 3 sits between the outer side plate 1 of the hydraulic tank and the flange cover plate 4, playing a crucial sealing role. Nitrile rubber itself has excellent oil resistance and high-temperature resistance, capable of withstanding temperatures up to 120℃ for short periods. This adapts to the heat generated by the hydraulic oil inside the tank, effectively compensating for microscopic unevenness between the outer side plate 1 and the flange cover plate 4 caused by machining precision or assembly issues, blocking potential micro-leakage channels, and ensuring the sealing performance of the hydraulic tank. A mesh-like texture can be created on the rubber outer surface using a vulcanization molding process to increase the contact area and improve static sealing.

[0027] The inner side of the combined gasket 5 is a nitrile rubber sealing ring, which is fitted onto a conventional semi-threaded bolt 6. The bolt 6 passes through the flange cover plate 4 and the rubber gasket 3, and is connected to the rivet nut 2. The bolt 6 is tightened diagonally, which ensures that the flange cover plate 4 is evenly stressed, avoiding deformation caused by uneven local stress. This ensures that the rubber gasket 3 fits tightly against the outer side plate 1 of the hydraulic oil tank and the flange cover plate 4 across the entire contact surface, resulting in a better seal. The entire rivet nut structure forms an annular indentation at the riveting rear end, further eliminating potential micro-leakage channels and significantly improving the sealing performance of the hydraulic oil tank compared to traditional welded structures.

[0028] This utility model's hydraulic tank structure, by eliminating the flange that originally required welding, not only saves materials and reduces costs, but also, because the cost of the rivet nut 2 mold is lower than that of welding fixtures, and the generation of welding fumes is avoided during the manufacturing process, it aligns with the trend of green and low-carbon development. Furthermore, the rivet nut structure is more compact than the welded structure, allowing the flange cover plate 4 to be made thinner, and eliminating the flange between the flange cover plate 4 and the outer side plate 1 of the hydraulic tank, effectively reducing the weight of the hydraulic tank and meeting the requirement for lightweight hydraulic tanks. The overall cost is reduced by more than 20% compared to the welding process, demonstrating significant economic benefits and practical value.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A loader fuel tank employing a rivet nut structure, characterized in that, The device includes an outer side plate (1) of a hydraulic oil tank, a rivet nut (2), a rubber gasket (3), a flange cover plate (4), a combination gasket (5), and a bolt (6). The rivet nut (2) is fixed on the outer side plate (1) of the hydraulic oil tank. The rubber gasket (3) covers the outer side plate (1) of the hydraulic oil tank and is located between the outer side plate (1) of the hydraulic oil tank and the flange cover plate (4). The bolt (6) passes through the flange cover plate (4) and the rubber gasket (3) and is connected to the rivet nut (2). The combination gasket (5) is fitted on the bolt (6) and is located between the flange cover plate (4) and the bolt (6).

2. The loader oil tank with a rivet nut structure according to claim 1, characterized in that, The outer side plate (1) of the hydraulic oil tank is provided with a rivet position for fixing the rivet nut (2).

3. A loader oil tank with a rivet nut structure according to claim 2, characterized in that, The rivet nut (2) is fixed to the outer side plate (1) of the hydraulic oil tank by riveting process. It uses its own plastic deformation to fit tightly with the outer side plate (1) of the hydraulic oil tank, so as to achieve mechanical deformation locking.

4. A loader oil tank with a rivet nut structure according to claim 1, characterized in that, The rubber gasket (3) is thicker than the nut of the rivet nut (2), and its outer surface is patterned to increase the friction between it and the flange cover plate (4) and prevent relative sliding.

5. A loader oil tank with a rivet nut structure according to claim 4, characterized in that, The rubber gasket (3) is made of nitrile rubber. With its oil resistance and high temperature resistance, it can withstand temperatures up to 120°C for a short time, effectively compensating for the micro-unevenness between the outer side plate (1) of the hydraulic oil tank and the flange cover plate (4), blocking the micro-leakage channels, and ensuring sealing performance.

6. A loader oil tank with a rivet nut structure according to claim 1, characterized in that, The flange cover (4) covers the rubber gasket (3) and cooperates with the outer side plate (1) of the hydraulic oil tank to clamp the rubber gasket (3). Bolt holes corresponding to the bolts (6) are provided on it. The connection with the outer side plate (1) of the hydraulic oil tank is achieved by the bolts (6) and the rivet nuts (2). When the bolts (6) are tightened, a diagonal method is adopted to make the flange cover (4) evenly stressed and avoid deformation caused by uneven local stress.

7. A loader oil tank with a rivet nut structure according to claim 1, characterized in that, The inner side of the combined gasket (5) is a nitrile rubber sealing ring, which is fitted on the bolt (6) and located between the flange cover plate (4) and the head of the bolt (6) to prevent hydraulic oil from leaking from the gap between the bolt (6) and the flange cover plate (4).

8. A loader oil tank with a rivet nut structure according to claim 1, characterized in that, The bolt (6) is a semi-threaded bolt that passes through the flange cover plate (4), the rubber gasket (3) and is connected with the rivet nut (2). By tightening the bolt (6), the outer side plate (1) of the hydraulic oil tank and the flange cover plate (4) are tightly connected, forming a stable rivet nut structure. This structure forms an annular indentation at the riveting end, further eliminating micro-leakage channels.

9. A loader oil tank with a rivet nut structure according to claim 1, characterized in that, The rivet nut (2) undergoes multi-stage deformation under the riveting process to adapt to different plate thicknesses, making the connection between the outer side plate (1) of the hydraulic oil tank and the flange cover plate (4) tighter.

10. A loader oil tank with a rivet nut structure according to claim 1, characterized in that, The shape and size of the rubber gasket (3) match the contact area of ​​the outer side plate (1) and flange cover plate (4) of the hydraulic oil tank, ensuring that it is evenly distributed on the entire contact surface of the hydraulic oil tank, fully compensating for micro-irregularities, and achieving an all-round sealing effect. The rubber gasket (3) is tightly fitted with the outer side plate (1) and flange cover plate (4) of the hydraulic oil tank by the locking force of the bolts (6), which plays a long-term and stable sealing role, ensuring the reliability and safety of the hydraulic oil tank during the use of the loader.

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