Anti-deformation fixing installation structure of iron sheet fuel tank

Abstract

The utility model discloses a kind of anti-deformation fixed mounting structures of sheet iron fuel tank, including fixed seat, the top of fixed seat is provided with the installation component for fixing sheet iron oil tank body, installation component includes rotatable rotating frame, rotating frame is installed with the fixed component for fixing sheet iron oil tank body, the both sides of rotating frame are rotatably installed with connecting shaft, and rotating frame is rotatably installed on fixed seat by connecting shaft.The utility model installs, only needs to rotate rotating frame and simple operation such as threaded sleeve to complete, greatly improve installation efficiency, save manpower cost;Its anti-deformation effect is remarkable, through protective pad and washer from top and bottom all-around fixed oil tank, make each part stress uniform, avoid the deformation caused by fixation, prolong the service life of oil tank.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal fuel tank installation technology, and in particular to a deformation-resistant and fixed installation structure for sheet metal fuel tanks. Background Technology

[0002] In the design and installation of vehicle fuel systems, the fixed installation structure of the fuel tank is crucial, as it not only affects the stability of the fuel tank but also directly impacts its service life and the safety of vehicle operation. Currently, various fuel tank fixing methods exist on the market, such as the bus fuel tank mounting and fixing device disclosed in publication number CN211075528U. This device matches and verifies the dimensions of the fuel tank, designing clamps that conform to its external dimensions, and then uses these clamps to fix the fuel tank in place. In practical applications, the position of the fuel tank can be fine-tuned by adjusting the tightness of the clamp bolts, facilitating minor adjustments. Installing and removing the fuel tank only requires removing one bolt from each of the two clamps. Furthermore, the device includes a clamping cylinder that drives a telescopic rod to move, thereby causing a sliding plate to clamp or release the fuel tank located above the fixing plate, thus cooperating with the clamps to fix or remove the fuel tank. This design greatly facilitates maintenance and disassembly work, eliminating the need for a dedicated fuel tank access door, reducing manufacturing costs, and simplifying installation and maintenance procedures with lower technical requirements for workers.

[0003] However, the existing method of securing the fuel tank with clamps has revealed some problems in practical use. Due to the nature of the contact and fixing methods between the clamps and the fuel tank, it is difficult to ensure that the force on different parts of the fuel tank is completely uniform during the fixing process. This can easily lead to deformation of the fuel tank due to uneven stress. This is especially true for fuel tanks made of sheet metal, which are relatively soft and are more prone to deformation when subjected to uneven external forces. Fuel tank deformation not only affects its normal fuel storage function but may also cause fuel leaks and other safety hazards, posing a serious threat to the safe operation of the vehicle. Utility Model Content

[0004] The purpose of this utility model is to provide a deformation-resistant fixing installation structure for sheet metal fuel tanks. During installation, only simple operations such as rotating the rotating bracket and threaded sleeve are required, which greatly improves installation efficiency and saves labor costs. Its deformation-resistant effect is significant. The fuel tank is fixed from the top and bottom from all directions by protective pads and washers, so that the force on each part is even, avoiding deformation caused by fixing and extending the service life of the fuel tank.

[0005] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0006] A deformation-resistant fixing installation structure for a sheet metal fuel tank, comprising:

[0007] A fixing base is provided on the top of which is an installation assembly for fixing the sheet metal fuel tank body. The installation assembly includes a rotatable rotating frame, on which a fixing component for fixing the sheet metal fuel tank body is installed.

[0008] In the aforementioned anti-deformation fixing installation structure for sheet metal fuel tanks, a connecting shaft is rotatably installed on both sides of the rotating frame, and the rotating frame is rotatably installed on the fixed base via the connecting shaft.

[0009] The aforementioned anti-deformation fixing installation structure for the sheet metal fuel tank includes a fixing component comprising a mounting base fixedly connected to the rotating frame, and a U-shaped fixing frame for fixing the top of the sheet metal fuel tank body is provided below the mounting base in a height-adjustable manner.

[0010] The aforementioned anti-deformation fixing installation structure for the sheet metal fuel tank includes a protective pad on the inner wall of the U-shaped fixing bracket for protecting the top of the sheet metal fuel tank body, and a washer on the inner wall of the fixing seat for protecting the bottom of the sheet metal fuel tank body.

[0011] The aforementioned anti-deformation fixing installation structure for the sheet metal fuel tank includes a limiting telescopic rod fixedly connected to both sides of the bottom of the mounting base, and the other end of the limiting telescopic rod is fixedly connected to the top of the U-shaped fixing frame.

[0012] The aforementioned anti-deformation fixing installation structure for the sheet metal fuel tank includes a threaded sleeve fixedly connected to the mounting base, a fixing bolt for adjusting the lifting and lowering of the U-shaped fixing frame threadedly connected to the threaded sleeve, and the bottom of the fixing bolt being rotatably connected to the top of the U-shaped fixing frame via a bearing.

[0013] This utility model has at least the following beneficial effects:

[0014] This invention provides a deformation-resistant and secure installation structure for sheet metal fuel tanks. When installing the fuel tank, the operator simply rotates the rotating frame around the connecting shaft to a suitable position, then smoothly places the fuel tank onto the fixed base. Next, the rotating frame is rotated back to the working position, and then the threaded sleeve is rotated. The threaded engagement between the threaded sleeve and the fixing bolt causes the U-shaped fixing frame to move smoothly downwards. The protective pad on the inner wall of the U-shaped fixing frame contacts the top of the fuel tank, and simultaneously, in conjunction with the washer on the inner wall of the fixing base, secures the fuel tank from both top and bottom. This fixing method ensures even stress distribution across all parts of the tank, effectively preventing deformation caused by excessive localized stress due to fixed installation, and significantly improving the service life and safety of the sheet metal fuel tank. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a schematic diagram of the anti-deformation fixing and installation structure of the sheet metal fuel tank of this utility model;

[0017] Figure 2 This is a schematic diagram of another state of the anti-deformation fixing and installation structure of the sheet metal fuel tank of this utility model;

[0018] Figure 3 This is a schematic diagram of the fixing base in the anti-deformation fixing installation structure of the sheet metal fuel tank of this utility model;

[0019] Figure 4 This is a schematic diagram of the installation components in the anti-deformation fixing installation structure of the sheet metal fuel tank of this utility model;

[0020] Figure 5 This is a schematic diagram of the fixing component in the anti-deformation fixing installation structure of the sheet metal fuel tank of this utility model.

[0021] Explanation of icon numbers:

[0022] 1. Mounting bracket; 2. Sheet metal fuel tank body; 3. Mounting components;

[0023] 301. Rotating frame; 3011. Fixing assembly;

[0024] 302. Connecting shaft;

[0025] 303. Mounting base; 3031. U-shaped fixing bracket;

[0026] 304 stainless steel, protective pad; 3041 stainless steel, gasket;

[0027] 305. Limiting telescopic rod;

[0028] 306, threaded sleeve; 3061, fixing bolt. Detailed Implementation

[0029] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0030] Please refer to Figures 1 to 5As shown in the figure, an embodiment of the present invention provides a deformation-resistant fixing installation structure for a sheet metal fuel tank, comprising: a fixing base 1, the top of the fixing base 1 being provided with an installation component 3 for fixing the sheet metal fuel tank body 2, the installation component 3 including a rotatable rotating frame 301, and a fixing component 3011 for fixing the sheet metal fuel tank body 2 being installed on the rotating frame 301.

[0031] To enable the rotating frame 301 to rotate flexibly on the fixed base 1, and to prevent wobbling due to excessive clearance during rotation, in this embodiment: connecting shafts 302 are rotatably mounted on both sides of the rotating frame 301, and the rotating frame 301 is rotatably mounted on the fixed base 1 via the connecting shafts 302. The connecting shafts 302 are made of 45# steel (heat treated, hardness HRC28-32), and the clearance between them and the rotating frame 301 and the fixed base 1 is controlled at 0.05-0.1mm. The surface of the shaft is coated with wear-resistant grease (lithium-based grease) to ensure smooth rotation and prevent the clearance from increasing over time. Simultaneously, elastic retaining rings (specifications adapted to the shaft diameter) are provided at both ends of the connecting shaft 302 to limit axial movement of the shaft and prevent the rotating frame 301 from shifting and affecting subsequent fixing accuracy. This design allows the rotating frame 301 to rotate freely around the connecting shaft 302. When installing and disassembling the sheet metal fuel tank body 2, the operator can easily rotate the rotating frame 301 to a suitable position, providing ample space for the placement and removal of the sheet metal fuel tank body 2. This greatly improves the convenience of installation and disassembly, reduces the difficulty of operation, and saves time and labor costs.

[0032] In order to effectively fix the top of the sheet metal fuel tank body 2 and flexibly adjust the fixing height, while enhancing the anti-deformation capability of the U-shaped fixing frame, in this embodiment: the fixing component 3011 includes a mounting base 303 fixedly connected to the rotating frame 301, and a U-shaped fixing frame 3031 for fixing the top of the sheet metal fuel tank body 2 is provided below the mounting base 303 in a height-adjustable manner. A threaded sleeve 306 is fixedly connected to the mounting base 303, and a fixing bolt 3061 for adjusting the height of the U-shaped fixing frame 3031 is threadedly connected to the threaded sleeve 306. The bottom of the fixing bolt 3061 is rotatably connected to the top of the U-shaped fixing frame 3031 through a bearing. The U-shaped fixing bracket 3031 is made of 6061 aluminum alloy (T6 heat treated, tensile strength ≥260MPa). Its inner wall adopts an arc design that matches the curvature of the top of the sheet metal fuel tank body 2 (arc value R20-R30mm, customized according to the actual size of the fuel tank), increasing the contact area to over 90% and avoiding localized stress. Simultaneously, the opening width of the U-shaped fixing bracket 3031 can be finely adjusted (adjustment range ±5mm) via the adjusting screws (M6 specification) on both sides, adapting to sheet metal fuel tanks with widths of 180-250mm, enhancing versatility. When it is necessary to fix the sheet metal fuel tank body 2, rotating the threaded sleeve 306 causes the fixing bolt 3061 to smoothly rise or fall under the action of the threaded transmission. This allows for precise adjustment of the distance between the U-shaped fixing bracket 3031 and the top of the sheet metal fuel tank body 2, ensuring stable fixation for sheet metal fuel tank bodies 2 of different specifications, enhancing the versatility and adaptability of this fixing installation structure.

[0033] In order to effectively protect the top and bottom of the sheet metal fuel tank body 2 and avoid damage to it during the fixing process, while improving the buffering and anti-deformation effect, in this embodiment: a protective pad 304 for protecting the top of the sheet metal fuel tank body 2 is provided on the inner wall of the U-shaped fixing bracket 3031, and a washer 3041 for protecting the bottom of the sheet metal fuel tank body 2 is provided on the inner wall of the fixing seat 1. Both the protective pad 304 and the washer 3041 are made of oil-resistant NBR nitrile rubber (Shore hardness 50-60HA, oil resistance grade IRM903), with a thickness of 3-5mm. The surface of the protective pad 304 features a honeycomb texture design (honeycomb aperture 2mm, depth 1mm) to enhance the buffering and energy absorption effect. The protective pad 304 and the U-shaped fixing bracket 3031 are fixed by a dual method of "adhesion + countersunk bolt fixing" (countersunk bolt specification M4, spacing 50mm). The washer 3041 and the fixing seat 1 are positioned by an annular groove (groove depth 1mm, width consistent with the washer thickness) to prevent the protective components from shifting due to long-term vibration and losing their buffering function. The protective pad 304 and the washer 3041 can play a buffering role, reducing the direct impact of fixing pressure on the sheet metal fuel tank body 2, preventing the surface of the fuel tank from being scratched or deformed, effectively extending the service life of the sheet metal fuel tank body 2, and reducing maintenance costs.

[0034] To ensure the stability of the U-shaped fixing frame 3031 during lifting and lowering, prevent it from shifting, and accommodate oil tanks of different heights, in this embodiment: limiting telescopic rods 305 are fixedly connected to both sides of the bottom of the mounting base 303, and the other end of the limiting telescopic rods 305 is fixedly connected to the top of the U-shaped fixing frame 3031. The limiting telescopic rods 305 adopt a multi-stage telescopic structure (maximum telescopic stroke 50-80mm), with a built-in compression spring (wire diameter 1.2mm, free length 20mm, pre-compression 3-5mm). The spring force always keeps the telescopic rod in a stable extended state, avoiding swaying. The clearance between the inner and outer rods of the telescopic rod is controlled at 0.03-0.05mm, and a guide groove (width 2mm, depth 1mm) is provided on the inner wall of the outer rod, and a guide boss is provided at the corresponding position of the inner rod to prevent the telescopic rod from rotating circumferentially, ensuring that the U-shaped fixing frame 3031 moves only in the vertical direction. During the lifting and lowering process of the U-shaped fixing frame 3031, the limiting telescopic rod 305 will extend and retract with the movement of the U-shaped fixing frame 3031, always maintaining the limiting effect on the U-shaped fixing frame 3031, so that it can only move up and down in the vertical direction, without swaying or tilting to the left or right. This ensures that the U-shaped fixing frame 3031 can accurately contact the top of the sheet metal oil tank body 2 and apply uniform pressure, further improving the stability and reliability of the fixing.

[0035] To enhance the load-bearing capacity of the mounting base 1 and prevent its deformation from indirectly causing the fuel tank to shift, in this embodiment: the mounting base 1 is made of Q235 cold-rolled steel plate (thickness 8-10mm), and a cross-shaped reinforcing rib is set at the bottom (rib thickness 6mm, height 15mm, integrally stamped with the mounting base). The reinforcing rib covers more than 60% of the bottom area of ​​the mounting base, improving the overall rigidity. The connection between the mounting base 1 and the vehicle frame is made of 4 sets of M8 high-strength bolts (material grade 8.8, surface galvanized for rust prevention). The bolt spacing is set to 150-200mm according to the size of the mounting base, and a reinforcing bushing (material Q345 steel, thickness 5mm) is set at the bolt mounting hole to disperse the local pressure of the bolt preload on the mounting base.

[0036] The working principle of this utility model is as follows:

[0037] When installing the sheet metal fuel tank body 2, first rotate the rotating frame 301 around the connecting shaft 302 until it is as follows. Figure 2 The position shown is convenient for placing the fuel tank (the recommended rotation angle is 90°-120° to ensure sufficient operating space). At this time, the gasket 3041 on the inner wall of the fixed seat 1 is precisely positioned through the annular groove, and the sheet metal fuel tank body 2 is placed stably on the gasket 3041. The honeycomb pattern of the gasket initially buffers the pressure brought by the weight of the fuel tank.

[0038] Next, rotate the rotating frame 301 back to its original position. Figure 1The working position shown aligns the arc-shaped inner wall of the U-shaped fixing bracket 3031 with the center line of the top of the fuel tank (alignment can be achieved by visual observation or by using the positioning scale lines); then, use a wrench to rotate the threaded sleeve 306. At this time, a torque wrench is needed to control the downward torque of the fixing bolt 3061: initially, preload with a torque of 5-8 N·m, and after the protective pad 304 is completely in contact with the top of the fuel tank, add torque to 8-12 N·m (the upper limit is taken when the thickness of the sheet metal fuel tank is ≤1.5mm, and the lower limit is taken when the thickness is >1.5mm) to avoid excessive torque causing the fuel tank to dent and deform, or insufficient torque causing the fixing to loosen; during the downward movement of the U-shaped fixing bracket 3031, the guide groove of the limiting telescopic rod 305 cooperates with the boss to ensure its vertical movement. Finally, through the double buffering and uniform force distribution of the protective pad 304 and the washer 3041, the sheet metal fuel tank body 2 is stably installed, effectively avoiding deformation of the fuel tank during the fixing process and ensuring the safe use of the sheet metal fuel tank.

[0039] During the later maintenance phase, it is recommended to perform an inspection every 3 months: 1) Check the wear of the protective pad 304 and washer 3041. If the surface crack length exceeds 5mm or the compression exceeds 30% of the initial thickness, they need to be replaced in time; 2) Use a torque wrench to check the torque of the fixing bolt 3061 and the frame connecting bolt. If the torque decreases by more than 20%, it needs to be tightened back to the set value; 3) Check the smoothness of the rotation of the connecting shaft 302. If there is jamming, wear-resistant grease needs to be applied to prevent the rotation clearance from increasing and affecting the fixing accuracy.

[0040] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A deformation-resistant fixing installation structure for a sheet metal fuel tank, comprising a fixing base (1), characterized in that, The top of the fixed base (1) is provided with an installation assembly (3) for fixing the sheet metal oil tank body (2). The installation assembly (3) includes a rotatable rotating frame (301), and a fixing assembly (3011) for fixing the sheet metal oil tank body (2) is installed on the rotating frame (301).

2. The anti-deformation fixing installation structure for a sheet metal fuel tank according to claim 1, characterized in that: The rotating frame (301) is rotatably mounted on both sides with connecting shafts (302), and the rotating frame (301) is rotatably mounted on the fixed base (1) through the connecting shafts (302).

3. The anti-deformation fixing installation structure for a sheet metal fuel tank according to claim 2, characterized in that: The fixing component (3011) includes a mounting base (303) fixedly connected to the rotating frame (301), and a U-shaped fixing bracket (3031) for fixing the top of the sheet metal oil tank body (2) is provided below the mounting base (303) in a height-adjustable manner.

4. The anti-deformation fixing installation structure for a sheet metal fuel tank according to claim 3, characterized in that: The inner wall of the U-shaped fixing frame (3031) is provided with a protective pad (304) for the top protection of the sheet metal oil tank body (2), and the inner wall of the fixing seat (1) is provided with a washer (3041) for the bottom protection of the sheet metal oil tank body (2).

5. The anti-deformation fixing installation structure for a sheet metal fuel tank according to claim 4, characterized in that: Limiting telescopic rods (305) are fixedly connected to both sides of the bottom of the mounting base (303), and the other end of the limiting telescopic rods (305) is fixedly connected to the top of the U-shaped fixing frame (3031).

6. The anti-deformation fixing installation structure for a sheet metal fuel tank according to claim 5, characterized in that: A threaded sleeve (306) is fixedly connected to the mounting base (303), and a fixing bolt (3061) for adjusting the lifting of the U-shaped fixing frame (3031) is threadedly connected to the threaded sleeve (306). The bottom of the fixing bolt (3061) is rotatably connected to the top of the U-shaped fixing frame (3031) through a bearing.

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