A flexible snap-fit ​​oil supply device

Abstract

This utility model relates to an elastic snap-fit ​​oil supply device, including an oil tank, a controller, a base, and an oil gun. The controller is connected to the oil tank mounting part through an elastic snap-fit ​​unit: the elastic snap-fit ​​unit includes a pre-compressed elastic element and a protrusion. During installation, pressing the controller causes the protrusion to retract and snap into the embedding groove. The elastic element releases radial rebound force to drive the protrusion to continuously press against the groove wall, forming a vibration-resistant self-locking fixation.

Description

Technical Field

[0001] This utility model relates to the field of fuel tank technology, specifically to a flexible snap-fit ​​fuel supply device. Background Technology

[0002] Fuel tanks are widely used in industrial production and daily life, especially in mobile refueling scenarios. Fuel is usually first poured into the tank from a gas station or oil drum, and then supplied to the corresponding equipment after the tank is moved to the target location.

[0003] To achieve intelligent control of fuel tank discharge, existing fuel tanks are generally equipped with controllers to regulate the automatic discharge of fuel. For example, a fuel tank disclosed in US Patent (US18775438) uses an electronic box to achieve intelligent control of fuel discharge.

[0004] However, most existing fuel tank control modules (such as the aforementioned electronic boxes and controllers) are fixed using screws or threaded connections. This fixing method not only increases material input and manufacturing costs in the production process, but more importantly, during long-term use, factors such as equipment vibration and component wear can easily lead to loosening or even detachment of the connections, seriously affecting the reliability of the control module's fixation. This can potentially lead to risks such as oil leakage and control failure. At the same time, during installation, workers need to frequently use screwdrivers, which is not only cumbersome but also significantly reduces installation efficiency, causing many inconveniences in actual operation. Summary of the Invention

[0005] This invention provides a flexible snap-fit ​​oil supply device to solve the problems mentioned in the background art.

[0006] To achieve the above-mentioned objectives, this utility model adopts the following technical solution:

[0007] A resilient snap-fit ​​oil supply device includes: an oil tank with a mounting part having at least one embedding groove; and a controller disposed within the mounting part, including a base and at least one resilient snap-fit ​​unit. The resilient snap-fit ​​unit includes an elastic element and a protrusion driven by the elastic element. The controller is detachably fixed to the mounting part by snapping the protrusion into the embedding groove, and the elastic element generates a continuous rebound force after the protrusion is snapped into the embedding groove, keeping the protrusion and the embedding groove tightly fitted, thus achieving self-tightening fixation.

[0008] Furthermore, the inner bottom wall of the base is fixed with two opposing fixed chambers, and the elastic element is set in the fixed chamber; extension holes communicating with the fixed chambers are opened on both sides of the base, and the protruding post is inserted into the extension hole and connected to the elastic element.

[0009] Furthermore, the elastic element includes a V-shaped elastic sheet, which is movably engaged within the fixed chamber.

[0010] Furthermore, a connecting pipe is fixed at the bottom of the base. One end of the connecting pipe is equipped with a threaded connector, and the other end is equipped with an oil outlet pipe. The oil outlet pipe is compatible with the oil outlet and can be inserted into the oil tank.

[0011] Furthermore, the connecting pipe has an L-shaped structure, with one end of the oil outlet pipe fixedly connected to the connecting pipe; a first groove is provided on the inner wall of the oil outlet pipe, and a first sealing ring is fixed in the groove, with the first sealing ring in close contact with the outer wall of the connecting pipe; a second groove is provided on the outer surface of the connecting pipe, and a second sealing ring is fixed in the groove, with the second sealing ring in close contact with the inner wall of the oil outlet.

[0012] Furthermore, a handle is fixed to the top of the fuel tank, and a protective cover is hinged to the side of the handle facing the mounting part; the protective cover can be rotated to fit against the top of the fuel tank and completely cover the top of the controller.

[0013] Furthermore, the protective cover includes a flat end and an extended end, which are arranged in an L-shape. A groove is provided in the middle of the extended end, and the side of the groove opposite to the flat end extends to the outside. When the flat end is in contact with the top of the oil tank, the threaded connector extends into the groove.

[0014] Furthermore, the groove edge extends outward to form a convex strip, the length of which is flush with the threaded connector. Mounting holes are symmetrically opened on both sides of the convex strip and below the threaded connector. A connecting ring is fixed on the surface of the oil tank at the position corresponding to the inner side of the convex strip. When the flat end is in contact with the top of the oil tank, the mounting hole and the center of the connecting ring are located on the same plane, and multiple mounting holes and connecting rings are movably connected with a combination lock.

[0015] Furthermore, it also includes an oil gun, which is equipped with an oil delivery pipe and is connected to a threaded connector through the oil delivery pipe.

[0016] Furthermore, an oil inlet pipe is fixed to the top of the oil tank, and an oil tank cover is threaded onto the outer wall of the oil inlet pipe. The oil tank cover has a through opening in the center, and a vent valve is integrally formed on the inner wall of the opening. A threaded rod is threaded onto the inner wall of the vent valve.

[0017] The advantages of this utility model compared to the prior art are as follows: It replaces the traditional screw or threaded fixing method with a snap-fit ​​structure of elastic sheet, protrusion, and embedded groove. This allows for quick installation and disassembly of the controller without tools, solving the problem of high cost associated with existing fixing methods. Simultaneously, it avoids the cumbersome operation caused by frequent screwdriver use, significantly improving assembly efficiency and structural stability during long-term use. After the protrusion is snapped into the embedded groove, the elastic sheet generates a continuous rebound force due to deformation, constantly applying an outward pushing force to the protrusion, ensuring a tight fit between the protrusion and the inner wall of the embedded groove, forming a self-tightening fixation. In vibration or impact environments, the deformation of the elastic sheet can buffer external forces, preventing gaps from forming between the protrusion and the embedded groove due to rigid collision, ensuring a stable connection. This solves the problems of traditional threaded connections lacking active pre-tightening force and being prone to loosening due to external forces. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0019] Figure 1 This is a perspective view of an embodiment of the present invention.

[0020] Figure 2 for Figure 1 The embodiment shows a schematic diagram of the fuel tank structure.

[0021] Figure 3 for Figure 2 A three-dimensional sectional view of the interior of the fuel tank in the illustrated embodiment.

[0022] Figure 4 for Figure 3 Enlarged view of point A in the illustrated embodiment.

[0023] Figure 5 for Figure 3 Enlarged view of point B in the illustrated embodiment.

[0024] Figure 6 for Figure 2 A schematic diagram of the connection between the fuel tank and the protective cover in the embodiment shown.

[0025] Figure 7 for Figure 6 A schematic diagram of the protective cover in the illustrated embodiment.

[0026] Figure 8 for Figure 2 The diagram shows the connection between the fuel tank and the controller in the illustrated embodiment.

[0027] Figure 9 for Figure 8 A perspective sectional view of the interior of the fuel tank in the illustrated embodiment.

[0028] Figure 10 for Figure 9 Enlarged view of point D in the illustrated embodiment.

[0029] Figure 11 for Figure 8 A schematic diagram showing the separation of the fuel tank and controller in the embodiment shown.

[0030] Figure 12 for Figure 2 A schematic diagram of the mounting slot in the embodiment shown.

[0031] Figure 13 for Figure 11 A schematic diagram of the internal structure of the controller in the embodiment shown.

[0032] Figure 14 for Figure 2 The diagram shows the connection between the ferrule and the fuel tank cap in the embodiment shown.

[0033] Figure 15 for Figure 14 Enlarged view of point C in the illustrated embodiment.

[0034] Figure 16 for Figure 1 A schematic diagram of the base structure in the illustrated embodiment.

[0035] Reference numerals: fuel tank (100); mounting groove (110); embedding groove (111); oil outlet (130); handle (140); protective cover (150); flat end (151); extension end (152); slide groove (153); protrusion (154); connecting ring (156); combination lock (157); fuel tank filling port (160); fuel tank cap (161); vent valve (162); inclined tooth (163); threaded rod (164); gasket (170); ferrule (171); spring (172); placement block (180); controller (200) ; Base (210); Fixed compartment (220); Elastic element (230); Elastic sheet (231); Protrusion (232); Extension hole (240); Connecting pipe (250); Threaded connector (251); Oil inlet pipe (252); First sealing ring (253); Second sealing ring (254); Base (300); Moving wheel (310); Pull rod (320); Paddle (330); Placement hole (340); Pedal (350); Oil gun (400); Oil delivery pipe (410); Mounting plate (500); Slot (510); Net structure (600). Detailed Implementation

[0036] 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, not all embodiments. The following description of at least one exemplary embodiment is illustrative in nature and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary rather than limiting. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0039] A flexible snap-fit ​​oil supply device includes an oil tank 100, a controller 200, a base 300, and an oil gun 400 (please refer to...). Figure 1 ).

[0040] In this embodiment, please refer to Figure 11 and Figure 12 The top of the oil tank 100 is provided with an installation groove 110, which is partially connected to the outside and its size is adapted to the controller 200. An embedding groove 111 with one end connected to the outside is provided on the inner wall of both sides of the installation groove 110. An oil outlet 130 communicating with the inside of the oil tank 100 is provided on the bottom wall of the installation groove 110.

[0041] In this embodiment, please refer to Figure 4 , Figure 5 and Figure 8 The controller 200 includes a base 210 and a control module. A connecting pipe 250 is fixedly installed at the bottom of the base 210. A threaded connector 251 is fixedly installed at one end of the connecting pipe 250, and an oil inlet pipe 252 is provided at the other end of the connecting pipe 250. The oil inlet pipe 252 is set vertically relative to the base 210.

[0042] In other embodiments, please refer to Figure 4The connecting pipe 250 adopts an L-shaped design, and one end of the oil inlet pipe 252 can be fixedly connected to the connecting pipe 250. The inner wall of the oil inlet pipe 252 is provided with a first groove, and a first sealing ring 253 is fixed in the groove, and its surface is in close contact with the outer wall of the connecting pipe 250. The outer surface of the connecting pipe 250 is provided with a second groove, and a second sealing ring 254 is fixed in the groove, which is in close contact with the inner wall of the oil outlet 130.

[0043] The L-shaped design of the connecting pipe 250 can flexibly adapt to the spatial layout inside or around the oil tank. Especially when the installation environment is limited (such as when the pipeline needs to be turned or avoid other components), it can reduce space occupation and improve the compactness of the overall structure. At the same time, a double sealing structure is formed by the first sealing ring 253 and the second sealing ring 254: the first sealing ring 253 seals the connection gap between the oil inlet pipe 252 and the connecting pipe 250, and the second sealing ring 254 seals the connection gap between the connecting pipe 250 and the oil outlet 130. This can effectively block the oil leakage path, greatly improve the sealing reliability, and reduce oil waste or safety hazards caused by oil leakage.

[0044] In other embodiments (not shown in the figures), the connecting pipe 250 and the oil inlet pipe 252 are connected by a "quick-connect-rotation lock": the end of the connecting pipe 250 is provided with an annular protrusion, the inner wall of the oil inlet pipe 252 is provided with an L-shaped guide groove, and the first sealing ring 253 is made of polyurethane material with a triangular cross-section. During assembly, the connecting pipe 250 is inserted into the oil inlet pipe 252 and rotated 90 degrees. The annular protrusion slides into the locking position along the guide groove, and the sealing ring is compressed to form a seal. Compared with the threaded connection, the quick-release structure shortens the disassembly and assembly time, and the triangular sealing ring has a better sealing effect under pressure, which is suitable for scenarios that require frequent pipeline replacement.

[0045] In other embodiments, please refer to Figure 9 , Figure 10 and Figure 13 The base 210 has two opposing fixed chambers 220 fixed on its inner bottom wall, and each fixed chamber 220 is provided with an elastic element 230. The base 210 has extension holes 240 on both sides that communicate with the inside of the fixed chambers 220, and the elastic element 230 extends out of the base 210 through the extension holes 240.

[0046] In other embodiments, please refer to Figure 10 and Figure 13 The elastic element 230 includes a V-shaped elastic sheet 231, which is movably engaged in the fixed chamber 220 and has a protrusion 232 on it. One end of the protrusion 232 away from the elastic sheet 231 moves through the extension hole 240, and its diameter is adapted to the width of the embedding groove 111, and its length exposed outside the base 210 is adapted to the length of the embedding groove 111.

[0047] When installing the controller 200, the operator first inserts the oil inlet pipe 252 into the oil tank 100 along the oil outlet 130, and then places the controller 200 into the mounting slot 110. At this point, pressing down on the controller causes the protrusions 232 on both sides of the base 210 to contact and compress against the inner wall of the mounting slot 110, forcing the elastic plate 231 in the fixed chamber 220 to deform. The protrusions 232 then retract into the extension hole 240. When the protrusions 232 move to the position of the embedding slot 111, the compressive force on the inner wall of the mounting slot disappears, the elastic plate 231 returns to its original shape and releases its elastic potential energy, pushing the protrusions 232 into the embedding slot 111, simultaneously producing a crisp sound to indicate that the controller 200 is installed correctly.

[0048] The entire installation process requires no screws, making it simple and efficient. During disassembly, workers only need to insert a small tool such as a screwdriver into the recess 111 and push the protrusion 232 towards the extension hole 240 to disengage it from the recess, thus easily removing the controller 200. This significantly improves the ease of disassembly and assembly. At the same time, after the protrusion 232 is inserted into the recess 111, the elastic plate 231 generates a continuous rebound force due to deformation, always applying an outward pushing force to the protrusion 232, making the protrusion 232 fit tightly against the inner wall of the recess 111, forming a self-tightening fixation. In vibration or impact environments, the deformation of the elastic plate 231 can buffer external forces, preventing gaps from being generated between the protrusion 232 and the recess 111 due to rigid collision, ensuring a stable connection and solving the problems of traditional threaded connections lacking active pre-tightening force and being prone to loosening due to external forces.

[0049] In other embodiments (not shown in the figures), in this embodiment, the elastic element 230 uses a "spring-locking pin" combination instead of the elastic sheet 231. Specifically, a compression spring is provided in the fixing chamber 220 of the base 210, one end of the locking pin is connected to the spring, and the other end extends out of the base through the extension hole 240; the inner wall of the embedding groove 111 is provided with an annular groove adapted to the locking pin. During installation, the locking pin is compressed by the inner wall of the mounting groove 110, compressing the spring and contracting. When it reaches the position of the embedding groove 111, the spring resets and pushes the locking pin into the annular groove, forming a circumferential limit; during disassembly, pressing the button at the end of the locking pin compresses the spring and causes the locking pin to disengage from the groove; the linear deformation characteristics of the spring can provide a more uniform preload, and the annular groove combined with the circumferential limit of the locking pin can further improve the torsional resistance, making it suitable for scenarios that require frequent disassembly and assembly and have higher stability requirements.

[0050] In this embodiment, please refer to Figure 6 and Figure 14 A handle 140 is fixedly installed on the top of the fuel tank 100, and a protective cover 150 is hinged to the side facing the mounting groove 110. The protective cover 150 can rotate around the hinge point with the handle 140. When it rotates to fit against the top of the fuel tank 100, it can completely cover the top of the controller 200, thereby achieving the protection and waterproof function of the controller 200.

[0051] In other embodiments, please refer to Figure 6 and Figure 7 The protective cover 150 consists of a flat end 151 and an extended end 152, which are L-shaped. A groove 153 is provided in the middle of the extended end 152, and the side of the groove 153 facing away from the flat end 151 extends to the outside. When the flat end 151 is in contact with the top of the oil tank 100, the threaded connector 251 extends into the groove 153. The L-shaped split design of the protective cover 150 allows it to cover the top of the controller 200 through the flat end 151 and wrap the threaded connector 251 through the extended end 152, forming a three-dimensional protection of "top + side". At the same time, the through design of the groove 153 allows the threaded connector 251 to extend naturally, which avoids squeezing or blocking the threaded connector 251 when the protective cover 150 is closed.

[0052] In other embodiments, please refer to Figure 6 and Figure 7 The groove 153 extends outward to form a protrusion 154, the length of which is flush with the threaded connector 251. Mounting holes are symmetrically formed on both sides of the protrusion 154, below the threaded connector 251. A connecting ring 156 is fixed to the surface of the oil tank 100 at a position corresponding to the inner side of the protrusion 154. When the flat end 151 is in contact with the top of the oil tank 100, the center of the mounting hole is exactly on the same plane as the center of the connecting ring 156, and a combination lock 157 is movably inserted between their centers. The combination lock 157 and the raised strip 154 ​​are designed to be the same length as the threaded connector 251, which can further wrap around the connection part from both sides. Together with the slide groove 153, they form a semi-enclosed space, reducing the path of dust and liquid intrusion from the side and enhancing the three-dimensional protection of the threaded connector. Through the cooperation of the mounting hole, connecting ring and combination lock, the mechanical locking function of the protective cover is realized, which can effectively prevent unauthorized personnel from opening the protective cover, touching or disassembling the controller and connecting parts, reducing the risk of equipment damage or oil leakage caused by human operation.

[0053] In other embodiments (not shown in the figures), a permanent magnet is installed inside the protrusion 154 of the protective cover 150, and the connecting ring 156 at the corresponding position of the oil tank 100 is made of ferromagnetic material; a silicone sealing ring is provided at the contact point between the flat end 151 and the top of the oil tank 100. When the protective cover 150 is closed, the permanent magnet and the connecting ring 156 are attracted and fixed, and the silicone ring is compressed to form a seal; when opening, only a pulling force greater than the magnetic attraction force needs to be applied; quick locking can be achieved without additional locks, the magnetic design reduces mechanical wear, and the silicone ring enhances waterproof and dustproof performance, making it suitable for home scenarios where ease of operation is required.

[0054] In this embodiment, please refer to Figure 1 and Figure 2The oil gun 400 is equipped with an oil supply pipe 410. The end of the oil supply pipe 410 away from the oil gun 400 is connected to the threaded connector 251 by a threaded connection. The oil supply pipe 410 and the threaded connector 251 can be connected or disconnected by rotating without special tools, which makes it easy for staff to quickly replace the oil supply pipe 410 or maintain the connection.

[0055] In other embodiments, an mounting plate 500 is fixedly provided on the side of the oil tank 100, and multiple slots 510 are provided on the mounting plate. When the oil pipe 410 is too long, it can be inserted into the slot 510 to limit and fix the oil pipe 410. By fixing the excessively long oil pipe 410 through the slots 510, the pipeline can be prevented from being dragged, hanging or tangled at will, reducing the occupation of the space around the oil tank, making the overall layout of the equipment more regular and improving the cleanliness of the operating environment. At the same time, after the oil pipe 410 is fixed, it can avoid collision and wear with other parts due to shaking and friction, reduce the risk of oil leakage caused by damage to the outer sheath of the pipeline, and also prevent personnel from tripping over the excessively long pipeline, thus improving operational safety.

[0056] In other embodiments (not shown in the figure), a rubber pad is fixed to the inner wall of the slot 510. The rubber pad has elastic deformation characteristics and can adjust the effective space inside the slot 510 by squeezing, so that the same slot 510 can stably accommodate oil pipes 410 of different diameters (such as pipe diameter changes due to model changes or specification differences). There is no need to design a separate slot 510 to adapt to different pipelines, reducing the types of components and reducing equipment manufacturing costs. At the same time, the rubber pad is soft and can avoid direct contact and friction between the oil pipe 410 and the inner wall of the slot 510 (usually a hard material), reducing scratches and wear on the outer skin of the pipeline caused by long-term clamping, preventing oil leakage or accelerated aging of the pipeline due to damage to the outer skin, and extending the service life of the oil pipe.

[0057] In other embodiments (not shown in the figures), the slot 510 on the mounting plate 500 is replaced with a "rotatable snap-fit ​​assembly": the snap-fit ​​consists of a fixed base and a rotatable arc-shaped clamping plate, the inner side of which is provided with anti-slip texture, and the spacing between the clamping plates is adjusted by a knob. The oil pipe 410 can be clamped and fixed by rotating the knob, and it can adapt to a wider range of diameters; compared with the slot, the clamping force can be actively adjusted to avoid the pipeline slipping due to being too loose or the outer skin being damaged due to being too tight, and it is suitable for temporary fixing of oil pipes of various specifications.

[0058] In this embodiment, please refer to Figure 3 and Figure 5An oil tank inlet 160 is fixedly installed on the top of the oil tank 100, serving as the main channel for oil input. The oil tank cover 161 is threaded onto the outer wall of the oil tank inlet 160, achieving initial sealing of the oil inlet port. The oil tank cover 161 has a through opening in its center, and its inner wall is integrally formed with a vent valve 162, which has a vent hole. A threaded rod 164 is screwed into the inner wall of the vent hole, forming an axially adjustable sealing structure. When the operator needs to extract oil from the oil tank 100, simply rotating the threaded rod 164 upwards releases the seal on the vent hole. During oil extraction, the reduction of oil inside the oil tank 100 creates a negative pressure, allowing air to enter the oil tank 100 through the vent hole, thus balancing the pressure inside and outside the oil tank 100 and ensuring a continuous and stable oil extraction process.

[0059] In other embodiments (not shown in the figure), a filter screen is fixedly installed on the inner wall of the oil tank filling port 160. During the storage and transportation of oil, impurities such as dust, metal fragments, and fibers may be mixed in. The filter screen can directly intercept these particles and prevent them from entering the oil tank 100 with the oil. At the same time, when air enters the oil tank from the vent valve 162, the filter screen can intercept the dust in the air and prevent the oil from being contaminated by dust.

[0060] In other embodiments (not shown in the figures), the filter screen of the fuel tank filler port 160 adopts a drawer-type design. The inner wall of the fuel tank filler port 160 is equipped with a slide rail, and a slider is fixed to the edge of the filter screen. The slider slides in conjunction with the slide rail, and a handle is provided on the outer side of the filter screen for easy pulling. When cleaning is required, the filter screen can be directly pulled out for rinsing without disassembling the fuel tank filler port 160. This solves the problem of difficult-to-clean impurities accumulating after long-term use of a fixed filter screen, improving maintenance convenience, and is especially suitable for scenarios requiring frequent fuel refills.

[0061] In other embodiments, please refer to Figure 14 and Figure 15 A gasket 170 is fitted onto the oil tank filling port 160. A retaining sleeve 171 is integrally formed on the gasket 170. The oil gun 400 can be movably locked into the retaining sleeve 171 to fix the oil gun. The retaining sleeve 171 provides a dedicated fixing position for the oil gun 400, avoiding the oil gun 400 being placed randomly after refueling, which may cause damage to the nozzle or cause oil stains on the ground and slips due to residual oil dripping from the nozzle. This makes the work site cleaner and more orderly and improves operational safety.

[0062] In other embodiments, please refer to Figure 15A portion of the gasket 170 protrudes upward to form a spring 172, and multiple inclined teeth 163 are fixed on the bottom surface of the fuel tank cap 161. When the fuel tank cap 161 is screwed onto the fuel tank inlet 160, the inclined teeth 163 on the bottom surface can slide along the inclined surface of the spring 172. When the operator needs to remove the fuel tank cap 161, the spring 172 will form a reverse limit on the inclined teeth 163. At this time, the spring 172 needs to be pressed to release the limit, so that the inclined teeth 163 can pass smoothly through the spring 172, thereby completing the removal of the fuel tank cap 161. The cooperation between the spring 172 and the inclined teeth 163 forms a "one-way locking" structure. When removing the fuel tank cap 161, the spring 172 needs to be pressed actively to release the limit, preventing unauthorized personnel (such as operators who accidentally touch it or children) from unscrewing the fuel tank cap 161 at will, preventing accidental leakage of oil or contamination of the inside of the fuel tank 100, and adding a "protective lock" to the sealing of the fuel tank 100.

[0063] In this embodiment, please refer to Figure 1 and Figure 16 The base 300 is equipped with casters 310 around its bottom surface and a pull rod 320 on one side. Both ends of the base 300 and the pull rod 320, which are on the same plane, are equipped with paddles 330. The paddles 330 are elastic and each paddle 330 has a placement hole 340. The oil tank 100 is fixed with placement blocks 180 at both ends, and their positions and dimensions are adapted to the placement holes of the paddles 330. When the fuel tank 100 is placed on the base 300, the placement block 180 will snap into the placement hole 340 of the lever 330, quickly securing the fuel tank 100. To separate the two, the operator only needs to move the lever 330 to disengage the placement block 180 from the placement hole 340. The base 300 is equipped with casters 310 and a pull rod 320, forming a "trolley" structure that can be easily pushed or pulled to move the entire unit, solving the problem of inconvenient handling of the fuel tank 100. It is especially suitable for scenarios that require frequent changes in work location (such as outdoor work or warehouse turnover), significantly reducing manual handling costs. At the same time, the fixing is achieved by "the placement block 180 snapping into the placement hole 340," and installation can be completed simply by placing the fuel tank 100 in place. When separating, only the lever 330 needs to be moved. No screws, clips, or other auxiliary tools are required throughout the process. The operation steps are simple, and a single person can complete the task quickly, significantly improving disassembly and assembly efficiency and saving work time.

[0064] In other embodiments, please refer to Figure 16One of the levers 330 is equipped with a pedal 350. Operators can deform the lever 330 and separate the placement block 180 from the placement hole 340 simply by stepping on the pedal 350, eliminating the need for manual lever operation. When operators are moving the fuel tank 100 or simultaneously using other tools, their hands may be occupied. Stepping on the pedal 350 avoids the cumbersome process of "putting down the tool, manually shifting the lever 330, and then picking up the tool again," allowing for direct separation via foot movement. This is particularly suitable for scenarios requiring continuous operation (such as outdoor refueling or equipment maintenance), reducing operational interruptions. Furthermore, if the lever 330 has significant elasticity due to long-term use or design requirements, manual operation may require continuous force, easily leading to hand fatigue. However, foot muscles are stronger, and stepping on the pedal 350 can easily deform the lever 330 through leverage, making it especially suitable for scenarios involving frequent disassembly and assembly of the fuel tank 100, reducing the physical exertion of operators.

[0065] In other embodiments (not shown in the figures), the casters 310 of the base 300 are equipped with a foot-operated braking device: brake pads are provided at the rim of the casters 310, and the foot pedal is connected to the brake pads via a linkage. When the foot pedal is pressed, the brake pads engage with the rim to achieve braking, and return to their original position when the pedal is lifted. Meanwhile, the pull rod 320 adopts a telescopic design, with the extension length adjustable within the range of 50-100cm; this increases the stability of the base 300 when stationary, preventing slippage caused by external forces; the telescopic pull rod is adaptable to operators of different heights, improving handling comfort.

[0066] In this embodiment, please refer to Figure 2 The fuel tank 100 is equipped with a mesh bag structure 600 for storing the disassembled fuel nozzle 400 and fuel hose 410. If the fuel nozzle 400 and fuel hose 410 are left lying around after disassembly, problems such as tangled hoses, nozzles hitting the ground, or oil stains may occur, and there is even a risk of tripping over personnel and causing safety accidents. The mesh bag structure 600 provides a dedicated storage space to keep both items organized, maintain a clean work area, and reduce the risk of accidents caused by scattered items.

[0067] In other embodiments (not shown in the figures), the net structure 600 and the oil tank 100 can be detachably installed by bolts, or they can be installed by other means such as snaps or magnetic adsorption.

[0068] In other embodiments (not shown in the figures), the mesh structure 600 has a longitudinal partition inside, dividing it into an area for placing the oil gun 400 and an area for storing pipelines. The bottom of the mesh structure 600 is connected to the oil tank 100 via a slide rail, allowing it to be pulled horizontally along the side of the oil tank. The pipeline storage area has built-in winding posts, allowing the oil pipe 410 to be wound around the posts to avoid tangling. The layered design enables the classified storage of the oil gun 400 and pipelines, the slide rail structure facilitates retrieval, and the winding posts further optimize pipeline organization efficiency and reduce storage space occupation.

[0069] In summary, as can be seen from the above description, this utility model achieves the following technical effects: The snap-fit ​​structure of the elastic plate 231, the protrusion 232, and the embedded groove 111 replaces the traditional screw or threaded fixing method, allowing for quick installation and disassembly of the controller 200 without tools. This solves the problem of high cost associated with existing fixing methods. Simultaneously, it avoids the cumbersome operation caused by frequent screwdriver use, significantly improving assembly efficiency and structural stability during long-term use. After the protrusion 232 is snapped into the embedded groove 111, the elastic plate 231 generates a continuous rebound force due to deformation, constantly applying an outward pushing force to the protrusion 232, ensuring a tight fit between the protrusion 232 and the inner wall of the embedded groove 111, forming a self-tightening fixation. In vibration or impact environments, the deformation of the elastic plate 231 can buffer external forces, preventing gaps from arising between the protrusion 232 and the embedded groove 111 due to rigid collisions, ensuring a stable connection state, and solving the problems of traditional threaded connections lacking active pre-tightening force and being prone to loosening due to external forces.

[0070] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0071] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0072] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0073] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flexible snap-fit ​​oil supply device, comprising: The fuel tank is provided with a mounting part, and the mounting part has at least one embedding groove. and The controller is installed in the mounting section and includes a base and at least one flexible snap-fit ​​unit; The elastic snap-fit ​​unit includes an elastic element and a protrusion driven by the elastic element. The controller is detachably fixed to the mounting part by snapping the protrusion into the embedding groove. After the protrusion is snapped into the embedding groove, the elastic element generates a continuous rebound force, so that the protrusion and the embedding groove are kept in close contact, thus achieving self-tightening fixation.

2. The elastic snap-type oil supply device according to claim 1, characterized by The inner bottom wall of the base has two opposing fixed chambers, and the elastic element is located inside the fixed chamber; and The base has extension holes on both sides that communicate with the fixed chamber, and the protrusions are inserted into the extension holes and connected to the elastic element.

3. The elastic snap-type oil supply device according to claim 2, characterized by The elastic element includes a V-shaped elastic sheet, which is movably engaged within the fixed chamber.

4. The elastic snap-type oil supply device according to claim 1, wherein A connecting pipe is fixed at the bottom of the base. One end of the connecting pipe is equipped with a threaded connector, and the other end is equipped with an oil outlet pipe. The oil outlet pipe is compatible with the oil outlet and can be inserted into the oil tank.

5. The elastic snap-type oil supply device according to claim 4, wherein The connecting pipe has an L-shaped structure, with one end of the oil outlet pipe fixedly connected to the connecting pipe; a first groove is provided on the inner wall of the oil outlet pipe, and a first sealing ring is fixed in the groove, with the first sealing ring in close contact with the outer wall of the connecting pipe; a second groove is provided on the outer surface of the connecting pipe, and a second sealing ring is fixed in the groove, with the second sealing ring in close contact with the inner wall of the oil outlet.

6. The elastic snap-type oil supply device according to claim 4, wherein A handle is fixed to the top of the fuel tank, and a protective cover is hinged to the side of the handle facing the mounting part; the protective cover can be rotated to fit snugly against the top of the fuel tank and completely cover the top of the controller.

7. The elastic snap-type oil supply device according to claim 6, wherein The protective cover includes a flat end and an extended end, which are arranged in an L-shape. A groove is provided in the middle of the extended end, and the side of the groove opposite to the flat end extends to the outside. When the flat end is in contact with the top of the oil tank, the threaded connector extends into the groove.

8. The elastic snap-type oil supply device according to claim 7, wherein The groove edge extends outward to form a convex strip, the length of which is flush with the threaded connector. Mounting holes are symmetrically opened on both sides of the convex strip, below the threaded connector. A connecting ring is fixed on the surface of the oil tank at the position corresponding to the inner side of the convex strip. When the flat end is in contact with the top of the oil tank, the mounting hole and the center of the connecting ring are on the same plane, and multiple mounting holes and connecting rings are movably connected with a combination lock.

9. The elastic snap-type oil supply device according to claim 4, wherein It also includes an oil gun, which is equipped with an oil delivery pipe and is connected to a threaded connector through the oil delivery pipe.

10. The elastic snap-type oil supply device according to claim 9, wherein An oil inlet pipe is fixed to the top of the oil tank. An oil tank cover is threaded onto the outer wall of the oil inlet pipe. A through opening is provided in the center of the oil tank cover. A vent valve is integrally formed on the inner wall of the opening. A threaded rod is threaded onto the inner wall of the vent valve.

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