Fuel supply device

1 . A fuel supply device, comprising:

a fuel tank provided with at least one recessed groove; and

a controller comprising a base, an elastic element and a boss driven by the elastic element;

wherein the controller is detachably fixed to the fuel tank by snapping the boss into the recessed groove, and the elastic element generates a continuous resilience force after the boss is snapped into the recessed groove, ensuring tight contact between the boss and the recessed groove to achieve self-tightening fixation.

2 . The fuel supply device according to claim 1 , wherein an inner bottom wall of the base is fixed with two oppositely arranged fixed chambers, and the elastic element is arranged within the fixed chamber; and

extended holes communicating with the fixed chambers are arranged on both sides of the base, and the boss is inserted into the extended hole and connected to the elastic element.

3 . The fuel supply device according to claim 2 , wherein the elastic element comprises a V-shaped elastic sheet, and the elastic sheet is movably engaged within the fixed chamber.

4 . The fuel supply device according to claim 1 , wherein a connecting pipe is fixed at a bottom of the base, one end of the connecting pipe is provided with a threaded connector, and the other end is provided with an outlet pipe that is adapted to an outlet port and is capable of being inserted into the fuel tank.

5 . The fuel supply device according to claim 4 , wherein the connecting pipe has an L-shaped structure, and one end of the outlet pipe is fixedly connected to the connecting pipe;

a first recess is formed on an inner wall of the outlet pipe, and a first sealing ring is fixed inside the first recess and in a tight contact with an outer wall of the connecting pipe; and

a second recess is formed on an outer surface of the connecting pipe, and a second sealing ring is fixed inside the second recess and is in tight contact with an inner wall of the outlet port.

6 . The fuel supply device according to claim 4 , wherein a handle is fixed on a top of the fuel tank, and a protective cover is hinged on a side of the handle; and the protective cover is rotatable to fit the top of the fuel tank and completely cover a top of the controller.

7 . The fuel supply device according to claim 6 , wherein the protective cover comprises a flat end and an extended end arranged in an L-shape;

a slide groove is formed in a middle portion of the extended end, with one side of the slide groove facing away from the flat end open to the outside; and

when the flat end is fitted to the top of the fuel tank, the threaded connector extends into the slide groove.

8 . The fuel supply device according to claim 7 , wherein an edge of the slide groove extends outward to form a rib, with a length of the rib flush with the threaded connector, and mounting holes are symmetrically arranged on both sides of the rib below the threaded connector;

a connecting ring is fixed at a position on a surface of the fuel tank corresponding to an inner side of the rib, and when the flat end is fitted to the top of the fuel tank, the mounting holes lie on a same plane as the center of the connecting ring, with a combination lock movably inserted between the mounting holes and the connecting ring.

9 . The fuel supply device according to claim 4 , further comprising a fuel nozzle, wherein the fuel nozzle is equipped with an oil delivery pipe and connected to the threaded connector through the oil delivery pipe.

10 . The fuel supply device according to claim 9 , wherein an inlet pipe is fixed on the top of the fuel tank, and a tank cap is threadedly installed on an outer wall of the inlet pipe; and

a through opening is formed at the center of the tank cap, a vent valve is integrally molded on an inner wall of the opening, and a screw rod is threadedly installed on an inner wall of the vent valve.

11 . The fuel supply device according to claim 10 , wherein a spacer is sleeved on the inlet pipe, a fitting sleeve is fixed on the spacer, and the fuel nozzle is movably engaged within the fitting sleeve.

12 . A fuel supply device, comprising:

a fuel tank provided with at least one recessed groove; and

a controller comprising a base;

wherein at least one fixed chamber is provided on an inner bottom wall of the base, and an elastic sheet is arranged inside the fixed chamber; and

extended holes are arranged on both sides of the base, and the elastic sheet is fixedly provided with a boss that movably passes through the extended holes and is partially exposed to the outside;

wherein the controller is pressed to radially retract the boss until the boss is snapped into the recessed groove, thereby completing installation, while the elastic sheet releases a resilience force after the boss is snapped into the recessed groove, driving the boss to continuously press against a side wall of the recessed groove, forming a self-locking fixation.

13 . The fuel supply device according to claim 12 , wherein a connecting pipe is fixed at a bottom of the base, one end of the connecting pipe is provided with a threaded connector, and the other end is provided with an outlet pipe that is adapted to an outlet port and is capable of being inserted into the fuel tank.

14 . The fuel supply device according to claim 13 , wherein the connecting pipe has an L-shaped structure, with one end of the inlet pipe fixedly connected to the connecting pipe;

a first recess is formed on an inner wall of the inlet pipe, and a first sealing ring is fixed in the first recess and is in tight contact with an outer wall of the connecting pipe; and

a second recess is formed on an outer surface of the connecting pipe, and a second sealing ring is fixed in the recess and is in tight contact with an inner wall of the outlet port.

15 . The fuel supply device according to claim 13 , wherein a handle is fixed on the top of the fuel tank, and a protective cover is hinged on a side of the handle; and

the protective cover is rotatable to fit the top of the fuel tank and completely cover a top of the controller.

16 . The fuel supply device according to claim 15 , wherein the protective cover comprises a flat end and an extended end arranged in an L-shape; and

a slide groove is formed in a middle portion of the extended end, with one side of the slide groove facing away from the flat end open to the outside, and when the flat end fits the top of the fuel tank, the threaded connector extends into the slide groove.

17 . The fuel supply device according to claim 16 , wherein an edge of the slide groove extends outward to form a rib, with a length of the rib flush with the threaded connector, and mounting holes are symmetrically arranged on both sides of the rib below the threaded connector;

a connecting ring is fixed at a position on a surface of the fuel tank corresponding to an inner side of the rib, and when the flat end is fitted to the top of the fuel tank, the mounting holes lie on a same plane as the center of the connecting ring, with a combination lock movably inserted between the mounting holes and the connecting ring.

18 . The fuel supply device according to claim 13 , further comprising a fuel nozzle, wherein the fuel nozzle is equipped with an oil delivery pipe and is connected to the threaded connector through the oil delivery pipe.

19 . The fuel supply device according to claim 18 , wherein an inlet pipe is fixed on the top of the fuel tank, and a tank cap is threadedly installed on an outer wall of the inlet pipe; and

a through opening is formed at the center of the tank cap, a vent valve is integrally molded on an inner wall of the opening, and a screw rod is threadedly installed on an inner wall of the vent valve.

20 . The fuel supply device according to claim 19 , wherein a spacer is sleeved on the inlet pipe, a fitting sleeve is fixed on the spacer, and the fuel nozzle is movably engaged within the fitting sleeve.