Simple electric fuel pump

Abstract

A simple electric fuel pump comprises an oil storage barrel, a pump core, a filter and a mounting frame, the mounting frame is provided with a mounting cylinder used for mounting the pump core and a mounting hole used for mounting the filter, the mounting cylinder is connected with the mounting frame through a connecting strip arranged on the outer wall of the mounting cylinder, and a clamping strip is arranged at the top of the mounting cylinder and clamped to the outer ring of the top of the pump core. The pump core is inserted from top to bottom to complete top positioning and fixing, reinforcing ribs and fixing strips are arranged on the outer wall of the filter, clamping grooves are formed in the fixing strips, the clamping grooves in every two adjacent fixing strips are arranged in a staggered mode, a clamping gap is formed between every two adjacent clamping grooves, and a plurality of connecting plates are arranged on the lower side of the mounting hole of the mounting frame. The end portion of the lower end of the connecting plate extends inwards to be provided with a clamping plate clamped in the clamping gap, a plurality of angle plates are evenly arranged between the clamping plate and the connecting plate, rapid clamping installation of the filter is achieved, the angle plates can be tightly attached to the side edges of the fixing strips, and the freedom degree of circumferential rotation of the filter is effectively limited.

Description

Technical Field

[0001] This utility model relates to a fuel pump, and more particularly to a simple electric fuel pump. Background Technology

[0002] The electric fuel pump is a core component of a vehicle's fuel supply system. Its function is to draw fuel from the fuel tank and deliver it to the engine under pressure. Traditional electric fuel pumps typically consist of a reservoir, pump element, filter, and mounting brackets to secure these components. Currently, most fuel pumps on the market use screws or complex snap-fit ​​connections between the pump element and the mounting bracket, resulting in cumbersome assembly steps, low production efficiency, and the need for specialized tools during maintenance, making disassembly inconvenient. The inlet filter at the bottom of the pump element is usually a separate component, not securely fixed, and prone to displacement or detachment under long-term vehicle vibration, affecting filtration efficiency and pump element lifespan. The filter is simply secured within the reservoir, usually relying on a single snap-fit ​​structure at the top or bottom. While this structure provides adequate axial fixation, it lacks circumferential restraint, allowing the filter to rotate or wobble under fuel impact and vehicle vibration, potentially loosening connected fuel line joints, creating a risk of leakage, and also generating noise. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a simple electric fuel pump that is easy to install, has a stable connection, a simple structure, and low production cost.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a simple electric fuel pump, including an oil storage tank, a pump core, and a filter. The pump core and the filter are set in the inner cavity of the oil storage tank by a mounting bracket. The mounting bracket is provided with a mounting cylinder for installing the pump core and a mounting hole for installing the filter. The mounting cylinder is connected to the mounting bracket by a connecting strip on its outer wall. The top of the mounting cylinder is provided with a retaining strip, which is engaged with the top outer ring of the pump core. The outer wall of the filter is provided with several reinforcing ribs along its axial direction. Several fixing strips are provided between two adjacent reinforcing ribs along its axial direction. Each fixing strip is provided with a retaining groove. The retaining grooves on two adjacent fixing strips are staggered and form a retaining gap between them. The mounting bracket is provided with several connecting plates on the lower side of the mounting hole. The lower end of the connecting plate extends inward and is provided with a retaining plate that engages in the retaining gap. Several corner plates are evenly provided between the retaining plate and the connecting plate.

[0005] With the above structure, by setting an installation cylinder with a top retaining strip, the pump core can be positioned and fixed by simply inserting it from top to bottom during assembly, achieving true "one-click" installation. This greatly improves assembly efficiency and facilitates subsequent pump core replacement and maintenance. It is suitable for use with pump cores of different specifications. The interlocking gap formed by the staggered fixing strips on the outer wall of the filter, in conjunction with the interlocking plate at the bottom of the mounting bracket, enables quick interlocking installation of the filter. The corner plate set between the interlocking plate and the connecting plate can fit tightly against the side of the fixing strip after the interlocking plate is inserted into the interlocking gap, effectively restricting the freedom of circumferential rotation of the filter, ensuring the absolute stability of the filter in the oil tank, and avoiding the risk of abnormal noise caused by vibration and loosening of the connecting pipe.

[0006] Preferably, the upper end of the oil storage tank has several snap-fit ​​holes, and the side wall of the mounting bracket has several snap-fit ​​blocks that engage with these holes. This structure eliminates the need for traditional threaded connections, making assembly and disassembly convenient.

[0007] Preferably, the pump core has a pump outlet pipe and a pump inlet pipe on its upper and lower sides, respectively. The bottom of the mounting cylinder has a mounting port with a filter screen. The filter screen has a filter screen frame and a limiting block. The filter screen passes through the mounting port and is fitted onto the pump inlet pipe via the filter screen frame. The bottom of the pump core has a limiting post that matches the limiting block. This structure, through the insertion and engagement of the limiting post and the limiting block on the filter screen, not only achieves precise positioning and fixation of the filter screen, effectively preventing its circumferential rotation and axial movement, but also indirectly enhances the stability of the lower part of the pump core, keeping the pump core stable within the entire mounting cylinder and improving its vibration resistance.

[0008] Preferably, the filter is provided with an input pipe and an output pipe, and the input pipe is connected to the pump outlet pipe of the pump core through an oil supply pipe.

[0009] Preferably, the input pipe is provided with an oil return port, the oil return port is provided with an oil return pipe, and the other end of the oil return pipe extends through the mounting bracket to the inner cavity of the oil storage tank.

[0010] Preferably, the input pipe is equipped with a pressure valve.

[0011] This utility model, through its ingenious snap-fit ​​and limiting structure design, greatly simplifies the assembly process and reduces manufacturing costs, while comprehensively improving the connection rigidity and stability of core components such as pump cores and filters in the working state. The overall layout is reasonable, and the modular design allows pump cores and filters to be pre-assembled and replaced as independent modules, which facilitates production organization and later maintenance. It has high practical value and market prospects. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the present utility model;

[0014] Figure 3 This is a structural diagram of the mounting bracket and filter of this utility model.

[0015] Figure 4 This is a structural schematic diagram of the mounting bracket of this utility model;

[0016] Figure 5 This is a schematic diagram of the installation of the filter screen of this utility model.

[0017] In the diagram: 1. Oil storage tank; 2. Pump core; 3. Filter; 4. Mounting bracket; 5. Mounting cylinder; 6. Mounting hole; 7. Connecting strip; 8. Clip strip; 9. Reinforcing rib; 10. Fixing strip; 11. Slot; 12. Clip gap; 13. Connecting plate; 14. Clip plate; 15. Angle plate; 16. Buckle hole; 17. Buckle block; 18. Pump outlet pipe; 19. Pump inlet pipe; 20. Mounting port; 21. Filter screen; 22. Filter screen frame; 23. Limiting block; 24. Limiting post; 25. Input pipe; 26. Output pipe; 27. Oil delivery pipe; 28. Oil return port; 29. ​​Oil return pipe; 30. Pressure valve. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0019] Example: Figures 1 to 5 The illustration shows a simple electric fuel pump, including a fuel tank 1, a pump core 2, and a filter 3. The pump core 2 and the filter 3 are mounted in the inner cavity of the fuel tank 1 via a mounting bracket 4. The upper end of the fuel tank 1 is provided with several snap holes 16. The side wall of the mounting bracket 4 is provided with several snap blocks 17 that snap into the snap holes 16, eliminating the need for traditional threaded connections and making assembly and disassembly convenient. The mounting bracket 4 is provided with a mounting cylinder 5 for mounting the pump core 2 and a mounting hole 6 for mounting the filter 3.

[0020] The mounting cylinder 5 is connected to the mounting frame 4 via a connecting strip 7 on its outer wall. The top of the mounting cylinder 5 is provided with a retaining strip 8, which is engaged with the top outer ring of the pump core 2. By setting the mounting cylinder 5 with the top retaining strip 8, the pump core 2 can be positioned and fixed at the top simply by inserting it from top to bottom during assembly, realizing a true "one-click" installation, greatly improving assembly efficiency, and facilitating subsequent replacement and maintenance of the pump core 2. It is suitable for use with pump cores 2 of different specifications. The pump core 2 is provided with a pump outlet pipe 18 and a pump inlet pipe 19 on its upper and lower sides, respectively. The bottom of the mounting cylinder 5 is provided with a mounting port 20, and a filter screen 21 is provided on the mounting port 20. The filter screen 21 is provided with a filter screen frame 22 and a limiting block 23. The filter screen 21 passes through the mounting port 20 and is fitted onto the pump inlet pipe 19. The bottom of the pump core 2 is provided with a limiting post 24 that matches the limiting block 23. By interlocking the limiting post 24 with the limiting block 23 on the filter screen 21, not only is the precise positioning and fixing of the filter screen 21 achieved, effectively preventing its circumferential rotation and axial movement, but it also indirectly enhances the stability of the lower part of the pump core 2, making the pump core 2 stable within the entire mounting cylinder 5 and improving its vibration resistance.

[0021] The outer wall of the filter 3 is provided with several reinforcing ribs 9 along its axial direction. Between two adjacent reinforcing ribs 9, several fixing strips 10 are provided along their axial direction. Each fixing strip 10 has a slot 11. The slots 11 on adjacent fixing strips 10 are staggered and form a locking gap 12. The mounting frame 4 is provided with several connecting plates 13 below the mounting holes 6. The lower end of each connecting plate 13 extends inward to provide a locking plate 14 that engages within the locking gap 12. Several angle plates 15 are evenly distributed between the locking plate 14 and the connecting plate 13. By utilizing the locking gap 12 formed by the staggered fixing strips 10 on the outer wall of the filter 3, and cooperating with the locking plate 14 at the lower part of the mounting frame 4, the filter 3 achieves rapid... The quick-connect installation uses a corner plate 15 between the snap-fit ​​plate 14 and the connecting plate 13. After the snap-fit ​​plate 14 is inserted into the snap-fit ​​gap 12, the corner plate 15 can fit tightly against the side of the fixing strip 10, effectively restricting the freedom of rotation of the filter 3 in the circumference, ensuring the absolute stability of the filter 3 in the oil storage tank 1, and avoiding the risk of abnormal noise caused by vibration and loosening of the connecting pipe. The filter 3 is provided with an input pipe 25 and an output pipe 26. The input pipe 25 is connected to the pump outlet pipe 18 of the pump core 2 through the oil delivery pipe 27. The input pipe 25 is provided with an oil return port 28. The oil return port 28 is provided with an oil return pipe 29. The other end of the oil return pipe 29 passes through the mounting bracket 4 and extends to the inner cavity of the oil storage tank 1. The input pipe 25 is provided with a pressure valve 30.

[0022] This utility model, through its ingenious snap-fit ​​and limiting structure design, greatly simplifies the assembly process and reduces manufacturing costs, while comprehensively improving the connection rigidity and stability of core components such as pump core 2 and filter 3 in the working state. The overall layout is reasonable and the modular design allows pump core 2 and filter 3 to be pre-assembled and replaced as independent modules, which facilitates production organization and later maintenance, and has high practical value and market prospects.

[0023] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A simple electric fuel pump, comprising a fuel tank (1), a pump core (2), and a filter (3), wherein the pump core (2) and the filter (3) are mounted in the inner cavity of the fuel tank (1) via a mounting bracket (4), characterized in that: The mounting frame (4) is provided with a mounting cylinder (5) for mounting the pump core (2) and a mounting hole (6) for mounting the filter (3). The mounting cylinder (5) is connected to the mounting frame (4) through a connecting strip (7) on its outer wall. The top of the mounting cylinder (5) is provided with a retaining strip (8), which is engaged with the top outer ring of the pump core (2). The outer wall of the filter (3) is provided with several reinforcing ribs (9) along its axial direction. Several reinforcing strips are provided between two adjacent reinforcing ribs (9) along its axial direction. The fixing strip (10) is provided with a slot (11). The slots (11) on two adjacent fixing strips (10) are staggered and form a snap-fit ​​gap (12) between them. The mounting bracket (4) is provided with several connecting plates (13) on the lower side of the mounting hole (6). The lower end of the connecting plate (13) extends inward and is provided with a snap-fit ​​plate (14) that snaps into the snap-fit ​​gap (12). Several corner plates (15) are evenly provided between the snap-fit ​​plate (14) and the connecting plate (13).

2. The simplified electric fuel pump according to claim 1, characterized in that: The oil storage tank (1) has several buckle holes (16) at its upper end, and the mounting bracket (4) has several buckle blocks (17) that are fastened to the buckle holes (16) on its side wall.

3. The simplified electric fuel pump according to claim 1, characterized in that: The pump core (2) is provided with a pump outlet pipe (18) and a pump inlet pipe (19) on its upper and lower sides respectively. The bottom of the mounting cylinder (5) is provided with a mounting port (20). A filter screen (21) is provided on the mounting port (20). A filter screen frame (22) and a limiting block (23) are provided on the filter screen (21). The filter screen (21) passes through the mounting port (20) and is fitted onto the pump inlet pipe (19). The bottom of the pump core (2) is provided with a limiting post (24) that matches the limiting block (23).

4. The simplified electric fuel pump according to claim 3, characterized in that: The filter (3) is provided with an input pipe (25) and an output pipe (26). The input pipe (25) is connected to the pump outlet pipe (18) of the pump core (2) through the oil supply pipe (27).

5. The simplified electric fuel pump according to claim 4, characterized in that: The input pipe (25) is provided with an oil return port (28), and the oil return port (28) is provided with an oil return pipe (29). The other end of the oil return pipe (29) extends through the mounting bracket (4) to the inner cavity of the oil storage tank (1).

6. The simplified electric fuel pump according to claim 4, characterized in that: A pressure valve (30) is provided on the input pipe (25).

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