Novel fuel pump assembly with buffer structure

Abstract

A novel fuel pump assembly with a buffering structure, through the negative pressure effect generated by the injection part, the oil in the oil storage tank is sucked into the injection part, at the same time, the fuel pump body sprays high pressure oil to the buffer oil outlet through the injection part. The two kinds of oil meet in the buffer oil outlet, due to the difference in speed and mutual collision, the kinetic energy of the oil is effectively attenuated. Subsequently, the oil liquid is further slowed down and dispersed by the buffering structure in the buffer oil outlet, so that the oil liquid can smoothly return to the inside of the oil storage tank. The design of the buffering structure not only effectively reduces the impact and vibration of the oil liquid in the return process, but also significantly improves the working efficiency and stability of the fuel pump assembly. In addition, the detachable design of the remote oil suction buffering device is convenient for users to maintain and replace, further prolonging the service life of the fuel pump assembly.

Description

Technical Field

[0001] This utility model relates to the field of fuel pump technology, and specifically to a novel fuel pump assembly with a buffer structure. Background Technology

[0002] In the prior art, when the injection pump component in the fuel pump assembly performs remote fuel suction, the fuel will generate a large impact force during high-speed injection. This impact force will not only damage the components in the fuel pump assembly, but also generate a lot of noise, affecting the service life and performance of the fuel pump assembly. Summary of the Invention

[0003] In view of this, the present invention provides a novel fuel pump assembly with a buffer structure.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A novel fuel pump assembly with a buffer structure includes a fuel pump body disposed within a fuel reservoir. The fuel pump body is equipped with a detachable distal suction buffer device, which connects the fuel pump body and the interior of the fuel reservoir. The distal suction buffer device has an injection section connected to the fuel pump body, an ejector section connected to the interior of the fuel reservoir for ejection, and a buffered outlet section connected to the interior of the fuel reservoir. Fuel from the fuel reservoir and the fuel pump body enters the buffered outlet section through the ejector section and the injection section, respectively. The buffered outlet section has a buffer structure that buffers the fuel before it flows back into the fuel reservoir.

[0005] Preferably, the distal oil suction buffer device includes a first body and a second body, the ejector and the spraying part are respectively formed on the first body and the second body, and the first buffer oil outlet and the second buffer oil outlet are respectively recessed on the opposite end faces of the first body and the second body. The first buffer oil outlet and the second buffer oil outlet are symmetrically arranged. The first buffer oil outlet is connected to the ejector, and the spraying part is connected to the second buffer oil outlet. After the first body and the second body are connected, the first buffer oil outlet and the second buffer oil outlet are connected to form a buffer oil outlet.

[0006] Preferably, the buffer structure within the buffer oil outlet section includes a buffer oil passage section connecting the ejector section and the spray section, and a buffer chamber section disposed at the end of the buffer oil passage section away from the spray section, wherein the buffer chamber section has a buffer oil outlet section connecting to the inside of the oil storage tank.

[0007] Preferably, the buffer oil outlet is provided with a jet pump connecting part on the side near the jet part, the jet pump connecting part is connected to the jet part and the buffer oil passage part respectively, and the inner diameter of the buffer oil passage part gradually increases from the side near the jet part toward the buffer chamber part.

[0008] Preferably, the inner wall of the buffer oil passage and the inner wall of the buffer chamber are smoothly transitioned, the volume of the buffer chamber is larger than the volume of the buffer oil passage, the buffer oil outlet is provided along the width direction of one side inner wall of the buffer chamber, and the two opposite side inner walls of the buffer oil outlet and the top inner wall of the buffer oil outlet are flush with the two side inner walls and the top inner wall of the buffer chamber, respectively.

[0009] Preferably, the inner walls of the buffer chamber near the buffer oil outlet are recessed to form oil guide grooves. The oil guide grooves have a bottom flush with the two side walls of the buffer oil outlet and an arc-shaped surface that connects with the inner walls of the buffer chamber near the buffer oil outlet. The top inner wall of the buffer chamber is provided with an arc-shaped buffer structure.

[0010] Preferably, a snap-fit ​​element is provided between the injection unit and the fuel pump body, a pump body snap-fit ​​structure is provided on the fuel pump body, a buffer device snap-fit ​​structure is provided on the injection unit, the buffer device snap-fit ​​structure is snap-fitted to the pump body snap-fit ​​structure, and the snap-fit ​​element is provided between the buffer device snap-fit ​​structure and the pump body snap-fit ​​structure and snap-fitted and fixed to the buffer device snap-fit ​​structure and the pump body snap-fit ​​structure respectively.

[0011] Preferably, the buffer device locking structure is an annular rib protruding from the outer wall of the injection section, the injection section divides the interior of the annular rib into a first locking groove and a second locking groove, the fuel pump body has a pump body outlet communicating with the injection section, and the pump body locking structure is locking blocks provided on both sides of the pump body outlet, the locking blocks on both sides of the pump body outlet respectively extend into the first locking groove and the second locking groove and are locked together with the injection section.

[0012] Preferably, the snap-fit ​​component has two symmetrically arranged pump body snap-fit ​​claws and two symmetrically arranged spray part snap-fit ​​claws. The pump body snap-fit ​​structure has an inwardly recessed pump body snap-fit ​​groove. The pump body snap-fit ​​claws extend into the pump body snap-fit ​​groove and snap-fit ​​with the pump body snap-fit ​​structure. The spray part snap-fit ​​claws have a claw groove on one end that connects with the spray part. The spray part protrudes from the claw groove to form a limiting end. The limiting end extends into the claw groove and snaps and fixes with the spray part snap-fit ​​claws.

[0013] Preferably, the first body and the second body are fixed together by laser welding.

[0014] The beneficial effects of this invention are as follows: The negative pressure effect generated by the ejector section draws oil from the reservoir into the ejector section, while simultaneously, the fuel pump body injects high-pressure oil into the buffer outlet section through the injection section. These two types of oil meet in the buffer outlet section, and due to the velocity difference and mutual collision, the kinetic energy of the oil is effectively attenuated. Subsequently, the converging oil is further slowed down and its pressure dispersed by the buffer structure within the buffer outlet section, allowing the oil to flow smoothly back into the reservoir. This buffer structure design not only effectively reduces the impact and vibration of the oil during the return flow process but also significantly improves the working efficiency and stability of the fuel pump assembly. Furthermore, the detachable design of this remote suction buffer device facilitates maintenance and replacement by the user, further extending the service life of the fuel pump assembly. Overall, this novel fuel pump assembly with a buffer structure, through its unique design, achieves effective buffering and stable return of the oil, providing a strong guarantee for the efficient operation of the fuel system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Appendix Figure 1 This is a schematic diagram of the fuel pump assembly; Appendix Figure 2 A schematic diagram showing the connection between the fuel pump body and the remote fuel suction buffer device; Appendix Figure 3 Schematic diagram of the remote oil suction buffer device; Appendix Figure 4 For the appendix Figure 3 Another angle diagram; Appendix Figure 5 This is an exploded view of the structure of the remote oil suction buffer device. Appendix Figure 6 For the appendix Figure 2 Enlarged view of point A in the middle. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] This utility model provides the following technical solution: As attached Figure 1-6 As shown, this utility model discloses a novel fuel pump assembly with a buffer structure, including a fuel pump body 1 disposed within a fuel reservoir (not shown). The fuel pump body 1 is equipped with a detachable remote suction buffer device 3, which connects the fuel pump body 1 and the interior of the fuel reservoir. The remote suction buffer device 3 has an injection section 4 connected to the fuel pump body 1, an ejector section 5 connected to the interior of the fuel reservoir for ejection, and a buffered oil outlet section 6 connected to the interior of the fuel reservoir. The fuel in the fuel reservoir and the fuel pump body 1 enters the buffered oil outlet section 6 through the ejector section 5 and the injection section 4, respectively. The buffered oil outlet section 6 has a buffer structure 7, which buffers the fuel before it flows back into the fuel reservoir. Specifically, in this design, the negative pressure effect generated by the ejector section 5 draws the fuel in the fuel reservoir into the ejector section 5, while the fuel pump body 1 injects high-pressure fuel into the buffered oil outlet section 6 through the injection section 4. The two types of fuel meet in the buffer outlet section 6. Due to the velocity difference and mutual collision, the kinetic energy of the fuel is effectively attenuated. The converging fuel then passes through the buffer structure 7 within the buffer outlet section 6, further slowing the flow rate and dispersing the pressure, allowing the fuel to flow smoothly back into the fuel tank. This buffer structure 7 design not only effectively reduces the impact and vibration of the fuel during the return flow process but also significantly improves the working efficiency and stability of the fuel pump assembly. Furthermore, the detachable design of this remote fuel suction buffer device 3 facilitates maintenance and replacement by the user, further extending the service life of the fuel pump assembly.

[0020] Furthermore, the distal oil suction buffer device 3 includes a first body 8 and a second body 9. The ejector part 5 and the spray part 4 are respectively formed on the first body 8 and the second body 9. A first buffer oil outlet part 10 and a second buffer oil outlet part 11 are respectively recessed on the opposite end faces of the first body 8 and the second body 9. The first buffer oil outlet part 10 and the second buffer oil outlet part 11 are symmetrically arranged. The first buffer oil outlet part 10 is connected to the ejector part 5, and the spray part 4 is connected to the second buffer oil outlet part 11. After the first body 8 and the second body 9 are connected, the first buffer oil outlet part 10 and the second buffer oil outlet part 11 are connected to form a buffer oil outlet part 6. Specifically, in this embodiment, the ejector part 5 is a tubular structure protruding from the side of the first body 8 away from the second body 9. The inner wall of the tubular structure is smooth, which helps to reduce the resistance of the oil during the flow process and improve the oil suction efficiency. The injection section 4 is a nozzle structure located on the side of the second main body 9 away from the buffer oil outlet section 6. This nozzle structure can inject high-pressure oil into the second buffer oil outlet section 11, ensuring that the oil can be uniformly and quickly mixed with the oil entering from the ejector section 5. By setting the distal oil suction buffer device 3 as the structure of the first main body 8 and the second main body 9, it can be processed and assembled separately during the production process, reducing production difficulty and cost. The first buffer oil outlet section 10 on the first main body 8 and the second buffer oil outlet section 11 on the second main body 9 form the complete buffer oil outlet section 6 after being connected. This split design not only facilitates processing and assembly but also helps to improve the structural strength of the buffer oil outlet section 6.

[0021] Furthermore, the buffer structure 7 within the buffer outlet section 6 includes a buffer oil passage section 12 connecting the ejector section 5 and the injection section 4, and a buffer chamber section 13 located at the end of the buffer oil passage section 12 away from the injection section 4. The buffer chamber section 13 has a buffer outlet 14 connecting to the inside of the fuel storage tank. Specifically, in this embodiment, the buffer structure 7, composed of the buffer oil passage section 12 and the buffer chamber section 13, can effectively absorb and disperse the kinetic energy of the oil within the buffer outlet section 6. The buffer oil passage section 12 serves as a channel for oil confluence, ensuring that the oil gradually slows down and disperses pressure during flow. The buffer chamber section 13 serves as the final convergence and buffering location for the oil, with a spacious interior capable of holding a large amount of oil, and smoothly returning the oil to the fuel storage tank through the buffer outlet 14. This design of the buffer structure 7 not only further enhances the stability of the oil during the return process but also effectively improves the working efficiency and durability of the fuel pump assembly.

[0022] Furthermore, a jet pump connecting part 15 is provided on the side of the buffer oil outlet 6 near the jet section 4. The jet pump connecting part 15 connects the jet section 4 and the buffer oil passage section 12. The inner diameter of the buffer oil passage section 12 gradually increases from the side near the jet section 4 towards the buffer chamber section 13. Specifically, in this embodiment, the arrangement of the jet pump connecting part 15 allows the high-pressure oil ejected from the jet section 4 to smoothly enter the buffer oil passage section 12. Simultaneously, the design of the inner diameter of the buffer oil passage section 12, which gradually increases from the side near the jet section 4 towards the buffer chamber section 13, helps to further reduce the flow rate of the oil and disperse the pressure of the oil during flow. When the high-pressure oil enters the buffer oil passage section 12 through the jet pump connecting part 15, the flow rate of the oil gradually decreases due to the gradual increase in the inner diameter of the oil passage, and the kinetic energy is effectively attenuated. This design not only ensures smooth flow of oil within the buffer outlet 6, but also effectively avoids oil impact and vibration caused by excessive flow rate, further improving the working performance and stability of the fuel pump assembly.

[0023] Furthermore, the inner wall of the buffer oil passage 12 and the inner wall of the buffer chamber 13 have a smooth transition. The volume of the buffer chamber 13 is larger than the volume of the buffer oil passage 12. The buffer oil outlet 14 is arranged along the width direction of one side of the inner wall of the buffer chamber 13. The two opposite side inner walls and the top inner wall of the buffer oil outlet 14 are flush with the two side inner walls and the top inner wall of the buffer chamber 13, respectively. Specifically, in this embodiment, the smooth transition between the inner wall of the buffer oil passage 12 and the inner wall of the buffer chamber 13 helps to reduce eddies and turbulence in the oil flow process, thereby reducing energy loss and improving the flow efficiency of the oil. At the same time, the volume of the buffer chamber 13 is set to be larger than the volume of the buffer oil passage 12. This design allows the buffer chamber 13 to hold more oil, further enhancing its ability to buffer and stabilize the oil flow rate. The buffer outlet 14 is positioned along the width of one side of the inner wall of the buffer chamber 13. This layout helps the fuel to be evenly distributed within the buffer chamber 13, avoiding problems such as localized fuel accumulation or uneven flow rate. The opposing inner walls on both sides and the top of the buffer outlet 14 are flush with the inner walls on both sides and the top of the buffer chamber 13, respectively. This detail ensures that the fuel maintains a stable flow rate and pressure when flowing out of the buffer outlet 14, further improving the performance and stability of the fuel pump assembly.

[0024] Furthermore, the inner walls of the buffer chamber 13 near the buffer oil outlet 14 are recessed to form oil guide grooves 16. The oil guide grooves 16 have a bottom 17 flush with the side walls of the buffer oil outlet 14 and an arc-shaped surface 18 connecting with the inner walls of the buffer chamber 13 near the buffer oil outlet 14. An arc-shaped buffer structure 19 is provided on the top inner wall of the buffer chamber 13. Specifically, in this embodiment, the oil guide grooves 16 further optimize the flow path of the oil within the buffer chamber 13. When the oil gathers in the buffer chamber 13, the oil guide grooves 16 can guide the oil to flow smoothly along the bottom 17 to the buffer oil outlet 14, avoiding local accumulation or eddy currents of the oil within the buffer chamber 13. Simultaneously, the arc-shaped surface 18 of the oil guide grooves 16 allows the oil to gradually slow down during flow, further dispersing pressure and ensuring the smoothness of the oil as it flows out of the buffer oil outlet 14. In addition, the arc-shaped buffer structure 19 provided on the inner wall of the top of the buffer chamber 13 serves as the last buffer barrier before the oil flows out, effectively absorbing the remaining kinetic energy of the oil and allowing the oil to flow back into the oil storage tank through the buffer outlet 14 in a more stable state.

[0025] Furthermore, a snap-fit ​​element 20 is provided between the injection section 4 and the fuel pump body 1. The fuel pump body 1 is provided with a pump body snap-fit ​​structure 21, and the injection section 4 is provided with a buffer device snap-fit ​​structure 22. The buffer device snap-fit ​​structure 22 is snap-fitted to the pump body snap-fit ​​structure 21. The snap-fit ​​element 20 is disposed between the buffer device snap-fit ​​structure 22 and the pump body snap-fit ​​structure 21 and is snap-fitted and fixed to both. Specifically, in this embodiment, the injection section 4 and the fuel pump body 1 are securely connected through the snap-fit ​​element 20. The fuel pump body 1 is designed with a pump body snap-fit ​​structure 21, while the injection section 4 is equipped with a buffer device snap-fit ​​structure 22. These two snap-fit ​​structures are tightly connected by a snap-fit ​​mechanism, ensuring the stability and reliability of the injection section 4 during fuel pump operation. Simultaneously, the snap-fit ​​element 20, disposed between the buffer device snap-fit ​​structure 22 and the pump body snap-fit ​​structure 21, provides further fixation. This snap-fit ​​design not only simplifies the installation process but also makes it easy for users to disassemble and maintain the fuel pump assembly when needed, demonstrating the flexibility and practicality of the design.

[0026] Furthermore, the buffer device snap-fit ​​structure 22 is an annular rib protruding from the outer wall of the injection section 4. The injection section 4 divides the interior of the annular rib into a first snap-fit ​​portion 23 and a second snap-fit ​​portion 24. The fuel pump body 1 has a pump body outlet 25 communicating with the injection section 4. The pump body snap-fit ​​structure 21 consists of snap-fit ​​blocks disposed on both sides of the outlet 25. The snap-fit ​​blocks on both sides of the outlet 25 extend into the first snap-fit ​​portion 23 and the second snap-fit ​​portion 24 respectively and snap-fit ​​with the injection section 4. Specifically, in this embodiment, the buffer device snap-fit ​​structure 22 adopts an annular rib design. This structure not only enhances the structural strength of the injection section 4 but also provides a stable snap-fit ​​surface. The interior of the annular rib is divided into a first snap-fit ​​portion 23 and a second snap-fit ​​portion 24. These two snap-fit ​​portions cooperate with the snap-fit ​​blocks on the fuel pump body 1 to form a stable snap-fit ​​connection. The fuel pump body 1 has locking blocks on both sides of the pump outlet 25. These locking blocks can precisely insert into the first locking groove 23 and the second locking groove 24 to ensure a tight connection between the injection unit 4 and the fuel pump body 1. This locking method is not only easy to install but also provides a secure connection, maintaining the stability and reliability of the injection unit 4 even during high-speed operation of the fuel pump. Furthermore, this design facilitates disassembly and maintenance of the injection unit 4 when needed, further enhancing the practicality and convenience of the fuel pump assembly.

[0027] Furthermore, the snap-fit ​​component 20 has two symmetrically arranged pump body claws 26 and two symmetrically arranged injection part claws 27. The pump body snap-fit ​​structure 21 has a recessed pump body groove 28. The pump body claws 26 extend into the pump body groove 28 and snap-fit ​​with the pump body snap-fit ​​structure 21. The injection part claw 27 has a claw groove 29 at the end that connects with the injection part 4. A limiting end 30 protrudes from the injection part 4 corresponding to the claw groove 29. The limiting end 30 extends into the claw groove 29 and snaps-fits with the injection part claw 27. Specifically, in this embodiment, the design of the snap-fit ​​component 20 further enhances the connection stability between the injection part 4 and the fuel pump body 1. The snap-fit ​​component 20 has two symmetrically arranged pump body claws 26 and two symmetrically arranged injection part claws 27. This design ensures the balance and stability of the snap-fit ​​component 20 during the connection process. The pump body claw 26 extends into the pump body slot 28 and engages with the pump body locking structure 21 to achieve a snap-fit ​​connection. This connection method is not only simple and reliable, but also effectively prevents the pump body claw 26 from loosening or falling off during the connection process. Meanwhile, the design of the jetting part claw 27 also fully considers the stability and convenience of the connection. A claw groove 29 is formed on the end of the jetting part claw 27 that connects to the jetting part 4, and a limiting end 30 protrudes from the jetting part 4 corresponding to the claw groove 29. When the limiting end 30 extends into the claw groove 29, a stable snap-fit ​​connection is formed between the jetting part claw 27 and the jetting part 4. This design not only simplifies the installation process but also improves the reliability and durability of the connection.

[0028] Furthermore, the first main body 8 and the second main body 9 are fixed together by laser welding. Specifically, in this embodiment, the first main body 8 and the second main body 9 are fixed together by laser welding. As a high-precision and high-strength welding technology, laser welding can ensure the precise alignment and firm connection of the first main body 8 and the second main body 9 during the connection process. Through laser welding, the connection gap between the first main body 8 and the second main body 9 is precisely fused together, forming a strong weld. This weld not only enhances the overall structural strength of the remote oil suction buffer device 3, but also effectively prevents oil leakage in the connection gap. This welding method not only improves the sealing performance of the fuel pump assembly, but also further extends its service life.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel fuel pump assembly with a buffer structure, comprising a fuel pump body disposed within a fuel reservoir, characterized in that: The fuel pump body is equipped with a detachable remote fuel suction buffer device, which is connected to both the fuel pump body and the inside of the fuel tank. The remote fuel suction buffer device has an injection section connected to the fuel pump body, an ejector section connected to the inside of the fuel tank for ejection, and a buffered fuel outlet section connected to the inside of the fuel tank. The fuel in the fuel tank and the fuel pump body enters the buffered fuel outlet section through the ejector section and the injection section, respectively. The buffered fuel outlet section has a buffer structure, which buffers the fuel before it flows back into the fuel tank.

2. The novel fuel pump assembly with a buffer structure according to claim 1, characterized in that: The distal oil suction buffer device includes a first body and a second body. The ejector and the spraying part are respectively formed on the first body and the second body. The first buffer oil outlet and the second buffer oil outlet are respectively recessed on the opposite end faces of the first body and the second body. The first buffer oil outlet and the second buffer oil outlet are symmetrically arranged. The first buffer oil outlet is connected to the ejector, and the spraying part is connected to the second buffer oil outlet. After the first body and the second body are connected, the first buffer oil outlet and the second buffer oil outlet are connected to form a buffer oil outlet.

3. The novel fuel pump assembly with a buffer structure according to claim 1, characterized in that: The buffer structure within the buffer oil outlet section includes a buffer oil passage section connecting the ejector section and the spray section, and a buffer chamber section located at the end of the buffer oil passage section away from the spray section. The buffer chamber section has a buffer oil outlet that connects to the inside of the oil storage tank.

4. The novel fuel pump assembly with a buffer structure according to claim 3, characterized in that: The buffer oil outlet is provided with a jet pump connecting part on the side near the jetting part. The jet pump connecting part connects the jetting part and the buffer oil passage part respectively. The inner diameter of the buffer oil passage part gradually increases from the side near the jetting part toward the buffer chamber part.

5. The novel fuel pump assembly with a buffer structure according to claim 3, characterized in that: The inner wall of the buffer oil passage and the inner wall of the buffer chamber are smoothly transitioned. The volume of the buffer chamber is larger than the volume of the buffer oil passage. The buffer oil outlet is arranged along the width direction of one side of the inner wall of the buffer chamber. The two opposite side inner walls of the buffer oil outlet and the top inner wall of the buffer oil outlet are flush with the two side inner walls and the top inner wall of the buffer chamber, respectively.

6. The novel fuel pump assembly with a buffer structure according to claim 5, characterized in that: The inner walls of the buffer chamber near the buffer oil outlet are recessed to form oil guide grooves. The oil guide grooves have a bottom that is flush with the two side walls of the buffer oil outlet and an arc-shaped surface that connects with the inner walls of the buffer chamber near the buffer oil outlet. The top inner wall of the buffer chamber is provided with an arc-shaped buffer structure.

7. The novel fuel pump assembly with a buffer structure according to claim 1, characterized in that: A snap-fit ​​component is provided between the injection unit and the fuel pump body. A pump body snap-fit ​​structure is provided on the fuel pump body. A buffer device snap-fit ​​structure is provided on the injection unit. The buffer device snap-fit ​​structure is snap-fitted to the pump body snap-fit ​​structure. The snap-fit ​​component is provided between the buffer device snap-fit ​​structure and the pump body snap-fit ​​structure and is snap-fitted and fixed to both the buffer device snap-fit ​​structure and the pump body snap-fit ​​structure respectively.

8. The novel fuel pump assembly with a buffer structure according to claim 7, characterized in that: The buffer device has a snap-fit ​​structure consisting of an annular rib protruding from the outer wall of the injection section. The injection section divides the interior of the annular rib into a first snap-fit ​​section and a second snap-fit ​​section. The fuel pump body has a pump body outlet that communicates with the injection section. The pump body snap-fit ​​structure consists of snap-fit ​​blocks on both sides of the pump body outlet. The snap-fit ​​blocks on both sides of the pump body outlet extend into the first snap-fit ​​section and the second snap-fit ​​section respectively and snap-fit ​​with the injection section.

9. The novel fuel pump assembly with a buffer structure according to claim 7, characterized in that: The snap-fit ​​component has two symmetrically arranged pump body snap-fit ​​claws and two symmetrically arranged spray part snap-fit ​​claws. The pump body snap-fit ​​structure has an inwardly recessed pump body snap-fit ​​groove. The pump body snap-fit ​​claws extend into the pump body snap-fit ​​groove and snap-fit ​​with the pump body snap-fit ​​structure. The spray part snap-fit ​​claws have a claw groove on one end that connects with the spray part. The spray part protrudes from the claw groove to form a limiting end. The limiting end extends into the claw groove and snaps and fixes with the spray part snap-fit ​​claws.

10. The novel fuel pump assembly with a buffer structure according to claim 2, characterized in that: The first and second bodies are fixed together by laser welding.

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