Automobile fuel pump with good plugging effect

Abstract

The utility model discloses an automobile fuel pump with a good plugging effect, which comprises a pump body, an oil inlet pipe is connected to the outer side of the pump body, an oil outlet pipe is connected to the outer side of the pump body, and connecting mechanisms are arranged on the oil inlet pipe and the oil outlet pipe. The connecting mechanism comprises a clamping sleeve, an external pipe, sliding holes, clamping blocks, clamping grooves, a sealing strip, a sealing gasket and a pressing mechanism, the clamping sleeve is fixed to the top ends of the oil inlet pipe and the oil outlet pipe, the external pipe is inserted into the clamping sleeve, the multiple sets of sliding holes are distributed in the outer wall of the clamping sleeve, and the multiple sets of clamping blocks slide in the multiple sets of sliding holes correspondingly; the multiple sets of clamping grooves are distributed in the outer wall of the outer connecting pipe and clamped with the multiple sets of clamping blocks respectively, the multiple sets of sealing strips are distributed on the outer wall of the outer connecting pipe to form a first sealing barrier, the sealing gasket on the inner side tightly abuts against the outer connecting pipe to form a second sealing barrier, and the sealing performance of the connecting position is remarkably improved through the double-sealing structure.

Description

Technical Field

[0001] This utility model relates to the field of automotive fuel pump technology, and more specifically, to an automotive fuel pump with good sealing effect. Background Technology

[0002] In modern automotive fuel systems, the fuel pump, as a key component, is responsible for delivering fuel from the fuel tank to the engine. Its sealing performance is directly related to the safety and reliability of the fuel system. However, fuel pumps commonly used in the market often have poor sealing at the connection points between the fuel inlet and outlet pipes and external pipelines. During long-term vehicle operation, these connections are constantly affected by engine vibration, temperature changes, and fuel pressure pulsations, making them prone to minor leaks. This not only causes fuel loss and environmental pollution but also potentially increases the risk of fire. Especially in high-pressure fuel systems, even a tiny leak can form a flammable mixture due to the volatility of fuel, posing a serious threat to vehicle safety.

[0003] In the field of automotive repair and maintenance, the inspection and replacement of fuel systems are common maintenance items. Technicians need to frequently disassemble and assemble fuel pumps and their connecting pipes. The existing fuel pump connection structure usually adopts traditional threaded connections or clamp fixing methods. These connection methods not only require the use of special tools and are cumbersome and time-consuming to operate, but also make it difficult to work in confined spaces, increasing the workload of technicians. At the same time, repeated disassembly and assembly can easily damage the connecting parts, causing wear and deformation of the sealing surface, further deteriorating the sealing performance of the connection. This design, which is not convenient for quick connection and disassembly, not only reduces repair efficiency and increases maintenance costs, but may also cause new leakage hazards due to improper operation, failing to meet the urgent needs of the modern automotive repair industry for efficient, safe, and convenient operation. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, this utility model provides an automotive fuel pump with good sealing effect to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a car fuel pump with good sealing effect, comprising a pump body, an inlet pipe connected to the outside of the pump body, and an outlet pipe connected to the outside of the pump body. Both the inlet and outlet pipes are provided with a connecting mechanism. The connecting mechanism includes a snap-fit ​​sleeve, an outer pipe, a sliding hole, a snap block, a snap groove, a sealing strip, a sealing gasket, and a pressing mechanism. The snap-fit ​​sleeve is fixed to the top of the inlet and outlet pipes. The outer pipe is inserted into the snap-fit ​​sleeve. Multiple sets of sliding holes are distributed on the outer wall of the snap-fit ​​sleeve. Multiple sets of snap blocks slide within the multiple sets of sliding holes. Multiple sets of snap grooves are distributed on the outer wall of the outer pipe and engage with the multiple sets of snap blocks. Multiple sets of sealing strips are distributed on the outer wall of the outer pipe. The sealing gasket is disposed inside the snap-fit ​​sleeve and abuts against the outer pipe.

[0008] The present invention is further configured such that the pressing mechanism includes a push sleeve, a groove, a threaded sleeve, a fixed plate, a stop block, and a stop groove. The push sleeve slides on the outer wall of the snap-fit ​​sleeve. Multiple sets of grooves are distributed on the top surface of the push sleeve. The threaded sleeve is threadedly connected to the outer wall of the snap-fit ​​sleeve. The fixed plate is fixed to the outer wall of the snap-fit ​​sleeve. Multiple sets of abutments are fixed to the outer wall of the fixed plate. The stop groove is located inside the multiple sets of abutments. This pressing mechanism design achieves precise pressure control at the connection. By rotating the threaded sleeve, the push sleeve is driven to move, so that the groove applies uniform pressure to the snap-fit ​​block. At the same time, the cooperation between the abutment block and the stop groove forms a stable lock, ensuring a firm connection and good sealing effect, and preventing fuel leakage.

[0009] The present invention is further configured such that a positioning strip is fixedly provided on the inner wall of the snap-fit ​​sleeve, and a positioning groove is provided on the outer wall of the outer tube. Multiple sets of positioning strips and positioning grooves are provided. The cooperative design of multiple sets of positioning strips and positioning grooves ensures that the outer tube is positioned in the correct direction during insertion, preventing misalignment and rotation, enabling the sealing surface to be accurately aligned, while enhancing the torsional resistance of the connection and improving the overall stability and reliability of the connection.

[0010] The present invention is further configured such that a compression spring is connected to the top surface of the sealing strip, and multiple sets of the compression spring are provided and connected to the inner wall of the snap-fit ​​sleeve. The compression spring provides continuous and uniform elastic pressure to the sealing strip, enabling the sealing strip to actively conform to the surface of the outer pipe. Even under minor deformation caused by vehicle vibration or temperature changes, it can still maintain a good sealing effect. At the same time, it assists in pushing the outer pipe to detach during disassembly, improving the adaptability and service life of the connection.

[0011] The present invention is further configured such that a thrust bearing is provided between the bottom surface of the push sleeve and the threaded sleeve. The thrust bearing effectively reduces the rotational friction between the push sleeve and the threaded sleeve, allowing the operator to rotate the threaded sleeve with a smaller torque. At the same time, it ensures that the push sleeve only receives axial thrust and does not rotate with the threaded sleeve, thereby improving the sensitivity of adjustment and the comfort of operation, and extending the service life of the mechanism.

[0012] The present invention is further configured such that the inner wall of the push sleeve is provided with a guide plate, and the outer wall of the snap-fit ​​sleeve is provided with a guide groove. The guide plate and the guide groove are provided in multiple sets and are slidably connected. The slidable connection design of the guide plate and the guide groove restricts the motion freedom of the push sleeve, ensuring that the push sleeve can only move along the axial direction without rotation or offset, ensuring that the pressure applied by the push sleeve is evenly distributed on each snap-fit ​​block, and improving the stability and accuracy of the pressing process.

[0013] This utility model is further configured such that a control mechanism is provided on the outer side of the snap-fit ​​sleeve. The control mechanism includes a control sleeve, an arc-shaped groove, a sliding rod, a connecting plate, a sliding plate, a tension spring, and a sliding groove. Multiple sets of control sleeves are provided on the inner side of multiple sets of snap-fit ​​blocks. Multiple sets of arc-shaped grooves are provided on the outer side of the control sleeve. Multiple sets of sliding rods are provided and slide on the outer side of multiple sets of snap-fit ​​blocks. The connecting plate is fixed to the bottom end of multiple sets of sliding rods. The sliding plate is fixed to the inner side of multiple sets of connecting plates. The tension spring is connected to the outer wall of multiple sets of connecting plates and to the inner wall of the snap-fit ​​blocks. Multiple sets of sliding grooves are provided on the outer wall of the snap-fit ​​sleeve and slide on multiple sets of sliding plates. This control mechanism drives the snap-fit ​​blocks to move along the arc-shaped groove by rotating the control sleeve. With the elastic action of the tension spring, the snap-fit ​​blocks and snap-fit ​​grooves can be quickly engaged and disengaged, greatly simplifying the connection and disassembly operations. It can be completed without tools, improving maintenance efficiency. At the same time, the guide of the sliding plate in the sliding groove ensures the accuracy of the operation.

[0014] The present invention is further configured such that control strips are fixedly provided on the outer sides of the multiple sets of control sleeves, and control grooves are provided on the inner sides of the multiple sets of locking blocks. The multiple sets of control grooves are slidably connected to the multiple sets of control sleeves. The sliding connection between the control strips and the control grooves further enhances the linkage between the control sleeves and the locking blocks, ensuring that the rotational action of the control sleeves can be accurately transmitted to each locking block, so that all locking blocks move synchronously, avoiding connection failure caused by individual locking blocks jamming or asynchronous action, and improving the reliability and durability of the entire control mechanism.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a car fuel pump with good sealing effect, which has the following beneficial effects:

[0017] 1. The connecting mechanism, through the ingenious cooperation of the snap-fit ​​sleeve, outer pipe, sliding hole, snap-fit ​​block, snap-fit ​​groove, sealing strip, and sealing gasket, constructs a multi-layer sealing and leak-proof system. First, the snap-fit ​​block and snap-fit ​​groove achieve initial positioning and connection. At the same time, multiple sets of sealing strips are distributed on the outer wall of the outer pipe to form the first sealing barrier, while the inner sealing gasket tightly abuts against the outer pipe to form the second sealing barrier. This double sealing structure significantly improves the sealing performance at the connection, effectively avoiding safety hazards and fuel loss caused by fuel leakage. Moreover, the design of the positioning strip and positioning groove ensures accurate insertion positioning, solving the problem of poor sealing effect in the existing technology.

[0018] 2. The clamping mechanism utilizes a precision structure of push sleeve, groove, threaded sleeve, fixed disc, abutment block, and abutment groove. By rotating the threaded sleeve, the push sleeve is moved, causing the groove to apply precise pressure to the locking block. At the same time, the outer tube is pushed, causing the sealing strip to be squeezed against the inner wall of the locking sleeve, enhancing the sealing effect. Finally, the locking block abuts against the abutment groove to form a lock. This adjustable clamping design allows the operator to control the clamping force as needed, ensuring the sealing effect without damaging the sealing components due to excessive compression. The application of the thrust bearing reduces rotational friction, making the adjustment smoother and more controllable.

[0019] 3. The control mechanism adopts a combination design of control sleeve, arc groove, slide rod, connecting plate, slide plate, tension spring and slide groove, which realizes precise control of the release of the locking block. When disassembly is required, simply rotate the control sleeve to make the locking block disengage from the arc groove and disengage from the slot with the help of the tension spring. The whole process does not require special tools, and the operation is simple and intuitive, which greatly improves the efficiency of disassembly and assembly. At the same time, the sliding connection between the control bar and the control groove ensures the stability and accuracy of the control sleeve rotation, perfectly solving the problem of inconvenient quick connection and disassembly in the existing technology, and is particularly suitable for the high-efficiency operation needs of the automotive repair field. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a car fuel pump with good sealing effect according to the present invention;

[0021] Figure 2 This is a schematic diagram showing the disassembled structure of the domestic and foreign connecting pipes in this utility model;

[0022] Figure 3 This is a cross-sectional view of the snap-fit ​​mechanism in this utility model;

[0023] Figure 4 This is a cross-sectional view of the snap-fit ​​sleeve in this utility model;

[0024] Figure 5 This is a cross-sectional view of the control mechanism in this utility model.

[0025] In the diagram: 1. Pump body; 2. Inlet pipe; 3. Outlet pipe; 4. Snap-fit ​​sleeve; 5. Outer pipe; 6. Sliding hole; 7. Clamping block; 8. Clamping groove; 9. Sealing strip; 10. Sealing gasket; 11. Push sleeve; 12. Groove; 13. Threaded sleeve; 14. Fixed plate; 15. Abutment block; 16. Abutment groove; 17. Positioning strip; 18. Positioning groove; 19. Compression spring; 20. Thrust bearing; 21. Guide plate; 22. Guide groove; 23. Control sleeve; 24. Arc groove; 25. Sliding rod; 26. Connecting plate; 27. Sliding plate; 28. Tension spring; 29. ​​Sliding groove; 30. Control strip; 31. Control groove. Detailed Implementation

[0026] It should be noted that, where there is no conflict, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5 A car fuel pump with good sealing effect includes a pump body 1, an inlet pipe 2 connected to the outside of the pump body 1, and an outlet pipe 3 connected to the outside of the pump body 1. Both the inlet pipe 2 and the outlet pipe 3 are provided with a connecting mechanism. The connecting mechanism includes a snap-fit ​​sleeve 4, an outer pipe 5, a sliding hole 6, a snap block 7, a snap groove 8, a sealing strip 9, a sealing gasket 10, and a pressing mechanism. The snap-fit ​​sleeve 4 is fixed to the top of the inlet pipe 2 and the outlet pipe 3. The outer pipe 5 is inserted into the snap-fit ​​sleeve 4. Multiple sets of sliding holes 6 are provided on the outer wall of the snap-fit ​​sleeve 4. Multiple sets of snap blocks 7 are provided and slide in multiple sets of sliding holes 6. Multiple sets of snap grooves 8 are provided on the outer wall of the outer pipe 5 and engage with multiple sets of snap blocks 7. Multiple sets of sealing strips 9 are provided on the outer wall of the outer pipe 5. The sealing gasket 10 is provided on the inner side of the snap-fit ​​sleeve 4 and abuts against the outer pipe 5.

[0030] The clamping mechanism includes a push sleeve 11, a groove 12, a threaded sleeve 13, a fixed plate 14, a stop block 15, and a stop groove 16. The push sleeve 11 slides on the outer wall of the snap-fit ​​sleeve 4. Multiple sets of grooves 12 are distributed on the top surface of the push sleeve 11. The threaded sleeve 13 is threadedly connected to the outer wall of the snap-fit ​​sleeve 4. The fixed plate is fixed to the outer wall of the snap-fit ​​sleeve 4. Multiple sets of a stop blocks 15 are fixed to the outer wall of the fixed plate 14. The stop groove is located inside the multiple sets of a stop blocks 15. When the threaded sleeve 13 is rotated, the rotational motion is converted into the axial movement of the push sleeve 11 through the threaded transmission. The groove 12 on the top surface of the push sleeve 11 contacts the bottom of the snap block 7 and applies pressure, making the snap block 7 more tightly embedded in the snap groove 8. At the same time, it pushes the outer pipe 5 to squeeze the seal. The a stop block 15 on the fixed plate 14 and the stop groove 16 form a locking mechanism to prevent the snap block 7 from coming out under pressure, thus achieving a stable sealing and clamping.

[0031] The inner wall of the snap-fit ​​sleeve 4 is fixed with a positioning strip 17, and the outer wall of the outer pipe 5 is provided with a positioning groove 18. Multiple sets of positioning strips 17 and positioning grooves 18 are provided. When the outer pipe 5 is inserted into the snap-fit ​​sleeve 4, the positioning strips 17 and positioning grooves 18 cooperate with each other to ensure that the outer pipe 5 can only be inserted in a specific direction to prevent misalignment. At the same time, multiple sets of positioning structures are distributed in the circumferential direction, which enhances the torsional resistance of the connection, ensures precise alignment of the sealing surface, and provides an accurate initial position for subsequent sealing and locking operations.

[0032] A compression spring 19 is connected to the top surface of the sealing strip 9. Multiple compression springs 19 are provided and connected to the inner wall of the snap sleeve 4. The compression spring 19 provides continuous elastic support for the sealing strip 9. When the outer tube 5 is inserted into the snap sleeve 4, the sealing strip 9 always maintains close contact with the outer wall of the outer tube 5 under the action of the compression spring 19. Even if vibration or temperature change causes slight deformation, the elastic support can still ensure the sealing effect. At the same time, when disassembling, the rebound force of the compression spring 19 helps to push the outer tube 5 out of the snap sleeve 4.

[0033] A thrust bearing 20 is provided between the bottom surface of the push sleeve 11 and the threaded sleeve 13. The thrust bearing 20 is located between the push sleeve 11 and the threaded sleeve 13. When the threaded sleeve 13 is rotated, the thrust bearing 20 reduces the frictional resistance between the threaded sleeve 13 and the push sleeve 11, making the rotation operation easier and smoother. At the same time, it ensures that the rotational force is only converted into axial thrust and will not drive the push sleeve 11 to rotate together, thereby improving the accuracy and comfort of the clamping operation.

[0034] The inner wall of the push sleeve 11 is provided with a guide plate 21, and the outer wall of the snap sleeve 4 is provided with a guide groove 22. Multiple sets of guide plates 21 and guide grooves 22 are provided and slidably connected. The guide system formed by the guide plate 21 embedded in the guide groove 22 restricts the degree of freedom of movement of the push sleeve 11, ensuring that the push sleeve 11 can only move along the axial direction of the snap sleeve 4 without rotation or offset. This constraint ensures that the pressure applied by the push sleeve 11 is evenly distributed on each snap block 7, improving the stability and consistency of the entire pressing process.

[0035] A control mechanism is provided on the outer side of the snap-fit ​​sleeve 4. The control mechanism includes a control sleeve 23, an arc-shaped groove 24, a slide rod 25, a connecting plate 26, a sliding plate 27, a tension spring 28, and a sliding groove 29. The control sleeve 23 has multiple sets disposed inside multiple sets of snap-fit ​​blocks 7. The arc-shaped groove 24 has multiple sets distributed on the outer side of the control sleeve 23. The slide rod 25 has multiple sets that slide on the outer side of multiple sets of snap-fit ​​blocks 7 respectively. The connecting plate 26 is fixed to the bottom end of multiple sets of slide rods 25. The sliding plate 27 is fixed to the inner side of multiple sets of connecting plates 26. The tension spring 28 is connected to the outer wall of multiple sets of connecting plates 26 and is flush with the inner wall of snap-fit ​​blocks 7. The connection is achieved by a sliding groove 29 with multiple sets of sliding plates 27 distributed on the outer wall of the snap sleeve 4. When the control sleeve 23 is rotated, the arc-shaped surface in the arc groove 24 pushes the sliding rod 25 to move. The sliding rod 25 drives the connecting plate 26 and the sliding plate 27 to slide along the sliding groove 29, thereby controlling the radial position of the snap block 7. The tension spring 28 provides the return force, so that the snap block 7 can automatically enter or exit the snap slot 8 according to the position of the control sleeve 23. This linkage mechanism design allows the operator to control the locking or releasing of all snap blocks 7 at the same time by simply rotating the control sleeve 23.

[0036] Multiple control sleeves 23 are each fixedly equipped with control strips 30 on their outer sides, and multiple locking blocks 7 are each equipped with control grooves 31 on their inner sides. The multiple control grooves 31 are slidably connected to the multiple control sleeves 23 respectively. The sliding connection between the control strips 30 and the control grooves 31 forms a second layer of linkage between the control sleeves 23 and the locking blocks 7. When the control sleeves 23 rotate, the control strips 30 slide along the control grooves 31 to ensure that all locking blocks 7 can respond synchronously to the rotation of the control sleeves 23. This dual linkage design enhances the stability and reliability of the control mechanism and prevents connection failures caused by individual locking blocks 7 jamming or asynchronous actions.

[0037] In this embodiment, during use, the outer pipe 5 is inserted into the snap-fit ​​sleeve 4, and the multiple sets of positioning strips 17 are positioned and inserted into the positioning grooves 18. The control sleeve 23 is rotated to move the multiple sets of snap-fit ​​blocks 7 into the arc-shaped grooves 24. The tension spring 28 pulls the snap-fit ​​blocks 7 into the snap-fit ​​grooves 8. The threaded sleeve 13 is rotated to push the push sleeve 11 through the thrust bearing 20, so that the multiple sets of grooves 12 abut against the bottom surface of the multiple sets of snap-fit ​​blocks 7. The multiple sets of snap-fit ​​blocks 7 are pushed to slide along the sliding hole 6 and push the outer pipe 5 so that the multiple sets of sealing rings are squeezed against the inner wall of the snap-fit ​​sleeve 4. At the same time, the sealing gasket 10 is pushed to squeeze the compression spring 19 and squeeze the sealing gasket 10. Then the multiple sets of snap-fit ​​blocks 7 abut against the grooves 16 and are pressed together to complete the sealing connection of the outer pipe 5.

[0038] More specifically, when disassembly is required, loosening the threaded sleeve 13 releases the clamping of the multiple sets of locking blocks 7, and the multiple sets of compression springs 19 reset and push the sealing gasket 10, which in turn pushes the outer pipe 5, while simultaneously causing the multiple sets of locking blocks 7 to disengage from the groove 16. Then, rotating the control sleeve 23 causes the multiple sets of locking blocks 7 to disengage from the arc groove 24 and pulls the locking blocks 7 out of the slot 8, thus releasing the clamping of the outer pipe 5.

[0039] In summary, during use or operation of the overall equipment: When in use, the outer pipe 5 is inserted into the snap-fit ​​sleeve 4, and the multiple sets of positioning strips 17 are positioned and inserted into the positioning grooves 18. The control sleeve 23 is rotated to move the multiple sets of snap-fit ​​blocks 7 into the arc-shaped grooves 24. The tension spring 28 pulls the snap-fit ​​blocks 7 into the snap-fit ​​grooves 8. The threaded sleeve 13 is rotated to push the push sleeve 11 through the thrust bearing 20, so that the multiple sets of grooves 12 abut against the bottom surface of the multiple sets of snap-fit ​​blocks 7. The multiple sets of snap-fit ​​blocks 7 are pushed to slide along the sliding hole 6 and push the outer pipe 5 so that the multiple sets of sealing rings are squeezed against the inner wall of the snap-fit ​​sleeve 4. At the same time, the sealing gasket 10 is pushed to squeeze the compression spring 19 and squeeze the sealing gasket 10. Then the multiple sets of snap-fit ​​blocks 7 abut against the grooves 16 and are pressed together, thus completing the sealing connection of the outer pipe 5.

[0040] When disassembly is required, loosen the threaded sleeve 13 to release the clamping of the multiple sets of locking blocks 7, and push the sealing gasket 10 through the multiple sets of compression springs 19. The sealing gasket 10 pushes the outer pipe 5, and at the same time, it drives the multiple sets of locking blocks 7 to disengage from the groove 16. Then, rotate the control sleeve 23 to make the multiple sets of locking blocks 7 disengage from the arc groove 24 and pull the locking blocks 7 out of the locking groove 8, thereby releasing the locking of the outer pipe 5.

[0041] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A car fuel pump with good sealing effect, comprising a pump body (1), characterized in that: An oil inlet pipe (2) is connected to the outside of the pump body (1), and an oil outlet pipe (3) is connected to the outside of the pump body (1). Both the oil inlet pipe (2) and the oil outlet pipe (3) are equipped with a connecting mechanism. The connecting mechanism includes a snap-fit ​​sleeve (4), an outer pipe (5), a sliding hole (6), a snap-fit ​​block (7), a snap-fit ​​groove (8), a sealing strip (9), a sealing gasket (10), and a pressing mechanism. The snap-fit ​​sleeve (4) is fixed to the top of the oil inlet pipe (2) and the oil outlet pipe (3). The outer tube (5) is inserted into the snap-fit ​​sleeve (4). Multiple sets of sliding holes (6) are provided on the outer wall of the snap-fit ​​sleeve (4). Multiple sets of snap-fit ​​blocks (7) are provided and slide in multiple sets of sliding holes (6). Multiple sets of snap-fit ​​grooves (8) are provided on the outer wall of the outer tube (5) and engage with multiple sets of snap-fit ​​blocks (7). Multiple sets of sealing strips (9) are provided on the outer wall of the outer tube (5). The sealing gasket (10) is provided on the inner side of the snap-fit ​​sleeve (4) and abuts against the outer tube (5).

2. The automotive fuel pump with good sealing effect according to claim 1, characterized in that: The clamping mechanism includes a push sleeve (11), a groove (12), a threaded sleeve (13), a fixed plate (14), abutments (15), and abutment grooves (16). The push sleeve (11) slides on the outer wall of the snap-fit ​​sleeve (4). The groove (12) is provided in multiple sets distributed on the top surface of the push sleeve (11). The threaded sleeve (13) is threadedly connected to the outer wall of the snap-fit ​​sleeve (4). The fixed plate is fixed to the outer wall of the snap-fit ​​sleeve (4). The abutments (15) are provided in multiple sets fixed to the outer wall of the fixed plate (14). The abutment grooves are provided inside the multiple sets of abutments (15).

3. The automotive fuel pump with good sealing effect according to claim 2, characterized in that: The inner wall of the snap sleeve (4) is fixedly provided with a positioning strip (17), and the outer wall of the outer pipe (5) is provided with a positioning groove (18). Both the positioning strip (17) and the positioning groove (18) are provided in multiple sets.

4. The automotive fuel pump with good sealing effect according to claim 3, characterized in that: The top surface of the sealing strip (9) is connected to a compression spring (19), and multiple sets of the compression spring (19) are provided and connected to the inner wall of the snap sleeve (4).

5. The automotive fuel pump with good sealing effect according to claim 4, characterized in that: A thrust bearing (20) is provided between the bottom surface of the push sleeve (11) and the threaded sleeve (13).

6. The automotive fuel pump with good sealing effect according to claim 5, characterized in that: The inner wall of the push sleeve (11) is provided with a guide plate (21), and the outer wall of the snap sleeve (4) is provided with a guide groove (22). The guide plate (21) and the guide groove (22) are provided in multiple sets and are slidably connected.

7. The automotive fuel pump with good sealing effect according to claim 6, characterized in that: The outer side of the snap-fit ​​sleeve (4) is provided with a control mechanism, which includes a control sleeve (23), an arc groove (24), a slide rod (25), a connecting plate (26), a slide plate (27), a tension spring (28), and a sliding groove (29). The control sleeve (23) is provided with multiple sets disposed inside multiple sets of snap-fit ​​blocks (7). The arc groove (24) is provided with multiple sets distributed outside the control sleeve (23). The slide rod (25) is provided with multiple sets that slide on the outer side of multiple sets of snap-fit ​​blocks (7). The connecting plate (26) is fixed to the bottom end of multiple sets of slide rods (25). The slide plate (27) is fixed to the inner side of multiple sets of connecting plates (26). The tension spring (28) is connected to the outer wall of multiple sets of connecting plates (26) and connected to the inner wall of snap-fit ​​blocks (7). The sliding groove (29) is provided with multiple sets distributed on the outer wall of the snap-fit ​​sleeve (4) and slidably connected to multiple sets of slide plates (27).

8. A car fuel pump with good sealing effect according to claim 7, characterized in that: multiple sets The outer side of each control sleeve (23) is fixedly provided with a control strip (30), and the inner side of each set of the card blocks (7) is provided with a control groove (31). The multiple sets of control grooves (31) are slidably connected to the multiple sets of control sleeves (23).

Images