Filter screen mounting structure of fuel pump assembly

Abstract

The utility model discloses a filter screen installation structure of a fuel pump assembly, which comprises a filter and a filter screen component, the upper end of the filter screen component is provided with a fixing frame, the outer edge of the fixing frame is convexly provided with a plurality of support arms, each support arm is provided with a through hole which is through from inside to outside, the outer side of the lower end of the filter is provided with buckles with the same number as the through holes, the buckles are clamped in the through holes, and the filter screen component is provided with a filter screen. A positioning ring is fixed to the bottom of the filter, a plurality of protruding blocks are downwards arranged at the bottom of the positioning ring in a protruding mode, extrusion devices with the number equal to that of the protruding blocks are installed on the fixing frame, each extrusion device comprises a telescopic ejector block, and the ejector blocks are pressed at the bottoms of the protruding blocks. The buckle is clamped into the through hole to play a role in basic fixation, the top block is pressed at the bottom of the convex block, the convex block can be ejected upwards, so that the whole filter is ejected upwards, equivalently, an upward force is applied to the buckle, the buckle can be in close contact with the inner wall of the upper end of the through hole, the buckle is stably clamped at the upper end of the through hole, and the buckle is not prone to falling off. Therefore, the filter screen assembly and the filter are installed more stably.

Description

Technical Field

[0001] This utility model relates to the field of fuel pump assembly technology, specifically a filter installation structure for a fuel pump assembly. Background Technology

[0002] In a fuel supply system, the fuel pump assembly, as a core component, is typically installed inside the fuel tank. Its structural design plays a crucial role in the efficiency and stability of fuel delivery. The fuel pump assembly generally includes components such as a fuel reservoir, fuel pump, filter, injection pump, filter screen assembly, pressure valve, fuel level sensor, and check valve. The fuel pump assembly draws fuel from the fuel tank and continuously delivers it to the engine through the fuel supply lines.

[0003] The lower end of the filter is connected to the filter screen assembly. To allow for later disassembly of the filter screen assembly, it is usually not welded to the filter. Instead, a through hole is provided on the upper outer edge of the filter screen assembly, and a clip is provided on the lower outer side of the filter. The clip engages with the through hole, thus connecting the filter screen assembly to the filter. However, the height of the through hole is much higher than the clip for easier installation. But vehicles are prone to shaking during driving, which can also cause the fuel pump assembly to shake. This shaking can cause the clip to slip in the through hole, and in severe cases, it can even cause the clip to fall off. Therefore, the filter screen assembly and the filter are not installed securely. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of this utility model is to provide a filter installation structure for a fuel pump assembly.

[0005] The technical solution of this utility model is: a filter screen installation structure for a fuel pump assembly, including a filter and a filter screen assembly. The upper end of the filter screen assembly has a fixing frame, and multiple support arms protrude from the outer edge of the fixing frame. Each support arm has a through hole that runs through the inside and outside. The lower end of the filter has a number of buckles equal to the number of through holes. The buckles are inserted into the through holes. A positioning ring is fixed at the bottom of the filter. Multiple protrusions protrude downward from the bottom of the positioning ring. The fixing frame is equipped with a number of pressing devices equal to the number of protrusions. Each pressing device includes a retractable top block that presses against the bottom of the protrusion.

[0006] Furthermore, the fixing frame is provided with multiple recessed holes, the upper end of which is open. A spring seat is fixed in each recessed hole. The extrusion device also includes springs that extend vertically, with the springs sleeved outside the spring seats and the upper end of the springs resting against the bottom of the top block.

[0007] Furthermore, the concave hole allows the top block to extend into.

[0008] Furthermore, the spring seat has a through hole running vertically through it, the lower end of the recessed hole is open and communicates with the through hole, a fastening screw is placed in the through hole, the bottom of the top block has a threaded sleeve, the fastening screw passes through the through hole and is tightened with the threaded sleeve.

[0009] Furthermore, the through hole allows the threaded sleeve to extend into.

[0010] Furthermore, the bottom of the fastening screw has a head that is accommodated in a through hole, and the upper end of the spring seat has a stop for blocking the head.

[0011] The beneficial effects of the filter installation structure for the fuel pump assembly provided by this utility model are as follows: the buckle is inserted into the through hole, which plays a basic fixing role; the top block presses on the bottom of the protrusion, which can push the protrusion upward, thereby pushing the entire filter upward. This is equivalent to giving the buckle an upward force, so that the buckle can make close contact with the inner wall of the upper end of the through hole, and the buckle is firmly locked at the upper end of the through hole. The buckle is not easy to fall off, making the filter assembly and filter more securely installed. Attached Figure Description

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

[0013] Figure 2 This is a schematic diagram of the installation of the extrusion device of this utility model;

[0014] Figure 3 for Figure 2 An enlarged schematic diagram of region A in the middle.

[0015] In the figure: 1—Filter, 11—Snap fastener, 2—Filter assembly, 3—Fixing bracket, 31—Support arm, 311—Through hole, 32—Concave hole, 4—Positioning ring, 41—Protrusion, 5—Top block, 51—Screw sleeve, 6—Spring seat, 61—Through hole, 62—Stop block, 7—Spring, 8—Fasting screw, 81—Head. Detailed Implementation

[0016] To provide a more intuitive and complete understanding of the technical solution of this utility model, the following non-limiting features are described in conjunction with the accompanying drawings:

[0017] like Figure 1 — Figure 3As shown, a filter installation structure for a fuel pump assembly includes a filter 1 and a filter assembly 2. The upper end of the filter assembly 2 has a fixing frame 3. Multiple support arms 31 protrude from the outer edge of the fixing frame 3. Each support arm 31 has a through hole 311 that runs through the inside and outside. The lower end of the filter 1 has a number of buckles 11 equal to the number of through holes 311. The buckles 11 are inserted into the through holes 311. A positioning ring 4 is fixed at the bottom of the filter 1. Multiple protrusions 41 protrude downward from the bottom of the positioning ring 4. The fixing frame 3 is equipped with a number of pressing devices equal to the number of protrusions 41. Each pressing device includes a retractable top block 5, which presses against the bottom of the protrusion 41.

[0018] like Figure 3 As shown, the fixing frame 3 has multiple recesses 32, each with an open top. A spring seat 6 is fixed inside each recess 32. The pressing device also includes a spring 7 extending vertically, which is sleeved around the spring seat 6. The upper end of the spring 7 rests against the bottom of the top block 5. The recesses 32 allow the top block 5 to extend into, facilitating its vertical movement.

[0019] like Figure 3 As shown, to prevent the top block 5 from falling off, the spring seat 6 has a through hole 61 extending vertically. The lower end of the recess 32 is open and communicates with the through hole 61. A fastening screw 8 is inserted into the through hole 61. The bottom of the top block 5 has a threaded sleeve 51. The fastening screw 8 passes through the through hole 61 and is tightened with the threaded sleeve 51. The through hole 61 allows the threaded sleeve 51 to extend into, facilitating the vertical movement of the top block 5. The bottom of the fastening screw 8 has a head 81 that is accommodated in the through hole 61. The upper end of the spring seat 6 has a stop block 62 for blocking the head 81 to prevent the fastening screw 8 from falling off. The top block 5 is firmly pressed against the bottom of the protrusion 41 by the elastic force of the spring 7.

[0020] The present invention provides a filter installation structure for a fuel pump assembly. The buckle 11 is inserted into the through hole 311 to provide basic fixation. The top block 5 presses on the bottom of the protrusion 41, which can push the protrusion 41 upward, thereby pushing the entire filter 1 upward. This is equivalent to giving the buckle 11 an upward force, so that the buckle 11 can make close contact with the upper inner wall of the through hole 311, and the buckle 11 is firmly locked at the upper end of the through hole 311. The buckle 11 is not easy to fall off, making the filter assembly 2 and the filter 1 more securely installed.

[0021] Of course, the above are only preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any simple modifications and equivalent structural changes made based on the contents of the present utility model specification and drawings should also be included within the patent protection scope of the present utility model.

Claims

1. A filter installation structure for a fuel pump assembly, comprising a filter and a filter assembly, wherein the upper end of the filter assembly has a fixing bracket, and the fixing bracket has multiple supporting arms protruding from its outer edge, each supporting arm having through holes extending inward and outward, and the lower end of the filter has a number of clips equal to the number of through holes, the clips engaging with the through holes, characterized in that: The bottom of the filter is fixed with a positioning ring, the bottom of the positioning ring is provided with a plurality of protrusions downward, the fixing frame is provided with a plurality of extrusion devices equal to the number of the protrusions, each extrusion device comprises a retractable top block, and the top block is pressed on the bottom of the protrusion.

2. A strainer mounting structure for a fuel pump assembly according to claim 1, characterized in that: The fixing frame is provided with a plurality of recessed holes, the upper end of each recessed hole is open, each recessed hole is fixed with a spring seat, the extrusion device further comprises a spring extending upward and downward, the spring is sleeved on the spring seat, and the upper end of the spring is located on the bottom of the top block.

3. A strainer mounting structure for a fuel pump assembly according to claim 2, wherein: The recessed hole is used for the top block to extend into.

4. A strainer mounting structure for a fuel pump assembly according to claim 2, wherein: The spring seat is provided with a through hole penetrating upward and downward, the lower end of the recessed hole is open and communicates with the through hole, a fastening screw is arranged in the through hole, the bottom of the top block is provided with a screw sleeve, the fastening screw penetrates out of the through hole and is screwed with the screw sleeve.

5. A strainer mounting structure for a fuel pump assembly according to claim 4, wherein: The through hole is used for the screw sleeve to extend into.

6. A strainer mounting structure for a fuel pump assembly according to claim 4, wherein: The bottom of the fastening screw is provided with a head portion accommodated in the through hole, and the upper end of the spring seat is provided with a stopper for stopping the head portion.

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