A type of automotive oil pump assembly

Abstract

This utility model relates to the field of gasoline pump assembly technology and discloses a vehicle fuel pump assembly, including a fuel cup, an electric fuel pump installed inside the fuel cup, and a housing installed on the outside of the fuel cup via a connecting structure. A connecting rod is installed on one side of the housing, and a fuel level sensor is installed at the end of the connecting rod. The connecting structure includes a housing fixed to the outside of the fuel cup, and two fixing blocks fitted into corresponding mounting holes. This utility model's connecting structure solves the inherent defects of traditional snap-fit ​​methods. It uses a sliding unlocking mechanism instead of a rigid buckle, and automatic alignment is achieved through a beveled guide, eliminating the need for precise angle alignment during disassembly. The spring-loaded slider evenly distributes the operating force, avoiding localized stress concentration and eliminating the risk of buckle breakage during disassembly. The entire disassembly and assembly process can be completed with a simple push-pull action, significantly improving maintenance convenience and reliability, while ensuring the stability of the connecting structure during long-term use.

Description

Technical Field

[0001] This utility model relates to the field of gasoline pump assembly technology, specifically to a vehicle fuel pump assembly. Background Technology

[0002] The fuel pump assembly is a core component of a car's fuel system, responsible for delivering fuel from the fuel tank to the engine and ensuring stable fuel pressure to meet injection requirements. Modern vehicles typically use electric fuel pump assemblies, which are integrated inside the fuel tank. Existing electric fuel pump assemblies mainly consist of a fuel cup, an electric fuel pump, a fuel pump bracket, a fuel level sensor, and connecting pipes.

[0003] The existing fuel cup and fuel level sensor are equipped with a connecting rod. One end of the connecting rod housing is connected and fixed to the fuel cup through a snap-fit ​​structure. However, during long-term use, its rigid snap-fit ​​is prone to plastic deformation or embrittlement under the action of fuel immersion and temperature cycling. When disassembling, the angle must be precisely aligned and excessive force must be applied, which can easily cause the snap-fit ​​to break. At the same time, the small space of the fuel tank makes it impossible to achieve visual operation. Maintenance personnel can easily damage the surrounding wiring harness by blindly operating by touch, making disassembly and installation quite inconvenient. Utility Model Content

[0004] The purpose of this utility model is to provide an automotive oil pump assembly that solves the problem that existing disassembly requires precise angle alignment and the application of excessive force, which can easily lead to clip breakage.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to an automotive oil pump assembly, comprising an oil cup, an electric oil pump installed inside the oil cup, a mounting rod slidably connected to the upper end of the oil cup, an oil pump bracket mounted on the upper end of the mounting rod, a connecting pipe inserted into the oil outlet of the electric oil pump, and the other end of the connecting pipe inserted into the oil inlet of the oil pump bracket. A housing is mounted on the outer side of the oil cup via a connecting structure, a connecting rod is mounted on one side of the housing, and an oil level sensor is mounted on the end of the connecting rod. The connecting structure includes a housing fixed to the outer side of the oil cup, a cover plate fixed to one side of the housing with a central opening, two sliders slidably disposed inside the housing, a spring with its two ends respectively connected to the outer sides of the two sliders, and two fixing blocks respectively fixed to the upper ends of the corresponding sliders and slidably engaged within the opening. A frame is fixed to the other side of the housing, with mounting holes at both ends of the frame, and the two fixing blocks are engaged within the corresponding mounting holes.

[0007] Furthermore, both ends of the outer shell are provided with mounting ports, and two slide rods slide through the corresponding mounting ports respectively, with one end of each slide rod fixedly connected to the outside of the corresponding slider.

[0008] Furthermore, a notch is provided at the lower end of the frame, and when the fixing block is inserted into the mounting hole, the outer end of the slide rod is located within the notch.

[0009] Furthermore, the lower end of the frame is provided with an arc-shaped guide surface, and the outer side of the fixing block is provided with an inclined surface, which slides in conjunction with the arc-shaped guide surface.

[0010] Furthermore, an auxiliary groove is provided on the inner wall of the outer shell, and an auxiliary block is fixed on the outer side of each slider, with each auxiliary block slidably embedded in the corresponding auxiliary groove.

[0011] Furthermore, each of the two sliders is provided with a limiting rod on its opposite side, and each limiting rod has a buffer groove at its end, with a rubber block embedded in each buffer groove.

[0012] This utility model has the following beneficial effects:

[0013] (1) This utility model drives the slider to overcome the spring tension and move inward by pressing the exposed sliding rods on both sides of the frame, thereby causing the fixing block to come out of the mounting hole. At this time, the housing can be removed vertically. During installation, the arc-shaped guide surface of the frame is aligned with the inclined surface of the fixing block and pressed down. The inclined surfaces interact to automatically compress the spring. When the mounting hole is aligned with the fixing block, the spring pushes the fixing block to lock instantly. The connection structure solves the inherent defects of the traditional snap-fit ​​method. It adopts a sliding unlocking mechanism to replace the rigid buckle. Automatic alignment is achieved through the inclined surface guide, so that the disassembly process does not require precise angle alignment. The spring-pre-tightened slider evenly distributes the operating force, avoids local stress concentration, and eliminates the risk of buckle breakage during disassembly. The entire disassembly and assembly process can be completed with only simple push and pull actions, which significantly improves the convenience and reliability of maintenance, while ensuring the stability of the connection structure in long-term use.

[0014] (2) When the sliders of this utility model move towards each other, the limiting rod moves synchronously with the slider. The rubber block at its end contacts first when the spring is close to the maximum compression. It absorbs the impact energy through elastic deformation. As the pressure increases, the limiting rod makes hard contact after the rubber block is fully compressed, forming a rigid stop, which effectively prevents the spring from overload and failing. At the same time, the damping characteristics of the rubber block eliminate the noise and wear caused by the direct collision of the limiting rod.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection structure, shell, and connecting rod structure.

[0019] Figure 3 This is a cross-sectional view of the connecting structure, shell, and connecting rod structure;

[0020] Figure 4 Exploded view of the connecting structure;

[0021] The attached diagram lists the components represented by each number as follows:

[0022] In the diagram: 1. Oil cup; 2. Mounting rod; 3. Oil pump bracket; 4. Connecting pipeline; 5. Connecting structure; 501. Housing; 502. Cover plate; 503. Slider; 504. Spring; 505. Fixing block; 506. Mounting port; 507. Slide rod; 508. Inclined surface; 509. Auxiliary block; 5010. Limiting rod; 5011. Rubber block; 6. Housing; 601. Frame; 602. Mounting hole; 603. Notch; 604. Arc-shaped guide surface; 7. Connecting rod; 8. Oil level sensor. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0024] Please see Figures 1-4As shown, this utility model is a vehicle oil pump assembly, including an oil cup 1. An electric oil pump is installed inside the oil cup 1. A mounting rod 2 is slidably connected to the upper end of the oil cup 1. An oil pump bracket 3 is installed at the upper end of the mounting rod 2. A connecting pipe 4 is inserted into the oil outlet of the electric oil pump. The other end of the connecting pipe 4 is inserted into the oil inlet of the oil pump bracket 3. A housing 6 is installed on the outside of the oil cup 1 through a connecting structure 5. A connecting rod 7 is installed on one side of the housing 6. An oil level sensor 8 is installed at the end of the connecting rod 7. The connecting structure 5 includes a housing 501. It is fixed to the outside of the oil cup 1, the cover plate 502 is fixed to one side of the outer shell 501, and a through opening is opened in the middle. Two sliders 503 are slidably disposed inside the outer shell 501. A spring 504 is connected to the outside of the two sliders 503 at both ends respectively. Two fixing blocks 505 are fixed to the upper end of the corresponding sliders 503 respectively and slidably fitted in the through opening. A frame 601 is fixed on the other side of the shell 6. Both ends of the frame 601 are provided with mounting holes 602. The two fixing blocks 505 are fitted in the corresponding mounting holes 602.

[0025] The outer casing 501 has mounting holes 506 at both ends, and two sliding rods 507 slide through the corresponding mounting holes 506 respectively. One end of each sliding rod 507 is fixedly connected to the outside of the corresponding slider 503.

[0026] The lower end of the frame 601 has a notch 603. When the fixing block 505 is inserted into the mounting hole 602, the outer end of the slide rod 507 is located inside the notch 603.

[0027] The lower end of the frame 601 is provided with an arc-shaped guide surface 604, and the outer side of the fixing block 505 is provided with an inclined surface 508, which slides in conjunction with the arc-shaped guide surface 604.

[0028] In this process, by pressing the exposed sliding rods 507 on both sides of the frame 601, the slider 503 is driven to move inward against the tension of the spring 504, causing the fixing block 505 to come out of the mounting hole 602. At this time, the housing 6 can be removed vertically. During installation, the arc-shaped guide surface 604 of the frame 601 is aligned with the inclined surface 508 of the fixing block 505 and pressed down. The inclined surfaces 508 interact to automatically compress the spring 504. When the mounting hole 602 is aligned with the fixing block 505, the spring 504 pushes the fixing block 505 to lock instantly. The connection structure 5 solves the inherent defects of the traditional snap-fit ​​method. It adopts a sliding unlocking mechanism to replace the rigid buckle. Automatic alignment is achieved through the guide of the inclined surface 508, so that the disassembly process does not require precise angle alignment. The slider 503, which is pre-tightened by the spring 504, evenly distributes the operating force, avoids local stress concentration, and eliminates the risk of buckle breakage during disassembly. The entire disassembly and assembly process can be completed with only a simple push and pull action, which significantly improves the convenience and reliability of maintenance, while ensuring the stability of the connection structure 5 in long-term use.

[0029] An auxiliary groove is provided on the inner wall of the outer shell 501, and an auxiliary block 509 is fixed on the outer side of each slider 503. Each auxiliary block 509 is slidably embedded in the corresponding auxiliary groove.

[0030] The design of the auxiliary block 509 and the auxiliary groove forms the guide for the movement of the slider 503. The sliding trajectory of the auxiliary block 509 along the auxiliary groove strictly limits the movement path of the slider 503, so that it always maintains linear movement and does not have radial deviation. When the disassembly operation pushes the slide bar 507, the stable sliding of the auxiliary block 509 in the auxiliary groove makes the force completely converted into axial displacement, eliminating the torsional effect of the lateral component force on the structure, so as to maintain stable connection accuracy under frequent disassembly and assembly conditions.

[0031] Each of the two sliders 503 has a limiting rod 5010 on its opposite side. Each limiting rod 5010 has a buffer groove at its end, and a rubber block 5011 is embedded in each buffer groove.

[0032] When the sliders 503 move towards each other, the limiting rod 5010 moves synchronously with the sliders 503. The rubber block 5011 at its end makes contact first when the spring 504 is close to the maximum compression. It absorbs the impact energy through elastic deformation. As the pressure increases, the rubber block 5011 is fully compressed and the limiting rod 5010 makes hard contact, forming a rigid stop. This effectively prevents the spring 504 from overloading and failing. At the same time, the damping characteristics of the rubber block 5011 eliminate the noise and wear caused by the direct collision of the limiting rod 5010.

[0033] In use, by pressing the exposed sliding rods 507 on both sides of the frame 601, the slider 503 is driven to move inward against the tension of the spring 504, causing the fixing block 505 to come out of the mounting hole 602. At this time, the housing 6 can be removed vertically. During installation, the arc-shaped guide surface 604 of the frame 601 is aligned with the inclined surface 508 of the fixing block 505 and pressed down. The inclined surfaces 508 interact to automatically compress the spring 504. When the mounting hole 602 is aligned with the fixing block 505, the spring 504 pushes the fixing block 505 to lock instantly. The connection structure 5 solves the inherent defects of the traditional snap-fit ​​method. It adopts a sliding unlocking mechanism to replace the rigid buckle. Automatic alignment is achieved through the guide of the inclined surface 508, so that the disassembly process does not require precise angle alignment. The slider 503, which is pre-tightened by the spring 504, evenly distributes the operating force, avoids local stress concentration, and eliminates the risk of buckle breakage during disassembly. The entire disassembly and assembly process can be completed with only a simple push and pull action, which significantly improves the convenience and reliability of maintenance, while ensuring the stability of the connection structure 5 in long-term use.

[0034] When the disassembly operation pushes the slide bar 507, the stable sliding of the auxiliary block 509 in the auxiliary groove completely converts the force into axial displacement, eliminating the torsional effect of the lateral component force on the structure. Thus, it can maintain stable connection accuracy even under frequent disassembly and assembly conditions. At the same time, when the sliders 503 move towards each other, the limit rod 5010 moves synchronously with the sliders 503. The rubber block 5011 at its end makes contact first when the spring 504 approaches its maximum compression. It absorbs the impact energy through elastic deformation. As the pressure increases, the rubber block 5011 is fully compressed and the limit rod 5010 makes hard contact, forming a rigid stop. This effectively prevents the spring 504 from overloading and failing. The damping characteristics of the rubber block 5011 eliminate the noise and wear caused by the direct collision of the limit rod 5010.

[0035] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A vehicle oil pump assembly, comprising an oil cup (1), wherein an electric oil pump is installed inside the oil cup (1), a mounting rod (2) is slidably connected to the upper end of the oil cup (1), an oil pump bracket (3) is mounted on the upper end of the mounting rod (2), a connecting pipe (4) is inserted into the oil outlet of the electric oil pump, and the other end of the connecting pipe (4) is inserted into the oil inlet of the oil pump bracket (3), characterized in that: A housing (6) is installed on the outside of the oil cup (1) via a connecting structure (5). A connecting rod (7) is installed on one side of the housing (6), and an oil level sensor (8) is installed at the end of the connecting rod (7). The connection structure (5) includes: The outer casing (501) is fixed to the outside of the oil cup (1); A cover plate (502) is fixed to one side of the outer casing (501) and has an opening in the middle; Two sliders (503) are slidably disposed inside the housing (501); A spring (504) has its two ends connected to the outer sides of two sliders (503); Two fixed blocks (505) are fixed to the upper end of the corresponding slider (503) and are slidably fitted into the through-hole; A frame (601) is fixed on the other side of the housing (6). Both ends of the frame (601) are provided with mounting holes (602), and two fixing blocks (505) are installed in the corresponding mounting holes (602).

2. A pump assembly according to claim 1, wherein: The outer casing (501) has mounting ports (506) at both ends. Two slide rods (507) slide through the corresponding mounting openings (506) respectively, and one end of each slide rod (507) is fixedly connected to the outside of the corresponding slider (503).

3. A vehicle oil pump assembly as set forth in claim 2, characterized in that: The lower end of the frame (601) has a notch (603). When the fixing block (505) is inserted into the mounting hole (602), the outer end of the slide rod (507) is located in the notch (603).

4. A pump assembly according to claim 1, wherein: The lower end of the frame (601) is provided with an arc-shaped guide surface (604), and the outer side of the fixing block (505) is provided with an inclined surface (508), and the inclined surface (508) slides in cooperation with the arc-shaped guide surface (604).

5. A pump assembly according to claim 1, wherein: The inner wall of the outer shell (501) is provided with an auxiliary groove, and an auxiliary block (509) is fixed on the outer side of each slider (503). Each auxiliary block (509) is slidably embedded in the corresponding auxiliary groove.

6. A pump assembly according to claim 1 wherein: Each of the two sliders (503) has a limiting rod (5010) on its opposite side. Each limiting rod (5010) has a buffer groove at its end, and each buffer groove has a rubber block (5011) embedded in it.

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