Built-in fuel pump structure
By designing a built-in fuel pump structure, the problem of high space occupancy caused by the separate installation of existing fuel pumps and oil level sensors is solved, and a tight integration and adaptive design is achieved, which improves the stability and earthquake resistance of the equipment.
Patent Information
- Application Number
- CN202520212241.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2035-02-11
AI Technical Summary
Existing fuel pumps and oil level sensors are usually installed separately, resulting in high space occupancy, especially in models with smaller space, where there is a problem of limited layout.
A built-in fuel pump structure is designed, including a pump body assembly and an oil level sensor assembly. The pump body assembly consists of an upper bracket, a lower bracket and a telescopic support rod. The oil level sensor assembly is installed on the upper bracket and the fuel pump is installed on the lower bracket. The telescopic support rod can adjust the relative distance between the upper and lower brackets, adapting to fuel tanks of different models and sizes.
It realizes the tight integration of the pump body assembly and the oil level sensor assembly, reduces the space occupied by the fuel tank, is suitable for oil tanks of different models and sizes, and improves the stability and shock resistance of the equipment through the design of spring sleeves.
Smart Images
Figure CN222650084U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power components, in particular to a built-in fuel pump structure. Background Art
[0002] The fuel pump is an essential and important component of the fuel system. The fuel pump is usually equipped with an oil level sensor to detect and monitor the oil level. The oil level sensor is driven by a float to move the potentiometer contact, and the resistance value is changed to achieve the purpose of detecting the oil level. The oil level sensor is a component that monitors the oil level in the oil tank of the internal combustion engine in real time. It is an important part of the fuel pump. At present, some fuel pumps and oil level sensors on the market are installed separately and independently, that is, they are installed on the fuel tank. This structure makes the oil level sensor unaffected by the fuel pump, but it has the following disadvantages, namely, the space occupancy rate is high, especially for models with smaller space, the space layout is limited, therefore, an integrated fuel pump structure is urgently needed. Utility Model Content
[0003] The utility model aims to provide a built-in fuel pump structure designed to solve the deficiencies of the above-mentioned technology.
[0004] The utility model designs a built-in fuel pump structure, including a pump body assembly and an oil level sensor assembly, the pump body assembly includes a fuel pump, an upper bracket, a lower bracket and a support rod, the upper bracket includes two plate structures fixedly connected to each other, the oil level sensor assembly is installed on one of the plate structures, the fuel pump is installed on the lower bracket, the support rod is a telescopic rod, the fixed end of the support rod is connected to the lower bracket, the other plate structure of the upper bracket is connected to the telescopic end of the support rod, the top end of the telescopic end of the support rod is provided with a cover body, the cover body is provided with an oil outlet nozzle, the fuel pump is connected to an oil supply pipeline, and the other end of the oil supply pipeline is connected to the oil outlet nozzle on the cover body.
[0005] Preferably, there are two support rods, which are arranged in parallel between the upper bracket and the lower bracket.
[0006] Further optimization, the support rod sleeve is provided with a spring, one end of the spring abuts against the upper bracket, and the other end abuts against the lower bracket.
[0007] Further optimized, the outer wall of the support rod is provided with a first annular groove at both ends of the upper bracket, and the outer wall of the support rod is provided with a second annular groove at the bottom end of the lower bracket, and open retaining rings are provided in the first annular groove and the second annular groove.
[0008] Further optimization, the oil level sensor assembly includes a base, a turntable, a resistor, a float and a float rod, the base is installed on the upper bracket, the turntable is rotatably connected to the base, the resistor is installed in the turntable, one end of the float rod is rotatably connected to the base through a rotating shaft, the float rod is connected to the turntable so that the float rod drives the turntable to rotate, and the other end of the float rod is connected to the float.
[0009] Further optimized, the base is provided with a first snap-in protrusion, and the upper bracket is provided with a first snap-in groove, and a snap-in connection is formed by the first snap-in protrusion and the first snap-in groove to connect the base to the upper bracket.
[0010] Further optimization is that a base is provided at the bottom of the lower bracket, a mounting groove is provided at the top of the base, the lower bracket is inserted into the mounting groove, a supporting foot is formed at the bottom of the base, and an elastic foot pad is provided at the bottom of the supporting foot.
[0011] Further optimization is that an integrated fixing seat is provided on the top of the lower bracket, the fixing seat is located above the fuel pump, and a limiting hole is opened in the center of the fixing seat for the oil supply pipeline to pass through and form a limit.
[0012] Further optimization is that a protrusion is provided on the edge of the top of the base, and a limiting groove is provided on the outer peripheral wall of the lower bracket for inserting the protrusion, a second snap protrusion is provided at the bottom of the limiting groove, and a second snap groove is provided on the protrusion. When the protrusion is inserted into the limiting groove, a snap connection is formed by the second snap protrusion and the second snap groove to connect the base to the lower bracket.
[0013] Preferably, the lower bracket is provided with a filter joint for connecting to the fuel tank at the bottom of the fuel pump, and a filter net is provided on the filter joint.
[0014] The technical effect of the utility model is that the pump body assembly and the oil level sensor assembly are both installed in the fuel tank, the pump body assembly includes an upper bracket, a lower bracket and a fuel pump, the oil level sensor assembly is installed on the upper bracket, the fuel pump is installed on the lower bracket, and a retractable support rod is provided between the upper bracket and the lower bracket, so that the relative distance between the upper bracket and the lower bracket can be adjusted, that is, the height position of the oil level sensor is adjustable, so that it can be suitable for fuel tanks of different models and sizes; at the same time, in conjunction with the rotatable float rod in the oil level sensor assembly, the stroke of the float is maximized, that is, the highest and lowest points of the oil level can be reached; the pump body assembly and the oil level sensor assembly are designed as an integrated unit, which not only occupies a small space in the fuel tank, is tightly arranged, but also has good stability; the support rod sleeve is provided with a spring, and the spring is located between the upper bracket and the lower bracket, so that the upper bracket forms a certain elastic buffer relative to the lower bracket, so that under extreme vibration conditions, the vehicle can avoid damage to the oil level sensor assembly of the upper bracket due to hard collision. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is the overall structure diagram of the utility model (one of the springs is omitted).
[0016] Figure 2 This is another perspective view of the overall structure of the utility model (the oil supply pipeline is omitted).
[0017] Figure 3 It is an exploded view of the structure between the turntable and the base in the utility model (the oil supply pipeline and one of the springs are omitted).
[0018] Figure 4 yes Figure 3 Enlarged view of point A in the middle.
[0019] In the figure: 1, pump body assembly; 11, upper bracket; 111, first through hole; 112, first buckle groove; 114, plate structure; 12, lower bracket; 121, mounting cavity; 122, opening; 123, second through hole; 124, mounting groove; 125, fixing seat; 126, limiting hole; 127, limiting groove; 128, second buckle protrusion; 129, filter connector; 1210, filter screen; 13, fuel pump; 131, terminal; 132, oil outlet; 14, support rod; 141, first annular groove; 14 2. Second annular groove; 15. Cover; 16. Junction box; 17. Regulating valve; 18. Oil supply pipeline; 19. Oil outlet nozzle; 110. Spring; 113. Opening retaining ring; 2. Oil level sensor assembly; 21. Base; 211. First snap-on protrusion; 22. Turntable; 23. Resistor; 24. Float; 25. Float rod; 3. Bottom support; 31. Support foot; 32. Elastic foot pad; 33. Bump; 34. Second snap-on groove; 35. Limit stopper; 36. Limit protrusion; 37. First terminal; 38. Second terminal. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.
[0021] like Figure 1 and Figure 2As shown, the utility model includes a pump body assembly 1 and an oil level sensor assembly 2, both of which are installed in a fuel tank, the fuel tank having a fuel tank port, the pump body assembly 1 includes a bracket and a fuel pump 13, the bracket includes an upper bracket 11, a lower bracket 12 and a support rod 14, the upper bracket 11 and the lower bracket 12 are distributed up and down, in this embodiment, the upper bracket 11 is two plate structures 114 fixedly connected to each other, the oil level sensor assembly 2 is installed on one of the plate structures 114 of the upper bracket 11, the fuel pump 13 is installed on the lower bracket 12, and the other is installed on the lower bracket 12. An integrated hole column is provided on the outer plate structure 114, and the lower bracket 12 is a seat structure. The seat structure has an installation cavity 121 inside, and the fuel pump 13 is located in the installation cavity 121. The upper and lower ends of the seat structure have openings 122. The terminal 131 and the oil outlet 132 of the fuel pump 13 are exposed at the opening 122 at the upper end of the seat structure, and the opening 122 at the lower end of the seat structure is provided with a base 3, and the top of the base 3 is provided with a mounting groove 124. The lower bracket 12 is inserted into the mounting groove 124, and the bottom of the base 3 is formed with a supporting foot 31.
[0022] It should be noted that screw holes are provided on the plate structure 114 of the upper bracket 11, so that the plate structure 114 can be connected to the inner wall of the oil tank through fasteners, so that the upper bracket 11 is fixed to the oil tank to stably install the upper bracket 11.
[0023] An integrated protrusion 33 is provided on the edge of the top of the base 3, and a limiting groove 127 is provided on the outer peripheral wall of the lower bracket 12. The limiting groove 127 is distributed along the axial extension of the installation cavity 121. The protrusion 33 is inserted into the limiting groove 127. A second snap-fit protrusion 128 is provided at the bottom of the limiting groove 127. A second snap-fit groove 34 is provided on the protrusion 33. When the protrusion 33 is inserted into the limiting groove 127, a snap-fit connection is formed between the second snap-fit protrusion 128 and the second snap-fit groove 34 so that the base 3 can be detachably connected to the lower bracket 12, which is convenient for loading and unloading the fuel pump 13.
[0024] Furthermore, in this embodiment, there are at least two protrusions 33 , which are evenly distributed in an annular shape along the outer circumference of the base 3 . Accordingly, there are two limiting grooves 127 , two second snap-fit protrusions 128 , and two second snap-fit grooves 34 .
[0025] The support rod 14 is a telescopic rod, the fixed end of the support rod 14 is connected to the lower bracket 12, the upper bracket 11 is connected to the telescopic end of the support rod 14, another plate structure 114 of the upper bracket 11 has a hole column, a first through hole 111 is opened in the hole column, the telescopic end of the support rod 14 passes through the first through hole 111 of the upper bracket 11, so that the upper bracket 11 is sleeved on the support rod 14, the lower bracket 12 is provided with a second through hole 123, the fixed end of the support rod 14 passes through the second through hole 123 of the lower bracket 12, so that the lower bracket 11 is connected to the support rod 14. The bracket 12 is sleeved on the support rod 14; a first annular groove 141 is provided on the outer periphery of the telescopic end of the support rod 14, and there are two first annular grooves 141, which are respectively arranged close to the upper and lower ends of the first through hole 111, and a second annular groove 142 is provided on the outer periphery of the bottom end of the fixed end of the support rod 14; open retaining rings 113 are provided in the first annular groove 141 and the second annular groove 142, which are respectively used to fix the upper bracket 11 and the lower bracket 12, so that the upper bracket 11 and the lower bracket 12 are respectively fixedly connected to the support rod 14.
[0026] like Figure 3 and Figure 4 As shown, the oil level sensor assembly 2 includes a base 21, a rotating disk 22, a resistor 23, a float 24 and a float rod 25. The base 21 is installed on the upper bracket 11, the rotating disk 22 is rotatably connected to the base 21, the resistor 23 is installed in the rotating disk 22, one end of the float rod 25 is rotatably connected to the base 21 through a rotating shaft, and the float rod 25 is fixedly connected to the rotating disk 22 so that the float rod 25 drives the rotating disk 22 to rotate. The other end of the float rod 25 is connected to the float 24. The base 21 is provided with two first terminals. 37, the two first terminals 37 are connected to different positions of the resistor 23 through wires, and the resistance value of the resistor 23 gradually increases or decreases from one side to the other side. When the resistor 23 rotates with the turntable 22, the two first terminals 37 contact different positions of the resistor 23. As the turntable 22 rotates, the resistance of the resistor 23 between the contact positions of the two first terminals 37 also gradually changes, so that the height of the float 24 is calculated by measuring the change in resistance value or current to indicate the amount of oil in the tank.
[0027] Furthermore, two limit stops 35 are provided on the base 21, and the two limit stops 35 are arranged along the rotation direction of the turntable 22. A limit protrusion 36 is provided on the turntable 22, and the limit protrusion 36 rotates with the turntable 22. The limit protrusion 36 rotates between the two limit stops 35. The limit stops 35 limit the limit protrusion 36 so that the limit protrusion 36 can only rotate back and forth between the two limit stops 35, thereby achieving the purpose of limiting the rotation direction and angle of the turntable 22.
[0028] Furthermore, the base 21 is provided with a first snap protrusion 211, and the upper bracket 11 is provided with a first snap groove 112. The first snap protrusion 211 and the first snap groove 112 form a snap connection to connect the base 21 to the upper bracket 11, that is, the base 21 is detachably connected to the upper bracket 11, which facilitates the loading and unloading of the base 21.
[0029] A cover 15 is provided at the top of the telescopic end of the support rod 14, and a sealing ring is provided around the cover 15. The cover 15 is tightly matched with the fuel tank port of the fuel tank to prevent fuel leakage. A junction box 16, a regulating valve 17 and a fuel supply pipeline 18 are provided on the cover 15. A second terminal 38 is correspondingly provided on the junction box 16. The first terminal 37 and the second terminal 38 are connected by a wiring harness to form a circuit connection, so that the junction box 16 is connected to the fuel level sensor assembly 2. The junction box 16 outputs the resistance signal of the fuel level sensor assembly 2. The wiring harness in the attached figure Not shown, one end of the fuel supply pipe 18 is connected to the fuel pump 13, the fuel outlet 132 of the fuel pump 13 is located at the top, the end of the fuel supply pipe 18 is connected to the fuel outlet 132 of the fuel pump 13, and the other end of the fuel supply pipe 18 is installed on the cover body 15 as an oil outlet nozzle 19. The fuel pump 13 sucks the fuel from the fuel tank, pressurizes it and delivers it to the fuel supply pipe 18 to establish a certain fuel pressure for the engine to start and run. The regulating valve 17 is connected to the oil outlet nozzle 19. Under the action of the regulating valve 17, the oil pressure in the fuel supply pipe 18 is kept constant.
[0030] Furthermore, there are two support rods 14 , which are arranged in parallel between the upper bracket 11 and the lower bracket 12 , so that the upper bracket 11 and the lower bracket 12 can be more stably connected to the support rods 14 .
[0031] Furthermore, a spring 110 is disposed on the outer sleeve of the support rod 14, one end of the spring 110 abuts against the upper bracket 11, and the other end abuts against the lower bracket 12, so that the upper bracket 11 can form a certain buffer relative to the support rod 14, so that when the vehicle is in an extreme vibration condition, the oil level sensor assembly 2 is prevented from being damaged due to a hard collision. Figure 1 and Figure 3 In order to facilitate intuitive display of the support rods 14, the spring 110 on one of the support rods 14 is omitted.
[0032] Furthermore, an elastic foot pad 32, such as a rubber foot pad, is provided at the bottom of the support foot 31. Usually, the entire fuel pump structure is installed in the fuel tank, and the support foot 31 contacts the bottom surface of the fuel tank. The elastic foot pad 32 plays an elastic buffering role for the entire fuel pump structure.
[0033] Furthermore, an integrated fixing seat 125 is provided at the top of the lower bracket 12, and the fixing seat 125 extends from the top of the lower bracket 12 to above the fuel pump 13. A limiting hole 126 is provided in the center of the fixing seat 125. The oil supply pipe 18 passes through the limiting hole 126 and is connected to the fuel pump 13. At the same time, the limiting hole 126 limits the oil supply pipe 18 to prevent the oil supply pipe 18 from being separated from the fuel pump 13 when the vehicle vibrates.
[0034] Furthermore, the support rod 14 is made of stainless steel to ensure the support strength of the support rod 14 .
[0035] The fuel pump 13 has an oil inlet at the bottom, and the lower bracket 12 is provided with a filter joint 129 at the oil inlet. The oil inlet is connected to the fuel tank through the filter joint 129. A filter net 1210 is provided on the filter joint 129. The fuel in the fuel tank enters the fuel pump 13 after being filtered through the filter net 1210.
[0036] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.
Claims
1. A built-in fuel pump structure, characterized in that: The invention comprises a pump body assembly (1) and an oil level sensor assembly (2), wherein the pump body assembly (1) comprises a fuel pump (13), an upper bracket (11), a lower bracket (12) and a support rod (14), wherein the upper bracket (11) comprises two plate structures (114) fixedly connected to each other, the oil level sensor assembly (2) is mounted on one of the plate structures (114), the fuel pump (13) is mounted on the lower bracket (12), and the support rod (14) is a telescopic rod. The fixed end of the support rod (14) is connected to the lower bracket (12); another plate structure (114) of the upper bracket (11) is connected to the telescopic end of the support rod (14); a cover body (15) is provided at the top end of the telescopic end of the support rod (14); an oil outlet nozzle (19) is provided on the cover body (15); a fuel supply pipeline (18) is connected to the fuel pump (13); the other end of the fuel supply pipeline (18) is connected to the oil outlet nozzle (19) on the cover body (15).
2. A built-in fuel pump structure according to claim 1, characterized in that: There are two support rods (14), which are arranged in parallel between the upper support (11) and the lower support (12).
3. A built-in fuel pump structure according to claim 2, characterized in that: The support rod (14) is sleeved with a spring (110), one end of the spring (110) abuts against the upper bracket (11), and the other end of the spring (110) abuts against the lower bracket (12).
4. A built-in fuel pump structure according to claim 3, characterized in that: The outer wall of the support rod (14) is provided with a first annular groove (141) at both ends of the upper bracket (11), and the outer wall of the support rod (14) is provided with a second annular groove (142) at the bottom end of the lower bracket (12), and an open retaining ring (113) is provided in both the first annular groove (141) and the second annular groove (142).
5. The internal fuel pump structure according to claim 2, characterized in that: The oil level sensor assembly (2) comprises a base (21), a rotating disk (22), a resistor (23), a float (24) and a float rod (25); the base (21) is mounted on an upper bracket (11); the rotating disk (22) is rotatably connected to the base (21); the resistor (23) is mounted in the rotating disk (22); one end of the float rod (25) is rotatably connected to the base (21) via a rotating shaft; the float rod (25) is connected to the rotating disk (22) so that the float rod (25) drives the rotating disk (22) to rotate; and the other end of the float rod (25) is connected to the float (24).
6. The internal fuel pump structure according to claim 5, characterized in that: The base (21) is provided with a first snap-fit protrusion (211), and the upper bracket (11) is provided with a first snap-fit groove (112); a snap-fit connection is formed by the first snap-fit protrusion (211) and the first snap-fit groove (112) so that the base (21) is connected to the upper bracket (11).
7. The internal fuel pump structure according to claim 2, characterized in that: A base bracket (3) is provided at the bottom of the lower bracket (12), a mounting groove (124) is provided at the top of the base bracket (3), the lower bracket (12) is inserted into the mounting groove (124), a supporting foot (31) is formed at the bottom of the base bracket (3), and an elastic foot pad (32) is provided at the bottom of the supporting foot (31).
8. The internal fuel pump structure according to claim 7, characterized in that: An integrated fixing seat (125) is provided on the top of the lower bracket (12), and the fixing seat (125) is located above the fuel pump (13). A limiting hole (126) is provided in the center of the fixing seat (125) for the fuel supply pipeline (18) to pass through and form a limiting position.
9. The internal fuel pump structure according to claim 7, characterized in that: A protrusion (33) is provided at the edge of the top of the base bracket (3); a limiting groove (127) for inserting the protrusion (33) is provided on the outer peripheral wall of the lower bracket (12); a second snap-fit protrusion (128) is provided at the bottom of the limiting groove (127); a second snap-fit groove (34) is provided on the protrusion (33); when the protrusion (33) is inserted into the limiting groove (127), a snap-fit connection is formed by the second snap-fit protrusion (128) and the second snap-fit groove (34) so that the base bracket (3) is connected to the lower bracket (12).
10. The internal fuel pump structure according to claim 1, characterized in that: The lower bracket (12) is provided with a filter joint (129) for connecting to a fuel tank at the bottom of the fuel pump (13), and a filter net (1210) is provided on the filter joint (129).