A new fuel pump support assembly oil outlet double injection oil return device component

Abstract

The application relates to a novel fuel pump support assembly oil outlet double-injection oil return device component, which comprises an oil outlet double-injection oil return device body, a pump core support and an oil storage bucket assembly. The oil outlet double-injection oil return device body is assembled with the pump core support and the oil storage bucket assembly. The oil outlet double-injection oil return device body comprises a bellows, a steel ball, an oil return plastic seat, a plastic nozzle, an injection plastic seat, a plastic oil pipe, an O-shaped sealing ring and a plug cover. The oil outlet double-injection oil return device component is compact in structure, reasonable in design, short in forming cycle, easy to control in size, high in plastic deformation, simultaneously integrated with siphon and injection oil return functions and high in universality.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fuel pump components, in particular to a novel oil outlet double injection oil return device assembly. BACKGROUND

[0002] The automobile fuel pump assembly is one of the basic components of the automobile fuel injection system, and the existing fuel pump assembly is composed of a top cover assembly, a corrugated pipe, an oil outlet double injection oil return device body, an oil storage bucket assembly, a pump core support, a support rod, a support spring, a wire harness assembly and a siphon pipe assembly and other components, which functions to suck fuel from the fuel tank, the fuel pressure regulating valve synchronously cooperates to establish a certain fuel pressure, and the fuel is delivered to the fuel supply pipeline after being pressurized to enable the engine to work normally.

[0003] The function of the oil outlet double injection oil return device body in the fuel pump assembly is to push the pipeline fuel to a small injection hole with a sharply reduced diameter, and the injection hole is opposite to the oil return port, and a spray cavity is provided between the injection hole and the oil return port, one side of the spray cavity is communicated with the siphon pipe, and the high-pressure flow of the extremely fast injection forms a siphon effect to drive the fuel medium in the auxiliary fuel tank to enter the main tank more effectively and quickly, meeting the engine fuel supply demand.

[0004] The existing oil outlet double injection oil return device body on the market has a single function, only realizing single pipe siphon injection, and cannot meet the requirements of both injection oil return and siphon oil return, and impurities are easy to block the flow channel of the siphon when the fuel tank environment is poor, thereby causing poor siphon effect, low oil return efficiency, insufficient fuel supply of the main tank fuel pump, and isolated air in the pipeline, resulting in engine power decline or even non-working. Most of the structural designs are complex, the product has low universality, is not convenient to maintain, and other components are easy to be damaged during maintenance and disassembly, so that the use requirements of customers cannot be met. SUMMARY

[0005] In order to overcome the deficiencies of the background art, the present application provides a novel fuel pump support assembly oil outlet double injection oil return device assembly, which can realize the functions of siphon auxiliary tank fuel medium and injection main tank fuel medium oil return by increasing the oil outlet double injection oil return device body. The oil outlet double injection oil return device body has compact structure, reasonable design, short forming cycle, easy size control, high plastic deformation, integrated siphon oil return and injection oil return functions, high universality, meets the production and assembly requirements, low requirement for worker's operation skill, easy to operate, easy to rework, high product qualification rate, and meets the working performance requirements of the product.

[0006] The technical scheme adopted by the present application is: a novel fuel pump support assembly oil outlet double-injection oil return device component. The plug cover is pressed into the injection plastic seat, the corrugated pipe connects the injection plastic seat and the plastic oil pipe, the plastic nozzle is aligned with the mounting groove of the injection plastic seat and is pressed in, the locking is achieved through the buckle and the slot, the steel ball is then pressed into the hole in the head of the plastic nozzle, the oil return plastic seat is then pushed through the L-shaped rib plate to align with the L-shaped groove on the injection plastic seat, the second limiting buckle on the plastic nozzle is connected and locked with the slot on the first oil outlet pipeline of the oil return plastic seat after assembly, and finally the O-shaped sealing ring is placed on the sealing groove of the second oil outlet pipeline of the oil return plastic seat, thereby completing the self-assembly of the oil outlet double-injection oil return device body, the plug cover and the steel ball ensure that the pipeline is blocked and sealed, and the connection parts of the plastic nozzle, the oil return plastic seat and the injection plastic seat are all in interference fit and sealing. The oil outlet double-injection oil return device body is installed in the corresponding hole of the oil storage bucket assembly through the drainage cavity pipe of the injection plastic seat and the second oil outlet pipeline of the oil return plastic seat, the O-shaped sealing ring on the oil return plastic seat ensures the sealing performance of the injection pipeline, the plastic oil pipe of the oil outlet double-injection oil return device body is arranged outside the oil storage bucket assembly, is positioned and installed through the circular groove, the limiting circular point and the guiding rib plate and the limiting installation groove, and then the two limiting circular points on the oil storage bucket assembly are flattened by using a tool to prevent the plastic oil pipe from falling off, the pump core support is then installed above the oil storage bucket assembly through the buckle connection, and the support oil outlet pipe on the pump core support is in interference fit with the oil inlet pipeline of the oil outlet double-injection oil return device body through the O-shaped sealing ring on the pump core support, thereby ensuring the sealing performance of the pipeline, and facilitating easy installation and maintenance.

[0007] In the above technical scheme, the present application provides a novel fuel pump support assembly oil outlet double-injection oil return device component, the oil outlet double-injection oil return device body is in a detachable assembly mode, the oil outlet double-injection oil return device body and the oil storage bucket assembly are in a non-detachable assembly mode, and the pump core support and the oil outlet double-injection oil return device body and the oil storage bucket assembly are in a detachable assembly mode, thereby realizing the oil return function of the siphon auxiliary fuel tank and the injection main fuel tank through the addition of the oil outlet double-injection oil return device body.

[0008] In order to facilitate the oil ejection double injection oil returner body itself is detachable assembly mode. The plug is pressed into the injection seat pipe hole of the injection plastic seat, the plug end diameter is interference fit with the injection seat pipe hole, which ensures that the pipeline is blocked and sealed. The plug end and the injection seat pipe hole opening are provided with process chamfer structure for easy installation. One end of the corrugated pipe is pressed on the injection plastic seat of the fir injection oil pipe, and the other end is pressed on the fir siphon oil pipe of the plastic oil pipe. The corrugated pipe connection can effectively ensure the pipeline sealing. The fir injection oil pipe has two fir-shaped hooks, and the hook outer diameter is interference fit with the corrugated pipe. The fir siphon oil pipe has two fir-shaped hooks, and the hook outer diameter is interference fit with the corrugated pipe. Align the plastic nozzle with the installation groove of the injection plastic seat and press it in. The plastic nozzle is limited to rotate and move by the two side thin ribs and the two side grooves of the installation groove. After assembly, the first limiting buckle of the plastic nozzle is connected and locked with the clamping groove on the installation groove of the injection plastic seat, which ensures the connection strength and limits the up and down movement. The outer diameter of the plastic nozzle is interference fit with the inner diameter of the installation groove bottom, which plays a sealing role. Then press the steel ball into the nozzle pipe hole of the plastic nozzle to ensure that the pipeline is blocked and sealed. Then push the oil return plastic seat through the L-shaped rib plate to the L-shaped groove on the injection plastic seat. The L-shaped rib plate thickness is interference fit with the L-shaped groove width, which ensures the connection strength. After assembly, the second limiting buckle on the plastic nozzle is connected and locked with the clamping groove on the first oil outlet pipeline of the oil return plastic seat. The L-shaped groove opening is provided with process chamfer structure for easy installation. Finally, put the O-shaped sealing ring into the sealing groove of the second oil outlet pipeline of the oil return plastic seat, and the installation of the oil ejection double injection oil returner body itself is completed. The sealing inlet end of the plastic nozzle is interference fit with the inner diameter of the first oil outlet pipeline of the oil return plastic seat, which plays a sealing role. The upper end of the sealing groove is provided with a process bevel structure for easy installation. When disassembling, only the reverse order can be removed, which is convenient and easy to install and maintain.

[0009] In order to ensure that the oil ejection double injection oil returner body and the oil storage bucket assembly are not detachable assembly mode, the pump core support and the oil ejection double injection oil returner body and the oil storage bucket assembly are detachable assembly mode.

[0010] The oil outlet double-injection oil returner body is installed on the corresponding hole position of the oil storage bucket assembly through the drainage cavity pipe of the injection plastic seat and the second oil outlet pipeline of the oil return plastic seat. After assembly, the baffle at the rear side of the second oil outlet pipeline of the oil return plastic seat abuts against the installation hole position of the oil storage bucket assembly, and the bucket support rib plate on the oil storage bucket assembly abuts against the injection plastic seat, limiting the downward movement of the oil outlet double-injection oil returner body. The outer diameter of the drainage cavity pipe of the oil outlet double-injection oil returner body and the inner diameter of the bucket limiting rib plate on the oil storage bucket assembly are in clearance fit, facilitating installation while ensuring installation firmness. The O-shaped sealing ring on the oil return plastic seat is in interference fit with the inner diameter of the installation hole position, ensuring the sealing performance of the injection pipeline. The plastic oil pipe of the oil outlet double-injection oil returner body is arranged outside the oil storage bucket assembly and is positioned and installed through the circular groove and the limiting circular point, the guide rib plate and the limiting installation groove. The inner diameter of the circular groove and the outer diameter of the limiting circular point are in transition fit, ensuring firmness. The width of the guide rib plate and the limiting installation groove are in clearance fit, facilitating installation. The circular groove and the guide rib plate are both provided with a process chamfer structure for facilitating installation. Then, the limiting circular points on both sides of the oil storage bucket assembly are flattened using a tool. After the limiting circular points are flattened, the outer diameter is increased, limiting the falling of the plastic oil pipe. The flattened limiting circular points cannot be restored, so the oil outlet double-injection oil returner body and the oil storage bucket assembly are in non-detachable assembly mode.

[0011] The pump core support is connected and installed on the upper side of the oil storage bucket assembly through the buckle and the clamping groove of the oil storage bucket assembly. The support oil outlet pipe on the pump core support is in inner diameter fit with the oil inlet pipeline of the oil outlet double-injection oil returner body, and the O-shaped sealing ring on the support oil outlet pipe is in interference fit, ensuring the sealing performance of the pipeline. After assembly, the oil inlet pipeline abuts against the support oil outlet pipe, limiting the upward movement of the oil outlet double-injection oil returner body. When disassembling and replacing the pump core support, the buckle locking of the pump core support and the oil storage bucket assembly is released through a tool, and the pump core support can be pushed upward and taken out. It is convenient, fast, easy to install and maintain.

[0012] In order to siphon the fuel medium of the auxiliary fuel tank and inject the fuel medium of the main fuel tank back to the oil function. The fuel medium flows out of the oil outlet pipe of the pump core support through the oil inlet pipe connected to the body of the oil outlet double injection back oil device, and flows downward. When the fuel medium flows downward, it is divided into two streams, one flowing into the first oil outlet pipe and the other flowing into the second oil outlet pipe. The first oil outlet pipe pushes the fuel medium to the plastic nozzle, and the fuel medium is injected through a sharply reduced diameter injection hole of the plastic nozzle. The injection hole is opposite to the drainage cavity pipe, and a siphon cavity is arranged between the injection hole and the drainage cavity pipe. One side of the injection cavity is connected to the siphon pipe, and the siphon pipe is connected to the plastic oil pipe of the body of the oil outlet double injection back oil device. The plastic oil pipe is connected to the auxiliary fuel tank through the oil pipe. The high-pressure flow of the rapid injection forms a siphon effect, so that the fuel medium in the auxiliary fuel tank is more effectively and quickly introduced into the main fuel tank. The second oil outlet pipe flows downward through the oil storage bucket assembly, changes direction upward through the pipeline of the oil storage bucket assembly, and pushes the fuel medium to a sharply reduced diameter injection hole. The injection hole is opposite to the oil return port, and a injection cavity is arranged between the injection hole and the oil return port. The bottom of the injection cavity is connected to the outside of the oil storage bucket assembly. The high-pressure flow of the rapid injection forms a siphon effect, so that the fuel medium in the main fuel tank is more effectively and quickly returned. The siphon and injection double back oil function meets the engine oil supply demand.

[0013] Preferably, because the siphon pipe is sealed and the highest oil outlet is located at the bottom of the drainage cavity pipe, when the fuel medium in the auxiliary fuel tank is less than that in the main fuel tank and the fuel pump support assembly is not working, the fuel medium will flow back from the main fuel tank to the auxiliary fuel tank due to the height difference of the oil level, until the oil level in the main fuel tank is consistent with that in the auxiliary fuel tank or the fuel medium surface is lower than the highest oil outlet. Therefore, a relief hole is arranged below the tree injection oil pipe on the injection plastic seat. At this time, the relief hole is the highest oil outlet. When the fuel medium in the main fuel tank flows back to the relief hole position, the pipeline is no longer sealed, that is, the backflow phenomenon will not occur. The design is simple.

[0014] Preferably, the body of the oil outlet double injection back oil device can also cancel the siphon function according to the demand, and only play the role of injection back oil. Replace the core support on the back oil plastic seat mold, and block the first oil outlet pipe. At this time, the body of the oil outlet double injection back oil device has no siphon function, and only plays the role of injection back oil. The design is simple and has strong universal performance.

[0015] Preferably, the materials of the back oil plastic seat, the injection plastic seat, the plastic oil pipe, the plug cover and the plastic nozzle of the body of the oil outlet double injection back oil device are POM copolymer formaldehyde materials, which have good dimensional stability, high surface hardness, self-lubricating property, friction property and excellent electrical insulation. It can resist methanol gasoline, ethanol gasoline, ordinary gasoline and other conventional fuel media, and maintain good chemical stability at high temperature.

[0016] The content of the scheme is further described in detail:

[0017] 1. The dual-jet oil return unit is assembled detachably; the unit and the oil reservoir are non-detachable, while the pump core bracket is detachably assembled from the unit and the reservoir. By adding the dual-jet oil return unit, the existing fuel pump bracket assembly can siphon fuel from the auxiliary tank and inject fuel from the main tank.

[0018] 2. To facilitate oil discharge, the double-jet oil return device body itself is detachable. Press the plugging cover into the ejector pipe hole of the ejector plastic seat. The outer diameter of the plugging cover end is φ6.2mm and the inner diameter of the ejector pipe hole is φ6mm, which is an interference fit to ensure that the pipeline is blocked and sealed. The plugging cover end and the ejector pipe hole opening are both provided with a process chamfer structure for easy installation. One end of the bellows is pressed onto the cedar ejector oil pipe of the ejector plastic seat, and the other end is pressed onto the cedar siphon oil pipe of the plastic oil pipe. The bellows connection can effectively ensure the sealing of the pipeline. The cedar ejector oil pipe has two sections of cedar-shaped barbs. The outer diameter of the hook is φ8.4mm, which is an interference fit with the inner diameter of the bellows of φ6.3mm. The fir siphon oil pipe has two sections of fir-tree-shaped hooks, and the outer diameter of the hooks is φ9.4mm, which is an interference fit with the inner diameter of the bellows of φ8mm. Align the plastic nozzle with the installation groove of the ejector plastic seat and press it in. The ribs on both sides of the plastic nozzle are 2mm wide and the grooves on both sides of the installation groove are 2mm wide, which is a transition fit to limit the rotation and movement of the plastic nozzle. After assembly, the first limit buckle of the plastic nozzle is in line with the card on the installation groove of the ejector plastic seat. The groove connection is locked to ensure the connection strength and limit the up and down movement. The outer diameter of the plastic nozzle is φ8.9mm and the inner diameter of the bottom of the installation groove is φ8.8mm, which is an interference fit to play a sealing role. Then press the Sφ5mm steel ball into the nozzle pipe through-hole inner diameter φ4.8mm of the plastic nozzle to ensure that the pipeline is blocked and sealed. Then push the oil return plastic seat through the L-shaped rib plate to the L-shaped groove on the ejector plastic seat. The L-shaped rib plate has a 2mm thickness and the L-shaped groove has a 2mm width to form a transition fit to ensure the connection strength. Once in place, the second stopper on the plastic nozzle connects and locks with the slot on the first oil outlet line of the oil return plastic base. The L-shaped groove opening features a chamfered design for easy installation. Finally, insert the O-ring into the sealing groove of the second oil outlet line of the oil return plastic base to complete the installation of the oil-discharging dual-injection oil return device. The φ5mm sealing oil inlet end of the plastic nozzle forms an interference fit with the φ4.8mm inner diameter of the first oil outlet line of the oil return plastic base, providing a seal. The upper end of the sealing groove features a chamfered design for easy installation. Disassembly requires only the reverse order, making it quick and easy to install and maintain.

[0019] 3. Ensure that the oil outlet dual-jet oil return device body and the oil storage barrel assembly are non-detachable, and the pump core bracket and the oil outlet dual-jet oil return device body and the oil storage barrel assembly are mutually detachable.

[0020] The oil outlet double-injection oil returner body is installed on the corresponding hole position of the oil storage bucket assembly through the drainage cavity pipe of the ejection plastic seat and the second oil outlet pipeline of the oil return plastic seat. After assembly, the baffle at the rear side of the second oil outlet pipeline of the oil return plastic seat abuts against the installation hole position of the oil storage bucket assembly, while the bucket support rib plate on the oil storage bucket assembly abuts against the ejection plastic seat, limiting the downward movement of the oil outlet double-injection oil returner body. The outer diameter φ9.3mm of the drainage cavity pipe of the oil outlet double-injection oil returner body and the inner diameter φ9.5mm of the bucket limiting rib plate on the oil storage bucket assembly are in clearance fit, facilitating installation while ensuring installation firmness. The maximum outer diameter φ12.5mm of the O-shaped sealing ring on the oil return plastic seat and the inner diameter φ11.4mm of the installation hole position are in interference fit, ensuring the sealing performance of the ejection pipeline. The plastic oil pipe of the oil outlet double-injection oil returner body is arranged outside the oil storage bucket assembly and is positioned and installed through the circular groove and limiting circular point, the guide rib plate and limiting installation groove. The inner diameter φ5mm of the circular groove and the outer diameter φ5mm of the limiting circular point are in transition fit, ensuring firmness. The guide rib plate has a width of 1.9mm and the limiting installation groove has a width of 2mm, facilitating installation. The circular groove and the guide rib plate are both provided with a process chamfer structure for facilitating installation. Then, the limiting circular points on both sides of the oil storage bucket assembly are flattened using a tool. After flattening, the outer diameter of the limiting circular points increases, limiting the falling of the plastic oil pipe. The flattened limiting circular points cannot be restored, so the oil outlet double-injection oil returner body and the oil storage bucket assembly are in a non-detachable assembly mode.

[0021] The pump core support is connected and installed on the upper side of the oil storage bucket assembly through the buckle and the clamping groove of the oil storage bucket assembly. The support oil outlet pipe on the pump core support is matched with the oil inlet pipeline of the oil outlet double-injection oil returner body with an inner diameter of 9.5mm. The O-shaped sealing ring on the support oil outlet pipe has a maximum outer diameter of φ10.2mm, which is in interference fit, ensuring the sealing performance of the pipeline. After assembly, the oil inlet pipeline abuts against the support oil outlet pipe, limiting the upward movement of the oil outlet double-injection oil returner body. When disassembling and replacing the pump core support, the buckle locking of the pump core support and the oil storage bucket assembly is released through a tool, and the pump core support can be pushed upward and taken out. It is convenient, fast, easy to install and maintain.

[0022] 4. The siphon auxiliary fuel tank fuel medium and the injection main fuel tank fuel medium oil return function. The fuel medium flows out of the pump core support from the support oil outlet pipe, flows downward through the oil inlet pipe connected to the outlet double injection oil return device body, and flows downward to the first oil outlet pipe and the second oil outlet pipe. The first oil outlet pipe pushes the fuel medium to the plastic nozzle, and the fuel medium is injected through a diameter sharply reduced injection hole φ0.6mm in the plastic nozzle. The injection hole is opposite to the drainage cavity pipe, and a siphon cavity is arranged between the injection hole and the drainage cavity pipe. One side of the injection cavity is connected to the siphon pipe, and the siphon pipe is connected to the plastic oil pipe of the outlet double injection oil return device body. The plastic oil pipe is connected to the auxiliary fuel tank through the oil pipe. The high-pressure flow of the extremely fast injection forms a siphon effect to drive the fuel medium in the auxiliary fuel tank to enter the main fuel tank more effectively and quickly. The second oil outlet pipe flows downward through the oil storage bucket assembly, changes direction upward through the pipeline of the oil storage bucket assembly, and pushes the fuel medium upward to a diameter sharply reduced injection hole φ0.6mm. The injection hole is opposite to the oil return port, and a injection cavity is arranged between the injection hole and the oil return port. The bottom of the injection cavity is connected to the outside of the oil storage bucket assembly. The high-pressure flow of the extremely fast injection forms a siphon effect to drive the fuel medium in the main fuel tank to return to the oil tank more effectively and quickly. The siphon and injection double oil return function meets the engine oil supply demand.

[0023] 5. Because the siphon pipe is sealed and the highest oil outlet port is located at the bottom of the drainage cavity pipe, when the fuel medium in the auxiliary fuel tank is less than that in the main fuel tank, and the fuel pump support assembly does not work, the fuel medium will flow back from the main fuel tank to the auxiliary fuel tank due to the height difference of the oil level, until the oil level in the main fuel tank is consistent with that in the auxiliary fuel tank or the fuel medium surface is lower than the highest oil outlet port. Therefore, a relief hole with a diameter of φ0.7mm is arranged below the tree injection oil pipe on the injection plastic seat, which has little effect on the siphon function. At this time, the relief hole is the highest oil outlet port. When the fuel medium in the main fuel tank flows back to the relief hole position, the pipeline is no longer sealed, that is, the backflow phenomenon does not occur, and the design is simple.

[0024] 6. The outlet double injection oil return device body can also cancel the siphon function according to the demand, and only play the injection oil return role. Replace the core support on the oil return plastic seat mold, and block the first oil outlet pipe. At this time, the outlet double injection oil return device body has no siphon function, and only plays the injection oil return role. The design is simple and has strong general performance.

[0025] 7. The oil outlet double injection oil return device body component oil return plastic seat, injection plastic seat, plastic oil pipe, plug cover, plastic nozzle material is POM copolymer formaldehyde material, has good dimensional stability, higher surface hardness, self-lubricating, friction and excellent electrical insulation. Can resist methanol gasoline, ethanol gasoline, ordinary gasoline and other conventional fuel media, maintain considerable chemical stability at high temperature. Can well cope with the complex working environment in the automobile fuel tank, the injection molded parts of the oil return plastic seat, the injection plastic seat, the plastic oil pipe, the plug cover and the plastic nozzle are firmly installed, which can meet the use and installation requirements. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0027] Figure 1 It is an overall schematic diagram of the assembly of the present application.

[0028] Figure 2 It is an assembly explosion schematic diagram of the assembly of the present application.

[0029] Figure 3 It is an assembly explosion schematic diagram and a structure schematic diagram of the oil outlet double injection oil return device body of the present application.

[0030] Figure 4 It is a structure schematic diagram of one of the cooperating components, the oil storage barrel assembly of the present application.

[0031] Figure 5 It is a flow channel schematic diagram of the assembly of the present application.

[0032] Figure 6 It is an important dimension schematic diagram of one of the components, the injection plastic seat of the present application.

[0033] Figure 7 It is an important dimension schematic diagram of one of the components, the plastic nozzle of the present application.

[0034] Figure 8 It is an important dimension schematic diagram of one of the components, the plastic oil pipe of the present application.

[0035] Figure 9 It is an important dimension schematic diagram of one of the components, the oil return plastic seat of the present application.

[0036] Marked in the figure: 1-pump core support, 2-oil double injection oil returner body, 3-oil storage bucket assembly, 4-corrugated pipe, 5-steel ball, 6-oil return plastic seat, 7-plastic nozzle, 8-entrainment plastic seat, 9-plastic oil pipe, 10-O-shaped sealing ring, 11-plug, 1.1-support oil outlet pipe, 3.1-bucket support rib plate, 3.2-bucket limiting rib plate, 3.3-limiting round dot, 3.4-limiting installation slot, 6.1-oil inlet pipeline, 6.2-first oil outlet pipeline, 6.3-L-shaped rib plate, 6.4-second oil outlet pipeline, 7.1-sealing oil inlet end, 7.2-nozzle pipeline through hole, 7.3-first limiting buckle, 7.4-thin rib, 7.5-second limiting buckle, 8.1-tree spruce entrainment oil pipe, 8.2-pressure relief hole, 8.3-installation slot, 8.4-L-shaped groove, 8.5-entrainment seat pipeline through hole, 8.6-drainage cavity pipe, 8.7-groove, 9.1-tree spruce siphon oil pipe, 9.2-guiding rib plate, 9.3-round groove. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Figures 1 to 9 It should be apparent that the described embodiments are only a part of embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0038] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the embodiments of the present application.

[0039] As Figures 1 to 9As shown, a new fuel pump support assembly oil outlet double injection oil return device assembly includes an oil outlet double injection oil return device body 2 composed of a corrugated pipe 4, a steel ball 5, an oil return plastic seat 6, a plastic nozzle 7, an injection plastic seat 8, a plastic oil pipe 9, an O-shaped sealing ring 10, a plug cover 11 and other components. The plug cover 11 is pressed into the injection plastic seat 8, the corrugated pipe 4 connects the injection plastic seat 8 and the plastic oil pipe 9, the plastic nozzle 7 is pressed into the installation groove 8.3 of the injection plastic seat 8, and then the steel ball 5 is pressed into the head hole of the plastic nozzle 7. Then the oil return plastic seat 6 is pushed into the L-shaped groove 8.4 of the injection plastic seat 8 through the L-shaped rib plate 6.3. After assembly, the second limiting buckle 7.5 on the plastic nozzle is connected and locked with the buckle groove on the first oil outlet pipeline 6.2 of the oil return plastic seat 6. Finally, the O-shaped sealing ring 10 is placed in the sealing groove of the second oil outlet pipeline 6.4 of the oil return plastic seat 6, and the installation of the oil outlet double injection oil return device body 2 is completed. The plug cover 11 and the steel ball 5 ensure that the pipeline is blocked and sealed. The connection part of the plastic nozzle 7, the oil return plastic seat 6 and the injection plastic seat 8 is in interference fit and plays a sealing role. The oil outlet double injection oil return device body 2 is assembled with the pump core support 1 and the oil storage bucket assembly 3 to ensure the function of the siphon and injection pipeline of the fuel pump support assembly. The oil outlet double injection oil return device body 2 is installed on the corresponding hole of the oil storage bucket assembly 3 through the drainage cavity tube 8.6 of the injection plastic seat 8 and the second oil outlet pipeline 6.4 of the oil return plastic seat 6. The O-shaped sealing ring 10 on the oil return plastic seat 6 ensures the sealing performance of the injection pipeline. The plastic oil pipe 9 of the oil outlet double injection oil return device body 2 is arranged outside the oil storage bucket assembly 3 and is positioned and installed through the round groove 9.3, the limiting round dot 3.3 and the limiting installation groove 3.4. Then the two limiting round dots 3.3 on the oil storage bucket assembly 3 are flattened by using a tool to prevent the plastic oil pipe 9 from falling off. Then the pump core support 1 is connected and installed above the oil storage bucket assembly 3 through the buckle. The support oil outlet pipe 1.1 on the pump core support 1 is in interference fit with the oil inlet pipeline 6.1 of the oil outlet double injection oil return device body 2 through the O-shaped sealing ring on the pump core support 1 to ensure the sealing performance of the pipeline. By adding the oil outlet double injection oil return device body 2, the existing fuel pump support assembly can realize the oil return function of the siphon auxiliary oil tank fuel medium and the injection main oil tank fuel medium. The pump core support 1 and the oil storage bucket assembly 3 belong to the prior art and are not described in detail here.

[0040] In the above technical solution, the oil outlet double injection oil return device body 2 is detachably assembled with each other; the oil outlet double injection oil return device body 2 and the oil storage bucket assembly 3 are not detachably assembled with each other; the pump core support 1 and the oil outlet double injection oil return device body 2 and the oil storage bucket assembly 3 are detachably assembled with each other; by adding the oil outlet double injection oil return device body 2, the existing fuel pump support assembly can realize the oil return function of the siphon auxiliary oil tank fuel medium and the injection main oil tank fuel medium.

[0041] In order to facilitate the oil discharge, the main body 2 of the double-jet oil return device is designed to be detachable from each other. Press the plugging cover 11 into the ejector pipe through hole 8.5 of the ejector plastic seat 8. The outer diameter of the plugging cover 11 end is φ6.2mm, and the inner diameter of the ejector pipe through hole 8.5 is φ6mm, which is an interference fit to ensure that the pipeline is blocked and sealed. The end of the plugging cover 11 and the opening of the ejector pipe through hole 8.5 are both provided with a process chamfer structure for easy installation; one end of the bellows 4 is pressed onto the cedar ejector oil pipe 8.1 of the ejector plastic seat 8, and the other end is pressed onto the cedar siphon oil pipe 9.1 of the plastic oil pipe 9. The connection of the bellows 4 can effectively ensure the sealing of the pipeline. The cedar ejector oil pipe 8.1 has two sections of cedar-shaped barbs. The outer diameter of the barbs is φ8.4mm, which is an interference fit with the inner diameter of the bellows 4 of φ6.3mm. The fir siphon oil pipe 9.1 has two sections of fir-shaped barbs, and the outer diameter of the barbs is φ9.4mm, which is an interference fit with the inner diameter of the bellows 4 of φ8mm. The plastic nozzle 7 is aligned with the mounting groove 8.3 of the ejector plastic seat 8 and pressed in. The ribs 7.4 on both sides of the plastic nozzle 7 are 2mm wide and are in transition fit with the grooves 8.7 on both sides of the mounting groove 8.3 of 2mm, which limits the rotation and movement of the plastic nozzle 7. After being assembled in place, the first limit buckle 7.3 of the plastic nozzle 7 is aligned with the mounting groove 8.3 of the ejector plastic seat 8. The card slot on the upper part is connected and locked to ensure the connection strength and limit the up and down movement. The outer diameter of the plastic nozzle 7 is φ8.9mm and the inner diameter of the bottom of the installation groove 8.3 is φ8.8mm, which is an interference fit to play a sealing role. Then press the Sφ5mm steel ball 5 into the nozzle pipe through hole 7.2 of the plastic nozzle 7 with an inner diameter of φ4.8mm to ensure that the pipeline is blocked and sealed. Then push the return oil plastic seat 6 through the L-shaped rib plate 6.3 to the L-shaped groove 8.4 on the ejector plastic seat 8. The L-shaped rib plate 6.3 has a rib thickness of 2mm and a transition fit with the L-shaped groove 8.4 with a width of 2mm to ensure the connection strength and assemble it. After positioning, the second stopper 7.5 on the plastic nozzle 7 engages and locks with the slot on the first oil outlet line 6.2 of the oil return plastic base 6. The opening of the L-shaped groove 8.4 features a chamfered design for easy installation. Finally, insert the O-ring 10 into the sealing groove of the second oil outlet line 6.4 of the oil return plastic base 6, completing the installation of the dual-injection oil return unit 2. The outer diameter (φ5mm) of the sealed oil inlet end 7.1 of the plastic nozzle 7 forms an interference fit with the inner diameter (φ4.8mm) of the first oil outlet line 6.2 of the oil return plastic base 6, providing a seal. The upper end of the sealing groove features a chamfered design for easy installation. Disassembly requires only the reverse order. This facilitates assembly, requiring minimal operator skill during production, assembly, maintenance, and replacement, making it easy to learn and rework.

[0042] In order to ensure that the oil outlet dual-jet oil return device body 2 and the oil storage barrel assembly 3 are assembled in a non-detachable manner, the pump core bracket 1 and the oil outlet dual-jet oil return device body 2 and the oil storage barrel assembly 3 are assembled in a mutually detachable manner.

[0043] The oil outlet double-jet oil returner body 2 is installed on the oil storage bucket assembly 3 through the drainage cavity pipe 8.6 of the ejection plastic seat 8 and the second oil outlet pipeline 6.4 of the oil return plastic seat 6. After assembly, the back plate of the second oil outlet pipeline 6.4 of the oil return plastic seat 6 is abutted with the installation hole of the oil storage bucket assembly 3, and the bucket support rib plate 3.1 on the oil storage bucket assembly 3 is abutted with the ejection plastic seat 8, thereby limiting the downward movement of the oil outlet double-jet oil returner body 2. The outer diameter φ9.3mm of the drainage cavity pipe 8.6 of the oil outlet double-jet oil returner body 2 is in clearance fit with the inner diameter φ9.5mm of the bucket limiting rib plate 3.2 on the oil storage bucket assembly 3, thereby facilitating installation and ensuring the installation firmness. The maximum outer diameter φ12.5mm of the O-shaped sealing ring 10 on the oil return plastic seat 6 is in interference fit with the inner diameter φ11.4mm of the installation hole, thereby ensuring the sealing performance of the ejection pipeline. The plastic oil pipe 9 of the oil outlet double-jet oil returner body 2 is arranged outside the oil storage bucket assembly 3 and is positioned and installed through the circular groove 9.3 and the limiting circular point 3.3, the guide rib plate 9.2 and the limiting installation groove 3.4. The inner diameter φ5mm of the circular groove 9.3 is in transition fit with the outer diameter φ5mm of the limiting circular point 3.3, thereby ensuring the firmness. The width 1.9mm of the guide rib plate 9.2 is in clearance fit with the groove width 2mm of the limiting installation groove 3.4, thereby facilitating installation. The circular groove 9.3 and the guide rib plate 9.2 are both provided with a process chamfer structure for facilitating installation. Then, the limiting circular points 3.3 on both sides of the oil storage bucket assembly 3 are flattened by using a tool. After the limiting circular points 3.3 are flattened, the outer diameter is increased, thereby limiting the falling of the plastic oil pipe 9. The flattened limiting circular points 3.3 cannot be restored, so that the oil outlet double-jet oil returner body 2 and the oil storage bucket assembly 3 are in a non-detachable assembly mode;

[0044] The pump core support 1 is connected and installed on the upper side of the oil storage bucket assembly 3 through the buckle and the clamping groove of the oil storage bucket assembly 3. The support oil outlet pipe 1.1 on the pump core support 1 is in fit with the inner diameter 9.5mm of the oil inlet pipeline 6.1 of the oil outlet double-jet oil returner body 2. The maximum outer diameter φ10.2mm of the O-shaped sealing ring of the support oil outlet pipe 1.1 is in interference fit, thereby ensuring the pipeline sealing performance. After assembly, the oil inlet pipeline 6.1 is abutted with the support oil outlet pipe 1.1, thereby limiting the upward movement of the oil outlet double-jet oil returner body 2. When the pump core support 1 is disassembled and replaced, the buckle locking of the pump core support 1 and the oil storage bucket assembly 3 is released through a tool, so that the pump core support 1 can be pushed upward and taken out. It is convenient, fast, easy to install and maintain.

[0045] In order to siphon the fuel medium of the auxiliary fuel tank and inject the fuel medium of the main fuel tank back to the oil function. The fuel medium flows out of the support oil outlet pipe 1.1 of the pump core support 1, flows downward through the oil inlet pipe 6.1 connected to the outlet double injection back oil device body 2, and flows downward to the first oil outlet pipe 6.2 and the second oil outlet pipe 6.4. The first oil outlet pipe 6.2 pushes the fuel medium to the plastic nozzle 7, and the fuel medium is injected through a diameter sharply reduced injection hole φ0.6mm of the plastic nozzle 7. The injection hole is opposite to the drainage cavity pipe 8.6, and a siphon cavity is arranged between the injection hole and the drainage cavity pipe 8.6. One side of the injection cavity is connected to the siphon pipe, and the siphon pipe is connected to the plastic oil pipe 9 of the outlet double injection back oil device body 2. The plastic oil pipe 9 is connected to the auxiliary fuel tank through the oil pipe. The high-pressure flow of the rapid injection forms a siphon effect, so that the fuel medium in the auxiliary fuel tank is more effectively and quickly introduced into the main fuel tank. The second oil outlet pipe 6.4 flows downward through the oil storage bucket assembly 3, changes the direction of the pipeline upward through the oil storage bucket assembly 3, and flows upward to push the fuel medium to a diameter sharply reduced injection hole φ0.6mm. The injection hole is opposite to the oil return port, and a injection cavity is arranged between the injection hole and the oil return port. The bottom of the injection cavity is connected to the outside of the oil storage bucket assembly 3. The high-pressure flow of the rapid injection forms a siphon effect, so that the fuel medium in the main fuel tank is more effectively and quickly returned. The siphon and injection double back oil functions meet the engine oil supply requirements. Figure 5 Flow channel schematic diagram

[0046] As a preferred technical solution, because the siphon pipe is sealed and the highest oil outlet is located at the bottom of the drainage cavity pipe 8.6, when the fuel medium in the auxiliary fuel tank is less than that in the main fuel tank and the fuel pump support assembly is not working, the fuel medium will flow back from the main fuel tank to the auxiliary fuel tank due to the height difference of the oil level, until the oil level in the main fuel tank is consistent with that in the auxiliary fuel tank or the fuel medium surface is lower than the highest oil outlet. Therefore, a relief hole 8.2 with a hole diameter φ0.7mm is arranged below the spruce injection oil pipe 8.1 on the injection plastic seat 8, which has little effect on the siphon function. At this time, the relief hole 8.2 is the highest oil outlet. When the fuel medium in the main fuel tank flows back to the relief hole 8.2 position, the pipeline is no longer sealed, that is, the backflow phenomenon will not occur. The design is simple.

[0047] As a preferred technical solution, the outlet double injection back oil device body 2 can also cancel the siphon function according to the demand, and only play the role of injection back oil. The first oil outlet pipe is blocked on the back oil plastic seat 6 mold, and the outlet double injection back oil device body 2 has no siphon function at this time, and only plays the role of injection back oil. The design is simple and has strong general performance.

[0048] As a preferred technical solution, the material of the oil outlet double-injection oil return device body 2, including the oil return plastic seat 6, the injection plastic seat 8, the plastic oil pipe 9, the plug cover 11 and the plastic nozzle 7, is POM (polyoxymethylene) material, which has good dimensional stability, high surface hardness, self-lubricating property, friction property and excellent electrical insulation. It can resist methanol gasoline, ethanol gasoline, ordinary gasoline and other conventional fuel media, and maintain good chemical stability at high temperatures. It can well cope with the complex working environment in the automobile fuel tank, and the injection molded parts, including the oil return plastic seat 6, the injection plastic seat 8, the plastic oil pipe 9, the plug cover 11 and the plastic nozzle 7, are firmly installed, which can meet the use and installation requirements.

[0049] Working principle: press the plug cover 11 into the injection seat pipe through hole 8.5 of the injection plastic seat 8, press one end of the corrugated pipe 4 on the tree injection oil pipe 8.1 of the injection plastic seat 8, and press the other end on the tree siphon oil pipe 9.1 of the plastic oil pipe 9, align the plastic nozzle 7 with the installation groove 8.3 of the injection plastic seat 8, press into the plastic nozzle 7, the two sides of the plastic nozzle 7 are matched with the two sides of the recess 8.7 of the installation groove 8.3, the plastic nozzle 7 is matched with the inner diameter of the bottom of the installation groove 8.3, and the sealing effect is achieved; then press the steel ball 5 into the nozzle pipe through hole 7.2 of the plastic nozzle 7, then push the oil return plastic seat 6 through the L-shaped rib plate 6.3 to align the L-shaped groove 8.4 on the injection plastic seat 8, and after assembly, the second limiting buckle 7.5 on the plastic nozzle 7 is connected and locked with the buckle groove on the first oil outlet pipeline 6.2 of the oil return plastic seat 6, and finally the O-shaped sealing ring 10 is placed on the sealing groove of the second oil outlet pipeline 6.4 of the oil return plastic seat 6, and the oil outlet double-injection oil return device body 2 is assembled. The oil outlet double-injection oil return device body 2 is installed on the corresponding hole position of the oil storage bucket assembly 3 through the drainage cavity tube 8.6 of the injection plastic seat 8 and the second oil outlet pipeline 6.4 of the oil return plastic seat 6, the plastic oil pipe 9 is arranged outside the oil storage bucket assembly 3, and is positioned and installed through the circular groove 9.3 and the limiting circular point 3.3, the guide rib plate 9.2 and the limiting installation groove 3.4, then the two limiting circular points 3.3 on the oil storage bucket assembly 3 are flattened by using a tool, which limits the falling of the plastic oil pipe 9, and finally the pump core support 1 is connected and installed on the oil storage bucket assembly 3 through the buckle and the buckle groove of the oil storage bucket assembly 3, which can complete the assembly of the related parts of the oil outlet double-injection oil return device body 2.

[0050] Fuel medium flows out from the support oil outlet pipe 1.1 of the pump core support 1, flows downward through the oil inlet pipe 6.1 connected to the oil outlet double-jet oil returner body 2, and is divided into the first oil outlet pipe 6.2 and the second oil outlet pipe 6.4. The first oil outlet pipe 6.2 pushes the fuel medium to the plastic nozzle 7, and the fuel medium is jetted through a jet hole φ0.6mm with a sharp diameter reduction in the plastic nozzle 7, which is opposite to the flow guide cavity pipe 8.6. A siphon cavity is arranged between the jet hole and the flow guide cavity pipe 8.6, and the siphon cavity is connected to a siphon pipe, which is connected to the plastic oil pipe 9 of the oil outlet double-jet oil returner body 2. The plastic oil pipe 9 is connected to the auxiliary fuel tank through an oil pipe. The high-pressure flow of the ultra-fast jet forms a siphon effect, so that the fuel medium in the auxiliary fuel tank is more effectively and quickly introduced into the main fuel tank. The second oil outlet pipe 6.4 flows downward through the oil storage bucket assembly 3, changes the direction upward through the pipe of the oil storage bucket assembly 3, and pushes the fuel medium to a jet hole φ0.6mm with a sharp diameter reduction. The jet hole is opposite to the oil return port, and a jet cavity is arranged between the jet hole and the oil return port. The bottom of the jet cavity is connected to the outside of the oil storage bucket assembly 3. The high-pressure flow of the ultra-fast jet forms a siphon effect, so that the fuel medium in the main fuel tank is more effectively and quickly returned.

[0051] Skilled persons should know that although the present application has been described according to the above specific embodiments, the inventive idea of the present application is not limited to the present application, and any modification using the inventive idea will be included in the protection scope of the present patent.

Claims

1. A novel fuel pump bracket assembly oil outlet double injection oil return device component, comprising an oil outlet double injection oil return device body, a pump core bracket and an oil storage bucket assembly, the oil outlet double injection oil return device body, the pump core bracket and the oil storage bucket assembly are assembled with each other, characterized in that The oil outlet double-injection oil returner body comprises a corrugated pipe, a steel ball, an oil return plastic seat, a plastic nozzle, an injection plastic seat, a plastic oil pipe, an O-shaped sealing ring and a plug cover. The plug cover is pressed into the injection plastic seat, the corrugated pipe connects the injection plastic seat and the plastic oil pipe, the plastic nozzle is pressed into the installation groove of the injection plastic seat, the plastic nozzle is locked through the buckle and the slot, the steel ball is then pressed into the nozzle pipe hole of the plastic nozzle, the oil return plastic seat is then pushed into the L-shaped groove of the injection plastic seat through the L-shaped rib plate, the second limiting buckle of the plastic nozzle is locked with the slot of the first oil outlet pipeline of the oil return plastic seat after assembly, the O-shaped sealing ring is finally placed in the sealing groove of the second oil outlet pipeline of the oil return plastic seat, the connection part of the plastic nozzle and the oil return plastic seat and the injection plastic seat is in interference fit, and the connection part plays a sealing role. The oil outlet double-injection oil returner body and the oil storage bucket assembly are in a non-detachable assembly mode, and the pump core support and the oil outlet double-injection oil returner body and the oil storage bucket assembly are in a detachable assembly mode. The plug cover is pressed into the injection seat pipeline hole of the injection plastic seat, one end of the corrugated pipe is pressed into the fir tree injection oil pipe of the injection plastic seat, the fir tree injection oil pipe has two fir tree-shaped hooks, the other end of the corrugated pipe is pressed into the fir tree siphon oil pipe of the plastic oil pipe, the fir tree siphon oil pipe has two fir tree-shaped hooks, the plastic nozzle is pressed into the installation groove of the injection plastic seat, the thin ribs on both sides of the plastic nozzle limit the rotation and movement of the plastic nozzle, the first limiting buckle of the plastic nozzle is locked with the slot of the installation groove of the injection plastic seat after assembly, the steel ball is then pressed into the nozzle pipe hole of the plastic nozzle, the oil return plastic seat is then pushed into the L-shaped groove of the injection plastic seat through the L-shaped rib plate, the second limiting buckle of the plastic nozzle is locked with the slot of the first oil outlet pipeline of the oil return plastic seat after assembly, and the O-shaped sealing ring is finally placed in the sealing groove of the second oil outlet pipeline of the oil return plastic seat, thereby completing the installation of the oil outlet double-injection oil returner body.

2. A new fuel pump bracket assembly oil outlet double jet oil returner component according to claim 1, characterized in that: The oil outlet double-injection oil returner body is installed on the corresponding hole position of the oil storage bucket assembly through the drainage cavity pipe of the injection plastic seat and the second oil outlet pipeline of the oil return plastic seat. After assembly, the back plate of the second oil outlet pipeline of the oil return plastic seat is in abutment with the installation hole position of the oil storage bucket assembly, and the bucket support rib plate on the oil storage bucket assembly is in abutment with the injection plastic seat, thereby limiting the downward movement of the oil outlet double-injection oil returner body. The drainage cavity pipe of the oil outlet double-injection oil returner and the bucket limiting rib plate on the oil storage bucket assembly are in clearance fit, the O-shaped sealing ring on the oil return plastic seat and the inner diameter of the installation hole position are in interference fit, thereby ensuring the sealing performance of the injection pipeline. The plastic oil pipe of the oil outlet double-injection oil returner body is arranged outside the oil storage bucket assembly and is positioned and installed through the circular groove, the limiting circular point and the limiting installation slot. The limiting circular points on both sides of the oil storage bucket assembly are pressed flat. The outer diameter of the pressed limiting circular points is larger, thereby limiting the falling of the plastic oil pipe. The pressed limiting circular points cannot be restored, and therefore the oil outlet double-injection oil returner body and the oil storage bucket assembly are in a non-detachable assembly mode. The pump core support is connected and installed above the oil storage bucket assembly through buckles and the clamping grooves of the oil storage bucket assembly. The support oil outlet pipe on the pump core support is in interference fit with the oil inlet pipe of the oil outlet double-jet oil returner body through the O-shaped sealing ring on the pump core support, so as to ensure the sealing performance of the pipeline. After assembly, the oil inlet pipe is in abutment with the support oil outlet pipe, thereby limiting the upward movement of the oil outlet double-jet oil returner body.

3. A new type of fuel pump bracket assembly oil outlet double injection oil returner component according to claim 1, characterized in that: The fuel medium is discharged from the support oil outlet pipe of the pump core support, flows downward through the oil inlet pipe connected to the oil outlet double-jet oil returner body, and is divided into two streams, i.e., the first oil outlet pipeline and the second oil outlet pipeline. The first oil outlet pipeline pushes the fuel medium to the plastic nozzle, and the fuel medium is jetted through a jet hole with a sharply reduced diameter in the plastic nozzle. The jet hole is opposite to the drainage cavity pipe, and a siphon cavity is arranged between the jet hole and the drainage cavity pipe. One side of the jet cavity is connected to the siphon pipe, and the siphon pipe is connected to the plastic oil pipe of the oil outlet double-jet oil returner body. The plastic oil pipe is connected to the auxiliary fuel tank through the oil pipe. The high-pressure flow of the ultra-fast jet forms a siphon effect, so that the fuel medium in the auxiliary fuel tank is more effectively and quickly introduced into the main fuel tank. The second oil outlet pipeline flows downward through the oil storage bucket assembly, changes the direction of the pipeline of the oil storage bucket assembly to flow upward, and pushes the fuel medium to a jet hole with a sharply reduced diameter. The jet hole is opposite to the oil return port, and a jet cavity is arranged between the jet hole and the oil return port. The bottom of the jet cavity is connected to the outside of the oil storage bucket assembly. The high-pressure flow of the ultra-fast jet forms a siphon effect, so that the fuel medium in the main fuel tank is more effectively and quickly returned. The siphon and jet double oil return functions meet the engine oil supply requirements.

4. A novel fuel pump bracket assembly oil outlet double jet oil returner component according to claim 3, characterized in that: The siphon auxiliary fuel tank returns the fuel medium. Because the pipeline is sealed and the highest oil outlet port is located at the bottom of the drainage cavity pipe, when the fuel medium in the auxiliary fuel tank is less than that in the main fuel tank and the fuel pump support assembly is not working, the fuel medium will flow back from the main fuel tank to the auxiliary fuel tank due to the height difference of the oil level. Until the oil level in the main fuel tank is consistent with that in the auxiliary fuel tank or the fuel medium surface is lower than the highest oil outlet port, a relief hole is arranged below the fir tree jet oil pipe on the jet plastic seat. At this time, the relief hole is the highest oil outlet port. When the fuel medium in the main fuel tank flows back to the relief hole position, the pipeline is no longer sealed, i.e., the backflow phenomenon does not occur.

5. A new fuel pump bracket assembly oil outlet double jet oil returner component according to claim 1, characterized in that: The materials of the oil outlet double-jet oil returner body components, i.e., the oil return plastic seat, the jet plastic seat, the plastic oil pipe, the plug, and the plastic nozzle, are POM (polyoxymethylene) copolymer formaldehyde materials.

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