Pump core oil supply double injection pump with check valve and screen structure fuel pump assembly

Abstract

A pump core oil supply double injection pump with check valve and screen structure fuel pump assembly, including oil storage tank, one side of the oil storage tank is provided with external auxiliary oil tank, the oil storage tank is provided with oil storage tank cover, both sides of the oil storage tank are provided with support rod, the top of the support rod is provided with top cover, the top cover is provided with oil inlet pipe and oil outlet pipe, the oil storage tank is provided with injection pump assembly and pump core, the injection pump assembly includes pump body and pump cover, the pump cover is arranged on the pump body, the pump cover and the pump body form a connecting oil way, the connecting oil way has a ejector oil suction unit connected with the pump core and a remote oil suction unit connected with the external auxiliary oil tank, by integrating the ejector oil suction and remote oil suction functions in one injection pump, the screen is added at the injection port to prevent impurities in the pipeline from blocking the injection hole, the one-way valve structure is added at the injection port of the injection pump to prevent fuel backflow.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel pumps, in particular to a fuel pump assembly having a pump core supplying a double-jet pump with a check valve and a filter structure. Background Art

[0002] During the manufacturing process, impurities inevitably accumulate in the fuel pump assembly and its components. When this impurity-laden fuel flows through the injection pump assembly, the small nozzle size (diameter: 0.45 ± 0.05 mm) can clog the injector nozzles or cause poor fuel injection, leading to pump failure. When the fuel level is low, the reservoir tank cannot draw enough fuel, preventing proper fuel supply to the engine and causing the engine to stall. Furthermore, because most fuel pump assemblies utilize a remote intake system with return oil, insufficient return oil flow during high-speed driving or when climbing a hill can prevent the remote intake pump from activating properly. This can render fuel in the fuel tank, located far from the pump or in the auxiliary tank, unusable. Due to various gaps in the fuel pump assembly, fuel from the reservoir tank can slowly leak into the tank after prolonged use, causing some vehicles to fail to start properly when left overnight or parked for extended periods. Summary of the Invention

[0003] In view of this, the present invention provides a fuel pump assembly with a pump core supplying a double injection pump and a check valve and a filter structure.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A pump core oil supply double injection pump with a check valve and a filter structure fuel pump assembly includes an oil storage barrel, an external auxiliary oil tank is arranged on one side of the oil storage barrel, an oil storage barrel cover is arranged on the oil storage barrel, support rods are arranged on both sides of the oil storage barrel, a top cover is arranged on the top end of the support rod, an oil inlet pipe and an oil outlet pipe are arranged on the top cover, a jet pump assembly and a pump core are arranged in the oil storage barrel, the jet pump assembly includes a pump body and a pump cover, the pump cover is arranged on the pump body, a connecting oil circuit is formed between the pump cover and the pump body, the connecting oil circuit has an ejection oil suction unit connected to the pump core and a remote oil suction unit connected to the external auxiliary oil tank.

[0006] Preferably, the injection oil suction unit includes an injection oil inlet pipe and a one-way valve assembly. The pump cover protrudes to form an injection oil inlet end. The injection oil inlet pipe is arranged in the injection oil inlet end. The injection oil inlet pipe is connected to the connecting oil circuit. The one-way valve assembly is arranged in the injection oil inlet pipe. The one-way valve assembly includes a one-way valve positioning seat, a one-way valve core and a return spring.

[0007] Preferably, the inner wall of the injection oil pipe is protruded to form a mounting portion, the one-way valve positioning seat is arranged on the mounting portion, a spring positioning end is arranged on the one-way valve positioning seat, a connecting hole is arranged in the center of the spring positioning end to communicate the upper and lower parts of the one-way valve positioning seat, one end of the one-way valve core extends into the connecting hole to be connected with the one-way valve positioning seat, the return spring is sleeved on the spring positioning end, and one end of the return spring extends towards the top end of the one-way valve core and abuts against the top end of the one-way valve core.

[0008] Preferably, the distal end oil suction unit comprises an oil return pipe and a distal end oil suction pipe, the oil return pipe is arranged on the oil return portion, the oil return pipe is arranged in a three-way pipe structure, the oil return pipe has an oil return port, an oil suction port and a connecting port, the connecting port is communicated with the oil return hole, the oil return port is communicated with the pump core, and the oil suction port is communicated with the distal end oil suction pipe.

[0009] Preferably, the oil return portion has a tapered oil return end, the oil return hole is arranged on the tapered oil return end, the oil return pipe has an oil suction connecting portion, the oil suction port is arranged on the oil suction connecting portion, and one end of the distal end oil suction pipe extends into the oil suction connecting portion to be connected with the oil return pipe.

[0010] Preferably, the oil return portion is provided with an oil return filter screen on the side close to the connecting oil way.

[0011] Preferably, the injection oil suction unit and the distal end oil suction unit have a jet structure, the jet structure is a nozzle protruded on the pump cover, and the two ends of the nozzle are communicated with the oil storage barrel and the connecting oil way.

[0012] Preferably, the pump body and the pump cover are fixed by ultrasonic welding.

[0013] The beneficial effects of the present application are as follows: the injection oil suction and the distal end oil suction functions at the oil storage barrel are integrated on the jet pump, the filter screen is arranged at the jet port to prevent impurities in the pipeline from blocking the jet hole, the one-way valve structure is arranged at the oil inlet of the jet pump to prevent the reverse flow of fuel. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0015] ATTACHMENT Figure 1 The structure of the present application is shown in the figure;

[0016] ATTACHMENTFigure 2 This is a schematic structural diagram of the jet pump assembly of the present invention;

[0017] Attachment Figure 3 For attachment Figure 2 A in the enlarged view. Implementation Method

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] The present invention provides the following technical solutions:

[0021] As attached Figures 1-3 As shown, the present invention discloses a fuel pump assembly with a pump core supply dual-jet pump with a check valve and filter structure. The assembly includes a fuel tank 1, an external auxiliary fuel tank (not shown) disposed on one side of the fuel tank 1, a top cover 4 disposed on the fuel tank 1, support rods 3 disposed on both sides of the fuel tank 1, and a jet pump assembly 7 and a pump core 8 disposed within the fuel tank 1. The jet pump assembly 7 includes a pump body 9 and a pump cover 10 disposed on the pump body. A connecting oil passage 11 is formed between the pump cover 10 and the pump body 9. The connecting oil passage 11 includes an ejection and suction unit 12 connected to the pump core 8 and a remote suction unit 13 connected to the external auxiliary fuel tank. Specifically, in this design, by integrating the ejection and suction units 12 and 13 into the jet pump assembly 7, both bottom ejection and remote suction functions of the fuel tank 1 can be achieved. Compared with other dual-jet pump structures, this significantly reduces the number of product components and simplifies assembly operations, thereby reducing production costs and improving production efficiency.

[0022] Further, the ejecting oil suction unit 12 comprises an ejecting oil inlet pipe 14 and a one-way valve assembly 15, the pump cover 10 is protruded to form an ejecting oil inlet end 16, the ejecting oil inlet pipe 14 is arranged in the ejecting oil inlet end 16, the ejecting oil inlet pipe 14 is communicated with the connecting oil way 11, the one-way valve assembly 15 is arranged in the ejecting oil inlet pipe 14, the one-way valve assembly 15 comprises a one-way valve positioning seat 17, a one-way valve core 18 and a return spring 19. Specifically, the arrangement of the one-way valve assembly can prevent the fuel in the oil storage tank from leaking into the oil tank through the jet pump, the oil in the fuel pump enters the connecting oil way 11 through the ejecting oil inlet pipe 14, the impact force of the oil drives the one-way valve core 18 in the one-way valve assembly 15 to compress the return spring 19 to open the connecting oil way 11, so that the fuel enters the connecting oil way 11.

[0023] Further, the inner wall of the ejecting oil inlet pipe 14 is protruded to form a mounting portion 20, the one-way valve positioning seat 17 is arranged on the mounting portion 20, the one-way valve positioning seat 17 is provided with a spring positioning end 21, a connecting hole 22 is arranged in the center of the spring positioning end 21 to communicate the upper and lower parts of the one-way valve positioning seat 17, one end of the one-way valve core 18 extends into the connecting hole 22 and is connected with the one-way valve positioning seat 17, the return spring 19 is sleeved on the spring positioning end 21, and one end of the return spring 19 extends towards the top end of the one-way valve core 18 and abuts against the top end of the one-way valve core 18. Specifically, in the design, the one-way valve core 18 has a sealing limiting portion 23 and a connecting portion 24, the connecting portion 24 passes through the connecting hole 22 and is connected with the one-way valve positioning seat 17, the sealing limiting portion 23 is arranged in a hemispherical structure at the top end of the connecting portion 24, the sealing limiting portion 23 has a sealing arc surface 25 and a spring connecting surface 26, the sealing arc surface 25 is sealed and connected with the inner wall of the ejecting oil inlet pipe 14, and the end of the return spring 19 away from the spring positioning end 21 abuts against the spring connecting surface 26. When the oil enters the connecting oil way from the ejecting oil inlet pipe, the impact force of the oil will press the one-way valve core downward, so that the one-way valve core moves downward, the sealing limiting portion 23 is separated from the inner wall of the ejecting oil inlet pipe, and the oil can smoothly enter the connecting oil way.

[0024] Furthermore, the remote oil suction unit 13 includes an oil return pipe 27 and a remote oil suction pipe 28. The pump cover 10 is protruded to form an oil return portion 29. The oil return portion 29 is provided with an oil return hole 30 connected to the connecting oil circuit 11. The oil return pipe 27 is provided on the oil return portion 29. The oil return pipe 27 is provided in a three-way pipe structure. The oil return pipe 27 has an oil return port 31, an oil suction port 32 and a connecting port 33. The connecting port 33 is connected to the oil return hole 30. The return oil port 31 is connected to the pump core 8, and the oil suction port 32 is connected to the distal oil suction pipe 28. The end of the distal oil suction pipe 28 away from the oil suction port 32 is connected to the external auxiliary oil tank, bringing the fuel in the auxiliary oil tank into the return oil pipe, and then flowing from the return oil pipe to the oil storage barrel. Since the return oil pipe is a three-way pipe structure, the oil entering the return oil pipe from the distal oil suction pipe 28 will be driven by the faster flow rate of the oil sprayed out from the return oil hole 30, thereby entering the oil storage barrel faster for filling.

[0025] Furthermore, the oil return portion 29 has a tapered oil return end 34, the oil return hole 30 is disposed on the tapered oil return end 34, the oil return pipe 27 has an oil suction connection 38, the oil suction port 32 is disposed on the oil suction connection 38, and one end of the distal oil suction pipe 28 extends into the oil suction connection 38 and connects to the oil return pipe 27. Specifically, the diameter of the oil return hole 30 is smaller than the inner diameter of the oil return pipe and the inner diameter of the oil suction connection, thereby increasing the impact force of the fuel when passing through the oil return hole, thereby quickly passing through the oil return pipe into the oil storage tank.

[0026] Furthermore, a return oil filter 35 is provided on the side of the oil return portion 29 near the connecting oil passage 11. Specifically, in this design, a nozzle filter 36 is provided on the side of the connecting oil passage 11 near the nozzle 37. The provision of the return oil filter 35 and the nozzle filter 36 can largely prevent the injection function from failing due to impurities within the components or impurities mixed into the pipeline during assembly during operation of the injection pump, thereby improving the product qualification rate and the service life of the fuel pump assembly to a certain extent.

[0027] Furthermore, an injection structure is provided between the ejector oil suction unit 12 and the distal oil suction unit 13. The injection structure is a nozzle 37 protruding from the pump cover 10. The two ends of the nozzle 37 are connected to the oil storage barrel 1 and the connecting oil circuit 11. Specifically, the fuel at the bottom of the oil storage barrel is sucked into the interior of the oil storage barrel through the air suction effect generated during the oil spraying process, thereby achieving oil circulation. In addition, in this design, the diameter of the nozzle 37 is smaller than the inner diameter of the connecting oil circuit 11. As the fuel passes through the connecting oil circuit 11 and is then sprayed into the oil storage barrel by the nozzle 37, the oil originally in the connecting oil circuit 11 is compressed due to the smaller diameter of the nozzle 37, which increases the impact force when the oil is sprayed out of the nozzle, thereby increasing the speed of the oil spraying.

[0028] Furthermore, the pump body 9 and the pump cover 10 are fixed by ultrasonic welding. Specifically, the ultrasonically welded pump body 9 and the pump cover 10 have a simple and firm structure and are easy to operate during assembly.

[0029] Specifically, mounting holes 5 are provided on both sides of the oil storage barrel 1, one end of the support rod 3 extends into the mounting hole 5 and is connected to the oil storage barrel 1, a support spring 6 is sleeved on the outside of the support rod 3, two ends of the support spring 6 are correspondingly connected to the top cover 4 and the oil storage barrel 1, and one end of the support spring 6 extends into the mounting hole 5 and is connected to the mounting hole 5. In order to allow the support spring 6 to have a longer compression stroke, a mounting hole 5 extending downward is provided on the top cover 4, the upper end of the support rod 3 is connected to the top cover 4, and the lower end is provided in the hole groove of the support rod 3, and the lower end of the support spring 6 acts in the hole groove of the support rod 3. Since the lower end of the support spring 6 acts in the hole groove of the support rod 3, the compression stroke of the support spring 6 is longer, and the downward stroke of the top cover 4 is also longer.

[0030] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fuel pump assembly with a pump core supplying a dual-jet pump and a check valve and a filter structure, comprising an oil storage barrel, an external auxiliary oil tank disposed on one side of the oil storage barrel, an oil storage barrel cover disposed on the oil storage barrel, support rods disposed on both sides of the oil storage barrel, a top cover disposed on the top of the support rod, and an oil inlet pipe and an oil outlet pipe disposed on the top cover, characterized in that: The oil storage barrel is provided with a jet pump assembly and a pump core, the jet pump assembly includes a pump body and a pump cover, the pump cover is provided on the pump body, a connecting oil circuit is formed between the pump cover and the pump body, the connecting oil circuit has an injection oil suction unit connected to the pump core and a remote oil suction unit connected to the external auxiliary oil tank, the injection oil suction unit includes an injection oil inlet pipe and a one-way valve assembly, a protrusion on the pump cover forms an injection oil inlet end, the injection oil inlet pipe is provided in the injection oil inlet end, the injection oil inlet pipe is connected to the connecting oil circuit, the one-way valve assembly The component is arranged in the injection oil inlet pipeline, the one-way valve assembly includes a one-way valve positioning seat, a one-way valve core and a return spring, the remote oil suction unit includes a return oil pipe and a remote oil suction pipe, the pump cover protrudes to form an oil return part, and the oil return part is provided with an oil return hole connected to the connecting oil circuit, the oil return pipe is arranged on the oil return part, and the oil return pipe is arranged in a three-way pipe structure, the oil return pipe has an oil return port, an oil suction port and a connecting port, the connecting port is connected to the oil return hole, the oil return port is connected to the pump core, and the oil suction port is connected to the remote oil suction pipe.

2. The fuel pump assembly with a pump core supplying dual injection pump with a check valve and a filter structure according to claim 1 is characterized by: A mounting portion is formed by a protrusion on the inner wall of the injection oil inlet pipe, and the one-way valve positioning seat is arranged on the mounting portion. A spring positioning end is provided on the one-way valve positioning seat, and a connecting hole connecting the upper and lower parts of the one-way valve positioning seat is provided at the center of the spring positioning end. One end of the one-way valve core extends into the connecting hole and is connected to the one-way valve positioning seat. The return spring is sleeved on the spring positioning end, and one end of the return spring extends toward the top end of the one-way valve core and presses against the top end of the one-way valve core.

3. The fuel pump assembly with a pump core supplying dual injection pump with a check valve and a filter structure according to claim 1 is characterized by: The oil return part has a tapered oil return end, the oil return hole is arranged on the tapered oil return end, the oil return pipe has an oil suction connection part, the oil suction port is arranged on the oil suction connection part, and one end of the distal oil suction pipe extends into the oil suction connection part and is connected to the oil return pipe.

4. The fuel pump assembly with a pump core supplying a double jet pump with a check valve and a filter structure according to claim 1 is characterized in that: An oil return filter is provided on one side of the oil return portion close to the connecting oil circuit.

5. The fuel pump assembly with a pump core supplying a double jet pump with a check valve and a filter structure according to claim 1 is characterized in that: An injection structure is provided between the ejection oil suction unit and the distal oil suction unit. The injection structure is a nozzle protruding from the pump cover. Both ends of the nozzle are correspondingly connected to the oil storage barrel and the connecting oil circuit.

6. The fuel pump assembly with a pump core supplying a double jet pump with a check valve and a filter structure according to claim 1 is characterized in that: The pump body and the pump cover are fixed by ultrasonic welding.

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