Filtering structure of fuel pump

Abstract

The utility model belongs to the field of fuel pumps, and provides a fuel pump filtering structure which comprises a shell, a bypass body, a valve element and a spring. Wherein a filter element used for filtering fuel oil is arranged in the shell, and the shell is further connected with an oil inlet pipe and an oil outlet pipe used for outputting the filtered fuel oil; the bypass body forms a containing cavity and a pressure relief hole enabling the containing cavity to communicate with the oil inlet pipe. The bypass body further comprises a communicating hole communicating with the containing cavity and used for discharging fuel oil in the containing cavity. The valve element is movably installed in the containing cavity and matched with the pressure relief hole. The spring abuts against the valve element and enables the valve element to abut against the side wall of the containing cavity so as to seal the pressure relief hole, and the deformation direction of the spring is parallel to the axial direction of the pressure relief hole.

Description

Technical Field

[0001] The present application belongs to the field of fuel pumps, and more specifically, to a fuel pump filter structure. Background Art

[0002] In the current automobile industry, the fuel pump is the core component of the engine fuel supply system. The stability and reliability of its performance are directly related to the engine's operating efficiency and the overall performance of the vehicle. Among them, the filter structure of the fuel pump, as an important component to ensure fuel cleanliness and reduce engine wear, has always been the focus and difficulty of technical research and development. The traditional fuel pump filter structure mostly adopts a filter element structure composed of filter paper. Although it can filter out impurities in the fuel to a certain extent, as the use time increases, the impurities on the filter element will gradually accumulate, resulting in a decrease in filtration efficiency, and may even clog the filter element, affecting the normal supply of fuel. On the one hand, it causes the load of the fuel pump to increase, which is easy to heat up and cause the temperature to rise, resulting in danger; on the other hand, the larger pump oil pressure may cause the filter element to perforate, resulting in ineffective filtration. At the same time, since the fuel pump and its barrel body are installed inside the fuel tank in the prior art, it is difficult to find the filter element after it is clogged. Therefore, it is necessary to solve the above technical problems. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a fuel pump filter structure to solve the technical problem that the fuel pump is easily blocked in the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present application is: to provide a fuel pump filter structure, including:

[0005] A housing, inside of which is disposed a filter element for filtering the fuel, and the housing is also connected to an oil inlet pipe and an oil outlet pipe for outputting the filtered fuel;

[0006] A bypass body, forming a receiving chamber and a pressure relief hole for connecting the receiving chamber to the oil inlet pipe, the bypass body also comprising a connecting hole connected to the receiving chamber and used for discharging the fuel in the receiving chamber;

[0007] A valve core, movably mounted in the accommodating cavity and adapted to the pressure relief hole;

[0008] A spring abuts against the valve core and presses the valve core against the side wall of the accommodating cavity to close the pressure relief hole, and a deformation direction of the spring is parallel to the axial direction of the pressure relief hole.

[0009] Optionally, the fuel pump filter structure also includes a guide block arranged in the accommodating cavity, at least a portion of the valve core passes through the guide block and is slidably connected to the guide block, and the sliding direction of the valve core relative to the guide block is parallel to the axial direction of the pressure relief hole.

[0010] Two ends of the spring along its own deformation direction abut against the valve core and the guide block respectively.

[0011] Optionally, the guide block divides the accommodating chamber into two parts, the pressure relief hole and the communicating hole are arranged on the same side of the guide block, and the part of the accommodating chamber isolated from the pressure relief hole is communicated with the atmosphere;

[0012] The valve core is slidingly and sealingly connected to the guide block.

[0013] Optionally, the bypass body further has an end cover for forming the accommodating cavity, and the end cover and the communicating hole are distributed on both sides of the guide block;

[0014] The end cover is provided with a vent hole.

[0015] Optionally, the fuel pump filter structure further comprises a Hall switch disposed in the accommodating cavity and connected to the end cover;

[0016] The Hall switch is located on the moving path of the valve core and can be triggered by the valve core to generate an alarm signal.

[0017] Optionally, the fuel pump filter structure further comprises a barrel for containing fuel and a fuel pump capable of pumping fuel out of the barrel;

[0018] The accommodating cavity is communicated with the barrel body through the communicating hole.

[0019] Optionally, the shell and the barrel body are integrally formed.

[0020] Optionally, ribs for enhancing the structural strength of the shell are provided on the surface of the shell.

[0021] Optionally, the fuel pump filter structure further comprises an upper cover detachably connected to the housing, and the upper cover cooperates with the housing to form a cavity for accommodating the filter element;

[0022] The oil inlet pipe and the oil outlet pipe are connected to the upper cover.

[0023] Optionally, the fuel pump filter structure further comprises a support leg injection-molded on the upper cover, and the bypass body is mounted on and supported by the support leg.

[0024] The fuel pump filter structure provided by the present application has the following beneficial effects: compared with the prior art, in the fuel pump filter structure provided by the present application, a bypass body is provided on the oil inlet pipe for delivering the fuel pumped by the fuel pump to the filter element, the bypass body forms a receiving cavity and a pressure relief hole that connects the receiving cavity to the oil inlet pipe, when the filter element is blocked and the fuel pressure in the oil inlet pipe is greater than the spring pressure, the valve core can move away from the pressure relief hole under the fuel pressure in the oil inlet pipe and open the pressure relief hole. In this way, the fuel delivered from the fuel pump can enter the receiving cavity formed by the bypass body and be discharged from the connecting hole connected to the receiving cavity and flow back to the barrel body, thereby effectively avoiding damage to the fuel pump filter element or the fuel pump working under high load, at the same time, when the impurities deposited on the filter element reach a certain amount and the fuel flowing back from the bypass body to the barrel body reaches a set flow rate, the valve core touches the moving distance increased to trigger the Hall switch, so that the Hall switch sends a signal to the driver to replace the filter element before it completely fails, thereby ensuring the normal operation of the fuel pump, the oil circuit and the engine, and extending the service life of related functional components, which is far superior to the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 A schematic diagram of the overall structure of the fuel pump filter structure provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the main structure of the fuel pump filter structure provided in an embodiment of the present application;

[0028] Figure 3 For along Figure 2 The cross-sectional structure diagram along the AA line;

[0029] Figure 4 For along Figure 3 Partial structural cross-section view along line BB.

[0030] Among them, the figure numerals in the figure are: 101, shell; 102, filter element; 103, oil inlet pipe; 104, oil outlet pipe; 105, bypass body; 106, accommodating chamber; 107, pressure relief hole; 108, connecting hole; 109, valve core; 110, spring; 111, guide block; 112, end cover; 113, air vent; 114, Hall switch; 115, barrel; 116, fuel pump; 117, rib; 118, upper cover; 119, support leg. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] Please also read Figures 1 to 4 Now, a fuel pump filter structure provided by an embodiment of the present application is described. The fuel pump filter structure includes a housing 101, a bypass body 105, a valve core 109 and a spring 110. Among them:

[0036] A filter element 102 for filtering fuel is arranged inside the housing 101, and an oil inlet pipe 103 and an oil outlet pipe 104 for outputting filtered fuel are also connected to the housing 101. The bypass body 105 forms a receiving chamber 106 and a pressure relief hole 107 that connects the receiving chamber 106 to the oil inlet pipe 103. The bypass body 105 also includes a connecting hole 108 that connects to the receiving chamber 106 and is used to discharge the fuel in the receiving chamber 106. The valve core 109 is movably installed in the receiving chamber 106 and is adapted to the pressure relief hole 107. The spring 110 abuts against the valve core 109 and presses the valve core 109 against the side wall of the receiving chamber 106 to close the pressure relief hole 107. The deformation direction of the spring 110 is parallel to the axial direction of the pressure relief hole 107.

[0037] According to the above structure provided in the present embodiment, in the fuel pump filtering structure provided in the present embodiment, a bypass body 105 is provided on the oil inlet pipe 103 for delivering the fuel pumped out by the fuel pump 116 to the filter element 102. The bypass body 105 forms a accommodating chamber 106 and a pressure relief hole 107 which connects the accommodating chamber 106 to the oil inlet pipe 103. When the filter element 102 is blocked and the fuel pressure in the oil inlet pipe 103 is greater than the pressure of the spring 110, the valve core 109 can move away from the pressure relief hole 107 and open the pressure relief hole 107 under the fuel pressure in the oil inlet pipe 103. In this way, the fuel delivered from the fuel pump 116 can enter the accommodating cavity 106 formed by the bypass body 105 and be discharged from the connecting hole 108 connected to the accommodating cavity 106 and flow back into the barrel body 115, thereby effectively preventing the fuel pump filter element 102 from being damaged or the fuel pump from working under high load. At the same time, when the impurities deposited on the filter element 102 reach a certain amount and the fuel flowing back from the bypass body 105 to the barrel body 115 reaches a set flow rate, the moving distance of the valve core 109 increases to trigger the Hall switch 114, so that the Hall switch 114 sends a signal to feedback to the driver to replace the filter element 109 before it completely fails, thereby ensuring the normal operation of the fuel pump, oil circuit and engine, and extending the service life of related functional components, which is far superior to the existing technology.

[0038] In another embodiment of the present application, please refer to Figures 1 to 4 The fuel pump filter structure also includes a guide block 111 disposed in the accommodating chamber 106. At least a portion of the valve core 109 passes through the guide block 111 and is slidably connected to the guide block 111. The sliding direction of the valve core 109 relative to the guide block 111 is parallel to the axial direction of the pressure relief hole 107. The two ends of the spring 110 along its own deformation direction are respectively abutted against the valve core 109 and the guide block 111. According to the above structure provided in this embodiment, the guide block 111 can provide a movable guide for the valve core 109. On the one hand, it can make the moving path of the valve core 109 in the accommodating chamber 106 more stable. On the other hand, it is also convenient for the valve core 109 to more stably return to the initial position and close the pressure relief hole 107 when the fuel pressure in the oil inlet pipe 103 drops, which is conducive to the fuel pump filter structure provided in this embodiment being able to be circulated for a long time.

[0039] In another embodiment of the present application, please refer to Figures 1 to 4, the guide block 111 divides the accommodating chamber 106 into two parts, the pressure relief hole 107 and the communicating hole 108 are arranged on the same side of the guide block 111, the part of the accommodating chamber 106 isolated from the pressure relief hole 107 is communicated with the atmosphere, and the valve core 109 is slidably and sealedly connected to the guide block 111. According to the above structure provided in this embodiment, the slidably and sealedly connected valve core 109 to the guide block 111 is conducive to forming a sealed cavity on the side of the guide block 111 close to the pressure relief hole 107, which can not only avoid the leakage of fuel in the accommodating chamber 106, but also enable the valve core 109 to move more smoothly relative to the guide block 111, which is conducive to significantly improving the use stability of the fuel pump filter structure provided in this embodiment.

[0040] In another embodiment of the present application, please refer to Figures 1 to 4 The bypass body 105 also has an end cover 112 for forming the accommodating chamber 106. The end cover 112 and the communicating hole 108 are distributed on both sides of the guide block 111. The end cover 112 is provided with an air vent 113. According to the above structure provided in this embodiment, the air vent 113 provided on the end cover 112 for forming the accommodating chamber 106 can not only make the part of the accommodating chamber 106 isolated from the pressure relief hole 107 communicate with the atmosphere, but also well prevent impurities from entering the accommodating chamber 106, which is conducive to the long-term stable use of the fuel pump filter structure provided in this embodiment.

[0041] In another embodiment of the present application, please refer to Figures 1 to 4 The fuel pump filter structure also includes a Hall switch 114 disposed in the accommodating chamber 106 and connected to the end cover 112. The Hall switch 114 is located on the moving path of the valve core 109 and can be triggered by the valve core 109 to generate an alarm signal. According to the above structure provided in this embodiment, the Hall switch 114 located on the moving path of the valve core 109 can be triggered by the valve core 109 and send an alarm signal, that is, when the fuel flowing back to the barrel 115 through the pressure relief hole 107 reaches the set flow rate, the distance that the fuel pushes the valve core 109 to move increases. When the distance is large enough to trigger the Hall switch 114, the Hall switch 114 is triggered by the valve core 109 and sends an alarm signal, so that the driver can quickly learn about the blockage of the filter element 109 and deal with it in time, which is conducive to making the fuel pump filter structure provided in this embodiment have a better use effect. It can be understood that the signal line of the Hall switch 114 and its electrical connection with the driving position can adopt the existing wire connection technology of the fuel pump.

[0042] In another embodiment of the present application, please refer to Figures 1 to 4The fuel pump filter structure also includes a barrel 115 for containing fuel and a fuel pump 116 capable of pumping fuel out of the barrel 115, and the containing chamber 106 is connected to the barrel 115 through the connecting hole 108. According to the above structure provided in this embodiment, the fuel entering the containing chamber 106 can flow back into the barrel 115 through the connecting hole 108, which can not only avoid adding an extra container to contain the fuel discharged from the containing chamber 106, but also enable the fuel to be quickly recycled, which is conducive to making the fuel pump filter structure provided in this embodiment have a better use effect.

[0043] In another embodiment of the present application, please refer to Figures 1 to 4 The housing 101 is integrally formed with the barrel 115. According to the above structure provided in this embodiment, the housing 101 integrally formed with the barrel 115 can have better position stability, which is conducive to the fuel pump filter structure provided in this embodiment being able to be used stably for a long time.

[0044] In another embodiment of the present application, please refer to Figures 1 to 4 The surface of the housing 101 is provided with ribs 117 for strengthening the structural strength of the housing 101. According to the above structure provided in this embodiment, the ribs 117 provided on the housing 101 can significantly increase the structural strength of the housing 101, which is conducive to the fuel pump filter structure provided in this embodiment being able to be used stably for a long time.

[0045] In another embodiment of the present application, please refer to Figures 1 to 4 The fuel pump filter structure further includes an upper cover 118 detachably connected to the housing 101. The upper cover 118 cooperates with the housing 101 to form a cavity for accommodating the filter element 102. The oil inlet pipe 103 and the oil outlet pipe 104 are connected to the upper cover 118. According to the above structure provided in this embodiment, the upper cover 118 detachably connected to the housing 101 can significantly improve the convenience of replacing the filter element 102, which is conducive to making the fuel pump filter structure provided in this embodiment more convenient to maintain.

[0046] In another embodiment of the present application, please refer to Figures 1 to 4 The fuel pump filter structure further includes a support leg 119 injection-molded on the upper cover 118, and the bypass body 105 is mounted on and supported by the support leg 119. According to the above structure provided in this embodiment, the bypass body 105 supported by the support leg 119 can have better position stability relative to the housing 101, which is conducive to the fuel pump filter structure provided in this embodiment being able to be used stably for a long time.

[0047] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A fuel pump filter structure, characterized in that: include: A housing (101) is provided with a filter element (102) for filtering fuel inside, and the housing (101) is also connected to an oil inlet pipe (103) and an oil outlet pipe (104) for outputting filtered fuel; A bypass body (105) is formed with a receiving chamber (106) and a pressure relief hole (107) that connects the receiving chamber (106) to the oil inlet pipe (103); the bypass body (105) further includes a connecting hole (108) that is connected to the receiving chamber (106) and is used to discharge the fuel in the receiving chamber (106); A valve core (109) movably mounted in the accommodating chamber (106) and adapted to fit the pressure relief hole (107); The spring (110) abuts against the valve core (109) and presses the valve core (109) against the side wall of the accommodating chamber (106) to close the pressure relief hole (107); the deformation direction of the spring (110) is parallel to the axial direction of the pressure relief hole (107).

2. The fuel pump filter structure according to claim 1, characterized in that: The fuel pump filter structure further comprises a guide block (111) arranged in the accommodating cavity (106), at least a portion of the valve core (109) passes through the guide block (111) and is slidably connected to the guide block (111), and a sliding direction of the valve core (109) relative to the guide block (111) is parallel to an axial direction of the pressure relief hole (107); Two ends of the spring (110) along its own deformation direction abut against the valve core (109) and the guide block (111) respectively.

3. The fuel pump filter structure according to claim 2, characterized in that: The guide block (111) divides the accommodating chamber (106) into two parts, the pressure relief hole (107) and the communication hole (108) are arranged on the same side of the guide block (111), and the part of the accommodating chamber (106) isolated from the pressure relief hole (107) is connected to the atmosphere; The valve core (109) is slidably and sealingly connected to the guide block (111).

4. The fuel pump filter structure according to claim 3, characterized in that: The bypass body (105) further comprises an end cover (112) for forming the accommodating cavity (106), and the end cover (112) and the communicating hole (108) are distributed on both sides of the guide block (111); The end cover (112) is provided with a vent hole (113).

5. The fuel pump filter structure according to claim 4, characterized in that: The fuel pump filter structure further comprises a Hall switch (114) disposed in the accommodating cavity (106) and connected to the end cover (112); The Hall switch (114) is located on the moving path of the valve core (109) and can be triggered by the valve core (109) to generate an alarm signal.

6. The fuel pump filter structure according to claim 1, characterized in that: The fuel pump filter structure further comprises a barrel (115) for containing fuel and a fuel pump (116) capable of pumping fuel out of the barrel (115); The accommodating chamber (106) is in communication with the barrel body (115) via the communicating hole (108).

7. The fuel pump filter structure according to claim 6, characterized in that: The shell (101) and the barrel body (115) are integrally formed.

8. The fuel pump filter structure according to claim 7, characterized in that: The surface of the shell (101) is provided with ribs (117) for enhancing the structural strength of the shell (101).

9. The fuel pump filter structure according to claim 8, characterized in that: The fuel pump filter structure further comprises an upper cover (118) detachably connected to the housing (101), wherein the upper cover (118) cooperates with the housing (101) to form a cavity for accommodating the filter element (102); The oil inlet pipe (103) and the oil outlet pipe (104) are connected to the upper cover (118).

10. The fuel pump filter structure according to claim 9, characterized in that: The fuel pump filter structure further comprises a support leg (119) injection-molded on the upper cover (118), and the bypass body (105) is mounted on the support leg (119) and supported by the support leg (119).

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