Mounting and sealing structure of fuel pump

Abstract

The installation sealing structure of the fuel pump is applied to the field of fuel pump installation and comprises an oil tank, the top of the oil tank is fixedly connected with a threaded opening, the surface of the threaded opening is in threaded connection with a threaded cover, a first sealing gasket is arranged in the threaded cover, and the bottom of the first sealing gasket makes contact with the fuel pump. The surface of the threaded cover is fixedly sleeved with a connecting ring, and the top of the connecting ring makes contact with a limiting square rod. The threaded opening is formed in the surface of the threaded cover, the fixing pipe is arranged, the limiting square rod is arranged in the fixing pipe, after the threaded cover and the threaded opening are installed in a threaded mode, the limiting square rod can be pressed on the top of the connecting ring, and under the action of the first spring, the limiting square rod cannot be separated from the connecting ring without being pulled by external force; and the threaded cover can be effectively limited, the situation that the threaded cover is loosened due to vibration to cause sealing failure is avoided, and the sealing performance of the fuel pump after installation is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of fuel pump installation, in particular to a fuel pump installation sealing structure. Background Art

[0002] Fuel pump is a professional term in the auto parts industry. It is one of the basic components of the fuel injection system of electronic fuel injection vehicles and is located inside the vehicle's fuel tank.

[0003] The current fuel pump needs to be installed inside the fuel tank, and the sealing structure for the fuel pump installation is only to place a sealing ring between the threaded cover and the top of the fuel pump, and to lock the threaded cover and the installation threaded port of the fuel tank;

[0004] Although sealing can be achieved by adopting the above method, the fuel pump will vibrate during use. If the mobile phone is used in a long-term vibration environment, the threaded cover is prone to rotation, which will cause the threaded cover used to suppress the fuel pump to easily loosen from the threaded opening of the fuel tank, thereby causing sealing failure.

[0005] In order to solve the above problems, we propose a fuel pump installation sealing structure. Utility Model Content

[0006] The utility model aims to provide a fuel pump installation sealing structure, which has the advantage of being able to lock a threaded cover to prevent the threaded cover from loosening when used in a vibration environment.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions: a fuel pump installation sealing structure, comprising a fuel tank, a threaded opening fixedly connected to the top of the fuel tank, a threaded cover threadedly connected to the surface of the threaded opening, a sealing gasket 1 arranged inside the threaded cover, the bottom of the sealing gasket 1 contacts the fuel pump, a connecting ring fixedly sleeved on the surface of the threaded cover, the top of the connecting ring contacts the limiting square rod, the surface of the limiting square rod is sleeved with a first spring, the surface of the connecting ring is sleeved with a fixed pipe fixedly connected to the fuel tank, the interior of the fixed pipe is also slidably connected to the surface of the limiting square rod, one end of the first spring is fixedly connected to the fixed pipe through a spring fixing member, and the other end of the first spring is fixedly connected to a fixed plate fixedly sleeved with the limiting square rod through a spring fixing member; a mounting seat is fixedly connected to the bottom of the inner cavity of the fuel tank, a sealing ring is sealingly and slidably connected to the inner cavity of the mounting seat, a movable seat is fixedly sleeved inside the sealing ring, the top of the movable seat contacts the bottom of the fuel pump, a second spring is arranged inside the mounting seat, and the top and bottom ends of the second spring are respectively fixedly connected to the movable seat and the bottom of the inner cavity of the fuel tank through a spring fixing member.

[0008] By adopting the above technical solution, a limiting square rod, a threaded opening, a fixed tube and a first spring are provided, and the limiting square rod is used to limit the top of the threaded opening, so as to prevent the threaded opening and the threaded cover from rotating under vibration, thereby preventing the threaded connection from loosening. By providing a mounting seat, a sealing ring, a movable seat and a second spring, when the fuel pump is disassembled, the second spring rebounds and resets to push the fuel pump out of the fuel tank, thereby facilitating disassembly.

[0009] The utility model is further configured as follows: a circular ring groove is provided on the surface of the threaded cover, and the inside of the circular ring groove is clamped with one end of the limiting square rod.

[0010] By adopting the above technical solution, through the setting of the circular ring groove, the limiting square rod is inserted into the inside of the circular ring groove, which can play a dual limiting role on the threaded opening. First, the limiting square rod is pressed on the top of the threaded opening to prevent the threaded opening from moving upward; second, the limiting square rod is inserted into the inside of the circular ring groove to prevent the threaded cover from moving upward.

[0011] The utility model is further configured as follows: a clamping groove is provided inside the limiting square rod, and a limiting rod clamped with the clamping groove is provided on the top of the limiting square rod.

[0012] By adopting the above technical solution, through the arrangement of the card slot and the limiting rod, when the card slot and the limiting rod correspond to each other, the limiting rod will slide downward and be inserted into the card slot to limit the limiting square rod.

[0013] The utility model is further configured as follows: the surface of the fixed pipe is fixedly connected with two connection blocks, and the interior of the connection block is slidably connected with the surface of the limiting rod.

[0014] By adopting the above technical solution, the connecting block and the limiting rod are slidably connected, so that the limiting rod can move linearly up and down.

[0015] The utility model is further configured as follows: a sealing groove is provided on the top of the threaded opening, and a second sealing gasket is clamped inside the sealing groove.

[0016] The above technical solution is adopted to increase the sealing performance between the threaded port and the fuel pump by arranging the sealing groove and the second sealing gasket.

[0017] The utility model is further configured as follows: a receiving groove is provided inside the fixing tube, and the first spring is located inside the receiving groove.

[0018] By adopting the above technical solution and setting the receiving groove, the first spring can be easily compressed and rebounded.

[0019] The utility model is further configured as follows: a through hole is opened on the top of the mounting seat.

[0020] The above technical solution is adopted to discharge the pressure generated by the movable seat and the sealing ring when the second spring rebounds through the provision of the through hole.

[0021] In summary, the utility model has the following beneficial effects:

[0022] 1. The utility model provides a threaded opening on the surface of the threaded cover, provides a fixing tube and provides a limiting square rod inside the fixing tube. After the threaded cover and the threaded opening are threadedly installed, the limiting square rod can be pressed on the top of the connecting ring. Under the action of the first spring, the limiting square rod will not be separated from the connecting ring without external force pulling, which can effectively limit the threaded cover and prevent the threaded cover from loosening due to vibration and causing sealing failure, thereby ensuring the sealing of the fuel pump after installation;

[0023] 2. The utility model arranges a mounting seat, a sealing ring, a movable seat and a second spring inside the fuel tank. When the fuel pump is installed, the second spring is pressed down to be compressed. When the fuel pump is disassembled, the top of the fuel pump loses the pressure of the threaded cover, and the second spring rebounds and resets to push the fuel pump upward, thereby making it convenient for personnel to draw the fuel pump out of the fuel tank and facilitating the disassembly of the fuel pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the structure of the utility model;

[0025] Figure 2 It is a cross-sectional view of the structure of the utility model;

[0026] Figure 3 This utility model Figure 2 A magnified view of the structure at center;

[0027] Figure 4 This utility model Figure 2 A magnified view of the structure at B in the middle;

[0028] Figure 5 It is an enlarged sectional view of the local structure of the utility model.

[0029] Figure numerals: 1, fuel tank; 2, threaded opening; 3, threaded cover; 4, sealing gasket 1; 5, fuel pump; 6, connecting ring; 7, limiting square rod; 8, first spring; 9, fixing pipe; 10, mounting seat; 11, sealing ring; 12, movable seat; 13, second spring; 14, annular groove; 15, slot; 16, limiting rod; 17, connecting block; 18, sealing groove; 19, sealing gasket 2; 20, storage groove; 21, through hole; 22, fixing plate. DETAILED DESCRIPTION

[0030] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0031] Embodiment 1:

[0032] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A fuel pump installation sealing structure comprises a fuel tank 1, a threaded port 2 is fixedly connected to the top of the fuel tank 1, a threaded cover 3 is threadedly connected to the surface of the threaded port 2, a sealing gasket 4 is arranged inside the threaded cover 3, a fuel pump 5 is contacted at the bottom of the sealing gasket 4, a connecting ring 6 is fixedly sleeved on the surface of the threaded cover 3, the top of the connecting ring 6 contacts the limiting square rod 7, a first spring 8 is sleeved on the surface of the limiting square rod 7, a fixing pipe 9 fixedly connected to the fuel tank 1 is sleeved on the surface of the connecting ring 6, the inside of the fixing pipe 9 is also slidably connected to the surface of the limiting square rod 7, one end of the first spring 8 is fixedly connected to the fixing pipe 9 through a spring fixing member, and the other end of the first spring 8 is fixedly connected to a fixing plate 22 fixedly sleeved with the limiting square rod 7 through a spring fixing member; a mounting seat 10 is fixedly connected to the bottom of the inner cavity of the fuel tank 1, a sealing ring 11 is sealingly and slidably connected to the inside of the mounting seat 10, a movable seat 12 is fixedly sleeved inside the sealing ring 11, the top of the movable seat 12 contacts the bottom of the fuel pump 5, a second spring 1 is arranged inside the mounting seat 10 3, the top and bottom ends of the second spring 13 are fixedly connected to the movable seat 12 and the bottom of the inner cavity of the fuel tank 1 respectively through the spring fixing member; by arranging the threaded opening 2 on the surface of the threaded cover 3, by arranging the fixing tube 9 and arranging the limiting square rod 7 inside the fixing tube 9, after the threaded cover 3 and the threaded opening 2 are threadedly installed, the limiting square rod 7 can be pressed on the top of the connecting ring 6, and under the action of the first spring 8, the limiting square rod 7 will not be separated from the connecting ring 6 without external force pulling, which can effectively limit the threaded cover 3, avoid the threaded cover 3 from loosening due to vibration and causing sealing failure, and ensure the sealing of the fuel pump 5 after installation; by arranging the mounting seat 10, the sealing ring 11, the movable seat 12 and the second spring 13 inside the fuel tank 1, the second spring 13 is pressed down when the fuel pump 5 is installed to be compressed, and when the fuel pump 5 is disassembled, the top of the fuel pump 5 loses the pressure of the threaded cover 3, and the second spring 13 rebounds and resets to push the fuel pump 5 upward, so that it is convenient for personnel to draw the fuel pump 5 out of the fuel tank 1 and facilitate the disassembly of the fuel pump 5.

[0033] Furthermore, a circular ring groove 14 is provided on the surface of the threaded cover 3, and the interior of the circular ring groove 14 is clamped with one end of the limiting square rod 7. Through the setting of the circular ring groove 14, the limiting square rod 7 is clamped into the interior of the circular ring groove 14, which can play a dual limiting role on the threaded opening 2. First, the limiting square rod 7 is pressed on the top of the threaded opening 2 to prevent the threaded opening 2 from moving upward; second, the limiting square rod 7 is clamped into the interior of the circular ring groove 14 to prevent the threaded cover 3 from moving upward.

[0034] Furthermore, a slot 15 is provided inside the limiting square rod 7 , and a limiting rod 16 which is engaged with the slot 15 is provided on the top of the limiting square rod 7 . A slot 15 is provided inside the limiting square rod 7 , and a limiting rod 16 which is engaged with the slot 15 is provided on the top of the limiting square rod 7 .

[0035] Furthermore, two connecting blocks 17 are fixedly connected to the surface of the fixed tube 9, and the interior of the connecting block 17 is slidably connected to the surface of the limiting rod 16. The connecting block 17 and the limiting rod 16 are slidably connected, so that the limiting rod 16 can move linearly up and down.

[0036] Furthermore, a sealing groove 18 is provided at the top of the threaded port 2, and a sealing gasket 19 is clamped inside the sealing groove 18. The sealing groove 18 and the sealing gasket 19 are arranged to increase the sealing between the threaded port 2 and the fuel pump 5.

[0037] Furthermore, a receiving groove 20 is provided inside the fixing tube 9 , and the first spring 8 is located inside the receiving groove 20 . The provision of the receiving groove 20 facilitates the compression and rebound reset of the first spring 8 .

[0038] Furthermore, a through hole 21 is provided on the top of the mounting seat 10 , and the through hole 21 is used to discharge the pressure generated by the movable seat 12 and the sealing ring 11 when the second spring 13 rebounds.

[0039] Brief description of the use process: during installation, first pull the two limiting square rods 7 outward in sequence, so that the limiting square rod 7 drives the fixing plate 22 to squeeze the first spring 8 so that the first spring 8 is in a compressed state, and wait for the internal slot 15 of the limiting square rod 7 to correspond to the limiting rod 16, and the limiting rod 16 slides down and snaps into the internal slot 15 to limit the limiting square rod 7;

[0040] Insert the sealing gasket 2 19 into the sealing groove 18, insert the fuel pump 5 into the fuel tank 1, place the sealing gasket 1 4 on the top of the fuel pump 5, place the threaded cover 3 on the top of the fuel pump 5, install the threaded cover 3 downward, so that the threaded cover 3 pushes the fuel pump 5 downward to press the movable seat 12 and the second spring 13, so that the second spring 13 is compressed, and then the threaded cover 3 and the threaded port 2 are completely threadedly connected;

[0041] Then, the two limiting rods 16 are pulled up in sequence to separate the limiting rods 16 from the card slot 15. After the limiting rods 16 and the card slot 15 are separated, the compressed first spring 8 pushes the fixing plate 22 and the limiting square rod 7 to rebound and reset. The limiting square rod 7 reaches the top of the connecting ring 6 to limit the connecting ring 6. At the same time, the limiting square rod 7 is clamped into the annular groove 14.

[0042] When in use, when vibration occurs, the two limiting square rods 7 can limit the connecting ring 6 and the threaded cover 3 to prevent the threaded cover 3 from loosening due to vibration;

[0043] If it is to be disassembled, pull the two limiting square rods 7 in turn, and limit the limiting square rods 7 by clamping the limiting rod 16 into the inner part of the card slot 15, so as to separate the threaded cover 3 and the threaded opening 2. After the threaded cover 3 and the threaded opening 2 are separated, the compressed second spring 13 pushes the movable seat 12 and the fuel pump 5 to reset. When the second spring 13 is completely reset, the top of the fuel pump 5 will extend out of the interior of the fuel tank 1, so that it is convenient for personnel to pull it out.

[0044] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A fuel pump installation sealing structure, comprising a fuel tank (1), characterized in that: The top of the oil tank (1) is fixedly connected with a threaded opening (2), the surface of the threaded opening (2) is threadedly connected with a threaded cover (3), a sealing gasket (4) is provided inside the threaded cover (3), the bottom of the sealing gasket (4) contacts a fuel pump (5), a connecting ring (6) is fixedly sleeved on the surface of the threaded cover (3), the top of the connecting ring (6) contacts a limiting square rod (7), the surface of the limiting square rod (7) is sleeved with a first spring (8), the surface of the connecting ring (6) is sleeved with a fixing pipe (9) fixedly connected to the oil tank (1), one end of the first spring (8) is fixedly connected to the fixing pipe (9) through a spring fixing member, The other end of the first spring (8) is fixedly connected to a fixed plate (22) fixedly sleeved with the limiting square rod (7) through a spring fixing member; the bottom of the inner cavity of the fuel tank (1) is fixedly connected to a mounting seat (10); the interior of the mounting seat (10) is sealingly and slidably connected to a sealing ring (11); the interior of the sealing ring (11) is fixedly sleeved with a movable seat (12); the top of the movable seat (12) contacts the bottom of the fuel pump (5); a second spring (13) is provided inside the mounting seat (10); the top and bottom ends of the second spring (13) are respectively fixedly connected to the movable seat (12) and the bottom of the inner cavity of the fuel tank (1) through a spring fixing member.

2. A fuel pump installation sealing structure according to claim 1, characterized in that: A circular ring groove (14) is provided on the surface of the threaded cover (3), and the interior of the circular ring groove (14) is clamped with one end of the limiting square rod (7).

3. The fuel pump installation sealing structure according to claim 1, characterized in that: A clamping groove (15) is provided inside the limiting square rod (7), and a limiting rod (16) is provided on the top of the limiting square rod (7) and is clamped with the clamping groove (15).

4. A fuel pump installation sealing structure according to claim 3, characterized in that: Two connection blocks (17) are fixedly connected to the surface of the fixed tube (9), and the interior of the connection block (17) is slidably connected to the surface of the limiting rod (16).

5. The fuel pump installation sealing structure according to claim 1, characterized in that: A sealing groove (18) is provided at the top of the threaded opening (2), and a second sealing gasket (19) is clamped inside the sealing groove (18).

6. A fuel pump installation sealing structure according to claim 1, characterized in that: A receiving groove (20) is provided inside the fixing tube (9), and the first spring (8) is located inside the receiving groove (20).

7. The fuel pump installation sealing structure according to claim 1, characterized in that: A through hole (21) is formed on the top of the mounting seat (10).

Images