Rear cover of electric fuel pump of automobile

Abstract

The utility model relates to the technical field of rear covers of fuel pumps, and discloses a rear cover of an electric fuel pump of an automobile, an upper pipe orifice is welded on the upper surface of an antiskid stop block, a plurality of limiting grooves are welded on the outer wall of the upper pipe orifice, a plurality of limiting grooves are arranged on the outer wall of the periphery of the top of the upper pipe orifice, and clamping rings are connected on the inner walls of the plurality of limiting grooves in a sliding manner. According to the utility model, through the arrangement of the pipe orifice and the clamping ring, the two positive and negative electrode interfaces are sleeved outside the lower pipe orifice, the nuts are in threaded connection with the lower pipe orifice, so that the positive and negative electrode interfaces are fixed on the fastening structure, the cable is sleeved outside the upper pipe orifice, the clamping ring is sleeved at the position of the limiting groove, and the clamping ring extends to the outer wall of the upper pipe orifice through the limiting groove; and finally, the nut is connected with the threaded strip, the exterior of the cable is wrapped and limited by the tightening opening of the nut, and the cable is fixedly connected with the positive and negative electrode interfaces.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel pump rear cover equipment, in particular to a rear cover of an automobile electric fuel pump. Background Art

[0002] Domestic and foreign automobile fuel pumps are installed in the fuel tank. The fuel pump rear cover device is an important part of the fuel pump to effectively control the output fuel flow and pressure stability. The current automobile fuel pump rear cover device has the following shortcomings: 1. The reverse leakage of the output oil is large, which affects the output oil flow and pressure. In turn, it affects the work of the fuel pressure regulator. 2. The stability of the spring is poor. 3. The pressure relief valve has a complex structure, which is not conducive to assembly, and the pressure relief pressure cannot be adjusted before installation.

[0003] The application number is CN200520020582.6, which discloses a rear cover device for a fuel pump for an automobile. A partition is provided in the middle part of the cover body, dividing the cavity of the cover body into an upper cavity and a lower cavity, and a boss is provided on the right side of the lower cavity. A check valve spring frame with a boss at the bottom is installed in the middle and upper part of the upper cavity, and a square hole is opened in the boss, and a square column of a check valve core with a flange is inserted in the square hole. A check valve spring is sandwiched between the boss and the flange. The lower end of the flange of the check valve core is in a hemispherical shape and is connected to the corresponding chamfer of the cavity. A through hole is opened in the right side boss of the lower cavity, and a pressure relief valve spring and a pressure relief valve stopper sleeve with a circular hole in the middle are buried therein, and a pressure relief valve ball is pressed against the circular hole of the pressure relief valve spring and the pressure relief valve stopper sleeve. The utility model has a simple structure and reliable performance, and the overflowed fuel directly returns to the fuel tank.

[0004] The above document discloses a rear cover device for a fuel pump for an automobile with the following defects: the power connection of the fuel pump needs to be connected to a cable for power to work, and the device is not provided with a fixing structure for the cable and the connection port. If the cable is accidentally touched and knocked off during operation, it will affect the overall operation of the fuel pump, so the fuel pump has a little instability.

[0005] It can be seen from this that the existing fuel pump rear cover device does not have the function of making the fuel pump run more stably, and it is necessary to improve the existing deficiencies and provide a function that can strengthen the interface and cable connection to make the operation more stable. Utility Model Content

[0006] The purpose of the utility model is to provide a rear cover of an automobile electric fuel pump to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0008] The utility model is a rear cover of an automobile electric fuel pump, comprising a fuel pump body, a rear cover and a fastening structure, wherein the rear cover is welded to the top outer wall of the fuel pump body, two fastening structures are threadedly connected to the top outer wall of the rear cover, the two fastening structures comprise an anti-skid stopper, an upper pipe opening is welded to the upper surface of the anti-skid stopper, a plurality of limiting grooves are welded to the outer wall of the upper pipe opening, a plurality of limiting grooves are opened on the outer walls around the top of the upper pipe opening, and clamping rings are slidably connected to the inner walls of the plurality of limiting grooves. The purpose of such arrangement is that, during the use of the oil pump, the two positive and negative electrode interfaces are sleeved on the outside of the lower pipe mouth, and the positive and negative electrode interfaces are fixed on the fastening structure through the nut and the threaded connection of the lower pipe mouth, the cable is sleeved on the outside of the upper pipe mouth, and the clamping ring is inserted into the limiting groove, and the clamping ring extends to the outer wall of the upper pipe mouth through the limiting groove. Such a design increases the friction between the contact surface of the pipe mouth and the cable, making it difficult for the cable to fall off, and finally the nut is connected to the threaded strip, the outside of the cable is wrapped and limited by the tightening mouth of the nut, and the cable is fixedly connected to the positive and negative electrode interfaces through the fastening structure. At this time, the fuel pump body starts to operate, and the fuel flows into the pump through the oil inlet pipe, the filter plate filters the fuel, and then the fuel enters the filter element upward, and the magnet acts on the filter element to drive the fuel in the filter element upward, and finally the fuel flows out through the oil outlet pipe.

[0009] Furthermore, a lower pipe opening is welded to the lower surface of the anti-slip stopper, a thread is provided on the outer wall of the lower pipe opening, and a nut is sleeved on the outer side of the end away from the upper pipe opening and the lower pipe opening. The purpose of this arrangement is that during the use of the oil pump, the two positive and negative electrode interfaces are sleeved on the outside of the lower pipe opening, and the positive and negative electrode interfaces are fixed by the nut and the threaded connection with the lower pipe opening.

[0010] Furthermore, threads are provided on the inner walls of the two nuts, and the two nuts are connected to the outer walls of the lower pipe opening and the threaded strip through threads, and rubber rings are welded to one end of the two nuts near the lower pipe opening and the upper pipe opening. The purpose of this arrangement is that during the use of the oil pump, the rubber rings provide anti-fatigue protection for the outer walls of the nuts and the anti-slip block, connect the nuts to the threaded strip, and the outer part of the cable is wrapped and limited by the tightening opening of the nut, so that the cable is fixed to the fastening structure.

[0011] Furthermore, the fuel pump body includes a shell, an oil inlet pipe is provided on the bottom inner wall of the shell, a filter element is provided inside the shell near the oil inlet pipe, a plurality of filter screens are sleeved on the bottom outer wall of the filter element, and magnets are provided on the inner walls of the shell near the filter element. The purpose of this arrangement is that during the use of the oil pump, the fuel flows into the pump through the oil inlet pipe, the filter screen filters the fuel, and then the fuel flows upward into the filter element, the magnet acts on the filter element to drive the fuel in the filter element upward, and finally the fuel flows out through the oil outlet pipe.

[0012] Furthermore, a cover is welded on the top outer wall of the shell, an oil outlet pipe is opened on the inner wall of the cover, and two positive and negative interfaces are welded on the inner wall of the cover. The purpose of this arrangement is that during the use of the oil pump, the magnet acts on the filter element to drive the fuel in the filter element upward, and finally the fuel flows out through the oil outlet pipe, and the positive and negative interfaces are connected to the cable to be energized, and the electricity drives the magnet to produce a magnetic attraction on the filter element.

[0013] Furthermore, the positive and negative electrode interfaces are sleeved on the top outer wall of the lower pipe opening, and the nut at the lower pipe opening is sleeved on the outer wall of the positive and negative electrode interfaces. The purpose of this arrangement is that during the use of the oil pump, the two positive and negative electrode interfaces are sleeved on the outside of the lower pipe opening, and the positive and negative electrode interfaces are fixed to the fastening structure through the nut and the threaded connection with the lower pipe opening.

[0014] The utility model has the following beneficial effects:

[0015] (1) The utility model sets the pipe mouth and the clamp ring to sleeve the two positive and negative electrode interfaces on the outside of the lower pipe mouth, and fix the positive and negative electrode interfaces on the fastening structure by connecting the nut with the lower pipe mouth through the thread. The cable is sleeved on the outside of the upper pipe mouth, and the clamp ring is inserted into the limit groove. The clamp ring extends to the outer wall of the upper pipe mouth through the limit groove. This design increases the friction between the contact surface of the pipe mouth and the cable, making it difficult for the cable to fall off. Finally, the nut is connected to the threaded strip, and the outside of the cable is wrapped and limited by the tightening mouth of the nut. The cable is fixedly connected to the positive and negative electrode interfaces through the fastening structure.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the split structure of the fastening structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the main structure of the fastening structure of the utility model;

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] In the figure: 1. fuel pump body; 101. outer shell; 102. oil inlet pipe; 103. filter plate; 104. filter element; 105. magnet; 2. rear cover; 201. cover body; 202. oil outlet pipe; 203. positive and negative electrode interfaces; 3. fastening structure; 301. nut; 302. thread; 303. rubber ring; 304. anti-slip block; 305. lower pipe opening; 306. upper pipe opening; 307. limit groove; 308. clamping ring; 309. thread strip. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1 - Figure 4 As shown, the utility model is a rear cover of an automobile electric fuel pump, comprising a fuel pump body 1, a rear cover 2 and a fastening structure 3, the rear cover 2 is welded to the top outer wall of the fuel pump body 1, two fastening structures 3 are threadedly connected to the top outer wall of the rear cover 2, the two fastening structures 3 include an anti-skid stopper 304, an upper pipe mouth 306 is welded to the upper surface of the anti-skid stopper 304, a plurality of limiting grooves 307 are welded to the outer wall of the upper pipe mouth 306, a plurality of limiting grooves 307 are opened on the outer walls around the top of the upper pipe mouth 306, and a plurality of clamping rings 308 are slidably connected to the inner walls of the plurality of limiting grooves 307. The purpose of such arrangement is that, during the use of the oil pump, the two positive and negative electrode interfaces 203 are sleeved on the outside of the lower pipe mouth 305, and the positive and negative electrode interfaces 203 are fixed to the fastening structure 3 through the nut 301 and the lower pipe mouth 305 threaded connection, and the cable is sleeved on the outside of the upper pipe mouth 306, and the clamping ring 308 is inserted into the limiting groove 307. The clamping ring 308 extends to the outer wall of the upper pipe mouth 306 through the limiting groove 307. This design increases the friction between the contact surface of the upper pipe mouth 306 and the cable, so that the cable The nut 301 is not easy to fall off, and finally the nut 301 is connected to the threaded strip 309. The outside of the cable is wrapped and limited by the tightening mouth of the nut 301. The cable is fixedly connected to the positive and negative electrode interfaces 203 through the fastening structure 3. At this time, the fuel pump body 1 starts to operate, and the fuel flows into the pump through the oil inlet pipe 102. The filter plate 103 filters the fuel, and then the fuel goes up into the filter element 104. The magnet 105 magnetically attracts the filter element 104 to drive the fuel in the filter element 104 upward, and finally the fuel flows out through the oil outlet pipe 202.

[0026] A lower pipe opening 305 is welded to the lower surface of the anti-slip stopper 304, a thread 302 is provided on the outer wall of the lower pipe opening 305, and a nut 301 is sleeved on the outer side of the upper pipe opening 306 and the end away from the lower pipe opening 305. The purpose of this arrangement is that during the use of the oil pump, the two positive and negative electrode interfaces 203 are sleeved on the outside of the lower pipe opening 305, and the positive and negative electrode interfaces 203 are fixed by threading the nut 301 with the lower pipe opening 305.

[0027] The inner walls of the two nuts 301 are provided with threads 302, and the two nuts 301 are threadedly connected to the outer walls of the lower pipe opening 305 and the thread strip 309 through the threads 302. The ends of the two nuts 301 close to the lower pipe opening 305 and the upper pipe opening 306 are welded with rubber rings 303. The purpose of such a setting is that during the use of the oil pump, the rubber ring 303 provides anti-fatigue protection for the outer walls of the nuts 301 and the anti-slip block 304, connects the nuts 301 with the thread strip 309, and the outer part of the cable is wrapped and limited by the tightening mouth of the nut 301, so that the cable is fixed on the fastening structure 3.

[0028] The fuel pump body 1 comprises a housing 101, an oil inlet pipe 102 is provided on the bottom inner wall of the housing 101, a filter element 104 is provided inside the housing 101 near the oil inlet pipe 102, a plurality of filter screens 103 are sleeved on the bottom outer wall of the filter element 104, and magnets 105 are provided on the inner walls of the housing 101 near the filter element 104. The purpose of such arrangement is that during the use of the oil pump, the fuel flows into the pump through the oil inlet pipe 102, the filter screen 103 filters the fuel, and then the fuel flows upward into the filter element 104, the magnet 105 acts as a magnetic attraction on the filter element 104 to drive the fuel in the filter element 104 upward, and finally the fuel flows out through the oil outlet pipe 202.

[0029] A cover 201 is welded on the top outer wall of the housing 101, an oil outlet pipe 202 is provided on the inner wall of the cover 201, and two positive and negative interfaces 203 are welded on the inner wall of the cover 201. The purpose of such a configuration is that during the use of the oil pump, the magnet 105 acts as a magnetic attraction on the filter element 104 to drive the fuel in the filter element 104 upward, and finally the fuel flows out through the oil outlet pipe 202, and the positive and negative interfaces 203 are connected to the cable to be energized, and the electricity drives the magnet 105 to produce a magnetic attraction on the filter element 104.

[0030] The positive and negative electrode interfaces 203 are sleeved on the top outer wall of the lower pipe opening 305, and the nut 301 at the lower pipe opening 305 is sleeved on the outer wall of the positive and negative electrode interfaces 203. The purpose of this arrangement is that during the use of the oil pump, the two positive and negative electrode interfaces 203 are sleeved on the outside of the lower pipe opening 305, and the positive and negative electrode interfaces 203 are fixed on the fastening structure 3 through the nut 301 and the lower pipe opening 305.

[0031] When in use, during the use of the oil pump, the two positive and negative electrode interfaces 203 are sleeved on the outside of the lower pipe mouth 305, and the positive and negative electrode interfaces 203 are fixed to the fastening structure 3 through the nut 301 and the lower pipe mouth 305. The cable is sleeved on the outside of the upper pipe mouth 306, and the clamping ring 308 is inserted into the limiting groove 307. The clamping ring 308 extends to the outer wall of the upper pipe mouth 306 through the limiting groove 307. This design increases the friction between the contact surface of the upper pipe mouth 306 and the cable, making it difficult for the cable to come off The nut 301 is finally connected to the threaded strip 309, the outside of the cable is wrapped and limited by the tightening mouth of the nut 301, and the cable is fixedly connected to the positive and negative electrode interfaces 203 through the fastening structure 3. At this time, the fuel pump body 1 starts to operate, and the fuel flows into the pump through the oil inlet pipe 102. The filter plate 103 filters the fuel, and then the fuel goes up into the filter element 104. The magnet 105 magnetically attracts the filter element 104 to drive the fuel in the filter element 104 upward, and finally the fuel flows out through the oil outlet pipe 202.

[0032] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A rear cover of an automobile electric fuel pump, comprising a fuel pump body (1), a rear cover (2) and a fastening structure (3), characterized in that: The rear cover (2) is welded to the top outer wall of the fuel pump body (1); the two fastening structures (3) are threadedly connected to the top outer wall of the rear cover (2); the two fastening structures (3) include an anti-slip stopper (304); an upper pipe opening (306) is welded to the upper surface of the anti-slip stopper (304); a plurality of limiting grooves (307) are welded to the outer wall of the upper pipe opening (306); a plurality of limiting grooves (307) are opened on the outer walls around the top of the upper pipe opening (306); and clamping rings (308) are slidably connected to the inner walls of the plurality of limiting grooves (307).

2. The rear cover of the automobile electric fuel pump according to claim 1, characterized in that: A lower pipe opening (305) is welded to the lower surface of the anti-slip stopper (304), a thread (302) is provided on the outer wall of the lower pipe opening (305), and a nut (301) is sleeved on the outer side of the end away from the upper pipe opening (306) and the lower pipe opening (305).

3. The rear cover of the automobile electric fuel pump according to claim 2, characterized in that: The inner walls of the two nuts (301) are provided with threads (302), and the two nuts (301) are threadedly connected to the outer walls of the lower pipe opening (305) and the thread strip (309) through the threads (302). A rubber ring (303) is welded to one end of the two nuts (301) close to the lower pipe opening (305) and the upper pipe opening (306).

4. The rear cover of the automobile electric fuel pump according to claim 1, characterized in that: The fuel pump body (1) comprises a shell (101), an oil inlet pipe (102) is provided on the bottom inner wall of the shell (101), a filter element (104) is provided inside the shell (101) close to the oil inlet pipe (102), a plurality of filter screen plates (103) are sleeved on the bottom outer wall of the filter element (104), and magnets (105) are provided on the surrounding inner walls of the shell (101) close to the filter element (104).

5. The rear cover of the automobile electric fuel pump according to claim 4, characterized in that: A cover body (201) is welded on the top outer wall of the housing (101), an oil outlet pipe (202) is provided on the inner wall of the cover body (201), and two positive and negative electrode interfaces (203) are welded on the inner wall of the cover body (201).

6. The rear cover of the automobile electric fuel pump according to claim 5, characterized in that: The positive and negative electrode interfaces (203) are sleeved on the top outer wall of the lower pipe opening (305), and the nut (301) at the lower pipe opening (305) is sleeved on the outer wall of the positive and negative electrode interfaces (203).

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