Electric fuel pump

Abstract

The invention provides an electric fuel pump which is characterized by comprising a machine shell, an electric motor, a fuel pump body, a fuel pump body, a fuel pump body and a fuel pump body, and the machine shell is provided with an end cover at one end and a rear cover at the other end; the impeller is arranged on the rear cover; the pump body is arranged on the impeller; the brush carrier is arranged in the machine shell on one side of the end cover; a magnetic shoe assembly and an armature assembly are arranged in the machine shell, a rotating shaft is arranged in the middle of the armature assembly, the lower end of the rotating shaft is connected with the pump body and the impeller, the upper end of the rotating shaft is connected with the brush frame, the pump body is provided with a large-size first oil passing groove, the rear cover is provided with a large-size oil inlet nozzle, and the brush frame is provided with a large-size second oil passing groove. The end cover is provided with a large-size oil outlet nozzle corresponding to the second oil passing groove of the brush carrier. The impeller with the large thickness is used, the oil inlet volume is increased, and meanwhile the sizes of the oil inlet nozzle, the first oil passing groove, the second oil passing groove and the oil outlet nozzle are increased, so that the larger oil inlet amount and the larger oil outlet amount are met, the oil outlet efficiency is improved, and then the performance is improved.

Description

Technical Field

[0001] The invention relates to an electric fuel pump. Background Art

[0002] With the popularization of automobile culture and the increase in personalized demand, consumers are increasingly interested in high-performance cars and personalized customized vehicles. The overseas modified car market is growing rapidly and the demand for personalized vehicles is constantly increasing. This has led to a demand for customized oil pumps with smaller size and higher output performance. Summary of the Invention

[0003] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose an electric fuel pump, which increases the oil intake volume by using an impeller with a thicker thickness, and at the same time increases the size of the oil inlet nozzle, the first oil trough, the second oil trough and the oil outlet nozzle to meet larger oil intake and oil output, improve oil output efficiency, and thus enhance performance.

[0004] The object of the present invention can be achieved by the following technical solutions: An electric fuel pump, characterized in that it comprises:

[0005] A housing, one end of which is provided with an end cover, and the other end of which is provided with a rear cover;

[0006] an impeller, which is arranged on the rear cover;

[0007] a pump body, which is arranged on the impeller;

[0008] A brush holder is provided in the housing on one side of the end cover;

[0009] The casing contains a magnetic tile assembly and an armature assembly, the middle part of the armature assembly is a rotating shaft, the lower end of the rotating shaft is connected to the pump body and the impeller, and the upper end of the rotating shaft is connected to the brush holder. The pump body has a large-sized first oil groove, the rear cover has a large-sized oil inlet nozzle, the brush holder has a large-sized second oil groove, and the end cover has a large-sized oil outlet nozzle corresponding to the second oil groove of the brush holder.

[0010] Furthermore, an arc-shaped oil unloading groove is provided on the inner side of the oil inlet nozzle of the rear cover, and a one-way valve is provided at the oil outlet nozzle.

[0011] Furthermore, the magnetic tile assembly includes two symmetrically arranged magnetic tiles and a retaining spring arranged between the magnetic tiles.

[0012] Furthermore, the impeller is disc-shaped and has a plurality of inclined blades on its edge.

[0013] Furthermore, the blades are arranged obliquely and are in an arc shape.

[0014] Furthermore, the brush holder is provided with an oil guide plate, and the oil guide plate is arranged between the two magnetic tiles.

[0015] Furthermore, an annular oil storage cavity is provided in the brush holder, and the oil storage cavity is communicated with the second oil passage groove.

[0016] Furthermore, the end cover is provided with a wire socket, and the brush holder is provided with a plug connected to the wire socket.

[0017] Furthermore, there is a certain distance between the impeller and the rear cover, and a filter core is provided at the distance.

[0018] Furthermore, the filter core is cylindrical and its outer wall is in contact with the inner wall of the casing.

[0019] Compared with the existing technology, the advantages of this application are: it increases the oil inlet volume by using an impeller with a thicker thickness, and at the same time increases the size of the oil inlet nozzle, the first oil trough, the second oil trough and the oil outlet nozzle to meet larger oil inlet and oil outlet volumes, improve oil outlet efficiency, and thus improve performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of an electric fuel pump;

[0021] Figure 2 This is a schematic diagram of the internal structure of the electric fuel pump;

[0022] Figure 3 This is a schematic diagram of the back cover;

[0023] Figure 4 It is a schematic diagram of the brush holder;

[0024] Figure 5 It is a schematic diagram of the pump body;

[0025] Figure 6 is a schematic cross-sectional view of an electric fuel pump;

[0026] Figure 7 is a schematic cross-sectional view of the end cover;

[0027] Figure 8 is a schematic diagram of the impeller;

[0028] Figure 9 is a schematic cross-sectional view of the blades of the impeller of Example 2;

[0029] In the figure, 1. End cover; 11. Oil outlet nozzle; 12. One-way valve; 13. Wire socket; 2. Casing; 3. Rear cover; 31. Oil inlet nozzle; 32. Oil unloading trough; 4. Brush holder; 41. Insert; 42. Guide plate; 43. Second oil trough; 44. Oil storage chamber; 5. Magnetic tile; 51. Retaining spring; 6. Armature assembly; 61. Rotating shaft; 7. Pump body; 71. First oil trough; 8. Impeller; 81. Blades; 9. Filter element. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention.

[0031] like Figure 1-8 As shown, an electric fuel pump is characterized in that it includes:

[0032] A housing 2, one end of which is mounted with an end cover 1, and the other end of the housing 2 is mounted with a back cover 3;

[0033] an impeller 8, which is arranged on the rear cover 3;

[0034] a pump body 7, which is arranged on the impeller 8;

[0035] A brush holder 4 is provided in the housing 2 on one side of the end cover 1;

[0036] The casing 2 contains a magnetic tile assembly and an armature assembly 6. The middle part of the armature assembly 6 is a rotating shaft 61. The lower end of the rotating shaft 61 is connected to the pump body 7 and the impeller 8. The upper end of the rotating shaft 61 is connected to the brush holder 4. The pump body 7 has a large-sized first oil groove 71, the rear cover 3 has a large-sized oil inlet nozzle 31, the brush holder 4 has a large-sized second oil groove 43, and the end cover 1 has a large-sized oil outlet nozzle 11 corresponding to the second oil groove 43 of the brush holder 4.

[0037] Specifically, the end cover 1 and the rear cover 3 are supported by the casing 2. The end cover 1 is connected to an external power supply to rotate the armature assembly 6, driving the impeller 8 to rotate. The oil inlet nozzle 31 of the rear cover 3 delivers the fuel into the interior. The high-speed rotation of the impeller 8 creates a vacuum and low pressure at the oil inlet, and the fuel is pumped upward through the pump body 7 and pressed out through the first oil groove 71, providing the fuel system with fuel with a certain pressure. The fuel goes upward to the second oil groove 43 of the brush holder 4 and is then delivered through the oil outlet nozzle 11 of the end cover 1.

[0038] By using a thicker impeller 8, the oil inlet volume is increased, and at the same time the sizes of the oil inlet nozzle 31, the first oil trough 71, the second oil trough 43 and the oil outlet nozzle 11 are increased to meet the requirements of larger oil inlet and oil outlet, improve the oil outlet efficiency, and thus enhance the performance.

[0039] Furthermore, an arc-shaped oil discharge groove 32 is provided inside the fuel inlet nozzle 31 of the rear cover 3, and a one-way valve 12 is provided at the fuel outlet nozzle 11. The oil discharge groove 32 is used to receive the fuel sucked in by the fuel inlet nozzle 31, quickly filling the bottom with fuel, and at the same time alleviating the impact of the fuel entering instantly. The one-way valve 12 at the fuel outlet nozzle 11 is used to prevent fuel backflow.

[0040] Furthermore, the magnetic tile assembly includes two symmetrically arranged magnetic tiles 5 and a clamping spring 51 arranged between the magnetic tiles 5. The clamping spring 51 reduces the shaking phenomenon during fuel operation and improves the fixing effect.

[0041] Furthermore, the impeller 8 is disc-shaped and has a plurality of inclined blades 81 on its edge.

[0042] Specifically, the thickness of the impeller 8 is increased, so that the space between the blades 81 of the impeller 8 becomes larger, and the overall oil intake volume is increased, thereby achieving higher performance.

[0043] Furthermore, an oil guide plate is provided on the brush holder 4 , and the oil guide plate is arranged between the two magnetic tiles 5 .

[0044] Furthermore, an annular oil storage chamber 44 is provided in the brush holder 4 , and the oil storage chamber 44 is communicated with the second oil passage groove 43 .

[0045] Specifically, the fuel is guided into the oil storage cavity 44 of the brush holder 4 through the guide plate 42 and then sent out through the second oil passage groove 43 . The large size of the second oil passage groove 43 improves the oil output efficiency.

[0046] Furthermore, a wire socket 13 is provided on the end cover 1 , and an insert 41 connected to the wire socket 13 is provided on the brush holder 4 .

[0047] Furthermore, there is a certain distance between the impeller 8 and the rear cover 3, and a filter element 9 is provided at the distance.

[0048] Furthermore, the filter core 9 is cylindrical and its outer wall is in contact with the inner wall of the casing 2 .

[0049] The filter element 9 is used to reduce impurities in the fuel.

[0050] Example 2

[0051] like Figure 9 As shown, further, the blades 81 are arranged at an angle and are in an arc shape.

[0052] Specifically, the arc-shaped blades 81 generate a stronger vacuum and low-pressure state when rotating, thereby accelerating the passage of fuel and improving performance by increasing the fuel flow rate at the same flow rate.

[0053] The technical solution of the present invention provides a solution that is significantly different from the prior art to address the technical problem that the prior art solution is too single. The parts not involved in the technical solution of this application are the same as the prior art or can be implemented using the prior art and will not be described in detail.

[0054] The technical solutions in the above embodiments have clearly and completely described the contents of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

Claims

1. An electric fuel pump, characterized in that: It includes: A housing, one end of which is provided with an end cover, and the other end of which is provided with a rear cover; an impeller, which is arranged on the rear cover; a pump body, which is arranged on the impeller; A brush holder is provided in the housing on one side of the end cover; The casing contains a magnetic tile assembly and an armature assembly, the middle part of the armature assembly is a rotating shaft, the lower end of the rotating shaft is connected to the pump body and the impeller, and the upper end of the rotating shaft is connected to the brush holder. The pump body has a large-sized first oil groove, the rear cover has a large-sized oil inlet nozzle, the brush holder has a large-sized second oil groove, and the end cover has a large-sized oil outlet nozzle corresponding to the second oil groove of the brush holder.

2. The electric fuel pump according to claim 1, characterized in that: An arc-shaped oil unloading groove is provided on the inner side of the oil inlet nozzle of the rear cover, and a one-way valve is provided at the oil outlet nozzle.

3. The electric fuel pump according to claim 1, characterized in that: The magnetic tile assembly includes two symmetrically arranged magnetic tiles and a clamping spring arranged between the magnetic tiles.

4. The electric fuel pump according to claim 1, characterized in that: The impeller is disc-shaped and has a plurality of blades arranged obliquely on the edge.

5. The electric fuel pump according to claim 4, characterized in that: The blades are arranged obliquely and are in an arc shape.

6. The electric fuel pump according to claim 3, characterized in that: The brush holder is provided with an oil guide plate, which is arranged between two magnetic tiles.

7. The electric fuel pump according to claim 6, characterized in that: An annular oil storage cavity is provided in the brush holder, and the oil storage cavity is communicated with the second oil passage groove.

8. The electric fuel pump according to claim 7, characterized in that: The end cover is provided with a wire socket, and the brush holder is provided with an insert connected with the wire socket.

9. The electric fuel pump according to claim 1, characterized in that: There is a certain distance between the impeller and the rear cover, and a filter core is provided at the distance.

10. The electric fuel pump according to claim 9, characterized in that: The filter core is cylindrical and its outer wall is in contact with the inner wall of the casing.

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