Electric fuel injection pump

Abstract

The utility model relates to the technical field of oil pumps, in particular to an electric fuel injection pump. The oil pump comprises an oil pump body, an oil pump seat and an oil tank cover. An oil inlet is formed in the top of the oil pump seat, the oil tank cover is detachably connected into the oil inlet of the oil pump seat, at least one oil inlet hole is formed in the side face of the lower section of the oil pump seat and communicated with the oil inlet, and the oil pump body is arranged at the bottom of the oil pump seat. When the electric oil injection pump adopting the scheme is used, oil is filled into the oil inlet, and oil enters the inner side of the oil tank through the oil inlet hole; when the oil pump body pumps oil outwards, oil in the oil tank is pumped out and pumped outwards. The oil pump seat can be connected with the oil tank cover and the oil pump body, and the oil pump body is integrated on the oil pump seat, so that an oil pump mounting port with a larger size can be prevented from being independently arranged on the oil tank for mounting the electric fuel injection pump. The risk of oil leakage of the oil tank is reduced, and the installation difficulty of the oil pump is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumps, in particular to an electric fuel injection pump. Background Art

[0002] The electric fuel injection pump on the market is usually arranged inside the fuel tank, and the oil in the fuel tank is pumped to the throttle valve by the electric fuel injection pump. In order to be installed inside the fuel tank, the existing electric fuel injection pump is usually provided with a special fuel pump installation port on the fuel tank, and the electric fuel injection pump is fixed in the fuel pump installation port.

[0003] However, there are some problems in the installation of the existing electric fuel injection pump. Since the fuel tank needs to be provided with an independent installation port for the fuel pump, on the one hand, due to the large size of the electric fuel injection pump, the required fuel pump installation port size is also correspondingly large, which increases the difficulty of sealing between the fuel tank and the fuel pump and increases the risk of oil leakage; on the other hand, in order to prevent oil leakage, a separate sealing structure needs to be provided between the fuel tank and the fuel pump to seal the connection between the fuel tank and the fuel pump, which increases the difficulty of installing the fuel pump. Utility Model Content

[0004] In view of the above-mentioned defects, the technical problem solved by the utility model is to provide an electric fuel injection pump, which can avoid providing a large-sized fuel pump mounting port on the fuel tank to install the fuel pump, thereby reducing the risk of fuel tank leakage.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] An electric fuel injection pump comprises an oil pump body, an oil pump seat and a fuel tank cover, wherein an oil inlet is provided on the top of the oil pump seat, and the fuel tank cover is detachably connected to the oil inlet of the oil pump seat, and at least one oil inlet hole is provided on the side of the lower section of the oil pump seat, and the oil inlet hole is connected to the oil inlet, and the oil pump body is arranged at the bottom of the oil pump seat.

[0007] By adopting the electric fuel injection pump of the above scheme, when refueling, oil is added into the oil inlet, and the oil enters the inner side of the fuel tank through the oil inlet hole; when the oil pump body pumps oil outward, the oil pump body extracts the oil in the fuel tank and pumps it out. Since the oil pump seat is connected to both the fuel tank cover and the oil pump body, the oil pump body is integrated into the oil pump seat, which can avoid setting a separate oil pump installation port with a larger diameter on the fuel tank. On the one hand, the risk of oil tank leakage is reduced, and on the other hand, the sealing structure at the connection between the oil pump and the existing fuel tank is reduced, which reduces the difficulty of installing the oil pump.

[0008] The utility model is further configured to further include a connecting piece, wherein the connecting piece is detachably connected to the oil pump seat, and the oil pump body is fixedly connected to the connecting piece. Since the connecting piece for installing the oil pump body is separately provided, the oil pump body is easier to assemble.

[0009] The utility model is further configured that the oil pump seat comprises a pump seat body and a connecting sleeve connected to each other, the oil inlet is opened on the upper side of the pump seat body, and the oil inlet hole is opened on the side of the connecting sleeve. Since the connecting sleeve is annular, it is convenient to install other components inside.

[0010] The utility model is further configured that at least two first connecting plates are connected to the lower end of the connecting sleeve, and the first connecting plates are detachably connected to the connecting member. The detachable connection between the first connecting plates and the connecting member facilitates the installation and removal of the connecting member and the oil pump seat.

[0011] The utility model is further configured such that the connecting member is cylindrical, the oil pump body is arranged inside the connecting member, the connecting member is located inside the first connecting plate, a plurality of first clamping holes are provided on the first connecting plate, and the outer side of the upper section of the connecting member has a plurality of first convex parts corresponding to the first clamping holes one by one, and when the connecting member and the first connecting plate are close to each other in the axial direction, the first convex parts can be clamped into the corresponding first clamping holes. The first convex parts cooperate with the first clamping holes to facilitate the installation and removal of the connecting member and the first connecting plate.

[0012] The utility model is further configured that a plurality of limiting hoops corresponding to the first connecting plates are provided on the outer side of the connecting member, and the first connecting plate is inserted into the corresponding limiting hoops. The limiting hoops constrain the free end of the first connecting plate, thereby improving the stability of the connection between the first connecting plate and the connecting member.

[0013] The utility model is further configured that the outer side of the pump seat body is provided with a wing plate along the circumferential direction, and the wing plate is provided with a plurality of mounting holes. The wing plate can be used to conveniently mount the oil pump seat as a whole on the oil tank, wherein the mounting holes are used to mount bolts, and the oil pump seat as a whole can be bolted to the oil tank through the bolts.

[0014] The utility model is further configured that the connecting piece is detachably connected to an oil outlet filter, and the oil outlet filter is used to filter the oil pumped into the oil pump body. The oil pumped into the oil tank by the oil pump body can be filtered through the oil outlet filter to prevent pollutants in the oil in the oil tank from being supplied to the outside through the oil pump.

[0015] The utility model is further configured such that the outer side of the lower section of the connecting piece has a plurality of second protrusions, the oil outlet filter is provided with a plurality of second connecting plates corresponding to the second protrusions one by one, the second connecting plate is provided with second clamping holes corresponding to the second protrusions, and the second protrusions are clamped in the corresponding second clamping holes. The second clamping holes on the second connecting plate cooperate with the corresponding second protrusions, thereby facilitating the disassembly and connection between the oil outlet filter and the connecting piece.

[0016] The utility model is further configured to include an oil outlet seat, on which an oil outlet nozzle and a wiring port are provided, and the oil outlet of the oil pump body is connected to the oil outlet nozzle. Since the oil outlet nozzle and the wiring port of the oil pump body are integrated on the oil outlet seat, the number of openings on the oil tank is reduced, and the overall sealing of the oil tank is improved.

[0017] In summary, the electric fuel injection pump provided by the utility model has at least the following beneficial effects:

[0018] 1. The oil pump seat integrates the oil tank cover and the oil pump body together. There is no need to set a large oil pump mounting hole on the oil tank, which reduces the risk of oil tank leakage and the manufacturing cost of the oil tank.

[0019] 2. The oil pump is easier to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any novel labor.

[0021] Figure 1 is a schematic diagram of a three-dimensional structure in which the embodiment and the fuel tank cap are assembled together;

[0022] Figure 2 is a schematic diagram of an exploded view of an embodiment;

[0023] Figure 3 is a schematic diagram of the three-dimensional structure of the oil pump seat in the embodiment at a first viewing angle;

[0024] Figure 4 3D is a schematic diagram of the three-dimensional structure of the oil pump base in the embodiment at a second viewing angle.

[0025] Figure numerals: 1. oil pump body, 2. oil pump seat, 201. pump seat body, 202. connecting sleeve, 203. first connecting plate, 204. first clamping hole, 205. wing plate, 206. mounting hole, 207. oil inlet, 208. oil inlet hole, 3. connecting piece, 4. first protrusion, 5. second protrusion, 6. limiting hoop, 7. oil inlet filter, 8. oil outlet filter, 9. second connecting plate, 10. second clamping hole, 11. oil outlet seat, 12. oil outlet nozzle, 13. wiring port, 14. fuel tank cap, 15. oil level indicator, 16. oil outlet pipe, 17. control wiring harness, 18. sealing ring. DETAILED DESCRIPTION

[0026] In order to make those skilled in the art better understand the technical solution of the utility model, the following Figure 1-4 The utility model is further described in detail with specific implementation methods.

[0027] See also Figure 1-4The present embodiment provides an electric fuel injection pump, comprising a fuel pump body 1, a fuel pump seat 2, a connecting piece 3 and a fuel tank cover 14. The fuel pump seat 2 is located on the upper side of the fuel pump body 1, and an oil inlet 207 is provided on the top of the fuel pump seat 2. The fuel tank cover 14 is detachably connected to the fuel inlet 207 of the fuel pump seat 2. Specifically, a thread is provided in the fuel inlet 207, which is threadedly connected to the fuel tank cover 14 with an external thread. The fuel pump body 1 is arranged at the bottom of the fuel pump seat 2, and at least one fuel inlet hole 208 is provided on the side of the lower section of the fuel pump seat 2, and the fuel inlet hole 208 is connected to the fuel inlet 207. In the present embodiment, two fuel inlet holes 208 are preferably provided. The connecting piece 3 is detachably connected to the fuel pump seat 2, and the fuel pump body 1 is fixedly connected to the connecting piece 3. The fuel pump seat 2 comprises a pump seat body 201 and a connecting sleeve 202 connected to each other. The outer side of the pump seat body 201 is provided with a wing plate 205 along the circumferential direction, and a plurality of mounting holes 206 are provided on the wing plate 205. The connecting sleeve 202, the pump seat body 201 and the wing plate 205 are integrally formed. The oil inlet 207 is provided on the upper side of the pump seat body 201, and the oil inlet 207 passes through the upper and lower ends of the pump seat body 201. The oil inlet hole 208 is provided on the side of the connecting sleeve 202, and the oil inlet hole 208 is used to connect to the inside of the oil tank. In this embodiment, the oil inlet holes 208 are preferably provided on both the front and rear sides of the connecting sleeve 202. An oil inlet filter 7 is provided on the inner side of the connecting sleeve 202, and the oil inlet filter 7 is a prior art, and the oil inlet filter 7 is arranged in the passage between the oil inlet 207 and the oil inlet hole 208. At least two first connecting plates 203 are connected to the lower end of the connecting sleeve 202, and the first connecting plates 203 are detachably connected to the connecting member 3. In this embodiment, two first connecting plates 203 are preferably provided, and the two first connecting plates 203 are distributed in the left-right direction. In this embodiment, the connecting member 3 is preferably cylindrical, and the oil pump body 1 is arranged inside the connecting member 3, and the connecting member 3 is located inside the first connecting plate 203, and the inner surface of the first connecting plate 203 is in contact with the outer surface of the connecting member 3. A plurality of first clamping holes 204 are provided on the first connecting plate 203, and a plurality of first convex portions 4 corresponding to the first clamping holes 204 are provided on the outer side of the upper section of the connecting member 3, and when the connecting member 3 and the first connecting plate 203 are close to each other in the axial direction, the first convex portions 4 can be clamped into the corresponding first clamping holes 204. Specifically, the upper side surface of the first protrusion 4 is an inclined surface. When the connector 3 is inserted upward between the two first connecting plates 203, the inclined surface of the upper side surface of the first protrusion 4 contacts and guides the lower end of the first connecting plate 203, forcing the lower end of the first connecting plate 203 to produce elastic deformation outward, so that the first protrusion 4 moves to the corresponding position of the corresponding first clamping hole 204, and then the first protrusion 4 is clamped into the corresponding first clamping hole 204. The oil outlet of the oil pump body 1 is connected to the oil outlet pipe 16, and the oil pump body 1 is also provided with a control harness 17.Since the oil pump body 1 needs to pump the oil in the oil tank to the outside of the oil tank, in order to facilitate the installation of the oil outlet pipe 16 on the oil tank, it further includes an oil outlet seat 11, and the oil outlet seat 11 is provided with an oil outlet nozzle 12 and a wiring port 13. The oil outlet of the oil pump body 1 is connected to the oil outlet nozzle 12 through the oil outlet pipe 16. The control harness 17 for controlling the connection of the oil pump body 1 is connected to the wiring port 13, and the external control system is conveniently connected to the control harness 17 through the wiring port 13, so as to facilitate the control of the oil pump body 1.

[0028] By adopting the above scheme, during use: add oil into the oil inlet 207, and the oil enters the oil tank through the oil inlet hole 208; when the oil pump pumps oil outward, the oil pump body 1 extracts the oil in the oil tank and pumps it outward through the oil outlet pipe 16. Since the oil pump seat 2 is connected to both the oil tank cover 14 and the oil pump body 1, the oil pump body 1 is integrated into the oil pump seat 2, which can avoid setting a separate oil pump installation port on the oil tank. On the one hand, the risk of oil leakage in the oil tank is reduced, and on the other hand, the manufacturing cost of the oil tank is reduced. Since the oil pump needs to pump oil outward, a mounting port for installing the oil outlet seat 11 needs to be opened on the oil tank. Although the oil tank has an additional mounting port for the oil outlet seat 11, the size of the oil outlet seat 11 itself is smaller than that of the oil pump body 1, which makes the sealing performance of the connection between the oil outlet seat 11 and the mounting port of the oil tank better. Furthermore, the vibrations to which the oil outlet seat 11 itself is subjected in the working environment are smaller than those to which the oil pump body 1 is subjected, which makes it difficult for leakage to occur between the oil outlet seat 11 and the corresponding mounting port, thereby improving the sealing performance of the oil tank as a whole. In order to enhance the sealing performance between the oil pump seat 2 and the oil tank, when the oil pump seat 2 is installed, a sealing ring 18 may be provided below the wing plate 205, and the wing plate 205 and the oil tank together clamp the sealing ring 18, thereby enhancing the sealing performance between the oil pump seat 2 and the oil tank.

[0029] Please continue reading Figure 1-2 In order to enhance the stability of the connection between the connecting member 3 and the first connecting plate 203, further, two limiting hoops 6 corresponding to the first connecting plates 203 are provided on the outer side of the connecting member 3, and the first connecting plate 203 is vertically inserted into the corresponding limiting hoops 6.

[0030] Please continue reading Figure 1-2 In order to further filter out pollutants in the oil and ensure the cleanliness of the oil supplied by the oil pump, the connector 3 is detachably connected to an oil outlet filter 8, which is used to filter the oil drawn into the oil pump body 1. The oil outlet filter 8 is a prior art.

[0031] Please continue reading Figure 1-2In order to facilitate the disassembly connection between the oil outlet filter 8 and the oil pump seat 2, in some embodiments, the outer side of the lower section of the connecting member 3 has a plurality of second protrusions 5, and in this embodiment, three second protrusions 5 are preferably provided. The oil outlet filter 8 is provided with three second connecting plates 9 corresponding to the second protrusions 5 one by one, and the second connecting plates 9 are provided with second clamping holes 10 corresponding to the second protrusions 5, and the second protrusions 5 are clamped in the corresponding second clamping holes 10.

[0032] Please continue reading Figure 1-2 In order to identify the amount of oil in the oil tank, further, an oil level indicator 15 is provided outside the connecting member 3. The oil level indicator 15 is a prior art and is used to identify the amount of oil in the oil tank.

[0033] It should be noted that the words indicating direction in this article, such as up and down, are all based on Figure 1 The setting of the direction is only for the convenience of description and has no other specific meaning.

[0034] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0035] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An electric fuel injection pump, comprising a fuel pump body (1), characterized in that: It also includes an oil pump seat (2) and an oil tank cover (14); the top of the oil pump seat (2) is provided with an oil inlet (207); the oil tank cover (14) is detachably connected to the oil inlet (207) of the oil pump seat (2); the side surface of the lower section of the oil pump seat (2) is provided with at least one oil inlet hole (208); the oil inlet hole (208) is connected to the oil inlet (207); and the oil pump body (1) is arranged at the bottom of the oil pump seat (2).

2. An electric fuel injection pump as claimed in claim 1, characterized in that: It also comprises a connecting piece (3), wherein the connecting piece (3) is detachably connected to the oil pump seat (2), and the oil pump body (1) is fixedly connected to the connecting piece (3).

3. An electric fuel injection pump as claimed in claim 2, characterized in that: The oil pump seat (2) comprises a pump seat body (201) and a connecting sleeve (202) connected to each other, the oil inlet (207) is arranged on the upper side of the pump seat body (201), and the oil inlet hole (208) is arranged on the side of the connecting sleeve (202).

4. An electric fuel injection pump as claimed in claim 3, characterized in that: At least two first connecting plates (203) are connected to the lower end of the connecting sleeve (202), and the first connecting plates (203) are detachably connected to the connecting member (3).

5. An electric fuel injection pump as claimed in claim 4, characterized in that: The connecting member (3) is cylindrical, the oil pump body (1) is arranged on the inner side of the connecting member (3), the connecting member (3) is located on the inner side of the first connecting plate (203), a plurality of first clamping holes (204) are opened on the first connecting plate (203), and the outer side of the upper section of the connecting member (3) has a plurality of first protrusions (4) corresponding to the first clamping holes (204) one by one. When the connecting member (3) and the first connecting plate (203) are axially close to each other, the first protrusions (4) can be clamped into the corresponding first clamping holes (204).

6. An electric fuel injection pump as claimed in claim 5, characterized in that: A plurality of limiting hoops (6) corresponding one to one with the first connecting plates (203) are arranged on the outer side of the connecting member (3), and the first connecting plates (203) are inserted into the corresponding limiting hoops (6).

7. An electric fuel injection pump as claimed in any one of claims 3 to 6, characterized in that: A wing plate (205) is provided on the outer side of the pump seat body (201) along the circumferential direction, and a plurality of mounting holes (206) are provided on the wing plate (205).

8. An electric fuel injection pump as claimed in claim 2, characterized in that: The connecting piece (3) is detachably connected to an oil outlet filter (8), and the oil outlet filter (8) is used to filter the oil pumped into the oil pump body (1).

9. An electric fuel injection pump as claimed in claim 8, characterized in that: The outer side of the lower section of the connecting member (3) is provided with a plurality of second protrusions (5); the oil outlet filter (8) is provided with a plurality of second connecting plates (9) corresponding to the second protrusions (5) one by one; the second connecting plates (9) are provided with second clamping holes (10) corresponding to the second protrusions (5); the second protrusions (5) are clamped in the corresponding second clamping holes (10).

10. An electric fuel injection pump as claimed in claim 1, characterized in that: It also comprises an oil outlet seat (11), on which an oil outlet nozzle (12) and a connection port (13) are provided, and the oil outlet of the oil pump body (1) is in communication with the oil outlet nozzle (12).

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