CN212359985U - Low-pressure fuel pump - Google Patents
Low-pressure fuel pump Download PDFInfo
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- CN212359985U CN212359985U CN202020257864.2U CN202020257864U CN212359985U CN 212359985 U CN212359985 U CN 212359985U CN 202020257864 U CN202020257864 U CN 202020257864U CN 212359985 U CN212359985 U CN 212359985U
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- fuel pump
- pressure fuel
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- cavity
- low pressure
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Abstract
The utility model discloses a low pressure fuel pump, including low pressure fuel pump upper cover and low pressure fuel pump body, the low pressure fuel pump body is including sealed the pad, pump body subassembly, peritoneum subassembly and low pressure fuel pump base, the low pressure fuel pump upper cover, sealed the pad, pump body subassembly, offer respectively on the peritoneum subassembly be used for with fastener assorted through-hole, be provided with nested on the low pressure fuel pump base, nested shape is the annular groove, the fastener is worn to locate low pressure fuel pump upper cover in proper order, sealed the pad, pump body subassembly, the recess face contact realization fastener and low pressure fuel pump upper cover with nested in the hole of peritoneum subassembly, sealed the pad, the fastening connection of pump body subassembly and peritoneum subassembly. According to the technical scheme, the existing mounting nut is removed, the thread fastening is realized in an internal thread nesting mode, the mounting efficiency of the fuel pump is improved, the firmness of bolt mounting is improved, the service life of the fuel pump is prolonged, and the quality and the service life of products are improved.
Description
Technical Field
The utility model relates to a low pressure fuel pump can be used to marine outboard engine technical field of handle.
Background
The fuel pump is one of basic components of an electronic fuel injection automobile fuel injection system in the automobile accessory industry, is positioned in an oil tank of an automobile, works during starting and running of an engine, and shuts off power supply of the fuel pump by the HFM-SFI control module if the engine stops and an ignition switch is still in ON state so as to avoid accidental ignition. The fuel pump is used for sucking fuel from the fuel tank, pressurizing the fuel and then delivering the fuel to the fuel supply pipe, and the fuel pump is matched with the fuel pressure regulator to establish certain fuel pressure.
The existing low-pressure fuel pump adopts a mounting mode of matching a bolt and a nut, the mounting mode takes mounting time very much, and meanwhile, the situation that the nut is not mounted in place also exists, so that the phenomenon of failure of the fuel pump in a period of operation can be caused. Therefore, it is a problem to be solved urgently to research a low-pressure fuel pump which has a simple structure and can improve the installation firmness of a fastener.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problems existing in the prior art and providing a low-pressure fuel pump.
The purpose of the utility model can be realized through the following technical scheme: the utility model provides a low pressure fuel pump, includes low pressure fuel pump upper cover and low pressure fuel pump body, the low pressure fuel pump body includes seal assembly, pump body subassembly, peritoneum subassembly and low pressure fuel pump base, offer respectively on low pressure fuel pump upper cover, seal assembly, pump body subassembly, the peritoneum subassembly be used for with fastener assorted through-hole, be provided with nested piece on the low pressure fuel pump base, the shape of nested piece is the annular groove, the fastener wears to locate in proper order in the hole of low pressure fuel pump upper cover, seal assembly, pump body subassembly, peritoneum subassembly until with the threaded fit in the nested piece realize the fastening connection of fastener and low pressure fuel pump upper cover, seal assembly, pump body subassembly and peritoneum subassembly.
Preferably, the fastener is a fixing bolt, the fixing bolt is a metal piece, the hole is a unthreaded hole, and the size of the fixing bolt is matched with the size of the unthreaded hole.
Preferably, the low pressure fuel pump upper cover can set up on the low pressure fuel pump body with dismantling, fastener, seal assembly, peritoneum subassembly, nest symmetry set up in the both sides of low pressure fuel pump body.
Preferably, the low-pressure fuel pump comprises a fuel inlet cavity and a fuel outlet cavity, and the sealing assembly is arranged on the pump body assembly and used for sealing the upper end face of the cavity of the low-pressure fuel pump and separating the fuel inlet cavity and the fuel outlet cavity of the low-pressure fuel pump body.
Preferably, the fuel inlet chamber sets up in the left side chamber of low pressure fuel pump body top, and the right side chamber is the fuel oil cavity of producing the oil pump body subassembly is used for carrying out the action of inhaling oil and producing oil with the fuel oil to low pressure fuel pump fuel inlet chamber, pump body subassembly includes first cavity and the second cavity that sets up from top to bottom, first cavity is used for the change of cavity volume, be provided with in the second cavity and be used for opening and closed valve, through the volume change in the first cavity, form the negative pressure, realize the fuel function of pump sending in the second cavity.
Preferably, the first cavity is an oil inlet and outlet cavity, and the second cavity is a volume change cavity.
Preferably, the peritoneum component is connected with and driven by a driving mechanism, and the peritoneum component moves up and down under the driving of the driving mechanism to cause the volume of the second cavity of the pump body component to change.
Preferably, low pressure fuel pump base sets up with nested one piece integrated into one piece, nested sets up in the below of low pressure fuel pump base, nested is the internal thread nested, the internal thread nested is the metalwork.
Preferably, the size of nest spare is the hole, the hole is the internal thread hole, and the outside is for having the spill cylinder spare of annular knurl, and the internal thread hole and the fastener cooperation of nest spare realize the screw fastening, concave mechanism in the middle of the nest spare and outside annular knurl have realized and have combined with the fastening of low pressure fuel pump base an organic whole.
The utility model discloses technical scheme's advantage mainly embodies: the device has the advantages of simple structure, convenient and reliable use, low cost and strong adjustability. According to the technical scheme, the existing mounting nut is removed, the thread fastening is realized in an internal thread nesting mode, the mounting efficiency of the fuel pump is improved, the firmness of bolt mounting is improved, the service life of the fuel pump is prolonged, the quality and the service life of products are improved, the user satisfaction is improved, and the fuel pump is suitable for being popularized and used in the industry.
Drawings
Fig. 1 is an assembly view of a low pressure fuel pump according to the present invention.
Fig. 2 is a cross-sectional view of a low pressure fuel pump of the present invention.
Detailed Description
Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. These embodiments are merely exemplary embodiments for applying the technical solutions of the present invention, and all technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the scope of the present invention.
The utility model discloses a low pressure fuel pump, as shown in figure 1 and figure 2, this low pressure fuel pump includes low pressure fuel pump upper cover 2 and low pressure fuel pump body, low pressure fuel pump upper cover 2 can detachably set up on the low pressure fuel pump body. The low pressure fuel pump body includes seal assembly 3, pump body subassembly 4, peritoneum subassembly 5 and low pressure fuel pump base 6. And through holes used for being matched with the fastening piece 1 are respectively formed in the low-pressure fuel pump upper cover 2, the sealing component 3, the pump body component 4 and the peritoneum component 5. In this technical scheme, fastener 1 is preferably fixing bolt, fixing bolt is the metalwork, and in this technical scheme, the metalwork is preferably aluminium part, the hole is the unthreaded hole, fixing bolt's size and the size phase-match in unthreaded hole.
The low-pressure fuel pump base 6 is provided with the nesting piece 7, the nesting piece 7 is in the shape of an annular groove, the connection strength of the nesting piece 7 and the pump base 6 can be increased due to the arrangement of the annular groove, and the low-pressure fuel pump base 6 and the nesting piece 7 are integrally formed and can increase the joint force of the low-pressure fuel pump base 6 and the nesting piece 7. The nesting piece 7 is arranged below the low-pressure fuel pump base 6, the nesting piece 7 is an internal thread nesting piece, and the internal thread nesting piece is a metal piece.
The size of nested 7 is the hole, the hole is the internal thread hole, and the hole outside is for having the spill cylinder spare of annular knurl, and the internal thread hole of nested cooperatees with fastener 1, realizes the screw-thread fastening, and the spill mechanism in the middle of it and outside annular knurl have realized combining with low pressure fuel pump base 6's fastening is integrative to bonding strength has been increased.
The fastener 1 sequentially penetrates through holes of the low-pressure fuel pump upper cover 2, the sealing assembly 3, the pump body assembly 4 and the peritoneum assembly 5 until the fastener is matched with threads in the nesting piece 7 to realize the fastening connection of the fastener with the low-pressure fuel pump upper cover 2, the sealing assembly 3, the pump body assembly 4 and the peritoneum assembly 5 in the nesting piece 7; the low-pressure fuel pump upper cover 2, the sealing assembly 3, the pump body assembly 4 and the peritoneum assembly 5 are fixed in the nesting piece 7 of the low-pressure fuel pump base 6 through the fastener 1, the nut is removed in the setting, the nesting internal thread is adopted, the nesting piece and the low-pressure fuel pump base are integrated, the mounting reliability is improved, and the mounting firmness of the fastener is improved. The fastener 1, the sealing assembly 3, the peritoneum assembly 5 and the nesting piece 7 are symmetrically arranged on two sides of the low-pressure fuel pump body.
The low-pressure fuel pump comprises a fuel inlet cavity 10 and a fuel outlet cavity 20, wherein the sealing assembly 3 is arranged on the pump body assembly 4 and used for sealing the upper end face of the cavity of the low-pressure fuel pump and separating the fuel inlet cavity 10 and the fuel outlet cavity 20 of the low-pressure fuel pump body. The pump body assembly is used for performing oil absorption and right cavity oil outlet actions on a left cavity above a low-pressure fuel pump body, the fuel oil inlet cavity 10 is arranged in the left cavity above the low-pressure fuel pump body, and the right cavity is a fuel oil outlet cavity 20. The pump body subassembly is used for carrying out the action of inhaling oil and the action of producing oil in right side chamber to low pressure fuel pump body top left side chamber, pump body subassembly includes first cavity and the second cavity that sets up from top to bottom, first cavity is used for the change of cavity volume, be provided with in the second cavity and be used for opening and closed valve, through the volume change in the first cavity, form the negative pressure to realize the fuel function of pump sending in the second cavity. The first cavity is an oil inlet and outlet cavity, and the second cavity is a volume change cavity. The peritoneum component 5 is connected with the driving mechanism and driven by the driving mechanism, and the peritoneum component 5 moves up and down under the driving of the driving mechanism to cause the volume of the second cavity of the pump body component to change.
According to the technical scheme, the mechanism of the low-pressure fuel pump base of the 30-60 horsepower outboard engine is optimized and improved, the existing mounting nut is removed, the thread fastening is realized in an internal thread nesting mode, the mounting efficiency of the fuel pump is improved, the mounting mode of the fuel pump is changed, the mounting efficiency of the low-pressure fuel pump is improved, the firmness of bolt mounting is improved, the service life of the fuel pump is prolonged, and the risk of failure of the fuel pump is reduced.
The utility model has a plurality of implementation modes, and all technical schemes formed by adopting equivalent transformation or equivalent transformation all fall within the protection scope of the utility model.
Claims (9)
1. A low pressure fuel pump, characterized by: comprises a low-pressure fuel pump upper cover (2) and a low-pressure fuel pump body, wherein the low-pressure fuel pump body comprises a sealing component (3), a pump body component (4), a peritoneum component (5) and a low-pressure fuel pump base (6),
through holes matched with the fasteners (1) are respectively arranged on the upper cover (2) of the low-pressure fuel pump, the sealing component (3), the pump body component (4) and the peritoneum component (5),
be provided with nested piece (7) on low pressure fuel pump base (6), the shape of nested piece (7) is the annular groove, fastener (1) wear to locate low pressure fuel pump upper cover (2), seal assembly (3), pump body subassembly (4), peritonaeum subassembly (5) in the hole until with the threaded fit realization fastener in nested piece (7) and the fastening connection of low pressure fuel pump upper cover (2), seal assembly (3), pump body subassembly (4) and peritonaeum subassembly (5) in proper order.
2. A low pressure fuel pump as set forth in claim 1, wherein: the fastener (1) is a fixing bolt, the fixing bolt is a metal piece, the hole is a unthreaded hole, and the size of the fixing bolt is matched with that of the unthreaded hole.
3. A low pressure fuel pump as set forth in claim 1, wherein: the low-pressure fuel pump is characterized in that the upper cover (2) of the low-pressure fuel pump can be detachably arranged on the low-pressure fuel pump body, and the fastener (1), the sealing assembly (3), the peritoneum assembly (5) and the nesting pieces (7) are symmetrically arranged on two sides of the low-pressure fuel pump body.
4. A low pressure fuel pump as set forth in claim 1, wherein: the low-pressure fuel pump comprises a fuel inlet cavity (10) and a fuel outlet cavity (20), wherein the sealing assembly (3) is arranged on the pump body assembly (4) and used for sealing the upper end face of the cavity of the low-pressure fuel pump, and the fuel inlet cavity (10) and the fuel outlet cavity (20) of the low-pressure fuel pump body are separated simultaneously.
5. A low pressure fuel pump as set forth in claim 4, wherein: the fuel oil inlet cavity (10) is arranged in a left cavity above a low-pressure fuel pump body, the pump body assembly comprises a first cavity and a second cavity which are arranged from top to bottom, the first cavity is used for changing the volume of the cavity, a valve used for opening and closing is arranged in the second cavity, negative pressure is formed through the change of the volume in the first cavity, and the function of pumping fuel oil in the second cavity is achieved.
6. A low pressure fuel pump as set forth in claim 5, wherein: the first cavity is an oil inlet and outlet cavity, and the second cavity is a volume change cavity.
7. A low pressure fuel pump as set forth in claim 5, wherein: the peritoneum component (5) is connected with the driving mechanism and driven by the driving mechanism, and the peritoneum component (5) moves up and down under the driving of the driving mechanism to cause the volume of the second cavity of the pump body component to change.
8. A low pressure fuel pump as set forth in claim 1, wherein: the low pressure fuel pump base (6) and nested piece (7) integrated into one piece set up, nested piece (7) set up in the below of low pressure fuel pump base (6), nested piece (7) are the internal thread nested piece, the internal thread nested piece is the metalwork.
9. A low pressure fuel pump as set forth in claim 8, wherein: the size of nested piece (7) is the hole, the hole is the internal thread hole, and the outside is for having the spill cylinder spare of annular knurl, and the internal thread hole and the cooperation of fastener (1) of nested piece (7) realize the screw fastening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020257864.2U CN212359985U (en) | 2020-03-05 | 2020-03-05 | Low-pressure fuel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020257864.2U CN212359985U (en) | 2020-03-05 | 2020-03-05 | Low-pressure fuel pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212359985U true CN212359985U (en) | 2021-01-15 |
Family
ID=74145969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020257864.2U Active CN212359985U (en) | 2020-03-05 | 2020-03-05 | Low-pressure fuel pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212359985U (en) |
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2020
- 2020-03-05 CN CN202020257864.2U patent/CN212359985U/en active Active
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