Automobile electric fuel pump

Abstract

The invention relates to the technical field of fuel pumps, in particular to an automobile electric fuel pump which comprises a shell, a gear pump and an adjusting part, and the adjusting part comprises an inner cylinder, an outer cylinder and a rotating part. An oil suction space is defined between the outer cylinder and the inner cylinder, and oil can enter the oil suction space. The rotating piece comprises a rotating shaft, a supporting plate and a rotating plate. The rotating shaft can rotate around the axis of the rotating shaft, and the rotating plate is installed below the supporting plate through a first elastic piece. According to the automobile electric fuel pump, the adjusting part is arranged in the oil storage chamber, and the gear pump is arranged in the oil discharge chamber. With continuous rotation of the rotating plate, oil in the oil suction space can be sucked into the inner barrel from the position between the inner barrel and the inner top wall of the shell and downwards enters the suction cavity of the gear pump from the inner barrel, the oil storage cavity is used for additionally providing oil for the gear pump, the oil supply amount of the gear pump is increased, and then the oil supply efficiency of the gear pump is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fuel pumps, and in particular to an automobile electric fuel pump. Background Art

[0002] The electric fuel pump is the core part of the fuel pump assembly, which is responsible for providing fuel with a certain pressure to the vehicle fuel system. The current automotive electric fuel pump relies on a permanent magnet motor to drive the pump body to rotate at high speed to suck the fuel from the fuel tank, flow through the inside of the electric fuel pump, and then press the fuel out to supply fuel to the fuel system.

[0003] Existing fuel pumps often use a gear pump structure inside, which has the characteristic of a strong boosting effect. However, due to the limited volume change of the suction chamber inside the gear pump, the gear pump has a poor fuel supply efficiency and a poor fuel supply effect. Summary of the invention

[0004] The invention provides an automobile electric fuel pump to solve the problem that the gear pump structure used in the existing fuel pump has poor fuel supply efficiency and poor fuel supply effect.

[0005] An automobile electric fuel pump of the present invention adopts the following technical scheme: an automobile electric fuel pump comprises a housing, a gear pump and an adjusting part; the housing comprises an oil storage chamber and an oil discharge chamber arranged in sequence along a first direction, the first direction being a vertical direction, the oil storage chamber being located above the oil discharge chamber, the gear pump being located in the oil discharge chamber, and the gear pump defining an intake chamber and an oil discharge chamber in the oil discharge chamber; the oil storage chamber is filled with oil, and the adjusting part is located in the oil storage chamber; the adjusting part comprises an outer cylinder, an inner cylinder and a rotating part; the inner cylinder is mounted on the upper end of a first filter screen, and is connected to the intake chamber of the gear pump through the first filter screen; the outer cylinder is sleeved on the inner cylinder, and an oil suction space is defined between the outer cylinder and the inner cylinder, and oil can enter the oil suction space; the upper end of the outer cylinder is connected to the top wall of the oil storage chamber The inner cylinder is fixedly connected, and a distance is left between the upper end of the inner cylinder and the top wall of the oil storage chamber; the rotating member includes a rotating shaft, multiple support plates and multiple rotating plates; the rotating shaft is arranged along a first direction and can rotate around its own axis, and multiple support plates are evenly distributed on the rotating shaft around the first direction and can rotate with the rotating shaft, and the rotating plates and the support plates are arranged one by one, and each rotating plate is installed under the support plate corresponding to it through a first elastic member, and can rotate with the support plate corresponding to it; multiple baffles are evenly distributed on the inner circumferential wall surface of the inner cylinder around the first direction, and the rotating plate can contact the baffle when rotating around the first direction, and the rotating plate can rotate around the first direction; and the rotation of the rotating shaft can drive the gear pump to operate, and the operation of the gear pump can discharge the oil into the oil discharge chamber through the oil outlet cavity.

[0006] Further, the lower end of the rotating plate contacts the first filter screen.

[0007] Furthermore, each rotating plate is ball-hinged with its corresponding supporting plate.

[0008] Furthermore, a plurality of oil inlet holes are provided on the outer cylinder.

[0009] Furthermore, the multiple oil inlet holes are divided into multiple groups, each group has multiple oil inlet holes, and the multiple oil inlet holes in the same group are evenly distributed around the first direction on the outer cylinder, and the sizes of the multiple groups of oil inlet holes gradually increase from top to bottom.

[0010] Furthermore, the plurality of oil inlet holes are divided into three groups.

[0011] Furthermore, the rotating shaft extends out of the housing in a first direction and is connected to a driving member of an external device, and the driving member is used to drive the rotating shaft to rotate around its own axis.

[0012] Furthermore, a gear in the gear pump is coaxially arranged with the rotating shaft and can rotate with the rotating shaft.

[0013] Furthermore, the first elastic member is a torsion spring.

[0014] Furthermore, a spacer ring is arranged in the shell, and the first filter is installed on the spacer ring.

[0015] The beneficial effects of the present invention are as follows: an automobile electric fuel pump of the present invention is provided with an adjustment part in the oil storage chamber and a gear pump in the oil discharge chamber. When in use, the rotating shaft is driven to rotate, and the rotation of the rotating shaft will drive the rotating plate to rotate through the support plate. The rotating plate will intermittently contact the baffle and be subject to resistance from the baffle. Under the restriction of the baffle, the rotating plate in contact with the baffle will rotate around the first direction, so that the rotating plate can smoothly pass through the baffle. As the rotating plate continues to rotate, the inner cylinder where the rotating plate is located will generate a negative pressure suction force, so that the oil in the oil suction space can be sucked into the inner cylinder from between the inner cylinder and the inner top wall of the shell, and after passing through the first filter screen in the inner cylinder, it enters the suction chamber of the gear pump downward, filters the impurities in the oil, and prevents the oil from directly entering the suction chamber of the gear pump and causing damage to the gear pump. And the gear pump in the oil discharge chamber will also be driven as the rotating shaft rotates, and the oil will be discharged from the casing through the action of the gear pump to supply oil to the fuel system. The oil storage chamber is used to provide additional oil to the gear pump, which increases the amount of oil supplied by the gear pump and thereby improves the oil supply efficiency of the gear pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1A schematic diagram of the overall structure of an embodiment of an automotive electric fuel pump of the present invention; Figure 2 A front view of the overall structure of an embodiment of an automotive electric fuel pump of the present invention; Figure 3 A schematic diagram of a partial structure of an embodiment of an automobile electric fuel pump of the present invention; Figure 4 A top view of a partial structure of an embodiment of an automotive electric fuel pump of the present invention; Figure 5 It is a schematic diagram of the internal structure of the oil storage chamber and the oil discharge chamber of the overall structure of an embodiment of an automobile electric fuel pump of the present invention; Figure 6 The figure is a schematic diagram of a support plate and a rotating plate of an embodiment of an automobile electric fuel pump of the present invention.

[0018] In the figure: 100, shell; 110, oil storage chamber; 120, oil discharge chamber; 121, outlet; 130, first filter; 140, spacer ring; 200, gear pump; 300, adjustment part; 310, outer cylinder; 311, oil inlet hole; 320, inner cylinder; 321, baffle; 330, rotating part; 331, rotating shaft; 332, support plate; 333, rotating plate; 334, first elastic part; 340, oil suction space. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] An embodiment of an automobile electric fuel pump of the present invention is as follows Figures 1 to 6 shown.

[0021] An automotive electric fuel pump includes a housing 100, a gear pump 200, and a regulating portion 300. The housing 100 includes an oil storage chamber 110 and an oil discharge chamber 120 sequentially arranged along a first direction, the first direction being a vertical direction, the oil storage chamber 110 being located above the oil discharge chamber 120, the gear pump 200 being located in the oil discharge chamber 120, and the gear pump 200 defining a suction chamber and an oil discharge chamber in the oil discharge chamber 120.

[0022] The oil storage chamber 110 is filled with oil, and the regulating part 300 is located in the oil storage chamber 110. The regulating part 300 includes an outer cylinder 310, an inner cylinder 320 and a rotating member 330. The inner cylinder 320 is installed on the upper end of the first filter screen 130, and is connected to the suction chamber of the gear pump 200 through the first filter screen 130. The outer cylinder 310 is sleeved on the inner cylinder 320 and is coaxially arranged with the inner cylinder 320. An oil suction space 340 is defined between the outer cylinder 310 and the inner cylinder 320, and the oil can enter the oil suction space 340. The upper end of the outer cylinder 310 is fixedly connected to the inner top wall of the oil storage chamber 110, and a gap is left between the upper end of the inner cylinder 320 and the inner top wall of the oil storage chamber 110. In the natural state, the height of the oil in the oil suction space 340 is less than the height of the inner cylinder 320. The rotating member 330 includes a rotating shaft 331, a plurality of support plates 332 and a plurality of rotating plates 333. The rotating shaft 331 is arranged along the first direction and can rotate around its own axis. The plurality of support plates 332 are arranged along the second direction, and the second direction is the horizontal direction. The plurality of support plates 332 are evenly distributed around the first direction on the rotating shaft 331 and can rotate with the rotating shaft 331. The plurality of rotating plates 333 are arranged one by one corresponding to the plurality of support plates 332. Each rotating plate 333 is installed below the corresponding support plate 332 through the first elastic member 334 and can rotate with the corresponding support plate 332. The first elastic member 334 is a torsion spring. A plurality of baffles 321 are evenly distributed around the first direction on the inner circumferential wall surface of the inner cylinder 320. The rotating plate 333 can contact the baffle 321 when rotating around the first direction, and the rotating plate 333 can rotate around the first direction. The rotating shaft 331 can rotate to drive the gear pump 200 to operate, and the gear pump 200 can operate to discharge the oil from the oil discharge chamber 120 through the oil outlet cavity.

[0023] Specifically, the rotating shaft 331 extends out of the housing 100 along a first direction and is connected to a driving member of an external device, and the driving member is used to drive the rotating shaft 331 to rotate around its own axis. The driving member is a motor.

[0024] The gear pump 200 is a prior art. A gear in the gear pump 200 is coaxially arranged with the rotating shaft 331 and can rotate along with the rotating shaft 331 , so that when the rotating shaft 331 rotates, the gear pump 200 can be operated.

[0025] The oil discharge chamber 120 is provided with an inlet and an outlet 121, and a second filter is provided at the inlet. By providing the second filter, the oil entering the oil discharge chamber 120 can be filtered. The gears in the gear pump 200 are meshed to suck the oil from the inlet and discharge it from the outlet 121 to supply oil to the fuel system. The oil storage chamber 110 is provided with an oil inlet, and the oil inlet and the inlet are both connected to an external oil tank. The oil storage chamber 110 and the oil discharge chamber 120 are supplied with oil through the oil tank.

[0026] In this embodiment, the regulating part 300 is arranged in the oil storage chamber 110, and the gear pump 200 is arranged in the oil discharge chamber 120. When in use, the rotating shaft 331 is driven to rotate, and the rotating shaft 331 rotates to drive the rotating plate 333 to rotate through the support plate 332. The rotating plate 333 will intermittently contact with the baffle 321 and receive resistance from the baffle 321. Under the restriction of the baffle 321, the rotating plate 333 in contact with the baffle 321 will rotate around the first direction, so that the rotating plate 333 can smoothly pass through the baffle 321.

[0027] As the rotating plate 333 rotates continuously, the inner cylinder 320 where the rotating plate 333 is located will generate a negative pressure suction force, so that the oil in the oil suction space 340 can be sucked into the inner cylinder 320 from between the inner cylinder 320 and the inner top wall of the shell 100, and then pass through the first filter 130 in the inner cylinder 320 and enter the suction chamber of the gear pump 200 downward, filter the impurities in the oil, and prevent the oil from directly entering the suction chamber of the gear pump 200 and causing damage to the gear pump 200. Due to the insufficient volume of the suction chamber, the oil in the suction chamber will be squeezed into the oil outlet chamber by these oils, and then discharged from the outlet 121 to supply oil to the fuel system. According to the known suction chamber is in a negative pressure state, the oil outlet chamber is in a positive pressure state, and the negative pressure of the suction chamber is made greater than the negative pressure of the inner cylinder 320, thereby preventing the oil in the suction chamber from being back-drawn to the inner cylinder 320 through the first filter 130. Furthermore, the gear pump 200 in the oil discharge chamber 120 will also be driven as the rotating shaft 331 rotates, and the oil will be discharged from the housing 100 through the operation of the gear pump 200 to supply oil to the fuel system. The oil storage chamber 110 is used to provide additional oil to the gear pump 200, thereby increasing the amount of oil supplied by the gear pump 200 and thereby improving the oil supply efficiency of the gear pump 200.

[0028] When the rotating plate 333 rotates around the first direction under the restriction of the baffle 321, the inclination of the rotating plate 333 is always changing, which will cause the negative pressure suction force generated by the inner cylinder 320 on the oil through the rotating plate 333 to also change continuously, thereby causing the oil in the oil suction space 340 to fluctuate continuously and be in a turbulent state. Through the flow of the oil, the thermal boundary layer of the oil in the oil suction space 340 can be destroyed. This arrangement is because in the process of the rotating shaft 331 driving the support plate 332 and the rotating plate 333 to rotate, due to the influence of mechanical friction and negative pressure, the temperature of the oil in the inner cylinder 320 will be higher than the temperature of the oil in the oil suction space 340 to a certain extent. By accelerating the flow of the oil in the oil suction space 340, the oil in the oil suction space 340 can dissipate heat faster, so that the temperature of the oil in the inner cylinder 320 is transferred to the oil suction space 340 and dissipated through the oil suction space 340, thereby improving the heat dissipation effect of the oil in the inner cylinder 320 to a certain extent.

[0029] In this embodiment, the lower end of the rotating plate 333 contacts the first filter screen 130 .

[0030] By making the lower end of the rotating plate 333 contact with the first filter screen 130 , the first filter screen 130 can be cleaned to a certain extent during the rotation of the rotating plate 333 .

[0031] In this embodiment, a spacer ring 140 is disposed in the housing 100 , and the first filter screen 130 is mounted on the spacer ring 140 .

[0032] In this embodiment, a plurality of oil inlet holes 311 are formed on the outer cylinder 310 , and the oil in the oil storage chamber 110 can flow into the oil suction space 340 through the oil inlet holes 311 .

[0033] Furthermore, the multiple oil inlet holes 311 are divided into multiple groups, specifically three groups. Each group has multiple oil inlet holes 311, and the multiple oil inlet holes 311 in the same group are evenly distributed around the first direction on the outer cylinder 310, and the sizes of the multiple groups of oil inlet holes 311 gradually increase from top to bottom.

[0034] By providing a plurality of groups of oil inlet holes 311 and gradually increasing the sizes of the plurality of groups of oil inlet holes 311 from top to bottom, when the oil at the upper part of the oil suction space 340 is sucked, the oil in the oil storage chamber 110 will enter the oil suction space 340 from the oil inlet holes 311. Since the oil inlet holes 311 at the lower part are larger than the oil inlet holes 311 at the upper part, the oil can more easily enter the oil suction space 340 from the oil inlet holes 311 at the lower part, thereby enabling the oil originally located at the lower part of the oil suction space 340 to move upward and can also be sucked for use. The flow of the oil is also beneficial to the heat dissipation of the oil, further improving the heat dissipation effect of the oil in the oil suction space 340.

[0035] In this embodiment, each rotating plate 333 is ball-jointed to its corresponding supporting plate 332 .

[0036] By making the rotating plate 333 and its corresponding support plate 332 ball-hinged, when the rotating plate 333 contacts the baffle plate 321, the lower end of the rotating plate 333 will tilt in the second direction based on the rotating plate 333 rotating around the first direction, so that the first filter screen 130 can be cleaned along the second direction based on the circumferential rotation of the rotating plate 333 to further improve the cleaning effect of the first filter screen 130.

[0037] In combination with the above embodiments, the specific working process is as follows: When in use, the rotating shaft 331 is driven to rotate. The rotation of the rotating shaft 331 will drive the rotating plate 333 to rotate through the support plate 332. The rotating plate 333 will intermittently contact the baffle 321 and be subject to resistance from the baffle 321. Under the restriction of the baffle 321, the rotating plate 333 in contact with the baffle 321 will rotate around the first direction, so that the rotating plate 333 can pass through the baffle 321 smoothly.

[0038] As the rotating plate 333 continues to rotate, the inner cylinder 320 where the rotating plate 333 is located will generate a negative pressure suction force, so that the oil in the oil suction space 340 can be sucked into the inner cylinder 320 from between the inner cylinder 320 and the inner top wall of the shell 100, and then pass through the first filter screen 130 in the inner cylinder 320 and downwardly enter the suction chamber of the gear pump 200, thereby filtering impurities in the oil and preventing the oil from directly entering the gear pump 200 and causing damage to the gear pump 200.

[0039] Since the volume of the suction chamber is insufficient, the oil in the suction chamber will be squeezed into the oil outlet chamber by the oil, and then discharged from the outlet 121 to supply oil to the fuel system. The gear pump 200 in the oil discharge chamber 120 will also be driven to operate with the rotation of the rotating shaft 331, and the oil will be discharged from the housing 100 through the operation of the gear pump 200 to supply oil to the fuel system. The oil storage chamber 110 is used to provide additional oil to the gear pump 200, which increases the oil volume supplied by the gear pump 200, thereby improving the oil supply efficiency of the gear pump 200.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automotive electric fuel pump, characterized in that: It includes a housing, a gear pump and a regulating part; the housing includes an oil storage chamber and an oil discharge chamber arranged in sequence along a first direction, the first direction is a vertical direction, the oil storage chamber is located above the oil discharge chamber, the gear pump is located in the oil discharge chamber, and the gear pump defines a suction chamber and an oil discharge chamber in the oil discharge chamber; The oil storage chamber is filled with oil, and the regulating part is located in the oil storage chamber; the regulating part includes an outer cylinder, an inner cylinder and a rotating member; the inner cylinder is installed on the upper end of the first filter screen and is connected with the suction chamber of the gear pump through the first filter screen; the outer cylinder is sleeved on the inner cylinder, and an oil suction space is defined between the outer cylinder and the inner cylinder, and the oil can enter the oil suction space; the upper end of the outer cylinder is fixedly connected to the top wall of the oil storage chamber, and a distance is left between the upper end of the inner cylinder and the top wall of the oil storage chamber; the rotating member includes a rotating shaft, a plurality of support plates and a plurality of rotating plates; the rotating shaft is arranged along the first direction and can rotate around its own axis Rotate, multiple support plates are evenly distributed on the rotating shaft around the first direction and can rotate with the rotating shaft, the rotating plates and the support plates are arranged one by one, each rotating plate is installed under the corresponding support plate through the first elastic member, and can rotate with the corresponding support plate; multiple baffles are evenly distributed on the inner circumferential wall surface of the inner cylinder around the first direction, the rotating plate can contact the baffle when rotating around the first direction, and the rotating plate can rotate around the first direction; and the rotation of the rotating shaft can drive the gear pump to operate, and the gear pump operation can discharge the oil into the oil discharge chamber through the oil outlet chamber.

2. The automotive electric fuel pump according to claim 1, characterized in that: The lower end of the rotating plate contacts the first filter screen.

3. The automotive electric fuel pump according to claim 1, characterized in that: Each rotating plate is hinged with a corresponding supporting plate ball.

4. The automotive electric fuel pump according to claim 1, characterized in that: The outer cylinder is provided with a plurality of oil inlet holes.

5. The automotive electric fuel pump according to claim 4, characterized in that: The multiple oil inlet holes are divided into multiple groups, each group has multiple oil inlet holes, and the multiple oil inlet holes in the same group are evenly distributed on the outer cylinder around the first direction, and the sizes of the multiple groups of oil inlet holes gradually increase from top to bottom.

6. The automotive electric fuel pump according to claim 5, characterized in that: The multiple oil inlet holes are divided into three groups.

7. The automotive electric fuel pump according to claim 1, characterized in that: The rotating shaft extends out of the housing along a first direction and is connected to a driving member of an external device, and the driving member is used for driving the rotating shaft to rotate around its own axis.

8. The automotive electric fuel pump according to claim 1, characterized in that: In a gear pump, a gear is coaxially arranged with a rotating shaft and can rotate with the rotating shaft.

9. The automotive electric fuel pump according to claim 1, characterized in that: The first elastic member is a torsion spring.

10. The automotive electric fuel pump according to claim 1, characterized in that: A spacer ring is arranged in the shell body, and the first filter screen is installed on the spacer ring.

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