Self-adaptive booster oil pump

Abstract

The invention relates to the technical field of oil pumps, in particular to a self-adaptive booster oil pump which comprises a top plate, an oil supply pipe, an oil return pressure detection assembly, an oil return pipe, a plug, a pump body, a limiting connecting rod, a floating plate, an oil return hose, an oil gathering assembly and an oil inlet pipe assembly. The limiting connecting rods are symmetrically installed on the periphery of the pump body and installed at the bottom of the top plate, the floating plate is installed on the periphery of the pump body, the oil gathering assembly is arranged under the pump body, and the oil return hose is connected to the oil gathering assembly and the oil return pipe assembly. According to the fuel supply device, the fuel inlet pipe assembly immersed in fuel is communicated with the fuel gathering assembly when the fuel tank is at the low fuel level, the fuel flowing out of the fuel return pipe is supplemented into the fuel gathering assembly, and the pump body stably pumps the fuel through the fuel gathering assembly, so that fuel supply of the off-road vehicle is fully guaranteed when the fuel tank is at the low fuel level, and flameout of the off-road vehicle and shaking of an engine are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of oil pumps, and in particular to an adaptive boost oil pump. Background Art

[0002] A booster pump is a device used to increase the oil pressure in a hydraulic system. It is widely used in the automotive, industrial machinery and aviation industries. The booster pump meets the system's need for high-pressure oil by boosting low-pressure oil to high pressure. The main function of a booster pump in a car's fuel tank is to ensure that the fuel in the fuel system is stably supplied to the engine. It increases the pressure of the fuel to ensure that normal fuel flow is maintained even when the engine requires high-pressure fuel. This is especially important for high-performance engines and modern cars that require precise fuel injection.

[0003] Off-road vehicles often travel on complex terrains, such as steep slopes, sandy or muddy roads. These environments may cause uneven distribution of fuel in the fuel tank. Especially when the fuel tank is low and the fuel cannot be replenished in time, the booster pump may be unable to pump fuel to the engine for a short period of time. When the engine fuel supply is insufficient, the off-road vehicle is prone to sudden stalling during driving, or the engine idle speed is unstable, causing damage to the engine. In order to avoid the off-road vehicle stalling or unstable engine idle speed due to insufficient fuel supply when the fuel tank is low, the oil extraction port of the booster pump is often set at a lower position.

[0004] However, during the driving of the off-road vehicle, the fuel level in the fuel tank will fluctuate violently due to the tilt or sudden change of the vehicle, increasing the risk of the oil pump drawing in air. Drawing in air means that the amount of fuel pumped in per unit time is insufficient, so there will still be a problem of insufficient fuel supply in a short period of time, causing the off-road vehicle to suddenly stall during driving and causing damage to the engine.

[0005] Therefore, an adaptive boost oil pump is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an adaptive boost oil pump, which connects the oil inlet pipe assembly immersed in the fuel with the oil gathering assembly when the oil level in the fuel tank is low, and the fuel flowing out of the oil return pipe is supplemented in the oil gathering assembly. The pump body stably extracts fuel through the oil gathering assembly, thereby solving the problem that when the oil level in the fuel tank of an off-road vehicle is low and the fuel level shakes with the driving of the vehicle, resulting in insufficient fuel supply after the boost oil pump draws in air, causing the off-road vehicle to stall. The adaptive boost oil pump has the effect of fully ensuring the fuel supply of the off-road vehicle when the oil level in the fuel tank is low, and avoiding the off-road vehicle from stalling and engine shaking.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] The invention relates to an adaptive boost oil pump, comprising a top plate, an oil supply pipe, an oil return pressure detection assembly, an oil return pipe, and a plug. The oil return pressure detection assembly is installed between the oil supply pipe and the oil return pipe. The pump also comprises a pump body, a limit connecting rod, a floating plate, an oil return hose, an oil gathering assembly, and an oil inlet pipe assembly. The limit connecting rod is symmetrically installed on the periphery of the pump body, and the limit connecting rod is installed on the bottom of the top plate. The floating plate is installed on the periphery of the pump body. The oil gathering assembly is arranged directly below the pump body. The oil return hose is connected between the oil gathering assembly and the oil return pipe assembly. The oil inlet pipe assembly is installed on the periphery of the oil gathering assembly. The oil return pressure detection assembly adaptively adjusts the pump body speed according to the return oil pressure. When the oil level in the fuel tank is lower than the set value, the pump body moves downward to squeeze the oil gathering assembly and extracts fuel through the corresponding oil inlet pipe assembly. When the oil level in the fuel tank is lower than the set value, that is, the fuel liquid level in the fuel tank is lower than the top of the oil gathering assembly.

[0009] The fuel system of an off-road vehicle usually includes a main fuel pump and a boost fuel pump. The boost fuel pump is usually installed in the fuel tank or close to the fuel tank to ensure that it can directly obtain fuel from the fuel tank and increase the pressure. Installing multiple fuel pumps can ensure the fuel supply when the fuel tank has sufficient oil level. However, when the fuel tank is at a low oil level, installing multiple fuel pumps cannot ensure sufficient fuel supply when the off-road vehicle is tilted at a large angle. Therefore, there will be a problem of insufficient fuel supply in a short period of time, and the off-road vehicle will suddenly stall during driving, and the engine idle jitter will cause damage to the engine. In the prior art, in order to avoid the problem of insufficient fuel supply due to low oil level in the fuel tank, the oil extraction port is often set at a lower position in the fuel tank, or the hose is connected to the oil extraction port through a hose and then placed at the lowest point in the fuel tank. However, off-road vehicles often travel on complex terrains, such as steep slopes or roads with irregular pits. When passing through irregular pits, the off-road vehicle will inevitably tilt to one side, causing an imbalance in the oil level. Even if the hose is at the lowest point, the fuel flows to the inclined side, resulting in the inability of the boost pump to extract sufficient fuel through the hose. It can be seen that when the oil level in the fuel tank of the off-road vehicle is low, it is very easy to have a problem of insufficient fuel supply.

[0010] Through the design of the above scheme, when the oil level in the fuel tank is low, the pump body and the float plate continue to move downward due to the decrease in the fuel height. When the pump body moves downward and is completely in contact with the oil gathering assembly, the oil extraction port of the pump body is located in the oil gathering assembly. At this time, the pump body draws fuel through the oil gathering assembly and the return oil pipe that flows back into the oil gathering assembly. When the off-road vehicle tilts at a large angle, multiple oil inlet pipe assemblies located in various locations in the fuel tank are arranged. The pump body can draw fuel through the oil gathering assembly and the corresponding oil inlet pipe assemblies immersed in the fuel to ensure sufficient fuel supply.

[0011] Preferably, the return oil pressure detection assembly includes a connecting frame, a partition, a speed sensor, a data line, a PLC and a circuit board, the connecting frame is connected between the oil supply pipe and the oil return pipe, the partition is installed on the surface of the connecting frame and extends to the inside of the connecting frame, the speed sensor is installed on the side wall of the connecting frame, the circuit board is installed on the surface of the top plate, the PLC is installed on the surface of the circuit board, the data line is connected between the speed sensor and the PLC, the PLC is connected to the pump body through the circuit board, and an impeller connected to the rotating shaft of the speed sensor is installed on the inner wall of the connecting frame.

[0012] To ensure sufficient fuel supply pressure, the oil pressure pumped out by the pump body is usually higher than the required oil pressure, so there will be a phenomenon of fuel reflux. By detecting the pressure of the refluxed fuel, the pumping speed of the pump body can be reduced in time when the pumped oil pressure is much higher than the required oil pressure, so as to realize adaptive adjustment of the fuel supply pressure, which is beneficial to extend the service life of the pump body; and when the oil level in the fuel tank is low, the return oil pressure is low, and the fuel supply can be ensured to be sufficient by increasing the pumping speed in time.

[0013] Preferably, the partition includes a sealing strip, a rotating plate and a limit block, the sealing strip is attached to the surface of the connecting frame, the rotating plate is rotatably installed at the bottom of the sealing strip, the limit block is attached to the inner wall of the connecting frame, and the limit block is arranged on the side of the rotating plate close to the oil supply pipe.

[0014] Under the action of the partition, the refluxed fuel can only enter the return pipe through the fuel supply pipe, and the fuel in the return pipe cannot flow into the fuel supply pipe, thereby avoiding turbulence during fuel supply.

[0015] Preferably, the pump body includes an insulating cylinder, a cylinder cover, a power supply line, an oil outlet pipe, a variable speed motor, pump blades, an oil extraction hole and a conical seat. The cylinder cover is seal-mounted on the inner circumference of the insulating cylinder, the power supply line passes through the cylinder cover, the oil outlet pipe is mounted on the cylinder cover, the variable speed motor is mounted inside the insulating cylinder, the pump blades are mounted on the output shaft of the variable speed motor, the variable speed motor is connected to the circuit board through the power supply line, the oil extraction port is constructed at the bottom of the insulating cylinder, and the conical seat is mounted at the bottom of the insulating cylinder.

[0016] The variable speed motor can be flexibly adjusted according to the pressure detection value of the return oil pressure detection component, and the pump body can maintain relative balance and float on the oil surface under the action of the floating plate and the limit connecting rod. When the oil level in the oil tank is low, the bottom of the pump body can fit with the top of the oil gathering component.

[0017] Preferably, the oil gathering assembly comprises an arc plate, a vertical plate, a conical ring, a docking rod, a threaded ring, a closing plate, an insertion rod and a limit spring, the arc plate annular array is distributed below the conical seat, the arc plate and the vertical plate are staggered, and the arc plate fits against the side wall of the vertical plate, the conical ring is installed between the top of the arc plate and the top of the vertical plate, the docking rod passes through the conical ring and is slidably connected to the vertical plate, the threaded ring is installed on the outer wall of the vertical plate, and the side wall of the vertical plate is constructed with a circular hole located on the inner side of the threaded ring, the closing plate is installed at the bottom of the docking rod, and the closing plate closes the circular hole when the docking rod is not under pressure, the vertical plate is installed with an insertion rod, the limit spring is sleeved on the outer periphery of the insertion rod, and the top of the limit spring abuts against the closing plate, and the inner periphery of the closing plate is constructed with a cylindrical groove adapted to the insertion rod.

[0018] Under the action of the oil gathering assembly, when the oil level in the fuel tank is low, the bottom of the pump body fits against the conical ring, and the closing plate moves downward together when the docking rod is under pressure, opening the circular hole so that the pump body can extract the fuel flowing into the corresponding oil inlet pipe assembly through the oil gathering assembly; when the oil level in the fuel tank is low, when the bottom of the pump body does not fit against the conical ring, the oil gathering assembly can gather the fuel returning from the return oil pipe, and the distance between the oil extraction port and the oil gathering assembly is small, so that the pump body can extract sufficient fuel to supply the engine.

[0019] Preferably, the oil inlet pipe assembly includes an oil inlet branch pipe, a rotating plate, a conical head, a hollow cylinder, a cross bar, a floating plate, a limit cylinder and a support spring. The oil inlet branch pipe is screwed to a threaded ring, the rotating plate is rotatably installed on the inner wall of the oil inlet branch pipe, the conical head is installed at the end of the oil inlet branch pipe, the hollow cylinder is installed at the bottom of the conical head, the cross bar is installed at equal intervals on the inner circumference of the hollow cylinder, the floating plate is limited and fitted on the top of the hollow cylinder, the limit cylinder is installed at the end of the cross bar, the support spring is installed on the inner circumference of the limit cylinder, and the top of the support spring is connected to the floating plate.

[0020] When the oil level in the off-road vehicle's fuel tank is low and the vehicle passes through a large pothole and tilts to one side, the fuel flows to the tilted side in the fuel tank. There will always be one or more of the multiple fuel inlet pipe assemblies immersed in the fuel. The floating plate moves downward due to the gravity of the fuel, and the fuel enters the fuel inlet branch pipe through the hollow cylinder, and can then be extracted by the pump body, ensuring that when the oil level in the off-road vehicle's fuel tank is low and the vehicle tilts to one side, the fuel flows to one side, which can also ensure sufficient fuel supply.

[0021] Preferably, the conical surface of the conical seat is located on the outside, and the conical surface of the conical ring is located on the inside.

[0022] When the oil level in the oil tank is low and the pump body moves to the lowest position, the conical ring and the conical seat fit completely together, thereby achieving relative sealing between the pump body and the oil collecting component, which is beneficial to improving the subsequent oil pumping effect.

[0023] Preferably, a guide block is fitted on the inner wall of the connecting frame, and the guide block is located outside the impeller.

[0024] The guide block can be used to guide the return fuel to pass through the impeller smoothly, so as to detect the return oil pressure more accurately.

[0025] Preferably, the cross-section of the docking rod in top view is an isosceles trapezoid, with the shorter side facing the outside of the conical ring.

[0026] The fuel that flows into the oil gathering assembly through the oil inlet pipe assembly can smoothly pass through the circular hole and enter between the arc plate and the vertical plate due to the design of the docking rod shape.

[0027] Preferably, a docking groove is configured at the bottom of the conical seat, and the docking groove is adapted to the docking rod.

[0028] Under the action of the docking groove, the conical seat and the docking rod can be accurately aligned.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention cooperates with the pump body, the oil gathering assembly and the oil inlet pipe assembly. When the oil level in the fuel tank is low, the bottom of the pump body fits with the oil gathering assembly. When the off-road vehicle tilts to one side at a large angle, the fuel flows to the corresponding low place, and the oil inlet pipe assembly immersed in the fuel is connected with the oil gathering assembly under the fuel pressure. At this time, the pump body extracts fuel through the oil gathering assembly and the corresponding oil inlet pipe assembly, which can reduce the intake of air, thereby avoiding the off-road vehicle from stalling due to insufficient fuel supply when the off-road vehicle shakes at a large angle when the oil level in the fuel tank is low. The driving stability of the off-road vehicle when the oil level in the fuel tank is low can be fully guaranteed, which is beneficial to extending the service life of the engine.

[0031] 2. The present invention can detect the return oil pressure during normal use through the cooperation of the return oil pressure detection component and the pump body, and then adaptively adjust the pumping speed of the pump body. When the oil level in the fuel tank is low but the off-road vehicle is not in a state of large-angle tilt, the pumping speed of the pump body can be increased to ensure sufficient fuel supply, thereby effectively preventing the off-road vehicle from stalling during driving, which is beneficial to extending the engine's service life.

[0032] 3. The present invention cooperates with the oil return pipe and the oil gathering assembly. When the oil level in the fuel tank is low, the fuel flowing out of the oil return pipe gathers in the oil gathering assembly, and the returned fuel can enter the oil inlet pipe assembly to squeeze out the air in the oil inlet pipe assembly, so that when the pump body draws fuel, the amount of air drawn in is small, thereby ensuring sufficient fuel supply and preventing the off-road vehicle engine from shaking or even stalling due to insufficient fuel supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the oil return pressure detection assembly of the present invention;

[0035] Figure 3 is a cross-sectional view of a communication frame of the present invention;

[0036] Figure 4 is a cross-sectional view of a pump body of the present invention;

[0037] Figure 5 It is a structural schematic diagram of the oil-collecting assembly of the present invention;

[0038] Figure 6 is a cross-sectional view of a vertical board of the present invention;

[0039] Figure 7 is a cross-sectional view of the oil inlet pipe assembly of the present invention;

[0040] Figure 8 It is a structural schematic diagram of the conical seat of the present invention.

[0041] In the figure: 1, top plate; 2, oil supply pipe; 3, oil return pressure detection assembly; 31, connecting frame; 32, partition; 321, sealing strip; 322, rotating plate; 323, limit block; 33, speed sensor; 331, guide block; 332, impeller; 34, data line; 35, PLC; 36, circuit board; 4, oil return pipe; 5, plug; 6, pump body; 61, insulating cylinder; 62, cylinder cover; 63, power supply line; 64, oil outlet pipe; 65, variable speed motor; 66, pump blade; 67, oil extraction port; 68, conical seat; 681, Connecting groove; 7. Limit connecting rod; 8. Floating plate; 9. Oil return hose; 10. Oil gathering assembly; 101. Arc plate; 102. Vertical plate; 1021. Round hole; 103. Conical ring; 104. Docking rod; 105. Threaded ring; 106. Closing plate; 1061. Cylindrical groove; 107. Insert rod; 108. Limit spring; 11. Oil inlet pipe assembly; 111. Oil inlet branch pipe; 112. Rotating plate; 113. Conical head; 114. Hollow cylinder; 115. Cross bar; 116. Floating plate; 117. Limit cylinder; 118. Support spring. DETAILED DESCRIPTION

[0042] 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.

[0043] See also Figures 1 to 8 The present invention provides an adaptive boost oil pump, and the technical solution is as follows:

[0044] Reference Figure 1 , an adaptive boost oil pump, comprising a top plate 1, an oil supply pipe 2, an oil return pressure detection assembly 3, an oil return pipe 4, and a plug 5, wherein the oil return pressure detection assembly 3 is installed between the oil supply pipe 2 and the oil return pipe 4, the oil supply pipe 2 and the oil return pipe 4 are both installed on the surface of the top plate 1, the plug 5 is installed on the top of the top plate 1, and is used to connect with the circuit to supply power to the oil return pressure detection assembly 3 and other electrical equipment, and also comprises a pump body 6, a limit connecting rod 7, a floating plate 8, an oil return hose 9, an oil gathering assembly 10 and an oil inlet pipe assembly 11, the limit connecting rod 7 is symmetrically installed on the outer periphery of the pump body 6, the limit connecting rod 7 is a limit structure, and its height can automatically change according to the height of the fuel liquid level in the fuel tank, when the fuel tank is at a low oil level, the pump body 6 continuously moves down to the lowest position, at which time the limit connecting rod 7 is in the longest state, and the limit connecting rod 7 is installed at the bottom of the top plate 1, the floating plate 8 is installed on the outer periphery of the pump body 6, and the floating plate 8 provides buoyancy for the pump body 6, so that the bottom of the pump body 6 can always be in contact with the fuel liquid The oil collecting component 10 is arranged directly below the pump body 6. When the pump body 6 drops due to the influence of the fuel liquid level, the bottom of the pump body 6 can fit with the oil collecting component 10. The oil return hose 9 is connected between the oil collecting component 10 and the oil return pipe 4 component. When the oil level in the fuel tank is low, the pump body 6 draws the fuel flowing into the oil collecting component 10 through the oil return pipe 4 to ensure sufficient supply of fuel. The oil inlet pipe component 11 is installed on the periphery of the oil collecting component 10. In addition, when the off-road vehicle tilts at a large angle, the pump body 6 draws the fuel entering the corresponding oil inlet pipe component 11 through the oil collecting component 10 to ensure sufficient supply of fuel in a short time; the return oil pressure detection component 3 adaptively adjusts the rotation speed of the pump body 6 according to the return oil pressure; when the oil level in the fuel tank is low, the return oil pressure is low, and increasing the extraction speed can ensure sufficient supply of fuel. When the oil level in the fuel tank is lower than the set value, the pump body 6 moves downward to squeeze the oil collecting component 10 and draws fuel through the corresponding oil inlet pipe component 11.

[0045] As an embodiment of the present invention, refer to Figure 2 and Figure 3The return oil pressure detection component 3 includes a connecting frame 31, a partition 32, a speed sensor 33, a data line 34, a PLC 35 and a circuit board 36. The connecting frame 31 is connected between the oil supply pipe 2 and the return oil pipe 4. The partition 32 is installed on the surface of the connecting frame 31 and extends to the inside of the connecting frame 31. The speed sensor 33 is installed on the side wall of the connecting frame 31. The speed sensor 33 is installed on the outer wall of the connecting frame 31, and its rotating shaft extends to the inside of the connecting frame 31. The circuit board 36 is installed on the surface of the top plate 1, and the PLC 35 is installed on the surface of the circuit board 36. The data line 34 is connected between the speed sensor 33 and the PLC 35. The data line 34 plays a role in data transmission, and the speed value of the speed sensor 33 is fed back to the PLC 35. The PLC 35 is connected to the pump body 6 through the circuit board 36. The PLC 35 adjusts the speed value through the circuit board 36 according to the speed value. The extraction speed of the pump body 6, the inner wall of the connecting frame 31 is equipped with an impeller 332 connected to the rotating shaft of the speed sensor 33, when the reflux fuel flows through the connecting frame 31, it will drive the impeller 332 to rotate, and then the impeller 332 will drive the rotating shaft of the speed sensor 33 to rotate, PLC35 calculates the unit time flow rate of the reflux fuel according to the impeller 332 speed and the formula, and the reflux fuel pressure value can be calculated in combination with the cross-section of the connecting frame 31, the partition 32 includes a sealing strip 321, a rotating plate 322 and a limit block 323, the sealing strip 321 is attached to the surface of the connecting frame 31, the rotating plate 322 is rotatably installed at the bottom of the sealing strip 321, the limit block 323 is attached to the inner wall of the connecting frame 31, and the limit block 323 is set on the side of the rotating plate 322 close to the oil supply pipe 2, and the limit of the limit block 323 prevents the rotating plate 322 from deflecting to the side of the oil supply pipe 2.

[0046] As an embodiment of the present invention, refer to Figure 4The pump body 6 includes an insulating cylinder 61, a cylinder cover 62, a power supply line 63, an oil outlet pipe 64, a variable speed motor 65, a pump blade 66, an oil extraction hole and a conical seat 68. The cylinder cover 62 is sealed and installed on the inner periphery of the insulating cylinder 61. The cylinder cover 62 and the insulating cylinder 61 are made of insulating plastic, which can achieve a better insulation effect. The power supply line 63 runs through the cylinder cover 62. A soft protective sleeve is attached to the outer side of the power supply line 63 to prevent the power supply line 63 from being exposed. The oil outlet pipe 64 is installed on the cylinder cover 62. The oil outlet pipe 64 is connected to the oil supply pipe 2. The variable speed motor 65 is installed inside the insulating cylinder 61. The pump blade 66 is installed on the output shaft of the variable speed motor 65. The output shaft of the variable speed motor 65 drives the pump blade 66 to rotate. By pumping oil The fuel entering the insulating cylinder 61 through the hole can be accelerated to flow into the oil outlet pipe 64, thereby realizing fuel pressurization. The variable speed motor 65 is connected to the circuit board 36 through the power supply line 63. The outer side of the variable speed motor 65 and the connection between the variable speed motor 65 and the power supply line 63 are insulated and anti-static treated to prevent the electric spark generated by the variable speed motor 65 when working from igniting the fuel; the oil extraction port 67 is constructed at the bottom of the insulating cylinder 61, and the oil extraction port 67 is trumpet-shaped, which is conducive to the rapid entry of the fuel into the insulating cylinder 61. The conical seat 68 is installed at the bottom of the insulating cylinder 61, and the conical seat 68 has a certain height. When the conical seat 68 is completely in contact with the conical ring 103, the bottom of the insulating cylinder 61 does not contact the conical ring 103.

[0047] As an embodiment of the present invention, refer to Figure 5 and Figure 6 The oil collecting assembly 10 comprises an arc plate 101, a vertical plate 102, a conical ring 103, a docking rod 104, a threaded ring 105, a closing plate 106, a plug rod 107 and a limit spring 108. The arc plates 101 are arranged in an annular array below the conical seat 68. The arc plates 101 and the vertical plates 102 are arranged alternately, and the arc plates 101 are fitted with the side walls of the vertical plates 102. Figure 5The number of the arc plates 101 and the vertical plates 102 shown are both four. When designing and using, the number of the arc plates 101 and the vertical plates 102 can be changed according to the size of the fuel tank to increase the number of the fuel inlet pipe assemblies 11, so that the fuel inlet pipe assemblies 11 can be distributed in the fuel tank with a higher density; the number of the vertical plates 102 corresponds to the number of the fuel inlet pipe assemblies 11, and the conical ring 103 is installed between the top of the arc plate 101 and the top of the vertical plate 102. When the oil level in the fuel tank is lower than the set value, that is, the fuel liquid level in the fuel tank The height is lower than the top of the conical ring 103. At this time, the fuel cannot flow into the space between the arc plate 101 and the vertical plate 102 by natural flow, and the bottom of the pump body 6 fits with the conical ring 103 after it moves down; the docking rod 104 passes through the conical ring 103 and is slidably connected with the vertical plate 102, and the threaded ring 105 is installed on the outer wall of the vertical plate 102. The threaded ring 105 is convenient for installing and connecting the oil inlet pipe assembly 11 with the vertical plate 102, and the side wall of the vertical plate 102 is constructed with a circular hole 1 located on the inner side of the threaded ring 105. 021, the fuel drawn into the oil inlet pipe assembly 11 needs to pass through the circular hole 1021, the closing plate 106 is installed at the bottom of the docking rod 104, and the closing plate 106 closes the circular hole 1021 when the docking rod 104 is not under pressure. When the docking rod 104 is not under pressure, it means that the oil level in the fuel tank is high. When the fuel shakes, the floating plate 8 can adapt to the fuel shaking and keep the oil extraction port 67 immersed in the fuel. The vertical plate 102 is installed with a plug rod 107 inside, and the limit spring 108 is sleeved on the outer periphery of the plug rod 107. 07 and the return spring, under normal conditions, the closing plate 106 can be pushed up to close the circular hole 1021, and the top of the limit spring 108 abuts against the closing plate 106, and the inner periphery of the closing plate 106 is constructed with a cylindrical groove 1061 adapted to the insertion rod 107. Under the action of the cylindrical groove 1061, when the closing plate 106 moves downward, the insertion rod 107 can continuously enter the cylindrical groove 1061, and the cross-section of the docking rod 104 in a top view is an isosceles trapezoid, and the shorter side faces the outside of the conical ring 103.

[0048] As an embodiment of the present invention, refer to Figure 7The oil inlet pipe assembly 11 includes an oil inlet branch pipe 111, a rotating plate 112, a conical head 113, a hollow cylinder 114, a cross bar 115, a floating plate 116, a limiting cylinder 117 and a supporting spring 118. The oil inlet branch pipe 111 is screwed to the threaded ring 105, the rotating plate 112 is rotatably mounted on the inner wall of the oil inlet branch pipe 111, the conical head 113 is mounted at the end of the oil inlet branch pipe 111, the hollow cylinder 114 is mounted at the bottom of the conical head 113, the cross bar 115 is evenly spaced and mounted on the inner periphery of the hollow cylinder 114, the floating plate 116 is limited and fitted on the top of the hollow cylinder 114, and the limiting cylinder 117 is mounted on the bottom of the conical head 113. Installed at the end of the cross bar 115, the support spring 118 is installed on the inner circumference of the limit cylinder 117, and the top of the support spring 118 is connected to the floating plate 116. The top of the hollow cylinder 114 is constructed with multiple oil inlet grooves. The floating plate 116 fits in the oil inlet groove under the action of the limit cylinder 117 and the support spring 118. When the hollow cylinder 114 is immersed in fuel, the floating plate 116 will be pushed downward under the action of the fuel pressure until the oil inlet branch pipe 111 and the hollow cylinder 114 are completely filled with fuel. At this time, the pressure inside and outside the hollow cylinder 114 is balanced, and the floating plate 116 fits in the oil inlet groove.

[0049] As an embodiment of the present invention, refer to Figure 6 and Figure 8 The conical surface of the conical seat 68 is located on the outside, and the conical surface of the conical ring 103 is located on the inside. When the pump body 6 moves down to the lowest position, the conical ring 103 is completely in contact with the conical surface of the conical seat 68.

[0050] As an embodiment of the present invention, refer to Figure 7 A guide block 331 is installed on the inner wall of the connecting frame 31, and the guide block 331 is located on the outside of the impeller 332. Under the action of the guide block 331, the return fuel can be guided to pass through the impeller 332, thereby driving the impeller 332 to rotate at a certain speed, so that the rotation speed is detected by the speed sensor 33, and then the return oil pressure is calculated according to the speed through the PLC35.

[0051] As an embodiment of the present invention, refer to Figure 8 A docking groove 681 is constructed at the bottom of the conical seat 68, and the docking groove 681 is adapted to the docking rod 104. When the pump body 6 moves downward as the fuel liquid level drops, the conical seat 68 contacts the conical ring 103. Through the cooperation of the docking groove 681 and the docking rod 104, the stability of the pump body 6 and the oil gathering assembly 10 when docking can be improved during the driving of the off-road vehicle.

[0052] Working principle: When the liquid level in the off-road vehicle's fuel tank is high, when the off-road vehicle passes through a deep pit road, although the oil will continue to shake, at this time the floating plate 8 and the bottom of the insulating cylinder 61 float on the surface of the oil, and the height can change with the liquid level. The fuel can continuously enter the insulating cylinder 61 through the oil extraction port 67, and the pump blade 66 is driven to rotate under the action of the variable speed motor 65, and the fuel is continuously pumped into the oil outlet pipe 64, and supplied to the engine through the oil supply pipe 2;

[0053] When the oil level in the off-road vehicle's fuel tank is low, the floating plate 8 moves downward with the pump body 6. When the conical seat 68 moves downward to fit with the conical ring 103, the docking groove 681 at the bottom of the conical seat 68 contacts and fits with the docking rod 104, and continuously presses the docking rod 104 downward. The downward movement of the docking rod 104 will drive the closing plate 106 to move downward together, thereby causing the closing plate 106 to be misaligned with the circular hole 1021, so that the interior of the oil inlet pipe assembly 11 is connected with the interior of the oil collection assembly 10. When the closing plate 106 moves downward, the limit spring 108 is in a compressed state, and most of the insertion rod 107 enters the cylindrical groove 1061 of the closing plate 106. When the off-road vehicle is in a stable driving state, the fuel exerts pressure on the floating plate 116, and the fuel is sucked into the oil collection assembly 10 by the pump body 6 after passing through the hollow cylinder 114 and the oil inlet branch pipe 111, and then is pumped into the oil supply pipe 2 through the oil outlet pipe 64.

[0054] When the oil level in the fuel tank is low, the return oil pressure is low. PLC35 calculates the return oil pressure based on the speed of the impeller 332 fed back by the speed sensor 33. When the return oil pressure is lower than the set low value, PLC35 increases the speed of the variable speed motor 65 through the circuit board 36, thereby increasing the fuel extraction speed. The fuel that flows into the oil collection assembly 10 through the return oil pipe 4 and the return oil hose 9 is first extracted by the pump body 6 and supplied to the engine for use; when the oil level in the fuel tank is low and the off-road vehicle tilts at a large angle when passing through a deep pit, the fuel will flow to the inclined side of the fuel tank. At this time, multiple oil inlet pipe assemblies 11 cannot be immersed in the fuel at the same time. Therefore, the return oil pressure in the return oil pipe 4 is significantly reduced. PLC35 promptly further increases the speed of the variable speed motor 65 according to the circuit board 36 to ensure that the fuel can be adequately supplied when the off-road vehicle is tilted.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adaptive boost oil pump, comprising a top plate (1), an oil supply pipe (2), an oil return pressure detection assembly (3), an oil return pipe (4), and a plug (5), wherein the oil return pressure detection assembly (3) is installed between the oil supply pipe (2) and the oil return pipe (4), and is characterized in that: The invention also comprises a pump body (6), a limit connecting rod (7), a floating plate (8), an oil return hose (9), an oil collecting component (10) and an oil inlet pipe component (11), wherein the limit connecting rod (7) is symmetrically mounted on the outer periphery of the pump body (6), and the limit connecting rod (7) is mounted on the bottom of the top plate (1), the floating plate (8) is mounted on the outer periphery of the pump body (6), the oil collecting component (10) is arranged directly below the pump body (6), the oil return hose (9) is connected between the oil collecting component (10) and the oil return pipe (4) component, the oil inlet pipe component (11) is mounted on the outer periphery of the oil collecting component (10), the oil return pressure detection component (3) adaptively adjusts the rotation speed of the pump body (6) according to the return oil pressure, and when the oil level in the oil tank is lower than a set value, the pump body (6) moves downward to squeeze the oil collecting component (10), and extracts fuel through the corresponding oil inlet pipe component (11).

2. The adaptive boost oil pump according to claim 1, characterized in that: The oil return pressure detection assembly (3) comprises a connecting frame (31), a partition (32), a rotation speed sensor (33), a data line (34), a PLC (35) and a circuit board (36); the connecting frame (31) is connected between the oil supply pipe (2) and the oil return pipe (4); the partition (32) is mounted on the surface of the connecting frame (31) and extends to the inside of the connecting frame (31); the rotation speed sensor (33) is mounted on the side wall of the connecting frame (31); the circuit board (36) is mounted on the surface of the top plate (1); the PLC (35) is mounted on the surface of the circuit board (36); the data line (34) is connected between the rotation speed sensor (33) and the PLC (35); the PLC (35) is connected to the pump body (6) via the circuit board (36); and an impeller (332) connected to the rotating shaft of the rotation speed sensor (33) is mounted on the inner wall of the connecting frame (31).

3. The adaptive boost oil pump according to claim 2, characterized in that: The partition (32) comprises a sealing strip (321), a rotating plate (322) and a limit block (323); the sealing strip (321) is attached to the surface of the connecting frame (31); the rotating plate (322) is rotatably mounted on the bottom of the sealing strip (321); the limit block (323) is attached to the inner wall of the connecting frame (31); and the limit block (323) is arranged on a side of the rotating plate (322) close to the oil supply pipe (2).

4. The adaptive boost oil pump according to claim 3, characterized in that: The pump body (6) comprises an insulating cylinder (61), a cylinder cover (62), a power supply line (63), an oil outlet pipe (64), a variable speed motor (65), pump blades (66), an oil extraction hole and a conical seat (68); the cylinder cover (62) is sealed and installed on the inner periphery of the insulating cylinder (61); the power supply line (63) passes through the cylinder cover (62); the oil outlet pipe (64) is installed on the cylinder cover (62); the variable speed motor (65) is installed inside the insulating cylinder (61); the pump blades (66) are installed on the output shaft of the variable speed motor (65); the variable speed motor (65) is connected to the circuit board (36) via the power supply line (63); the oil extraction port (67) is constructed at the bottom of the insulating cylinder (61); and the conical seat (68) is installed at the bottom of the insulating cylinder (61).

5. The adaptive boost oil pump according to claim 4, characterized in that: The oil collecting assembly (10) comprises an arc plate (101), a vertical plate (102), a conical ring (103), a docking rod (104), a threaded ring (105), a closing plate (106), a plug rod (107) and a limit spring (108). The arc plates (101) are arranged in an annular array below the conical seat (68). The arc plates (101) and the vertical plates (102) are arranged alternately, and the arc plates (101) and the vertical plates (102) are fitted with the side walls. The conical ring (103) is installed between the top of the arc plate (101) and the top of the vertical plate (102). The docking rod (104) passes through the conical ring (103) and is slidably connected to the vertical plate (102). The threaded ring (105) is installed on the outer wall of the vertical plate (102), and the side wall of the vertical plate (102) is configured with a circular hole (1021) located inside the threaded ring (105); the closing plate (106) is installed at the bottom of the docking rod (104); when the docking rod (104) is not under pressure, the closing plate (106) closes the circular hole (1021); an insertion rod (107) is installed inside the vertical plate (102); the limit spring (108) is sleeved on the outer periphery of the insertion rod (107), and the top of the limit spring (108) is in contact with the closing plate (106); the inner periphery of the closing plate (106) is configured with a cylindrical groove (1061) adapted to the insertion rod (107).

6. The adaptive boost oil pump according to claim 5, characterized in that: The oil inlet pipe assembly (11) comprises an oil inlet branch pipe (111), a rotating plate (112), a conical head (113), a hollow cylinder (114), a cross bar (115), a floating plate (116), a limit cylinder (117) and a support spring (118); the oil inlet branch pipe (111) is screwed to the threaded ring (105); the rotating plate (112) is rotatably mounted on the inner wall of the oil inlet branch pipe (111); the conical head (113) is mounted on the oil inlet branch pipe (111) end, the hollow cylinder (114) is installed at the bottom of the conical head (113), the cross bar (115) is installed at equal intervals on the inner circumference of the hollow cylinder (114), the floating plate (116) is limited and fitted on the top of the hollow cylinder (114), the limiting cylinder (117) is installed at the end of the cross bar (115), the support spring (118) is installed on the inner circumference of the limiting cylinder (117), and the top of the support spring (118) is connected to the floating plate (116).

7. The adaptive boost oil pump according to claim 6, characterized in that: The conical surface of the conical seat (68) is located on the outside, and the conical surface of the conical ring (103) is located on the inside.

8. The adaptive boost oil pump according to claim 7, characterized in that: A guide block (331) is fitted on the inner wall of the communication frame (31), and the guide block (331) is located outside the impeller (332).

9. The adaptive boost oil pump according to claim 8, characterized in that: The cross section of the docking rod (104) in a top view is an isosceles trapezoid, with the shorter side facing the outside of the conical ring (103).

10. The adaptive boost oil pump according to claim 9, characterized in that: The bottom of the conical seat (68) is configured with a docking groove (681), and the docking groove (681) is adapted to the docking rod (104).

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