Oil pump with pressure stabilizing function

Abstract

The utility model discloses an oil pump with a pressure stabilizing function, and relates to the technical field of oil pumps. The device comprises an oil pump body, a suction pipeline is fixedly installed on one side of the oil pump body, the end, away from the oil pump body, of the suction pipeline is fixedly installed and communicates with a suction cavity, an output pipeline is fixedly installed at the other end of the oil pump body, and a funnel opening is fixedly formed in the inner wall of the suction pipeline; and a limiting rod is fixedly mounted on the inner wall of the funnel opening, a control piston is slidably connected to the limiting rod, and an input opening is fixedly formed in one end of the limiting rod. According to the device, the distance between the control piston and the funnel opening is adjusted according to the oil pressure through the cooperation of the control piston and the limiting rod and the arrangement of the limiting groove and the movable block, so that the oil quantity is changed, the uniform and stable moving speed is always kept in the whole process, and the device has certain flexibility and automation; excessive manpower participation is not needed, and waste of manpower cost is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumps, in particular to an oil pump with a pressure stabilizing function. Background Art

[0002] The oil pump is a light and compact pump, which is divided into three categories: in-line, distributed and single-body. The oil pump needs a power source to operate. The camshaft at the bottom is driven by the engine crankshaft gear. The pressure regulating oil pump adjusts the output pressure to ensure that the oil pressure remains stable under given working conditions. This type of oil pump is widely used in many industrial fields, such as hydraulic systems, fuel systems, lubrication systems, etc.

[0003] According to a disclosed high-pressure oil pump with a pressure stabilizing function (publication number: CN113803198A), it includes a main body, the upper end of the main body is fixedly connected to a pipe joint near the middle position, the lower end of the main body is fixedly connected to a pressure regulating valve near the middle position, a fixed plate is sleeved on one side of the main body, one end of the fixed plate is movably connected to a plunger, the other end of the main body is fixedly connected to a connecting pipe, and a fixing mechanism is arranged on the outside of the connecting pipe, and the fixing mechanism includes a cylindrical shell arranged on the outside of the connecting pipe. In the above application, the threaded connection between the fixing knob and the cylindrical shell is used, and the stable structure can promote the stability of the oil pressure and play a stabilizing role, and can avoid the pressure leakage caused by deformation causing the pressure instability in the high-pressure oil pump, thereby ensuring the pressure stabilizing performance of the high-pressure oil pump, but when the oil pressure changes drastically, there are deficiencies in timely adjusting the oil pressure and the oil intake. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an oil pump with a pressure stabilizing function, which solves the problems raised in the above background technology. To achieve the above purpose, the utility model is implemented through the following technical solutions: an oil pump with a pressure stabilizing function, comprising an oil pump body, a suction pipe is fixedly installed on one side of the oil pump body, the suction pipe is fixedly installed at one end away from the oil pump body and is connected with a suction chamber, an output pipe is fixedly installed on the other end of the oil pump body, a funnel is fixedly installed on the inner wall of the suction pipe, a limit rod is fixedly installed on the inner wall of the funnel, a control piston is slidably connected to the limit rod, an input port is fixedly installed on the end of the limit rod away from the funnel, a protective cover is movably sleeved on the outer side of the input port, one end of the input port is connected with the oil supply input port, a sliding column is fixedly installed on one end of the input port close to the oil pump body, the sliding column is slidably inserted on one side of the control piston, a guide groove is provided on the outer side of the control piston, a movable block is fixedly installed inside the guide groove, the guide groove is slidably connected to the bottom side of the limit rod, a limiting groove is provided at the bottom of the limit rod, and the movable block is slidably connected to the inner wall of the limiting groove.

[0005] Preferably, a drainage groove is provided on one side of the control piston close to the input port, and the end of the control piston close to the oil pump body is arranged in a conical structure. The setting of the drainage groove can guide the oil supply to enter the suction chamber through the drainage groove, and then enter the suction pipe through the funnel mouth.

[0006] Preferably, there are four limit rods and they are symmetrically arranged on the inner wall of the funnel mouth. The four limit rods are all located inside the suction chamber, limiting the control piston in four different directions, so that the control piston can only slide along the limit rods.

[0007] Preferably, the size of the movable block corresponds to the limiting groove, the width of the guide groove is greater than the width of the limit rod, a spring is wrapped around the outside of the sliding column and the two ends of the spring are respectively fixed on the control piston and the input port, the movable block fits closely with the guide groove, limiting the sliding speed of the movable block, and the movement speed of the control piston is controlled by the movable block.

[0008] Preferably, the inner wall of the limiting groove is rotatably connected to a force-bearing plate, and an extrusion bag is fixedly installed on one side of the force-bearing plate close to the oil pump body. The top of the extrusion bag is fixed and connected to an air guide tube, and an air bag is glued to one end of the funnel mouth close to the oil pump body, and the other end of the air guide tube is fixed to and connected to the air bag. Because the air bag is located at the very end of the funnel mouth, it plays a good protective role for the funnel mouth, avoiding damage to the funnel mouth caused by excessive oil pressure impacting the funnel mouth. The provision of the air bag can also reduce the oil intake and play a role in regulating the oil pressure.

[0009] Preferably, the airbag is an annular structure, the airbag and the extrusion bag are both made of rubber, one end of the air guide tube is fixedly installed inside the limit rod, and after the oil pressure is restored, the deformation of the extrusion bag is restored, causing the airbag to shrink, thereby preventing normal oil inlet from being affected.

[0010] The utility model provides an oil pump with a pressure stabilizing function. It has the following beneficial effects:

[0011] (1) The device controls the coordination of the piston and the limit rod, and sets the limiting groove and the movable block to adjust the distance between the control piston and the funnel mouth according to the oil pressure, thereby changing the oil volume, and maintaining a uniform and stable moving speed throughout the entire process, so that the device has a certain degree of flexibility and automation, does not require too much manpower participation, and avoids waste of manpower costs.

[0012] (2) The device changes the oil intake amount through the setting of the air bag, which plays a good protective role on the funnel mouth, avoids excessive oil pressure from impacting the funnel mouth and damaging it, and plays a role in regulating the oil pressure. After the oil pressure is restored, the deformation of the extrusion bag is restored, causing the air bag to shrink, avoiding the normal oil intake being affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the entire utility model;

[0014] Figure 2 This is a schematic diagram of the suction chamber and suction pipe of the utility model;

[0015] Figure 3 This is a schematic diagram of the control piston of the utility model;

[0016] Figure 4 This is a schematic diagram of the limit rod of the utility model;

[0017] Figure 5 It is a cross-sectional schematic diagram of the limit rod of the utility model.

[0018] In the figure: 1. oil pump body; 2. suction chamber; 3. suction pipe; 4. discharge pipe; 5. funnel mouth; 6. limit rod; 7. control piston; 8. sliding column; 9. input port; 10. protective cover; 11. limiting groove; 12. guide groove; 13. movable block; 14. drainage groove; 15. air bag; 16. air guide tube; 17. extrusion bag; 18. force plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Embodiment 1

[0021] See also Figure 1-3An oil pump with a pressure stabilizing function comprises an oil pump body 1, a suction pipe 3 is fixedly installed on one side of the oil pump body 1, an end of the suction pipe 3 away from the oil pump body 1 is fixedly installed and connected with a suction chamber 2, an output pipe 4 is fixedly installed on the other end of the oil pump body 1, a funnel mouth 5 is fixedly installed on the inner wall of the suction pipe 3, a limit rod 6 is fixedly installed on the inner wall of the funnel mouth 5, the number of the limit rods 6 is four and they are symmetrically arranged on the inner wall of the funnel mouth 5, the four limit rods 6 are all located inside the suction chamber 2, and limit the control piston 7 in four different directions, so that The control piston 7 can only slide along the limit rod 6, and the limit rod 6 is slidably connected with the control piston 7. A drainage groove 14 is provided on the side of the control piston 7 close to the input port 9. The end of the control piston 7 close to the oil pump body 1 is a conical structure. The setting of the drainage groove 14 can guide the oil supply to enter the suction chamber 2 through the drainage groove 14, and then enter the suction pipe through the funnel mouth 5. The end of the limit rod 6 away from the funnel mouth 5 is fixedly installed with the input port 9, and the outer side of the input port 9 is movably sleeved with a protective cover 10. One end of the input port 9 is connected to the oil supply input end, and the input port 9 is close to the oil. A sliding column 8 is fixedly installed at one end of the pump body 1, and the sliding column 8 is slidably inserted on one side of the control piston 7. A guide groove 12 is opened on the outside of the control piston 7, and a movable block 13 is fixedly installed inside the guide groove 12. The size of the movable block 13 corresponds to the limit groove 11, and the width of the guide groove 12 is greater than the width of the limit rod 6. A spring is wound around the outside of the sliding column 8 and the two ends of the spring are respectively fixed on the control piston 7 and the input port 9. The movable block 13 fits closely with the guide groove 12, which limits the sliding speed of the movable block 13, and the control piston is controlled by the movable block 13. 7, the guide groove 12 is slidably connected to the bottom side of the limit rod 6, a limit groove 11 is provided at the bottom of the limit rod 6, and the movable block 13 is slidably connected to the inner wall of the limit groove 11. The device adjusts the distance between the control piston 7 and the funnel mouth 5 according to the oil pressure through the setting of the limit groove 11 and the movable block 13, thereby changing the oil volume, and maintaining a uniform and stable moving speed throughout the whole process, so that the device has certain flexibility and automation, does not require too much manpower participation, and avoids waste of manpower costs.

[0022] When in use, the input end is connected with the input port 9, so that the oil supply enters the suction chamber 2 through the input port 9. When the oil pressure of the oil supply is not large, the oil supply will first rush to one end of the control piston 7. Under the pressure of the oil supply, the control piston 7 is displaced close to the oil pump body 1, and the control piston 7 slides on the sliding column 8. Because of the existence of the limit rod 6, the guide groove 12 opened on the side of the control piston 7 contacts the bottom side of the limit rod 6. At the same time, the movable block 13 fixedly installed inside the guide groove 12 slides inside the limiting groove 11. Because the oil pressure is not large, the spring connecting the sliding column 8 and the control piston 6 will not be greatly deformed. At this time, the oil supply flows to the surroundings through the drainage groove 14 opened on the side of the control piston 7, and the oil supply enters the funnel mouth 5 through the suction chamber 2, thereby supplying oil to the oil pump body 1. Once the oil pressure is too large, the oil supply will generate a large pressure on the control piston 7. The pressure is greater than the spring elastic force of the control piston 7 and the sliding column 8, causing the spring to be larger. The control piston 7 is greatly deformed, and the control piston 7 is pushed by the pressure to move closer to the side of the oil pump body 1, causing the control piston 7 to slide toward one end of the limit rod 6, and the distance between the control piston 7 and the funnel mouth 5 is shortened. The control piston 7 blocks the oil supply channel, which reduces the amount of oil obtained by the funnel mouth 5, thereby reducing the oil pressure in the suction pipe 3 of the oil pump body 1. The sliding of the control piston 7 drives the movable block 13 to move closer to the oil pump body 1. Under the influence of the friction force on both sides of the inner wall of the limiting groove 11, the movable block 13 will not move rapidly. After the oil pressure is reduced, the elastic force of the spring drives the control piston 7 to reset. The device adjusts the distance between the control piston 7 and the funnel mouth 5 according to the level of the oil pressure through the cooperation of the control piston 7 and the limit rod 6, and through the setting of the limiting groove 11 and the movable block 13, thereby changing the oil amount, and maintaining a uniform and stable moving speed throughout the process, so that the device has a certain flexibility and automation, does not require too much manpower participation, and avoids waste of manpower costs.

[0023] Embodiment 2

[0024] See also Figure 4-5On the basis of the first embodiment, the inner wall of the limiting groove 11 is rotatably connected with a force-bearing plate 18, and a squeeze bag 17 is fixedly installed on the side of the force-bearing plate 18 close to the oil pump body 1, and the top of the squeeze bag 17 is fixed and connected with an air guide tube 16, and an air bag 15 is glued to one end of the funnel mouth 5 close to the oil pump body 1, and the other end of the air guide tube 16 is fixed and connected with the air bag 15. Because the air bag 15 is located at the very end of the funnel mouth 5, it plays a good protective role on the funnel mouth 5, avoiding excessive oil pressure from impacting the funnel mouth 5 and damaging it. The setting of the air bag 15 can also reduce the amount of oil inlet, which plays a role in regulating the oil pressure. The air bag 15 5 is an annular structure, the airbag 15 and the squeeze bag 17 are both made of rubber, one end of the air guide tube 16 is fixedly installed inside the limit rod 6, after the oil pressure is restored, the deformation of the squeeze bag 17 is restored, so that the airbag 15 is reduced to avoid the normal oil inlet being affected, the airbag 15 is located at the very end of the funnel mouth 5, which plays a good protective role on the funnel mouth 5, and avoids excessive oil pressure from impacting the funnel mouth 5 and damaging it. The setting of the airbag 15 can also reduce the oil inlet amount and play a role in regulating the oil pressure. After the oil pressure is restored, the deformation of the squeeze bag 17 is restored, so that the airbag 15 is reduced to avoid the normal oil inlet being affected.

[0025] During use, on the basis of Example 1, when the oil pressure is too high, the control piston 7 approaches the direction of the oil pump body 1, driving the movable block 13 to approach one end of the limiting groove 11. In this process, the movable block 13 first contacts one side of the force-bearing plate 18. The force-bearing plate 18 rotates under the driving force of the movable block 13, and the other side of the force-bearing plate 18 begins to squeeze the extrusion bag 17, causing the extrusion bag 17 to deform, and the gas inside the extrusion bag 17 is transmitted to the air bag 15 through the air guide tube 16, and the air bag 15 expands. Because the air bag 15 is located at the very end of the funnel mouth 5, it plays a good protective role for the funnel mouth 5, avoiding excessive oil pressure from impacting the funnel mouth 5 and damaging it. The setting of the air bag 15 can also reduce the oil intake and play a role in regulating the oil pressure. After the oil pressure is restored, the deformation of the extrusion bag 17 is restored, causing the air bag 15 to shrink, avoiding the normal oil intake being affected.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oil pump with a pressure stabilizing function, comprising an oil pump body (1), characterized in that: A suction pipe (3) is fixedly mounted on one side of the oil pump body (1); an end of the suction pipe (3) away from the oil pump body (1) is fixedly mounted and connected to a suction chamber (2); an output pipe (4) is fixedly mounted on the other end of the oil pump body (1); a funnel opening (5) is fixedly mounted on the inner wall of the suction pipe (3); a limiting rod (6) is fixedly mounted on the inner wall of the funnel opening (5); the limiting rod (6) is slidably connected to a control piston (7); an input port (9) is fixedly mounted on the end of the limiting rod (6) away from the funnel opening (5); an outer movable sleeve of the input port (9) is provided. A protective cover (10) is connected, one end of the input port (9) is connected to the oil supply input end, a sliding column (8) is fixedly installed at one end of the input port (9) close to the oil pump body (1), the sliding column (8) is slidably inserted into one side of the control piston (7), a guide groove (12) is provided on the outer side of the control piston (7), a movable block (13) is fixedly installed inside the guide groove (12), the guide groove (12) is slidably connected to the bottom side of the limit rod (6), a limit groove (11) is provided at the bottom of the limit rod (6), and the movable block (13) is slidably connected to the inner wall of the limit groove (11).

2. The oil pump with pressure stabilizing function according to claim 1, characterized in that: A drainage groove (14) is provided on one side of the control piston (7) close to the input port (9), and one end of the control piston (7) close to the oil pump body (1) is arranged in a conical structure.

3. The oil pump with pressure stabilizing function according to claim 2, characterized in that: The number of the limiting rods (6) is four and they are symmetrically arranged on the inner wall of the funnel mouth (5), and the four limiting rods (6) are all located inside the suction chamber (2).

4. The oil pump with pressure stabilizing function according to claim 3, characterized in that: The size of the movable block (13) corresponds to the limiting groove (11), the width of the guide groove (12) is greater than the width of the limiting rod (6), and a spring is wound around the outside of the sliding column (8), and the two ends of the spring are respectively fixed on the control piston (7) and the input port (9).

5. The oil pump with pressure stabilizing function according to claim 4, characterized in that: The inner wall of the limiting groove (11) is rotatably connected to a force-bearing plate (18); a squeeze bag (17) is fixedly installed on one side of the force-bearing plate (18) close to the oil pump body (1); the top of the squeeze bag (17) is fixed and connected to an air guide tube (16); an air bag (15) is glued to one end of the funnel mouth (5) close to the oil pump body (1); and the other end of the air guide tube (16) is fixed to and connected to the air bag (15).

6. The oil pump with pressure stabilizing function according to claim 5, characterized in that: The airbag (15) is an annular structure. The airbag (15) and the squeezing bag (17) are both made of rubber. One end of the air guide tube (16) is fixedly installed inside the limiting rod (6).

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