A piston-type oil pump with filtration function

Abstract

This invention discloses a piston-type oil pump with a filtration function, relating to the field of oil pump technology. It includes a pump body, a control component, a filter component, and a cleaning mechanism. An inlet pipe and an outlet pipe are respectively connected to both sides of the pump body. Check valves are installed at the connections of the inlet and outlet pipes to the pump body to control the flow direction of the oil. This invention, by incorporating a filter component, enables the oil pump to have a filtration function while adapting to the size differences of different inlet and outlet pipes. The control component allows for the free assembly and disassembly of the filter component, and the switching between filtration and cleaning functions can be achieved by controlling the assembly and disassembly. The cleaning mechanism automatically scrapes and cleans the filter screen after the filter component is disassembled.

Description

Technical Field

[0001] This invention relates to the field of oil pump technology, specifically to a piston-type oil pump with a filtration function. Background Technology

[0002] Piston fuel pumps are key components in fuel systems, primarily used to transfer fuel from the fuel tank to the injectors. Their structure mainly consists of a piston assembly, an inlet valve assembly, an outlet valve assembly, and a pump body. Piston fuel pumps with filtration functions effectively remove impurities from liquids by adding a filtration mechanism to the traditional piston fuel pump, thereby improving the quality of the transferred liquid and extending the service life of the equipment.

[0003] A search revealed Chinese patent CN118481980B, which describes an oil pump body with an inlet pipe fixedly connected to the rear side and an outlet pipe fixedly connected to the front side. A filter mechanism is installed around the outlet pipe, with a cleaning mechanism inside and a collection mechanism at the bottom. A connecting pipe surrounds the filter mechanism. The filter mechanism includes a filter assembly and a fixing assembly. The filter assembly is located in front of the outlet pipe. In use, the filter mechanism filters impurities in the oil during oil or other liquid transportation via a filter disc inside the filter pipe, improving oil efficiency and extending equipment lifespan. It also allows for automatic connection and fixing between the filter pipe and the outlet pipe, improving installation and disassembly efficiency. The filter disc can be replaced after prolonged use.

[0004] However, the above solution places all the filtration functions on the oil outlet side and does not set up a coarse filtration function on the oil inlet side. As a result, when filtering the liquid, impurities will remain in the pump body for a long time, and some impurities may not adhere to the filter screen. With the turbulence effect of the piston pump, they will repeatedly enter the pump body, which can easily affect the service life of the pump body. At the same time, the connection between the filter tube and the oil outlet tube in the above solution is fixed. Both the filter tube and the oil outlet tube are fixed in size and cannot be freely adjusted. Therefore, when changing the size of the oil outlet tube, the filter tube must be replaced at the same time. Summary of the Invention

[0005] The purpose of this invention is to provide a piston-type oil pump with a filtration function, which has the advantages of adaptive adjustment and filtration cleaning, and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a piston-type oil pump with a filtration function, comprising a pump body, a control component, a filtration component, and a cleaning mechanism, wherein an oil inlet pipe and an oil outlet pipe are respectively connected to both sides of the pump body, and a check valve for controlling the flow direction of the oil is provided at the connection between the oil inlet pipe and the oil outlet pipe and the pump body. The control component includes an adjustment mechanism for switching modes and a telescopic mechanism for assembling and disassembling the filter component. The adjustment mechanism includes a fixed base located on one side of the pump body. The telescopic mechanism is connected to the adjustment mechanism in a transmission manner. The filter assembly includes a sleeve that assists in the inlet and outlet of oil and a worm gear that controls assembly and disassembly. The sleeve is fixedly connected to the telescopic mechanism.

[0007] Preferably, the fixed base has two cavities, one from top to bottom, and a positioning groove is provided on the middle section of the top of the fixed base away from the pump body. The positioning groove communicates with the first cavity. A positioning ring is slidably connected to the middle section of the first cavity. A handle is fixedly connected to the outer contour of the positioning ring. The handle is slidably connected in the positioning groove. Both ends of the positioning groove are provided with locking pins for positioning the handle. The locking pins are connected to the fixed base for damping rotation via pin shafts.

[0008] Preferably, a limiting groove is provided in the middle section of the inner contour of the positioning ring, and guide grooves are provided on both sides of the inner contour of the positioning ring. Both ends of the cavity are slidably connected with auxiliary rings, and the end face structure of the auxiliary rings is consistent with that of the positioning ring.

[0009] Preferably, the telescopic mechanism includes a drive shaft driven by a built-in motor and disposed within a cavity. A limiting ring is fixedly connected to the middle section of the drive shaft. The limiting ring is rotatably connected to a limiting groove. Threaded portions are fixedly connected to the outer contours of the drive shaft on both sides of the limiting ring, with the threads of the two threaded portions facing opposite directions. Screw cylinders are sleeved on the outer contours of the drive shaft on both sides of the limiting ring. Both screw cylinders are threadedly connected to the drive shaft through corresponding threaded portions. Guide rods are fixedly connected to both sides of the outer contours of the two screw cylinders, and multiple guide rods are slidably connected to corresponding guide grooves.

[0010] Preferably, there are two sleeves located on the sides of both ends of the drive shaft. A silicone sleeve is fixedly connected to the end of the inner contour of each sleeve near the pump body. A conical filter screen is fixedly connected to the middle section of the inner contour of each sleeve. A connecting block is fixedly connected to one side of the outer contour of each sleeve. Both sleeves are fixedly connected to the corresponding lead screw cylinder through the connecting block. A fixing ring is fixedly connected to the end of the outer contour of each sleeve near the pump body. An upwardly extending bracket is fixedly connected to the top of the end of the outer contour of each sleeve near the fixing ring.

[0011] Preferably, there are two worm gears, each located in the middle of a corresponding bracket. An adjusting shaft extending to both sides is fixedly connected through the axis of each worm gear. Both adjusting shafts are rotatably connected to the corresponding bracket. A double-sided gear ring is meshed and driven at the bottom end of each worm gear. Both double-sided gear rings are rotatably connected to the end of a corresponding fixed ring near the pump body. Multiple spur gears are meshed and driven on the inner contours of both double-sided gear rings. These multiple spur gears are rotatably connected to the inner contour of the sleeve near the pump body via pins. A spur rack is meshed and driven on the outer contour of each spur gear. Each spur rack is slidably connected through and to the corresponding fixed ring. A locking plate is fixedly connected to the end of each spur rack away from the fixed ring.

[0012] Preferably, the two conical filters are arranged in opposite directions and are respectively directed from the pump body to the oil inlet pipe and the oil outlet pipe, and the multiple locking plates are assembled together to form a ring structure.

[0013] Preferably, the cleaning mechanism includes a dual-axis motor disposed in the middle section of the cavity. Both ends of the dual-axis motor are provided with output shafts. The ends of the two output shafts away from the dual-axis motor are fixedly connected to sponge pads. Sensors are sleeved on the outer contours of the bottom of the two sponge pads. The ends of the two sensors away from the sponge pads are fixedly connected to compression springs. The ends of the two compression springs away from the sensors are fixedly connected to the outer contours on both sides of the fixed base.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting up a filter component, the present invention enables the oil pump to have a filtering function while adapting to the size differences of different inlet and outlet oil pipes of the oil pump, thus avoiding the situation where the filtering function is mismatched due to the replacement of inlet and outlet oil pipes, resulting in filtering failure.

[0015] 2. This invention enables the free assembly and disassembly of the filter component by setting up a control component, and the switching between filtration and cleaning functions can be achieved by controlling the assembly and disassembly of the filter component.

[0016] 3. The present invention features a cleaning mechanism that automatically scrapes and cleans the filter screen after the filter assembly is disassembled. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a cross-sectional view of the main structure of the present invention; Figure 3 This is a schematic diagram of the pump body structure of the present invention; Figure 4 This is a schematic diagram of the connection relationship of the control components of the present invention; Figure 5 This is an exploded view of the adjustment mechanism of the present invention; Figure 6 This is an exploded view of the telescopic mechanism of the present invention; Figure 7 This is a schematic diagram of the filter component of the present invention; Figure 8 This is an exploded view of the filter component of the present invention; Figure 9 This is a schematic diagram of the cleaning mechanism of the present invention.

[0018] In the diagram: 1. Pump body; 11. Inlet pipe; 12. Outlet pipe; 13. Check valve; 2. Fixed seat; 21. Cavity 1; 22. Cavity 2; 23. Positioning groove; 24. Positioning ring; 25. Limiting groove; 26. Guide groove; 27. Auxiliary ring; 28. Engaging pin; 29. ​​Handle; 3. Drive shaft; 31. Limiting ring; 32. Threaded part; 33. Screw cylinder; 34. Guide rod; 4. Sleeve; 41. Silicone sleeve; 42. Conical filter screen; 43. Connecting block; 44. Fixed ring; 45. Bracket; 5. Worm gear; 51. Adjusting shaft; 52. Double-sided gear ring; 53. Spur gear; 54. Spur rack; 55. Engaging plate; 6. Dual-shaft motor; 61. Output shaft; 62. Sponge pad; 63. Sensor; 64. Compression spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1:

[0021] Please see Figures 1 to 9 The present invention provides a technical solution: a piston oil pump with a filtration function, including a pump body 1, and also including a control component, a filtration component and a cleaning mechanism. An oil inlet pipe 11 and an oil outlet pipe 12 are respectively connected to both sides of the pump body 1. A check valve 13 for controlling the flow direction of the oil is provided at the connection between the oil inlet pipe 11 and the oil outlet pipe 12 and the pump body 1. The control component includes an adjustment mechanism for switching modes and a telescopic mechanism for assembling and disassembling the filter component. The adjustment mechanism includes a fixed base 2 located on one side of the pump body 1. The telescopic mechanism is connected to the adjustment mechanism in a transmission manner. The filter assembly includes a sleeve 4 for assisting in the inlet and outlet of oil and a worm gear 5 for controlling assembly and disassembly. The sleeve 4 is fixedly connected to the telescopic mechanism.

[0022] In this design, the oil enters through the inlet pipe 11 and is pumped out through the outlet pipe 12 by the pump body 1. Its working principle is the same as that of a conventional piston diaphragm pump. The backflow of oil is suppressed by the intermittent opening and closing of the check valve 13. When the oil passes through the inlet pipe 11 and the outlet pipe 12, the oil is filtered by the filter assembly. On the inlet side, i.e., at the inlet pipe 11, the oil is coarsely filtered to effectively intercept large particles of impurities in the oil to ensure the working life of the pump body 1. On the outlet side, i.e. at the outlet pipe 12, the oil is finely filtered to filter out fine impurities and further ensure the pumped quality of the oil.

[0023] It should be noted that the oil suction stroke of pump body 1 depends on negative pressure. Direct fine filtration at the oil inlet pipe 11 can easily lead to excessive oil flow resistance, thereby affecting the performance of pump body 1. Therefore, staged filtration is performed at the oil inlet pipe 11 and the oil outlet pipe 12.

[0024] On the other hand, during the operation of the piston pump, there may be situations where different sizes of the inlet pipe 11 and outlet pipe 12 need to be replaced due to the needs of the scenario. At this time, it is necessary to operate the control component to disassemble the filter component. During the disassembly and assembly of the filter component, the cleaning mechanism works simultaneously to complete the scraping and cleaning operation of the filter component. After the inlet pipe 11 and outlet pipe 12 are replaced, the filter component is installed and adjusted to make it engage with the inlet pipe 11 and outlet pipe 12. Through the adjustable design of the engagement degree of the filter component, it can be adapted to different sizes of inlet pipe 11 and outlet pipe 12, thereby effectively expanding the application scenarios of the solution.

[0025] Example 2:

[0026] Please see Figures 4 to 6 This embodiment further illustrates the following based on Embodiment 1: The interior of the fixed base 2 is provided with a cavity 21 and a cavity 22 from top to bottom. A positioning groove 23 is provided on the side of the top middle section of the fixed base 2 away from the pump body 1. The positioning groove 23 communicates with the cavity 21. A positioning ring 24 is slidably connected to the middle section of the cavity 21. A handle 29 is fixedly connected to the outer contour of the positioning ring 24. The handle 29 is slidably connected in the positioning groove 23. Both ends of the positioning groove 23 are provided with locking pins 28 for positioning the handle 29. The locking pins 28 are connected to the fixed base 2 for damping rotation via pin shafts.

[0027] A limiting groove 25 is provided in the middle section of the inner contour of the positioning ring 24, and guide grooves 26 are provided on both sides of the inner contour of the positioning ring 24. An auxiliary ring 27 is slidably connected to both ends of the cavity 21, and the auxiliary ring 27 has the same end face structure as the positioning ring 24.

[0028] The telescopic mechanism includes a drive shaft 3 driven by a built-in motor and disposed in cavity 21. A limiting ring 31 is fixedly connected to the middle section of the drive shaft 3. The limiting ring 31 is rotatably connected to a limiting groove 25. Threaded portions 32 are fixedly connected to the outer contours of the drive shaft 3 on both sides of the limiting ring 31. The threads of the two threaded portions 32 face opposite directions. Screw cylinders 33 are sleeved on the outer contours of the drive shaft 3 on both sides of the limiting ring 31. The two screw cylinders 33 are threadedly connected to the drive shaft 3 through the threaded portions 32 at corresponding positions. Guide rods 34 are fixedly connected to both sides of the outer contours of the two screw cylinders 33. Multiple guide rods 34 are slidably connected to guide grooves 26 at corresponding positions.

[0029] As can be seen from Example 1, the control component completes the switching between the working mode and the cleaning mode of the filter component. Figure 1 The image shows the state of the filter assembly in its working mode, at which time the filter assembly is engaged with the oil inlet pipe 11 and the oil outlet pipe 12.

[0030] When the filter assembly needs to be disassembled, first adjust the filter assembly to release the engagement between the oil inlet pipe 11 and the oil outlet pipe 12. Then, control the built-in motor of the drive shaft 3 to start and drive the drive shaft 3 to rotate. Since the threaded part 32 is fixedly connected to the outer contour of the drive shaft 3, the threaded part 32 rotates synchronously with the drive shaft 3. The lead screw cylinder 33 is fixedly connected to the guide rod 34, and the guide rod 34 is limited and slidably connected inside the guide groove 26. The handle 29 is kept fixed by the damping friction limit of the locking pin 28. That is, the handle 29 and the positioning ring 24 are both fixed by the frictional resistance between the locking pin 28 and the fixed seat 2, which further prevents the guide rod 34 and the lead screw cylinder 33 from rotating. At this time, the rotation of the threaded part 32, under the action of its screw connection with the lead screw cylinder 33, causes the lead screw cylinder 33 and the guide rod 34 to slowly extend.

[0031] Since the filter assembly is fixedly connected to the lead screw drum 33, the lead screw drum 33 will drive the filter assembly to slowly extend outward, thereby releasing the filter assembly from the oil inlet pipe 11 and the oil outlet pipe 12. Therefore, the filter assembly can be easily disassembled so that personnel can replace the oil inlet pipe 11 and the oil outlet pipe 12.

[0032] Furthermore, when the drive shaft 3 rotates, causing the lead screw 33 and guide rod 34 to extend to their limit positions, the lead screw 33 and guide rod 34 cannot extend further, resulting in the drive shaft 3 being obstructed from rotating. At this time, the built-in motor is controlled to stop driving the drive shaft 3. Then, the handle 29 is manually pushed upward along the positioning groove 23. During this process, the force of manually pushing the handle 29 needs to overcome the frictional resistance between the locking pin 28 and the fixed seat 2, so that the handle 29 moves along the positioning groove 23 and drives the positioning ring 24 to rotate. Since the opening arc of the positioning groove 23 is ninety degrees, the maximum rotation angle of the positioning ring 24 and the handle 29 is also ninety degrees. After the positioning ring 24 rotates ninety degrees, the handle 29 is damped and locked again by the locking pin 28 on the other side, so that the positioning ring 24 remains stationary after rotation.

[0033] Simultaneously, the positioning ring 24 further drives the guide rod 34 and the lead screw drum 33 to rotate synchronously through the guide groove 26. At this time, the filter assembly rotates 90 degrees with the lead screw drum 33, so that the filter assembly corresponds to the position of the cleaning mechanism. Then, the built-in motor is controlled to drive the drive shaft 3 to reverse, and the lead screw drum 33 and the guide rod 34 further drive the filter assembly to retract as a whole until the lead screw drum 33 and the guide rod 34 retract to the limit position. At this time, the filter assembly is in contact with the cleaning mechanism, and the cleaning mechanism automatically starts and completes the scraping and cleaning operation of the filter assembly.

[0034] Furthermore, after the oil inlet pipe 11 and oil outlet pipe 12 are replaced, the screw cylinder 33 and guide rod 34 are controlled again to drive the filter assembly to extend to the limit position. Then, the handle 29 is turned in the opposite direction to complete the reset. At this time, the filter assembly is aligned with the positions of the oil inlet pipe 11 and oil outlet pipe 12 again. Then, the screw cylinder 33 and guide rod 34 are controlled to drive the filter assembly to retract and adjust the degree of engagement between the filter assembly and the oil inlet pipe 11 and oil outlet pipe 12 to realize the installation process of the filter assembly.

[0035] It should be noted that while the drive shaft 3 rotates, the limiting ring 31 rotates synchronously under its fixed connection with the drive shaft 3. Since the handle 29 is limited to sliding inside the positioning groove 23, the fixed seat 2 is in a fixed state, that is, the handle 29 cannot move in the horizontal direction. Furthermore, neither the positioning ring 24 nor the limiting groove 25 can move in the horizontal direction because the limiting ring 31 is limited to sliding inside the limiting groove 25. Therefore, the drive shaft 3 and the limiting ring 31 also cannot move in the horizontal direction, thereby preventing the drive shaft 3 from coming off from both sides of the fixed seat 2 while rotating, and further ensuring the disassembly and assembly effect of the solution.

[0036] Example 3:

[0037] Please see Figure 7 and Figure 8This embodiment further illustrates the following based on Embodiment 2: Two sleeves 4 are provided and are located on the sides of both ends of the drive shaft 3. A silicone sleeve 41 is fixedly connected to the end of the inner contour of each sleeve 4 near the pump body 1. A conical filter screen 42 is fixedly connected to the middle section of the inner contour of each sleeve 4. A connecting block 43 is fixedly connected to one side of the outer contour of each sleeve 4. Both sleeves 4 are fixedly connected to the corresponding lead screw cylinder 33 through the connecting block 43. A fixing ring 44 is fixedly connected to the end of the outer contour of each sleeve 4 near the pump body 1. An upwardly extending bracket 45 is fixedly connected to the top of the end of the outer contour of each sleeve 4 near the fixing ring 44.

[0038] Two worm gears 5 are provided and are respectively located in the middle of the corresponding brackets 45. The two worm gears 5 are fixedly connected to the axis of each worm gear 5, and the two adjusting shafts 51 are fixedly connected to the corresponding brackets 45. The bottom ends of the two worm gears 5 are meshed with double-sided gear rings 52. The two double-sided gear rings 52 are fixedly connected to the end of the corresponding fixed ring 44 near the pump body 1. Multiple spur gears 53 are meshed on the inner contour of the two double-sided gear rings 52. The multiple spur gears 53 are fixedly connected to the inner contour of the sleeve 4 near the pump body 1 by pins. Each spur gear 53 is meshed on the outer contour of each spur gear 53. Each spur gear 54 is slidably connected to the corresponding fixed ring 44. The end of each spur gear 54 away from the fixed ring 44 is fixedly connected to a locking plate 55.

[0039] The two conical filters 42 are arranged in opposite directions and are respectively directed from the pump body 1 to the oil inlet pipe 11 and the oil outlet pipe 12. The multiple locking plates 55 are assembled together to form a ring structure.

[0040] As can be seen from Embodiment 2, during the process of the filter assembly being disengaged from the outer contour of the oil inlet pipe 11 and the oil outlet pipe 12, it is necessary to adjust the degree of engagement between the filter assembly and the oil inlet pipe 11 and the oil outlet pipe 12. At this time, the adjustment shaft 51 is manually rotated. Since the adjustment shaft 51 is fixedly connected to the worm 5, the worm 5 rotates synchronously and further drives the double-sided gear ring 52 to rotate. The double-sided gear ring 52 further drives the spur gear 53 to rotate. Since the spur gear 53 is fixedly connected to the inner contour of the sleeve 4 near the pump body 1, and the spur rack 54 is limited by the fixing ring 44, it can only achieve telescopic sliding. That is, the spur gear 53 rotates synchronously under the meshing action of the double-sided gear ring 52 and drives the spur rack 54 to begin telescopic movement.

[0041] by Figure 8For example, when the adjusting shaft 51 is rotated clockwise, the worm gear 5 drives the double-sided gear ring 52 to rotate clockwise synchronously. At this time, the spur gear 53 rotates clockwise synchronously and drives the spur rack 54 to extend outward. When the adjusting shaft 51 is rotated counterclockwise, the worm gear 5 drives the double-sided gear ring 52 to rotate counterclockwise synchronously. At this time, the spur gear 53 rotates counterclockwise synchronously and drives the spur rack 54 to retract inward. Since the spur rack 54 is fixedly connected to the locking plate 55, the movement trajectories of the locking plate 55 and the spur rack 54 are the same, both being extension and retraction movements pointing towards the axis of the fixed ring 44.

[0042] Furthermore, when the locking plate 55 expands outward, it releases its engagement with the oil inlet pipe 11 and the oil outlet pipe 12. At this time, the filter assembly can be smoothly disengaged along with the extension of the screw cylinder 33 and the guide rod 34. When the locking plate 55 extends inward, it re-engages with the oil inlet pipe 11 and the oil outlet pipe 12, thereby completing the installation of the filter assembly. By controlling the extension and retraction of the locking plate 55, the filter assembly can be adapted to oil inlet pipes 11 and oil outlet pipes 12 of different sizes. Due to the self-locking characteristic between the worm gear 5 and the double-sided gear ring 52, the double-sided gear ring 52 and the spur gear 53 will not rotate unexpectedly during the operation of the filter assembly. That is, the spur rack 54 and the locking plate 55 always remain fixed, thereby ensuring the continuous engagement connection between the filter assembly and the oil inlet pipe 11 and the oil outlet pipe 12 and preventing the filter assembly from becoming loose unexpectedly.

[0043] On the other hand, during the operation of the filter assembly, when the oil enters the pump body 1 from the oil inlet pipe 11, it is coarsely filtered by the conical filter screen 42 at the position of the oil inlet pipe 11. At this time, large particulate impurities in the oil are intercepted and collected inside the conical filter screen 42 at the position of the oil inlet pipe 11. Then, the oil is pumped out from the oil outlet pipe 12 under the action of the pump body 1. During this process, fine filtration is achieved by the conical filter screen 42 at the position of the oil outlet pipe 12. Fine impurities in the oil are intercepted and collected to ensure the pumping quality of the oil. In particular, the gap between the outer wall of the oil inlet pipe 11 and the oil outlet pipe 12 and the inner wall of the sleeve 4 is filled by the silicone sleeve 41 to further prevent oil backflow.

[0044] Example 4:

[0045] Please see Figure 9 This embodiment further illustrates the cleaning mechanism based on embodiment three: the cleaning mechanism includes a dual-axis motor 6 disposed in the middle section of cavity two 22. Both ends of the dual-axis motor 6 are provided with output shafts 61. The ends of the two output shafts 61 away from the dual-axis motor 6 are fixedly connected to sponge pads 62. Sensors 63 are sleeved on the outer contours of the bottom of the two sponge pads 62. The ends of the two sensors 63 away from the sponge pads 62 are fixedly connected to compression springs 64. The ends of the two compression springs 64 away from the sensors 63 are fixedly connected to the outer contours on both sides of the fixed base 2.

[0046] As can be seen from Examples 1 and 3, during the disassembly of the filter assembly, when the lead screw 33 and guide rod 34 retract to their limit positions, the cleaning mechanism automatically opens. At this time, the inner contour of the conical filter 42 contacts the outer wall of the sponge pad 62 and squeezes the sensor 63. The compression spring 64 deforms under the compression of the conical filter 42 on the sensor 63. The sensor 63 detects the pressure value and controls the dual-axis motor 6 to open after reaching the trigger threshold. The dual-axis motor 6 further drives the output shaft 61 and the sponge pad 62 to rotate. The rotation of the sponge pad 62 realizes the scraping and cleaning operation of the inner contour of the conical filter 42.

[0047] Furthermore, when the lead screw cylinder 33 and guide rod 34 extend, the conical filter screen 42 disengages from the sponge pad 62 and sensor 63. The sensor 63 is reset under the rebound action of the compression spring 64. At this time, the sensor 63 does not detect the pressure value, thus controlling the dual-axis motor 6 to stop. The output shaft 61 and the sponge pad 62 stop rotating synchronously, thereby realizing the automatic start and stop of the cleaning mechanism.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A piston-type oil pump with filtration function, comprising a pump body (1), characterized in that: It also includes control components, filter components and cleaning mechanisms. The pump body (1) has an oil inlet pipe (11) and an oil outlet pipe (12) respectively passing through both sides. Check valves (13) for controlling the flow direction of oil are provided at the connection points of the oil inlet pipe (11) and the oil outlet pipe (12) with the pump body (1). The control component includes an adjustment mechanism for switching modes and a telescopic mechanism for disassembling and assembling the filter component. The adjustment mechanism includes a fixed base (2) located on one side of the pump body (1). The telescopic mechanism is connected to the adjustment mechanism in a transmission manner. The filter assembly includes a sleeve (4) for assisting in the inlet and outlet of oil and a worm gear (5) for controlling disassembly and assembly. The sleeve (4) is fixedly connected to the telescopic mechanism. The telescopic mechanism includes a drive shaft (3) driven by a built-in motor and disposed in cavity 1 (21). A limiting ring (31) is fixedly connected to the middle section of the drive shaft (3). The limiting ring (31) is rotatably connected to the limiting groove (25). Threaded parts (32) are fixedly connected to the outer contours of the drive shaft (3) on both sides of the limiting ring (31). The threads of the two threaded parts (32) face opposite directions. Screw cylinders (33) are sleeved on the outer contours of the drive shaft (3) on both sides of the limiting ring (31). The two screw cylinders (33) are threaded to the drive shaft (3) through the threaded parts (32) at corresponding positions. Guide rods (34) are fixedly connected to both sides of the outer contours of the two screw cylinders (33). Multiple guide rods (34) are slidably connected to the guide grooves (26) at corresponding positions. The cleaning mechanism includes a dual-axis motor (6) located in the middle section of cavity two (22). Both ends of the dual-axis motor (6) are provided with output shafts (61). The ends of the two output shafts (61) away from the dual-axis motor (6) are fixedly connected to sponge pads (62). Sensors (63) are sleeved on the outer contours of the bottom of the two sponge pads (62). The ends of the two sensors (63) away from the sponge pads (62) are fixedly connected to compression springs (64). The ends of the two compression springs (64) away from the sensors (63) are fixedly connected to the outer contours on both sides of the fixed base (2).

2. A piston-type oil pump with filtration function according to claim 1, characterized in that: The fixed base (2) has a cavity 1 (21) and a cavity 2 (22) arranged from top to bottom. A positioning groove (23) is provided on the side of the top middle section of the fixed base (2) away from the pump body (1). The positioning groove (23) is connected to the cavity 1 (21). A positioning ring (24) is slidably connected in the middle section of the cavity 1 (21). A handle (29) is fixedly connected on the outer contour of the positioning ring (24). The handle (29) is slidably connected in the positioning groove (23). Both ends of the positioning groove (23) are provided with locking pins (28) for positioning the handle (29). The locking pins (28) are connected to the fixed base (2) through a pin shaft for damping rotation.

3. A piston-type oil pump with filtration function according to claim 2, characterized in that: A limiting groove (25) is provided in the middle section of the inner contour of the positioning ring (24), and guide grooves (26) are provided on both sides of the inner contour of the positioning ring (24). An auxiliary ring (27) is provided at both ends of the cavity (21) for limiting sliding connection. The auxiliary ring (27) has the same end face structure as the positioning ring (24).

4. A piston-type oil pump with filtration function according to claim 1, characterized in that: The sleeve (4) is provided in two parts and is located on the sides of both ends of the drive shaft (3). The inner contour of the two sleeves (4) is fixedly connected to the end of the pump body (1) with a silicone sleeve (41). The middle section of the inner contour of the two sleeves (4) is fixedly connected to a conical filter screen (42). The outer contour of the two sleeves (4) is fixedly connected to one side with a connecting block (43). The two sleeves (4) are fixedly connected to the corresponding screw cylinder (33) through the connecting block (43). The outer contour of the two sleeves (4) is fixedly connected to the end of the pump body (1) with a fixing ring (44). The top of the outer contour of the two sleeves (4) is fixedly connected to an upwardly extending bracket (45).

5. A piston-type oil pump with filtration function according to claim 1, characterized in that: Two worm gears (5) are provided and are respectively located in the middle of the corresponding brackets (45). An adjusting shaft (51) extending to both sides is fixedly connected through the axis of each worm gear (5). Both adjusting shafts (51) are connected to the corresponding brackets (45) for rotatable positioning. The bottom ends of both worm gears (5) are meshed with double-sided gear rings (52). Both double-sided gear rings (52) are rotatably connected to the end of the corresponding fixing ring (44) near the pump body (1). Multiple spur gears (53) are meshed and driven on the inner contour of the double-sided gear ring (52). The multiple spur gears (53) are rotatably connected to the inner contour of the sleeve (4) near the pump body (1) by a pin shaft. A spur rack (54) is meshed and driven on the outer contour of each spur gear (53). Each spur rack (54) passes through and is slidably connected to a fixed ring (44) at the corresponding position. A locking plate (55) is fixedly connected to the end of each spur rack (54) away from the fixed ring (44).

6. A piston-type oil pump with filtration function according to claim 4, characterized in that: The two conical filters (42) are arranged in opposite directions and are directed from the pump body (1) to the oil inlet pipe (11) and the oil outlet pipe (12) respectively. Multiple locking plates (55) are assembled together to form a ring structure.

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