Oil return connecting device of oil sprayer

Abstract

The utility model relates to the technical field of oil sprayers, and discloses an oil return connecting device of an oil sprayer, which comprises an oil return joint, the oil return joint is used for being connected to an oil outlet at the top of an oil outlet pipe, a positioning assembly is arranged in the oil return joint, and a filtering assembly is arranged outside the oil return joint. A first rotary knob is fixedly installed at the top of the oil return connector, the positioning assembly comprises a connecting pipe and a top disc, the top disc is fixedly installed at the bottom of the oil return connector, the connecting pipe is movably installed at the bottom of the oil return connector, and a plurality of clamping grooves are formed in the bottom of the top disc. Through rotation of the oil return connector, the connection direction of the oil return pipe can be adjusted, fixation of the oil return connector after rotation adjustment is facilitated, and mounting and dismounting between the oil return connector and the oil outlet pipe are facilitated; and through a filter screen and a spiral blade, impurities in oil can be filtered, the oil return quality is improved, regular cleaning and discharging of the internal impurities are facilitated, and internal blockage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fuel injector technology, specifically to a fuel injector return connection device. Background Technology

[0002] The fuel injector is a component in the fuel supply system of an internal combustion engine. Its main function is to spray fuel into the combustion chamber of the engine in an atomized form. During the injection process, some of the unburned fuel will flow back to the fuel tank through the return channel inside the injector.

[0003] The publication number CN204327365U discloses a fuel return structure for a fuel injection pump and a fuel injector, including a fuel injector pipe joint. One end of the fuel injector pipe joint is connected to the return pipeline of the fuel injection pump, one side of the fuel injector pipe joint is connected to the return pipeline of the fuel injector, and the other end of the fuel injector pipe joint opposite to the return pipeline of the fuel injection pump is connected to a return manifold joint.

[0004] The above-mentioned oil return structure can meet the requirements of oil intake at any angle and ensure smooth oil return. However, when connecting the oil return pipe in different directions, the oil return connector needs to be disassembled and reconnected to the oil outlet pipe of the injector. It is not convenient to adjust and fix the connection direction of the oil return pipe. The oil backflow will carry some impurities, making it difficult to filter the impurities in the oil and making it inconvenient to clean the internal parts regularly. Utility Model Content

[0005] The purpose of this invention is to provide a return oil connection device for an injector to solve the technical problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A return oil connection device for an injector includes a return oil connector for connecting to the oil outlet at the top of an oil outlet pipe. A positioning component is installed inside the return oil connector, and a filter component is installed outside the return oil connector. A first knob is fixedly installed on the top of the return oil connector. The positioning component includes a connecting pipe and a top plate. The top plate is fixedly installed at the bottom of the return oil connector, and the bottom of the return oil connector is movably connected to the connecting pipe. Several slots are formed at the bottom of the top plate, and a first retainer is installed at the bottom of the top plate, penetrating the inner wall of the connecting pipe. A base is fixedly installed at the center of the outer side of the connecting pipe. A first threaded groove is formed at the bottom of the outer periphery of the connecting pipe, and a second threaded groove is formed at the top of the outer periphery of the connecting pipe. Four guide grooves are formed around the outer side of the connecting pipe. A second knob is connected to the outer side of the second threaded groove. A positioning plate is movably installed on the top of the second knob. A second retaining ring is installed at the bottom of the positioning plate and through the inside of the second knob. Guide blocks are installed on the inner wall of the positioning plate and in each of the four guide grooves. Several retaining blocks are fixedly installed on the top of the positioning plate.

[0008] Preferably, the interior of the oil return connector is interconnected with the interior of the connecting pipe, the first retaining ring is fixedly installed with the oil return connector, and the first retaining ring is movably rotatable through the inner wall of the connecting pipe.

[0009] Preferably, the second knob is sleeved on the outside of the connecting tube and is threadedly connected through the second screw groove. The second retaining ring is fixed to the positioning plate and passes through the inside of the second knob, allowing it to rotate movably.

[0010] Preferably, the guide block is located in the guide groove and is slidably arranged up and down, and the locking block and the locking groove are mutually engaged.

[0011] Preferably, the filter assembly includes an oil return pipe, which is installed through the outside of the oil return connector. A rotating rod is movably installed inside the oil return pipe, and a turntable is fixedly installed at the outer end of the rotating rod. A filter screen is installed inside the oil return pipe. A spiral blade is installed on the inner end of the outer periphery of the rotating rod. Several through holes are opened at both ends of the spiral blade. A drain pipe is installed through the outside of the oil return pipe, and a sealing cap is fitted around the drain pipe.

[0012] Preferably, the rotating rod is located inside the return oil pipe and is rotatably arranged, with the return oil pipe and the return oil connector being interconnected.

[0013] Preferably, the outer ring of the spiral blade contacts the inner wall of the return oil pipe, and the sealing cap is threaded onto the outside of the drain pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1) This oil return connection device, by setting a positioning component, connects the oil return connector to the connecting pipe through the first retaining ring, so that the oil return connector can be rotated to adjust the direction of the oil return pipe connection. The positioning plate is raised and lowered by the second knob, and the positioning plate is guided and slid by the guide block. The locking of the retaining block and the retaining groove facilitates the fixing of the oil return connector after rotation adjustment, and facilitates the installation and disassembly of the oil return connector and the oil outlet pipe.

[0016] 2) This oil return connection device, by setting up a filter component, allows oil to flow through the through hole and filter impurities in the oil through the filter screen, thereby improving the quality of oil return. The rotating rod drives the spiral blade to rotate, transporting the impurities to the drain pipe, which facilitates the regular cleaning and discharge of internal impurities and reduces internal blockage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the oil return connection device of an injector in an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the positioning component in an embodiment of this utility model;

[0019] Figure 3 This is an internal exploded view of the positioning component in an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the filter component in an embodiment of this utility model;

[0021] Figure 5 This is a front view of the overall interior of the embodiment of this utility model.

[0022] In the diagram: 1. Oil return connector; 2. Oil outlet pipe; 3. Positioning assembly; 4. Filter assembly; 6. Connecting pipe; 7. First knob; 8. Top plate; 9. Slot; 10. First retaining ring; 11. Base plate; 12. First threaded groove; 13. Second threaded groove; 14. Guide groove; 15. Second knob; 16. Positioning plate; 17. Second retaining ring; 18. Guide block; 19. Locking block; 20. Oil return pipe; 21. Rotating rod; 22. Turntable; 23. Filter screen; 24. Spiral blade; 25. Through hole; 26. Drain pipe; 27. Sealing cap. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Combination Figures 1-5 A return oil connection device for an injector includes a return oil connector 1, which is used to connect to the oil outlet at the top of the oil outlet pipe 2. A positioning component 3 is installed inside the return oil connector 1, and a filter component 4 is installed outside the return oil connector 1.

[0026] See Figure 2 and Figure 3 Furthermore, the top of the return oil connector 1 is fixedly installed with a first knob 7. The positioning assembly 3 includes a connecting pipe 6 and a top plate 8. The top plate 8 is fixedly installed at the bottom of the return oil connector 1. The bottom of the return oil connector 1 is movably installed on the connecting pipe 6. Several slots 9 are opened at the bottom of the top plate 8. A first retaining ring 10 is installed at the bottom of the top plate 8 and penetrates the inner wall of the connecting pipe 6. A base plate 11 is fixedly installed at the center of the outside of the connecting pipe 6. A first threaded groove 12 is opened at the bottom of the outer periphery of the connecting pipe 6. A second threaded groove 13 is opened at the top of the outer periphery of the connecting pipe 6. Four guide grooves 14 are opened around the outside of the connecting pipe 6. A second knob 15 is connected to the outside of the second threaded groove 13. A positioning plate 16 is movably installed at the top of the second knob 15. A second retaining ring 17 is installed at the bottom of the positioning plate 16 and penetrates the inside of the second knob 15. Guide blocks 18 are installed on the inner wall of the positioning plate 16 and in each of the four guide grooves 14. Several retaining blocks 19 are fixedly installed at the top of the positioning plate 16.

[0027] The interior of the oil return connector 1 is interconnected with the interior of the connecting pipe 6. The first retaining ring 10 is fixedly installed with the oil return connector 1. The first retaining ring 10 passes through the inner wall of the connecting pipe 6 and is rotatably arranged. The oil return connector 1 and the connecting pipe 6 are connected and sealed by the first retaining ring 10, and can rotate to prevent separation.

[0028] The second knob 15 is sleeved on the outside of the connecting pipe 6 and is threadedly connected through the second screw groove 13. The second retaining ring 17 is fixed to the positioning plate 16. The second retaining ring 17 passes through the inside of the second knob 15 and is movably rotatable. The positioning plate 16 enables the second knob 15 to rotate through the second retaining ring 17 and moves up and down synchronously with the second knob 15.

[0029] The guide block 18 is located in the guide groove 14 and is slidably arranged up and down. The locking block 19 is engaged with the locking groove 9. The guide block 18 and the guide groove 14 prevent the positioning disk 16 from rotating. The locking block 19 is engaged in the locking groove 9 to fix the top plate 8 and the positioning disk 16 to each other, thereby fixing the oil return connector 1 and the connecting pipe 6 to each other.

[0030] Specifically, the oil outlet pipe 2 of the injector is connected to the connecting pipe 6 by thread, and the return oil connector 1 can be rotated by the connection of the first retaining ring 10. At the same time, the positioning plate 16 is raised and lowered to make the retaining block 19 engage in the retaining groove 9. The top plate 8 and the positioning plate 16 are fixed to each other, thereby fixing the return oil connector 1 and the connecting pipe 6 to each other.

[0031] Example 2

[0032] See Figure 4 Furthermore, based on Embodiment 1, the filter assembly 4 includes an oil return pipe 20, which is installed through the outside of the oil return connector 1. A rotating rod 21 is movably installed inside the oil return pipe 20, and a turntable 22 is fixedly installed at the outer end of the rotating rod 21. A filter screen 23 is installed inside the oil return pipe 20. A spiral blade 24 is installed on the inner end of the outer periphery of the rotating rod 21. Several through holes 25 are opened at both ends of the spiral blade 24. A drain pipe 26 is installed through the outside of the oil return pipe 20, and a sealing cap 27 is sleeved on the outer periphery of the drain pipe 26.

[0033] The rotating rod 21 is located inside the return oil pipe 20 and is rotatably arranged. The return oil pipe 20 and the return oil connector 1 are interconnected. The end of the return oil pipe 20 is used for pipeline connection and interconnection with the oil tank. The filter screen 23 is used to filter impurities in the oil.

[0034] The outer ring of the spiral blade 24 contacts the inner wall of the return oil pipe 20, and the sealing cover 27 is threaded onto the outside of the drain pipe 26. The filtered impurities are transported by the rotation of the spiral blade 24 and discharged through the drain pipe 26.

[0035] Specifically, the oil entering the return oil connector 1 flows into the return oil pipe 20, where impurities are filtered by the filter screen 23. The rotating disc 22 causes the spiral blade 24 to rotate and transport the filtered impurities to the drain pipe 26, where they are periodically cleaned and discharged.

[0036] In actual operation, the connecting pipe 6 is connected to the oil outlet pipe 2 of the injector by thread, and the return pipe 20 is connected to the oil tank by pipeline, and the return oil is returned through the return connector 1 and the return pipe 20.

[0037] When adjusting the connection direction of the return oil pipe 20 during the connection process, rotate the second knob 15. The second knob 15 slides downward under the action of the thread of the second screw groove 13, and drives the positioning plate 16 to slide downward. The positioning plate 16 is prevented from rotating with the second knob 15 by the sliding of the guide block 18 and the connection of the second retaining ring 17. While the positioning plate 16 slides downward, the retaining block 19 disengages from the retaining groove 9. The return oil connector 1 rotates through the connection of the first retaining ring 10 to change the connection direction of the return oil pipe 20. After the adjustment is completed, the second knob 15 drives the positioning plate 16 to slide upward, so that the retaining block 19 is inserted into the retaining groove 9, so that the top plate 8 and the positioning plate 16 are fixed to each other, and then the return oil connector 1 and the connecting pipe 6 are fixed to each other. The connecting pipe 6 is rotated by rotating the first knob 7 for installation and disassembly.

[0038] When particulate impurities are present in the oil flowing into the return oil pipe 20, the oil flows through the through hole 25 and the impurities are filtered through the filter screen 23. By rotating the turntable 22, the rotating rod 21 drives the spiral blade 24 to rotate, and the filtered impurities are transported to the drain pipe 26. The impurities are discharged by opening the sealing cover 27 for regular cleaning.

[0039] Although embodiments of the present 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 the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A return oil connection device for an injector, comprising a return oil connector (1), the return oil connector (1) being used to connect to the oil outlet at the top of the oil outlet pipe (2), characterized in that: The oil return connector (1) is equipped with a positioning component (3) inside and a filter component (4) is installed on the outside of the oil return connector (1). The top of the return oil connector (1) is fixedly mounted with a first knob (7). The positioning assembly (3) includes a connecting pipe (6) and a top plate (8). The top plate (8) is fixedly mounted on the bottom of the return oil connector (1). The bottom of the return oil connector (1) is movably mounted on the connecting pipe (6). Several slots (9) are provided on the bottom of the top plate (8). A first retaining ring (10) is installed on the bottom of the top plate (8) and penetrates the inner wall of the connecting pipe (6). A base plate (11) is fixedly mounted on the outer center of the connecting pipe (6). A first threaded groove (12) is provided on the outer periphery of the connecting pipe (6) near the bottom. The connecting pipe (6) has a second threaded groove (13) on its outer periphery near the top. The connecting pipe (6) has four guide grooves (14) around its outer periphery. The second threaded groove (13) is connected to a second knob (15). A positioning plate (16) is movably installed on the top of the second knob (15). A second retaining ring (17) is installed at the bottom of the positioning plate (16) and inside the second knob (15). Guide blocks (18) are installed on the inner wall of the positioning plate (16) and in each of the four guide grooves (14). Several retaining blocks (19) are fixedly installed on the top of the positioning plate (16).

2. The return oil connection device for an injector according to claim 1, characterized in that: The interior of the oil return connector (1) is interconnected with the interior of the connecting pipe (6). The first retaining ring (10) is fixedly installed with the oil return connector (1). The first retaining ring (10) passes through the inner wall of the connecting pipe (6) and is rotatably arranged.

3. The return oil connection device for an injector according to claim 1, characterized in that: The second knob (15) is sleeved on the outside of the connecting tube (6) and is threadedly connected through the second screw groove (13). The second retaining ring (17) is fixed to the positioning plate (16). The second retaining ring (17) passes through the inside of the second knob (15) and is rotatably movable.

4. The return oil connection device for an injector according to claim 1, characterized in that: The guide block (18) is located in the guide groove (14) and is arranged to slide up and down. The locking block (19) and the locking groove (9) are engaged with each other.

5. The return oil connection device for an injector according to claim 1, characterized in that: The filter assembly (4) includes an oil return pipe (20), which is installed through the outside of the oil return connector (1). A rotating rod (21) is movably installed inside the oil return pipe (20). A turntable (22) is fixedly installed at the outer end of the rotating rod (21). A filter screen (23) is installed inside the oil return pipe (20). A spiral blade (24) is installed on the outer periphery of the rotating rod (21) near the inner end. Several through holes (25) are opened at both ends of the spiral blade (24). A drain pipe (26) is installed through the outside of the oil return pipe (20). A sealing cap (27) is fitted around the drain pipe (26).

6. The return oil connection device for an injector according to claim 5, characterized in that: The rotating rod (21) is located inside the oil return pipe (20) and is rotatably arranged. The oil return pipe (20) and the oil return connector (1) are interconnected.

7. The return oil connection device for an injector according to claim 5, characterized in that: The outer ring of the spiral blade (24) is in contact with the inner wall of the return oil pipe (20), and the sealing cap (27) is threaded onto the outside of the drain pipe (26).

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