Oil inlet structure of two-stroke gasoline engine
By designing a detachable fuel filter structure, the problem of fuel filters in the prior art that easily leads to dirt accumulation and high replacement costs is solved, and higher service life, material utilization and maintenance efficiency are achieved.
Patent Information
- Application Number
- CN202421419213.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The fuel filters of existing two-stroke gasoline engines are likely to cause dirt to accumulate inside the filter after long-term use, resulting in fuel pollution, reduced filtration efficiency, and high overall replacement cost and low material utilization.
A fuel filter structure including a shell, oil outlet pipe, cover and filter element is designed. Through annular slots and mechanical structures such as insert plates, threaded grooves and fixing plates, the cover is removed and the filter element is cleaned or replaced, reducing the overall number of replacements.
It improves the service life of the fuel filter, increases the utilization rate of materials, reduces the maintenance and maintenance costs of the gasoline engine, and improves the sealing and stability of the fuel filter.
Smart Images
Figure CN222558648U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of two-stroke gasoline engines, in particular to an oil inlet structure of a two-stroke gasoline engine. Background Art
[0002] A two-stroke gasoline engine only needs one crankshaft rotation and two strokes to complete a working cycle. The current oil inlet structure of a two-stroke gasoline engine carburetor includes a carburetor, an oil inlet pipe and a fuel filter. The upper end of the oil inlet pipe is connected to a carburetor copper tube, and the lower end is plugged with a fuel filter. The oil inlet pipe and the fuel filter are soaked in the fuel tank. The existing fuel filter is prone to dirt accumulation inside the filter after long-term use. If it is not handled in time, it is easy to pollute the filtered fuel again. The filtered dirt is directly accumulated in the filter, which not only easily causes the mesh to be blocked, but also reduces the fuel filtration efficiency.
[0003] However, most existing fuel filters are integrated, and when maintaining the car, the filter needs to be replaced as a whole, which results in low material utilization and high replacement cost. Therefore, it is urgent to design an oil inlet structure for a two-stroke gasoline engine to solve the above problems. Utility Model Content
[0004] The purpose of the utility model is to provide an oil inlet structure for a two-stroke gasoline engine to solve the above-mentioned deficiencies in the prior art.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A fuel inlet structure of a two-stroke gasoline engine comprises a fuel tank, a fuel delivery pipe, a carburetor and a fuel filter, wherein the fuel filter comprises a shell, a fuel outlet pipe, a cover and a filter element, wherein an annular slot is provided on the upper side of the shell, an annular plug plate is fixedly installed on the lower side of the cover, the annular plug plate is movably inserted in the annular slot, an annular extension plate is fixedly installed on the lower side of the cover, an annular fixing plate is slidably installed on the lower side of the annular extension plate, a threaded tooth is arranged on the inner circumference of the annular fixing plate, a threaded groove is provided on the circumference of the upper end of the shell, and the annular fixing plate is inserted through the threaded groove. The teeth are threadedly connected with the thread groove, four installation grooves are opened on the circumference of the shell, four insertion holes are opened on the circumference of the annular plug plate, the four installation grooves correspond to the four insertion holes respectively, a plug column is slidably installed in the installation groove, one end of the plug column is movably inserted in the insertion hole, slideways are opened on both sides of the inner wall of the installation groove, and limiting sliders are fixedly installed on both sides of the plug column, the limiting slider is slidably installed in the slideway, a first spring is arranged between the limiting slider and one side of the inner wall of the slideway, and the other end of the plug column is fitted with the annular fixing plate.
[0007] A support plate is fixedly installed in the shell, a center tube is arranged on the upper side of the support plate, the filter element is sleeved around the center tube, and a fixing plate is fixedly installed around the lower end of the filter element.
[0008] Four sliding grooves are provided on the circumference of the inner wall of the annular slot, and four sockets are provided on the circumference of the fixed plate, and the four sockets correspond to the four sliding grooves respectively. Grooves are provided on both sides of the inner wall of the sliding groove, and an insertion rod is slidably installed in the sliding groove, and sliders are fixedly installed on both sides of the insertion rod. Two sliders are slidably installed in the two grooves respectively, and a second spring is provided between the slider and one side of the inner wall of the groove. One end of the insertion rod is movably inserted in the socket, and an annular protrusion is provided on the circumference of the lower end of the annular plug plate, and the annular protrusion is in contact with the other ends of the four insertion rods.
[0009] Four limiting rods are arranged on the lower side of the fixing plate, four limiting grooves are opened on the upper side of the supporting plate, the four limiting rods are movably inserted in the four limiting grooves respectively, a mounting groove is opened on the upper side of the supporting plate, a filter screen is arranged in the mounting groove, and the filter screen is located on the lower side of the filter element.
[0010] The oil outlet pipe is arranged between the covers, a plurality of oil inlets are opened on the upper side of the covers, and the covers are located on the upper side of the shell.
[0011] A plurality of pores are provided on the peripheral side of the central tube, and the plurality of pores correspond to the filter element. The upper end of the central tube is clamped with the lower end of the oil outlet pipe.
[0012] In the above technical solution, the utility model provides an oil inlet structure for a two-stroke gasoline engine, and the beneficial effects are:
[0013] (1) The annular fixing plate and the threaded groove enable the staff to disassemble the cover to clean or replace the filter element inside it, thereby reducing the number of replacements of the entire fuel filter, thereby increasing the service life of the entire fuel filter, improving the utilization rate of materials, and saving the cost of gasoline engine maintenance.
[0014] (2) By providing the annular plug plate and the plug post, when the worker installs the cover back onto the housing, the sealing between the cover and the housing can be improved, and the stability of the cover after being installed on the housing can be improved, thereby improving the practicality of the fuel filter when in use.
[0015] (3) By setting the limit slider and the slide, when the cover needs to be removed or installed and the plug column needs to be moved, the limit slider moves along the slide, which can improve the stability of the plug column during movement, thereby improving the stability and practicality of the workers when removing or installing the fuel filter. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.
[0017] Figure 1 The utility model provides an overall structural schematic diagram of an oil inlet structure embodiment of a two-stroke gasoline engine.
[0018] Figure 2 The utility model provides an overall cross-sectional structural schematic diagram of an oil inlet structure embodiment of a two-stroke gasoline engine.
[0019] Figure 3 The utility model is a schematic diagram of the overall structure of a fuel filter provided in an oil inlet structure embodiment of a two-stroke gasoline engine.
[0020] Figure 4 The utility model is a schematic diagram of a cross-sectional structure of a fuel filter provided in an oil inlet structure embodiment of a two-stroke gasoline engine.
[0021] Figure 5 The utility model provides a two-stroke gasoline engine oil inlet structure embodiment Figure 4 Schematic diagram of the structure at point A in the middle.
[0022] Figure 6 The utility model provides a two-stroke gasoline engine oil inlet structure embodiment Figure 4 Schematic diagram of the structure at point B in the middle.
[0023] 1. Fuel tank; 2. Fuel delivery pipe; 3. Carburetor; 4. Fuel filter; 5. Housing; 6. Fuel outlet pipe; 7. Cover; 8. Fuel inlet; 9. Filter element; 10. Fixing plate; 11. Support plate; 12. Filter screen; 13. Limit rod; 14. Center tube; 15. Pores; 16. Annular slot; 17. Annular plug plate; 18. Annular protrusion; 19. Annular extension plate; 20. Annular fixing plate; 21. Threaded groove; 24. Sliding groove; 25. Channel; 26. Socket; 27. Slider; 28. Plug rod; 29. Second spring; 30. Socket; 31. Mounting groove; 32. Plug column; 33. Slideway; 34. Limit slider; 35. First spring. DETAILED DESCRIPTION
[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0025] like Figure 1-6As shown, an oil inlet structure of a two-stroke gasoline engine provided by an embodiment of the utility model comprises a fuel tank 1, an oil delivery pipe 2, a carburetor 3 and a fuel filter 4, wherein the fuel filter 4 comprises a housing 5, an oil outlet pipe 6, a cover 7 and a filter element 9, an annular slot 16 is provided on the upper side of the housing 5, an annular plug plate 17 is fixedly installed on the lower side of the cover 7, the annular plug plate 17 is movably plugged into the annular slot 16, an annular extension plate 19 is fixedly installed on the lower side of the cover 7, an annular fixing plate 20 is slidably installed on the lower side of the annular extension plate 19, a threaded tooth is provided on the inner circumferential side of the annular fixing plate 20, a threaded groove 21 is provided on the circumferential side of the upper end of the housing 5, and the annular fixing plate 20 is provided on the inner circumferential side of the annular fixing plate 20. The plate 20 is threadedly connected to the thread groove 21 through thread teeth, four installation grooves 31 are opened on the peripheral side of the shell 5, and four insertion holes 30 are opened on the peripheral side of the annular plug plate 17. The four installation grooves 31 correspond to the four insertion holes 30 respectively, and a plug column 32 is slidably installed in the installation groove 31. One end of the plug column 32 is movably inserted in the insertion hole 30. Slideways 33 are opened on both sides of the inner wall of the installation groove 31. Limiting sliders 34 are fixedly installed on both sides of the plug column 32. The limiting slider 34 is slidably installed in the slideway 33. A first spring 35 is arranged between the limiting slider 34 and one side of the inner wall of the slideway 33, and the other end of the plug column 32 is fitted with the annular fixed plate 20.
[0026] Specifically, in the present embodiment, when the filter element 9 needs to be cleaned or replaced, the annular fixing plate 20 is rotated so that the annular fixing plate 20 moves upward along the threaded groove 21 and the annular extension plate 19, and then the annular extension plate 19 moves upward to stop squeezing the plug post 32, and then the plug post 32 moves outward by the elastic force of the first spring 35, and the outward movement of the plug post 32 can release the fixation of the annular plug plate 17, and then the cover 7 is pulled outward to drive the annular plug plate 17 to move out of the annular slot 16, so that it is convenient for the staff to disassemble and clean the filter element 9 inside. Or replace, after cleaning or replacing the filter element 9, the cover 7 can be installed and fixed by reversing the above steps, wherein one end of the pin 32 is set to an arc shape, and a chamfered surface is set on the lower side of the annular fixing plate 20. The chamfered surface cooperates with the arc shape, so that when the cover 7 is installed, it is convenient for the annular fixing plate 20 to squeeze the pin 32, so that the pin 32 moves inwardly and is inserted into the socket 30 to fix the annular plug plate 17. At the same time, a sealing gasket is provided on the side of the annular plug plate 17, and the sealing gasket is located between the outer shell 5 and the cover 7, thereby improving the sealing between the cover and the outer shell.
[0027] The utility model provides an oil inlet structure of a two-stroke gasoline engine, wherein a support plate 11 is fixedly installed in a housing 5, a center tube 14 is arranged on the upper side of the support plate 11, a filter element 9 is sleeved on the peripheral side of the center tube 14, a fixing plate 10 is fixedly installed on the peripheral side of the lower end of the filter element 9, four sliding grooves 24 are opened on the peripheral side of the inner wall of the annular slot 16, four sockets 26 are opened on the peripheral side of the fixing plate 10, and the four sockets 26 correspond to the four sliding grooves 24 respectively, grooves 25 are opened on both sides of the inner wall of the sliding groove 24, a plug rod 28 is slidably installed in the sliding groove 24, and sliders 27 are fixedly installed on both sides of the plug rod 28, and the two The sliders 27 are slidably installed in the two grooves 25 respectively, and a second spring 29 is arranged between the slider 27 and one side of the inner wall of the groove 25. One end of the plug rod 28 is movably inserted in the socket 26. An annular protrusion 18 is arranged on the circumference of the lower end of the annular plug plate 17. The annular protrusion 18 is fitted with the other ends of the four plug rods 28. Four limiting rods 13 are arranged on the lower side of the fixed plate 10, and four limiting grooves are opened on the upper side of the support plate 11. The four limiting rods 13 are movably inserted in the four limiting grooves respectively. A mounting groove is opened on the upper side of the support plate 11, and a filter screen 12 is arranged in the mounting groove. The filter screen 12 is located at the lower side of the filter element 9.
[0028] The filter element 9 is then pulled outwards, and the filter element 9 is moved along the central tube 14, and the limiting rod 13 is separated from the limiting groove, so that the staff can remove the filter element 9. When installing, the above steps can be reversed to complete the installation and fixation of the filter element 9. One end of the plug rod 28 is set in an arc shape, and a chamfered surface is set on the lower side of the annular protrusion 18. The chamfered surface cooperates with the arc shape to facilitate the annular protrusion 18 to squeeze the plug rod 28, so that the plug rod 28 moves inwards and inserts into the socket to fix the fixing plate 10.
[0029] The utility model provides an oil inlet structure of a two-stroke gasoline engine, wherein an oil outlet pipe 6 is arranged between covers 7, a plurality of oil inlet ports 8 are provided on the upper side of the cover 7, the cover 7 is located on the upper side of the housing 5, a plurality of pores 15 are provided on the peripheral side of a central tube 14, the plurality of pores 15 all correspond to filter elements 9, and the upper end of the central tube 14 is clamped with the lower end of the oil outlet pipe 6.
[0030] In another embodiment provided by the utility model, when the fuel filter 4 is in use, the gasoline in the fuel tank 1 enters the housing 5 through the fuel inlet 8, and then is filtered by the filter element 9. The filtered gasoline enters the central tube 14 through the pores 15, and then the gasoline enters the oil outlet pipe 6 through the central tube 14, and enters the carburetor 3 through the oil outlet pipe 6 and the oil delivery pipe 2. After the carburetor 3 processes the gasoline, it is sent to the gasoline engine. At the same time, when a small amount of water in the gasoline passes through the filter element 9, smaller water droplets are adsorbed on the surface of the condensation layer of the filter element 9, and the small water droplets gradually become large water droplets. The large water droplets are precipitated into the chamber on the lower side of the support plate 11 through the filter element 9 and the filter screen 12.
[0031] Working principle: when the filter element 9 needs to be cleaned or replaced, the annular fixing plate 20 is rotated to move it, the squeezing of the plug post 32 is stopped, and then the plug post 32 is moved outward by the elastic force of the first spring 35. The outward movement of the plug post 32 can release the fixation of the annular plug plate 17, and then the staff can remove the cover 7. At the same time, when the cover 7 is removed and the annular plug plate 17 is driven to move out of the annular slot 16, the squeezing of the plug rod 28 is released, and then the plug rod 28 is moved outward by the elastic force of the second spring 29. Then, when the plug rod 28 moves outward, it can be separated from the socket 26, releasing the fixed limit of the fixing plate 10, and then the staff pulls the filter element 9 outward, and the filter element 9 can be removed for cleaning or replacement. When installing, the above steps can be reversed to complete the installation of the filter element 9.
[0032] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A fuel inlet structure for a two-stroke gasoline engine, comprising a fuel tank (1), a fuel delivery pipe (2), a carburetor (3) and a fuel filter (4), characterized in that: The fuel filter (4) comprises a housing (5), an oil outlet pipe (6), a cover (7) and a filter element (9); an annular slot (16) is provided on the upper side of the housing (5); an annular plug plate (17) is fixedly mounted on the lower side of the cover (7); the annular plug plate (17) is movably plugged into the annular slot (16); an annular extension plate (19) is fixedly mounted on the lower side of the cover (7); an annular fixing plate (20) is slidably mounted on the lower side of the annular extension plate (19); a threaded tooth is provided on the inner circumferential side of the annular fixing plate (20); a threaded groove (21) is provided on the circumferential side of the upper end of the housing (5); the annular fixing plate (20) is threadedly connected to the threaded groove (21) via the threaded tooth; and a threaded groove (21) is provided on the circumferential side of the housing (5). There are four installation grooves (31), four insertion holes (30) are opened on the circumference of the annular plug plate (17), and the four installation grooves (31) correspond to the four insertion holes (30) respectively. A plug post (32) is slidably installed in the installation groove (31), and one end of the plug post (32) is movably inserted in the insertion hole (30). Slideways (33) are opened on both sides of the inner wall of the installation groove (31), and limiting sliders (34) are fixedly installed on both sides of the plug post (32). The limiting slider (34) is slidably installed in the slideway (33). A first spring (35) is arranged between the limiting slider (34) and one side of the inner wall of the slideway (33), and the other end of the plug post (32) is in contact with the annular fixing plate (20).
2. The oil inlet structure of a two-stroke gasoline engine according to claim 1, characterized in that: A support plate (11) is fixedly mounted inside the housing (5), a center tube (14) is provided on the upper side of the support plate (11), the filter element (9) is sleeved around the circumference of the center tube (14), and a fixing plate (10) is fixedly mounted on the circumference of the lower end of the filter element (9).
3. The oil inlet structure of a two-stroke gasoline engine according to claim 1, characterized in that: Four sliding grooves (24) are provided on the inner wall of the annular slot (16), and four sockets (26) are provided on the inner wall of the fixed plate (10). The four sockets (26) correspond to the four sliding grooves (24) respectively. Grooves (25) are provided on both sides of the inner wall of the sliding groove (24). An insertion rod (28) is slidably installed in the sliding groove (24). Slide blocks (27) are fixedly installed on both sides of the insertion rod (28). Two slide blocks (27) are slidably installed in the two grooves (25) respectively. A second spring (29) is provided between the slide block (27) and one side of the inner wall of the groove (25). One end of the insertion rod (28) is movably inserted into the socket (26). An annular protrusion (18) is provided on the lower end of the annular plug plate (17). The annular protrusion (18) fits with the other ends of the four insertion rods (28).
4. The oil inlet structure of a two-stroke gasoline engine according to claim 2, characterized in that: Four limiting rods (13) are arranged on the lower side of the fixing plate (10), four limiting grooves are opened on the upper side of the supporting plate (11), the four limiting rods (13) are movably inserted in the four limiting grooves respectively, a mounting groove is opened on the upper side of the supporting plate (11), a filter screen (12) is arranged in the mounting groove, and the filter screen (12) is located on the lower side of the filter element (9).
5. The oil inlet structure of a two-stroke gasoline engine according to claim 4, characterized in that: The oil outlet pipe (6) is arranged between the covers (7), a plurality of oil inlets (8) are provided on the upper side of the covers (7), and the covers (7) are located on the upper side of the housing (5).
6. The oil inlet structure of a two-stroke gasoline engine according to claim 5, characterized in that: A plurality of pores (15) are provided on the circumference of the central tube (14), each of the plurality of pores (15) corresponding to the filter element (9), and the upper end of the central tube (14) is clamped with the lower end of the oil outlet pipe (6).