Abnormal sound reducing structure of crankshaft vent valve

Abstract

An air inlet valve pipe is connected to the bottom of an air inlet valve body, an air inlet seat is arranged at the end of the air inlet valve pipe, an air inlet is formed in the air inlet seat, an air inlet guide groove is formed in the position of an inner hole in the end of the air inlet, and the air inlet guide groove is communicated with the air inlet pipe. According to the utility model, the angle of the air inlet of the air inlet valve pipe is adjusted, so that the inner hole of the air inlet at the air inlet valve pipe at the end part of the air inlet valve body is changed into the air inlet guide groove with the chamfer structure from the traditional right angle, and air enters the air inlet valve pipe and the air inlet valve body from the air inlet and the air inlet guide groove; the resistance of air entering the air inlet valve cavity is reduced, vortex is prevented from being formed after the air enters the air inlet valve cavity, and therefore the phenomenon that a product generates whistling sound in the operation process of the crankshaft ventilation valve is prevented, and the problem that the product generates whistling sound due to the fact that air flow forms vortex in the air inlet valve cavity after air inflow is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile PCV valves, in particular to a crankshaft ventilation valve abnormal noise reduction structure. Background Art

[0002] The PCV valve is a crankshaft ventilation valve, which consists of a valve body, a valve, a valve cover, and a spring. It cannot be disassembled. Its main function is to guide the gas in the crankcase into the intake manifold through the PCV valve, and a small amount of air enters the intake manifold directly from the air filter through the PCV valve, which avoids ice formation at the throttle, incomplete combustion, and deterioration of emissions, prevents blowby gas from entering the atmosphere, and prevents engine oil from deteriorating. When the engine is working, the oil and gas in the crankcase are sucked into the cylinder through the outlet pipe and the one-way valve, and fresh air enters the crankcase through the small air filter on the valve cover;

[0003] However, the inner holes of the air inlet of the existing crankshaft ventilation valve are all right-angle holes. After the air is taken in, the airflow forms a vortex in the product cavity, causing the product to produce a whistling sound. Utility Model Content

[0004] The utility model provides a crankshaft ventilation valve abnormal noise reduction structure, which can effectively solve the problem proposed in the above background technology that the inner holes of the air inlet of the existing crankshaft ventilation valve are all right-angle holes, and the airflow forms a vortex in the product cavity after intake, thereby causing the product to produce a whistling sound.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a crankshaft ventilation valve abnormal noise reduction structure, comprising an intake valve body and an outlet valve body, the top of the intake valve body is integrally connected with the outlet valve body, the bottom of the intake valve body is connected with an intake valve pipe, the end of the intake valve pipe is provided with an intake seat, the interior of the intake seat is provided with an intake port, and an intake guide groove is provided at the inner hole position of the end of the intake port;

[0006] The inlet valve body is provided with an inlet valve cavity inside, a valve core is embedded in the inner side of the inlet valve cavity and is movably connected, a first spring is sleeved on the outer side of the valve core, an outlet valve cavity is provided inside the outlet valve body, a second spring is embedded in the inner side of the outlet valve cavity and is connected, a connecting ring is provided at the connection between the top of the inlet valve body and the outlet valve body, and an exhaust hole is opened inside the connecting ring;

[0007] The side end of the air inlet valve body is provided with an annular welding rib, and the bottom end of the air outlet valve body is provided with a welding convex ring.

[0008] Preferably, the air intake guide groove is provided with a chamfer, and the cross section of the air intake guide groove is trumpet-shaped.

[0009] Preferably, the top of the valve core is connected to the inner side of the exhaust hole, and a gap groove is provided between the valve core and the exhaust hole.

[0010] Preferably, a position limiting groove is provided between the inner side of the annular welding rib and the intake valve body, a connecting sleeve is provided at the bottom end of the annular welding rib, a fitting groove is provided between the inner side of the connecting sleeve and the intake valve pipe, a sealing convex ring is embedded and connected at the inner bottom of the fitting groove, and an extrusion air cushion is provided at the bottom edge of the intake valve pipe;

[0011] The bottom edge of the air outlet valve body is provided with an extrusion bulge, and the edge of the connecting ring is provided with a rubber gasket.

[0012] Preferably, the welding convex ring is embedded and welded in the limiting groove, and a clamping bevel is provided at the contact position between the inner wall of the limiting groove and the welding convex ring.

[0013] Preferably, after the welding protrusion ring is connected to the annular welding rib, the extrusion protrusion is in close contact with the rubber gasket;

[0014] The inner side of the connecting sleeve is provided with an internal thread, and the connecting sleeve is connected to the connecting pipe, and the end of the connecting pipe is in close contact with the sealing convex ring, and the extruded air cushion is in close contact with the end of the intake pipe.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the utility model has a scientific and reasonable structure and is safe and convenient to use:

[0016] 1. By adjusting the angle of the air inlet of the intake valve pipe, the inner hole of the air inlet at the intake valve pipe at the end of the intake valve body is changed from the traditional right angle to an intake guide groove with a chamfered structure, so that when the gas enters the intake valve pipe and the intake valve body from the air inlet and the intake guide groove, the resistance of the gas entering the intake valve cavity is reduced, and the formation of vortex after the gas enters the intake valve cavity is avoided, thereby preventing the crankshaft ventilation valve from producing a whistling sound during operation, and solving the problem of the product producing a whistling sound due to the formation of vortex in the intake valve cavity after intake.

[0017] 2. The annular welding rib and the limiting slot facilitate the rapid alignment connection of the welding convex ring, and the rapid and accurate welding between the annular welding rib and the welding convex ring, thereby ensuring the position accuracy of the connection between them and reducing the difficulty of the combined connection between the intake valve body and the outlet valve body. At the same time, by using the extrusion convex block and the rubber gasket, the connection between the intake valve body and the outlet valve body can be closely fitted and contacted after the connection, thereby ensuring the connectivity accuracy between the intake valve cavity and the outlet valve cavity and avoiding the phenomenon of air flow turbulence.

[0018] 3. The connecting sleeve at the bottom of the annular welding rib is used to conveniently connect the intake valve body to the connecting pipe, and the sealing convex ring is used to ensure the tightness of the connection between the intake valve body and the connecting pipe to avoid looseness. At the same time, the extrusion air cushion is used to ensure the tightness of the alignment contact when the intake valve pipe is connected to the intake pipe, so that the incoming gas can completely enter the intake port through the intake guide groove, thereby ensuring high-precision transmission of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a cross-sectional view of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the connecting ring of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the valve core of the utility model;

[0025] Figure 5 It is a top view of the utility model;

[0026] Figure 6 It is a bottom view of the utility model;

[0027] Numbers in the figure: 1. Inlet valve body; 2. Outlet valve body; 3. Inlet valve pipe; 4. Inlet seat; 5. Inlet port; 6. Inlet guide groove; 7. Inlet valve chamber; 8. Valve core; 9. First spring; 10. Outlet valve chamber; 11. Second spring; 12. Connecting ring; 13. Exhaust hole; 14. Annular welding rib; 15. Limiting slot; 16. Welding convex ring; 17. Connecting sleeve; 18. Fitting groove; 19. Sealing convex ring; 20. Extrusion air cushion; 21. Extrusion convex block; 22. Rubber gasket. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] Example: Figure 1-6As shown, the utility model provides a technical solution, a crankshaft ventilation valve abnormal noise reduction structure, comprising an intake valve body 1 and an outlet valve body 2, the top of the intake valve body 1 is integrally connected with the outlet valve body 2, the bottom of the intake valve body 1 is connected with an intake valve pipe 3, the end of the intake valve pipe 3 is provided with an intake seat 4, the interior of the intake seat 4 is provided with an intake port 5, and the end of the intake port 5 is provided with an intake guide groove 6 at the inner hole position;

[0030] An intake valve cavity 7 is provided inside the intake valve body 1, and an intake guide groove 6 is provided with a chamfer, and the cross section of the intake guide groove 6 is in a trumpet shape. By adjusting the angle of the intake port 5 of the intake valve pipe 3, the inner hole of the intake port 5 at the intake valve pipe 3 at the end of the intake valve body 1 is changed from a traditional right angle to an intake guide groove 6 with a chamfered structure, thereby reducing the resistance of gas entering the intake valve cavity 7, avoiding the formation of vortex after the gas enters the intake valve cavity 7, and preventing the occurrence of a sharp whistle sound generated by the crankshaft ventilation valve during operation. A valve core 8 is embedded in the inner side of the air valve cavity 7 and is movably connected. A first spring 9 is sleeved on the outer side of the valve core 8. An air outlet valve cavity 10 is provided inside the air outlet valve body 2. A second spring 11 is embedded in the inner side of the air outlet valve cavity 10. A connecting ring 12 is provided at the connection between the top of the air inlet valve body 1 and the air outlet valve body 2. An exhaust hole 13 is provided inside the connecting ring 12. The top of the valve core 8 is connected to the inner side of the exhaust hole 13. A gap groove is provided between the valve core 8 and the exhaust hole 13 to facilitate the exhaust of the incoming gas into the air outlet valve body 2.

[0031] An annular welding rib 14 is provided at the edge of the inlet valve body 1 , and a welding convex ring 16 is provided at the bottom of the outlet valve body 2 .

[0032] A limit slot 15 is provided at a position between the inner side of the annular welding rib 14 and the intake valve body 1, and a welding convex ring 16 is embedded and welded in the limit slot 15. A clamping bevel is provided at the contact position between the inner wall of the limit slot 15 and the welding convex ring 16, so as to facilitate the rapid and accurate welding between the annular welding rib 14 and the welding convex ring 16. A connecting sleeve 17 is provided at the bottom end of the annular welding rib 14, and a fitting groove 18 is provided at a position between the inner side of the connecting sleeve 17 and the intake valve pipe 3, and a fitting groove 18 is embedded at the inner bottom of the fitting groove 18. The inlet is connected with a sealing convex ring 19, the inner side of the connecting sleeve 17 is provided with an internal thread, and the connecting sleeve 17 is connected with the connecting pipe, and the end of the connecting pipe is in close contact with the sealing convex ring 19, and the extrusion air cushion 20 is in close contact with the end of the intake pipe, which is convenient for connecting the intake valve body 1 with the connecting pipe, and the sealing convex ring 19 is used to ensure the tightness of the connection between the intake valve body 1 and the connecting pipe to avoid looseness therebetween, and the bottom edge of the intake valve pipe 3 is provided with an extrusion air cushion 20;

[0033] An extrusion protrusion 21 is provided on the bottom edge of the exhaust valve body 2, and a rubber gasket 22 is provided on the edge of the connecting ring 12. After the welding protrusion 16 is connected to the annular welding rib 14, the extrusion protrusion 21 and the rubber gasket 22 are in close contact, which facilitates the rapid alignment connection of the welding protrusion 16 and ensures the position accuracy of the connection therebetween.

[0034] Working principle and use process of the utility model: In the actual application process of the abnormal noise reduction structure of the crankshaft ventilation valve, firstly, in the process of assembling the ventilation valve body, the annular welding rib 14 and the limiting groove 15 are used to facilitate the rapid alignment connection of the welding convex ring 16, so as to facilitate the rapid and accurate welding between the annular welding rib 14 and the welding convex ring 16, ensure the position accuracy of the connection therebetween, and reduce the difficulty of assembling and connecting the intake valve body 1 and the outlet valve body 2;

[0035] At the same time, during the process of the alignment welding between the welding protrusion ring 16 and the annular welding rib 14, the extrusion protrusion 21 and the rubber gasket 22 are used to make the inlet valve body 1 and the outlet valve body 2 closely fit and contact at the connection therebetween after they are connected, thereby ensuring the communication accuracy between the inlet valve cavity 7 and the outlet valve cavity 10 and avoiding the phenomenon of air flow turbulence;

[0036] After the inlet valve body 1 and the outlet valve body 2 are assembled, the outlet valve body 2 needs to be connected to the inlet manifold, and the inlet valve body 1 also needs to be connected to the external connecting pipe and the inlet pipe. When the inlet valve body 1 is connected, the connecting sleeve 17 at the bottom of the annular welding rib 14 is used to facilitate the connection of the inlet valve body 1 and the connecting pipe, and the sealing convex ring 19 is used to ensure the tightness of the connection between the inlet valve body 1 and the connecting pipe to avoid looseness.

[0037] In addition, by using the squeeze air cushion 20, when the intake valve pipe 3 is connected to the intake pipe, the tightness of the contact between them is ensured, so that the incoming gas can completely enter the intake port 5 through the intake guide groove 6, thereby ensuring high-precision transmission of the gas;

[0038] Finally, when the engine is working, the oil and gas in the crankcase enter the air intake port 5 through the air intake guide groove 6 in the air intake seat 4, and are then transported from the air intake port 5 to the air intake valve cavity 7 in the air intake valve pipe 3. In this process, the air intake port 5 of the air intake valve pipe 3 is adjusted in angle so that the inner hole of the air intake port 5 at the air intake valve pipe 3 at the end of the air intake valve body 1 is changed from the traditional right angle to the air intake guide groove 6 with a chamfered structure, so that in the process of the gas entering the air intake valve pipe 3 and the air intake valve body 1 from the air intake port 5 and the air intake guide groove 6, the resistance of the gas entering the air intake valve cavity 7 is reduced, so that the gas can avoid forming a vortex after entering the air intake valve cavity 7, thereby preventing the crankshaft ventilation valve from producing a sharp whistle during operation.

[0039] Finally, it should be noted that the above description is only a preferred example of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A crankshaft ventilation valve noise reduction structure, comprising an intake valve body (1) and an outlet valve body (2), characterized in that: The top of the inlet valve body (1) is integrally connected to the outlet valve body (2), the bottom of the inlet valve body (1) is connected to the inlet valve pipe (3), the end of the inlet valve pipe (3) is provided with an inlet seat (4), the interior of the inlet seat (4) is provided with an inlet port (5), and an inlet guide groove (6) is provided at the inner hole position of the end of the inlet port (5); An inlet valve cavity (7) is provided inside the inlet valve body (1), a valve core (8) is embedded in the inner side of the inlet valve cavity (7) and is movably connected, a first spring (9) is sleeved on the outer side of the valve core (8), an outlet valve cavity (10) is provided inside the outlet valve body (2), a second spring (11) is embedded in the inner side of the outlet valve cavity (10), a connecting ring (12) is provided at the connection between the top of the inlet valve body (1) and the outlet valve body (2), and an exhaust hole (13) is provided inside the connecting ring (12); The side end of the air inlet valve body (1) is provided with an annular welding rib (14), and the bottom end of the air outlet valve body (2) is provided with a welding convex ring (16); The air intake guide groove (6) is provided with a chamfer, and the cross section of the air intake guide groove (6) is in a trumpet shape.

2. The crankshaft ventilation valve abnormal noise reduction structure according to claim 1, characterized in that: The top of the valve core (8) is connected to the inner side of the exhaust hole (13), and a clearance groove is provided between the valve core (8) and the exhaust hole (13).

3. The crankshaft ventilation valve abnormal noise reduction structure according to claim 1, characterized in that: A position between the inner side of the annular welding rib (14) and the intake valve body (1) is provided with a limit groove (15); a connecting sleeve (17) is provided at the bottom end of the annular welding rib (14); a fitting groove (18) is provided between the inner side of the connecting sleeve (17) and the intake valve pipe (3); a sealing convex ring (19) is embedded and connected to the inner bottom of the fitting groove (18); and an extrusion air cushion (20) is provided at the bottom edge of the intake valve pipe (3); The bottom edge of the gas outlet valve body (2) is provided with an extrusion protrusion (21), and the edge of the connecting ring (12) is provided with a rubber gasket (22).

4. The crankshaft ventilation valve abnormal noise reduction structure according to claim 3, characterized in that: The welding convex ring (16) is embedded and welded in the limiting clamping groove (15), and a clamping inclined block is provided at the contact position between the inner wall of the limiting clamping groove (15) and the welding convex ring (16).

5. The crankshaft ventilation valve abnormal noise reduction structure according to claim 3, characterized in that: After the welding protrusion (16) and the annular welding rib (14) are connected, the extrusion protrusion (21) and the rubber gasket (22) are in close contact; The inner side of the connecting sleeve (17) is provided with an internal thread, and the connecting sleeve (17) is connected to the connecting pipe, and the end of the connecting pipe is in close contact with the sealing convex ring (19), and the extrusion air cushion (20) is in close contact with the end of the intake pipe.

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