Abnormal sound reducing structure of crankshaft vent valve
By setting a fixed plate and a restriction hole on the inner side of the upper housing of the crankshaft ventilation valve, the valve core is limited, and combined with the design of the baffle and inner hole, the diameter of the valve core and the spring is reduced and the gap is increased, the problem of the existing crankshaft ventilation valve swing and abnormal noise caused by the airflow is solved, and the effect of reducing abnormal noise is achieved.
Patent Information
- Application Number
- CN202422024364.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-08-21
AI Technical Summary
The internal structure of the existing crankshaft ventilation valve is a spring-plus valve core combination, which can easily cause the valve core to swing and cause abnormal noise when hitting the shell.
A crankshaft ventilation valve is designed to reduce abnormal noise. By setting a fixed plate and a restriction hole on the inner side of the upper shell, the valve core is limited at the top; the position of the valve core is limited in combination with the baffle and the inner hole, the diameter of the valve core and the spring is reduced, and the gap with the inner space of the lower shell is increased, so as to prevent the valve core from swinging and touching the inner wall of the lower shell.
The swing amplitude of the valve core is effectively controlled, and the abnormal noise of the valve core hitting the inner wall of the housing is avoided, so that the crankshaft ventilation valve does not cause abnormal noise during operation.
Smart Images
Figure CN222962941U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile parts, and specifically relates to a structure for reducing abnormal noise of a crankcase ventilation valve. Background Technique
[0002] The crankcase ventilation valve mainly consists of a valve body, a valve, a valve cover and a spring. Its main function is to introduce the gas in the crankcase into the intake manifold through the ventilation valve, and a small amount of air directly enters the intake manifold from the air filter through the ventilation valve, thus avoiding the phenomena of icing at the throttle, incomplete combustion and deteriorated emissions. When the engine is working, the oil and gas in the crankcase are inhaled into the cylinder through the outlet pipe and the check valve, and the fresh air enters the crankcase through the small air filter on the valve cover;
[0003] However, the internal structure of the existing crankcase ventilation valve is a combination of a spring and a valve core. When the product passes through the air flow, it is easily affected by the abnormal noise of the air flow, resulting in the swing of the valve core inside the product, so that the tail of the valve core knocks on the outer shell of the product, generating knocking abnormal noise. Content of the Utility Model
[0004] The utility model provides a structure for reducing abnormal noise of a crankcase ventilation valve, which can effectively solve the problem that the internal structure of the existing crankcase ventilation valve is a combination of a spring and a valve core. When the product passes through the air flow, it is easily affected by the abnormal noise of the air flow, resulting in the swing of the valve core inside the product, so that the tail of the valve core knocks on the outer shell of the product, generating knocking abnormal noise as mentioned in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical scheme: A structure for reducing abnormal noise of a crankcase ventilation valve, including a valve body, the top of the valve body is connected with an upper shell, and the bottom of the valve body is connected with a lower shell. An air inlet is opened at the middle end of the bottom of the lower shell. A spring is embedded and connected inside the valve body and the lower shell. A valve core is fitted and sleeved inside the spring, and the valve core is connected to the inside of the valve body, the upper shell and the lower shell;
[0006] A baffle is embedded and connected to the inner bottom of the upper shell. An inner hole is opened in the baffle. The valve core is fitted and connected in the inner hole, and a limiting column is connected to the edge of the baffle;
[0007] A fixing plate is embedded and connected to the inner top of the upper shell. A limiting hole is arranged inside the fixing plate. The valve core is fitted and connected in the limiting hole. A rib block is arranged at the position corresponding to the end of the spring at the bottom end of the valve core.
[0008] Preferably, a limiting hole is opened at the inner edge of the upper shell, and the baffle is fitted and connected with the limiting hole through the limiting column at its edge. The baffle and the inside of the upper shell are in interference fit, and the baffle and the upper shell form an integral structure.
[0009] Preferably, the fixed plate is embedded inside the upper shell by injection molding. The rib blocks limit the ends of the spring. The diameter of the valve core is smaller than the inner diameter of the spring, and the outer diameter of the spring is much smaller than the inner diameters of the valve body and the lower shell.
[0010] Preferably, the edge of the valve core is restricted inside the fixed plate and the baffle, and there is a gap between the outer sides of the valve core and the spring and the inner sides of the valve body and the lower shell.
[0011] Preferably, a connecting sleeve is connected to the bottom end of the upper shell. A fitting groove is provided at the top of the valve body corresponding to the connecting sleeve. A fitting hole is provided inside the lower shell. The bottom of the valve body is fitted and connected with the fitting hole through a connecting ring protrusion.
[0012] Preferably, the valve body and the upper shell are fitted and connected through the connecting sleeve and the fitting groove. The valve body and the lower shell are fitted and connected through the fitting hole and the connecting ring protrusion. And the joints between the valve body, the upper shell and the lower shell are all welded and connected by ultrasonic welding.
[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: The structure of the present utility model is scientific and reasonable, and it is safe and convenient to use:
[0014] 1. Through the fixed plate and the limiting hole provided at the top inside the upper shell, when the valve core penetrates into the valve body, the top of the valve core can be limited by the fixed plate and the limiting hole. At the same time, the baffle and the inner hole provided at the bottom inside the upper shell can limit the position of the middle part of the valve core, realizing the stable limiting installation of the valve core. At the same time, the swinging amplitude of the valve core inside the valve body can be effectively controlled, avoiding the phenomenon that the valve core swings under the action of air flow.
[0015] And by reducing the outer diameter size of the valve core and the inner diameter size of the spring, the overall diameter of the valve core and the spring is reduced, so that there is a certain gap between the valve core and the spring and the internal space of the lower shell. Thus, even if the valve core swings, it will not touch the inner wall of the lower shell. In this way, by limiting the position of the valve core and reducing the overall size of the valve core, the phenomenon that the valve core knocks on the inner wall of the lower shell due to swinging is avoided, so that the crankcase ventilation valve will not produce knocking abnormal noise during actual operation.
[0016] 2. When installing the baffle, the limiting posts can make the connection between the baffle and the inside of the upper housing close and stable, avoiding the phenomenon of the baffle loosening. At the same time, through the connecting sleeve and the fitting groove, when connecting the bottom of the upper housing and the top of the valve body, it is convenient for rapid and tight assembly between them, and the connection accuracy is ensured. At the same time, through the fitting holes and the connecting ring protrusions, the connection between the bottom of the valve body and the top of the lower housing is more stable when connecting, ensuring the tightness of the fitting connection between them. With ultrasonic welding, the valve body, the upper housing and the lower housing form an integral structure after connection, thereby strengthening the overall connection strength of the ventilation valve and ensuring its stable use. Description of the Drawings
[0017] The 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.
[0018] In the drawings:
[0019] Figure 1 is the structural schematic diagram of the present invention;
[0020] Figure 2 is the front view of the present invention;
[0021] Figure 3 is the cross-sectional schematic view of the present invention;
[0022] Figure 4 is the top view of the present invention;
[0023] Figure 5 is the bottom view of the present invention;
[0024] The reference numerals in the drawings: 1. Valve body; 2. Upper housing; 3. Lower housing; 4. Air inlet; 5. Spool; 6. Spring; 7. Baffle; 8. Inner hole; 9. Limiting post; 10. Fixed plate; 11. Rib block; 12. Connecting sleeve; 13. Fitting groove; 14. Fitting hole; 15. Connecting ring protrusion; 16. Limiting hole. Detailed Embodiment
[0025] The following describes the preferred embodiments of the present invention with reference to the drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention and are not used to limit the present invention.
[0026] Embodiment: As Figures 1-5As shown, the utility model provides a technical solution, a crankshaft ventilation valve abnormal noise reduction structure, comprising a valve body 1, the top of the valve body 1 is connected to an upper shell 2, and the bottom of the valve body 1 is connected to a lower shell 3, an air inlet 4 is opened at the bottom middle end of the lower shell 3, a spring 6 is embedded and connected to the inner side of the valve body 1 and the lower shell 3, a valve core 5 is fitted and sleeved on the inner side of the spring 6, and the valve core 5 is connected to the inner side of the valve body 1, the upper shell 2 and the lower shell 3;
[0027] The inner bottom of the upper shell 2 is embedded with a baffle 7, an inner hole 8 is provided on the inner side of the baffle 7, the valve core 5 is fitted and connected in the inner hole 8, and the edge of the baffle 7 is connected to the limiting column 9, the inner edge of the upper shell 2 is provided with a limiting hole, and the baffle 7 is fitted and connected with the limiting hole through the limiting column 9 on its edge, and the baffle 7 is interference fit with the inside of the upper shell 2, and the baffle 7 and the upper shell 2 form an integral structure, and the baffle 7 and the upper shell 2 can limit the position of the middle part of the valve core 5 through the baffle 7 and the inner hole 8 provided at the inner bottom of the upper shell 2, so as to realize the stable limiting installation of the valve core 5;
[0028] A fixing plate 10 is embedded in the top of the inner side of the upper shell 2, and the edge of the valve core 5 is limited to the inner side of the fixing plate 10 and the baffle 7, and a gap is set between the outer side of the valve core 5 and the spring 6 and the inner side of the valve body 1 and the lower shell 3, so that the valve core 5 will not touch the inner wall of the lower shell 3 even if it swings, and a limiting hole 16 is set inside the fixing plate 10, and the valve core 5 is fitted and connected in the limiting hole 16. The fixing plate 10 is pre-buried on the inner side of the upper shell 2 by injection molding, and the rib block 11 limits the end of the spring 6. The diameter of the valve core 5 is smaller than the inner diameter of the spring 6, and the outer diameter of the spring 6 is much smaller than the inner diameter of the valve body 1 and the lower shell 3. The top of the valve core 5 is limited by the fixing plate 10 and the limiting hole 16, and the bottom of the valve core 5 is provided with a rib block 11 at the position corresponding to the end of the spring 6.
[0029] A connecting sleeve 12 is connected to the bottom end of the upper shell 2, a fitting groove 13 is provided at the top end of the valve body 1 corresponding to the connecting sleeve 12, a fitting hole 14 is provided inside the lower shell 3, the bottom of the valve body 1 is fitted and connected with the fitting hole 14 through a connecting ring protrusion 15, the valve body 1 and the upper shell 2 are fitted and connected through the connecting sleeve 12 and the fitting groove 13, the valve body 1 and the lower shell 3 are fitted and connected through the fitting hole 14 and the connecting ring protrusion 15, and the connection between the valve body 1, the upper shell 2 and the lower shell 3 are welded and connected by ultrasonic welding, so that when the bottom of the upper shell 2 and the top of the valve body 1 are connected, it is convenient to quickly and tightly assemble them, and the accuracy of the connection between them is guaranteed. At the same time, the bottom of the valve body 1 and the top of the lower shell 3 are more stable when connected, so that the valve body 1, the upper shell 2 and the lower shell 3 form an integral structure after connection, thereby strengthening the overall connection strength of the ventilation valve.
[0030] Working principle and usage process of the present utility model: During the actual application of the structure for reducing abnormal noise of the crankcase ventilation valve, first, the fixing plate 10 is embedded inside the upper housing 2 for injection molding, and the concentricity between the limiting hole 16 inside the fixing plate 10 and the upper housing 2 is controlled. Then, the baffle 7 is placed inside the upper housing 2. The baffle 7 has an interference fit with the upper housing 2 through the limiting posts 9. The limiting posts 9 can make the connection between the baffle 7 and the upper housing 2 tight and stable when the baffle 7 is installed, preventing the baffle 7 from loosening and falling off, and forming a small integral body with the upper housing 2;
[0031] Then, the valve core 5 is passed through the spring 6, and the valve core 5 is inserted into the upper housing 2 from the valve body 1. At the same time, the valve core 5 passes through the inner hole 8 inside the baffle 7 and the limiting hole 16 inside the fixing plate 10. Then, the valve body 1, the upper housing 2, and the lower housing 3 are ultrasonically welded and connected to form an integral ventilation valve structure;
[0032] Through the connecting sleeve 12 and the fitting groove 13, the connection between the bottom of the upper housing 2 and the top of the valve body 1 is convenient for quick and tight assembly. At the same time, through the fitting hole 14 and the connecting ring protrusion 15, the connection between the bottom of the valve body 1 and the top of the lower housing 3 is more stable, ensuring the tightness of the fitting connection between them. The ultrasonic welding is used to form an integral structure among the valve body 1, the upper housing 2, and the lower housing 3, thereby strengthening the overall connection strength of the ventilation valve and ensuring its stable use;
[0033] During actual use, when the air flow enters the ventilation valve from the air inlet 4, through the fixing plate 10 and the limiting hole 16 at the top inside the upper housing 2, the top of the valve core 5 can be limited. The baffle 7 and the inner hole 8 at the bottom inside the upper housing 2 can limit the position of the middle part of the valve core 5, so that the swing amplitude of the valve core 5 inside the valve body 1 can be effectively controlled, preventing the valve core 5 from swinging under the action of the air flow;
[0034] Moreover, the outer diameter size of the valve core 5 and the inner diameter size of the spring 6 are reduced, so that there is a certain gap between the valve core 5 and the spring 6 and the internal space of the lower housing 3. Thus, even if the valve core 5 swings, it will not touch the inner wall of the lower housing 3. By limiting the position of the valve core 5 and reducing the overall size of the valve core 5, the phenomenon that the valve core 5 knocks on the inner wall of the lower housing 3 due to swinging is avoided, so that the crankcase ventilation valve will not produce knocking abnormal noise during actual operation.
[0035] Finally, it should be noted that the above are only preferred examples of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A crankshaft ventilation valve noise reduction structure, comprising a valve body (1), characterized in that: The top of the valve body (1) is connected to an upper shell (2), and the bottom of the valve body (1) is connected to a lower shell (3); an air inlet (4) is provided at the middle of the bottom of the lower shell (3); a spring (6) is embedded and connected to the inner sides of the valve body (1) and the lower shell (3); a valve core (5) is fitted and sleeved on the inner side of the spring (6); and the valve core (5) is connected to the inner sides of the valve body (1), the upper shell (2) and the lower shell (3); A baffle (7) is embedded in the inner bottom of the upper shell (2), an inner hole (8) is provided on the inner side of the baffle (7), the valve core (5) is fitted and connected in the inner hole (8), and a limiting column (9) is connected to the edge of the baffle (7); A fixing plate (10) is embedded and connected to the inner top of the upper shell (2), a limiting hole (16) is provided inside the fixing plate (10), the valve core (5) is fitted and connected in the limiting hole (16), and a rib block (11) is provided at the bottom end of the valve core (5) at a position corresponding to the end of the spring (6).
2. The crankshaft ventilation valve abnormal noise reduction structure according to claim 1, characterized in that: The inner side edge of the upper shell (2) is provided with a limiting hole, and the baffle (7) is connected to the limiting hole through a limiting column (9) on its edge, and the baffle (7) is interference-fitted with the interior of the upper shell (2), so that an integral structure is formed between the baffle (7) and the upper shell (2).
3. The crankshaft ventilation valve abnormal noise reduction structure according to claim 2, characterized in that: The fixing plate (10) is pre-embedded in the inner side of the upper shell (2) by injection molding, the rib block (11) limits the end of the spring (6), the diameter of the valve core (5) is smaller than the inner diameter of the spring (6), and the outer diameter of the spring (6) is much smaller than the inner diameters of the valve body (1) and the lower shell (3).
4. The crankshaft ventilation valve abnormal noise reduction structure according to claim 1, characterized in that: The edge of the valve core (5) is limited to the inner side of the fixed plate (10) and the baffle plate (7), and a gap is provided between the outer side of the valve core (5) and the spring (6) and the inner side of the valve body (1) and the lower shell (3).
5. The crankshaft ventilation valve abnormal noise reduction structure according to claim 1, characterized in that: The bottom end of the upper shell (2) is connected to a connecting sleeve (12), the top end of the valve body (1) is provided with a fitting groove (13) corresponding to the connecting sleeve (12), the interior of the lower shell (3) is provided with a fitting hole (14), and the bottom of the valve body (1) is fitted and connected with the fitting hole (14) via a connecting ring protrusion (15).
6. The crankshaft ventilation valve abnormal noise reduction structure according to claim 5, characterized in that: The valve body (1) and the upper shell (2) are connected in a fitting manner via a connecting sleeve (12) and a fitting groove (13), the valve body (1) and the lower shell (3) are connected in a fitting manner via a fitting hole (14) and a connecting ring protrusion (15), and the connections between the valve body (1), the upper shell (2) and the lower shell (3) are welded in a manner of ultrasonic welding.