Crankcase forced ventilation valve capable of reducing abnormal sound

Abstract

The utility model discloses a crankcase forced ventilation valve capable of reducing abnormal sound, which comprises an air inlet valve body and an air outlet valve body which are buckled and connected, a valve seat is clamped between the air inlet valve body and the air outlet valve body, a valve core cavity is formed between the air inlet valve body and the air outlet valve body, a valve core is arranged in the valve core cavity, and a stroke spring is sleeved on a core body of the valve core. The diameter of one end of the travel spring close to the air inlet is gradually reduced; the end, close to the air outlet, of the valve element penetrates through the valve seat hole and then is arranged in the air outlet valve body, a first sliding limiting assembly is arranged between the inner wall of the valve seat hole and the valve element, and a second sliding limiting assembly is arranged between the bottom of the valve element and the inner wall of the air inlet valve body. The two groups of sliding blocks are adopted, so that the bottom of the valve core and the core body can be kept stable with the air inlet valve body and the valve seat and cannot move randomly in a cavity, noise generated by collision is avoided, a right-angle structure of an inner hole of the air inlet is changed into a chamfer structure, air inlet resistance is relieved, the vortex phenomenon caused by a right-angle air inlet is eliminated, and the service life of the air inlet valve is prolonged. And the tsunami whistle of the product is canceled.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilation valves, in particular to a crankcase forced ventilation valve capable of reducing abnormal noise. Background Art

[0002] When the engine is working, the steam in the crankcase is sucked into the cylinder through the exhaust pipe and the one-way valve, and the fresh air enters the crankcase through the small air filter on the valve cover. The function of the one-way valve is to prevent the vacuum degree of the intake pipe from being too large when the engine is at low speed and low load, thereby sucking the oil out of the crankcase. When the engine is idling, the vacuum degree in the intake pipe is large, the one-way valve moves in the direction of the small spring, and the exhaust gas in the crankcase enters the intake pipe through the small hole on the valve; as the engine load increases, the vacuum degree of the intake pipe decreases, and the valve is pushed outward under the action of the spring force, and the ventilation volume gradually increases; when the engine is under heavy load, the valve is fully opened, and the ventilation volume is the largest, thus playing the role of renewing the air in the crankcase. However, when the car is idling, the vacuum in the intake pipe is large and the valve core is running. As the airflow flows inside the product, the valve core is driven to move around in the crankshaft ventilation valve cavity, causing the valve core to hit the inner wall of the crankshaft ventilation valve cavity, producing abnormal noise. In addition, the existing ventilation valve will produce a whistling sound when taking in air due to product design problems, which seriously affects the use effect of the ventilation valve. Utility Model Content

[0003] The utility model aims to provide a crankcase forced ventilation valve which can reduce abnormal noise and solve the above-mentioned problem.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The utility model discloses a crankcase forced ventilation valve capable of reducing abnormal noise, comprising an intake valve body and an outlet valve body which are connected in a buckled manner, a valve seat being sandwiched between the intake valve body and the outlet valve body, a valve core cavity being formed between the intake valve body and the outlet valve body, a valve core being provided in the valve core cavity, a stroke spring being sleeved on the core body of the valve core, the diameter of the stroke spring at one end close to the air inlet of the intake valve body gradually becoming smaller, so that the inner circle of the stroke spring is completely attached to the valve core; one end of the valve core close to the air outlet of the outlet valve body passes through the valve seat hole formed on the valve seat and is then placed inside the outlet valve body, a first sliding limit assembly is provided between the inner wall of the valve seat hole and the valve core, and a second sliding limit assembly is provided between the bottom of the valve core and the inner wall of the intake valve body.

[0006] Furthermore, the outermost side of the air inlet of the air inlet valve body is expanded and funnel-shaped.

[0007] Furthermore, the first sliding limit assembly includes two symmetrically arranged first sliding blocks fixed on the inner wall of the valve seat hole, a first sliding groove is opened on the outer wall of the valve core, and the first sliding block is slidably connected to the first sliding groove.

[0008] Furthermore, the second sliding limit assembly includes two second sliding blocks fixed on both ends of the bottom of the valve core, a second sliding groove is opened on the inner wall of the intake valve body, and the second sliding block is slidably connected to the second sliding groove.

[0009] Compared with the prior art, the beneficial technical effects of the utility model are:

[0010] The utility model adopts two sets of sliders, so that the bottom and core of the valve core can maintain stability between the air intake valve body and the valve seat, and will no longer move around in the cavity, thus avoiding noise caused by impact. The right-angle structure of the inner hole of the air intake port is changed to a chamfered structure, which alleviates the air intake resistance, eliminates the vortex phenomenon caused by the right-angle air intake port, and eliminates the product's whistle sound. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model will be further described below in conjunction with the accompanying drawings.

[0012] Figure 1 This is a cross-sectional view of a crankcase forced ventilation valve that can reduce abnormal noise according to the utility model;

[0013] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0014] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0015] Explanation of the accompanying drawings: 1. Inlet valve body; 2. Outlet valve body; 3. Valve seat; 4. Valve core chamber; 5. Valve core; 6. Travel spring; 7. Valve seat hole; 8. First slider; 9. First slide groove; 10. Second slider; 11. Second slide groove. DETAILED DESCRIPTION

[0016] like Figure 1-3 As shown, a crankcase forced ventilation valve capable of reducing abnormal noise comprises an intake valve body 1 and an outlet valve body 2 which are snap-fitted together, a valve seat 3 is sandwiched between the intake valve body 1 and the outlet valve body 2, a valve core cavity 4 is formed between the intake valve body 1 and the outlet valve body 2, a valve core 5 is arranged in the valve core cavity 4, a travel spring 6 is sleeved on the core body of the valve core 5, the diameter of the travel spring 6 at one end of the air inlet port close to the intake valve body 1 gradually decreases, so that the inner circle of the travel spring 6 is completely attached to the valve core 5, thereby ensuring the stability of the bottom of the valve core 5.

[0017] One end of the valve core 5 close to the gas outlet of the gas outlet valve body 2 passes through the valve seat hole 7 opened on the valve seat 3 and is then placed inside the gas outlet valve body 2 .

[0018] A first sliding limit assembly is provided between the inner wall of the valve seat hole 7 and the valve core 5, and the first sliding limit assembly includes two symmetrically arranged first sliding blocks 8 fixed on the inner wall of the valve seat hole 7, and a first sliding groove 9 is provided on the outer wall of the valve core 5. The first sliding limit assembly ensures the stability of the core body of the valve core 5 during movement, thereby preventing the valve core 5 from colliding with the inlet valve body 1 and the outlet valve body 2.

[0019] A second sliding limit assembly is provided between the bottom of the valve core 5 and the inner wall of the intake valve body 1, and the second sliding limit assembly includes two second sliders 10 fixed on the two ends of the bottom of the valve core 5. A second sliding groove 11 is provided on the inner wall of the intake valve body 1, and the second slider 10 is slidably connected to the second sliding groove 11. The second sliding limit assembly ensures the stability of the bottom of the valve core 5 during movement, thereby preventing the valve core 5 from colliding with the intake valve body 1.

[0020] The outermost side of the air inlet of the air inlet valve body 1 is expanded and funnel-shaped, and the right-angle structure of the inner hole of the air inlet is changed to a chamfered structure, which alleviates the air intake resistance, eliminates the vortex phenomenon caused by the right-angle air inlet, and eliminates the product whistling sound.

[0021] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A crankcase forced ventilation valve capable of reducing abnormal noise, characterized in that: The invention comprises an intake valve body (1) and an outlet valve body (2) which are connected by snapping, a valve seat (3) being sandwiched between the intake valve body (1) and the outlet valve body (2), a valve core cavity (4) being formed between the intake valve body (1) and the outlet valve body (2), a valve core (5) being arranged in the valve core cavity (4), a travel spring (6) being sleeved on the core body of the valve core (5), the diameter of the travel spring (6) gradually becoming smaller at one end of the intake port of the intake valve body (1), The inner ring of the travel spring (6) is completely attached to the valve core (5); one end of the valve core (5) close to the air outlet of the air outlet valve body (2) passes through the valve seat hole (7) provided on the valve seat (3) and is then placed inside the air outlet valve body (2); a first sliding limit assembly is provided between the inner wall of the valve seat hole (7) and the valve core (5); and a second sliding limit assembly is provided between the bottom of the valve core (5) and the inner wall of the air inlet valve body (1).

2. The crankcase forced ventilation valve capable of reducing abnormal noise according to claim 1, characterized in that: The outermost side of the air inlet of the air inlet valve body (1) is expanded and funnel-shaped.

3. The crankcase forced ventilation valve capable of reducing abnormal noise according to claim 1, characterized in that: The first sliding limit assembly comprises two symmetrically arranged first sliding blocks (8) fixed on the inner wall of the valve seat hole (7), a first sliding groove (9) is provided on the outer wall of the valve core (5), and the first sliding block (8) is slidably connected to the first sliding groove (9).

4. The crankcase forced ventilation valve capable of reducing abnormal noise according to claim 1, characterized in that: The second sliding limit assembly comprises two second sliding blocks (10) fixed on the two ends of the bottom of the valve core (5); a second sliding groove (11) is provided on the inner wall of the intake valve body (1); and the second sliding block (10) is slidably connected to the second sliding groove (11).

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