A split-type injection-molded engine breather

Abstract

This utility model relates to a split injection-molded engine breather, including a shell with an upper opening and a cover plate covering the shell. A connecting ring inserted into the shell is fixed to the bottom surface of the cover plate, and the outer diameter of the connecting ring is equal to the inner diameter of the shell. An exhaust pipe is connected to the cover plate. An air inlet is opened at the bottom of the shell. An oil baffle is also installed inside the shell covering the air inlet. Multiple oil baffle outlet slots are opened on the side of the oil baffle. Multiple metal nuts are embedded in the bottom surface of the shell. The high-pressure oil-gas mixture enters the space between the oil baffle and the shell through the air inlet, flows out through the oil baffle outlet slots on the side of the oil baffle, and then turns upwards and enters the exhaust pipe for discharge. The oil in the high-pressure oil-gas mixture is blocked by the oil baffle to achieve gas-liquid separation. In this utility model, each component is injection molded and then assembled into a finished product. The structure of each component is simple, easy to process, reduces processing costs, and improves processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of respirator technology, specifically to a split injection-molded engine respirator. Background Technology

[0002] The engine's breather is a key component in an internal combustion engine used to balance the pressure inside the crankcase and discharge exhaust gases. Its main function is to prevent excessively high or low crankcase pressure, while reducing oil contamination and emissions. Because engine oil easily evaporates at certain temperatures, high-pressure gases containing oil further exacerbate the pressure inside the crankcase. The breather separates the high-pressure oil-gas mixture, allowing the oil to return directly and the gas to escape, thus depressurizing the crankcase and maintaining the pressure balance inside and outside the engine's crankcase.

[0003] For example, the invention patent with publication number CN108167046A discloses a new type of diesel engine breather, and the utility model patent with publication number CN220059697U discloses an engine breather. The two breathers have the same function, but their structures are relatively complex, and the mold cost is high if they are injection molded. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a simple, low-cost, split-type injection-molded engine breather.

[0005] This utility model is achieved through the following technical solution: a split injection-molded engine breather is provided, including a shell with an upper opening and a cover plate covering the shell. A connecting ring inserted into the shell is fixed to the bottom surface of the cover plate. The outer diameter of the connecting ring is equal to the inner diameter of the shell. An exhaust pipe is connected to the cover plate. An air inlet is opened at the bottom of the shell. An oil baffle is also installed inside the shell covering the air inlet. Multiple oil baffle outlet grooves are opened on the side of the oil baffle. Multiple metal nuts are embedded in the bottom surface of the shell.

[0006] The high-pressure oil-gas mixture enters the space between the oil baffle and the housing through the air inlet in this design. After flowing out through the oil baffle outlet groove on the side of the oil baffle, it then turns upwards and enters the exhaust pipe for discharge. The oil in the high-pressure oil-gas mixture is blocked by the oil baffle, achieving gas-liquid separation. A connecting ring is inserted into the housing to connect the cover plate and the housing. The metal nut on the bottom of the housing allows for the installation of the breather.

[0007] As an optimization, an oil baffle positioning ring adapted to the oil baffle is fixed to the bottom surface inside the housing. The oil baffle positioning ring has multiple oil return grooves. The oil baffle positioning ring in this solution positions the oil baffle, preventing it from shifting and keeping it concentric with the housing. The oil return grooves facilitate the flow of oil outside the oil baffle positioning ring to the air intake.

[0008] As an optimization, a lower baffle ring is fixed to the bottom surface of the cover plate, and multiple baffle ring outlet grooves are opened on the side of the lower baffle ring. In this solution, the lower baffle ring restricts the upward movement of the oil baffle and increases the flow path length of the high-pressure oil-gas mixture, thereby improving the separation effect.

[0009] As an optimization, a groove is formed on the bottom surface of the housing, and the metal nut and air inlet are both located within the inner ring of the groove. The groove in this design is used to install a sealing strip, thereby achieving a seal at the air inlet and preventing leakage of the high-pressure oil-gas mixture.

[0010] As an optimization, the bottom surface of the housing has an upward protrusion, and the metal nut is disposed within the protrusion. The protrusion in this design facilitates the placement of the metal nut and increases its length.

[0011] As an optimization, the housing is cylindrical, and the cover plate is circular, which facilitates injection molding.

[0012] As an optimization, three metal nuts are provided and evenly distributed around the air inlet. This allows for circumferential adjustment and installation of the respirator.

[0013] The beneficial effects of this utility model are as follows: The modular injection-molded engine breather of this utility model has various parts that are injection molded and then assembled into a finished product. The structure of each part is simple and easy to process, which reduces processing costs and improves processing efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is an exploded view of the present invention;

[0016] Figure 3 This is an exploded view of the present invention from another angle;

[0017] Figure 4 This is a front view of the present invention;

[0018] Figure 5 For the present utility model Figure 4 Sectional view of plane AA;

[0019] Figure 6 This is a schematic diagram of the structure of the cover plate of this utility model;

[0020] Figure 7 This is a schematic diagram of the structure of the oil baffle of this utility model;

[0021] Figure 8 This is a top view of the casing of this utility model;

[0022] Figure 9 This utility model Figure 8 Sectional view of the middle BB surface;

[0023] Figure 10 This is a schematic diagram of the structure of the shell of this utility model;

[0024] As shown in the figure:

[0025] 1. Housing, 2. Oil baffle, 3. Cover plate, 4. Exhaust pipe, 5. Air inlet, 6. Metal nut, 7. Rubber groove, 8. Protrusion, 9. Oil baffle outlet groove, 10. Oil baffle positioning ring, 11. Oil return groove, 12. Lower retaining ring, 13. Retaining ring outlet groove, 14. Connecting ring. Detailed Implementation

[0026] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0027] like Figures 1-10 As shown, the present invention provides a split injection-molded engine breather, which includes a shell 1 with an upper opening, a cover plate 3 covering the shell 1, and an oil baffle 2 located inside the shell 1. The shell 1, the cover plate 3, and the oil baffle 2 are all injection molded and then assembled into a breather.

[0028] like Figure 2 As shown, the housing 1 is a cylindrical housing, which is circular in top view. The bottom surface of the housing 1 is flat, and the cover plate 3 is a circular plate. To achieve the connection between the cover plate 3 and the housing 1, a connecting ring 14 is fixedly attached to the bottom surface of the cover plate 3 and inserted into the housing 1. The connecting ring 14 and the cover plate 3 are integrally injection molded. The outer diameter of the connecting ring 14 is equal to the inner diameter of the housing 1. Therefore, after the connecting ring 14 is inserted into the housing 1, the connection between the cover plate 3 and the housing 1 can be achieved. To prevent separation, a barb is provided on the outer ring of the connecting ring 14, and an anti-detachment groove is provided on the inner ring of the housing 1. After installation, the barb enters the anti-detachment groove, thereby preventing the cover plate 3 and the housing 1 from separating.

[0029] The cover plate 3 is connected to an exhaust pipe 4, which is an L-shaped pipe that extends first in the line and then horizontally for the exhaust of gas. In this embodiment, the exhaust pipe 4 and the cover plate 3 are integrally injection molded.

[0030] The bottom of the housing 1 has an air inlet 5, which is located at the center of the housing 1 and is used for the entry of high-pressure oil-gas mixture.

[0031] The structure of the oil baffle 2 is as follows Figure 7As shown, it is a cylindrical cover with a bottom opening and a flat top surface. The oil baffle 2 covers the air inlet 5. The oil baffle 2 has multiple oil baffle outlet grooves 9 on its side to facilitate the discharge of the high-pressure oil-gas mixture from the air inlet 5. In order to improve the gas-liquid separation effect, multiple vertical strip-shaped protrusions are provided on both the inner and outer rings of the oil baffle 2, thereby increasing the contact area with the high-pressure oil-gas mixture and improving the separation effect.

[0032] An oil baffle positioning ring 10 adapted to the oil baffle 2 is fixed to the bottom surface inside the housing 1. The outer diameter of the oil baffle positioning ring 10 is slightly smaller than the inner diameter of the oil baffle 2, which plays a positioning role for the oil baffle 2, so that the oil baffle 2 maintains the coaxial effect with the housing 1.

[0033] like Figure 10 As shown, the oil baffle positioning ring 10 has multiple oil return grooves 11. This facilitates the flow of oil from the outside of the oil baffle positioning ring to the air intake.

[0034] The bottom surface of the cover plate 3 is fixed with a lower retaining ring 12. The lower retaining ring 12 and the cover plate 3 are integrally injection molded. After the lower retaining ring 12 is set, the upward movement of the oil baffle 2 is restricted, preventing the oil baffle 2 from separating from the oil baffle positioning ring 10. At the same time, the flow path length of the high-pressure oil-gas mixture is increased, thereby improving the separation effect.

[0035] The lower baffle ring 12 has multiple baffle ring outlet grooves 13 on its side, which facilitates the gas to enter the inner ring of the lower baffle ring 12 and then enter the exhaust pipe 4. Both the inner and outer rings of the lower baffle ring 12 are provided with multiple vertical strip-shaped protrusions, thereby increasing the contact area with the high-pressure oil-gas mixture and improving the separation effect.

[0036] The bottom surface of the housing 1 is fitted with multiple metal nuts 6, and the bottom surface of the housing 1 has an upward protrusion 8. The metal nuts 6 are disposed within the protrusion 8, thereby facilitating the installation of the respirator. In this embodiment, three metal nuts 6 are provided and are evenly distributed around the air inlet 5.

[0037] A groove 7 is formed on the bottom surface of the housing 1, and the metal nut 6 and the air inlet 5 are both located within the groove 7. The groove is used to install a sealing strip, thereby achieving a seal at the air inlet and preventing leakage of the high-pressure oil-gas mixture.

[0038] How to use this utility model:

[0039] After assembly, when installing the breather, first install the sealing strip in the rubber groove 7, attach the bottom surface of the housing 1 to the engine, and fix it in place by screwing it into the metal nut 6. Then connect the exhaust pipe 4 to the exhaust pipeline.

[0040] The high-pressure oil-gas mixture enters the space between the oil baffle and the housing through the air inlet. After flowing out through the oil baffle outlet groove on the side of the oil baffle, it turns upward and passes through the outlet groove 13 on the side of the lower baffle ring 12 and enters the exhaust pipe 4 for discharge. The oil in the high-pressure oil-gas mixture is blocked by the oil baffle and the lower baffle ring 12 to achieve gas-liquid separation. The oil flows back from the air inlet to the crankcase.

[0041] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A split-type injection-molded engine breather, characterized in that: The housing includes an open-top shell (1) and a cover plate (3) covering the shell (1). A connecting ring (14) is fixed to the bottom surface of the cover plate (3) and inserted into the shell (1). The outer diameter of the connecting ring (14) is equal to the inner diameter of the shell (1). An exhaust pipe (4) is connected to the cover plate (3). An air inlet (5) is opened at the bottom of the shell (1). An oil baffle (2) covering the air inlet (5) is also installed inside the shell (1). Multiple oil baffle outlet grooves (9) are opened on the side of the oil baffle (2). Multiple metal nuts (6) are embedded on the bottom surface of the shell (1).

2. The split-type injection-molded engine breather according to claim 1, characterized in that: An oil baffle positioning ring (10) adapted to the oil baffle (2) is fixed to the bottom surface inside the housing (1). The oil baffle positioning ring (10) has multiple oil return grooves (11).

3. A split-type injection-molded engine breather according to claim 1, characterized in that: The bottom surface of the cover plate (3) is fixed with a lower retaining ring (12), and the side of the lower retaining ring (12) has multiple retaining ring outlet grooves (13).

4. A split-type injection-molded engine breather according to claim 1, characterized in that: The bottom surface of the housing (1) has a ring of rubber groove (7), and the metal nut (6) and the air inlet (5) are both located in the inner ring of the rubber groove (7).

5. A split-type injection-molded engine breather according to claim 1, characterized in that: The bottom surface of the housing (1) is provided with an upward protrusion (8), and the metal nut (6) is disposed inside the protrusion (8).

6. A split-type injection-molded engine breather according to claim 1, characterized in that: The shell (1) is a cylindrical shell, and the cover plate (3) is a circular plate.

7. A split-type injection-molded engine breather according to claim 1, characterized in that: The metal nuts (6) are provided in three parts and are evenly distributed around the air inlet (5).

Images