A rocker arm assembly

Abstract

This utility model discloses a rocker arm assembly, belonging to the field of valve rocker arm technology. The key technical points are: it includes an intake rocker arm, an exhaust rocker arm, and a rocker arm seat. Two rocker arm shafts are mounted on the rocker arm seat, passing through the intake rocker arm and exhaust rocker arm respectively, and rotating with the intake rocker arm and exhaust rocker arm respectively. An oil storage chamber is formed inside the hollow rocker arm shaft. Several strip-shaped oil guide grooves are formed on the opposing surfaces of the intake rocker arm and the rocker arm shaft, as well as on the opposing surfaces of the exhaust rocker arm and the rocker arm shaft. An annular oil guide groove is formed at the ends of both the intake and exhaust rocker arms. An oil outlet channel communicating with the oil storage chamber is formed on the rocker arm shaft, with the oil outlet end of the oil outlet channel facing the annular oil guide groove. Several strip-shaped oil guide grooves are connected to the annular oil guide groove. An oil injection hole is provided in the middle of the rocker arm shaft, communicating with the oil storage chamber. This rocker arm assembly can reduce friction and wear between the intake rocker arm, exhaust rocker arm, and rocker arm shaft.

Description

Technical Field

[0001] This utility model belongs to the field of valve rocker arm technology, and specifically relates to a rocker arm assembly. Background Technology

[0002] Currently, with the rapid development of the automotive industry, consumers have put forward more stringent requirements for the power performance and fuel economy of automobile engines. This has prompted the industry to continuously promote the optimization and upgrading of engine structure. Among them, the valve rocker arm assembly is a key component of the engine. However, if the intake rocker arm, exhaust rocker arm and rocker arm shaft cannot be evenly and sufficiently lubricated during the relative movement of the components, it is very easy to cause serious wear, thereby significantly shortening the service life of the intake rocker arm and exhaust rocker arm. Utility Model Content

[0003] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a rocker arm assembly. The technical problem to be solved by this utility model is: how to achieve uniform and sufficient lubrication between the intake rocker arm, the exhaust rocker arm, and the rocker arm shaft.

[0004] The above-mentioned technical objective of this utility model can be achieved through the following technical solution: a rocker arm assembly, including an intake rocker arm, an exhaust rocker arm, and a rocker arm seat. Two rocker arm shafts are mounted on the rocker arm seat, and the two rocker arm shafts pass through the intake rocker arm and the exhaust rocker arm respectively, and the two rocker arm shafts are rotatably engaged with the intake rocker arm and the exhaust rocker arm respectively. An oil storage cavity is formed in the hollow interior of the rocker arm shaft. A plurality of strip-shaped oil guide grooves are formed on the opposite surfaces of the intake rocker arm and the rocker arm shaft, and on the opposite surfaces of the exhaust rocker arm and the rocker arm shaft. An annular oil guide groove is formed at the end of the intake rocker arm and the end of the exhaust rocker arm. An oil outlet channel communicating with the oil storage cavity is formed on the rocker arm shaft, and the oil outlet end of the oil outlet channel is directly opposite the annular oil guide groove. The plurality of strip-shaped oil guide grooves are all connected to the annular oil guide groove. An oil injection hole is provided in the middle of the rocker arm shaft, and the oil injection hole is connected to the oil storage cavity.

[0005] In one of the rocker arm assemblies described above, a plurality of the strip-shaped oil guide grooves are opened along the axial direction of the rocker arm shaft, and the plurality of the strip-shaped oil guide grooves are evenly distributed along the circumference of the rocker arm shaft.

[0006] In one of the rocker arm assemblies described above, the oil outlet channel is spiral-shaped.

[0007] In one of the rocker arm assemblies described above, a cylindrical sponge is embedded in the oil outlet end of the oil outlet channel.

[0008] In one of the rocker arm assemblies described above, the cross-section of the annular oil guide groove is trapezoidal.

[0009] In one of the rocker arm assemblies described above, the rocker arm seat has a groove that matches the outer contour of the rocker arm shaft.

[0010] In one of the rocker arm assemblies described above, both rocker arm shafts are connected to the rocker arm base by bolts.

[0011] In one of the rocker arm assemblies described above, a one-way valve connector is internally threaded into the oil injection hole.

[0012] In one of the rocker arm assemblies described above, the bottom of the annular oil guide groove has a textured structure.

[0013] In summary, the beneficial effects of this utility model compared to the prior art are as follows:

[0014] During operation, as the intake rocker arm and exhaust rocker arm rotate, the lubricating oil in the oil reservoir flows out through the oil outlet channel and enters the annular oil guide groove. Subsequently, the lubricating oil in the annular oil guide groove is dispersed into each strip-shaped oil guide groove. Then, the lubricating oil flows under the guidance of the strip-shaped oil guide groove until a lubricating oil film is formed on the relative contact surface between the intake rocker arm, exhaust rocker arm and rocker arm shaft. This ensures that the intake rocker arm, exhaust rocker arm and rocker arm shaft receive uniform and sufficient lubrication, thereby reducing friction and wear between the intake rocker arm, exhaust rocker arm and rocker arm shaft, thus improving the reliability of the overall structure and extending its service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0016] Figure 2 This is a schematic diagram of the rocker arm seat in an embodiment;

[0017] Figure 3 This is a cross-sectional view of the exhaust rocker arm in the embodiment;

[0018] Figure 4 This is a schematic diagram of the rocker arm shaft in an embodiment;

[0019] Figure 5 This is a cross-sectional view of the rocker arm shaft in the embodiment.

[0020] Reference numerals in the attached drawings: 1. Intake rocker arm; 2. Exhaust rocker arm; 3. Rocker arm seat; 4. Rocker arm shaft; 5. Oil reservoir; 6. Strip-shaped oil guide groove; 7. Annular oil guide groove; 8. Oil outlet channel; 9. Oil injection hole; 10. Cylindrical sponge; 11. Groove; 12. Bolt; 13. One-way valve connector. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] A rocker arm assembly, such as Figures 1 to 5 As shown, it includes an intake rocker arm 1, an exhaust rocker arm 2, and a rocker arm base 3.

[0023] Two rocker arm shafts 4 are installed on the rocker arm base 3. The two rocker arm shafts 4 are spaced apart and are respectively inserted through the intake rocker arm 1 and the exhaust rocker arm 2. The two rocker arm shafts 4 are respectively rotated and engaged with the intake rocker arm 1 and the exhaust rocker arm 2.

[0024] In this embodiment, both rocker arm shafts 4 and rocker arm base 3 are connected by bolts 12, which not only ensures a stable connection between rocker arm base 3 and the two rocker arm shafts 4, but also facilitates disassembly and maintenance in the future.

[0025] The rocker arm seat 3 has a groove 11 that matches the outer contour of the rocker arm shaft 4. Firstly, when installing the rocker arm, the rocker arm shaft 4 is positioned by the groove 11, which can effectively ensure the stability of the rocker arm shaft 4. Moreover, since the groove 11 matches the outer contour of the rocker arm shaft 4, the contact area between the two is increased, which makes the load borne by the rocker arm shaft 4 more evenly distributed on the rocker arm seat 3, reducing local stress concentration and further improving the stability and reliability of the rocker arm shaft 4.

[0026] The rocker arm shaft 4 has a hollow interior forming an oil reservoir 5. An oil filling hole 9 is provided in the middle of the rocker arm shaft 4, which is connected to the oil reservoir 5. A one-way valve connector 13 is threaded into the oil filling hole 9. The direction of the lubricating oil is controlled by the one-way valve connector 13 to prevent backflow of the lubricating oil and to facilitate the replenishment of lubricating oil into the oil reservoir 5 later. Since the one-way valve connector 13 is threaded into the oil filling hole 9, when the lubricating oil needs to be changed, it is only necessary to remove it by turning the one-way valve connector 13 with external force to drain the old lubricating oil from the oil filling hole 9, thus avoiding contamination of the newly injected lubricating oil by the residual old lubricating oil.

[0027] Several strip-shaped oil guide grooves 6 are provided on the opposite surfaces of the intake rocker arm 1 and the rocker arm shaft 4, as well as on the opposite surfaces of the exhaust rocker arm 2 and the rocker arm shaft 4. Preferably, the several strip-shaped oil guide grooves 6 are provided along the axial direction of the rocker arm shaft 4, and the several strip-shaped oil guide grooves 6 are evenly distributed along the circumference of the rocker arm shaft 4.

[0028] Both the end of the intake rocker arm 1 and the end of the exhaust rocker arm 2 are provided with annular oil guide grooves 7. It should be noted that the annular oil guide grooves 7 are located at the end of the intake rocker arm 1 relative to the rocker arm shaft 4 and the end of the exhaust rocker arm 2 relative to the rocker arm shaft 4. The rocker arm shaft 4 is provided with an oil outlet channel 8 that is connected to the oil storage chamber 5. The oil outlet end of the oil outlet channel 8 is directly opposite the annular oil guide groove 7. Several strip-shaped oil guide grooves 6 are all connected to the annular oil guide groove 7.

[0029] It should be noted that during operation, as the intake rocker arm 1 and exhaust rocker arm 2 rotate, the lubricating oil in the oil storage chamber 5 flows out through the oil outlet channel 8 and enters the annular oil guide groove 7. Subsequently, the lubricating oil in the annular oil guide groove 7 is dispersed into each strip-shaped oil guide groove 6. Through the guiding effect of several strip-shaped oil guide grooves 6, the lubricating oil can be more evenly covered on the contact surface of the intake rocker arm 1, exhaust rocker arm 2 and rocker arm shaft 4. This ensures that the intake rocker arm 1, exhaust rocker arm 2 and rocker arm shaft 4 receive uniform and sufficient lubrication, avoiding local insufficient or excessive lubrication, and improving the lubrication effect. With the continuous lubrication of the lubricating oil, a lubricating oil film is formed on the relative contact surface of the intake rocker arm 1, exhaust rocker arm 2 and rocker arm shaft 4, thereby reducing the friction and wear between the intake rocker arm 1, exhaust rocker arm 2 and rocker arm shaft 4, thus improving the reliability of the overall structure and extending its service life.

[0030] In this embodiment, the cross-section of the annular oil guide groove 7 is trapezoidal, which ensures the structural stability of the annular oil guide groove 7. Moreover, since the side of the trapezoidal structure has a certain inclination angle, this angle can guide the lubricating oil to flow along the side, so that the lubricating oil can be distributed more smoothly and evenly to each strip oil guide groove 6, thereby improving the efficiency and uniformity of lubrication.

[0031] Furthermore, the bottom of the annular oil guide groove 7 has a textured structure (not shown in the figure). The textured structure is not specifically limited, but it increases the surface area of ​​the annular oil guide groove 7, allowing the lubricating oil to adhere better to the bottom of the annular oil guide groove 7. This allows the annular oil guide groove 7 to store more lubricating oil. During operation, even if there is a short-term fluctuation in the lubricating oil supply, the lubricating oil stored in the annular oil guide groove 7 can continuously provide lubrication between the intake rocker arm 1, the exhaust rocker arm 2, and the rocker arm shaft 4.

[0032] The oil outlet channel 8 is spiral-shaped, requiring the lubricating oil to pass through the oil outlet channel 8 for a longer time. This not only slows down the outflow speed of the lubricating oil, preventing oxidation in the air due to excessive outflow speed and accelerating the deterioration of the lubricating oil, but also avoids lubricating oil spraying due to sudden pressure changes. This makes the output of lubricating oil more stable and continuous, resulting in more stable and reliable lubrication between the intake rocker arm 1, the exhaust rocker arm 2, and the rocker arm shaft 4.

[0033] A cylindrical sponge 10 is embedded in the oil outlet end of the oil outlet channel 8. First, the cylindrical sponge 10 blocks the oil outlet end of the oil outlet channel 8 to prevent external debris and impurities from entering from the oil outlet end of the oil outlet channel 8. Although the cylindrical sponge 10 has a certain obstruction effect on the flow of lubricating oil, this obstruction is not a complete blockage. It only prevents the lubricating oil from flowing out quickly, ensuring that the lubricating oil can still flow out continuously and stably, providing reliable lubrication between the intake rocker arm 1, the exhaust rocker arm 2 and the rocker arm shaft 4. It should be noted that a cylindrical sponge 10 with an appropriate pore size should be selected to ensure that the lubricating oil can flow out smoothly and meet the lubrication requirements.

[0034] Furthermore, a retaining ring is provided inside the oil outlet end of the oil outlet channel 8. During installation, external force is used to deform the cylindrical sponge 10 and allow it to pass through the retaining ring. Then, the retaining ring blocks the cylindrical sponge 10, preventing it from detaching from the oil outlet channel 8.

[0035] The specific embodiments described herein are merely illustrative examples of the spirit of this utility model; those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or adopt similar methods to replace them, but without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A rocker arm assembly, comprising an intake rocker arm (1), an exhaust rocker arm (2), and a rocker arm base (3), characterized in that: Two rocker arm shafts (4) are mounted on the rocker arm base (3). The two rocker arm shafts (4) pass through the intake rocker arm (1) and the exhaust rocker arm (2) respectively, and the two rocker arm shafts (4) are rotatably engaged with the intake rocker arm (1) and the exhaust rocker arm (2) respectively. An oil storage cavity (5) is formed inside the hollow rocker arm shaft (4). Several strip-shaped grooves are formed on the opposite surfaces of the intake rocker arm (1) and the rocker arm shaft (4) and the opposite surfaces of the exhaust rocker arm (2) and the rocker arm shaft (4). An oil guide groove (6) is provided at the end of the intake rocker arm (1) and the end of the exhaust rocker arm (2). An oil outlet channel (8) connected to the oil storage chamber (5) is provided on the rocker arm shaft (4). The oil outlet end of the oil outlet channel (8) is directly opposite the annular oil guide groove (7). Several strip-shaped oil guide grooves (6) are connected to the annular oil guide groove (7). An oil injection hole (9) is provided in the middle of the rocker arm shaft (4). The oil injection hole (9) is connected to the oil storage chamber (5).

2. The rocker arm assembly according to claim 1, characterized in that: Several strip-shaped oil guide grooves (6) are opened along the axial direction of the rocker arm shaft (4), and several strip-shaped oil guide grooves (6) are evenly distributed along the circumference of the rocker arm shaft (4).

3. A rocker arm assembly according to any one of claims 1 or 2, characterized in that: The oil outlet channel (8) is spiral-shaped.

4. A rocker arm assembly according to claim 3, characterized in that: The oil outlet end of the oil outlet channel (8) is embedded with a cylindrical sponge (10).

5. A rocker arm assembly according to claim 4, characterized in that: The cross-section of the annular oil guide groove (7) is trapezoidal.

6. A rocker arm assembly according to claim 5, characterized in that: The rocker arm seat (3) has a groove (11) that matches the outer contour of the rocker arm shaft (4).

7. A rocker arm assembly according to claim 6, characterized in that: Both rocker arm shafts (4) are connected to the rocker arm seat (3) by bolts (12).

8. A rocker arm assembly according to claim 6, characterized in that: The oil injection hole (9) is internally threaded with a one-way valve connector (13).

9. A rocker arm assembly according to claim 5, characterized in that: The bottom of the annular oil guide groove (7) has a textured structure.

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