Lightweight engine rocker arm shaft

Abstract

The utility model discloses a lightweight engine rocker arm shaft which is installed on a rocker arm shaft seat of an engine and used for being connected with a rocker arm in series, the rocker arm shaft comprises a shaft body, and the shaft body comprises an installation section used for sleeving the engine rocker arm and a connecting part used for fixed connection. The interior of the shaft body is hollowed to form an oil cavity, a connecting column is arranged in the oil cavity and located in the area of the connecting part of the shaft body, a connecting hole is formed in the connecting column and penetrates through the upper surface and the lower surface of the connecting part, and the connecting part and the mounting part are arranged at an interval; an oil groove is formed in the mounting part, an oil outlet hole is formed in the oil groove and communicated with the oil cavity, and an oil inlet hole is further formed in the mounting part and is not overlapped with the oil groove. The rocker arm shaft has the advantages that the rocker arm shaft is light enough due to the hollow design, the oil groove is designed, the friction surface between the rocker arm and the rocker arm shaft is reduced, contact between lubricating oil and the rocker arm is improved, and the lubricating effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine rocker shafts, in particular to a lightweight engine rocker shaft. Background Art

[0002] At present, for engines that do not use overhead camshafts to directly drive the valves, rocker shaft components are commonly used valve drive mechanisms. Rocker shaft components mainly include rocker arms, rocker shafts, rocker shaft seats and other parts. The main function of the rocker shaft is to support and position the rocker arm and provide a rocker arm lubricating oil channel to ensure the reliable operation of the rocker arm and other components.

[0003] However, in existing technical solutions, the rocker arm shaft is usually a solid structure or only has a small diameter lubricating oil channel in the center of the rocker arm shaft, which makes the rocker arm shaft heavy. Therefore, it is necessary to develop a lightweight engine rocker arm shaft. After searching, no technical solution similar to the present invention was found. Utility Model Content

[0004] The main technical problem solved by the present invention is to provide a lightweight engine rocker shaft, which solves one or more of the above-mentioned existing technical problems.

[0005] To solve the above technical problems, the present invention adopts a technical solution: a lightweight engine rocker arm shaft, which is mounted on a rocker arm shaft seat of an engine and is used to connect the rocker arms in series. The innovation of the rocker arm shaft is that the rocker arm shaft includes a shaft body, which includes a mounting section for fitting the engine rocker arm and a connecting portion for fixed connection.

[0006] The interior of the shaft body is hollowed out to form an oil chamber. A connecting column is provided in the oil chamber at the connecting portion of the shaft body. A connecting hole is provided on the connecting column. The connecting hole passes through the upper and lower surfaces of the connecting portion. The connecting portion and the mounting portion are spaced apart.

[0007] An oil groove is provided on the mounting portion, an oil outlet hole is provided in the oil groove, and the oil outlet hole is communicated with the oil cavity. An oil inlet hole is also provided on the mounting portion, and the oil inlet hole and the oil groove do not overlap.

[0008] In some embodiments, a ventilation groove is provided on the mounting portion at a side of the oil tank, and the ventilation groove is communicated with the side wall of the oil tank.

[0009] In some embodiments, the ventilation groove includes two groove sections arranged on both sides of the oil groove in a mirror-symmetrical manner.

[0010] In some embodiments, the upper edges of the openings of the vent grooves are all designed as curved surfaces.

[0011] In some embodiments, the upper surface of the connecting portion is planar.

[0012] In some embodiments, the oil inlet hole is provided on the top surface of the mounting portion and the direction of the oil inlet hole is perpendicular to the upper surface of the connecting portion.

[0013] In some embodiments, the oil outlet hole includes a main hole and a secondary hole, and a line connecting the main hole and the secondary hole is perpendicular to an opening direction of the oil inlet hole.

[0014] The beneficial effects of the present invention are as follows: the hollow design adopted in the present technical solution makes the rocker shaft sufficiently lightweight, and the oil groove is designed to reduce the friction surface between the rocker arm and the rocker shaft while increasing the contact between the lubricating oil and the rocker arm, thereby improving the lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0016] Figure 1 It is an axial view of a lightweight engine rocker shaft of the utility model.

[0017] Figure 2 It is a top view of a lightweight engine rocker arm shaft of the utility model.

[0018] Figure 3 yes Figure 2 Cross-section view in the AA direction.

[0019] Figure 4 yes Figure 1 A partial enlarged view of . DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1 to 4As shown, an embodiment of the utility model includes: a lightweight engine rocker arm shaft, the rocker arm shaft is installed on the rocker arm shaft seat of the engine for connecting the rocker arm in series, the rocker arm shaft includes a shaft body, the shaft body includes a mounting portion 200 for fitting the engine rocker arm and a connecting portion 100 for fixed connection; the interior of the shaft body is hollowed out to form an oil chamber 201, the shell thickness of the shaft body is not less than 10mm, if the length of the shaft body is greater than 2000mm, the thickness of the shaft body increases by 0.2mm for every increase of 100mm, thereby ensuring the overall strength of the shaft body, a connecting column 300 is provided in the oil chamber 201 in the area of ​​the connecting portion 100 of the shaft body, the connecting column 300 is provided with a connecting hole 301, the outer diameter of the connecting column 300 is at least 5mm larger than the inner diameter of the connecting hole 301, if the maximum diameter of the shaft body exceeds 100mm, then if it does not exceed 10mm, the outer diameter of the connecting column 300 increases by 0.1mm, and the connecting hole 301 penetrates The upper and lower surfaces of the connecting portion 100 are passed through. The connecting portion 100 and the mounting portion 200 are spaced apart, and both ends of the shaft body are connecting sections. The mounting portion 200 is provided with an oil groove 400. The cross section of the oil groove 400 is arc-shaped and has a maximum depth of 5mm and a width of 10mm. If the maximum shaft diameter of the shaft body is greater than 100mm, the width of the oil groove 400 increases by 1mm and the maximum depth increases by 0.2mm for every 10mm increase. The oil groove 400 is provided with an oil outlet hole 50. 2. The oil outlet hole 502 is connected to the oil chamber 201. The mounting portion 200 is further provided with an oil inlet hole 501. The oil inlet hole 501 does not overlap with the oil groove 400. In the above structure, during assembly, the rocker arm of the engine is mounted on the mounting portion 200 on the rocker arm shaft and covers the oil groove 400 thereunder. The lubricating oil enters the oil chamber 201 from the oil inlet hole 501 and then enters the oil groove 400 from the oil outlet hole 502. The lubricating oil in the oil groove 400 lubricates the rocker arm shaft, thereby reducing wear.

[0022] Specifically, a ventilation groove 401 is provided on the side of the oil groove 400 on the mounting portion 200, and the ventilation groove 401 is communicated with the side wall of the oil groove 400. The ventilation groove 401 in the above structure can prevent the air in the oil chamber 201 from being squeezed by the lubricating oil into the oil groove 400. Since the connection between the rocker arm and the rocker arm shaft is a secondary seal, air may remain in the oil groove 400, so that the hair conditioner cannot fill the oil groove 400, affecting the hair conditioner effect. The ventilation groove 401 can remove the air and also increase the circulation of the lubricating oil. At the same time, the upper edges of the ventilation grooves 401 in the present technical solution are chamfered into arcs to reduce friction loss between the rocker arm.

[0023] The ventilation groove 401 includes two groove sections that are mirror-symmetrically arranged on both sides of the oil groove 400, and the upper edges of the openings of the ventilation grooves 401 are both designed as curved surfaces.

[0024] Specifically, the upper surface of the connecting portion 100 is a plane, and the above structure facilitates the installation and fixation of the rocker arm shaft and facilitates assembly and positioning.

[0025] Specifically, the oil inlet hole 501 is arranged on the top surface of the mounting portion 200 and the direction of its opening is perpendicular to the upper surface of the connecting portion 100. In the above structure, the oil inlet hole 501 is located at the highest point of the shaft body, which can ensure that the lubricating oil can fill the oil cavity 201 and facilitate the oil outlet hole 502 to fill the oil tank 400.

[0026] Specifically, the oil outlet hole 502 includes a main hole and a secondary hole, and the connecting line between the main hole and the secondary hole is perpendicular to the opening direction of the oil inlet hole 501. In the above structure, the main hole and the secondary hole discharge oil at the same time, which can improve the circulation efficiency of the lubricating oil in the oil tank 400.

[0027] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lightweight engine rocker shaft, mounted on a rocker shaft seat of an engine for use in series with rocker arms, characterized in that: The rocker arm shaft comprises a shaft body, wherein the shaft body comprises a mounting portion (200) for fitting the engine rocker arm and a connecting portion (100) for fixed connection; The interior of the shaft body is hollowed out to form an oil cavity (201), a connecting column (300) is provided in the oil cavity (201) at the region of the connecting portion (100) of the shaft body, a connecting hole (301) is provided on the connecting column (300), and the connecting hole (301) passes through the upper and lower surfaces of the connecting portion (100), and the connecting portion (100) and the mounting portion (200) are spaced apart. An oil groove (400) is provided on the mounting portion (200), an oil outlet hole (502) is provided in the oil groove (400), and the oil outlet hole (502) is communicated with the oil cavity (201). An oil inlet hole (501) is also provided on the mounting portion (200), and the oil inlet hole (501) does not overlap with the oil groove (400).

2. The lightweight engine rocker arm shaft according to claim 1, characterized in that: A vent groove (401) is provided on the mounting portion (200) on the side of the oil groove (400), and the vent groove (401) is in communication with the side wall of the oil groove (400).

3. The lightweight engine rocker arm shaft according to claim 2, characterized in that: The ventilation groove (401) comprises two groove sections arranged on both sides of the oil groove (400) in a mirror-symmetrical manner.

4. The lightweight engine rocker arm shaft according to claim 2, characterized in that: The upper edges of the openings of the ventilation grooves (401) are all designed as curved surfaces.

5. The lightweight engine rocker arm shaft according to claim 1, characterized in that: The upper surface of the connecting portion (100) is a plane.

6. A lightweight engine rocker arm shaft according to claim 1 or 5, characterized in that: The oil inlet hole (501) is provided on the top surface of the mounting portion (200), and the direction of its opening is perpendicular to the upper surface of the connecting portion (100).

7. The lightweight engine rocker arm shaft according to claim 1, characterized in that: The oil outlet hole (502) comprises a main hole and a secondary hole, and a line connecting the main hole and the secondary hole is perpendicular to the opening direction of the oil inlet hole (501).

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