Engine rocker arm shaft

Abstract

The utility model discloses an engine rockshaft which is installed on a rockshaft seat of an engine and used for connecting rockers in series, the rockshaft comprises a shaft body, and the shaft body comprises a connecting section and an installing section. The connecting section comprises a top assembling face and a bottom positioning face, the middle of the shaft body is hollowed out to form a cavity, a supporting column is arranged in the cavity, the top of the supporting column is connected with the assembling face, and the bottom of the supporting column is connected with the positioning face. The rocker arm shaft has the advantages of being light in structural design weight, small in material consumption, low in cost, capable of guaranteeing absolute structural strength, not prone to deformation in long-time high-strength operation, and the service life of the rocker arm shaft is almost the same as that of a rocker arm shaft of a solid structure. According to the technical scheme, lubrication between the rocker arm and the rocker arm shaft can be guaranteed to the maximum extent through the design of the oil outlet holes, and friction loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an 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 the existing technical solutions, the rocker arm shaft is usually a solid structure or only a lubricating oil channel with a small diameter is machined in the center of the rocker arm shaft, and the rocker arm shaft is heavy. Therefore, it is necessary to develop an 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 utility model is to provide an engine rocker shaft, which solves one or more of the above-mentioned existing technical problems.

[0005] In order to solve the above technical problems, the present invention adopts a technical solution: an engine rocker shaft, the rocker shaft is installed on the rocker shaft seat of the engine for connecting the rocker arm in series, and its innovation lies in: the rocker shaft includes a shaft body, the shaft body includes a connecting section and a mounting section;

[0006] The connecting section includes an assembly surface at the top and a positioning surface at the bottom. The middle of the shaft body is hollowed out to form a cavity. A support column is provided in the cavity. The top of the support column is connected to the assembly surface, and the bottom is connected to the positioning surface.

[0007] The support column is provided with a threaded hole, which passes through the assembly surface and the positioning surface;

[0008] An oil inlet hole is provided on the assembly surface, and an oil outlet hole is provided on the installation section.

[0009] In some embodiments, there are no connecting segments at either end of the shaft body.

[0010] In some embodiments, all mounting surfaces lie in the same plane.

[0011] In some embodiments, the oil outlet hole includes a main hole and a secondary hole, the main hole and the secondary hole are on the same straight line, and the extension direction of the line between the main hole and the secondary hole is not on the same straight line as the opening direction of the oil inlet hole.

[0012] In some embodiments, the diameters of the main hole and the auxiliary hole are smaller than the diameter of the oil inlet hole.

[0013] The beneficial effects of the present invention are as follows: the structural design of the present technical solution is light in weight, uses less materials, and has low cost, while ensuring absolute structural strength. It is not easy to deform during long-term high-intensity operation, and its service life is almost the same as that of a rocker arm shaft with a solid structure; the design of the oil outlet hole in the present technical solution can maximize the lubrication between the rocker arm and the rocker arm shaft, reducing friction loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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:

[0015] Figure 1 It is an axial view of an engine rocker arm shaft of the utility model.

[0016] Figure 2 This is a front view of an engine rocker arm shaft of the utility model.

[0017] Figure 3 yes Figure 2 Cross-section view in the AA direction.

[0018] Figure 4 It is a side view of an engine rocker arm shaft of the utility model.

[0019] Figure 5 yes Figure 4 Cross-section view along the BB direction. 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 5As shown, the embodiment of the utility model includes: an 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 connecting section 100 and a mounting section 200; the connecting section 100 includes an assembly surface at the top and a positioning surface at the bottom, the middle part of the shaft body is hollowed out to form a cavity 300, a support column 400 is provided in the cavity 300, the top of the support column 400 is connected to the assembly surface, and the bottom is connected to the positioning surface; a threaded hole 401 is provided on the support column 400, and the threaded hole 401 passes through the assembly surface and the positioning surface; an oil inlet hole 500 is provided on the assembly surface, and an oil outlet hole is provided on the mounting section 200. In the above structure, the structure of the shaft body is integrally formed, except for the oil inlet hole 50 0 and the oil outlet hole, the cavity 300 is a closed structure. In this structure, the shaft body is actually a shell, and then a support column 400 is arranged inside it to improve the structural strength of the shaft body and avoid the loss of structural strength caused by hollowing out. At the same time, the structure of the support column 400 is used to process a threaded hole 401 thereon for connecting and fixing the shaft body to the engine. When designing the support column 400, the diameter of the threaded hole 401 should be taken into consideration to determine the diameter of the support column 400. After processing the threaded hole 401, the wall thickness of the support column 400 should be greater than 0.8mm, and the support column 400 will not affect the connectivity of the cavity 300. The wall thickness of the shaft body should also be greater than 0.8mm, and the specific thickness should be determined according to the length of the shaft body.

[0022] Specifically, both ends of the shaft body are connecting sections 100. In the above structure, both ends of the shaft body must be designed as connecting sections 100, which can ensure the stability of the shaft assembly shaft and ensure that the positions of the two ends of the shaft body are fixed when the engine rocker arm is in the working state, and no up and down displacement will occur, causing stroke deviation.

[0023] Specifically, all assembly surfaces are located on the same plane. In the above structure, assembly and installation are facilitated, and unnecessary assembly troubles are reduced.

[0024] Specifically, the oil outlet hole includes a main hole 601 and a secondary hole 602. The main hole 601 and the secondary hole 602 are on the same straight line, and the extension direction of the line between the main hole 601 and the secondary hole 602 is not on the same straight line as the opening direction of the oil inlet hole 500. In the above structure, the oil outlet hole is designed as a main hole 601 and a secondary hole 602 to ensure the oil output and the lubrication of the rocker arm on the rocker arm shaft. At the same time, the opening direction of the oil outlet hole and the oil inlet hole 500 are staggered to ensure that a stable amount of oil is filled in the cavity 300, thereby ensuring the oil output of the oil outlet hole.

[0025] 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. An engine rocker shaft, the rocker shaft being mounted on a rocker shaft seat of an engine for connecting rocker arms in series, characterized in that: The rocker arm shaft comprises a shaft body, and the shaft body comprises a connecting section (100) and a mounting section (200); The connecting section (100) comprises a top assembly surface and a bottom positioning surface, the middle portion of the shaft body is hollowed out to form a cavity (300), a support column (400) is provided in the cavity (300), the top of the support column (400) is connected to the assembly surface, and the bottom is connected to the positioning surface; The support column (400) is provided with a threaded hole (401), and the threaded hole (401) passes through the assembly surface and the positioning surface; An oil inlet hole (500) is provided on the assembly surface, and an oil outlet hole is provided on the installation section (200).

2. The engine rocker arm shaft according to claim 1, characterized in that: Both ends of the shaft body are connecting sections (100).

3. The engine rocker arm shaft according to claim 2, characterized in that: The length of the connecting sections (100) at both ends of the shaft body is half the length of the connecting section (100) in the middle of the shaft body.

4. The engine rocker arm shaft according to claim 2, characterized in that: The number of threaded holes (401) provided on the connecting section (100) in the middle of the shaft body is twice the number of threaded holes (401) provided on the connecting sections (100) at both ends of the shaft body.

5. The engine rocker arm shaft according to claim 1, characterized in that: All of the assembly surfaces are located in the same plane.

6. The engine rocker arm shaft according to claim 1, characterized in that: The oil outlet hole comprises a main hole (601) and an auxiliary hole (602), the main hole (601) and the auxiliary hole (602) are on the same straight line, and the extension direction of the line connecting the main hole (601) and the auxiliary hole (602) is not on the same straight line as the opening direction of the oil inlet hole (500).

7. The engine rocker arm shaft according to claim 6, characterized in that: The diameters of the main hole (601) and the auxiliary hole (602) are smaller than the diameter of the oil inlet hole (500).

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