Gear shaft with reduced cavitation in gear bushing

Abstract

The utility model discloses a kind of gear shafts for reducing gear bushing cavitation, it is related to engine technical field, including gear shaft body, oil inlet passage is provided on the end face of gear shaft body one end, annular oil gallery is provided in the circumferential direction to gear shaft body side surface, radial oil gallery is provided on the both sides of annular oil gallery, and radial oil gallery is communicated with oil inlet passage, oil return exhaust passage is provided on the end face of gear shaft body other end, and oil return exhaust passage is communicated with annular oil gallery by oil return connection oil hole.The utility model proposes a kind of gear shafts for reducing gear bushing cavitation, by setting oil return exhaust structure, so that gas in engine oil can be discharged along lubricating oil via oil return exhaust passage, avoid in gear bushing lubrication area accumulation formation high pressure, significantly reduce gear bushing cavitation risk, effectively protect gear bushing surface integrity, prolong its service life.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and more specifically, to a gear shaft that reduces gear bushing cavitation. Background Technology

[0002] In engine gear shaft transmission systems, gear bushings rely on lubricating oil for lubrication and heat dissipation to ensure their normal operation. Traditional gear shaft lubrication structures typically involve oil entering from the center of the gear shaft, connected to a radial oil passage perpendicular to the axis, thus lubricating the gear bushings.

[0003] However, in actual operation, it has been found that because engine oil itself contains dissolved gases (such as air, which may be introduced during oil storage and transportation, or released due to oil agitation and pressure changes), and the radial oil passages and lubrication areas are relatively enclosed, these gases move with the lubricating oil when it flows. However, due to the lack of a dedicated venting channel in the original structure, these gases easily accumulate in the gap between the gear bushing and the gear shaft, and at the ends of the radial oil passages. Furthermore, as the gear shaft rotates, the pressure in the lubrication area changes, compressing the accumulated gas and creating localized high pressure. When the pressure reaches a certain level, these gases rapidly release energy, impacting the surface of the gear bushing and causing fatigue damage to the bushing material, leading to pitting, cavitation damage, and other defects. Simultaneously, the high-pressure environment also disrupts the stability of the lubricating oil film, exacerbating bushing wear and further affecting the normal operation of the transmission system. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model proposes a gear shaft that reduces gear bushing cavitation. By setting up an oil return and exhaust structure, the gas in the oil can be discharged with the lubricating oil through the oil return and exhaust channel, avoiding the accumulation of high pressure in the lubrication area of ​​the gear bushing, significantly reducing the risk of gear bushing cavitation, effectively protecting the surface integrity of the gear bushing, and extending its service life.

[0005] To achieve this objective, the present invention adopts the following technical solution: This utility model provides a gear shaft for reducing gear bushing cavitation, including a gear shaft body, an oil inlet channel provided on the end face of one end of the gear shaft body, an annular oil passage provided on the side of the gear shaft body along the circumference, radial oil passages provided on both sides of the annular oil passage and connected to the oil inlet channel, and an oil return and exhaust channel provided on the end face of the other end of the gear shaft body, which is connected to the annular oil passage through an oil return connecting hole.

[0006] In a preferred embodiment of this invention, the central axis of the oil inlet channel coincides with the central axis of the gear shaft body.

[0007] In a preferred embodiment of this invention, there are two or more oil return and exhaust channels, and these two or more oil return and exhaust channels are evenly arranged circumferentially around the central axis of the gear shaft body.

[0008] In a preferred embodiment of this invention, the radial oil passage and the return oil connection hole are arranged equidistantly and alternately along the circumference of the gear shaft body.

[0009] The beneficial effects of this utility model are as follows: 1. The present invention proposes a gear shaft for reducing gear bushing cavitation. By setting an oil return and exhaust structure, the gas in the oil can be discharged with the lubricating oil through the oil return and exhaust channel, avoiding the accumulation of high pressure in the lubrication area of ​​the gear bushing, significantly reducing the risk of gear bushing cavitation, effectively protecting the surface integrity of the gear bushing, and extending its service life.

[0010] 2. In this utility model, the oil return and exhaust structure not only assists in exhaust but also optimizes the circulation path of the lubricating oil, making the lubricating oil return smoother. It can promptly remove the heat generated by the gear bushing during operation, improve the lubrication and heat dissipation effect, and further ensure the stable operation of the gear bushing and the entire transmission system.

[0011] 3. In this utility model, the oil return and exhaust structure is designed simply. It only requires the addition of a circumferential annular oil passage, an oil return connection hole, and an axial oil return and exhaust channel on the basis of the original gear shaft structure. The processing difficulty is low, the impact on the overall strength of the gear shaft is small, and it is easy to implement and promote in the existing production process without major changes to the production equipment and process. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a gear shaft for reducing gear bushing cavitation, provided by a specific embodiment of this utility model.

[0013] 1. Gear shaft body; 2. Oil inlet channel; 3. Radial oil passage; 4. Annular oil passage; 5. Oil return connection hole; 6. Oil return venting channel. Detailed Implementation

[0014] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0015] like Figure 1As shown, this embodiment provides a gear shaft for reducing gear bushing cavitation, including a gear shaft body 1. An oil inlet channel 2 is provided on the end face of one end of the gear shaft body 1. An annular oil passage 4 is provided circumferentially on the side of the gear shaft body 1. Radial oil passages 3 are provided on both sides of the annular oil passage 4 and are connected to the oil inlet channel 2. An oil return and exhaust channel 6 is provided on the end face of the other end of the gear shaft body 1, and the oil return and exhaust channel 6 is connected to the annular oil passage 4 through an oil return connection hole 5. In this embodiment, the oil inlet channel 2 is arranged along the axial direction of the gear shaft body 1 and serves as the gear oil inlet channel. The radial oil passages 3 are arranged perpendicular to the axial direction of the gear shaft body 1, realizing the delivery of oil from the oil inlet channel 2 to the gear bushing lubrication area, thereby achieving basic lubrication function. The annular oil passage 4, the return oil connection hole 5, and the return oil exhaust channel 6 constitute the return oil exhaust structure, allowing gas in the oil to be discharged along with the lubricating oil through the return oil exhaust channel 6. This prevents the accumulation of high pressure in the gear bushing lubrication area, significantly reducing the risk of gear bushing cavitation, effectively protecting the surface integrity of the gear bushing, and extending its service life. The annular oil passage 4 is arranged along the circumference of the gear shaft body 1, realizing the transportation of oil in the circumferential direction of the gear shaft, delivering the oil to the gear bushing lubrication area at various points around the circumference. The return oil connection hole 5 is arranged perpendicular to the axis of the gear shaft body 1, realizing the transportation of oil from the annular oil passage 4 to the return oil exhaust channel 6. The return oil exhaust channel 6 is used for oil return and to discharge the gas released from the oil, preventing gas accumulation. In addition, all components used in this embodiment are commercially available.

[0016] Specifically, the central axis of the oil inlet channel 2 coincides with the central axis of the gear shaft body 1.

[0017] Specifically, there are two or more oil return and exhaust channels 6, and these two or more oil return and exhaust channels 6 are evenly arranged circumferentially around the central axis of the gear shaft body 1. In this embodiment, two oil return and exhaust channels 6 are provided.

[0018] Specifically, there are two or more radial oil passages 3 and return oil connection holes 5. The radial oil passages 3 and return oil connection holes 5 are arranged equidistantly and alternately along the circumference of the gear shaft body 1. In this embodiment, there are a total of 4 radial oil passages 3 and 2 return oil connection holes 5. In addition, there is a return oil connection hole 5 between each two adjacent radial oil passages 3 along the circumference of the gear shaft body 1.

[0019] This utility model has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. This utility model is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are all within the protection scope of this utility model.

Claims

1. A gear shaft for reducing gear bushing cavitation, characterized in that: The gear shaft body (1) includes an oil inlet channel (2) on one end face of the gear shaft body (1), an annular oil passage (4) on the side of the gear shaft body (1) along the circumference, and radial oil passages (3) on both sides of the annular oil passage (4), and the radial oil passages (3) are connected to the oil inlet channel (2). An oil return and exhaust channel (6) is provided on the other end face of the gear shaft body (1), and the oil return and exhaust channel (6) is connected to the annular oil passage (4) through the oil return connection hole (5).

2. The gear shaft for reducing gear bushing cavitation according to claim 1, characterized in that: The central axis of the oil inlet channel (2) coincides with the central axis of the gear shaft body (1).

3. A gear shaft for reducing gear bushing cavitation according to claim 1, characterized in that: There are two or more oil return and exhaust channels (6), and the two or more oil return and exhaust channels (6) are evenly arranged around the central axis of the gear shaft body (1).

4. A gear shaft for reducing gear bushing cavitation according to claim 1, characterized in that: The radial oil passage (3) and the return oil connection hole (5) are arranged equidistantly along the circumference of the gear shaft body (1).

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