A transmission assembly capable of preventing oil leakage of an air vent plug

Abstract

The utility model discloses a kind of air-vent plug oil seepage oil leakage's transmission assembly, it is related to transmission technical field, including the rear shell and front shell of transmission, rear shell and front shell are fixed by bolt assembly assembly, the driving gear assembly and driven gear assembly of being engaged are set in rear shell and front shell, rear shell and front shell form air passage after assembly, the middle section of air passage is provided with lubricating oil and gas inlet, the upper end of air passage is provided with gas outlet, lower end is provided with lubricating oil backflow port, gas outlet is connected with air-vent plug. The transmission assembly of the utility model is through the air-vent structure of air passage, cooperate the synergistic effect of oil baffle and flow guide rib, can effectively block lubricating oil into upper region of air passage, and guide lubricating oil to flow back through lubricating oil backflow channel quickly, greatly improve oil-gas separation efficiency, completely avoid air-vent plug oil seepage or oil leakage failure under limit working condition, ensure the smooth progress of bench test and whole car road test.

Description

Technical Field

[0001] This utility model relates to the field of transmission technology, specifically to a transmission assembly that prevents oil leakage from the breather plug. Background Technology

[0002] In the development and testing of automotive transmission assemblies or reducer assemblies, the design of the transmission assembly's ventilation system directly affects its reliability in bench tests and vehicle road tests. Currently, traditional transmission assemblies mostly use a single-channel structure for their ventilation channels, which can only achieve basic exhaust functions, but neglect the coordinated design of oil-gas separation efficiency and lubricating oil return effect.

[0003] Under various extreme conditions during bench testing or vehicle road testing, such as high-speed operation, frequent starts and stops, and bumpy road conditions, the driving and driven gear assemblies inside the transmission violently agitate the lubricating oil, causing it to mix thoroughly with air to form an oil-air mixture. Because traditional venting systems lack an effective oil-air separation structure, this mixture flows directly towards the vent, and some lubricating oil easily overflows from the vent plug along with the gas, leading to oil seepage or leakage.

[0004] Meanwhile, traditional venting systems are not optimized for lubricant return. Even if some lubricant does not overflow, it is difficult for it to return quickly and smoothly to the transmission. Instead, it accumulates in the venting system, further increasing the risk of breather plug leakage. Such malfunctions not only contaminate testing equipment and affect the accuracy of test data, but may also lead to insufficient lubricant levels inside the transmission, accelerating wear on gears and other components, shortening the transmission's lifespan, and in severe cases, even causing test interruptions, increasing development costs and timelines. Therefore, there is an urgent need for a transmission assembly structure that can effectively solve the problem of breather plug leakage and is suitable for extreme operating condition testing. Utility Model Content

[0005] 1. The technical problem to be solved by the utility model: The purpose of this invention is to provide a transmission assembly that prevents oil leakage from the breather plug, in order to solve the problems currently found in the market as described in the background.

[0006] 2. Technical Solution: To achieve the above objectives, this utility model provides the following technical solution: a transmission assembly for preventing oil leakage from the breather plug, comprising a rear housing and a front housing of the transmission, the rear housing and the front housing being assembled and fixed by bolt assemblies, the rear housing and the front housing being provided with a meshing drive gear assembly and a driven gear assembly, the rear housing and the front housing forming a vent after assembly, the middle section of the vent is provided with a lubricating oil and gas inlet, the upper end of the vent is provided with a gas outlet, the lower end is provided with a lubricating oil return port, and the gas outlet is connected to the breather plug.

[0007] Furthermore, a second vent is provided at one end of the rear housing near the front housing, and an exhaust port is provided at the upper end of the second vent. The exhaust port is connected to a vent plug, and an inlet is provided in the middle section of the second vent. The inlet is used for lubricating oil and gas to enter the second vent.

[0008] Furthermore, a vent is provided at one end of the front housing near the rear housing, and a guide rib is provided at the lower end of the vent. The guide rib and the front housing form a lubricating oil return channel.

[0009] Furthermore, the second ventilation channel and the first ventilation channel are combined to form a ventilation channel.

[0010] Furthermore, the lower end of the second vent is provided with an oil baffle rib, which corresponds to the guide rib, and the extension direction of the oil baffle rib is adapted to the extension direction of the guide rib.

[0011] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects: (1) Efficiently solve the problem of oil seepage and leakage: The transmission assembly has a composite ventilation structure formed by the combination of ventilation channel one and ventilation channel two. With the synergistic effect of oil baffle and guide rib, it can effectively block lubricating oil from entering the upper area of ​​the ventilation channel and guide the lubricating oil to flow back quickly through the lubricating oil return channel, which greatly improves the oil-gas separation efficiency and completely avoids the failure of oil seepage or leakage of the ventilation plug under extreme working conditions, ensuring the smooth progress of bench tests and vehicle road tests.

[0012] (2) Simple structure and high reliability: The overall structure only optimizes the ventilation channel design of the front and rear housings, adds guide ribs, oil baffles and lubricating oil return channels, without the need to add complex separation devices. This not only reduces manufacturing costs, but also facilitates assembly and maintenance. At the same time, it is compatible with the existing production process of transmission assemblies and can achieve mass production.

[0013] (3) Ensure the service life of the transmission: The smooth lubricating oil return design ensures that there is always a sufficient amount of lubricating oil inside the transmission, avoiding the problem of increased gear wear caused by lubricating oil loss; at the same time, the stable exhaust function can balance the internal pressure of the transmission, reduce the extra load on the components, and effectively extend the service life of the transmission assembly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3This is a schematic diagram of the internal structure of the front housing of this utility model; Figure 4 This is a schematic diagram of the internal structure of the rear shell of this utility model; Figure 5 This is a schematic diagram of the rear shell of this utility model; Figure 6 This is a schematic diagram of the exhaust port structure of this utility model; Figure 7 This is a schematic diagram of the working process inside the rear housing of this utility model; Figure 8 This is a schematic diagram of the working process inside the front housing of this utility model; Figure 9 This is a schematic diagram showing the rotation direction of the rotating component of this utility model.

[0015] In the diagram: 1. Vent plug; 2. Rear housing; 3. Front housing; 4. Drive gear assembly; 5. Driven gear assembly; 6. Vent duct one; 61. Guide rib; 62. Lubricating oil return channel; 7. Vent duct two; 71. Exhaust port; 72. Inlet; 73. Oil baffle rib. Detailed Implementation

[0016] To facilitate understanding of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0020] Please see Figure 1-9 A transmission assembly for preventing oil leakage from a breather plug includes a rear housing 2 and a front housing 3 of the transmission. The rear housing 2 and the front housing 3 are assembled and fixed by bolt assemblies. The rear housing 2 and the front housing 3 are provided with a meshing drive gear assembly 4 and a driven gear assembly 5. After the rear housing 2 and the front housing 3 are assembled, a vent is formed. The middle section of the vent is provided with a lubricating oil and gas inlet, the upper end of the vent is provided with a gas outlet, and the lower end is provided with a lubricating oil return port. The gas outlet is connected to the breather plug 1.

[0021] A second vent 7 is provided at one end of the rear housing 2 near the front housing 3. An exhaust port 71 is provided at the upper end of the second vent 7, which is connected to a vent plug 1. An inlet 72 is provided in the middle section of the second vent 7, allowing lubricating oil and gas to enter the second vent 7. A first vent 6 is provided at one end of the front housing 3 near the rear housing 2. A guide rib 61 is provided at the lower end of the first vent 6, forming a lubricating oil return channel 62 between the guide rib 61 and the front housing 3. The second vent 7 and the first vent 6 are combined to form a vent 7. An oil baffle rib 73 is provided at the lower end of the second vent 7, corresponding to the guide rib 61, with the extension direction of the oil baffle rib 73 matching the extension direction of the guide rib 61.

[0022] Working principle: This transmission assembly achieves efficient oil-gas separation and smooth lubricating oil return by optimizing the ventilation system structure. The specific working process is as follows: Structural assembly basics: First, install the meshing drive gear assembly 4 and driven gear assembly 5 inside the front housing 3, and then assemble and fix the rear housing 2 and the front housing 3 with bolt assemblies; at this time, the second ventilation channel 7 opened on the rear housing 2 and the first ventilation channel 6 opened on the front housing 3 are precisely connected and merged to form a complete ventilation channel. At the same time, the exhaust port 71 of the second ventilation channel 7 is connected to the ventilation plug 1 to complete the overall assembly.

[0023] Oil-gas mixture generation and entry: When the transmission assembly is working, the drive gear assembly 4 and driven gear assembly 5 rotate at high speed and violently agitate the internal lubricating oil, causing the lubricating oil to mix with air to form an oil-gas mixture. This oil-gas mixture flows along the internal chambers of the transmission and enters the interior of the second ventilation duct 7 through the inlet 72 in the middle section of the second ventilation duct 7, achieving orderly collection of the oil-gas mixture.

[0024] Oil-gas separation and lubricating oil return: Due to the large internal space of the vent, the lubricating oil and gas mixture will separate at this point, such as... Figure 7-9 As shown, the gas rises and exits through the vent plug 1 into the transmission assembly or reducer assembly, while the lubricating oil flows down to the lubricating oil return channel 62 to return to the transmission assembly or reducer assembly. The drive gear assembly 4 rotates counterclockwise and the driven gear assembly 5 rotates clockwise. Because the lubricating oil return channel 62 is located near the rotation center of the drive gear assembly 4 and the driven gear assembly 5, a negative pressure environment is created at this location. This facilitates the return of lubricating oil from the lubricating oil return channel 62, ultimately allowing it to smoothly flow back into the transmission and re-enter the lubrication cycle.

[0025] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0026] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A transmission assembly for preventing breather plug leakage, characterized in that: The transmission includes a rear housing (2) and a front housing (3), which are assembled and fixed by bolts. The rear housing (2) and the front housing (3) are provided with a meshing drive gear assembly (4) and a driven gear assembly (5). The rear housing (2) and the front housing (3) form a venting passage after assembly. The middle section of the venting passage is provided with a lubricating oil and gas inlet. The upper end of the venting passage is provided with a gas outlet, and the lower end is provided with a lubricating oil return port. The gas outlet is connected to a vent plug (1).

2. The transmission assembly for preventing breather plug leakage according to claim 1, characterized in that: The rear housing (2) has a second ventilation channel (7) at one end near the front housing (3). The upper end of the second ventilation channel (7) has an exhaust port (71) connected to the ventilation plug (1). The middle section of the second ventilation channel (7) has an inlet (72) for lubricating oil and gas to enter the second ventilation channel (7).

3. A transmission assembly for preventing breather plug leakage according to claim 2, characterized in that: The front housing (3) has an air passage (6) at one end near the rear housing (2), and a guide rib (61) is provided at the lower end of the air passage (6). A lubricating oil return passage (62) is formed between the guide rib (61) and the front housing (3).

4. A transmission assembly for preventing breather plug oil leakage according to claim 3, characterized in that: The ventilation channel 2 (7) and the ventilation channel 1 (6) are combined to form a ventilation channel.

5. A transmission assembly for preventing breather plug leakage according to claim 3, characterized in that: The lower end of the second ventilation channel (7) is provided with an oil baffle (73), the oil baffle (73) and the guide rib (61) are corresponding to each other, and the extension direction of the oil baffle (73) is adapted to the extension direction of the guide rib (61).

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