Oil blocking mechanism

Abstract

The utility model discloses an oil blocking mechanism which is characterized by comprising a ventilation plug, a ventilation plug seat, a ventilation plug oil blocking cover and a ventilation plug oil blocking core. A main body of the ventilation plug oil blocking cover is cylindrical, the lower portion of the ventilation plug oil blocking cover is in a circular truncated cone shape, a ventilation hole is formed in the bottom of the circular truncated cone, and a turned-over edge is arranged on the upper portion of the cylinder. The ventilation plug oil blocking cover is inserted into the ventilation plug hole of the axle housing, and the flanging part is welded and matched with the axle housing; a main body of the ventilation plug oil blocking core is in a barrel shape with a bottom on the lower portion, and an opening is formed in the side wall. The ventilation plug oil blocking core is inserted into the ventilation plug oil blocking cover and is in clearance fit with the ventilation plug oil blocking cover; and the ventilation plug seat is T-shaped, is inserted into the upper part of the ventilation plug oil blocking cover, and is welded and matched with the axle housing. The oil blocking mechanism provided by the utility model can effectively prevent internal oil from overflowing in the exhaust process of the ventilation plug.

Description

Technical Field

[0001] The utility model belongs to the technical field of drive axle structures, and particularly relates to an oil-blocking mechanism. Background Art

[0002] The vent valve is the main device for balancing the air pressure inside and outside the axle body. During the driving process of the vehicle, the temperature of the gear oil will continue to change. Generally, the greater the load torque on the gear, the higher the gear oil temperature, which will cause the air pressure inside the axle housing to increase. Under high pressure, the sealing performance of the rubber seals of each oil seal on the drive axle will decrease, resulting in the risk of oil leakage at the oil seal. In order to ensure the balance of the gas pressure inside the drive axle, it is usually necessary to design a ventilation device such as a one-way valve or a vent pipe on the drive axle housing to ensure the balance of the gas pressure inside the drive axle housing. When the vehicle's running speed is higher, the speed of the gears inside the drive axle increases accordingly. At this time, some of the splashing oil will seep out from the vent device. Therefore, it is necessary to add an oil-blocking mechanism to the vent device to avoid this phenomenon.

[0003] The existing structure is Figure 1 As shown, vent plug seat 02 is welded to axle housing 01, vent plug 03 is screwed into the threaded hole of vent plug seat 02 and secured. Oil baffle plate 04 is welded inside axle housing 01 and has a raised structure to create a U-shaped exhaust passage. In the prior art, while the vehicle is in motion, the internal oil baffle plate prevents a large amount of oil from escaping during exhaust. However, some oil still flows through the exhaust passage into the exhaust hole of vent plug 03 under the action of internal air pressure. Some of the oil in the exhaust passage of the vent plug overflows when the vent plug is opened. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an oil-blocking mechanism, which can more effectively prevent the internal oil from overflowing during the exhaust process of the vent plug.

[0005] The utility model is implemented by the following technical solutions: an oil blocking mechanism, characterized in that it includes a vent plug, a vent plug seat, a vent plug oil blocking cover and a vent plug oil blocking core; the vent plug oil blocking cover has a cylindrical main body and a frustum-shaped lower part, a vent hole is provided at the bottom of the frustum, and a flange is provided at the upper part of the cylinder; the vent plug oil blocking cover is inserted into the vent plug hole of the bridge housing, and the flange is welded to the bridge housing; the vent plug oil blocking core has a cylindrical main body with a bottom at the lower part and an opening is provided on the side wall; the vent plug oil blocking core is inserted into the vent plug oil blocking cover and has a clearance fit with the vent plug oil blocking cover;

[0006] The vent plug seat is T-shaped, plugged into the upper part of the vent plug oil blocking cover, and welded to the bridge housing.

[0007] Furthermore: the upper part of the vent plug oil-blocking core is welded to the vent plug seat.

[0008] Furthermore: there are four openings on the oil-blocking core of the vent plug.

[0009] Furthermore: a threaded hole is provided on the vent plug seat, and the vent plug is threadably matched with the threaded hole.

[0010] The beneficial effects of the structure of the present invention are: the oil-blocking mechanism provided by the present invention, the conical top opening of the vent plug oil-blocking cover reduces the size of the exhaust channel entrance, forming a first oil-blocking wall, and the end face of the vent plug oil-blocking baffle and the vent plug exhaust port are in the shape of a porch, forming a second oil-blocking wall, thereby effectively preventing the internal oil from overflowing during the vent plug exhaust process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG1 is a schematic diagram of an oil-blocking structure in the prior art;

[0012] Figure 2 is a schematic diagram of the overall structure of the utility model;

[0013] Figure 3 is a schematic structural diagram of the vent plug oil blocking cover of the utility model;

[0014] Figure 4 It is a schematic structural diagram of the oil-blocking core of the vent plug of the utility model.

[0015] Description of the serial numbers in the figure:

[0016] 01-bridge housing; 02-vent plug seat; 03-vent plug; 04-oil baffle plate; 04A-vent plug oil blocking cover; 04B-vent plug oil blocking core; 041-vent hole; 042-opening. DETAILED DESCRIPTION

[0017] like Figure 2-4 As shown, the utility model discloses an oil blocking mechanism, which includes a vent plug 03, a vent plug seat 02, a vent plug oil blocking cover 04A and a vent plug oil blocking core 04B arranged on the bridge housing 01; the vent plug oil blocking cover 04A has a cylindrical main body and a frustum-shaped lower part, a vent hole 041 is provided at the bottom of the frustum, and a flange is provided at the upper part of the cylinder; the vent plug oil blocking cover 04A is plugged into the vent plug hole of the bridge housing 01, and The flanged portion is welded to the bridge housing 01; the main body of the vent plug oil-blocking core 04B is a cylinder with a bottom at the bottom, and an opening 042 is provided on the side wall; the vent plug oil-blocking core 04B is inserted into the vent plug oil-blocking cover 04A and has a gap with the vent plug oil-blocking cover 04A to prevent oil from splashing out while ensuring gas circulation; the vent plug seat 02 is T-shaped, inserted into the upper part of the vent plug oil-blocking cover 04A, and welded to the bridge housing 01.

[0018] Preferably, the upper portion of the vent plug oil-blocking core 04B is welded to the vent plug seat 02 .

[0019] Preferably, the vent plug oil-blocking core 04B is movably arranged in the vent plug oil-blocking cover 04A and is clearance-matched with the vent plug oil-blocking cover 04A, and there is always a gap between the two to ensure air passage.

[0020] Preferably, the vent plug oil-blocking core 04B has four openings. Furthermore, the openings extend through the bottom surface, forming a circular bottom surface with a slight notch. This ensures that even if the bottom surface completely falls on the frustum, it will not be completely sealed. This structure facilitates partial air backflow after exhaust, ensuring uniform internal and external pressure.

[0021] Preferably, a threaded hole is provided on the vent plug seat 02, and the vent plug 03 is threadedly matched with the threaded hole.

[0022] The assembly and working process of this utility model are as follows:

[0023] Place the vent plug oil-blocking core 04B inside the vent plug oil-blocking cover 04A or weld it to the lower end of the vent plug seat 02, then insert the vent plug seat 02 into the inner side of the upper part of the vent plug oil-blocking cover 04A, and then insert the two together into the vent hole on the bridge housing 01 and weld them to the bridge housing 01 as a whole. Finally, thread the vent plug 03 into the threaded hole on the vent plug seat 02 to complete the installation.

[0024] When the oil and air in the bridge housing 01 are heated and generate gas expansion during operation, the gas below (inside) the bridge housing flows upward along the vent hole 041 into the vent plug oil blocking cover 04A, and the bottom of the vent plug oil blocking core 04B is in contact with the gas and is forced upward (it does not move during welding). The gas is forced to disperse to both sides and then enters the vent plug oil blocking core 04B from the opening 042, and is discharged into the air outside the bridge housing through the vent plug 03. In this process, the oil mixed in the gas is first blocked once at the vent hole 041, and then blocked a second time at the bottom of the gas plug oil blocking core 04B, so that most of the oil is blocked, realizing the oil blocking function.

[0025] The vent plug oil-blocking cover 04A in the oil-blocking mechanism described in the present invention is a combination of a cylinder + a cone (or a frustum), and the opening at the top of the cone reduces the size of the exhaust channel entrance to form a first oil-blocking wall; the vent plug oil-blocking core 04B is cylindrical, and four openings are provided on the cylindrical surface to facilitate air circulation. The end face and the vent plug exhaust port are in a porch-like structure, which changes the gas-liquid path to form a second oil-blocking wall.

[0026] The above detailed description is for a feasible embodiment of the present invention, and the embodiment is not intended to limit the scope of the application claims of the present invention. All other equivalent changes and modifications that do not depart from the technical solution of the present invention are included in the scope of the claims covered by the present invention.

Claims

1. An oil blocking mechanism, characterized in that: Its characteristics are: It comprises a vent plug (03), a vent plug seat (02), a vent plug oil blocking cover (04A) and a vent plug oil blocking core (04B); The vent plug oil blocking cover (04A) has a cylindrical main body and a frustum-shaped lower part. The frustum is provided with a vent hole (041) at the bottom, and a flange is provided at the upper part of the cylinder. The vent plug oil blocking cover (04A) is inserted into the vent plug hole of the bridge housing (01), and the flange is welded to the bridge housing (01). The vent plug oil-blocking core (04B) has a main body in the shape of a cylinder with a bottom at the bottom, and an opening (042) is provided on the side wall; the vent plug oil-blocking core (04B) is inserted into the vent plug oil-blocking cover (04A) and is gap-matched with the vent plug oil-blocking cover (04A); The vent plug seat (02) is T-shaped, plugged into the upper portion of the vent plug oil blocking cover (04A), and welded to the axle housing (01).

2. An oil-blocking mechanism according to claim 1, characterized in that: Its characteristics are: The upper portion of the vent plug oil-blocking core (04B) is welded to the vent plug seat (02).

3. The oil-blocking mechanism according to claim 1, characterized in that: Its characteristics are: There are four openings on the vent plug oil blocking core (04B).

4. The oil-blocking mechanism according to claim 1, characterized in that: Its characteristics are: A threaded hole is provided on the vent plug seat (02), and the vent plug (03) is threadedly matched with the threaded hole.

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