CN220973824U

CN220973824U - Automobile drive axle ventilation system

Info

Publication number: CN220973824U
Application number: CN202322623726.8U
Authority: CN
Inventors: 徐秀良; 邵帅
Original assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Current assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date: 2023-09-26
Filing date: 2023-09-26
Publication date: 2024-05-17
Anticipated expiration: 2033-09-26

Abstract

An automobile drive axle ventilation system belongs to the technical field of automobile drive axles, and comprises an axle housing and a ventilation plug arranged on the axle housing, wherein an oil blocking cover with holes is arranged in the axle housing at the inlet of the ventilation plug, and the outlet of the ventilation plug is connected with a ventilation pipe; the oil shield comprises a bottom plate, side walls are arranged around the bottom plate, and the bottom plate and the side walls form a shield body with an opening; the opening of the cover body faces the inlet of the ventilation plug, and the periphery of the opening of the cover body is provided with a flanging extending outwards. The ventilation system of the automobile drive axle has reasonable design and simple structure, not only can prevent greasy dirt from blocking the ventilation plug, but also can prevent lubricating oil from forming a cross-section oil film, can effectively avoid the phenomenon of oil seepage at the mouth of the ventilation pipe, and ensures the normal operation of the drive axle.

Description

Automobile drive axle ventilation system

Technical Field

The utility model relates to the technical field of vehicle drive axles, in particular to an automobile drive axle ventilation system.

Background

The automobile drive axle is the last assembly of a transmission system and is one of the most important parts of an automobile chassis assembly. The engine torque transmitted by the universal transmission device of the automobile drive axle is transmitted to the driving wheels through the main speed reducer, the differential mechanism, the half shafts and the like, so that the speed and the torque can be reduced, the torque transmission direction can be changed, the inner and outer wheels can be ensured to steer at different speeds, and the running requirement of the automobile can be met.

The axle housing of the automobile drive axle is a huge cavity, and the air volume in the cavity can be obviously changed along with the temperature change of the automobile drive axle, so that the air pressure in the cavity is increased, the oil seal function is damaged, and the oil leakage fault occurs. In order to balance the internal and external air pressure of the cavity, the axle housing is generally provided with a vent plug, but in the running process of the automobile, part of splashed oil drops overflow through the vent plug, and the phenomenon of oil seepage occurs. In order to prevent the oil seepage phenomenon at the vent plug, a vent pipe is generally arranged at the same time, and oil mist and oil gas entering the vent plug can be condensed on the wall of the vent pipe and flow back into the bridge.

In extreme cases, due to the tension action of the liquid surface, the lubricating oil gathers to a certain volume in the breather pipe, and an oil film is formed on the cross section of the breather pipe. The pressure change in the cavity can push an oil film to the breather pipe until the breather pipe orifice, and the breather pipe orifice is subjected to oil seepage phenomenon, so that the normal operation of an automobile drive axle is affected.

Disclosure of utility model

The utility model aims to overcome the defect of oil seepage of a vent pipe orifice in the prior art, and provides an automobile drive axle ventilation system which is reasonable in design and simple in structure, can prevent oil stains from blocking a vent plug, can prevent lubricating oil from forming a cross-section oil film, can effectively avoid the phenomenon of oil seepage of the vent pipe orifice, and ensures the normal operation of a drive axle.

The utility model is realized by the following technical scheme: the ventilation system of the automobile drive axle comprises an axle housing and a ventilation plug arranged on the axle housing, wherein an oil blocking cover with holes is arranged in the axle housing at the inlet of the ventilation plug, and the outlet of the ventilation plug is connected with a ventilation pipe; the oil shield comprises a bottom plate, side walls are arranged around the bottom plate, and the bottom plate and the side walls form a shield body with an opening; the opening of the cover body faces the inlet of the ventilation plug, and the periphery of the opening of the cover body is provided with a flanging extending outwards.

The ventilation system is composed of the axle housing, the oil blocking cover, the ventilation plug and the ventilation pipe form a ventilation pipeline, and the ventilation management can balance the air pressure inside and outside the axle housing. The oil blocking cover is arranged at the inlet of the ventilation pipeline, can block oil drops thrown to the inlet of the ventilation pipeline, and can enable the oil drops to flow back to the bottom of the axle housing along the body, so that the quantity of lubricating oil entering the ventilation pipeline is reduced. The oil shield with the holes is favorable for liquefying atomized lubricating oil, can prevent the atomized lubricating oil from liquefying at the ventilation position, further prevents oil seepage, prevents greasy dirt from blocking the ventilation plug, and also prevents the lubricating oil from forming a cross-section oil film, and the oil seepage phenomenon can not occur at the outlet of the ventilation pipeline.

According to the utility model, the bottom plate and the side walls are of square structures, four side walls are arranged and are respectively fixed on the four side edges of the bottom plate, the four side walls are connected with each other, and the bottom plate and the four side walls form a square cover body.

The utility model further improves that the turnups are rectangular structures and are provided with four turnups, and the four turnups are respectively arranged at the top ends of the four side walls.

A further development of the utility model provides that a right-angle gap is formed between each two adjacent flanges.

The utility model further improves the structure that the joint of the flanging and the side wall is an arc.

In addition, one end of the vent pipe is connected with the outlet of the vent plug, and the other end of the vent pipe is fixed on the frame.

A further improvement of the utility model is that one end of the vent tube is detachably connected with the outlet of the vent plug by a metal hoop.

A further development of the utility model is that the outlet of the vent pipe is directed downwards.

A further improvement of the utility model is that the vent plug is arranged at a position between the middle section oil line of the axle housing and the highest point of the axle housing.

The utility model further improves that the oil shield is made of hollow sheet metal parts or electric welding nets.

From the technical scheme, the beneficial effects of the utility model are as follows: the ventilation system is composed of the axle housing, the oil blocking cover, the ventilation plug and the ventilation pipe form a ventilation pipeline, and the ventilation management can balance the air pressure inside and outside the axle housing. The oil blocking cover is arranged at the inlet of the ventilation pipeline, can block oil drops thrown to the inlet of the ventilation pipeline, and can enable the oil drops to flow back to the bottom of the axle housing along the body, so that the quantity of lubricating oil entering the ventilation pipeline is reduced. The oil shield with the holes is favorable for liquefying atomized lubricating oil, can prevent the atomized lubricating oil from liquefying at the ventilation position, further prevents oil seepage, prevents greasy dirt from blocking the ventilation plug, and also prevents the lubricating oil from forming a cross-section oil film, and the oil seepage phenomenon can not occur at the outlet of the ventilation pipeline.

Drawings

In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

Fig. 2 is a schematic structural view of an oil shield according to an embodiment of the present utility model.

Fig. 3 is a schematic application view of an embodiment of the present utility model.

1. A bridge housing; 2. an oil shield; 21. flanging; 22. a sidewall; 23. a bottom plate; 3. a vent plug; 4. and (5) a vent pipe.

Detailed Description

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.

Referring now to fig. 1-3, in connection with the specific embodiments, the following is described: the utility model relates to an automobile drive axle ventilation system, which comprises an axle housing 1 and a ventilation plug 3 arranged on the axle housing 1, wherein an oil blocking cover 2 with holes is arranged in the axle housing 1 at the inlet of the ventilation plug 3, the outlet of the ventilation plug 3 is connected with a ventilation pipe 4, one end of the ventilation pipe 4 is connected with the outlet of the ventilation plug 3, the other end of the ventilation pipe is fixed on a frame, the outlet of the ventilation pipe 4 is downward, and the outlet of the ventilation pipe 4 is downward, so that rainwater can be prevented from entering; the oil shield 2 comprises a square structure bottom plate 23, side walls 22 with square structures are respectively arranged at four side edges of the bottom plate 23, and the four side walls 22 are connected with each other and form a square shield body with the bottom plate 23; the opening of the cover body faces the inlet of the vent plug 3, namely, the top end of each side wall 22 is respectively provided with a turned-over edge 21 with a rectangular structure, the turned-over edge 21 extends to the outer side of the side wall 22, and a notch with a right-angle structure is formed between every two adjacent turned-over edges 21.

The application principle of the utility model is as follows: the axle housing 1, the oil retaining cover 2, the vent plug 3 and the vent pipe 4 form the vent system, and the side wall 22 and the bottom plate 23 are provided with holes, and the sizes of the holes are matched with lubricating oil with different viscosities. The vent plug 3 and the vent pipe 4 form a vent pipe, the vent pipe can balance the air pressure inside and outside the axle housing 1, the oil blocking cover 2 is arranged at the inlet of the vent pipe, can block oil drops thrown to the inlet of the vent pipe, and can enable the oil drops to flow back to the bottom of the axle housing 1 along the body, so that the quantity of lubricating oil entering the vent pipe is reduced. The oil shield 2 with holes is favorable for liquefying atomized lubricating oil, can prevent the atomized lubricating oil from liquefying at the ventilation position, further prevents oil seepage, prevents greasy dirt from blocking the ventilation plug 3, prevents the lubricating oil from forming a cross-section oil film, and prevents the oil seepage phenomenon from occurring at the outlet of the ventilation pipeline.

In one embodiment, the junction of the flange 21 and the side wall 22 is in the shape of a circular arc. The arc structure is more reasonable, and the installation of the oil shield 2 is facilitated.

In one embodiment, one end of the vent tube 4 is removably connected to the outlet of the vent plug 3 by a metal collar. Through the detachable structure, the vent pipe 4 can be conveniently detached and assembled by a worker.

In one of the embodiments, the vent plug 3 is installed at a position between the middle section oil line of the axle housing 1 and the highest point of the axle housing 1. The above structure prevents the vent plug 3 from interfering with the frame or the upper assembly of the vehicle.

In one embodiment, the oil shield 2 is made of a hollow sheet metal part or an electric welding net. Specifically, the hollowed sheet metal part has the advantages of light weight, high strength, low cost, long service life, corrosion resistance, high temperature resistance and high standardization degree; the mesh surface of the electric welding mesh is flat, the mesh is uniform, the welding spots are firm, and the electric welding mesh is strong in corrosion resistance.

The terms "upper", "lower", "outside", "inside", and the like in the description and in the claims of the present utility model and in the above drawings, if any, are used for distinguishing between relative relationships in position and not necessarily for giving qualitative sense. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The ventilation system of the automobile drive axle comprises an axle housing (1) and a ventilation plug (3) arranged on the axle housing (1), and is characterized in that an oil blocking cover (2) with holes is arranged at the inlet of the ventilation plug (3) in the axle housing (1), and the outlet of the ventilation plug (3) is connected with a ventilation pipe (4); the oil shield (2) comprises a bottom plate (23), side walls (22) are arranged around the bottom plate (23), and the bottom plate (23) and the side walls (22) form a shield body with an opening; the opening of the cover body faces the inlet of the ventilation plug (3), and a flanging (21) extending outwards is arranged around the opening of the cover body.

2. The ventilation system of an automobile drive axle according to claim 1, wherein the bottom plate (23) and the side walls (22) are square structures, the side walls (22) are four, the four side walls (22) are respectively fixed at four sides of the bottom plate (23), the four side walls (22) are connected with each other, and the bottom plate (23) and the four side walls (22) form a square cover body.

3. An automotive drive axle ventilation system according to claim 2, characterized in that the flange (21) is of rectangular configuration and provided with four flanges (21) arranged at the top ends of the four side walls (22), respectively.

4. A vehicle drive axle ventilation system according to claim 3, characterized in that a right-angle gap is formed between each two adjacent flanges (21).

5. The ventilation system of an automobile drive axle according to claim 4, wherein the junction of the flange (21) and the side wall (22) is in the shape of an arc.

6. A vehicle drive axle venting system according to claim 1, characterized in that one end of the vent tube (4) is connected to the outlet of the vent plug (3), the other end of the vent tube (4) being fixed to the vehicle frame.

7. A vehicle drive axle venting system according to claim 6, characterized in that one end of the vent tube (4) is detachably connected to the outlet of the vent plug (3) by means of a metal collar.

8. An automotive drive axle ventilation system according to claim 7, characterized in that the outlet of the ventilation tube (4) is directed downwards.

9. A vehicle drive axle venting system according to claim 1, characterized in that the vent plug (3) is mounted at a position between the mid-section oil line of the axle housing (1) and the highest point of the axle housing (1).

10. The ventilation system of an automobile drive axle according to claim 1, wherein the oil shield (2) is made of a hollowed sheet metal part or an electric welding net.