CN212604299U

CN212604299U - Exhaust device and drive axle

Info

Publication number: CN212604299U
Application number: CN202021917731.XU
Authority: CN
Inventors: 吴志强; 陈道斌; 李春光
Original assignee: Guangdong Fuwa Heavy Industry Co Ltd
Current assignee: Guangdong Fuwa Heavy Industry Co Ltd
Priority date: 2020-09-05
Filing date: 2020-09-05
Publication date: 2021-02-26
Anticipated expiration: 2030-09-05

Abstract

The utility model discloses an exhaust device and a drive axle, wherein the exhaust device comprises a vent plug and an end cover; the vent plug comprises a top end surface, a bottom end surface and a vent hole; the end cover comprises an end wall and a side wall, and the side wall is sleeved on the outer side surface of the vent plug; a first annular blocking wall and a second annular blocking wall are arranged between the top end face and the end wall, a first gap is formed between the first annular blocking wall and the second annular blocking wall, and a second gap is formed between the second annular blocking wall and the side wall; a first notch is formed in the first annular blocking wall, a second notch is formed in the second annular blocking wall, and the first notch and the second notch are staggered with each other along the circumferential direction of the vent hole; an air guide groove is formed between the outer surface of the side wall and the outer surface of the vent plug, the air guide groove is communicated with the external environment through a first opening and a second gap, and the first opening and the second notch are staggered with each other along the circumferential direction of the vent hole. The utility model discloses can be timely, quick with gas outgoing, prevent that outside air from flowing backward and getting into air vent and gear oil and leaking.

Description

Exhaust device and drive axle

Technical Field

The utility model relates to the technical field of vehicles, concretely relates to exhaust apparatus and transaxle.

Background

The drive axle is an important part of a vehicle, an axle housing cavity is required to be arranged in the middle of the drive axle for installing a speed reducer, in order to timely discharge gas in an axle housing and ensure that the pressure of gear oil in the axle housing cavity is kept in a normal range, an exhaust device is required to be arranged on the outer wall of the axle housing cavity, the existing exhaust device comprises an exhaust pipe, a gasket, a spring and an end cover, the end cover is connected to the outer end of the exhaust pipe, the gasket is covered at the opening of the outer end of the exhaust pipe, the spring is arranged between the gasket and the end cover, the gasket is tightly pressed outside the opening of the outer end of the exhaust pipe through the elastic stress of the spring so as to seal the opening of the outer end of the exhaust pipe, external muddy water and dust are prevented from entering the axle housing cavity through the exhaust pipe to pollute the gear oil, when the pressure of the gas in the axle housing, The clearance discharge of end cover and blast pipe to guarantee the inside and outside atmospheric pressure balance of axle housing cavity, this kind of structure is higher to the required precision of spring, the produced elastic stress of spring should keep in an accurate within range promptly, just can ensure that exhaust apparatus can normally work, when the elastic stress of spring was too big, gas in the axle housing cavity can not in time be got rid of, lead to the axle housing cavity internal pressure too big, cause gear oil to leak from the sealed position of axle housing cavity, if the elastic stress undersize of spring, then external air can flow backward into in the axle housing cavity via the blast pipe, cause the pollution to gear oil.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an exhaust apparatus, it need not to use the spring, can in time discharge gas, can prevent again simultaneously that the air from flowing backward.

The second purpose of the utility model is to provide a drive axle.

In order to achieve the above object, the utility model adopts the following technical scheme:

an exhaust device comprises a vent plug and an end cover;

the vent plug comprises a top end surface and a bottom end surface, and a vent hole extending from the bottom end surface to the top end surface is formed in the vent plug; the end cover comprises an end wall positioned above the top end face and a side wall extending downwards from the periphery of the end wall, and the side wall is sleeved on the outer side face of the vent plug and attached to the outer side face of the vent plug;

a first annular blocking wall surrounding the periphery of the top opening of the vent hole and a second annular blocking wall surrounding the periphery of the first annular blocking wall are arranged between the top end face and the end wall, the bottoms of the first annular blocking wall and the second annular blocking wall are in close fit with the top end face, the top of the first annular blocking wall and the end wall are in close fit, a first gap is formed between the first annular blocking wall and the second annular blocking wall, and a second gap is formed between the second annular blocking wall and the side wall;

a first gap for communicating the first gap with the vent hole is formed in the first annular blocking wall, a second gap for communicating the second gap with the first gap is formed in the second annular blocking wall, and the first gap and the second gap are staggered with each other along the circumferential direction of the vent hole;

an air guide groove is arranged between the outer surface of the side wall and the outer surface of the vent plug, the air guide groove is communicated with the second gap through a first opening positioned at the top of the air guide groove and communicated with the external environment through a second opening positioned at the bottom of the air guide groove, and the first opening and the second notch are staggered with each other along the circumferential direction of the vent hole.

The first annular blocking wall and the second annular blocking wall are integrally formed on the top end face.

The outer side surface of the vent plug is provided with a convex block protruding outwards, the side wall is sleeved on the outer peripheral surface of the convex block and is in interference fit with the outer peripheral surface of the convex block, the air guide groove is formed in the convex block, the first opening is located on the upper end surface of the convex block, and the second opening is located on the lower end surface of the convex block.

The bottom of lateral wall is provided with the portion of hitching towards inboard bending, and the lower terminal surface of lug is located to this hitch portion card.

The air vent plug is provided with an oil guide groove, the oil guide groove extends from the inner wall of the air vent to the top end face, the bottom surface of the oil guide groove is an inclined plane, and the inclined plane is gradually inclined downwards from outside to inside.

Lead the oil groove and be located first breach under to lead the top of oil groove and link up with the bottom of first breach.

The second notch extends downwards from the top end part of the second annular blocking wall, and the bottom surface of the second notch is higher than the top end surface.

The outer side surface of the vent plug is provided with a plurality of convex ribs extending along the circumferential direction of the vent plug.

The bottom of the vent hole is in a cone shape with the aperture gradually decreasing from bottom to top.

In order to achieve the second purpose, the utility model adopts the following technical scheme:

the drive axle, including the casing, the inside axle housing cavity that forms of casing, this drive axle still include foretell exhaust apparatus, and exhaust apparatus's the bottom of ventilating the stopper is connected on the casing, and ventilates the air vent and the axle housing cavity intercommunication of stopper.

The beneficial effects of the utility model reside in that:

compared with the existing exhaust device, the utility model has the advantages that the plurality of annular channels and the notches are arranged at the positions where the end cover is matched with the vent plug, so that the vent hole is always kept in a communicated state with the external environment, the gas can be exhausted timely and rapidly, and the external air can be prevented from flowing backwards to enter the vent hole; simultaneously, the gear oil that mix with in the gas can be by effectual blockking and finally through the air vent backward flow, prevents that gear oil from leaking.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the installation of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 1;

fig. 4 is a sectional view B-B of fig. 1.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1, 2, 3, and 4, for the exhaust apparatus of the present invention, it includes a vent plug 10 and an end cap 20, wherein the vent plug 10 may be made of rubber, the end cap 20 is made of metal, the vent plug 10 is substantially cylindrical, and includes a top end surface 101 and a bottom end surface 102 opposite to the top end surface 101, a vent hole 103 is disposed on the vent plug 10, and the vent hole 103 extends from the bottom end surface 102 to the top end surface 101; the end cap 20 includes an end wall 21 located at the top thereof, and a ring-shaped side wall 22 extending downward from the periphery of the end wall 21, the end cap 20 is fastened to the top of the vent plug 10, so that the end wall 21 is located above the top end surface 101, the side wall 22 is sleeved on the outer side surface of the vent plug 10, and the side wall 22 is attached to the outer side surface of the vent plug 10, so that the side wall 22 and the outer side surface of the vent plug 10 are in a sealed fit state, the side wall 22 may be in interference fit with the outer side surface of the vent plug 10, so as to achieve the tightness of the fit between the side wall 22 and the outer side surface of the vent plug 10, and of course, the side wall 22.

In one preferred embodiment of the present invention, a first annular blocking wall 11 and a second annular blocking wall 12 are provided on the vent plug 10, the first annular blocking wall 11 and the second annular blocking wall 12 are both formed by extending upward from the top end surface 101, wherein the first annular blocking wall 11 surrounds the periphery of the opening of the vent hole 103 on the top end surface 101, the second annular blocking wall 12 surrounds the periphery of the first annular blocking wall 11, the inner diameter of the second annular blocking wall 12 is larger than the outer diameter of the first annular blocking wall 11, a first gap 104 is formed therebetween, the inner diameter of the side wall 22 is larger than the outer diameter of the second annular blocking wall 12, a second gap 105 is formed therebetween, when the end cap 20 is fastened to the vent plug 10, the top ends of the first annular blocking wall 11 and the second annular blocking wall 12 abut against the lower surface of the end wall 21, that is, the top portions of the first annular blocking wall 11 and the second annular blocking wall 12 are tightly fitted with the end wall 21, meanwhile, because the first annular blocking wall 11 and the second annular blocking wall 12 are integrally formed on the top end face 101, the bottoms of the first annular blocking wall 11 and the second annular blocking wall 12 and the top end face 101 are closed, and meanwhile, the side wall 22 and the outer side face of the vent plug 10 are in closed fit, so that the first gap 104 and the second gap 105 respectively form an annular channel between the vent plug 10 and the end cover 20; a first notch 111 is formed in the first annular blocking wall 11, the first notch 111 penetrates from the outer side surface of the first annular blocking wall 11 to the inner side surface so as to communicate the vent hole 103 with the first gap 104, meanwhile, a second notch 121 is formed in the second annular blocking wall 12, the second notch 121 penetrates from the outer side surface of the second annular blocking wall 12 to the inner side surface so as to communicate the first gap 104 with the second gap 105, and the first notch 11 and the second notch 121 are mutually staggered along the circumferential direction of the vent hole 103. Furthermore, a vent groove 131 is provided between the side wall 22 and the outer surface of the vent plug 10, a top of the vent groove 131 forms a first opening, a bottom of the vent groove 131 forms a second opening, the first opening of the vent groove 131 communicates with the second gap 105, the second opening thereof extends to the surface of the vent plug 10 or the surface of the end cap 20 to communicate with the outside in a ring shape, and the first opening and the second notch 121 are offset from each other in the circumferential direction of the vent hole 103.

The exhaust device of the utility model is installed on the shell of the drive axle, concretely, the bottom of the vent plug 10 is connected on the shell, the vent hole 103 is communicated with the clamping shell cavity inside the shell, when the gas pressure in the cavity of the axle shell is increased, the exhaust device exhausts gas, the gas enters the first gap 104 through the first gap 111 in the process of exhausting the gas through the vent hole 103, the gas flows in the first gap 104 and enters the second gap 105 through the second gap 121, the gas flows in the second gap 105 and enters the vent groove 131 to be exhausted to the external environment, the exhaust device is utilized to keep the pressure in the cavity of the axle shell balanced with the atmospheric pressure of the external environment, meanwhile, in the process of exhausting, through the blocking of the first annular baffle wall 11, a part of gear oil carried in the gas flows back to the cavity of the axle shell through the vent hole after being attached on the first annular baffle wall 11, another part of the gear oil enters the first gap 104 along with the gas, is blocked by the second annular baffle wall 12, is deposited in the first gap 104, flows back to the vent hole 103 through the first notch 111, and finally flows back to the axle housing cavity, and in addition, a tiny part of the gear oil flows into the second gap 105 along with the gas from the second notch 121, and the tiny part of the gear oil finally adheres to the second annular baffle wall 105 and the side wall 22 along with the gas flowing in the second gap 105, so the gear oil is prevented from leaking outwards.

In order to facilitate the installation and ensure the sufficient size of the ventilation slot 131 to achieve timely and rapid exhaust, the present invention provides a convex block 13 protruding outwards on the outer side surface of the ventilation plug 10, the top end surface of the convex block 13 is connected to the bottom end portion of the second annular blocking wall 12, the side wall 22 is sleeved on the outer peripheral surface of the convex block 13, and the side wall 22 and the convex block 13 are in interference fit, the ventilation slot 131 is opened on the convex block 13 and extends from the upper end surface of the convex block 131 to the lower end surface, that is, the ventilation slot 131 forms a first opening on the upper end surface of the convex block, and a second opening is formed on the lower end surface of the convex block 13. Compared with the method that the air guide groove 131 is arranged on the outer side surface of the vent plug 10, the method that the air guide groove 131 is arranged on the convex block 13 can enable the air guide groove 131 to have relatively large depth, so that gas can be discharged timely and quickly through the air guide groove 131. Of course, the vent groove 13 may be formed by a rib provided on the side wall 22, for example, by pressing the side wall 22 with a rib protruding outward by a press process, and the portion of the side wall 22 where the rib is not provided is closely attached to the outer circumferential surface of the protrusion 13 or the outer side surface of the vent plug, and the rib is provided at a position spaced apart from the outer circumferential surface of the protrusion 13 or the outer side surface of the vent plug 10 by a predetermined distance due to the outward bulge. On the premise of providing the above-mentioned bump 13, an inwardly bent hanging portion 23 may be provided at the bottom of the side wall 22, the hanging portion 23 is clamped on the lower end surface of the bump 13, the hanging portion 23 may be formed by processing the side wall 22 through a stamping process, after the vent plug 10 and the end cap 20 are mounted in place, the hanging portion 23 is inwardly bent, so that the hanging portion 23 is disposed on the lower end surface of the bump 13, and the bump 13 is pressed, so that the end cap 20 is prevented from being detached from the vent plug 10.

In another preferred embodiment, in order to enable the gear oil deposited in the first gap 104 to rapidly flow back to the vent hole 103, the present invention provides an oil guiding groove 14 on the vent plug 10, wherein the oil guiding groove 14 extends from the inner wall of the vent hole 103 to the top end surface 101, and the bottom surface of the oil guiding groove 14 is provided as a slope 141, the slope 141 is gradually inclined downwards from outside to inside, and the gear oil deposited in the first gap 104 can rapidly flow back to the vent hole 103 through the smooth slope 141; for convenience of processing, the oil guiding groove 14 and the first notch 111 may be formed on the vent plug 10 at one time, specifically, the oil guiding groove 14 is located right below the first notch 111, and the top of the oil guiding groove 14 is connected to the first notch 111, and the oil guiding groove 14 and the first notch 111 may be regarded as an opening structure extending from the top of the first annular blocking wall 11 to the top end surface 101.

The second notch 121 of the present invention is formed by extending the top end of the second annular blocking wall 12 downward, and the bottom surface of the second notch 121 is higher than the top end surface 101, so that the gear oil deposited in the first gap 104 will not enter the second gap 105 through the second notch 121, and it can be ensured that the gas can enter the second gap 105 through the second notch 121 from the first gap 104.

In the above-described embodiment, two first notches 111 may be provided in the first annular barrier wall 11, two second notches 121 may be provided in the second annular barrier wall 12, the first notches 111 and the second notches 121 may be offset by 90 ° in the circumferential direction of the vent hole 103, and similarly, two vent grooves 131 may be provided in the projection 13, the vent grooves 131 may be offset by 90 ° from the second notches 121 in the axial direction of the vent hole 103. Of course, only one first notch 111, one second notch 121, and one vent groove 131 may be provided, the first notch 111 and the second notch 121 may be shifted by an angle of 180 °, and the second notch 121 and the vent groove 131 may be shifted by an angle of 180 ° similarly.

In another embodiment of the present invention, the first annular blocking wall 11 and the second annular blocking wall 12 are disposed on the end cap 20, in this embodiment, the end cap 20 and the vent plug 10 should be made of suitable materials, after the end cap 20 and the vent plug 10 are fastened and installed, the bottom ends of the first annular blocking wall 11 and the second annular blocking wall 12 are pressed against the top end surface 101 of the vent plug 10 and are tightly fitted with the top end surface 101, and at the same time, the first annular blocking wall 11 surrounds the top periphery of the vent hole 103.

In addition, the bottom of the vent hole 103 is set to be a cone shape with the aperture gradually decreasing from bottom to top, so that the bottom of the vent hole 103 forms a horn-shaped opening, and when gas passes through the horn-shaped opening, gear oil mixed in the gas can be blocked by the inner wall of the cone shape.

The utility model discloses still be provided with many protruding muscle 14 on the lateral surface of breather plug 10, protruding muscle 14 extends along the circumference that prolongs breather plug 10, when the casing installation with the transaxle, in inserting the mounting hole of seting up on the casing with breather plug 10, a plurality of protruding muscle 14 are by the inner wall extrusion deformation of mounting hole to ensure that breather plug 10 has the leakproofness of preferred with casing cooperation department.

It should be noted that the utility model discloses an exhaust apparatus not only can install on the casing of transaxle as above-mentioned, it can also be the application have the exhaust demand, avoid simultaneously that fluid leaks on other mechanisms.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An exhaust device is characterized by comprising a vent plug and an end cover;

2. The exhaust apparatus as claimed in claim 1, wherein the first annular dam and the second annular dam are integrally formed on the top end surface.

3. The exhaust device as claimed in claim 2, wherein the vent plug has an outer side surface provided with a protrusion protruding outward, the sidewall is fitted around and interference-fitted to an outer peripheral surface of the protrusion, the air guide groove is formed in the protrusion, the first opening is located on an upper end surface of the protrusion, and the second opening is located on a lower end surface of the protrusion.

4. The exhaust device according to claim 3, characterized in that the bottom of the side wall is provided with a hanging part bent towards the inner side, and the hanging part is clamped on the lower end surface of the lug.

5. The exhaust apparatus as claimed in claim 1, wherein the vent plug is provided with an oil guide groove extending from an inner wall of the vent hole to the top end surface, and the bottom surface of the oil guide groove is a slope which is gradually inclined downward from the outside to the inside.

6. The vent apparatus of claim 5, wherein the oil drainage groove is located directly below the first notch, and wherein a top of the oil drainage groove engages a bottom of the first notch.

7. The exhaust apparatus as claimed in claim 1, wherein the second notch extends downwardly from a top end of the second annular blocking wall, and a bottom surface of the second notch is higher than a top end surface.

8. The exhaust apparatus as claimed in claim 1, wherein the outer side surface of the vent plug is provided with a plurality of ribs extending in a circumferential direction of the vent plug.

9. The exhaust apparatus as claimed in claim 1, wherein the bottom of the vent hole is tapered such that the diameter of the hole decreases gradually from the bottom to the top.

10. A drive axle comprising a housing defining an axle cavity therein, wherein the drive axle further comprises an exhaust as claimed in any one of claims 1 to 9, wherein a bottom portion of a vent plug of the exhaust is connected to the housing, and a vent hole of the vent plug communicates with the axle cavity.