CN220053379U

CN220053379U - Ventilation plug and automobile hub cover using same

Info

Publication number: CN220053379U
Application number: CN202321376854.0U
Authority: CN
Inventors: 陈文杰; 殷立威; 丁维超; 王海鸯
Original assignee: Jiangsu Leili Motor Co Ltd
Current assignee: Jiangsu Leili Motor Co Ltd
Priority date: 2023-05-30
Filing date: 2023-05-30
Publication date: 2023-11-21
Anticipated expiration: 2033-05-30

Abstract

The utility model discloses a ventilation plug and an automobile hub cover using the ventilation plug, comprising: a base for fixing in a hub cover of an automobile and a labyrinth ventilation assembly arranged in the base; the base is provided with a hollow cavity extending along the axial direction of the automobile hub cover, end plates positioned at two ends of the hollow cavity, and vent holes which are arranged on the side wall of the end plates or the base and are respectively communicated with the hollow cavity from two ends of the base along the axial direction of the automobile hub cover; the outer side wall of the base is also provided with a protruding limiting part for being matched with an automobile hub cover and a limiting groove for being assembled with a sealing ring; and the labyrinth ventilation assembly comprises an air guide piece arranged in the hollow cavity; the air guide piece is internally provided with air flow channels which are arranged in a zigzag way and are used for respectively communicating with the vent holes at the two ends of the base.

Description

Ventilation plug and automobile hub cover using same

Technical Field

The utility model relates to the technical field of automobile parts, in particular to a ventilation plug and an automobile hub cover using the ventilation plug.

Background

The cover body of the hub end cover on the outer bearing of the automobile hub is mainly used for preventing lubricant in the hub from being thrown out from the bearing and preventing foreign matters from entering the bearing. When the wheel operates, the temperature in a closed cavity enclosed by the hub and the hub end cover rises, if the pressure in the cavity increases, excessive gas is not discharged timely, so that the sealing element is invalid, lubricating oil leaks out, the normal operation and service life of the hub are affected, and therefore, an exhaust port (sometimes called an exhaust path) is needed to be provided to allow the pressure between the cavity and the environment (usually the atmosphere) to be balanced.

For the above, patent publication CN112074420B discloses a hubcap vent plug capable of suppressing leakage of lubricant while allowing communication of gas in a hubcap cavity with the environment. However, practical researches show that the vent plug has the following defects in use:

firstly, the vent plug is prevented from falling off the hub cap only by the interference fit of the sealing element and the hub cap scope, which means that the sealing element needs to have larger compression amount to achieve the purpose of preventing falling off, but the larger compression amount can cause the increase of the installation force, namely the installation difficulty is increased.

In addition, the vent plug in the above technology may not be in contact with foreign matters such as branches during the running process of the locomotive, and the vent plug in the above technology lacks a rigid limit structure in the automobile hub cover, so that the vent plug may fall off from the automobile hub cover due to the contact of the foreign matters, and in this case, the peep hole which is usually a plastic part may be easily damaged.

Furthermore, the vent plug needs to be overhauled after being blocked. When the whole vent plug is detached during maintenance, the risk of oil leakage exists, and if only the cover is detached, a tiny channel surrounded by the protection piece and the base is difficult to maintain. Thus, in the case of the vent plugs currently used in automotive hubcaps, there is a need for further optimization of their overall structure to avoid the various problems presented above, on the basis of meeting the venting use requirements.

Disclosure of Invention

A first object of the present utility model is to provide a vent plug to solve the technical problem of optimizing the overall structure of the vent plug.

A second object of the present utility model is to provide a vehicle hub cover to solve the technical problem of optimizing the overall structure of a vent plug in the vehicle hub cover.

The vent plug of the present utility model is implemented as follows:

a vent plug adapted for use in an automotive hubcap, comprising: a base for fixing in a hub cover of an automobile and a labyrinth ventilation assembly arranged in the base; wherein the method comprises the steps of

The base is provided with a hollow cavity extending along the axial direction of the automobile hub cover, end plates positioned at two ends of the hollow cavity, and vent holes which are arranged on the side wall of the end plates or the base and are respectively communicated with the hollow cavity from two ends of the base along the axial direction of the automobile hub cover;

the outer side wall of the base is also provided with a protruding limiting part for being matched with an automobile hub cover and a limiting groove for being assembled with a sealing ring; and

the labyrinth ventilation assembly comprises an air guide piece arranged in the hollow cavity; the air guide piece is internally provided with air flow channels which are arranged in a zigzag way and are used for communicating with the vent holes at the two ends of the base respectively.

In an alternative embodiment of the present utility model, the labyrinth ventilation assembly includes a support member further disposed on a side of the air guide member facing the hub of the automobile in an axial direction of the cover of the automobile; and

and an air flow passage used for communicating the air passage and the vent hole is arranged in the supporting piece.

In an alternative embodiment of the present utility model, the labyrinth ventilation assembly includes a pair of support members disposed on both sides of the air guide member along the axial direction of the automobile hub cover, respectively; and

an air flow passage which is connected with the air passage and the vent hole is arranged in any supporting piece.

In an alternative embodiment of the utility model, the pair of support members are identical in construction.

In an alternative embodiment of the utility model, the support member comprises a base plate for abutting the air guide member and an annular stop portion arranged on one side of the base plate facing away from the air guide member for abutting the corresponding end plate;

the air flow channel comprises at least one through hole arranged on the base plate and at least one ventilation groove arranged on the edge of the annular stop part abutting against the end plate and used for communicating the through hole with the ventilation hole; and

the annular stop part is internally provided with a hollow cavity communicated with the through hole and the ventilation groove.

In an alternative embodiment of the utility model, an end plate of the hollow cavity, which faces towards the automobile hub, is provided with an annular stop protruding towards the air guide; and

the annular stop part is suitable for being inserted into the stop block, and when the annular stop part abuts against the end plate of the hollow cavity, which faces towards the automobile hub, a gap suitable for air flow to pass through exists between the stop block and the base plate.

In an alternative embodiment of the utility model, at least one of the two end plates at both ends of the hollow cavity is detachably coupled to the base.

In an alternative embodiment of the utility model, the end plates respectively positioned at the two ends of the hollow cavity are provided with the vent holes which are axially arranged along the automobile hub cover and are communicated with the hollow cavity.

In an alternative embodiment of the present utility model, the air flow channel includes a plurality of air grooves having the same number and respectively provided on both side end surfaces of the air guide in the axial direction of the automobile hub cover, and a plurality of communication holes connecting the plurality of air grooves on both side end surfaces of the air guide; wherein the method comprises the steps of

Each communication hole is connected with any air groove in a bending way.

The automobile hub cover is realized in the following way:

an automotive hubcap comprising: the hub cover comprises a hub cover main body, an oil gauge cover in sealing fit with the hub cover main body, a gland in fit with the hub cover main body for pressing the oil gauge cover on the hub cover main body, and the ventilation plug simultaneously in fit with the gland and the oil gauge cover;

the oil pointer cover and the gland are communicated with an assembly hole for matching and connecting an air plug; and

a sealing ring is sleeved in the limiting groove and used for being in sealing fit with the inner wall of the through hole corresponding to the oil mark cover;

the limit portion is adapted to be clamped between the gland and the oil level cap.

In an alternative embodiment of the utility model, one end of the hubcap body is formed with a sealing surface that sealingly engages the oil deflector; and

one end of the hub cover main body is further provided with at least one male limiting part matched with the oil pointer cover, and the oil pointer cover is prefabricated with at least one female limiting part matched with the at least one male limiting part.

In an alternative embodiment of the utility model, a sealing ring is further clamped between the oil pointer cover and the sealing surface.

In an alternative embodiment of the utility model, the gland is connected to the hubcap body by fasteners to compress the oil cap between the gland and the hubcap body.

In an alternative embodiment of the utility model, an end plate of the base, which faces away from the automobile hub, is integrally formed on the gland; or alternatively

And a yielding hole for exposing an end plate of the base, which is opposite to the automobile hub, is formed in the gland.

By adopting the technical scheme, the utility model has the following beneficial effects: according to the vent plug and the automobile hub cover using the same, for the vent plug, the limit for the radial dimension of the vent plug is formed by sealing and matching with the oil mark cover of the automobile hub cover, and then the limit for the axial dimension of the vent plug is formed by compressing the limit part between the gland and the oil mark cover. And because the spacing portion is the state of being pressed from both sides tightly, therefore holistic breather plug is along with the in-process that automobile hub lid used, even meet the phenomenon that the breather plug drops from automobile hub lid still can not appear in the friction of foreign matter to on this basis, can reduce the compression volume of the sealing washer between breather plug and the automobile hub lid, thereby reduce the degree of difficulty of installation.

Furthermore, the labyrinth ventilation assembly is used for realizing the repeated steering of the airflow in the circulation process, so that the circulation is increased, the flow passage section is designed to be larger, and the blockage phenomenon is not easy to occur. In addition, the air guide piece is provided with an air flow channel which is arranged in a zigzag manner and can be used for increasing the flowing resistance of the lubricant, so that the leakage of the lubricant is prevented.

Drawings

Figure 1 is a schematic view of the overall structure of the vent plug of the present utility model;

figure 2 is a schematic view of an exploded construction of the vent plug of the present utility model;

figure 3 is a schematic structural view of the base of the vent plug of the present utility model;

figure 4 is a schematic cross-sectional structural view of the base of the vent plug of the present utility model;

figure 5 is a schematic cross-sectional view of the air guide of the vent plug of the present utility model;

figure 6 is a schematic representation of the airflow through the vent plug of the present utility model with the vent plug engaged with the support;

figure 7 is a schematic flow-through view of rain water in a vent plug of the present utility model;

figure 8 is a flow schematic of the airflow in the vent plug of the present utility model in one direction;

FIG. 9 is a schematic view of the structure of the automobile hubcap of the present utility model in a corresponding one of the embodiments;

FIG. 10 is a schematic view of an alternative embodiment of the present utility model for an automotive hubcap;

FIG. 11 is a schematic view of an exploded construction of the automotive hubcap of the present utility model;

FIG. 12 is a first view structural schematic diagram of a gland of the automotive hubcap of the present utility model;

FIG. 13 is a second view structural schematic diagram of the gland of the automotive hubcap of the present utility model;

FIG. 14 is a schematic view of the oil deflector cover of the automotive hub cap of the present utility model from a first perspective;

FIG. 15 is a second perspective structural view of the oil deflector of the automotive hubcap of the present utility model;

FIG. 16 is a schematic view of the structure of the hubcap body of the automotive hubcap of the present utility model;

FIG. 17 is a schematic view of the split construction of the automotive hubcap and vent plug of the present utility model;

FIG. 18 is a schematic view of the mating structure of the automobile hub cap and vent plug of the present utility model;

FIG. 19 is a schematic cross-sectional view of the automotive hubcap and vent plug of the present utility model in one embodiment;

FIG. 20 is a schematic view of the structure of the automotive hubcap of the present utility model in yet another embodiment;

fig. 21 is a schematic sectional view of the automobile hub cap corresponding to fig. 20.

In the figure: the hub cap body 1, the threaded portion 11, the connecting ring 12, the pressure relief port 13, the plug screw 14, the seal face 15, the male limit portion 16, the oil cap 2, the liquid level line 21, the logo 22, the female limit portion 23, the boss 25, the gland 3, the outer ring 31, the inner ring 32, the spoke 33, the notch 34, the positioning groove 36, the relief hole 37, the seal ring 4, the fastener 5, the fitting hole 6, the base 7, the hollow cavity 71, the bottom plate 72, the stopper 73, the limit portion 74, the limit groove 75, the cover plate 76, the vent hole 77, the seal ring 78, the air guide 8, the air groove 81, the communication hole 82, the support 9, the base plate 91, the through hole 92, the annular stop portion 93, and the vent groove 94.

Detailed Description

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

Example 1:

referring to fig. 1 to 8, the present embodiment provides a vent plug suitable for use in a hub cap of an automobile, comprising: a base 7 for fixing in a vehicle hub cover and a labyrinth ventilation assembly provided in the base 7. Wherein the base 7 is adapted to be fastened to the car hub cover such that the integrated vent plug can be secured in the car hub cover, and the labyrinth ventilation assembly in the base 7 is mainly adapted to enable air flow between the inside and the outside of the car hub cover. It is necessary to say here that in the present embodiment, the inner side of the automobile hub cover refers to the side where the automobile hub cover is fitted to the automobile hub, and the outer side of the automobile hub cover refers to the side where the automobile hub cover is relatively far from the automobile hub.

Specifically, the base 7 is first:

the base 7 has a hollow cavity 71 extending in the axial direction of the automobile hub cap (for the hub cap applied in the automobile hub, the axial direction of the automobile hub, also the axial direction of the automobile tire) and end plates at both ends of the hollow cavity 71; that is, the hollow cavity 71 is defined by two end plates in cooperation with the base 7 along the axial direction of the automobile hub. Here the end plates at the ends of the hollow cavity 71 are actually formed by cooperation with the base 7 to limit the hollow cavity 71 axially.

On the basis of the above-described structure, it should be noted that, for the two end plates located at the two axial ends of the hollow cavity 71, at least one end plate and the base 7 are detachably assembled, so that the labyrinth ventilation assembly can be smoothly assembled into the hollow cavity 71. Therefore, in this embodiment, in the case of the drawings, an end plate (hereinafter, referred to as a bottom plate 72 in the embodiment) facing the automobile hub is integrally formed with the base 7, and an end plate (hereinafter, referred to as a cover plate 76 in the embodiment) facing away from the automobile hub is a detachable coupling structure with the base 7, and it should be noted that the orientations of the two end plates with respect to the automobile hub specifically refer to the use positions of the vent plug of this embodiment when applied to the automobile hub cover. Regarding the detachable assembly between the cover plate 76 and the base 7, a snap connection or a threaded connection manner may be adopted, for example, when a threaded connection is adopted, an annular flange may be provided on one side of the cover plate 76 facing the base, an internal thread is provided on an inner wall of the annular flange, and an external thread is correspondingly provided on an outer wall of the base 7, so that the assembly and the disassembly of the cover plate 76 and the base 7 can be rapidly realized. Of course, other removable mounting structures may be used herein, and this embodiment is not intended to be limiting in any way.

Based on the above-mentioned circumstances, in order to meet the use requirement of the ventilation plug of the present embodiment for ventilation in an automobile hub cover, the present embodiment further makes the following design:

generally speaking, the side edges of the two end plates or the end parts of the base 7 respectively connected with the two end plates are provided with vent holes 77, so that air flow can smoothly enter the hollow cavity 71 through the vent holes 77 on the bottom plate 72, and the air flow is guided by the labyrinth ventilation assembly and finally discharged to the outside of the automobile hub cover through the vent holes 77 on the cover plate 76; or the air flow enters the hollow cavity 71 through the vent holes 77 in the cover plate 76 and is directed by the labyrinth ventilation assembly, and finally enters the inside of the automobile hub cover through the vent holes 77 in the bottom plate 72.

Regarding the above-mentioned vent hole 77, the use requirement of the present embodiment is theoretically satisfied whether the vent hole 77 is provided on the end plate (the bottom plate 72 and the cover plate 76) or the base 7, but it has been found through practical studies that, in an alternative implementation, the present embodiment is designed as follows for the vent hole 77 at the end of the hollow cavity 71 facing away from the automobile hub, in consideration of the fact that rainwater is prevented from entering the inside of the automobile hub from the outside of the automobile hub through the vent hole 77:

a vent hole 77 is provided in the cover plate 76 so that air flow enters and exits the vent hole 77 in the cover plate 76 in the axial direction of the automobile hub. The design is mainly used in combination with a specific automobile hub cover on an automobile hub, the use angle of the vent plug is assembled along the axial direction of the automobile hub, so when the vent holes 77 on the cover plate 76 are also distributed along the axial direction of the automobile hub, even if rainwater is sprayed on the surface of the automobile hub cover, the probability that the rainwater enters the vent holes 77 can be greatly reduced, and even if part of the rainwater enters the hollow cavity 71 of the base 7 through the vent holes 77 on the end plate, the vent plug can be discharged from the vent holes 77 on the end plate along the radial direction of the vent plug under the action of gravity of the rainwater. In addition, the provision of the vent hole 77 to extend in the axial direction of the automobile hub also facilitates piercing with fine objects when the vent hole 77 is plugged for servicing.

It should be noted that, the number of the ventilation holes 77 on the cover 76 may be one or plural, and the present embodiment is not limited in any way, and in this embodiment, in one case of the embodiment with reference to the drawings, a plurality of ventilation holes 77 are disposed on the cover 76 at intervals, and the plurality of ventilation holes 77 may be substantially enclosed to form a circular structure, although the plurality of ventilation holes 77 may be optionally disposed, and the shape of the plurality of ventilation holes 77 may be enclosed is not considered.

Further, the vent hole 77 of the hollow cavity 71 facing the automobile hub side is not limited in any way, and may be provided on the bottom plate 72, may be provided on the edge of the end of the base 7 facing the automobile hub side, and may be provided with a communicating vent hole 77 on the bottom plate 72 and the base 7. In this regard, in the present embodiment, the case where the vent hole 77 is provided at the edge of the end of the base 7 on the side facing the automobile hub and extends to the bottom plate 72 is exemplified in conjunction with the drawings. The number of the ventilation holes 77 may be one or more, which is not limited in any way, and the present embodiment is exemplified by the case where a plurality of ventilation holes 77 are provided in conjunction with the accompanying drawings, and the number of ventilation holes 77 on the bottom plate 72 may also be identical to the number of ventilation holes 77 on the cover plate 76.

In addition, regarding the base 7 of the present embodiment, it is also necessary to explain that, in order to facilitate the assembly and fixation of the vent plug of the present embodiment in a specific automobile hub cover, the outer sidewall of the base 7 is further provided with a protruding limiting portion 74 for coupling with the automobile hub cover, and the entire limiting portion 74 may have a substantially annular structure. And the sealing performance is also required to be considered for the matching of the base 7 and the automobile hub cover so as to prevent the leakage of the lubricant, so that the base 7 is also required to be considered for the matching with the sealing ring 78, and for this reason, the limiting grooves 75 for assembling the sealing ring 78 are also provided on the outer side wall of the base 7, and the number of the limiting grooves 75 can be one or two or more, and the present embodiment is not limited in any way.

Next, the labyrinth ventilation assembly of the present embodiment:

in a first alternative embodiment: the labyrinth ventilation assembly comprises only the air guide 8 provided in the hollow cavity 71. The air guide 8 is formed with air flow passages which are arranged in a zigzag manner and are used for communicating with the ventilation holes 77 at the two ends of the base 7 respectively.

The air guide 8 is made of rubber, and can be in sealing fit with the hollow cavity 71 of the base 7 through the side surface, so that the lubricant can be prevented from leaking from the side surface of the air guide 8.

In general, the term "labyrinth" refers to a structure that is tortuous, not a straight passage, i.e., a gas flow passage that is defined in this embodiment to be in a tortuous arrangement. As an alternative case, taken in conjunction with the drawings herein, the air flow passage employed in the present embodiment includes a plurality of air grooves 81 provided in the same number on both side end surfaces of the air guide 8 in the axial direction of the automobile hub cover, respectively, and a plurality of communication holes 826 connecting the plurality of air grooves 81 on both side end surfaces of the air guide 8; wherein each communication hole 826 is connected to any one of the air grooves 81 by bending, for example, by 90 degrees.

For example, the air groove 81 at the center of one side end face of the air guide 8 in the automobile hub axial direction is communicated with the air groove 81 at one non-center of the other side end face of the air guide 8 in the automobile hub axial direction through the communication hole 826, and the air groove 81 at the non-center of the one side end face is communicated with the two air grooves 81 of the other side end face through the communication hole 826, so that all the air grooves 81 and the communication hole 826 are one single-channel flow passage. When the two axial end surfaces of the air guide member 8 are pressed, the air groove 81 forms a channel, and a tortuous single channel air exhaust path is formed, in the air exhaust path, fluid is diverted 90 degrees through one groove and enters the hole, and then enters the next groove after being diverted 90 degrees, so that the circulation is realized, more fluid diversion is realized in a smaller space, the fluid resistance is effectively improved, the channel section is not required to be arranged too small (easy to be blocked), and the leakage of the lubricant can be effectively restrained.

Based on this structure, the two side end surfaces of the air guide 8 are respectively abutted against the bottom plate 72 and the cover plate 76, and the ventilation holes 77 on the bottom plate 72 and the cover plate 76 are only required to be communicated with the air grooves 81 on the two side end surfaces of the air guide 8, so that the ventilation requirement can be met. And since the air flow channels in the air guide 8 are arranged in a meandering manner, it is possible to increase the resistance to the flow of lubricant, thereby reducing the risk of leakage of lubricant.

In a second alternative embodiment, the labyrinth ventilation assembly comprises, in addition to the air guide 8 of the first alternative embodiment, a support 9 arranged on the side of the air guide 8 facing the vehicle hub in the axial direction of the vehicle hub cover; and the support 9 is provided therein with an air flow passage for communicating the air passage with the ventilation hole 77.

Based on this structure, the air guide 8 is directly abutted against the cover 76, and the support 9 is disposed between the air guide 8 and the bottom plate 72, that is, directly contacting the bottom plate 72 is the support 9.

For the specific structure of the support 9 employed here, the support 9 is exemplified in one case in connection with the accompanying drawings:

the support 9 includes a base plate 91 for abutting against the air guide 8, and an annular stopper 93 provided on the side of the base plate 91 facing away from the air guide 8 for abutting against the bottom plate 72. The end surface of the substrate 91 abutting against the air guide 8 is preferably a flat end surface, so that the joint of the air guide 8 and the substrate 91 is in sealing fit. Based on this, the flow path includes at least one through hole 92 provided on the base plate 91 and at least one ventilation groove 94 provided on the edge of the annular stopper 93 abutting the bottom plate 72, which communicates the through hole 92 and the ventilation hole 77; and a hollow cavity communicating the through hole 92 and the vent groove 94 is formed in the annular stopper 93. The through holes 92 are used for communicating the hollow cavity with the air flow channel of the air guide 8. In this structure, a plurality of through holes 92 may be provided on the base plate 91 in theory, but this embodiment is considered to be used for increasing the liquid resistance and reducing the leakage risk of the lubricant on the basis of satisfying the normal circulation of the air flow, and this embodiment only provides a through hole 92 communicating with the air flow channel of the air guide member 8 on the base plate 91, and the through hole 92 at this time is preferably provided at the center of the circular base plate 91, and the hollow cavity at this time is a cylindrical cavity with the through hole 92 as the axis, based on this structure, a plurality of ventilation slots 94 on the annular stop portion 93 are all communicated to the same through hole 92 through the hollow cavity.

On the basis of the above structure, in order to further reduce the risk of lubricant leakage, the present embodiment is further designed as follows:

the bottom plate 72 is provided with an annular stop 73 protruding towards the support 9; and an annular stop 93 adapted to be inserted into the stop 73, and when the annular stop 93 abuts against the end plate of the hollow cavity 71 facing the hub of the automobile, there is a gap between the stop 73 and the base plate 91 adapted to allow the passage of an air flow. At this time, for the air flow from the inner side of the automobile hub cover, the air flows first through the vent hole 77 in the bottom plate 72 to the gap between the stopper 73 and the base plate 91, then flows to the vent groove 94 of the annular stopper 93, then flows to the hollow cavity, finally flows uniformly to the through hole 92 in the base plate 91, and then flows into the air flow passage of the air guide 8 through the through hole 92. In this way, the annular stop 93 and the stop 73 cooperate to form a tortuous path between the support 9 and the base 72, so that the risk of lubricant leakage is simultaneously reduced without affecting the airflow.

For the above structure, it is further improved that two annular stop portions 93 are disposed on the end face of the base plate 91 facing the bottom plate 72, and the annular stop portions 93 are concentrically and alternately distributed, and a plurality of ventilation grooves 94 are disposed on the edge of each annular stop portion 93 abutting against the bottom plate 72 to meet the use requirement of airflow circulation. Such a design is also intended to further reduce the risk of leakage of lubricant.

In a third alternative embodiment, the labyrinth ventilation assembly comprises, in addition to the air guide 8 and the support 9 of the second alternative embodiment, a support 9 between the air guide 8 and the cover 76, whereby the same structure is used for the support 9 on each side of the air guide 8, in view of the reduction of production costs, i.e. the structure of the support 9 of the second alternative embodiment is suitable for this embodiment.

Based on this structure, it is necessary to explain that, also in the case where the problem of preventing leakage of lubricant is to be taken as an example, in combination with the case where the support member 9 is provided with two annular stoppers 93 toward the side of the cover plate 76, the present embodiment provides the vent holes 77 on the cover plate 76 on the outer side of the annular stoppers 93 located on the outermost ring on the corresponding support member 9, that is, for the air flow flowing through the air guide member 8 to the support member 9 abutting the cover plate 76, it is necessary to pass through the vent grooves 94 on the two annular stoppers 93 in sequence, and then to be finally discharged to the outside of the automobile hub cover through the vent holes 77 on the cover plate 76 (as shown in fig. 8, the path H is the flow path of the air flow).

Here, by providing the supporting member 9 between the cover plate 76 and the air guide member 8, and then providing two annular stop portions 93 on the supporting member 9, even if rainwater enters the base 7 through the vent holes 77 on the cover plate 76, the rainwater will be stopped by the two annular stop portions 93, and then flow along the radial direction of the annular stop portions 93 due to the gravity of the rainwater, and finally flow out from the vent holes 77 on the cover plate 76 to the outside of the base 7 (the path K shown in fig. 7 is the flow path of the rainwater in the vent plug), that is, the supporting member 9 provided between the cover plate 76 and the air guide member 8 in this embodiment has the effect of preventing the rainwater from entering the automobile hub cover for the whole vent plug.

To sum up, in this embodiment, by arranging a supporting member 9 at two sides of the air guide member 8, the hollow cavity 71 of the integral base 7 can be divided into a buffer cavity and a waterproof cavity, the specific bottom plate 72 and the corresponding supporting member 9 form the buffer cavity for temporarily storing part of the lubricant, so as to prevent the lubricant from directly entering the air flow channel of the air guide member 8 and being discharged, and the supporting member 9 and the cover plate 76 form the waterproof cavity, so as to prevent external rainwater, car washing water and the like from directly entering the air flow channel of the air guide member 8. In particular, in the case where the vent hole 77 is provided at the edge of the end of the base 7 facing the hub side of the automobile and extends to the bottom plate 72, after the pressure release of the automobile hub cover is completed, the lubricant entering the buffer chamber can be returned to the inside of the automobile hub cover from the bottom plate 72 and the vent hole 77 on the base 7.

Example 2:

referring to fig. 1 to 21, in addition to the vent plug of embodiment 1, this embodiment provides a car hub cover, including: a hubcap body 1, an oil deflector cap 2 sealingly coupled to the hubcap body 1, a gland 3 coupled to the hubcap body 1 for compressing the oil deflector cap 2 onto the hubcap body 1, and the vent plug of example 1 coupled to both the gland 3 and the oil deflector cap 2. The hub cover main body 1 is used for being matched with an automobile hub. The oil level cover 2 and the gland 3 are communicated with an assembly hole for matching and connecting an air plug.

The following details of the components are the hub cap body:

the hub cover body is of a generally tubular structure, a cavity is formed in the middle, and penetrates through two ends of the hub cover body, one end of the hub cover body is used for being matched with the oil level cover 2 and the gland 3, and the other end of the hub cover body is used for being matched with an automobile hub. In order to facilitate the coupling of the hubcap body to the hub of the vehicle, the end of the hubcap body 1 remote from the pressure cover 3 is here, in an alternative embodiment, formed with a threaded portion 11 for coupling with the hub. In yet another alternative embodiment, the end of the hubcap body 1 remote from the gland 3 is formed with a connecting ring 12 for mating with the hub; and the attachment ring 12 is adapted to be securely attached to the hub by means of a locking member such as, but not limited to, a bolt.

In combination with the use requirement of the conventional hub cover assembly, a pressure relief opening 13 communicated with the cavity is formed on the side wall of the hub cover body, the pressure relief opening 13 is switched between a blocking state and an opening state through a screw plug 14, and the pressure relief opening 13 can be used for adding or releasing lubricant.

Further, the oil level cap 2:

generally, the oil level cover 2 is a circular ring-like structure, and the material is, for example, but not limited to, transparent plastic or glass. At least one shaft end surface of the oil level cover 2 is provided with an observation area, and a liquid level line 21 and a mark 22 are arranged on the observation area. The observation area is used to observe the lubricant inventory within the automotive hubcap.

In order to meet the sealing assembly requirements of the oil pointer cover 2, a sealing surface 15 for sealing and matching the oil pointer cover 2 is formed at one end of the hub cover main body 1. Here, in order to effectively ensure a sealing fit between the oil pointer cover 2 and the sealing surface 15, a sealing ring 4 may be optionally interposed between the oil pointer cover 2 and the sealing surface 15.

In addition, in an alternative implementation case, in consideration of improving convenience and efficiency in assembling between the oil pointer cover 2 and the hub cover main body 1, quick positioning when the oil pointer cover 2 and the hub cover main body 1 are assembled is realized, at least one male limit portion 16 for matching with the oil pointer cover 2 may be further formed at one end of the hub cover main body 1, and at least one female limit portion 23 adapted to the at least one male limit portion 16 is prefabricated on the oil pointer cover 2. The number of the male limit portion 16 and the female limit portion 23 may be three, and the male limit portion 16 may be a groove structure, and the female limit portion 23 may be a protrusion structure, or may be a case of exchanging, which is not limited in this embodiment.

Again next gland 3:

in general, the gland 3 is also of annular configuration, and the gland 3 employed in this embodiment comprises an outer ring 31 and an inner ring 32, which are integrally connected by a plurality of spokes 33, for the purpose of exposing the liquid level line 21 and the logo 22 on the oil level cap 2. With this structure, the notches 34 exposing the liquid level line 21 and the sign 22 are formed by the adjacent spokes 33.

In addition, the gland 3 is attached to the hubcap body 1 by fasteners 5 such as, but not limited to, bolts to compress the oil deflector 2 between the gland 3 and the hubcap body 1. Whereas it is considered here that the gland 3 comprises an outer ring 31 and an inner ring 32, both the outer ring 31 and the inner ring 32 here bear against the oil deflector cap 2 to achieve a sealing fit between the gland 3 and the oil deflector cap 2.

Under the optional implementation condition, considering the convenience and high efficiency when improving and assembling between gland 3 and hub cover main part 1, realize the quick location when gland 3 and hub cover main part 1 are assembled, the oil pointer cover 2 of this embodiment still is equipped with unsmooth complex location structure between the terminal surface of gland 3 and gland 3. The positioning structure here may be a boss 25 provided at the end face of the oil deflector cap 2 facing the gland 3, and an adapting raised positioning groove 36 provided at the end face of the gland 3 facing the oil deflector cap 2. In more detail, the positioning groove 36 may be disposed on the outer ring 31 or the inner ring 32, which is not limited in any way, so long as the positioning structures on the oil indicator cover 2 and the gland 3 can be correspondingly matched to meet the requirement of the present embodiment.

Based on the above structure, the following is the following about the fitting of the vent plug with the gland 3 and the oil level cap 2:

a sealing ring 78 is sleeved in the limiting groove 75 and is used for sealing and matching with the inner wall of the oil level cover 2 corresponding to the assembly hole; the spacing portion 74 is suitable for being pressed from both sides tightly between gland 3 and oil level lid 2, is pressed from both sides in the centre by gland 3 and oil level lid 2 through spacing portion 74, realizes the rigidity spacing, can prevent that the breather plug from getting into hub lid main part 1, also can prevent that the breather plug from outwards droing, has spacing portion 74, alright not need through sealing washer 4 and oil level lid 2 tight fit spacing, thereby can reduce the installation dynamics with the less of sealing washer 4's interference design, the installation of being convenient for more.

Finally, it must also be mentioned that, in order to meet the air flow requirements of the vent plug application in a particular vehicle hub cover, in one embodiment, the end plate of the base 7 facing away from the vehicle hub (i.e. the cover plate 76) is integrally formed on the cover plate 3, i.e. in this case, for the integral vent plug, the cover plate 76 need not be provided in addition, but rather the cover plate 3 serves the function of the cover plate 76. In another embodiment, the cover 3 is formed with a relief hole 37 for exposing the end plate of the base 7 facing away from the automobile hub, so that the vent plug of embodiment 1 is assembled into the automobile hub cover as a structural functional component, and the use requirement of the cover 76 can be met only by designing the relief hole 37 on the cover 3, so that the vent plug in this embodiment does not need to integrally disassemble the cover 76 when the vent plug is required to be overhauled, and the cover 76 can be disassembled only through the relief hole 37, thereby the overhauling process is more convenient.

The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present utility model, and are more fully described herein with reference to the accompanying drawings, in which the principles of the present utility model are shown and described, and in which the general principles of the utility model are defined by the appended claims.

In the description of the present utility model, it should be understood that the terms "orientation" or "positional relationship" are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present utility model, unless expressly stated or limited otherwise, a first feature may include first and second features directly contacting each other, either above or below a second feature, or through additional features contacting each other, rather than directly contacting each other. Moreover, the first feature being above, over, and on the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being below, beneath, and beneath the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is less level than the second feature.

Claims

1. A vent plug adapted for use in an automotive hubcap comprising: a base for fixing in a hub cover of an automobile and a labyrinth ventilation assembly arranged in the base; wherein the method comprises the steps of

2. The vent plug of claim 1, wherein the labyrinthine vent assembly comprises a support member further comprising a side of the air guide facing the automobile hub in the axial direction of the automobile hub cover; and

3. The vent plug of claim 1, wherein the labyrinthine vent assembly comprises a pair of support members disposed on either side of the air guide in the axial direction of the automotive hubcap; and

4. A vent plug according to claim 3, wherein the pair of support members are identical in construction.

5. A vent plug according to claim 2 or 4, wherein the support member comprises a base plate for abutment with the air guide and an annular stop provided on a side of the base plate facing away from the air guide for abutment with the respective end plate;

6. The vent plug according to claim 5, wherein an end plate of the hollow cavity facing the automobile hub is provided with an annular stop protruding towards the air guide; and

7. A vent plug according to any one of claims 1 to 3, wherein at least one of the two end plates at either end of the hollow cavity is removably mated with the base.

8. A vent plug according to any one of claims 1 to 3 wherein the end plates at each end of the hollow cavity are provided with vent holes communicating with the hollow cavity along the axial direction of the automobile hub cap.

9. A vent plug according to any one of claims 1 to 3, wherein the air flow passage includes a plurality of air grooves which are provided in the same number on both side end surfaces of the air guide in the axial direction of the automobile hub cover, respectively, and a plurality of communication holes which connect the plurality of air grooves on both side end surfaces of the air guide; wherein the method comprises the steps of

Each communication hole is connected with any air groove in a bending way.

10. An automotive hubcap, comprising: a hubcap body, an oil deflector cap sealingly coupled to the hubcap body, a gland coupled to the hubcap body for compressing the oil deflector cap against the hubcap body, and a vent plug according to any one of claims 1-9 coupled to the gland and the oil deflector cap simultaneously;

11. The automotive hubcap of claim 10, wherein one end of the hubcap body is formed with a sealing surface that sealingly engages the oil deflector; and

12. The automotive hub cover of claim 11, further comprising a seal ring sandwiched between the oil indicator cover and the sealing interface.

13. The automotive hubcap of any one of claims 10 to 12, wherein the gland is connected to the hubcap body by fasteners to compress the oil cover between the gland and the hubcap body.

14. The automotive hubcap of any one of claims 10 to 12, wherein an end plate of the base facing away from the automotive hub is integrally formed on the gland; or alternatively