CN216045351U - Gear box breather plug and vehicle with same - Google Patents

Abstract

The utility model relates to a gearbox breather plug and a vehicle with the same. The gearbox breather plug is internally provided with a breather pipe, the gearbox breather plug comprises a breather plug cap, the breather plug cap comprises a plug cap pipe body and a protective cover, the breather pipe is formed in the plug cap pipe body, the protective cover is sleeved outside one end, far away from the gearbox, of the plug cap pipe body, so that a first cavity is formed between the inner side wall of the protective cover and the outer side wall of the plug cap pipe body, the first cavity is communicated with the outside, the first cavity and the breather pipe are separated through a partition plate, a notch is formed in the partition plate, an oil blocking curtain is formed in the notch, one end of the oil blocking curtain is connected with the partition plate, the other end of the oil blocking curtain is provided with a free end, the free end of the oil blocking curtain deviates from the partition plate when air pressure difference is set in the two sides of the partition plate, and the first cavity is communicated with the outside. The gearbox breather plug provided by the utility model can achieve the effects of dust prevention and oil leakage prevention while ensuring the ventilating effect.

Description

Gear box breather plug and vehicle with same

Technical Field

The utility model relates to the technical field of automobiles, in particular to a gearbox breather plug and a vehicle with the gearbox breather plug.

Background

The car is in the use, and gearbox during operation such as derailleur, reduction gear can produce the temperature fluctuation, and the inside air of gear box will form the pressure differential because expend with heat and contract with cold with the external world, if the pressure differential is too big, the gear box sealing member will reduce life because increase wearing and tearing, and in order to make the inside and external atmospheric pressure of gear box keep balance with the air in the car gear box simultaneously with external atmosphere intercommunication, the car gear box all can design an air breather and ventilate the stopper promptly. The design of the vent plug can also reduce the probability that moisture and dust in the external atmosphere enter the gear box, and meanwhile, the oil content in the oil mist discharged to the outside by the gear box can be reduced, the loss of lubricating oil is reduced, and the atmosphere pollution is prevented.

The gearbox in the prior art basically achieves the ventilation purpose by adopting the following three modes of ventilation plug structures:

first, the normally closed type breather plug such as the check valve is difficult to enter the gear box in the environment with extremely low temperature in winter, and larger negative pressure can appear in the gear box to cause the sealing element to lose efficacy.

The second, normally open breather plug, some can adopt the maze, and some can adopt the respiratory tube, and the cost of complicated maze processing manufacturing is than higher, and longer respiratory tube needs great arrangement space, needs the installation fixed, and the cost is higher and increase assembly process.

Third, semi-open vent plugs, usually a V-shaped cut is manually cut on a cylindrical thin wall, such vent plugs are normally open theoretically, but actually require a small pressure difference V-shaped vent to open, air in a cavity can shrink after parking in winter under extremely cold conditions, and because the cylindrical structure disperses the pressure perpendicular to the cylindrical surface (arch bridge principle), the V-shaped vent is difficult to open inwards, a large negative pressure can be formed in the cavity, and then a sealing element or other parts are broken down, and meanwhile, due to manual cutting, the consistency of the V-shaped vent is difficult to guarantee.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a gear box vent plug and a vehicle having the same, in which the vent plug can achieve the effects of dust prevention and oil leakage prevention while ensuring the ventilation effect.

The utility model provides a gear box vent plug, a vent pipeline is formed in the vent plug, the gear box vent plug comprises a vent plug cap, the vent plug cap comprises a plug cap tube body and a protective cover, the vent pipeline is formed in the plug cap tube body, the protective cover is sleeved outside one end of the plug cap tube body far away from the gear box, so that a first cavity is formed between the inner side wall of the protective cover and the outer side wall of the plug cap tube body, the first cavity is communicated with the outside, the first cavity and the vent pipe are separated by a clapboard, the partition plate is provided with a notch so as to form an oil baffle curtain in the notch, one end of the oil baffle curtain is connected with the partition plate, the other end of the oil baffle curtain is provided with a free end, and the free end of the oil baffle curtain deviates from the partition plate when a set air pressure difference is formed on two sides of the partition plate, so that the first cavity is communicated with the outside.

Further, the stopper cap body comprises a first body and a second body connected with the first body, and the area of the cross section of the first body in the length direction perpendicular to the stopper cap body is larger than the area of the cross section of the second body in the length direction perpendicular to the stopper cap body.

Further, the second pipe body is in a semi-cylindrical shape, and the partition plate is located on the longitudinal section of the semi-cylindrical shape.

Further, the end cover that this safety cover kept away from this first body from this second body is located on this second body, and the bottom surface of this safety cover links to each other with the tip of this second body, and the distance between the terminal surface that is close to this second body one end from the bottom surface of this safety cover to this first body is less than the degree of depth of safety cover, is formed with the gap between the inside wall of this safety cover and the lateral wall of this first body.

Further, this gear box breather plug still includes the cock body of ventilating, and this cock body of ventilating includes third body and fourth body, is formed with the barb on the lateral wall of this third body, and the lateral wall of this third body passes through interference fit and links to each other with this cock cap of ventilating, is formed with the back-off that is used for combining with the gear box on this fourth body.

Further, this stopper body of ventilating still includes a plurality of oil baffle, and a plurality of these oil baffle set up on the inside wall of this third body or fourth body along the length direction of this stopper body of ventilating, all are formed with the link of being connected with this stopper body of ventilating on every this oil baffle and keep away from the free end of this linkage segment, and every free end that should keep off the oil baffle all falls on adjacent oil baffle at this projection of ventilating match body length direction.

Further, each oil baffle plate extends towards the direction of the reverse buckle in an inclined mode.

Furthermore, the vent plug cap is made of rubber materials, and the vent plug body is made of plastic materials.

Further, the notch is V-shaped, U-shaped, W-shaped, square or rectangular.

The utility model further provides a vehicle comprising the gearbox breather plug.

Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the partition plate is formed in the vent plug cap, the V-shaped notch is formed in the partition plate, the oil blocking curtain is formed in the notch, one end of the oil blocking curtain is connected with the partition plate, the other end of the oil blocking curtain is provided with the free end, and the oil blocking curtain can be opened and closed by adjusting the self pressure difference formed by the heat expansion and the cooling of air in the gear box and the external pressure difference, so that the dustproof and oil leakage prevention effects can be achieved while the ventilation effect is ensured. Further, through the arrangement of the oil baffle plate in the vent plug body, a labyrinth-shaped oil return structure is formed in the vent plug body, and oil leakage can be further prevented.

Drawings

FIG. 1 is a schematic axial side view of a gearbox breather plug in an example of the present invention.

Fig. 2 is an exploded view of the vent plug of the gear box of fig. 1.

Figure 3 is a partial cross-sectional view of the vent plug cap of figure 1.

Figure 4 is a side view of the vent plug cap of figure 2 at an angle.

Fig. 5 is a schematic view of the cross-sectional structure in the V-V direction in fig. 4.

Figure 6 is a side view of the vent plug cap at another angle.

Fig. 7 is a schematic sectional view in the direction of VII-VII in fig. 6.

Fig. 8 is a side view of the vent plug of the gear box of fig. 1.

Fig. 9 is a schematic sectional view along direction IX-IX in fig. 8.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The specific embodiments described herein are merely illustrative of the utility model and are not to be construed as limiting the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model aims to provide a gearbox breather plug and a vehicle with the same.

Fig. 1 is a schematic axial side view of a vent plug of a gear box according to an embodiment of the present invention, fig. 2 is a schematic exploded view of the vent plug of the gear box of fig. 1, fig. 3 is a partial sectional view of a vent plug cap of fig. 1, fig. 4 is a schematic side view of the vent plug cap of fig. 2 at one angle, fig. 5 is a schematic side view of the vent plug cap of fig. 4 at a V-V direction, fig. 6 is a schematic side view of the vent plug cap at another angle, and fig. 7 is a schematic side view of the vent plug cap of fig. 6 at a VII-VII direction. As shown in fig. 1 to 7, a gear box breather plug provided by an embodiment of the present invention includes a breather plug cap 10 and a breather plug body 20, the breather plug body 20 is connected to a gear box (not shown), the breather plug cap 10 is disposed at an end of the breather plug body 20 away from the gear box (not shown), a breather pipe 11 communicated with the gear box is formed in the gear box breather plug, the breather plug cap 10 includes a plug cap pipe 12 and a protective cover 13, the breather pipe 11 is formed in the plug cap pipe 12, the protective cover 13 is sleeved outside the end of the plug cap pipe 12 away from the gear box, so that a first cavity 14 is formed between an inner side wall of the protective cover 13 and an outer side wall of the plug cap pipe 12, the first cavity 14 is communicated with the outside, the first cavity 14 is spaced from the breather pipe 11 by a partition plate 15, a notch 16 is formed in the partition plate 15, and an oil blocking curtain 17 is formed in the notch 16 (see fig. 3 and 7), one end of the oil baffle 17 is connected with the partition 15, and the other end is formed with a free end, the free end of the oil baffle deviates from the partition 15 when a set air pressure difference is formed on the two sides of the partition 15, so that the first cavity 14 is communicated with the outside.

In the embodiment, by forming the cut 16 on the partition 15 between the first cavity 14 and the vent pipe 11, and forming an oil blocking curtain 17 in the cut 16 on the partition 15, since only one end of the oil blocking curtain 17 is connected with the partition 15, and the other part is separated from the partition 15, the oil blocking curtain 17 can swing inside and outside as a "door curtain", when the pressure between the vent pipe 11 and the first cavity 14 is balanced, that is, the pressure difference between the two is smaller than the opening pressure of the oil blocking curtain 17, the oil blocking curtain 17 keeps a closed state, which can make the vent plug of the gearbox have better dustproof and waterproof effects when the pressure is balanced; when the pressure difference between the pressure in the vent pipe 11 and the pressure in the first cavity 14 is greater than the opening pressure of the oil blocking curtain 17, the free end of the oil blocking curtain 17 deviates from the partition plate 15 due to the action of the pressure, that is, the oil blocking curtain 17 is opened, so that the first cavity 14 is communicated with the vent pipe 11, and the pressure difference between the interior of the gear box and the outside can be ensured to be always within a certain range. That is, this breather plug can be more when guaranteeing the ventilation effect, can reach dustproof leak protection oily effect again.

Further, in the present embodiment, the notch may have a V-shape, a U-shape, a W-shape, a square shape, or a rectangular shape.

Further, the stopper cap tube 12 includes a first tube 121 for connecting with the vent plug 20 and a second tube 122 at an end of the first tube 121 remote from the vent plug 20. The cross-sectional area of the first tube 121 along the direction perpendicular to the length direction of the plug cap tube 12 is larger than the cross-sectional area of the second tube 122 along the direction perpendicular to the length direction of the plug cap tube 12, so that the first cavity 14 can have a larger volume, which is beneficial to the balance between the gear box and the external air pressure. More specifically, the second tube 122 has a semi-cylindrical shape, and the partition 15 is located on the longitudinal section of the semi-cylindrical shape. That is, in this embodiment, the partition 15 is flat, which allows the cut 16 to be cut by a machine, ensuring consistency, and the vents can be opened both outward and inward.

The end, far away from the first body 121, of the protective cover 13 from the second body 122 is covered on the second body 122, the bottom surface of the protective cover 13 is connected with the end part of the second body 122, the distance from the bottom surface of the protective cover 13 to the end surface, close to one end of the second body 122, of the first body 121 is smaller than the depth of the protective cover 13, a gap is formed between the inner side wall of the protective cover 13 and the outer side wall of the first body 121, and through the arrangement, dust can be further prevented from entering the first cavity 14. More specifically, a constricted portion 18 is formed at the end of the first tube 121 facing the second tube 122, the outside diameter of the constricted portion 18 is smaller than that of the first tube 121, the open end of the protective cover 13 extends into the constricted portion 18, and the gap is formed between the inner side wall of the protective cover 13 and the outer side wall of the constricted portion 18.

Further, a mark 131 is provided on the outer side wall of the protective cover 13, and the mark 131 is used for marking the position of the cut 16 to facilitate the installation of the vent plug of the gearbox.

Fig. 8 is a side view of the vent plug of the gear box of fig. 1, and fig. 9 is a cross-sectional view in the direction IX-IX of fig. 8. With reference to fig. 1, 2, 8 and 9, the vent plug 20 includes a third tube 21 and a fourth tube 22 connected to the third tube 21. The third tube 21 extends into the second tube 122 of the vent cap 10 to connect the vent body 20 to the vent cap 10. The fourth tube 22 is connected to a gear box (not shown). A positioning boss 23 is provided at a joint between the third tube 21 and the fourth tube 22.

More specifically, be formed with barb 24 on the lateral wall of third body 21, outside third body 21 was located through interference fit cover to second body 122, foretell barb 24 supported on the inside wall of second body 122, prevented that third body 21 from deviating from second body 122. An undercut 25 is also provided on the outer side wall of the fourth tube 22 to facilitate connection of the vent plug body 20 to a gear box (not shown). In order to ensure the air tightness between the fourth pipe 22 and the gear box, two annular grooves 26 are also provided on the outer side wall of the fourth pipe 22, and O-ring seals 27 are provided in the annular grooves 26.

Further, the vent plug 20 further includes a plurality of oil baffles 28, and the plurality of oil baffles 28 are disposed on the inner sidewall of the third tube 21 along the length direction of the vent plug 20, but not limited thereto, and may also be disposed on the fourth tube 22 or on the inner sidewalls of the third tube 21 and the fourth tube 22 simultaneously. Each oil baffle 28 is formed with a connecting end 281 connected to the vent plug 20 and a free end 282 far from the connecting end 281, and a projection of the free end 282 of each oil baffle 28 in a length direction of the vent plug 20 falls on the adjacent oil baffle 28. That is, when the gas passes through the gap between the free end 282 of one oil baffle 28 and the inner side wall of the third tube 21 or the fourth tube 22, the gas is blocked by the other oil baffle 28, and the oil baffles 28 form a labyrinth gas path, so that the oil in the gas can meet the condensation on the oil baffle 28. More specifically, each oil deflector 28 extends obliquely downward so that oil that condenses on the oil deflector 28 falls back into the gear box. Through the arrangement, oil can conveniently flow back, and a gap between the two oil baffle plates 28 can be reduced. The oil deflector 28 is combined with the cutout 16 to prevent oil from flowing out of the vent plug cap 10 through the oil deflector 28 when the vehicle is accidentally tipped over. Even if oil flows out between the oil baffle plates 28, the oil baffle 17 needs a certain pressure to open when the oil adheres to the partition 15 due to the oil baffle 17, which can further increase the effect of preventing oil leakage. Further, through set up oil baffle 28 in the cock body 20 of ventilating, can form labyrinth structure in the cock body 20 of ventilating, and can make the cock body 20 of ventilating and oil baffle 28 integrated into one piece, the two can carry out the demolding through a pair of mould, and this can reduce the die sinking expense, reduce cost, can solve the problem that solitary cap stopper 10 loses the oil leak again.

Further, in the present embodiment, the vent plug cap 10 may be made of a rubber material, and the vent plug body 20 may be made of a plastic material.

In summary, in the present invention, the partition 15 is formed in the vent plug cap 10, and the cut 16 is formed on the partition 15, so as to form the oil blocking curtain 17 with one end connected to the partition 15 and the other end being a free end in the cut 16, and the oil blocking curtain 17 can adjust the opening and closing of itself by the thermal expansion and cooling of the air in the gear box and the pressure difference formed by the outside, which can achieve the effects of dust and oil prevention while ensuring the ventilation effect.

Further, by providing the oil baffle 28 in the breather plug body 20, a labyrinth-like oil return structure is formed in the breather plug body 20, which can further prevent leakage of oil. In addition, the oil baffle plate 28 and the vent plug body 20 can be integrally formed in the arrangement mode, and the oil baffle plate and the vent plug body can be demoulded through a pair of dies, so that the die opening cost can be reduced, the cost can be reduced, and the problem that the independent vent cap plug 10 leaks oil can be solved.

Further, make second body 122 be the semicylindrical, baffle 15 sets up on this semicylindrical longitudinal section, and this can make baffle 15 be the plane setting, can tailor through the machine, guarantees the uniformity, and the blow vent can outwards be opened, can inwards open again.

Further, by providing a plurality of baffles 28 within the vent plug body 20, the free end 282 of each oil deflector 28, as projected in the length direction of the vent plug body 20, falls upon the adjacent oil deflector 28. This can reduce the gap between the two oil deflector plates 28. After the oil baffle plates 28 are combined with the notches 16, even if a vehicle is turned over accidentally, the lubricating oil has certain viscosity and is not easy to leak from a small gap between the two oil baffle plates 28, and the leaked lubricating oil can jack the notches 16 after reaching certain pressure, so that potential safety risks caused by large-amount leakage of the lubricating oil are avoided.

The present invention also provides a vehicle including the above-mentioned gearbox breather plug, and please refer to the prior art for other structural features of the vehicle, which will not be described herein again.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A gearbox breather plug, a breather pipeline is formed in the breather plug, and the gearbox breather plug is characterized by comprising a breather plug cap, the vent plug cap comprises a plug cap tube body and a protective cover, the vent pipeline is formed in the plug cap tube body, the protective cover is sleeved outside one end of the plug cap tube body, which is far away from the gear box, so that a first cavity is formed between the inner side wall of the protective cover and the outer side wall of the plug cap tube body, the first cavity is communicated with the outside, the first cavity and the vent pipeline are separated by a partition plate, a notch is formed on the partition plate, so that an oil baffle curtain is formed in the cut, one end of the oil baffle curtain is connected with the partition plate, the other end of the oil baffle curtain is provided with a free end, and the free end of the oil baffle curtain deviates from the partition plate when a set air pressure difference is formed on two sides of the partition plate, so that the first cavity is communicated with the outside.

2. The gearbox breather plug of claim 1, wherein the plug cap body includes a first body and a second body connected to the first body, wherein a cross-section of the first body along a direction perpendicular to a length of the plug cap body has a larger area than a cross-section of the second body along a direction perpendicular to the length of the plug cap body.

3. The gearbox breather plug of claim 2, wherein the second tube body is semi-cylindrical in shape and the baffle is located on a longitudinal cross-section of the semi-cylindrical shape.

4. The gearbox breather plug of claim 2, wherein the protective cover covers the second tube from the end of the second tube remote from the first tube, the bottom surface of the protective cover is connected to the end of the second tube, the distance from the bottom surface of the protective cover to the end surface of the first tube near the end of the second tube is less than the depth of the protective cover, and a gap is formed between the inner side wall of the protective cover and the outer side wall of the first tube.

5. The gearbox breather plug of claim 1, further comprising a breather plug body including a third tube having barbs formed on an exterior sidewall thereof, the third tube having an exterior sidewall thereof coupled to the breather plug cap by an interference fit, and a fourth tube having an undercut formed thereon for engaging with a gearbox.

6. The gearbox breather plug of claim 5, wherein the breather plug body further comprises a plurality of oil baffle plates, the plurality of oil baffle plates are arranged on the inner side wall of the third pipe body or the fourth pipe body along the length direction of the breather plug body, each oil baffle plate is provided with a connecting end connected with the breather plug body and a free end far away from the connecting section, and the projection of the free end of each oil baffle plate in the length direction of the breather plug body falls on the adjacent oil baffle plate.

7. The gearbox breather plug of claim 6, wherein each oil deflector extends obliquely in a direction of the undercut.

8. The gearbox breather plug of claim 5, wherein the breather plug cap is made of a rubber material and the breather plug body is made of a plastic material.

9. The gearbox breather plug of claim 1, wherein the cutout is V-shaped, U-shaped, W-shaped, square, or rectangular.

10. A vehicle comprising a gearbox breather plug according to any of claims 1 to 9.

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