CN220850678U - Waterproof breathable cap for gearbox - Google Patents

Abstract

The utility model relates to a waterproof type ventilation cap for a gearbox, which comprises a ventilation cap body, a connecting pipe and a check valve, wherein a cavity is formed in the ventilation cap body, internal threads are formed in the outer side of the ventilation cap body, the check valve is arranged in the ventilation cap body, a displacement mechanism is arranged in the check valve, the connecting pipe is in threaded connection with the outer side of the ventilation cap body, external threads are arranged in the connecting pipe, a third ventilation hole is formed in the bottom of the check valve, and second ventilation holes are formed in the top of the check valve at equal intervals. The utility model solves the problems that under the condition that water exists outside the existing gearbox ventilation cap, the water can permeate into the gearbox through the ventilation cap, so that lubricating oil in the gearbox is polluted, then oxygen and other chemical substances are contained in the water, the water can react with metal parts after entering the gearbox, corrosion and corrosion of the parts are caused, and the gearbox is sprayed with oil, so that the practicability of the device is reduced.

Description

Waterproof breathable cap for gearbox

Technical Field

The utility model relates to the technical field of breathable caps, in particular to a waterproof breathable cap for a gearbox.

Background

The transmission ventilation cap is a part of an automobile transmission and is used for protecting the air tightness inside the transmission. The background technology mainly relates to the following aspects: the air tightness requirement of the gearbox: the automobile gearbox is a sealed system, and needs to keep the lubricating oil inside from leaking and prevent external dust, moisture and the like from entering the inside of the gearbox, and the function of the ventilation cap is that: the ventilation cap is positioned at a certain part of the gearbox, and the gas exchange inside and outside the gearbox is realized through the special structure and materials, so that the pressure balance inside the gearbox is kept, and in a word, the background technology of the ventilation cap of the gearbox mainly relates to the aspects of the air tightness requirement of the gearbox, the action of the ventilation cap, the material selection, the structural design and the like, and the gas exchange inside and outside the gearbox can be ensured through reasonable design and selection, so that the normal work of the gearbox is ensured.

The existing gearbox ventilation cap can appear that water permeates the inside of gearbox through ventilation cap under the condition that there is water in the outside, can lead to the lubricating oil in the gearbox to be polluted, then contains oxygen and other chemicals in the water, can react with metal parts after entering the gearbox, leads to corrosion and corrosion of spare part, and can let the gearbox appear the phenomenon of oil spout to the practicality of device has been reduced.

Disclosure of utility model

In view of the foregoing problems of the prior art, a primary object of the present utility model is to provide a waterproof type air-permeable cap for a transmission.

The technical scheme of the utility model is as follows: including ventilative cap body, connecting pipe and check valve, the cavity has been seted up to the inside of ventilative cap body, the outside of ventilative cap body is provided with the internal thread, the check valve sets up the inside at ventilative cap body, the inside of check valve is provided with displacement mechanism, connecting pipe threaded connection is in the outside of ventilative cap body, the inside of connecting pipe is provided with the external screw thread, the third vent has been seted up to the bottom of check valve, the second vent has been seted up to the top equidistance of check valve.

As a preferred implementation mode, the displacement mechanism comprises a chute, the chute is arranged in the check valve, a fixed plate is fixedly connected to the chute, a guide rod is slidably connected to the check valve, a displacement plate is fixedly connected to the bottom of the guide rod, a spring is fixedly connected between the displacement plate and the fixed plate, and a fourth air hole is formed in the fixed plate at equal intervals.

As a preferred implementation mode, the displacement mechanism further comprises a plug, the plug is fixedly connected to the bottom of the displacement plate, and the outer side of the plug is in contact with the inner wall of the third vent hole.

As a preferred embodiment, the diameter of the plug is equal to the diameter of the third vent.

As a preferred embodiment, the first ventilation holes are formed in the ventilation cap body at equal intervals.

As a preferred embodiment, the outer side of the breathable cap body is provided with bumps at equal intervals.

Compared with the prior art, the utility model has the advantages and positive effects that under the condition that the gearbox is pressureless, the plug is attached to the inner wall of the third vent hole under the action force of the spring, then the displacement plate is used for plugging the third vent hole, so that the third vent hole is closed, external water is prevented from entering the interior of the gearbox, when the gearbox needs to release pressure, the pressure enters the interior of the third vent hole and then generates an upward pushing force on the plug, the displacement plate is driven to move and simultaneously compress the spring and drive the guide rod to move, then gas is released from the third vent hole and reaches the cavity inside the ventilation cap body through the fourth vent hole and the second vent hole, then the gas is released from the interiors of the first vent holes, after the release is finished, the displacement plate and the plug are driven to move under the action force of the spring, and thus the third vent hole is closed, the phenomenon that the water permeates into the interior of the gearbox through the ventilation cap when the external water is met in the gearbox is avoided, the lubricating oil in the gearbox is polluted, then the oxygen and the water contains oxygen and the metal and then enters the gearbox, corrosion of other components and parts can be increased, and the practical problems are solved, and the corrosion of the device can occur.

Drawings

FIG. 1 is a schematic perspective view of a waterproof venting cap for a transmission case;

FIG. 2 is a schematic diagram of an exploded construction of a waterproof venting cap for a transmission of the present utility model;

FIG. 3 is a schematic diagram showing a front cross-sectional structure of a waterproof venting cap for a gearbox;

Fig. 4 is a schematic diagram showing a front cross-sectional structure of a check valve of a waterproof type air-permeable cap for a transmission.

Legend description: 1. a breathable cap body; 2. a bump; 3. a connecting pipe; 4. a first vent hole; 5. a second vent hole; 6. a guide rod; 7. a check valve; 8. a third vent hole; 9. a cavity; 10. a chute; 11. a fixing plate; 12. a spring; 13. a displacement plate; 14. a plug; 15. fourth air vent.

Detailed Description

The utility model will be further described with reference to the drawings and the specific embodiments

Examples

As shown in fig. 1 to 4, the present utility model provides a technical solution: including ventilative cap body 1, connecting pipe 3 and check valve 7, cavity 9 has been seted up to the inside of ventilative cap body 1, the outside of ventilative cap body 1 is provided with the internal thread, check valve 7 sets up the inside at ventilative cap body 1, the inside of check valve 7 is provided with displacement mechanism, connecting pipe 3 threaded connection is in the outside of ventilative cap body 1, the inside of connecting pipe 3 is provided with the external screw thread, third vent 8 has been seted up to the bottom of check valve 7, second vent 5 has been seted up to the top equidistance of check valve 7.

In this embodiment, firstly, install the check valve 7 inside the ventilative cap body 1, then dock ventilative cap body 1 and connecting pipe 3 through threaded connection, can be in confined state when the gearbox is pressureless through the check valve 7, protect the gearbox and avoid the normal operating under the circumstances that there is water in the outside, then when the gearbox needs to carry out relief pressure, check valve 7 has ventilative function again, gas release from the gearbox then gets into from the third gas vent 8 of check valve 7 bottom, then discharge from the second gas vent 5, finally discharge from the inside first air vent 4 of ventilative cap body 1, can not influence its normal relief pressure's operation in this way, in sum, can avoid because of the inside that the current gearbox ventilative cap is in the case of meeting outside water, can appear water infiltration gearbox through ventilative cap, can lead to the lubricating oil in the gearbox to be polluted, then contain oxygen and other chemicals in the water, can react with metal parts after getting into the gearbox, lead to corrosion and the corrosion of spare part, and the corrosion of the oil spout, and can let the gearbox appear the practicality of the device of increasing.

Wherein, displacement mechanism includes spout 10, and spout 10 is seted up in the inside of check valve 7, and the inside fixedly connected with fixed plate 11 of spout 10, the inside sliding connection of check valve 7 has guide bar 6, and the bottom fixedly connected with displacement board 13 of guide bar 6, fixedly connected with spring 12 between displacement board 13 and the fixed plate 11, fourth air vent 15 has been seted up to the inside equidistance of fixed plate 11.

The displacement mechanism further comprises a plug 14, the plug 14 is fixedly connected to the bottom of the displacement plate 13, and the outer side of the plug 14 is in contact with the inner wall of the third vent hole 8.

Wherein the diameter of the plug 14 is equal to the diameter of the third vent hole 8. Under the condition that the gearbox is pressureless, the plug 14 is attached to the inner wall of the third vent hole 8 under the action force of the spring 12, then the third vent hole 8 is plugged through the displacement plate 13, so that the ventilation cap body 1 forms a closed state, external water is prevented from entering the interior of the gearbox, when the gearbox needs to release pressure, the pressure enters the interior of the third vent hole 8 and then upwards pushes the plug 14, the displacement plate 13 is driven to move, the spring 12 is compressed and simultaneously the guide rod 6 is driven to move, then gas is released from the third vent hole 8, reaches the cavity 9 in the ventilation cap body 1 through the fourth vent hole 15 and the second vent hole 5, then the gas is released from the interiors of the first vent holes 4, after the release is finished, the displacement plate 13 and the plug 14 are driven to move under the action force of the spring 12, so that the third vent hole 8 is closed, and the practicability of the device is further improved.

Wherein, first air vent 4 has been offered to the inside equidistance of ventilative cap body 1. The first vent hole 4 is formed in the bottom of the ventilation cap body 1, so that external dust can be prevented from entering the ventilation cap body 1 through the first vent hole 4, the internal device is affected, and the limitation of the device is reduced.

Wherein, the outside equidistance of ventilative cap body 1 is provided with lug 2. When dismantling the ventilative cap body 1, can increase frictional force through a plurality of lugs 2 for more convenient dismantlement has thereby increased the convenience of device.

Working principle: firstly, install inside the ventilative cap body 1 through the check valve 7, then dock ventilative cap body 1 and connecting pipe 3 through threaded connection, make end cap 14 and the inner wall of third vent hole 8 laminate mutually under the effort through spring 12, avoided outside water to enter into the inside of gearbox, then, when the gearbox needs release pressure, enter into the inside of third vent hole 8 through pressure then produce an ascending push force to end cap 14, drive displacement board 13 and remove and carry out a compression to spring 12 simultaneously, then gaseous release through fourth vent hole 15 and second vent hole 5 reach cavity 9 in the ventilative cap body 1 from third vent hole 8, then gaseous release is gone out from the inside of a plurality of first vent holes 4, secondly, first vent hole 4 is seted up in the bottom of ventilative cap body 1, so can avoid outside dust to enter into the inside of ventilative cap body 1 through first vent hole 4, thereby cause the influence to the device in the inside, and then reduce the limitation of device, finally, when dismantling ventilative cap body 1, can increase frictional force through a plurality of lugs 2, make the dismantlement of device more convenient, thereby the convenience has been increased.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (6)

1. The utility model provides a waterproof type ventilation cap for gearbox, includes ventilation cap body (1), connecting pipe (3) and check valve (7), its characterized in that: the inside of ventilative cap body (1) has been seted up cavity (9), the outside of ventilative cap body (1) is provided with the internal thread, check valve (7) set up the inside at ventilative cap body (1), the inside of check valve (7) is provided with displacement mechanism, connecting pipe (3) threaded connection is in the outside of ventilative cap body (1), the inside of connecting pipe (3) is provided with the external screw thread, third vent (8) have been seted up to the bottom of check valve (7), second vent (5) have been seted up to the top equidistance of check valve (7).

2. A waterproof venting cap for a gearbox as claimed in claim 1, characterized in that: the displacement mechanism comprises a chute (10), the chute (10) is arranged in the check valve (7), a fixed plate (11) is fixedly connected to the chute (10), a guide rod (6) is slidably connected to the check valve (7), a displacement plate (13) is fixedly connected to the bottom of the guide rod (6), a spring (12) is fixedly connected between the displacement plate (13) and the fixed plate (11), and a fourth air hole (15) is formed in the fixed plate (11) at equal intervals.

3. A waterproof venting cap for a gearbox as claimed in claim 2, characterized in that: the displacement mechanism further comprises a plug (14), the plug (14) is fixedly connected to the bottom of the displacement plate (13), and the outer side of the plug (14) is in contact with the inner wall of the third vent hole (8).

4. A waterproof venting cap for a gearbox according to claim 3, characterized in that: the diameter of the plug (14) is equal to that of the third vent hole (8).

5. A waterproof venting cap for a gearbox as claimed in claim 1, characterized in that: first vent holes (4) are formed in the breathable cap body (1) at equal intervals.

6. A waterproof venting cap for a gearbox as claimed in claim 1, characterized in that: the outer side of the breathable cap body (1) is provided with lugs (2) at equal intervals.