CN215110422U - Transmission case breather and car transmission case - Google Patents
Transmission case breather and car transmission case Download PDFInfo
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- CN215110422U CN215110422U CN202022615794.6U CN202022615794U CN215110422U CN 215110422 U CN215110422 U CN 215110422U CN 202022615794 U CN202022615794 U CN 202022615794U CN 215110422 U CN215110422 U CN 215110422U
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Abstract
The utility model discloses a transmission case ventilation device and an automobile transmission case, wherein the transmission case ventilation device comprises a ventilation structure body, a splash protective cover, a first air charging and exhausting valve assembly and a second air charging and exhausting valve assembly; the ventilation structure body comprises a ventilation inner pipe, a ventilation outer pipe and a ventilation connecting piece, wherein the ventilation outer pipe is provided with a first ventilation hole, and the ventilation connecting piece is provided with a second ventilation hole; the splash protective cover is assembled on the periphery of the top of the ventilation outer pipe and is matched with the ventilation outer pipe to form an air guide channel, and the first vent hole is formed in the air guide channel; the first gas charging and discharging valve assembly is arranged between the ventilation inner pipe and the splash protective cover and is connected with the ventilation inner pipe and the splash protective cover; and the second air charging and discharging valve assembly is assembled on the air ventilation connecting piece and is arranged opposite to the second air ventilation hole. The technical scheme avoids the problem that the automobile transmission box is lost due to overlarge air pressure difference between the internal air pressure of the automobile transmission box and the atmospheric pressure, and improves the safety of the automobile transmission box during working or stopping working.
Description
Technical Field
The utility model relates to an automotive transmission technical field especially relates to a transmission case ventilation unit and automobile transmission case.
Background
When the automobile transmission case works, the temperature in the automobile transmission case can change, and after the air in the automobile transmission case expands with heat and contracts with cold, pressure difference is formed between the air and the air outside the automobile transmission case. In the prior art, a normally closed transmission case ventilating device is usually arranged on a transmission case of an automobile to balance the pressure difference between the inside and the outside of the transmission case of the automobile.
However, the conventional normally closed transmission case ventilation device is provided with an initial opening air pressure which is higher than the external atmospheric pressure, and when the internal air pressure of the automobile transmission case is lower than the initial opening air pressure in the normal working temperature reduction process of the automobile transmission case, the transmission case ventilation device is closed; when the temperature in the automobile transmission case further drops, the air pressure in the automobile transmission case is smaller than the external atmospheric pressure due to the rule of expansion with heat and contraction with cold, and the lower the temperature in the automobile transmission case is, the larger the negative pressure difference is, the normal work of the hydraulic system under the initial starting working condition in the automobile is influenced, the starting abnormal sound and even the function abnormality of the hydraulic system under the initial starting working condition are caused, and the sealing element in the automobile transmission case is worn out too early, so that the oil leakage problem is caused.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a transmission case ventilation unit and automobile transmission case to solve automobile transmission case cooling back, there is the problem of great negative pressure difference in the inside atmospheric pressure of automobile transmission case and atmospheric pressure.
The embodiment provides a transmission case ventilation device, which comprises a ventilation structure body, a splash protection cover, a first air charging and exhausting valve assembly and a second air charging and exhausting valve assembly, wherein the first air charging and exhausting valve assembly is arranged on the ventilation structure body;
the ventilation structure body comprises a ventilation inner pipe, a ventilation outer pipe and a ventilation connecting piece, wherein the ventilation outer pipe is sleeved on the periphery of the ventilation inner pipe and is connected with an automobile transmission box, the ventilation connecting piece extends to the ventilation outer pipe from the ventilation inner pipe along the radial direction, a first ventilation hole is formed in the ventilation outer pipe, and a second ventilation hole is formed in the ventilation connecting piece;
the splash protective cover is assembled on the periphery of the top of the ventilation outer pipe and is matched with the ventilation outer pipe to form an air guide channel, and the first vent hole is formed in the air guide channel;
the first gas charging and discharging valve assembly is arranged between the ventilation inner pipe and the splash protection cover and is connected with the ventilation inner pipe and the splash protection cover;
and the second air charging and discharging valve assembly is assembled on the ventilation connecting piece and is arranged opposite to the second ventilation hole.
Furthermore, at least two annular rib plates extend out of the periphery of the top of the ventilation outer pipe along the radial direction, the two adjacent annular rib plates are matched to form the air guide channel, and the first ventilation holes are formed in the annular rib plates along the axial direction.
Furthermore, a spring installation groove is formed in the inner wall of the splashing protection cover;
the first air charging and discharging valve assembly comprises an air charging and discharging spring, a first air charging and discharging valve body and an air charging and discharging valve cover;
the air charging and discharging valve cover is assembled on the periphery of the top of the ventilation inner pipe, and a ventilation channel is formed between the inner wall of the air charging and discharging valve cover and the outer wall of the ventilation inner pipe;
the charging and discharging gas spring is assembled between the spring mounting groove and the charging and discharging valve cover;
the first air charging and discharging valve body is assembled in an assembly space formed between the air charging and discharging valve cover and the ventilation inner pipe.
Furthermore, the splash protection cover comprises a protection cover body and a connecting buckle extending inwards from the tail end of the protection cover body along the radial direction, and the connecting buckle is clamped with the ventilation outer pipe.
Further, the inflation and exhaust valve cover comprises an air valve cover body, and a first assembling groove and a second assembling groove are formed in the air valve cover body; the first assembling groove is opposite to the spring installing groove, so that an assembling space for assembling the charging and discharging gas spring is formed; the second assembling groove is used for assembling the ventilation inner pipe and forms a ventilation channel with the outer wall of the ventilation inner pipe.
Further, the second air charging and exhausting valve assembly comprises a second air charging and exhausting valve body and an air charging and exhausting valve sealing gasket;
the second air charging and discharging valve body is assembled on the air vent connecting piece and is positioned above the second air vent;
and the air charging and discharging valve sealing gasket is assembled below the second ventilation hole and sleeved on the periphery of the ventilation inner pipe.
Further, the air charging and discharging valve sealing gasket comprises a sealing gasket body sleeved on the periphery of the air ventilating inner pipe and a sealing gasket outer edge extending outwards from the sealing gasket body along the radial direction, and the sealing gasket outer edge and the second air ventilating hole are arranged oppositely.
Furthermore, an annular convex rib extending towards the direction of the second vent hole is arranged on the edge of the outer edge of the sealing gasket, and the distance between the annular convex rib and the vent inner pipe is greater than that between the second vent hole and the vent inner pipe.
An automobile transmission case comprises a transmission case shell, a U-shaped cavity structure, an oil baffle plate and a sealing ring; the transmission case shell, the U-shaped cavity structure and the oil baffle plate form a closed air cavity; a transmission case mounting hole is formed in the transmission case shell, is positioned above the closed air cavity and is connected with the transmission case ventilating device; the sealing ring is arranged between the transmission case ventilating device and the transmission case mounting hole.
Furthermore, a sealing groove and an installation buckle are arranged on the ventilation outer pipe; the sealing ring is assembled in the sealing groove; the mounting buckle is clamped with a transmission case mounting hole of the automobile transmission case.
The embodiment of the utility model provides a transmission case breather and car transmission case, the structure body of ventilating includes the interior pipe of ventilating, cover establish the outer tube of ventilating that is connected with car transmission case in the interior pipe periphery of ventilating and from the interior pipe of ventilating along the radial direction extend to the outer tube of ventilating connecting piece, is equipped with first air vent on the outer tube of ventilating, is equipped with the second air vent on the connecting piece of ventilating; the splash protective cover is assembled on the periphery of the top of the ventilation outer pipe and is matched with the ventilation outer pipe to form an air guide channel, and the first vent hole is formed in the air guide channel; the first gas charging and discharging valve assembly is arranged between the ventilation inner pipe and the splash protective cover and is connected with the ventilation inner pipe and the splash protective cover; the second air charging and discharging valve assembly is assembled on the air ventilating connecting piece and is arranged opposite to the second air ventilating hole, when the automobile transmission box works or the automobile transmission box stops working and is cooled, the air pressure difference between the air pressure inside the automobile transmission box and the atmospheric pressure can be balanced, the phenomenon that the air pressure difference between the air pressure inside the automobile transmission box and the atmospheric pressure is too large, the loss of the automobile transmission box is avoided, and the safety of the automobile transmission box during working or stopping working is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a transmission case breather device according to an embodiment of the present invention.
In the figure: 10. a vent structure body; 11. a ventilation inner tube; 12. a venting outer tube; 121. an annular rib plate; 1211. a first vent hole; 13. a ventilation connection; 131. a second vent hole; 20. sputtering a protective cover; 21. a spring mounting groove; 30. a first inflation/exhaust valve assembly; 31. charging and discharging an air spring; 32. a first air charging and discharging valve body; 33. an inflation and exhaust valve cover; 40. a second air charging and discharging valve assembly; 41. a second air charging and discharging valve body; 42. a sealing gasket of the air charging and discharging valve; 51. an air guide channel; 52. a vent passage; 61. a transmission housing; 611. a transmission case mounting hole; 62. a U-shaped cavity body structure; 63. an oil baffle plate; 64. a seal ring; 65. The air cavity is closed.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present embodiment provides a transmission case ventilation device, as shown in fig. 1, including a ventilation structure body 10, a splash protection cover 20, a first air charging and exhausting valve assembly 30 and a second air charging and exhausting valve assembly 40; the ventilation structure body 10 comprises a ventilation inner pipe 11, a ventilation outer pipe 12 which is sleeved on the periphery of the ventilation inner pipe 11 and is connected with an automobile transmission box, and a ventilation connecting piece 13 which extends from the ventilation inner pipe 11 to the ventilation outer pipe 12 along the radial direction, wherein a first ventilation hole 1211 is arranged on the ventilation outer pipe 12, and a second ventilation hole 131 is arranged on the ventilation connecting piece 13; a splash protection cover 20 fitted to the top periphery of the breather outer tube 12 to form an air guide passage 51 in cooperation with the breather outer tube 12, the first vent 1211 being provided on the air guide passage 51; the first gas charging and discharging valve assembly 30 is arranged between the ventilation inner pipe 11 and the splash protection cover 20 and is connected with the ventilation inner pipe 11 and the splash protection cover 20; and a second air charging and discharging valve assembly 40 mounted on the air vent connector 13 and disposed opposite to the second air vent hole 131.
When the automobile transmission box works normally, the temperature or the rotating speed inside the automobile transmission box is continuously increased due to efficiency loss or the action of other heat sources, so that the air pressure inside the automobile transmission box is different from the external atmospheric pressure, when the air pressure inside the automobile transmission box is increased to the set opening pressure of the first air charging and exhausting valve assembly 30, the air pressure inside the automobile transmission box enables the second air charging and exhausting valve assembly 40 to close the second vent hole 131, the first air charging and exhausting valve assembly 30 is opened, so that the air inside the automobile transmission box enters the space between the inner vent pipe 11, the outer vent pipe 12 and the splash protective cover 20 through the inner vent pipe 11, as the splash protective cover 20 is assembled at the periphery of the top of the outer vent pipe 12 and is matched with the outer vent pipe 12 to form an air guide channel 51, at the moment, the air inside the automobile transmission box is exhausted through the first vent hole 1211 on the air guide channel 51, the air pressure difference between the air pressure inside the automobile transmission case and the external atmospheric pressure is balanced.
With the temperature or the rotating speed in the automobile transmission box falling, the air pressure in the automobile transmission box will be reduced, at this time, the first air charging and discharging valve assembly 30 is still in an open state, the transmission box ventilation device will suck air into the automobile transmission box through the first air charging and discharging valve assembly 30, the air enters the space between the ventilation inner tube 11, the ventilation outer tube 12 and the splash protection cover 20 through the first vent hole 1211 and enters the ventilation inner tube 11 through the first air charging and discharging valve assembly 30, and under the action of the first air charging and discharging valve assembly 30, the internal air pressure in the working state of the automobile transmission box will fluctuate in a small range.
When the automobile transmission box stops working, the inside of the automobile transmission box starts to be cooled, when the air pressure in the automobile transmission box is reduced to the set opening pressure of the first air charging and exhausting valve assembly 30, the first air charging and exhausting valve assembly 30 allows the air outside the automobile transmission box to enter the space between the inner ventilating pipe 11, the outer ventilating pipe 12 and the splash protective cover 20 through the first air vent 1211, the air outside the automobile transmission box enables the second air charging and exhausting valve assembly 40 to be opened and enters the automobile transmission box through the ventilating channel 52 between the inner ventilating pipe 11 and the outer ventilating pipe 12, and the air pressure difference between the air pressure in the automobile transmission box and the outside atmospheric pressure is balanced.
In this embodiment, the ventilation structure body 10 includes a ventilation inner tube 11, a ventilation outer tube 12 sleeved on the periphery of the ventilation inner tube 11 and connected to the transmission case of the vehicle, and a ventilation connector 13 extending from the ventilation inner tube 11 to the ventilation outer tube 12 along the radial direction, the ventilation outer tube 12 is provided with a first ventilation aperture 1211, and the ventilation connector 13 is provided with a second ventilation aperture 131; the splash protection cover 20 is assembled on the top periphery of the ventilating outer tube 12 and is matched with the ventilating outer tube 12 to form an air guide channel 51, and a first ventilating hole 1211 is arranged on the air guide channel 51; the first gas charging and discharging valve assembly 30 is arranged between the ventilation inner pipe 11 and the splash protection cover 20 and is connected with the ventilation inner pipe 11 and the splash protection cover 20; the second air charging and discharging valve assembly 40 is assembled on the air ventilation connecting piece 13 and is arranged opposite to the second air ventilation hole 131, when the automobile transmission box works or the automobile transmission box stops working and is cooled, the air pressure difference between the air pressure inside the automobile transmission box and the atmospheric pressure can be balanced, the phenomenon that the air pressure difference between the air pressure inside the automobile transmission box and the atmospheric pressure is too large, the loss of the automobile transmission box is caused, and the safety of the automobile transmission box in working or stopping working is improved.
In an embodiment, as shown in fig. 1, at least two annular rib plates 121 extend from the top periphery of the aeration outer tube 12 in the radial direction, the air guide channel 51 is formed by matching two adjacent annular rib plates 121, and the annular rib plates 121 are provided with first aeration holes 1211 in the axial direction.
As an example, at least two annular rib plates 121 extend from the top periphery of the outer ventilation pipe 12 in the radial direction, an even number of annular rib plates 121 are arranged on the top periphery of the outer ventilation pipe 12, the air guide channels 51 formed by matching two adjacent annular rib plates 121, and the annular rib plates 121 are provided with first ventilation holes 1211 in the axial direction. Preferably, the first ventilation holes 1211 on adjacent annular rib plates 121 are arranged in a staggered manner. For example, four annular rib plates 121 are arranged on the top periphery of the ventilation outer tube 12, and first ventilation holes 1211 which are staggered by 180 degrees are arranged on adjacent annular rib plates 121.
In this embodiment, at least two annular rib plates 121 extend from the periphery of the top of the ventilation outer tube 12 in the radial direction, the air guide channels 51 formed by matching the two adjacent annular rib plates 121 are provided with first vent holes 1211 along the axial direction on the annular rib plates 121, the first vent holes 1211 on the adjacent annular rib plates 121 are arranged in a staggered manner, and the first vent holes 1211 on the air guide channels 51 can effectively prevent impurities and water vapor in the external environment from entering the automobile transmission case while balancing the air pressure difference between the air pressure inside the automobile transmission case and the atmospheric pressure.
In one embodiment, as shown in fig. 1, a spring installation groove 21 is formed on an inner wall of the sputtering protection cover 20; the first inflation and exhaust valve assembly 30 comprises an inflation and exhaust gas spring 31, a first inflation and exhaust valve body 32 and an inflation and exhaust valve cover 33; the inflation and exhaust valve cover 33 is assembled at the top periphery of the ventilation inner pipe 11, and a ventilation channel 52 is formed between the inner wall of the inflation and exhaust valve cover 33 and the outer wall of the ventilation inner pipe 11; a charging and discharging gas spring 31 assembled between the spring mounting groove 21 and the charging and discharging valve cover 33; the first inflation/exhaust valve body 32 is fitted in a fitting space formed between the inflation/exhaust valve cover 33 and the ventilation inner pipe 11.
As an example, when the automobile transmission case is operating normally, the temperature or the rotation speed inside the automobile transmission case is continuously increased due to efficiency loss or other heat source, so that the air pressure inside the automobile transmission case is higher than the external atmospheric pressure, the air pressure inside the automobile transmission case compresses the charging and discharging gas spring 31 through the charging and discharging valve cover 33, so that the first charging and discharging valve body 32 is opened, so that the gas in the automobile transmission case flows through the ventilation inner tube 11, enters the space between the ventilation inner tube 11, the ventilation outer tube 12 and the splash protection cover 20 through the ventilation channel 52, and finally, the gas inside the automobile transmission case is discharged through the first ventilation hole 1211, so as to balance the air pressure difference between the air pressure inside the automobile transmission case and the external atmospheric pressure. It can be understood that, as the temperature or the rotation speed inside the automobile transmission case decreases, the air pressure inside the automobile transmission case decreases, at this time, the charging and discharging air spring 31 is still in the compressed state, the first charging and discharging air valve body 32 is still in the open state, the transmission case ventilating device also sucks air from the ventilating passage 52 into the automobile transmission case, the air enters the space between the ventilating inner tube 11, the ventilating outer tube 12 and the splash protection cover 20 through the first ventilating hole 1211 and enters the ventilating inner tube 11 through the ventilating passage 52, and the internal air pressure fluctuates in a small range in the operating state of the automobile transmission case.
As another example, when the operation of the vehicle transmission case is stopped, the interior of the vehicle transmission case begins to cool, when the air pressure inside the vehicle transmission case is less than the atmospheric pressure, the charging and discharging air spring 31 tightly compresses the first charging and discharging air valve body 32 on the inner vent pipe 11 through the charging and discharging air valve cover 33, the first charging and discharging air valve body 32 is closed, the air outside the transmission case enters the space between the inner vent pipe 11, the outer vent pipe 12 and the splash protection cover 20 through the first vent hole 1211, the air outside the vehicle transmission case opens the second charging and discharging air valve assembly 40, and enters the vehicle transmission case through the gap between the inner vent pipe 11 and the outer vent pipe 12, and the air pressure difference between the air pressure inside the vehicle transmission case and the atmospheric pressure outside the vehicle transmission case is balanced.
In the present embodiment, an exhaust valve cover is mounted on the top periphery of the ventilation inner tube 11, and a ventilation channel 52 is formed between the inner wall of the inflation/exhaust valve cover 33 and the outer wall of the ventilation inner tube 11; the charging and discharging gas spring 31 is assembled between the spring mounting groove 21 and the charging and discharging valve cover 33; the first air charging and discharging valve body 32 is assembled in an assembly space formed between the air charging and discharging valve cover 33 and the ventilation inner pipe 11, and when the automobile transmission box works or the automobile transmission box stops working and is cooled, the air pressure difference between the air pressure inside the automobile transmission box and the atmospheric pressure can be balanced, the phenomenon that the air pressure difference between the air pressure inside the automobile transmission box and the atmospheric pressure is too large, loss of the automobile transmission box is caused, and the safety of the automobile transmission box during working or stopping working is improved.
In one embodiment, as shown in fig. 1, the sputtering protection cover 20 includes a protection cover body, and a connection buckle extending inward from the end of the protection cover body in the radial direction, and the connection buckle is buckled with the outer venting tube 12.
In this embodiment, the splash protection cover 20 includes a protection cover body, and a connection buckle extending inward from the end of the protection cover body along the radial direction, and the connection buckle is connected with the ventilation outer tube 12 in a clamping manner, so that the splash protection cover 20 can be conveniently mounted and dismounted, and meanwhile, impurities and water vapor in the external environment can be prevented from entering the automobile transmission case.
In one embodiment, as shown in fig. 1, the inflation/deflation valve cap 33 comprises a valve cap body, which is provided with a first assembly groove and a second assembly groove; the first assembly groove is arranged opposite to the spring installation groove 21 to form an assembly space for assembling the charging and discharging gas spring 31; and a second fitting groove for fitting the vent inner tube 11 and forming a vent passage 52 with an outer wall of the vent inner tube 11.
In this embodiment, when the vehicle transmission box is working normally, the temperature or the rotation speed inside the vehicle transmission box is increased continuously due to efficiency loss or other heat source, so that the air pressure inside the vehicle transmission box is greater than the external atmospheric pressure, and the air pressure inside the vehicle transmission box compresses the charging and discharging gas spring 31 through the charging and discharging valve cover 33, so that the first charging and discharging valve body 32 in the assembly space is opened. When the automobile transmission box stops working, the interior of the automobile transmission box starts to be cooled, and when the air pressure in the automobile transmission box is smaller than the atmospheric pressure, the first air charging and discharging valve body 32 is tightly compressed on the ventilation inner pipe 11 through the air charging and discharging spring 31 through the air charging and discharging valve cover 33, so that the first air charging and discharging valve body 32 in the assembly space is closed, the air pressure in the automobile transmission box is maintained within a certain range, and the air pressure difference between the air pressure in the automobile transmission box and the atmospheric pressure is reduced.
In one embodiment, as shown in fig. 1, the second charge and exhaust valve assembly 40 includes a second charge and exhaust valve body 41 and a charge and exhaust valve gasket 42; a second air charging and discharging valve body 41 assembled on the air vent connector 13 and positioned above the second air vent hole 131; and the air charging and discharging valve sealing gasket 42 is assembled below the second ventilation hole 131 and sleeved on the periphery of the ventilation inner pipe 11.
Specifically, the second air charging and discharging valve body 41 is in transition fit with the air vent connector 13, so that air outside the automobile transmission box can flow through the second air charging and discharging valve body 41 and the second air vent 131 and enter the automobile transmission box, and the air pressure difference between the air pressure inside the automobile transmission box and the atmospheric pressure is balanced.
As an example, when the operation of the automobile transmission case is stopped, the inside of the automobile transmission case starts to cool, when the air pressure inside the automobile transmission case is less than the atmospheric pressure, the charging and discharging air spring 31 tightly compresses the first charging and discharging air valve body 32 on the inner vent pipe 11 through the charging and discharging air valve cover 33, the first charging and discharging air valve body 32 is closed, the air outside the automobile transmission case enters the space between the inner vent pipe 11, the outer vent pipe 12 and the splash protection cover 20 through the first vent 1211, the air outside the automobile transmission case deforms the charging and discharging air valve gasket 42, the air outside the automobile transmission case enters the automobile transmission case through the vent passage 52 between the inner vent pipe 11 and the outer vent pipe 12, and the air pressure difference between the air pressure inside the automobile transmission case and the atmospheric pressure outside the automobile transmission case is balanced.
As another example, when the automobile transmission case is normally operated, the temperature or the rotation speed inside the automobile transmission case is continuously increased due to efficiency loss or other heat sources, so that the air pressure inside the automobile transmission case is higher than the external atmospheric pressure, when the air pressure inside the automobile transmission case is increased to the set opening pressure of the first air charging and exhausting valve assembly 30, the air pressure inside the automobile transmission case causes the air charging and exhausting valve gasket 42 to block the second air vent 131, so that the air in the automobile transmission case flows through the air vent inner tube 11, enters the space between the air vent inner tube 11, the air vent outer tube 12 and the splash protection cover 20 through the air vent passage 52, and finally, the air inside the automobile transmission case is exhausted through the first air vent 1211.
In the present embodiment, the second air charging and discharging valve body 41 is assembled on the air vent connector 13 above the second air vent hole 131; the charging and discharging valve sealing gasket 42 is assembled below the second vent hole 131 and connected with the vent inner pipe 11, and the second charging and discharging valve assembly 40 controls the opening and closing of the second vent hole 131 through the second charging and discharging valve body 41 and the charging and discharging valve sealing gasket 42 so as to further balance the air pressure difference between the air pressure inside the automobile transmission case and the external atmospheric pressure.
In one embodiment, as shown in fig. 1, the air charging and discharging valve gasket 42 includes a gasket body disposed around the inner vent tube 11, and a gasket outer edge extending radially outward from the gasket body, and the gasket outer edge is disposed opposite to the second vent hole 131.
The cross section of the air charging and discharging valve sealing gasket 42 is in a T shape.
In this embodiment, the air charging and discharging valve gasket 42 includes a gasket body sleeved on the periphery of the inner ventilation pipe 11, and a gasket outer edge extending radially outward from the gasket body, and the gasket outer edge is disposed opposite to the second ventilation hole 131 to prevent the lubricating oil in the automobile transmission box from being discharged through the second ventilation hole 131 by the air in the automobile transmission box when the air pressure inside the automobile transmission box is greater than the external atmospheric pressure.
In an embodiment, as shown in fig. 1, an annular rib extending toward the second vent hole 131 is disposed on an edge of the outer edge of the gasket, and a distance between the annular rib and the vent inner tube 11 is greater than a distance between the second vent hole 131 and the vent inner tube 11.
In this embodiment, an annular rib extending toward the second vent hole 131 is disposed on the edge of the outer edge of the gasket, and the distance between the annular rib and the vent inner tube 11 is greater than the distance between the second vent hole 131 and the vent inner tube 11, so as to prevent the lubricating oil in the vehicle transmission case from being discharged through the second vent hole 131 by the air inside the vehicle transmission case when the air pressure inside the vehicle transmission case is greater than the external atmospheric pressure.
The embodiment provides an automobile transmission case, as shown in fig. 1, comprising a transmission case body 61, a U-shaped cavity body structure 62, an oil baffle 63 and a sealing ring 64; the transmission case shell 61, the U-shaped cavity structure 62 and the oil baffle plate 63 form a closed air cavity 65; the transmission case shell 61 is provided with a transmission case mounting hole 611, and the transmission case mounting hole 611 is positioned above the closed air cavity 65 and is connected with the transmission case ventilating device in the embodiment; the seal 64 is disposed between the transmission case breather and the transmission case mounting hole 611.
In this embodiment, the transmission case 61, the U-shaped cavity structure 62 and the oil baffle 63 form a closed air cavity 65, so that the lubricating oil splashed by the gear of the automobile transmission case is prevented from directly hitting the transmission case ventilating device, and the oil spraying phenomenon is prevented. A transmission case mounting hole 611 is formed in the transmission case shell 61, and the transmission case mounting hole 611 is located above the closed air cavity 65 and connected with a transmission case ventilating device; a seal 64 is provided between the transmission case breather and the transmission case mounting hole 611 to enable the transmission case breather to balance a pressure difference between the air pressure inside the automobile transmission case and the atmospheric pressure outside.
In one embodiment, as shown in fig. 1, the outer ventilation tube 12 is provided with a sealing groove and a mounting buckle; the seal ring 64 is fitted in the seal groove; the mounting buckle is clamped with a transmission case mounting hole 611 of the automobile transmission case.
The seal ring 64 is disposed between the seal groove and the transmission case mounting hole 611, and is connected to the seal groove and the transmission case mounting hole 611. The transmission case mounting hole 611 is a mounting hole on an automobile transmission case. The seal groove is provided at the lower portion of the venting outer tube 12 and the mounting clip is provided at the end distal from the splash guard 20.
In this embodiment, the bottom of the ventilation outer tube 12 is provided with a sealing groove and a mounting buckle, the sealing groove is connected with a sealing ring 64 of the automobile transmission case, and is used for preventing lubricating oil inside the automobile transmission case from escaping from the transmission case mounting hole 611 or preventing impurities and water vapor in the external environment from entering the automobile transmission case. The mounting buckle is clamped with a transmission case mounting hole 611 of the automobile transmission case, so that the transmission case ventilating device is convenient to mount, dismount and maintain.
The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A transmission case ventilation device is characterized by comprising a ventilation structure body, a splash protective cover, a first air charging and discharging valve assembly and a second air charging and discharging valve assembly;
the ventilation structure body comprises a ventilation inner pipe, a ventilation outer pipe and a ventilation connecting piece, wherein the ventilation outer pipe is sleeved on the periphery of the ventilation inner pipe and is connected with an automobile transmission box, the ventilation connecting piece extends to the ventilation outer pipe from the ventilation inner pipe along the radial direction, a first ventilation hole is formed in the ventilation outer pipe, and a second ventilation hole is formed in the ventilation connecting piece;
the splash protective cover is assembled on the periphery of the top of the ventilation outer pipe and is matched with the ventilation outer pipe to form an air guide channel, and the first vent hole is formed in the air guide channel;
the first gas charging and discharging valve assembly is arranged between the ventilation inner pipe and the splash protection cover and is connected with the ventilation inner pipe and the splash protection cover;
and the second air charging and discharging valve assembly is assembled on the ventilation connecting piece and is arranged opposite to the second ventilation hole.
2. The transmission case ventilating device according to claim 1, wherein at least two annular rib plates extend from the periphery of the top of the ventilating outer pipe in the radial direction, the air guide channel is formed by matching two adjacent annular rib plates, and the first ventilating holes are formed in the annular rib plates in the axial direction.
3. The transmission case breather apparatus of claim 1, wherein a spring mounting groove is provided on an inner wall of the splash protection cover;
the first air charging and discharging valve assembly comprises an air charging and discharging spring, a first air charging and discharging valve body and an air charging and discharging valve cover;
the air charging and discharging valve cover is assembled on the periphery of the top of the ventilation inner pipe, and a ventilation channel is formed between the inner wall of the air charging and discharging valve cover and the outer wall of the ventilation inner pipe;
the charging and discharging gas spring is assembled between the spring mounting groove and the charging and discharging valve cover;
the first air charging and discharging valve body is assembled in an assembly space formed between the air charging and discharging valve cover and the ventilation inner pipe.
4. The transmission case breather apparatus of claim 1, wherein the splash guard includes a guard body, and a connector clip extending radially inward from an end of the guard body, the connector clip being snap-fit to the breather outer tube.
5. The transmission case breather of claim 3, wherein the charge and exhaust valve cover comprises a valve cover body, the valve cover body having a first assembly groove and a second assembly groove; the first assembling groove is opposite to the spring installing groove, so that an assembling space for assembling the charging and discharging gas spring is formed; the second assembling groove is used for assembling the ventilation inner pipe and forms a ventilation channel with the outer wall of the ventilation inner pipe.
6. The transmission case breather of claim 1, wherein the second charge and exhaust valve assembly comprises a second charge and exhaust valve body and a charge and exhaust valve gasket;
the second air charging and discharging valve body is assembled on the air vent connecting piece and is positioned above the second air vent;
and the air charging and discharging valve sealing gasket is assembled below the second ventilation hole and sleeved on the periphery of the ventilation inner pipe.
7. The transmission case breather of claim 6, wherein the charge and exhaust valve gasket comprises a gasket body disposed about the periphery of the inner vent tube, and a gasket outer edge extending radially outward from the gasket body, the gasket outer edge being disposed opposite the second vent hole.
8. The transmission case breather apparatus according to claim 7, wherein an annular rib extending in a direction of the second vent hole is provided on an edge of the outer edge of the gasket, and a distance between the annular rib and the vent inner tube is greater than a distance between the second vent hole and the vent inner tube.
9. An automobile transmission case is characterized by comprising a transmission case shell, a U-shaped cavity structure, an oil baffle plate and a sealing ring; the transmission case shell, the U-shaped cavity structure and the oil baffle plate form a closed air cavity; a transmission case mounting hole is formed in the transmission case shell, is positioned above the closed air cavity and is connected with the transmission case ventilating device of any one of claims 1 to 8; the sealing ring is arranged between the transmission case ventilating device and the transmission case mounting hole.
10. The vehicle transmission case of claim 9, wherein the vent outer tube is provided with a sealing groove and a mounting buckle; the sealing ring is assembled in the sealing groove; the mounting buckle is clamped with a transmission case mounting hole of the automobile transmission case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022615794.6U CN215110422U (en) | 2020-11-12 | 2020-11-12 | Transmission case breather and car transmission case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022615794.6U CN215110422U (en) | 2020-11-12 | 2020-11-12 | Transmission case breather and car transmission case |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215110422U true CN215110422U (en) | 2021-12-10 |
Family
ID=79262698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022615794.6U Active CN215110422U (en) | 2020-11-12 | 2020-11-12 | Transmission case breather and car transmission case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215110422U (en) |
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2020
- 2020-11-12 CN CN202022615794.6U patent/CN215110422U/en active Active
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