KR101571243B1

KR101571243B1 - Air circulation type air breather for oil tank of vehicle

Info

Publication number: KR101571243B1
Application number: KR1020140062545A
Authority: KR
Inventors: 이상훈
Original assignee: 현대위아 주식회사
Priority date: 2014-05-23
Filing date: 2014-05-23
Publication date: 2015-11-23

Abstract

An embodiment of the present invention relates to an air circulation type air breather for an oil tank of a vehicle. The present invention aims to provide an air circulation type air breather for an oil tank of a vehicle, which can take in and discharge internal and external air to control the internal pressure of the oil tank and can block an inflow of moisture. To achieve this purpose, the air circulation type air breather of the present invention comprises: a body combined with the oil tank for a vehicle with a hollow part formed vertically; a spool combined with the hollow part to be able to be elevated and to seal the hollow part of the body, which has one or more penetrating holes; a packing unit combined with the penetrating hole of the spool to be opened or closed according to the internal pressure of the oil tank; a cap combined with the body as the top end of the spool to prevent the spool from breaking away; a spring which is coupled between the spool and the cap to pressurize the spool; multiple partitions formed in between the body and the cap, where air is taken in and discharged by the elevation of the spool; and a blocking plate combined with the inside of the end of the cap and distanced from the body by a certain interval. The body has a hole in an area corresponding to the external side of the spool. The hole is combined with a ball spring assembly.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an air breather for an automobile oil tank,

An embodiment of the present invention relates to an air circulation type air breather of an oil tank for a vehicle.

Generally, an air breather mounted on an oil tank for a transmission of a vehicle raises the plate upward when the internal pressure of the transmission rises, thereby discharging the internal air through a gap between the body and the plate. Further, when the internal air is discharged and the pressure is held constant, the plate is lowered by the force of the spring and then blocked again.

Thus, in the conventional air breather, there is only an effect of discharging the internal air when the internal pressure of the transmission rises.

In addition, the conventional air breather has a problem of leakage due to the occurrence of deviation of the air breather during running of the vehicle due to the press-fitting of the hole in assembling the housing of the transmission.

In addition, the conventional air breather has a problem in that the pressure rises and the internal oil leaks when the air is discharged.

In addition, the conventional air breather only discharges the internal air, and there is a problem that the external air can not be sucked.

Registered Utility Model Notice 20-0414693 (April 24, 2006)

An embodiment of the present invention provides an air circulating air breather for an automotive oil tank capable of intake and exhaust of internal and external air for adjusting an internal pressure of an oil tank.

An embodiment of the present invention provides an air circulating air breather which can be assembled in a housing of an oil tank in a bolt manner and in which circulation passages of air and oil are separated.

An embodiment of the present invention provides an air circulation type air breather in which suction of moisture can be blocked at a portion where air is sucked and discharged.

The air circulating type air breather for a vehicle oil tank according to an embodiment of the present invention includes: a body coupled to an oil tank for a vehicle and having a hollow in a vertical direction; A spool having at least one through hole coupled to the hollow so as to close the hollow of the body; A packing portion coupled to the through hole of the spool and being opened or closed according to an internal pressure of the oil tank; A cap coupled to the body as an upper end of the spool to prevent disengagement of the spool; A spring coupled between the spool and the cap to press the spool; And a plurality of partitions formed between the body and the cap through which the air is sucked and discharged by lifting and lowering the spool, wherein a hole is formed in the body in a region corresponding to the outside of the spool, Assembly.

The partition wall portion may include: a first concave-convex portion formed in the cap; And a second concavo-convex portion formed on the body and engaged with the first concavo-convex portion at a predetermined distance.

In addition, the end of the body may have an inclined portion that is inclined downward to drain water, and an end portion of the cap may have a bent portion bent downward along the end portion of the body.

Also, the body may be coupled to the oil tank in a bolt manner.

The air filter may further be coupled to the hole corresponding to the outside of the ball spring assembly.

The through hole of the spool is formed in a vertical direction, and the packing portion is coupled with the first through hole. A second through hole communicating with the first through hole as an upper portion of the packing portion and formed in a horizontal direction; And a third through hole communicating with the first through hole as a lower portion of the packing portion and formed in a horizontal direction.

Also, the packing portion may include a rubber packing having at least one incision portion; And an O-ring in close contact with the lower surface of the rubber packing.

Another aspect of the present invention is to provide an air circulation type air breather for a vehicle oil tank, comprising: a body coupled to an oil tank for a vehicle and having a hollow in a vertical direction; A spool having at least one through hole coupled to the hollow so as to close the hollow of the body; A packing portion coupled to the through hole of the spool and being opened or closed according to an internal pressure of the oil tank; A cap coupled to the body as an upper end of the spool to prevent disengagement of the spool; A spring coupled between the spool and the cap to press the spool; And a blocking plate coupled to an inside of an end of the cap and spaced apart from the body by a predetermined distance, wherein a hole is formed in an area of the body corresponding to an outer side of the spool, and a ball spring assembly is coupled to the hole.

In addition, the end of the body may have a downwardly inclined portion, and the end of the cap may have a bent portion bent downward along the end of the body.

The blocking plate may be coupled to the body at an end of the bent portion.

Also, the body may be coupled to the oil tank in a bolt manner.

According to another aspect of the present invention, there is provided an air-circulating air breather for a vehicle oil tank, comprising: a body coupled to an oil tank for a vehicle and having a hollow in a vertical direction; A spool having at least one through hole coupled to the hollow so as to close the hollow of the body; A packing portion coupled to the through hole of the spool and being opened or closed according to an internal pressure of the oil tank; A cap coupled to the body as an upper end of the spool to prevent disengagement of the spool; A spring coupled between the spool and the cap to press the spool; A plurality of partition walls formed between the body and the cap through which the air is sucked and discharged by lifting and lowering the spool; And a blocking plate coupled to an inside of an end of the cap and spaced apart from the body by a predetermined distance, wherein a hole is formed in an area of the body corresponding to an outer side of the spool, and a ball spring assembly is coupled to the hole.

The blocking plate may be coupled to the body at an end of the bent portion.

Also, the body may be coupled to the oil tank in a bolt manner.

An embodiment of the present invention provides an air circulating air breather in which moisture can be prevented from flowing into a portion where air is sucked and discharged.

1 is a sectional view showing an air circulating air breather of an oil tank for a vehicle according to an embodiment of the present invention.
FIG. 2A is a perspective view showing a packing part in an air circulating type air breather of an oil tank for a vehicle according to an embodiment of the present invention, and FIGS. 2B and 2C are sectional views showing the closing and opening states of the packing part.
3A to 3D are cross-sectional views illustrating an operating state of an air circulating air breather of an oil tank for a vehicle according to an embodiment of the present invention.
4A to 4C are cross-sectional views illustrating the prevention and release of moisture inflow according to the operation state of the air circulating air breather of the oil tank for a vehicle according to the embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified in various other forms, The present invention is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more faithful and complete, and will fully convey the scope of the invention to those skilled in the art.

In the following drawings, thickness and size of each layer are exaggerated for convenience and clarity of description, and the same reference numerals denote the same elements in the drawings. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a,""an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

1 is a sectional view showing an air circulating air breather of an oil tank for a vehicle according to an embodiment of the present invention.

1, an air-circulating air blower 100 of an oil tank for a vehicle according to the present invention includes a body 110, a spool 120, a packing 130, a cap 140, a spring 150, A ball spring assembly 160, a plurality of partitions 170, and a blocking plate 180.

The body 110 is coupled to the vehicle oil tank 101 in a bolt manner and a hollow 111 is formed in a substantially vertical direction with respect to the oil tank 101. A bolt 112 is formed at the lower end of the body 110 and a thread 102 is formed in the oil tank 101 so that the oil mist 101 is separated from the oil tank 101, To prevent the occurrence of phenomena such as leakage. The side end portion of the body 110 has an inclined portion 115 that is inclined downward. The role of the slope portion 115 will be described later.

The spool 120 is configured to block the hollow 111 of the body 110 and to move up and down along the hollow 111 by the internal pressure of the oil tank 101 and / Lt; / RTI > A through hole is formed in the spool 120. The through hole includes a first through hole 121, a second through hole 122, and a third through hole 123.

The first through-hole 121 is formed in a direction substantially perpendicular to the fuel tank 101, and the packing portion 130 is coupled to the first through-hole 121. The longitudinal direction of the first through hole 121 is substantially parallel to the longitudinal direction of the hollow 111 described above.

The second through hole 122 is an upper portion of the packing portion 130 and communicates with the first through hole 121 and is formed in a substantially horizontal direction with respect to the fuel tank 101. In other words, the longitudinal direction of the second through-hole 122 is substantially horizontal with respect to the longitudinal direction of the first through-hole 121. The first through hole 121 serves as a passage for allowing the internal air of the fuel tank 101 to compress the ball spring assembly 160 or for discharging the internal air of the fuel tank 101 to the outside . This is explained in detail below.

The third through hole 123 is a lower portion of the packing 130 and communicates with the first through hole 121 and is formed in a substantially horizontal direction with respect to the fuel tank 101. In other words, the longitudinal direction of the third through-hole 123 is substantially horizontal with respect to the longitudinal direction of the first through-hole 121. The third through hole 123 serves to circulate the oil in the oil tank 101 without leaking the inner oil of the fuel tank 101 to the outside. This is described in detail below.

The packing 130 is coupled to the center of the first through hole 121 formed in the spool 120 as described above. When the internal pressure of the oil tank 101 is greater than the external pressure, the internal pressure of the oil tank 101 is discharged to the outside, And is closed to block the first through hole 121 when the external pressure is greater than the internal pressure. This will be described below.

The cap 140 is coupled to the body 110 as the upper end of the spool 120 to prevent disengagement of the spool 120. The cap 140 is formed in a substantially "∩" shape and is fixed to the upper end of the body 110. The edge portion of the cap 140 extends in a direction parallel to the body 110 and the end portion 141 forms a bent portion bent downward along the inclined portion 115 of the body 110. Here, the edge portion of the cap 140 is spaced apart from the body 110, thereby allowing air to be sucked and discharged to the inside and outside of the air breather 110. A spring 150 is coupled between the spool 120 and the cap 140 to urge the spool 120 downward. The spring 150 basically pushes the spool 120 downward when the internal pressure of the oil tank 101 is equal to or smaller than the external pressure.

Meanwhile, the ball spring assembly 160 is coupled to the inclined hole 113 formed in the body 110. Here, the hole 113 may be formed to be inclined to a region corresponding to the outside of the spool 120 for sucking outside air. The ball spring assembly 160 is composed of a ball 161 and a spring 162 and is movable up and down along the hole 113. However, the diameter of the end of the hole 113 is relatively small, so that the ball 161 can not be released to the outside of the hole 113. In addition, an air filter 163 is further coupled to the hole 113, through which the outside air is filtered and drawn into the oil tank 101.

The plurality of partitions 170 are formed between the cap 110 and the body 110 through which the air is sucked and discharged by the lifting and lowering of the spool 120. For example, as shown in FIG. 4A, the barrier ribs 170 may include first irregular portions 171 and second irregular portions 173. The first concave and convex portions 171 are formed on the bottom surface of the end portion 141 of the cap 140 side by side in the direction toward the inside of the cap 140. The second concave-convex portion 173 is formed in a shape complementary to the first concave-convex portion 171 at a position corresponding to the first concave-convex portion 171 of the upper edge of the body 110, As shown in FIG. The first and second concave and convex portions 171 and 173 are spaced apart from each other so that air can be sucked and discharged between the inside and the outside of the air breather 100 and the air flow path is extended by the concave- ), It is possible to more effectively block the influx of moisture into the interior.

On the other hand, an inclined portion 115 is formed at an end portion of the body 110 in order to release moisture blocked by the partition 170. Here, the inclined portion 115 is formed on the inlet side of the partition wall 170 so that moisture that can not be introduced by the partition wall 170 flows downward.

The blocking plate 180 is coupled to the body 110 at the end 141 of the cap 140 and is spaced apart from the body 110 at regular intervals. The blocking plate 180 blocks the inflow of moisture and foreign substances from the inlet of the partition wall 170 when the air is sucked into the air breather 100 and the moisture that is located below the slope part 115 and blocked by the partition wall 170 And guiding the foreign matter to be discharged to the outside well. The blocking plate 180 may be formed in an " L " shape, but may be modified in various forms.

FIG. 2A is a perspective view showing a packing part in an air circulating type air breather of an oil tank for a vehicle according to an embodiment of the present invention, and FIGS. 2B and 2C are sectional views showing the closing and opening states of the packing part.

2A, the packing unit 130 includes a rubber packing 131 and an O-ring 132 coupled to a lower end of the rubber packing 131. As shown in FIG. Here, the rubber packing 131 is formed with a cutout 131a in a substantially + (+) shape. However, the shape of the incision portion 131a is not limited to this form, and the incision portion 131a may be cut in various forms.

As shown in FIGS. 2B and 2C, when the left and right pressures are constant around the rubber packing 131, the rubber packing 131 remains closed, but the rubber packing 131 is centered When the left and right pressures are different from each other, the rubber packing 131 remains open.

3A to 3D are cross-sectional views illustrating an operating state of an air circulating air breather of an oil tank for a vehicle according to an embodiment of the present invention. 4A to 4C are cross-sectional views specifically illustrating the prevention and inflow of water according to the operation state of the air circulation type air breather of the oil tank for a vehicle according to the embodiment of the present invention.

The air breather 100 shown in Figs. 3A and 4A is a sectional view showing a state in which the internal pressure of the oil tank 101 is equal to the external pressure (internal pressure of the oil tank = external pressure). Normally, before the operation of the hydraulic system, the internal pressure of the oil tank 101 becomes equal to the external pressure, so that the air breather 100 does not operate. That is, the spool 120 completely closes the hollow 111 of the body 110 by the pressure of the spring 150. Also, the packing part 130 coupled to the first through hole 121 of the spool 120 does not operate, so that the first through hole 121 remains closed. In addition, since the ball spring assembly 160 is also not operated, external air can be sucked to some extent through the holes 113 and the air filter 163 formed in the body 110. However, as described above, since the packing portion 130 closes the first through-hole 121, the outside air is not sucked into the oil tank 101.

The air breather 100 shown in FIG. 3B is a sectional view showing an initial state in which the internal pressure of the oil tank 101 is greater than the external pressure (internal pressure of the oil tank> external pressure (initial pressure rise)). The internal pressure of the oil tank 101 can be gradually increased by the operation of the hydraulic system. Then, by the rise of the internal pressure, the internal air starts to be discharged through the packing part 130 from the instant when the internal pressure exceeds the external pressure. The first through hole 121 of the spool 120 is opened while the rubber packing 131 constituting the packing 130 is opened so that the internal air of the oil tank 101 flows through the first through hole 121 of the spool 120, The ball spring assembly 160 coupled to the hole 113 of the body 110 is urged in the substantially upward direction through the first through hole 121 and the second through hole 122 (see arrows in the figure). Then, the ball 161 constituting the ball spring assembly 160 closes the end of the hole 113, so that intake of the outside air through the hole 113 is completely cut off.

The air breather 100 shown in FIG. 3C is a sectional view showing a state after the middle half in which the internal pressure of the oil tank 101 is relatively larger than the external pressure. (Internal pressure of the oil tank >> External pressure After the ball spring assembly 160 is raised to completely cut off the external air suction hole 113 as described above, the spool 120 is continuously raised by the internal pressure, And is discharged to the outside through the passage of approximately (1). That is, the internal air is exhausted to the outside through the first through hole 121, the second through hole 122 formed in the spool 120, and the space between the spool 120 and the cap 140.

At this time, the packing part 130 functions to prevent the excessive discharge of the oil while appropriately adjusting the internal and external pressures. That is, since the internal pressure of the oil tank 101 becomes almost similar to the external pressure after the internal air, which is lighter than the oil, is exhausted first through the passage (1), the packing 130 is almost closed, The oil is circulated in the oil tank 101 through the oil passage (2) rather than the oil passage (1). That is, the oil in the oil tank 101 circulates through the first through-hole 121 and the second through-hole 122 of the spool 120, thereby preventing leakage of oil as in the prior art.

On the other hand, when the internal pressure of the oil tank 101 and the external pressure are equal to each other, the state shown in FIG. 3A is maintained. Therefore, a description thereof will be omitted.

The air breather 100 shown in FIG. 3D is a sectional view showing a state in which the internal pressure of the oil tank 101 is relatively smaller than the external pressure (internal pressure of the oil tank <external pressure). When the internal pressure of the oil tank 101 is smaller than the external pressure, the external air is sucked through the suction hole 113 formed in the body 110, and the foreign matter is filtered by the air filter 163 (see arrows) . Of course, since there is a pressure difference between the upper part and the lower part of the packing part 130, the packing part 130 is opened toward the lower part, so that the outside air is sucked into the oil tank 101. That is, the external air flows into the oil tank 101 through the suction hole 113 formed in the body 110, the first through hole 121 formed in the spool 120, and the second through hole 122. [ Lt; / RTI >

Here, the external air is sucked into the air breather 100 through the path provided by the separation between the first and second concave and convex portions 171 and 173 as shown in FIG. 4B, And is secondly cut off by the partition 170 formed by the first and second concave and convex portions 171 and 173. Here, the moisture blocked by the partition 170 flows downward along the inclined portion 115 and the blocking plate 180 as shown in FIG. 4C.

Although the air breather 100 including both the plurality of partition walls 170 and the shield plate 180 has been described in the foregoing to prevent the inflow of moisture from the outside, Or the like.

Thus, the present invention can be applied to a system for applying, for example, an oil tank 101 for torque assist of an automatic manual transmission, in which, unlike the conventional air breather, intake / The present invention provides an air-circulating air breather 100 that enables air-blowing. As described above, the present invention provides a structure capable of intake / exhaust, and in addition, rubber packing is applied for internal and external pressure control, so that the air breather 100 operates more precisely and efficiently. In addition, when the outside air is sucked into the air breather 100, it is possible to block the inflow of moisture from the outside by the plurality of partitions 170 and the blocking plate 180, ).

Accordingly, the present invention enables intake / exhaustion of air inside and outside, thereby keeping the internal pressure of the oil tank 101 constant, and it is also possible to solve the problems (deviation, leakage, moisture suction) The safety of the transmission improves.

It is to be understood that the present invention is not limited to the above-described embodiment, and various modifications and changes may be made without departing from the scope of the present invention as defined in the appended claims. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

100; Air circulation type air breather
101; Oil tank
102; Thread
110; Body
111; Hollow
112; volt
113; hall
115; End of the body
120; spool
121 first through hole
122; The second through-
123; Third through hole
130; Packing part
131; Rubber packing
131a; Incision
132; O-ring
140; cap
141; End of the cap
150; spring
160; Ball spring assembly
161; ball
162; spring
163; Air filter
170; septum
171: First concave /
173: second concave /
180; Blocking plate

Claims

A body coupled to the vehicle oil tank and having a hollow in the vertical direction;
A spool having at least one through hole coupled to the hollow so as to close the hollow of the body;
A packing portion coupled to the through hole of the spool and being opened or closed according to an internal pressure of the oil tank;
A cap coupled to the body as an upper end of the spool to prevent disengagement of the spool;
A spring coupled between the spool and the cap to press the spool; And
And a plurality of partition walls formed between the body and the cap through which air is sucked and discharged by lifting and lowering the spool,
Wherein a hole is formed in an area of the body corresponding to an outer side of the spool, and a ball spring assembly is coupled to the hole.

The method according to claim 1,
The partition wall
A first irregular portion formed on the cap; And
And a second concavo-convex portion formed on the body and engaged with the first concavo-convex portion at a predetermined interval.

The method according to claim 1,
The end of the body has an inclined portion that is inclined downward for water discharge,
Wherein an end portion of the cap has a bent portion bent downward along the end portion of the body.

The method according to claim 1,
Wherein the body is coupled to the oil tank in a bolt manner.

The method according to claim 1,
And an air filter is further coupled to the hole corresponding to the outside of the ball spring assembly.

The method according to claim 1,
The through-hole of the spool
A first through hole formed in a vertical direction and to which the packing section is coupled;
A second through hole communicating with the first through hole as an upper portion of the packing portion and formed in a horizontal direction; And
And a third through hole communicating with the first through hole and formed in a horizontal direction as a lower portion of the packing portion.

The method according to claim 1,
The packing portion
A rubber packing having at least one incision part; And
And an O-ring closely attached to the lower surface of the rubber packing.

A body coupled to the vehicle oil tank and having a hollow in the vertical direction;
A spool having at least one through hole coupled to the hollow so as to close the hollow of the body;
A packing portion coupled to the through hole of the spool and being opened or closed according to an internal pressure of the oil tank;
A cap coupled to the body as an upper end of the spool to prevent disengagement of the spool;
A spring coupled between the spool and the cap to press the spool; And
And a blocking plate coupled to the inside of the end of the cap and spaced apart from the body by a predetermined distance,
Wherein a hole is formed in an area of the body corresponding to an outer side of the spool, and a ball spring assembly is coupled to the hole.

9. The method of claim 8,
Wherein an end of the body has an inclined portion inclined downward,
Wherein an end portion of the cap has a bent portion bent downward along the end portion of the body.

10. The method of claim 9,
And the blocking plate is coupled to an end of the bent portion toward the body.

9. The method of claim 8,
Wherein the body is coupled to the oil tank in a bolt manner.

9. The method of claim 8,
And an air filter is further coupled to the hole corresponding to the outside of the ball spring assembly.

9. The method of claim 8,
The through-hole of the spool
A first through hole formed in a vertical direction and to which the packing section is coupled;
A second through hole communicating with the first through hole as an upper portion of the packing portion and formed in a horizontal direction; And
And a third through hole communicating with the first through hole and formed in a horizontal direction as a lower portion of the packing portion.

9. The method of claim 8,
The packing portion
A rubber packing having at least one incision part; And
And an O-ring closely attached to the lower surface of the rubber packing.

A body coupled to the vehicle oil tank and having a hollow in the vertical direction;
A spool having at least one through hole coupled to the hollow so as to close the hollow of the body;
A packing portion coupled to the through hole of the spool and being opened or closed according to an internal pressure of the oil tank;
A cap coupled to the body as an upper end of the spool to prevent disengagement of the spool;
A spring coupled between the spool and the cap to press the spool;
A plurality of partition walls formed between the body and the cap through which air is sucked and discharged by lifting and lowering the spool; And
And a blocking plate coupled to the inside of the end of the cap and spaced apart from the body by a predetermined distance,
Wherein a hole is formed in an area of the body corresponding to an outer side of the spool, and a ball spring assembly is coupled to the hole.

16. The method of claim 15,
The partition wall
A first irregular portion formed on the cap; And
And a second concavo-convex portion formed on the body and engaged with the first concavo-convex portion at a predetermined interval.

16. The method of claim 15,
Wherein an end of the body has an inclined portion inclined downward,
Wherein an end portion of the cap has a bent portion bent downward along the end portion of the body.

18. The method of claim 17,
And the blocking plate is coupled to an end of the bent portion toward the body.

16. The method of claim 15,
Wherein the body is coupled to the oil tank in a bolt manner.

16. The method of claim 15,
And an air filter is further coupled to the hole corresponding to the outside of the ball spring assembly.

16. The method of claim 15,
The through-hole of the spool
A first through hole formed in a vertical direction and to which the packing section is coupled;
A second through hole communicating with the first through hole as an upper portion of the packing portion and formed in a horizontal direction; And
And a third through hole communicating with the first through hole and formed in a horizontal direction as a lower portion of the packing portion.

16. The method of claim 15,
The packing portion
A rubber packing having at least one incision part; And
And an O-ring closely attached to the lower surface of the rubber packing.