DE10249087A1 - Venting valve for transmission or for hydraulic system has a switching control between a fully closed setting and a venting setting - Google Patents

Abstract

A venting valve for a transmission or for a hydraulic system has a body (5) screwed into the fitting and with a venting duct (68) to the outside. A control knob (2) switches the valve between two settings; a fully locked setting and a venting setting. In the fully locked setting the system can be transported and turned without risk of spilling oil of hydraulic fluid. In the venting setting excess air id vented via a spring loaded control valve (3). No separate external sealing means are required. The switching control is reversible.

Description

The invention relates to a transmission or hydraulic system ventilation and / or ventilation device, one basic body having a passage, a closure device on the base body to lock the passage is provided.

State of technology

Devices of the above Art have already become known. In particular, by closing the Passage an undesirable Leakage of oil avoided. This is important, for example, if that gearbox concerned or the hydraulic system during storage or is not positioned as intended during transport.

If the ventilation or aerators This can lead to an uncontrolled leakage of oil into the Environment come, which is associated with a considerable risk potential can be. Especially with gear or hydraulic fluids that are based on hydrocarbons can be based already relatively small leaked amounts to sometimes considerable problems to lead, because a number of hydrocarbons are extremely hazardous to the environment and water. They also reduce friction and can be used, for example trigger a significant risk of slipping.

These negative effects require appropriate ones Countermeasures.

A common embodiment includes a locking tab, which consists, for example, of a rubber membrane covering the passage through the main body tightly closes the device

Should e.g. after storage or transportation the vent or ventilation device can be put into operation pull the locking tab off the valve.

As a further possibility, it is from the state of the art Known technology, for example sealing screw-in nipples the gearbox or hydraulic housing for transportation or provide storage at the location where the device would otherwise for venting or venting is placed.

However, these solutions mentioned can only partially satisfy. A removable locking tab is required with a not inconsiderable effort in the valve or the filter are introduced and is not after their destructive removal more usable.

Also the solution with a screw-in shut-off nipple, involves a relatively high level of effort when replacing the valve or filter unit. Moreover it should be noted that such screw-in nipples are hardly kept for long periods of time and therefore for the case that they are needed again, not available stand.

Task and Advantages of the invention

The invention is based on the object Basically, a device of the type described above is ready make that without the above disadvantages in a compact design simple storage and transport security.

This task is linked with the features of the preamble of claim 1 according to the invention the characterizing features of claim 1 solved.

By the mentioned in the subclaims Features are advantageous designs and further developments of the invention are shown.

The transmission or hydraulic system ventilation according to the invention and / or ventilation device with a basic body with passage has a closure device for closing the passage on, the closure device having a closure element, that on the main body via management bodies is movably arranged and occupy at least two positions on the base body can. In the first position it is ensured that at least from the inside of a ventilated and / or aerating System to the outside no liquid or no gas can escape because the passage is blocked. In In the second position there is at least a passage through the passage temporarily possible e.g. especially when pressure conditions inside a vented and / or aerating Systems need a pressure equalization.

A major advantage of the invention can be seen in the fact that the closure device multiple and is easy to lock or unlock. So that is about entire "useful life" of the device an "lock position" and "open position" adjustable at any time.

In addition, the closure device according to the invention works destructively and does not make an additional one, especially when used multiple times Step for inserting shut-off elements, e.g. flaps necessary.

Last but not least, the proposed one Device with a compact structure can be realized because the closure element on the main body is arranged.

Another advantageous embodiment the invention provides that during the movement of the closure element from the first to the second position and vice versa the closure element constantly in engagement with the base body remains. This ensures a defined adjustment of the closure element and thus a reliable Reaching the desired one Position.

In a further preferred embodiment of the invention, the guide members on the ver closing element and formed on the base body such that the closure element with respect to the base body move from the first to the second position and vice versa by the interaction of the guide members on a clearly predetermined path. This procedure avoids uncontrolled positions of the closure element on the base body and thus increases the reliability of the device. Even if the closure device is not moved, the closure device is in a predetermined position and cannot have an adverse effect on the device itself or on regions located adjacent to it through uncontrolled movements.

In an advantageous embodiment the device according to the invention is in the passage of the body formed a valve unit. All of them are state of the art known suitable valve types can be used in principle. In particular are also common automatic Vent or ventilation valves imaginable. Also are on the main body trained combined ventilation and ventilation valves conceivable. The valve unit is according to the invention blocked in a first position of the closure element, whereas it can work in the intended manner at least in the second position. That in the second position can be reached when predetermined Pressure values in a to be vented and / or aerating System by opening the valve unit is released with the passage in the base body appropriate pressure equalization. Preferably in the valve unit e.g. elastically preloaded ram element used.

For one more preferred embodiment according to the invention The device proposes that when positioning the closure element in a first position and during its movement from the first position to the second position and vice versa, in particular on a clearly defined path, the passage of at least inside out in relation to one to be vented and / or aerating System is blocked and only through in exactly the second position the passage at least when predetermined system values are reached, which a ventilation and / or ventilation make necessary, possible is. Through this embodiment can be particularly safe from accidental leakage of liquid or gas from gearboxes or hydraulic systems can be avoided because such is only possible in one position. This solution ensures in particular also that that is in a locked position Closure element that accidentally, e.g. during transport, slightly moved will not necessarily leakage of oil or the like.

Advantageously snaps or snaps the closure element in the "open position". Through this measure it not only ensures that the device, once it is is activated, remains in the "working position", but also a transition noticeable from the "blocking position" to the "open position" with it for an operator is consciously understandable. In addition can snap the closure element into the "open position" with the advantages mentioned.

It is particularly preferred if the closure element is rotatable. On the one hand, this enables simple activity of the closure element and on the other hand is accidental activity relatively unlikely by twisting, especially if twisting a correspondingly large one Angle between "blocking position" and "open position" is necessary. The rotatable arrangement of the closure element also enables a compact design the device, especially if mostly rotationally symmetrical components be used.

Another particularly preferred embodiment sees one on the body filter unit designed in the passage. The filter unit can space-saving in the basic body be positioned. For A common filter unit can perform filter tasks be provided which the incoming or outgoing liquid and gas flows filters.

In connection with filter units can the device according to the invention to be executed that they are in the "locked position" and possibly also on the way in a "passage position" both from the inside outward as well as from the outside is locked internally in relation to a system, but in the "open position" constantly one Connection from the inside out and vice versa. However, an embodiment is also conceivable in which a filter unit is combined with a valve, so that the functionalities described above can be carried out. Accordingly e.g. in the "passage position" only a continuity at Certain system parameters are reached and the passage is safely blocked in the "blocking position" given inside out on a system, but still a continuity from the outside possible inside is.

The functionality of the closure device can preferably realized by spacers on the closure element that act on the corresponding contours of other elements. For example, is a valve unit designed so that the spacer of the Closure element a movement of the tappet element of a valve unit block only in the "blocking position", however otherwise the free functionality allow the valve. In another case with a device with filter unit the spacers, however, bring a plunger defined in the "blocking position" into a "blocking position" in other possible Positions of the closure element moving the plunger, e.g. allow by a spring element in a "passage position".

Spacers are also easy to use and form space-saving on the corresponding components. They enable exact distances from adjacent elements that are assigned to one another and can also take over other functions in a space-saving manner, such as engagement elements for securing predetermined movement paths or engagement positions.

For attachment to a gear or on a hydraulic system is on the device, for example on the main body advantageously provided a fastening section through which the basic body solvable can be attached. The device e.g. an external thread , which means that it is screwed into a suitable internal thread section can be.

Finally sees a further education of the The object of the invention that this is a known separator which minimizes the amount of gas or liquid caused by can pass the culvert. A separator is straight for particularly sensitive liquids like oil and the like. Suitable for those with sometimes far-reaching consequences when Leaving must be expected. Such known separators can for example, spray pipes, baffle plates or drip catchers.

For the components of the transmission or hydraulic system ventilation and / or ventilation device a number of materials are conceivable. In addition to various Steel materials are particularly suitable for plastics.

figure description

The following drawings show two specific embodiments of the invention, which are given further details and advantages are described in more detail and thereby clarify the invention. Show it:

1a 1 shows a first exemplary embodiment of a device according to the invention, partially in section, with an automatic vent valve in a position in which venting is possible,

1b the partially shown in section embodiment according to 1a in a position in which the passage is blocked,

2a a bottom view of a valve body of the embodiment according to 1a . 1b .

2 B a side view of the valve body according to 2a .

2c a sectional view of the valve body according to 2 B .

2d a top view of the valve body according to 2a .

3a a top view of a rotary cap of the embodiment according to 1a . 1b .

3b a bottom view of the rotary cap according 3a .

3c a sectional view of the rotary cap along the line AB according to 3b .

3d an enlarged partial view of the sectional view according to 3c .

3e a partial view of a sectional view along the line EE according 3b .

3f the sectional view of the rotary cap along the line CD according to 3c .

4a a sectional view of a banjo bolt and a valve body with an O-ring in the assembled state for an embodiment according to 1a and 1b .

4b a top view of the banjo bolt and the valve body of 4a .

5a a partially shown in section a second embodiment of a device according to the invention with a ventilation filter in a position in which ventilation is possible, and

5b the partially shown in section. Embodiment according to 5a in a position in which the passage from the inside to the outside is blocked.

description of the embodiments

The 1a and 1b show a completely assembled automatic vent valve 1 for example for a gear housing (not shown) partially filled with oil with a rotating cap 2 from above a banjo bolt 5 partially encompasses a passage 58 owns, in which a valve body 3 with a spiral spring 4 is arranged. The individual components are positioned concentrically to one another and generally with a longitudinal axis A of the vent valve 1 installed vertically aligned in a gearbox.

The passage 58 the banjo bolt 5 expands from the bottom upwards by ring surfaces 52 . 53a and 53b , In the lower area of the banjo bolt 5 with an external thread 50 is provided, has the banjo bolt 5 a lower opening 51 on. The banjo bolt 5 can about the external thread 50 can be screwed into a gearbox housing (not shown) and seals via an elastic O-ring 7 against this.

In the banjo bolt 5 is the valve body 3 introduced from above. It is shaped on the outside in such a way that it has a small annular gap to the inside of the banjo bolt 5 is spaced. The valve body 3 ( 2a to 2d ) has a lower area with a round pin 30 and a guide part in the upper area 31 on. The upper edge of the guide part 31 shows a ring bridge 32 with four outwardly projecting tongues 33 . 34a . 34b . 34c ,

On the upper outer circumference of the round pin 30 is on a ring surface 30a (S. 2 B ) an O-ring 6 held on tightly. The o-ring 6 borders on a ring surface 31a of the guide part 31 on. The o-ring 6 seals in the case of the blocking valve 1 ( 1a . 1b ) between the ring surface 31a and the ring surface parallel to it 52 the banjo bolt 5 the passage 58 from the opening 51 to the space outside the valve 1 from. Outside on the round pin 30 are four vertically recessed evenly up to the ring surface 30a running semicircular grooves 35 trained, which serve as "through channels".

When vented, gases can go up to a lid 20 the rotating cap 2 rise and then redirected through an inside 20a of the lid 20 down through eight flow channels as an example 21 ( 3b . 3d . 3f ) on the inside of a ring jacket 22 flow out into the environment.

Locking the passage 58 through the vent valve 1 takes place by the sealing contact of the O-ring 6 on the ring surfaces 31a and 52 , Between the O-ring 6 and the inside of the banjo bolt 5 a narrow annular passage gap s (see. 1a ) free.

So that the O-ring 6 to block the passage 58 through the vent valve 1 with a predetermined force against the ring surface 52 is pressed, is in the middle of the guide part 31 hole open to the top 36 the coil spring 4 inserted. It also brings a restoring force after the passage is released 58 through the vent valve 1 on the valve body 3 on. As a support surface for the spiral spring 4 , serves a hole base 36a the hole 36 and the inside of the lid 20a of the lid 20 ,

The twist cap 2 shows how special from the 3b . 3c . 3d and 3f emerges on the inside of her ring jacket 22 here, for example, eight vertically downward webs 23 on. These run parallel and evenly spaced from one another over the inner circumference. The one with beveled flanks 23a ( 3d . 3f ) molded webs 23 have vertically raised latching lugs vertically across the web width 25 on in the assembled state in a correspondingly shaped circumferential annular groove 54 (see esp. 4a ) the banjo bolt 5 to run.

The snap-in lugs 25 and the ring groove 54 engage in each other so that the twist cap is fixed vertically 2 to the banjo bolt 5 or at the same time a guide when the rotary cap is rotated 2 is possible.

When the vent valve is assembled 1 In the event of a pressure increase in the interior of the transmission, the interior of the transmission can be vented according to the known principle of conventional vent valves. When a threshold value is exceeded, pressure forces result in the effective surfaces directed towards the inside of the transmission 35a . 35b of the round pin 30 act against the spring force to move the valve body 3 up and give the passage 58 for escaping liquid and / or escaping gas until the pressure inside the gearbox drops.

The vent valve shown 1 has a mechanism according to the invention, with which it can be optionally set whether the vent valve 1 as usual works on the known principle, or whether the passage 58 should be blocked permanently.

This is achieved by placing the cover as often as desired in an external position, for example by hand 2 can be twisted to the passage 58 to block (see 1b ) or in a different position with certain system values, e.g. a threshold value of the internal pressure, to enable continuity (see 1a ). When the passage is blocked 58 becomes the vertical movement of the valve body 3 upwards from the state of the closed vent valve 1 prevented.

For turning the rotating cap 2 , is the outside of the ring jacket 22 with vertical turning aids 22a fitted.

By twisting the rotating cap 2 come two diametrically on the inside of the lid 20a Opposed round-conical spacer teeth 26a . 26b in a locking position, each with a pair of diametrically opposite recesses 37a . 37b respectively. 38a . 38b in an upper end face arranged ring surface 39 of the valve body 3 ,

The two spacer teeth 26a . 26b move when rotating along sections of a circular path K (s. 4b ) with the radius r around the longitudinal axis A. Starting from the first position (see 1b ), there are the spacer teeth 26a . 26b after rotation by 90 ° in the second position (see 1a ). The spacer teeth come here 26a . 26b depending on the selected position in an adjacent position to the pairs of similar recesses 37a . 37b ( 1a ) respectively. 38a . 38b ( 1b ).

The circular funnel-shaped recesses here as an example 37a . 37b are in contrast to the recesses 38a . 38b deeper, ie to the top of the funnel, in the ring surface 39 spared. Due to their size and shape, the valve body moves vertically 3 from the position of the blocked passage 58 through the vent valve 1 not blocked upwards.

In the position according to 1a is the vent valve according to the invention 1 works automatically in a known manner.

In contrast, the position according to 1b prevents the valve body if the pressure in the gearbox housing increases accordingly 3 is moved upwards and thereby a passage 58 through the vent valve 1 releases. This is due to the presence of the spacer teeth 26a . 26b in the recesses that are locked there 38a . 38b on the valve body 3 enforced.

The valve body 3 can move upwards until the spacer teeth 26a . 26b in the respective recesses 37a . 37b such as 38a . 38b queue.

In the blocking position there are also two neighboring ones on the ring bridge 32 tongues projecting radially outwards 33 . 34a . 34b . 34c up against two on the inside of the lid 20a trained spacers 27a . 27b (S. 3b ) on. Limiting the vertical movement of the valve body 3 upwards thus reliably prevents undesired oil leakage to the outside.

So that a defined rotation of the rotating cap 2 opposite the banjo bolt 5 or the valve body 3 is possible by a quarter-ring-shaped guide bar 28 (S. 3c ) on the inside of the lid 20a , in the area of the transition to the ring jacket 22 (S. 3d ) educated. The boardwalk 28 has a curved inner surface that runs concentrically to the longitudinal axis A. 28a , which is spaced slightly further from the longitudinal axis A than the outer circumferential surfaces of the tongues, which are at a uniform distance from the longitudinal axis A 33 . 34a . 34b . 34c so that the curved inner surface 28a on the outer peripheral surfaces of the corresponding tongues 33 . 34a . 34b . 34c can turn past. A horizontal downward sloping contact surface 28b of the guide bridge 28 runs when turning the rotating cap 2 on an opposite end face of the ring 55a the upper margin 55 the banjo bolt 5 , The edge area 55 which is just over half of the entire top ring area of the banjo bolt 5 includes, is slightly offset in relation to the subsequent upper edge area 56 that has an upper ring surface 56a includes. The contact surface 28b of the guide bridge 28 can only by a maximum of 90 ° on the upper ring surface 55a twist until one of two narrow sides 28c . 28d of the guide bridge 28 on one of two paragraphs 57a . 57b pending. The paragraphs 57a . 57b arise at the dividing line between the raised edge area 56 and the lower edge area 55 at the top of the banjo bolt 5 ,

Twisting the twist cap 2 is essentially through the interaction of the guide bar 28 with the top ring surface 55a and paragraphs 57a . 57b certainly.

Out 4b it can be seen that the tongue 33 a slightly larger circumferential dimension than the other three tongues 34a . 34b . 34c having. This ensures that the banjo bolt 5 and the valve body 3 fit into each other only if the recess 33 in the middle in the upper edge area 56 . 56a is positioned.

As in 3a can be shown by way of example on the outside of the cover, which is usually visible to, for example, operating personnel 20 general information or notes on the direction of rotation for a corresponding setting.

Both in the position according to 1a and 1b , as well as when turning the rotating cap 2 , there remains a tension between the valve body 3 and rotating cap 2 receive. In the first position (see 1b ) this is due to the contact of the spacer teeth 26a . 26b in the recesses 38a . 38b achieved with the spacer teeth 26a . 26b the valve body 3 with the O-ring 6 down against the ring surface 52 to press. In the second position (see 1a ) the voltage results from that between the valve body 3 and the rotating cap 2 used coil spring 4 , Finally, the twist cap also remains in place 2 by the contact of the spacer teeth 26a . 26b on the ring surface 38 of the valve body 3 receive a tension, causing the valve body 3 with the O-ring 6 securely against the ring surface 52 is pressed.

In 5a and 5b a further embodiment of a device according to the invention is shown which, in contrast to that in FIGS 1a to 4b shown vent valve 1 a filter unit 9 shows, being in the banjo bolt 5 a closing body 8th in place of the valve body 3 is provided. The closing body 8th is essentially identical to the valve body described above 3 ,

The twist cap 2 and the banjo bolt 5 are identical to the components shown according to the 1a to 4b ,

A difference to the components shown above is in the area in which the round pin 30 is formed. This area has a concentric bore 80 on that up in a guide part 81 enough. A coil spring 82 lies on the hole base 80a on a top 83a a round filter insert 83 on. The filter insert 83 is by the coil spring 82 against an annular shoulder 59 at the bottom of the banjo bolt 5 pressed and touches the inside of the banjo bolt 5 on.

The filter insert 83 can be constructed like a conventional filter that works in a known manner.

In 5a a state is shown in which the rotary cap 2 relative to the banjo bolt 5 and the closing body 8th is positioned so that the spacer teeth 26a . 26b vertically adjacent to the recesses 37a . 37b are. The closing body 8th thus allows permanent passage from the outside in or vice versa by the spiral spring 82 the filter body 8th against the spacer teeth 26a . 26b the rotating cap 2 suppressed. The O-ring lifts 6 from the ring surface 52 , with a passage through the filter body via an annular gap system 8th is released.

As in 5b is indicated after turning the rotating cap 2 the passage 58 through the filter 9 blocked. The O-ring is in this position 6 sealing on the ring surface 52 the banjo bolt 5 on. The spacer teeth 26a . 26b prevent vertical movement of the closing body 8th ,

The mechanism of locking the filter 9 analogous to that for the vent valve 1 mechanism described.

1

vent valve

2

rotating cap

3

valve body

4

spiral spring

5

Hohlschraube

6

O-ring

7

O-ring

8th

closing body

9

filter

20

cover

20a

Inside cover

21

flow channel

22

ring jacket

22a

turning aids

23

web

23a

Steg edge

24

Ring jacket edge

25

catching lugs

26a

Gap tooth

26b

Gap tooth

27a

spacer web

27b

spacer web

28

guide web

28a

Inner surface

28b

land surface

28c

narrow side

30

round peg

30a

ring surface

31

guide part

31a

ring surface

32

ring land

33

tongue

34a

tongue

34b

tongue

34c

tongue

35

semicircular groove

35a

effective area

35b

effective area

36

drilling

36a

Hole bottom surface

37a

recess

37b

recess

38a

recess

38b

recess

39

ring surface

50

external thread

51

opening

52

ring surface

53a

ring surface

53b

ring surface

54

ring groove

55

border area

55a

ring surface

56

border area

56a

ring surface

57a

paragraph

57b

paragraph

58

passage

59

paragraph

80

drilling

80a

Hole bottom surface

81

guide part

82

spiral spring

83

filter cartridge

83a

top

Claims (11)

Gearbox or hydraulic system ventilation and / or ventilation device (1) which has a base body ( 5 ) with one pass ( 58 ), wherein a closure device ( 2 . 3 . 5 . 6 ) to close the passage ( 58 ) is provided, characterized in that the closure device ( 2 . 3 . 5 . 6 ) a closure element ( 2 ), which on the base body ( 5 ) through management bodies ( 25 . 28 . 54 . 55 ) is movably arranged that the closure element ( 2 ) at least two positions on the base body ( 5 ) can take, the passage (in a first position 58 ) is blocked at least from the inside to the outside with respect to a system to be vented and / or aerated and in a second position a passage through the passage ( 58 ) is possible at least when predetermined system values are reached, which require ventilation. Device according to claim 1, characterized in that the guide members ( 25 . 28 . 54 . 55 ) are designed such that when the closure element () 2 ) from the first position to the second position and vice versa, the closure element ( 2 ) in constant engagement with the base body ( 5 ) remains. Device according to claim 1 or claim 2, characterized in that the guide members ( 25 . 28 . 54 . 55 ) on the locking element ( 2 ) and on the base body ( 5 ) are designed such that the closure element ( 2 ) in relation to the basic body ( 5 ) from the first to the second position and vice versa, through the cooperation of the management bodies ( 25 . 28 . 54 . 55 ) moved on a clearly defined path. Device according to one of the preceding claims, characterized in that on the base body ( 5 ) in the passage ( 58 ) a valve unit ( 3 ) is trained. Device according to one of the preceding claims, characterized in that the valve unit ( 3 ) a plunger element ( 30 . 31 ) includes. Device according to one of the preceding claims, characterized in that when positioning the closure element ( 2 ) in the first position and when moving from the first Position to the second position and vice versa, especially on the clearly defined path, the passage ( 58 ) is blocked at least from the inside to the outside in relation to a system to be vented and / or ventilated and only in the second position is a passage through the passage ( 58 ) is possible at least when predetermined system values are reached, which require ventilation. Device according to one of the preceding claims, characterized in that the closure element ( 2 ) is rotatable. Device according to one of the preceding claims, characterized in that on the base body ( 5 ) in the passage ( 58 ) a filter unit ( 8th ) is trained. Device according to one of the preceding claims, characterized in that the closure element ( 2 ) Spacer ( 26a . 26b ) which is from the closure element ( 2 ) on the valve ( 3 ) and / or filter unit ( 8th ) act in such a way that when positioning the closure element ( 2 ) in the first position, the passage ( 58 ) is blocked at least from the inside to the outside with respect to a system to be vented and / or ventilated and in the second position a passage through the passage ( 58 ) is possible at least when predetermined system values are reached, which require ventilation. Device according to one of the preceding claims, characterized in that on the base body ( 5 ) a mounting section ( 50 ) is provided for attachment to an insertion section of a system to be vented and / or aerated. Device according to one of the preceding claims, characterized characterized in that a separator is provided.