EP1706611B1 - Anti-twist device for a container - Google Patents

Abstract

An anti-twist device for a sealing cap that is located on a fixed connecting piece of a motor vehicle radiator. The sealing cap comprises an external cap part with a grip element and a sealing element, which can be connected to a counter sealing element of the connecting piece and in relation to which the grip element can be rotated. The sealing cap also comprises an internal cap part comprising a valve assembly that is configured in an excess/negative pressure combination. An anti-twist stop acts in the external cap part between the grip element and the sealing element. An anti-twist device of this type has a no-load function instead of a locking function and yet has a simple construction and is easy to produce. To achieve this, the anti-twist stop can be actuated by means of a drive, which is controlled by the operating data in the container and is located inside said container in close proximity to the external cap part.

Description

The present invention relates to a Abschraubsicherungsvorrichtung for a on a stationary neck of a container, in particular motor vehicle radiator, applied or applied cap according to the preamble of claim 1.

In such from the DE 100 35 729 A1 known Abschraubsicherungungsvorrichtung the rotation is designed as a coupling insert whose axial extension and engagement movement is derived from a pressure-dependent axial movement of a valve body of the valve assembly. This type of drive the anti-rotation is relatively expensive and especially not applicable when a running in excess pressure / vacuum combination valve assembly is not present.

A simplified anti-rotation between the closure element of the closure lid on the one hand and the container on the other hand is in the DE 101 64 669 A1 described, in which a housed within the container drive is provided with a locking pin, which can dive directly into the closure element of the closure lid. This means that the Abschraubsicherung is designed such that a rotational lock between the cap and container is made. The disadvantage of this is that it can not be differentiated from the outset, whether the closure lid is only firmly seated or locked, which means that possibly can break off with too much effort of the locking pin.

The object of the present invention is therefore to provide a Abschraubsicherungsvorrichtung for a on a stationary neck of a container, in particular motor vehicle radiator, applied or applied closure lid of the type mentioned, on the one hand instead of a locking has an idle function and the other, however, constructive and manufacturing technology is simpler.

To solve this problem, the features specified in claim 1 are provided in a Abschraubsicherungsvorrichtung for a on a stationary neck of a container, in particular motor vehicle radiator, applied or applied cap.

The inventive measures results on the one hand, a rotation in the form of an idle connection between the handle element and closure element of the lid outer part and beyond acting on this rotation drive connection, which emanates from within the container and thus directly present in the container pressure or the existing temperature in the container is exposed. A possibly damaging mechanical connection between container and cap does not exist.

In a preferred embodiment of the drive, the features are provided according to either claim 2 or claim 3. The individual drive parts according to claim 3, for example, be held by a ring in position or in the manner as described by the features of claim 4, whereby a spatially immediate association between the drive in the container and the rotation in the cap is reached. For constructional and assembly technical simplification, the features may be suitably provided according to one or more of claims 5 to 11.

According to the features of claim 12, the drive in the container is pressure-controlled; It is also possible that this is thermally controlled.

Advantageous structural embodiments of the anti-rotation lock result from the features of one or more of claims 13 to 16.

The present invention further relates to a unit comprising container with nozzle and closure cover or container neck and closure cap, which is provided according to the features of claim 17 with a Abschraubsicherungsvorrichtung invention.

Figur 1

in schematischer längsgeschnittener Darstellung einen auf einen Kraftfahrzeugkühler aufgebrachten Verschlussdeckel mit druckgesteuerter Verdrehsicherung in gekuppeltem Zustand gemäß einem bevorzugten Ausführungsbeispiel vorliegender Erfindung,

Figur 2

einen Schnitt längs der Linie II-II der Figur 1,

Figur 3

eine der Figur 1 entsprechende Darstellung, jedoch mit der Verdrehsicherung in ausgekuppeltem Zustand und

Figur 4

einen Schnitt längs der Linie IV-IV der Figur 3.

Further details of the invention can be found in the following description in which the invention with reference to the embodiment shown in the drawing is described and explained in more detail. Show it:

FIG. 1

in a schematic longitudinal sectional view of an applied to a motor vehicle radiator cap with pressure controlled rotation in the coupled state according to a preferred embodiment of the present invention,

FIG. 2

a section along the line II-II of FIG. 1 .

FIG. 3

one of the FIG. 1 corresponding representation, but with the anti-rotation in the disengaged state and

FIG. 4

a section along the line IV-IV of FIG. 3 ,

The Abschraubsicherungsvorrichtung 10 shown in the drawing according to a preferred embodiment is used for operational prevention of unscrewing a closure cap 11 from the nozzle 12 of a container 13, such as a motor vehicle radiator, then when due to the operating condition of the container (increased pressure or temperature) unscrewing the cap 11 of the container neck 12 for the user can bring dangers.

The closure lid 11 has an outer lid portion 14, which is provided with a handle member 16 and a closure member 17, the latter here an internal thread 18 for screwing and unscrewing the closure lid 11 on or from the opening of the provided with an external thread 19 closing nozzle 12 of Motor vehicle radiator 13 or other container is used. It is understood that the closure element 17 may be provided instead of a threaded with a bayonet or Renkverschlussteil, which can be connected to a corresponding closure part on the neck. On the inside of the closure lid 11, a lid inner part 21 is arranged concentrically to the closure element 17 and this hanging, which is opposite to the closure element 17 of the lid outer part 14 rotatably but axially held. The cover inner part 21 may be formed in a manner not shown as a valve pot, which may for example have an overpressure / negative pressure valve arrangement, the pressure relief valve is controlled in one or two stages.

As can be seen from the drawing, the grip element 16 is slipped over the closure element 17 and engages under it in an annular manner, wherein an inner ring projection 23 of the grip element 16 engages under an outer ring projection 34 of the closure element 17. Thus, the grip element 16 is opposite to the Although closure member 17 held freely rotatable but axially fixed. The counter support or support is formed by the two adjoining cover walls 26 and 27 of gripping element 16 and closure element 17.

To make the handle member 16 and the closure member 17 on the one hand for certain operating conditions relative to each other freely rotatable and on the other hand to achieve a rotationally fixed connection for the normal state, a switchable or detachable anti-rotation 30 is provided between the handle member 16 and the closure member 17. The anti-rotation device 30 here has two diametrically opposite engageable and disengageable coupling elements 31, each of which in engagement position according to FIG. 1 is loaded by a compression spring 29. Each coupling element 31 has an axially directed to the underside of the closure element 17 coupling pin 36 and a fixedly connected approximately trapezoidal coupling latch 37. The coupling pin 36 of the longitudinally substantially substantially T-shaped coupling element 31 is axially movable within the closure element 17, for example in a bore but held against rotation. The coupling bolt 37 has radially on the outside a toothing 43, which with a radially inner toothing 44 on an inner circumferential annular collar 33 of the handle member 16 according to the FIGS. 1 and 2 is brought into rotationally fixed connection. In other words, in the pressureless initial state of the container 13, corresponding to FIGS. 1 and 2 , The coupling bar 37 is under the action of the compression spring 39 positively in the annular collar 33 of the handle member 16 and in this engaged clutch position on a ring wall 32 of the closure element 17. The compression spring 39 and the coupling latch 37 facing away from the free end of the coupling pin 36 is within a Container 13 towards open annular space of the closure element 17th

For the axial disengagement movement in the direction of the arrow A of the coupling element 31, a drive 45 is provided in the container 13, which is provided on a wall of the container 13 surrounding the closure nozzle 12 below the external thread 19 and within the container 13. The drive 45 consists of two drive parts 47, which are arranged on diametrically opposite sides of the closure wall 12 surrounding the annular wall 46 from the bottom in the container 13 hanging. Each drive member has a cylindrical housing 48 which depends from the annular wall 46 and at its bottom 49 has an opening 51 into the container interior. The two drive parts 47 are in parallel axial alignment below the coupling pin 36 of the relevant coupling element 31. Within the housing 48, a piston 52 with axial plunger 53 and a compression spring 54 are provided in the form of an upside down T. The compression spring 45, which is supported on an inner side of the housing 48, pushes the piston 52 against the bottom 49 of the housing 48. The housing 48 consists essentially of a hood part 56, which is provided with a passage 57, and a basket part 58 whose bottom 49 has the annularly arranged openings 51. The basket part 58 is pushed with its end facing away from the bottom 49 on the end facing away from the passage 57 of the hood part 56 and held latching. In this case, between a ring end face of the hood part 56 and an annular shoulder of the basket part 58, a diaphragm 59 is clamped, which lays around the piston 52 and thus seals the housing interior with respect to the container interior. The passage 57 of the hood part 56 is pressed into a bore 61 of the annular wall 46 of the container 13 or otherwise held such that there is a tight connection. The annular surface of the hood part 56 around the passage 57 is provided with an O-ring 62, with which a sealing effect is achieved in such a way that the Hood part 56 between the annular wall 46 perpendicular projecting container walls 63, 64 is positively locked at the ring point 65. The passage 57 of the hood part 56 is such that the plunger 53 of the piston 52 of the drive part 47 in the unpressurized state according to FIG. 1 the passage 57 penetrates but does not dominate.

Thus, the two drive parts 47 are exposed to the internal pressure in the container 13. If the internal pressure in the container 13 exceeds the predetermined permissible pressure, the piston 52 is moved with the plunger 53 in the axial direction A, wherein the plunger 53 strikes the coupling pin 36 and the coupling latch 37 of the coupling element 31 from the rotationally fixed connection with the handle member 16 disengages ( Figures 3 and 4 ). In this disengaged from the rotationally fixed position of the coupling bolt 37, the handle member 16 rotates relative to the closure member 17 hollow, so that unscrewing the closure lid 11 from the nozzle 12 of the container 13 is not possible. Only when the internal pressure in the container 13 decreases again, the piston plunger 53 and, as a result, the coupling pin 36 or -bar 37 moves under the action of the respective compression spring 54 and 39 in their in the FIGS. 1 and 2 illustrated starting position and thus clutch engagement back. This can be done in any relative rotational position of the handle member 16 relative to the coupling elements 31, since the teeth 44 is provided in the annular collar 33 of the handle member 16 over the entire 360 ° circumference.

It should also be mentioned that a stop is integrated in a non-illustrated manner in the closure lid, which ensures that in the state in which the closure lid 11 is screwed onto the closure neck 12, the two coupling elements 31 of the anti-rotation 30 the two drive parts 47 of Drive 45 axially facing.

Although in the illustrated embodiment, two diametrically opposed coupling elements 31 and correspondingly two diametrically opposed drive parts 47 are provided, it is understood that more than two such pairs of elements, for example offset by 90 °, two more diametrically opposite each other. But it is also possible to make do only with a pair of coupling element 31 and drive part 47.

Furthermore, it is possible to provide the driving parts 47 with a thermal expansion element responsive to the internal temperature in the container 13 instead of a piston responsive to the internal pressure conditions in the container 13.

Claims (17)

1. An anti-twist device (10) for a sealing cap (11), mountable or mounted on a fixed connecting piece (12) of a container (13), which cap has having an external cap part (14) with a grip element (16) and with a sealing element (17) that is connectable to a counterpart sealing element (19) of the connecting piece (12), relative to which sealing element the grip element is kept relatively rotatable, and the cap also has an internal cap part (21) with a valve assembly, and in the external cap part (14) an anti-twist stop (30) acts between the grip element (16) and the sealing element (17), the anti-twist stop (30) being actuatable by means of a drive (45) triggered by the operating data in the container (13), characterized in that the drive (45) is accommodated near the external cap part (14), and has at least one drive part (47), disposed on a circumferential region of a container wall (46) adjacent to the connecting piece (12).
2. The anti-twist device as defined by claim 1, characterized in that the drive (45) is formed by two or more drive parts (47), distributed uniformly over the circumference of a container wall (46) adjacent to the connecting piece (12).
3. The anti-twist device as defined by claim 2, characterized in that each of two drive parts (47) is disposed, held separately, inside the container (3) and tangentially below the counterpart sealing element (19) of the connecting piece (12).
4. The anti-twist device as defined by claim 3, characterized in that each drive part (47) is received in a housing (48) that is held suspended from the container wall (46).
5. The anti-twist device as defined by claim 4, characterized in that the housing (48) is held in pressuretight fashion in a recess (61) in the container wall (46).
6. The anti-twist device as defined by claim 4 or 5, characterized in that the housing (48) is composed of a hood part (56), protruding from the container wall (46), and a basket part (58), whose bottom (49) is provided with an opening (51).
7. The anti-twist device as defined by claim 6, characterized in that the hood part (56) is provided with an axial leadthrough (57), which penetrates the container wall (46) and is held in it in pressuretight fashion.
8. The anti-twist device as defined by claim 6, characterized in that the hood part (56) and the basket part (58) are joined, locking over and in one another.
9. The anti-twist device as defined by at least one of the foregoing claims, characterized in that each drive part (47) has a vertically oriented actuation bolt (53), which, facing toward the anti-twist stop (30), penetrates the container wall (46).
10. The anti-twist device as defined by claim 9, characterized in that the actuation bolt (53), on its end remote from the anti-twist stop (30), is covered by a diaphragm (59), which is fastened tightly between the hood part (56) and the basket part (58).
11. The anti-twist device as defined by at least one of the foregoing claims, characterized in that the drive part (47) is pressure-controlled, and its actuation bolt (53) is spring-loaded in the opposite direction.
12. The anti-twist device as defined by at least one of the foregoing claims, characterized in that the anti-twist stop (30) has a horizontally disposed and axially movable coupling unit (31), which has a number of separate coupling elements (31), corresponding to the number of drive parts (47), which coupling elements are each diametrically opposite the drive part or drive parts (47).
13. The anti-twist device as defined by claim 12, characterized in that the coupling element (31) is joined in a manner fixed against relative motion to an axial bolt (36), which can be acted upon by the actuation bolt (53) counter to the action of a compression spring (39).
14. The anti-twist device as defined by claim 12 or 13, characterized in that the coupling element (31) is disposed in a manner fixed against relative rotation in the sealing element (17) of the external cap part (14) and is provided radially on the outside with a set of teeth (43) which upon axial motion of the coupling element (31) can be brought into and out of engagement in a manner fixed against relative rotation with a corresponding set of teeth (44) in the grip element (16) of the external cap part (14).
15. The anti-twist device as defined by at least one of the foregoing claims, characterized in that the valve assembly is embodied as an excess/negative pressure combination.
16. The anti-twist device as defined by at least one of the foregoing claims, characterized in that the container (13) is a motor vehicle radiator.
17. A unit comprising a container (13) having a connecting piece (12), or comprising a container connecting piece (12) and a sealing cap (11), having an anti-twist device (10) as defined by claim 1 and optionally at least one of the ensuing claims 2 through 16.

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