DEVICE FOR REVERSIBLE ADJUSTING OF A TAPPET

The invention refers to a device for reversible adjusting of a Ventilstöß els with a housing, a version to the Anschluß to a valve, two against each other adjustable parts of exhibiting thermal actuator and two operating pins which can be used alternatively, whereby for the one kind of adjustment the first operating pin is carried forward by the first part and for the other kind of adjustment the second operating pin by the second part of the actuator and that different part of the actuator at the housing in each case is supported.

During a well-known device of this kind (DE-AS 16 00 713) the one or the other operating pin is to be built alternatively in the axle of the thermalstatic actuator. Auß erdem not only the operating pin is to replace but also a bridge element and change a Federanordnung with the change of the one to the other actuation type. One can use from there the adjuster alternatively for a normally open valve (NO) or a normally closed valve (numerical control), muß but if necessary a laborious change make.

Furthermore is an adjuster admits (EP 0,856,692 A1), which is intended for a normally closed valve. Here the operating pin is constantly installed at the edge of a pot, which spreads the thermalstatic actuator and for whose ground by a feather/spring actuated at that the operating pin turned away part of the actuator one holds. Since the operating pin is transferred opposite the actuator axle, the stroke way of the operating pin can overlap the actuator, so partly daß the adjuster a small height has.

The invention is the basis the task to indicate a device of the initially described kind which makes a relieved conversion possible from the kind of adjustment to the other kind of adjustment.

This task becomes erfindungsgemäß thus solved, daß the two operating pins constantly installs, but are da&szlig against each other transferred and; the operating pins and the version in such a manner shiftable are da&szlig, relatively to each other; the version with the first or second operating pin is aligned alternatively.

During this construction a change of the kind of adjustment does not require an exchange of the operating pins. Rather the necessary operating pin is made effective by a relative misalignment between the operating pins and the version. Since the operating pins are installed constantly, also the power transmission ways between actuator and operating pin can be given, so to a large extent daß with the change of the kind of adjustment additionally for the misalignment of the version at the most small changes at the adjuster to be made must.

Preferably the operating pins are arranged to both sides of the actuator axle. In this way the operating pins keep that größ tmöglichen distance from each other, but the smallest possible distance from the axle of the strength-giving actuator.

With a preferential execution form is provided, da&szlig for it; the version and the operating pins relatively to each other are straight-lined shiftable.

A likewise favorable alternative consists of it, daß the version and the operating pins around an axle relatively to each other are swivelling.

Constructionally it is advisable, daß the actuator between the grounds of an inside and a one äuß eren pot arranged is da&szlig and; that äuß ere pot the first operating pin and the internal pot the second operating pin carries. By the use of the inside and äuß eren pot results in the case of small place expenditure a good guidance for the two operating pins.

It is da&szlig particularly favorably; a stronger first feather/spring that äuß eren pot against a housing-firm attack presses, daß a weaker second feather/spring the internal pot against an attack to äuß eren pot presses and daß between the ground of the internal pot and a housing-firm support a free space is intended, into which for the change of the kind of adjustment a spacer piece is herausnehmbar from it insertable or. The spacer piece is au&szlig the only element, that with a change of the kind of adjustment; it the misalignment of the version to be handled muß. The change is very simple from there to carry out.

The moreover it is advisable, daß the housing a front side opening has, in that the ground äuß eren pot is arranged. If the ground from the opening out-steps, this is da&szlig with normally closed valve an indication of the operability and with normally open valve an indication of it; the operating pin an end position reached.

It offers advantages, also daß the Auß enseite the ground äuß eren pot a recess for a tool relative to rotating the operating pins to the version exhibits. A simple tool, for example a coin, is sufficient, in order to shift the version.

The invention is more near described below on the basis in the design of represented preferential remark examples. Herein show:

Fig. 1

a profile by one erfindungsgemäß e adjuster in the kind of numerical control adjustment,

Fig. 2

an opinion from downside on Fig. 1,

Fig. 3

a profile by an adjuster gemäß Fig. 1 in the kind of NO adjustment,

Fig. 4

a profile by a modified execution form in the kind of numerical control adjustment and

Fig. 5

a profile by the adjuster of the Fig. 4 in the kind of NO adjustment.

With the execution form of the Fig. 1 to 3 exhibits a housing 1 a hood 2 and a lower part 3. The housing 1 can be put on with the help of a version 4 on a valve housing.

In the housing is a thermal actuator 5, whose extension off 6, for example wax, is by a heating element 7 heatable. The actuator 5 consists itself of two parts, i.e. the first part of 9 in the form of a piston, that in consequence thermal expansion of the extension material after auß EN shift läß t, and the second part of 8 in the form of an extension off 6 and heating element 7 exhibiting corpus.

A first operating pin 10, that with the Ventilstöß el a normally closed valve to cooperate can, is attached at the edge of a pot 11, whose ground 12 is arranged in an opening 13 of the housing 1. A second operating pin 14 is intended at the ground 15 of an internal pot 16. Into the free space between the ground 15 and the lower part 3 a spacer piece 17 can be brought.

A stronger feather/spring 18 presses that äuß eren pot 11 against a housing-firm attack 19 at the lower part 3. a weaker feather/spring 20 presses the internal pot 16 against an attack 21 to äuß eren pot. The version 4 is from in Fig. 1 and 2 illustrated position, in which the version axle agrees with the first operating pin 10, in Fig. situation illustrated 3 shiftable, in which the version axle agrees with the operating pin 14. The respective position of the version 4 becomes by suggested internal teeth 22 and Auß enverzahnung 23 secured. Auß erdem is illustrated, daß the opening 13 provided with a guidance wall 27 is äu&szlig, around that; eren pot 11 to lead surely.

If the adjuster is intended the form of the Fig for a normally closed numerical control valve and. the following function possesses, arises 1 and 2: In the case of a heating the second part of 8 of the actuator 5 supports itself under inserting the ground 15 and the spacer piece 17 on the lower part 3 of the housing off, during itself the first part of 9 of the actuator after 5 auß EN moves and that äuß eren pot 11 against Kraft of the feather/spring 18 and concomitantly the first operating pin 10 carries forward. By out stepping of the ground 12 from the opening 13 is recognizably, daß the adjuster in enterprise is. By choice of the height of the spacer piece 17 one can make an adjustment of the rest position of the operating pin 10.

If the adjuster is intended for a normally open NO valve, it becomes into the form of the Fig. 3 brought. For this only two steps are to be full-led. First of all the version 4 with the second operating pin 14 is brought in adjustment. Secondly the spacer piece 17 by a lateral opening 24 is removed. If now a heating takes place, the second operating pin 14 for version 4 walks, because itself the first part of 9 of the actuator 5 against the ground 12 äuß eren pot 11 and this pot supports 18 against the housing-firm attack 19 by the stronger feather/spring is held. The second part of 8 of the actuator 5 moves from there under pressing the weaker feather/spring 20 together in the direction of the valve which can be adjusted. Stöß t the operating pin 14 against an obstacle, in particular, if the operated Ventilverschluß piece the seat reached, walks that äuß ere pot 11 against Kraft of the feather/spring after 18 auß EN, which again by the out stepping of the ground 12 from the opening 13 is recognizable.

With the Fig. 4 and 5 becomes for appropriate parts around 100 increased reference symbols opposite the Fig. 1 to 3 uses. The adjustment of the two operating pins 110 and 114 by the thermalstatic actuator 105 is identical to the preceding example. Differently is essentially, daß the housing 101 a baseplate 125 with circular cross section exhibits, which is connected einstückig with an eccentrically arranged version 104. By a relative relative between the lower part 103 and the baseplate 125 one knows the version 104 alternatively with the first operating pin 110 (Fig. 4) or the second Betätigungsgstift 114 (Fig. 5) in adjustment bring. In order to manage this turn, is äu&szlig in the ground 112; eren pot 111 a recess 126 to be planned, into the one tool, like a coin, be inserted can.