HK1237012B - Housing for driving device of door or window - Google Patents

Description

Housing for a drive device for a door or window

Technical Field

The invention relates to a housing for a drive device for a door or window.

Background

Drive devices for door leaves or window sashes are generally known. They can be designed as bottom door closers or as door or window drives placed above. The housing is at least partially filled with hydraulic fluid for lubrication or for control purposes. Furthermore, an overflow channel and a valve for hydraulic liquid are arranged in the drive device, which overflow channel and valve are used to control the characteristics of the drive device. The driving device can be a pure manual driving device or an automatic driving device.

In the event of a fire, the hydraulic fluid contained in the housing of the drive expands due to the rising temperature. The air contained here can be subjected to expansion of the hydraulic liquid up to a defined volume. In the event of a temperature exceeding a certain value, there is therefore the risk of hydraulic fluid suddenly escaping from the housing. To avoid this, it is known from DE 202005002474U 1 and DE 4101640 a1 to release the pressure compensation chambers in order to compensate for the overpressure that occurs, in that pressure-and/or temperature-dependent plugs located between the hydraulic chambers and the pressure compensation chambers are released as a result of the overpressure or temperature, and hydraulic fluid can flow into the pressure compensation chambers as a result.

Disclosure of Invention

The invention is based on the object of providing a housing for a drive of a door or window, in which a pressure compensation function can be implemented.

According to the invention, this object is achieved by a housing having the features described below. The housing of the drive device for a door or window according to the invention has a hydraulic chamber filled with hydraulic fluid and a pressure compensation chamber, which is separated from the hydraulic chamber filled with hydraulic fluid by a pressure-and/or temperature-dependent plug, is characterized in that the plug is arranged in a through-opening in a sleeve which can be inserted into the housing, and at least one additional guide channel is provided along the sleeve, through which hydraulic fluid and/or air can freely pass.

The housing of the drive for a door or window comprises a pressure compensation chamber which contains air or which is even evacuated and which is separated from the hydraulic chamber by a pressure-and/or temperature-dependent plug which is arranged in a through-opening of the sleeve through which hydraulic liquid and/or air can pass after opening the plug. The plug is designed such that it opens when a defined internal pressure and/or a defined elevated temperature in the housing is reached, whereby the internal pressure in the housing drops.

In a preferred construction, the temperature dependent plug comprises a fuse. In the event of a fire, the pressure compensation chamber is thus opened to the hydraulic chamber by the fuse melting, and the hydraulic fluid can then expand into the pressure compensation chamber.

The pressure compensation function in the drive device provided for the case of a fire is therefore implemented in a simple and cost-effective manner.

The sleeve is provided with at least one additional guide channel through which hydraulic liquid and/or air can freely pass. The hydraulic liquid and the air present can thus flow freely along the sleeve, whereby a pressure or temperature equilibrium is achieved.

The at least one additional guide channel can be formed through the sleeve wall, open into the circumference of the sleeve or be arranged directly on an opposite inner wall in the housing or in a housing insert.

Preferably, the at least one additional guide channel opens as a groove into the sleeve along its extension.

Preferably, the at least one additional guide channel opens into the housing or into the housing insert along the extension of the sleeve.

In one embodiment, the plug is first opened as a result of the increased pressure and/or increased temperature, then the hydraulic fluid enters the pressure compensation chamber and the hydraulic fluid and/or air is guided further out of it, if necessary, via the guide channel or guide channels.

Two guide channels, which are arranged offset from one another in such a way that each guide channel can guide hydraulic liquid and/or air, are likewise advantageous. Here, air usually escapes from below to above. For this purpose, it is an advantageous configuration for the guide channel to be designed as a spiral, each of these spirals defining a direction.

A particular advantage in a guide channel offset by 180 ° is that the sleeve fulfills its task even if the housing of the drive device is rotated by 180 ° about its longitudinal axis, as may be necessary for some installation situations.

Preferably, the guide channel extends as a spiral along the extension of the sleeve.

Preferably, the guide channel opens into an annular channel on the sleeve.

Preferably, at least one guide channel leads out of the housing.

In the event of a fire, after opening the pressure-and/or temperature-dependent plug, the hydraulic fluid contained in the hydraulic chamber can expand in the pressure compensation chamber, so that it can remain in the drive until a certain temperature. From the point in time of opening the pressure-and/or temperature-dependent plug, ambient pressure is again present in the hydraulic liquid. Furthermore, the guide channel can also conduct air or, in the event of a fire, hydraulic fluid out of the housing, so that the pressure in the hydraulic fluid is not so high.

According to an advantageous alternative embodiment, the guide channel can be designed in a targeted manner as a labyrinth towards or away from the through-opening, in which guide channel air or hydraulic fluid is present and which can easily lead away these fluids when the pressure in the housing rises. Preferably, at least two guide channels form a labyrinth in the housing, one of which comprises an upward discharge and the other comprises a downward discharge when the housing is assembled.

It is also particularly advantageous if the labyrinth is designed symmetrically, so that it is also possible to mount the drive device in a 180 ° rotation about the longitudinal axis of the housing. Such a position independence is advantageous in particular for alternative installations on the hinge side or the hinge opposite side of the door or window or for alternative installations on the leaf or on the frame.

An additional possibility for pressure compensation consists in providing a separately formed chamber in the housing which is filled with a defined air volume after filling with hydraulic liquid and which is connected to the hydraulic chamber. It is therefore also possible to increase the air fraction in the hydraulic chambers after filling the housing with hydraulic liquid, which is necessary for the function. For this purpose, the chamber must be closed off after filling.

Preferably, an attachment for filling the housing with hydraulic fluid is provided at the inner end of the additional chamber, and the additional chamber can be closed off to the outside at the opposite end after filling.

Drawings

The invention is explained in more detail below with reference to the drawings; wherein:

figure 1 shows a partial cross-sectional view of an exemplary embodiment of a housing of a drive device for doors or windows according to the invention,

figure 2 shows an enlarged view of the sleeve,

figure 3 shows an enlarged cross-sectional view of the sleeve,

fig. 4 shows a schematic cross-sectional view of the function of the sleeve in the form of a labyrinth.

Detailed Description

The drive 1, which is partially shown in fig. 1, comprises a housing 2 and a spring 4, which is located in a hydraulic chamber 3 of the housing 2 filled with hydraulic fluid and which serves to drive a door or window.

The housing 2 has, in addition to the hydraulic chambers 3 filled with hydraulic fluid, a pressure compensation chamber 5, which is separated from the hydraulic chambers 3 by pressure-and/or temperature-dependent plugs 6. In the event of a fire, it is possible for high temperatures and thus high pressures to occur in the housing 2 as well. For this purpose, it is provided that the plug 6 is opened and hydraulic fluid can enter the pressure compensation chamber 5 in order to reduce the pressure. A simply functioning plug 6 is realized here by a fuse whose material changes due to the high temperature and thus releases the plug 6.

The plug 6 is formed in a through-opening 7 of a sleeve 8 which is inserted into the housing 2 and fixed there. For sealing between the hydraulic chamber 3 and the pressure compensation chamber 5, an annular seal 9 can be applied to the circumference of the sleeve 8.

Fig. 2 and 3 show the sleeve 8 in detail. In addition to the passage opening 7 and the pressure-and/or temperature-dependent plug 6, the sleeve has at least one additional guide channel 10, through which hydraulic fluid and/or air can freely pass and which is guided, for example, into an annular channel 11 on the sleeve 8 or into the pressure compensation chamber 5, as a result of which the pressure in the housing 2 is regulated. The guide channel 10 can also be configured as a bore in the sleeve 8. In this case, it can also be provided that the guide channel 10 leads these fluids out of the housing 2 from a specific pressure or a specific temperature in the housing 2.

A guide channel 10 or guide channels (10, 12) open as grooves along the extent of the sleeve 8, or can also be formed in the housing 2 or in a housing insert relative to the sleeve 8.

Advantageously, at least two guide channels 10, 12 are provided, which are arranged offset from one another in the circumferential direction along the extension of the sleeve 8. The flow of hydraulic fluid and gas can thus be controlled when required.

The air and hydraulic fluid can be guided from the bottom to the top, for example, if the guide channels 10, 12 are offset by 180 ° along the circumference of the sleeve 8. This can be achieved in manufacture simply by the guide channels 10, 12 having a spiral shape along the extension of the sleeve 8. Such a housing 2 can then also be mounted rotated through 180 °. Such a position independence is important, for example, in alternative installations on the hinge side or the hinge opposite side of the door or in alternative installations on the door leaf or on the door frame.

Fig. 4 schematically shows the configuration of the labyrinth 13 arranged through the through-opening 7 and shows the plug 6 which opens in the event of a fire in the case of a pressure increase in the housing 2 and the level of the hydraulic liquid. If the pressure in the housing 2 rises and the level of hydraulic fluid in the through-opening 7 therefore rises further, air or hydraulic fluid can escape via the guide channels 10, 12. As long as the labyrinth 13 is designed symmetrically, it can also be used in a position of the drive rotated by 180 °, so that the drive is suitable for many installation situations.

As fig. 1 also shows, the hydraulic chamber 3 is filled with hydraulic fluid through the separately embodied chamber 14 and the subsequent channels 15, 16, and the separately embodied chamber 14, which contains no hydraulic fluid but air by the cocking drive, is then closed. This defined air volume can then be mixed with the hydraulic fluid, whereby the function in the hydraulic chamber 3 can be improved. The individual chambers 14 can also be designed as an assembly-able part of the housing 2.

List of reference numerals

1 drive device

2 casing

3 hydraulic chamber

4 spring

5 pressure balance chamber

6 plug

7 through hole

8 sleeve

9 annular seal

10 guide channel

11 annular channel

12 guide channel

13 labyrinth structure

14 separate chambers

15 channel

16 channels

Claims (12)

1. Housing (2) for a drive device (1) for a door or window, having a hydraulic chamber (3) filled with hydraulic fluid and having a pressure compensation chamber (5) which is separated from the hydraulic chamber (3) filled with hydraulic fluid by a pressure-and/or temperature-dependent plug (6), characterized in that the plug (6) is arranged in a through-opening (7) in a sleeve (8) which can be inserted into the housing (2), and at least one additional guide channel (10, 12) is arranged along the sleeve (8), through which hydraulic fluid and/or air can freely pass.

2. Housing according to claim 1, characterized in that the at least one additional guide channel (10, 12) opens as a groove into the sleeve (8) along its extension.

3. Housing according to claim 1, characterized in that the at least one additional guide channel (10, 12) opens into the housing (2) or into a housing insert along the extension of the sleeve (8).

4. Housing according to one of claims 1 to 3, characterized in that at least two guide channels (10, 12) are provided, which are arranged offset from one another in the circumferential direction along the extension length of the sleeve (8).

5. Housing according to claim 4, characterized in that the two guide channels (10, 12) are arranged offset by 180 ° from one another.

6. Housing according to one of claims 1 to 3, characterized in that the guide channel (10, 12) extends as a spiral along the extension of the sleeve (8).

7. Housing according to one of claims 1 to 3, characterized in that the guide channel (10, 12) opens into an annular channel (11) on the sleeve (8).

8. Housing according to one of claims 1 to 3, characterized in that at least one guide channel (10, 12) leads out of the housing (2).

9. Housing according to one of claims 1 to 3, characterized in that at least two guide channels (10, 12) form a labyrinth (13) in the housing, one of which comprises an upward discharge and the other comprises a downward discharge when the housing (2) is assembled.

10. The housing according to claim 9, characterized in that the labyrinth (13) is constructed symmetrically.

11. Housing according to claim 1, characterized in that a separately formed chamber (14) which is filled with a defined air volume after filling with hydraulic fluid is provided in the housing (2) and is connected to the hydraulic chamber (3).

12. A housing according to claim 11, characterized in that an attachment for filling the housing (2) with hydraulic liquid is provided at the inner end of the additional chamber (14), and that the additional chamber (14) can be closed outwards at the opposite end after filling.