EP2738334A2 - Door closer - Google Patents

Abstract

The door actuator comprises a housing (2) and a driven shaft (3) mounted in the housing in a rotationally movable manner for actuating a door leaf. A piston (5) is linearly guided in the housing and is operatively connected with the driven shaft. The piston comprises a bearing scaffold and a tubular cladding component enclosing the scaffold. An outer surface of the cladding component is guided to an inner surface of the housing.

Description

The present invention relates to a door operator for opening and / or closing a door leaf.

The prior art knows various types of door operators, in particular door closers, power door closers or door drives. The door operator is attached either directly to the door leaf or to the wall or frame. If the door operator is on the wall or frame, an output shaft of the door operator is connected to the door leaf via a linkage. If the door operator is located directly on the door leaf, the linkage connects the output shaft with a slide rail on the wall or frame. Within the door operator, the rotational movement of the output shaft is converted by means of pistons into a linear movement for tensioning a closing spring. In conventional arrangements, the linearly guided pistons are integral rotary milled parts.

It is an object of the present invention to provide a door operator who works reliable and low maintenance at low cost production and assembly.

The object is achieved by the features of claim 1. The dependent claims have preferred developments of the invention the subject.

Thus, the object is achieved by a door operator comprising a housing and a rotatably mounted in the housing output shaft. The door leaf is actuated via the output shaft. Is the door operator For example, on the door leaf, the force is transmitted to the frame or a wall via the output shaft and a linkage. If the door operator is on the wall or the frame, the force is transmitted to the door leaf via the output shaft and a corresponding linkage. In a third alternative, the output shaft can be arranged coaxially to the axis of rotation of the door. It requires no linkage for power transmission. The door operator according to the invention further comprises at least one piston guided linearly in the housing. This piston cooperates with the output shaft, so that a rotational movement of the output shaft can be converted into a linear movement of the piston, and vice versa. The piston is constructed in several parts and thus comprises a supporting framework and at least one tubular, the framework enveloping shell component. The multi-part construction of the piston allows a very simple and lightweight piston design. The jacket component is preferably fastened to the framework by form-fitting insertion and / or pressing and / or shrinking. Furthermore, it is preferably provided to loosely assemble the individual components of the piston and to achieve a firm cohesion by pressing the piston into the housing. Furthermore, the individual components, in particular the supporting framework and the enveloping jacket component, can be connected to one another by welding and / or gluing and / or extrusion coating.

Preferably, an outer surface of the shell component is designed for guidance on an inner surface of the housing. For this purpose, the outer surface of the jacket component is in particular cylindrical.

In the framework of the piston, a pressure roller is preferably rotatably mounted. The supporting framework preferably has a U-shaped roller carrier. This roller carrier comprises two opposite legs. On the legs of the pressure roller is mounted. For this purpose, a bolt is preferably provided. The two ends of the bolt are stuck in the legs of the U-shaped roller carrier. On the bolt, the pressure roller, for example, with needle-shaped rolling elements, rotatably mounted. The U-shaped roller carrier is in particular formed in one piece, for example as a bent sheet metal part.

On the output shaft of the door operator, a cam disc is preferably arranged. The pressure roller arranged in the piston rolls on the cam disk. Due to the contour of the cam disk, the piston is moved linearly during a rotation of the output shaft.

Furthermore, the framework preferably comprises a cross-shaped support beam. The support beam is preferably composed of two mutually perpendicular support plates. The two carrier plates are preferably inserted into one another in a form-fitting manner. The cross-shaped support bracket supports the shell component inside the piston. Thereby, the jacket member can be relatively easily formed and serves primarily only as a guide surface of the piston in the housing.

The framework preferably comprises a first disc. This first disc forms a first end face of the piston. The jacket component is preferably located on a cylindrical outer surface of the first disc.

Furthermore, the framework preferably comprises a second disc. This second disc is opposite the first disc and thus forms the second end face of the piston. The first and / or the second disc are preferably on the support bracket. In particular, it is provided that the first disc and / or the second disc are connected to the support carrier.

The first and / or the second disc have the cylindrical outer surface on which the jacket component rests or is attached. It is preferably provided that pins are formed on the cylindrical outer surface. To the pins complementary grooves are formed in the shell component. The pins stuck in the grooves, so that the jacket member is connected against rotation with the first and / or the second disc.

In a simple embodiment, the shell component is a simple tube. Alternatively, it is possible to manufacture the shell component by a deep drawing process. The thermoforming component has a bottom. This bottom forms, instead of the second disc, the second end face of the piston. The floor does not have to extend over the complete second end face, but may have a central recess. The decisive factor is that the floor represents a bearing surface for the framework.

Furthermore, it is preferably provided that the jacket component comprises two individual, tubular parts. The two individual, tubular parts are spaced from each other mounted on the frame, so that an annular groove is formed between the two parts.

The tubular shell component is designed in particular thin-walled. The wall thickness of the jacket component is preferably between 1 mm and 10 mm, more preferably between 2 mm and 8 mm.

The jacket component and the framework have an internal cavity. To improve the stability of the piston, a volume body is preferably inserted into the cavity. The solid is in particular cylindrical.

Furthermore, the cavity is preferably used as a hydraulic tank and / or hydraulic compensation chamber. This use of the cavity is independent of the volume used, since despite the volume body a corresponding cavity can remain. Especially for small door operators, it makes sense to use the cavity as a tank or compensation chamber for hydraulic oil. This increases the system security, since due to sufficient tank or compensating volume, for example, with different oil fillings and temperature differences, a burst in the door operator is avoided. In particular, it is provided that at least one hydraulic line leads into the cavity.

In particular, the door operator has two pistons guided linearly in the housing. In this case, only one of the two pistons or both pistons can be configured according to the present invention. The one piston is used as a "damping piston" and displaces an oil volume to dampen the movement of the door leaf. The second piston is used as a "closing piston" and cooperates with an energy store, in particular a spring. Both pistons have a pressure roller that rolls on the cam. The cam disk is located between the two pistons and thus between the two pressure rollers. The two pistons are connected to each other via at least one connecting element. This connecting element is preferably designed as one or more rods. The rods extend beside or below or above the cam disc between the two pistons. The at least one connecting element is preferably formed integrally with the U-shaped roller carrier of one of the two pistons. In particular, it is provided that the at least one connecting element is formed as an integral extension of a leg of the roller carrier.

Figur 1

einen erfindungsgemäßen Türbetätiger gemäß allen Ausführungsbeispielen,

Figur 2

einen Kolben des erfindungsgemäßen Türbetätigers gemäß einem ersten Ausführungsbeispiel,

Figur 3

ein erstes Detail zu Figur 2,

Figur 4

ein zweites Detail zu Figur 2,

Figur 5

ein drittes Detail zu Figur 2,

Figur 6

einen Kolben des erfindungsgemäßen Türbetätigers gemäß einem zweiten Ausführungsbeispiel,

Figur 7

ein Detail zu Figur 6,

Figur 8

einen Kolben des erfindungsgemäßen Türbetätigers gemäß einem dritten Ausführungsbeispiel,

Figur 9

ein Detail zu Figur 8,

Figur 10

einen Kolben des erfindungsgemäßen Türbetätigers gemäß einem vierten Ausführungsbeispiel, und

Figur 11

ein Detail zu Figur 10.

The invention will now be described in more detail by means of exemplary embodiments. Showing:

FIG. 1

a door actuator according to the invention according to all embodiments,

FIG. 2

a piston of the door actuator according to the invention according to a first embodiment,

FIG. 3

a first detail too FIG. 2 .

FIG. 4

a second detail too FIG. 2 .

FIG. 5

a third detail too FIG. 2 .

FIG. 6

a piston of the door actuator according to the invention according to a second embodiment,

FIG. 7

a detail too FIG. 6 .

FIG. 8

a piston of the door actuator according to the invention according to a third embodiment,

FIG. 9

a detail too FIG. 8 .

FIG. 10

a piston of the door operator according to the invention according to a fourth embodiment, and

FIG. 11

a detail too FIG. 10 ,

Fig. 1 shows the structure of a door operator 1 for all embodiments.

According to Fig. 1 the door operator 1 has a housing 2. In the housing 2, an output shaft 3 is rotatably mounted. The output shaft 3 is connected, for example via a linkage, with the door leaf. On the output shaft 3 is a cam disk 4th

On one side of the cam disk 4, a first piston 5 is arranged, on the other side of the cam disk 4, a second piston 6 is arranged. The two pistons 5, 6 are guided in the housing 2 linearly movable. In each piston 5, 6 each have a pressure roller 7 is arranged. The pressure rollers 7 are rotatably mounted on bolts 13. The bolts 13 are rotatably received in the piston 5, 6.

Between a front side of the housing 2 and the first piston 5 is a damping chamber 8. This damping chamber 8 is filled with hydraulic oil. During a movement of the first piston 5, the hydraulic oil is displaced in the damping chamber 8, so that a damping of the movement of the door leaf is achieved.

The second piston 6 is operatively connected via a freewheel assembly 9 with a closing spring 10. Instead of the freewheel assembly 9, the closing spring 10 could also rest directly on the second piston 6.

Present door operator 1 is designed as a door closer. In a manual movement of the door leaf, the output shaft 3 and thus the cam plate 4 is set in rotation. The two pressure rollers 7 rest on the cam disk 4, so that the two pistons 5, 6 are moved by a rotation of the cam disk 4. In a manual opening movement of the door leaf, the two pistons 5, 6 are moved to the right, so that the closing spring 10 is tensioned. During a closing operation of the door leaf, the closing spring 10 relaxes and moves the pistons 5, 6 to the left. This leads to an opposite rotation of the cam disc 4 and output shaft 3 and consequently to a closing movement of the door leaf.

In the following, the detailed structure of the first piston 5 will be described with reference to several embodiments. The second piston 6 can be constructed analogously to the first piston 5.

Identical or functionally identical components are provided with the same reference numerals in all embodiments.

FIG. 2 shows the piston 5 according to the first embodiment. The piston 5 is composed of a supporting frame 11 and a shell member 11 placed on the frame 11. In the frame 11, the pressure roller 7 is rotatably mounted on the bolt 13. As an integral part of the framework 11, two connecting elements 15 are formed. By means of these connecting elements 15, the first piston 5 can be connected to the second piston 6.

In FIG. 3 the jacket component 12 is hidden. In FIG. 4 Furthermore, the pressure roller 7 and the bolt 13 are hidden. FIG. 5 shows only a cross-shaped support beam 21 of the frame 11 in an exploded view.

The jacket component 12 has a cylindrical outer surface 14. With this outer surface 14 of the piston 5 is guided in the housing 2 linearly movable. On the frame 11 a plurality of pins 17 are formed. In the jacket component 12 grooves 16 are provided. The pins 17 stuck in the grooves 16, so that a rotationally fixed connection between the jacket member 12 and the frame 11 is formed.

The FIGS. 3 to 5 show the structure of the frame 11 in detail. The frame 11 is composed of a U-shaped roller carrier 18. The U-shaped roller carrier 18 has two opposite legs 19. The two legs 19 are connected by a rear wall 20 with each other. Integral part of a leg 19 are the two connecting elements 15. The U-shaped roller carrier 18 with the two legs 19, the rear wall 20 and the connecting elements 15 is integrally, for example, as a stamped and bent part manufactured.

In the legs 19 each have a bolt receptacle 24, designed as a through hole, provide. The bolt 13 is inserted in these two bolt receptacles 24. Furthermore, the rear wall 20 has retaining grooves 25. With these retaining grooves 25, the U-shaped roller carrier 18 is inserted in the cross-shaped support beam 21st

Furthermore, the frame 11 comprises two opposite discs 22, 23. The two discs 22, 23 form the two end faces of the piston 5. On each of the discs 22, 23 a cylindrical receiving surface 30 is formed. On this cylindrical receiving surface 30, the jacket member 12 is inserted. Furthermore, the pins 17 are arranged on this receiving surface 30.

The first disc 22 has a recess in which the two legs 19 and the pressure roller 7 stuck. The pressure roller 7 thus protrudes through the first disc 22, so that one half of the pressure roller 7 is arranged in the interior of the first piston 5. The other half of the pressure roller 7 protrudes from the first piston 5, and thus can roll on the cam plate 4.

The two discs 22, 23 abut the cross-shaped support beam 21, and are in particular firmly connected to the cross-shaped support beam 21.

FIG. 5 shows in an exploded view, a first support plate 26 and a second support plate 27. These two support plates 26, 27 together form the cross-shaped support bracket 21. In the support plates 26, 27 Formschlussnuten 28 are formed. These two form-fitting grooves 28 are inserted into one another, so that the two support plates 26, 27 are fixed at an angle of 90 ° to each other. Furthermore, the second carrier plate 27 has a roller carrier recess 29. In this roller carrier recess 29 of the roller carrier 18 sits.

The FIGS. 6 and 7 show the first piston 5 according to the second embodiment. In FIG. 7 the jacket component 12 is hidden.

In the second embodiment, the second disc 23 is formed as a rotating part. The second disk 23 here likewise has a cylindrical receiving surface 30 for the jacket component 12. However, there are no pins 17 on this cylindrical receiving surface 30.

The FIGS. 8 and 9 show the piston 5 according to a third embodiment. In FIG. 9 only the shell component 12 is shown. In the third exemplary embodiment, the jacket component 12 is a deep-drawn component. This thermoforming component has a bottom 31 and is thus cup-shaped. In the third embodiment, the second disc 23 is omitted and by replaced the floor 31. Furthermore, in the third embodiment, the pins 17 on the receiving surface 30 of the first disc 22 omitted.

The Figures 10 and 11 show the piston 5 according to a fourth embodiment. In FIG. 11 the jacket component 12 is hidden.

In the fourth embodiment, the jacket member 12 is formed in two parts and thus comprises two tubular parts 32, 33. The two tubular parts 32, 33 are spaced apart from each other onto the frame 11, so that between the two parts 32, 33, an annular groove 34 is formed. The annular groove 34 is provided for the meaningful accommodation of piston seals or piston lip rings and / or guide bands and / or piston rings.

In particular FIG. 11 shows, in the fourth embodiment, a volume body 35 is inserted between the shell member 12 and the frame 11. The volume body 35 is cylindrical and serves for further stabilization. The volume body 35 is used in particular for the realization of the annular groove 34, but can also be used in the other embodiments.

Regardless of the use of the volume body 35 is formed in the interior of the frame 11, a cavity which can be used for example as a hydraulic tank or hydraulic compensation room.

Reference number list

1

door actuators

2

casing

3

output shaft

4

cam

5

first piston

6

second piston

7

pressure roller

8th

damping space

9

Freewheel arrangement

10

closer spring

11

framework

12

cladding member

13

bolt

14

outer surface

15

connecting element

16

groove

17

spigot

18

U-shaped roller carrier

19

two thighs

20

rear wall

21

cross-shaped support beam

22

first disc

23

second disc

24

pin receptacles

25

retaining

26

first carrier plate

27

second carrier plate

28

interlocking grooves

29

Roller support recess

30

cylindrical receiving surface

31

ground

32

first tubular part

33

second tubular part

34

ring groove

35

solids

Claims (14)

Door operator (1), comprising a housing (2), - In the housing (2) rotatably mounted output shaft (3) for actuating a door leaf, and - At least one in the housing (2) linearly guided, with the output shaft (3) operatively connected piston (5), - Wherein the piston (5) comprises a supporting frame (11) and at least one tubular, the frame (11) enveloping, shell member (12). Door operator according to claim 1, characterized in that an outer surface (14) of the jacket component (12) is guided on an inner surface of the housing (2). Door operator according to one of the preceding claims, characterized in that in the supporting framework (11) a pressure roller (7) is mounted rotatably. Door operator according to claim 3, characterized in that on the output shaft (3) a cam disc (4) is arranged, wherein the pressure roller (7) on the cam disc (4) unrolls. Door operator according to claim 3 or 4, characterized in that the frame (11) comprises a U-shaped roller carrier (18), wherein the roller carrier (18) has two opposite legs (19), and wherein the pressure roller (7) to the opposite Legs (19) is stored. Door operator according to one of the preceding claims, characterized in that the framework (11) comprises a cross-shaped support beam (21), which is preferably composed of two mutually perpendicular support plates (26, 27). Door operator according to one of the preceding claims, characterized in that the frame (11) comprises a first disc (22) which forms a first end face of the piston (5), wherein the jacket member (12) on a cylindrical outer surface (30) of the first Disc (22) rests. Door operator according to claim 7, characterized in that a second end face of the piston (5) by a second disc (23) of the frame (11) is formed. Door operator according to one of claims 6 to 8, characterized in that the first disc (22) and / or the second disc (23) abut the cross-shaped support carrier (21). Door operator according to one of claims 1 to 7, characterized in that the jacket component (12) is designed as a deep-drawn component, wherein a bottom (31) of the deep-drawn component forms the second end face of the piston (5). Door operator according to one of the preceding claims, characterized in that the jacket component (12) comprises two individual, tubular parts (32, 33) which are spaced apart from each other onto the framework (11), so that between the two parts (32, 33) an annular groove (34) is formed. Door operator according to one of the preceding claims, characterized in that the jacket component (12) has a wall thickness of between 1 mm and 10 mm, preferably between 2 mm and 8 mm. Door operator according to one of the preceding claims, characterized in that a cavity in the frame (11) forms a hydraulic tank and / or a hydraulic compensation chamber of the door operator. Door operator according to one of the preceding claims, characterized by a further piston (6) which is linearly guided in the housing (2) and operatively connected to the output shaft (3), wherein the two pistons (5, 6) have at least one connecting element (15), preferably a rod , are fixedly connected to each other, and wherein the connecting element (15) is an integral part of the framework (11), preferably of the roller carrier (18), of a piston (5).

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