DE102020108623A1 - Closing device for closing a door or window sash - Google Patents

Abstract

A closing device (10) for closing a door or window sash, with a spring piston (16) loaded by a spring (14) for applying a closing force to a closer shaft (18) and a damping piston (22) for damping the movement of the closer shaft (18) ), is designed and developed in such a way that the damping piston (22) and / or the spring piston (16) each have a piston body (32, 34), with the piston body (32, 34) a pot-shaped recess (36, 38) is formed at the end, into which an insert (40) with a roller (42) for engagement with the closer shaft (18) is inserted, the roller (42) by means of an axis (44) is rotatably mounted on the insert (40).

Description

The invention relates to a locking device for closing a door or window sash with the features of the preamble of claim 1.

Conventional locking devices for closing a door or a window sash are known from the prior art, for example from DE 198 57 267 C1 or off DE 102 59 237 A1 . This enables the corresponding wing to be operated. However, these locking devices consist of a large number of individual components, most of which are produced by machining. The manufacturing effort and the manufacturing costs are therefore comparatively high.

A locking device of the type mentioned is from WO 2019/076746 A1 known. It is proposed therein to make the damping piston from plastic and to make the spring piston from a non-ferrous metal alloy, with foot sections being formed on the spring piston which bridge the closer shaft and rest on the damping piston in foot receiving sections. Both pistons have no inserts. A roller, which is in contact with the closer shaft, is rotatably mounted on the damping piston and on the spring piston. It has been found that the forces acting from the roller on the bearing surfaces of the damping piston in particular can lead to fatigue and erosion of the piston material and to a reduced service life. In addition, the power transmission by means of the foot sections requires adherence to narrow tolerances in order to avoid damage to the foot sections. Therefore there is a need for optimization.

The invention is based on the object of providing a reliable and long-lasting locking device with simple structural means. It is desirable to reduce the manufacturing effort and the manufacturing cost.

The invention solves this problem by a locking device with the features of claim 1. According to this, the locking device is characterized in that the damping piston and / or the spring piston (each) have / has a piston body, a cup-shaped recess being formed on the front side of the piston body, in which an insert with a roller for engagement with the closer shaft (suitable) is inserted, wherein the roller is rotatably mounted on the insert by means of an axle (roller bolt).

The damping piston or the spring piston is thus formed essentially in two parts, namely from the piston body and the insert. The insert distributes the forces emanating from the roller over a comparatively large piston surface (surface section of the piston body) and counteracts material fatigue and material erosion. Conventional bearing bushings for roller pins do not achieve sufficient force distribution on the piston surface. This contributes to a reliable design of a locking device, the large-area force distribution allowing the use of materials that are easier to process, such as zinc, brass or plastic.

The recess is formed on the end face of the piston body which (in the installed state of the piston) faces the closer shaft. The axial ends are meant by the end faces of the piston body.

As already explained above, the recess in the piston body is cup-shaped, i.e. limited to the inside of the piston body (blind hole). The recess can have a cylindrical, for example annular disk-shaped, shape (interior) which is delimited laterally (for example radially) to the outside by a wall of the piston body.

The axle (piston pin) can optionally be secured against axial displacement relative to the insert with one or more washers or locking rings. In the assembled state, the roller protrudes in sections from the insert and the piston.

The locking device can have a housing in which the components of the locking device are arranged. The locking device can be a door closer for closing a door or window sash. The door or window sash can be displaced, in particular pivoted, from a fully or partially open position into the closed position by means of the door closer.

In the context of a preferred embodiment, the insert can be made of a non-uniform material to the piston body. The insert therefore consists of a different material than the piston body. The insert can be designed as a separate component from the piston body.

Appropriately, the piston body and the insert can be designed in such a way that the ratio between the bearing surface of the axle (roller bolt) on the insert (roller bolt bearing surface) and the cross-sectional area of the recess on the piston body (area on the piston body that can be used by the insert) is between 1: 5 and 1 : 10, in particular 1: 7. In this way, the force is distributed over a sufficiently large area so that fatigue and erosion can largely be avoided. With the bearing surface of the axis, the effective bearing surface of the axis is im Insert part meant, ie the area effective in the direction of force action between the sections of the axle, which rests in corresponding bearing sections (inner circumferential surface of the openings) of the insert part.

In an advantageous manner, the insert, the roller and the axle can form a preassembled structural unit which, in the preassembled state, can be inserted into the recess of the piston body. This contributes to simple assembly and high stability. If disks or retaining rings are provided for axially securing the axle, they can also form part of the preassembled structural unit.

In the context of a preferred embodiment, the insert part can have an outwardly protruding, at least partially circumferential, collar at one end with which the insert part, when inserted into the piston body (end face), rests against a wall of the piston body which laterally delimits the recess outwards . The collar specifies a defined insertion depth for the insert. In addition, the risk of incorrect assembly is significantly reduced. The collar can increase the contact area between the insert and the piston body.

Advantageously, the insert can have a pocket (roller receiving pocket), preferably formed centrally in the insert, in which the roller is arranged (in the assembled state), with walls of the insert surrounding the pocket laterally outwards (circumferentially). As a result, the insert surrounds the roller in a ring shape. This contributes to a safe and stable arrangement. In addition, an even load on the insert is achieved. In the wall of the insert (insert wall), the axle (roller bolt) can be rotatably mounted (openings in the wall for axle or roller bolt).

The wall of the piston body, which delimits the recess laterally outward, can expediently be designed in such a way that when the insert is inserted, the wall at least partially covers the openings in the insert in which the axis (roller bolt) is arranged. In this way, a structurally simple and reliable securing of the axis can be achieved. A sliding out of the axis is prevented. An additional securing element can be dispensed with. In the area where the opening for the axle is located, a preferably arcuate recess can be formed on the wall of the piston body. A saving in material can thus be achieved. Access for a fluid, for example hydraulic oil, is created.

In an advantageous manner, an axial passage can be formed in the piston body, in which an overload valve, a check valve and / or a combined overload / check valve (combination valve) are arranged. A flow control of the fluid, for example hydraulic oil, can thus be achieved. Safety functions (overload) can also be implemented. The passage can extend from an axial end of the piston body, which faces away from the recess for the insert, to the recess for the insert. At the end facing away from the recess, the passage can have a radially widened section.

Specifically, the piston body can have a jacket surface on which a circumferential groove is formed, in which a slide ring and / or a sealing ring (for example an O-ring) is arranged. This enables a seal between the piston (piston body) and the raceway formed in the housing of the closing device.

As an alternative or in addition, the piston body can have a jacket surface on which a lip sealing ring running around in the circumferential direction is formed, in particular is molded on. This contributes to a structurally favorable design with fewer components.

In an expedient manner, the piston body can be designed as an injection-molded part made of plastic, in particular made of thermoplastic plastic, for example from POM (polyoxymethylene). This contributes to simple and inexpensive manufacture. Machining (e.g. turning and milling) can be largely dispensed with.

In the context of a preferred embodiment, the insert part can be designed as a metallic die-cast part, in particular as a zinc die-cast or brass die-cast. This also contributes to simple and inexpensive manufacture.

In an expedient manner, the insert and / or the piston body can be designed free of support elements (feet) for bridging the closer shaft (support element-free configuration). This favors production and assembly, since the comparatively sensitive support elements are not required.

Advantageously, the insert part of the damping piston and the insert part of the spring piston can be identical. The insert is thus designed in such a way that it can be used for spring pistons and damping pistons. This contributes to universal application and to cost savings. The insert of the spring piston and the damping piston can be used to adapt to the closer shaft (contour of the cam disk) have different formed rollers, for example. A roller with a continuous contour (constant cross section) or a roller which has spaced apart and in the radial direction (with respect to a base section) protruding roller sections.

The spring piston and / or the damping piston can expediently be designed in such a way that the insert is encapsulated by the piston body. This favors assembly, since the insert is placed in a tool and encapsulated by the piston body. Insertion therefore takes place directly during the shaping of the piston body, so that the assembly effort is reduced.

• 1 eine Ausführungsform einer Schließvorrichtung in einer Seitenansicht und zwei Schnittansichten;
• 2a-c den Federkolben der Schließvorrichtung aus 1 in einer perspektivischen Ansicht (2a), einer Seitenansicht (2b) und einer geschnittenen Ansicht (2c) entlang einer in 2b eingezeichneten Schnittachse A-A;
• 3a-c den Dämpfungskolben der Schließvorrichtung aus 1 in einer perspektivischen Ansicht (3a), einer Seitenansicht (3b) und einer geschnittenen Ansicht (3c) entlang einer in 3b eingezeichneten Schnittachse C-C; und
• 4 das Einsatzteil des Federkolbens bzw. des Dämpferkolbens der Schließvorrichtung aus 1 in einer perspektivischen Vorderansicht (4a), einer perspektivischen Rückansicht (4b), einem Querschnitt (4c) entlang einer in 4b eingezeichneten Schnittachse D-D und einen Längsschnitt (4d) entlang einer in 4c eingezeichneten Schnittachse E-E.

The invention is explained in more detail below with reference to the figures, with identical or functionally identical elements being provided with identical reference numerals, but possibly only once. Show it:

• 1 an embodiment of a locking device in a side view and two sectional views;
• 2a-c the spring piston of the locking device 1 in a perspective view ( 2a) , a side view ( 2 B) and a cut view ( 2c ) along an in 2 B section axis AA drawn in;
• 3a-c the damping piston of the locking device 1 in a perspective view ( 3a) , a side view ( 3b) and a cut view ( 3c ) along an in 3b the drawn section axis CC; and
• 4th the insert part of the spring piston or the damper piston of the locking device 1 in a perspective front view ( 4a) , a perspective rear view ( 4b) , a cross section ( 4c ) along an in 4b the drawn section axis DD and a longitudinal section ( 4d ) along an in 4c section axis EE.

1 shows a locking device, generally designated by the reference number 10 is designated. At the locking device 10 it is a door closer for closing a door or window sash.

The locking device 10 has a housing 12th on, in which the components of the locking device 10 are arranged. The locking device 10 has one with a feather 14th loaded spring piston 16 on, which exerts a closing force on the closer shaft 18th via the cam 19th exercises. The closer shaft 18th points out of the housing 12th protruding connection sections 20th that can be connected to a linkage to drive the door or window sash (not shown). The closer shaft 18th is rotatable in the housing 12th the locking device 10 stored.

The locking device 10 also has a separate damping piston 22nd to dampen the movement of the closer shaft 18th on. The damping piston 22nd ensures that the closer shaft 18th when applied by a spring 14th and spring piston 16 does not rotate suddenly, but at a reduced speed, so that the door or window sash is driven at a defined, possibly constant, speed.

On that of the closer shaft 18th remote side of the spring piston 16 If the backcheck function is implemented (door or window sash is attenuated during the opening movement), this is a pressure space 24 educated. The closer shaft 18th is located between the spring piston 16 and damping piston 22nd in a pressure-free space 26th (Tank room). On that of the closer shaft 18th remote side of the damping piston 22nd there is a pressure room 28 , the rotation of the closer shaft during a closing movement 18th dampens. The case 12th the locking device 10 is at the end by locking pieces 30th locked.

In the example, the spring piston 16 a piston body 32 on, on the front side a pot-shaped recess 36 is trained (cf. 2c ). In the recess 36 is an insert 40 with a role 42 for engagement with the closer shaft 18th used appropriately. The role 42 is by means of an axis 44 (Roller bolt 44 ) rotatable on the insert 40 stored. Washers or retaining rings can be used as an option 41 for axially securing the axis 44 be provided (cf. 2c ).

The damping piston 22nd has a piston body 34 on, on the front side a pot-shaped recess 38 is trained (cf. 3c ). In the recess 38 is also an insert 40 with a role 42 ' for engagement with the closer shaft 18th used appropriately. The role 42 is by means of an axis 44 (Roller bolt 44 ) rotatable on the insert 40 stored. Washers or retaining rings can be used as an option 41 for axially securing the axis 44 be provided (cf. 3c ). The role 42 ' of the damping piston 22nd points to adaptation to the closer shaft 18th two axially spaced apart and radially protruding roller sections 43 on.

The insert 40 is not the same material as the piston body 32 , 34 formed (different material than the piston body). In the example are the piston body 32 , 34 and the insert 40 designed such that the ratio between the bearing surface of the axis 44 on the insert 40 to the cross-sectional area of the recess 36 , 38 at the Piston body 32 , 34 is between 1: 5 and 1:10, in particular 1: 7.

The insert 40 , the role 42 , 42 ' and the axis 44 form a pre-assembled unit in the example 46 , which in the pre-assembled state in the recess 36 , 38 of the piston body 32 , 34 of spring piston 16 or damping piston 22nd can be used (cf. 2c and 3c ). If available, the washers or retaining rings can also be used 41 Part of the unit 46 form.

The insert 40 points at one end 48 an outwardly protruding, preferably circumferential, collar 50 on (cf. 4a-d ) with which the insert 40 im in the piston body 32 , 34 used state on the front side on a wall 52 , 54 of the piston body 32 , 34 that is the recess 36 , 38 each laterally limited to the outside (cf. 2 B and 3b) .

The insert 40 has a preferably centered in the insert 40 trained pocket 56 (Roll pocket 56 ) on (cf. 4a-d ) in which the role 42 is arranged in the assembled state. Walls 58 of the insert 40 surround the bag 56 circumferentially to the side (cf. 2a and 3a) .

The wall 52 , 54 of the piston body 32 , 34 who have made the recess 36 , 38 laterally outwardly limited, is designed such that the wall 52 , 54 with inserted insert 40 in the insert 40 formed openings 60 , 62 (see. 4a, b ) in which the axis 44 is arranged, at least partially covered (cf. 2 B and 3b) . In the area where the opening is 60 , 62 for the axis 44 can be on the wall 52 , 54 of the piston body 32 , 34 optionally a preferably arched recess 84 , 86 be trained (cf. 2 B and 3b) .

In the piston body 32 of the spring piston 16 is an axial passage 64 formed, in which, for example. A combined overload and check valve 66 (Combi valve 66 ) is arranged (cf. 2c ). The passage 64 extends from that of the recess 36 remote end of the piston body 32 to the recess 36 for the insert 40 . In the piston body 34 of the damping piston 22nd is an axial passage 68 formed in which an overload valve 70 is arranged (cf. 3c ). The passage 68 extends from that of the recess 38 remote end of the piston body 34 to the recess 38 for the insert 40 . The damping piston 22nd may have a check valve (not shown).

The piston body 32 , 34 each have a lateral surface 72 , 74 on, on which a circumferential groove 76 , 78 is formed, in each of which a sliding ring 80 or a sealing ring 82 (e.g. an O-ring 82 ) are arranged (cf. 2c and 3c ). Alternatively, the piston body 32 , 34 a lateral surface 72 , 74 have, on which a circumferential lip sealing ring is formed, for example. Is molded on during manufacture (not shown).

The piston body 32 , 34 are each designed as an injection-molded part made of plastic, in particular made of thermoplastic plastic, for example from POM (polyoxymethylene).

The insert 40 is designed as a metallic die-cast part, in particular as zinc die-cast or brass die-cast. The insert 40 is free of support elements (feet) to bridge the closer shaft 18th formed (support element-free configuration).

The insert 40 of the damping piston 22nd and the insert 40 of the spring piston 16 are designed identically in the example. The role 42 , 42 ' can be attached to the closer shaft 18th be adjusted as explained above.

The spring piston 16 and / or the damping piston 22nd can be designed in such a way that the insert 40 through the piston body 32 , 34 is overmolded.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 19857267 C1 [0002]
• DE 10259237 A1 [0002]
• WO 2019/076746 A1 [0003]

Claims (11)

Closing device (10) for closing a door or window sash, with a spring piston (16) loaded by a spring (14) for applying a closing force to a closer shaft (18) and a damping piston (22) for damping the movement of the closer shaft (18) , characterized in that the damping piston (22) and / or the spring piston (16) has a piston body (32, 34), a cup-shaped recess (36, 38) being formed on the end face of the piston body (32, 34) into which a Insert part (40) with a roller (42) is used for engagement with the closer shaft (18), the roller (42) being rotatably mounted on the insert part (40) by means of an axis (44). Closing device (10) after Claim 1 , characterized in that the insert (40) is made of a non-uniform material to the piston body (32, 34) and / or that the piston body (32, 34) and the insert (40) are designed such that the ratio between the bearing surface of the axis (44) on the insert (40) to the cross-sectional area of the recess (36, 38) on the piston body (32, 34) is between 1: 5 and 1:10, in particular 1: 7. Closing device (10) after Claim 1 or 2 , characterized in that the insert (40), the roller (42) and the axle (44) form a preassembled structural unit (46) which can be inserted into the recess (36, 38) of the piston body (32, 34) in the preassembled state is. Locking device (10) according to one of the preceding claims, characterized in that the insert (40) has at one end (48) an outwardly protruding, at least partially circumferential, collar (50) with which the insert (40) in the Piston body (32, 34) inserted state on a wall (52, 54) of the piston body (32, 34) which delimits the recess (36, 38) laterally to the outside and / or that the insert (40) a preferably centrally in Insert (40) has formed pocket (56) in which the roller (42) is arranged, with walls (58) of the insert (40) surrounding the pocket (56) laterally outward. Closing device (10) according to one of the preceding claims, characterized in that the wall (52, 54) of the piston body (32, 34), which delimits the recess (36, 38) laterally outward, is designed in such a way that the wall ( 52, 54) when the insert (40) is inserted, openings (60, 62) which are formed in the insert (40) and in which the axis (44) is arranged are at least partially covered. Closing device (10) according to one of the preceding claims, characterized in that an axial passage (64, 68) is formed in the piston body (32, 34) in which an overload valve (70), a check valve and / or a combined overload / Check valve (66) is arranged. Closing device (10) according to one of the preceding claims, characterized in that the piston body (32, 34) has a lateral surface (72, 74) on which has a circumferential groove (76, 78) in which a sliding ring (80 ) and / or a sealing ring (82) is arranged and / or that the piston body (32, 34) has a lateral surface (72, 74) on which a circumferential lip sealing ring is formed, in particular molded on. Closing device (10) according to one of the preceding claims, characterized in that the piston body (32, 34) is designed as an injection-molded part made of plastic, in particular made of thermoplastic, for example POM (polyoxymethylene). Locking device (10) according to one of the preceding claims, characterized in that the insert (40) is designed as a metal die-cast part, in particular as zinc die-cast or brass die-cast and / or that the insert (40) is designed free of support elements for bridging the closer shaft (18) is. Closing device (10) according to one of the preceding claims, characterized in that the insert part (40) of the damping piston (22) and of the spring piston (16) are identical. Closing device (10) according to one of the preceding claims, characterized in that the insert part (40) is overmolded by the piston body (32, 34).

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