EP3238573B1 - Electric motor double drive - Google Patents

Description

The invention relates to an electric motor double drive for adjusting relative to each other pivotally supporting parts of a support means for supporting a box spring mattress or a cushion bed relative to each other.

Double drives are well known, for example for use with slatted frames. They have a base body, which may be formed in particular as a housing and are arranged on or in the two drive units, each having an output member which cooperates in the mounting position of the double drive with a pivot member in the form of a pivot shaft, with a support member to be adjusted for pivoting the same is in operative connection. The pivot shaft is part of a Verstellbeschlags that is part of a support to be adjusted, for example, a slatted base. The output member is formed in the known furniture drives usually by a linearly movable spindle nut. To implement the linear movement of the spindle nut in a pivoting movement of the pivot shaft, a pivot lever is rotatably mounted on the pivot shaft. To adjust a support member of the support means, the spindle nut presses against the articulation lever, so that the pivot shaft is pivoted and thereby the support member is adjusted in the desired manner.

By US 5 063 623 A is an electric motor double drive for an adjustable support means in the form of a slatted base having a frame and relative to each other schwenkverstellbare support members having at least one stationary central support member, with one end hinged and pivotable about a horizontal pivot axis, an upper body support member and the other end articulated and about a horizontal pivot axis pivotally connected to a leg support member, wherein the double drive has a base body on which two drive units are arranged, each drive unit is connected in the mounting position of the double drive with a pivot lever driving technology.

Actuators for adjustable parts of beds are also by US 2005/0251917 A1 . US 2014/0366267 A1 and WO 95/24880 A1 known.

The invention is based on the object to provide an electric motor double drive, in which the mounting on the support device is simplified.

This object is achieved by the invention defined in claim 1.

The invention provides a dual drive adapted for tool-less mounting on a support for a box spring mattress or an upholstered bed. In this way, the assembly of the double drive on the support means is simple and can be done quickly.

The invention provides fastening means for tool-free attachment of the central support member to the main body of the double drive, wherein the fastening means have a tool-free hand-operated screw device.

Appropriately, each pivot lever by means of an associated output member for pivoting the associated support member is pivotable, as provides an advantageous development.

In the aforementioned embodiment, it is advantageous if the output member is linearly movable. Corresponding linear actuators are available as relatively simple and cost-effective assemblies and are suitable for applying large forces.

A development of the aforementioned embodiment provides that the output member is a spindle nut which is arranged against rotation and movable in the axial direction on a stationary threaded spindle, which is in rotary drive connection with an electric motor of the drive unit, as provides an advantageous development.

In a kinematic reversal of the aforementioned embodiment, however, the output member may also be a threaded spindle which is mounted for rotation against rotation in its axial direction and on which a stationary spindle nut is arranged, which is in rotary drive connection with an electric motor of the drive unit.

Corresponding spindle drives are available as relatively simple and inexpensive standard modules and are suitable for applying large forces.

The main body of the double drive can be designed according to the respective requirements in a variety of ways. An advantageous development of the invention provides insofar as the main body of the double drive as a housing, preferably made of plastic, is formed. By the housing recorded components of the double drive are protected in the housing.

In order to simplify the production of the housing in the aforementioned embodiment, an advantageous development provides that the housing consists of two half-shells. The invention provides that support elements are formed at the ends of the base body, with which the base body rests in the mounting position of the double drive on transverse struts of the support means. In this way, the assembly is particularly simple in which is placed in a first assembly step, the main body on the struts.

In order to further simplify an attachment of the main body to the central support part of the support device, another advantageous development provides that fastening straps for screw fastening of the main body to the stationary central support part of the support device are integrally formed on the main body or formed on the main body.

An electromotive adjustable support device according to the invention for supporting a box spring mattress or a cushion bed is specified in claim 9. It has a double drive according to the invention.

The invention will be explained in more detail below with reference to the attached schematic drawing, in which exemplary embodiments of a double drive according to the invention and a support device according to the invention are shown. All the features described in the description, illustrated in the drawing and claimed in the claims taken alone and in any suitable combination with each other form the subject of the invention, regardless of their summary in the claims and their back references and regardless of their description or representation in the drawing.

Fig. 1

eine Perspektivansicht eines Ausführungsbeispiels einer erfindungsgemäßen elektromotorisch verstellbaren Stützeinrichtung zum Abstützen einer Boxspring-Matratze mit einem ersten Ausführungsbeispiel eines erfindungsgemäßen Möbelantriebs in Form eines Doppelantriebs, wobei die Stützeinrichtung in der Enlage der Verstellbewegung gezeigt ist, die einer maximal verstellten Position entspricht,

Fig. 2

in gleicher Darstellung wie Fig. 1 die Stützeinrichtung gemäß Fig. 1, wobei Stützteile der Stützeinrichtung weggelassen sind,

Fig. 3

in gleicher Darstellung wie Fig. 2 die Stützeinrichtung gemäß Fig. 2, wobei zusätzlich ein Rahmen der Stützeinrichtung weggelassen ist,

Fig. 4

in gegenüber Fig. 3 vergrößertem Maßstab eine Einzelheit aus Fig. 3,

Fig. 5

in gleicher Darstellung wie Fig. 3 die Stützeinrichtung gemäß Fig. 3, wobei der als Profilschiene ausgebildete Grundkörper des Möbelantriebs weggelassen ist,

Fig. 6

in vergrößertem Maßstab eine Einzelheit aus Fig.5,

Fig. 7

eine Perspektivansicht eines zweiten Ausführungsbeispiels eines erfindungsgemäßen Doppelantriebs, wobei Schwenkhebel des Doppelantriebs in einer Ausgangslage der Verstellbewegung dargestellt sind,

Fig. 8

in gleicher Darstellung wie Fig. 7 den Doppelantrieb gemäß Fig. 7, wobei die Schwenkhebel in der Endlage der Verstellbewegung dargestellt sind,

Fig. 9

in gleicher Darstellung wie Fig. 8 den Doppelantrieb gemäß Fig. 8, wobei eine Halbschale eines Gehäuses des Doppelantriebs weggelassen ist,

Fig. 10

in gleicher Darstellung wie Fig. 9, jedoch in vergrößertem Maßstab eine Einzelheit aus Fig. 9,

Fig. 11

in gleicher Darstellung wie Fig. 10 den Doppelantrieb gemäß Fig. 10, wobei aus Gründen der Veranschaulichung ein Druckstück einer Antriebseinheit des Doppelantriebs weggelassen ist,

Fig. 12:

in gleicher Darstellung wie Fig. 10 für sich genommen das Druckstück,

Fig. 13

in gleicher Darstellung wie Fig. 9 den Doppelantrieb in der in Fig. 7 dargestellten Ausgangslage der Verstellbewegung und

Fig. 14

in gleicher Darstellung wie Fig. 8, jedoch in vergrößertem Maßstab eine Einzelheit aus Fig. 8.

It shows:

Fig. 1

a perspective view of an embodiment of an electromotive adjustable support device according to the invention for supporting a box spring mattress with a first embodiment of a furniture drive according to the invention in the form of a double drive, wherein the support means is shown in the Enlage the adjustment, which corresponds to a maximally adjusted position,

Fig. 2

in the same representation as Fig. 1 the support device according to Fig. 1 wherein supporting parts of the support device have been omitted,

Fig. 3

in the same representation as Fig. 2 the support device according to Fig. 2 , wherein additionally a frame of the support device is omitted,

Fig. 4

in opposite Fig. 3 enlarged detail of a detail Fig. 3 .

Fig. 5

in the same representation as Fig. 3 the support device according to Fig. 3 in which the main body of the furniture drive formed as a profiled rail is omitted,

Fig. 6

on a larger scale a detail Figure 5 .

Fig. 7

a perspective view of a second embodiment of a double drive according to the invention, wherein pivot lever of the double drive in a starting position of the adjusting movement are shown,

Fig. 8

in the same representation as Fig. 7 the double drive according to Fig. 7 , wherein the pivot lever are shown in the end position of the adjusting movement,

Fig. 9

in the same representation as Fig. 8 the double drive according to Fig. 8 wherein a half shell of a housing of the double drive is omitted,

Fig. 10

in the same representation as Fig. 9 , but on a larger scale a detail Fig. 9 .

Fig. 11

in the same representation as Fig. 10 the double drive according to Fig. 10 in which, for the sake of illustration, a pressure piece of a drive unit of the double drive has been omitted,

Fig. 12:

in the same representation as Fig. 10 taken individually, the pressure piece,

Fig. 13

in the same representation as Fig. 9 the double drive in the in Fig. 7 illustrated initial position of the adjustment and

Fig. 14

in the same representation as Fig. 8 , but on a larger scale a detail Fig. 8 ,

To explain an embodiment of an electromotive adjustable support device according to the invention, with an embodiment of an electromotive Double drive is provided below on the Fig. 1 to 6 Referenced.

In Fig. 1 an embodiment of an electromotive adjustable support device 2 for supporting a box spring mattress is shown. The box spring mattress itself is not shown in the drawing to simplify the illustration.

The support device 2 has a frame 4 and relatively pivotable, plate-shaped support members having a stationary central support member 6, one end of which hinged and pivotable about a horizontal pivot axis, an upper body support member 8 is connected. With the upper body support member 8 facing away from the end of the central support member 6 is pivotally connected and pivotable about a horizontal pivot axis, a leg support member 10 to which a calf support member 12 is articulated.

In Fig. 2 are omitted for ease of illustration in the support members 6 to 12. In Fig. 3 In addition, the frame 4 of the support device 2 is omitted

The structure of an embodiment of a double drive 14 according to the invention will be explained below. The double drive 14 has a base body 16, which is formed in this embodiment as a C-profile rail. On the base body 16, two drive units 18, 18 'are arranged, wherein the drive unit 18 of the upper body support member 8 for adjusting the same and the drive unit 18' are assigned to the leg support member 10 and the calf support member 12 for adjusting the same. In the following, only the drive unit 18 will be explained in more detail. The drive unit 18 'is constructed accordingly and will therefore not be explained here.

The drive unit 18 has an electric motor 20 which is connected via a worm gear with a threaded spindle 22 in rotary drive connection, on the against rotation and in Axial direction of the threaded spindle 22 linearly movable a spindle nut 24 is arranged, which forms the output member of the drive unit 18. For pivoting the upper body support member 8 relative to the central support member 6, a pivot member is provided in the form of a pivot lever 26 which is pivotally mounted about a pivot axis 28 on the main body 16 of the double drive 14. The pivot axis 28 facing away from the end of the pivot lever 26 carries rollers 30, 30 'on which the upper body support member 8 is supported with its side facing away from the box spring mattress, so that the pivot lever 26, the upper body support member 8 applied loosely.

With the pivot lever 26 is spaced from the ends of one end of a raising lever 32 hingedly connected, the other end is acted upon by the spindle nut 24 loose. Starting from a starting position of the adjustment movement, which corresponds to a reclining position of the support device 2 and in which the upper body support member 8 spans a substantially horizontal support plane together with the central support member 6 and the leg support member 10 and the calf piece 12, the electric motor 20 drives the threaded spindle 22 in such a way in that the spindle nut 24 moves to the right in the drawing and presses against the facing end of the setting lever 32, whereby the set-up lever 32 sets up. As a result, the pivot lever 26 is pivoted in the drawing in a clockwise direction, so that the upper body support member is pivoted in the desired manner.

The provision from the end position of the adjusting movement to the starting position shown in the drawing takes place when the electric motor 20 is switched on, but under the weight force of the upper body support part 8 or a person resting on the support device 2.

How out Fig. 6 it can be seen, the pivot lever 26 facing on its spindle nut 24 and the set-up lever 32 Side extending in the longitudinal direction of the pivot lever 26 recess 34 which is formed so that in the initial position of the adjustment, in which the upper body support member 8 is arranged substantially horizontally, the spindle nut 24 and the setting lever 32 are received in the recess 34.

Characterized in that the pivot lever 26 is pivotally mounted on the main body 16 of the double drive 14, a separate Verstellbeschlag is unnecessary. In this way, a particularly simple structure.

According to the invention, the double drive 14 is designed for tool-free mounting on the support device 2. In the illustrated embodiment, the support means 2 transverse to its longitudinal direction extending struts 36, 36 '(see, in particular Fig. 2 and Fig. 3 ) on. At the ends of the rail, which forms the main body 16 of the double drive 14, support elements 38, 38 'are arranged, with which the base body 16 in the mounting position of the double drive 14 shown in the drawing on the struts 36, 36' is supported. According to the respective requirements, the support elements 38, 38 'can be fastened to the struts 36, 36' via suitable fastening means. In the illustrated embodiment, the support elements 38, 38 'but loose on the struts 36, 36' on. The distance between facing away from each other vertical surfaces of the support elements 38, 38 'corresponds substantially to the clear width between the cross braces 36, 36'. Possibly. can the double drive 14 in this case easily clamped between the cross braces 36, 36 'be held.

In the illustrated embodiment, fastening means for tool-free attachment of the central support member 6 are further provided on the base body 16 of the double drive 14, which in this embodiment according to the invention a tool-free have manually operable screwing. The screwing device has in the illustrated embodiment in the sense of a tool-free fastening thumbscrews, of which in Fig. 6 only a thumbscrew 42 can be seen. The thumbscrews can be screwed into nuts 40, 40 'arranged on the middle support part 6.

For disassembly of the double drive 14, for example, for maintenance purposes, it is only necessary to solve the wing screws 42, 42 'and the support elements 38, 38' of the struts 36, 36 'stand out. The assembly and disassembly of the double drive 14 are thus completely without tools and very easy to accomplish.

The leg support part 10 and the calf support part 12 associated pivot lever 26 'carries at its ends a parallel to the pivot axis of the pivot lever 26' extending axis 44 (see. Fig. 3 ), which is received in mounting position of the double drive 14 in receptacles 46, 46 ', which are fixed to the underside of the calf support part 12. In this way, the leg support part 10 and the calf support part 14 are adjusted during pivoting of the pivot lever 26.

Autonomous inventive significance also has a method for emergency lowering of an adjusted by means of a furniture drive according to the invention support member. Falls for example in the in Fig. 6 illustrated adjusting position of the pivot lever 26 and thus of the upper body support member 8 of the current, so the pivot lever 26 by hand in Fig. 6 be moved in a clockwise direction, so that the set-up lever 32 is disengaged from the spindle nut 24 and the pivot lever 26 is thus decoupled from the drive train of the drive unit 18. Subsequently, the pivot lever 26 can be moved counterclockwise in the drawing, wherein the upper body support member moves back to the starting position and the raising lever 32 via the spindle nut 24 in the drawing to slides left over. In the starting position of the adjustment movement reached again at the end of this movement, the set-up lever 32 and the spindle nut 24 are received in the recess 34 of the pivoting lever 26.

To bring the pivot lever 26 again in drive connection with the drive train of the drive unit 18, it is only necessary to control the electric motor 20 so that the spindle nut 24 moves in the drawing to the left back to its original position. In this case, it moves under the setting lever 32 so that it slides over the spindle nut 24 and again comes into engagement with the electric motor 20 facing the end of the spindle nut 24 and the drive connection is thus restored. To facilitate this process, the raising lever 32 may be provided at the bottom of its free end with a run-on slope 46, as seen from Fig. 6 evident.The emergency lowering is thus designed very simple.

To explain a second embodiment of a furniture drive according to the invention is hereinafter referred to the FIGS. 7 to 14 Referenced.

In Fig. 7 a second embodiment of a double drive 14 according to the invention is shown, are mounted on the base body 16 in accordance with the first embodiment, pivot elements in the form of pivoting levers 26, 26 each about a pivot axis 28, 28 'pivotally mounted. In further accordance with the first embodiment, the double drive 14 is designed for tool-less mounting on a support means for a box spring mattress or a cushion bed, as has been explained for the first embodiment. Fig. 7 shows the dual drive 14 in an initial position of the adjustment movement with a position of the pivot lever 26, 26, which corresponds to an adjustment position of the support means in which the support members span a substantially horizontal support plane.

Fig. 8 shows the double drive according to Fig. 7 in a position of the pivot lever 26, 26 ', which corresponds to an end position of the adjusting movement, in which the supporting parts are adjusted relative to each other maximum.

The second embodiment differs from the first embodiment initially in that the base body 16 is formed as a housing 50, in which the pivot levers 26, 26 'associated drive units are added. The housing 50 consists in the illustrated embodiment of two half-shells 52, 52 'made of plastic. The half-shells 52, 52 'are screw-connected or screw-connected with each other.

At the longitudinal ends of the housing 50 are support elements 38, 38 'formed in the housing, with which the double drive 14 rests in the mounting position on transverse struts of a support means and is supported on these (see., Reference numerals 36, 36' in FIG Fig. 3 ).

For attachment to a stationary central support part of a support means fastening tabs 54, 54 'are integrally formed on the half-shells 52, 52, as in Fig. 8 and especially good at Fig. 14 recognizable.

The assembly of the double drive 14 on a support means takes place in principle in the same manner as explained in relation to the first embodiment. For this purpose, the double drive 14 is placed by means of the support elements 38, 38 'on the transverse struts of the support means. Following this, the double drive 14 can be screwed via the fastening straps 54, 54 'with its housing with a stationary central support part of a support device. The screw can be made in particular via a tool-operated screwing.

Based on FIGS. 9 to 12 The drive units 18, 18 'of the double drive 14 will be explained in more detail below.

Fig. 9 shows the double drive 14 in the adjustment accordingly Fig. 1 , wherein for reasons of explanation of the structure of the drive units 18, 18 ', the half-shell 52 of the housing 16 is omitted. Below, only the drive unit 18 is explained in detail, the drive unit 18 'is constructed accordingly and will therefore not be explained in detail.

The drive unit 18 has a rotatably mounted in the housing 16, stationary spindle nut 56 which is mounted on a rotatably mounted in the housing 16 and movable in its axial direction threaded spindle 58. With the spindle nut 56, a worm wheel 60 is rotatably connected, which is in engagement with a screw 62 which is in engagement with the drive shaft of an electric motor of the drive unit 18, so that the threaded spindle 58 according to the direction of rotation of the drive shaft of the electric motor in Fig. 10 moved to the left or right.

For power supply and control of the drive units 18, 18 'voltage supply and control means not shown in detail in the drawing are provided, the basic structure of which, however, is generally known to the skilled person and therefore will not be explained in detail here.

On the pivot axis 28 facing the end of the threaded spindle 58, a pressure piece 64 is placed.

Notwithstanding the first embodiment, the pivot lever 26 is formed as a two-armed lever in the second embodiment, the first lever arm 66 the associated to be adjusted support member loosely applied and the second lever arm 68 is connected to the driving member formed by the pressure member 64 of the drive unit 18 in drive connection.

Between the second lever arm 68 and the pressure piece 64 of the drive unit 18, a tab 70 is arranged, the first End remote from the pivot axis 28 is pivotally connected to the second lever arm 68 and the second end of the pressure piece 64 can be pressurized or during the adjustment is pressurized. In the illustrated embodiment, the pressure piece acts on the second end of the tab 70 by means of an engagement surface loose.

Fig. 11 shows the drive unit 18, wherein the pressure piece 64 is omitted for explanation.

Fig. 12 shows the pressure piece 64 taken by itself, in particular an engagement surface 72 of the pressure piece 64 can be seen.

Out Fig. 11 and Fig. 12 as well as a comparison of Fig. 11 With Fig. 12 It can be seen that the engagement surface 72 and the second end of the tab are profiled in cross-section and formed complementary to each other. In the illustrated embodiment, the engagement surface 64 is concave in cross-section and the second end of the tab is correspondingly complementarily convex, with the engagement surface 72 and the end of the tab 70 being arcuate in cross-section.

For biasing the second end of the tab 70 against the engagement surface 72 of the pressure piece 64 spring means are provided which are formed in this embodiment between an inner wall of the housing 50 and the tab 70 acting tension spring in the form of a coil spring 74.

For adjusting the pivot lever 26 and thus the associated support member from the in Fig. 7 illustrated starting position of the adjusting movement in the direction of the in Fig. 8 shown end position of the adjustment movement of the electric motor drives the spindle nut 56 such that the threaded spindle 58 with the pressure piece 64 in Fig. 10 moved to the left. Here, the pressure member 64 presses against the second end of the tab 70. By means of the coil spring 74 is the second end of the Tab 70 is held in engagement with the engagement surface 72. During the movement of the pressure piece 64 in Fig. 10 pivoted to the left of the pivot lever 26 in Fig. 10 in a clockwise direction, so that in the desired manner the acted upon by the pivot lever 26 support member is pivoted.

If the power fails in the case of an adjusted support device, the pivoting lever 26 can be reset manually with the support part thus adjusted in the sense of an emergency release (emergency lowering) as follows:
To perform an emergency lowering of the pivot lever 26 via the in Fig. 10 shown end position of the adjustment out by hand in Fig. 10 moved in the clockwise direction, wherein the second end of the tab 70 of the engagement surface 72 of the pressure member 64 is disengaged. By the coil spring 74 in this case the tab 70 is pulled upwards.

The tab 70 is provided at its lower end with a handle member 76 which is accessible through an opening formed in the housing 50, as is apparent from Fig. 8 is apparent. By means of the grip element 76, the tab 70 can be pulled down and moved out of the path of movement of the pressure piece 64. Subsequently, the pivot lever with the thus adjusted support member in Fig. 10 be reset counterclockwise, wherein the tab 70 moves outside of the housing 50 below the stopped pressure piece.

In order to bring the tab 70 back into engagement with the engagement surface 72 and thus to re-activate the drive unit 18, the pivot lever 26 can be moved by hand Fig. 10 to be moved clockwise, the tab 70 again comes under the action of the coil spring 74 into engagement with the engagement surface 72 of the pressure piece 64.

In this way, an emergency lowering is realized, which in itself has an independent inventive significance.

In Fig. 13 is the distance between the pivot axes 28, 28 'to each other marked with "A". According to one embodiment of the invention, which in itself has an independent inventive meaning in double drives of any kind, the distance "A" is greater than 620 mm. In this way, arise in the adjustment of support parts of a support particularly favorable conditions.

Claims (9)

1. Electric motor double drive (14) for an adjustable support device (2) for supporting a box-spring mattress or an upholstered bed, which has a frame (4) and plate-like support parts (6-12) which are adjustable relative to one another by pivoting, which have at least one fixed middle support part, an upper body support part (8) articulated with one end of the middle support part so as to be pivotable about a horizontal pivot axis and a leg support part (10) articulated with the other end of the middle support part so as to be pivotable about a horizontal pivot axis,
   wherein the double drive (14) has a main body (16), on which two drive units (18, 18') are arranged, wherein in the assembly position of the double drive (14) each drive unit (18, 18') is connected by drive technology to a pivot lever (26, 26'),
   wherein the pivot levers (26, 26') are secured pivotably onto the main body and are in active connection respectively with a support part to be adjusted for adjusting the latter and
   wherein the double drive (14) is designed for tool-free assembly on the support device (2),
   wherein at least one pivot lever (26) in the assembly position of the double drive (14) loosely pressurises the assigned support element,
   wherein at the ends of the main body (16) support elements (38, 38') are formed by means of which the main body (16) in the assembly position of the double drive (14) bears loosely on transverse struts (36, 36') of the support device (2),
   wherein the securing means are provided for securing the middle support part (6) onto the main body (16) of the double drive (14) without tools and,
   wherein the securing means have a screw device (40, 40', 42, 42') activated by hand without tools.
2. Double drive according to claim 1, wherein each pivot lever (26, 26') can be pivoted by means of an assigned output element for pivoting the assigned support part.
3. Double drive according to claim 2, wherein the or each output element can move in linear direction.
4. Double drive according to claim 3, wherein the output element is a spindle nut (24) which is arranged on a threaded spindle (22) so as to be secure against rotation and movable in axial direction, which threaded spindle is in rotary drive connection with an electric motor (20) of the drive unit.
5. Double drive according to claim 3, wherein the output element is a threaded spindle which is mounted so as to be secure against rotation and movable in its axial direction and on which a stationary spindle nut is arranged which is in rotary drive connection with an electric motor of the drive unit.
6. Double drive according to any of the preceding claims, wherein the main body (16) of the double drive (14) is designed as a housing (50), preferably made of plastic.
7. Double drive according to claim 6, wherein the housing (50) consists of two half shells (52, 52').
8. Double drive according to any of the preceding claims, wherein on the main body (16) fixing tabs (54, 54') are formed for screwing the main body (16) onto the stationary middle support part or are formed on the main body (16).
9. Electric motor adjustable support device (2) for supporting a box-spring mattress or an upholstered bed which has a double drive (14) according to any of the preceding claims.

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