CN101686759B - Furniture drive - Google Patents

Abstract

The invention relates to a furniture drive comprising a drive unit (1) having an electric motor and a drawer pull-out guide comprising a furniture body rail (10), a center rail (11) and a drawer rail (12), wherein the center rail (11) and the drawer rail (12) are mechanically positively controlled relative to one another, wherein the drive unit (1) drives the center rail (11).

Description

furniture drive

technical field

The invention relates to a furniture drive, comprising a drive unit with an electric motor, a drawer pull-out guide, the drawer pull-out guide comprises a furniture body guide rail, a middle guide rail and a drawer guide rail, wherein the middle guide rail and the drawer guide rail are connected to each other Mechanically enforced control.

Background technique

Such a furniture drive is known, for example, from EP 1 323 363 A1. The furniture drive shown there has the problem that it has to be constructed relatively large. It is therefore usually fastened between two drawer pull-out guides on the back of the furniture body. However, for various reasons it is desirable to provide a furniture drive which is so compact that it can be fastened directly to the drawer extension guide. In this case, for example, the installation of the drawer extension guide and the furniture drive in the constructed unit can be carried out in one work step. It can be seen from this that the space in the area of the rear side of the furniture body and between the drawer extension guides remains empty.

Contents of the invention

The object of the present invention is to provide such a furniture driving device, which comprises: a driving unit with an electric motor; The center rails and the drawer rails are mechanically coercive to each other.

This object is achieved by a furniture drive in which the drive unit drives the central rail.

As a result of the measures described above, it is achieved that the furniture drive only has to be activated on half the opening path of the drawer fastened to the drawer rail. This allows a very compact construction of the furniture drive.

Further preferred embodiments of the invention emerge from the subclaims.

Description of drawings

Additional advantages and details emerge from the figures and the associated figure description. Shown here:

Figures 1a, 1b show a perspective view of an embodiment of the drive unit of the furniture drive according to the invention with the cover installed or removed,

Figure 2 shows the drive unit as shown in Figures 1a, 1b in an exploded view,

Figure 3 is a schematic diagram of the drawer pull-out guide, from which it can be seen that the transmission chain between the guide pulley and the drawer guide rail is formed,

Figures 4a, 4b are perspective and detailed views of an embodiment of a drawer extension guide with a furniture drive fastened thereon,

Figures 5a, 5b are front and detail views of the drawer pull-out guide shown in Figures 4a, 4b,

Figures 6a to 6c are perspective and detailed views of the other of Figures 4 and 5, and

Figures 7a, 7b are further perspective and detail views to Figures 4 and 5 .

Detailed ways

It should first be stated that with the furniture drive according to the invention it is possible not only to open but also to close movable furniture parts (eg furniture flaps, drawers). In the exemplary embodiment shown, this is achieved by a reversible electric motor.

FIG. 1 a clearly shows the compact structure of the drive unit 1 for furniture drives according to the invention, wherein it can be seen in FIG. 1 a that on the left is the housing of the electric motor 2 and on the lower right is an output section Shaft 4 , which is output parallel to the housing of electric motor 2 and extends laterally beside the electric motor. The drive shaft 3 of the electric motor 2 (which is not visible per se in Fig. 1a) extends along an imaginary axis 3'. The output shaft 4 extends along an imaginary axis 4'. In this exemplary embodiment it is provided that the imaginary axes 3', 4' and thus the drive shaft 3 and the output shaft 4 run laterally offset and parallel to one another.

In FIG. 1 b the housing 12 has been removed so that the transmission 5 can be seen. The specific structure of the drive unit 1 is shown in the exploded view of FIG. 2 .

The drive chain begins with an electric motor 2 which has a drive shaft 3 . The drive shaft 3 is connected to the side of a dog coupling 14 with sound insulation. The other side of the jaw coupling 14 is connected with a screw rod 15 . The gears 16 - 19 shown form the reduction gear 6 of the transmission 5 . The screw 15 engages in a gear 16 , which is mounted on a shaft 20 in a rotationally fixed connection with a gear 17 . The shaft 20 itself is supported between housing parts 21 , 22 . The gear 17 meshes with a gear 18 which in turn meshes into a gear 19 . It should be noted that the rotational movement of the screw 15 about the vertical axis is converted by the gears 16-18 into a rotational movement about the horizontal axis, where the gear 19 again performs a rotational movement about the vertical axis and here the vertical axis is offset laterally and extending parallel to the original vertical axis. The gear wheel 18 is also supported between the housing parts 21 , 22 via a shaft 23 . A spacer 5 in the form of a sleeve is arranged between the gear wheel 19 and the other housing part 24 . Arranged in the drive train after the gear unit 6 is an overload clutch 7 formed by a thrust bearing 27 and a component 28 as well as a freewheel clutch 8 which can be braked by a brake 29 . The transmission 6 interacts with the overload clutch 7 via an output element 26 . The output shaft 4 is fixed on the freewheel clutch 8 . On the output shaft 4 is fixed a rope pulley 30 of a traction rope 9 not shown in FIG. 2 , through which the driving force is transmitted further away from the furniture drive device 1 .

FIG. 3 schematically shows another course of the drive chain, showing a furniture body rail 10 to be fastened to the furniture body, an intermediate rail 11 and a drawer rail 12 to be connected to the drawer. The center rail 11 and the drawer rail 12 are connected to each other in a known manner by means of a positive control device, so that a movement of the center rail 11 leads to a corresponding movement of the drawer rail 12 . The positive control device here comprises a traction rope 32 extending between two rollers 31 , one of the drivers 33 being firmly connected to the traction rope 32 . The driving member 33 is connected to the drawer guide rail 12 through a coupling member 34 . Another driving part 42 is firmly connected with the traction rope 32 . This driver 42 itself is firmly connected via a tongue 43 to the furniture body rail 10 (see FIG. 7 b ).

The drive of the central guide rail 11 extends via a driver 35 firmly connected thereto, which is also firmly connected to the traction rope 9 , which can be driven by the rope pulley 30 here. Here again the traction rope 9 runs through a deflection pulley 36 , which has no drive function.

The driving force of the drive unit 1 is also transmitted from the output shaft 4 via the pulley 30 and the traction rope 9 to the entrainer 35 and thus to the intermediate guide rail 11 . The central rail 11 thus moves back and forth parallel to the stationary furniture body rail 10 according to the direction of travel of the traction rope 9 . This movement of the middle rail 11 is transmitted to the drawer rail 12 and thus to the drawer connected to the drawer rail 12 (not shown in FIG. . The drawer can also be freely moved back and forth between a fully closed position and a fully opened position in the furniture body via the furniture driving device 1 .

FIGS. 4 a and 4 b show two displacement measuring devices, which are formed on the one hand by a potentiometer 37 and an adjustment element 38 and on the other hand by a potentiometer 39 and a gear mechanism 40 . The signal of the displacement measuring device can be fed to a control or regulation device (not shown) for the furniture drive, where a control or regulation of the furniture drive can take place on the basis of this signal. First of all, a touch-latch function (Touch-Latch-Funktion) can be realized, that is to say, as soon as a user-induced movement of a furniture part (here a drawer) is detected by one of the displacement measuring devices, the control or regulating device Activate drive unit 1 of the furniture drive.

In this case, the adjusting element 38 of the first displacement measuring device is connected to the center rail 11 via a component 41 and can thus determine the position of the center rail 11 . Since the drawer rail 12 is connected to the central rail 11 via a positive control device, the position of the drawer rail 12 can also be determined indirectly. For the opening of the drawer, this applies to the contact-latching-function. The setting element 38 is separated from the component 4 after a predetermined distance.

For the contact-latching function, a second displacement measuring device can be used when closing. The potentiometer 39 of the second displacement measuring device is connected to the output shaft 4 via a gear mechanism 40 and can thus also determine the position of the drawer rail 12 .

5a and 5b show views from the front of the drawer extension guide.

Figures 6a-6c show the drawer rail 12 in a partially extended state (approximately in the middle position). The center rail 11 is thus also partially visible. In particular, deflection wheels 31 (cf. FIG. 3 ) and traction ropes 32 of the positive control can be seen. Furthermore, deflection wheels 36 , which are fastened in the furniture body rail 10 , can be seen on the left in FIG. 6 b , as well as the traction rope 9 .

Figures 7a-7b show the drawer pull-out guide with the drawer rail 12 fully retracted and the middle rail fully retracted. In particular, another steering wheel 31 of the positive control can be seen in FIG. 7 b. Furthermore, it can be seen that the driver 42 is arranged on a tongue 43 connected to the furniture body guide rail 10 .

Claims (6)

1. furniture drive, it comprises:

Driver element with motor,

Drawer pull-out guide device, this drawer pull-out guide device comprises furniture body guide rail, middle guide rail and drawer guideway, wherein middle guide rail and drawer guideway are mechanically positively controlled mutually,

It is characterized in that driver element (1) drives middle guide rail (11).

2. according to the furniture drive of claim 1; It is characterized in that; Said motor (2) has driving shaft (3), and this driving shaft connects with the output shaft (4) of driver element (1), and wherein output shaft (4) almost is parallel to driving shaft (3) is arranged on motor (2) with extending on side direction next door.

3. according to the furniture drive of claim 1 or 2, it is characterized in that driver element (1) has transmission device (5), wherein said transmission device (5) has decelerator (6) and/or safety clutch (7) and/or slipping clutch (8).

4. according to the furniture drive of claim 1, it is characterized in that driver element (1) is connected with middle guide rail (11) constantly.

5. according to the furniture drive of claim 4, it is characterized in that driver element (1) connects with middle guide rail (11) through pull rope (9).

6. according to the furniture drive of claim 3, it is characterized in that motor (2), transmission device (5) and output shaft (4) are provided with in this wise, make the longitudinal length of driver element (1) draw by the longitudinal length of motor (2) basically.

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