Drive device for an element to be driven

Abstract

The invention relates to a drive device for driving an element, having the following: a toothed belt drive with a toothed belt, a frame element which forms two opposite connection plates and a connection wall that connects the two connection plates together, at least three elongated force driving elements which are secured to the toothed belt and are aligned parallel to the width (B) of the toothed belt and parallel to one another and which are arranged within the frame element, wherein a central force driving element is rotationally fixed to the two connection plates, and the end sections of each adjacent outer force driving element extend through curved elongated holes of the connection plate, whereby the outer force driving element can be pivoted and the end faces of the outer force driving elements have cylindrical projections, which are designed as axle stubs and each of which has a roller, outside of one of the connection plates, a toothed disc with tooth recesses for catching teeth of the toothed belt and force driving element recesses for catching the force driving elements, a non-linear guide path, at least some sections of which run parallel to the extension of the toothed belt and in which the rollers arranged on the outer force driving elements are guided, and a drive means which is connected to the frame element and is used to connect to the element to be driven.

Claims

1. A drive device (18) for driving an element, comprising a toothed belt drive with a toothed belt (20), a frame element (72) that forms two opposite connection plates (44) and a connection wall (76), which connects the two connection plates (44) to one another, at least three elongate force drivers (22) that are fastened on the toothed belt (20) and aligned parallel to a width B of the toothed belt (20) and parallel to one another, wherein said force drivers are arranged within the frame element (72), wherein a central force driver (22-1) is fastened on the two connection plates (44) in a rotationally fixed manner and end sections of the adjacent outer force drivers (22) respectively extend through curved oblong holes (48) of the connection plate (44) such that the outer force drivers (22-2, 22-3) can be pivoted, and wherein the ends of the outer force drivers (22-2, 22-3) have cylindrical projections, which are in the form of axle stubs and respectively carry a roller (80), outside of one of the connection plates (44), a toothed disc (26) with tooth recesses (40) for catching teeth of the toothed belt (20) and force driver recesses (42) for catching the force drivers (22), a nonlinear guideway (60), which at least sectionally extends parallel to the extent of the toothed belt (20) and in which the rollers (80) arranged on the outer force drivers (22-2, 22-3) are guided, and a drive means (90) that is connected to the frame (72) element and serves for the connection to the element to be driven.

2. The drive device (18) according to claim 1, wherein the drive means (90) is connected to the connection wall (76) in a rotationally fixed manner.

3. The drive device (18) according to claim 2, wherein the drive means (90) forms a pivot point for connecting an element driver (92).

4. The drive device (18) according to claim 3, wherein the drive means (90) contains a driver opening (94), which is aligned parallel to the force drivers (22) and in which a driver axis (96) of the element driver (92) is rotatably supported.

5. The drive device (18) according to claim 1, wherein the guideway (60) has an arc-shaped section (66) such that the force drivers (22) are moved about the toothed disc (26).

6. The drive device (18) according to claim 1, wherein the toothed disc (26) is in the form of a driven pinion.

7. The drive device (18) according to claim 6, wherein the driven pinion having tooth recesses (40) for catching teeth of the toothed belt (20).

8. The drive device (18) according to claim 1, wherein the guideway (60) has a first straight section (62), a second straight section (64) and an arc-shaped end section (66), wherein the two straight sections (62, 64) are arranged angular to one another.

9. The drive device (18) according to claim 8, wherein a driven pinion is arranged on a free end of the first straight section (62); wherein the toothed disc (26) is arranged in the region of the transition from the first straight section (62) to the second straight section (64); wherein the drive device (18) further comprises an additional toothed disc (26-2) arranged in a region of the arc-shaped end section (66); wherein the force drivers (22) are moved about the additional toothed disc (26-2).

10. The drive device (18) according to claim 1, wherein the driven element is a door (50).

11. The drive device (18) according to claim 1, wherein the force drivers (22) are connected to the toothed belt (20) by means of a clamping connection.

12. The drive device (18) according to claim 11, wherein the force drivers (22) consist of two parts, namely a lower part (32) that in a fastened state is arranged on an inner side (28) of the toothed belt (20) and an upper part (30) that is arranged on an outer side (24) of the toothed belt (20), wherein said lower part and upper part can be connected to one another in such a way that they clamp the toothed belt (20) between one another.

13. The drive device (18) according to claim 12, wherein the upper part (30) and the lower part (32) are screwed to one another in the fastened state.

14. The drive device (18) according to claim 1, wherein the force drivers (22) have a length L, which in a fastened state extends parallel to the width B of the toothed belt (20) and exceeds the width B of the toothed belt (20), wherein a lower part (32) and an upper part (30) are connected to one another with the aid of connecting means (34) that extend laterally adjacent to the toothed belt (20).

Description

(1) In the figures:

(2) FIG. 1 shows a toothed belt section with an inventive force driver in order to elucidate the fastening principle,

(3) FIG. 2 shows a sectional view of a toothed belt section with a force driver fastened thereon,

(4) FIG. 3 shows a side view of an inventive toothed disc with a toothed belt section and three force drivers;

(5) FIG. 4 shows a side view according to FIG. 3 with an additional connection plate,

(6) FIG. 5 shows an inventive drive device with a guideway and a door in the open position,

(7) FIG. 6 shows the drive device according to FIG. 5 with the door in the closed position,

(8) FIG. 7 shows an enlarged perspective view of a force driving element with driver element,

(9) FIG. 8 shows a side view of the force driving element according to FIG. 7,

(10) FIG. 9 shows a bottom view of the force driving element according to FIG. 7,

(11) FIG. 10 shows a side view of the force driving element according to FIG. 7, and

(12) FIG. 11 shows a front view of the force driving element according to FIG. 7.

DESCRIPTION OF SPECIFIC EMBODIMENTS OF THE INVENTION

(13) FIG. 1 shows a section of a toothed belt 20, on which an inventive force driver 22 is fastened. The toothed belt has an outer side 24 and an inner side 28 that faces a toothed disc 26 (see FIGS. 3 and 4). The inner side 28 usually has teeth 28 that are not illustrated in the figures.

(14) The force driver 22 is formed by an essentially cylindrical body that is divided into an upper part 30 and a lower part 32. In the exemplary embodiment shown, the upper part 30 and the lower part 32 are connected to one another with connecting means 34, preferably clamping screws, in such a way that the toothed belt 20 is arranged between these two parts. In this case, the lower part 32 is arranged on the inner side 28 and the upper part 30 is arranged on the outer side 24 of the toothed belt. A serrated inner surface of the lower part 32, which faces and corresponds to the teeth of the toothed belt 20, is not illustrated in this figure. The teeth engage into correspondingly shaped depressions in the inner side of the lower part 32 such that a form-fitting frictional connection between the force driver 22 and the toothed belt 20 is produced.

(15) In the exemplary embodiment shown, the lower part 32 has openings 36, into which the connecting means 34 can be inserted, preferably screwed. The connecting means 34, which are illustrated in the form of clamping screws, extend laterally of the toothed belt 20 and do not penetrate this toothed belt. The force driver 20 has a length that correspondingly exceeds the width B of the toothed belt 20.

(16) This figure furthermore shows two drive elements 38, which are realized in the form of axle stubs and laterally protrude over the toothed belt referred to its width B. However, it would also be possible to provide only a single drive element 38 instead of the two laterally protruding drive elements 38. In a manner of speaking, the drive elements 38 represent an extension of the force driver 22 in its longitudinal direction, which in the fastened state respectively extends parallel to the width B of the toothed belt or transverse to a longitudinal extent X-X of the toothed belt. According to the invention, the axle stubs or the projections respectively carry a roller 80 (see FIGS. 7-11).

(17) FIG. 2 shows the arrangement of a force driver 22 on the toothed belt 20 in the form of a sectional view.

(18) FIG. 3 shows three adjacent force drivers 22 that are arranged on the toothed belt 20. This figure furthermore shows that the toothed disc 26 has on the one hand tooth recesses 40 for receiving and catching the teeth of the toothed belt 20 and on the other hand force driver recesses 42 for receiving and catching the force drivers 22. When the toothed disc 26 drives the toothed belt and the force drivers 22 are located in the force driver recesses 42, the driving force of the toothed disc 26 is directly transmitted to these force drivers.

(19) FIG. 4 shows a simplified illustration that elucidates the function of an inventive connection plate 44. The connection plate 44 shown connects the three force drivers 22 to one another in the pulling direction of the toothed belt 20. The central force driver 22 is non-rotatably supported in this case.

(20) The connection plate 44 furthermore contains two curved oblong holes 48, into which respectively cylindrical projections of the outer force drivers 22 extend. The rollers 80 arranged on these projections are not illustrated in this figure. The curved oblong holes 48 allow a pivoting motion of the connection plate 44 during the change in direction by means of the toothed disc 26. The connection plate 44 simultaneously ensures that forces are distributed over the three force drivers 22 and that the tension of the toothed belt 20 remains unchanged.

(21) FIG. 5 shows a preferred variation of an inventive drive device 18 in the form of a simplified schematic illustration. This figure shows an element driver 92 that is pivotably supported on a drive means 90 of the force driving element 56. The element driver 92 serves for the connection to the element to be driven, e.g. a not-shown door 50. The force driving element 56 is connected to the toothed belt 20. Not-shown rollers 80 arranged on the ends of the force drivers 22 are guided in a guideway 60. The guideway 60 has a first straight section 62 and a second straight section 64. A preferably electric driving motor 68 (see FIG. 6) drives the toothed belt 20 by means of a pinion 70. A first toothed disc 26-1 is arranged in the region of the transition from the first section 62 to the second section 64. The door 50 is in its open position.

(22) FIG. 5 also shows that only three force driver recesses 42 are provided for catching the force drivers 22. Since the force drivers 22 always travel exactly the same distance, the first toothed disc 26-1 also can be exactly adapted to the position of the force drivers 22, wherein only a one-time preadjustment of the device is required. This figure furthermore shows that only the pinion 70 is driven, but not the first toothed disc 26-1. In this way, slipping of the force drivers 22 on the first toothed disc 26-1 is effectively prevented.

(23) FIG. 6 shows a variation with a beyond-dead-center position. A second toothed disc 26-2 is arranged in the region of the arc-shaped end section 66. In this variation, the force driving element 56 is moved from the first section 62 up to the arc-shaped end section 66, but does not pass the pinion 70. This pinion insofar also has no force driver recesses 42, but only tooth recesses 40. A beyond-dead-center position is reached in this closed position. This is indicated by the line L.

(24) FIGS. 7-11 show the structure of the force driving element 56. A central force driver 22-1, which cannot be pivoted or rotated, is arranged in a frame element 72. A second force driver 22-2 and a third force driver 22-3 are arranged adjacent thereto and can be pivoted due to the oblong holes 48 such that the force driving element 56 can move about the toothed discs 26. The frame element 72 basically forms two opposite connection plates 44 and a connection wall 76, which connects the two connection plates to one another. The outer force drivers 22 extend through the oblong holes 48 and carry rollers 80.

(25) A drive means 90 preferably is provided transverse to the longitudinal direction of the toothed belt 20, i.e. extending perpendicular to the force drivers 22, wherein said drive means is connected to the frame element 72 and serves for the connection to the element driver 92 to be driven. The drive means 90 preferably is connected to the connection wall 76 in a rotationally fixed manner. It preferably forms a pivot point for connecting an element driver 92, which in turn is connected to the element to be driven, e.g. a door 50. For this purpose, the drive means may contain a driver opening 94, which is aligned parallel to the force drivers 22 and in which a driver axis 96 of the element driver 92 is rotatably supported.

(26) The invention is not limited to the described exemplary embodiments, but rather also includes other variations that are covered by the claims. Instead of providing three force drivers 22, it would particularly also be possible to provide more force drivers 22. An arrangement of connection plates 44 on both sides of the force drivers 22 would also be conceivable.