ES2757600T3 - Drive device for an item to be driven - Google Patents

Abstract

Drive device (18) for driving an element, which has - a toothed belt drive with a toothed belt (20), - at least one toothed disc (26, 26-1, 26-2) with notches for teeth ( 40) to drive the teeth of the timing belt (20), - a non-linear guide track (60) at least in sections, in which the element is guided through a guide means (58), characterized by that - at least one force driver (22) is provided fastened to the toothed belt (20), - the at least one toothed disc (26, 26-1, 26-2) has notches for force drivers (42 ), to drive the at least one force driver (22), wherein - the force driver (22) forms a connecting element (38), which can be attached to the element to be actuated, - the by at least one toothed disc (26, 26-1, 26-2) deflects the toothed belt (20) and thus also the force driver (22) corresponding to the guide track (60) non-linear by sections.

Description

DESCRIPTION

Drive device for an item to be driven

The present invention relates to a driving device for driving an element with a toothed belt, a toothed disc and a non-linear guide track at least in sections, in which the element is guided through a guide means.

Timing belts generally have a smooth side and a toothed side. Typically, the toothed side is provided on the outside, while the inside of the toothed belt is provided with teeth. The toothed belt wraps the toothed disc, and the teeth of the toothed belt mesh in the notches between the teeth of the toothed disc, such that the toothed disc drives the toothed belt by means of the notches between the teeth and the teeth.

Toothed belt drives are often used to transport objects to be transported or moved horizontally. In particular, the toothed belt drives also serve as door drives for opening and closing elevator doors, in particular for doors of vehicles of local and long-distance public transport services.

Frequently, in the circumferential toothed belt drive, only one of the toothed discs is driven, while the other or also several toothed discs only move concomitantly and reverse the direction of movement of the toothed belt.

The attachment to the toothed belt of the elements to be moved or transported is carried out, for example, by means of draggers. Problems often arise because the grip of the drivers on the dental strap is not sufficient to transmit large driving forces. The skidders come loose due to peak loads or in the course of operation, resulting in repair and other costs.

Timing belts are normally made of plastic material, which is reinforced by longitudinally extending cables or wires. The cables or wires, which are essential to absorb the tensile forces, must not be damaged by the fastening of the drivers, since otherwise the stability and resistance to breakage of the toothed belt is impaired. Also for this reason, the transmission of force on the elements to be actuated or driven by means of the drivers is limited.

Another problem is that a transmission of force only occurs along the longitudinal extension of the toothed belt, that is, in the x direction. Although a deflection of the driven element is possible through the drivers, for example by means of guide rails, this, however, causes a high loss of drive energy due to the division of the force conduction in a x component (parallel to the direction of the timing belt movement) and a y component (transverse to the direction of the timing belt movement).

This problem occurs, for example, in sliding-swinging doors, which move parallel and, in sections, transverse to the exterior wall of the vehicle and which are guided on a curved path guide track. The drive is carried out by means of a toothed belt drive, in which the door is connected to the toothed belt by means of a driver. Due to the straight development of the timing belt, the driving force is only introduced in one direction (the x direction), but in the course of the movement, due to the guide rail extending in a curved manner, it is divided into an xy component a y component (transverse to the x direction). Due to this division substantial losses of drive energy occur. Such a drive with the mentioned disadvantages is shown in US 2007/0108798 A1.

The object of the present invention is to prevent the above-mentioned disadvantages in the state of the art through an improved drive device for driving an element, which has a toothed belt drive. In particular, the drive device is intended to improve the use of drive energy and to ensure long-lasting, low-maintenance operation of the toothed belt drive.

According to the present invention, this objective is achieved by means of an actuation device, which has the characteristics of the independent claim.

The actuation device according to the present invention is particularly suitable for the actuation of sliding-swing doors there were other similar elements, such as windows or covers. The force from the toothed belt drive is also optimally transmitted to the element to be driven, even if it deviates above the at least one toothed disk of the drive according to the present invention outside the guide track straight in another direction.

Therefore, the drive device has at least one toothed disc with notches between the teeth to drive the teeth of the toothed belt, as well as notches between force draggers to drag at least one force driver, which normally does not produce the drive, but only deflects the toothed belt. In the context of the present invention, however, this toothed disc can also be designed as a drive toothed disc. In this case, the driving force is transmitted from the toothed disc to the toothed belt or to the element to be driven not only to the teeth of the toothed belt, but also to at least one force driver, which engages in the corresponding notches between the force drivers of the toothed disc. With this it is then possible, if necessary, to transmit even greater forces.

In particular, several force draggers can jointly move the element to be actuated. If several force drivers are simultaneously located in notches for the force drivers of the toothed disc, the toothed belt is substantially discharged, since the forces are distributed among the various force drivers. This is also advantageous, because by guiding the force transducers through the toothed disc a change of direction from the previously predominantly exclusively steering component in the x direction can occur. Directional changes are often associated with spikes in dynamic loading, which can be absorbed and compensated for by direct bonding of the force transducers to the toothed disc. The deviation of the direction by means of the toothed disc can be carried out correspondingly to the common toothed belt drives by a few degrees until a complete 180 ° change of direction is reached.

In a particularly advantageous embodiment, the force transducer is clamped to the timing belt exclusively. The clamping joint has the substantial advantage that the structure of the toothed belt is not modified by the clamping. In particular, the cables or wires inside the toothed belt are kept intact.

In order to ensure a clamping connection, the force driver is preferably divided into an upper side and a lower side, between which in the clamped state the toothed belt is arranged. The lower side is arranged on the toothed side of the toothed belt and for a better transmission of force in the x direction it can have an inner side facing the toothed belt, which corresponds to the teeth of the toothed belt. For example, the lower part may have a serrated contour, on which the teeth of the toothed belt rest. This leads to a force-pull form union of the force driver with the timing belt.

The joining of the upper side and the lower side can be carried out by any appropriate means. It has been shown to be advantageous if the force driver has a length that exceeds a width of the timing belt (transverse to the longitudinal extension). The length of the force driver in the state attached to the timing belt extends transversely to the direction of travel or longitudinal extension of the timing belt. The upper part is attached to the lower part by means of connecting elements, for example by means of screws, and these screws are arranged on the sides of the toothed belt and do not pass through it.

The force driver also forms a connecting element, which can be attached to the element to be actuated. Preferably a projecting section is provided, which can be attached to the element to be actuated or with an additional intermediate connecting element. Such a protruding section may be formed, for example, by a cylindrical axial journal. An axial trunnion is particularly suitable because it allows a tilting or rotary connection with the element to be actuated or with the intermediate connection element arranged in between. This tilting or rotating capacity between the connecting element and the element to be actuated is necessary to be able to guide the element to be actuated along the circumference of the toothed disc, when it deviates the force driver. However, the tilting or rotating capacity does not necessarily have to be ensured by the force driver or the connecting element itself, but a rigid union is also possible at that site, if the tilting or rotating capacity is carried out at another site between the force driver and the element to be activated.

In a particularly simple preferred embodiment variant, the force driver is realized as a substantially cylindrical element, where a laterally projecting section over the width of the toothed belt, that is, an axial journal on the end side, serves as a Union. In this regard, the force driver can have only one connecting element on one side of the toothed belt or also two connecting elements on both sides of the toothed belt.

In accordance with the present invention, the transmission of force to the element to be actuated which can be further improved if several force drivers are arranged juxtaposed on the toothed belt, which are joined with a single element to be actuated. An additional tie plate joins the at least two force drivers so that the pulling forces of one force driver can be transmitted to the adjacent force driver through the tie plate. For this, the connecting plate must be pivotally or rotatably attached to one of the two force drivers and preferably has a curved oblong hole, within which a force transmission section of the adjacent force driver extends. The force transmission section may be formed by the connecting element, that is, for example, by an axial stub, which extends through the curved oblong hole. The curved oblong hole is necessary because otherwise a deviation of the toothed belt by means of the toothed disc would not be possible. To further improve the transmission of force to the element to be actuated, an odd number of force drivers can preferably be provided, which are connected to one another through the connection plate. The tie plate is pivotally or rotatably attached to the center force driver, and the force transmitting sections of the adjacent force drivers extend into corresponding curved oblong holes. Only the central force driver is attached to the element to be actuated by means of its connecting element, in such a way that the forces that are presented are distributed by means of the connecting plate to all the joined force drivers. For example, clusters of three or five force drivers, linked together by means of a tie plate, have been shown to be particularly suitable. Advantageously, the tension within the toothed belt is not increased by the union of the force drivers with each other in contact with the toothed disc.

In a particularly advantageous variant of embodiment, the guide track has an arched section section, whereby the force driver moves in such a way around the toothed disc that a position is produced that exceeds the neutral point. Therefore, a closed position of the element to be actuated, for example a door, can be achieved, which cannot be canceled without a backward movement of the toothed belt in the opposite direction. Therefore, the door is securely locked, for example for the passengers of the vehicle.

To carry out the movement of a sliding-swing door with subsequent blocking, the guide track has a first straight section section, a second straight section section and an arched section section on the end side, in which the two straight section sections are arranged at an angle to each other. Therefore, the door can be slid out of the door portal and subsequently parallel to the outer wall of the vehicle. If the door is in the door portal, it is safely locked in the end position due to deadlock exceeded.

Preferably, a pinion drive is provided at a free end of the first straight section section, a first toothed disc in the area of the transition from the first straight section section to the second straight section section and a second toothed disc in the area of the section of arched section on the end side.

The present invention is described in more detail below with reference to the following figures. The figures only show preferred embodiment characteristics and are not intended to limit the invention thereto.

In the figures:

Fig. 1 shows a toothed belt section with a force driver according to the present invention,

Fig. 2 shows a sectional representation of a toothed belt section with the force driver attached,

Fig. 3 shows a side view of a toothed disc according to the invention with a toothed belt section and three force drivers,

Fig. 4 shows a side view according to Fig. 3, but additionally with a tie plate according to the invention,

Fig. 5 shows a drive device according to the invention with guide track and door in open position,

Fig. 3 shows the actuation device of Fig. 5 with the door in the closed position,

Fig. 7 shows an enlarged representation of a second variant of a force-pulling element, Fig. 8 shows a frame element according to Fig. 7,

Fig. 9 shows an exploded representation of a force-pulling element.

Figure 1 shows a section of a toothed belt 20, in which a force driver 22 according to the present invention is held. The toothed belt has an outer side 24 and an inner side 28 facing a toothed disc 26 (see Figures 3 and 4). The inner side 28 normally has teeth, which are not shown in the figures.

The force driver 22 is formed by a substantially cylindrical body, which is divided into two parts and it has an upper part 30 and a lower part 32. The upper part 30 and the lower part 32 in the shown embodiment are connected to each other by means of a connection means 34, such that the toothed belt 20 is arranged between they. In this regard, the lower part 32 is arranged on the inner side 28 and the upper part 30 on the outer side 24 of the toothed belt. An indented inner surface of the bottom part 32 is not shown, which is oriented towards and corresponds to the teeth of the timing belt 20. The teeth engage correspondingly in depressions on the inner side of the bottom part 32, such that a force drag connection of the force driver 22 with the timing belt 20 occurs.

In the exemplary embodiment shown, the lower part 32 has openings 36, into which connection means 34 can be inserted, preferably screwed in. The connection means 34, represented as a clamping screw, extend laterally with respect to the strap notched 20 and do not go through it. The force driver 22 has a length, correspondingly exceeding the width B of the timing belt 20.

Two connecting elements 38 are also shown, which are made as axial trunnions and, relative to the width B of the toothed belt, project laterally with respect to it. Instead of the two respectively laterally protruding connecting elements 38, only one connecting element 38 can also be provided. The connecting elements 38 represent a kind of force-pulling extension 22 in its longitudinal direction, which in its clamped state extends parallel to the width of the timing belt B or transversely to a longitudinal extension XX of the timing belt, respectively.

Figure 2 shows the arrangement of the force driver 22 in a sectional representation on the toothed belt 20.

Figure 3 shows a preferred embodiment variant, in which three adjacent force drivers 22 are arranged on the toothed belt 20. Furthermore, it can be seen that the toothed disc 26 on the one hand has notches for the teeth 40, to receive and drag the teeth of the timing belt 20, as well as notches for the force drivers 42, for receiving and driving the force drivers 22. If the toothed disc 26 drives the toothed belt and the force drivers 22 are in the notches for the drivers of force 42, then the toothed disc drive force 26 is transmitted directly to the belt.

Another advantageous further development of the present invention is depicted in FIG. 4. A connecting plate 44 is shown, which joins together the three force drivers 22 in the direction of traction of the toothed belt 20. In this regard, the connecting plate 44 is supported in a tilting or rotating manner, respectively, in the central force dragger 22. The connecting element 38 made as an axial trunnion extends through a circular opening 46 in the connecting plate.

The connecting plate 44 further has two curved oblong holes 48, into which respectively a connecting element 38 of the adjacent force driver 22 extends. The curved oblong holes 48 allow a rotation of the connecting plate 44 during the change of direction by the toothed disc 26. At the same time, the connection plate 44 causes the forces to be distributed on the three force drivers 22 and simultaneously the tension of the toothed belt 20 remains unchanged. The connection element 38 of the drive driver Central force 22 serves as the single point of attack of the force for the attachment of an element to be actuated, not shown in the example.

Figures 5 and 6 show a preferred embodiment variant of an actuation device 18 according to the invention in a simplified principle representation. A door 50 can be seen, which by means of a door driver 52 and a swing bridge 54 relative to the door driver 52 is connected by means of a force driver 56 to the toothed belt 20 and guided by means of a Guide pulley 58 on a guide track 60. Guide track 60 has a first straight section section 62, a second straight section section 64 and a curved section section on the end side 66. A drive motor 68, preferably electric, it drives the toothed belt 20 by means of a pinion 70. A first toothed disk 26-1 is arranged in the region of the transition from the first section section 62 to the second section section 64 and a second toothed disk 26-2 it is arranged in the area of the curved section section on the end side 66. In this embodiment, the force-pulling element 56 moves from the first section section 62 to the curved section section on the end side 66, although it didn't happen a on the pinion 70. Correspondingly, the latter does not have any notches for force drivers 42, but only notches for teeth 40. Figure 5 shows the position of the door 50 in the open position, while Figure 6 shows the closed position. In this closed position, a position in excess of the neutral position has been reached. This is indicated by line L in the drawing.

Figures 7, 8 and 9 show a second advantageous embodiment variant of the force-dragging element 56. A central force-dragging device 22-1 is arranged in a frame element 72, which is neither tilting nor rotating. Next to it are arranged a second force driver 22-2 and a third force driver 22-3, which due to the oblong holes 48 are tiltable, so that the force driver element 56 can move around the toothed discs 26 The frame element 72 in principle forms two mutually opposite connecting plates 44 and a connecting wall 76, which joins the two connecting plates together.

To the first force driver 22-1, in the exemplary embodiment shown, the door 50 is connected through the door driver 52 and the connecting bridge 54. On the opposite side of the connecting bridge 54, it is supported as guide means rotatably the guide roller 58 on the force driver 22-1. In addition, an extension element 74 can be seen, which serves for the connection of the connection bridge 54 and which is arranged in extension of the longitudinal axis of the first force driver 22-1. The extension element 74 in the exemplary embodiment shown is made as a bolt-on additional element, that is, it does not have a direct connection with the first force driver 22-1.

It is explicitly underlined that the attachment of the driven element to the toothed belt 20 in the drive device 18 shown in Figures 5 and 6 can also be effected by means of the force drivers 22 according to Figures 1 to 4.

The present invention is not limited to the described embodiment examples, but also includes other embodiment variants, which are covered by the appended claims. In particular, instead of three force drivers 22, a greater number of force drivers 22 can also be provided. A bilateral arrangement of connecting plates 44 is also conceivable on the force drivers 22.

Claims (18)

1. Drive device (18) to drive an element, which has - a toothed belt drive with a toothed belt (20), - at least one toothed disc (26, 26-1, 26-2) with tooth notches (40) to drive the teeth of the toothed belt (20), - a non-linear guide track (60) at least in sections, in which the element is guided through a guide means (58), characterized by that - at least one force driver (22) is provided fastened on the toothed belt (20), - the at least one toothed disc (26, 26-1, 26-2) has notches for force drivers (42), to drive the at least one force driver (22), wherein - the force driver (22) forms a connecting element (38), which can be attached to the element to be operated, - the at least one toothed disc (26, 26-1, 26-2) deflects the toothed belt (20) and thus also the force driver (22) corresponding to the non-linear guide track (60) by sections. 2. Drive device (18) according to claim 1, characterized in that the guide track (60) has a curved section section (66), in such a way that the force driver (22) can move in such a way forms around the at least one toothed disc (26, 26-1,26-2) that a position in excess of neutral is reached. 3. Drive device (18) according to claim 1 or claim 2, characterized in that the at least one toothed disk (26, 26-1,26-2) is made as a driven pinion. Drive device (18) according to one of Claims 1 to 3, characterized in that a driven pinion with only notches for teeth (40) is provided to drive the teeth of the timing belt (20). 5. Drive device (18) according to one of claims 1 to 4, characterized in that the guide track (60) has a first straight section section (62), a second straight section section (64) and an arched section section on the end side (66), where the two straight section sections (62, 64) are angularly arranged with each other. 6. Drive device (18) according to claim 5, characterized in that a driven pinion is arranged at a free end of the first straight section section (62), a first toothed disc (26-1) in the area of the transition from the first straight section section (62) to the second straight section section (64) and a second toothed disc (26-2) in the area of the curved section section on the end side (66), and the driver of force (22) can be moved in such a way around the second toothed disk (26-2) that in relation to a backward movement of the element to be actuated, a position in excess of the neutral position is reached. 7. Drive device (18) according to one of claims 1 to 6, characterized in that the driven element is a door (50). 8. Drive device (18) according to one of claims 1 to 7, characterized in that the force driver (22) is connected to the toothed belt (20) by means of a clamping connection. 9. Actuation device (18) according to claim 8, characterized in that the force driver (22) is made in two parts and in the clamped state has a lower part (32) arranged on an inner side (28 ) of the timing belt (20) and an upper part (30) arranged on an outer side (24) of the timing belt (20), which can be joined in such a way that they clamp the timing belt (20) between them. 10. Drive device (18) according to claim 9, characterized in that the upper part (30) and the lower part (32) in the clamped state are screwed together. 11. Drive device (18) according to one of claims 8 to 10, characterized in that the force driver (22) has a length L, which in the clamped state extends parallel to a width B of the toothed belt ( 20), which exceeds the width B of the toothed belt (20), where the lower part (32) and the upper part (30) are joined to each other through joining means (34), which extend laterally next to the timing belt (20). 12. Drive device (18) according to one of claims 1 to 11, characterized in that the force driver (22) has a cylindrical projection made as an axial journal as a connecting element (38). 13. Drive device (18) according to claim 12, characterized in that the cylindrical projection forms a free end of the force driver (22), which protrudes transversely with respect to a longitudinal extension XX of the toothed belt (20) . Actuating device (18) according to claim 13, characterized in that the force driver (22) has two connecting elements (38) which each protrude laterally with respect to the width on the end side B of the timing belt (20). 15. Actuating device (18) according to one of claims 1 to 14, characterized in that at least two force drivers (22) are provided, which are connected to each other via a connecting plate (44) . 16. Actuation device (18) according to claim 15, characterized in that the connection plate (44) is supported in a tilting manner on a first force driver (22) and has an oblong hole (48), inside the extending a force transmission section of the second force driver (22). 17. Drive device (18) according to claims 15 or 16, characterized in that an odd number of force drivers (22) are connected to each other through the connection plate (44), wherein the Central force (22) is pivotally attached to the tie plate (44) and force transmitting sections of adjacent force drivers (22) each extend into curved oblong holes (48) in the tie plate (44). 18. Actuation device (18) according to claims 16 or 17, characterized in that connecting elements (38) of the force carriers (22) form the force transmission sections.