EP0902146A1 - Driving device for a closure of an opening in a motor vehicle - Google Patents

Abstract

First (4) and second (5) hydraulic piston-cylinder units are connected by lines (14,15) to a pump (17) for supplying and draining hydraulic fluid. Each unit comprises a cylinder body (6,10) with a working space (7,11), sealed at each end respectively by displaceable pistons (8,12; 9,13). Compressive force transmitting medium (30) is provided between pistons (8,12) of the two units, comprising a coupling member (23) for coupling the roof to the medium.

Description

The present invention relates to a Drive device for moving, in particular for Translation, a cover for an opening in the body of a motor vehicle, according to the preamble of claim 1. In a preferred embodiment, the present invention on driving a roof with pushing and / or folding plates in the fixed Roof of a motor vehicle, but the drive device is also for driving a trunk lid, tonneau covers or the hood of a motor vehicle applicable.

Such motor-driven sunroofs and For example, folding roofs for passenger cars from European patents EP 0 494 356 and EP 0 368 404 and known from DE 195 27 746.

EP 0 494 356, on which the preamble of claim 1 is based, shows a drive device that consists of a compact low voltage electric motor with a rotatable Output shaft is made up of a mechanical Power transmission with parallel sliding Compressive force-transmitting means is coupled, via a associated clutch assembly with the parallel to moving part of the folding roof are connected. At this known drive device is on the Output shaft of the motor a reduction gear arranged with which a rack is displaced, the again with push-pull cables or Bowden cables, which form the compressive force transmitting means is.

In practice, these known drives prove to be susceptible to failure and wear, the limitation of Quality of the parts used by the permissible Cost price of such a drive in a motor vehicle matters.

The present invention has for its object a To create drive device, which in particular as Drive for moving one or more parts of one as Sliding or tilting roof made of an opening in the fixed roof of a motor vehicle is suitable.

The present invention provides for this Drive device according to claim 1.

Fig. 1

schematisch und perspektivisch ein Fahrzeugdach mit einer von einer Schiebedachplatte abschließbaren Öffnung und ein erstes Ausführungsbeispiel der erfindungsgemäßen Antriebseinrichtung zum Versetzen der Schiebedachplatte zwischen einem geöffneten und einem geschlossenen Stand,

Fig. 2

schematisch die Antriebseinrichtung der Fig. 1,

Fig. 3a

eine Ausschnittsvergrößerung des Details A der Fig. 1,

Fig. 3b

ein Kupplungsorgan des Details der Fig. 3a,

Fig. 4

schematisch ein zweites Ausführungsbeispiel der erfindungsgemäßen Antriebseinrichtung,

Fig. 5

schematisch ein drittes Ausführungsbeipiel der erfindungsgemäßen Antriebseinrichtung,

Fig. 6

schematisch eine Antriebseinrichtung gemäß dem Stand der Technik,

Fig. 7

schematisch ein Ausführungsbeispiel des Details A in Figur 6, und

Fig. 8

schematisch einen Querschnitt durch die Figur 7.

Different exemplary embodiments of the drive device according to the invention are described in the accompanying claims and are explained in more detail below with reference to the drawing. The drawing shows:

Fig. 1

schematically and in perspective a vehicle roof with an opening lockable by a sliding roof panel and a first embodiment of the drive device according to the invention for moving the sliding roof panel between an open and a closed position,

Fig. 2

schematically the drive device of FIG. 1,

Fig. 3a

2 shows an enlarged detail of detail A in FIG. 1,

Fig. 3b

a coupling member of the detail of Fig. 3a,

Fig. 4

schematically a second embodiment of the drive device according to the invention,

Fig. 5

schematically a third exemplary embodiment of the drive device according to the invention,

Fig. 6

schematically a drive device according to the prior art,

Fig. 7

schematically an embodiment of the detail A in Figure 6, and

Fig. 8

schematically shows a cross section through FIG. 7.

In Figure 1, part of the fixed roof 1 is one Motor vehicle, especially a passenger car, visible, with an opening in it, which is rectangular here is and is indicated by dashed lines in Figure 1 and in usually located above the front seats of the car. The opening 2 can be described by a Sunroof device can be opened or closed.

In this example, the sunroof device comprises one Plate 3, which is between a closed stand in which the Plate 3 covered the opening 2, and one to the rear lying open stand, in which the opening 2 partially or is completely released, can be moved in parallel.

To move the plate 3 is a hydraulic Drive device provided, which is based on the Schemes will be explained.

The drive device comprises a first hydraulic one Piston / cylinder unit 4, for example along the Front edge of the opening 2 is arranged in the roof 1, and a second hydraulic piston / cylinder unit 5, which for Example at a distance behind the rear edge of opening 2 is arranged in the roof 1. The piston / cylinder units 4, 5 have a small cross section, so that they inconspicuously placed under, or in the fixed roof can.

The first piston / cylinder unit 4 has a cylinder body 6 with a usable space 7, which at one end of one slidable first piston 8 and at the other end of an equally displaceable second piston 9 is completed.

The second piston / cylinder unit 5 has a cylinder body 10 with a usable space 11, which at one end of a slidable first piston 12, and at the other end of an equally displaceable second piston 13 is completed.

These are for the supply and discharge of hydraulic fluid Piston / cylinder units 4, 5 each with a single one Connection for a hydraulic line, or 14, 15 provided. These connections 14, 15 are located approximately here in the middle of the units, each in one place, the not from the pistons of the relevant piston / cylinder unit is covered. A line connects to connection 14, which to connect a reversible electrical driven pump 17 leads. To the other connection of the Pump 17 connects a line 18 to the connection 15 leads. In Figure 1 it is indicated that the lines 16 and 18 are installed under the inner lining of the roof 1 and along a roof stand 19 in the engine compartment of the vehicle to lead. The pump 17 can also be in the back of the vehicle Example may be arranged in the trunk.

The flexible lines 16, 18, and the pump 17 and Utility rooms 7 and 11 are with hydraulic fluid, especially hydraulic oil. In particular, can be provided, the connections of the piston / cylinder units and the hydraulic lines to be connected to it Quick couplings with an internal shut-off device too provided so that the utility rooms 6, 11, and the lines 16, 18 and the pump 17 already during manufacture hydraulic fluid can be filled and at the Assembly can be connected to the vehicle, the Shut-off devices to be connected by both Quick coupling parts are opened. Can also be provided be, the lines firmly on the piston / cylinder units to be arranged and connected to the pump via quick couplings connect.

The effective cross section of the usable space 7 is the same effective cross section of the usable space 11, so that no separate container for hydraulic fluid required is, and the pump 17, depending on the drive direction of the associated electric motor, the liquid from one of the sucks two useful spaces 7, 11 and to the other useful space pumps. To accommodate the expansion of the hydraulic Liquid when heated and to maintain the hydraulic pressure in the utility rooms can possibly a hydraulic accumulator may be provided.

Between the first piston 8 and the first Piston / cylinder unit 4 and the first piston 12 of the second piston / cylinder unit 5 is a substantially U-shaped Guide rail 21 for the first pressure-transmitting Means are provided, and between the second piston 9 first piston / cylinder unit 4 and the second piston 13 the second piston / cylinder unit 5 is a essential U-shaped guide rail 22 for second pressure-transmitting means provided. The Guide rails 21, 22 form with the Piston / cylinder units 4, 5 one essentially rectangular frame, the piston / cylinder units 4, 5 lie on the opposite side of the frame. The frame has such dimensions that it is around the opening 2 in the Vehicle body lays.

Each guide rail 21, 22 is here a U-shaped curve Pipe with an inner axial cavity therein extends between both axial ends of the guide rail. The bent ends of each guide rail 21, 22 form the cylinder body of the first and second Piston / cylinder unit 4, 5.

In this example, the cavity is in each guide rail 21, 22 with a number of axially opposed Roller elements 30, in this example balls 30, replenished. The outer balls 30 lie on the adjacent one Pistons of a piston / cylinder unit 4, 5. Each Guide rail 21, 22 has a longitudinal groove or 31, 32 provided by an associated coupling member 23, 24th for the plate 3. Each coupling member 23, 24 is between two roller elements 30. Preferably the coupling elements 23, 24, as shown in FIG. 3b, plate-shaped, with one on both sides Indentation into which the coupling element 23, 24 adjacent roller element 30 falls into it, so that Coupling element 23, 24 not from the guide rail 25, 28 can be pulled out.

An in. Belongs to each of the pressure-transmitting means Figures 3a and 3b, for example, indicated schematically Coupling member, or 23, 24, the coupling with the plate 3 realized. These coupling members 23, 24 do not need attack directly on the plate 3, but will usually on a slider or an array of attack sliding elements that are slidable in one Associated guide rail that is firmly attached to the fixed roof 1 is arranged, is guided. The slider is then in turn connected to plate 3 as in the field of sunroofs and folding roofs common for vehicles is. This makes it possible, for example, for the plate 3 not only pushes, but moves up and down and / or occupies a tilted stand.

The guide rails 21, 22 shown are preferably made of a metal tube profile made of one or several parts is assembled to the shape shown. Preferably, the cylinder body 6, 10 from this Pipe profile formed, which simplifies the assembly and Saving material and therefore at an affordable price leads. If the guide rails 21, 22 and Cylinder body made of the same metal pipe material are another advantage that the Received rigid whole during transport to the Assembly site, for example the car factory, very easy can be handled, and there continue with the assembly on the Roof of the car can be handled easily.

It is evident that there are no measures to guarantee receipt the mutually correct state of the coupling members 23, 24 are hit. In many applications, this is parallel to sliding plate 3 will be stiff, and will be an additional Guide rail for the plate 3 arranged in the roof 1 be so that the synchronism of the coupling members 23, 24 at Sliding back and forth is guaranteed.

It will be clear that with each guide rail 21, 22nd several coupling members 23, 24 can be provided for Example of several roof tiles with the to couple pressure-transmitting means.

In a preferred embodiment, not shown, of present invention include the compressive force transmitting Not means balls or roller elements, but in itself well-known push-pull cable, probably also as a Bowden cable indicated by the guide rails 21, 22 on their Be held.

The arrangement of loose roller elements 30 is by name advantageous if the guide rails 21, 22 tight bends to have. In combination with roller elements in such Bows can be straight, or more or less straight Divide the guide rails 25, 28 instead of loose Roller elements also one or a few elongated rod elements to be ordered. In particular, it can be provided that the Guide rails 21, 22 made of bent parts of themselves rigid material, namely metal, are composed. In this case it is advantageous that the in the Bar elements arranged in the guide rail are so flexible for example from a suitable (fiber-reinforced) Plastic material that they at least once Bow can pass in the guide rail, so that at the assembly of the drive device, for example, first Rod element inserted into the curved guide rail that can pass through one or more arches and into a straight part arrives, and then several Roller elements that are in an arch of the guide rail arrive. Maybe instead of the roles and Bar elements also an articulated chain, for example one Similar to a bicycle chain, housed in a guide rail become.

Figure 4 shows schematically a variant of Drive device according to FIGS. 1 and 2.

The drive device of Figure 4 comprises two in essentially identical pairs of a first hydraulic piston / cylinder unit 44, which is the Example along the front edge of the opening 2 in the roof 1 sets, and a second hydraulic piston / cylinder unit 45, which is then at a distance behind the rear edge of the Opening 2 in roof 1.

The first piston / cylinder unit 44 has a cylindrical one Cylinder body 46 with a usable space 47 in it one end of a solid bottom and the other end is completed by a displaceable first piston 48.

The second piston / cylinder unit 45 has a cylindrical one Cylinder body 50 with a usable space 51 in it one end from a solid floor, and at the other end is completed by a displaceable first piston 52.

The usable spaces 47, 51 are each with a single one Connection, or 49, 55 provided. Closes at terminal 49 a line leading to a connection one in two Directional and electrically driven pump 57 leads. At the other connection of the pump 57 closes one Line 58 leading to terminal 55. The lines 56, 58, and the pump 57 and the utility rooms 47 and 51 filled with hydraulic fluid.

The effective cross section of the usable space 47 is the same effective cross section of the usable space 51, so that here no separate container for hydraulic fluid required is, and the pump 57, depending on the drive direction of the associated electric motor, the liquid from one of the sucks two useful spaces 7, 11 and to the other useful space pumps.

Between the first piston 48 of the first Piston / cylinder unit 44 and the first piston 52 of the means 59 are provided for the second piston / cylinder unit 45, which in this example are essentially identical to the already described with reference to FIG. 2 pressure-transmitting means and are therefore not closer are explained. Again, instead of the roller element Train-push cable or the like can be used.

It can be seen that the pumps 57 from a single Elektromotr be driven. Because the pumps are identical are and have the same power, the synchronism of the two coupling members 23, 24 guaranteed in principle.

In a modification, not shown, can be provided be that for driving a top of an opening in a vehicle, for example a sliding roof panel, or a tonneau cover, only half of those shown in Figure 4 Drive device is used. For example, the Guide rail 59 in the middle of the vehicle and attacks in the middle on the plate or the barrel cover. Here, the piston / cylinder units can be parallel to the long run of the guide rail 59, so that a kind rectangular configuration is preserved.

Figure 5 shows a drive device with a first hydraulic piston / cylinder unit 60 along here a side surface of the opening 2 in the roof 1 and a second hydraulic piston / cylinder unit 61 which is parallel to the first piston / cylinder unit 60.

The first piston / cylinder unit 60 has a cylindrical one Cylinder body 62 with a usable space 63 in it one end of a solid floor and the other end is completed by a displaceable first piston 64.

The second piston / cylinder unit 61 has a cylindrical one Cylinder body 65 with a usable space 66 in it one end of a solid floor and the other end is completed by a displaceable first piston 67.

The usable spaces 63, 66 are each with a single one Connection, or 68, 69 provided. Closes at connection 68 a line 70 leading to a connection of a double-acting and electrically driven pump 71 leads. At the other connection of the pump 71 closes one Line 72 leading to terminal 69. The lines 70, 72, and the pump 71 and the utility rooms 63 and 66 filled with hydraulic fluid.

The effective cross section of the usable space 63 is the same effective cross section of the usable space 66, so that here no separate container for hydraulic fluid required is, and the pump 71, depending on the drive direction of the associated electric motor, the liquid from one of the sucks two useful spaces 63, 66 and to the other useful space pumps.

Between the first piston 64 of the first Piston / cylinder unit 60 and the first piston 67 of the second piston / cylinder unit 61 compressive force-transmitting means 75 provided what you Structure affects essentially identical to that already described pressure force transmitting means 21, 22 are and therefore be explained in a limited way.

The device comprises a tubular guide rail 76 with one to the first piston / cylinder unit 60 subsequent first strand along a side surface of the with dashed lines indicated roof opening 2, a second Run along the front of opening 2, a third Run back along the side of the opening, one fourth strand, which runs forward again, a fifth Run along the front and a sixth run the side surface of the opening 2 to the second Piston / cylinder unit.

Preferably the cylinder body is either of the two Piston / cylinder units 60, 61 from the tube of the Guide rail 76 made. In the third strand and the sixth strand is a groove in the tubular Guide rail 76 arranged through which one of the Coupling members 23, 24, the plate 3 with the Couple drive device, put through.

It will be clear that the guide rail described is easy to manufacture and has no problems can have an arc-rich course. This enables a big one Freedom to drive in the roof of a Adapt cars to available space. The lines that the Connect the pump to the piston / cylinder units preferably flexible hoses.

Instead of executing the pressure-transmitting means as round balls in a tube, could also be a tube with a not be cylindrical cross section provided for Example with cylindrical rods, or barrel-shaped Elements is filled. You can also use push-pull cables in the Guide rail 76 may be arranged.

The drive device is preferably provided with a Provided protection device that is designed to hydraulic pump when detecting an unsafe Situation, for example moving the sunroof stop when the determined pressure of the hydraulic Liquid exceeds a certain limit.

In the foregoing, the drives are based on driving a sliding roof with a single sliding roof panel have been explained. It will be clear that the drives also for driving other such Roof top designs, such as sliding roofs with several plates are suitable.

A possible application of the described Drive device is in connection with a Sliding roof system, in which the roof opening from one or more rigid plates, which in the Luggage compartment of the motor vehicle are stored.

It will be clear that instead of one or more plates a sliding roof also a folding roof with a flexible Cloth top, or folding panels, or another known vehicle roof top with the described Drive device can be operated.

In a modification, not shown, is on one side of the pressure transmitting means no hydraulic Piston / cylinder unit provided, but an elastic compressible reset mechanism, in a simple Modification a compression spring. The compression spring will then squeezed when hydraulic fluid the hydraulic piston / cylinder unit on the other side the pressure-transmitting means is supplied, for what then only one unidirectional pump is required. For opposite displacement of the with the is connected object it then only required the hydraulic fluid out drain the relevant piston / cylinder unit. The resetting means can also be, for example, one with gas filled piston / cylinder unit. This execution can be described as a drive device comprising a first hydraulic piston / cylinder unit, which piston / cylinder unit has a cylinder body with it has a usable space on at least one End completed by a sliding first piston is, at least one with the usable space communicating connection for the supply and discharge of a hydraulic medium is provided, which Drive device further an elastically compressible Reset device which is fixed to the first Piston / cylinder unit is arranged, and in the case of between the first piston of the first piston / cylinder unit and the Reset device first pressure-transmitting means are provided, which first pressure force transmitting means a coupling member for coupling the to be moved Object with the first pressure-transmitting means include.

The present invention provides in its broader aspect a drive device for moving a convertible top Opening in a vehicle body, especially one Covers such as a folding roof or a sliding roof, comprehensive an electric drive motor with a rotatable one Output shaft, one with the rotatable output shaft connected gear, which gear with at least one back and forth along an associated guide rail moving drive cable is attacking which one Drive cable can be coupled to the hood, which Drive device is characterized in that the Drive device further selectively operable hydraulic drive means for driving the at least includes a drive cable.

DE 195 27 746 is a drive device for a Roof cover with two drive cables, in particular Drive cables with a spiral profile, for Example of metal or plastic, shown which cables back and forth in an associated guide tube are mobile. The drive cables each grip theirs one end on one side surface of the convertible top and lie along the front or back of the opening for that Convertible tops in parallel. In the place of one common electric motor driven gears are the Guide tubes interrupted, each teeth Gear with the associated cable are attacked. Instead of two individual gears, it is also known, the two To drive cables with a common gear.

To put the convertible top in the closed position, the last part of the closing movement often exerted a force which is considerably greater than the force required for Moving the convertible top in the remaining movement distance is needed. This is due to the fact that between the body and the top and / or between the Elements that make up the roof, usually flexible sealing strips, or the like Sealing strips are provided to be reliable to be sealed, pressed together with force. Can continue the hood or parts thereof are made of fabric which in the last part of the closing movement must be tightened.

To the desired in the last part of the closing movement Delivering clamping force should be the well known Drive device with a heavy electric motor run, which is undesirably expensive and takes up too much space at the same time, or should it Gear ratio between the electric motor and the Gear adjustable, which is also unacceptably complex and is expensive.

The present invention solves this problem by adding the electrical drive of the or the cable (s) hydraulic drive provided for the or the cables is. This hydraulic drive is preferably for Driving the or the cable (s) over part of the maximum reciprocation of the cable (s) designed in which part that, or the cable a larger Force on the top than in the rest of the Have to exercise movement distance. This can be provided be that the, or the cables at the moment both of the Electric motor, as well as the hydraulic drive are driven. This solution is particularly interesting if there is already a hydraulic one in the vehicle Pump unit is provided for other functions, such as that Moving a lid for the accommodation space in the the convertible top is housed in the open state.

A preferred embodiment of the above The concept of the invention is described below with reference to FIGS. 6-8 are explained.

Figure 6 shows a drive device for another illustrated hood of an opening in a vehicle roof, which drive device is known per se, for example from DE 195 27 746. This drive device comprises an electric drive motor 1 with a rotating one Output shaft, via a gear 2 with a fixed Gear ratio, a gear 3 drives. The gear 3 is, as is known per se, in engagement with Drive cables 4, 5, which can be moved back and forth in associated guide tubes 6, 7 are guided. For this are the guide tubes 6, 7 in the housing 8, in which the gear 3 is arranged, interrupted. The drive cables 4, 5 are preferably of the type with a spiral profile on the Outside. The drive cables 4, 5 are not in shown way with the opposing Side surfaces of the convertible top connected. This hood can for example from the cloth of a suitable fabric, such as Example known from the Citroën 2CV. Could also the top made of one or more slats of a rigid Material exist.

The electric motor 1 with the associated gear 2 and Gear 3 are designed so that the opening in the roof opened at a desired speed and can be closed. As mentioned in the last Part of the closing movement on a significantly larger force the convertible top can be exercised, for example, around the fabric tension and / or compress a seal. Of the electric drive is unable to handle this greater force to deliver. There is an additional one in the invention hydraulic drive provided that the cables 4, 5, possibly together with the electric drive, in this drives last route. The invention provides that at "A" in Figure 6, such a hydraulic drive is arranged, which in Figures 7, 8 as Example training is shown. The fact that at "A ' Cable 5 is driven, it is achieved that the cable 4 can deliver more power. As an alternative, the additional hydraulic drive at the location of the housing 8 be arranged and selectively drive the gear 3.

A housing 10 can be seen in FIGS. 7 and 8 that the cable 5 runs through and partially from the Guide tube is exposed. On the spiral profile of the Cable 5 engages a gear 11 that rotates freely a shaft 12 mounted in the housing.

A hydraulic actuator 14 can also be seen for selectively moving a pin 15 with a spiral profile, according to the profile of the cable 5, serves between a state in which the pin 15 is engaged outside with the gear 11 and a state in which the pin 15th and the gear 11 are engaged and by moving the Pin 15, the gear 11 is driven. The actuator 14 is like having a single-acting linear cylinder Spring return executed and includes a cylinder housing 16 with one on the side of the gear 11 from the Cylinder housing protruding piston rod 17. A Return spring 18 presses the piston rod 16 in their inserted position. The actuator 14 has a connection 19th for a hydraulic fluid line 20.

The operation of the drive device described is as follows: With the from the open stand in the closed position The convertible top is moved over the most of the displacement distance only the electric motor 1 used. Here, the actuator 14 is not actuated and rotates the gear 11 freely with the movement of the cable 5. If it is found in any way that the top has reached the last part of the closure section hydraulic fluid is supplied to the actuator 14. As a result, the pin 15 pushes out and comes into play with the gear 11, which is then by the pressure of the hydraulic fluid against the piston rod 17 is driven. As a result, the electric motor 1 remains preferably also in operation, especially if the electric drive is self-braking as usual is. By the additional supplied by the actuator 14 Driving force, the cable 5 can exert a large force on the Exercise convertible top. At the same time, the cable 4 becomes a large one Exercised strength. It is noted that such cables in generally both a compressive force and a tensile force can deliver.

The detection of reaching the last closing phase can for example with a position transmitter or via detection the current consumed by the electric motor 1 become.

The stroke of the piston rod 17 can be small for this application in practice, about 10-30 millimeters will be sufficient.

When the roof is opened, the hydraulic fluid runs out the actuator 14 flow out by the cable 5 now Gear 11 drives, and thereby the pin 15 inserted becomes. The spring 18 then brings the pin 15 outside of the Meshing with the gear 11.

Possibly an actuatable hydraulic valve be provided that the flow away from hydraulic Can selectively prevent fluid from the actuator, so that the hydraulic fluid in the roof closed stand blocked, for example as a fuse against theft in the event of theft.

It will be clear that the hydraulic actuator too can be executed differently, and that others are selective actuatable coupling means between the actuator and the or the cable (s) are arranged around the or the cable to selectively couple with the or the cable (s).

At the same time, the additional drive can also be used as a support the cable drive during other moments of movement of the Tops are used, for example during opening, when a large "release force" is required.

It will be clear that the figures 6-8 described hydraulic support of the drive cable also in other applications where an object must be moved by means of such a cable drive, is advantageous, especially when it comes to translation a roof for an opening, not only in roofs of Motor vehicles, but also for windows, doors, Trunk lid, hoods, chair drives, and also for Example in buildings.

Claims (14)

Drive device for displacing a top of an opening in a vehicle body, in particular a roof top, such as a folding roof or a sliding roof, comprising a drive motor with a rotatable output shaft, transmission means connected to the output shaft, the transmission means rotating the output shaft into translation from an associated guide rail implement assisted pressure-transmitting means which are connected to a coupling member for coupling the convertible top to the pressure-transmitting means, characterized in that the transmission means comprise a hydraulic pump, as well as a first hydraulic piston / cylinder unit and a second hydraulic piston / cylinder unit, which piston / cylinder units are connected to the pump via hydraulic lines, each piston / cylinder unit having a cylinder body with a useful space therein, de r is terminated at least at one end by a displaceable first piston, at least one connection communicating with the useful space being provided for a hydraulic line for supplying and discharging a hydraulic medium, and wherein between the first piston of the first piston / cylinder unit and the First pistons of the second piston / cylinder unit are provided with first compressive force-transmitting means with an associated first coupling element for coupling with the convertible top. Drive device according to claim 1, wherein the effective cross sections of the usable space of the first and the second piston / cylinder unit are the same, and in which the first and the second piston / cylinder unit one each have a single connection for a hydraulic line and a single hydraulic line is provided which connects the connections with each other, with the pump a Pump with two delivery directions is the only one Line is arranged. Drive device according to claim 1 or 2, wherein the first piston / cylinder unit and the second Piston / cylinder unit on each of the first End facing away from the piston further a second displaceable Have pistons, and the one between the second piston first piston / cylinder unit and the second piston second piston / cylinder unit second pressure transmitting Means are provided, which second pressure-transmitting Means with a second coupling member for coupling the moving roof with the pressure transmitting Funds are connected. Drive device according to claim 3, in which to first and the second pressure-transmitting means associated guide rails are each substantially U-shaped and the first piston / cylinder unit and the second Piston / cylinder unit with one another in one connect the essential rectangular frame together. Drive device according to one or more of the previous claims, in which to the pressure-transmitting means associated guide rail is a tubular profile that is connected to each of its ends with a Piston / cylinder unit is connected. Drive device according to one or more of the preceding claims, in which the to pressure-transmitting means belonging to the guide rail Pipe profile is which pipe profile is also the Forms the cylinder body of the piston / cylinder units. Drive device according to claim 2, wherein the Drive device for driving the top two pairs a first and a second hydraulic Piston / cylinder unit comprises, in which the usable space each piston / cylinder unit from the associated one sliding piston and a fixed bottom is limited and in which the useful spaces of the piston / cylinder units are one Pair of a single hydraulic guide rail, in a pump with two delivery directions is arranged, are interconnected. Drive device according to claim 7, wherein the reversible pumps of the two pairs with a common Motor for driving the pumps are provided. Drive device according to one or more of the preceding claims, wherein the drive means for mounting in a motor vehicle from a pump part, the at least one electric output motor for the hydraulic pump and the hydraulic pump includes, and a convertible top actuating part that at least the Piston / cylinder units and the pressure force transmitting Includes means, as well as the associated guide rails, is composed, which is essentially as flexible Hoses made hydraulic lines firmly on the Pump part or arranged on the convertible top actuating part and with a quick connector to the other part assembly can be coupled in the motor vehicle. Drive device according to claim 9, wherein each Quick coupling two can be coupled together Has quick coupling parts, being in each Quick coupling part a shut-off device is arranged, those in the uncoupled state of the quick coupling parts is closed and is open in the coupled state, the pump part, the convertible top actuating part and the hydraulic lines of both parts with hydraulic Liquid are filled. Convertible top device for covering an opening in a vehicle body, in particular for an opening in the roof of a vehicle, comprising at least one cover element that is displaceable in parallel between a closed position in which the cover element closes the opening and an open position lying essentially parallel to the closed position Stand, in which the opening is at least partially released, and a drive device for moving the cover element between the open stand and the closed stand, characterized in that the drive device is designed according to one or more of the preceding claims. Vehicle roof, comprising a roof opening and at least one cover element which is displaceable in parallel between a closed stand in which the roof opening is closed and an open stand which is substantially parallel to the closed stand and in which the opening is at least partially released, and one Drive device for moving the cover element between the open position and the closed position, characterized in that the drive device is designed according to one or more of the preceding claims. Provided with a cover device according to claim 11 Motor vehicle. Provided with a vehicle roof according to claim 12 Motor vehicle in which the motor for driving the hydraulic pump and the pump outside the Passenger compartment of the vehicle, preferably in the Trunk, or in the room for the internal combustion engine of the Vehicle are arranged, and the hydraulic lines include flexible hoses to the piston / cylinder units.

Images