WO2019001859A1

WO2019001859A1 - Drive system

Info

Publication number: WO2019001859A1
Application number: PCT/EP2018/063818
Authority: WO
Inventors: Bernd Siemsen; Torsten Kind; Stefan Eckert; Stefan Steinmann
Original assignee: Volkswagen Aktiengesellschaft
Priority date: 2017-06-26
Filing date: 2018-05-25
Publication date: 2019-01-03
Also published as: DE102017210707A1

Abstract

The invention relates to a drive system for a movably mounted vehicle part, in particular a tailgate, comprising a controllable, electric drive motor, and a telescopic support having at least two telescoping elements, wherein said telescopic support is or can be fastened at one end to a vehicle body and at the other end to the vehicle part. According to the invention, the drive motor is integrated in the telescopic support in the form of a linear drive.

Description

description

drive system

The invention relates to a drive system for a movably mounted vehicle part,

in particular a tailgate, with a controllable, electric drive motor, and with at least two telescoping telescoping elements having telescopic support, which is fastened or fastened at one end to a vehicle body and the other part of the vehicle part.

Drive systems of the type mentioned are already known from the prior art. For example, published patent application DE 10 2009 001 667 A1 discloses a drive system for a movably mounted vehicle part, in particular a tailgate, wherein the

Drive motor is designed as a a rotary electric motor having cable drive. In addition, such drive systems are known, which have a drive motor, which are designed as a spindle drive or hydraulic drive. A disadvantage of such conventional drive systems is that they are expensive, loud and / or of poor quality during operation.

The object of the invention is therefore to provide a drive system which is improved with respect to the mentioned disadvantages.

To achieve the object it is provided that the drive motor of the drive system is integrated as a linear drive in the telescopic support. Thus are advantageously the

Development costs, which reduces disturbing acoustics and component complexity. Particularly advantageous in the drive system according to the invention is that a transmission and additional sensors omitted. Preferably, one of the telescopic elements is single ended to the

Vehicle body and another telescopic element of at least two

telescoping telescopic elements with another end, which is preferably arranged at a distance - along the central axis - to the first end, on the

Vehicle part attached or fastened. By nesting the two

Telescopic elements, a distance between the first end and the second end is changed, in particular reduced. By pulling apart or pushing apart this distance is also changed, in particular increased. Thus, the vehicle part - in fastened state of the telescopic support on the vehicle part and on the vehicle body - moves relative to the vehicle body, in particular displaced, rotated and / or pivoted.

The telescopic support preferably has a detent, so that the telescoping telescoping elements can be moved relative to each other only by overcoming a detent resistance. This detent is preferably provided by a latching device. Alternatively or additionally, the linear drive is set up in such a way that it allows latching of the telescopic elements. The linear drive is preferably designed as a linear stepper motor, so that a detent is given in particular in steps of the linear stepping motor. Preferably, the detent engages only when the linear actuator is driven. Thus, a simple adjustment of the telescopic support is guaranteed in case of failure of control systems, so that the vehicle part is also manually movable in case of failure of the control systems. Alternatively, the detent engages even in case of failure of the control systems, so that the

Telescopic support the vehicle part continues to support, thus preventing it in particular from unwanted movement. The detent is preferably hydraulically, mechanically and / or magnetically, in particular electromagnetically, whereby in particular the

electromagnetic detent is provided by the linear drive.

According to one embodiment of the invention, it is provided that a first of the

Telescope elements is designed as a telescopic sleeve, wherein sleeve-fixed in the telescopic sleeve, a stator of the linear drive is arranged, which cooperates with a arranged on a second of the telescopic elements anchor. Thus, a drive system with a low

Obtain component complexity and a required space for installing the drive system is low. A telescopic sleeve is understood to mean a housing which is set up to receive the second telescopic element and preferably to guide it. Particularly preferably, the telescopic sleeve has a cylindrical shape and a longitudinal central axis, wherein the second telescopic element is guided along the longitudinal central axis of the telescopic sleeve when telescoping. For this purpose, the second telescopic element penetrates via an end opening of the telescopic sleeve in the telescopic sleeve and is at least partially, in particular completely absorbed by the latter in the inserted state. Advantageously, the telescopic sleeve also serves as a protective element to protect the stator disposed therein from mechanical effects and / or contamination. Under a stator is here understood a part of the linear drive, which is fixed in the sleeve, so sleeve-proof arranged. Preferably, the stator is fixed or fastened at least translationally fixed to the vehicle body. Under an anchor is understood here to be a movably mounted to the stator part of the linear drive. By electrical control of the linear drive is so moved the movably mounted armature relative to the stator, so that the two

Slide telescopic elements into one another or push them apart. Preferably, the stator has a plurality of stator elements and the armature has a plurality of armature elements. Preferably, each of the plurality of stator elements is formed as a permanent magnet and each of the plurality of armature elements as an electromagnet, in particular electrical coil formed. Alternatively, each of the plurality of stator elements is designed as an electromagnet, in particular electrical coil, and each of the armature elements as a permanent magnet. The plurality of stator elements are preferably arranged adjacent to the longitudinal center axis in the telescopic sleeve, wherein at least two adjacent stator elements, but preferably all adjacent stator elements, opposite to each other are magnetically polarized or polarizable. In particular, in the case of electromagnets, two adjacent electromagnets are arranged, oppositely oriented magnetic

Form polarizations when they are driven, in particular electrically contacted. Analogously, all anchor elements along the

Longitudinal axis arranged adjacent to the second of the telescopic elements. At least two of the adjacently arranged anchor elements, preferably all directly

adjacent armature elements, have oppositely oriented magnetic polarizations or are adapted to form oppositely oriented magnetic polarizations.

According to one embodiment of the invention it is provided that the second telescopic element is designed as a telescopic rod. Thus, the second telescopic element is of particularly low component complexity and very stable. In addition, in particular a power transmission in the direction of a longitudinal axis of the telescopic rod is very efficient.

According to one embodiment of the invention it is provided that in the telescopic sleeve at least one biased / vorspannbares spring element is arranged, which acts between the two telescopic elements in the sliding direction. The spring element is preferably attached - on one side - to one of two ends of the first telescopic element and - on the other side - to one of two ends of the second telescopic element. In this case, the spring element is designed as a pressure and / or tension spring, so act at a maximum and / or minimum displacement of the two telescopic elements to each other spring forces on the telescopic elements. Thus, a maximum or minimum displacement is preferably damped and reduces the mechanical stress of the telescopic elements. Alternatively or additionally, the spring element is arranged and designed such that in the telescoped state of the telescopic elements, a spring force between the

Telescopic elements acting in the sliding direction, which is less than or equal to a force which is necessary to move the movably mounted vehicle part. Thus, a pre-load is provided by the spring element, which supports the linear drive and reduces the energy requirement of the linear drive.

Under a sliding direction is understood here a direction in which the

Telescope elements are pushed into one another and / or pushed apart. Preferably, the sliding direction is parallel to a longitudinal center axis of the first telescopic element and / or the second telescopic element.

According to one embodiment of the invention, it is preferably provided that at least one controllable Reibbremseinrichtung for the telescopic rod is arranged in the telescopic sleeve. By means of such Reibbremseinrichtung the displacement of the telescopic elements to each other and thus the movement of the movably mounted vehicle part is braked and thus increases safety, since unwanted movements are prevented. According to a development of the invention, provision is made in particular for the friction brake device to be electrically actuatable / actuatable. By means of an electrical control of

Reibbremseinrichtung the friction brake is controlled very quickly and the safety is further increased. Such Reibbremseinrichtung preferably has a permanent magnet, which is connected via a spring to an electromagnet, so that by means of an electrical control of the electromagnet an attractive force and / or repulsive force between the permanent magnet and electromagnet acts and thus a frictional force between the friction brake device and one of the telescopic elements, in particular the second telescopic element, is controlled by the variation of the contact pressure of the Reibbremseinrichtung to the second telescopic element.

According to a preferred embodiment of the invention it is provided that the

Friction brake device is energized activated or de-energized deactivated. If the friction brake device is energized, this has the advantage that the movably mounted vehicle part is further braked in the event of a failure of the control systems and thus the

Safety is increased. Alternatively, however, it is provided that the friction brake device is designed to be de-energized, so that the movably mounted vehicle part can be moved manually in a de-energized state of the friction brake device, in particular in the event of a failure of control systems. According to one embodiment of the invention, it is provided that the stator extends at least substantially along the entire telescopic sleeve, as already mentioned above. Advantageously, the two telescopic elements can be pushed so far apart and especially far apart. According to one embodiment of the invention is provided, as already mentioned above, that the actuator and / or the stator can be energized. This results in the already mentioned advantages.

According to one embodiment of the invention, it is provided that the linear drive

is formed axisymmetric, so that a first stator and a first stator associated with, first anchor member - with respect to a Mitteilachse, in particular with respect to the telescopic rod, in particular with respect to the longitudinal center axis of the telescopic rod - diametrically opposite a second stator and a second stator associated second anchor portion. Thus, radial forces are minimized and an axial force effect is particularly efficient. Preferably, further stator parts and associated anchor parts

provided which are arranged at an angle about the central axis twisted to the first stator part and the first anchor part. Thus can be applied by the linear drive

Displacement forces increased.

The object is also achieved by, according to claim 1 1, a vehicle, in particular a motor vehicle, with a body and a vehicle body movably mounted on the vehicle part and with a drive system which a controllable, electric drive motor and at least two telescoping telescopic elements having telescopic support is created. It is provided that the telescopic support is fastened at one end to the body of the vehicle and the other end to the movably mounted vehicle part. The vehicle is characterized in that the drive system is designed according to the invention. For such a vehicle, there are the advantages which have already been mentioned above in connection with the drive system.

According to one embodiment of the invention, it is provided that the movably mounted vehicle part a tailgate, a door, a window, a sunroof, a seat, a part of a seat, in particular a backrest or a seat, a glove box flap, a

Gas cap or a cup holder is. Again, there are the advantages already mentioned above. In particular, the present invention reduces disturbing acoustics when moving movably mounted vehicle parts. In addition, the component complexity and reduces the manufacturing cost of such a drive system and such a vehicle.

In the following the invention will be explained in more detail with reference to the drawing. In addition shows

Figure 1 shows a vehicle with an advantageous drive system and

Figure 2 shows an embodiment of the drive system in a simplified

Longitudinal view.

Figure 1 shows a simplified side view of the rear portion of a vehicle 27. The vehicle 27 has a body 26 on which a vehicle part 25, in the present case in the form of a tailgate of the vehicle 27, is movably mounted. The flap is pivotable from a rear opening releasing position, as shown in Figure 1, in a position closing the opening. For pivoting the vehicle part 25, a drive system 1 is provided, through which the movement of the tailgate is effected.

This drive system 1 will be explained in more detail below with reference to FIG.

FIG. 2 shows in a simplified longitudinal sectional view of the drive system 1. The drive system 1 has a controllable, electric drive motor 2 and a

Telescopic support 3 on. The telescopic support 3 in turn has two telescoping telescopic elements 4, 5, ie a first telescopic element 4 and a second telescopic element 5, on. The telescopic support 3 is attached at one end to the vehicle part 25 via one of its ends 6 on a vehicle body 26 and at the other end via another of its ends 6. As shown in Figure 2, the drive motor 2 is integrated as a linear drive 7 in the telescopic support 3.

The first telescopic element 4 is designed here as a telescopic sleeve 8. In the telescopic sleeve 8, a stator 9 of the linear drive 7 is arranged. This stator 9 cooperates with an armature 10, so that in particular a movement in the direction of the longitudinal center axis M of the telescopic sleeve is executable. The armature 10 is here on the second telescopic element 5, which is designed as a telescopic rod 1 1, arranged.

As can also be seen in Figure 1, in the telescopic sleeve 8, a spring element 12, which is designed here as a compression spring, arranged, which at one end - in the figure left - on the first telescopic element 4 and at another end - in the figure right - Is attached to the second telescopic element 5. The spring element 12 is thus between the two Telescopic elements 4, 5, in particular between two ends of the telescopic elements 4, 5, arranged and preferably biased to pressure.

The spring element 12 is arranged in the telescopic sleeve 8 such that one of the

Spring element 12 outgoing spring force in the sliding direction S, so here in the direction of the longitudinal center axis M acts. With a displacement of the telescopic elements 4, 5 relative

to each other, the second telescopic element 5 is guided through an opening 13 in the cylindrical telescopic sleeve 8.

The stator 9 here has two diametrically opposite stator parts 14, 15 with respect to the longitudinal central axis. Each of the stator parts 14, 15 also has a plurality

Stator elements 16, here in each case eight stator elements 16, on. For the sake of clarity, only one of the stator elements 16 is marked with a reference symbol here. Good to see is that the stator elements along the longitudinal center axis M are arranged adjacent to each other, and that in each case two mutually directly adjacent stator elements 16 to each other

have opposite, magnetic polarizations. The stator elements 16 are here in particular designed as permanent magnets, wherein the poles of the respective

Permanent magnets are aligned radially on the longitudinal center axis M or facing away from the longitudinal center axis in the radial direction.

Also, the anchor has several, here two anchor parts 17, 18. Each of the anchor parts 17, 18 here has two anchor elements 19. For the sake of clarity, only one of the four illustrated anchor elements 19 is provided with a reference number. The anchor elements are here each formed as electrical coils, the coil axis are each aligned radially from the longitudinal center axis M of the telescopic sleeve 8, starting on the radially outer stator parts 14, 15.

The anchor elements 19 have a distance - along the longitudinal center axis M - to each other, which is not equal to the distance of the stator elements 16 - along the longitudinal center axis M - to each other, is. The distance between two anchor elements 19 of an anchor part 17, 18 here corresponds in particular exactly one and a half times the distance of two directly

adjacent stator elements 16 of a stator 14, 15. Thus, the armature 10 is particularly reliable feasible through the telescopic sleeve 8 and the driving forces, which by the

Cooperation of the stator 9 are effected with the armature 10, do not cancel against each other. Furthermore, an optional friction brake device 20 is shown in FIG. 1, which has two axially symmetrically arranged, diametrically opposed friction brake parts 21. Each of the Reibbremseinnchtungsteile 21 has a permanent magnet 22, a spring element 23 and an electromagnet 24, which are each provided here only for one of Reibbremseinnchtungsteile 21 with a reference numeral. By controlling the electromagnet, a magnetic force acts between the electromagnet 24 and the permanent magnet 22 fixedly arranged at least in the radial direction, which in combination with a spring force of the spring element 23 causes a resultant force in the radial direction on the longitudinal center axis M or in the radial direction of the longitudinal center axis M. away, causes. Thus, by electrical control of the Reibbremseinrichtung, in particular the electromagnet 24 of the friction brake device 20, a friction braking effect on the telescopic rod 1 1 can be effected.

LIST OF REFERENCE NUMBERS

drive system

drive motor

telescopic support

telescopic element

The End

linear actuator

telescopic sleeve

stator

10 anchors

1 1 telescopic rod

12 spring element

13 opening

14 stator part

15 stator part

16 stator element

17 anchor part

18 anchor part

19 anchor element

20 Reibbremseinrichtung

21 Reibbremseinrichtungsteile

22 permanent magnet

23 spring element

24 electromagnet

25 vehicle part

26 vehicle body

27 vehicle

M longitudinal central axis

S sliding direction

Claims

claims

1. drive system (1) for a movably mounted vehicle part (25), in particular

Tailgate, with a controllable, electric drive motor (2), and with at least two telescoping telescopic elements (4,5) having

Telescopic support (3), which is at one end to a vehicle body (26) and the other end to the vehicle part (25) attached or fastened, characterized in that the drive motor (2) as a linear drive (7) in the telescopic support (3) is integrated.

2. Drive system according to claim 1, characterized in that a first of

Telescope elements (4) as a telescopic sleeve (8) is formed, wherein in the telescopic sleeve (8) sleeve fixed a stator (9) of the linear drive (2) is arranged, which cooperates with a at a second of the telescopic elements (5) arranged armature (10) ,

3. Drive system according to one of the preceding claims, characterized in that the second telescopic element (5) is designed as a telescopic rod (1 1).

4. Drive system according to one of the preceding claims, characterized in that in the telescopic sleeve (8) at least one biased / vorspannbares

Spring element (12) is arranged, which acts between the two telescopic elements (4, 5) in the sliding direction.

5. Drive system according to one of the preceding claims, characterized in that in the telescopic sleeve (8) at least one controllable Reibbremseinrichtung (20) for the telescopic rod (1 1) is arranged.

6. Drive system according to one of the preceding claims, characterized in that the Reibbremseinrichtung (20) is electrically actuated / actuated.

7. Drive system according to one of the preceding claims, characterized in that the Reibbremseinrichtung (20) is energized activated or de-energized disabled formed.

8. Drive system according to one of the preceding claims, characterized in that the stator (9) at least substantially along the entire

Telescopic sleeve (8) extends.

9. Drive system according to one of the preceding claims, characterized in that the armature (10) and / or the stator (9) can be energized.

10. Drive system according to one of the preceding claims, characterized in that the linear drive (7) is formed axisymmetric, so that a first stator (14) and a first stator (14) associated, first anchor member (17) - with respect to a central axis (M ), in particular with respect to the telescopic rod (1 1) - diametrically opposed to a second stator part (15) and a second stator part associated with the second anchor member (18).

1 1. vehicle (27), in particular motor vehicle, with a body (26) and with at least one on the body (26) movably mounted vehicle part (25) and with a drive system (1) having a controllable, electric drive motor (2) and a telescopic support (3) having at least two telescoping telescopic elements (4, 5), wherein the telescopic support (3) is fastened at one end to the body (26) of the vehicle (27) and at the other end to the movably mounted vehicle part (25) in that the drive system (1) is designed according to one of claims 1 to 10.

12. Vehicle (27) according to claim 1 1, characterized in that the movable

mounted vehicle part (25) a tailgate, a door, a window, a sunroof, a seat, a part of a seat, in particular a backrest or a seat, a

Glove box flap, a gas cap or a cup holder is.