CN112814519B

CN112814519B - Motor vehicle door drive, in particular motor vehicle sliding door drive

Info

Publication number: CN112814519B
Application number: CN202011293383.8A
Authority: CN
Inventors: J·诺瓦克; S·戈尔德曼; M·伯姆
Original assignee: Kiekert AG
Current assignee: Kiekert AG
Priority date: 2019-11-18
Filing date: 2020-11-18
Publication date: 2024-03-08
Anticipated expiration: 2040-11-18
Also published as: EP3822444A1; CN112814519A; DE102019131053A1

Abstract

The invention relates to a motor vehicle door drive, in particular a motor vehicle sliding door drive, comprising a door leaf (3) that can be moved back and forth relative to a vehicle body (6), and comprising a drive unit (4) and a holding device (5) for the door leaf (3) that interacts with the drive unit (4), wherein the drive unit (4) comprises a motor (7), an output shaft of the motor (7), a transmission (8, 9) and a guide roller (10) for at least one flexible transmission (2). According to the invention, the holding device (5) has a holding rod (12) which is provided for engaging with and locking the output shaft of the motor (7) for holding the door leaf (3).

Description

Motor vehicle door drive, in particular motor vehicle sliding door drive

Technical Field

The invention relates to a motor vehicle door drive, in particular a motor vehicle sliding door drive, having a door leaf that can be moved back and forth relative to a vehicle body, and having a drive unit and a holding device for the door leaf that interacts with the drive unit, wherein the drive unit has a motor, a gear train and a guide roller for at least one flexible transmission.

Background

Motor vehicle door drive devices are commonly used for opening and closing motor vehicle doors. The vehicle door concerned may in principle be a swing door or a motor vehicle swing door. Within the scope of the present application, sliding doors or motor vehicle sliding doors are mainly considered, by means of which the door leaf is used for closing or releasing a corresponding door opening in the motor vehicle body.

The corresponding motor vehicle sliding door drive for motor vehicle sliding door leaves is mostly arranged between the C-pillar and the D-pillar of the motor vehicle body and acts on the respective door leaf by means of a flexible transmission device, which is usually a bowden cable or toothed belt. For this purpose, the bowden cable is wound and unwound on a winding roller. The winding roller itself is rotated by a motor or an electric machine as a component of the drive, so as to provide the desired movement of the door leaf.

A basic design of such a motor vehicle door drive, in particular a motor sliding door drive, is described in DE 10 2014 101 036 B4 of this type. The door leaf which can be moved relative to the vehicle body can be locked or unlocked by means of a brake. For this purpose, the brake has a bistable blocking device which acts as a component of the drive unit on the motor shaft of the drive motor.

The bistable locking device can be equipped with a spindle drive and a lever mechanism for actuating the brake. The locking process or unlocking process can be performed by left or right turning of the screw.

In the known teaching, the motor is equipped with a transmission at one end. The guide roller for the endless toothed belt is acted upon by means of a transmission mechanism, and the door leaf is connected to the endless toothed belt via a carrier. At the other end of the electric motor remote from the transmission, a locking device is provided, which has the previously mentioned holding device. In this case, the design is generally such that in each case one side as motor and the other side as transmission and final locking device have their own housing and also have separate holders due to the separate design. Since, for example, the locking device can also be constructed as a retrofit assembly according to the description in claim 13 of the above document. This generally results in a complex installation.

Another prior art according to document EP 1 676 972 B1 relates to an opening and closing system for a sliding door of a motor vehicle. In addition to the drive mechanism, a brake device is realized, which is equipped with a brake element. The brake device has a wedge-shaped brake shoe which can be inserted for braking into a gap between a roller supporting the sliding door and an inner wall of a guide rail associated with the roller. That is, in this case, the braking device does not interact with the drive unit, but with the door leaf.

The holding device is thus positioned in the region of the guide rail for the motor vehicle sliding door and is thus positioned on or in the associated motor vehicle body away from the drive unit. Although the possibility of implementing a braking function directly on the drive unit, for example by disengaging a clutch, is also mentioned here. However, no detailed details are disclosed.

Disclosure of Invention

The object of the present invention is to further develop such a motor vehicle door drive, in particular a motor vehicle sliding door drive, such that a retaining function can be provided in a technically simple manner.

In order to solve this problem, within the scope of the invention, a motor vehicle door drive device of this type, in particular a motor vehicle sliding door drive device, is distinguished in that the holding device has a holding lever which is provided to engage with and lock the output shaft of the motor for holding the door leaf.

In a preferred embodiment, the holding device has its own drive and/or spring, which is provided for engaging or disengaging the holding lever with the output shaft of the electric motor. That is, the drive means and/or the spring bring the holding rod against or for disengaging the holding rod from the output shaft of the motor. If provided, the spring is responsible for regularly engaging the retaining rod with the output shaft of the motor. This ensures that the door leaf is fixed and does not move automatically, for example in the presence of a tilt and in the case of a motor vehicle resting on a tilt. Since the additionally provided drive units for the door leaves are in this case mostly (individually) not able to fix the door leaves.

In order to move the door leaf in this or in general by means of the drive unit, the own drive of the holding device must therefore first and regularly be used to disengage the holding rod from the output shaft of the motor against the force of the spring. The door leaf can then be loaded without problems by means of the drive unit without additional resistance being applied by the retaining bar. In principle, however, it is also possible to use only springs, so that the drive unit must work against the frictional forces exerted by the retaining rod on the output shaft of the motor. For this reason, the own drive of the holding device is usually implemented alone or in combination with a spring.

The holding device may additionally have an emergency actuating device for the holding rod. The emergency actuating device is usually connected to a holding rod and can be manually loaded. For this purpose, the emergency actuating device can be a manual actuating element which is connected to the holding rod or is mechanically connected to the holding rod and which can be acted upon by the operator through the housing in a manner similar to a "child safety device", so that the door leaf can be moved manually as a whole even if the holding device's own drive fails or even if the drive unit fails.

The holding rod preferably has the form of a double leg, wherein one leg is provided for cooperation with the own drive and the other leg is provided for cooperation with the output shaft of the motor. It is particularly preferred that the length of the (two) legs is different, so that the retaining bar has an L-shape. By means of the double-leg design, in particular, a higher degree of freedom can be achieved in terms of the arrangement of the drive of the holding device itself relative to the output shaft of the motor.

For this purpose, the output shaft preferably has a retaining flange on the end side which interacts with a retaining rod.

In this case, the retaining rod has further design details such that it has a retaining rubber pad which can be selectively brought into abutment with the retaining flange or again out of engagement with the retaining flange. The retaining rubber pad can be configured in a disk-like manner, similar to the retaining flange. It is also conceivable that the holding rubber pad is formed of a material different from the holding rod supporting the holding rubber pad. The retaining rubber pad can be made of plastic, for example, while the retaining rod is designed as metal. The retaining rubber pad is preferably composed of a thermoplastic elastomer and the retaining rod is composed of another plastic. Whereby the weight can be kept low.

In a further preferred embodiment, the holding device and the drive unit are mounted on or at a common base plate. That is, within the scope of the present invention, all the space for the following components is on the (unique) substrate: said means are associated with the driving of the reciprocally movable door leaf and, if necessary, with the braking or holding thereof. Typically, only at least one flexible transfer means extends from said base plate in order to create the desired mechanical connection with the door leaf. Likewise, connection cables for the control unit can extend from the base plate, by means of which the drive unit or the motor and the holding device can be driven and loaded as desired.

According to an advantageous embodiment, the holding device and the drive unit together with the substrate carrying them define a mounting unit or a structural unit. In addition, it is advantageous if the holding device and the drive unit are preferably accommodated in a common housing. In this way, a compact installation unit or structural unit is provided, which in terms of its outer construction or housing only involves the base plate and the additional common housing. All the individual elements concerned, which are part of the holding device and the drive unit, are located inside the housing, so that only at least one flexible transmission device and, if necessary, the cable described above need to be led out of the relevant installation unit or structural unit.

The above-described mounting unit or structural unit can thus be mounted simply and quickly, for example, inside the body of a motor vehicle, preferably in the region between the C-pillar and the D-pillar. Of course, other mounting arrangements or other mounting locations are also conceivable. In this case, only three fastening points are generally required for the assembly, which define a common base plate for receiving the holding device and the drive unit. These three fastening points serve for the correct and statically defined orientation and installation of the structural unit or the installation unit on or in the vehicle body.

The guide roller, which is a component of the drive unit, is typically a winding roller for the flexible transfer device. Flexible transmission devices typically use a pull cable or rope. In principle, it is also possible to wind and unwind two ropes on a winding roller. The two ropes can be guided here by guide rollers in a similar manner to the teaching according to EP 1 676 972 A2 and are mechanically connected with their respective ends to the reciprocable door leaf. The winding and unwinding of one or both ropes on the winding roller is thus associated with the desired movement of the door leaf or sliding door leaf in the longitudinal direction of the vehicle body.

A motor vehicle door drive is thereby provided, which serves not only for driving the respective door leaf, but also for braking the respective door leaf, for example in a semi-open position relative to the vehicle body or on a sloping road. Furthermore, the door leaf can be fixed in any desired position relative to the vehicle body by means of the retaining device.

Drawings

The invention is explained in detail below with the aid of the figures, which show only one embodiment; in the accompanying drawings:

figure 1 schematically shows a motor vehicle door drive device or a motor sliding door drive device according to the invention,

figure 2 shows in detail the drive means or drive unit together with the holding means in a first embodiment,

fig. 3 shows a variant of the object according to fig. 2.

List of reference numerals:

1. mounting unit

2. Transmission device

3. Door leaf

4. Driving unit

5. Holding device

6. Vehicle body

7. Motor with a motor housing

8. 9 transmission mechanism

8. Output worm

9. External teeth

10-roll, guiding-roll or winding-roll

11 electromechanical brake drive or motor

12. Holding rod

13. Retaining flange

14. Rubber holding pad

15. Tooth part

16. Output worm

17. Shaft

18. Substrate board

19. Receiving portion

20. Fixed point

21. Spring

22. Emergency actuating device

23. Sensor for detecting a position of a body

Detailed Description

In fig. 1, a motor vehicle door drive or a motor sliding door drive is schematically and simplified. For this purpose, a mounting unit 1 is provided, which will be described in more detail below, which mainly comprises a drive unit 4 and a holding device 5 as shown in fig. 2. As indicated by the double arrow in fig. 1, the reciprocable door leaf 3 is here reciprocable relative to the body 6 of the motor vehicle in the longitudinal direction. For this purpose, the drive unit 4 acts on the door leaf 3 via the flexible transmission device 2. For this purpose, the drive unit 4 in particular accordingly loads the flexible transmission device 2 with a tensile force, as indicated by the additional arrow in fig. 1.

In principle, two transfer devices 2 can also be realized here, as shown in fig. 2. In this case, one or both transmission devices 2 are each mechanically connected to the door leaf 3 and serve to carry out a reciprocating movement of the door leaf, which is indicated in fig. 1 by a double arrow.

Fig. 2 shows the detailed structure of the mounting unit 1 which has been described previously. In fact, the drive unit 4 and the holding device 5, which are shown in detail here, together define the already mentioned mounting unit 1, which can be fastened as a whole to the vehicle body 6 or in the vehicle body 6. This may be done, for example, but not limited to, in the region between the C-pillar and the D-pillar inside the vehicle body 6, but this is not shown in detail.

As can be seen from fig. 2, the drive unit 4 and the holding device 5 interacting with the drive unit 4 each act on the door leaf 3, in particular indirectly via at least one flexible transmission device 2. The drive unit 4 itself has a motor 7, transmission mechanisms 8, 9 and guide rollers 10 for the at least one flexible transmission device 2. As can be seen from the embodiment according to fig. 2, the guide roller 10 is embodied as a winding roller 10. In the figure, two ropes 2 are received in winding form as flexible transmission means 2 on winding rollers 10, the ends of which are each mechanically connected to a door leaf 3.

If, for example, the motor 7 is used to move the guide or winding roller 10 in a clockwise direction, the rope 2 on the left is wound up here and the rope 2 on the right is unwound. The reverse process is performed when the guide or winding roller 10 moves counterclockwise. Since both ends of the rope 2 are connected to the door leaf 3, the door leaf 3 can be reciprocated in the directions indicated by double arrows in fig. 1 in such a manner as to reciprocate with respect to the vehicle body 6.

The winding or guiding roller 10 is driven by means of the motor 7 in such a way that the motor 7 has an output shaft with an output worm 8. The output worm 8 meshes with external teeth 9 on a winding or guiding roller 10. Depending on the design of the output worm 8 and the external toothing 9, the respective gear ratios of the gear mechanism 8, 9 formed thereby are provided and set in this way.

The basic structure then comprises a holding device 5 for the door leaf 3, which interacts with the drive unit 4. The holding device 5 itself is composed of its own electric drive 11 and a holding rod 12 acted upon by the drive 11. The holding rod 12 is provided for holding the door leaf 3 in a desired position. For this purpose, the holding rod 12 can be engaged with the output shaft of the motor 7 by means of its own drive 11 and can be locked. The holding rod 12 has the form of a double leg, wherein one leg is provided for cooperation with the drive means 11 and the other leg is provided for cooperation with the output shaft of the motor 7. The interaction between the holding device 5 and the drive unit 4 now takes place in that the output shaft of the motor 7 of the drive unit 4 with the output worm 8 has a holding flange 13 on the end side which interacts with the holding rod 12.

In practice, the holding rod 12 has a holding rubber pad 14 on the end face, which can be selectively brought into contact with a holding flange 13 on the end face of the output shaft of the motor 7 as a function of the loading of the holding rod 12 by the brake drive or the motor 7, and which in turn can be glued off. It can be seen that the holding device 5 generally interacts with the end of the drive unit 4 on the transmission side as well as on the force flow side. This is because the retaining flange 13 is present at the end of the drive unit 4 on the transmission side and on the force flow side. The holding device 5 now interacts with the associated holding flange 13 via a holding rubber pad 14, which is likewise constructed in the shape of a ring or a disk.

As already stated in the opening part of the description, the holding rod 12 can be made entirely of plastic. Within the scope of the present embodiment, the holding rod 12 is designed as an L-shaped rod as a whole. The L-shaped retaining bar 12 has the already mentioned retaining rubber pad 14 on the short leg portion of its L-shaped leg and its end. While the teeth 15 are realized at the ends of the long legs of the L-shaped retaining bar 12.

The teeth 15 on the long leg end of the L-shaped leg of the L-shaped retaining bar 12 are generally engaged with an output worm 16, which is provided on the output shaft of the drive 11. The rotational movement of the own drive 11 of the holding device 5 thus causes the holding rod 12 to perform a corresponding pivoting movement about its axis 17. This pivoting movement about the axis 17 corresponds to the fact that the holding rubber pad 14 rests on the end of the holding rod 12, as described above, on the holding flange 13 on the transmission-side and on the force-flow-side end of the drive unit 4. Thereby, the drive unit 4 is selectively braked by means of the holding device 5. The same applies to the door leaf 3.

In particular and for the present invention, it is important that the holding device 5 and the drive unit 4 are jointly mounted on a common base plate 18. The common base plate 18 is closed by means of a common housing which accommodates the holding device 5 and the drive unit 4, which housing is shown in fig. 2 in a detached state for better illustration. The associated housing can for this purpose have a plug which is inserted into an associated (plug) receptacle 19 on the base plate 18. Thereby the above-mentioned mounting unit 1 is provided, which comprises the holding means 5 and the drive unit 4. The mounting unit 1 or the corresponding structural unit can be easily mounted on or in the vehicle body 6.

For this purpose, the base plate 18 has a fixing point 20. In this embodiment, a total of three fastening points 20 are provided, through which, for example, not shown bolts are passed and serve to fasten the mounting unit 1 in or on the vehicle body 6. Only flexible transmission means 2 or two ropes 2 need to be led out of the respective housing in order to achieve the desired mechanical indirect connection with the reciprocable door leaf 3.

Fig. 3 shows a variant embodiment of the holding device 5, the basic structure of which corresponds to the variant according to fig. 2, so that reference can be made to the previous description of the basic mode of operation. In the context of the variant according to fig. 3, the holding device 5 is not only equipped with its own drive 11, but is additionally equipped with a spring 21. The spring 21 continuously engages the holding rod 12 with the output shaft of the motor 7 by means of its spring force indicated by the arrow in fig. 3. This is possible because according to this embodiment and without limitation, neither the drive unit 4 nor the drive means 11 are designed to be self-locking, so that the holding rubber pad 14 is permanently held against the holding flange 13 by means of the force exerted on the holding rod 12 by the spring 21. This ensures that the door leaf 3 is fixed, for example, when the vehicle body is tilted on a slope, and does not open automatically, for example.

For this purpose, the spring 21 is specifically designed as a switching spring (Kippfeder) and is fastened with one leg thereof to the base plate 18, while the other leg is suspended into the holding rod 12. In order to be able to move the door leaf 3 without problems by means of the drive unit 4 in this embodiment, the drive 11 must first disengage the holding rod 12 from the output shaft of the motor 7 against the force of the spring 21.

Additionally and as a further feature, the emergency actuating device 22 can also be seen in the embodiment variant according to fig. 3. According to this exemplary embodiment, the emergency actuating device 22 is designed as a manual actuating element which protrudes through the housing of the closure base 18 in the region of the opening shown, so that the operator can act on the manual actuating element or the emergency actuating device 22 in the event of a failure of the drive device 11 of the holding device 5 itself.

Finally, in fig. 3, a sensor 23 is also provided on the substrate 18. The position of the holding rod 12 can be detected by means of the sensor 23 and transmitted to a control unit, not explicitly shown. In this embodiment, the sensor 23 is a switch which is acted upon by a projection on the holding rod 12 once the holding rod 12 is engaged with the output shaft of the motor 7. In any case, a problem-free functional mode of the holding device 5 can be interrogated by the sensor 23 and obtained by means of the control unit. Furthermore, the control unit can load its own drive 11 in accordance with the signal of the sensor 23 and ensure that the holding rod 12 releases the output shaft of the motor 7.

Claims

1. A motor vehicle door drive device having a door leaf (3) which can be moved back and forth relative to a vehicle body (6) and having a drive unit (4) and a holding device (5) for the door leaf (3) which interacts with the drive unit (4), wherein the drive unit (4) has a motor (7), an output shaft of the motor (7), a transmission (8, 9) and a guide roller (10) for at least one flexible transmission (2),

the holding device (5) has a holding rod (12) which is provided for engaging with the output shaft of the motor (7) for holding the door leaf (3) and locking the output shaft,

the holding device (5) has its own drive (11) and spring (21) which are provided for engaging the holding rod (12) with the output shaft of the motor (7) and for disengaging the holding rod from the output shaft of the motor,

it is characterized in that the method comprises the steps of,

the output shaft of the motor (7) has a holding flange (13) on the end side which interacts with a holding rod (12),

the holding rod (12) has the form of a double leg, one leg being provided for cooperation with the drive means (11) and the other leg being provided for cooperation with the output shaft of the motor (7),

the holding rod (12) has a holding rubber pad (14) on one leg, which can be selectively brought into and out of contact with a holding flange (13), and on the other leg has a toothing (15) for interaction with an output worm (16) of the drive (11), which is arranged on the output shaft of the drive (11).

2. Motor vehicle door drive device according to claim 1, characterized in that the holding means (5) and the drive unit (4) are mounted on or at a common base plate (18).

3. Motor vehicle door drive device according to claim 1 or 2, characterized in that the holding means (5) and the drive unit (4) together form a mounting unit (1).

4. A motor vehicle door drive device according to claim 3, characterized in that a common housing is provided, which encloses the holding means (5) and the drive unit (4).

5. Motor vehicle door drive according to claim 1 or 2, characterized in that the guide roller (10) is configured as a winding roller (10) for one or both ropes (2).

6. Motor vehicle door drive device according to claim 1 or 2, characterized in that the holding device (5) has an emergency actuating device (22) for the holding rod (12).

7. The vehicle door drive apparatus according to claim 1, wherein the vehicle door drive apparatus is a vehicle sliding door drive apparatus.