CN115956156A

CN115956156A - Motor vehicle door drive, in particular motor vehicle sliding door drive

Info

Publication number: CN115956156A
Application number: CN202180050546.6A
Authority: CN
Inventors: S·戈尔德曼; M·博姆
Original assignee: Kiekert AG
Current assignee: Kiekert AG
Priority date: 2020-08-17
Filing date: 2021-06-15
Publication date: 2023-04-11
Also published as: WO2022037738A1; DE102020121506A1; EP4196661A1; JP2023538363A; KR20230049739A

Abstract

The invention relates to a motor vehicle door drive, in particular a motor vehicle sliding door drive, which is equipped with a door leaf (3) that can be moved to and fro relative to a vehicle body (6). A drive unit (4) and a holding device (5) for the door leaf (3) interacting with the drive unit (4) are also realized. Furthermore, stroke sensors (16, 17) associated with the drive unit (4) are implemented. According to the invention, the travel sensor (16, 17) is designed as a combined travel/direction sensor (16, 17).

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 to and fro relative to a vehicle body, having a drive unit and a holding device for the door leaf that interacts with the drive unit, and having a travel sensor assigned to the drive unit.

Background

The drive unit usually has a motor, a downstream gear mechanism and a guide roller for at least one flexible transmission element. The door leaf is connected to the transmission element and can be moved back and forth in this way. By means of the holding device, a door leaf that can be moved relative to the body can be locked or unlocked.

Motor vehicle door drives are typically used for opening and closing motor vehicle doors. The associated motor vehicle door can 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 primarily considered, which with their door leaf serve to close or open a corresponding opening in the motor vehicle body.

The associated motor vehicle sliding door drive for a motor vehicle sliding door leaf is usually arranged between the C-pillar and the D-pillar of the motor vehicle body and acts on the associated door leaf via a flexible transmission. In this case, a bowden cable can be used in general, or a toothed belt can also be used. For this purpose, the bowden cable is wound and unwound on the guide roller. For this purpose, the guide roller can be designed as a winding roller. The winding roller or the guide roller itself is rotated as a component of the drive unit by means of an electric motor or a gear mechanism connected downstream. In this way, a desired door leaf movement can be provided.

In a motor vehicle door drive of the type described in DE 10 2014 101 036 B4, the lever mechanism for actuating the brake is implemented analogously to the retaining device. The drive unit also has an incremental encoder as a sensor, which interacts with the associated motor shaft. The rod mechanism and the screw transmission mechanism work together. By turning the threaded rod to the right or to the left, the locking or unlocking process can be carried out and carried out by means of the lever mechanism.

In order to precisely drive the door leaf from the drive unit side with a view to the aim or also by means of the holding device, a precise position of the door leaf is important. The incremental encoder realized in DE 10 2014 101 036 B4 provides a first projection here, which relates to the stroke performed by means of the drive unit. However, neither absolute adjustment values nor possible direction data can be derived therefrom.

The further prior art according to EP 1 676 972 B1 is not further developed in this regard. In fact, an opening and closing system for a sliding door of a motor vehicle is described herein. In addition to the drive mechanism, a holding device equipped with a braking element is again realized. The retaining device has a wedge-shaped retaining rubber 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. This results in relatively inaccurate position data of the door leaf.

Disclosure of Invention

The object of the present invention is to further develop such a motor vehicle door drive and in particular a motor vehicle sliding door drive such that the positional data on the door leaf are improved overall.

In order to solve this problem, it is proposed within the scope of the invention for a motor vehicle door drive of this type that the travel sensor associated with the drive unit is designed as a combined travel/direction sensor according to the invention. In other words, within the scope of the invention, it is possible to detect not only the stroke performed by the drive unit, which corresponds to a specific door leaf movement stroke, by means of the stroke sensor. Furthermore, the invention makes it possible, at least additionally, to detect the direction of the door leaf movement also by means of a combined travel/direction sensor.

This information is important, for example, in the context of an associated motor vehicle having a motor vehicle sliding door drive according to the invention being located on a downhill stretch or on an incline. Depending on the orientation and orientation of the vehicle body, the holding device can hold the door leaf, for example, in a half-open position. If the holding device now releases the door leaf, the drive unit must be purposefully controlled to ensure that, for example, the door leaf is closed. For this purpose, the control unit for the motor vehicle door drive can evaluate not only the direction information of the combined travel/direction sensor, but also one or more position sensors of the vehicle body, which give information about the orientation of the vehicle body, for example, so that the motor vehicle is parked on a slope, either uphill or downhill, in the direction of travel.

In any case, the design of the travel sensor as a combined travel/direction sensor provides comprehensive information about the control unit that controls the drive unit and the holding device, in order to avoid malfunctions and to provide the user with a clear and desired control of the door leaf. This is a major advantage of the present invention.

In the context of a preferred variant, the travel/direction sensor operates in a contactless manner. Inductive travel and direction detection has proved to be particularly advantageous here. In principle, however, the travel/direction sensor can also operate optically. Furthermore, the travel/direction sensor can also be designed quite generally as a position sensor which detects an absolute position and further transmits it to the control unit. In this case, not only the completed relative path and the direction of the path are detected, but also each movement of the drive unit and thus the actuation of the door leaf corresponds to the fact that a specifically coded position of the drive unit and thus of the door leaf relative to the vehicle body is known and provided for this purpose. However, it is generally sufficient to use a stroke/direction sensor here.

The stroke/direction sensor is generally constituted by at least two parts of a key position element (Tastelement) and a sensing element. Here, the key members are usually connected to the output shafts of the motors as an integral part of the driving unit. Accordingly, the sensor element is designed to be fixed in position. In principle, the opposite movement is also possible. In this case, the sensing element is connected to the motor output shaft in question, while the key elements have a fixed orientation and positioning.

A variant is particularly preferably designed in that the key elements are arranged in or on the retaining flanges of the retaining device. The retaining collar usually interacts with a retaining rubber which can rest against the retaining collar and can in turn be moved away from the retaining collar, which is located on the end face of a retaining rod which is part of the retaining device. Thus, the key elements are integrated directly into the structural elements of the drive unit which are always required for the integration and finally no further structural adaptation is required.

In a particularly preferred embodiment, the key elements and the retaining flanges are formed in one piece. This is achieved in that the retaining flange forms a magnetic member. In this particularly preferred embodiment, the holding flange is designed as a plastic-based magnetic component and is made of plastic with magnetic particles, preferably ferrite particles. The holding flange is produced in an injection molding process, wherein the magnetic particles are magnetized during or after the injection molding. By means of the integrated embodiment of the key elements and the retaining flange, the retaining flange simultaneously assumes two functions, namely a retaining function and a position determining function of the motor vehicle door.

In fact, the retaining flange can be coupled particularly advantageously in a rotationally fixed manner and, in most cases, also in a form-fitting manner to the output shaft of the electric machine. For this purpose, the output shaft usually has a flattened area, or the holding flange and the output shaft together form a circle, while the output shaft and the recess for the output shaft are each formed in a semicircular shape in cross section. The desired rotationally fixed and form-fitting coupling between the retaining flange and the output shaft is thereby automatically provided. The retaining flange is then simply slipped onto the output shaft.

Since the retaining flange is made of plastic, the magnetic field of the key elements can be received and recorded without problems by the fixed-position sensing elements. In fact, two sensing elements are generally provided for determining the stroke and direction of the key elements. The two sensor elements can be positioned on a circuit board, which is a printed circuit board, which is furthermore equipped with a protective sheath as a package in order to protect the two sensor elements from environmental influences.

By means of the two sensor elements, it is generally not only possible to carry out and carry out a stroke measurement of the output shaft of the electric motor or drive unit having the holding flange. Since in each revolution of the output shaft, a signal is generated in the associated sensing element by the passing key element. The use of two sensing elements opens up the further possibility of determining the direction of the rotational movement of the output shaft also by means of a control unit which evaluates the signals of the travel/direction sensor. For this purpose, the two sensing elements are arranged in a common plane defined by the circuit board already mentioned. The plane is for the most part oriented tangentially to the output shaft with the holding flange.

Thus, a rotational movement of the holding flange and thus of the output shaft, for example in the clockwise direction, results in the sensor on the right side or the sensing element on the right side in the cross section receiving an increasing signal and, conversely, the sensing element on the left side registering a decreasing magnetic field strength signal. Conversely, upon movement in a counterclockwise direction, the sensing elements on the right sense a decreasing signal strength, while the sensing elements on the left increase in signal strength. The number of the increased signals or the decreased signals during one complete revolution of the output shaft depends on the number of poles of the key position element. If the key elements are, for example, three-pole, the sensing elements detect a total of six signals, and for the key elements of two poles, four signals. In any case, it is clear that, due to these time sequences of the signal sequences observed on the two sensing elements and the evaluation of the signal sequences in the control unit, the direction of the output shaft with the holding flange can be deduced. For the reasons mentioned above, this is particularly important for being able to move the door leaf back and forth specifically and as desired by means of the drive unit. This is a major advantage of the present invention.

Drawings

The invention is explained in detail below on the basis of the figures which show only one embodiment; the figures show that:

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

FIG. 2 shows a motor vehicle sliding door drive in a perspective detail view, and

fig. 3 schematically shows a stroke sensor.

Detailed Description

Fig. 1 shows a schematic and simplified illustration of a motor vehicle door drive or a motor vehicle sliding door drive. For this purpose, a fitting unit 1 is arranged, which will be described in detail below, which by way of example, but not by way of limitation, combines a drive unit 4 and a holding device 5, which will be described in detail below. The door leaf 3, which is movable to and fro, can be moved to and fro in the longitudinal direction relative to the motor vehicle body 6 in this way. This is shown in fig. 1 by the double arrow. For this purpose, the drive unit 4 acts on the door leaf 3 via the flexible transmission 2. For this purpose, the drive unit 4 loads the flexible transmission element 2 in particular with a tensile force as shown in fig. 1, as indicated in said fig. 1 by an additional arrow. In principle, two transmission elements 2 can also be realized here, which, however, is not shown in detail in fig. 1.

The detailed structure of the assembly unit 1 that has been explained before is now described in fig. 2. Here, a drive unit 4 and a holding device 5 can be seen, which are combined and fixed as a unit in or on a vehicle body 6. This is implemented for example and without limitation in the region of a C-pillar or D-pillar inside the body 6. However this is not shown in detail.

As can be seen from fig. 2, the drive unit 4 has a motor 7 and a gear 8, 9 which follows the motor 7 and is connected downstream of the motor. By means of the gear mechanisms 8, 9, the guide or winding roller 10 can be rotated in a clockwise direction and in a counterclockwise direction, so that the flexible transmission element 2 received on the winding or guide roller 10 is wound and unwound in this manner. Since the door leaf 3 is connected to the flexible transmission 2, the door leaf 3 is moved back and forth in this way.

According to this embodiment, it can be seen that two cables 2 are received as flexible transmission members 2 by means of a winding roller 10. For example, if the motor 7 is now used to move the guide roller or winding roller 10 in the clockwise direction, the left-hand cable 2 is wound up here, while the right-hand cable 2 is unwound. The reverse is true when the guide roll or winding roll 10 is moving in the counterclockwise direction. Since both ends of the cable 2 are connected to the door leaf 3, the door leaf 3 can be moved back and forth in the direction indicated by the double arrow in fig. 1, i.e. back and forth relative to the vehicle body 6.

The winding or guide 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. An output worm 8 on the output shaft meshes with an outer toothing 9 on a winding or guide roller 10. This results in the gear mechanisms 8, 9.

The holding device 5 for the door leaf 3, which has already been mentioned above and interacts with the drive 4, also belongs to the basic structure. The holding device 5 itself consists of its own electric drive 11 and a holding rod 12 acted on by the drive 11. The door leaf 3 can be fixed and approximately locked in a desired position relative to the body 6 by means of the retaining rod 12. For this purpose, the holding rod 12 can be brought into engagement with the output shaft of the electric motor 7 and the output shaft can be locked by means of its own drive 11. For this purpose, the holding rod 12 has a double-arm form, wherein one arm of the holding rod 12 is provided for co-action with the drive 11 and the other arm is provided for co-action with the output shaft of the motor 7. The interaction between the holding device 5 and the drive unit 4 is now performed in such a way that the output shaft of the electric motor 7 of the drive unit 4, which has the output worm 8, has a holding collar 13 on the end side, which interacts with the holding rod 12.

In practice, the holding rod 12 has a holding rubber 14 on the end face, which, as a function of the load applied to the holding rod 12 by the electric motor 11, selectively bears against the holding collar 13 on the end face of the output shaft of the electric motor 7 and can again be moved away therefrom. For this purpose, the retaining collar 13 is designed as a knurling wheel or has a grooved surface according to an embodiment, in order to provide a particularly effective force connection between the retaining rubber 14 and the retaining collar 13 at the end face of the retaining rod 12. Furthermore, the holding rod 12 is equipped on one of its arms with a toothing 15 which meshes with a worm on the output shaft of the motor 11 and in this way ensures that the L-shaped holding rod 12 performs the required pivoting movement, whereby in this way the holding rubber 14 can be moved towards the holding collar 13 and fix or release it.

In addition to the holding device 5 for the door leaf 3, which interacts with the drive unit 4, the basic structure of the invention also comprises a

travel sensor

16, 17 assigned to the drive unit 4. The

travel sensors

16, 17 are designed according to an exemplary embodiment and according to the invention as combined travel/

direction sensors

16, 17 and are therefore able not only to detect the travel performed by the output shaft of the electric motor 7 and to transmit said travel to the illustrated control unit 18, but also to determine the direction of the output shaft of the electric motor 7 by means of the control unit 18, as will be explained in more detail below.

According to this embodiment, the travel/

direction sensors

16, 17 operate contactlessly, i.e. inductively. In practice, the stroke/

direction sensors

16, 17 are designed in two pieces, i.e. comprising at least the key elements 16 and the sensing elements 17. According to this embodiment, a rotating key element 16 is realized, and accordingly, two positionally fixed sensing elements 17 are provided, which are arranged jointly on or at the circuit board 19 shown in fig. 2. The key elements 16 are here connected to the output shaft of the motor 7. For this purpose, in a preferred embodiment, the key elements 16 are formed integrally with the retaining collar 13. The holding flange 13 is a plastic-based magnetic component in the preferred embodiment and is made of plastic in which magnetic particles, preferably ferrite particles, are embedded. In this embodiment, the holding collar 13 is produced by means of an injection molding method, wherein the magnetization of the magnetic particles takes place during or after the injection molding. Preferably, the holding flange is designed as a three-pole magnet. Of course, alternative designs of the retaining flange 13 with the keying elements 16 are also possible, for example the keying elements 16, in this case permanent magnets, can be embedded inside the retaining flange 13 made of plastic. The retaining flange 13 is fitted over the output shaft of the electric motor 7 in a rotationally fixed and form-fitting manner as a whole. For this purpose, the output shaft of the motor 7 may have a D-shaped character in cross section. The recess of the retaining flange 13, which receives the output shaft of the electric motor 7 inside, can be designed identically for providing the desired rotationally fixed and form-fitting plug connection between the output shaft and the retaining flange 13.

The operation of the two sensing elements 17 for determining in combination the stroke and the direction of the key elements 16 is now shown in the enlarged view of fig. 3. Here, the two sensing elements 17 are arranged jointly on a circuit board 19. The circuit board 19 is oriented predominantly tangentially compared to the retaining flange 13 with the keying elements 16. In the figure, the sensing element 17 on the left is denoted by reference numeral 17.1 and the sensing element 17 on the right is denoted by reference numeral 17.2.

It can now be seen that in the indicated clockwise movement of the holding flange 13 and thus also of the output shaft of the electric motor 7, the signal on the left-hand sensor element 17.1 falls as schematically shown, while the signal on the right-hand sensor element 17.2 rises. For this purpose, the control unit 18 evaluates the two signals or the angle of the rotational movement of the holding flange 13, shown in fig. 3 with strength S, with respect to each other

The combined signal of (1). In contrast, the movement of the holding collar 13 in the counterclockwise direction corresponds to the signal sequence shown in the opposite way. In any case, the signal sequences of the two key elements 17 or 17.1 and 17.2 can be evaluated by means of the control unit 18. The control unit 18 can thus deduce the direction of the output shaft of the electric motor 7, in this embodiment a rotational movement of the output shaft of the electric motor 7 in the clockwise direction. For the sake of simplicity, the diagram shows the signal profile of the key elements 16 of the monopole.

List of reference numerals:

1. assembly unit

2. Transmission member and stay cable

3. Door leaf

4. Drive unit

5. Holding device

6. Vehicle body

7. Electric machine

8. Output worm

9. Toothed section

10. Guide or winding roller

11. Drive device

12. Retaining rod

13. Retaining flange

14. Retention rubber

15. Toothed segment

16. Key position element

17. Sensing element

17.1 Left side sensing element

17.2 Sensing element on right side

18. Control unit

19. Circuit board

Claims

1. A motor vehicle door drive, in particular a motor vehicle sliding door drive, having: a door leaf (3) which can move back and forth relative to the vehicle body (6); a drive unit (4); a holding device (5) for the door leaf (3) interacting with the drive unit (4); stroke sensors (16, 17) associated with the drive unit (4),

it is characterized in that the preparation method is characterized in that,

the travel sensors (16, 17) are designed as combined travel/direction sensors (16, 17).

2. Drive arrangement according to claim 1, characterized in that the stroke/direction sensor (16, 17) operates contactlessly.

3. Drive arrangement according to claim 2, characterized in that the stroke/direction sensor (16, 17) acts inductively or optically.

4. The driving device according to any one of claims 1 to 3, characterized in that the stroke/direction sensor (16, 17) is designed in two pieces, i.e. at least comprising key elements (16) and sensing elements (17).

5. The driving device according to claim 4, characterized in that the key members (16) are connected to the output shafts of the motors (7) of the driving unit (4).

6. The driving device according to claim 4 or 5, characterized in that the key elements (16) are arranged in or on the retaining flanges (13) of the retaining means (5).

7. The driving device according to claim 6, characterized in that the key elements (16) and the retaining flanges (13) are integrally constructed.

8. Drive arrangement according to claim 6 or 7, characterized in that the retaining flange (13) is made of plastic.

9. Drive arrangement according to one of claims 6 to 8, characterized in that the retaining flange (13) is fitted in a rotationally fixed manner and, if appropriate, in a form-fitting manner onto the output shaft of the electric motor (7).

10. The driving device according to any one of claims 4 to 9, wherein two sensing elements (17.