DE102017101703A1 - Lock with a closing device for a motor vehicle - Google Patents

Abstract

The invention relates to a lock (1) for a motor vehicle comprising a locking mechanism (2) comprising a rotary latch (3) and at least one pawl (4, 5), a closing device (9), an electric drive, and a torque converter, wherein of the torque converter, a variable torque in the closing device (9) is adjustable, and wherein the tightening at least partially by means of a frictional connection (K) can be achieved.

Description

The invention relates to a lock for a motor vehicle comprising a locking mechanism comprising a rotary latch and at least one pawl, a closing device, an electric drive and a torque converter, wherein a variable torque in the closing device can be adjusted by means of the torque converter.

In order to increase the comfort in a motor vehicle and to allow the simplest possible operation of a motor vehicle, more and more comfort functions are integrated into the motor vehicle. For example, it is known that motor vehicle doors, flaps or hoods are closed by means of a closing device. On the one hand, this may be due to the fact that, on the one hand, easy closing of the door is made possible; on the other hand, this may be due to the fact that, for example, an outside door handle should be dispensed with, in order to achieve a corresponding design or simplify the operation, by the door being independent is closable. Especially with fully automatic tailgates such Zuzieheinrichtungen are often in use. For example, these flaps can only be operated by a radio remote control without manual operation of the flap itself, for example.

For example, the concerns DE 101 40 365 A1 a power lock holder for a motor vehicle door lock, wherein the term "servo lock holder" is used for a lock holder, in which an automatic closing takes place. In this case, a locking bolt of the motor vehicle door lock is attached to an adjustable actuating oscillator. In addition, a drive for the actuating oscillator is provided. The drive transfers the actuating oscillator with the locking bolt and a locking bolt comprehensive the catch and consequently an associated door from a pre-locking position in a main rest position motor. An additional locking lever ensures that the actuating rocker is held in this position during manual transfer of the door from the pre-locking position to the main locking position.

Such provided with a Zuzieheinrichtung lock holder are basically used in all conceivable doors on a motor vehicle. Thus, not only an admission of side doors, but also of trunk flaps, tailgates or hoods is conceivable and is included in the invention. With the help of Zuzieheinrichtung realized in this way, the affected door or vehicle door can now be moved from the previously mentioned pre-locking position into a main locking position against the resistance of, for example, a seal.

Another constructive design of a Zuzieheinrichtung is the subject of DE 198 28 040 B4 , This is about a power-assisted locking device for doors, flaps, hoods or roofs of motor vehicles and in particular passenger cars, in which a pivotable stop element is arranged on a rotary latch. In addition, the pawl interacting with the catch also has a pivotable stop member. The two stop elements cooperate with a control disk during the opening or closing operation. The control disc is part of an actuator, with the help of both an opening and a closing operation can be effected.

In the DE 20 2008 015 089 U1 is so proceeded that a Achsgleich is provided to an axis of a catch of the locking mechanism mounted transfer lever. In addition, a drive pawl is mounted on a transmission element. The drive pawl is in turn connected to the drive by means of a Bowden cable or other means of connection.

In a generic state of the art a rotary latch is transferred from a pre-locking position to a main locking position by means of a Zuzieh- or drive pawl and with the aid of a Bowden cable with a separate external drive. The closing device has a Bowden cable, which is connected via a cam with a torque converter. An electric drive accesses this for example by means of a worm gear on a gear, wherein the gear additionally has a cam. The Bowden cable is connected to the cam in such a way that a drive path dependent torque can be generated.

Preferably, a progressively increasing torque is achieved, so that a different Zuziehmoment depending on the position of the cam on the catch can be provided. The torque converter thus generates a force dependent on the drive path, which is necessary for closing, that is to say a transfer of the rotary latch from a pre-locking position to a main locking position, necessary closing force. This is advantageous, for example, because when transferring the rotary latch from the pre-locking position to the main locking position, the rotary latch must be moved against a sealing pressure from, for example, a door seal.

The known Zuzieheinrichtungen in motor vehicle door closures have basically proven, but in practice often come up against limits or are in need of improvement. This can essentially be attributed to the fact that the power provided by the drive is sufficient and sufficient according to the generic state of the art also variable to the required force is adaptable, but to provide a comfort function in relation to larger Zuziehwege further measures are necessary. In other words, are not available for all comfort functions when pulling a motor vehicle solutions that meet all safety-related features in the automatic closing of motor vehicles.

The object of the invention is to provide an improved lock for a motor vehicle. Moreover, it is an object of the invention to provide a Zuzieheinrichtung for a castle, with the larger Zuziehwege for example, a motor vehicle door can be realized without the safety of the operator of a motor vehicle is impaired. In addition, it is an object of the invention to provide a structurally favorable and cost-saving solution.

The object is achieved by the features of independent claim 1. Advantageous embodiments of the invention are specified in the dependent claims. It should be noted that the embodiments described below are not restrictive, but rather any variation possibilities of the features described in the description and the subclaims are possible.

According to claim 1, the object of the invention is achieved in that a lock is provided for a motor vehicle, comprising a locking mechanism of a rotary latch and at least one pawl, a Zuzieheinrichtung, an electric drive and a torque converter, wherein by means of the torque converter, a variable torque in the closing device is adjustable and wherein the tightening can be achieved at least in regions by means of a frictional connection. By virtue of the force transmitted in the form of a frictional connection, at least in some areas, during the closing process, it is now possible to automatically carry out larger pulling paths for a motor vehicle or a component movably arranged on the motor vehicle without risking safety for the operator. A security risk arises when a movably arranged on the motor vehicle component is moved by means of an electric drive, which can lead to pinching an operator.

Particularly in the case of flaps or doors, very high closing forces have to be provided which must close a door or flap against the pressure of a seal. If now the door or flap or another movable component is pulled in such that there is only a traction in the closing device, then the component can be moved on the motor vehicle, but if, for example, a person or an object is trapped by the moving part, the traction can be overcome and the Zuziehvorgang is interruptible. For this purpose, only a force beyond the frictional force must be generated during clamping in order to interrupt the closing process or to disengage a part of the closing device. The traction makes it possible to eliminate the risk of trapping.

As a lock for a motor vehicle different locks and actuators can be used. The lock can be used as a compact unit, for example in a side door, sliding door or in the range of flaps or covers or covers. In addition, it is also conceivable that, for example, hood locks, auxiliary locks such as in vans, are used.

A ratchet in a motor vehicle lock has a catch and at least one pawl, wherein the catch is durable by means of the pawl in a locked position. Two-stage locking mechanisms consisting of a preliminary catch and a main catch as well as systems with one or two pawls are used.

On the ratchet acts a trigger lever, wherein the trigger lever, for example, by a pivoting movement brings the one or more pawls out of engagement with the locking latch. Preferably, the release lever is pivotally mounted in the motor vehicle lock and preferably in a housing and / or a lock case of the motor vehicle lock.

The closing device has an electromotive drive and cooperates with a torque converter. In this case, the electric drives can be arranged with the torque converter directly in the lock or interact as a separate module, for example by means of a Bowden cable directly or indirectly with the rotary latch. This means that, for example, an electric motor drive with a corresponding gear as a torque converter is designed as a separate module and the separate module is connected, for example by means of a Bowden cable with a lock housing of the castle. The Bowden cable soul can then be connected, for example, with a Zuziehklinke, the Zuziehklinke can act directly on the catch. The closing pawl is then pivotally mounted in the lock, in such a way that the closing pawl can be brought into engagement with the catch via the Zuziehweg.

However, it is also conceivable that the closing device is integrated directly on the lock or even in the lock. It is conceivable, for example, that the electric drive and the torque converter, for example in the form of a transmission, are directly connected to the rotary latch. For this purpose, for example, an electric motor interact with a spindle drive, wherein the spindle drive moves the closing pawl. The closing pawl can be arranged pivotably in this case in the lock, that the closing pawl can be brought into engagement with the catch via the closing path.

As a torque converter, for example, serve a transmission or a mechanism with which at least different forces or moments in the catch can be introduced. In this case, the torque converter makes it possible to generate at least regionally, that is to say a torque which can be changed over the closing stroke, so that the rotary latch can be acted upon by different forces or moments.

The closing is done at least partially by means of a frictional connection. This means that during the electromotive tightening at least over a part of the closing movement and preferably over a first part of the closing mechanism is designed such that a releasable connection between, for example, a closing pawl and the rotary latch can be produced. In other words, between the closing pawl and the catch a connection can be made, which can be prevented. Thus, for example, the traction when pulling the catch can be overcome by an operator of the motor vehicle manually grasping a door or flap and thus overcomes the frictional connection, whereby a pulling is interruptible.

In one embodiment of the invention, there is an advantage if, in a first closing movement of the rotary latch, the closing device is able to introduce a closing torque into the rotary latch by means of a frictional connection, and if in the second closing movement of the rotary latch, the closing device is able to introduce a closing torque into the rotary latch by means of a positive connection , The combination of a first closing movement by means of a frictional connection and a second closing movement by means of a positive connection, a secure closing can be achieved over longer distances or Zuziehbewegungen. The closing takes place in the first region of the closing movement by means of a frictional connection and can be prevented, for example, by the operator or a device which prevents the door or flap from closing. Thus, for example, a coat or a hand can be located in the region of the door or flap, and this preventing means then prevents further tightening by overcoming the frictional connection and interrupting the closing process. Only when a positive connection between the rotary latch and the closing device has occurred in a second region of the closing movement, the closing movement is no longer interruptible. In the first area thus an easily interruptible closing is possible, whereas in the second area by means of the positive locking a closing against the force, for example, a door or flap seal is made possible or is possible.

If the rotary latch has a main latching position, in particular a latching position and a main latching position, wherein the latching latch can be brought into engagement with the rotary latch independently of the latching position, this results in a further advantageous embodiment variant of the invention. In an advantageous manner, the closing pawl can also already be brought into engagement with the rotary latch if no latching position of the rotary latch has yet been reached. In this case, for example, the door or flap or sliding door would be ajar, but not yet locked with the locking mechanism of the castle. This makes it possible to move the catch over a large area and thus to close the door or flap over a large Zuziehbereich means of Zuzieheinrichtung.

The closing device can have a closing pawl, wherein the closing pawl can be brought into engagement with the rotary latch. In addition, the Zuzieheinrichtung may have a Bowden cable and / or a transmission. In both cases, advantageous embodiments of the invention, wherein the closing pawl provides a structurally simple way to produce on the one hand a frictional connection and on the other hand a positive connection between the closing pawl and rotary latch. In addition, it is also conceivable that the frictional connection can be produced by a connection between the electromotive drive and the transmission and a Bowden cable. In other words, the connection between the Bowden cable and the Bowden cable core and the transmission can be configured such that there is a positive connection over a first closing range, ie a first closing movement, whereas a positive locking between the transmission and the Bowden cable core takes place via a second closing range or the second part of the closing movement can be produced.

The frictional connection in the closing device can be generated by means of the Bowden cable and / or by means of the transmission and / or by means of the closing pawl. Achieving the frictional connection in the closing device is therefore not bound to the combination of the means, but can also be achieved from a combination of the components present in the closing device or in the lock. In the transmission, for example, a Slip clutch present, the Bowden cable can be driven by a semi-positive connection and the closing pawl, for example, be formed such that there is only a frictional connection between Zuziehklinke and rotary latch via a first Zuziehweg. The combination of frictional engagement and positive engagement then makes it possible, in the closing device, to produce on the one hand a frictional connection and on the other hand a form fit.

In one embodiment of the invention, the closing moment in the first closing movement is less than the closing moment in the second closing movement. The division of the in the closing movement and an adaptation of the transferable forces or moments in the different movements of Zuzieheinrichtung makes it possible here that even with low forces a pulling can be prevented. In particular in the area of frictional connection, that is to say in the first closing movement, the door can then be pulled by means of a very small moment, with the result that, for example, an operator of the motor vehicle, including a child, is able to do so even with very small forces to stop or stop the closing movement in the first part of the closing. If the closing movement is interrupted in the first part of the closing movement, the closing device is disengaged, the adhesion is overcome and the door and / or flap can be opened.

In one embodiment of the invention, a closing force of about 100 newtons and in a second closing movement, a closing force of about 500 Newton can be generated by means of the closing device in the first closing movement or can be provided by means of the closing device. A small force to pull during the frictional transmission of the force in the closing device allows a slight interruption of the closing process, for example, by a child's hand. Pinching during the closing and in particular during the first part of the closing movement can thus be ensured. The very low forces of 80 to about 120 Newton make it possible here that although a door or flap is movable, but an interruption of the closing movement is easily possible. Only in the second part of the closing movement is pulled with high force of about 500 Newton or a torque introduced into the catch, so that even in the force of, for example, a door or flap seal a secure closing of the door and a transfer to a main rearing position is possible.

Advantageously, a closing movement of the rotary latch can be initiated by reaching an engagement of the rotary latch in a lock holder, which constitutes a further embodiment of the invention. Regardless of the respective locking position, the closing movement is generated by means of the closing device and by means of the rotary latch. Thus, if the rotary latch with the lock holder, the lock holder bolt or a striker in operative connection, so by means of the catch a Zuziehbewegung the door or flap can be initiated or initialized. If the rotary latch is already driven by an electric motor or driven indirectly by means of the closing device at this point in time, then a closing movement can be driven by an electric motor over a very wide closing region of the door, that is to say automatically. In this case, the closing movement is not tied to the achievement of a detent position, that is to say a pre-detent position or a main detent position of the locking mechanism, but can already be initialized upon reaching the lock holder by means of the rotary latch.

Is the first closing movement from reaching an intervention of the catch in a lock holder up to a closed position of 4 mm is executable. The tightening of the catch into the lock holder to a position where the door or flap is already closed to 4 mm, provides maximum safety. During the first closing movement there is only a frictional connection, so that the closing movement can be interrupted up to a closing range of 4 mm. Only in a closed position of 4 mm then engages the positive locking in the second Zuziehbewegung. 4 mm form a gap on the door or flap, which prevent intervention, for example by means of a hand or a finger. In a closed position of 4 mm thus the positive Zuziehakt can be done, creating a maximum of security for the operator of the motor vehicle can be achieved. The gap in relation to the reaching of the rotary latch in the engagement area with the lock holder, however, can vary and varies depending on the design of the motor vehicle. It is conceivable, however, that the intervention of the rotary latch engages at a gap of 25 mm, preferably 20 mm and more preferably 15 mm and most preferably at a gap of 10 mm. The first closing movement can therefore draw gaps of more or less than 20 mm by means of a non-positive movement, without any risk to the operator's safety. The inventive design of Zuzieheinrichtung also allows a structurally favorable and cost-effective solution of the tightening, since largely the same components can be used, with part and depending on the embodiment, only structural changes to modify existing components.

The invention will be explained in more detail with reference to the accompanying drawings with reference to an embodiment. It applies however, the principle that the embodiment does not limit the invention, but merely represents an embodiment. The illustrated features may be performed individually or in combination with other features of the specification as well as the claims individually or in combination.

• 1 eine prinzipielle Darstellung eines Teils einer Zuzieheinrichtung in einem Kraftfahrzeugschloss mit einem Gesperre mit einer Vorrast und einer Hauptrast, und
• 2 ein Kraftwegdiagramm mit einer Darstellung eines Kräfteverlaufs über eine erste Zuziehbewegung und eine zweite Zuziehbewegung.

It shows:

• 1 a schematic representation of a part of a Zuzieheinrichtung in a motor vehicle lock with a locking mechanism with a pre-rest and a main rest, and
• 2 a Kraftwegdiagramm with a representation of a course of forces over a first Zuziehbewegung and a second Zuziehbewegung.

In the 1 is part of a motor vehicle lock 1 played. Shown is a locking mechanism 2 from a rotary latch 3 , a pre-ratchet pawl 4 and a main latch 5 , The catch 3 is about an axis 6 and pawls 4 . 5 around an axis 7 pivotally mounted. To reach a closed position is the catch 3 around the axis 6 in the direction of the arrow P pivotally, for example, in a lock plate of the motor vehicle lock 1 storable. Shown in the 1 the pre-locking position, wherein the Vorrastsperrklinke 4 with a locking contour 8th at the rotary latch 3 can be brought into engagement.

Shown is still as part of the closing device 9 a closing pawl 10 , a recording 11 , a traction device 12 and a bowden cable soul 13 , wherein the traction means 12 and the Bowden cable soul 13 Part of a Bowden cable 12 . 13 could be. The closing pawl 10 is pivotable over a Zuziehweg Z taken in the motor vehicle lock. The Zuziehweg Z is as a dotted line and as a circular arc in the 1 located. Also shown is the lock holder 14 , the lock holder 14 in the pre-locking position already with the catch 3 engaged.

The closing pawl 10 as well as the catch 3 can each have a contour 15 . 16 have, which is designed such that with a reaching the rotary latch 3 with the lock holder 14 a traction, that is, for example, only a frictional connection between Ziehiehklinke 10 and catch 3 can be produced. On the one hand, the rotary latch contour 15 but also the Zuziehklinkenkontur 16 be designed such that in a first Zuziehweg a frictional connection can be achieved, whereas on a second Zuziehweg a positive connection is achieved.

In the 2 is a diagram shown, the Zuziehweg Z in millimeters on the closing force in Newton is reproduced. Entered is a pre-rest position VR and a main stop position MR , In addition, there is an overstroke position ÜH re-entered, as the Zuzieheinrichtung 9 moved the catch into an overstroke position, so that the main latch 5 in the locking contour 8th can intervene. A pre-locking position is usually at a door gap of about 6 mm. In the main position the door is closed. The overstroke position indicates the path of the catch, which the catch travels over the main catch position, so that the pawl 5 in the locking contour 8th the catch 3 can come up. In this embodiment and the embodiment of the 1 is a locking mechanism 2 with two pawls 4 . 5 played. It is also conceivable, of course, that only a pawl 4 . 5 is present.

The Zuziehweg Z describes the path over which the Ziehiehklinke 10 the catch 3 driven by an electric motor. According to the invention, the closing pawl engages 10 already then, if the catch 3 with the lock holder 14 has come into engagement. In the in the 2 Diagram shown is a Zuziehweg Z of 10 mm plus an overstroke. The closing pawl 10 moves the catch 3 in the direction of the arrow P about a Zuziehweg of a door gap of 10 mm to a door gap of 4 mm. This is the catch 3 moved with a force of 100 Newton or moved into the closed position. The Kraftwegverlauf is denoted by K in the diagram. The course of the force path over the imposition of a door gap of 4 mm until the door closes in the main catch or in an overstroke ÜH in is denoted by FO in the diagram.

How clear from the 2 it can be seen, the Zuziehbewegung invention is not at the locking positions VR . MR bound. Rather, it is conceivable according to the invention, the adhesion so far in the direction of the main detent position MR to lay in that the door or flap is already closed for the most part. Only when large forces to close, for example against the pressure of a door seal, are necessary, a positive connection FO between closing latch 10 and catch 3 generated, whereby a safe closing and holding the catch is possible.

In addition, the force paths of the known from the prior art Zuzieheinrichtungen are entered in the diagram. A Zuziehbewegung according to a progressively increasing force or a progressively increasing moment is with the line of force 17 and an indirectly introduced with the pre-restraining force to the overstroke with the line of force 18 entered in the diagram.

LIST OF REFERENCE NUMBERS

1

Motor vehicle lock

2

ratchet

3

catch

4

Vorrastsperrklinke

5

Main catch pawl

6.7

axis

8th

catch contour

9

power closing

10

tightening pawl

11

admission

12

traction means

13

Bowden cable

14

Castle holder

15

Rotary latch contour

16

Zuziehklinkenkontur

17, 18

Lines of force

P

arrow

Z

Zuziehweg

VR

first position

MR

primary position

ÜH

blowout

K

traction

FO

form-fit

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10140365 A1 [0003]
• DE 19828040 B4 [0005]
• DE 202008015089 U1 [0006]

Claims (10)

Lock (1) for a motor vehicle comprising a locking mechanism (2) comprising a rotary latch (3) and at least one pawl (4, 5), a closing device (9), an electric drive, and a torque converter, wherein the torque converter converts a variable torque in the closing device (9) is adjustable, characterized in that the closing at least partially by means of a frictional connection (K) can be achieved. Lock (1) to Claim 1 , characterized in that in a first closing movement of the rotary latch (3) the closing device (9) a closing moment by means of a frictional connection (K) in the rotary latch (3) can be introduced, and that in a second closing movement of the rotary latch (3) the closing device ( 9) a Zuziehmoment by means of a positive connection (FO) in the rotary latch (3) can be introduced. Lock (1) to Claim 2 , characterized in that the rotary latch (3) has a main latching position (HR), in particular a pre-latching position (VR) and a main latching position (HR), wherein the closing pawl (10) is independent of the latching position (VR, HR) with the catch ( 3) is engageable. Lock (1) to Claim 1 to 3 , characterized in that the closing device (9) has a closing pawl (10) and the closing pawl (10) can be brought into engagement with the rotary latch (3). Castle (1) after one of Claims 1 to 4 , characterized in that the closing device (9) has a Bowden cable (12, 13) and / or a transmission. Castle (1) after one of Claims 1 to 5 , characterized in that the motor vehicle lock (K) of the closing device (9) by means of the Bowden cable (12, 13) and / or by means of the transmission and / or by means of Zuziehklinke (10) can be generated. Castle (1) after one of Claims 2 to 6 , characterized in that the Zuziehmoment in the first closing movement is less than the Zuziehmoment in the second Zuziehbewegung. Castle (1) after one of Claims 1 to 7 , characterized in that by means of the closing device (9) in the first Zuziehbewegung a closing force of 100 Newton and in the second Zuziehbewegung a closing force of 500 Newton is available. Castle (1) after one of Claims 1 to 8th , characterized in that a closing movement of the rotary latch (3) with a reaching an engagement of the rotary latch (3) in a lock holder (14) can be introduced. Castle (1) after one of Claims 2 to 9 , characterized in that the first closing movement from reaching an engagement of the rotary latch (3) in a lock holder (14) is executable up to a closed position of 4 mm.

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