DE202015104678U1 - Motor vehicle lock - Google Patents

Abstract

Motor vehicle lock arrangement with a motor vehicle lock (2), wherein the motor vehicle lock arrangement (1) a first closing element (3, 3a), in particular a latch (3a), and as a pawl (4) ausgestaltetes closing element for holding the first closing element (3, 3a) in at least one holding position and a shape memory drive (6) for lifting the pawl (4), wherein the shape memory drive (6) has a shape memory arrangement (7) with at least one shape memory element (8) for lifting the pawl (4) by a change in shape of the shape memory element (8 ), wherein a restoring device (12) is provided for manually resetting the change in shape of the shape memory element (8) which causes the pawl (4) to lift, characterized in that the restoring device (12) has a restoring element (13) via which for the manual reset of the shape memory element (8) a restoring force in the shape memory element (8) can be introduced and that the return element (8) for this purpose from outside the motor vehicle lock (2) is accessible.

Description

The invention relates to a motor vehicle lock arrangement with a motor vehicle lock according to the preamble of claim 1 and a motor vehicle lock arrangement with a motor vehicle lock according to the preamble of claim 13.

Motor vehicle lock arrangements and motor vehicle locks are known from the prior art in various designs.

In the DE 20 2013 007 862 U1 is a motor vehicle lock with the closing elements lock latch and closing element described. In the motor vehicle lock, the pawl holds the latch in a closed position and can be dug with an example designed as an electric motor main drive for normal operation lifting or an auxiliary drive for emergency lifting. The auxiliary drive is formed by a shape memory arrangement with at least one shape memory element, by the change in shape, the pawl is dug. The motor vehicle lock may have a restoring device, not described in more detail, for the manual or automatic resetting of the shape change of the shape memory element causing the lifting of the pawl. An emergency-related lifting represents in the known motor vehicle lock, in particular depending on the realization of the provision of additional effort, which can be seen as a loss of comfort.

The invention has for its object to design the known motor vehicle lock assembly in such a way and further that the additional effort associated with the function of the emergency lifting of the pawl for the user is reduced.

The above object is achieved in a motor vehicle lock assembly according to the preamble of claim 1 by the features of claim 1.

Due to the accessibility of the restoring element from outside the motor vehicle lock, the provision of the shape memory element can basically be accomplished with little effort. As a result, the motor vehicle lock can be easily converted into a ground state after an emergency lifting of the pawl.

According to a development of the invention according to claim 2, the restoring element is designed in the manner of a slider and / or in the manner of a lever. In this way, the reset function is particularly easy to implement. The restoring force is thereby particularly easily introduced into the shape memory element. At the same time, the restoring element can easily be designed in such a way that, as proposed, it is accessible from outside the motor vehicle lock. In addition, the return movement can be performed defined in this way.

In an embodiment of the motor vehicle lock arrangement according to claim 3, the provision of the shape memory element can be carried out particularly easily with the aid of a tool.

A good protection of the motor vehicle lock against environmental influences at the same time good accessibility from the outside is achieved by the features of claim 4.

In a design of the motor vehicle lock according to claim 10, a particularly simple and safe shutdown of the shape memory element after the lifting of the pawl can be achieved.

According to another teaching, which has independent significance, the above object is achieved in a motor vehicle lock assembly by the features of claim 13.

By providing a control arrangement which switches for lifting the pawl from the main drive to an auxiliary drive, when the stored energy in an energy storage for electrically supplying the main drive energy falls below a predetermined threshold, even in a very heavily emptied energy storage still a safe lifting of Pawl be ensured by the auxiliary drive. There is no danger that initially with the main drive is trying to lift the pawl and then no longer sufficient energy is available for a lifting operation with the auxiliary drive. Furthermore, it is ensured that a lifting of the pawl actually only takes place in an emergency, so that a provision of the shape memory element and the associated additional effort for the user is largely avoided.

The term "emergency" in this case summarizes those situations that may affect the normal operation of lifting the pawl. This can be, for example, a crash situation in which greater forces must be applied than in normal operation to lift the pawl. Such an emergency can be recognized, for example, that the main drive was indeed driven to lift the pawl, but this has not dug. Alternatively, however, such an emergency can also be detected by an acceleration sensor. Another emergency may be present, if only a small amount of energy is available, so that for safety's sake the auxiliary drive is used directly for the last lifting operation.

Preferably, the supply voltage is used as a measure of the amount of energy. This represents a particularly simple and inexpensive to be measured size, which determines the amount of energy safely. This motor vehicle lock arrangement can also have all the features described in this application individually or in combination. In this respect, reference is made to the entire description of the application and the claims.

An embodiment of a proposed motor vehicle lock assembly will be described below with reference to a drawing. In the drawing shows

1a) a proposed motor vehicle lock arrangement with a motor vehicle lock housing and b) the motor vehicle lock arrangement without a motor vehicle lock housing, in each case in a perspective illustration,

2 a plan view of the motor vehicle lock assembly 1b in a closed position,

3 a plan view of the motor vehicle lock assembly 1b in an open position, wherein the pawl is dug with the main drive,

4 a plan view of the motor vehicle lock assembly 1b in an open position, wherein the pawl is excavated with the auxiliary drive.

1 shows a proposed motor vehicle lock assembly 1 , The motor vehicle lock arrangement 1 has a motor vehicle lock 2 for holding a motor vehicle door. The motor vehicle lock arrangement in question 1 Applies to all types of motor vehicle doors of a motor vehicle. The term "motor vehicle door" is to be understood broadly. It includes in particular side doors, rear doors, tailgates, trunk lids or hoods.

The motor vehicle lock arrangement 1 has a first closing element 3 , Here and preferably a lock latch pivotable about a latch axis A. 3a , and a pawl pivotable about a pawl axis B. 4 designed closing element 4 for holding the first closing element 3 . 3a in at least one holding position. In the exemplary embodiment, the motor vehicle lock 2 two stops, namely a main closing position and a Vorschließstellung on. In addition, here and preferably has the motor vehicle lock assembly 1 another closing element, the closing wedge 5 , on, in the usual way with the latch 3a interacts.

In an alternative, not shown embodiment, the motor vehicle lock assembly 1 also have a locking bolt, which for holding a motor vehicle door in the motor vehicle lock 2 dips in and is held there by the pawl. This can then be a first closing element 3 the motor vehicle lock assembly 1 form. With regard to this embodiment is based on the same to the same applicant German utility model application DE 20 2015 104 003 referenced, which is made in this respect the subject of this application.

Furthermore, the proposed motor vehicle lock arrangement 1 a shape memory drive 6 for lifting the pawl 4 on. The shape memory drive 6 has a shape memory arrangement 7 with at least one shape memory element 8th for lifting the pawl 4 by a shape change of the shape memory element 8th on. The 4 shows the motor vehicle lock assembly 2 with through the shape memory element 8th raised pawl 4 ,

Here and preferably, the shape memory drive 8th as auxiliary drive 9 for emergency lifting of the pawl 4 educated. In addition, he can drive a main 10 for normal operation according to lifting the pawl 4 exhibit. Here and preferably, the main drive 10 as electric motor 11 educated. The 3 shows the motor vehicle lock assembly 1 with through the main drive 10 raised pawl 4 ,

In addition, the proposed motor vehicle lock arrangement 1 a reset device 12 for manual reset of the lifting of the pawl 4 causing shape change of the shape memory element 8th on. The return device has a return element 13 on, about the purpose of resetting the shape memory element 8th a restoring force in the shape memory element 8th can be initiated. This is the reset element 8th from outside the motor vehicle lock 2 accessible.

A manual reset of the shape memory element 8th from the outside is made particularly simple by the proposed solution. Opening and / or dismantling parts of the motor vehicle lock 2 not necessary. This results in a cost-effective and at the same time easily recoverable motor vehicle lock 2 , In addition, the shape memory drive must also 6 not stronger be designed to any restoring forces when lifting the pawl 4 to overcome, such as when providing a shape memory element 8th associated return spring would be necessary. Therefore, the restoring device, in particular the shape memory drive as a whole, preferably designed without a spring.

Additionally or alternatively, it may nevertheless be provided that in the drive train between shape memory arrangement 7 and pawl 4 Springs are present, the sum of a force on the shape memory arrangement 7 exert in the return direction, which is less than the required restoring force for resetting the shape memory device after switching off the same. In this way it can be ensured that the pawl 4 for example, remains dug until manual reset and not immediately after switching off the shape memory arrangement 7 comes again. Such a spring may be one of the pawls 4 associated pawl spring act. Preferably, the force that the pawl spring is on the shape memory assembly 7 less than the required restoring force to return the shape memory assembly 7 after switching off the same.

An interesting feature of the proposed solution is the fact that in an emergency caused lifting of the pawl 4 through the shape memory drive 6 gives a holding effect, which ensures that the pawl 4 from the shape memory drive 6 is permanently held in its raised position until the above provision is completed. This in particular without further damage to the shape memory drive 6 , Such a holding effect is particularly advantageous in a weakening of the power supply, as a repeated lifting of the pawl 4 can be waived.

Here and preferably, the reset element 13 formed in the manner of a slider, in particular a linear slide. It is guided in a, in particular linear, not shown leadership.

Alternatively, the return element 13 also be designed in the manner of a lever, in particular a pivot lever. Even with a lever-like design, the provision of the shape memory element 8th done by a defined movement.

The manual return movement can substantially counter to the lifting movement by the shape memory element 8th and / or in the same direction with the lifting movement. Furthermore, the return movement substantially perpendicular to the lifting movement by the shape memory element 8th respectively. The return movement is preferably that movement, by means of which manually from outside the motor vehicle lock 2 the provision of the shape memory element 8th he follows.

The reset element 13 preferably has an attack surface 14 for initiating the restoring force. The motor vehicle lock 2 Otherwise, preferably has a support surface 15 for supporting the restoring force. Here and preferably have the attack surface 14 and the support surface 15 in opposite directions. It is thus easily possible over the attack surface 14 and the support surface 15 to initiate the restoring force by means of a pincer-like tool. This results in an overall particularly simple recovery of the shape memory element 8th ,

Here and preferably, the motor vehicle lock 2 with a housing 16 equipped, which has a housing opening 17 having. Preferably, the return element 13 , in particular its attack surface 14 , through the housing opening 17 accessible. Additionally or alternatively, the return element 13 , especially its attack surface 14 , in the housing opening 17 protrude and / or protrude through the housing opening. In this way, the interior of the motor vehicle lock 2 through the housing 16 be protected while the reset element 13 for returning the shape memory element 8th easily from outside the motor vehicle lock 2 is accessible. Preferably, the support surface 15 on the housing 16 educated. The distance between the support surface is 15 and the attack surface 14 before the recovery of the shape memory element 8th preferably at most 5 cm, more preferably at most 3 cm, in particular at most 2 cm.

To facilitate the provision with a tool, is on the housing, in particular through the housing opening 17 , an attack room 17a for engaging and returning the return element 8th provided with a tool.

In addition, the motor vehicle lock 2 a rear panel 18 have, which is preferably formed of a metal material. Preferably, the rear panel 18 on the housing 16 arranged or forms part of the housing 16 , On the rear panel 18 is the pawl 4 stored. In addition, also the first closing element 3 , in particular the lock latch 3a , on the rear panel 18 be stored. Preferably, the rear plate forms 18 also an inlet mouth 19 for one with the latch 3a interacting lock wedge 5 out. For storage of the pawl 4 and / or the lock latch 3a can or can one or more domes 20a . 20b at the rear panel 18 be arranged.

Preferably, the return element 13 on the rear panel 18 opposite side of the motor vehicle lock 2 accessible. The reset element 13 can alternatively also on the side of the back plate 18 be accessible. Furthermore, the return element 13 on a front side 16a of the motor vehicle lock 2 be accessible.

To a provision of the shape memory element 8th even when mounted in a motor vehicle door motor vehicle lock 2 to enable, is the reset element 13 accessible in this assembled state for manual reset. Preferably, the return element 13 when mounted in a motor vehicle door motor vehicle lock 2 for manual reset accessible only in the open state of the vehicle door. In addition, the reset element 13 from the pawl 4 be decoupled such that it is the shape memory element 8th while it can reset that pawl 4 by an adjustment of the return element 13 but can not be dug. This is advantageous in terms of theft protection.

In the illustrated embodiment, and preferably, the return element 13 a deflection guide for deflecting the shape memory element 8th on. Here is the shape memory element 8th , in particular U-shaped, in the deflection guide 21 of the return element 13 placed. The shape memory element 8th is by flipping around the deflection guide 21 on the return element 13 attached. This makes it particularly easy tolerance compensation between the two strands 8a . 8b of the shape memory element. Alternatively, the at least one shape memory element 8th also in another form on the return element 13 be attached, this particular non-positive and / or positive.

Preferably, the reset path of the return element corresponds 13 the adjustment of the return element 13 through the shape memory element 8th when lifting the pawl 4 , The adjustment path and / or the return travel are preferably limited by stops, not shown. The stops are preferably on the housing 16 formed, for example, on the housing cover 16b ,

Here and preferably, the housing has 16 an above rear panel 18 , a housing box 16a and a housing cover 16b on. Preferably, the rear panel 18 at the bottom of the housing box 16c arranged. The stops can be on the housing 16 , in particular on the housing cover 16b be arranged.

In the exemplary embodiment and preferably the shape memory element extends 8th parallel to the rear panel 18 , The motor vehicle lock 2 may be formed overall elongated, wherein the shape memory element 8th then substantially in the longitudinal direction of the motor vehicle lock 2 extends.

Preferably, the shape memory element intersects 8th the connecting line between the axis of rotation of the latch 3a and the axis of rotation of the pawl 4 , This allows the longest possible extension of the shape memory element 8th in the motor vehicle lock 2 be achieved. At the same time this results in a compact design.

Here and preferably, the shape memory arrangement 7 an insulation assembly for temperature insulation of the shape memory element 8th assigned. This is a reproducible operation of the shape memory drive even at different outside temperatures 6 guaranteed. Has proven particularly useful a sol-gel coating of the shape memory element 8th as an insulating arrangement.

In addition, the motor vehicle lock has 2 preferably via an electrical switching arrangement 22 that comes with reaching the release position of the pawl 4 the shape memory element 8th and / or the main drive 10 off. For this purpose, a position of the pawl 4 , In particular a holding position and / or a release position and / or a position of the lock latch 3a , in particular the open position and / or main closing position and / or the Vorrastschließstellung, with a sensor 22a respectively. 22b be recorded. In this way, an overload of the shape memory element 8th avoided. The sensor for detecting the pawl position 22a detects the position of the pawl 4 over a lever 22c ,

According to a further teaching, which has independent significance, the motor vehicle lock arrangement has 1 a control arrangement 23 relying on the operation of the shape memory drive 6 is designed towards. The control arrangement 23 switches to lift the pawl 4 from the main drive 10 on an auxiliary drive 9 when in an energy store to electrically power the main drive 10 stored energy amount falls below a predetermined threshold.

The motor vehicle lock arrangement 1 According to the further teaching may also have all the features described above, individually or in combination. In this respect, reference is made to the above description. In addition, both motor vehicle lock arrangements 1 have all the features described below individually or in combination.

The energy store may be the vehicle battery and / or a battery and / or an accumulator and / or a capacitor for operating the motor vehicle lock 2 be. In this respect, the energy store can be a network of energy stores, in particular also of different types. In particular, the network of battery storage can also be a dedicated to the motor vehicle lock 2 have assigned energy storage. Preferably, this is on or in the motor vehicle lock 2 arranged. In the energy storage but it can also be an exclusively the shape memory drive 6 act associated energy storage.

As a measure of the amount of energy preferably the supply voltage can be used. This allows a particularly simple and reliable determination of the amount of energy or the amount of residual energy. Here and preferably, the threshold value is chosen such that the amount of energy still stored for a final safe lifting of the pawl 4 sufficient.

Additionally or alternatively, the motor vehicle lock 2 preferably designed and set up such that the auxiliary drive 9 then switched on and possibly the main drive 10 is turned off when the power of the main drive 10 for lifting the pawl 4 not enough.

Further preferably, with the auxiliary drive 9 a greater lifting force on the pawl 4 applicable, as with the main drive 10 , As a result, in an emergency, a higher Aushebekraft than in normal operation on the pawl 4 be exercised. As a result, a particularly safe emergency-based lifting is possible. Furthermore, the main drive 10 and the auxiliary drive 9 be designed such that the main drive 10 the pawl 4 can lift faster than the auxiliary drive 9 ,

Here and preferably is an actuator 24 for lifting the pawl 4 provided, which in particular with the pawl 4 can be firmly connected. The actuator 24 and the pawl 4 preferably have a common axis of rotation. On the actuator 24 act to lift the pawl 4 preferably both the main drive 10 as well as the auxiliary drive 9 , For lifting the pawl 4 can the main drive 10 and the auxiliary drive 9 together on the actuator 24 act. Preferably, however, either the main drive acts 10 or the auxiliary drive 9 on the actuator 24 for lifting the pawl 4 one.

Between the shape memory arrangement 7 and the pawl 4 can a gearbox 25 be arranged. Alternatively or additionally, between the main drive 10 and the pawl 4 a main gearbox 26 be arranged.

Here and preferably, both between the shape memory arrangement 7 and the pawl 4 a gearbox 25 as well as between the main drive 10 and the pawl 4 a main gearbox 26 arranged. In the exemplary embodiment, the two gears 25 . 26 a common output gear member. Here and preferably, as here, the actuator 24 designed as a common output gear member.

The drive train of the main drive 10 has a flexible traction device 26a , in particular a rope on which the driving force on a backdrop 26b is transmitted. For this purpose, the flexible traction means 26a preferably directly to a shaft, in particular the motor shaft of the electric motor 11 wound. From the backdrop 26b the driving force is over an actuator 24 to be assigned lever 24a , which may be formed in particular as a wire, on the actuating element 24 and thus the pawl 4 transfer ( 3 ).

The scenery 26b and the lever 24a are coupled unidirectionally. The unidirectional coupling decouples the main drive 10 when lifting the pawl 4 with the auxiliary drive 9 produced.

The drive train of the auxiliary drive 9 or shape memory drive 6 transmits the driving force from the return element 13 over a lever 25a on the actuator 24 , The lever 25a and the actuator are unidirectionally coupled together. The unidirectional coupling decouples the auxiliary drive 9 when lifting the pawl 4 with the main drive 10 produced.

The actuator 24 and the pawl 4 are preferably over a wire, in particular the lever 24a forming wire, firmly connected.

The reset element 13 and the main gearbox 25 are located in different levels of the motor vehicle lock 2 , Further preferably, the closing elements are 3 . 3a . 4 in another level of the motor vehicle lock 2 , Here are the closing elements 3 . 3a . 4 in a plane directly on the rear panel 18 , In a level above it is the main transmission 25 arranged. In a plane arranged above the shape memory arrangement is arranged. The gear 25 from the shape memory arrangement to the pawl is located at least partially in the plane of the main gear 25 ,

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 202013007862 U1 [0003]
• DE 202015104003 [0022]

Claims (15)

Motor vehicle lock arrangement with a motor vehicle lock ( 2 ), wherein the motor vehicle lock arrangement ( 1 ) a first closing element ( 3 . 3a ), in particular a latch ( 3a ), and a pawl ( 4 ) configured closing element for holding the first closing element ( 3 . 3a ) in at least one holding position and a shape memory drive ( 6 ) for lifting the pawl ( 4 ), wherein the shape memory drive ( 6 ) a shape memory arrangement ( 7 ) with at least one shape memory element ( 8th ) for lifting the pawl ( 4 ) by a shape change of the shape memory element ( 8th ), wherein a reset device ( 12 ) for manual reset of the lifting of the pawl ( 4 ) causing shape change of the shape memory element ( 8th ), characterized in that the return device ( 12 ) a reset element ( 13 ), via which for the manual resetting of the shape memory element ( 8th ) a restoring force in the shape memory element ( 8th ) and that the return element ( 8th ) for this purpose from outside the motor vehicle lock ( 2 ) is accessible. Motor vehicle lock arrangement according to claim 1, characterized in that the return element ( 13 ) is designed in the manner of a slider and / or in the manner of a lever. Motor vehicle lock arrangement according to claim 1 or 2, characterized in that the return element ( 13 ) an attack surface ( 14 ) for introducing the restoring force and the motor vehicle lock ( 2 ) otherwise a support surface ( 15 ) for supporting the restoring force, preferably that the attack surface ( 14 ) and the support surface ( 15 ) in opposite directions, more preferably that over the attack surface ( 14 ) and the support surface ( 15 ) The restoring force by means of a forceps-like tool can be introduced. Motor vehicle lock arrangement according to one of the preceding claims, characterized in that the motor vehicle lock ( 2 ) a housing ( 16 ) with a housing opening ( 17 ) and the return element ( 13 ), in particular the attack surface ( 14 ), through the housing opening ( 17 ) is accessible and / or in the housing opening ( 17 ) and / or through the housing opening ( 17 ) protrudes through. Motor vehicle lock arrangement according to one of the preceding claims, characterized in that the motor vehicle lock ( 2 ) a back plate ( 18 ), on which the pawl ( 4 ) is stored, preferably the return element ( 13 ) on the rear panel ( 18 ) opposite side of the motor vehicle lock ( 2 ) is accessible. Motor vehicle lock arrangement according to one of the preceding claims, characterized in that the return element ( 13 ) when mounted in a motor vehicle door motor vehicle lock ( 2 ) is accessible for manual reset. Motor vehicle lock arrangement according to one of the preceding claims, characterized in that the return element ( 13 ) a deflection guide ( 21 ) for redirecting the shape memory element ( 8th ), preferably that the shape memory element ( 8th ), in particular U-shaped, around the deflection guide ( 21 ) of the return element ( 13 ) is placed. Motor vehicle lock arrangement according to one of claims 5 to 7, characterized in that the shape memory element ( 8th ) parallel to the rear panel ( 18 ). Motor vehicle lock arrangement according to one of the preceding claims, characterized in that the shape memory arrangement ( 7 ) an insulating arrangement for temperature insulation of the shape memory element ( 8th ), preferably that the insulating arrangement is a sol-gel coating. Motor vehicle lock arrangement according to one of the preceding claims, characterized in that the motor vehicle lock arrangement ( 1 ) a main drive ( 10 ) for normal operation according to lifting the pawl ( 4 ) and that the shape memory drive ( 6 ) as auxiliary drive ( 9 ) for emergency release of the pawl ( 4 ), preferably that the main drive ( 10 ) an electric motor ( 11 ). Motor vehicle lock arrangement according to one of the preceding claims, characterized in that the motor vehicle lock ( 2 ) an electrical switching arrangement ( 22 ), which with the achievement of a release position of the pawl ( 4 ) the shape memory drive ( 6 ), in particular the shape memory element ( 8th ), and / or turns off the main drive. Motor vehicle lock arrangement according to claim 11, characterized in that with the auxiliary drive ( 9 ) a greater Aushebekraft on the pawl ( 4 ) is applicable as with the main drive ( 10 ). Motor vehicle lock arrangement with a motor vehicle lock ( 2 ), wherein the motor vehicle lock arrangement ( 1 ) a first closing element ( 3 . 3a ), in particular a latch ( 3a ), and a pawl ( 4 ) configured closing element for holding the first closing element ( 3 . 3a ) in at least one holding position and a shape memory drive ( 6 ) for lifting the Pawl ( 4 ), wherein the shape memory drive ( 6 ) a shape memory arrangement ( 7 ) with at least one shape memory element ( 8th ) for lifting the pawl ( 4 ) by a shape change of the shape memory element ( 8th ), wherein the motor vehicle lock arrangement ( 1 ) a main drive ( 10 ), in particular an electric motor ( 11 ), for normal operation according to lifting the pawl ( 4 ) and the shape memory drive ( 6 ) as auxiliary drive ( 9 ) for emergency release of the pawl ( 4 ), characterized in that the motor vehicle lock arrangement ( 1 ) a control arrangement ( 23 ), which for lifting the pawl ( 4 ) from the main drive ( 10 ) to an auxiliary drive ( 9 ) switches when in an energy store for electrically supplying the main drive ( 10 ) stored energy amount falls below a predetermined threshold. Motor vehicle lock arrangement according to claim 13, characterized in that the supply voltage is used as a measure of the amount of energy. Motor vehicle lock arrangement according to Claim 13 or 14, characterized by the characteristic of one of the preceding claims.

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