EP0472043B1 - Door lock for motor vehicle - Google Patents

Description

The invention relates to a motor vehicle door lock with a housing which has a cover, and with an actuator of a securing device which is arranged on the housing.

Such a motor vehicle door lock is previously known from DE-PS 35 26 501. There, the motor vehicle door lock has a housing that u. a. has a cover. An electric servomotor of a central locking system is provided as the actuator of a security device. This servomotor is arranged inside the housing, covered by the cover, and is inaccessible from the outside.

However, this known arrangement of the actuator of a safety device inside a motor vehicle door lock housing has disadvantages. This arrangement of the actuator within the housing is expensive to manufacture and manufacture, since the actuator must also be installed in the housing during assembly of the large number of mechanical parts of the door lock, in particular the laying of the supply line, for example, required for the power supply, is complex. This makes the production of the entire motor vehicle door lock complex and also increases the production costs unnecessarily.

The arrangement of the actuator in the interior of the housing is space-consuming, since a space must be provided for the actuator in the interior of the housing, which can be difficult in the arrangement of the large number of mechanical components. Especially when using a pneumatic actuator with a correspondingly large one Space requirements can lead to an increase in the size of the entire motor vehicle door lock and to installation problems in motor vehicle doors.

Finally, the arrangement of the actuator in the motor vehicle door lock housing is also maintenance and repair unfriendly, since, for. B. to repair a defective actuator, the opening of the housing and the at least partial disassembly of the motor vehicle door lock is necessary.

The invention has for its object to provide a simple and inexpensive motor vehicle door lock that takes up little space and is easy to repair.

This object is achieved in that the actuator is arranged on the cover and that the actuator housing is at least partially integrally formed with the cover.

Because the actuator is arranged on the cover, it can, for. B. designed for repair and maintenance work accessible from the outside. These measures according to the invention further simplify production and reduce the cost involved, since the assembly of the large number of mechanical parts can take place first in the remaining housing part of the motor vehicle door lock. Then the cover, which is required anyway, can be placed together with the actuator on the remaining housing of the motor vehicle door lock and connected to this housing part. Due to the construction of the motor vehicle door lock according to the invention, it is not necessary to lay supply lines for supplying the actuator inside the motor vehicle door lock housing.

Due to the at least partially one-piece design of the actuator housing with the cover, the space required for the actuator can be significantly reduced compared to the prior art, since a migration of the cover acts as an actuator in the housing part at the same time. This is particularly advantageous when using pneumatic actuators of pneumatic central locking systems, since these actuators require a comparatively large amount of space and, like the cover hoods, are often injection molded from plastic. In addition, this measure according to the invention also reduces the cost of manufacturing the motor vehicle door lock according to the invention, since, for. B. less plastic mass is required to spray the housing parts of the actuator and the cover. Due to the direct connection of the actuator to the cover by the at least partially one-piece design of the actuator housing with the cover, the dimensional accuracy of the parts is also favorably influenced, so that when the cover is placed on the rest of the housing part of the motor vehicle door lock, a secure engagement z. B. the actuating rod of a pneumatic actuator is guaranteed in the other lock parts.

Overall, the motor vehicle door lock according to the invention is simpler and cheaper to manufacture than the known, requires less space and is easier to maintain and repair due to the accessibility of the actuator from the outside even when the motor vehicle door lock housings are closed.

Advantageous refinements and developments of the motor vehicle door lock according to the invention result from the features of the subclaims.

In order to enable the above-mentioned simple accessibility of the actuator for maintenance and repair purposes from the outside in a particularly simple manner when the motor vehicle door lock housing is closed, it is particularly advantageous if the actuator housing part facing the other door lock housing is formed in one piece with the cover hood. In this case, the actuator housing part which is formed in one piece with the cover hood can have a guide for an actuating rod of the actuator which is also in particular formed in one piece with the cover hood. As a result, in particular during assembly, but also during operation of the motor vehicle door lock, a deflection of the actuating rod out of the guide level and thus a malfunction of the motor vehicle door lock according to the invention can be avoided.

The actuator of the motor vehicle door lock can advantageously be a pneumatic actuator. Such pneumatic actuators are often used in motor vehicles as part of pneumatic central locking systems. So far, an arrangement of pneumatic actuators on the housings of motor vehicle door locks has not taken place essentially because, because of the comparatively large space requirement of the pneumatic actuators, this combination would have increased the space requirements of the door locks. This is now possible with the motor vehicle door lock according to the invention. In this context, the actuator housing part, which is formed in one piece with the cover hood, can advantageously have a particularly circumferential groove for receiving a bead of a membrane of the pneumatic actuator. This is particularly useful because it is possible with this measure, e.g. B. after the final assembly of the mechanical parts of the motor vehicle door lock to connect the cover with the rest of the door lock housing and then in the insert the remaining parts of the pneumatic actuator for the opening provided for the pneumatic actuator and assemble the actuator. In this context in particular, it is particularly advantageous if another actuator housing part is formed by a cover (10), which can be latched in particular to the actuator housing part formed in one piece by latching means. Through these measures, a complete structural assembly of the actuator on the cover can then take place, so to speak, this assembly can be carried out both with the cover attached to the motor vehicle door lock and with the cover separated from this door lock, which is necessary for the assembly of the motor vehicle according to the invention. Door lock allows appropriate freedom with regard to the assembly process.

If the actuator used is a pneumatic actuator, the cover can advantageously have a pressure connection piece for connecting the actuator to the pneumatic control unit. The cover can also advantageously have an electrical switch for detecting the actuator position. Such switches are often provided in the actuators to provide feedback of the end positions of the actuator and thus the closed state of the motor vehicle door lock z. B. to enable the central locking system. The arrangement of the switch in the cover is advantageous because in this arrangement, as for the actuator for the switch, no electrical leads have to be installed in the motor vehicle door lock housing. The switch can then almost directly detect the actuator position, for example on the membrane of a pneumatic actuator. Likewise, a part of an electrical plug connection, in particular a plug, can be arranged in the cover, which is advantageously formed together with the switch and thus makes the use of electrical lines from the switch to the plug unnecessary.

The last-mentioned development of the motor vehicle door lock according to the invention is also particularly advantageous if the actuator is an electromagnetic actuator which is to be connected to a power source by means of electrical connections. Such electromagnetic actuators can be servomotors or solenoids of electromotive or electromagnetic central locking systems. Such actuators can also, for. B. solenoids of anti-theft systems, as they are known from DE-PS 36 27 036. Such actuators of anti-theft systems can certainly be designed together with actuators from the central locking systems according to the present invention.

Since electromagnetic actuators, compared to pneumatic actuators, are sensitive to the effects of moisture and dust, it is particularly advantageous if the actuator housing part, which is formed in one piece with the cover, has a particularly sealed passage for an actuating rod of the actuator. With these measures, the penetration of moisture and dust from the motor vehicle door lock side into the electromagnetic actuator can be prevented.

For the electrical connection of the electromagnetic actuator to a power source, it is particularly advantageous if the actuator has first electrical connection lugs which are directed towards the cover and if the cover or the plug has second electrical connection lugs which engage in slots in the first connection lugs. With these measures, according to the solution for a pneumatic actuator, it is possible to completely assemble the electromagnetic actuator on the cover by first putting the electromagnetic actuator into the corresponding one Countersinking of the housing part formed integrally with the cover is inserted and then the housing of the actuator is formed in that the cover is placed together with the plug on the cover so that the first connecting lugs encompass the second connecting lugs. An additional complex wiring of the electromagnetic actuator with the plug or with the other parts of the electromagnetic or electromotive central locking systems is then omitted.

If further electrical switches are provided within the motor vehicle door lock according to the invention, it is particularly advantageous to also arrange them on the cover hood in order to reduce the wiring and assembly work here as well. The housing parts and / or the cover hood can be injection molded from plastic in a particularly advantageous manner, because this is a particularly simple and inexpensive solution and also enables the design of complicated shapes of the cover hood and housing parts.

An embodiment of a motor vehicle door lock according to the invention is shown in the drawings and is explained in more detail below with reference to the drawings.

• Figur 1 einen erfindungsgemäßen Kraftfahrzeug-Türverschluß mit einer Abdeckhaube, die im Bereich eines pneumatischen Stellglieds einer Zentralverriegelung und eines elektromagnetischen Stellglieds einer Diebstahlsicherungsanlage teilweise geschnitten ist.
• Figur 2 das elektromagnetische Stellglied der Diebstahlsicherungsanlage gemäß Figur 1 in einer zweiten Ansicht und
• Figur 3 dasselbe elektromagnetische Stellglied in einer dritten Ansicht.

Show it

• Figure 1 shows a motor vehicle door lock according to the invention with a cover which is partially cut in the area of a pneumatic actuator of a central locking system and an electromagnetic actuator of an anti-theft system.
• Figure 2 shows the electromagnetic actuator of the anti-theft system according to Figure 1 in a second view
• Figure 3 shows the same electromagnetic actuator in a third view.

In FIG. 1, the motor vehicle door lock according to the invention has a cover (1) which is connected to another door lock housing (4) by known latching means. A first actuator (2) of a pneumatic central locking system is arranged on the cover (1), the first actuator housing part (3) of which is injection-molded in one piece with the plastic cover.

The first actuator housing part (3) of the first actuator (2) has a guide (5) for a first actuating rod (6) of the pneumatic first actuator (2), which is also molded in one piece with the first actuator housing part (3) from plastic. A circumferential groove (7) is also provided in the first actuator housing part (3) or in the corresponding part of the cover (1), for receiving a membrane bead (8) of the membrane (9) of the first pneumatic, which is made of an elastic material, in particular rubber Actuator (2).

A second actuator housing part of the first pneumatic actuator (2) is formed by a cover (10) which is detachably connected to the first actuator housing part (3) or the cover (1) by latching means (11) for assembly and repair purposes, if necessary. To supply the first pneumatic actuator (2) with pneumatic overpressure and underpressure from the pneumatic overpressure and underpressure source of the central locking control unit, the cover (10) has a pressure connection piece (12). An electrical switch (13) is also provided, which the actuator position, that is, the position of the actuating rod (6) and thus the membrane (9) optionally scans via a bell crank. This electrical switch (13) is designed in one piece with a plug (14) and can be inserted together with the plug (14) into a corresponding opening in the cover (10).

Furthermore, the motor vehicle door lock according to the invention additionally has a second actuator (15) of an electromagnetic anti-theft system. To protect this second electromagnetic actuator against moisture and dirt, the first actuator housing part (3) of the second actuator (15) has a sealed bushing (16) for a second actuating rod (17) of the second actuator (15).

For the electrical connection of the second actuator (15) to a power source, the second actuator (15) has first electrical connection lugs (18) which surround second electrical connection lugs (19), which in turn are arranged on the plug (10). On the right in FIG. 1, an electrical connection (20) is provided for further electrical switches, which are also arranged in the cover (1).

In FIG. 2, the same or equivalent device parts as in FIG. 1 are provided with the same reference numerals. It can be seen that the first connecting lugs (18) have slots (21) for receiving the second connecting lugs (19).

In Figure 3, in which the same or equivalent device parts as in Figures 1 and 2 are provided with the same reference numerals, the position of the first electrical lugs (18) and thus the slots (21) relative to the second actuating rod (17) can be seen .

The motor vehicle door lock according to FIGS. 1 to 3 is assembled as follows:

First, all mechanical parts of the motor vehicle door lock, such as a plurality of levers and rotary connections, can be mounted in the remaining door lock housing part (4). Before, after or in parallel to this, the cover (1) with the first actuator and the second actuator (15) can be mounted, for example by first of all the membrane (9) with its membrane bead (8) in the circumferential groove (7) of the cover inserted and the adjusting rod (6) is pushed into the guide (5). Then the solenoid of the second actuator (15) is inserted into the corresponding depression of the first actuator housing part (3). Then the plug (14) is inserted together with the second connecting lugs (19) and the electrical switch (13) into the corresponding opening in the cover (10). The cover with plug (14), switch (13) and second electrical connection lugs (19) can then be pressed onto the cover (1) in such a way that the second connection lugs (19) into the slots (21) of the first electrical connection lugs (18 ) are pressed in, the bead (8) is pressed into the groove (7) and the cover (10) is locked with the cover (1) by means of the locking means (11). Finally, the cover (1) is locked with the rest of the door lock housing (4) and the motor vehicle door lock according to the invention is fully assembled.

It can be seen from the above-described assembly process that, despite the complexity of the motor vehicle door lock according to the invention, due to the measures provided according to the invention, the multitude of parts to be assembled can be comparatively easily and flexibly assembled in the assembly process.

Claims (14)

1. Motor vehicle door closure having a housing with a cover panel, and having an actuator for a protective device disposed on the housing, characterised in that the actuator (2, 15) is disposed on the cover panel (1) and that the actuator housing (3) is at least partially of integral construction with the cover panel (1).
2. Motor vehicle door closure according to claim 1, characterised in that the part of the actuator housing (3) that faces the rest of the door closure housing (4) is of integral construction with the cover panel.
3. Motor vehicle door closure according to claim 2, characterised in that the part of the actuator housing (3) that is of integral construction with the cover panel (1) incorporates a guide (5) for a control rod (6) of the actuator (2), said guide more particularly being of integral construction with the cover panel (1).
4. Motor vehicle door closure according to claim 1, characterised in that the actuator is a pneumatic actuator (2).
5. Motor vehicle door closure according to claim 2 and claim 4, characterised in that the part of the actuator housing (3) that is of integral construction with the cover panel (1) has a groove (7), more particularly a peripheral groove, for locating a bead (8) on a diaphragm (9) of the pneumatic actuator (2).
6. Motor vehicle door closure according to claim 1, characterised in that another part of the actuator housing is formed by a lid (10) which more particularly is adapted to be latched by latching means (11) with the part of the actuator housing (3) that is of integral construction.
7. Motor vehicle door closure according to claim 4 and claim 6, characterised in that the lid (10) incorporates a pressure connection fitting (12).
8. Motor vehicle door closure according to claim 6, characterised in that an electrical switch (13) for detecting the position of the actuator is arranged in the lid (10).
9. Motor vehicle door closure according to claim 6, characterised in that part of an electrical plug-in connection, more particularly a plug (14), is arranged in the lid (10).
10. Motor vehicle door closure according to claim 1, characterised in that the actuator is an electromagnetic actuator (15).
11. Motor vehicle door closure according to claim 2 and claim 10, characterised in that the part of the actuator housing (3) that is of integral construction with the cover panel (1) incorporates a passage (16) for a controd rod (17) of the actuator (15), more particularly a sealed passage.
12. Motor vehicle door closure according to claims 6, 9 and 10, characterised in that the actuator (15) incorporates first electrical terminal lugs (18) which are directed towards the lid (10) and in that the lid (10) or the plug (14) incorporates second electrical terminal lugs (19) which engage in slots (21) in the first electrical terminal lugs.
13. Motor vehicle door closure according to claim 1, characterised in that additional electrical switches (20) are provided on the cover panel.
14. Motor vehicle door closure according to one or more of the preceding claims, characterised in that the housing parts and/or the cover panel are injection-moulded from plastic.

Images