EP1081321B1 - Motor vehicle door lock - Google Patents

Description

The invention relates to a motor vehicle door lock, with at least one rotary latch, a pawl and a Lock mechanism with a Zuziehhilfe for the catch, wherein the closing aid a rocker with a pivotally mounted Closing pawl and with an electromotive drive for the rocker with the closing pawl, which for transferring the catch from a pre-locking position or an intermediate position in a main position is incident against an attack surface on the catch and with the drive turned on the catch in the Main switch position transferred.

It is known such a motor vehicle door lock, in which the closing aid a drive motor and a from the drive motor to the rotary latch guided power train includes. In this power train is a manual disengageable clutch arranged, which always directly with the outside door handle of the relevant motor vehicle door lock connected as an actuator and can be unlatched at any time by pressing the outside door handle is (see DE 38 36 771). In addition to such an electromotive Zuziehhilfe is also known an electromotive Opening aid for the pawl (see DE 195 30 726). In In this case, the electric motor is due to an opening signal energized, which for example at the outside door handle is produced. A manual external actuation chain exists either not at all or should only be effective in case of emergency operation be. Basically, such an electromotive causes Opening aid that the operation of the relevant door handle is relatively easy, since only the return spring must be deflected and an operation the associated lock mechanism is unnecessary.

The invention is based on the object, a motor vehicle door lock the embodiment described above to create, in which the Ziehiehklinke already disengaged with the catch is before the pawl dug is, especially if an electromotive Caulking aid for the rotary latch with an electromotive Opening aid for the pawl combined becomes.

This object is achieved by the invention in a generic Motor vehicle door closure characterized in that on the rocker a Umsteuerglied is mounted with a slot and the Swingarm engages with a control pin in the slot or vice versa, that the Umsteuerglied and Zuziehklinke each a pin for a two pins acting on Leg spring has, that the Umsteuerglied has an approach that alternately with two from each other distanced attacks cooperates that the Cranking pawl has a boom, which with a stop at least at the attack surface of the catch releasing Zuziehklinke cooperates, and that the drive a crank mechanism which is on the rocker with the Zuziehklinke and the Umsteuerglied works and in the course of Totpunktüberfahrung a direction reversal of the spring action the leg spring causes the closing pawl. Vice versa means in the context of the invention that the rocker a Can have slot and the Umsteuerglied with a Control pin engages in this slot. - These measures The invention has the consequence that the direction of action of the closing pawl acting on leg spring is reversed after the closing process is completed is, so the catch reaches the main catch position Has. Only after the catch again the open position has assumed, the direction of action of the leg spring again reversed, in the direction of catch, therefore then the closing pawl is again in the direction of the catch spring-loaded. It can be used in the context of the invention the leg spring also use any other spring, whose direction of action is reversible and which the Reversing link connects with the closing pawl. In any case is ensured that the Ziehiehklinke due to the changing direction of action of the leg spring already is out of engagement with the catch before the pawl is dug. This is especially true for a Winkelweg of the crank mechanism between fully tightened catch and completely open rotary latch. This way will a blocking of the catch avoided. Independently of can the motor vehicle door lock according to the invention but also in a functional state, in which the Ziehiehken while tightening in engagement with the Rotary latch is. Then, however, the electromotive Opening aid - if available - prevented, for example in that of the control electronics a corresponding Operating signal for opening is not in the corresponding Motor energization is implemented. While crawling is rather only a manual emergency operation possible.

Other features essential to the invention are as follows listed. So on the one hand the rocker and the catch have the same axis of rotation, on the other hand the closing pawl and the Umsteuerglied the same pivot axis on the swingarm. This will be a compact and functional design realized that works smoothly. The Umsteuerglied can as a locking lever be formed with an arcuate slot whose Radius from the pivot axis of the Umsteuergliedes goes out, and which in the area of the slot end locking seats for the Control pin of the rocker has, so that the rocker in occupy well-defined positions in their functional positions, namely, if the control pin in the one or other latching seat of the elongated hole of the Umsteuergliedes sunken is. In that regard, well-defined Functional positions for the closing pawl on the swingarm reached. Preferably, the approach is located on the Umsteuerglied on the opposite side of the slot, so that for the reversal of the Umsteuergliedes or locking lever a particularly effective lever arm available stands. The stops for the approach to the Umsteuerglied are on the one hand of the lock housing, on the other hand of a bearing plate formed in the lock housing. The bearing plate is used for storage of various elements of the Lock mechanism and reinforced the lock housing.

Next, the invention provides that the closing pawl a Having nose, which cooperates with the attack surface of the catch, So especially functional against the attack surface the catch falls and releases it. Conveniently, the boom of the closing pawl carries the from the leg spring acted on pins. Further points the boom according to the invention a finger for engaging behind or overlap of the Zuziehklinke associated stop on. This stop is also on the bearing plate. - The leg spring can be as U-shaped Be formed spring whose U-leg, the pin on the Umsteuerglied and engage on the closing pawl or against issue. Incidentally, the leg spring with her U-base in the area of the pivot axes for the reversing member and the closing pawl arranged.

The of the electric motor drive or electric motor Driven crank drive is in the range with a crank arm the pivot axis for the Umsteuerglied and Zuziehklinke hinged to the swingarm.

Fig. 1

teilweise einen erfindungsgemäßen Kraftfahrzeugtürverschluß in schematischer Darstellung bei in Vorrast befindlicher Drehfalle,

Fig. 2

den Gegenstand nach Fig. 1 nach Betätigung der Schwinge durch den Kurbeltrieb entgegen Uhrzeigersinn derart, daß die Sperrklinke in die Hauptrast der Drehfalle einfallen kann,

Fig. 3

den Gegenstand nach Fig. 2 bei weiter betätigtem Kurbeltrieb nach Überfahren des oberen Totpunktes bis in Parkposition und gegen die Hauptrast der Drehfalle anliegender Sperrklinke,

Fig. 4

den Gegenstand nach Fig. 3 zu Beginn des Zuziehvorganges, nachdem der Kurbeltrieb seinen unteren Totpunkt überfahren hat,

Fig. 5

eine abgewandelte Ausführungsform des Gegenstandes nach Fig. 1, bei welcher sich die Sperrklinke in der Hauptrast der Drehfalle befindet und die Vorrast der Drehfalle identisch mit der Angriffsfläche für die Zuziehklinke ist,

Fig. 6

den Gegenstand nach Fig. 5 in Rückansicht.

In the following the invention will be explained in more detail with reference to a drawing showing only one embodiment. Show it:

Fig. 1

partially a motor vehicle door lock according to the invention in a schematic representation when the catch is in pre-locking,

Fig. 2

1 after actuation of the rocker by the crank mechanism counterclockwise such that the pawl can occur in the main catch of the catch,

Fig. 3

2 with further actuated crank drive after passing over the top dead center to parking position and against the main branch of the rotary latch applied pawl

Fig. 4

3 at the beginning of the closing process after the crank drive has crossed its bottom dead center,

Fig. 5

a modified embodiment of the article of Figure 1, in which the pawl is located in the main catch of the rotary latch and the pre-catch of the rotary latch is identical to the engagement surface for the Ziehiehklinke,

Fig. 6

the article of FIG. 5 in rear view.

In the figures is schematically and partially a motor vehicle door lock 1, the at least one rotary latch 2, a cooperating with the rotary latch 2 pawl 3 and a lock mechanism with an electromotive Has Zuziehhilfe 4 for the catch 2. The Crawl 4 has a pivotally mounted rocker fifth with a pivotally mounted on the rocker 5 Zuziehklinke 6 and an electric motor drive 7 for the Swingarm 5 with the closing pawl 6. The pawl 6 falls for transferring the catch 2 from a pre-locking position in a main locking position against an attack surface 8 at the 2 catch and transfers the catch 2 when turned on Drive 7 in the main position. On the Rocker 5 is also a reversing member 9 with a slot 10 stored. The rocker 5 engages with a control pin 11 in the slot 10 a. The Umsteuerglied 9 and the closing pawl 6 each have a pin 12, 13 for a the two pins 12, 13 acting on leg spring 14 on. In that regard, it is so to spring thigh Pins 12, 13. In this way, the Umsteuerglied 9 and the closing pawl 6 on the leg spring 14 interconnected. The reversing member 9 has a Approach 15, which alternately with two from each other distanced attacks 16, 17 cooperates, so in dependence from the pivoting movement of the reversing member. 9 works against the one 16 or against the other stop 17. The closing pawl 6 has a boom 18, the with a stop 19 at least at the attack surface. 8 the catch 2 releasing Zuziehklinke 6 cooperates. The electric motor drive 7 has a crank mechanism 20, on the rocker 5 with the closing pawl 6 and the Umsteuerglied 9 works and on the way the dead center over a direction reversal of the spring action of the leg spring 14 causes the closing pawl 6.

The rocker 5 and the catch 2 have the same Rotary axis 21. The closing pawl 6 and the reversing 9th have on the rocker 5 a same pivot axis 22. According to the embodiment, the reversing member 9 as Detent lever formed with an arcuate slot 10, whose radius from the pivot axis 22 of the reversing member. 9 emanates. The slot 10 has in the region of the slot ends 23, 24 Restsitze for it alternately incident Control pin 11 of the rocker 5. The approach 15 at the Umsteuerglied 9 is located on the slot 10th opposite side. The stops 16, 17 for the approach 15 are on the one hand from the lock housing 25, on the other formed by a bearing plate 26 in the lock housing 25. - The closing pawl 6 has a nose 27, which with the Engagement surface 8 cooperates on the rotary latch 2. The boom 18 of the closing pawl 6 carries the of the leg spring 14 acted upon pin 13. The boom 18 has a Finger 28 for grasping or overlapping the associated Stop 19, which is located on the bearing plate 26.

The leg spring 14 is according to the embodiment as U-shaped spring formed whose U-legs, the pins 12, 13 engage around the reversing member 9 and the closing pawl 6. - The crank drive 20 is connected to a crank arm 29th in the region of the pivot axis 22 for the reversing member 9 and the closing pawl 6 hinged to the rocker 5.

In Figs. 1 to 4, the sequence of a closing process shown.

In Fig. 1, the closing pawl 6, at this time and in this position in the direction of catch 2 of the Leg spring 14 is loaded, in the corresponding attack surface 8 has fallen on the catch 2. The catch 2 is in the pre-locked position. The rocker 5 with the reversing member 9 and the closing pawl 6 is through the crank mechanism 20 of the electromotive drive 7, the only hinted is driven counterclockwise until the overtravel shown in Fig. 2 is achieved. In this Situation, the pawl 3 in the main catch 30 of Rotary latch 2 occur while the crank mechanism 20 his has reached top dead center OT. Just before the top dead center OT has been reached, proposes the approach 15 of the Umsteuergliedes 9 on the housing-side stop 16 at. There the bearing point or pivot axis 22 of the Umsteuergliedes 9th in the drawing moves even further up, the Reversing member 9 pivoted clockwise. A comparison Figs. 1 and 2 makes it clear that the arcuate Slot 10 of the Umsteuergliedes 9 the control pin 11 the rocker 5 previously with the upper snap-seat-like slot end 23 and subsequently with the lower snap-fits Langlochende 24. Since the Zuziehklinke 6 in this Situation still against the attack surface 8 of the catch 2 press, exist between the closing pawl 6 and the attack surface 8 friction forces that are greater than the spring force the leg spring 14 and the respective spring leg are when the leg spring 14 - as shown in Fig. 2 - is spread. After overcoming the top dead center OT of the crank mechanism 20, the closing pawl 6 moves away from the catch 2 down and the friction between Zuziehklinke 6 and attack surface 8 are increasing Dimensions smaller. Finally, the closing pawl 6 through the prestressed leg spring 14 or the respective spring leg pivoted away from the catch 2, as in Fig. 3 is shown. The in their opening direction spring-loaded rotary latch 2 comes with her Main rest 30 to rest on the pawl 3. The electromotive Drive 7 or crank drive 20 takes according to FIG. 3 a parking position P on until the catch 2 the next Time is opened. This is not shown by Position sensors detected. This parking position P of the crank mechanism 20 may be between those shown in FIGS. 3 and 4 Positions are. It is advantageous to the parking position P to choose according to Fig. 3, since then no more engine noise are heard after the vehicle door completely closed has been.

According to Fig. 4, the electric motor drive 7 is energized again Service. The signal comes from not shown Position sensors that detect the vehicle door is open. In this case, the rocker 5 in the Drawing further pulled down. Before the crank drive 20 reaches its bottom dead center UT, comes the approach 15th on Umsteuerglied 9 to rest against the stop 17 at the Bearing plate 26. When bottom dead center UT is exceeded pivots the reversing member 9 counterclockwise. The upper slot end 23 of the arcuate slot 10 takes again the control pin 11 of the rocker 5. The crank mechanism 20 still exceeds an angle of, for example 45 ° before stopping. The boom 18 of the closing pawl 6 and the finger 28 engages behind the boom 18 or overlaps the associated stop 19 on the bearing plate 26 such that the closing pawl 6 in this situation can not be pivoted in the direction of catch 2. However, since the Umsteuerglied 9 already forcibly in the direction Rotary latch 2 has been pivoted, are the two Spring leg of the leg spring 14 has been spread again. The fully open position of the rotary latch 2 is in Fig. 4 has not been shown, but already the beginning of the closing process. This begins when the pawl 3 just in the Vorrast 31 has fallen, which in turn detected by position sensors, not shown, and of the control electronics in a corresponding signal for the electromotive drive 7 is implemented. With the upward movement the swingarm 5 becomes the blockage or friction between the boom 18 and its finger 28 and the stop 19 on the bearing plate 26 - thus between Zuziehklinke 6 and bearing plate 26 - repealed. The preloaded Leg spring 14 and the corresponding spring leg brings the closing pawl 6 and her nose 27 to the plant against the attack surface 8 on the catch 2. The other Course of the closing is shown in Fig. 1.

In the modified embodiment of FIGS. 5 and 6 is an electromotive Zuziehhilfe realized that also one about the pivot point of the rotary latch 2 rotating Has rocker 5, on which the closing pawl 6 rotatable is stored. There, the spring force is always on the catch 2 directed. In addition to the catch 2, the pawl 3 and the closing pawl 6 is only one operating lever 32nd for the closing pawl 6 to recognize while the rocker 5 only indicated by a line. In this case the pre-rest 31 of the catch is identical to the Attack area 8 for the closing pawl 6. This means that in this embodiment, after slamming the Vehicle door the pawl 3 already leave the pre-rest 31 has and the catch 2 between the main branch 30th and the pre-rest 31 is present. Through a position sensor the collapse of the closing pawl 6 is detected in the pre-rest 31 and the closing process started. He is then completed when the pawl 3 in the main branch 30th is as shown in Figs. 5 and 6. Besides that is there the drive continued or moved back, so that the closing pawl 6 in its starting position for the Zuziehvorgang is located.

The motor vehicle door lock according to the invention preferably has also an electromotive opening aid for the Pawl on. However, this opening aid is for reasons the simplification not shown.

Claims (13)

1. Motor vehicle door lock with at least one rotary catch, a locking pawl, and a lock mechanism with a tightening aid for the rotary catch, whereby the tightening aid has a rocker with a pivotably supported tightening pawl and an electric-motorized drive for the rocker with the tightening pawl, which, for transporting of the rotary catch from a prelocking position or an intermediate position into a primary locking position, engages against a working surface on the rotary catch and with a switched-on drive, transports the rotary catch into the primary locking position, characterized in that on the rocker (5), a reversing member (9) with a slotted hole is supported and the rocker (5) engages or reverses with a control pin (11) in the slotted hole (10), that the reversing member (9) and the tightening pawl (6) each have a pin (12, 13) for a leg spring (14) impinging the two pins, that the reversing member (9) has a shoulder (15), which cooperates alternatingly with two spaced-apart stops (16, 17), that the tightening pawl (6) has an arm (18), which cooperates with a stop (19) at least upon the tightening pawl releasing the working surface of the rotary catch (2), and that the drive (7) has a crank mechanism (20), which works on the rocker (5) with the tightening pawl (6) and the reversing member (9) and affects a reversal of direction of the spring action of the leg spring (14) on the tightening pawl (6) in the course of crossing over the dead center.
2. Motor vehicle door lock according to claim 1, characterized in that the rocker (5) and the rotary catch (2) have the same axis of rotation (21).
3. Motor vehicle door lock according to claim 1 or 2, characterized in that the tightening pawl (6) and the reversing member (9) have the same pivot axis (2) on the rocker (5).
4. Motor vehicle door lock according to one of claims 1 through 3, characterized in that the reversing member (9) is formed as a locking lever with a curved slotted hole (10), whose radius originates from the pivot axis (22) of the reversing member (9), and which has locking seats for the control pin (11) of the rocker (5) in the area of the slotted holes (23, 24).
5. Motor vehicle door lock according to one of claims 1 through 3, characterized in that the rocker (5) has a curved slotted hole, which has locking seats for a control pin on the reversing member (9) in the area of the slotted holes.
6. Motor vehicle door lock according to one of claims 1 through 5, characterized in that the shoulder (15) is located on the reversing member (9) on the side opposite the slotted hole (10).
7. Motor vehicle door lock according to one of claims through 6, characterized in that the stops (16, 17) for the shoulder, on the one hand, are formed by lock housings, and on the other hand, by a bearing plate (26) in the lock housings (25).
8. Motor vehicle door lock according to one of claims 1 through 7, characterized in that the tightening pawl (6) has a nose (27), which cooperates with the working surface (8) on the rotary catch (2).
9. Motor vehicle door lock according to one of claims 1 through 8, characterized in that the working surface on the rotary catch (20) is formed by its prelock (31) or a separate working surface (8) thereon.
10. Motor vehicle door lock according to one of claims 1 through 9, characterized in that the arm (18) of the tightening pawl (6) supports the pins (13) impinged by the leg spring (14).
11. Motor vehicle door lock according to one of claims 1 through 10, characterized in that the arm (18) has a finger (28) for engaging behind or engaging over the associated stop (19) and this stop (19) is located on the bearing plate (26).
12. Motor vehicle door lock according to one of claims 1 through 11, characterized in that the leg spring (14) is formed as a U-shaped spring, whose U-leg engages about the pins (12, 13) on the reversing member (9) and on the tightening pawl (6).
13. Motor vehicle door lock according to one of claims 1 through 12, characterized in that the crank mechanism (20) is hinged with a crank arm (29) in the area of the pivot axis (22) for the reversing member (9) and the tightening pawl (6) is hinged to the rocker (5).

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