EP1081321A2 - Motor vehicle door lock - Google Patents

Abstract

The device has at least one rotary catch (2), a blocking pawl and a lock mechanism with a closure aid for the rotary catch, whereby the closure aid has a vane (5) with a pivotable pawl, an electric motor drive and a direction changing element (9) with an elongated hole (10) engaged by a control journal on the vane and a protrusion interacting with two separate stops (16,17). The drive (7) has a crank mechanism (20) acting on the vane with the closure pawl (6) and the direction changing element to change the direction of a spring (14) action on the closure pawl when passing through a dead point.

Description

The invention relates to a motor vehicle door lock, with at least one catch, one pawl and one Lock mechanism with a closing aid for the rotary latch, whereby the closing aid a swing arm with a pivoted Closing pawl and with an electric motor drive for the swing arm with the closing pawl, which for transferring the rotary latch from a pre-locking position or an intermediate position in a main resting position against an attack surface on the rotary latch and with the drive switched on, the rotary latch into the Main rest position transferred.

Such a motor vehicle door lock is known in which the closing aid a drive motor and a power train led from the drive motor to the rotary latch includes. In this power train is one 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 disengaged at any time by operating the outer door handle is (see DE 38 36 771). In addition to such an electromotive A closing aid is also known as an electric motor Opening aid for the pawl (see DE 195 30 726). In In this case, the electric motor is based on an opening signal energized, which for example on the outside door handle is produced. A manual external chain of operations exists either not at all or should only be effective in the event of an emergency actuation his. Basically, such an electromotive Opening aid that the operation of the door handle in question is relatively light, since only its return spring must be deflected and an activity the associated lock mechanism is unnecessary.

The invention has for its object a motor vehicle door lock the embodiment described above to create, in which the closing pawl is already disengaged with the catch before the pawl is lifted is, especially when an electromotive Closing aid for the catch with an electric motor Combined opening aid for the pawl becomes.

The invention solves this problem with a generic one Motor vehicle door lock in that on the swing arm Reversing member is mounted with an elongated hole and the Swing arm engages in the elongated hole with a control pin or vice versa, that the reversing link and the closing pawl one pin each for one acting on the two pins Leg spring has that the reversing member has an approach that alternates with two from each other distant attacks interacts that the Closing pawl has a boom with a stop at least with the attack surface of the rotary latch releasing Pull latch interacts, and that the drive has a crank mechanism on the rocker with the Locking pawl and the changeover link works and in the course of Overcoming dead center a reversal of the spring action the leg spring on the closing pawl causes. Vice versa means within the scope of the invention that the rocker Can have elongated hole and the reversing element with a Control pin engages in this slot. - These measures the consequence of the invention that the direction of action the leg spring acting on the closing pawl reversed after the closing process is completed is, so the catch reaches the main click position Has. Only after the rotary latch returns to the open position has assumed the direction of action of the leg spring again the other way round, in the direction of the rotary latch, consequently then the closing pawl is again in the direction of the catch spring loaded. It can take place within the scope of the invention the leg spring can also use any other spring, whose direction of action is reversible and which Reversing link connects to the closing pawl. In any case it is ensured that the closing latch due to the changing direction of action of the leg spring already is disengaged from the catch before the pawl is excavated. This applies in particular to an angular path of the crank mechanism between the fully closed rotary latch and fully opened rotary latch. That way blocking of the rotary latch avoided. Independently of can the motor vehicle door lock according to the invention but are also in a functional state in which the Locking pawl engages with the Catch is. Then, however, the electromotive Opening aid - if available - prevented, for example in that a corresponding from the control electronics Operating signal for opening is not in the corresponding Motor power supply is implemented. While closing rather, only manual emergency operation is possible.

Further features essential to the invention are as follows listed. So on the one hand the swing arm and the rotary latch have the same axis of rotation, on the other hand the closing pawl and the reversing link have the same pivot axis have on the swingarm. This makes it compact and functional design, which works smoothly. The reversing element can act as a locking lever be formed with an arcuate slot, the Radius starts from the swivel axis of the reversing element, and which in the area of the slotted ends rest seats for the Control pin of the rocker arm, so that the rocker arm in assumes well-defined positions in their functional positions, if the control pin in one or other click seat of the elongated hole of the reversing element has occurred is. In this respect, well-defined ones are also made Functional positions for the closing latch on the swing arm reached. The approach is preferably located on the reversing element on the side opposite the slot, so that for the reversal of the reversing member or locking lever a particularly effective lever arm is available stands. The stops for the approach to the changeover link are on the one hand from the lock housing, on the other hand from a bearing plate is formed in the lock housing. The bearing plate is used to store various elements of the Lock mechanism and reinforces the lock housing.

The invention further provides that the closing pawl is one Has a nose that interacts with the surface of the catch of the rotary catch, so especially functional against the attack surface the catch catches and releases it. Advantageously, the extension of the closing pawl carries the pin loaded by the leg spring. Furthermore points the boom according to the invention a finger to reach behind or overlap the stop assigned to the closing pawl on. This stop is also on the bearing plate. - The leg spring can be U-shaped Be formed spring, the U-legs of the pin on the Grasp reversing element and on the closing pawl or against it issue. For the rest, the leg spring is with hers U-base in the area of the swivel axes for the reversing element and arranged the closing pawl.

That of the electric motor drive or electric motor powered crank drive is with a crank arm in the area the pivot axis for the reversing element and the closing pawl hinged to the swing arm.

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 Kurbeitrieb 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 Kurbeitrieb 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 exemplary embodiment. Show it:

Fig. 1

partially a motor vehicle door lock according to the invention in a schematic representation with the rotary latch in the forward position,

Fig. 2

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

Fig. 3

2 with crank drive still operated after passing top dead center into the parking position and against the main catch of the rotary latch, pawl,

Fig. 4

3 at the beginning of the closing process after the spa operator has passed its bottom dead center,

Fig. 5

1, in which the pawl is in the main catch of the catch and the catch of the catch is identical to the contact surface for the catch,

Fig. 6

5 in rear view.

In the figures, a motor vehicle door lock is shown schematically and partially 1 shown, the at least one catch 2, a pawl cooperating with the catch 2 3 and a lock mechanism with an electromotive Closing aid 4 for the catch 2 has. The Closing aid 4 has a pivotable rocker arm 5 with a closing pawl pivotally mounted on the rocker 5 6 and an electric motor drive 7 for the Swing 5 with the closing pawl 6. The closing pawl 6 falls to transfer the catch 2 from a pre-locking position in a main resting position against an attack surface 8 on the Catch 2 and transfers the catch 2 when switched on Drive 7 in the main rest position. On the Swing arm 5 is also a reversing element 9 with an elongated hole 10 stored. The rocker 5 engages with a control pin 11 into the elongated hole 10. The reversing element 9 and the closing pawl 6 each have a pin 12, 13 for a leg spring acting on the two pins 12, 13 14 on. In this respect, it is a matter of spring leg loads Pins 12, 13. In this way, the reversing element 9 and the closing pawl 6 via the leg spring 14 connected to each other. The reversing element 9 has one Approach 15 on, alternating with two from each other distant stops 16, 17 cooperates, that is, depending from the pivoting movement of the reversing element 9 works against one 16 or against the other stop 17. The closing pawl 6 has a boom 18 which with a stop 19 at least in the face 8 the catch 2 releasing pull latch 6 cooperates. The electric motor drive 7 has a crank drive 20, which on the rocker 5 with the closing pawl 6 and the Reversing element 9 works and on the way to the dead center a reversal of the spring action of the leg spring 14 causes on the closing pawl 6.

The rocker 5 and the rotary latch 2 have the same Rotation axis 21. The closing pawl 6 and the reversing member 9 have the same pivot axis 22 on the rocker 5. According to the embodiment, the reversing element 9 is as Locking lever formed with an arcuate slot 10, its radius from the pivot axis 22 of the reversing element 9 going out. The elongated hole 10 points in the region of the elongated hole ends 23, 24 resting seats for the alternately falling Control pin 11 of the rocker 5. The approach 15 to the Reversing element 9 is located on the slot 10 opposite side. The stops 16, 17 for the approach 15 are on the one hand from the lock housing 25, on the other hand formed by a bearing plate 26 in the lock housing 25. - The closing pawl 6 has a nose 27 which with the Attack surface 8 cooperates with the catch 2. The boom 18 the closing pawl 6 carries that of the leg spring 14 loaded pin 13. The boom 18 has a Finger 28 for reaching behind or reaching over 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, the U-legs of the pins 12, 13 on the reversing element 9 and on the closing pawl 6. - The crank drive 20 is with a crank arm 29 in the region of the pivot axis 22 for the reversing element 9 and the closing pawl 6 is articulated on the rocker 5.

1 to 4 is the sequence of a closing process shown.

In Fig. 1, the closing pawl 6 is at this time and in this position towards the rotary latch 2 from the Leg spring 14 is loaded into the corresponding contact surface 8 collapsed on the catch 2. The catch 2 is in the pre-locked position. The swing arm 5 with the reversing member 9 and the closing pawl 6 is through the crank mechanism 20 of the electric motor drive 7, the is only indicated, driven counterclockwise until the overstroke shown in FIG. 2 is reached. In this Situation, the pawl 3 in the main catch 30 of the Catch 2 occur while the spa drive 20 its has reached top dead center OT. Just before top dead center Approach 15 of the reversing element has been reached 9 on the housing-side stop 16. There the bearing point or pivot axis 22 of the reversing element 9 in the drawing moving upwards, it will Reversing element 9 pivoted clockwise. A comparison 1 and 2 makes it clear that the arcuate Elongated hole 10 of the reversing member 9 on the control pin 11 the rocker 5 previously with the upper resting seat-like slot end 23 embraces and subsequently with the lower rest seat-like Slot end 24. Because the closing pawl 6 in this Situation still against the surface 8 of the catch 2 presses, exist between the closing pawl 6 and the attack surface 8 friction forces greater than the spring force the leg spring 14 or the relevant spring leg are when the leg spring 14 - as shown in Fig. 2 - is spread. After overcoming top dead center OT the crank mechanism 20 removes the closing pawl 6 from the catch 2 down and the frictional forces between the closing pawl 6 and 8 attack surface are increasing Dimensions smaller. Finally, the closing pawl 6 by the Prestressed leg spring 14 or the spring leg in question pivoted away from the catch 2, as in Fig. 3 is shown. The in their opening direction spring-loaded catch 2 comes with it Main catch 30 for contact with the pawl 3. The electromotive Drive 7 or crank drive 20 takes according to FIG. 3 a parking position P until the catch 2 the next Times is opened. This is not shown by Position sensors detected. This parking position P of the crank mechanism 20 can be between those shown in FIGS. 3 and 4 Positions. It is advantageous to park position P 3 to choose, since then no more engine noise are heard after the vehicle door is fully closed has been.

4, the electric motor drive 7 is energized again been. The signal comes from not shown Position sensors that detect the vehicle door is open. In this case, the rocker 5 in the Drawing pulled further down. Before the spa operation 20 reaches its bottom dead center UT, approach 15 on the reversing element 9 for abutment against the stop 17 on the Bearing plate 26. When bottom dead center 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 it is stopped. The extension 18 of the closing ratchet 6 or 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 cannot be pivoted in the direction of the catch 2. However, since the reversing element 9 is already forcibly in the direction Catch 2 has been pivoted, are the two Spring legs of the leg spring 14 have been spread again. The fully open position of the rotary latch 2 is in Fig. 4 has not been shown, but already the beginning the closing process. This begins when the pawl 3 has just fallen into the latch 31, which in turn recognized by position sensors, not shown, and by the control electronics into a corresponding signal for the electromotive drive 7 is implemented. With the upward movement the rocker 5 becomes the blockage or friction between the boom 18 or his finger 28 and the stop 19 on the bearing plate 26 - consequently between closing pawl 6 and bearing plate 26 - canceled. The biased Leg spring 14 or the corresponding spring leg brings the closing pawl 6 or its nose 27 to the system against the attack surface 8 on the rotary latch 2. The other The course of the closing is shown in Fig. 1.

In the modified embodiment according to FIGS. 5 and 6 is an electromotive closing aid realized also a rotating around the pivot point of the rotary latch 2 Swing arm 5 has, on which the closing pawl 6 rotatable is stored. There the spring force is always on the rotary latch 2 directed. In addition to the catch 2, the pawl 3 and the closing pawl 6 is only an operating lever 32 for the closing pawl 6, while the rocker arm 5 is only indicated by a line. In this case the catch 31 of the rotary latch is identical to that Attack surface 8 for the closing latch 6. This means that in this embodiment after striking the Vehicle door, the pawl 3 already leave the latch 31 and the catch 2 between the main catch 30 and the latch 31 is present. Through a position sensor the engagement of the closing pawl 6 in the preliminary catch 31 is recognized and the closing process started. It is then completed if the pawl 3 is in the main catch 30 located as shown in Figs. 5 and 6. Besides, is there the drive continued or retracted so that the closing pawl 6 in its starting position for the Closing process is located.

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

Claims (13)

Motor vehicle door lock with at least one rotary latch, a pawl and a lock mechanism with a closing aid for the rotary latch, the closing aid having a rocker arm with a pivotably mounted closing latch and an electric motor drive for the rocker with the closing latch, which is used to transfer the rotary latch from a pre-locking position or one Intermediate position falls into a main detent position against an engagement surface on the rotary latch and transfers the rotary latch to the main detent position when the drive is switched on, characterized in that a reversing member (9) with an elongated hole (10) is mounted on the rocker (5) and the rocker (5 ) engages with a control pin (11) in the elongated hole (10) or vice versa, that the reversing member (9) and the closing pawl (6) each have a pin (12, 13) for a leg spring (14) acting on the two pins, that the reversing element (9) has an extension (15) which alternately interacts with two spaced-apart stops (16, 17) that the closing pawl (6) has a cantilever (18) which interacts with a stop (19) at least in the closing pawl (6) releasing the catch surface of the rotary latch (2), and that the drive (7) has a crank mechanism (20), which works on the rocker (5) with the closing pawl (6) and the reversing element (9) and, in the course of the dead center, reverses the direction of the spring action of the leg spring (14) on the closing pawl ( 6) causes. Motor vehicle door lock according to claim 1, characterized in that the rocker (5) and the rotary latch (2) have the same axis of rotation (21). Motor vehicle door lock according to claim 1 or 2, characterized characterized in that the closing pawl (6) and the reversing member (9) the same pivot axis (22) on the Have rocker (5). Motor vehicle door lock according to one of claims 1 to 3, characterized in that the reversing element (9) as Locking lever with an arcuate slot (10) formed is, the radius of the pivot axis (22) of the reversing member (9) goes out, and which in the area of the slot ends (23, 24) detent seats for the control pin (11) of the Swing arm (5). Motor vehicle door lock according to one of claims 1 to 3, characterized in that the rocker (5) is an arcuate Has elongated hole, which in the area of the elongated hole ends Detent seats for a control pin on the changeover link (9) has. Motor vehicle door lock according to one of claims 1 to 5, characterized in that the approach (15) on the Reversing element (9) on the slot (10) opposite Side. Motor vehicle door lock according to one of claims 1 to 6, characterized in that the stops (16, 17) for the approach (15) on the one hand from the lock housing (25), on the other from a bearing plate (26) in the lock housing (25) are formed. Motor vehicle door lock according to one of claims 1 to 7, characterized in that the closing pawl (6) a Has nose (27) with the contact surface (8) on the Catch (2) interacts. Motor vehicle door lock according to one of claims 1 to 8, characterized in that the contact surface on the Rotary latch (2) from their preliminary catch (31) or one of them separate attack surface (8) is formed. Motor vehicle door lock according to one of claims 1 to 9, characterized in that the boom (18) of the Closing pawl (6) acted upon by the leg spring (14) Pin (13) carries. Motor vehicle door lock according to one of claims 1 to 10, characterized in that the boom (18) a Finger (28) for reaching behind or reaching over the assigned one Has stop (19) and this stop (19) on the bearing plate (26). Motor vehicle door lock according to one of claims 1 to 11, characterized in that the leg spring (14) is designed as a U-shaped spring, the U-leg of the Pin (12, 13) on the reversing member (9) and on the closing pawl (6) reach around. Motor vehicle door lock according to one of claims 1 to 12, characterized in that the spa drive (20) with a crank arm (29) in the region of the pivot axis (22) for the reversing element (9) and the closing pawl (6) on the Swing arm (5) is articulated.

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