EP1155208B1 - Door lock, especially for motor vehicles - Google Patents

Abstract

A rotary latch (11) of a door lock is retained in a detent position by a spring-mounted retainer (20). A motor-driven working member (47) is provided for lifting said retainer (20). An energy-storing device (30) subjects a storing member (22) to a force and hereby serves to lift the retainer (20) out of its detent position in the rotary latch (11). To this end, the storing member (22) has a control surface against which the working member (47) travels in a first motor phase in order to load the energy-storing device (30). A counter-control surface (29) against which the working member (47) travels when lifting the retainer (20) in a staggered second motor phase is also provided. The aim of the invention is to provide a reliable door lock which will also function in the event of an accident. To this end, both the control surface (23) and the counter-control surface (29) are located on the storing member (22). The additional force required for lifting the retainer (20) acts on said retainer indirectly through the storing member (22). As a result, the quantities of energy produced one after the other in the two motor drive phases can be transmitted spontaneously from the shoulder (32) of the storing member (22) to the counter-shoulder (33) of the retainer (20).

Description

The invention relates to a door lock, which in the preamble of claim 1 specified type. The rotary latch takes in its one rotary end position, namely its Rest position, a closing member, which engages there in a main rest and the Latch locked against its spring load. To close the catch in its open position transfer, the pawl is unlocked. Use to unlock the latch a motor-driven working member. The motor is activated if - in the case of user access authorization - e.g. one to the door lock belonging handle is actuated directly or indirectly.

In the known door lock of this type (DE 197 25 416 Cl) a load Energy storage the arm of a storage member, which is attached to the motor driven working member and thus defines the state of charge of the energy accumulator. This storage member has a shoulder, which is used to lift the pawl a counter shoulder on one arm of the jack pushes to the jack by unloading the lift mechanism from its latching position in the catch. This applies to both in the normal case as well as in a special case, if that with a door lock equipped vehicle has experienced a crash. The storage element has a control surface on which the motor-driven working member is supported.

The pawl has a long arm, in the end of which a counter control surface is provided against which the working member when lifting the pawl from the Rotary trap in a second, which is staggered in time compared to the first motor drive phase Phase moves.

This door lock has proven itself, because in special cases the first and second motor drive phase successively applied amounts of energy of the motor transferred from shoulder to counter shoulder at the same time, yes there are production and operational disadvantages. The one on the jack provided arm must have a large length because of the counter control surface, which causes the pawl's center of gravity in relation to its pivot point in a large Distance comes to lie. This requires complex manufacturing processes. Safety regulations require that the door lock be high in the event of a crash Must withstand inertial forces, e.g. Inertial forces 30 times Achieve gravitational acceleration. To automatically open the door lock avoid, the return springs should be strongly trained in the known lock his. As a result, the operating forces required to lift the Jack out of the catch was high. The opening of the well-known door lock was stiff.

The invention has for its object a door lock in the preamble of Claim 1 to develop the type mentioned the disadvantages avoids. This is according to the invention by the characterizing part of claim 1 specified measures achieved, which have the following special meaning.

In the invention, both the control surface and the counter control surface are on Storage lever provided. Therefore, the arm on the pawl, which is when unloading the lift mechanism should absorb the released lifting force for the pawl, be very short. The center of gravity of the jack is thus very close to hers Pivot point. The additional required after a crash of the vehicle Motor lifting energy for the pawl is also transferred from the working member to the Transfer memory element. The one after the other in the two motor drive phases Amounts of energy applied after a crash over the same places transferred, namely always from the shoulder of the storage member to the counter shoulder the jack. These points can also be very close to the pivot point of the jack. The at the Latch-acting return spring can be designed weaker, what a enables easy opening.

Fig. 1

die Draufsicht auf die wesentlichen Bauteile des erfindungsgemäßen Türschlosses, wenn die Klinke in der Drehfalle eingerastet ist und die Drehfalle in ihrer Rastlage verriegelt,

Fig. 2 und 3

das gleiche Türschloss in zwei weiteren Stellungen seiner Bauteile, die sich im Normalfall in einer Offenlage (Fig. 2) des Schlosses und (Fig. 3) wieder bei einer Rückstellung in die Rastlage ergeben,

Fig. 4 und 5

zeigt die Verhältnisse bei einem Sonderfall, wo das Ausheben der Klinke erst durch eine gemeinsame Anstrengung sowohl eines Kraftspeichers als auch eines Motors ermöglicht wird.

Further measures and advantages of the invention result from the subclaims, the following description and the drawings. In the drawing, the invention is shown in one embodiment. Show it:

Fig. 1

the top view of the essential components of the door lock according to the invention when the latch is engaged in the rotary latch and the rotary latch locks in its latched position,

2 and 3

the same door lock in two further positions of its components, which normally result in an open position (FIG. 2) of the lock and (FIG. 3) again when reset to the locking position,

4 and 5

shows the situation in a special case, where the lifting of the pawl is only possible through a joint effort of both an energy accumulator and a motor.

Fig. 1 shows the initial situation where a rotary latch 11 of a locking arm 21st a pawl 20 is locked in a rest position. The pawl 20 is in the sense of Force arrow 28 loaded by a return spring 24. This is shown in Case of the locking arm 21 held in a main catch 17 of the rotary latch 11. The catch 11 can also engage in a corresponding manner with the pawl 20 have coming pre-catch 16. The catch 11 has a receptacle 14 for a locking part 10 formed here only as a bolt. The pawl 20 has one fixed pivot point 15, while the rotary latch 11 is seated on a journal 13. The Rotary catch 11 is in turn in the direction of arrow 12 from a return spring 18 loaded, which endeavors, the catch 11 into one shown in Fig. 2 To convince disclosure.

The door lock further comprises a link 22, which in the direction of arrow 25 of an energy accumulator 30 is loaded and should therefore be called a "storage element". This storage element 22 could be a slide. In the present case, there is Storage member from a lever 22 which is on the same pivot 15 as that Jack 20 is pivotally mounted. This link 22 should always follow "Storage levers" are called, but it goes without saying that an im other sense movable member could be acted upon by the energy accumulator 30. The storage lever 22 strives according to the spring force 25 in one of FIG. 2 or 3 visible swivel position. In the starting position of Fig. 1, the storage lever 22 is prevented from doing so because it is there with one provided control surface 23 on a working member 47, which e.g. of an electric motor 40 is driven.

The working member is designed as a cam, which has a special contour profile 45 has and is arranged at a distance from an axis of rotation 46 about which it passes through a motor 40 and a gear can be rotated in the direction of arrow 27. This cam 47 holds the storage lever 22 in the starting position of FIG. 1 in a rotational position ensuring the full state of charge of the energy store 30. The Auxiliary line 22.1 of Fig. 1 indicates the resulting rotational position, the results from the effective profile point 31 on the cam contour 45. This Profile point 31 should be the maximum radial distance from cam rotation axis 46 have. In the rest position of Fig. 1, the door is closed. To open it must actuated an outer and / or inner handle, not shown, or one Signal receiving point can be triggered by remote control. That can mechanically or electrically in the present case. Handle this or Signal receiving points are connected to control means, which are two sensors and include control logic. One sensor attacks the rotary latch, e.g. at the with 51 marked position, while the other sensor the angular position of the The rotary latch 11 is monitored and, for example, at the point marked 22 in FIG. 1 is positioned. When the motor 40 is energized, this leads to one in the sense of the arrow 27 of FIG. 1 marked rotary movement of the control cam 47. The storage lever 22 is increasingly released because of the cam along the Control surface 23 slides and with different other profile points of his Outline profile 45 is supportive. The cam rotation axis 46 comes radially closer standing profile points of the outline profile for support. The energy accumulator 30 is increasingly discharged.

The storage lever 22 has a shoulder 32 which has a counter shoulder 33 is assigned to an actuating arm 26 belonging to the pawl 20. The when unloading the Force accumulator 30 released spring force 25 also presses the storage lever 22 his shoulder 32 against the counter shoulder 33 on the pawl 20 and lifts it the main catch 17 of the rotary latch 11. Then the catch 11 under the Effect of the restoring force 12 acting on them up to one from FIG. 2 apparent open position to be released. The catch 11 has emerged from there dash-dot indicated rest position in the drawn open position pivoted the angle 19. The locking part is from the receptacle 14 of the catch 11 extended and in its drawn release position 10 'of FIG. 2nd arrives. The mentioned counter shoulder 33 on the pawl 20 can be used be reinforced from harder material.

In addition to the control surface 23, the storage lever 22 also has a counter control surface 29. This comes about because the control lever 22 in its end region 34 is provided with an opening 35 which is divided into two legs 36, 37 creates. Although it is not necessary, here are the two leg ends connected by a web 38, whereby the cutout 35 here Looks like an "eyelet". The eyelet 35 has an elongated, kidney-shaped profile. The edges of the eyelet 35 directed towards each other in the direction of rotation 27 form the edges the control or counter-control surfaces 23, 29 interacting with the cam 47.

Fig. 2 shows the normal case where the rotation 27 of the control cam 47 already ends before the control cam has reached the counter control surface 29. Then stops the motor rotates in the direction of rotation 27. In Fig. 2 the excavated is supported Locking arm 21 of the pawl 20 on a designated contact surface of the catch 11 from; the pawl 20 is held in a standby position. The cam 47 comes with a second profile point 39 in another area of the control surface 23 for support. The auxiliary line 22.2 indicates the same mark as in Fig. 1 shows the open position of the trap 11. The cam 47 has in this normal case 1 moved in the direction of rotation 27 by an angular range 41. This Movement has only come about by unloading the energy accumulator 30.

In the event of a crash, however, or in the event of other malfunctions, it may be the same as that from FIG. 4 recognizable conditions come. The pawl locking arm 21 is so tight in the Main catch 17 of the rotary latch 11 that the spring force exerted by the energy accumulator 30 25 is not sufficient to release the pawl 20. That is from the mentioned Sensors found at 51, 52. The motor 40 then runs over that shown in FIG. 2 Rotation position further in the direction of arrow 27 and first comes out in one Fig. 4 apparent intermediate position, where the cam 47 with a third profile point 42 just touches the counter control surface 29. With this touch it is Profile point of the axis of rotation 46 very close. The cam 47 has the control surface 23 leave and take the intermediate rotary position indicated by the auxiliary line 22.4 on. 4, the cam 47 has the one shown in FIG. 2 and 41 designated angle is not yet completely completed, but only the one with 43 go through marked partial angles. Thereby, the im Energy storage 80 charged energy, but, as I said, in the event of a crash it is sufficient for Do not lift out the pawl 20.

The motor 40 continues to run in the direction of rotation 27, which is why the cam 47 on it further path with changing profile points in the eyelet 35 at changing Areas of the counter control surface 29 slides along. Finally, the one in FIG Obtained position reached where the control cam 27 through the auxiliary line 22.5 marked end position reached. On the way between Fig. 4 and 5 there is an angular range 44 where the cam 47 is directly from the motor 40 was driven. With this residual rotation, the driving force of the motor 20 comes still add the spring force of the energy accumulator 30. That is enough to lock the latch 21, as shown in FIG. 5, to be released from the main catch 17 of the rotary latch 11. This could then, as has already been explained with reference to FIG. 2, under the effect of their Restoring force 12 reach their turning stop. The closing part is in his Release position 10 '.

After lifting the pawl 20 in the event of a malfunction according to FIG. 5 or in the normal case 2, the cam 47 could in the interior of the eyelet 35 in the same direction 27 continue to the initial situation of Fig. 1, but in this Embodiment, the engine 40 via the control logic mentioned stopped what again by means of the sensors, e.g. at 51, 52. Then changes the motor 40 has its direction of rotation in the direction of the counter-rotation arrow 48 counter-current the motor 40. The cam 47 bumps during this reverse rotation 48 to the control surface 23 and moves the storage lever 22 back into the starting position shown in FIG. 1 back.

With this return 48, the cam 47 comes into that shown in FIG. 3 Intermediate position, which is marked there by the corresponding auxiliary line 22.3, a fourth profile point 49 comes from the cam outline for the first time with the Control surface 23 in contact. During the further reverse rotation 48 Storage lever 22 moves against the spring force 25, whereby the energy accumulator 30 is recharged. The energy accumulator 30 is charged in the manner shown in FIG. 3 angular range marked with 50. So loading at 50 is done in one different motor drive phase than the unloading of the energy store 30. The latter is in Normally illustrated by the angular range 41 in FIG. 2. The one in both Motor drive phases at 41 on the one hand and at 50 on the other hand in succession In the event of a fault, the applied forces are applied via the same points of contact, namely the shoulder 32 and the counter shoulder 33 between the two components 20, 22 transmitted. The storage lever 22 serves as an opening aid for lifting the Jack both in the normal case and in the event of a fault.

As already mentioned, there is a one-piece design of the invention Control surface 23 with the counter control surface 29 before; both sit on the storage lever 22. The outline 45 of the control cam is drop-shaped, its profile on the with respect to the cam rotation axis 46 radially outer side asymmetrical the opposite cam inside can be formed. The Corresponding edge profiles on the surfaces 23, 29 are counter-profiled for this purpose. Because the pawl 20 only has a short actuating arm 26, which is not the large one Counter-control surface 29 needs to bear, its focus is very close to his Pivot 15. Inertial forces that result in a crash are therefore low. Unwanted automatic lifting of the pawl 20 cannot occur come more. This easily increases security to over 30 times Acceleration of gravity reached. This short design results because the Counter control surface 29 no longer belongs to the pawl. Therefore, the can also Fig. 1 apparent return spring 24 of the pawl designed weaker if necessary become. This in turn has the consequence that the required actuating forces for Lifting the pawl 20 from the catch 11 become lower. It is a easy opening possible.

Reference symbol list:

10

closing part

10 '

Release position of 10

11

catch

12

Return force arrow of 11

13

Bearing pin of 11

14

Inclusion in 11 for 10

15

Pivot point for 20

16

Advance from 11

17

Main rest of 11

18

Return spring for 11

19

Swivel angle of 11 (Fig. 2)

20

pawl

21

Locking arm of 20

21.1

Auxiliary line for 47 in rest position (normal case)

21.2

Help line for 47 in open position (normal case)

21.3

Guide line for 47 at the start of charging (normal case)

21.4

Auxiliary line for 47 in intermediate turning position (in the event of a crash)

21.5

Auxiliary line for 47 in final rotation position (in the event of a crash)

22

Memory link, memory lever

23

Control surface on 22nd

24

Return spring for 20

25

Arrow of the spring force of 30

26

Arm of 20

27

Arrow of the rotary movement of 47 when unlocking

28

Arrow of the spring load of 20

29

Counter control surface at 22 for 47 in the event of a crash

30

power storage

31

first profile position of 47

32

Shoulder on 22

33

Counter shoulder on 20

34

flat end of 22

35

Outbreak at 22, eyelet

36

first leg at 34 (Fig. 2)

37

second leg at 34 (Fig. 2)

38

connecting web between 36, 37 (Fig. 2)

39

second profile position of 47

40

Motor, possibly with gear

41

Angular range when unloading 30 (Fig. 2)

42

third profile position of 47

43

Partial angle of unloading (Fig. 4)

44

Angular range for motorized opening in the event of a crash (Fig. 5)

45

Outline profile of 47

46

Axis of rotation of 47

47

Working link, cams

48

Reverse rotation arrow of 47, reverse rotation (Fig. 3, 5)

49

fourth profile position of 47

50

Angular range for loading (Fig. 3)

51

Attack point of the first sensor at 11

52

Attack point of the second sensor at 20

Claims (15)

1. Door lock, in particular for motor vehicles,
   having a rotary latch (11), into which during closing of the door a closing part (10) travels and swivels the rotary latch (11) out of an open position into at least one detent position,
   having a pawl (20), which is spring-loaded (28) and in its detent position falls into a main notch (17) situated in the rotary latch (11),
   having an operating element (47), which is used indirectly to lift out the pawl (20) and is preferably driven by an electric motor (40),
   having a storage element (22), which is loaded by an energy storage mechanism (30) and which with a shoulder (32) abuts against a counterpart shoulder (33) provided [on the] pawl (20) in order by discharging the energy storage mechanism (80) to lift the pawl (20) out of its detent position in the rotary latch (11),
   having a control face (23) on the storage element (22), against which control face (23) the operating element (47) travels in a first motor drive phase in order to charge the energy storage mechanism,
   and having a counterpart control face (29), against which the operating element (47) travels during lifting of the pawl (20) out of the rotary latch (11) in a second motor drive phase, which is staggered relative to the first,
   wherein the amounts of energy of the motor (80) that are summoned up successively in the first and second motor drive phase are used to lift out the pawl (20),
   characterized in that not only the control face (23) but also the counterpart control face (29) are situated on the storage element (22),
   and that the additional motor power needed to lift out the pawl (20) passes indirectly, via the storage element (22), to the pawl (20),
   and hence the amounts of energy summoned up successively in the first two motor drive phases are then transmitted simultaneously from the shoulder (32) of the storage element (22) to the counterpart shoulder (33) of the pawl (20).
2. Door lock according to claim 1, characterized in that the storage element comprises a storage lever (22) pivotally mounted paraxially and/or coaxially relative to the pawl (20)
   and that the counterpart shoulder (33) of the pawl (20) is disposed on an arm of the pawl (20), which arm is of a shorter design than the arm of the storage lever (22) that has the control face (23).
3. Door lock according to claim 1 or 2, characterized in that the storage element and/or the storage lever (22) have a break-through (28), into which the operating element (47) of the motor (77) engages.
4. Door lock according to one of claims 1 to 3, characterized in that the break-through (78) is situated in a substantially planar region (34) of the storage element and/or storage lever (22).
   and that the mutually opposing sides of the break-through (35) form the control face (23) and the counterpart control face (29) for the operating element (47) rotatable therebetween.
5. Door lock according to claim 3 or 4, characterized in that at least a portion (34) of the storage element and/or storage lever (22) subdivides into two limbs (36, 37), which between them form the break-through (78) .
6. Door lock according to claim 5, characterized in that the two limbs (36, 37) are unconnected and lend the storage element and/or storage lever (22) a fork shape.
7. Door lock according to claim 5, characterized in that the two limbs (36, 37) are connected to one another by a web (38) and lend the break-through (35) in the storage lever (22) the shape of an eye.
8. Door lock according to claim 7, characterized in that the eye (35) has approximately a long oval shape
   and that the - viewed in swivelling direction of the storage lever - mutually opposing edges of the eye (78) form the control and counterpart control faces (23, 29) .
9. Door lock according to one of claims 1 to 8, characterized in that the operating element comprises a profiled oblong cam (47), which is radially offset relative to the axle of rotation (46).
10. Door lock according to claim 9, characterized in that the cam (47) has a drop-shaped, optionally asymmetrical profile.
11. Door lock according to claim 9 or 10, characterized in that the cam (47) has a profile adapted to the edge profile in the eye opening (78) and, in dependence upon the operating state of the lock and angle of rotation of the cam (47) comes into abutment with different profile points (31, 39, 42, 49) on the edge profile (23; 29) of the storage element and/or storage lever (22) that are radially offset relative to the cam axle of rotation (46).
12. Door lock according to one of claims 1 to 11, characterized in that the operating element and/or the cam (47) during charging and during discharging of the energy storage mechanism (30) rotate in the same direction of rotation.
13. Door lock according to one of claims 1 to 11, characterized in that the operating element during charging (50) of the energy storage mechanism (30) is set in rotation in a, compared to the discharging (41), in mutually opposite directions of rotation (48, 49) between the two profile edges of the break-through and/or the eye (35).
14. Door lock according to claim 12 or 13, characterized in that for detecting the door position control means are provided, which comprise sensors (51; 52) and a control logic connected to the sensors.
15. Door lock according to claim 14, characterized in that the control means comprise two sensors (51; 52), of which the one sensor (52) responds indirectly or directly to a specific position of the rotary latch,
    while the other sensor (51) responds to a defined position, such as the inward fall of the pawl (20) at the main notch (17) and/or at the preliminary notch (16) of the rotary latch (11).

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