EP2440730A1

EP2440730A1 - Lock having restricted guidance for a pawl

Info

Publication number: EP2440730A1
Application number: EP10737242A
Authority: EP
Inventors: Thorsten Bendel; Serkan Gülkan; Karsten Barth; Ulrich Weichsel
Original assignee: Kiekert AG
Current assignee: Kiekert AG
Priority date: 2009-06-12
Filing date: 2010-05-19
Publication date: 2012-04-18
Anticipated expiration: 2030-05-19
Also published as: EP2440730B1; US10132109B2; WO2010142261A1; DE102010003483B4; US20120068480A1; DE102010003483A1

Abstract

The invention relates to a lock for a motor vehicle, having a locking mechanism which comprises a rotary latch (4), a forward notch pawl (13), a main notch pawl (6), a blocking lever for blocking the main notch pawl, a catch of the forward notch pawl that is able to rotate the main notch pawl out of the engaged position thereof, characterized in that the catch is a lateral contour region of the forward notch pawl (13).

Description

Lock with Zwangungsführung for pawl

The invention relates to a lock for a motor vehicle with a locking mechanism comprising a rotary latch and two pawls, with which the catch can be locked in each case a closed position. The one pawl locks the catch in the main catch (hereinafter referred to as "main catch pawl") .The other pawl locks the catch in the pre-catch (hereinafter called "pre-catch pawl"). The lock also includes a blocking lever for said main catch - Sperrklin ke. Such a lock is known from the document DE 10 2007 003 948 A l.

A rotary latch of a motor vehicle lock has a fork-shaped inlet slot, into which a locking bolt of a vehicle door or a vehicle door, when the vehicle door or vehicle door is closed. D7er locking pin then rotates the catch from an open position to a closed position. If the catch has reached a closed position, then the locking pin can not leave the inlet slot of the catch. In a closed position a Sperrklin ke locked the catch, so that it can not be rotated back into the open position.

There are locks with two detent positions, which can be taken in succession during the closing of the catch, namely the so-called pre-rest and the so-called main rest.

In order to avoid that a Sperrklin ke is not moved unplanned out of its locked position, a blocking lever may be provided which blocks such movement when the catch is locked. Such a blocking lever is required in the known from the document DE 1 0 2007 003 948 A lock for the Hauptrast- pawl, since the catch and the Hauptastast pawl are constructed so that the Sperrklin ke in the main catch, the Haupttrast- pawl the latched position presses. The known from the document DE 102007003948 Al, rotatably mounted blocking lever is biased by a spring. Due to this ^ι bias the blocking lever exerts a pressure on the primary position - from pawl toward the rotary latch when the rotary latch is not located in the main catch position. This pressure is responsible for moving the main latch pawl into its latched position when the latch reaches the main latch. The bias then continues to ensure that the blockage lever is finally moved to the blocking position, so that the vehicle door or vehicle door is so completely closed.

To unlatch the lock, the blockage lever is rotated counter to its bias by means of the pre - ratchet pawl until the blockage lever releases the main catch pawl. The main catch pawl is then urged out of the latched position by the catch, or caught by a catch of the pre-catch pawl, and thus moved out of the latched position. The driver is a slot in the pre-catch pawl into which a bolt attached to the main catch pawl extends. Following this, the catch rotates due to a corresponding bias of the main load in its open position. The locking bolt can now be moved out of the inlet slot again and the corresponding vehicle door or vehicle door can be opened.

It is an object of the invention to provide an inexpensive lock for a motor vehicle with little space.

The object of the invention is achieved by a lock with the features of the first claim. Advantageous embodiments emerge from the subclaims. To solve the problem, a lateral contour area of the pre-locking pawl serves as a driver, which is capable of detecting and moving a bolt of the main-locking pawl. As a result, then the main locking pawl can be rotated out of its locked position out. By no slot serves as a driver, material and thus space is saved.

In one embodiment, the main catch pawl is urged out of the latched position by the catch, as in DE 102007003948 A1, and the pin attached to the main catch pawl is made of plastic. In general, it is necessary due to the stresses occurring for stability reasons to produce such a bolt made of metal. However, the load is relatively small in this embodiment, since the main locking pawl is pushed out of the latched position by the catch. This pressure is already sufficient to move the Hauptrast- pawl out of the locked position after release of the main-locking pawl by the blocking lever out. Even if, nevertheless, the driver should engage the bolt, so only a small force is required to turn the main-locking pawl out of the latched position. It is therefore not necessary to make the bolt of metal. It is sufficient a relatively lighter, cheaper plastic existing bolt, which consists for example of polypropylene.

In one embodiment of the invention, the main-locking pawl on a lever arm on which the bolt is mounted. This lever arm, which consists in particular of metal, is encased with a plastic or consists at least partially of plastic. The remainder of the main catch pawl is made of metal. In this case, there is a limiter for the wholly or partially made of plastic lever arm, which limits the rotational movement of the main-locking pawl in the latched position. The limiter ensures that the Hαuptrαst pawl is not rotated too far due to a too fast rotational movement and its inertial mass.

The limiter advantageously also serves as a stop for the first pawl, which is preferably biased in the latched position by a spring. If a preload is present, then the stop prevents the pre-catch pawl from being rotated past its latched position. The main-locking pawl, however, is not biased. The corresponding lever arm of the main catch pawl therefore does not load the limiter regularly, especially as the main catch pawl is pushed by the catch in the opposite direction of rotation and thus away from the limiter.

The limiter preferably consists of a metallic pin, which is enveloped by a sheath of elastic material. The impact of the relevant lever arm of the pre-locking pawl is damped. In addition, the plastic of the main catch pawl is spared.

To bias the pre-locking pawl, this preferably comprises a further lever arm which terminates in a region which extends perpendicular to the housing wall, on which the rotary latch is rotatably mounted. There is such an area available against which an arm of a torsion spring can press. In addition, this vertical area is also used to capture the pre-locking pawl, and preferably to move motorized, so as to unlock the lock when the associated vehicle door or vehicle door is opened. The overall height of the lock therefore does not have to be increased if the two pawls are arranged one above the other in the manner known from DE 10 2007 003 948 A 1. It is then avoided by the vertical course that the base of the castle must be increased. Show it

Figure 1: closed position of a lock with transparent

Position pawl;

FIG. 2: closed position of the lock from FIG. 1; FIG. 3: Opening position of the lock from FIG. 1; FIG. 4: intermediate position of the lock from FIG. 1

Hereinafter, an illustrated in the figures embodiment of the invention will be explained in more detail. On the basis of the embodiment advantages of further embodiments of the invention are illustrated.

FIG. 1 shows a plan view of a housing wall 1 of a vehicle lock. The housing wall 1 is provided with an inlet slot 2 into which a locking bolt 3 of a vehicle door or a vehicle door enters when the associated vehicle door or vehicle door is closed. The rotary latch 4 is rotatably mounted on the housing wall 1 and can be rotated about its mounting axis 5. In the figure 1, the main load is shown, in which the locking bolt 3 located in the housing wall inlet slot 2 is enclosed by the inlet slot of the rotary latch so that the locking pin 3 can not be moved out of the housing wall inlet slot 2. The corresponding door or the flap of the vehicle is thus closed. Shown is the main catch, because a turning back of the rotary latch 4 according to the arrow direction 22 shown in the direction of the open position by the main catch - locking pawl 6 is prevented as shown. The main catch - pawl 6 is also mounted on the housing wall 1 and can be rotated about its mounting axis 7. The rotary latch is preferably biased by a spring, not shown, in the open position. Due to this bias, the catch presses against a stop of the main catch - pawl with a oblique course. This oblique course pushes out the main catch pawl from the latched position.

If the catch is not biased by a spring, at least the locking pin 3 causes a rotational movement of the rotary latch 4 in the direction of open arrow 22, when an associated vehicle door or vehicle door is opened. The associated torque then urges the main catch pawl 6 out of the latched position.

However, this is prevented in the main load when the vehicle door or vehicle door is locked by a blocking lever 8 as shown. The blocking lever 8 is also mounted on the housing wall 1 and can be rotated about its mounting axis 9. At a lateral contour region of the blocking lever 8 is an arm 10b of a spring 10 at. The spring 10 is biased so that the arm 10b of the spring 10 pushes the blocking lever in the direction of the blockage position shown (in the direction of arrow 11). The rotational movement of the blocking lever caused thereby is limited, as shown, by a stop 12, which is fastened to the housing wall 1 in the form of a protruding bolt. Through this stop 12, the blocking lever always reaches very precisely in the always same blocking position, which is particularly important for proper functioning. The spring 10 is mainly arranged laterally next to the blocking lever 8 and next to a Vorrastsperrklinke to allow a low height. Only one arm 10a of the spring 10 extends beyond the blocking lever 8.

Above the main catch pawl 6, a pre-locking pawl is arranged. This is also rotatably mounted on the axis 7 and can therefore be rotated about this axis 7. The outline 13 of the pre-locking pawl is indicated by dotted lines. The pre-locking pawl 13 comprises a bolt 14, which extends from the pre-locking pawl in the direction of the housing wall 1 down. At this bolt 14, at the Vorrαst pawl is attached, the other arm 10a of the spring 10 is applied. The other arm of the spring 10 presses in the direction of the bolt 14 along the arrow 15. In the main catch, the bolt 14 also bears against a lateral contour region of the blocking lever 8. If the pre-locking pawl 13 is rotated in the direction of the arrow 16, the bolt 14 causes the blocking lever 8 is rotated out of the blocking position. The spring arm 10a may follow the movement of the stopper 14, so that the rotation of the pre-locking pawl 13 is not hindered by a back pressure that would otherwise emanate from the spring arm 10b. This facilitates the rotation of the blocking lever 8 by the pawl 13 for the pre-restraint from the blocking position out. If the blocking lever 8 is thus moved out of the blocking position, then the main-locking pawl 6 is pushed out of its shown locked position by the rotary latch. Additionally or alternatively detects a lateral contour portion of the pre-locking pawl 13 as a result of said rotational movement a protruding serving as a stop pin 17 which is mounted on the main catch pawl 6. This bolt is made of plastic and has been made in one piece with the plastic portion 6a. This has the consequence that the main catch pawl 6 is rotated out of the locked position shown and releases the catch. This then pivots in the direction of the arrow 22 in the direction of the open position and finally releases the locking pin 3. The associated door or flap can then be opened.

The catch especially exerts a sufficiently great pressure on the main catch pawl when a door seal pressure introduces strong opening forces into the catch. However, if a door seal pressure is relatively low, the problem may arise that the catch is not able to initiate a sufficiently large torque in the main ratchet pawl and the main ratchet pawl can not be pushed out of the latched position. The aforementioned lateral contour area of the pre-locking pawl ensures that the Hαuptrαst pawl is safely excavated even at too low a door seal pressure from its latched position, and in comparison to the known from DE 102007003948 Al solution in a simpler technical way.

The pre-locking pawl 13 may also lock the catch 4 when a protruding pin 18 of the catch 2 impinges on the lateral contour area 19 of the pre-locking pawl 13 and thus prevents rotation of the pawl in the open position according to arrow 22. The pre-locking pawl 13 is preferably biased by a spring, not shown, in the direction of its latched position. An arm of this spring then presses against an end 21 which is perpendicular to the wall 1. A protruding pin 20 which serves as a stop and which is fixed on the housing wall 1 prevents further rotation of the pre-locking pawl beyond its latched position. This bolt 20 is preferably made of metal existing pin for reasons of stability.

The main catch pawl 6 is also made of metal and is preferably not directly spring loaded. The main-locking pawl 6 is then instead suitably rotated solely by other components and in particular by moving the catch 4, the pre-locking pawl 13 and / or the blocking lever 8, so for example by a rotational movement of the blocking lever 8 in the latched position ( Main stop). The corresponding rotation of the blocking lever is effected by the controlled bias of the spring 10.

In order to properly move the main catch pawl into the latched position by means of the blocking lever, hook-shaped endings 6b and 8a have proven to be particularly suitable. The head of the hook 6b of the main catch pawl acts as a stopper for the catch. The hook tip of the hook 6b is blocked by the head of the hook 8a in the main branch. If the blocking lever 8 from the turned off blocking position, so hook the two hooks 6b and 8a into each other. Finally, the tip 6b pushes the hook 8a outwardly so far that the lever arm 8b lifts off from the bolt 14, thus increasing the preload of the spring 10 (see also FIG. 3). The rotation of the pre-locking pawl 13 is thereby further relieved, since it no longer acts on the blocking lever 8 by its moment of inertia. The movement of the tip 6b or the main-locking pawl 6, which is responsible for the removal of the arm 8b of the bolt 14 is then caused by the rotating in the open position rotary latch by the lateral contour portion 4a against the then adjacent lateral contour region of the hook 6b presses. As shown, the end 4b of the contoured region 4a is angled outward (as viewed from the rotary catch), so as to rotate the main-locking pawl, and thus the hook 6b, particularly far outward along the arrow 16. As a result, the lever arm 8b is removed particularly far from the stop 14 and a desired high bias by the spring 10 is then provided. Advantageously, the hook tip of the hook 6b is longer than the hook tip of the hook 8a, so as to be able to provide a particularly large bias of the spring 10 can. Since the hook 8a does not have to achieve such an effect, it is comparatively short. Overall, the desired movement can be ensured so particularly reliable.

If the catch is rotated from the open position in the closed position to the pre-rest, then locks the pre-locking pawl in its latched position by this is then rotated in the opposite direction to the arrow 16 until a further rotation as shown in Figure 1 by the stop 20 is prevented. In this pre-locking position, the corresponding lateral contour region of the hook 6b still bears against the lateral contour region 4a. This blocks rotation of the blocking lever 8 such that the arm 8b is moved in the direction of the arrow 11. The bias of the spring 10 is thus further increased in a desired manner. Finally gives the lateral contour area 4α, which extends from the corner point 4b to the corner 4c, the Hαuptrαst pawl 6 free, so there is a high bias voltage to reliably move the main pawl latch into the latched position when an associated vehicle door or vehicle door is closed.

In order to rotate the pre-locking pawl out of its latched position so as to rust the lock, it is grasped and turned on the handle portion 21. The detection and rotation of the pre-locking pawl 13 can be done by means of a motor or by manual operation. Since the pre-locking pawl can be rotated by a motor also back, a spring is not mandatory, which presses the pre-locking pawl in the direction of its latched position. For speed and safety reasons, however, the provision of such a spring is advantageous.

In FIG. 2, the lock of FIG. 1 is shown. However, the pre-locking pawl 13 is now not transparent. This therefore partially obscures u. a. the main locking pawl 13. In the figure 2 it is indicated that the area 21 projects perpendicular to the wall 1 upwards to detect the pre-locking pawl without increasing the space and preferably to be able to rotate out of the latched position by motorized. Next, the pre-locking pawl is biased by a prestressed spring arm 40a of a torsion spring 40 in the locked position, which rests against the perpendicular end portion 21.

FIG. 3 illustrates the position of the rotary latch 4, the main latch pawl 6, the blocking lever 8, the spring 10 and the latch bolt 3 in the open position. In addition, the position of the pre-locking pawl 13 is sketched by a transparent representation. The locking pin 3 can now be moved out of the inlet slot and the associated door or flap can be opened. The tip of the hook 6b of the main catch pawl pushes the hook-shaped lever arm 8a and so that the lever arm 8b of the blocking lever 8 far outward. The spring arm 10b is thus also pressed far outward and the spring 10 is highly biased overall. The lateral tip 4b of the lateral contour 4a, which extends to the corner point 4c, ensures that the lever 8b is pushed particularly far outward by the hook 6b and thus the spring 10 is particularly strongly biased. The figure 3 also illustrates that the pre-locking pawl 13 does not contribute to the increased bias of the spring 10.

If a vehicle door, through which people get in and out, or vehicle flap slammed with the locking pin 3, the pivot pin 3 rotates the rotary latch 4 back in the direction of the closed position. The back of the hook 6b then slides along the lateral contour 4a. Although this leads to the fact that the bias of the spring 10 initially decreases a bit, since then the blocking lever 8 initially rotates a little back in the direction blocking position. Allerding also slides the bolt-shaped stop 14 in the direction of lateral contour 19 of the pre-locking pawl 13 and so finally releases the pre-locking pawl 13 so that it finally rotates in the locked position due to their bias and thereby increases the bias of the spring 10 again ,

In the figure 4, an intermediate position between the open position and closed position of the rotary latch 4 is shown. If the rotary latch 4 is rotated a little further in the direction of the closed position by the bolt 3, then the pre-locking pawl 13, shown transparently, engages in its latched position and then biases the spring 10 more strongly. The back of the hook 6b is pressed by the lever arm 8a of the biased by the spring 10 blocking lever 8 against the lateral contour portion 4a of the rotary latch.

Claims

claims

A lock for a motor vehicle having a ratchet comprising a catch (4), a pre-ratchet pawl (13), a main ratchet pawl (6), a blocking ratchet for blocking the main ratchet pawl, a catch of the pre-ratchet pawl, the main catch pawl is able to turn out of its locked position, characterized in that the driver is a lateral contour portion of the pre-locking pawl

(13).

2. Lock according to claim 1, wherein the main catch pawl is provided with a bolt (17), which is able to take the driver.

3. Lock according to the preceding claim, wherein the bolt (17) consists of plastic.

4. Lock according to one of the preceding claims, with a mechanism of action between the main-locking pawl and rotary latch such that the catch presses the main-locking pawl from its latched position.

5. Lock according to the preceding claim, wherein the bolt with a wholly or partially made of plastic lever arm (6a) of the main catch pawl (6) is integrally connected.

6. Lock according to one of the preceding claims with a limiter (20) for a lever arm (6a) of the main catch pawl (6).

7. Lock according to the preceding claim, wherein the limiter is also a stop for the pre-locking pawl (1 3).

8, lock according to one of the preceding claims, wherein the pre-locking pawl is biased by a spring (40) in the direction of its latched position.

9, lock according to the preceding claim, wherein an arm (40 a) of the spring (40) against one end (21) of a lever arm of the Vorrast-Sperrklin ke (1 3) presses, which runs perpendicular to the wall (1) to the rotary latch (4) is rotatably mounted.

1 0. Lock according to one of the preceding claims, wherein one end (21) of a lever arm of the Vorrast-Sperrklin ke (1 3) is detected and moved for unlocking the lock, which is perpendicular to the wall (1), at the the rotary latch (4) is rotatably mounted.