DE102007024564A1 - Motor vehicle locking system for motor vehicle, has locking mechanism which has rotary latch and safety catch and rotary latch is pivotably mounted at axis and safety catch is also pivotably mounted at another axis - Google Patents

Abstract

The motor vehicle locking system (15) has a locking mechanism (1) which has a rotary latch (2) and a safety catch (3). The rotary latch is pivotably mounted at an axis (4) and the safety catch is also pivotably mounted at another axis (5). One of the locking surface face the locking mechanism in closed condition and a sliding element is guided in a guidance that is loaded with a spring.

Description

The The present invention relates to a vehicle locking system with a ratchet, the at least one catch and at least an associated pawl having. The catch is about a first axis and the pawl rotatably mounted about a second axis. The invention finds particular Application in the automotive sector, preferably installed in doors and Flaps.

in the The state of the art are locks for doors from Motor vehicles are known, the one with a locking pin having cooperating catch, wherein the catch in a closed position is locked by a pawl. For this purpose points the catch at least one locking lug on its outer peripheral contour on the pawl is brought to bear to the rotation of the lock spring-loaded rotary latch. When triggering must now the pawl lifted back from the latch and pivoted to enable rotation of the catch again. Both the contact and the release occur partly abrupt Strain, which may be undesirable Noise and / or lead to a high power requirement.

task It is therefore the object of the invention with reference to the prior art at least partially solved problems. In particular, a should Motor vehicle locking system can be specified, which can be opened with significantly reduced triggering forces and improved damping having.

These Tasks are with devices according to the features of the claim 1 solved. Further advantageous embodiments of the invention and especially preferred applications are given in the dependent formulated claims. It should be noted that the features listed individually in the dependent formu patent claims in any technologically meaningful way combined with each other can be and define further embodiments of the invention. Furthermore are the in the claims specified features in the description specified and explained, wherein further preferred embodiments of the invention are shown.

Therefore becomes a motor vehicle locking system proposed that a locking mechanism with at least one catch and at least one associated pawl having. The catch is about a first axis and the pawl rotatably mounted about a second axis, wherein at least one the lock provided and each other in the closed state facing restricted areas at least one, in a leadership run, Sliding element is provided, which is loaded with a spring.

By the arrangement of a sliding element between the relative to each other moving parts of the locking mechanism, catch and pawl, the to open the locking required release force considerably reduced. While so far the mutually facing locking surfaces of catch and pawl large area to each other It was through the use of the sliding element that it had to slide possible, to limit the sliding movement to the contact of sliding element with a blocking surface. there can lock area and Slider to be matched, making a special low-resistance sliding is possible. This can be, for example with regard to the geometry, the surface roughness or the material pairings happen. In addition to the gliding, it is of course also possible, rolling movements perform. This For example, by a rotating ball or by stored Rolls happen. Will now be the locking surfaces of the catch and the pawl, for example, by the restoring forces of a Door seal, pressed against each other, so there is a contact only between the slider, which can optionally be arranged on one of the two components, and the opposite Blocking surface. The total contact area thus becomes one point or reduced line contact, resulting in a significant reduction the one to open the locking forces required results.

With In other words, the slider is for example as a separate Part group formed captive with the catch and / or the pawl is connected and in the blocking surface (detent position) extends into it. The leadership is designed, for example, in the manner of a receptacle in which at least the (at least one spring) and / or (at least temporarily and / or partially) the (at least one) sliding element is positioned. Especially the sliding element and / or the spring is movably arranged in the guide, can therefore be moved, for example, in the leadership. Prefers is that the spring and the slider represent two separate parts, which are permanently connected with each other.

Moreover, the arrangement of a spring-loaded sliding element of the present invention achieves an improved damping of the locking mechanism. So it comes when closing due to the deformed door seals, especially of motor vehicle doors, regularly to so-called overstroke positions with which a secure engagement of pawl and rotary latch should be effected. In this case, for example, a rotary latch is briefly further rotated by the locking bolt beyond a closed position, before the door seal itself the relaxed and thus the locking pin moves back together with the catch. In this return movement from the overstroke position, it can lead to a sudden encounter of the locking surfaces of the catch and pawl. Due to the spring-loaded sliding element, as proposed here, these movements can now be effectively damped.

When very cheap it has proven to be when the sliding element as a ball or Cylinder is formed. With such sliding elements can be a point or line contact between slider and the opposite blocking surface be achieved, resulting in a suitable choice of material combinations and / or surface roughness yet a cheaper one sliding friction coefficient can be set. About that can out especially balls of mass production, such as in the ball bearing manufacturing, can be used and are thus available at low cost. Preferably are the sliding elements as balls or cylinders with a radius of curvature formed in the range of 0.5 to 12 mm [millimeters].

Especially it is effective in the motor vehicle locking system according to the invention, when the spring force acts in the normal direction to the blocking surface. hereby will the available Standing spring force particularly efficiently exploited. In the case of an overstroke position The spring force can thus also almost undiminished or completely undiminished manner for damping contribute. In other embodiments can basically but also be provided that the spring is a force on the slider exerts directed only partially in the normal direction to the blocking surface is. It is only necessary that the spring directly or indirectly, indirectly or directly on the sliding element exerts a force the at least one to the blocking area directed component.

at a particularly preferred embodiment of the motor vehicle locking system is provided that the blocking area at least one portion of the locking mechanism has at least one recess, which is designed for partial reception of the sliding element. The Recess (in the area of the locking position or blocking area) can while for example U- or V-shaped be formed so that a ball used as a sliding element by the spring force in the direction of the lowest point of the U- or V-shaped Depression pressed becomes. In this case, the U- or V-shaped Well be arranged so that the pawl, which, for example, the Sliding element, in this movement at the same time in one closed position is turned. This means that this locking after overcoming the highest Make the U- or V-shaped Deepening, for example, can be self-locking. Another possible Embodiment of a Deepening can, for example, a complementary formed to the sliding element spherical depression be, in which the slider is immersed after sweeping the blocking surface. Depending on the desired balance of power in the latching, which causes by the depression described will, can different parameters are varied. One parameter is for example the Immersion depth with which the sliding element dips into the depression. About that can out but also the touch types, such as point contact at one or more points or Line contacts on one or more lines to be varied. Farther can the geometries of the sliding elements, such as ball radius or cylinder radius or cylinder length, as well as their materials and surface roughness be varied within the scope of the invention to the desired Verrastungskräfte to obtain. The same applies by the way also for the design of the spring to load the slider. in this connection can also suspension travel length and Spring constant to be adapted to the respective conditions.

Especially in connection with non-spherical or cylindrical sliding elements, it has proved to be advantageous, if the sliding element at least in a contact region, a first radius of curvature which is smaller than a second radius of curvature of the contacted Blocking surface. In this way, if necessary, it can be ensured that always a point contact or line contact at a single point occurs. This can be special low sliding forces and thus particularly low release forces of the locking mechanism can be achieved.

There Motor vehicle locking systems special requirements in terms of their service life and load capacity suffice It is also proposed to manufacture the sliding element from steel. In particular, steel balls are particularly durable and inexpensive available. in principle are natural Other materials used, such as plastics or ceramics, but with steel is the permanent form accuracy and abrasion resistance guaranteed so that a consistent operating behavior of the locking ensured is. Optionally, if necessary, a sound-absorbing protective layer of the Covering steel formed sliding element, or a plastic ball provided with a metallic sliding layer be.

Especially has a motor vehicle locking system proven, which has a recess formed in the rotary latch is and in which the pawl is a normal direction to the blocking surface guide has, in which a spring-loaded ball is guided as a sliding element.

Furthermore beats the invention provides a motor vehicle, which is a motor vehicle locking system according to a said embodiments having.

Further Advantages of the invention are in connection with the following embodiments and the drawing. It shows:

1 : a locking mechanism according to the invention in a side view;

2 : the detail A after 1 in an enlarged view, wherein the locking mechanism is shown in the closed state; and

3 : the detail A after 1 in an enlarged view with partially deflected pawl.

In 1 is a locking mechanism according to the invention 1 consisting of a rotary latch 2 and a pawl 3 shown in a side view. The catch 2 is a first axis 4 rotatably mounted and the pawl 3 around a second axis 5 , The illustrated catch 2 gets through the pawl 3 prevented from turning clockwise around the first axis 4 to turn. The locking mechanism 1 is thus shown in the closed state. In this state, the catch encompasses 2 a locking bolt 6 , The locking bolt 6 For example, on the body side of a vehicle indicated here only 16 be attached, whereas the locking mechanism 1 door side as part of a motor vehicle locking system 15 is mounted. This is the locking mechanism 1 suitable to lock or unlock the door with respect to the vehicle.

In 2 is the locking mechanism 1 to 1 in the partial area of the detail A shown enlarged. On the left side is the catch 2 and on the right side the pawl 3 , In the closed state, as in 2 is shown, there are two restricted areas 7 and 8th across from. The first blocking area 7 is at the catch 2 formed and the second locking surface 8th at the pawl 3 , The pawl 3 points away from the second blocking surface 8th a hole 9 which is big enough to make a bullet 10 take. The hole 9 thus forms a guide 11 , The hole 9 is substantially in the normal direction, ie at a 90 ° angle to the surface of the blocking surface 8th arranged. Also in the normal direction 17 to the blocking area 8th a spring acts 12 inside the hole 9 is arranged and which is a force on the ball 10 exercises, so this against the first blocking surface 7 the catch 2 is pressed. The ball 10 thus provides a sliding element 13 which is with the pawl 3 is connected and serves to on the opposite first blocking surface 7 the catch 2 to slide along and the pawl 3 to lock in their locked position.

At the first blocking area 7 is beyond that a deepening 14 formed, in which the ball 10 located in the illustrated position. The depression 14 has a radius of curvature 18 greater than the second radius of curvature 19 the ball 10 is. This will lock the ball 10 in the depression 14 achieved, causing the pawl 3 is fixed in the position shown. Inadvertent opening, ie counterclockwise about the second axis 5 beginning twisting of the pawl 3 , is thus prevented. To open the locking mechanism 1 is only a small force to apply, through which the ball 10 from the depression 14 is moved out. Then the ball slides 14 very low friction over the first locking surface 7 the catch 2 until the locking mechanism 1 is open.

In the illustrated embodiment, the spring 12 stuck inside the hole 9 assembled. Also firmly connected are the spring 12 and the ball 10 with each other, leaving the ball 10 when open, not out of the guide 11 can fall out. In other embodiments, however, the use of securing means may be provided to the ball 10 together with the spring 12 or alone on the pawl 3 to fix. This can be done, for example, by pressing in the ball 10 through a bottleneck in the hole 9 happen. Another possibility is z. B. a locking ring in the hole 9 to screw, whose inner diameter is smaller than the ball diameter, so that the ball 10 only partially protrudes through this circlip and the opposite first locking surface 7 can touch.

In the rule is the leadership made of steel. But it can also be provided that the guide made of plastic or natural rubber accomplished is. As beneficial has also been found, the leadership with a highly effective lubricant, such as a grease, fill. Thus, the invention can be developed.

In 3 is now the locking mechanism 1 shown in a partially open state. On the left side is the catch again 2 and on the right side the pawl 3 , The ball 10 is in the state shown from the recess 14 moved out. This is the spring 12 slightly compressed and the ball 10 wanders along the guide 11 through the hole 9 into this. In the manner shown can be formed with the device according to the present invention in the form of Gesperres 1 closing or opening the motor vehicle locking system be accomplished with very little force. In addition, the sliding element shown here dampens the non-return movement of the rotary latch, as it occurs in an overstroke with subsequent check movement. It is avoided a constant interference fit of the two bearing surfaces by reducing the contact area on a line or point contact the operating force noticeably reduced. On the above parameters, such as surface roughness, material combinations, spring constant geometries, an adaptation of the invention in the widest areas to the particular needs of the intended application can be made.

The the present invention is thus not limited to the illustrated embodiments limited. It are rather numerous modifications of the invention in the context of claims possible.

1

ratchet

2

catch

3

pawl

4

first axis

5

second axis

6

locking pin

7

first blocking surface

8th

second blocking surface

9

drilling

10

Bullet

11

guide

12

feather

13

Slide

14

deepening

15

Motor vehicle locking system

16

vehicle

17

normal direction

18

first radius of curvature

19

second radius of curvature

Claims (9)

Motor vehicle locking system ( 15 ) with a locking mechanism ( 1 ), the at least one catch ( 2 ) and at least one associated pawl ( 3 ), in which the catch ( 2 ) about a first axis ( 4 ) and the pawl ( 3 ) about a second axis ( 5 ) is rotatably mounted, wherein at least one of the locking ( 1 ) and facing each other in the closed state locking surfaces ( 7 . 8th ) at least one, in a leadership ( 11 ) guided sliding element ( 13 ) provided with a spring ( 12 ) is charged. Motor vehicle locking system ( 15 ) according to the preceding claim, wherein the sliding element ( 13 ) as a ball ( 10 ) or cylinder is formed. Motor vehicle locking system ( 15 ) according to one of the preceding claims, wherein the spring force in the normal direction ( 17 ) to the blocking area ( 7 . 8th ) acts. Motor vehicle locking system ( 15 ) according to one of the preceding claims, wherein the guide in the normal direction ( 15 ) to the blocking area ( 7 . 8th ) is aligned. Motor vehicle locking system ( 15 ) according to one of the preceding claims, wherein the blocking surface ( 7 . 8th ) at least one depression ( 14 ), which for partially receiving the sliding element ( 13 ), is trained. Motor vehicle locking system ( 15 ) according to one of the preceding claims, wherein the sliding element ( 13 ) at least in a contact region a second radius of curvature ( 19 ) which is smaller than a first radius of curvature ( 18 ) of the contacted blocking area ( 7 . 8th ). Motor vehicle locking system ( 15 ) according to one of the preceding claims, wherein the sliding element ( 13 ) is made of steel. Motor vehicle locking system ( 15 ) according to any one of the preceding claims, wherein the recess ( 14 ) in the catch ( 2 ) is formed and the pawl ( 3 ) in the normal direction ( 17 ) to the blocking area ( 8th ) lying leadership ( 11 ), in which a spring-loaded ball ( 10 ) as a sliding element ( 13 ) is guided. Motor vehicle ( 16 ), comprising at least one motor vehicle locking system ( 15 ) according to any one of the preceding claims.