EP3722543A1 - Closing system for a motor vehicle - Google Patents

Abstract

The invention relates to a locking system for a motor vehicle with a disk-shaped rotary element 1, a drive 3 for rotating the rotary element 1 about an axis of rotation 4 and a lever 2 which can be moved by the rotary element 1. A ramp 5 is provided on the disk-shaped rotary element 1 and the locking system is set up in such a way that the lever 2 can be pivoted by the ramp 5 when the rotary element 1 is rotated by the drive 3. A particularly flexible adaptation to the existing installation space with a particularly high degree of efficiency of the mechanical power transmission can thus be achieved.

Description

The invention relates to a locking system for a motor vehicle with a disk-shaped rotating element, a drive for rotating the rotating element about an axis of rotation and a lever which can be moved by the rotating element.

A locking system for a motor vehicle is generally used to prevent an unplanned opening of a door or flap of a motor vehicle. For this purpose, a locking bolt of a door or flap is usually picked up by a rotary latch of a locking mechanism and held by a pawl in the closed state of the locking mechanism so that the door or flap can no longer open. For the automated opening of the locking system of the locking system, a drive can be provided, which can be e.g. a worm gear can set a disk-shaped rotary element in the form of a worm wheel in rotation, which in turn actuates a lever with the aid of a cam. The lever can release the pawl from the rotary latch by such an actuation so that the door or flap can be opened again. The electrical energy required for the automated opening for the drive is usually provided by an energy source of the motor vehicle.

The space available for a locking system is often limited. The pamphlet DE112009001288T5 discloses a lock arrangement for a motor vehicle, in which a gear with a projection and a pawl lever interacting with the projection each have axes of rotation offset by 90 °. The interaction takes place laterally to the axis of rotation of the gear.

It is also referred to the publications DE102016108565A1 and DE102016108568 A1 pointed out.

It is the object of the invention to provide a further developed locking system.

A locking system according to claim 1 serves to solve the problem. Advantageous embodiments emerge from the subclaims.

A locking system for a motor vehicle with a disk-shaped rotating element, a drive for rotating the rotating element about an axis of rotation and a lever which can be moved by the rotating element is used to achieve the object. A ramp is provided, i.e. present, on the disk-shaped rotating element. The locking system is set up in such a way that the lever can be pivoted through the ramp when the rotary element is rotated by the drive.

By providing a ramp on the disk-shaped rotating element for pivoting the lever, two advantages can be achieved at the same time.

On the one hand, the rotation element and the lever allow a particularly flexible arrangement relative to one another and thus enable the locking system to be fitted compactly into a given installation space geometry. For example, a motor vehicle lock is to be accommodated as the locking system or as a part thereof in an L-shaped installation space geometry or a correspondingly L-shaped housing. By means of the ramp on the disk-shaped rotation element, a pivot axis of the lever can be arranged and supported at an angle offset to one another with respect to the rotation axis of the rotation element. In this way, this arrangement can be placed around the corner, so to speak. This is of particular advantage if the locking mechanism is located in one leg of an L-shaped housing and a connection to an electrical energy source is located in the other leg. The lever, in particular with the locking mechanism interacts, and the drive, which is to be connected to an electrical energy source, can then be installed in different legs of the L-shaped housing.

On the other hand, the provision of a ramp on the disk-shaped rotation element allows pivoting and thus actuation of the lever with particularly low mechanical losses from the interaction of the lever with the ramp. A very high efficiency of the automated locking system can be achieved in this way. Less electrical energy is then required to operate the locking system.

A locking system can be a motor vehicle lock for a door or flap and / or part of a central locking system or closing aid for a motor vehicle. A locking system for a motor vehicle preferably comprises a locking mechanism which, in a closed state, can hold a door or flap in a closed position and, in an open state, allows the door or flap to be opened from the closed position. The lever can be brought into contact with the ramp to interact with the rotating element, i.e. touch the ramp directly and drag along the ramp when the rotating element rotates. Thus, the lever can be moved by a rotational movement of the rotary element depending on the (geometric) course of the ramp in order to bring the locking mechanism into the open or closed state.

A disk-shaped rotating element can be, for example, a gear wheel or a worm wheel. The use of a worm wheel as the disk-shaped rotation element enables a flexible and compact design. A disk-shaped rotating element generally has a diameter that is greater than a thickness of the disk-shaped rotating element. The drive preferably comprises an electric motor and a drive shaft which preferably directly drives the disk-shaped rotary element. In one embodiment, these are Locking system and the drive set up so that the rotary element can be rotated in two directions of rotation by the drive. This enables an automated resetting of the rotary element into a starting position or an automated locking and releasing of a rotary latch of a locking mechanism of the locking system. In one embodiment, an automated rotation of the rotary element by the drive is only possible in one direction of rotation. A rotary latch is then reset and / or locked in place via a force applied by the user and / or a mechanical energy store such as a spring.

A lever can generally be pivoted about a pivot axis in order to transmit a force and / or movement. The lever is pivoted through the ramp in principle through a contact, that is, direct contact, between the lever and the ramp. When the rotary element is rotated by the drive, the lever then slides along the ramp. In the present locking system, the lever can be, for example, a pawl for locking the rotary latch, a blocking lever for holding the pawl in a position that engages the rotary latch, a release lever for releasing the pawl or the blocking lever, or another locking element. A pawl as a lever enables a locking system with particularly few locking components. In combination with an automated drive in both directions of rotation, a rotary latch can be locked and unlocked particularly quickly and reliably. A release lever as a lever enables a particularly energy-efficient release of a locking mechanism, in particular in combination with a blocking lever and / or automated driving of the rotation element in only one direction of rotation.
A ramp is generally an inclined guide or actuation surface. A ramp is not a bevel on an edge, nor is it a manufacturing-related bevel or rounding of a corner. In particular, the ramp is formed by a projection which, for example, is connected or manufactured in one piece with the rotary element. This reduces the number of parts. In one embodiment, the ramp is formed by a separate component that is placed on the disk-shaped Rotary element is provided. This enables the use of different materials for the ramp and the rotary element and a reduction in manufacturing costs. The ramp or the separate component forming the ramp is then connected or coupled to the rotation element in such a way that the ramp can be rotated together with the rotation element. If the ramp is provided by a separate component, there is preferably a connection with the rotation element that is fixed in terms of movement or at least in a rotationally fixed manner. A ramp, which is provided on the disk-shaped rotary element, is located in the axial direction of the rotary element, that is to say in the direction of the axis of rotation. The ramp is therefore arranged on an upper side of the disk-shaped rotary element. The top side refers to a surface of a disk base body on which the ramp is provided. The upper side does not relate to a collar surrounding the disk base body, which is provided, for example, to interact with a drive shaft of the drive and has a greater axial extent than the disk base body.

In one embodiment, the ramp runs obliquely to the axis of rotation and / or drops in the radial direction, based on the axis of rotation, towards the rotation element. The ramp thus essentially has the shape of a jacket surface segment of a frustoconical structure. The lever can thereby be operated with a particularly high degree of efficiency, in particular when the pivot axis of the lever is inclined to the axis of rotation. In particular, the ramp is obliquely shaped in such a way that the lever is displaced away from the rotary element by guiding, sliding and / or dragging along the ramp. The ramp preferably hits an upper side of the disk-shaped rotary element at an angle, which is facing the ramp. In particular, the ramp is located entirely within the circumference of the disk-shaped rotating element on which the ramp is provided. The ramp does not protrude radially beyond the outer circumference of the rotary element at any point.

In one embodiment, the ramp is curved in the circumferential direction about the axis of rotation. A particularly targeted pivoting of the lever as a function of the course of the ramp in the circumferential direction can thus be made possible by rotating the rotation element. In particular, the ramp extends over an angular range of at most 270 °, preferably 235 °, particularly preferably at most 205 °, about the axis of rotation. A particularly fast response time can be achieved in this way.

In one embodiment, an axial upper end of the ramp runs in a spiral around the axis of rotation. By rotating the rotating element, the lever can be pivoted with particularly low friction losses. An axial upper end of the ramp relates to a longitudinal section along the axis of rotation of the rotary element and means the point which is axially furthest away from the upper side of the disk-shaped rotary element. In one embodiment in which the ramp meets the top of the disk-shaped rotating element, the axial extent of the ramp corresponds exactly to the axial distance from the top of the disk-shaped rotating element to the axial upper end of the ramp. This axial distance and / or this axial extent change as a function of the angular position which, together with the axis of rotation, spans the plane of the above-mentioned longitudinal section. The axial upper end of the ramp thus increasingly moves away from the disk-shaped rotary element in the direction of the axis of rotation relative to the lever with a fixed angular position when the rotary element is rotated by the drive, preferably to pivot the lever away from the rotary element.

In one embodiment, the radial extension of the ramp increases when viewed in the circumferential direction. This increases the reliability of the locking system.

In one embodiment, a radial distance from the axis of rotation to the axial upper end of the ramp, viewed in the circumferential direction, increases. The lever can thereby be pivoted particularly far, and this with a particularly high degree of efficiency.

In one embodiment, the ramp contains a concave shape, especially viewed in longitudinal section. A further optimized actuation vector can thus be obtained.

In one embodiment, a projection with a cylinder-like lateral surface is provided, i.e. the lateral surface extends in a curved manner around the axis of rotation and parallel to the axis of rotation. In particular, the projection has a greater axial extent than the ramp. The axial upper end of the ramp can then lie on the cylinder-like lateral surface. The ramp then forms an obtuse angle with the ramp when viewed in a longitudinal section along the axis of rotation. A particularly robust ramp can thus be obtained.

In one embodiment, the lever can be pivoted by the ramp about a pivot axis which is axially spaced from the ramp. The axially spaced pivot axis enables particularly effective pivoting of the lever.

In one embodiment, the pivot axis is inclined to the axis of rotation by an angle difference. In particular, the angle difference is at least 45 ° and / or at most 135 °, particularly preferably exactly 90 °. A compact design in a given installation space can thus be achieved with low energy consumption of the drive at the same time. A minimum energy consumption is possible with an angle difference between 85 ° and 95 °.

In one embodiment, the lever is displaced axially by the ramp when the rotary element is rotated by the drive. A particularly reliable actuation of the lever is thus made possible. Axially displaced means in the direction of the axis of rotation, in particular away from the disk-shaped rotation element.

In one embodiment, the lever is curved, L-shaped, hook-shaped or J-shaped. A particularly high degree of efficiency can thus be achieved when actuating the ramp. In addition, a particularly compact locking system can be provided.

In one embodiment, the lever can grip from below the disk-shaped rotation element over the disk-shaped rotation element and contact the ramp. The lever can therefore encompass an annular collar on the outer circumference of the rotary element, which is in particular axially thicker than the disk base body of the rotary element. The lever can reach over the top of the rotation element up to the radially inner ramp in order to contact the ramp. In particular, the lever is preferably pressed against the ramp by a spring in order to contact the ramp.

In one embodiment, the free end of the lever is rounded. The free end of the lever preferably has an approximately semicircular shape when viewed in cross section through the pivot axis. This can reduce the frictional resistance.

In one embodiment, a free end of the lever slides or grinds relative to the rotating element in a spiral along the ramp when the rotating element is rotated by the drive. An actuation vector adapted to the movement of the lever and the free end with particularly low friction losses can thus be obtained.

In one embodiment, an incline angle of the ramp becomes steadily flatter when the rotary element is rotated by the drive, preferably in a direction of rotation for pivoting the lever away from the axis of rotation and / or for actuating the lever. A particularly high degree of efficiency can be achieved can be achieved during actuation despite the relative movement between the ramp and the lever.

In one embodiment, a radial distance between the axis of rotation and a contact point between the free end of the lever and the ramp becomes steadily larger when the rotary element is rotated by the drive, preferably in a direction of rotation for pivoting the lever away from the axis of rotation and / or towards Operate the lever. A particularly large pivot angle of the actuated lever can be realized in this way.

In one embodiment, the ramp has an incline angle of at least 20 ° and / or at most 80 °, in particular within a surface area over which the free end slides or grinds, the rotary element is rotated by the drive. Frictional losses can be reduced in this way, in particular in combination with a rounded free end of the lever which contacts the ramp with the mentioned slope angles.
In one embodiment, the slope angle of the ramp increases continuously in the circumferential direction along a path that the free end of the lever slides or grinds along the ramp during the rotation of the rotary element, in particular from 20 ° to 80 °. The angle of inclination can thus be adapted to the relative movement and the change in the orientation of the free end to the ramp in the area of the contact point to optimize the efficiency, the relative movement and the change in orientation being caused by pivoting the lever. The slope is measured on a plane that is perpendicular to the axis of rotation. In particular, the slope to the top of the disk-shaped rotation element is measured. Basically, the axis of rotation is oriented perpendicular to the top of the rotation element.

In particular, in this document, the direction of rotation refers to the direction of rotation about the axis of rotation, which leads to a pivoting of the lever away from the axis of rotation and / or to the actuation of the lever. The the opposite direction of rotation is then the reverse direction of rotation. An actuation of the lever preferably triggers the locking mechanism, so that, for example, a door or flap of a motor vehicle can be opened again. A rotation of the rotary element in the reverse direction of rotation serves in one embodiment to return the lever and / or the rotary element to an initial position. Alternatively or additionally, a rotation of the rotary element in the reverse direction of rotation can be used to lock a rotary latch in order to bring a locking mechanism into a closed state, in which, for example, a door or flap of a motor vehicle is securely held in a closed position.

In the following, exemplary embodiments of the invention are also explained in more detail with reference to figures. Features of the exemplary embodiments and further alternative or supplementary configurations described below can be combined with the claimed subject matter individually or in a plurality. The claimed areas of protection are not limited to the exemplary embodiments.

Figur 1:

Isometrische Darstellung eines Antriebs zum Rotieren eines Rotationselements, das sich in einer Ausgangsstellung α₀ befindet und über eine Rampe auf dem Rotationselement einen Hebel verschwenken kann;

Figur 2a:

Schematische Draufsicht auf die Anordnung der Fig. 1 in der Ausgangsstellung α₀;

Figur 2b:

Seitliche Darstellung der Anordnung der Figur 2a;

Figur 3a:

Schematische Draufsicht auf die Anordnung der Fig. 2a während eines Rotierens des Rotationselements, gezeigt in einer ersten Zwischenstellung α_i;

Figur 3b:

Seitliche Darstellung der Anordnung der Figur 3a;

Figur 4a:

Schematische Draufsicht auf die Anordnung der Figur 3a während des Rotierens des Rotationselements, gezeigt in einer zweiten Zwischen stellung α_k;

Figur 4b:

Seitliche Darstellung der Anordnung der Figur 4a.

Show it:

Figure 1:

Isometric representation of a drive for rotating a rotary element, which is in an initial position α ₀ and can pivot a lever on the rotary element via a ramp;

Figure 2a:

Schematic top view of the arrangement of the Fig. 1 in the starting position α ₀ ;

Figure 2b:

Lateral representation of the arrangement of the Figure 2a ;

Figure 3a:

Schematic top view of the arrangement of the Fig. 2a during rotation of the rotary element, shown in a first intermediate position α _i ;

Figure 3b:

Lateral representation of the arrangement of the Figure 3a ;

Figure 4a:

Schematic top view of the arrangement of the Figure 3a while the rotating element is rotating, shown in a second intermediate position α _k ;

Figure 4b:

Lateral representation of the arrangement of the Figure 4a .

The Figure 1 shows a disk-shaped rotary element 1, in particular in the form of a worm wheel. The rotary element 1 has a disk base body 11 and a collar 12 surrounding the disk base body 11. The narrow, annular collar 12 has a greater extent in the axial direction than the disk base body 11 and / or protrudes axially on the circumference of the disk base body 11. This protrusion preferably corresponds to at least twice the thickness of the disk base body 11. A drive 3, in particular an electric motor, is equipped with a drive shaft 11 that can rotate around the axis of rotation 15, which is tangential to the circumference of the rotation element 1 and / or perpendicular to the axis of rotation 4 is oriented. Corresponding tooth profiles 14 on the circumference of the drive shaft 11 and on the outer, radial lateral surface of the collar interlock in order to transmit a rotation and a torque of the drive 3 to the rotary element 1, which is thereby caused to rotate.

A ramp 5 is provided on the preferably flat surface of the disk base body 11 (in Fig. 1 hatched), which extends from the surface inside the circular top in the axial direction to form an inclined formation on the rotary member 1. A cylindrical sleeve 16, which forms part of a bearing of the rotary element 1, and / or a projection 17 with a cylinder-like jacket surface 18 is also provided on this surface of the disk base body 11. In particular, the projection 17 and / or the ramp 5 extends around the sleeve 16. The ramp 5 preferably extends around the projection 17. In particular, the projection 17 protrudes beyond the ramp in the direction of the axis of rotation 4. The ramp 5 preferably forms the projection 17 and / or the sleeve 16, optionally together with the rotational body, is a one-piece or at least one-piece structure, which is in particular frustoconical. The structure has the overall shape of a non-rotationally symmetrical volcanic cone that becomes steeper in the direction of rotation. The ramp rests on the surface of the disk base body 11 and wraps itself spirally around the projection 17, the projection 17 and the ramp having a continuously larger radius and a steadily increasing radial extent in the circumferential direction. An axial upper end 7 of the ramp 5 is at an increasing distance in the circumferential direction from the surface of the disk base body 11 and at the same time from the axis of rotation 4, which creates a spiral shape.

The lever 2 is mounted pivotably about a pivot axis 6 which is oriented perpendicular to the axis of rotation 4 and / or is spaced apart from the axis of rotation 1 by at least half the diameter of the rotary element. The lever 2 has a tubular part 19 for mounting around the pivot axis 6. The pivot axis 6 is arranged below the rotary element 1. The lever 2 extends perpendicular to the tubular part 19 and / or perpendicular to the pivot axis 6 with a hook shape, in particular J-shaped, and can reach from below over the collar 12 to the lower surface of the disk base body 11, around the ramp 5 with the free Contact end of 8. The free end 8 of the lever 2 is preferably thickened in the direction of the pivot axis 6 in order to enable particularly reliable actuation with a particularly high degree of efficiency through the ramp 5. In a starting position α _{0 of} the rotary element 1, the free end 8 lies directly on or almost on the surface of the disk base body 11.

The Figure 2a shows the lever 2 and the rotary element 1 with the ramp 5 present on it in a top view in the starting position α _{0 of} the rotary element 1. In one embodiment, the surface of the disk base body 11 or the ramp 5 in the starting position α _{0 of} the rotary element 1 has an end region of the free end 8, which is closest to the axis of rotation 4 in the direction of the pivot axis 6, contacted. The Figure 2b shows the arrangement of the locking system of Figure 2a in a side view. The free end 8 has the shape of a finger and a rounded, preferably an approximately semicircular end which contacts the ramp 5 or is preferably only spaced from the ramp 5 by a small air gap in order to protect the free end 8 from wear.

The Figures 3a and 3b now show compared to the Figures 2a and 2b pivoting of the lever 2 through the ramp 5, which is contacted at a contact point 9 by the free end 8 of the lever 2 and displaces the lever 2 as a result of the rotation from the starting position α ₀ into the intermediate position α _i shown. The power transmission takes place in the direction of an actuation vector 10. The actuation vector 10 extends approximately along the free end 8 of the lever 2, which indicates a power transmission with a high degree of efficiency and little mechanical losses.

The Figures 4a and 4b now show compared to the Figures 3a and 3b a continuation of the pivoting of the lever 2 through the ramp 5 by the rotation from the intermediate position α _i into the intermediate position α _k . The actuation vector 10, in the direction of which the force from the ramp 5 acts on the free end 8 of the lever 2, becomes steeper when the rotary element 1 is rotated by the drive 3. The actuation vector 10 is perpendicular to a connecting line 20 from the pivot axis 6 of a contact point 9 between the lever 2 and the ramp 5, at which the free end 8 contacts the ramp 5.

By rotating the rotating element 1 in the direction of rotation shown in the figures (clockwise), the lever 2 is actuated, which in turn interacts with a locking mechanism, not shown. The contact points 9 together form a spiral shape around the axis of rotation with an increasing radius.

List of reference symbols:

1

Rotation element

2

lever

3

drive

4th

Axis of rotation

5

ramp

6th

Swivel axis

7th

Axial upper end of the ramp

8th

Free end of the lever

9

Contact point

10

Actuation vector

11

Disc body

12

collar

13

Drive axle

14th

Tooth profile

15th

Axis of rotation

16

Sleeve

17th

head Start

18th

Lateral surface of the projection

19th

Tubular part of the lever

20th

Connecting line

α ₀

Starting position

α _i , α _k

Intermediate positions

Claims (10)

Locking system for a motor vehicle with a disk-shaped rotary element (1), a drive (3) for rotating the rotary element (1) about an axis of rotation (4) and a lever (2) which can be moved by the rotary element (1), characterized that a ramp (5) is provided on the disk-shaped rotary element (1) and the locking system is set up so that the lever (2) can be pivoted through the ramp (5) when the rotary element (1) is driven by the drive (3 ) is rotated. Locking system according to the preceding claim, characterized in that the ramp (5) runs obliquely to the axis of rotation (4) and slopes down in the radial direction towards the rotation element (1). Locking system according to one of the preceding claims, characterized in that the ramp (5) is curved in the circumferential direction around the axis of rotation (4). Locking system according to one of the preceding claims, characterized in that an axial upper end (7) of the ramp (5) runs in a spiral around the axis of rotation (4). Locking system according to the preceding claim, characterized in that viewed in the circumferential direction, a radial distance from the axis of rotation (4) to the axial upper end (7) of the ramp (5) and / or a radial expansion of the ramp (5) increases. Locking system according to one of the preceding claims, characterized in that the ramp (5) has a concave shape. Locking system according to one of the preceding claims, characterized in that the lever (2) can be pivoted by the ramp (5) about a pivot axis (6) which is axially spaced from the ramp (5) and / or the pivot axis (6) ) is inclined to the axis of rotation (4) by an angle difference, in particular by at least 45 ° and / or at most 135 °. Locking system according to one of the preceding claims, characterized in that the lever (2) is L-shaped or J-shaped and / or grip from below the disk-shaped rotation element (1) over the disk-shaped rotation element (1) and the ramp (5) can contact. Locking system according to one of the preceding claims, characterized in that a free end (8) of the lever (2) slides helically along the ramp (5) relative to the rotary element (1) when the rotary element (1) rotates by the drive (3) becomes. Locking system according to the preceding claim, characterized in that a slope angle of the ramp (5) is constantly flat and / or a radial distance between the axis of rotation (4) and a contact point (9) between the free end (8) of the lever (2) and the ramp (5) becomes steadily larger when the rotary element (1) is rotated by the drive (3).

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