Lock catch for motor vehicle door locking system

Abstract

The invention relates to a lock catch (1) for a motor vehicle door locking system, comprising: a lock catch plate (2); the invention relates to a lock catch (1) comprising a lock catch plate (2), a lock catch bow (3) fixed to the lock catch plate (2), the lock catch bow (3) being formed with a lock pin (7), a middle section (9) and a connecting pin (10), and a projection (8) being arranged on the middle section (9) in the direction of the longitudinal axis of the middle section (8), the lock catch (1) being formed in at least two parts.

Description

Technical Field

[0001] The present invention relates to a lock for a motor vehicle door locking system, the lock comprising: a lock plate; a lock bow fixed on the lock plate, wherein the lock bow is constructed with a lock pin, a middle section and a connecting pin, and a protrusion is arranged on the middle section along the longitudinal length direction of the middle section. Background Art

[0002] The striker usually interacts with a locking mechanism of an associated motor vehicle door lock. The striker and the motor vehicle door lock generally define a motor vehicle door locking system. The striker, in conjunction with the locking mechanism in the motor vehicle door lock, ensures that the associated motor vehicle door is securely and reliably locked. For this purpose, the striker is usually attached to the motor vehicle body, for example to the B-pillar or C-pillar of the associated motor vehicle body. In contrast, the motor vehicle door lock is located in the motor vehicle door to be locked. In principle, the arrangement can also be the other way around.

[0003] Due to the primary locking function of the striker in conjunction with the locking mechanism in the motor vehicle door lock, on the one hand, a component is particularly relevant to safety and on the other hand, it is subject to special loads, especially in the event of an accident. In practice, the protection of the vehicle occupants in the event of a side impact is primarily dependent on how reliably the striker and the locking mechanism interacting therewith can withstand the forces. It therefore depends primarily on whether the motor vehicle door remains locked so that the safety devices provided in or on the motor vehicle door, such as side airbags, side impact protection devices, etc., can exert the desired effect.

[0004] The forces to be absorbed by the interaction between the motor vehicle door lock and the lock catch act directly between the locking mechanism contained in the motor vehicle door lock and the locking pin of the lock catch bow that engages with the locking mechanism. In this case, the locking mechanism comprises a locking tongue and at least one locking pawl, wherein, after the locking tongue engages in the locking bow of the lock catch during the locking movement of the door element, the locking pawl locks into the locking tongue and prevents the door element from opening. The locking mechanism can include a pre-locking part and a main locking part, which can be present in the door lock depending on the door element. Depending on the embodiment of the locking mechanism, the corresponding locking position, i.e. the main locking part or the pre-locking part, can be equipped with an opening torque or a locking torque, so that the deadlocking rod can be used to fix the locking position again. In order to be able to withstand the large forces that occur in the event of an accident, the locking mechanism components are at least partially made of metal material, supported in a metal shaft and held on a metal lock plate in the motor vehicle door lock.

[0005] In the prior art, various methods have been used to further develop such locks so that they can withstand greater forces than before in the event of a crash without breaking or generally mechanical damage. In practice, material deformations and breaks are often observed with locks, in particular in the transition from the lock bow to the lock plate.

[0006] In order to increase the forces to be withstood by means of the lock, various methods are known. For example, there are various methods, namely, the lock or its lock bow is provided with different cross-sectional thicknesses, as described in EP 2 031 158 A2, or the length of the lock is predetermined by means of a groove, as disclosed, for example, in DE 10 2010 021677 A1. However, the loads that actually occur in practice and the fractures that are usually associated with the lock in the event of a collision or extreme forces are not fully reflected in this way. Therefore, it has been shown that the connection between the lock bow and the lock plate is particularly important.

[0007] DE 10 2014 006 857 A1 discloses a lock for a motor vehicle door locking system, which has a lock plate and a lock bow fixed thereon, wherein the lock bow is configured with a lock pin, a middle section and a connecting pin. In order to strengthen the connection between the lock bow and the lock plate, the document proposes that the lock bow is connected to the lock plate in a form-fitting manner via at least one material thickened area. In order to achieve a form-fitting connection, the lock bow or the portion of the lock pin and / or the connecting pin that protrudes from the lock plate is upset. By means of the upset forging process, the lock plate is simultaneously provided with a bulge, which ensures that the upset cover formed on the bottom side of the lock plate based on the upset forging process can be spaced apart from the lock pin on the one hand and the connecting pin on the other hand relative to the vehicle body.

[0008] The solutions known from the prior art have in principle already proven to have reached their limits in newer developments in the vehicle industry. The use of batteries in hybrid vehicles or electric vehicles increases the loads that occur in the event of an accident. The batteries present in the motor vehicle increase the total weight of the motor vehicle by several times, so that the loads on the locking mechanism and the lock catch that occur in an accident are also increased. Therefore, it is necessary to find ways to increase the durability of the lock catch. The present invention is proposed on this basis. Summary of the invention

[0009] The object of the present invention is to provide an improved lock catch for a motor vehicle door locking system. The object of the present invention is in particular to improve the load capacity of the lock catch and to increase the breaking strength of the system comprising lock and lock catch.

[0010] This object is achieved according to the invention by the features of independent claim 1. Advantageous embodiments of the invention are given in the dependent claims. However, it should be pointed out that the embodiments described below are not restrictive, but rather any possible variations of the features described in the description and the dependent claims are possible.

[0011] According to claim 1, the object of the present invention is achieved by providing a lock for a motor vehicle door locking system, the lock having: a lock plate; a lock bow fixed to the lock plate, wherein the lock bow is constructed with a locking pin, a middle section and a connecting pin, and a projection is arranged on the middle section in the direction of the longitudinal axis of the middle section, wherein the lock is constructed in at least two parts. Now, the following feasibility is achieved by the design of the lock according to the invention, so that the lock bow is individually adapted to the loads in the event of an accident, in particular extreme loads. The individual loads in the event of an accident are particularly relevant to safety, because in particular in the event of an accident it must be ensured that the door, hatch or hood remains locked. This is particularly important for side doors, because the vehicle occupants must be protected. Only in combination with the safe locking of the door can other safety systems, such as seat belts and airbags, play their full role.

[0012] The loads in the event of a crash are very high and are simulated by tensile tests when designing the lock. In this case, the lock is loaded until it breaks in a tensile test in order to determine whether the predefined specifications have been achieved and to indicate weak points, thereby enabling a unique design of the lock. In particular, the present invention is proposed on this basis and provides a possible solution for improving the load capacity of the lock. In this case, a projection in the direction of the longitudinal axis of the middle section allows the bolt to be supported in the locking mechanism, wherein the two-part design allows for cost-effective production.

[0013] As mentioned above, the latch according to the invention not only relates to side doors, but can also be used in the area of ​​hoods, tailgates, sliding doors, covers, foldable bench seats, etc., and can be used at any location where a component that is pivotably or movably applied to the motor vehicle must remain fixed in its position.

[0014] In principle, the lock has a locking plate which is designed as a base for the locking bow and preferably has at least two through-holes by means of which the lock can be fixed to the motor vehicle or to a movable component. Preferably, the opening in the locking plate has a conical depression, so that a flat surface can be achieved with the locking plate by means of suitable screws with a conical head. In this case, the locking plate can additionally have a bend, so that the rivet head of the locking bow can be received in the bend, so that at least a partial area of ​​the locking plate can be fixed flat to the vehicle body. In this case, the bend receives the corresponding rivet head of the locking bow.

[0015] Preferably, the lock bow can be fixed to the lock plate as a separate component, in particular in a non-detachable manner. By means of a two-piece structure, in particular the separation between the lock bow and the lock plate, a unique matching of the loads can be set. A simple structural form can be achieved, because the lock plates are each individually manufactured and can be designed, for example, as punched and bent parts, which can be particularly advantageous for mass production. The lock bow can be fixed to the lock plate, wherein advantageous manufacturing can also be achieved here. The design of the lock bow with a protrusion in the direction of the longitudinal axis of the middle section can achieve an extended engagement surface between the lock bow and the lock tongue engaged with the lock bow. The lock tongue engages in the lock pin and rotates around the lock pin when the locking mechanism is locked. Finally, in the main locking position, the lock tongue rests on the lock pin.

[0016] If, in the event of an accident, the engagement relationship between the bolt and the lock catch changes, the bolt engages with the middle section, because the bolt is displaced over the lock pin toward the middle section. Now, through the projection on the middle section, not only the part of the bolt that grabs the lock pin, i.e. the load arm of the bolt, but also the part of the bolt arranged in front of the lock pin, i.e. the catch arm of the bolt, engages with the middle section. As a result, the bolt supports both sides of the lock pin in the direction of the middle section on the one hand and in the direction of the projection on the other hand. As a result, an expanded support can be achieved overall when the bolt and the lock catch interact. This increases the load capacity of the door locking system.

[0017] The locking pin is preferably rectangular, i.e., fixed to the locking plate in the direction of the normal relative to the locking plate. Starting from the locking bow, the middle section extends substantially parallel to the locking plate, thereby realizing a joining area for the locking tongue to the locking pin. A connecting pin is connected to the middle section, which in turn extends from the middle section to the locking plate. The connecting pin can be designed straight or at least partially curved. However, it is also conceivable that the connecting pin forms a slope starting from the middle section in the direction of the locking plate.

[0018] Advantageously, in another embodiment variant of the present invention, the lock bow has a mounting tab, in particular a mounting tab arranged parallel to the middle section. The mounting tab extends along the lock plate and abuts against the lock plate. Therefore, as in the preferred embodiment of the lock plate, the mounting tab has a flat extension in the area of ​​the abutment surface relative to the lock plate. The lock bow can be connected to the lock plate by means of the mounting tab. The mounting tab extends parallel to the middle section, thereby forming an opening (which can be described as a substantially rectangular opening) in the lock bow. Depending on the design of the connecting pin, for example, when the connecting pin is constructed obliquely or has an S shape, an alternative opening shape can be formed. Preferably, the middle section and the mounting tab have the same cross-section. This has been proven to be particularly advantageous, especially with respect to load capacity. Resistance is increased relative to bending stress by using the mounting tab. Bending stress can act on the lock pin in particular in the longitudinal direction of the vehicle or in the longitudinal extension direction. Usually, the coordinate system for the design structure is stored in the motor vehicle. Here, the y-axis forms the longitudinal direction of the vehicle, the x-axis forms the transverse direction of the vehicle, and the z-axis forms a vertical line relative to the motor vehicle or the chassis of the motor vehicle. Thus, bending stresses can be increased in particular in the y-direction and the z-direction.

[0019] It can also be advantageous if the mounting tab is configured with a mounting element. In this case, at least one extension can be molded onto the latch bow, which in this case passes through an opening in the latch plate and can be connected to the latch plate in a non-detachable manner, for example, by means of a modification. Preferably, two extensions are molded onto the latch bow, which can be connected to the latch plate by means of a modification, i.e. riveting. It is also conceivable to mold three extensions onto the latch bow, wherein according to the invention it is also conceivable, for example, that one extension serves as a mounting auxiliary component, for example, for inserting the latch bow into the latch plate. Preferably, the extension or extension on the latch bow is cylindrically configured, wherein the extension can be inserted into a perforation of the latch plate.

[0020] The buckle bow has a contour which can be described as essentially rectangular. Here, the middle section, the connecting pin and the mounting tab can have a quadrilateral shape, while the locking pin has a circular cross-sectional shape. The locking pin has a circular shape because the locking pin engages with the locking tongue by the rotation of the locking tongue. Conversely, the projection, the middle section, the connecting pin and the mounting tab have a quadrilateral shape, which has proven to be particularly advantageous with regard to the bending stresses of the buckle.

[0021] Advantageously, the projection forms a contact surface for the locking tongue. The projection extends from the middle section via the locking pin, wherein the projection has a cross-sectional shape corresponding to the middle section. Here, the projection forms a contact surface for the locking tongue. The projection protrudes so far from the locking pin that the projection engages with the capture arm of the locking tongue. Preferably, the projection partially extends over the capture arm. Therefore, the locking tongue can additionally contact the projection in the case of extreme loads, i.e., accidents. This is particularly advantageous in particular with respect to the transverse direction of the vehicle, because the locking tongue not only contacts the middle section via the load arm, but also contacts the projection with the help of the capture arm. Therefore, the locking pin is partially surrounded in the circumferential direction, i.e. at an angle greater than 180°, preferably up to 270°, so that in addition to the middle section, a projection is also provided as a contact surface for the locking tongue.

[0022] The projection and the middle section form a common contact surface for the locking tongue. For this purpose, the middle section and the projection can advantageously be arranged on a common plane, at least relative to the contact surface for the locking tongue. Thus, the middle section and the projection form a common contact surface for the locking tongue. Here, the middle section and the projection also extend laterally beyond the locking pin, so that abutment against the locking tongue in the circumferential direction can also be achieved. The middle section and the projection can provide a load surface, which can be flat against the locking tongue in the case of extreme loads, so that the load capacity of the motor vehicle door locking system can be significantly increased.

[0023] It can also be advantageous if the locking bow is designed in one piece. The one-piece design of the locking bow offers the advantage that an increased load capacity can be achieved in the locking bow. In particular, no stress peaks occur in the transition area between different areas of the locking bow, since the one-piece design has an optimal force path. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is described in detail below according to a preferred embodiment with reference to the accompanying drawings. However, the following principle applies, namely, the embodiment does not limit the present invention, but only shows an advantageous design form of the present invention. The features shown can be implemented alone or in combination with other features of the description and the claims.

[0025] The figure shows:

[0026] Figure 1 A side view showing a lock catch interacting with a bolt and a lock box constructed in accordance with the present invention,

[0027] Figure 2 Show according to Figure 1 The lock in the event of an external force, such as an accident, and

[0028] Figure 3 from Figure 1The direction of arrow III in FIG. 1 shows a top view of the lock buckle according to the present invention. DETAILED DESCRIPTION

[0029] exist Figure 1 A side view of a lock 1 constructed according to the invention is shown in FIG. The lock 1 has a lock plate 2 and a lock bow 3. The lock 1 interacts with a lock tongue 4 and a lock box 5. Figure 1 , the main locking position, i.e. the locked position of the motor vehicle lock, is shown in FIG. 5 , in which the locking tongue 4 extends around the lock catch, wherein the locking tongue 4 is received in the lock housing 5 in a manner rotatable about an axis 6. It should be noted here that the axis 6 is only shown in principle, wherein the axis 6 is typically arranged in the locked state of the locking tongue 4 as in FIG. Figure 3 Arrange as shown in .

[0030] In the embodiment shown, the locking hook 3 is designed in one piece and has a locking pin 7, a projection 8, a middle section 9, a connecting pin 10 and a middle web 11. The side view of the locking hook is essentially rectangular, wherein the rectangle is only abstracted due to the inclination of the connecting pin 10. The projection 8 extends from the middle section 9 via the locking pin 7, so that the projection 8 can pass over the locking pin 7. The locking hook 3 is essentially quadrilateral, and only the locking pin 7 has a cylindrical shape.

[0031] The lock tongue 4 surrounds the locking pin 7 in the circumferential direction, so that the locking pin 7 partially abuts against the lock tongue in the circumferential direction. It can be clearly seen that a flat abutment surface 12 for the lock tongue 4 can be realized by the projection 8 and the middle section 9. Here, the projection 8 partially protrudes beyond the lock tongue, in particular the catch arm 13 of the lock tongue 4. The projection 8 can protrude beyond the catch arm 13, for example, by 15 mm, preferably by 10 mm, and more preferably by 8 mm.

[0032] exist Figure 1 In the middle, in particular in the middle section 9 of the catch bow 3 , an embossing 14 can be seen, which additionally stabilizes the catch bow 3 . The embossing 14 extends substantially over the opening 15 formed by the catch bow 3 .

[0033] The mounting tab 11 lies flush against the surface 16 of the strike plate 2. As can be clearly seen, the mounting tab 11 and the middle section 9 are arranged parallel to each other, and the bolt 4 and the lock box 5 are arranged parallel to the middle section 9, the mounting tab 11 and the strike plate 2. The lock box 5 is usually manufactured as a sheet metal stamping and carries a locking mechanism including the bolt 4 and the pawl 17. The locking mechanism 18 including the bolt 4 and the pawl 17 and the lock box 5 are components of a motor vehicle door lock. The striker 1 is usually fixed to the body of a motor vehicle, wherein the motor vehicle lock is arranged in a movable component of the motor vehicle.

[0034] Now in Figure 2, the position of the lock buckle 1 which occurs when a large force F acts on the motor vehicle with a pressure peak, such as occurs in the event of an accident, is shown. The lock buckle 1 is loaded with a force in the direction of the arrow F, whereby the locking tongue 4 comes into contact with the contact surface 12. The locking tongue itself therefore rests with its load arm 19 on the contact surface 12 and with the catch arm 13 on the projection 8. Here, the projection 8 and the middle section 9 form a common flat contact surface 12 for the locking tongue 4. By extending the projection 8 over the catch arm 13, a common contact surface for the locking tongue, in particular a circumferential contact surface for the locking tongue 4, is achieved. The load capacity of the lock buckle 1 is thereby increased, which is in turn advantageous for the increased requirements on the components, namely the locking mechanism 18 and the lock buckle 1.

[0035] exist Figure 3 1 shows a view of the lock 1 according to the invention from the direction of arrow III. The locking mechanism 18 is shown in the main locking position, that is, the locking tongue 4 is locked in the locking position by means of the locking pawl 17, which corresponds to an exemplary completely locked door or tailgate. The locking tongue 4 and the locking pawl 17 can be pivoted about their axes 6, 20 respectively, so that they can respectively adopt a locking position, that is, a pre-locking position and a main locking position.

[0036] 4, the projection 8 projects beyond the catch arm 13, so that in the event of increased load and corresponding deformation of the motor vehicle, the projection 8 and the middle section 9 come into contact with the locking tongue. This allows the load to be significantly increased.

[0037] List of reference numerals:

[0038] 1 Lock

[0039] 2 Locking plate

[0040] 3 Locking bow

[0041] 4. Lock tongue

[0042] 5 Lock Box

[0043] 6.20 axis

[0044] 7 Lock pin

[0045] 8 Protrusion

[0046] 9 Middle

[0047] 10 Connecting pins

[0048] 11 Install the splice

[0049] 12. Adhesion surface

[0050] 13 Capture Arm

[0051] 14 Molding Department

[0052] 15 Opening

[0053] 16 Surface

[0054] 17 Locking claw

[0055] 18 Locking mechanism

[0056] 19 Loading arm

[0057] F-Force

Claims

1. A lock catch (1) for a motor vehicle door locking system, the lock catch comprising: a lock catch plate (2); a lock catch bow (3) fixed to the lock catch plate (2), wherein: The lock bow (3) is constructed with a lock pin (7), a middle section (9) and a connecting pin (10), and a protrusion (8) is arranged on the middle section (9) along the longitudinal axis of the middle section (8). It is characterized in that The locking clasp is constructed in at least two parts.

2. The lock buckle (1) according to claim 1, characterized in that: The locking bow (3) can be fixed to the locking plate (2), in particular in a non-detachable manner.

3. The lock buckle (1) according to claim 1 or 2, characterized in that: The locking hook (3) has a mounting lug (11), in particular a mounting lug (11) arranged parallel to the middle section (9).

4. The lock buckle (1) according to any one of claims 1 to 3, characterized in that: The mounting tab (11) has a flat abutment surface corresponding to the locking plate (2).

5. The lock buckle (1) according to any one of claims 1 to 4, characterized in that: The mounting web has at least one mounting element, in particular a mounting element which is integrally formed onto the mounting web (11).

6. The lock buckle (1) according to any one of claims 1 to 5, characterized in that: The projection (8) forms a contact surface (12) for the locking tongue (4).

7. The lock buckle (1) according to any one of claims 1 to 6, characterized in that: The protrusion (8) and the middle section (9) form a contact surface (12) for the locking tongue (4).

8. The lock buckle (1) according to any one of claims 1 to 7, characterized in that: The projection (8) and the middle section (9) form a flat contact surface (12) for the locking tongue (4).

9. The lock buckle (1) according to any one of claims 1 to 8, characterized in that: The locking hook (3) is constructed in one piece.

10. The lock buckle (1) according to any one of claims 1 to 9, characterized in that: The locking pin (7) has a cylindrical cross-sectional shape, and the middle section (9), the connecting pin (10) and the mounting tab (11) have a quadrilateral cross-sectional shape.

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