Tear-tab device

Abstract

The invention relates to a tear-tab device (10a; 10b; 10c), in particular a bending tear-tab device, in particular for a steering column (12a) of a vehicle (14a), comprising at least one first tab element (16a; 16b; 16c), in particular for connection to a first steering-column component (18a), and comprising a second tab element (20a; 20b; 20c) which is integrally connected to the first tab element (16a; 16b; 16c), in particular for connection to a second steering-column component (22a), wherein the first tab element (16a; 16b; 16c) has at least one first, permanent connection edge (24a) to the second tab element (20a; 20b; 20c), and at least one second connection edge (26a; 26b; 26c; 26'a), which forms a predetermined tear edge, to the second tab element (20a; 20b; 20c), which second connection edge is intended in particular to tear in a defined manner in the event of a crash. According to the invention, the first tab element (16a; 16b; 16c) has a first main plane of extent (28a), and the second tab element (20a; 20b; 20c) has a second main plane of extent (30a) which differs from the first main plane of extent (28a).

Description

[0001] Tear tab device

[0002] State of the art

[0003] The invention relates to a tear-off tab device.

[0004] A tear-away device, in particular a bending tear-away device, especially for a steering column of a vehicle, has already been proposed, comprising at least one first tab element, in particular for a connection with a first steering column component, and a second tab element integrally connected with the first tab element, in particular for a connection with a second steering column component, wherein the first tab element has at least one first permanent connecting edge to the second tab element and at least one second connecting edge to the second tab element forming a predetermined tear edge, which is in particular intended to tear in a defined manner in a crash scenario.

[0005] The object of the invention is, in particular, to provide a generic device with improved properties with regard to reliability and manufacturability. This object is achieved according to the invention by the features of claim 1, while advantageous embodiments and further developments of the invention can be found in the dependent claims.

[0006] Advantages of the invention

[0007] The invention relates to a tear-off tab device, in particular a bending tear-off tab device, especially for a steering column of a vehicle, with at least one first tab element, in particular for a connection with a first steering column component, and with a second tab element integrally connected with the first tab element, in particular for a connection with a second steering column component, wherein the first tab element has at least one first, permanent connecting edge to the second tab element and at least one second connecting edge to the second tab element forming a predetermined tear edge, which is in particular intended to tear in a defined manner in a crash.

[0008] It is proposed that the first tab element has a first principal extension plane and the second tab element has a second principal extension plane that differs from the first principal extension plane. Preferably, the first principal extension plane and the second principal extension plane are aligned parallel to each other or tilted relative to each other. Preferably, the first principal extension plane and the second principal extension plane are aligned at least substantially parallel to each other. Preferably, the first principal extension plane and the second principal extension plane are spaced apart from each other in a region of the tab elements. Preferably, the first tab element has a U-shaped base, with the second tab element arranged between the two legs of the first tab element.Preferably, the two legs of the first tab element are connected to the second tab element via predetermined breaking edges, while one base side of the first tab element is connected to the second tab element via a permanent connecting edge. The second tab element is therefore, in particular, connected to the first tab element via two predetermined breaking edges and a permanent connecting edge.

[0009] In this context, a "tear tab device" is understood to mean, in particular, a device designed to connect at least two components. Preferably, the tear tab device is designed to deform plastically and / or tear upon a defined event, especially upon application of a defined force, thereby allowing movement of the components. Preferably, the tear tab device is designed to connect two steering column components and, in the event of a crash, to allow defined movement of the steering column components relative to each other. Preferably, the tear tab device is designed to tear in a defined manner upon application of a defined force and to absorb energy. Preferably, the tear tab device is formed by a bending tear tab element, in particular a bending tear tab.Preferably, the bending tear-off device comprises a tab element, in particular a second tab element, which is bent at its free end, the bent end being coupled to a second steering column component. Preferably, some of the energy, particularly during a crash, is absorbed during the bending, in particular the deformation, of the second tab element. The relative movement between the bent end of the second tab element and the first tab element causes deformation, thereby absorbing some of the transferred energy. Furthermore, in an initial state, the second tab element is at least partially connected to the first tab element at its edges, so that during any relative movement of the steering column components, the second tab element must be torn away from the first tab element, thus absorbing a further portion of the energy through this tearing.The bending rip device is a particularly safety-relevant component that guarantees defined crash behavior. In the event of an accident and the resulting impact of a driver on the steering wheel, the forces occurring are preferably absorbed by the breaking of the bending rip device in correlation with the active retraction of the steering column.

[0010] In this context, a "tab element" is understood to be a flat, particularly elongated, element designed to be connected, especially directly, to another component, for example, via a screw or rivet connection. Preferably, the tab elements are each made of a metal, particularly steel. However, other materials that would be suitable to a person skilled in the art are also conceivable. Preferably, the tab elements are each made of a sheet metal part, particularly by stamping. Preferably, the first tab element and the second tab element are joined to each other integrally, particularly in one piece.The term "one-piece" is to be understood in particular as being joined by at least a material bond, for example by a welding process, an adhesive bonding process, an injection molding process, and / or another process that would appear appropriate to a person skilled in the art, and / or advantageously as being formed in one piece, such as by production from a single casting and / or by production using a single- or multi-component injection molding process, and advantageously from a single blank. Advantageously, "one-piece" is also to be understood as being formed in one piece. Preferably, this single piece is produced from a single blank, a compound, and / or a casting, particularly preferably using an injection molding process, especially a single- and / or multi-component injection molding process.

[0011] The term "principal extension plane" of a structural unit is understood to mean, in particular, a plane that is parallel to a largest side face of the smallest imaginary cuboid that just completely encloses the structural unit, and in particular passes through the center of the cuboid. "Substantially parallel" here is understood to mean, in particular, an alignment of a direction relative to a reference direction, especially in a plane, wherein the direction has a deviation from the reference direction of, in particular, less than 8°, advantageously less than 5°, and most advantageously less than 2°.

[0012] The term "intended" should be understood to mean specifically programmed, designed, and / or equipped. The fact that an object is intended for a specific function should be understood to mean, in particular, that the object fulfills and / or executes this specific function in at least one application and / or operating state.

[0013] The inventive design of the tear-off tab device enables, in particular, a defined tearing action. Specifically, a defined force-displacement curve can be defined for the tear-off tab device. Very low tearing forces can also be achieved. Furthermore, the need for relief cuts in the tear-off tab device can be eliminated. This allows for a significantly reduced manufacturing effort for the punches.

[0014] Furthermore, it is proposed that the second principal extension plane be arranged parallel to and spaced apart from the first principal extension plane. Preferably, the distance between the second principal extension plane and the first principal extension plane is less than the material thickness of the second tab element. Preferably, the second tab element is offset from the first tab element, at least in sections, such that the tab elements remain connected in that section, but a defined breaking point can be formed. Preferably, the first and second tab elements have the same material thickness. This allows, in particular, a controlled breaking force to be set, preferably depending on an offset. A defined force-displacement curve of the breaking tab device can be defined. Very low breaking forces can also be achieved.

[0015] Furthermore, it is proposed that the second tab element is at least partially sheared relative to the first tab element. Preferably, the second tab element is arranged at least partially offset relative to the first tab element by shearing and / or deep drawing. Preferably, the first and second tab elements remain connected, with a central plane of the second tab element being deflected relative to the first tab element. It is further proposed that the second tab element is arranged partially offset relative to the first tab element by shearing. Preferably, the second tab element is arranged partially offset relative to the first tab element by deep drawing. This allows, in particular, a tearing force to be set in a targeted manner, preferably depending on an offset.Preferably, the tear-off tab device is designed to tear at the tear edge between the first tab element and the second tab element. Furthermore, this allows for a more reliable production process. Additionally, a force-displacement diagram can be advantageously designed to be linear. In particular, unwanted peaks can be avoided. Moreover, implementation is also feasible, especially in the thin sheet metal sector. Furthermore, minimal setup work is advantageously possible for coil or...

[0016] Batch changes will be made possible.

[0017] It is further proposed that the second tab element be sheared to varying depths along a longitudinal path. Preferably, the longitudinal direction of the tear-off tab device corresponds to a principal extension direction of the tear-off tab device. Preferably, the second tab element is sheared to varying depths along a path parallel to the tear edges. The shear depth is defined, in particular, by the smallest distance, measured perpendicular to the first principal extension plane, between a top surface of the first tab element and a top surface of the second tab element. The top surface of the first tab element and the top surface of the second tab element are, in particular, formed by a principal surface of the respective tab element.The phrase "the second tab element is sheared to varying depths along a longitudinal direction" should be understood in this context to mean, in particular, that the second tab element has different shear depths along the longitudinal direction. The shear depth changes continuously. Preferably, the shear depth at each point along the longitudinal direction is less than the material thickness of the first or second tab element. The "principal extension direction" of an object should be understood to mean, in particular, a direction that runs parallel to the longest edge of the smallest geometric cuboid that just completely encloses the object. It is further proposed that the second tab element has a defined force-displacement tear profile, where a tear force at a point is defined by a shear depth at that point.Preferably, a tool, in particular a press die, for producing the shearing has different heights, which in turn create different shearing depths. This allows, in particular, the definition of a specific force-displacement curve for the tear-off tab device. Different tearing forces can be defined over a specific curve. Furthermore, very low tearing forces can also be achieved.

[0018] It is further proposed that the second connecting edge be formed by a shearing edge. The tearing edge is also formed by a shearing edge. Preferably, the tearing tab device has two shearing edges running parallel to each other, each with the same shearing depth along the longitudinal direction. Preferably, the shearing edges are arranged on opposite sides of the second tab element. Preferably, the first tab element has a U-shaped base, with the second tab element arranged between the two legs of the first tab element. Preferably, the two legs of the first tab element are connected to the second tab element via the two shearing edges, while one base side of the first tab element is connected to the second tab element via a permanent connecting edge.The second tab element is connected to the first tab element, particularly via the two shear edges and the permanent connecting edge. This allows for a particularly reliable tearing edge. In contrast to an embossed tearing edge, this method provides a tearing edge with homogeneous material properties. Unlike embossing, the material structure remains in its original state and does not harden.

[0019] Furthermore, it is proposed that the second tab element has a top and a bottom surface, wherein a maximum transverse extent of the top surface, which extends at least substantially perpendicular to a longitudinal direction of the tear-off tab device, is at least substantially equal to a maximum transverse extent of the bottom surface, which extends at least substantially parallel to the maximum transverse extent of the top surface. Preferably, the top surface and the bottom surface each form one of the two largest outer surfaces of the second tab element. Preferably, the maximum transverse extent of the top surface and the maximum transverse extent of the bottom surface are greater than a maximum thickness of the second tab element, which extends at least substantially perpendicular to the principal plane of extension of the second tab element.Preferably, the upper surface is designed to be positioned on a side facing away from the steering column when the tear-off device is mounted on the steering column. Preferably, the lower surface is designed to be positioned on a side facing the steering column when the tear-off device is mounted on the steering column. Preferably, a principal extension plane of the upper surface is aligned at least substantially parallel to a principal extension plane of the lower surface. In this context, "at least substantially equal" extensions are understood to mean, in particular, that one of the extensions deviates from the other by less than 5%, preferably less than 3%, and most preferably less than 1%.Preferably, the principal extension plane of the top surface and the principal extension plane of the bottom surface extend at least substantially parallel to the principal extension plane of the first tab element. Preferably, the maximum transverse extension of the top surface and the maximum transverse extension of the bottom surface are aligned at least substantially parallel to the principal extension plane of the second tab element. Preferably, the second tab element is deflected at least substantially perpendicular to the principal extension plane of the second tab element relative to the first tab element by a shear depth of at least 30% to a maximum of 50% of the thickness of the first tab element, which in particular extends at least substantially perpendicular to the principal extension plane of the first tab element. Preferably, the second connecting edge is formed by a first shear edge and a second shear edge.Preferably, the first shear edge and the second shear edge are each designed as connecting surfaces that link the first tab element to the second tab element. Preferably, a principal extension plane of the first shear edge and a principal extension plane of the second shear edge are oriented at least substantially perpendicular to the principal extension plane of the first tab element and at least substantially parallel to the principal extension direction of the tear-off tab device. Preferably, the first shear edge and the second shear edge are designed as steps. Preferably, the first shear edge and the second shear edge each define at least one tear-off edge. Preferably, the tear-off edge, in a state of tear-off of the second tab element from the first tab element, extends at least substantially perpendicular to the principal extension plane of the first tab element.Preferably, the first shear edge is divided into a first section on the upper side and a second section on the lower side. Preferably, the second shear edge is also divided into a first section on the upper side and a second section on the lower side. Preferably, in a state of separation of the second tab element from the first tab element, the tear-off edge extends from the first section of the first shear edge to the second section of the first shear edge and from the first section of the second shear edge to the second section of the second shear edge. The design according to the invention allows for particularly advantageous properties with regard to a defined tearing behavior of the tear-off tab device. In particular, a defined force-displacement curve of the tear-off tab device can be realized, thereby enabling controlled release under predetermined loads.

[0020] It is further proposed that the second tab element has a top and a bottom, wherein one maximum transverse extent of the top, in particular the one mentioned above, which runs at least substantially perpendicular to a longitudinal direction of the tear-off tab device, is greater than one maximum transverse extent of the bottom, in particular the one mentioned above, which runs at least substantially parallel to the maximum transverse extent of the top. Preferably, the difference between the maximum transverse extent of the top and the maximum transverse extent of the bottom is at most 15 mm, more preferably at most 10 mm, and most preferably at most 5 mm. Preferably, the maximum transverse extent of the top is extended on both sides relative to the maximum transverse extent of the bottom.Preferably, the respective centers of the maximum transverse extent of the top surface and the maximum transverse extent of the bottom surface are arranged in a common plane that is at least substantially perpendicular to the principal extension plane of the second tab element and in which a principal extension direction of the second tab element lies. Preferably, the maximum transverse extent of the top surface and the maximum transverse extent of the bottom surface are each centered on the principal extension direction of the tear-off tab device. Preferably, the second tab element is deflected relative to the first tab element by a shear depth of at least 70% to a maximum of 90% of the thickness of the first tab element. Preferably, the shear depth extends at least substantially perpendicular to the principal extension plane of the first tab element.Preferably, the second connecting edge has a first shearing edge, in particular the one already mentioned, which is divided into a first section on the top and a second section on the bottom, and a second shearing edge, which is divided into a first section on the top and a second section on the bottom. Preferably, the principal extension planes of the first section of the first shearing edge, the second section of the first shearing edge, the first section of the second shearing edge, and the second section of the second shearing edge are aligned at least substantially perpendicular to the principal extension plane of the first tab element and at least substantially parallel to the principal extension direction of the tear-off tab device.Preferably, the first section of the first shear edge is arranged at least substantially parallel to the maximum transverse extent of the top surface and spaced apart from the second section of the first shear edge. Preferably, the first section of the second shear edge is arranged at least substantially parallel to the maximum transverse extent of the top surface and spaced apart from the second section of the second shear edge. Preferably, the difference between the maximum transverse extent of the top surface and the maximum transverse extent of the bottom surface defines at least one shear edge on the first shear edge and on the second shear edge. Preferably, the shear edge is adjustable by a shear depth. Preferably, the shear edge is adjusted by the difference between the maximum shear depth and the maximum diameter, at least substantially perpendicular to a principal plane of extension of the first tab element.Preferably, a first shear edge is formed in a cross-sectional plane extending at least substantially parallel to the main extension plane of the second tab element, between the first section of the first shear edge and the second section of the first shear edge. Preferably, a second shear edge is formed in a cross-sectional plane extending at least substantially parallel to the main extension plane of the second tab element, between the first section of the second shear edge and the second section of the second shear edge. The design according to the invention allows for particularly advantageous properties with regard to an increased shear depth.Particularly advantageous properties can be provided with regard to avoiding a fracture zone in the tear-off tab device, thereby achieving, in particular, an increased shearing depth and improved adjustability of the force-displacement requirement. Specifically, a greater positioning depth of the second tab element relative to the first tab element can be realized, thus enabling the use of thinner tab elements.

[0021] Furthermore, it is proposed that the connecting edge in at least one cross-sectional plane, extending at least substantially perpendicular to a longitudinal direction of the tear-off tab device, be formed with at least one radius and / or chamfer. Preferably, the first section of the first shear edge and the first section of the second shear edge in the at least one cross-sectional plane are formed with a radius. Preferably, the radius of the first section of the first shear edge and the radius of the first section of the second shear edge in the at least one cross-sectional plane are identical. Preferably, the radius of the first section of the first shear edge is mirror-symmetrical in the cross-sectional plane along the principal extension direction of the tear-off tab device. Preferably, the radius has a radius that is less than or equal to the maximum thickness of the second tab element.Preferably, the connecting edge along a main extension direction of the tear-off tab device is formed section by section as a rounded edge and / or chamfer. Preferably, the second tab element along a main extension direction of the tear-off tab device has sections that are free of a connecting edge formed as a rounded edge and / or chamfer. Preferably, the connecting edge in the sections without a rounded edge and / or chamfer is formed as a step. The design according to the invention allows for particularly advantageous properties with regard to an increased shear depth. Particularly advantageous properties with regard to a defined force-displacement behavior of the tear-off tab device can be achieved.

[0022] Furthermore, it is proposed that the second tab element has a top and a bottom surface, wherein the transverse extent of the top surface varies along a principal direction of extension of the tear-off tab device. Preferably, the second tab element exhibits a widening of the transverse extent of the top surface along the principal direction of extension of the tear-off tab device. Preferably, the transverse extent of the top surface is differentiated in several successive segments along the principal direction of extension. Alternatively, it is conceivable that the second tab element exhibits a tapering of the transverse extent of the top surface along the principal direction of extension of the tear-off tab device. Preferably, the transverse extent of the second tab element is specifically adjusted by the rounding and / or chamfering of the connecting edge.Preferably, the variation in the transverse extent of the upper surface at the first shear edge and at the second shear edge is mirror-symmetrical to a plane in which the principal extension direction of the tear-off tab device lies and which runs at least substantially perpendicular to the principal extension plane of the second tab element. Preferably, the widening or narrowing of the transverse extent of the upper surface is formed via a continuous, in particular rounded, transition. Alternatively, the transverse extent along the principal extension direction can be designed asymmetrically to generate a controlled deflection upon unilateral force application.Preferably, the second tab element has a substantially constant thickness along the main extension direction of the tear-off tab device, extending at least substantially perpendicular to the main extension plane of the second tab element, in order to enable a uniform load distribution when forces are applied. The design according to the invention allows for particularly advantageous properties with regard to design freedom concerning the shape of the force-displacement curve, thereby enabling the tearing behavior to be individually adapted to application-specific requirements.

[0023] Furthermore, it is proposed that the tear-off tab device includes a bending tab which is integrally connected to a free end of the second tab element and is bent, in particular by at least approximately 180°. Preferably, the bending tab is arranged as an extension of the second tab element. Preferably, the bending tab forms part of the second tab element. The bending tab forms, in particular, an arc and is, in particular, directly connected to the second steering column component. The second steering column component is, in particular, coupled to a steering wheel. The second steering column component is, in particular, designed to move relative to a vehicle body in the event of a crash. The bending tab is, in particular, designed to bend in the event of a crash and thereby absorb energy. This allows, in particular, the advantageous provision of a bending tear-off tab.Energy absorption can be achieved in various ways.

[0024] Furthermore, the invention relates to a steering column comprising a first steering column component, a second steering column component, and a tear-off tab device. The tear-off tab device is connected, in particular, at one end, preferably with the first tab element, directly to the first steering column component and at another end, preferably with the second tab element, more preferably with the bending tab, directly to the second steering column component. Preferably, the first steering column component is coupled to a steering spindle, while the second steering column component is coupled to the steering wheel.

[0025] Furthermore, the invention relates to a method for manufacturing a tear-off tab device. It is proposed that the second tab element be partially sheared relative to the first tab element by shearing. Preferably, the second tab element is partially sheared relative to the first tab element by deep drawing in a shearing step. Preferably, prior to the shearing step, the tear-off tab device is punched and / or laser-cut from a sheet metal part in a preparation step. It is further proposed that the second tab element be deflected relative to the first tab element by shearing and / or embossing by at least 50% to a maximum of 90% of the thickness of the first tab element. Preferably, the method includes at least one shearing and / or embossing step in which the second tab element is arranged offset relative to the first tab element.Preferably, in the shearing and / or embossing step, a blank of the tear-off tab device is inserted into a shearing and / or embossing device. The blank is, in particular, a contour of the tear-off tab device cut from a plate or film, especially sheet metal, and especially punched out. In the blank, the tab elements are preferably arranged in a common main plane of the blank and, in particular, form a common continuous largest outer surface of the blank. Preferably, in the shearing and / or embossing step, the second tab element is deflected relative to the first tab element by at least 75% to a maximum of 90% of the thickness of the first tab element, in particular from the main plane of the blank.Preferably, the second tab element is deep-drawn in the shearing and / or embossing step by means of a press punch of the shearing and / or embossing device, so that the second connecting edge is produced by shearing and / or embossing between the first and second tab elements. Preferably, in the shearing and / or embossing step, the first tab element is counter-supported by a, in particular, stationary, counter-support of the shearing and / or embossing device. Preferably, the depth of deflection of the second tab element relative to the first tab element is adjusted by a stroke adjustment of a press punch of the shearing and / or embossing device and / or a counter-pressure of the counter-support.The design according to the invention allows for particularly advantageous properties with regard to the manufacture of the tear-off tab device, especially the offset arrangement of the second tab element relative to the first tab element.

[0026] Furthermore, it is proposed that the second tab element be deflected relative to the first tab element by means of shearing and / or embossing, wherein the diameter of a press punch of a shearing and / or embossing device is greater than or equal to the diameter of a recess bounded by a counter-holder of the shearing and / or embossing device. Preferably, a press punch is used in the shearing and / or embossing step that has a maximum diameter which is at most 3%, preferably at most 7%, and particularly preferably at most 10% larger than the recess bounded by the counter-holder. Preferably, in the shearing and / or embossing step, the maximum transverse extent of the underside is defined by the diameter of the recess bounded by the counter-holder. Preferably, in the shearing and / or embossing step, the maximum transverse extent of the top side is defined by the maximum diameter of the press punch.Preferably, the underside and the top side are produced in the same shearing and / or embossing step. Preferably, in the shearing and / or embossing step, a rounding of the second connecting edge, in particular the rounding of the first section of the first shear edge and the rounding of the first section of the second shear edge, is formed by the diameter of the press punch, which extends at least substantially perpendicular to a stroke direction of the press punch, and a radius in a plane that runs at least substantially parallel to the stroke direction. Preferably, the formation of the fracture zone by an offset between the diameter of the press punch and the diameter of the recess limited by the counter-holder is prevented in the shearing and / or embossing step. The design according to the invention allows for particularly advantageous properties with regard to an increased shearing depth.Particularly advantageous properties can be achieved with regard to avoiding a fracture zone in the tear-off tab device, thereby particularly resulting in an increased shearing depth and improved adjustability of the force-displacement requirement. Particularly advantageous properties can be achieved with regard to a defined force-displacement behavior of the tear-off tab device.

[0027] The tear-off tab device according to the invention is not to be limited to the application and embodiment described above. In particular, the tear-off tab device according to the invention may, to achieve a functionality described herein, have a different number of individual elements, components, and units than the number specified herein. Furthermore, values ​​within the specified limits of the value ranges stated in this disclosure are also to be considered disclosed and freely usable.

[0028] Drawings

[0029] Further advantages will become apparent from the following description of the drawings. The drawings illustrate three exemplary embodiments of the invention. The drawings, the description, and the claims contain numerous features in combination. A person skilled in the art will expediently consider the features individually and combine them into meaningful further combinations.

[0030] They show:

[0031] Fig. 1 shows a vehicle with a steering column which has a tear-off device according to the invention, in a schematic representation,

[0032] Fig. 2 shows the steering column with a first steering column component, with a second steering column component and with a tear-off tab device according to the invention in a schematic representation,

[0033] Fig. 3 shows the tear-off tab device according to the invention with a first tab element, a second tab element and a bending tab in a schematic top view,

[0034] Fig. 4 shows the tear-off tab device according to the invention with the first tab element, the second tab element and the bending tab in a schematic sectional view along section line IV-IV,

[0035] Fig. 5 shows the tear-off tab device according to the invention with the first tab element, the second tab element and the bending tab in a schematic sectional view along the section line VV,

[0036] Fig. 6 shows the tear-off tab device and a shearing device according to the invention in a schematic provisioning step,

[0037] Fig. 7 shows the tear-off tab device according to the invention and a shearing device in a schematic shearing step,

[0038] Fig. 8 shows a schematic side view of the press ram of the shearing device, Fig. 9 shows a schematic force-displacement diagram of the tear-off tab device according to the invention,

[0039] Fig. 10 shows the tear-off tab device according to the invention and an alternative embodiment of the shearing device.

[0040] Fig. 11 shows the tear-off tab device according to the invention and an alternative embodiment of the shearing device.

[0041] Fig. 12 shows a schematic flowchart of a method for manufacturing the tear-off tab device according to the invention.

[0042] Fig. 13 shows a cross-sectional view of an alternative tear-off tab device with a first tab element and a second tab element in a schematic representation.

[0043] Fig. 14 shows a section of the cross-sectional view of the alternative tear-off tab device with a first tab element and a second tab element according to Figure 13 in a schematic representation,

[0044] Fig. 15 shows a cross-sectional view of an alternative tear-off tab device with a first tab element and a second tab element in a schematic representation.

[0045] Fig. 16 shows a section of the cross-sectional view of the alternative tear-off tab device with a first tab element and a second tab element according to Figure 15 in a schematic representation,

[0046] Fig. 17 shows a bird's-eye view of an alternative tear-off tab device with a first tab element and a second tab element in a schematic representation and

[0047] Fig. 18 shows a schematic flowchart of a method for manufacturing the alternative tear-off tab device according to the invention.

[0048] Description of the exemplary embodiment

[0049] Figure 1 shows a vehicle 14a with a steering column 12a, which has a

[0050] The vehicle 14a is a motor vehicle. The vehicle 14a is a passenger car. The steering column 12a is designed to transmit a steering movement from a steering wheel 42a of the vehicle 14a to wheels 44a of the vehicle 14a. The steering column 12a has at least a first steering column component 18a and a second steering column component 22a. The first steering column component 18a is coupled to a steering spindle 46a, while the second steering column component 22a is coupled to the steering wheel 42a. The first steering column component 18a is formed by a bracket. The first steering column component 18a includes mounting tabs 48a. The first steering column component 18a includes, by way of example, six mounting tabs 48a for connection to the tear-off device 10a. Furthermore, the second steering column component 22a is formed by a slide.The second steering column component 22a includes, by way of example, at least one attachment point (not shown) for connection with the tear-off tab device 10a. Preferably, the first steering column component 18a and the second steering column component 22a are connected axially only via the tear-off tab device 10a.

[0051] The tear-off device 10a is formed by a bending tear-off device. Preferably, the tear-off device 10a is formed by a bending tear-off tab. The tear-off device 10a is a safety-relevant component that guarantees defined crash behavior. In the event of an accident and the resulting impact of a driver on the steering wheel 42a, the forces occurring are preferably absorbed by the tearing of the tear-off device 10a in correlation with the active retraction of the steering column 12a. The tear-off device 10a is for a steering column 12a of a vehicle 14a.

[0052] The tear-off tab device 10a has a first tab element 16a for connection with the first steering column component 18a. The first tab element 16a has a U-shaped base with a base 50a and two legs 52a, 52'a. The first tab element 16a is formed in one piece. The first tab element 16a consists of a sheet, in particular a steel sheet. The first tab element 16a is connected to the first steering column component 18a at the legs 52a, 52'a. The first tab element 16a has slots 54a, 54'a on the legs 52a, 52'a for connection with the mounting tabs 48a of the first steering column component 18a. The fastening tabs 48a engage through the slots 54a, 54'a of the first tab element 16a. Furthermore, the first tab element 16a is screwed to the first steering column component 18a, particularly in a manner that is not otherwise visible.

[0053] The first tab element 16a can have boreholes 56a, 56'a on the legs 52a, 52'a.

[0054] The tear-off tab device 10a further comprises a second tab element 20a integrally connected to the first tab element 16a. The second tab element 20a is designed for connection with the second steering column component 22a. The second tab element 20a has a rectangular basic shape. However, other shapes that would appear useful to a person skilled in the art are also conceivable. Furthermore, the tear-off tab device 10a comprises a bending tab 36a, which is integrally connected to a free end of the second tab element 20a and is, in particular, bent by at least approximately 180°. The bending tab 36a is integrally connected at one end to the second tab element 20a and forms a fastening section 58a at an end facing away from the second tab element 20a for a direct connection with the second steering column component 22a.The fastening section 58a is exemplified by an eyelet, which is designed to be attached, invisibly, to a hook of the second steering column component 22a. The bending tab 36a is arranged as an extension of the second tab element 20a. The bending tab 36a forms part of the second tab element 20a. The bending tab 36a forms an arc and is directly connected to the second steering column component 22a on one side of the arc facing away from the second tab element 20a. For clarity, the bending tab 36a is shown straight in Figure 3, while it is shown bent in Figures 2 and 5.

[0055] The first tab element 16a forms a first, permanent connecting edge 24a to the second tab element 20a and at least one second connecting edge 26a, 26'a to the second tab element 20a, forming a predetermined breaking edge, which is designed to break in a defined manner in a crash. The first tab element 16a forms a first, permanent connecting edge 24a to the second tab element 20a and two second connecting edges 26a, 26'a to the second tab element 20a, each forming a predetermined breaking edge, which are designed to break in a defined manner in a crash. The two legs 52a, 52'a of the first tab element 16a are connected to the second tab element 20a via the second connecting edges 26a, 26'a, while the base 50a of the first tab element 16a is connected to the second tab element 20a via the first permanent connecting edge 24a.The second tab element 20a is therefore connected to the first tab element 16a via two secondary connecting edges 26a, 26'a, each forming a predetermined breaking edge, and a permanent connecting edge 24a. The two secondary connecting edges 26a, 26'a, each forming a predetermined breaking edge, run parallel to each other. The two secondary connecting edges 26a, 26'a are each formed by a shear edge. The two secondary connecting edges 26a, 26'a are each located on opposite sides of the second tab element 20a. The first tab element 16a and the second tab element 20a have the same material thickness.

[0056] The first tab element 16a has a first principal extension plane 28a and the second tab element 20a has a second, different from the first.

[0057] The first main extension plane 28a and the second main extension plane 30a are aligned parallel to each other and offset from each other. The second main extension plane 30a is arranged parallel to the first main extension plane 28a and spaced apart. The distance between the second main extension plane 30a and the first main extension plane 28a is less than the material thickness of the second tab element 20a. The second tab element 20a is offset section by section from the first tab element 16a such that the tab elements 16a and 20a remain connected at the second connecting edges 26a and 26'a, but a defined breaking point is formed at the second connecting edges 26a and 26'a. The second tab element 20a is partially sheared relative to the first tab element 16a.The second tab element 20a is partially offset from the first tab element 16a by means of shearing and / or deep drawing. The first tab element 16a and the second tab element 20a remain connected, with a central plane of the second.

[0058] The second tab element 20a is deflected relative to the first tab element 16a. The second tab element 20a is partially offset from the first tab element 16a by means of shearing. Preferably, the second tab element 20a is partially offset from the first tab element 16a by means of deep drawing. The second tab element 20a is sheared to varying depths along a longitudinal direction 32a. The shear depth 34a is defined by the smallest distance, measured perpendicular to the first principal extension plane 28a, between a top surface of the first tab element 16a and a top surface of the second tab element 20a. The shear depth 34a changes continuously. Preferably, the shear depth 34a at every point along the longitudinal direction 32a is less than the material thickness of the first or second tab element 16a, 20a.The second tab element 20a is sheared to varying depths along a path parallel to the second connecting edges 26a, 26'a. The second tab element 20a exhibits a defined force-displacement tearing profile, where a tearing force at a point is defined by a shearing depth 34a at that point.

[0059] Figure 9 shows a schematic force-displacement diagram of the illustrated tear-off tab device 10a. The diagram depicts a force-displacement curve 90a, with the force in N plotted on the ordinate axis and the displacement in mm on the abscissa axis. Furthermore, the diagram shows a reference range 92a, represented by two boundary lines, within which the force-displacement curve 90a should move.

[0060] The various shear depths 34a along the path of the second tab element 20a are generated by a defined shape of a press die 60a for the production of the tear-away tab device 10a. Figure 5 shows a tear-away tab device 10a with an exemplary progression of the shear depths 34a. The second tab element 20a has a first section 62a in which the shear depth 34a is high, so that only a low tearing force is required. The second tab element 20a also has a second section 64a in which the shear depth 34a decreases. Furthermore, the second tab element 20a has a third section 66a in which the shear depth 34a is low, so that a high tearing force is required in this section 66a. The second tab element 20a also has a fourth section 68a in which the shear depth 34a increases.Furthermore, the second tab element 20a has a fifth section 70a in which the shear depth 34a is high, so that only a low tearing force is required. Following the fifth section 70a, the second tab element 20a transitions into the base 50a of the first tab element 16a. The press punch 60a has sections 72a, 74a, 76a, 78a, 80a corresponding to sections 62a, 64a, 66a, 68a, 70a of the second tab element 20a. A tool, in particular the press punch 60a, for producing the shear has different heights, which in turn create different shear depths 34a.

[0061] Figure 6 shows the tear-off tab device 10a and a shearing device 82a in a setup step 86a of a method for manufacturing the tear-off tab device 10a before shearing. Figure 12 shows a schematic flow diagram of a method for manufacturing the tear-off tab device 10a. In a setup step 86a of the method for manufacturing the tear-off tab device 10a, the tear-off tab device 10a is punched and / or laser-cut from a sheet metal part. This is followed by a shearing step 88a. In the shearing step 88a, the tear-off tab device 10a is inserted into the shearing device 82a. The shearing device 82a is formed, for example, by a shearing and / or deep-drawing device. The shearing device 82a has the press punch 60a and a counter-holder 84a. For shearing, the second tab element 16a is applied to the counter-holder 84a (Figure 6).The second tab element 20a is then deep-drawn using the press die 60a, creating a shear between the first tab element 16a and the second tab element 20a in the area of ​​the second connecting edges 26a, 26'a. The second tab element 20a is partially sheared relative to the first tab element 16a. It would also be conceivable to punch out the tear-away tab device 10a in the same process step using the shearing device 82a, thus integrating the provisioning step 86a into the shearing step 88a.

[0062] The tearing forces can also be influenced by other factors of the shearing device 82a. The tearing forces can be influenced by setting a distance 94a between the press ram 60a and the counter support 84a (Figure 10). Alternatively or additionally, the tearing forces can be influenced by setting a radius 96a on the press ram 60a and / or on the counter support 84a (Figure 11).

[0063] Figures 13 to 16 show a further embodiment of the invention. The following descriptions and drawings are essentially limited to the differences between the embodiments, whereby with regard to identically designated components, in particular components with the same reference numerals, reference may also be made to the drawings and / or the description of the other embodiments, especially Figures 1 to 12. To distinguish the embodiments, the letter a is appended to the reference numerals of the embodiment in Figures 1 to 12. In the embodiments of Figures 13 to 16, the letter a is replaced by the letters b to c.

[0064] Fig. 13 shows a schematic cross-sectional view of an alternative tear-off tab device 10b with a first tab element 16b and a second tab element 20b. The second tab element 20b has a top surface 98b and a bottom surface 100b, wherein a maximum transverse extent of the top surface 98b, which is at least substantially perpendicular to a longitudinal direction of the tear-off tab device 10b, is at least substantially equal to a maximum transverse extent of the bottom surface 100b, which is at least substantially parallel to the maximum transverse extent of the top surface 98b. The top surface 98b and the bottom surface 100b each form one of the two largest outer surfaces of the second tab element 20b.The maximum transverse extent of the upper surface 98b and the maximum transverse extent of the lower surface 100b are greater than the maximum thickness of the second tab element 20b, which extends at least substantially perpendicular to the principal extent plane of the second tab element 20b. The upper surface 98b is designed to be positioned on a side facing away from the steering column when the tear-off tab device 10b is mounted on the steering column. The lower surface 100b is designed to be positioned on a side facing the steering column when the tear-off tab device 10b is mounted on the steering column. A principal extent plane of the upper surface 98b is aligned at least substantially parallel to a principal extent plane of the lower surface 100b.The principal extension plane of the upper surface 98b and the principal extension plane of the lower surface 100b extend at least substantially parallel to the principal extension plane of the first tab element 16b. The maximum transverse extension of the upper surface 98b and the maximum transverse extension of the lower surface 100b are aligned at least substantially parallel to the principal extension plane of the second tab element 20b. The second tab element 20b is deflected at least substantially perpendicular to the principal extension plane of the second tab element 20b relative to the first tab element 16b by a shear depth 34b of at least 30% to a maximum of 50% of the thickness of the first tab element 16b, which in particular extends at least substantially perpendicular to the principal extension plane of the first tab element 16b. The tear-away tab device 10b has a second connecting edge 26b.The second connecting edge 26b is formed by a first shear edge 102b and a second shear edge 104b. The first shear edge 102b and the second shear edge 104b are each designed as connecting surfaces that connect the first tab element 16b to the second tab element 20b. A principal extension plane of the first shear edge 102b and a principal extension plane of the second shear edge 104b are oriented at least substantially perpendicular to the principal extension plane of the first tab element 16b and at least substantially parallel to the principal extension direction of the tear-off tab device 10b. The first shear edge 102b and the second shear edge 104b are designed as steps. The first shear edge 102b and the second shear edge 104b define a tear-off edge 118b. The tear-off edge 118b extends, in a state of tear-off of the second tab element 20b from the first tab element 16b, at least substantially perpendicular to the.

[0065] The main extension plane of the first tab element 16b. The first shear edge 102b is subdivided into a first section 106b on the top 98b and a second section 108b on the bottom 100b. The second shear edge 104b is subdivided into a first section 110b on the top 98b and a second section 112b on the bottom 100b. The tear-off edge 118b, in a state of tear-off of the second tab element 20b from the first tab element 16b, runs from the first section 106b of the first shear edge 102b to the second section 108b of the first shear edge 102b and from the first section 110b of the second shear edge 104b to the second section 112b of the second shear edge 104b.

[0066] Fig. 14 shows a schematic cross-sectional view of an alternative tear-off tab device 10c with a first tab element 16c and a second tab element 20c. The second tab element 20c has a top surface 98c and a bottom surface 100c, wherein the maximum transverse extent of the top surface 98c, which is at least substantially perpendicular to a longitudinal direction of the tear-off tab device 10c, is greater than the maximum transverse extent of the bottom surface 100c, which is at least substantially parallel to the maximum transverse extent of the top surface 98c. The difference between the maximum transverse extent of the top surface 98c and the maximum transverse extent of the bottom surface 100c is at most 15 mm, at most 10 mm, and particularly preferably at most 5 mm. The maximum transverse extent of the top surface 98c is extended on both sides relative to the maximum transverse extent of the bottom surface 100c.The respective centers of the maximum transverse extent of the top surface 98c and the maximum transverse extent of the bottom surface 100c are arranged in a common plane that is at least substantially perpendicular to the principal extension plane of the second tab element 20c and in which a principal extension direction of the second tab element 20c lies. The maximum transverse extent of the top surface 98c and the maximum transverse extent of the bottom surface 100c are each centered on the principal extension direction of the tear-away tab device 10c. The second tab element 20c is deflected relative to the first tab element 16c by a shear depth 34c of at least 70% to a maximum of 90% of the thickness of the first tab element 16c. The tear-away tab device 10c has a second connecting edge 26c.The second connecting edge 26c has a first shear edge 102c, which is subdivided into a first section 106c on the top 98c and a second section 108c on the bottom 100c, and a second shear edge 104c, which is subdivided into a first section 110c on the top 100c and a second section 112c on the bottom 98c. The principal extension planes of the first section 106c of the first shear edge 102c, the second section 108c of the first shear edge 102c, the first section 110c of the second shear edge 104c, and the second section 112c of the second shear edge 104c are oriented at least substantially perpendicular to the principal extension plane of the first tab element 16c and at least substantially parallel to the principal extension direction of the tear-away tab device 10c.The first section 106c of the first shear edge 102c is arranged at least substantially parallel to the maximum transverse extent of the top surface 98c and spaced apart from the second section 108c of the first shear edge 102c. The first section 110c of the second shear edge 104c is arranged at least substantially parallel to the maximum transverse extent of the top surface 98c and spaced apart from the second section 112c of the second shear edge 104c. The difference between the maximum transverse extent of the top surface 98c and the maximum transverse extent of the bottom surface 100c defines at least one shear edge 118c at the first shear edge 102c and at the second shear edge 104c. The shear edge 118c is adjustable by a shear depth 34c. The tear-off edge 118c is set by the difference between the maximum shear depth 34c and a maximum diameter, at least substantially perpendicular to a principal extension plane of the first tab element 16c.A first shear edge 118c is formed in a cross-sectional plane extending at least substantially parallel to the principal extension plane of the second tab element 20c, between the first section 106c of the first shear edge 102c and the second section 108c of the first shear edge 102c. A second shear edge 118c is formed in a cross-sectional plane extending at least substantially parallel to the principal extension plane of the second tab element 20c, between the first section 110c of the second shear edge 104c and the second section 112c of the second shear edge 104c.

[0067] The connecting edge 26c is formed with at least one radius 114c and / or chamfer in at least one cross-sectional plane extending at least substantially perpendicular to a longitudinal direction of the tear-off tab device 10c. Preferably, the first section 106c of the first shear edge 102c and the first section 110c of the second shear edge 104c are formed with a radius 114c in the at least one cross-sectional plane. Preferably, the radius 114c of the first section 106c of the first shear edge 102c and the radius 114c of the first section 110c of the second shear edge 104c are identical in the at least one cross-sectional plane. The radius 114c of the first section 106c of the first shear edge 102c is mirror-symmetrical in the cross-sectional plane along the principal extension direction of the tear-off tab device 10c. The rounding 114c has a radius which is less than or equal to the maximum thickness of the second tab element 20c.The connecting edge 26c is formed section by section as a radius 114c and / or chamfer along one main extension direction of the tear-off tab device 10c. The second tab element 20c has sections along one main extension direction of the tear-off tab device 10c which are free of a connecting edge 26c formed as a radius 114c and / or chamfer. In the sections without a radius 114c and / or chamfer, the connecting edge 26c is formed as a step.

[0068] The second tab element 20c has a top surface 98c and a bottom surface 100c, with the transverse extent of the top surface 98c varying along a principal extension direction of the tear-off tab device 10c. The second tab element 20c exhibits a widening of the transverse extent of the top surface 98c along the principal extension direction of the tear-off tab device 10c. The transverse extent of the top surface 98c is shaped differently in several successive segments along the principal extension direction. The transverse extent of the second tab element 20c is specifically adjusted by the rounding 114c and / or chamfer of the connecting edge 26c.The variation in the transverse extent of the top surface 98c occurs at the first shear edge 102c and at the second shear edge 104c in a mirror-symmetrical manner about a plane in which the principal extension direction of the tear-away device 10c lies and which runs at least substantially perpendicular to the principal extension plane of the second tab element 20c. The widening or tapering of the transverse extent of the top surface 98c is formed via a continuous, in particular rounded, transition profile. The second tab element 20c has a substantially constant thickness along the principal extension direction of the tear-away device 10c, which extends at least substantially perpendicular to the principal extension plane of the second tab element 20c, in order to enable a uniform load distribution when forces are introduced.

[0069] Fig. 16 shows a schematic flowchart of a method for manufacturing the alternative tear-off tab device 10c according to the invention. In a preparation step 86c of the method for manufacturing the tear-off tab device 10c, the tear-off tab device 10c is punched and / or laser-cut from a sheet metal part. Subsequently, in a shearing and / or embossing step 116c of the method, the second tab element 20c is deflected relative to the first tab element 16c by shearing and / or embossing by at least 50% to a maximum of 90% of the thickness of the first tab element 16c. A blank of the tear-off tab device 10c is placed in a shearing and / or embossing device in the shearing and / or embossing step 116c.In the shearing and / or embossing step 116c, the second tab element 20c is deflected relative to the first tab element 16c by shearing and / or embossing by at least 75% and at most 90% of the thickness of the first tab element 16c, in particular from a blank main extension plane. In the shearing and / or embossing step 116c, the second tab element 20c is deep-drawn by means of a press punch of the shearing and / or embossing device, so that the second connecting edge 26c is produced by shearing and / or embossing between the first tab element 16c and the second tab element 20c. In the shearing and / or embossing step 116c, the first tab element 16c is counter-supported by a, in particular, immobile counter-support of the shearing and / or embossing device.The depth of deflection of the second tab element 20c relative to the first tab element 16c is set via a stroke adjustment of a press ram of the shearing device and / or embossing device and / or a counter pressure of the counter holder of the shearing device and / or embossing device.

[0070] The second tab element 20c is deflected relative to the first tab element 16c by shearing and / or embossing, wherein the diameter of the press punch of a shearing and / or embossing device is greater than or equal to the diameter of a recess bounded by the counter-holder of the shearing and / or embossing device. In the shearing and / or embossing step 116c, a press punch is used which has a maximum diameter that is at most 3%, at most 7%, and particularly preferably at most 10% larger than the recess bounded by the counter-holder. In the shearing and / or embossing step 116c, the maximum transverse extent of the underside 100c is defined by the diameter of the recess bounded by the counter-holder. In the shearing and / or embossing step 116c, the maximum transverse extent of the top side 98c is defined by the maximum diameter of the press punch.In the shearing and / or embossing step 116c, the underside 100c and the topside 98c are produced in the same operation. Due to the diameter of the press punch 60c, which extends at least substantially perpendicular to a stroke direction of the press punch 60c, and a radius in a plane that runs at least substantially parallel to the stroke direction, a rounding 114c of the second connecting edge 26c, in particular the rounding 114c of the first section 106c of the first shearing edge 102c and the rounding 114c of the first section 110c of the second shearing edge 104c, is formed in the shearing and / or embossing step 116c.

Claims

Claims 1. Tear tab device (10a; 10b; 10c), in particular a bending tear tab device, especially for a steering column (12a) of a vehicle (14a), with at least one first tab element (16a; 16b; 16c), in particular for a connection with a first steering column component (18a), and with a second tab element (20a; 20b; 20c) integrally connected with the first tab element (16a; 16b; 16c), in particular for a connection with a second steering column component (22a), wherein the first tab element (16a; 16b; 16c) has at least one first permanent connecting edge (24a) to the second tab element (20a; 20b; 20c) and at least one second connecting edge (26a; 26b; 26c, 26'a) forming a predetermined tear edge to the second tab element (20a; 20b; 20c) which is in particular designed to tear in a defined manner in the event of a crash, characterized in that the first tab element (16a; 16b;16c) has a first principal extension plane (28a) and the second tab element (20a; 20b; 20c) has a second principal extension plane (30a) different from the first principal extension plane (28a).; 2. Tear tab device (10a) according to claim 1, characterized in that the second principal extension plane (30a) is arranged parallel to the first principal extension plane (28a) at a distance from each other.

3. Tear tab device (10a) according to claim 1 or 2, characterized in that the second tab element (20a) is at least partially sheared relative to the first tab element (16a).

4. Tear tab device (10a) according to one of the preceding claims, characterized in that the second tab element (20a) is arranged partially offset to the first tab element (16a) by means of scissors.

5. Tear tab device (10a) according to one of the preceding claims, characterized in that the second tab element (20a) is sheared to different depths along a path along a longitudinal direction (32a).

6. Tear tab device (10a) according to one of the preceding claims, characterized in that the second tab element (20a) has a defined force-displacement tear profile, wherein a tear force at a point is defined by a shear depth (34a) at that point.

7. Tear tab device (10a) according to one of the preceding claims, characterized in that the second connecting edge (26a, 26a') is formed by a shear edge.

8. Tear tab device (10a) according to one of the preceding claims, characterized by a bend tab (36a) which is integrally connected to a free end of the second tab element (20a) and is, in particular, bent by at least approximately 180°.

9. Tear tab device (10b) according to one of the preceding claims, characterized in that the second tab element (20b) has a top (98b) and a bottom (100b), wherein a maximum transverse extent of the top (98b), which extends at least substantially perpendicular to a longitudinal direction (32b) of the tear tab device (10b), is at least substantially equal to a maximum transverse extent of the bottom (100b), which extends at least substantially parallel to the maximum transverse extent of the top (98b).

10. Tear tab device (10c) according to one of claims 1 or 8, characterized in that the second tab element (20c) has a top (98c) and a bottom (100c), wherein a maximum transverse extent of the top (98c), which extends at least substantially perpendicular to a longitudinal direction (32c) of the tear tab device (10c), is greater than a maximum transverse extent of the bottom (100c), which extends at least substantially parallel to the maximum transverse extent of the top (98c).

11. Tear tab device (10c) according to one of the preceding claims, characterized in that the second connecting edge (26c) is formed with at least a rounding (114c) and / or chamfer in at least one cross-sectional plane which extends at least substantially perpendicular to a longitudinal direction (32c) of the tear tab device (10c).

12. Tear tab device (10c) according to one of the preceding claims, characterized in that the second tab element (20c) has a top (98c) and a bottom (100c), wherein a transverse extension of the top (98c) varies along a principal extension direction of the tear tab device (10c).

13. Steering column (12a) comprising a first steering column component (18a), a second steering column component (22a) and a tear-off tab device (10a) according to one of the preceding claims.

14. Method for manufacturing a tear-off tab device (10a; 10b; 10c) according to any one of claims 1 to 12.

15. Method according to claim 14, characterized in that the second tab element (20a) is partially sheared relative to the first tab element (16a) by means of shears.

16. Method according to claim 14, characterized in that the second tab element (20c) is deflected relative to the first tab element (16c) by means of shearing and / or embossing by at least 50% to a maximum of 90% of the thickness of the first tab element (16c).

17. Method according to claim 14, characterized in that the second tab element (20c) is deflected relative to the first tab element (16c) by means of shearing and / or embossing, wherein a diameter of a press punch of a shearing device and / or embossing device is greater than or equal to a diameter of a recess bounded by a counter holder of the shearing device and / or embossing device.

Images