Stabilizer adhesive bearing for a vehicle stabilizer, vehicle stabilizer with stabilizer adhesive bearing and a method for forming a stabilizer adhesive bearing on a vehicle stabilizer

Description

[0001] The present invention relates to a stabilizer adhesive bearing for a vehicle stabilizer, a vehicle stabilizer comprising at least one stabilizer adhesive bearing and a method for forming a stabilizer adhesive bearing on a vehicle stabilizer. State of the art

[0002] Vehicle stabilizers for motor vehicles are known in the art in a variety of designs and are also referred to, for example, as anti-roll bars, stabilizing torsion bars, or torsion spring bars. These stabilizing torsion bars serve to stabilize the vehicle body against tilting and twisting, particularly when cornering, driving over changing road surfaces, and on uneven road surfaces. Such stabilizers are typically located near the front and rear axles and usually extend across the entire width of the vehicle.The attachment of such stabilizers to the chassis on the one hand and the body on the other hand poses the problem that the vibrations, oscillations, and noises arriving at, generated by, and / or absorbed by the chassis, such as wheel and road noise, are transmitted via the attachment to the body and thus also into the passenger compartment. To dampen, and in particular to reduce, this transmission, the stabilizers are usually attached with damping stabilizer bearings. These stabilizer bearings are also known in the art as sleeve bearings, which have a rigid outer sleeve, also referred to as an annular sleeve, and an elastic inner contour arranged coaxially within this annular sleeve.Also known is the arrangement of an elastic inner contour on a stabilizer bar, wherein the stabilizer bar is fastened to a vehicle underbody via the elastic inner contour arranged thereon, in particular with a clamp. Generally, there is a rigid external device which is fastened to a vehicle underbody, wherein within this external device there is an elastic inner contour which is arranged coaxially around a stabilizer. These aforementioned bearings can be differentiated according to their mode of operation into plain bearings, clamp bearings, adhesive bearings, and bonded bearings. When plain bearings are used, the stabilizer can move freely in torsional and axial directions against a slight frictional force. Additional precautions are taken to axially secure the component.Clamp bearings establish a clamping connection to the stabilizer and, in a relaxed state, have an inner diameter that is smaller than the outer diameter of the stabilizer on which the clamp bearing is arranged. Clamp bearings are typically preloaded during assembly on a stabilizer and then arranged on the stabilizer. Clamp bearings can also have a coaxial inner sleeve. Adhesive bearings establish an adhesive connection to the stabilizer using an adhesive system, wherein the elastic inner contour adheres at least partially to the outer surface of the stabilizer on which the adhesive bearing is arranged. A variety of adhesive systems, in particular comprising a primer and a cover, are known in the prior art for adhering the adhesive bearing arranged on the stabilizer.Adhesive mounts establish an adhesive bond to the stabilizer using an adhesive composition, with the elastic inner contour being at least partially bonded to the outer surface of the stabilizer to which the adhesive mount is arranged. A variety of adhesive compositions and adhesive systems, particularly including two-component systems with a binder and hardener, are known in the prior art for bonding the adhesive mount arranged on the stabilizer. A key difference between adhesive mounts and adhesive mounts is that the bonding of the adhesive mounts can be carried out at significantly lower temperatures, thus enabling a reduction in process costs.

[0003] A variety of arrangements and mounting options are known in the art for attaching stabilizer mounts to the chassis and body, all of which do not alter the basic function of the stabilizer mount. For example, a stabilizer mount can be attached to the chassis and / or body with a bearing shell or a clamp.

[0004] From DE 10 2013 001 898 A1 a stabilizer adhesive bearing with an elastic inner contour is known.

[0005] EP 2 650 150 A1 discloses the preamble of claim 1, namely a bushing and bracket integrated stabilizer bar comprising a stabilizer bar, a rubber bushing attached to an outer circumference of the stabilizer bar, and a bracket.

[0006] JP 2010 137688 A shows a technology for advantageously manufacturing a stabilizer bar with a vibration control bushing which is vulcanized and fixed to the stabilizer bar on an inner peripheral surface of an inner hole of the vibration control bushing with sufficient adhesive strength.

[0007] US 5,588,209 A discloses a method for manufacturing a vehicle stabilizer bar to which two non-metallic components are directly molded at a distance D in order to connect it to a vehicle chassis.

[0008] DE 10 2013 001 898 A1 discloses a method for improving the temperature distribution of inductively or conductively heated components, in particular but not exclusively shaped tubes and rods for use as chassis stabilizers, characterized in that cooling is carried out actively with air or water jets in the area of ​​the arches during the heating process.

[0009] The present invention is therefore based on the object of providing an improved vehicle stabilizer and / or a stabilizer adhesive mount and an improved method for forming a stabilizer adhesive mount on a vehicle stabilizer, in which the aforementioned disadvantages are avoided. In particular, this improved vehicle stabilizer and / or stabilizer adhesive mount and the improved method for forming a stabilizer adhesive mount on a vehicle stabilizer should make it possible to reduce relative movements between the stabilizer and the stabilizer adhesive mount that occur during operation of the stabilizer and to achieve improved driving dynamics. Furthermore, an stabilizer adhesive mount should be provided that at least partially combines the advantages of a clamp mount and those of an adhesive mount.In addition, the production of an at least partial adhesive bond between a stabilizer and an adhesive bearing arranged thereon should be carried out more quickly and / or at a lower process temperature than with adhesive bearings and / or adhesive bearings according to the prior art, which results in the advantage of lower energy consumption of the process. In addition, an adhesive bond between the stabilizer adhesive bearing and the stabilizer under preload should be ensured without tears in the stabilizer adhesive bearing. Furthermore, the improved method for producing a stabilizer, comprising a stabilizer adhesive bearing, should provide a stable manufacturing process for bonding stabilizer adhesive bearings to a stabilizer. In addition, the improved method for producing the stabilizer, comprising a stabilizer adhesive bearing, should be able to be implemented easily and reliably in existing processes. Disclosure of the invention

[0010] This object is achieved with a stabilizer adhesive bearing according to claim 1, a method for forming a stabilizer adhesive bearing according to claim 2 and a vehicle stabilizer according to claims 8 and 9.

[0011] The stabilizer for vehicles according to the invention, in particular comprising at least one stabilizer adhesive bearing, has the advantage over conventional stabilizers that the properties of a clamping bearing are at least partially combined with those of an adhesive bearing.

[0012] The method according to the invention for forming a stabilizer adhesive bearing, in particular for producing torsion bar shoulder bearings for vehicles, has the advantage over conventional methods that it can be carried out more quickly and / or at a lower process temperature, resulting in lower energy consumption. A further advantage of the method according to the invention is that it can be easily and reliably integrated into existing processes.

[0013] The subject of the invention is therefore a stabilizer adhesive bearing for a vehicle stabilizer, wherein the stabilizer adhesive bearing for coaxial arrangement on the vehicle stabilizer comprises at least one annular sleeve with an elastic inner contour, wherein the elastic inner contour of the at least one annular sleeve has, at least on the side facing the vehicle stabilizer, a three-dimensionally structured surface with an adhesive absorption volume, wherein the three-dimensionally structured surface has a maximum roughness depth (R max ) of greater than 45µm and a core roughness depth (RK ) of at least 65% based on the maximum roughness depth (R max ) of the three-dimensionally structured surface, wherein the maximum roughness depth (R max ) is the sum of the reduced peak height, core roughness depth (R k ) and the reduced groove depth (R vk ), wherein the reduced peak height (R pk ),the reduced groove depth (R vk ) and the core roughness depth (RK ) are determined according to EN ISO 13565-2: December 1997, wherein the at least one annular sleeve in the longitudinal direction of the vehicle stabilizer additionally has at least one first sealing element arranged at one end of the at least one annular sleeve and at least one further sealing element arranged at the other end of the at least one annular sleeve.

[0014] Another object of the invention is a method for forming a stabilizer adhesive bearing on a vehicle stabilizer, in particular for producing torsion bar shoulder bearings for motor vehicles, comprising the steps: a) Providing a stabilizer with a lateral surface for arranging a stabilizer adhesive bearing; b) Providing the stabilizer adhesive bearing comprising at least one annular sleeve with an elastic inner contour at least on the side facing the vehicle stabilizer, wherein the elastic inner contour has a three-dimensionally structured surface with an adhesive absorption volume, wherein the three-dimensionally structured surface has a maximum roughness depth (R max ) of greater than 45 µm and a core roughness depth (RK ) of at least 65% based on the maximum roughness depth (R max ) of the three-dimensionally structured surface, wherein the maximum roughness depth (R max ) is the sum of the reduced peak height (R pk ) and the reduced groove depth (R vk ), wherein the reduced peak height (R pk ), the reduced groove depth (R vk ) and the core roughness depth (RK ) are determined according to EN ISO 13565-2: December 1997;c) Providing at least one mounting device; d) Providing at least one adhesive composition; e) At least partially pretreating the three-dimensionally structured surface of the stabilizer adhesive bearing provided in step b) and / or the lateral surface for arranging the stabilizer adhesive bearing of the stabilizer provided in step a) with the at least one adhesive composition provided in step d); f) Arranging the at least one stabilizer adhesive bearing provided in step b) or at least partially pretreated in step e) in the at least one mounting device provided in step c);g) arranging the stabilizer provided in step a) in the stabilizer adhesive mount in the assembly device arranged in step f), thereby producing an at least partial adhesive connection between the three-dimensionally structured surface at least partially pretreated in step e) and / or the lateral surface at least partially pretreated in step e);

[0015] Another object of the invention is a vehicle stabilizer comprising at least one coaxially arranged with at least one annular sleeve with an elastic inner contour, as described above.

[0016] A further subject of the invention is a vehicle stabilizer comprising at least one coaxially arranged stabilizer adhesive bearing formed according to the method according to the invention.

[0017] The invention can be implemented both in the stabilizer adhesive bearing and in a vehicle stabilizer as well as in methods for forming a stabilizer adhesive bearing. Detailed description of the invention

[0018] Within the scope of the invention, a stabilizer is also understood as a stabilizing torsion bar. In particular, sections of stabilizers and / or split stabilizers are understood as stabilizers according to the invention.

[0019] In the context of the present invention, a stabilizer adhesive bearing is understood to mean a stabilizer bearing, in particular a torsion bar bearing, which can be arranged on the stabilizer, in particular the torsion bar, with an adhesive connection.

[0020] In the context of the present invention, an annular cuff is understood to mean a cuff that can be arranged in a ring around a stabilizer and has at least one opening, in particular a slotted opening, through which the cuff can be arranged on a stabilizer. In particular, an annular cuff can have two ring openings and thus comprise two parts. For example, a segmented cuff comprising two or more parts is also an embodiment of the invention.

[0021] In the context of the present invention, an elastic inner contour is understood to mean the inner contour of an annular sleeve which is elastically deformable under tensile and / or compressive load, in particular when a prestress is applied, and which returns to its original shape without the tensile and / or compressive load.For example, elastic inner contours according to the invention comprising a material composition are selected from a group of fully or partially vulcanized elastomers, in particular natural rubber, poly(1,4-cis-isoprene), poly(1,4-trans-isoprene), synthetic rubbers, in particular ethylene-propylene rubbers, ethylene-propylene-diene rubbers, butyl rubbers, silicone rubbers, butadienes and / or their copolymers, rubber, polyurethanes, thermoplastic elastomers, in particular olefin-based thermoplastic elastomers, crosslinked olefin-based thermoplastic elastomers, urethane-based thermoplastic elastomers, thermoplastic polyester elastomers, thermoplastic copolyesters, styrene block copolymers, thermoplastic copolyamides and combinations thereof.

[0022] The roughness profile of the three-dimensionally structured surface, from which the maximum roughness depth (R max ), the reduced peak height (R pk ), the reduced groove depth (R vk ) and the core roughness depth (RK ) are calculated according to EN ISO 13565-2: December 1997, is determined by measuring the three-dimensionally structured surface in at least four straight measuring directions over a minimum measuring length (LN ) of at least 15 mm for each of the straight measuring directions, which deviate from each other by 45 °. In particular, the MarSurf CWM 100 measuring device with sub-nanometer resolution from Mahr GmbH, headquartered in Göttingen, Germany, can be used to measure the roughness profile of the three-dimensional structured surface, and the MarSurf MfM / MfMplus topology software from Mahr GmbH, headquartered in Göttingen, Germany, can be used to evaluate the measured roughness profile in accordance with EN ISO 13565-2: December 1997.

[0023] Adhesives are understood to mean compositions which form an adhesive bond, in particular after a curing process, between a stabilizer and a stabilizer adhesive bearing arranged on the stabilizer.

[0024] In the context of the present invention, an adhesive receiving volume is understood to mean a volume for receiving adhesive, in particular an adhesive composition. For example, a surface, in particular a three-dimensionally structured surface of an elastic inner contour, can have depressions that provide an adhesive receiving volume. In particular, surface depressions can contain adhesive.

[0025] In the context of the present invention, the terms reduced peak height (R pk ), reduced groove depth (R vk ) and core roughness (RK ) are understood according to EN ISO 13565-2: December 1997. ISO 13565-2: December 1997 is part of the disclosure of the present invention.

[0026] According to the invention, the stabilizer adhesive bearing has at least one annular sleeve in the longitudinal direction of the vehicle stabilizer, additionally at least one first sealing element arranged at one end of the at least one annular sleeve and at least one further sealing element arranged at the other end of the at least one annular sleeve.

[0027] In the context of the present invention, a sealing element is understood to mean an element for retaining adhesive, which is arranged on the annular sleeve, in particular at the end. For example, sealing elements are selected from a group of sealing lips, sealing strips, sealing rings, sealing wedges, sealing joints, or a combination thereof.

[0028] In a preferred embodiment, the order of steps e) to f) of the process according to the invention is arbitrary.

[0029] In a preferred embodiment of the method according to the invention, the arrangement in step f) is carried out under prestressing of the at least one stabilizer adhesive bearing.

[0030] In the context of the present invention, a mounting device is understood to mean a device with which a stabilizer adhesive bearing is arranged on a stabilizer. In particular, a mounting device is selected from a group consisting of a clamp, a fastening bracket, an annular clip, a clamp, a vehicle clamp, a clamp bearing composite component or a combination thereof. For example, a mounting device can also be understood to mean a tensioning device, i.e. a device with which pressure can be applied to an annular sleeve arranged in the tensioning device. Examples of a tensioning device are tensioning tools, clamps, clamps or combinations thereof.

[0031] In the context of the present invention, preload is understood to mean the application of a force greater than the weight of a stabilizer adhesive bearing arranged on a stabilizer. In particular, the application of preload is used to distribute the adhesive composition between the three-dimensionally structured surface of the stabilizer adhesive bearing and the stabilizer. For example, preload can also be applied if the stabilizer on which a stabilizer adhesive bearing is arranged has a larger outer diameter relative to the inner diameter of the stabilizer adhesive bearing in the non-arranged state. This is also referred to in the prior art as an overlap.

[0032] The application of a stabilizer adhesive mount according to the invention is usually carried out on a stabilizer according to the invention which has an at least partially coated surface. A coated surface in the context of the present invention is understood to mean the application of a firmly adhering layer of a formless composition at least partially to the surface of the stabilizer according to the invention. The coated surface can, for example, be selected according to the coating process from the group of painting, in particular spray painting, dip coating, hot-dip coating, powder coating, enameling, curtain coating, line coating, flame coating, and combinations thereof. Thus, the stabilizer according to the invention comprises a coated surface.

[0033] In the context of the present invention, an adhesive composition is understood to mean a composition in which the curing process, in particular the polymerization, is triggered by moisture, such as air humidity.

[0034] For example, the adhesive composition comprises the group of (poly)cyanoacrylate, in particular methyl cyanoacrylate, ethyl cyanoacrylate or combinations thereof.

[0035] In a preferred embodiment of the method according to the invention, the production of the at least partial adhesive bond in step g) is carried out within less than 120 s, preferably less than 90 s, particularly preferably less than 60 s, most particularly preferably less than 30 s.

[0036] In a further embodiment, the at least partial adhesive bond is produced in step g) without applying a reaction temperature, in particular without an additional heating step. In particular, the application of a reaction temperature means that heat is applied to the area of ​​the adhesive bond, for example, using a hot air blower, an infrared radiator, a UV lamp, an induction device, a conductive heating device, a gas or electric furnace, or a combination thereof, and / or that the heat originates from an upstream process, for example, a painting process.

[0037] In a preferred embodiment of the invention, in a further step h), the stabilizer adhesive bearing arranged on the stabilizer in step g) by producing at least one adhesive connection is removed from the at least one clamping device. Short description of the drawings

[0038] The stabilizer adhesive bearing according to the invention is explained using the drawing. Fig. 1 shows schematically a three-dimensional view of the stabilizer adhesive bearing in the relaxed state according to an embodiment of the invention.

[0039] In the Fig. 1 An embodiment of a stabilizer adhesive bearing 1 is shown in a relaxed state with an annular sleeve 2, which in this case consists of two halves. The annular sleeve 2 comprises an elastic inner contour with a three-dimensionally structured surface 3. Industrial applicability

[0040] Stabilizer adhesive bearings and vehicle stabilizers comprising at least one coaxially arranged stabilizer adhesive bearing of the type described above are used in the production of motor vehicles, in particular of the chassis of motor vehicles. List of reference symbols

[0041] 1 = Stabilizer adhesive bearing 2 = Ring-shaped sleeve 3 = Three-dimensional structured surface

Claims

1. A stabilizer adhesive bearing (1) for a vehicle stabilizer, wherein the stabilizer adhesive bearing (1) comprises at least one annular sleeve (2) having a resilient inner contour for coaxial arrangement on the vehicle stabilizer, the resilient inner contour of the at least one annular sleeve (2) comprises at least on the side facing the vehicle stabilizer a three-dimensionally structured surface (3) with an adhesive receiving volume, characterized in that the three-dimensionally structured surface (3) has a maximum roughness depth (Rmax) greater than 45 µm and a core roughness depth (RK) of at least 65% relative to the maximum roughness depth (Rmax) of the three-dimensionally structured surface (3), wherein the maximum roughness depth (Rmax) is the total of the reduced tip height (Rpk), the core roughness depth (RK) and the reduced groove depth (Rvk), wherein the reduced tip height (Rpk), the reduced groove depth (Rvk) and the core roughness depth (RK) are determined in accordance with EN ISO 13565-2: December 1997, wherein the at least one annular sleeve (2) further comprises in a longitudinal direction of the vehicle stabilizer at least a first sealing element which is arranged at one end of the at least one annular sleeve (2) and at least one additional sealing element which is arranged at the other end of the at least one annular sleeve (2).

2. A method for forming a stabilizer adhesive bearing (1) as claimed in claim 1 on a vehicle stabilizer, in particular for producing torsion rod shoulder bearings for motor vehicles, comprising the steps of: a) providing a stabilizer having a covering face for arranging a stabilizer adhesive bearing (1); b) providing the stabilizer adhesive bearing (1) comprising at least one annular sleeve (2) having a resilient inner contour at least on the side which faces the vehicle stabilizer, wherein the resilient inner contour comprises a three-dimensionally structured surface (3) having an adhesive receiving volume, wherein the three-dimensionally structured surface (3) has a maximum roughness depth (Rmax) greater than 45 µm and a core roughness depth (RK) of at least 65% relative to the maximum roughness depth (Rmax) of the three-dimensionally structured surface (3), wherein the maximum roughness depth (Rmax) is the total of the reduced tip height (Rpk), the core roughness depth (RK) and the reduced groove depth (Rvk), wherein the reduced tip height (Rpk), the reduced groove depth (Rvk) and the core roughness depth (RK) are determined in accordance with EN ISO 13565-2: December 1997; c) providing at least one assembly device; d) providing at least one adhesive composition; e) at least partially pretreating the three-dimensionally structured surface (3) of the stabilizer adhesive bearing (1) which is provided in step b) and / or the covering face for arranging the stabilizer adhesive bearing (1) of the stabilizer which is provided in step a) with the at least one adhesive composition which is provided in step d); f) arranging the at least one stabilizer adhesive bearing (1) which is provided in step b) or which is at least partially pretreated in step e) in the at least one assembly device which is provided in step c); g) arranging the stabilizer which is provided in step a) in the stabilizer adhesive bearing (1) in the assembly device which is arranged in step f) so as to produce an at least partial adhesive connection between the three-dimensionally structured surface (3) which is at least partially pretreated in step e) and / or the covering face which is at least partially pretreated in step e).

3. The method as claimed in claim 2, characterized in that the sequence of the steps e) to f) may be freely selected.

4. The method as claimed in one of claims 2 to 3, characterized in that the arrangement in step f) is carried out with pretensioning of the at least one stabilizer adhesive bearing (1).

5. The method as claimed in one of claims 2 to 4, characterized in that the production of the at least partial adhesive connection in step g) is carried out within less than 120 sec., preferably less than 90 sec., particularly preferably less than 60 sec., very particularly preferably less than 30 sec.

6. The method as claimed in one of claims 2 to 5, characterized in that the production of the at least partial adhesive connection in step g) is carried out without any supply of reaction temperature, in particular without an additional heating step.

7. The method as claimed in one of claims 2 to 6, characterized in that in an additional step h) the stabilizer adhesive bearing (1) which is arranged in step g) on the stabilizer while producing at least one adhesive connection is removed from the at least one assembly device.

8. A vehicle stabilizer comprising at least one coaxially arranged stabilizer adhesive bearing (1) having at least one annular sleeve (2) having a resilient inner contour as claimed in claim 1.

9. A vehicle stabilizer comprising at least one coaxially arranged stabilizer adhesive bearing (1) which is formed as claimed in one of claims 2 to 7.