Bearing arrangement with connection structure and bearing bush

Abstract

Storage arrangement, comprising a connection structure (10) and a bearing bush (2) with a first axial side (2a) and a second axial side (2b), wherein a central longitudinal axis (Z) projects through the bearing bush (2), comprising a core (4), an outer sleeve (6) surrounding the core (4), and an elastomer body (8) arranged between the core (4) and the outer sleeve (6) and connecting the core (4) and the outer sleeve (6) to one another, wherein - the outer sleeve (6) has a shaft section (6a) and a collar section (6b) on the first axial side (2a), - wherein the collar section (6b) extends radially outwards when viewed longitudinally, - wherein the outer sleeve (6) has a transition section (6c) which is arranged between the shaft section (6a) and the collar section (6b), - wherein the transition section (6c) extends longitudinally between a first boundary point (G1) and a second boundary point (G2), - wherein the first limit point (G1) is defined by a first tangent (T1) adjacent to the outer sleeve (6), which is inclined by 15° relative to a first transverse axis (Q1) in the direction of the shaft section (6a), - wherein the second limit point (G2) is defined by a second tangent (T2) adjacent to the outer sleeve (6), which is inclined by 60° relative to a second transverse axis (Q2) in the direction of the shaft section (6a), - wherein, viewed longitudinally, the elastomer body (8) has a collar elastomer track height (KH) defined by the diameter of an imaginary maximum circle between, on the one hand, the core (4) and / or the connecting structure (10) and, on the other hand, the transition section (6c), - wherein, viewed longitudinally, the length of the transition section (6c) corresponds to at least 0.5 times the collar elastomer track height (KH), - wherein the elastomer body (8) has an axial contact surface (8a) on the first axial side (2a), at least during axial compression relative movement between the core (4) and the outer sleeve (6), which contact surface rests against the connection structure (10), - wherein, viewed longitudinally, the axial contact surface (8a) has, at least during axial compression relative movement between the core (4) and the outer sleeve (6), an outer radial contact limit point (A) which defines an outer radial limit of the axial contact surface (8a) resting on the connecting structure (10), - wherein the elastomer body (8) in the unloaded state of the bearing bush (2) has an elastomer volume (8b) between, on the one hand, the core (4) and / or the connecting structure (10) and, on the other hand, the transition section (6c), - wherein, during axial compression relative movement between the core (4) and the outer sleeve (6), elastomer of the elastomer body (8) can be displaced in the direction of the first axial side (2a), so that an axial stop (8d) is formed and / or enlarged, whereby the axial contact surface (8a) increases in size with increasing axial compression load and the contact limit point (A) is displaced radially outwards, - wherein, viewed longitudinally, the elastomer volume (8b) is delimited by the transition section (6c), a first normal vector (N1) located at the first boundary point (G1) on the outer sleeve (6), a second normal vector (N2) located at the second boundary point (G2) on the outer sleeve (6), and an elastomer volume boundary (8c) running parallel to the transition section (6c) or following the transition section (6c), - wherein, viewed longitudinally, an elastomer volume height (VH) between the transition section (6c) and the elastomer volume boundary (8c) is at least 0.3 times the collar elastomer track height (KH), - wherein during the axial deflection relative movement between the core (4) and the outer sleeve (6), displaced elastomer deflects in such a way that it bears against the connecting structure (10) as an axial stop, wherein with increasing deflection the axial contact surface (8a) enlarges in the radial direction (R) starting from the core (4).

Description

[0001] The invention relates to a bearing arrangement according to claim 1 and a method for operating the bearing arrangement according to claim 8.

[0002] Elastomeric bearing bushes are known from practice, which have a core, a peripheral outer sleeve and an elastomer body which elastically connects the core and the outer sleeve.

[0003] EP 2 020 527 A2, for example, describes a bearing bush with a longitudinal axis, the outer sleeve of which has a collar. It also discloses a core and an elastomeric spring body between the core and outer sleeve. An elastomeric axial stop buffer is vulcanized onto the collar of the outer sleeve, which comes into contact with a connecting structure during axial compression (core and outer sleeve move relative to one another in the axial direction). The axial stop buffer is present regardless of the load situation. The connecting structure can bear against the core end face and be screwed to the core. The axial stop buffer does limit the axial adjustment travel and results in a bearing bush that is strongly progressive in the axial direction.However, axial compression and a superimposed torsional movement (core and outer sleeve rotate relative to each other around their longitudinal axis) can lead to a relative movement between the axial stop buffer and the connecting structure while the axial stop buffer is in contact with the connecting structure. This relative movement carries the risk of noise, particularly due to so-called stick-slip movements of the axial stop buffer. Stick-slip movement occurs when the axial stop buffer is deflected according to the torsional movement and, after a slight deformation, detaches from the connecting structure and springs back. This repetitive sticking and loosening causes disturbing noises and can lead to tribological wear.

[0004] A bearing bush is also already known from CN 1 02 966 691 A, which together with a connecting structure represents a bearing arrangement.

[0005] The object of the invention is to provide a bearing arrangement comprising a bearing bush which has a progressive axial stop characteristic and prevents noise generation, in particular squeaking, between the elastomeric axial stop and the connecting structure under torsional load.

[0006] This problem is solved by the invention.

[0007] The invention relates to a bearing arrangement comprising a connecting structure and a bearing bush having a first axial side and a second axial side, wherein a central longitudinal axis projects through the bearing bush, the bearing bush comprising a core, an outer sleeve surrounding the core, and an elastomer body which is arranged between the core and the outer sleeve and connects the core and the outer sleeve to one another.

[0008] According to the invention it is provided that - the outer sleeve has a shaft section and a collar section on the first axial side, - the collar section extends radially outwards when viewed longitudinally, - wherein the outer sleeve has a transition section arranged between the shaft section and the collar section, - wherein the transition section extends longitudinally between a first boundary point and a second boundary point, - wherein the first limit point is defined by a first tangent adjacent to the outer sleeve, which is inclined by 15° relative to a first transverse axis in the direction of the shaft section and / or in the direction of the second axial side, - wherein the second limit point is defined by a second tangent adjacent to the outer sleeve, which is inclined by 60° with respect to a second transverse axis in the direction of the shaft section and / or in the direction of the second axial side, - wherein, viewed longitudinally, the elastomer body has a collar elastomer track height defined by the diameter of an imaginary maximum circle between, on the one hand, the core and / or the connection structure and, on the other hand, the transition section, - where, viewed longitudinally, the length of the transition section corresponds to at least 0.5 times the collar elastomer track height, - wherein the elastomer body has an axial contact surface on the first axial side, at least during axial compression relative movement between the core and the outer sleeve, which contact surface rests against the connection structure, - wherein, viewed longitudinally, the axial contact surface has, at least during axial compression relative movement between core and outer sleeve, a contact limit point on the outer radial side, which defines an outer radial limit of the axial contact surface adjacent to the connecting structure, - wherein the elastomer body in the unloaded state of the bearing bush has an elastomer volume between, on the one hand, the core and / or connection structure and, on the other hand, the transition section, - whereby, during axial compression relative movement between the core and the outer sleeve, the elastomer of the elastomer body can be displaced in the direction of the first axial side, so that an axial stop is formed and / or enlarged, whereby the axial contact surface increases with increasing axial compression load and the contact limit point is shifted radially outwards, - wherein, viewed longitudinally, the elastomer volume is bounded by the transition section, a first normal vector located at the first boundary point on the outer sleeve, a second normal vector located at the second boundary point on the outer sleeve, and an elastomer volume boundary running parallel to the transition section or following the transition section, - where, viewed longitudinally, an elastomer volume height between the transition section and the elastomer volume boundary is at least 0.3 times the collar elastomer track height, - during the axial compression relative movement between the core and the outer sleeve, displaced elastomer deflects in such a way that it acts as an axial stop on the connecting structure, with the axial contact surface increasing in the radial direction starting from the core with increasing compression.

[0009] During the axial compression relative movement between the core and outer sleeve (core and outer sleeve move in the axial direction relative to one another, for example, the outer sleeve is adjusted towards the connecting structure; a load case exists), the elastomer body is pressurized, in the case of a core collar and / or a core thickening, in particular in the area between the collar section and / or transition section on the one hand and the core collar or core thickening and / or connecting structure on the other. The pressurization leads to the displacement of elastomer. The inventive design of the transition section serves to displace and guide the displaced elastomer. The transition section can also be referred to as a guide section. By guiding the displaced elastomer of the elastomer body, the latter can form and / or enlarge a defined axial stop.

[0010] It is conceivable that the core has a core collar and / or a core thickening on the first axial side. The core collar and / or core thickening can extend outward in the radial direction. The core collar and / or core thickening can serve to increase the pressure in the elastomer body during the axial relative deflection movement, thereby generating a displacement effect.

[0011] According to the invention, several aspects work together combinatorially to solve the aforementioned problem.

[0012] Firstly, the transition section is designed such that it has a significant length from the first boundary point to the second boundary point. Each of the two boundary points is located at the point of contact between the respective tangent and the outer sleeve. This length is defined by the collar elastomer track height. If necessary, if the transition section does not have a straight course, it can also be conceptually unfolded to form a straight line. It has been recognized that regions with small radii or short lengths, as are common in the prior art, do not serve to satisfactorily conduct displaced elastomer. In addition, the transition section has, for example, a curved / tilted / oblique course with respect to the central longitudinal axis. The course is defined by the two boundary points between which the transition section runs. The two boundary points are the bilateral boundaries of the transition section.It has also been recognized that areas with small radii, as are common in the state of the art, do not serve to conduct displaced elastomer satisfactorily, even with regard to their course.

[0013] Second, sufficient elastomer material is present at the transition section, defined by the elastomer volume located there. Viewed longitudinally, the elastomer volume can fill the area between the transition section, the first normal vector, the second normal vector, and the elastomer volume boundary in order to advantageously place as much elastomer material as possible there. The elastomer volume can be a section of the elastomer body. The elastomer volume can be completely filled with elastomer of the elastomer body. This serves to provide a suitable amount of elastomer material to form and / or enlarge the axial stop. The elastomer body therefore has a sufficient thickness on the transition section, which serves to form and / or enlarge the elastomeric axial stop. The elastomer volume height of at least 0.3 times the collar elastomer track height allows for a sufficient amount of elastomer material.Such an elastomer volume height also serves to prevent a critical degree of shear in the elastomer body and its adhesion zone to the outer sleeve during axial compression relative movement between the core and outer sleeve. It is conceivable that the elastomer volume height corresponds to at least 0.5 times the collar elastomer track height, although this leads to a more pronounced effect.

[0014] The inventive combination of the transition section and the elastomer volume results in the displaced elastomer deflecting during the relative axial deflection movement between the core and outer sleeve, forming an axial stop against the connecting structure. With increasing deflection, the axial contact surface expands radially from the core. Therefore, the contact limit point also shifts radially outward. This process is reversible. Since the elastomer axial stop changes (develops and / or expands) according to the relative deflection movement, it can be referred to as a load-dependent or dynamic axial stop.

[0015] The inventive combination of the transition section and the elastomer volume also leads to adverse relative movements occurring when wrinkles form in the elastomer. Therefore, squeaking and / or tribological wear between the axial stop and the connecting structure is reduced or at least prevented. Such elastomer wrinkles can form between the core and outer sleeve during the axial compression relative movement, with the relative movement in the wrinkles being promoted by a torsional movement (core and outer sleeve twisting relative to each other around their longitudinal axis).

[0016] The first axial side of the bearing bush can face the connecting structure. The connecting structure can provide a surface for the axial stop to rest against. The connecting structure can be a separate component from the bearing bush, whereby the connecting structure can be a car body, for example. The bearing bush can be connected to the connecting structure, for example by screwing. The core can bear against the connecting structure, preferably its core collar or core thickening, whereby the axial stop can also bear there depending on the design and load case. The imaginary circle can be arranged entirely between the core and / or the connecting structure on the one hand and the transition section on the other, whereby this serves to suitably define the collar elastomer track height.For example, depending on the geometric design of the outer sleeve and / or core in the area of the imaginary circle, only one diameter can be arranged entirely between the core and / or the connecting structure on the one hand and the transition section on the other. In the latter case, the imaginary circle can therefore also intersect the outer sleeve and / or core. This sometimes makes it possible to provide a larger quantity of elastomer material to form and / or enlarge the axial stop. The collar elastomer track height corresponds to the diameter of the imaginary circle. The imaginary circle with the maximum possible diameter is present when the bearing bush is unloaded. The axial stop can be the part of the elastomer body that projects beyond the shaft section and / or the collar section in the axial direction and forms the axial contact surface.The shaft section can be used for attachment to another component, for example by attaching the component to it on the outer circumference. The shaft section can extend from the transition section or the second boundary point to the end of the outer sleeve on the second axial side. The elastomer body can directly connect the core and the outer sleeve to one another, preferably being connected to one or both by vulcanization. The axial direction can run along the central longitudinal axis. The respective transverse axis runs perpendicular to the central longitudinal axis. The respective tangent is a tangent of the outer sleeve. The core collar or the core thickening extend radially outwards and / or can comprise the core end face, at least partially. The bearing bush can comprise a single elastomer body, wherein it advantageously fulfills the functions of elastic mounting and elastic stop.Therefore, multiple elastomer bodies are not necessary.

[0017] It is conceivable that the elastomer body does not have an axial stop in the unloaded state. In this case, an axial stop can be formed during the relative axial deflection movement. It is also possible that after the axial stop has been formed, this axial stop can also be enlarged. Alternatively, however, it is also conceivable that the elastomer body already has an axial stop in the unloaded state. In this case, the axial stop can be enlarged during the relative axial deflection movement. In any case, however, at least one axial stop can increasingly bear against the connecting structure with increasing axial deflection of the core and outer sleeve.

[0018] The bearing bush is generally described in the unloaded state, with specific loading cases noted separately. The unloaded state is defined as the installation position of the bearing bush on the connecting structure in the bearing arrangement without external loads.

[0019] According to a conceivable development of the invention, the bearing bush can be free of a load-independent or static elastomeric axial stop, at least on the first axial side. Such a load-independent or static axial stop, in contrast to the load-dependent or dynamic axial stop, has a constant amount of elastomer, completely independent of the respective load situation. This can advantageously prevent adverse noise generation and / or tribological wear.

[0020] According to a conceivable development of the invention, the collar elastomer track height can be at least 2 mm. This value, in combination with the design of the transition section, has proven advantageous in providing a sufficient amount of elastomer material to form and / or enlarge the axial stop.

[0021] According to an advantageous development of the invention, the bearing bush can exclusively form / have an axial stop into which elastomer of the elastomer body can be displaced. The axial stop can be annular, preferably a closed annular one. This creates an axial stop that runs circumferentially with respect to the central longitudinal axis and provides particularly good self-support. This enables high progression.

[0022] According to an advantageous development of the invention, the bearing bush can form / have a plurality of axial stops into which elastomer of the elastomer body can be displaced. In the event that a closed annular axial stop is not possible / not appropriate / undesirable, a plurality of axial stops, preferably adjacent to one another in the circumferential direction with respect to the central longitudinal axis, serve to adjust different stiffnesses in the axial direction.

[0023] According to an advantageous development of the invention, the at least one axial stop can form or enlarge with increasing relative spring deflection movement between the core and outer sleeve. The at least one axial stop can also disappear or at least become smaller with decreasing relative spring deflection movement between the core and outer sleeve. The technical means for forming and / or enlarging the axial stop are mentioned above. The design of the elastomer body, in particular the elastomer volume, and / or the transition section can advantageously be used to adjust the axial spring deflection travel at which the axial stop begins to form and / or enlarge.

[0024] According to an advantageous development of the invention, a radial distance between the contact limit point and the central longitudinal axis can be greater, at least during a relative compression movement between the core and outer sleeve, than a radial distance between the shaft section or the second limit point and the central longitudinal axis. This allows a sufficiently large axial stop to be realized, which can also sufficiently cover the shaft section in the axial direction. The axial stop can be defined by a radial distance between the contact limit point and the central longitudinal axis being greater than a radial distance between the shaft section or the second limit point and the central longitudinal axis. An overlap distance then forms between the two radial distances.

[0025] According to an advantageous development of the invention, a radial distance between the contact limit point and the central longitudinal axis in the unloaded state of the bearing bush can be greater than or at least equal to a radial distance between the shaft section or the second limit point and the central longitudinal axis. The contact limit point is thus always rearwardly supported in the axial direction by the collar section or transition section. Thus, even in the unloaded state, an advantageous elastomeric axial overlap or at least axial equilibrium can be achieved. The at least one axial stop can then be formed / enlarged considerably more quickly because, during relative compression movement, elastomer pressure can already build up in the area of the core collar or the core thickening in order to displace elastomer towards the second axial side.

[0026] According to a conceivable development of the invention, the length of the transition section can correspond to at least 0.8 times or even at least 1.0 times the collar elastomer track height. This can enable a significant formation and / or increase of the axial overlap during relative spring deflection.

[0027] According to a conceivable development of the invention, the elastomer body can have a wedge region or a stepped region on the first axial side, preferably on the outer circumference, in the unloaded state. The wedge region serves to prevent or at least minimize the formation of wrinkles during the formation and / or enlargement of the elastomer axial stop. The stepped region advantageously leads to the formation of a defined fold during the formation and / or enlargement of the elastomer axial stop, whereby irregular and / or arbitrary formation of wrinkles can be prevented. In addition, the stepped region initially enables a large compression travel without the axial stop also being formed and / or enlarged during initial compression.

[0028] According to an advantageous development of the invention, the elastomer volume and the feature according to which, viewed longitudinally, the elastomer volume height between the transition section and the elastomer volume boundary is at least 0.3 times the collar elastomer track height, viewed cross-sectionally over a cumulative circumference relative to the central longitudinal axis of at least 120°, preferably at least 180°, more preferably 360°, can be realized or realizeable. The elastomer body can have multiple regions, preferably arranged equidistantly around the central longitudinal axis, each of which realizes the feature. However, it can also alternatively be realized by just a single region of the elastomer body. Even at 120°, a sufficient amount of elastomer material can be provided to form and / or enlarge the axial stop. At 180°, this effect is enhanced.At 360°, a particularly progressive behavior results, since individual elastomer areas can deflect in the circumferential direction, which a circumferential ring stop cannot do.

[0029] According to a conceivable development of the invention, the core can have a core collar and / or a core thickening on the first axial side, wherein the axial stop is arranged radially adjacent to the core or core collar and / or core thickening, at least during a relative deflection movement of the core and outer sleeve. It is conceivable that the axial stop can be supported against the core or core collar and / or the core thickening in the radial direction, at least during a relative deflection movement of the core and outer sleeve. Advantageously, the core end face, i.e. the end face of the core, and the axial contact surface can be directly adjacent to one another, at least during a relative deflection movement of the core and outer sleeve. The axial stop is arranged as far inward radially as possible, preferably on the core side. One advantage of such a bearing bush is the low torsional load of the axial stop.During a torsional movement between the core and outer sleeve, the axial stop experiences little or no relative movement relative to the connecting structure, at least in its inner radial area. Even at very large torsion angles, the relative movement of a stop located on the core side to the connecting structure is very small.

[0030] According to a conceivable development of the invention, the at least one axial stop can be vulcanized radially inside directly onto the core, at least during a relative deflection movement of the core and outer sleeve. The connection can be made at the same axial height. The axial stop, which may only form during deflection, can thus be vulcanized radially inside during the relative deflection movement, creating a strong core-side connection. This prevents relative movement between the axial stop and the core.

[0031] According to a conceivable development of the invention, the at least one axial stop can be arranged directly and in contact between, on the one hand, the collar section and / or transition section and, on the other hand, the connecting structure in the axial intermediate region thereof, at least during a relative compression movement of the core and outer sleeve. This allows the axial stop to always be supported on the outer sleeve.

[0032] According to the invention, a method for operating a bearing arrangement according to the invention is also proposed, comprising the following steps: - axial loading of the bearing bush so that the core and the outer sleeve move relative to each other in the axial direction and elastomer of the elastomer body is displaced towards the first axial side to form and / or enlarge the axial contact surface, - torsional loading of the bearing bush so that the core and the outer sleeve rotate relative to each other around the central longitudinal axis, - where the axial and torsional loading takes place simultaneously or at least overlapping in time.

[0033] The advantages described above with regard to the bearing arrangement also apply analogously to the method, although reference is made to this to avoid repetition. Advantageously, the bearing is subjected not only to axial but also to torsional loading. During a torsional movement, the invention offers further advantages: If torsion occurs, the axial stop can rotate with the core and the connecting structure; no tribological wear or squeaking noises occur.

[0034] Further features, details, and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. They show: Fig. 1a a known bearing bush of the first design in unloaded condition, Fig. 1b a known bearing bush of the second design in unloaded condition, Fig. 2a a bearing bush according to the invention of the first embodiment in an unloaded state, Fig. 2b the bearing bush Fig. 2a in the first load state, Fig. 2c the bearing bush Fig. 2a in second load condition, Fig. 2d a detailed view IId of the bearing bush according to Fig. 2a, Fig. 3a a bearing bush according to the invention of a second embodiment in an unloaded state, Fig. 3b the bearing bush Fig. 3a in the first load state, Fig. 3c the bearing bushing Fig. 3a in second load condition and Fig. 4 a bearing bush according to the invention of a third embodiment in an unloaded state.

[0035] In the figures, identical or corresponding elements are each designated by the same reference numerals and are therefore not described again unless expedient. Features already described are not described again to avoid repetition and are applicable to all elements with identical or corresponding reference numerals, unless explicitly excluded. The disclosures contained in the entire description are analogously transferable to identical parts with identical reference numerals or identical component designations. The positional information chosen in the description, such as top, bottom, side, etc., also relates to the directly described and illustrated figure and, in the event of a change in position, is to be transferred analogously to the new position.Furthermore, individual features or combinations of features from the different embodiments shown and described can also represent independent, inventive or inventive solutions.

[0036] The Fig. 1a and Fig. 1b each show a bearing bush 102 known from practice in an unloaded state in longitudinal section, which is bolted to a connecting structure 110, for example a body of a motor vehicle. A central longitudinal axis Z extends through the bearing bushes 102. The bearing bushes 102 each comprise a core 104, wherein the bearing bush 102 is made of Fig. 1a has a core collar 104a of the core 104 on the connection structure side, whereas the bearing bush 102 of Fig. 1b, on the connection structure side, has a core thickening 104b of the core 104. On the outer circumference side, each of the bearing bushes 102 has an outer sleeve 106 that surrounds the core 104. The outer sleeve 106 has a shaft portion 106a that extends along the core 104 and a collar portion 106b that projects radially outward therefrom. An elastomer body 108 is arranged in the radial intermediate region of each of these, which elastically connects the core 104 to the outer sleeve 106.

[0037] Such known bearing bushings 102 are typically provided with an elastomeric stop pad 109 on the collar portion 106b for axial loads to absorb high loads. The stop pads 109 are generally arranged separately from the elastomer body 108 between the core 104 and the outer sleeve 106, although an elastomer skin or an elastomer area may be present between them, which is usually a manufacturing requirement but is of no use for the elastic or cushioning behavior of the bearing bushing 102: only with very large compression travels could such surfaces with an elastomer skin act as a barely elastic end stop to finally limit the compression travel. The stop cushion 109 is usually located quite far outward radially and comes into contact with the connecting structure 110 during axial compression (core 104 and outer sleeve 106 move in the axial direction relative to each other). The stop cushion 109 is present regardless of the load situation.

[0038] Conventional bearing bushes 102 have a simple fillet with a relatively small radius between the shaft section 106a and the collar section 106b. This fillet therefore also has a short length between two limit points G1 and G2. The limit points G1, G2 can be located as follows to determine the length of the fillet. The first limit point G1 corresponds to the point of contact between a first tangent T1, which bears against the outer sleeve 106, and the outer sleeve 106. The first tangent T1 forms an angle W1 of 15° with a first transverse axis Q1, which runs perpendicular to the central longitudinal axis Z. The second limit point G2 corresponds to the point of contact between a second tangent T2, which bears against the outer sleeve 106, and the outer sleeve 106. The second tangent T2 forms an angle W2 of 60° with a second transverse axis Q2, which runs perpendicular to the central longitudinal axis Z.

[0039] If, under adverse weather conditions, typically cold and wet, axial compression causes contact between the stop pad 109 and the connecting structure 110, accompanied by a simultaneous rotational movement between the core 104 and the outer sleeve 106, an annoying noise is generated, also perceived as a squeaking sound. A so-called stick-slip effect occurs when the stop pad 109 is deflected according to the rotational movement and, after a slight deformation, detaches and springs back. This repeated adhesion and detachment causes annoying noises.

[0040] In the Fig. 2a to 2c and 3a to 3c show a bearing arrangement in longitudinal section in three different states. Fig. 2a / 3a shows an unloaded state. Fig. 2b / 3b shows a compressed state and Fig. 2c / 3c shows an even more compressed state. For visualization purposes, the Fig. 2b / 3b and 2c / 3c not all reference symbols Fig. 2a / 3a are also shown, although the respective features are also shown and visible there. Fig. 2d shows a detailed view IId from Fig. 2a. In the Fig. 2a to 4 only one half of the respective bearing bush 2 is shown with respect to the central longitudinal axis Z.

[0041] The storage arrangement of the Fig. 2a to 2d comprises a connection structure 10 and a bearing bush 2, which are connected to one another, for example, by screwing. The connection structure 10 is a separate component from the bearing bush 2 and provides a surface 10a for the engagement of an axial stop 8d. A central longitudinal axis Z extends through the bearing bush 2 in its longitudinal direction. Three transverse axes Q1, Q2, Q3 are drawn perpendicular to this axis. The bearing bush 2 has a first axial side 2a, which faces the connection structure 10, and a second axial side 2b.

[0042] In the course of Fig. 2a to 2c, the core 4 is deflected relative to the outer sleeve 6 by an axial deflection relative movement between core 4 and outer sleeve 6, recognizable by the change in position between core 4 and third transverse axis Q3.

[0043] The bearing bush 2 comprises a core 4, which has a core collar 4a and a core end face 4c on the first axial side 2a. The bearing bush 2 rests against the connection structure 10 via the core end face 4c.

[0044] The bearing bush 2 also comprises an outer sleeve 6 that surrounds the core 4 on the outer circumference. The outer sleeve 6 has at least three sections, namely a shaft section 6a that extends along the core 4, a collar section 6b on the first axial side 2a, and a transition section 6c that is arranged between the shaft section 6a and the collar section 6b. The collar section 6a extends outward in the radial direction R. The transition section 6c borders the shaft section 6a and the collar section 6b. The transition section 6c has a defined length that extends from the first boundary point G1 to the second boundary point.

[0045] The first limit point G1 corresponds to the point of contact between a first tangent T1, which bears against the outer sleeve 6, and the outer sleeve 6. The first tangent T1 forms an angle W1 of 15° with the first transverse axis Q1 and is inclined in the direction of the shaft section 6a or in the direction of the second axial side 2b. The second limit point G2 corresponds to the point of contact between a second tangent T2, which bears against the outer sleeve 6, and the outer sleeve 6. The second tangent T2 forms an angle W2 of 60° with the second transverse axis Q2 and is inclined in the direction of the shaft section 6a or in the direction of the second axial side 2b. Fig. 2a to 3c, the transition section 6c has a tendency to be tilted or oblique with respect to the central longitudinal axis Z.

[0046] An elastomer body 8 is arranged between the core 4 and the outer sleeve 6 and is firmly connected to both, for example, by vulcanization. The elastomer body 8 elastically connects the core 4 and the outer sleeve 6. In the unloaded state, the elastomer body 8 has an elastomer-filled wedge region 8e on the first axial side 2a.

[0047] The elastomer body 8 has a collar elastomer track height KH, which corresponds to the diameter of an imaginary maximum circle K between the core 4 on the one hand and the transition section 6c on the other. The circle K borders the core 4 and the transition section 6c. The length of the transition section 6c corresponds to at least 0.5 times the collar elastomer track height KH; in the example shown, the length corresponds approximately to 0.8 times the collar elastomer track height KH.

[0048] The elastomer body 8 also has an elastomer volume 8b between, on the one hand, the core 4 and / or connection structure 10 and, on the other hand, the transition section 6c. Viewed longitudinally, the elastomer volume 8b is delimited by the transition section 6c, a first normal vector N1 located at the first boundary point G1 on the outer sleeve 6, a second normal vector N2 located at the second boundary point G2 on the outer sleeve 6, and an elastomer volume boundary 8c running parallel to the transition section 6c or following the transition section 6c. The area delimited by 6c, N1, N2, and 8c is filled with elastomer. The height of this elastomer volume 8b, i.e., an elastomer volume height VH, between the transition section 6c and the elastomer volume boundary 8c is at least 0.3 times the collar elastomer track height KH.The elastomer volume 8b and the elastomer volume height VH of the minimum length of 0.3 times the collar elastomer track height KH can be realized cross-sectionally over a cumulative circumference with respect to the central longitudinal axis Z of at least 120°.

[0049] The elastomer body 8 further has an axial contact surface 8a on the first axial side 2a. The axial contact surface 8a has a contact limit point A, which defines an outer radial limit of the axial contact surface 8a resting on the connection structure 10. It can be seen that a radial distance between the contact limit point A and the central longitudinal axis Z is not greater than a radial distance between the shaft section 6a or the second limit point G2 and the central longitudinal axis Z. In the unloaded state, the bearing bush 2 therefore does not have an elastomeric axial stop 8d. However, it can also be seen that with axial relative deflection movement between the core 4 and the outer sleeve 6, elastomer of the elastomer body 8 is displaced towards the first axial side 2a, and the contact limit point A is shifted outwards in the radial direction R. An overlap distance D is created between the contact point A and the shaft section 6a or the second boundary point G2.The elastomer guided by the transition section 6c and displaced towards the first axial side 2a forms the axial stop 8d there and enlarges this with increasing axial deflection load. The axial stop 8d increasingly contacts the connection structure 10 with increasing axial deflection of the core 4 and outer sleeve 6. The elastomer guided by the transition section 6c and displaced towards the first axial side 2a forms the axial stop 8d there and enlarges this with increasing axial deflection load. The axial stop 8d projects beyond the shaft section 6a in the axial direction. The axial direction runs along the central longitudinal axis Z. The axial stop 8d is a load-dependent or dynamic axial stop. At the same time, the axial contact surface 8a resting against the connection structure 10 also enlarges.The axial stop 8d can decrease in size and disappear with decreasing relative deflection movement between core 4 and outer sleeve 6.

[0050] The axial stop 8d is arranged radially adjacent to the core 4 or its core collar 4a. The axial stop 8d is supported in the radial direction R against the core 4 or core collar 4a. The core end face 4c and the axial contact surface 8a are directly adjacent to one another, and the axial stop 8d is arranged as far inward radially as possible, in the example shown on the core side. It is also evident that the axial stop 8d is vulcanized directly onto the core radially. It is also evident that the axial stop 8d is arranged directly and in contact between, on the one hand, the collar section 6b and, on the other hand, the connection structure 10 in the axial intermediate region thereof.

[0051] The bearing bush 2 is free of a load-independent or static elastomeric axial stop.

[0052] Regarding the Fig. To avoid repetition, 3a to 3c should only show the differences to the Fig. 2a to 2c are described.

[0053] The core 4 now comprises a core thickening 4b instead of a core collar. Even in the unloaded state, an overlap distance D exists between the contact limit point A and the shaft section 6a or the second limit point G2. The elastomer body 8 already has an axial stop 8d in the unloaded state. This can be enlarged during the axial relative deflection movement. The elastomer body 8 has an elastomer-filled stepped area 8f on the first axial side 2a, shown here as an example in an L-shaped longitudinal section. A radial distance between the contact limit point A and the central longitudinal axis Z is already greater in the unloaded state of the bearing bush 2 than a radial distance between the shaft section 6a or the second limit point G2 and the central longitudinal axis Z.

[0054] With reference to Fig. 4, to avoid repetition, only the differences to the Fig. 2a to 2c are described.

[0055] Fig. Figure 4 shows an unloaded state of a third embodiment. The outer sleeve 6 now has a relatively large radius throughout from the shaft section 6a to the collar section 6b. The transition section 6c is therefore curved. The contact limit point A is located closer to the central longitudinal axis Z in the radial direction R than the shaft section 6a or the second limit point G2. An axial stop is not present in this embodiment in the unloaded state. With increasing deflection movement (not shown) of core 4 and outer sleeve 6, one forms as described above.

[0056] The invention is not limited to one of the above-described embodiments, but can be modified in many ways. All features and advantages apparent from the claims, the description, and the drawings, including structural details, spatial arrangements, and method steps, may be essential to the invention both individually and in a wide variety of combinations.

[0057] The scope of the invention includes all combinations of at least two of the features disclosed in the description, the claims and / or the figures.

[0058] To avoid repetition, features disclosed according to the device should also be considered as disclosed according to the method and be claimable. Likewise, features disclosed according to the method should also be considered as disclosed according to the device and be claimable. List of reference symbols 2 bearing bush 2a first axial side 2b second axial side 4 core 4a core collar 4b Nuclear thickening 4c core face 6 Outer sleeve 6a Shaft section 6b Collar section 6c transition section 8 elastomer bodies 8a Axial contact surface 8b Elastomer volume 8c Elastomer volume limit 8d axial stop 8th wedge area 8f step area 10 Connection structure 10a Area 102 bearing bush 104 core 104a core collar 104b Nuclear thickening 106 Outer sleeve 106a Shaft section 106b Collar section 109 stop pads 110 Connection structure A Investment limit point D Coverage distance G1 first boundary point G2 second boundary point K Circle KH collar elastomer track height N1 first normal vector N2 second normal vector Q1 first transverse axis Q2 second transverse axis Q3 third transverse axis R Radial direction T1 first tangent T2 second tangent VH elastomer volume height W1 first angle W2 second angle Z central longitudinal axis

Claims

[1] Storage arrangement, comprising a connection structure (10) and a bearing bush (2) with a first axial side (2a) and a second axial side (2b), wherein a central longitudinal axis (Z) projects through the bearing bush (2), comprising a core (4), an outer sleeve (6) surrounding the core (4), and an elastomer body (8) arranged between the core (4) and the outer sleeve (6) and connecting the core (4) and the outer sleeve (6) to one another, wherein - the outer sleeve (6) has a shaft section (6a) and a collar section (6b) on the first axial side (2a), - wherein the collar section (6b) extends radially outwards when viewed longitudinally, - wherein the outer sleeve (6) has a transition section (6c) which is arranged between the shaft section (6a) and the collar section (6b), - wherein the transition section (6c) extends longitudinally between a first boundary point (G1) and a second boundary point (G2), - wherein the first limit point (G1) is defined by a first tangent (T1) adjacent to the outer sleeve (6), which is inclined by 15° relative to a first transverse axis (Q1) in the direction of the shaft section (6a), - wherein the second limit point (G2) is defined by a second tangent (T2) adjacent to the outer sleeve (6), which is inclined by 60° relative to a second transverse axis (Q2) in the direction of the shaft section (6a), - wherein, viewed longitudinally, the elastomer body (8) has a collar elastomer track height (KH) defined by the diameter of an imaginary maximum circle between, on the one hand, the core (4) and / or the connecting structure (10) and, on the other hand, the transition section (6c), - wherein, viewed longitudinally, the length of the transition section (6c) corresponds to at least 0.5 times the collar elastomer track height (KH), - wherein the elastomer body (8) has an axial contact surface (8a) on the first axial side (2a), at least during axial compression relative movement between the core (4) and the outer sleeve (6), which contact surface rests against the connection structure (10), - wherein, viewed longitudinally, the axial contact surface (8a) has, at least during axial compression relative movement between the core (4) and the outer sleeve (6), an outer radial contact limit point (A) which defines an outer radial limit of the axial contact surface (8a) resting on the connecting structure (10), - wherein the elastomer body (8) in the unloaded state of the bearing bush (2) has an elastomer volume (8b) between, on the one hand, the core (4) and / or the connecting structure (10) and, on the other hand, the transition section (6c), - wherein, during axial compression relative movement between the core (4) and the outer sleeve (6), elastomer of the elastomer body (8) can be displaced in the direction of the first axial side (2a), so that an axial stop (8d) is formed and / or enlarged, whereby the axial contact surface (8a) increases in size with increasing axial compression load and the contact limit point (A) is displaced radially outwards, - wherein, viewed longitudinally, the elastomer volume (8b) is delimited by the transition section (6c), a first normal vector (N1) located at the first boundary point (G1) on the outer sleeve (6), a second normal vector (N2) located at the second boundary point (G2) on the outer sleeve (6), and an elastomer volume boundary (8c) running parallel to the transition section (6c) or following the transition section (6c), - wherein, viewed longitudinally, an elastomer volume height (VH) between the transition section (6c) and the elastomer volume boundary (8c) is at least 0.3 times the collar elastomer track height (KH), - wherein during the axial deflection relative movement between the core (4) and the outer sleeve (6), displaced elastomer deflects in such a way that it bears against the connecting structure (10) as an axial stop, wherein with increasing deflection the axial contact surface (8a) enlarges in the radial direction (R) starting from the core (4). [2] Bearing arrangement according to claim 1, characterized by that the bearing bush (2) exclusively forms or has one axial stop (8d) or several axial stops (8d) into which elastomer of the elastomer body (8) can be displaced. [3] Bearing arrangement according to claim 1 or 2, characterized bythat the axial stop (8d) can form or enlarge with increasing relative deflection movement between core (4) and outer sleeve (6) and the axial stop (8d) can disappear or decrease with decreasing relative deflection movement between core (4) and outer sleeve (6). [4] Bearing arrangement according to one of the preceding claims, characterized by that a radial distance between the contact limit point (A) and the central longitudinal axis (Z) is greater than a radial distance between the shaft section (6a) or the second limit point (G2) and the central longitudinal axis (Z), at least during a relative deflection movement between the core (4) and the outer sleeve (6). [5] Bearing arrangement according to one of the preceding claims, characterized bythat a radial distance between the contact limit point (A) and the central longitudinal axis (Z) in the unloaded state of the bearing bush (2) is greater than or at least equal to a radial distance between the shaft section (6a) or the second limit point (G2) and the central longitudinal axis (Z). [6] Bearing arrangement according to one of the preceding claims, characterized by that the elastomer volume (8b) and the feature according to which, viewed longitudinally, the elastomer volume height (VH) between the transition section (6c) and the elastomer volume boundary (8c) is at least 0.3 times the collar elastomer track height (KH), viewed cross-sectionally over a cumulative circumference with respect to the central longitudinal axis of at least 120°, preferably at least 180°, more preferably 360°, is realized or can be realized. [7] Bearing arrangement according to one of the preceding claims, characterized bythat the core (4) has a core collar (4a) and / or a core thickening (4b) on the first axial side (2a), wherein the axial stop (8d) is arranged radially adjacent to the core collar (4a) and / or the core thickening (4b) at least during a relative deflection movement of the core (4) and outer sleeve (6), preferably the axial stop (8d) is supported against the core collar (4a) and / or the core thickening (4b) at least during a relative deflection movement of the core (4) and outer sleeve (6) in the radial direction (R). [8] A method of operating a bearing arrangement according to any one of the preceding claims, comprising the following steps: - axial loading of the bearing bush (2) so that the core (4) and the outer sleeve (6) move relative to each other in the axial direction and elastomer of the elastomer body (8) is displaced in the direction of the first axial side (2a) to form and / or enlarge the axial contact surface (8a), - torsional loading of the bearing bush (2) so that the core (4) and the outer sleeve (6) rotate relative to each other around the central longitudinal axis (Z), - where the axial and torsional loading takes place simultaneously or at least overlapping in time.

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