Hydraulically damping bearing with ribs and rib interruption areas

Abstract

A hydraulically damping bearing (10) which is penetrated by a central longitudinal axis (Z), comprising a cage (20), an outer sleeve (30) and an axial locking means (40) for axially securing the outer sleeve (30) to the cage (20), characterized in that the axial locking means (40) comprises outer circumferential ribs (21) on the cage (20) and inner circumferential ribs (31) on the outer sleeve (30), which each extend in the circumferential direction (U) and can interlock, wherein the cage (20) forms at least two outer rib interruption areas (22) on its outer circumferential side and the outer sleeve (30) forms at least two inner rib interruption areas (32), such that during axial relative movement along the central longitudinal axis (Z) between the cage (20) and the outer sleeve (30), the outer circumferential ribs (21) are interrupted by the inner rib interruption areas (32) and the The inner circumferential ribs (31) are adjustable through the outer rib interruption areas (22).

Description

[0001] The invention relates to a hydraulically damping bearing according to claim 1.

[0002] Hydraulic bushings are known. They comprise a cage, which is usually embedded in elastomer, and an outer circumferential sleeve that is attached to the cage and secured in the axial direction.

[0003] In practice, it is known to slide a metallic sleeve over the cage and then calibrate it. During this calibration, the sleeve's diameter is reduced. A radial projection of the cage thereby creates an axial undercut. Alternatively, a metallic sleeve can be locally calibrated at its ends to grip the cage externally and thus create an axial undercut. The outer sleeve is therefore secured against axial slippage. Creating an axial undercut using a forming process requires a plastically deformable material for the outer sleeve. Therefore, this fixing method cannot be used for a plastic outer sleeve.

[0004] Alternatively, plastic outer sleeves are known which are fixed to a plastic cage by means of a welding process to prevent axial slippage. Such a construction is shown, for example, in EP 2 522 878 B1. However, welding the two components together initially requires a high investment in suitable welding equipment as well as very meticulous monitoring of the weld quality.

[0005] CN 1 14 857 204 A proposes a hydraulic bushing in which an inner cage is manufactured from aluminum by a casting process. A rubber body, which has an inner core, is arranged within this cage. An outer sleeve serves to enclose the hydraulic fluid, and stops at both ends secure the assembly and limit its axial play. The core has grooves on its outer circumference.

[0006] German patent application DE 10 2019 113 847 B3 proposes a bearing arrangement with a rubber-solid bearing. The rubber-solid bearing has an outer sleeve and an inner sleeve, with an elastomer material arranged between the outer and inner sleeves. This elastomer material is bonded to the inner and outer sleeves by vulcanization. The outer sleeve has circumferential recesses into which projections of a bearing bushing engage. The rubber-solid bearing is held in the sleeve by frictional interference through an interference fit, while the sleeve itself is positively locked in place by the engaging projections.

[0007] German patent application DE 10 2020 134 593 A1 discloses a hydraulic bushing in which a bearing core is arranged in an elastomer body with a vulcanized-in cage. The cage has end pieces connected by webs, which form circumferential support points on which an outer bushing is supported and which are subjected to preload.

[0008] In practice, it is also known that a plastic outer sleeve is screwed to a plastic cage. The thread provides axial fixation, but the thread itself does not create a seal between the plastic outer sleeve and the plastic cage, so additional circumferential seals are necessary. However, in order to transmit sufficiently high axial forces, the threads must be engaged several times to ensure a deep engagement. Consequently, the outer sleeve must be rotated / screwed several turns relative to the cage. This also places considerable stress on the seal. Furthermore, high torques are required for the screw connection, which must be transmitted to the relatively thin outer sleeve.

[0009] The object of the invention is therefore to create a hydraulically damping bearing that overcomes the aforementioned problems.

[0010] The main features of the invention are specified in the characterizing part of claim 1. Embodiments are the subject of claims 2 to 10.

[0011] According to the invention, a hydraulically damping bearing is proposed which is penetrated by a central longitudinal axis, comprising a cage, an outer sleeve and an axial locking means for axially securing the outer sleeve to the cage, wherein the axial locking means comprises outer circumferential ribs on the cage and inner circumferential ribs on the outer sleeve, which each extend in the circumferential direction and can interlock, wherein the cage forms at least two outer rib interruption areas on the outer circumferential side and the outer sleeve forms at least two inner rib interruption areas, so that in the case of axial relative movement along the central longitudinal axis between cage and outer sleeve the outer circumferential ribs are adjustable through the inner rib interruption areas and the inner circumferential ribs through the outer rib interruption areas.

[0012] The invention thus provides areas for axially sliding the ribs of the respective cage and outer sleeve parts along the central longitudinal axis. These interrupted areas allow the ribs of one part to axially slide past the ribs of the other part. This enables the outer sleeve to be easily slid onto the cage during assembly. The interrupted areas serve as axially extending feed zones. After the axial relative movement between the cage and outer sleeve, these two parts can be rotated relative to each other about the central longitudinal axis. This allows the inner and outer circumferential ribs to engage and abut each other, thus axially fixing the outer sleeve to the cage.

[0013] The ribs are arranged on the respective circumferential surfaces of the cage and outer sleeve and project radially from them. A valley forms between axially adjacent ribs, which follows the ribs circumferentially. A rib of the other part of the cage and outer sleeve can engage in this valley. The interruption zones can be free of ribs and / or be formed by a respective cylindrical circumferential surface of the cage and outer sleeve and / or be bounded circumferentially by the ends of the ribs. The valleys can open towards the corresponding interruption zone. It is conceivable that the circumferential length of all ribs between circumferentially adjacent interruption zones is identical. It is also conceivable that axially adjacent ribs are aligned with each other at one end, preferably at both ends, in the axial direction. This can result in axially extending feed zones.

[0014] The bearing also comprises an elastomer body and fluid-filled or fillable chambers, which are delimited by inflatable elastomer membranes. The cage is embedded in the elastomer body to reinforce the inflatable elastomer membranes. To prevent leakage from the fluid-filled chambers, they are sealed against the environment. For this purpose, the elastomer membranes can be coated with sealants that sit on top of the cage.

[0015] The invention therefore enables axial fixing of the outer sleeve in a surprisingly simple manner without reshaping it and without rotational movement over several complete revolutions.

[0016] According to a possible further development of the hydraulically damping bearing, at least one sealing element can be arranged between the cage and the outer sleeve. The axial relative movement of the cage and outer sleeve and / or the circumferential relative movement of the cage and outer sleeve can occur against the force of the sealing element, shearing and / or compressing it. The circumferential position of the cage and the outer sleeve relative to each other can be secured by the compressed and / or sheared sealing element. Each ring of the cage can carry a sealing element, preferably a sealing ring.

[0017] According to a possible further development of the hydraulically damping bearing, axially spaced ribs (e.g. outer circumferential ribs and / or inner circumferential ribs) arranged in the circumferential direction between two adjacent interruption areas can define a rib block.

[0018] According to a further development of the hydraulically damping bearing, the outer and inner rib interruption zones can each be circumferentially limited by the respective ribs and / or extend parallel to the central longitudinal axis. This allows the ribs, while within the interruption zone of the other part of the cage and outer sleeve, to easily transition from axial movement to engaging between the ribs of the other part of the cage and outer sleeve by means of a rotational movement. This creates a simple transition. The advantage of axially extending interruption zones is that axial relative movement of the cage and outer sleeve can be independent of circumferential movement. This significantly simplifies pre-assembly, and the sealing elements are subjected to minimal tribological stress and only slight shear forces due to tilting during axial relative movement.

[0019] According to a further development of the hydraulically damping bearing, the cage can have two, three, or four outer rib interruption zones, and the outer sleeve can have two, three, or four inner rib interruption zones. The number of interruption zones can depend on the diameter of the cage or the outer sleeve. An increase in diameter with a constant number of interruption zones results in a longer adjustment path when the cage and outer sleeve rotate relative to each other. Therefore, it is advantageous to link the outer diameter of the cage in the area of ​​the outer circumferential ribs with the number of outer rib interruption zones, and the same applies analogously to the outer sleeve.

[0020] According to a possible further development of the hydraulically damping bearing, the outer rib interruption areas and the inner rib interruption areas can each be arranged equidistantly in the circumferential direction. This allows the cage and outer sleeve to be pre-assembled in various orientations relative to each other, as multiple orientations are possible. This simplifies the assembly process.

[0021] According to a further development of the hydraulically damping bearing, at least two, preferably three, and more preferably four, outer circumferential ribs can be arranged between adjacent outer rib interruption zones, and / or at least two, preferably three, and more preferably four, inner circumferential ribs can be arranged between adjacent inner rib interruption zones. The specified numbers indicate the exact quantity, ensuring that no fewer and no more are present. With an increasing number of ribs, the axial force that can be transmitted by means of an interference fit between the outer sleeve and the receiving eye before reaching the yield strength of the ribs also increases.

[0022] According to a further development of the hydraulically damping bearing, the outer and inner circumferential ribs can either run circumferentially with zero pitch or form a thread. The ribs running circumferentially without a pitch (zero pitch) have no thread. Lacking such a pitch, they provide very high self-locking against loosening, but rotation of the cage and outer sleeve is more difficult. In contrast, the ribs in the threaded configuration have a thread-like pitch. In this case, the self-locking is less pronounced, but rotation of the cage and outer sleeve is simplified.

[0023] According to a possible further development of the hydraulically damping bearing, the number of threads can be one, or correspond to the number of interrupted outer rib sections or inner rib sections. In the first embodiment, the threads are single-start threads. This allows for a low pitch. This is particularly suitable for achieving both easy rotation of the cage and outer sleeve and very high self-locking of the threads. Furthermore, with the single-start thread, there is a negligible tolerance relationship between the axial and rotational position of the cage and outer sleeve. Multi-start threads can simplify assembly because, since a multi-start thread can have multiple entries, the cage and outer sleeve can be pre-assembled in different orientations relative to each other, as several orientations are possible.The number of inputs can correspond to the number of external rib interruption areas or internal rib interruption areas.

[0024] According to a possible further development of the hydraulically damping bearing, the outer rib interruption areas and / or inner rib interruption areas could be milled-free sections. Such areas could be recognizable by milling-typical surface features. Specifically, it is conceivable that ribs or threads are first formed completely closed in the circumferential direction, and then that defined sections of the ribs or threads are milled away to create the interruption areas. This eliminates the need for complex and costly manufacturing tools, such as injection molds with intricate slides, and / or that slides required for forming other areas do not need to be additionally coordinated with slides for the ribs to avoid geometric conflicts.

[0025] According to a further development of the hydraulically damping bearing, at least one of the outer circumferential ribs, preferably only one of the outer circumferential ribs, can be designed as a Poka-Yoke outer rib which extends beyond the axially adjacent outer circumferential rib in the circumferential direction, and at least one of the inner circumferential ribs, preferably only one of the inner circumferential ribs, can be designed as a Poka-Yoke inner rib which is recessed in the circumferential direction with respect to the axially adjacent inner circumferential rib.Additionally or alternatively, the reversed case is conceivable, whereby at least one of the outer circumferential ribs, preferably only one of the outer circumferential ribs, can be designed as a Poka-Yoke outer rib, which is recessed in the circumferential direction with respect to the axially adjacent outer circumferential rib, and whereby at least one of the inner circumferential ribs, preferably only one of the inner circumferential ribs, can be designed as a Poka-Yoke inner rib, which extends beyond the axially adjacent inner circumferential rib in the circumferential direction.

[0026] The two Poka-Yoke ribs together form an axial mechanism to prevent incorrect assembly. The cage and outer sleeve are then only axially adjustable relative to each other in a single orientation. The longer, protruding rib prevents other ribs from being pushed past it in the axial direction, or at least from being moved to the same height.

[0027] It is possible that all rib blocks, with the exception of those rib blocks featuring a poka-yoke rib, comprise identical ribs. This can be particularly true for their circumferential length, leading-in chamfers, and axial alignment.

[0028] According to a possible further development of the hydraulically damping bearing, the circumferential length of all ribs between circumferentially adjacent interruption areas, with the exception of the poka-yoke rib, can be identical. It is conceivable that axially adjacent ribs are aligned with each other in the axial direction at one end, preferably at both ends, but with the exception of the poka-yoke rib.

[0029] According to a further development of the hydraulically damping bearing, the cage or the outer sleeve can have a Poka-Yoke rotation direction stop against which a rib of the other part of the cage and outer sleeve can abut in the circumferential direction. This prevents the cage and outer sleeve from rotating in the wrong circumferential direction. The Poka-Yoke rotation direction stop forms a circumferential device to prevent incorrect assembly. The Poka-Yoke rotation direction stop can be a solid wall. In conjunction with the Poka-Yoke ribs, a multi-stage incorrect assembly prevention device is therefore enabled, because first, the Poka-Yoke ribs ensure the correct axial orientation during axial relative movement between the cage and outer sleeve, and second, the Poka-Yoke rotation direction stop ensures the correct direction of rotation during circumferential relative movement between the cage and outer sleeve.

[0030] According to a possible further development of the hydraulically damping bearing, the cage or the outer sleeve can have an over-rotation prevention device against which a rib of the respective cage and outer sleeve can come into contact in the circumferential direction. This prevents the cage and outer sleeve from over-rotating in the correct circumferential direction. The over-rotation prevention device can be a ramp structure extending radially. The over-rotation prevention device forms a circumferential mechanism to prevent incorrect assembly. In conjunction with the Poka-Yoke ribs and / or the Poka-Yoke rotation direction stop, a multi-stage incorrect assembly prevention system is therefore possible.

[0031] According to a possible further development of the hydraulically damping bearing, the cage or the outer sleeve can have an axial web which can form the Poka-Yoke rotation direction stop on one circumferential side and / or the over-rotation prevention device on its opposite circumferential side. This allows the axial web to be multifunctional.

[0032] According to a further development of the hydraulically damping bearing, one cage and outer sleeve can have at least one engagement recess, and the other cage and outer sleeve can have at least one corresponding engagement projection. The engagement recess and the engagement projection can correspond to each other. The engagement recess and the engagement projection can together form a rotation lock. For this purpose, the engagement projection can engage in the engagement recess to prevent unwanted circumferential loosening of the cage and outer sleeve during normal operation of the bearing. It is conceivable that the engagement projection engages in the engagement recess during the pre-assembly or assembly of the outer sleeve and cage due to the rotational movement.It is also conceivable that the projection only engages during the bearing's calibration when it is pressed in, for example, into a receiving eye, and that an engagement already present before pressing in, preferably a slight engagement, is reinforced by the pressing process and / or further secured against slippage. Advantageously, at least one engagement recess is arranged on a circumferential rib flank of an inner or outer circumferential rib.

[0033] According to a further development of the hydraulically damping bearing, the outer circumferential ribs and / or the inner circumferential ribs can each (only) form a lead-in chamfer at one or both ends. The lead-in chamfers serve to guide the ribs of one part of the cage and outer sleeve into the valleys between the ribs of the other part of the cage and outer sleeve. During circumferential relative movement between the cage and outer sleeve, the lead-in chamfers slide against each other. This also results in axial relative movement between the cage and outer sleeve, at least to a small extent. The circumferential relative movement, in conjunction with the lead-in chamfers, allows for the application of a very high holding force. This is particularly true for ribs without a threaded pitch. The lead-in chamfers can have a slope with respect to the central longitudinal axis.

[0034] It is conceivable that, with only one set of leading-in chamfers, the circumferentially opposite sides of each rib could form a rib stop. This would also prevent the cage and outer sleeve from twisting in the wrong circumferential direction. The rib stops of the outer circumferential ribs can abut against the rib stops of the inner circumferential ribs to prevent twisting.

[0035] With only one leading-in ramp present, the respective leading-in ramps can be positioned such that the leading-in ramps of the ribs of one part of the cage and outer sleeve can slide along the leading-in ramps of the ribs of the other part of the cage and outer sleeve. Viewed longitudinally, the leading-in ramps can run obliquely with respect to the central longitudinal axis. It is conceivable that the inner Poka-Yoke rib and / or the outer Poka-Yoke rib have only one leading-in ramp.

[0036] According to a possible further development of the hydraulically damping bearing, the cage can be a cast part, for example, an injection-molded plastic part or an aluminum die-cast part. It can be made of a plastic material, preferably a thermoplastic, and / or the outer sleeve can be made of a plastic material, preferably a thermoplastic. The invention makes it possible to axially secure the outer sleeve without deformation. It is therefore now possible to use a plastic material for the outer sleeve as well.

[0037] According to a further development of the hydraulically damping bearing, the circumferential length of the outer rib interruption zones can be at least 1 mm, preferably at least 2 mm, longer than the circumferential length of the inner circumferential ribs between adjacent inner rib interruption zones. Additionally, the circumferential length of the inner rib interruption zones can be at least 1 mm, preferably at least 2 mm, longer than the circumferential length of the outer circumferential ribs (U). It is conceivable that the interruption zones are at most 5 mm longer in the circumferential direction than the corresponding ribs.

[0038] It is conceivable that the inner and outer circumferential ribs are designed such that, when positioned in the corresponding interruption area of ​​the other part of the cage and outer sleeve, they can form a radial clearance of at least 1 mm, preferably at least 2 mm. It is also conceivable that the radial clearance is at most 5 mm. This clearance allows the cage and outer sleeve to be reliably slid axially into one another. A smaller clearance could require excessively high positioning accuracy during pre-assembly; however, an excessive clearance could reduce the axially securing surface of the ribs, thereby decreasing the maximum achievable axial force.

[0039] According to a possible further development of the hydraulically damping bearing, the cage can have two rings connected to each other by at least one web, wherein only one of the rings has the outer circumferential ribs and outer rib interruption areas, preferably formed integrally by the ring. If both rings were provided with outer circumferential ribs and outer rib interruption areas, a corresponding pair of inner ribs on the inner circumferential surface of the outer sleeve would have to pass through a large part of the core during pre-assembly or assembly of the outer sleeve. For this, it would be necessary, for example, to provide suitable clearances in the area between the rings as well.In such a case, it would be impossible, or only possible with additional effort, to axially position ring support elements, such as channel half-shells or other inserts, between the rings in such a way that they, together with the outer sleeve, form a fluid channel for the hydraulic function of the hydraulically damping bearing. Alternatively, the inner surface of the outer sleeve would have to be stepped, meaning that the rings with the ribs would have to have different diameters so that the ribs on the inside of the outer sleeve do not collide with the area between the ribs when the outer sleeve is slid on. In such a case, however, the bearing would have to accommodate the ring with the larger diameter within its installation space, which could tend to result in a larger overall bearing.

[0040] According to a possible further development of the hydraulically damping bearing, a rib block of outer circumferential ribs and / or inner circumferential ribs, preferably each rib block of outer circumferential ribs and / or inner circumferential ribs, can extend circumferentially over a maximum of 1 / 4 of the bearing's circumference. This reduces shear stresses and tribological abrasion of the sealant during rotation of the cage and outer sleeve.

[0041] According to a possible further development of the hydraulically damping bearing, a rib block of outer circumferential ribs and / or inner circumferential ribs, preferably each rib block of outer circumferential ribs and / or inner circumferential ribs, can have a developed length of at most 50 mm, preferably at most 30 mm. This reduces shear stresses and tribological abrasion on the sealant when the cage and outer sleeve twist.

[0042] According to a possible further development of the hydraulically damping bearing, the cage can carry elastomeric axial stops. These axial stops can extend in the axial direction and / or act in the axial direction. The axial stops can be interrupted in the circumferential direction, at least on one axial end face of the cage. They serve to cushion impacts against or from a component separate from the bearing. The axial stops can be formed axially at one end or at both ends of the cage. It is conceivable that the elastomer body itself forms the axial stops.

[0043] According to a possible further development of the hydraulically damping bearing, the rib blocks of outer circumferential ribs, preferably all rib blocks of outer circumferential ribs, can be axially aligned with an elastomeric axial stop, preferably arranged centered in the axial direction. This serves to improve force flow in the cage during cushioning and prevents a deflected force flow that could lead to damage to the cage.

[0044] 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. The drawings show: Fig. 1 a longitudinal sectional view through a bearing according to the invention, Fig. 2 a cage of the storage unit in isolation and Fig. 3 an outer sleeve of the bearing in isolation.

[0045] In the figures, identical or corresponding elements are designated with 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 the same or corresponding reference numerals, unless explicitly excluded. The disclosures contained in the entire description are transferable analogously to identical parts with the same reference numerals or component designations. Furthermore, the positional designations chosen in the description, such as top, bottom, side, etc., refer to the directly described and illustrated figure and must be applied analogously to any new position.Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

[0046] Fig. Figure 1 shows a hydraulically damped bearing 10 in longitudinal section. In the axial direction, the bearing 10 is intersected by a central longitudinal axis Z. The radial direction R and the circumferential direction U extend with respect to the central longitudinal axis Z. The bearing 10 includes a cage 20, which is shown in detail in Fig. Figure 2 shows the cage 20 having two axially spaced rings 20a, 20b, which are connected to each other via two webs 20c, 20d. Shell-shaped ring support elements 14 are placed on both sides between the rings 20a, 20b; these may also contain a section of a channel. The bearing 10 also includes an outer sleeve 30, which is shown in detail in Figure 2. Fig.Figure 3 shows that the outer sleeve 30 surrounds the cage 20 circumferentially. The bearing 10 further comprises an axial locking element 40, which acts between the cage 20 and the outer sleeve 30. The bearing 10 also includes an elastomer body 50, which delimits fluid-filled or fluid-fillable chambers 12. The cage 20 is embedded in the elastomer body 50. Two sealing elements 52, here in the form of sealing rings formed by the elastomer body 50, are arranged between the cage 20 and the outer sleeve 30. Furthermore, the elastomer body 50 forms axial stops 54 at one end face of the cage 20, which are interrupted in the circumferential direction U. Additionally, the elastomer body 50 forms an axial stop 56 at the other end face of the cage 20, which is continuous in the circumferential direction U.

[0047] In the embodiment shown, the axial locking element 40 comprises outer circumferential ribs 21 on the cage side, which are formed on the ring 20a at axial and radial intervals. The outer circumferential ribs 21 are provided on the outer circumference of the cage 20, project radially in the direction R, and extend with a zero slope in the circumferential direction U. A valley 21a is formed between axially adjacent outer circumferential ribs 21, which follows the outer circumferential ribs 21 in the circumferential direction U.

[0048] Furthermore, the axial locking element 40 includes cage-side areas in which these outer circumferential ribs 21 are interrupted in the circumferential direction U – so-called outer rib interruption areas 22, which extend parallel to the central longitudinal axis Z. This results in axially extending feed zones. The outer rib interruption areas 22 are free of outer circumferential ribs 21 and are formed by the cylindrical outer circumferential surface of the ring 20a. In addition, the outer rib interruption areas 22 are bounded in the circumferential direction U by the ends of the outer circumferential ribs 21. The valleys 21a are open towards the corresponding outer rib interruption area 22. The axially adjacent outer circumferential ribs 21 and those arranged in the circumferential direction U between two adjacent outer rib interruption areas 22 each define a rib block 21b, 21c.Each rib block 21b, 21c extends circumferentially U over a maximum of 1 / 4 of the circumference of the bearing 10 and has a developed length of at most 50 mm. Each rib block 21b, 21c is aligned axially, i.e., along the central longitudinal axis Z, with an axial stop 54 that is interrupted circumferentially U.

[0049] The axial locking element 40 comprises inner circumferential ribs 31 on the outer sleeve side, which are formed axially and radially spaced apart from one another on the outer sleeve 30. The inner circumferential ribs 31 are provided on the inner circumference of the outer sleeve 30, project in the radial direction R, and extend with a zero slope in the circumferential direction U. A valley 31a is formed between axially adjacent inner circumferential ribs 31, which follows the inner circumferential ribs 31 in the circumferential direction U.

[0050] Furthermore, the axial locking element 40 comprises areas on the outer sleeve side in which these inner circumferential ribs 31 are interrupted in the circumferential direction U – so-called inner rib interruption areas 32, which extend parallel to the central longitudinal axis Z. This results in axially extending feed zones. The inner rib interruption areas 32 are free of inner circumferential ribs 31 and are formed by the cylindrical inner circumferential surface of the outer sleeve 30. In addition, the inner rib interruption areas 32 are bounded in the circumferential direction U by the ends of the inner circumferential ribs 31. The valleys 31a are open towards the corresponding inner rib interruption area 32. The axially adjacent inner circumferential ribs 31 and those arranged in the circumferential direction U between two adjacent inner rib interruption areas 32 each define a rib block 31b, 31c.Each rib block 31b, 31c extends in circumferential direction U over a maximum of 1 / 4 of the circumference of the bearing 10 and has a developed length of a maximum of 50 mm.

[0051] In the illustrated embodiment, four interruption areas 22, 32, and thus four rib blocks 21b, 21c, 31b, 31c with ribs 21, 31, are provided. The outer rib interruption areas 22 can be arranged equidistant from each other, and the same can apply analogously to the inner rib interruption areas 32. The outer rib interruption areas 22 and the inner rib interruption areas 32 can be milled areas or produced directly during casting, for example by injection molding.

[0052] Between adjacent interruption areas 22, 32, three inner circumferential ribs 21 or outer circumferential ribs 31 are arranged in the respective rib block 21b, 21c, 31b, 31c.

[0053] One of the outer circumferential ribs 21 is designed as a poka-yoke outer rib 25. It projects beyond the axially adjacent outer circumferential rib 21 in the circumferential direction U. One of the inner circumferential ribs 31 is designed as a poka-yoke inner rib 35, being set back in the circumferential direction U relative to the axially adjacent inner circumferential rib 31. The two poka-yoke ribs 25, 35 correspond to each other and form an axial feature to prevent incorrect assembly.

[0054] It is evident that the circumferential length of all outer circumferential ribs 21 and inner circumferential ribs 31 within the respective rib block 21b, 21c, 31b, 31c, with the exception of the poka-yoke outer rib 25 and poka-yoke inner rib 35, is identical. It is also evident that all outer circumferential ribs 21 and inner circumferential ribs 31 within the respective rib block 21b, 21c, 31b, 31c, with the exception of the poka-yoke outer rib 25 and poka-yoke inner rib 35, are aligned with each other in the axial direction.

[0055] The cage 20 forms an axial rib 23 on its outer circumferential side. The axial rib 23 projects radially in the direction R and extends axially. At one end, the axial rib 23 can transition into the outer poka-yoke rib 25. The axial rib 23 forms an over-rotation prevention feature 24 on one circumferential side and a poka-yoke rotation direction stop 26 on its opposite circumferential side.

[0056] The over-rotation prevention device 24 is shown as a ramp structure extending in the radial direction R. An inner circumferential rib 31 can abut or run against the over-rotation prevention device 24 – thus preventing over-rotation of the cage 20 and outer sleeve 30 in the circumferential direction U. The poka-yoke rotation direction stop 26 is shown as a wall. An inner circumferential rib 31 can abut the poka-yoke rotation direction stop 26 – thus preventing rotation in the wrong circumferential direction U of the cage 20 and outer sleeve 30.

[0057] The cage 20 has several locking projections 27 on its outer circumferential surface, with each of the rib blocks 21b, 21c corresponding to a locking projection 27. The outer sleeve has several locking recesses 37 on its inner circumferential surface, corresponding to the locking projections 27, on the inner circumferential rib flanks of inner circumferential ribs 31, with each of the rib blocks 31b, 31c corresponding to a locking recess 37. Each locking projection 27 can engage in a locking recess 37.

[0058] The outer circumferential ribs 21 each have a leading-edge chamfer 28 at one end and a rib stop 29 at the opposite end. The inner circumferential ribs 31 also each have a leading-edge chamfer 38 at one corresponding end and a rib stop 39 at the opposite end. The leading-edge chamfers 28, 38 guide the respective rib 21, 31 from the interruption area 22, 32 into the corresponding valley 21a, 31a. The leading-edge chamfers 28, 38 are therefore positioned such that the leading-edge chamfers 28 of the outer circumferential ribs 21 can slide along the leading-edge chamfers 38 of the inner circumferential ribs 31.

[0059] The outer circumferential ribs 21 and inner circumferential ribs 31 are designed such that, when positioned in the corresponding interruption area 22, 32 of the other part of cage 20 and outer sleeve 30, they form a radial clearance of at least 1 mm.

[0060] Pre-assembly will be described below, whereby pre-assembly is understood to be a process by which the bearing as such is completely manufactured. After pre-assembly, the bearing as such should be complete. Assembly is understood to be a process by which the bearing is installed at or in its intended operational location.

[0061] The cage 20 and the outer sleeve 30 are positioned relative to each other and then moved axially towards each other, such that the outer circumferential ribs 21 of the cage 20 are axially advanced through the inner rib interruption areas 32 of the outer sleeve 30, and the inner circumferential ribs 31 of the outer sleeve 30 are axially advanced through the outer rib interruption areas 22 of the cage 20. The cage 20 and outer sleeve 30 are then rotated relative to each other in the circumferential direction U, whereby the leading edges 28, 38 slide onto each other and insert the respective rib 21, 31 into the respective valley 21a, 31a. The rib blocks 21b, 21c of the cage 20 then engage with the rib blocks 31b, 31c of the outer sleeve 30. The Poka-Yoke direction stop 26 prevents twisting in the wrong direction. The over-twisting device 24 prevents over-twisting in the correct direction.By pre-assembling or assembling the cage 20 and outer sleeve 30, the sealant 52 is pre-tensioned so that it can fulfill its sealing function.

[0062] The invention is not limited to one of the embodiments described above, but can be modified in a variety of ways. All features and advantages arising from the claims, the description, and the drawings, including design details, spatial arrangements, and process steps, can be essential to the invention both individually and in various combinations.

[0063] The invention encompasses all combinations of at least two of the features disclosed in the description, the claims and / or the figures.

[0064] To avoid repetition, features disclosed by the device itself shall also be deemed disclosed by the process and be claimable. Likewise, features disclosed by the process shall be deemed disclosed by the device itself and be claimable. Reference symbol list 10 warehouses 12th Chamber 14 Ring support element 20 cage 20a Ring 20b Ring 20c Bridge 20d Bridge 21 Outer circumferential rib 21a Valley 21b Rib block 21c Rib block 22 Outer rib interruption area 23 Axial web 24 Overspeed prevention devices 25 Poka-Yoke outer rib 26 Poka-Yoke rotation direction stop 27 locking projection 28 Inlet slope 29 Rib stop 30 Outer sleeve 31 Inner circumferential rib 31a Valley 31b Rib block 31c Rib block 32 Inner rib interruption area 35 Poka-Yoke inner rib 37 Snap-in recess 38 Inlet slope 39 Rib stop 40 axial locking devices 50 elastomer bodies 52 Sealants 54 Axial stop 56 Axial stop R Radial direction U circumferential direction Z Central longitudinal axis

Claims

Hydraulically damping bearing (10) which is penetrated by a central longitudinal axis (Z), comprising a cage (20), an outer sleeve (30) and an axial locking means (40) for axially securing the outer sleeve (30) to the cage (20), characterized in that the axial locking means (40) comprises outer circumferential ribs (21) on the cage (20) and inner circumferential ribs (31) on the outer sleeve (30), which each extend in the circumferential direction (U) and can interlock, wherein the cage (20) forms at least two outer rib interruption areas (22) on its outer circumferential side and the outer sleeve (30) forms at least two inner rib interruption areas (32), such that during axial relative movement along the central longitudinal axis (Z) between the cage (20) and the outer sleeve (30), the outer circumferential ribs (21) are interrupted by the inner rib interruption areas (32) and the The inner circumferential ribs (31) are adjustable through the outer rib interruption areas (22). Hydraulically damping bearing (10) according to claim 1, characterized in that the outer rib interruption areas (22) and inner rib interruption areas (32) are each limited in circumferential direction (U) by the respective ribs (21, 32) and / or each extend parallel to the central longitudinal axis (Z). Hydraulically damping bearing (10) according to one of the preceding claims, characterized in that the cage (20) forms two, three or four outer rib interruption areas (22) and the outer sleeve (30) forms correspondingly two, three or four inner rib interruption areas (32). Hydraulically damping bearing (10) according to one of the preceding claims, characterized in that at least two, preferably three, more preferably four, outer circumferential ribs (21) are arranged between adjacent outer rib interruption areas (22) and / or at least two, preferably three, more preferably four, inner circumferential ribs (31) are arranged between adjacent inner rib interruption areas (32). Hydraulically damping bearing (10) according to one of the preceding claims, characterized in that the outer circumferential ribs (21) and inner circumferential ribs (31) each extend in the circumferential direction (U) with a zero pitch or each form a thread. Hydraulically damping bearing (10) according to one of the preceding claims, characterized in that at least one of the outer circumferential ribs (21) is designed as a Poka-Yoke outer rib (25) which extends beyond the axially adjacent outer circumferential rib (21) in the circumferential direction (U), and at least one of the inner circumferential ribs (31) is designed as a Poka-Yoke inner rib (35) which is recessed in the circumferential direction (U) with respect to the axially adjacent inner circumferential rib (31). Hydraulically damping bearing (10) according to one of the preceding claims, characterized in that the cage (20) or the outer sleeve (30) has a Poka-Yoke rotation direction stop (26) against which a rib (21, 31) of the other of cage (20) and outer sleeve (30) can abut in circumferential direction (U). Hydraulically damping bearing (10) according to one of the preceding claims, characterized in that one of cage (20) and outer sleeve (30) has at least one locking recess (37) and the other of cage (20) and outer sleeve (30) has at least one corresponding locking projection (27). Hydraulically damping bearing (10) according to one of the preceding claims, characterized in that the outer circumferential ribs (21) and / or the inner circumferential ribs (31) each form a leading-in chamfer (28, 38) at one end, preferably at both ends. Hydraulically damping bearing (10) according to one of the preceding claims, characterized in that the length of the outer rib interruption areas (22) in the circumferential direction (U) is at least 1 mm, preferably at least 2 mm, longer than the length of the inner circumferential ribs (31) between adjacent inner rib interruption areas (32) in the circumferential direction (U) and that the length of the inner rib interruption areas (32) in the circumferential direction (U) is at least 1 mm, preferably at least 2 mm, longer than the length of the outer circumferential ribs (21) in the circumferential direction (U).

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