Hydraulic bearing, motor vehicle with such a hydraulic bearing, and method for manufacturing an integral unit for such a hydraulic bearing

Abstract

Hydraulic bearings (2) with - an elastic support spring (4), - a working chamber (6) partially enclosed by the support spring (4) and filled with hydraulic fluid, - an elastic, elastomeric rolling membrane (8), - a compensation chamber (10) partially enclosed by the rolling membrane (8), - a separating unit (12) separating the working chamber (6) from the compensation chamber (10), which is arranged between the support spring (4) and the rolling diaphragm (8), - a throttle channel (11) extending between the working chamber (6) and the compensation chamber (10) for the exchange of hydraulic fluid, and - a fastening ring (14) which is arranged radially outside to the support spring (4), the separating unit (12) and the rolling diaphragm (8), - wherein the support spring (4) and the rolling diaphragm (8) are each connected circumferentially to the retaining ring (14) in a sealing manner, characterized in that - an elastomeric clamping ring (16) presses a radially outer sealing section (18) of the rolling diaphragm (8) against the retaining ring (14), and - the clamping ring (16) and the rolling diaphragm (8) form an integral unit (20).

Description

[0001] The invention relates to a hydraulic bearing with an elastic support spring, a working chamber partially enclosed by the support spring and filled with hydraulic fluid, an elastic, elastomeric rolling diaphragm, a compensation chamber partially enclosed by the rolling diaphragm, a separating unit separating the working chamber from the compensation chamber and arranged between the support spring and the rolling diaphragm, a throttle channel extending between the working chamber and the compensation chamber for exchanging hydraulic fluid, and a retaining ring arranged radially outside to the support spring, the separating unit and the rolling diaphragm, wherein the support spring and the rolling diaphragm are each circumferentially sealed to the retaining ring.

[0002] Furthermore, the invention relates to a motor vehicle comprising a vehicle body, an engine drive and an engine mount designed as a hydraulic mount, which establishes a bearing connection between the engine drive and the vehicle body.

[0003] The invention further relates to a method for manufacturing a unit consisting of a clamping ring and a rolling diaphragm for a hydraulic bearing.

[0004] Hydraulic mounts, also known as hydro-mounts, are known from the prior art. They serve to provide elastic support for assemblies, particularly motor vehicle engines. Such hydraulic mounts, located, for example, between an engine and a vehicle body, especially the chassis, are intended to prevent engine vibrations from being transmitted to the chassis, as these vibrations are often perceived by vehicle passengers as unpleasant noises.

[0005] In its basic form, such a hydraulic mount typically features an elastomeric support spring, in particular a corresponding rubber element, which is also referred to as the support body. The support spring serves to absorb external forces. Furthermore, the support spring partially encloses a working chamber, which preferably forms part of a hydraulic damper of the hydraulic mount. To be able to enclose the working chamber, the support spring can, for example, be designed in the form of a hollow cone. The support spring can thus form a cavity open at one end. In this case, the wall of the working chamber can be at least partially formed by the support spring. Alternatively, the support spring can be designed in such a way that it forms a shell wall of the working chamber. In this case as well, the support spring at least partially encloses the working chamber.Therefore, "enclosing" means at least partial enclosure.

[0006] A top cover can be provided on the upper, pointed end face of the support spring, to which a connecting element for attaching the motor is attached. This connecting element is, for example, a threaded bolt that can be screwed to the motor.

[0007] The hydraulic damper of a hydraulic mount preferably comprises at least two chambers, namely the working chamber and the compensation chamber. In the longitudinal direction of the hydraulic mount, the compensation chamber is usually arranged below the working chamber. To spatially separate the working chamber and the compensation chamber, a separating unit, in particular designed as a partition, is arranged between them. Furthermore, a throttle channel extending between the working chamber and the compensation chamber is provided for the exchange of hydraulic fluid. The throttle channel thus creates a hydraulic coupling between the working chamber and the compensation chamber. Preferably, the throttle channel is formed at least partially by the separating unit. Alternatively, the throttle channel can also be formed separately from the separating unit.Preferably, the compensation chamber and / or the throttle channel are also at least partially filled with hydraulic fluid. A mixture of glycol and water is preferably used as the hydraulic fluid.

[0008] The compensation chamber serves to receive hydraulic fluid from the working chamber when the pressure in the working chamber rises and hydraulic fluid flows through the throttle channel towards the compensation chamber. The compensation chamber is partially enclosed by an elastic rolling diaphragm of the hydraulic bearing. The rolling diaphragm is designed as an elastomer rolling diaphragm, allowing the volume of the compensation chamber to change. Regarding the enclosure, reference is preferably made to the previous explanations concerning the support spring, which are analogous. Enclosure therefore refers to at least partial enclosure. Furthermore, the rolling diaphragm preferably forms a cavity open at one end. The wall of the compensation chamber can be at least partially formed by the rolling diaphragm. In this case, the cavity of the rolling diaphragm forms at least part of the compensation chamber.

[0009] When the hydraulic mount is loaded, a force acts longitudinally on the spring, causing it to deform elastically. This deformation is also known as spring compression. The working chamber is at least partially enclosed by the spring, so the spring's compression reduces the chamber's size. This increases the pressure in the working chamber, causing some of the hydraulic fluid to flow from the working chamber through the throttle channel into the compensation chamber. The throttle channel presents a flow resistance to the hydraulic fluid. Therefore, the flow of hydraulic fluid through the throttle channel dampens the spring compression.

[0010] Such a hydraulic bearing is known, for example, from document DE 693 00 371 T2.

[0011] To effectively prevent fluid leakage from the hydraulic mount, a retaining ring is provided. The retaining ring can be designed like a pipe section. It extends from the support spring to the rolling diaphragm. Alternatively or additionally, the retaining section can serve as a fastening element between the support spring and the rolling diaphragm. The retaining ring is positioned radially outside the support spring, the separating unit, and the rolling diaphragm, and the support spring and rolling diaphragm are each sealed to the retaining ring around their entire circumference. Thus, the support spring, the retaining ring, and the rolling diaphragm define the interior space of the hydraulic mount. The connections to the retaining ring can be axially offset from one another. The resulting space between the support spring and the rolling diaphragm accommodates the separating unit.The separating unit, in particular the partition, can therefore be arranged between the working chamber and the compensation chamber. The separating unit can at least substantially close the opening of the cavity of the support spring and / or the opening of the cavity of the rolling diaphragm, so that the working chamber or the compensation chamber can form.

[0012] Several steps are necessary to manufacture a component consisting of a support spring, retaining ring, separating unit, and rolling diaphragm. For example, the connection between the support spring and the retaining ring must be established. The retaining ring is preferably made of a plastic, particularly an elastomer. Alternatively or additionally, the retaining ring can be metallic. It is conceivable, for instance, that the retaining ring is made of a composite material containing, for example, metallic and elastomeric components. The connection between the support spring and the retaining ring is preferably a material-bonded connection. Alternatively or additionally, a force-fit and / or a form-fit connection can also be provided.Preferably, the retaining ring with an end-face opening overlaps the support spring, forming a connection between a radially inner surface of the retaining ring and a radially outer surface of the support spring. The separating unit can be inserted into the tubular cavity of the retaining ring through the opposite end-face opening. The rolling diaphragm then follows. The rolling diaphragm can also be inserted into the tubular cavity of the retaining ring and / or at least be enclosed within it. Finally, a sealing connection must be established between the rolling diaphragm and the retaining ring. This connection also creates a seal between the rolling diaphragm and the retaining ring. This sealing connection prevents hydraulic fluid from unintentionally leaking from the hydraulic bearing at any point between the rolling diaphragm and the retaining ring.

[0013] In practice, it has been found that creating a sealing connection between the rolling diaphragm and the mounting ring is complex. For example, the rolling diaphragm can be glued to the inner surface of the mounting ring. However, such gluing requires drying times, resulting in a long manufacturing time. Alternatively, the rolling diaphragm can be secured to the mounting ring by a metallic clamping ring, particularly a type of expansion ring, which presses the rolling diaphragm circumferentially against the inner surface of the mounting ring. The metallic clamping ring exhibits higher radial stiffness, especially spring stiffness, than the rolling diaphragm. Therefore, the metallic clamping ring serves to create a force-fit, sealing connection between the rolling diaphragm and the mounting ring.In practice, however, creating the sealing connection between the rolling diaphragm and the retaining ring using the metallic clamping ring has proven to be time-consuming. This is because it requires first precisely positioning the rolling diaphragm relative to the retaining ring, then positioning the pre-tensioned metallic clamping ring relative to the rolling diaphragm, and finally releasing the metallic clamping ring to move into its corresponding clamping position. Therefore, creating the sealing connection between the rolling diaphragm and the retaining ring is a multi-step process.

[0014] The invention is therefore based on the objective of providing a hydraulic bearing in which the aforementioned disadvantages are prevented or reduced. Preferably, the sealing connection between the rolling diaphragm and the retaining ring should be as simple and quick to establish as possible.

[0015] According to a first aspect, the problem is solved by the hydraulic bearing according to the invention, comprising an elastic support spring, a working chamber partially enclosed by the support spring and filled with hydraulic fluid, an elastic, elastomeric rolling diaphragm, a compensation chamber partially enclosed by the rolling diaphragm, a separating unit separating the working chamber from the compensation chamber and arranged between the support spring and the rolling diaphragm, a throttle channel extending between the working chamber and the compensation chamber for the exchange of hydraulic fluid, and a retaining ring arranged radially outside the support spring, the separating unit, and the rolling diaphragm, wherein the support spring and the rolling diaphragm are each circumferentially sealed to the retaining ring, and an elastomeric clamping ring presses a radially outside sealing section of the rolling diaphragm against the retaining ring.and the clamping ring and the rolling diaphragm form an integral unit.

[0016] The invention is based on the idea of ​​reducing the production of the sealing connection between the rolling diaphragm and the retaining ring to a single process step. For this purpose, the clamping ring and the rolling diaphragm form an integral unit. They are therefore already connected to each other before the rolling diaphragm is attached to the retaining ring. The clamping ring and the rolling diaphragm can have a material-bonded connection and / or another suitable connection to each other. The rolling diaphragm is an elastically deformable body. Therefore, the rolling diaphragm is designed as an elastomer rolling diaphragm. To make the desired integral connection between the clamping ring and the rolling diaphragm as simple as possible, the clamping ring is also designed as an elastomer clamping ring.If the rolling diaphragm engages with an end-face opening in the retaining ring, this also applies to the retaining ring due to the integral connection between the clamping ring and the rolling diaphragm. The clamping ring can be positioned radially inside a radially outside sealing section of the rolling diaphragm to press this sealing section against any movement of the retaining ring. This can occur simultaneously with the insertion of the rolling diaphragm into the retaining ring. Since the clamping ring is automatically correctly positioned by the aforementioned connection to the rolling diaphragm, the sealing connection between the rolling diaphragm and the retaining ring can be achieved in a single step: inserting the integral unit consisting of the clamping ring and the rolling diaphragm into the retaining ring. This simplifies and speeds up the assembly of the hydraulic mount.At the same time, the quality of the hydraulic bearing is improved, as the clamping ring is always correctly positioned relative to the rolling diaphragm. This also ensures a particularly high quality of the sealing connection between the rolling diaphragm and the retaining ring.

[0017] A preferred embodiment of the hydraulic bearing is characterized by a clamping ring with a higher stiffness than the rolling diaphragm. Because the clamping ring's stiffness, particularly in its radial direction, is greater than that of the rolling diaphragm, it can press the radially outer sealing section of the rolling diaphragm against the retaining ring. This is because, when the integral unit consisting of the clamping ring and the rolling diaphragm deforms, the clamping ring, due to its higher stiffness, also generates higher reaction forces. The clamping ring therefore dominates the shape of the rolling diaphragm's sealing section. This ensures a seal between the radially outer sealing section of the rolling diaphragm and the retaining ring.If a seal is to be formed on a radially inner surface of the retaining ring, the clamping ring presses the sealing section of the rolling diaphragm against a radially inner surface of the retaining ring. Conversely, if the seal is to be formed radially on the outer surface of the retaining ring, the clamping ring presses the sealing section of the rolling diaphragm against a radially outer surface of the retaining ring. Corresponding to these two seal configurations, the diameter and / or stiffness of the clamping ring can be adjusted to achieve the desired radial reaction force, ensuring a seal between the sealing section of the rolling diaphragm and the retaining ring.

[0018] Another preferred embodiment of the hydraulic bearing is characterized by the fact that the rolling diaphragm and / or the clamping ring are made of or with a thermoplastic elastomer. Thermoplastic elastomers have proven advantageous for the rolling diaphragm and / or the clamping ring because they are particularly easy and precise to process. Furthermore, a particularly robust connection between the rolling diaphragm and the clamping ring can be achieved if both are made of or with a thermoplastic elastomer, thus creating the desired integral unit of the clamping ring and the rolling diaphragm.

[0019] Another preferred embodiment of the hydraulic bearing is characterized by the fact that the clamping ring is designed as a polypropylene clamping ring and / or the rolling diaphragm is designed as a styrene block copolymer rolling diaphragm. A rolling diaphragm made of or containing a styrene block copolymer is particularly elastically deformable, so that the compensation chamber, which is at least partially enclosed by the rolling diaphragm, can be inflated as needed. This occurs when hydraulic fluid flows from the working chamber through the throttle channel into the compensation chamber. However, when the support spring rebounds, the absorbed hydraulic fluid should flow again in the opposite direction through the throttle channel, so that a loss of hydraulic fluid from the compensation chamber must be prevented. This requires a particularly effective seal between the sealing section of the rolling diaphragm and the retaining ring.Using a clamping ring made of polypropylene has proven advantageous for this purpose. Such a clamping ring can form the desired, preferably material-bonded, connection to the rolling diaphragm to ensure the permanently precise relative positioning of the clamping ring to the sealing section, and also generate the necessary reaction force in the radial direction to create the sealing, force-fit connection between the sealing section of the rolling diaphragm and the retaining ring.

[0020] Another preferred embodiment of the hydraulic bearing is characterized by the fact that the clamping ring and the rolling diaphragm are bonded together by a material bond. Essentially, the integral unit between the clamping ring and the rolling diaphragm is ensured by this bonded connection. In practice, a material bond between the clamping ring and the rolling diaphragm has proven advantageous for forming this integral unit. Such a connection effectively prevents accidental shifting and / or displacement of the clamping ring on the rolling diaphragm, or vice versa. In other words, a permanent, precise positioning of the clamping ring on the rolling diaphragm can be guaranteed after the integral unit has been manufactured, throughout the entire subsequent production of the hydraulic bearing, resulting in a hydraulic bearing of exceptionally high quality.

[0021] Another preferred embodiment of the hydraulic bearing is characterized by the fact that the clamping ring and the rolling diaphragm are designed as a two-component injection-molded unit. Thermoplastic elastomers have proven advantageous for the production of the rolling diaphragm and the clamping ring, as they can be manufactured using a multi-component injection molding process. In this process, the rolling diaphragm can first be produced using injection molding technology, and the clamping ring can then be injection-molded onto the rolling diaphragm or the associated sealing section, or vice versa. Preferably, different thermoplastic elastomers are used for the rolling diaphragm and the clamping ring.However, the two-component injection molding process results in a strong adhesive effect between the rolling membrane and the clamping ring, even with different thermoplastic elastomers, so that the integral unit of the rolling membrane and the clamping ring is retained even during further assembly.

[0022] Another preferred embodiment of the hydraulic bearing is characterized by the integral unit being inserted onto or into the retaining ring. The integral unit can therefore be produced separately before insertion. This simplifies manufacturing, leading to a reduction in production costs. Insertion creates a type of press fit between the integral unit, which is preferably cylindrical, and the retaining ring, thus forming the desired seal between the sealing section of the rolling diaphragm and the retaining ring.

[0023] Another preferred embodiment of the hydraulic mount is characterized by the fact that the integral unit and the mounting ring are connected to each other by a snap-fit ​​connection. The snap-fit ​​connection is therefore preferably an additional connection. To make it as easy as possible to insert the integral unit onto or into the mounting ring, the corresponding end face of the mounting ring can be chamfered or angled relative to the axial direction of the mounting ring. To ensure that the integral unit does not unintentionally slip off the mounting ring, especially under high loads on the hydraulic mount, the integral unit can be connected to the mounting ring by a positive-locking connection, preferably the aforementioned snap-fit ​​connection, which is particularly releasable. The aforementioned connection between the integral unit and the mounting ring is formed when the integral unit is inserted or inserted.This makes the corresponding assembly step particularly easy to perform. The complexity of manufacturing the hydraulic bearing is thus reduced, which in turn lowers production costs.

[0024] According to a further aspect, the aforementioned problem is also solved by a motor vehicle comprising a vehicle body, an engine, and an engine mount that establishes a bearing connection between the engine and the vehicle body, wherein the engine mount is designed by a hydraulic mount according to the invention. Features, details, and advantages described in connection with the hydraulic mount according to the invention naturally also apply in connection with the motor vehicle according to the invention, and vice versa, so that the disclosure regarding the individual aspects of the invention always makes, or can make, reciprocal references.

[0025] According to a further aspect, the aforementioned problem is also solved by a method for manufacturing a unit consisting of a clamping ring and a rolling diaphragm for a hydraulic mount according to one of the preceding aspects or associated advantageous embodiments, wherein the integral unit consisting of the clamping ring and the rolling diaphragm is manufactured by an injection molding process. Features, details, and advantages described in connection with the hydraulic mount according to the invention and / or the motor vehicle naturally also apply in connection with the method according to the invention, and vice versa, so that the disclosure relating to the individual aspects of the invention is always, or can always be, mutually referenced.

[0026] An advantageous embodiment of the process is characterized by the fact that the integral unit is manufactured by a multi-component injection molding process, in particular a two-component injection molding process. First, the rolling diaphragm can be manufactured by injection molding. Then, in this case, the clamping ring is injection molded onto the rolling diaphragm, in particular onto the radially outer sealing section of the rolling diaphragm. Alternatively, the clamping ring can first be manufactured by injection molding, and then the rolling diaphragm can be injection molded onto the clamping ring. Preferably, different thermoplastic elastomers are used for the rolling diaphragm and the clamping ring. The thermoplastic elastomer for the clamping ring exhibits a higher stiffness in the solidified state than the thermoplastic elastomer for the rolling diaphragm in the solidified state.

[0027] A further advantageous embodiment of the method is characterized in that the hydraulic bearing is manufactured using the integral unit consisting of the clamping ring and the rolling diaphragm. The following steps can be considered for this purpose: manufacturing the elastic support spring, in particular by means of an injection molding process; manufacturing the retaining ring, in particular by means of an injection molding process, most preferably by injection molding the retaining ring onto the support spring; manufacturing the separating unit; inserting the separating unit into the retaining ring, preferably through an opening in the retaining ring facing away from the support spring; and inserting or fitting the integral unit consisting of the clamping ring and the rolling diaphragm into or onto an end of the retaining ring facing away from the support spring.

[0028] The invention is described below, without limiting the general concept of the invention, with reference to an exemplary embodiment and the drawing. The drawing shows: Fig. 1 A schematic cross-sectional view of a first embodiment of the hydraulic bearing.

[0029] From the Fig. Figure 1 shows a hydraulic mount 2 according to the invention. The hydraulic mount 2 comprises a support spring 4 designed as a rubber element. This support spring 4 is usually designed as a hollow body, with the upper side of the support spring 36 having a cover. A connecting element (not shown) for attaching a motor is usually attached to the cover. In a simple embodiment, the connecting element is a threaded bolt that can be screwed to the motor. At the underside of the support spring 4, the cavity of the support spring 4 is not completely closed by the support spring 4 itself. Therefore, the separating unit 12, designed as a partition, connects here. The working chamber 6 is formed between the support spring 4 and the partition 12. The working chamber 6 is filled with a hydraulic fluid. This is preferably a mixture of glycol and water.

[0030] Furthermore, a retaining ring 14 is provided. The retaining ring 14 is arranged on the outside of the support spring 4. The retaining ring 14 and the support spring 4 are also sealed together. The retaining ring 14 projects beyond the support spring 4 in a longitudinal direction L of the hydraulic bearing 2, away from the working chamber 6. Thus, the retaining ring 14 extends beyond the support spring 4.

[0031] For the manufacture of the hydraulic bearing 2, it has proven advantageous to first produce the support spring 4 and the attached mounting ring 14. The partition 12 is then inserted into the mounting ring 14 through an opening in the mounting ring 14 facing away from the support spring 4. As soon as the partition 12 meets the support spring 4, it covers the opening of the cavity in the support spring 4, thus forming the working chamber 6.

[0032] Subsequently, an integral unit consisting of a rolling diaphragm 8 and an elastomeric clamping ring 16 is inserted or pushed into the mounting ring through the aforementioned opening on the end face. The elastomeric clamping ring 16 presses a radially outer sealing section 18 of the rolling diaphragm 8 against a radially inner surface of the mounting ring 14. A seal is therefore formed between the rolling diaphragm 8 and the mounting ring 14.

[0033] The space enclosed by the partition 12 and the rolling diaphragm 8 forms a compensation chamber 10 of the hydraulic mount 2. The compensation chamber 10 is filled with hydraulic fluid, which is preferably a mixture of glycol and water. From the Fig. It can therefore be seen from Figure 1 that the partition wall 12 is arranged between the working chamber 6 and the compensation chambers 10.

[0034] To dampen vibrations that act from a motor via the cover onto the support spring 4 and thus also onto a working chamber volume of the working chamber 6, a throttle channel 11 is provided between the working chamber 6 and the compensation chamber 10, which serves for the exchange of hydraulic fluid. As in Fig. As shown in Figure 1, the throttle channel 11 is at least partially formed by or enclosed in the partition 12. The throttle channel 11 is at least annular in shape, with one opening at one end of the ring opening to the working chamber 6 and another opening at the other end opening to the compensation chamber 10.

[0035] If the support spring 4 is compressed by vibrations, this usually leads to an increase in the pressure of the hydraulic fluid in the working chamber 6 and / or a reduction in the volume of the working chamber 6. In both cases, a volume flow of hydraulic fluid from the working chamber 6 occurs through the throttle channel 11 into the compensation chamber 10. The throttle channel 11 has such a small diameter that dissipation occurs and the vibrations acting on the support spring 4 are dampened.

[0036] To prevent hydraulic fluid from unintentionally leaking from the hydraulic mount 2, the interior of the hydraulic mount 2, which comes into contact with the hydraulic fluid, must be sealed. This is achieved, among other things, by the seal that forms between the sealing section 18 of the rolling diaphragm 8 and the retaining ring 14. The seal is created when the clamping ring 16 presses the sealing section 18 outwards with a reaction force acting in the radial direction R, thereby pressing the sealing section 18 against the inner surface of the retaining ring 14. The quality of the seal formed in this way depends, among other things, on the precise positioning of the clamping ring 16 and the adjacent sealing section 18 of the rolling diaphragm 8 within the retaining ring 14.If the clamping ring 16 and / or the sealing section 18 are, for example, misaligned or otherwise undesirably displaced within the mounting ring 14, the resulting seal will offer only reduced resistance to the escape of hydraulic fluid. To prevent this, the invention provides that the clamping ring 16 and the rolling diaphragm 8 form an integral unit. For this purpose, the clamping ring 16 and the rolling diaphragm 8 are manufactured using a two-component injection molding process before being inserted into the mounting ring 14. The integral unit consisting of the clamping ring 16 and the rolling diaphragm 8 thus forms a two-component injection-molded unit.This ensures that the clamping ring 16 is positioned exactly on and / or in the sealing section 18 of the rolling diaphragm 8 in order to press the sealing section 18 firmly against the retaining ring 14 when the rolling diaphragm 8 is inserted into the retaining ring 14, in order to produce a particularly good seal.

[0037] To facilitate the insertion of the integral unit consisting of the clamping ring 16 and the rolling diaphragm 8 into the retaining ring 14, an end of the retaining ring 14 facing away from the working chamber 6 can be chamfered or beveled. Alternatively or additionally, an end section of the retaining ring 14 facing away from the working chamber 6 can be tapered. The force acting in the radial direction R between the sealing section 18 and the inside of the end section of the retaining ring 14 thus increases continuously when the integral unit is inserted, because the clamping ring 16 is compressed more strongly due to the tapering diameter. To prevent the integral unit consisting of the clamping ring 16 and the rolling diaphragm 8 from unintentionally slipping out of the retaining ring 14, the integral unit and the retaining ring 14 can be connected to each other by an additional snap connection 22.For this purpose, the fastening ring 14 can have a groove 24 into which a fastening lug 26 of the integral unit, in particular of the clamping ring 16, engages in such a way that the integral unit is prevented from slipping out of the fastening ring 14. Reference symbol list L Longitudinal direction R Radial direction 2 hydraulic bearings 4 Support spring 6 Chamber of Labour 8 Rolling membrane 10 Compensation Chamber 11 Throttle channel 12 Partition unit or partition wall 14 Mounting ring 16 clamping ring 18 Sealing section 20 integral unit 22 Snap connection 24 Nut 26 Mounting nose

Claims

[1] Hydraulic bearing (2) with - an elastic support spring (4), - a working chamber (6) partially enclosed by the support spring (4) and filled with hydraulic fluid, - an elastic, elastomeric rolling membrane (8), - a compensation chamber (10) partially enclosed by the rolling membrane (8), - a separating unit (12) separating the working chamber (6) from the compensation chamber (10), which is arranged between the support spring (4) and the rolling diaphragm (8), - a throttle channel (11) extending between the working chamber (6) and the compensation chamber (10) for the exchange of hydraulic fluid, and - a fastening ring (14) which is arranged radially outside to the support spring (4), the separating unit (12) and the rolling diaphragm (8), - wherein the support spring (4) and the rolling diaphragm (8) are each connected to the retaining ring (14) in a circumferentially sealing manner, characterized by , that - an elastomeric clamping ring (16) presses a radially outer sealing section (18) of the rolling diaphragm (8) against the retaining ring (14), and - the clamping ring (16) and the rolling diaphragm (8) form an integral unit (20). [2] Hydraulic bearing (2) according to the preceding claim, characterized by , that the clamping ring (16) has a higher stiffness than the rolling diaphragm (8). [3] Hydraulic bearing (2) according to one of the preceding claims, characterized by that the rolling membrane (8) is made with or from a thermoplastic elastomer and / or the clamping ring (16) is made with or from a thermoplastic elastomer. [4] Hydraulic bearing (2) according to any one of the preceding claims, characterized by , that the clamping ring (16) is designed as a polypropylene clamping ring and / or the rolling diaphragm (8) is designed as a styrene block copolymer rolling diaphragm. [5] Hydraulic bearing (2) according to any one of the preceding claims, characterized by, that the clamping ring (16) and the rolling diaphragm (8) are materially bonded. [6] Hydraulic bearing (2) according to any one of the preceding claims, characterized by , that the clamping ring (16) and the rolling diaphragm (8) are designed as a two-component injection molding unit. [7] Hydraulic bearing (2) according to any one of the preceding claims, characterized by , that the integral unit (20) is placed on or in the mounting ring (14). [8] Hydraulic bearing (2) according to any one of the preceding claims, characterized by , that the integral unit (20) and the fastening ring (14) are connected to each other by a snap connection (22). [9] motor vehicle with - a vehicle body, - a motor drive and - an engine mount that provides a bearing connection between the engine drive and the vehicle body, characterized by , that - the engine mount is formed by a hydraulic mount (2) according to one of the preceding claims 1 to 8. [10] Method for manufacturing an integral unit (20) from a clamping ring (16) and a rolling diaphragm (8) for a hydraulic bearing (2) according to any one of the preceding claims 1 to 8, characterized by , that the integral unit (20) consisting of the clamping ring (16) and the rolling diaphragm (8) is manufactured by an injection molding process.

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