Damping valve device for vibration damper of motor vehicle

Abstract

The invention relates to a shock absorber (10) for a motor vehicle, comprising an outer cylinder (12) and an inner cylinder (14) arranged coaxially therewith, and a working piston (18) arranged within the inner cylinder (14) so as to be axially movable, which working piston divides the interior of the inner cylinder (14) into a working chamber (22) on the piston rod side and a working chamber (24) remote from the piston rod. The shock absorber (10) has a first damping valve arrangement (54a) with a first inlet connector (52a) for the entry of hydraulic fluid into the first damping valve arrangement (54a) and a second damping valve arrangement (54b) with a second inlet connector (52b) for the entry of hydraulic fluid into the second damping valve arrangement (54b). A first inlet connector (52a) extends radially inward through a first intermediate barrel opening (56a) and an inner barrel opening (58) into a working chamber (24) away from the piston rod.

Description

Technical Field

[0001] The invention relates to a damping valve device for a shock absorber of a motor vehicle, wherein the damping valve device comprises a main valve and a pilot valve. Background Art

[0002] DE 10 20 21 20 24 18 A1 discloses a shock absorber with two external damping valves. Different requirements on the installation space of shock absorbers in vehicles require that the arrangement of the damping valves relative to one another is as flexible and compact as possible. Summary of the Invention

[0003] It is therefore an object of the present invention to provide a shock absorber having two external damping valves which have a high degree of freedom in their arrangement relative to one another.

[0004] According to the invention, this object is achieved by a damping valve device having the features of independent device claim 1. Advantageous further developments are revealed in the dependent claims.

[0005] According to a first aspect, a shock absorber for a motor vehicle includes an outer cylinder, an inner cylinder arranged coaxially with the outer cylinder, and a working piston arranged axially movable within the inner cylinder. The working piston divides the interior space of the inner cylinder into a working chamber on the piston rod side and a working chamber distal to the piston rod. The shock absorber includes a first damping valve assembly and a second damping valve assembly. The first damping valve assembly has a first inlet connector for supplying hydraulic fluid into the first damping valve assembly, and the second damping valve assembly has a second inlet connector for supplying hydraulic fluid into the second damping valve assembly. The first inlet connector extends radially inward through a first intermediate cylinder opening and an inner cylinder opening into the working chamber distal to the piston rod.

[0006] This arrangement provides a particularly space-saving valve installation, wherein the damping valve device can be oriented in different positions, in particular in different angular and axial positions.

[0007] The shock absorber is, for example, a single-tube shock absorber or a multi-tube shock absorber, such as a twin-tube shock absorber. The shock absorber comprises, for example, an outer tube, which forms the outer surface of the shock absorber, in particular the housing. An inner tube, also known as a damping tube, is coaxially arranged within the outer tube. A balancing chamber is formed between the outer and inner tubes and is preferably at least partially filled with a hydraulic fluid. For example, the balancing chamber is partially filled with gas.

[0008] Preferably, a working piston connected to the piston rod is arranged within the inner barrel so that it can move within the inner barrel, wherein the inner barrel preferably serves as a guide for the working piston. For example, a valve device is arranged on the working piston. The working piston divides the interior of the inner barrel into a first working chamber on the piston rod side and a second working chamber remote from the piston rod.

[0009] Each damping valve assembly is, for example, at least partially arranged outside the outer cylinder of the shock absorber. Within the balancing chamber, the intermediate cylinder is preferably arranged coaxially with the inner cylinder and the outer cylinder and between the inner cylinder and the outer cylinder. Each damping valve assembly is, for example, mounted on the intermediate cylinder. The intermediate cylinder is preferably mounted in a fluid-tight manner on the inner cylinder, wherein an annular chamber is formed between the intermediate cylinder and the inner cylinder. Each damping valve assembly is preferably constructed identically.

[0010] The intermediate tube is preferably secured to the inner tube via two intermediate tube mounting elements. The first intermediate tube mounting element is, for example, located at the end of the intermediate tube facing away from the piston rod, and the second intermediate tube mounting element is located at the piston rod-side end of the intermediate tube. Preferably, the intermediate tube mounting elements include two radially inwardly extending constrictions, wherein the diameter of the intermediate tube is reduced in the region of the constrictions, so that the intermediate tube preferably abuts the inner tube with a clearance fit. A widening, particularly an annular widening, of the intermediate tube connects to the constriction, wherein the diameter of the intermediate tube is widened to its previous diameter outside the constriction. For example, another narrowing connects axially outwardly to the widening, which further narrowing particularly forms the end of the intermediate tube. Preferably, the widening is configured such that it forms a closed annular chamber between the intermediate tube and the inner tube. A sealing element, particularly a sealing ring, is located within the annular chamber, for example, which abuts the inner tube and the intermediate tube and forms a fluid-tight seal between the two. The intermediate tube optionally extends the entire length of the inner tube. In particular, the intermediate barrel has a length which corresponds, for example, to 50% to 110%, in particular 90% to 100%, of the length of the inner barrel.

[0011] In particular, an annular chamber is formed between the intermediate cylinder and the inner cylinder. At least one through-opening is formed in the inner cylinder, which fluidically connects the first working chamber to the annular chamber. The through-opening preferably opens into the piston rod-side end of the annular chamber. The intermediate cylinder is made of metal, for example.

[0012] The shock absorber preferably includes at least two damping valve arrangements, which are arranged at least partially outside the outer cylinder. The first damping valve arrangement is preferably constructed and arranged such that hydraulic fluid flows through it during a compression phase when the working piston moves in a compression direction. The second damping valve arrangement is preferably constructed and arranged such that hydraulic fluid flows through it during an extension phase when the working piston moves in an extension direction.

[0013] The first damping valve device is preferably designated as a compression-phase valve and is, in particular, configured to dampen movement of the working piston in the compression direction. The second damping valve device is preferably designated as an extension-phase valve and, in particular, is configured to dampen movement of the working piston in the extension direction. The damping valve device is, for example, a solenoid-controlled valve, a pressure-limiting valve, or a multi-way valve, which preferably allows flow in only one direction.

[0014] The intermediate cylinder has, in particular, a first intermediate cylinder opening which is designed and arranged to receive the first damping valve arrangement. The intermediate cylinder opening has, in particular, a circular cross section.

[0015] The inner cylinder preferably has an inner cylinder opening that is designed and arranged to receive the first damping valve arrangement, in particular the compression stage valve. The inner cylinder opening is particularly circular and is preferably arranged coaxially with the first intermediate cylinder opening. The inner cylinder preferably has exactly one inner cylinder opening for receiving the damping valve arrangement.

[0016] The outer sleeve preferably has a first and a second outer sleeve opening, which are designed and arranged to receive the respective damping valve arrangement. The outer sleeve opening is particularly circular and preferably arranged coaxially with the respective central sleeve opening. The outer sleeve preferably has exactly two outer sleeve openings for receiving the respective damping valve arrangement.

[0017] The damping valve assembly preferably includes a valve housing that forms the outer surface of the damping valve assembly. The valve housing is at least partially arranged outside the outer sleeve and, in particular, is fixedly connected to the outer sleeve. The valve housing is preferably cylindrical in shape. Coaxially with the valve housing, the damping valve assembly includes an inlet connector, which is preferably cylindrical in shape and forms a fluid inlet for the respective damping valve assembly. The first inlet connector preferably forms the fluid inlet for the first damping valve assembly, while the second inlet connector preferably forms the fluid inlet for the second damping valve assembly. The first inlet connector of the first damping valve assembly preferably extends radially into the working chamber distal to the piston rod. For example, the first inlet connector extends through the first outer sleeve opening, the first intermediate sleeve opening, and the inner sleeve opening, and opens into the working chamber distal to the piston rod. The second inlet connector, in particular, extends through the second outer sleeve opening and the second intermediate sleeve opening, and opens into the annular chamber between the intermediate sleeve and the inner sleeve.

[0018] The first damping valve device is preferably directly fluidically connected to the working chamber remote from the piston rod and the balancing chamber, while the second damping valve device is in particular directly fluidically connected to the annular chamber and the balancing chamber.The damping valve device comprises a preferably cylindrical damping valve housing.

[0019] The shock absorber preferably has a sealing package that fluidically seals the interior of the outer sleeve on the piston rod side. Opposite the sealing package, at the end remote from the piston rod, the interior of the outer sleeve is preferably fluidically sealed by a bottom piece. Optionally, a bottom valve is arranged on the bottom piece and is mounted on the end of the inner sleeve remote from the piston rod.

[0020] According to a first embodiment, the intermediate cylinder has a first intermediate cylinder opening and a second intermediate cylinder opening. In particular, the intermediate cylinder has exactly two or more intermediate cylinder openings that are configured and arranged to receive corresponding damping valve arrangements. The intermediate cylinder openings, in particular, have a circular cross-section. Preferably, the intermediate cylinder openings, in particular their midpoints, are arranged in a common plane that is perpendicular to the central axis of the outer cylinder. The intermediate cylinder openings are preferably aligned with one another, in particular, arranged coaxially with one another, and preferably have the same diameter and geometry.

[0021] According to another embodiment, the second inlet connector extends through the second intermediate barrel opening. The first intermediate barrel opening is preferably constructed and arranged to receive a first damping valve device, while the second intermediate barrel opening is preferably constructed and arranged to receive a second damping valve device. In particular, the second inlet connector does not extend through the inner barrel.

[0022] According to another embodiment, the second inlet connector opens into the annular chamber between the inner and intermediate cylinders. The second inlet connector is preferably in direct fluidic connection with the annular chamber and the balancing chamber. Preferably, the valve outlet is arranged in the area between the valve housing and the inlet connector. In particular, the valve outlet of the damping valve device is directly fluidically adjacent to the balancing chamber.

[0023] According to another embodiment, the damping valve assemblies are arranged in a common plane that extends perpendicularly to the central longitudinal axis of the shock absorber, in particular, the outer cylinder. The damping valve assemblies are, for example, mounted at the same axial height of the outer cylinder. For example, the damping valve assemblies are arranged coaxially with respect to one another. In particular, each damping valve assembly is arranged in a corresponding plane that extends perpendicularly to the central longitudinal axis of the shock absorber, in particular, the outer cylinder. Preferably, the planes are arranged so as to be axially offset from one another.

[0024] According to another embodiment, the damping valve assemblies are arranged in a common axial section of the outer sleeve. This axial section is, for example, the end region of the outer sleeve facing away from the piston rod. Preferably, this axial section extends from the bottom of the outer sleeve over approximately 10% to 25% of the length of the outer sleeve.

[0025] According to a further embodiment, the center axes of the damping valve arrangements form an angle of 20° to 180°, in particular 60° to 135°, preferably 90° to 120°, with one another in the circumferential direction of the outer sleeve.

[0026] According to another embodiment, the intermediate sleeve extends as far as the end of the inner sleeve remote from the piston rod. Preferably, the intermediate sleeve ends flush with the inner sleeve at the end remote from the piston rod.

[0027] According to another embodiment, the vibration damper comprises a bottom part, which forms the end of the working chamber remote from the piston rod, the end remote from the piston rod, wherein the intermediate cylinder extends axially up to the bottom part. Preferably, the intermediate cylinder rests against the bottom part. The bottom part is preferably connected to the inner cylinder and / or the outer cylinder in a fluid-tight manner. Preferably, the bottom part is pot-shaped.

[0028] According to another embodiment, the shock absorber includes an adapter for mounting the first damping valve device, wherein the adapter has an adapter opening through which the first inlet connector extends. The adapter is preferably cylindrical in shape and arranged coaxially with the outer sleeve. The adapter is particularly completely arranged within the inner sleeve and preferably rests with its radially outer surface against the inner surface of the inner sleeve. In particular, the adapter is connected to the inner sleeve in a fluid-tight manner. The adapter has an adapter opening that is constructed and arranged to receive the first damping valve device, in particular, the first inlet connector. The first inlet connector, for example, extends through the adapter opening and preferably terminates flush with the adapter opening. The adapter is preferably connected to the first inlet connector in a fluid-tight manner. In particular, a sealing device, such as a sealing ring, is arranged between the adapter and the first inlet connector. The sealing device is, for example, arranged in a circumferential groove in the first inlet connector. The shock absorber preferably includes exactly one adapter.

[0029] According to another embodiment, the intermediate cartridge has a first flange area for mounting the first damping valve device and a second flange area for mounting the second damping valve device, wherein the first flange area is fluid-tightly connected to the first inlet connector and the second flange area is fluid-tightly connected to the second inlet connector.

[0030] Preferably, the intermediate sleeve has exactly two or more flange areas, each of which forms one of the intermediate sleeve openings. Each flange area preferably forms a corresponding receptacle for one of the damping valve devices. The flange areas are preferably identical in design. The flange areas preferably surround the intermediate sleeve opening in the circumferential direction.

[0031] In particular, the flange region has a radially outwardly directed collar that delimits a preferably circular intermediate sleeve opening. The collar is preferably cylindrical and, in particular, extends coaxially with the corresponding damping valve arrangement. A radial constriction adjoins the collar radially inward, which forms a diameter constriction of the intermediate sleeve. The diameter constriction reduces the width of the annular chamber between the inner sleeve and the intermediate sleeve and preferably forms a flow restrictor.

[0032] The first flange area is preferably connected to the first inlet connector in a fluid-tight manner. For example, a sealing element, such as a sealing ring, is installed between the first inlet connector and the first flange area. This sealing element is preferably arranged in a circumferential groove in the first inlet connector. The second flange area is particularly connected to the second inlet connector in a fluid-tight manner. Another sealing element, such as a sealing ring, is installed between the second inlet connector and the second flange area. This sealing element is preferably arranged in a circumferential groove in the second inlet connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The invention is explained in more detail below on the basis of a number of exemplary embodiments with reference to the drawings.

[0034] Figure 1 A schematic diagram of a vibration damper according to a first exemplary embodiment is shown in longitudinal section.

[0035] Figure 2 A schematic diagram shows a detailed view of a damping valve arrangement according to an exemplary embodiment in a longitudinal section.

[0036] Figure 3 and 4 The schematic diagrams each show a detailed view of a damping valve arrangement according to a further exemplary embodiment, in a top view. DETAILED DESCRIPTION

[0037] Figure 1 A shock absorber 10 is shown, wherein the shock absorber 10 is a multi-tube shock absorber, for example a twin-tube shock absorber. The shock absorber 10 has an outer tube 12, which forms the outer surface of the shock absorber 10, in particular, the housing. An inner tube 14, which can also be referred to as a shock absorber tube, is arranged coaxially within the outer tube 12. A balancing chamber 16 is formed between the outer tube 12 and the inner tube 14, in particular between the outer tube 12 and the intermediate tube 26. The balancing chamber 16 is preferably at least partially filled with a hydraulic fluid. For example, the balancing chamber 16 is partially filled with gas.

[0038] A working piston 18 connected to a piston rod 20 is arranged within the inner barrel 14 so as to be movable therein, wherein the inner barrel 14 is preferably configured as a guide for the working piston 18. The working piston 18 may include, for example, a valve arrangement (not shown). The working piston 18 divides the interior of the inner barrel 14 into a first working chamber 22 arranged on the piston rod side and a second working chamber 24 arranged on the side facing away from the piston rod. Within the balancing chamber 16, an intermediate barrel 26 is arranged coaxially with the inner barrel 14 and the outer barrel 12 and between the inner and outer barrels.

[0039] The interior of the outer sleeve 12 is fluid-tight on the piston rod side by means of a sealing package 34. Opposite the sealing package 34, at the end facing away from the piston rod, the interior of the outer sleeve 12 is fluid-tight by means of a bottom part 38. A bottom valve is optionally arranged on the bottom part 38, which is mounted, in particular, on the end of the inner sleeve 14 facing away from the piston rod. The bottom valve is, for example, a check valve that allows flow in both directions or only in one direction. The second working chamber 24 is preferably fluidically connected to the balancing chamber 16 via the bottom valve. The piston rod-side ends of the inner sleeve 14 and the outer sleeve 12 are preferably fixed to the sealing package 34. A body connection 36 is connected, for example, to the bottom part, by means of which the shock absorber 10 can be fixed to the vehicle body, in particular to the axle.

[0040] The intermediate cylinder 26 is preferably mounted on the inner cylinder 14 in a fluid-tight manner. For example, the intermediate cylinder 26 is mounted on the inner cylinder 14 by means of two intermediate cylinder mounting elements 42, 44. The intermediate cylinder 26 preferably extends over the entire length of the inner cylinder 14; in particular, the intermediate cylinder 26 has a length corresponding to approximately 90% to 100% of the length of the inner cylinder 14. The first intermediate cylinder mounting element 44 is arranged at the end of the intermediate cylinder 26 facing away from the piston rod, while the second intermediate cylinder mounting element 42 is arranged at the piston rod-side end of the intermediate cylinder 26. The intermediate cylinder mounting elements 42, 44 preferably include two radially inwardly extending constrictions in the circumferential direction. In the region of the constrictions, the diameter of the intermediate cylinder 26 is reduced, so that the intermediate cylinder 26 preferably rests in a fluid-tight manner on the inner cylinder 14. This constriction is followed by a, in particular annular, widening of the intermediate cylinder 26. In the region of the widening, the diameter of the intermediate cylinder 26 increases to the previous diameter outside the constriction. Another constriction adjoins the widening portion axially outward and, for example, forms the end of the intermediate barrel 26. Apart from the intermediate barrel mounting elements 42 and 44, the intermediate barrel 26 preferably has a constant diameter and cross-section. The widening portion is preferably configured such that it forms a closed annular chamber between the intermediate barrel 26 and the inner barrel 14. Within the annular chamber, for example, a sealing element 46, in particular a sealing ring, is arranged. This sealing element rests on the inner barrel 14 and the intermediate barrel 26 and forms a fluid-tight seal therebetween. Preferably, the intermediate barrel mounting elements 42 and 44 each have an annular chamber with a sealing element 46. The intermediate barrel 26 preferably extends to the end of the inner barrel 14 remote from the piston rod and, for example, terminates flush with this end. For example, the intermediate barrel 26 extends axially to the base member 38 and preferably rests thereon.

[0041] An annular chamber 28 is formed between the intermediate cylinder 26 and the inner cylinder 14. At least one through-opening 30 is formed in the inner cylinder 14, fluidically connecting the first working chamber 22 to the annular chamber 28. The through-opening 30 is formed in the first working chamber 22 and, in particular, at the piston rod-side end of the inner cylinder 14. The through-opening 30 is preferably arranged directly below the second intermediate cylinder mounting 42. The through-opening 30 preferably opens into the piston rod-side end of the annular chamber 28. The intermediate cylinder 26 is preferably made of metal.

[0042] Shock absorber 10 preferably includes two damping valve devices 54a, b, wherein hydraulic fluid flows through each damping valve device 54a during a compression phase when the working piston 18 moves in a compression direction D, and hydraulic fluid flows through each other damping valve device 54b during an extension phase when the working piston 18 moves in an extension direction Z. Preferably, first damping valve device 54a is designated as a compression phase valve and, in particular, is configured such that it dampens the movement of the working piston 18 in the compression direction D. In particular, compression phase valve 54a is constructed and arranged such that hydraulic fluid flows through it only when the working piston 18 moves in the compression direction D. Preferably, second damping valve device 54b is designated as an extension phase valve and, in particular, is configured such that it dampens the movement of the working piston 18 in the extension direction Z. In particular, extension phase valve 54b is constructed and arranged such that hydraulic fluid flows through it only when the working piston 18 moves in the extension direction Z.

[0043] The damping valve assemblies 54a, b are, for example, substantially identical in design. They may be, for example, solenoid-controlled valves, pressure-limiting valves, or multi-way valves that allow flow in only one direction. The damping valve assemblies 54a, b are, for example, mounted at the same axial height on the outer sleeve 12. It is also conceivable that the damping valve assemblies 54a, b are mounted at different axial heights. Preferably, the damping valve assemblies 54a, b are arranged in a common plane that extends perpendicularly to the central longitudinal axis of the shock absorber 10, in particular, the outer sleeve 12. In particular, the damping valve assemblies 54a, b are arranged in a common axial section of the outer sleeve 12, wherein this axial section is the end region of the outer sleeve 12 facing away from the piston rod. Preferably, this axial section extends from the bottom of the outer sleeve 12 over approximately 10% to 25% of the length of the outer sleeve 12. Optionally, the damping valve assemblies 54a, b are arranged coaxially with respect to one another.

[0044] The intermediate cylinder 26 has, in particular, two intermediate cylinder openings 56a, b, which are constructed and arranged to receive respective damping valve arrangements 54a, b. The first intermediate cylinder opening 56a is preferably constructed and arranged to receive the first damping valve arrangement 54a, while the second intermediate cylinder opening 56b is preferably constructed and arranged to receive the second damping valve arrangement 54b. Each intermediate cylinder opening 56a, b has, in particular, a circular cross-section.

[0045] The intermediate drum 26 preferably has exactly two or more flange areas 32a, b, which form intermediate drum openings 56a, b. Each flange area 32a preferably forms a corresponding receptacle for one of the damping valve devices 54a, b. For example, the intermediate drum 26 has a first flange area 32a for mounting a first damping valve device 54a, in particular a compression-phase valve, and a second flange area 32b for mounting a second damping valve device 54b, in particular an extension-phase valve. The flange areas 32a, b are preferably identical in design. The flange areas 32a, b preferably form the intermediate drum openings 56a, b and preferably surround the intermediate drum openings 56a, b circumferentially.

[0046] In particular, the flange areas 32a, b have radially outwardly directed collars that delimit preferably circular intermediate sleeve openings 56a, b. The collars are, for example, cylindrical in shape and preferably extend coaxially with the respective damping valve arrangement 54a, b. Radially inwardly adjoining the collars is a radial constriction 48, which forms a diameter constriction of the intermediate sleeve 26. The diameter constriction reduces the width of the annular chamber 28 between the inner sleeve 14 and the intermediate sleeve 26 and preferably forms a flow restrictor.

[0047] The inner drum 14 preferably has an inner drum opening 58 that is designed and arranged to receive the damping valve arrangement 54a, in particular the compression phase valve 54a. The inner drum opening 58 is particularly circular and is preferably arranged coaxially with the first intermediate drum opening 56a. The inner drum 14 preferably has exactly one inner drum opening 58 for receiving the damping valve arrangement 54a.

[0048] The outer sleeve 12 preferably has first and second outer sleeve openings 60a, b, which are designed and arranged to receive the respective damping valve arrangement 54a, b. The outer sleeve openings 60a, b are particularly circular and are preferably arranged coaxially with the respective central sleeve opening 56a, b. The outer sleeve 12 preferably has exactly two outer sleeve openings 60a, b for receiving the respective damping valve arrangement 54a, b.

[0049] The damping valve assemblies 54a, b, for example, have valve housings 50a, b, which form the outer surfaces of the damping valve assemblies 54a, b. The valve housings 50a, b are arranged outside the outer cylinder 12. The valve housings 50a, b are preferably cylindrical and, for example, have multiple different diameters. Coaxially with the valve housings 50a, b, the damping valve assemblies 54a, b have inlet connectors 52a, b, which are, for example, cylindrical and form the fluid inlet into the respective damping valve assemblies 54a, b. The first inlet connector 52a preferably forms the fluid inlet into the first damping valve assembly 54a, while the second inlet connector 52b preferably forms the fluid inlet into the second damping valve assembly 54b. The first inlet connector 52a of the first damping valve assembly 54a preferably extends radially into the working chamber distal to the piston rod. For example, the first inlet connector 52a extends through the first outer cylinder opening 60a, the first intermediate cylinder opening 56a, and the inner cylinder opening 58, and opens into the working chamber 24 distal to the piston rod. The second inlet connector 52 b extends, in particular, through the second outer cylinder opening 60 b and the second intermediate cylinder opening 56 b and opens into the annular chamber 28 .

[0050] The first damping valve device 54 a is preferably fluidically connected to the working chamber 24 remote from the piston rod and to the equilibrium chamber 16 , while the second damping valve device 54 b is fluidically connected to the annular chamber 28 and to the equilibrium chamber 16 .

[0051] The first flange area 32a is preferably connected to the first inlet connector 52a in a fluid-tight manner. For example, a sealing element 62, such as a sealing ring, is installed between the first inlet connector 52a and the first flange area 32a. The sealing element 62 is preferably arranged in a circumferential groove in the first inlet connector 52a. The second flange area 32b is particularly fluid-tightly connected to the second inlet connector 52b. Another sealing element 64, such as a sealing ring, is installed between the second inlet connector 52b and the second flange area 32b. The sealing element 64 is preferably arranged in a circumferential groove in the second inlet connector 52b.

[0052] The shock absorber 10, for example, includes an adapter 40 for mounting a first damping valve assembly 54a, particularly a compression stage valve. The adapter 40 is, for example, cylindrically configured and coaxially arranged with the outer sleeve 12. The adapter 40 is disposed within the inner sleeve 14, preferably with its radially outer surface resting against the inner surface of the inner sleeve 14. In particular, the adapter 40 is fluid-tightly connected to the inner sleeve 14. The adapter 40 has an adapter opening 66 that is configured and arranged to receive the first damping valve assembly 54a, particularly the first inlet connector 52a. The first inlet connector 52a, for example, extends through the adapter opening 66 and preferably terminates flush therewith. The adapter 40 is preferably fluid-tightly connected to the first inlet connector 52a. In particular, a sealing device 68, such as a sealing ring, is disposed between the adapter 40 and the first inlet connector 52a. The sealing device 68 is, for example, disposed in a circumferential groove in the first inlet connector 52a.

[0053] The piston rod 20 has, for example, an optional extension stop which, during a movement in the extension direction Z, is loaded with a spring force via a spring element 42 .

[0054] Figure 3 and Figure 4 Other possible arrangements of the damping valve arrangements 54a, b relative to one another are shown. Figure 3 In the exemplary embodiment of , the first and second damping valve devices 54a, b are arranged, for example, in a common plane, wherein the center axis of each damping valve device 54a, b extends perpendicularly to the center axis of the outer cylinder 12. The center axes of the respective damping valve devices 54a, b form an angle of, for example, 135° with respect to each other. Figure 4 In the exemplary embodiment of the present invention, the damping valve devices 54a, b are arranged coaxially with one another and form an angle of, for example, 180° with one another. For example, the center axes of the damping valve devices 54a, b form an angle of 20° to 180°, in particular 60° to 135°, for example 90° to 120° with one another.

[0055] Reference Signs List

[0056] 10 Shock absorber

[0057] 12 External cylinder

[0058] 14 inner tube

[0059] 16 Balance chamber

[0060] 18 Working piston

[0061] 20 piston rod

[0062] 22 First working chamber / working chamber on the piston rod side

[0063] 24 Second working chamber / working chamber away from the piston rod

[0064] 26 Intermediate tube

[0065] 28 annular chamber

[0066] 30 Through opening

[0067] 32 First flange area

[0068] 32b Second flange area

[0069] 34 Closed packages

[0070] 36 Body connection

[0071] 38 bottom piece

[0072] 40 adapter

[0073] 42 Second intermediate cylinder mounting piece

[0074] 44 First intermediate cylinder mounting piece

[0075] 46 Sealing element

[0076] 48 contraction

[0077] 50a Valve housing of the first damping valve device

[0078] 50b Valve housing of the second damping valve device

[0079] 52a First inlet connector

[0080] 52b Second inlet connector

[0081] 54a First damping valve device / compression stage valve

[0082] 54b Second damping valve unit / extension stage valve

[0083] 56a First intermediate tube opening

[0084] 56b second intermediate tube opening

[0085] 58 internal tube opening

[0086] 60a First outer tube opening

[0087] 60b second outer tube opening

[0088] 62 Sealing element

[0089] 64 Sealing element

[0090] 66 Adapter opening

[0091] 68 sealing device

Claims

1. A shock absorber (10) for a motor vehicle, comprising: an outer cylinder (12) and an inner cylinder (14) arranged coaxially with the outer cylinder, and A working piston (18) is arranged axially movably within the inner cylinder (14), the working piston dividing the interior space of the inner cylinder (14) into a working chamber (22) on the piston rod side and a working chamber (24) remote from the piston rod, The shock absorber (10) comprises a first damping valve device (54a) and a second damping valve device (54b), wherein the first damping valve device comprises a first inlet connector (52a) for supplying hydraulic fluid into the first damping valve device (54a), and the second damping valve device comprises a second inlet connector (52b) for supplying hydraulic fluid into the second damping valve device (54b). It is characterized by: The first inlet connector (52a) extends radially inwardly through the first intermediate barrel opening (56a) and the inner barrel opening (58) into the piston rod-remote working chamber (24).

2. The vibration absorber (10) according to claim 1, wherein: The intermediate barrel (26) has a first intermediate barrel opening (56a) and a second intermediate barrel opening (56b).

3. The vibration absorber (10) according to claim 2, wherein: The second inlet connector (52b) extends through the second intermediate barrel opening (56a).

4. The vibration absorber (10) according to any one of the preceding claims, wherein The second inlet connector (52b) opens into an annular chamber (28) between the inner barrel (14) and the intermediate barrel (26).

5. The vibration absorber (10) according to any one of the preceding claims, wherein The damping valve devices (54a, b) are arranged in a common plane, which extends perpendicularly to a central longitudinal axis of the outer sleeve (12).

6. The vibration absorber (10) according to any one of the preceding claims, wherein The center axes of the damping valve devices (54a, b) form an angle of 20° to 180°, in particular 60° to 135°, preferably 90° to 120° relative to each other in the circumferential direction of the outer sleeve (12).

7. The vibration absorber (10) according to any one of the preceding claims, wherein The intermediate tube (26) extends as far as the end of the inner tube (14) remote from the piston rod.

8. The vibration absorber (10) according to any one of the preceding claims, wherein The shock absorber (10) has a bottom part (38) which forms the end of the working chamber (24) remote from the piston rod, remote from the piston rod, and the intermediate cylinder (26) extends in the axial direction up to the bottom part (38).

9. The vibration absorber (10) according to any one of the preceding claims, wherein The shock absorber (10) has an adapter (40) for mounting the first damping valve device (54a), and the adapter (40) has an adapter opening (66) through which the first inlet connector (52a) extends.

10. The vibration absorber (10) according to any one of the preceding claims, wherein The intermediate cylinder (26) has a first flange area (32a) for mounting the first damping valve device (54a) and a second flange area (32b) for mounting the second damping valve device (54b), wherein the first flange area (32a) is fluid-tightly connected to the first inlet connector (52a) and the second flange area (32b) is fluid-tightly connected to the second inlet connector (52b).

11. The vibration absorber (10) according to any one of the preceding claims, wherein The damping valve devices (54a, b) are mounted in the same axial region of the outer cylinder (12).

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