Vibration damper for a motor vehicle

Abstract

The present invention relates to a vibration damper (10) for a vehicle, comprising a damper tube (14) filled with hydraulic fluid, a working piston (18) connected to a piston rod (20) which is arranged to be movable back and forth within the damper tube (14), wherein the interior of the damper tube (14) is divided by the working piston (18) into a first working chamber (22) and a second working chamber (24), an end stop arrangement (26) with an end stop piston (30) attached to the piston rod (20) and an end stop tube (12) for receiving the end stop piston (30), wherein a connecting element (34) for connecting the damper tube (14) to the end stop tube (12) is arranged between the end stop tube (12) and the damper tube (14), which seals the damper tube (14) fluid-tight on the piston rod side.

Description

[0001] The invention relates to a vibration damper for a motor vehicle with an end stop arrangement.

[0002] From DE102022129427A1, a hydraulic vibration damper with a hydraulic end stop designed as a rebound stop is known. A hydraulic end stop typically serves to provide additional damping in the rebound or compression stage of the vibration damper. In known vibration dampers, an additional piston moves into an end stop chamber or is limited by an end stop buffer, thus generating additional damping when the piston rod moves in the rebound or compression direction. The components interacting during damping at the end positions must typically adhere to very precise manufacturing tolerances and are therefore usually very expensive to manufacture.

[0003] Starting from this premise, the object of the present invention is to provide a vibration damper with an end stop arrangement that is inexpensive to manufacture and easy to assemble.

[0004] This problem is solved according to the invention by a vibration damper having the features of independent device claim 1. Advantageous embodiments are described in the dependent claims.

[0005] A vibration damper for a vehicle comprises, according to a first aspect, a damper tube filled with hydraulic fluid, a working piston connected to a piston rod and arranged to move back and forth within the damper tube, wherein the interior of the damper tube is divided by the working piston into a first working chamber on the piston rod side and a second working chamber further away from the piston rod. The vibration damper also includes an end-stop assembly with an end-stop piston attached to the piston rod and an end-stop tube for receiving the end-stop piston. A connecting element is arranged between the end-stop tube and the damper tube for connecting the damper tube to the end-stop tube, which seals the damper tube fluid-tight on the piston rod side.

[0006] The vibration damper is, for example, a single-tube or a multi-tube vibration damper. For instance, a multi-tube vibration damper for a vehicle comprises an outer tube and an inner tube arranged coaxially to it, wherein a compensating chamber for receiving hydraulic fluid is formed between the outer tube and the inner tube, and a working piston connected to a piston rod, which is arranged to move back and forth within the inner tube. The interior of the inner tube is divided by the working piston into a first working chamber on the piston rod side and a second working chamber furthest from the piston rod. The compensating chamber is preferably at least partially filled with a gas, particularly at its upper end. The outer tube preferably forms at least part of the housing of the vibration damper. The inner surface of the inner tube is preferably designed as a guide for the working piston.The working piston preferably has a valve assembly connecting the first and second working chambers. In a monotube vibration damper, an outer tube is preferably not provided. The inner tube is referred to as the damper tube and, as described above with reference to the inner tube, accommodates the piston rod and the working piston.

[0007] At the end of the damper tube furthest from the piston rod, the compensating chamber and the second working chamber are preferably fluidically sealed by means of a bottom piece. The compensating chamber is preferably fluidically connected to the first or second working chamber via openings in the inner tube. For example, the compensating chamber is sealed to the inner tube by means of a bottom element.

[0008] In a monotube vibration damper, the interior of the damper tube at the end furthest from the piston rod is, for example, also fluidically sealed by means of a base piece or, optionally, by means of an axially movable sealing element. The sealing element preferably separates a gas chamber adjoining it in the axial direction from the working chamber filled with hydraulic fluid.

[0009] In the following description, the term "vibration damper" refers to both multi-tube and mono-tube dampers, where the damper tube is the inner tube of a multi-tube damper. Movement in the compression direction refers to movement towards the base of the damper in the area furthest from the piston rod, and movement in the tension direction refers to the opposite movement towards the area of ​​the damper closer to the piston rod. It is also conceivable that the shock absorber could be installed in a vehicle in such a way that these directions are reversed.

[0010] A connecting element for joining the damper tube and the end stop tube, which simultaneously seals the damper tube fluid-tight on the piston rod side, offers the advantage that a separate sealing package is unnecessary. The sealing package for the fluid-tight seal of the damper tube is functionally integrated into the connecting element. This allows for more cost-effective manufacturing of the connecting element and further simplifies the assembly of the vibration damper, as the number of components is reduced.

[0011] The vibration damper comprises, in particular, an end-stop arrangement, which preferably includes an end-stop tube that is, in particular, mounted coaxially to the damper tube. Specifically, the end-stop tube is attached to the piston-rod end of the damper tube by means of the connecting element. The end-stop tube has, in particular, the same outer diameter and / or inner diameter as the damper tube. The interior of the end-stop tube is preferably filled with a gas, such as, in particular, air.

[0012] The end-stop arrangement includes, in particular, an end-stop piston attached to the piston rod. The end-stop piston is arranged within the end-stop tube and is axially movable relative to the end-stop tube. The inner wall of the end-stop tube is optionally designed to axially guide the end-stop piston. In particular, the end-stop piston has a smaller diameter than the inner diameter of the end-stop tube, so that a gap is formed between the inner wall of the end-stop tube and the outer circumference of the end-stop piston, through which the gas, in particular air, can flow. Optionally, the end-stop piston has a plurality of passages through which the gas can flow and bears, in particular, against the inner wall of the end-stop tube. Preferably, the end-stop piston is designed such that its flow resistance during axial movement within the end-stop tube is negligible.

[0013] According to a first embodiment, the connecting element is permanently, and in particular detachably, connected to the damper tube and the end stop tube. Preferably, the connecting element is connected to the damper tube and the end stop tube by means of a positive-locking, force-locking, and / or material-locking connection. Preferably, the connecting element is screwed to the damper tube and / or the end stop tube.

[0014] According to a further embodiment, the connecting element is tubular and has a larger diameter than the damper tube and / or the end stop tube. Preferably, the connecting element, with its inner diameter, in particular its inner wall, abuts the outer diameter, in particular the outer wall, of the damper tube and the end stop tube. The connecting element is preferably arranged coaxially with the damper tube and the end stop tube.

[0015] According to a further embodiment, the connecting element has a first connection area for connecting the connecting element to the end stop tube and a second connection area for connecting the connecting element to the damper tube. The first and / or the second connection area is / are preferably designed as an internal thread. The damper tube preferably has an external thread formed at the end of the damper tube facing the end stop tube, which interacts with the internal thread of the connecting element, in particular with the second connection area. The end stop tube preferably has an external thread formed at the end of the end stop tube facing the damper tube, which interacts with the internal thread of the connecting element, in particular with the first connection area. The damper tube is preferably sealed fluid-tight by means of the connecting element.Preferably, the connecting element has a recess, particularly annular in shape, which is formed, for example, on the inside of the tube wall. A sealing element, such as a sealing ring, is preferably arranged in this recess and bears against the damper tube. The sealing element is arranged, in particular, axially between the second connection area and the separating plate.

[0016] According to a further embodiment, the connecting element has a separating plate for fluidically separating the damper tube from the end stop tube. The separating plate is preferably a reduction in the inner diameter formed on the inner wall of the connecting element. In particular, the connecting element has a substantially tubular tube wall and the separating plate extending radially inwards from it. The separating plate is preferably formed integrally with the tube wall. The separating plate is preferably arranged and designed such that it separates the interior of the damper tube from the interior of the end stop tube. The separating plate preferably extends radially inwards from the tube wall to the piston rod. Preferably, the separating plate is annular in shape, with the piston rod extending axially through the separating plate and being mounted to be axially movable relative to it.Preferably, the inner wall of the separating plate is at least partially designed as an axial guide for the piston rod. The separating plate forms at least partially the axial end of the end stop tube and the damper tube.

[0017] According to another embodiment, the connecting element is formed in one piece or as a single unit. The connecting element is preferably manufactured by a machining process, such as milling. A one-piece or single-unit connecting element is more cost-effective in both manufacturing and assembly of the vibration damper.

[0018] According to a further embodiment, the damper tube has a plurality of recesses at the end facing the connecting element. The recesses are preferably formed in the end face of the damper tube. In particular, the recesses are semicircular and extend axially from the end face of the damper tube. Preferably, the recesses are uniformly spaced from one another and are formed circumferentially around the damper tube, and in particular, they are identical.

[0019] According to a further embodiment, the connecting element has a fluid connection for introducing and / or draining hydraulic fluid into the damper tube. The fluid connection is preferably connectable to a hydraulic line and, in particular, to a hydraulic pump.

[0020] According to a further embodiment, the fluid connection comprises a connecting nozzle and a ring line. The connecting nozzle preferably extends radially and opens into the ring line. The ring line is preferably arranged circumferentially around the end of the damper tube on the connecting element side and preferably includes a particularly semi-shell-shaped, annular bulge in the inner wall of the tube wall of the connecting element.

[0021] According to another embodiment, the ring line is arranged at the same axial height as the recesses in the damper tube, so that hydraulic fluid can flow through the connecting nozzle into the ring line and then through the recesses into the interior of the damper tube and vice versa.

[0022] According to a further embodiment, the connecting element has a drain channel that extends from the interior of the end stop tube through the connecting element to the outside. The drain channel is preferably designed and arranged for draining liquids, in particular water, from the interior of the end stop tube. The drain channel preferably extends through the tube wall of the connecting element from the interior of the end stop tube to the outside, outside both the connecting element and the end stop tube. Preferably, the drain channel extends at least partially or completely through the partition. The drain channel serves in particular to drain water that may penetrate into the end stop tube between the piston rod and the tube itself.In the installation position of the vibration damper inside the vehicle, the drain channel preferably extends at least partially or completely downwards in a vertical direction, so that the water can drain out of the interior of the end stop tube due to gravity.

[0023] According to a further embodiment, the interior of the end stop tube is filled with air. According to a further embodiment, the end stop tube has at least one vent opening through which ambient air can flow. In particular, the end stop tube has a plurality of vent openings extending through the wall of the end stop tube. Air can flow from the interior of the end stop tube to the outside or in the opposite direction through the vent opening. The vent opening is, for example, slot-shaped or elongated and extends in the axial direction. Preferably, the vent opening extends over the entire length or at least 60% to 90%, in particular 70% to 80%, of the length of the end stop tube. Preferably, the vent opening is spaced apart from the axial ends of the end stop tube and preferably extends along the central region of the end stop tube.

[0024] According to a further embodiment, the piston rod is formed in two parts and comprises a first piston rod section and a second piston rod section. Preferably, the piston rod has exclusively two piston rod sections. The first piston rod section extends from the end stop tube and, for example, has an attachment area for mounting the piston rod to a vehicle wheel or vehicle body. The first piston rod section is preferably arranged in the direction of tension relative to the second piston rod section. In particular, the first piston rod section has a larger diameter than the second piston rod section. The second piston rod section preferably connects to the first piston rod section in the direction of compression and is preferably firmly connected to it, in particular by means of a positive-locking, friction-locking, and / or material-locking connection.Preferably, the first piston rod section is screwed to the second piston rod section. The second piston rod section preferably extends from the end stop chamber into the damper tube. In particular, the working piston is attached to the second piston rod section.

[0025] A sealing ring for fluid-tight sealing is preferably installed between the piston rod, particularly between the second piston rod section, and the connecting element. The sealing ring is preferably arranged in a recess in the inner wall of the separating plate. Preferably, a support ring is installed between the connecting element and the damper tube, which preferably rests on the end face of the damper tube. In particular, the support ring is pressed axially between the damper tube and the connecting element, especially between the end face of the damper tube and the separating plate. Preferably, the support ring also rests against the sealing ring. The support ring has, for example, an axial projection that rests against the sealing ring and holds it in position. The support ring rests, in particular, at least partially against the piston rod and preferably forms a sliding surface for the second piston rod section.The connecting element also optionally features a wiper that is arranged between the piston rod and the connecting element and is pre-tensioned, in particular in the direction of the piston rod, so that dirt particles are wiped off by the wiper when the piston rod moves in an axial direction and do not enter the interior of the damper tube.

[0026] According to a further embodiment, the end-stop piston is attached, in particular clamped, between the first and second piston rod sections. Specifically, the end-stop piston rests against the end face of the first piston rod section. The second piston rod section preferably has an axial contact surface against which the end-stop piston rests, preferably attached. The axial contact surface is preferably formed at a diaphragmatic constriction of the second piston rod section. The second piston rod section is optionally at least partially hollow-cylindrical.

[0027] According to a further embodiment, the end stop arrangement comprises a compression stop and a tension stop. The compression stop serves as an end stop, in particular as a contact surface for the end stop piston, in the compression stage when the piston rod moves in the compression direction. The compression stop is arranged at the end of the end stop tube facing in the compression direction, in particular at the end face of the end stop tube facing in the compression direction. The compression stop is, for example, annular and arranged coaxially with the end stop tube. Preferably, the compression stop is made of an elastic material, in particular rubber, foam, or Celasto. The tension stop serves as an end stop, in particular as a contact surface for the end stop piston, in the tension stage when the piston rod moves in the tension direction.The pull stop is arranged at the end of the end stop tube facing in the direction of pull, in particular at the end face of the end stop tube facing in the direction of pull. The pull stop is preferably annular and arranged coaxially with the end stop tube. Preferably, the pull stop is made of an elastic material, in particular rubber, foam, or Celasto. Description of the drawings

[0028] The invention is explained in more detail below with reference to several exemplary embodiments and the accompanying figures. Fig. Figure 1 shows a schematic representation of a vibration damper in a longitudinal section view according to an exemplary embodiment. Fig. Figure 2 shows a schematic representation of a partial section of a vibration damper in a longitudinal sectional view according to an exemplary embodiment. Fig. Figure 3 shows a schematic representation of a partial section of a vibration damper in a longitudinal section view according to a further embodiment.

[0029] Fig. Figure 1 shows a vibration damper 10, which is exemplified as a monotube vibration damper. The vibration damper 10 has a damper tube 14. Inside the damper tube 14, a working piston 18 connected to a piston rod 20 is arranged such that it is movable within the damper tube 14, the damper tube 14 preferably serving as a guide for the working piston 18. The working piston 18 preferably has a valve assembly. For example, the valve assembly comprises a rebound valve for damping the piston movement during the rebound stage and a compression valve for damping the piston movement during the compression stage. Preferably, the valves are each formed by a through-hole in the piston and a valve disc assembly.The working piston 18 divides the interior of the damper tube 14 into a first working chamber 22, which is located towards the piston rod, and a second working chamber 24, which is located further away from the piston rod. The piston rod 20 is preferably connectable to the vehicle body or the vehicle wheel at its end protruding from the damper tube 14.

[0030] At the end of the damper tube 14 furthest from the piston rod, the interior of the damper tube 14, in particular the second working chamber 24, is fluidly sealed by means of a bottom piece 36. It is also conceivable that a gas space within the damper tube 14 at the end furthest from the piston rod is separated by a separating piston.

[0031] The Fig. 2 and Fig.Figures 3 each show a section of a vibration damper 10 with an end stop arrangement 26. The vibration damper 10 includes, by way of example, an end stop arrangement 26. The end stop arrangement 26 preferably has an end stop tube 12, which is, in particular, mounted coaxially to the damper tube 14. In particular, the end stop tube 12 is attached to the piston rod end of the damper tube 14 by means of a connecting element 34. The end stop tube 12 has, by way of example, the same outer diameter and / or inner diameter as the damper tube 14. The interior of the end stop tube 12 is preferably filled with a gas, such as, in particular, air. The end stop tube 12 has, in particular, at least one vent opening 16 or a plurality of vent openings 16, which extends through the wall of the end stop tube 12.Air can flow from the interior of the end stop tube 12 to the outside or in the opposite direction through the vent 16. The vent 16 is, for example, slot-shaped or elongated and extends in the axial direction. Preferably, the vent 16 extends over the entire length or at least 60% to 90%, and in particular 70% to 80%, of the length of the end stop tube 12. Preferably, the vent 16 is spaced apart from the axial ends of the end stop tube 12 and preferably extends along the central region of the end stop tube 12.

[0032] The end-stop assembly 26 also includes an end-stop piston 30, which is attached to the piston rod 20. The end-stop piston 30 is arranged inside the end-stop tube 12 and is axially movable relative to the end-stop tube 12. The inner wall of the end-stop tube 12 is optionally designed to axially guide the end-stop piston 30. In particular, the end-stop piston 30 has a smaller diameter than the inner diameter of the end-stop tube 12, so that a gap is formed between the inner wall of the end-stop tube 12 and the outer circumference of the end-stop piston 30, through which the gas, in particular air, can flow. Optionally, the end-stop piston 30 has a plurality of passages through which the gas can flow and bears in particular against the inner wall of the end-stop tube 12.Preferably, the end stop piston 30 is designed such that its flow resistance during axial movement within the end stop tube 12 is negligible.

[0033] The end stop arrangement 26 further comprises a compression stop 44 and a tension stop 46. The compression stop 44 serves as an end stop, in particular as a contact surface for the end stop piston 30, in the compression stage, when the piston rod 20 moves in the compression direction D. The compression stop 44 is arranged at the end of the end stop tube 12 facing in the compression direction, in particular at the end face of the end stop tube 12 facing in the compression direction. The compression stop 44 is, for example, annular and arranged coaxially with the end stop tube 12. Preferably, the compression stop 44 is made of an elastic material, in particular rubber, foam, or Celasto. The tension stop 46 serves as an end stop, in particular as a contact surface for the end stop piston 30, in the tension stage, when the piston rod 20 moves in the tension direction Z.The pull stop 46 is arranged at the end of the end stop tube 12 that points in the direction of pull, in particular at the end face of the end stop tube 12 that points in the direction of pull. The pull stop 46 is, for example, ring-shaped and arranged coaxially with the end stop tube 12. Preferably, the pull stop 46 is made of an elastic material, in particular rubber, foam, or Celasto.

[0034] The piston rod 20 is preferably designed in two parts and comprises a first piston rod section 48 and a second piston rod section 50. The first piston rod section 48 extends from the end stop tube 12 and, for example, has a mounting area for attaching the piston rod 20 to a vehicle wheel or vehicle body. The first piston rod section 48 is preferably arranged in the tensile direction relative to the second piston rod section 50. In particular, the first piston rod section 48 has a larger diameter than the second piston rod section 50. The second piston rod section 50 preferably connects to the first piston rod section 48 in the compressive direction D and is preferably firmly connected to it, in particular by means of a positive-locking, friction-locking, and / or material-locking connection.Preferably, the first piston rod section 48 is screwed to the second piston rod section 50. The second piston rod section 50 preferably extends from the end stop chamber 12 into the damper tube 14. In particular, the working piston 18 is attached to the second piston rod section 50. The end stop piston 30 is preferably attached between the first piston rod section 48 and the second piston rod section 50. By way of example, the end stop piston 30 rests against the end face of the first piston rod section 48. The second piston rod section 50 preferably has an axial contact surface against which the end stop piston 30 rests, and preferably is attached. The axial contact surface is preferably formed at a diameter constriction of the second piston rod section 50. In particular, the end stop piston 30 is clamped between the first and the second piston rod sections 48 and 50.The second piston rod section 50 is, by way of example, at least partially hollow cylindrical in design.

[0035] The vibration damper 10 also includes a connecting element 34, which is arranged between the end stop tube 12 and the damper tube 14. The connecting element 34 is preferably designed and arranged such that it connects the damper tube 14 to the end stop tube 12. By way of example, the connecting element 34 is fixedly connected to the end stop tube 12 and the damper tube 14, preferably by means of a force-fit, positive-fit, and / or material-fit connection. Preferably, the connecting element 34 is detachably connected to the damper tube 14 and / or the end stop tube 12. In particular, the connecting element 34 is substantially tubular and is mounted coaxially to the damper tube 14 and the end stop tube 12. The connecting element 34 preferably has a larger outer diameter than the damper tube 14 and the end stop tube 12.Preferably, the connecting element 34, with its inner diameter, and in particular its inner wall, abuts the outer diameter, and in particular the outer wall, of the damper tube 14 and the end stop tube 12. By way of example, the connecting element 34 has an internal thread for connecting itself to the damper tube 14 and / or the end stop tube 12. Preferably, the connecting element 34 has a first connection area 52 for connecting itself to the end stop tube 12 and a second connection area 54 for connecting itself to the damper tube 14. The first and second connection areas 52 and 54 are preferably designed as internal threads.The damper tube 14 preferably has an external thread formed at the end of the damper tube 14 facing the end stop tube 12, which interacts with the internal thread of the connecting element 34, in particular with the second connection area 54. The end stop tube 12 preferably has an external thread formed at the end of the end stop tube 12 facing the damper tube 14, which interacts with the internal thread of the connecting element 34, in particular with the first connection area 52.

[0036] The connecting element 34 preferably has a separating plate 56, in particular a reduction in inner diameter, between the damper tube 14 and the end stop tube 12. In particular, the connecting element 34 has a substantially tubular tube wall 58 and the separating plate 56 extending radially inwards thereto. The separating plate 56 is preferably formed integrally with the tube wall 58. The separating plate 56 is preferably arranged and designed such that it separates the interior of the damper tube 14 from the interior of the end stop tube 12. The separating plate 56 preferably extends radially inwards from the tube wall 58 to the piston rod 20, in particular to the second piston rod section 50. Preferably, the separating plate 56 is annular in shape, with the piston rod 20 extending axially through the separating plate 56 and being mounted to be axially movable relative to it.Preferably, the inner wall of the separating plate 56 serves at least partially as an axial guide for the piston rod 20, in particular for the second piston rod section 50. The separating plate 56 forms at least partially the axial end of the end stop tube 12 and the damper tube 14.

[0037] The damper tube 14 is preferably sealed fluid-tight by means of the connecting element 34. Preferably, the connecting element 34 has a recess 60, which is preferably annular and is formed, for example, in the inside of the tube wall 58. A sealing element, such as a sealing ring 62, is preferably arranged in this recess 60 and bears against the damper tube 14. The sealing element 62 is preferably arranged axially between the second connection area 54 and the separating plate 56.

[0038] The damper tube 14 comprises a plurality of recesses 64 in its end face at the end facing the connecting element. The recesses 64 are, for example, semicircular and extend axially from the end face of the damper tube 14. Preferably, the recesses are uniformly spaced from one another and are formed circumferentially around the damper tube 14, and in particular, are identical.

[0039] The connecting element 34 further preferably comprises a fluid connection 66 for introducing and / or discharging hydraulic fluid into the damper tube 14. The fluid connection 66 is preferably connectable to a hydraulic line and, in particular, to a hydraulic pump. The fluid connection 66 exemplarily comprises a connecting nozzle 68 and a ring line 70. The connecting nozzle 68 preferably extends radially and opens into the ring line 70. The ring line 70 is preferably arranged circumferentially around the end of the damper tube 14 on the connecting element side and preferably comprises a semi-shell-shaped annular bulge in the inner wall of the tube wall 58 of the connecting element 34.Preferably, the ring line is arranged at the same axial height as the recesses 64 in the damper tube 14, so that hydraulic fluid can flow through the connecting nozzle 68 into the ring line 70 and then through the recesses 64 into the interior of the damper tube 14 and vice versa.

[0040] A sealing ring 72 is preferably provided between the piston rod, in particular between the second piston rod section 50, and the connecting element 34 for a fluid-tight seal. The sealing ring 72 is, for example, arranged in a recess in the inner wall of the separating plate 56. A support ring 74 is, for example, provided between the connecting element 34 and the damper tube 14, preferably resting on the end face of the damper tube 14. In particular, the support ring 74 is pressed axially between the damper tube 14 and the connecting element 34, in particular between the end face of the damper tube 14 and the separating plate 56. Preferably, the support ring 74 also bears against the sealing ring 72. The support ring 74 has, for example, an axial projection that bears against the sealing ring 72 and holds it in position.The support ring 74 bears, in particular at least partially, against the piston rod 20 and preferably forms a sliding surface for the second piston rod section 50. The connecting element 34 also optionally has a wiper 76, which is arranged between the piston rod 20 and the connecting element 34 and is, in particular, pre-tensioned in the direction of the piston rod 20, so that dirt particles are wiped off by the wiper when the piston rod 20 moves in the axial direction and do not enter the interior of the damper tube 14.

[0041] The connecting element 34 further includes, by way of example, at least one drain channel 78 for draining liquids, in particular water, from the interior of the end stop tube 12. The drain channel 78 preferably extends through the tube wall 58 of the connecting element 34 from the interior of the end stop tube 12 to the outside, outside the connecting element 34 and the end stop tube 12. Preferably, the drain channel 78 extends at least partially or completely through the partition 56. The drain channel 78 serves in particular to drain water that can penetrate between the piston rod 20 and the end stop tube 12 from the interior of the end stop tube 12. In the installed position of the vibration damper inside the vehicle, the drain channel 78 preferably extends at least partially or completely downwards in a vertical direction, so that the water can drain out of the interior of the end stop tube 12 by gravity. Reference symbol list 10 vibration dampers 12 End stop tube 14 Damper tube / inner tube 16. Ventilation opening 18 working pistons 20 piston rod 22 first workroom 24 second workroom 26 End stop arrangement 30 end stop pistons 34 Connecting element 36 bottom piece 44 Pressure stop 46 Pull stop 48 first piston rod section 50 second piston rod section 52 first connection area 54 second connection area 56 Dividing floor 58 Pipe wall 60 recess 62 Sealing ring 64 Exclusion 66 Fluid connection 68 connection spigots 70 ring main 72 Sealing ring 74 Support ring 76 wipers 78 Drainage channel Z direction of travel D Pressure direction QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 102022129427A1

[0002]

Claims

[1] Vibration damper (10), for a vehicle, comprising: - a damper tube filled with hydraulic fluid (14) - a working piston (18) connected to a piston rod (20), which is arranged to be movable back and forth inside the damper tube (14), wherein the interior of the damper tube (14) is divided by the working piston (18) into a working chamber (22) on the piston rod side and a working chamber (24) further away from the piston rod, - an end stop arrangement (26) with an end stop piston (30) attached to the piston rod (20) and an end stop tube (12) for receiving the end stop piston (30), - characterized by , that A connecting element (34) is arranged between the end stop tube (12) and the damper tube (14) to connect the damper tube (14) to the end stop tube (12), which seals the damper tube (14) fluid-tight on the piston rod side. [2] Vibration damper (10) according to claim 1, wherein the connecting element (34) is fixedly, in particular detachably, connected to the damper tube (14) and the end stop tube (12). [3] Vibration damper (10) according to one of the preceding claims, wherein the connecting element (34) is tubular and has a larger diameter than the damper tube (14) and / or the end stop tube (12). [4] Vibration damper (10) according to one of the preceding claims, wherein the connecting element (34) has a first connecting area (52) for connecting the connecting element (34) to the end stop tube (12) and a second connecting area (54) for connecting the connecting element (34) to the damper tube (14). [5] Vibration damper (10) according to one of the preceding claims, wherein the connecting element (34) has a separating plate (56) for fluidic separation of the damper tube (14) from the end stop tube (12). [6] Vibration damper (10) according to one of the preceding claims, wherein the connecting element (34) is formed in one piece or as a single unit. [7] Vibration damper (10) according to one of the preceding claims, wherein the damper tube (14) has a plurality of recesses (64) at the end on the connecting element side. [8] Vibration damper (10) according to one of the preceding claims, wherein the connecting element (34) has a fluid connection (66) for letting hydraulic fluid into and / or letting it out of the damper tube (14). [9] Vibration damper (10) according to claim 8, wherein the fluid connection (66) comprises a connection nozzle (68) and a ring line (70). [10] Vibration damper (10) according to claim 9, wherein the ring line (70) and the recesses (64) are arranged at the same axial height. [11] Vibration damper (10) according to one of the preceding claims, wherein the connecting element (34) has a drain channel (78) extending from the interior of the end stop tube (12) through the connecting element (34) to the outside. [12] Vibration damper (10) according to one of the preceding claims, wherein the interior of the end stop tube (12) is filled with air. [13] Vibration damper (10) according to one of the preceding claims, wherein the end stop tube (12) has at least one venting passage (16) through which ambient air can flow. [14] Vibration damper (10) according to one of the preceding claims, wherein the piston rod (20) is formed in two parts and has a first piston rod section (48) and a second piston rod section (50). [15] Vibration damper (10) according to one of the preceding claims, wherein the end stop piston (30) is attached, in particular clamped, between the first and the second piston rod section (48, 50). [16] Vibration damper (10) according to one of the preceding claims, wherein the end stop arrangement (26) comprises a pressure stop (44) and a pull stop (46).

Images