LU102989B1 - Damping valve device for a vibration damper - Google Patents

Abstract

The present invention relates to a damping valve device (1) for a hydraulic vibration damper (2) for a vehicle, comprising: a drive area (19) and a valve area (9), a damper valve housing (3), with a pipe part (4) which covers the drive area (19) and encloses the valve area (9), the drive area (19) having a coil (8) which is designed such that it generates a magnetic circuit within the damping valve device (1) and with one within the coil (8) axially movably attached anchor (11) cooperates to move the armature (11) in the axial direction, the armature (11) being arranged within a pole tube (7) and the pole tube (7) forming an axial guide of the armature (11), the Valve region (9) has a fluid inlet (29) and a fluid outlet (28) for admitting and discharging a hydraulic fluid into the valve region (9) and a valve block (27) with a plurality of flow passages (20) for conducting the hydraulic fluid, wherein the valve region (9) has a control slide (17) which is mounted movably relative to the valve block (27) in such a way that it moves between a closed position, in which the flow passages (20) are closed by the control slide (17), into an open position, in which the flow passages (20) are free, is movable, the pole tube (7) surrounding the armature (11) and the control slide (17) and having a radial projection (42) which is arranged within the coil (8).

Description

221374P00LU 07/26/2022 LU102989 1/27

Damping valve device for a vibration damper

The invention relates to a damping valve device for a vibration damper, particularly for motor vehicles.

Vibration dampers, especially shock absorbers, are commonly used in

Used in motor vehicles and are between a wheel suspension, in particular one

Axle, and the body of the vehicle to absorb shocks while driving and reduce vibrations. To increase driving comfort and

For driving safety, the damping characteristics of the vibration damper are usually adjustable. For example, this is done via a solenoid valve, via which the flow of the hydraulic fluid within the vibration damper can be adjusted and thus the

Movement of the piston of the vibration damper is made easier or more difficult.

Solenoid valves are, for example, arranged on the outside of the vibration damper tube and thus represent a separate module from the vibration damper tube, which takes up additional space within the vehicle.

From EP2685145A2 a damping valve device is known which is located on the outside

Vibration damper is attached.

Based on this, it is the object of the present invention to reduce the manufacturing costs, in particular the number and complexity of the components, as well as the weight of one

To reduce the damping valve device of a vibration damper, while at the same time preventing failure of the components of the damping valve device.

This task is achieved according to the invention by a damping valve device with

Features of the independent device claim 1 solved. Beneficial

Further training results from the dependent requirements.

A damping valve device for a hydraulic vibration damper for a

Vehicle, in particular a motor vehicle, comprises, according to a first aspect

Invention, for example, a drive area and a valve area. The

221374P00LU 07/26/2022 LU102989 2/27

Damping valve device further comprises a damper valve housing, with a

Pipe part that encloses the drive area and the valve area, whereby the

Drive area has a coil which is designed such that it has a

Magnetic circuit generated within the damping valve device and with an axially movable armature mounted within the coil for axial movement of the armature

Direction interacts. The anchor is arranged within a pole tube, whereby the

Pole tube forms a guide for the anchor. In particular, the pole tube forms an axial

Guide to guide the movement of the armature in the axial direction. The valve portion has a fluid inlet and a fluid outlet for inlet and outlet

Hydraulic fluids in the valve area and a valve block with a plurality of

Flow passages for conducting the hydraulic fluid. The valve area has one

Control slide, which is mounted movably relative to the valve block in such a way that it can move between a closed position, in which the flow passages are closed by the control slide, and an open position, in which the

Flow passages are free and can be moved. The pole tube surrounds the anchor and the

Control slide and has a radial projection which is arranged within the coil. The radial projection serves to reinforce the wall of the pole tube, so that the damping valve device can also be used in shock absorbers with relatively high

Pressing can be used. The reinforcement of the

Wall of the pole tube when using the damping valve device in one

Monotube vibration damper.

In the following, the axial direction is the parallel to the axial center line

Damping valve device, in particular the pipe part of the

Damping valve device, running direction to understand. The term radial direction is understood to mean the direction orthogonal to the axial direction.

A hydraulic vibration damper designed as a single-tube or multi-tube vibration damper

Vibration damper preferably comprises an inner cylinder tube and an outer cylinder tube arranged coaxially thereto, which in particular covers the outer wall of the

Vibration damper forms. Inside the inner cylinder tube is preferably a

Piston attached to a piston rod to be axially movable and divides the inner

Cylinder tube into two work spaces. In particular, the piston has at least two

221374P00LU 07/26/2022 LU102989 3/27

Fluid feedthroughs through which one workspace is connected to the other workspace. An annular space is preferably formed between the inner and outer cylinder tubes, in particular in one

Multi-tube vibration damper, within the annular space and coaxially between the inner and outer cylinder tubes, a center tube is preferably attached, which divides the annular space. The damping valve device is preferably fluidly connected to at least one of the working spaces of the inner cylinder tube and preferably to the center tube and the outer cylinder tube

Vibration damper attached. The vibration damper is preferably completely or partially filled with a hydraulic fluid.

The tube part is preferably designed in such a way that it can be connected to the outer cylinder tube and in particular has a substantially constant, circular shape

Cross section. The tubular part preferably forms the outer housing wall

Damping valve device. In particular, the drive area and the valve area are arranged completely within the tube part, so that the tube part preferably extends in the axial direction beyond the drive area and/or the valve area. It is also conceivable that the drive region is arranged inside the pipe part and the valve region is arranged at least partially or completely outside the pipe part. The tube part is preferably made of a magnetic or magnetizable material.

The drive area preferably comprises an electromagnet, wherein the

Electromagnet, for example, has a coil with a plurality of windings which are arranged on a coil support. The coil carrier is preferably made of a plastic and in particular is essentially hollow cylindrical and arranged coaxially to the tubular part. For example, the coil has a

Plastic material in which the windings and the coil support are fastened, in particular cast, preferably cohesively connected to it. The

Coil is preferably firmly, in particular cohesively, positively and/or non-positively connected to the tubular part. For example, a clearance fit is formed between the pole tube and the coil. The coil is preferably designed and arranged such that it forms a magnetic circuit within the damping valve device

221374P00LU 07/26/2022 LU102989 4/27 generated. Preferably, the coil subjected to an electrical current generates a magnetic flux which flows in a closed path within the

Damping valve device runs. The magnetic circuit includes the elements of the

Damping valve device through which the magnetic generated by the coil

River runs in a closed path.

The armature is arranged within the coil, preferably coaxially therewith. The armature is preferably made of a magnetic or magnetizable material and is in particular part of the magnetic circuit. The anchor preferably has a first cylindrical region, on which a second cylindrical region is located in the axial direction

Area with a smaller diameter relative to the first area connects.

In particular, the pole tube is arranged between the armature and the coil, which is at least partially hollow cylindrical and is coaxial with the coil

Pipe part and the anchor extends. The pole tube is preferably made of a magnetic or magnetizable material and is in particular part of the magnetic circuit.

For example, the anchor is at least partially or completely wrapped with a sliding film, such as a PTFE film, which facilitates the axial movement of the anchor within the pole tube. The pole tube preferably has a hollow cylindrical tube that rests at least partially on the coil, in particular the coil support

Area with preferably a substantially constant cross section.

In particular, the hollow cylindrical region has a substantially constant inner and/or outer diameter, in particular a constant wall thickness.

The hollow cylindrical area preferably forms the guide, in particular axial

Guide, of the anchor, so that the anchor is mounted movably within the pole tube in the axial direction. The hollow cylindrical region of the pole tube preferably extends in the axial direction, preferably in the direction of the upper part of the housing, over the coil and in particular has a base at its end, which

Pole tube completely closed at the front. A cylindrical armature space is preferably formed within the hollow cylindrical region, in which the armature and

Hydraulic fluid are arranged. The hollow cylindrical region of the pole tube is adjoined in the axial direction towards the valve region by a valve-side region which has at least one or a plurality of expansions of the inner diameter and/or

221374P00LU 07/26/2022 LU102989 has 5/27 of the outside diameter. The valve-side region of the pole tube is preferably funnel-shaped, with the funnel expanding in the direction of the valve. The pole tube, in particular the valve-side region of the pole tube, is preferably firmly connected to the tube part, in particular in a form-fitting, non-positive and/or material-locking manner. The pole tube extends, for example, in the axial direction at least partially or completely along the coil

Valve slide and the valve block.

The pole tube, in particular the valve-side area, preferably encloses the

Valve block and/or the control slide, particularly circumferentially. Preferably there is a with between the valve block and/or the control slide and the pole tube

Hydraulic fluid-filled annular space is formed. The control slide is preferably mounted so that it can move in the axial direction relative to the valve block and the pole tube and is arranged coaxially with the tube part and the pole tube. The control slide is preferably in operative connection with the armature, so that the movement of the armature is at least partially or completely coupled to the control slide. The

Control slide preferably has an axial end face that extends in the direction of

Armature points and on which the anchor rests, so that a movement of the anchor is transmitted to the control slide.

The valve block is preferably arranged coaxially with the pole tube and in particular has a cavity which is fluidly connected to the fluid inlet/fluid outlet, so that hydraulic fluid flows into the valve block. A fluid space is preferably formed between the valve block and the pole tube, in which the hydraulic fluid can flow. The valve block is, for example, funnel-shaped and has, for example, a cylindrical region facing the drive unit, which is arranged coaxially to the control slide and preferably has a substantially constant cross section. The control slide preferably surrounds the valve block circumferentially and is movable in the axial direction relative to it

Valve block stored. In the area facing away from the drive unit, the

Valve block, for example, has a funnel-shaped, radial expansion. The valve block is in particular stationary relative to the axially movable control slide and, for example, firmly connected to the pole tube. Preferably the valve block

221374P00LU July 26, 2022 LU102989 6/27 circumferentially and in the axial direction at least partially or completely from the

Pole tube element enclosed, with between the drive-side area of

Valve block and the pole tube element of the control slide is arranged.

Within the valve block there are preferably flow passages, in particular

Passage opening formed through which the hydraulic fluid, in particular from the

Fluid inlet can flow to the fluid outlet. The flow passages are preferably in the cylindrical area enclosed by the control slide

Valve block arranged. The control slide is mounted so that it can move axially in such a way that it completely opens the flow passages in an open position of the damping valve device and completely closes the flow passages in a closed position of the damping valve device. The control slide is mounted in such a way that it can preferably be moved into a variety of intermediate positions in which the flow passages are partially closed. The control slide is preferably biased towards the open position by means of a spring. The

Spring is preferably arranged between the control slide and the valve block and preferably acts on the control slide with an axial direction

Force acting in the drive area.

The pole tube is preferably designed in one piece and/or in one piece and encloses the armature and the control slide, in particular in the circumferential direction, whereby the

Magnetic circuit the tube part, the armature, the coil and the pole tube and for example the

River plate includes. “One-piece” is preferably understood to be made from one piece, in particular a solid block, whereby “one-piece” means a fixed connection between several parts, for example by means of positive locking, frictional locking and/or

Includes material closure. A pole tube designed in one piece or in one piece considerably simplifies the assembly of the damping valve device. A complex assembly of the

Pole tube is no longer necessary. In addition, fasteners are used

Assembling a multi-part pole tube is dispensed with, resulting in one

leads to weight savings. Further weight savings are achieved by:

Pipe part is part of the magnetic circuit, since in this way at least part of the

Coil carrier, especially the outer jacket, can be dispensed with.

For example, the pole tube is made by a machining process, in particular

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Turning or milling. For example, the pole tube is made by casting or

Cold formed.

According to a first embodiment, the projection is annular. An annular projection provides optimal reinforcement of the wall of the pole tube

Circumferential direction and is easy to manufacture.

According to a further embodiment, the annular projection is coaxial with the

Coil arranged. For example, the annular projection is concentric to the

Coil arranged. The annular projection has a diameter which preferably corresponds at most to the outer diameter of the pole tube.

According to a further embodiment, the pole tube has a hollow cylindrical shape

Area that is arranged within the coil and wherein the hollow cylindrical

Area has a circumferential recess and wherein the

Projection is arranged within the recess. For example, the pole tube has a hollow cylindrical region which is arranged within the coil and the hollow cylindrical region has the recess. Preferably extends

Recess in the circumferential direction of the pole tube. The recess is preferably formed between the coil and the armature in the pole tube and is, for example, circular. The recess preferably extends in

Circumferential direction of the pole tube completely in a closed ring around the pole tube or has interruptions. In particular, the recess extends in the radial direction from outside to inside into the pole tube. The depth of the recess

Is preferably smaller than the wall thickness of the pole tube, so that the recess does not form an opening. The recess is in particular completely or partially filled with a material, in particular a magnetically insulating material, such as plastic. For example, the recess is completely or partially filled with ambient air. The recess preferably has a cross section with a valve-side

Area that extends in the radial direction from the inside to the outside in the direction of the

Valve area expands. The pole tube preferably has a conical area in the area of the recess, which serves to introduce the magnetic flux into the armature. In the direction of the upper part of the housing, the area on the valve side is adjoined

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Recess, for example, an area with a rectangular, in particular square, cross section. In the area of the recess, the pole tube is thin-walled, with an annular projection arranged within the recess causing the pole tube to be reinforced in the thin-walled area and thus a

Prevents failure of the damping valve device at high pressures.

According to a further embodiment, the coil is axial via the recess

Direction fixed. The coil preferably has a receptacle with which the

Windings and the coil carrier are firmly connected. In particular, the receptacle is made of a plastic, which is preferably applied at least partially or completely around the coil by means of injection molding. Preferably forms the

Recording the lateral surface of the coil pointing in the direction of the tubular part and rests in particular on the tubular part. The receptacle is, for example, formed in one piece or in one piece with the upper housing part. Preferably, the receptacle is firmly connected to the pipe part, in particular non-positively, cohesively and/or positively. The receptacle preferably has a radially inwardly pointing

Projection that engages in the recess of the pole tube and in particular one

Has a shape that corresponds to the cross section of the recess, so that a positive connection is formed between the receptacle and the pole tube. The

The receptacle of the coil preferably has a valve-side end face which is on the

pole tube is in contact. There is preferably one between the pole tube and the receptacle of the coil

Sealing element, in particular a sealing ring, arranged.

According to a further embodiment, the pole tube has two or more projections. For example, the pole tube has two, three, four or five projections, which are in particular annular.

According to a further embodiment, the projections are arranged coaxially to one another. According to a further embodiment, the projections each have the same outside diameter.

According to a further embodiment, the pole tube extends in the axial direction beyond the coil and the control slide. A one-piece training of one

221374P00LU 07/26/2022 LU102989 9/27 such a pole tube simplifies the manufacturing process and assembly of the

Damping valve device significantly.

For example, the tube part extends in the axial direction over the coil and the

Valve block out. The pipe part preferably forms together with the

Upper housing part the outer wall of the damping valve device. The damping valve housing preferably consists of the upper housing part and the tube part. The

The tube part is preferably connected to the upper housing part and the outer cylinder tube

Vibration damper directly connected.

Preferably, the tube part is connected to the pole tube in a form-fitting, non-positive and/or material-locking manner. The pole tube preferably has a circumferential recess, particularly in the valve-side region, which interacts with a constriction of the tube part to form a positive connection.

The damping valve device has, for example, a flow plate made of a magnetic or magnetizable material, the flow plate resting on the coil, the pole tube and/or the tube part. The flow plate is preferably on the from

The end face of the coil facing away from the valve area is attached and extends in particular around the armature. The magnetic circuit is formed in particular from the coil, the pole tube, the tube part, the armature and the flux plate. The elements of the magnetic circuit are preferably made entirely or partially from a magnetic or magnetizable material. In particular, adjacent elements of the magnetic circuit lie directly against one another in order to ensure that the magnetic flux is as resistance-free as possible.

The damping valve housing has, for example, an upper housing part which is attached to the front side at one end of the tube part, with the pole tube extending from the

Upper housing part extends to the valve block. In the upper housing part there is preferably a plug contact for a power connection of the coil and in particular of the

Electrical lines leading to the coil, such as conductor tracks, sheet metal strips or copper strips, are arranged. The upper housing part preferably forms a cover of the tube part.

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The pole tube is, for example, connected to the valve block by means of a mechanical

Joint connection connected. A mechanical joining connection is preferably understood to mean a connection between two components by means of forming, with at least one of the components being mechanically formed. A connection of the pole tube to the valve block by reshaping the pole tube and/or the valve block enables the pole tube to be easily pre-assembled on the valve block, so that it can be inserted into the tube part together with the valve lock and connected to it.

This significantly reduces assembly time and assembly costs.

The damping valve device has, for example, a sealing element which is in a

Chamber is arranged, the chamber being formed between the pole tube and the tube part and additionally the coil and / or a support ring. The chamber is preferably through the pole tube and the tube part, as well as, for example, additionally

Coil and/or the support element closed. For example, the sealing element is as

O-ring formed.

The invention also includes a vibration damper for a vehicle with a

Damping valve device as described above, wherein the

Vibration damper has an outer cylinder tube and the tube part of the

Damping valve device is connected to the cylinder tube, in particular directly.

Preferably, the cylinder tube is connected to the tube part in a form-fitting, non-positive and/or material-locking manner. In particular, the cylinder tube is connected to the tube part via a fastening means. A comfort valve is preferably arranged in the pipe part, which is in particular hydraulically in series with that described above

Damping valve device is switched.

According to a further embodiment, the vibration damper is designed as a single-tube

Vibration damper formed. A hydraulic vibration damper designed as a single-tube vibration damper preferably comprises a cylinder tube, which in particular forms the outer wall of the vibration damper. Within the

Cylinder tube, a piston is preferably attached to a piston rod in an axially movable manner and divides the cylinder tube into two working spaces. Preferably has one

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Single-tube vibration damper has a hydraulic oil space and a gas space, with a separating piston for separating the gas space from the hydraulic oil space being arranged in the cylinder tube. In particular, the piston has at least two fluid passages through which one working space is connected to the other working space. The

Damping valve device includes, for example, two damping valves, each of which has the previously described components of the damping valve device. Preferably, each damping valve has a working space

Single-tube vibration damper is fluidly connected so that the damping of the

Rebound and compression stages of the vibration damper can be adjusted independently of each other.

Description of the drawings

The invention is explained in more detail below using several exemplary embodiments with reference to the accompanying figures.

Fig. 1 shows a schematic representation of a vibration damper with a

Damping valve device in a side view according to an exemplary embodiment.

Fig. 2 shows a schematic representation of a damping valve device in a

Sectional view according to an exemplary embodiment.

Fig. 3 shows a schematic representation of a damping valve device in a

Sectional view according to a further exemplary embodiment.

Fig. 1 shows a vibration damper 2 for a vehicle chassis, wherein the

Vibration damper 2 includes a damping valve device 1. The

Vibration damper 2 of FIG. 1 is only shown in an external view. The

Vibration damper 2 preferably comprises a cylinder tube which has a hydraulic fluid sealed therein, a piston which is axially movable within the cylinder tube along a cylinder tube axis and which divides the cylinder tube into two

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Working spaces divided, a piston rod that is aligned parallel to the cylinder tube axis and connected to the piston. In particular, the piston has at least two fluid passages through which one working space is connected to the other working space. The vibration damper 2 is, for example, a multi-tube vibration damper. In particular, the

Vibration damper 2 has an inner cylinder tube in which the piston is guided.

For example, the outer cylinder tube 21 is attached coaxially around the inner cylinder tube, with one between the inner and outer cylinder tubes 21

Annular space is formed. Between the inner and outer cylinder tubes 21 and coaxially therewith, a center tube is preferably attached, which divides the annular space. To

Damping the piston movement in at least one, preferably both,

The actuation direction(s) is a damping valve device 1 with at least one of the

Connected workspaces. The damping valve device 1 is preferably on the

Central tube and the outer cylinder tube 21 of the vibration damper 2 are attached. It is also conceivable that the vibration damper 2 is a single-tube

Vibration damper acts, the damping valve device being, for example

Backpack valve is designed.

Fig. 2 shows a damping valve device 1 with a preferably cylindrical

Damping valve housing 3, which comprises a substantially tubular tube part 4 and an upper housing part 5 attached to the tube part 4. One end of the tube part 4 is connected to the cylinder tube 21, not shown in FIG

Vibration damper 2 connected. At the other end of the tube part 4, opposite the cylinder tube 21, the upper housing part 5 is attached, so that the upper housing part 5 preferably closes the tube part 4 at the end. The

Upper housing part 5 has, for example, a circular cylindrical cover section 22, which has a larger diameter than the tube part 4 and protrudes radially beyond the tube part 4. The cover section 22 is adjoined by a hollow cylinder section 23, which has a smaller diameter than the tube part 4, in particular than that

Inner diameter of the pipe part 4, and within the pipe part 4 is arranged coaxially therewith. The upper housing part 5, in particular the hollow cylinder section 23, preferably rests on the inner wall of the tube part 4. As an example, the

Cover section has an annular recess in the direction of the pipe part 4

221374P00LU 07/26/2022 LU102989 13/27 facing side in which the end of the pipe part 4 is received. The pipe part 4 is connected, for example, to the upper housing part 5 via a positive connection 24. The positive connection 24 is formed, for example, by a radial recess in the upper housing part 5, into which a radial narrowing of the pipe part 4 engages. The positive connection 24 is preferably formed on the end of the tubular part 4 facing the upper housing part 5. The upper housing part 5, in particular the cover section 22, has a connection area 25, which has one or more

Connection contacts for an electrical power supply of the damping valve device 1. Preferably the connection contacts are for an electrical

Power supply connected to a drive unit 19.

The damping valve device 1 has, for example, a drive area 19 and a

Valve area 9 on. The drive area 19 is, for example, in the upper one

Housing upper part 5 facing area of the damping valve device 1 and preferably arranged essentially above the valve area 9. The

Drive area 19 preferably includes one designed as an electromagnet

Drive. The electromagnet includes a coil 8 with a plurality of windings made of a current-conducting wire. The coil 8 is preferably arranged within the tube part 4 and concentric to it. An example is the coil 8 within the

Hollow cylinder section 23 of the upper housing part 5 is arranged and rests in particular on the inner wall of the upper housing part 5. In particular, the coil is in that

Upper housing part 5 is cast in, the upper housing part 5 being made of, for example

Plastic, in particular a non-magnetic or only very slightly magnetic material, preferably a magnetic insulator or a material with a high magnetic resistance is formed. The coil includes, for example, one

Coil carrier on which the windings of the coil are wound. The coil 8 at least partially or completely encloses an armature space 26, which extends centrally in the axial direction and concentrically to the tubular part 4. An anchor 11 is mounted so that it can move axially within the anchor space 26. The anchor 11 is preferably cylindrical and has a diameter that is slightly smaller than that

Diameter of the anchor space 26, so that the anchor 11 is preferably mounted so that it can slide in the axial direction. By way of example, the anchor 11 has an upper one

Upper housing part 5 facing the first cylindrical area on which

221374P00LU 07/26/2022 LU102989 14/27 A second cylindrical area is connected on the valve area side, which is arranged coaxially to the first area and has a smaller diameter. The

Anchor space 11 is preferably delimited by a hollow cylinder 16, which is arranged coaxially to and within the tubular part 4. The hollow cylinder 16 preferably has a base and is designed to be open, in particular in the direction of the cylinder tube 21.

The bottom preferably points in the direction of the upper housing part 5 and lies, for example, at least partially against it. The hollow cylinder 16 is preferably made of a magnetizable or magnetic material.

The coil 8 is preferably designed and arranged in such a way that it is at one

Application of current forms a magnetic field which has magnetic field lines which preferably run essentially in the axial direction in the armature space 26. The

Armature 11 is preferably made of a magnetizable or magnetic material and is formed according to the polarity of the coil 8

Magnetic field movable in the axial direction. In particular, a pole part 12 is arranged within the armature space 26, which is hollow cylindrical and is arranged coaxially to the tube part 4. The armature 11, in particular the second cylindrical region of the armature, extends centrally through the pole part 12 in the axial direction

Armature 11. The pole part 12 is preferably made of a magnetizable or magnetic material. The pole part 12 rests in particular on the inner wall of the hollow cylinder 16 and is, for example, firmly connected to it. Between the

An annular space is preferably formed between the pole part 12 and the armature 11, through which a hydraulic fluid in particular can flow.

Circumferentially around the hollow cylinder 16 and concentric to it is one

Flow plate 10 arranged. The flow plate 10 is preferably designed as a hollow cylinder and rests in particular on the outer wall of the hollow cylinder 16. Of

Furthermore, the flux plate 10 lies at least partially on the pipe part 4 and preferably provides a magnetic flux connection between the hollow cylinder 16 and the

Pipe part 4. Preferably, the flux plate 10 rests on the coil 8 and in particular represents a magnetic flux connection between the hollow cylinder 16, the pipe part 4 and / or the coil 8. The flux plate 10 has, for example, at least two

221374P00LU 07/26/2022 LU102989 15/27 opposite and running in the radial direction from outside to inside

Recesses through which the section of the illustration in FIG. 2 runs.

The hollow cylinder 16 is connected in the axial direction and coaxially therewith

Pole tube element 6. The pole tube element 6 and the hollow cylinder 16 together form the pole tube 7, the pole tube 7 being formed in particular in one piece or in one piece. Preferably, the pole tube element 6 is formed in one piece with the hollow cylinder 16 or is firmly connected to it, for example in a form-fitting, non-positive and/or material-locking manner. The hollow cylinder 16 extends at least partially or completely in the axial direction along the coil 8. Preferably, the pole tube element 6, together with the hollow cylinder 16, encloses at least the armature 11, the armature space 26 and that

Pole part 12.

The pole tube 7 has an upper tubular region with, in particular, a constant

Inner diameter, which preferably includes the hollow cylinder 16 and is different from that

Upper housing part extends in the axial direction beyond the anchor 11. The pole tube 7 preferably has a recess 18, which is formed, for example, in a ring-shaped circumference in the pole tube wall. The recess 18 is preferably arranged coaxially with the coil 8 and in particular within the coil 8. The

Recess 18 has, for example, a square cross section. The pole tube 7 further has a projection 42 pointing in the radial direction, which is within the

Coil 8 is arranged. The projection 42 is, for example, annular and is mounted coaxially with the coil 8 within it. The projection 42 is arranged in the recess 18, for example. For example, the projection extends radially

Direction over at least half the depth of the recess 18. It is also conceivable that the projection 42 extends over the entire depth of the recess 18 and preferably the same diameter as the pole tube 7, in particular the upper one

Area of the pole tube 7 has.

The upper tubular region of the pole tube 7 is adjoined in the axial direction by a lower region with an enlarged diameter, with the outer surface of the

Pole tube 7, in particular the pole tube element 6, preferably extends to the tube part 4 and rests at least partially on it. The inner surface of the lower

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The area of the pole tube element 6 at least partially encloses a valve area 9, which is explained in more detail in one of the following sections.

The pole tube element 6 of the pole tube 7 preferably has a plurality of different inner diameters, each of which forms cylindrical spaces of different diameters. The pole tube 7 also has, in particular, a plurality of different outer diameters. In the axial direction from the drive region 19 in the direction of the valve region 9, the pole tube 7 preferably has a first outer diameter, which forms the hollow cylinder 16 and preferably extends along the coil 8. This is followed by a second one

Outer diameter that is larger than the first outer diameter, so that a

Paragraph, in particular an axial end face, is formed in the direction of

Upper housing part 5 has and on which the coil 8 rests at least partially, for example. There is, for example, a chamber 14 between the pole tube 7 and the tube part 4

Receiving a sealing element 13, in particular a sealing ring, is formed. The

Pole tube element 6 is preferably made of a magnetizable or magnetic

material formed.

The coil 8 preferably has an axial direction, in particular along the

Inner wall of the pipe part 4 extending projection 15, which is between the

Pipe part 4 and the pole tube 7 extends and adjoins the chamber 14. The

Pole tube element 6 is preferably connected to the tube part 4 via a positive connection.

The valve area 9 is preferably integrated into a hydraulic circuit, not shown, and is fluidly connected to the vibration damper 2, in particular the working spaces of the vibration damper 2, in particular a single-pipe or

Multi-tube vibration damper, connected. The valve area 9 has an inlet 28 and an outlet 29, the functionality of which depends on the flow direction of the

Damping fluid can be reversed.

The valve area 9 of the damping valve device 1 preferably comprises one

Control slide 17, which is at least partially or completely circumferential

221374P00LU 07/26/2022 LU102989 17/27

Pole tube element 6 is enclosed and in particular is arranged coaxially to this and the tube part 4. The control slide 17 preferably has an axial end face which points in the direction of the armature 11 and on which the armature 11, in particular the lower, second region of the armature 11, rests, so that a movement of the armature 11 is transmitted to the control slide 17. Furthermore, the valve area 9 comprises a valve block 27. The control slide 17 preferably surrounds the valve block 27 circumferentially and is mounted so that it can move in the axial direction relative to the valve block 27. The valve block 27 is in particular funnel-shaped and has, for example, an upper cylindrical region facing the drive unit 19, which is arranged coaxially to the control slide 17. The valve block 27 is in particular stationary relative to the axially movable control slide 17.

Preferably, the valve block 27 is at least partially or completely enclosed circumferentially and in the axial direction by the pole tube element 6, with the control slide 17 being arranged between the upper region of the valve block 27 and the pole tube element 6. The lower region of the valve block 27 is arranged in the radial direction directly adjacent to the pole tube element 6 and preferably lies at least partially against it. Within the valve block 27 are only partially shown

Passage opening and/or flow passages 20 are formed through which the

Damping fluid can flow from the inlet 28 to the outlet 29. The control slide 17 is mounted so that it can move axially in such a way that it is in an open position

Damping valve device 1 completely opens the flow passages 20 and in a closed position of the damping valve device 1

Flow passages 20 completely closed. The control slide 17 can preferably assume a variety of intermediate positions in which the

Flow passages 20 are partially closed. The control slide 17 is preferably opened in the direction of a spring, not shown

Valve position biased, so that the damping valve is open when the coil 8 is de-energized. The spring is preferably between the control slide 17 and the

Valve block 27 is arranged and preferably acts on the control slide with a force acting axially in the direction of the drive region 19. Between the valve block 27 and the pole tube element 6 there is preferably an annular gap 30 for conducting the

Damping fluid formed. The annular gap 30 preferably extends completely

221374P00LU July 26, 2022 LU102989 18/27 around the upper area of the valve block 27 that can be enclosed by the control slide 17 and in particular at least partially or completely around the lower area of the

Valve block 27. The control slide 17 is preferably axially movable within the annular gap 30.

The valve area 9 preferably includes a comfort valve and a solenoid valve, which are hydraulically connected in series with one another. By way of example, the valve block 27 includes two valve bodies. The valve body pointing in the direction of the drive area is, for example, the solenoid valve body, which preferably has the flow passages 20 described above and a plurality of

Flow channels 31 and movable by means of the coil 8

Control slide 17 interacts. In the direction of the cylinder tube 21 of the

Vibration damper 2 is preferably attached to the solenoid valve body

Comfort valve body.

In particular, the fluid drain 29 is formed between the valve block 27 and the pole tube 7. There are preferably one between the pole tube 7 and the valve block 27

A plurality of flow channels 31 are formed. The flow channels 31 are at least partially formed in the valve block 27. The flow channels 31 preferably extend along the pole tube 7, the pole tube 7 preferably having no passage openings, in particular bores, for guiding the damping fluid through the pole tube wall.

The pole tube 7, for example, extends at least partially in the axial direction along the comfort valve body. The end region of the pole tube 7 is preferably mechanically formed in order to form a connection between the pole tube 7 and the valve block 27.

The damping valve device 1 is used for the particularly continuous adjustment of the

Damping of the vibration damper 2. When the vibration damper 2 is in operation, the coil 8 is supplied with electrical current to set the desired damping. This creates a magnetic field whose magnetic field lines are in the

Coil interior and in particular in the armature space 26 essentially in the axial direction

221374P00LU 07/26/2022 LU102989 19/27 expired. The magnetic flux of the magnetic field runs in a magnetic circuit which is formed within the damping valve device 1. The magnetic circuit includes

Components made of materials with low magnetic resistance, preferably made of magnetic or magnetizable material. The magnetic circuit to

Conducting the magnetic field, in particular the magnetic flux, is preferably formed from the flux plate 10, the hollow cylinder 16, the pole tube element 6, the armature 11, the tube part 4 and / or the pole part 12. Depending on the polarity of the magnetic field, the armature 11 is axial Direction moved. The movement of the armature 11 is transmitted to the control slide 17 coupled to the armature 11, so that this

Flow passages 20 of the valve block 27 closes or at least partially opens. 2 shows an example of an open position of the damping valve device 1.

Fig. 3 shows a further embodiment of a damping valve device 1, which is in

Essentially corresponds to that of FIG. 2 with the difference that

Damping valve device 1 of FIG. 3 for attachment to a single-tube

Vibration damper is formed. The damping valve device 1 of FIG. 3 also has a preferably one-piece/one-piece pole tube 7, which comprises a recess 18 with a projection, in particular a reinforcing ring 42, arranged therein.

The damping valve device 1 of FIG. 3 is shown in a partial section. The

Damping valve device 1 of FIG. 3 includes two damping valves as an example, with only the upper one being shown completely. Another damping valve is preferably arranged symmetrically to the upper damping valve. A

Damping valve is preferably fluidly connected to the first working space of the single-tube damper, wherein the second damping valve is preferably fluidly connected to the second working space. This enables an independent

Adjustment of the damping in the rebound and compression stages

Vibration damper. The damping valves of the damping valve device 1 of FIG. 3 are constructed essentially identically, for example. In Fig. 3 is an example

Flow through the upper damping valve is shown, with the inlet 28 preferably being connected to one working space and the outlet 29 to the other working space. Depending on the direction of movement of the piston (rebound/compression stage), the inlet 28 and the outlet 29 are reversed. When reversing the inlet 28 and shown in FIG. 3

221374P00LU 07/26/2022 LU102989 20/27

Flow 29 would flow through the lower damping valve, which is only partially shown.

221374P00LU 07/26/2022 LU102989 21/27

List of reference symbols 1 Damping valve device 2 Vibration damper 3 Damping valve housing 4 Pipe part 5 Upper housing part 6 Pole tube element 7 Pole tube 8 Coil 9 Valve area 10 Flow plate 11 Armature 12 Pole part 13 Sealing element 14 Chamber 15 Projection / support ring 16 Hollow cylinder 17 Control slide 18 Recess 19 Drive unit 20 Flow passages 21 Cylinder tube 22 Cover section 23 hollow cylinder section / Recording 24 Positive connection 25 Connection area 26 Anchor space 27 Valve block 28 Inlet / fluid inlet 29 Outlet / fluid outlet 30 Annular gap 31 Flow channels 42 Projection

Claims (12)

221374P00LU July 26, 2022 LU102989 22/27 patent claims 1. Damping valve device (1) for a hydraulic vibration damper (2) for a vehicle, comprising: a drive area (19) and a valve area (9), a damping valve housing (3) which encloses the drive area (19) and the valve area (9). , wherein the drive region (19) has a coil (8) which is designed such that it generates a magnetic circuit within the damping valve device (1) and with an armature (11) mounted axially movably within the coil (8) for moving the armature (11) interacts in the axial direction, the armature (11) being arranged within a pole tube (7) and the pole tube (7) forming a guide of the armature (11), the valve area (9) having a fluid inlet (28) and a Fluid outlet (29) for inlet and outlet of a hydraulic fluid into the valve area (9) and a valve block (27) with a plurality of flow passages (20) for directing the hydraulic fluid, wherein the valve area (9) has a control slide (17), which is mounted movably relative to the valve block (27) in such a way that it can be moved between a closed position in which the flow passages (20) are closed by the control slide (17) to an open position in which the flow passages (20) are free is, characterized in that the pole tube (7) surrounds the armature (11) and the control slide (17) and has a radial projection (42) which is arranged within the coil (8). 2. Damping valve device (1) according to claim 1, wherein the projection (42) is annular. 3. Damping valve device (1) according to one of the preceding claims, wherein the annular projection (42) is arranged coaxially with the coil (8). 221374P00LU 07/26/2022 LU102989 23/27 4. Damping valve device (1) according to one of the preceding claims, wherein the pole tube (7) has a hollow cylindrical region which is arranged within the coil (8) and wherein the hollow cylindrical region has a recess (18) extending in the circumferential direction and wherein the projection (42) is arranged within the recess (18). 5. Damping valve device (1) according to claim 4, wherein the coil (8) is fixed in the axial direction via the recess (18). 6. Damping valve device (1) according to one of the preceding claims, wherein the pole tube (7) has two or more projections (42). 7. Damping valve device (1) according to claim 6, wherein the projections (42) are arranged coaxially to one another. 8. Damping valve device (1) according to claim 6 or 7, wherein the projections each have the same outside diameter. 9. Damping valve device (1) according to one of the preceding claims, wherein the pole tube (7) extends in the axial direction beyond the coil (8) and the control slide (17). 10. Damping valve device (1) according to one of the preceding claims, wherein the pole tube (7) is formed in one piece and / or in one piece. 11. Vibration damper (2) for a vehicle comprising a damping valve device (1) according to one of the preceding claims, wherein the vibration damper has an outer cylinder tube (21) and wherein the tube part (4) of the damping valve device (1) is connected to the cylinder tube (21). is. 12. Vibration damper (2) according to claim 11, wherein the vibration damper is a single-tube vibration damper.