Damping valve device for a damper

Abstract

The invention comprises a damping valve arrangement (1) for a hydraulic damper (2) of a vehicle, comprising a drive region (19) and a valve region (9), a damping valve housing (3) having a tubular portion (4) surrounding the drive region (19) and the valve region (9), the drive region (19) having a coil (8), the invention relates to a damping valve device (1) which is designed such that it generates a magnetic circuit in the damping valve device (1) and interacts with an armature (11) mounted in an axially movable manner in a coil (8) in order to move the armature (11) in the axial direction, the armature (11) being arranged in a pole tube (7) and the pole tube (7) forming a guide of the armature (11), the valve region (9) has a fluid inlet (28) and a fluid outlet (29) for flowing the hydraulic fluid into and out of the valve region (9), and has a valve block (27) with a plurality of flow channels (20) for conducting the hydraulic fluid, the valve region (9) having a control slide (17) which is movably mounted relative to the valve block (27) such that it can be moved between a closed position and an open position, the flow channel (20) has a closed position in which the flow channel (20) is closed by the control slide (17) and an open position in which the flow channel (20) is open, an annular space (30) filled with hydraulic fluid is defined by the control slide (17), the pole tube (7) and the valve block, and the annular space (30) has at least two different outer diameters.

Description

Technical Field

[0001] The invention relates to a damping valve device for a shock absorber, in particular for a motor vehicle shock absorber. Background Art

[0002] Shock absorbers, in particular impact energy absorbers, are usually used in motor vehicles and are installed between the wheel suspension, in particular the axle, and the vehicle body in order to cushion impacts and reduce vibrations during driving. In order to increase driving comfort and safety, the damping characteristics of the shock absorbers are usually adjustable. This is achieved, for example, by means of a solenoid valve, by which the flow of hydraulic fluid in the shock absorber can be adjusted, thereby promoting or hindering the movement of the shock absorber's piston.

[0003] The solenoid valve is arranged, for example, outside the shock absorber cartridge and thus forms a module separate from the shock absorber cartridge, which takes up additional installation space in the vehicle. In a solenoid valve, a control slide is usually moved on a magnet arrangement, thereby releasing or closing a flow channel for the hydraulic fluid. In this case, hydraulic eddies often occur in the outflow region, which, for example, cause regions with low pressure and thus generate suction acting on the control slide. This leads, for example, to a closing force acting on the control slide, making it difficult to control the control slide in a targeted manner.

[0004] A damping valve arrangement is known from EP 2 685 145 A2, which is mounted outside the shock absorber. Summary of the invention

[0005] Starting from this, the object of the present invention is to optimize the control of a damping valve arrangement and to reduce the production costs of a damping valve arrangement of a shock absorber, in particular to reduce the number and complexity of components, the assembly time and the weight.

[0006] This object is achieved according to the invention by a damping valve device having the features of independent device claim 1. Advantageous further developments are revealed in the dependent claims.

[0007] According to a first aspect of the present invention, a damping valve device for a hydraulic shock absorber of a vehicle, in particular a motor vehicle, comprises a drive region and a valve region. In addition, the damping valve device comprises a damper valve housing having a tubular portion surrounding the drive region and the valve region, wherein the drive region has a coil, which is configured so that it generates a magnetic circuit in the damping valve device and cooperates with an armature mounted axially movably in the coil so that the armature moves in the axial direction. The armature is arranged in a pole tube, wherein the pole tube forms a guide for the armature. In particular, the pole tube forms an axial guide for guiding the movement of the armature in the axial direction. The valve region has a fluid inlet and a fluid outlet for allowing hydraulic fluid to enter and leave the valve region and a valve block having a plurality of flow channels for guiding the hydraulic fluid. The valve region has a control slide, which is movably mounted relative to the valve block so that the control slide can move between a closed position and an open position, in which the flow channel is closed by the control slide, and in which the flow channel is open. The damping valve device has an annular space filled with a hydraulic fluid, which is bounded by the control slide, the pole tube and the valve block and has at least two different outer diameters. Preferably, the annular space has a first annular space area and a second annular space area, wherein the first annular space area is bounded by the control slide and the second annular space area includes a flow duct formed between the valve block and the pole tube. The first and second annular spaces are preferably directly adjacent to each other, wherein the first annular space is connected outwardly in the axial direction of the damping valve device and the second annular space is connected inwardly in the axial direction, i.e. in the direction of the cylinder barrel of the shock absorber. The outer diameter of the annular space corresponds in particular to the inner diameter of the pole tube.

[0008] The annular space is particularly designed such that during operation of the damping valve device and when damping fluid flows through the annular space, eddies are generated in the annular space, which eddies exert a force on the control slide, which force points in the direction of the open position of the control slide. Ideally, the annular space is designed such that during operation of the damping valve device, the hydraulic forces are balanced in the axial direction and therefore no hydraulic forces act on the control slide, and the control slide is moved only or substantially by means of the coil.

[0009] According to a first embodiment, the annular space has a first annular space region with a first outer diameter and a second annular space region with a second outer diameter, wherein the second outer diameter is greater than the first outer diameter. The second annular space region preferably adjoins the first annular space region in the direction of the fluid outlet. Preferably, the first annular space region with the first outer diameter extends at least partially or completely around a flow channel formed in the valve block. The first annular space region is in particular arranged coaxially with the region of the valve block that can be covered by the control slide.

[0010] According to another embodiment, the first outer diameter is constant over the first annular space region, while the second outer diameter varies over the second annular space region. Preferably, the second annular space region extends over a length extending in the axial direction. The outer diameter of the second annular space region is not constant over this length and preferably varies continuously. The second annular space region preferably extends at least partially around a second region of the flow channel of the valve block, in which a flow duct is configured. Preferably, the second annular space region is at least partially defined by the flow duct, in particular constituted by the flow duct.

[0011] According to another embodiment, preferably, in the open position of the control slide, the first annular space region is defined by the control slide and the second annular space region comprises a flow duct configured between the valve block and the pole tube. The maximum outer diameter of the second annular space region preferably corresponds to the outer diameter of the flow duct. In particular, the second annular space has a minimum outer diameter that is greater than or equal to the outer diameter of the first annular space region.

[0012] According to a further embodiment, the second annular space region has a maximum outer diameter which corresponds to the outer diameter of the flow duct.

[0013] According to a further embodiment, the second annular space region has a minimum outer diameter corresponding to the first outer diameter of the first annular space region.

[0014] According to a further embodiment, the variation of the outer diameter of the second annular space segment between the minimum outer diameter and the maximum outer diameter corresponds to a mathematical function, preferably to a pitch circle segment. In particular, the outer diameter varies continuously over the length of the second annular space segment.

[0015] According to a further embodiment, the first annular space region has an inner diameter, wherein a ratio of the outer diameter to the inner diameter is 0.7 to 0.95, in particular 0.8 to 0.9.

[0016] According to a further embodiment, the second annular space region (44) has an inner diameter, wherein the ratio of the outer diameter to the inner diameter is 0.7 to 0.95, in particular 0.8 to 0.9.

[0017] According to another embodiment, the ratio of the inner diameter to the maximum outer diameter of the second annular space region corresponds to less than or equal to 0.51.

[0018] According to another embodiment, the ratio of the inner diameter of the flow duct to the outer diameter of the flow duct is 0.6 to 1.1, preferably 0.7 to 1.02.

[0019] According to a further embodiment, a plurality of flow ducts are formed between the pole tube and the valve block, said flow ducts extending at least partially in radial and axial directions.

[0020] The above-described configuration of the annular space brings about compensation of the closing force acting on the control slide during operation of the damping valve device, so that precise and simple actuation of the control slide by the magnetic force of the coil is possible.

[0021] The axial direction is understood to be a direction extending parallel to the axial centerline of the damping valve device, in particular to the axial centerline of the tubular portion of the damping valve device. The radial direction is understood to be a direction extending orthogonally to the axial direction.

[0022] The hydraulic shock absorber preferably comprises an inner cylinder and an outer cylinder, which is arranged coaxially with the inner cylinder and in particular forms the outer wall of the shock absorber. In the inner cylinder, the piston is preferably mounted axially movably on a piston rod and divides the inner cylinder into two working spaces. In particular, the piston has at least two fluid passages, one of which is connected to the other via these fluid passages. An annular space is preferably constructed between the inner cylinder and the outer cylinder, wherein a central cylinder that divides the annular space is preferably mounted in the annular space and coaxially between the inner cylinder and the outer cylinder. The damping valve device is preferably connected to at least one of the working spaces of the inner cylinder fluid and is preferably mounted on the central cylinder and the outer cylinder of the shock absorber. The shock absorber is preferably completely or partially filled with hydraulic fluid.

[0023] The tubular section is preferably designed so that it can be connected to an external cylinder and in particular has a substantially constant circular cross section. The tubular section preferably forms a housing wall of the damping valve device. In particular, the drive region and the valve region are completely arranged in the tubular section, so that the tubular section preferably extends beyond the drive region and / or the valve region in the axial direction. The valve region is preferably arranged in the region of the tubular section facing the external cylinder of the shock absorber, wherein the drive region is arranged in the region of the tubular section facing away from the external cylinder of the shock absorber. The tubular section is preferably composed of a magnetic or magnetizable material.

[0024] The drive region preferably comprises an electromagnet, wherein the electromagnet comprises, for example, a coil with a plurality of windings which are arranged on a coil support. The coil support preferably consists of a plastic material and is in particular substantially hollow-cylindrical in shape and is arranged coaxially with the tubular portion.

[0025] The coil is preferably fixedly connected to the tubular part, in particular connected in a material-locking, form-locking and / or force-locking manner. For example, a clearance fit is formed between the pole tube and the coil. The coil is preferably designed and arranged such that it generates a magnetic circuit in the damping valve device. Preferably, the coil, to which an electric current is applied, generates a magnetic flux that travels in a closed path in the damping valve device. The magnetic circuit includes those elements of the damping valve device through which the magnetic flux generated by the coil travels in a closed path.

[0026] The armature is preferably arranged in the coil coaxially with the coil. The armature is preferably composed of a magnetic or magnetizable material, and is in particular a part of the magnetic circuit. Preferably, the armature has a cylindrical first region, and a cylindrical second region is connected to the first region in the axial direction, and the second region has a smaller diameter than the first region. In particular, the pole tube is arranged between the armature and the coil, and the pole tube is at least partially hollow cylindrically constructed and extends coaxially with the coil, the tubular part and the armature. The pole tube is preferably composed of a magnetic or magnetizable material and is in particular a part of the magnetic circuit. For example, the armature is at least partially or completely wrapped with a sliding film, such as a PTFE film, so that the axial movement of the armature in the pole tube becomes easy. The pole tube preferably has a hollow cylindrical region, which is at least partially against the coil, in particular the coil support and preferably has a substantially constant cross-section. In particular, the hollow cylindrical region has a substantially constant inner diameter and / or outer diameter, in particular a constant wall thickness.

[0027] The hollow cylindrical region preferably constitutes a guide for the armature, in particular an axial guide, so that the armature is movably mounted in the pole tube in the axial direction. The hollow cylindrical region of the pole tube preferably extends beyond the coil in the axial direction, preferably in the direction of the upper part of the housing, and in particular has a bottom that completely closes the pole tube at the end side at its end. A cylindrical armature space is preferably constructed in the hollow cylindrical region, in which the armature and the hydraulic fluid are arranged. A valve side region is connected to the hollow cylindrical region of the pole tube in the axial direction pointing to the valve region, and the valve side region has at least one or more widenings of the inner diameter and / or outer diameter. The valve side region of the pole tube is preferably configured in a funnel shape, wherein the funnel widens in the direction of the valve. The pole tube, in particular the valve side region of the pole tube, is preferably fixedly connected to the tubular part, in particular connected in a form-locked, force-locked and / or material-locked manner. The pole tube, for example, extends at least partially or completely along the coil, the valve slide and the valve block in the axial direction.

[0028] The pole tube, in particular the valve side region, preferably surrounds the valve block and / or the control slide, in particular in the circumferential direction. Preferably, an annular space filled with a hydraulic fluid is formed between the valve block and / or the control slide and the pole tube. The control slide is preferably mounted movably in the axial direction relative to the valve block and the pole tube and is arranged coaxially with the tubular part and the pole tube. The control slide is preferably operatively connected to 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, which points in the direction of the armature and against which the armature rests, so that the movement of the armature is transmitted to the control slide.

[0029] The valve block is preferably arranged coaxially with the pole tube and in particular has a cavity connected to the fluid inlet / fluid outlet fluid so that the hydraulic fluid flows into the valve block. A fluid space is preferably constructed 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 with the control slide and preferably has a substantially constant cross-section. The control slide preferably surrounds the valve block in the circumferential direction and is supported movably relative to the valve block in the axial direction. On the area facing away from the drive unit, the valve block has, for example, a funnel-shaped radial widening. The valve block is particularly fixedly mounted relative to the axially movable control slide and, for example, fixedly connected to the pole tube. Preferably, the valve block is at least partially or completely surrounded by the pole tube element in the circumferential direction and in the axial direction, wherein the control slide is arranged between the drive side area of ​​the valve block and the pole tube element.

[0030] A flow channel, in particular a through opening, is preferably constructed in the valve block, through which the hydraulic fluid can flow, in particular from the fluid inlet to the fluid outlet. The flow channel is preferably arranged in a cylindrical area of ​​the valve block surrounded by a control slide. The control slide is mounted axially movably so that the control slide completely releases the flow channel in the open position of the damping valve device and completely closes the flow channel in the closed position of the damping valve device. The control slide is supported in such a way that the control slide can preferably be moved to a plurality of intermediate positions in which the flow channel is partially closed. The control slide is preferably preloaded in the direction of the open position by means of a spring. The spring is preferably arranged between the control slide and the valve block and preferably exerts a force on the control slide that acts axially in the direction of the drive region.

[0031] For example, the valve block has a cylindrical first region and a cylindrical second region connected to the first region, wherein the second region has a larger diameter than the first region, and the flow duct is constructed in the second region. The flow channel is particularly arranged in the first region. Preferably, the pole tube is abutted against the second region of the valve block. For example, the pole tube only abuts against the second region of the valve block and is particularly spaced apart from the first region. The second region, for example, has a circumferential surface pointing radially outward and a convex shoulder surface pointing axially in the direction of the first region. The convex shoulder surface preferably abuts against the pole tube. The first region of the valve block is particularly arranged coaxially with the control slide. The first region can preferably be completely or partially surrounded by the control slide. The flow channel is preferably a circular hole in the valve block, particularly a circular hole in the wall of the first region of the valve block.

[0032] The flow duct is preferably formed in the second region of the valve block and is in particular open in the direction of the pole tube, so that the flow duct is respectively formed between the inner surface of the pole tube and the surface of the valve block pointing radially outward. The flow duct preferably extends from the shoulder surface to the circumferential surface and in particular forms a recess, preferably a projection, in the shoulder surface and the circumferential surface. The direction of extension of the flow duct preferably has an axial component and a radial component. This allows an optimized flow of the damping fluid to be achieved.

[0033] For example, the flow duct preferably extends continuously at an angle of 10° to 80°, in particular 20° to 60°, preferably 30° to 50°, relative to the axial direction. For example, the number of flow ducts corresponds to the number of flow channels. It is also conceivable to provide more flow ducts than flow channels, or to provide more flow channels than flow ducts. For example, at least one flow duct is arranged aligned with one of the flow channels. Preferably, each flow duct is arranged aligned with a respective one of the flow channels. For example, at least two flow channels are arranged at different height levels. The arrangement of the flow channels at different height levels causes the flow channels to be opened / closed by the control slide in a predetermined sequence. This makes it possible to achieve an optimized distribution of the lateral forces acting on the control slide during the switching process.

[0034] Preferably, the flow channels are arranged evenly spaced apart from one another in the circumferential direction of the first region of the valve block. For example, at least two directly adjacent flow channels are arranged at respectively different height levels. In particular, all flow channels are arranged at respectively different height levels. The height level is preferably understood to be the distance between the center of the respective flow channel and a specific cross section of the damping valve device. This is understood in particular to be the axial distance between the center of the respective flow channel and the shoulder surface of the second region of the valve block.

[0035] In particular, at least two flow channels are arranged at the same height level. This enables simultaneous opening of the flow channels by means of the control slide and optimizes the force distribution of the force acting on the control slide during the switching process of the damping valve. For example, the flow channels that are circumferentially opposite to each other on the valve block are arranged at the same height level. Preferably, the valve block has four, six, eight or ten flow channels, which are arranged circumferentially around the first area of ​​the valve block, and in particular, the corresponding adjacent flow channels are arranged at an angle of 90°, 60°, 45° or 36° offset from each other around the central axis of the valve block. The flow channels that are opposite to each other are arranged offset by 180° from each other. The simultaneous opening / closing of the relative flow channels optimizes the force distribution of the force acting on the control slide during the switching process of the damping valve. Alternatively, the flow channels that are circumferentially opposite to each other on the valve block are arranged at different height levels.

[0036] For example, flow channels that are circumferentially opposite to each other on the valve block have a height difference that is smaller than the height difference of the corresponding directly adjacent flow channels. This causes the flow channels that are opposite to each other to be opened / closed directly one after another. For example, at least two flow channels have different diameters. According to another embodiment, at least two flow channels have different geometries. Preferably, all flow channels have different diameters and / or geometries. This enables an optimal adjustment of the force acting on the control slide during the switching process of the damping valve.

[0037] The pole tube is preferably constructed in one piece. "In one piece" is preferably understood to be constructed from a single piece, especially a solid block, wherein "one piece" includes a fixed connection between multiple parts, for example, by means of a form-locking, force-locking and / or material-locking connection. A pole tube constructed in one piece or in one piece significantly simplifies the assembly of the damping valve device. It is no longer necessary to assemble the pole tube in a complicated manner. In addition, fastening devices for assembling multi-piece pole tubes are omitted, which leads to weight reduction. Since the tubular part is part of the magnetic circuit, further weight reduction is achieved because at least a part of the coil support, especially the housing, can be omitted in this way. For example, the pole tube is manufactured by a cutting process, especially turning or milling. In particular, the pole tube is manufactured by casting or cold forming.

[0038] The damping valve device, for example, has a sealing element arranged in a chamber, wherein the chamber is constructed between the pole tube and the tubular part and additionally the coil and / or the support ring. Preferably, the chamber is closed by the pole tube and the tubular part and additionally by the coil and / or the support element. The chamber is preferably constructed to accommodate a sealing element, in particular a sealing ring. Preferably, the chamber is annularly constructed and in particular has a rectangular cross section. The chamber is in particular completely closed and is defined by the pole tube, the tubular part and the coil and / or the support ring. A sealing element, which is preferably a sealing ring, is installed in the chamber. Preferably, the sealing element at least rests on the pole tube and the tubular part and is in particular used for sealing so that no hydraulic fluid enters the coil from the valve area. In particular, the sealing element additionally rests on a step of the pole tube.

[0039] The chamber for accommodating the sealing element formed between the pole tube and the tubular part and additionally the coil and / or the support ring enables simple mounting of the sealing element on the pole tube. In particular, damage to the sealing element formed as a sealing ring is avoided, since this can be mounted largely in the unstressed state.

[0040] For example, the sealing element is configured as an O-ring. Preferably, the sealing element is composed of a plastic material, in particular an elastomer. The sealing element is in particular annularly configured and preferably has a round, in particular circular cross section. Preferably, the cross-sectional diameter of the sealing ring is greater than the cross-sectional width of the chamber, so that the sealing ring preferably abuts against at least three inner surfaces of the chamber.

[0041] In particular, the pole tube has a radial step adjacent to the chamber. Preferably, the radial step forms a radial widening of the pole tube relative to a region of the pole tube that is directly adjacent in the direction of the housing top. Preferably, the pole tube has a plurality of different outer diameters, wherein the outer diameter of the pole tube decreases in particular from the chamber in the direction of the housing top. Preferably, the outer diameter of the pole tube in the chamber is greater than or equal to the outer diameter of a region of the pole tube that extends from the chamber in the direction of the housing top. This makes it easier to push the sealing ring onto the pole tube.

[0042] In the axial direction from the drive region in the direction of the valve region, the pole tube preferably has a first outer diameter, which is arranged inside the coil. A second outer diameter, for example, which is larger than the first outer diameter, follows the first outer diameter, so that a step, in particular an axial end face, is formed, which points in the direction of the upper part of the housing and against which the coil preferably at least partially rests. The second outer diameter is preferably spaced apart from the inner diameter of the tubular part, so that a chamber is formed between the pole tube and the tubular part. Preferably, a third outer diameter of the pole tube follows the second outer diameter, which is larger than the first outer diameter and the second outer diameter and preferably substantially corresponds to the inner diameter of the tubular part, so that the pole tube with the third outer diameter rests on the tubular part. An axial end face is preferably formed between the second outer diameter and the third outer diameter, which points in the direction of the upper part of the housing and defines the chamber.

[0043] For example, the coil has a projection extending in the axial direction and adjacent to the chamber. Preferably, the coil has a receiving portion, and the winding and the coil support are fixedly connected to the receiving portion. In particular, the receiving portion is composed of a plastic material, which is preferably applied at least partially or completely around the winding and the coil support by injection molding. Preferably, the plastic material is injected onto the winding and the coil support. Preferably, the receiving portion forms the side of the coil pointing in the direction of the tubular part and is particularly close to the tubular part. The receiving portion is, for example, constructed in one piece or in one piece with the upper part of the housing. Preferably, the receiving portion is connected to the tubular part via a clearance fit, or is fixedly connected to the tubular part, especially force-locked, material-locked and / or form-locked. The coil preferably has a projection extending in the axial direction, especially along the inner wall of the tubular part, which extends between the tubular part and the pole part and is adjacent to the chamber. The projection is preferably made of plastic material. The projection is preferably constructed in the receiving portion of the coil or the coil support. The end face of the projection pointing in the direction of the valve preferably constitutes the limit of the chamber. Preferably, the pole tube and the tubular part are connected to each other via a form-locking connection, in particular via a bayonet connection. The form-locking connection, for example, has at least one axial recess configured in the pole tube, which leads into the chamber. The form-locking connection is in particular a bayonet connection. For example, the pole tube has a plurality of recesses, which are in particular configured in a hook shape. Each recess, for example, comprises an area extending in particular in the axial direction and an area extending in the radial direction connected to the area. Preferably, the corresponding radial contraction of the tubular part is embedded in the recess. The recess is preferably a radial depression, which is configured in the outer surface of the pole tube that rests on the tubular part. Preferably, the recess extends into the chamber and in particular forms an interruption of the contact surface of the sealing element. In this case, the sealing element 13 preferably has a recess and a projection, wherein the projection is embedded in the recess of the pole tube 7 and, for example, constitutes a form-locking connection.

[0044] The damping valve device has, for example, a support ring arranged separately from the coil. Preferably, the support ring at least partially rests on the coil with its outer surface. The support ring is preferably annular in shape and has, for example, a rectangular cross section. In particular, the support ring 15 rests with its outer surface on the inner side of the tubular part and with its inner surface on the outer surface of the pole tube. The end face of the support ring pointing in the direction of the valve is in particular adjacent to the chamber. The support ring is preferably fixedly connected to the coil, the pole tube and / or the tubular part. Preferably, the support ring forms a contact surface for the sealing element. The protrusion of the coil is, for example, alternatively arranged to the support ring or arranged together with the support ring.

[0045] For example, the pole tube has a hollow cylindrical area arranged in the coil, and the hollow cylindrical area has a recess extending in the circumferential direction. The recess is preferably constructed in the pole tube between the coil and the armature and is, for example, annular. Preferably, the recess extends completely around the pole tube in a closed ring in the circumferential direction of the pole tube, or the recess has an interruption. In particular, the recess extends from the outside to the inside in the radial direction into the pole tube. The depth of the recess is preferably less than the wall thickness of the pole tube, so that the recess does not constitute an opening. The recess is especially completely or partially filled with material, especially magnetic insulation material, such as plastic material. For example, the recess is completely or partially filled with ambient air. The recess preferably has a cross-section with a valve side area, which widens from the inside to the outside in the direction of the valve area in the radial direction. The pole tube preferably has a conical area in the area of ​​the recess, which is used to introduce magnetic flux into the armature. In the direction of the upper part of the housing, a region with a rectangular, especially square cross-section is connected to the valve side area of ​​the recess, for example.

[0046] The coil is preferably fixed in the axial direction via the recess. The coil receptacle preferably has a radially inwardly directed projection which engages in the recess of the pole tube and in particular has a shape corresponding to the cross section of the recess, so that a positive connection is formed between the receptacle and the pole tube.

[0047] In particular, the tubular part is constructed in one piece or in one piece. The tubular part is preferably constructed from a single piece, for example cast, and is processed in particular by means of a cutting process, for example turning, laser or milling. For example, the tubular part is manufactured by cold forming.

[0048] Preferably, the tubular portion extends beyond the coil and the valve block in the axial direction. The tubular portion preferably forms an outer wall of the damping valve device together with the housing upper part. Preferably, the damping valve housing is composed of the housing upper part and the tubular portion. The tubular portion is preferably directly connected to the housing upper part and the cylinder barrel outside the shock absorber.

[0049] For example, the tubular part is connected to the pole tube in a form-fitting, force-fitting and / or materially locking manner. Preferably, the pole tube has a circumferential recess, especially in the valve-side region, which cooperates with the constriction of the tubular part to form a form-fitting connection.

[0050] For example, the pole tube is one-piece and / or one-piece and surrounds the armature and the control slide. According to another embodiment, the pole tube extends beyond the valve block in the axial direction. The valve block and the control slide are preferably completely surrounded by the pole tube in the circumferential direction and in the axial direction.

[0051] Preferably, the damping valve device has a flux plate made of a magnetic or magnetizable material, wherein the flux plate rests on the coil, the pole tube and / or the tubular section. The flux plate is preferably mounted on the end side of the coil facing away from the valve region and in particular extends around the armature.

[0052] In particular, the magnetic circuit is composed of a coil, a pole tube, a tubular part, an armature and a flux plate. The elements of the magnetic circuit are preferably composed completely or partially of magnetic or magnetizable material. In particular, adjacent elements of the magnetic circuit are directly adjacent to each other in order to ensure a magnetic flux that is as free of impedance as possible.

[0053] For example, the flux plate is designed in the shape of an annular disk and has, for example, at least one radial recess. For example, the flux plate has a plurality of recesses pointing radially from the outside to the inside, which are in particular spaced evenly apart from one another. Preferably, the recesses extend radially into the flux plate over approximately one third to one half of the radius of the flux plate.

[0054] According to another embodiment, the damping valve housing has a housing top part which is mounted on the end side of one end of the tubular part, wherein the pole tube extends from the housing top part to the valve block. Plug contacts for current connections of the coil are preferably arranged in the housing top part, and in particular electrical lines, such as conductor tracks, sheet metal strips or copper sheets, are arranged from the plug contacts to the coil. The housing top part preferably forms a cover for the tubular part.

[0055] The pole tube is connected to the valve block, for example, by means of a mechanical joint connection. A mechanical joint connection is preferably understood to be a connection of two components by means of forming, wherein at least one of the components is mechanically formed. The connection of the pole tube to the valve block by forming the pole tube and / or the valve block allows the pole tube to be easily preassembled on the valve block so that the pole tube can be inserted together with the valve block into the tubular section and connected to the tubular section. This significantly reduces assembly time and assembly costs.

[0056] The mechanical joint connection comprises, for example, a plastic deformation of the pole tube, such as a curling and / or crimping of the pole tube. The end region of the pole tube is preferably mechanically shaped in order to form a mechanical joint connection between the pole tube and the valve block. In particular, a prestressing element, such as a spring blade or a leaf spring, is arranged between the pole tube and the valve block. The prestressing element is particularly designed such that the prestressing element exerts an axial spring force on the pole tube and preferably prestresses the pole tube relative to the valve block. For example, the pole tube has a shaped edge, which is produced by means of a plastic deformation of the pole tube, wherein the prestressing element rests on this shaped edge. Preferably, the prestressing element rests on the valve block, in particular on the comfort valve body.

[0057] The present invention also includes a shock absorber for a vehicle, which has a damping valve device as described above, wherein the shock absorber has an external cylinder and the tubular part of the damping valve device is in particular directly connected to the cylinder. Preferably, the cylinder is connected to the tubular part in a form-locking, force-locking and / or material-locking manner. In particular, the cylinder is connected to the tubular part via a fastening device. A comfort valve (or shock absorbing valve) is preferably arranged in the tubular part, which is in particular hydraulically connected in series with the damping valve device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The invention is explained in more detail below with reference to the accompanying drawings using a number of exemplary embodiments, in which:

[0059] Figure 1 A schematic diagram showing a shock absorber with a damping valve arrangement according to an exemplary embodiment is shown in a side view;

[0060] Figure 2 a schematic diagram showing a damping valve arrangement according to an exemplary embodiment in cross-section; and

[0061] Figure 3 A schematic diagram of an annular space is shown in cross-section according to an exemplary embodiment. DETAILED DESCRIPTION

[0062] Figure 1 A shock absorber 2 for a vehicle chassis is shown, the shock absorber 2 comprising a damping valve arrangement 1 . Figure 1 The shock absorber 2 is shown only in an external view. The shock absorber 2 preferably comprises a cylinder, a piston and a piston rod, the cylinder having a hydraulic fluid contained in the cylinder in a sealed manner, the piston being able to move axially along the cylinder axis in the cylinder and dividing the cylinder into two working spaces, and the piston rod being oriented parallel to the cylinder 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 shock absorber 2 is, for example, a multi-tube shock absorber. In particular, the shock absorber 2 has an inner cylinder in which the piston is guided. For example, the outer cylinder 21 is coaxially mounted around the inner cylinder, wherein an annular space is constructed between the inner cylinder and the outer cylinder 21. A central cylinder connection is preferably mounted coaxially between the inner cylinder and the outer cylinder 21 to separate the annular space. In order to damp the piston movement in at least one, preferably two actuation directions, the damping valve device 1 is connected to at least one of the working spaces. The damping valve device 1 is preferably mounted on a central cylinder and an outer cylinder 21 of the shock absorber 2 .

[0063] Figure 2The damping valve device 1 is shown, which has a preferably cylindrical damping valve housing 3, which comprises a substantially tubular tubular part 4 and a housing upper part 5 mounted on the tubular part 4. The tubular part 4 is connected with one end of the shock absorber 2 at the Figure 2 The housing upper part 5 is connected to the cylinder 21 (not shown). The housing upper part 5 is mounted on the other end of the tubular part 4 opposite to the cylinder 21, so that the housing upper part 5 preferably closes the tubular part 4 at the end side. The housing upper part 5 has a cover section 22, for example, which is cylindrical and has a larger diameter than the tubular part 4 and protrudes radially beyond the tubular part 4. A hollow cylindrical section 23 is connected to the cover section 22, which has a smaller diameter than the tubular part 4, especially a smaller diameter than the inner diameter of the tubular part 4, and is arranged coaxially with the tubular part in the tubular part 4. The housing upper part 5, in particular the hollow cylindrical section 23, preferably rests on the inner wall of the tubular part 4. For example, the cover section has an annular recess on one side pointing in the direction of the tubular part 4, and the end of the tubular part 4 is accommodated in the annular recess. The tubular part 4 is connected to the housing upper part 5, for example, via a form-locking connection 24. The form-fit connection 24 is formed, for example, by a radial recess in the housing upper part 5, into which the radial constriction of the tubular part 4 engages. The form-fit connection 24 is preferably formed at the end of the tubular part 4 facing the housing upper part 5. The housing upper part 5, in particular the cover section 22, has a connection area 25 with one or more connection contacts for a power supply of the damping valve device 1. Preferably, the connection contacts for the power supply are connected to the drive unit 19.

[0064] The damping valve device 1 has, for example, a drive region 19 and a valve region 9. The drive region 19 is, for example, arranged in the upper region of the damping valve device 1 facing the housing upper part 5, and is preferably arranged substantially above the valve region 9. The drive region 19 preferably includes a drive configured as an electromagnet. The electromagnet includes a coil 8 having a plurality of windings made of current conductors. The coil 8 is preferably arranged in the tubular part 4 and arranged concentrically with the tubular part. The coil 8 is, for example, arranged in the hollow cylindrical section 23 of the housing upper part 5 and is particularly close to the inner wall of the housing upper part 5. In particular, the coil 8 is cast into the housing upper part 5, wherein the housing upper part 5 is, for example, made of plastic, in particular a non-magnetic or only very slightly magnetic material, preferably a magnetic insulator or a material with high magnetic resistance. For example, the coil includes a coil support on which the winding of the coil is wound. The coil 8 at least partially or completely surrounds the armature space 26, which extends centrally in the axial direction and concentrically with the tubular part 4. The armature 11 is supported in the armature space 26 so as to be axially movable. The armature 11 is preferably cylindrically constructed and the diameter of the armature is slightly smaller than the diameter of the armature space 26, so that the armature 11 is preferably slidably mounted in the axial direction. The armature 11, for example, has an upper cylindrical first region facing the housing upper part 5, and a cylindrical second region is connected to the first region on the valve region side, and the second region is coaxially arranged with the first region and has a smaller diameter. The armature space 11 is preferably defined by a hollow cylinder 16, which is coaxially arranged with the tubular part 4 and arranged in the tubular part. The hollow cylinder 16 preferably has a bottom and is especially constructed to be open in the direction of the cylinder 21. The bottom preferably points in the direction of the housing upper part 5 and, for example, at least partially abuts against the housing upper part. The hollow cylinder 16 is preferably composed of a magnetizable or magnetic material.

[0065] The coil 8 is preferably constructed and arranged so that when an electric current is applied to the coil, a magnetic field with magnetic field lines is formed, which preferably extend substantially in the axial direction in the armature space 26. The armature 11 is preferably composed of a magnetizable or magnetic material and can move in the axial direction according to the polarity of the magnetic field formed by means of the coil 8. In the armature space 26, a pole portion 12 is especially arranged, which is constructed as a hollow cylinder and is arranged coaxially with the tubular portion 4. The armature 11, especially the cylindrical second region of the armature 11, extends centrally through the pole portion 12 in the axial direction. The pole portion 12 is preferably composed of a magnetizable or magnetic material. The pole portion 12 is especially abutted against the inner wall of the hollow cylinder 16 and is, for example, fixedly connected to the hollow cylinder. An annular space is preferably constructed between the pole portion 12 and the armature 11, and in particular a hydraulic fluid can flow through the annular space.

[0066] A flux plate 10 is arranged circumferentially around the hollow cylinder 16 and concentrically with the hollow cylinder. The flux plate 10 is preferably hollow cylindrical and in particular abuts against the outer wall of the hollow cylinder 16. In addition, the flux plate 10 at least partially abuts against the tubular portion 4 and preferably forms a flux connection between the hollow cylinder 16 and the tubular portion 4. The flux plate 10 preferably abuts against the coil 8 and in particular forms a flux connection between the hollow cylinder 16, the tubular portion 4 and / or the coil 8. The flux plate 10 has, for example, at least two recesses that are opposite to each other and extend from the outside to the inside in the radial direction, Figure 2 The section of the view extends through these cutouts.

[0067] A pole tube element 6 is connected to the hollow cylinder 16 in the axial direction and coaxially with the hollow cylinder. The pole tube element 6 and the hollow cylinder 16 together form the pole tube 7, wherein the pole tube 7 is in particular constructed in one piece or in one piece. Preferably, the pole tube element 6 is constructed in one piece with the hollow cylinder 16 or is fixedly connected to the hollow cylinder, for example, connected in a form-locking, force-locking and / or material-locking manner. The hollow cylinder 16 extends at least partially or completely along the coil 8 in the axial direction. Preferably, the pole tube element 6 and the hollow cylinder 16 at least surround the armature 11, the armature space 26 and the pole part 12.

[0068] The pole tube 7 has an upper tubular region, in particular, with a constant inner diameter, which preferably includes a hollow cylinder 16 and extends from the upper part of the housing in the axial direction until it exceeds the armature 11. In the axial direction, the upper tubular region is connected to a lower region with a widened diameter, wherein the outer surface of the pole tube, in particular the pole tube element 6, preferably extends to the tubular part 4 and at least partially abuts against it. The inner surface of the lower region of the pole tube element 6 at least partially surrounds the valve region 9, which will be explained in more detail in one of the following paragraphs. The pole tube 7 preferably has a recess 18, which is, for example, annularly configured in the circumferential direction in the pole tube wall. Preferably, the recess 18 is arranged coaxially with the coil 8 and, in particular, is arranged in the coil 8. The recess 18 has, for example, a quadrilateral cross section.

[0069] Preferably, the pole tube element 6 of the pole tube 7 has a plurality of different inner diameters, which in each case form a cylindrical space of different diameters. Furthermore, the pole tube 7 has, in particular, a plurality of different outer diameters. In the axial direction of the drive region 19, in the direction of the valve region 9, the pole tube 7 preferably has a first outer diameter, which forms a hollow cylinder 16 and preferably extends along the coil 8. The first outer diameter is followed by a second outer diameter, which is larger than the first outer diameter, so that a step, in particular an axial end face, is formed, which points in the direction of the housing upper part 5 and against which the coil 8, for example, at least partially rests. The second outer diameter is preferably smaller than the inner diameter of the tubular part 4 and, in particular, is spaced apart from it in such a manner that a chamber 14 is formed between the pole tube 7 and the tubular part 4. For example, the second outer diameter is followed by a third outer diameter of the pole tube 7, which is larger than the first and second outer diameters and preferably substantially corresponds to the inner diameter of the tubular part 4, so that the pole tube 7 rests on the tubular part 4 with the third outer diameter. A step, in particular an axial end face, is formed between the second and the third outer diameter, which faces in the direction of the housing upper part 5. The pole tube element 6 is preferably made of a magnetizable or magnetic material.

[0070] The chamber 14 is preferably designed to accommodate a sealing element 13, in particular a sealing ring. Preferably, the chamber 14 is annular and in particular has a rectangular cross section. The chamber 14 is in particular completely closed and is bounded by the pole tube 7, the tubular part 4 and, for example, the coil 8. The coil 8 preferably has a projection 15 extending in the axial direction, in particular along the inner wall of the tubular part 4, which extends between the tubular part 4 and the pole tube 7 and is adjacent to the chamber 14. The projection 15 is preferably made of plastic material and is in particular connected to the pole part 7 and the tubular part 4 in a form-fitting manner. The end face of the projection 15 pointing in the direction of the valve preferably forms the limit of the chamber 14.

[0071] A sealing element 13 is arranged in the chamber 14, wherein the sealing element 13 is preferably a sealing ring. The sealing element 13 is designed, for example, in an annular manner and preferably has a round, in particular circular cross section. Preferably, the sealing element 13 rests at least on the pole tube 7 and the tubular section 4 and serves to seal the valve region 9 relative to the drive region 19, so that no hydraulic fluid can enter the coil 8 from the valve region 9. In particular, the sealing element 13 additionally rests on a step, preferably on an axial end face formed between the second outer diameter and the third outer diameter of the pole tube 7.

[0072] Alternatively, the projection 15 can also be designed as a support ring 15. The support ring 15 is, for example, designed independently of the coil 8 and rests at least partially on the coil with its outer surface. The support ring 15 is preferably designed in an annular manner and has, for example, a rectangular cross section. In particular, the support ring rests with its outer surface on the inner side of the tubular part 4 and with its inner surface on the outer surface of the pole tube 7. The end face of the support ring 15 pointing in the direction of the valve is adjacent to the chamber 14. The support ring 15 is preferably fixedly connected to the coil 8, the pole tube 7 and / or the tubular part 4. Preferably, the support ring 15 forms a contact surface for the sealing element 13.

[0073] The pole tube element 6 is preferably connected to the tubular part 4 via a form-locking connection. The form-locking connection preferably includes a radial recess, in particular a depression, in the pole tube element 6, in which a radial contraction of the tubular part 4 is embedded and cooperates with the radial recess, so that the pole tube element 6 is fixed in the axial and radial directions. The form-locking connection is in particular a bayonet connection. For example, the pole tube 7, in particular the pole tube element 6, has a plurality of recesses 33, in particular hook-shaped. Each recess 33 includes, for example, a region extending in particular in the axial direction and a region extending in the circumferential direction connected to the region. At least one or more radial contractions 32 of the tubular part 4 are preferably embedded in the recess 33. The recess 33 is preferably a radial depression constructed in the outer surface of the pole tube 7 that rests on the tubular part 4. Preferably, the recess 33 extends into the chamber 14 and in particular forms an interruption of the contact surface of the sealing element 13. In Figure 2 Only a portion of the region of the recess 33 extending in the circumferential direction is shown in FIG.

[0074] The valve region 9 is preferably integrated into a hydraulic circuit (not shown) and is fluidically connected to the shock absorber 2, in particular to the working space of the shock absorber 2. The valve region 9 has an inlet 28 and an outlet 29, whose function can be reversed depending on the flow direction of the damping fluid.

[0075] The valve region 9 of the damping valve device 1 preferably comprises a control slide 17 which is at least partially or completely surrounded in the circumferential direction by the pole tube element 6 and is arranged in particular coaxially with the pole tube element and the tubular portion 4. The control slide 17 preferably has an axial end face which points in the direction of the armature 11 and against which the armature 11, in particular the lower second region of the armature 11, rests, so that the movement of the armature 11 is transmitted to the control slide 17.

[0076] Furthermore, the valve area 9 comprises a valve block 27. The control slide 17 preferably surrounds the valve block 27 in the circumferential direction and is mounted movably relative to the valve block 27 in the axial direction. The valve block 27 is in particular funnel-shaped and has, for example, a cylindrical upper region facing the drive unit 19, which is arranged coaxially with the control slide 17. At the lower region facing away from the drive unit 19, the valve block 27 has, for example, a radial widening. The valve block 27 is in particular mounted statically relative to the axially movable control slide 17. Preferably, the valve block 27 is at least partially or completely surrounded by the pole tube element 6 in the circumferential direction and in the axial direction, wherein the control slide 17 is 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 directly adjacent to the pole tube element 6 in the radial direction and preferably at least partially rests on the pole tube element. The flow channels 20, which are only partially shown, are formed in the valve block 27, through which the damping fluid can flow from the inlet 28 in the direction of the outlet 29. The control slide 17 is mounted axially movably such that the control slide completely releases the flow channel 20 in the open position of the damping valve device 1 and completely closes the flow channel 20 in the closed position of the damping valve device 1. The control slide 17 can preferably assume a plurality of intermediate positions in which the flow channel 20 is partially closed. The control slide 17 is preferably preloaded in the direction of the open valve position by means of a spring (not shown), so that the damping valve is open when the coil 8 is not energized. The spring is preferably arranged between the control slide 17 and the valve block 27 and exerts a force on the control slide preferably in the axial direction in the direction of the drive region 19. An annular space 30 for guiding the damping fluid is preferably formed between the valve block 27 and the pole tube element 6. The annular space 30 preferably extends completely around the upper region of the valve block 27 that can be surrounded by the control slide 17, and in particular extends at least partially or completely around the lower region of the valve block 27. Preferably, the control slide 17 can move axially in the annular space 30.

[0077] The valve area 9 preferably comprises a comfort valve and a solenoid valve, which are hydraulically connected in series with each other. For example, the valve block 27 comprises two valve bodies. The valve body pointing in the direction of the drive area is, for example, a solenoid valve body, which has the aforementioned flow channel 20 and a plurality of flow ducts 31 and cooperates with the control slide 17 that can be moved by means of the coil 8. In the direction of the cylinder 21 of the shock absorber 2, the comfort valve body is preferably connected to the solenoid valve body. For example, the valve block 27, which is optionally composed of the solenoid valve body and the comfort valve body, is constructed in one piece or in one piece.

[0078] In particular, a fluid outlet 29 is formed between the valve block 27 and the pole tube 7. Preferably, a plurality of flow ducts 31 are formed between the pole tube 7 and the valve block 27. The flow ducts 31 are at least partially formed in the valve block 27. The flow ducts 31 preferably extend along the pole tube 7, wherein the pole tube 7 preferably has no through-openings, in particular bores, for conducting the damping fluid through the pole tube wall.

[0079] The pole tube 7 extends, for example, at least partially in the axial direction along the comfort valve body. The end region of the pole tube 7 is preferably mechanically shaped in order to form a connection between the pole tube 7 and the valve block 27. The pole tube 7 and the valve block 27 are connected to each other in particular by means of a mechanical joint connection. The joint connection is, for example, a crimp or a crimp. Preferably, the end region of the pole tube 7 pointing in the direction of the comfort valve is radially inwardly shaped, so that in particular a radially inwardly shaped edge of the pole tube 7 is formed.

[0080] Figure 3 A detailed view of the annular space 30 is shown, wherein the components shown correspond substantially to Figure 2 parts.

[0081] The valve block 27, in particular the solenoid valve body, has a cylindrical first region 40 in which the flow channel 20 is formed. A substantially cylindrical second region 41 is connected to the first region 40, preferably in the direction of the fluid outlet 29, and has a larger diameter than the first region 40. The second region is Figure 3 A flow duct 31 is constructed in the second region. Figure 2 As shown, the flow duct 31 is preferably constructed open in the direction of the pole tube 7, so that the flow duct 31 is respectively constructed between the inner surface of the pole tube 7 and the valve block 27, especially the surface of the second area 41 that points radially outward. The second area 41 has, for example, a circumferential surface that points radially outward and a shoulder surface that points axially in the direction of the first area 40. The shoulder surface preferably rests on the pole tube 7. The flow duct 31 preferably extends from the shoulder surface to the circumferential surface, and is especially formed as a recess, preferably a protrusion, in the shoulder surface and the circumferential surface. For example, the extension direction of the flow duct 31 has an axial and radial component. For example, the flow duct 31 extends continuously at an angle of 10° to 80°, especially 20° to 60°, preferably 30° to 50° relative to the axial direction. The flow duct 31 is, for example, constructed in the valve block 27 in a half-shell shape, and extends away from the first area 40, especially from the flow channel 20, in a star shape. For example, the flow ducts 31 extend outwards from a completely circular region radially inward of the shoulder surface to the circumference. The flow ducts 31 have, for example, a circular, semicircular, circular, elliptical, rectangular or square cross section. Preferably, all or a plurality of flow ducts 31 are geometrically identically constructed and are evenly spaced from one another, in particular in the circumferential direction.

[0082] The first region 40 of the valve block 27 has a flow channel 20 and is preferably arranged coaxially with the control slide 17. The first region 40 can preferably be completely or partially surrounded by the control slide 17. The flow channel 20 is preferably a circular hole in the valve block 27, in particular in the wall of the first region 40 of the valve block 27. For example, the flow channels 20 are arranged evenly spaced apart from each other. Preferably, the valve block 27 has six flow channels 20, which are arranged circumferentially around the first region 40 of the valve block 27, and in particular mutually adjacent flow channels 20 are arranged offset by 60° from each other. The number of the flow channels 20 is preferably an even number, in particular four, six, eight or ten.

[0083] The annular space 30 is preferably defined by at least the control slide 17, the pole tube 7 and the valve block 27. The annular space 30 has an inner diameter and an outer diameter. For example, the annular space 30 has at least two different outer diameters. The first outer diameter Da1 preferably extends over a length L1 in the axial direction and is preferably constructed partially or completely around the control slide 17. The outer diameter of the annular space 30 corresponds in particular to the inner diameter of the pole tube 7.

[0084] Preferably, the annular space 30 comprises a first annular space region 42 having a constant first outer diameter Da1 and a second annular space region 44 preferably connected to the first annular space region 42 in the direction of the fluid outlet 29. Preferably, the first annular space region 42 having the first outer diameter Da1 extends at least partially around the flow channel 20 configured in the valve block 27. The second annular space region 44 is directly connected to the first annular space region 42 and preferably extends to the second region 41 of the valve block 27, in which a flow duct is configured. Preferably, the second annular space region 44 is at least partially defined by the flow duct 31. The second annular space region 44 preferably extends at least partially around the flow channel 20 configured in the first region 40 of the valve block 27.

[0085] The second annular space area 44 preferably has an outer diameter that varies, in particular is non-constant, over the axial length L2. In particular, the second annular space 44 has a maximum outer diameter Da2 that is greater than the outer diameter Da1 of the first annular space area. The maximum outer diameter Da2 of the second annular space area 44 preferably corresponds to the outer diameter of the flow duct 31. In particular, the second annular space 44 has a minimum outer diameter that is greater than or equal to the outer diameter Da1 of the first annular space area 42. The minimum outer diameter of the second annular space area 44 preferably corresponds to the inner diameter of the flow duct 31. Preferably, the change in the outer diameter of the second annular space segment 44 between the minimum outer diameter and the maximum outer diameter Da2 corresponds to the pitch circle segment.

[0086] The first annular space section 42 preferably has an inner diameter Di1, which corresponds, for example, to the outer diameter of the control slide 17 or the outer diameter of the valve block 27, in particular to the outer diameter of the first region 40 of the valve block 27. In the first annular space section 42, the ratio of the outer diameter Da1 to the inner diameter Di1 is preferably Da1 / Di1 = 0.7 to 0.95, in particular 0.8 to 0.9. The second annular space section 44 preferably has an inner diameter Di2, which corresponds, for example, to the outer diameter of the valve block 27, in particular the second region 41 of the valve block 27. In the second annular space section 44, the ratio of the outer diameter Da2 to the inner diameter Di2 is preferably Da2 / Di2 = 0.7 to 0.95, in particular 0.8 to 0.9.

[0087] The second annular space segment 44 preferably extends over a length L2 in the axial direction. For example, the second annular space segment 44 extends from the first annular segment 42 having a constant outer diameter Da1 to the second region 41 of the valve block 27. In particular, the second annular space segment 44 only includes a region having an outer diameter Da2x that changes continuously in the axial direction. For example, another annular space segment is connected to the second annular space segment 44 in the direction of the fluid outlet 29, and the other annular space segment preferably has a constant outer diameter. Preferably, the ratio of half the diameter difference to the length L2 corresponds to about 0.4 to 0.7, in particular 0.5 to 0.6.

[0088] 0.4 to 0.7, especially 0.5 to 0.6

[0089] The damping valve device 1 is used to set the damping of the shock absorber 2, in particular steplessly. During operation of the shock absorber 2, an electric current is applied to the coil 8 in order to set the desired damping. This generates a magnetic field, the magnetic field lines of which run essentially in the axial direction inside the coil and in particular in the armature space 26. The magnetic flux of the magnetic field runs in a magnetic circuit constructed in the damping valve device 1. The magnetic circuit includes components made of a low magnetic resistance material, preferably a magnetic or magnetizable material. The magnetic circuit for conducting the magnetic field, in particular the magnetic flux, is preferably formed by a flux plate 10, a hollow cylinder 16, a pole tube element 6, an armature 11, a tubular part 4 and / or a pole part 12. The armature 11 moves in the axial direction according to the polarity of the magnetic field. The movement of the armature 11 is transmitted to a control slide 17 coupled to the armature 11, so that the control slide closes or at least partially releases the flow channel 20 of the valve block 27. In Figure 2 The open position of the damping valve arrangement 1 is shown by way of example in FIG.

[0090] Reference numerals list

[0091] 1 Damping valve device

[0092] 2 Shock absorber

[0093] 3 Damping valve housing

[0094] 4 Tubular section

[0095] 5 Upper shell

[0096] Hexagonal tube element

[0097] 7-pole tube

[0098] 8 coils

[0099] 9 valve area

[0100] 10 Flux Plate

[0101] 11 Armature

[0102] 12-pole section

[0103] 13 Sealing element

[0104] 14 Chambers

[0105] 15 Protrusion / Support Ring

[0106] 16 Hollow Cylinder

[0107] 17 Control Sliders

[0108] 18 recesses

[0109] 19 drive units

[0110] 20 flow channels

[0111] 21 cylinder barrel

[0112] 22 Cover Section

[0113] 23 Hollow cylinder section / accommodation

[0114] 24Positive locking connection

[0115] 25 connection areas

[0116] 26 armature space

[0117] 27 valve block

[0118] 28 Flow inlet / fluid inlet

[0119] 29 Flow outlet / fluid outlet

[0120] 30 Ring Space

[0121] 31 Flow Pipe

[0122] 32 Contraction

[0123] The blank space in the 33 pole tube

[0124] 34 Solenoid valve body

[0125] 35 Comfort Valve Body

[0126] 36 Molded Edges

[0127] 37 Preload element

[0128] 38 against the shoulder

[0129] 40 First Area

[0130] 41 Second Area

[0131] 42 First Ring Space Area

[0132] 44 Second Ring Space Area

[0133] Da1 The outer diameter of the first annular space area

[0134] Inner diameter of the Di1 first annular space area

[0135] Da2 The maximum outer diameter of the second annular space area

[0136] Da2x The changing outer diameter of the second annular space

[0137] Inner diameter of the Di2 second annulus area

Claims

1. A damping valve device (1) for a hydraulic shock absorber (2) of a vehicle, comprising: Drive area (19) and valve area (9), a damping valve housing (3) having a tubular section (4) which surrounds the drive region (19) and the valve region (9), The drive region (19) has a coil (8) which is configured such that it generates a magnetic circuit in the damping valve device (1) and cooperates with an armature (11) which is axially movably mounted in the coil (8) to move the armature (11) in the axial direction. The armature (11) is arranged in the pole tube (7) and the pole tube (7) forms a guide for the armature (11). The valve region (9) has a fluid inlet (28) and a fluid outlet (29) for the hydraulic fluid to enter and leave the valve region (9), and the valve region has a valve block (27) having a plurality of flow channels (20) for conducting the hydraulic fluid. The valve area (9) has a control slide (17) which is movably mounted relative to the valve block (27) so that the control slide can be moved between a closed position, in which the flow channel (20) is closed by the control slide (17), and an open position, in which the flow channel (20) is open. It is characterized in that An annular space (30) filled with a hydraulic fluid is defined by the control slide (17), the pole pipe (7) and the valve block, and the annular space (30) has at least two different outer diameters, the annular space (30) has a first annular space area (42) and a second annular space area (44), and the first annular space area (42) is defined by the control slide (17), and the second annular space area (44) includes a flow duct (31) constructed between the valve block (27) and the pole pipe (7).

2. The damping valve device (1) according to claim 1, wherein: The first annular space region (42) has a first outer diameter (Da1), and the second annular space region (44) has a second outer diameter (Da2), and the second outer diameter (Da2) is greater than the first outer diameter (Da1).

3. The damping valve arrangement (1) according to any one of the preceding claims, wherein: The first outer diameter (Da1) is constant over the first annular space region (42), while the second outer diameter (Da2x) varies over the second annular space region (44).

4. The damping valve arrangement (1) according to any one of the preceding claims, wherein: The second annular space region (44) has a maximum outer diameter (Da2) which corresponds to the outer diameter of the flow duct (31).

5. Damping valve arrangement (1) according to any one of the preceding claims, wherein: The second annular space region (44) has a minimum outer diameter corresponding to the first outer diameter (Da1) of the first annular space region (42).

6. Damping valve arrangement (1) according to any one of the preceding claims, wherein: The change in the outer diameter of the second annular space segment (44) between the minimum outer diameter and the maximum outer diameter (Da2) corresponds to a mathematical function, preferably to a pitch circle segment.

7. Damping valve arrangement (1) according to any one of the preceding claims, wherein: The first annular space region (42) has an inner diameter (Di1), and the ratio of the outer diameter (Da1) to the inner diameter (Di1) is 0.7 to 0.95, in particular 0.8 to 0.

9.

8. Damping valve arrangement (1) according to any one of the preceding claims, wherein: The second annular space region (44) has an inner diameter (Di2), and the ratio of the outer diameter (Da2x) to the inner diameter (Di2) is 0.7 to 0.95, in particular 0.8 to 0.

9.

9. Damping valve arrangement (1) according to any one of the preceding claims, wherein: The ratio of the inner diameter (Di2) to the maximum outer diameter (Da2) of the second annular space region (44) corresponds to less than or equal to 0.

51.

10. The damping valve arrangement (1) according to any one of the preceding claims, wherein: The ratio of the inner diameter of the flow duct (31) to the outer diameter of the flow duct (31) is 0.6 to 1.1, preferably 0.7 to 1.

02.

11. Damping valve arrangement (1) according to any one of the preceding claims, wherein: A plurality of flow ducts (31) are formed between the pole tube (7) and the valve block (27), and extend at least partially in radial and axial directions.

12. Damping valve arrangement (1) according to any one of the preceding claims, wherein: The pole tube (7) extends beyond the valve block (27) in the axial direction.

13. Damping valve arrangement (1) according to any one of the preceding claims, wherein: The damping valve housing (3) has a housing upper part (5) which is mounted on the end side of one end of the tubular portion (4), and the pole tube (7) extends from the housing upper part (5) to the valve block (27).

14. A shock absorber (2) for a vehicle, having a damping valve arrangement (1) according to any one of the preceding claims, wherein: The shock absorber has an outer cylinder (21), and the tubular part (4) of the damping valve device (1) is connected to the cylinder (21).

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