DE102005049654B4 - Stackable valve-cylinder unit with integrally manufactured pressure medium distributor and valve-cylinder-unit arrangement - Google Patents

Abstract

Valve-cylinder-unit arrangement (1), comprising at least two valve-cylinder units (2) with at least one valve (4), which on a pressure medium distributor (5) with at least one pressure medium channel (7) for supplying pressure medium is arranged and with the at least one pressure medium channel (7) is in fluidic communication as well as at least one as well formed on the pressure medium distributor (5) via the pressure medium channel (7) and / or the valve (4) fluidly coupled cylinder (6) for receiving a piston, wherein the pressure medium distributor (5) in one piece Injection molding is formed, characterized in that the front side of the pressure medium distributor (5) impressions for the sealed admission at least one further pressure medium distributor (5) proceed, wherein furthermore at least one rail-shaped carrier unit (3) for receiving a plurality of valve-cylinder units (2) provided which is the fluidically connected in series valve-cylinder units (2) at least partially included.

Description

The The invention relates to a valve-cylinder unit change according to the preamble of claim 1

Generally are known valve-cylinder units with valves, a pressure medium distributor with pressure medium channels, which are in fluid communication with the valves and with formed in the pressure medium distributor cylinders. The pressure medium distributor is in one piece from an aluminum profile, preferably formed an extruded profile, in which subsequently with a high Zerspanungsaufwand pressure medium channels and the like be introduced.

adversely on the previously known solution is the very high machining costs for the pressure medium channels as well for fastening thread, Mounting grooves, connecting bores, piston bores, surface treatment the piston bores and the like. These must also be introduced subsequently are such as a deburring of the hole breakthroughs before everything in the connection or interface area between two channels are subsequently performed got to. This requires a high subsequent manual or mechanical Processing costs.

Farther the formation of a pressure medium distributor is known as a profile bar, which not infrequently a length of about 1.30 m. Again, the pressure medium distributor one piece made of an aluminum profile. The corresponding pressure medium channels as well the fastening threads, fastening grooves, etc. are corresponding formed a predetermined pattern.

Especially disadvantageous in this solution is in particular the handling of the very large pressure medium distributor as well the immense machining effort. In addition, in compliance with a Anreihmaßes in relation on the valves, for example, a Anreihmaß of 15 mm, only a small Effective diameter of the hole for the pneumatic cylinder due to the given space feasible because the valves as possible should be arranged closely spaced.

From the DE 296 14 205 U1 goes out a valve-cylinder unit whose intermediate pressure medium distributor is formed as a strand molding and is part of the cylinder. A multiple arrangement of such valve-cylinder units would arise from the fact that they are mounted side by side and are piped with individual pressure medium connections, which causes a correspondingly high installation costs.

The US 4,524,807 discloses a technical solution for the space-saving juxtaposition of pressure medium distributors on each end-side receiving means. However, it is not clear from this prior art whether and how cylinders with this arrangement of the pressure medium distributors could form a structural unit.

From the DE 44 39 667 C2 goes out a valve-cylinder unit, which consists of a pressure cylinder, are fully integrated in the cartridge valves. Would such valve-cylinder units are lined up, they would also have to be mounted side by side and the pressure medium connection with each other via a conventional piping, which causes a correspondingly high installation costs.

Not Finally, the known solutions are through a variety of variants characterized by different assembly For example, a profile bar for different applications result.

task Therefore, the present invention is a valve-cylinder unit as well as to provide a valve-cylinder-unit arrangement those listed above Disadvantages are avoided. In particular, it is an object, a valve-cylinder unit to create, which without high Zerspanungsaufwand with few steps can be made. Also it is a task, one simply stringable built-valve-cylinder unit to create a modular arrangement. Also a task It is a modular valve-cylinder-unit arrangement from several individual valve-cylinder units so that the arrangement is easier to handle.

These Tasks are with the features of claim 1 and claim 7 solved. Advantageous developments of the invention are specified in the dependent claims.

The Invention includes the technical teaching that the pressure medium distributor as one piece of injection molding shaped pressure medium distributor is formed, which end faces having at least one receiving device to the front side Stringing together at least one further pressure medium distributor is provided to a modular, fluidly connected arrangement to allow multiple pressure medium distributor in series.

Of the Term valve is synonymous synonymous used for finished valve units.

The valve-cylinder unit comprises at least at least one valve. The valve may preferably be designed as a pilot or pilot valve. It is preferred that the valve-cylinder unit comprises a plurality, preferably four valves. Accordingly, sufficient pressure medium channels for fluidic connection or coupling of the valves to the pressure medium distributor are provided. The valves are preferably arranged on an upper surface of the pressure medium distributor. Preferably, this upper surface is flat or formed as a plane, so that the valves, which may have a corresponding planar bearing surface, can be stably arranged on the surface.

Central is provided in the valve-cylinder unit, a pressure medium distributor, to which the valve or valves are fluidically coupled. there run through the pressure medium distributor pressure medium channels. Next an upper surface the pressure medium distributor further has a lower surface, which is arranged opposite to the upper surface. This lower one surface is preferably also flat. At the bottom surface is the cylinder arranged for the inclusion of a piston. It can also be arranged a plurality of cylinders. The surface normals of the upper and lower surface point in a transverse direction of the pressure medium distributor.

Further the pressure medium distributor has two end faces. Their surface normals pointing in a longitudinal direction of the pressure medium distributor. Preferably, the end faces are flat educated. Longitudinal the pressure medium distributor is formed at least one pressure medium channel. Preferably, the pressure medium distributor in the longitudinal direction of a plurality of pressure medium channels. These pressure medium channels are for example the supply of the valves and / or recorded in the cylinder Piston, for the vent and the like are formed. Thus, the pressure medium channels under be designed as another work etc.

For a fluidic Coupling of the valves and or the cylinder / piston go from the longitudinal extending pressure medium channels additional pressure medium channels to the valves or cylinders, these preferably in the transverse direction run the pressure medium distributor.

at a subsequent one Introduction of the pressure medium channels For example, by machining such as drilling, etc. arise especially at the transitions between in the longitudinal direction extending pressure medium channels and the transversely extending channels burrs.

Preferably is therefore the pressure medium distributor in one piece by means of a primary molding process, preferably formed by injection molding. This training allows that the pressure medium distributor produced essentially without post-processing is.

When Material for The pressure medium distributor is preferably plastic used; but it can also be any other material, such as metal, in different forms, such as As granules are used, which for prototyping or casting suitable is. The primary molding process is designed so that the pressure medium distributor is made essentially free of post-processing. That is, all in the pressure medium distributor provided recesses are through corresponding means such as deposits and / or slide already in the tool intended for production. This eliminates subsequent processing, especially those in the conventional Production process incurred subsequent, preferably by machine executed Post-processing steps in which the pressure medium distributor off an aluminum profile, preferably manufactured by the continuous casting process was and the corresponding pressure medium channels or other recesses later were introduced by means of cutting process. In particular, the attachment eliminates of threads, grooves, holes, as well as the deburring at hole breakthroughs.

at Mass production, in which the pressure medium distributor in a Tool is made several times, it can be used in the separation of possibly attached to each other various pressure medium distributor for separation effort and afterwards Deburring at the predetermined breaking points come. However, no holes and the like later brought in.

• – Bereitstellung eines Werkzeugs zur Fertigung eines im Wesentlichen nachbearbeitungsfreien Druckmittelverteilers,
• – Bereitstellen eines Materials zur Fertigung des Druckmittelverteilers und
• – Spritzgießen des Druckmittelverteilers.

The pressure medium distributor can be produced in just a few steps:

• Provision of a tool for producing a substantially post-processing-free pressure medium distributor,
• - Providing a material for the production of the pressure medium distributor and
• - Injection molding of the pressure medium distributor.

On This way, a pressure medium distributor in a simple way with be made in a few steps, with almost any subsequent Zerspanungsaufwand eliminated.

For the production a tool is preferably provided, wherein the tool corresponding Includes agents such as inserts, molds and / or slides. These funds like insoles, molds and / or pushers are all suitable Pressure fluid channels and / or connecting bores of the pressure medium distributor at a Injection molding too create.

According to the invention the pressure medium distributor of the valve-cylinder unit pressure medium channels, wherein Including any recesses for receiving valves or valve units and / or cylinders and pressure medium connections to understand are. These recesses can be any kind, the recesses are preferably selected from the group comprising bores, apertures, channels, grooves and the like. The holes can as through-holes and / or blind hole-like holes accomplished be and have fasteners such as threads. The pressure medium channels and / or Recesses, which in particular along the longitudinal axis of the pressure medium distributor are trained, can assume different formations. In particular, the cross section the pressure medium channels be formed differently. Furthermore, the cross section the pressure medium channels over the Length of longitudinal axis vary. The pressure medium channels can thereby parallel to each other and / or across each other and themselves even overlap, so that connections or breakthroughs arise. Furthermore are the pressure medium channels suitable, valves, cylinders, pistons and / or connections or fittings at least partially. This can be a traction, a Material connection or a positive connection may be provided. Usually the pressure medium channels for this purpose as connecting holes, as holes with mounting thread, as Piston holes and the like formed.

The Pressure fluid channels are suitable for conducting pressure medium, wherein the pressure medium any medium which is suitable as a pressure medium include can, in particular pneumatic and / or hydraulic pressure medium such as gases and / or incompressible media such as hydr. Oil. Preferably is used as a pressure medium air.

Generally can the pressure medium channels run arbitrarily through the pressure medium distributor. Preferably the pressure medium distributor is substantially cube-shaped or cuboid-shaped, d. H. with corresponding orthogonal sides, in particular in the longitudinal direction of the pressure medium distributor and / or on the upper or lower surface. The pressure medium channels can basically one any longitudinal cross-section exhibit.

to Stringing together several valve-cylinder units is preferred at least one receiving device on the front side of the pressure medium distributor intended. Accordingly, a corresponding receiving device at the for the juxtaposition further valve-cylinder unit provided. Preferably, a valve-cylinder unit has at each of its end faces at least one receiving device. Thus, for example, a realize endless stringing together of several valve-cylinder units. For better coupling of several valve-cylinder units leave attach several receiving devices on each front page.

Around seal the connected pressure medium distributors with each other, the pressure medium distributors have projections on the front sides, on which radial seals are mounted, which the pressure medium distributor seal with each other.

Prefers is in particular that the receiving device or the recording devices as Anformung (s) and / or recess (s) is / are formed, wherein in each case the Anformung for sealed recording in a corresponding recess a further pressure medium distributor is formed. It can the pressure medium distributor on the one end face a Anformung and on the opposite Have a front end a recess. This can be several Simply arrange valve-cylinder units made according to this scheme. Possible is also that a valve-cylinder unit on both end faces one Anformung has and another valve-cylinder unit at both End faces has a recess. It is also possible that a valve-cylinder unit at their End faces several formations, several recesses or both Formations and recesses has. Accordingly, the corresponding end face of another valve-cylinder unit have corresponding receiving devices.

Prefers is that the pressure medium distributor has a plurality of pressure medium channels, which in the longitudinal direction between the front sides and / or outgoing in the direction of the Valve and / or the cylinder run. That way you can in a juxtaposition of several valve-cylinder units realize continuous pressure medium channel or more continuous pressure medium channels. In this case, the pressure medium channel at least partially by the Receiving devices run.

Further it is preferred that at least one of the longitudinally extending pressure medium channels a from a circular cross-section deviating cross-section, preferably has an oval or slot-like cross-section.

In particular, it is advantageous that the cross section deviating from a circular cross section is designed so that it has a larger dimension in one direction, preferably in the direction of the cylinder axis, than in another direction, preferably transverse to it. In an oval or slot-like shape then has the imaginary longer axis of the cross section preferably in Rich tion of the cylinder axis.

Especially it is advantageous that the deviating from a circular cross-section Cross section with one along an axis in relation to another axis unequal dimension is formed so that pointing towards the larger dimension longer Axis of the section of a circular cross section repellent in Direction of the cylinder axis runs.

moreover It is preferred that the cylinder has a piston bore for movement Receiving a pressure medium controllable piston rod, wherein the piston bore in the longitudinal direction has an oval cross-section.

to fluidic coupling of a piston to be mounted in the cylinder must the appropriate channel leading to the piston or the corresponding Recess be formed so that the piston rod of the piston is at least partially receivable and this is movable arrange within the recess. This is the cross section the recess or the channel adapted to the cross section of the piston. Care must be taken in particular that the piston is sealing, preferably over peripherally arranged on the piston sealing means within the pressure medium channel trouble-free can move. The for the piston provided recess or better the piston bore is relatively large in relation to the cross sections of the other channels.

Want you can now save space in at least one direction, for example To produce a narrow-fitting valve-cylinder unit, so at channels with circular cross sections of the circle diameter correspondingly smaller to get voted. The circle diameter of the channels, which is also called the effective diameter, however, can not accept any performance losses, a predetermined effective diameter and associated therewith a predetermined Effective cross-sectional area do not fall short. The same applies, for example, for pistons.

Preferably is therefore that at least one of the channels or recesses, in particular the Piston bore in piston movement direction, d. H. in the direction of Movement of the piston rod, one deviating from a circular cross section Cross section has. Accordingly, of course, the piston also has one adapted from a circular cross section deviating cross section on. The deviating from a circular cross-section is included is formed so that it has a cross-sectional area which corresponds to the cross-sectional area of at least one to be provided cross-sectional area corresponds to a circular cross-section. By preferably slot-like or oval training, however, can be in the direction of the shorter axis the oval or the slot, that is in the width direction, space save without sacrificing performance.

The Piston hole runs preferably in the transverse direction of the pressure medium distributor. Will you In a confined space avoid that running in the longitudinal direction of pressure medium channels not cutting the piston bore, so can be in the longitudinal direction extending pressure medium channels with a corresponding deviating from a circular cross-section Cross-section such as an oval or slot-like cross-section form.

there are the cross sections of the piston bore and the longitudinal direction extending pressure medium channels matched to each other according to the available space.

Further It is advantageous that the pressure medium distributor with a sufficient Number of pressure medium channels and / or connecting bores is formed, preferably at least two, more preferably at least three, and most preferably at least four corresponding valves for fluidic communication to pick up or pair.

Thereby, that the pressure medium distributor in much smaller units can be made, can form small modular units. For example, profile beams, which lengths up to 1.3 m and more can have completely formed with different cylinders and associated control valves are, lets reduce the variety of parts due to the modular design. It does not have to for Each application made a custom-made profile beam become. Instead, individual modules can be exchanged.

Preferably has the pressure medium distributor pressure medium channels and / or connections for four valves on. Accordingly, the pressure medium distributor must be a precaution which provides the essential standard pressurization equipment. These Standard pressurizations can be subdivided in terms of the parameters center distance, cylinder, stroke and pressurization. The center distance is usually wheelbases from 13-15 mm, 26-30 mm and 54-60 mm used. With respect to the cylinder stroke are usually 6-8 mm and 13-14 mm cylinder stroke provided.

The pressurization is preferably carried out in an impression version or in a two-printing version. Thus, depending on the requirements, either all seats can be equipped with cylinder components or valves. Will with larger center distance For example, only every second (valve) space on the pressure medium distributor required, for example, at the empty spaces of the supply line (P-line) formed pressure medium channel correspondingly closed with a ball or the like and the unnecessary components can be omitted. With different cylinder stroke requirements, a distance aid is used for shorter strokes, the short stroke variant.

The Invention includes continue the technical teaching that a valve-cylinder-unit arrangement at least comprises two valve-cylinder units, wherein at least one rail-shaped support unit is provided for receiving a plurality of valve-cylinder units, which in series over their receiving devices fluidly connected valve-cylinder units at least partially, so a modular arrangement to form several valve-cylinder units.

The Valve-cylinder units are designed so that they can be aligned flush are and insert themselves accordingly into a rail-like profile to let. Preferably, not to the valve-cylinder unit contacting or not adjacent to another valve-cylinder unit arranged end faces each arranged a lid or bottom element, around the pressure medium channel or the pressure medium channels through the valve-cylinder unit (s) to limit. By the juxtaposition of several valve-cylinder units in a carrier unit let yourself so easily a modular profile bar with any variable length and equipment realize. The individual valve-cylinder units can before insert into the carrier unit pre-assembled and equipped. Not needed Pressure medium channel openings and like that be closed in a simple manner.

Prefers is that the carrier unit and / or at least one valve-cylinder unit fastening devices to the juxtaposed valve-cylinder units with the carrier unit to attach and so to realize a secure connection.

At the ends of the pressure medium distributors, where the juxtaposition ends, each metallic end pieces are attached to the profile so that the valve-cylinder units are safely positioned. The valve-cylinder units can be connected with each other as desired. Preferably, a frictional connection intended.

Also preferred is that the fastening devices as groove-shaped recesses in the carrier unit and / or the pressure medium distributor of the corresponding valve-cylinder unit are formed, in which then at least one positive-locking element such as a sliding block, Round wire and the like is arranged. Preferably, sliding blocks used for fixing the valve-cylinder units. These will preferably braced at the ends of the valve blocks in the carrier unit.

Prefers is further that the carrier unit as U-shaped Profile is designed to accommodate the valve-cylinder units so that these together with arranged piston rods in series in the carrier unit can be moved laterally one after the other. This valve can and cylinders both as a complete unit in or on the carrier unit be attached or as individual parts in the carrier profile be introduced.

Around couple multiple valve-cylinder units, it is preferable that the pressure medium distributor on at least one side for receiving one corresponding to a region of the pressure medium distributor support unit comprising profiles and rails is formed. This is when juxtaposing several valve-cylinder units or pressure medium distributor sufficient stability over one size overall length achieved because the pressure medium distributor in a corresponding profile, For example, a U-profile can be pushed. For better Locking and positioning are holding webs or retaining grooves in the corresponding profile and / or the pressure medium distributors, preferably provided plastic pressure medium distributors. Preferably the profile is an aluminum profile, more preferably designed U-shaped.

By doing Profile is appropriate space for the routing of the electrical line provided for controlling the valves.

Further Advantages, features and details of the invention as well as improving activities are in the subclaims or together with the description below a preferred embodiment of the invention with reference to the figures shown in more detail. It shows:

1 a side view of a valve-cylinder-unit arrangement according to the invention and

2a - 2g several views of a valve-cylinder unit according to the invention with four valves.

1 shows a side view of a valve-cylinder-unit arrangement according to the invention 1 , The valve-cylinder-unit arrangement 1 comprises a valve-cylinder unit 2 , which in a U-shaped as a carrier unit 3 to Stabilization is arranged. The valve-cylinder unit 2 further includes valves 4 and a pressure medium distributor according to the invention 5 , In the pressure medium distributor 5 is still a cylinder 6 designed to receive a piston with a piston rod. Next are in the pressure medium distributor pressure medium channels 7 educated. The pressure medium channels 7 are shown here visibly in the longitudinal direction and have different geometric shapes. In this case, the vast majority of the pressure medium channels 7 a circular or circular cross section in the longitudinal direction of the valve-cylinder-unit arrangement 1 on. A first pressure medium channel 7a has in the longitudinal direction a deviating from a circular shape, oval or slot-like cross-section, whereby at the same cross-sectional area compared to a corresponding piston bore with circular cross-sectional space in the horizontal transverse direction of the valve-cylinder units arrangement 1 is saved. Accordingly, the dimensions in the vertical direction of the valve-cylinder-unit arrangement are made larger. Thus, a smaller bay or Achsmaß realize. The pressure medium channels 7 Circular cross sections are primarily used for pressure medium line or for pressure medium connection. The front or front side shown here is configured to include further valve-cylinder units 2 sealingly can be connected here. On the top of the pressure medium distributor 5 , which is essentially plan or executed as a plane, are several, here two visible, valves 4 arranged, which via not shown here pressure fluid channels and / or connecting bores with the pressure medium distributor 5 or the pressure medium channels extending therein are coupled. The valve-cylinder unit is surrounded 2 at least partially by a profile rail made of aluminum, as a carrier unit 3 acts and which here roughly has the shape of a U-shaped profile, ie in the direction of the underside of the pressure medium distributor 5 is open. Between valve-cylinder unit 2 and the carrier unit 3 or U-profile, installation space is provided for corresponding connecting lines. Further details of the valve-cylinder unit 2 are in 2 to see. For fastening the valve-cylinder units 2 on the carrier unit 3 and the carrier unit 3 with possibly further carrier units are corresponding fastening devices 8th to see, with the first fastening devices 8a for mounting valve-cylinder unit 2 and carrier unit 3 are designed as a round groove, in which a round wire is arranged for attachment. The second fastening devices for the carrier units 3 are formed as T-shaped grooves.

2 shows in more detail by means of seven different views a valve-cylinder unit 2 , 2a shows the valve-cylinder unit 2 in the opposite to 1 illustrated side view. From 1 is different 2 essentially in that the carrier unit 3 or the U-profile for stabilization is not shown. Again, the valve-cylinder unit includes 2 several valves 4 as well as the pressure medium distributor 5 , In 2 B is the view 2a folded by 90 ° to the right in the plane.

2 B shows in the side view better the arrangement of the here four valves and pistons on the underside of the pressure medium distributor. Clearly visible in 2 B on the left side, which corresponds to the front, the recording devices formed as projections 9 , which serve to connect a plurality of valve-cylinder units or pressure medium distributor.

2c show the 2 B turned 90 ° upwards. As a result, the underside of the valve-cylinder unit with four oval or slot-like piston bores 7b visible, noticeable.

2d shows the other hand 2 B pivoted 90 ° down so that the top of the valve-cylinder unit is visible with the four arranged on the top valves. The staggered arrangement of the four valves becomes clear 4 to each other, which is also clear that not all pressure fluid channels are covered or covered by the valves or valve units. These pressure medium channels or communication holes, which are not covered by the valve units, are sealed by closures, such as balls.

2e shows the valve-cylinder unit in the view in which they are also in 1 is pictured.

2f shows a side view, which shows the rotation of the 2e to the right by 90 °.

Finally shows 2g a perspective view of the valve-cylinder unit 2 ,

1

Valve-cylinder unit arrangement

2

Valve-cylinder unit

3

support unit (U-profile)

4

Valve (moiety)

5

Fluid manifold

6

cylinder

7

Pressure fluid channel

7a

first Pressure medium channel (oval)

7b

second Pressure medium channel (oval piston bore)

8th

fastening device

8a

first fastening device

9

cradle

Claims (9)

Valve-cylinder-unit arrangement ( 1 ) comprising at least two valve-cylinder units ( 2 ) with at least one valve ( 4 ), which on a pressure medium distributor ( 5 ) with at least one pressure medium channel ( 7 ) is arranged to the pressure medium supply and with the at least one pressure medium channel ( 7 ) is in fluidic communication and at least one also at the pressure medium distributor ( 5 ) formed over the pressure medium channel ( 7 ) and / or the valve ( 4 ) fluidically coupled cylinders ( 6 ) for receiving a piston, wherein the pressure medium distributor ( 5 ) is integrally formed from injection molding, characterized in that the end face of the pressure medium distributor ( 5 ) Anformungen for the sealed receiving at least one further pressure medium distributor ( 5 ), wherein furthermore at least one rail-shaped carrier unit ( 3 ) for accommodating a plurality of valve-cylinder units ( 2 ), which connects the fluidically connected in series valve-cylinder units ( 2 ) at least partially. Valve-cylinder-unit arrangement ( 1 ) according to claim 1, characterized in that the carrier unit ( 3 ) and / or at least one valve-cylinder unit ( 2 ) Fastening devices ( 8th . 8a ) to the juxtaposed valve-cylinder units ( 2 ) with the carrier unit ( 3 ) and thus to realize a secure connection. Valve-cylinder-unit arrangement ( 1 ) according to claim 1 or 2, characterized in that the fastening devices ( 8th ) as groove-shaped recesses in the carrier unit ( 3 ) and / or the pressure medium distributor ( 5 ) of the corresponding valve-cylinder unit ( 2 ) are formed, in which then at least one positive locking element such as a sliding block, round wire and the like is arranged. Valve-cylinder-unit arrangement ( 1 ) according to one of claims 1 to 3, characterized in that the carrier unit ( 3 ) is formed as a U-shaped profile to the valve-cylinder units ( 2 ) so that these together with arranged thereon piston rods in series in the carrier unit ( 3 ) can be moved laterally one after the other. Valve-cylinder-unit arrangement ( 1 ) according to claim 1, characterized in that the receiving devices ( 9 ) are formed as Anformung and / or recess, wherein each of the Anformung for sealed recording in a corresponding recess of another pressure medium distributor ( 5 ) is trained. Valve-cylinder-unit arrangement ( 1 ) according to claim 1, characterized in that the pressure medium distributor ( 5 ) several pressure medium channels ( 7 ), which in the longitudinal direction between the end faces and / or outgoing therefrom in the direction of the valve ( 4 ) and / or the cylinder ( 6 ). Valve-cylinder-unit arrangement ( 1 ) according to claim 1, characterized in that the at least one of the longitudinally extending pressure medium channels ( 7 ) has a deviating from a circular cross-section, preferably oval or slot-shaped cross-section. Valve-cylinder-unit arrangement ( 1 ) according to claim 7, characterized in that the deviating from a circular cross section is formed so that an axis in the direction of the larger dimension of the cross section in the direction of the cylinder axis. Valve-cylinder-unit arrangement ( 1 ) according to claim 1, characterized in that the cylinder ( 6 ) a piston bore ( 7b ) for movably receiving a pressure-medium-controllable piston rod, wherein the piston bore ( 7b ) in the longitudinal direction of a deviating from a circular cross-section, preferably oval or slot-shaped cross-section.