EP1952033A1 - Hydraulic cylinder - Google Patents
Hydraulic cylinderInfo
- Publication number
- EP1952033A1 EP1952033A1 EP06806573A EP06806573A EP1952033A1 EP 1952033 A1 EP1952033 A1 EP 1952033A1 EP 06806573 A EP06806573 A EP 06806573A EP 06806573 A EP06806573 A EP 06806573A EP 1952033 A1 EP1952033 A1 EP 1952033A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic cylinder
- cylinder
- bottom region
- container
- mast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1433—End caps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
Definitions
- the present invention relates to a hydraulic cylinder for multi-part mast structure made up of at least two articulated mast arms, one of which can be pivoted by the hydraulic cylinder relative to the other mast arm, in particular for concrete pumps, cranes, lifting platforms and the like, with a cylinder container which is closed on one side in a floor area for receiving a Piston.
- the present invention relates to a device with a mast structure with at least two articulated mast arms, one of which can be pivoted relative to the other mast arm by a hydraulic cylinder, in particular for concrete pumps, cranes, lifting platforms and the like.
- mast structures made up of a plurality of mast arms, each of which is articulated in pairs, are used in the construction industry, for example, to convey flowable building materials, such as concrete, from a central delivery location to virtually any processing locations within the reach of the mast structure.
- two mast arms of the mast structure are connected to one another in an articulated manner and pivotable relative to one another by means of a hydraulic cylinder.
- the hydraulic cylinder machine is a pressure vessel of variable geometry for delivering and absorbing forces.
- the housing of the hydraulic cylinder hereinafter also referred to as the cylinder container, is formed from a (cylinder) tube with a welded-on base piece.
- the base piece regularly consists of a solid cylinder with a transverse bore for a bearing pin, which is provided for fastening the hydraulic cylinder to one of the mast arms.
- the base piece can also be designed in the form of a disk with a welded-on cross tube as a pin bearing.
- the corresponding bolt eye is narrow and equipped with a spherical bearing, or it reaches the width of the container or protrudes laterally beyond this.
- the base section is welded to the cylinder tube as a carefully machined disc.
- the pin bearing is also connected in a complex manner to the base plate. The design of the base piece as a steel casting improves the stability properties of the solution described above.
- the invention is based on the object, while avoiding the disadvantages mentioned above, of creating a hydraulic cylinder which, owing to an improved flow of force, can be produced with a reduced amount of material and thus a reduced overall weight with at least equivalent or improved stability.
- the invention is based on the object of providing a device with a mast structure which, in comparison with known devices of this type, is distinguished in particular by a lower overall weight and improved movement and stability properties.
- the object is achieved in that the bottom region of the cylinder container is curved.
- the object is achieved in that the device has at least one hydraulic cylinder according to the invention for pivoting the mast arms.
- the basic idea of the approach according to the invention is to replace the bottom part of the hydraulic cylinder, which is conventionally formed in the form of a disc, with a curved shell, in particular a hemisphere shape which, from a static point of view, represents the optimal shape and accordingly requires the smallest wall thickness with maximum weight reduction.
- a preferred development of the hydraulic cylinder according to the invention provides that the bottom area is concave with respect to the cylinder container, i.e. curved outwards, is formed, which results in a particularly favorable flow of force.
- the bottom area is convex, i.e. arched inwards, is formed.
- the bottom area has a uniform curvature on average, the bottom area of a particularly preferred development of the hydraulic cylinder according to the invention being designed as a spherical section, in particular as a hemispherical shell .
- hydraulic cylinder in the base region of the cylinder container with a curvature which is uneven in section.
- a further embodiment of the hydraulic cylinder according to the invention provides that the bottom region of the cylinder container is designed as a paraboloid.
- the bottom area is symmetrical in section with respect to a longitudinal axis of the cylinder container.
- hydraulic cylinder according to the invention is to be used for use with a mast arm structure known per se, it will be necessary to place a bearing eye in the form of an eye part in the bottom region of the cylinder container, i.e. to provide a component with at least one such bearing eye.
- a particularly preferred embodiment of the hydraulic cylinder according to the invention provides that the base area on its inside as a spherical section, in particular as a hemisphere, and on it Outside is designed as a paraboloid, which results in the desired increase in wall thickness, especially in the apex area of the curvature, so that preferably a bearing eye (eye part) can be arranged there.
- the cylinder tube can be extended beyond the curved floor area in order to divert reaction or bearing forces, the bearing eyes for the bearing pin for fastening the hydraulic cylinder to one of the mast arms being able to be used in the additional space thus gained.
- the eye part is designed as an annular part which extends the cylinder container beyond its base region and has two eye openings arranged opposite one another in its jacket for receiving at least one fastening bolt.
- the above-described extension of the cylinder container beyond the base region expediently results from the attachment of an additional ring part, whereas if the base region is convexly curved, this or the corresponding base piece itself can be extended downward beyond the cylinder container, so that no further ring part is to be provided.
- a fastening bolt guided outside the pressure range of the hydraulic cylinder requires a relatively large dead length of the cylinder in its bottom region.
- the bolt eye can also be moved into the pressure area of the hydraulic cylinder and penetrate it.
- the eye part is designed as a bolt bearing tube which penetrates the cylinder container.
- the pin bearing tube is arranged within a volume defined by the floor area.
- the bolt bearing tube covers the bottom region of the cylinder container, i.e. touches a wall of the cylinder container.
- the cylinder container can be formed in one piece in its base region as a cast part with improved stability properties.
- the pin bearing tube is also possible to arrange the pin bearing tube at a distance from the bottom region of the cylinder container.
- Such a construction has the advantage that the bolt bearing tube can still be produced on both sides after the cylinder container has been manufactured Opening the latter as a welded construction can be used subsequently in this.
- the bottom area and the bolt bearing tube can be formed together in one piece, in particular as a cast part.
- This cast part is connected to a cylinder tube to form a cylinder container by means of an annular weld seam.
- the seam preparation required for this also includes the training of the necessary bath protection for the weld seam. Due to the favorable flow of force according to the invention, it is possible to leave the bath safety device or to further relieve the load by means of an additional relief notch which is produced in one work step with the weld seam preparation. In this way, an additional, complex operation is saved in the course of the present invention without impairing the quality of the component obtained.
- Fig. 1 is a schematic overall view of an inventive
- FIG. 2 shows a schematic partial view of the mast structure of the concrete pump from FIG. 1; 3 shows a partial sectional view of a hydraulic cylinder with a concavely curved base area;
- FIG. 4 shows a partial sectional view of a hydraulic cylinder with a convexly curved base region
- FIG. 5 shows a first embodiment of the hydraulic cylinder according to the invention with an eye part arranged outside the cylinder container and a divided fastening bolt;
- FIG. 6 shows a second embodiment of the hydraulic cylinder according to the invention with an eye part arranged outside the cylinder container and a divided fastening bolt;
- FIG. 8 shows a further embodiment of the hydraulic cylinder according to the invention with a narrow eye part and a spherical bearing
- FIGS 9a, b a first embodiment of the hydraulic cylinder according to the invention with a bolt housing penetrating the cylinder container;
- FIGS. 10a, b show a further embodiment of the hydraulic cylinder according to the invention with a bolt housing penetrating the cylinder container;
- FIGS. 10a, b shows a detailed view of the hydraulic cylinder according to FIGS. 10a, b; and Figures 12 af detailed views - partly in section - of a further embodiment of the hydraulic cylinder according to the invention.
- the device 1 shows a device 1 according to the invention with a mast structure 2 in the form of a self-propelled concrete pump.
- the device 1 has a truck chassis 3 with a driver's cab 4 and a chassis support 5, on which a slewing gear 6 for the mast structure 2 is arranged.
- the mast structure 2 itself has a number of articulated mast arms, which is explained below with reference to FIG. 2.
- a concrete pump not explicitly shown, is furthermore built on the chassis 3, the filling funnel 7 of which, via which the concrete pump is acted upon by a mixer (not shown), is arranged at the rear of the vehicle.
- a conveyor device (not shown) for the concrete conveyed by the concrete pump is also provided on the mast structure 2, so that the concrete can be conveyed along the mast structure to any location within the range of the unfolded mast structure 2.
- FIG. 2 shows a schematic detailed view of the mast structure 2 from FIG. 1 in its unfolded state.
- the mast structure 2 has at least two mast arms 9, 10 connected to one another via a joint 8, one of which 10 can be pivoted relative to the other mast arm 9 by a hydraulic cylinder 11.
- the hydraulic cylinder 11 has, in a manner known per se, an essentially tubular cylinder container 12 in which a piston 13 is slidably received.
- the cylinder container 12 of the hydraulic cylinder 11 is articulated in a first pivot point 14 to a bearing part 15 of the first mast arm 9, while the piston 13 of the hydraulic cylinder 11 is fastened to a pivot point 17 of the second mast arm 10 via a piston rod 16.
- FIG. 3 shows a partial sectional view of a hydraulic cylinder 11 according to the present invention. Shown is the cylinder container 12 of a hydraulic cylinder 11, which, according to the exemplary embodiment shown, has rich 18 is closed on one side, wherein the bottom region 18 is designed in the manner of a hemisphere with respect to the interior 19 of the cylinder container 12 concave, that is curved outwards.
- the cylinder container 12 is formed in two parts from a cylinder tube 20 and a hemispherical base piece 21, which are connected via a weld seam 22.
- the cylinder container 12 can also be formed in one piece, in particular as a cast part.
- the cylinder container 12 is again formed from a cylinder tube 20 and a welded-on base piece 21, but the base piece 21 is arranged such that it is convex with respect to the interior 19 of the cylinder container 12, ie inwardly curved base region 18 forms.
- FIG. 2 the cylinder container 12 of the hydraulic cylinder 11 according to the invention is articulated on a first mast arm 9 of the mast arm arrangement 2.
- FIG. 5 shows a corresponding development according to the invention of the cylinder container 12 according to FIG. 3, in which the cylinder container 12 is extended beyond the curved base area 18 by means of an annular eye part 23.
- the eye part 23 has in its jacket diametrically opposite one another two eye openings 24, 24 ', through which a short fastening bolt 25 or 25' is guided, which for articulated fastening of the hydraulic cylinder 11 on the mast arm 9 with pairs provided on the mast arm of bearing elements 15, 15 'cooperates.
- the ring-shaped eye part 23 is connected to the cylinder container 12 by welding (weld seam 22).
- FIG. 6 shows a corresponding further development of the hydraulic cylinder 11 according to the invention according to FIG. 4.
- no additional eye part 23 is provided, but rather the bottom piece 21 of the cylinder container 12 downwards, ie extended at its open end and thus takes over the function of the ring-shaped eye part 23 according to FIG. 5.
- the bottom piece 21 has diametrically opposed eye openings 24, 24 ', into each of which a short fastening bolt 25, 25' is inserted.
- the fastening bolts 25, 25 ' in turn interact with pairs of bearing elements 15, 15' which are provided on the mast arm 9 according to FIG. 2.
- FIG. 7 shows alternative designs of the hydraulic cylinders 11 according to the invention described above with reference to FIGS. 5 and 6.
- a further development of the object of FIG. 5 is shown, in which only one continuous fastening bolt instead of two Fastening bolt 25 is present, which is guided in a continuous bolt bearing tube 26 extending between the eye openings 24, 24 'in the manner of a bolt housing.
- the right part of FIG. 7 shows a corresponding configuration for a hydraulic cylinder 11 according to FIGS. 4 and 6, i.e. a hydraulic cylinder with a convexly curved base region 18.
- FIGS. 5 to 7 shows a further embodiment of the hydraulic cylinder 11 according to the invention, in which the eye part is not designed as a connecting ring according to FIGS. 5 to 7, but as a narrow rib 27.
- a narrow, rib-shaped eye part 27 is arranged, preferably welded, at an apex of the curvature of the curved bottom area 18 of the cylinder container 12.
- the eye part 27 has an opening 28 oriented perpendicular to a longitudinal axis L of the cylinder container 12, in which an articulated bearing 29 is provided.
- the spherical bearing 29 has a continuous fastening bolt 25, which in turn interacts with suitable bearing elements 15, 15 'on the first mast arm 9 of the multi-part mast structure 2 (FIGS. 1, 2).
- the cylinder container 12 has a uniform hemispherical curvature in its bottom region 18 on its inside 30, ie facing the interior 19 of the cylinder container 12, and on its outside 31, ie facing away from the interior 19 of the cylinder container 12, an uneven, especially parabolic curvature. This leads to a slight thickening of the bottom area 18 of the cylinder container. ters 12 at the apex of the curvature, in which - as I said - the rib-shaped eye part 27 is arranged.
- FIGS. 9 to 11 show configurations of the hydraulic cylinder 11 according to the invention in which the fastening bolt 25 and the bolt bearing tube 26 (see FIG. 7) show the interior 19 penetrate the cylinder container 12.
- FIGS. 9a, b show a cylinder container 12 of a hydraulic cylinder 11 according to the invention with an outwardly curved hemispherical base region 18 (see FIG. 3), in which a bolt bearing tube 26 for a fastening bolt, not shown, penetrates the interior 19 of the cylinder container 12 in one area, which is defined (delimited) by the curved bottom region 18 of the cylinder container 12.
- the cylinder container 12 and the pin bearing tube 26 can be formed together in one piece (for example as a cast part).
- a two-piece design of the cylinder container 12 according to FIG. 3 is also possible, only the base piece 21 (FIG. 3) and the pin bearing tube 26 being formed in one piece as a casting.
- the bolt bearing tube 26 is arranged at a certain minimum distance D from the inner wall 30 of the cylinder container 12 in the bottom region 18 thereof.
- the pin bearing tube 26 has a circular cross section, as can be seen, for example, from FIG. 9b, but the invention is not defined therein. Rather, the pin bearing tube 26 can also have a non-circular, approximately rectangular, square, triangular or elliptical cross section.
- the center point of the pin bearing tube 26 is arranged on the longitudinal axis L of the cylinder container, other configurations are also possible. For example, in a further advantageous embodiment - -
- the center of the bolt bearing tube can be laterally offset by a distance from the longitudinal axis L.
- FIGS. 10a, b show an embodiment of the hydraulic cylinder 11 according to the invention, in which the pin bearing tube 26 touches the inner wall 30 of the cylinder container 12 in its bottom region 18.
- the base piece 21 (FIG. 3) of the cylinder container 12 and the pin bearing tube 26 are preferably formed in one piece (e.g. as a cast part).
- the cylinder container 12 is composed in two parts from a cylinder tube 20 and a base piece 21, preferably welded (weld seam 22), the base piece 21 of the cylinder container 12 towards its open end in a region 31 for stability reasons a thickening and in another area 32 has a recess on its inside 27.
- the pin bearing tube 26 is upwards, i.e. Extended trapezoidally in section in the direction of the cylinder interior 19, so that a stop 33 is created for the piston 13 movable within the cylinder container 12 (FIG. 2), the stop 33 preferably being located at the level of the recess 32.
- a casting contour of the base piece 21 is additionally shown before processing to form the thickening 31 or the recess 32.
- FIGS. 12a-f show a further embodiment of a base piece 21 of a hydraulic cylinder 11 according to the invention (cf. FIG. 3) in detail on the basis of a number of various (sectional) views.
- FIG. 12a a casting contour of the base piece 21 of a hydraulic cylinder according to the invention is again shown in section in the right part of the figure.
- FIG. 12a one that essentially corresponds to FIG. de Design of the base piece 21 with attached cylinder tube 20 after machining the cast contour (see. Fig. 1 1) shown.
- the base piece 21 has an inclined flattening 34 in the apex region of its curvature, to which an attachment 35 with a bore 36 connects - offset in the radial direction with respect to the longitudinal axis L of the base piece 21.
- the approach 35 serves as a specially machined flat surface for receiving a hydraulic valve that can be connected to the bore 36
- Fig. 12b shows a section along the line A-A (see Fig. 12d).
- This illustration shows, in particular in an area 37 of the curved bottom area 18, a radius of curvature R of the curved bottom area 18 which decreases from the outside in the direction of the longitudinal axis L of the bottom piece 21.
- FIGS. 12c and 12d show a side view and a top view of the base piece 21 according to FIGS. 12a, b, with FIG. 12d in particular showing a curvature of the stop 33, which is designed as a two-part projection, and runs approximately parallel to the outer contour of the base piece 21, which is circular in plan view can be seen (see also Fig. 12e).
- FIGS. 12e and 12f show a sectional view along the line BB in FIG. 12d and a view of the base piece 21 viewed from below (arrow X in FIG. 12e).
- the approach according to the invention with a penetration of the volume defined by the curved bottom region 18 of the cylinder container 12 offers the possibility of varying the eye width AB (FIG. 12d) compared to a width ZB (FIG. 12d) of the cylinder container 12 to relatively far beyond the last-mentioned width ZB, the increase in width (AB-ZB) being limited solely by the bending strength of the structure.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Forklifts And Lifting Vehicles (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Reciprocating Pumps (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Description
Hydraulikzylinder Hydraulic cylinder
Die vorliegende Erfindung betrifft einen Hydraulikzylinder für mehrteiligen Mastaufbau aus mindestens zwei gelenkig verbundenen Mastarmen, von denen einer durch den Hydraulikzylinder gegenüber dem anderen Mastarm verschwenkbar ist, insbesondere für Betonpumpen, Krane, Hebebühnen und dergleichen, mit einem in einem Bodenbereich einseitig geschlossenen Zylinderbehälter zur Aufnahme eines Kolbens.The present invention relates to a hydraulic cylinder for multi-part mast structure made up of at least two articulated mast arms, one of which can be pivoted by the hydraulic cylinder relative to the other mast arm, in particular for concrete pumps, cranes, lifting platforms and the like, with a cylinder container which is closed on one side in a floor area for receiving a Piston.
Weiterhin betrifft die vorliegende Erfindung eine Vorrichtung mit Mastaufbau mit mindestens zwei gelenkig verbundenen Mastarmen, von denen einer durch einen Hydraulikzylinder gegenüber dem anderen Mastarm verschwenkbar ist, insbesondere für Betonpumpen, Krane, Hebebühnen und dergleichen.Furthermore, the present invention relates to a device with a mast structure with at least two articulated mast arms, one of which can be pivoted relative to the other mast arm by a hydraulic cylinder, in particular for concrete pumps, cranes, lifting platforms and the like.
So genannte Mastaufbauten aus einer Mehrzahl jeweils paarweise gelenkig miteinander verbundener Mastarme werden beispielsweise in der Bauwirtschaft dazu verwendet, fließfähige Baustoffe, wie Beton, von einem zentralen Anlieferungsort aus zu quasi beliebigen Verarbeitungsorten innerhalb der Reichweite des Mastaufbaus zu fördern. Um einen derartigen Mastaufbau in seiner Geometrie verändern zu können, sind jeweils zwei Mastarme des Mastaufbaus gelenkig miteinander verbunden und gegeneinander durch einen Hydraulikzylinder verschwenkbar.So-called mast structures made up of a plurality of mast arms, each of which is articulated in pairs, are used in the construction industry, for example, to convey flowable building materials, such as concrete, from a central delivery location to virtually any processing locations within the reach of the mast structure. In order to be able to change the geometry of such a mast structure, two mast arms of the mast structure are connected to one another in an articulated manner and pivotable relative to one another by means of a hydraulic cylinder.
Die Arbeitsmaschine Hydraulikzylinder ist dabei hinsichtlich der Statik ein Druckbehälter variabler Geometrie zur Abgabe und Aufnahme von Kräften. In der Regel ist das Gehäuse des Hydraulikzylinders, im Folgenden auch als Zylinderbehälter bezeichnet, aus einem (Zylinder-) Rohr mit einem angeschweißten Bodenstück gebildet. Das Bodenstück besteht dabei regelmäßig aus einem Vollzylinder mit Querbohrung für einen Lagerbolzen, der zum Befestigen des Hydraulikzylinders an einem der Mastarme vorgesehen ist. Alternativ kann das Bodenstück auch in Form einer Scheibe mit angeschweißtem Querrohr als Bolzenlager ausgebildet sein. Je nach Verwendungszweck des Hydraulikzylinders ist das entsprechende Bolzenauge schmal ausgebildet und mit einem Gelenklager ausgestattet, oder es erreicht die Breite des Behälters bzw. ragt seitlich über diesen hinaus. Bei hoch belastbaren Leichtbauzylindern ist das Bodenstück als sorgfaltig bearbeitete Scheibe höchstwertig mit dem Zylinderrohr verschweißt. Das Bolzenlager ist gleichfalls in aufwändiger Weise mit der Bodenstückscheibe verbunden. Dabei verbessert die Ausbildung des Bodenstücks als Stahlgussteil die Stabilitätseigenschaften der vorstehend beschriebenen Lösung.In terms of statics, the hydraulic cylinder machine is a pressure vessel of variable geometry for delivering and absorbing forces. As a rule, the housing of the hydraulic cylinder, hereinafter also referred to as the cylinder container, is formed from a (cylinder) tube with a welded-on base piece. The base piece regularly consists of a solid cylinder with a transverse bore for a bearing pin, which is provided for fastening the hydraulic cylinder to one of the mast arms. Alternatively, the base piece can also be designed in the form of a disk with a welded-on cross tube as a pin bearing. Depending on the intended use of the hydraulic cylinder, the corresponding bolt eye is narrow and equipped with a spherical bearing, or it reaches the width of the container or protrudes laterally beyond this. In the case of heavy-duty lightweight cylinders, the base section is welded to the cylinder tube as a carefully machined disc. The pin bearing is also connected in a complex manner to the base plate. The design of the base piece as a steel casting improves the stability properties of the solution described above.
Aus Sicht des Kraftflusses ist der vorstehend beschriebene Abschluss eines unter Innendruck stehenden (kreis-)zylindrischen Behälters mit einer Scheibe bzw. eben, d. h. plan ausgeführtem Bodenteil aus Gründen der Kraftaufnahme und -abstützung gewichts- und kerbintensiv. Um damit verbundene Nachteile zu vermeiden, sind bei vorbekannten Hydraulikzylindern aufwändige Schweißnahtvorbereitungen und Hinterdrehungen vorgesehen, sodass derartige Hydraulikzylinder in der Herstellung materialaufwändig und entsprechend kostenintensiv sind.From the point of view of the force flow, the above-described closure of a (circular) cylindrical container under internal pressure with a disk or flat, ie. H. flat floor part, for reasons of force absorption and support, weight and notch-intensive. In order to avoid the disadvantages associated therewith, elaborate weld seam preparations and back-turning are provided in known hydraulic cylinders, so that such hydraulic cylinders are material-intensive to manufacture and correspondingly cost-intensive.
Der Erfindung liegt die Aufgabe zu Grunde unter Vermeidung der vorstehend genannten Nachteile einen Hydraulikzylinder zu schaffen, der aufgrund eines verbesserten Kraftflusses mit reduziertem Materialaufwand und dadurch reduziertem Gesamtgewicht bei zugleich zumindest gleichwertiger oder verbesserter Stabilität herstellbar ist. Darüber hinaus liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung mit Mastaufbau zu schaffen, die sich gegenüber bekannten Vorrichtung dieser Art insbesondere durch ein geringeres Gesamtgewicht sowie verbesserte Be- wegungs- und Stabilitätseigenschaften auszeichnet.The invention is based on the object, while avoiding the disadvantages mentioned above, of creating a hydraulic cylinder which, owing to an improved flow of force, can be produced with a reduced amount of material and thus a reduced overall weight with at least equivalent or improved stability. In addition, the invention is based on the object of providing a device with a mast structure which, in comparison with known devices of this type, is distinguished in particular by a lower overall weight and improved movement and stability properties.
Die Aufgabe wird bei einem Hydraulikzylinder der eingangs genannten Art dadurch gelöst, dass der Bodenbereich des Zylinderbehälters gewölbt ausgebildet ist.In a hydraulic cylinder of the type mentioned at the outset, the object is achieved in that the bottom region of the cylinder container is curved.
Bei einer Vorrichtung mit Mastaufbau der eingangs genannten Art wird die Aufgabe dadurch gelöst, dass die Vorrichtung wenigstens einen erfindungsgemäßen Hydraulikzylinder zum Verschwenken der Mastarme aufweist. Demnach besteht der Grundgedanke des erfindungsgemäßen Ansatzes darin, das herkömmlicher Weise regelmäßig in Form einer Scheibe ausgebildete Bodenstück des Hydraulikzylinders durch eine gewölbte Schale zu ersetzen, wobei insbesondere eine Halbkugelform die aus statischer Sicht optimale Formgebung darstellt und entsprechend die geringste Wandstärke bei maximaler Gewichtsreduzierung erfordert.In a device with a mast structure of the type mentioned in the introduction, the object is achieved in that the device has at least one hydraulic cylinder according to the invention for pivoting the mast arms. Accordingly, the basic idea of the approach according to the invention is to replace the bottom part of the hydraulic cylinder, which is conventionally formed in the form of a disc, with a curved shell, in particular a hemisphere shape which, from a static point of view, represents the optimal shape and accordingly requires the smallest wall thickness with maximum weight reduction.
In diesem Zusammenhang sieht eine bevorzugte Weiterbildung des erfindungsgemäßen Hydraulikzylinders vor, dass der Bodenbereich in Bezug auf den Zylinderbehälter konkav, d.h. nach außen gewölbt, ausgebildet ist, wodurch sich ein besonders günstiger Kraftfluss ergibt. Alternativ kann jedoch in Weiterentwicklung des erfindungsgemäßen Hydraulikzylinders vorgesehen sein, dass der Bodenbereich in Bezug auf den Zylinderbehälter konvex, d.h. nach innen gewölbt, ausgebildet ist.In this context, a preferred development of the hydraulic cylinder according to the invention provides that the bottom area is concave with respect to the cylinder container, i.e. curved outwards, is formed, which results in a particularly favorable flow of force. Alternatively, however, in a further development of the hydraulic cylinder according to the invention it can be provided that the bottom area is convex, i.e. arched inwards, is formed.
Um eine gleichmäßige Belastung des Zylinderbehälters in seinem Bodenbereich zu erreichen, kann weiterhin bei einem erfindungsgemäßen Hydraulikzylinder vorgesehen sein, dass der Bodenbereich im Schnitt eine gleichmäßige Krümmung aufweist, wobei der Bodenbereich einer besonders bevorzugten Weiterbildung des erfindungsgemäßen Hydraulikzylinders als Kugelabschnitt, insbesondere als Halbkugelschale, ausgebildet ist.In order to achieve a uniform loading of the cylinder container in its bottom area, it can further be provided in a hydraulic cylinder according to the invention that the bottom area has a uniform curvature on average, the bottom area of a particularly preferred development of the hydraulic cylinder according to the invention being designed as a spherical section, in particular as a hemispherical shell .
Alternativ ist es jedoch auch möglich, den Hydraulikzylinder im Bodenbereich des Zylinderbehälters mit einer im Schnitt ungleichmäßigen Krümmung auszubilden. Dabei sieht eine weitere Ausgestaltung des erfindungsgemäßen Hydraulikzylinders vor, dass der Bodenbereich des Zylinderbehälters als Paraboloid ausgebildet ist.Alternatively, however, it is also possible to design the hydraulic cylinder in the base region of the cylinder container with a curvature which is uneven in section. A further embodiment of the hydraulic cylinder according to the invention provides that the bottom region of the cylinder container is designed as a paraboloid.
Um weiterhin eine möglichst gleichmäßige Belastung des erfindungsgemäßen Hydraulikzylinders in seinem Bodenbereich zu erreichen, kann gemäß einer weiteren Ausgestaltung des erfindungsgemäßen Hydraulikzylinders vorgesehen sein, dass der Bodenbereich im Schnitt symmetrisch bezüglich einer Längsachse des Zylinderbehälters ausgebildet ist. - A -In order to continue to achieve the most uniform possible loading of the hydraulic cylinder according to the invention in its bottom area, it can be provided according to a further embodiment of the hydraulic cylinder according to the invention that the bottom area is symmetrical in section with respect to a longitudinal axis of the cylinder container. - A -
Wenn der erfindungsgemäße Hydraulikzylinder zwecks einer Verwendung mit einer an sich bekannten Mastarmstruktur eingesetzt werden soll, wird es erforderlich sein, im Bodenbereich des Zylinderbehälters ein Lagerauge in Form eines Augenteils, d.h. eines Bauteil mit wenigstens einem solchen Lagerauge vorzusehen. Um in diesem Zusammenhang eine Belastbarkeit des Zylinderbehälters in seinem Bodenbereich durch Erhöhung der Wandstärke bei gleichzeitiger Beibehaltung der gewölbten Formgebung zu erreichen, sieht eine besonders bevorzugte Ausgestaltung des erfindungsgemäßen Hydraulikzylinders vor, dass der Bodenbereich an seiner Innenseite als Kugelabschnitt, insbesondere als Halbkugel, und an seiner Außenseite als Paraboloid ausgebildet ist, wodurch sich die gewünschte Erhöhung der Wandstärke speziell im Scheitelbereich der Wölbung ergibt, sodass vorzugsweise dort ein Lagerauge (Augenteil) angeordnet werden kann.If the hydraulic cylinder according to the invention is to be used for use with a mast arm structure known per se, it will be necessary to place a bearing eye in the form of an eye part in the bottom region of the cylinder container, i.e. to provide a component with at least one such bearing eye. In order to achieve a resilience of the cylinder container in its base area by increasing the wall thickness while maintaining the curved shape, a particularly preferred embodiment of the hydraulic cylinder according to the invention provides that the base area on its inside as a spherical section, in particular as a hemisphere, and on it Outside is designed as a paraboloid, which results in the desired increase in wall thickness, especially in the apex area of the curvature, so that preferably a bearing eye (eye part) can be arranged there.
In Weiterbildung einer derartigen Ausgestaltung des erfindungsgemäßen Hydraulikzylinders ist es insbesondere möglich, das Augenteil in Form einer schmalen Rippe mit Gelenklager auszubilden, wodurch eine größtmögliche Beweglichkeit des Hydraulikzylinders bezüglich der Mastarme gegeben ist.In a further development of such a configuration of the hydraulic cylinder according to the invention, it is in particular possible to design the eye part in the form of a narrow rib with a spherical bearing, as a result of which the hydraulic cylinder can be moved as much as possible with respect to the mast arms.
Gemäß einer weiteren vorteilhaften Ausgestaltung des erfindungsgemäßen Hydraulikzylinders kann das Zylinderrohr zur Ausleitung von Reaktions- oder Lagerkräften über den gewölbten Bodenbereich hinaus verlängert werden, wobei in den somit hinzugewonnenen Bauraum die Lageraugen für den Lagerbolzen zum Befestigen des Hydraulikzylinders an einem der Mastarme eingesetzt werden können. Entsprechend ist dazu gemäß einer erfindungsgemäßen Weiterbildung des Hydraulikzylinders vorgesehen, dass das Augenteil als ein den Zylinderbehälter über seinen Bodenbereich hinaus verlängerndes Ringteil ausgebildet ist, das in seinem Mantel zwei einander gegenüberliegend angeordnete Augenöffnungen zum Aufnehmen wenigstens eines Befestigungsbolzens aufweist. Erfindungsgemäß besteht entsprechend die Möglichkeit, entweder einen geteilten Bolzen mit mehrschnittigem An- schluss oder einen durchgehenden Bolzen mit zweischnittigem Anschluss einzusetzen. Bei konkaver Ausbildung des Bodenbereichs ergibt sich die vorstehend beschriebene Verlängerung des Zylinderbehälters über den Bodenbereich hinaus zweckmäßiger Weise durch Ansetzen eines zusätzlichen Ringteils, wohingegen bei konvexer Wölbung des Bodenbereichs dieser bzw. das entsprechende Bodenstück selbst nach unten hin über den Zylinderbehälter hinaus verlängert sein kann, sodass kein weiteres Ringteil vorzusehen ist.According to a further advantageous embodiment of the hydraulic cylinder according to the invention, the cylinder tube can be extended beyond the curved floor area in order to divert reaction or bearing forces, the bearing eyes for the bearing pin for fastening the hydraulic cylinder to one of the mast arms being able to be used in the additional space thus gained. Accordingly, according to a further development of the hydraulic cylinder according to the invention, it is provided that the eye part is designed as an annular part which extends the cylinder container beyond its base region and has two eye openings arranged opposite one another in its jacket for receiving at least one fastening bolt. According to the invention, there is correspondingly the possibility of using either a split bolt with a multi-section connection or a continuous bolt with a two-section connection. In the case of a concave design of the base region, the above-described extension of the cylinder container beyond the base region expediently results from the attachment of an additional ring part, whereas if the base region is convexly curved, this or the corresponding base piece itself can be extended downward beyond the cylinder container, so that no further ring part is to be provided.
Bei deutlicher Reduktion des Gesamtgewichts des erfindungsgemäßen Hydraulikzylinders gegenüber herkömmlichen Zylinderkonstruktionen benötigt ein außerhalb des Druckbereichs des Hydraulikzylinders geführter Befestigungsbolzen jedoch eine relativ große Totlänge des Zylinders in dessen Bodenbereich. Steht allerdings ein entsprechender Einbauraum für den Hydraulikzylinder zur Verfügung, kann das Bolzenauge auch in den Druckbereich des Hydraulikzylinders hinein verlegt werden und diesen durchdringen. Eine entsprechende bevorzugte Weiterbildung des erfindungsgemäßen Hydraulikzylinders sieht demnach vor, dass das Augenteil als den Zylinderbehälter durchsetzendes Bolzenlagerrohr ausgebildet ist.With a significant reduction in the total weight of the hydraulic cylinder according to the invention compared to conventional cylinder constructions, a fastening bolt guided outside the pressure range of the hydraulic cylinder, however, requires a relatively large dead length of the cylinder in its bottom region. However, if there is a corresponding installation space for the hydraulic cylinder, the bolt eye can also be moved into the pressure area of the hydraulic cylinder and penetrate it. A corresponding preferred development of the hydraulic cylinder according to the invention accordingly provides that the eye part is designed as a bolt bearing tube which penetrates the cylinder container.
Um das verfügbare Arbeitsvolumen des Hydraulikzylinders nicht zu beeinträchtigen, ist in Weiterbildung des erfindungsgemäßen Hydraulikzylinders vorgesehen, dass das Bolzenlagerrohr innerhalb eines durch den Bodenbereich definierten Volumens angeordnet ist.In order not to impair the available working volume of the hydraulic cylinder, a further development of the hydraulic cylinder according to the invention provides that the pin bearing tube is arranged within a volume defined by the floor area.
In Weiterbildung des erfindungsgemäßen Hydraulikzylinders kann vorgesehen sein, dass das Bolzenlagerrohr den Bodenbereich des Zylinderbehälters, d.h. eine Wand des Zylinderbehälters berührt. Im Zuge einer derartigen Ausgestaltung kann der Zylinderbehälter in seinem Bodenbereich einstückig als Gussteil mit verbesserten Stabilitätseigenschaften ausgebildet werden.In a further development of the hydraulic cylinder according to the invention it can be provided that the bolt bearing tube covers the bottom region of the cylinder container, i.e. touches a wall of the cylinder container. In the course of such a configuration, the cylinder container can be formed in one piece in its base region as a cast part with improved stability properties.
Alternativ ist es nach einer Weiterbildung des erfindungsgemäßen Hydraulikzylinders auch möglich, das Bolzenlagerrohr in einem Abstand zu dem Bodenbereich des Zylinderbehälters anzuordnen. Eine solche Konstruktion hat den Vorteil, dass das Bolzenlagerrohr noch nach Herstellung des Zylinderbehälters durch beidseitiges Öffnen des letzteren als Schweißkonstruktion nachträglich in diesen eingesetzt werden kann.Alternatively, according to a further development of the hydraulic cylinder according to the invention, it is also possible to arrange the pin bearing tube at a distance from the bottom region of the cylinder container. Such a construction has the advantage that the bolt bearing tube can still be produced on both sides after the cylinder container has been manufactured Opening the latter as a welded construction can be used subsequently in this.
Wie vorstehend erwähnt, können der Bodenbereich und das Bolzenlagerrohr gemeinsam einstückig, insbesondere als Gussteil, ausgebildet sein. Der Anschluss dieses Gussteils an ein Zylinderrohr zur Bildung eines Zylinderbehälters erfolgt durch eine ringförmige Schweißnaht. Die dazu erforderliche Nahtvorbereitung beinhaltet auch die Ausbildung der erforderlichen Badsicherung der Schweißnaht. Durch den erfindungsgemäß günstigen Kraftfluss ist es möglich, die Badsicherung zu belassen oder durch eine zusätzliche Entlastungskerbe, die in einem Arbeitsgang mit der Schweißnahtvorbereitung gefertigt wird, weiter zu entlasten. Auf diese Weise wird im Zuge der vorliegenden Erfindung ein zusätzlicher, aufwändiger Arbeitsgang eingespart, ohne die Qualität des erhaltenen Bauteils zu beeinträchtigen.As mentioned above, the bottom area and the bolt bearing tube can be formed together in one piece, in particular as a cast part. This cast part is connected to a cylinder tube to form a cylinder container by means of an annular weld seam. The seam preparation required for this also includes the training of the necessary bath protection for the weld seam. Due to the favorable flow of force according to the invention, it is possible to leave the bath safety device or to further relieve the load by means of an additional relief notch which is produced in one work step with the weld seam preparation. In this way, an additional, complex operation is saved in the course of the present invention without impairing the quality of the component obtained.
Weiterhin ist es durch das Vorsehen des vorstehend erwähnten Durchdringungsrohrs für den Lagerbolzen (Bolzenlagerrohr) möglich, den Kolbenanschlag bei einem erfindungsgemäßen Hydraulikzylinder in einen belastungsmäßig günstigen Bereich zu verlegen. Hierfür sieht eine äußerst bevorzugte Weiterbildung des erfin- dungsgemäßen Hydraulikzylinders vor, dass an dem Bolzenlagerrohr ein Anschlag für den Kolben vorgesehen ist.Furthermore, by providing the above-mentioned penetration tube for the bearing pin (pin bearing tube), it is possible to move the piston stop in a hydraulic cylinder according to the invention in a range that is favorable in terms of load. For this purpose, an extremely preferred development of the hydraulic cylinder according to the invention provides that a stop for the piston is provided on the pin bearing tube.
Weitere Eigenschaften und Vorteile der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnung. Es zeigt/zeigen:Further properties and advantages of the present invention result from the following description of exemplary embodiments with reference to the drawing. It shows:
Fig. 1 eine schematische Gesamtansicht einer erfindungsgemäßenFig. 1 is a schematic overall view of an inventive
Vorrichtung mit Mastaufbau in einer Ausgestaltung als Betonpumpenfahrzeug;Device with mast structure in a configuration as a concrete pump vehicle;
Fig. 2 eine schematische Teilansicht des Mastaufbaus der Betonpumpe aus Fig. 1 ; Fig. 3 eine teilweise Schnittansicht eines Hydraulikzylinders mit konkav gewölbten Bodenbereich;FIG. 2 shows a schematic partial view of the mast structure of the concrete pump from FIG. 1; 3 shows a partial sectional view of a hydraulic cylinder with a concavely curved base area;
Fig. 4 eine teilweise Schnittansicht eines Hydraulikzylinders mit konvex gewölbten Bodenbereich;4 shows a partial sectional view of a hydraulic cylinder with a convexly curved base region;
Fig. 5 eine erste Ausgestaltung des erfindungsgemäßen Hydraulikzylinders mit außerhalb des Zylinderbehälters angeordnetem Augenteil und geteiltem Befestigungsbolzen;5 shows a first embodiment of the hydraulic cylinder according to the invention with an eye part arranged outside the cylinder container and a divided fastening bolt;
Fig. 6 eine zweite Ausgestaltung des erfindungsgemäßen Hydraulikzylinders mit außerhalb des Zylinderbehälters angeordnetem Augenteil und geteiltem Befestigungsbolzen;6 shows a second embodiment of the hydraulic cylinder according to the invention with an eye part arranged outside the cylinder container and a divided fastening bolt;
Fig. 7 Ausgestaltungen des erfindungsgemäßen Hydraulikzylinders gemäß den Figuren 5 und 6, jedoch mit durchgehendem Befestigungsbolzen;7 embodiments of the hydraulic cylinder according to the invention according to FIGS. 5 and 6, but with a continuous fastening bolt;
Fig. 8 eine weitere Ausgestaltung des erfindungsgemäßen Hydraulikzylinders mit schmalem Augenteil und Gelenklager;8 shows a further embodiment of the hydraulic cylinder according to the invention with a narrow eye part and a spherical bearing;
Figuren 9a, b eine erste Ausgestaltung des erfindungsgemäßen Hydraulikzylinders mit einem den Zylinderbehälter durchdringenden Bolzengehäuse;Figures 9a, b a first embodiment of the hydraulic cylinder according to the invention with a bolt housing penetrating the cylinder container;
Figuren 10a, b eine weitere Ausgestaltung des erfindungsgemäßen Hydraulikzylinders mit einem den Zylinderbehälter durchdringenden Bolzengehäuse;FIGS. 10a, b show a further embodiment of the hydraulic cylinder according to the invention with a bolt housing penetrating the cylinder container;
Fig. 1 1 eine Detailansicht des Hydraulikzylinders gemäß Fig. 10a, b; und Figuren 12 a-f detaillierte Ansichten - teilweise im Schnitt — einer weiteren Ausgestaltung des erfindungsgemäßen Hydraulikzylinders.1 1 shows a detailed view of the hydraulic cylinder according to FIGS. 10a, b; and Figures 12 af detailed views - partly in section - of a further embodiment of the hydraulic cylinder according to the invention.
Die Fig. 1 zeigt eine erfindungsgemäße Vorrichtung 1 mit Mastaufbau 2 in Form einer selbstfahrenden Betonpumpe. Die Vorrichtung 1 weist ein Lkw-Fahrgestell 3 mit einem Führerhaus 4 sowie einem Chassisträger 5 auf, auf dem ein Drehwerk 6 für den Mastaufbau 2 angeordnet ist. Der Mastaufbau 2 selbst besitzt eine Reihe von gelenkig miteinander verbundenen Mastarmen, was nachfolgend anhand der Fig. 2 erläutert wird. Auf dem Fahrgestell 3 ist gemäß dem gezeigten Ausführungsbeispiel weiterhin eine nicht explizit dargestellte Betonpumpe aufgebaut, deren Fülltrichter 7, über den die Betonpumpe von einem nicht gezeigten Mischer beaufschlagt wird, am Heck des Fahrzeugs angeordnet ist. An dem Mastaufbau 2 ist weiterhin eine nicht dargestellte Fördereinrichtung für den durch die Betonpumpe geförderten Beton vorgesehen, sodass der Beton entlang dem Mastaufbau zu einem beliebigen Ort innerhalb der Reichweite des entfalteten Mastaufbaus 2 förderbar ist.1 shows a device 1 according to the invention with a mast structure 2 in the form of a self-propelled concrete pump. The device 1 has a truck chassis 3 with a driver's cab 4 and a chassis support 5, on which a slewing gear 6 for the mast structure 2 is arranged. The mast structure 2 itself has a number of articulated mast arms, which is explained below with reference to FIG. 2. According to the exemplary embodiment shown, a concrete pump, not explicitly shown, is furthermore built on the chassis 3, the filling funnel 7 of which, via which the concrete pump is acted upon by a mixer (not shown), is arranged at the rear of the vehicle. A conveyor device (not shown) for the concrete conveyed by the concrete pump is also provided on the mast structure 2, so that the concrete can be conveyed along the mast structure to any location within the range of the unfolded mast structure 2.
Die Fig. 2 zeigt eine schematische Detailansicht des Mastaufbaus 2 aus Fig. 1 in seinem entfalteten Zustand. Der Mastaufbau 2 weist mindestens zwei über ein Gelenk 8 miteinander verbundene Mastarme 9, 10 auf, von denen einer 10 durch einen Hydraulikzylinder 1 1 gegenüber dem anderen Mastarm 9 verschwenkbar ist. Der Hydraulikzylinder 1 1 weist hierzu in an sich bekannter Weise einen im wesentlichen rohrförmigen Zylinderbehälter 12 auf, in dem ein Kolben 13 verschiebbar aufgenommen ist. Der Zylinderbehälter 12 des Hydraulikzylinders 1 1 ist in einem ersten Gelenkpunkt 14 an einem Lagerteil 15 des ersten Mastarms 9 angelenkt, während der Kolben 13 des Hydraulikzylinders 1 1 über eine Kolbenstange 16 an einem Gelenkpunkt 17 des zweiten Mastarms 10 befestigt ist.FIG. 2 shows a schematic detailed view of the mast structure 2 from FIG. 1 in its unfolded state. The mast structure 2 has at least two mast arms 9, 10 connected to one another via a joint 8, one of which 10 can be pivoted relative to the other mast arm 9 by a hydraulic cylinder 11. For this purpose, the hydraulic cylinder 11 has, in a manner known per se, an essentially tubular cylinder container 12 in which a piston 13 is slidably received. The cylinder container 12 of the hydraulic cylinder 11 is articulated in a first pivot point 14 to a bearing part 15 of the first mast arm 9, while the piston 13 of the hydraulic cylinder 11 is fastened to a pivot point 17 of the second mast arm 10 via a piston rod 16.
Die Fig. 3 zeigt eine teilweise Schnittansicht eines Hydraulikzylinders 11 gemäß der vorliegenden Erfindung. Dargestellt ist der Zylinderbehälter 12 eines Hydraulikzylinders 1 1 , der gemäß dem gezeigten Ausführungsbeispiel in seinem Bodenbe- reich 18 einseitig geschlossen ist, wobei der Bodenbereich 18 nach Art einer Halbkugel in Bezug auf den Innenraum 19 des Zylinderbehälters 12 konkav, d.h. nach außen gewölbt, ausgebildet ist. Beim Ausführungsbeispiel der Fig. 3 ist der Zylinderbehälter 12 zweistückig aus einem Zylinderohr 20 und einem halbkugelförmigen Bodenstück 21 gebildet, die über eine Schweißnaht 22 verbunden sind. Alternativ kann der Zylinderbehälter 12 allerdings auch einstückig, insbesondere als Gussteil, ausgebildet sein.3 shows a partial sectional view of a hydraulic cylinder 11 according to the present invention. Shown is the cylinder container 12 of a hydraulic cylinder 11, which, according to the exemplary embodiment shown, has rich 18 is closed on one side, wherein the bottom region 18 is designed in the manner of a hemisphere with respect to the interior 19 of the cylinder container 12 concave, that is curved outwards. In the embodiment of FIG. 3, the cylinder container 12 is formed in two parts from a cylinder tube 20 and a hemispherical base piece 21, which are connected via a weld seam 22. Alternatively, the cylinder container 12 can also be formed in one piece, in particular as a cast part.
Gemäß der in Fig. 4 gezeigten Ausgestaltung des erfindungsgemäßen Hydraulikzylinders ist der Zylinderbehälter 12 wiederum aus einem Zylinderrohr 20 und einem angeschweißten Bodenstück 21 gebildet, wobei jedoch das Bodenstück 21 derart angeordnet ist, dass es einen in Bezug auf den Innenraum 19 des Zylinderbehälters 12 konvex, d.h. nach innen gewölbten Bodenbereich 18 bildet.According to the embodiment of the hydraulic cylinder according to the invention shown in FIG. 4, the cylinder container 12 is again formed from a cylinder tube 20 and a welded-on base piece 21, but the base piece 21 is arranged such that it is convex with respect to the interior 19 of the cylinder container 12, ie inwardly curved base region 18 forms.
Gemäß der Fig. 2 ist der Zylinderbehälter 12 des erfindungsgemäßen Hydraulikzylinders 1 1 an einem ersten Mastarm 9 der Mastarmanordnung 2 angelenkt. Die Fig. 5 zeigt eine entsprechende erfindungsgemäße Weiterbildung des Zylinderbehälters 12 gemäß der Fig. 3, bei der der Zylinderbehälter 12 über den gewölbten Bodenbereich 18 hinaus mittels eines ringförmigen Augenteils 23 verlängert ist. Das Augenteil 23 weist in seinem Mantel einander diametral gegenüberliegend zwei Augenöffnungen 24, 24' auf, durch die jeweils ein kurzer Befestigungsbolzen 25 bzw. 25' geführt ist, der zum gelenkigen Befestigen des Hydraulikzylinders 1 1 an dem Mastarm 9 mit an dem Mastarm vorgesehenen Paaren von Lagerelementen 15, 15' zusammenwirkt. Gemäß einer bevorzugten Ausführungsform ist das ringförmige Augenteil 23 durch Schweißen (Schweißnaht 22) mit dem Zylinderbehälter 12 verbunden.According to FIG. 2, the cylinder container 12 of the hydraulic cylinder 11 according to the invention is articulated on a first mast arm 9 of the mast arm arrangement 2. FIG. 5 shows a corresponding development according to the invention of the cylinder container 12 according to FIG. 3, in which the cylinder container 12 is extended beyond the curved base area 18 by means of an annular eye part 23. The eye part 23 has in its jacket diametrically opposite one another two eye openings 24, 24 ', through which a short fastening bolt 25 or 25' is guided, which for articulated fastening of the hydraulic cylinder 11 on the mast arm 9 with pairs provided on the mast arm of bearing elements 15, 15 'cooperates. According to a preferred embodiment, the ring-shaped eye part 23 is connected to the cylinder container 12 by welding (weld seam 22).
Die Fig. 6 zeigt eine entsprechende Weiterentwicklung des erfindungsgemäßen Hydraulikzylinders 1 1 gemäß der Fig. 4. Im Unterschied zur Ausgestaltung gemäß der vorstehend beschriebenen Fig. 5 ist gemäß der Fig. 6 kein zusätzliches Augenteil 23 vorgesehen, sondern das Bodenstück 21 des Zylinderbehälters 12 ist nach unten hin, d.h. an seinem offenen Ende verlängert und übernimmt so die Funktion des ringförmigen Augenteils 23 gemäß der Fig. 5. Entsprechend weist gemäß der Fig. 6 das Bodenstück 21 einander diametral gegenüberliegend angeordnete Augenöffnungen 24, 24' auf, in die jeweils ein kurzer Befestigungsbolzen 25, 25' eingebracht ist. Entsprechend der Darstellung in Fig. 5 wirken die Befestigungsbolzen 25, 25' wiederum mit Paaren von Lagerelementen 15, 15' zusammen, die gemäß der Fig. 2 an dem Mastarm 9 vorgesehen sind.FIG. 6 shows a corresponding further development of the hydraulic cylinder 11 according to the invention according to FIG. 4. In contrast to the configuration according to FIG. 5 described above, according to FIG. 6 no additional eye part 23 is provided, but rather the bottom piece 21 of the cylinder container 12 downwards, ie extended at its open end and thus takes over the function of the ring-shaped eye part 23 according to FIG. 5. Correspondingly, according to FIG. 6, the bottom piece 21 has diametrically opposed eye openings 24, 24 ', into each of which a short fastening bolt 25, 25' is inserted. According to the representation in FIG. 5, the fastening bolts 25, 25 'in turn interact with pairs of bearing elements 15, 15' which are provided on the mast arm 9 according to FIG. 2.
Die Fig. 7 zeigt alternative Gestaltungsformen der vorstehend anhand der Figuren 5 und 6 beschriebenen erfindungsgemäßen Hydraulikzylinder 1 1. Hierbei ist im linken Teil der Fig. 7 eine Weiterentwicklung des Gegenstands der Fig. 5 gezeigt, bei dem anstelle von zwei kurzen Befestigungsbolzen nur ein durchgehender Befestigungsbolzen 25 vorhanden ist, der in einem durchgehenden, sich zwischen den Augenöffnungen 24, 24' erstreckenden Bolzenlagerrohr 26 nach Art eines Bolzengehäuses geführt ist. Der rechte Teil der Fig. 7 zeigt eine entsprechende Ausgestaltung bei einem Hydraulikzylinder 11 gemäß den Figuren 4 bzw. 6, d.h. einem Hydraulikzylinder mit konvex gewölbtem Bodenbereich 18.FIG. 7 shows alternative designs of the hydraulic cylinders 11 according to the invention described above with reference to FIGS. 5 and 6. Here, in the left part of FIG. 7, a further development of the object of FIG. 5 is shown, in which only one continuous fastening bolt instead of two Fastening bolt 25 is present, which is guided in a continuous bolt bearing tube 26 extending between the eye openings 24, 24 'in the manner of a bolt housing. The right part of FIG. 7 shows a corresponding configuration for a hydraulic cylinder 11 according to FIGS. 4 and 6, i.e. a hydraulic cylinder with a convexly curved base region 18.
Die Fig. 8 zeigt eine weitere Ausgestaltung des erfindungsgemäßen Hydraulikzylinders 1 1 , bei dem das Augenteil nicht als Anschlussring gemäß den Figuren 5 bis 7, sondern als schmale Rippe 27 ausgebildet ist. Hierzu ist ein schmales, rippen- förmiges Augenteil 27 in einem Scheitelpunkt der Wölbung des gewölbten Bodenbereichs 18 des Zylinderbehälters 12 angeordnet, vorzugsweise angeschweißt. Das Augenteil 27 weist einen senkrecht zu einer Längsachse L des Zylinderbehälters 12 orientierten Durchbruch 28 auf, in dem ein Gelenklager 29 vorgesehen ist. Das Gelenklager 29 weist einen durchgehenden Befestigungsbolzen 25 auf, der wiederum mit geeigneten Lagerelementen 15, 15' an dem ersten Mastarm 9 des mehrteiligen Mastaufbaus 2 (Fig. 1 , 2) zusammenwirkt. Aus Stabilitätsgründen weist der Zylinderbehälter 12 in seinem Bodenbereich 18 an seiner Innenseite 30, d.h. dem Innenraum 19 des Zylinderbehälters 12 zugewandt eine gleichmäßige halbkugelförmige Krümmung und an seiner Außenseite 31 , d.h. dem Innenraum 19 des Zylinderbehälters 12 abgewandt, eine ungleichmäßige, speziell parabelförmige Krümmung auf. Dies führt zu einer leichten Verdickung des Bodenbereichs 18 des Zylinderbehäl- ters 12 im Scheitelpunkt der Krümmung, in dem - wie gesagt — das rippenförmige Augenteil 27 angeordnet ist.8 shows a further embodiment of the hydraulic cylinder 11 according to the invention, in which the eye part is not designed as a connecting ring according to FIGS. 5 to 7, but as a narrow rib 27. For this purpose, a narrow, rib-shaped eye part 27 is arranged, preferably welded, at an apex of the curvature of the curved bottom area 18 of the cylinder container 12. The eye part 27 has an opening 28 oriented perpendicular to a longitudinal axis L of the cylinder container 12, in which an articulated bearing 29 is provided. The spherical bearing 29 has a continuous fastening bolt 25, which in turn interacts with suitable bearing elements 15, 15 'on the first mast arm 9 of the multi-part mast structure 2 (FIGS. 1, 2). For reasons of stability, the cylinder container 12 has a uniform hemispherical curvature in its bottom region 18 on its inside 30, ie facing the interior 19 of the cylinder container 12, and on its outside 31, ie facing away from the interior 19 of the cylinder container 12, an uneven, especially parabolic curvature. This leads to a slight thickening of the bottom area 18 of the cylinder container. ters 12 at the apex of the curvature, in which - as I said - the rib-shaped eye part 27 is arranged.
Alternativ zu den vorstehend beschriebenen Ausgestaltungen des erfindungsgemäßen Hydraulikzylinders mit innerhalb des Zylinderbehälters angeordnetem Auge zeigen die nachfolgenden Figuren 9 bis 1 1 Ausgestaltungen des erfindungsgemäßen Hydraulikzylinders 1 1 , bei denen der Befestigungsbolzen 25 bzw. das Bolzenlagerrohr 26 (vgl. Fig. 7) den Innenraum 19 des Zylinderbehälters 12 durchdringen.As an alternative to the above-described configurations of the hydraulic cylinder according to the invention with the eye arranged inside the cylinder container, the following FIGS. 9 to 11 show configurations of the hydraulic cylinder 11 according to the invention in which the fastening bolt 25 and the bolt bearing tube 26 (see FIG. 7) show the interior 19 penetrate the cylinder container 12.
Die Figuren 9a, b zeigen einen Zylinderbehälter 12 eines erfindungsgemäßen Hydraulikzylinders 1 1 mit nach außen gewölbtem halbkugelförmigen Bodenbereich 18 (vgl. Fig. 3), bei dem ein Bolzenlagerrohr 26 für einen nicht gezeigten Befestigungsbolzen den Innenraum 19 des Zylinderbehälters 12 in einem Bereich durchdringt, der durch den gewölbten Bodenbereich 18 des Zylinderbehälters 12 definiert (umgrenzt) ist. Der Zylinderbehälter 12 und das Bolzenlagerrohr 26 können dabei gemeinsam einstückig (z.B. als Gussteil) ausgebildet sein. Alternativ ist auch eine zweistückige Ausgestaltung des Zylinderbehälters 12 gemäß der Fig. 3 möglich, wobei nur das Bodenstück 21 (Fig. 3) und das Bolzenlagerrohr 26 einstückig als Gussteil ausgebildet sind. Schließlich ist jedoch auch eine weitere Ausgestaltung möglich, bei der der Zylinderbehälter 12 bzw. dessen Bodenstück 21 (Fig. 3) zweiseitig geöffnet wird, sodass anschließend das Bolzenlagerrohr 26 als eigenständiges Bauteil durch den Zylinderbehälter 12 durchführbar und mit diesem verschweißbar ist. Dabei ist gemäß den Figuren 9a, b das Bolzenlagerrohr 26 in einem gewissen Mindestabstand D von der Innenwand 30 des Zylinderbehälters 12 in dessen Bodenbereich 18 angeordnet. Im dargestellten Ausführungsbeispiel weist das Bolzenlagerrohr 26 einen kreisförmigen Querschnitt auf, wie sich beispielsweise aus Fig. 9b ergibt, jedoch ist die Erfindung darin nicht festgelegt. Das Bolzenlagerrohr 26 kann vielmehr auch einen nichtkreisförmigen, etwa rechteckigen, quadratischen, dreieckigen oder elliptischen Querschnitt aufweisen. Obgleich in den in den Fig. 9b und 10b dargestellten Ausführungsformen der Mittelpunkt des Bolzenlagerrohres 26 auf der Längsachse L des Zylinderbehälters angeordnet ist, sind auch andere Ausbildungen möglich. Beispielsweise kann bei einer weiteren vorteilhaften Aus- - -FIGS. 9a, b show a cylinder container 12 of a hydraulic cylinder 11 according to the invention with an outwardly curved hemispherical base region 18 (see FIG. 3), in which a bolt bearing tube 26 for a fastening bolt, not shown, penetrates the interior 19 of the cylinder container 12 in one area, which is defined (delimited) by the curved bottom region 18 of the cylinder container 12. The cylinder container 12 and the pin bearing tube 26 can be formed together in one piece (for example as a cast part). Alternatively, a two-piece design of the cylinder container 12 according to FIG. 3 is also possible, only the base piece 21 (FIG. 3) and the pin bearing tube 26 being formed in one piece as a casting. Finally, however, a further embodiment is also possible in which the cylinder container 12 or its base piece 21 (FIG. 3) is opened on both sides, so that the bolt bearing tube 26 can subsequently be passed through the cylinder container 12 as an independent component and welded to it. 9a, b, the bolt bearing tube 26 is arranged at a certain minimum distance D from the inner wall 30 of the cylinder container 12 in the bottom region 18 thereof. In the exemplary embodiment shown, the pin bearing tube 26 has a circular cross section, as can be seen, for example, from FIG. 9b, but the invention is not defined therein. Rather, the pin bearing tube 26 can also have a non-circular, approximately rectangular, square, triangular or elliptical cross section. Although in the embodiments shown in FIGS. 9b and 10b the center point of the pin bearing tube 26 is arranged on the longitudinal axis L of the cylinder container, other configurations are also possible. For example, in a further advantageous embodiment - -
führungsform der Mittelpunkt des Bolzenlagerrohres um einen Abstand zur Längsachse L seitlich versetzt angeordnet sein.the center of the bolt bearing tube can be laterally offset by a distance from the longitudinal axis L.
Alternativ zeigen die Figuren 10a, b eine Ausgestaltung des erfindungsgemäßen Hydraulikzylinders 1 1 , bei der das Bolzenlagerrohr 26 die Innenwand 30 des Zylinderbehälters 12 in dessen Bodenbereich 18 tangiert. Vorzugsweise sind im Zuge dieser Ausgestaltung zumindest das Bodenstück 21 (Fig. 3) des Zylinderbehälters 12 sowie das Bolzenlagerrohr 26 gemeinsam einstückig (z.B. als Gussteil) ausgebildet.Alternatively, FIGS. 10a, b show an embodiment of the hydraulic cylinder 11 according to the invention, in which the pin bearing tube 26 touches the inner wall 30 of the cylinder container 12 in its bottom region 18. In the course of this configuration, at least the base piece 21 (FIG. 3) of the cylinder container 12 and the pin bearing tube 26 are preferably formed in one piece (e.g. as a cast part).
Eine derartige Ausgestaltung des erfindungsgemäßen Hydraulikzylinders 1 1 ist in der Fig. 1 1 nochmals anhand einer teilweisen Schnittansicht detailliert dargestellt. Gemäß der Fig. 1 1 ist der Zylinderbehälter 12 zweistückig aus einem Zylinderrohr 20 und einem Bodenstück 21 zusammengesetzt, vorzugsweise verschweißt (Schweißnaht 22), wobei das Bodenstück 21 des Zylinderbehälters 12 zu seinem offenen Ende hin in einem Bereich 31 aus Stabilitätsgründen eine Verdickung und in einem weiteren Bereich 32 auf seiner Innenseite 27 eine Ausnehmung aufweist. Weiterhin ist das Bolzenlagerrohr 26 nach oben hin, d.h. in Richtung des Zylinderinnenraums 19 im Schnitt trapezförmig verlängert, sodass ein Anschlag 33 für den innerhalb des Zylinderbehälters 12 beweglichen Kolben 13 (Fig. 2) geschaffen ist, wobei der Anschlag 33 sich vorzugsweise auf Höhe der Ausnehmung 32 befindet. Im rechten Teil der Fig. 1 1 ist zusätzlich noch eine Gusskontur des Bodenstücks 21 vor einer Bearbeitung zum Ausbilden der Verdickung 31 bzw. der Ausnehmung 32 dargestellt.Such an embodiment of the hydraulic cylinder 11 according to the invention is shown again in detail in FIG. 11 using a partial sectional view. According to Fig. 1 1, the cylinder container 12 is composed in two parts from a cylinder tube 20 and a base piece 21, preferably welded (weld seam 22), the base piece 21 of the cylinder container 12 towards its open end in a region 31 for stability reasons a thickening and in another area 32 has a recess on its inside 27. Furthermore, the pin bearing tube 26 is upwards, i.e. Extended trapezoidally in section in the direction of the cylinder interior 19, so that a stop 33 is created for the piston 13 movable within the cylinder container 12 (FIG. 2), the stop 33 preferably being located at the level of the recess 32. In the right part of FIG. 1 1, a casting contour of the base piece 21 is additionally shown before processing to form the thickening 31 or the recess 32.
Die Figuren 12a-f zeigen eine weitere Ausgestaltung eines Bodenstücks 21 eines erfindungsgemäßen Hydraulikzylinders 1 1 (vgl. Fig. 3) im Detail anhand einer Anzahl diverser (Schnitt-)Ansichten.FIGS. 12a-f show a further embodiment of a base piece 21 of a hydraulic cylinder 11 according to the invention (cf. FIG. 3) in detail on the basis of a number of various (sectional) views.
In der Fig. 12a ist im rechten Teil der Abbildung wiederum eine Gusskontur des Bodenstücks 21 eines erfindungsgemäßen Hydraulikzylinders im Schnitt dargestellt. Im linken Teil der Fig. 12a ist eine im Wesentlichen der Fig. 1 1 entsprechen- de Ausgestaltung des Bodenstücks 21 mit angesetztem Zylinderrohr 20 nach Bearbeitung der Gusskontur (vgl. Fig. 1 1 ) gezeigt. Dabei weist das Bodenstück 21 im Scheitelbereich seiner Wölbung eine geneigt verlaufende Abflachung 34 auf, an die sich - in radialer Richtung bezüglich der Längsachse L des Bodenstücks 21 versetzt - ein Ansatz 35 mit einer Bohrung 36 anschließt. Der Ansatz 35 dient als speziell bearbeitete Planfläche zur Aufnahme eines an die Bohrung 36 anschließbaren HydraulikventilsIn FIG. 12a, a casting contour of the base piece 21 of a hydraulic cylinder according to the invention is again shown in section in the right part of the figure. In the left-hand part of FIG. 12a, one that essentially corresponds to FIG. de Design of the base piece 21 with attached cylinder tube 20 after machining the cast contour (see. Fig. 1 1) shown. In this case, the base piece 21 has an inclined flattening 34 in the apex region of its curvature, to which an attachment 35 with a bore 36 connects - offset in the radial direction with respect to the longitudinal axis L of the base piece 21. The approach 35 serves as a specially machined flat surface for receiving a hydraulic valve that can be connected to the bore 36
Die Fig. 12b zeigt einen Schnitt entlang der Linie A-A (vgl. Fig. 12d). Dieser Darstellung ist insbesondere in einem Bereich 37 des gewölbten Bodenbereichs 18 ein von außen in Richtung der Längsachse L des Bodenstücks 21 abnehmender Krümmungsradius R des gewölbten Bodenbereichs 18 zu entnehmen.Fig. 12b shows a section along the line A-A (see Fig. 12d). This illustration shows, in particular in an area 37 of the curved bottom area 18, a radius of curvature R of the curved bottom area 18 which decreases from the outside in the direction of the longitudinal axis L of the bottom piece 21.
Die Figuren 12c und 12d zeigen eine Seitenansicht bzw. eine Draufsicht des Bodenstücks 21 gemäß der Figuren 12a, b, wobei der Fig. 12d insbesondere eine annähernd parallel zu der in Draufsicht kreisförmigen Außenkontur des Bodenstücks 21 verlaufende Krümmung des als zweiteiliger Vorsprung ausgebildeten Anschlags 33 zu entnehmen ist (vgl. auch Fig. 12e).FIGS. 12c and 12d show a side view and a top view of the base piece 21 according to FIGS. 12a, b, with FIG. 12d in particular showing a curvature of the stop 33, which is designed as a two-part projection, and runs approximately parallel to the outer contour of the base piece 21, which is circular in plan view can be seen (see also Fig. 12e).
Schließlich zeigen die Figuren 12e und 12f eine Schnittansicht gemäß der Linie B- B in Fig. 12d bzw. eine Ansicht des Bodenstücks 21 von unten betrachtet (Pfeil X in Fig. 12 e).Finally, FIGS. 12e and 12f show a sectional view along the line BB in FIG. 12d and a view of the base piece 21 viewed from below (arrow X in FIG. 12e).
Wie insbesondere die Figuren 12d-f zeigen, bietet der erfindungsgemäße Ansatz mit einer Durchdringung des durch den gewölbten Bodenbereich 18 des Zylinderbehälters 12 definierten Volumens die Möglichkeit einer Variation der Augenbreite AB (Fig. 12d) gegenüber einer Breite ZB (Fig. 12d) des Zylinderbehälters 12 bis relativ weit über die letztgenannte Breite ZB hinaus, wobei der Breitenzuwachs (AB - ZB) allein durch die Biegefestigkeit der Struktur begrenzt wird. As particularly shown in FIGS. 12d-f, the approach according to the invention with a penetration of the volume defined by the curved bottom region 18 of the cylinder container 12 offers the possibility of varying the eye width AB (FIG. 12d) compared to a width ZB (FIG. 12d) of the cylinder container 12 to relatively far beyond the last-mentioned width ZB, the increase in width (AB-ZB) being limited solely by the bending strength of the structure.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0187405A AT502871B1 (en) | 2005-11-17 | 2005-11-17 | HYDRAULIKZYLINDER |
| PCT/EP2006/010350 WO2007057100A1 (en) | 2005-11-17 | 2006-10-26 | Hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1952033A1 true EP1952033A1 (en) | 2008-08-06 |
| EP1952033B1 EP1952033B1 (en) | 2012-08-01 |
Family
ID=37617997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06806573A Active EP1952033B1 (en) | 2005-11-17 | 2006-10-26 | Concrete pump vehicle |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20090090687A1 (en) |
| EP (1) | EP1952033B1 (en) |
| KR (1) | KR101339853B1 (en) |
| CN (2) | CN104314910B (en) |
| AT (1) | AT502871B1 (en) |
| AU (1) | AU2006314881B2 (en) |
| BR (1) | BRPI0619397A2 (en) |
| CA (1) | CA2629973C (en) |
| ES (1) | ES2310160T3 (en) |
| WO (1) | WO2007057100A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012215090A1 (en) * | 2012-08-24 | 2014-02-27 | Putzmeister Engineering Gmbh | Mast arm for a concrete distributor mast |
| CN103057927B (en) * | 2013-01-15 | 2015-09-09 | 湖南晨光机器制造有限公司 | A kind of hydraulic foldable conveying arm transporting sand self-unloading oceangoing ship |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191101284A (en) * | 1911-01-18 | 1911-06-15 | Lewis Robert Doran | Improvements in and connected with Hydraulic Lifting Jacks. |
| US2451089A (en) * | 1945-08-20 | 1948-10-12 | Casimir A Miketta | Hydraulic cylinder construction |
| US2655872A (en) * | 1948-11-09 | 1953-10-20 | Fairmont Railway Motors Inc | Vehicle structure |
| GB1204479A (en) * | 1966-11-14 | 1970-09-09 | Winget Ltd | Fluid operated ram assemblies |
| DE1625989A1 (en) * | 1967-08-31 | 1971-01-21 | Messerschmitt Boelkow Blohm | Double-acting, redundant hydraulic cylinder system, preferably for aircraft and space vehicles |
| AT332101B (en) * | 1969-06-10 | 1976-09-10 | Schwing Friedrich | DEVICE FOR SPREADING CONCRETE |
| JPS5313072A (en) * | 1976-07-20 | 1978-02-06 | Tokico Ltd | Method of forming gas chamber of gas enclosure type closed cylinder |
| AT347750B (en) * | 1976-11-11 | 1979-01-10 | Vmw Ranshofen Berndorf Ag | COMPRESSED AIR OR HYDRAULIC CYLINDERS |
| US4211150A (en) * | 1977-10-26 | 1980-07-08 | Abex Corporation | Air cylinder |
| JPS5569339A (en) * | 1978-11-20 | 1980-05-24 | Tokico Ltd | Gas sealed cylinder device |
| JPS6035812Y2 (en) * | 1979-11-09 | 1985-10-24 | トキコ株式会社 | gas spring |
| JPS5861310A (en) * | 1981-10-02 | 1983-04-12 | Kyokuto Kaihatsu Kogyo Co Ltd | Fluid pressure cylinder |
| JPH0249418B2 (en) * | 1983-02-10 | 1990-10-30 | Nhk Spring Co Ltd | YUATSUKANSHOKI |
| JPS60169443U (en) * | 1984-04-20 | 1985-11-09 | トキコ株式会社 | Gas-filled hydraulic shock absorber |
| US4685384A (en) * | 1984-08-20 | 1987-08-11 | Pneumo Corporation | Fluid actuator including composite cylinder assembly |
| US4729538A (en) * | 1986-11-10 | 1988-03-08 | Bergacker John W | Apparatus for hydraulically actuating a vehicle seat |
| FR2632025A1 (en) * | 1988-05-30 | 1989-12-01 | Hors Piste Plongee Sarl | Novel hydraulic thrust cylinder with high performance |
| US4878419A (en) * | 1988-06-27 | 1989-11-07 | Allied-Signal Inc. | Lightweight hydraulic actuator |
| JPH0949508A (en) * | 1995-08-08 | 1997-02-18 | Shimadzu Corp | Hydraulic cylinder device |
| DE29910970U1 (en) * | 1999-06-23 | 1999-09-02 | Festo AG & Co, 73734 Esslingen | Fluid operated cylinder |
| DE10064365B4 (en) * | 2000-12-22 | 2010-12-16 | Schwing Gmbh | Hydraulic Cylinder |
| DE10106427B4 (en) * | 2001-02-12 | 2006-06-22 | Schwing Gmbh | Distributor device for thick materials, in particular for concrete |
| US6786233B1 (en) * | 2001-02-23 | 2004-09-07 | Schwing America, Inc. | Boom utilizing composite material construction |
| DE10112086A1 (en) * | 2001-03-12 | 2002-09-26 | Putzmeister Ag | Distribution device for thick matter |
-
2005
- 2005-11-17 AT AT0187405A patent/AT502871B1/en not_active IP Right Cessation
-
2006
- 2006-10-26 CN CN201410412284.5A patent/CN104314910B/en active Active
- 2006-10-26 EP EP06806573A patent/EP1952033B1/en active Active
- 2006-10-26 CN CN200680042991.3A patent/CN101313156B/en not_active Expired - Fee Related
- 2006-10-26 US US12/093,897 patent/US20090090687A1/en not_active Abandoned
- 2006-10-26 WO PCT/EP2006/010350 patent/WO2007057100A1/en not_active Ceased
- 2006-10-26 BR BRPI0619397-8A patent/BRPI0619397A2/en not_active Application Discontinuation
- 2006-10-26 KR KR1020087014673A patent/KR101339853B1/en active Active
- 2006-10-26 ES ES06806573T patent/ES2310160T3/en active Active
- 2006-10-26 CA CA2629973A patent/CA2629973C/en not_active Expired - Fee Related
- 2006-10-26 AU AU2006314881A patent/AU2006314881B2/en not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007057100A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2629973A1 (en) | 2007-05-24 |
| BRPI0619397A2 (en) | 2011-10-04 |
| ES2310160T3 (en) | 2012-11-22 |
| AT502871B1 (en) | 2008-06-15 |
| US20090090687A1 (en) | 2009-04-09 |
| CN101313156B (en) | 2014-09-03 |
| ES2310160T1 (en) | 2009-01-01 |
| CN104314910A (en) | 2015-01-28 |
| CN101313156A (en) | 2008-11-26 |
| KR101339853B1 (en) | 2013-12-10 |
| WO2007057100A1 (en) | 2007-05-24 |
| EP1952033B1 (en) | 2012-08-01 |
| AU2006314881B2 (en) | 2011-07-14 |
| AT502871A1 (en) | 2007-06-15 |
| CA2629973C (en) | 2011-04-19 |
| CN104314910B (en) | 2017-09-19 |
| KR20080082648A (en) | 2008-09-11 |
| AU2006314881A1 (en) | 2007-05-24 |
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