EP1020396A2 - Antriebseinrichtung fur ein Arbeitswerkzeug, beispielsweise eines Greifers oder Kranes - Google Patents
Antriebseinrichtung fur ein Arbeitswerkzeug, beispielsweise eines Greifers oder Kranes Download PDFInfo
- Publication number
- EP1020396A2 EP1020396A2 EP00100249A EP00100249A EP1020396A2 EP 1020396 A2 EP1020396 A2 EP 1020396A2 EP 00100249 A EP00100249 A EP 00100249A EP 00100249 A EP00100249 A EP 00100249A EP 1020396 A2 EP1020396 A2 EP 1020396A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston rod
- rotary motor
- hydraulic
- drive device
- piston
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
- B66C3/14—Grabs opened or closed by driving motors thereon
- B66C3/16—Grabs opened or closed by driving motors thereon by fluid motors
Definitions
- the invention relates to a drive device for a work tool, in particular a crane or a gripper with the features according to the generic term of claim 1.
- a work tool in the form of a gripper for opening and closing gripper pliers usually requires drive energy provided by a hydraulic rotary motor, which with a gripper directly actuating piston cylinder unit is connected.
- the drive device must be as small as possible for reasons of space, on the other hand, it is necessary that the For example, the gripper, occurring forces, especially impact forces not, at least not to be transferred in full to the rotary motor.
- DE 297 149 83 U1 a device for hydraulic turning and activating the work tool of a crane or the like in which the piston rod a piston-cylinder unit directly on the output side of the rotary motor is attached, the hydraulic connection between the rotary motor and piston-cylinder unit is realized via hydraulic channels, which are in the piston rod are integrated.
- the fact that the piston rod of the piston-cylinder unit at the known drive device attached directly to the output side of the rotary motor is, in particular, the impact forces of the working tool, which are, for example occur when opening and closing a gripper, directly in the Rotary motor initiated, which is disadvantageous for its life, among other things.
- the problem underlying the invention is therefore a drive device for a work tool, especially a crane or gripper create, by means of which a low overall height of the entire drive device is realized and initiation of shock forces in particular by pressing the Working tool in the rotary motor is avoided.
- the drive device for a work tool has in particular a crane, a gripper or the like, a rotary motor and one Piston-cylinder unit for operating the work tool.
- the piston-cylinder unit has a first and a second pressure chamber, by means of which a piston depending on the pressure conditions prevailing between the pressure chambers is movable in the piston-cylinder unit, the movement the piston for actuating the work tool, for example for opening or closing the gripper.
- the piston of the piston-cylinder unit is connected to the rotary motor via a piston rod so that the rotation of the Rotary motor is transferred to the piston rod.
- the piston rod axially movable in a hydraulic cushioning pad.
- the hydraulic cushioning pad is, at least provided between the rotary motor and the piston rod in which the piston rod is axially movable. That means the piston rod is not directly on that Rotary motor attached and slightly in the axial direction with respect to the rotary motor Movable dimensions.
- the mobility of the piston rod is determined by the hydraulic Damping pads added such that forces, in particular Impact forces, which are transmitted from the working tool to the piston rod are absorbed by the hydraulic cushioning pad, that is damped become. As a result, impact forces from the working tool in particular not transferred to the rotary motor.
- the piston rod has on its side facing the rotary motor Side of a ring flange.
- This ring flange is from a mounting ring, which is firmly connected to the output side of the rotary motor, in particular is screwed tightly, gripped in such a way that the hydraulic cushioning pad surrounds the annular flange in the form of a gap, the gap being hydraulic Damping fluid is at least partially filled.
- the fact that the mounting ring the piston rod engages behind the flange using an inner shoulder and connecting the piston rod to the rotary motor in this way is - as is known in the prior art - an oil distributor unit between the rotary motor and working tools are not required, so that a short overall length Drive device can be achieved.
- the short overall length in connection with the Damping of the forces exerted by the work tool also provides an inexpensive solution for a drive device for a work tool represents.
- the mounting ring is the ring flange of the piston rod completely on the side opposite the output side of the rotary motor engages behind, that is sealingly brought up to the direct piston rod is, the fastening ring on its inner end faces, which the are directly facing the piston rod and there also the sealing function ensure additional axial guidance of the piston rod. Therefore can the lateral support of the piston in the cylinder also with respect to the overall length be made shorter, so that this also shortens the overall length the entire drive device can be realized.
- the fastening ring is over a between the ring flange of the piston rod and the driven side of the rotary motor arranged distributor plate connected to the rotary motor, the hydraulic Damping pads the ring flange on the distributor plate and on the fastening ring surrounds.
- the ring flange of the piston rod is thus through the distributor plate and the area of the ring flange, which through the mounting ring is formed as an essentially circumferential gap, which with a damping hydraulic fluid is at least partially filled.
- the ring flange the piston rod is between the distributor plate and the mounting ring embedded in the gap-shaped hydraulic damping pad and axially movable in it. This makes it possible to have a damping function of both in the direction of the rotary motor as well as in the opposite direction to implement initiated forces.
- the hydraulic cushioning pad divided into a first and a second gap chamber, in particular by a Fastening ring arranged sealing device.
- a Fastening ring arranged sealing device is one of the gap chambers essentially between the piston rod and the rotary motor or the Piston rod and the distributor plate and the other of the gap chambers essentially arranged in the area in which the ring flange of the fastening ring is attacked.
- a distributor plate is provided, the mounting ring to the side of the ring flange of the piston rod on the distributor plate supported, with the fastening screws in this side area penetrate both the mounting ring and the distributor plate. Thereby is a reliable fastening of the fastening ring and distributor plate on Guaranteed rotary motor for connecting the piston rod to the rotary motor.
- the first and the second gap chamber are from Rotary motor fed with hydraulic fluid and are hydraulic with a first Pressure chamber or with a second pressure chamber of the piston-cylinder unit connected in such a way that always the gap chamber with the respective pressure chamber is connected, in which the axial movement of the piston rod as a result the actuation of the work tool is directed so that a pressure equalization between the respective pressure chamber and the respective gap chamber.
- the hydraulic damping is realized. This is particularly a shock load from the work tool results and is forwarded via the piston rod, no longer in the Rotary motor initiated.
- the gap is preferably with a damping hydraulic fluid, especially grease at least partially filled.
- Controllable damping To achieve, the gap chamber is preferably with a pressure-controllable Valve connected, which is controllable so that a desired damping in Depending on the force exerted by the piston rod is adjustable.
- the piston rod moves towards the rotary motor when the gripper closes.
- Hydraulic oil is drawn in from the rotary motor via a corresponding hydraulic line pressed the second gap chamber.
- This is a targeted steaming, that is a targeted oil-hydraulic damping cushion is reached, which initiates prevents a sudden load in the rotary motor.
- the piston rod moves away from the rotary motor towards the inner shoulder the mounting ring.
- the supply of hydraulic oil is controlled so that it is over Another hydraulic line from the rotary motor reaches the first gap chamber. As a result, the desired is in the area of the ring shoulder of the fastening ring Damping of the forces introduced is achieved. Because of this controlled oil supply a pressure equalization between the first and second pressure chamber of the piston-cylinder unit and the respective gap chamber.
- the piston-cylinder unit connected to the rotary motor via hydraulic channels, which are through the mounting ring are passed through.
- this is a special oil distribution unit not required because the fastening ring acts as an oil feed-through device is trained.
- the piston-cylinder unit with the rotary motor via directly from the rotary motor into the piston rod Hydraulic lines are connected, between those of the rotary motor outgoing hydraulic lines and the hydraulic lines integrated in the piston rod corresponding axially movable sealed pipe inserts are provided are.
- these tube inserts ensure axial mobility the piston rod in the hydraulic cushioning pad.
- it sealed so that a reliable transmission of hydraulic oil from Rotary motor can be done in the piston-cylinder unit.
- FIG. 1 is a sectional view through a drive device according to a first Embodiment shown.
- Rotary motor 1 shown in the upper part.
- a piston-cylinder unit 2 with a first pressure chamber 3 and a second pressure chamber 4 is by means of a piston rod 5 a mounting ring 8 on an annular flange 7 of the piston rod 5 with the Rotary motor 1 connected.
- the fastening ring 8 engages behind the ring flange 7 on the side facing away from the driven side of the rotary motor 1 such that the Ring flange from a gap-shaped hydraulic damping cushion 6 is surrounded.
- the rotary motor 1 feeds via hydraulic lines, which through the fastening ring 8 via hydraulic channels arranged in the piston rod 5 13, 14 are guided, the first pressure chamber 3 and the second pressure chamber 4 of the piston-cylinder unit 2.
- the piston-cylinder unit 2 is connected to a gripper, for example is, when the gripper closes, the piston rod 5 moves to the driven side of the rotary motor 1.
- the hydraulic line 11, which is guided through the fastening ring 8, via the hydraulic line 13 and via the hydraulic line 22 hydraulic oil into the first gap chamber 9 pressed, whereby the corresponding damping effect is achieved and preventing an impact force exerted by the gripper from being directed toward is not introduced into the rotary motor 1 in this.
- the piston rod 5 moves at Opening the gripper, the piston rod 5 away from the rotary motor 1.
- the piston rod is on its flange by means of driver pins 20, which are circumferential on the output side of the rotary motor 1 facing the side of the ring flange 7 are arranged, connected to the rotary motor 1, so that when rotating of the rotary motor 1, the piston rod 5 also rotates.
- the piston-cylinder unit 2 has a cylinder housing 18, a piston 17 and a gland-like guide bush 19, which follows the first pressure chamber 3 in the cylinder housing 18 seals outside and represents a passage for the piston rod 5.
- FIG. 2 shows the exemplary embodiment of the drive device according to FIG. 1, the section plane is laid by the screws 23, by means of which the mounting ring 8 the piston rod of the piston-cylinder unit 2 with the Rotary motor 1 connects such that the piston rod 5 with its ring flange 7 is axially movable and this axial movement through the hydraulic cushioning pad 6 is recordable.
- the same reference numbers designate identical ones Components.
- FIG. 3 shows a further exemplary embodiment of the drive device according to the invention shown.
- the basic arrangement of the components or the connection the piston rod 5 of the piston-cylinder unit 2 with the driven side of the Rotary motor 1 with the formation of a gap-shaped hydraulic damping cushion 6 corresponds to that described in FIGS. 1 and 2.
- the difference to the embodiment of FIG. 1 is that the hydraulic lines 13 and 14 through the piston rod 5, completely through the ring flange 7 are passed and in hydraulic operative connection with the oil pressure feed lines stand by the rotary motor 1.
- the hydraulic lines 13 and 14 are thereby via axially displaceable and sealed pipe inserts 12 the transition point between the ring flange 7 of the piston rod 5 and the Output side of the rotary motor 1 connected to hydraulic channels in the rotary motor 1.
- these movable pipe inserts 12 With an axial displacement of the piston rod 5 as a result of movement or actuation of the working tool, these movable pipe inserts 12 also guide the axial movement of the piston rod 5 with off while sealing, so that the hydraulic lines 13 and 14 at this point opposite the hydraulic damping pads 6 are sealed.
- This only gap chamber is at least partially with a damping hydraulic fluid, for example Grease, filled, so that the ring flange 7 - depending on the direction of movement - Can move into the hydraulic cushion 6.
- the overall structure otherwise corresponds to that of the exemplary embodiment according to FIGS. 1 and 2nd
- FIG. 4 shows a further exemplary embodiment of a drive device according to the invention described.
- the piston-cylinder unit 2 with its piston rod 5 with the driven side or the driven flange of the rotary motor 1 indirectly connected because between the output flange of the Rotary motor 1 and the mounting ring 8, which the ring flange 7 of the piston rod 5 engages behind a distributor plate 16 is provided so that the hydraulic Damping pad 6 between the distributor plate 16 and that of the driven side of the rotary motor 1 facing side of the ring flange 7 of the piston rod 5 on the one hand and in the inner shoulder area of the fastening ring 8 on the other hand is arranged in the area in which the fastening ring 8 the ring flange 7 engages behind.
- the basic structure corresponds to that in FIG. 1 and 2 embodiment described.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Actuator (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Automatic Tool Replacement In Machine Tools (AREA)
Abstract
Description
- Fig. 1
- eine Schnittansicht der Antriebseinrichtung gemäß einem ersten Ausführungsbeispiel;
- Fig. 2
- eine Schnittansicht des Ausführungsbeispiels gemäß Fig. 1, bei welchem die Schnittebene durch den Bereich der Befestigungsschrauben gelegt ist;
- Fig. 3
- eine Schnittansicht durch eine Antriebseinrichtung gemäß einem weiteren Ausführungsbeispiel; und
- Fig. 4
- eine Schnittansicht durch eine Antriebseinrichtung gemäß noch einem weiteren Ausführungsbeispiel.
Claims (11)
- Antriebseinrichtung für ein Arbeitswerkzeug, insbesondere eines Krans oder Greifers, welche einen Drehmotor (1) und eine Kolben-Zylinder-Einheit (2) mit einer ersten Druckkammer (3) und einer zweiten Druckkammer (4) zum Betätigen des Arbeitswerkzeuges aufweist, wobei die Kolben-Zylinder-Einheit (2) mit ihrer Kolbenstange (5) mit dem Drehmotor (1) verbunden ist,
dadurch gekennzeichnet, daß
die Kolbenstange (5) in ein hydraulisches Dämpfungspolster (6) axial beweglich ist. - Antriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das hydraulische Dämpfungspolster (6) zumindest zwischen dem Drehmotor (1) und der Kolbenstange (5) vorgesehen ist.
- Antriebseinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das hydraulische Dämpfungspolster (6) zwischen einem Verteilerteller (16) und der Kolbenstange (5) vorgesehen ist.
- Antriebseinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Kolbenstange (5) an ihrer dem Drehmotor (1) zugewandten Seite einen Ringflansch (7) aufweist, welcher von einem mit der Abtriebsseite des Drehmotors (1) fest verbundenen Befestigungsring (8) derart hintergriffen ist, daß das hydraulische Dämpfungspolster (6) den Ringflansch (7) spaltförmig umgibt.
- Antriebseinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Befestigungsring (8) über den zwischen dem Ringflansch (7) der Kolbenstange (5) und der Abtriebsseite des Drehmotors (1) angeordneten Verteilerteller (16) mit dem Drehmotor (1) verbunden ist, wobei das hydraulische Dämpfungspolster (6) den Ringflansch (7) am Verteilerteller (16) und am Befestigungsring (8) umgibt.
- Antriebseinrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß das hydraulische Dämpfungspolster (6) in eine erste Spaltkammer (9) und eine zweite Spaltkammer (10) unterteilt ist, wobei die erste Spaltkammer im wesentlichen zwischen der Kolbenstange (5) und dem Drehmotor (1) und die zweite Spaltkammer (10) im wesentlichen in dem Bereich angeordnet ist, in welchem der Ringflansch (7) vom Befestigungsring (8) hintergriffen ist.
- Antriebseinrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die erste Spaltkammer (9) und die zweite Spaltkammer (10), vom Drehmotor (1) gespeist, hydraulisch mit einer ersten Druckkammer (3) oder mit einer zweiten Druckkammer (4) der Kolben-Zylinder-Einheit (2) derart verbunden ist, daß immer diejenige Spaltkammer (9 bzw. 10) mit derjenigen Druckkammer (3 bzw. 4) verbunden ist, in welche die axiale Bewegung der Kolbenstange (5) infolge der Betätigung des Arbeitswerkzeuges gerichtet ist, wobei ein Druckausgleich zwischen jeweiliger Druckkammer (3; 4) und jeweiliger Spaltkammer (9; 10) erfolgt.
- Antriebseinrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das hydraulische Dämpfungspolster (6) den Ringflansch (7) in Form einer einzigen Spaltkammer (15) umgibt, welche mit einem Hydraulikmedium zumindest teilweise gefüllt ist.
- Antriebseinrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Spaltkammer (15) mit einem Druck-regelbaren Ventil verbunden ist, welches so steuerbar ist, daß eine gewünschte Dämpfung in Abhängigkeit von der durch die Kolbenstange (5) ausgeübten Kraft einstellbar ist.
- Antriebseinrichtung nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, daß die Kolben-Zylinder-Einheit (2) mit dem Drehmotor (1) über Hydraulikkanäle (11) durch den Befestigungsring (8) hydraulisch verbunden sind.
- Antriebseinrichtung nach einem der Ansprüche 2 bis 8, dadurch gekennzeichnet, daß die die Kolbenstange (5) durchlaufenden Hydraulikkanäle (13; 14) über axial bewegliche, abgedichtete Rohreinsätze (12) mit Hydraulikkanälen des Drehmotors (1) verbunden sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19901779A DE19901779B4 (de) | 1999-01-18 | 1999-01-18 | Antriebseinrichtung für ein Arbeitswerkzeug, beispielsweise eines Greifers oder Kranes |
DE19901779 | 1999-01-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1020396A2 true EP1020396A2 (de) | 2000-07-19 |
EP1020396A3 EP1020396A3 (de) | 2004-05-12 |
EP1020396B1 EP1020396B1 (de) | 2005-08-24 |
Family
ID=7894620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00100249A Revoked EP1020396B1 (de) | 1999-01-18 | 2000-01-18 | Antriebseinrichtung fur ein Arbeitswerkzeug, beispielsweise eines Greifers oder Kranes |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1020396B1 (de) |
AT (1) | ATE302733T1 (de) |
DE (2) | DE19901779B4 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2418307A1 (fr) * | 1978-02-24 | 1979-09-21 | Poclain Hydraulics Sa | Dispositif de montage a rotation d'un organe d'outil a fluide sous pression tel qu'une benne preneuse |
EP0735276A1 (de) * | 1995-03-29 | 1996-10-02 | Hydraulik Techniek Emmen B.V. | Dreh-Hub-Vorrichtung |
DE29714983U1 (de) * | 1997-08-21 | 1997-10-16 | Atlas Weyhausen GmbH, 27751 Delmenhorst | Einrichtung zum hydraulischen Drehen und Aktivieren des Arbeitswerkzeuges eines Krans o.dgl. |
-
1999
- 1999-01-18 DE DE19901779A patent/DE19901779B4/de not_active Expired - Fee Related
-
2000
- 2000-01-18 EP EP00100249A patent/EP1020396B1/de not_active Revoked
- 2000-01-18 DE DE50010999T patent/DE50010999D1/de not_active Expired - Fee Related
- 2000-01-18 AT AT00100249T patent/ATE302733T1/de not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2418307A1 (fr) * | 1978-02-24 | 1979-09-21 | Poclain Hydraulics Sa | Dispositif de montage a rotation d'un organe d'outil a fluide sous pression tel qu'une benne preneuse |
EP0735276A1 (de) * | 1995-03-29 | 1996-10-02 | Hydraulik Techniek Emmen B.V. | Dreh-Hub-Vorrichtung |
DE29714983U1 (de) * | 1997-08-21 | 1997-10-16 | Atlas Weyhausen GmbH, 27751 Delmenhorst | Einrichtung zum hydraulischen Drehen und Aktivieren des Arbeitswerkzeuges eines Krans o.dgl. |
Also Published As
Publication number | Publication date |
---|---|
DE19901779B4 (de) | 2004-04-29 |
DE50010999D1 (de) | 2005-09-29 |
ATE302733T1 (de) | 2005-09-15 |
DE19901779A1 (de) | 2000-08-10 |
EP1020396A3 (de) | 2004-05-12 |
EP1020396B1 (de) | 2005-08-24 |
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