EP1020396B1 - Antriebseinrichtung fur ein Arbeitswerkzeug, beispielsweise eines Greifers oder Kranes - Google Patents
Antriebseinrichtung fur ein Arbeitswerkzeug, beispielsweise eines Greifers oder Kranes Download PDFInfo
- Publication number
- EP1020396B1 EP1020396B1 EP00100249A EP00100249A EP1020396B1 EP 1020396 B1 EP1020396 B1 EP 1020396B1 EP 00100249 A EP00100249 A EP 00100249A EP 00100249 A EP00100249 A EP 00100249A EP 1020396 B1 EP1020396 B1 EP 1020396B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston rod
- chamber
- hydraulic
- torque motor
- compartmental
- 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.)
- Revoked
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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 working tool, in particular a crane or a gripper with the characteristics according to the preamble of claim 1.
- a work tool in the form of a gripper to open and closing power gripper required by gripper tongs is usually provided by a hydraulic rotary motor, which with a gripper directly actuated piston cylinder unit is connected.
- the drive device must be as small as possible.
- the gripper forces occurring, in particular impact forces not, at least not fully transferred to the rotary motor.
- U1 means for hydraulically turning and activating the working tool a crane or the like, in which the piston rod a piston-cylinder unit directly on the output side of the rotary motor is fixed, with the hydraulic connection between the rotary motor and piston-cylinder unit realized via hydraulic channels, which in the piston rod are integrated.
- the problem underlying the invention is therefore a drive device for a working tool, in particular a crane or gripper create, by means of which a low overall height of the entire drive device is realized and an introduction of particular impact forces by pressing the Working tool is avoided in the rotary motor.
- the drive device for a working tool in particular a crane, a gripper or the like, a rotary motor and a Piston-cylinder unit for actuating the working tool on.
- the piston-cylinder unit has a first and a second pressure chamber, by means of which a piston depending on the pressure prevailing between the pressure chambers pressure conditions in the piston-cylinder unit is movable, with the movement of the piston for actuating the working tool, for example for opening or closing the gripper is used.
- the piston of the piston-cylinder unit is connected via a piston rod with the rotary motor so that the rotation of the Rotary motor is transmitted to the piston rod.
- the piston rod axially movable in a hydraulic damping pad.
- the hydraulic damping pad at least provided between the rotary motor and the piston rod, in which the piston rod is axially movable. That is, the piston rod is not directly on the Rotary motor mounted and in the axial direction with respect to the rotary motor in a small Dimensions movable.
- the mobility of the piston rod is determined by the hydraulic Damping pad so absorbed that forces, in particular Shock forces transmitted by the work tool via the piston rod be absorbed by the hydraulic damping pad, that is damped become. As a result, in particular impact forces from the working tool not transferred to the rotary motor.
- the piston rod facing at its the rotary motor Side an annular flange.
- This ring flange is of a fixing ring, which is firmly connected to the output side of the rotary motor, in particular is firmly screwed, so engaged behind that the hydraulic cushioning pad the annular flange surrounds a gap, wherein the gap with a hydraulic Damping fluid is at least partially filled.
- the fastening ring the piston rod engages behind the flange by means of an inner shoulder and in this way connects the piston rod with the rotary motor is - as known in the art - an oil distribution unit between the rotary motor and working tools are not required, so that a short length of the entire Drive device is achievable.
- the short length combined with the Damping of the forces exerted by the working tool puts beyond a cost effective solution for a drive device for a work tool represents.
- the fastening ring over a between the annular flange of the piston rod and the output side of the rotary motor arranged distributor plate connected to the rotary motor, wherein the hydraulic Damping pad the ring flange on the distributor plate and on the mounting ring surrounds.
- the annular flange of the piston rod is thus through the distributor plate and the area of the annular flange which passes through the mounting ring is engaged behind, designed as a substantially circumferential gap, which with a damping hydraulic fluid is at least partially filled.
- the ring flange the piston rod is thus between distributor plate and mounting ring in embedded in the gap-shaped hydraulic damping cushion 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 realize initiated forces.
- the hydraulic damping pad divided into a first and a second gap chamber, in particular by a in the Fixing ring arranged sealing device. It is one of the splitting chambers essentially between the piston rod and the rotary motor or the Piston rod and the distributor plate and the other of the splitting chambers substantially arranged in the area in which the annular flange of the mounting ring is behind. If a distributor plate is provided, then the mounting ring laterally next to the annular flange of the piston rod on the distributor plate supported, with the mounting screws in this side area penetrate both the mounting ring and the distributor plate. Thereby is a reliable attachment from the mounting ring and distributor plate on Rotary motor ensures the connection of the piston rod with the rotary motor.
- the hydraulic damping is realized. This is in particular a shock load, which from the working tool ago results and is passed through the piston rod, not in the Torque motor initiated.
- the gap chamber is preferably with a pressure-controllable Connected valve which is controllable so that a desired damping in Dependent on the force exerted by the piston rod force is adjustable.
- the working tool is designed, for example, as a gripper
- the piston rod moves when closing the gripper, the piston rod to the rotary motor.
- From the rotary motor is via a corresponding hydraulic line hydraulic oil in pressed the second split chamber.
- This is a targeted steaming, that is achieved a targeted oil-hydraulic damping pad, which initiating prevents a shock load in the rotary motor.
- the piston rod moves away from the rotary motor in the direction of the inner shoulder of the fastening ring.
- the supply of hydraulic oil is controlled so that it over another hydraulic line passes from the rotary motor to the first gap chamber.
- the piston-cylinder unit connected to the rotary motor via hydraulic channels, which through the mounting ring passed through.
- this is a special oil distribution unit Not required because of the mounting ring as oil passage is trained.
- the piston-cylinder unit with the rotary motor via directly guided by the rotary motor in the piston rod Hydraulic lines are connected, wherein between the rotary motor outgoing hydraulic lines and integrated in the piston rod hydraulic lines provided corresponding axially movable sealed tube inserts are.
- These tube inserts ensure on the one hand the axial mobility the piston rod in the hydraulic damping pad.
- They 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 with a fastening 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 annular flange 7 on which the output side of the rotary motor 1 side facing away such that the Ring flange of a slit-shaped hydraulic damping pad 6 is surrounded.
- the rotary motor 1 feeds via hydraulic lines, which through the mounting ring 8 via arranged in the piston rod 5 hydraulic channels 13, 14 are guided, the first pressure chamber 3 and the second pressure chamber 4 of the piston-cylinder unit. 2
- the piston rod is at its flange by means of driving pins 20, which circumferentially on the output side of the rotary motor 1 facing side of the annular flange 7 are arranged, connected to the rotary motor 1, so that upon rotation of the rotary motor 1, the piston rod 5 rotates.
- the piston-cylinder unit 2 has a cylinder housing 18, a piston 17 and a stuffing box-like guide bushing 19, which the first pressure chamber 3 in the cylinder housing 18 after seals on the outside and represents a passage for the piston rod 5.
- FIG. 2 shows the exemplary embodiment of the drive device according to FIG. 1, wherein the cutting 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 annular flange. 7 is axially movable and this axial movement through the hydraulic damping pad 6 is receivable.
- like reference numerals designate identical ones Components.
- FIG. 3 is another 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 output side of the Rotary motor 1 to form a slit-shaped hydraulic damping pad 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 annular flange 7 are guided and in hydraulic operative connection with the oil pressure feed lines stand by the rotary motor 1.
- the hydraulic lines 13 and 14 are while on axially displaceable movable and sealed tube inserts 12 the transition point between the annular 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.
- This only split chamber is at least partially with a damping hydraulic fluid, for example Grease, filled, so that the annular flange 7 - depending on the direction of movement - Can move into the hydraulic damping pad 6.
- the overall structure otherwise corresponds to that of the embodiment of FIG. 1 and Second
- Fig. 4 is a further Ausfiihrungsbeispiel of a drive device according to the invention described.
- the basic structure corresponds to that in FIG. 1 and 2 described embodiment.
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)
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 EP1020396A2 (de) | 2000-07-19 |
EP1020396A3 EP1020396A3 (de) | 2004-05-12 |
EP1020396B1 true 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) |
Family Cites Families (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 |
DE29505315U1 (de) * | 1995-03-29 | 1995-06-01 | Hydraulik Techniek Emmen B.V., Emmen | 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
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 |
EP1020396A2 (de) | 2000-07-19 |
EP1020396A3 (de) | 2004-05-12 |
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