EP0897894B1 - Hubgerüst für einen Hublader - Google Patents
Hubgerüst für einen Hublader Download PDFInfo
- Publication number
- EP0897894B1 EP0897894B1 EP98115359A EP98115359A EP0897894B1 EP 0897894 B1 EP0897894 B1 EP 0897894B1 EP 98115359 A EP98115359 A EP 98115359A EP 98115359 A EP98115359 A EP 98115359A EP 0897894 B1 EP0897894 B1 EP 0897894B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mast
- lifting
- cylinder
- piston rod
- frame according
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/08—Masts; Guides; Chains
Definitions
- the invention relates to a mast for a lift truck with one on one Vehicle frame fixed mast, one relative to the mast vertical movable first mast and a vertically movable relative to the first mast second mast, with the standing mast forming the outermost part of the mast, within it the first mast is arranged and guided, and wherein the second mast within the first mast is arranged and guided, with the actuation of the vertical movable mast parts at least one lifting cylinder is provided and a first and a second lifting cylinder are arranged on the first vertically movable mast and wherein the cylinder liners of the lifting cylinders are rigidly attached to the first mast and a piston rod of the first lifting cylinder with the mast and one Piston rod of the second lifting cylinder is connected to the second mast.
- GB-A-2 176 845 is a lifting frame for one designed as a telescopic mast Lift loader with a standing mast, a first extendable mast and a second extendable mast known.
- the standing mast forms the outermost mast, inside of which the first mast is arranged and guided.
- the second mast is inside the first mast arranged and guided to the first and second mast Hydraulic cylinders provided, the cylinder liners attached to the first mast are.
- the piston rods of the hydraulic cylinders are with the mast and the second mast connected.
- Such consisting of a standing mast and two longitudinally movable mast parts Masts are commonly referred to as triplex masts.
- the standing mast forms usually an outer mast
- the first vertically movable mast one Middle mast and the second vertically movable mast an inner mast Masts are known constructions in which in the side area of the mast On each side a lifting cylinder attached to the mast is arranged, which with the Middle mast is connected.
- a lifting cylinder attached to the mast is arranged, which with the Middle mast is connected.
- To generate a lifting movement of the inner mast at least one mast lifting chain must be provided, which is on the inner mast and the Stand mast is attached and which is guided over a guide roller on the center mast.
- a free lift is provided in such a mast, in which a The inner mast is arranged in a longitudinally displaceable manner, first in its highest Is moved into position before the lifting movement of the mast parts takes place, then is a Free lift cylinder arranged on the second mast, which is connected to the Fork carriage is connected.
- a hose line is required, for example along the mast lift chain or via separate deflection rollers on the mast and on the first mast to the free lift cylinder is led.
- the present invention has for its object to have a mast improved visibility and low construction costs put.
- each mast part from Cross braces interconnected vertically arranged rails and there Cylinder liners of the lifting cylinders on the rails of the first mast within the Outlines of the standing mast and the second mast are arranged, the Piston rod of the first lifting cylinder with the lower area of the rail or the lower cross strut of the standing mast is in operative connection and the piston rod of the second lifting cylinder or the upper area of the second mast upper cross strut of the second mast is connected.
- the mast Lift cylinders there is an arrangement of two in the mast Lift cylinders, in which the piston rod of the first lift cylinder extends downwards and lifts the first and the second mast relative to the standing mast and the Piston rod of the second lifting cylinder extends upwards and the second Mast lifts relative to the first mast by arranging two lifting cylinders on the first movable mast, of which a lifting cylinder with the standing mast and a Lift cylinders are operatively connected to the second mast, are not mast lifting chains required for the second mast, since the piston rods of the lifting cylinders with the Standing mast and the second mast are in connection and thus for lifting the serve first and second mast.
- By eliminating the mast lift chains and the corresponding deflection rollers results in a low construction effort and improved visibility for the driver.
- the lifting cylinders are on the first mast within the outline of the standing mast and the second mast arranged. This will improve the visibility for the Driver continues to improve since the jacks on each side of the mast are arranged between the standing mast and the second mast and thus none. cause additional visual impairment for the driver.
- Through the arrangement of the lifting cylinders according to the invention on the central mast of the triplex mast This results in favorable visibility for the driver, since none of the field of vision of the driver restricting components on the side areas and within the Lift masts are required.
- the piston sides of the lifting cylinders communicate with each other. This is to act on both lifting cylinders only one pressure medium line to both lifting cylinders is necessary.
- the connection the piston sides of the lifting cylinders can be made, for example, by means of a line.
- the first and second lifting cylinders have the same advantage effective piston areas. When pressure medium is applied, it moves thus first the second lifting cylinder, which actuates the second mast, since this is the is subjected to less load and only the second mast, the fork carriage and must lift the load on it.
- the cylinder liners are of the first and second lifting cylinders connected together and form a Liner for both piston rods with a common interior.
- the Cylinder liners of the vertically arranged and spaced apart Piston rods of the lifting cylinder thus form a common liner, the Interiors of the cylinder liners communicate with each other and one form common interior.
- the piston rods are particularly advantageous as hollow piston rods educated. This ensures that with a common liner Piston rods are sealed against the respective cylinder liners can and a corresponding piston surface for generating a lifting force for Is made available. In addition, they are easily connected to each other standing pressure chambers of the lifting cylinders, because between the piston rods and the respective cylinder liners in the interior of the liner an annular gap is formed in the pressure medium from the piston rod of the first lifting cylinder Piston rod of the second lifting cylinder can flow. It can therefore refer to a Pressure medium line for connecting the piston sides representing the pressure chambers both piston rods can be dispensed with.
- the cylinder liners are vertical Rail of the first mast part integrated. This eliminates the connection of the Cylinder liners with the vertical rail of the first mast section.
- the Cylinder liners can also be designed as a common liner his.
- the hollow piston rod in the from Cylinder liner protruding area closed with a connector is in a hole for connecting the piston rod with a pressure medium line is provided. Since the piston rod here by means of a fastening device the connector is connected to the mast at the same time, the Pressure medium supply to the lifting cylinders in the lower area of the first lifting cylinder. A connecting line between the piston rods of the lifting cylinders is not required because pressure medium from the piston rod of the first lifting cylinder via the Connection of the piston rods with the cylinder liners and the annular gap Piston rod of the second lifting cylinder can flow. On the mast are thus in No pressure medium lines required in the driver's field of vision.
- a mast with a fork carriage that can be moved longitudinally on the second mast is provided, which is arranged by means of at least one on the second mast Free stroke cylinder is longitudinally movable, it is particularly useful if the Pressure medium supply to the free lift cylinder of the fork carriage via the second one Mast connected piston rod of the second lifting cylinder.
- This can also provided a connector on the piston rod with a bore be in connection with the pressure chamber of the free lift cylinder. This is no pressure medium line routed via deflection rollers to the free lift cylinder, since the piston rod of the second lifting cylinder is fixed relative to the second mast and thus the free lift cylinder, for example by means of a pipeline to the Connection piece of the piston rod of the second lifting cylinder can be connected can.
- the mast 1 according to FIG. 1 has an outer mast 2 which is attached to a frame 3a, 3b of a lift truck is attached.
- the standing mast 2 can an axis of rotation 4 arranged in the lower region can be designed to be tiltable.
- the Standing mast 2 consists of vertically arranged rails 2a, 2b, within which a first mast 5 is mounted and guided longitudinally.
- the first mast 5 consists of two rails 5a and 5b, within which a second one, made of two rails 6a, 6b existing second mast 6 is mounted and guided longitudinally.
- a fork carriage 7 is longitudinally displaceable arranged.
- first lifting cylinder 8 there is a first lifting cylinder 8 and one on each side of the mast 1 second lifting cylinder 9 is arranged, each on the rails 5a and 5b of the first Mastes 5 are rigidly attached.
- the lifting cylinders 8, 9 have a common one Liner 10 in which a piston rod 8a of the first lifting cylinder 8 and Piston rod 9a of the second lifting cylinder 9 is arranged.
- the bushing 10 is on the vertical rails 5a, 5b of the first mast 5 attached.
- the piston rod 8a of the lifting cylinder 8 is, for example, with a lower cross strut 11 of the Standing mast 2 in operative connection.
- the Piston rod 8a is fastened in the lower region of the rail 2a or 2b.
- the Piston rod 9a of the lifting cylinder 9 is on an upper, not shown Cross strut of the second mast 6 attached. It is also possible that the Piston rod 9a is fastened in the upper region of the rail 6a or 6b. At a lower cross strut 13 of the second mast 6 is on each side of the mast 1 Free lift cylinder 14 is provided, which by means of a chain 15 for actuating the Fork carrier 7 is provided. Instead of two free lift cylinders 14, one can also centrally located free lift cylinders can be used.
- FIG. 2 shows a longitudinal section of a first lifting cylinder 8 and a second one Lift cylinder 9, each of which in a common liner 10th exist longitudinally displaceably mounted piston rod 8a and 9a.
- the piston rods 8a, 9a have piston surfaces of the same size.
- the bushing 10 consists of two axially spaced annular cylinder liners 30, 31 which are interconnected and one form common interior 32.
- the cylinder liners 30, 31 are each for this purpose provided with a recess arranged on the circumference, which is in the axial direction of the cylinder liners 30, 31 extend.
- the Cylinder liner 31 serves to receive the first piston rod 8a and Cylinder liner 30 for receiving the second piston rod 9a.
- Between Piston rods 8a, 9a and the liner 10 are formed by the recesses in the Cylinder liners 30, 31 in the interior 32 an annular gap 33.
- the common Liner 10 can be by welding two individual cylinder liners 30, 31 are produced. It is also possible for the cylinder liner 10 to be in one piece train.
- the sleeve 10 is at the lower and upper ends with provided with a flange 20 for fastening the common liner 10 the vertical rails 5a, 5b of the first mast 5 is used.
- the flanges 20 can also be designed as the lower and upper cross strut of the first mast 5.
- the piston rods 8a, 9a are plunger pistons with a hollow piston rod 8a, 9a formed and thus have an interior 21, 22.
- the piston rod 8a protrudes in the lower area out of the flange 20 and is with a connector 23rd provided which has a bore 24 which with a pressure medium line to Supply of pressure medium can be connected.
- the connector 23 is used continue to attach the piston rod 8a to the standing mast 2.
- This is one Fastening device 26 is provided which connects the piston rod 8a the mast.
- the upper flange 20 likewise has a bore, through which the piston rod 9a protrudes.
- the piston rod 9a provided with a connector 25, which for attaching the second mast 6 the piston rod 9a is used by means of a fastening device 27.
- a bore 28 in the connector 25 is connected to the pressure chamber of the free lift cylinder and serves thus to act on the free lift cylinder 14.
- the fastening devices 26, 27 are designed as pins 29 with a threaded bore 29a.
- the pin 29 am Connector 25 is here from a corresponding hole on the vertical Rails of the second mast or the upper cross member of the second mast recorded and screwed into the threaded bore 29a Screw secured.
- the connector 23 is on the vertical Rails of the mast or the lower crossmember of the mast attached
- the piston rod 8a has a transverse bore 35 at the upper end, the one Connection of the interior 22 of the piston rod 8a with the interior 32 and thus the annular gap 33 of the sleeve 10 allows.
- the piston rod 9a is correspondingly provided with a transverse bore 36 at the lower end.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Description
- Figur 1
- einen Horizontalschnitt durch ein erfindungsgemäßes Hubgerüst,
- Figur 2
- einen Hubzylinder in einem Längsschnitt und
- Figur 3
- einen Schnitt entlang der Linie 1-1 der Figur 2.
Claims (11)
- Hubgerüst für einen Hublader mit einem an einem Fahrzeugrahmen befestigten Standmast (2), einem relativ zum Standmast (2) vertikal bewegbaren ersten Mast (5) und einem relativ zum ersten Mast (5) vertikal bewegbaren zweiten Mast (6), wobei der Standmast (2) den äußersten Mastteil bildet, innerhalb dessen der erste Mast (5) angeordnet und geführt ist, und wobei der zweite Mast (6) innerhalb des ersten Mastes (5) angeordnet und geführt ist, wobei zur Betätigung der vertikal bewegbaren Mastteile mindestens ein Hubzylinder (8; 9) vorgesehen ist und ein erster (8) und ein zweiter Hubzylinder (9) am ersten vertikal bewegbaren Mast (5) angeordnet sind und wobei die Zylinderlaufbuchsen (30, 31) der Hubzylinder (8, 9) starr am ersten Mast (5) befestigt sind und eine Kolbenstange (8a) des ersten Hubzylinders (8) mit dem Standmast (2) sowie eine Kolbenstange (9a) des zweiten Hubzylinders (9) mit dem zweiten Mast (6) verbunden ist, dadurch gekennzeichnet, dass jeder Mastteil (2; 5; 6) aus durch Querstreben (11; 12; 13) miteinander verbundenen vertikal angeordneten Schienen (2a, 2b; 5a, 5b; 6a, 6b) besteht und die Zylinderlaufbuchsen (30, 31) der Hubzylinder (8,9) an den Schienen (5a; 5b) des ersten Mastes (5) innerhalb der Umrisse des Standmastes (5) und des zweiten Mastes (6) angeordnet sind, wobei die Kolbenstange (8a) des ersten Hubzylinders (8) mit dem unteren Bereich der Schiene (2a; 2b) oder der unteren Querstrebe (11) des Standmastes (2) in Wirkverbindung steht und die Kolbenstange (9a) des zweiten Hubzylinders (9) mit dem oberen Bereich der Schiene (6a; 6b) oder der oberen Querstrebe des zweiten Mastes (6) verbunden ist.
- Hubgerüst nach Anspruch 1, dadurch gekennzeichnet, dass die Kolbenseite des ersten und des zweiten Hubzylinders (8, 9) miteinander in Verbindung stehen.
- Hubgerüst nach der Anspruch 1 oder 2, dadurch gekennzeichnet, dass die ersten und zweiten Hubzylinder (8, 9) die gleichen wirksamen Kolbenftächen aufweisen.
- Hubgerüst nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Zylinderlaufbuchsen (30, 31) des ersten und zweiten Hubzylinders (8, 9) miteinander in Verbindung stehen und eine Laufbuchse (10) für beide Kolbenstangen (8a, 9a) mit einem gemeinsamen Innenraum (32) bilden.
- Hubgerüst nach Anspruch 4, dadurch gekennzeichnet, dass die Kolbenstangen (8a; 9a) als hohle Kolbenstangen ausgebildet sind.
- Hubgerüst nach Anspruch 4 und 5, dadurch gekennzeichnet, dass der Innenraum (21; 22) der hohlen Kolbenstangen (9a; 8a) an dem in der Zylinderlaufbuchse (30; 31) befindlichen Ende eine Verbindung mit dem Innenraum (32) der Laufbuchse (10) aufweist.
- Hubgerüst nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Zylinderlaufbuchsen (30, 31) in der vertikalen Schiene (5a, 5b) des ersten Mastteil (5) integriert sind.
- Hubgerüst nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Zuführung des Druckmittels über die mit dem Standmast (2) verbundene Kolbenstange (8a) erfolgt.
- Hubgerüst nach einem der vorangegangenen Ansprüche, wobei am zweiten Mast (6) ein längsbewegbarer Gabetträger (7) vorgesehen ist, der mittels mindestens eines am zweiten Mast (6) angeordneten Freihubzylinders (14) betätigbar ist, dadurch gekennzeichnet, dass die Druckmittelzufuhr zum Freihubzylinder (14) des Gabelträgers (7) über die mit dem zweiten Mast (6) verbundene Kolbenstange (9a) erfolgt.
- Hubgerüst nach einem der Ansprüche 5 bis 9, dadurch gekennzeichnet, dass die hohlen Kolbenstangen (8a; 9a) in dem aus der Zylinderlaufbuchse (31; 30) herausragenden Bereich mit einem Anschlußstück (23; 25) verschlossen sind, wobei mindestens ein Anschlußstück (23; 25) eine Bohrung (24; 28) zur Verbindung der Kolbenstange (8a; 9a) mit einer Druckmittelleitung aufweist.
- Hubgerüst nach Anspruch 10, dadurch gekennzeichnet, dass das Anschlußstück (23; 25) eine Befestigungsvorrichtung (26; 27) aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19735804A DE19735804A1 (de) | 1997-08-18 | 1997-08-18 | Hubgerüst für einen Hublader |
DE19735804 | 1997-08-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0897894A1 EP0897894A1 (de) | 1999-02-24 |
EP0897894B1 true EP0897894B1 (de) | 2003-04-23 |
Family
ID=7839339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98115359A Expired - Lifetime EP0897894B1 (de) | 1997-08-18 | 1998-08-14 | Hubgerüst für einen Hublader |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0897894B1 (de) |
DE (2) | DE19735804A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1025120C2 (nl) | 2003-12-23 | 2005-06-27 | Actuant Corp | Telescopische hefinrichting. |
DE102011100926B4 (de) | 2011-05-09 | 2013-09-05 | Roland Hörnstein GmbH & Co. KG | Fahrzeughebebühne |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB972352A (en) * | 1962-01-19 | 1964-10-14 | Gen Engineering Company Aktieb | Improvements in or relating to lift trucks |
US3489249A (en) * | 1967-12-22 | 1970-01-13 | Crown Controls Corp | Industrial lift truck |
DE2713808A1 (de) * | 1977-03-29 | 1978-10-05 | Linde Ag | Hubgeruest fuer hublader |
GB2176845B (en) * | 1985-06-21 | 1989-04-26 | 600 Group Plc The | Improvements in telescopic devices such as crane jibs |
FR2607799A1 (fr) * | 1986-12-08 | 1988-06-10 | Haulotte Ateliers Construction | Systeme de commande du developpement et/ou de la contraction des elements d'un dispositif telescopique tel qu'une fleche de grue ou analogue |
US4721187A (en) * | 1987-03-23 | 1988-01-26 | The Raymond Corporation | Lift truck mast structure |
US4896748A (en) * | 1988-05-27 | 1990-01-30 | Caterpillar Industrial Inc. | Full free lift mast assembly |
DE4023170A1 (de) * | 1990-07-20 | 1992-01-23 | Linde Ag | Hubgeruest fuer einen hublader |
-
1997
- 1997-08-18 DE DE19735804A patent/DE19735804A1/de not_active Withdrawn
-
1998
- 1998-08-14 DE DE59808020T patent/DE59808020D1/de not_active Expired - Fee Related
- 1998-08-14 EP EP98115359A patent/EP0897894B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59808020D1 (de) | 2003-05-28 |
EP0897894A1 (de) | 1999-02-24 |
DE19735804A1 (de) | 1999-02-25 |
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