EP1674423B1 - Vorrichtung zum Bewegen eines Arbeitsgeräts - Google Patents

Vorrichtung zum Bewegen eines Arbeitsgeräts Download PDF

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Publication number
EP1674423B1
EP1674423B1 EP04425939A EP04425939A EP1674423B1 EP 1674423 B1 EP1674423 B1 EP 1674423B1 EP 04425939 A EP04425939 A EP 04425939A EP 04425939 A EP04425939 A EP 04425939A EP 1674423 B1 EP1674423 B1 EP 1674423B1
Authority
EP
European Patent Office
Prior art keywords
arm
support
fastened
axis
flexible
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.)
Not-in-force
Application number
EP04425939A
Other languages
English (en)
French (fr)
Other versions
EP1674423A1 (de
Inventor
Renato Galfre'
Massimo Vignali
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merlo Project Srl
Original Assignee
Merlo Project Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Merlo Project Srl filed Critical Merlo Project Srl
Priority to EP04425939A priority Critical patent/EP1674423B1/de
Priority to DE602004020791T priority patent/DE602004020791D1/de
Priority to AT04425939T priority patent/ATE429404T1/de
Publication of EP1674423A1 publication Critical patent/EP1674423A1/de
Application granted granted Critical
Publication of EP1674423B1 publication Critical patent/EP1674423B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B66F11/046—Working platforms suspended from booms of the telescoping type

Definitions

  • the present invention relates to a device for moving an implement, applicable for example to the end of a telescopic lifting arm.
  • the present invention was developed in particular for the purpose of providing a moving device for an aerial platform.
  • Aerial platforms are connected to the end of a lifting device, constituted for example by a telescopic lifting arm borne by a vehicle.
  • a moving device is provided between the aerial platform and the end of the telescopic lifting arm which allows to displace the aerial platform within a work area without moving the telescopic lifting arm.
  • the device according to the present invention can be used to move implements of any kind.
  • US-A-6547217 discloses a device according to the preamble of claim 1 for attachment to a boom of a lift truck to increase the range of movement of a fork carriage of the lift truck.
  • the device comprises an arm articulated at opposite ends to two supports and a chain cooperating with respective toothed wheels fixed to said supports.
  • a cylinder is articulated between the arm and a base carrying the axis of articulation of the arm.
  • US-A-6478427 and DE-U-29907704 disclose devices for moving a camera, which maintain the camera constantly levelled.
  • the object of the present invention is to provide a device that allows to move an implement along a wide action arc, even greater than 180°, and with high manoeuvring sensitivity in any point of the field of action.
  • said object is achieved by a device having the characteristics set out in the claims.
  • the reference number 10 designates a device according to the present invention for moving an implement.
  • the device 10 is used to move locally an aerial platform 12 which is connected through the device 10 to the end of a telescopic lifting arm 14 borne by a vehicle 16 illustrated only partially in Figure 1 .
  • Figures 1 through 4 illustrate the specific case of the application of the device 10 for moving an aerial platform 12, this application does not limit the field of use of the device according to the invention.
  • the device 10 can be used to move any kind of implement, in combination with a telescopic lifting arm or with a different, fixed or movable support.
  • the device 10 comprises a first support 18 and a second support 20.
  • the first support 18 is fastened to the end of the telescopic arm 14 whilst the second support 20 is fastened to the aerial platform 12.
  • the first support 18 comprises a cylindrical hub 22 which extends between two parallel walls 24 and two drums 26 fixed relative to the walls 24 and to the hub 22 and positioned externally relative to the walls 24.
  • the drums 26 are provided with respective cylindrical winding surfaces 28 each of which is formed by a cylindrical race, coaxial relative to the axis 30 of the hub 22.
  • the second support 20 is similar to the first support 18 and comprises a hub 32 positioned between two parallel walls 34 and two drums 36 fixed relative to the walls 34 and to the hub 32 and having respective cylindrical winding surfaces 38, coaxial relative to the axis 40 of the hub 32.
  • the second support 20 further comprises a cylindrical body 42 fixed between the walls 34, serving to fasten the support 20 to the implement to be moved, constituted by the aerial platform 12 in the example of Figures 1 through 4 .
  • the device 10 comprises an arm 44 with fixed length constituted for example by a metallic tubular element with quadrangular section.
  • the arm 44 is rotatably connected to the first support 18 around the axis 30 and to the second support 20 around the axis 40.
  • the arm 44 has at its two ends two semi-cylindrical seats 46, 48 coupled respectively with the hub 22 and with the hub 32.
  • To the second end of the arm 44 is fastened a respective arched flange 50, 52 with a semi-cylindrical seat complementary to the seat 46, 48.
  • Preferably, between the hubs 22, 32 and the surfaces 46, 48 of the arm 44 and of the flanges 50, 52 are interposed bushings (not illustrated) made of bronze or similar material with low friction coefficient.
  • the device 10 comprises two flexible elements 54 each of which is wound on a segment of the cylindrical winding surfaces 28, 38 of the drums 26, 36, integral with the respective supports 18, 20.
  • each flexible element 54 comprises a first chain segment 56 co-operating with the winding surface 28 and a second chain segment 58 co-operating with the winding surface 38.
  • One point of the chain segment 56 is fastened to a point of the winding surface 28 by means of a fastening block designated with the number 50 in Figure 7 .
  • one point of the chain segment 58 is fastened to a point of the unwinding surface 38 by means of a block designated by the number 62 in Figures 5 and 7 .
  • the fastening of the two points of the chain segments 56, 58 to the respective winding surfaces 28, 38 leaves freedom of winding and unwinding of the chain segments 56, 58 on the winding surfaces 28, 38 in all other points.
  • each flexible element 54 The two chain segments 56, 58 of each flexible element 54 are mutually connected in such a way that each flexible element 54 is closed in a loop.
  • the connection of the chain segments 56, 58 can be achieved by means of non flexible elements along a part of the two rectilinear branches which extend between the drums 26, 36.
  • the lower branch of each flexible element 54 comprises a non flexible metallic rod 64 at whose ends are fastened respective ends of the chain segments 54, 56.
  • the upper branch of each flexible element 54 comprises a non flexible and non extensible connection between the corresponding ends of the chain segments 56, 58 obtained in the way which shall be described below.
  • the device 10 comprises an actuator positioned in such a way as to actuate the rotation of the arm 44 relative to one of the two supports 18, 20 around the axis of rotation 30 or 40.
  • An advantageous arrangement of said actuator shall be described below.
  • the present invention is not limited to the use of an actuator arranged as described below.
  • the actuator which commands the rotation of the arm 44 is a linear actuator 66, preferably constituted by a telescopic hydraulic cylinder, positioned with its own axis parallel to the axis of the arm 44.
  • the actuator 66 comprises a body 68 and a stem 70, one of which is fastened to the arm 44 and the other one is fastened to the flexible elements 54.
  • one end of the stem 70 is fastened to a block 72 fastened on an external surface of the arm 44.
  • To the body 68 of the hydraulic cylinder 66 are fastened two flanges 74, 76.
  • One end of each chain segment 56 is fastened to the first flange 74 and one end of each chain segment 58 is fastened to the second flange 76.
  • the distance between the flanges 74, 76 is fixed and invariable so that from the operative viewpoint it is as if the ends of the two chain segments 56, 58 were fastened directly to each other and to the body 68.
  • the illustrated arrangement is such that, by varying the extension of the hydraulic cylinder 66, a rotation of the arm 44 around the axis 30 of the support 18 is commanded.
  • a rotation of the second support 20 relative to the arm 44 around the axis 40 is simultaneously obtained.
  • the rotation of the second support 20 relative to the arm 44 has an equal amplitude and an opposite direction to the rotation of the arm 44 relative to the first support 18.
  • the device 10 allows to move the implement fastened to the second support 20 maintaining said implement constantly parallel to itself. This characteristic is particularly advantageous in the case of an aerial platform 12.
  • the device 10 allows to move the platform as shown schematically in Figures 1 through 4 without moving the telescopic arm 14 and maintaining the platform with its own base surface constantly horizontal.
  • the device 10 according to the present invention allows to obtain angles of rotation of the arm 44 even exceeding 180°.
  • a great advantage is the linearity of manoeuvre due to the fact that the torque applied by the cylinder 10 to the arm 44 is constant, regardless of the angular position of the arm 44. This allows to obtain an extreme manoeuvrability and considerable sensitivity of displacement in any position of the arm, even when the arm operates in the vicinity of its end of travel positions.
  • the ratio between the angular velocity of the arm 44 and the linear velocity of the actuator 66 remains constant in every operative position.
  • An additional advantageous aspect of the present invention consists of the possibility of anchoring the flexible hoses for carrying oil, water, electrical signals, etc. to the implement 12 directly to the transmission members 54. More specifically, the flexible hoses can be fastened to brackets directly connected to the two adjustable tie rods 64 constituted by steel round rods.
  • This arrangement enables to solve a considerable problem present on all machines provided with flexible hoses, which in the presence of relative motions between different parts of the structures typically generate disorder and critical points for the emergence of wear phenomena or of localised ruptures. If the flexible hoses are anchored in the points in which the chains 58 are anchored to the support drums 26, 36, a path with constant length to pass from the machine to the basket will be obtained. Moreover, the movement of the flexible hoses will be a simple winding-unwinding on "ideal" drums with a diameter equal to that of the support drums 26, 36 of the chains 58.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Manipulator (AREA)
  • Jib Cranes (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (7)

  1. Vorrichtung zum Bewegen eines Arbeitsgerätes, welche enthält:
    einen ersten und einen zweiten Träger (18, 20),
    einen Ausleger (44), welcher eine Längsachse hat, welcher in Relation zu dem ersten Träger (18) um eine erste Achse (30) drehbar und in Relation zu dem zweiten Träger (20) um eine zweite Achse (40), welche parallel zur ersten Achse (30) ist, drehbar befestigt ist,
    zumindest ein flexibles Element (54), welches an dem ersten und an dem zweiten Träger (18, 20) befestigt ist und mit einer ersten und mit einer zweiten Abrolloberfläche (28, 38), welche jeweils mit dem ersten und mit dem zweiten Träger (18, 20) einstückig sind, zusammenwirkt, und
    ein lineares Stellglied (66), welches derart positioniert ist, um eine Umdrehung des Auslegers (44) in Relation zu einem von den Trägern (18, 20) anzuordnen,
    dadurch gekennzeichnet, dass das Stellglied (66) mit seiner eigenen Achse parallel zu der Längsachse von dem Ausleger (44) positioniert ist und zwischen dem Ausleger (44) und dem flexiblen Element (54) wirkt.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass jeder von den Trägern (18, 20) zwei Trommeln (26, 36) enthält, welche mit jeweiligen Abrolloberflächen (28, 38) bereitgestellt sind, welche mit jeweiligen flexiblen Elementen (54) zusammenwirken.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass jedes von den flexiblen Elementen (54) zwei Kettensegmente (56, 58) enthält, wobei jedes davon an einem Punkt mit einer jeweiligen Abrolloberfläche (28, 38) befestigt ist.
  4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass jeder von den Trägern (18, 20) eine jeweilige zylindrische Büchse (22, 32) koaxial zu der jeweiligen Abrolloberfläche (28, 38) enthält.
  5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das teleskopische lineare Stellglied (66) zwei Elemente (68, 70) enthält, welche in Relation zueinander teleskopartig verschiebbar sind, wobei ein erstes davon (70) mit dem Ausleger (44) verbunden ist und ein zweites davon (68) mit dem flexiblen Element (54) verbunden ist.
  6. Fahrzeug mit einem teleskopischen Hebe-Ausleger (14), welcher eine Freiluft-Plattform (12) lagert, dadurch gekennzeichnet, dass es eine Vorrichtung nach einem der vorherigen Ansprüche enthält, welche zwischen dem teleskopischen Hebe-Ausleger (14) und der Freiluft-Plattform (12) zwischengesetzt ist.
  7. Fahrzeug nach Anspruch 6, dadurch gekennzeichnet, dass es flexible Schläuche zum Befördern des Arbeitsgerätes (12) enthält, welche direkt an den flexiblen Elementen (54) verankert sind.
EP04425939A 2004-12-22 2004-12-22 Vorrichtung zum Bewegen eines Arbeitsgeräts Not-in-force EP1674423B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04425939A EP1674423B1 (de) 2004-12-22 2004-12-22 Vorrichtung zum Bewegen eines Arbeitsgeräts
DE602004020791T DE602004020791D1 (de) 2004-12-22 2004-12-22 Vorrichtung zum Bewegen eines Arbeitsgeräts
AT04425939T ATE429404T1 (de) 2004-12-22 2004-12-22 Vorrichtung zum bewegen eines arbeitsgeräts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425939A EP1674423B1 (de) 2004-12-22 2004-12-22 Vorrichtung zum Bewegen eines Arbeitsgeräts

Publications (2)

Publication Number Publication Date
EP1674423A1 EP1674423A1 (de) 2006-06-28
EP1674423B1 true EP1674423B1 (de) 2009-04-22

Family

ID=34932950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425939A Not-in-force EP1674423B1 (de) 2004-12-22 2004-12-22 Vorrichtung zum Bewegen eines Arbeitsgeräts

Country Status (3)

Country Link
EP (1) EP1674423B1 (de)
AT (1) ATE429404T1 (de)
DE (1) DE602004020791D1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108726453B (zh) * 2018-05-30 2019-10-18 常州信息职业技术学院 一种用于高空升降作业车的顶部操作平台

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6478427B1 (en) * 1999-04-02 2002-11-12 Autocue, Inc. Crane for a camera
DE29907704U1 (de) * 1999-04-30 1999-11-25 Bichlmeier, Klaus, 85521 Ottobrunn Kamera-Anstellwinkel-Mechanik
US6547217B1 (en) * 2000-09-13 2003-04-15 Pcc Superior Fabrication Variable reach lift arm

Also Published As

Publication number Publication date
DE602004020791D1 (de) 2009-06-04
EP1674423A1 (de) 2006-06-28
ATE429404T1 (de) 2009-05-15

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