EP0802151A1 - Flèche pour un appareil de levage - Google Patents

Flèche pour un appareil de levage Download PDF

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Publication number
EP0802151A1
EP0802151A1 EP97104014A EP97104014A EP0802151A1 EP 0802151 A1 EP0802151 A1 EP 0802151A1 EP 97104014 A EP97104014 A EP 97104014A EP 97104014 A EP97104014 A EP 97104014A EP 0802151 A1 EP0802151 A1 EP 0802151A1
Authority
EP
European Patent Office
Prior art keywords
arm
joint
load
outer part
push rod
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
Application number
EP97104014A
Other languages
German (de)
English (en)
Other versions
EP0802151B1 (fr
Inventor
Robert Dr. Kühn
Wolfgang A. Bittenbinder
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.)
Demag Cranes and Components GmbH
Original Assignee
Zasche Fordertechnik GmbH
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 Zasche Fordertechnik GmbH filed Critical Zasche Fordertechnik GmbH
Publication of EP0802151A1 publication Critical patent/EP0802151A1/fr
Application granted granted Critical
Publication of EP0802151B1 publication Critical patent/EP0802151B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/005—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with balanced jib, e.g. pantograph arrangement, the jib being moved manually
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/02—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with non-adjustable and non-inclinable jibs mounted solely for slewing movements
    • B66C23/022—Pivot axis common with column
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/04—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs the effective length of which is variable in operation, e.g. longitudinally displaceable, extensible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs

Definitions

  • the invention relates to a boom for a lifting device, which is formed from an inner part arm, which is pivotally mounted at one end about a vertical pivot pin, and the other is connected by means of a joint with a vertical pivot axis to an outer part arm, which - at its free end - directly , or with the interposition of other components - carries a load suspension device.
  • Such booms are often used in small lifting devices, especially in hand-operated manipulators. Because the outer arm can be pivoted by almost 360 ° around the joint that connects it to the inner arm, the load suspension device covers a very large area in this embodiment.
  • a brake which is always active has been provided on the joint which connects the two partial arms. In this way, the automatic wandering of the load can be avoided, but additional effort is required when moving the load back from the angled to the extended position in order to overcome the braking force.
  • the brake is, for example, in that the operator holds a handle for moving the load, in the manner of a Dead man circuit switched off so that the braking force does not have to be overcome when moving the load. On the other hand, if the operator lets go of the handle, the brake is automatically switched on and the load is held securely in its respective position. Compared to the previously described embodiment, this is advantageous, but the disadvantage remains that when the load is moved from the angled to the extended position, this - like in the other described embodiments - must be moved from a low to a higher position by additional force .
  • the invention has for its object to avoid the disadvantages described and to create a solution with the least design effort, in which the load remains in any position of the outer arm and can also be moved from any position of the outer arm with a constant low force.
  • parts of the inner partial arm or of the joint are designed so resiliently in a plane that contains the bearing journal and the joint that a deviation of the pivot axis of the joint results from the action of a load carried by the load-carrying means the vertical results, which corresponds at least approximately to the deviation of this pivot axis from the vertical, which results as a result of the torsional deformation of the inner partial arm when it is at an angle of 90 ° to the outer partial arm.
  • the elastic compliance in such a way that, under the action of a load, it allows the joint axis to deviate from the vertical to the same extent as the torsional deformation of the inner arm caused by the same load.
  • the joint connecting the two partial arms has two pivot bearings arranged at an axial distance from one another, which have at least one outer part surrounding a pin, at least the outer part of the one pivot bearing being mounted in an elongated hole in a housing surrounding it is, and wherein the elongated hole extends in the direction of the longitudinal axis of the inner arm and corresponds in the transverse direction to the outer dimension of the outer part, while it exceeds this in the longitudinal direction and wherein the cavity between the outer part and the elongated hole is filled with an elastically resilient material.
  • This design provides the possibility that in the extended position of the two arms under the action of a load, the outer part moves with elastic deformation of the resilient material used in the elongated hole, whereby the longitudinal axis of the joint has an inclination to the Experienced vertical. With correct dimensioning and design of the resilient material, this inclination of the articulated axis in the extended position of the two partial arms will match the incline of the articulated axis, which it experiences in the 90 ° position due to the torsional deformation of the inner partial arm.
  • a construction is often used for the boom in which the inner partial arm has a push rod arranged above or below it, and the partial arm and the push rod at their two ends by means of joints with horizontal axes on the one hand are connected to a support head on the sleeve surrounding the pivot pin and on the other hand to a housing surrounding the joint.
  • This construction is called a parallelogram boom.
  • the desired goal can be achieved in a simple manner that an elastically resilient element is integrated in the push rod.
  • the elastically resilient element can be formed, for example, by two compression springs which are inserted into a longitudinal bore of the push rod and are supported there with their ends facing away from one another on projections of the bore, while their mutually facing ends are supported on a collar of a bolt which is mounted in the longitudinal bore and can be displaced longitudinally issue. If a load acts on the load suspension device when the two partial arms are in the extended position, the one compression spring is loaded and compressed by a certain amount, which results in an extension of the overhead push rod or a shortening of the lower push rod.
  • the elastically resilient elements can be formed from a polymeric material, in particular a thermoplastic.
  • a sleeve 3 is pivotally mounted on a pivot pin 1 at the upper end of a column 2, with which an inner arm 4 is fixedly connected. At the free end of this arm 4 is the outer by means of a joint 5 Arm 6 pivotally mounted. This has at its free end a guide 7 for the vertically movable mounting of the telescopic rod 8, which carries a load hook 9 at its lower end.
  • a lifting drive 10 is provided which is connected to the telescopic rod by means of a rope 11.
  • FIG. 2 The top view of this lifting device shown in FIG. 2 reveals that the inner part arm 4 can be pivoted about the pivot pin 3 in such a way that the joint 5 describes the circular arc 12 shown in dashed lines.
  • the outer partial arm 6 can additionally be pivoted about the joint 5, the telescopic rod 8 describing the dashed circular arc 13.
  • the outer arm 6 can assume the extreme positions designated by the letters A, B, C and D.
  • a housing 14 is connected to the free end of the inner partial arm 4, in which a pin 15, which is connected to the outer partial arm 6, is pivotably mounted.
  • the inner rings are on the pin 15 16 and 17 arranged by two axially spaced slide bearings. These are fixed by spacer sleeves 18 and 19 and a snap ring 20 on the pin 15.
  • the inner ring 17 forms, together with the outer ring 21, a spherical plain bearing with spherical sliding surfaces, which permits a pivoting movement of the pin 15.
  • An outer part 22 interacts with the inner ring 16 and, as shown in FIG. 4, has a square outer contour. This outer part 22 is inserted into an elongated hole 23 of the housing 14, the dimensions of which are selected such that the outer part has a displacement path in the direction of the longitudinal axis of the inner part arm 4, while it is guided without play in the transverse direction. The spaces remaining on both sides of the outer part 22 with respect to the elongated hole 23 are filled with an elastically flexible material 24.
  • FIG. 5 shows a variant of a lifting device in which a column 25 carries at its upper end a sleeve 27 which is pivotably mounted thereon about a pivot pin 50 and to which a support head 26 is connected at its upper end.
  • the inner partial arm 29 is articulated by means of a joint 28 with a horizontal axis and the other at the other end by means of the joint 30 the housing 31 is connected.
  • a push rod 32 is arranged parallel to the inner part arm 29 and above it, which is also connected with joints 33 and 34 on the one hand to the support head 26 and on the other hand to the housing 31.
  • the sleeve 27 has a cantilevered bracket 35 which carries a fluid cylinder 36, the piston rod 37 of which engages the inner part arm 29.
  • a fluid cylinder 36 By actuating the fluid cylinder 36, the parallelogram arm containing the inner part arm 29 and the push rod 32 and thus the housing 31 can be raised or lowered.
  • the outer part arm 38 which carries the load hook 39 at its angled end, can be pivotably mounted.
  • FIGS. 3 and 4 The relationships shown in Fig. 2 are the same in this variant of a lifting device. Their negative effects can therefore be remedied in the same way as described there, e.g. by the hinge located in the housing 31 forms in the same way as shown in FIGS. 3 and 4.
  • Fig. 7 which shows a cross section along line VII-VII of Fig. 6, it can be seen that the bolt 34 is surrounded by a sleeve 41 made of an elastically resilient material, which is inserted into an eye 42 of the push rod 32.
  • the sleeve 41 can yield elastically, as a result of which the pin 40 is inclined with respect to the vertical.
  • FIG. 8 shows a further variant in which a head part 43 is mounted on the pin 34, into which a bolt 44 is screwed, which has a collar 45 approximately in the middle.
  • This bolt engages in a longitudinally displaceable manner in a bore 46 of the push rod 32, in which two compression springs 47 are accommodated, which bear with their mutually facing ends on the collar 45 and with their other ends on the one hand on a snap ring 48 inserted in the bore 46 and on the other hand support on a pressure piece 49 closing the bore 46.
EP97104014A 1996-04-10 1997-03-11 Flèche pour un appareil de levage Expired - Lifetime EP0802151B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29606489U 1996-04-10
DE29606489U DE29606489U1 (de) 1996-04-10 1996-04-10 Ausleger für ein Hebegerät

Publications (2)

Publication Number Publication Date
EP0802151A1 true EP0802151A1 (fr) 1997-10-22
EP0802151B1 EP0802151B1 (fr) 2002-07-31

Family

ID=8022354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97104014A Expired - Lifetime EP0802151B1 (fr) 1996-04-10 1997-03-11 Flèche pour un appareil de levage

Country Status (2)

Country Link
EP (1) EP0802151B1 (fr)
DE (2) DE29606489U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016445C2 (nl) * 2000-10-20 2002-04-23 Staal En Constructiebouw Goere Giekconstructie.
CN105417380A (zh) * 2015-11-27 2016-03-23 河南新科起重机股份有限公司 一种新型智能化立柱摆臂起重机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013201768A1 (de) * 2013-02-04 2014-08-07 Krones Ag Etikettiermaschine mit einer Hebevorrichtung
DE102015108725A1 (de) * 2015-06-02 2016-12-08 Terex Cranes Germany Gmbh Schwenklageranordnung mit einem Schwenkzapfen und mindestens einem Lagerbock und ein Montageverfahren hierfür
CN112919334A (zh) * 2021-01-25 2021-06-08 四川省星光钢结构有限公司 一种用于装配式钢结构的移动组合装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2350930A1 (fr) * 1976-05-12 1977-12-09 Fuchs Johannes Appareil en vue du deplacement manuel de charges
EP0238292A1 (fr) * 1986-03-18 1987-09-23 Willem Marines De Weerd Bras de service
EP0261367A2 (fr) * 1986-08-20 1988-03-30 Albert Böcker GmbH & Co. KG Monte-charge mobile
DE9012587U1 (fr) * 1990-09-03 1990-11-29 Zasche Foerdertechnik Gmbh, 8860 Noerdlingen, De
DE4203109A1 (de) * 1991-02-19 1992-08-20 Kuehnezug Foerdertechnik Gmbh Drehkran
DE4342715A1 (de) * 1993-12-15 1995-06-22 Zasche Foerdertechnik Gmbh Handgeführter Manipulator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7713637U1 (de) * 1977-04-29 1982-01-21 Fa. Johannes Fuchs, 7257 Ditzingen Vorrichtung zum manuellen bewegen von lasten

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2350930A1 (fr) * 1976-05-12 1977-12-09 Fuchs Johannes Appareil en vue du deplacement manuel de charges
EP0238292A1 (fr) * 1986-03-18 1987-09-23 Willem Marines De Weerd Bras de service
EP0261367A2 (fr) * 1986-08-20 1988-03-30 Albert Böcker GmbH & Co. KG Monte-charge mobile
DE9012587U1 (fr) * 1990-09-03 1990-11-29 Zasche Foerdertechnik Gmbh, 8860 Noerdlingen, De
DE4203109A1 (de) * 1991-02-19 1992-08-20 Kuehnezug Foerdertechnik Gmbh Drehkran
DE4342715A1 (de) * 1993-12-15 1995-06-22 Zasche Foerdertechnik Gmbh Handgeführter Manipulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016445C2 (nl) * 2000-10-20 2002-04-23 Staal En Constructiebouw Goere Giekconstructie.
CN105417380A (zh) * 2015-11-27 2016-03-23 河南新科起重机股份有限公司 一种新型智能化立柱摆臂起重机

Also Published As

Publication number Publication date
EP0802151B1 (fr) 2002-07-31
DE59707829D1 (de) 2002-09-05
DE29606489U1 (de) 1996-06-20

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