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WO1989011435A1 - Grue - Google Patents

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Publication number
WO1989011435A1
WO1989011435A1 PCT/SE1989/000274 SE8900274W WO8911435A1 WO 1989011435 A1 WO1989011435 A1 WO 1989011435A1 SE 8900274 W SE8900274 W SE 8900274W WO 8911435 A1 WO8911435 A1 WO 8911435A1
Authority
WO
WIPO (PCT)
Prior art keywords
arm
frame
arms
load
crane
Prior art date
Application number
PCT/SE1989/000274
Other languages
English (en)
Inventor
Lars Bohman
Original Assignee
Lars Bohman
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 Lars Bohman filed Critical Lars Bohman
Publication of WO1989011435A1 publication Critical patent/WO1989011435A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/001—Arrangements compensating weight or flexion on parts of the machine
    • B23Q11/0017—Arrangements compensating weight or flexion on parts of the machine compensating the weight of vertically moving elements, e.g. by balancing liftable machine parts
    • B23Q11/0021—Arrangements compensating weight or flexion on parts of the machine compensating the weight of vertically moving elements, e.g. by balancing liftable machine parts the elements being rotating or pivoting
    • 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

Definitions

  • the present invention relates to a crane according to t preamble of the appended claim 1.
  • the conception crane is here intended to comprise all kinds devices for moving loads between two points, and these poin may be located in the same or in different horizontal planes.
  • Cranes of this kind may be utilized within a great number different fields, of which moving tools and other objects ov a working place, such as an engineering work shop, will described here so as to illustrated but in no way delimit th invention.
  • the most common cranes for moving loads over and within working place do not not completely correspond to the preambl of claim 1, but they must nevertheless be considered to consti tute the prior art in this field.
  • One type of such cranes has frame and an arm usually rigidly fastened thereon and extendin substantially horizontal, along which arm a carriage means ma be driven by influence of power.
  • a load carrying means such a a steel wire with for instance a hooking member, hangs in th carriage means.
  • the frame may be turnably arranged on a stan about a substantially vertical axis, so that at all points i the room within the circle, the radius of which is formed b the arm, may be reached.
  • thi crane The greatest disadvantage of thi crane consists in that it through its arm continuously project far in the room, even if the load to be moved is located ver close to the frame of the crane, and it is therefore perhap in the way for other works or transports of other objects utilized in carrying out a certain work. Additionally, th torques on the frame may be high and the latter must b properly reinforced.
  • Another type of cranes with this field of use has a frame rotatably arranged about a substantially vertical axis, o which frame a first arm extending substantially horizontally is secured.
  • This first arm is terminated by a bearing with substantially vertical center axis, in which one end of a second arm extending also substantially horizontally is ar ranged.
  • a load carrying member is arranged on the extremity of the second arm.
  • said bearing has to have small tole ⁇ rances, so that no play and by that difficulties in pivoting the two arms with respect to each other shall be established, whereby the manufacturing costs may increase considerably.
  • torques caused by loads carried on the extremity of the second arm upon said bearing lead to plays in the same. This results in bitings and irregular operating of the crane.
  • the object of the present invention is to provide a crane n having the drawbacks of the cranes described above.
  • a particularly advantageous embodiment of the invention i defined in claim 7.
  • this tools such as welding machine may in a simple way be brought between different stations places of a working place under continuous maintaining of certain altitude.
  • Fig 1 is a perspective front view obliquely from above of first preferred embodiment of the crane according to t invention
  • Fig 2 is an enlarged perspective rear view of a portion of t crane in Fig 1 with some parts broken away for clarity,
  • Fig 3 is an enlarged side view of a portion of the cran according to Fig 1 with some parts broken away and some const ructional parts indicated by dashing, and
  • Fig 4 is a perspective view of a second preferred embodimen according to the invention in another position than the cran according to Fig 1.
  • the frame 2 has a lower support plate 4, o which two square beams 5 extending upwardly substantiall perpendicular from this are arranged at mutual distance. lying square beam 6 interconnecting beams 5 is arranged on th plate 4.
  • the pivot 3 is secured in the former square beam 6.
  • U-beam 7 is arranged behind each square beam 5 extending in th vertical direction, which U-beam is open towards the opposit U-beam.
  • the legs of the U-beams 7 have substantially the sam length as the sides of the square beams 5 against which one le of each U-beam bears and is secured to.
  • a first arm 8 i pivotably arranged on the frame 2 about an axle 9 extendin between the two U-beams 7 and intended to be substantiall horizontally directed.
  • the first arm 8 consists of a hollow square beam extendin through the space between the square beams 5 and the U-beams of the frame on both sides of said axle 9. Walls have bee removed from the first arm 8 at one 10 of its ends, so that i may receive a second arm 12 pivotably arranged on an axle 1 substantially parallel to the axle 9.
  • the second arm 12 als consists of a hollow square beam which extends on both sides o the axle 11.
  • the second arm 12 is adapted to carry a load through the firs end 13 located most distant from the frame 2, while a firs link 14 in the form of a hollow square beam is pivotabl connected to the second end 16 of the second arm about an axl 15 substantially parallel to the axles 9 and 11.
  • the end of th first link located opposite to the second arm 12 is secured t an axle 17 substantially parallel to the axle 9, on each end o which axle 17 rollers or ball bearings 18 are rotatably ar ranged.
  • the rollers 18 are arranged to bear upon a suppor surface 7' of their own in the form of that leg of each U-be which bears against the square beam 5 in question.
  • the diamet of the rollers 18 is slightly smaller than the distance betwe the two legs of the U-beam in question.
  • two other links 19, for instance in the form iron plates, are pivotably arranged on each side of the fir arm 8 about an axle 20 extending substantially parallel to a right through the first arm.
  • the second links 5 are at the opposite ends pivotably arranged about the axle 17.
  • a rear sheet 21 is arranged between the U-bea 7 in order to protect the inner parts of the frame but all the first arm to pivot to a position in parallel with the pla 4, and the two square beams 5 are at their tops closed by ca 22, preferably made of plastic.
  • the distance between the axle 17 and the axle 20 is substa tially just as long as the distance between the axle 11 and t axle 15, and the distance between the axle 20 and the axle is substantially just as long as the distance between the ax 17 and the axle 15, whereby the links 14 and 19 together wi the two arms 8 and 12 form a parallel linkage. Furthermore, t axle 17 provided with rollers is located substantially in t same vertical plane as the axle 9 of the first arm on t frame, and as a result of this the distance between the axles and 20 has to be substantially equal to the distance betwee the axles 11 and 15.
  • the first 8 an the second 12 arm will in every assumed position make substan tially the same angle with the vertical line, provided that th pivot 9 of the frame is substantially vertically directed Furthermore, if the distances between the two pivot axes 9 an 11 of the first arm on the frame 2 and on the second arm 12 respectively, is chosen to be equal to the distance between th pivot axis 11 and that point 23 of the first end 13 of th second arm in which a load is intended to be suspended, possib ly by any type of grasping means, the point 23 will continuous ly move in the horizontal plane in which this point and th axle 9 are located, when the two arms 8, 12 are pivoted wit respect to each other.
  • the load may be moved i one and the same horizontal plane by changing the inclinatio of the two arms 8, 12 with respect to each other and possibl pivoting the frame about the axis of the pivot 3, but withou the necessity of further regulation of the position of the loa in the vertical direction.
  • the great advantage of the crane according to the invention consists in that it is self-braking, i.e. it assures by itself that every relative position between the two arms 8, 12 and the frame is stable. This is achieved by the arrangement accordin to the invention of the linkage with the bearing of the rollers 18 against the support surfaces 7 ' formed by the legs of the U-beams 7.
  • the end of the first arm located on the opposite side of t frame 2 with respect to the second arm 12 is provided with rod 24, on which a suitable number of weights 25 acting balances may be laid, in order to reduce breaking forces a torques generated by the weight of the two arms, the links a the load mainly on the axles 11, 15, 17 and 20 and the pivot
  • the magnitude of the balance is adjusted according to the lo intended to be carried by the second arm.
  • the cra in this Figure is by the load receiving end of the second a extending at a great distance from the frame 2 with respect the crane shown in Fig 1, so that the rollers running insi the U-beams are located on a lower level than in Fig 1.
  • Th crane is adapted to carry loads 27, as the one indicated b dashed lines, which are excentrically located with respect to vertical line through the point 23 of the second arm 12.
  • further parallel linkage has been arranged in order to maintai the load in a certain position relative to a vertical line, preferably in parallel with this.
  • the means 32 may be a telescope device for lifting a load 27, which for instance is grasped by means of a fork 33. Possible hydraulic conduits or the like for operating the telescope means 32 has not been shown in the Figure.
  • the distance between the axle 11 and the point 23 could for instance be made longer or shorter than the distance between the axles 9 and 11, through which a movement of the point 23 along a line inclined with respect to a horizontal line will be achieved.
  • the distance between the axle 9 and the axle 20 could be ma different from the distance between the axle 11 and the ax 15, through which the arms 8 and 12 would not have the sa inclination with respect to a vertical line any more and a lo would not be moved in a horizontal plane any longer.
  • the frame could naturally be arranged on a sta with the pivot 3 inclined with respect to a vertical line, b this would seldom be desired.
  • the sta could be made vertically adjustable.
  • the frame could be designed in different other ways, in whi it is only necessary to provide a support surface for a beari arrangement.
  • the bearing arrangement may be constituted by o single roller or for instance a carriage sliding on a suppo surface in the form of a rail.
  • the axle 17 could be rotatab arranged in the link 14 and the rollers 18 rigidly secured the axle.
  • the different squarebeams could of course be replaced by oth types of longitudinal elements, by which it is only requir that the first 14 and the second 19 link are transmittin tractive forces but not transmitting co ⁇ ressive forces, an they could therefore be replaced by for example steel wires.
  • the balance could if desired be removed or designed in anothe way.
  • An arbitrary motor device could be arranged in order to achiev motorized operation of the crane. Such an operation could b obtained for example by making the rollers 18 motordriven an design them as gear wheels engaging stationary teeth path forming the support surfaces.
  • the crane could if desired b provided with holding or locking means arranged to hold or loc the arm 8 in the desired positions relative to the frame 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

La grue décrite comprend un premier bras (8) disposé pivotant sur une charpente (2) autour d'un axe sensiblement horizontal (9), un second bras (12) disposé pivotant sur le premier bras autour d'un axe sensiblement horizontal (11), une charge (27) constituée par exemple par un outil et destinée à être portée par le second bras, ainsi qu'un agencement servant à maintenir les bras (8, 12) dans les positions relatives désirées par rapport à la charpente (2) et l'un par rapport à l'autre. L'agencement comporte des éléments d'articulation (14, 19) reliant chaque bras à un agencement porteur (17, 18) destiné à s'appuyer sur une surface de support (7') de la charpente (2) et à être mobile le long de cette surface, de sorte que, dans toutes les positions occupées par les bras, les couples générés par les forces émanant des poids de la charge et des bras par rapport aux deux axes de pivot (9, 11) mentionnés ci-dessus s'équilibrent entre elles.
PCT/SE1989/000274 1988-05-24 1989-05-18 Grue WO1989011435A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8801916-1 1988-05-24
SE8801916A SE463453B (sv) 1988-05-24 1988-05-24 Utbalanserad kran

Publications (1)

Publication Number Publication Date
WO1989011435A1 true WO1989011435A1 (fr) 1989-11-30

Family

ID=20372400

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1989/000274 WO1989011435A1 (fr) 1988-05-24 1989-05-18 Grue

Country Status (2)

Country Link
SE (1) SE463453B (fr)
WO (1) WO1989011435A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8011828B2 (en) 2007-05-23 2011-09-06 Siemens Aktiengesellschaft Shoulder joint
US8113711B2 (en) 2007-05-23 2012-02-14 Siemens Aktiengesellschaft Shoulder joint
CN102743186A (zh) * 2011-04-20 2012-10-24 上海西门子医疗器械有限公司 一种可折叠式压迫器及x光机
CN110093886A (zh) * 2018-01-30 2019-08-06 岭东核电有限公司 隧洞清理机

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1344659A (en) * 1919-12-26 1920-06-29 Whiting Foundry Equipment Comp Counterbalanced crane
SE379332B (fr) * 1974-01-22 1975-10-06 Foralkranar Ab
SE389326B (sv) * 1972-11-14 1976-11-01 Motoda Electronics Varuhanteringsapparat med parallellogramlenksarm.
SE400539B (sv) * 1976-11-12 1978-04-03 Frisk Knut Olov Lasthanteringsdon med av parallellprogramlenkar uppbyggt lyftarmssystem
SE433584B (sv) * 1976-06-18 1984-06-04 Hans Richter Industrirobot

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1344659A (en) * 1919-12-26 1920-06-29 Whiting Foundry Equipment Comp Counterbalanced crane
SE389326B (sv) * 1972-11-14 1976-11-01 Motoda Electronics Varuhanteringsapparat med parallellogramlenksarm.
SE379332B (fr) * 1974-01-22 1975-10-06 Foralkranar Ab
SE433584B (sv) * 1976-06-18 1984-06-04 Hans Richter Industrirobot
SE400539B (sv) * 1976-11-12 1978-04-03 Frisk Knut Olov Lasthanteringsdon med av parallellprogramlenkar uppbyggt lyftarmssystem

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8011828B2 (en) 2007-05-23 2011-09-06 Siemens Aktiengesellschaft Shoulder joint
DE102007023847B4 (de) * 2007-05-23 2011-12-08 Siemens Ag Schultergelenk
US8113711B2 (en) 2007-05-23 2012-02-14 Siemens Aktiengesellschaft Shoulder joint
DE102007023848B4 (de) * 2007-05-23 2012-08-02 Siemens Ag Schultergelenk
CN102743186A (zh) * 2011-04-20 2012-10-24 上海西门子医疗器械有限公司 一种可折叠式压迫器及x光机
CN110093886A (zh) * 2018-01-30 2019-08-06 岭东核电有限公司 隧洞清理机
CN110093886B (zh) * 2018-01-30 2024-01-19 岭东核电有限公司 隧洞清理机

Also Published As

Publication number Publication date
SE8801916D0 (sv) 1988-05-24
SE463453B (sv) 1990-11-26
SE8801916L (sv) 1989-11-25

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