EP1386878A1 - Hydraulic stone grab with means to incite additional functions - Google Patents

Hydraulic stone grab with means to incite additional functions Download PDF

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Publication number
EP1386878A1
EP1386878A1 EP03077162A EP03077162A EP1386878A1 EP 1386878 A1 EP1386878 A1 EP 1386878A1 EP 03077162 A EP03077162 A EP 03077162A EP 03077162 A EP03077162 A EP 03077162A EP 1386878 A1 EP1386878 A1 EP 1386878A1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
stone grab
switching part
grab
stone
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
EP03077162A
Other languages
German (de)
French (fr)
Other versions
EP1386878B1 (en
Inventor
Joseph Jacobus Kennis
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Individual
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Individual
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Publication date
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Publication of EP1386878A1 publication Critical patent/EP1386878A1/en
Application granted granted Critical
Publication of EP1386878B1 publication Critical patent/EP1386878B1/en
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
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/44—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces
    • B66C1/445—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces motor actuated
    • B66C1/447—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces motor actuated by hydraulic or pneumatic motors

Definitions

  • the invention concerns a stone grab of the type where with the help of a hydraulic cylinder a packet stones or such is clamped to be transported. This type especially used with hydraulic cranes.
  • the stone grab is adjustable.
  • a part is expandable where the adjustment is fixed with lock pins.
  • the invention contains a solution where with auxiliary cylinders the lock pins are operated where no extra hydraulic components have to be added to the crane or suspension.
  • An often used type grab has in the hydraulic rotator a connection for the supply and discharge conduit for the clamping cylinder. To operate the stone grab according to the invention the existing connections and operation valves can be used.
  • auxiliary cylinders To operate the auxiliary cylinders there is a switching mechanism installed where conduits of the clamping cylinder are switched to one of the lock pins and after that served from the operator seat.
  • the width of the grab is set with the help of the clamping cylinder and after that the lock pin is reset after switching over.
  • the switching over is accomplished by placing the stone grab on the ground and lower the crane some centimetres after that.
  • the rotator will be disconnected and can rotate free by which the rotator operates the switching part with a cam the switching valves.
  • By turning the rotator into the lifting position and lift the stone grab the clamping cylinder will be activated for clamping the packet stones and the stone grab is rotating fixed to the rotator.
  • the rotator can be used to operate the lock pins in a direct mechanical way.
  • Fig. 1 is with stone grab (1) the stone grab indicated.
  • Stone grab (1) is connected to the crane with swing (2) on rotator (3).
  • Stone grab (1) has near the suspension switching box (4) in which are located the hydraulic valves (5) and (6).
  • the adjustment mechanism (7) is suspended by rods (8).
  • Clamping cylinder (9) is connected with clamping arms (10) which pivot around pivots (11).
  • In adjustment mechanism (7) are two lock pin cylinders (12) which are double acting and each is foreseen with two lock pins (13).
  • the adjustment mechanism consists of two hollow profiles (14) having inside draw bars (15) with borings (16). By adjusting the draw bars (15) the length can be adjusted.
  • the switching box (4) is connected to switching part (17) with suspension eye (18).
  • Switching part (17) is foreseen with coupling plate (19).
  • Coupling plate (19) is oblong and is locked in the lifting position by plates (20) which have fitting notches.
  • Between suspension eye (18) and coupling plate (19) is a cylindric part (21) which permits axial movement and rotating in switching box (4).
  • Cam (22) is connected to coupling plate (19) which can operate valves (5) and (6) on rotating switching part (17).
  • Cam (22) has such a position that in lifting position valves (5) and (6) are in point of departure.
  • FIG. 9 An optional version of the invention consists of a direct mechanical operation of the lock pins.
  • Fig. 9 is in place of a cam (22) on switching part (17) foreseen of a drive to crankshaft (28) and crankshaft (29) with a chain or toothed belt.
  • crankshaft (28), (29) To crankshaft (28), (29) is a double crank (30), (31), which are pivoting connected with rods (32) to lock pins (13).
  • the double cranks are placed under an angle of 90 degrees where the cranks are placed under an angle of 45 degrees in relation to he centre line of lock pins (13).
  • double crank (30) When switching part (17) 45 degrees is rotated from the point of departure according to arrow (33) double crank (30) will give a large displacement (35) to lock pins (13) and draw bars (15) are set free. Double crank (31) will give then lock pins (13) a small oscillating movement (36) by which the locking remains. A rotating according to arrow (34) will unlock the other set of lock pins the same way and keep the first locked.
  • the stone grab (1) is placed on the ground.
  • the arm of the crane is lowered.
  • the stone grab (1) is set on the correct clamping width.
  • the mechanical version requires only turning of switching part (17) to set a set of lock pins (13) free where at the returning the lock pins (13) come to position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Earth Drilling (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

To adjust a hydraulically actuated stone grab (1) to stone packets of different dimensions, locking pins (13) have to be operated by auxiliary cylinders (12). To operate the auxiliary cylinders (12), a switching mechanism, comprising cam operated valves (5,6), is installed in the grab impression to that the hydraulic fluid is sent to the auxiliary cylinders (12) or to the hydraulic clamping cylinder (9).

Description

  • The invention concerns a stone grab of the type where with the help of a hydraulic cylinder a packet stones or such is clamped to be transported. This type especially used with hydraulic cranes.
  • Because the to be transported packets differ in dimension the stone grab is adjustable. For this purpose a part is expandable where the adjustment is fixed with lock pins. These lock pins are removed by hand , after which with the hydraulic clamping cylinder will be adjusted and then the lock pins are reset by hand and locked.
  • This operation requires manual effort and walking from the operator seat to the grab and visa versa causes a considerable interruption of the labour.
  • The invention contains a solution where with auxiliary cylinders the lock pins are operated where no extra hydraulic components have to be added to the crane or suspension. An often used type grab has in the hydraulic rotator a connection for the supply and discharge conduit for the clamping cylinder. To operate the stone grab according to the invention the existing connections and operation valves can be used.
  • To operate the auxiliary cylinders there is a switching mechanism installed where conduits of the clamping cylinder are switched to one of the lock pins and after that served from the operator seat. The width of the grab is set with the help of the clamping cylinder and after that the lock pin is reset after switching over. The switching over is accomplished by placing the stone grab on the ground and lower the crane some centimetres after that. The rotator will be disconnected and can rotate free by which the rotator operates the switching part with a cam the switching valves. By turning the rotator into the lifting position and lift the stone grab the clamping cylinder will be activated for clamping the packet stones and the stone grab is rotating fixed to the rotator.
  • Optional to the hydraulic version the rotator can be used to operate the lock pins in a direct mechanical way.
  • The invention will be explained with the help of the drawing.
  • Fig. 1 shows partly in cross section the stone grab on the side.
  • Fig. 2 shows in cross section the switching box in switching position.
  • Fig. 3 shows in cross section the switching box in lifting position.
  • Fig. 4 shows cross section IV-IV
  • Fig. 5 shows cross section V-V.
  • Fig. 6 shows the hydraulic diagram according to the invention.
  • Fig. 7 shows the mechanism for adjustment.
  • Fig. 8 shows a cross section over the lock pin.
  • Fig. 9 shows schematic a mechanical operation of the lock pins in closed position
  • Fig. 10 shows the mechanical operation in the position where two lock pins are retracted.
  • In Fig. 1 is with stone grab (1) the stone grab indicated. Stone grab (1) is connected to the crane with swing (2) on rotator (3). Stone grab (1) has near the suspension switching box (4) in which are located the hydraulic valves (5) and (6). The adjustment mechanism (7) is suspended by rods (8). Clamping cylinder (9) is connected with clamping arms (10) which pivot around pivots (11). In adjustment mechanism (7) are two lock pin cylinders (12) which are double acting and each is foreseen with two lock pins (13).
  • The adjustment mechanism consists of two hollow profiles (14) having inside draw bars (15) with borings (16). By adjusting the draw bars (15) the length can be adjusted.
  • The switching box (4) is connected to switching part (17) with suspension eye (18). Switching part (17) is foreseen with coupling plate (19). Coupling plate (19) is oblong and is locked in the lifting position by plates (20) which have fitting notches. Between suspension eye (18) and coupling plate (19) is a cylindric part (21) which permits axial movement and rotating in switching box (4). Cam (22) is connected to coupling plate (19) which can operate valves (5) and (6) on rotating switching part (17). Cam (22) has such a position that in lifting position valves (5) and (6) are in point of departure.
  • In Fig. 6 the hydraulic diagram is given. Conduit (23) to press out cylinder (9) goes via valve (5) and valve (6) where in point of departure the connection is open. The return conduit (24) is connected with the return conduits of lock pin cylinders (12). When valve (5) or (6) is activated conduit (23) is closed and connected with conduit (25) or (26) with lock pin (12) and are operated by the operating handles of clamping cylinder (9)
  • For keeping stone grab (1) in balance it is necessary to have the same adjustment on both sides.
  • An optional version of the invention consists of a direct mechanical operation of the lock pins. In Fig. 9 is in place of a cam (22) on switching part (17) foreseen of a drive to crankshaft (28) and crankshaft (29) with a chain or toothed belt. To crankshaft (28), (29) is a double crank (30), (31), which are pivoting connected with rods (32) to lock pins (13). The double cranks are placed under an angle of 90 degrees where the cranks are placed under an angle of 45 degrees in relation to he centre line of lock pins (13).
  • When switching part (17) 45 degrees is rotated from the point of departure according to arrow (33) double crank (30) will give a large displacement (35) to lock pins (13) and draw bars (15) are set free. Double crank (31) will give then lock pins (13) a small oscillating movement (36) by which the locking remains. A rotating according to arrow (34) will unlock the other set of lock pins the same way and keep the first locked.
  • The procedure is as follows:
  • The stone grab (1) is placed on the ground.
  • The arm of the crane is lowered.
  • With the rotator (3) switching part (17) is turned a quarter turn so that valve (5) is activated.
  • With the handle of clamping cylinder (9) draw bars (15) are made free with lock pin cylinder (12).
  • With the rotator (3) switching part (17) is returned in the departing position.
  • With the handle of the clamping cylinder (9) the stone grab (1) is set on the correct clamping width.
  • With the rotator (3) switching part (17) is turned a quarter turn so that valve (5) is activated.
  • With the handle of the clamping cylinder (9) draw bars (15) are secured with lock pin cylinder (12).
  • With the rotator (3) switching part (17) is returned in the departing position.
  • To adjust the other draw bars (15) the same procedure is executed with the help of valve (6).
  • After adjustment coupling plate (19) is lifted and locked between plates (20) by lifting the stone grab (1).
  • The mechanical version requires only turning of switching part (17) to set a set of lock pins (13) free where at the returning the lock pins (13) come to position.

Claims (5)

  1. Hydraulic stone grab of the type that is connected with a rotator to a mobile hydraulic crane with a switching appliance for hydraulic additional functions characterised by that stone grab (1) is connected to the switching part (17) where switching part (17) is sliding and in slided-in position revolving and cam (22) can activate one or more valves (5, 6) where the operation of the principal function is switched to the additional function.
  2. Hydraulic stone grab according to claim 1 characterised by that switching part (17) is foreseen with a suspension eye (18) and an oblong plate (19) which at slided-in position comes free from notches in plate (20) where by revolving of switching part (17) cam (22) activates valves (5, 6).
  3. Hydraulic stone grab according to claim 1 and 2 characterised by that stone grab (1) is foreseen with an adjusting mechanism where draw bars (15) in hollow profile (14) are locked with lock pins (13) which are activated by cylinders (12).
  4. Hydraulic stone grab according to claim 1, 2 and 3 characterised by that switching part (17) is slided in by placing the stone grab (1) on the ground and lowering the crane.
  5. Hydraulic stone grab according to claim 1, 2, 3 and 4 characterised by that switching part (17) drives a set double cranks (28, 29) where double cranks (28, 29) are placed under an angle of 90 degrees and under an angle of 45 degrees in relation to the centre line of lock pins (13) where the lock pins (13) are connected to double cranks (28, 29) with rods (32).
EP03077162A 2002-07-31 2003-07-10 Hydraulic stone grab with means to incite additional functions Expired - Lifetime EP1386878B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1021187 2002-07-31
NL1021187A NL1021187C2 (en) 2002-07-31 2002-07-31 Hydraulic brick clamp connectable to mobile hydraulic crane, has locking pin position changed using cam operated hydraulic switching valve

Publications (2)

Publication Number Publication Date
EP1386878A1 true EP1386878A1 (en) 2004-02-04
EP1386878B1 EP1386878B1 (en) 2004-11-03

Family

ID=27607218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03077162A Expired - Lifetime EP1386878B1 (en) 2002-07-31 2003-07-10 Hydraulic stone grab with means to incite additional functions

Country Status (4)

Country Link
EP (1) EP1386878B1 (en)
AT (1) ATE281399T1 (en)
DE (1) DE60300132D1 (en)
NL (1) NL1021187C2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012048589A1 (en) * 2010-10-14 2012-04-19 湖南三一智能控制设备有限公司 Single cylinder pluggable pin mechanism used in hoist of telescope arm
CN102718128A (en) * 2012-06-19 2012-10-10 田利新 Synchronizing mechanism for heavy manipulator
CN102815551A (en) * 2012-08-03 2012-12-12 安徽省池州市盛大专用车装备制造有限公司 Gripper for loading and unloading stacked bricks
CN103626028A (en) * 2013-11-05 2014-03-12 张家港保税区多元机械设备制造有限公司 Unpowered fixture
CN105366537A (en) * 2015-11-17 2016-03-02 盐城苏工高科机械有限公司 Hydraulic clamping jaw of heavy type lifting device
CN106946151A (en) * 2017-03-16 2017-07-14 昆明理工大学 A kind of hydraulic clamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105398952B (en) * 2015-11-30 2017-09-26 江苏多元机械有限公司 A kind of finished product is laid bricks fixture

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2370528A (en) * 1942-07-15 1945-02-27 Robert A Fontaine Material handling device
US2564357A (en) * 1947-03-15 1951-08-14 Albert R Falkner Moving means for building blocks
FR2159342A1 (en) * 1972-11-06 1973-06-22 Brun Paul Le
GB1556369A (en) * 1976-12-14 1979-11-21 Hy Mac Ltd Grabs
DE29717320U1 (en) * 1997-09-27 1998-01-08 Hermann Steinweg KG Baumaschinenfabrik, 59368 Werne Device for gripping and lifting stacks, in particular stone stacks

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2370528A (en) * 1942-07-15 1945-02-27 Robert A Fontaine Material handling device
US2564357A (en) * 1947-03-15 1951-08-14 Albert R Falkner Moving means for building blocks
FR2159342A1 (en) * 1972-11-06 1973-06-22 Brun Paul Le
GB1556369A (en) * 1976-12-14 1979-11-21 Hy Mac Ltd Grabs
DE29717320U1 (en) * 1997-09-27 1998-01-08 Hermann Steinweg KG Baumaschinenfabrik, 59368 Werne Device for gripping and lifting stacks, in particular stone stacks

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012048589A1 (en) * 2010-10-14 2012-04-19 湖南三一智能控制设备有限公司 Single cylinder pluggable pin mechanism used in hoist of telescope arm
CN102718128A (en) * 2012-06-19 2012-10-10 田利新 Synchronizing mechanism for heavy manipulator
CN102815551A (en) * 2012-08-03 2012-12-12 安徽省池州市盛大专用车装备制造有限公司 Gripper for loading and unloading stacked bricks
CN103626028A (en) * 2013-11-05 2014-03-12 张家港保税区多元机械设备制造有限公司 Unpowered fixture
CN103626028B (en) * 2013-11-05 2016-06-08 江苏多元机械有限公司 A kind of unpowered fixture
CN105366537A (en) * 2015-11-17 2016-03-02 盐城苏工高科机械有限公司 Hydraulic clamping jaw of heavy type lifting device
CN106946151A (en) * 2017-03-16 2017-07-14 昆明理工大学 A kind of hydraulic clamp

Also Published As

Publication number Publication date
DE60300132D1 (en) 2004-12-09
EP1386878B1 (en) 2004-11-03
ATE281399T1 (en) 2004-11-15
NL1021187C2 (en) 2003-06-06

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