US3881263A - Angular position controller for clam-shell bucket - Google Patents

Angular position controller for clam-shell bucket Download PDF

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Publication number
US3881263A
US3881263A US449609A US44960974A US3881263A US 3881263 A US3881263 A US 3881263A US 449609 A US449609 A US 449609A US 44960974 A US44960974 A US 44960974A US 3881263 A US3881263 A US 3881263A
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US
United States
Prior art keywords
piston rod
rod means
cavity
driving rod
jaws
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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
Application number
US449609A
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English (en)
Inventor
Yves G Coeurderoy
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.)
Poclain SA
Original Assignee
Poclain SA
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Filing date
Publication date
Application filed by Poclain SA filed Critical Poclain SA
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Publication of US3881263A publication Critical patent/US3881263A/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3677—Devices to connect tools to arms, booms or the like allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
    • E02F3/3681—Rotators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/14—Grabs opened or closed by driving motors thereon
    • B66C3/16—Grabs opened or closed by driving motors thereon by fluid motors

Definitions

  • a clam-shell bucket comprises two jaws which are U-S- Cl. opened and closed means of a fluid-actuated ram 294/88 The angular position of the jaws is controlled by lnt. means of a motor is coupled to the jaws via a [58] Field of Search 37/182, 183 R, 183 A, 184,
  • the present invention relates to clam-shell buckets.
  • a clam-shell bucket comprising grasping elements, ram means for adjusting the position of said elements, said ram means comprising a cylinder having opposed end walls piston means slidable on the cylinder, and piston rod means carried by the piston means, said piston rod means including a central cavity open at at least one end of the piston rod means, motor means operative to adjust the angular orientation of the grasping elements, said motor means comprising a body member, and a shaft member rotatable relative to the body member, and rotary driving rod means, one of said members being rigid with an end portion of the piston rod means and the other of said members being coupled with the driving rod means, said driving rod means extending into the said cavity through the open end thereof.
  • a clam-shell bucket comprising jaws, a fluidactuated ram operative to open and close jaws, said ram including a cylinder having opposed end walls, and piston rod means movable in the cylinder an extending through the end walls, said piston rod means having an axial cavity extending along at least part of the length of the rod means, a motor operative to rotate the jaws about the axis of the ram, and a drive shaft extending into said cavity and coupled for rotation with the jaws, said motor being operative to drive the drive shaft.
  • FIG. I is an axial section of a first embodiment of a clam-shell bucket according to the present invention.
  • FIG. 2 is an axial section of a second embodiment in accordance with the present invention.
  • FIG. 3 is a fragmentary section ofa part ofa modified form of the bucket shown in FIGS. 1 and 2.
  • the clam-shell buckets shown in the accompanying drawings each include grasping elements in the form of two jaws l, and a ram 2 having a piston rod which extends through the two end walls 3a and 3b of the cylinder 3, the ram being actuable to open and close the jaws l.
  • the bucket is suspended from a beam 4 of an earth-working vehicle via one of the ends of the piston rod.
  • a plate 5 is made rigid with the end of the piston rod remote from the jaws I, by means of a key 6.
  • a casing 7 is fixed to the plate 5 by bolts 8 and comprises lugs 9 enabling the assembly to be attached to the beam 4 so as to be pivotally movable about a shaft 10.
  • the body 11 of a hydraulic motor is fixed to the casing 7 by screws 21, and the output shaft 12 of this motor is rigid with a pinion 13 meshing with pinion 14 with which a driving rod 15 is rigid.
  • Ducts, 18a and 18b connect the motor 11 to a hydraulic circuit for supplying fluid under pressure, the circuit being known per se.
  • piston rod 16 and the piston 17 of the ram 2 together constitute a single unit.
  • Ducts 19a and 1917 provided in the piston rod 16 lead respectively into two chambers 20a and 20b in the cylinder 3, one chamber being located on each side of the piston 17; these ducts are connected to a circuit for supplying fluid under pressure, the circuit being known per se.
  • a bar 22 is rotatably mounted on the end of the piston rod 16 adjacent .to the jaws l by means of an axial and rotary bearing 23.
  • the piston rod 16 comprises an axial cavity 24 and the driving rod 15 extends through the length of the cavity 24.
  • the rod 15 is rigid with a plate, which is fixed to the bar 22 by screws 26.
  • the driving rod 15 is also rotatably mounted in the piston rod 16 by means of two rotary bearings arranged at the two end portions of the piston rod 16.
  • the jaws l are mounted on the bar 22 so as to be pivotally movable about shafts 27.
  • Lugs 28 are provided which are rigid with the cylinder 3 whereas links 29 are connected at one end to the lugs 28 so as to be pivotally movable about shafts 30 whereas the other end of each link is pivotally connected to a respective one of the jaws I so as to be pivotally movable about a respective shaft 31.
  • the piston rod is not a single unit but comprises two separate parts, an upper part 16a and a lower part 16b, which are mounted rotatably with respect to one another, in a manner known per se, by means of an internal bearing 33 which is both an axial and a rotary bearing.
  • the upper part of this piston rod has an axial cavity which receives the driving shaft 15, the lower part 16b being solid.
  • the driving shaft 15 is guided inside the part 16 a by means of a rotary bearing 32a, arranged at the level of its upper end, and the driving shaft 15 is fast forrotation with the lower part 16b of the piston rod.
  • the bottom end of the bottom part 16b of the piston rod is made rigid with a bar 220.
  • the jaws l are connected to the bar 22a so as to be capable of pivotal movement about shafts 27.
  • the modification shown in FIG. 3 is applicable to the embodiments FIG. 1 and FIG. 2.
  • the driving hydraulic motor is a slow-speed motor. For this reason it is not necessary to provide means for reducing the speed of its output shaft 12a; by means of splines 13a, this shaft is made fast for rotation with a sleeve 35 and this sleeve is rigid with the rod 15.
  • the output shaft 12a is coaxial with the cavity 24 in the piston rod 16 or, in the case of the embodiment shown in FIG. 2, coaxial with the cavity 240 in the upper part 160 of the piston rod.
  • a cylindrical housing 36 is rigid with the plate 5, whereas the body 11a of the hydraulic motor is itself made rigid with this cylindrical part 36 by means of screws 21a.
  • the hydraulic motor is connected by ducts l8aa and l8bb to a circuit for supplying fluid under pressure, the circuit being known per se.
  • Lugs 9a rigid with the body of the motor are connected to the beam 4 so as to be capable of pivotal movement about the shaft 10.
  • the following components are fast for rotation with one another: the suspension lugs 9, the casing 7, the body 11 of the hydraulic motor, the plate 5 by means of the bolts 8, the piston rod 16 by means of the key 6, and the piston 17.
  • the following components are coupled for rotation with the output shaft of the hydraulic motor; the pinions 13 and 14, the driving rod 15, the plate 25, the bar 22 by means of the screws 26, the jaws 1 by means of the shafts 27, and the cylinder 3 by means of the links 29, the shaft 30 and 31 and the lugs 28.
  • the relative rotation of the output shaft 12 of the motor with respect to the body 11 of the motor therefore makes it possible to adjust the angular orientation of one of the groups of components with respect to the other, and more particularly that of the jaws 1 with respect to the lugs 9 and thus with respect to the beam 4.
  • the sliding movement of the cylinder 3 with respect to the piston rod 16 is of course in no way affected by the said angular orientation.
  • the following components are fast for rotation: the lugs 9, the casing 7, the body 11 of the hydraulic motor, the plate 5 by means of the bolts 8, and the upper part 16a of the piston rod.
  • the following components are fast for rotation with the output shaft 12 of the motor: the pinions l3 and 14, the driving rod 15, the lower part 161) of the piston rod, the bar 22a by means of the shaft 34, and the cylinder 3, by means of the links 29, the shaft 30 and 31 and the lugs 28.
  • the relative rotation of the output shaft 12 of the motor with respect to the body 11 of this motor therefore makes it possible to adjust the angular orientation of one of the groups of components with respect to the other group, and more particularly that of the jaws 1 with respect to the lugs 9, and thus with respect to the beam 4.
  • auxiliary frame comprising apertures to allow the lugs 28 to slide, for connecting the output shaft of the motor to the jaws 1.
  • the rotary driving shaft is at least as well protected against mechanical shocks and dirt, and various other causes of corrosion as the piston rod 16 or the upper part 160 of the piston rod inside which the driving shaft is arranged.
  • the pinions l3 and 14 co-operating inside the closing casing 7 are also well protected.
  • FIG. 3 The drive system shown in FIG. 3 is simpler than that of FIGS. 1 and 2. Moreover, it will be apparent that other types of motor can be used instead of hydraulic motors.
  • the clam-shell buckets particularly described are of relatively simple construction; further no sliding splines are used in the transmission of torque from the shaft 15 because the output shaft 12 of the hydraulic motor and the bar 22 or 22a are arranged at a constant distance from one another which is equal to the fixed length of the piston rod. This possibility is therefore associated with the fact that the piston rod extends through the end walls 3a and 3b of the cylinder 3 and incidentally permits the clam-shell bucket to be suspended from the beam 4.
  • the possibility of obviating the use of sliding splines is advantageous in that it leads to inexpensive and durable constructions.
  • a clam-shell bucket comprising grasping elements
  • ram means for adjusting the position of said elements, said ram means comprising,
  • piston means slidable in the cylinder
  • piston rod means carried by the piston means, said piston rod means including a central cavity open at at least one end of the piston rod means,
  • motor means operative to adjust the angular orientation of the grasping elements, said motor means comprising,
  • a bucket according to claim 1 further comprising bar means rotatably mounted on the other end portion of the piston rod means and movable axially with the piston rod means, said bar means being connected to the grasping elements and being fast for rotation with the driving rod means, said piston means and said piston rod means constituting a single unit, and the said cavity extending through the entire length of said piston rod means and being open at each end.
  • a bucket according to claim 2 wherein the bar means is movable axially with the driving rod means.
  • a bucket according to claim 2 further comprising bearing means arranged at the end portions of the piston rod means, said bearing means mounting said driving rod means.
  • a bucket according to claim 2 further comprising pivoted links, said links connecting the grasping elements to the cylinder, and said grasping elements being pivotally connected to the bar means.
  • piston rod means comprises first and second relatively rotatable coaxial parts
  • said one of said members being rigid with said first parts, said cavity extending through the entire length of said first part and being open at each end.
  • said bucket further comprising bar means, said bar means being rigid with said second part and being connected with the grasping elements, the driving rod means extending through said cavity and being fast for rotation with the second part.
  • a bucket according to claim 8 wherein the shaft member is coaxial with the driving rod means.
  • a clam-shell bucket comprising jaws
  • a fluid-actuated ram operative to open and close the jaws, said ram including i a cylinder having opposed end walls, and
  • piston rod means movable in the cylinder and extending through the end walls, said piston rod means having an axial cavity extending along at least part of the length of the rod means,
  • a motor operative to rotate the jaws about the axis of the ram
  • a drive shaft extending into said cavity and coupled for rotation with the jaws, said motor being operative to drive the drive shaft.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Earth Drilling (AREA)
  • Meat, Egg Or Seafood Products (AREA)
US449609A 1973-04-18 1974-03-11 Angular position controller for clam-shell bucket Expired - Lifetime US3881263A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7314238A FR2226353B1 (ko) 1973-04-18 1973-04-18

Publications (1)

Publication Number Publication Date
US3881263A true US3881263A (en) 1975-05-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
US449609A Expired - Lifetime US3881263A (en) 1973-04-18 1974-03-11 Angular position controller for clam-shell bucket

Country Status (10)

Country Link
US (1) US3881263A (ko)
JP (1) JPS537042B2 (ko)
AR (1) AR204917A1 (ko)
BE (1) BE812128A (ko)
BR (1) BR7402653D0 (ko)
DE (1) DE2413200C3 (ko)
ES (1) ES425476A1 (ko)
FR (1) FR2226353B1 (ko)
GB (1) GB1426133A (ko)
IT (1) IT1011667B (ko)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005895A (en) * 1975-11-17 1977-02-01 Cullings Harold L Rotational grapple
US4047313A (en) * 1975-02-10 1977-09-13 International Harvester Company Convertible grab bucket
US4218960A (en) * 1976-07-05 1980-08-26 Societe Anonyme: Poclain Ram with two-part piston rod
US4257731A (en) * 1978-09-14 1981-03-24 North Bend Fabrication & Machine, Inc. Powered implement with work elements pivotally mounted on an implement mounting and a torque tube for rotating such mounting
FR2501823A1 (fr) * 1981-03-13 1982-09-17 Ardennes Equipements Dispositif de fixation et d'alimentation d'un equipement hydraulique de manutention a un engin de levage
FR2546150A1 (fr) * 1983-05-17 1984-11-23 Clerc Georges Accessoire d'appareil de levage formant grappin
US4497608A (en) * 1983-06-13 1985-02-05 The Trustees Of The Toronto General Burying Grounds Monument foundation digger
DE9407263U1 (de) * 1994-05-02 1994-07-07 Dolinsek Hans Greifvorrichtung mit integriertem Antrieb
US5375348A (en) * 1992-04-23 1994-12-27 Japanic Corporation Deep excavator
US5649377A (en) * 1993-05-05 1997-07-22 Tanada; Katsunori Multipurpose bucket structure
US5836089A (en) * 1993-02-22 1998-11-17 Lipsker; Yitshaq Excavating equipment fitted with surface clamps
US6347464B1 (en) * 1999-12-29 2002-02-19 Gene Klager Self-cleaning hydraulic clam bucket
US6517131B1 (en) * 2000-08-18 2003-02-11 Thomas Haataja Suspended load rotary device
EP1518029A1 (en) * 2002-06-28 2005-03-30 1994 Weyer Family Limited Partnership Rotation tool and actuator
US20080016728A1 (en) * 2004-08-27 2008-01-24 Cole Technology Limited Boom Assembly
US20090199665A1 (en) * 2008-02-08 2009-08-13 Tappan James E floating collar clamping device for auto-aligning nut and screw in linear motion leadscrew and nut assembly
KR101331247B1 (ko) * 2012-02-03 2013-11-19 정동영 회전집게장치
US20150239713A1 (en) * 2012-09-25 2015-08-27 A Ward Attachments Limited Hydraulic Grapple
US20190292746A1 (en) * 2018-03-23 2019-09-26 Cashman Dredging And Marine Contracting, Co., Llc Slope-level-cut bucket
US11365098B2 (en) 2018-09-05 2022-06-21 Patrick Ybarra Grapple carriage

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5819080Y2 (ja) * 1979-10-03 1983-04-19 株式会社 ラクサ コップ等の溶器保持具
DE3105194A1 (de) * 1981-02-13 1982-09-09 Heinz Thumm Ölhydraulische Antriebe GmbH, 7012 Fellbach Drehvorrichtung fuer haengende lasten
JPH0635722B2 (ja) * 1988-11-10 1994-05-11 彦間製作所 回転可能なクラムシェルバケットの制御回路
DE3843753A1 (de) * 1988-12-24 1990-06-28 Schaeff Karl Gmbh & Co Baggerarm
DE4006478C2 (de) * 1990-03-02 1999-02-18 Klaus Wolf Hilfsgerät zum Betätigen von Absperrschiebern
DE29700491U1 (de) * 1997-01-14 1997-03-13 Buemach Engineering Internatio Universalantrieb für Greifer
DE502007001118D1 (de) 2007-01-26 2009-09-03 Bauer Maschinen Gmbh Bodenabtragsvorrichtung
DE202015005202U1 (de) * 2015-07-21 2016-10-24 Rolf Mieger Greifermechanik für den Greifer einer Baumaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3314709A (en) * 1964-03-25 1967-04-18 Poclain Sa Hydraulically operated mechanical grab
US3493135A (en) * 1968-03-08 1970-02-03 Bucyrus Erie Co Braked ball and socket support for bucket attachment
US3527495A (en) * 1968-04-03 1970-09-08 Northern Eng & Supply Co Ltd Grapple
US3727968A (en) * 1970-06-12 1973-04-17 Hitachi Ltd Lumber grabbing apparatus
US3759564A (en) * 1971-03-08 1973-09-18 Pierce Pacific Manuf Inc Grapple

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3314709A (en) * 1964-03-25 1967-04-18 Poclain Sa Hydraulically operated mechanical grab
US3493135A (en) * 1968-03-08 1970-02-03 Bucyrus Erie Co Braked ball and socket support for bucket attachment
US3527495A (en) * 1968-04-03 1970-09-08 Northern Eng & Supply Co Ltd Grapple
US3727968A (en) * 1970-06-12 1973-04-17 Hitachi Ltd Lumber grabbing apparatus
US3759564A (en) * 1971-03-08 1973-09-18 Pierce Pacific Manuf Inc Grapple

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047313A (en) * 1975-02-10 1977-09-13 International Harvester Company Convertible grab bucket
US4005895A (en) * 1975-11-17 1977-02-01 Cullings Harold L Rotational grapple
US4218960A (en) * 1976-07-05 1980-08-26 Societe Anonyme: Poclain Ram with two-part piston rod
US4257731A (en) * 1978-09-14 1981-03-24 North Bend Fabrication & Machine, Inc. Powered implement with work elements pivotally mounted on an implement mounting and a torque tube for rotating such mounting
FR2501823A1 (fr) * 1981-03-13 1982-09-17 Ardennes Equipements Dispositif de fixation et d'alimentation d'un equipement hydraulique de manutention a un engin de levage
FR2546150A1 (fr) * 1983-05-17 1984-11-23 Clerc Georges Accessoire d'appareil de levage formant grappin
US4497608A (en) * 1983-06-13 1985-02-05 The Trustees Of The Toronto General Burying Grounds Monument foundation digger
US5375348A (en) * 1992-04-23 1994-12-27 Japanic Corporation Deep excavator
US5836089A (en) * 1993-02-22 1998-11-17 Lipsker; Yitshaq Excavating equipment fitted with surface clamps
US5649377A (en) * 1993-05-05 1997-07-22 Tanada; Katsunori Multipurpose bucket structure
DE9407263U1 (de) * 1994-05-02 1994-07-07 Dolinsek Hans Greifvorrichtung mit integriertem Antrieb
US6347464B1 (en) * 1999-12-29 2002-02-19 Gene Klager Self-cleaning hydraulic clam bucket
US6517131B1 (en) * 2000-08-18 2003-02-11 Thomas Haataja Suspended load rotary device
EP1518029A1 (en) * 2002-06-28 2005-03-30 1994 Weyer Family Limited Partnership Rotation tool and actuator
US20080016728A1 (en) * 2004-08-27 2008-01-24 Cole Technology Limited Boom Assembly
US7591089B2 (en) * 2004-08-27 2009-09-22 Cole Technology Limited Boom assembly
TWI460362B (zh) * 2008-02-08 2014-11-11 Lam Res Corp 於直線運動導螺與螺帽組件中用來自動對準螺帽與螺桿之浮動套環夾持裝置
US20090199665A1 (en) * 2008-02-08 2009-08-13 Tappan James E floating collar clamping device for auto-aligning nut and screw in linear motion leadscrew and nut assembly
US8438712B2 (en) * 2008-02-08 2013-05-14 Lam Research Corporation Floating collar clamping device for auto-aligning nut and screw in linear motion leadscrew and nut assembly
CN101970905B (zh) * 2008-02-08 2013-07-31 朗姆研究公司 一种用于线性运动导螺杆和螺母总成中螺母和螺丝自动对准的悬置轴环夹持装置
KR101331247B1 (ko) * 2012-02-03 2013-11-19 정동영 회전집게장치
US20150239713A1 (en) * 2012-09-25 2015-08-27 A Ward Attachments Limited Hydraulic Grapple
US20190292746A1 (en) * 2018-03-23 2019-09-26 Cashman Dredging And Marine Contracting, Co., Llc Slope-level-cut bucket
US10480153B2 (en) * 2018-03-23 2019-11-19 Cashman Dredging And Marine Contracting, Co., Llc Slope-level-cut bucket
US10900195B2 (en) 2018-03-23 2021-01-26 Cashman Dredging And Marine Contracting, Co., Llc Slope-level-cut bucket
US11365098B2 (en) 2018-09-05 2022-06-21 Patrick Ybarra Grapple carriage

Also Published As

Publication number Publication date
GB1426133A (en) 1976-02-25
FR2226353B1 (ko) 1977-02-04
DE2413200C3 (de) 1978-09-21
JPS50605A (ko) 1975-01-07
BE812128A (fr) 1974-07-01
BR7402653D0 (pt) 1974-10-29
AR204917A1 (es) 1976-03-19
JPS537042B2 (ko) 1978-03-14
ES425476A1 (es) 1976-07-01
FR2226353A1 (ko) 1974-11-15
DE2413200A1 (de) 1974-11-21
IT1011667B (it) 1977-02-10
DE2413200B2 (de) 1978-02-16

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