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
  • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
  • E02F3/402—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors
  • E02F3/404—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with means for facilitating the loading thereof, e.g. conveyors comprising two parts movable relative to each other, e.g. for gripping
• • 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
  • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
  • E02F3/962—Mounting of implements directly on tools already attached to the machine

Definitions

• This invention relates to a bucket assembly for excavators or loaders, comprising, in addition to a virtual bucket portion, a gripping tool arranged to grip, at need, arbitrary objects such as poles, pillars, beams or the like and hold them in relation to the bucket.
• a bucket assembly of this type solely intended for loaders is previously known by the British patent specification 1 070 877 which discloses a gripping tool having two claws or claw-like arms which are mounted for pivoting movements towards and away from each other while forming a jaw of variable size for receiving the object.
• These two claw arms are comparatively long and mounted directly upon the top surface of the bucket portion in such a way that a large portion of each arm always juts out from the upper edge of the bucket portion.
• the present invention aims at eliminating the above mentioned limitations in the bucket assembly previously known and render the same useful more all-round while increasing the working life thereof at the same time.
• this is achieved by the fact that the gripping tool is built into a suitably box-like protective housing into which the tool, through an opening, may be inserted to an inactive, protected position permitting the use of the bucket assembly for digging purposes without hindrance of the gripping tool and out of which the tool may be brought to an active position in which it is capable of gripping said objects
• the bucket assembly may with particularly great advantage first of all be used for digging a pit in the ground and immediately thereafter grip a telephone or cable pole and place the same in the pit digged.
• the object may on one occasion get to the left and on the other occasion to the right in relation to the center of the bucket; involving working conditions which are difficult to master for the operator who, when it is a question of for instance mounting of telephone poles in ground pits digged by means of the bucket, is dependent on a precise alignment of the pole in the mark pit digged.
• the invention proposes that the claws, through suitable connecting means, are connected to a control mechanism being common to both of the claws, said mechanism in operation always transmitting substantially uniform control movements to the two claws while securing an automatic centration of an object being present therebetween.
• FIG. 1 is a partially simplified perspective, view of a bucket assembly according to the invention as viewed obliquely from the front, Fig. 2 a horizontal section through the assembly of Fig. 1 the gripping tool in question being shown in its inactive position and Fig. 3 a similar section showing the gripping tool in the active position.
• a bucket for an excavator is generally designated 1 in
• Fig. 1 In the conventional manner the bucket is designed with a bottom piece 2 extending obliquely upwardly-forwardly, a front piece 3, two side pieces 4 and a top piece 5.Backwardly the bucket has a mouth designated 6 which is not visible in the drawing.
• the bucket has an attachment generally designated 7 which in a suitable manner may be connected to the free end of the arm of the excavator (not shown) in relation to which the bucket is pivotable in the usual manner.
• the bucket or bucket portion 1 comprises a gripping tool generally designated 9 which in the example shown consists of two claws 10, 11 which are hingedly mounted relative to the bucket and which are pivotable towards and away from each other while forming a jaw of variable size. More precisely the gripping tool 9 is located in the upper part of the bucket 1 with the gripping claws 10, 11 directed substantially forwardly from the bucket, or in other words directed substantially diametrically opposed to the above-mentioned mouth 6 in the bucket.
• the gripping tool 9 is built into a protective housing in the form of a box 12 which may be mounted as a unit in or on the bucket.
• the bucket may either be a bucket which is already manufactured and in use or a newlyproduced bucket.
• the box 12 is completely closed except for the opening designated 8 through which the two claws 10, 11 forming the tool 9 are movable between their active and inactive positions respectively.
• Fig. 1 it is shown how the two claws 10, 11 are pivotable each about a vertical hinge or shaft 13 and 14 respectively extending between the top and the bottom of the box 12, said shafts suitably being easy to dismount, e.g. by means of Seegerrings (not shown).
• the claw 10 comprises two members or halves 15, 16 which are rather distantly spaced along the shaft 13 and between which the other claw 11 may in its entirety be inserted upon pivoting the claws towards each other.
• the claw 11 is composed of two interspaced members 17, 18, what gives a good gripping and holding capability in connection with long objects which are located between the claws parallel to the shafts 13, 14.
• Fig. 3 appears how the gripping surfaces 27 of the claws or claw members are of arcuate shape having a gradually increasing radius in the direction of the free ends of the claws. In this way one obtains a favourable grip of objects 28, e.g. poles, having highly varying sectional sizes.
• piston-cylinder mechanism 22 in the conventional manner advantageously may be equipped with so called hose breakage valves, i.e. safety valves which guarantee that the piston rod 21 remains in a settled position in which the gripping tool maintains its grip of the object in question even in the event of breakage or leakage occuring in anyone of the conduits 25, 26.
• hose breakage valves i.e. safety valves which guarantee that the piston rod 21 remains in a settled position in which the gripping tool maintains its grip of the object in question even in the event of breakage or leakage occuring in anyone of the conduits 25, 26.
• the bucket described operates in the following way.
• the claws 10, 11 are kept inserted in the interior of the bucket or the box 12 in the inactive position shown in Fig. 2.
• the claws do not form any obstacle whatsoever for the bucket during the digging work thereof.
• the insertion of the claws is taken care of by the fact that the piston rod 21 is pushed into its innermost position and through the yoke 20 and the links 19 this movement causes the claws to pivot about their respective shafts 13 . 14 to the positions shown in Fig. 2,
• an object e.g.
• the claws 10, 11 may be activated by pushing the piston rod out of its cylinder while extending the claws out of the shell-like exterior of the bucket to the position shown in Fig. 3» After this the object or pole 28 may be gripped between the claws 10, 11 by the piston rod 21 again being pulled into the cylinder what will have the result that the claws are pivoted and caused to contact the pole 28 while fastening the pole in the jaw formed by the claws. As indicated in Fig. 3 the pole 28 will also contact and abut the front portion of the bucket assembly or more precisely abut the elements which confine the front opening 8 of the protective box 12. In this condition the pole may easily be raised by pivoting or rotating the entire bucket relative to the excavator arm in a manner known per se until the pole has assumed a vertical position in which it is retained during the anchoring work.
• the invention is not limited merely to the embodiment described and shown in the drawings.
• the assembly of the invention is per se useful not only in connection with just excavators but also in connection with for instance loading machines using buckets.
• the invention may be used for gripping other objects than just light poles, e.g. pillars, beams, plates or other things.
• the gripping tool may also have another design than just the tool shown.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Shovels (AREA)
• Load-Engaging Elements For Cranes (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• Centrifugal Separators (AREA)
• Earth Drilling (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20336918

Family Applications (1)

Country Status (10)

Cited By (3)

Families Citing this family (1)

Citations (3)

• 1979
  • 1979-01-03 SE SE7900040A patent/SE428138B/sv not_active IP Right Cessation
• 1980
  • 1980-01-03 DE DE8080900158T patent/DE3064341D1/de not_active Expired
  • 1980-01-03 FI FI800019A patent/FI64213C/fi not_active IP Right Cessation
  • 1980-01-03 WO PCT/SE1980/000001 patent/WO1980001393A1/en active IP Right Grant
  • 1980-07-14 EP EP80900158A patent/EP0023495B1/en not_active Expired
  • 1980-08-21 NO NO802484A patent/NO149781C/no unknown
  • 1980-09-01 DK DK371980A patent/DK155753C/da not_active IP Right Cessation
• 1984
  • 1984-05-07 SG SG360/84A patent/SG36084G/en unknown
  • 1984-06-14 HK HK486/84A patent/HK48684A/xx not_active IP Right Cessation
• 1985
  • 1985-12-30 MY MY522/85A patent/MY8500522A/xx unknown

Patent Citations (3)

Also Published As

Similar Documents

Legal Events