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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C13/00—Other constructional features or details
  • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
  • B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
• • 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

Definitions

• This invention relates to an apparatus for machines provided with a supporting part in the form of a preferably hydraulically operated lifting crane, the apparatus being intended to connect a load-carrying and/or a load-gripping par of the machine with the supporting part, and the load-carrying and/or the load-gripping part being able to be rotated and/or be tilted in relation to the supporting part.
• SE-patent publication 447.281 is such an apparatus previously known. Futhermore, this apparatus is so designed that the locking of the load-carrying part (dredger ladle) in relation to the lifting crane is made by means of roller-forme means which are intended to be brought into contact against partly a plate 48 which is fastened in that means which carrie the dredger ladle, partly the side plane of a gear wheel 30 which is used for giving the dredger ladle a turning movement. Due to the fact that the contact surface of the roller means against the means 30, 48 becomes very small, the locking of th dredger ladle in relation to the lifting crane can be unsatis- factory during heavy and arduous dredging works.
• the operation of the contact means (roller means) 44, 46 is circum stantial, because this operation is made by means of an essen ⁇ tially triangular plate which by the effect of an excenter is intended to be brought into engagement with the shaft of roller-formed means.
• the triangular plate When the triangular plate is into contact with the shaft the plate is blocked by a pin which is intro ⁇ quizd into a hole in the plate. Due to the fact that the known apparatus has the design which has been described above, the overall height of the apparatus becomes relatively large which has the consequence that the apparatus becomes sensitive for the great strains arising during for instance dredging works.
• This invention intends to eliminate the drawbacks with known technique and offer an apparatus which is so made that the load-carrying and/or the load-gripping part can be locked in an extremely secure way in relation to the lifting crane during dredging works or the like. Moreover, due to its design the apparatus gets a very low overall height, wherefore it becomes relatively unsensitive to the strains arising during heavy working operations. Another essential advantage with a low overall height of an apparatus connecting the supporing part of a machine with a load-carrying and/or a load-gripping part of the machine is that the motion geometry of the last mentioned part is only changed to a minimum. Due to that fact the apparatus according to the invention can remain stationari- ly in the machine.
• an apparatus of the kind mentioned by way of introduction which is characterized in that it comprises a wheel which is rotatably arranged in the appara- tus and has a rim-formed part going round the wheel at its peripheral portion, the wheel being intended to be connected with the load-carrying and/or the load-gripping part, that the rim-formed part has a first, essentially plane portion which is intended to slide against a first essentially plane portion of a stationary, plate-like means in the apparatus, and that the apparatus is so made that the wheel can be locked in relation to the plate by means of at least two brake blocks, which are intended to force the wheel and the plate to a frictional en ⁇ gagement with each other. Due to that fact an extremely secure locking of the rotatable wheel in relation to the stationary plate is obtained. Furthermore, proper journalled surfaces are obtained between the rotatable wheel and the stationary plate, which journalled surfaces eliminate play.
• Fig. 1 shows a side view of the apparatus, having an upper part and a lower part intended to be fastened to a load- carrying and/or a load-gripping part
• Fig. 2 shows a section along the line II-II of Fig. 3
• fig. 3 shows the apparatus according to Fig. 2 seen from above
• Fig. 4 shows the apparatus according to Fig. 2 seen from below and partly cut up
• Fig. 5 shows a braking means according to the invention
• Fig. 6 shows a section along the line VI-VI of Fig. 5.
• Fig. 1 is shown there the new apparatus which is intended to connect a load-carrying and/or a load- gripping part, which for instance can comprise a dredging ladle, with a supporting part which can comprise the lifting crane in a machine.
• This apparatus compises an upper part 1 intended to be fastened to the lifting crane and a lower part on which the dredging ladle is intended to be fastened.
• This lower part 2 comprises a quick coupling device and is rotatabl arranged in relation to the upper part 1 and by that the lifting crane. This rotatability of the lower part in relation to the upper part has been made possible by the fact that the part 2 is fastened on the underside of a plate.3 (see Figs.
• a driving motor which in this case comprises a hydraulic motor 5.
• a hydraulic motor it would be possible to utilize an electric motor.
• an output shaft from the hydraulic motor provided with a chain wheel 6 which via a chain 7 drives the teeth-provided wheel 4.
• the upper part 1 of the apparatus is on its underside provided with a protection cover 8 which is tightened against the rotatable plate 3 whereby pollutions shall be prevented to penetrate the inner space of the upper part 1.
• the wheel 4 is prefarably made of steel and has a rim- formed part 9 at its periphery.
• the upper side of this part 9 has, as the apparatus is shown in the Figure in direction to the periphery of the wheel, a relatively large and essentially plane, horizontal portion 10, which passes over to an essen ⁇ tially plane, vertical portion 11, which in its turn passes over to an essentially plane, horizontal portion 12, positione on a higher level than the portion 10.
• a relatively large and essentially plane, horizontal portion 10 which passes over to an essen ⁇ tially plane
• vertical portion 11 which in its turn passes over to an essentially plane, horizontal portion 12, positione on a higher level than the portion 10.
• right out on the wheel 4, radially seen, are the teeth 13 arranged.
• the underside of the rim-formed part 9 comprises in the direction towards the periphery of the wheel an essentially plane, horizontal portion 10 which passes over to an essential ly plane vertical portion 15 extending down to the upper side of the plate 3 and passes over to an essentially plane, hori- zontal portion 16 which comprises the contact surface of the wheel 4 against the upper side of the plate 3.
• connection line between the portions 10 and 14 is essentially vertical while the connection line between the portion 14 and the portion 15 extends obliquely downwards. Due to that fact is formed there a transition portion 17 which widens itself in direction towards the periphery of the wheel.
• the upper side of the rim-formed part 9 of the wheel 4 is intended to slide against a stationary, plate-like means (18A) in the apparatus which means is preferably made of steel and has a centrally arranged hole, whereby a rim-formed part 18B is formed at the peripheral part of the plate 18A.
• the peripheral part 18B of the plate has such a design that in a smoothly way it can cooperate with the upper side of the rim-formed part 9 of the wheel 4.
• the peripheral part of the plate 18A has one in relation to the portion 19 above-positioned, essentially plane horizontal portion 22 which in direction towards the periphery of the plate 18A passes over to an essentially plane, vertical portion 23.
• the inner connection line between the portions 19 and 22 is essentially vertical while the connection line between the portion 22 and the portion 23 extends oblique- ly upwards. Due to that fact is formed there a transition por ⁇ tion 24 which widens itself in direction towards the periphery of the plate 18A.
• the portions 10, 12, 14, 16 of the wheel 4 and the portions 19, 21, 22 of the plate 18A are directed essentially radially, while the portions 11, 15 of the wheel 4 and the por ⁇ tions 20, 23 of the plate 18A are directed essentially axially.
• the distance between the portions 19 and 22 of the plate 18A is essentially the same as the distance between the por ⁇ tions 10 and 14 of the wheel 4. This fact facilitates the locking of these two means to each other.
• projections 25, 26 in the wheel and the plate which are directed inwards and essentially towards the centres of these ones and have an extension going round respective means 4, 18A
• the projections 25, 26 preferably comprise an integral part of the wheel 4 and the plate 18A, respectively.
• the wheel 4 In certain positions, for instance when dredging, when the apparatus is exposed to great strains the wheel 4 has to b locked in relation to the plate 18.
• This locking is made by means of two brake blocks 27, 28 which essentially have the form of a half-circle and which are arranged radially inside the rim-formed part 9; 18B of the wheel 4 and the plate 18A an are preferably made of steel.
• These brake blocks 27, 28 are intended to rest against each outside of the inwards-directed projections 25, 26 of the wheel 4 and the plate 18A.
• the locking of the wheel 4 against the plate 18A is made by means of two preferably hydraulically influenced plunger means of which only one 29 is shown in Fig. 4, which plunger means are intended to force the two brake blocks 27, 28 radially out ⁇ wards.
• the plunger means 29 are provided with spring means whic during normal rotation of the wheel 4 is intended to be com- pressed by the hydraulic pressure but which is intended to force the plunger out of the plunger means and by that the brake blocks 27, 28 when the hydraulic pressure is eliminated, whereby an unintentional rotation of the wheel 4 is prevented.
• the plunger of the plunger means and by that the brake blocks are influenced not only by the spring force of the spring means but also of the force from th hydraulic system of the machine.
• the brake blocks 27, 28 In order to be able to surround the projections 25, 26 the brake blocks 27, 28 have a recess 30 along its whole peri ⁇ phery. This recess has a width which somewhat exceeds the entire thickness of the projections 25, 26.
• the two radial re- striction portions 31, 32 of the recess are bevelled at their very front part. The reason why is that these bevellings shall cooperate with the transition portions 17, 24 which widen them ⁇ selves in the direction towards the periphery of the wheel 4 and the plate 18A, respectively.
• the plate 18A and the wheel 4 have a relatively small thickness.
• the brake blocks 27, 28 function as a journalled sur ⁇ face for the projection 25 of the wheel 4. Due to that fact the journalling of the wheel 4 is further improved at the same time as the risk of play is reduced.
• the number of brake blocks is two.
• the number of brake blocks can be three or more.
• the braking apparatus according to the invention can also be used for braking up a turning move ⁇ ment of the load-carrying and/or the load-gripping part in re ⁇ lation to the supporting part.
• the new apparatus can further comprise two hydraulic cylinders of which only one 33 is shown in Fig. 1. By means of these ones a dredging ladle or some other load-carrying and/or load-gripping means can be given a tilting movement. In that connection the tilting of the load-carrying and/or the load- gripping part plus the parts 1, 2 (see Fig. 1) is made in re- lation to the supporting part.
• the load-carrying and/or the load-gripping means does not need to be connected to the lower part 2 of the apparatus (see Fig. 1) but can of course be con ⁇ nected directly to the plate 3 at the underside of the upper part 1.
• parts of the apparatus are made preferably of steel. This steel material ought to be treated in such a way that material brake is pre ⁇ vented. Of course it is possible to manufacture the parts of another metallic material.
• the invention idea can also be utilized in a simpler version of a machine which has no hydraulic motor for driving the wheel 4.
• the turning of the load-carrying means, for instance a dredging ladle, in relation to the supporting part, i.e. the crane arm in for instance a dredging machine is made by putting down the dredging ladle into the ground and by changing the position of the crane arm in rela- tion to the dredging ladle.
• the new invention can of course be very useful in many areas, for instance as has been mentioned previously in dredg ⁇ ing machines.
• a dredging machine provided with the appara tus according to the invention it is possible to bring the dredging ladle of the machine in any direction which of course facilitates the dredging essentially.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mining & Mineral Resources (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Jib Cranes (AREA)
• Braking Arrangements (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20375598

Family Applications (1)

Country Status (4)

Families Citing this family (5)

Family Cites Families (8)

• 1989
  • 1989-04-07 SE SE8901244A patent/SE8901244D0/xx unknown
• 1990
  • 1990-04-09 EP EP90906397A patent/EP0466797A1/de not_active Withdrawn
  • 1990-04-09 AU AU54430/90A patent/AU5443090A/en not_active Abandoned
  • 1990-04-09 WO PCT/SE1990/000243 patent/WO1990012162A1/en not_active Application Discontinuation
  • 1990-11-16 SE SE9003664A patent/SE468219B/sv not_active IP Right Cessation

Non-Patent Citations (1)

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