EP0971076A1 - Bagger- und Zerkleinerungsgerät - Google Patents

Bagger- und Zerkleinerungsgerät Download PDF

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Publication number
EP0971076A1
EP0971076A1 EP98112894A EP98112894A EP0971076A1 EP 0971076 A1 EP0971076 A1 EP 0971076A1 EP 98112894 A EP98112894 A EP 98112894A EP 98112894 A EP98112894 A EP 98112894A EP 0971076 A1 EP0971076 A1 EP 0971076A1
Authority
EP
European Patent Office
Prior art keywords
breaker
adapter
arm
bucket
pin
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.)
Withdrawn
Application number
EP98112894A
Other languages
English (en)
French (fr)
Inventor
Yoshiharu Amano
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.)
Mazda Earth Technologies Co Ltd
Original Assignee
Mazda Earth Technologies Co Ltd
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 Mazda Earth Technologies Co Ltd filed Critical Mazda Earth Technologies Co Ltd
Priority to EP98112894A priority Critical patent/EP0971076A1/de
Publication of EP0971076A1 publication Critical patent/EP0971076A1/de
Withdrawn legal-status Critical Current

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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
    • E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • 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
    • 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
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • 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
    • E02F3/966—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of hammer-type tools

Definitions

  • This invention relates to a digging & breaking apparatus to be attached to a power shovel and the like.
  • One of the digging and breaking apparatus is to enable selective attachment of a bucket and a breaker to a attaching portion of a leading end of an arm for allowing either one of a digging operation and a breaking operation at a time.
  • Another type of the digging and breaking apparatus has a breaker permanently attached to an arm and a bucket detachably attached to the arm for the breaking operation.
  • an apparatus having a bucket cylinder pivotally provided in a forward surface of an arm, a bucket, provided at a lead end of the arm, rotated via a first four bar linkage mechanism upon receiving the drive power from the bucket cylinder, a breaker, provided on the rear surface of the arm, that is rotated via second four bar linkage mechanism which is operatively connected to the first four bar linkage mechanism.
  • the breaker can be rotated to a retracted position in which the breaker lies along the longitudinal direction of the arm and be fixed onto the arm, thereafter, the second four bar linkage mechanism is dismounted for enabling the operation by the bucket.
  • a single bucket cylinder can be used to drive both the bucket and the breaker, thus enabling the avoidance of an increase of the parts in the drive mechanism.
  • the breaker is set to be rotated and the angle between the breaker and the arm can be adjusted upon arising the need during the breaking operation.
  • the operation of the breaker in accordance with the drive of the bucket cylinder is so different from the same for the bucket thus complicating the operations.
  • the removal of the second four bar linkage mechanism becomes necessary and when the breaking operation is to be conducted, the attachment of the second four bar linkage mechanism becomes necessary. As a result, this removal or attachment of the four bar linkage mechanism inconveniences the operation.
  • the digging and breaking apparatus comprises a bucket for a digging operation, a breaker for a breaking operation, an arm, an adapter rotatably mounted on the arm, and a drive unit for rotating the adapter characterized in that the bucket and the breaker are mounted on the adapter; in that the angle between the arm and the breaker is adjustable by rotating the adapter during the breaking operation; and in that the breaker and the bucket are so positioned with respect to each other that the breaking operation is performed by the breaker without detaching the bucket from the adapter.
  • the bucket is tilted by rotating the adapter via the drive unit at the time of digging operation by the bucket.
  • the breaker's angle to the arm can be adjusted by rotating the adapter via the drive unit.
  • the breaker is rotated along with the adapter by the drive unit, simplifying the operation of the breaker.
  • the breaker and the bucket are so positioned that the bucket does not interfere with the operation of the breaker and the angle adjustment of the breaker with respect to the arm.
  • Figs. 1 to 4 show a digging & breaking apparatus of a power shovel as a first embodiment of this invention.
  • a reference numeral 1 is an arm that is pivotally connected to a leading end of a boom 2 via a pivot shaft 3.
  • the boom 2 at its base end is rotatably connected to a main body of a power shovel 4 via a pivot shaft 5.
  • a hydraulic cylinder (as a boom cylinder) 7 is provided between the main body of the power shovel 4 and the boom 2 to rotate the boom 2 with respect to the main body of the power shovel 4.
  • Another hydraulic cylinder (as an arm cylinder) 6 is provided between the boom 2 and the arm 1 to rotate the arm 1 with respect to the boom 2.
  • an adapter 8 is pivotally provided via a pivot shaft 9.
  • This adapter 8 is rotated by the hydraulic cylinder 10 and a link mechanism 11 as a drive unit.
  • the link mechanism 11 includes a pair of links 12, 13 that are pivotally connected to each other via a pin 14 and an end of one link 12 is pivotally connected to the lead end of the arm 1 via a pin 15 and an end of the other link 13 is pivotally connected to the adapter 8 via a pin 16.
  • the hydraulic cylinder 10 is connected between the pin 14 of the link mechanism 11 and the middle portion of the arm 1.
  • the adapter 8 is attached with a bucket 20 for a digging operation and a breaker 30 for a breaking operation.
  • the bucket 20 is fixedly connected to the adapter 8 via a bucket bracket 21.
  • the breaker 30 is connectable to the adapter in a connecting state where the adapter 8 and the breaker 30 are integrally movable and in a disconnecting state where relative movement of the breaker 30 with respect to the adapter 8 is permitted.
  • a fixing unit is provided to the arm 1 for fixing the breaker 30 onto the arm 1 when the breaker 30 is in the disconnecting state.
  • the breaker 30 is put into the connecting state.
  • the angle between the arm 1 and the breaker 30 can be adjusted by rotating the adapter 8 and moreover the breaker 30 and the bucket 20 are so positioned to each other that the breaking operation is carried out by the breaker 30 without further operation to the bucket 20.
  • a rotation restrictor is provided in between the link mechanism 11 and the adapter 8 for allowing the switch-over of the rotation range between a first range and a second range.
  • the adapter 8 has a pair of side walls 8a, 8b spaced apart from each for encasing the arm 1 forming an arm side portion, another pair of side walls 8c, 8d narrowly spaced each other than the side walls 8a, 8b, forming an operation side portion and an intermediate plate 8e connecting these side portions.
  • a pivot shaft insertion hole 22 is formed on one side of the arm side portion of the adapter 8 and on the other side thereof, a first and a second connecting holes 23, 24 are formed.
  • the adapter 8 is pivotally connected to the arm 1 via the pivot shaft 9 being inserted to the pivot shaft insertion hole 22. Moreover, when the pin 16 is selectively inserted to either one of the connecting holes 23, 24, the link 13 is pivotally connected to the adapter 8.
  • the aforementioned first and second connecting holes 23, 24 and the pin 16 for a pivotal connection form the rotation restrictor.
  • a range of the maximum angular displacement of the adapter 8 by operating the hydraulic cylinder 10 when the pin 16 is placed in the first connecting hole 23 is set as a first rotation range that is greater than a second rotation range of the adapter 8 when the pin 16 is placed in the connecting hole 24.
  • the breaker 30 is permitted to rotate with respect to the arm 1 to the retracted position (indicated by a phantom line in Fig.
  • the breaker 30 is not permitted to rotate to the retracted position, i.e., the maximum movable limit position (as indicated by a phantom line in Fig. 4) falls short to the retracted position thereby prohibiting the rotation of the breaker 30 to the retracted position.
  • a bracket 21 extending from the bucket 20 is fixed to the adapter 8 by inserting the fixing pin 26 to the respective bucket mounting holes 25.
  • the engaging groove 28 is shaped in an arc with an arc center corresponding to the pivot shaft insertion hole 22 of the adapter 8.
  • the breaker 30 has a breaker main body 31 with a power source therein and a chisel 32 that is detachably attached to the leading end of the breaker main body 31.
  • the pair of brackets 33 are connected by plural bolts 34 and nuts 34a at the position corresponding to the lead end side and tail end side of the breaker main body 31 in such a manner that the brackets 33 are opposingly arranged to each other for placing the bracket main body 31 therebetween.
  • Hoses 35 are plugged to the breaker main body 31 for supplying a hydraulic pressure to the power source in the breaker main body 31 in case the breaker 30 is a hydraulically operated type.
  • a pin mount hole 36 On the bracket 33 at its one side portion in the tail end, there is formed a pin mount hole 36 corresponding to the pin mount hole 27 of the adapter 8 for connecting the bracket 33 to the adapter 8 and a pin mount hole 37 for disengagement of the bracket 33 from the adapter 8.
  • the pin mount hole 36 is distanced away from the pin mount hole 37 by a certain dimension.
  • an engaging pin mount hole 38 On the other side portion of the bracket 33 in the tail end thereof, there is formed an engaging pin mount hole 38 in which an engaging pin 39 is fixed, that is used for connection with the engaging groove 28 of the adapter 8.
  • a chisel mount hole 40 is formed at the lead end of the breaker main body 31.
  • a bracket 41 having a pin mount hole 42 is provided on the lower surface of the lead end of the arm 1 at a position corresponding to the pin mount hole 37 when the breaker 30 is disengaged from the adapter 8 and is in the retracted position.
  • a connecting state of the breaker 30 to the adapter 8 where the breaker 30 is integrally rotatable with the adapter 8 is realized when the connecting pin 43 pierces the pin mount hole 27 of the adapter 8 and the pin mount hole 36 of the bracket 33 of the breaker 30 respectively and the engaging pin 39 fixed in the engaging pin mount hole 38 of the bracket 33 is fitted in the engaging groove 28 of the adapter 8.
  • a disconnecting state of the breaker with respect to the adapter 8 where the breaker 30 is free from the adapter 8 is realized when the connecting pin 43 is removed from the pin mount holes 27, 36 to be placed into the pin mount holes 37, 42 of the bracket 33 of the breaker 30 and the bracket 41 of the arm 1 and the engaging pin 39 is released from the engaging groove 28 of the adapter 8. This is how the connecting unit is constructed.
  • a fixing unit having a pivotal fix member 45, and a spring 46 as a bias member is provided on the lower surface of the base end of the arm 1.
  • An upper end of the fix member 45 is connected to a pivot shaft 47 that is pivotally connected to a bracket 48 provided lower side of the arm 1.
  • the fix member 45 is pivotable around the pivot shaft 47 between an upright posture in which the fix member 45 is perpendicularly arranged with respect to the lower surface of the arm 1 (as indicated by a solid line in Fig. 9) and an inclined posture in which the fix member 45 is inclined rearward to disengage from the lead end of the breaker 30 (as indicated by a phantom line in Fig. 9).
  • a projection 49 to be engaged with the chisel mount hole 40 of the breaker main body 31 is provided on one side of the fix member 45.
  • the projection 49 has a sloped surface 50 on its lower end in such a manner that the projection 49 is automatically placed into the chisel mount hole 40 as the breaker 30 is put in the retracted position where the breaker lies along the lower side of the arm 1.
  • an operation piece 45a is extended from the lower end of the fix member 45.
  • the spring 46 is provided in between the fix member 45 and an opposingly arranged spring base plate 51 and is retained by the shaft 52 mounted on the spring base plate 51.
  • the spring 46 is set to bias the fix member 45 towards its upright posture.
  • the upright posture of the fix member 45 is supported by a stopper 53 as shown in Fig. 9.
  • the movement of the engaging pin 39 due to the relative rotation of the breaker 30 to the adapter 8 is an arc of a center corresponding to the connecting pin 43 (the pin mount holes 27 & 36); however, the engaging groove 28 is designed in the form of arc of a center corresponding to the pivot shaft insertion hole 22.
  • the moving path of the engaging pin 39 is different from the arc path of the engaging groove 28, thus the engaging pin 39 does not come off from the engaging groove 28 due to the relative rotation, if any, of the breaker 30 with respect to the adapter 8. In this way, the breaker is securely held by the adapter 8.
  • the adapter 8 and the breaker 30 are integrally driven by the operation of the hydraulic cylinder 10.
  • the breaker 30 is rotated with respect to the arm 1; for instance, the breaker 30 is oriented in a downwardly facing posture as shown by the solid line for digging operation.
  • the breaker's working position can be adjusted as shown in a phantom line pl by changing the angle of the boom 2 and the angle of the arm 1 with respect to the ground upon operating the boom cylinder 7 and the arm cylinder 6.
  • the breaker's angle with respect to the arm 1 can be adjusted by the hydraulic cylinder 10.
  • the chisel 32 at the lead end of the breaker 30 is dismounted and the breaker 30 is being rotated to its retracted position as indicated by the phantom line in Fig. 2.
  • the lead end of the breaker 30 is automatically engaged with the fix member 45 provided under the arm 1.
  • the pin mount hole 37 of the bracket 33 of the breaker 30 is at the same position as the position of the pin mount hole 42 of the bracket 41 of the arm 1, then the connecting pin 42 is replaced for the pin mount holes 37 & 42.
  • the breaker 30 is fixed to the arm 1 by the connecting pin 43 used for the pin mount holes 37 & 42 and the fix member 45. Then the adapter 8 is driven to away from the breaker 30, causing the connecting pin 39 to slide along the engaging groove 28 that is in the arc shaped with a center corresponding to the pivot shaft insertion hole 22 (a rotation center of the adapter 8)to disengage the breaker 30 from the adapter 8.
  • the pin 16, used for connection of the lower end of the link 13 to the adapter 8 is replaced to the second connecting hole 24 from the first connecting hole 23, then the adapter 8 and the bucket 20 are driven by the hydraulic cylinder 10 for the digging operation.
  • the rotation range of the adapter 8 is limited to the second rotation range as described in the foregoing section so that the sand, soil and the like shoveled in the bucket 20 will not interfere with the breaker 30 at its limit position indicated by a phantom line as shown in Fig. 4.
  • the pin 16 is replaced back to the first connecting hole 23 of the adapter 8 to expand the rotation range (to the first rotation range) so that the adapter 8 is rotated to the retracted position where the pin mount hole 27 of the adapter 8 correspond to the pin mount hole 36 of the bracket 33 and the engaging groove 28 of the adapter 8 corresponds to the engaging pin 39 thus the pin 43 is placed in the pin mount holes 27 & 36 to complete the engagement of the breaker 30 to the adapter 8.
  • the lead end of the breaker 30 is disengaged from the fix member 45 and the chisel 32 is mounted back to the lead end of the breaker 30 to enable the breaking operation.
  • a digging and breaking apparatus comprising a bucket for a digging operation, a breaker for a breaking operation, an arm, an adapter rotatably mounted on the arm, and a drive unit for rotating the adapter.
  • the apparatus is characterized in that the bucket and the breaker are mounted on the adapter; the angle between the arm and the breaker is adjustable by rotating the adapter during the breaking operation; and the breaker and the bucket are so positioned with respect to each other that the breaking operation is performed by the breaker without detaching the bucket from the adapter.
  • the bucket is tilted by rotating the adapter via the drive unit at the time of digging operation by the bucket.
  • the breaker's angle to the arm can be adjusted by rotating the adapter via the drive unit.
  • the breaker is rotated along with the adapter by the drive unit, simplifying the operation of the breaker.
  • the breaker and the bucket are so positioned that the bucket does not interfere with the operation of the breaker and the angle adjustment of the breaker with respect to the arm.
  • the apparatus as described may further include a connecting unit enabling a selection between a connecting state where the breaker is fixedly mounted onto the adapter and a disconnecting state where the breaker is free from the adapter and a fixing unit provided on the arm for fixing the breaker onto the adapter when the breaker is in the disconnecting state.
  • the connecting unit preferably includes a connecting pin, a pair of pin insertion holes, for use in the connecting state, one is formed in the breaker and the other is formed at the corresponding position in the adapter and another pair of pin insertion holes, one is formed in the breaker and the other is formed at the corresponding position in the arm, for use in the disconnecting state and the breaker is fixedly connected to the adapter when the connecting pin pierces the first pair of pin insertion holes and the breaker is disengageable from the adapter when the connecting pin pierces the second pair of pin insertion holes.
  • the switching operation between the connecting state and the disconnecting state of the breaker can be easily performed by merely selecting the inserting holes by the connecting pin.
  • the fixing unit preferably includes a fixing member being pivotable between the engaging position of the breaker where the breaker, lying along the arm, is fixed onto the arm in the retracted position and the non-engaging position of the breaker and a biasing member for biasing the fixing member to the engaging position.
  • the above apparatus preferably has a rotation restrictor for allowing the selection of the rotation of the adapter with respect to the arm between a first rotation range in which the breaker is allowed to rotate up to its retracted position and a second rotation range in which the breaker is prohibited from rotating to its retracted.
  • the breaker is put to the retracted position when the adapter is selected to rotate in the first rotation range, thus the fixation and release of the breaker to/from the arm can be easily done.
  • selection of the rotation range of the adapter to be the second rotation range prevents soil, sand, and the like on the bucket from interfering with the breaker.
  • the drive unit preferably includes a link mechanism pivotally connected to the adapter via a pivot pin and a cylinder for rotating the adapter via the link mechanism and the above rotation restrictor is preferably included with a first hole and a second hole formed in the adapter and the pivot pin is selectively inserted to one of the first and the second holes to allow selection of the rotation of the breaker with respect to the arm between in the first rotation range and in the second rotation range.
  • the chisel 32 is dismounted from the breaker main body 31 when fixing the breaker 30 in the retracted position to the arm 1; however, the chisel 32 may be kept with the breaker 30 when the arm 1 is designed to be long enough such that the chisel 32 mounted to the breaker main body 31 in the retracted position does not interfere with the movement of the boom 2.
  • the fix member 45 is set to engage the portion of the breaker main body 31 other than the chisel mount hole 40 in the aforementioned embodiment.
  • rotation ranges of the adapter 8 are controlled by selecting the pin connection position between the first connecting hole 23 and the second connecting hole 24 of the adapter 8; however, this may be done by adjusting the operation of the rotation of the bucket 20 at the time of digging operation.

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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)
  • Shovels (AREA)
EP98112894A 1998-07-10 1998-07-10 Bagger- und Zerkleinerungsgerät Withdrawn EP0971076A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98112894A EP0971076A1 (de) 1998-07-10 1998-07-10 Bagger- und Zerkleinerungsgerät

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98112894A EP0971076A1 (de) 1998-07-10 1998-07-10 Bagger- und Zerkleinerungsgerät

Publications (1)

Publication Number Publication Date
EP0971076A1 true EP0971076A1 (de) 2000-01-12

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EP98112894A Withdrawn EP0971076A1 (de) 1998-07-10 1998-07-10 Bagger- und Zerkleinerungsgerät

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2435653B (en) * 2006-03-01 2011-03-16 Gareth John Thomas Excavator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1172537A (en) * 1966-09-30 1969-12-03 Horace Briden Improvements in or relating to Material Cutting-Breaking, or -Moving Machines
FR2194849A1 (de) * 1972-08-01 1974-03-01 Guibbert Jean
US3915501A (en) * 1974-11-22 1975-10-28 Caterpillar Tractor Co Mounting arrangement for impact rock-breaker
FR2268121A2 (en) * 1974-04-16 1975-11-14 Guibbert Jean Drill attachment for excavator - has hydraulic feed pipe to drill connected to jib
US4087010A (en) * 1977-01-31 1978-05-02 Stormon Harry J Apparatus for mounting a hand-held paving breaker on backhoe attachments
US4466494A (en) * 1982-08-25 1984-08-21 J. I. Case Company Implement with gripping arm assembly for a backhoe
WO1992020875A1 (en) * 1991-05-18 1992-11-26 Webster Equipment Limited Mechanism for supporting an earthworking etc. tool

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1172537A (en) * 1966-09-30 1969-12-03 Horace Briden Improvements in or relating to Material Cutting-Breaking, or -Moving Machines
FR2194849A1 (de) * 1972-08-01 1974-03-01 Guibbert Jean
FR2268121A2 (en) * 1974-04-16 1975-11-14 Guibbert Jean Drill attachment for excavator - has hydraulic feed pipe to drill connected to jib
US3915501A (en) * 1974-11-22 1975-10-28 Caterpillar Tractor Co Mounting arrangement for impact rock-breaker
US4087010A (en) * 1977-01-31 1978-05-02 Stormon Harry J Apparatus for mounting a hand-held paving breaker on backhoe attachments
US4466494A (en) * 1982-08-25 1984-08-21 J. I. Case Company Implement with gripping arm assembly for a backhoe
WO1992020875A1 (en) * 1991-05-18 1992-11-26 Webster Equipment Limited Mechanism for supporting an earthworking etc. tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2435653B (en) * 2006-03-01 2011-03-16 Gareth John Thomas Excavator
US8689470B2 (en) 2006-03-01 2014-04-08 Gareth John Thomas Excavator

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