EP3040482A1 - Schnellkupplung für baumaschine - Google Patents

Schnellkupplung für baumaschine Download PDF

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Publication number
EP3040482A1
EP3040482A1 EP13892160.6A EP13892160A EP3040482A1 EP 3040482 A1 EP3040482 A1 EP 3040482A1 EP 13892160 A EP13892160 A EP 13892160A EP 3040482 A1 EP3040482 A1 EP 3040482A1
Authority
EP
European Patent Office
Prior art keywords
wedge
hydraulic cylinder
rod
quick coupler
construction machine
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Withdrawn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
EP13892160.6A
Other languages
English (en)
French (fr)
Other versions
EP3040482A4 (de
Inventor
Jin-Young Jung
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.)
Volvo Construction Equipment AB
Original Assignee
Volvo Construction Equipment AB
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 Volvo Construction Equipment AB filed Critical Volvo Construction Equipment AB
Publication of EP3040482A1 publication Critical patent/EP3040482A1/de
Publication of EP3040482A4 publication Critical patent/EP3040482A4/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Withdrawn legal-status Critical Current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
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/364—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat using wedges
    • 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
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • E02F3/3627—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a longitudinal locking element

Definitions

  • the present invention relates to a quick coupler for a construction machine. More particularly, the present invention relates to such a quick coupler for a construction machine in which first and second wedges, a hydraulic cylinder, and a rod are moved within a preset range for the replacement or the installation and removal of an attachment such as a bucket or a breaker so that the coupling and decoupling operation between the wedges and fastening pins can be performed in a secure and safe manner.
  • a construction machine such as an excavator is utilized to load and transport or crush earth and sand or wood on a construction site.
  • the construction machine is advantageous to the digging or the loading and transport.
  • the construction machine is suitable for crush the ground surface of a road or rocks and concrete.
  • the construction machine is configured to replace or assemble an arm or a bucket of the construction machine with attachments including various work apparatuses and option apparatuses so as to fit the use of a work required using a quick coupler.
  • the research and development on the quick coupler is in progress.
  • a quick coupler for a heavy construction machine is disclosed in Korean Patent Laid-Open Publication No. 2012-0071839 (laid-opened on July 3, 2012).
  • Fig. 1 is a schematic view showing a quick coupler for a heavy construction machine in accordance with the prior art.
  • a cylinder 3 for driving wedges 1 and 2 fastened to the attachment 4 is installed in the quick coupler 10, and the wedges 1 and 2 are installed at both sides of the cylinder 3, respectively.
  • the wedges 1 and 2 are moved by the drive of the cylinder 3 so as to be fastened to the attachment 4.
  • the quick coupler 10 is typically mounted at a front end portion of an arm, and the wedges 1 and 2 are moved by the articular motion of link members (not shown) connected to the cylinder 3 for the coupling and fixing of the wedges to a pair of opposed fastening pins 5.
  • the conventional quick coupler entails a problem in that it includes a plurality of link members, leading to complexity of a structure thereof.
  • a single lock type quick coupler in which one sides of the wedges are fixed is also used on a construction site.
  • a single lock type quick coupler encounters a problem in that one of two wedges is moved and coupled to one of the fastening pins in a state in which the other of two wedges is fixed to a main body of the quick coupler, and thus the coupling between the wedges and the fastening pins is performed incompletely.
  • the single lock type quick coupler has a disadvantage in that when any one of the wedges is decoupled from the fastening pin or the coupling between the wedges and the fastening pins is performed incompletely, a safety accident may occur.
  • the present invention has been made to solve the aforementioned problems occurring in the prior art, and it is an object of the present invention to provide a quick coupler for a construction machine in which the movement of first and second wedges and the movement of a hydraulic cylinder and a rod are effectively performed within a preset range for the replacement or the installation and removal of an attachment such as a bucket or a breaker so that the coupling and decoupling operation between the wedges and fastening pins can be performed in a secure and safe manner.
  • Another object of the present invention is to provide a quick coupler for a construction machine in which the quick coupler is structurally assembled in a simple manner so that it can be installed and removed in a rapid and easy manner although various attachments are replaced depending on a specification of the machine on a construction site.
  • a quick coupler for a construction machine including:
  • the quick coupler for a construction machine in accordance with the present invention may further includes an elastic member installed inside the large chamber of the hydraulic cylinder, the elastic member being configured to elastically support a rear end portion of the wedge fixture at one side thereof and a front end portion of the rod at the other side thereof.
  • the quick coupler for a construction machine in accordance with the present invention may further include a rod stopper configured to restrict a maximum extending range of the rod in the hydraulic cylinder so that the coupling state between the first wedge, the second wedge and the coupling fastening pins is securely maintained.
  • the quick coupler for a construction machine in accordance with the present invention may further include a support block configured to restrict a maximum projecting range of the second wedge in a state where the left side wall of the main body is bought into close contact with the guide of the second wedge so that the coupling state between the second wedge and the other of the coupling fastening pins is securely maintained.
  • the main body of the quick coupler may be fixedly installed on a base end portion of an arm so that various attachments required depending on a construction site or a work object can be easily replaced.
  • the quick coupler for a construction machine in accordance with the present invention as constructed above has the following advantages.
  • the movement of the hydraulic cylinder and the wedges is restricted by the stopper in an initial wedge decoupling position for the removal of the attachment, and the movement of the wedges and the movement of the hydraulic cylinder and the rod are restricted by the guide and the rod stopper in a wedge coupling position for the installation of the attachment so that the removal and installation operation of the attachment is effectively performed.
  • the quick coupler for a construction machine in accordance with the present invention has an advantage in that the coupling and decoupling operation between the wedges and the coupling fastening pins can be performed in a secure and safe manner within a preset range during the installation or removal of the attachment.
  • the quick coupler for a construction machine in accordance with the present invention has another advantage in that it is driven by the hydraulic pressure and the mechanical coupling between the stopper and the guide so that the replacement operation of the attachment can be easily performed in a construction site.
  • Fig. 2 is a schematic cross-sectional view showing a quick coupler for a construction machine in accordance with one embodiment of the present invention
  • Fig. 3 is a schematic cross-sectional view showing the coupling state of the wedges in a quick coupler as shown in Fig. 2
  • Fig. 4 is a schematic cross-sectional view showing a quick coupler for a construction machine in accordance with another embodiment of the present invention.
  • a reference numeral 21 denotes a main body of a quick coupler in accordance with the present invention
  • a reference numeral 28 denotes a first wedge
  • a reference numeral 29 denotes a second wedge
  • a reference numeral 30 denotes a hydraulic cylinder
  • a reference numeral 31 denotes a stopper
  • a reference numeral 32 denotes a large chamber
  • a reference numeral 33 denotes a small chamber
  • a reference numeral 35 denotes a rod
  • a reference numeral 36 denotes a rod stopper
  • a reference numeral 39 denotes a support block
  • a reference numeral 40 denotes a guide.
  • the quick coupler for a construction machine in accordance with the present invention can easily perform the installation and removal operation of an attachment 4 for the replacement of the attachment 4 while the movement of the first wedge 28 and the second wedge 29 and the movement of the hydraulic cylinder 30 and the rod 35 in left and right directions are performed.
  • the quick coupler for a construction machine in accordance with the present invention includes the main body 21 having hook parts 24 formed protrudingly outwardly from a left side wall 22 and a right side wall 23 thereof, respectively, to support a pair of opposed coupling fastening pins 25.
  • the main body 21 and the hook parts 24 may have an external appearance of the same structure as that of typical known elements, and openings 26 for the withdrawal of the wedges may be formed on the main body 21 or the left side wall 22 and the right side wall 23.
  • the hook parts 24 may be formed as a pair of curved structures having the same shapes, which are protruded toward the left and right side of the main body, and contact faces 24a of the hook parts 24 may have a structure in which the contact faces surround the outer circumferences of the coupling fastening pins 25
  • the quick coupler for a construction machine in accordance with the present invention includes a hydraulic cylinder 30, a first wedge 28, a second wedge 29, and a stopper that restricts the movement of the hydraulic cylinder 30 an the second wedge 29.
  • the hydraulic cylinder 30 includes a large chamber 32, a small chamber 33, a wedge fixture 37 fixed to an inlet of the large chamber 32, and a rod 35 driven to be extended or retracted in the hydraulic cylinder 30 by hydraulic pressure.
  • the rod 35 is moved in a direction opposite to the wedge fixture 37 when the rod 35 is driven to be extended, and the hydraulic cylinder 30 includes through-holes 34a and 34b formed therein in such a manner as to fluidically communicate with the large chamber 32 and the small chamber 33 to perform the action of the hydraulic pressure.
  • the hydraulic cylinder 30 can be supplied with hydraulic fluid from a hydraulic tank (not shown).
  • a hydraulic tank not shown
  • the first wedge 28 in accordance with the present invention is fixed to an outer end portion of the wedge fixture 37 and is coupled to or decoupled from one of the coupling fastening pins 25 through the movement of the hydraulic cylinder 30.
  • the second wedge29 includes a guide 40 formed protrudingly downwardly from the main body 21 and is fixed to an outer end portion of the rod 35.
  • the wedge fixture 37 and the first wedge 28 are fixedly fastened in a fastening manner by a pin 41 or a bolt fastening manner during the assembly thereof, and the rod and the second wedge 29 may also be fixedly fastened in a fastening manner by a pin 41 or a bolt fastening manner during the assembly thereof.
  • the second wedge 29 is moved in a direction opposite to the first wedge 28 when the rod 35 is extended or retracted so that the second wedge is coupled to or decoupled from the other of the coupling fastening pins 25.
  • the first wedge 28 and the second wedge 29 are moved in a direction far away from each other when the rod 35 is extended so that the first wedge 28 and the second wedge 29 can be coupled to the coupling fastening pins 25.
  • the first wedge 28 and the second wedge 29 are moved in a direction close to each other when the rod 35 is retracted so that the first wedge 28 and the second wedge 29 can be decoupled from the coupling fastening pins 25.
  • the stopper 31 in accordance with the present invention is installed between the hydraulic cylinder 30 and the second wedge 29 and is configured to restrict the movement of the hydraulic cylinder 30 which is moved to allow the second wedge to be decoupled from the fastening pin 25 and the movement of the second wedge 29.
  • the stopper 31 may be configured as a rectangular block unit made of a steel material to support a force acting on the hydraulic cylinder 30 and the second wedge 29, and the force may act on the hydraulic cylinder 30 and the second wedge 29 simultaneously or separately from both sides of the stopper 31.
  • the stopper 31 may be formed as a rectangular structure having a left side surface and a right side surface, which are protruded outwardly from a bottom of the main body 21, and various geometric modifications of the stopper 31 are possible in consideration of a stress or an external force required for the first wedge 28 and the second wedge 29.
  • the quick coupler includes an elastic member 42 installed inside the large chamber 32 of the hydraulic cylinder 30.
  • the elastic member elastically supports a rear end portion of the wedge fixture 37 at one side thereof and a front end portion of the rod 35 at the other side thereof.
  • the quick coupler for a construction machine in accordance with the present invention includes a rod stopper 36 installed in the hydraulic cylinder 30 so that a maximum extending range of the rod 35 is restricted by the rod stopper 36.
  • a rod stopper 36 installed in the hydraulic cylinder 30 so that a maximum extending range of the rod 35 is restricted by the rod stopper 36.
  • the quick coupler may include a support block 39 configured to restrict a maximum projecting range of the second wedge 29 in a state where the left side wall 22 of the main body 21 is bought into close contact with the guide 40 of the second wedge 29.
  • the support block 39 may be integrally formed with the left side wall 22 of the bottom surface of the main body 21.
  • the main body 21 of the quick coupler is fixedly installed on a base end portion of an arm.
  • an operator may replace a bucket with various attachments including a breaker and the like.
  • the hydraulic cylinder 30 and the first and second wedges 28 and 29 are driven from an initial position for the decoupling of the wedges to a mounting position for the coupling of the wedges.
  • the hydraulic cylinder 30 and the first and second wedges 28 and 29 are positioned in an initial position for the decoupling of the wedges from the coupling fastening pins 25.
  • the hydraulic cylinder 30 connected to the first wedge 28 is positioned in proximity to the right side of the stopper 31
  • the second wedge 29 connected to the hydraulic cylinder 30 through the rod 35 is positioned in proximity to the left side of the stopper 31.
  • the guide 40 of the second wedge 29 connected to the hydraulic cylinder 30 through the rod 35 is installed in proximity to the left side of the stopper 31.
  • the hydraulic cylinder 30 maintains a balanced state or a stationary state where there is no movement of the rod to the left or right on the drawing sheet by means of the hydraulic pressure formed in the large chamber 32 and the small chamber 33 thereof.
  • first wedge 28 and the second wedge 29 are maintained in a state of being decoupled from the coupling fastening pins 25, respectively.
  • FIG. 3 the mounting state for the coupling of the wedges to the coupling fastening pins 25 is shown in Fig. 3 .
  • the hydraulic cylinder 30, the rod 35, the first wedge 28, and the second wedge 29, which are moved in the main body 21, are positioned in the mounting position for the coupling of the wedges to the coupling fastening pins 25.
  • the rod 35 is extended from the hydraulic cylinder 30 by the hydraulic pressure formed in the large chamber 32 and the first wedge 28 connected to the hydraulic cylinder 30 through the wedge fixture 37 is moved to the right on the drawing sheet by its reaction force.
  • the movement of the first wedge 28 is restricted by the contact support between the wedge fixture 37 and the right side wall 23 of the main body 21, and an inclined face of the first wedge 28 supports the outer circumference of one of the coupling fastening pins 25.
  • the second wedge 29 is moved to the maximum extending range of the rod 35.
  • the second wedge 29 is moved to a position where an inclined face of the second wedge 29 sufficiently supports the outer circumference of the other of the coupling fastening pins 25, the movement of the second wedge 29 is restricted by the contact support between the guide 40 and the left side wall 22 of the main body 21 or the support block 39.
  • the hydraulic cylinder 30, the rod 35, the first wedge 28 and the second wedge 29 in the main body 21 are moved to a direction opposite to the mounting position of the wedges so that the hydraulic cylinder 30, the rod 35, the first wedge 28 and the second wedge 29 return to the initial position for the decoupling of the wedges from the coupling fastening pins 25.
  • the coupling and decoupling position of the wedges for the replacement or installation/removal of the attachment is set accurately, and thus an operator can perform the assembly and replacement operation of the attachment in an easy and safe manner on a construction site.
  • the quick coupler for a construction machine of the present invention as constructed above is useful for safe and efficient replacement and assembly of various attachments including a breaker or other option apparatus required depending on construction site or a work object.

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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)
EP13892160.6A 2013-08-30 2013-08-30 Schnellkupplung für baumaschine Withdrawn EP3040482A4 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2013/007851 WO2015030282A1 (ko) 2013-08-30 2013-08-30 건설기계용 퀵 커플러

Publications (2)

Publication Number Publication Date
EP3040482A1 true EP3040482A1 (de) 2016-07-06
EP3040482A4 EP3040482A4 (de) 2017-04-19

Family

ID=52586819

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13892160.6A Withdrawn EP3040482A4 (de) 2013-08-30 2013-08-30 Schnellkupplung für baumaschine

Country Status (3)

Country Link
EP (1) EP3040482A4 (de)
KR (1) KR20160041944A (de)
WO (1) WO2015030282A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11421394B2 (en) 2016-08-18 2022-08-23 Daemo Engineering Co., Ltd. Double safety device for quick coupler

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7041059B2 (ja) 2015-12-07 2022-03-23 ウェッジロック・エクイップメント・リミテッド クイック・カプラのための係止デバイス

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9214255D0 (en) * 1992-07-04 1992-08-19 Massey Ferguson Mfg Implement attachement coupler
US6902346B2 (en) * 2002-03-15 2005-06-07 Hendrix Manufacturing, Ltd. Hydraulic coupler
NO20050638D0 (no) * 2005-02-04 2005-02-04 Gjerstad Mek Ind As Vendbar hurtigkobling
JP5237561B2 (ja) * 2007-01-16 2013-07-17 株式会社室戸鉄工所 アタッチメントカプラ
EP2362024A2 (de) * 2010-02-26 2011-08-31 Viby Attachment Worldwide A/S Schnellkupplung für ein Grab- und Ladewerkzeug
KR101727635B1 (ko) 2010-12-23 2017-04-17 볼보 컨스트럭션 이큅먼트 에이비 건설중장비용 퀵 커플러
GB201109675D0 (en) * 2011-06-09 2011-07-27 Monaghan Conor Hitch coupler
KR101210833B1 (ko) * 2012-07-26 2012-12-11 주식회사 필엔지니어링 퀵커플러의 자동 안전장치

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2015030282A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11421394B2 (en) 2016-08-18 2022-08-23 Daemo Engineering Co., Ltd. Double safety device for quick coupler

Also Published As

Publication number Publication date
KR20160041944A (ko) 2016-04-18
WO2015030282A1 (ko) 2015-03-05
EP3040482A4 (de) 2017-04-19

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