WO1997003013A1 - Dispositif destine a monter et demonter un contrepoids - Google Patents

Dispositif destine a monter et demonter un contrepoids Download PDF

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Publication number
WO1997003013A1
WO1997003013A1 PCT/JP1996/001912 JP9601912W WO9703013A1 WO 1997003013 A1 WO1997003013 A1 WO 1997003013A1 JP 9601912 W JP9601912 W JP 9601912W WO 9703013 A1 WO9703013 A1 WO 9703013A1
Authority
WO
WIPO (PCT)
Prior art keywords
counterweight
cable
boom
hook
tip
Prior art date
Application number
PCT/JP1996/001912
Other languages
English (en)
Japanese (ja)
Inventor
Masahiko Hamaguchi
Original Assignee
Komatsu 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 Komatsu Ltd. filed Critical Komatsu Ltd.
Publication of WO1997003013A1 publication Critical patent/WO1997003013A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/18—Counterweights

Definitions

  • the present invention relates to a counterweight attaching / detaching device used for a construction vehicle such as a hydraulic excavator or a hydraulic crane. Background technology
  • FIG. 1 A conventional attachment / detachment device for a hydraulic excavator counterweight is described in FIG.
  • the lower traveling body 21 of the hydraulic excavator 20 can freely move back and forth by a traveling motor (not shown).
  • An upper revolving unit 23 that can be turned by a turning motor (not shown) is mounted above the lower traveling unit 21.
  • a work implement 30, a machine cabinet 26, an operator cabin 27 and a counterweight 28 a are attached to the upper rotating body 23.
  • the work machine 30 is composed of a boom 31, an arm 33, a packet 35, and a plurality of hydraulic cylinders 32, 34, and 36, and is configured to perform earth and sand excavation work.
  • the counterweight 28a is fixed to the rear portion of the upper revolving structure 23 with a bolt or the like in order to balance the work implement 30 and the work load.
  • the hook on the back of the boom of the work equipment is used to pull the top of the counterweight through the pulleys on the upper end of the rear stand of the vehicle.
  • the cable is connected to the hook. This allows the boom The counterweight is lifted and suspended by the operation of the moving cable.
  • the hook provided on the back of the boom of the work equipment is connected to the upper end of the link rotatably mounted on the upper end of the rear stand of the vehicle.
  • the cable is connected to the hook at the top of the counterweight via the pulleys installed.
  • the counterweight is moved back and forth by rotating the link in the factory overnight, and the counterweight is lifted and hung by the boom undulation.
  • a pulley installed on the upper end of a rotatably mounted mast at the rear of the vehicle body from a hook installed on the back of the boom of the work equipment
  • the cable is connected to the hook at the top of the counter weight via.
  • the counterweight is moved back and forth by rotating the mast overnight, and the counterweight is lifted and hung by the boom undulation.
  • the hook provided at the upper end of the rear stand of the vehicle body is connected to the pulley provided on the back of the boom of the work machine and the stand.
  • a cable is connected to the hook above the counter weight via a pulley provided and a pulley provided on a link rotatably provided on the stand.
  • the hook provided at the upper end of the link and the hook provided on the arm of the working machine are connected by a cable, and the counterweight is moved back and forth by rotating the arm of the working machine. The counterweight is being lifted and suspended due to the ups and downs of the boom.
  • any of the above prior arts requires a pulley, a pulley mounting stand or a link device for changing the position of the pulley, and the like, and the structure is complicated, the cost is high, and the attaching / detaching operation is complicated. There was a problem. Disclosure of the invention
  • the present invention has been made in order to solve the problems of the related art, and an object of the present invention is to provide a low-cost counterweight attaching / detaching apparatus in which a counterweight can be easily attached / detached. I do.
  • the first invention of the counterweight attaching / detaching device according to the present invention is as follows.
  • a construction vehicle including an upper revolving unit, a boom attached to a front portion of the upper revolving unit, and a power center detachably attached to a rear portion of the upper revolving unit,
  • a hydraulic cylinder rotatably attached to the frame of the upper revolving structure with a support point, a first cable connecting the tip of the mouth of the hydraulic cylinder to the boom,
  • a second cable is provided for connecting the tip end of the mouth and the power center weight.
  • the counterweight can be lifted and hung by the expansion and contraction of the hydraulic cylinder and the up / down movement of the boom.
  • the first cable connects the first hook attached to the tip of the mouth to the hook provided on the boom, and the second cable attaches the second hook attached to the tip of the mouth.
  • the hook and the hook provided on the counterweight may be connected.
  • a connecting shaft may be attached to the leading end of the rod, and the first hook, the second hook, and the leading end of the rod may be rotatable around the connecting shaft.
  • the counterweight be formed with a concave portion in which a hydraulic cylinder can be arranged.
  • the position where the base end of the hydraulic cylinder is attached to the frame is on the boom side with respect to the vertical line from the center of gravity of the counterway in the front-rear direction. It is desirable that the connecting position with the bull is on the rear side of the vehicle with respect to the mounting position of the base end of the hydraulic cylinder.
  • the hydraulic cylinder is composed of a plurality of hydraulic cylinders, and the plurality of hydraulic cylinders are arranged with the base end portion attached to the frame and with the center of gravity of the counterweight in the left-right width direction interposed therebetween. Is also good.
  • the second invention of the counterweight attaching / detaching device is as follows.
  • a hydraulic cylinder rotatably mounted on the frame of the upper revolving structure with a support point, a bracket disposed on the frame, and an outer box rotatably mounted on the bracket;
  • An inner box rotatably attached to the tip of the mouth of the hydraulic cylinder and capable of moving the inner surface of the outer box in the vertical direction; and a first cable for connecting the tip of the rod to the boom.
  • a second cable connecting the tip of the mouth and the power outlet.
  • the boom when removing the counterweight, first, the boom is set to the forwardly inclined position, and the first hook and the boom hook are connected by the first cable. Subsequently, the second hook and the hook for the counterweight are connected by the second cable. Next, the counterweight is lifted by removing the mounting bolts and extending the hydraulic cylinder to remove the counterweight from the upper revolving superstructure. When the boom is rotated backward in this state, the counterweight separates from the body frame and descends. After moving the boom to the backward tilt position, the hydraulic cylinder is contracted, and the counterweight descends further and lands on the ground.
  • the attaching / detaching device can have a simple structure that only requires the preparation of the hydraulic cylinder, the hook provided at the tip of the rod, and the cables for lifting and lowering the counterweight.
  • the attachment and detachment work is easy and the cost is low.
  • FIG. 1 is a side view of a counterweight attaching / detaching apparatus according to a first embodiment of the present invention
  • FIGS. 2A and 2B are detailed views of the counterweight attaching / detaching apparatus of FIG. 1, and FIG. Side view showing the mounting state of the tool and the hydraulic cylinder,
  • Figure 2B is a perspective view of the counterweight
  • FIG. 3 is a view from arrow m in Fig. 2A.
  • FIG. 4 is a hydraulic circuit diagram of the counterweight attachment / detachment device according to the first embodiment
  • FIGS. 5 to 8 are operation explanatory diagrams of the counterweight attachment / detachment device according to the first embodiment.
  • FIG. 5 is a diagram for explaining the first operation
  • FIG. 6 is the second operation explanatory diagram
  • Fig. 7 is a diagram for explaining the third operation
  • Fig. 8 is the fourth operation explanatory diagram
  • Fig. 9 is a side view showing the landing state of the counterweight according to the first embodiment
  • FIG. 10 is a cross-sectional view of a hydraulic cylinder connecting portion of a counterweight attaching / detaching device according to a second embodiment of the present invention.
  • FIG. 11 is an explanatory diagram of a hydraulic cylinder mounted state of a counterweight mounting / removing device according to a third embodiment of the present invention.
  • Fig. 12 is a view from the X It arrow of Fig. 11,
  • FIG. 13 is an explanatory view of a state in which a hydraulic cylinder is mounted in a counterweight attaching / detaching apparatus according to a fourth embodiment of the present invention.
  • FIG. 14 is an explanatory view taken along the section XW—XIV in FIG.
  • FIG. 15 is an enlarged view of the section XV—XV in FIG.
  • Figure 16 is a side view of a conventional hydraulic shovel. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 shows a first embodiment, in which a hook 56 is fixed to a boom 31.
  • the hydraulic cylinders 41 and 42 are connected to the power center 28 via cables 58 and 58 (see FIG. 2).
  • One end of the hydraulic cylinders 41, 42, the hook 56, and the first cable 55 are attached with the shuttles 57, 57.
  • the counterweight 28 is detachably attached to a vehicle body frame 11 mounted inside the upper swing body 23 with bolts 12. On the upper surface of counter weight 28, suspend the suspension A lock 29 is provided.
  • the bottom sides 4 3, 4 4 of the hydraulic cylinders 4 1, 4 2 are rotatably attached to brackets 13 provided on the body frame 11 with pins 14.
  • the center of the hole of the pin 14 is located a distance L ahead of the center of gravity W of the force counterweight 28 when the counterweight 28 is mounted.
  • a recess 28 b is formed in the center of the counterweight 28, and the two hydraulic cylinders 41 and 42 can be arranged in the recess 28 b serving as a space.
  • the rods 45, 46 of the hydraulic cylinders 41, 42 are fixed to a shaft (connecting shaft) 47 having female threads at both ends by stoppers 48.
  • the shaft 47 has a first hook 51 (see FIG. 2A) for the first cable 55 at the center and a second hook 58 for the second cable 58 at both ends. 5 and 2 are mounted so that they can rotate freely.
  • One end of the second cable 58 is connected to a hook 29 provided in the countdown wait 28, and the other end is connected to the second hook 52 via the shuttle 59.
  • FIG. 4 shows a hydraulic circuit for operating the hydraulic cylinders 41 and 42.
  • a hydraulic pump 61 that drives each of the hydraulic cylinders 32, 34, and 36 of the work machine 30 is used as a hydraulic pressure source.
  • a rotary valve 6 for switching between the first main valve 62 for supplying hydraulic oil to the hydraulic cylinders 32, 34, and 36 and the second main valve 63 for operating the counterweight 28 4 are provided.
  • a counterbalance valve 65 is provided between the second main valve 63 and the hydraulic cylinder 4K42.
  • the positions of the boom 31, hydraulic cylinders 41, 42, and counterweight 28 are set as initial positions as shown in FIG. FIG. 1 shows this state for the entire vehicle body. Then, remove the mounting bolt 12 of the counterweight 28.
  • the second main valve 63 is operated to the “extended” side shown in the figure.
  • the rods 45, 46 of the hydraulic cylinders 41, 42 are extended, tension is applied to the second cable 58, and the counter weight 28 is released. Start to float.
  • the tips of the mouths 45 and 46 become the longest at the Q position, and the counterweight 28 is lifted upward and moves to the A position.
  • two hydraulic cylinders 41 and 42 are connected to the first hydraulic cylinder.
  • the shafts 51 are connected to each other with a shaft 47 therebetween, and second ends 52 are provided at both ends of the shaft 47.
  • the hook 56 of the boom 31 and the first hook 51 of the connecting portion are connected with the first cable 55, and the hook 29 of the counter weight 28 and the second hook 52 of the connecting portion are connected. And are connected by two second cables 58.
  • the counterweight 28 can be easily attached and detached by expanding and contracting the hydraulic cylinders 41 and 42 and raising and lowering the boom 31.
  • the length of the second cable 58 is sufficient, the positioning at the time of mounting the counterweight 28 is easy.
  • the hydraulic cylinders 41 and 42 have sufficient strokes, the counter weight 28 can be completely lowered to the ground.
  • the first hook 51 and the two second hooks 52 can freely rotate around the shaft 47, and the force from the first cable 55 and the second cable 58 can be reduced. Since it passes through the center of 47, no bending load is applied to the hydraulic cylinders 41 and 42, and the operation of the hydraulic cylinders 41 and 42 is smooth and the size can be reduced.
  • the attachment / detachment device is composed of only two hydraulic cylinders 41, 42, a connecting part of hydraulic cylinders 41, 42, and cables 55, 58, 58, so that the stand, pulley, No link or the like is required, the structure is simple, and the cost is low in addition to the miniaturization described above.
  • FIG. 10 shows the main part of the second embodiment, in which the rods 45, 45 of the hydraulic cylinders 41, 42,
  • the first cable is located at the center of the shaft 47a.
  • the first hook 51 for 55 is rotatably mounted, and the shaft 47a can rotate around the pin holes of the rods 45, 46. According to such a configuration, the structure is simplified and the cost is further reduced.
  • FIGS. 11 and 12 show a third embodiment.
  • Spherical bearings 49.49 are attached to the ends 43a and 44a of the hydraulic cylinders 41a and 42a, respectively. It is attached to bracket 13a provided on frame 11 with pins 14a.
  • the spherical bearings 49, 49 are mounted on the rods 45a, 46a of the hydraulic cylinders 41a, 42a.
  • Spherical surface The first hook 51a for the first cable 55 is held in the center between the bearings 49, 49, and the inner cylinders 49a, 49a of the spherical bearings 49, 49 have both ends.
  • the second hooks 52 a and 52 a with seats for the second cables 58 and 58 are fixed to a shaft 47 b having a female thread portion.
  • the first hook 5 la at the center is rotatably mounted on the shaft 47 b. According to such a configuration, the size of the connecting portion is further reduced, and the cost is reduced.
  • FIGS. 13 to 15 show a fourth embodiment, in which the above two hydraulic cylinders 41 and 42 are constituted by one hydraulic cylinder 41b.
  • the bottom 43 b of the hydraulic cylinder 41 b is rotatably connected to a bracket 13 b provided on the vehicle body frame 11 together with a lower part of the outer box 71 by pins 14 b.
  • the port 45b of the hydraulic cylinder 41b is rotatably attached to the upper part of the inner box 72 with a pin 16. Due to the expansion and contraction of the rod 45b, the inner box 72 moves vertically on the inner surface of the outer box 71.
  • a first hook 51 b for the first cable 55 is provided on a front surface of an upper portion of the inner box 72.
  • the pin 16 has female threads at both ends, the second hook 52 a is attached, and the pin 16 can rotate around the pin holes of the rod 45 b and the inner box 72. .
  • the present invention is useful as a counterweight attachment / detachment device that has a simple configuration, allows easy attachment / detachment of the counterweight, and is inexpensive.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Jib Cranes (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

L'invention concerne un dispositif de faible coût qui permet de monter et de démonter aisément un contrepoids. Ce dispositif se compose de cylindres hydrauliques (41, 42) montés sur un dispositif pivotant supérieur (23), d'un premier câble (55) reliant les extrémités des tiges (45, 46) des cylindres hydrauliques (41, 42) à une flèche (31), et d'un deuxième câble (58) reliant les extrémités des tiges (45, 46) des cylindres hydrauliques (41, 42) à un contrepoids (28). Le contrepoids (28) peut être accroché de sorte qu'il soit soulevé et abaissé par l'extension et l'escamotage des cylindres hydrauliques (41, 42) et le soulèvement et l'abaissement de la flèche (31).
PCT/JP1996/001912 1995-07-12 1996-07-10 Dispositif destine a monter et demonter un contrepoids WO1997003013A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP19922995 1995-07-12
JP7/199229 1995-07-12

Publications (1)

Publication Number Publication Date
WO1997003013A1 true WO1997003013A1 (fr) 1997-01-30

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Application Number Title Priority Date Filing Date
PCT/JP1996/001912 WO1997003013A1 (fr) 1995-07-12 1996-07-10 Dispositif destine a monter et demonter un contrepoids

Country Status (2)

Country Link
CA (1) CA2224703A1 (fr)
WO (1) WO1997003013A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7669898B2 (en) * 2005-11-18 2010-03-02 Komatsu Ltd. Apparatus for detaching and attaching counterweight
US20170051473A1 (en) * 2015-08-21 2017-02-23 Caterpillar Inc. Machine counterweight installation and removal

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10066365B2 (en) * 2016-01-22 2018-09-04 Hpm—Hydraulic Performance Machines Srl Public works vehicle provided with counterweight lifting system
BE1024764B1 (fr) * 2016-11-30 2018-06-28 C M L Ind S A Engin de chantier

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4835281Y1 (fr) * 1970-11-11 1973-10-24
JPS6221160U (fr) * 1985-07-17 1987-02-07
JPH0453788U (fr) * 1990-09-14 1992-05-08

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4835281Y1 (fr) * 1970-11-11 1973-10-24
JPS6221160U (fr) * 1985-07-17 1987-02-07
JPH0453788U (fr) * 1990-09-14 1992-05-08

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7669898B2 (en) * 2005-11-18 2010-03-02 Komatsu Ltd. Apparatus for detaching and attaching counterweight
US20170051473A1 (en) * 2015-08-21 2017-02-23 Caterpillar Inc. Machine counterweight installation and removal

Also Published As

Publication number Publication date
CA2224703A1 (fr) 1997-01-30

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