WO2012026233A1 - 建設機械 - Google Patents
建設機械 Download PDFInfo
- Publication number
- WO2012026233A1 WO2012026233A1 PCT/JP2011/065962 JP2011065962W WO2012026233A1 WO 2012026233 A1 WO2012026233 A1 WO 2012026233A1 JP 2011065962 W JP2011065962 W JP 2011065962W WO 2012026233 A1 WO2012026233 A1 WO 2012026233A1
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- WO
- WIPO (PCT)
- Prior art keywords
- center
- boom
- height dimension
- pin insertion
- bottom plate
- Prior art date
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Classifications
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- 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
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0808—Improving mounting or assembling, e.g. frame elements, disposition of all the components on the superstructures
-
- 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
- E02F9/006—Pivot joint assemblies
-
- 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
- E02F9/08—Superstructures; Supports for superstructures
-
- 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
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0808—Improving mounting or assembling, e.g. frame elements, disposition of all the components on the superstructures
- E02F9/0816—Welded frame structure
-
- 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
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
-
- 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
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
- E02F9/12—Slewing or traversing gears
- E02F9/121—Turntables, i.e. structure rotatable about 360°
Definitions
- the present invention relates to a construction machine such as a hydraulic excavator, for example, and particularly to a construction machine provided with a turning frame in which a tail frame is connected to the rear side of a center frame.
- a hydraulic excavator which is a typical example of a construction machine, includes a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body and forms a vehicle body with the lower traveling body, and the upper swivel It is mainly constituted by a working device provided on the front side of the body so as to be able to move up and down.
- the upper swing body includes a swing frame, a cab provided on the front left side of the swing frame, an engine and a hydraulic pump mounted on the rear side of the swing frame, a building cover that covers the engine, and the like. And a counterweight attached to the rear end.
- the revolving frame of the upper revolving structure includes, for example, a center frame constituting a central portion of the revolving frame, a tail frame connected to the rear side of the center frame, and left and right directions with the center frame and the tail frame interposed therebetween. It is comprised by the left and right side frame provided in both sides (patent document 1).
- the center frame of the revolving frame is, for example, a front bottom plate, and extends in the front and rear directions on the front bottom plate and is erected with a gap in the left and right directions, and the front side is connected to the boom and boom cylinder of the working device. It consists of left and right front vertical plates that serve as a bracket for pin connection.
- the tail frame is composed of left and right I-type beams joined to the rear part of each front vertical plate, and a rear bottom plate connecting the I-type beams.
- the left and right I-shaped beams of the tail frame are provided on the upper side of the left and right rear vertical plates, which extend in the front and rear directions and the front ends are joined to the front vertical plates, and on the front of the rear vertical plates, It is formed by an upper flange portion extending in the rear direction and having a front end joined to each front vertical plate, and a lower flange portion provided on the lower side of each rear vertical plate and extending in the front and rear directions and having the front end joined to the front bottom plate. ing.
- the bracket portion of the center frame is provided with a boom pin insertion hole for pin coupling the foot portion (base end portion) of the boom and a cylinder pin insertion hole for pin coupling the base end portion of the boom cylinder.
- the foot part of the boom is pivotably attached to the bracket part of the center frame via a boom connecting pin inserted through the boom pin insertion hole
- the base end part of the boom cylinder is a cylinder pin. It is rotatably attached to the bracket portion of the center frame via a cylinder connecting pin inserted through the insertion hole.
- the distance between the foot portion of the boom and the base end portion of the boom cylinder it is preferable to increase the distance between the foot portion of the boom and the base end portion of the boom cylinder.
- the height dimension from the front bottom plate of the center frame to the foot of the boom that is, the height dimension from the front bottom plate of the center frame to the center of the hole of the boom pin insertion hole must be increased.
- the left and right front vertical plates including the bracket portion have sufficient strength so as to withstand the torsional moment applied from the boom.
- Patent Document 2 discloses a configuration in which the strength of the left and right front vertical plates can be ensured by providing a reinforcing member between the left and right front vertical plates and the front bottom plate.
- Patent Document 3 the front side of the left and right vertical plates (center beam) is configured in a box shape so that the strength of the front side of the left and right vertical plates can be secured. A configuration is disclosed.
- JP 2001-342646 A Japanese Patent Laid-Open No. 10-37244 JP-A-8-165679
- the weight of the swivel frame may increase as the reinforcing member is provided.
- the front side of the left and right vertical plates (center beams) is formed in a box shape, so that the structure becomes complicated, resulting in an increase in size and weight. .
- the present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a construction machine that can make the center frame of the revolving frame small and light.
- the present invention is provided with a lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a front and rear side of the upper revolving body that can be raised and lowered.
- a tail frame connected to the rear side of the center frame is formed by a left and right front vertical plate which is a bracket portion that pin-couples a boom and a boom cylinder of the work device, and a rear portion of each front vertical plate.
- left and right I-type beams and rear bottom plates connecting the I-type beams extend in the front and rear directions, and the front ends thereof are respectively Left and right rear vertical plates joined to the front vertical plate, and the respective rear vertical plates
- An upper flange portion provided on the upper side and extending in the front and rear directions and having a front end joined to each front vertical plate, and provided on the lower side of each rear vertical plate and extending in the front and rear directions, and the front end joined to the front bottom plate. It is applied to a construction machine formed by a lower flange portion.
- a feature of the configuration adopted by the present invention is that the bracket portion of the center frame is provided with a boom pin insertion hole for pin-connecting the foot portion of the boom, and from the front bottom plate to the hole center of the boom pin insertion hole.
- the height dimension (A) is smaller than the height dimension (B), where (A) is the height dimension and (B) is the height dimension from the front bottom plate to the front end of the upper flange portion. It is in setting.
- the height dimension from the front bottom plate to the foot part of the boom can be reduced, and the torsional moment and bending moment applied to the left and right front vertical plates from the boom can be reduced accordingly. Therefore, it is necessary to provide a reinforcing member between the left and right front vertical plates and the front bottom plate as in the prior art, or to configure the front side of the left and right vertical plates (center beam) in a box shape.
- the center frame can be made small and lightweight.
- the height position of the foot portion of the boom can be lowered, the height dimension of the construction machine as a whole can also be lowered. Therefore, for example, even when a trailer loaded with construction machines travels on a public road, this height dimension can be easily kept within a range regulated by laws and the like.
- a cylinder pin insertion hole for pin-coupling the boom cylinder is provided at a position on the front side and the lower side of the boom pin insertion hole, and the height
- the dimension (A) is set smaller than the height dimension (B)
- the distance between the center of the cylinder pin insertion hole and the center of the boom pin insertion hole is (C) and the horizontal direction (D)
- the height dimension (Ap) from the front bottom plate to the center of the boom pin insertion hole is larger than the height dimension (Bp) from the front bottom plate to the front end of the upper flange.
- the distance (C) Is the separation dimension (C
- the distance (D) is set to be larger than the distance (Dp) so as to correspond to the height dimension (A) lower than the height dimension (Ap) so as to be equal to p). It is to have done.
- the hole center of the cylinder pin insertion hole and the hole center of the boom pin insertion hole correspond to the amount of the height dimension (A) from the front bottom plate to the hole center of the boom pin insertion hole being lowered. Since the distance (D) in the horizontal direction is set to be large, it is possible to secure a separation dimension (C) between the hole center of the cylinder pin insertion hole and the hole center of the boom pin insertion hole. Thereby, even when the height dimension (A) from the front bottom plate to the hole center of the boom pin insertion hole is lowered, the distance between the foot portion of the boom and the base end portion of the boom cylinder can be secured. The force of the boom cylinder can be used effectively.
- S) is the distance between the center frame turning center (O) and (E).
- the height dimension (Ap) from the front bottom plate to the center of the boom pin insertion hole is the upper flange portion.
- the distance (E) between the center line (SS) in the rear direction and the turning center (O) of the center frame is set small before passing through the middle between the left front vertical plate and the right front vertical plate.
- the left front and right front plates can be evenly approached in the left and right directions with respect to the turning wheel provided between the upper turning body and the lower traveling body.
- the turning wheel can receive the force applied from the left and right front vertical plates via the front bottom plate in a state that is closer to the left and right directions, and can reduce the twist of the center frame ( It can be advantageously constructed in terms of strength).
- the bracket portion of the center frame is provided with a cylinder pin insertion hole for pin coupling the boom cylinder at a position in front of and below the boom pin insertion hole.
- the height dimension (A) is set smaller than the height dimension (B)
- the distance between the center of the cylinder pin insertion hole and the center of the boom pin insertion hole is (C)
- the height dimension (Ap) from the front bottom plate to the center of the boom pin insertion hole is larger than the height dimension (Bp) from the front bottom plate to the front end of the upper flange.
- Cylinder pin insertion The distance between the hole center and the boom pin insertion hole center is (Cp), the horizontal distance is (Dp), and the center frame before passing through the middle between the left front vertical plate and the right front vertical plate.
- the separation dimension (C) is approximately the same as the separation dimension (Cp).
- the distance (D) is set to be larger than the distance (Dp) corresponding to the height dimension (A) being lower than the height dimension (Ap), and the distance (D It is preferable to set E) to be smaller than the distance (Ep).
- the present invention provides a front plate extending in the left and right directions and connecting the left and right front vertical plates on the front side between the left and right front vertical plates, Has a configuration in which a first bent portion and a second bent portion bent at two locations in the front and rear directions are provided.
- the front plate connecting the front side between the left and right front vertical plates is configured to be folded at two locations, so that the strength of the front plate is improved as compared with the case of folding at one location.
- the degree of freedom in design such as the inclination angle of the front plate and the positional relationship of the front end portion (lower end portion) of the front plate with respect to the turning wheel can be increased.
- FIG. 1 is a front view showing a hydraulic excavator according to an embodiment of the present invention. It is a top view which shows a turning frame alone. It is a front view shown in the state which attached the turning wheel to the turning frame shown in FIG. It is a front view shown in the state which attached the turning wheel and the working apparatus to the turning frame shown in FIG. It is a right view of FIG. 2 which shows a turning frame alone. It is a perspective view which shows a turning frame. It is a disassembled perspective view which shows a turning frame. It is a front view which shows a center frame. It is a top view of FIG. 8 which shows a center frame. It is a front view which shows the center frame by a comparative example. It is a top view of FIG. 10 which shows the center frame by a comparative example.
- reference numeral 1 denotes a wheel-type hydraulic excavator which is a typical example of a construction machine.
- the hydraulic excavator 1 includes a wheel-type lower traveling body 2 capable of self-propelling and a swiveling wheel 3 on the lower traveling body 2.
- the upper revolving body 4 which is mounted so as to be able to turn and constitutes the vehicle body together with the lower traveling body 2, and the work device 5 which is provided on the front side of the upper revolving body 4 so as to be able to be lifted and lowered.
- This wheel-type hydraulic excavator 1 travels on a general road by a wheel-type lower traveling body 2, and performs excavation work of earth and sand using a work device 5 at a work site.
- the lower traveling body 2 includes a track frame 2A to which the turning wheel 3 is attached on the upper surface side, and a front and rear wheels 2B provided on the track frame 2A and driven by a hydraulic motor (not shown). It is configured.
- the lower traveling body 2 is configured to travel on public roads, work sites, and the like by driving the wheels 2B.
- the upper turning body 4 is provided on a left side of the front part of the turning frame 11 and a turning frame 11 (described later) mounted on the track frame 2A of the lower traveling body 2 via a turning wheel 3 so as to be turnable.
- a counterweight 7 provided on the rear end side of the cab 6 and the swing frame 11 for balancing the weight of the working device 5; an engine and a hydraulic pump provided on the front side of the counterweight 7 (not shown) And a hydraulic oil tank 9 and a fuel tank 10 provided on the front side of the building cover 8.
- the working device 5 is attached to a lower boom 5A as a boom whose base end side is rotatably attached to the front side of the revolving frame 11, and to the distal end side of the lower boom 5A.
- the turning frame 11 is composed of four parts, and each part is integrally joined to form one frame.
- the revolving frame 11 has a center frame 12 positioned at the center front side, a tail frame 30 positioned at the center rear side, and the left side of the center frame 12 and the tail frame 30.
- the left side frame 35 is positioned, and the right side frame 39 is also positioned on the right side.
- Reference numeral 12 denotes a center frame that constitutes a central portion of the revolving frame 11, and the center frame 12 extends on the front bottom plate 13 in the front and rear directions, and stands in the left and right directions with an interval therebetween.
- the left front vertical plate 14, the right front vertical plate 17 and the front vertical plates 14 and 17 which are provided are positioned on the front side of the front vertical plates 14 and 17 and extend in the left and right directions.
- a front plate 20 and a left cylinder mounting plate 21 and a right cylinder mounting plate 22 which are located on the front side of the front plate 20 and extend in the front and rear directions and are erected on the front bottom plate 13 at intervals in the left and right directions. It is roughly structured.
- the front bottom plate 13 indicates a front bottom plate 13 of the center frame 12, and the front bottom plate 13 is made of, for example, a thick steel plate having a substantially rectangular shape, and the revolving wheel 3 is attached to the lower surface side thereof.
- the front bottom plate 13 is provided with a plurality of bolt insertion holes 13A on the same circumference around the turning center O, and mounting bolts inserted into the respective bolt insertion holes 13A. It is the structure which attaches the turning ring
- the front bottom plate 13 is provided with a center hole 13B through which a center joint (not shown) is inserted at a portion corresponding to the turning center O.
- a swivel device mounting hole 13C to which a swivel device (not shown) is mounted is provided on the rear side of the center hole 13B.
- Numeral 14 is a left front vertical plate that is positioned on the left side of the front bottom plate 13 and extends substantially vertically so as to extend in the front and rear directions.
- the left front vertical plate 14 has a mountain shape in which the front and rear center portions protrude upward, and the front side pin-couples a lower boom 5A and a left boom cylinder (not shown) of the work device 5 to be described later. It is a bracket portion 14A.
- the left bracket portion 14A is located on the front side of the left front vertical plate 14 and is used for pin coupling the lower boom 5A and the left boom cylinder. For this reason, the left bracket portion 14 ⁇ / b> A includes a left boom mounting plate portion 15 described later and a left cylinder mounting plate portion 16.
- Reference numeral 15 denotes a left boom mounting plate portion located at an upper portion of the bracket portion 14A of the left front vertical plate 14, and the left boom mounting plate portion 15 uses a foot portion (base end portion) of the lower boom 5A as a boom connecting pin described later. 27 is rotatably supported (pin-coupled). Therefore, the left boom mounting plate portion 15 has a left boom pin insertion hole 15A through which the boom connecting pin 27 is inserted on the same axis as a right boom pin insertion hole 18A of the right boom mounting plate portion 18 described later. Is provided.
- the left boom pin insertion hole 15A is provided at a position lower than the front end of the upper flange portion 31B of the I-shaped beam 31 constituting the tail frame 30 described later. That is, as shown in FIGS. 3 and 8, the height dimension from the front bottom plate 13 to the hole center of the left boom pin insertion hole 15A is A, and the height dimension from the front bottom plate 13 to the front end of the upper flange portion 31B. Is set to B, the height dimension A is set smaller than the height dimension B, as shown in the following formula 1. Thereby, the height dimension from the front bottom board 13 to the foot part of the lower boom 5A can be made low, and the torsional moment, bending moment, etc. which are applied to the left front vertical board 14 from this lower boom 5A can be suppressed.
- Reference numeral 16 denotes a left cylinder mounting plate portion that constitutes the left bracket portion 14A of the left front vertical plate 14 together with the left boom mounting plate portion 15.
- the left cylinder mounting plate portion 16 is located on the front side and lower side of the left boom mounting plate portion 15. Is located.
- the left cylinder mounting plate portion 16 supports (pin-couples) the base end portion (bottom portion) of the left boom cylinder so as to be rotatable via a connecting pin for a left cylinder (both not shown).
- a pair of left cylinder pin insertion holes 16 ⁇ / b> A and 21 ⁇ / b> A are formed on the left cylinder mounting plate 16 and a later-described left cylinder mounting plate 21 provided facing the left bracket portion 14 ⁇ / b> A of the left front vertical plate 14. They are provided on the same axis.
- These left cylinder pin insertion holes 16A and 21A support the left boom cylinder via a left cylinder connecting pin.
- the left front vertical plate 17 denotes a right front vertical plate provided on the front bottom plate 13 with a left and right spacing between the left front vertical plate 14.
- the front right vertical plate 17 is located on the right side of the front bottom plate 13 and is erected substantially vertically so as to extend in the front and rear directions.
- the right front vertical plate 17 has a mountain shape with the front and rear central portions protruding upward, and the front side includes the lower boom 5 ⁇ / b> A and the right boom cylinder 5 ⁇ / b> E of the work device 5.
- Reference numeral 18 denotes a right boom mounting plate portion located at an upper portion of the right bracket portion 17A of the right front vertical plate 17, and the right boom mounting plate portion 18 connects a foot portion (base end portion) of the lower boom 5A to a boom connection described later.
- a pin 27 is rotatably supported (pin coupled).
- the right boom mounting plate portion 18 is provided with a right boom pin insertion hole 18A for inserting the boom connection pin 27 on the same axis as the left boom pin insertion hole 15A of the left boom mounting plate portion 15. It has been.
- the right boom pin insertion hole 18A is also provided at a position lower than the front end of the upper flange portion 32B of the I-shaped beam 32 constituting the tail frame 30 described later.
- the height dimension from the front bottom plate 13 to the hole center of the right boom pin insertion hole 18A is A
- the height dimension A is set to be smaller than the height dimension B, as shown in Equation 1 above.
- the height dimension from the front bottom board 13 to the foot part of the lower boom 5A can be made low, and the torsional moment, bending moment, etc. which are applied to the right front vertical board 17 from this lower boom 5A can be suppressed.
- Reference numeral 19 denotes a right cylinder mounting plate portion which constitutes a right bracket portion 17A of the right front vertical plate 17 together with the right boom mounting plate portion 18.
- the right cylinder mounting plate portion 19 is located on the front side and the lower side of the right boom mounting plate portion 18. Is located.
- the right cylinder mounting plate portion 19 supports (pin-couples) the base end portion (bottom portion) of the right boom cylinder 5E so as to be rotatable via a right cylinder connecting pin 28 described later.
- the right cylinder mounting plate portion 19 and the right cylinder mounting plate 22 described later have a pair of right cylinder pin insertion holes 19A, 22A on the same axis and the left cylinder pin insertion holes 16A, 21A is also provided on the same axis.
- These right cylinder pin insertion holes 19A, 22A support the right boom cylinder 5E via the right cylinder connecting pin 28.
- 20 is a front plate that is located on the front side of the front bottom plate 13 and connects the left and right front vertical plates 14 and 17, and the front plate 20 constitutes a part of the center frame 12.
- the front plate 20 is formed as a trihedral plate that is bent at two locations in the front and rear directions, for example, by bending a plate material such as a steel plate.
- the front plate 20 includes a front surface portion 20A that rises vertically from the front bottom plate 13, and a first bent portion 20B that is located on the upper end side of the front surface portion 20A and is bent toward the rear side.
- the first inclined portion 20C that is continuous with the front surface portion 20A via the first bent portion 20B, and the second inclined portion that is located on the upper end side of the first inclined portion 20C and is bent toward the front side. It is comprised by the bending part 20D and the 2nd inclination part 20E which follows the 1st inclination part 20C via this 2nd bending part 20D.
- the lower end edge of the front surface portion 20 ⁇ / b> A is joined to the upper surface of the front bottom plate 13 using welding means, the left end edge is joined to the inner surface of the left front vertical plate 14, and the right end edge is the inner side of the right front vertical plate 17. It is joined to the side.
- an opening 20F is formed in the front plate 20 across the front surface portion 20A and the first inclined portion 20C, and the opening 20F is, for example, an opening for passing a hydraulic hose (not shown) for the working device 5 It has become.
- left and right cylinder mounting plates 21 and 22, which will be described later, are joined to the front surface of the front plate 20 over the front surface portion 20A and the first inclined portion 20C.
- Reference numeral 21 denotes a left cylinder mounting plate provided on the left side of the front surface of the front plate 20.
- the left cylinder mounting plate 21 extends in the front and rear directions and is erected from the front bottom plate 13 to the first inclined portion 20C of the front plate 20. ing.
- the left cylinder mounting plate 21 faces the left cylinder mounting plate portion 16 provided on the left bracket portion 14A of the left front vertical plate 14.
- the left cylinder mounting plate 21 is joined to the upper left side of the front bottom plate 13 and the front left side of the front plate 20 using welding means.
- the front end portion of the left cylinder mounting plate 21 is provided with a left cylinder pin insertion hole 21A for inserting a left cylinder connecting pin.
- the left cylinder pin insertion hole 21 ⁇ / b> A is disposed so as to face the left cylinder pin insertion hole 16 ⁇ / b> A provided in the left cylinder mounting plate 16.
- Reference numeral 22 denotes a right cylinder mounting plate provided on the front right side of the front plate 20, and the right cylinder mounting plate 22 extends in the front and rear directions in the same manner as the left cylinder mounting plate 21 described above and extends from the front bottom plate 13 to the front plate 20.
- the first inclined portion 20C is erected.
- the right cylinder mounting plate 22 faces the right cylinder mounting plate portion 19 and is joined to the right upper surface of the front bottom plate 13 and the front right side of the front plate 20 using welding means.
- the front end of the right cylinder mounting plate 22 is provided with a right cylinder pin insertion hole 22A for inserting the right cylinder connecting pin 28.
- the right cylinder pin insertion hole 22A is connected to the right cylinder pin insertion hole 19A. It is arranged facing each other.
- Reference numerals 23 and 24 denote outer reinforcing plates provided on the outer surfaces of the front portions of the left and right front vertical plates 14 and 17, respectively.
- the outer reinforcing plates 23 and 24 are respectively provided to the left and right front vertical plates 14 and 17.
- the boom pin insertion holes 15A, 18A and the cylinder pin insertion holes 16A, 19A are joined to the outer surface of the part (the parts to become the left and right bracket portions 14A, 17A), and the thickness of the part Is to increase.
- Reference numerals 25 and 26 denote inner reinforcing plates respectively provided on the inner inner surfaces of the upper portions of the left and right front vertical plates 14 and 17.
- the inner reinforcing plates 25 and 26 correspond to the left and right front vertical plates 14 and 17, respectively. Among them, it is joined to the inner side surface of the portion where the boom pin insertion holes 15A, 18A are formed (the portions to be the left and right boom mounting plate portions 15, 18), and the thickness of the portion is increased.
- Reference numeral 27 denotes a boom connecting pin for rotatably supporting the foot part of the lower boom 5A on the left and right boom mounting plate parts 15 and 18, and the boom connecting pin 27 is inserted into the left and right boom pins. It is inserted through the holes 15A and 18A.
- Reference numeral 29 denotes a rod-side right cylinder connecting pin that rotatably supports the tip end side (rod side) of the right boom cylinder 5E on the lower boom 5A.
- the tail frame 30 indicates a tail frame connected to the rear side of the center frame 12.
- the tail frame 30 is generally composed of left and right I-shaped beams 31 and 32, a rear bottom plate 33, and a pair of horizontal plates 34, which will be described later.
- Reference numerals 31 and 32 denote left and right I-type beams connected to the left and right front vertical plates 14 and 17 and the front bottom plate 13 of the center frame 12, respectively. It is formed in a letter shape. These I-type beams 31 and 32 are arranged on the rear side of the left and right front vertical plates 14 and 17 so as to extend in the front and rear directions with an interval in the left and right directions.
- the left I-shaped beam 31 includes a left rear vertical plate 31A extending in the front and rear directions, and an upper flange portion that is joined to the upper end edge of the left rear vertical plate 31A using welding means and extends in the front and rear directions. It is formed by 31B and the lower flange part 31C which is joined to the lower end edge of the left rear vertical board 31A using a welding means and extends in the front and rear directions.
- the right I-shaped beam 32 is formed by a right rear vertical plate 32A, an upper flange portion 32B, and a lower flange portion 32C in the same manner as the left I-shaped beam 31.
- the front end side of the tail frame 30 is connected to the rear end of the center frame 12 by welding means.
- the front edge of each rear vertical plate 31A, 32A is the rear edge of each front vertical plate 14, 17, and the front end of each upper flange 31B, 32B is the rear end of each front vertical plate 14, 17.
- the front end edges of the lower flange portions 31C and 32C and the front end edge of the rear bottom plate 33 described later are joined to the rear end edge of the front bottom plate 13, respectively.
- the height dimension B of the front ends of the upper flange portions 31B and 32B is larger than the height dimension A of the boom pin insertion holes 15A and 18A. (See Equation 1).
- Reference numeral 33 denotes a rear bottom plate that connects the lower ends of the left and right I-shaped beams 31 and 32.
- the rear bottom plate 33 is formed in a flat plate shape with a steel plate or the like, and the lower flange portions 31C of the I-shaped beams 31 and 32 are provided. It is joined to 32C using welding means.
- Two openings 33A and 33B are formed in the rear bottom plate 33, and maintenance of equipment mounted on the engine or the like can be performed from the lower side of the upper swing body 4 through the openings 33A and 33B.
- Reference numeral 34 denotes a pair of horizontal plates that connect the I-type beams 31 and 32 at two positions in the middle of the left and right I-type beams 31 and 32. And is joined to the upper surface of the rear bottom plate 33 and the vertical plates 31A and 32A, the upper flange portions 31B and 32B, and the lower flange portions 31C and 32C of the I-type beams 31 and 32 using welding means.
- Each of these horizontal plates 34 is provided with a total of four engine support brackets 34A (see FIGS. 2 to 4), and each engine support bracket 34A has an anti-vibration mount (not shown). The engine is supported via
- Reference numeral 35 denotes a left side frame which is attached to the left side of the center frame 12 and the tail frame 30.
- the left side frame 35 has a D-shaped cross section and extends in the front and rear directions, and the left D frame 36 and the left D frame 36.
- a plurality of left extending beams 37 provided between the center frame 12 and the tail frame 30 and extending in the left and right directions, a cab support frame 38 for supporting the cab 6, and the like.
- Reference numeral 39 denotes a right side frame attached to the right side position of the center frame 12 and the tail frame 30.
- the right side frame 39 has a D-shaped cross section and extends in the front and rear directions.
- the right D frame 40 and the right D frame 40 The center frame 12 and the tail frame 30 are provided with a plurality of right extending beams 41 extending leftward and rightward.
- the center frame 12 'of the comparative example shown in FIGS. 10 and 11 constitutes the tail frame 30' with the boom pin insertion holes 15A 'and 18A' of the left and right boom mounting plate portions 15 'and 18'. It is provided at a position higher than the front ends of the upper flange portions 31B 'and 32B' of the I-shaped beams 31 'and 32'. That is, in the case of the comparative example, the height dimension from the front bottom plate 13 'to the hole center of the boom pin insertion holes 15A', 18A 'is Ap, and the front end of the upper flange portions 31B', 32B 'from the front bottom plate 13'. Assuming that the height dimension up to Bp is Bp, the height dimension Ap is set larger than the height dimension Bp as shown in Equation 2 below.
- the height dimension from the front bottom plate 13 to the hole center of the boom pin insertion holes 15A, 18A is A, and from the front bottom plate 13
- the height dimension A is set smaller than the height dimension B as shown in the above equation (1).
- the distance between the center of the left and right cylinder pin insertion holes 16A, 21A, 19A, 22A and the center of the boom pin insertion holes 15A, 18A is C.
- D be the horizontal distance.
- the horizontal distance D is set larger than the horizontal distance Dp in the configuration of the comparative example shown in FIGS. Yes.
- the distance between the center of the left and right cylinder pin insertion holes 16A 'and 19A' and the center of the boom pin insertion holes 15A 'and 18A' in the comparative example is Cp.
- the horizontal distance is Dp.
- the horizontal distance D according to the present embodiment shown in FIG. 8 is set to be larger than the horizontal distance Dp according to the comparative example (see Expression 3).
- the separation dimension C according to the present embodiment is approximately the same as the separation dimension Cp according to the comparative example. Is set. That is, in the present embodiment, the horizontal distance D is set to be larger than the horizontal distance Dp according to the comparative example corresponding to the height dimension A lower than the height dimension Ap (several numbers). 3).
- the distance E is set smaller than the distance Ep of the configuration of the comparative example shown in FIGS.
- the center line Sp-Sp of the center frame 12 'and the center frame 12' turn before and after passing through the middle between the left front vertical plate 14 'and the right front vertical plate 17'.
- a distance from the center Op (horizontal interval) is set to Ep.
- the distance E according to the present embodiment shown in FIG. 9 is set smaller than the distance Ep according to the comparative example (see Expression 4).
- the engagement (positional relationship) of the left front vertical board 14 and the right front vertical board 17 with respect to the turning wheel 3 can be approached equally in the left and right directions, and the twist of the center frame 12 can be reduced. Can do.
- the hydraulic excavator 1 has the above-described configuration.
- the hydraulic excavator 1 travels on a general road or the like by the lower traveling body 2 and thus self-travels to the work site, and then the upper swing body 4.
- the excavation work of earth and sand is performed by moving the working device 5 up and down while turning.
- the center frame 12 when excavation work or the like is being performed by the work device 5, a large load such as excavation reaction force is applied to the left and right front vertical plates 14 and 17 of the center frame 12 supporting the work device 5.
- the center frame 12 has a height dimension A from the front bottom plate 13 to the center of the boom pin insertion holes 15A, 18A, and the upper flanges of the I-shaped beams 31, 32 from the front bottom plate 13. part 31B, is set to be smaller than the height B to the front end of 32B.
- the height dimension from the front bottom plate 13 to the foot portion of the lower boom 5A can be reduced, and the torsional moment, bending moment, etc. applied to the left and right front vertical plates 14, 17 from the lower boom 5A can be reduced accordingly. .
- the center frame 12 can be made small and light.
- the height position of the foot portion of the lower boom 5A can be lowered, the height of the excavator 1 as a whole can also be lowered. Therefore, for example, even when a trailer loaded with the hydraulic excavator 1 travels on a public road, this height dimension can be easily kept within a range regulated by laws and the like.
- the left and right cylinder pin insertion holes 16A, 21A corresponding to the reduced height dimension A from the front bottom plate 13 to the hole center of the boom pin insertion holes 15A, 18A. , 19A, 22A and the distance D in the horizontal direction between the boom pin insertion holes 15A, 18A. Therefore, in this embodiment, a large separation dimension C between the hole centers of the cylinder pin insertion holes 16A, 21A, 19A, and 22A and the boom pin insertion holes 15A and 18A can be secured.
- the distance E between the center line SS in the rear direction and the turning center O of the center frame 12 is set small before passing through the middle between the left front vertical plate 14 and the right front vertical plate 17. Therefore, in the present embodiment, the engagement (positional relationship) between the left front vertical plate 14 and the right front vertical plate 17 with respect to the turning wheel 3 can be made to approach equally in the left and right directions. As a result, the swivel wheel 3 can receive the force applied from the front vertical plates 14 and 17 via the front bottom plate 13 in a state that is closer to the left and right directions, and torsion of the center frame 12 is reduced. Can do. That is, the center frame 12 can be advantageously configured in terms of strength.
- the horizontal distance D between the hole centers of the cylinder pin insertion holes 16A, 21A, 19A, and 22A and the boom pin insertion holes 15A and 18A is set large as in the present embodiment. Then, the protruding amount (overhang amount) to the front side of the base end portion of each boom cylinder 5E increases. However, in the present embodiment, by setting the distance E to be small, the deviation amount (offset amount) of each boom cylinder 5E with respect to the turning center O is reduced so that the strength of the center frame 12 as a whole can be secured. Yes.
- the front plate 20 that connects the front side between the left and right front vertical plates 14 and 17 is bent at two locations.
- the strength of the front plate 20 can be improved as compared with the front plate 20 ′ formed by bending at one place as in the comparative example shown in FIGS.
- the hydraulic excavator 1 having the two-piece boom specification working device 5 in which the boom is divided into the lower boom 5A and the upper boom 5B has been described as an example.
- the present invention is not limited to this.
- the present invention can be applied to a hydraulic excavator including a mono-boom specification working device constituted by a single boom.
- the wheel-type hydraulic excavator 1 having the wheels 2B as the construction machine has been described as an example. It may be applied to construction machinery.
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Body Structure For Vehicles (AREA)
- Shovels (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
Description
2 下部走行体
4 上部旋回体
5 作業装置
5A ロアブーム(ブーム)
5E ブームシリンダ
11 旋回フレーム
12,12′ センタフレーム
13,13′ 前底板
14,14′ 左前縦板
14A 左ブラケット部
15A,15A′ 左ブーム用ピン挿通孔
16A,21A,16A′ 左シリンダ用ピン挿通孔
17,17′ 右前縦板
17A 右ブラケット部
18A,18A′ 右ブーム用ピン挿通孔
19A,22A,19A′ 右シリンダ用ピン挿通孔
20,20′ 前板
20B 第1の折曲げ部
20D 第2の折曲げ部
30,30′ テールフレーム
31,32,31′,32′ 左,右のI型ビーム
31A,32A 左,右の後縦板
31B,32B,31B′,32B′ 上フランジ部
31C,32C 下フランジ部
33 後底板
A,Ap 高さ寸法
B,Bp 高さ寸法
C,Cp 離間寸法
D,Dp 水平方向の距離
E,Ep 距離
O,Op 旋回中心
S-S,Sp-Sp 中心線
Claims (5)
- 下部走行体(2)と、該下部走行体(2)上に旋回可能に搭載された上部旋回体(4)と、該上部旋回体(4)の前部側に俯仰動可能に設けられた作業装置(5)とを備え、
前記上部旋回体(4)を構成する旋回フレーム(11)のセンタフレーム(12)を、前底板(13)と、該前底板(13)上に前,後方向に延びると共に左,右方向に間隔をもって立設され前部側が前記作業装置(5)のブーム(5A)とブームシリンダ(5E)とをピン結合するブラケット部(14A,17A)となった左,右の前縦板(14,17)とにより構成し、
前記センタフレーム(12)の後部側に接続されるテールフレーム(30)を、前記各前縦板(14,17)の後部に接合される左,右のI型ビーム(31,32)と、該各I型ビーム(31,32)の間を連結する後底板(33)とにより構成し、
前記左,右のI型ビーム(31,32)は、前,後方向に延び前端が前記各前縦板(14,17)に接合される左,右の後縦板(31A,32A)と、該各後縦板(31A,32A)の上側に設けられ前,後方向に延び前端が前記各前縦板に接合される上フランジ部(31B,32B)と、前記各後縦板(31A,32A)の下側に設けられ前,後方向に延び前端が前記前底板(13)に接合される下フランジ部(31C,32C)とにより形成してなる建設機械において、
前記センタフレーム(12)のブラケット部(14A,17A)には、前記ブーム(5A)のフート部をピン結合するブーム用ピン挿通孔(15A,18A)を設け、
前記前底板(13)から前記ブーム用ピン挿通孔(15A,18A)の孔中心までの高さ寸法を(A)とし、前記前底板(13)から前記上フランジ部(31B,32B)の前端までの高さ寸法を(B)とした場合に、高さ寸法(A)を高さ寸法(B)よりも小さく設定したことを特徴とする建設機械。 - 前記センタフレーム(12)のブラケット部(14A,17A)には、前記ブーム用ピン挿通孔(15A,18A)よりも前側で、かつ下側となる位置に、前記ブームシリンダ(5E)をピン結合するシリンダ用ピン挿通孔(16A,19A)を設け、
前記高さ寸法(A)を高さ寸法(B)よりも小さく設定した場合における前記シリンダ用ピン挿通孔(16A,19A)の孔中心と前記ブーム用ピン挿通孔(15A,18A)の孔中心との離間寸法を(C)とすると共に水平方向の距離を(D)とし、
比較対象として前底板(13′)からブーム用ピン挿通孔(15A′,18A′)の孔中心までの高さ寸法(Ap)を前底板(13′)から上フランジ部(31B′,32B′)の前端までの高さ寸法(Bp)よりも大きくした場合におけるシリンダ用ピン挿通孔(16A′,19A′)の孔中心とブーム用ピン挿通孔(15A′,18A′)の孔中心との離間寸法を(Cp)とすると共に水平方向の距離を(Dp)とした場合に、
前記離間寸法(C)が前記離間寸法(Cp)と同程度になるように、前記高さ寸法(A)を前記高さ寸法(Ap)よりも低くした分に対応して、前記距離(D)を前記距離(Dp)よりも大きく設定してなる請求項1に記載の建設機械。 - 前記高さ寸法(A)を高さ寸法(B)よりも小さく設定した場合における前記センタフレーム(12)の左前縦板(14)と右前縦板(17)の中間を通る前,後方向の中心線(S-S)と前記センタフレーム(12)の旋回中心(O)との距離を(E)とし、
比較対象として前底板(13′)からブーム用ピン挿通孔孔(15A′,18A′)の孔中心までの高さ寸法(Ap)を前底板(13′)から上フランジ部(31B′,32B′)の前端までの高さ寸法(Bp)よりも大きくした場合におけるセンタフレーム(12′)の左前縦板(14′)と右前縦板(17′)の中間を通る前,後方向の中心線(Sp-Sp)とセンタフレーム(12′)の旋回中心(Op)との距離を(Ep)とした場合に、
前記距離(E)を前記距離(Ep)よりも小さく設定してなる請求項1に記載の建設機械。 - 前記センタフレーム(12)のブラケット部(14A,17A)には、前記ブーム用ピン挿通孔(15A,18A)よりも前側で、かつ下側となる位置に、前記ブームシリンダ(5E)をピン結合するシリンダ用ピン挿通孔(16A,19A)を設け、
前記高さ寸法(A)を高さ寸法(B)よりも小さく設定した場合における前記シリンダ用ピン挿通孔(16A,19A)の孔中心と前記ブーム用ピン挿通孔(15A,18A)の孔中心との離間寸法を(C)とし、水平方向の距離を(D)とすると共に、前記センタフレーム(12)の左前縦板(14)と右前縦板(17)の中間を通る前,後方向の中心線(S-S)と前記センタフレーム(12)の旋回中心(O)との距離を(E)とし、
比較対象として前底板(13′)からブーム用ピン挿通孔(15A′,18A′)の孔中心までの高さ寸法(Ap)を前底板(13′)から上フランジ部(31B′,32B′)の前端までの高さ寸法(Bp)よりも大きくした場合におけるシリンダ用ピン挿通孔(16A′,19A′)の孔中心とブーム用ピン挿通孔(15A′,18A′)の孔中心との離間寸法を(Cp)とし、水平方向の距離を(Dp)とすると共に、センタフレーム(12′)の左前縦板(14′)と右前縦板(17′)の中間を通る前,後方向の中心線(Sp-Sp)とセンタフレーム(12′)の旋回中心(Op)との距離を(Ep)とした場合に、
前記離間寸法(C)が前記離間寸法(Cp)と同程度になるように、前記高さ寸法(A)を前記高さ寸法(Ap)よりも低くした分に対応して、前記距離(D)を前記距離(Dp)よりも大きく設定し、かつ、前記距離(E)を前記距離(Ep)よりも小さく設定してなる請求項1に記載の建設機械。 - 前記左,右の前縦板間(14,17)の前部側には、左,右方向に延びて該左,右の前縦板(14,17)間を連結する前板(20)を設け、
該前板(20)には、前,後方向の2箇所で折曲げられた第1の折曲げ部(20B)と第2の折曲げ部(20D)を設ける構成としてなる請求項1に記載の建設機械。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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EP11819702.9A EP2610406A1 (en) | 2010-08-26 | 2011-07-13 | Construction machine |
RU2013113177/03A RU2013113177A (ru) | 2010-08-26 | 2011-07-13 | Строительная машина |
JP2012530584A JPWO2012026233A1 (ja) | 2010-08-26 | 2011-07-13 | 建設機械 |
KR1020127033586A KR20130124168A (ko) | 2010-08-26 | 2011-07-13 | 건설기계 |
CN2011800344352A CN103003497A (zh) | 2010-08-26 | 2011-07-13 | 工程机械 |
US13/696,466 US20130149094A1 (en) | 2010-08-26 | 2011-07-13 | Construction machine |
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JP2010-189426 | 2010-08-26 | ||
JP2010189426 | 2010-08-26 |
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PCT/JP2011/065962 WO2012026233A1 (ja) | 2010-08-26 | 2011-07-13 | 建設機械 |
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US (1) | US20130149094A1 (ja) |
EP (1) | EP2610406A1 (ja) |
JP (1) | JPWO2012026233A1 (ja) |
KR (1) | KR20130124168A (ja) |
CN (1) | CN103003497A (ja) |
RU (1) | RU2013113177A (ja) |
WO (1) | WO2012026233A1 (ja) |
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US9428503B2 (en) | 2014-05-08 | 2016-08-30 | Astrazeneca Ab | Imidazo[4,5-c]quinolin-2-one compounds and their use in treating Cancer |
JP2017036586A (ja) * | 2015-08-10 | 2017-02-16 | 株式会社神戸製鋼所 | 旋回フレーム、およびそれを備えた作業機械 |
JP2020165126A (ja) * | 2019-03-28 | 2020-10-08 | 日立建機株式会社 | 油圧ショベル |
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JP5810822B2 (ja) * | 2011-10-17 | 2015-11-11 | コベルコ建機株式会社 | 建設機械のアッパーフレーム |
JP5786885B2 (ja) * | 2013-04-09 | 2015-09-30 | コベルコ建機株式会社 | 建設機械のスイングブラケット |
US9296436B2 (en) * | 2013-08-28 | 2016-03-29 | Caterpillar Global Mining America Llc | Multi-purpose machine chassis |
JP6297905B2 (ja) * | 2014-04-22 | 2018-03-20 | 日立建機株式会社 | 建設機械 |
JP6531505B2 (ja) * | 2015-06-11 | 2019-06-19 | 株式会社タダノ | 伸縮ブームの取付構造 |
CN107635907B (zh) * | 2015-06-11 | 2019-06-21 | 株式会社多田野 | 伸缩臂的安装结构 |
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JP7208878B2 (ja) * | 2019-09-12 | 2023-01-19 | 株式会社日立建機ティエラ | 建設機械 |
CN114406620B (zh) * | 2022-01-27 | 2023-09-08 | 江苏润邦重工股份有限公司 | 一种液压型抓料机主体钢结构件的生产制造工艺 |
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- 2011-07-13 JP JP2012530584A patent/JPWO2012026233A1/ja active Pending
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US20130149094A1 (en) | 2013-06-13 |
CN103003497A (zh) | 2013-03-27 |
KR20130124168A (ko) | 2013-11-13 |
RU2013113177A (ru) | 2014-10-10 |
JPWO2012026233A1 (ja) | 2013-10-28 |
EP2610406A1 (en) | 2013-07-03 |
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