EP2423393A1 - Structure de protection de cabine pour machine de construction - Google Patents

Structure de protection de cabine pour machine de construction Download PDF

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Publication number
EP2423393A1
EP2423393A1 EP10766759A EP10766759A EP2423393A1 EP 2423393 A1 EP2423393 A1 EP 2423393A1 EP 10766759 A EP10766759 A EP 10766759A EP 10766759 A EP10766759 A EP 10766759A EP 2423393 A1 EP2423393 A1 EP 2423393A1
Authority
EP
European Patent Office
Prior art keywords
cab
boom
protection
protection member
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Withdrawn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
EP10766759A
Other languages
German (de)
English (en)
Other versions
EP2423393A4 (fr
Inventor
Eiji Akahane
Shigeru Kojima
Makoto Hasuike
Yuichiro Tanaka
Tetsuji Takaoka
Hidetomo Ikeda
Tsuyoshi Miyakita
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.)
Caterpillar SARL
Original Assignee
Caterpillar SARL
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 Caterpillar SARL filed Critical Caterpillar SARL
Publication of EP2423393A1 publication Critical patent/EP2423393A1/fr
Publication of EP2423393A4 publication Critical patent/EP2423393A4/fr
Withdrawn legal-status Critical Current

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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
    • E02F9/24—Safety devices, e.g. for preventing overload
    • 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
    • E02F9/16—Cabins, platforms, or the like, for drivers
    • E02F9/163—Structures to protect drivers, e.g. cabins, doors for cabins; Falling object protection structure [FOPS]; Roll over protection structure [ROPS]

Definitions

  • the present invention relates to a cab protection structure that protects a cab of a construction machine such as a hydraulic shovel and the like in the event that a machine body of the construction machine topples.
  • a boom which is a working attachment cab be mounted to swing up and down upon a machine body in a construction machine such as a hydraulic shovel.
  • a cab can be adjacently mounted at one side in a right and left direction of the boom.
  • the cab is less likely to be tilted even if the machine body topples toward the boom. It is because the boom can function to protect the cab. However, the cab may directly impact to be tilted toward the boom if the machine body topples toward the cab. More specifically, the cab can be prevented from being severely tilted toward the boom if the boom is in a raised posture. It is because the boom, when viewed from a side, may overlap with an upper portion of a front supporting column and a roof portion of the cab, and therefore the boom can function as a protection member to support the upper portion of the cab. In contrast, the cab may be severely tilted if the boom is in a lowered posture. It is because the boom may overlap with only a lower portion of the front supporting column of the cab when viewed from the side, and therefore nothing may support the upper portion of the cab.
  • a truss structure is formed to function as a cab protection member in order to prevent the cab from being deformed.
  • the truss structure is formed by using a main protection member and auxiliary protection members.
  • a pair of main frames pivotally support a base end portion of the boom.
  • the main protection member stands so as to project above an upper surface of the cab.
  • the auxiliary protection members stand so as to support the main protection member.
  • Patent Document 1 Japanese Published Unexamined Patent Application No. 2005-350948
  • the protection members which stand upon the pair of main frames, have top ends connected with each other. Vibrations, which occur when the machine body travels or works, are likely to result in shaking in varying degrees corresponding to differences in a length and a mounting angle between the main protection member and the auxiliary protection members. Accordingly, a spherical bearing is installed to a bearing portion of the auxiliary protection members so as to absorb loads generated by the varying vibrations.
  • this arrangement is undesirable because of a complex structure and a larger number of parts.
  • the protection members stand upon not only one of the main frames at the side of the cab but also upon the other main frame in order to secure desired strength.
  • the protection member at the other main frame needs to be arranged rearward enough to be outside a swing range of the boom.
  • the cab protection member in itself thus protects only a rear part of the cab, and therefore a front upper half portion of the cab is left unprotected especially when the boom is in a lower posture. In short, the cab is still prone to be readily tilted.
  • the protection members are provided so as to step over and bridge between the pair of the main frames.
  • installation of other members and devices to the main frames must be limited because of the protection members. Workability is also significantly decreased at the time of maintenance. The problems are to be solved by the present invention.
  • the present invention has been made with the object of resolving those problems in view of the above-mentioned circumstances, and a first aspect of the present invention provides a cab protection structure in a construction machine.
  • the construction machine includes a boom mounted upon a machine body so as to swing up and down and a cab provided at one side in a right and left direction of the boom.
  • a protection member is provided to protect the cab in the event that the machine body topples.
  • the protection member is provided upon the boom so as to project above an upper surface of the boom and to be positioned to overlap with a front supporting column region of the cab in a side view when the boom is at least in a lowered posture.
  • a second exemplary aspect of the present invention provides the cab protection structure in the construction machine according to the first exemplary aspect, in which the protection member is mounted to at least either one of the upper surface or a side surface of the boom.
  • a third exemplary aspect of the present invention provides the cab protection structure in the construction machine according to the first or second exemplary aspect, in which the protection member has at least a plate surface parallel to a side surface of the boom.
  • a fourth exemplary aspect of the present invention provides the cab protection structure in the construction machine according to the first, second, or third exemplary aspect, in which the protection member includes a pair of plate members with a plate surface parallel to a side surface of the boom, the plate members being separating and facing each other, and a reinforcing member provided between the plate members.
  • a fifth exemplary aspect of the present invention provides the cab protection structure in the construction machine according to the fourth exemplary aspect, in which the protection member is formed to be a gate shape with an internal space formed by the pair of plate members and the reinforcing member.
  • a sixth exemplary aspect of the present invention provides the cab protection structure in the construction machine according to the first or second exemplary aspect, in which the protection member includes a cab-side plate member with a surface inclined further in a direction of being away from the cab as the plate member extends upward further, and a reinforcing member which is inclined so as to extend substantially perpendicularly from an upper end portion of the plate member to the boom.
  • a seventh exemplary aspect of the present invention provides the cab protection structure in the construction machine according to the fifth or sixth exemplary aspect, in which the protection member includes a pass-through portion in the internal space formed by the plate members and the reinforcing member so as to provide piping and wiring upon the upper surface of the boom through the pass-through portion.
  • the protection member along with the boom support the cab by the boom upper surface so as to prevent the cab from toppling.
  • the cab can thus be prevented from being deformed or damaged.
  • the protection member along with the boom support the cab by pressing into contact with a front supporting column portion and a roof portion of the cab.
  • a front portion in the cab corresponding to a front of a user is protected more securely. This is excellent in safety of a user, securing a wider movable range, an easier escape from the cab, etc.
  • the protection member is provided upon the boom. This avoids a case in which a protection member is arranged upon an upper portion of the main frames, an apparatus is increased in size, and the boom is deteriorated by a restriction on positioning of other devices or difficulty of maintenance.
  • a tilted cab is supported integrally by the boom and the protection member, with a resultant reliable support for the cab.
  • the protection member reliably supports the cab because the plate members are reinforced by the reinforcing member.
  • the protection member is no obstacle for other members and devices to be installed. Furthermore, an opposite side of the protection member can be seen through upon the boom, with a resultant sustainable efficient maintenance work, etc.
  • an inclined cab side surface can be supported widely by means of surface contact, with a resultant further reliable support for the cab.
  • piping and wiring which are placed through the pass-through portion are protected by the protection member even if the machine body topples.
  • the piping and the like can thus be prevented from being damaged or fractured to leak oil due to contact with the cab in the event that the machine body topples.
  • the piping and the like are provided upon the boom upper surface simply through the pass-through portion of the protection member. This prevents an obstacle to the installation upon the boom upper surface even when the protection member is mounted thereon.
  • a hydraulic shovel 1 includes a crawler-type lower traveling body 2, an upper rotating body 3 rotatably supported upon the lower traveling body 2, a boom 4 mounted upon the upper rotating body 3, and so on. These structures may be conventionally arranged.
  • a cab 5 which secures a user space is arranged upon an upper portion of the upper rotating body 3 at one side (the left, for example) in a right and left direction of the boom 4.
  • the cab 5 is mounted upon the upper rotating body 3 by the intermediary of a viscous mount not shown.
  • a rotating frame 6 is a mount base of the upper rotating body 3.
  • a pair of right and left main frames 7R and 7L are provided to the rotating frame 6 so as to extend in a front-back direction of the rotating frame 6, as illustrated in FIG. 2 .
  • a base end portion of the boom 4 is supported at a front portion of the main frames 7R and 7L so as to be swingable in an upper and lower direction.
  • a base end portion of right and left boom cylinders 9R and 9L is also supported at a front portion of the main frames 7R and 7L so as to be swingable in an upper and lower direction.
  • the boom 4 swings by the right and left boom cylinders 9R and 9L.
  • a protection member 10 which is an example of a first embodiment of the present invention, is arranged upon an upper surface 4a of the boom 4, as shown in FIG. 3 and FIG. 4 .
  • the protection member 10 is formed such that a pair of plate members 11a and 11b, parallel to boom side surfaces 4b and 4c, are arranged to stand upon respective end portions of the upper surface 4a in its width direction and to face each other.
  • Another plate member 11c connects with each upper portion of the pair of plate members 11a and 11b.
  • the protection member 10 thus forms a gate shape.
  • a platy reinforcing member 12 is installed into an inner surface of the gate shape so as to be orthogonal to the boom upper surface 4a and the boom side surface 4b.
  • the platy reinforcing member 12 also has left, right, and upper end portions fixed respectively to inner surfaces of the plate members 11a, 11b, and 11c.
  • the protection member 10, which comprises the plate members 11a, 11b and 11c, and the reinforcing member 12, is thus provided to be positioned in a side view so as to cover (overlap with) a front supporting column 5a or a roof portion 5b of the cab 5 within a swing range of the boom 4.
  • a notched portion 12a which is an example of a pass-through portion of the present invention, is formed at a lower central portion of the reinforcing member 12.
  • a space S is formed by the notched portion 12a and the boom upper surface 4a.
  • a piping 13 which serves as an oil passage can be provided through the space S. Electrical wiring, etc., can also be provided through the space S.
  • the hydraulic shovel 1 is viewed from a side as illustrated in FIGS. 5A, 5B and 5C .
  • the boom 4 and the protection member 10 overlap with a lower portion to a central portion of the front supporting column 5a of the cab 5 if the boom 4 is positioned at a most lowered position (see FIG. 5A ).
  • the boom 4 and the protection member 10 overlap with the central portion to an upper portion of the front supporting column 5a of the cab 5 if the boom 4 is positioned at a halfway position (see FIG. 5B ).
  • the boom 4 and the protection member 10 overlap with the roof portion 5b of the cab 5 if the boom 4 is positioned at a raised position (see FIG. 5C ).
  • the protection member 10 is provided upon the upper surface 4a of the boom 4 such that the protection member 10 within the swing range of the boom 4 constantly overlaps with the front supporting column 5a or the roof portion 5b of the cab 5 in the side view.
  • the boom 4 may be positioned at in the event that a machine body topples
  • the cab 5 that is tilted is thus pressed into contact with the boom 4 and the protection member 10.
  • the front supporting column 5a of the cab 5 is pressed into contact with both the boom 4 and the protection member 10 so as to support the cab 5 even if the boom 4 is positioned at a lowered position.
  • the cab 5 can thus be securely supported in any swing states of the boom 4 in the event of toppling.
  • front supporting column 5a or the roof portion 5b of the cab 5a that corresponds to a region being pressed into contact with the boom 4 and the protection member 10 in the event of the machine body toppling.
  • a front portion of the cab 5 is thus more protected and advantageous over a conventional structure in which a rear portion of the cab 5 is designed to be protected.
  • the protection member 10 is mounted upon the boom upper surface 4a, the piping 13 and the like, which are often placed upon the boom upper surface 4a, can be provided thereon through the notched portion 12a, the pass-through portion formed in the reinforcing member 12.
  • the reinforcing member 12 can provide its reinforcement to the inner surfaces of the plate members 11a, 11b, and 11c because the protection member 10 is arranged to bridge between the each end portion of the upper surface 4a of the boom 4.
  • the protection member 10 as a whole can thus be simplified and downsized.
  • the piping 13 and the like, which are placed to penetrate through the notched portion 12a, are protected by the protection member 10. Therefore, even if the machine body topples, the piping 13 is prevented from being hit against by the cab 5, the oil passage is prevented from being fractured to effuse oil, and the electrical wiring and the like are also prevented from being disconnected.
  • the protection member 10 is arranged upon the boom upper surface 4a in the above-mentioned embodiment of the present invention, which is not restricted as such.
  • a protection member 14 is illustrated in FIGS. 6A and 6B as in a second embodiment.
  • the protection member 14 is arranged to stand toward an upper side of the boom 4 such that plate members 15a and 15b are supported by and parallel to the boom side surfaces 4b and 4c.
  • a cab is supported by the plate members 15a and 15b together with the boom side surface 4b.
  • a plate member 15c bridges between the plate member 15a and the plate member 15b to form a gate shape as a whole.
  • a reinforcing member 16 is provided to include a notched portion 16a as a pass-through portion at a lower central surface portion. This is also similar to the first embodiment.
  • a protection member 17 is illustrated in FIGS. 7A and 7B as in a third embodiment.
  • the protection member 17 includes a plate member 18 and a reinforcing member 19.
  • the plate member 18 is arranged to stand upon a side of the side surface 4b of the upper surface 4a of the boom 4 so as to be inclined further in a direction of being away from a cab as the plate member 18 extends upward further.
  • An upper end portion 19a of the reinforcing member 19 is connected with an upper end portion 18a of the plate member 18 such that the upper end portion 19a is substantially orthogonal to the plate member 18.
  • a lower end portion 19b of the reinforcing member 19 is connected with the boom 4 at a side end portion of the boom side surface 4c on the boom upper surface 4a.
  • a pass-through portion 20 is formed in an internal space which is formed by the plate member 18 and the reinforcing member 19. Piping of oil passages and electrical wiring can be provided upon the boom upper surface 4a through the pass-through portion 20.
  • the plate member 18 can be inclined in advance at a similar angle to angle of gradient of a cab side surface 5c based upon an assumption that a cab 5 is tilted. Accordingly, the plate member 18 can receive the tilted cab side surface 5c in a surface contact state, which allows for a further secures support of the cab 5. Moreover, the reinforcing member 19 can function as a beam because the reinforcing member 19 is substantially orthogonal to the plate member 18. An advanced cab supporting structure is thus provided.
  • the reinforcing member may be formed in a shape of a plate or a rod, and also may be single or plural.
  • the present invention is applicable for cab protection structures in construction machines such as hydraulic shovels to prevent cabs from being deformed and damaged in the event that machine bodies tip over, for example.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
EP10766759A 2009-04-20 2010-01-27 Structure de protection de cabine pour machine de construction Withdrawn EP2423393A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009101612A JP2010248846A (ja) 2009-04-20 2009-04-20 建設機械におけるキャブ保護構造
PCT/JP2010/000448 WO2010122696A1 (fr) 2009-04-20 2010-01-27 Structure de protection de cabine pour machine de construction

Publications (2)

Publication Number Publication Date
EP2423393A1 true EP2423393A1 (fr) 2012-02-29
EP2423393A4 EP2423393A4 (fr) 2012-11-07

Family

ID=43010826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10766759A Withdrawn EP2423393A4 (fr) 2009-04-20 2010-01-27 Structure de protection de cabine pour machine de construction

Country Status (3)

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EP (1) EP2423393A4 (fr)
JP (1) JP2010248846A (fr)
WO (1) WO2010122696A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11536005B2 (en) 2019-09-26 2022-12-27 Sumitomo Construction Machinery Co., Ltd. Shovel

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2619478C2 (ru) * 2012-02-17 2017-05-16 Дир Энд Компани Защитный узел для транспортных средств повышенной проходимости
JP7306784B2 (ja) * 2019-04-02 2023-07-11 キャタピラー エス エー アール エル 作業機械

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005044642A1 (fr) * 2003-11-10 2005-05-19 Volvo Construction Equipment Holding Sweden Ab Support de cabine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09210251A (ja) * 1996-01-30 1997-08-12 Hitachi Constr Mach Co Ltd 建設機械のフロント配管保持装置
JP2005350948A (ja) 2004-06-10 2005-12-22 Hitachi Constr Mach Co Ltd 油圧ショベルの保護装置
JP2007085017A (ja) * 2005-09-20 2007-04-05 Shin Caterpillar Mitsubishi Ltd 作業機械
JP2008291541A (ja) * 2007-05-25 2008-12-04 Press Kogyo Co Ltd 建設機械

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005044642A1 (fr) * 2003-11-10 2005-05-19 Volvo Construction Equipment Holding Sweden Ab Support de cabine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2010122696A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11536005B2 (en) 2019-09-26 2022-12-27 Sumitomo Construction Machinery Co., Ltd. Shovel

Also Published As

Publication number Publication date
WO2010122696A1 (fr) 2010-10-28
EP2423393A4 (fr) 2012-11-07
JP2010248846A (ja) 2010-11-04

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