JPH11100865A - Cab support device for construction machine - Google Patents

Cab support device for construction machine

Info

Publication number
JPH11100865A
JPH11100865A JP27975697A JP27975697A JPH11100865A JP H11100865 A JPH11100865 A JP H11100865A JP 27975697 A JP27975697 A JP 27975697A JP 27975697 A JP27975697 A JP 27975697A JP H11100865 A JPH11100865 A JP H11100865A
Authority
JP
Japan
Prior art keywords
cab
buffer
spring constant
supports
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.)
Granted
Application number
JP27975697A
Other languages
Japanese (ja)
Other versions
JP3891514B2 (en
Inventor
Hiroshi Shimogaichi
宏 下垣内
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.)
Kobelco Construction Machinery Co Ltd
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Yutani Heavy Industries 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 Kobe Steel Ltd, Yutani Heavy Industries Ltd filed Critical Kobe Steel Ltd
Priority to JP27975697A priority Critical patent/JP3891514B2/en
Publication of JPH11100865A publication Critical patent/JPH11100865A/en
Application granted granted Critical
Publication of JP3891514B2 publication Critical patent/JP3891514B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To improve a structural maintenance property by adjusting at least one side of structural spring constants and buffer carrier spring constants to set the spring constants to the predetermined relation, and making the spring constants of all support sections equal. SOLUTION: Layout position sections (a)-(d) of multiple buffer carriers are set on the deck section of the revolving frame 26 of an upper revolving superstructure, and a cab is mounted on a deck section 8 via four buffer carriers. The spring constants of the buffer members used for the buffer carriers are set different so that the sum of the spring constant of each of the layout position sections (a)-(d) determined in advance and the spring constant of each buffer carrier arranged at the layout position sections (a)-(d) becomes an equal value. A buffer carrier having a small spring constant is arranged at a layout position section having a large spring constant among the layout position sections (a)-(d), and a buffer carrier having a large spring constant is arranged at a layout position section having a small spring constant, thereby balanced vibration is applied to the support portions of the cab, the distortion of the cab can be suppressed to the minimum, and its structural maintenance property is improved.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、油圧ショベルなど
建設機械,作業車両に装備している運転室用キャブの支
持装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supporting a cab for a driver's cab mounted on a construction machine such as a hydraulic shovel or a work vehicle.

【0002】[0002]

【従来の技術】図10は、実開平2−45881号公報
に記載されている一実施例防振装置を示す断面図であ
る。図11は、図10に示す防振装置の原理図である。
図11において、1はプラットフォーム、4は運転室で
その間に2つのバネ定数k1の弾性ゴム5aとバネ定数
k2の弾性ゴム5bがとりつけられている。また前記弾
性ゴム5a及び5bとは別個に、ダンパ6を設けてい
る。13は箱体で、ブラケット14でプラットフォーム
1上に固設され、上部はバネ定数k3の弾性ゴム15を
介し運転室4にボルト16により取付けらえている。前
記のような構成であるから、高速走行時の共振対策には
比較的低いバネ定数k3のバネ5c(図11におけるバ
ネ5cであるが、図10における弾性ゴム15と同じ)
とダンパ6を使用し、走行時の石への乗り上げ又は掘削
時の突発的ショック時等には大きなバネ定数k1又はk
2等の作用するゾーンを使用することになるので、高速
時の乗り心地が改良されると共に、掘削時等の突発的シ
ョックによる大変位を防止することができる。
2. Description of the Related Art FIG. 10 is a sectional view showing an example of a vibration isolator disclosed in Japanese Utility Model Laid-Open No. 2-45881. FIG. 11 is a principle diagram of the vibration isolator shown in FIG.
In FIG. 11, reference numeral 1 denotes a platform, and 4 denotes an operator's cab, between which two elastic rubbers 5a having a spring constant k1 and two elastic rubbers 5b having a spring constant k2 are attached. Further, a damper 6 is provided separately from the elastic rubbers 5a and 5b. Numeral 13 denotes a box, which is fixed on the platform 1 with a bracket 14 and whose upper part is attached to the cab 4 by a bolt 16 via an elastic rubber 15 having a spring constant k3. With the above-described configuration, the spring 5c having a relatively low spring constant k3 (the spring 5c in FIG. 11, but the same as the elastic rubber 15 in FIG. 10) is used as a countermeasure against resonance during high-speed running.
The spring constant k1 or k can be increased by using the damper 6 when riding on a rock during running or sudden shock during excavation.
The use of zones that act on the second and the like improves the riding comfort at high speeds, and prevents large displacement due to a sudden shock such as during excavation.

【0003】また図12は、特開平3−96527号公
報に記載されている一実施例運転室18の支持構造を示
す要部断面図である。図12に示す支持構造では、運転
室18の前部左右を上部旋回体34のフレーム33に配
設した4個の緩衝支持体9’,10’,11’,12’
で支持し、また前記フレーム33の運転室後部両側位置
にサポート部材22,23を設け、運転室18の重心
(床板21上面より寸法Hの高さに重心Gが存在する)
近くを、上記サポート部材22,23と緩衝支持体2
4,25にて支持するようにしている。
FIG. 12 is a cross-sectional view of a main part showing a support structure of an operator's cab 18 according to an embodiment described in Japanese Patent Application Laid-Open No. 3-96527. In the support structure shown in FIG. 12, four shock-absorbing supports 9 ′, 10 ′, 11 ′, and 12 ′ disposed on the frame 33 of the upper swing body 34 at the front left and right of the cab 18.
In addition, support members 22 and 23 are provided on both sides of the rear portion of the cab of the frame 33, and the center of gravity of the cab 18 (the center of gravity G exists at a height of dimension H from the upper surface of the floor plate 21).
Near the support members 22 and 23 and the buffer support 2
4, 25 support.

【0004】[0004]

【発明が解決しようとする課題】図10及び図11に示
す従来技術の一実施例防振装置では、建設機械の高速走
行時の共振対策には比較的低いバネ定数k3のバネ5c
とダンパ6を使用して高速走行時における運転室4の共
振を防ぎ、高速時の乗り心地の改良を図るようにし、ま
た走行時の石への乗り上げ、又は掘削時の突発的ショッ
ク時にはバネ定数k1(バネ5a)又はk2(バネ5
b)の作用するゾーンを使用して大変位を防ぐようにし
ている。しかし前記バネ5a,5b,5c、及びダンパ
6のプラットフォーム1に対する配置の記載はされてい
ない。通常、前記プラットフォーム1は車体中央部を支
点として片持状態(いわゆるオーバハングの状態)に形
成されているので、前記バネ5a,5b,5c、及びダ
ンパ6の配置されているプラットフォーム1の各配置位
置部の、前記車体中央部に対するバネ定数の値はそれぞ
れ相異なっている。そのために前記各配置位置に緩衝用
のバネ又はダンパをそれぞれ配置すると、運転室4を支
持している複数個の支持部分の各バネ定数がまちまちな
値のものとなる。したがって前記建設機械の走行時,掘
削時には前記各支持部分にアンバランスな振動が作用す
るとともに、運転室4を歪形させるような変位が発生す
る。運転室4の構造強度に悪影響を及ぼし、運転室4が
破損を生じるようになるので、メンテナンス上、非常に
具合が悪い。
In the vibration isolator according to one embodiment of the prior art shown in FIGS. 10 and 11, the spring 5c having a relatively low spring constant k3 is used as a measure against resonance when the construction machine is running at high speed.
And the damper 6 prevent resonance of the driver's cab 4 during high-speed running, so as to improve riding comfort at high speeds. Also, a spring constant at the time of climbing on a stone during running or a sudden shock during excavation. k1 (spring 5a) or k2 (spring 5
A large displacement is prevented by using the zone where b) operates. However, the arrangement of the springs 5a, 5b, 5c and the damper 6 with respect to the platform 1 is not described. Usually, since the platform 1 is formed in a cantilever state (a so-called overhang state) with the center of the vehicle body as a fulcrum, each arrangement position of the platform 1 on which the springs 5a, 5b, 5c and the damper 6 are arranged is provided. The values of the spring constants of the portion with respect to the central portion of the vehicle body are different from each other. Therefore, if a buffer spring or a damper is disposed at each of the above-described positions, the spring constants of the plurality of supporting portions supporting the cab 4 will have different values. Therefore, when the construction machine travels or excavates, unbalanced vibrations act on the respective support portions, and a displacement that distorts the cab 4 occurs. This adversely affects the structural strength of the driver's cab 4 and causes the driver's cab 4 to be damaged.

【0005】また図12に示す従来技術の一実施例運転
室18の支持構造では、いずれも弾性ゴムをそなえ、形
状,構造が同じ6個の緩衝支持体9’〜12’、24,
25をフレーム33及びサポート部材22,23に対
し、計6箇所の位置に配置している。前記緩衝支持体
9’〜12’,24,25のそれぞれバネ定数はすべて
同一の値と思われるが、前記フレーム33及びサポート
部材22,23の前記計6箇所の各配置部分の車体中央
部に対するバネ定数はそれぞれ相異なっている。したが
って前記運転室18の支持構造の場合も、前記図10及
び図11に示す防振装置の場合と同様な作用が行われる
ので、前記運転室18の構造メンテナンス上、非常に具
合が悪い。本発明は、運転室を支持している複数個所の
支持部がすべて同等のバネ定数をそれぞれそなえること
によって、運転室用のキャブの構造メンテナンス性を向
上させるようにした建設機械のキャブ支持装置を提供す
ることを目的とする。
[0005] Further, in the supporting structure of the operator's cab 18 shown in Fig. 12 of one embodiment of the prior art, all of them have elastic rubber and have six identical cushioning supports 9 'to 12', 24, and 24, which have the same shape and structure.
25 are arranged at a total of six positions with respect to the frame 33 and the support members 22 and 23. Although the spring constants of the buffer supports 9 'to 12', 24, and 25 are all assumed to be the same value, the six arrangement positions of the frame 33 and the support members 22 and 23 with respect to the central portion of the vehicle body. The spring constants are different from each other. Therefore, also in the case of the support structure of the cab 18, since the same operation as in the case of the vibration isolator shown in FIGS. 10 and 11 is performed, the condition of the cab 18 is very poor in terms of structural maintenance. The present invention provides a cab support device for a construction machine in which a plurality of support portions supporting an operator's cab all have the same spring constant, thereby improving the structure maintainability of the cab for the operator's cab. The purpose is to provide.

【0006】[0006]

【課題を解決するための手段】上部旋回体を構成する構
造体と、前記構造体上に配置された複数の緩衝支持体
と、前記複数の緩衝支持体を介して前記構造体上に搭載
されたキャブとを有し、前記複数の緩衝支持体それぞれ
の配置位置において前記構造体自身が前記上部旋回体に
設定された支点より片持ち状に支持されることにより有
する構造体バネ定数と、前記複数の緩衝支持体それぞれ
の有する緩衝支持体バネ定数とのそれぞれ合計値を前記
緩衝支持体それぞれの配置位置における前記キャブ緩衝
用のバネ定数とし、前記複数の緩衝支持体の配置位置そ
れぞれの前記キャブ緩衝用のバネ定数が予め定められた
関係となるように、前記構造体バネ定数と前記緩衝支持
体バネ定数の少なくとも一方のバネ定数を調整設定する
ようにした。
A structure constituting an upper revolving structure, a plurality of buffer supports disposed on the structure, and mounted on the structure via the plurality of buffer supports. Having a cab, the structure itself having a structure in which the structure itself is supported in a cantilever manner from a fulcrum set on the upper revolving structure at the arrangement position of each of the plurality of buffer supports, and The sum of the respective spring constants of the plurality of cushioning supports and the respective spring constants of the plurality of cushioning supports is defined as the spring constant for cab cushioning at the position of the cushioning support. At least one of the spring constant of the structural body and the spring constant of the buffer support is adjusted and set so that the spring constant for cushioning has a predetermined relationship.

【0007】上部旋回体のキャブを搭載する構造体では
支点からの距離(剛性体からの距離、或いは旋回軸受か
らの距離)が離れた位置ほど構造体自体が有するバネ定
数は低くなり、逆に支点からの距離が近いほどバネ定数
は高くなる。この構造体バネ定数を把握して、キャブを
支持する緩衝支持体のバネ定数と構造体バネ定数を合計
したバネ定数をキャブ緩衝用のバネ定数として捉えるこ
とで各緩衝支持体の配置位置でのキャブを緩衝支持する
ための適切なバネ定数を得ることができる。これはキャ
ブ自体の重量バランスや建設機械の振動特性を考慮した
バネ定数を設定することが可能である。またこのバネ定
数の調整は前記構造体の剛性を調整するか、或いはバネ
定数の異なる緩衝支持体を適宜用いることで容易且つ確
実に行える。
[0007] In a structure on which the cab of the upper revolving unit is mounted, the spring constant of the structure itself decreases as the distance from the fulcrum (the distance from the rigid body or the distance from the revolving bearing) increases. The shorter the distance from the fulcrum, the higher the spring constant. By grasping this structure spring constant, the spring constant of the buffer support supporting the cab and the sum of the structure spring constants is regarded as the spring constant for the cab buffering, so that the position of each buffer support is determined. An appropriate spring constant for buffering and supporting the cab can be obtained. This makes it possible to set the spring constant in consideration of the weight balance of the cab itself and the vibration characteristics of the construction machine. Further, the adjustment of the spring constant can be easily and surely performed by adjusting the rigidity of the structure or by appropriately using a buffer support having a different spring constant.

【0008】また、前記複数の緩衝支持体は、弾性特性
の相違するものが複数設定され、これを選択的に使用す
るようにした。これにより構造体の剛性が相違する他機
種であっても適用が可能である。また弾性特性として振
動減衰性をもった緩衝支持体を設定しておけば、より適
切な緩衝効果を得ることができる。より具体的には前記
緩衝支持体の緩衝部材として弾性ゴムを用いているもの
は前記弾性ゴムのバネ定数を変えるようにし、また前記
緩衝支持体として、ケーシング内部に液体が封入されて
振動減衰性を発揮するようにしたダンパでは、そのバネ
定数を変えることによって、前記設定を容易に行うこと
ができ、複数の弾性特性を有する緩衝支持体を得ること
ができる。
In addition, a plurality of cushion supports having different elastic characteristics are set, and these are selectively used. Accordingly, the present invention can be applied to other models having different structural rigidities. In addition, if a buffer support having a vibration damping property as an elastic property is set, a more appropriate buffer effect can be obtained. More specifically, in the case where the elastic rubber is used as the cushioning member of the cushioning support, the spring constant of the elastic rubber is changed, and as the cushioning support, a liquid is sealed inside the casing to reduce the vibration damping property. By setting the spring constant of the damper, the above setting can be easily performed, and a buffer support having a plurality of elastic characteristics can be obtained.

【0009】また、前記複数の緩衝支持体の配置位置そ
れぞれのキャブ緩衝用のバネ定数が略同一となるように
した。このように設定することで、建設機械が走行或い
は掘削を行う時には、前記キャブの各支持部分にバラン
スのとれた振動が作用するので、前記キャブの歪形を最
小限度に抑えることができる。
In addition, the cab cushion spring constants at the respective positions of the plurality of cushioning supports are substantially the same. With this setting, when the construction machine travels or excavates, balanced vibration acts on each support portion of the cab, so that the distortion of the cab can be suppressed to a minimum.

【0010】また、前記構造体を前記上部旋回体の旋回
軸受を支点として支持される片持ち状として捉えること
により、上部旋回体全体の弾性特性を考慮することがで
き、よりキャブへ作用する振動をバランスの良いものと
することができる。更に、構造体を板状部材により構成
されるデッキ部として、前記複数の緩衝支持体は前記デ
ッキ部にそれぞれ配置した場合には、デッキ部のバネ定
数の支点との距離による差は大きくなることから、より
本願発明の上記効果が顕著に得られる。上部旋回体のフ
レーム全体を板材で形成した場合もこれに含まれる。
Further, the structure can be considered as a cantilever supported by the swing bearing of the upper swing body as a fulcrum, so that the elastic characteristics of the entire upper swing body can be taken into consideration, and the vibration acting on the cab can be further improved. Can be balanced. Further, when the structure is a deck portion composed of a plate-like member, and the plurality of buffer supports are arranged on the deck portion, respectively, the difference between the spring constant of the deck portion and the distance from the fulcrum becomes large. Therefore, the above effects of the present invention can be more remarkably obtained. This includes the case where the entire frame of the upper swing body is formed of a plate material.

【0011】通常、運転室用のキャブは、複数個所(例
えば4箇所,6箇所など)の緩衝支持体を介して上部旋
回体の構造体である旋回フレームのデッキ部に取付けら
れている。この場合、前記デッキ部における前記緩衝支
持体用の複数箇所の配置位置部の内、車体中央部より最
も離れた距離にある配置位置部の、車体中央部を支点と
するバネ定数は最も低い(小さい)。逆に車体中央部に
最も近い距離にある配置位置部の、車体中央部を支点と
するバネ定数はもっとも高い(大きい)。したがって前
記デッキ部の複数箇所の配置位置部の内、バネ定数の小
さい配置位置部に対してバネ定数の大きい緩衝支持体
を、またバネ定数の大きい配置位置部に対してバネ定数
の小さい緩衝支持体をそれぞれ配置することにより、前
記各配置位置部の構造体バネ定数と、前記各配置位置部
に配置される前記各緩衝支持体の緩衝支持体バネ定数を
それぞれ加えた各値が、各々同等の値となる。したがっ
て本発明のキャブ支持装置を装備した建設機械が走行或
いは掘削を行う時には、前記キャブの各支持部分にバラ
ンスのとれた振動が作用するので、前記キャブの歪形を
最小限度に抑えることができるのである。また、前記各
配置位置部の構造体バネ定数と、前記各配置位置部に配
置される前記各緩衝支持体の緩衝支持体バネ定数をそれ
ぞれ加えた各値を、キャブ自身の重量バランスや、建設
機械の振動特性を考慮して変化を付けた値に設定するこ
とにより、より乗り心地の向上を図れる場合もある。
Usually, the cab for the driver's cab is mounted on the deck portion of the revolving frame, which is the structure of the upper revolving structure, via a plurality of (for example, four or six) buffer supports. In this case, of the plurality of arrangement positions for the buffer support in the deck portion, the arrangement position located at the farthest distance from the vehicle body center has the lowest spring constant with the vehicle body center as a fulcrum ( small). Conversely, the spring constant of the arrangement position closest to the vehicle body center portion with the vehicle body center portion as a fulcrum is the highest (larger). Therefore, among the plurality of arrangement positions of the deck portion, a buffer support having a large spring constant is provided for an arrangement position having a small spring constant, and a buffer support having a small spring constant is provided for an arrangement position having a large spring constant. By arranging the bodies respectively, the structure spring constant of each of the arrangement positions and the respective values obtained by adding the buffer support spring constants of the respective buffer supports arranged at the respective arrangement positions are respectively equal. Value. Therefore, when the construction machine equipped with the cab support device of the present invention travels or excavates, balanced vibration is applied to each support portion of the cab, so that the distortion shape of the cab can be minimized. It is. The values obtained by adding the structure spring constants of the respective arrangement positions and the buffer support spring constants of the respective buffer supports arranged at the respective arrangement positions are respectively used to determine the weight balance of the cab itself and the construction. In some cases, the ride comfort can be further improved by setting the value to a value that is changed in consideration of the vibration characteristics of the machine.

【0012】[0012]

【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて詳細に説明する。図1は、本発明の一実施形
態のキャブ支持装置をそなえた油圧ショベルの左側面図
である。図において、2は油圧ショベルの下部走行体、
3は下部走行体2の上部に旋回軸受7を介して連設され
た上部旋回体、8は上部旋回体3の構造体である旋回フ
レーム(図示では見えないが後述する)のデッキ部、1
7はデッキ部8の上方に載設された運転室、19は運転
室17を構成するキャブ、20は上部旋回体3の前部に
装着した作業アタッチメントである。図2は、図1にお
ける油圧ショベルの右側面図である。なお図2に示すよ
うに、デッキ部8の前端は上部旋回体3の右側の前端イ
より寸法Yだけ前方へ突出して形成されている。図3
は、図1における油圧ショベルの平面図である。図4
は、図1における油圧ショベルの上部旋回体3の旋回フ
レーム26を示す平面図である。図において、a,b,
c,dは後述する複数個(本実施形態では4個にしてい
る)の緩衝支持体をそれぞれ取付けるために旋回フレー
ム26のデッキ部8に設けた配置位置部である。図5
は、図4のAより見た要部左側面図である。
Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a left side view of a hydraulic excavator provided with a cab support device according to one embodiment of the present invention. In the drawing, 2 is a lower traveling body of a hydraulic shovel,
Reference numeral 3 denotes an upper revolving unit connected to the upper part of the lower traveling unit 2 via a revolving bearing 7, and 8 denotes a deck portion of a revolving frame (not shown in the figure but described later) which is a structure of the upper revolving unit 3.
Reference numeral 7 denotes an operator's cab mounted above the deck section 8, reference numeral 19 denotes a cab constituting the operator's cab 17, and reference numeral 20 denotes a work attachment mounted on a front portion of the upper revolving unit 3. FIG. 2 is a right side view of the excavator in FIG. 1. As shown in FIG. 2, the front end of the deck portion 8 is formed so as to protrude forward by a dimension Y from the right front end A of the upper swing body 3. FIG.
FIG. 2 is a plan view of the excavator in FIG. 1. FIG.
FIG. 2 is a plan view showing a swing frame 26 of the upper swing body 3 of the hydraulic shovel in FIG. 1. In the figure, a, b,
c and d are arrangement positions provided on the deck portion 8 of the revolving frame 26 for attaching a plurality of (four in the present embodiment) buffer supports to be described later. FIG.
FIG. 5 is a left side view of a main part viewed from A in FIG. 4.

【0013】図6は、図5における配置位置部a,b,
c,dのいずれかに配置した状態の一実施形態の緩衝支
持体27を示す断面図である。図において、28はキャ
ブ19の支持板、29は緩衝支持体27の取付板、3
0,30’はそれぞれ緩衝部材である弾性ゴム、31は
カバー金具、32はボルトである。図7は、図6の原理
図である。図8は、図5における配置位置部a,b,
c,dのいずれかに配置した状態の他実施形態の緩衝支
持体35を示す断面図である。図において、28はキャ
ブ19の支持板、29’は緩衝支持体35の取付板、3
6は緩衝支持体35のケーシング、37はケーシング3
6の軸心部に設けられているたて軸、38はたて軸37
をケーシング36に連結している弾性ゴム、39はケー
シング36内部にシリコンオイルなどの高粘性液が封入
されているダンパ、40はたて軸37の下端部に取付け
られているダンパ39の振動減衰用プレート、41は振
動減衰用プレート40に開穿されているオリフィス、4
2はたて軸37と支持板28とを固定しているボルトで
ある。図9は、図8の原理図である。
FIG. 6 shows the arrangement positions a, b, and b in FIG.
It is sectional drawing which shows the buffer support 27 of one Embodiment of the state arrange | positioned at either of c and d. In the drawing, 28 is a support plate of the cab 19, 29 is a mounting plate of the buffer support 27, 3
Reference numerals 0 and 30 'denote elastic rubbers serving as cushioning members, 31 denotes a cover, and 32 denotes a bolt. FIG. 7 is a principle diagram of FIG. FIG. 8 shows the arrangement position portions a, b,
It is sectional drawing which shows the buffer support body 35 of other embodiment of the state arrange | positioned at either c or d. In the figure, 28 is a support plate of the cab 19, 29 'is a mounting plate of the buffer support 35, 3
6 is a casing of the buffer support 35, 37 is a casing 3
6, a vertical shaft 38 provided at the shaft center portion of the vertical shaft 37;
Is connected to the casing 36, 39 is a damper in which a highly viscous liquid such as silicone oil is sealed inside the casing 36, and 40 is a vibration damper of the damper 39 attached to the lower end of the vertical shaft 37. Plate 41 is an orifice formed in the vibration damping plate 40,
Reference numeral 2 denotes a bolt fixing the vertical shaft 37 and the support plate 28. FIG. 9 is a principle diagram of FIG.

【0014】次に、本実施形態のキャブ支持装置の構成
を図1〜図9について述べる。本実施形態では、上部旋
回体3の旋回フレーム26のデッキ部8に複数個(本実
施形態では4個)の緩衝支持体(4個とも図6に示す緩
衝支持体27を用いてもよいし、また4個とも図8に示
す緩衝支持体35を用いてもよいし、或いはまた緩衝支
持体27と35とを組み合わせて計4個になるようにし
てもよい)の配置位置部a,b,c,d(図4に示す)
を設定し、前記4個の緩衝支持体を介して運転室17用
のキャブ19を前記デッキ部8に搭載している油圧ショ
ベルにおいて、前記上部旋回体3の下面部の旋回軸受7
を支点とした前記デッキ部8の前記各配置位置部a,
b,c,dのバネ定数(kfa,kfb,kfc,kf
d)をそれぞれ求め(構造的振動解析手段による)、前
記各配置位置部a,b,c,dのバネ定数kf(バネ定
数はそれぞれkfa,kfb,kfc,kfdである
が、説明の都合上、代表してkfとした)と、前記各配
置位置部a,b,c,dに配置される前記各緩衝支持体
のバネ定数(緩衝支持体27のバネ定数がkmで、緩衝
支持体35のバネ定数がkm’である)をそれぞれ加え
た各値が、各々同等の値koとなるように設定した。そ
して前記の場合、前記緩衝支持体(27,35)の緩衝
部材として弾性ゴム(30,30’,38)を用いてい
るものに対して前記弾性ゴムのバネ定数をそれぞれ相異
なるもの(前記加え算によっては同一の場合もあり得る
が、それらも含める)に設定し、また前記緩衝支持体
(35)として、ケーシング36内部に液体が封入され
て振動減衰性を発揮するようにしたダンパ39を用いて
いるものに対し前記ダンパ39のバネ定数をそれぞれ相
異なるものに設定した。
Next, the configuration of the cab support device of the present embodiment will be described with reference to FIGS. In the present embodiment, a plurality (four in the present embodiment) of buffer supports (four in this embodiment) may be used for the deck portion 8 of the revolving frame 26 of the upper revolving unit 3 (all four buffer supports 27 shown in FIG. 6). Alternatively, the buffer supports 35 shown in FIG. 8 may be used, or the buffer supports 27 and 35 may be combined to provide a total of four). , C, d (shown in FIG. 4)
In a hydraulic shovel in which a cab 19 for a driver's cab 17 is mounted on the deck portion 8 via the four buffer supports, the slewing bearing 7 on the lower surface of the upper slewing body 3 is provided.
Each of the arrangement positions a,
b, c, d spring constants (kfa, kfb, kfc, kf
d) is determined (by the structural vibration analysis means), and the spring constants kf of the respective arrangement positions a, b, c, d (spring constants are kfa, kfb, kfc, kfd, respectively, for convenience of explanation) , Representatively kf) and the spring constants of the respective buffer supports (the spring constant of the buffer support 27 is km and the buffer support 35) Are set to be equal to each other. In the case described above, the elastic rubber (30, 30 ', 38) is used as a cushioning member of the cushioning support (27, 35), and the elastic rubber has a different spring constant (the additional member). Depending on the calculation, the same may be included, but these are also included), and a damper 39 in which a liquid is sealed inside the casing 36 so as to exhibit vibration damping properties is provided as the buffer support (35). The spring constant of the damper 39 was set to be different from that used.

【0015】次に、本実施形態のキャブ支持装置の作用
について述べる。本実施形態においてキャブ19は、4
箇所の緩衝支持体(27又は35)を介して旋回フレー
ム26のデッキ部8に取付けられている。この場合、前
記デッキ部8における4箇所の配置位置部a,b,c,
dの内、車体中央部の旋回軸受7より最も離れた距離に
ある配置位置部aの、前記旋回軸受7を支点とするバネ
定数は最も小さい。逆に前記旋回軸受7に最も近い距離
にある配置位置部dの、前記旋回軸受7を支点とするバ
ネ定数は最も大きい。したがって前記配置部a,b,
c,dの内、バネ定数の大きい配置位置部に対してバネ
定数の大きい緩衝支持体を、またバネ定数の大きい配置
位置部に対してバネ定数の小さい緩衝支持体をそれぞれ
配置することにより、前記各配置部a,b,c,dのバ
ネ定数(バネ定数はそれぞれkfa,kfb,kfc,
kfdであるが、図7及び図9では代表してkfにして
いる)と、前記各配置位置部a,b,c,dに配置され
る前記各緩衝支持体27又は35のバネ定数km又はk
m’をそれぞれ加えた各値が、各々同等の値koとな
る。なお前記各緩衝支持体(27,35)の緩衝部材と
して弾性ゴム(30,30’,38)を用いているもの
は前記弾性ゴム(30,30’,38)のバネ定数を変
えるようにし、また前記緩衝支持体(35)として、ケ
ーシング36内部に液体が封入されて振動減衰性を発揮
するようにしたダンパ39では、そのバネ定数を変える
ことによって、前記バネ定数koの設定を容易に行うこ
とができる。したがって本発明のキャブ支持装置を装備
した油圧ショベルが走行或いは掘削を行う時には、前記
キャブ19の各支持部分(図6及び図8に示す支持板2
8の支持部分)にバランスのとれた振動が作用するの
で、前記キャブ19の歪形を最小限度に抑えることがで
きる。すなわち油圧ショベルの走行時,掘削時に生じる
衝撃などがキャブ19の構造強度に悪影響を及ぼさない
ようになるので、キャブ19の構造メンテナンス性を向
上させることができる。
Next, the operation of the cab support device of the present embodiment will be described. In the present embodiment, the cab 19
It is attached to the deck portion 8 of the revolving frame 26 via the buffer support (27 or 35) at the location. In this case, four arrangement positions a, b, c,
Among the positions d, the spring constant with the fulcrum of the slewing bearing 7 as the fulcrum is the smallest at the arrangement position a located farthest from the slewing bearing 7 in the center of the vehicle body. Conversely, the spring constant of the arrangement position d closest to the slewing bearing 7 with the slewing bearing 7 as a fulcrum is the largest. Therefore, the arrangement parts a, b,
By arranging a buffer support having a large spring constant for an arrangement position having a large spring constant and a buffer support having a small spring constant for an arrangement position having a large spring constant among c and d, The spring constant of each of the arrangement portions a, b, c, d (spring constants are kfa, kfb, kfc,
7 and FIG. 9, it is represented by kf), and the spring constant km or the spring constant of each of the buffer supports 27 or 35 disposed at the respective arrangement positions a, b, c, and d. k
Each value obtained by adding m ′ becomes an equivalent value ko. When the elastic rubber (30, 30 ', 38) is used as a buffer member of each of the buffer supports (27, 35), the spring constant of the elastic rubber (30, 30', 38) is changed. Further, in the damper 39 in which a liquid is sealed inside the casing 36 so as to exhibit vibration damping as the buffer support (35), the spring constant ko can be easily set by changing the spring constant. be able to. Therefore, when the hydraulic excavator equipped with the cab support device of the present invention travels or excavates, each support portion of the cab 19 (the support plate 2 shown in FIGS.
Since the balanced vibration acts on the supporting portion 8), the distortion of the cab 19 can be minimized. That is, impacts or the like generated during traveling or excavation of the excavator do not adversely affect the structural strength of the cab 19, so that the structure maintenance of the cab 19 can be improved.

【0016】[0016]

【発明の効果】本発明のキャブ支持装置を装備した建設
機械が走行或いは掘削を行う時には、前記キャブの各支
持部分にバランスのとれた振動が作用するので、前記キ
ャブの歪形を最小限度に抑えることができる。すなわち
建設機械の走行時,掘削時の生じる緩衝などがキャブの
構造強度に悪影響を及ぼさないようになるので、キャブ
の構造メンテナンス性を向上させることができる。また
乗り心地の向上を図ることもできる。
When the construction machine equipped with the cab support device of the present invention travels or excavates, a balanced vibration acts on each support portion of the cab, so that the distortion of the cab is minimized. Can be suppressed. That is, since the buffer generated at the time of running or excavation of the construction machine does not adversely affect the structural strength of the cab, it is possible to improve the structural maintainability of the cab. Also, the ride comfort can be improved.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施形態のキャブ支持装置をそなえ
た油圧ショベルの左側面図である。
FIG. 1 is a left side view of a hydraulic excavator provided with a cab support device according to an embodiment of the present invention.

【図2】図1における油圧ショベルの右側面図である。FIG. 2 is a right side view of the excavator in FIG.

【図3】図1における油圧ショベルの平面図である。FIG. 3 is a plan view of the hydraulic excavator in FIG. 1;

【図4】図1における油圧ショベルの上部旋回体の旋回
フレーム示す平面図である。
FIG. 4 is a plan view showing a swing frame of an upper swing body of the excavator in FIG. 1;

【図5】図4のAより見た要部左側面図である。FIG. 5 is a left side view of a main part viewed from A in FIG. 4;

【図6】図5における配置位置部のいずれかに配置した
状態の一実施形態の緩衝支持体を示す断面図である。
FIG. 6 is a cross-sectional view showing a buffer support according to one embodiment in a state where the buffer support is arranged at any of the arrangement positions in FIG. 5;

【図7】図6の原理図である。FIG. 7 is a principle diagram of FIG. 6;

【図8】図5における配置位置部のいずれかに配置した
状態の他実施形態の緩衝支持体を示す断面図である。
FIG. 8 is a cross-sectional view showing a buffer support according to another embodiment in a state where the buffer support is arranged at any of the arrangement positions in FIG.

【図9】図8の原理図である。FIG. 9 is a principle diagram of FIG. 8;

【図10】従来技術の一実施例防振装置を示す断面図で
ある。
FIG. 10 is a cross-sectional view showing a vibration isolator according to one embodiment of the prior art.

【図11】図10に示す防振装置の原理図である。11 is a principle diagram of the vibration isolator shown in FIG.

【図12】従来技術の一実施例運転室の支持構造を示す
要部断面図である。
FIG. 12 is a cross-sectional view of a main part showing a support structure of a driver's cab according to one embodiment of the prior art.

【符号の説明】[Explanation of symbols]

3,34 上部旋回体 4,17,18 運転室 5a,5b,15,30,30’,38 弾性ゴム 6,39 ダンパ 7 旋回軸受 8 デッキ部 9’,10’,11’,12’,24,25,27,3
5 緩衝支持体 19 キャブ 26 旋回フレーム 36 ケーシング a,b,c,d 配置位置部
3,34 Upper revolving unit 4,17,18 Operator's cab 5a, 5b, 15,30,30 ', 38 Elastic rubber 6,39 Damper 7 Slewing bearing 8 Deck 9', 10 ', 11', 12 ', 24 , 25,27,3
5 Buffer support 19 Cab 26 Revolving frame 36 Casing a, b, c, d Arranged position

Claims (7)

【特許請求の範囲】[Claims] 【請求項1】 上部旋回体を構成する構造体と、前記構
造体上に配置された複数の緩衝支持体と、前記複数の緩
衝支持体を介して前記構造体上に搭載されたキャブとを
有し、前記複数の緩衝支持体それぞれの配置位置におい
て前記構造体自身が前記上部旋回体に設定された支点よ
り片持ち状に支持されることにより有する構造体バネ定
数と、前記複数の緩衝支持体それぞれの有する緩衝支持
体バネ定数とのそれぞれ合計値を前記緩衝支持体それぞ
れの配置位置における前記キャブ緩衝用のバネ定数と
し、前記複数の緩衝支持体の配置位置それぞれの前記キ
ャブ緩衝用のバネ定数が予め定められた関係となるよう
に、前記構造体バネ定数と前記緩衝支持体バネ定数の少
なくとも一方のバネ定数を調整設定するようにしたこと
を特徴とする建設機械のキャブ支持装置。
1. A structure constituting an upper revolving structure, a plurality of buffer supports disposed on the structure, and a cab mounted on the structure via the plurality of buffer supports. A structure spring constant that the structure itself is supported in a cantilever manner from a fulcrum set on the upper revolving structure at an arrangement position of each of the plurality of buffer supports, and the plurality of buffer supports The total value of the spring constants of the cushioning supports of the respective bodies is defined as the cab cushioning spring constant at the position of the cushioning support, and the cab cushioning springs at the respective positions of the plurality of cushioning supports. A construction machine wherein at least one of the structure spring constant and the buffer support spring constant is adjusted and set such that the constant has a predetermined relationship. Cab support device.
【請求項2】 前記複数の緩衝支持体は、弾性特性の相
違するものが複数設定され、これを選択的に使用するよ
うにしたことを特徴とする請求項1記載の建設機械のキ
ャブ支持装置。
2. The cab support device for a construction machine according to claim 1, wherein a plurality of cushioning supports having different elastic characteristics are set, and the plurality of cushioning supports are selectively used. .
【請求項3】 前記複数の緩衝支持体の緩衝部材とし
て、弾性係数の相異する弾性ゴムを設定したことを特徴
とする請求項2記載の建設機械のキャブ支持装置。
3. The cab support device for a construction machine according to claim 2, wherein elastic rubbers having different elastic coefficients are set as buffer members of said plurality of buffer supports.
【請求項4】 前記複数の緩衝支持体として、バネ定数
の相違するバネ部材を有するとともに、ケーシング内部
に液体が封入されて振動減衰性を発揮するようにしたダ
ンパを設定したことを特徴とする請求項2記載の建設機
械のキャブ支持装置。
4. A damper which has a spring member having a different spring constant as said plurality of buffer supports and has a liquid sealed in a casing to exhibit vibration damping properties. The cab support device for a construction machine according to claim 2.
【請求項5】 前記複数の緩衝支持体の配置位置それぞ
れのキャブ緩衝用のバネ定数が略同一となるようにした
ことを特徴とする請求項1〜4記載の建設機械のキャブ
支持装置。
5. The cab support device for a construction machine according to claim 1, wherein the cab buffer spring constants at respective positions of the plurality of buffer supports are substantially the same.
【請求項6】 前記構造体は前記上部旋回体の旋回軸受
を支点として支持されることを特徴とする請求項1〜5
記載の建設機械のキャブ支持装置。
6. The structure according to claim 1, wherein the structure is supported by a slewing bearing of the upper structure.
A cab support device for a construction machine according to the above.
【請求項7】 前記構造体は板状部材により構成される
デッキ部であり、前記複数の緩衝支持体は前記デッキ部
にそれぞれ配置されることを特徴とする請求項1〜6記
載の建設機械のキャブ支持装置。
7. The construction machine according to claim 1, wherein said structure is a deck portion constituted by a plate-like member, and said plurality of buffer supports are arranged on said deck portion, respectively. Cab support device.
JP27975697A 1997-09-27 1997-09-27 Construction machinery cab support device Expired - Fee Related JP3891514B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27975697A JP3891514B2 (en) 1997-09-27 1997-09-27 Construction machinery cab support device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27975697A JP3891514B2 (en) 1997-09-27 1997-09-27 Construction machinery cab support device

Publications (2)

Publication Number Publication Date
JPH11100865A true JPH11100865A (en) 1999-04-13
JP3891514B2 JP3891514B2 (en) 2007-03-14

Family

ID=17615477

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27975697A Expired - Fee Related JP3891514B2 (en) 1997-09-27 1997-09-27 Construction machinery cab support device

Country Status (1)

Country Link
JP (1) JP3891514B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1645493A1 (en) * 2004-10-06 2006-04-12 Volvo Construction Equipment Holding Sweden AB Load support apparatus of driving room for construction equipment and manufacturing method thereof
US7364223B2 (en) 2002-12-11 2008-04-29 Komatsu Ltd. Cab supporting structure
JP2008202253A (en) * 2007-02-17 2008-09-04 Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd Vibrating power generator in construction machine
EP2453063A3 (en) * 2010-11-10 2014-12-03 Kobelco Construction Machinery Co. Ltd. Upper frame for a construction machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7364223B2 (en) 2002-12-11 2008-04-29 Komatsu Ltd. Cab supporting structure
EP1645493A1 (en) * 2004-10-06 2006-04-12 Volvo Construction Equipment Holding Sweden AB Load support apparatus of driving room for construction equipment and manufacturing method thereof
JP2008202253A (en) * 2007-02-17 2008-09-04 Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd Vibrating power generator in construction machine
EP2453063A3 (en) * 2010-11-10 2014-12-03 Kobelco Construction Machinery Co. Ltd. Upper frame for a construction machine

Also Published As

Publication number Publication date
JP3891514B2 (en) 2007-03-14

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