JPH11303139A - Upper structure of construction machine - Google Patents
Upper structure of construction machineInfo
- Publication number
- JPH11303139A JPH11303139A JP12829898A JP12829898A JPH11303139A JP H11303139 A JPH11303139 A JP H11303139A JP 12829898 A JP12829898 A JP 12829898A JP 12829898 A JP12829898 A JP 12829898A JP H11303139 A JPH11303139 A JP H11303139A
- Authority
- JP
- Japan
- Prior art keywords
- pair
- engine
- vertical plates
- strength
- plate
- 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.)
- Pending
Links
Landscapes
- Body Structure For Vehicles (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主として後端の旋
回半径を縮小した小旋回式油圧ショベルなどの建設機械
の上部旋回体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper revolving structure of a construction machine such as a small-swing hydraulic excavator having a reduced turning radius at a rear end.
【０００２】[0002]
【従来の技術】図８は、特開平９−２０９４０１号公報
に記載されている一実施例小旋回式油圧ショベルの上部
旋回体の旋回フレーム６を示す斜視図である。図８に示
す旋回フレーム６は、略円形板状に形成された平板であ
る底板６Ｂと、前記底板６Ｂの幅方向のほぼ中間部に位
置して前後方向に伸長し、作業装置のブーム（図示して
いない）の基端側を回動可能に支持するための支持ブラ
ケットを兼ねた一対のビーム６Ａ，６Ａとから大略構成
されている。そして、前記旋回フレーム６の底板６Ｂ上
の左部側には、運転室を旋回フレーム６上に固定するた
めの固定部６Ｃ，６Ｃ，----が４箇所に設けられ、前記
底板６Ｂの後部側にはエンジンを旋回フレーム６上に固
定するための固定部６Ｄ，６Ｄ，----が４箇所に設けら
れている。また、３３，３３は前記運転室と機械室との
間に位置して前記旋回フレーム６の底板６Ｂ上に設けら
れた仕切板であるが、前記仕切板３３，３３は旋回フレ
ーム６の各ビーム６Ａ，６Ａのうち左側のビーム６Ａか
ら底板６Ｂの左端部にかけて底板６Ｂを幅方向に伸長す
る金属製の長板であり、前記仕切板３３，３３は前記底
板６Ｂに溶接等によって固着されている。そして、前記
各固定部６Ｃ，６Ｃ，----のうち運転室の後側に位置す
る２個の固定部６Ｃ，６Ｃが、また前記各固定部６Ｄ，
６Ｄ，----のうちエンジンの前側に位置する２個の固定
部６Ｄが前記仕切板３３に溶接等の手段で固着されてい
る。2. Description of the Related Art FIG. 8 is a perspective view showing a revolving frame 6 of an upper revolving structure of a small-swing hydraulic excavator according to an embodiment described in Japanese Patent Application Laid-Open No. 9-209401. The revolving frame 6 shown in FIG. 8 is a substantially circular plate-shaped bottom plate 6B, and is located substantially at an intermediate portion in the width direction of the bottom plate 6B and extends in the front-rear direction. (Not shown) and a pair of beams 6A, 6A also serving as a support bracket for rotatably supporting the base end side. On the left side of the bottom plate 6B of the revolving frame 6, fixing portions 6C, 6C,... For fixing the driver's cab on the revolving frame 6 are provided at four places. At the rear side, fixing portions 6D, 6D,... For fixing the engine on the turning frame 6 are provided at four places. Reference numerals 33, 33 denote partitions provided between the operator's cab and the machine room on the bottom plate 6B of the revolving frame 6, and the partitions 33, 33 are beams of the revolving frame 6. 6A, a long metal plate extending in the width direction from the left beam 6A to the left end of the bottom plate 6B of the bottom plate 6B, and the partition plates 33, 33 are fixed to the bottom plate 6B by welding or the like. . The two fixed portions 6C, 6C located at the rear side of the operator's cab among the fixed portions 6C, 6C,.
6D, two fixed portions 6D located on the front side of the engine are fixed to the partition plate 33 by means such as welding.
【０００３】[0003]
【発明が解決しようとする課題】従来より小旋回式油圧
ショベルでは、上部旋回体の平面視形状が略円形（丸
形）に形成され、前記上部旋回体の後部に重量物である
エンジン，カウンタウエイト等が搭載されている。その
場合、例えば図８に示すように旋回フレーム（上部旋回
体の機体フレーム）６は、略円形板状に形成された平板
である底板６Ｂと、前記底板６Ｂの幅方向のほぼ中間部
に位置して前後方向に伸長し、作業装置（作業アタッチ
メントともいう）のブーム（図示していない）の基端側
を回動可能に支持するための支持ブラケットを兼ねた一
対のビーム（強度部材）６Ａ，６Ａとから大略構成され
ている。Conventionally, in a small-slewing hydraulic excavator, an upper revolving structure has a substantially circular shape (round shape) in plan view, and a heavy engine or counter is provided at the rear of the upper revolving structure. Weights are mounted. In this case, for example, as shown in FIG. 8, the revolving frame (body frame of the upper revolving unit) 6 is located at a substantially central portion in the width direction of the bottom plate 6B, which is a flat plate formed in a substantially circular plate shape. A pair of beams (strength members) 6A that extend in the front-rear direction and also serve as support brackets for rotatably supporting a base end side of a boom (not shown) of a working device (also referred to as a working attachment). , 6A.
【０００４】小旋回式の油圧ショベル等では通常上部旋
回体の後部に設定された機関室内での機器配置スペース
がかなり狭盆になってしまう。更に前後方向の強度部材
であるビーム６Ａ，６Ａは機体のほぼ中心で前後方向に
延びているため、エンジンを機関室内に配置しようとし
たとき、これに干渉させないようにする必要があり、機
器配置上での自由度が制約を受けていた。またビームは
強度部材であるのである程度の板厚（ｔ）と高さ（ｈｆ
〜hr）が必要であり、このためこのビーム６Ａ，６Ａ上
にエンジンを配置しようとすると、重心位置が高くなり
安定度の悪影響を与え、また機関室自体も上下方向に大
型化するため、運転室からの後方視界が悪化する恐れが
あった。[0004] In the case of a small-swing hydraulic excavator or the like, the space for disposing the equipment in the engine room, which is usually set at the rear of the upper revolving structure, becomes considerably narrow. Further, since the beams 6A, 6A, which are strength members in the front-rear direction, extend in the front-rear direction substantially at the center of the fuselage, it is necessary to prevent interference when the engine is arranged in the engine room. The above freedom was restricted. Also, since the beam is a strength member, a certain thickness (t) and a certain height (hf
~ Hr) is required. Therefore, when the engine is arranged on the beams 6A, 6B, the position of the center of gravity becomes high, adversely affecting the stability and the engine room itself becomes large in the vertical direction. The rear view from the room might be deteriorated.
【０００５】こうした状況を免れるためには、この前後
方向の強度部材を中間で分割し、この中間の分割部分か
ら後方を機関室内に位置させることにより、左右一対の
補強部材の間隔寸法に自由度を持たせ、搭載されるエン
ジンの形状や固定部の位置に併せて強度部材の位置決め
をするという手段が考えられる。より具体的には、横方
向の強度部材である仕切板３３の部分で分割し、前後方
向の強度部材のうち前部強度部材の後端部を仕切板３３
に溶着し、前後方向の強度部材のうち後部強度部材の前
端部を仕切板３３に溶着することにより、強度部材全体
を（底板６Ｂを含め）一体形にするものである。In order to avoid such a situation, the strength member in the front-rear direction is divided in the middle, and the rear portion from the middle divided portion is located in the engine room, so that the space between the pair of left and right reinforcing members can be freely adjusted. Means for positioning the strength member in accordance with the shape of the mounted engine and the position of the fixed portion. More specifically, it is divided at the part of the partition plate 33 which is a lateral strength member, and the rear end portion of the front strength member among the longitudinal strength members is partitioned by the partition plate 33.
And the front end of the rear strength member of the front-back strength members is welded to the partition plate 33 to make the entire strength member (including the bottom plate 6B) integral.
【０００６】しかしながら、前後方向の強度部材を中間
で分割すると、強度的には不利になる。特に機関室部分
は旋回中心Ｏから離れた位置でエンジン等の重量物を支
えるため、油圧ショベル等の走行時の振動により、仕切
板３３と後部強度部材の接続部分周辺に応力集中が起こ
り、クラックが生じる等の不具合が発生する可能性があ
る。分割しつつ強度を分割しない場合並に維持するため
には、強度部材の強度を上げる（板材であれば板厚
（ｔ）を大寸にする）か、底板（６Ｂ）自体の厚みを大
寸にするか、或いは多数の補強部材を溶着して補強する
等の手段をとる必要がある。これによると、製造コスト
の上昇、部品点数増加による生産性の低下、また不要な
機体重量の増加、といった不都合を伴うこととなる。However, if the longitudinal strength member is divided in the middle, there is a disadvantage in strength. In particular, since the engine room portion supports a heavy object such as an engine at a position distant from the turning center O, vibrations during traveling of a hydraulic shovel or the like cause stress concentration around the connecting portion between the partition plate 33 and the rear strength member, and cracks occur. There is a possibility that a problem such as occurrence of a problem may occur. In order to maintain the strength in the case where the strength is not divided while dividing, the strength of the strength member is increased (if the material is a plate, the thickness (t) is increased) or the thickness of the bottom plate (6B) itself is increased. It is necessary to take measures such as welding or reinforcing a large number of reinforcing members. This involves inconveniences such as an increase in manufacturing cost, a decrease in productivity due to an increase in the number of parts, and an unnecessary increase in machine weight.
【０００７】[0007]
【課題を解決するための手段】下部走行体と、前記下部
走行体上に旋回自在に搭載された上部旋回体と、前記上
部旋回体に起伏自在に設けられた作業アタッチメントを
有する建設機械において、前記上部旋回体は、上部旋回
体前後方向に立設された前記作業アタッチメントを枢支
する左右一対の前部強度部材と、前記一対の縦板と直交
し、かつ前記縦板の後端に接続されて立設された中間強
度部材と、前記横板に前端が接続され、かつ前後方向に
立設された左右一対の後部強度部材と、前記中間強度部
材と、前記後部強度部材とに接続された補強部材とを有
して構成される。A construction machine having a lower traveling structure, an upper revolving structure rotatably mounted on the lower traveling structure, and a work attachment provided on the upper revolving structure to be able to undulate. The upper revolving unit is connected to a pair of left and right front strength members that pivotally support the work attachment erected in the upper revolving unit front-rear direction and to the rear end of the vertical plate orthogonal to the pair of vertical plates. An intermediate strength member that is erected and connected, a front end is connected to the horizontal plate, and a pair of left and right rear strength members that are erected in the front-rear direction, the intermediate strength member, and the rear strength member are connected to each other. And a reinforcing member.
【０００８】これによれば、左右一対の後部強度部材の
相対間隔に自由度があり、上部旋回体上の機器配置スペ
ースを良好に得ることができる。また、補強部材を中間
強度部材と後部強度部材とに亘って接続して設けたの
で、必要最小限の部品の追加により、強度部材や底板の
板厚を厚くすることなく十分な強度を得ることができ
る。[0010] According to this, there is a degree of freedom in the relative spacing between the pair of right and left rear strength members, and a good space for arranging equipment on the upper swing body can be obtained. In addition, since the reinforcing member is provided so as to be connected across the intermediate strength member and the rear strength member, sufficient strength can be obtained without increasing the thickness of the strength member and the bottom plate by adding the necessary minimum parts. Can be.
【０００９】更にまた、前記補強部材は、左右一対の後
部強度部材のそれぞれと前記中間強度部材とに左右それ
ぞれ別個に接続されるとともに、平面視略三角形状を有
する板部材により構成した。これによれば、必要強度に
応じて、所要の板厚の板部材で形成された補強部材の大
きさ（平面視での面積）を調整することができ、このた
め、補強部材は上部旋回体上で上下方向のスペースを占
有せず、各種機器類を配置する際に邪魔にならない。Further, the reinforcing member is formed of a plate member having a substantially triangular shape in a plan view, while being separately connected to the left and right rear strength members and the intermediate strength member, respectively. According to this, it is possible to adjust the size (area in plan view) of the reinforcing member formed of the plate member having a required thickness according to the required strength. It does not occupy the space in the vertical direction above and does not hinder when arranging various devices.
【００１０】或いはまた、前記補強部材は、左右一対の
後部強度部材と前記中間強度部材とに接続されるととも
に、平面視で前方に向けて左右方向中央部を中心として
凹んだ板部材により構成した。これによれば、前述のも
のに比べて部品点数を更に削減できる。Alternatively, the reinforcing member is formed of a plate member connected to the pair of right and left rear strength members and the intermediate strength member, and recessed about the center in the left-right direction toward the front in plan view. . According to this, the number of parts can be further reduced as compared with the above-described one.
【００１１】以上の構成についてより具体的には、前記
左右一対の前部強度部材は前記作業アタッチメントを支
持し、また前記中間強度部材より後方が、エンジンが配
置される機関室に設定されるとともに、前記左右一対の
前部強度部材と、前記左右一対の後部強度部材の少なく
とも一方は前後方向に同一線上に配置されないようにし
た。これにより、機関室内におけるエンジンの配置位置
に自由度が増し、機関室が大型化するのを防ぐことがで
きるとともに、十分な強度を維持することができる。More specifically, the pair of left and right front strength members support the work attachment, and the rear of the intermediate strength member is set in an engine room in which an engine is disposed. At least one of the pair of left and right front strength members and the pair of left and right rear strength members is not arranged on the same line in the front-rear direction. Thereby, the degree of freedom in the arrangement position of the engine in the engine room is increased, and it is possible to prevent the engine room from being enlarged, and to maintain sufficient strength.
【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
態の上部旋回体を装備した小旋回式油圧ショベル１の全
体側面図である。図において、２は油圧ショベル１の下
部走行体、３は下部走行体２上に旋回自在に搭載された
上部旋回体、４は上部旋回体３の左側前部に載置した運
転室用のキャブ、５は上部旋回体３の後部に搭載してい
るエンジン、６はエンジン５等を収納配置する機関室、
７はカウンタウエイト、８は上部旋回体３に起伏自在に
設けられた作業アタッチメント、９は作業アタッチメン
ト８のブームである。図２は、図１における上部旋回体
３の切開要部側面図である。図において、１０は上部旋
回体３の機体フレーム、１１は機体フレーム１０の底板
である下面板、１２は機体フレーム１０を構成する前部
強度部材であり、下面板１１上に立設されブーム９基部
を枢支する一対の前後方向の前部縦板、１３は同様に機
体フレーム１０を構成する後部強度部材である一対の前
後方向後部縦板、１４は前部縦板１２及び後部縦板１３
に直交して立設された左右方向の中間強度部材である横
板，１５ａ，１５ｂ，１５ｃ，１５ｄ（１５ｂ，１５ｄ
はそれぞれ１５ａ，１５ｃの向う側にあるので図示では
見えない）は各キャブ（４）マウント取付部、１６ａ，
１６ｂ，１６ｃ，１６ｄ（１６ｂ，１６ｄはそれぞれ１
６ａ，１６ｃの向う側にあるので図示では見えない）は
各エンジン（５）マウント取付部、１７はカウンタウエ
イト（７）締付固定部、１２ａは前部縦板１２のブーム
（９）基端枢支部である。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall side view of a small swing hydraulic excavator 1 equipped with an upper swing body according to an embodiment of the present invention. In the drawing, reference numeral 2 denotes a lower traveling body of the excavator 1, 3 denotes an upper revolving body rotatably mounted on the lower traveling body 2, and 4 denotes a cab for an operator's cab mounted on a left front portion of the upper revolving body 3. 5, an engine mounted on the rear part of the upper revolving unit 3, 6 an engine room for storing and arranging the engine 5 and the like,
Reference numeral 7 denotes a counterweight, 8 denotes a work attachment provided on the upper swing body 3 so as to be able to move up and down, and 9 denotes a boom of the work attachment 8. FIG. 2 is a side view of a main portion of the upper swing body 3 in FIG. 1. In the drawing, reference numeral 10 denotes a body frame of the upper revolving unit 3, reference numeral 11 denotes a lower plate serving as a bottom plate of the body frame 10, reference numeral 12 denotes a front strength member constituting the body frame 10, and a boom 9 which is erected on the lower plate 11 and stands. A pair of front and rear longitudinal plates 13 pivotally supporting the base, 13 are a pair of front and rear longitudinal plates which are rear strength members similarly constituting the body frame 10, and 14 is a front vertical plate 12 and a rear vertical plate 13.
, 15a, 15b, 15c, 15d (15b, 15d)
Are not shown in the drawing because they are on the opposite sides of 15a and 15c, respectively).
16b, 16c, 16d (16b, 16d are each 1
6a, 16c, so that they are not shown in the drawing) are mount mounting parts for each engine (5), 17 is a counterweight (7) fastening part, and 12a is a boom (9) base end pivot of the front vertical plate 12. It is a branch.
【００１３】図３は、図２における機体フレーム１０を
Ａ−Ａより見た要部平面図である。図において、１８は
左右一対の前部縦板１２と１２の間に固設（溶接固着に
よる）されている前板、１９はスイベルジョイント（図
示していない）取付部、２０Ｌ，２０Ｒはそれぞれ強度
部材である補強板、２１は後部縦板後端側支持板、中心
０は上部旋回体３の旋回中心、２２は旋回レースであり
ベアリングを介在させて上部旋回体３と下部走行体２を
旋回自在に連結している。図４は、図３のＢ−Ｂより見
た図である。図５は、図２〜図４に示す機体フレーム１
０の要部斜視図である。図６は、図５のＣ部拡大詳細図
である。FIG. 3 is a plan view of a main part of the body frame 10 shown in FIG. In the drawing, reference numeral 18 denotes a front plate fixedly provided (by welding and fixing) between a pair of left and right front vertical plates 12 and 12, reference numeral 19 denotes a swivel joint (not shown) mounting portion, and reference numerals 20L and 20R designate strengths, respectively. A reinforcing plate as a member, 21 is a rear vertical plate rear end side support plate, center 0 is a turning center of the upper turning body 3, and 22 is a turning race, which turns the upper turning body 3 and the lower traveling body 2 through bearings. They are freely connected. FIG. 4 is a diagram viewed from BB in FIG. FIG. 5 shows the body frame 1 shown in FIGS.
FIG. FIG. 6 is an enlarged detailed view of a portion C in FIG.
【００１４】次に、本発明の一実施形態の上部旋回体３
の構成及び作用を図１〜図６について述べる。本実施形
態では、平面視略円形の上部旋回体３の機体フレーム１
０において、下面板１１上に立設されブーム９基部を枢
支する一対の前後方向の強度部材である縦板を前部縦板
１２と後部縦板１３の分割形に形成し、前記前部縦板１
２と後部縦板１３とを横板１４を介して固着（溶接によ
る）し、前記前部縦板１２及び後部縦板１３と、前記横
板１４とが交又するコーナ部のうち、前記上部旋回体１
に搭載するエンジン５（図１に示す）に近接したコーナ
部Ｃ１，Ｃ２（図３に示す）に対して、平面視形状が略
三角形の補強板２０Ｌ，２０Ｒをそれぞれ水平方向に設
けた（溶接にて固設した）。Next, the upper rotating body 3 according to one embodiment of the present invention.
1 to 6 will be described. In the present embodiment, the body frame 1 of the upper swing body 3 having a substantially circular shape in plan view.
At 0, a pair of longitudinal plates, which are a pair of longitudinal strength members that are erected on the lower surface plate 11 and pivotally support the base of the boom 9, are formed in a divided shape of a front vertical plate 12 and a rear vertical plate 13; Vertical plate 1
2 and the rear vertical plate 13 are fixed to each other via a horizontal plate 14 (by welding), and among the corner portions where the front vertical plate 12 and the rear vertical plate 13 intersect with the horizontal plate 14, the upper portion is formed. Revolving superstructure 1
The reinforcement plates 20L and 20R each having a substantially triangular shape in plan view are provided in the horizontal direction with respect to the corner portions C1 and C2 (shown in FIG. 3) close to the engine 5 (shown in FIG. Was fixed at).
【００１５】これにより、一対の前後方向の前記後部縦
板１３−１３間の間隔（図３に示すピッチＰＲをいう）
を前記機体フレーム１０後部の機関室内にエンジンを配
置するのに、エンジンの大きさ，形状に合わせて最適の
ピッチに設定できる。また前記上部旋回体３に搭載する
エンジン５に近接した前記コーナ部Ｃ１，Ｃ２に対し
て、前記下面板１１と平行に平面視略三角形の補強板２
０Ｌ，２０Ｒをそれぞれ水平方向に設けたので、前記縦
板１２と横板１４の倒れを防止でき、また前記下面板１
１の歪曲変形等も防止することができるとともに、前記
横板１４，下面板１１等の板厚を必要最低限の板厚に設
定することより、重量・コストの増加を抑えることがで
きる。Thus, the interval between the pair of rear vertical plates 13-13 in the front-rear direction (referred to as a pitch PR shown in FIG. 3).
In order to arrange the engine in the engine room at the rear of the body frame 10, the pitch can be set to an optimum pitch according to the size and shape of the engine. Further, a reinforcing plate 2 having a substantially triangular shape in a plan view is provided in parallel with the lower surface plate 11 with respect to the corner portions C1 and C2 close to the engine 5 mounted on the upper rotating body 3.
0L and 20R are provided in the horizontal direction, so that the vertical plate 12 and the horizontal plate 14 can be prevented from falling down, and the lower plate 1
1 can be prevented, and by setting the thickness of the horizontal plate 14, the lower surface plate 11 and the like to the minimum required thickness, increase in weight and cost can be suppressed.
【００１６】なお、補強板２０Ｌ，２０Ｒは板材で構成
されたので、補強板２０Ｌ，２０Ｒ自体が高さ方向にス
ペースを占有しないため、補強板２０Ｌ，２０Ｒ自体の
取付けにも自由度が高いが、できる限り高い位置に配置
した方が強度の点では有利である。Since the reinforcing plates 20L and 20R are made of a plate material, the reinforcing plates 20L and 20R themselves do not occupy a space in the height direction, so that the reinforcing plates 20L and 20R can be mounted with a high degree of freedom. However, it is more advantageous to arrange at a position as high as possible in terms of strength.
【００１７】更に前記補強板２０Ｌ，２０Ｒは、前記横
板１４に近接する側のエンジンマウント取付部１６ａ，
１６ｂのそれぞれ下端面部（図６において符号イ，ロで
示す部分）を支持するようにした。これにより、前記エ
ンジンマウント取付部１６ａ，１６ｂを、各後部縦板１
３，１３，横板１４，及び補強板２０Ｌ，２０Ｒに対し
て確固として固着（溶接）することができるとともに、
相対的に、前記後部縦板１３，横板１４，及び補強板２
０Ｌ，２０Ｒの強度・剛性も確保することができる。Further, the reinforcing plates 20L and 20R are connected to the engine mount mounting portions 16a and 16a on the side close to the horizontal plate 14.
The lower end surfaces of 16b (portions indicated by reference numerals a and b in FIG. 6) are supported. As a result, the engine mount mounting portions 16a and 16b are attached to the rear vertical plates 1 respectively.
3, 13 and the horizontal plate 14, and the reinforcing plates 20L and 20R can be firmly fixed (welded).
In comparison, the rear vertical plate 13, the horizontal plate 14, and the reinforcing plate 2
The strength and rigidity of 0L and 20R can be secured.
【００１８】更に前記後部縦板１３は、その板厚寸法ｔ
Ｒ（図３に示す）が、前記前部縦板１２の板厚寸法ｔＦ
と異なる寸法に設定することにより、前記上部旋回体３
の機体フレーム１０後部に作用する前記エンジン５，カ
ウンタウエイト７等の重量負荷に対応して、前記後部縦
板１３の板厚寸法ｔＲを必要最低限の寸法に設定して、
大幅な重量増やコストアップなど不具合，不経済な問題
を避けることもできる。Further, the rear vertical plate 13 has a plate thickness t.
R (shown in FIG. 3) is the thickness tF of the front vertical plate 12.
By setting the size different from that of the upper
The thickness tR of the rear vertical plate 13 is set to the minimum necessary size in accordance with the weight load of the engine 5, the counterweight 7, etc. acting on the rear part of the body frame 10 of
Problems such as large weight increase and cost increase, and uneconomic problems can be avoided.
【００１９】次に図７は、本実施形態の上部旋回体３に
おける他実施例補強板２０の固設状態を示す要部斜視図
である。図において、図６に示す機体フレーム１０と同
一構成要素を使用しているものに対しては同符号を付
す。図７に示す補強板２０は、前記コーナ部のうち２箇
所のコーナ部Ｃ１−Ｃ２にわたる一枚板で形成するよう
にした。すなわち前記エンジン５等の機器類と接触干渉
をおこすおそれが無い場合には、前記エンジン５に近接
した２箇所のコーナ部Ｃ１−Ｃ２にわたって一枚板の補
強板２０を設けるようにした。これにより、機体フレー
ム１０’における補強板２０をより強固なものにするこ
とができるとともに、補強板の部材点数が減ってコスト
的に有利である。FIG. 7 is a perspective view of a main part showing a fixed state of a reinforcing plate 20 of another example in the upper swing body 3 of the present embodiment. In the figure, components using the same components as those of the body frame 10 shown in FIG. The reinforcing plate 20 shown in FIG. 7 was formed as a single plate extending over two corners C1-C2 of the corners. That is, when there is no possibility of causing interference with devices such as the engine 5, a single reinforcing plate 20 is provided over two corner portions C1-C2 close to the engine 5. Thereby, the reinforcing plate 20 in the body frame 10 'can be made stronger, and the number of members of the reinforcing plate is reduced, which is advantageous in cost.
【００２０】[0020]
【発明の効果】請求項１記載の発明によれば、左右一対
の後部強度部材の相対間隔に自由度があり、上部旋回体
上の機器配置スペースを良好に得ることができ、特に大
型の機器を配置する際に有利である。また、補強部材を
中間強度部材と後部強度部材とに亘って接続して設けた
ので、必要最小限の部品の追加により、強度部材や底板
の板厚を厚くすることなく十分な強度を得ることができ
るため、重量・コストの増加を抑えることができる。According to the first aspect of the present invention, there is a degree of freedom in the relative spacing between the pair of left and right rear strength members, and a good space for equipment arrangement on the upper revolving unit can be obtained. It is advantageous when arranging. In addition, since the reinforcing member is provided so as to be connected across the intermediate strength member and the rear strength member, sufficient strength can be obtained without increasing the thickness of the strength member and the bottom plate by adding the necessary minimum parts. Therefore, an increase in weight and cost can be suppressed.
【００２１】更に請求項２記載の発明によれば、必要強
度に応じて、所要の板厚の板部材で形成された補強部材
の大きさ（平面視での面積）を調整することができ、こ
のため、補強部材は上部旋回体上で上下方向のスペース
を占有せず、各種機器類を配置する際に邪魔にならな
い。Further, according to the second aspect of the present invention, it is possible to adjust the size (area in plan view) of the reinforcing member formed of a plate member having a required thickness according to the required strength, For this reason, the reinforcing member does not occupy the space in the vertical direction on the upper rotating body, and does not hinder the arrangement of various devices.
【００２２】更に請求項３記載の発明によれば、前記補
強部材は、左右一対の後部強度部材と前記中間強度部材
とに接続されるとともに、平面視で前方に向けて左右方
向中央部を中心として凹んだ板部材により構成した。こ
れによれば、前述のものに比べて部品点数を更に削減で
きる。According to the third aspect of the present invention, the reinforcing member is connected to the pair of left and right rear strength members and the intermediate strength member, and has a center in the left-right direction centered forward in plan view. And a concave plate member. According to this, the number of parts can be further reduced as compared with the above-described one.
【００２３】また請求項４記載の発明によれば、前記左
右一対の前部強度部材は前記作業アタッチメントを支持
し、また前記中間強度部材より後方が、エンジンが配置
される機関室に設定されるとともに、前記左右一対の前
部強度部材と、前記左右一対の後部強度部材の少なくと
も一方は前後方向に同一線上に配置されないようにし
た。これにより、機関室内におけるエンジンの配置位置
に自由度が増し、機関室が大型化するのを防ぐことがで
きるとともに、十分な強度を維持することができる。According to the fourth aspect of the present invention, the pair of left and right front strength members supports the work attachment, and the rear of the intermediate strength member is set in an engine room in which an engine is arranged. In addition, at least one of the pair of left and right front strength members and the pair of right and left rear strength members is not arranged on the same line in the front-rear direction. Thereby, the degree of freedom in the arrangement position of the engine in the engine room is increased, and it is possible to prevent the engine room from being enlarged, and to maintain sufficient strength.
【図１】本発明の一実施形態の上部旋回体を装備した小
旋回式油圧ショベルの全体側面図である。FIG. 1 is an overall side view of a small swing hydraulic excavator equipped with an upper swing body according to an embodiment of the present invention.
【図２】図１における上部旋回体の切開要部側面図であ
る。FIG. 2 is a side view of a main part of the upper revolving structure in FIG. 1;
【図３】図２における機体フレームをＡ−Ａより見た要
部平面図である。FIG. 3 is a main part plan view of the body frame in FIG. 2 as viewed from AA.
【図４】図３のＢ−Ｂより見た図である。FIG. 4 is a diagram viewed from BB in FIG. 3;
【図５】図２〜図４に示す機体フレームの要部斜視図で
ある。FIG. 5 is a perspective view of a main part of the body frame shown in FIGS. 2 to 4;
【図６】図５のＣ部拡大詳細図である。FIG. 6 is an enlarged detailed view of a part C in FIG. 5;
【図７】本実施形態の上部旋回体における他実施例補強
板の固設状態を示す要部斜視図である。FIG. 7 is a perspective view of a main part showing a fixed state of a reinforcing plate of another example in the upper swing body of the present embodiment.
【図８】従来技術の一実施例小旋回式油圧ショベルの上
部旋回体の旋回フレームを示す斜視図である。FIG. 8 is a perspective view showing a revolving frame of an upper revolving body of a small-swing hydraulic excavator according to one embodiment of the prior art.
１ （小旋回式）油圧ショベル ２ 下部走行体 ３ 上部旋回体 ５ エンジン ７ カウンタウエイト ８ 作業アタッチメント ９ ブーム １０，１０’ 機体フレーム １１ 下面板 １２ 前部縦板 １２ａ ブーム基端枢支部 １３ 後部縦板 １４ 横板 １６ａ，１６ｂ，１６ｃ，１６ｄ エンジンマウント取
付部 ２０，２０Ｌ，２０Ｒ 補強板 Ｃ１，Ｃ２ コーナ部 ０ 旋回中心DESCRIPTION OF SYMBOLS 1 (Small swing type) hydraulic excavator 2 Undercarriage 3 Upper revolving body 5 Engine 7 Counterweight 8 Work attachment 9 Boom 10, 10 'Airframe 11 Lower surface plate 12 Front vertical plate 12a Boom base pivot support 13 Rear vertical plate 14 Horizontal plate 16a, 16b, 16c, 16d Engine mount attachment part 20, 20L, 20R Reinforcement plate C1, C2 Corner part 0 Center of rotation
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小林 真人 広島県広島市安佐南区祇園３丁目12番４号 油谷重工株式会社内 (72)発明者 松井 幹 広島県広島市安佐南区祇園３丁目12番４号 油谷重工株式会社内 (72)発明者 山口 拓則 神戸市西区高塚台１丁目５番５号 株式会 社神戸製鋼所神戸総合技術研究所内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masato Kobayashi 3-12-4 Gion, Asanami-ku, Hiroshima City, Hiroshima Prefecture Inside Aburaya Heavy Industries, Ltd. No. 12 in Aburaya Heavy Industries, Ltd.
Claims (4)
自在に搭載された上部旋回体と、前記上部旋回体に起伏
自在に設けられた作業アタッチメントを有する建設機械
において、前記上部旋回体は、上部旋回体前後方向に立
設された左右一対の前部強度部材と、前記一対の縦板と
直交し、かつ前記縦板の後端に接続されて立設された中
間強度部材と、前記横板に前端が接続され、かつ前後方
向に立設された左右一対の後部強度部材と、前記中間強
度部材と、前記後部強度部材とに接続された補強部材と
を有することを特徴とする建設機械の上部旋回体。1. A construction machine comprising: a lower traveling structure; an upper revolving structure rotatably mounted on the lower traveling structure; and a work attachment rotatably provided on the upper revolving structure. A pair of left and right front strength members erected in the front and rear direction of the upper revolving structure, an intermediate strength member orthogonal to the pair of vertical plates, and erected connected to the rear end of the vertical plates, A front end is connected to the horizontal plate, and a pair of left and right rear strength members erected in the front-rear direction, the intermediate strength member, and a reinforcing member connected to the rear strength member are provided. Upper revolving structure of construction equipment.
材のそれぞれと前記中間強度部材とに左右それぞれ別個
に接続されるとともに、平面視略三角形状を有する板部
材により構成されることを特徴とする請求項１記載の建
設機械の上部旋回体。2. The reinforcing member is connected to each of a pair of left and right rear strength members and the intermediate strength member separately from the left and right sides, and is formed of a plate member having a substantially triangular shape in plan view. The revolving superstructure of a construction machine according to claim 1, wherein
材と前記中間強度部材とに接続されるとともに、平面視
で前方に向けて左右方向中央部を中心として凹んだ板部
材により構成されることを特徴とする請求項１記載の建
設機械の上部旋回体。3. The reinforcing member is connected to a pair of left and right rear strength members and the intermediate strength member, and is formed of a plate member that is recessed toward the front in plan view with a center in the left-right direction. The revolving superstructure of a construction machine according to claim 1, wherein:
アタッチメントを支持し、また前記中間強度部材より後
方が、エンジンが配置される機関室に設定されるととも
に、前記左右一対の前部強度部材と、前記左右一対の後
部強度部材の少なくとも一方は前後方向に同一線上に配
置されないことを特徴とする請求項１乃至３記載の建設
機械の上部旋回体。4. The pair of left and right front strength members supports the work attachment, the rear of the intermediate strength member is set in an engine room in which an engine is disposed, and the pair of left and right front strength members is provided. The upper revolving structure of a construction machine according to claim 1, wherein at least one of the member and the pair of left and right rear strength members is not arranged on the same line in the front-rear direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12829898A JPH11303139A (en) | 1998-04-21 | 1998-04-21 | Upper structure of construction machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12829898A JPH11303139A (en) | 1998-04-21 | 1998-04-21 | Upper structure of construction machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11303139A true JPH11303139A (en) | 1999-11-02 |
Family
ID=14981346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12829898A Pending JPH11303139A (en) | 1998-04-21 | 1998-04-21 | Upper structure of construction machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11303139A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009057795A (en) * | 2007-09-03 | 2009-03-19 | Kobelco Contstruction Machinery Ltd | Construction machine |
| JP2011074606A (en) * | 2009-09-29 | 2011-04-14 | Kubota Corp | Revolving frame for revolving working machine |
| WO2012122439A2 (en) * | 2011-03-10 | 2012-09-13 | Caterpillar Inc. | Tilt cylinder support structure |
| JP2013249649A (en) * | 2012-05-31 | 2013-12-12 | Yanmar Co Ltd | Work vehicle |
| WO2019146668A1 (en) * | 2018-01-24 | 2019-08-01 | 株式会社小松製作所 | Turning frame and construction machine |
-
1998
- 1998-04-21 JP JP12829898A patent/JPH11303139A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009057795A (en) * | 2007-09-03 | 2009-03-19 | Kobelco Contstruction Machinery Ltd | Construction machine |
| JP2011074606A (en) * | 2009-09-29 | 2011-04-14 | Kubota Corp | Revolving frame for revolving working machine |
| WO2012122439A2 (en) * | 2011-03-10 | 2012-09-13 | Caterpillar Inc. | Tilt cylinder support structure |
| WO2012122439A3 (en) * | 2011-03-10 | 2013-03-14 | Caterpillar Inc. | Tilt cylinder support structure |
| US8770908B2 (en) | 2011-03-10 | 2014-07-08 | Caterpillar Inc. | Tilt cylinder support structure |
| JP2013249649A (en) * | 2012-05-31 | 2013-12-12 | Yanmar Co Ltd | Work vehicle |
| WO2019146668A1 (en) * | 2018-01-24 | 2019-08-01 | 株式会社小松製作所 | Turning frame and construction machine |
| JP2019127751A (en) * | 2018-01-24 | 2019-08-01 | 株式会社小松製作所 | Revolving frame and construction machine |
| CN110312835A (en) * | 2018-01-24 | 2019-10-08 | 株式会社小松制作所 | Rotary frame and building machinery |
| CN110312835B (en) * | 2018-01-24 | 2022-07-29 | 株式会社小松制作所 | Rotating frame and construction machine |
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