JPH0310207Y2 - - Google Patents
Info
- Publication number
- JPH0310207Y2 JPH0310207Y2 JP16171983U JP16171983U JPH0310207Y2 JP H0310207 Y2 JPH0310207 Y2 JP H0310207Y2 JP 16171983 U JP16171983 U JP 16171983U JP 16171983 U JP16171983 U JP 16171983U JP H0310207 Y2 JPH0310207 Y2 JP H0310207Y2
- Authority
- JP
- Japan
- Prior art keywords
- boom
- base end
- side plates
- support
- plates
- 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.)
- Expired
Links
- 230000003014 reinforcing effect Effects 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 description 10
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Component Parts Of Construction Machinery (AREA)
Description
【考案の詳細な説明】
この考案は、バツクホーのブーム基端構造に関
するものである。[Detailed description of the invention] This invention relates to a boom base end structure of a bomb hoe.
従来、バツクホーのブーム基端は、機体に設け
たブーム支持体に上下回動自在に枢支され、同ブ
ーム中途部と、ブーム支持体との間に介装された
油圧シリンダの伸縮作動により上下回動して作業
を行うように構成されており、同ブームを枢支す
るために設けたブーム支持体の横枢軸と、ブーム
基端に設けた軸受には、縮、引張り、捩り等の荷
重がかかつており、同荷重を負担するために、軸
受を支持する軸受支持体のブーム基端への固着構
造が多数考案されているが、いずれも部材が軸受
支持体近傍に集中して、構造が複雑となり、工作
加工、溶接組立が困難であり、材料のロスも多く
なるという欠点があつた。 Conventionally, the base end of the boom of a bomb hoe was pivoted to a boom support provided on the aircraft so that it could move up and down, and it could be moved up and down by the telescoping action of a hydraulic cylinder interposed between the mid-section of the boom and the boom support. It is configured to rotate to perform work, and the horizontal axis of the boom support provided to pivot the boom and the bearing provided at the base end of the boom are loaded with loads such as compression, tension, and torsion. In order to bear the same load, many structures have been devised to fix the bearing support to the base end of the boom, but in all of these structures, the parts are concentrated near the bearing support and the structure is The drawbacks were that the process was complicated, machining and welding assembly was difficult, and there was a lot of material loss.
この考案では、ブームを、上下左右４枚の側板
により断面形が略長方形状に構成し、ブーム基端
の左右側板には、軸受支持体が当接すべき切欠部
を設けると共に、基端部に軸受支持体を嵌入する
ための嵌入口を設けた左右補強板を左右側板外側
面に貼着状態に溶着し、しかも嵌入口のブーム基
端側内周面と、軸受支持体外周面との間、所定の
間隙を保持するように構成することにより、上下
左右側板、左右補強板、及び軸受支持体の形状を
単純化して、同部材の工作加工及び溶接組立を容
易かつ強固にし、材料のロスを減少させるバツク
ホーのブーム基端構造を提供せんとするものであ
る。 In this idea, the boom has a substantially rectangular cross-section with four side plates (top, bottom, left and right), and the left and right side plates at the base end of the boom are provided with a notch to which the bearing support comes into contact, and the base end The left and right reinforcing plates, each having a fitting opening for fitting the bearing support, are adhered and welded to the outer surfaces of the left and right side plates, and the inner circumferential surface of the fitting opening on the boom proximal end is connected to the outer circumferential surface of the bearing support. By maintaining a predetermined gap between the parts, the shapes of the upper, lower, left, and right side plates, left and right reinforcing plates, and bearing supports are simplified, making machining and welding assembly of these parts easier and stronger, and making it easier to use materials. It is an object of the present invention to provide a boom base end structure of a backhoe that reduces loss.
この考案の実施例を図面にもとずいて詳細に説
明すれば、Ａはバツクホーを示しており、クロー
ラ式走行装置１を装備した走行フレーム２中央部
に立設した旋回基台３上面に、機体フレーム４を
左右旋回自在に架装し、同フレーム４上面後部に
原動機部５、中央部には運転部６を配設し、同フ
レーム４前端中央部には、ブラケツト７及びびブ
ーム支持体８を介して、ブーム９、アーム１０、
バケツト１１の順に上下回動自在に枢支連設され
ており、それぞれ配設したブーム油圧シリンダ
９′、アーム油圧シリンダ１０′バケツト油圧シリ
ンダ１１′の伸縮作動により、ブーム９、アーム
１０、バケツト１１を上下回動せしめてバツクホ
ーＡを構成してくる。 To explain the embodiment of this invention in detail based on the drawings, A indicates a backhoe, and on the upper surface of a rotating base 3 erected at the center of a traveling frame 2 equipped with a crawler type traveling device 1, The fuselage frame 4 is mounted so as to be able to turn left and right, and a prime mover section 5 is disposed at the rear of the upper surface of the frame 4, a driving section 6 is disposed at the center, and a bracket 7 and a boom support are disposed at the center of the front end of the frame 4. 8, boom 9, arm 10,
The bucket 11 is pivotally connected in order to be able to move up and down, and the boom 9, the arm 10, and the bucket 11 are extended and retracted by the boom hydraulic cylinder 9', the arm hydraulic cylinder 10, and the bucket hydraulic cylinder 11', which are arranged respectively. By moving it up and down, a backhoe A is formed.
ブラケツト７は、機体フレーム４前端中央部か
ら前方向に突設されており、同ブラケツト７前端
には、縦枢軸１２が挿通しており、同軸１２を介
してブーム支持体８が左右回動自在に枢支連結さ
れており、同支持体８左右側面は上方向に延設さ
れて二又状のブーム基端枢支部１３を形成してお
り、同枢支部１３は、ブーム基端９−１が挾持さ
れ、同枢支部１３及び同基端９−１を挿通した横
枢軸１４により上下回動自在に枢支連結されてい
る。 The bracket 7 projects forward from the center of the front end of the fuselage frame 4. A vertical pivot 12 is inserted through the front end of the bracket 7, and the boom support 8 can be rotated left and right via the same shaft 12. The right and left sides of the support 8 extend upward to form a bifurcated boom base end pivot support 13, and the boom base end 9-1 is pivotally connected to the boom base end 9-1. is clamped and pivotally connected to be vertically movable by a horizontal pivot 14 that passes through the pivot support 13 and the base end 9-1.
ブーム９外形は、左右幅員が一定で、上下厚さ
が両端に向つて次第に減少した断面形略長方形状
の四角柱形状で、ブーム基端９−１と、同先端９
−２との中途部において上方に凸状に屈曲してお
り、上下左右側板９−３，９−４，９−５，９−
６により構成されており、上下側板９−３，９−
４左右端縁は、左右側板９−５，９−６外側面か
ら外側方向に溶接代ｗが延設されており、同溶接
代ｗと、左右側板９−５，９−６外側面とで形成
される内偶部を偶内溶接で固着することによつて
ブーム９主体を構成している。 The outer shape of the boom 9 is a square column with a substantially rectangular cross-section, with a constant left and right width and a vertical thickness that gradually decreases toward both ends.
-2, it is bent upward in a convex shape, and the upper, lower, left and right side plates 9-3, 9-4, 9-5, 9-
6, upper and lower side plates 9-3, 9-
4. On the left and right edges, a welding allowance w extends outward from the outer surfaces of the left and right side plates 9-5 and 9-6, and the welding allowance w and the outer surfaces of the left and right side plates 9-5 and 9-6 are connected to each other. The main body of the boom 9 is constructed by fixing the formed inner joints by welding the inner joints.
ブーム球をブームブーム支持体８に枢支連結す
るために、ブーム基端９−１には、円筒形状の軸
受支持体１５が配設されており、同軸受支持体１
５は、左右側板９−５，９−６の基端に設けた半
円弧形状の切欠部１６に当接した状態で外側方か
ら隅肉溶接されている。 In order to pivotally connect the boom ball to the boom boom support 8, a cylindrical bearing support 15 is disposed at the boom base end 9-1.
5 is fillet welded from the outside in a state where it is in contact with a semicircular arc-shaped notch 16 provided at the base end of the left and right side plates 9-5, 9-6.
そして、上記半円弧形状の切欠部１６は軸受支
持体１５の外形と一致した半円弧形状となつてい
る。また、上下側板９−３，９−４基端縁は、軸
受支持体１５外周面上下部にそれぞれ溶着されて
いる。 The semicircular arc-shaped notch 16 has a semicircular arc shape that matches the outer shape of the bearing support 15. The base edges of the upper and lower side plates 9-3 and 9-4 are welded to the upper and lower portions of the outer peripheral surface of the bearing support 15, respectively.
更に、ブーム基端９−１近傍の左右側板９−
５，９−６外側面には、基端部に軸受支持体１５
が嵌入すべき嵌入口１７−１を設けた左右補強板
１７，１７′が貼着状態に溶着されており、この
際生ずる同補強板１７，１７′上下端縁と溶接代
ｗとの干渉を回避するために基端部近傍の溶接代
ｗを左右側板９−５，９−６外周側面と同一面に
なるよう切欠することにより、同補強板１７，１
７′の上下端縁を滑らかな曲線に形成し、切欠効
果により応力集中を回避している。嵌入口１７−
１と、軸受支持体１５との嵌合状態は、嵌入口１
７−１のブーム基端側面内周面と軸受支持体１５
外周面とは密着状態、嵌入口１７−１のブーム先
端側内周面と軸受支持体１５外周面とは三日月形
状の段差状の間隙ｓが設けられており、同段差状
の間隙ｓにより外側方から、軸受支持体１５と左
右側板９−５，９−６、左右側板９−５，９−６
と左右補強板１７，１７′の嵌入口１７−１内周
縁、嵌入口１７−１内周縁と軸受支持体１５外周
面の順ａ，ｂ，ｃに溶接固着されている。 Furthermore, the left and right side plates 9-1 near the boom base end 9-1
5, 9-6 The outer surface has a bearing support 15 at the base end.
The left and right reinforcing plates 17, 17' provided with a fitting opening 17-1 into which the reinforcing plates 17, 17' are to be fitted are welded together in a bonded state. In order to avoid this, the welding allowance w near the base end is cut out so that it is flush with the outer circumferential side surfaces of the left and right side plates 9-5, 9-6, thereby reinforcing plates 17, 1.
The upper and lower edges of 7' are formed into smooth curves to avoid stress concentration due to the notch effect. Fitting port 17-
1 and the bearing support 15 are fitted into the fitting opening 1.
Boom base end side inner peripheral surface and bearing support 15 of 7-1
A crescent-shaped step-shaped gap s is provided between the inner circumferential surface of the boom tip side of the insertion port 17-1 and the outer circumferential surface of the bearing support 15, and the outer circumferential surface is in close contact with the outer circumferential surface. From the side, the bearing support 15, the left and right side plates 9-5, 9-6, and the left and right side plates 9-5, 9-6.
The left and right reinforcing plates 17, 17' are welded and fixed to the inner circumferential edge of the fitting port 17-1, the inner circumferential edge of the fitting port 17-1, and the outer circumferential surface of the bearing support 15 in the order a, b, and c.
更に左右補強板１７，１７′は、二又状に分岐
してブーム９先端方向に延設されており、同補強
板１７，１７′上下端縁は、上下側板９−３，９
−４上下側面とは一定の間隙s′を保持しつつ左右
側板９−５，９−６に断続溶接されており、同補
強板１７，１７′先端は溶接脚長をブーム９先端
方向に長く延長している。特に間隙s′を設けるこ
とにより、左右補強板１７，１７′張設位置の溶
接順序は、上下側板９−３，９−４と左右側板９
−５，９−６、左右側板９−５，９−６と左右補
強板１７，１７′、上下側板９−３，９−４と左
右補強板１７，１７′の順ｄ，ｅ，ｆに溶接固着
してブーム９を一体に構成するものである。 Further, the left and right reinforcing plates 17, 17' are bifurcated and extend toward the tip of the boom 9, and the upper and lower edges of the reinforcing plates 17, 17' are connected to the upper and lower side plates 9-3, 9-3.
-4 The upper and lower sides are intermittently welded to the left and right side plates 9-5 and 9-6 while maintaining a constant gap s', and the ends of the reinforcing plates 17 and 17' extend the welding leg length toward the tip of the boom 9. are doing. In particular, by providing a gap s', the welding order of the left and right reinforcing plates 17, 17' can be changed to the upper and lower side plates 9-3, 9-4 and the left and right side plates 9
-5, 9-6, left and right side plates 9-5, 9-6 and left and right reinforcing plates 17, 17', upper and lower side plates 9-3, 9-4 and left and right reinforcing plates 17, 17' in order d, e, f. The boom 9 is integrally constructed by welding and fixing.
この考案によれば、ブームを構成する左右側板
基端に、軸受支持体が当接する切欠部を設け、基
端部に軸受支持体が嵌入すべき嵌入口を設けた左
右補強板を左右側板外側面に貼着状態に溶着し、
嵌入口のブーム先端側内周面と、軸受支持体外周
面との間に間隙を設けることにより、上下左右側
板の左右補強板及び軸受支持体の形状が単純化
し、加工工作が容易でしかも溶接作業がすべて外
側から行うことができ、強固な溶接構造とするこ
とができるという効果がある。 According to this invention, the base ends of the left and right side plates constituting the boom are provided with notches into which the bearing supports come into contact, and the left and right reinforcing plates, which have insertion holes at the base ends into which the bearing supports are inserted, are installed outside the left and right side plates. Welded to the side,
By creating a gap between the inner peripheral surface on the boom tip side of the insertion opening and the outer peripheral surface of the bearing support, the shapes of the left and right reinforcing plates of the upper, lower, left, and right side plates and the bearing support are simplified, making machining easier and easier to weld. This has the advantage that all work can be done from the outside, resulting in a strong welded structure.
第１図は、本考案の要旨になるブーム基端構造
を有するバツクホーの全体側面図、第２図は、同
要部拡大側面図、第３図は、同要部拡大平面図、
第４図は、第２図−断面図、第５図は、第２
図−断面図、第６図は、第２図−切断端
面図。
Ａ……バツクホー、ｓ，s′……間隙、９，９−
１……ブーム、同基端、９−３，９−４，９−
５，９−６……上、下、左、右側板、１７，１
７′……左右補強板、ｗ……溶接代。
Fig. 1 is an overall side view of a backhoe having a boom base end structure which is the gist of the present invention, Fig. 2 is an enlarged side view of the main part, and Fig. 3 is an enlarged plan view of the main part.
Figure 4 is a sectional view of Figure 2, and Figure 5 is a cross-sectional view of Figure 2.
FIG. 6 is a cross-sectional view of FIG. 2; FIG. A... Backhoe, s, s'... Gap, 9,9-
1...Boom, base end, 9-3, 9-4, 9-
5,9-6...Top, bottom, left, right side board, 17,1
7'...Right and left reinforcing plates, w...Welding allowance.
Claims (1)
板９−３，９−４，９−５，９−６により断面形
状が略長方形状になるように構成し、左右側板９
−５，９−６基端に設けた半円弧状の切欠部１６
に円筒形状の軸受部支持体１５を当接せしめて両
者固着すると共に、左右側板９−５，９−６基端
部外側面に左右補強板１７，１７′を貼着し、同
補強板１７，１７′の基端に軸受部支持体１５の
外周面よりも間隔を設けて嵌入口１７−１を設け
て、同軸受部支持体１５の外周面と補強板１７，
１７′の嵌入口１７−１との間に間隙Ｓを形成し
て溶接部としたバツクホーのブーム基端構造。 The boom 9 of the backhoe A is configured to have a substantially rectangular cross-sectional shape with upper, lower, left, and right side plates 9-3, 9-4, 9-5, and 9-6.
-5,9-6 Semicircular arc-shaped notch 16 provided at the base end
The cylindrical bearing part support 15 is brought into contact with the cylindrical bearing support 15 to fix them together, and left and right reinforcing plates 17 and 17' are attached to the outer surfaces of the base end portions of the left and right side plates 9-5 and 9-6. , 17' are provided with a fitting opening 17-1 spaced apart from the outer peripheral surface of the bearing part support 15, so that the outer peripheral surface of the bearing part support 15 and the reinforcing plate 17,
A boom base end structure of a backhoe with a gap S formed between the fitting opening 17-1 and the welded part 17'.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16171983U JPS6070662U (en) | 1983-10-19 | 1983-10-19 | Backhoe boom base structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16171983U JPS6070662U (en) | 1983-10-19 | 1983-10-19 | Backhoe boom base structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6070662U JPS6070662U (en) | 1985-05-18 |
| JPH0310207Y2 true JPH0310207Y2 (en) | 1991-03-13 |
Family
ID=30355327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16171983U Granted JPS6070662U (en) | 1983-10-19 | 1983-10-19 | Backhoe boom base structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6070662U (en) |
-
1983
- 1983-10-19 JP JP16171983U patent/JPS6070662U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6070662U (en) | 1985-05-18 |
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