JPS6419665U - - Google Patents
Info
- Publication number
- JPS6419665U JPS6419665U JP11252087U JP11252087U JPS6419665U JP S6419665 U JPS6419665 U JP S6419665U JP 11252087 U JP11252087 U JP 11252087U JP 11252087 U JP11252087 U JP 11252087U JP S6419665 U JPS6419665 U JP S6419665U
- Authority
- JP
- Japan
- Prior art keywords
- boom
- backhoe
- cylinder
- swing
- swing bracket
- 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
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
図面は本考案に係るバツクホウのブーム下降速
度抑制装置の実施例を示し、第１図ないし第３図
は夫々要部横断面を示す作用説明図、第４図は油
圧回路の概略図、第５図はバツクホウの全体側面
図、第６図は従来例の油圧回路の概略図である。
４…バツクホウ装置、８…油圧シリンダ、９…
スイングブラケツト、１０…ブーム用シリンダ、
１１…ブーム、１７…絞り装置、１９…可変絞り
弁、Ａ…車体、ＣＶ…コントロールバルブ、Ｒ２
…戻り油路。
The drawings show an embodiment of the boom descending speed suppressing device for a backhoe according to the present invention, FIGS. 1 to 3 are operation explanatory diagrams showing cross sections of main parts, FIG. 4 is a schematic diagram of the hydraulic circuit, and FIG. The figure is an overall side view of the backhoe, and FIG. 6 is a schematic diagram of a conventional hydraulic circuit. 4...Backhoe device, 8...Hydraulic cylinder, 9...
Swing bracket, 10...boom cylinder,
11...Boom, 17...throttle device, 19...variable throttle valve, A...vehicle body, CV...control valve, R2
...Return oil road.
Claims (1)
ラケツト９を介して車体Ａに取付け、前記バツク
ホウ装置４の油圧系にブーム１１下降時にブーム
１１用シリンダ１０からの戻り油に作用する絞り
装置１７を設けてあるバツクホウのブーム下降速
度抑制装置であつて、前記絞り装置１７を形成す
るに、前記ブーム１１用シリンダ１０とそれに対
するコントロールバルブＣＶとを接続する戻り油
路Ｒ２に可変絞り弁１９を設け、前記可変絞り弁
１９を、前記車体Ａに対する前記ブーム１１の向
きが前後方向から横方向に変わるほど流動抵抗が
大になるように、前記スイングブラケツト９又は
前記スイングブラケツト９の左右揺動操作用油圧
シリンダ８に連動させてあるバツクホウのブーム
下降速度抑制装置。 The backhoe device 4 is attached to the vehicle body A via a swing bracket 9 so as to be able to swing left and right, and the hydraulic system of the backhoe device 4 is provided with a throttle device 17 that acts on return oil from the cylinder 10 for the boom 11 when the boom 11 is lowered. In a boom descending speed suppressing device for a certain backhoe, in order to form the throttle device 17, a variable throttle valve 19 is provided in the return oil path R2 connecting the cylinder 10 for the boom 11 and the control valve CV therefor, The variable throttle valve 19 is controlled by the swing bracket 9 or the hydraulic pressure for horizontal swing operation of the swing bracket 9 so that the flow resistance increases as the direction of the boom 11 relative to the vehicle body A changes from the longitudinal direction to the lateral direction. Backhoe boom lowering speed control device linked to cylinder 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11252087U JPS6419665U (en) | 1987-07-21 | 1987-07-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11252087U JPS6419665U (en) | 1987-07-21 | 1987-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6419665U true JPS6419665U (en) | 1989-01-31 |
Family
ID=31351531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11252087U Pending JPS6419665U (en) | 1987-07-21 | 1987-07-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6419665U (en) |
-
1987
- 1987-07-21 JP JP11252087U patent/JPS6419665U/ja active Pending
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