JPS6442358U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の実施例にかかる振動抑制装置
の油圧および電気回路構成図、第２図は同装置が
組込まれたホイールローダの側面図、第３図は同
一部拡大図である。 １……ホイールローダ本体、４……作業装置、
５……作業装置のブーム、６……同バケツト、８
……作業装置を昇降させるブームリフトシリンダ
、８ａ……同シリンダにおける負荷によつて圧力
が発生する油室、１６……同油室に接続された圧
油給排管路、１８……分岐管路、２２……振動抑
制回路、１９……同回路の電磁切換弁、２１……
同アキユムレータ。 FIG. 1 is a hydraulic and electrical circuit configuration diagram of a vibration suppressing device according to an embodiment of the present invention, FIG. 2 is a side view of a wheel loader incorporating the same device, and FIG. 3 is an enlarged view of a portion of the same. 1...Wheel loader main body, 4...Working device,
5...Boom of working equipment, 6...Bucket, 8
...Boom lift cylinder that raises and lowers the working equipment, 8a...Oil chamber in which pressure is generated by the load in the cylinder, 16...Pressure oil supply and drainage pipe connected to the oil chamber, 18...Branch pipe 22... Vibration suppression circuit, 19... Solenoid switching valve of the same circuit, 21...
Same accumulator.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 走行体と、この走行体に昇降可能に取付けられ
た作業装置と、この作業装置を昇降させる油圧シ
リンダとを具備したホイール式作業機械において
、上記油圧シリンダにおける上記作業装置を下降
させる方向の負荷によつて圧力が発生する側の油
室に、アキユムレータと、電気信号に基づいてオ
ンオフ切換わり作動する切換弁とを備えた振動抑
制回路が接続され、かつ、上記切換弁をオンオフ
制御する制御回路に、作業装置の対地高さを検出
しこの検出値が設定値以下のときに上記切換弁に
対するオフ信号を出力するスイツチ手段が設けら
れてなることを特徴とするホイール式作業機械の
振動抑制装置。 In a wheel-type working machine comprising a traveling body, a working device attached to the traveling body so that it can be raised and lowered, and a hydraulic cylinder that raises and lowers the working device, a load on the hydraulic cylinder in the direction of lowering the working device is applied. Therefore, a vibration suppression circuit including an accumulator and a switching valve that is switched on and off based on an electric signal is connected to the oil chamber on the side where pressure is generated, and a control circuit that controls the switching valve on and off is connected to the oil chamber on the side where pressure is generated. A vibration suppressing device for a wheel-type working machine, comprising a switch means for detecting the height of the working device from the ground and outputting an off signal to the switching valve when the detected value is less than a set value.