JPS6176870U

JPS6176870U -

Info

Publication number: JPS6176870U
Application number: JP16113684U
Authority: JP
Priority date: 1984-10-26
Filing date: 1984-10-26
Publication date: 1986-05-23

Description

[Brief explanation of the drawing]

第１図は本考案の旋回作業車の旋回体揺動用油
圧回路の第１の実施例を示す回路図、第２図は本
考案の第２の実施例を示す回路図、第３図は第２
図に示す油圧回路が備えられる旋回作業車の揺動
部に作用する荷重の分担を示す模式図、第４図は
本考案の対象する旋回作業車の一例として挙げた
油圧シヨベルの全体の構成を示す側面図、第５図
は第４図に示す油圧シヨベルの揺動部をフロント
側から見た断面図、第６図は従来の旋回体揺動用
油圧回路を示す回路図である。１…走行体、２…フレーム、９…揺動板、１０
…旋回体、１３，１３ａ…揺動用油圧シリンダ、
１４…油圧ポンプ、１５…揺動用方向切換弁、１
５ａ…ブレーキバルブ、１６，１６ａ…管路、１
７，１７ａ…リリーフ弁、１９，１９ａ，２６，
２６ａ…ストツプバルブ、２０，２０ａ…揺動用
油圧シリンダ、２１，２１ａ…ピストン、２２，
２２ａ…ボトム側室、２３，２３ａ…ロツド側室
、２４，２５…管路。 Fig. 1 is a circuit diagram showing a first embodiment of a hydraulic circuit for swinging a revolving body of a swing work vehicle according to the present invention, Fig. 2 is a circuit diagram showing a second embodiment of the present invention, and Fig. 2
Figure 4 is a schematic diagram showing the distribution of loads acting on the swinging parts of a swinging work vehicle equipped with the hydraulic circuit shown in the figure. FIG. 5 is a sectional view of the swinging section of the hydraulic excavator shown in FIG. 4 seen from the front side, and FIG. 6 is a circuit diagram showing a conventional hydraulic circuit for swinging a rotating body. 1... Traveling body, 2... Frame, 9... Rocking plate, 10
...Swivel body, 13, 13a... Hydraulic cylinder for swinging,
14... Hydraulic pump, 15... Swinging directional control valve, 1
5a...Brake valve, 16, 16a...Pipeline, 1
7, 17a...Relief valve, 19, 19a, 26,
26a... Stop valve, 20, 20a... Swinging hydraulic cylinder, 21, 21a... Piston, 22,
22a... Bottom side chamber, 23, 23a... Rod side chamber, 24, 25... Pipe line.

Claims

[Scope of utility model registration request]

Seven swinging hydraulic cylinders are arranged between the frame of the traveling body and both ends of a swinging plate swingably provided on the upper part of the frame, and pressure oil is supplied to the swinging hydraulic cylinders. A hydraulic pump, a swinging directional switching valve that controls the direction of pressure oil supplied from the hydraulic pump to the swinging hydraulic cylinder, and a pipe line that connects the swinging directional switching valve and the swinging hydraulic cylinder. A hydraulic circuit for swinging a revolving body of a revolving work vehicle, characterized in that a stop valve is provided in the pipe line.