JPS61187775U

JPS61187775U -

Info

Publication number: JPS61187775U
Application number: JP7221185U
Authority: JP
Priority date: 1985-05-17
Filing date: 1985-05-17
Publication date: 1986-11-22

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すステアリング
油圧回路の機構図、第２図は第１図のロータリー
ジヨイント部分の横断面図、第３図は第１図の作
動状態を示す機構図、第４図は第２図の作動状態
を示す横断面図、第５図は従来例を示す全旋回式
油圧シヨベルの側面図、第６図は第５図のステア
リング油圧回路の機構図、第７図は下部走行体に
対する上部旋回体の通常配置を示す油圧シヨベル
の側面図、第８図は第７図のハンドルとフロント
ホイールの作動および操向方向との関連図、第９
図は上部旋回体を前、後逆向きに旋回した場合を
示す油圧シヨベルの側面図、第１０図は第９図の
ハンドルとフロントホイールの作動および操向方
向との関連図である。ｂ：下部走行体、ｄ：上部旋回体、２：ステア
リングアクチユエータ、２ａ，２ｂ：室（アクチ
ユエータ）、３：ハンドル、４：ステアリングバ
ルブ、１０：ロータリージヨイント、１５：アウ
トサイドボデイ、１６：インサイドボデイ、１７
ａ，１７ｂ―１８ａ，１８ｂ：分割溝。 Fig. 1 is a mechanical diagram of a steering hydraulic circuit showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the rotary joint portion of Fig. 1, and Fig. 3 is a mechanical diagram showing the operating state of Fig. 1. , FIG. 4 is a cross-sectional view showing the operating state of FIG. 2, FIG. 5 is a side view of a conventional full swing type hydraulic excavator, and FIG. 6 is a mechanical diagram of the steering hydraulic circuit shown in FIG. Fig. 7 is a side view of a hydraulic excavator showing the normal arrangement of the upper revolving structure with respect to the lower traveling structure; Fig. 8 is a diagram of the relationship between the handle and the front wheel in Fig. 7 and the operation and steering direction; Fig. 9
The figure is a side view of the hydraulic excavator showing the case where the upper revolving structure is turned in opposite directions, and FIG. 10 is a diagram showing the relationship between the operation and steering direction of the handle and front wheel shown in FIG. 9. b: lower traveling body, d: upper rotating body, 2: steering actuator, 2a, 2b: chamber (actuator), 3: handle, 4: steering valve, 10: rotary joint, 15: outside body, 16 : Inside body, 17
a, 17b-18a, 18b: dividing groove.

Claims

[Scope of utility model registration request]

In a steering hydraulic circuit for a full swing vehicle, which is connected to a steering actuator on a lower rotating body side from an upper rotating body side via a steering valve and a rotary joint having an outside body and an inside body that are rotated relative to each other, Steering for a full-turn vehicle, characterized in that a circumferential groove of an inside body is divided into two to form a pair of dividing grooves, and both dividing grooves are individually connected to both chambers of the steering actuator. Hydraulic circuit.