JPH0325070U

JPH0325070U -

Info

Publication number: JPH0325070U
Application number: JP8627389U
Authority: JP
Priority date: 1989-07-21
Filing date: 1989-07-21
Publication date: 1991-03-14

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す全旋回式車両
の走行油圧回路の図、第２図は第１図のロータリ
ジヨイントの一部を示す斜視図、第３図は本考案
の一実施例を示す全旋回式車両の走行油圧回路の
図で第１図に対し上部旋回体が１８０度旋回した
状態を示し、第４図は第３図のロータリジヨイン
トの一部を示す斜視図、第５図は全旋回式油圧シ
ヨベルの側面図、第６図は従来の全旋回式車両の
走行油圧回路の図、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図は同平面図、第９図は上部旋回体を前
後逆向きに１８０度旋回した場合を示す油圧シヨ
ベルの側面図、第１０図は同平面図である。ｄ……上部旋回体、ｂ……下部走行体、ａ_１…
…右走行モーター、ａ_２……左走行モーター、１
０……ロータリジヨイント、５……右切換バルブ
、６……左切換バルブ、１，２……油圧ポンプ、
７……アウトサイドボデイ、８……インサイドボ
デイ、１１ａ，１１ｂ，１１ｃ，１１ｄ，１１′
ａ，１１′ｂ，１１′ｃ，１１′ｄ……分割溝、
ａ_１Ａ，ａ_２Ａ，ａ_１Ｂ，ａ_２Ｂ……ポート。 Fig. 1 is a diagram of a traveling hydraulic circuit of a full swing type vehicle showing an embodiment of the present invention, Fig. 2 is a perspective view showing a part of the rotary joint of Fig. 1, and Fig. 3 is an illustration of an embodiment of the present invention. This is a diagram of the traveling hydraulic circuit of a fully swinging vehicle showing an embodiment, showing a state in which the upper rotating body has turned 180 degrees with respect to FIG. 1, and FIG. 4 is a perspective view showing a part of the rotary joint in FIG. 3. , Fig. 5 is a side view of a full swing type hydraulic excavator, Fig. 6 is a diagram of the traveling hydraulic circuit of a conventional full swing type vehicle, and Fig. 7 is a diagram of a hydraulic excavator showing the normal arrangement of the upper rotating body with respect to the lower running body. FIG. 8 is a side view of the hydraulic excavator, FIG. 9 is a side view of the hydraulic excavator showing a case where the upper revolving body is rotated 180 degrees in the reverse direction, and FIG. 10 is a plan view thereof. d... Upper rotating body, b... Lower traveling body, _a1 ...
...Right travel motor, a ₂ ...Left travel motor, 1
0...Rotary joint, 5...Right switching valve, 6...Left switching valve, 1, 2...Hydraulic pump,
7...Outside body, 8...Inside body, 11a, 11b, 11c, 11d, 11'
a, 11'b, 11'c, 11'd...dividing groove,
a ₁ A, a ₂ A, a ₁ B, a ₂ B... port.

Claims

[Scope of utility model registration request]

An upper rotating body is rotatably mounted on the lower traveling body, and a left switching valve is connected to a left traveling motor and a right traveling motor of the lower traveling body through a rotary joint to stop the left and right traveling motors in forward and reverse directions, respectively. In a device in which the right switching valves are connected to each other, and the left switching valve and right switching valve are each connected to a hydraulic pump, the circumferential groove of the inside body constituting the rotary joint is set approximately halfway around the center axis. , a fully rotating vehicle characterized in that the two dividing grooves are arranged in upper and lower stages to form a pair of dividing grooves, and the pair of dividing grooves are respectively connected to ports of a left traveling motor and a right traveling motor that rotate in opposite directions. travel hydraulic circuit.