JPS6348401U

JPS6348401U -

Info

Publication number: JPS6348401U
Application number: JP14127786U
Authority: JP
Priority date: 1986-09-17
Filing date: 1986-09-17
Publication date: 1988-04-01

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の整畦機の使用状態
の斜視図、第２図はその一部を切欠した拡大背面
図、第３図はその油圧制御装置の拡大断面図、第
４図イはその作用の油吸入過程を示す図、ロはそ
の排出過程を示す図、第５図はこの実施例のピス
トン装置の説明図である。図中、Ｔはトラクタ、Ａは整畦機、４はロータ
、１は機枠、８は油圧ポンプ、８ｆは可撓性管、
９は油圧制御装置、９ａは筒体、９ｂは固定仕切
り板、９ｃは移動仕切り板、９ｄは油吸排出室、
９ｅはガス室、９ｂ―１は弁孔、９ｂ―２は弁球
、９ｂ―３はスプリング、９ｂ―５は流出孔、９
ｂ―６はオリフイスである。 Fig. 1 is a perspective view of a ridge straightening machine according to an embodiment of the present invention in use, Fig. 2 is an enlarged rear view with a part thereof cut away, Fig. 3 is an enlarged sectional view of its hydraulic control device, and Fig. 4 is an enlarged sectional view of the hydraulic control device. Figure A is a diagram showing the oil suction process of the operation, Figure B is a diagram showing the oil discharge process, and Figure 5 is an explanatory diagram of the piston device of this embodiment. In the figure, T is a tractor, A is a ridge straightening machine, 4 is a rotor, 1 is a machine frame, 8 is a hydraulic pump, 8f is a flexible pipe,
9 is a hydraulic control device, 9a is a cylindrical body, 9b is a fixed partition plate, 9c is a movable partition plate, 9d is an oil suction and discharge chamber,
9e is a gas chamber, 9b-1 is a valve hole, 9b-2 is a valve ball, 9b-3 is a spring, 9b-5 is an outflow hole, 9
b-6 is the orifice.

Claims

[Scope of utility model registration request]

A ridge leveling machine has an earth mowing rotor that excavates and mounds mud in the machine frame, and a ridge pounding plate that rams and hardens the mud mounded up by this earth raising rotor, and consists of a piston and a hydraulic cylinder that operate by transmitting power. a hydraulic pump, a piston device including a piston and a cylinder that moves the ridge beating plate forward and backward, and is operated by the hydraulic pump; a communication path that communicates the hydraulic pump and the piston device to allow oil to flow; pump,
It has a hydraulic control device that communicates with a hydraulic circuit consisting of a piston device and a communication passage, and the hydraulic control device has a valve mechanism that opens at a predetermined pressure or higher and closes at a pressure lower than the predetermined pressure in response to changes in the hydraulic pressure in the hydraulic circuit. , a movable partition plate that moves in search of an equilibrium point between the oil pressure of the oil sucked in from this valve mechanism and the gas pressure of the pre-filled gas, and only when this gas pressure becomes greater than the pressure of the hydraulic circuit. A ridge straightening machine comprising: an orifice that discharges oil into the hydraulic circuit by moving the movable partition plate.