JPS6281666U

JPS6281666U -

Info

Publication number: JPS6281666U
Application number: JP17245185U
Authority: JP
Priority date: 1985-11-09
Filing date: 1985-11-09
Publication date: 1987-05-25

Description

[Brief explanation of the drawing]

図面は本考案に係る土工車の対地作業装置用操
作部の実施例を示し、第１図は要部の一部断面を
示す側面図、第２図は要部平面図、第３図は比例
制御弁の操作系を示すブロツク図、第４図は調速
状態を示すグラフ、第５図はバツクホウ作業車の
全体側面図、第６図及び第７図は夫々別実施例を
示す要部の一部断面を示す側面図である。９……メインバルブ、１０，１１……電磁比例
減圧弁、１３，１４……マニユアルオーバーライ
ド部、１５……ステツプ、２１……操作装置、Ａ
……対地作業装置、ＣＶ……電磁式比例制御弁、
Ｍ……油圧アクチユエータ。 The drawings show an embodiment of the operation part for the earth-working device of an earthmoving vehicle according to the present invention, in which Fig. 1 is a side view showing a partial cross section of the main part, Fig. 2 is a plan view of the main part, and Fig. 3 is a proportional view. FIG. 4 is a block diagram showing the operating system of the control valve, FIG. 4 is a graph showing the speed regulating state, FIG. 5 is an overall side view of the backhoe work vehicle, and FIGS. 6 and 7 are main parts showing different embodiments. It is a side view showing a partial cross section. 9... Main valve, 10, 11... Solenoid proportional pressure reducing valve, 13, 14... Manual override section, 15... Step, 21... Operating device, A
...ground work equipment, CV...electromagnetic proportional control valve,
M...Hydraulic actuator.

Claims

[Scope of utility model registration request]

An electromagnetic proportional control valve CV for the hydraulic actuator M that raises, lowers or rotates the ground work device A is concealed below the step 15 or within the cover, and the proportional control valve CV is connected to a pair of electromagnetic proportional pressure reducers that hydraulically operate the main valve 9. An earthwork in which a pair of manual override parts 13 and 14, which are equipped with valves 10 and 11 and which directly operate the electromagnetic proportional pressure reducing valves 10 and 11 respectively, are arranged side by side in substantially the same direction so as to be freely slidable against an urging force. In the vehicle, an operating device 21 for selectively operating the manual override sections 13 and 14 by forward and reverse movement is provided below the step 15 or inside the cover, and an operating lever is provided above the step 15 or outside the cover. The operating device 21 is provided so that its position can be freely changed between a protruding state and a retracting state below the step 15 or inwardly of the cover, and the operating device 21 is locked in a non-operating position with respect to the manual override portions 13 and 14. An operating section for a ground working device of an earthmoving vehicle, in which a locking device that can be released freely is disposed below the step 15 or inside the cover, and is formed so that it can be operated from the outside.