JPH0248485U

JPH0248485U -

Info

Publication number: JPH0248485U
Application number: JP12694388U
Authority: JP
Priority date: 1988-09-28
Filing date: 1988-09-28
Publication date: 1990-04-04

Description

[Brief explanation of drawings]

図面は本考案に係る作業車用の操向操作装置の
実施例を示し、第１図は切り換え弁の操作構造を
示す伝動ケースの正面図、第２図は切り換え位置
の説明図、第３図は油圧回路を示す図面、第４図
はコンバインの前部側面図、第５図及び第６図は
別実施例における切り換え弁の操作構造を示す図
面である。１……走行装置、５……クラツチ、６……ブレ
ーキ、８……操向用アクチユエータ、９……切り
換え弁、１０……手動操向用レバー、１１……ソ
レノイド、１１ａ……可動部、１２……操作部材
、１４ａ……融通部、１６……中継部材、２２…
…ダンパ。 The drawings show an embodiment of the steering operation device for a working vehicle according to the present invention, FIG. 1 is a front view of a transmission case showing the operation structure of the switching valve, FIG. 2 is an explanatory diagram of the switching position, and FIG. 3 4 is a front side view of the combine harvester, and FIGS. 5 and 6 are drawings showing the operating structure of the switching valve in another embodiment. DESCRIPTION OF SYMBOLS 1... Traveling device, 5... Clutch, 6... Brake, 8... Steering actuator, 9... Switching valve, 10... Manual steering lever, 11... Solenoid, 11a... Movable part, 12... Operation member, 14a... Flexibility part, 16... Relay member, 22...
…damper.

Claims

[Scope of utility model registration request]

For each transmission system for the pair of left and right traveling devices 1,
A steering clutch 5 for turning on and off transmission of driving force, a brake 6 for braking the traveling device 1, and as the clutch 5 is further operated from the disengaged state to the disengaged side, the brake 6 applies braking. a hydraulic steering actuator 8 that operates the clutch 5 and the brake 6 in conjunction so as to switch from a released state to a braking state;
The steering actuator 8 is placed in a clutch engaged position where the clutch 5 is engaged and the brake 6 is released, and a brake applied position where the clutch 5 is disengaged and the brake 6 is in a braking state. A steering operation device for a work vehicle, which is provided with a switching valve 9 that is operated over the entire range, and a manual steering lever 10 that switches the switching valve 9 between the clutch engagement position and the brake activation position. Based on a steering command, the switching valve 9 is moved to the clutch engaged position, the brake 6 is in the released state, and the clutch 5 is in the engaged position.
An automatic steering solenoid 11 is provided, which is operated to switch between the clutch disengaged position and the clutch disengaged position where only the manual steering lever 10 and the switching valve 9 are operated by the automatic steering solenoid 11. The movable portion 11a of the automatic steering solenoid 11 and the operating member of the switching valve 9 are interlocked and connected via a flexible portion 14a that allows switching operation of the switching valve 9 from the clutched position to the clutched disengaged position. Reference numeral 12 denotes a steering operation device for a working vehicle that is interlocked and connected via an elastically deformable relay member 16 or a damper 22.