JPS6382628U

JPS6382628U -

Info

Publication number: JPS6382628U
Application number: JP17859986U
Authority: JP
Priority date: 1986-11-19
Filing date: 1986-11-19
Publication date: 1988-05-31
Also published as: JPH0414270Y2

Description

[Brief explanation of the drawing]

図面は本考案に係る作業車の前輪変速操作構造
の実施例を示し、第１図は変速レバーと第１・第
２副変速装置との連係構造、及び切換レバーと前
輪変速装置との連係構造を示す分解斜視図、第２
図は切換レバーと前輪変速装置との連係部付近の
正面図、第３図は切換レバー周りの側面図、第４
図は切換レバーのレバーガイドの平面図、第５図
は変速レバーのポジシヨンｆ_４への操作が阻止さ
れている状態を示す平面図、第６図は切換レバー
のポジシヨン４ＷＤ―への操作が阻止されてい
る状態を示す平面図、第７図は農用トラクタの全
体側面図、第８図は別実施例における操作牽制系
の側面図、第９図は第８図における―方向か
らの矢視図、第１０図は第８図において第１・第
２変速レバーを共に高速側の操作した状態での
―方向からの矢視図である。１……前輪、１０……前輪変速装置、１２……
操縦ハンドル、１３……変速レバー、１４……切
換レバー。 The drawings show an embodiment of the front wheel gear shift operation structure for a working vehicle according to the present invention, and FIG. 1 shows the linkage structure between the gear shift lever and the first and second sub-transmission devices, and the linkage structure between the switching lever and the front wheel transmission device. Exploded perspective view showing the second
The figure is a front view of the area where the switching lever connects with the front wheel transmission. Figure 3 is a side view of the area around the switching lever.
The figure is a plan view of the lever guide of the switching lever, Figure 5 is a plan view showing a state in which operation of the gear shift lever to position _f4 is blocked, and Figure 6 is a plan view showing a state in which operation of the gear change lever to position 4WD- is blocked. 7 is an overall side view of the agricultural tractor, FIG. 8 is a side view of an operation check system in another embodiment, and FIG. 9 is a view taken from the - direction in FIG. 8. , FIG. 10 is a view taken from the - direction in FIG. 8 with both the first and second shift levers being operated to the high speed side. 1...Front wheel, 10...Front wheel transmission, 12...
Control handle, 13...shift lever, 14...switch lever.

Claims

[Scope of utility model registration request]

A standard drive state in which the transmission system to the steerable front wheels 1 is transmitted at a drive speed approximately equal to the rear wheel drive speed;
It is equipped with a front wheel transmission 10 that switches to an increased speed driving state in which transmission is performed at a drive speed higher than the rear wheel drive speed, and includes a control handle 12 and the front wheel transmission 10.
The front wheel transmission operation structure of a work vehicle is configured such that the front wheel transmission device 10 is operated to the speed-increasing drive side by a steering operation of a predetermined angle or more from a straight-ahead state, in which the steering handle 12 When the switching lever 14 that switches the front wheel transmission 10 between the linked state and the released state is operated to the linked position, the operation of the speed change lever 13 for traveling toward the high speed side is mechanically checked and prevented, and the speed change lever 13 A front wheel shift operation structure for a working vehicle is configured to mechanically check and prevent the switching lever 14 from being operated to the linking side when the switching lever 14 is operated to the high speed side.