JPH027019U

JPH027019U -

Info

Publication number: JPH027019U
Application number: JP8321888U
Authority: JP
Priority date: 1988-06-23
Filing date: 1988-06-23
Publication date: 1990-01-17
Anticipated expiration: 2003-06-23
Also published as: JP2509133Y2

Description

[Brief explanation of drawings]

図面は本考案に係る農用トラクタにおける前輪
増速操作装置の一実施例を示すものであつて、第
１図は農用トラクタのミツシヨンの一部側面図、
第２図は同上正面図、第３図は前輪変速装置の断
面図、第４図は副変速レバー及び切換レバー部分
の一部分解斜視図、第５図は油圧系統の回路図、
第６図はその電磁弁の電気回路図、第７図は副変
速レバー及び切換レバー部分の全体側面図、第８
図は同上正面図、第９図は操作機構部の一部断面
図である。図中、１はミツシヨン、２は副変速レバー、３
は前輪変速装置、４は切換レバー、５は回動支軸
、９はレバーガイド、３７，３８は検出スイツチ
、３９はブラケツト。 The drawings show an embodiment of the front wheel speed increasing operation device for an agricultural tractor according to the present invention, and FIG. 1 is a partial side view of the transmission of the agricultural tractor;
Figure 2 is a front view of the same as above, Figure 3 is a sectional view of the front wheel transmission, Figure 4 is a partially exploded perspective view of the sub-shift lever and switching lever, Figure 5 is a circuit diagram of the hydraulic system,
Figure 6 is an electric circuit diagram of the solenoid valve, Figure 7 is an overall side view of the sub-shift lever and switching lever, and Figure 8 is an electrical circuit diagram of the solenoid valve.
The figure is a front view of the same as above, and FIG. 9 is a partial sectional view of the operating mechanism section. In the diagram, 1 is the transmission, 2 is the sub-shift lever, and 3 is the transmission lever.
4 is a front wheel transmission, 4 is a switching lever, 5 is a pivot shaft, 9 is a lever guide, 37 and 38 are detection switches, and 39 is a bracket.

Claims

[Scope of utility model registration request]

A front wheel speed increasing operation in which a front wheel transmission having a drive state switching mechanism is interposed in a front wheel transmission system, and the front wheel transmission is switched to a front wheel non-drive position, a front wheel drive position, and a front wheel speed increase standby position using a switching lever. In the device, the switching lever of the front wheel transmission and the rotational support shaft of the sub-shift lever of the transmission, the lever guide of the switching lever, a detection switch that detects that the switching lever is in the front wheel speed increase standby position, and the sub-shift lever are set to high speed. Attach a detection switch, etc. that detects a position other than the position to the bracket, and integrate them.
A front wheel speed increasing operation device for an agricultural tractor, characterized in that the bracket is attached to a transmission.