JPH0398359U

JPH0398359U -

Info

Publication number: JPH0398359U
Application number: JP629190U
Authority: JP
Priority date: 1990-01-26
Filing date: 1990-01-26
Publication date: 1991-10-11
Anticipated expiration: 2005-01-26
Also published as: JP2536487Y2

Description

【図面の簡単な説明】[Brief explanation of drawings]

図面は本考案の一実施例を示すものであつて、
第１図は前輪変速装置の断面図、第２図は走行伝
動装置の伝動系統図、第３図は変速切換操作部の
縦断面図、第４図は同上横断面図、第５図は変速
操作部の斜視図、第６図は同上前輪増速待機部の
断面図、第７図は油圧回路図、第８図は制御回路
図、第９図は農用トラクタの側面図、第１０図は
変速スリーブの位置決め装置を示すための前輪変
速装置の断面図、第１１図は同上横断面図、第１
２図は組み立て調節状態を示す断面図、第１３図
は同上完了状態を示す断面図である。７……クラツチハウジング、８……ミツシヨン
ケース、１６……駆動軸、１９……歯車、２０ａ
，２０ｂ……変速駆動歯車、２３……従動軸、２
４，２６……変速従動歯車、２５……ボス、２８
……ボール、３０……切換スリーブ、３６……湿
式多板クラツチ。 The drawings show one embodiment of the present invention,
Fig. 1 is a sectional view of the front wheel transmission, Fig. 2 is a transmission system diagram of the traveling transmission, Fig. 3 is a longitudinal sectional view of the gear change operation section, Fig. 4 is a cross-sectional view of the same as above, and Fig. 5 is the gear shift diagram. FIG. 6 is a sectional view of the front wheel speed increase standby section, FIG. 7 is a hydraulic circuit diagram, FIG. 8 is a control circuit diagram, FIG. 9 is a side view of the agricultural tractor, and FIG. 10 is a perspective view of the operating section. 11 is a cross-sectional view of the front wheel transmission to show the positioning device of the speed-changing sleeve; FIG.
FIG. 2 is a cross-sectional view showing the assembly adjustment state, and FIG. 13 is a cross-sectional view showing the same completed state. 7...Clutch housing, 8...Mission case, 16...Drive shaft, 19...Gear, 20a
, 20b... variable speed drive gear, 23... driven shaft, 2
4, 26...Speed driven gear, 25...Boss, 28
...Ball, 30...Switching sleeve, 36...Wet type multi-disc clutch.

Claims

【実用新案登録請求の範囲】 (1) 前輪変速機構を、後輪伝動系に連動すると
共に一対の変速駆動歯車２０ａ，２０ｂを有する
前輪駆動軸１６と、該前輪駆動軸１６と平行で前
輪に伝動すると共に上記変速駆動歯車２０ａ，２
０ｂにそれぞれ噛合する一対の変速従動歯車２４
，２６を回転自在に支承した従動軸２３と、それ
らの変速従動歯車２４，２６間に介装した変速切
換手段とにより構成した農用トラクタにおいて、
大径の変速従動歯車２４にはボールロツク機構を
付設し、小径の変速従動歯車２６には湿式多板ク
ラツチ３６を付設し、該湿式多板クラツチ３６と
ボールロツク機構との間にそれらを断続する切換
スリーブ３０を介装したことを特徴とする農用ト
ラスタにおける前輪変速装置。 (2) 前記湿式多板クラツチのボスの内周の切換
スリーブ側にぬすみ部を設け、切換スリーブの内
周部を上記湿式多板クラツチ側へ延出し、この延
出部を前記盗み部に貫挿すると共に従動軸にスプ
ライン嵌合した請求項１の農用トラクタにおける
前輪変速装置。[Claims for Utility Model Registration] (1) A front wheel transmission mechanism is connected to a front wheel drive shaft 16 that is interlocked with a rear wheel transmission system and has a pair of speed change drive gears 20a and 20b, and a front wheel drive shaft 16 that is parallel to the front wheel drive shaft 16 and that is connected to the front wheels. The speed change drive gears 20a, 2
A pair of speed change driven gears 24 meshing with 0b, respectively.
, 26, and a speed change switching means interposed between the speed change driven gears 24, 26,
A ball lock mechanism is attached to the large diameter variable speed driven gear 24, a wet type multi-plate clutch 36 is attached to the small diameter variable speed driven gear 26, and a switching mechanism is provided between the wet type multi plate clutch 36 and the ball lock mechanism to connect and connect them. A front wheel transmission device for an agricultural truster, characterized in that a sleeve 30 is interposed. (2) A slotted part is provided on the switching sleeve side of the boss of the wet type multi-disc clutch, the inner peripheral part of the switching sleeve extends toward the wet type multi-disc clutch, and this extended part is inserted into the tapped part. 2. A front wheel transmission for an agricultural tractor according to claim 1, wherein the transmission is spline-fitted to the driven shaft.