JPH0293561U

JPH0293561U -

Info

Publication number: JPH0293561U
Application number: JP117189U
Authority: JP
Priority date: 1989-01-11
Filing date: 1989-01-11
Publication date: 1990-07-25

Description

[Brief explanation of drawings]

図面は本考案の一実施例を示し、第１図は副変
速レバーと切換レバーとを連動する牽制装置の側
面図、第２図は第１図の要部縦断後面図、第３図
Ａ〜第３図Ｄは牽制機構の作用説明図、第４図は
農用トラクタにおける動力伝達装置の縦断側面図
、第５図は動力伝達装置の系統図、第６図は本考
案を装備した農用トラクタの概略側面図である。１２……ＰＴＯ変速機構、１４……主変速装置
、１５……超低速機構、１６……差動機構、２９
……主変速軸、３４……副変速軸、４２……ピニ
オン軸、４３……副変速歯車、５４……超低速歯
車、６６……ＰＴＯ軸、７２……シフトフオーク
、７３……シフト軸、７５……副変速レバー、７
６……シフトフオーク、７７……シフト軸、７９
……切換レバー、８０……牽制機構、８１……牽
制プレート、８１ａ……牽制部、８３……連結子
、８４……牽制ピン、８５……連動アーム、８６
……連動アーム、８７……連結ピン、８９……連
結ロツド、９０……Ｗナツト、９２……副変速機
構、Ｍ……ミツシヨンケース。 The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a restraining device that interlocks the sub-shift lever and the switching lever, Fig. 2 is a longitudinal cross-sectional rear view of the main part of Fig. 1, and Fig. 3A-3. Fig. 3D is an explanatory diagram of the action of the check mechanism, Fig. 4 is a longitudinal cross-sectional side view of the power transmission device in the agricultural tractor, Fig. 5 is a system diagram of the power transmission device, and Fig. 6 is the illustration of the agricultural tractor equipped with the present invention. FIG. 12... PTO transmission mechanism, 14... Main transmission device, 15... Ultra low speed mechanism, 16... Differential mechanism, 29
... Main transmission shaft, 34 ... Sub-transmission shaft, 42 ... Pinion shaft, 43 ... Sub-transmission gear, 54 ... Ultra-low speed gear, 66 ... PTO shaft, 72 ... Shift fork, 73 ... Shift shaft , 75...Sub-shift lever, 7
6...Shift fork, 77...Shift shaft, 79
...Switching lever, 80...Checking mechanism, 81...Checking plate, 81a...Checking portion, 83...Connector, 84...Checking pin, 85...Interlocking arm, 86
... Interlocking arm, 87 ... Connection pin, 89 ... Connection rod, 90 ... W nut, 92 ... Sub-transmission mechanism, M ... Mission case.

Claims

[Scope of utility model registration request]

In an agricultural tractor having a transmission in which a main transmission mechanism, an auxiliary transmission mechanism, and an ultra-low speed mechanism are built-in, an auxiliary transmission lever that shifts the auxiliary transmission mechanism through three speeds of high speed, medium speed, and low speed, and an ultra-low speed mechanism are provided. A check mechanism is installed between the switching lever that switches between the on position and the off position, so that the switching lever is in the on position only when the sub-shift lever is in the medium speed position, and when the switching lever is in the on position, it is in the high speed or low speed position. A sub-shift lever restraining device for an agricultural tractor configured to move the sub-shift lever to a medium speed position.