JPH0462009U

JPH0462009U -

Info

Publication number: JPH0462009U
Application number: JP10617790U
Authority: JP
Priority date: 1990-10-09
Filing date: 1990-10-09
Publication date: 1992-05-27

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す要部の側面図
、第２図は第１図のＡ矢視図、第３図は第１図の
Ｂ矢視図、第４図は要部の拡大平面図、第５図は
ベルトテンシヨンを低速「入」高速「切」にした
状態の拡大側面図、第６図はベルトテンシヨンを
低速「切」高速「入」にした状態の拡大側面図、
第７図は副変速レバーおよび切り替え用カムの拡
大側面図、第８図は副変速レバーおよび切り替え
用カムの拡大正面図、第９図は高速用タイトアー
ムの側面図、第１０図は高速用タイトアームの横
断面図、第１１図はベルトテンシヨン装置に油圧
ポンププーリを組み込んだ状態の側面図、第１２
図は本考案を適用した乗用型田植機（移動農機）
全体の側面図である。１……前輪、２……後輪、３……機体フレーム
、４……エンジン、５……走行車体、６……昇降
リンク、７……苗植付け部、８……運転座席、９
……操向ハンドル、１０……主変速レバー、１１
……副変速レバー、１２……クラツチペダル、１
３……ミツシヨンケース、１４……エンジンプー
リ、１５……ミツシヨンプーリ、１６……高速用
伝動ベルト、１７……低速用伝動ベルト、１８，
１９……ベルトガイド、２０……高速用タイトア
ーム、２１……低速用タイトアーム、２２……軸
、２３，２４……スプリング、２５，２６，４０
……テンシヨンプーリ、２７，２８……転子、２
９……高速用カム、３０……低速用カム、３１…
…回転軸、３２……ニユートラル位置、３３……
低速作動位置、３４……高速作動位置、３５……
クラツチロツド、３６……逆テンシヨンプーリ、
３７……ロツド、３８……油圧ポンププーリ、３
９……油圧ポンプ駆動ベルト。 Fig. 1 is a side view of the main parts showing an embodiment of the present invention, Fig. 2 is a view taken in the direction of arrow A in Fig. 1, Fig. 3 is a view taken in the direction of arrow B in Fig. 1, and Fig. 4 is the main part. Figure 5 is an enlarged side view with the belt tension set to low speed "on" and high speed "off", and Figure 6 is an enlarged view of the belt tension set to low speed "off" and high speed "on". Side view,
Fig. 7 is an enlarged side view of the sub-shift lever and switching cam, Fig. 8 is an enlarged front view of the sub-shift lever and switching cam, Fig. 9 is a side view of the tight arm for high-speed use, and Fig. 10 is for high-speed use. Figure 11 is a cross-sectional view of the tight arm, and Figure 11 is a side view of the belt tensioning device with the hydraulic pump pulley installed.
The figure shows a riding rice transplanter (mobile agricultural machine) to which this invention is applied.
It is a side view of the whole. 1... Front wheel, 2... Rear wheel, 3... Airframe frame, 4... Engine, 5... Traveling vehicle body, 6... Lifting link, 7... Seedling planting section, 8... Driver seat, 9
... Steering handle, 10 ... Main gear shift lever, 11
... Sub-shift lever, 12 ... Clutch pedal, 1
3...Mission case, 14...Engine pulley, 15...Mission pulley, 16...High speed transmission belt, 17...Low speed transmission belt, 18,
19...Belt guide, 20...Tight arm for high speed, 21...Tight arm for low speed, 22...Shaft, 23, 24...Spring, 25, 26, 40
...Tension pulley, 27, 28... Trochanter, 2
9...High-speed cam, 30...Low-speed cam, 31...
... Rotation axis, 32 ... Neutral position, 33 ...
Low-speed operating position, 34...High-speed operating position, 35...
Clutch rod, 36...Reverse tension pulley,
37... Rod, 38... Hydraulic pump pulley, 3
9...Hydraulic pump drive belt.

Claims

[Claim for Utility Model Registration] A plurality of transmission belts are installed in parallel between the output pulley and the input pulley, each with a different transmission ratio, and each transmission belt has a tight arm for low speed and a tight arm for high speed installed coaxially. Selectively turn on or off the tight arm
In a belt tensioning device for a mobile agricultural machine that is operated to change speed, the transmission belt is tensioned by the low-speed tight arm only when the low-speed tight arm is turned on to the high-speed tight arm. A belt tensioning device for a mobile agricultural machine, characterized in that a reverse tension pulley is provided for applying a reverse tension to the side of the belt opposite to the side on which the tension is applied.