JPH0364870U - - Google Patents

Description

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

第１図は本考案に係る増速切換機構を具備する
前輪舵取り車輌（トラクタ）の側面図、第２図は
同駆動系統図、第３図は増速切換機構の概略を示
す側面図、第４図は増速切換機構の拡大構造説明
図、第５図は操作機構の平面図、第６図はステア
リングギヤボツクスの一部切欠平面図、第７図は
同側断面図である。 図中、Ｂ……増速切換機構、Ｃ……操作機構、
Ｄ……操舵機構、１……前輪、２……後輪、１４
……前輪駆動軸、２１……フロントアクスルケー
ス、５５……ステアリングギヤボツクス、５８…
…ステアリング作動ギヤ、６１……作動突起、６
２……前後摺動体、６３……係合突起。 FIG. 1 is a side view of a front wheel steering vehicle (tractor) equipped with a speed increase switching mechanism according to the present invention, FIG. 2 is a drive system diagram thereof, and FIG. 3 is a side view schematically showing the speed increase switching mechanism. 4 is an enlarged structural explanatory diagram of the speed increasing switching mechanism, FIG. 5 is a plan view of the operating mechanism, FIG. 6 is a partially cutaway plan view of the steering gear box, and FIG. 7 is a sectional view of the same side. In the figure, B... speed increase switching mechanism, C... operating mechanism,
D... Steering mechanism, 1... Front wheel, 2... Rear wheel, 14
...Front wheel drive shaft, 21...Front axle case, 55...Steering gear box, 58...
...Steering operating gear, 61... Operating projection, 6
2... Front and rear sliding bodies, 63... Engaging protrusion.

Claims (1)

【実用新案登録請求の範囲】 前輪１と後輪２とを駆動可能に構成し、かつ、
前輪駆動軸１４とフロントアクスルケース２１と
の間に、等速・増速の切換が自在に増速切換機構
Ｂを介設して、ハンドル５０に連結する操舵機構
Ｄの舵取り操作により、同増速切換機構Ｂの操作
機構Ｃを作動させるべく構成した増速切換機構を
具備する前輪舵取り車輌において、 上記操舵機構Ｄに連設したステアリングギヤボ
ツクス５５内に、ハンドルの回転に対応して、正
逆回動するステアリング作動ギヤ５８を設け、同
ステアリング作動ギヤ５８に作動突起６１，６１
を設けると共に、増速切換機構Ｂの操作機構Ｃと
連結する前後摺動体６２を設け、同前後摺動体６
２に、ステアリング作動ギヤ５８の正逆回動に連
動して作動突起６１，６１と係合する係合突起６
３，６３を設け、かつ、前後摺動体６２の下部に
は同前後摺動体６２を上方に押圧する弾性手段６
７を位置させ、さらに、前後摺動体６２の上部に
は、前輪増速用操作レバー７４に連動して前後摺
動板６２を下向き方向に押圧する押下げ手段６８
を位置させて、ステアリング作動ギヤ５８と前後
摺動体６２との係合を解除可能に構成したことを
特徴とする増速切換機構を具備する前輪舵取り車
輌。[Claims for Utility Model Registration] The front wheels 1 and the rear wheels 2 are configured to be drivable, and
A speed increase switching mechanism B is interposed between the front wheel drive shaft 14 and the front axle case 21 so that the speed can be freely changed between constant speed and increased speed. In a front wheel steering vehicle equipped with a speed increasing switching mechanism configured to operate the operating mechanism C of the speed switching mechanism B, a steering gear box 55 connected to the steering mechanism D is provided with a steering gear box 55 that is configured to operate the operating mechanism C of the speed switching mechanism B. A steering operating gear 58 that rotates in the opposite direction is provided, and operating protrusions 61, 61 are provided on the steering operating gear 58.
At the same time, a front and rear sliding body 62 connected to the operating mechanism C of the speed increase switching mechanism B is provided, and the front and rear sliding body 6
2, an engaging protrusion 6 that engages with the operating protrusions 61, 61 in conjunction with forward and reverse rotation of the steering operating gear 58;
3 and 63, and elastic means 6 at the lower part of the front and rear sliding bodies 62 for pressing the front and rear sliding bodies 62 upward.
Further, on the upper part of the front and rear sliding body 62, there is a push-down means 68 that presses the front and rear sliding plate 62 in a downward direction in conjunction with the front wheel speed increasing operation lever 74.
1. A front wheel steering vehicle equipped with a speed increase switching mechanism, characterized in that the engagement between the steering operating gear 58 and the front and rear sliding bodies 62 can be released by positioning the steering gear 58 and the front and rear sliders 62.