JPS6037841Y2 - Work vehicle suspension structure - Google Patents

Description

【考案の詳細な説明】 本考案は、機体フレーム側から連設した上下揺動自在な
サスペンションアームの先端部と、駆動操向車輪側から
連設のアームとを、前記駆動操向車輪の回動軸芯よりも
下側において操向軸芯周りに揺動自在に枢支連結しであ
る作業車のサスペンション構造に関し、その目的は、簡
単な構造改良をもって、サスペンションアームの最低地
上高を高くして、特に、圃場等、悪路走行時におけるサ
スペンションアームの変形、破損を極力抑制できるよう
にする点点にある。[Detailed description of the invention] The present invention connects the tip of a vertically swingable suspension arm connected from the aircraft frame side and the arm connected from the drive steering wheel side to rotate the drive steering wheel. The purpose of the suspension structure of a working vehicle is to increase the minimum ground clearance of the suspension arm through a simple structural improvement, which is pivotally connected to the steering axis below the driving axis. In particular, the aim is to minimize deformation and damage of the suspension arm when driving on rough roads such as in fields.

先ず、本考案の実施例を図面に基づいて説明すると、第
１図に示すように、荷台２の前部に設けた運転キャビン
１下に、エンジン１２、ミッションケース１３を配設す
るとともに、前記ミッションケース１３にユニバーサル
ジヨイント付伝動軸１４．１５を介して連動する前後デ
フケース１６．１７を設け、かつ、前側デフケース１６
にユニバーサルジヨイント付の伝動軸１８９ １８ ヲ
介して連動する左右一対の操向駆動車輪３，３と、後側
デフケース１７に連動する左右一対の駆動後車輪４，４
とを有する運搬車（作業車の一例）において、前記前車
輪３，３のサスペンションを次のように構成する。First, an embodiment of the present invention will be described based on the drawings. As shown in FIG. The transmission case 13 is provided with front and rear differential cases 16 and 17 that are interlocked via a transmission shaft with a universal joint 14 and 15, and the front differential case 16
A pair of left and right steering drive wheels 3, 3 are interlocked via a power transmission shaft 189 with a universal joint 18, and a pair of left and right rear drive wheels 4, 4 are interlocked with the rear differential case 17.
In the transport vehicle (an example of a working vehicle) having the following structure, the suspension of the front wheels 3, 3 is configured as follows.

つまり、第２図、第３図に示すように、機体フレーム５
に、平面視においてＸ字形で正面視中央を上方へ彎曲さ
せた形状としたサスペンションフレーム６を前記伝動軸
１８上方に、左右一対の二股状先端が夫々この伝動軸１
８を挾んで前後両側に位置する状態で、配置すると共に
機体フレーム５側の二股状先端を前後軸芯Ｘ周りに上下
揺動自在に枢着し、このサスペンションフレーム６の二
股状先端間に亘って固着したロアーアーム６ａと、ドラ
ムブレーキ内装の前車輪取付は部材７に固着のアーム８
とを、ロアーアーム６ａがアーム８の上側に重合位置す
る状態で前車輪３の回動軸芯ａよりも下側において操向
軸芯す周りに揺動自在に枢支連結するとともに、その上
端において機体フレーム５に前記操向軸芯すに沿った姿
勢で連結し、かつ、サスペンションコイルスプリング９
が套嵌されたショックアブソーバ−１０の下端と、前記
アーム８と一体一連状態のアーム１１とを前記前車輪回
動軸芯ａよりも上側において操向軸芯す周りに揺動自在
に枢支連結して、所謂、マクファーソン型のサスペンシ
ョンに構成スる。In other words, as shown in FIGS. 2 and 3, the fuselage frame 5
A suspension frame 6 having an X-shape in plan view with the center curved upward in front view is placed above the transmission shaft 18, and a pair of left and right bifurcated tips are connected to the transmission shaft 1, respectively.
The suspension frame 6 is placed so that it is located on both the front and rear sides with the suspension frame 8 in between, and the bifurcated tip on the fuselage frame 5 side is pivoted so as to be vertically swingable around the longitudinal axis X. The lower arm 6a is fixed to the member 7, and the arm 8 is fixed to the member 7 for mounting the front wheel inside the drum brake.
The lower arm 6a is pivotally connected to the steering axis below the rotation axis a of the front wheel 3 with the lower arm 6a superimposed on the upper side of the arm 8, and at the upper end thereof. A suspension coil spring 9 is connected to the fuselage frame 5 in a posture along the steering axis.
The lower end of the shock absorber 10 in which the shock absorber 10 is fitted, and the arm 11 that is integrally connected with the arm 8 are pivotably pivoted about the steering axis above the front wheel rotation axis a. They are connected to form a so-called MacPherson type suspension.

以上要するに、本考案による作業車のサスペンション構
造は、官記構造において、前記サスペンションアーム６
を平面視中央部で一体結合されたＸ字形で、正面視中央
部を上方へ彎曲させた形状に構成すると共に、操向車輪
３への伝動軸１８上方に、アーム６の二股状先端は該伝
動軸１８を挾んで前後両側に位置する状態で配設し、前
記伝動軸１８と車輪との連結点下に操向車輪３側に連設
したアーム８を位置させ、このアーム８の下側縁よりも
上方で前記両軸の連結点よりも下方位置においてアーム
６の二股状先端間に固着したロアーアーム６ａを夫々枢
支連結しであることを特徴とする。In summary, the suspension structure of the working vehicle according to the present invention has the suspension arm 6 in the official structure.
The arms 6 have an X-shape that is integrally connected at the center in a plan view, and are curved upward in the center in a front view. An arm 8 is disposed so as to sandwich the transmission shaft 18 on both front and rear sides, and is connected to the steering wheel 3 side below the connection point between the transmission shaft 18 and the wheels. The lower arm 6a is fixed between the bifurcated tips of the arm 6 at a position above the edge and below the connecting point of the two shafts, and is pivotally connected to the lower arm 6a.

即ち、サスペンションアーム先端部６ａを前記アーム８
の上側に重合位置させて両者６ａ、８を枢支連結すると
いった簡単な配置改良を施すことのみによって、サスペ
ンションアーム先端部６ａをアーム８の下側に重合位置
させて成る従来構造に比較して、サスペンションアーム
先端部６ａを、アーム８の上下高さ分だけ高く位置させ
て、サスペンションアーム６の最低地上高を高くできる
上に、サスペンションアーム８本体も伝動軸の上方に配
置した構成も加味されてサスペンションアーム全体の最
低地上高が格段に高くなるから、悪路走行、特に畦越え
走行においてサスペンションアーム６の特に、その先端
部６ａ及びその近くが畦等に接当することを抑制して、
サスペンションの変形、破損を極力抑制できるに至った
。That is, the suspension arm tip 6a is connected to the arm 8.
By making a simple arrangement improvement such as placing them in an overlapping position on the upper side and pivotally connecting both 6a and 8, compared to the conventional structure in which the suspension arm tip 6a is placed in an overlapping position on the lower side of the arm 8, , the suspension arm tip 6a is positioned higher by the vertical height of the arm 8 to increase the minimum ground clearance of the suspension arm 6, and the suspension arm 8 body is also arranged above the transmission shaft. Since the minimum ground clearance of the entire suspension arm is significantly increased, when driving on rough roads, especially when driving over ridges, the suspension arm 6, especially its tip 6a and its vicinity, can be prevented from coming into contact with ridges, etc.
This made it possible to minimize suspension deformation and damage.

しかもサスペンションアームは中央部が一体結合された
平面視Ｘ形に形成されるために、大きな強度を有した丈
夫なサスペンションアームであるから、じやり道や山間
の凸凹道等の悪路走行にも強いサスペンション構造が得
られる利点がある。Moreover, since the suspension arm is formed into an X-shape in plan view with the central part integrally joined, it is a durable suspension arm with great strength, so it can be used even when driving on rough roads such as sloped roads and uneven roads in the mountains. This has the advantage of providing a strong suspension structure.

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

図面は本考案に係る作業車のサスペンション構造の実施
例を示し、第１図は全体の一部切欠き側面図、第２図は
要部の縦断拡大正面図、第３図は要部の拡大平面図であ
る。 ５・・・・・・機体フレーム、６・・・・・・サスペン
ションアーム、３・・・・・・駆動操向車輪、８・・・
・・・アーム、６ａ・・・・・中アーアーム、１８・・
・・・・伝動軸。The drawings show an embodiment of the suspension structure for a working vehicle according to the present invention, with Fig. 1 being a partially cutaway side view of the entire structure, Fig. 2 being an enlarged vertical front view of the main part, and Fig. 3 being an enlarged view of the main part. FIG. 5...Airframe frame, 6...Suspension arm, 3...Drive steering wheel, 8...
...Arm, 6a...Middle arm, 18...
...Transmission shaft.

Claims (1)

【実用新案登録請求の範囲】 ■ 機体フレーム５側から連設した上下揺動自在なサス
ペンションアーム６の先端部６ａと、駆動操向車輪３側
から連設のアーム８とを、前記駆動操向車輪３の回動軸
芯ａよりも下側において操向軸芯す周りに揺動自在に枢
支連結しである作業車のサスペンション構造において、
前記サスペンションアーム６を平面視中央部で一体結合
されたＸ字形で、正面視中央部を上方へ彎曲させた形状
に構成すると共に、操向車輪３への伝動軸１８上方に、
アーム６の二股状先端は該伝動軸１８を挾んで前後両側
に位置する状態で配設し、前記伝動軸１８と車軸との連
結点下に操向車輪３側に連設したアーム８を位置させ、
このアーム８の下側縁よりも上方で前記両軸の連結点よ
りも下方位置においてアーム６の二股状先端間に固着し
たロアーアーム６ａを夫々枢支連結しである作業車のサ
スペンション構造。 ■ 前記のアーム８は、前記回動軸芯ａの上側において
ショックアブソーバ１０の下端に操向軸芯す周りに揺動
自在に連結の上側アーム１１と一体一連の状態に構成さ
れている実用新案登録請求の範囲第■項記載の作業車の
サスペンション構造。[Scope of Claim for Utility Model Registration] ■ The tip portion 6a of the vertically swingable suspension arm 6 connected from the aircraft frame 5 side and the arm 8 connected from the drive steering wheel 3 side are connected to the drive steering wheel 3. In a suspension structure for a work vehicle, the suspension structure of a working vehicle is pivotally connected to the steering axis below the rotation axis a of the wheel 3 so as to be swingable about the steering axis.
The suspension arm 6 is formed into an X-shape that is integrally connected at the central part in a plan view, and the central part in the front view is curved upward, and above the transmission shaft 18 to the steering wheel 3,
The bifurcated ends of the arm 6 are arranged so as to sandwich the transmission shaft 18 and are located on both front and rear sides, and the arm 8 connected to the steering wheel 3 side is positioned below the connection point between the transmission shaft 18 and the axle. let me,
A suspension structure for a working vehicle, in which lower arms 6a are fixed between the bifurcated tips of the arm 6 at a position above the lower edge of the arm 8 and below the connecting point of the two shafts, respectively, and are pivotally connected to each other. (2) A utility model in which the arm 8 is integrally connected to an upper arm 11 which is connected to the lower end of the shock absorber 10 above the rotation axis a so as to be swingable around the steering axis. A suspension structure for a work vehicle as set forth in registered claim No. (2).