JPS6259144A - Dump truck - Google Patents

Abstract

PURPOSE:To apply average load on front and rear wheels of an off road driving heavy dump truck both in the loaded and unloaded conditions for improved durability by providing a load-carrying body substantially of an inverted triangular configuration seen from the side having the deepest portion disposed substantially at the central position between the front and rear wheels. CONSTITUTION:The heavy dump truck includes a main frame 1 having a front projection on which a driver's cab is placed and a front wheel support at which a gate-shaped frame 5 is erected upwardly, and an engine 6 and a transmission 7 are installed inside of the frame 5. The gate-shaped frame 5 supports at both right and left sides right and left front wheels 2 through suspensions 8, and the main frame 1 supports at the rear end rear wheels 3 through suspensions 9 and links 10. A load-carrying body 11 having a side configuration of a low inverted isosceles triangle is disposed, having the deepest portion thereof located substantially at one half the distance between the front and rear wheels 2, 3 and the rear bottom tiltingly supported on the rear end of the main frame 1.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、主としてオフロードを走行する大型のダンプ
トラックに関するものである。DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a large dump truck that primarily travels off-road.

従来の技術 従来の大型のダンプトラックは第２図に示すようになっ
ており、前後方向に短い荷箱ａがフレームｂの中間より
後側に搭載される構成となっていた。2. Description of the Related Art A conventional large-sized dump truck has a construction as shown in FIG. 2, in which a cargo box a that is short in the longitudinal direction is mounted on the rear side of the frame b from the middle thereof.

発明が解決しようとする問題点 上記従来のダンプトラックにあっては、荷箱ａの長さが
短いため、大型の積込機械で土砂等を積込む場合、積込
みにくく、荷こぼれしやすかった。また従来にあっては
荷箱ａの重量は殆ど後輪で支持されるため、積車時と空
車時における後輪に作用する荷重が大きく変り、前輪に
対する後輪の摩耗が均一でなく、積車走行の長短によっ
て前輪と後輪の寿命の差が太きいという問題があった。Problems to be Solved by the Invention In the above-mentioned conventional dump truck, since the length of the cargo box a is short, when loading earth and sand etc. with a large loading machine, it is difficult to load and the cargo is easily spilled. In addition, in the past, most of the weight of the cargo box a was supported by the rear wheels, so the load acting on the rear wheels varied greatly between when the cargo was loaded and when the cargo was empty, causing uneven wear on the rear wheels relative to the front wheels. There was a problem in that there was a large difference in the lifespan of the front and rear wheels depending on the length of the vehicle's travel.

問題点を解決するだめの平膜及び作用 本発明は上記のことにかんがみなされたもので、大型の
積込機械を用いて荷こぼれが生じることなく容易に土砂
を積込むことができ、また積車時と空車時とも荷重が前
、後輪とも平均に作用することができるようにしたダン
プトラックを提供することを目的とするもので、その構
成は、荷箱の側面形状を上辺が前後方向に長く、かつ深
さが浅い逆三角形状にすると共に、その最深部を前輪と
後輪間の略中間に位置させた構成となっており、積車時
の軸荷重は前後輪で均等化され、また大型の積込機械で
も少ない荷こぼれで積込まれる。The present invention was developed in consideration of the above-mentioned problems, and it is possible to easily load earth and sand without spilling the load using a large loading machine, and also to The purpose of this dump truck is to provide a dump truck in which the load can be applied evenly to both the front and rear wheels both when the vehicle is loaded and when the truck is empty. It has an inverted triangular shape that is long and shallow, and its deepest part is located approximately halfway between the front and rear wheels, so that the axle load when loaded is equalized between the front and rear wheels. Also, even large loading machines can be loaded with less spillage.

実　　施　　例 本発明の実施例を第１図に基づいて説明する。Example An embodiment of the present invention will be described based on FIG.

図中１はメインフレーム、２は前輪、３は後輪である。In the figure, 1 is a main frame, 2 is a front wheel, and 3 is a rear wheel.

メインフレーム１は前輪支持部より前方へ突出しており
、この前方突出部に運転室４が搭載されている。メイン
フレーム１の前輪支持部には門形フレーム５が上方へ向
けて立設されており、この門形フレーム５の内側にエン
ジン６、変速機７が搭載されている。そして左右の前輪
２は門形フレーム５の左右両側にサスペンション８を介
して支持されており、後輪３はメインフレーム１の後端
部にサスペンション９及びリンク１０を介して支持され
ている。１１は荷箱（ボディ）であり、この荷箱１１の
側面形状は背の低い逆２等辺三角形状になっており、そ
の深さに対して前後方向に長い形状となっている。そし
てこの荷箱１１の後底部はメインフレーム１の後端部に
前方へ傾動自在に支持され、前底部が上記門形７レーム
５に弾性材１２を介じて当接支持されるようになってい
る。また荷箱１１の最深部は前、後輪２．３間の一付近
に位置されている。The main frame 1 protrudes forward from the front wheel support portion, and a driver's cab 4 is mounted on this forward protrusion. A portal frame 5 is erected upward at the front wheel support portion of the main frame 1, and an engine 6 and a transmission 7 are mounted inside the portal frame 5. The left and right front wheels 2 are supported on both left and right sides of the portal frame 5 via suspensions 8, and the rear wheels 3 are supported at the rear end of the main frame 1 via suspensions 9 and links 10. Reference numeral 11 denotes a packing box (body), and the side surface of the packing box 11 is a short inverted isosceles triangle, and is elongated in the front-rear direction relative to its depth. The rear bottom of this cargo box 11 is supported by the rear end of the main frame 1 so as to be tiltable forward, and the front bottom is supported in contact with the gate-shaped seven frame 5 via the elastic material 12. ing. Further, the deepest part of the cargo box 11 is located near the area between the front and rear wheels 2.3.

上記前輪２及び後輪３はそれぞれ１駆動輪となっている
。また前、後輪２．３ともに２個ずつの単輪で、かつ大
形のタイヤが用いられている。The front wheel 2 and the rear wheel 3 are each one driving wheel. Furthermore, both the front and rear wheels 2.3 are single-wheeled, with two large tires.

上記構成において、積荷時における荷箱１１の重心は前
後輪２，３間の中間に位置され、この重量が刀０わる積
荷時の軸荷重は前後輪２．３で均等化され、荷箱１１は
深さに対して前後方向に長いことにより、大形の積込機
でも少ない荷こぼれで積込まれる。In the above configuration, the center of gravity of the loading box 11 when loaded is located midway between the front and rear wheels 2 and 3, and the axial load during loading, where the weight is significantly lower, is equalized between the front and rear wheels 2.3, and the loading box 11 Because it is long in the longitudinal direction relative to its depth, even large loading machines can load it with less spillage.

発明の効果 本発明によれば、荷箱１１は前後方向に長いことにより
、大型の積込機械を用いて荷とぼれが生じることなく容
易に土砂を積込むことができる。また積車時と空車時と
も荷重は前輪２と後輪３に平均して作用することにより
、横車走行時における前、後輪２，３の荷Ｎは略均−と
なり、積車走行の長い場合における前、後Ｍ２．　　−
３の寿命を略均−にすることができる。Effects of the Invention According to the present invention, since the cargo box 11 is long in the front-rear direction, earth and sand can be easily loaded using a large-sized loading machine without causing the cargo to fall off. In addition, since the load acts on the front wheels 2 and rear wheels 3 on the average when the vehicle is loaded and when the vehicle is empty, the load N on the front and rear wheels 2 and 3 is approximately equal when the vehicle is traveling sideways, so that when the vehicle is traveling sideways, the load N is approximately equal to Front and rear M2 in long cases. −
3 can be made approximately equal in life.

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

第１図は本発明の実施例を示す側面崗、第２図は従来例
を示す側面１図である。 ２は前輪、３は後輪、１１は荷箱。FIG. 1 is a side view showing an embodiment of the present invention, and FIG. 2 is a side view showing a conventional example. 2 is the front wheel, 3 is the rear wheel, and 11 is the cargo box.

Claims (1)

【特許請求の範囲】[Claims] オフロードを走行する大型のダンプトラックにおいて、
荷箱１１の側面形状を上辺が前後方向に長く、かつ深さ
が浅い逆三角形状にすると共に、その最深部を前輪２と
後輪３間の略中間に位置させたことを特徴とするダンプ
トラック。In large dump trucks traveling off-road,
A dump truck characterized in that the side surface of the cargo box 11 is shaped like an inverted triangle whose upper side is long in the front-rear direction and whose depth is shallow, and the deepest part is located approximately midway between the front wheels 2 and the rear wheels 3. truck.