JP2007223507A - Vessel structure of articulate dump truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vessel structure capable of ensuring a space between a front vehicle body part and a vessel in the bending steering, and preventing the capacity of the vessel from being substantially reduced without changing the dimension between a connection device and a vessel rear end in an articulate dump truck in which the front vehicle body part and a rear vehicle body part are connected to each other by the connection device and steered in a bendable manner. <P>SOLUTION: The vessel (10) has a structure comprising at least a bottom plate (20a), a pair of right and left side plates (20c, 20c), and a front plate (22a). The capacity of the vessel which is reduced by providing chamfered plates (22b, 22c) for forming a chamfered shape on each joined portion of the front plate (22a) with the pair of side plates (20c, 20c) is complemented by offsetting the front plate in the direction of a connection device without changing the dimension between the connection device and the vessel rear end. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a vessel structure of an articulated dump truck.

In a tunnel excavation work site or the like, there is an articulated dump truck known as a work vehicle that loads and conveys earth and sand on a vessel (see, for example, Patent Document 1). This dump truck has a small turning characteristic that enables turning with a small radius by connecting the front car body part equipped with the driver's seat and the rear car body part equipped with the vessel so that they can be bent around the vertical axis. is doing.

The articulated dump truck is suitable for sites such as tunnel construction, and it runs at a relatively high speed from the tunnel entrance to the face of the face and excavates a large-capacity vessel using a loader such as a wheel loader. Loading and changing the direction of travel in a narrow tunnel utilizing the small turning characteristics, and traveling toward the tunnel exit.
Japanese Patent Laid-Open No. 2001-039358 (FIGS. 1 and 3)

However, the conventional articulated dump truck of the form as described above has the following problems to be solved.

The vessel of the articulated dump truck is formed in a box-shaped rectangular parallelepiped structure, and a space is provided between the vessel and the front vehicle body so as not to interfere with each other during refraction steering (for example, Patent Document 1). .

On the other hand, in a narrow field such as in a tunnel, it is desired that the total length of the vehicle, that is, the length of the connected front vehicle body portion and rear vehicle body portion be as short as possible in order to make use of the small turning characteristics. However, if the overall length of the vehicle is shortened, the length of the vessel is reduced accordingly, the volume is reduced, and the amount of earth and sand that can be loaded and transported at one time is reduced.

The present invention has been made in view of the above-mentioned facts, and its technical problem is that an articulated dump truck in which a front vehicle body portion and a rear vehicle body portion having a vessel are connected by a connecting device and steered freely is connected. To provide a vessel structure that does not change the dimensions between the apparatus and the rear end of the vessel, ensures a space between the front vehicle body and the vessel during refraction steering, and does not substantially reduce the vessel capacity. It is.

According to the present invention, in order to solve the above technical problem, the front vehicle body portion is provided with a driver's seat, the rear vehicle body portion is provided with a vessel, the front vehicle body portion and the rear vehicle body portion are connected by a connecting device, In a vessel structure of an articulated dump truck that is steered around a vertical axis of a coupling device, the structure includes at least a bottom plate, a pair of left and right side plates, and a front plate, and includes a front plate and a pair of side plates. The vessel volume, which is reduced by providing a chamfered plate that forms a chamfered shape at each joint, is offset in the direction of the connecting device without changing the dimension between the connecting device and the rear end of the vessel. Thus, a vessel structure characterized in that the volume of the vessel is complemented is provided.

Preferably, there is a swash plate that is inclined from the lower end of each side plate to the inside of the vessel between the bottom plate and the pair of side plates, and the side plate and the bottom plate are joined, and the lower end of the front plate is Inclined toward the rear of the vehicle and joined to the bottom plate.

The chamfered plate has left and right ends joined to the front plate, a lower end joined to the swash plate and the bottom plate, and a lower end of the chamfered plate forming the swash plate is inclined toward the center of the vessel. ing.

The vessel structure of the articulated dump truck constructed according to the present invention is a structure including at least a bottom plate, a pair of left and right side plates, and a front plate, and has a chamfered shape at each joint portion between the front plate and the pair of side plates. By providing the chamfering plate to be formed, the space during refraction steering between the vessel and the front body part is secured in a chamfered shape, and the volume of the vessel to be reduced is determined by the dimension between the connecting device and the rear end of the vessel. The volume of the vessel is complemented by offsetting the front plate in the direction of the coupling device without change.

That is, by connecting the front part of the vessel with the front body part at the time of refraction steering and the central part with little space change to the front body part side and forming the chamfered shape on the left and right parts approaching at the time of refraction steering, It is possible to provide a vessel structure that does not change the dimension between the rear end portions of the vessel, secures a space between the front vehicle body portion and the vessel at the time of refractive steering, and does not substantially reduce the capacity of the vessel. .

Hereinafter, the vessel structure of an articulated dump truck constructed according to the present invention will be described in more detail with reference to the accompanying drawings illustrating preferred embodiments.

With reference to FIG. 3, an articulated dump truck having a vessel constructed according to the present invention will be described.

The articulated dump truck 2 includes a front vehicle body portion 8 equipped with a driver's seat 4 and front wheels 6, and a rear vehicle body portion 14 equipped with a vessel 10 and biaxial rear wheels 12 and 12. The front vehicle body portion 8 and the rear vehicle body portion 14 are connected by a connecting device 15, are connected to bendable about a vertical axis Z of the connecting device 15, and are relatively refracted and steered by the steering cylinder 16. The vessel 10 is freely dumped backward by a dump cylinder 18.

In the description, “front-rear direction”, “left-right direction”, and “up-down direction” mean the front-rear, left-right, and up-down directions of the articulated dump truck 2. Therefore, “front” means the left in FIGS. 3A and 3B, for example.

The vessel 10 will be described with reference to the side view and plan view shown in FIG. 1 and the front view shown in FIG. The vessel 10 includes a main body portion 20 having a concave cross section that opens upward and extends in the front-rear direction, and a front portion 22 that closes the front end of the main body portion 20.

The main body 20 has a rectangular bottom plate 20a extending in the front-rear direction, a pair of swash plates 20b, 20b extending from both sides in the left-right width direction of the bottom plate 20a upward in the left-right width direction, and upper ends of the swash plates 20b, 20b. A pair of side plates 20c, 20c extending vertically upward from the top.

The front portion 22 has a front plate 22a that has substantially the same width from the front end of the bottom plate 20a and extends forward and upward, and extends from the both sides of the front plate 22a in the left-right width direction toward the rear in the left-right width direction, A pair of left and right chamfered plates 22b and 22c are formed by joining the extended ends to the swash plates 20b and 20b and the side plates 20c and 20c to form a chamfered shape. The chamfered plates 22 b and 22 c are formed symmetrically in the left-right width direction of the vessel 10.

The front plate 22a and the chamfered plates 22b and 22c may be formed by bending a single plate.

The front plate 22a and the chamfered plates 22b and 22c extend above the upper ends of the side plates 20c and 20c of the main body 20, and a substantially trapezoidal top plate 22d extending horizontally is joined to the tip. Between the front end portions of the side plates 20c and 20c, the pair of chamfered plates 22b and 22c, and the top plate 22d, a pair of front side plates 22e and 22e joined to each other is provided.

An upper and lower reinforcing plate 22f having a cross-sectional channel shape extending in the vertical direction is joined to the front surface of the front plate 22a. The left and right reinforcing plates 22g extending horizontally are joined to the upper and lower reinforcing plates 22f, the front plate 22a, the chamfered plates 22b and 22c, and the side plates 20c and 20c on the left and right sides, respectively. Three and 22h are provided on the right side.

A pair of left and right dump brackets 24, 24 are provided at the lower rear end of the vessel 10 so that the vessel 10 can be rotated and dumped to the rear vehicle body 14 (FIG. 3). A pair of left and right cylinder brackets 26 and 26 for attaching one end of a dump cylinder 18 for dumping the vessel 10 and a rod end are provided on the left and right of the lower portion on the front end side of the vessel 10.

With reference to FIG. 3 together with FIG. 1 and FIG. 2, the effect of the vessel structure of the articulated dump truck as described above will be described.

The vessel 10 has a structure including at least a bottom plate 20a, a pair of left and right side plates 20c and 20c, and a front plate 22a, and is chamfered to form a chamfered shape at each joint between the front plate 22a and the pair of side plates 20c and 20c. By providing the plates 22b and 22c, a space for refraction steering between the vessel 10 and the front vehicle body portion 8 is secured, and the vessel volume that the vessel 10 decreases is reduced between the connecting device 15 and the rear end of the vessel. The volume of the vessel 10 is supplemented by offsetting the front plate 22a in the direction of the connecting device 15 without changing the dimension L.

That is, the central portion of the front portion 22 of the vessel 10 with little change in space with the front vehicle body portion 8 during refraction steering is brought closer to the front vehicle body portion 8 side, and is approached during refraction steering (indicated by a dotted line in FIG. 3B). (Shown) By forming chamfered shapes on the left and right parts, the dimension L between the connecting device 15 and the rear end of the vessel 10 is not changed, and a space between the front vehicle body 8 and the vessel 10 during refraction steering is secured. In addition, it is possible to provide a vessel structure that does not substantially reduce the capacity of the vessel 10.

Further, the front surface of the vessel 10 is stronger in strength because it is formed in a bent structure by the front plate 22a and the chamfered plates 22b and 22c as compared to the flat plate structure of a conventional box-shaped rectangular parallelepiped vessel.

In this embodiment, the swash plates 20b and 20b are provided between the pair of side plates 20c and 20c and the bottom plate 20a, respectively. However, the swash plates 20b and 20b are not provided, and the pair of side plates 20c and 20c are provided. The bottom plate 20a may be directly joined.

(A) of the vessel which shows the vessel structure comprised according to this invention is a side view, (b) is the plane sectional view seen in the AA arrow direction of (a). The front view seen in the BB arrow direction of FIG. FIG. 3A is a side view and FIG. 3B is a plan view of an articulated dump truck having the vessel structure shown in FIGS. 1 and 2.

Explanation of symbols

2: Articulated dump truck 4: Driver's seat 8: Front car body part 10: Vessel 14: Rear car body part 15: Connecting device 20: Main body part 20a: Bottom plate 20b: Swash plate 20c: Side plate 22: Front part 22a: Front plate 22b 22c: Chamfer plate Z: Vertical axis

Claims (3)

An artisan that has a driver's seat in the front body part, a vessel in the rear body part, the front body part and the rear body part are connected by a connecting device, and is steered freely around the vertical axis of the connecting device. In the vessel structure of curated dump truck,
At least a bottom plate, a pair of left and right side plates, a structure including a front plate,
The vessel volume that decreases by providing a chamfered plate that forms a chamfered shape at each joint between the front plate and the pair of side plates,
A vessel structure in which the volume of the vessel is complemented by offsetting the front plate in the direction of the connecting device without changing the dimension between the connecting device and the rear end of the vessel. Between the bottom plate and the pair of side plates, each side plate is inclined from the lower end of the side plate toward the inside of the vessel, and has a swash plate that joins each side plate and the bottom plate,
2. A vessel structure according to claim 1, wherein a lower end portion of the front plate is inclined toward the rear of the vehicle and joined to the bottom plate. The chamfered plate has left and right ends joined to the front plate, a lower end joined to the swash plate and the bottom plate, and a lower end of the chamfered plate forming the swash plate is inclined toward the center of the vessel. The vessel structure according to claim 2, wherein:

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