JPH0376935A - Earth-moving machine bendable in the middle of body - Google Patents

Abstract

PURPOSE:To make compact structure available for a machine by providing an upper frame equipped with front wheels and a lower frame equipped with rear wheels and by connecting the lower frame to the upper frame at point in the middle of the upper frame so that the frames become capable of making relative rocking motion around the vertical axis. CONSTITUTION:An upper frame 2 equipped with front wheels and a lower frame 4 equipped with rear wheels are connected so that both the upper and the lower frames become capable of making relative rocking motion around the vertical axis Y. On the front part of the front frame 2, an hydraulic loader 5 is installed and, at the same time, an operating device 6 and an engine 7 are installed respectively over the axis Y and to the rear part thereof. Then the frame 4 is made a fuel oil tank 8, and a hydraulic cylinder 9 is installed extending over the frames 2 and 4, and by operation thereof, the frames can make rightward and leftward rocking movement around the axis Y. Furthermore a travel motor 16 is driven through a hydraulic pump 18, making the wheels travel. Thereby compact design can be feasible for lengthwise structure of a machine with a spacious operator's seat secured, utilizing a space over a bent part of the machine.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a machine in which a working device such as a hydraulic loader device or a hydraulic excavator is attached to the front part of a machine body, and the machine body can bend around a vertical axis. Concerning the constructed earthmoving machine.

[Conventional technology]

Conventionally, the above-mentioned bent-body type earthmoving machine
As shown in Publication No. 21, the vehicle body frame is divided into two in the front and rear direction, the front frame with the front wheels is equipped with a working device, and the rear frame with the rear wheels is equipped with a control section, an engine, and a fuel tank. , the rear end of the front frame and the front end of the rear frame are connected to each other so as to be relatively swingable around a vertical axis.

[Problem to be solved by the invention]

In this way, in a structure in which the fuselage is divided into two in the longitudinal direction and the rear end of the front frame and the front end of the rear frame are pivotally connected to each other so as to be relatively swingable about the vertical axis, the pivot joint This required a rotating space above the fuselage for bending the fuselage, a so-called dead space, making it impossible to make the aircraft more compact in the longitudinal direction, resulting in a narrow space for maneuvering.

Therefore, as shown in Figure 4, the control section (
It is conceivable to install C) and use the dead space above the pivot joint (P) as a space for maneuvering, thereby increasing the space for maneuvering and making the aircraft more compact in the longitudinal direction.
In such a case, the conventional rotation space, that is,
Even if one horizontal end of the front fuselage and one horizontal end of the rear fuselage approach each other due to the fuselage bending, it is possible to move around the vertical axis of the pivot joint, even if it does not require a large space to allow rotation. Space is required to avoid interference between the control section, which rotates in a circular arc, and the engine, and there is also the disadvantage that it is not possible to make the aircraft more compact in the longitudinal direction.

An object of the present invention is to make the fuselage more compact in the longitudinal direction while increasing the space for maneuvering by devising the bending structure of the front fuselage and the rear fuselage.

[Means to solve the problem]

The characteristic configuration of the present invention for achieving the above object is that the fuselage frame is vertically divided into two parts: an upper frame with a front wheel and a lower frame with a rear wheel; A working device is provided in the front, a control section is provided in the middle, and an engine is provided in the rear, and a fuel tank is provided in the lower frame, and the lower frame is arranged with a vertical axis relative to the upper frame below the control section. They are connected to each other so that they can swing relative to each other around the core, and their functions and effects are as follows.

[For production]

The fuselage frame is divided into two in the vertical direction, and the control section and engine are placed in the upper frame, which is equipped with the front wheels and working equipment, so the dead space above the rotation axis for fuselage bending is used as the space for control. Furthermore, since the control section and the engine do not rotate relative to each other, they can be placed close to each other without leaving any space between them.

〔Effect of the invention〕

As a result of the above configuration, the dead space above the axis of rotation of the fuselage bending can be utilized as a space for maneuvering, thereby making it possible to make the fuselage compact in the longitudinal direction while increasing the space for maneuvering.

〔Example〕

As shown in Fig. 1, an upper frame (2) equipped with a pair of left and right front wheels (1) and a lower frame (4) equipped with a pair of left and right rear wheels (3) are arranged around a vertical axis (Y). A hydraulic loader device (5) is connected to the upper frame (2) so as to be relatively swingable, and is equipped with a hydraulic loader device (5) as a working device that can be freely raised and lowered in the front part of the upper frame (2), and a control section ( 6), an engine (7) is installed behind the control section (6), and
forming a lower frame (4) from a fuel tank (8);
The steering handle (10) is operated by a hydraulic cylinder (9) installed across both aircraft frames (2) and (4,).
Both aircraft frames (2), (4) are moved by an amount corresponding to the amount of operation.
A folding-body type wheel loader is constructed, in which the body is steered by relatively swinging around the vertical axis (Y).

As shown in FIG. 2, the inside of the fuel tank (8>) is partitioned by a partition wall (11), with one side serving as the fuel tank (8) and the other side serving as a hydraulic oil tank for the loader device driving cylinder (12). (13), and a hitch boss (14) connected to the front surface of the fuel tank is fitted onto the cylinder shaft (15) on the upper frame (2) side so as to be relatively rotatable.

The front wheel (1) and the rear wheel (3) are driven by a travel motor (16).
The traveling motor (16) is configured to be driven via a hydraulic pump (18) mounted on a transmission case (17) connected to the engine (7).

In the above embodiment, the lower frame is formed by the fuel tank, but the lower frame may be formed from a rectangular frame in plan view, and the fuel tank may be disposed within the frame.

Further, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings by the reference numerals.

[Brief explanation of drawings]

The drawings show an embodiment of the foldable body earthmoving machine according to the present invention, in which Fig. 1 is a side view showing the entire wheel loader, Fig. 2 is a perspective view showing a part of the lower body frame, and Fig. 3 is the upper frame. FIG. 4 is a side view showing a comparative example. FIG. 4 is a side view showing a comparative example. (1)...Front wheel, (2)...Upper frame, (3)...Rear wheel, (4)...Lower frame, (5) ...... Working equipment, (6)...
...Controller, (7) ...Engine, (8>
...Fuel tank, (Y) ...Vertical axis center.

Claims (1)

[Claims] The fuselage frame is assembled into an upper frame (2) with a nose wheel (1).
) and a lower frame (4) equipped with a rear wheel (3). Control section (6),
An engine (7) is installed at the rear, a fuel tank (8) is installed at the lower frame (4), and the lower frame (4) is connected to the upper frame (4) at the bottom of the control section (6). 2) A folding-body earthmoving machine that is connected so as to be able to swing freely around the vertical axis (Y).