JP2622247C - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a full swing in which a traveling body is equipped with a swivel that can freely swing around a vertical axis, and an excavating work device is connected to the swivel. Type work vehicle. 2. Description of the Related Art In an all-turn type working vehicle as described above, for example, as shown in FIG. 4, an operating unit 10 and a driving unit 9 are arranged on a swivel base 2 and a bonnet 13 covering the driving unit 9 is attached. Some have. In particular, in a small all-turn type work vehicle in which the size of the turntable 2 is limited, for example, as shown in FIG. 4, the driving seat 12 of the driving unit 10 is installed on the ceiling portion of the bonnet 13 and the driving unit 10 ( In some cases, the driver's seat 12) and the prime mover 9 (bonnet 13) are stacked one on top of the other to secure a space for each other. [0003] Since the driving portion includes a relatively tall one such as an engine or a radiator, the height of the bonnet needs to be set to a certain height. is there.
On the other hand, since the driver seats the driver's seat, the height of the driver's seat cannot be set to be too high from the viewpoint of maneuverability. The present invention relates to an all-turn work vehicle in which a driving seat is installed on a ceiling portion of a hood covering a driving part as described above, and while setting the height of the driving seat to an appropriate height, the height of the hood is increased to some extent. The purpose is to obtain a configuration that can be realized. [0004] A feature of the present invention is that the all-turn type working vehicle is configured as follows. The traveling body is equipped with a swivel that can be swiveled all around the vertical axis.The swivel is equipped with an excavation work device. The ceiling portion is formed at the front portion of the hood, the vertical wall portion is formed over the low ceiling portion and the ceiling portion, and the driver's seat has its backrest opposed to the vertical wall portion and is shifted rearward. luck
The position can be freely changed between the rolling action position and the maintenance work position that has been slid forward.
To be installed in the low ceiling portion, and in a portion between the rear end portion of the hood and the vertical wall portion in the ceiling portion of the hood.
A lateral fulcrum is provided, and an opening / closing portion capable of opening the inside of the hood is swingably supported around the fulcrum. According to the first aspect of the present invention, when a low ceiling portion lower than the ceiling portion of the bonnet is formed and the driver's seat is installed in the low ceiling portion, the height of the driver's seat (low ceiling portion) is increased. Even if the height is set to an appropriate height, the ceiling portion of the hood can be set high. The vertical wall portion of the bonnet is on the backrest side (rear side) of the driver seat, and the bonnet ceiling portion is formed from the vertical wall portion. Therefore, the hood ceiling is also provided on the driver seat backrest side (rear side). The part will be high. In this case, the height from the floor surface to the driver's seat can be set to an appropriate height, so that the driver can place his or her feet freely at a desired position on the floor surface while sitting on the driver's seat. Become like Thus, by moving the foot to an appropriate position on the floor according to the change in the work state, the driver can easily stabilize his or her own body by stepping on the foot regardless of the change in the work state. According to the first aspect of the present invention, the opening and closing portion is swingably opened and closed around a fulcrum of the ceiling portion higher than the low ceiling portion on the bonnet, and the driver's seat is moved forward to perform maintenance work. The position can be changed. Thus, for example, if the opening / closing portion is formed to be large so as to extend from the ceiling portion of the hood to the rear wall portion or the side wall portion, the opening operation can be largely performed without interfering with the driver's seat, and the rear wall portion or the side wall of the hood can be opened. Part can be opened over a high range,
Not only this, but also the ceiling part can be opened by the opening and closing part. According to the first aspect of the present invention, the driver's seat can be set at an appropriate height, and at the same time, the ceiling portion of the hood can be set at a high height. It is possible to easily stabilize the driver's own body by stepping on the foot without causing the adverse effect of badness, and to place a relatively tall object such as an engine or a radiator in the hood without difficulty. As a result, a highly flexible configuration can be obtained with respect to the arrangement of each part in the hood. In this case, the low ceiling portion of the bonnet located below the driver's seat is also provided with a space inside the bonnet, so that the volume of the bonnet can be increased also in this point, and each part of the bonnet can be provided. A more flexible configuration with respect to the arrangement is obtained. [0009] Since the ceiling portion of the bonnet can be set high also on the backrest side (rear side) of the driver's seat, a tall object can be disposed also in this portion, and further arrangement of each part in the hood is further improved. The configuration is highly flexible. The opening / closing portion can be set so that the rear wall portion, the side wall portion, and the ceiling portion of the hood can be largely opened, so that improvement in maintainability of a driving portion in the hood can be expected. FIG. 3 shows a full-turn type backhoe as an example of a full-turn type work vehicle according to the present invention. This backhoe is configured by mounting a swivel 2 that can be swiveled all around a vertical axis Y1 on an upper portion of a crawler-type traveling body 1 of a hydraulic motor drive type, and connecting an excavation work device 3 to the swivel 2. ing. As shown in FIGS. 3 and 1, the excavating work apparatus 3 includes a boom 5 pivotally connected to a swivel base 2 around a horizontal axis X 1 via a bracket 4, and a distal end side of the boom 5. Bent arm 6 pivotally connected to be able to bend freely around the vertical axis Y2, arm 7 pivotally connected about the horizontal axis X2 at the distal end of the bent joint 6, and arm 7
Of the hydraulic cylinder C1,
Excavation work can be performed by swinging drive by C2, C3, and C4 respectively. As shown in FIG. 2, the boom 5 is held in a state where the bent connecting portion 6 is bent.
Is swung rearward, the entire excavation work device 3 fits within the maximum turning locus of the swivel base 2 in plan view, and the turning radius can be reduced. As shown in FIGS. 3 and 1, the driving unit 9, the driving unit 10, the fuel tank 11, and the like are arranged on the swivel 2 so as to be within the maximum swirl locus of the swivel 2. The driving unit 10 and the fuel tank 1 are provided on both sides of the center line l along the connecting direction of the excavating work device 3.
1 are arranged side by side, and a prime mover 9 is arranged at a portion on the opposite side of the connecting portion of the excavating work device 3. A fixed bonnet 13 (corresponding to a bonnet) that covers the driving unit 9 is provided,
The fixed bonnet 13 and a ceiling portion 13a of a movable bonnet 15 (corresponding to an opening / closing portion) to be described later, and a low ceiling portion 13b lower than the ceiling portion 15a are formed at the front portion of the fixed bonnet 13, and are formed at the low ceiling portion 13b and the ceiling portion 13a. A vertical wall portion 13c is formed over the entire surface. As shown in FIG. 3, the driving seat 12 of the driving unit 10 is mounted on the low ceiling portion 13 b of the fixed bonnet 13 via the slide mechanism 14,
The backrest portion is opposed to the vertical wall portion 13c, and is configured to be freely changeable between a driving operation position in which the driver seat 12 is shifted rearward and a maintenance operation position in which the driver seat 12 slides forward. A movable bonnet 15 on the rear side of the fixed bonnet 13 is attached to the upper rear side around a horizontal axis X3 (corresponding to a fulcrum) provided on the ceiling portion 13a of the fixed bonnet 13 so as to be able to swing greatly open. The movable bonnet 15 is the gas cylinder 1
6 allows the position to be held in the open position. In this case, by changing the position of the driver seat 12 to the maintenance work position on the front side, the movable hood 15 can be largely opened without interfering with the driver seat 12. The driving seat 12
May be attached so as to be swingable upward around the horizontal axis at the lower part of the front part. A portion 17a of the operation portion 10 on the center line 1 side of the operation step portion 17 protrudes outward from the fuel tank 11 in the turning radial direction, and the operation pedals 18, 19 are arranged on the protruded portion 17a. doing. One of the operation pedals 18 is for switching between a state in which the swivel base 2 is driven to rotate and a state in which the bending connection unit 6 of the excavation work device 3 is driven to retract and swing, and the other operation pedal 19 is operated. The traveling speed of the body is switched between high and low by a displacement switching operation of a traveling hydraulic motor (not shown). As described above, by protruding the portion 17 a of the driving step portion 17, the driver's seat 1 is placed in a position where the driver is not obstructed from the front view by the fuel tank 11.
2 could be placed. In addition, the movable bonnet 15 of the driving unit 9 can swing and open greatly without interference with the driver's seat 12. In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Brief description of the drawings]     FIG.   Top view near the swivel     FIG. 2   Overall plan view showing the stored state of the excavation work device     FIG. 3   Backhoe whole side view     FIG. 4   Plan view near a swivel table showing a conventional example     [Explanation of symbols]   1 traveling aircraft   2 swivel   3 Excavation work equipment   9 Drive unit   12 Driver's seat   13 Bonnet   13a Bonnet ceiling   13b Low ceiling of bonnet   13c Vertical wall of bonnet   15 Bonnet opening / closing part   X3 fulcrum   Y1 vertical axis

Claims (1)

Claims: 1. A traveling platform (1) is provided with a swivel (3) that can be swiveled all around a vertical axis (Y1).
2), the swivel (2) is provided with an excavating work device (3), and the swivel (
2) a bonnet (13) covering a rear driving unit (9), and a low ceiling portion (13b) lower than a ceiling portion (13a) of the bonnet (13);
) Is formed at the front of the hood (13), and a vertical wall portion (13c) is formed over the low ceiling portion (13b) and the ceiling portion (13a) . The backrest portion faces the vertical wall portion (13c),
Operation position shifted to the rear and maintenance work position slid forward
The hood ( 13b) at the ceiling portion (13a) of the hood (13 ) is installed at the low ceiling portion (13b).
), A horizontal fulcrum (X3) is provided at a portion between the rear end portion and the vertical wall portion (13c).
An all-turn type work vehicle provided with an opening / closing portion (15) capable of opening and closing the hood (13) around the fulcrum (X3) so as to be swingably openable and closable.