JP4097058B2 - Slope working vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crawler-type sloping ground working vehicle in which an upper-part turning body mounted on a lower traveling body can be tilted back and forth and left and right.
[0002]
[Prior art]
Conventionally, when working on a steep slope with a crawler-type sloping ground working vehicle having an upper revolving structure, the upper revolving structure is tilted back and forth and left and right in consideration of the driver's safety and workability, and is kept almost horizontal. It is used. One example is disclosed in Utility Model Registration No. 2552994.
[0003]
FIG. 7 is a side view showing a configuration of a horizontal control device for a construction machine for working on an inclined land disclosed in Japanese Utility Model Registration No. 2552994, and FIG. 8 is a rear view. 7 and 8, an upper attitude control stand 50 is attached to the lower surface of the upper swing body 2 via a swing bearing 3. The upper attitude control table 50 is attached to the lower attitude control table 52 so as to be swingable in the front-rear direction by a pin 51 at the center in the front-rear direction.
On the other hand, on the upper surface of the support base 61 fixed to the upper surface of the car body 60 of the lower traveling body 10, a lower posture control base 52 is attached to a central portion in the left-right direction by a pin 53 so as to be swingable in the left-right direction. .
The front and rear end portions of the upper attitude control table 50 and the support table 61 are connected by a pair of first hydraulic cylinders 54, 54, and the left and right ends of the lower attitude control table 52 and the car body 60 are a pair of second hydraulic cylinders. 62 and 62 are connected.
A crawler belt 14 is attached to the lower traveling body 10.
In the above configuration, when one of the first hydraulic cylinders 54, 54 is extended and the other is reduced, the upper swing body 2 tilts in the front-rear direction, and when one of the second hydraulic cylinders 62, 62 is extended and the other is reduced, the upper part The swivel body 2 is inclined in the left-right direction.
[0004]
[Problems to be solved by the invention]
However, the above configuration has the following problems.
In the above example, the turning center of the upper turning body is not particularly described. However, in a normal construction machine for working on an inclined ground, as shown in FIG. This corresponds to the center line AA of the contact length of the crawler belt 14. In this case, as shown in FIG. 9, when working on a steep slope with an upward angle α (for example, 20 °) and the upper swing body 2 is leveled, the perpendicular line DD drawn from the center of gravity G is the ground contact of the crawler belt 14. The long center point E is shifted backward by F. Therefore, the contact pressure distribution b of the crawler belt 14 is biased backward as shown in the figure, and the front and rear stability is poor, which may cause danger.
As described with reference to FIGS. 7 and 8, in this example, four hydraulic cylinders are used, and the structure is complicated and the cost is high.
As shown in FIG. 7, the first hydraulic cylinders 54, 54 are vertically mounted. Therefore, if the necessary stroke is ensured, the overall length becomes longer, and accordingly, the ground level H2 of the upper revolving structure increases. Therefore, the overall height of the vehicle is increased and the stability is deteriorated.
[0005]
The present invention has been made paying attention to the above-mentioned problems, and when working on an uphill slope, the crawler belt contact pressure distribution is not extremely biased, the structure is simple, and the vehicle height is lowered and stable. The purpose is to provide a work vehicle with good slope.
[0006]
[Means, actions and effects for solving the problems]
In order to achieve the above object, a first invention of an inclined ground working vehicle according to the present invention includes an upper turning body mounted on a crawler-type lower traveling body, and the upper turning body is inclined in the front-rear and left-right directions when working on an inclined ground. In an inclined terrain vehicle equipped with a horizontal link device that is leveled, the horizontal link device that tilts the upper swing body in the front-rear and left-right directions is forward of the turning center of the upper swing body of the frame constituting the lower traveling body, A first link shaft provided horizontally in the left-right direction, a first plate having one end pivotably attached to the first link shaft and extending the other end rearward, and left and right on the first plate A second link shaft horizontally attached in the front-rear direction at the center of the direction, and a second plate on which the center portion in the left-right direction is swingably attached to the second link shaft and mounted with the upper swing body , Left and right ends of the rear end of the second plate and the front It has a configuration having a pair of hydraulic cylinders coupled between the frame.
[0007]
According to the first invention, by simultaneously expanding and contracting the pair of hydraulic cylinders by the same amount, the first plate swings in the front-rear direction around the first link shaft, and tilts the upper swing body in the front-rear direction. By changing the length of the pair of hydraulic cylinders, the second plate is tilted left and right, and the upper swing body is tilted left and right. Therefore, two hydraulic cylinders are used, and the structure is simple and the cost is low. In addition, since the first link shaft is positioned in front of the turning center of the upper swing body, when working on a front rising slope, if the hydraulic cylinder is extended and the upper swing body is tilted to be horizontal, the upper swing body The position of the center of gravity of the body moves forward, leveling the contact pressure distribution, and improving the stability in the front-rear direction. Therefore, the stability of the vehicle can be kept good, safe and easy to work.
[0012]
The second invention is based on the configuration of the first invention, wherein the hydraulic cylinder has one end pivotally mounted in the vicinity of the first link shaft provided on the frame, and the other end on the rear end of the second plate. It is pivotally attached and is configured to be inclined in the front-rear direction.
[0013]
According to the second aspect of the present invention, the hydraulic cylinder is disposed so as to be inclined in the front-rear direction, so that the dimension in the direction perpendicular to the required stroke can be reduced. Therefore, the overall height of the vehicle can be made low and compact, and the stability is also good.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Embodiments of an inclined terrain vehicle according to the present invention will be described below in detail with reference to the drawings.
[0015]
FIG. 1 is a partial cross-sectional side view showing an example of an inclined work vehicle 1. A swing bearing 3 is attached to the lower surface of the upper swing body 2. An cab 4 and a work machine 5 are mounted on the upper swing body 2. A guide wheel 12 is provided in front of the lower traveling body 10, and an activation wheel 13 is disposed in the rear. A crawler belt 14 is wound around the guide wheel 12 and the starting wheel 13. A horizontal link device 20 is provided on the upper surface of the frame 11 constituting the lower traveling body 10, and the upper swing body 2 is rotatably mounted on the horizontal link device 20 via a swing bearing 3. The turning center line BB of the upper swing body 2 is located forward of the center line A-A of the contact length L of the crawler belt 14 by C, that is, on the guide wheel 12 side in this embodiment. The value of C is 3% to 10% of the contact length L of the crawler belt 14. The blade 6 is swingably attached to the starting wheel 13 side of the lower traveling body 10.
[0016]
2 is a side sectional view of the horizontal link device 20, and FIG. 3 is a view taken in the direction of the arrow X in FIG. 2 and 3, a first link shaft 21 is provided horizontally in the left-right direction in front of the turning center BB of the upper turning body 2 of the frame 11. A first plate 22 extending rearward is attached to the first link shaft 21 so as to be swingable in the front-rear direction. A pair of brackets 23, 23 are provided at the front and rear end portions of the central portion in the left-right direction on the first plate 22. The left and right center portions of the second plate are attached to the brackets 23 and 23 by second link shafts 24 and 24 so as to be swingable in the left and right directions. One end of a pair of left and right hydraulic cylinders 26 and 26 is pivotally attached to the first bracket 11a fixed in the vicinity of the first link shaft 21 of the frame 11 by pins 27 and 27, respectively. The other ends of the hydraulic cylinders 26 and 26 are pivotally attached to the second bracket 25a fixed to the left and right ends of the end by pins 28 and 28, respectively. Therefore, the hydraulic cylinders 26 and 26 are attached to be inclined in the front-rear direction. Accordingly, the vertical dimension of the hydraulic cylinder 26 can be reduced, the ground height H1 of the lower surface of the upper swing body 2 shown in FIG. 1 can be made lower than the conventional height H2, and the overall height of the vehicle is lowered to improve the stability. .
[0017]
Next, the operation will be described. When the pair of left and right hydraulic cylinders 26 and 26 are expanded and contracted by the same amount on the left and right at the same time, the first plate 22 and the second plate 25 swing back and forth about the first link shaft 21, and accordingly, the upper swing body 2 Swings back and forth. When one of the left and right hydraulic cylinders 26, 26 is extended and the other is reduced by the same amount, the second plate 25 swings left and right about the second link shaft 24, and therefore the upper swing body 2 is left and right at that height. Rocks. When the left and right hydraulic cylinders 26 and 26 are extended and their lengths are changed, the first plate 22 swings back and forth about the first link shaft 21 and the second plate 25 centers on the second link shaft 24. Swings left and right. Accordingly, the upper swing body 2 swings left and right while swinging back and forth.
[0018]
FIG. 4 shows a state in which the left and right hydraulic cylinders 26 and 26 are simultaneously extended by the same amount and the upper-part turning body 2 is substantially horizontal on a front rising slope with an angle α (for example, 20 °). At this time, as described above, the turning center position BB of the upper swing body 2 is positioned in front of the center line AA of the contact length of the crawler belt 14 on a flat ground, and the first link shaft 21 is positioned on the upper swing body 2. Since it is located in front of the turning center line BB, the perpendicular line DD passing through the center of gravity G passes near the center point E of the contact length. Therefore, the ground pressure distribution a is leveled, and the stability in the front-rear direction is good. At this time, the front and rear stability can be further improved by grounding the blade 6.
[0019]
FIG. 5 is a front view of the inclined work vehicle 1 and shows a state in a horizontally inclined place with an angle β. In this case, as described above, the lengths of the left and right hydraulic cylinders 26 are changed to incline the second plate 25 to the left and right, so that the upper swing body 2 is leveled.
[0020]
In the above-described embodiment, the turning center line BB of the upper turning body 2 is eccentrically positioned on the guide wheel 12 side with respect to the center line AA of the contact length L of the crawler belt 14, but the horizontal link of the present invention. As shown in FIG. 6 which is a partial cross-sectional side view of another embodiment of an inclined ground working vehicle having a device, the working vehicle may be positioned eccentric to the starter wheel 13 side. Further, the blade 6 may not be provided. When there is no blade, the turning center line BB of the upper turning body 2 is decentered above the center line AA of the contact length L of the crawler belt 14 above the slope.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional side view of an inclined ground working vehicle having a horizontal link device of the present invention.
FIG. 2 is a side sectional view of the horizontal link device of the present invention.
FIG. 3 is a view taken in the direction of the arrow X in FIG. 2;
FIG. 4 is a side view showing a state of the slope working vehicle according to the present invention on a front rising slope.
FIG. 5 is a front view showing a state of the inclined work vehicle according to the present invention on a laterally inclined land.
FIG. 6 is a partial side sectional view of another embodiment of the inclined work vehicle having the horizontal link device of the present invention.
FIG. 7 is a side view showing a configuration of a conventional construction machine for working on sloping ground.
FIG. 8 is a front view showing a configuration of a conventional construction machine for working on sloping ground.
FIG. 9 is a side view showing a state of a conventional construction machine for working on a sloping ground on a front rising sloping ground.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Inclined work vehicle, 2 ... Upper turning body, 3 ... Turning bearing, 6 ... Blade, 10 ... Lower traveling body, 11 ... Frame, 12 ... Guide wheel, 13 ... Starting wheel, 14 ... Track, 20 ... Horizontal link device 21 ... 1st link shaft, 22 ... 1st plate, 24 ... 2nd link shaft, 25 ... 2nd plate, 26 ... Hydraulic cylinder.

Claims (2)

In an inclined terrain vehicle equipped with a horizontal link device that mounts the upper turning body (2) on the crawler type lower traveling body (10) and tilts the upper turning body (2) in the front / rear and left / right directions when working on the slope. ,
The horizontal link device (20) for inclining the upper swing body (2) in the front-rear and left-right directions ,
A first link shaft (21) provided horizontally in the left-right direction on the front side of the turning center of the upper turning body (2) of the frame (11) constituting the lower traveling body (10) ;
A first plate (22) having one end pivotably attached to the first link shaft (21) and the other end extending rearward ;
The lateral center part of the first on the plate (22), a second link shaft which is horizontally mounted in the longitudinal direction (24),
A second plate (25) mounted on the second link shaft (24) with a swingable central portion in the left-right direction and mounted with an upper swing body (2) ;
An inclined terrain vehicle characterized by having a pair of hydraulic cylinders (26, 26) connecting the left and right ends of the rear side end of the second plate (25) and the frame (11) . The inclined terrain vehicle according to claim 1 ,
The hydraulic cylinder (26) has one end pivoted near the first link shaft (21) provided on the frame (11) and the other end pivoted on the rear end of the second plate (25). An inclined terrain vehicle that is worn and is inclined in the front-rear direction .

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