JP2765666B2 - How to drive a muddy work vehicle for civil engineering - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called amphibious mud work vehicle.

[0002]

2. Description of the Related Art Generally, work is carried out on a mud (soft ground) deposited in a bay, for example, by a civil engineering work vehicle such as a power shovel. One of the muddy work vehicles used therein is provided with a traveling device comprising a crawler belt (hereinafter, referred to as a float type crawler) which surrounds a pair of floats provided on a pair of right and left sides. There is a car that can run on the surface of the sludge and can also run on hard ground.

[0003] However, this floating type crawler on a mud is extremely large because the ground pressure is still high where there is no water, and the airframe sinks deeply into the surface of the sludge, making traveling difficult. However, it has been proposed to lower the contact pressure by moving another float type tank up and down between the float type crawler below the fuselage (for example, Japanese Utility Model Publication No. 56-31489). Gazette).

However, as a result of trial and error by the present inventor, even a work vehicle with a float type crawler equipped with such a separate float type tank is still difficult to travel for the following reasons. There was found. That is, as shown in FIG. 6, the crawler belt 1 originally travels while gripping the soil 52 by the shroud 51 protruding from the lower surface of the crawler link 50. The portion 52a gripped by the provided shoe 51 is sheared from the ground at a base 53 thereof, and the soil 52 sticks to the crawler link 50 and the shoe 51, so that even if the ground pressure is reduced, the idle rotation will occur. In particular, this type of muddy work vehicle is difficult to reduce the contact pressure because of its large size, and usually has a large sinking amount and a large running resistance. There is a problem in that the running resistance due to the settlement increases in accordance with the rotation of the crawler and the running becomes difficult.

[0005] On the other hand, there are some examples of using an impeller to propel a hull (for example, see Japanese Patent Publication No. 52-12 / 1982).
No. 993), all of the impellers rotate at high speed in water and have a problem that they cannot be applied to muddy work vehicles as they are.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the traveling performance of a muddy work vehicle, and its gist is as follows. 1) A ground plate for reducing a ground pressure. or machine base is supported by the float-type tank, the該機stand, propelled mud on a work vehicle having a crawler belt traveling unit which surrounds the float platform for running the land front side of the machine base Equipped with a power shovel
On the back side of the machine base, and is provided with an impeller for running halfway into the soft ground and rotating at a low speed, and capable of moving up and down the soft ground. A traveling device for a vehicle, 2) a pedestal supported by a grounding plate or a float type tank for reducing the contact pressure, and equipped with a four-wheel traveling device for traveling on land; In a traveling muddy work vehicle, power is applied to the front side of the machine
A shovel is mounted, and a tow hitch is provided at the front end or the rear end of the machine base, and on the rear side of the machine base, it is partially immersed in soft ground, rotates at a low speed, and runs on the soft ground. In which the impeller is provided so as to be able to move up and down.

[0007]

[Function] When traveling on land, the impeller is lifted up and traveled by wheels or crawlers provided on the machine base.
When traveling on mud, the ground pressure is reduced by a float type tank and a float type crawler, and the impeller is half immersed in the mud and rotated to travel. Mud work vehicle ahead
Because the excavator is mounted on the side,
Work area is wide in front of muddy work vehicle and on both left and right sides
Blades that can be secured at the rear of the muddy work vehicle
The weight balance with the excavator is maintained by the car
Make riding on mud stable.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention, together with the operation thereof, will be described in detail with reference to the embodiments shown in the accompanying drawings. 1 is a side view of a first embodiment of the present invention, FIG. 2 is a partially omitted plan view of FIG. 1, and FIG. 3 is a front view of FIG.

The first embodiment is a muddy work vehicle with a loading platform equipped with a traveling device of a float type crawler, which is a large work vehicle having a total weight of 45 tons and a total length of about 14 m when loaded. It is suitable. In these drawings, reference numeral 1 denotes a pair of crawler belts, which rotate around a float type crawler base 2. Reference numeral 3 denotes a float type tank provided between the float type roller stands 2 and 2, and a machine base 4 is mounted on an upper surface thereof with a projecting portion 4a formed rearward. The machine base 4 is provided with a power shovel 5 with a crane at the front so as to be pivotable, and a carrier 6 at the middle. Also, a projecting portion 4 at the rear of the machine base 4.
A is provided with a traveling impeller 7, which will be described later, and further provided with an operator's waiting room 8 at the rear. Reference numeral 9 denotes an engine used when running on sludge.

The power shovel 5 is an ordinary large-sized one, and can be rotated by 360.degree.
1, a cab 13 and an operator's cab 13 and the like. In particular, a crane 11a is attached to the tip side of the arm 11. When the muddy working vehicle according to the present embodiment travels on land, the crawler belt 1 is driven by an engine (not shown) provided in the power shovel 5. The loading frame 6 is mounted on the loading platform 6 so that, for example, a 700 mmφ steel pipe 14 can be loaded in the lateral direction.
5, 15 are erected.

Here, in this embodiment, a traveling impeller 7 is particularly provided, and the traveling impeller 7 travels on the sludge. This impeller 7
Is suspended by a pair of left and right stands 16 and 16 so as to be able to be lifted and lowered in a protruding portion 4 a of the machine base 4. The stand 16 is formed in a gate shape and is fixed to the protruding portion 4a. A guide liner 17 is provided on an inner surface facing the stand 16 and the guide liner 17 is provided.
The bearing 18 of the impeller 7 is guided. An impeller lifting cylinder 19 is connected between the bearing portion 18 and the ceiling beam 16a of the stand 16, and both ends of the impeller 7 are suspended. The operation of the cylinder 19 causes the impeller 7 to move up and down. Further, the impeller 7 has a structure in which, for example, a twelve curved disk or a flat plate is fixed to a rotating disk on both sides, for example, on the both side rotating disks. A cylindrical scraping rotor used for a truck may be used. Further, a mudguard cover is provided at an appropriate distance around the outer periphery of the impeller 7, but is not shown. Reference numeral 20 denotes a reinforcing member attached to the lower surface of the protruding portion 4a, and reference numeral 21 denotes a protruding portion 4a.
The platform 22 formed around the periphery indicates a handrail.

With the above configuration, the ground pressure in the muddy working vehicle of the present embodiment is as follows. That is, the contact pressure (weight / contact area) of a working vehicle equipped with a general crawler-type traveling device is normally 0.3 to 0.3 in hard ground of the ground.
It is a 0.7 kgf / cm ^2, in the soft ground service vehicle of the present embodiment is used, since the ground pressure is 0.2 kgf / cm ² or less in place, flow - without DOO not possibly be used. Therefore, the float type crawler stand 2 and the float type tank 3
As a result, the sinking amount was 260 mm and the contact pressure was 0.0
It was reduced to 6 kgf / cm ² .

Next, the operation of the present embodiment will be described. In order to make the muddy working vehicle of the present embodiment travel on land, the lifting / lowering cylinder 19 is contracted and the impeller 7 is brought into contact with the crawler belt 1. Keep it above the ground. And power shovel 5
The crawler belt 1 is driven by the engine (not shown) to run. Further, in order to run or propel on the sludge layer or on fresh water, the lifting cylinder 19 is extended and the impeller 7 is positioned below the ground contact surface of the crawler belt. Then, the impeller 7 is hydraulically driven at a low speed (9 rpm) by a dedicated engine 9 to perform propulsion. At that time, the crawler 1 is simultaneously driven to perform the steering operation.

Next, a second embodiment of the present invention will be described. FIG. 4 is a side view and FIG. 5 is a plan view of FIG. 4, but different points from the first embodiment will be described. The impellers 23 are respectively mounted on the outside of the float type tank 3 at substantially the center of gravity of the float type tank 3. That is, a pair of columns 24, 24 are provided upright on the left and right sides of the machine base 4, a support pin 25 is provided above the column 24, and the base of the arm 26 for the impeller is turned on the support pin 25. It is movably mounted. An impeller 23 is rotatably attached to the tip of the arm 26. The impeller 23 is mounted on the machine base 4 and a hydraulic motor (not shown) is driven by an engine (not shown) for running on the sludge. -It is configured to rotate through the data. An impeller swinging cylinder 27 is pin-connected to the tip end of the arm 26, and a base of the cylinder 27 is swingably supported by a support 28 provided on the machine base 4. Also, the first
In the same manner as in the embodiment of FIG.
You can also run. Therefore, the muddy work vehicle of the second embodiment is smaller than that of the first embodiment, and a transport trolley (not shown) is separately provided, and the vehicle is connected to travel. It has become. The machine base 4 is mounted on the upper surface of the float tank 29,
The float tank 29 is provided with a four-wheel traveling device (not shown). Therefore, a wire or the like is fastened to the hitches 30, 30 provided at the front and rear ends of the machine base 4 at the sludge work site, and the vehicle is quickly driven by a winch or tow. Steering is performed by controlling the rotation speed of the hydraulic motor.

In the first and second embodiments, a float type tank is used to reduce the ground pressure.
The present invention is not limited to this, and may be a vertically movable ground plate.

[0016]

According to the present invention, since the impeller which rotates half-immersed in the mud is provided, slipping does not occur when traveling on the mud, and the vehicle can be reliably driven.
The running can be adjusted by raising and lowering the impeller depending on the degree of hardness of the soft ground. Also in front of the muddy working vehicle
Because the excavator is mounted on the side,
Work area is wide in front of muddy work vehicle and on both left and right sides
Blades that can be secured at the rear of the muddy work vehicle
The weight balance with the excavator is maintained by the car
Stable traveling on mud.

[Brief description of the drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is a partially omitted plan view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a side view of a second embodiment of the present invention.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is an explanatory diagram.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Crawler belt, 3 ... Tank, 4 ... Machine stand, 7 ... Impeller, 19 ... Impeller raising / lowering cylinder, 23 ... Impeller, 27
... Cylinders for swinging impellers

Claims (2)

(57) [Claims] 1. A machine having a crawler belt type traveling device which supports a machine base by a grounding plate or a float type tank for reducing the ground pressure and surrounds the float base for traveling on land. In a traveling muddy work vehicle, a power shovel is mounted on the front side of the machine base , and on the rear side of the machine body, it is half-immersed in soft ground and rotates at a low speed,
A traveling device for a muddy working vehicle, wherein an impeller for traveling on the soft ground is provided so as to be able to move up and down. 2. A self-propelled muddy work in which the machine base is supported by a grounding plate or a float type tank for reducing the ground pressure, and the machine base is provided with a four-wheel traveling device for traveling on land. In the car, a power shovel is mounted on the front side of the machine, and a tow hitch is provided at a front end or a rear end of the machine, and on the rear side of the machine, the vehicle is partially immersed in soft ground and is rotated at a low speed. A traveling device for a muddy working vehicle, wherein an impeller for traveling on the soft ground is provided so as to be able to move up and down.