JP2000310555A - Truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly and easily recognize a loadage by raising a rear frame by a hydraulic cylinder movable up and down, applying a predetermined load to the hydraulic cylinder and detecting a hydraulic pressure measured value at the application type. SOLUTION: A supporting stay 12 of a tractor 10 supports a lift arm 13 by a leading end and rotates the lift arm in accordance with a necessary inclination of a trailer 20. A rear frame 21 having a rear body 22 of the trailer 20 fixed thereto connects with a coupling part 13a at a leading end, having wheels 25a and 25b mounted to front and rear axles under a rear part and a hydraulic cylinder 27 set to an upper part of the rear axle. When a required cargo is loaded on the rear body 22 and an oil is sent in the hydraulic cylinder 27 to increase a pressure, the rear frame 21 is raised with the wheel 25b kept in contact with the ground by the pressure of the hydraulic cylinder 27, and the wheel 25a is separated from the ground face by a pressure conforming to a loadage of the rear body 22. At this time, a total weight of the trailer 20 is applied by a predetermined ratio to the coupling part 13a and hydraulic cylinder 27, stopping the supply of the oil. An oil pressure measured value is detected. The loadage is recognized from a conversion table or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truck capable of measuring the amount of cargo loaded on a carrier.

[0002]

2. Description of the Related Art In general, cargo such as earth and sand and gravel is transported by trucks such as dump trucks. From the viewpoint of reducing transportation costs, it is required to transport more earth and sand at once. On the other hand, overloading causes a decrease in brake characteristics, etc., and may cause traffic accidents, etc.
In particular, it is obliged to install a device such as a self-weight meter so as to be able to measure the loading capacity of a truck transporting earth and sand or gravel.

[0003] Conventionally, for example, a fixed installation type load amount measuring device has been proposed as the load amount measuring device. This fixed installation type loading capacity measuring device has the device installed in a predetermined place, and moves a truck such as a dump truck loaded with earth and sand thereon to measure the total weight of the entire vehicle, and The load capacity is measured by subtracting the weight of the vehicle itself from the measured value. However, the fixed installation type load measuring device is required to perform a work of moving the vehicle to a predetermined place where the device is installed and performing the measurement for each vehicle,
There was a problem that transportation efficiency deteriorated.

[0004] In order to prevent such a decrease in transportation efficiency, there has been proposed a vehicle such as a dump truck capable of measuring the load capacity of the vehicle itself. For example, Japanese Patent Application Laid-Open No. 58-6422 discloses that, in a dump truck or the like that tilts a loading bed provided integrally with a vehicle backward, a tilting cylinder that supports and tilts the loading bed is used, and the pressure applied to the tilting cylinder is increased. There is disclosed a device provided with a device capable of measuring a load amount by detecting a load.

Further, in recent years, it has been desired to further increase the loading amount of earth and sand, gravel and the like to be transported at one time because of the need to further reduce the transportation cost. For this reason, instead of a truck that tilts the bed in the rear as in the dump truck described above, a large truck such as a tractor-truck truck that pulls a trailer with a large truck for loading earth and sand or gravel with a tractor is used. There is a need to be able to transport earth and sand by truck.

[0006]

However, the above-mentioned loading capacity measuring device deteriorates the transportation efficiency or tilts between the loading platform and the loading platform frame like a dump truck that tilts the loading platform provided at the rear of the vehicle. Can be applied only to a lorry that can measure the hydraulic pressure in the load state with a hydraulic cylinder for loading. It is difficult to use it as a device for measuring the load in a case such as a large truck.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. For example, a truck with a large amount of earth and sand loaded on a trailer in which a carrier and a carrier frame are integrally fixed and towed by a tractor is used. As described above, for a lorry in which the loading platform and the loading frame are integrally fixed, while maintaining or improving the transportation efficiency, the loading capacity of the cargo loaded on the loading platform can be accurately and easily measured and recognized. The purpose is to provide cars.

[0008]

The lorry of the present invention comprises:
In a lorry in which a carrier and a carrier frame are integrally fixed, a hydraulic cylinder capable of elevating the carrier frame is provided, and the carrier frame is raised by the hydraulic cylinder to apply a predetermined load to the hydraulic cylinder. The load weight can be recognized by detecting the oil pressure measurement value at the time.

For example, in a lorry in which a trailer having a loading platform and a loading frame integrally fixed thereto is detachably connected to a connection portion behind the tractor and the trailer is towed by the tractor, the trailing wheel of the trailer is grounded. In this state, a hydraulic cylinder capable of lifting and lowering the loading frame is provided, and the loading frame is lifted by the hydraulic cylinder to apply a predetermined load of the trailer to the hydraulic cylinder,
It is a lorry or the like that can recognize the loaded weight by detecting a hydraulic pressure measurement value under the load.

Further, when the trailer has a plurality of rows of wheels and axles and the wheels other than the last row are separated from each other, the measured value of the hydraulic pressure is measured by the hydraulic cylinder provided on the last row of axles. Is detected.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of a truck according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an embodiment of a lorry according to the present invention, and FIG.
FIG. 3 is a side view showing a state in which a truck of a truck is inclined.
FIG. 4 is a sectional view showing a hydraulic cylinder portion of the truck of FIG.

The lorry of the present embodiment is shown in FIGS.
The tractor 10 is a large truck as shown in FIG. 1 and is mainly a towing vehicle, and a trailer 20 detachably connected to the rear of the tractor 10 and pulled by the tractor 10.

The tractor 10 has a body frame 11
A support stay 12 is provided upright, and a hook-shaped lift arm 13 is pivotally supported at the tip of the support stay 12, and the lift arm 13 rotates around the tip. The rotation angle is appropriately determined according to the inclination required for the trailer 20 for placing, transporting, and unloading earth and sand. The lift arm 13 is a rod 14 of a hydraulic cylinder.
In this configuration, the trailer 20 is driven and rotated by the reciprocation of the rod 14, and the trailer 20 connected via the connecting portion 13a at the tip of the lift arm 13 is inclined.

As shown in FIG. 3, the trailer 20 has a loading platform 22 integrally mounted on a loading platform frame 21 and fixed thereto.
Is provided, and by connecting the connecting portion 13a and the mounting portion 23, the tip of the carrier frame 21 and the tip of the lift arm 13 are detachably connected. The present embodiment is a lorry in which the loading platform 22 is integrally fixed on the loading platform frame 21 and the trailer 20 is inclined by the lift arm 13 as shown in FIG. The present invention can also be applied to a lorry that pulls the trailer 20 by simply connecting it to the tractor 10 so that the trailer 20 can be detachably attached to the tractor 10, or a lorry such as a dump truck.

A front axle 24a and a rear axle 24b, which are rotatable via a suspension or the like not shown in the figure, are provided below the rear portion of the loading frame 21. Front and rear wheels 25a and 25a are provided at both ends. 25b is attached. Note that the trailer 20 is not limited to the one having two rows of wheels, and the present invention is also applicable to a trailer 20 having three or more rows of wheels or only one row of wheels.

As shown in FIG. 4, a hydraulic cylinder 27 is provided above the rear axle 24b. The hydraulic cylinder 27 is disposed on the carrier frame 21 via a bracket 26. At a position corresponding to the hydraulic cylinder 27, a pressure receiving portion 29 is provided on the axle cover 28 of the rear axle 24b.
Is provided. The hydraulic cylinder 27 has an upper port 27a serving as an oil inlet / outlet. The oil flowing from the port 27a pushes the piston 27b in the hydraulic cylinder 27, and the rod 27c passes through a rod 27c below the piston 27b. A pressing portion 27d provided at the lower end of the trailer 20 projects downward, and the pressing portion 27d presses the pressure receiving portion 29.
The platform frame 21 can be moved up and down while the ground is grounded.

The arrangement of the hydraulic cylinder 27 is not limited to the above. The positional relationship between the pressing portion 27d and the pressure receiving portion 29 is reversed, a plurality of hydraulic cylinders 27 are provided, or the connecting portion 13a is also provided. Provision of a hydraulic cylinder 27, provision of a hydraulic cylinder 27 on the rear wheel of a dump truck,
The load frame 21 is raised by the hydraulic cylinder 27, a predetermined load is applied to the hydraulic cylinder 27, and any suitable hydraulic pressure measurement value can be detected.

The hydraulic cylinder 27 is capable of inflow, inflow stop, and outflow of oil from a port 27a by a switch such as a lever. The hydraulic cylinder 27 is provided with an oil pressure gauge (not shown) capable of measuring oil pressure. The pressure in the hydraulic cylinder 27 is measured, and the measured hydraulic pressure value can be detected. By detecting the hydraulic pressure measurement value, the load weight can be recognized from a conversion table or the like that takes into account each factor such as the state of the trailer 20 and the load ratio of the load weight to the rear train shaft 24b.

At this time, the oil pressure measurement value is sent to arithmetic processing means, and the arithmetic processing means performs a predetermined calculation according to the element to calculate a load amount, and the load amount is displayed on a display means for recognition. For example, the load weight may be automatically recognized. In this case, all of the arithmetic processing means and the display means are installed on the tractor 10 or installed on the tractor 10 and the trailer 20. By installing all of them on the trailer 20, a versatile trailer 20 corresponding to various tractors 10 is provided. It is also possible to use

Next, a description will be given of a case where the loading weight is measured in the truck of the present embodiment. FIG. 5 is a side view of a main part showing a trailer rear part of the truck of FIG.

First, required cargoes such as earth and sand and gravel are loaded on the loading platform 22 of the trailer 20 as usual. Then, the switch of the hydraulic cylinder 27 is turned on to allow the oil to flow into the hydraulic cylinder 27 from the port 27a to press the piston 27b and the rod 27c, thereby causing the pressing portion 27d at the lower end of the rod 27c to protrude. The protruding pressing portion 27d reaches a pressure receiving portion 29 provided on the axle cover 28, and the pressure receiving portion 2d.
9, the rearmost axle 24b is pressed.

Thereafter, when the inflow of oil gradually increases and the pressure is increased, the bed frame 21 is raised by the pressure of the hydraulic cylinder 27 with the last row of wheels 25b of the trailer 20 in contact with the ground. Eventually, the front row wheels 25a of the trailer 20 separate from the ground at a pressure corresponding to the load weight of the loading platform 22. In the case of a trailer 20 having three or more rows of wheels, the separation is preferably performed when all the wheels other than the rearmost wheel of the trailer 20 are separated, because measurement becomes easy.

At the time of the separation, the total weight of the trailer 20 is adjusted by the connecting portion 13a and the rearmost wheel 25b (the hydraulic cylinder 2).
7) is loaded at a predetermined ratio, and at this time, the flow of oil into the hydraulic cylinder 27 is stopped and the pressure is measured.
Detect the oil pressure measurement. From the oil pressure measurement, rear train axis 2
The load weight is recognized in consideration of each factor such as the load ratio of the load weight to the load 4b, or the measured oil pressure value is sent to the arithmetic processing means to acquire and recognize the load weight as described above.

In the case where the trailer 20 is tilted by the lift arm 13, the hydraulic pressure measurement value may be acquired when the trailer 20 is in a predetermined tilt state other than the above-mentioned separation. The load weight is acquired and recognized from the hydraulic pressure measurement value by each element corresponding to the inclination state of. Further, the load applied to the hydraulic cylinder 27 to be provided is appropriate within the scope of the present invention, such as a total load or a load at a predetermined ratio, and a conversion table or the like is prepared as necessary.

[0025]

As described above, since the truck of the present invention has the above-described configuration, for example, a large amount of earth and sand is loaded on a trailer in which a carrier and a carrier frame are integrally fixed, and this is towed by a tractor. For a lorry with a luggage carrier and a luggage carrier frame integrally fixed, such as a lorry vehicle, while maintaining or improving its transportation efficiency, the amount of cargo loaded on the luggage platform can be accurately and easily measured and recognized. There is an effect that can be. Therefore, good vehicle maintenance can be achieved, and safety of vehicle operation can be ensured.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a lorry according to the present invention.

FIG. 2 is a side view of the truck shown in FIG.

FIG. 3 is a plan view showing a trailer of the truck of FIG. 1;

FIG. 4 is a sectional view showing a hydraulic cylinder portion of the truck of FIG. 1;

FIG. 5 is a side view of the main part showing the rear part of the trailer of the truck of FIG. 1;

[Explanation of symbols]

 Reference Signs List 10 tractor 11 body frame 12 support stay 13 lift arm 13a connecting part 14 rod 20 trailer 21 carrier frame 22 carrier 23 mounting part 24a, 24b axle 25a, 25b wheel 26 bracket 27 hydraulic cylinder 27a port 27b piston 27c rod 27d axle pushing part 28 Cover 29 pressure receiving part

Claims (3)

[Claims] In a truck having a carrier and a carrier frame integrally fixed thereto, a hydraulic cylinder capable of moving up and down the carrier frame is provided, and the carrier frame is raised by the hydraulic cylinder to apply a predetermined load to the hydraulic cylinder. A lorry characterized in that the loaded weight can be recognized by loading and detecting a hydraulic pressure measurement value at the time of loading. 2. A truck in which a loading platform and a loading frame are integrally fixed to a connecting portion at the rear of the tractor, which is detachably connected to the trailer. In this state, a hydraulic cylinder capable of raising and lowering the loading frame is provided, the loading frame is raised by the hydraulic cylinder to apply a predetermined load of the trailer to the hydraulic cylinder, and a hydraulic pressure measurement value at the time of loading is detected. A lorry characterized by its ability to recognize the weight of a load. 3. The trailer has a plurality of rows of wheels and an axle, and when a wheel other than the last row of wheels is separated, a hydraulic pressure value provided on the last row of axles detects a hydraulic pressure measurement value. The truck according to claim 2, characterized in that: