JP2009292198A - Transportation vehicle capable of measuring laden state - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a transportation vehicle, capable of measuring laden weight by utilizing a wheel suspension device, is configured such that a load cell provided above an axle hits a bearing hard when a vehicle body largely bounces. <P>SOLUTION: A position where a load cell is arranged is not arranged under a vehicle-body frame but outside the vehicle-body frame 37, thereby increasing an interval between the load cell 35 and an axle of a wheel 38. Even if it is a transportation vehicle with a low vehicle height capable of measuring laden weight, the vehicle has an advantage that an air spring and a leaf spring exert 100% their original buffering function so as to allow the vehicle to travel on a severely uneven road. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

    The present invention relates to an apparatus for confirming a loading state of a transport vehicle, and more particularly, to an apparatus for improving traveling stability of a transport vehicle on which a load is loaded.

A truck 1 illustrated in FIG. 1, a truck 6 illustrated in FIG. 2, and a truck 12 illustrated in FIG. 3 are conventional transport vehicles capable of measuring a loaded state.
As shown in FIGS. 1, 2, and 3, the conventional transport vehicle capable of measuring the loading state has a load cell disposed between the wheel axle and the vehicle body frame.

FIG. 4 is a cross-sectional view showing a situation where the load cell 2 in the lorry 1 is disposed above the axle of the “wheel suspension device having an air spring” in the wheel 4.
FIG. 5 is a cross-sectional view showing a situation in which the load cell 2 displayed in FIG. 4 measures the descending force of the vehicle body frame 5, (11).

    When the descending force of the vehicle body frame 5 is measured by the load cell 2, as shown in FIG. 5, when the compressed air of the air spring 3 is removed and the vehicle body frame 5 is lowered, the vehicle frame 5 is pressed. The load generated by the load cell 2 is measured.

    The load cell 2 disposed above the axle of the wheel 4 of the lorry 6 in FIG. 2 is also measured in the same manner as the load cell 2 in the lorry 1.

FIG. 6 is a cross-sectional view showing a situation in which the load cell 7 disposed above the axle of the wheel 9 measures the descending force of the vehicle body frame 11 in the lorry 6.
When the descending force of the body frame 11 is measured by the load cell 7, when the wheel 10 is pulled up and the compressed air of the air spring 8 is removed and the body frame 11 is lowered, the pressure is generated from the body frame 11. The load is measured by the load cell 7.

    The load cell 7 disposed above the axle of the wheel 9 of the lorry 12 in FIG. 3 is also measured in the same manner as the load cell 7 in the lorry 6.

FIG. 7 shows the air spring 3 while the load cell 2 is measuring the descending force of the vehicle body frame 5.
When the compressed air of the air spring 3 is removed, as shown in FIG. 7, the load cell 2 is placed on the cradle before the upper part of the air spring 3 pressed from the body frame 5 contacts the buffer portion 17. The suspension pillar 18 is interposed between the load cell 2 and the vehicle body frame 5 so that the upper part of the air spring 3 cannot come into contact with the buffer portion 17 so as to press 19.
Since the air spring 3 is manufactured so that the upper part of the air spring 3 does not come into contact with the buffer portion 17 even when the vehicle body is greatly shaken up and down during traveling, the length of the suspension pillar 18 is shortened as much as possible. By doing so, since the space | interval of the load cell 2 and the receiving stand 19 at the time of driving | running | working is enlarged, the air spring 3 can exhibit the function.
The buffer portion 17 of the air spring 3 is provided for the purpose of protecting the vehicle when the air spring 3 or the pneumatic circuit related to the air spring 3 breaks down or in the inspection and maintenance of the pneumatic circuit. is there.

    The relationship between the suspension pillar 20 and the air springs 8 and 8 aligned with the load cell 7 in FIG. 2 and the relationship between the suspension pillar 20 and the air springs 8 and 8 aligned with the load cell 7 in FIG. Since the distance between the load cell 7 and the cradle 21 during traveling is increased in the same manner as the relationship between the pillar 18, the load cell 2, and the air spring 3, the air spring 8 can exhibit its function.

FIG. 8 is a cross-sectional view showing a situation where the load cell 13 is disposed above the axle of the wheel 15 in the lorry 12.
The axle bearing 24 of the wheel 15 has an insertion hole 27 through which the leaf spring 14 is inserted, and the bottom surface of the insertion hole 27 is pressed by the leaf spring 14.
The leaf spring 14 is pressed downward by a support portion 23 and a sliding portion 25 disposed on the vehicle body frame 16.
The load cell 13 is disposed at the tip of the piston 26 of the hydraulic cylinder 22 that is suspended from the vehicle body frame 16.

FIG. 9 is a cross-sectional view showing a situation in which the load cell 13 disposed above the leaf spring 14 of the wheel 15 measures the descending force of the vehicle body frame 16 in the lorry 12.
When the hydraulic cylinder 22 extends its piston 26 to increase the distance between the bearing 24 and the vehicle body frame 16 and loses the bending of the leaf spring 14, the load cell 13 measures the descending force of the vehicle body.

    9, the piston 26 of the hydraulic cylinder 22 is extended so that the space between the plate spring 28 at the time of stopping, that is, the center portion of the plate spring 14 in FIG. A state before the plate spring 14 is bent is displayed.

    Some existing transport vehicles are not so wide between the wheel axle and the body frame, so the distance between the load cells 2, 7 and the cradles 19, 21 disposed between them, and In some cases, a sufficient distance between the load cell 13 and the upper surface of the bearing 24 cannot be secured.

The conventional transportation vehicle that can measure the loading state is not so wide between the axle of the wheel and the body frame, and the load cell 2 and 7 collide with the cradles 19 and 21 when the vehicle is greatly swung up and down during traveling. As a result, the load cells 2 and 7 may be damaged, and the load cell 13 may also crash into the upper surface of the bearing 24 and be damaged.
Further, since the space between the wheel axle and the body frame is not so wide, there is a problem that the inspection and maintenance of the load cells 2 and 7 are troublesome.
Furthermore, in order to prevent damage to the load cell and facilitate inspection and maintenance, there is a problem that the space between the axle and the body frame must be widened.
Japanese Patent No. 4061558

    The problem to be solved is that when the vehicle body greatly bounces, the sensitive part of the load cell and its cradle collide.

    By setting the position where the load cell is disposed on the side surface of the body frame, not on the bottom of the body frame, the distance between the load cell and the cradle in the existing transport vehicle is increased.

    Since the load vehicle of the present invention capable of measuring the loading state does not come into contact with the load cell and its cradle when it is greatly swung up and down during traveling, the air spring and the plate even when traveling on a rough road There is an advantage that the spring can exert 100% of the original buffer function.

    Further, the load detection device that constitutes the transport vehicle of the present invention capable of measuring the loading state is not so wide between the wheel axle and the body frame. There is also an advantage that it can be applied to a “transport vehicle”.

The transport vehicle 30 of the present invention that solves the problem is one in which a load detection device 31 is mounted on the front wheel axle and the rear wheel axle of the vehicle 30.
As shown in FIG. 11, the load detection device 31 includes a support beam 32 interposed between the opposite body frames 37 and 37, and brackets provided on the outer surfaces of the body frames 37 and 37. 33, 33, and a gate-shaped gantry comprising a column in which a load cell 35 and a suspension column 34 are arranged in series is arranged above the axle of the wheel 38.

    Since the position of the load cell 35 is outside the body frame 37 in the transport vehicle 30 of the present invention, the load cell 35 is used in a conventional transport vehicle provided on the lower side of the body frame, for example, in the conventional truck 1. The load cells 2 and 2 can be disposed higher than the load cells 2 and 7 in the conventional cargo vehicle 6 and the load cells 3 and 7 in the conventional cargo vehicle 12.

Therefore, in the wheel suspension device equipped with the air spring, the position of the lower end of the load cell 35 at the time of traveling is arranged at a position slightly lower than the lower surface of the portion that contacts the buffer portion of the air spring, The load cell 35 and the cradle 36 are prevented from contacting each other even when the vehicle body frame 37 is lowered and the air spring is compressed close to the limit. The position slightly lower than the lower surface of the portion in contact with the buffer portion of the air spring means a position within the height range of the marginal gap at the top of the air spring during traveling.
Further, in the wheel suspension device provided with a leaf spring, the position of the lower end of the load cell 35 at the time of traveling is arranged at a height that does not come into contact with the cradle 36 even if the leaf spring is extended to the full limit. .
Therefore, the air spring and the leaf spring are not limited by the load cell 35, and have a remarkable effect that the original buffer function at the time of traveling can be exhibited 100%.

    Even if the air spring is compressed close to the limit or the leaf spring is extended close to the limit, the load detector 31 does not contact the load cell 35 and the cradle 36. It is a novel invention because it is difficult to conceive from a "transport vehicle that can do".

    Therefore, the transport vehicle 30 of the present invention can travel on a road with severe irregularities because the load cell 35 and the cradle 36 do not come into contact with each other when the transport vehicle 30 is greatly swung up and down during travel.

The transport vehicle is originally designed with a short-term allowable maximum stress set to 2300 kg / cm ² , so even if the load is about twice as large as the maximum allowable load weight, the body frame is excessively generated. No damage due to bending stress.

However, the transport vehicle 30 of the present invention has a support beam 32 formed of H-shaped steel between the body frames 37 and 37 as shown in FIG. It is horizontal.
The support beam 32 is not constrained by the H-shaped steel, but has a strong strength such as a square steel or a grooved steel, and both ends of the support beam 32 are fixed to the vehicle body frames 37 and 37 so as to be horizontally mounted. It ’s fine.

    When the load cells 35 and 35 measure the descending force of the body frame 37, as shown in FIG. 11, the body frame 37 has a strong support beam 32 on the front axle and the rear axle. It is supported by a horizontal gate-shaped support.

    Therefore, in the case of the transport vehicle 30 of the present invention, even if a load about twice the allowable maximum load weight is excessively loaded, the torsional force is generated by providing the support beam 32 between the brackets 33 and 33. Therefore, even if the axle distance between the front wheels and the rear wheels is large, the load weight and the axial load can be measured as long as the vehicle body frame 37 is not broken.

Although a large bending load is generated at the joint between the bracket 33 and the vehicle body frame 37, the bending stress due to the bending load is reduced by simple design means such as increasing the length of the bracket 33 in the direction of the vehicle body frame 37. By doing so, the short-term allowable maximum stress can be made smaller than 2300 kg / cm ² .

    A conventional transport vehicle capable of measuring the loading state is provided with brackets 33 and 33 and a support beam 32 in the same manner as the transport vehicle 30 of the present invention, and is provided with existing load cells 2, 7 and 13. It is possible to modify the carrying vehicle 30 of the present invention by diverting the landing pillar or the hanging hydraulic cylinder to the lower surfaces of the brackets 33 and 33.

FIG. 12 is a diagram showing a DD cross section of FIG.
As shown in FIG. 12, the transport vehicle 30 of the present invention has an advantage that if the wheel 38 is removed, the equipment of the vehicle is not in the vicinity of the load cell, so that the inspection and maintenance of the load cell can be facilitated. is there.

FIG. 10 shows an AA cross section of “conventional freight vehicle 1 capable of measuring the loading state” in FIG. 1, and the load cell 2 is disposed below the body frame 5.
Since the body frame 5 of the conventional truck 1 overloaded with a load of about twice the allowable maximum loading weight is supported only by the suspension pillars 18, there is a risk that the eccentric load acts and twists and becomes permanently deformed. .
Since the BB cross section in FIG. 2 and the CC cross section in FIG. 3 have the same shape as the AA cross section, the vehicle body frames 11 and 16 may also be permanently deformed in the same manner.

    Therefore, in the method of supporting the body frame only by the hanging pillars, it is not possible to measure the weight of the load in which the load that is about twice the allowable maximum load weight is excessively loaded.

    The load detection device 31 in the transport vehicle 30 of the present invention measures the weight of a load in which a load that is about twice as large as the allowable maximum load weight is overloaded by greatly changing the structure of applying a load to a conventional load cell. This is a novel invention.

    Since the transport vehicle of the present invention can be modified and completed with respect to all existing transport vehicles, in order to prevent a wheel dropout accident during traveling due to overloading of the transport vehicle, Can be popularized.

    Since it is possible to prevent overloading of the transport vehicle, it can be widely used in transport vehicles in order to prevent the wasteful use of fuel and excessive discharge of CO2 gas due to the overload and to protect the environment of the earth. it can.

The load cell is provided at the tip of the piston by replacing the suspension column in FIG. 11 with a hydraulic or pneumatic cylinder.
When measuring the descending force of the body frame, the piston is extended and the descending force of the body frame is supported by the load cell.

When the transport vehicle is running, the sliding portion of the piston is housed in the cylinder, and the distance between the pivoted portion and the axle is widened.
The position of the lower end of the load cell when the sliding portion of the piston is housed in the cylinder is made higher than the height of the portion that contacts the buffer portion of the air spring during traveling.

For this reason, even if it is a transport vehicle with low vehicle height, an air spring and a leaf | plate spring have the novel advantage that an original buffer function can be exhibited 100%, without being restrained from a load cell.
The transport vehicle according to the present invention can travel on a rough road because the sensitive part of the load cell and its cradle do not come into contact with each other when the transport vehicle sways up and down during travel.

    When inspecting and maintaining the air spring and the pneumatic circuit related to the air spring, or when a failure occurs in the air spring, it is possible to support the lowered vehicle body with the buffer portion of the air spring without supporting it with the load cell. As a result, there is a new advantage that the load cell is not damaged by the vehicle body that has been lowered rapidly.

FIG. 14 is a side view showing an example in which the load cell 35 is disposed so as to be able to turn.
The suspension column having the load cell at the lower end is disposed on the lower surface of the bracket disposed on the side surface of the vehicle body frame 5 via a turning mechanism.
As shown in FIG. 14, the swivel mechanism 40 is arranged on a shaft formed by pivoting the end of the suspension column 34 on the side opposite to the load cell 35 on the bracket 39 suspended from the lower surface of the bracket in FIG. By doing so, the suspension column 34 having the load cell 35 at its lower end can be turned.
The hanging column 34 may be replaced with a cylinder that operates by hydraulic pressure or pneumatic pressure.

    The turning mechanism 40 is provided with a link mechanism at the tip of the piston of the cylinder 41 that is operated by air pressure or hydraulic pressure, and the link mechanism is connected to the shaft of the pivotal portion of the hanging column 34.

When measuring the descending force of the body frame, the hanging column having the load cell at the lower end is suspended and the descending force of the body frame is supported by the load cell.
When the transport vehicle is traveling, the suspension column having the load cell at the lower end is held in a horizontal state, and the interval between the pivoted portion and the axle is widened.
For this reason, even if it is a transport vehicle with low vehicle height, an air spring and a leaf | plate spring have the advantage that an original buffer function can be exhibited 100%, without being restrained from a load cell.

    Even if the transport vehicle of the present invention is a transport vehicle having a low vehicle height, the load cell sensitive part and its cradle do not come into contact with each other when it shakes up and down greatly during travel. Can do.

The partial cross-section side view of the conventional lorry 1 which can measure a loading state is displayed. The partial cross-sectional side view of the conventional lorry 6 which can measure a loading state is displayed. The partial sectional side view of the conventional lorry 12 which can measure a loading state is displayed. FIG. 3 is a cross-sectional view showing a situation in which a load cell 2 is disposed above the front wheel axle in the truck 1 and the truck 6. FIG. 5 is a cross-sectional view showing a situation in which the load cell 2 disposed above the front wheel axle measures the descending force of the vehicle body frames 5 and (11) in the truck 1 and the truck 6. FIG. 6 is a cross-sectional view showing a situation in which the load cell 7 disposed above the rear wheel axle measures the descending force of the vehicle body frames 11 and 16 in the truck 6 and the truck 12. FIG. 6 is a cross-sectional view showing the internal state of the air spring 3 when the load cell 2 measures the descending force of the vehicle body frame 5, (11). FIG. 3 is a cross-sectional view showing a situation in which a load cell 13 is disposed above an axle of a front wheel in a lorry 12. FIG. 6 is a cross-sectional view showing a situation in which a load cell 13 disposed above a leaf spring of a front wheel measures a descending force of a vehicle body frame 16 in a lorry 12. It is explanatory drawing which is displaying the cross section in the load cell part of the conventional lorry 1,6,12 which can measure a loading state. It is explanatory drawing which is displaying the cross section in the load cell part of the transport vehicle of this invention which can measure a loading state. It is the figure which displays the DD cross section of FIG. It is the figure which displays the EE cross section of FIG. FIG. 14 is a side view showing an example in which the load cell 52 is disposed so as to be able to turn in the transport vehicle of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Truck 2 ... Load cell 3 ... Air spring 4 ... Wheel 5 ... Body frame 6 ... Truck 7 ... Load cell 8 ... · Air spring 9 ··· Wheel 10 · · · Wheel 11 · · · Body frame 12 · · · Truck 13 · Load cell 14 · · · Plate spring 15 · · · Wheel 16 · · · Body frame 17 · ··· Buffer 18 · · · Suspension column 19 · · · Receiving stand 20 · · · Suspension column 21 · · · receiving stand 22 · · · hydraulic cylinder 23 · · · support portion 24 · · · bearing 25 · · · -Sliding part 26 ... Piston 27 ... Insertion hole 28 ... Leaf spring 29 when stopped 29 ... Leaf spring when measuring 30 ... Transport vehicle 31 of the present invention ... Load detection device 32 ..Support beam 33 ... bracket 34 ... suspending column 35 ... load cell 36 ... receiving 37 ... vehicle body frame 38 ... wheel 39 ... Bracket 40 ... turning mechanism 41 ... Cylinder

Claims (6)

    In a transport vehicle capable of measuring the loading state, a support beam interposed between opposite body frames of the vehicle, a bracket provided on the outer surface of each body frame, a load cell and a suspension column are connected in series. A gate-shaped gantry made up of support pillars is arranged above the wheel axle, and the lower end of the load cell during traveling is arranged at a position slightly lower than the lower surface of the abutting portion of the buffer portion of the air spring. Load detection device.     In a transport vehicle capable of measuring the loading state, a support beam interposed between opposite body frames of the vehicle, a bracket provided on the outer surface of each body frame, a load cell and a suspension column are connected in series. The bottom of the load cell during travel is arranged at a height that does not contact the load cell cradle even when the leaf spring is extended to the limit. A load detection device characterized by being installed. 2. The load detection device according to claim 1, wherein the suspension column according to claim 1 is replaced with a hydraulic or pneumatic cylinder, and a load cell is provided at a tip of a piston of the cylinder. 3. The load detection device according to claim 2, wherein the suspension column according to claim 2 is replaced with a hydraulic or pneumatic cylinder, and a load cell is provided at a tip of a piston of the cylinder. The load detection device according to claim 1, wherein the suspension column according to claim 1 and the hydraulic cylinder according to claim 3 are arranged so as to be able to turn. The load detection device according to claim 2, wherein the suspension column according to claim 2 and the hydraulic cylinder according to claim 4 are arranged so as to be able to turn.

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